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f646cf94 | 1 | /* |
09b658dc | 2 | * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd. |
f646cf94 TO |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; version 2 of the License. | |
f646cf94 TO |
7 | */ |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/pci.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/usb/ch9.h> | |
17 | #include <linux/usb/gadget.h> | |
dd63180b | 18 | #include <linux/gpio.h> |
30e9eb19 | 19 | #include <linux/irq.h> |
dd63180b TM |
20 | |
21 | /* GPIO port for VBUS detecting */ | |
22 | static int vbus_gpio_port = -1; /* GPIO port number (-1:Not used) */ | |
23 | ||
24 | #define PCH_VBUS_PERIOD 3000 /* VBUS polling period (msec) */ | |
25 | #define PCH_VBUS_INTERVAL 10 /* VBUS polling interval (msec) */ | |
f646cf94 TO |
26 | |
27 | /* Address offset of Registers */ | |
28 | #define UDC_EP_REG_SHIFT 0x20 /* Offset to next EP */ | |
29 | ||
30 | #define UDC_EPCTL_ADDR 0x00 /* Endpoint control */ | |
31 | #define UDC_EPSTS_ADDR 0x04 /* Endpoint status */ | |
32 | #define UDC_BUFIN_FRAMENUM_ADDR 0x08 /* buffer size in / frame number out */ | |
33 | #define UDC_BUFOUT_MAXPKT_ADDR 0x0C /* buffer size out / maxpkt in */ | |
34 | #define UDC_SUBPTR_ADDR 0x10 /* setup buffer pointer */ | |
35 | #define UDC_DESPTR_ADDR 0x14 /* Data descriptor pointer */ | |
36 | #define UDC_CONFIRM_ADDR 0x18 /* Write/Read confirmation */ | |
37 | ||
38 | #define UDC_DEVCFG_ADDR 0x400 /* Device configuration */ | |
39 | #define UDC_DEVCTL_ADDR 0x404 /* Device control */ | |
40 | #define UDC_DEVSTS_ADDR 0x408 /* Device status */ | |
41 | #define UDC_DEVIRQSTS_ADDR 0x40C /* Device irq status */ | |
42 | #define UDC_DEVIRQMSK_ADDR 0x410 /* Device irq mask */ | |
43 | #define UDC_EPIRQSTS_ADDR 0x414 /* Endpoint irq status */ | |
44 | #define UDC_EPIRQMSK_ADDR 0x418 /* Endpoint irq mask */ | |
45 | #define UDC_DEVLPM_ADDR 0x41C /* LPM control / status */ | |
46 | #define UDC_CSR_BUSY_ADDR 0x4f0 /* UDC_CSR_BUSY Status register */ | |
47 | #define UDC_SRST_ADDR 0x4fc /* SOFT RESET register */ | |
48 | #define UDC_CSR_ADDR 0x500 /* USB_DEVICE endpoint register */ | |
49 | ||
50 | /* Endpoint control register */ | |
51 | /* Bit position */ | |
52 | #define UDC_EPCTL_MRXFLUSH (1 << 12) | |
53 | #define UDC_EPCTL_RRDY (1 << 9) | |
54 | #define UDC_EPCTL_CNAK (1 << 8) | |
55 | #define UDC_EPCTL_SNAK (1 << 7) | |
56 | #define UDC_EPCTL_NAK (1 << 6) | |
57 | #define UDC_EPCTL_P (1 << 3) | |
58 | #define UDC_EPCTL_F (1 << 1) | |
59 | #define UDC_EPCTL_S (1 << 0) | |
60 | #define UDC_EPCTL_ET_SHIFT 4 | |
61 | /* Mask patern */ | |
62 | #define UDC_EPCTL_ET_MASK 0x00000030 | |
63 | /* Value for ET field */ | |
64 | #define UDC_EPCTL_ET_CONTROL 0 | |
65 | #define UDC_EPCTL_ET_ISO 1 | |
66 | #define UDC_EPCTL_ET_BULK 2 | |
67 | #define UDC_EPCTL_ET_INTERRUPT 3 | |
68 | ||
69 | /* Endpoint status register */ | |
70 | /* Bit position */ | |
71 | #define UDC_EPSTS_XFERDONE (1 << 27) | |
72 | #define UDC_EPSTS_RSS (1 << 26) | |
73 | #define UDC_EPSTS_RCS (1 << 25) | |
74 | #define UDC_EPSTS_TXEMPTY (1 << 24) | |
75 | #define UDC_EPSTS_TDC (1 << 10) | |
76 | #define UDC_EPSTS_HE (1 << 9) | |
77 | #define UDC_EPSTS_MRXFIFO_EMP (1 << 8) | |
78 | #define UDC_EPSTS_BNA (1 << 7) | |
79 | #define UDC_EPSTS_IN (1 << 6) | |
80 | #define UDC_EPSTS_OUT_SHIFT 4 | |
81 | /* Mask patern */ | |
82 | #define UDC_EPSTS_OUT_MASK 0x00000030 | |
83 | #define UDC_EPSTS_ALL_CLR_MASK 0x1F0006F0 | |
84 | /* Value for OUT field */ | |
85 | #define UDC_EPSTS_OUT_SETUP 2 | |
86 | #define UDC_EPSTS_OUT_DATA 1 | |
87 | ||
88 | /* Device configuration register */ | |
89 | /* Bit position */ | |
90 | #define UDC_DEVCFG_CSR_PRG (1 << 17) | |
91 | #define UDC_DEVCFG_SP (1 << 3) | |
92 | /* SPD Valee */ | |
93 | #define UDC_DEVCFG_SPD_HS 0x0 | |
94 | #define UDC_DEVCFG_SPD_FS 0x1 | |
95 | #define UDC_DEVCFG_SPD_LS 0x2 | |
96 | ||
97 | /* Device control register */ | |
98 | /* Bit position */ | |
99 | #define UDC_DEVCTL_THLEN_SHIFT 24 | |
100 | #define UDC_DEVCTL_BRLEN_SHIFT 16 | |
101 | #define UDC_DEVCTL_CSR_DONE (1 << 13) | |
102 | #define UDC_DEVCTL_SD (1 << 10) | |
103 | #define UDC_DEVCTL_MODE (1 << 9) | |
104 | #define UDC_DEVCTL_BREN (1 << 8) | |
105 | #define UDC_DEVCTL_THE (1 << 7) | |
106 | #define UDC_DEVCTL_DU (1 << 4) | |
107 | #define UDC_DEVCTL_TDE (1 << 3) | |
108 | #define UDC_DEVCTL_RDE (1 << 2) | |
109 | #define UDC_DEVCTL_RES (1 << 0) | |
110 | ||
111 | /* Device status register */ | |
112 | /* Bit position */ | |
113 | #define UDC_DEVSTS_TS_SHIFT 18 | |
114 | #define UDC_DEVSTS_ENUM_SPEED_SHIFT 13 | |
115 | #define UDC_DEVSTS_ALT_SHIFT 8 | |
116 | #define UDC_DEVSTS_INTF_SHIFT 4 | |
117 | #define UDC_DEVSTS_CFG_SHIFT 0 | |
118 | /* Mask patern */ | |
119 | #define UDC_DEVSTS_TS_MASK 0xfffc0000 | |
120 | #define UDC_DEVSTS_ENUM_SPEED_MASK 0x00006000 | |
121 | #define UDC_DEVSTS_ALT_MASK 0x00000f00 | |
122 | #define UDC_DEVSTS_INTF_MASK 0x000000f0 | |
123 | #define UDC_DEVSTS_CFG_MASK 0x0000000f | |
124 | /* value for maximum speed for SPEED field */ | |
125 | #define UDC_DEVSTS_ENUM_SPEED_FULL 1 | |
126 | #define UDC_DEVSTS_ENUM_SPEED_HIGH 0 | |
127 | #define UDC_DEVSTS_ENUM_SPEED_LOW 2 | |
128 | #define UDC_DEVSTS_ENUM_SPEED_FULLX 3 | |
129 | ||
130 | /* Device irq register */ | |
131 | /* Bit position */ | |
132 | #define UDC_DEVINT_RWKP (1 << 7) | |
133 | #define UDC_DEVINT_ENUM (1 << 6) | |
134 | #define UDC_DEVINT_SOF (1 << 5) | |
135 | #define UDC_DEVINT_US (1 << 4) | |
136 | #define UDC_DEVINT_UR (1 << 3) | |
137 | #define UDC_DEVINT_ES (1 << 2) | |
138 | #define UDC_DEVINT_SI (1 << 1) | |
139 | #define UDC_DEVINT_SC (1 << 0) | |
140 | /* Mask patern */ | |
141 | #define UDC_DEVINT_MSK 0x7f | |
142 | ||
143 | /* Endpoint irq register */ | |
144 | /* Bit position */ | |
145 | #define UDC_EPINT_IN_SHIFT 0 | |
146 | #define UDC_EPINT_OUT_SHIFT 16 | |
147 | #define UDC_EPINT_IN_EP0 (1 << 0) | |
148 | #define UDC_EPINT_OUT_EP0 (1 << 16) | |
149 | /* Mask patern */ | |
150 | #define UDC_EPINT_MSK_DISABLE_ALL 0xffffffff | |
151 | ||
152 | /* UDC_CSR_BUSY Status register */ | |
153 | /* Bit position */ | |
154 | #define UDC_CSR_BUSY (1 << 0) | |
155 | ||
156 | /* SOFT RESET register */ | |
157 | /* Bit position */ | |
158 | #define UDC_PSRST (1 << 1) | |
159 | #define UDC_SRST (1 << 0) | |
160 | ||
161 | /* USB_DEVICE endpoint register */ | |
162 | /* Bit position */ | |
163 | #define UDC_CSR_NE_NUM_SHIFT 0 | |
164 | #define UDC_CSR_NE_DIR_SHIFT 4 | |
165 | #define UDC_CSR_NE_TYPE_SHIFT 5 | |
166 | #define UDC_CSR_NE_CFG_SHIFT 7 | |
167 | #define UDC_CSR_NE_INTF_SHIFT 11 | |
168 | #define UDC_CSR_NE_ALT_SHIFT 15 | |
169 | #define UDC_CSR_NE_MAX_PKT_SHIFT 19 | |
170 | /* Mask patern */ | |
171 | #define UDC_CSR_NE_NUM_MASK 0x0000000f | |
172 | #define UDC_CSR_NE_DIR_MASK 0x00000010 | |
173 | #define UDC_CSR_NE_TYPE_MASK 0x00000060 | |
174 | #define UDC_CSR_NE_CFG_MASK 0x00000780 | |
175 | #define UDC_CSR_NE_INTF_MASK 0x00007800 | |
176 | #define UDC_CSR_NE_ALT_MASK 0x00078000 | |
177 | #define UDC_CSR_NE_MAX_PKT_MASK 0x3ff80000 | |
178 | ||
179 | #define PCH_UDC_CSR(ep) (UDC_CSR_ADDR + ep*4) | |
180 | #define PCH_UDC_EPINT(in, num)\ | |
181 | (1 << (num + (in ? UDC_EPINT_IN_SHIFT : UDC_EPINT_OUT_SHIFT))) | |
182 | ||
183 | /* Index of endpoint */ | |
184 | #define UDC_EP0IN_IDX 0 | |
185 | #define UDC_EP0OUT_IDX 1 | |
186 | #define UDC_EPIN_IDX(ep) (ep * 2) | |
187 | #define UDC_EPOUT_IDX(ep) (ep * 2 + 1) | |
188 | #define PCH_UDC_EP0 0 | |
189 | #define PCH_UDC_EP1 1 | |
190 | #define PCH_UDC_EP2 2 | |
191 | #define PCH_UDC_EP3 3 | |
192 | ||
193 | /* Number of endpoint */ | |
194 | #define PCH_UDC_EP_NUM 32 /* Total number of EPs (16 IN,16 OUT) */ | |
195 | #define PCH_UDC_USED_EP_NUM 4 /* EP number of EP's really used */ | |
196 | /* Length Value */ | |
197 | #define PCH_UDC_BRLEN 0x0F /* Burst length */ | |
198 | #define PCH_UDC_THLEN 0x1F /* Threshold length */ | |
199 | /* Value of EP Buffer Size */ | |
abab0c67 TO |
200 | #define UDC_EP0IN_BUFF_SIZE 16 |
201 | #define UDC_EPIN_BUFF_SIZE 256 | |
202 | #define UDC_EP0OUT_BUFF_SIZE 16 | |
203 | #define UDC_EPOUT_BUFF_SIZE 256 | |
f646cf94 TO |
204 | /* Value of EP maximum packet size */ |
205 | #define UDC_EP0IN_MAX_PKT_SIZE 64 | |
206 | #define UDC_EP0OUT_MAX_PKT_SIZE 64 | |
207 | #define UDC_BULK_MAX_PKT_SIZE 512 | |
208 | ||
209 | /* DMA */ | |
210 | #define DMA_DIR_RX 1 /* DMA for data receive */ | |
211 | #define DMA_DIR_TX 2 /* DMA for data transmit */ | |
212 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
213 | #define UDC_DMA_MAXPACKET 65536 /* maximum packet size for DMA */ | |
214 | ||
215 | /** | |
216 | * struct pch_udc_data_dma_desc - Structure to hold DMA descriptor information | |
217 | * for data | |
218 | * @status: Status quadlet | |
219 | * @reserved: Reserved | |
220 | * @dataptr: Buffer descriptor | |
221 | * @next: Next descriptor | |
222 | */ | |
223 | struct pch_udc_data_dma_desc { | |
224 | u32 status; | |
225 | u32 reserved; | |
226 | u32 dataptr; | |
227 | u32 next; | |
228 | }; | |
229 | ||
230 | /** | |
231 | * struct pch_udc_stp_dma_desc - Structure to hold DMA descriptor information | |
232 | * for control data | |
233 | * @status: Status | |
234 | * @reserved: Reserved | |
235 | * @data12: First setup word | |
236 | * @data34: Second setup word | |
237 | */ | |
238 | struct pch_udc_stp_dma_desc { | |
239 | u32 status; | |
240 | u32 reserved; | |
241 | struct usb_ctrlrequest request; | |
242 | } __attribute((packed)); | |
243 | ||
244 | /* DMA status definitions */ | |
245 | /* Buffer status */ | |
246 | #define PCH_UDC_BUFF_STS 0xC0000000 | |
247 | #define PCH_UDC_BS_HST_RDY 0x00000000 | |
248 | #define PCH_UDC_BS_DMA_BSY 0x40000000 | |
249 | #define PCH_UDC_BS_DMA_DONE 0x80000000 | |
250 | #define PCH_UDC_BS_HST_BSY 0xC0000000 | |
251 | /* Rx/Tx Status */ | |
252 | #define PCH_UDC_RXTX_STS 0x30000000 | |
253 | #define PCH_UDC_RTS_SUCC 0x00000000 | |
254 | #define PCH_UDC_RTS_DESERR 0x10000000 | |
255 | #define PCH_UDC_RTS_BUFERR 0x30000000 | |
256 | /* Last Descriptor Indication */ | |
257 | #define PCH_UDC_DMA_LAST 0x08000000 | |
258 | /* Number of Rx/Tx Bytes Mask */ | |
259 | #define PCH_UDC_RXTX_BYTES 0x0000ffff | |
260 | ||
261 | /** | |
262 | * struct pch_udc_cfg_data - Structure to hold current configuration | |
263 | * and interface information | |
264 | * @cur_cfg: current configuration in use | |
265 | * @cur_intf: current interface in use | |
266 | * @cur_alt: current alt interface in use | |
267 | */ | |
268 | struct pch_udc_cfg_data { | |
269 | u16 cur_cfg; | |
270 | u16 cur_intf; | |
271 | u16 cur_alt; | |
272 | }; | |
273 | ||
274 | /** | |
275 | * struct pch_udc_ep - Structure holding a PCH USB device Endpoint information | |
276 | * @ep: embedded ep request | |
277 | * @td_stp_phys: for setup request | |
278 | * @td_data_phys: for data request | |
279 | * @td_stp: for setup request | |
280 | * @td_data: for data request | |
281 | * @dev: reference to device struct | |
282 | * @offset_addr: offset address of ep register | |
283 | * @desc: for this ep | |
284 | * @queue: queue for requests | |
285 | * @num: endpoint number | |
286 | * @in: endpoint is IN | |
287 | * @halted: endpoint halted? | |
288 | * @epsts: Endpoint status | |
289 | */ | |
290 | struct pch_udc_ep { | |
291 | struct usb_ep ep; | |
292 | dma_addr_t td_stp_phys; | |
293 | dma_addr_t td_data_phys; | |
294 | struct pch_udc_stp_dma_desc *td_stp; | |
295 | struct pch_udc_data_dma_desc *td_data; | |
296 | struct pch_udc_dev *dev; | |
297 | unsigned long offset_addr; | |
f646cf94 TO |
298 | struct list_head queue; |
299 | unsigned num:5, | |
300 | in:1, | |
301 | halted:1; | |
302 | unsigned long epsts; | |
303 | }; | |
304 | ||
dd63180b TM |
305 | /** |
306 | * struct pch_vbus_gpio_data - Structure holding GPIO informaton | |
307 | * for detecting VBUS | |
308 | * @port: gpio port number | |
637b78eb | 309 | * @intr: gpio interrupt number |
dd63180b | 310 | * @irq_work_fall Structure for WorkQueue |
637b78eb | 311 | * @irq_work_rise Structure for WorkQueue |
dd63180b TM |
312 | */ |
313 | struct pch_vbus_gpio_data { | |
314 | int port; | |
637b78eb | 315 | int intr; |
dd63180b | 316 | struct work_struct irq_work_fall; |
637b78eb | 317 | struct work_struct irq_work_rise; |
dd63180b TM |
318 | }; |
319 | ||
f646cf94 TO |
320 | /** |
321 | * struct pch_udc_dev - Structure holding complete information | |
322 | * of the PCH USB device | |
323 | * @gadget: gadget driver data | |
324 | * @driver: reference to gadget driver bound | |
325 | * @pdev: reference to the PCI device | |
326 | * @ep: array of endpoints | |
327 | * @lock: protects all state | |
f646cf94 TO |
328 | * @stall: stall requested |
329 | * @prot_stall: protcol stall requested | |
ebd29385 | 330 | * @registered: driver registered with system |
f646cf94 TO |
331 | * @suspended: driver in suspended state |
332 | * @connected: gadget driver associated | |
1c575d2d | 333 | * @vbus_session: required vbus_session state |
f646cf94 TO |
334 | * @set_cfg_not_acked: pending acknowledgement 4 setup |
335 | * @waiting_zlp_ack: pending acknowledgement 4 ZLP | |
336 | * @data_requests: DMA pool for data requests | |
337 | * @stp_requests: DMA pool for setup requests | |
338 | * @dma_addr: DMA pool for received | |
f646cf94 | 339 | * @setup_data: Received setup data |
f646cf94 | 340 | * @base_addr: for mapped device memory |
f646cf94 | 341 | * @cfg_data: current cfg, intf, and alt in use |
dd63180b | 342 | * @vbus_gpio: GPIO informaton for detecting VBUS |
f646cf94 TO |
343 | */ |
344 | struct pch_udc_dev { | |
345 | struct usb_gadget gadget; | |
346 | struct usb_gadget_driver *driver; | |
347 | struct pci_dev *pdev; | |
348 | struct pch_udc_ep ep[PCH_UDC_EP_NUM]; | |
49e20834 | 349 | spinlock_t lock; /* protects all state */ |
969733f3 | 350 | unsigned |
f646cf94 TO |
351 | stall:1, |
352 | prot_stall:1, | |
f646cf94 TO |
353 | suspended:1, |
354 | connected:1, | |
1c575d2d | 355 | vbus_session:1, |
f646cf94 TO |
356 | set_cfg_not_acked:1, |
357 | waiting_zlp_ack:1; | |
358 | struct pci_pool *data_requests; | |
359 | struct pci_pool *stp_requests; | |
360 | dma_addr_t dma_addr; | |
f646cf94 | 361 | struct usb_ctrlrequest setup_data; |
f646cf94 | 362 | void __iomem *base_addr; |
dd63180b TM |
363 | struct pch_udc_cfg_data cfg_data; |
364 | struct pch_vbus_gpio_data vbus_gpio; | |
f646cf94 | 365 | }; |
1fb3b1cf | 366 | #define to_pch_udc(g) (container_of((g), struct pch_udc_dev, gadget)) |
f646cf94 | 367 | |
a68df706 | 368 | #define PCH_UDC_PCI_BAR_QUARK_X1000 0 |
f646cf94 | 369 | #define PCH_UDC_PCI_BAR 1 |
e4875bd4 | 370 | |
a68df706 | 371 | #define PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC 0x0939 |
e4875bd4 AS |
372 | #define PCI_DEVICE_ID_INTEL_EG20T_UDC 0x8808 |
373 | ||
06f1b971 TM |
374 | #define PCI_VENDOR_ID_ROHM 0x10DB |
375 | #define PCI_DEVICE_ID_ML7213_IOH_UDC 0x801D | |
731ad81e | 376 | #define PCI_DEVICE_ID_ML7831_IOH_UDC 0x8808 |
f646cf94 TO |
377 | |
378 | static const char ep0_string[] = "ep0in"; | |
379 | static DEFINE_SPINLOCK(udc_stall_spinlock); /* stall spin lock */ | |
90ab5ee9 | 380 | static bool speed_fs; |
f646cf94 TO |
381 | module_param_named(speed_fs, speed_fs, bool, S_IRUGO); |
382 | MODULE_PARM_DESC(speed_fs, "true for Full speed operation"); | |
383 | ||
384 | /** | |
385 | * struct pch_udc_request - Structure holding a PCH USB device request packet | |
386 | * @req: embedded ep request | |
387 | * @td_data_phys: phys. address | |
388 | * @td_data: first dma desc. of chain | |
389 | * @td_data_last: last dma desc. of chain | |
390 | * @queue: associated queue | |
391 | * @dma_going: DMA in progress for request | |
392 | * @dma_mapped: DMA memory mapped for request | |
393 | * @dma_done: DMA completed for request | |
394 | * @chain_len: chain length | |
c17f459c TO |
395 | * @buf: Buffer memory for align adjustment |
396 | * @dma: DMA memory for align adjustment | |
f646cf94 TO |
397 | */ |
398 | struct pch_udc_request { | |
399 | struct usb_request req; | |
400 | dma_addr_t td_data_phys; | |
401 | struct pch_udc_data_dma_desc *td_data; | |
402 | struct pch_udc_data_dma_desc *td_data_last; | |
403 | struct list_head queue; | |
404 | unsigned dma_going:1, | |
405 | dma_mapped:1, | |
406 | dma_done:1; | |
407 | unsigned chain_len; | |
c17f459c TO |
408 | void *buf; |
409 | dma_addr_t dma; | |
f646cf94 TO |
410 | }; |
411 | ||
412 | static inline u32 pch_udc_readl(struct pch_udc_dev *dev, unsigned long reg) | |
413 | { | |
414 | return ioread32(dev->base_addr + reg); | |
415 | } | |
416 | ||
417 | static inline void pch_udc_writel(struct pch_udc_dev *dev, | |
418 | unsigned long val, unsigned long reg) | |
419 | { | |
420 | iowrite32(val, dev->base_addr + reg); | |
421 | } | |
422 | ||
423 | static inline void pch_udc_bit_set(struct pch_udc_dev *dev, | |
424 | unsigned long reg, | |
425 | unsigned long bitmask) | |
426 | { | |
427 | pch_udc_writel(dev, pch_udc_readl(dev, reg) | bitmask, reg); | |
428 | } | |
429 | ||
430 | static inline void pch_udc_bit_clr(struct pch_udc_dev *dev, | |
431 | unsigned long reg, | |
432 | unsigned long bitmask) | |
433 | { | |
434 | pch_udc_writel(dev, pch_udc_readl(dev, reg) & ~(bitmask), reg); | |
435 | } | |
436 | ||
437 | static inline u32 pch_udc_ep_readl(struct pch_udc_ep *ep, unsigned long reg) | |
438 | { | |
439 | return ioread32(ep->dev->base_addr + ep->offset_addr + reg); | |
440 | } | |
441 | ||
442 | static inline void pch_udc_ep_writel(struct pch_udc_ep *ep, | |
443 | unsigned long val, unsigned long reg) | |
444 | { | |
445 | iowrite32(val, ep->dev->base_addr + ep->offset_addr + reg); | |
446 | } | |
447 | ||
448 | static inline void pch_udc_ep_bit_set(struct pch_udc_ep *ep, | |
449 | unsigned long reg, | |
450 | unsigned long bitmask) | |
451 | { | |
452 | pch_udc_ep_writel(ep, pch_udc_ep_readl(ep, reg) | bitmask, reg); | |
453 | } | |
454 | ||
455 | static inline void pch_udc_ep_bit_clr(struct pch_udc_ep *ep, | |
456 | unsigned long reg, | |
457 | unsigned long bitmask) | |
458 | { | |
459 | pch_udc_ep_writel(ep, pch_udc_ep_readl(ep, reg) & ~(bitmask), reg); | |
460 | } | |
461 | ||
462 | /** | |
463 | * pch_udc_csr_busy() - Wait till idle. | |
464 | * @dev: Reference to pch_udc_dev structure | |
465 | */ | |
466 | static void pch_udc_csr_busy(struct pch_udc_dev *dev) | |
467 | { | |
468 | unsigned int count = 200; | |
469 | ||
470 | /* Wait till idle */ | |
471 | while ((pch_udc_readl(dev, UDC_CSR_BUSY_ADDR) & UDC_CSR_BUSY) | |
472 | && --count) | |
473 | cpu_relax(); | |
474 | if (!count) | |
475 | dev_err(&dev->pdev->dev, "%s: wait error\n", __func__); | |
476 | } | |
477 | ||
478 | /** | |
479 | * pch_udc_write_csr() - Write the command and status registers. | |
480 | * @dev: Reference to pch_udc_dev structure | |
481 | * @val: value to be written to CSR register | |
482 | * @addr: address of CSR register | |
483 | */ | |
484 | static void pch_udc_write_csr(struct pch_udc_dev *dev, unsigned long val, | |
485 | unsigned int ep) | |
486 | { | |
487 | unsigned long reg = PCH_UDC_CSR(ep); | |
488 | ||
489 | pch_udc_csr_busy(dev); /* Wait till idle */ | |
490 | pch_udc_writel(dev, val, reg); | |
491 | pch_udc_csr_busy(dev); /* Wait till idle */ | |
492 | } | |
493 | ||
494 | /** | |
495 | * pch_udc_read_csr() - Read the command and status registers. | |
496 | * @dev: Reference to pch_udc_dev structure | |
497 | * @addr: address of CSR register | |
498 | * | |
499 | * Return codes: content of CSR register | |
500 | */ | |
501 | static u32 pch_udc_read_csr(struct pch_udc_dev *dev, unsigned int ep) | |
502 | { | |
503 | unsigned long reg = PCH_UDC_CSR(ep); | |
504 | ||
505 | pch_udc_csr_busy(dev); /* Wait till idle */ | |
506 | pch_udc_readl(dev, reg); /* Dummy read */ | |
507 | pch_udc_csr_busy(dev); /* Wait till idle */ | |
508 | return pch_udc_readl(dev, reg); | |
509 | } | |
510 | ||
511 | /** | |
512 | * pch_udc_rmt_wakeup() - Initiate for remote wakeup | |
513 | * @dev: Reference to pch_udc_dev structure | |
514 | */ | |
515 | static inline void pch_udc_rmt_wakeup(struct pch_udc_dev *dev) | |
516 | { | |
517 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
518 | mdelay(1); | |
519 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
520 | } | |
521 | ||
522 | /** | |
523 | * pch_udc_get_frame() - Get the current frame from device status register | |
524 | * @dev: Reference to pch_udc_dev structure | |
525 | * Retern current frame | |
526 | */ | |
527 | static inline int pch_udc_get_frame(struct pch_udc_dev *dev) | |
528 | { | |
529 | u32 frame = pch_udc_readl(dev, UDC_DEVSTS_ADDR); | |
530 | return (frame & UDC_DEVSTS_TS_MASK) >> UDC_DEVSTS_TS_SHIFT; | |
531 | } | |
532 | ||
533 | /** | |
534 | * pch_udc_clear_selfpowered() - Clear the self power control | |
535 | * @dev: Reference to pch_udc_regs structure | |
536 | */ | |
537 | static inline void pch_udc_clear_selfpowered(struct pch_udc_dev *dev) | |
538 | { | |
539 | pch_udc_bit_clr(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_SP); | |
540 | } | |
541 | ||
542 | /** | |
543 | * pch_udc_set_selfpowered() - Set the self power control | |
544 | * @dev: Reference to pch_udc_regs structure | |
545 | */ | |
546 | static inline void pch_udc_set_selfpowered(struct pch_udc_dev *dev) | |
547 | { | |
548 | pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_SP); | |
549 | } | |
550 | ||
551 | /** | |
552 | * pch_udc_set_disconnect() - Set the disconnect status. | |
553 | * @dev: Reference to pch_udc_regs structure | |
554 | */ | |
555 | static inline void pch_udc_set_disconnect(struct pch_udc_dev *dev) | |
556 | { | |
557 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD); | |
558 | } | |
559 | ||
560 | /** | |
561 | * pch_udc_clear_disconnect() - Clear the disconnect status. | |
562 | * @dev: Reference to pch_udc_regs structure | |
563 | */ | |
564 | static void pch_udc_clear_disconnect(struct pch_udc_dev *dev) | |
565 | { | |
566 | /* Clear the disconnect */ | |
567 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
568 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD); | |
569 | mdelay(1); | |
570 | /* Resume USB signalling */ | |
571 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
572 | } | |
573 | ||
1c575d2d TM |
574 | /** |
575 | * pch_udc_reconnect() - This API initializes usb device controller, | |
576 | * and clear the disconnect status. | |
577 | * @dev: Reference to pch_udc_regs structure | |
578 | */ | |
579 | static void pch_udc_init(struct pch_udc_dev *dev); | |
580 | static void pch_udc_reconnect(struct pch_udc_dev *dev) | |
581 | { | |
582 | pch_udc_init(dev); | |
583 | ||
584 | /* enable device interrupts */ | |
585 | /* pch_udc_enable_interrupts() */ | |
586 | pch_udc_bit_clr(dev, UDC_DEVIRQMSK_ADDR, | |
83331040 | 587 | UDC_DEVINT_UR | UDC_DEVINT_ENUM); |
1c575d2d TM |
588 | |
589 | /* Clear the disconnect */ | |
590 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
591 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD); | |
592 | mdelay(1); | |
593 | /* Resume USB signalling */ | |
594 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES); | |
595 | } | |
596 | ||
f646cf94 TO |
597 | /** |
598 | * pch_udc_vbus_session() - set or clearr the disconnect status. | |
599 | * @dev: Reference to pch_udc_regs structure | |
600 | * @is_active: Parameter specifying the action | |
601 | * 0: indicating VBUS power is ending | |
602 | * !0: indicating VBUS power is starting | |
603 | */ | |
604 | static inline void pch_udc_vbus_session(struct pch_udc_dev *dev, | |
605 | int is_active) | |
606 | { | |
1c575d2d TM |
607 | if (is_active) { |
608 | pch_udc_reconnect(dev); | |
609 | dev->vbus_session = 1; | |
610 | } else { | |
611 | if (dev->driver && dev->driver->disconnect) { | |
1c575d2d | 612 | spin_lock(&dev->lock); |
d3cb25a1 PM |
613 | dev->driver->disconnect(&dev->gadget); |
614 | spin_unlock(&dev->lock); | |
1c575d2d | 615 | } |
f646cf94 | 616 | pch_udc_set_disconnect(dev); |
1c575d2d TM |
617 | dev->vbus_session = 0; |
618 | } | |
f646cf94 TO |
619 | } |
620 | ||
621 | /** | |
622 | * pch_udc_ep_set_stall() - Set the stall of endpoint | |
623 | * @ep: Reference to structure of type pch_udc_ep_regs | |
624 | */ | |
625 | static void pch_udc_ep_set_stall(struct pch_udc_ep *ep) | |
626 | { | |
627 | if (ep->in) { | |
628 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_F); | |
629 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S); | |
630 | } else { | |
631 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S); | |
632 | } | |
633 | } | |
634 | ||
635 | /** | |
636 | * pch_udc_ep_clear_stall() - Clear the stall of endpoint | |
637 | * @ep: Reference to structure of type pch_udc_ep_regs | |
638 | */ | |
639 | static inline void pch_udc_ep_clear_stall(struct pch_udc_ep *ep) | |
640 | { | |
641 | /* Clear the stall */ | |
642 | pch_udc_ep_bit_clr(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S); | |
643 | /* Clear NAK by writing CNAK */ | |
644 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_CNAK); | |
645 | } | |
646 | ||
647 | /** | |
648 | * pch_udc_ep_set_trfr_type() - Set the transfer type of endpoint | |
649 | * @ep: Reference to structure of type pch_udc_ep_regs | |
650 | * @type: Type of endpoint | |
651 | */ | |
652 | static inline void pch_udc_ep_set_trfr_type(struct pch_udc_ep *ep, | |
653 | u8 type) | |
654 | { | |
655 | pch_udc_ep_writel(ep, ((type << UDC_EPCTL_ET_SHIFT) & | |
656 | UDC_EPCTL_ET_MASK), UDC_EPCTL_ADDR); | |
657 | } | |
658 | ||
659 | /** | |
660 | * pch_udc_ep_set_bufsz() - Set the maximum packet size for the endpoint | |
661 | * @ep: Reference to structure of type pch_udc_ep_regs | |
c17f459c | 662 | * @buf_size: The buffer word size |
f646cf94 TO |
663 | */ |
664 | static void pch_udc_ep_set_bufsz(struct pch_udc_ep *ep, | |
665 | u32 buf_size, u32 ep_in) | |
666 | { | |
667 | u32 data; | |
668 | if (ep_in) { | |
669 | data = pch_udc_ep_readl(ep, UDC_BUFIN_FRAMENUM_ADDR); | |
670 | data = (data & 0xffff0000) | (buf_size & 0xffff); | |
671 | pch_udc_ep_writel(ep, data, UDC_BUFIN_FRAMENUM_ADDR); | |
672 | } else { | |
673 | data = pch_udc_ep_readl(ep, UDC_BUFOUT_MAXPKT_ADDR); | |
674 | data = (buf_size << 16) | (data & 0xffff); | |
675 | pch_udc_ep_writel(ep, data, UDC_BUFOUT_MAXPKT_ADDR); | |
676 | } | |
677 | } | |
678 | ||
679 | /** | |
680 | * pch_udc_ep_set_maxpkt() - Set the Max packet size for the endpoint | |
681 | * @ep: Reference to structure of type pch_udc_ep_regs | |
c17f459c | 682 | * @pkt_size: The packet byte size |
f646cf94 TO |
683 | */ |
684 | static void pch_udc_ep_set_maxpkt(struct pch_udc_ep *ep, u32 pkt_size) | |
685 | { | |
686 | u32 data = pch_udc_ep_readl(ep, UDC_BUFOUT_MAXPKT_ADDR); | |
687 | data = (data & 0xffff0000) | (pkt_size & 0xffff); | |
688 | pch_udc_ep_writel(ep, data, UDC_BUFOUT_MAXPKT_ADDR); | |
689 | } | |
690 | ||
691 | /** | |
692 | * pch_udc_ep_set_subptr() - Set the Setup buffer pointer for the endpoint | |
693 | * @ep: Reference to structure of type pch_udc_ep_regs | |
694 | * @addr: Address of the register | |
695 | */ | |
696 | static inline void pch_udc_ep_set_subptr(struct pch_udc_ep *ep, u32 addr) | |
697 | { | |
698 | pch_udc_ep_writel(ep, addr, UDC_SUBPTR_ADDR); | |
699 | } | |
700 | ||
701 | /** | |
702 | * pch_udc_ep_set_ddptr() - Set the Data descriptor pointer for the endpoint | |
703 | * @ep: Reference to structure of type pch_udc_ep_regs | |
704 | * @addr: Address of the register | |
705 | */ | |
706 | static inline void pch_udc_ep_set_ddptr(struct pch_udc_ep *ep, u32 addr) | |
707 | { | |
708 | pch_udc_ep_writel(ep, addr, UDC_DESPTR_ADDR); | |
709 | } | |
710 | ||
711 | /** | |
712 | * pch_udc_ep_set_pd() - Set the poll demand bit for the endpoint | |
713 | * @ep: Reference to structure of type pch_udc_ep_regs | |
714 | */ | |
715 | static inline void pch_udc_ep_set_pd(struct pch_udc_ep *ep) | |
716 | { | |
717 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_P); | |
718 | } | |
719 | ||
720 | /** | |
721 | * pch_udc_ep_set_rrdy() - Set the receive ready bit for the endpoint | |
722 | * @ep: Reference to structure of type pch_udc_ep_regs | |
723 | */ | |
724 | static inline void pch_udc_ep_set_rrdy(struct pch_udc_ep *ep) | |
725 | { | |
726 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_RRDY); | |
727 | } | |
728 | ||
729 | /** | |
730 | * pch_udc_ep_clear_rrdy() - Clear the receive ready bit for the endpoint | |
731 | * @ep: Reference to structure of type pch_udc_ep_regs | |
732 | */ | |
733 | static inline void pch_udc_ep_clear_rrdy(struct pch_udc_ep *ep) | |
734 | { | |
735 | pch_udc_ep_bit_clr(ep, UDC_EPCTL_ADDR, UDC_EPCTL_RRDY); | |
736 | } | |
737 | ||
738 | /** | |
739 | * pch_udc_set_dma() - Set the 'TDE' or RDE bit of device control | |
740 | * register depending on the direction specified | |
741 | * @dev: Reference to structure of type pch_udc_regs | |
742 | * @dir: whether Tx or Rx | |
743 | * DMA_DIR_RX: Receive | |
744 | * DMA_DIR_TX: Transmit | |
745 | */ | |
746 | static inline void pch_udc_set_dma(struct pch_udc_dev *dev, int dir) | |
747 | { | |
748 | if (dir == DMA_DIR_RX) | |
749 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RDE); | |
750 | else if (dir == DMA_DIR_TX) | |
751 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_TDE); | |
752 | } | |
753 | ||
754 | /** | |
755 | * pch_udc_clear_dma() - Clear the 'TDE' or RDE bit of device control | |
756 | * register depending on the direction specified | |
757 | * @dev: Reference to structure of type pch_udc_regs | |
758 | * @dir: Whether Tx or Rx | |
759 | * DMA_DIR_RX: Receive | |
760 | * DMA_DIR_TX: Transmit | |
761 | */ | |
762 | static inline void pch_udc_clear_dma(struct pch_udc_dev *dev, int dir) | |
763 | { | |
764 | if (dir == DMA_DIR_RX) | |
765 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RDE); | |
766 | else if (dir == DMA_DIR_TX) | |
767 | pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_TDE); | |
768 | } | |
769 | ||
770 | /** | |
771 | * pch_udc_set_csr_done() - Set the device control register | |
772 | * CSR done field (bit 13) | |
773 | * @dev: reference to structure of type pch_udc_regs | |
774 | */ | |
775 | static inline void pch_udc_set_csr_done(struct pch_udc_dev *dev) | |
776 | { | |
777 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_CSR_DONE); | |
778 | } | |
779 | ||
780 | /** | |
781 | * pch_udc_disable_interrupts() - Disables the specified interrupts | |
782 | * @dev: Reference to structure of type pch_udc_regs | |
783 | * @mask: Mask to disable interrupts | |
784 | */ | |
785 | static inline void pch_udc_disable_interrupts(struct pch_udc_dev *dev, | |
786 | u32 mask) | |
787 | { | |
788 | pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, mask); | |
789 | } | |
790 | ||
791 | /** | |
792 | * pch_udc_enable_interrupts() - Enable the specified interrupts | |
793 | * @dev: Reference to structure of type pch_udc_regs | |
794 | * @mask: Mask to enable interrupts | |
795 | */ | |
796 | static inline void pch_udc_enable_interrupts(struct pch_udc_dev *dev, | |
797 | u32 mask) | |
798 | { | |
799 | pch_udc_bit_clr(dev, UDC_DEVIRQMSK_ADDR, mask); | |
800 | } | |
801 | ||
802 | /** | |
803 | * pch_udc_disable_ep_interrupts() - Disable endpoint interrupts | |
804 | * @dev: Reference to structure of type pch_udc_regs | |
805 | * @mask: Mask to disable interrupts | |
806 | */ | |
807 | static inline void pch_udc_disable_ep_interrupts(struct pch_udc_dev *dev, | |
808 | u32 mask) | |
809 | { | |
810 | pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, mask); | |
811 | } | |
812 | ||
813 | /** | |
814 | * pch_udc_enable_ep_interrupts() - Enable endpoint interrupts | |
815 | * @dev: Reference to structure of type pch_udc_regs | |
816 | * @mask: Mask to enable interrupts | |
817 | */ | |
818 | static inline void pch_udc_enable_ep_interrupts(struct pch_udc_dev *dev, | |
819 | u32 mask) | |
820 | { | |
821 | pch_udc_bit_clr(dev, UDC_EPIRQMSK_ADDR, mask); | |
822 | } | |
823 | ||
824 | /** | |
825 | * pch_udc_read_device_interrupts() - Read the device interrupts | |
826 | * @dev: Reference to structure of type pch_udc_regs | |
827 | * Retern The device interrupts | |
828 | */ | |
829 | static inline u32 pch_udc_read_device_interrupts(struct pch_udc_dev *dev) | |
830 | { | |
831 | return pch_udc_readl(dev, UDC_DEVIRQSTS_ADDR); | |
832 | } | |
833 | ||
834 | /** | |
835 | * pch_udc_write_device_interrupts() - Write device interrupts | |
836 | * @dev: Reference to structure of type pch_udc_regs | |
837 | * @val: The value to be written to interrupt register | |
838 | */ | |
839 | static inline void pch_udc_write_device_interrupts(struct pch_udc_dev *dev, | |
840 | u32 val) | |
841 | { | |
842 | pch_udc_writel(dev, val, UDC_DEVIRQSTS_ADDR); | |
843 | } | |
844 | ||
845 | /** | |
846 | * pch_udc_read_ep_interrupts() - Read the endpoint interrupts | |
847 | * @dev: Reference to structure of type pch_udc_regs | |
848 | * Retern The endpoint interrupt | |
849 | */ | |
850 | static inline u32 pch_udc_read_ep_interrupts(struct pch_udc_dev *dev) | |
851 | { | |
852 | return pch_udc_readl(dev, UDC_EPIRQSTS_ADDR); | |
853 | } | |
854 | ||
855 | /** | |
856 | * pch_udc_write_ep_interrupts() - Clear endpoint interupts | |
857 | * @dev: Reference to structure of type pch_udc_regs | |
858 | * @val: The value to be written to interrupt register | |
859 | */ | |
860 | static inline void pch_udc_write_ep_interrupts(struct pch_udc_dev *dev, | |
861 | u32 val) | |
862 | { | |
863 | pch_udc_writel(dev, val, UDC_EPIRQSTS_ADDR); | |
864 | } | |
865 | ||
866 | /** | |
867 | * pch_udc_read_device_status() - Read the device status | |
868 | * @dev: Reference to structure of type pch_udc_regs | |
869 | * Retern The device status | |
870 | */ | |
871 | static inline u32 pch_udc_read_device_status(struct pch_udc_dev *dev) | |
872 | { | |
873 | return pch_udc_readl(dev, UDC_DEVSTS_ADDR); | |
874 | } | |
875 | ||
876 | /** | |
877 | * pch_udc_read_ep_control() - Read the endpoint control | |
878 | * @ep: Reference to structure of type pch_udc_ep_regs | |
879 | * Retern The endpoint control register value | |
880 | */ | |
881 | static inline u32 pch_udc_read_ep_control(struct pch_udc_ep *ep) | |
882 | { | |
883 | return pch_udc_ep_readl(ep, UDC_EPCTL_ADDR); | |
884 | } | |
885 | ||
886 | /** | |
887 | * pch_udc_clear_ep_control() - Clear the endpoint control register | |
888 | * @ep: Reference to structure of type pch_udc_ep_regs | |
889 | * Retern The endpoint control register value | |
890 | */ | |
891 | static inline void pch_udc_clear_ep_control(struct pch_udc_ep *ep) | |
892 | { | |
893 | return pch_udc_ep_writel(ep, 0, UDC_EPCTL_ADDR); | |
894 | } | |
895 | ||
896 | /** | |
897 | * pch_udc_read_ep_status() - Read the endpoint status | |
898 | * @ep: Reference to structure of type pch_udc_ep_regs | |
899 | * Retern The endpoint status | |
900 | */ | |
901 | static inline u32 pch_udc_read_ep_status(struct pch_udc_ep *ep) | |
902 | { | |
903 | return pch_udc_ep_readl(ep, UDC_EPSTS_ADDR); | |
904 | } | |
905 | ||
906 | /** | |
907 | * pch_udc_clear_ep_status() - Clear the endpoint status | |
908 | * @ep: Reference to structure of type pch_udc_ep_regs | |
909 | * @stat: Endpoint status | |
910 | */ | |
911 | static inline void pch_udc_clear_ep_status(struct pch_udc_ep *ep, | |
912 | u32 stat) | |
913 | { | |
914 | return pch_udc_ep_writel(ep, stat, UDC_EPSTS_ADDR); | |
915 | } | |
916 | ||
917 | /** | |
918 | * pch_udc_ep_set_nak() - Set the bit 7 (SNAK field) | |
919 | * of the endpoint control register | |
920 | * @ep: Reference to structure of type pch_udc_ep_regs | |
921 | */ | |
922 | static inline void pch_udc_ep_set_nak(struct pch_udc_ep *ep) | |
923 | { | |
924 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_SNAK); | |
925 | } | |
926 | ||
927 | /** | |
928 | * pch_udc_ep_clear_nak() - Set the bit 8 (CNAK field) | |
929 | * of the endpoint control register | |
930 | * @ep: reference to structure of type pch_udc_ep_regs | |
931 | */ | |
932 | static void pch_udc_ep_clear_nak(struct pch_udc_ep *ep) | |
933 | { | |
934 | unsigned int loopcnt = 0; | |
935 | struct pch_udc_dev *dev = ep->dev; | |
936 | ||
937 | if (!(pch_udc_ep_readl(ep, UDC_EPCTL_ADDR) & UDC_EPCTL_NAK)) | |
938 | return; | |
939 | if (!ep->in) { | |
940 | loopcnt = 10000; | |
941 | while (!(pch_udc_read_ep_status(ep) & UDC_EPSTS_MRXFIFO_EMP) && | |
942 | --loopcnt) | |
943 | udelay(5); | |
944 | if (!loopcnt) | |
945 | dev_err(&dev->pdev->dev, "%s: RxFIFO not Empty\n", | |
946 | __func__); | |
947 | } | |
948 | loopcnt = 10000; | |
949 | while ((pch_udc_read_ep_control(ep) & UDC_EPCTL_NAK) && --loopcnt) { | |
950 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_CNAK); | |
951 | udelay(5); | |
952 | } | |
953 | if (!loopcnt) | |
954 | dev_err(&dev->pdev->dev, "%s: Clear NAK not set for ep%d%s\n", | |
955 | __func__, ep->num, (ep->in ? "in" : "out")); | |
956 | } | |
957 | ||
958 | /** | |
959 | * pch_udc_ep_fifo_flush() - Flush the endpoint fifo | |
960 | * @ep: reference to structure of type pch_udc_ep_regs | |
961 | * @dir: direction of endpoint | |
962 | * 0: endpoint is OUT | |
963 | * !0: endpoint is IN | |
964 | */ | |
965 | static void pch_udc_ep_fifo_flush(struct pch_udc_ep *ep, int dir) | |
966 | { | |
f646cf94 TO |
967 | if (dir) { /* IN ep */ |
968 | pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_F); | |
969 | return; | |
970 | } | |
f646cf94 TO |
971 | } |
972 | ||
973 | /** | |
974 | * pch_udc_ep_enable() - This api enables endpoint | |
975 | * @regs: Reference to structure pch_udc_ep_regs | |
976 | * @desc: endpoint descriptor | |
977 | */ | |
978 | static void pch_udc_ep_enable(struct pch_udc_ep *ep, | |
979 | struct pch_udc_cfg_data *cfg, | |
980 | const struct usb_endpoint_descriptor *desc) | |
981 | { | |
982 | u32 val = 0; | |
983 | u32 buff_size = 0; | |
984 | ||
985 | pch_udc_ep_set_trfr_type(ep, desc->bmAttributes); | |
986 | if (ep->in) | |
987 | buff_size = UDC_EPIN_BUFF_SIZE; | |
988 | else | |
989 | buff_size = UDC_EPOUT_BUFF_SIZE; | |
990 | pch_udc_ep_set_bufsz(ep, buff_size, ep->in); | |
29cc8897 | 991 | pch_udc_ep_set_maxpkt(ep, usb_endpoint_maxp(desc)); |
f646cf94 TO |
992 | pch_udc_ep_set_nak(ep); |
993 | pch_udc_ep_fifo_flush(ep, ep->in); | |
994 | /* Configure the endpoint */ | |
995 | val = ep->num << UDC_CSR_NE_NUM_SHIFT | ep->in << UDC_CSR_NE_DIR_SHIFT | | |
996 | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) << | |
997 | UDC_CSR_NE_TYPE_SHIFT) | | |
998 | (cfg->cur_cfg << UDC_CSR_NE_CFG_SHIFT) | | |
999 | (cfg->cur_intf << UDC_CSR_NE_INTF_SHIFT) | | |
1000 | (cfg->cur_alt << UDC_CSR_NE_ALT_SHIFT) | | |
29cc8897 | 1001 | usb_endpoint_maxp(desc) << UDC_CSR_NE_MAX_PKT_SHIFT; |
f646cf94 TO |
1002 | |
1003 | if (ep->in) | |
1004 | pch_udc_write_csr(ep->dev, val, UDC_EPIN_IDX(ep->num)); | |
1005 | else | |
1006 | pch_udc_write_csr(ep->dev, val, UDC_EPOUT_IDX(ep->num)); | |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * pch_udc_ep_disable() - This api disables endpoint | |
1011 | * @regs: Reference to structure pch_udc_ep_regs | |
1012 | */ | |
1013 | static void pch_udc_ep_disable(struct pch_udc_ep *ep) | |
1014 | { | |
1015 | if (ep->in) { | |
1016 | /* flush the fifo */ | |
1017 | pch_udc_ep_writel(ep, UDC_EPCTL_F, UDC_EPCTL_ADDR); | |
1018 | /* set NAK */ | |
1019 | pch_udc_ep_writel(ep, UDC_EPCTL_SNAK, UDC_EPCTL_ADDR); | |
1020 | pch_udc_ep_bit_set(ep, UDC_EPSTS_ADDR, UDC_EPSTS_IN); | |
1021 | } else { | |
1022 | /* set NAK */ | |
1023 | pch_udc_ep_writel(ep, UDC_EPCTL_SNAK, UDC_EPCTL_ADDR); | |
1024 | } | |
1025 | /* reset desc pointer */ | |
1026 | pch_udc_ep_writel(ep, 0, UDC_DESPTR_ADDR); | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * pch_udc_wait_ep_stall() - Wait EP stall. | |
1031 | * @dev: Reference to pch_udc_dev structure | |
1032 | */ | |
1033 | static void pch_udc_wait_ep_stall(struct pch_udc_ep *ep) | |
1034 | { | |
1035 | unsigned int count = 10000; | |
1036 | ||
1037 | /* Wait till idle */ | |
1038 | while ((pch_udc_read_ep_control(ep) & UDC_EPCTL_S) && --count) | |
1039 | udelay(5); | |
1040 | if (!count) | |
1041 | dev_err(&ep->dev->pdev->dev, "%s: wait error\n", __func__); | |
1042 | } | |
1043 | ||
1044 | /** | |
1045 | * pch_udc_init() - This API initializes usb device controller | |
1046 | * @dev: Rreference to pch_udc_regs structure | |
1047 | */ | |
1048 | static void pch_udc_init(struct pch_udc_dev *dev) | |
1049 | { | |
1050 | if (NULL == dev) { | |
1051 | pr_err("%s: Invalid address\n", __func__); | |
1052 | return; | |
1053 | } | |
1054 | /* Soft Reset and Reset PHY */ | |
1055 | pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR); | |
1056 | pch_udc_writel(dev, UDC_SRST | UDC_PSRST, UDC_SRST_ADDR); | |
1057 | mdelay(1); | |
1058 | pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR); | |
1059 | pch_udc_writel(dev, 0x00, UDC_SRST_ADDR); | |
1060 | mdelay(1); | |
1061 | /* mask and clear all device interrupts */ | |
1062 | pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, UDC_DEVINT_MSK); | |
1063 | pch_udc_bit_set(dev, UDC_DEVIRQSTS_ADDR, UDC_DEVINT_MSK); | |
1064 | ||
1065 | /* mask and clear all ep interrupts */ | |
1066 | pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, UDC_EPINT_MSK_DISABLE_ALL); | |
1067 | pch_udc_bit_set(dev, UDC_EPIRQSTS_ADDR, UDC_EPINT_MSK_DISABLE_ALL); | |
1068 | ||
1069 | /* enable dynamic CSR programmingi, self powered and device speed */ | |
1070 | if (speed_fs) | |
1071 | pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_CSR_PRG | | |
1072 | UDC_DEVCFG_SP | UDC_DEVCFG_SPD_FS); | |
1073 | else /* defaul high speed */ | |
1074 | pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_CSR_PRG | | |
1075 | UDC_DEVCFG_SP | UDC_DEVCFG_SPD_HS); | |
1076 | pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, | |
1077 | (PCH_UDC_THLEN << UDC_DEVCTL_THLEN_SHIFT) | | |
1078 | (PCH_UDC_BRLEN << UDC_DEVCTL_BRLEN_SHIFT) | | |
1079 | UDC_DEVCTL_MODE | UDC_DEVCTL_BREN | | |
1080 | UDC_DEVCTL_THE); | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * pch_udc_exit() - This API exit usb device controller | |
1085 | * @dev: Reference to pch_udc_regs structure | |
1086 | */ | |
1087 | static void pch_udc_exit(struct pch_udc_dev *dev) | |
1088 | { | |
1089 | /* mask all device interrupts */ | |
1090 | pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, UDC_DEVINT_MSK); | |
1091 | /* mask all ep interrupts */ | |
1092 | pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, UDC_EPINT_MSK_DISABLE_ALL); | |
1093 | /* put device in disconnected state */ | |
1094 | pch_udc_set_disconnect(dev); | |
1095 | } | |
1096 | ||
1097 | /** | |
1098 | * pch_udc_pcd_get_frame() - This API is invoked to get the current frame number | |
1099 | * @gadget: Reference to the gadget driver | |
1100 | * | |
1101 | * Return codes: | |
1102 | * 0: Success | |
1103 | * -EINVAL: If the gadget passed is NULL | |
1104 | */ | |
1105 | static int pch_udc_pcd_get_frame(struct usb_gadget *gadget) | |
1106 | { | |
1107 | struct pch_udc_dev *dev; | |
1108 | ||
1109 | if (!gadget) | |
1110 | return -EINVAL; | |
1111 | dev = container_of(gadget, struct pch_udc_dev, gadget); | |
1112 | return pch_udc_get_frame(dev); | |
1113 | } | |
1114 | ||
1115 | /** | |
1116 | * pch_udc_pcd_wakeup() - This API is invoked to initiate a remote wakeup | |
1117 | * @gadget: Reference to the gadget driver | |
1118 | * | |
1119 | * Return codes: | |
1120 | * 0: Success | |
1121 | * -EINVAL: If the gadget passed is NULL | |
1122 | */ | |
1123 | static int pch_udc_pcd_wakeup(struct usb_gadget *gadget) | |
1124 | { | |
1125 | struct pch_udc_dev *dev; | |
1126 | unsigned long flags; | |
1127 | ||
1128 | if (!gadget) | |
1129 | return -EINVAL; | |
1130 | dev = container_of(gadget, struct pch_udc_dev, gadget); | |
1131 | spin_lock_irqsave(&dev->lock, flags); | |
1132 | pch_udc_rmt_wakeup(dev); | |
1133 | spin_unlock_irqrestore(&dev->lock, flags); | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | /** | |
1138 | * pch_udc_pcd_selfpowered() - This API is invoked to specify whether the device | |
1139 | * is self powered or not | |
1140 | * @gadget: Reference to the gadget driver | |
1141 | * @value: Specifies self powered or not | |
1142 | * | |
1143 | * Return codes: | |
1144 | * 0: Success | |
1145 | * -EINVAL: If the gadget passed is NULL | |
1146 | */ | |
1147 | static int pch_udc_pcd_selfpowered(struct usb_gadget *gadget, int value) | |
1148 | { | |
1149 | struct pch_udc_dev *dev; | |
1150 | ||
1151 | if (!gadget) | |
1152 | return -EINVAL; | |
716013b0 | 1153 | gadget->is_selfpowered = (value != 0); |
f646cf94 TO |
1154 | dev = container_of(gadget, struct pch_udc_dev, gadget); |
1155 | if (value) | |
1156 | pch_udc_set_selfpowered(dev); | |
1157 | else | |
1158 | pch_udc_clear_selfpowered(dev); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | /** | |
1163 | * pch_udc_pcd_pullup() - This API is invoked to make the device | |
1164 | * visible/invisible to the host | |
1165 | * @gadget: Reference to the gadget driver | |
1166 | * @is_on: Specifies whether the pull up is made active or inactive | |
1167 | * | |
1168 | * Return codes: | |
1169 | * 0: Success | |
1170 | * -EINVAL: If the gadget passed is NULL | |
1171 | */ | |
1172 | static int pch_udc_pcd_pullup(struct usb_gadget *gadget, int is_on) | |
1173 | { | |
1174 | struct pch_udc_dev *dev; | |
1175 | ||
1176 | if (!gadget) | |
1177 | return -EINVAL; | |
1178 | dev = container_of(gadget, struct pch_udc_dev, gadget); | |
1c575d2d TM |
1179 | if (is_on) { |
1180 | pch_udc_reconnect(dev); | |
1181 | } else { | |
1182 | if (dev->driver && dev->driver->disconnect) { | |
1c575d2d | 1183 | spin_lock(&dev->lock); |
d3cb25a1 PM |
1184 | dev->driver->disconnect(&dev->gadget); |
1185 | spin_unlock(&dev->lock); | |
1c575d2d TM |
1186 | } |
1187 | pch_udc_set_disconnect(dev); | |
1188 | } | |
1189 | ||
f646cf94 TO |
1190 | return 0; |
1191 | } | |
1192 | ||
1193 | /** | |
1194 | * pch_udc_pcd_vbus_session() - This API is used by a driver for an external | |
1195 | * transceiver (or GPIO) that | |
1196 | * detects a VBUS power session starting/ending | |
1197 | * @gadget: Reference to the gadget driver | |
1198 | * @is_active: specifies whether the session is starting or ending | |
1199 | * | |
1200 | * Return codes: | |
1201 | * 0: Success | |
1202 | * -EINVAL: If the gadget passed is NULL | |
1203 | */ | |
1204 | static int pch_udc_pcd_vbus_session(struct usb_gadget *gadget, int is_active) | |
1205 | { | |
1206 | struct pch_udc_dev *dev; | |
1207 | ||
1208 | if (!gadget) | |
1209 | return -EINVAL; | |
1210 | dev = container_of(gadget, struct pch_udc_dev, gadget); | |
1211 | pch_udc_vbus_session(dev, is_active); | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * pch_udc_pcd_vbus_draw() - This API is used by gadget drivers during | |
1217 | * SET_CONFIGURATION calls to | |
1218 | * specify how much power the device can consume | |
1219 | * @gadget: Reference to the gadget driver | |
1220 | * @mA: specifies the current limit in 2mA unit | |
1221 | * | |
1222 | * Return codes: | |
1223 | * -EINVAL: If the gadget passed is NULL | |
1224 | * -EOPNOTSUPP: | |
1225 | */ | |
1226 | static int pch_udc_pcd_vbus_draw(struct usb_gadget *gadget, unsigned int mA) | |
1227 | { | |
1228 | return -EOPNOTSUPP; | |
1229 | } | |
1230 | ||
1fb3b1cf FB |
1231 | static int pch_udc_start(struct usb_gadget *g, |
1232 | struct usb_gadget_driver *driver); | |
22835b80 FB |
1233 | static int pch_udc_stop(struct usb_gadget *g); |
1234 | ||
f646cf94 TO |
1235 | static const struct usb_gadget_ops pch_udc_ops = { |
1236 | .get_frame = pch_udc_pcd_get_frame, | |
1237 | .wakeup = pch_udc_pcd_wakeup, | |
1238 | .set_selfpowered = pch_udc_pcd_selfpowered, | |
1239 | .pullup = pch_udc_pcd_pullup, | |
1240 | .vbus_session = pch_udc_pcd_vbus_session, | |
1241 | .vbus_draw = pch_udc_pcd_vbus_draw, | |
1fb3b1cf FB |
1242 | .udc_start = pch_udc_start, |
1243 | .udc_stop = pch_udc_stop, | |
f646cf94 TO |
1244 | }; |
1245 | ||
dd63180b TM |
1246 | /** |
1247 | * pch_vbus_gpio_get_value() - This API gets value of GPIO port as VBUS status. | |
1248 | * @dev: Reference to the driver structure | |
1249 | * | |
1250 | * Return value: | |
1251 | * 1: VBUS is high | |
1252 | * 0: VBUS is low | |
1253 | * -1: It is not enable to detect VBUS using GPIO | |
1254 | */ | |
1255 | static int pch_vbus_gpio_get_value(struct pch_udc_dev *dev) | |
1256 | { | |
1257 | int vbus = 0; | |
1258 | ||
1259 | if (dev->vbus_gpio.port) | |
1260 | vbus = gpio_get_value(dev->vbus_gpio.port) ? 1 : 0; | |
1261 | else | |
1262 | vbus = -1; | |
1263 | ||
1264 | return vbus; | |
1265 | } | |
1266 | ||
1267 | /** | |
1268 | * pch_vbus_gpio_work_fall() - This API keeps watch on VBUS becoming Low. | |
1269 | * If VBUS is Low, disconnect is processed | |
1270 | * @irq_work: Structure for WorkQueue | |
1271 | * | |
1272 | */ | |
1273 | static void pch_vbus_gpio_work_fall(struct work_struct *irq_work) | |
1274 | { | |
1275 | struct pch_vbus_gpio_data *vbus_gpio = container_of(irq_work, | |
1276 | struct pch_vbus_gpio_data, irq_work_fall); | |
1277 | struct pch_udc_dev *dev = | |
1278 | container_of(vbus_gpio, struct pch_udc_dev, vbus_gpio); | |
1279 | int vbus_saved = -1; | |
1280 | int vbus; | |
1281 | int count; | |
1282 | ||
1283 | if (!dev->vbus_gpio.port) | |
1284 | return; | |
1285 | ||
1286 | for (count = 0; count < (PCH_VBUS_PERIOD / PCH_VBUS_INTERVAL); | |
1287 | count++) { | |
1288 | vbus = pch_vbus_gpio_get_value(dev); | |
1289 | ||
1290 | if ((vbus_saved == vbus) && (vbus == 0)) { | |
1291 | dev_dbg(&dev->pdev->dev, "VBUS fell"); | |
1292 | if (dev->driver | |
1293 | && dev->driver->disconnect) { | |
1294 | dev->driver->disconnect( | |
1295 | &dev->gadget); | |
1296 | } | |
637b78eb TM |
1297 | if (dev->vbus_gpio.intr) |
1298 | pch_udc_init(dev); | |
1299 | else | |
1300 | pch_udc_reconnect(dev); | |
dd63180b TM |
1301 | return; |
1302 | } | |
1303 | vbus_saved = vbus; | |
1304 | mdelay(PCH_VBUS_INTERVAL); | |
1305 | } | |
1306 | } | |
1307 | ||
637b78eb TM |
1308 | /** |
1309 | * pch_vbus_gpio_work_rise() - This API checks VBUS is High. | |
1310 | * If VBUS is High, connect is processed | |
1311 | * @irq_work: Structure for WorkQueue | |
1312 | * | |
1313 | */ | |
1314 | static void pch_vbus_gpio_work_rise(struct work_struct *irq_work) | |
1315 | { | |
1316 | struct pch_vbus_gpio_data *vbus_gpio = container_of(irq_work, | |
1317 | struct pch_vbus_gpio_data, irq_work_rise); | |
1318 | struct pch_udc_dev *dev = | |
1319 | container_of(vbus_gpio, struct pch_udc_dev, vbus_gpio); | |
1320 | int vbus; | |
1321 | ||
1322 | if (!dev->vbus_gpio.port) | |
1323 | return; | |
1324 | ||
1325 | mdelay(PCH_VBUS_INTERVAL); | |
1326 | vbus = pch_vbus_gpio_get_value(dev); | |
1327 | ||
1328 | if (vbus == 1) { | |
1329 | dev_dbg(&dev->pdev->dev, "VBUS rose"); | |
1330 | pch_udc_reconnect(dev); | |
1331 | return; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | /** | |
1336 | * pch_vbus_gpio_irq() - IRQ handler for GPIO intrerrupt for changing VBUS | |
1337 | * @irq: Interrupt request number | |
1338 | * @dev: Reference to the device structure | |
1339 | * | |
1340 | * Return codes: | |
1341 | * 0: Success | |
1342 | * -EINVAL: GPIO port is invalid or can't be initialized. | |
1343 | */ | |
1344 | static irqreturn_t pch_vbus_gpio_irq(int irq, void *data) | |
1345 | { | |
1346 | struct pch_udc_dev *dev = (struct pch_udc_dev *)data; | |
1347 | ||
1348 | if (!dev->vbus_gpio.port || !dev->vbus_gpio.intr) | |
1349 | return IRQ_NONE; | |
1350 | ||
1351 | if (pch_vbus_gpio_get_value(dev)) | |
1352 | schedule_work(&dev->vbus_gpio.irq_work_rise); | |
1353 | else | |
1354 | schedule_work(&dev->vbus_gpio.irq_work_fall); | |
1355 | ||
1356 | return IRQ_HANDLED; | |
1357 | } | |
1358 | ||
dd63180b TM |
1359 | /** |
1360 | * pch_vbus_gpio_init() - This API initializes GPIO port detecting VBUS. | |
1361 | * @dev: Reference to the driver structure | |
1362 | * @vbus_gpio Number of GPIO port to detect gpio | |
1363 | * | |
1364 | * Return codes: | |
1365 | * 0: Success | |
1366 | * -EINVAL: GPIO port is invalid or can't be initialized. | |
1367 | */ | |
1368 | static int pch_vbus_gpio_init(struct pch_udc_dev *dev, int vbus_gpio_port) | |
1369 | { | |
1370 | int err; | |
637b78eb | 1371 | int irq_num = 0; |
dd63180b TM |
1372 | |
1373 | dev->vbus_gpio.port = 0; | |
637b78eb | 1374 | dev->vbus_gpio.intr = 0; |
dd63180b TM |
1375 | |
1376 | if (vbus_gpio_port <= -1) | |
1377 | return -EINVAL; | |
1378 | ||
1379 | err = gpio_is_valid(vbus_gpio_port); | |
1380 | if (!err) { | |
1381 | pr_err("%s: gpio port %d is invalid\n", | |
1382 | __func__, vbus_gpio_port); | |
1383 | return -EINVAL; | |
1384 | } | |
1385 | ||
1386 | err = gpio_request(vbus_gpio_port, "pch_vbus"); | |
1387 | if (err) { | |
1388 | pr_err("%s: can't request gpio port %d, err: %d\n", | |
1389 | __func__, vbus_gpio_port, err); | |
1390 | return -EINVAL; | |
1391 | } | |
1392 | ||
1393 | dev->vbus_gpio.port = vbus_gpio_port; | |
1394 | gpio_direction_input(vbus_gpio_port); | |
1395 | INIT_WORK(&dev->vbus_gpio.irq_work_fall, pch_vbus_gpio_work_fall); | |
1396 | ||
637b78eb TM |
1397 | irq_num = gpio_to_irq(vbus_gpio_port); |
1398 | if (irq_num > 0) { | |
1399 | irq_set_irq_type(irq_num, IRQ_TYPE_EDGE_BOTH); | |
1400 | err = request_irq(irq_num, pch_vbus_gpio_irq, 0, | |
1401 | "vbus_detect", dev); | |
1402 | if (!err) { | |
1403 | dev->vbus_gpio.intr = irq_num; | |
1404 | INIT_WORK(&dev->vbus_gpio.irq_work_rise, | |
1405 | pch_vbus_gpio_work_rise); | |
1406 | } else { | |
1407 | pr_err("%s: can't request irq %d, err: %d\n", | |
1408 | __func__, irq_num, err); | |
1409 | } | |
1410 | } | |
1411 | ||
dd63180b TM |
1412 | return 0; |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * pch_vbus_gpio_free() - This API frees resources of GPIO port | |
1417 | * @dev: Reference to the driver structure | |
1418 | */ | |
1419 | static void pch_vbus_gpio_free(struct pch_udc_dev *dev) | |
1420 | { | |
637b78eb TM |
1421 | if (dev->vbus_gpio.intr) |
1422 | free_irq(dev->vbus_gpio.intr, dev); | |
1423 | ||
dd63180b TM |
1424 | if (dev->vbus_gpio.port) |
1425 | gpio_free(dev->vbus_gpio.port); | |
1426 | } | |
1427 | ||
f646cf94 TO |
1428 | /** |
1429 | * complete_req() - This API is invoked from the driver when processing | |
1430 | * of a request is complete | |
1431 | * @ep: Reference to the endpoint structure | |
1432 | * @req: Reference to the request structure | |
1433 | * @status: Indicates the success/failure of completion | |
1434 | */ | |
1435 | static void complete_req(struct pch_udc_ep *ep, struct pch_udc_request *req, | |
1436 | int status) | |
3f8b6201 FB |
1437 | __releases(&dev->lock) |
1438 | __acquires(&dev->lock) | |
f646cf94 TO |
1439 | { |
1440 | struct pch_udc_dev *dev; | |
1441 | unsigned halted = ep->halted; | |
1442 | ||
1443 | list_del_init(&req->queue); | |
1444 | ||
1445 | /* set new status if pending */ | |
1446 | if (req->req.status == -EINPROGRESS) | |
1447 | req->req.status = status; | |
1448 | else | |
1449 | status = req->req.status; | |
1450 | ||
1451 | dev = ep->dev; | |
1452 | if (req->dma_mapped) { | |
c17f459c TO |
1453 | if (req->dma == DMA_ADDR_INVALID) { |
1454 | if (ep->in) | |
1455 | dma_unmap_single(&dev->pdev->dev, req->req.dma, | |
1456 | req->req.length, | |
1457 | DMA_TO_DEVICE); | |
1458 | else | |
1459 | dma_unmap_single(&dev->pdev->dev, req->req.dma, | |
1460 | req->req.length, | |
1461 | DMA_FROM_DEVICE); | |
1462 | req->req.dma = DMA_ADDR_INVALID; | |
1463 | } else { | |
1464 | if (ep->in) | |
1465 | dma_unmap_single(&dev->pdev->dev, req->dma, | |
1466 | req->req.length, | |
1467 | DMA_TO_DEVICE); | |
1468 | else { | |
1469 | dma_unmap_single(&dev->pdev->dev, req->dma, | |
1470 | req->req.length, | |
1471 | DMA_FROM_DEVICE); | |
1472 | memcpy(req->req.buf, req->buf, req->req.length); | |
1473 | } | |
1474 | kfree(req->buf); | |
1475 | req->dma = DMA_ADDR_INVALID; | |
1476 | } | |
f646cf94 | 1477 | req->dma_mapped = 0; |
f646cf94 TO |
1478 | } |
1479 | ep->halted = 1; | |
1d23d16a | 1480 | spin_unlock(&dev->lock); |
f646cf94 TO |
1481 | if (!ep->in) |
1482 | pch_udc_ep_clear_rrdy(ep); | |
304f7e5e | 1483 | usb_gadget_giveback_request(&ep->ep, &req->req); |
1d23d16a | 1484 | spin_lock(&dev->lock); |
f646cf94 TO |
1485 | ep->halted = halted; |
1486 | } | |
1487 | ||
1488 | /** | |
1489 | * empty_req_queue() - This API empties the request queue of an endpoint | |
1490 | * @ep: Reference to the endpoint structure | |
1491 | */ | |
1492 | static void empty_req_queue(struct pch_udc_ep *ep) | |
1493 | { | |
1494 | struct pch_udc_request *req; | |
1495 | ||
1496 | ep->halted = 1; | |
1497 | while (!list_empty(&ep->queue)) { | |
1498 | req = list_entry(ep->queue.next, struct pch_udc_request, queue); | |
1499 | complete_req(ep, req, -ESHUTDOWN); /* Remove from list */ | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | /** | |
1504 | * pch_udc_free_dma_chain() - This function frees the DMA chain created | |
1505 | * for the request | |
1506 | * @dev Reference to the driver structure | |
1507 | * @req Reference to the request to be freed | |
1508 | * | |
1509 | * Return codes: | |
1510 | * 0: Success | |
1511 | */ | |
1512 | static void pch_udc_free_dma_chain(struct pch_udc_dev *dev, | |
1513 | struct pch_udc_request *req) | |
1514 | { | |
1515 | struct pch_udc_data_dma_desc *td = req->td_data; | |
1516 | unsigned i = req->chain_len; | |
1517 | ||
c17f459c TO |
1518 | dma_addr_t addr2; |
1519 | dma_addr_t addr = (dma_addr_t)td->next; | |
1520 | td->next = 0x00; | |
f646cf94 | 1521 | for (; i > 1; --i) { |
f646cf94 TO |
1522 | /* do not free first desc., will be done by free for request */ |
1523 | td = phys_to_virt(addr); | |
c17f459c | 1524 | addr2 = (dma_addr_t)td->next; |
f646cf94 | 1525 | pci_pool_free(dev->data_requests, td, addr); |
c17f459c | 1526 | addr = addr2; |
f646cf94 | 1527 | } |
c17f459c | 1528 | req->chain_len = 1; |
f646cf94 TO |
1529 | } |
1530 | ||
1531 | /** | |
1532 | * pch_udc_create_dma_chain() - This function creates or reinitializes | |
1533 | * a DMA chain | |
1534 | * @ep: Reference to the endpoint structure | |
1535 | * @req: Reference to the request | |
1536 | * @buf_len: The buffer length | |
1537 | * @gfp_flags: Flags to be used while mapping the data buffer | |
1538 | * | |
1539 | * Return codes: | |
1540 | * 0: success, | |
1541 | * -ENOMEM: pci_pool_alloc invocation fails | |
1542 | */ | |
1543 | static int pch_udc_create_dma_chain(struct pch_udc_ep *ep, | |
1544 | struct pch_udc_request *req, | |
1545 | unsigned long buf_len, | |
1546 | gfp_t gfp_flags) | |
1547 | { | |
1548 | struct pch_udc_data_dma_desc *td = req->td_data, *last; | |
1549 | unsigned long bytes = req->req.length, i = 0; | |
1550 | dma_addr_t dma_addr; | |
1551 | unsigned len = 1; | |
1552 | ||
1553 | if (req->chain_len > 1) | |
1554 | pch_udc_free_dma_chain(ep->dev, req); | |
1555 | ||
c17f459c TO |
1556 | if (req->dma == DMA_ADDR_INVALID) |
1557 | td->dataptr = req->req.dma; | |
1558 | else | |
1559 | td->dataptr = req->dma; | |
f646cf94 | 1560 | |
c17f459c TO |
1561 | td->status = PCH_UDC_BS_HST_BSY; |
1562 | for (; ; bytes -= buf_len, ++len) { | |
1563 | td->status = PCH_UDC_BS_HST_BSY | min(buf_len, bytes); | |
f646cf94 TO |
1564 | if (bytes <= buf_len) |
1565 | break; | |
f646cf94 TO |
1566 | last = td; |
1567 | td = pci_pool_alloc(ep->dev->data_requests, gfp_flags, | |
1568 | &dma_addr); | |
1569 | if (!td) | |
1570 | goto nomem; | |
f646cf94 | 1571 | i += buf_len; |
c17f459c | 1572 | td->dataptr = req->td_data->dataptr + i; |
f646cf94 TO |
1573 | last->next = dma_addr; |
1574 | } | |
1575 | ||
1576 | req->td_data_last = td; | |
1577 | td->status |= PCH_UDC_DMA_LAST; | |
1578 | td->next = req->td_data_phys; | |
1579 | req->chain_len = len; | |
1580 | return 0; | |
1581 | ||
1582 | nomem: | |
1583 | if (len > 1) { | |
1584 | req->chain_len = len; | |
1585 | pch_udc_free_dma_chain(ep->dev, req); | |
1586 | } | |
1587 | req->chain_len = 1; | |
1588 | return -ENOMEM; | |
1589 | } | |
1590 | ||
1591 | /** | |
1592 | * prepare_dma() - This function creates and initializes the DMA chain | |
1593 | * for the request | |
1594 | * @ep: Reference to the endpoint structure | |
1595 | * @req: Reference to the request | |
1596 | * @gfp: Flag to be used while mapping the data buffer | |
1597 | * | |
1598 | * Return codes: | |
1599 | * 0: Success | |
1600 | * Other 0: linux error number on failure | |
1601 | */ | |
1602 | static int prepare_dma(struct pch_udc_ep *ep, struct pch_udc_request *req, | |
1603 | gfp_t gfp) | |
1604 | { | |
1605 | int retval; | |
1606 | ||
f646cf94 TO |
1607 | /* Allocate and create a DMA chain */ |
1608 | retval = pch_udc_create_dma_chain(ep, req, ep->ep.maxpacket, gfp); | |
1609 | if (retval) { | |
c17f459c | 1610 | pr_err("%s: could not create DMA chain:%d\n", __func__, retval); |
f646cf94 TO |
1611 | return retval; |
1612 | } | |
c17f459c | 1613 | if (ep->in) |
f646cf94 | 1614 | req->td_data->status = (req->td_data->status & |
c17f459c | 1615 | ~PCH_UDC_BUFF_STS) | PCH_UDC_BS_HST_RDY; |
f646cf94 TO |
1616 | return 0; |
1617 | } | |
1618 | ||
1619 | /** | |
1620 | * process_zlp() - This function process zero length packets | |
1621 | * from the gadget driver | |
1622 | * @ep: Reference to the endpoint structure | |
1623 | * @req: Reference to the request | |
1624 | */ | |
1625 | static void process_zlp(struct pch_udc_ep *ep, struct pch_udc_request *req) | |
1626 | { | |
1627 | struct pch_udc_dev *dev = ep->dev; | |
1628 | ||
1629 | /* IN zlp's are handled by hardware */ | |
1630 | complete_req(ep, req, 0); | |
1631 | ||
1632 | /* if set_config or set_intf is waiting for ack by zlp | |
1633 | * then set CSR_DONE | |
1634 | */ | |
1635 | if (dev->set_cfg_not_acked) { | |
1636 | pch_udc_set_csr_done(dev); | |
1637 | dev->set_cfg_not_acked = 0; | |
1638 | } | |
1639 | /* setup command is ACK'ed now by zlp */ | |
1640 | if (!dev->stall && dev->waiting_zlp_ack) { | |
1641 | pch_udc_ep_clear_nak(&(dev->ep[UDC_EP0IN_IDX])); | |
1642 | dev->waiting_zlp_ack = 0; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /** | |
1647 | * pch_udc_start_rxrequest() - This function starts the receive requirement. | |
1648 | * @ep: Reference to the endpoint structure | |
1649 | * @req: Reference to the request structure | |
1650 | */ | |
1651 | static void pch_udc_start_rxrequest(struct pch_udc_ep *ep, | |
1652 | struct pch_udc_request *req) | |
1653 | { | |
1654 | struct pch_udc_data_dma_desc *td_data; | |
1655 | ||
1656 | pch_udc_clear_dma(ep->dev, DMA_DIR_RX); | |
1657 | td_data = req->td_data; | |
f646cf94 TO |
1658 | /* Set the status bits for all descriptors */ |
1659 | while (1) { | |
1660 | td_data->status = (td_data->status & ~PCH_UDC_BUFF_STS) | | |
1661 | PCH_UDC_BS_HST_RDY; | |
1662 | if ((td_data->status & PCH_UDC_DMA_LAST) == PCH_UDC_DMA_LAST) | |
1663 | break; | |
1664 | td_data = phys_to_virt(td_data->next); | |
1665 | } | |
1666 | /* Write the descriptor pointer */ | |
1667 | pch_udc_ep_set_ddptr(ep, req->td_data_phys); | |
1668 | req->dma_going = 1; | |
1669 | pch_udc_enable_ep_interrupts(ep->dev, UDC_EPINT_OUT_EP0 << ep->num); | |
1670 | pch_udc_set_dma(ep->dev, DMA_DIR_RX); | |
1671 | pch_udc_ep_clear_nak(ep); | |
1672 | pch_udc_ep_set_rrdy(ep); | |
1673 | } | |
1674 | ||
1675 | /** | |
1676 | * pch_udc_pcd_ep_enable() - This API enables the endpoint. It is called | |
1677 | * from gadget driver | |
1678 | * @usbep: Reference to the USB endpoint structure | |
1679 | * @desc: Reference to the USB endpoint descriptor structure | |
1680 | * | |
1681 | * Return codes: | |
1682 | * 0: Success | |
1683 | * -EINVAL: | |
1684 | * -ESHUTDOWN: | |
1685 | */ | |
1686 | static int pch_udc_pcd_ep_enable(struct usb_ep *usbep, | |
1687 | const struct usb_endpoint_descriptor *desc) | |
1688 | { | |
1689 | struct pch_udc_ep *ep; | |
1690 | struct pch_udc_dev *dev; | |
1691 | unsigned long iflags; | |
1692 | ||
1693 | if (!usbep || (usbep->name == ep0_string) || !desc || | |
1694 | (desc->bDescriptorType != USB_DT_ENDPOINT) || !desc->wMaxPacketSize) | |
1695 | return -EINVAL; | |
1696 | ||
1697 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
1698 | dev = ep->dev; | |
1699 | if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
1700 | return -ESHUTDOWN; | |
1701 | spin_lock_irqsave(&dev->lock, iflags); | |
0ff21e0e | 1702 | ep->ep.desc = desc; |
f646cf94 TO |
1703 | ep->halted = 0; |
1704 | pch_udc_ep_enable(ep, &ep->dev->cfg_data, desc); | |
29cc8897 | 1705 | ep->ep.maxpacket = usb_endpoint_maxp(desc); |
f646cf94 TO |
1706 | pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num)); |
1707 | spin_unlock_irqrestore(&dev->lock, iflags); | |
1708 | return 0; | |
1709 | } | |
1710 | ||
1711 | /** | |
1712 | * pch_udc_pcd_ep_disable() - This API disables endpoint and is called | |
1713 | * from gadget driver | |
1714 | * @usbep Reference to the USB endpoint structure | |
1715 | * | |
1716 | * Return codes: | |
1717 | * 0: Success | |
1718 | * -EINVAL: | |
1719 | */ | |
1720 | static int pch_udc_pcd_ep_disable(struct usb_ep *usbep) | |
1721 | { | |
1722 | struct pch_udc_ep *ep; | |
f646cf94 TO |
1723 | unsigned long iflags; |
1724 | ||
1725 | if (!usbep) | |
1726 | return -EINVAL; | |
1727 | ||
1728 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
0ff21e0e | 1729 | if ((usbep->name == ep0_string) || !ep->ep.desc) |
f646cf94 TO |
1730 | return -EINVAL; |
1731 | ||
1732 | spin_lock_irqsave(&ep->dev->lock, iflags); | |
1733 | empty_req_queue(ep); | |
1734 | ep->halted = 1; | |
1735 | pch_udc_ep_disable(ep); | |
1736 | pch_udc_disable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num)); | |
f9c56cdd | 1737 | ep->ep.desc = NULL; |
f646cf94 TO |
1738 | INIT_LIST_HEAD(&ep->queue); |
1739 | spin_unlock_irqrestore(&ep->dev->lock, iflags); | |
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | /** | |
1744 | * pch_udc_alloc_request() - This function allocates request structure. | |
1745 | * It is called by gadget driver | |
1746 | * @usbep: Reference to the USB endpoint structure | |
1747 | * @gfp: Flag to be used while allocating memory | |
1748 | * | |
1749 | * Return codes: | |
1750 | * NULL: Failure | |
1751 | * Allocated address: Success | |
1752 | */ | |
1753 | static struct usb_request *pch_udc_alloc_request(struct usb_ep *usbep, | |
1754 | gfp_t gfp) | |
1755 | { | |
1756 | struct pch_udc_request *req; | |
1757 | struct pch_udc_ep *ep; | |
1758 | struct pch_udc_data_dma_desc *dma_desc; | |
f646cf94 TO |
1759 | |
1760 | if (!usbep) | |
1761 | return NULL; | |
1762 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
f646cf94 TO |
1763 | req = kzalloc(sizeof *req, gfp); |
1764 | if (!req) | |
1765 | return NULL; | |
1766 | req->req.dma = DMA_ADDR_INVALID; | |
c17f459c | 1767 | req->dma = DMA_ADDR_INVALID; |
f646cf94 TO |
1768 | INIT_LIST_HEAD(&req->queue); |
1769 | if (!ep->dev->dma_addr) | |
1770 | return &req->req; | |
1771 | /* ep0 in requests are allocated from data pool here */ | |
1772 | dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp, | |
1773 | &req->td_data_phys); | |
1774 | if (NULL == dma_desc) { | |
1775 | kfree(req); | |
1776 | return NULL; | |
1777 | } | |
1778 | /* prevent from using desc. - set HOST BUSY */ | |
1779 | dma_desc->status |= PCH_UDC_BS_HST_BSY; | |
b5c03bff | 1780 | dma_desc->dataptr = cpu_to_le32(DMA_ADDR_INVALID); |
f646cf94 TO |
1781 | req->td_data = dma_desc; |
1782 | req->td_data_last = dma_desc; | |
1783 | req->chain_len = 1; | |
1784 | return &req->req; | |
1785 | } | |
1786 | ||
1787 | /** | |
1788 | * pch_udc_free_request() - This function frees request structure. | |
1789 | * It is called by gadget driver | |
1790 | * @usbep: Reference to the USB endpoint structure | |
1791 | * @usbreq: Reference to the USB request | |
1792 | */ | |
1793 | static void pch_udc_free_request(struct usb_ep *usbep, | |
1794 | struct usb_request *usbreq) | |
1795 | { | |
1796 | struct pch_udc_ep *ep; | |
1797 | struct pch_udc_request *req; | |
1798 | struct pch_udc_dev *dev; | |
1799 | ||
1800 | if (!usbep || !usbreq) | |
1801 | return; | |
1802 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
1803 | req = container_of(usbreq, struct pch_udc_request, req); | |
1804 | dev = ep->dev; | |
1805 | if (!list_empty(&req->queue)) | |
1806 | dev_err(&dev->pdev->dev, "%s: %s req=0x%p queue not empty\n", | |
1807 | __func__, usbep->name, req); | |
1808 | if (req->td_data != NULL) { | |
1809 | if (req->chain_len > 1) | |
1810 | pch_udc_free_dma_chain(ep->dev, req); | |
1811 | pci_pool_free(ep->dev->data_requests, req->td_data, | |
1812 | req->td_data_phys); | |
1813 | } | |
1814 | kfree(req); | |
1815 | } | |
1816 | ||
1817 | /** | |
1818 | * pch_udc_pcd_queue() - This function queues a request packet. It is called | |
1819 | * by gadget driver | |
1820 | * @usbep: Reference to the USB endpoint structure | |
1821 | * @usbreq: Reference to the USB request | |
1822 | * @gfp: Flag to be used while mapping the data buffer | |
1823 | * | |
1824 | * Return codes: | |
1825 | * 0: Success | |
1826 | * linux error number: Failure | |
1827 | */ | |
1828 | static int pch_udc_pcd_queue(struct usb_ep *usbep, struct usb_request *usbreq, | |
1829 | gfp_t gfp) | |
1830 | { | |
1831 | int retval = 0; | |
1832 | struct pch_udc_ep *ep; | |
1833 | struct pch_udc_dev *dev; | |
1834 | struct pch_udc_request *req; | |
1835 | unsigned long iflags; | |
1836 | ||
1837 | if (!usbep || !usbreq || !usbreq->complete || !usbreq->buf) | |
1838 | return -EINVAL; | |
1839 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
1840 | dev = ep->dev; | |
0ff21e0e | 1841 | if (!ep->ep.desc && ep->num) |
f646cf94 TO |
1842 | return -EINVAL; |
1843 | req = container_of(usbreq, struct pch_udc_request, req); | |
1844 | if (!list_empty(&req->queue)) | |
1845 | return -EINVAL; | |
1846 | if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
1847 | return -ESHUTDOWN; | |
48570711 | 1848 | spin_lock_irqsave(&dev->lock, iflags); |
f646cf94 TO |
1849 | /* map the buffer for dma */ |
1850 | if (usbreq->length && | |
1851 | ((usbreq->dma == DMA_ADDR_INVALID) || !usbreq->dma)) { | |
c17f459c TO |
1852 | if (!((unsigned long)(usbreq->buf) & 0x03)) { |
1853 | if (ep->in) | |
1854 | usbreq->dma = dma_map_single(&dev->pdev->dev, | |
1855 | usbreq->buf, | |
1856 | usbreq->length, | |
1857 | DMA_TO_DEVICE); | |
1858 | else | |
1859 | usbreq->dma = dma_map_single(&dev->pdev->dev, | |
1860 | usbreq->buf, | |
1861 | usbreq->length, | |
1862 | DMA_FROM_DEVICE); | |
1863 | } else { | |
1864 | req->buf = kzalloc(usbreq->length, GFP_ATOMIC); | |
48570711 DC |
1865 | if (!req->buf) { |
1866 | retval = -ENOMEM; | |
1867 | goto probe_end; | |
1868 | } | |
c17f459c TO |
1869 | if (ep->in) { |
1870 | memcpy(req->buf, usbreq->buf, usbreq->length); | |
1871 | req->dma = dma_map_single(&dev->pdev->dev, | |
1872 | req->buf, | |
1873 | usbreq->length, | |
1874 | DMA_TO_DEVICE); | |
1875 | } else | |
1876 | req->dma = dma_map_single(&dev->pdev->dev, | |
1877 | req->buf, | |
1878 | usbreq->length, | |
1879 | DMA_FROM_DEVICE); | |
1880 | } | |
f646cf94 TO |
1881 | req->dma_mapped = 1; |
1882 | } | |
1883 | if (usbreq->length > 0) { | |
abab0c67 | 1884 | retval = prepare_dma(ep, req, GFP_ATOMIC); |
f646cf94 TO |
1885 | if (retval) |
1886 | goto probe_end; | |
1887 | } | |
1888 | usbreq->actual = 0; | |
1889 | usbreq->status = -EINPROGRESS; | |
1890 | req->dma_done = 0; | |
1891 | if (list_empty(&ep->queue) && !ep->halted) { | |
1892 | /* no pending transfer, so start this req */ | |
1893 | if (!usbreq->length) { | |
1894 | process_zlp(ep, req); | |
1895 | retval = 0; | |
1896 | goto probe_end; | |
1897 | } | |
1898 | if (!ep->in) { | |
1899 | pch_udc_start_rxrequest(ep, req); | |
1900 | } else { | |
1901 | /* | |
1902 | * For IN trfr the descriptors will be programmed and | |
1903 | * P bit will be set when | |
1904 | * we get an IN token | |
1905 | */ | |
1906 | pch_udc_wait_ep_stall(ep); | |
1907 | pch_udc_ep_clear_nak(ep); | |
1908 | pch_udc_enable_ep_interrupts(ep->dev, (1 << ep->num)); | |
f646cf94 TO |
1909 | } |
1910 | } | |
1911 | /* Now add this request to the ep's pending requests */ | |
1912 | if (req != NULL) | |
1913 | list_add_tail(&req->queue, &ep->queue); | |
1914 | ||
1915 | probe_end: | |
1916 | spin_unlock_irqrestore(&dev->lock, iflags); | |
1917 | return retval; | |
1918 | } | |
1919 | ||
1920 | /** | |
1921 | * pch_udc_pcd_dequeue() - This function de-queues a request packet. | |
1922 | * It is called by gadget driver | |
1923 | * @usbep: Reference to the USB endpoint structure | |
1924 | * @usbreq: Reference to the USB request | |
1925 | * | |
1926 | * Return codes: | |
1927 | * 0: Success | |
1928 | * linux error number: Failure | |
1929 | */ | |
1930 | static int pch_udc_pcd_dequeue(struct usb_ep *usbep, | |
1931 | struct usb_request *usbreq) | |
1932 | { | |
1933 | struct pch_udc_ep *ep; | |
1934 | struct pch_udc_request *req; | |
f646cf94 TO |
1935 | unsigned long flags; |
1936 | int ret = -EINVAL; | |
1937 | ||
1938 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
0ff21e0e | 1939 | if (!usbep || !usbreq || (!ep->ep.desc && ep->num)) |
f646cf94 TO |
1940 | return ret; |
1941 | req = container_of(usbreq, struct pch_udc_request, req); | |
1942 | spin_lock_irqsave(&ep->dev->lock, flags); | |
1943 | /* make sure it's still queued on this endpoint */ | |
1944 | list_for_each_entry(req, &ep->queue, queue) { | |
1945 | if (&req->req == usbreq) { | |
1946 | pch_udc_ep_set_nak(ep); | |
1947 | if (!list_empty(&req->queue)) | |
1948 | complete_req(ep, req, -ECONNRESET); | |
1949 | ret = 0; | |
1950 | break; | |
1951 | } | |
1952 | } | |
1953 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
1954 | return ret; | |
1955 | } | |
1956 | ||
1957 | /** | |
1958 | * pch_udc_pcd_set_halt() - This function Sets or clear the endpoint halt | |
1959 | * feature | |
1960 | * @usbep: Reference to the USB endpoint structure | |
1961 | * @halt: Specifies whether to set or clear the feature | |
1962 | * | |
1963 | * Return codes: | |
1964 | * 0: Success | |
1965 | * linux error number: Failure | |
1966 | */ | |
1967 | static int pch_udc_pcd_set_halt(struct usb_ep *usbep, int halt) | |
1968 | { | |
1969 | struct pch_udc_ep *ep; | |
f646cf94 TO |
1970 | unsigned long iflags; |
1971 | int ret; | |
1972 | ||
1973 | if (!usbep) | |
1974 | return -EINVAL; | |
1975 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
0ff21e0e | 1976 | if (!ep->ep.desc && !ep->num) |
f646cf94 TO |
1977 | return -EINVAL; |
1978 | if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
1979 | return -ESHUTDOWN; | |
1980 | spin_lock_irqsave(&udc_stall_spinlock, iflags); | |
1981 | if (list_empty(&ep->queue)) { | |
1982 | if (halt) { | |
1983 | if (ep->num == PCH_UDC_EP0) | |
1984 | ep->dev->stall = 1; | |
1985 | pch_udc_ep_set_stall(ep); | |
872ce511 MN |
1986 | pch_udc_enable_ep_interrupts( |
1987 | ep->dev, PCH_UDC_EPINT(ep->in, ep->num)); | |
f646cf94 TO |
1988 | } else { |
1989 | pch_udc_ep_clear_stall(ep); | |
1990 | } | |
1991 | ret = 0; | |
1992 | } else { | |
1993 | ret = -EAGAIN; | |
1994 | } | |
1995 | spin_unlock_irqrestore(&udc_stall_spinlock, iflags); | |
1996 | return ret; | |
1997 | } | |
1998 | ||
1999 | /** | |
2000 | * pch_udc_pcd_set_wedge() - This function Sets or clear the endpoint | |
2001 | * halt feature | |
2002 | * @usbep: Reference to the USB endpoint structure | |
2003 | * @halt: Specifies whether to set or clear the feature | |
2004 | * | |
2005 | * Return codes: | |
2006 | * 0: Success | |
2007 | * linux error number: Failure | |
2008 | */ | |
2009 | static int pch_udc_pcd_set_wedge(struct usb_ep *usbep) | |
2010 | { | |
2011 | struct pch_udc_ep *ep; | |
f646cf94 TO |
2012 | unsigned long iflags; |
2013 | int ret; | |
2014 | ||
2015 | if (!usbep) | |
2016 | return -EINVAL; | |
2017 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
0ff21e0e | 2018 | if (!ep->ep.desc && !ep->num) |
f646cf94 TO |
2019 | return -EINVAL; |
2020 | if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
2021 | return -ESHUTDOWN; | |
2022 | spin_lock_irqsave(&udc_stall_spinlock, iflags); | |
2023 | if (!list_empty(&ep->queue)) { | |
2024 | ret = -EAGAIN; | |
2025 | } else { | |
2026 | if (ep->num == PCH_UDC_EP0) | |
2027 | ep->dev->stall = 1; | |
2028 | pch_udc_ep_set_stall(ep); | |
2029 | pch_udc_enable_ep_interrupts(ep->dev, | |
2030 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2031 | ep->dev->prot_stall = 1; | |
2032 | ret = 0; | |
2033 | } | |
2034 | spin_unlock_irqrestore(&udc_stall_spinlock, iflags); | |
2035 | return ret; | |
2036 | } | |
2037 | ||
2038 | /** | |
2039 | * pch_udc_pcd_fifo_flush() - This function Flush the FIFO of specified endpoint | |
2040 | * @usbep: Reference to the USB endpoint structure | |
2041 | */ | |
2042 | static void pch_udc_pcd_fifo_flush(struct usb_ep *usbep) | |
2043 | { | |
2044 | struct pch_udc_ep *ep; | |
2045 | ||
2046 | if (!usbep) | |
2047 | return; | |
2048 | ||
2049 | ep = container_of(usbep, struct pch_udc_ep, ep); | |
0ff21e0e | 2050 | if (ep->ep.desc || !ep->num) |
f646cf94 TO |
2051 | pch_udc_ep_fifo_flush(ep, ep->in); |
2052 | } | |
2053 | ||
2054 | static const struct usb_ep_ops pch_udc_ep_ops = { | |
2055 | .enable = pch_udc_pcd_ep_enable, | |
2056 | .disable = pch_udc_pcd_ep_disable, | |
2057 | .alloc_request = pch_udc_alloc_request, | |
2058 | .free_request = pch_udc_free_request, | |
2059 | .queue = pch_udc_pcd_queue, | |
2060 | .dequeue = pch_udc_pcd_dequeue, | |
2061 | .set_halt = pch_udc_pcd_set_halt, | |
2062 | .set_wedge = pch_udc_pcd_set_wedge, | |
2063 | .fifo_status = NULL, | |
2064 | .fifo_flush = pch_udc_pcd_fifo_flush, | |
2065 | }; | |
2066 | ||
2067 | /** | |
2068 | * pch_udc_init_setup_buff() - This function initializes the SETUP buffer | |
2069 | * @td_stp: Reference to the SETP buffer structure | |
2070 | */ | |
2071 | static void pch_udc_init_setup_buff(struct pch_udc_stp_dma_desc *td_stp) | |
2072 | { | |
2073 | static u32 pky_marker; | |
2074 | ||
2075 | if (!td_stp) | |
2076 | return; | |
2077 | td_stp->reserved = ++pky_marker; | |
2078 | memset(&td_stp->request, 0xFF, sizeof td_stp->request); | |
2079 | td_stp->status = PCH_UDC_BS_HST_RDY; | |
2080 | } | |
2081 | ||
2082 | /** | |
2083 | * pch_udc_start_next_txrequest() - This function starts | |
2084 | * the next transmission requirement | |
2085 | * @ep: Reference to the endpoint structure | |
2086 | */ | |
2087 | static void pch_udc_start_next_txrequest(struct pch_udc_ep *ep) | |
2088 | { | |
2089 | struct pch_udc_request *req; | |
2090 | struct pch_udc_data_dma_desc *td_data; | |
2091 | ||
2092 | if (pch_udc_read_ep_control(ep) & UDC_EPCTL_P) | |
2093 | return; | |
2094 | ||
2095 | if (list_empty(&ep->queue)) | |
2096 | return; | |
2097 | ||
2098 | /* next request */ | |
2099 | req = list_entry(ep->queue.next, struct pch_udc_request, queue); | |
2100 | if (req->dma_going) | |
2101 | return; | |
2102 | if (!req->td_data) | |
2103 | return; | |
2104 | pch_udc_wait_ep_stall(ep); | |
2105 | req->dma_going = 1; | |
2106 | pch_udc_ep_set_ddptr(ep, 0); | |
2107 | td_data = req->td_data; | |
2108 | while (1) { | |
2109 | td_data->status = (td_data->status & ~PCH_UDC_BUFF_STS) | | |
2110 | PCH_UDC_BS_HST_RDY; | |
2111 | if ((td_data->status & PCH_UDC_DMA_LAST) == PCH_UDC_DMA_LAST) | |
2112 | break; | |
2113 | td_data = phys_to_virt(td_data->next); | |
2114 | } | |
2115 | pch_udc_ep_set_ddptr(ep, req->td_data_phys); | |
2116 | pch_udc_set_dma(ep->dev, DMA_DIR_TX); | |
2117 | pch_udc_ep_set_pd(ep); | |
2118 | pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num)); | |
2119 | pch_udc_ep_clear_nak(ep); | |
2120 | } | |
2121 | ||
2122 | /** | |
2123 | * pch_udc_complete_transfer() - This function completes a transfer | |
2124 | * @ep: Reference to the endpoint structure | |
2125 | */ | |
2126 | static void pch_udc_complete_transfer(struct pch_udc_ep *ep) | |
2127 | { | |
2128 | struct pch_udc_request *req; | |
2129 | struct pch_udc_dev *dev = ep->dev; | |
2130 | ||
2131 | if (list_empty(&ep->queue)) | |
2132 | return; | |
2133 | req = list_entry(ep->queue.next, struct pch_udc_request, queue); | |
2134 | if ((req->td_data_last->status & PCH_UDC_BUFF_STS) != | |
2135 | PCH_UDC_BS_DMA_DONE) | |
2136 | return; | |
2137 | if ((req->td_data_last->status & PCH_UDC_RXTX_STS) != | |
2138 | PCH_UDC_RTS_SUCC) { | |
2139 | dev_err(&dev->pdev->dev, "Invalid RXTX status (0x%08x) " | |
2140 | "epstatus=0x%08x\n", | |
2141 | (req->td_data_last->status & PCH_UDC_RXTX_STS), | |
2142 | (int)(ep->epsts)); | |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | req->req.actual = req->req.length; | |
2147 | req->td_data_last->status = PCH_UDC_BS_HST_BSY | PCH_UDC_DMA_LAST; | |
2148 | req->td_data->status = PCH_UDC_BS_HST_BSY | PCH_UDC_DMA_LAST; | |
2149 | complete_req(ep, req, 0); | |
2150 | req->dma_going = 0; | |
2151 | if (!list_empty(&ep->queue)) { | |
2152 | pch_udc_wait_ep_stall(ep); | |
2153 | pch_udc_ep_clear_nak(ep); | |
2154 | pch_udc_enable_ep_interrupts(ep->dev, | |
2155 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2156 | } else { | |
2157 | pch_udc_disable_ep_interrupts(ep->dev, | |
2158 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2159 | } | |
2160 | } | |
2161 | ||
2162 | /** | |
2163 | * pch_udc_complete_receiver() - This function completes a receiver | |
2164 | * @ep: Reference to the endpoint structure | |
2165 | */ | |
2166 | static void pch_udc_complete_receiver(struct pch_udc_ep *ep) | |
2167 | { | |
2168 | struct pch_udc_request *req; | |
2169 | struct pch_udc_dev *dev = ep->dev; | |
2170 | unsigned int count; | |
c17f459c TO |
2171 | struct pch_udc_data_dma_desc *td; |
2172 | dma_addr_t addr; | |
f646cf94 TO |
2173 | |
2174 | if (list_empty(&ep->queue)) | |
2175 | return; | |
f646cf94 TO |
2176 | /* next request */ |
2177 | req = list_entry(ep->queue.next, struct pch_udc_request, queue); | |
f646cf94 | 2178 | pch_udc_clear_dma(ep->dev, DMA_DIR_RX); |
abab0c67 | 2179 | pch_udc_ep_set_ddptr(ep, 0); |
c17f459c TO |
2180 | if ((req->td_data_last->status & PCH_UDC_BUFF_STS) == |
2181 | PCH_UDC_BS_DMA_DONE) | |
2182 | td = req->td_data_last; | |
2183 | else | |
2184 | td = req->td_data; | |
f646cf94 | 2185 | |
c17f459c TO |
2186 | while (1) { |
2187 | if ((td->status & PCH_UDC_RXTX_STS) != PCH_UDC_RTS_SUCC) { | |
2188 | dev_err(&dev->pdev->dev, "Invalid RXTX status=0x%08x " | |
2189 | "epstatus=0x%08x\n", | |
2190 | (req->td_data->status & PCH_UDC_RXTX_STS), | |
2191 | (int)(ep->epsts)); | |
2192 | return; | |
2193 | } | |
2194 | if ((td->status & PCH_UDC_BUFF_STS) == PCH_UDC_BS_DMA_DONE) | |
0a00790f | 2195 | if (td->status & PCH_UDC_DMA_LAST) { |
c17f459c TO |
2196 | count = td->status & PCH_UDC_RXTX_BYTES; |
2197 | break; | |
2198 | } | |
2199 | if (td == req->td_data_last) { | |
2200 | dev_err(&dev->pdev->dev, "Not complete RX descriptor"); | |
2201 | return; | |
2202 | } | |
2203 | addr = (dma_addr_t)td->next; | |
2204 | td = phys_to_virt(addr); | |
2205 | } | |
f646cf94 TO |
2206 | /* on 64k packets the RXBYTES field is zero */ |
2207 | if (!count && (req->req.length == UDC_DMA_MAXPACKET)) | |
2208 | count = UDC_DMA_MAXPACKET; | |
2209 | req->td_data->status |= PCH_UDC_DMA_LAST; | |
c17f459c | 2210 | td->status |= PCH_UDC_BS_HST_BSY; |
f646cf94 TO |
2211 | |
2212 | req->dma_going = 0; | |
2213 | req->req.actual = count; | |
2214 | complete_req(ep, req, 0); | |
2215 | /* If there is a new/failed requests try that now */ | |
2216 | if (!list_empty(&ep->queue)) { | |
2217 | req = list_entry(ep->queue.next, struct pch_udc_request, queue); | |
2218 | pch_udc_start_rxrequest(ep, req); | |
2219 | } | |
2220 | } | |
2221 | ||
2222 | /** | |
2223 | * pch_udc_svc_data_in() - This function process endpoint interrupts | |
2224 | * for IN endpoints | |
2225 | * @dev: Reference to the device structure | |
2226 | * @ep_num: Endpoint that generated the interrupt | |
2227 | */ | |
2228 | static void pch_udc_svc_data_in(struct pch_udc_dev *dev, int ep_num) | |
2229 | { | |
2230 | u32 epsts; | |
2231 | struct pch_udc_ep *ep; | |
2232 | ||
abab0c67 | 2233 | ep = &dev->ep[UDC_EPIN_IDX(ep_num)]; |
f646cf94 TO |
2234 | epsts = ep->epsts; |
2235 | ep->epsts = 0; | |
2236 | ||
2237 | if (!(epsts & (UDC_EPSTS_IN | UDC_EPSTS_BNA | UDC_EPSTS_HE | | |
2238 | UDC_EPSTS_TDC | UDC_EPSTS_RCS | UDC_EPSTS_TXEMPTY | | |
2239 | UDC_EPSTS_RSS | UDC_EPSTS_XFERDONE))) | |
2240 | return; | |
2241 | if ((epsts & UDC_EPSTS_BNA)) | |
2242 | return; | |
2243 | if (epsts & UDC_EPSTS_HE) | |
2244 | return; | |
2245 | if (epsts & UDC_EPSTS_RSS) { | |
2246 | pch_udc_ep_set_stall(ep); | |
2247 | pch_udc_enable_ep_interrupts(ep->dev, | |
2248 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2249 | } | |
49e20834 | 2250 | if (epsts & UDC_EPSTS_RCS) { |
f646cf94 TO |
2251 | if (!dev->prot_stall) { |
2252 | pch_udc_ep_clear_stall(ep); | |
2253 | } else { | |
2254 | pch_udc_ep_set_stall(ep); | |
2255 | pch_udc_enable_ep_interrupts(ep->dev, | |
2256 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2257 | } | |
49e20834 | 2258 | } |
f646cf94 TO |
2259 | if (epsts & UDC_EPSTS_TDC) |
2260 | pch_udc_complete_transfer(ep); | |
2261 | /* On IN interrupt, provide data if we have any */ | |
2262 | if ((epsts & UDC_EPSTS_IN) && !(epsts & UDC_EPSTS_RSS) && | |
2263 | !(epsts & UDC_EPSTS_TDC) && !(epsts & UDC_EPSTS_TXEMPTY)) | |
2264 | pch_udc_start_next_txrequest(ep); | |
2265 | } | |
2266 | ||
2267 | /** | |
2268 | * pch_udc_svc_data_out() - Handles interrupts from OUT endpoint | |
2269 | * @dev: Reference to the device structure | |
2270 | * @ep_num: Endpoint that generated the interrupt | |
2271 | */ | |
2272 | static void pch_udc_svc_data_out(struct pch_udc_dev *dev, int ep_num) | |
2273 | { | |
2274 | u32 epsts; | |
2275 | struct pch_udc_ep *ep; | |
2276 | struct pch_udc_request *req = NULL; | |
2277 | ||
abab0c67 | 2278 | ep = &dev->ep[UDC_EPOUT_IDX(ep_num)]; |
f646cf94 TO |
2279 | epsts = ep->epsts; |
2280 | ep->epsts = 0; | |
2281 | ||
2282 | if ((epsts & UDC_EPSTS_BNA) && (!list_empty(&ep->queue))) { | |
2283 | /* next request */ | |
2284 | req = list_entry(ep->queue.next, struct pch_udc_request, | |
2285 | queue); | |
2286 | if ((req->td_data_last->status & PCH_UDC_BUFF_STS) != | |
2287 | PCH_UDC_BS_DMA_DONE) { | |
2288 | if (!req->dma_going) | |
2289 | pch_udc_start_rxrequest(ep, req); | |
2290 | return; | |
2291 | } | |
2292 | } | |
2293 | if (epsts & UDC_EPSTS_HE) | |
2294 | return; | |
abab0c67 | 2295 | if (epsts & UDC_EPSTS_RSS) { |
f646cf94 TO |
2296 | pch_udc_ep_set_stall(ep); |
2297 | pch_udc_enable_ep_interrupts(ep->dev, | |
2298 | PCH_UDC_EPINT(ep->in, ep->num)); | |
abab0c67 | 2299 | } |
49e20834 | 2300 | if (epsts & UDC_EPSTS_RCS) { |
f646cf94 TO |
2301 | if (!dev->prot_stall) { |
2302 | pch_udc_ep_clear_stall(ep); | |
2303 | } else { | |
2304 | pch_udc_ep_set_stall(ep); | |
2305 | pch_udc_enable_ep_interrupts(ep->dev, | |
2306 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2307 | } | |
49e20834 | 2308 | } |
f646cf94 TO |
2309 | if (((epsts & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) == |
2310 | UDC_EPSTS_OUT_DATA) { | |
2311 | if (ep->dev->prot_stall == 1) { | |
2312 | pch_udc_ep_set_stall(ep); | |
2313 | pch_udc_enable_ep_interrupts(ep->dev, | |
2314 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2315 | } else { | |
2316 | pch_udc_complete_receiver(ep); | |
2317 | } | |
2318 | } | |
2319 | if (list_empty(&ep->queue)) | |
2320 | pch_udc_set_dma(dev, DMA_DIR_RX); | |
2321 | } | |
2322 | ||
2323 | /** | |
2324 | * pch_udc_svc_control_in() - Handle Control IN endpoint interrupts | |
2325 | * @dev: Reference to the device structure | |
2326 | */ | |
2327 | static void pch_udc_svc_control_in(struct pch_udc_dev *dev) | |
2328 | { | |
2329 | u32 epsts; | |
2330 | struct pch_udc_ep *ep; | |
abab0c67 | 2331 | struct pch_udc_ep *ep_out; |
f646cf94 TO |
2332 | |
2333 | ep = &dev->ep[UDC_EP0IN_IDX]; | |
abab0c67 | 2334 | ep_out = &dev->ep[UDC_EP0OUT_IDX]; |
f646cf94 TO |
2335 | epsts = ep->epsts; |
2336 | ep->epsts = 0; | |
2337 | ||
2338 | if (!(epsts & (UDC_EPSTS_IN | UDC_EPSTS_BNA | UDC_EPSTS_HE | | |
2339 | UDC_EPSTS_TDC | UDC_EPSTS_RCS | UDC_EPSTS_TXEMPTY | | |
2340 | UDC_EPSTS_XFERDONE))) | |
2341 | return; | |
2342 | if ((epsts & UDC_EPSTS_BNA)) | |
2343 | return; | |
2344 | if (epsts & UDC_EPSTS_HE) | |
2345 | return; | |
abab0c67 | 2346 | if ((epsts & UDC_EPSTS_TDC) && (!dev->stall)) { |
f646cf94 | 2347 | pch_udc_complete_transfer(ep); |
abab0c67 TO |
2348 | pch_udc_clear_dma(dev, DMA_DIR_RX); |
2349 | ep_out->td_data->status = (ep_out->td_data->status & | |
2350 | ~PCH_UDC_BUFF_STS) | | |
2351 | PCH_UDC_BS_HST_RDY; | |
2352 | pch_udc_ep_clear_nak(ep_out); | |
2353 | pch_udc_set_dma(dev, DMA_DIR_RX); | |
2354 | pch_udc_ep_set_rrdy(ep_out); | |
2355 | } | |
f646cf94 TO |
2356 | /* On IN interrupt, provide data if we have any */ |
2357 | if ((epsts & UDC_EPSTS_IN) && !(epsts & UDC_EPSTS_TDC) && | |
2358 | !(epsts & UDC_EPSTS_TXEMPTY)) | |
2359 | pch_udc_start_next_txrequest(ep); | |
2360 | } | |
2361 | ||
2362 | /** | |
2363 | * pch_udc_svc_control_out() - Routine that handle Control | |
2364 | * OUT endpoint interrupts | |
2365 | * @dev: Reference to the device structure | |
2366 | */ | |
2367 | static void pch_udc_svc_control_out(struct pch_udc_dev *dev) | |
3f8b6201 FB |
2368 | __releases(&dev->lock) |
2369 | __acquires(&dev->lock) | |
f646cf94 TO |
2370 | { |
2371 | u32 stat; | |
2372 | int setup_supported; | |
2373 | struct pch_udc_ep *ep; | |
2374 | ||
2375 | ep = &dev->ep[UDC_EP0OUT_IDX]; | |
2376 | stat = ep->epsts; | |
2377 | ep->epsts = 0; | |
2378 | ||
2379 | /* If setup data */ | |
2380 | if (((stat & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) == | |
2381 | UDC_EPSTS_OUT_SETUP) { | |
2382 | dev->stall = 0; | |
2383 | dev->ep[UDC_EP0IN_IDX].halted = 0; | |
2384 | dev->ep[UDC_EP0OUT_IDX].halted = 0; | |
f646cf94 TO |
2385 | dev->setup_data = ep->td_stp->request; |
2386 | pch_udc_init_setup_buff(ep->td_stp); | |
abab0c67 | 2387 | pch_udc_clear_dma(dev, DMA_DIR_RX); |
f646cf94 TO |
2388 | pch_udc_ep_fifo_flush(&(dev->ep[UDC_EP0IN_IDX]), |
2389 | dev->ep[UDC_EP0IN_IDX].in); | |
2390 | if ((dev->setup_data.bRequestType & USB_DIR_IN)) | |
2391 | dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IDX].ep; | |
2392 | else /* OUT */ | |
2393 | dev->gadget.ep0 = &ep->ep; | |
d3cb25a1 | 2394 | spin_lock(&dev->lock); |
f646cf94 TO |
2395 | /* If Mass storage Reset */ |
2396 | if ((dev->setup_data.bRequestType == 0x21) && | |
2397 | (dev->setup_data.bRequest == 0xFF)) | |
2398 | dev->prot_stall = 0; | |
2399 | /* call gadget with setup data received */ | |
2400 | setup_supported = dev->driver->setup(&dev->gadget, | |
2401 | &dev->setup_data); | |
d3cb25a1 | 2402 | spin_unlock(&dev->lock); |
abab0c67 TO |
2403 | |
2404 | if (dev->setup_data.bRequestType & USB_DIR_IN) { | |
2405 | ep->td_data->status = (ep->td_data->status & | |
2406 | ~PCH_UDC_BUFF_STS) | | |
2407 | PCH_UDC_BS_HST_RDY; | |
2408 | pch_udc_ep_set_ddptr(ep, ep->td_data_phys); | |
2409 | } | |
f646cf94 TO |
2410 | /* ep0 in returns data on IN phase */ |
2411 | if (setup_supported >= 0 && setup_supported < | |
2412 | UDC_EP0IN_MAX_PKT_SIZE) { | |
2413 | pch_udc_ep_clear_nak(&(dev->ep[UDC_EP0IN_IDX])); | |
2414 | /* Gadget would have queued a request when | |
2415 | * we called the setup */ | |
abab0c67 TO |
2416 | if (!(dev->setup_data.bRequestType & USB_DIR_IN)) { |
2417 | pch_udc_set_dma(dev, DMA_DIR_RX); | |
2418 | pch_udc_ep_clear_nak(ep); | |
2419 | } | |
f646cf94 TO |
2420 | } else if (setup_supported < 0) { |
2421 | /* if unsupported request, then stall */ | |
2422 | pch_udc_ep_set_stall(&(dev->ep[UDC_EP0IN_IDX])); | |
2423 | pch_udc_enable_ep_interrupts(ep->dev, | |
2424 | PCH_UDC_EPINT(ep->in, ep->num)); | |
2425 | dev->stall = 0; | |
2426 | pch_udc_set_dma(dev, DMA_DIR_RX); | |
2427 | } else { | |
2428 | dev->waiting_zlp_ack = 1; | |
2429 | } | |
2430 | } else if ((((stat & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) == | |
2431 | UDC_EPSTS_OUT_DATA) && !dev->stall) { | |
abab0c67 TO |
2432 | pch_udc_clear_dma(dev, DMA_DIR_RX); |
2433 | pch_udc_ep_set_ddptr(ep, 0); | |
2434 | if (!list_empty(&ep->queue)) { | |
ff176a4e | 2435 | ep->epsts = stat; |
abab0c67 | 2436 | pch_udc_svc_data_out(dev, PCH_UDC_EP0); |
f646cf94 | 2437 | } |
abab0c67 | 2438 | pch_udc_set_dma(dev, DMA_DIR_RX); |
f646cf94 TO |
2439 | } |
2440 | pch_udc_ep_set_rrdy(ep); | |
2441 | } | |
2442 | ||
2443 | ||
2444 | /** | |
2445 | * pch_udc_postsvc_epinters() - This function enables end point interrupts | |
2446 | * and clears NAK status | |
2447 | * @dev: Reference to the device structure | |
2448 | * @ep_num: End point number | |
2449 | */ | |
2450 | static void pch_udc_postsvc_epinters(struct pch_udc_dev *dev, int ep_num) | |
2451 | { | |
872ce511 MN |
2452 | struct pch_udc_ep *ep = &dev->ep[UDC_EPIN_IDX(ep_num)]; |
2453 | if (list_empty(&ep->queue)) | |
2454 | return; | |
2455 | pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num)); | |
2456 | pch_udc_ep_clear_nak(ep); | |
f646cf94 TO |
2457 | } |
2458 | ||
2459 | /** | |
2460 | * pch_udc_read_all_epstatus() - This function read all endpoint status | |
2461 | * @dev: Reference to the device structure | |
2462 | * @ep_intr: Status of endpoint interrupt | |
2463 | */ | |
2464 | static void pch_udc_read_all_epstatus(struct pch_udc_dev *dev, u32 ep_intr) | |
2465 | { | |
2466 | int i; | |
2467 | struct pch_udc_ep *ep; | |
2468 | ||
2469 | for (i = 0; i < PCH_UDC_USED_EP_NUM; i++) { | |
2470 | /* IN */ | |
2471 | if (ep_intr & (0x1 << i)) { | |
abab0c67 | 2472 | ep = &dev->ep[UDC_EPIN_IDX(i)]; |
f646cf94 TO |
2473 | ep->epsts = pch_udc_read_ep_status(ep); |
2474 | pch_udc_clear_ep_status(ep, ep->epsts); | |
2475 | } | |
2476 | /* OUT */ | |
2477 | if (ep_intr & (0x10000 << i)) { | |
abab0c67 | 2478 | ep = &dev->ep[UDC_EPOUT_IDX(i)]; |
f646cf94 TO |
2479 | ep->epsts = pch_udc_read_ep_status(ep); |
2480 | pch_udc_clear_ep_status(ep, ep->epsts); | |
2481 | } | |
2482 | } | |
2483 | } | |
2484 | ||
2485 | /** | |
2486 | * pch_udc_activate_control_ep() - This function enables the control endpoints | |
2487 | * for traffic after a reset | |
2488 | * @dev: Reference to the device structure | |
2489 | */ | |
2490 | static void pch_udc_activate_control_ep(struct pch_udc_dev *dev) | |
2491 | { | |
2492 | struct pch_udc_ep *ep; | |
2493 | u32 val; | |
2494 | ||
2495 | /* Setup the IN endpoint */ | |
2496 | ep = &dev->ep[UDC_EP0IN_IDX]; | |
2497 | pch_udc_clear_ep_control(ep); | |
2498 | pch_udc_ep_fifo_flush(ep, ep->in); | |
2499 | pch_udc_ep_set_bufsz(ep, UDC_EP0IN_BUFF_SIZE, ep->in); | |
2500 | pch_udc_ep_set_maxpkt(ep, UDC_EP0IN_MAX_PKT_SIZE); | |
2501 | /* Initialize the IN EP Descriptor */ | |
2502 | ep->td_data = NULL; | |
2503 | ep->td_stp = NULL; | |
2504 | ep->td_data_phys = 0; | |
2505 | ep->td_stp_phys = 0; | |
2506 | ||
2507 | /* Setup the OUT endpoint */ | |
2508 | ep = &dev->ep[UDC_EP0OUT_IDX]; | |
2509 | pch_udc_clear_ep_control(ep); | |
2510 | pch_udc_ep_fifo_flush(ep, ep->in); | |
2511 | pch_udc_ep_set_bufsz(ep, UDC_EP0OUT_BUFF_SIZE, ep->in); | |
2512 | pch_udc_ep_set_maxpkt(ep, UDC_EP0OUT_MAX_PKT_SIZE); | |
2513 | val = UDC_EP0OUT_MAX_PKT_SIZE << UDC_CSR_NE_MAX_PKT_SHIFT; | |
2514 | pch_udc_write_csr(ep->dev, val, UDC_EP0OUT_IDX); | |
2515 | ||
2516 | /* Initialize the SETUP buffer */ | |
2517 | pch_udc_init_setup_buff(ep->td_stp); | |
2518 | /* Write the pointer address of dma descriptor */ | |
2519 | pch_udc_ep_set_subptr(ep, ep->td_stp_phys); | |
2520 | /* Write the pointer address of Setup descriptor */ | |
2521 | pch_udc_ep_set_ddptr(ep, ep->td_data_phys); | |
2522 | ||
2523 | /* Initialize the dma descriptor */ | |
2524 | ep->td_data->status = PCH_UDC_DMA_LAST; | |
2525 | ep->td_data->dataptr = dev->dma_addr; | |
2526 | ep->td_data->next = ep->td_data_phys; | |
2527 | ||
2528 | pch_udc_ep_clear_nak(ep); | |
2529 | } | |
2530 | ||
2531 | ||
2532 | /** | |
2533 | * pch_udc_svc_ur_interrupt() - This function handles a USB reset interrupt | |
2534 | * @dev: Reference to driver structure | |
2535 | */ | |
2536 | static void pch_udc_svc_ur_interrupt(struct pch_udc_dev *dev) | |
2537 | { | |
2538 | struct pch_udc_ep *ep; | |
2539 | int i; | |
2540 | ||
2541 | pch_udc_clear_dma(dev, DMA_DIR_TX); | |
2542 | pch_udc_clear_dma(dev, DMA_DIR_RX); | |
2543 | /* Mask all endpoint interrupts */ | |
2544 | pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL); | |
2545 | /* clear all endpoint interrupts */ | |
2546 | pch_udc_write_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL); | |
2547 | ||
2548 | for (i = 0; i < PCH_UDC_EP_NUM; i++) { | |
2549 | ep = &dev->ep[i]; | |
2550 | pch_udc_clear_ep_status(ep, UDC_EPSTS_ALL_CLR_MASK); | |
2551 | pch_udc_clear_ep_control(ep); | |
2552 | pch_udc_ep_set_ddptr(ep, 0); | |
2553 | pch_udc_write_csr(ep->dev, 0x00, i); | |
2554 | } | |
2555 | dev->stall = 0; | |
2556 | dev->prot_stall = 0; | |
2557 | dev->waiting_zlp_ack = 0; | |
2558 | dev->set_cfg_not_acked = 0; | |
2559 | ||
2560 | /* disable ep to empty req queue. Skip the control EP's */ | |
2561 | for (i = 0; i < (PCH_UDC_USED_EP_NUM*2); i++) { | |
2562 | ep = &dev->ep[i]; | |
2563 | pch_udc_ep_set_nak(ep); | |
2564 | pch_udc_ep_fifo_flush(ep, ep->in); | |
2565 | /* Complete request queue */ | |
2566 | empty_req_queue(ep); | |
2567 | } | |
7918d8c5 | 2568 | if (dev->driver) { |
d3cb25a1 | 2569 | spin_unlock(&dev->lock); |
1d23d16a IA |
2570 | usb_gadget_udc_reset(&dev->gadget, dev->driver); |
2571 | spin_lock(&dev->lock); | |
c50a3bff | 2572 | } |
f646cf94 TO |
2573 | } |
2574 | ||
2575 | /** | |
2576 | * pch_udc_svc_enum_interrupt() - This function handles a USB speed enumeration | |
2577 | * done interrupt | |
2578 | * @dev: Reference to driver structure | |
2579 | */ | |
2580 | static void pch_udc_svc_enum_interrupt(struct pch_udc_dev *dev) | |
2581 | { | |
2582 | u32 dev_stat, dev_speed; | |
2583 | u32 speed = USB_SPEED_FULL; | |
2584 | ||
2585 | dev_stat = pch_udc_read_device_status(dev); | |
2586 | dev_speed = (dev_stat & UDC_DEVSTS_ENUM_SPEED_MASK) >> | |
2587 | UDC_DEVSTS_ENUM_SPEED_SHIFT; | |
2588 | switch (dev_speed) { | |
2589 | case UDC_DEVSTS_ENUM_SPEED_HIGH: | |
2590 | speed = USB_SPEED_HIGH; | |
2591 | break; | |
2592 | case UDC_DEVSTS_ENUM_SPEED_FULL: | |
2593 | speed = USB_SPEED_FULL; | |
2594 | break; | |
2595 | case UDC_DEVSTS_ENUM_SPEED_LOW: | |
2596 | speed = USB_SPEED_LOW; | |
2597 | break; | |
2598 | default: | |
2599 | BUG(); | |
2600 | } | |
2601 | dev->gadget.speed = speed; | |
2602 | pch_udc_activate_control_ep(dev); | |
2603 | pch_udc_enable_ep_interrupts(dev, UDC_EPINT_IN_EP0 | UDC_EPINT_OUT_EP0); | |
2604 | pch_udc_set_dma(dev, DMA_DIR_TX); | |
2605 | pch_udc_set_dma(dev, DMA_DIR_RX); | |
2606 | pch_udc_ep_set_rrdy(&(dev->ep[UDC_EP0OUT_IDX])); | |
83331040 TM |
2607 | |
2608 | /* enable device interrupts */ | |
2609 | pch_udc_enable_interrupts(dev, UDC_DEVINT_UR | UDC_DEVINT_US | | |
2610 | UDC_DEVINT_ES | UDC_DEVINT_ENUM | | |
2611 | UDC_DEVINT_SI | UDC_DEVINT_SC); | |
f646cf94 TO |
2612 | } |
2613 | ||
2614 | /** | |
2615 | * pch_udc_svc_intf_interrupt() - This function handles a set interface | |
2616 | * interrupt | |
2617 | * @dev: Reference to driver structure | |
2618 | */ | |
2619 | static void pch_udc_svc_intf_interrupt(struct pch_udc_dev *dev) | |
2620 | { | |
2621 | u32 reg, dev_stat = 0; | |
6b968737 | 2622 | int i; |
f646cf94 TO |
2623 | |
2624 | dev_stat = pch_udc_read_device_status(dev); | |
2625 | dev->cfg_data.cur_intf = (dev_stat & UDC_DEVSTS_INTF_MASK) >> | |
2626 | UDC_DEVSTS_INTF_SHIFT; | |
2627 | dev->cfg_data.cur_alt = (dev_stat & UDC_DEVSTS_ALT_MASK) >> | |
2628 | UDC_DEVSTS_ALT_SHIFT; | |
2629 | dev->set_cfg_not_acked = 1; | |
2630 | /* Construct the usb request for gadget driver and inform it */ | |
2631 | memset(&dev->setup_data, 0 , sizeof dev->setup_data); | |
2632 | dev->setup_data.bRequest = USB_REQ_SET_INTERFACE; | |
2633 | dev->setup_data.bRequestType = USB_RECIP_INTERFACE; | |
2634 | dev->setup_data.wValue = cpu_to_le16(dev->cfg_data.cur_alt); | |
2635 | dev->setup_data.wIndex = cpu_to_le16(dev->cfg_data.cur_intf); | |
2636 | /* programm the Endpoint Cfg registers */ | |
2637 | /* Only one end point cfg register */ | |
2638 | reg = pch_udc_read_csr(dev, UDC_EP0OUT_IDX); | |
2639 | reg = (reg & ~UDC_CSR_NE_INTF_MASK) | | |
2640 | (dev->cfg_data.cur_intf << UDC_CSR_NE_INTF_SHIFT); | |
2641 | reg = (reg & ~UDC_CSR_NE_ALT_MASK) | | |
2642 | (dev->cfg_data.cur_alt << UDC_CSR_NE_ALT_SHIFT); | |
2643 | pch_udc_write_csr(dev, reg, UDC_EP0OUT_IDX); | |
2644 | for (i = 0; i < PCH_UDC_USED_EP_NUM * 2; i++) { | |
2645 | /* clear stall bits */ | |
2646 | pch_udc_ep_clear_stall(&(dev->ep[i])); | |
2647 | dev->ep[i].halted = 0; | |
2648 | } | |
2649 | dev->stall = 0; | |
d3cb25a1 | 2650 | spin_unlock(&dev->lock); |
1d23d16a IA |
2651 | dev->driver->setup(&dev->gadget, &dev->setup_data); |
2652 | spin_lock(&dev->lock); | |
f646cf94 TO |
2653 | } |
2654 | ||
2655 | /** | |
2656 | * pch_udc_svc_cfg_interrupt() - This function handles a set configuration | |
2657 | * interrupt | |
2658 | * @dev: Reference to driver structure | |
2659 | */ | |
2660 | static void pch_udc_svc_cfg_interrupt(struct pch_udc_dev *dev) | |
2661 | { | |
6b968737 | 2662 | int i; |
f646cf94 TO |
2663 | u32 reg, dev_stat = 0; |
2664 | ||
2665 | dev_stat = pch_udc_read_device_status(dev); | |
2666 | dev->set_cfg_not_acked = 1; | |
2667 | dev->cfg_data.cur_cfg = (dev_stat & UDC_DEVSTS_CFG_MASK) >> | |
2668 | UDC_DEVSTS_CFG_SHIFT; | |
2669 | /* make usb request for gadget driver */ | |
2670 | memset(&dev->setup_data, 0 , sizeof dev->setup_data); | |
2671 | dev->setup_data.bRequest = USB_REQ_SET_CONFIGURATION; | |
2672 | dev->setup_data.wValue = cpu_to_le16(dev->cfg_data.cur_cfg); | |
2673 | /* program the NE registers */ | |
2674 | /* Only one end point cfg register */ | |
2675 | reg = pch_udc_read_csr(dev, UDC_EP0OUT_IDX); | |
2676 | reg = (reg & ~UDC_CSR_NE_CFG_MASK) | | |
2677 | (dev->cfg_data.cur_cfg << UDC_CSR_NE_CFG_SHIFT); | |
2678 | pch_udc_write_csr(dev, reg, UDC_EP0OUT_IDX); | |
2679 | for (i = 0; i < PCH_UDC_USED_EP_NUM * 2; i++) { | |
2680 | /* clear stall bits */ | |
2681 | pch_udc_ep_clear_stall(&(dev->ep[i])); | |
2682 | dev->ep[i].halted = 0; | |
2683 | } | |
2684 | dev->stall = 0; | |
2685 | ||
2686 | /* call gadget zero with setup data received */ | |
d3cb25a1 | 2687 | spin_unlock(&dev->lock); |
1d23d16a IA |
2688 | dev->driver->setup(&dev->gadget, &dev->setup_data); |
2689 | spin_lock(&dev->lock); | |
f646cf94 TO |
2690 | } |
2691 | ||
2692 | /** | |
2693 | * pch_udc_dev_isr() - This function services device interrupts | |
2694 | * by invoking appropriate routines. | |
2695 | * @dev: Reference to the device structure | |
2696 | * @dev_intr: The Device interrupt status. | |
2697 | */ | |
2698 | static void pch_udc_dev_isr(struct pch_udc_dev *dev, u32 dev_intr) | |
2699 | { | |
dd63180b TM |
2700 | int vbus; |
2701 | ||
f646cf94 | 2702 | /* USB Reset Interrupt */ |
9645f7d3 | 2703 | if (dev_intr & UDC_DEVINT_UR) { |
f646cf94 | 2704 | pch_udc_svc_ur_interrupt(dev); |
9645f7d3 TM |
2705 | dev_dbg(&dev->pdev->dev, "USB_RESET\n"); |
2706 | } | |
f646cf94 | 2707 | /* Enumeration Done Interrupt */ |
9645f7d3 | 2708 | if (dev_intr & UDC_DEVINT_ENUM) { |
f646cf94 | 2709 | pch_udc_svc_enum_interrupt(dev); |
9645f7d3 TM |
2710 | dev_dbg(&dev->pdev->dev, "USB_ENUM\n"); |
2711 | } | |
f646cf94 TO |
2712 | /* Set Interface Interrupt */ |
2713 | if (dev_intr & UDC_DEVINT_SI) | |
2714 | pch_udc_svc_intf_interrupt(dev); | |
2715 | /* Set Config Interrupt */ | |
2716 | if (dev_intr & UDC_DEVINT_SC) | |
2717 | pch_udc_svc_cfg_interrupt(dev); | |
2718 | /* USB Suspend interrupt */ | |
84566abb TM |
2719 | if (dev_intr & UDC_DEVINT_US) { |
2720 | if (dev->driver | |
2721 | && dev->driver->suspend) { | |
d3cb25a1 | 2722 | spin_unlock(&dev->lock); |
9903b6be FB |
2723 | dev->driver->suspend(&dev->gadget); |
2724 | spin_lock(&dev->lock); | |
84566abb | 2725 | } |
1c575d2d | 2726 | |
dd63180b TM |
2727 | vbus = pch_vbus_gpio_get_value(dev); |
2728 | if ((dev->vbus_session == 0) | |
2729 | && (vbus != 1)) { | |
1c575d2d | 2730 | if (dev->driver && dev->driver->disconnect) { |
d3cb25a1 | 2731 | spin_unlock(&dev->lock); |
9903b6be FB |
2732 | dev->driver->disconnect(&dev->gadget); |
2733 | spin_lock(&dev->lock); | |
1c575d2d TM |
2734 | } |
2735 | pch_udc_reconnect(dev); | |
dd63180b | 2736 | } else if ((dev->vbus_session == 0) |
637b78eb TM |
2737 | && (vbus == 1) |
2738 | && !dev->vbus_gpio.intr) | |
dd63180b TM |
2739 | schedule_work(&dev->vbus_gpio.irq_work_fall); |
2740 | ||
f646cf94 | 2741 | dev_dbg(&dev->pdev->dev, "USB_SUSPEND\n"); |
84566abb | 2742 | } |
f646cf94 TO |
2743 | /* Clear the SOF interrupt, if enabled */ |
2744 | if (dev_intr & UDC_DEVINT_SOF) | |
2745 | dev_dbg(&dev->pdev->dev, "SOF\n"); | |
2746 | /* ES interrupt, IDLE > 3ms on the USB */ | |
2747 | if (dev_intr & UDC_DEVINT_ES) | |
2748 | dev_dbg(&dev->pdev->dev, "ES\n"); | |
2749 | /* RWKP interrupt */ | |
2750 | if (dev_intr & UDC_DEVINT_RWKP) | |
2751 | dev_dbg(&dev->pdev->dev, "RWKP\n"); | |
2752 | } | |
2753 | ||
2754 | /** | |
2755 | * pch_udc_isr() - This function handles interrupts from the PCH USB Device | |
2756 | * @irq: Interrupt request number | |
2757 | * @dev: Reference to the device structure | |
2758 | */ | |
2759 | static irqreturn_t pch_udc_isr(int irq, void *pdev) | |
2760 | { | |
2761 | struct pch_udc_dev *dev = (struct pch_udc_dev *) pdev; | |
2762 | u32 dev_intr, ep_intr; | |
2763 | int i; | |
2764 | ||
2765 | dev_intr = pch_udc_read_device_interrupts(dev); | |
2766 | ep_intr = pch_udc_read_ep_interrupts(dev); | |
2767 | ||
1c575d2d TM |
2768 | /* For a hot plug, this find that the controller is hung up. */ |
2769 | if (dev_intr == ep_intr) | |
2770 | if (dev_intr == pch_udc_readl(dev, UDC_DEVCFG_ADDR)) { | |
2771 | dev_dbg(&dev->pdev->dev, "UDC: Hung up\n"); | |
2772 | /* The controller is reset */ | |
2773 | pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR); | |
2774 | return IRQ_HANDLED; | |
2775 | } | |
f646cf94 TO |
2776 | if (dev_intr) |
2777 | /* Clear device interrupts */ | |
2778 | pch_udc_write_device_interrupts(dev, dev_intr); | |
2779 | if (ep_intr) | |
2780 | /* Clear ep interrupts */ | |
2781 | pch_udc_write_ep_interrupts(dev, ep_intr); | |
2782 | if (!dev_intr && !ep_intr) | |
2783 | return IRQ_NONE; | |
2784 | spin_lock(&dev->lock); | |
2785 | if (dev_intr) | |
2786 | pch_udc_dev_isr(dev, dev_intr); | |
2787 | if (ep_intr) { | |
2788 | pch_udc_read_all_epstatus(dev, ep_intr); | |
2789 | /* Process Control In interrupts, if present */ | |
2790 | if (ep_intr & UDC_EPINT_IN_EP0) { | |
2791 | pch_udc_svc_control_in(dev); | |
2792 | pch_udc_postsvc_epinters(dev, 0); | |
2793 | } | |
2794 | /* Process Control Out interrupts, if present */ | |
2795 | if (ep_intr & UDC_EPINT_OUT_EP0) | |
2796 | pch_udc_svc_control_out(dev); | |
2797 | /* Process data in end point interrupts */ | |
2798 | for (i = 1; i < PCH_UDC_USED_EP_NUM; i++) { | |
2799 | if (ep_intr & (1 << i)) { | |
2800 | pch_udc_svc_data_in(dev, i); | |
2801 | pch_udc_postsvc_epinters(dev, i); | |
2802 | } | |
2803 | } | |
2804 | /* Process data out end point interrupts */ | |
2805 | for (i = UDC_EPINT_OUT_SHIFT + 1; i < (UDC_EPINT_OUT_SHIFT + | |
2806 | PCH_UDC_USED_EP_NUM); i++) | |
2807 | if (ep_intr & (1 << i)) | |
2808 | pch_udc_svc_data_out(dev, i - | |
2809 | UDC_EPINT_OUT_SHIFT); | |
2810 | } | |
2811 | spin_unlock(&dev->lock); | |
2812 | return IRQ_HANDLED; | |
2813 | } | |
2814 | ||
2815 | /** | |
2816 | * pch_udc_setup_ep0() - This function enables control endpoint for traffic | |
2817 | * @dev: Reference to the device structure | |
2818 | */ | |
2819 | static void pch_udc_setup_ep0(struct pch_udc_dev *dev) | |
2820 | { | |
2821 | /* enable ep0 interrupts */ | |
2822 | pch_udc_enable_ep_interrupts(dev, UDC_EPINT_IN_EP0 | | |
2823 | UDC_EPINT_OUT_EP0); | |
2824 | /* enable device interrupts */ | |
2825 | pch_udc_enable_interrupts(dev, UDC_DEVINT_UR | UDC_DEVINT_US | | |
2826 | UDC_DEVINT_ES | UDC_DEVINT_ENUM | | |
2827 | UDC_DEVINT_SI | UDC_DEVINT_SC); | |
2828 | } | |
2829 | ||
f646cf94 TO |
2830 | /** |
2831 | * pch_udc_pcd_reinit() - This API initializes the endpoint structures | |
2832 | * @dev: Reference to the driver structure | |
2833 | */ | |
2834 | static void pch_udc_pcd_reinit(struct pch_udc_dev *dev) | |
2835 | { | |
2836 | const char *const ep_string[] = { | |
2837 | ep0_string, "ep0out", "ep1in", "ep1out", "ep2in", "ep2out", | |
2838 | "ep3in", "ep3out", "ep4in", "ep4out", "ep5in", "ep5out", | |
2839 | "ep6in", "ep6out", "ep7in", "ep7out", "ep8in", "ep8out", | |
2840 | "ep9in", "ep9out", "ep10in", "ep10out", "ep11in", "ep11out", | |
2841 | "ep12in", "ep12out", "ep13in", "ep13out", "ep14in", "ep14out", | |
2842 | "ep15in", "ep15out", | |
2843 | }; | |
2844 | int i; | |
2845 | ||
2846 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
2847 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
2848 | ||
2849 | /* Initialize the endpoints structures */ | |
2850 | memset(dev->ep, 0, sizeof dev->ep); | |
2851 | for (i = 0; i < PCH_UDC_EP_NUM; i++) { | |
2852 | struct pch_udc_ep *ep = &dev->ep[i]; | |
2853 | ep->dev = dev; | |
2854 | ep->halted = 1; | |
2855 | ep->num = i / 2; | |
2856 | ep->in = ~i & 1; | |
2857 | ep->ep.name = ep_string[i]; | |
2858 | ep->ep.ops = &pch_udc_ep_ops; | |
85a4ed00 | 2859 | if (ep->in) { |
f646cf94 | 2860 | ep->offset_addr = ep->num * UDC_EP_REG_SHIFT; |
85a4ed00 RB |
2861 | ep->ep.caps.dir_in = true; |
2862 | } else { | |
f646cf94 TO |
2863 | ep->offset_addr = (UDC_EPINT_OUT_SHIFT + ep->num) * |
2864 | UDC_EP_REG_SHIFT; | |
85a4ed00 RB |
2865 | ep->ep.caps.dir_out = true; |
2866 | } | |
2867 | if (i == UDC_EP0IN_IDX || i == UDC_EP0OUT_IDX) { | |
2868 | ep->ep.caps.type_control = true; | |
2869 | } else { | |
2870 | ep->ep.caps.type_iso = true; | |
2871 | ep->ep.caps.type_bulk = true; | |
2872 | ep->ep.caps.type_int = true; | |
2873 | } | |
f646cf94 | 2874 | /* need to set ep->ep.maxpacket and set Default Configuration?*/ |
e117e742 | 2875 | usb_ep_set_maxpacket_limit(&ep->ep, UDC_BULK_MAX_PKT_SIZE); |
f646cf94 TO |
2876 | list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); |
2877 | INIT_LIST_HEAD(&ep->queue); | |
2878 | } | |
e117e742 RB |
2879 | usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0IN_IDX].ep, UDC_EP0IN_MAX_PKT_SIZE); |
2880 | usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0OUT_IDX].ep, UDC_EP0OUT_MAX_PKT_SIZE); | |
f646cf94 | 2881 | |
f646cf94 TO |
2882 | /* remove ep0 in and out from the list. They have own pointer */ |
2883 | list_del_init(&dev->ep[UDC_EP0IN_IDX].ep.ep_list); | |
2884 | list_del_init(&dev->ep[UDC_EP0OUT_IDX].ep.ep_list); | |
2885 | ||
2886 | dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IDX].ep; | |
2887 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
2888 | } | |
2889 | ||
2890 | /** | |
2891 | * pch_udc_pcd_init() - This API initializes the driver structure | |
2892 | * @dev: Reference to the driver structure | |
2893 | * | |
2894 | * Return codes: | |
2895 | * 0: Success | |
2896 | */ | |
2897 | static int pch_udc_pcd_init(struct pch_udc_dev *dev) | |
2898 | { | |
2899 | pch_udc_init(dev); | |
2900 | pch_udc_pcd_reinit(dev); | |
dd63180b | 2901 | pch_vbus_gpio_init(dev, vbus_gpio_port); |
f646cf94 TO |
2902 | return 0; |
2903 | } | |
2904 | ||
2905 | /** | |
2906 | * init_dma_pools() - create dma pools during initialization | |
2907 | * @pdev: reference to struct pci_dev | |
2908 | */ | |
2909 | static int init_dma_pools(struct pch_udc_dev *dev) | |
2910 | { | |
2911 | struct pch_udc_stp_dma_desc *td_stp; | |
2912 | struct pch_udc_data_dma_desc *td_data; | |
969733f3 | 2913 | void *ep0out_buf; |
f646cf94 TO |
2914 | |
2915 | /* DMA setup */ | |
2916 | dev->data_requests = pci_pool_create("data_requests", dev->pdev, | |
2917 | sizeof(struct pch_udc_data_dma_desc), 0, 0); | |
2918 | if (!dev->data_requests) { | |
2919 | dev_err(&dev->pdev->dev, "%s: can't get request data pool\n", | |
2920 | __func__); | |
2921 | return -ENOMEM; | |
2922 | } | |
2923 | ||
2924 | /* dma desc for setup data */ | |
2925 | dev->stp_requests = pci_pool_create("setup requests", dev->pdev, | |
2926 | sizeof(struct pch_udc_stp_dma_desc), 0, 0); | |
2927 | if (!dev->stp_requests) { | |
2928 | dev_err(&dev->pdev->dev, "%s: can't get setup request pool\n", | |
2929 | __func__); | |
2930 | return -ENOMEM; | |
2931 | } | |
2932 | /* setup */ | |
2933 | td_stp = pci_pool_alloc(dev->stp_requests, GFP_KERNEL, | |
2934 | &dev->ep[UDC_EP0OUT_IDX].td_stp_phys); | |
2935 | if (!td_stp) { | |
2936 | dev_err(&dev->pdev->dev, | |
2937 | "%s: can't allocate setup dma descriptor\n", __func__); | |
2938 | return -ENOMEM; | |
2939 | } | |
2940 | dev->ep[UDC_EP0OUT_IDX].td_stp = td_stp; | |
2941 | ||
2942 | /* data: 0 packets !? */ | |
2943 | td_data = pci_pool_alloc(dev->data_requests, GFP_KERNEL, | |
2944 | &dev->ep[UDC_EP0OUT_IDX].td_data_phys); | |
2945 | if (!td_data) { | |
2946 | dev_err(&dev->pdev->dev, | |
2947 | "%s: can't allocate data dma descriptor\n", __func__); | |
2948 | return -ENOMEM; | |
2949 | } | |
2950 | dev->ep[UDC_EP0OUT_IDX].td_data = td_data; | |
2951 | dev->ep[UDC_EP0IN_IDX].td_stp = NULL; | |
2952 | dev->ep[UDC_EP0IN_IDX].td_stp_phys = 0; | |
2953 | dev->ep[UDC_EP0IN_IDX].td_data = NULL; | |
2954 | dev->ep[UDC_EP0IN_IDX].td_data_phys = 0; | |
abab0c67 | 2955 | |
969733f3 AS |
2956 | ep0out_buf = devm_kzalloc(&dev->pdev->dev, UDC_EP0OUT_BUFF_SIZE * 4, |
2957 | GFP_KERNEL); | |
2958 | if (!ep0out_buf) | |
abab0c67 | 2959 | return -ENOMEM; |
969733f3 | 2960 | dev->dma_addr = dma_map_single(&dev->pdev->dev, ep0out_buf, |
abab0c67 TO |
2961 | UDC_EP0OUT_BUFF_SIZE * 4, |
2962 | DMA_FROM_DEVICE); | |
f646cf94 TO |
2963 | return 0; |
2964 | } | |
2965 | ||
1fb3b1cf FB |
2966 | static int pch_udc_start(struct usb_gadget *g, |
2967 | struct usb_gadget_driver *driver) | |
f646cf94 | 2968 | { |
1fb3b1cf | 2969 | struct pch_udc_dev *dev = to_pch_udc(g); |
f646cf94 | 2970 | |
f646cf94 TO |
2971 | driver->driver.bus = NULL; |
2972 | dev->driver = driver; | |
f646cf94 | 2973 | |
f646cf94 TO |
2974 | /* get ready for ep0 traffic */ |
2975 | pch_udc_setup_ep0(dev); | |
2976 | ||
2977 | /* clear SD */ | |
637b78eb TM |
2978 | if ((pch_vbus_gpio_get_value(dev) != 0) || !dev->vbus_gpio.intr) |
2979 | pch_udc_clear_disconnect(dev); | |
f646cf94 TO |
2980 | |
2981 | dev->connected = 1; | |
2982 | return 0; | |
2983 | } | |
f646cf94 | 2984 | |
22835b80 | 2985 | static int pch_udc_stop(struct usb_gadget *g) |
f646cf94 | 2986 | { |
1fb3b1cf | 2987 | struct pch_udc_dev *dev = to_pch_udc(g); |
f646cf94 TO |
2988 | |
2989 | pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK); | |
2990 | ||
15680cdf | 2991 | /* Assures that there are no pending requests with this driver */ |
f646cf94 TO |
2992 | dev->driver = NULL; |
2993 | dev->connected = 0; | |
2994 | ||
2995 | /* set SD */ | |
2996 | pch_udc_set_disconnect(dev); | |
1fb3b1cf | 2997 | |
f646cf94 TO |
2998 | return 0; |
2999 | } | |
f646cf94 TO |
3000 | |
3001 | static void pch_udc_shutdown(struct pci_dev *pdev) | |
3002 | { | |
3003 | struct pch_udc_dev *dev = pci_get_drvdata(pdev); | |
3004 | ||
3005 | pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK); | |
3006 | pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL); | |
3007 | ||
3008 | /* disable the pullup so the host will think we're gone */ | |
3009 | pch_udc_set_disconnect(dev); | |
3010 | } | |
3011 | ||
3012 | static void pch_udc_remove(struct pci_dev *pdev) | |
3013 | { | |
3014 | struct pch_udc_dev *dev = pci_get_drvdata(pdev); | |
3015 | ||
0f91349b SAS |
3016 | usb_del_gadget_udc(&dev->gadget); |
3017 | ||
f646cf94 TO |
3018 | /* gadget driver must not be registered */ |
3019 | if (dev->driver) | |
3020 | dev_err(&pdev->dev, | |
3021 | "%s: gadget driver still bound!!!\n", __func__); | |
3022 | /* dma pool cleanup */ | |
3023 | if (dev->data_requests) | |
3024 | pci_pool_destroy(dev->data_requests); | |
3025 | ||
3026 | if (dev->stp_requests) { | |
3027 | /* cleanup DMA desc's for ep0in */ | |
3028 | if (dev->ep[UDC_EP0OUT_IDX].td_stp) { | |
3029 | pci_pool_free(dev->stp_requests, | |
3030 | dev->ep[UDC_EP0OUT_IDX].td_stp, | |
3031 | dev->ep[UDC_EP0OUT_IDX].td_stp_phys); | |
3032 | } | |
3033 | if (dev->ep[UDC_EP0OUT_IDX].td_data) { | |
3034 | pci_pool_free(dev->stp_requests, | |
3035 | dev->ep[UDC_EP0OUT_IDX].td_data, | |
3036 | dev->ep[UDC_EP0OUT_IDX].td_data_phys); | |
3037 | } | |
3038 | pci_pool_destroy(dev->stp_requests); | |
3039 | } | |
3040 | ||
abab0c67 TO |
3041 | if (dev->dma_addr) |
3042 | dma_unmap_single(&dev->pdev->dev, dev->dma_addr, | |
3043 | UDC_EP0OUT_BUFF_SIZE * 4, DMA_FROM_DEVICE); | |
abab0c67 | 3044 | |
dd63180b TM |
3045 | pch_vbus_gpio_free(dev); |
3046 | ||
f646cf94 | 3047 | pch_udc_exit(dev); |
f646cf94 TO |
3048 | } |
3049 | ||
5e3bd45f AS |
3050 | #ifdef CONFIG_PM_SLEEP |
3051 | static int pch_udc_suspend(struct device *d) | |
f646cf94 | 3052 | { |
5e3bd45f | 3053 | struct pci_dev *pdev = to_pci_dev(d); |
f646cf94 TO |
3054 | struct pch_udc_dev *dev = pci_get_drvdata(pdev); |
3055 | ||
3056 | pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK); | |
3057 | pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL); | |
3058 | ||
f646cf94 TO |
3059 | return 0; |
3060 | } | |
3061 | ||
5e3bd45f | 3062 | static int pch_udc_resume(struct device *d) |
f646cf94 | 3063 | { |
f646cf94 TO |
3064 | return 0; |
3065 | } | |
5e3bd45f AS |
3066 | |
3067 | static SIMPLE_DEV_PM_OPS(pch_udc_pm, pch_udc_suspend, pch_udc_resume); | |
3068 | #define PCH_UDC_PM_OPS (&pch_udc_pm) | |
f646cf94 | 3069 | #else |
5e3bd45f AS |
3070 | #define PCH_UDC_PM_OPS NULL |
3071 | #endif /* CONFIG_PM_SLEEP */ | |
f646cf94 TO |
3072 | |
3073 | static int pch_udc_probe(struct pci_dev *pdev, | |
3074 | const struct pci_device_id *id) | |
3075 | { | |
969733f3 | 3076 | int bar; |
f646cf94 TO |
3077 | int retval; |
3078 | struct pch_udc_dev *dev; | |
3079 | ||
f646cf94 | 3080 | /* init */ |
969733f3 AS |
3081 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
3082 | if (!dev) | |
f646cf94 | 3083 | return -ENOMEM; |
969733f3 | 3084 | |
f646cf94 | 3085 | /* pci setup */ |
969733f3 AS |
3086 | retval = pcim_enable_device(pdev); |
3087 | if (retval) | |
3088 | return retval; | |
3089 | ||
f646cf94 TO |
3090 | pci_set_drvdata(pdev, dev); |
3091 | ||
a68df706 BD |
3092 | /* Determine BAR based on PCI ID */ |
3093 | if (id->device == PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC) | |
969733f3 | 3094 | bar = PCH_UDC_PCI_BAR_QUARK_X1000; |
a68df706 | 3095 | else |
969733f3 | 3096 | bar = PCH_UDC_PCI_BAR; |
a68df706 | 3097 | |
f646cf94 | 3098 | /* PCI resource allocation */ |
969733f3 AS |
3099 | retval = pcim_iomap_regions(pdev, 1 << bar, pci_name(pdev)); |
3100 | if (retval) | |
3101 | return retval; | |
f646cf94 | 3102 | |
969733f3 | 3103 | dev->base_addr = pcim_iomap_table(pdev)[bar]; |
f646cf94 | 3104 | |
f646cf94 | 3105 | /* initialize the hardware */ |
969733f3 AS |
3106 | if (pch_udc_pcd_init(dev)) |
3107 | return -ENODEV; | |
3108 | ||
c7b640d2 AS |
3109 | pci_enable_msi(pdev); |
3110 | ||
969733f3 AS |
3111 | retval = devm_request_irq(&pdev->dev, pdev->irq, pch_udc_isr, |
3112 | IRQF_SHARED, KBUILD_MODNAME, dev); | |
3113 | if (retval) { | |
f646cf94 TO |
3114 | dev_err(&pdev->dev, "%s: request_irq(%d) fail\n", __func__, |
3115 | pdev->irq); | |
f646cf94 TO |
3116 | goto finished; |
3117 | } | |
f646cf94 TO |
3118 | |
3119 | pci_set_master(pdev); | |
3120 | pci_try_set_mwi(pdev); | |
3121 | ||
3122 | /* device struct setup */ | |
3123 | spin_lock_init(&dev->lock); | |
3124 | dev->pdev = pdev; | |
3125 | dev->gadget.ops = &pch_udc_ops; | |
3126 | ||
3127 | retval = init_dma_pools(dev); | |
3128 | if (retval) | |
3129 | goto finished; | |
3130 | ||
f646cf94 | 3131 | dev->gadget.name = KBUILD_MODNAME; |
d327ab5b | 3132 | dev->gadget.max_speed = USB_SPEED_HIGH; |
f646cf94 TO |
3133 | |
3134 | /* Put the device in disconnected state till a driver is bound */ | |
3135 | pch_udc_set_disconnect(dev); | |
097aa197 | 3136 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
0f91349b SAS |
3137 | if (retval) |
3138 | goto finished; | |
f646cf94 TO |
3139 | return 0; |
3140 | ||
3141 | finished: | |
3142 | pch_udc_remove(pdev); | |
3143 | return retval; | |
3144 | } | |
3145 | ||
ea25c37e | 3146 | static const struct pci_device_id pch_udc_pcidev_id[] = { |
a68df706 BD |
3147 | { |
3148 | PCI_DEVICE(PCI_VENDOR_ID_INTEL, | |
3149 | PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC), | |
7b78f48a | 3150 | .class = PCI_CLASS_SERIAL_USB_DEVICE, |
a68df706 BD |
3151 | .class_mask = 0xffffffff, |
3152 | }, | |
f646cf94 TO |
3153 | { |
3154 | PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EG20T_UDC), | |
7b78f48a | 3155 | .class = PCI_CLASS_SERIAL_USB_DEVICE, |
f646cf94 TO |
3156 | .class_mask = 0xffffffff, |
3157 | }, | |
06f1b971 TM |
3158 | { |
3159 | PCI_DEVICE(PCI_VENDOR_ID_ROHM, PCI_DEVICE_ID_ML7213_IOH_UDC), | |
7b78f48a | 3160 | .class = PCI_CLASS_SERIAL_USB_DEVICE, |
06f1b971 TM |
3161 | .class_mask = 0xffffffff, |
3162 | }, | |
731ad81e TM |
3163 | { |
3164 | PCI_DEVICE(PCI_VENDOR_ID_ROHM, PCI_DEVICE_ID_ML7831_IOH_UDC), | |
7b78f48a | 3165 | .class = PCI_CLASS_SERIAL_USB_DEVICE, |
731ad81e TM |
3166 | .class_mask = 0xffffffff, |
3167 | }, | |
f646cf94 TO |
3168 | { 0 }, |
3169 | }; | |
3170 | ||
3171 | MODULE_DEVICE_TABLE(pci, pch_udc_pcidev_id); | |
3172 | ||
f646cf94 TO |
3173 | static struct pci_driver pch_udc_driver = { |
3174 | .name = KBUILD_MODNAME, | |
3175 | .id_table = pch_udc_pcidev_id, | |
3176 | .probe = pch_udc_probe, | |
3177 | .remove = pch_udc_remove, | |
f646cf94 | 3178 | .shutdown = pch_udc_shutdown, |
5e3bd45f AS |
3179 | .driver = { |
3180 | .pm = PCH_UDC_PM_OPS, | |
3181 | }, | |
f646cf94 TO |
3182 | }; |
3183 | ||
3cdb7721 | 3184 | module_pci_driver(pch_udc_driver); |
f646cf94 TO |
3185 | |
3186 | MODULE_DESCRIPTION("Intel EG20T USB Device Controller"); | |
09b658dc | 3187 | MODULE_AUTHOR("LAPIS Semiconductor, <tomoya-linux@dsn.lapis-semi.com>"); |
f646cf94 | 3188 | MODULE_LICENSE("GPL"); |