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10#include <linux/kernel.h>
11#include <linux/io.h>
12#include <linux/usb.h>
13#include <linux/usb/hcd.h>
14#include <linux/usb/chipidea.h>
15#include <linux/regulator/consumer.h>
16#include <linux/pinctrl/consumer.h>
17
18#include "../host/ehci.h"
19
20#include "ci.h"
21#include "bits.h"
22#include "host.h"
23
24static struct hc_driver __read_mostly ci_ehci_hc_driver;
25static int (*orig_bus_suspend)(struct usb_hcd *hcd);
26
27struct ehci_ci_priv {
28 struct regulator *reg_vbus;
29 bool enabled;
30};
31
32struct ci_hdrc_dma_aligned_buffer {
33 void *kmalloc_ptr;
34 void *old_xfer_buffer;
35 u8 data[];
36};
37
38static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
39{
40 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
41 struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
42 struct device *dev = hcd->self.controller;
43 struct ci_hdrc *ci = dev_get_drvdata(dev);
44 int ret = 0;
45 int port = HCS_N_PORTS(ehci->hcs_params);
46
47 if (priv->reg_vbus && enable != priv->enabled) {
48 if (port > 1) {
49 dev_warn(dev,
50 "Not support multi-port regulator control\n");
51 return 0;
52 }
53 if (enable)
54 ret = regulator_enable(priv->reg_vbus);
55 else
56 ret = regulator_disable(priv->reg_vbus);
57 if (ret) {
58 dev_err(dev,
59 "Failed to %s vbus regulator, ret=%d\n",
60 enable ? "enable" : "disable", ret);
61 return ret;
62 }
63 priv->enabled = enable;
64 }
65
66 if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
67
68
69
70
71 hw_port_test_set(ci, 5);
72 hw_port_test_set(ci, 0);
73 }
74 return 0;
75};
76
77static int ehci_ci_reset(struct usb_hcd *hcd)
78{
79 struct device *dev = hcd->self.controller;
80 struct ci_hdrc *ci = dev_get_drvdata(dev);
81 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
82 int ret;
83
84 ret = ehci_setup(hcd);
85 if (ret)
86 return ret;
87
88 ehci->need_io_watchdog = 0;
89
90 if (ci->platdata->notify_event) {
91 ret = ci->platdata->notify_event(ci,
92 CI_HDRC_CONTROLLER_RESET_EVENT);
93 if (ret)
94 return ret;
95 }
96
97 ci_platform_configure(ci);
98
99 return ret;
100}
101
102static const struct ehci_driver_overrides ehci_ci_overrides = {
103 .extra_priv_size = sizeof(struct ehci_ci_priv),
104 .port_power = ehci_ci_portpower,
105 .reset = ehci_ci_reset,
106};
107
108static irqreturn_t host_irq(struct ci_hdrc *ci)
109{
110 return usb_hcd_irq(ci->irq, ci->hcd);
111}
112
113static int host_start(struct ci_hdrc *ci)
114{
115 struct usb_hcd *hcd;
116 struct ehci_hcd *ehci;
117 struct ehci_ci_priv *priv;
118 int ret;
119
120 if (usb_disabled())
121 return -ENODEV;
122
123 hcd = __usb_create_hcd(&ci_ehci_hc_driver, ci->dev->parent,
124 ci->dev, dev_name(ci->dev), NULL);
125 if (!hcd)
126 return -ENOMEM;
127
128 dev_set_drvdata(ci->dev, ci);
129 hcd->rsrc_start = ci->hw_bank.phys;
130 hcd->rsrc_len = ci->hw_bank.size;
131 hcd->regs = ci->hw_bank.abs;
132 hcd->has_tt = 1;
133
134 hcd->power_budget = ci->platdata->power_budget;
135 hcd->tpl_support = ci->platdata->tpl_support;
136 if (ci->phy || ci->usb_phy) {
137 hcd->skip_phy_initialization = 1;
138 if (ci->usb_phy)
139 hcd->usb_phy = ci->usb_phy;
140 }
141
142 ehci = hcd_to_ehci(hcd);
143 ehci->caps = ci->hw_bank.cap;
144 ehci->has_hostpc = ci->hw_bank.lpm;
145 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
146 ehci->imx28_write_fix = ci->imx28_write_fix;
147
148 priv = (struct ehci_ci_priv *)ehci->priv;
149 priv->reg_vbus = NULL;
150
151 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
152 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
153 ret = regulator_enable(ci->platdata->reg_vbus);
154 if (ret) {
155 dev_err(ci->dev,
156 "Failed to enable vbus regulator, ret=%d\n",
157 ret);
158 goto put_hcd;
159 }
160 } else {
161 priv->reg_vbus = ci->platdata->reg_vbus;
162 }
163 }
164
165 if (ci->platdata->pins_host)
166 pinctrl_select_state(ci->platdata->pctl,
167 ci->platdata->pins_host);
168
169 ci->hcd = hcd;
170
171 ret = usb_add_hcd(hcd, 0, 0);
172 if (ret) {
173 ci->hcd = NULL;
174 goto disable_reg;
175 } else {
176 struct usb_otg *otg = &ci->otg;
177
178 if (ci_otg_is_fsm_mode(ci)) {
179 otg->host = &hcd->self;
180 hcd->self.otg_port = 1;
181 }
182
183 if (ci->platdata->notify_event &&
184 (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC))
185 ci->platdata->notify_event
186 (ci, CI_HDRC_IMX_HSIC_ACTIVE_EVENT);
187 }
188
189 return ret;
190
191disable_reg:
192 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
193 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
194 regulator_disable(ci->platdata->reg_vbus);
195put_hcd:
196 usb_put_hcd(hcd);
197
198 return ret;
199}
200
201static void host_stop(struct ci_hdrc *ci)
202{
203 struct usb_hcd *hcd = ci->hcd;
204
205 if (hcd) {
206 if (ci->platdata->notify_event)
207 ci->platdata->notify_event(ci,
208 CI_HDRC_CONTROLLER_STOPPED_EVENT);
209 usb_remove_hcd(hcd);
210 ci->role = CI_ROLE_END;
211 synchronize_irq(ci->irq);
212 usb_put_hcd(hcd);
213 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
214 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
215 regulator_disable(ci->platdata->reg_vbus);
216 }
217 ci->hcd = NULL;
218 ci->otg.host = NULL;
219
220 if (ci->platdata->pins_host && ci->platdata->pins_default)
221 pinctrl_select_state(ci->platdata->pctl,
222 ci->platdata->pins_default);
223}
224
225
226void ci_hdrc_host_destroy(struct ci_hdrc *ci)
227{
228 if (ci->role == CI_ROLE_HOST && ci->hcd)
229 host_stop(ci);
230}
231
232
233static int ci_ehci_hub_control(
234 struct usb_hcd *hcd,
235 u16 typeReq,
236 u16 wValue,
237 u16 wIndex,
238 char *buf,
239 u16 wLength
240)
241{
242 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
243 u32 __iomem *status_reg;
244 u32 temp;
245 unsigned long flags;
246 int retval = 0;
247 bool done = false;
248 struct device *dev = hcd->self.controller;
249 struct ci_hdrc *ci = dev_get_drvdata(dev);
250
251 status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
252
253 spin_lock_irqsave(&ehci->lock, flags);
254
255 if (ci->platdata->hub_control) {
256 retval = ci->platdata->hub_control(ci, typeReq, wValue, wIndex,
257 buf, wLength, &done, &flags);
258 if (done)
259 goto done;
260 }
261
262 if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
263 temp = ehci_readl(ehci, status_reg);
264 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
265 retval = -EPIPE;
266 goto done;
267 }
268
269 temp &= ~(PORT_RWC_BITS | PORT_WKCONN_E);
270 temp |= PORT_WKDISC_E | PORT_WKOC_E;
271 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
272
273
274
275
276
277 if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,
278 PORT_SUSPEND, 5000))
279 ehci_err(ehci, "timeout waiting for SUSPEND\n");
280
281 if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
282 if (ci->platdata->notify_event)
283 ci->platdata->notify_event(ci,
284 CI_HDRC_IMX_HSIC_SUSPEND_EVENT);
285
286 temp = ehci_readl(ehci, status_reg);
287 temp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
288 ehci_writel(ehci, temp, status_reg);
289 }
290
291 set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
292 goto done;
293 }
294
295
296
297
298
299 else if (typeReq == ClearPortFeature &&
300 wValue == USB_PORT_FEAT_C_SUSPEND) {
301
302 if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 25000))
303 ehci_err(ehci, "timeout waiting for resume\n");
304 }
305
306 spin_unlock_irqrestore(&ehci->lock, flags);
307
308
309 return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
310done:
311 spin_unlock_irqrestore(&ehci->lock, flags);
312 return retval;
313}
314static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
315{
316 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
317 struct device *dev = hcd->self.controller;
318 struct ci_hdrc *ci = dev_get_drvdata(dev);
319 int port;
320 u32 tmp;
321
322 int ret = orig_bus_suspend(hcd);
323
324 if (ret)
325 return ret;
326
327 port = HCS_N_PORTS(ehci->hcs_params);
328 while (port--) {
329 u32 __iomem *reg = &ehci->regs->port_status[port];
330 u32 portsc = ehci_readl(ehci, reg);
331
332 if (portsc & PORT_CONNECT) {
333
334
335
336
337
338
339
340
341
342
343 tmp = ehci_readl(ehci, &ehci->regs->command);
344 tmp |= CMD_RUN;
345 ehci_writel(ehci, tmp, &ehci->regs->command);
346
347
348
349 usleep_range(150, 200);
350
351
352
353
354 if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
355 tmp = ehci_readl(ehci, reg);
356 tmp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
357 ehci_writel(ehci, tmp, reg);
358 }
359
360 break;
361 }
362 }
363
364 return 0;
365}
366
367static void ci_hdrc_free_dma_aligned_buffer(struct urb *urb)
368{
369 struct ci_hdrc_dma_aligned_buffer *temp;
370 size_t length;
371
372 if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER))
373 return;
374
375 temp = container_of(urb->transfer_buffer,
376 struct ci_hdrc_dma_aligned_buffer, data);
377
378 if (usb_urb_dir_in(urb)) {
379 if (usb_pipeisoc(urb->pipe))
380 length = urb->transfer_buffer_length;
381 else
382 length = urb->actual_length;
383
384 memcpy(temp->old_xfer_buffer, temp->data, length);
385 }
386 urb->transfer_buffer = temp->old_xfer_buffer;
387 kfree(temp->kmalloc_ptr);
388
389 urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER;
390}
391
392static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
393{
394 struct ci_hdrc_dma_aligned_buffer *temp, *kmalloc_ptr;
395 const unsigned int ci_hdrc_usb_dma_align = 32;
396 size_t kmalloc_size;
397
398 if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0 ||
399 !((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)))
400 return 0;
401
402
403 kmalloc_size = urb->transfer_buffer_length +
404 sizeof(struct ci_hdrc_dma_aligned_buffer) +
405 ci_hdrc_usb_dma_align - 1;
406
407 kmalloc_ptr = kmalloc(kmalloc_size, mem_flags);
408 if (!kmalloc_ptr)
409 return -ENOMEM;
410
411
412 temp = PTR_ALIGN(kmalloc_ptr + 1, ci_hdrc_usb_dma_align) - 1;
413 temp->kmalloc_ptr = kmalloc_ptr;
414 temp->old_xfer_buffer = urb->transfer_buffer;
415 if (usb_urb_dir_out(urb))
416 memcpy(temp->data, urb->transfer_buffer,
417 urb->transfer_buffer_length);
418 urb->transfer_buffer = temp->data;
419
420 urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER;
421
422 return 0;
423}
424
425static int ci_hdrc_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
426 gfp_t mem_flags)
427{
428 int ret;
429
430 ret = ci_hdrc_alloc_dma_aligned_buffer(urb, mem_flags);
431 if (ret)
432 return ret;
433
434 ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
435 if (ret)
436 ci_hdrc_free_dma_aligned_buffer(urb);
437
438 return ret;
439}
440
441static void ci_hdrc_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
442{
443 usb_hcd_unmap_urb_for_dma(hcd, urb);
444 ci_hdrc_free_dma_aligned_buffer(urb);
445}
446
447int ci_hdrc_host_init(struct ci_hdrc *ci)
448{
449 struct ci_role_driver *rdrv;
450
451 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
452 return -ENXIO;
453
454 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
455 if (!rdrv)
456 return -ENOMEM;
457
458 rdrv->start = host_start;
459 rdrv->stop = host_stop;
460 rdrv->irq = host_irq;
461 rdrv->name = "host";
462 ci->roles[CI_ROLE_HOST] = rdrv;
463
464 if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA) {
465 ci_ehci_hc_driver.map_urb_for_dma = ci_hdrc_map_urb_for_dma;
466 ci_ehci_hc_driver.unmap_urb_for_dma = ci_hdrc_unmap_urb_for_dma;
467 }
468
469 return 0;
470}
471
472void ci_hdrc_host_driver_init(void)
473{
474 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
475 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
476 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
477 ci_ehci_hc_driver.hub_control = ci_ehci_hub_control;
478}
479
