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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>
38#include <linux/errno.h>
39#include <linux/init.h>
40#include <linux/time.h>
41#include <linux/timer.h>
42
43#include <asm/unaligned.h>
44
45#include "musb_core.h"
46
47
48static void musb_port_suspend(struct musb *musb, bool do_suspend)
49{
50 u8 power;
51 void __iomem *mbase = musb->mregs;
52
53 if (!is_host_active(musb))
54 return;
55
56 /* NOTE: this doesn't necessarily put PHY into low power mode,
57 * turning off its clock; that's a function of PHY integration and
58 * MUSB_POWER_ENSUSPEND. PHY may need a clock (sigh) to detect
59 * SE0 changing to connect (J) or wakeup (K) states.
60 */
61 power = musb_readb(mbase, MUSB_POWER);
62 if (do_suspend) {
63 int retries = 10000;
64
65 power &= ~MUSB_POWER_RESUME;
66 power |= MUSB_POWER_SUSPENDM;
67 musb_writeb(mbase, MUSB_POWER, power);
68
69 /* Needed for OPT A tests */
70 power = musb_readb(mbase, MUSB_POWER);
71 while (power & MUSB_POWER_SUSPENDM) {
72 power = musb_readb(mbase, MUSB_POWER);
73 if (retries-- < 1)
74 break;
75 }
76
77 dev_dbg(musb->controller, "Root port suspended, power %02x\n", power);
78
79 musb->port1_status |= USB_PORT_STAT_SUSPEND;
80 switch (musb->xceiv->state) {
81 case OTG_STATE_A_HOST:
82 musb->xceiv->state = OTG_STATE_A_SUSPEND;
83 musb->is_active = is_otg_enabled(musb)
84 && musb->xceiv->host->b_hnp_enable;
85 if (musb->is_active)
86 mod_timer(&musb->otg_timer, jiffies
87 + msecs_to_jiffies(
88 OTG_TIME_A_AIDL_BDIS));
89 musb_platform_try_idle(musb, 0);
90 break;
91 case OTG_STATE_B_HOST:
92 musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
93 musb->is_active = is_otg_enabled(musb)
94 && musb->xceiv->host->b_hnp_enable;
95 musb_platform_try_idle(musb, 0);
96 break;
97 default:
98 dev_dbg(musb->controller, "bogus rh suspend? %s\n",
99 otg_state_string(musb->xceiv->state));
100 }
101 } else if (power & MUSB_POWER_SUSPENDM) {
102 power &= ~MUSB_POWER_SUSPENDM;
103 power |= MUSB_POWER_RESUME;
104 musb_writeb(mbase, MUSB_POWER, power);
105
106 dev_dbg(musb->controller, "Root port resuming, power %02x\n", power);
107
108 /* later, GetPortStatus will stop RESUME signaling */
109 musb->port1_status |= MUSB_PORT_STAT_RESUME;
110 musb->rh_timer = jiffies + msecs_to_jiffies(20);
111 }
112}
113
114static void musb_port_reset(struct musb *musb, bool do_reset)
115{
116 u8 power;
117 void __iomem *mbase = musb->mregs;
118
119 if (musb->xceiv->state == OTG_STATE_B_IDLE) {
120 dev_dbg(musb->controller, "HNP: Returning from HNP; no hub reset from b_idle\n");
121 musb->port1_status &= ~USB_PORT_STAT_RESET;
122 return;
123 }
124
125 if (!is_host_active(musb))
126 return;
127
128 /* NOTE: caller guarantees it will turn off the reset when
129 * the appropriate amount of time has passed
130 */
131 power = musb_readb(mbase, MUSB_POWER);
132 if (do_reset) {
133
134 /*
135 * If RESUME is set, we must make sure it stays minimum 20 ms.
136 * Then we must clear RESUME and wait a bit to let musb start
137 * generating SOFs. If we don't do this, OPT HS A 6.8 tests
138 * fail with "Error! Did not receive an SOF before suspend
139 * detected".
140 */
141 if (power & MUSB_POWER_RESUME) {
142 while (time_before(jiffies, musb->rh_timer))
143 msleep(1);
144 musb_writeb(mbase, MUSB_POWER,
145 power & ~MUSB_POWER_RESUME);
146 msleep(1);
147 }
148
149 musb->ignore_disconnect = true;
150 power &= 0xf0;
151 musb_writeb(mbase, MUSB_POWER,
152 power | MUSB_POWER_RESET);
153
154 musb->port1_status |= USB_PORT_STAT_RESET;
155 musb->port1_status &= ~USB_PORT_STAT_ENABLE;
156 musb->rh_timer = jiffies + msecs_to_jiffies(50);
157 } else {
158 dev_dbg(musb->controller, "root port reset stopped\n");
159 musb_writeb(mbase, MUSB_POWER,
160 power & ~MUSB_POWER_RESET);
161
162 musb->ignore_disconnect = false;
163
164 power = musb_readb(mbase, MUSB_POWER);
165 if (power & MUSB_POWER_HSMODE) {
166 dev_dbg(musb->controller, "high-speed device connected\n");
167 musb->port1_status |= USB_PORT_STAT_HIGH_SPEED;
168 }
169
170 musb->port1_status &= ~USB_PORT_STAT_RESET;
171 musb->port1_status |= USB_PORT_STAT_ENABLE
172 | (USB_PORT_STAT_C_RESET << 16)
173 | (USB_PORT_STAT_C_ENABLE << 16);
174 usb_hcd_poll_rh_status(musb_to_hcd(musb));
175
176 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
177 }
178}
179
180void musb_root_disconnect(struct musb *musb)
181{
182 musb->port1_status = USB_PORT_STAT_POWER
183 | (USB_PORT_STAT_C_CONNECTION << 16);
184
185 usb_hcd_poll_rh_status(musb_to_hcd(musb));
186 musb->is_active = 0;
187
188 switch (musb->xceiv->state) {
189 case OTG_STATE_A_SUSPEND:
190 if (is_otg_enabled(musb)
191 && musb->xceiv->host->b_hnp_enable) {
192 musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
193 musb->g.is_a_peripheral = 1;
194 break;
195 }
196 /* FALLTHROUGH */
197 case OTG_STATE_A_HOST:
198 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
199 musb->is_active = 0;
200 break;
201 case OTG_STATE_A_WAIT_VFALL:
202 musb->xceiv->state = OTG_STATE_B_IDLE;
203 break;
204 default:
205 dev_dbg(musb->controller, "host disconnect (%s)\n",
206 otg_state_string(musb->xceiv->state));
207 }
208}
209
210
211/*---------------------------------------------------------------------*/
212
213/* Caller may or may not hold musb->lock */
214int musb_hub_status_data(struct usb_hcd *hcd, char *buf)
215{
216 struct musb *musb = hcd_to_musb(hcd);
217 int retval = 0;
218
219 /* called in_irq() via usb_hcd_poll_rh_status() */
220 if (musb->port1_status & 0xffff0000) {
221 *buf = 0x02;
222 retval = 1;
223 }
224 return retval;
225}
226
227int musb_hub_control(
228 struct usb_hcd *hcd,
229 u16 typeReq,
230 u16 wValue,
231 u16 wIndex,
232 char *buf,
233 u16 wLength)
234{
235 struct musb *musb = hcd_to_musb(hcd);
236 u32 temp;
237 int retval = 0;
238 unsigned long flags;
239
240 spin_lock_irqsave(&musb->lock, flags);
241
242 if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) {
243 spin_unlock_irqrestore(&musb->lock, flags);
244 return -ESHUTDOWN;
245 }
246
247 /* hub features: always zero, setting is a NOP
248 * port features: reported, sometimes updated when host is active
249 * no indicators
250 */
251 switch (typeReq) {
252 case ClearHubFeature:
253 case SetHubFeature:
254 switch (wValue) {
255 case C_HUB_OVER_CURRENT:
256 case C_HUB_LOCAL_POWER:
257 break;
258 default:
259 goto error;
260 }
261 break;
262 case ClearPortFeature:
263 if ((wIndex & 0xff) != 1)
264 goto error;
265
266 switch (wValue) {
267 case USB_PORT_FEAT_ENABLE:
268 break;
269 case USB_PORT_FEAT_SUSPEND:
270 musb_port_suspend(musb, false);
271 break;
272 case USB_PORT_FEAT_POWER:
273 if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
274 musb_platform_set_vbus(musb, 0);
275 break;
276 case USB_PORT_FEAT_C_CONNECTION:
277 case USB_PORT_FEAT_C_ENABLE:
278 case USB_PORT_FEAT_C_OVER_CURRENT:
279 case USB_PORT_FEAT_C_RESET:
280 case USB_PORT_FEAT_C_SUSPEND:
281 break;
282 default:
283 goto error;
284 }
285 dev_dbg(musb->controller, "clear feature %d\n", wValue);
286 musb->port1_status &= ~(1 << wValue);
287 break;
288 case GetHubDescriptor:
289 {
290 struct usb_hub_descriptor *desc = (void *)buf;
291
292 desc->bDescLength = 9;
293 desc->bDescriptorType = 0x29;
294 desc->bNbrPorts = 1;
295 desc->wHubCharacteristics = cpu_to_le16(
296 0x0001 /* per-port power switching */
297 | 0x0010 /* no overcurrent reporting */
298 );
299 desc->bPwrOn2PwrGood = 5; /* msec/2 */
300 desc->bHubContrCurrent = 0;
301
302 /* workaround bogus struct definition */
303 desc->u.hs.DeviceRemovable[0] = 0x02; /* port 1 */
304 desc->u.hs.DeviceRemovable[1] = 0xff;
305 }
306 break;
307 case GetHubStatus:
308 temp = 0;
309 *(__le32 *) buf = cpu_to_le32(temp);
310 break;
311 case GetPortStatus:
312 if (wIndex != 1)
313 goto error;
314
315 /* finish RESET signaling? */
316 if ((musb->port1_status & USB_PORT_STAT_RESET)
317 && time_after_eq(jiffies, musb->rh_timer))
318 musb_port_reset(musb, false);
319
320 /* finish RESUME signaling? */
321 if ((musb->port1_status & MUSB_PORT_STAT_RESUME)
322 && time_after_eq(jiffies, musb->rh_timer)) {
323 u8 power;
324
325 power = musb_readb(musb->mregs, MUSB_POWER);
326 power &= ~MUSB_POWER_RESUME;
327 dev_dbg(musb->controller, "root port resume stopped, power %02x\n",
328 power);
329 musb_writeb(musb->mregs, MUSB_POWER, power);
330
331 /* ISSUE: DaVinci (RTL 1.300) disconnects after
332 * resume of high speed peripherals (but not full
333 * speed ones).
334 */
335
336 musb->is_active = 1;
337 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
338 | MUSB_PORT_STAT_RESUME);
339 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
340 usb_hcd_poll_rh_status(musb_to_hcd(musb));
341 /* NOTE: it might really be A_WAIT_BCON ... */
342 musb->xceiv->state = OTG_STATE_A_HOST;
343 }
344
345 put_unaligned(cpu_to_le32(musb->port1_status
346 & ~MUSB_PORT_STAT_RESUME),
347 (__le32 *) buf);
348
349 /* port change status is more interesting */
350 dev_dbg(musb->controller, "port status %08x\n",
351 musb->port1_status);
352 break;
353 case SetPortFeature:
354 if ((wIndex & 0xff) != 1)
355 goto error;
356
357 switch (wValue) {
358 case USB_PORT_FEAT_POWER:
359 /* NOTE: this controller has a strange state machine
360 * that involves "requesting sessions" according to
361 * magic side effects from incompletely-described
362 * rules about startup...
363 *
364 * This call is what really starts the host mode; be
365 * very careful about side effects if you reorder any
366 * initialization logic, e.g. for OTG, or change any
367 * logic relating to VBUS power-up.
368 */
369 if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
370 musb_start(musb);
371 break;
372 case USB_PORT_FEAT_RESET:
373 musb_port_reset(musb, true);
374 break;
375 case USB_PORT_FEAT_SUSPEND:
376 musb_port_suspend(musb, true);
377 break;
378 case USB_PORT_FEAT_TEST:
379 if (unlikely(is_host_active(musb)))
380 goto error;
381
382 wIndex >>= 8;
383 switch (wIndex) {
384 case 1:
385 pr_debug("TEST_J\n");
386 temp = MUSB_TEST_J;
387 break;
388 case 2:
389 pr_debug("TEST_K\n");
390 temp = MUSB_TEST_K;
391 break;
392 case 3:
393 pr_debug("TEST_SE0_NAK\n");
394 temp = MUSB_TEST_SE0_NAK;
395 break;
396 case 4:
397 pr_debug("TEST_PACKET\n");
398 temp = MUSB_TEST_PACKET;
399 musb_load_testpacket(musb);
400 break;
401 case 5:
402 pr_debug("TEST_FORCE_ENABLE\n");
403 temp = MUSB_TEST_FORCE_HOST
404 | MUSB_TEST_FORCE_HS;
405
406 musb_writeb(musb->mregs, MUSB_DEVCTL,
407 MUSB_DEVCTL_SESSION);
408 break;
409 case 6:
410 pr_debug("TEST_FIFO_ACCESS\n");
411 temp = MUSB_TEST_FIFO_ACCESS;
412 break;
413 default:
414 goto error;
415 }
416 musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
417 break;
418 default:
419 goto error;
420 }
421 dev_dbg(musb->controller, "set feature %d\n", wValue);
422 musb->port1_status |= 1 << wValue;
423 break;
424
425 default:
426error:
427 /* "protocol stall" on error */
428 retval = -EPIPE;
429 }
430 spin_unlock_irqrestore(&musb->lock, flags);
431 return retval;
432}
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>
38#include <linux/errno.h>
39#include <linux/time.h>
40#include <linux/timer.h>
41
42#include <asm/unaligned.h>
43
44#include "musb_core.h"
45
46void musb_host_finish_resume(struct work_struct *work)
47{
48 struct musb *musb;
49 unsigned long flags;
50 u8 power;
51
52 musb = container_of(work, struct musb, finish_resume_work.work);
53
54 spin_lock_irqsave(&musb->lock, flags);
55
56 power = musb_readb(musb->mregs, MUSB_POWER);
57 power &= ~MUSB_POWER_RESUME;
58 musb_dbg(musb, "root port resume stopped, power %02x", power);
59 musb_writeb(musb->mregs, MUSB_POWER, power);
60
61 /*
62 * ISSUE: DaVinci (RTL 1.300) disconnects after
63 * resume of high speed peripherals (but not full
64 * speed ones).
65 */
66 musb->is_active = 1;
67 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND | MUSB_PORT_STAT_RESUME);
68 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
69 usb_hcd_poll_rh_status(musb->hcd);
70 /* NOTE: it might really be A_WAIT_BCON ... */
71 musb->xceiv->otg->state = OTG_STATE_A_HOST;
72
73 spin_unlock_irqrestore(&musb->lock, flags);
74}
75
76void musb_port_suspend(struct musb *musb, bool do_suspend)
77{
78 struct usb_otg *otg = musb->xceiv->otg;
79 u8 power;
80 void __iomem *mbase = musb->mregs;
81
82 if (!is_host_active(musb))
83 return;
84
85 /* NOTE: this doesn't necessarily put PHY into low power mode,
86 * turning off its clock; that's a function of PHY integration and
87 * MUSB_POWER_ENSUSPEND. PHY may need a clock (sigh) to detect
88 * SE0 changing to connect (J) or wakeup (K) states.
89 */
90 power = musb_readb(mbase, MUSB_POWER);
91 if (do_suspend) {
92 int retries = 10000;
93
94 power &= ~MUSB_POWER_RESUME;
95 power |= MUSB_POWER_SUSPENDM;
96 musb_writeb(mbase, MUSB_POWER, power);
97
98 /* Needed for OPT A tests */
99 power = musb_readb(mbase, MUSB_POWER);
100 while (power & MUSB_POWER_SUSPENDM) {
101 power = musb_readb(mbase, MUSB_POWER);
102 if (retries-- < 1)
103 break;
104 }
105
106 musb_dbg(musb, "Root port suspended, power %02x", power);
107
108 musb->port1_status |= USB_PORT_STAT_SUSPEND;
109 switch (musb->xceiv->otg->state) {
110 case OTG_STATE_A_HOST:
111 musb->xceiv->otg->state = OTG_STATE_A_SUSPEND;
112 musb->is_active = otg->host->b_hnp_enable;
113 if (musb->is_active)
114 mod_timer(&musb->otg_timer, jiffies
115 + msecs_to_jiffies(
116 OTG_TIME_A_AIDL_BDIS));
117 musb_platform_try_idle(musb, 0);
118 break;
119 case OTG_STATE_B_HOST:
120 musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON;
121 musb->is_active = otg->host->b_hnp_enable;
122 musb_platform_try_idle(musb, 0);
123 break;
124 default:
125 musb_dbg(musb, "bogus rh suspend? %s",
126 usb_otg_state_string(musb->xceiv->otg->state));
127 }
128 } else if (power & MUSB_POWER_SUSPENDM) {
129 power &= ~MUSB_POWER_SUSPENDM;
130 power |= MUSB_POWER_RESUME;
131 musb_writeb(mbase, MUSB_POWER, power);
132
133 musb_dbg(musb, "Root port resuming, power %02x", power);
134
135 musb->port1_status |= MUSB_PORT_STAT_RESUME;
136 schedule_delayed_work(&musb->finish_resume_work,
137 msecs_to_jiffies(USB_RESUME_TIMEOUT));
138 }
139}
140
141void musb_port_reset(struct musb *musb, bool do_reset)
142{
143 u8 power;
144 void __iomem *mbase = musb->mregs;
145
146 if (musb->xceiv->otg->state == OTG_STATE_B_IDLE) {
147 musb_dbg(musb, "HNP: Returning from HNP; no hub reset from b_idle");
148 musb->port1_status &= ~USB_PORT_STAT_RESET;
149 return;
150 }
151
152 if (!is_host_active(musb))
153 return;
154
155 /* NOTE: caller guarantees it will turn off the reset when
156 * the appropriate amount of time has passed
157 */
158 power = musb_readb(mbase, MUSB_POWER);
159 if (do_reset) {
160 /*
161 * If RESUME is set, we must make sure it stays minimum 20 ms.
162 * Then we must clear RESUME and wait a bit to let musb start
163 * generating SOFs. If we don't do this, OPT HS A 6.8 tests
164 * fail with "Error! Did not receive an SOF before suspend
165 * detected".
166 */
167 if (power & MUSB_POWER_RESUME) {
168 long remain = (unsigned long) musb->rh_timer - jiffies;
169
170 if (musb->rh_timer > 0 && remain > 0) {
171 /* take into account the minimum delay after resume */
172 schedule_delayed_work(
173 &musb->deassert_reset_work, remain);
174 return;
175 }
176
177 musb_writeb(mbase, MUSB_POWER,
178 power & ~MUSB_POWER_RESUME);
179
180 /* Give the core 1 ms to clear MUSB_POWER_RESUME */
181 schedule_delayed_work(&musb->deassert_reset_work,
182 msecs_to_jiffies(1));
183 return;
184 }
185
186 power &= 0xf0;
187 musb_writeb(mbase, MUSB_POWER,
188 power | MUSB_POWER_RESET);
189
190 musb->port1_status |= USB_PORT_STAT_RESET;
191 musb->port1_status &= ~USB_PORT_STAT_ENABLE;
192 schedule_delayed_work(&musb->deassert_reset_work,
193 msecs_to_jiffies(50));
194 } else {
195 musb_dbg(musb, "root port reset stopped");
196 musb_platform_pre_root_reset_end(musb);
197 musb_writeb(mbase, MUSB_POWER,
198 power & ~MUSB_POWER_RESET);
199 musb_platform_post_root_reset_end(musb);
200
201 power = musb_readb(mbase, MUSB_POWER);
202 if (power & MUSB_POWER_HSMODE) {
203 musb_dbg(musb, "high-speed device connected");
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);
211 usb_hcd_poll_rh_status(musb->hcd);
212
213 musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
214 }
215}
216
217void musb_root_disconnect(struct musb *musb)
218{
219 struct usb_otg *otg = musb->xceiv->otg;
220
221 musb->port1_status = USB_PORT_STAT_POWER
222 | (USB_PORT_STAT_C_CONNECTION << 16);
223
224 usb_hcd_poll_rh_status(musb->hcd);
225 musb->is_active = 0;
226
227 switch (musb->xceiv->otg->state) {
228 case OTG_STATE_A_SUSPEND:
229 if (otg->host->b_hnp_enable) {
230 musb->xceiv->otg->state = OTG_STATE_A_PERIPHERAL;
231 musb->g.is_a_peripheral = 1;
232 break;
233 }
234 /* FALLTHROUGH */
235 case OTG_STATE_A_HOST:
236 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
237 musb->is_active = 0;
238 break;
239 case OTG_STATE_A_WAIT_VFALL:
240 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
241 break;
242 default:
243 musb_dbg(musb, "host disconnect (%s)",
244 usb_otg_state_string(musb->xceiv->otg->state));
245 }
246}
247EXPORT_SYMBOL_GPL(musb_root_disconnect);
248
249
250/*---------------------------------------------------------------------*/
251
252/* Caller may or may not hold musb->lock */
253int musb_hub_status_data(struct usb_hcd *hcd, char *buf)
254{
255 struct musb *musb = hcd_to_musb(hcd);
256 int retval = 0;
257
258 /* called in_irq() via usb_hcd_poll_rh_status() */
259 if (musb->port1_status & 0xffff0000) {
260 *buf = 0x02;
261 retval = 1;
262 }
263 return retval;
264}
265
266static int musb_has_gadget(struct musb *musb)
267{
268 /*
269 * In host-only mode we start a connection right away. In OTG mode
270 * we have to wait until we loaded a gadget. We don't really need a
271 * gadget if we operate as a host but we should not start a session
272 * as a device without a gadget or else we explode.
273 */
274#ifdef CONFIG_USB_MUSB_HOST
275 return 1;
276#else
277 return musb->port_mode == MUSB_PORT_MODE_HOST;
278#endif
279}
280
281int musb_hub_control(
282 struct usb_hcd *hcd,
283 u16 typeReq,
284 u16 wValue,
285 u16 wIndex,
286 char *buf,
287 u16 wLength)
288{
289 struct musb *musb = hcd_to_musb(hcd);
290 u32 temp;
291 int retval = 0;
292 unsigned long flags;
293 bool start_musb = false;
294
295 spin_lock_irqsave(&musb->lock, flags);
296
297 if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) {
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:
328 if (!hcd->self.is_b_host)
329 musb_platform_set_vbus(musb, 0);
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 }
340 musb_dbg(musb, "clear feature %d", wValue);
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 = USB_DT_HUB;
349 desc->bNbrPorts = 1;
350 desc->wHubCharacteristics = cpu_to_le16(
351 HUB_CHAR_INDV_PORT_LPSM /* per-port power switching */
352 | HUB_CHAR_NO_OCPM /* no overcurrent reporting */
353 );
354 desc->bPwrOn2PwrGood = 5; /* msec/2 */
355 desc->bHubContrCurrent = 0;
356
357 /* workaround bogus struct definition */
358 desc->u.hs.DeviceRemovable[0] = 0x02; /* port 1 */
359 desc->u.hs.DeviceRemovable[1] = 0xff;
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
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 */
375 musb_dbg(musb, "port status %08x", musb->port1_status);
376 break;
377 case SetPortFeature:
378 if ((wIndex & 0xff) != 1)
379 goto error;
380
381 switch (wValue) {
382 case USB_PORT_FEAT_POWER:
383 /* NOTE: this controller has a strange state machine
384 * that involves "requesting sessions" according to
385 * magic side effects from incompletely-described
386 * rules about startup...
387 *
388 * This call is what really starts the host mode; be
389 * very careful about side effects if you reorder any
390 * initialization logic, e.g. for OTG, or change any
391 * logic relating to VBUS power-up.
392 */
393 if (!hcd->self.is_b_host && musb_has_gadget(musb))
394 start_musb = true;
395 break;
396 case USB_PORT_FEAT_RESET:
397 musb_port_reset(musb, true);
398 break;
399 case USB_PORT_FEAT_SUSPEND:
400 musb_port_suspend(musb, true);
401 break;
402 case USB_PORT_FEAT_TEST:
403 if (unlikely(is_host_active(musb)))
404 goto error;
405
406 wIndex >>= 8;
407 switch (wIndex) {
408 case 1:
409 pr_debug("TEST_J\n");
410 temp = MUSB_TEST_J;
411 break;
412 case 2:
413 pr_debug("TEST_K\n");
414 temp = MUSB_TEST_K;
415 break;
416 case 3:
417 pr_debug("TEST_SE0_NAK\n");
418 temp = MUSB_TEST_SE0_NAK;
419 break;
420 case 4:
421 pr_debug("TEST_PACKET\n");
422 temp = MUSB_TEST_PACKET;
423 musb_load_testpacket(musb);
424 break;
425 case 5:
426 pr_debug("TEST_FORCE_ENABLE\n");
427 temp = MUSB_TEST_FORCE_HOST
428 | MUSB_TEST_FORCE_HS;
429
430 musb_writeb(musb->mregs, MUSB_DEVCTL,
431 MUSB_DEVCTL_SESSION);
432 break;
433 case 6:
434 pr_debug("TEST_FIFO_ACCESS\n");
435 temp = MUSB_TEST_FIFO_ACCESS;
436 break;
437 default:
438 goto error;
439 }
440 musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
441 break;
442 default:
443 goto error;
444 }
445 musb_dbg(musb, "set feature %d", wValue);
446 musb->port1_status |= 1 << wValue;
447 break;
448
449 default:
450error:
451 /* "protocol stall" on error */
452 retval = -EPIPE;
453 }
454 spin_unlock_irqrestore(&musb->lock, flags);
455
456 if (start_musb)
457 musb_start(musb);
458
459 return retval;
460}