1
2
3
4
5
6
7
8
9
10
11
12
13
14
15static const __u8 root_hub_hub_des[] =
16{
17 0x09,
18 0x29,
19 0x02,
20 0x0a,
21 0x00,
22 0x01,
23 0x00,
24 0x00,
25 0xff
26};
27
28#define UHCI_RH_MAXCHILD 7
29
30
31#define WZ_BITS (USBPORTSC_RES2 | USBPORTSC_RES3 | USBPORTSC_RES4)
32
33
34#define RWC_BITS (USBPORTSC_OCC | USBPORTSC_PEC | USBPORTSC_CSC)
35
36
37#define SUSPEND_BITS (USBPORTSC_SUSP | USBPORTSC_RD)
38
39
40
41
42static int any_ports_active(struct uhci_hcd *uhci)
43{
44 int port;
45
46 for (port = 0; port < uhci->rh_numports; ++port) {
47 if ((uhci_readw(uhci, USBPORTSC1 + port * 2) &
48 (USBPORTSC_CCS | RWC_BITS)) ||
49 test_bit(port, &uhci->port_c_suspend))
50 return 1;
51 }
52 return 0;
53}
54
55static inline int get_hub_status_data(struct uhci_hcd *uhci, char *buf)
56{
57 int port;
58 int mask = RWC_BITS;
59
60
61
62
63
64
65
66 if (ignore_oc)
67 mask &= ~USBPORTSC_OCC;
68
69 *buf = 0;
70 for (port = 0; port < uhci->rh_numports; ++port) {
71 if ((uhci_readw(uhci, USBPORTSC1 + port * 2) & mask) ||
72 test_bit(port, &uhci->port_c_suspend))
73 *buf |= (1 << (port + 1));
74 }
75 return !!*buf;
76}
77
78#define CLR_RH_PORTSTAT(x) \
79 status = uhci_readw(uhci, port_addr); \
80 status &= ~(RWC_BITS|WZ_BITS); \
81 status &= ~(x); \
82 status |= RWC_BITS & (x); \
83 uhci_writew(uhci, status, port_addr)
84
85#define SET_RH_PORTSTAT(x) \
86 status = uhci_readw(uhci, port_addr); \
87 status |= (x); \
88 status &= ~(RWC_BITS|WZ_BITS); \
89 uhci_writew(uhci, status, port_addr)
90
91
92
93
94static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
95 unsigned long port_addr)
96{
97 int status;
98 int i;
99
100 if (uhci_readw(uhci, port_addr) & SUSPEND_BITS) {
101 CLR_RH_PORTSTAT(SUSPEND_BITS);
102 if (test_bit(port, &uhci->resuming_ports))
103 set_bit(port, &uhci->port_c_suspend);
104
105
106
107
108
109
110 for (i = 0; i < 10; ++i) {
111 if (!(uhci_readw(uhci, port_addr) & SUSPEND_BITS))
112 break;
113 udelay(1);
114 }
115 }
116 clear_bit(port, &uhci->resuming_ports);
117 usb_hcd_end_port_resume(&uhci_to_hcd(uhci)->self, port);
118}
119
120
121
122
123static void wait_for_HP(struct uhci_hcd *uhci, unsigned long port_addr)
124{
125 int i;
126
127 for (i = 10; i < 250; i += 10) {
128 if (uhci_readw(uhci, port_addr) & USBPORTSC_CSC)
129 return;
130 udelay(10);
131 }
132
133}
134
135static void uhci_check_ports(struct uhci_hcd *uhci)
136{
137 unsigned int port;
138 unsigned long port_addr;
139 int status;
140
141 for (port = 0; port < uhci->rh_numports; ++port) {
142 port_addr = USBPORTSC1 + 2 * port;
143 status = uhci_readw(uhci, port_addr);
144 if (unlikely(status & USBPORTSC_PR)) {
145 if (time_after_eq(jiffies, uhci->ports_timeout)) {
146 CLR_RH_PORTSTAT(USBPORTSC_PR);
147 udelay(10);
148
149
150
151 if (uhci->wait_for_hp)
152 wait_for_HP(uhci, port_addr);
153
154
155
156
157
158 CLR_RH_PORTSTAT(USBPORTSC_CSC | USBPORTSC_PEC);
159 SET_RH_PORTSTAT(USBPORTSC_PE);
160 }
161 }
162 if (unlikely(status & USBPORTSC_RD)) {
163 if (!test_bit(port, &uhci->resuming_ports)) {
164
165
166 set_bit(port, &uhci->resuming_ports);
167 uhci->ports_timeout = jiffies +
168 msecs_to_jiffies(25);
169 usb_hcd_start_port_resume(
170 &uhci_to_hcd(uhci)->self, port);
171
172
173
174 mod_timer(&uhci_to_hcd(uhci)->rh_timer,
175 uhci->ports_timeout);
176 } else if (time_after_eq(jiffies,
177 uhci->ports_timeout)) {
178 uhci_finish_suspend(uhci, port, port_addr);
179 }
180 }
181 }
182}
183
184static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
185{
186 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
187 unsigned long flags;
188 int status = 0;
189
190 spin_lock_irqsave(&uhci->lock, flags);
191
192 uhci_scan_schedule(uhci);
193 if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
194 goto done;
195 uhci_check_ports(uhci);
196
197 status = get_hub_status_data(uhci, buf);
198
199 switch (uhci->rh_state) {
200 case UHCI_RH_SUSPENDED:
201
202 if (status || uhci->resuming_ports) {
203 status = 1;
204 usb_hcd_resume_root_hub(hcd);
205 }
206 break;
207
208 case UHCI_RH_AUTO_STOPPED:
209
210 if (status)
211 wakeup_rh(uhci);
212 break;
213
214 case UHCI_RH_RUNNING:
215
216 if (!any_ports_active(uhci)) {
217 uhci->rh_state = UHCI_RH_RUNNING_NODEVS;
218 uhci->auto_stop_time = jiffies + HZ;
219 }
220 break;
221
222 case UHCI_RH_RUNNING_NODEVS:
223
224 if (any_ports_active(uhci))
225 uhci->rh_state = UHCI_RH_RUNNING;
226 else if (time_after_eq(jiffies, uhci->auto_stop_time) &&
227 !uhci->wait_for_hp)
228 suspend_rh(uhci, UHCI_RH_AUTO_STOPPED);
229 break;
230
231 default:
232 break;
233 }
234
235done:
236 spin_unlock_irqrestore(&uhci->lock, flags);
237 return status;
238}
239
240
241static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
242 u16 wIndex, char *buf, u16 wLength)
243{
244 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
245 int status, lstatus, retval = 0;
246 unsigned int port = wIndex - 1;
247 unsigned long port_addr = USBPORTSC1 + 2 * port;
248 u16 wPortChange, wPortStatus;
249 unsigned long flags;
250
251 if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
252 return -ETIMEDOUT;
253
254 spin_lock_irqsave(&uhci->lock, flags);
255 switch (typeReq) {
256
257 case GetHubStatus:
258 *(__le32 *)buf = cpu_to_le32(0);
259 retval = 4;
260 break;
261 case GetPortStatus:
262 if (port >= uhci->rh_numports)
263 goto err;
264
265 uhci_check_ports(uhci);
266 status = uhci_readw(uhci, port_addr);
267
268
269
270
271
272 if (uhci->oc_low)
273 status ^= USBPORTSC_OC;
274
275
276 wPortChange = lstatus = 0;
277 if (status & USBPORTSC_CSC)
278 wPortChange |= USB_PORT_STAT_C_CONNECTION;
279 if (status & USBPORTSC_PEC)
280 wPortChange |= USB_PORT_STAT_C_ENABLE;
281 if ((status & USBPORTSC_OCC) && !ignore_oc)
282 wPortChange |= USB_PORT_STAT_C_OVERCURRENT;
283
284 if (test_bit(port, &uhci->port_c_suspend)) {
285 wPortChange |= USB_PORT_STAT_C_SUSPEND;
286 lstatus |= 1;
287 }
288 if (test_bit(port, &uhci->resuming_ports))
289 lstatus |= 4;
290
291
292 wPortStatus = USB_PORT_STAT_POWER;
293 if (status & USBPORTSC_CCS)
294 wPortStatus |= USB_PORT_STAT_CONNECTION;
295 if (status & USBPORTSC_PE) {
296 wPortStatus |= USB_PORT_STAT_ENABLE;
297 if (status & SUSPEND_BITS)
298 wPortStatus |= USB_PORT_STAT_SUSPEND;
299 }
300 if (status & USBPORTSC_OC)
301 wPortStatus |= USB_PORT_STAT_OVERCURRENT;
302 if (status & USBPORTSC_PR)
303 wPortStatus |= USB_PORT_STAT_RESET;
304 if (status & USBPORTSC_LSDA)
305 wPortStatus |= USB_PORT_STAT_LOW_SPEED;
306
307 if (wPortChange)
308 dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
309 wIndex, status, lstatus);
310
311 *(__le16 *)buf = cpu_to_le16(wPortStatus);
312 *(__le16 *)(buf + 2) = cpu_to_le16(wPortChange);
313 retval = 4;
314 break;
315 case SetHubFeature:
316 case ClearHubFeature:
317 switch (wValue) {
318 case C_HUB_OVER_CURRENT:
319 case C_HUB_LOCAL_POWER:
320 break;
321 default:
322 goto err;
323 }
324 break;
325 case SetPortFeature:
326 if (port >= uhci->rh_numports)
327 goto err;
328
329 switch (wValue) {
330 case USB_PORT_FEAT_SUSPEND:
331 SET_RH_PORTSTAT(USBPORTSC_SUSP);
332 break;
333 case USB_PORT_FEAT_RESET:
334 SET_RH_PORTSTAT(USBPORTSC_PR);
335
336
337 uhci_finish_suspend(uhci, port, port_addr);
338
339
340 uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
341 break;
342 case USB_PORT_FEAT_POWER:
343
344 break;
345 default:
346 goto err;
347 }
348 break;
349 case ClearPortFeature:
350 if (port >= uhci->rh_numports)
351 goto err;
352
353 switch (wValue) {
354 case USB_PORT_FEAT_ENABLE:
355 CLR_RH_PORTSTAT(USBPORTSC_PE);
356
357
358 uhci_finish_suspend(uhci, port, port_addr);
359 break;
360 case USB_PORT_FEAT_C_ENABLE:
361 CLR_RH_PORTSTAT(USBPORTSC_PEC);
362 break;
363 case USB_PORT_FEAT_SUSPEND:
364 if (!(uhci_readw(uhci, port_addr) & USBPORTSC_SUSP)) {
365
366
367 uhci_finish_suspend(uhci, port, port_addr);
368 } else if (!test_and_set_bit(port,
369 &uhci->resuming_ports)) {
370 SET_RH_PORTSTAT(USBPORTSC_RD);
371
372
373
374
375
376 if (!(uhci_readw(uhci, port_addr) &
377 USBPORTSC_RD))
378 uhci_finish_suspend(uhci, port,
379 port_addr);
380 else
381
382 uhci->ports_timeout = jiffies +
383 msecs_to_jiffies(20);
384 }
385 break;
386 case USB_PORT_FEAT_C_SUSPEND:
387 clear_bit(port, &uhci->port_c_suspend);
388 break;
389 case USB_PORT_FEAT_POWER:
390
391 goto err;
392 case USB_PORT_FEAT_C_CONNECTION:
393 CLR_RH_PORTSTAT(USBPORTSC_CSC);
394 break;
395 case USB_PORT_FEAT_C_OVER_CURRENT:
396 CLR_RH_PORTSTAT(USBPORTSC_OCC);
397 break;
398 case USB_PORT_FEAT_C_RESET:
399
400 break;
401 default:
402 goto err;
403 }
404 break;
405 case GetHubDescriptor:
406 retval = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
407 memcpy(buf, root_hub_hub_des, retval);
408 if (retval > 2)
409 buf[2] = uhci->rh_numports;
410 break;
411 default:
412err:
413 retval = -EPIPE;
414 }
415 spin_unlock_irqrestore(&uhci->lock, flags);
416
417 return retval;
418}
419