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virtio_blk: don't bounce highmem requests
[linux-2.6/mini2440.git] / drivers / usb / host / r8a66597-hcd.c
blobf1626e58c141ff207fac18c57d3ce58212f86b72
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 = 0xff;
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 #if defined(CONFIG_HAVE_CLK)
118 clk_enable(r8a66597->clk);
119 #endif
120 do {
121 r8a66597_write(r8a66597, SCKE, SYSCFG0);
122 tmp = r8a66597_read(r8a66597, SYSCFG0);
123 if (i++ > 1000) {
124 printk(KERN_ERR "r8a66597: register access fail.\n");
125 return -ENXIO;
126 }
127 } while ((tmp & SCKE) != SCKE);
128 r8a66597_write(r8a66597, 0x04, 0x02);
129 #else
130 do {
131 r8a66597_write(r8a66597, USBE, SYSCFG0);
132 tmp = r8a66597_read(r8a66597, SYSCFG0);
133 if (i++ > 1000) {
134 printk(KERN_ERR "r8a66597: register access fail.\n");
135 return -ENXIO;
136 }
137 } while ((tmp & USBE) != USBE);
138 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
139 r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0);
140
141 i = 0;
142 r8a66597_bset(r8a66597, XCKE, SYSCFG0);
143 do {
144 msleep(1);
145 tmp = r8a66597_read(r8a66597, SYSCFG0);
146 if (i++ > 500) {
147 printk(KERN_ERR "r8a66597: register access fail.\n");
148 return -ENXIO;
149 }
150 } while ((tmp & SCKE) != SCKE);
151 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
152
153 return 0;
154 }
155
156 static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
157 {
158 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
159 udelay(1);
160 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
161 #if defined(CONFIG_HAVE_CLK)
162 clk_disable(r8a66597->clk);
163 #endif
164 #else
165 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
166 r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
167 r8a66597_bclr(r8a66597, USBE, SYSCFG0);
168 #endif
169 }
170
171 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
172 {
173 u16 val;
174
175 val = port ? DRPD : DCFM | DRPD;
176 r8a66597_bset(r8a66597, val, get_syscfg_reg(port));
177 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
178
179 r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, get_dmacfg_reg(port));
180 r8a66597_bclr(r8a66597, DTCHE, get_intenb_reg(port));
181 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
182 }
183
184 static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port)
185 {
186 u16 val, tmp;
187
188 r8a66597_write(r8a66597, 0, get_intenb_reg(port));
189 r8a66597_write(r8a66597, 0, get_intsts_reg(port));
190
191 r8a66597_port_power(r8a66597, port, 0);
192
193 do {
194 tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
195 udelay(640);
196 } while (tmp == EDGESTS);
197
198 val = port ? DRPD : DCFM | DRPD;
199 r8a66597_bclr(r8a66597, val, get_syscfg_reg(port));
200 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
201 }
202
203 static int enable_controller(struct r8a66597 *r8a66597)
204 {
205 int ret, port;
206
207 ret = r8a66597_clock_enable(r8a66597);
208 if (ret < 0)
209 return ret;
210
211 r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
212 r8a66597_bset(r8a66597, USBE, SYSCFG0);
213
214 r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
215 r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
216 r8a66597_bset(r8a66597, BRDY0, BRDYENB);
217 r8a66597_bset(r8a66597, BEMP0, BEMPENB);
218
219 r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
220 r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
221 r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);
222 r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);
223
224 r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
225
226 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
227 r8a66597_enable_port(r8a66597, port);
228
229 return 0;
230 }
231
232 static void disable_controller(struct r8a66597 *r8a66597)
233 {
234 int port;
235
236 r8a66597_write(r8a66597, 0, INTENB0);
237 r8a66597_write(r8a66597, 0, INTSTS0);
238
239 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
240 r8a66597_disable_port(r8a66597, port);
241
242 r8a66597_clock_disable(r8a66597);
243 }
244
245 static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
246 struct usb_device *udev)
247 {
248 struct r8a66597_device *dev;
249
250 if (udev->parent && udev->parent->devnum != 1)
251 udev = udev->parent;
252
253 dev = dev_get_drvdata(&udev->dev);
254 if (dev)
255 return dev->address;
256 else
257 return 0;
258 }
259
260 static int is_child_device(char *devpath)
261 {
262 return (devpath[2] ? 1 : 0);
263 }
264
265 static int is_hub_limit(char *devpath)
266 {
267 return ((strlen(devpath) >= 4) ? 1 : 0);
268 }
269
270 static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
271 {
272 if (root_port) {
273 *root_port = (devpath[0] & 0x0F) - 1;
274 if (*root_port >= R8A66597_MAX_ROOT_HUB)
275 printk(KERN_ERR "r8a66597: Illegal root port number.\n");
276 }
277 if (hub_port)
278 *hub_port = devpath[2] & 0x0F;
279 }
280
281 static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
282 {
283 u16 usbspd = 0;
284
285 switch (speed) {
286 case USB_SPEED_LOW:
287 usbspd = LSMODE;
288 break;
289 case USB_SPEED_FULL:
290 usbspd = FSMODE;
291 break;
292 case USB_SPEED_HIGH:
293 usbspd = HSMODE;
294 break;
295 default:
296 printk(KERN_ERR "r8a66597: unknown speed\n");
297 break;
298 }
299
300 return usbspd;
301 }
302
303 static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
304 {
305 int idx;
306
307 idx = address / 32;
308 r8a66597->child_connect_map[idx] |= 1 << (address % 32);
309 }
310
311 static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
312 {
313 int idx;
314
315 idx = address / 32;
316 r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
317 }
318
319 static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
320 {
321 u16 pipenum = pipe->info.pipenum;
322 const unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
323 const unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
324 const unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};
325
326 if (dma_ch > R8A66597_PIPE_NO_DMA) /* dma fifo not use? */
327 dma_ch = R8A66597_PIPE_NO_DMA;
328
329 pipe->fifoaddr = fifoaddr[dma_ch];
330 pipe->fifosel = fifosel[dma_ch];
331 pipe->fifoctr = fifoctr[dma_ch];
332
333 if (pipenum == 0)
334 pipe->pipectr = DCPCTR;
335 else
336 pipe->pipectr = get_pipectr_addr(pipenum);
337
338 if (check_bulk_or_isoc(pipenum)) {
339 pipe->pipetre = get_pipetre_addr(pipenum);
340 pipe->pipetrn = get_pipetrn_addr(pipenum);
341 } else {
342 pipe->pipetre = 0;
343 pipe->pipetrn = 0;
344 }
345 }
346
347 static struct r8a66597_device *
348 get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
349 {
350 if (usb_pipedevice(urb->pipe) == 0)
351 return &r8a66597->device0;
352
353 return dev_get_drvdata(&urb->dev->dev);
354 }
355
356 static int make_r8a66597_device(struct r8a66597 *r8a66597,
357 struct urb *urb, u8 addr)
358 {
359 struct r8a66597_device *dev;
360 int usb_address = urb->setup_packet[2]; /* urb->pipe is address 0 */
361
362 dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
363 if (dev == NULL)
364 return -ENOMEM;
365
366 dev_set_drvdata(&urb->dev->dev, dev);
367 dev->udev = urb->dev;
368 dev->address = addr;
369 dev->usb_address = usb_address;
370 dev->state = USB_STATE_ADDRESS;
371 dev->ep_in_toggle = 0;
372 dev->ep_out_toggle = 0;
373 INIT_LIST_HEAD(&dev->device_list);
374 list_add_tail(&dev->device_list, &r8a66597->child_device);
375
376 get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
377 if (!is_child_device(urb->dev->devpath))
378 r8a66597->root_hub[dev->root_port].dev = dev;
379
380 set_devadd_reg(r8a66597, dev->address,
381 get_r8a66597_usb_speed(urb->dev->speed),
382 get_parent_r8a66597_address(r8a66597, urb->dev),
383 dev->hub_port, dev->root_port);
384
385 return 0;
386 }
387
388 /* this function must be called with interrupt disabled */
389 static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
390 {
391 u8 addr; /* R8A66597's address */
392 struct r8a66597_device *dev;
393
394 if (is_hub_limit(urb->dev->devpath)) {
395 dev_err(&urb->dev->dev, "External hub limit reached.\n");
396 return 0;
397 }
398
399 dev = get_urb_to_r8a66597_dev(r8a66597, urb);
400 if (dev && dev->state >= USB_STATE_ADDRESS)
401 return dev->address;
402
403 for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
404 if (r8a66597->address_map & (1 << addr))
405 continue;
406
407 dbg("alloc_address: r8a66597_addr=%d", addr);
408 r8a66597->address_map |= 1 << addr;
409
410 if (make_r8a66597_device(r8a66597, urb, addr) < 0)
411 return 0;
412
413 return addr;
414 }
415
416 dev_err(&urb->dev->dev,
417 "cannot communicate with a USB device more than 10.(%x)\n",
418 r8a66597->address_map);
419
420 return 0;
421 }
422
423 /* this function must be called with interrupt disabled */
424 static void free_usb_address(struct r8a66597 *r8a66597,
425 struct r8a66597_device *dev)
426 {
427 int port;
428
429 if (!dev)
430 return;
431
432 dbg("free_addr: addr=%d", dev->address);
433
434 dev->state = USB_STATE_DEFAULT;
435 r8a66597->address_map &= ~(1 << dev->address);
436 dev->address = 0;
437 dev_set_drvdata(&dev->udev->dev, NULL);
438 list_del(&dev->device_list);
439 kfree(dev);
440
441 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
442 if (r8a66597->root_hub[port].dev == dev) {
443 r8a66597->root_hub[port].dev = NULL;
444 break;
445 }
446 }
447 }
448
449 static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
450 u16 mask, u16 loop)
451 {
452 u16 tmp;
453 int i = 0;
454
455 do {
456 tmp = r8a66597_read(r8a66597, reg);
457 if (i++ > 1000000) {
458 printk(KERN_ERR "r8a66597: register%lx, loop %x "
459 "is timeout\n", reg, loop);
460 break;
461 }
462 ndelay(1);
463 } while ((tmp & mask) != loop);
464 }
465
466 /* this function must be called with interrupt disabled */
467 static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
468 {
469 u16 tmp;
470
471 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
472 if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
473 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
474 r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
475 }
476
477 /* this function must be called with interrupt disabled */
478 static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
479 {
480 u16 tmp;
481
482 tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
483 if ((tmp & PID_STALL11) != PID_STALL11) /* force stall? */
484 r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
485 r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
486 r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
487 }
488
489 /* this function must be called with interrupt disabled */
490 static void clear_all_buffer(struct r8a66597 *r8a66597,
491 struct r8a66597_pipe *pipe)
492 {
493 u16 tmp;
494
495 if (!pipe || pipe->info.pipenum == 0)
496 return;
497
498 pipe_stop(r8a66597, pipe);
499 r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
500 tmp = r8a66597_read(r8a66597, pipe->pipectr);
501 tmp = r8a66597_read(r8a66597, pipe->pipectr);
502 tmp = r8a66597_read(r8a66597, pipe->pipectr);
503 r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
504 }
505
506 /* this function must be called with interrupt disabled */
507 static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
508 struct r8a66597_pipe *pipe, int toggle)
509 {
510 if (toggle)
511 r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
512 else
513 r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
514 }
515
516 /* this function must be called with interrupt disabled */
517 static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
518 {
519 r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
520 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
521 }
522
523 /* this function must be called with interrupt disabled */
524 static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
525 struct r8a66597_pipe *pipe)
526 {
527 cfifo_change(r8a66597, 0);
528 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
529 r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);
530
531 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
532 pipe->fifosel);
533 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
534 }
535
536 static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
537 {
538 struct r8a66597_pipe *pipe = hep->hcpriv;
539
540 if (usb_pipeendpoint(urb->pipe) == 0)
541 return 0;
542 else
543 return pipe->info.pipenum;
544 }
545
546 static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
547 {
548 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
549
550 return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
551 }
552
553 static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
554 int urb_pipe)
555 {
556 if (!dev)
557 return NULL;
558
559 return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
560 }
561
562 /* this function must be called with interrupt disabled */
563 static void pipe_toggle_set(struct r8a66597 *r8a66597,
564 struct r8a66597_pipe *pipe,
565 struct urb *urb, int set)
566 {
567 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
568 unsigned char endpoint = usb_pipeendpoint(urb->pipe);
569 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
570
571 if (!toggle)
572 return;
573
574 if (set)
575 *toggle |= 1 << endpoint;
576 else
577 *toggle &= ~(1 << endpoint);
578 }
579
580 /* this function must be called with interrupt disabled */
581 static void pipe_toggle_save(struct r8a66597 *r8a66597,
582 struct r8a66597_pipe *pipe,
583 struct urb *urb)
584 {
585 if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
586 pipe_toggle_set(r8a66597, pipe, urb, 1);
587 else
588 pipe_toggle_set(r8a66597, pipe, urb, 0);
589 }
590
591 /* this function must be called with interrupt disabled */
592 static void pipe_toggle_restore(struct r8a66597 *r8a66597,
593 struct r8a66597_pipe *pipe,
594 struct urb *urb)
595 {
596 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
597 unsigned char endpoint = usb_pipeendpoint(urb->pipe);
598 unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
599
600 if (!toggle)
601 return;
602
603 r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
604 }
605
606 /* this function must be called with interrupt disabled */
607 static void pipe_buffer_setting(struct r8a66597 *r8a66597,
608 struct r8a66597_pipe_info *info)
609 {
610 u16 val = 0;
611
612 if (info->pipenum == 0)
613 return;
614
615 r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
616 r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
617 r8a66597_write(r8a66597, info->pipenum, PIPESEL);
618 if (!info->dir_in)
619 val |= R8A66597_DIR;
620 if (info->type == R8A66597_BULK && info->dir_in)
621 val |= R8A66597_DBLB | R8A66597_SHTNAK;
622 val |= info->type | info->epnum;
623 r8a66597_write(r8a66597, val, PIPECFG);
624
625 r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
626 PIPEBUF);
627 r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
628 PIPEMAXP);
629 r8a66597_write(r8a66597, info->interval, PIPEPERI);
630 }
631
632 /* this function must be called with interrupt disabled */
633 static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
634 {
635 struct r8a66597_pipe_info *info;
636 struct urb *urb = td->urb;
637
638 if (td->pipenum > 0) {
639 info = &td->pipe->info;
640 cfifo_change(r8a66597, 0);
641 pipe_buffer_setting(r8a66597, info);
642
643 if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
644 usb_pipeout(urb->pipe)) &&
645 !usb_pipecontrol(urb->pipe)) {
646 r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
647 pipe_toggle_set(r8a66597, td->pipe, urb, 0);
648 clear_all_buffer(r8a66597, td->pipe);
649 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
650 usb_pipeout(urb->pipe), 1);
651 }
652 pipe_toggle_restore(r8a66597, td->pipe, urb);
653 }
654 }
655
656 /* this function must be called with interrupt disabled */
657 static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
658 struct usb_endpoint_descriptor *ep)
659 {
660 u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;
661
662 memset(array, 0, sizeof(array));
663 switch (usb_endpoint_type(ep)) {
664 case USB_ENDPOINT_XFER_BULK:
665 if (usb_endpoint_dir_in(ep))
666 array[i++] = 4;
667 else {
668 array[i++] = 3;
669 array[i++] = 5;
670 }
671 break;
672 case USB_ENDPOINT_XFER_INT:
673 if (usb_endpoint_dir_in(ep)) {
674 array[i++] = 6;
675 array[i++] = 7;
676 array[i++] = 8;
677 } else
678 array[i++] = 9;
679 break;
680 case USB_ENDPOINT_XFER_ISOC:
681 if (usb_endpoint_dir_in(ep))
682 array[i++] = 2;
683 else
684 array[i++] = 1;
685 break;
686 default:
687 printk(KERN_ERR "r8a66597: Illegal type\n");
688 return 0;
689 }
690
691 i = 1;
692 min = array[0];
693 while (array[i] != 0) {
694 if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
695 min = array[i];
696 i++;
697 }
698
699 return min;
700 }
701
702 static u16 get_r8a66597_type(__u8 type)
703 {
704 u16 r8a66597_type;
705
706 switch (type) {
707 case USB_ENDPOINT_XFER_BULK:
708 r8a66597_type = R8A66597_BULK;
709 break;
710 case USB_ENDPOINT_XFER_INT:
711 r8a66597_type = R8A66597_INT;
712 break;
713 case USB_ENDPOINT_XFER_ISOC:
714 r8a66597_type = R8A66597_ISO;
715 break;
716 default:
717 printk(KERN_ERR "r8a66597: Illegal type\n");
718 r8a66597_type = 0x0000;
719 break;
720 }
721
722 return r8a66597_type;
723 }
724
725 static u16 get_bufnum(u16 pipenum)
726 {
727 u16 bufnum = 0;
728
729 if (pipenum == 0)
730 bufnum = 0;
731 else if (check_bulk_or_isoc(pipenum))
732 bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
733 else if (check_interrupt(pipenum))
734 bufnum = 4 + (pipenum - 6);
735 else
736 printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum);
737
738 return bufnum;
739 }
740
741 static u16 get_buf_bsize(u16 pipenum)
742 {
743 u16 buf_bsize = 0;
744
745 if (pipenum == 0)
746 buf_bsize = 3;
747 else if (check_bulk_or_isoc(pipenum))
748 buf_bsize = R8A66597_BUF_BSIZE - 1;
749 else if (check_interrupt(pipenum))
750 buf_bsize = 0;
751 else
752 printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum);
753
754 return buf_bsize;
755 }
756
757 /* this function must be called with interrupt disabled */
758 static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
759 struct r8a66597_device *dev,
760 struct r8a66597_pipe *pipe,
761 struct urb *urb)
762 {
763 #if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
764 int i;
765 struct r8a66597_pipe_info *info = &pipe->info;
766
767 if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
768 for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
769 if ((r8a66597->dma_map & (1 << i)) != 0)
770 continue;
771
772 dev_info(&dev->udev->dev,
773 "address %d, EndpointAddress 0x%02x use "
774 "DMA FIFO\n", usb_pipedevice(urb->pipe),
775 info->dir_in ?
776 USB_ENDPOINT_DIR_MASK + info->epnum
777 : info->epnum);
778
779 r8a66597->dma_map |= 1 << i;
780 dev->dma_map |= 1 << i;
781 set_pipe_reg_addr(pipe, i);
782
783 cfifo_change(r8a66597, 0);
784 r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
785 MBW | CURPIPE, pipe->fifosel);
786
787 r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
788 pipe->info.pipenum);
789 r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
790 break;
791 }
792 }
793 #endif /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
794 }
795
796 /* this function must be called with interrupt disabled */
797 static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
798 struct usb_host_endpoint *hep,
799 struct r8a66597_pipe_info *info)
800 {
801 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
802 struct r8a66597_pipe *pipe = hep->hcpriv;
803
804 dbg("enable_pipe:");
805
806 pipe->info = *info;
807 set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
808 r8a66597->pipe_cnt[pipe->info.pipenum]++;
809 dev->pipe_cnt[pipe->info.pipenum]++;
810
811 enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
812 }
813
814 /* this function must be called with interrupt disabled */
815 static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
816 {
817 struct r8a66597_td *td, *next;
818 struct urb *urb;
819 struct list_head *list = &r8a66597->pipe_queue[pipenum];
820
821 if (list_empty(list))
822 return;
823
824 list_for_each_entry_safe(td, next, list, queue) {
825 if (!td)
826 continue;
827 if (td->address != address)
828 continue;
829
830 urb = td->urb;
831 list_del(&td->queue);
832 kfree(td);
833
834 if (urb) {
835 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
836 urb);
837
838 spin_unlock(&r8a66597->lock);
839 usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb,
840 -ENODEV);
841 spin_lock(&r8a66597->lock);
842 }
843 break;
844 }
845 }
846
847 /* this function must be called with interrupt disabled */
848 static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
849 struct r8a66597_device *dev)
850 {
851 int check_ep0 = 0;
852 u16 pipenum;
853
854 if (!dev)
855 return;
856
857 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
858 if (!dev->pipe_cnt[pipenum])
859 continue;
860
861 if (!check_ep0) {
862 check_ep0 = 1;
863 force_dequeue(r8a66597, 0, dev->address);
864 }
865
866 r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
867 dev->pipe_cnt[pipenum] = 0;
868 force_dequeue(r8a66597, pipenum, dev->address);
869 }
870
871 dbg("disable_pipe");
872
873 r8a66597->dma_map &= ~(dev->dma_map);
874 dev->dma_map = 0;
875 }
876
877 static u16 get_interval(struct urb *urb, __u8 interval)
878 {
879 u16 time = 1;
880 int i;
881
882 if (urb->dev->speed == USB_SPEED_HIGH) {
883 if (interval > IITV)
884 time = IITV;
885 else
886 time = interval ? interval - 1 : 0;
887 } else {
888 if (interval > 128) {
889 time = IITV;
890 } else {
891 /* calculate the nearest value for PIPEPERI */
892 for (i = 0; i < 7; i++) {
893 if ((1 << i) < interval &&
894 (1 << (i + 1) > interval))
895 time = 1 << i;
896 }
897 }
898 }
899
900 return time;
901 }
902
903 static unsigned long get_timer_interval(struct urb *urb, __u8 interval)
904 {
905 __u8 i;
906 unsigned long time = 1;
907
908 if (usb_pipeisoc(urb->pipe))
909 return 0;
910
911 if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) {
912 for (i = 0; i < (interval - 1); i++)
913 time *= 2;
914 time = time * 125 / 1000; /* uSOF -> msec */
915 } else {
916 time = interval;
917 }
918
919 return time;
920 }
921
922 /* this function must be called with interrupt disabled */
923 static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
924 struct usb_host_endpoint *hep,
925 struct usb_endpoint_descriptor *ep)
926 {
927 struct r8a66597_pipe_info info;
928
929 info.pipenum = get_empty_pipenum(r8a66597, ep);
930 info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
931 info.epnum = usb_endpoint_num(ep);
932 info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
933 info.type = get_r8a66597_type(usb_endpoint_type(ep));
934 info.bufnum = get_bufnum(info.pipenum);
935 info.buf_bsize = get_buf_bsize(info.pipenum);
936 if (info.type == R8A66597_BULK) {
937 info.interval = 0;
938 info.timer_interval = 0;
939 } else {
940 info.interval = get_interval(urb, ep->bInterval);
941 info.timer_interval = get_timer_interval(urb, ep->bInterval);
942 }
943 if (usb_endpoint_dir_in(ep))
944 info.dir_in = 1;
945 else
946 info.dir_in = 0;
947
948 enable_r8a66597_pipe(r8a66597, urb, hep, &info);
949 }
950
951 static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
952 {
953 struct r8a66597_device *dev;
954
955 dev = get_urb_to_r8a66597_dev(r8a66597, urb);
956 dev->state = USB_STATE_CONFIGURED;
957 }
958
959 static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
960 u16 pipenum)
961 {
962 if (pipenum == 0 && usb_pipeout(urb->pipe))
963 enable_irq_empty(r8a66597, pipenum);
964 else
965 enable_irq_ready(r8a66597, pipenum);
966
967 if (!usb_pipeisoc(urb->pipe))
968 enable_irq_nrdy(r8a66597, pipenum);
969 }
970
971 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
972 {
973 disable_irq_ready(r8a66597, pipenum);
974 disable_irq_nrdy(r8a66597, pipenum);
975 }
976
977 static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597)
978 {
979 mod_timer(&r8a66597->rh_timer,
980 jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME));
981 }
982
983 static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port,
984 int connect)
985 {
986 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
987
988 rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
989 rh->scount = R8A66597_MAX_SAMPLING;
990 if (connect)
991 rh->port |= 1 << USB_PORT_FEAT_CONNECTION;
992 else
993 rh->port &= ~(1 << USB_PORT_FEAT_CONNECTION);
994 rh->port |= 1 << USB_PORT_FEAT_C_CONNECTION;
995
996 r8a66597_root_hub_start_polling(r8a66597);
997 }
998
999 /* this function must be called with interrupt disabled */
1000 static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port,
1001 u16 syssts)
1002 {
1003 if (syssts == SE0) {
1004 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
1005 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
1006 return;
1007 }
1008
1009 if (syssts == FS_JSTS)
1010 r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
1011 else if (syssts == LS_JSTS)
1012 r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
1013
1014 r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
1015 r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
1016
1017 if (r8a66597->bus_suspended)
1018 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1019 }
1020
1021 /* this function must be called with interrupt disabled */
1022 static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
1023 {
1024 u16 speed = get_rh_usb_speed(r8a66597, port);
1025 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1026
1027 if (speed == HSMODE)
1028 rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED);
1029 else if (speed == LSMODE)
1030 rh->port |= (1 << USB_PORT_FEAT_LOWSPEED);
1031
1032 rh->port &= ~(1 << USB_PORT_FEAT_RESET);
1033 rh->port |= 1 << USB_PORT_FEAT_ENABLE;
1034 }
1035
1036 /* this function must be called with interrupt disabled */
1037 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
1038 {
1039 struct r8a66597_device *dev = r8a66597->root_hub[port].dev;
1040
1041 disable_r8a66597_pipe_all(r8a66597, dev);
1042 free_usb_address(r8a66597, dev);
1043
1044 start_root_hub_sampling(r8a66597, port, 0);
1045 }
1046
1047 /* this function must be called with interrupt disabled */
1048 static void prepare_setup_packet(struct r8a66597 *r8a66597,
1049 struct r8a66597_td *td)
1050 {
1051 int i;
1052 __le16 *p = (__le16 *)td->urb->setup_packet;
1053 unsigned long setup_addr = USBREQ;
1054
1055 r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
1056 DCPMAXP);
1057 r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
1058
1059 for (i = 0; i < 4; i++) {
1060 r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
1061 setup_addr += 2;
1062 }
1063 r8a66597_write(r8a66597, SUREQ, DCPCTR);
1064 }
1065
1066 /* this function must be called with interrupt disabled */
1067 static void prepare_packet_read(struct r8a66597 *r8a66597,
1068 struct r8a66597_td *td)
1069 {
1070 struct urb *urb = td->urb;
1071
1072 if (usb_pipecontrol(urb->pipe)) {
1073 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1074 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1075 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1076 if (urb->actual_length == 0) {
1077 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1078 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1079 }
1080 pipe_irq_disable(r8a66597, td->pipenum);
1081 pipe_start(r8a66597, td->pipe);
1082 pipe_irq_enable(r8a66597, urb, td->pipenum);
1083 } else {
1084 if (urb->actual_length == 0) {
1085 pipe_irq_disable(r8a66597, td->pipenum);
1086 pipe_setting(r8a66597, td);
1087 pipe_stop(r8a66597, td->pipe);
1088 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1089
1090 if (td->pipe->pipetre) {
1091 r8a66597_write(r8a66597, TRCLR,
1092 td->pipe->pipetre);
1093 r8a66597_write(r8a66597,
1094 DIV_ROUND_UP
1095 (urb->transfer_buffer_length,
1096 td->maxpacket),
1097 td->pipe->pipetrn);
1098 r8a66597_bset(r8a66597, TRENB,
1099 td->pipe->pipetre);
1100 }
1101
1102 pipe_start(r8a66597, td->pipe);
1103 pipe_irq_enable(r8a66597, urb, td->pipenum);
1104 }
1105 }
1106 }
1107
1108 /* this function must be called with interrupt disabled */
1109 static void prepare_packet_write(struct r8a66597 *r8a66597,
1110 struct r8a66597_td *td)
1111 {
1112 u16 tmp;
1113 struct urb *urb = td->urb;
1114
1115 if (usb_pipecontrol(urb->pipe)) {
1116 pipe_stop(r8a66597, td->pipe);
1117 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1118 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1119 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1120 if (urb->actual_length == 0) {
1121 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1122 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1123 }
1124 } else {
1125 if (urb->actual_length == 0)
1126 pipe_setting(r8a66597, td);
1127 if (td->pipe->pipetre)
1128 r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
1129 }
1130 r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1131
1132 fifo_change_from_pipe(r8a66597, td->pipe);
1133 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1134 if (unlikely((tmp & FRDY) == 0))
1135 pipe_irq_enable(r8a66597, urb, td->pipenum);
1136 else
1137 packet_write(r8a66597, td->pipenum);
1138 pipe_start(r8a66597, td->pipe);
1139 }
1140
1141 /* this function must be called with interrupt disabled */
1142 static void prepare_status_packet(struct r8a66597 *r8a66597,
1143 struct r8a66597_td *td)
1144 {
1145 struct urb *urb = td->urb;
1146
1147 r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1148 pipe_stop(r8a66597, td->pipe);
1149
1150 if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
1151 r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1152 r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1153 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1154 r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
1155 r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR);
1156 enable_irq_empty(r8a66597, 0);
1157 } else {
1158 r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1159 r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1160 r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1161 r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1162 enable_irq_ready(r8a66597, 0);
1163 }
1164 enable_irq_nrdy(r8a66597, 0);
1165 pipe_start(r8a66597, td->pipe);
1166 }
1167
1168 static int is_set_address(unsigned char *setup_packet)
1169 {
1170 if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
1171 setup_packet[1] == USB_REQ_SET_ADDRESS)
1172 return 1;
1173 else
1174 return 0;
1175 }
1176
1177 /* this function must be called with interrupt disabled */
1178 static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1179 {
1180 BUG_ON(!td);
1181
1182 switch (td->type) {
1183 case USB_PID_SETUP:
1184 if (is_set_address(td->urb->setup_packet)) {
1185 td->set_address = 1;
1186 td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
1187 td->urb);
1188 if (td->urb->setup_packet[2] == 0)
1189 return -EPIPE;
1190 }
1191 prepare_setup_packet(r8a66597, td);
1192 break;
1193 case USB_PID_IN:
1194 prepare_packet_read(r8a66597, td);
1195 break;
1196 case USB_PID_OUT:
1197 prepare_packet_write(r8a66597, td);
1198 break;
1199 case USB_PID_ACK:
1200 prepare_status_packet(r8a66597, td);
1201 break;
1202 default:
1203 printk(KERN_ERR "r8a66597: invalid type.\n");
1204 break;
1205 }
1206
1207 return 0;
1208 }
1209
1210 static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
1211 {
1212 if (usb_pipeisoc(urb->pipe)) {
1213 if (urb->number_of_packets == td->iso_cnt)
1214 return 1;
1215 }
1216
1217 /* control or bulk or interrupt */
1218 if ((urb->transfer_buffer_length <= urb->actual_length) ||
1219 (td->short_packet) || (td->zero_packet))
1220 return 1;
1221
1222 return 0;
1223 }
1224
1225 /* this function must be called with interrupt disabled */
1226 static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1227 {
1228 unsigned long time;
1229
1230 BUG_ON(!td);
1231
1232 if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
1233 !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
1234 r8a66597->timeout_map |= 1 << td->pipenum;
1235 switch (usb_pipetype(td->urb->pipe)) {
1236 case PIPE_INTERRUPT:
1237 case PIPE_ISOCHRONOUS:
1238 time = 30;
1239 break;
1240 default:
1241 time = 300;
1242 break;
1243 }
1244
1245 mod_timer(&r8a66597->td_timer[td->pipenum],
1246 jiffies + msecs_to_jiffies(time));
1247 }
1248 }
1249
1250 /* this function must be called with interrupt disabled */
1251 static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
1252 u16 pipenum, struct urb *urb, int status)
1253 __releases(r8a66597->lock) __acquires(r8a66597->lock)
1254 {
1255 int restart = 0;
1256 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
1257
1258 r8a66597->timeout_map &= ~(1 << pipenum);
1259
1260 if (likely(td)) {
1261 if (td->set_address && (status != 0 || urb->unlinked))
1262 r8a66597->address_map &= ~(1 << urb->setup_packet[2]);
1263
1264 pipe_toggle_save(r8a66597, td->pipe, urb);
1265 list_del(&td->queue);
1266 kfree(td);
1267 }
1268
1269 if (!list_empty(&r8a66597->pipe_queue[pipenum]))
1270 restart = 1;
1271
1272 if (likely(urb)) {
1273 if (usb_pipeisoc(urb->pipe))
1274 urb->start_frame = r8a66597_get_frame(hcd);
1275
1276 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
1277 spin_unlock(&r8a66597->lock);
1278 usb_hcd_giveback_urb(hcd, urb, status);
1279 spin_lock(&r8a66597->lock);
1280 }
1281
1282 if (restart) {
1283 td = r8a66597_get_td(r8a66597, pipenum);
1284 if (unlikely(!td))
1285 return;
1286
1287 start_transfer(r8a66597, td);
1288 set_td_timer(r8a66597, td);
1289 }
1290 }
1291
1292 static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
1293 {
1294 u16 tmp;
1295 int rcv_len, bufsize, urb_len, size;
1296 u16 *buf;
1297 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1298 struct urb *urb;
1299 int finish = 0;
1300 int status = 0;
1301
1302 if (unlikely(!td))
1303 return;
1304 urb = td->urb;
1305
1306 fifo_change_from_pipe(r8a66597, td->pipe);
1307 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1308 if (unlikely((tmp & FRDY) == 0)) {
1309 pipe_stop(r8a66597, td->pipe);
1310 pipe_irq_disable(r8a66597, pipenum);
1311 printk(KERN_ERR "r8a66597: in fifo not ready (%d)\n", pipenum);
1312 finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
1313 return;
1314 }
1315
1316 /* prepare parameters */
1317 rcv_len = tmp & DTLN;
1318 if (usb_pipeisoc(urb->pipe)) {
1319 buf = (u16 *)(urb->transfer_buffer +
1320 urb->iso_frame_desc[td->iso_cnt].offset);
1321 urb_len = urb->iso_frame_desc[td->iso_cnt].length;
1322 } else {
1323 buf = (void *)urb->transfer_buffer + urb->actual_length;
1324 urb_len = urb->transfer_buffer_length - urb->actual_length;
1325 }
1326 bufsize = min(urb_len, (int) td->maxpacket);
1327 if (rcv_len <= bufsize) {
1328 size = rcv_len;
1329 } else {
1330 size = bufsize;
1331 status = -EOVERFLOW;
1332 finish = 1;
1333 }
1334
1335 /* update parameters */
1336 urb->actual_length += size;
1337 if (rcv_len == 0)
1338 td->zero_packet = 1;
1339 if (rcv_len < bufsize) {
1340 td->short_packet = 1;
1341 }
1342 if (usb_pipeisoc(urb->pipe)) {
1343 urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1344 urb->iso_frame_desc[td->iso_cnt].status = status;
1345 td->iso_cnt++;
1346 finish = 0;
1347 }
1348
1349 /* check transfer finish */
1350 if (finish || check_transfer_finish(td, urb)) {
1351 pipe_stop(r8a66597, td->pipe);
1352 pipe_irq_disable(r8a66597, pipenum);
1353 finish = 1;
1354 }
1355
1356 /* read fifo */
1357 if (urb->transfer_buffer) {
1358 if (size == 0)
1359 r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
1360 else
1361 r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
1362 buf, size);
1363 }
1364
1365 if (finish && pipenum != 0)
1366 finish_request(r8a66597, td, pipenum, urb, status);
1367 }
1368
1369 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
1370 {
1371 u16 tmp;
1372 int bufsize, size;
1373 u16 *buf;
1374 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1375 struct urb *urb;
1376
1377 if (unlikely(!td))
1378 return;
1379 urb = td->urb;
1380
1381 fifo_change_from_pipe(r8a66597, td->pipe);
1382 tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1383 if (unlikely((tmp & FRDY) == 0)) {
1384 pipe_stop(r8a66597, td->pipe);
1385 pipe_irq_disable(r8a66597, pipenum);
1386 printk(KERN_ERR "r8a66597: out fifo not ready (%d)\n", pipenum);
1387 finish_request(r8a66597, td, pipenum, urb, -EPIPE);
1388 return;
1389 }
1390
1391 /* prepare parameters */
1392 bufsize = td->maxpacket;
1393 if (usb_pipeisoc(urb->pipe)) {
1394 buf = (u16 *)(urb->transfer_buffer +
1395 urb->iso_frame_desc[td->iso_cnt].offset);
1396 size = min(bufsize,
1397 (int)urb->iso_frame_desc[td->iso_cnt].length);
1398 } else {
1399 buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
1400 size = min_t(u32, bufsize,
1401 urb->transfer_buffer_length - urb->actual_length);
1402 }
1403
1404 /* write fifo */
1405 if (pipenum > 0)
1406 r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
1407 if (urb->transfer_buffer) {
1408 r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
1409 if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
1410 r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
1411 }
1412
1413 /* update parameters */
1414 urb->actual_length += size;
1415 if (usb_pipeisoc(urb->pipe)) {
1416 urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1417 urb->iso_frame_desc[td->iso_cnt].status = 0;
1418 td->iso_cnt++;
1419 }
1420
1421 /* check transfer finish */
1422 if (check_transfer_finish(td, urb)) {
1423 disable_irq_ready(r8a66597, pipenum);
1424 enable_irq_empty(r8a66597, pipenum);
1425 if (!usb_pipeisoc(urb->pipe))
1426 enable_irq_nrdy(r8a66597, pipenum);
1427 } else
1428 pipe_irq_enable(r8a66597, urb, pipenum);
1429 }
1430
1431
1432 static void check_next_phase(struct r8a66597 *r8a66597, int status)
1433 {
1434 struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
1435 struct urb *urb;
1436 u8 finish = 0;
1437
1438 if (unlikely(!td))
1439 return;
1440 urb = td->urb;
1441
1442 switch (td->type) {
1443 case USB_PID_IN:
1444 case USB_PID_OUT:
1445 if (check_transfer_finish(td, urb))
1446 td->type = USB_PID_ACK;
1447 break;
1448 case USB_PID_SETUP:
1449 if (urb->transfer_buffer_length == urb->actual_length)
1450 td->type = USB_PID_ACK;
1451 else if (usb_pipeout(urb->pipe))
1452 td->type = USB_PID_OUT;
1453 else
1454 td->type = USB_PID_IN;
1455 break;
1456 case USB_PID_ACK:
1457 finish = 1;
1458 break;
1459 }
1460
1461 if (finish || status != 0 || urb->unlinked)
1462 finish_request(r8a66597, td, 0, urb, status);
1463 else
1464 start_transfer(r8a66597, td);
1465 }
1466
1467 static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
1468 {
1469 struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1470
1471 if (td) {
1472 u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;
1473
1474 if (pid == PID_NAK)
1475 return -ECONNRESET;
1476 else
1477 return -EPIPE;
1478 }
1479 return 0;
1480 }
1481
1482 static void irq_pipe_ready(struct r8a66597 *r8a66597)
1483 {
1484 u16 check;
1485 u16 pipenum;
1486 u16 mask;
1487 struct r8a66597_td *td;
1488
1489 mask = r8a66597_read(r8a66597, BRDYSTS)
1490 & r8a66597_read(r8a66597, BRDYENB);
1491 r8a66597_write(r8a66597, ~mask, BRDYSTS);
1492 if (mask & BRDY0) {
1493 td = r8a66597_get_td(r8a66597, 0);
1494 if (td && td->type == USB_PID_IN)
1495 packet_read(r8a66597, 0);
1496 else
1497 pipe_irq_disable(r8a66597, 0);
1498 check_next_phase(r8a66597, 0);
1499 }
1500
1501 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1502 check = 1 << pipenum;
1503 if (mask & check) {
1504 td = r8a66597_get_td(r8a66597, pipenum);
1505 if (unlikely(!td))
1506 continue;
1507
1508 if (td->type == USB_PID_IN)
1509 packet_read(r8a66597, pipenum);
1510 else if (td->type == USB_PID_OUT)
1511 packet_write(r8a66597, pipenum);
1512 }
1513 }
1514 }
1515
1516 static void irq_pipe_empty(struct r8a66597 *r8a66597)
1517 {
1518 u16 tmp;
1519 u16 check;
1520 u16 pipenum;
1521 u16 mask;
1522 struct r8a66597_td *td;
1523
1524 mask = r8a66597_read(r8a66597, BEMPSTS)
1525 & r8a66597_read(r8a66597, BEMPENB);
1526 r8a66597_write(r8a66597, ~mask, BEMPSTS);
1527 if (mask & BEMP0) {
1528 cfifo_change(r8a66597, 0);
1529 td = r8a66597_get_td(r8a66597, 0);
1530 if (td && td->type != USB_PID_OUT)
1531 disable_irq_empty(r8a66597, 0);
1532 check_next_phase(r8a66597, 0);
1533 }
1534
1535 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1536 check = 1 << pipenum;
1537 if (mask & check) {
1538 struct r8a66597_td *td;
1539 td = r8a66597_get_td(r8a66597, pipenum);
1540 if (unlikely(!td))
1541 continue;
1542
1543 tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
1544 if ((tmp & INBUFM) == 0) {
1545 disable_irq_empty(r8a66597, pipenum);
1546 pipe_irq_disable(r8a66597, pipenum);
1547 finish_request(r8a66597, td, pipenum, td->urb,
1548 0);
1549 }
1550 }
1551 }
1552 }
1553
1554 static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
1555 {
1556 u16 check;
1557 u16 pipenum;
1558 u16 mask;
1559 int status;
1560
1561 mask = r8a66597_read(r8a66597, NRDYSTS)
1562 & r8a66597_read(r8a66597, NRDYENB);
1563 r8a66597_write(r8a66597, ~mask, NRDYSTS);
1564 if (mask & NRDY0) {
1565 cfifo_change(r8a66597, 0);
1566 status = get_urb_error(r8a66597, 0);
1567 pipe_irq_disable(r8a66597, 0);
1568 check_next_phase(r8a66597, status);
1569 }
1570
1571 for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1572 check = 1 << pipenum;
1573 if (mask & check) {
1574 struct r8a66597_td *td;
1575 td = r8a66597_get_td(r8a66597, pipenum);
1576 if (unlikely(!td))
1577 continue;
1578
1579 status = get_urb_error(r8a66597, pipenum);
1580 pipe_irq_disable(r8a66597, pipenum);
1581 pipe_stop(r8a66597, td->pipe);
1582 finish_request(r8a66597, td, pipenum, td->urb, status);
1583 }
1584 }
1585 }
1586
1587 static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
1588 {
1589 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1590 u16 intsts0, intsts1, intsts2;
1591 u16 intenb0, intenb1, intenb2;
1592 u16 mask0, mask1, mask2;
1593 int status;
1594
1595 spin_lock(&r8a66597->lock);
1596
1597 intsts0 = r8a66597_read(r8a66597, INTSTS0);
1598 intsts1 = r8a66597_read(r8a66597, INTSTS1);
1599 intsts2 = r8a66597_read(r8a66597, INTSTS2);
1600 intenb0 = r8a66597_read(r8a66597, INTENB0);
1601 intenb1 = r8a66597_read(r8a66597, INTENB1);
1602 intenb2 = r8a66597_read(r8a66597, INTENB2);
1603
1604 mask2 = intsts2 & intenb2;
1605 mask1 = intsts1 & intenb1;
1606 mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
1607 if (mask2) {
1608 if (mask2 & ATTCH) {
1609 r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
1610 r8a66597_bclr(r8a66597, ATTCHE, INTENB2);
1611
1612 /* start usb bus sampling */
1613 start_root_hub_sampling(r8a66597, 1, 1);
1614 }
1615 if (mask2 & DTCH) {
1616 r8a66597_write(r8a66597, ~DTCH, INTSTS2);
1617 r8a66597_bclr(r8a66597, DTCHE, INTENB2);
1618 r8a66597_usb_disconnect(r8a66597, 1);
1619 }
1620 if (mask2 & BCHG) {
1621 r8a66597_write(r8a66597, ~BCHG, INTSTS2);
1622 r8a66597_bclr(r8a66597, BCHGE, INTENB2);
1623 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1624 }
1625 }
1626
1627 if (mask1) {
1628 if (mask1 & ATTCH) {
1629 r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
1630 r8a66597_bclr(r8a66597, ATTCHE, INTENB1);
1631
1632 /* start usb bus sampling */
1633 start_root_hub_sampling(r8a66597, 0, 1);
1634 }
1635 if (mask1 & DTCH) {
1636 r8a66597_write(r8a66597, ~DTCH, INTSTS1);
1637 r8a66597_bclr(r8a66597, DTCHE, INTENB1);
1638 r8a66597_usb_disconnect(r8a66597, 0);
1639 }
1640 if (mask1 & BCHG) {
1641 r8a66597_write(r8a66597, ~BCHG, INTSTS1);
1642 r8a66597_bclr(r8a66597, BCHGE, INTENB1);
1643 usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1644 }
1645
1646 if (mask1 & SIGN) {
1647 r8a66597_write(r8a66597, ~SIGN, INTSTS1);
1648 status = get_urb_error(r8a66597, 0);
1649 check_next_phase(r8a66597, status);
1650 }
1651 if (mask1 & SACK) {
1652 r8a66597_write(r8a66597, ~SACK, INTSTS1);
1653 check_next_phase(r8a66597, 0);
1654 }
1655 }
1656 if (mask0) {
1657 if (mask0 & BRDY)
1658 irq_pipe_ready(r8a66597);
1659 if (mask0 & BEMP)
1660 irq_pipe_empty(r8a66597);
1661 if (mask0 & NRDY)
1662 irq_pipe_nrdy(r8a66597);
1663 }
1664
1665 spin_unlock(&r8a66597->lock);
1666 return IRQ_HANDLED;
1667 }
1668
1669 /* this function must be called with interrupt disabled */
1670 static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
1671 {
1672 u16 tmp;
1673 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1674
1675 if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
1676 unsigned long dvstctr_reg = get_dvstctr_reg(port);
1677
1678 tmp = r8a66597_read(r8a66597, dvstctr_reg);
1679 if ((tmp & USBRST) == USBRST) {
1680 r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
1681 dvstctr_reg);
1682 r8a66597_root_hub_start_polling(r8a66597);
1683 } else
1684 r8a66597_usb_connect(r8a66597, port);
1685 }
1686
1687 if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) {
1688 r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
1689 r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
1690 }
1691
1692 if (rh->scount > 0) {
1693 tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
1694 if (tmp == rh->old_syssts) {
1695 rh->scount--;
1696 if (rh->scount == 0)
1697 r8a66597_check_syssts(r8a66597, port, tmp);
1698 else
1699 r8a66597_root_hub_start_polling(r8a66597);
1700 } else {
1701 rh->scount = R8A66597_MAX_SAMPLING;
1702 rh->old_syssts = tmp;
1703 r8a66597_root_hub_start_polling(r8a66597);
1704 }
1705 }
1706 }
1707
1708 static void r8a66597_interval_timer(unsigned long _r8a66597)
1709 {
1710 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1711 unsigned long flags;
1712 u16 pipenum;
1713 struct r8a66597_td *td;
1714
1715 spin_lock_irqsave(&r8a66597->lock, flags);
1716
1717 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1718 if (!(r8a66597->interval_map & (1 << pipenum)))
1719 continue;
1720 if (timer_pending(&r8a66597->interval_timer[pipenum]))
1721 continue;
1722
1723 td = r8a66597_get_td(r8a66597, pipenum);
1724 if (td)
1725 start_transfer(r8a66597, td);
1726 }
1727
1728 spin_unlock_irqrestore(&r8a66597->lock, flags);
1729 }
1730
1731 static void r8a66597_td_timer(unsigned long _r8a66597)
1732 {
1733 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1734 unsigned long flags;
1735 u16 pipenum;
1736 struct r8a66597_td *td, *new_td = NULL;
1737 struct r8a66597_pipe *pipe;
1738
1739 spin_lock_irqsave(&r8a66597->lock, flags);
1740 for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1741 if (!(r8a66597->timeout_map & (1 << pipenum)))
1742 continue;
1743 if (timer_pending(&r8a66597->td_timer[pipenum]))
1744 continue;
1745
1746 td = r8a66597_get_td(r8a66597, pipenum);
1747 if (!td) {
1748 r8a66597->timeout_map &= ~(1 << pipenum);
1749 continue;
1750 }
1751
1752 if (td->urb->actual_length) {
1753 set_td_timer(r8a66597, td);
1754 break;
1755 }
1756
1757 pipe = td->pipe;
1758 pipe_stop(r8a66597, pipe);
1759
1760 new_td = td;
1761 do {
1762 list_move_tail(&new_td->queue,
1763 &r8a66597->pipe_queue[pipenum]);
1764 new_td = r8a66597_get_td(r8a66597, pipenum);
1765 if (!new_td) {
1766 new_td = td;
1767 break;
1768 }
1769 } while (td != new_td && td->address == new_td->address);
1770
1771 start_transfer(r8a66597, new_td);
1772
1773 if (td == new_td)
1774 r8a66597->timeout_map &= ~(1 << pipenum);
1775 else
1776 set_td_timer(r8a66597, new_td);
1777 break;
1778 }
1779 spin_unlock_irqrestore(&r8a66597->lock, flags);
1780 }
1781
1782 static void r8a66597_timer(unsigned long _r8a66597)
1783 {
1784 struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
1785 unsigned long flags;
1786 int port;
1787
1788 spin_lock_irqsave(&r8a66597->lock, flags);
1789
1790 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
1791 r8a66597_root_hub_control(r8a66597, port);
1792
1793 spin_unlock_irqrestore(&r8a66597->lock, flags);
1794 }
1795
1796 static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
1797 {
1798 struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
1799
1800 if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
1801 (urb->dev->state == USB_STATE_CONFIGURED))
1802 return 1;
1803 else
1804 return 0;
1805 }
1806
1807 static int r8a66597_start(struct usb_hcd *hcd)
1808 {
1809 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1810
1811 hcd->state = HC_STATE_RUNNING;
1812 return enable_controller(r8a66597);
1813 }
1814
1815 static void r8a66597_stop(struct usb_hcd *hcd)
1816 {
1817 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1818
1819 disable_controller(r8a66597);
1820 }
1821
1822 static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
1823 {
1824 unsigned int usb_address = usb_pipedevice(urb->pipe);
1825 u16 root_port, hub_port;
1826
1827 if (usb_address == 0) {
1828 get_port_number(urb->dev->devpath,
1829 &root_port, &hub_port);
1830 set_devadd_reg(r8a66597, 0,
1831 get_r8a66597_usb_speed(urb->dev->speed),
1832 get_parent_r8a66597_address(r8a66597, urb->dev),
1833 hub_port, root_port);
1834 }
1835 }
1836
1837 static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
1838 struct urb *urb,
1839 struct usb_host_endpoint *hep)
1840 {
1841 struct r8a66597_td *td;
1842 u16 pipenum;
1843
1844 td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
1845 if (td == NULL)
1846 return NULL;
1847
1848 pipenum = r8a66597_get_pipenum(urb, hep);
1849 td->pipenum = pipenum;
1850 td->pipe = hep->hcpriv;
1851 td->urb = urb;
1852 td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
1853 td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
1854 !usb_pipein(urb->pipe));
1855 if (usb_pipecontrol(urb->pipe))
1856 td->type = USB_PID_SETUP;
1857 else if (usb_pipein(urb->pipe))
1858 td->type = USB_PID_IN;
1859 else
1860 td->type = USB_PID_OUT;
1861 INIT_LIST_HEAD(&td->queue);
1862
1863 return td;
1864 }
1865
1866 static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
1867 struct urb *urb,
1868 gfp_t mem_flags)
1869 {
1870 struct usb_host_endpoint *hep = urb->ep;
1871 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1872 struct r8a66597_td *td = NULL;
1873 int ret, request = 0;
1874 unsigned long flags;
1875
1876 spin_lock_irqsave(&r8a66597->lock, flags);
1877 if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
1878 ret = -ENODEV;
1879 goto error_not_linked;
1880 }
1881
1882 ret = usb_hcd_link_urb_to_ep(hcd, urb);
1883 if (ret)
1884 goto error_not_linked;
1885
1886 if (!hep->hcpriv) {
1887 hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
1888 GFP_ATOMIC);
1889 if (!hep->hcpriv) {
1890 ret = -ENOMEM;
1891 goto error;
1892 }
1893 set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
1894 if (usb_pipeendpoint(urb->pipe))
1895 init_pipe_info(r8a66597, urb, hep, &hep->desc);
1896 }
1897
1898 if (unlikely(check_pipe_config(r8a66597, urb)))
1899 init_pipe_config(r8a66597, urb);
1900
1901 set_address_zero(r8a66597, urb);
1902 td = r8a66597_make_td(r8a66597, urb, hep);
1903 if (td == NULL) {
1904 ret = -ENOMEM;
1905 goto error;
1906 }
1907 if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
1908 request = 1;
1909 list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
1910 urb->hcpriv = td;
1911
1912 if (request) {
1913 if (td->pipe->info.timer_interval) {
1914 r8a66597->interval_map |= 1 << td->pipenum;
1915 mod_timer(&r8a66597->interval_timer[td->pipenum],
1916 jiffies + msecs_to_jiffies(
1917 td->pipe->info.timer_interval));
1918 } else {
1919 ret = start_transfer(r8a66597, td);
1920 if (ret < 0) {
1921 list_del(&td->queue);
1922 kfree(td);
1923 }
1924 }
1925 } else
1926 set_td_timer(r8a66597, td);
1927
1928 error:
1929 if (ret)
1930 usb_hcd_unlink_urb_from_ep(hcd, urb);
1931 error_not_linked:
1932 spin_unlock_irqrestore(&r8a66597->lock, flags);
1933 return ret;
1934 }
1935
1936 static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1937 int status)
1938 {
1939 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1940 struct r8a66597_td *td;
1941 unsigned long flags;
1942 int rc;
1943
1944 spin_lock_irqsave(&r8a66597->lock, flags);
1945 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1946 if (rc)
1947 goto done;
1948
1949 if (urb->hcpriv) {
1950 td = urb->hcpriv;
1951 pipe_stop(r8a66597, td->pipe);
1952 pipe_irq_disable(r8a66597, td->pipenum);
1953 disable_irq_empty(r8a66597, td->pipenum);
1954 finish_request(r8a66597, td, td->pipenum, urb, status);
1955 }
1956 done:
1957 spin_unlock_irqrestore(&r8a66597->lock, flags);
1958 return rc;
1959 }
1960
1961 static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
1962 struct usb_host_endpoint *hep)
1963 {
1964 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1965 struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
1966 struct r8a66597_td *td;
1967 struct urb *urb = NULL;
1968 u16 pipenum;
1969 unsigned long flags;
1970
1971 if (pipe == NULL)
1972 return;
1973 pipenum = pipe->info.pipenum;
1974
1975 if (pipenum == 0) {
1976 kfree(hep->hcpriv);
1977 hep->hcpriv = NULL;
1978 return;
1979 }
1980
1981 spin_lock_irqsave(&r8a66597->lock, flags);
1982 pipe_stop(r8a66597, pipe);
1983 pipe_irq_disable(r8a66597, pipenum);
1984 disable_irq_empty(r8a66597, pipenum);
1985 td = r8a66597_get_td(r8a66597, pipenum);
1986 if (td)
1987 urb = td->urb;
1988 finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
1989 kfree(hep->hcpriv);
1990 hep->hcpriv = NULL;
1991 spin_unlock_irqrestore(&r8a66597->lock, flags);
1992 }
1993
1994 static int r8a66597_get_frame(struct usb_hcd *hcd)
1995 {
1996 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1997 return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
1998 }
1999
2000 static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
2001 {
2002 int chix;
2003
2004 if (udev->state == USB_STATE_CONFIGURED &&
2005 udev->parent && udev->parent->devnum > 1 &&
2006 udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
2007 map[udev->devnum/32] |= (1 << (udev->devnum % 32));
2008
2009 for (chix = 0; chix < udev->maxchild; chix++) {
2010 struct usb_device *childdev = udev->children[chix];
2011
2012 if (childdev)
2013 collect_usb_address_map(childdev, map);
2014 }
2015 }
2016
2017 /* this function must be called with interrupt disabled */
2018 static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
2019 int addr)
2020 {
2021 struct r8a66597_device *dev;
2022 struct list_head *list = &r8a66597->child_device;
2023
2024 list_for_each_entry(dev, list, device_list) {
2025 if (!dev)
2026 continue;
2027 if (dev->usb_address != addr)
2028 continue;
2029
2030 return dev;
2031 }
2032
2033 printk(KERN_ERR "r8a66597: get_r8a66597_device fail.(%d)\n", addr);
2034 return NULL;
2035 }
2036
2037 static void update_usb_address_map(struct r8a66597 *r8a66597,
2038 struct usb_device *root_hub,
2039 unsigned long *map)
2040 {
2041 int i, j, addr;
2042 unsigned long diff;
2043 unsigned long flags;
2044
2045 for (i = 0; i < 4; i++) {
2046 diff = r8a66597->child_connect_map[i] ^ map[i];
2047 if (!diff)
2048 continue;
2049
2050 for (j = 0; j < 32; j++) {
2051 if (!(diff & (1 << j)))
2052 continue;
2053
2054 addr = i * 32 + j;
2055 if (map[i] & (1 << j))
2056 set_child_connect_map(r8a66597, addr);
2057 else {
2058 struct r8a66597_device *dev;
2059
2060 spin_lock_irqsave(&r8a66597->lock, flags);
2061 dev = get_r8a66597_device(r8a66597, addr);
2062 disable_r8a66597_pipe_all(r8a66597, dev);
2063 free_usb_address(r8a66597, dev);
2064 put_child_connect_map(r8a66597, addr);
2065 spin_unlock_irqrestore(&r8a66597->lock, flags);
2066 }
2067 }
2068 }
2069 }
2070
2071 static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
2072 struct usb_hcd *hcd)
2073 {
2074 struct usb_bus *bus;
2075 unsigned long now_map[4];
2076
2077 memset(now_map, 0, sizeof(now_map));
2078
2079 list_for_each_entry(bus, &usb_bus_list, bus_list) {
2080 if (!bus->root_hub)
2081 continue;
2082
2083 if (bus->busnum != hcd->self.busnum)
2084 continue;
2085
2086 collect_usb_address_map(bus->root_hub, now_map);
2087 update_usb_address_map(r8a66597, bus->root_hub, now_map);
2088 }
2089 }
2090
2091 static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
2092 {
2093 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2094 unsigned long flags;
2095 int i;
2096
2097 r8a66597_check_detect_child(r8a66597, hcd);
2098
2099 spin_lock_irqsave(&r8a66597->lock, flags);
2100
2101 *buf = 0; /* initialize (no change) */
2102
2103 for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
2104 if (r8a66597->root_hub[i].port & 0xffff0000)
2105 *buf |= 1 << (i + 1);
2106 }
2107
2108 spin_unlock_irqrestore(&r8a66597->lock, flags);
2109
2110 return (*buf != 0);
2111 }
2112
2113 static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
2114 struct usb_hub_descriptor *desc)
2115 {
2116 desc->bDescriptorType = 0x29;
2117 desc->bHubContrCurrent = 0;
2118 desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
2119 desc->bDescLength = 9;
2120 desc->bPwrOn2PwrGood = 0;
2121 desc->wHubCharacteristics = cpu_to_le16(0x0011);
2122 desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
2123 desc->bitmap[1] = ~0;
2124 }
2125
2126 static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
2127 u16 wIndex, char *buf, u16 wLength)
2128 {
2129 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2130 int ret;
2131 int port = (wIndex & 0x00FF) - 1;
2132 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2133 unsigned long flags;
2134
2135 ret = 0;
2136
2137 spin_lock_irqsave(&r8a66597->lock, flags);
2138 switch (typeReq) {
2139 case ClearHubFeature:
2140 case SetHubFeature:
2141 switch (wValue) {
2142 case C_HUB_OVER_CURRENT:
2143 case C_HUB_LOCAL_POWER:
2144 break;
2145 default:
2146 goto error;
2147 }
2148 break;
2149 case ClearPortFeature:
2150 if (wIndex > R8A66597_MAX_ROOT_HUB)
2151 goto error;
2152 if (wLength != 0)
2153 goto error;
2154
2155 switch (wValue) {
2156 case USB_PORT_FEAT_ENABLE:
2157 rh->port &= ~(1 << USB_PORT_FEAT_POWER);
2158 break;
2159 case USB_PORT_FEAT_SUSPEND:
2160 break;
2161 case USB_PORT_FEAT_POWER:
2162 r8a66597_port_power(r8a66597, port, 0);
2163 break;
2164 case USB_PORT_FEAT_C_ENABLE:
2165 case USB_PORT_FEAT_C_SUSPEND:
2166 case USB_PORT_FEAT_C_CONNECTION:
2167 case USB_PORT_FEAT_C_OVER_CURRENT:
2168 case USB_PORT_FEAT_C_RESET:
2169 break;
2170 default:
2171 goto error;
2172 }
2173 rh->port &= ~(1 << wValue);
2174 break;
2175 case GetHubDescriptor:
2176 r8a66597_hub_descriptor(r8a66597,
2177 (struct usb_hub_descriptor *)buf);
2178 break;
2179 case GetHubStatus:
2180 *buf = 0x00;
2181 break;
2182 case GetPortStatus:
2183 if (wIndex > R8A66597_MAX_ROOT_HUB)
2184 goto error;
2185 *(__le32 *)buf = cpu_to_le32(rh->port);
2186 break;
2187 case SetPortFeature:
2188 if (wIndex > R8A66597_MAX_ROOT_HUB)
2189 goto error;
2190 if (wLength != 0)
2191 goto error;
2192
2193 switch (wValue) {
2194 case USB_PORT_FEAT_SUSPEND:
2195 break;
2196 case USB_PORT_FEAT_POWER:
2197 r8a66597_port_power(r8a66597, port, 1);
2198 rh->port |= (1 << USB_PORT_FEAT_POWER);
2199 break;
2200 case USB_PORT_FEAT_RESET: {
2201 struct r8a66597_device *dev = rh->dev;
2202
2203 rh->port |= (1 << USB_PORT_FEAT_RESET);
2204
2205 disable_r8a66597_pipe_all(r8a66597, dev);
2206 free_usb_address(r8a66597, dev);
2207
2208 r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
2209 get_dvstctr_reg(port));
2210 mod_timer(&r8a66597->rh_timer,
2211 jiffies + msecs_to_jiffies(50));
2212 }
2213 break;
2214 default:
2215 goto error;
2216 }
2217 rh->port |= 1 << wValue;
2218 break;
2219 default:
2220 error:
2221 ret = -EPIPE;
2222 break;
2223 }
2224
2225 spin_unlock_irqrestore(&r8a66597->lock, flags);
2226 return ret;
2227 }
2228
2229 #if defined(CONFIG_PM)
2230 static int r8a66597_bus_suspend(struct usb_hcd *hcd)
2231 {
2232 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2233 int port;
2234
2235 dbg("%s", __func__);
2236
2237 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
2238 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2239 unsigned long dvstctr_reg = get_dvstctr_reg(port);
2240
2241 if (!(rh->port & (1 << USB_PORT_FEAT_ENABLE)))
2242 continue;
2243
2244 dbg("suspend port = %d", port);
2245 r8a66597_bclr(r8a66597, UACT, dvstctr_reg); /* suspend */
2246 rh->port |= 1 << USB_PORT_FEAT_SUSPEND;
2247
2248 if (rh->dev->udev->do_remote_wakeup) {
2249 msleep(3); /* waiting last SOF */
2250 r8a66597_bset(r8a66597, RWUPE, dvstctr_reg);
2251 r8a66597_write(r8a66597, ~BCHG, get_intsts_reg(port));
2252 r8a66597_bset(r8a66597, BCHGE, get_intenb_reg(port));
2253 }
2254 }
2255
2256 r8a66597->bus_suspended = 1;
2257
2258 return 0;
2259 }
2260
2261 static int r8a66597_bus_resume(struct usb_hcd *hcd)
2262 {
2263 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2264 int port;
2265
2266 dbg("%s", __func__);
2267
2268 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
2269 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2270 unsigned long dvstctr_reg = get_dvstctr_reg(port);
2271
2272 if (!(rh->port & (1 << USB_PORT_FEAT_SUSPEND)))
2273 continue;
2274
2275 dbg("resume port = %d", port);
2276 rh->port &= ~(1 << USB_PORT_FEAT_SUSPEND);
2277 rh->port |= 1 << USB_PORT_FEAT_C_SUSPEND;
2278 r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg);
2279 msleep(50);
2280 r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg);
2281 }
2282
2283 return 0;
2284
2285 }
2286 #else
2287 #define r8a66597_bus_suspend NULL
2288 #define r8a66597_bus_resume NULL
2289 #endif
2290
2291 static struct hc_driver r8a66597_hc_driver = {
2292 .description = hcd_name,
2293 .hcd_priv_size = sizeof(struct r8a66597),
2294 .irq = r8a66597_irq,
2295
2296 /*
2297 * generic hardware linkage
2298 */
2299 .flags = HCD_USB2,
2300
2301 .start = r8a66597_start,
2302 .stop = r8a66597_stop,
2303
2304 /*
2305 * managing i/o requests and associated device resources
2306 */
2307 .urb_enqueue = r8a66597_urb_enqueue,
2308 .urb_dequeue = r8a66597_urb_dequeue,
2309 .endpoint_disable = r8a66597_endpoint_disable,
2310
2311 /*
2312 * periodic schedule support
2313 */
2314 .get_frame_number = r8a66597_get_frame,
2315
2316 /*
2317 * root hub support
2318 */
2319 .hub_status_data = r8a66597_hub_status_data,
2320 .hub_control = r8a66597_hub_control,
2321 .bus_suspend = r8a66597_bus_suspend,
2322 .bus_resume = r8a66597_bus_resume,
2323 };
2324
2325 #if defined(CONFIG_PM)
2326 static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state)
2327 {
2328 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
2329 int port;
2330
2331 dbg("%s", __func__);
2332
2333 disable_controller(r8a66597);
2334
2335 for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
2336 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2337
2338 rh->port = 0x00000000;
2339 }
2340
2341 return 0;
2342 }
2343
2344 static int r8a66597_resume(struct platform_device *pdev)
2345 {
2346 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
2347 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
2348
2349 dbg("%s", __func__);
2350
2351 enable_controller(r8a66597);
2352 usb_root_hub_lost_power(hcd->self.root_hub);
2353
2354 return 0;
2355 }
2356 #else /* if defined(CONFIG_PM) */
2357 #define r8a66597_suspend NULL
2358 #define r8a66597_resume NULL
2359 #endif
2360
2361 static int __init_or_module r8a66597_remove(struct platform_device *pdev)
2362 {
2363 struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
2364 struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
2365
2366 del_timer_sync(&r8a66597->rh_timer);
2367 usb_remove_hcd(hcd);
2368 iounmap((void *)r8a66597->reg);
2369 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
2370 clk_put(r8a66597->clk);
2371 #endif
2372 usb_put_hcd(hcd);
2373 return 0;
2374 }
2375
2376 static int __init r8a66597_probe(struct platform_device *pdev)
2377 {
2378 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
2379 char clk_name[8];
2380 #endif
2381 struct resource *res = NULL, *ires;
2382 int irq = -1;
2383 void __iomem *reg = NULL;
2384 struct usb_hcd *hcd = NULL;
2385 struct r8a66597 *r8a66597;
2386 int ret = 0;
2387 int i;
2388 unsigned long irq_trigger;
2389
2390 if (pdev->dev.dma_mask) {
2391 ret = -EINVAL;
2392 dev_err(&pdev->dev, "dma not supported\n");
2393 goto clean_up;
2394 }
2395
2396 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2397 if (!res) {
2398 ret = -ENODEV;
2399 dev_err(&pdev->dev, "platform_get_resource error.\n");
2400 goto clean_up;
2401 }
2402
2403 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2404 if (!ires) {
2405 ret = -ENODEV;
2406 dev_err(&pdev->dev,
2407 "platform_get_resource IORESOURCE_IRQ error.\n");
2408 goto clean_up;
2409 }
2410
2411 irq = ires->start;
2412 irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
2413
2414 reg = ioremap(res->start, resource_size(res));
2415 if (reg == NULL) {
2416 ret = -ENOMEM;
2417 dev_err(&pdev->dev, "ioremap error.\n");
2418 goto clean_up;
2419 }
2420
2421 /* initialize hcd */
2422 hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
2423 if (!hcd) {
2424 ret = -ENOMEM;
2425 dev_err(&pdev->dev, "Failed to create hcd\n");
2426 goto clean_up;
2427 }
2428 r8a66597 = hcd_to_r8a66597(hcd);
2429 memset(r8a66597, 0, sizeof(struct r8a66597));
2430 dev_set_drvdata(&pdev->dev, r8a66597);
2431
2432 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
2433 snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
2434 r8a66597->clk = clk_get(&pdev->dev, clk_name);
2435 if (IS_ERR(r8a66597->clk)) {
2436 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
2437 ret = PTR_ERR(r8a66597->clk);
2438 goto clean_up2;
2439 }
2440 #endif
2441
2442 spin_lock_init(&r8a66597->lock);
2443 init_timer(&r8a66597->rh_timer);
2444 r8a66597->rh_timer.function = r8a66597_timer;
2445 r8a66597->rh_timer.data = (unsigned long)r8a66597;
2446 r8a66597->reg = (unsigned long)reg;
2447
2448 for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
2449 INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
2450 init_timer(&r8a66597->td_timer[i]);
2451 r8a66597->td_timer[i].function = r8a66597_td_timer;
2452 r8a66597->td_timer[i].data = (unsigned long)r8a66597;
2453 setup_timer(&r8a66597->interval_timer[i],
2454 r8a66597_interval_timer,
2455 (unsigned long)r8a66597);
2456 }
2457 INIT_LIST_HEAD(&r8a66597->child_device);
2458
2459 hcd->rsrc_start = res->start;
2460
2461 /* irq_sense setting on cmdline takes precedence over resource
2462 * settings, so the introduction of irqflags in IRQ resourse
2463 * won't disturb existing setups */
2464 switch (irq_sense) {
2465 case INTL:
2466 irq_trigger = IRQF_TRIGGER_LOW;
2467 break;
2468 case 0:
2469 irq_trigger = IRQF_TRIGGER_FALLING;
2470 break;
2471 case 0xff:
2472 if (irq_trigger)
2473 irq_sense = (irq_trigger & IRQF_TRIGGER_LOW) ?
2474 INTL : 0;
2475 else {
2476 irq_sense = INTL;
2477 irq_trigger = IRQF_TRIGGER_LOW;
2478 }
2479 break;
2480 default:
2481 dev_err(&pdev->dev, "Unknown irq_sense value.\n");
2482 }
2483
2484 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | irq_trigger);
2485 if (ret != 0) {
2486 dev_err(&pdev->dev, "Failed to add hcd\n");
2487 goto clean_up3;
2488 }
2489
2490 return 0;
2491
2492 clean_up3:
2493 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
2494 clk_put(r8a66597->clk);
2495 clean_up2:
2496 #endif
2497 usb_put_hcd(hcd);
2498
2499 clean_up:
2500 if (reg)
2501 iounmap(reg);
2502
2503 return ret;
2504 }
2505
2506 static struct platform_driver r8a66597_driver = {
2507 .probe = r8a66597_probe,
2508 .remove = r8a66597_remove,
2509 .suspend = r8a66597_suspend,
2510 .resume = r8a66597_resume,
2511 .driver = {
2512 .name = (char *) hcd_name,
2513 .owner = THIS_MODULE,
2514 },
2515 };
2516
2517 static int __init r8a66597_init(void)
2518 {
2519 if (usb_disabled())
2520 return -ENODEV;
2521
2522 printk(KERN_INFO KBUILD_MODNAME ": driver %s, %s\n", hcd_name,
2523 DRIVER_VERSION);
2524 return platform_driver_register(&r8a66597_driver);
2525 }
2526 module_init(r8a66597_init);
2527
2528 static void __exit r8a66597_cleanup(void)
2529 {
2530 platform_driver_unregister(&r8a66597_driver);
2531 }
2532 module_exit(r8a66597_cleanup);
2533
Support for the Chinese Samsung S3C2440 based development boards