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 | |
a09e64fb | 27 | #include <mach/hardware.h> |
4bde4a4c DB |
28 | #include <asm/gpio.h> |
29 | ||
a09e64fb | 30 | #include <mach/cpu.h> |
39a269c0 | 31 | |
e3825b48 MG |
32 | |
33 | #include "ohci.h" | |
39a269c0 | 34 | |
0ee6d1ee NF |
35 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
36 | #define at91_for_each_port(index) \ | |
37 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
38 | ||
6b0a1cf7 BB |
39 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
40 | static struct clk *iclk, *fclk, *uclk, *hclk; | |
e3825b48 MG |
41 | /* interface and function clocks; sometimes also an AHB clock */ |
42 | ||
43 | #define DRIVER_DESC "OHCI Atmel driver" | |
44 | ||
45 | static const char hcd_name[] = "ohci-atmel"; | |
46 | ||
47 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
0365ee0a | 48 | static int clocked; |
e3825b48 MG |
49 | static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, |
50 | u16 wValue, u16 wIndex, char *buf, u16 wLength); | |
51 | static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); | |
39a269c0 AV |
52 | |
53 | extern int usb_disabled(void); | |
54 | ||
55 | /*-------------------------------------------------------------------------*/ | |
56 | ||
ed077bb7 AV |
57 | static void at91_start_clock(void) |
58 | { | |
6b0a1cf7 BB |
59 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
60 | clk_set_rate(uclk, 48000000); | |
61 | clk_prepare_enable(uclk); | |
62 | } | |
8e82d8d9 BB |
63 | clk_prepare_enable(hclk); |
64 | clk_prepare_enable(iclk); | |
65 | clk_prepare_enable(fclk); | |
ed077bb7 AV |
66 | clocked = 1; |
67 | } | |
68 | ||
69 | static void at91_stop_clock(void) | |
70 | { | |
8e82d8d9 BB |
71 | clk_disable_unprepare(fclk); |
72 | clk_disable_unprepare(iclk); | |
73 | clk_disable_unprepare(hclk); | |
6b0a1cf7 BB |
74 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
75 | clk_disable_unprepare(uclk); | |
ed077bb7 AV |
76 | clocked = 0; |
77 | } | |
78 | ||
39a269c0 AV |
79 | static void at91_start_hc(struct platform_device *pdev) |
80 | { | |
81 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
82 | struct ohci_regs __iomem *regs = hcd->regs; | |
83 | ||
0365ee0a | 84 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
85 | |
86 | /* | |
87 | * Start the USB clocks. | |
88 | */ | |
ed077bb7 | 89 | at91_start_clock(); |
39a269c0 AV |
90 | |
91 | /* | |
92 | * The USB host controller must remain in reset. | |
93 | */ | |
94 | writel(0, ®s->control); | |
95 | } | |
96 | ||
97 | static void at91_stop_hc(struct platform_device *pdev) | |
98 | { | |
99 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
100 | struct ohci_regs __iomem *regs = hcd->regs; | |
101 | ||
0365ee0a | 102 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
103 | |
104 | /* | |
105 | * Put the USB host controller into reset. | |
106 | */ | |
107 | writel(0, ®s->control); | |
108 | ||
109 | /* | |
110 | * Stop the USB clocks. | |
111 | */ | |
ed077bb7 | 112 | at91_stop_clock(); |
39a269c0 AV |
113 | } |
114 | ||
115 | ||
116 | /*-------------------------------------------------------------------------*/ | |
117 | ||
fb4e98ab | 118 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
119 | |
120 | /* configure so an HC device and id are always provided */ | |
121 | /* always called with process context; sleeping is OK */ | |
122 | ||
123 | ||
124 | /** | |
0365ee0a | 125 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
126 | * Context: !in_interrupt() |
127 | * | |
128 | * Allocates basic resources for this USB host controller, and | |
129 | * then invokes the start() method for the HCD associated with it | |
130 | * through the hotplug entry's driver_data. | |
39a269c0 | 131 | */ |
41ac7b3a | 132 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 133 | struct platform_device *pdev) |
39a269c0 | 134 | { |
e3825b48 MG |
135 | struct at91_usbh_data *board; |
136 | struct ohci_hcd *ohci; | |
39a269c0 AV |
137 | int retval; |
138 | struct usb_hcd *hcd = NULL; | |
fb5f1834 BB |
139 | struct device *dev = &pdev->dev; |
140 | struct resource *res; | |
141 | int irq; | |
142 | ||
143 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
144 | if (!res) { | |
145 | dev_dbg(dev, "hcd probe: missing memory resource\n"); | |
146 | return -ENXIO; | |
39a269c0 AV |
147 | } |
148 | ||
fb5f1834 BB |
149 | irq = platform_get_irq(pdev, 0); |
150 | if (irq < 0) { | |
151 | dev_dbg(dev, "hcd probe: missing irq resource\n"); | |
152 | return irq; | |
39a269c0 AV |
153 | } |
154 | ||
0365ee0a | 155 | hcd = usb_create_hcd(driver, &pdev->dev, "at91"); |
39a269c0 AV |
156 | if (!hcd) |
157 | return -ENOMEM; | |
fb5f1834 BB |
158 | hcd->rsrc_start = res->start; |
159 | hcd->rsrc_len = resource_size(res); | |
39a269c0 AV |
160 | |
161 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
162 | pr_debug("request_mem_region failed\n"); | |
163 | retval = -EBUSY; | |
164 | goto err1; | |
165 | } | |
166 | ||
167 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
168 | if (!hcd->regs) { | |
169 | pr_debug("ioremap failed\n"); | |
170 | retval = -EIO; | |
171 | goto err2; | |
172 | } | |
173 | ||
174 | iclk = clk_get(&pdev->dev, "ohci_clk"); | |
6813463c JCPV |
175 | if (IS_ERR(iclk)) { |
176 | dev_err(&pdev->dev, "failed to get ohci_clk\n"); | |
177 | retval = PTR_ERR(iclk); | |
178 | goto err3; | |
179 | } | |
39a269c0 | 180 | fclk = clk_get(&pdev->dev, "uhpck"); |
6813463c JCPV |
181 | if (IS_ERR(fclk)) { |
182 | dev_err(&pdev->dev, "failed to get uhpck\n"); | |
183 | retval = PTR_ERR(fclk); | |
184 | goto err4; | |
185 | } | |
0af4316b | 186 | hclk = clk_get(&pdev->dev, "hclk"); |
6813463c JCPV |
187 | if (IS_ERR(hclk)) { |
188 | dev_err(&pdev->dev, "failed to get hclk\n"); | |
189 | retval = PTR_ERR(hclk); | |
190 | goto err5; | |
191 | } | |
6b0a1cf7 BB |
192 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
193 | uclk = clk_get(&pdev->dev, "usb_clk"); | |
194 | if (IS_ERR(uclk)) { | |
195 | dev_err(&pdev->dev, "failed to get uclk\n"); | |
196 | retval = PTR_ERR(uclk); | |
197 | goto err6; | |
198 | } | |
199 | } | |
39a269c0 | 200 | |
e3825b48 MG |
201 | board = hcd->self.controller->platform_data; |
202 | ohci = hcd_to_ohci(hcd); | |
203 | ohci->num_ports = board->ports; | |
39a269c0 | 204 | at91_start_hc(pdev); |
39a269c0 | 205 | |
fb5f1834 | 206 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
39a269c0 AV |
207 | if (retval == 0) |
208 | return retval; | |
209 | ||
210 | /* Error handling */ | |
211 | at91_stop_hc(pdev); | |
212 | ||
6b0a1cf7 BB |
213 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
214 | clk_put(uclk); | |
215 | err6: | |
0af4316b | 216 | clk_put(hclk); |
6813463c | 217 | err5: |
39a269c0 | 218 | clk_put(fclk); |
6813463c | 219 | err4: |
39a269c0 AV |
220 | clk_put(iclk); |
221 | ||
6813463c | 222 | err3: |
39a269c0 AV |
223 | iounmap(hcd->regs); |
224 | ||
225 | err2: | |
226 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
227 | ||
228 | err1: | |
229 | usb_put_hcd(hcd); | |
230 | return retval; | |
231 | } | |
232 | ||
233 | ||
39a269c0 AV |
234 | /* may be called with controller, bus, and devices active */ |
235 | ||
236 | /** | |
0365ee0a | 237 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
238 | * @dev: USB Host Controller being removed |
239 | * Context: !in_interrupt() | |
240 | * | |
241 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
242 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 243 | * context, "rmmod" or something similar. |
39a269c0 AV |
244 | * |
245 | */ | |
fb4e98ab | 246 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 247 | struct platform_device *pdev) |
39a269c0 AV |
248 | { |
249 | usb_remove_hcd(hcd); | |
250 | at91_stop_hc(pdev); | |
251 | iounmap(hcd->regs); | |
68ba61b8 | 252 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
421b4bf5 | 253 | usb_put_hcd(hcd); |
39a269c0 | 254 | |
6b0a1cf7 BB |
255 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
256 | clk_put(uclk); | |
0af4316b | 257 | clk_put(hclk); |
68ba61b8 DB |
258 | clk_put(fclk); |
259 | clk_put(iclk); | |
ed077bb7 | 260 | fclk = iclk = hclk = NULL; |
39a269c0 AV |
261 | } |
262 | ||
263 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
264 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
265 | { | |
0ee6d1ee | 266 | if (!valid_port(port)) |
aa6e52a3 TP |
267 | return; |
268 | ||
8a7a49d1 | 269 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
270 | return; |
271 | ||
8134ff55 | 272 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 273 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
274 | } |
275 | ||
276 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
277 | { | |
0ee6d1ee | 278 | if (!valid_port(port)) |
aa6e52a3 TP |
279 | return -EINVAL; |
280 | ||
8a7a49d1 | 281 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
282 | return -EINVAL; |
283 | ||
8134ff55 | 284 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 285 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
286 | } |
287 | ||
288 | /* | |
289 | * Update the status data from the hub with the over-current indicator change. | |
290 | */ | |
291 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
292 | { | |
e3825b48 MG |
293 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
294 | int length = orig_ohci_hub_status_data(hcd, buf); | |
aa6e52a3 TP |
295 | int port; |
296 | ||
0ee6d1ee | 297 | at91_for_each_port(port) { |
aa6e52a3 | 298 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 299 | if (!length) |
aa6e52a3 TP |
300 | length = 1; |
301 | buf[0] |= 1 << (port + 1); | |
302 | } | |
303 | } | |
304 | ||
305 | return length; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Look at the control requests to the root hub and see if we need to override. | |
310 | */ | |
311 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
312 | u16 wIndex, char *buf, u16 wLength) | |
313 | { | |
d4f09e28 | 314 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
315 | struct usb_hub_descriptor *desc; |
316 | int ret = -EINVAL; | |
317 | u32 *data = (u32 *)buf; | |
318 | ||
319 | dev_dbg(hcd->self.controller, | |
320 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
321 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
322 | ||
0ee6d1ee NF |
323 | wIndex--; |
324 | ||
aa6e52a3 TP |
325 | switch (typeReq) { |
326 | case SetPortFeature: | |
327 | if (wValue == USB_PORT_FEAT_POWER) { | |
328 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
329 | if (valid_port(wIndex)) { |
330 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
331 | ret = 0; | |
332 | } | |
333 | ||
aa6e52a3 TP |
334 | goto out; |
335 | } | |
336 | break; | |
337 | ||
338 | case ClearPortFeature: | |
339 | switch (wValue) { | |
340 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
341 | dev_dbg(hcd->self.controller, | |
342 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
343 | ||
0ee6d1ee NF |
344 | if (valid_port(wIndex)) { |
345 | pdata->overcurrent_changed[wIndex] = 0; | |
346 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
347 | } |
348 | ||
349 | goto out; | |
350 | ||
351 | case USB_PORT_FEAT_OVER_CURRENT: | |
352 | dev_dbg(hcd->self.controller, | |
353 | "ClearPortFeature: OVER_CURRENT\n"); | |
354 | ||
0ee6d1ee NF |
355 | if (valid_port(wIndex)) |
356 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
357 | |
358 | goto out; | |
359 | ||
360 | case USB_PORT_FEAT_POWER: | |
361 | dev_dbg(hcd->self.controller, | |
362 | "ClearPortFeature: POWER\n"); | |
363 | ||
0ee6d1ee NF |
364 | if (valid_port(wIndex)) { |
365 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
366 | return 0; |
367 | } | |
368 | } | |
369 | break; | |
370 | } | |
371 | ||
e3825b48 MG |
372 | ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, |
373 | buf, wLength); | |
aa6e52a3 TP |
374 | if (ret) |
375 | goto out; | |
376 | ||
377 | switch (typeReq) { | |
378 | case GetHubDescriptor: | |
379 | ||
380 | /* update the hub's descriptor */ | |
381 | ||
382 | desc = (struct usb_hub_descriptor *)buf; | |
383 | ||
384 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
385 | desc->wHubCharacteristics); | |
386 | ||
387 | /* remove the old configurations for power-switching, and | |
388 | * over-current protection, and insert our new configuration | |
389 | */ | |
390 | ||
391 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
392 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
393 | ||
394 | if (pdata->overcurrent_supported) { | |
395 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
396 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
397 | } | |
398 | ||
399 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
400 | desc->wHubCharacteristics); | |
401 | ||
402 | return ret; | |
403 | ||
404 | case GetPortStatus: | |
405 | /* check port status */ | |
406 | ||
407 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
408 | ||
0ee6d1ee NF |
409 | if (valid_port(wIndex)) { |
410 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 411 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 412 | |
0ee6d1ee | 413 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 414 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 415 | |
0ee6d1ee | 416 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 417 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
418 | } |
419 | } | |
420 | ||
421 | out: | |
422 | return ret; | |
423 | } | |
424 | ||
39a269c0 AV |
425 | /*-------------------------------------------------------------------------*/ |
426 | ||
aa6e52a3 TP |
427 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
428 | { | |
429 | struct platform_device *pdev = data; | |
d4f09e28 | 430 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
431 | int val, gpio, port; |
432 | ||
433 | /* From the GPIO notifying the over-current situation, find | |
434 | * out the corresponding port */ | |
0ee6d1ee | 435 | at91_for_each_port(port) { |
01bb6501 JE |
436 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
437 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 438 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 439 | break; |
e4499079 | 440 | } |
aa6e52a3 TP |
441 | } |
442 | ||
0ee6d1ee | 443 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
444 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
445 | return IRQ_HANDLED; | |
446 | } | |
447 | ||
448 | val = gpio_get_value(gpio); | |
449 | ||
450 | /* When notified of an over-current situation, disable power | |
451 | on the corresponding port, and mark this port in | |
452 | over-current. */ | |
0ee6d1ee | 453 | if (!val) { |
aa6e52a3 TP |
454 | ohci_at91_usb_set_power(pdata, port, 0); |
455 | pdata->overcurrent_status[port] = 1; | |
456 | pdata->overcurrent_changed[port] = 1; | |
457 | } | |
458 | ||
459 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
460 | val ? "exited" : "notified"); | |
461 | ||
462 | return IRQ_HANDLED; | |
463 | } | |
464 | ||
2419730f JCPV |
465 | #ifdef CONFIG_OF |
466 | static const struct of_device_id at91_ohci_dt_ids[] = { | |
467 | { .compatible = "atmel,at91rm9200-ohci" }, | |
468 | { /* sentinel */ } | |
469 | }; | |
470 | ||
471 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
472 | ||
41ac7b3a | 473 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
474 | { |
475 | struct device_node *np = pdev->dev.of_node; | |
22d9d8e8 | 476 | int i, gpio, ret; |
2419730f JCPV |
477 | enum of_gpio_flags flags; |
478 | struct at91_usbh_data *pdata; | |
479 | u32 ports; | |
480 | ||
481 | if (!np) | |
482 | return 0; | |
483 | ||
484 | /* Right now device-tree probed devices don't get dma_mask set. | |
485 | * Since shared usb code relies on it, set it here for now. | |
486 | * Once we have dma capability bindings this can go away. | |
487 | */ | |
e1fd7341 | 488 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
489 | if (ret) |
490 | return ret; | |
2419730f JCPV |
491 | |
492 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
493 | if (!pdata) | |
494 | return -ENOMEM; | |
495 | ||
496 | if (!of_property_read_u32(np, "num-ports", &ports)) | |
497 | pdata->ports = ports; | |
498 | ||
0ee6d1ee | 499 | at91_for_each_port(i) { |
2419730f JCPV |
500 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
501 | pdata->vbus_pin[i] = gpio; | |
502 | if (!gpio_is_valid(gpio)) | |
503 | continue; | |
504 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; | |
2419730f JCPV |
505 | } |
506 | ||
0ee6d1ee | 507 | at91_for_each_port(i) |
aaf9f5fc NF |
508 | pdata->overcurrent_pin[i] = |
509 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
2419730f JCPV |
510 | |
511 | pdev->dev.platform_data = pdata; | |
512 | ||
513 | return 0; | |
514 | } | |
515 | #else | |
41ac7b3a | 516 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
517 | { |
518 | return 0; | |
519 | } | |
520 | #endif | |
521 | ||
aa6e52a3 TP |
522 | /*-------------------------------------------------------------------------*/ |
523 | ||
41ac7b3a | 524 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
39a269c0 | 525 | { |
2419730f | 526 | struct at91_usbh_data *pdata; |
4bde4a4c | 527 | int i; |
aaf9f5fc NF |
528 | int gpio; |
529 | int ret; | |
4bde4a4c | 530 | |
1887ab2b NF |
531 | ret = ohci_at91_of_init(pdev); |
532 | if (ret) | |
533 | return ret; | |
2419730f | 534 | |
d4f09e28 | 535 | pdata = dev_get_platdata(&pdev->dev); |
2419730f | 536 | |
4bde4a4c | 537 | if (pdata) { |
0ee6d1ee | 538 | at91_for_each_port(i) { |
6fffb77c NF |
539 | /* |
540 | * do not configure PIO if not in relation with | |
541 | * real USB port on board | |
542 | */ | |
543 | if (i >= pdata->ports) { | |
544 | pdata->vbus_pin[i] = -EINVAL; | |
545 | pdata->overcurrent_pin[i] = -EINVAL; | |
546 | break; | |
547 | } | |
548 | ||
8a7a49d1 | 549 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 550 | continue; |
aaf9f5fc NF |
551 | gpio = pdata->vbus_pin[i]; |
552 | ||
553 | ret = gpio_request(gpio, "ohci_vbus"); | |
554 | if (ret) { | |
555 | dev_err(&pdev->dev, | |
556 | "can't request vbus gpio %d\n", gpio); | |
557 | continue; | |
558 | } | |
559 | ret = gpio_direction_output(gpio, | |
560 | !pdata->vbus_pin_active_low[i]); | |
561 | if (ret) { | |
562 | dev_err(&pdev->dev, | |
563 | "can't put vbus gpio %d as output %d\n", | |
564 | gpio, !pdata->vbus_pin_active_low[i]); | |
565 | gpio_free(gpio); | |
566 | continue; | |
567 | } | |
568 | ||
aa6e52a3 TP |
569 | ohci_at91_usb_set_power(pdata, i, 1); |
570 | } | |
571 | ||
0ee6d1ee | 572 | at91_for_each_port(i) { |
8a7a49d1 | 573 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 | 574 | continue; |
aaf9f5fc NF |
575 | gpio = pdata->overcurrent_pin[i]; |
576 | ||
577 | ret = gpio_request(gpio, "ohci_overcurrent"); | |
578 | if (ret) { | |
579 | dev_err(&pdev->dev, | |
580 | "can't request overcurrent gpio %d\n", | |
581 | gpio); | |
582 | continue; | |
583 | } | |
584 | ||
585 | ret = gpio_direction_input(gpio); | |
586 | if (ret) { | |
587 | dev_err(&pdev->dev, | |
588 | "can't configure overcurrent gpio %d as input\n", | |
589 | gpio); | |
590 | gpio_free(gpio); | |
591 | continue; | |
592 | } | |
aa6e52a3 | 593 | |
aaf9f5fc | 594 | ret = request_irq(gpio_to_irq(gpio), |
aa6e52a3 TP |
595 | ohci_hcd_at91_overcurrent_irq, |
596 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
597 | if (ret) { | |
aaf9f5fc NF |
598 | gpio_free(gpio); |
599 | dev_err(&pdev->dev, | |
600 | "can't get gpio IRQ for overcurrent\n"); | |
aa6e52a3 | 601 | } |
4bde4a4c DB |
602 | } |
603 | } | |
604 | ||
0365ee0a DB |
605 | device_init_wakeup(&pdev->dev, 1); |
606 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
607 | } |
608 | ||
fb4e98ab | 609 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 610 | { |
d4f09e28 | 611 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
612 | int i; |
613 | ||
614 | if (pdata) { | |
0ee6d1ee | 615 | at91_for_each_port(i) { |
8a7a49d1 | 616 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 617 | continue; |
aa6e52a3 | 618 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
619 | gpio_free(pdata->vbus_pin[i]); |
620 | } | |
aa6e52a3 | 621 | |
0ee6d1ee | 622 | at91_for_each_port(i) { |
8a7a49d1 | 623 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
624 | continue; |
625 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
626 | gpio_free(pdata->overcurrent_pin[i]); | |
627 | } | |
4bde4a4c DB |
628 | } |
629 | ||
0365ee0a | 630 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
631 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
632 | return 0; | |
39a269c0 AV |
633 | } |
634 | ||
635 | #ifdef CONFIG_PM | |
39a269c0 | 636 | |
68ba61b8 | 637 | static int |
0365ee0a | 638 | ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) |
68ba61b8 | 639 | { |
0365ee0a DB |
640 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
641 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
642 | ||
118cb990 | 643 | if (device_may_wakeup(&pdev->dev)) |
0365ee0a | 644 | enable_irq_wake(hcd->irq); |
0365ee0a DB |
645 | |
646 | /* | |
647 | * The integrated transceivers seem unable to notice disconnect, | |
648 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
649 | * correctness, always discard connection state (using reset). | |
650 | * | |
651 | * REVISIT: some boards will be able to turn VBUS off... | |
652 | */ | |
653 | if (at91_suspend_entering_slow_clock()) { | |
e3825b48 MG |
654 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
655 | ohci->hc_control &= OHCI_CTRL_RWC; | |
656 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
657 | ohci->rh_state = OHCI_RH_HALTED; | |
658 | ||
869aa98c PV |
659 | /* flush the writes */ |
660 | (void) ohci_readl (ohci, &ohci->regs->control); | |
ed077bb7 | 661 | at91_stop_clock(); |
0365ee0a | 662 | } |
39a269c0 | 663 | |
118cb990 | 664 | return 0; |
39a269c0 AV |
665 | } |
666 | ||
0365ee0a | 667 | static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) |
39a269c0 | 668 | { |
6dde896e MP |
669 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
670 | ||
671 | if (device_may_wakeup(&pdev->dev)) | |
672 | disable_irq_wake(hcd->irq); | |
673 | ||
ed077bb7 AV |
674 | if (!clocked) |
675 | at91_start_clock(); | |
39a269c0 | 676 | |
cfa49b4b | 677 | ohci_resume(hcd, false); |
39a269c0 AV |
678 | return 0; |
679 | } | |
680 | #else | |
681 | #define ohci_hcd_at91_drv_suspend NULL | |
682 | #define ohci_hcd_at91_drv_resume NULL | |
683 | #endif | |
684 | ||
685 | static struct platform_driver ohci_hcd_at91_driver = { | |
686 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 687 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 688 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 AV |
689 | .suspend = ohci_hcd_at91_drv_suspend, |
690 | .resume = ohci_hcd_at91_drv_resume, | |
691 | .driver = { | |
0365ee0a | 692 | .name = "at91_ohci", |
39a269c0 | 693 | .owner = THIS_MODULE, |
2419730f | 694 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
39a269c0 AV |
695 | }, |
696 | }; | |
e3825b48 MG |
697 | |
698 | static int __init ohci_at91_init(void) | |
699 | { | |
700 | if (usb_disabled()) | |
701 | return -ENODEV; | |
702 | ||
703 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
704 | ohci_init_driver(&ohci_at91_hc_driver, NULL); | |
705 | ||
706 | /* | |
707 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
708 | * workarounds. We override certain hc_driver functions here to | |
709 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
710 | * allow this more easily, since this is an unusual case, and we don't | |
711 | * want to encourage others to override these functions by making it | |
712 | * too easy. | |
713 | */ | |
714 | ||
715 | orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; | |
716 | orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; | |
717 | ||
718 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; | |
719 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
720 | ||
721 | return platform_driver_register(&ohci_hcd_at91_driver); | |
722 | } | |
723 | module_init(ohci_at91_init); | |
724 | ||
725 | static void __exit ohci_at91_cleanup(void) | |
726 | { | |
727 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
728 | } | |
729 | module_exit(ohci_at91_cleanup); | |
730 | ||
731 | MODULE_DESCRIPTION(DRIVER_DESC); | |
732 | MODULE_LICENSE("GPL"); | |
733 | MODULE_ALIAS("platform:at91_ohci"); |