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e9b29ffc PK |
1 | /* |
2 | * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver | |
3 | * | |
4 | * Copyright (C) 2006-2008 Barco N.V. | |
5 | * Derived from the Cypress cy7c67200/300 ezusb linux driver and | |
6 | * based on multiple host controller drivers inside the linux kernel. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
21 | * MA 02110-1301 USA. | |
22 | */ | |
23 | ||
24 | #include <linux/device.h> | |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/usb.h> | |
27 | ||
28 | #include "c67x00.h" | |
29 | #include "c67x00-hcd.h" | |
30 | ||
31 | /* -------------------------------------------------------------------------- | |
32 | * Root Hub Support | |
33 | */ | |
34 | ||
35 | static __u8 c67x00_hub_des[] = { | |
36 | 0x09, /* __u8 bLength; */ | |
37 | 0x29, /* __u8 bDescriptorType; Hub-descriptor */ | |
38 | 0x02, /* __u8 bNbrPorts; */ | |
39 | 0x00, /* __u16 wHubCharacteristics; */ | |
40 | 0x00, /* (per-port OC, no power switching) */ | |
41 | 0x32, /* __u8 bPwrOn2pwrGood; 2ms */ | |
42 | 0x00, /* __u8 bHubContrCurrent; 0 mA */ | |
43 | 0x00, /* __u8 DeviceRemovable; ** 7 Ports max ** */ | |
44 | 0xff, /* __u8 PortPwrCtrlMask; ** 7 ports max ** */ | |
45 | }; | |
46 | ||
47 | static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port) | |
48 | { | |
49 | struct c67x00_hcd *c67x00 = sie->private_data; | |
50 | unsigned long flags; | |
51 | ||
52 | c67x00_ll_husb_reset(sie, port); | |
53 | ||
54 | spin_lock_irqsave(&c67x00->lock, flags); | |
55 | c67x00_ll_husb_reset_port(sie, port); | |
56 | spin_unlock_irqrestore(&c67x00->lock, flags); | |
57 | ||
58 | c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT); | |
59 | } | |
60 | ||
61 | static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf) | |
62 | { | |
63 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
64 | struct c67x00_sie *sie = c67x00->sie; | |
65 | u16 status; | |
66 | int i; | |
67 | ||
68 | *buf = 0; | |
69 | status = c67x00_ll_usb_get_status(sie); | |
70 | for (i = 0; i < C67X00_PORTS; i++) | |
71 | if (status & PORT_CONNECT_CHANGE(i)) | |
72 | *buf |= (1 << i); | |
73 | ||
74 | /* bit 0 denotes hub change, b1..n port change */ | |
75 | *buf <<= 1; | |
76 | ||
77 | return !!*buf; | |
78 | } | |
79 | ||
80 | static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
81 | u16 wIndex, char *buf, u16 wLength) | |
82 | { | |
83 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
84 | struct c67x00_sie *sie = c67x00->sie; | |
85 | u16 status, usb_status; | |
86 | int len = 0; | |
87 | unsigned int port = wIndex-1; | |
88 | u16 wPortChange, wPortStatus; | |
89 | ||
90 | switch (typeReq) { | |
91 | ||
92 | case GetHubStatus: | |
93 | *(__le32 *) buf = cpu_to_le32(0); | |
94 | len = 4; /* hub power */ | |
95 | break; | |
96 | ||
97 | case GetPortStatus: | |
98 | if (wIndex > C67X00_PORTS) | |
99 | return -EPIPE; | |
100 | ||
101 | status = c67x00_ll_usb_get_status(sie); | |
102 | usb_status = c67x00_ll_get_usb_ctl(sie); | |
103 | ||
104 | wPortChange = 0; | |
105 | if (status & PORT_CONNECT_CHANGE(port)) | |
106 | wPortChange |= USB_PORT_STAT_C_CONNECTION; | |
107 | ||
108 | wPortStatus = USB_PORT_STAT_POWER; | |
109 | if (!(status & PORT_SE0_STATUS(port))) | |
110 | wPortStatus |= USB_PORT_STAT_CONNECTION; | |
111 | if (usb_status & LOW_SPEED_PORT(port)) { | |
112 | wPortStatus |= USB_PORT_STAT_LOW_SPEED; | |
113 | c67x00->low_speed_ports |= (1 << port); | |
114 | } else | |
115 | c67x00->low_speed_ports &= ~(1 << port); | |
116 | ||
117 | if (usb_status & SOF_EOP_EN(port)) | |
118 | wPortStatus |= USB_PORT_STAT_ENABLE; | |
119 | ||
120 | *(__le16 *) buf = cpu_to_le16(wPortStatus); | |
121 | *(__le16 *) (buf + 2) = cpu_to_le16(wPortChange); | |
122 | len = 4; | |
123 | break; | |
124 | ||
125 | case SetHubFeature: /* We don't implement these */ | |
126 | case ClearHubFeature: | |
127 | switch (wValue) { | |
128 | case C_HUB_OVER_CURRENT: | |
129 | case C_HUB_LOCAL_POWER: | |
130 | len = 0; | |
131 | break; | |
132 | ||
133 | default: | |
134 | return -EPIPE; | |
135 | } | |
136 | break; | |
137 | ||
138 | case SetPortFeature: | |
139 | if (wIndex > C67X00_PORTS) | |
140 | return -EPIPE; | |
141 | ||
142 | switch (wValue) { | |
143 | case USB_PORT_FEAT_SUSPEND: | |
144 | dev_dbg(c67x00_hcd_dev(c67x00), | |
145 | "SetPortFeature %d (SUSPEND)\n", port); | |
146 | len = 0; | |
147 | break; | |
148 | ||
149 | case USB_PORT_FEAT_RESET: | |
150 | c67x00_hub_reset_host_port(sie, port); | |
151 | len = 0; | |
152 | break; | |
153 | ||
154 | case USB_PORT_FEAT_POWER: | |
155 | /* Power always enabled */ | |
156 | len = 0; | |
157 | break; | |
158 | ||
159 | default: | |
160 | dev_dbg(c67x00_hcd_dev(c67x00), | |
161 | "%s: SetPortFeature %d (0x%04x) Error!\n", | |
162 | __func__, port, wValue); | |
163 | return -EPIPE; | |
164 | } | |
165 | break; | |
166 | ||
167 | case ClearPortFeature: | |
168 | if (wIndex > C67X00_PORTS) | |
169 | return -EPIPE; | |
170 | ||
171 | switch (wValue) { | |
172 | case USB_PORT_FEAT_ENABLE: | |
173 | /* Reset the port so that the c67x00 also notices the | |
174 | * disconnect */ | |
175 | c67x00_hub_reset_host_port(sie, port); | |
176 | len = 0; | |
177 | break; | |
178 | ||
179 | case USB_PORT_FEAT_C_ENABLE: | |
180 | dev_dbg(c67x00_hcd_dev(c67x00), | |
181 | "ClearPortFeature (%d): C_ENABLE\n", port); | |
182 | len = 0; | |
183 | break; | |
184 | ||
185 | case USB_PORT_FEAT_SUSPEND: | |
186 | dev_dbg(c67x00_hcd_dev(c67x00), | |
187 | "ClearPortFeature (%d): SUSPEND\n", port); | |
188 | len = 0; | |
189 | break; | |
190 | ||
191 | case USB_PORT_FEAT_C_SUSPEND: | |
192 | dev_dbg(c67x00_hcd_dev(c67x00), | |
193 | "ClearPortFeature (%d): C_SUSPEND\n", port); | |
194 | len = 0; | |
195 | break; | |
196 | ||
197 | case USB_PORT_FEAT_POWER: | |
198 | dev_dbg(c67x00_hcd_dev(c67x00), | |
199 | "ClearPortFeature (%d): POWER\n", port); | |
200 | return -EPIPE; | |
201 | ||
202 | case USB_PORT_FEAT_C_CONNECTION: | |
203 | c67x00_ll_usb_clear_status(sie, | |
204 | PORT_CONNECT_CHANGE(port)); | |
205 | len = 0; | |
206 | break; | |
207 | ||
208 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
209 | dev_dbg(c67x00_hcd_dev(c67x00), | |
210 | "ClearPortFeature (%d): OVER_CURRENT\n", port); | |
211 | len = 0; | |
212 | break; | |
213 | ||
214 | case USB_PORT_FEAT_C_RESET: | |
215 | dev_dbg(c67x00_hcd_dev(c67x00), | |
216 | "ClearPortFeature (%d): C_RESET\n", port); | |
217 | len = 0; | |
218 | break; | |
219 | ||
220 | default: | |
221 | dev_dbg(c67x00_hcd_dev(c67x00), | |
222 | "%s: ClearPortFeature %d (0x%04x) Error!\n", | |
223 | __func__, port, wValue); | |
224 | return -EPIPE; | |
225 | } | |
226 | break; | |
227 | ||
228 | case GetHubDescriptor: | |
229 | len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength); | |
230 | memcpy(buf, c67x00_hub_des, len); | |
231 | break; | |
232 | ||
233 | default: | |
234 | dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__); | |
235 | return -EPIPE; | |
236 | } | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* --------------------------------------------------------------------- | |
242 | * Main part of host controller driver | |
243 | */ | |
244 | ||
245 | /** | |
246 | * c67x00_hcd_irq | |
247 | * | |
248 | * This function is called from the interrupt handler in c67x00-drv.c | |
249 | */ | |
250 | static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg) | |
251 | { | |
252 | struct c67x00_hcd *c67x00 = sie->private_data; | |
253 | struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00); | |
254 | ||
255 | /* Handle sie message flags */ | |
256 | if (msg) { | |
257 | if (msg & HUSB_TDListDone) | |
258 | c67x00_sched_kick(c67x00); | |
259 | else | |
260 | dev_warn(c67x00_hcd_dev(c67x00), | |
261 | "Unknown SIE msg flag(s): 0x%04x\n", msg); | |
262 | } | |
263 | ||
264 | if (unlikely(hcd->state == HC_STATE_HALT)) | |
265 | return; | |
266 | ||
267 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) | |
268 | return; | |
269 | ||
270 | /* Handle Start of frame events */ | |
271 | if (int_status & SOFEOP_FLG(sie->sie_num)) { | |
272 | c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG); | |
273 | c67x00_sched_kick(c67x00); | |
274 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); | |
275 | } | |
276 | } | |
277 | ||
278 | /** | |
279 | * c67x00_hcd_start: Host controller start hook | |
280 | */ | |
281 | static int c67x00_hcd_start(struct usb_hcd *hcd) | |
282 | { | |
283 | hcd->uses_new_polling = 1; | |
284 | hcd->state = HC_STATE_RUNNING; | |
285 | hcd->poll_rh = 1; | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | /** | |
291 | * c67x00_hcd_stop: Host controller stop hook | |
292 | */ | |
293 | static void c67x00_hcd_stop(struct usb_hcd *hcd) | |
294 | { | |
295 | /* Nothing to do */ | |
296 | } | |
297 | ||
298 | static int c67x00_hcd_get_frame(struct usb_hcd *hcd) | |
299 | { | |
300 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
301 | u16 temp_val; | |
302 | ||
303 | dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__); | |
304 | temp_val = c67x00_ll_husb_get_frame(c67x00->sie); | |
305 | temp_val &= HOST_FRAME_MASK; | |
306 | return temp_val ? (temp_val - 1) : HOST_FRAME_MASK; | |
307 | } | |
308 | ||
309 | static struct hc_driver c67x00_hc_driver = { | |
310 | .description = "c67x00-hcd", | |
311 | .product_desc = "Cypress C67X00 Host Controller", | |
312 | .hcd_priv_size = sizeof(struct c67x00_hcd), | |
313 | .flags = HCD_USB11 | HCD_MEMORY, | |
314 | ||
315 | /* | |
316 | * basic lifecycle operations | |
317 | */ | |
318 | .start = c67x00_hcd_start, | |
319 | .stop = c67x00_hcd_stop, | |
320 | ||
321 | /* | |
322 | * managing i/o requests and associated device resources | |
323 | */ | |
324 | .urb_enqueue = c67x00_urb_enqueue, | |
325 | .urb_dequeue = c67x00_urb_dequeue, | |
326 | .endpoint_disable = c67x00_endpoint_disable, | |
327 | ||
328 | /* | |
329 | * scheduling support | |
330 | */ | |
331 | .get_frame_number = c67x00_hcd_get_frame, | |
332 | ||
333 | /* | |
334 | * root hub support | |
335 | */ | |
336 | .hub_status_data = c67x00_hub_status_data, | |
337 | .hub_control = c67x00_hub_control, | |
338 | }; | |
339 | ||
340 | /* --------------------------------------------------------------------- | |
341 | * Setup/Teardown routines | |
342 | */ | |
343 | ||
344 | int c67x00_hcd_probe(struct c67x00_sie *sie) | |
345 | { | |
346 | struct c67x00_hcd *c67x00; | |
347 | struct usb_hcd *hcd; | |
348 | unsigned long flags; | |
349 | int retval; | |
350 | ||
351 | if (usb_disabled()) | |
352 | return -ENODEV; | |
353 | ||
354 | hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie"); | |
355 | if (!hcd) { | |
356 | retval = -ENOMEM; | |
357 | goto err0; | |
358 | } | |
359 | c67x00 = hcd_to_c67x00_hcd(hcd); | |
360 | ||
361 | spin_lock_init(&c67x00->lock); | |
362 | c67x00->sie = sie; | |
363 | ||
364 | INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]); | |
365 | INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]); | |
366 | INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]); | |
367 | INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]); | |
368 | c67x00->urb_count = 0; | |
369 | INIT_LIST_HEAD(&c67x00->td_list); | |
370 | c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num); | |
371 | c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num); | |
372 | c67x00->max_frame_bw = MAX_FRAME_BW_STD; | |
373 | ||
374 | c67x00_ll_husb_init_host_port(sie); | |
375 | ||
376 | init_completion(&c67x00->endpoint_disable); | |
377 | retval = c67x00_sched_start_scheduler(c67x00); | |
378 | if (retval) | |
379 | goto err1; | |
380 | ||
381 | retval = usb_add_hcd(hcd, 0, 0); | |
382 | if (retval) { | |
383 | dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n", | |
384 | __func__, retval); | |
385 | goto err2; | |
386 | } | |
387 | ||
388 | spin_lock_irqsave(&sie->lock, flags); | |
389 | sie->private_data = c67x00; | |
390 | sie->irq = c67x00_hcd_irq; | |
391 | spin_unlock_irqrestore(&sie->lock, flags); | |
392 | ||
393 | return retval; | |
394 | ||
395 | err2: | |
396 | c67x00_sched_stop_scheduler(c67x00); | |
397 | err1: | |
398 | usb_put_hcd(hcd); | |
399 | err0: | |
400 | return retval; | |
401 | } | |
402 | ||
403 | /* may be called with controller, bus, and devices active */ | |
404 | void c67x00_hcd_remove(struct c67x00_sie *sie) | |
405 | { | |
406 | struct c67x00_hcd *c67x00 = sie->private_data; | |
407 | struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00); | |
408 | ||
409 | c67x00_sched_stop_scheduler(c67x00); | |
410 | usb_remove_hcd(hcd); | |
411 | usb_put_hcd(hcd); | |
412 | } |