OpenWrt – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 /*
2 * ADM5120 HCD (Host Controller Driver) for USB
3 *
4 * Copyright (C) 2007-2008 Gabor Juhos <juhosg@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 program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
13 *
14 */
15  
16 /*-------------------------------------------------------------------------*/
17  
18 /*
19 * ADM5120 Root Hub ... the nonsharable stuff
20 */
21  
22 #define dbg_port(hc, label, num, value) \
23 admhc_dbg(hc, \
24 "%s port%d " \
25 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
26 label, num, value, \
27 (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
28 (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
29 (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
30 (value & ADMHC_PS_PESC) ? " PESC" : "", \
31 (value & ADMHC_PS_CSC) ? " CSC" : "", \
32 \
33 (value & ADMHC_PS_LSDA) ? " LSDA" : "", \
34 (value & ADMHC_PS_PPS) ? " PPS" : "", \
35 (value & ADMHC_PS_PRS) ? " PRS" : "", \
36 (value & ADMHC_PS_POCI) ? " POCI" : "", \
37 (value & ADMHC_PS_PSS) ? " PSS" : "", \
38 \
39 (value & ADMHC_PS_PES) ? " PES" : "", \
40 (value & ADMHC_PS_CCS) ? " CCS" : "" \
41 );
42  
43 #define dbg_port_write(hc, label, num, value) \
44 admhc_dbg(hc, \
45 "%s port%d " \
46 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
47 label, num, value, \
48 (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
49 (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
50 (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
51 (value & ADMHC_PS_PESC) ? " PESC" : "", \
52 (value & ADMHC_PS_CSC) ? " CSC" : "", \
53 \
54 (value & ADMHC_PS_CPP) ? " CPP" : "", \
55 (value & ADMHC_PS_SPP) ? " SPP" : "", \
56 (value & ADMHC_PS_SPR) ? " SPR" : "", \
57 (value & ADMHC_PS_CPS) ? " CPS" : "", \
58 (value & ADMHC_PS_SPS) ? " SPS" : "", \
59 \
60 (value & ADMHC_PS_SPE) ? " SPE" : "", \
61 (value & ADMHC_PS_CPE) ? " CPE" : "" \
62 );
63  
64 /*-------------------------------------------------------------------------*/
65  
66 /* build "status change" packet (one or two bytes) from HC registers */
67  
68 static int
69 admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
70 {
71 struct admhcd *ahcd = hcd_to_admhcd(hcd);
72 int i, changed = 0, length = 1;
73 int any_connected = 0;
74 unsigned long flags;
75 u32 status;
76  
77 spin_lock_irqsave(&ahcd->lock, flags);
78 if (!HCD_HW_ACCESSIBLE(hcd))
79 goto done;
80  
81 /* init status */
82 status = admhc_read_rhdesc(ahcd);
83 if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
84 buf[0] = changed = 1;
85 else
86 buf[0] = 0;
87 if (ahcd->num_ports > 7) {
88 buf[1] = 0;
89 length++;
90 }
91  
92 /* look at each port */
93 for (i = 0; i < ahcd->num_ports; i++) {
94 status = admhc_read_portstatus(ahcd, i);
95  
96 /* can't autostop if ports are connected */
97 any_connected |= (status & ADMHC_PS_CCS);
98  
99 if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
100 | ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
101 changed = 1;
102 if (i < 7)
103 buf[0] |= 1 << (i + 1);
104 else
105 buf[1] |= 1 << (i - 7);
106 }
107 }
108  
109 if (admhc_root_hub_state_changes(ahcd, changed,
110 any_connected))
111 set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
112 else
113 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
114  
115 done:
116 spin_unlock_irqrestore(&ahcd->lock, flags);
117  
118 return changed ? length : 0;
119 }
120  
121 /*-------------------------------------------------------------------------*/
122  
123 static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
124 {
125 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
126 u32 rh = admhc_read_rhdesc(ahcd);
127 u16 temp;
128  
129 desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
130 desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
131 desc->bHubContrCurrent = 0x00; /* 0mA */
132  
133 desc->bNbrPorts = ahcd->num_ports;
134 temp = 1 + (ahcd->num_ports / 8);
135 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
136  
137 /* FIXME */
138 temp = 0;
139 if (rh & ADMHC_RH_NPS) /* no power switching? */
140 temp |= 0x0002;
141 if (rh & ADMHC_RH_PSM) /* per-port power switching? */
142 temp |= 0x0001;
143 if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
144 temp |= 0x0010;
145 else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
146 temp |= 0x0008;
147 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
148  
149 /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
150 desc->u.hs.DeviceRemovable[0] = 0;
151 desc->u.hs.DeviceRemovable[0] = ~0;
152  
153 return 0;
154 }
155  
156 static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
157 {
158 struct usb_hub_status *hs = (struct usb_hub_status *)buf;
159 u32 t = admhc_read_rhdesc(ahcd);
160 u16 status, change;
161  
162 status = 0;
163 status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
164 status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
165  
166 change = 0;
167 change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
168 change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
169  
170 hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
171 hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
172  
173 return 0;
174 }
175  
176 static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
177 {
178 struct usb_port_status *ps = (struct usb_port_status *)buf;
179 u32 t = admhc_read_portstatus(ahcd, port);
180 u16 status, change;
181  
182 status = 0;
183 status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
184 status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
185 status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
186 status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
187 status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
188 status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
189 status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
190  
191 change = 0;
192 change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
193 change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
194 change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
195 change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
196 change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
197  
198 ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
199 ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
200  
201 return 0;
202 }
203  
204 /*-------------------------------------------------------------------------*/
205  
206 #ifdef CONFIG_USB_OTG
207  
208 static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
209 {
210 struct admhcd *ahcd = hcd_to_admhcd(hcd);
211 u32 status;
212  
213 if (!port)
214 return -EINVAL;
215 port--;
216  
217 /* start port reset before HNP protocol times out */
218 status = admhc_read_portstatus(ahcd, port);
219 if (!(status & ADMHC_PS_CCS))
220 return -ENODEV;
221  
222 /* khubd will finish the reset later */
223 admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
224 return 0;
225 }
226  
227 static void start_hnp(struct admhcd *ahcd);
228  
229 #else
230  
231 #define admhc_start_port_reset NULL
232  
233 #endif
234  
235 /*-------------------------------------------------------------------------*/
236  
237  
238 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
239 * not necessarily continuous ... to guard against resume signaling.
240 * The short timeout is safe for non-root hubs, and is backward-compatible
241 * with earlier Linux hosts.
242 */
243 #ifdef CONFIG_USB_SUSPEND
244 #define PORT_RESET_MSEC 50
245 #else
246 #define PORT_RESET_MSEC 10
247 #endif
248  
249 /* this timer value might be vendor-specific ... */
250 #define PORT_RESET_HW_MSEC 10
251  
252 /* wrap-aware logic morphed from <linux/jiffies.h> */
253 #define tick_before(t1, t2) ((s16)(((s16)(t1)) - ((s16)(t2))) < 0)
254  
255 /* called from some task, normally khubd */
256 static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
257 {
258 u32 t;
259  
260 admhc_vdbg(ahcd, "reset port%d\n", port);
261 t = admhc_read_portstatus(ahcd, port);
262 if (!(t & ADMHC_PS_CCS))
263 return -ENODEV;
264  
265 admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
266 mdelay(10);
267 admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
268 mdelay(100);
269  
270 return 0;
271 }
272  
273 static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
274 {
275 u32 t;
276  
277 admhc_vdbg(ahcd, "enable port%d\n", port);
278 t = admhc_read_portstatus(ahcd, port);
279 if (!(t & ADMHC_PS_CCS))
280 return -ENODEV;
281  
282 admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
283  
284 return 0;
285 }
286  
287 static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
288 {
289 u32 t;
290  
291 admhc_vdbg(ahcd, "disable port%d\n", port);
292 t = admhc_read_portstatus(ahcd, port);
293 if (!(t & ADMHC_PS_CCS))
294 return -ENODEV;
295  
296 admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
297  
298 return 0;
299 }
300  
301 static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
302 u32 val)
303 {
304 #ifdef ADMHC_VERBOSE_DEBUG
305 dbg_port_write(ahcd, "write", port, val);
306 #endif
307 admhc_write_portstatus(ahcd, port, val);
308  
309 return 0;
310 }
311  
312 static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
313 u16 wIndex, char *buf, u16 wLength)
314 {
315 struct admhcd *ahcd = hcd_to_admhcd(hcd);
316 int ports = ahcd->num_ports;
317 int ret = 0;
318  
319 if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
320 return -ESHUTDOWN;
321  
322 switch (typeReq) {
323 case ClearHubFeature:
324 switch (wValue) {
325 case C_HUB_OVER_CURRENT:
326 #if 0 /* FIXME */
327 admhc_writel(ahcd, ADMHC_RH_OCIC,
328 &ahcd->regs->roothub.status);
329 #endif
330 case C_HUB_LOCAL_POWER:
331 break;
332 default:
333 goto error;
334 }
335 break;
336 case ClearPortFeature:
337 if (!wIndex || wIndex > ports)
338 goto error;
339 wIndex--;
340  
341 switch (wValue) {
342 case USB_PORT_FEAT_ENABLE:
343 ret = admhc_port_disable(ahcd, wIndex);
344 break;
345 case USB_PORT_FEAT_SUSPEND:
346 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
347 break;
348 case USB_PORT_FEAT_POWER:
349 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
350 break;
351 case USB_PORT_FEAT_C_CONNECTION:
352 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
353 break;
354 case USB_PORT_FEAT_C_ENABLE:
355 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
356 break;
357 case USB_PORT_FEAT_C_SUSPEND:
358 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
359 break;
360 case USB_PORT_FEAT_C_OVER_CURRENT:
361 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
362 break;
363 case USB_PORT_FEAT_C_RESET:
364 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
365 break;
366 default:
367 goto error;
368 }
369 break;
370 case GetHubDescriptor:
371 ret = admhc_get_hub_descriptor(ahcd, buf);
372 break;
373 case GetHubStatus:
374 ret = admhc_get_hub_status(ahcd, buf);
375 break;
376 case GetPortStatus:
377 if (!wIndex || wIndex > ports)
378 goto error;
379 wIndex--;
380  
381 ret = admhc_get_port_status(ahcd, wIndex, buf);
382 break;
383 case SetHubFeature:
384 switch (wValue) {
385 case C_HUB_OVER_CURRENT:
386 /* FIXME: this can be cleared, yes? */
387 case C_HUB_LOCAL_POWER:
388 break;
389 default:
390 goto error;
391 }
392 break;
393 case SetPortFeature:
394 if (!wIndex || wIndex > ports)
395 goto error;
396 wIndex--;
397  
398 switch (wValue) {
399 case USB_PORT_FEAT_ENABLE:
400 ret = admhc_port_enable(ahcd, wIndex);
401 break;
402 case USB_PORT_FEAT_RESET:
403 ret = admhc_port_reset(ahcd, wIndex);
404 break;
405 case USB_PORT_FEAT_SUSPEND:
406 #ifdef CONFIG_USB_OTG
407 if (hcd->self.otg_port == (wIndex + 1)
408 && hcd->self.b_hnp_enable)
409 start_hnp(ahcd);
410 else
411 #endif
412 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
413 break;
414 case USB_PORT_FEAT_POWER:
415 ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
416 break;
417 default:
418 goto error;
419 }
420 break;
421  
422 default:
423 error:
424 /* "protocol stall" on error */
425 ret = -EPIPE;
426 }
427  
428 return ret;
429 }
430