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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 (ci->platdata->flags & CI_HDRC_PHY_VBUS_CONTROL &&
67 ci->usb_phy && ci->usb_phy->set_vbus) {
68 if (enable)
69 ci->usb_phy->set_vbus(ci->usb_phy, 1);
70 else
71 ci->usb_phy->set_vbus(ci->usb_phy, 0);
72 }
73
74 if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
75
76
77
78
79 hw_port_test_set(ci, 5);
80 hw_port_test_set(ci, 0);
81 }
82
83 return 0;
84};
85
86static int ehci_ci_reset(struct usb_hcd *hcd)
87{
88 struct device *dev = hcd->self.controller;
89 struct ci_hdrc *ci = dev_get_drvdata(dev);
90 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
91 int ret;
92
93 ret = ehci_setup(hcd);
94 if (ret)
95 return ret;
96
97 ehci->need_io_watchdog = 0;
98
99 if (ci->platdata->notify_event) {
100 ret = ci->platdata->notify_event(ci,
101 CI_HDRC_CONTROLLER_RESET_EVENT);
102 if (ret)
103 return ret;
104 }
105
106 ci_platform_configure(ci);
107
108 return ret;
109}
110
111static const struct ehci_driver_overrides ehci_ci_overrides = {
112 .extra_priv_size = sizeof(struct ehci_ci_priv),
113 .port_power = ehci_ci_portpower,
114 .reset = ehci_ci_reset,
115};
116
117static irqreturn_t host_irq(struct ci_hdrc *ci)
118{
119 return usb_hcd_irq(ci->irq, ci->hcd);
120}
121
122static int host_start(struct ci_hdrc *ci)
123{
124 struct usb_hcd *hcd;
125 struct ehci_hcd *ehci;
126 struct ehci_ci_priv *priv;
127 int ret;
128
129 if (usb_disabled())
130 return -ENODEV;
131
132 hcd = __usb_create_hcd(&ci_ehci_hc_driver, ci->dev->parent,
133 ci->dev, dev_name(ci->dev), NULL);
134 if (!hcd)
135 return -ENOMEM;
136
137 dev_set_drvdata(ci->dev, ci);
138 hcd->rsrc_start = ci->hw_bank.phys;
139 hcd->rsrc_len = ci->hw_bank.size;
140 hcd->regs = ci->hw_bank.abs;
141 hcd->has_tt = 1;
142
143 hcd->power_budget = ci->platdata->power_budget;
144 hcd->tpl_support = ci->platdata->tpl_support;
145 if (ci->phy || ci->usb_phy) {
146 hcd->skip_phy_initialization = 1;
147 if (ci->usb_phy)
148 hcd->usb_phy = ci->usb_phy;
149 }
150
151 ehci = hcd_to_ehci(hcd);
152 ehci->caps = ci->hw_bank.cap;
153 ehci->has_hostpc = ci->hw_bank.lpm;
154 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
155 ehci->imx28_write_fix = ci->imx28_write_fix;
156
157 priv = (struct ehci_ci_priv *)ehci->priv;
158 priv->reg_vbus = NULL;
159
160 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
161 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
162 ret = regulator_enable(ci->platdata->reg_vbus);
163 if (ret) {
164 dev_err(ci->dev,
165 "Failed to enable vbus regulator, ret=%d\n",
166 ret);
167 goto put_hcd;
168 }
169 } else {
170 priv->reg_vbus = ci->platdata->reg_vbus;
171 }
172 }
173
174 if (ci->platdata->pins_host)
175 pinctrl_select_state(ci->platdata->pctl,
176 ci->platdata->pins_host);
177
178 ci->hcd = hcd;
179
180 ret = usb_add_hcd(hcd, 0, 0);
181 if (ret) {
182 ci->hcd = NULL;
183 goto disable_reg;
184 } else {
185 struct usb_otg *otg = &ci->otg;
186
187 if (ci_otg_is_fsm_mode(ci)) {
188 otg->host = &hcd->self;
189 hcd->self.otg_port = 1;
190 }
191
192 if (ci->platdata->notify_event &&
193 (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC))
194 ci->platdata->notify_event
195 (ci, CI_HDRC_IMX_HSIC_ACTIVE_EVENT);
196 }
197
198 return ret;
199
200disable_reg:
201 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
202 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
203 regulator_disable(ci->platdata->reg_vbus);
204put_hcd:
205 usb_put_hcd(hcd);
206
207 return ret;
208}
209
210static void host_stop(struct ci_hdrc *ci)
211{
212 struct usb_hcd *hcd = ci->hcd;
213
214 if (hcd) {
215 if (ci->platdata->notify_event)
216 ci->platdata->notify_event(ci,
217 CI_HDRC_CONTROLLER_STOPPED_EVENT);
218 usb_remove_hcd(hcd);
219 ci->role = CI_ROLE_END;
220 synchronize_irq(ci->irq);
221 usb_put_hcd(hcd);
222 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
223 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
224 regulator_disable(ci->platdata->reg_vbus);
225 }
226 ci->hcd = NULL;
227 ci->otg.host = NULL;
228
229 if (ci->platdata->pins_host && ci->platdata->pins_default)
230 pinctrl_select_state(ci->platdata->pctl,
231 ci->platdata->pins_default);
232}
233
234
235void ci_hdrc_host_destroy(struct ci_hdrc *ci)
236{
237 if (ci->role == CI_ROLE_HOST && ci->hcd)
238 host_stop(ci);
239}
240
241
242static int ci_ehci_hub_control(
243 struct usb_hcd *hcd,
244 u16 typeReq,
245 u16 wValue,
246 u16 wIndex,
247 char *buf,
248 u16 wLength
249)
250{
251 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
252 unsigned int ports = HCS_N_PORTS(ehci->hcs_params);
253 u32 __iomem *status_reg;
254 u32 temp, port_index;
255 unsigned long flags;
256 int retval = 0;
257 bool done = false;
258 struct device *dev = hcd->self.controller;
259 struct ci_hdrc *ci = dev_get_drvdata(dev);
260
261 port_index = wIndex & 0xff;
262 port_index -= (port_index > 0);
263 status_reg = &ehci->regs->port_status[port_index];
264
265 spin_lock_irqsave(&ehci->lock, flags);
266
267 if (ci->platdata->hub_control) {
268 retval = ci->platdata->hub_control(ci, typeReq, wValue, wIndex,
269 buf, wLength, &done, &flags);
270 if (done)
271 goto done;
272 }
273
274 if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
275 if (!wIndex || wIndex > ports) {
276 retval = -EPIPE;
277 goto done;
278 }
279
280 temp = ehci_readl(ehci, status_reg);
281 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
282 retval = -EPIPE;
283 goto done;
284 }
285
286 temp &= ~(PORT_RWC_BITS | PORT_WKCONN_E);
287 temp |= PORT_WKDISC_E | PORT_WKOC_E;
288 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
289
290
291
292
293
294 if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,
295 PORT_SUSPEND, 5000))
296 ehci_err(ehci, "timeout waiting for SUSPEND\n");
297
298 if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
299 if (ci->platdata->notify_event)
300 ci->platdata->notify_event(ci,
301 CI_HDRC_IMX_HSIC_SUSPEND_EVENT);
302
303 temp = ehci_readl(ehci, status_reg);
304 temp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
305 ehci_writel(ehci, temp, status_reg);
306 }
307
308 set_bit(port_index, &ehci->suspended_ports);
309 goto done;
310 }
311
312
313
314
315
316 else if (typeReq == ClearPortFeature &&
317 wValue == USB_PORT_FEAT_C_SUSPEND) {
318
319 if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 25000))
320 ehci_err(ehci, "timeout waiting for resume\n");
321 }
322
323 spin_unlock_irqrestore(&ehci->lock, flags);
324
325
326 return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
327done:
328 spin_unlock_irqrestore(&ehci->lock, flags);
329 return retval;
330}
331static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
332{
333 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
334 struct device *dev = hcd->self.controller;
335 struct ci_hdrc *ci = dev_get_drvdata(dev);
336 int port;
337 u32 tmp;
338
339 int ret = orig_bus_suspend(hcd);
340
341 if (ret)
342 return ret;
343
344 port = HCS_N_PORTS(ehci->hcs_params);
345 while (port--) {
346 u32 __iomem *reg = &ehci->regs->port_status[port];
347 u32 portsc = ehci_readl(ehci, reg);
348
349 if (portsc & PORT_CONNECT) {
350
351
352
353
354
355
356
357
358
359
360 tmp = ehci_readl(ehci, &ehci->regs->command);
361 tmp |= CMD_RUN;
362 ehci_writel(ehci, tmp, &ehci->regs->command);
363
364
365
366 usleep_range(150, 200);
367
368
369
370
371 if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
372 tmp = ehci_readl(ehci, reg);
373 tmp &= ~(PORT_WKDISC_E | PORT_WKCONN_E);
374 ehci_writel(ehci, tmp, reg);
375 }
376
377 break;
378 }
379 }
380
381 return 0;
382}
383
384static void ci_hdrc_free_dma_aligned_buffer(struct urb *urb)
385{
386 struct ci_hdrc_dma_aligned_buffer *temp;
387 size_t length;
388
389 if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER))
390 return;
391
392 temp = container_of(urb->transfer_buffer,
393 struct ci_hdrc_dma_aligned_buffer, data);
394
395 if (usb_urb_dir_in(urb)) {
396 if (usb_pipeisoc(urb->pipe))
397 length = urb->transfer_buffer_length;
398 else
399 length = urb->actual_length;
400
401 memcpy(temp->old_xfer_buffer, temp->data, length);
402 }
403 urb->transfer_buffer = temp->old_xfer_buffer;
404 kfree(temp->kmalloc_ptr);
405
406 urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER;
407}
408
409static int ci_hdrc_alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags)
410{
411 struct ci_hdrc_dma_aligned_buffer *temp, *kmalloc_ptr;
412 const unsigned int ci_hdrc_usb_dma_align = 32;
413 size_t kmalloc_size;
414
415 if (urb->num_sgs || urb->sg || urb->transfer_buffer_length == 0 ||
416 !((uintptr_t)urb->transfer_buffer & (ci_hdrc_usb_dma_align - 1)))
417 return 0;
418
419
420 kmalloc_size = urb->transfer_buffer_length +
421 sizeof(struct ci_hdrc_dma_aligned_buffer) +
422 ci_hdrc_usb_dma_align - 1;
423
424 kmalloc_ptr = kmalloc(kmalloc_size, mem_flags);
425 if (!kmalloc_ptr)
426 return -ENOMEM;
427
428
429 temp = PTR_ALIGN(kmalloc_ptr + 1, ci_hdrc_usb_dma_align) - 1;
430 temp->kmalloc_ptr = kmalloc_ptr;
431 temp->old_xfer_buffer = urb->transfer_buffer;
432 if (usb_urb_dir_out(urb))
433 memcpy(temp->data, urb->transfer_buffer,
434 urb->transfer_buffer_length);
435 urb->transfer_buffer = temp->data;
436
437 urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER;
438
439 return 0;
440}
441
442static int ci_hdrc_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
443 gfp_t mem_flags)
444{
445 int ret;
446
447 ret = ci_hdrc_alloc_dma_aligned_buffer(urb, mem_flags);
448 if (ret)
449 return ret;
450
451 ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
452 if (ret)
453 ci_hdrc_free_dma_aligned_buffer(urb);
454
455 return ret;
456}
457
458static void ci_hdrc_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
459{
460 usb_hcd_unmap_urb_for_dma(hcd, urb);
461 ci_hdrc_free_dma_aligned_buffer(urb);
462}
463
464int ci_hdrc_host_init(struct ci_hdrc *ci)
465{
466 struct ci_role_driver *rdrv;
467
468 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
469 return -ENXIO;
470
471 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
472 if (!rdrv)
473 return -ENOMEM;
474
475 rdrv->start = host_start;
476 rdrv->stop = host_stop;
477 rdrv->irq = host_irq;
478 rdrv->name = "host";
479 ci->roles[CI_ROLE_HOST] = rdrv;
480
481 if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA) {
482 ci_ehci_hc_driver.map_urb_for_dma = ci_hdrc_map_urb_for_dma;
483 ci_ehci_hc_driver.unmap_urb_for_dma = ci_hdrc_unmap_urb_for_dma;
484 }
485
486 return 0;
487}
488
489void ci_hdrc_host_driver_init(void)
490{
491 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
492 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
493 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
494 ci_ehci_hc_driver.hub_control = ci_ehci_hub_control;
495}
496
