Commit | Line | Data |
---|---|---|
550a7375 FB |
1 | /* |
2 | * MUSB OTG driver virtual root hub support | |
3 | * | |
4 | * Copyright 2005 Mentor Graphics Corporation | |
5 | * Copyright (C) 2005-2006 by Texas Instruments | |
6 | * Copyright (C) 2006-2007 Nokia Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED | |
23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
25 | * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
29 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
35 | #include <linux/module.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/sched.h> | |
550a7375 | 38 | #include <linux/errno.h> |
550a7375 FB |
39 | #include <linux/time.h> |
40 | #include <linux/timer.h> | |
41 | ||
42 | #include <asm/unaligned.h> | |
43 | ||
44 | #include "musb_core.h" | |
45 | ||
8ed1fb79 DM |
46 | void musb_host_finish_resume(struct work_struct *work) |
47 | { | |
48 | struct musb *musb; | |
49 | unsigned long flags; | |
50 | u8 power; | |
51 | ||
fa6997d3 | 52 | musb = container_of(work, struct musb, finish_resume_work.work); |
8ed1fb79 DM |
53 | |
54 | spin_lock_irqsave(&musb->lock, flags); | |
55 | ||
56 | power = musb_readb(musb->mregs, MUSB_POWER); | |
57 | power &= ~MUSB_POWER_RESUME; | |
58 | dev_dbg(musb->controller, "root port resume stopped, power %02x\n", | |
59 | power); | |
60 | musb_writeb(musb->mregs, MUSB_POWER, power); | |
61 | ||
62 | /* | |
63 | * ISSUE: DaVinci (RTL 1.300) disconnects after | |
64 | * resume of high speed peripherals (but not full | |
65 | * speed ones). | |
66 | */ | |
67 | musb->is_active = 1; | |
68 | musb->port1_status &= ~(USB_PORT_STAT_SUSPEND | MUSB_PORT_STAT_RESUME); | |
69 | musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; | |
70 | usb_hcd_poll_rh_status(musb->hcd); | |
71 | /* NOTE: it might really be A_WAIT_BCON ... */ | |
e47d9254 | 72 | musb->xceiv->otg->state = OTG_STATE_A_HOST; |
8ed1fb79 DM |
73 | |
74 | spin_unlock_irqrestore(&musb->lock, flags); | |
75 | } | |
76 | ||
94f72136 | 77 | void musb_port_suspend(struct musb *musb, bool do_suspend) |
550a7375 | 78 | { |
d445b6da | 79 | struct usb_otg *otg = musb->xceiv->otg; |
550a7375 FB |
80 | u8 power; |
81 | void __iomem *mbase = musb->mregs; | |
82 | ||
83 | if (!is_host_active(musb)) | |
84 | return; | |
85 | ||
86 | /* NOTE: this doesn't necessarily put PHY into low power mode, | |
87 | * turning off its clock; that's a function of PHY integration and | |
88 | * MUSB_POWER_ENSUSPEND. PHY may need a clock (sigh) to detect | |
89 | * SE0 changing to connect (J) or wakeup (K) states. | |
90 | */ | |
91 | power = musb_readb(mbase, MUSB_POWER); | |
92 | if (do_suspend) { | |
93 | int retries = 10000; | |
94 | ||
95 | power &= ~MUSB_POWER_RESUME; | |
96 | power |= MUSB_POWER_SUSPENDM; | |
97 | musb_writeb(mbase, MUSB_POWER, power); | |
98 | ||
99 | /* Needed for OPT A tests */ | |
100 | power = musb_readb(mbase, MUSB_POWER); | |
101 | while (power & MUSB_POWER_SUSPENDM) { | |
102 | power = musb_readb(mbase, MUSB_POWER); | |
103 | if (retries-- < 1) | |
104 | break; | |
105 | } | |
106 | ||
5c8a86e1 | 107 | dev_dbg(musb->controller, "Root port suspended, power %02x\n", power); |
550a7375 FB |
108 | |
109 | musb->port1_status |= USB_PORT_STAT_SUSPEND; | |
e47d9254 | 110 | switch (musb->xceiv->otg->state) { |
550a7375 | 111 | case OTG_STATE_A_HOST: |
e47d9254 | 112 | musb->xceiv->otg->state = OTG_STATE_A_SUSPEND; |
032ec49f | 113 | musb->is_active = otg->host->b_hnp_enable; |
ab983f2a DB |
114 | if (musb->is_active) |
115 | mod_timer(&musb->otg_timer, jiffies | |
116 | + msecs_to_jiffies( | |
117 | OTG_TIME_A_AIDL_BDIS)); | |
550a7375 FB |
118 | musb_platform_try_idle(musb, 0); |
119 | break; | |
550a7375 | 120 | case OTG_STATE_B_HOST: |
e47d9254 | 121 | musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON; |
032ec49f | 122 | musb->is_active = otg->host->b_hnp_enable; |
550a7375 FB |
123 | musb_platform_try_idle(musb, 0); |
124 | break; | |
550a7375 | 125 | default: |
5c8a86e1 | 126 | dev_dbg(musb->controller, "bogus rh suspend? %s\n", |
e47d9254 | 127 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
128 | } |
129 | } else if (power & MUSB_POWER_SUSPENDM) { | |
130 | power &= ~MUSB_POWER_SUSPENDM; | |
131 | power |= MUSB_POWER_RESUME; | |
132 | musb_writeb(mbase, MUSB_POWER, power); | |
133 | ||
5c8a86e1 | 134 | dev_dbg(musb->controller, "Root port resuming, power %02x\n", power); |
550a7375 FB |
135 | |
136 | /* later, GetPortStatus will stop RESUME signaling */ | |
137 | musb->port1_status |= MUSB_PORT_STAT_RESUME; | |
f2dece44 DM |
138 | schedule_delayed_work(&musb->finish_resume_work, |
139 | msecs_to_jiffies(20)); | |
550a7375 FB |
140 | } |
141 | } | |
142 | ||
869c5978 | 143 | void musb_port_reset(struct musb *musb, bool do_reset) |
550a7375 FB |
144 | { |
145 | u8 power; | |
146 | void __iomem *mbase = musb->mregs; | |
147 | ||
e47d9254 | 148 | if (musb->xceiv->otg->state == OTG_STATE_B_IDLE) { |
5c8a86e1 | 149 | dev_dbg(musb->controller, "HNP: Returning from HNP; no hub reset from b_idle\n"); |
550a7375 FB |
150 | musb->port1_status &= ~USB_PORT_STAT_RESET; |
151 | return; | |
152 | } | |
550a7375 FB |
153 | |
154 | if (!is_host_active(musb)) | |
155 | return; | |
156 | ||
157 | /* NOTE: caller guarantees it will turn off the reset when | |
158 | * the appropriate amount of time has passed | |
159 | */ | |
160 | power = musb_readb(mbase, MUSB_POWER); | |
161 | if (do_reset) { | |
550a7375 FB |
162 | /* |
163 | * If RESUME is set, we must make sure it stays minimum 20 ms. | |
164 | * Then we must clear RESUME and wait a bit to let musb start | |
165 | * generating SOFs. If we don't do this, OPT HS A 6.8 tests | |
166 | * fail with "Error! Did not receive an SOF before suspend | |
167 | * detected". | |
168 | */ | |
169 | if (power & MUSB_POWER_RESUME) { | |
73926db3 DM |
170 | long remain = (unsigned long) musb->rh_timer - jiffies; |
171 | ||
172 | if (musb->rh_timer > 0 && remain > 0) { | |
173 | /* take into account the minimum delay after resume */ | |
174 | schedule_delayed_work( | |
f2dece44 | 175 | &musb->deassert_reset_work, remain); |
73926db3 DM |
176 | return; |
177 | } | |
178 | ||
550a7375 | 179 | musb_writeb(mbase, MUSB_POWER, |
73926db3 DM |
180 | power & ~MUSB_POWER_RESUME); |
181 | ||
182 | /* Give the core 1 ms to clear MUSB_POWER_RESUME */ | |
f2dece44 DM |
183 | schedule_delayed_work(&musb->deassert_reset_work, |
184 | msecs_to_jiffies(1)); | |
73926db3 | 185 | return; |
550a7375 FB |
186 | } |
187 | ||
550a7375 FB |
188 | power &= 0xf0; |
189 | musb_writeb(mbase, MUSB_POWER, | |
190 | power | MUSB_POWER_RESET); | |
191 | ||
192 | musb->port1_status |= USB_PORT_STAT_RESET; | |
193 | musb->port1_status &= ~USB_PORT_STAT_ENABLE; | |
f2dece44 DM |
194 | schedule_delayed_work(&musb->deassert_reset_work, |
195 | msecs_to_jiffies(50)); | |
550a7375 | 196 | } else { |
5c8a86e1 | 197 | dev_dbg(musb->controller, "root port reset stopped\n"); |
550a7375 FB |
198 | musb_writeb(mbase, MUSB_POWER, |
199 | power & ~MUSB_POWER_RESET); | |
200 | ||
550a7375 FB |
201 | power = musb_readb(mbase, MUSB_POWER); |
202 | if (power & MUSB_POWER_HSMODE) { | |
5c8a86e1 | 203 | dev_dbg(musb->controller, "high-speed device connected\n"); |
550a7375 FB |
204 | musb->port1_status |= USB_PORT_STAT_HIGH_SPEED; |
205 | } | |
206 | ||
207 | musb->port1_status &= ~USB_PORT_STAT_RESET; | |
208 | musb->port1_status |= USB_PORT_STAT_ENABLE | |
209 | | (USB_PORT_STAT_C_RESET << 16) | |
210 | | (USB_PORT_STAT_C_ENABLE << 16); | |
8b125df5 | 211 | usb_hcd_poll_rh_status(musb->hcd); |
550a7375 FB |
212 | |
213 | musb->vbuserr_retry = VBUSERR_RETRY_COUNT; | |
214 | } | |
215 | } | |
216 | ||
217 | void musb_root_disconnect(struct musb *musb) | |
218 | { | |
d445b6da HK |
219 | struct usb_otg *otg = musb->xceiv->otg; |
220 | ||
749da5f8 AS |
221 | musb->port1_status = USB_PORT_STAT_POWER |
222 | | (USB_PORT_STAT_C_CONNECTION << 16); | |
550a7375 | 223 | |
8b125df5 | 224 | usb_hcd_poll_rh_status(musb->hcd); |
550a7375 FB |
225 | musb->is_active = 0; |
226 | ||
e47d9254 | 227 | switch (musb->xceiv->otg->state) { |
550a7375 | 228 | case OTG_STATE_A_SUSPEND: |
032ec49f | 229 | if (otg->host->b_hnp_enable) { |
e47d9254 | 230 | musb->xceiv->otg->state = OTG_STATE_A_PERIPHERAL; |
1de00dae DB |
231 | musb->g.is_a_peripheral = 1; |
232 | break; | |
233 | } | |
1de00dae DB |
234 | /* FALLTHROUGH */ |
235 | case OTG_STATE_A_HOST: | |
e47d9254 | 236 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON; |
550a7375 FB |
237 | musb->is_active = 0; |
238 | break; | |
239 | case OTG_STATE_A_WAIT_VFALL: | |
e47d9254 | 240 | musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
550a7375 FB |
241 | break; |
242 | default: | |
5c8a86e1 | 243 | dev_dbg(musb->controller, "host disconnect (%s)\n", |
e47d9254 | 244 | usb_otg_state_string(musb->xceiv->otg->state)); |
550a7375 FB |
245 | } |
246 | } | |
247 | ||
248 | ||
249 | /*---------------------------------------------------------------------*/ | |
250 | ||
251 | /* Caller may or may not hold musb->lock */ | |
252 | int musb_hub_status_data(struct usb_hcd *hcd, char *buf) | |
253 | { | |
254 | struct musb *musb = hcd_to_musb(hcd); | |
255 | int retval = 0; | |
256 | ||
257 | /* called in_irq() via usb_hcd_poll_rh_status() */ | |
258 | if (musb->port1_status & 0xffff0000) { | |
259 | *buf = 0x02; | |
260 | retval = 1; | |
261 | } | |
262 | return retval; | |
263 | } | |
264 | ||
ae44df2e SAS |
265 | static int musb_has_gadget(struct musb *musb) |
266 | { | |
267 | /* | |
268 | * In host-only mode we start a connection right away. In OTG mode | |
269 | * we have to wait until we loaded a gadget. We don't really need a | |
270 | * gadget if we operate as a host but we should not start a session | |
271 | * as a device without a gadget or else we explode. | |
272 | */ | |
273 | #ifdef CONFIG_USB_MUSB_HOST | |
274 | return 1; | |
275 | #else | |
276 | if (musb->port_mode == MUSB_PORT_MODE_HOST) | |
277 | return 1; | |
278 | return musb->g.dev.driver != NULL; | |
279 | #endif | |
280 | } | |
281 | ||
550a7375 FB |
282 | int musb_hub_control( |
283 | struct usb_hcd *hcd, | |
284 | u16 typeReq, | |
285 | u16 wValue, | |
286 | u16 wIndex, | |
287 | char *buf, | |
288 | u16 wLength) | |
289 | { | |
290 | struct musb *musb = hcd_to_musb(hcd); | |
291 | u32 temp; | |
292 | int retval = 0; | |
293 | unsigned long flags; | |
294 | ||
295 | spin_lock_irqsave(&musb->lock, flags); | |
296 | ||
541c7d43 | 297 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) { |
550a7375 FB |
298 | spin_unlock_irqrestore(&musb->lock, flags); |
299 | return -ESHUTDOWN; | |
300 | } | |
301 | ||
302 | /* hub features: always zero, setting is a NOP | |
303 | * port features: reported, sometimes updated when host is active | |
304 | * no indicators | |
305 | */ | |
306 | switch (typeReq) { | |
307 | case ClearHubFeature: | |
308 | case SetHubFeature: | |
309 | switch (wValue) { | |
310 | case C_HUB_OVER_CURRENT: | |
311 | case C_HUB_LOCAL_POWER: | |
312 | break; | |
313 | default: | |
314 | goto error; | |
315 | } | |
316 | break; | |
317 | case ClearPortFeature: | |
318 | if ((wIndex & 0xff) != 1) | |
319 | goto error; | |
320 | ||
321 | switch (wValue) { | |
322 | case USB_PORT_FEAT_ENABLE: | |
323 | break; | |
324 | case USB_PORT_FEAT_SUSPEND: | |
325 | musb_port_suspend(musb, false); | |
326 | break; | |
327 | case USB_PORT_FEAT_POWER: | |
032ec49f | 328 | if (!hcd->self.is_b_host) |
743411b3 | 329 | musb_platform_set_vbus(musb, 0); |
550a7375 FB |
330 | break; |
331 | case USB_PORT_FEAT_C_CONNECTION: | |
332 | case USB_PORT_FEAT_C_ENABLE: | |
333 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
334 | case USB_PORT_FEAT_C_RESET: | |
335 | case USB_PORT_FEAT_C_SUSPEND: | |
336 | break; | |
337 | default: | |
338 | goto error; | |
339 | } | |
5c8a86e1 | 340 | dev_dbg(musb->controller, "clear feature %d\n", wValue); |
550a7375 FB |
341 | musb->port1_status &= ~(1 << wValue); |
342 | break; | |
343 | case GetHubDescriptor: | |
344 | { | |
345 | struct usb_hub_descriptor *desc = (void *)buf; | |
346 | ||
347 | desc->bDescLength = 9; | |
348 | desc->bDescriptorType = 0x29; | |
349 | desc->bNbrPorts = 1; | |
551509d2 | 350 | desc->wHubCharacteristics = cpu_to_le16( |
550a7375 FB |
351 | 0x0001 /* per-port power switching */ |
352 | | 0x0010 /* no overcurrent reporting */ | |
353 | ); | |
354 | desc->bPwrOn2PwrGood = 5; /* msec/2 */ | |
355 | desc->bHubContrCurrent = 0; | |
356 | ||
357 | /* workaround bogus struct definition */ | |
dbe79bbe JY |
358 | desc->u.hs.DeviceRemovable[0] = 0x02; /* port 1 */ |
359 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
550a7375 FB |
360 | } |
361 | break; | |
362 | case GetHubStatus: | |
363 | temp = 0; | |
364 | *(__le32 *) buf = cpu_to_le32(temp); | |
365 | break; | |
366 | case GetPortStatus: | |
367 | if (wIndex != 1) | |
368 | goto error; | |
369 | ||
550a7375 FB |
370 | put_unaligned(cpu_to_le32(musb->port1_status |
371 | & ~MUSB_PORT_STAT_RESUME), | |
372 | (__le32 *) buf); | |
373 | ||
374 | /* port change status is more interesting */ | |
5c8a86e1 | 375 | dev_dbg(musb->controller, "port status %08x\n", |
550a7375 FB |
376 | musb->port1_status); |
377 | break; | |
378 | case SetPortFeature: | |
379 | if ((wIndex & 0xff) != 1) | |
380 | goto error; | |
381 | ||
382 | switch (wValue) { | |
383 | case USB_PORT_FEAT_POWER: | |
384 | /* NOTE: this controller has a strange state machine | |
385 | * that involves "requesting sessions" according to | |
386 | * magic side effects from incompletely-described | |
387 | * rules about startup... | |
388 | * | |
389 | * This call is what really starts the host mode; be | |
390 | * very careful about side effects if you reorder any | |
391 | * initialization logic, e.g. for OTG, or change any | |
392 | * logic relating to VBUS power-up. | |
393 | */ | |
ae44df2e | 394 | if (!hcd->self.is_b_host && musb_has_gadget(musb)) |
550a7375 FB |
395 | musb_start(musb); |
396 | break; | |
397 | case USB_PORT_FEAT_RESET: | |
398 | musb_port_reset(musb, true); | |
399 | break; | |
400 | case USB_PORT_FEAT_SUSPEND: | |
401 | musb_port_suspend(musb, true); | |
402 | break; | |
403 | case USB_PORT_FEAT_TEST: | |
404 | if (unlikely(is_host_active(musb))) | |
405 | goto error; | |
406 | ||
407 | wIndex >>= 8; | |
408 | switch (wIndex) { | |
409 | case 1: | |
410 | pr_debug("TEST_J\n"); | |
411 | temp = MUSB_TEST_J; | |
412 | break; | |
413 | case 2: | |
414 | pr_debug("TEST_K\n"); | |
415 | temp = MUSB_TEST_K; | |
416 | break; | |
417 | case 3: | |
418 | pr_debug("TEST_SE0_NAK\n"); | |
419 | temp = MUSB_TEST_SE0_NAK; | |
420 | break; | |
421 | case 4: | |
422 | pr_debug("TEST_PACKET\n"); | |
423 | temp = MUSB_TEST_PACKET; | |
424 | musb_load_testpacket(musb); | |
425 | break; | |
426 | case 5: | |
427 | pr_debug("TEST_FORCE_ENABLE\n"); | |
428 | temp = MUSB_TEST_FORCE_HOST | |
429 | | MUSB_TEST_FORCE_HS; | |
430 | ||
431 | musb_writeb(musb->mregs, MUSB_DEVCTL, | |
432 | MUSB_DEVCTL_SESSION); | |
433 | break; | |
434 | case 6: | |
435 | pr_debug("TEST_FIFO_ACCESS\n"); | |
436 | temp = MUSB_TEST_FIFO_ACCESS; | |
437 | break; | |
438 | default: | |
439 | goto error; | |
440 | } | |
441 | musb_writeb(musb->mregs, MUSB_TESTMODE, temp); | |
442 | break; | |
443 | default: | |
444 | goto error; | |
445 | } | |
5c8a86e1 | 446 | dev_dbg(musb->controller, "set feature %d\n", wValue); |
550a7375 FB |
447 | musb->port1_status |= 1 << wValue; |
448 | break; | |
449 | ||
450 | default: | |
451 | error: | |
452 | /* "protocol stall" on error */ | |
453 | retval = -EPIPE; | |
454 | } | |
455 | spin_unlock_irqrestore(&musb->lock, flags); | |
456 | return retval; | |
457 | } |