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[openwrt/openwrt.git] / target / linux / adm5120 / files / drivers / usb / host / adm5120-hub.c
1 /*
2 * ADM5120 HCD (Host Controller Driver) for USB
3 *
4 * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
5 *
6 * This file was derived from: drivers/usb/host/ohci-hub.c
7 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
8 * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
9 *
10 * This file is licenced under the GPL.
11 */
12
13 /*-------------------------------------------------------------------------*/
14
15 /*
16 * ADM5120 Root Hub ... the nonsharable stuff
17 */
18
19 #define dbg_port(hc,label,num,value) \
20 admhc_dbg(hc, \
21 "%s port%d " \
22 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
23 label, num, value, \
24 (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
25 (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
26 (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
27 (value & ADMHC_PS_PESC) ? " PESC" : "", \
28 (value & ADMHC_PS_CSC) ? " CSC" : "", \
29 \
30 (value & ADMHC_PS_LSDA) ? " LSDA" : "", \
31 (value & ADMHC_PS_PPS) ? " PPS" : "", \
32 (value & ADMHC_PS_PRS) ? " PRS" : "", \
33 (value & ADMHC_PS_POCI) ? " POCI" : "", \
34 (value & ADMHC_PS_PSS) ? " PSS" : "", \
35 \
36 (value & ADMHC_PS_PES) ? " PES" : "", \
37 (value & ADMHC_PS_CCS) ? " CCS" : "" \
38 );
39
40 #define dbg_port_write(hc,label,num,value) \
41 admhc_dbg(hc, \
42 "%s port%d " \
43 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
44 label, num, value, \
45 (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
46 (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
47 (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
48 (value & ADMHC_PS_PESC) ? " PESC" : "", \
49 (value & ADMHC_PS_CSC) ? " CSC" : "", \
50 \
51 (value & ADMHC_PS_CPP) ? " CPP" : "", \
52 (value & ADMHC_PS_SPP) ? " SPP" : "", \
53 (value & ADMHC_PS_SPR) ? " SPR" : "", \
54 (value & ADMHC_PS_CPS) ? " CPS" : "", \
55 (value & ADMHC_PS_SPS) ? " SPS" : "", \
56 \
57 (value & ADMHC_PS_SPE) ? " SPE" : "", \
58 (value & ADMHC_PS_CPE) ? " CPE" : "" \
59 );
60
61 /*-------------------------------------------------------------------------*/
62
63 /* hcd->hub_irq_enable() */
64 static void admhc_hub_irq_enable(struct usb_hcd *hcd)
65 {
66 struct admhcd *ahcd = hcd_to_admhcd(hcd);
67
68 spin_lock_irq(&ahcd->lock);
69 if (!ahcd->autostop)
70 del_timer(&hcd->rh_timer); /* Prevent next poll */
71 admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
72 spin_unlock_irq(&ahcd->lock);
73 }
74
75 /*-------------------------------------------------------------------------*/
76
77 /* build "status change" packet (one or two bytes) from HC registers */
78
79 static int
80 admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
81 {
82 struct admhcd *ahcd = hcd_to_admhcd(hcd);
83 int i, changed = 0, length = 1;
84 int any_connected = 0;
85 unsigned long flags;
86 u32 status;
87
88 spin_lock_irqsave(&ahcd->lock, flags);
89 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
90 goto done;
91
92 /* init status */
93 status = admhc_read_rhdesc(ahcd);
94 if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
95 buf [0] = changed = 1;
96 else
97 buf [0] = 0;
98 if (ahcd->num_ports > 7) {
99 buf [1] = 0;
100 length++;
101 }
102
103 /* look at each port */
104 for (i = 0; i < ahcd->num_ports; i++) {
105 status = admhc_read_portstatus(ahcd, i);
106
107 /* can't autostop if ports are connected */
108 any_connected |= (status & ADMHC_PS_CCS);
109
110 if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
111 | ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
112 changed = 1;
113 if (i < 7)
114 buf [0] |= 1 << (i + 1);
115 else
116 buf [1] |= 1 << (i - 7);
117 }
118 }
119
120 hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed,
121 any_connected);
122
123 done:
124 spin_unlock_irqrestore(&ahcd->lock, flags);
125
126 return changed ? length : 0;
127 }
128
129 /*-------------------------------------------------------------------------*/
130
131 static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
132 {
133 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
134 u32 rh = admhc_read_rhdesc(ahcd);
135 u16 temp;
136
137 desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
138 desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
139 desc->bHubContrCurrent = 0x00; /* 0mA */
140
141 desc->bNbrPorts = ahcd->num_ports;
142 temp = 1 + (ahcd->num_ports / 8);
143 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
144
145 /* FIXME */
146 temp = 0;
147 if (rh & ADMHC_RH_NPS) /* no power switching? */
148 temp |= 0x0002;
149 if (rh & ADMHC_RH_PSM) /* per-port power switching? */
150 temp |= 0x0001;
151 if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
152 temp |= 0x0010;
153 else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
154 temp |= 0x0008;
155 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
156
157 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
158 desc->bitmap[0] = 0;
159 desc->bitmap[0] = ~0;
160
161 return 0;
162 }
163
164 static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
165 {
166 struct usb_hub_status *hs = (struct usb_hub_status *)buf;
167 u32 t = admhc_read_rhdesc(ahcd);
168 u16 status, change;
169
170 status = 0;
171 status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
172 status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
173
174 change = 0;
175 change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
176 change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
177
178 hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
179 hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
180
181 return 0;
182 }
183
184 static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
185 {
186 struct usb_port_status *ps = (struct usb_port_status *)buf;
187 u32 t = admhc_read_portstatus(ahcd, port);
188 u16 status, change;
189
190 status = 0;
191 status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
192 status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
193 status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
194 status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
195 status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
196 status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
197 status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
198
199 change = 0;
200 change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
201 change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
202 change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
203 change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
204 change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
205
206 ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
207 ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
208
209 return 0;
210 }
211
212 /*-------------------------------------------------------------------------*/
213
214 #ifdef CONFIG_USB_OTG
215
216 static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
217 {
218 struct admhcd *ahcd = hcd_to_admhcd(hcd);
219 u32 status;
220
221 if (!port)
222 return -EINVAL;
223 port--;
224
225 /* start port reset before HNP protocol times out */
226 status = admhc_read_portstatus(ahcd, port);
227 if (!(status & ADMHC_PS_CCS))
228 return -ENODEV;
229
230 /* khubd will finish the reset later */
231 admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
232 return 0;
233 }
234
235 static void start_hnp(struct admhcd *ahcd);
236
237 #else
238
239 #define admhc_start_port_reset NULL
240
241 #endif
242
243 /*-------------------------------------------------------------------------*/
244
245
246 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
247 * not necessarily continuous ... to guard against resume signaling.
248 * The short timeout is safe for non-root hubs, and is backward-compatible
249 * with earlier Linux hosts.
250 */
251 #ifdef CONFIG_USB_SUSPEND
252 #define PORT_RESET_MSEC 50
253 #else
254 #define PORT_RESET_MSEC 10
255 #endif
256
257 /* this timer value might be vendor-specific ... */
258 #define PORT_RESET_HW_MSEC 10
259
260 /* wrap-aware logic morphed from <linux/jiffies.h> */
261 #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
262
263 /* called from some task, normally khubd */
264 static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
265 {
266 u32 t;
267
268 admhc_vdbg(ahcd, "reset port%d\n", port);
269 t = admhc_read_portstatus(ahcd, port);
270 if (!(t & ADMHC_PS_CCS))
271 return -ENODEV;
272
273 admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
274 mdelay(10);
275 admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
276 mdelay(100);
277
278 return 0;
279 }
280
281 static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
282 {
283 u32 t;
284
285 admhc_vdbg(ahcd, "enable port%d\n", port);
286 t = admhc_read_portstatus(ahcd, port);
287 if (!(t & ADMHC_PS_CCS))
288 return -ENODEV;
289
290 admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
291
292 return 0;
293 }
294
295 static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
296 {
297 u32 t;
298
299 admhc_vdbg(ahcd, "disable port%d\n", port);
300 t = admhc_read_portstatus(ahcd, port);
301 if (!(t & ADMHC_PS_CCS))
302 return -ENODEV;
303
304 admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
305
306 return 0;
307 }
308
309 static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
310 u32 val)
311 {
312 #ifdef ADMHC_VERBOSE_DEBUG
313 dbg_port_write(ahcd, "write", port, val);
314 #endif
315 admhc_write_portstatus(ahcd, port, val);
316
317 return 0;
318 }
319
320 static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
321 u16 wIndex, char *buf, u16 wLength)
322 {
323 struct admhcd *ahcd = hcd_to_admhcd(hcd);
324 int ports = hcd_to_bus(hcd)->root_hub->maxchild;
325 int ret = 0;
326
327 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
328 return -ESHUTDOWN;
329
330 switch (typeReq) {
331 case ClearHubFeature:
332 switch (wValue) {
333 case C_HUB_OVER_CURRENT:
334 #if 0 /* FIXME */
335 admhc_writel(ahcd, ADMHC_RH_OCIC,
336 &ahcd->regs->roothub.status);
337 #endif
338 case C_HUB_LOCAL_POWER:
339 break;
340 default:
341 goto error;
342 }
343 break;
344 case ClearPortFeature:
345 if (!wIndex || wIndex > ports)
346 goto error;
347 wIndex--;
348
349 switch (wValue) {
350 case USB_PORT_FEAT_ENABLE:
351 ret = admhc_port_disable(ahcd, wIndex);
352 break;
353 case USB_PORT_FEAT_SUSPEND:
354 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
355 break;
356 case USB_PORT_FEAT_POWER:
357 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
358 break;
359 case USB_PORT_FEAT_C_CONNECTION:
360 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
361 break;
362 case USB_PORT_FEAT_C_ENABLE:
363 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
364 break;
365 case USB_PORT_FEAT_C_SUSPEND:
366 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
367 break;
368 case USB_PORT_FEAT_C_OVER_CURRENT:
369 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
370 break;
371 case USB_PORT_FEAT_C_RESET:
372 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
373 break;
374 default:
375 goto error;
376 }
377 break;
378 case GetHubDescriptor:
379 ret = admhc_get_hub_descriptor(ahcd, buf);
380 break;
381 case GetHubStatus:
382 ret = admhc_get_hub_status(ahcd, buf);
383 break;
384 case GetPortStatus:
385 if (!wIndex || wIndex > ports)
386 goto error;
387 wIndex--;
388
389 ret = admhc_get_port_status(ahcd, wIndex, buf);
390 break;
391 case SetHubFeature:
392 switch (wValue) {
393 case C_HUB_OVER_CURRENT:
394 /* FIXME: this can be cleared, yes? */
395 case C_HUB_LOCAL_POWER:
396 break;
397 default:
398 goto error;
399 }
400 break;
401 case SetPortFeature:
402 if (!wIndex || wIndex > ports)
403 goto error;
404 wIndex--;
405
406 switch (wValue) {
407 case USB_PORT_FEAT_ENABLE:
408 ret = admhc_port_enable(ahcd, wIndex);
409 break;
410 case USB_PORT_FEAT_RESET:
411 ret = admhc_port_reset(ahcd, wIndex);
412 break;
413 case USB_PORT_FEAT_SUSPEND:
414 #ifdef CONFIG_USB_OTG
415 if (hcd->self.otg_port == (wIndex + 1)
416 && hcd->self.b_hnp_enable)
417 start_hnp(ahcd);
418 else
419 #endif
420 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
421 break;
422 case USB_PORT_FEAT_POWER:
423 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
424 break;
425 default:
426 goto error;
427 }
428 break;
429
430 default:
431 error:
432 /* "protocol stall" on error */
433 ret = -EPIPE;
434 }
435
436 return ret;
437 }
438
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