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Commit | Line | Data |
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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> |
054d4b7b | 17 | #include <linux/gpio/consumer.h> |
2419730f | 18 | #include <linux/of_platform.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> | |
2e2aa1bc WY |
24 | #include <linux/mfd/syscon.h> |
25 | #include <linux/regmap.h> | |
e3825b48 MG |
26 | #include <linux/usb.h> |
27 | #include <linux/usb/hcd.h> | |
2e2aa1bc | 28 | #include <soc/at91/atmel-sfr.h> |
39a269c0 | 29 | |
e3825b48 | 30 | #include "ohci.h" |
39a269c0 | 31 | |
0ee6d1ee NF |
32 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
33 | #define at91_for_each_port(index) \ | |
34 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
35 | ||
6b0a1cf7 | 36 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
1b207459 SR |
37 | #define hcd_to_ohci_at91_priv(h) \ |
38 | ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) | |
39 | ||
b4f19470 AB |
40 | #define AT91_MAX_USBH_PORTS 3 |
41 | struct at91_usbh_data { | |
054d4b7b WY |
42 | struct gpio_desc *vbus_pin[AT91_MAX_USBH_PORTS]; |
43 | struct gpio_desc *overcurrent_pin[AT91_MAX_USBH_PORTS]; | |
b4f19470 AB |
44 | u8 ports; /* number of ports on root hub */ |
45 | u8 overcurrent_supported; | |
b4f19470 AB |
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 */ |
2e2aa1bc | 56 | struct regmap *sfr_regmap; |
1b207459 | 57 | }; |
e3825b48 MG |
58 | /* interface and function clocks; sometimes also an AHB clock */ |
59 | ||
60 | #define DRIVER_DESC "OHCI Atmel driver" | |
61 | ||
62 | static const char hcd_name[] = "ohci-atmel"; | |
63 | ||
64 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
1b207459 SR |
65 | |
66 | static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = { | |
67 | .extra_priv_size = sizeof(struct ohci_at91_priv), | |
68 | }; | |
39a269c0 | 69 | |
39a269c0 AV |
70 | /*-------------------------------------------------------------------------*/ |
71 | ||
1b207459 | 72 | static void at91_start_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 73 | { |
1cee6b8d SR |
74 | if (ohci_at91->clocked) |
75 | return; | |
963719c8 BB |
76 | |
77 | clk_set_rate(ohci_at91->fclk, 48000000); | |
1b207459 SR |
78 | clk_prepare_enable(ohci_at91->hclk); |
79 | clk_prepare_enable(ohci_at91->iclk); | |
80 | clk_prepare_enable(ohci_at91->fclk); | |
81 | ohci_at91->clocked = true; | |
ed077bb7 AV |
82 | } |
83 | ||
1b207459 | 84 | static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 85 | { |
1cee6b8d SR |
86 | if (!ohci_at91->clocked) |
87 | return; | |
963719c8 | 88 | |
1b207459 SR |
89 | clk_disable_unprepare(ohci_at91->fclk); |
90 | clk_disable_unprepare(ohci_at91->iclk); | |
91 | clk_disable_unprepare(ohci_at91->hclk); | |
1b207459 | 92 | ohci_at91->clocked = false; |
ed077bb7 AV |
93 | } |
94 | ||
39a269c0 AV |
95 | static void at91_start_hc(struct platform_device *pdev) |
96 | { | |
97 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
98 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 99 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 100 | |
0365ee0a | 101 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
102 | |
103 | /* | |
104 | * Start the USB clocks. | |
105 | */ | |
1b207459 | 106 | at91_start_clock(ohci_at91); |
39a269c0 AV |
107 | |
108 | /* | |
109 | * The USB host controller must remain in reset. | |
110 | */ | |
111 | writel(0, ®s->control); | |
112 | } | |
113 | ||
114 | static void at91_stop_hc(struct platform_device *pdev) | |
115 | { | |
116 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
117 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 118 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 119 | |
0365ee0a | 120 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
121 | |
122 | /* | |
123 | * Put the USB host controller into reset. | |
124 | */ | |
125 | writel(0, ®s->control); | |
126 | ||
127 | /* | |
128 | * Stop the USB clocks. | |
129 | */ | |
1b207459 | 130 | at91_stop_clock(ohci_at91); |
39a269c0 AV |
131 | } |
132 | ||
133 | ||
134 | /*-------------------------------------------------------------------------*/ | |
135 | ||
fb4e98ab | 136 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 | 137 | |
9cdd8e11 | 138 | static struct regmap *at91_dt_syscon_sfr(void) |
2e2aa1bc WY |
139 | { |
140 | struct regmap *regmap; | |
141 | ||
142 | regmap = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); | |
143 | if (IS_ERR(regmap)) | |
144 | regmap = NULL; | |
145 | ||
146 | return regmap; | |
147 | } | |
148 | ||
39a269c0 AV |
149 | /* configure so an HC device and id are always provided */ |
150 | /* always called with process context; sleeping is OK */ | |
151 | ||
152 | ||
153 | /** | |
0365ee0a | 154 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
155 | * Context: !in_interrupt() |
156 | * | |
157 | * Allocates basic resources for this USB host controller, and | |
158 | * then invokes the start() method for the HCD associated with it | |
159 | * through the hotplug entry's driver_data. | |
39a269c0 | 160 | */ |
41ac7b3a | 161 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 162 | struct platform_device *pdev) |
39a269c0 | 163 | { |
e3825b48 MG |
164 | struct at91_usbh_data *board; |
165 | struct ohci_hcd *ohci; | |
39a269c0 | 166 | int retval; |
3b3394af | 167 | struct usb_hcd *hcd; |
1b207459 | 168 | struct ohci_at91_priv *ohci_at91; |
fb5f1834 BB |
169 | struct device *dev = &pdev->dev; |
170 | struct resource *res; | |
171 | int irq; | |
172 | ||
fb5f1834 BB |
173 | irq = platform_get_irq(pdev, 0); |
174 | if (irq < 0) { | |
175 | dev_dbg(dev, "hcd probe: missing irq resource\n"); | |
176 | return irq; | |
39a269c0 AV |
177 | } |
178 | ||
5b218a07 | 179 | hcd = usb_create_hcd(driver, dev, "at91"); |
39a269c0 AV |
180 | if (!hcd) |
181 | return -ENOMEM; | |
1b207459 | 182 | ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 183 | |
04dc3150 | 184 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
cca2bbb3 BB |
185 | hcd->regs = devm_ioremap_resource(dev, res); |
186 | if (IS_ERR(hcd->regs)) { | |
187 | retval = PTR_ERR(hcd->regs); | |
188 | goto err; | |
39a269c0 | 189 | } |
04dc3150 VB |
190 | hcd->rsrc_start = res->start; |
191 | hcd->rsrc_len = resource_size(res); | |
39a269c0 | 192 | |
1b207459 SR |
193 | ohci_at91->iclk = devm_clk_get(dev, "ohci_clk"); |
194 | if (IS_ERR(ohci_at91->iclk)) { | |
5b218a07 | 195 | dev_err(dev, "failed to get ohci_clk\n"); |
1b207459 | 196 | retval = PTR_ERR(ohci_at91->iclk); |
cca2bbb3 | 197 | goto err; |
6813463c | 198 | } |
1b207459 SR |
199 | ohci_at91->fclk = devm_clk_get(dev, "uhpck"); |
200 | if (IS_ERR(ohci_at91->fclk)) { | |
5b218a07 | 201 | dev_err(dev, "failed to get uhpck\n"); |
1b207459 | 202 | retval = PTR_ERR(ohci_at91->fclk); |
fc7a3252 | 203 | goto err; |
6813463c | 204 | } |
1b207459 SR |
205 | ohci_at91->hclk = devm_clk_get(dev, "hclk"); |
206 | if (IS_ERR(ohci_at91->hclk)) { | |
5b218a07 | 207 | dev_err(dev, "failed to get hclk\n"); |
1b207459 | 208 | retval = PTR_ERR(ohci_at91->hclk); |
fc7a3252 | 209 | goto err; |
6813463c | 210 | } |
39a269c0 | 211 | |
2e2aa1bc WY |
212 | ohci_at91->sfr_regmap = at91_dt_syscon_sfr(); |
213 | if (!ohci_at91->sfr_regmap) | |
214 | dev_warn(dev, "failed to find sfr node\n"); | |
215 | ||
e3825b48 MG |
216 | board = hcd->self.controller->platform_data; |
217 | ohci = hcd_to_ohci(hcd); | |
218 | ohci->num_ports = board->ports; | |
39a269c0 | 219 | at91_start_hc(pdev); |
39a269c0 | 220 | |
ed19ece1 WY |
221 | /* |
222 | * The RemoteWakeupConnected bit has to be set explicitly | |
223 | * before calling ohci_run. The reset value of this bit is 0. | |
224 | */ | |
225 | ohci->hc_control = OHCI_CTRL_RWC; | |
226 | ||
fb5f1834 | 227 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1f53b485 | 228 | if (retval == 0) { |
3c9740a1 | 229 | device_wakeup_enable(hcd->self.controller); |
39a269c0 | 230 | return retval; |
3c9740a1 | 231 | } |
39a269c0 AV |
232 | |
233 | /* Error handling */ | |
234 | at91_stop_hc(pdev); | |
235 | ||
cca2bbb3 | 236 | err: |
39a269c0 AV |
237 | usb_put_hcd(hcd); |
238 | return retval; | |
239 | } | |
240 | ||
241 | ||
39a269c0 AV |
242 | /* may be called with controller, bus, and devices active */ |
243 | ||
244 | /** | |
0365ee0a | 245 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
246 | * @dev: USB Host Controller being removed |
247 | * Context: !in_interrupt() | |
248 | * | |
249 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
250 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 251 | * context, "rmmod" or something similar. |
39a269c0 AV |
252 | * |
253 | */ | |
fb4e98ab | 254 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 255 | struct platform_device *pdev) |
39a269c0 AV |
256 | { |
257 | usb_remove_hcd(hcd); | |
258 | at91_stop_hc(pdev); | |
421b4bf5 | 259 | usb_put_hcd(hcd); |
39a269c0 AV |
260 | } |
261 | ||
262 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
263 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
264 | { | |
0ee6d1ee | 265 | if (!valid_port(port)) |
aa6e52a3 TP |
266 | return; |
267 | ||
8f12dc24 | 268 | gpiod_set_value(pdata->vbus_pin[port], enable); |
aa6e52a3 TP |
269 | } |
270 | ||
271 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
272 | { | |
0ee6d1ee | 273 | if (!valid_port(port)) |
aa6e52a3 TP |
274 | return -EINVAL; |
275 | ||
8f12dc24 | 276 | return gpiod_get_value(pdata->vbus_pin[port]); |
aa6e52a3 TP |
277 | } |
278 | ||
279 | /* | |
280 | * Update the status data from the hub with the over-current indicator change. | |
281 | */ | |
282 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
283 | { | |
e3825b48 | 284 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
42b59eba | 285 | int length = ohci_hub_status_data(hcd, buf); |
aa6e52a3 TP |
286 | int port; |
287 | ||
0ee6d1ee | 288 | at91_for_each_port(port) { |
aa6e52a3 | 289 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 290 | if (!length) |
aa6e52a3 TP |
291 | length = 1; |
292 | buf[0] |= 1 << (port + 1); | |
293 | } | |
294 | } | |
295 | ||
296 | return length; | |
297 | } | |
298 | ||
2e2aa1bc WY |
299 | static int ohci_at91_port_suspend(struct regmap *regmap, u8 set) |
300 | { | |
301 | u32 regval; | |
302 | int ret; | |
303 | ||
304 | if (!regmap) | |
305 | return 0; | |
306 | ||
307 | ret = regmap_read(regmap, AT91_SFR_OHCIICR, ®val); | |
308 | if (ret) | |
309 | return ret; | |
310 | ||
311 | if (set) | |
312 | regval |= AT91_OHCIICR_USB_SUSPEND; | |
313 | else | |
314 | regval &= ~AT91_OHCIICR_USB_SUSPEND; | |
315 | ||
316 | regmap_write(regmap, AT91_SFR_OHCIICR, regval); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
aa6e52a3 TP |
321 | /* |
322 | * Look at the control requests to the root hub and see if we need to override. | |
323 | */ | |
324 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
325 | u16 wIndex, char *buf, u16 wLength) | |
326 | { | |
d4f09e28 | 327 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
2e2aa1bc | 328 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
aa6e52a3 TP |
329 | struct usb_hub_descriptor *desc; |
330 | int ret = -EINVAL; | |
331 | u32 *data = (u32 *)buf; | |
332 | ||
333 | dev_dbg(hcd->self.controller, | |
334 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
335 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
336 | ||
0ee6d1ee NF |
337 | wIndex--; |
338 | ||
aa6e52a3 TP |
339 | switch (typeReq) { |
340 | case SetPortFeature: | |
2e2aa1bc WY |
341 | switch (wValue) { |
342 | case USB_PORT_FEAT_POWER: | |
aa6e52a3 | 343 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); |
0ee6d1ee NF |
344 | if (valid_port(wIndex)) { |
345 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
346 | ret = 0; | |
347 | } | |
348 | ||
aa6e52a3 | 349 | goto out; |
2e2aa1bc WY |
350 | |
351 | case USB_PORT_FEAT_SUSPEND: | |
352 | dev_dbg(hcd->self.controller, "SetPortFeat: SUSPEND\n"); | |
85550f91 | 353 | if (valid_port(wIndex) && ohci_at91->sfr_regmap) { |
2e2aa1bc WY |
354 | ohci_at91_port_suspend(ohci_at91->sfr_regmap, |
355 | 1); | |
356 | return 0; | |
357 | } | |
358 | break; | |
aa6e52a3 TP |
359 | } |
360 | break; | |
361 | ||
362 | case ClearPortFeature: | |
363 | switch (wValue) { | |
364 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
365 | dev_dbg(hcd->self.controller, | |
366 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
367 | ||
0ee6d1ee NF |
368 | if (valid_port(wIndex)) { |
369 | pdata->overcurrent_changed[wIndex] = 0; | |
370 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
371 | } |
372 | ||
373 | goto out; | |
374 | ||
375 | case USB_PORT_FEAT_OVER_CURRENT: | |
376 | dev_dbg(hcd->self.controller, | |
377 | "ClearPortFeature: OVER_CURRENT\n"); | |
378 | ||
0ee6d1ee NF |
379 | if (valid_port(wIndex)) |
380 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
381 | |
382 | goto out; | |
383 | ||
384 | case USB_PORT_FEAT_POWER: | |
385 | dev_dbg(hcd->self.controller, | |
386 | "ClearPortFeature: POWER\n"); | |
387 | ||
0ee6d1ee NF |
388 | if (valid_port(wIndex)) { |
389 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
390 | return 0; |
391 | } | |
2e2aa1bc WY |
392 | break; |
393 | ||
394 | case USB_PORT_FEAT_SUSPEND: | |
395 | dev_dbg(hcd->self.controller, "ClearPortFeature: SUSPEND\n"); | |
85550f91 | 396 | if (valid_port(wIndex) && ohci_at91->sfr_regmap) { |
2e2aa1bc WY |
397 | ohci_at91_port_suspend(ohci_at91->sfr_regmap, |
398 | 0); | |
399 | return 0; | |
400 | } | |
401 | break; | |
aa6e52a3 TP |
402 | } |
403 | break; | |
404 | } | |
405 | ||
42b59eba | 406 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
aa6e52a3 TP |
407 | if (ret) |
408 | goto out; | |
409 | ||
410 | switch (typeReq) { | |
411 | case GetHubDescriptor: | |
412 | ||
413 | /* update the hub's descriptor */ | |
414 | ||
415 | desc = (struct usb_hub_descriptor *)buf; | |
416 | ||
417 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
418 | desc->wHubCharacteristics); | |
419 | ||
420 | /* remove the old configurations for power-switching, and | |
421 | * over-current protection, and insert our new configuration | |
422 | */ | |
423 | ||
424 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
a9c49bcd SS |
425 | desc->wHubCharacteristics |= |
426 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM); | |
aa6e52a3 TP |
427 | |
428 | if (pdata->overcurrent_supported) { | |
429 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
a9c49bcd SS |
430 | desc->wHubCharacteristics |= |
431 | cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM); | |
aa6e52a3 TP |
432 | } |
433 | ||
434 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
435 | desc->wHubCharacteristics); | |
436 | ||
437 | return ret; | |
438 | ||
439 | case GetPortStatus: | |
440 | /* check port status */ | |
441 | ||
442 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
443 | ||
0ee6d1ee NF |
444 | if (valid_port(wIndex)) { |
445 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 446 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 447 | |
0ee6d1ee | 448 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 449 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 450 | |
0ee6d1ee | 451 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 452 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
453 | } |
454 | } | |
455 | ||
456 | out: | |
457 | return ret; | |
458 | } | |
459 | ||
39a269c0 AV |
460 | /*-------------------------------------------------------------------------*/ |
461 | ||
aa6e52a3 TP |
462 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
463 | { | |
464 | struct platform_device *pdev = data; | |
d4f09e28 | 465 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
054d4b7b | 466 | int val, port; |
aa6e52a3 TP |
467 | |
468 | /* From the GPIO notifying the over-current situation, find | |
469 | * out the corresponding port */ | |
0ee6d1ee | 470 | at91_for_each_port(port) { |
054d4b7b | 471 | if (gpiod_to_irq(pdata->overcurrent_pin[port]) == irq) |
aa6e52a3 TP |
472 | break; |
473 | } | |
474 | ||
0ee6d1ee | 475 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
476 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
477 | return IRQ_HANDLED; | |
478 | } | |
479 | ||
054d4b7b | 480 | val = gpiod_get_value(pdata->overcurrent_pin[port]); |
aa6e52a3 TP |
481 | |
482 | /* When notified of an over-current situation, disable power | |
483 | on the corresponding port, and mark this port in | |
484 | over-current. */ | |
0ee6d1ee | 485 | if (!val) { |
aa6e52a3 TP |
486 | ohci_at91_usb_set_power(pdata, port, 0); |
487 | pdata->overcurrent_status[port] = 1; | |
488 | pdata->overcurrent_changed[port] = 1; | |
489 | } | |
490 | ||
491 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
492 | val ? "exited" : "notified"); | |
493 | ||
494 | return IRQ_HANDLED; | |
495 | } | |
496 | ||
2419730f JCPV |
497 | static const struct of_device_id at91_ohci_dt_ids[] = { |
498 | { .compatible = "atmel,at91rm9200-ohci" }, | |
499 | { /* sentinel */ } | |
500 | }; | |
501 | ||
502 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
503 | ||
bd73bfcd AB |
504 | /*-------------------------------------------------------------------------*/ |
505 | ||
506 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) | |
2419730f JCPV |
507 | { |
508 | struct device_node *np = pdev->dev.of_node; | |
2419730f | 509 | struct at91_usbh_data *pdata; |
bd73bfcd | 510 | int i; |
bd73bfcd | 511 | int ret; |
054d4b7b | 512 | int err; |
bd73bfcd | 513 | u32 ports; |
2419730f JCPV |
514 | |
515 | /* Right now device-tree probed devices don't get dma_mask set. | |
516 | * Since shared usb code relies on it, set it here for now. | |
517 | * Once we have dma capability bindings this can go away. | |
518 | */ | |
e1fd7341 | 519 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
520 | if (ret) |
521 | return ret; | |
2419730f JCPV |
522 | |
523 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
524 | if (!pdata) | |
525 | return -ENOMEM; | |
526 | ||
4a0c4c36 AB |
527 | pdev->dev.platform_data = pdata; |
528 | ||
2419730f JCPV |
529 | if (!of_property_read_u32(np, "num-ports", &ports)) |
530 | pdata->ports = ports; | |
531 | ||
bd73bfcd | 532 | at91_for_each_port(i) { |
8f12dc24 PR |
533 | if (i >= pdata->ports) |
534 | break; | |
535 | ||
536 | pdata->vbus_pin[i] = | |
537 | devm_gpiod_get_index_optional(&pdev->dev, "atmel,vbus", | |
538 | i, GPIOD_OUT_HIGH); | |
054d4b7b WY |
539 | if (IS_ERR(pdata->vbus_pin[i])) { |
540 | err = PTR_ERR(pdata->vbus_pin[i]); | |
541 | dev_err(&pdev->dev, "unable to claim gpio \"vbus\": %d\n", err); | |
e4df9227 | 542 | continue; |
bd73bfcd | 543 | } |
bd73bfcd | 544 | } |
aaf9f5fc | 545 | |
bd73bfcd | 546 | at91_for_each_port(i) { |
4a0c4c36 AB |
547 | if (i >= pdata->ports) |
548 | break; | |
e4df9227 AB |
549 | |
550 | pdata->overcurrent_pin[i] = | |
8f12dc24 PR |
551 | devm_gpiod_get_index_optional(&pdev->dev, "atmel,oc", |
552 | i, GPIOD_IN); | |
054d4b7b WY |
553 | if (IS_ERR(pdata->overcurrent_pin[i])) { |
554 | err = PTR_ERR(pdata->overcurrent_pin[i]); | |
555 | dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err); | |
bd73bfcd | 556 | continue; |
aa6e52a3 TP |
557 | } |
558 | ||
054d4b7b WY |
559 | ret = devm_request_irq(&pdev->dev, |
560 | gpiod_to_irq(pdata->overcurrent_pin[i]), | |
561 | ohci_hcd_at91_overcurrent_irq, | |
562 | IRQF_SHARED, | |
563 | "ohci_overcurrent", pdev); | |
564 | if (ret) | |
565 | dev_info(&pdev->dev, "failed to request gpio \"overcurrent\" IRQ\n"); | |
4bde4a4c DB |
566 | } |
567 | ||
0365ee0a DB |
568 | device_init_wakeup(&pdev->dev, 1); |
569 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
570 | } |
571 | ||
fb4e98ab | 572 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 573 | { |
d4f09e28 | 574 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
575 | int i; |
576 | ||
577 | if (pdata) { | |
054d4b7b | 578 | at91_for_each_port(i) |
aa6e52a3 | 579 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
580 | } |
581 | ||
0365ee0a | 582 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
583 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
584 | return 0; | |
39a269c0 AV |
585 | } |
586 | ||
d2905193 | 587 | static int __maybe_unused |
94ac0e5d | 588 | ohci_hcd_at91_drv_suspend(struct device *dev) |
68ba61b8 | 589 | { |
94ac0e5d | 590 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
0365ee0a | 591 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
1b207459 | 592 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
a9d3840e | 593 | int ret; |
0365ee0a | 594 | |
1cee6b8d SR |
595 | /* |
596 | * Disable wakeup if we are going to sleep with slow clock mode | |
597 | * enabled. | |
598 | */ | |
599 | ohci_at91->wakeup = device_may_wakeup(dev) | |
600 | && !at91_suspend_entering_slow_clock(); | |
601 | ||
602 | if (ohci_at91->wakeup) | |
0365ee0a | 603 | enable_irq_wake(hcd->irq); |
0365ee0a | 604 | |
2e2aa1bc WY |
605 | ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1); |
606 | ||
1cee6b8d | 607 | ret = ohci_suspend(hcd, ohci_at91->wakeup); |
a9d3840e | 608 | if (ret) { |
1cee6b8d SR |
609 | if (ohci_at91->wakeup) |
610 | disable_irq_wake(hcd->irq); | |
a9d3840e MG |
611 | return ret; |
612 | } | |
0365ee0a DB |
613 | /* |
614 | * The integrated transceivers seem unable to notice disconnect, | |
615 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
616 | * correctness, always discard connection state (using reset). | |
617 | * | |
618 | * REVISIT: some boards will be able to turn VBUS off... | |
619 | */ | |
1cee6b8d | 620 | if (!ohci_at91->wakeup) { |
e3825b48 MG |
621 | ohci->rh_state = OHCI_RH_HALTED; |
622 | ||
869aa98c PV |
623 | /* flush the writes */ |
624 | (void) ohci_readl (ohci, &ohci->regs->control); | |
1b207459 | 625 | at91_stop_clock(ohci_at91); |
0365ee0a | 626 | } |
39a269c0 | 627 | |
a9d3840e | 628 | return ret; |
39a269c0 AV |
629 | } |
630 | ||
d2905193 AB |
631 | static int __maybe_unused |
632 | ohci_hcd_at91_drv_resume(struct device *dev) | |
39a269c0 | 633 | { |
94ac0e5d | 634 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
1b207459 | 635 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
6dde896e | 636 | |
1cee6b8d | 637 | if (ohci_at91->wakeup) |
6dde896e MP |
638 | disable_irq_wake(hcd->irq); |
639 | ||
1cee6b8d | 640 | at91_start_clock(ohci_at91); |
39a269c0 | 641 | |
cfa49b4b | 642 | ohci_resume(hcd, false); |
2e2aa1bc WY |
643 | |
644 | ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0); | |
645 | ||
39a269c0 AV |
646 | return 0; |
647 | } | |
39a269c0 | 648 | |
94ac0e5d SR |
649 | static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend, |
650 | ohci_hcd_at91_drv_resume); | |
651 | ||
39a269c0 AV |
652 | static struct platform_driver ohci_hcd_at91_driver = { |
653 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 654 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 655 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 | 656 | .driver = { |
0365ee0a | 657 | .name = "at91_ohci", |
94ac0e5d | 658 | .pm = &ohci_hcd_at91_pm_ops, |
be12be54 | 659 | .of_match_table = at91_ohci_dt_ids, |
39a269c0 AV |
660 | }, |
661 | }; | |
e3825b48 MG |
662 | |
663 | static int __init ohci_at91_init(void) | |
664 | { | |
665 | if (usb_disabled()) | |
666 | return -ENODEV; | |
667 | ||
668 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
1b207459 | 669 | ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides); |
e3825b48 MG |
670 | |
671 | /* | |
672 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
673 | * workarounds. We override certain hc_driver functions here to | |
674 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
675 | * allow this more easily, since this is an unusual case, and we don't | |
676 | * want to encourage others to override these functions by making it | |
677 | * too easy. | |
678 | */ | |
679 | ||
e3825b48 MG |
680 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
681 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
682 | ||
683 | return platform_driver_register(&ohci_hcd_at91_driver); | |
684 | } | |
685 | module_init(ohci_at91_init); | |
686 | ||
687 | static void __exit ohci_at91_cleanup(void) | |
688 | { | |
689 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
690 | } | |
691 | module_exit(ohci_at91_cleanup); | |
692 | ||
693 | MODULE_DESCRIPTION(DRIVER_DESC); | |
694 | MODULE_LICENSE("GPL"); | |
695 | MODULE_ALIAS("platform:at91_ohci"); |