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USB: sh: r8a66597-hcd: fix disconnect regression
[linux-2.6/mini2440.git] / drivers / usb / host / r8a66597-hcd.c
blobea7126f99cab33643c6d4e368a6f1b18fc0cd33c
1 /*
2 * R8A66597 HCD (Host Controller Driver)
3 *
4 * Copyright (C) 2006-2007 Renesas Solutions Corp.
5 * Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
6 * Portions Copyright (C) 2004-2005 David Brownell
7 * Portions Copyright (C) 1999 Roman Weissgaerber
8 *
9 * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; version 2 of the License.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/smp_lock.h>
30 #include <linux/errno.h>
31 #include <linux/init.h>
32 #include <linux/timer.h>
33 #include <linux/delay.h>
34 #include <linux/list.h>
35 #include <linux/interrupt.h>
36 #include <linux/usb.h>
37 #include <linux/platform_device.h>
38 #include <linux/io.h>
39 #include <linux/irq.h>
40
41 #include "../core/hcd.h"
42 #include "r8a66597.h"
43
44 MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
45 MODULE_LICENSE("GPL");
46 MODULE_AUTHOR("Yoshihiro Shimoda");
47 MODULE_ALIAS("platform:r8a66597_hcd");
48
49 #define DRIVER_VERSION "10 Apr 2008"
50
51 static const char hcd_name[] = "r8a66597_hcd";
52
53 /* module parameters */
54 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
55 static unsigned short clock = XTAL12;
56 module_param(clock, ushort, 0644);
57 MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
58 "(default=0)");
59 #endif
60
61 static unsigned short vif = LDRV;
62 module_param(vif, ushort, 0644);
63 MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)");
64
65 static unsigned short endian;
66 module_param(endian, ushort, 0644);
67 MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)");
68
69 static unsigned short irq_sense = INTL;
70 module_param(irq_sense, ushort, 0644);
71 MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=32, falling edge=0 "
72 "(default=32)");
73
74 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum);
75 static int r8a66597_get_frame(struct usb_hcd *hcd);
76
77 /* this function must be called with interrupt disabled */
78 static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
79 unsigned long reg)
80 {
81 u16 tmp;
82
83 tmp = r8a66597_read(r8a66597, INTENB0);
84 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
85 r8a66597_bset(r8a66597, 1 << pipenum, reg);
86 r8a66597_write(r8a66597, tmp, INTENB0);
87 }
88
89 /* this function must be called with interrupt disabled */
90 static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
91 unsigned long reg)
92 {
93 u16 tmp;
94
95 tmp = r8a66597_read(r8a66597, INTENB0);
96 r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
97 r8a66597_bclr(r8a66597, 1 << pipenum, reg);
98 r8a66597_write(r8a66597, tmp, INTENB0);
99 }
100
101 static void set_devadd_reg(struct r8a66597 *r8a66597, u8 r8a66597_address,
102 u16 usbspd, u8 upphub, u8 hubport, int port)
103 {
104 u16 val;
105 unsigned long devadd_reg = get_devadd_addr(r8a66597_address);
106
107 val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001);
108 r8a66597_write(r8a66597, val, devadd_reg);
109 }
110
111 static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
112 {
113 u16 tmp;
114 int i = 0;
115
116 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
117 do {
118 r8a66597_write(r8a66597, SCKE, SYSCFG0);
119 tmp = r8a66597_read(r8a66597, SYSCFG0);
120 if (i++ > 1000) {
121 err("register access fail.");
122 return -ENXIO;
123 }
124 } while ((tmp & SCKE) != SCKE);
125 r8a66597_write(r8a66597, 0x04, 0x02);
126 #else
127 do {
128 r8a66597_write(r8a66597, USBE, SYSCFG0);
129 tmp = r8a66597_read(r8a66597, SYSCFG0);
130 if (i++ > 1000) {
131 err("register access fail.");
132 return -ENXIO;
133 }
134 } while ((tmp & USBE) != USBE);
135 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
136 r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0);
137
138 i = 0;
139 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
140 do {
141 msleep(1);
142 tmp = r8a66597_read(r8a66597, SYSCFG0);
143 if (i++ > 500) {
144 err("register access fail.");
145 return -ENXIO;
146 }
147 } while ((tmp & SCKE) != SCKE);
148 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
149
150 return 0;
151 }
152
153 static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
154 {
155 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
156 udelay(1);
157 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
158 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
159 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
160 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
161 #endif
162 }
163
164 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
165 {
166 u16 val;
167
168 val = port ? DRPD : DCFM | DRPD;
169 r8a66597_bset(r8a66597, val, get_syscfg_reg(port));
170 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
171
172 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, get_dmacfg_reg(port));
173 r8a66597_bclr(r8a66597, DTCHE, get_intenb_reg(port));
174 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
175 }
176
177 static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port)
178 {
179 u16 val, tmp;
180
181 r8a66597_write(r8a66597, 0, get_intenb_reg(port));
182 r8a66597_write(r8a66597, 0, get_intsts_reg(port));
183
184 r8a66597_port_power(r8a66597, port, 0);
185
186 do {
187 tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
188 udelay(640);
189 } while (tmp == EDGESTS);
190
191 val = port ? DRPD : DCFM | DRPD;
192 r8a66597_bclr(r8a66597, val, get_syscfg_reg(port));
193 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
194 }
195
196 static int enable_controller(struct r8a66597 *r8a66597)
197 {
198 int ret, port;
199
200 ret = r8a66597_clock_enable(r8a66597);
201 if (ret < 0)
202 return ret;
203
204 r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
205 r8a66597_bset(r8a66597, USBE, SYSCFG0);
206
207 r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
208 r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
209 r8a66597_bset(r8a66597, BRDY0, BRDYENB);
210 r8a66597_bset(r8a66597, BEMP0, BEMPENB);
211
212 r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
213 r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
214 r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);
215 r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);
216
217 r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
218
219 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
220 r8a66597_enable_port(r8a66597, port);
221
222 return 0;
223 }
224
225 static void disable_controller(struct r8a66597 *r8a66597)
226 {
227 int port;
228
229 r8a66597_write(r8a66597, 0, INTENB0);
230 r8a66597_write(r8a66597, 0, INTSTS0);
231
232 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
233 r8a66597_disable_port(r8a66597, port);
234
235 r8a66597_clock_disable(r8a66597);
236 }
237
238 static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
239 struct usb_device *udev)
240 {
241 struct r8a66597_device *dev;
242
243 if (udev->parent && udev->parent->devnum != 1)
244 udev = udev->parent;
245
246 dev = dev_get_drvdata(&udev->dev);
247 if (dev)
248 return dev->address;
249 else
250 return 0;
251 }
252
253 static int is_child_device(char *devpath)
254 {
255 return (devpath[2] ? 1 : 0);
256 }
257
258 static int is_hub_limit(char *devpath)
259 {
260 return ((strlen(devpath) >= 4) ? 1 : 0);
261 }
262
263 static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
264 {
265 if (root_port) {
266 *root_port = (devpath[0] & 0x0F) - 1;
267 if (*root_port >= R8A66597_MAX_ROOT_HUB)
268 err("illegal root port number");
269 }
270 if (hub_port)
271 *hub_port = devpath[2] & 0x0F;
272 }
273
274 static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
275 {
276 u16 usbspd = 0;
277
278 switch (speed) {
279 case USB_SPEED_LOW:
280 usbspd = LSMODE;
281 break;
282 case USB_SPEED_FULL:
283 usbspd = FSMODE;
284 break;
285 case USB_SPEED_HIGH:
286 usbspd = HSMODE;
287 break;
288 default:
289 err("unknown speed");
290 break;
291 }
292
293 return usbspd;
294 }
295
296 static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
297 {
298 int idx;
299
300 idx = address / 32;
301 r8a66597->child_connect_map[idx] |= 1 << (address % 32);
302 }
303
304 static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
305 {
306 int idx;
307
308 idx = address / 32;
309 r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
310 }
311
312 static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
313 {
314 u16 pipenum = pipe->info.pipenum;
315 const unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
316 const unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
317 const unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};
318
319 if (dma_ch > R8A66597_PIPE_NO_DMA) /* dma fifo not use? */
320 dma_ch = R8A66597_PIPE_NO_DMA;
321
322 pipe->fifoaddr = fifoaddr[dma_ch];
323 pipe->fifosel = fifosel[dma_ch];
324 pipe->fifoctr = fifoctr[dma_ch];
325
326 if (pipenum == 0)
327 pipe->pipectr = DCPCTR;
328 else
329 pipe->pipectr = get_pipectr_addr(pipenum);
330
331 if (check_bulk_or_isoc(pipenum)) {
332 pipe->pipetre = get_pipetre_addr(pipenum);
333 pipe->pipetrn = get_pipetrn_addr(pipenum);
334 } else {
335 pipe->pipetre = 0;
336 pipe->pipetrn = 0;
337 }
338 }
339
340 static struct r8a66597_device *
341 get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
342 {
343 if (usb_pipedevice(urb->pipe) == 0)
344 return &r8a66597->device0;
345
346 return dev_get_drvdata(&urb->dev->dev);
347 }
348
349 static int make_r8a66597_device(struct r8a66597 *r8a66597,
350 struct urb *urb, u8 addr)
351 {
352 struct r8a66597_device *dev;
353 int usb_address = urb->setup_packet[2]; /* urb->pipe is address 0 */
354
355 dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
356 if (dev == NULL)
357 return -ENOMEM;
358
359 dev_set_drvdata(&urb->dev->dev, dev);
360 dev->udev = urb->dev;
361 dev->address = addr;
362 dev->usb_address = usb_address;
363 dev->state = USB_STATE_ADDRESS;
364 dev->ep_in_toggle = 0;
365 dev->ep_out_toggle = 0;
366 INIT_LIST_HEAD(&dev->device_list);
367 list_add_tail(&dev->device_list, &r8a66597->child_device);
368
369 get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
370 if (!is_child_device(urb->dev->devpath))
371 r8a66597->root_hub[dev->root_port].dev = dev;
372
373 set_devadd_reg(r8a66597, dev->address,
374 get_r8a66597_usb_speed(urb->dev->speed),
375 get_parent_r8a66597_address(r8a66597, urb->dev),
376 dev->hub_port, dev->root_port);
377
378 return 0;
379 }
380
381 /* this function must be called with interrupt disabled */
382 static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
383 {
384 u8 addr; /* R8A66597's address */
385 struct r8a66597_device *dev;
386
387 if (is_hub_limit(urb->dev->devpath)) {
388 err("Externel hub limit reached.");
389 return 0;
390 }
391
392 dev = get_urb_to_r8a66597_dev(r8a66597, urb);
393 if (dev && dev->state >= USB_STATE_ADDRESS)
394 return dev->address;
395
396 for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
397 if (r8a66597->address_map & (1 << addr))
398 continue;
399
400 dbg("alloc_address: r8a66597_addr=%d", addr);
401 r8a66597->address_map |= 1 << addr;
402
403 if (make_r8a66597_device(r8a66597, urb, addr) < 0)
404 return 0;
405
406 return addr;
407 }
408
409 err("cannot communicate with a USB device more than 10.(%x)",
410 r8a66597->address_map);
411
412 return 0;
413 }
414
415 /* this function must be called with interrupt disabled */
416 static void free_usb_address(struct r8a66597 *r8a66597,
417 struct r8a66597_device *dev)
418 {
419 int port;
420
421 if (!dev)
422 return;
423
424 dbg("free_addr: addr=%d", dev->address);
425
426 dev->state = USB_STATE_DEFAULT;
427 r8a66597->address_map &= ~(1 << dev->address);
428 dev->address = 0;
429 dev_set_drvdata(&dev->udev->dev, NULL);
430 list_del(&dev->device_list);
431 kfree(dev);
432
433 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
434 if (r8a66597->root_hub[port].dev == dev) {
435 r8a66597->root_hub[port].dev = NULL;
436 break;
437 }
438 }
439 }
440
441 static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
442 u16 mask, u16 loop)
443 {
444 u16 tmp;
445 int i = 0;
446
447 do {
448 tmp = r8a66597_read(r8a66597, reg);
449 if (i++ > 1000000) {
450 err("register%lx, loop %x is timeout", reg, loop);
451 break;
452 }
453 ndelay(1);
454 } while ((tmp & mask) != loop);
455 }
456
457 /* this function must be called with interrupt disabled */
458 static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
459 {
460 u16 tmp;
461
462 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
463 if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
464 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
465 r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
466 }
467
468 /* this function must be called with interrupt disabled */
469 static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
470 {
471 u16 tmp;
472
473 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
474 if ((tmp & PID_STALL11) != PID_STALL11) /* force stall? */
475 r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
476 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
477 r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
478 }
479
480 /* this function must be called with interrupt disabled */
481 static void clear_all_buffer(struct r8a66597 *r8a66597,
482 struct r8a66597_pipe *pipe)
483 {
484 u16 tmp;
485
486 if (!pipe || pipe->info.pipenum == 0)
487 return;
488
489 pipe_stop(r8a66597, pipe);
490 r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
491 tmp = r8a66597_read(r8a66597, pipe->pipectr);
492 tmp = r8a66597_read(r8a66597, pipe->pipectr);
493 tmp = r8a66597_read(r8a66597, pipe->pipectr);
494 r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
495 }
496
497 /* this function must be called with interrupt disabled */
498 static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
499 struct r8a66597_pipe *pipe, int toggle)
500 {
501 if (toggle)
502 r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
503 else
504 r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
505 }
506
507 /* this function must be called with interrupt disabled */
508 static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
509 {
510 r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
511 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
512 }
513
514 /* this function must be called with interrupt disabled */
515 static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
516 struct r8a66597_pipe *pipe)
517 {
518 cfifo_change(r8a66597, 0);
519 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
520 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);
521
522 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
523 pipe->fifosel);
524 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
525 }
526
527 static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
528 {
529 struct r8a66597_pipe *pipe = hep->hcpriv;
530
531 if (usb_pipeendpoint(urb->pipe) == 0)
532 return 0;
533 else
534 return pipe->info.pipenum;
535 }
536
537 static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
538 {
539 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
540
541 return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
542 }
543
544 static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
545 int urb_pipe)
546 {
547 if (!dev)
548 return NULL;
549
550 return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
551 }
552
553 /* this function must be called with interrupt disabled */
554 static void pipe_toggle_set(struct r8a66597 *r8a66597,
555 struct r8a66597_pipe *pipe,
556 struct urb *urb, int set)
557 {
558 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
559 unsigned char endpoint = usb_pipeendpoint(urb->pipe);
560 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
561
562 if (!toggle)
563 return;
564
565 if (set)
566 *toggle |= 1 << endpoint;
567 else
568 *toggle &= ~(1 << endpoint);
569 }
570
571 /* this function must be called with interrupt disabled */
572 static void pipe_toggle_save(struct r8a66597 *r8a66597,
573 struct r8a66597_pipe *pipe,
574 struct urb *urb)
575 {
576 if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
577 pipe_toggle_set(r8a66597, pipe, urb, 1);
578 else
579 pipe_toggle_set(r8a66597, pipe, urb, 0);
580 }
581
582 /* this function must be called with interrupt disabled */
583 static void pipe_toggle_restore(struct r8a66597 *r8a66597,
584 struct r8a66597_pipe *pipe,
585 struct urb *urb)
586 {
587 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
588 unsigned char endpoint = usb_pipeendpoint(urb->pipe);
589 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
590
591 if (!toggle)
592 return;
593
594 r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
595 }
596
597 /* this function must be called with interrupt disabled */
598 static void pipe_buffer_setting(struct r8a66597 *r8a66597,
599 struct r8a66597_pipe_info *info)
600 {
601 u16 val = 0;
602
603 if (info->pipenum == 0)
604 return;
605
606 r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
607 r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
608 r8a66597_write(r8a66597, info->pipenum, PIPESEL);
609 if (!info->dir_in)
610 val |= R8A66597_DIR;
611 if (info->type == R8A66597_BULK && info->dir_in)
612 val |= R8A66597_DBLB | R8A66597_SHTNAK;
613 val |= info->type | info->epnum;
614 r8a66597_write(r8a66597, val, PIPECFG);
615
616 r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
617 PIPEBUF);
618 r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
619 PIPEMAXP);
620 r8a66597_write(r8a66597, info->interval, PIPEPERI);
621 }
622
623 /* this function must be called with interrupt disabled */
624 static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
625 {
626 struct r8a66597_pipe_info *info;
627 struct urb *urb = td->urb;
628
629 if (td->pipenum > 0) {
630 info = &td->pipe->info;
631 cfifo_change(r8a66597, 0);
632 pipe_buffer_setting(r8a66597, info);
633
634 if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
635 usb_pipeout(urb->pipe)) &&
636 !usb_pipecontrol(urb->pipe)) {
637 r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
638 pipe_toggle_set(r8a66597, td->pipe, urb, 0);
639 clear_all_buffer(r8a66597, td->pipe);
640 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
641 usb_pipeout(urb->pipe), 1);
642 }
643 pipe_toggle_restore(r8a66597, td->pipe, urb);
644 }
645 }
646
647 /* this function must be called with interrupt disabled */
648 static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
649 struct usb_endpoint_descriptor *ep)
650 {
651 u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;
652
653 memset(array, 0, sizeof(array));
654 switch (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
655 case USB_ENDPOINT_XFER_BULK:
656 if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
657 array[i++] = 4;
658 else {
659 array[i++] = 3;
660 array[i++] = 5;
661 }
662 break;
663 case USB_ENDPOINT_XFER_INT:
664 if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
665 array[i++] = 6;
666 array[i++] = 7;
667 array[i++] = 8;
668 } else
669 array[i++] = 9;
670 break;
671 case USB_ENDPOINT_XFER_ISOC:
672 if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
673 array[i++] = 2;
674 else
675 array[i++] = 1;
676 break;
677 default:
678 err("Illegal type");
679 return 0;
680 }
681
682 i = 1;
683 min = array[0];
684 while (array[i] != 0) {
685 if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
686 min = array[i];
687 i++;
688 }
689
690 return min;
691 }
692
693 static u16 get_r8a66597_type(__u8 type)
694 {
695 u16 r8a66597_type;
696
697 switch (type) {
698 case USB_ENDPOINT_XFER_BULK:
699 r8a66597_type = R8A66597_BULK;
700 break;
701 case USB_ENDPOINT_XFER_INT:
702 r8a66597_type = R8A66597_INT;
703 break;
704 case USB_ENDPOINT_XFER_ISOC:
705 r8a66597_type = R8A66597_ISO;
706 break;
707 default:
708 err("Illegal type");
709 r8a66597_type = 0x0000;
710 break;
711 }
712
713 return r8a66597_type;
714 }
715
716 static u16 get_bufnum(u16 pipenum)
717 {
718 u16 bufnum = 0;
719
720 if (pipenum == 0)
721 bufnum = 0;
722 else if (check_bulk_or_isoc(pipenum))
723 bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
724 else if (check_interrupt(pipenum))
725 bufnum = 4 + (pipenum - 6);
726 else
727 err("Illegal pipenum (%d)", pipenum);
728
729 return bufnum;
730 }
731
732 static u16 get_buf_bsize(u16 pipenum)
733 {
734 u16 buf_bsize = 0;
735
736 if (pipenum == 0)
737 buf_bsize = 3;
738 else if (check_bulk_or_isoc(pipenum))
739 buf_bsize = R8A66597_BUF_BSIZE - 1;
740 else if (check_interrupt(pipenum))
741 buf_bsize = 0;
742 else
743 err("Illegal pipenum (%d)", pipenum);
744
745 return buf_bsize;
746 }
747
748 /* this function must be called with interrupt disabled */
749 static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
750 struct r8a66597_device *dev,
751 struct r8a66597_pipe *pipe,
752 struct urb *urb)
753 {
754 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
755 int i;
756 struct r8a66597_pipe_info *info = &pipe->info;
757
758 if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
759 for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
760 if ((r8a66597->dma_map & (1 << i)) != 0)
761 continue;
762
763 info("address %d, EndpointAddress 0x%02x use DMA FIFO",
764 usb_pipedevice(urb->pipe),
765 info->dir_in ? USB_ENDPOINT_DIR_MASK + info->epnum
766 : info->epnum);
767
768 r8a66597->dma_map |= 1 << i;
769 dev->dma_map |= 1 << i;
770 set_pipe_reg_addr(pipe, i);
771
772 cfifo_change(r8a66597, 0);
773 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
774 MBW | CURPIPE, pipe->fifosel);
775
776 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
777 pipe->info.pipenum);
778 r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
779 break;
780 }
781 }
782 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
783 }
784
785 /* this function must be called with interrupt disabled */
786 static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
787 struct usb_host_endpoint *hep,
788 struct r8a66597_pipe_info *info)
789 {
790 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
791 struct r8a66597_pipe *pipe = hep->hcpriv;
792
793 dbg("enable_pipe:");
794
795 pipe->info = *info;
796 set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
797 r8a66597->pipe_cnt[pipe->info.pipenum]++;
798 dev->pipe_cnt[pipe->info.pipenum]++;
799
800 enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
801 }
802
803 /* this function must be called with interrupt disabled */
804 static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
805 {
806 struct r8a66597_td *td, *next;
807 struct urb *urb;
808 struct list_head *list = &r8a66597->pipe_queue[pipenum];
809
810 if (list_empty(list))
811 return;
812
813 list_for_each_entry_safe(td, next, list, queue) {
814 if (!td)
815 continue;
816 if (td->address != address)
817 continue;
818
819 urb = td->urb;
820 list_del(&td->queue);
821 kfree(td);
822
823 if (urb) {
824 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
825 urb);
826
827 spin_unlock(&r8a66597->lock);
828 usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb,
829 -ENODEV);
830 spin_lock(&r8a66597->lock);
831 }
832 break;
833 }
834 }
835
836 /* this function must be called with interrupt disabled */
837 static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
838 struct r8a66597_device *dev)
839 {
840 int check_ep0 = 0;
841 u16 pipenum;
842
843 if (!dev)
844 return;
845
846 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
847 if (!dev->pipe_cnt[pipenum])
848 continue;
849
850 if (!check_ep0) {
851 check_ep0 = 1;
852 force_dequeue(r8a66597, 0, dev->address);
853 }
854
855 r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
856 dev->pipe_cnt[pipenum] = 0;
857 force_dequeue(r8a66597, pipenum, dev->address);
858 }
859
860 dbg("disable_pipe");
861
862 r8a66597->dma_map &= ~(dev->dma_map);
863 dev->dma_map = 0;
864 }
865
866 static u16 get_interval(struct urb *urb, __u8 interval)
867 {
868 u16 time = 1;
869 int i;
870
871 if (urb->dev->speed == USB_SPEED_HIGH) {
872 if (interval > IITV)
873 time = IITV;
874 else
875 time = interval ? interval - 1 : 0;
876 } else {
877 if (interval > 128) {
878 time = IITV;
879 } else {
880 /* calculate the nearest value for PIPEPERI */
881 for (i = 0; i < 7; i++) {
882 if ((1 << i) < interval &&
883 (1 << (i + 1) > interval))
884 time = 1 << i;
885 }
886 }
887 }
888
889 return time;
890 }
891
892 static unsigned long get_timer_interval(struct urb *urb, __u8 interval)
893 {
894 __u8 i;
895 unsigned long time = 1;
896
897 if (usb_pipeisoc(urb->pipe))
898 return 0;
899
900 if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) {
901 for (i = 0; i < (interval - 1); i++)
902 time *= 2;
903 time = time * 125 / 1000; /* uSOF -> msec */
904 } else {
905 time = interval;
906 }
907
908 return time;
909 }
910
911 /* this function must be called with interrupt disabled */
912 static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
913 struct usb_host_endpoint *hep,
914 struct usb_endpoint_descriptor *ep)
915 {
916 struct r8a66597_pipe_info info;
917
918 info.pipenum = get_empty_pipenum(r8a66597, ep);
919 info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
920 info.epnum = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
921 info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
922 info.type = get_r8a66597_type(ep->bmAttributes
923 & USB_ENDPOINT_XFERTYPE_MASK);
924 info.bufnum = get_bufnum(info.pipenum);
925 info.buf_bsize = get_buf_bsize(info.pipenum);
926 if (info.type == R8A66597_BULK) {
927 info.interval = 0;
928 info.timer_interval = 0;
929 } else {
930 info.interval = get_interval(urb, ep->bInterval);
931 info.timer_interval = get_timer_interval(urb, ep->bInterval);
932 }
933 if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
934 info.dir_in = 1;
935 else
936 info.dir_in = 0;
937
938 enable_r8a66597_pipe(r8a66597, urb, hep, &info);
939 }
940
941 static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
942 {
943 struct r8a66597_device *dev;
944
945 dev = get_urb_to_r8a66597_dev(r8a66597, urb);
946 dev->state = USB_STATE_CONFIGURED;
947 }
948
949 static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
950 u16 pipenum)
951 {
952 if (pipenum == 0 && usb_pipeout(urb->pipe))
953 enable_irq_empty(r8a66597, pipenum);
954 else
955 enable_irq_ready(r8a66597, pipenum);
956
957 if (!usb_pipeisoc(urb->pipe))
958 enable_irq_nrdy(r8a66597, pipenum);
959 }
960
961 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
962 {
963 disable_irq_ready(r8a66597, pipenum);
964 disable_irq_nrdy(r8a66597, pipenum);
965 }
966
967 static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597)
968 {
969 mod_timer(&r8a66597->rh_timer,
970 jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME));
971 }
972
973 static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port,
974 int connect)
975 {
976 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
977
978 rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
979 rh->scount = R8A66597_MAX_SAMPLING;
980 if (connect)
981 rh->port |= 1 << USB_PORT_FEAT_CONNECTION;
982 else
983 rh->port &= ~(1 << USB_PORT_FEAT_CONNECTION);
984 rh->port |= 1 << USB_PORT_FEAT_C_CONNECTION;
985
986 r8a66597_root_hub_start_polling(r8a66597);
987 }
988
989 /* this function must be called with interrupt disabled */
990 static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port,
991 u16 syssts)
992 {
993 if (syssts == SE0) {
994 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
995 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
996 return;
997 }
998
999 if (syssts == FS_JSTS)
1000 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
1001 else if (syssts == LS_JSTS)
1002 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
1003
1004 r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
1005 r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
1006 }
1007
1008 /* this function must be called with interrupt disabled */
1009 static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
1010 {
1011 u16 speed = get_rh_usb_speed(r8a66597, port);
1012 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1013
1014 if (speed == HSMODE)
1015 rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED);
1016 else if (speed == LSMODE)
1017 rh->port |= (1 << USB_PORT_FEAT_LOWSPEED);
1018
1019 rh->port &= ~(1 << USB_PORT_FEAT_RESET);
1020 rh->port |= 1 << USB_PORT_FEAT_ENABLE;
1021 }
1022
1023 /* this function must be called with interrupt disabled */
1024 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
1025 {
1026 struct r8a66597_device *dev = r8a66597->root_hub[port].dev;
1027
1028 disable_r8a66597_pipe_all(r8a66597, dev);
1029 free_usb_address(r8a66597, dev);
1030
1031 start_root_hub_sampling(r8a66597, port, 0);
1032 }
1033
1034 /* this function must be called with interrupt disabled */
1035 static void prepare_setup_packet(struct r8a66597 *r8a66597,
1036 struct r8a66597_td *td)
1037 {
1038 int i;
1039 __le16 *p = (__le16 *)td->urb->setup_packet;
1040 unsigned long setup_addr = USBREQ;
1041
1042 r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
1043 DCPMAXP);
1044 r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
1045
1046 for (i = 0; i < 4; i++) {
1047 r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
1048 setup_addr += 2;
1049 }
1050 r8a66597_write(r8a66597, SUREQ, DCPCTR);
1051 }
1052
1053 /* this function must be called with interrupt disabled */
1054 static void prepare_packet_read(struct r8a66597 *r8a66597,
1055 struct r8a66597_td *td)
1056 {
1057 struct urb *urb = td->urb;
1058
1059 if (usb_pipecontrol(urb->pipe)) {
1060 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1061 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1062 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1063 if (urb->actual_length == 0) {
1064 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1065 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1066 }
1067 pipe_irq_disable(r8a66597, td->pipenum);
1068 pipe_start(r8a66597, td->pipe);
1069 pipe_irq_enable(r8a66597, urb, td->pipenum);
1070 } else {
1071 if (urb->actual_length == 0) {
1072 pipe_irq_disable(r8a66597, td->pipenum);
1073 pipe_setting(r8a66597, td);
1074 pipe_stop(r8a66597, td->pipe);
1075 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1076
1077 if (td->pipe->pipetre) {
1078 r8a66597_write(r8a66597, TRCLR,
1079 td->pipe->pipetre);
1080 r8a66597_write(r8a66597,
1081 DIV_ROUND_UP
1082 (urb->transfer_buffer_length,
1083 td->maxpacket),
1084 td->pipe->pipetrn);
1085 r8a66597_bset(r8a66597, TRENB,
1086 td->pipe->pipetre);
1087 }
1088
1089 pipe_start(r8a66597, td->pipe);
1090 pipe_irq_enable(r8a66597, urb, td->pipenum);
1091 }
1092 }
1093 }
1094
1095 /* this function must be called with interrupt disabled */
1096 static void prepare_packet_write(struct r8a66597 *r8a66597,
1097 struct r8a66597_td *td)
1098 {
1099 u16 tmp;
1100 struct urb *urb = td->urb;
1101
1102 if (usb_pipecontrol(urb->pipe)) {
1103 pipe_stop(r8a66597, td->pipe);
1104 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1105 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1106 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1107 if (urb->actual_length == 0) {
1108 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1109 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1110 }
1111 } else {
1112 if (urb->actual_length == 0)
1113 pipe_setting(r8a66597, td);
1114 if (td->pipe->pipetre)
1115 r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
1116 }
1117 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1118
1119 fifo_change_from_pipe(r8a66597, td->pipe);
1120 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1121 if (unlikely((tmp & FRDY) == 0))
1122 pipe_irq_enable(r8a66597, urb, td->pipenum);
1123 else
1124 packet_write(r8a66597, td->pipenum);
1125 pipe_start(r8a66597, td->pipe);
1126 }
1127
1128 /* this function must be called with interrupt disabled */
1129 static void prepare_status_packet(struct r8a66597 *r8a66597,
1130 struct r8a66597_td *td)
1131 {
1132 struct urb *urb = td->urb;
1133
1134 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1135 pipe_stop(r8a66597, td->pipe);
1136
1137 if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
1138 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1139 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1140 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1141 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
1142 r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR);
1143 enable_irq_empty(r8a66597, 0);
1144 } else {
1145 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1146 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1147 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1148 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1149 enable_irq_ready(r8a66597, 0);
1150 }
1151 enable_irq_nrdy(r8a66597, 0);
1152 pipe_start(r8a66597, td->pipe);
1153 }
1154
1155 static int is_set_address(unsigned char *setup_packet)
1156 {
1157 if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
1158 setup_packet[1] == USB_REQ_SET_ADDRESS)
1159 return 1;
1160 else
1161 return 0;
1162 }
1163
1164 /* this function must be called with interrupt disabled */
1165 static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1166 {
1167 BUG_ON(!td);
1168
1169 switch (td->type) {
1170 case USB_PID_SETUP:
1171 if (is_set_address(td->urb->setup_packet)) {
1172 td->set_address = 1;
1173 td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
1174 td->urb);
1175 if (td->urb->setup_packet[2] == 0)
1176 return -EPIPE;
1177 }
1178 prepare_setup_packet(r8a66597, td);
1179 break;
1180 case USB_PID_IN:
1181 prepare_packet_read(r8a66597, td);
1182 break;
1183 case USB_PID_OUT:
1184 prepare_packet_write(r8a66597, td);
1185 break;
1186 case USB_PID_ACK:
1187 prepare_status_packet(r8a66597, td);
1188 break;
1189 default:
1190 err("invalid type.");
1191 break;
1192 }
1193
1194 return 0;
1195 }
1196
1197 static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
1198 {
1199 if (usb_pipeisoc(urb->pipe)) {
1200 if (urb->number_of_packets == td->iso_cnt)
1201 return 1;
1202 }
1203
1204 /* control or bulk or interrupt */
1205 if ((urb->transfer_buffer_length <= urb->actual_length) ||
1206 (td->short_packet) || (td->zero_packet))
1207 return 1;
1208
1209 return 0;
1210 }
1211
1212 /* this function must be called with interrupt disabled */
1213 static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1214 {
1215 unsigned long time;
1216
1217 BUG_ON(!td);
1218
1219 if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
1220 !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
1221 r8a66597->timeout_map |= 1 << td->pipenum;
1222 switch (usb_pipetype(td->urb->pipe)) {
1223 case PIPE_INTERRUPT:
1224 case PIPE_ISOCHRONOUS:
1225 time = 30;
1226 break;
1227 default:
1228 time = 300;
1229 break;
1230 }
1231
1232 mod_timer(&r8a66597->td_timer[td->pipenum],
1233 jiffies + msecs_to_jiffies(time));
1234 }
1235 }
1236
1237 /* this function must be called with interrupt disabled */
1238 static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
1239 u16 pipenum, struct urb *urb, int status)
1240 __releases(r8a66597->lock) __acquires(r8a66597->lock)
1241 {
1242 int restart = 0;
1243 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
1244
1245 r8a66597->timeout_map &= ~(1 << pipenum);
1246
1247 if (likely(td)) {
1248 if (td->set_address && (status != 0 || urb->unlinked))
1249 r8a66597->address_map &= ~(1 << urb->setup_packet[2]);
1250
1251 pipe_toggle_save(r8a66597, td->pipe, urb);
1252 list_del(&td->queue);
1253 kfree(td);
1254 }
1255
1256 if (!list_empty(&r8a66597->pipe_queue[pipenum]))
1257 restart = 1;
1258
1259 if (likely(urb)) {
1260 if (usb_pipeisoc(urb->pipe))
1261 urb->start_frame = r8a66597_get_frame(hcd);
1262
1263 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
1264 spin_unlock(&r8a66597->lock);
1265 usb_hcd_giveback_urb(hcd, urb, status);
1266 spin_lock(&r8a66597->lock);
1267 }
1268
1269 if (restart) {
1270 td = r8a66597_get_td(r8a66597, pipenum);
1271 if (unlikely(!td))
1272 return;
1273
1274 start_transfer(r8a66597, td);
1275 set_td_timer(r8a66597, td);
1276 }
1277 }
1278
1279 static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
1280 {
1281 u16 tmp;
1282 int rcv_len, bufsize, urb_len, size;
1283 u16 *buf;
1284 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1285 struct urb *urb;
1286 int finish = 0;
1287 int status = 0;
1288
1289 if (unlikely(!td))
1290 return;
1291 urb = td->urb;
1292
1293 fifo_change_from_pipe(r8a66597, td->pipe);
1294 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1295 if (unlikely((tmp & FRDY) == 0)) {
1296 pipe_stop(r8a66597, td->pipe);
1297 pipe_irq_disable(r8a66597, pipenum);
1298 err("in fifo not ready (%d)", pipenum);
1299 finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
1300 return;
1301 }
1302
1303 /* prepare parameters */
1304 rcv_len = tmp & DTLN;
1305 if (usb_pipeisoc(urb->pipe)) {
1306 buf = (u16 *)(urb->transfer_buffer +
1307 urb->iso_frame_desc[td->iso_cnt].offset);
1308 urb_len = urb->iso_frame_desc[td->iso_cnt].length;
1309 } else {
1310 buf = (void *)urb->transfer_buffer + urb->actual_length;
1311 urb_len = urb->transfer_buffer_length - urb->actual_length;
1312 }
1313 bufsize = min(urb_len, (int) td->maxpacket);
1314 if (rcv_len <= bufsize) {
1315 size = rcv_len;
1316 } else {
1317 size = bufsize;
1318 status = -EOVERFLOW;
1319 finish = 1;
1320 }
1321
1322 /* update parameters */
1323 urb->actual_length += size;
1324 if (rcv_len == 0)
1325 td->zero_packet = 1;
1326 if (rcv_len < bufsize) {
1327 td->short_packet = 1;
1328 }
1329 if (usb_pipeisoc(urb->pipe)) {
1330 urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1331 urb->iso_frame_desc[td->iso_cnt].status = status;
1332 td->iso_cnt++;
1333 finish = 0;
1334 }
1335
1336 /* check transfer finish */
1337 if (finish || check_transfer_finish(td, urb)) {
1338 pipe_stop(r8a66597, td->pipe);
1339 pipe_irq_disable(r8a66597, pipenum);
1340 finish = 1;
1341 }
1342
1343 /* read fifo */
1344 if (urb->transfer_buffer) {
1345 if (size == 0)
1346 r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
1347 else
1348 r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
1349 buf, size);
1350 }
1351
1352 if (finish && pipenum != 0)
1353 finish_request(r8a66597, td, pipenum, urb, status);
1354 }
1355
1356 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
1357 {
1358 u16 tmp;
1359 int bufsize, size;
1360 u16 *buf;
1361 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1362 struct urb *urb;
1363
1364 if (unlikely(!td))
1365 return;
1366 urb = td->urb;
1367
1368 fifo_change_from_pipe(r8a66597, td->pipe);
1369 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1370 if (unlikely((tmp & FRDY) == 0)) {
1371 pipe_stop(r8a66597, td->pipe);
1372 pipe_irq_disable(r8a66597, pipenum);
1373 err("out write fifo not ready. (%d)", pipenum);
1374 finish_request(r8a66597, td, pipenum, urb, -EPIPE);
1375 return;
1376 }
1377
1378 /* prepare parameters */
1379 bufsize = td->maxpacket;
1380 if (usb_pipeisoc(urb->pipe)) {
1381 buf = (u16 *)(urb->transfer_buffer +
1382 urb->iso_frame_desc[td->iso_cnt].offset);
1383 size = min(bufsize,
1384 (int)urb->iso_frame_desc[td->iso_cnt].length);
1385 } else {
1386 buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
1387 size = min((int)bufsize,
1388 urb->transfer_buffer_length - urb->actual_length);
1389 }
1390
1391 /* write fifo */
1392 if (pipenum > 0)
1393 r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
1394 if (urb->transfer_buffer) {
1395 r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
1396 if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
1397 r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
1398 }
1399
1400 /* update parameters */
1401 urb->actual_length += size;
1402 if (usb_pipeisoc(urb->pipe)) {
1403 urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1404 urb->iso_frame_desc[td->iso_cnt].status = 0;
1405 td->iso_cnt++;
1406 }
1407
1408 /* check transfer finish */
1409 if (check_transfer_finish(td, urb)) {
1410 disable_irq_ready(r8a66597, pipenum);
1411 enable_irq_empty(r8a66597, pipenum);
1412 if (!usb_pipeisoc(urb->pipe))
1413 enable_irq_nrdy(r8a66597, pipenum);
1414 } else
1415 pipe_irq_enable(r8a66597, urb, pipenum);
1416 }
1417
1418
1419 static void check_next_phase(struct r8a66597 *r8a66597, int status)
1420 {
1421 struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
1422 struct urb *urb;
1423 u8 finish = 0;
1424
1425 if (unlikely(!td))
1426 return;
1427 urb = td->urb;
1428
1429 switch (td->type) {
1430 case USB_PID_IN:
1431 case USB_PID_OUT:
1432 if (check_transfer_finish(td, urb))
1433 td->type = USB_PID_ACK;
1434 break;
1435 case USB_PID_SETUP:
1436 if (urb->transfer_buffer_length == urb->actual_length)
1437 td->type = USB_PID_ACK;
1438 else if (usb_pipeout(urb->pipe))
1439 td->type = USB_PID_OUT;
1440 else
1441 td->type = USB_PID_IN;
1442 break;
1443 case USB_PID_ACK:
1444 finish = 1;
1445 break;
1446 }
1447
1448 if (finish || status != 0 || urb->unlinked)
1449 finish_request(r8a66597, td, 0, urb, status);
1450 else
1451 start_transfer(r8a66597, td);
1452 }
1453
1454 static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
1455 {
1456 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1457
1458 if (td) {
1459 u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;
1460
1461 if (pid == PID_NAK)
1462 return -ECONNRESET;
1463 else
1464 return -EPIPE;
1465 }
1466 return 0;
1467 }
1468
1469 static void irq_pipe_ready(struct r8a66597 *r8a66597)
1470 {
1471 u16 check;
1472 u16 pipenum;
1473 u16 mask;
1474 struct r8a66597_td *td;
1475
1476 mask = r8a66597_read(r8a66597, BRDYSTS)
1477 & r8a66597_read(r8a66597, BRDYENB);
1478 r8a66597_write(r8a66597, ~mask, BRDYSTS);
1479 if (mask & BRDY0) {
1480 td = r8a66597_get_td(r8a66597, 0);
1481 if (td && td->type == USB_PID_IN)
1482 packet_read(r8a66597, 0);
1483 else
1484 pipe_irq_disable(r8a66597, 0);
1485 check_next_phase(r8a66597, 0);
1486 }
1487
1488 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1489 check = 1 << pipenum;
1490 if (mask & check) {
1491 td = r8a66597_get_td(r8a66597, pipenum);
1492 if (unlikely(!td))
1493 continue;
1494
1495 if (td->type == USB_PID_IN)
1496 packet_read(r8a66597, pipenum);
1497 else if (td->type == USB_PID_OUT)
1498 packet_write(r8a66597, pipenum);
1499 }
1500 }
1501 }
1502
1503 static void irq_pipe_empty(struct r8a66597 *r8a66597)
1504 {
1505 u16 tmp;
1506 u16 check;
1507 u16 pipenum;
1508 u16 mask;
1509 struct r8a66597_td *td;
1510
1511 mask = r8a66597_read(r8a66597, BEMPSTS)
1512 & r8a66597_read(r8a66597, BEMPENB);
1513 r8a66597_write(r8a66597, ~mask, BEMPSTS);
1514 if (mask & BEMP0) {
1515 cfifo_change(r8a66597, 0);
1516 td = r8a66597_get_td(r8a66597, 0);
1517 if (td && td->type != USB_PID_OUT)
1518 disable_irq_empty(r8a66597, 0);
1519 check_next_phase(r8a66597, 0);
1520 }
1521
1522 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1523 check = 1 << pipenum;
1524 if (mask & check) {
1525 struct r8a66597_td *td;
1526 td = r8a66597_get_td(r8a66597, pipenum);
1527 if (unlikely(!td))
1528 continue;
1529
1530 tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
1531 if ((tmp & INBUFM) == 0) {
1532 disable_irq_empty(r8a66597, pipenum);
1533 pipe_irq_disable(r8a66597, pipenum);
1534 finish_request(r8a66597, td, pipenum, td->urb,
1535 0);
1536 }
1537 }
1538 }
1539 }
1540
1541 static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
1542 {
1543 u16 check;
1544 u16 pipenum;
1545 u16 mask;
1546 int status;
1547
1548 mask = r8a66597_read(r8a66597, NRDYSTS)
1549 & r8a66597_read(r8a66597, NRDYENB);
1550 r8a66597_write(r8a66597, ~mask, NRDYSTS);
1551 if (mask & NRDY0) {
1552 cfifo_change(r8a66597, 0);
1553 status = get_urb_error(r8a66597, 0);
1554 pipe_irq_disable(r8a66597, 0);
1555 check_next_phase(r8a66597, status);
1556 }
1557
1558 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1559 check = 1 << pipenum;
1560 if (mask & check) {
1561 struct r8a66597_td *td;
1562 td = r8a66597_get_td(r8a66597, pipenum);
1563 if (unlikely(!td))
1564 continue;
1565
1566 status = get_urb_error(r8a66597, pipenum);
1567 pipe_irq_disable(r8a66597, pipenum);
1568 pipe_stop(r8a66597, td->pipe);
1569 finish_request(r8a66597, td, pipenum, td->urb, status);
1570 }
1571 }
1572 }
1573
1574 static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
1575 {
1576 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1577 u16 intsts0, intsts1, intsts2;
1578 u16 intenb0, intenb1, intenb2;
1579 u16 mask0, mask1, mask2;
1580 int status;
1581
1582 spin_lock(&r8a66597->lock);
1583
1584 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1585 intsts1 = r8a66597_read(r8a66597, INTSTS1);
1586 intsts2 = r8a66597_read(r8a66597, INTSTS2);
1587 intenb0 = r8a66597_read(r8a66597, INTENB0);
1588 intenb1 = r8a66597_read(r8a66597, INTENB1);
1589 intenb2 = r8a66597_read(r8a66597, INTENB2);
1590
1591 mask2 = intsts2 & intenb2;
1592 mask1 = intsts1 & intenb1;
1593 mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
1594 if (mask2) {
1595 if (mask2 & ATTCH) {
1596 r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
1597 r8a66597_bclr(r8a66597, ATTCHE, INTENB2);
1598
1599 /* start usb bus sampling */
1600 start_root_hub_sampling(r8a66597, 1, 1);
1601 }
1602 if (mask2 & DTCH) {
1603 r8a66597_write(r8a66597, ~DTCH, INTSTS2);
1604 r8a66597_bclr(r8a66597, DTCHE, INTENB2);
1605 r8a66597_usb_disconnect(r8a66597, 1);
1606 }
1607 }
1608
1609 if (mask1) {
1610 if (mask1 & ATTCH) {
1611 r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
1612 r8a66597_bclr(r8a66597, ATTCHE, INTENB1);
1613
1614 /* start usb bus sampling */
1615 start_root_hub_sampling(r8a66597, 0, 1);
1616 }
1617 if (mask1 & DTCH) {
1618 r8a66597_write(r8a66597, ~DTCH, INTSTS1);
1619 r8a66597_bclr(r8a66597, DTCHE, INTENB1);
1620 r8a66597_usb_disconnect(r8a66597, 0);
1621 }
1622 if (mask1 & SIGN) {
1623 r8a66597_write(r8a66597, ~SIGN, INTSTS1);
1624 status = get_urb_error(r8a66597, 0);
1625 check_next_phase(r8a66597, status);
1626 }
1627 if (mask1 & SACK) {
1628 r8a66597_write(r8a66597, ~SACK, INTSTS1);
1629 check_next_phase(r8a66597, 0);
1630 }
1631 }
1632 if (mask0) {
1633 if (mask0 & BRDY)
1634 irq_pipe_ready(r8a66597);
1635 if (mask0 & BEMP)
1636 irq_pipe_empty(r8a66597);
1637 if (mask0 & NRDY)
1638 irq_pipe_nrdy(r8a66597);
1639 }
1640
1641 spin_unlock(&r8a66597->lock);
1642 return IRQ_HANDLED;
1643 }
1644
1645 /* this function must be called with interrupt disabled */
1646 static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
1647 {
1648 u16 tmp;
1649 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1650
1651 if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
1652 unsigned long dvstctr_reg = get_dvstctr_reg(port);
1653
1654 tmp = r8a66597_read(r8a66597, dvstctr_reg);
1655 if ((tmp & USBRST) == USBRST) {
1656 r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
1657 dvstctr_reg);
1658 r8a66597_root_hub_start_polling(r8a66597);
1659 } else
1660 r8a66597_usb_connect(r8a66597, port);
1661 }
1662
1663 if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) {
1664 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
1665 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
1666 }
1667
1668 if (rh->scount > 0) {
1669 tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
1670 if (tmp == rh->old_syssts) {
1671 rh->scount--;
1672 if (rh->scount == 0)
1673 r8a66597_check_syssts(r8a66597, port, tmp);
1674 else
1675 r8a66597_root_hub_start_polling(r8a66597);
1676 } else {
1677 rh->scount = R8A66597_MAX_SAMPLING;
1678 rh->old_syssts = tmp;
1679 r8a66597_root_hub_start_polling(r8a66597);
1680 }
1681 }
1682 }
1683
1684 static void r8a66597_interval_timer(unsigned long _r8a66597)
1685 {
1686 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1687 unsigned long flags;
1688 u16 pipenum;
1689 struct r8a66597_td *td;
1690
1691 spin_lock_irqsave(&r8a66597->lock, flags);
1692
1693 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1694 if (!(r8a66597->interval_map & (1 << pipenum)))
1695 continue;
1696 if (timer_pending(&r8a66597->interval_timer[pipenum]))
1697 continue;
1698
1699 td = r8a66597_get_td(r8a66597, pipenum);
1700 if (td)
1701 start_transfer(r8a66597, td);
1702 }
1703
1704 spin_unlock_irqrestore(&r8a66597->lock, flags);
1705 }
1706
1707 static void r8a66597_td_timer(unsigned long _r8a66597)
1708 {
1709 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1710 unsigned long flags;
1711 u16 pipenum;
1712 struct r8a66597_td *td, *new_td = NULL;
1713 struct r8a66597_pipe *pipe;
1714
1715 spin_lock_irqsave(&r8a66597->lock, flags);
1716 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1717 if (!(r8a66597->timeout_map & (1 << pipenum)))
1718 continue;
1719 if (timer_pending(&r8a66597->td_timer[pipenum]))
1720 continue;
1721
1722 td = r8a66597_get_td(r8a66597, pipenum);
1723 if (!td) {
1724 r8a66597->timeout_map &= ~(1 << pipenum);
1725 continue;
1726 }
1727
1728 if (td->urb->actual_length) {
1729 set_td_timer(r8a66597, td);
1730 break;
1731 }
1732
1733 pipe = td->pipe;
1734 pipe_stop(r8a66597, pipe);
1735
1736 new_td = td;
1737 do {
1738 list_move_tail(&new_td->queue,
1739 &r8a66597->pipe_queue[pipenum]);
1740 new_td = r8a66597_get_td(r8a66597, pipenum);
1741 if (!new_td) {
1742 new_td = td;
1743 break;
1744 }
1745 } while (td != new_td && td->address == new_td->address);
1746
1747 start_transfer(r8a66597, new_td);
1748
1749 if (td == new_td)
1750 r8a66597->timeout_map &= ~(1 << pipenum);
1751 else
1752 set_td_timer(r8a66597, new_td);
1753 break;
1754 }
1755 spin_unlock_irqrestore(&r8a66597->lock, flags);
1756 }
1757
1758 static void r8a66597_timer(unsigned long _r8a66597)
1759 {
1760 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1761 unsigned long flags;
1762
1763 spin_lock_irqsave(&r8a66597->lock, flags);
1764
1765 r8a66597_root_hub_control(r8a66597, 0);
1766 r8a66597_root_hub_control(r8a66597, 1);
1767
1768 spin_unlock_irqrestore(&r8a66597->lock, flags);
1769 }
1770
1771 static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
1772 {
1773 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
1774
1775 if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
1776 (urb->dev->state == USB_STATE_CONFIGURED))
1777 return 1;
1778 else
1779 return 0;
1780 }
1781
1782 static int r8a66597_start(struct usb_hcd *hcd)
1783 {
1784 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1785
1786 hcd->state = HC_STATE_RUNNING;
1787 return enable_controller(r8a66597);
1788 }
1789
1790 static void r8a66597_stop(struct usb_hcd *hcd)
1791 {
1792 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1793
1794 disable_controller(r8a66597);
1795 }
1796
1797 static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
1798 {
1799 unsigned int usb_address = usb_pipedevice(urb->pipe);
1800 u16 root_port, hub_port;
1801
1802 if (usb_address == 0) {
1803 get_port_number(urb->dev->devpath,
1804 &root_port, &hub_port);
1805 set_devadd_reg(r8a66597, 0,
1806 get_r8a66597_usb_speed(urb->dev->speed),
1807 get_parent_r8a66597_address(r8a66597, urb->dev),
1808 hub_port, root_port);
1809 }
1810 }
1811
1812 static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
1813 struct urb *urb,
1814 struct usb_host_endpoint *hep)
1815 {
1816 struct r8a66597_td *td;
1817 u16 pipenum;
1818
1819 td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
1820 if (td == NULL)
1821 return NULL;
1822
1823 pipenum = r8a66597_get_pipenum(urb, hep);
1824 td->pipenum = pipenum;
1825 td->pipe = hep->hcpriv;
1826 td->urb = urb;
1827 td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
1828 td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
1829 !usb_pipein(urb->pipe));
1830 if (usb_pipecontrol(urb->pipe))
1831 td->type = USB_PID_SETUP;
1832 else if (usb_pipein(urb->pipe))
1833 td->type = USB_PID_IN;
1834 else
1835 td->type = USB_PID_OUT;
1836 INIT_LIST_HEAD(&td->queue);
1837
1838 return td;
1839 }
1840
1841 static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
1842 struct urb *urb,
1843 gfp_t mem_flags)
1844 {
1845 struct usb_host_endpoint *hep = urb->ep;
1846 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1847 struct r8a66597_td *td = NULL;
1848 int ret, request = 0;
1849 unsigned long flags;
1850
1851 spin_lock_irqsave(&r8a66597->lock, flags);
1852 if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
1853 ret = -ENODEV;
1854 goto error_not_linked;
1855 }
1856
1857 ret = usb_hcd_link_urb_to_ep(hcd, urb);
1858 if (ret)
1859 goto error_not_linked;
1860
1861 if (!hep->hcpriv) {
1862 hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
1863 GFP_ATOMIC);
1864 if (!hep->hcpriv) {
1865 ret = -ENOMEM;
1866 goto error;
1867 }
1868 set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
1869 if (usb_pipeendpoint(urb->pipe))
1870 init_pipe_info(r8a66597, urb, hep, &hep->desc);
1871 }
1872
1873 if (unlikely(check_pipe_config(r8a66597, urb)))
1874 init_pipe_config(r8a66597, urb);
1875
1876 set_address_zero(r8a66597, urb);
1877 td = r8a66597_make_td(r8a66597, urb, hep);
1878 if (td == NULL) {
1879 ret = -ENOMEM;
1880 goto error;
1881 }
1882 if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
1883 request = 1;
1884 list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
1885 urb->hcpriv = td;
1886
1887 if (request) {
1888 if (td->pipe->info.timer_interval) {
1889 r8a66597->interval_map |= 1 << td->pipenum;
1890 mod_timer(&r8a66597->interval_timer[td->pipenum],
1891 jiffies + msecs_to_jiffies(
1892 td->pipe->info.timer_interval));
1893 } else {
1894 ret = start_transfer(r8a66597, td);
1895 if (ret < 0) {
1896 list_del(&td->queue);
1897 kfree(td);
1898 }
1899 }
1900 } else
1901 set_td_timer(r8a66597, td);
1902
1903 error:
1904 if (ret)
1905 usb_hcd_unlink_urb_from_ep(hcd, urb);
1906 error_not_linked:
1907 spin_unlock_irqrestore(&r8a66597->lock, flags);
1908 return ret;
1909 }
1910
1911 static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1912 int status)
1913 {
1914 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1915 struct r8a66597_td *td;
1916 unsigned long flags;
1917 int rc;
1918
1919 spin_lock_irqsave(&r8a66597->lock, flags);
1920 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1921 if (rc)
1922 goto done;
1923
1924 if (urb->hcpriv) {
1925 td = urb->hcpriv;
1926 pipe_stop(r8a66597, td->pipe);
1927 pipe_irq_disable(r8a66597, td->pipenum);
1928 disable_irq_empty(r8a66597, td->pipenum);
1929 finish_request(r8a66597, td, td->pipenum, urb, status);
1930 }
1931 done:
1932 spin_unlock_irqrestore(&r8a66597->lock, flags);
1933 return rc;
1934 }
1935
1936 static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
1937 struct usb_host_endpoint *hep)
1938 {
1939 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1940 struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
1941 struct r8a66597_td *td;
1942 struct urb *urb = NULL;
1943 u16 pipenum;
1944 unsigned long flags;
1945
1946 if (pipe == NULL)
1947 return;
1948 pipenum = pipe->info.pipenum;
1949
1950 if (pipenum == 0) {
1951 kfree(hep->hcpriv);
1952 hep->hcpriv = NULL;
1953 return;
1954 }
1955
1956 spin_lock_irqsave(&r8a66597->lock, flags);
1957 pipe_stop(r8a66597, pipe);
1958 pipe_irq_disable(r8a66597, pipenum);
1959 disable_irq_empty(r8a66597, pipenum);
1960 td = r8a66597_get_td(r8a66597, pipenum);
1961 if (td)
1962 urb = td->urb;
1963 finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
1964 kfree(hep->hcpriv);
1965 hep->hcpriv = NULL;
1966 spin_unlock_irqrestore(&r8a66597->lock, flags);
1967 }
1968
1969 static int r8a66597_get_frame(struct usb_hcd *hcd)
1970 {
1971 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1972 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1973 }
1974
1975 static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
1976 {
1977 int chix;
1978
1979 if (udev->state == USB_STATE_CONFIGURED &&
1980 udev->parent && udev->parent->devnum > 1 &&
1981 udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
1982 map[udev->devnum/32] |= (1 << (udev->devnum % 32));
1983
1984 for (chix = 0; chix < udev->maxchild; chix++) {
1985 struct usb_device *childdev = udev->children[chix];
1986
1987 if (childdev)
1988 collect_usb_address_map(childdev, map);
1989 }
1990 }
1991
1992 /* this function must be called with interrupt disabled */
1993 static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
1994 int addr)
1995 {
1996 struct r8a66597_device *dev;
1997 struct list_head *list = &r8a66597->child_device;
1998
1999 list_for_each_entry(dev, list, device_list) {
2000 if (!dev)
2001 continue;
2002 if (dev->usb_address != addr)
2003 continue;
2004
2005 return dev;
2006 }
2007
2008 err("get_r8a66597_device fail.(%d)\n", addr);
2009 return NULL;
2010 }
2011
2012 static void update_usb_address_map(struct r8a66597 *r8a66597,
2013 struct usb_device *root_hub,
2014 unsigned long *map)
2015 {
2016 int i, j, addr;
2017 unsigned long diff;
2018 unsigned long flags;
2019
2020 for (i = 0; i < 4; i++) {
2021 diff = r8a66597->child_connect_map[i] ^ map[i];
2022 if (!diff)
2023 continue;
2024
2025 for (j = 0; j < 32; j++) {
2026 if (!(diff & (1 << j)))
2027 continue;
2028
2029 addr = i * 32 + j;
2030 if (map[i] & (1 << j))
2031 set_child_connect_map(r8a66597, addr);
2032 else {
2033 struct r8a66597_device *dev;
2034
2035 spin_lock_irqsave(&r8a66597->lock, flags);
2036 dev = get_r8a66597_device(r8a66597, addr);
2037 disable_r8a66597_pipe_all(r8a66597, dev);
2038 free_usb_address(r8a66597, dev);
2039 put_child_connect_map(r8a66597, addr);
2040 spin_unlock_irqrestore(&r8a66597->lock, flags);
2041 }
2042 }
2043 }
2044 }
2045
2046 static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
2047 struct usb_hcd *hcd)
2048 {
2049 struct usb_bus *bus;
2050 unsigned long now_map[4];
2051
2052 memset(now_map, 0, sizeof(now_map));
2053
2054 list_for_each_entry(bus, &usb_bus_list, bus_list) {
2055 if (!bus->root_hub)
2056 continue;
2057
2058 if (bus->busnum != hcd->self.busnum)
2059 continue;
2060
2061 collect_usb_address_map(bus->root_hub, now_map);
2062 update_usb_address_map(r8a66597, bus->root_hub, now_map);
2063 }
2064 }
2065
2066 static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
2067 {
2068 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2069 unsigned long flags;
2070 int i;
2071
2072 r8a66597_check_detect_child(r8a66597, hcd);
2073
2074 spin_lock_irqsave(&r8a66597->lock, flags);
2075
2076 *buf = 0; /* initialize (no change) */
2077
2078 for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
2079 if (r8a66597->root_hub[i].port & 0xffff0000)
2080 *buf |= 1 << (i + 1);
2081 }
2082
2083 spin_unlock_irqrestore(&r8a66597->lock, flags);
2084
2085 return (*buf != 0);
2086 }
2087
2088 static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
2089 struct usb_hub_descriptor *desc)
2090 {
2091 desc->bDescriptorType = 0x29;
2092 desc->bHubContrCurrent = 0;
2093 desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
2094 desc->bDescLength = 9;
2095 desc->bPwrOn2PwrGood = 0;
2096 desc->wHubCharacteristics = cpu_to_le16(0x0011);
2097 desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
2098 desc->bitmap[1] = ~0;
2099 }
2100
2101 static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
2102 u16 wIndex, char *buf, u16 wLength)
2103 {
2104 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2105 int ret;
2106 int port = (wIndex & 0x00FF) - 1;
2107 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2108 unsigned long flags;
2109
2110 ret = 0;
2111
2112 spin_lock_irqsave(&r8a66597->lock, flags);
2113 switch (typeReq) {
2114 case ClearHubFeature:
2115 case SetHubFeature:
2116 switch (wValue) {
2117 case C_HUB_OVER_CURRENT:
2118 case C_HUB_LOCAL_POWER:
2119 break;
2120 default:
2121 goto error;
2122 }
2123 break;
2124 case ClearPortFeature:
2125 if (wIndex > R8A66597_MAX_ROOT_HUB)
2126 goto error;
2127 if (wLength != 0)
2128 goto error;
2129
2130 switch (wValue) {
2131 case USB_PORT_FEAT_ENABLE:
2132 rh->port &= (1 << USB_PORT_FEAT_POWER);
2133 break;
2134 case USB_PORT_FEAT_SUSPEND:
2135 break;
2136 case USB_PORT_FEAT_POWER:
2137 r8a66597_port_power(r8a66597, port, 0);
2138 break;
2139 case USB_PORT_FEAT_C_ENABLE:
2140 case USB_PORT_FEAT_C_SUSPEND:
2141 case USB_PORT_FEAT_C_CONNECTION:
2142 case USB_PORT_FEAT_C_OVER_CURRENT:
2143 case USB_PORT_FEAT_C_RESET:
2144 break;
2145 default:
2146 goto error;
2147 }
2148 rh->port &= ~(1 << wValue);
2149 break;
2150 case GetHubDescriptor:
2151 r8a66597_hub_descriptor(r8a66597,
2152 (struct usb_hub_descriptor *)buf);
2153 break;
2154 case GetHubStatus:
2155 *buf = 0x00;
2156 break;
2157 case GetPortStatus:
2158 if (wIndex > R8A66597_MAX_ROOT_HUB)
2159 goto error;
2160 *(__le32 *)buf = cpu_to_le32(rh->port);
2161 break;
2162 case SetPortFeature:
2163 if (wIndex > R8A66597_MAX_ROOT_HUB)
2164 goto error;
2165 if (wLength != 0)
2166 goto error;
2167
2168 switch (wValue) {
2169 case USB_PORT_FEAT_SUSPEND:
2170 break;
2171 case USB_PORT_FEAT_POWER:
2172 r8a66597_port_power(r8a66597, port, 1);
2173 rh->port |= (1 << USB_PORT_FEAT_POWER);
2174 break;
2175 case USB_PORT_FEAT_RESET: {
2176 struct r8a66597_device *dev = rh->dev;
2177
2178 rh->port |= (1 << USB_PORT_FEAT_RESET);
2179
2180 disable_r8a66597_pipe_all(r8a66597, dev);
2181 free_usb_address(r8a66597, dev);
2182
2183 r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
2184 get_dvstctr_reg(port));
2185 mod_timer(&r8a66597->rh_timer,
2186 jiffies + msecs_to_jiffies(50));
2187 }
2188 break;
2189 default:
2190 goto error;
2191 }
2192 rh->port |= 1 << wValue;
2193 break;
2194 default:
2195 error:
2196 ret = -EPIPE;
2197 break;
2198 }
2199
2200 spin_unlock_irqrestore(&r8a66597->lock, flags);
2201 return ret;
2202 }
2203
2204 static struct hc_driver r8a66597_hc_driver = {
2205 .description = hcd_name,
2206 .hcd_priv_size = sizeof(struct r8a66597),
2207 .irq = r8a66597_irq,
2208
2209 /*
2210 * generic hardware linkage
2211 */
2212 .flags = HCD_USB2,
2213
2214 .start = r8a66597_start,
2215 .stop = r8a66597_stop,
2216
2217 /*
2218 * managing i/o requests and associated device resources
2219 */
2220 .urb_enqueue = r8a66597_urb_enqueue,
2221 .urb_dequeue = r8a66597_urb_dequeue,
2222 .endpoint_disable = r8a66597_endpoint_disable,
2223
2224 /*
2225 * periodic schedule support
2226 */
2227 .get_frame_number = r8a66597_get_frame,
2228
2229 /*
2230 * root hub support
2231 */
2232 .hub_status_data = r8a66597_hub_status_data,
2233 .hub_control = r8a66597_hub_control,
2234 };
2235
2236 #if defined(CONFIG_PM)
2237 static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state)
2238 {
2239 return 0;
2240 }
2241
2242 static int r8a66597_resume(struct platform_device *pdev)
2243 {
2244 return 0;
2245 }
2246 #else /* if defined(CONFIG_PM) */
2247 #define r8a66597_suspend NULL
2248 #define r8a66597_resume NULL
2249 #endif
2250
2251 static int __init_or_module r8a66597_remove(struct platform_device *pdev)
2252 {
2253 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
2254 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
2255
2256 del_timer_sync(&r8a66597->rh_timer);
2257 usb_remove_hcd(hcd);
2258 iounmap((void *)r8a66597->reg);
2259 usb_put_hcd(hcd);
2260 return 0;
2261 }
2262
2263 #define resource_len(r) (((r)->end - (r)->start) + 1)
2264 static int __init r8a66597_probe(struct platform_device *pdev)
2265 {
2266 struct resource *res = NULL;
2267 int irq = -1;
2268 void __iomem *reg = NULL;
2269 struct usb_hcd *hcd = NULL;
2270 struct r8a66597 *r8a66597;
2271 int ret = 0;
2272 int i;
2273 unsigned long irq_trigger;
2274
2275 if (pdev->dev.dma_mask) {
2276 ret = -EINVAL;
2277 err("dma not support");
2278 goto clean_up;
2279 }
2280
2281 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2282 (char *)hcd_name);
2283 if (!res) {
2284 ret = -ENODEV;
2285 err("platform_get_resource_byname error.");
2286 goto clean_up;
2287 }
2288
2289 irq = platform_get_irq(pdev, 0);
2290 if (irq < 0) {
2291 ret = -ENODEV;
2292 err("platform_get_irq error.");
2293 goto clean_up;
2294 }
2295
2296 reg = ioremap(res->start, resource_len(res));
2297 if (reg == NULL) {
2298 ret = -ENOMEM;
2299 err("ioremap error.");
2300 goto clean_up;
2301 }
2302
2303 /* initialize hcd */
2304 hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
2305 if (!hcd) {
2306 ret = -ENOMEM;
2307 err("Failed to create hcd");
2308 goto clean_up;
2309 }
2310 r8a66597 = hcd_to_r8a66597(hcd);
2311 memset(r8a66597, 0, sizeof(struct r8a66597));
2312 dev_set_drvdata(&pdev->dev, r8a66597);
2313
2314 spin_lock_init(&r8a66597->lock);
2315 init_timer(&r8a66597->rh_timer);
2316 r8a66597->rh_timer.function = r8a66597_timer;
2317 r8a66597->rh_timer.data = (unsigned long)r8a66597;
2318 r8a66597->reg = (unsigned long)reg;
2319
2320 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
2321 INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
2322 init_timer(&r8a66597->td_timer[i]);
2323 r8a66597->td_timer[i].function = r8a66597_td_timer;
2324 r8a66597->td_timer[i].data = (unsigned long)r8a66597;
2325 setup_timer(&r8a66597->interval_timer[i],
2326 r8a66597_interval_timer,
2327 (unsigned long)r8a66597);
2328 }
2329 INIT_LIST_HEAD(&r8a66597->child_device);
2330
2331 hcd->rsrc_start = res->start;
2332 if (irq_sense == INTL)
2333 irq_trigger = IRQF_TRIGGER_LOW;
2334 else
2335 irq_trigger = IRQF_TRIGGER_FALLING;
2336 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | irq_trigger);
2337 if (ret != 0) {
2338 err("Failed to add hcd");
2339 goto clean_up;
2340 }
2341
2342 return 0;
2343
2344 clean_up:
2345 if (reg)
2346 iounmap(reg);
2347
2348 return ret;
2349 }
2350
2351 static struct platform_driver r8a66597_driver = {
2352 .probe = r8a66597_probe,
2353 .remove = r8a66597_remove,
2354 .suspend = r8a66597_suspend,
2355 .resume = r8a66597_resume,
2356 .driver = {
2357 .name = (char *) hcd_name,
2358 .owner = THIS_MODULE,
2359 },
2360 };
2361
2362 static int __init r8a66597_init(void)
2363 {
2364 if (usb_disabled())
2365 return -ENODEV;
2366
2367 info("driver %s, %s", hcd_name, DRIVER_VERSION);
2368 return platform_driver_register(&r8a66597_driver);
2369 }
2370 module_init(r8a66597_init);
2371
2372 static void __exit r8a66597_cleanup(void)
2373 {
2374 platform_driver_unregister(&r8a66597_driver);
2375 }
2376 module_exit(r8a66597_cleanup);
2377
Support for the Chinese Samsung S3C2440 based development boards