Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
4bc36fd3 MYK |
2 | /* |
3 | * Copyright (C) 2010 ST-Ericsson AB | |
4 | * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> | |
5 | * | |
6 | * Based on omap2430.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/kernel.h> | |
4bc36fd3 | 25 | #include <linux/clk.h> |
ded017ee | 26 | #include <linux/err.h> |
4bc36fd3 | 27 | #include <linux/io.h> |
313bdb11 | 28 | #include <linux/of.h> |
4bc36fd3 | 29 | #include <linux/platform_device.h> |
af6882be | 30 | #include <linux/usb/musb-ux500.h> |
4bc36fd3 MYK |
31 | |
32 | #include "musb_core.h" | |
33 | ||
1e572aa5 | 34 | static const struct musb_hdrc_config ux500_musb_hdrc_config = { |
a20b1b79 LJ |
35 | .multipoint = true, |
36 | .dyn_fifo = true, | |
37 | .num_eps = 16, | |
38 | .ram_bits = 16, | |
39 | }; | |
40 | ||
4bc36fd3 MYK |
41 | struct ux500_glue { |
42 | struct device *dev; | |
43 | struct platform_device *musb; | |
44 | struct clk *clk; | |
45 | }; | |
46 | #define glue_to_musb(g) platform_get_drvdata(g->musb) | |
47 | ||
996a9d26 FB |
48 | static void ux500_musb_set_vbus(struct musb *musb, int is_on) |
49 | { | |
50 | u8 devctl; | |
51 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); | |
52 | /* HDRC controls CPEN, but beware current surges during device | |
53 | * connect. They can trigger transient overcurrent conditions | |
54 | * that must be ignored. | |
55 | */ | |
56 | ||
57 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); | |
58 | ||
59 | if (is_on) { | |
e47d9254 | 60 | if (musb->xceiv->otg->state == OTG_STATE_A_IDLE) { |
996a9d26 FB |
61 | /* start the session */ |
62 | devctl |= MUSB_DEVCTL_SESSION; | |
63 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
64 | /* | |
65 | * Wait for the musb to set as A device to enable the | |
66 | * VBUS | |
67 | */ | |
68 | while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { | |
69 | ||
70 | if (time_after(jiffies, timeout)) { | |
71 | dev_err(musb->controller, | |
72 | "configured as A device timeout"); | |
73 | break; | |
74 | } | |
75 | } | |
76 | ||
77 | } else { | |
78 | musb->is_active = 1; | |
79 | musb->xceiv->otg->default_a = 1; | |
e47d9254 | 80 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; |
996a9d26 FB |
81 | devctl |= MUSB_DEVCTL_SESSION; |
82 | MUSB_HST_MODE(musb); | |
83 | } | |
84 | } else { | |
85 | musb->is_active = 0; | |
86 | ||
87 | /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and jumping | |
88 | * right to B_IDLE... | |
89 | */ | |
90 | musb->xceiv->otg->default_a = 0; | |
91 | devctl &= ~MUSB_DEVCTL_SESSION; | |
92 | MUSB_DEV_MODE(musb); | |
93 | } | |
94 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
95 | ||
96 | /* | |
97 | * Devctl values will be updated after vbus goes below | |
98 | * session_valid. The time taken depends on the capacitance | |
99 | * on VBUS line. The max discharge time can be upto 1 sec | |
100 | * as per the spec. Typically on our platform, it is 200ms | |
101 | */ | |
102 | if (!is_on) | |
103 | mdelay(200); | |
104 | ||
105 | dev_dbg(musb->controller, "VBUS %s, devctl %02x\n", | |
e47d9254 | 106 | usb_otg_state_string(musb->xceiv->otg->state), |
996a9d26 FB |
107 | musb_readb(musb->mregs, MUSB_DEVCTL)); |
108 | } | |
109 | ||
0135522c FB |
110 | static int musb_otg_notifications(struct notifier_block *nb, |
111 | unsigned long event, void *unused) | |
112 | { | |
113 | struct musb *musb = container_of(nb, struct musb, nb); | |
114 | ||
115 | dev_dbg(musb->controller, "musb_otg_notifications %ld %s\n", | |
e47d9254 | 116 | event, usb_otg_state_string(musb->xceiv->otg->state)); |
0135522c FB |
117 | |
118 | switch (event) { | |
af6882be | 119 | case UX500_MUSB_ID: |
0135522c FB |
120 | dev_dbg(musb->controller, "ID GND\n"); |
121 | ux500_musb_set_vbus(musb, 1); | |
122 | break; | |
af6882be | 123 | case UX500_MUSB_VBUS: |
0135522c | 124 | dev_dbg(musb->controller, "VBUS Connect\n"); |
0135522c | 125 | break; |
af6882be | 126 | case UX500_MUSB_NONE: |
0135522c FB |
127 | dev_dbg(musb->controller, "VBUS Disconnect\n"); |
128 | if (is_host_active(musb)) | |
129 | ux500_musb_set_vbus(musb, 0); | |
130 | else | |
e47d9254 | 131 | musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
0135522c FB |
132 | break; |
133 | default: | |
134 | dev_dbg(musb->controller, "ID float\n"); | |
135 | return NOTIFY_DONE; | |
136 | } | |
137 | return NOTIFY_OK; | |
138 | } | |
139 | ||
baef653a PDS |
140 | static irqreturn_t ux500_musb_interrupt(int irq, void *__hci) |
141 | { | |
142 | unsigned long flags; | |
143 | irqreturn_t retval = IRQ_NONE; | |
144 | struct musb *musb = __hci; | |
145 | ||
146 | spin_lock_irqsave(&musb->lock, flags); | |
147 | ||
148 | musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); | |
149 | musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); | |
150 | musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); | |
151 | ||
152 | if (musb->int_usb || musb->int_tx || musb->int_rx) | |
153 | retval = musb_interrupt(musb); | |
154 | ||
155 | spin_unlock_irqrestore(&musb->lock, flags); | |
156 | ||
157 | return retval; | |
158 | } | |
159 | ||
4bc36fd3 MYK |
160 | static int ux500_musb_init(struct musb *musb) |
161 | { | |
0135522c FB |
162 | int status; |
163 | ||
662dca54 | 164 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 165 | if (IS_ERR_OR_NULL(musb->xceiv)) { |
4bc36fd3 | 166 | pr_err("HS USB OTG: no transceiver configured\n"); |
25736e0c | 167 | return -EPROBE_DEFER; |
4bc36fd3 MYK |
168 | } |
169 | ||
0135522c FB |
170 | musb->nb.notifier_call = musb_otg_notifications; |
171 | status = usb_register_notifier(musb->xceiv, &musb->nb); | |
172 | if (status < 0) { | |
173 | dev_dbg(musb->controller, "notification register failed\n"); | |
174 | return status; | |
175 | } | |
176 | ||
baef653a PDS |
177 | musb->isr = ux500_musb_interrupt; |
178 | ||
4bc36fd3 MYK |
179 | return 0; |
180 | } | |
181 | ||
182 | static int ux500_musb_exit(struct musb *musb) | |
183 | { | |
0135522c FB |
184 | usb_unregister_notifier(musb->xceiv, &musb->nb); |
185 | ||
721002ec | 186 | usb_put_phy(musb->xceiv); |
4bc36fd3 MYK |
187 | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static const struct musb_platform_ops ux500_ops = { | |
f8e9f34f | 192 | .quirks = MUSB_DMA_UX500 | MUSB_INDEXED_EP, |
7f6283ed TL |
193 | #ifdef CONFIG_USB_UX500_DMA |
194 | .dma_init = ux500_dma_controller_create, | |
195 | .dma_exit = ux500_dma_controller_destroy, | |
196 | #endif | |
4bc36fd3 MYK |
197 | .init = ux500_musb_init, |
198 | .exit = ux500_musb_exit, | |
8a77f05a | 199 | .fifo_mode = 5, |
996a9d26 FB |
200 | |
201 | .set_vbus = ux500_musb_set_vbus, | |
4bc36fd3 MYK |
202 | }; |
203 | ||
313bdb11 LJ |
204 | static struct musb_hdrc_platform_data * |
205 | ux500_of_probe(struct platform_device *pdev, struct device_node *np) | |
206 | { | |
207 | struct musb_hdrc_platform_data *pdata; | |
208 | const char *mode; | |
209 | int strlen; | |
210 | ||
211 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
212 | if (!pdata) | |
213 | return NULL; | |
214 | ||
215 | mode = of_get_property(np, "dr_mode", &strlen); | |
216 | if (!mode) { | |
217 | dev_err(&pdev->dev, "No 'dr_mode' property found\n"); | |
218 | return NULL; | |
219 | } | |
220 | ||
221 | if (strlen > 0) { | |
222 | if (!strcmp(mode, "host")) | |
223 | pdata->mode = MUSB_HOST; | |
224 | if (!strcmp(mode, "otg")) | |
225 | pdata->mode = MUSB_OTG; | |
226 | if (!strcmp(mode, "peripheral")) | |
227 | pdata->mode = MUSB_PERIPHERAL; | |
228 | } | |
229 | ||
230 | return pdata; | |
231 | } | |
232 | ||
41ac7b3a | 233 | static int ux500_probe(struct platform_device *pdev) |
4bc36fd3 | 234 | { |
09fc7d22 | 235 | struct resource musb_resources[2]; |
c1a7d67c | 236 | struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); |
313bdb11 | 237 | struct device_node *np = pdev->dev.of_node; |
4bc36fd3 MYK |
238 | struct platform_device *musb; |
239 | struct ux500_glue *glue; | |
240 | struct clk *clk; | |
4bc36fd3 MYK |
241 | int ret = -ENOMEM; |
242 | ||
313bdb11 LJ |
243 | if (!pdata) { |
244 | if (np) { | |
245 | pdata = ux500_of_probe(pdev, np); | |
246 | if (!pdata) | |
247 | goto err0; | |
248 | ||
249 | pdev->dev.platform_data = pdata; | |
250 | } else { | |
251 | dev_err(&pdev->dev, "no pdata or device tree found\n"); | |
252 | goto err0; | |
253 | } | |
254 | } | |
255 | ||
d7dc5bde | 256 | glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); |
24c611b9 | 257 | if (!glue) |
4bc36fd3 | 258 | goto err0; |
4bc36fd3 | 259 | |
2f771164 | 260 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
4bc36fd3 MYK |
261 | if (!musb) { |
262 | dev_err(&pdev->dev, "failed to allocate musb device\n"); | |
d7dc5bde | 263 | goto err0; |
4bc36fd3 MYK |
264 | } |
265 | ||
d7dc5bde | 266 | clk = devm_clk_get(&pdev->dev, NULL); |
4bc36fd3 MYK |
267 | if (IS_ERR(clk)) { |
268 | dev_err(&pdev->dev, "failed to get clock\n"); | |
269 | ret = PTR_ERR(clk); | |
d7dc5bde | 270 | goto err1; |
4bc36fd3 MYK |
271 | } |
272 | ||
99d17cfa | 273 | ret = clk_prepare_enable(clk); |
4bc36fd3 MYK |
274 | if (ret) { |
275 | dev_err(&pdev->dev, "failed to enable clock\n"); | |
d7dc5bde | 276 | goto err1; |
4bc36fd3 MYK |
277 | } |
278 | ||
279 | musb->dev.parent = &pdev->dev; | |
1e6eebb4 | 280 | musb->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
87266064 | 281 | musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask; |
4bc36fd3 MYK |
282 | |
283 | glue->dev = &pdev->dev; | |
284 | glue->musb = musb; | |
285 | glue->clk = clk; | |
286 | ||
287 | pdata->platform_ops = &ux500_ops; | |
a20b1b79 | 288 | pdata->config = &ux500_musb_hdrc_config; |
4bc36fd3 MYK |
289 | |
290 | platform_set_drvdata(pdev, glue); | |
291 | ||
09fc7d22 FB |
292 | memset(musb_resources, 0x00, sizeof(*musb_resources) * |
293 | ARRAY_SIZE(musb_resources)); | |
294 | ||
295 | musb_resources[0].name = pdev->resource[0].name; | |
296 | musb_resources[0].start = pdev->resource[0].start; | |
297 | musb_resources[0].end = pdev->resource[0].end; | |
298 | musb_resources[0].flags = pdev->resource[0].flags; | |
299 | ||
300 | musb_resources[1].name = pdev->resource[1].name; | |
301 | musb_resources[1].start = pdev->resource[1].start; | |
302 | musb_resources[1].end = pdev->resource[1].end; | |
303 | musb_resources[1].flags = pdev->resource[1].flags; | |
304 | ||
305 | ret = platform_device_add_resources(musb, musb_resources, | |
306 | ARRAY_SIZE(musb_resources)); | |
4bc36fd3 MYK |
307 | if (ret) { |
308 | dev_err(&pdev->dev, "failed to add resources\n"); | |
d7dc5bde | 309 | goto err2; |
4bc36fd3 MYK |
310 | } |
311 | ||
312 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); | |
313 | if (ret) { | |
314 | dev_err(&pdev->dev, "failed to add platform_data\n"); | |
d7dc5bde | 315 | goto err2; |
4bc36fd3 MYK |
316 | } |
317 | ||
318 | ret = platform_device_add(musb); | |
319 | if (ret) { | |
320 | dev_err(&pdev->dev, "failed to register musb device\n"); | |
d7dc5bde | 321 | goto err2; |
4bc36fd3 MYK |
322 | } |
323 | ||
324 | return 0; | |
325 | ||
d7dc5bde | 326 | err2: |
99d17cfa | 327 | clk_disable_unprepare(clk); |
4bc36fd3 | 328 | |
4bc36fd3 | 329 | err1: |
d7dc5bde | 330 | platform_device_put(musb); |
4bc36fd3 MYK |
331 | |
332 | err0: | |
333 | return ret; | |
334 | } | |
335 | ||
fb4e98ab | 336 | static int ux500_remove(struct platform_device *pdev) |
4bc36fd3 MYK |
337 | { |
338 | struct ux500_glue *glue = platform_get_drvdata(pdev); | |
339 | ||
4b0de6f3 | 340 | platform_device_unregister(glue->musb); |
99d17cfa | 341 | clk_disable_unprepare(glue->clk); |
4bc36fd3 MYK |
342 | |
343 | return 0; | |
344 | } | |
345 | ||
30d09223 | 346 | #ifdef CONFIG_PM_SLEEP |
4bc36fd3 MYK |
347 | static int ux500_suspend(struct device *dev) |
348 | { | |
349 | struct ux500_glue *glue = dev_get_drvdata(dev); | |
350 | struct musb *musb = glue_to_musb(glue); | |
351 | ||
79c5623f UH |
352 | if (musb) |
353 | usb_phy_set_suspend(musb->xceiv, 1); | |
354 | ||
99d17cfa | 355 | clk_disable_unprepare(glue->clk); |
4bc36fd3 MYK |
356 | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int ux500_resume(struct device *dev) | |
361 | { | |
362 | struct ux500_glue *glue = dev_get_drvdata(dev); | |
363 | struct musb *musb = glue_to_musb(glue); | |
364 | int ret; | |
365 | ||
99d17cfa | 366 | ret = clk_prepare_enable(glue->clk); |
4bc36fd3 MYK |
367 | if (ret) { |
368 | dev_err(dev, "failed to enable clock\n"); | |
369 | return ret; | |
370 | } | |
371 | ||
79c5623f UH |
372 | if (musb) |
373 | usb_phy_set_suspend(musb->xceiv, 0); | |
4bc36fd3 MYK |
374 | |
375 | return 0; | |
376 | } | |
4bc36fd3 MYK |
377 | #endif |
378 | ||
a89adb09 DM |
379 | static SIMPLE_DEV_PM_OPS(ux500_pm_ops, ux500_suspend, ux500_resume); |
380 | ||
313bdb11 LJ |
381 | static const struct of_device_id ux500_match[] = { |
382 | { .compatible = "stericsson,db8500-musb", }, | |
383 | {} | |
384 | }; | |
385 | ||
523d5daf LB |
386 | MODULE_DEVICE_TABLE(of, ux500_match); |
387 | ||
4bc36fd3 | 388 | static struct platform_driver ux500_driver = { |
e9e8c85e | 389 | .probe = ux500_probe, |
7690417d | 390 | .remove = ux500_remove, |
4bc36fd3 MYK |
391 | .driver = { |
392 | .name = "musb-ux500", | |
a89adb09 | 393 | .pm = &ux500_pm_ops, |
313bdb11 | 394 | .of_match_table = ux500_match, |
4bc36fd3 MYK |
395 | }, |
396 | }; | |
397 | ||
398 | MODULE_DESCRIPTION("UX500 MUSB Glue Layer"); | |
399 | MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>"); | |
400 | MODULE_LICENSE("GPL v2"); | |
0e7090a6 | 401 | module_platform_driver(ux500_driver); |