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efdd7319 RH |
1 | /* |
2 | * Copyright 2010-2011 Calxeda, Inc. | |
3 | * | |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
efdd7319 | 5 | */ |
1a459660 | 6 | |
efdd7319 RH |
7 | #include <common.h> |
8 | #include <malloc.h> | |
d821ad4a | 9 | #include <linux/compiler.h> |
efdd7319 RH |
10 | #include <linux/err.h> |
11 | #include <asm/io.h> | |
12 | ||
13 | #define TX_NUM_DESC 1 | |
14 | #define RX_NUM_DESC 32 | |
15 | ||
16 | #define MAC_TIMEOUT (5*CONFIG_SYS_HZ) | |
17 | ||
18 | #define ETH_BUF_SZ 2048 | |
19 | #define TX_BUF_SZ (ETH_BUF_SZ * TX_NUM_DESC) | |
20 | #define RX_BUF_SZ (ETH_BUF_SZ * RX_NUM_DESC) | |
21 | ||
22 | #define RXSTART 0x00000002 | |
23 | #define TXSTART 0x00002000 | |
24 | ||
25 | #define RXENABLE 0x00000004 | |
26 | #define TXENABLE 0x00000008 | |
27 | ||
28 | #define XGMAC_CONTROL_SPD 0x40000000 | |
29 | #define XGMAC_CONTROL_SPD_MASK 0x60000000 | |
30 | #define XGMAC_CONTROL_SARC 0x10000000 | |
31 | #define XGMAC_CONTROL_SARK_MASK 0x18000000 | |
32 | #define XGMAC_CONTROL_CAR 0x04000000 | |
33 | #define XGMAC_CONTROL_CAR_MASK 0x06000000 | |
34 | #define XGMAC_CONTROL_CAR_SHIFT 25 | |
35 | #define XGMAC_CONTROL_DP 0x01000000 | |
36 | #define XGMAC_CONTROL_WD 0x00800000 | |
37 | #define XGMAC_CONTROL_JD 0x00400000 | |
38 | #define XGMAC_CONTROL_JE 0x00100000 | |
39 | #define XGMAC_CONTROL_LM 0x00001000 | |
40 | #define XGMAC_CONTROL_IPC 0x00000400 | |
41 | #define XGMAC_CONTROL_ACS 0x00000080 | |
42 | #define XGMAC_CONTROL_DDIC 0x00000010 | |
43 | #define XGMAC_CONTROL_TE 0x00000008 | |
44 | #define XGMAC_CONTROL_RE 0x00000004 | |
45 | ||
46 | #define XGMAC_DMA_BUSMODE_RESET 0x00000001 | |
47 | #define XGMAC_DMA_BUSMODE_DSL 0x00000004 | |
48 | #define XGMAC_DMA_BUSMODE_DSL_MASK 0x0000007c | |
49 | #define XGMAC_DMA_BUSMODE_DSL_SHIFT 2 | |
50 | #define XGMAC_DMA_BUSMODE_ATDS 0x00000080 | |
51 | #define XGMAC_DMA_BUSMODE_PBL_MASK 0x00003f00 | |
52 | #define XGMAC_DMA_BUSMODE_PBL_SHIFT 8 | |
53 | #define XGMAC_DMA_BUSMODE_FB 0x00010000 | |
54 | #define XGMAC_DMA_BUSMODE_USP 0x00800000 | |
55 | #define XGMAC_DMA_BUSMODE_8PBL 0x01000000 | |
56 | #define XGMAC_DMA_BUSMODE_AAL 0x02000000 | |
57 | ||
58 | #define XGMAC_DMA_AXIMODE_ENLPI 0x80000000 | |
59 | #define XGMAC_DMA_AXIMODE_MGK 0x40000000 | |
60 | #define XGMAC_DMA_AXIMODE_WROSR 0x00100000 | |
61 | #define XGMAC_DMA_AXIMODE_WROSR_MASK 0x00F00000 | |
62 | #define XGMAC_DMA_AXIMODE_WROSR_SHIFT 20 | |
63 | #define XGMAC_DMA_AXIMODE_RDOSR 0x00010000 | |
64 | #define XGMAC_DMA_AXIMODE_RDOSR_MASK 0x000F0000 | |
65 | #define XGMAC_DMA_AXIMODE_RDOSR_SHIFT 16 | |
66 | #define XGMAC_DMA_AXIMODE_AAL 0x00001000 | |
67 | #define XGMAC_DMA_AXIMODE_BLEN256 0x00000080 | |
68 | #define XGMAC_DMA_AXIMODE_BLEN128 0x00000040 | |
69 | #define XGMAC_DMA_AXIMODE_BLEN64 0x00000020 | |
70 | #define XGMAC_DMA_AXIMODE_BLEN32 0x00000010 | |
71 | #define XGMAC_DMA_AXIMODE_BLEN16 0x00000008 | |
72 | #define XGMAC_DMA_AXIMODE_BLEN8 0x00000004 | |
73 | #define XGMAC_DMA_AXIMODE_BLEN4 0x00000002 | |
74 | #define XGMAC_DMA_AXIMODE_UNDEF 0x00000001 | |
75 | ||
76 | #define XGMAC_CORE_OMR_RTC_SHIFT 3 | |
77 | #define XGMAC_CORE_OMR_RTC_MASK 0x00000018 | |
78 | #define XGMAC_CORE_OMR_RTC 0x00000010 | |
79 | #define XGMAC_CORE_OMR_RSF 0x00000020 | |
80 | #define XGMAC_CORE_OMR_DT 0x00000040 | |
81 | #define XGMAC_CORE_OMR_FEF 0x00000080 | |
82 | #define XGMAC_CORE_OMR_EFC 0x00000100 | |
83 | #define XGMAC_CORE_OMR_RFA_SHIFT 9 | |
84 | #define XGMAC_CORE_OMR_RFA_MASK 0x00000E00 | |
85 | #define XGMAC_CORE_OMR_RFD_SHIFT 12 | |
86 | #define XGMAC_CORE_OMR_RFD_MASK 0x00007000 | |
87 | #define XGMAC_CORE_OMR_TTC_SHIFT 16 | |
88 | #define XGMAC_CORE_OMR_TTC_MASK 0x00030000 | |
89 | #define XGMAC_CORE_OMR_TTC 0x00020000 | |
90 | #define XGMAC_CORE_OMR_FTF 0x00100000 | |
91 | #define XGMAC_CORE_OMR_TSF 0x00200000 | |
92 | ||
93 | #define FIFO_MINUS_1K 0x0 | |
94 | #define FIFO_MINUS_2K 0x1 | |
95 | #define FIFO_MINUS_3K 0x2 | |
96 | #define FIFO_MINUS_4K 0x3 | |
97 | #define FIFO_MINUS_6K 0x4 | |
98 | #define FIFO_MINUS_8K 0x5 | |
99 | #define FIFO_MINUS_12K 0x6 | |
100 | #define FIFO_MINUS_16K 0x7 | |
101 | ||
102 | #define XGMAC_CORE_FLOW_PT_SHIFT 16 | |
103 | #define XGMAC_CORE_FLOW_PT_MASK 0xFFFF0000 | |
104 | #define XGMAC_CORE_FLOW_PT 0x00010000 | |
105 | #define XGMAC_CORE_FLOW_DZQP 0x00000080 | |
106 | #define XGMAC_CORE_FLOW_PLT_SHIFT 4 | |
107 | #define XGMAC_CORE_FLOW_PLT_MASK 0x00000030 | |
108 | #define XGMAC_CORE_FLOW_PLT 0x00000010 | |
109 | #define XGMAC_CORE_FLOW_UP 0x00000008 | |
110 | #define XGMAC_CORE_FLOW_RFE 0x00000004 | |
111 | #define XGMAC_CORE_FLOW_TFE 0x00000002 | |
112 | #define XGMAC_CORE_FLOW_FCB 0x00000001 | |
113 | ||
114 | /* XGMAC Descriptor Defines */ | |
115 | #define MAX_DESC_BUF_SZ (0x2000 - 8) | |
116 | ||
117 | #define RXDESC_EXT_STATUS 0x00000001 | |
118 | #define RXDESC_CRC_ERR 0x00000002 | |
119 | #define RXDESC_RX_ERR 0x00000008 | |
120 | #define RXDESC_RX_WDOG 0x00000010 | |
121 | #define RXDESC_FRAME_TYPE 0x00000020 | |
122 | #define RXDESC_GIANT_FRAME 0x00000080 | |
123 | #define RXDESC_LAST_SEG 0x00000100 | |
124 | #define RXDESC_FIRST_SEG 0x00000200 | |
125 | #define RXDESC_VLAN_FRAME 0x00000400 | |
126 | #define RXDESC_OVERFLOW_ERR 0x00000800 | |
127 | #define RXDESC_LENGTH_ERR 0x00001000 | |
128 | #define RXDESC_SA_FILTER_FAIL 0x00002000 | |
129 | #define RXDESC_DESCRIPTOR_ERR 0x00004000 | |
130 | #define RXDESC_ERROR_SUMMARY 0x00008000 | |
131 | #define RXDESC_FRAME_LEN_OFFSET 16 | |
132 | #define RXDESC_FRAME_LEN_MASK 0x3fff0000 | |
133 | #define RXDESC_DA_FILTER_FAIL 0x40000000 | |
134 | ||
135 | #define RXDESC1_END_RING 0x00008000 | |
136 | ||
137 | #define RXDESC_IP_PAYLOAD_MASK 0x00000003 | |
138 | #define RXDESC_IP_PAYLOAD_UDP 0x00000001 | |
139 | #define RXDESC_IP_PAYLOAD_TCP 0x00000002 | |
140 | #define RXDESC_IP_PAYLOAD_ICMP 0x00000003 | |
141 | #define RXDESC_IP_HEADER_ERR 0x00000008 | |
142 | #define RXDESC_IP_PAYLOAD_ERR 0x00000010 | |
143 | #define RXDESC_IPV4_PACKET 0x00000040 | |
144 | #define RXDESC_IPV6_PACKET 0x00000080 | |
145 | #define TXDESC_UNDERFLOW_ERR 0x00000001 | |
146 | #define TXDESC_JABBER_TIMEOUT 0x00000002 | |
147 | #define TXDESC_LOCAL_FAULT 0x00000004 | |
148 | #define TXDESC_REMOTE_FAULT 0x00000008 | |
149 | #define TXDESC_VLAN_FRAME 0x00000010 | |
150 | #define TXDESC_FRAME_FLUSHED 0x00000020 | |
151 | #define TXDESC_IP_HEADER_ERR 0x00000040 | |
152 | #define TXDESC_PAYLOAD_CSUM_ERR 0x00000080 | |
153 | #define TXDESC_ERROR_SUMMARY 0x00008000 | |
154 | #define TXDESC_SA_CTRL_INSERT 0x00040000 | |
155 | #define TXDESC_SA_CTRL_REPLACE 0x00080000 | |
156 | #define TXDESC_2ND_ADDR_CHAINED 0x00100000 | |
157 | #define TXDESC_END_RING 0x00200000 | |
158 | #define TXDESC_CSUM_IP 0x00400000 | |
159 | #define TXDESC_CSUM_IP_PAYLD 0x00800000 | |
160 | #define TXDESC_CSUM_ALL 0x00C00000 | |
161 | #define TXDESC_CRC_EN_REPLACE 0x01000000 | |
162 | #define TXDESC_CRC_EN_APPEND 0x02000000 | |
163 | #define TXDESC_DISABLE_PAD 0x04000000 | |
164 | #define TXDESC_FIRST_SEG 0x10000000 | |
165 | #define TXDESC_LAST_SEG 0x20000000 | |
166 | #define TXDESC_INTERRUPT 0x40000000 | |
167 | ||
168 | #define DESC_OWN 0x80000000 | |
169 | #define DESC_BUFFER1_SZ_MASK 0x00001fff | |
170 | #define DESC_BUFFER2_SZ_MASK 0x1fff0000 | |
171 | #define DESC_BUFFER2_SZ_OFFSET 16 | |
172 | ||
173 | struct xgmac_regs { | |
174 | u32 config; | |
175 | u32 framefilter; | |
176 | u32 resv_1[4]; | |
177 | u32 flow_control; | |
178 | u32 vlantag; | |
179 | u32 version; | |
180 | u32 vlaninclude; | |
181 | u32 resv_2[2]; | |
182 | u32 pacestretch; | |
183 | u32 vlanhash; | |
184 | u32 resv_3; | |
185 | u32 intreg; | |
186 | struct { | |
187 | u32 hi; /* 0x40 */ | |
188 | u32 lo; /* 0x44 */ | |
189 | } macaddr[16]; | |
190 | u32 resv_4[0xd0]; | |
191 | u32 core_opmode; /* 0x400 */ | |
192 | u32 resv_5[0x2bf]; | |
193 | u32 busmode; /* 0xf00 */ | |
194 | u32 txpoll; | |
195 | u32 rxpoll; | |
196 | u32 rxdesclist; | |
197 | u32 txdesclist; | |
198 | u32 dma_status; | |
199 | u32 dma_opmode; | |
200 | u32 intenable; | |
201 | u32 resv_6[2]; | |
202 | u32 axi_mode; /* 0xf28 */ | |
203 | }; | |
204 | ||
205 | struct xgmac_dma_desc { | |
206 | __le32 flags; | |
207 | __le32 buf_size; | |
208 | __le32 buf1_addr; /* Buffer 1 Address Pointer */ | |
209 | __le32 buf2_addr; /* Buffer 2 Address Pointer */ | |
210 | __le32 ext_status; | |
211 | __le32 res[3]; | |
212 | }; | |
213 | ||
214 | /* XGMAC Descriptor Access Helpers */ | |
215 | static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz) | |
216 | { | |
217 | if (buf_sz > MAX_DESC_BUF_SZ) | |
218 | p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ | | |
219 | (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET); | |
220 | else | |
221 | p->buf_size = cpu_to_le32(buf_sz); | |
222 | } | |
223 | ||
224 | static inline int desc_get_buf_len(struct xgmac_dma_desc *p) | |
225 | { | |
226 | u32 len = le32_to_cpu(p->buf_size); | |
227 | return (len & DESC_BUFFER1_SZ_MASK) + | |
228 | ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET); | |
229 | } | |
230 | ||
231 | static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size, | |
232 | int buf_sz) | |
233 | { | |
234 | struct xgmac_dma_desc *end = p + ring_size - 1; | |
235 | ||
236 | memset(p, 0, sizeof(*p) * ring_size); | |
237 | ||
238 | for (; p <= end; p++) | |
239 | desc_set_buf_len(p, buf_sz); | |
240 | ||
241 | end->buf_size |= cpu_to_le32(RXDESC1_END_RING); | |
242 | } | |
243 | ||
244 | static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size) | |
245 | { | |
246 | memset(p, 0, sizeof(*p) * ring_size); | |
247 | p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING); | |
248 | } | |
249 | ||
250 | static inline int desc_get_owner(struct xgmac_dma_desc *p) | |
251 | { | |
252 | return le32_to_cpu(p->flags) & DESC_OWN; | |
253 | } | |
254 | ||
255 | static inline void desc_set_rx_owner(struct xgmac_dma_desc *p) | |
256 | { | |
257 | /* Clear all fields and set the owner */ | |
258 | p->flags = cpu_to_le32(DESC_OWN); | |
259 | } | |
260 | ||
261 | static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags) | |
262 | { | |
263 | u32 tmpflags = le32_to_cpu(p->flags); | |
264 | tmpflags &= TXDESC_END_RING; | |
265 | tmpflags |= flags | DESC_OWN; | |
266 | p->flags = cpu_to_le32(tmpflags); | |
267 | } | |
268 | ||
269 | static inline void *desc_get_buf_addr(struct xgmac_dma_desc *p) | |
270 | { | |
271 | return (void *)le32_to_cpu(p->buf1_addr); | |
272 | } | |
273 | ||
274 | static inline void desc_set_buf_addr(struct xgmac_dma_desc *p, | |
275 | void *paddr, int len) | |
276 | { | |
277 | p->buf1_addr = cpu_to_le32(paddr); | |
278 | if (len > MAX_DESC_BUF_SZ) | |
279 | p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ); | |
280 | } | |
281 | ||
282 | static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p, | |
283 | void *paddr, int len) | |
284 | { | |
285 | desc_set_buf_len(p, len); | |
286 | desc_set_buf_addr(p, paddr, len); | |
287 | } | |
288 | ||
289 | static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p) | |
290 | { | |
291 | u32 data = le32_to_cpu(p->flags); | |
292 | u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET; | |
293 | if (data & RXDESC_FRAME_TYPE) | |
294 | len -= 4; | |
295 | ||
296 | return len; | |
297 | } | |
298 | ||
299 | struct calxeda_eth_dev { | |
300 | struct xgmac_dma_desc rx_chain[RX_NUM_DESC]; | |
301 | struct xgmac_dma_desc tx_chain[TX_NUM_DESC]; | |
302 | char rxbuffer[RX_BUF_SZ]; | |
303 | ||
304 | u32 tx_currdesc; | |
305 | u32 rx_currdesc; | |
306 | ||
307 | struct eth_device *dev; | |
308 | } __aligned(32); | |
309 | ||
310 | /* | |
311 | * Initialize a descriptor ring. Calxeda XGMAC is configured to use | |
312 | * advanced descriptors. | |
313 | */ | |
314 | ||
315 | static void init_rx_desc(struct calxeda_eth_dev *priv) | |
316 | { | |
317 | struct xgmac_dma_desc *rxdesc = priv->rx_chain; | |
318 | struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase; | |
319 | void *rxbuffer = priv->rxbuffer; | |
320 | int i; | |
321 | ||
322 | desc_init_rx_desc(rxdesc, RX_NUM_DESC, ETH_BUF_SZ); | |
323 | writel((ulong)rxdesc, ®s->rxdesclist); | |
324 | ||
325 | for (i = 0; i < RX_NUM_DESC; i++) { | |
326 | desc_set_buf_addr(rxdesc + i, rxbuffer + (i * ETH_BUF_SZ), | |
327 | ETH_BUF_SZ); | |
328 | desc_set_rx_owner(rxdesc + i); | |
329 | } | |
330 | } | |
331 | ||
332 | static void init_tx_desc(struct calxeda_eth_dev *priv) | |
333 | { | |
334 | struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase; | |
335 | ||
336 | desc_init_tx_desc(priv->tx_chain, TX_NUM_DESC); | |
337 | writel((ulong)priv->tx_chain, ®s->txdesclist); | |
338 | } | |
339 | ||
340 | static int xgmac_reset(struct eth_device *dev) | |
341 | { | |
342 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
343 | int timeout = MAC_TIMEOUT; | |
344 | u32 value; | |
345 | ||
346 | value = readl(®s->config) & XGMAC_CONTROL_SPD_MASK; | |
347 | ||
348 | writel(XGMAC_DMA_BUSMODE_RESET, ®s->busmode); | |
349 | while ((timeout-- >= 0) && | |
350 | (readl(®s->busmode) & XGMAC_DMA_BUSMODE_RESET)) | |
351 | udelay(1); | |
352 | ||
353 | writel(value, ®s->config); | |
354 | ||
355 | return timeout; | |
356 | } | |
357 | ||
358 | static void xgmac_hwmacaddr(struct eth_device *dev) | |
359 | { | |
360 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
361 | u32 macaddr[2]; | |
362 | ||
363 | memcpy(macaddr, dev->enetaddr, 6); | |
364 | writel(macaddr[1], ®s->macaddr[0].hi); | |
365 | writel(macaddr[0], ®s->macaddr[0].lo); | |
366 | } | |
367 | ||
368 | static int xgmac_init(struct eth_device *dev, bd_t * bis) | |
369 | { | |
370 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
371 | struct calxeda_eth_dev *priv = dev->priv; | |
372 | int value; | |
373 | ||
374 | if (xgmac_reset(dev) < 0) | |
375 | return -1; | |
376 | ||
377 | /* set the hardware MAC address */ | |
378 | xgmac_hwmacaddr(dev); | |
379 | ||
380 | /* set the AXI bus modes */ | |
381 | value = XGMAC_DMA_BUSMODE_ATDS | | |
382 | (16 << XGMAC_DMA_BUSMODE_PBL_SHIFT) | | |
383 | XGMAC_DMA_BUSMODE_FB | XGMAC_DMA_BUSMODE_AAL; | |
384 | writel(value, ®s->busmode); | |
385 | ||
386 | value = XGMAC_DMA_AXIMODE_AAL | XGMAC_DMA_AXIMODE_BLEN16 | | |
387 | XGMAC_DMA_AXIMODE_BLEN8 | XGMAC_DMA_AXIMODE_BLEN4; | |
388 | writel(value, ®s->axi_mode); | |
389 | ||
390 | /* set flow control parameters and store and forward mode */ | |
391 | value = (FIFO_MINUS_12K << XGMAC_CORE_OMR_RFD_SHIFT) | | |
392 | (FIFO_MINUS_4K << XGMAC_CORE_OMR_RFA_SHIFT) | | |
393ee7f3 | 393 | XGMAC_CORE_OMR_EFC | XGMAC_CORE_OMR_TSF; |
efdd7319 RH |
394 | writel(value, ®s->core_opmode); |
395 | ||
396 | /* enable pause frames */ | |
397 | value = (1024 << XGMAC_CORE_FLOW_PT_SHIFT) | | |
398 | (1 << XGMAC_CORE_FLOW_PLT_SHIFT) | | |
399 | XGMAC_CORE_FLOW_UP | XGMAC_CORE_FLOW_RFE | XGMAC_CORE_FLOW_TFE; | |
400 | writel(value, ®s->flow_control); | |
401 | ||
402 | /* Initialize the descriptor chains */ | |
403 | init_rx_desc(priv); | |
404 | init_tx_desc(priv); | |
405 | ||
406 | /* must set to 0, or when started up will cause issues */ | |
407 | priv->tx_currdesc = 0; | |
408 | priv->rx_currdesc = 0; | |
409 | ||
410 | /* set default core values */ | |
411 | value = readl(®s->config); | |
412 | value &= XGMAC_CONTROL_SPD_MASK; | |
413 | value |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_ACS | | |
414 | XGMAC_CONTROL_IPC | XGMAC_CONTROL_CAR; | |
415 | ||
416 | /* Everything is ready enable both mac and DMA */ | |
417 | value |= RXENABLE | TXENABLE; | |
418 | writel(value, ®s->config); | |
419 | ||
420 | value = readl(®s->dma_opmode); | |
421 | value |= RXSTART | TXSTART; | |
422 | writel(value, ®s->dma_opmode); | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
4ec45248 | 427 | static int xgmac_tx(struct eth_device *dev, void *packet, int length) |
efdd7319 RH |
428 | { |
429 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
430 | struct calxeda_eth_dev *priv = dev->priv; | |
431 | u32 currdesc = priv->tx_currdesc; | |
432 | struct xgmac_dma_desc *txdesc = &priv->tx_chain[currdesc]; | |
433 | int timeout; | |
434 | ||
4ec45248 | 435 | desc_set_buf_addr_and_size(txdesc, packet, length); |
efdd7319 RH |
436 | desc_set_tx_owner(txdesc, TXDESC_FIRST_SEG | |
437 | TXDESC_LAST_SEG | TXDESC_CRC_EN_APPEND); | |
438 | ||
439 | /* write poll demand */ | |
440 | writel(1, ®s->txpoll); | |
441 | ||
442 | timeout = 1000000; | |
443 | while (desc_get_owner(txdesc)) { | |
444 | if (timeout-- < 0) { | |
445 | printf("xgmac: TX timeout\n"); | |
446 | return -ETIMEDOUT; | |
447 | } | |
448 | udelay(1); | |
449 | } | |
450 | ||
451 | priv->tx_currdesc = (currdesc + 1) & (TX_NUM_DESC - 1); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static int xgmac_rx(struct eth_device *dev) | |
456 | { | |
457 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
458 | struct calxeda_eth_dev *priv = dev->priv; | |
459 | u32 currdesc = priv->rx_currdesc; | |
460 | struct xgmac_dma_desc *rxdesc = &priv->rx_chain[currdesc]; | |
461 | int length = 0; | |
462 | ||
463 | /* check if the host has the desc */ | |
464 | if (desc_get_owner(rxdesc)) | |
465 | return -1; /* something bad happened */ | |
466 | ||
467 | length = desc_get_rx_frame_len(rxdesc); | |
468 | ||
1fd92db8 | 469 | net_process_received_packet(desc_get_buf_addr(rxdesc), length); |
efdd7319 RH |
470 | |
471 | /* set descriptor back to owned by XGMAC */ | |
472 | desc_set_rx_owner(rxdesc); | |
473 | writel(1, ®s->rxpoll); | |
474 | ||
475 | priv->rx_currdesc = (currdesc + 1) & (RX_NUM_DESC - 1); | |
476 | ||
477 | return length; | |
478 | } | |
479 | ||
480 | static void xgmac_halt(struct eth_device *dev) | |
481 | { | |
482 | struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase; | |
483 | struct calxeda_eth_dev *priv = dev->priv; | |
484 | int value; | |
485 | ||
486 | /* Disable TX/RX */ | |
487 | value = readl(®s->config); | |
488 | value &= ~(RXENABLE | TXENABLE); | |
489 | writel(value, ®s->config); | |
490 | ||
491 | /* Disable DMA */ | |
492 | value = readl(®s->dma_opmode); | |
493 | value &= ~(RXSTART | TXSTART); | |
494 | writel(value, ®s->dma_opmode); | |
495 | ||
496 | /* must set to 0, or when started up will cause issues */ | |
497 | priv->tx_currdesc = 0; | |
498 | priv->rx_currdesc = 0; | |
499 | } | |
500 | ||
501 | int calxedaxgmac_initialize(u32 id, ulong base_addr) | |
502 | { | |
503 | struct eth_device *dev; | |
504 | struct calxeda_eth_dev *priv; | |
505 | struct xgmac_regs *regs; | |
506 | u32 macaddr[2]; | |
507 | ||
508 | regs = (struct xgmac_regs *)base_addr; | |
509 | ||
510 | /* check hardware version */ | |
511 | if (readl(®s->version) != 0x1012) | |
512 | return -1; | |
513 | ||
514 | dev = malloc(sizeof(*dev)); | |
515 | if (!dev) | |
516 | return 0; | |
517 | memset(dev, 0, sizeof(*dev)); | |
518 | ||
519 | /* Structure must be aligned, because it contains the descriptors */ | |
520 | priv = memalign(32, sizeof(*priv)); | |
521 | if (!priv) { | |
522 | free(dev); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | dev->iobase = (int)base_addr; | |
527 | dev->priv = priv; | |
528 | priv->dev = dev; | |
529 | sprintf(dev->name, "xgmac%d", id); | |
530 | ||
531 | /* The MAC address is already configured, so read it from registers. */ | |
532 | macaddr[1] = readl(®s->macaddr[0].hi); | |
533 | macaddr[0] = readl(®s->macaddr[0].lo); | |
534 | memcpy(dev->enetaddr, macaddr, 6); | |
535 | ||
536 | dev->init = xgmac_init; | |
537 | dev->send = xgmac_tx; | |
538 | dev->recv = xgmac_rx; | |
539 | dev->halt = xgmac_halt; | |
540 | ||
541 | eth_register(dev); | |
542 | ||
543 | return 1; | |
544 | } |