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1/*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * TI DA8xx (OMAP-L1x) Bus Glue
5 *
6 * Derived from: ohci-omap.c and ohci-s3c2410.c
7 * Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
8 *
9 * This file is licensed under the terms of the GNU General Public License
10 * version 2. This program is licensed "as is" without any warranty of any
11 * kind, whether express or implied.
12 */
13
14#include <linux/interrupt.h>
15#include <linux/jiffies.h>
16#include <linux/platform_device.h>
17#include <linux/clk.h>
18
19#include <mach/da8xx.h>
20#include <linux/platform_data/usb-davinci.h>
21
22#ifndef CONFIG_ARCH_DAVINCI_DA8XX
23#error "This file is DA8xx bus glue. Define CONFIG_ARCH_DAVINCI_DA8XX."
24#endif
25
26#define CFGCHIP2 DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)
27
28static struct clk *usb11_clk;
29static struct clk *usb20_clk;
30
31/* Over-current indicator change bitmask */
32static volatile u16 ocic_mask;
33
34static void ohci_da8xx_clock(int on)
35{
36 u32 cfgchip2;
37
38 cfgchip2 = __raw_readl(CFGCHIP2);
39 if (on) {
40 clk_enable(usb11_clk);
41
42 /*
43 * If USB 1.1 reference clock is sourced from USB 2.0 PHY, we
44 * need to enable the USB 2.0 module clocking, start its PHY,
45 * and not allow it to stop the clock during USB 2.0 suspend.
46 */
47 if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX)) {
48 clk_enable(usb20_clk);
49
50 cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN);
51 cfgchip2 |= CFGCHIP2_PHY_PLLON;
52 __raw_writel(cfgchip2, CFGCHIP2);
53
54 pr_info("Waiting for USB PHY clock good...\n");
55 while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD))
56 cpu_relax();
57 }
58
59 /* Enable USB 1.1 PHY */
60 cfgchip2 |= CFGCHIP2_USB1SUSPENDM;
61 } else {
62 clk_disable(usb11_clk);
63 if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX))
64 clk_disable(usb20_clk);
65
66 /* Disable USB 1.1 PHY */
67 cfgchip2 &= ~CFGCHIP2_USB1SUSPENDM;
68 }
69 __raw_writel(cfgchip2, CFGCHIP2);
70}
71
72/*
73 * Handle the port over-current indicator change.
74 */
75static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub,
76 unsigned port)
77{
78 ocic_mask |= 1 << port;
79
80 /* Once over-current is detected, the port needs to be powered down */
81 if (hub->get_oci(port) > 0)
82 hub->set_power(port, 0);
83}
84
85static int ohci_da8xx_init(struct usb_hcd *hcd)
86{
87 struct device *dev = hcd->self.controller;
88 struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
89 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
90 int result;
91 u32 rh_a;
92
93 dev_dbg(dev, "starting USB controller\n");
94
95 ohci_da8xx_clock(1);
96
97 /*
98 * DA8xx only have 1 port connected to the pins but the HC root hub
99 * register A reports 2 ports, thus we'll have to override it...
100 */
101 ohci->num_ports = 1;
102
103 result = ohci_init(ohci);
104 if (result < 0)
105 return result;
106
107 /*
108 * Since we're providing a board-specific root hub port power control
109 * and over-current reporting, we have to override the HC root hub A
110 * register's default value, so that ohci_hub_control() could return
111 * the correct hub descriptor...
112 */
113 rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
114 if (hub->set_power) {
115 rh_a &= ~RH_A_NPS;
116 rh_a |= RH_A_PSM;
117 }
118 if (hub->get_oci) {
119 rh_a &= ~RH_A_NOCP;
120 rh_a |= RH_A_OCPM;
121 }
122 rh_a &= ~RH_A_POTPGT;
123 rh_a |= hub->potpgt << 24;
124 ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
125
126 return result;
127}
128
129static void ohci_da8xx_stop(struct usb_hcd *hcd)
130{
131 ohci_stop(hcd);
132 ohci_da8xx_clock(0);
133}
134
135static int ohci_da8xx_start(struct usb_hcd *hcd)
136{
137 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
138 int result;
139
140 result = ohci_run(ohci);
141 if (result < 0)
142 ohci_da8xx_stop(hcd);
143
144 return result;
145}
146
147/*
148 * Update the status data from the hub with the over-current indicator change.
149 */
150static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf)
151{
152 int length = ohci_hub_status_data(hcd, buf);
153
154 /* See if we have OCIC bit set on port 1 */
155 if (ocic_mask & (1 << 1)) {
156 dev_dbg(hcd->self.controller, "over-current indicator change "
157 "on port 1\n");
158
159 if (!length)
160 length = 1;
161
162 buf[0] |= 1 << 1;
163 }
164 return length;
165}
166
167/*
168 * Look at the control requests to the root hub and see if we need to override.
169 */
170static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
171 u16 wIndex, char *buf, u16 wLength)
172{
173 struct device *dev = hcd->self.controller;
174 struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
175 int temp;
176
177 switch (typeReq) {
178 case GetPortStatus:
179 /* Check the port number */
180 if (wIndex != 1)
181 break;
182
183 dev_dbg(dev, "GetPortStatus(%u)\n", wIndex);
184
185 temp = roothub_portstatus(hcd_to_ohci(hcd), wIndex - 1);
186
187 /* The port power status (PPS) bit defaults to 1 */
188 if (hub->get_power && hub->get_power(wIndex) == 0)
189 temp &= ~RH_PS_PPS;
190
191 /* The port over-current indicator (POCI) bit is always 0 */
192 if (hub->get_oci && hub->get_oci(wIndex) > 0)
193 temp |= RH_PS_POCI;
194
195 /* The over-current indicator change (OCIC) bit is 0 too */
196 if (ocic_mask & (1 << wIndex))
197 temp |= RH_PS_OCIC;
198
199 put_unaligned(cpu_to_le32(temp), (__le32 *)buf);
200 return 0;
201 case SetPortFeature:
202 temp = 1;
203 goto check_port;
204 case ClearPortFeature:
205 temp = 0;
206
207check_port:
208 /* Check the port number */
209 if (wIndex != 1)
210 break;
211
212 switch (wValue) {
213 case USB_PORT_FEAT_POWER:
214 dev_dbg(dev, "%sPortFeature(%u): %s\n",
215 temp ? "Set" : "Clear", wIndex, "POWER");
216
217 if (!hub->set_power)
218 return -EPIPE;
219
220 return hub->set_power(wIndex, temp) ? -EPIPE : 0;
221 case USB_PORT_FEAT_C_OVER_CURRENT:
222 dev_dbg(dev, "%sPortFeature(%u): %s\n",
223 temp ? "Set" : "Clear", wIndex,
224 "C_OVER_CURRENT");
225
226 if (temp)
227 ocic_mask |= 1 << wIndex;
228 else
229 ocic_mask &= ~(1 << wIndex);
230 return 0;
231 }
232 }
233
234 return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
235}
236
237static const struct hc_driver ohci_da8xx_hc_driver = {
238 .description = hcd_name,
239 .product_desc = "DA8xx OHCI",
240 .hcd_priv_size = sizeof(struct ohci_hcd),
241
242 /*
243 * generic hardware linkage
244 */
245 .irq = ohci_irq,
246 .flags = HCD_USB11 | HCD_MEMORY,
247
248 /*
249 * basic lifecycle operations
250 */
251 .reset = ohci_da8xx_init,
252 .start = ohci_da8xx_start,
253 .stop = ohci_da8xx_stop,
254 .shutdown = ohci_shutdown,
255
256 /*
257 * managing i/o requests and associated device resources
258 */
259 .urb_enqueue = ohci_urb_enqueue,
260 .urb_dequeue = ohci_urb_dequeue,
261 .endpoint_disable = ohci_endpoint_disable,
262
263 /*
264 * scheduling support
265 */
266 .get_frame_number = ohci_get_frame,
267
268 /*
269 * root hub support
270 */
271 .hub_status_data = ohci_da8xx_hub_status_data,
272 .hub_control = ohci_da8xx_hub_control,
273
274#ifdef CONFIG_PM
275 .bus_suspend = ohci_bus_suspend,
276 .bus_resume = ohci_bus_resume,
277#endif
278 .start_port_reset = ohci_start_port_reset,
279};
280
281/*-------------------------------------------------------------------------*/
282
283
284/**
285 * usb_hcd_da8xx_probe - initialize DA8xx-based HCDs
286 * Context: !in_interrupt()
287 *
288 * Allocates basic resources for this USB host controller, and
289 * then invokes the start() method for the HCD associated with it
290 * through the hotplug entry's driver_data.
291 */
292static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
293 struct platform_device *pdev)
294{
295 struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev);
296 struct usb_hcd *hcd;
297 struct resource *mem;
298 int error, irq;
299
300 if (hub == NULL)
301 return -ENODEV;
302
303 usb11_clk = devm_clk_get(&pdev->dev, "usb11");
304 if (IS_ERR(usb11_clk))
305 return PTR_ERR(usb11_clk);
306
307 usb20_clk = devm_clk_get(&pdev->dev, "usb20");
308 if (IS_ERR(usb20_clk))
309 return PTR_ERR(usb20_clk);
310
311 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
312 if (!hcd)
313 return -ENOMEM;
314
315 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
316 hcd->regs = devm_ioremap_resource(&pdev->dev, mem);
317 if (IS_ERR(hcd->regs)) {
318 error = PTR_ERR(hcd->regs);
319 goto err;
320 }
321 hcd->rsrc_start = mem->start;
322 hcd->rsrc_len = resource_size(mem);
323
324 ohci_hcd_init(hcd_to_ohci(hcd));
325
326 irq = platform_get_irq(pdev, 0);
327 if (irq < 0) {
328 error = -ENODEV;
329 goto err;
330 }
331 error = usb_add_hcd(hcd, irq, 0);
332 if (error)
333 goto err;
334
335 device_wakeup_enable(hcd->self.controller);
336
337 if (hub->ocic_notify) {
338 error = hub->ocic_notify(ohci_da8xx_ocic_handler);
339 if (!error)
340 return 0;
341 }
342
343 usb_remove_hcd(hcd);
344err:
345 usb_put_hcd(hcd);
346 return error;
347}
348
349/**
350 * usb_hcd_da8xx_remove - shutdown processing for DA8xx-based HCDs
351 * @dev: USB Host Controller being removed
352 * Context: !in_interrupt()
353 *
354 * Reverses the effect of usb_hcd_da8xx_probe(), first invoking
355 * the HCD's stop() method. It is always called from a thread
356 * context, normally "rmmod", "apmd", or something similar.
357 */
358static inline void
359usb_hcd_da8xx_remove(struct usb_hcd *hcd, struct platform_device *pdev)
360{
361 struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev);
362
363 hub->ocic_notify(NULL);
364 usb_remove_hcd(hcd);
365 usb_put_hcd(hcd);
366}
367
368static int ohci_hcd_da8xx_drv_probe(struct platform_device *dev)
369{
370 return usb_hcd_da8xx_probe(&ohci_da8xx_hc_driver, dev);
371}
372
373static int ohci_hcd_da8xx_drv_remove(struct platform_device *dev)
374{
375 struct usb_hcd *hcd = platform_get_drvdata(dev);
376
377 usb_hcd_da8xx_remove(hcd, dev);
378
379 return 0;
380}
381
382#ifdef CONFIG_PM
383static int ohci_da8xx_suspend(struct platform_device *pdev,
384 pm_message_t message)
385{
386 struct usb_hcd *hcd = platform_get_drvdata(pdev);
387 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
388 bool do_wakeup = device_may_wakeup(&pdev->dev);
389 int ret;
390
391
392 if (time_before(jiffies, ohci->next_statechange))
393 msleep(5);
394 ohci->next_statechange = jiffies;
395
396 ret = ohci_suspend(hcd, do_wakeup);
397 if (ret)
398 return ret;
399
400 ohci_da8xx_clock(0);
401 hcd->state = HC_STATE_SUSPENDED;
402
403 return ret;
404}
405
406static int ohci_da8xx_resume(struct platform_device *dev)
407{
408 struct usb_hcd *hcd = platform_get_drvdata(dev);
409 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
410
411 if (time_before(jiffies, ohci->next_statechange))
412 msleep(5);
413 ohci->next_statechange = jiffies;
414
415 ohci_da8xx_clock(1);
416 dev->dev.power.power_state = PMSG_ON;
417 usb_hcd_resume_root_hub(hcd);
418 return 0;
419}
420#endif
421
422/*
423 * Driver definition to register with platform structure.
424 */
425static struct platform_driver ohci_hcd_da8xx_driver = {
426 .probe = ohci_hcd_da8xx_drv_probe,
427 .remove = ohci_hcd_da8xx_drv_remove,
428 .shutdown = usb_hcd_platform_shutdown,
429#ifdef CONFIG_PM
430 .suspend = ohci_da8xx_suspend,
431 .resume = ohci_da8xx_resume,
432#endif
433 .driver = {
434 .name = "ohci",
435 },
436};
437
438MODULE_ALIAS("platform:ohci");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 * TI DA8xx (OMAP-L1x) Bus Glue
6 *
7 * Derived from: ohci-omap.c and ohci-s3c2410.c
8 * Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
9 */
10
11#include <linux/clk.h>
12#include <linux/gpio/consumer.h>
13#include <linux/io.h>
14#include <linux/interrupt.h>
15#include <linux/jiffies.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/platform_device.h>
19#include <linux/phy/phy.h>
20#include <linux/platform_data/usb-davinci.h>
21#include <linux/regulator/consumer.h>
22#include <linux/usb.h>
23#include <linux/usb/hcd.h>
24#include <asm/unaligned.h>
25
26#include "ohci.h"
27
28#define DRIVER_DESC "DA8XX"
29#define DRV_NAME "ohci-da8xx"
30
31static struct hc_driver __read_mostly ohci_da8xx_hc_driver;
32
33static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq,
34 u16 wValue, u16 wIndex, char *buf, u16 wLength);
35static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf);
36
37struct da8xx_ohci_hcd {
38 struct usb_hcd *hcd;
39 struct clk *usb11_clk;
40 struct phy *usb11_phy;
41 struct regulator *vbus_reg;
42 struct notifier_block nb;
43 struct gpio_desc *oc_gpio;
44};
45
46#define to_da8xx_ohci(hcd) (struct da8xx_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
47
48/* Over-current indicator change bitmask */
49static volatile u16 ocic_mask;
50
51static int ohci_da8xx_enable(struct usb_hcd *hcd)
52{
53 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
54 int ret;
55
56 ret = clk_prepare_enable(da8xx_ohci->usb11_clk);
57 if (ret)
58 return ret;
59
60 ret = phy_init(da8xx_ohci->usb11_phy);
61 if (ret)
62 goto err_phy_init;
63
64 ret = phy_power_on(da8xx_ohci->usb11_phy);
65 if (ret)
66 goto err_phy_power_on;
67
68 return 0;
69
70err_phy_power_on:
71 phy_exit(da8xx_ohci->usb11_phy);
72err_phy_init:
73 clk_disable_unprepare(da8xx_ohci->usb11_clk);
74
75 return ret;
76}
77
78static void ohci_da8xx_disable(struct usb_hcd *hcd)
79{
80 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
81
82 phy_power_off(da8xx_ohci->usb11_phy);
83 phy_exit(da8xx_ohci->usb11_phy);
84 clk_disable_unprepare(da8xx_ohci->usb11_clk);
85}
86
87static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on)
88{
89 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
90 struct device *dev = hcd->self.controller;
91 int ret;
92
93 if (!da8xx_ohci->vbus_reg)
94 return 0;
95
96 if (on) {
97 ret = regulator_enable(da8xx_ohci->vbus_reg);
98 if (ret) {
99 dev_err(dev, "Failed to enable regulator: %d\n", ret);
100 return ret;
101 }
102 } else {
103 ret = regulator_disable(da8xx_ohci->vbus_reg);
104 if (ret) {
105 dev_err(dev, "Failed to disable regulator: %d\n", ret);
106 return ret;
107 }
108 }
109
110 return 0;
111}
112
113static int ohci_da8xx_get_power(struct usb_hcd *hcd)
114{
115 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
116
117 if (da8xx_ohci->vbus_reg)
118 return regulator_is_enabled(da8xx_ohci->vbus_reg);
119
120 return 1;
121}
122
123static int ohci_da8xx_get_oci(struct usb_hcd *hcd)
124{
125 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
126 unsigned int flags;
127 int ret;
128
129 if (da8xx_ohci->oc_gpio)
130 return gpiod_get_value_cansleep(da8xx_ohci->oc_gpio);
131
132 if (!da8xx_ohci->vbus_reg)
133 return 0;
134
135 ret = regulator_get_error_flags(da8xx_ohci->vbus_reg, &flags);
136 if (ret)
137 return ret;
138
139 if (flags & REGULATOR_ERROR_OVER_CURRENT)
140 return 1;
141
142 return 0;
143}
144
145static int ohci_da8xx_has_set_power(struct usb_hcd *hcd)
146{
147 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
148
149 if (da8xx_ohci->vbus_reg)
150 return 1;
151
152 return 0;
153}
154
155static int ohci_da8xx_has_oci(struct usb_hcd *hcd)
156{
157 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
158
159 if (da8xx_ohci->oc_gpio)
160 return 1;
161
162 if (da8xx_ohci->vbus_reg)
163 return 1;
164
165 return 0;
166}
167
168static int ohci_da8xx_has_potpgt(struct usb_hcd *hcd)
169{
170 struct device *dev = hcd->self.controller;
171 struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
172
173 if (hub && hub->potpgt)
174 return 1;
175
176 return 0;
177}
178
179static int ohci_da8xx_regulator_event(struct notifier_block *nb,
180 unsigned long event, void *data)
181{
182 struct da8xx_ohci_hcd *da8xx_ohci =
183 container_of(nb, struct da8xx_ohci_hcd, nb);
184
185 if (event & REGULATOR_EVENT_OVER_CURRENT) {
186 ocic_mask |= 1 << 1;
187 ohci_da8xx_set_power(da8xx_ohci->hcd, 0);
188 }
189
190 return 0;
191}
192
193static irqreturn_t ohci_da8xx_oc_thread(int irq, void *data)
194{
195 struct da8xx_ohci_hcd *da8xx_ohci = data;
196 struct device *dev = da8xx_ohci->hcd->self.controller;
197 int ret;
198
199 if (gpiod_get_value_cansleep(da8xx_ohci->oc_gpio) &&
200 da8xx_ohci->vbus_reg) {
201 ret = regulator_disable(da8xx_ohci->vbus_reg);
202 if (ret)
203 dev_err(dev, "Failed to disable regulator: %d\n", ret);
204 }
205
206 return IRQ_HANDLED;
207}
208
209static int ohci_da8xx_register_notify(struct usb_hcd *hcd)
210{
211 struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
212 struct device *dev = hcd->self.controller;
213 int ret = 0;
214
215 if (!da8xx_ohci->oc_gpio && da8xx_ohci->vbus_reg) {
216 da8xx_ohci->nb.notifier_call = ohci_da8xx_regulator_event;
217 ret = devm_regulator_register_notifier(da8xx_ohci->vbus_reg,
218 &da8xx_ohci->nb);
219 }
220
221 if (ret)
222 dev_err(dev, "Failed to register notifier: %d\n", ret);
223
224 return ret;
225}
226
227static int ohci_da8xx_reset(struct usb_hcd *hcd)
228{
229 struct device *dev = hcd->self.controller;
230 struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
231 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
232 int result;
233 u32 rh_a;
234
235 dev_dbg(dev, "starting USB controller\n");
236
237 result = ohci_da8xx_enable(hcd);
238 if (result < 0)
239 return result;
240
241 /*
242 * DA8xx only have 1 port connected to the pins but the HC root hub
243 * register A reports 2 ports, thus we'll have to override it...
244 */
245 ohci->num_ports = 1;
246
247 result = ohci_setup(hcd);
248 if (result < 0) {
249 ohci_da8xx_disable(hcd);
250 return result;
251 }
252
253 /*
254 * Since we're providing a board-specific root hub port power control
255 * and over-current reporting, we have to override the HC root hub A
256 * register's default value, so that ohci_hub_control() could return
257 * the correct hub descriptor...
258 */
259 rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
260 if (ohci_da8xx_has_set_power(hcd)) {
261 rh_a &= ~RH_A_NPS;
262 rh_a |= RH_A_PSM;
263 }
264 if (ohci_da8xx_has_oci(hcd)) {
265 rh_a &= ~RH_A_NOCP;
266 rh_a |= RH_A_OCPM;
267 }
268 if (ohci_da8xx_has_potpgt(hcd)) {
269 rh_a &= ~RH_A_POTPGT;
270 rh_a |= hub->potpgt << 24;
271 }
272 ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
273
274 return result;
275}
276
277/*
278 * Update the status data from the hub with the over-current indicator change.
279 */
280static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf)
281{
282 int length = orig_ohci_hub_status_data(hcd, buf);
283
284 /* See if we have OCIC bit set on port 1 */
285 if (ocic_mask & (1 << 1)) {
286 dev_dbg(hcd->self.controller, "over-current indicator change "
287 "on port 1\n");
288
289 if (!length)
290 length = 1;
291
292 buf[0] |= 1 << 1;
293 }
294 return length;
295}
296
297/*
298 * Look at the control requests to the root hub and see if we need to override.
299 */
300static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
301 u16 wIndex, char *buf, u16 wLength)
302{
303 struct device *dev = hcd->self.controller;
304 int temp;
305
306 switch (typeReq) {
307 case GetPortStatus:
308 /* Check the port number */
309 if (wIndex != 1)
310 break;
311
312 dev_dbg(dev, "GetPortStatus(%u)\n", wIndex);
313
314 temp = roothub_portstatus(hcd_to_ohci(hcd), wIndex - 1);
315
316 /* The port power status (PPS) bit defaults to 1 */
317 if (!ohci_da8xx_get_power(hcd))
318 temp &= ~RH_PS_PPS;
319
320 /* The port over-current indicator (POCI) bit is always 0 */
321 if (ohci_da8xx_get_oci(hcd) > 0)
322 temp |= RH_PS_POCI;
323
324 /* The over-current indicator change (OCIC) bit is 0 too */
325 if (ocic_mask & (1 << wIndex))
326 temp |= RH_PS_OCIC;
327
328 put_unaligned(cpu_to_le32(temp), (__le32 *)buf);
329 return 0;
330 case SetPortFeature:
331 temp = 1;
332 goto check_port;
333 case ClearPortFeature:
334 temp = 0;
335
336check_port:
337 /* Check the port number */
338 if (wIndex != 1)
339 break;
340
341 switch (wValue) {
342 case USB_PORT_FEAT_POWER:
343 dev_dbg(dev, "%sPortFeature(%u): %s\n",
344 temp ? "Set" : "Clear", wIndex, "POWER");
345
346 return ohci_da8xx_set_power(hcd, temp) ? -EPIPE : 0;
347 case USB_PORT_FEAT_C_OVER_CURRENT:
348 dev_dbg(dev, "%sPortFeature(%u): %s\n",
349 temp ? "Set" : "Clear", wIndex,
350 "C_OVER_CURRENT");
351
352 if (temp)
353 ocic_mask |= 1 << wIndex;
354 else
355 ocic_mask &= ~(1 << wIndex);
356 return 0;
357 }
358 }
359
360 return orig_ohci_hub_control(hcd, typeReq, wValue,
361 wIndex, buf, wLength);
362}
363
364/*-------------------------------------------------------------------------*/
365#ifdef CONFIG_OF
366static const struct of_device_id da8xx_ohci_ids[] = {
367 { .compatible = "ti,da830-ohci" },
368 { }
369};
370MODULE_DEVICE_TABLE(of, da8xx_ohci_ids);
371#endif
372
373static int ohci_da8xx_probe(struct platform_device *pdev)
374{
375 struct da8xx_ohci_hcd *da8xx_ohci;
376 struct device *dev = &pdev->dev;
377 int error, hcd_irq, oc_irq;
378 struct usb_hcd *hcd;
379 struct resource *mem;
380
381 hcd = usb_create_hcd(&ohci_da8xx_hc_driver, dev, dev_name(dev));
382 if (!hcd)
383 return -ENOMEM;
384
385 da8xx_ohci = to_da8xx_ohci(hcd);
386 da8xx_ohci->hcd = hcd;
387
388 da8xx_ohci->usb11_clk = devm_clk_get(dev, NULL);
389 if (IS_ERR(da8xx_ohci->usb11_clk)) {
390 error = PTR_ERR(da8xx_ohci->usb11_clk);
391 if (error != -EPROBE_DEFER)
392 dev_err(dev, "Failed to get clock.\n");
393 goto err;
394 }
395
396 da8xx_ohci->usb11_phy = devm_phy_get(dev, "usb-phy");
397 if (IS_ERR(da8xx_ohci->usb11_phy)) {
398 error = PTR_ERR(da8xx_ohci->usb11_phy);
399 if (error != -EPROBE_DEFER)
400 dev_err(dev, "Failed to get phy.\n");
401 goto err;
402 }
403
404 da8xx_ohci->vbus_reg = devm_regulator_get_optional(dev, "vbus");
405 if (IS_ERR(da8xx_ohci->vbus_reg)) {
406 error = PTR_ERR(da8xx_ohci->vbus_reg);
407 if (error == -ENODEV) {
408 da8xx_ohci->vbus_reg = NULL;
409 } else if (error == -EPROBE_DEFER) {
410 goto err;
411 } else {
412 dev_err(dev, "Failed to get regulator\n");
413 goto err;
414 }
415 }
416
417 da8xx_ohci->oc_gpio = devm_gpiod_get_optional(dev, "oc", GPIOD_IN);
418 if (IS_ERR(da8xx_ohci->oc_gpio)) {
419 error = PTR_ERR(da8xx_ohci->oc_gpio);
420 goto err;
421 }
422
423 if (da8xx_ohci->oc_gpio) {
424 oc_irq = gpiod_to_irq(da8xx_ohci->oc_gpio);
425 if (oc_irq < 0) {
426 error = oc_irq;
427 goto err;
428 }
429
430 error = devm_request_threaded_irq(dev, oc_irq, NULL,
431 ohci_da8xx_oc_thread, IRQF_TRIGGER_RISING |
432 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
433 "OHCI over-current indicator", da8xx_ohci);
434 if (error)
435 goto err;
436 }
437
438 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
439 hcd->regs = devm_ioremap_resource(dev, mem);
440 if (IS_ERR(hcd->regs)) {
441 error = PTR_ERR(hcd->regs);
442 goto err;
443 }
444 hcd->rsrc_start = mem->start;
445 hcd->rsrc_len = resource_size(mem);
446
447 hcd_irq = platform_get_irq(pdev, 0);
448 if (hcd_irq < 0) {
449 error = -ENODEV;
450 goto err;
451 }
452
453 error = usb_add_hcd(hcd, hcd_irq, 0);
454 if (error)
455 goto err;
456
457 device_wakeup_enable(hcd->self.controller);
458
459 error = ohci_da8xx_register_notify(hcd);
460 if (error)
461 goto err_remove_hcd;
462
463 return 0;
464
465err_remove_hcd:
466 usb_remove_hcd(hcd);
467err:
468 usb_put_hcd(hcd);
469 return error;
470}
471
472static int ohci_da8xx_remove(struct platform_device *pdev)
473{
474 struct usb_hcd *hcd = platform_get_drvdata(pdev);
475
476 usb_remove_hcd(hcd);
477 usb_put_hcd(hcd);
478
479 return 0;
480}
481
482#ifdef CONFIG_PM
483static int ohci_da8xx_suspend(struct platform_device *pdev,
484 pm_message_t message)
485{
486 struct usb_hcd *hcd = platform_get_drvdata(pdev);
487 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
488 bool do_wakeup = device_may_wakeup(&pdev->dev);
489 int ret;
490
491
492 if (time_before(jiffies, ohci->next_statechange))
493 msleep(5);
494 ohci->next_statechange = jiffies;
495
496 ret = ohci_suspend(hcd, do_wakeup);
497 if (ret)
498 return ret;
499
500 ohci_da8xx_disable(hcd);
501 hcd->state = HC_STATE_SUSPENDED;
502
503 return ret;
504}
505
506static int ohci_da8xx_resume(struct platform_device *dev)
507{
508 struct usb_hcd *hcd = platform_get_drvdata(dev);
509 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
510 int ret;
511
512 if (time_before(jiffies, ohci->next_statechange))
513 msleep(5);
514 ohci->next_statechange = jiffies;
515
516 ret = ohci_da8xx_enable(hcd);
517 if (ret)
518 return ret;
519
520 ohci_resume(hcd, false);
521
522 return 0;
523}
524#endif
525
526static const struct ohci_driver_overrides da8xx_overrides __initconst = {
527 .reset = ohci_da8xx_reset,
528 .extra_priv_size = sizeof(struct da8xx_ohci_hcd),
529};
530
531/*
532 * Driver definition to register with platform structure.
533 */
534static struct platform_driver ohci_hcd_da8xx_driver = {
535 .probe = ohci_da8xx_probe,
536 .remove = ohci_da8xx_remove,
537 .shutdown = usb_hcd_platform_shutdown,
538#ifdef CONFIG_PM
539 .suspend = ohci_da8xx_suspend,
540 .resume = ohci_da8xx_resume,
541#endif
542 .driver = {
543 .name = DRV_NAME,
544 .of_match_table = of_match_ptr(da8xx_ohci_ids),
545 },
546};
547
548static int __init ohci_da8xx_init(void)
549{
550
551 if (usb_disabled())
552 return -ENODEV;
553
554 ohci_init_driver(&ohci_da8xx_hc_driver, &da8xx_overrides);
555
556 /*
557 * The Davinci da8xx HW has some unusual quirks, which require
558 * da8xx-specific workarounds. We override certain hc_driver
559 * functions here to achieve that. We explicitly do not enhance
560 * ohci_driver_overrides to allow this more easily, since this
561 * is an unusual case, and we don't want to encourage others to
562 * override these functions by making it too easy.
563 */
564
565 orig_ohci_hub_control = ohci_da8xx_hc_driver.hub_control;
566 orig_ohci_hub_status_data = ohci_da8xx_hc_driver.hub_status_data;
567
568 ohci_da8xx_hc_driver.hub_status_data = ohci_da8xx_hub_status_data;
569 ohci_da8xx_hc_driver.hub_control = ohci_da8xx_hub_control;
570
571 return platform_driver_register(&ohci_hcd_da8xx_driver);
572}
573module_init(ohci_da8xx_init);
574
575static void __exit ohci_da8xx_exit(void)
576{
577 platform_driver_unregister(&ohci_hcd_da8xx_driver);
578}
579module_exit(ohci_da8xx_exit);
580MODULE_DESCRIPTION(DRIVER_DESC);
581MODULE_LICENSE("GPL");
582MODULE_ALIAS("platform:" DRV_NAME);