Commit | Line | Data |
---|---|---|
39a269c0 AV |
1 | /* |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * Copyright (C) 2004 SAN People (Pty) Ltd. | |
5 | * Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org> | |
6 | * | |
0365ee0a | 7 | * AT91 Bus Glue |
39a269c0 AV |
8 | * |
9 | * Based on fragments of 2.4 driver by Rick Bronson. | |
10 | * Based on ohci-omap.c | |
11 | * | |
12 | * This file is licenced under the GPL. | |
13 | */ | |
14 | ||
15 | #include <linux/clk.h> | |
e3825b48 | 16 | #include <linux/dma-mapping.h> |
2419730f JCPV |
17 | #include <linux/of_platform.h> |
18 | #include <linux/of_gpio.h> | |
e3825b48 | 19 | #include <linux/platform_device.h> |
bcd2360c | 20 | #include <linux/platform_data/atmel.h> |
e3825b48 MG |
21 | #include <linux/io.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/usb/hcd.h> | |
39a269c0 | 26 | |
e3825b48 | 27 | #include "ohci.h" |
39a269c0 | 28 | |
0ee6d1ee NF |
29 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
30 | #define at91_for_each_port(index) \ | |
31 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
32 | ||
6b0a1cf7 | 33 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
1b207459 SR |
34 | #define hcd_to_ohci_at91_priv(h) \ |
35 | ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) | |
36 | ||
b4f19470 AB |
37 | #define AT91_MAX_USBH_PORTS 3 |
38 | struct at91_usbh_data { | |
39 | int vbus_pin[AT91_MAX_USBH_PORTS]; /* port power-control pin */ | |
40 | int overcurrent_pin[AT91_MAX_USBH_PORTS]; | |
41 | u8 ports; /* number of ports on root hub */ | |
42 | u8 overcurrent_supported; | |
43 | u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS]; | |
44 | u8 overcurrent_status[AT91_MAX_USBH_PORTS]; | |
45 | u8 overcurrent_changed[AT91_MAX_USBH_PORTS]; | |
46 | }; | |
47 | ||
1b207459 SR |
48 | struct ohci_at91_priv { |
49 | struct clk *iclk; | |
50 | struct clk *fclk; | |
1b207459 SR |
51 | struct clk *hclk; |
52 | bool clocked; | |
1cee6b8d | 53 | bool wakeup; /* Saved wake-up state for resume */ |
1b207459 | 54 | }; |
e3825b48 MG |
55 | /* interface and function clocks; sometimes also an AHB clock */ |
56 | ||
57 | #define DRIVER_DESC "OHCI Atmel driver" | |
58 | ||
59 | static const char hcd_name[] = "ohci-atmel"; | |
60 | ||
61 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
1b207459 SR |
62 | |
63 | static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = { | |
64 | .extra_priv_size = sizeof(struct ohci_at91_priv), | |
65 | }; | |
39a269c0 AV |
66 | |
67 | extern int usb_disabled(void); | |
68 | ||
69 | /*-------------------------------------------------------------------------*/ | |
70 | ||
1b207459 | 71 | static void at91_start_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 72 | { |
1cee6b8d SR |
73 | if (ohci_at91->clocked) |
74 | return; | |
963719c8 BB |
75 | |
76 | clk_set_rate(ohci_at91->fclk, 48000000); | |
1b207459 SR |
77 | clk_prepare_enable(ohci_at91->hclk); |
78 | clk_prepare_enable(ohci_at91->iclk); | |
79 | clk_prepare_enable(ohci_at91->fclk); | |
80 | ohci_at91->clocked = true; | |
ed077bb7 AV |
81 | } |
82 | ||
1b207459 | 83 | static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 84 | { |
1cee6b8d SR |
85 | if (!ohci_at91->clocked) |
86 | return; | |
963719c8 | 87 | |
1b207459 SR |
88 | clk_disable_unprepare(ohci_at91->fclk); |
89 | clk_disable_unprepare(ohci_at91->iclk); | |
90 | clk_disable_unprepare(ohci_at91->hclk); | |
1b207459 | 91 | ohci_at91->clocked = false; |
ed077bb7 AV |
92 | } |
93 | ||
39a269c0 AV |
94 | static void at91_start_hc(struct platform_device *pdev) |
95 | { | |
96 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
97 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 98 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 99 | |
0365ee0a | 100 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
101 | |
102 | /* | |
103 | * Start the USB clocks. | |
104 | */ | |
1b207459 | 105 | at91_start_clock(ohci_at91); |
39a269c0 AV |
106 | |
107 | /* | |
108 | * The USB host controller must remain in reset. | |
109 | */ | |
110 | writel(0, ®s->control); | |
111 | } | |
112 | ||
113 | static void at91_stop_hc(struct platform_device *pdev) | |
114 | { | |
115 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
116 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 117 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 118 | |
0365ee0a | 119 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
120 | |
121 | /* | |
122 | * Put the USB host controller into reset. | |
123 | */ | |
124 | writel(0, ®s->control); | |
125 | ||
126 | /* | |
127 | * Stop the USB clocks. | |
128 | */ | |
1b207459 | 129 | at91_stop_clock(ohci_at91); |
39a269c0 AV |
130 | } |
131 | ||
132 | ||
133 | /*-------------------------------------------------------------------------*/ | |
134 | ||
fb4e98ab | 135 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
136 | |
137 | /* configure so an HC device and id are always provided */ | |
138 | /* always called with process context; sleeping is OK */ | |
139 | ||
140 | ||
141 | /** | |
0365ee0a | 142 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
143 | * Context: !in_interrupt() |
144 | * | |
145 | * Allocates basic resources for this USB host controller, and | |
146 | * then invokes the start() method for the HCD associated with it | |
147 | * through the hotplug entry's driver_data. | |
39a269c0 | 148 | */ |
41ac7b3a | 149 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 150 | struct platform_device *pdev) |
39a269c0 | 151 | { |
e3825b48 MG |
152 | struct at91_usbh_data *board; |
153 | struct ohci_hcd *ohci; | |
39a269c0 | 154 | int retval; |
3b3394af | 155 | struct usb_hcd *hcd; |
1b207459 | 156 | struct ohci_at91_priv *ohci_at91; |
fb5f1834 BB |
157 | struct device *dev = &pdev->dev; |
158 | struct resource *res; | |
159 | int irq; | |
160 | ||
fb5f1834 BB |
161 | irq = platform_get_irq(pdev, 0); |
162 | if (irq < 0) { | |
163 | dev_dbg(dev, "hcd probe: missing irq resource\n"); | |
164 | return irq; | |
39a269c0 AV |
165 | } |
166 | ||
5b218a07 | 167 | hcd = usb_create_hcd(driver, dev, "at91"); |
39a269c0 AV |
168 | if (!hcd) |
169 | return -ENOMEM; | |
1b207459 | 170 | ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 171 | |
04dc3150 | 172 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
cca2bbb3 BB |
173 | hcd->regs = devm_ioremap_resource(dev, res); |
174 | if (IS_ERR(hcd->regs)) { | |
175 | retval = PTR_ERR(hcd->regs); | |
176 | goto err; | |
39a269c0 | 177 | } |
04dc3150 VB |
178 | hcd->rsrc_start = res->start; |
179 | hcd->rsrc_len = resource_size(res); | |
39a269c0 | 180 | |
1b207459 SR |
181 | ohci_at91->iclk = devm_clk_get(dev, "ohci_clk"); |
182 | if (IS_ERR(ohci_at91->iclk)) { | |
5b218a07 | 183 | dev_err(dev, "failed to get ohci_clk\n"); |
1b207459 | 184 | retval = PTR_ERR(ohci_at91->iclk); |
cca2bbb3 | 185 | goto err; |
6813463c | 186 | } |
1b207459 SR |
187 | ohci_at91->fclk = devm_clk_get(dev, "uhpck"); |
188 | if (IS_ERR(ohci_at91->fclk)) { | |
5b218a07 | 189 | dev_err(dev, "failed to get uhpck\n"); |
1b207459 | 190 | retval = PTR_ERR(ohci_at91->fclk); |
fc7a3252 | 191 | goto err; |
6813463c | 192 | } |
1b207459 SR |
193 | ohci_at91->hclk = devm_clk_get(dev, "hclk"); |
194 | if (IS_ERR(ohci_at91->hclk)) { | |
5b218a07 | 195 | dev_err(dev, "failed to get hclk\n"); |
1b207459 | 196 | retval = PTR_ERR(ohci_at91->hclk); |
fc7a3252 | 197 | goto err; |
6813463c | 198 | } |
39a269c0 | 199 | |
e3825b48 MG |
200 | board = hcd->self.controller->platform_data; |
201 | ohci = hcd_to_ohci(hcd); | |
202 | ohci->num_ports = board->ports; | |
39a269c0 | 203 | at91_start_hc(pdev); |
39a269c0 | 204 | |
fb5f1834 | 205 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1f53b485 | 206 | if (retval == 0) { |
3c9740a1 | 207 | device_wakeup_enable(hcd->self.controller); |
39a269c0 | 208 | return retval; |
3c9740a1 | 209 | } |
39a269c0 AV |
210 | |
211 | /* Error handling */ | |
212 | at91_stop_hc(pdev); | |
213 | ||
cca2bbb3 | 214 | err: |
39a269c0 AV |
215 | usb_put_hcd(hcd); |
216 | return retval; | |
217 | } | |
218 | ||
219 | ||
39a269c0 AV |
220 | /* may be called with controller, bus, and devices active */ |
221 | ||
222 | /** | |
0365ee0a | 223 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
224 | * @dev: USB Host Controller being removed |
225 | * Context: !in_interrupt() | |
226 | * | |
227 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
228 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 229 | * context, "rmmod" or something similar. |
39a269c0 AV |
230 | * |
231 | */ | |
fb4e98ab | 232 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 233 | struct platform_device *pdev) |
39a269c0 AV |
234 | { |
235 | usb_remove_hcd(hcd); | |
236 | at91_stop_hc(pdev); | |
421b4bf5 | 237 | usb_put_hcd(hcd); |
39a269c0 AV |
238 | } |
239 | ||
240 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
241 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
242 | { | |
0ee6d1ee | 243 | if (!valid_port(port)) |
aa6e52a3 TP |
244 | return; |
245 | ||
8a7a49d1 | 246 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
247 | return; |
248 | ||
8134ff55 | 249 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 250 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
251 | } |
252 | ||
253 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
254 | { | |
0ee6d1ee | 255 | if (!valid_port(port)) |
aa6e52a3 TP |
256 | return -EINVAL; |
257 | ||
8a7a49d1 | 258 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
259 | return -EINVAL; |
260 | ||
8134ff55 | 261 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 262 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
263 | } |
264 | ||
265 | /* | |
266 | * Update the status data from the hub with the over-current indicator change. | |
267 | */ | |
268 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
269 | { | |
e3825b48 | 270 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
42b59eba | 271 | int length = ohci_hub_status_data(hcd, buf); |
aa6e52a3 TP |
272 | int port; |
273 | ||
0ee6d1ee | 274 | at91_for_each_port(port) { |
aa6e52a3 | 275 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 276 | if (!length) |
aa6e52a3 TP |
277 | length = 1; |
278 | buf[0] |= 1 << (port + 1); | |
279 | } | |
280 | } | |
281 | ||
282 | return length; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Look at the control requests to the root hub and see if we need to override. | |
287 | */ | |
288 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
289 | u16 wIndex, char *buf, u16 wLength) | |
290 | { | |
d4f09e28 | 291 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
292 | struct usb_hub_descriptor *desc; |
293 | int ret = -EINVAL; | |
294 | u32 *data = (u32 *)buf; | |
295 | ||
296 | dev_dbg(hcd->self.controller, | |
297 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
298 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
299 | ||
0ee6d1ee NF |
300 | wIndex--; |
301 | ||
aa6e52a3 TP |
302 | switch (typeReq) { |
303 | case SetPortFeature: | |
304 | if (wValue == USB_PORT_FEAT_POWER) { | |
305 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
306 | if (valid_port(wIndex)) { |
307 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
308 | ret = 0; | |
309 | } | |
310 | ||
aa6e52a3 TP |
311 | goto out; |
312 | } | |
313 | break; | |
314 | ||
315 | case ClearPortFeature: | |
316 | switch (wValue) { | |
317 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
318 | dev_dbg(hcd->self.controller, | |
319 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
320 | ||
0ee6d1ee NF |
321 | if (valid_port(wIndex)) { |
322 | pdata->overcurrent_changed[wIndex] = 0; | |
323 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
324 | } |
325 | ||
326 | goto out; | |
327 | ||
328 | case USB_PORT_FEAT_OVER_CURRENT: | |
329 | dev_dbg(hcd->self.controller, | |
330 | "ClearPortFeature: OVER_CURRENT\n"); | |
331 | ||
0ee6d1ee NF |
332 | if (valid_port(wIndex)) |
333 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
334 | |
335 | goto out; | |
336 | ||
337 | case USB_PORT_FEAT_POWER: | |
338 | dev_dbg(hcd->self.controller, | |
339 | "ClearPortFeature: POWER\n"); | |
340 | ||
0ee6d1ee NF |
341 | if (valid_port(wIndex)) { |
342 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
343 | return 0; |
344 | } | |
345 | } | |
346 | break; | |
347 | } | |
348 | ||
42b59eba | 349 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
aa6e52a3 TP |
350 | if (ret) |
351 | goto out; | |
352 | ||
353 | switch (typeReq) { | |
354 | case GetHubDescriptor: | |
355 | ||
356 | /* update the hub's descriptor */ | |
357 | ||
358 | desc = (struct usb_hub_descriptor *)buf; | |
359 | ||
360 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
361 | desc->wHubCharacteristics); | |
362 | ||
363 | /* remove the old configurations for power-switching, and | |
364 | * over-current protection, and insert our new configuration | |
365 | */ | |
366 | ||
367 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
a9c49bcd SS |
368 | desc->wHubCharacteristics |= |
369 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM); | |
aa6e52a3 TP |
370 | |
371 | if (pdata->overcurrent_supported) { | |
372 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
a9c49bcd SS |
373 | desc->wHubCharacteristics |= |
374 | cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM); | |
aa6e52a3 TP |
375 | } |
376 | ||
377 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
378 | desc->wHubCharacteristics); | |
379 | ||
380 | return ret; | |
381 | ||
382 | case GetPortStatus: | |
383 | /* check port status */ | |
384 | ||
385 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
386 | ||
0ee6d1ee NF |
387 | if (valid_port(wIndex)) { |
388 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 389 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 390 | |
0ee6d1ee | 391 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 392 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 393 | |
0ee6d1ee | 394 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 395 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
396 | } |
397 | } | |
398 | ||
399 | out: | |
400 | return ret; | |
401 | } | |
402 | ||
39a269c0 AV |
403 | /*-------------------------------------------------------------------------*/ |
404 | ||
aa6e52a3 TP |
405 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
406 | { | |
407 | struct platform_device *pdev = data; | |
d4f09e28 | 408 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
409 | int val, gpio, port; |
410 | ||
411 | /* From the GPIO notifying the over-current situation, find | |
412 | * out the corresponding port */ | |
0ee6d1ee | 413 | at91_for_each_port(port) { |
01bb6501 JE |
414 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
415 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 416 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 417 | break; |
e4499079 | 418 | } |
aa6e52a3 TP |
419 | } |
420 | ||
0ee6d1ee | 421 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
422 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
423 | return IRQ_HANDLED; | |
424 | } | |
425 | ||
426 | val = gpio_get_value(gpio); | |
427 | ||
428 | /* When notified of an over-current situation, disable power | |
429 | on the corresponding port, and mark this port in | |
430 | over-current. */ | |
0ee6d1ee | 431 | if (!val) { |
aa6e52a3 TP |
432 | ohci_at91_usb_set_power(pdata, port, 0); |
433 | pdata->overcurrent_status[port] = 1; | |
434 | pdata->overcurrent_changed[port] = 1; | |
435 | } | |
436 | ||
437 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
438 | val ? "exited" : "notified"); | |
439 | ||
440 | return IRQ_HANDLED; | |
441 | } | |
442 | ||
2419730f JCPV |
443 | static const struct of_device_id at91_ohci_dt_ids[] = { |
444 | { .compatible = "atmel,at91rm9200-ohci" }, | |
445 | { /* sentinel */ } | |
446 | }; | |
447 | ||
448 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
449 | ||
bd73bfcd AB |
450 | /*-------------------------------------------------------------------------*/ |
451 | ||
452 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) | |
2419730f JCPV |
453 | { |
454 | struct device_node *np = pdev->dev.of_node; | |
2419730f | 455 | struct at91_usbh_data *pdata; |
bd73bfcd AB |
456 | int i; |
457 | int gpio; | |
458 | int ret; | |
459 | enum of_gpio_flags flags; | |
460 | u32 ports; | |
2419730f JCPV |
461 | |
462 | /* Right now device-tree probed devices don't get dma_mask set. | |
463 | * Since shared usb code relies on it, set it here for now. | |
464 | * Once we have dma capability bindings this can go away. | |
465 | */ | |
e1fd7341 | 466 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
467 | if (ret) |
468 | return ret; | |
2419730f JCPV |
469 | |
470 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
471 | if (!pdata) | |
472 | return -ENOMEM; | |
473 | ||
4a0c4c36 AB |
474 | pdev->dev.platform_data = pdata; |
475 | ||
2419730f JCPV |
476 | if (!of_property_read_u32(np, "num-ports", &ports)) |
477 | pdata->ports = ports; | |
478 | ||
bd73bfcd AB |
479 | at91_for_each_port(i) { |
480 | /* | |
481 | * do not configure PIO if not in relation with | |
482 | * real USB port on board | |
483 | */ | |
484 | if (i >= pdata->ports) { | |
485 | pdata->vbus_pin[i] = -EINVAL; | |
4a0c4c36 | 486 | pdata->overcurrent_pin[i] = -EINVAL; |
e4df9227 | 487 | continue; |
bd73bfcd | 488 | } |
2419730f | 489 | |
e4df9227 AB |
490 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, |
491 | &flags); | |
492 | pdata->vbus_pin[i] = gpio; | |
493 | if (!gpio_is_valid(gpio)) | |
bd73bfcd | 494 | continue; |
e4df9227 | 495 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; |
2419730f | 496 | |
bd73bfcd AB |
497 | ret = gpio_request(gpio, "ohci_vbus"); |
498 | if (ret) { | |
499 | dev_err(&pdev->dev, | |
500 | "can't request vbus gpio %d\n", gpio); | |
501 | continue; | |
502 | } | |
503 | ret = gpio_direction_output(gpio, | |
504 | !pdata->vbus_pin_active_low[i]); | |
505 | if (ret) { | |
506 | dev_err(&pdev->dev, | |
507 | "can't put vbus gpio %d as output %d\n", | |
508 | gpio, !pdata->vbus_pin_active_low[i]); | |
509 | gpio_free(gpio); | |
510 | continue; | |
511 | } | |
6fffb77c | 512 | |
bd73bfcd AB |
513 | ohci_at91_usb_set_power(pdata, i, 1); |
514 | } | |
aaf9f5fc | 515 | |
bd73bfcd | 516 | at91_for_each_port(i) { |
4a0c4c36 AB |
517 | if (i >= pdata->ports) |
518 | break; | |
e4df9227 AB |
519 | |
520 | pdata->overcurrent_pin[i] = | |
521 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
522 | ||
bd73bfcd AB |
523 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
524 | continue; | |
525 | gpio = pdata->overcurrent_pin[i]; | |
aaf9f5fc | 526 | |
bd73bfcd AB |
527 | ret = gpio_request(gpio, "ohci_overcurrent"); |
528 | if (ret) { | |
529 | dev_err(&pdev->dev, | |
530 | "can't request overcurrent gpio %d\n", | |
531 | gpio); | |
532 | continue; | |
aa6e52a3 TP |
533 | } |
534 | ||
bd73bfcd AB |
535 | ret = gpio_direction_input(gpio); |
536 | if (ret) { | |
537 | dev_err(&pdev->dev, | |
538 | "can't configure overcurrent gpio %d as input\n", | |
539 | gpio); | |
540 | gpio_free(gpio); | |
541 | continue; | |
542 | } | |
aa6e52a3 | 543 | |
bd73bfcd AB |
544 | ret = request_irq(gpio_to_irq(gpio), |
545 | ohci_hcd_at91_overcurrent_irq, | |
546 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
547 | if (ret) { | |
548 | gpio_free(gpio); | |
549 | dev_err(&pdev->dev, | |
550 | "can't get gpio IRQ for overcurrent\n"); | |
4bde4a4c DB |
551 | } |
552 | } | |
553 | ||
0365ee0a DB |
554 | device_init_wakeup(&pdev->dev, 1); |
555 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
556 | } |
557 | ||
fb4e98ab | 558 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 559 | { |
d4f09e28 | 560 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
561 | int i; |
562 | ||
563 | if (pdata) { | |
0ee6d1ee | 564 | at91_for_each_port(i) { |
8a7a49d1 | 565 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 566 | continue; |
aa6e52a3 | 567 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
568 | gpio_free(pdata->vbus_pin[i]); |
569 | } | |
aa6e52a3 | 570 | |
0ee6d1ee | 571 | at91_for_each_port(i) { |
8a7a49d1 | 572 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
573 | continue; |
574 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
575 | gpio_free(pdata->overcurrent_pin[i]); | |
576 | } | |
4bde4a4c DB |
577 | } |
578 | ||
0365ee0a | 579 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
580 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
581 | return 0; | |
39a269c0 AV |
582 | } |
583 | ||
d2905193 | 584 | static int __maybe_unused |
94ac0e5d | 585 | ohci_hcd_at91_drv_suspend(struct device *dev) |
68ba61b8 | 586 | { |
94ac0e5d | 587 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
0365ee0a | 588 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
1b207459 | 589 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
a9d3840e | 590 | int ret; |
0365ee0a | 591 | |
1cee6b8d SR |
592 | /* |
593 | * Disable wakeup if we are going to sleep with slow clock mode | |
594 | * enabled. | |
595 | */ | |
596 | ohci_at91->wakeup = device_may_wakeup(dev) | |
597 | && !at91_suspend_entering_slow_clock(); | |
598 | ||
599 | if (ohci_at91->wakeup) | |
0365ee0a | 600 | enable_irq_wake(hcd->irq); |
0365ee0a | 601 | |
1cee6b8d | 602 | ret = ohci_suspend(hcd, ohci_at91->wakeup); |
a9d3840e | 603 | if (ret) { |
1cee6b8d SR |
604 | if (ohci_at91->wakeup) |
605 | disable_irq_wake(hcd->irq); | |
a9d3840e MG |
606 | return ret; |
607 | } | |
0365ee0a DB |
608 | /* |
609 | * The integrated transceivers seem unable to notice disconnect, | |
610 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
611 | * correctness, always discard connection state (using reset). | |
612 | * | |
613 | * REVISIT: some boards will be able to turn VBUS off... | |
614 | */ | |
1cee6b8d | 615 | if (!ohci_at91->wakeup) { |
e3825b48 MG |
616 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
617 | ohci->hc_control &= OHCI_CTRL_RWC; | |
618 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
619 | ohci->rh_state = OHCI_RH_HALTED; | |
620 | ||
869aa98c PV |
621 | /* flush the writes */ |
622 | (void) ohci_readl (ohci, &ohci->regs->control); | |
1b207459 | 623 | at91_stop_clock(ohci_at91); |
0365ee0a | 624 | } |
39a269c0 | 625 | |
a9d3840e | 626 | return ret; |
39a269c0 AV |
627 | } |
628 | ||
d2905193 AB |
629 | static int __maybe_unused |
630 | ohci_hcd_at91_drv_resume(struct device *dev) | |
39a269c0 | 631 | { |
94ac0e5d | 632 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
1b207459 | 633 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
6dde896e | 634 | |
1cee6b8d | 635 | if (ohci_at91->wakeup) |
6dde896e MP |
636 | disable_irq_wake(hcd->irq); |
637 | ||
1cee6b8d | 638 | at91_start_clock(ohci_at91); |
39a269c0 | 639 | |
cfa49b4b | 640 | ohci_resume(hcd, false); |
39a269c0 AV |
641 | return 0; |
642 | } | |
39a269c0 | 643 | |
94ac0e5d SR |
644 | static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend, |
645 | ohci_hcd_at91_drv_resume); | |
646 | ||
39a269c0 AV |
647 | static struct platform_driver ohci_hcd_at91_driver = { |
648 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 649 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 650 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 | 651 | .driver = { |
0365ee0a | 652 | .name = "at91_ohci", |
94ac0e5d | 653 | .pm = &ohci_hcd_at91_pm_ops, |
be12be54 | 654 | .of_match_table = at91_ohci_dt_ids, |
39a269c0 AV |
655 | }, |
656 | }; | |
e3825b48 MG |
657 | |
658 | static int __init ohci_at91_init(void) | |
659 | { | |
660 | if (usb_disabled()) | |
661 | return -ENODEV; | |
662 | ||
663 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
1b207459 | 664 | ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides); |
e3825b48 MG |
665 | |
666 | /* | |
667 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
668 | * workarounds. We override certain hc_driver functions here to | |
669 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
670 | * allow this more easily, since this is an unusual case, and we don't | |
671 | * want to encourage others to override these functions by making it | |
672 | * too easy. | |
673 | */ | |
674 | ||
e3825b48 MG |
675 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
676 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
677 | ||
678 | return platform_driver_register(&ohci_hcd_at91_driver); | |
679 | } | |
680 | module_init(ohci_at91_init); | |
681 | ||
682 | static void __exit ohci_at91_cleanup(void) | |
683 | { | |
684 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
685 | } | |
686 | module_exit(ohci_at91_cleanup); | |
687 | ||
688 | MODULE_DESCRIPTION(DRIVER_DESC); | |
689 | MODULE_LICENSE("GPL"); | |
690 | MODULE_ALIAS("platform:at91_ohci"); |