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1 | /* | |
2 | * (C) Copyright 2009, 2011, 2016 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB | |
5 | * | |
6 | * Author: Tor Krill tor@excito.com | |
7 | * | |
8 | * SPDX-License-Identifier: GPL-2.0+ | |
9 | */ | |
10 | ||
11 | #include <common.h> | |
12 | #include <pci.h> | |
13 | #include <usb.h> | |
14 | #include <asm/io.h> | |
15 | #include <usb/ehci-ci.h> | |
16 | #include <hwconfig.h> | |
17 | #include <fsl_usb.h> | |
18 | #include <fdt_support.h> | |
19 | #include <dm.h> | |
20 | ||
21 | #include "ehci.h" | |
22 | ||
23 | DECLARE_GLOBAL_DATA_PTR; | |
24 | ||
25 | #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT | |
26 | #define CONFIG_USB_MAX_CONTROLLER_COUNT 1 | |
27 | #endif | |
28 | ||
29 | #ifdef CONFIG_DM_USB | |
30 | struct ehci_fsl_priv { | |
31 | struct ehci_ctrl ehci; | |
32 | fdt_addr_t hcd_base; | |
33 | char *phy_type; | |
34 | }; | |
35 | #endif | |
36 | ||
37 | static void set_txfifothresh(struct usb_ehci *, u32); | |
38 | #ifdef CONFIG_DM_USB | |
39 | static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci, | |
40 | struct ehci_hccr *hccr, struct ehci_hcor *hcor); | |
41 | #else | |
42 | static int ehci_fsl_init(int index, struct usb_ehci *ehci, | |
43 | struct ehci_hccr *hccr, struct ehci_hcor *hcor); | |
44 | #endif | |
45 | ||
46 | /* Check USB PHY clock valid */ | |
47 | static int usb_phy_clk_valid(struct usb_ehci *ehci) | |
48 | { | |
49 | if (!((in_be32(&ehci->control) & PHY_CLK_VALID) || | |
50 | in_be32(&ehci->prictrl))) { | |
51 | printf("USB PHY clock invalid!\n"); | |
52 | return 0; | |
53 | } else { | |
54 | return 1; | |
55 | } | |
56 | } | |
57 | ||
58 | #ifdef CONFIG_DM_USB | |
59 | static int ehci_fsl_ofdata_to_platdata(struct udevice *dev) | |
60 | { | |
61 | struct ehci_fsl_priv *priv = dev_get_priv(dev); | |
62 | const void *prop; | |
63 | ||
64 | prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy_type", | |
65 | NULL); | |
66 | if (prop) { | |
67 | priv->phy_type = (char *)prop; | |
68 | debug("phy_type %s\n", priv->phy_type); | |
69 | } | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static int ehci_fsl_init_after_reset(struct ehci_ctrl *ctrl) | |
75 | { | |
76 | struct usb_ehci *ehci = NULL; | |
77 | struct ehci_fsl_priv *priv = container_of(ctrl, struct ehci_fsl_priv, | |
78 | ehci); | |
79 | ||
80 | ehci = (struct usb_ehci *)priv->hcd_base; | |
81 | if (ehci_fsl_init(priv, ehci, priv->ehci.hccr, priv->ehci.hcor) < 0) | |
82 | return -ENXIO; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | static const struct ehci_ops fsl_ehci_ops = { | |
88 | .init_after_reset = ehci_fsl_init_after_reset, | |
89 | }; | |
90 | ||
91 | static int ehci_fsl_probe(struct udevice *dev) | |
92 | { | |
93 | struct ehci_fsl_priv *priv = dev_get_priv(dev); | |
94 | struct usb_ehci *ehci = NULL; | |
95 | struct ehci_hccr *hccr; | |
96 | struct ehci_hcor *hcor; | |
97 | ||
98 | /* | |
99 | * Get the base address for EHCI controller from the device node | |
100 | */ | |
101 | priv->hcd_base = devfdt_get_addr(dev); | |
102 | if (priv->hcd_base == FDT_ADDR_T_NONE) { | |
103 | debug("Can't get the EHCI register base address\n"); | |
104 | return -ENXIO; | |
105 | } | |
106 | ehci = (struct usb_ehci *)priv->hcd_base; | |
107 | hccr = (struct ehci_hccr *)(&ehci->caplength); | |
108 | hcor = (struct ehci_hcor *) | |
109 | ((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); | |
110 | ||
111 | if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0) | |
112 | return -ENXIO; | |
113 | ||
114 | debug("ehci-fsl: init hccr %x and hcor %x hc_length %d\n", | |
115 | (u32)hccr, (u32)hcor, | |
116 | (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase))); | |
117 | ||
118 | return ehci_register(dev, hccr, hcor, &fsl_ehci_ops, 0, USB_INIT_HOST); | |
119 | } | |
120 | ||
121 | static const struct udevice_id ehci_usb_ids[] = { | |
122 | { .compatible = "fsl-usb2-mph", }, | |
123 | { .compatible = "fsl-usb2-dr", }, | |
124 | { } | |
125 | }; | |
126 | ||
127 | U_BOOT_DRIVER(ehci_fsl) = { | |
128 | .name = "ehci_fsl", | |
129 | .id = UCLASS_USB, | |
130 | .of_match = ehci_usb_ids, | |
131 | .ofdata_to_platdata = ehci_fsl_ofdata_to_platdata, | |
132 | .probe = ehci_fsl_probe, | |
133 | .remove = ehci_deregister, | |
134 | .ops = &ehci_usb_ops, | |
135 | .platdata_auto_alloc_size = sizeof(struct usb_platdata), | |
136 | .priv_auto_alloc_size = sizeof(struct ehci_fsl_priv), | |
137 | .flags = DM_FLAG_ALLOC_PRIV_DMA, | |
138 | }; | |
139 | #else | |
140 | /* | |
141 | * Create the appropriate control structures to manage | |
142 | * a new EHCI host controller. | |
143 | * | |
144 | * Excerpts from linux ehci fsl driver. | |
145 | */ | |
146 | int ehci_hcd_init(int index, enum usb_init_type init, | |
147 | struct ehci_hccr **hccr, struct ehci_hcor **hcor) | |
148 | { | |
149 | struct usb_ehci *ehci = NULL; | |
150 | ||
151 | switch (index) { | |
152 | case 0: | |
153 | ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR; | |
154 | break; | |
155 | case 1: | |
156 | ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR; | |
157 | break; | |
158 | default: | |
159 | printf("ERROR: wrong controller index!!\n"); | |
160 | return -EINVAL; | |
161 | }; | |
162 | ||
163 | *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); | |
164 | *hcor = (struct ehci_hcor *)((uint32_t) *hccr + | |
165 | HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); | |
166 | ||
167 | return ehci_fsl_init(index, ehci, *hccr, *hcor); | |
168 | } | |
169 | ||
170 | /* | |
171 | * Destroy the appropriate control structures corresponding | |
172 | * the the EHCI host controller. | |
173 | */ | |
174 | int ehci_hcd_stop(int index) | |
175 | { | |
176 | return 0; | |
177 | } | |
178 | #endif | |
179 | ||
180 | #ifdef CONFIG_DM_USB | |
181 | static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci, | |
182 | struct ehci_hccr *hccr, struct ehci_hcor *hcor) | |
183 | #else | |
184 | static int ehci_fsl_init(int index, struct usb_ehci *ehci, | |
185 | struct ehci_hccr *hccr, struct ehci_hcor *hcor) | |
186 | #endif | |
187 | { | |
188 | const char *phy_type = NULL; | |
189 | #ifndef CONFIG_DM_USB | |
190 | size_t len; | |
191 | char current_usb_controller[5]; | |
192 | #endif | |
193 | #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY | |
194 | char usb_phy[5]; | |
195 | ||
196 | usb_phy[0] = '\0'; | |
197 | #endif | |
198 | if (has_erratum_a007075()) { | |
199 | /* | |
200 | * A 5ms delay is needed after applying soft-reset to the | |
201 | * controller to let external ULPI phy come out of reset. | |
202 | * This delay needs to be added before re-initializing | |
203 | * the controller after soft-resetting completes | |
204 | */ | |
205 | mdelay(5); | |
206 | } | |
207 | ||
208 | /* Set to Host mode */ | |
209 | setbits_le32(&ehci->usbmode, CM_HOST); | |
210 | ||
211 | out_be32(&ehci->snoop1, SNOOP_SIZE_2GB); | |
212 | out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB); | |
213 | ||
214 | /* Init phy */ | |
215 | #ifdef CONFIG_DM_USB | |
216 | if (priv->phy_type) | |
217 | phy_type = priv->phy_type; | |
218 | #else | |
219 | memset(current_usb_controller, '\0', 5); | |
220 | snprintf(current_usb_controller, sizeof(current_usb_controller), | |
221 | "usb%d", index+1); | |
222 | ||
223 | if (hwconfig_sub(current_usb_controller, "phy_type")) | |
224 | phy_type = hwconfig_subarg(current_usb_controller, | |
225 | "phy_type", &len); | |
226 | #endif | |
227 | else | |
228 | phy_type = env_get("usb_phy_type"); | |
229 | ||
230 | if (!phy_type) { | |
231 | #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY | |
232 | /* if none specified assume internal UTMI */ | |
233 | strcpy(usb_phy, "utmi"); | |
234 | phy_type = usb_phy; | |
235 | #else | |
236 | printf("WARNING: USB phy type not defined !!\n"); | |
237 | return -1; | |
238 | #endif | |
239 | } | |
240 | ||
241 | if (!strncmp(phy_type, "utmi", 4)) { | |
242 | #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY) | |
243 | clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, | |
244 | PHY_CLK_SEL_UTMI); | |
245 | clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, | |
246 | UTMI_PHY_EN); | |
247 | udelay(1000); /* delay required for PHY Clk to appear */ | |
248 | #endif | |
249 | out_le32(&(hcor)->or_portsc[0], PORT_PTS_UTMI); | |
250 | clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, | |
251 | USB_EN); | |
252 | } else { | |
253 | clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, | |
254 | PHY_CLK_SEL_ULPI); | |
255 | clrsetbits_be32(&ehci->control, UTMI_PHY_EN | | |
256 | CONTROL_REGISTER_W1C_MASK, USB_EN); | |
257 | udelay(1000); /* delay required for PHY Clk to appear */ | |
258 | if (!usb_phy_clk_valid(ehci)) | |
259 | return -EINVAL; | |
260 | out_le32(&(hcor)->or_portsc[0], PORT_PTS_ULPI); | |
261 | } | |
262 | ||
263 | out_be32(&ehci->prictrl, 0x0000000c); | |
264 | out_be32(&ehci->age_cnt_limit, 0x00000040); | |
265 | out_be32(&ehci->sictrl, 0x00000001); | |
266 | ||
267 | in_le32(&ehci->usbmode); | |
268 | ||
269 | if (has_erratum_a007798()) | |
270 | set_txfifothresh(ehci, TXFIFOTHRESH); | |
271 | ||
272 | if (has_erratum_a004477()) { | |
273 | /* | |
274 | * When reset is issued while any ULPI transaction is ongoing | |
275 | * then it may result to corruption of ULPI Function Control | |
276 | * Register which eventually causes phy clock to enter low | |
277 | * power mode which stops the clock. Thus delay is required | |
278 | * before reset to let ongoing ULPI transaction complete. | |
279 | */ | |
280 | udelay(1); | |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register | |
287 | * to counter DDR latencies in writing data into Tx buffer. | |
288 | * This prevents Tx buffer from getting underrun | |
289 | */ | |
290 | static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh) | |
291 | { | |
292 | u32 cmd; | |
293 | cmd = ehci_readl(&ehci->txfilltuning); | |
294 | cmd &= ~TXFIFO_THRESH_MASK; | |
295 | cmd |= TXFIFO_THRESH(txfifo_thresh); | |
296 | ehci_writel(&ehci->txfilltuning, cmd); | |
297 | } |