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 | |
4bde4a4c DB |
27 | #include <asm/gpio.h> |
28 | ||
e3825b48 | 29 | #include "ohci.h" |
39a269c0 | 30 | |
0ee6d1ee NF |
31 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
32 | #define at91_for_each_port(index) \ | |
33 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
34 | ||
6b0a1cf7 | 35 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
1b207459 SR |
36 | #define hcd_to_ohci_at91_priv(h) \ |
37 | ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) | |
38 | ||
b4f19470 AB |
39 | #define AT91_MAX_USBH_PORTS 3 |
40 | struct at91_usbh_data { | |
41 | int vbus_pin[AT91_MAX_USBH_PORTS]; /* port power-control pin */ | |
42 | int overcurrent_pin[AT91_MAX_USBH_PORTS]; | |
43 | u8 ports; /* number of ports on root hub */ | |
44 | u8 overcurrent_supported; | |
45 | u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS]; | |
46 | u8 overcurrent_status[AT91_MAX_USBH_PORTS]; | |
47 | u8 overcurrent_changed[AT91_MAX_USBH_PORTS]; | |
48 | }; | |
49 | ||
1b207459 SR |
50 | struct ohci_at91_priv { |
51 | struct clk *iclk; | |
52 | struct clk *fclk; | |
1b207459 SR |
53 | struct clk *hclk; |
54 | bool clocked; | |
1cee6b8d | 55 | bool wakeup; /* Saved wake-up state for resume */ |
1b207459 | 56 | }; |
e3825b48 MG |
57 | /* interface and function clocks; sometimes also an AHB clock */ |
58 | ||
59 | #define DRIVER_DESC "OHCI Atmel driver" | |
60 | ||
61 | static const char hcd_name[] = "ohci-atmel"; | |
62 | ||
63 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
1b207459 SR |
64 | |
65 | static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = { | |
66 | .extra_priv_size = sizeof(struct ohci_at91_priv), | |
67 | }; | |
39a269c0 AV |
68 | |
69 | extern int usb_disabled(void); | |
70 | ||
71 | /*-------------------------------------------------------------------------*/ | |
72 | ||
1b207459 | 73 | static void at91_start_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 74 | { |
1cee6b8d SR |
75 | if (ohci_at91->clocked) |
76 | return; | |
963719c8 BB |
77 | |
78 | clk_set_rate(ohci_at91->fclk, 48000000); | |
1b207459 SR |
79 | clk_prepare_enable(ohci_at91->hclk); |
80 | clk_prepare_enable(ohci_at91->iclk); | |
81 | clk_prepare_enable(ohci_at91->fclk); | |
82 | ohci_at91->clocked = true; | |
ed077bb7 AV |
83 | } |
84 | ||
1b207459 | 85 | static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 86 | { |
1cee6b8d SR |
87 | if (!ohci_at91->clocked) |
88 | return; | |
963719c8 | 89 | |
1b207459 SR |
90 | clk_disable_unprepare(ohci_at91->fclk); |
91 | clk_disable_unprepare(ohci_at91->iclk); | |
92 | clk_disable_unprepare(ohci_at91->hclk); | |
1b207459 | 93 | ohci_at91->clocked = false; |
ed077bb7 AV |
94 | } |
95 | ||
39a269c0 AV |
96 | static void at91_start_hc(struct platform_device *pdev) |
97 | { | |
98 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
99 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 100 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 101 | |
0365ee0a | 102 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
103 | |
104 | /* | |
105 | * Start the USB clocks. | |
106 | */ | |
1b207459 | 107 | at91_start_clock(ohci_at91); |
39a269c0 AV |
108 | |
109 | /* | |
110 | * The USB host controller must remain in reset. | |
111 | */ | |
112 | writel(0, ®s->control); | |
113 | } | |
114 | ||
115 | static void at91_stop_hc(struct platform_device *pdev) | |
116 | { | |
117 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
118 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 119 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 120 | |
0365ee0a | 121 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
122 | |
123 | /* | |
124 | * Put the USB host controller into reset. | |
125 | */ | |
126 | writel(0, ®s->control); | |
127 | ||
128 | /* | |
129 | * Stop the USB clocks. | |
130 | */ | |
1b207459 | 131 | at91_stop_clock(ohci_at91); |
39a269c0 AV |
132 | } |
133 | ||
134 | ||
135 | /*-------------------------------------------------------------------------*/ | |
136 | ||
fb4e98ab | 137 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
138 | |
139 | /* configure so an HC device and id are always provided */ | |
140 | /* always called with process context; sleeping is OK */ | |
141 | ||
142 | ||
143 | /** | |
0365ee0a | 144 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
145 | * Context: !in_interrupt() |
146 | * | |
147 | * Allocates basic resources for this USB host controller, and | |
148 | * then invokes the start() method for the HCD associated with it | |
149 | * through the hotplug entry's driver_data. | |
39a269c0 | 150 | */ |
41ac7b3a | 151 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 152 | struct platform_device *pdev) |
39a269c0 | 153 | { |
e3825b48 MG |
154 | struct at91_usbh_data *board; |
155 | struct ohci_hcd *ohci; | |
39a269c0 | 156 | int retval; |
3b3394af | 157 | struct usb_hcd *hcd; |
1b207459 | 158 | struct ohci_at91_priv *ohci_at91; |
fb5f1834 BB |
159 | struct device *dev = &pdev->dev; |
160 | struct resource *res; | |
161 | int irq; | |
162 | ||
fb5f1834 BB |
163 | irq = platform_get_irq(pdev, 0); |
164 | if (irq < 0) { | |
165 | dev_dbg(dev, "hcd probe: missing irq resource\n"); | |
166 | return irq; | |
39a269c0 AV |
167 | } |
168 | ||
5b218a07 | 169 | hcd = usb_create_hcd(driver, dev, "at91"); |
39a269c0 AV |
170 | if (!hcd) |
171 | return -ENOMEM; | |
1b207459 | 172 | ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 173 | |
04dc3150 | 174 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
cca2bbb3 BB |
175 | hcd->regs = devm_ioremap_resource(dev, res); |
176 | if (IS_ERR(hcd->regs)) { | |
177 | retval = PTR_ERR(hcd->regs); | |
178 | goto err; | |
39a269c0 | 179 | } |
04dc3150 VB |
180 | hcd->rsrc_start = res->start; |
181 | hcd->rsrc_len = resource_size(res); | |
39a269c0 | 182 | |
1b207459 SR |
183 | ohci_at91->iclk = devm_clk_get(dev, "ohci_clk"); |
184 | if (IS_ERR(ohci_at91->iclk)) { | |
5b218a07 | 185 | dev_err(dev, "failed to get ohci_clk\n"); |
1b207459 | 186 | retval = PTR_ERR(ohci_at91->iclk); |
cca2bbb3 | 187 | goto err; |
6813463c | 188 | } |
1b207459 SR |
189 | ohci_at91->fclk = devm_clk_get(dev, "uhpck"); |
190 | if (IS_ERR(ohci_at91->fclk)) { | |
5b218a07 | 191 | dev_err(dev, "failed to get uhpck\n"); |
1b207459 | 192 | retval = PTR_ERR(ohci_at91->fclk); |
fc7a3252 | 193 | goto err; |
6813463c | 194 | } |
1b207459 SR |
195 | ohci_at91->hclk = devm_clk_get(dev, "hclk"); |
196 | if (IS_ERR(ohci_at91->hclk)) { | |
5b218a07 | 197 | dev_err(dev, "failed to get hclk\n"); |
1b207459 | 198 | retval = PTR_ERR(ohci_at91->hclk); |
fc7a3252 | 199 | goto err; |
6813463c | 200 | } |
39a269c0 | 201 | |
e3825b48 MG |
202 | board = hcd->self.controller->platform_data; |
203 | ohci = hcd_to_ohci(hcd); | |
204 | ohci->num_ports = board->ports; | |
39a269c0 | 205 | at91_start_hc(pdev); |
39a269c0 | 206 | |
fb5f1834 | 207 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1f53b485 | 208 | if (retval == 0) { |
3c9740a1 | 209 | device_wakeup_enable(hcd->self.controller); |
39a269c0 | 210 | return retval; |
3c9740a1 | 211 | } |
39a269c0 AV |
212 | |
213 | /* Error handling */ | |
214 | at91_stop_hc(pdev); | |
215 | ||
cca2bbb3 | 216 | err: |
39a269c0 AV |
217 | usb_put_hcd(hcd); |
218 | return retval; | |
219 | } | |
220 | ||
221 | ||
39a269c0 AV |
222 | /* may be called with controller, bus, and devices active */ |
223 | ||
224 | /** | |
0365ee0a | 225 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
226 | * @dev: USB Host Controller being removed |
227 | * Context: !in_interrupt() | |
228 | * | |
229 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
230 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 231 | * context, "rmmod" or something similar. |
39a269c0 AV |
232 | * |
233 | */ | |
fb4e98ab | 234 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 235 | struct platform_device *pdev) |
39a269c0 AV |
236 | { |
237 | usb_remove_hcd(hcd); | |
238 | at91_stop_hc(pdev); | |
421b4bf5 | 239 | usb_put_hcd(hcd); |
39a269c0 AV |
240 | } |
241 | ||
242 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
243 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
244 | { | |
0ee6d1ee | 245 | if (!valid_port(port)) |
aa6e52a3 TP |
246 | return; |
247 | ||
8a7a49d1 | 248 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
249 | return; |
250 | ||
8134ff55 | 251 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 252 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
253 | } |
254 | ||
255 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
256 | { | |
0ee6d1ee | 257 | if (!valid_port(port)) |
aa6e52a3 TP |
258 | return -EINVAL; |
259 | ||
8a7a49d1 | 260 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
261 | return -EINVAL; |
262 | ||
8134ff55 | 263 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 264 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
265 | } |
266 | ||
267 | /* | |
268 | * Update the status data from the hub with the over-current indicator change. | |
269 | */ | |
270 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
271 | { | |
e3825b48 | 272 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
42b59eba | 273 | int length = ohci_hub_status_data(hcd, buf); |
aa6e52a3 TP |
274 | int port; |
275 | ||
0ee6d1ee | 276 | at91_for_each_port(port) { |
aa6e52a3 | 277 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 278 | if (!length) |
aa6e52a3 TP |
279 | length = 1; |
280 | buf[0] |= 1 << (port + 1); | |
281 | } | |
282 | } | |
283 | ||
284 | return length; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Look at the control requests to the root hub and see if we need to override. | |
289 | */ | |
290 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
291 | u16 wIndex, char *buf, u16 wLength) | |
292 | { | |
d4f09e28 | 293 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
294 | struct usb_hub_descriptor *desc; |
295 | int ret = -EINVAL; | |
296 | u32 *data = (u32 *)buf; | |
297 | ||
298 | dev_dbg(hcd->self.controller, | |
299 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
300 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
301 | ||
0ee6d1ee NF |
302 | wIndex--; |
303 | ||
aa6e52a3 TP |
304 | switch (typeReq) { |
305 | case SetPortFeature: | |
306 | if (wValue == USB_PORT_FEAT_POWER) { | |
307 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
308 | if (valid_port(wIndex)) { |
309 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
310 | ret = 0; | |
311 | } | |
312 | ||
aa6e52a3 TP |
313 | goto out; |
314 | } | |
315 | break; | |
316 | ||
317 | case ClearPortFeature: | |
318 | switch (wValue) { | |
319 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
320 | dev_dbg(hcd->self.controller, | |
321 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
322 | ||
0ee6d1ee NF |
323 | if (valid_port(wIndex)) { |
324 | pdata->overcurrent_changed[wIndex] = 0; | |
325 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
326 | } |
327 | ||
328 | goto out; | |
329 | ||
330 | case USB_PORT_FEAT_OVER_CURRENT: | |
331 | dev_dbg(hcd->self.controller, | |
332 | "ClearPortFeature: OVER_CURRENT\n"); | |
333 | ||
0ee6d1ee NF |
334 | if (valid_port(wIndex)) |
335 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
336 | |
337 | goto out; | |
338 | ||
339 | case USB_PORT_FEAT_POWER: | |
340 | dev_dbg(hcd->self.controller, | |
341 | "ClearPortFeature: POWER\n"); | |
342 | ||
0ee6d1ee NF |
343 | if (valid_port(wIndex)) { |
344 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
345 | return 0; |
346 | } | |
347 | } | |
348 | break; | |
349 | } | |
350 | ||
42b59eba | 351 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
aa6e52a3 TP |
352 | if (ret) |
353 | goto out; | |
354 | ||
355 | switch (typeReq) { | |
356 | case GetHubDescriptor: | |
357 | ||
358 | /* update the hub's descriptor */ | |
359 | ||
360 | desc = (struct usb_hub_descriptor *)buf; | |
361 | ||
362 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
363 | desc->wHubCharacteristics); | |
364 | ||
365 | /* remove the old configurations for power-switching, and | |
366 | * over-current protection, and insert our new configuration | |
367 | */ | |
368 | ||
369 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
a9c49bcd SS |
370 | desc->wHubCharacteristics |= |
371 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM); | |
aa6e52a3 TP |
372 | |
373 | if (pdata->overcurrent_supported) { | |
374 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
a9c49bcd SS |
375 | desc->wHubCharacteristics |= |
376 | cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM); | |
aa6e52a3 TP |
377 | } |
378 | ||
379 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
380 | desc->wHubCharacteristics); | |
381 | ||
382 | return ret; | |
383 | ||
384 | case GetPortStatus: | |
385 | /* check port status */ | |
386 | ||
387 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
388 | ||
0ee6d1ee NF |
389 | if (valid_port(wIndex)) { |
390 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 391 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 392 | |
0ee6d1ee | 393 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 394 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 395 | |
0ee6d1ee | 396 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 397 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
398 | } |
399 | } | |
400 | ||
401 | out: | |
402 | return ret; | |
403 | } | |
404 | ||
39a269c0 AV |
405 | /*-------------------------------------------------------------------------*/ |
406 | ||
aa6e52a3 TP |
407 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
408 | { | |
409 | struct platform_device *pdev = data; | |
d4f09e28 | 410 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
411 | int val, gpio, port; |
412 | ||
413 | /* From the GPIO notifying the over-current situation, find | |
414 | * out the corresponding port */ | |
0ee6d1ee | 415 | at91_for_each_port(port) { |
01bb6501 JE |
416 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
417 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 418 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 419 | break; |
e4499079 | 420 | } |
aa6e52a3 TP |
421 | } |
422 | ||
0ee6d1ee | 423 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
424 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
425 | return IRQ_HANDLED; | |
426 | } | |
427 | ||
428 | val = gpio_get_value(gpio); | |
429 | ||
430 | /* When notified of an over-current situation, disable power | |
431 | on the corresponding port, and mark this port in | |
432 | over-current. */ | |
0ee6d1ee | 433 | if (!val) { |
aa6e52a3 TP |
434 | ohci_at91_usb_set_power(pdata, port, 0); |
435 | pdata->overcurrent_status[port] = 1; | |
436 | pdata->overcurrent_changed[port] = 1; | |
437 | } | |
438 | ||
439 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
440 | val ? "exited" : "notified"); | |
441 | ||
442 | return IRQ_HANDLED; | |
443 | } | |
444 | ||
2419730f JCPV |
445 | static const struct of_device_id at91_ohci_dt_ids[] = { |
446 | { .compatible = "atmel,at91rm9200-ohci" }, | |
447 | { /* sentinel */ } | |
448 | }; | |
449 | ||
450 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
451 | ||
bd73bfcd AB |
452 | /*-------------------------------------------------------------------------*/ |
453 | ||
454 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) | |
2419730f JCPV |
455 | { |
456 | struct device_node *np = pdev->dev.of_node; | |
2419730f | 457 | struct at91_usbh_data *pdata; |
bd73bfcd AB |
458 | int i; |
459 | int gpio; | |
460 | int ret; | |
461 | enum of_gpio_flags flags; | |
462 | u32 ports; | |
2419730f JCPV |
463 | |
464 | /* Right now device-tree probed devices don't get dma_mask set. | |
465 | * Since shared usb code relies on it, set it here for now. | |
466 | * Once we have dma capability bindings this can go away. | |
467 | */ | |
e1fd7341 | 468 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
469 | if (ret) |
470 | return ret; | |
2419730f JCPV |
471 | |
472 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
473 | if (!pdata) | |
474 | return -ENOMEM; | |
475 | ||
4a0c4c36 AB |
476 | pdev->dev.platform_data = pdata; |
477 | ||
2419730f JCPV |
478 | if (!of_property_read_u32(np, "num-ports", &ports)) |
479 | pdata->ports = ports; | |
480 | ||
bd73bfcd AB |
481 | at91_for_each_port(i) { |
482 | /* | |
483 | * do not configure PIO if not in relation with | |
484 | * real USB port on board | |
485 | */ | |
486 | if (i >= pdata->ports) { | |
487 | pdata->vbus_pin[i] = -EINVAL; | |
4a0c4c36 | 488 | pdata->overcurrent_pin[i] = -EINVAL; |
e4df9227 | 489 | continue; |
bd73bfcd | 490 | } |
2419730f | 491 | |
e4df9227 AB |
492 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, |
493 | &flags); | |
494 | pdata->vbus_pin[i] = gpio; | |
495 | if (!gpio_is_valid(gpio)) | |
bd73bfcd | 496 | continue; |
e4df9227 | 497 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; |
2419730f | 498 | |
bd73bfcd AB |
499 | ret = gpio_request(gpio, "ohci_vbus"); |
500 | if (ret) { | |
501 | dev_err(&pdev->dev, | |
502 | "can't request vbus gpio %d\n", gpio); | |
503 | continue; | |
504 | } | |
505 | ret = gpio_direction_output(gpio, | |
506 | !pdata->vbus_pin_active_low[i]); | |
507 | if (ret) { | |
508 | dev_err(&pdev->dev, | |
509 | "can't put vbus gpio %d as output %d\n", | |
510 | gpio, !pdata->vbus_pin_active_low[i]); | |
511 | gpio_free(gpio); | |
512 | continue; | |
513 | } | |
6fffb77c | 514 | |
bd73bfcd AB |
515 | ohci_at91_usb_set_power(pdata, i, 1); |
516 | } | |
aaf9f5fc | 517 | |
bd73bfcd | 518 | at91_for_each_port(i) { |
4a0c4c36 AB |
519 | if (i >= pdata->ports) |
520 | break; | |
e4df9227 AB |
521 | |
522 | pdata->overcurrent_pin[i] = | |
523 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
524 | ||
bd73bfcd AB |
525 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
526 | continue; | |
527 | gpio = pdata->overcurrent_pin[i]; | |
aaf9f5fc | 528 | |
bd73bfcd AB |
529 | ret = gpio_request(gpio, "ohci_overcurrent"); |
530 | if (ret) { | |
531 | dev_err(&pdev->dev, | |
532 | "can't request overcurrent gpio %d\n", | |
533 | gpio); | |
534 | continue; | |
aa6e52a3 TP |
535 | } |
536 | ||
bd73bfcd AB |
537 | ret = gpio_direction_input(gpio); |
538 | if (ret) { | |
539 | dev_err(&pdev->dev, | |
540 | "can't configure overcurrent gpio %d as input\n", | |
541 | gpio); | |
542 | gpio_free(gpio); | |
543 | continue; | |
544 | } | |
aa6e52a3 | 545 | |
bd73bfcd AB |
546 | ret = request_irq(gpio_to_irq(gpio), |
547 | ohci_hcd_at91_overcurrent_irq, | |
548 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
549 | if (ret) { | |
550 | gpio_free(gpio); | |
551 | dev_err(&pdev->dev, | |
552 | "can't get gpio IRQ for overcurrent\n"); | |
4bde4a4c DB |
553 | } |
554 | } | |
555 | ||
0365ee0a DB |
556 | device_init_wakeup(&pdev->dev, 1); |
557 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
558 | } |
559 | ||
fb4e98ab | 560 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 561 | { |
d4f09e28 | 562 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
563 | int i; |
564 | ||
565 | if (pdata) { | |
0ee6d1ee | 566 | at91_for_each_port(i) { |
8a7a49d1 | 567 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 568 | continue; |
aa6e52a3 | 569 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
570 | gpio_free(pdata->vbus_pin[i]); |
571 | } | |
aa6e52a3 | 572 | |
0ee6d1ee | 573 | at91_for_each_port(i) { |
8a7a49d1 | 574 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
575 | continue; |
576 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
577 | gpio_free(pdata->overcurrent_pin[i]); | |
578 | } | |
4bde4a4c DB |
579 | } |
580 | ||
0365ee0a | 581 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
582 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
583 | return 0; | |
39a269c0 AV |
584 | } |
585 | ||
586 | #ifdef CONFIG_PM | |
39a269c0 | 587 | |
68ba61b8 | 588 | static int |
94ac0e5d | 589 | ohci_hcd_at91_drv_suspend(struct device *dev) |
68ba61b8 | 590 | { |
94ac0e5d | 591 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
0365ee0a | 592 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
1b207459 | 593 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
a9d3840e | 594 | int ret; |
0365ee0a | 595 | |
1cee6b8d SR |
596 | /* |
597 | * Disable wakeup if we are going to sleep with slow clock mode | |
598 | * enabled. | |
599 | */ | |
600 | ohci_at91->wakeup = device_may_wakeup(dev) | |
601 | && !at91_suspend_entering_slow_clock(); | |
602 | ||
603 | if (ohci_at91->wakeup) | |
0365ee0a | 604 | enable_irq_wake(hcd->irq); |
0365ee0a | 605 | |
1cee6b8d | 606 | ret = ohci_suspend(hcd, ohci_at91->wakeup); |
a9d3840e | 607 | if (ret) { |
1cee6b8d SR |
608 | if (ohci_at91->wakeup) |
609 | disable_irq_wake(hcd->irq); | |
a9d3840e MG |
610 | return ret; |
611 | } | |
0365ee0a DB |
612 | /* |
613 | * The integrated transceivers seem unable to notice disconnect, | |
614 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
615 | * correctness, always discard connection state (using reset). | |
616 | * | |
617 | * REVISIT: some boards will be able to turn VBUS off... | |
618 | */ | |
1cee6b8d | 619 | if (!ohci_at91->wakeup) { |
e3825b48 MG |
620 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
621 | ohci->hc_control &= OHCI_CTRL_RWC; | |
622 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
623 | ohci->rh_state = OHCI_RH_HALTED; | |
624 | ||
869aa98c PV |
625 | /* flush the writes */ |
626 | (void) ohci_readl (ohci, &ohci->regs->control); | |
1b207459 | 627 | at91_stop_clock(ohci_at91); |
0365ee0a | 628 | } |
39a269c0 | 629 | |
a9d3840e | 630 | return ret; |
39a269c0 AV |
631 | } |
632 | ||
94ac0e5d | 633 | static int ohci_hcd_at91_drv_resume(struct device *dev) |
39a269c0 | 634 | { |
94ac0e5d | 635 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
1b207459 | 636 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
6dde896e | 637 | |
1cee6b8d | 638 | if (ohci_at91->wakeup) |
6dde896e MP |
639 | disable_irq_wake(hcd->irq); |
640 | ||
1cee6b8d | 641 | at91_start_clock(ohci_at91); |
39a269c0 | 642 | |
cfa49b4b | 643 | ohci_resume(hcd, false); |
39a269c0 AV |
644 | return 0; |
645 | } | |
39a269c0 AV |
646 | #endif |
647 | ||
94ac0e5d SR |
648 | static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend, |
649 | ohci_hcd_at91_drv_resume); | |
650 | ||
39a269c0 AV |
651 | static struct platform_driver ohci_hcd_at91_driver = { |
652 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 653 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 654 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 | 655 | .driver = { |
0365ee0a | 656 | .name = "at91_ohci", |
94ac0e5d | 657 | .pm = &ohci_hcd_at91_pm_ops, |
be12be54 | 658 | .of_match_table = at91_ohci_dt_ids, |
39a269c0 AV |
659 | }, |
660 | }; | |
e3825b48 MG |
661 | |
662 | static int __init ohci_at91_init(void) | |
663 | { | |
664 | if (usb_disabled()) | |
665 | return -ENODEV; | |
666 | ||
667 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
1b207459 | 668 | ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides); |
e3825b48 MG |
669 | |
670 | /* | |
671 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
672 | * workarounds. We override certain hc_driver functions here to | |
673 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
674 | * allow this more easily, since this is an unusual case, and we don't | |
675 | * want to encourage others to override these functions by making it | |
676 | * too easy. | |
677 | */ | |
678 | ||
e3825b48 MG |
679 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
680 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
681 | ||
682 | return platform_driver_register(&ohci_hcd_at91_driver); | |
683 | } | |
684 | module_init(ohci_at91_init); | |
685 | ||
686 | static void __exit ohci_at91_cleanup(void) | |
687 | { | |
688 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
689 | } | |
690 | module_exit(ohci_at91_cleanup); | |
691 | ||
692 | MODULE_DESCRIPTION(DRIVER_DESC); | |
693 | MODULE_LICENSE("GPL"); | |
694 | MODULE_ALIAS("platform:at91_ohci"); |