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81#undef DEBUG
82
83#include <linux/module.h>
84#include <linux/ctype.h>
85#include <linux/init.h>
86#include <linux/interrupt.h>
87#include <linux/errno.h>
88#include <linux/kernel.h>
89#include <linux/delay.h>
90#include <linux/slab.h>
91#include <linux/blkdev.h>
92#include <linux/ata.h>
93#include <linux/hdreg.h>
94#include <linux/platform_device.h>
95#if defined(CONFIG_OF)
96#include <linux/of_device.h>
97#include <linux/of_platform.h>
98#endif
99
100MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
101MODULE_DESCRIPTION("Xilinx SystemACE device driver");
102MODULE_LICENSE("GPL");
103
104
105#define ACE_BUSMODE (0x00)
106
107#define ACE_STATUS (0x04)
108#define ACE_STATUS_CFGLOCK (0x00000001)
109#define ACE_STATUS_MPULOCK (0x00000002)
110#define ACE_STATUS_CFGERROR (0x00000004)
111#define ACE_STATUS_CFCERROR (0x00000008)
112#define ACE_STATUS_CFDETECT (0x00000010)
113#define ACE_STATUS_DATABUFRDY (0x00000020)
114#define ACE_STATUS_DATABUFMODE (0x00000040)
115#define ACE_STATUS_CFGDONE (0x00000080)
116#define ACE_STATUS_RDYFORCFCMD (0x00000100)
117#define ACE_STATUS_CFGMODEPIN (0x00000200)
118#define ACE_STATUS_CFGADDR_MASK (0x0000e000)
119#define ACE_STATUS_CFBSY (0x00020000)
120#define ACE_STATUS_CFRDY (0x00040000)
121#define ACE_STATUS_CFDWF (0x00080000)
122#define ACE_STATUS_CFDSC (0x00100000)
123#define ACE_STATUS_CFDRQ (0x00200000)
124#define ACE_STATUS_CFCORR (0x00400000)
125#define ACE_STATUS_CFERR (0x00800000)
126
127#define ACE_ERROR (0x08)
128#define ACE_CFGLBA (0x0c)
129#define ACE_MPULBA (0x10)
130
131#define ACE_SECCNTCMD (0x14)
132#define ACE_SECCNTCMD_RESET (0x0100)
133#define ACE_SECCNTCMD_IDENTIFY (0x0200)
134#define ACE_SECCNTCMD_READ_DATA (0x0300)
135#define ACE_SECCNTCMD_WRITE_DATA (0x0400)
136#define ACE_SECCNTCMD_ABORT (0x0600)
137
138#define ACE_VERSION (0x16)
139#define ACE_VERSION_REVISION_MASK (0x00FF)
140#define ACE_VERSION_MINOR_MASK (0x0F00)
141#define ACE_VERSION_MAJOR_MASK (0xF000)
142
143#define ACE_CTRL (0x18)
144#define ACE_CTRL_FORCELOCKREQ (0x0001)
145#define ACE_CTRL_LOCKREQ (0x0002)
146#define ACE_CTRL_FORCECFGADDR (0x0004)
147#define ACE_CTRL_FORCECFGMODE (0x0008)
148#define ACE_CTRL_CFGMODE (0x0010)
149#define ACE_CTRL_CFGSTART (0x0020)
150#define ACE_CTRL_CFGSEL (0x0040)
151#define ACE_CTRL_CFGRESET (0x0080)
152#define ACE_CTRL_DATABUFRDYIRQ (0x0100)
153#define ACE_CTRL_ERRORIRQ (0x0200)
154#define ACE_CTRL_CFGDONEIRQ (0x0400)
155#define ACE_CTRL_RESETIRQ (0x0800)
156#define ACE_CTRL_CFGPROG (0x1000)
157#define ACE_CTRL_CFGADDR_MASK (0xe000)
158
159#define ACE_FATSTAT (0x1c)
160
161#define ACE_NUM_MINORS 16
162#define ACE_SECTOR_SIZE (512)
163#define ACE_FIFO_SIZE (32)
164#define ACE_BUF_PER_SECTOR (ACE_SECTOR_SIZE / ACE_FIFO_SIZE)
165
166#define ACE_BUS_WIDTH_8 0
167#define ACE_BUS_WIDTH_16 1
168
169struct ace_reg_ops;
170
171struct ace_device {
172
173 int id;
174 int media_change;
175 int users;
176 struct list_head list;
177
178
179 struct tasklet_struct fsm_tasklet;
180 uint fsm_task;
181 uint fsm_state;
182 uint fsm_continue_flag;
183 uint fsm_iter_num;
184 struct timer_list stall_timer;
185
186
187 struct request *req;
188 void *data_ptr;
189 int data_count;
190 int data_result;
191
192 int id_req_count;
193 int id_result;
194 struct completion id_completion;
195 int in_irq;
196
197
198 resource_size_t physaddr;
199 void __iomem *baseaddr;
200 int irq;
201 int bus_width;
202 struct ace_reg_ops *reg_ops;
203 int lock_count;
204
205
206 spinlock_t lock;
207 struct device *dev;
208 struct request_queue *queue;
209 struct gendisk *gd;
210
211
212 u16 cf_id[ATA_ID_WORDS];
213};
214
215static int ace_major;
216
217
218
219
220
221struct ace_reg_ops {
222 u16(*in) (struct ace_device * ace, int reg);
223 void (*out) (struct ace_device * ace, int reg, u16 val);
224 void (*datain) (struct ace_device * ace);
225 void (*dataout) (struct ace_device * ace);
226};
227
228
229static u16 ace_in_8(struct ace_device *ace, int reg)
230{
231 void __iomem *r = ace->baseaddr + reg;
232 return in_8(r) | (in_8(r + 1) << 8);
233}
234
235static void ace_out_8(struct ace_device *ace, int reg, u16 val)
236{
237 void __iomem *r = ace->baseaddr + reg;
238 out_8(r, val);
239 out_8(r + 1, val >> 8);
240}
241
242static void ace_datain_8(struct ace_device *ace)
243{
244 void __iomem *r = ace->baseaddr + 0x40;
245 u8 *dst = ace->data_ptr;
246 int i = ACE_FIFO_SIZE;
247 while (i--)
248 *dst++ = in_8(r++);
249 ace->data_ptr = dst;
250}
251
252static void ace_dataout_8(struct ace_device *ace)
253{
254 void __iomem *r = ace->baseaddr + 0x40;
255 u8 *src = ace->data_ptr;
256 int i = ACE_FIFO_SIZE;
257 while (i--)
258 out_8(r++, *src++);
259 ace->data_ptr = src;
260}
261
262static struct ace_reg_ops ace_reg_8_ops = {
263 .in = ace_in_8,
264 .out = ace_out_8,
265 .datain = ace_datain_8,
266 .dataout = ace_dataout_8,
267};
268
269
270static u16 ace_in_be16(struct ace_device *ace, int reg)
271{
272 return in_be16(ace->baseaddr + reg);
273}
274
275static void ace_out_be16(struct ace_device *ace, int reg, u16 val)
276{
277 out_be16(ace->baseaddr + reg, val);
278}
279
280static void ace_datain_be16(struct ace_device *ace)
281{
282 int i = ACE_FIFO_SIZE / 2;
283 u16 *dst = ace->data_ptr;
284 while (i--)
285 *dst++ = in_le16(ace->baseaddr + 0x40);
286 ace->data_ptr = dst;
287}
288
289static void ace_dataout_be16(struct ace_device *ace)
290{
291 int i = ACE_FIFO_SIZE / 2;
292 u16 *src = ace->data_ptr;
293 while (i--)
294 out_le16(ace->baseaddr + 0x40, *src++);
295 ace->data_ptr = src;
296}
297
298
299static u16 ace_in_le16(struct ace_device *ace, int reg)
300{
301 return in_le16(ace->baseaddr + reg);
302}
303
304static void ace_out_le16(struct ace_device *ace, int reg, u16 val)
305{
306 out_le16(ace->baseaddr + reg, val);
307}
308
309static void ace_datain_le16(struct ace_device *ace)
310{
311 int i = ACE_FIFO_SIZE / 2;
312 u16 *dst = ace->data_ptr;
313 while (i--)
314 *dst++ = in_be16(ace->baseaddr + 0x40);
315 ace->data_ptr = dst;
316}
317
318static void ace_dataout_le16(struct ace_device *ace)
319{
320 int i = ACE_FIFO_SIZE / 2;
321 u16 *src = ace->data_ptr;
322 while (i--)
323 out_be16(ace->baseaddr + 0x40, *src++);
324 ace->data_ptr = src;
325}
326
327static struct ace_reg_ops ace_reg_be16_ops = {
328 .in = ace_in_be16,
329 .out = ace_out_be16,
330 .datain = ace_datain_be16,
331 .dataout = ace_dataout_be16,
332};
333
334static struct ace_reg_ops ace_reg_le16_ops = {
335 .in = ace_in_le16,
336 .out = ace_out_le16,
337 .datain = ace_datain_le16,
338 .dataout = ace_dataout_le16,
339};
340
341static inline u16 ace_in(struct ace_device *ace, int reg)
342{
343 return ace->reg_ops->in(ace, reg);
344}
345
346static inline u32 ace_in32(struct ace_device *ace, int reg)
347{
348 return ace_in(ace, reg) | (ace_in(ace, reg + 2) << 16);
349}
350
351static inline void ace_out(struct ace_device *ace, int reg, u16 val)
352{
353 ace->reg_ops->out(ace, reg, val);
354}
355
356static inline void ace_out32(struct ace_device *ace, int reg, u32 val)
357{
358 ace_out(ace, reg, val);
359 ace_out(ace, reg + 2, val >> 16);
360}
361
362
363
364
365
366#if defined(DEBUG)
367static void ace_dump_mem(void *base, int len)
368{
369 const char *ptr = base;
370 int i, j;
371
372 for (i = 0; i < len; i += 16) {
373 printk(KERN_INFO "%.8x:", i);
374 for (j = 0; j < 16; j++) {
375 if (!(j % 4))
376 printk(" ");
377 printk("%.2x", ptr[i + j]);
378 }
379 printk(" ");
380 for (j = 0; j < 16; j++)
381 printk("%c", isprint(ptr[i + j]) ? ptr[i + j] : '.');
382 printk("\n");
383 }
384}
385#else
386static inline void ace_dump_mem(void *base, int len)
387{
388}
389#endif
390
391static void ace_dump_regs(struct ace_device *ace)
392{
393 dev_info(ace->dev,
394 " ctrl: %.8x seccnt/cmd: %.4x ver:%.4x\n"
395 " status:%.8x mpu_lba:%.8x busmode:%4x\n"
396 " error: %.8x cfg_lba:%.8x fatstat:%.4x\n",
397 ace_in32(ace, ACE_CTRL),
398 ace_in(ace, ACE_SECCNTCMD),
399 ace_in(ace, ACE_VERSION),
400 ace_in32(ace, ACE_STATUS),
401 ace_in32(ace, ACE_MPULBA),
402 ace_in(ace, ACE_BUSMODE),
403 ace_in32(ace, ACE_ERROR),
404 ace_in32(ace, ACE_CFGLBA), ace_in(ace, ACE_FATSTAT));
405}
406
407void ace_fix_driveid(u16 *id)
408{
409#if defined(__BIG_ENDIAN)
410 int i;
411
412
413 for (i = 0; i < ATA_ID_WORDS; i++, id++)
414 *id = le16_to_cpu(*id);
415#endif
416}
417
418
419
420
421
422
423#define ACE_TASK_IDLE 0
424#define ACE_TASK_IDENTIFY 1
425#define ACE_TASK_READ 2
426#define ACE_TASK_WRITE 3
427#define ACE_FSM_NUM_TASKS 4
428
429
430#define ACE_FSM_STATE_IDLE 0
431#define ACE_FSM_STATE_REQ_LOCK 1
432#define ACE_FSM_STATE_WAIT_LOCK 2
433#define ACE_FSM_STATE_WAIT_CFREADY 3
434#define ACE_FSM_STATE_IDENTIFY_PREPARE 4
435#define ACE_FSM_STATE_IDENTIFY_TRANSFER 5
436#define ACE_FSM_STATE_IDENTIFY_COMPLETE 6
437#define ACE_FSM_STATE_REQ_PREPARE 7
438#define ACE_FSM_STATE_REQ_TRANSFER 8
439#define ACE_FSM_STATE_REQ_COMPLETE 9
440#define ACE_FSM_STATE_ERROR 10
441#define ACE_FSM_NUM_STATES 11
442
443
444static inline void ace_fsm_yield(struct ace_device *ace)
445{
446 dev_dbg(ace->dev, "ace_fsm_yield()\n");
447 tasklet_schedule(&ace->fsm_tasklet);
448 ace->fsm_continue_flag = 0;
449}
450
451
452static inline void ace_fsm_yieldirq(struct ace_device *ace)
453{
454 dev_dbg(ace->dev, "ace_fsm_yieldirq()\n");
455
456 if (ace->irq == NO_IRQ)
457
458 tasklet_schedule(&ace->fsm_tasklet);
459 ace->fsm_continue_flag = 0;
460}
461
462
463struct request *ace_get_next_request(struct request_queue * q)
464{
465 struct request *req;
466
467 while ((req = blk_peek_request(q)) != NULL) {
468 if (blk_fs_request(req))
469 break;
470 blk_start_request(req);
471 __blk_end_request_all(req, -EIO);
472 }
473 return req;
474}
475
476static void ace_fsm_dostate(struct ace_device *ace)
477{
478 struct request *req;
479 u32 status;
480 u16 val;
481 int count;
482
483#if defined(DEBUG)
484 dev_dbg(ace->dev, "fsm_state=%i, id_req_count=%i\n",
485 ace->fsm_state, ace->id_req_count);
486#endif
487
488
489
490 status = ace_in32(ace, ACE_STATUS);
491 if ((status & ACE_STATUS_CFDETECT) == 0) {
492 ace->fsm_state = ACE_FSM_STATE_IDLE;
493 ace->media_change = 1;
494 set_capacity(ace->gd, 0);
495 dev_info(ace->dev, "No CF in slot\n");
496
497
498 if (ace->req) {
499 __blk_end_request_all(ace->req, -EIO);
500 ace->req = NULL;
501 }
502 while ((req = blk_fetch_request(ace->queue)) != NULL)
503 __blk_end_request_all(req, -EIO);
504
505
506 ace->fsm_state = ACE_FSM_STATE_IDLE;
507 ace->id_result = -EIO;
508 while (ace->id_req_count) {
509 complete(&ace->id_completion);
510 ace->id_req_count--;
511 }
512 }
513
514 switch (ace->fsm_state) {
515 case ACE_FSM_STATE_IDLE:
516
517 if (ace->id_req_count || ace_get_next_request(ace->queue)) {
518 ace->fsm_iter_num++;
519 ace->fsm_state = ACE_FSM_STATE_REQ_LOCK;
520 mod_timer(&ace->stall_timer, jiffies + HZ);
521 if (!timer_pending(&ace->stall_timer))
522 add_timer(&ace->stall_timer);
523 break;
524 }
525 del_timer(&ace->stall_timer);
526 ace->fsm_continue_flag = 0;
527 break;
528
529 case ACE_FSM_STATE_REQ_LOCK:
530 if (ace_in(ace, ACE_STATUS) & ACE_STATUS_MPULOCK) {
531
532 ace->fsm_state = ACE_FSM_STATE_WAIT_CFREADY;
533 break;
534 }
535
536
537 val = ace_in(ace, ACE_CTRL);
538 ace_out(ace, ACE_CTRL, val | ACE_CTRL_LOCKREQ);
539 ace->fsm_state = ACE_FSM_STATE_WAIT_LOCK;
540 break;
541
542 case ACE_FSM_STATE_WAIT_LOCK:
543 if (ace_in(ace, ACE_STATUS) & ACE_STATUS_MPULOCK) {
544
545 ace->fsm_state = ACE_FSM_STATE_WAIT_CFREADY;
546 break;
547 }
548
549
550 ace_fsm_yield(ace);
551 break;
552
553 case ACE_FSM_STATE_WAIT_CFREADY:
554 status = ace_in32(ace, ACE_STATUS);
555 if (!(status & ACE_STATUS_RDYFORCFCMD) ||
556 (status & ACE_STATUS_CFBSY)) {
557
558 ace_fsm_yield(ace);
559 break;
560 }
561
562
563 if (ace->id_req_count)
564 ace->fsm_state = ACE_FSM_STATE_IDENTIFY_PREPARE;
565 else
566 ace->fsm_state = ACE_FSM_STATE_REQ_PREPARE;
567 break;
568
569 case ACE_FSM_STATE_IDENTIFY_PREPARE:
570
571 ace->fsm_task = ACE_TASK_IDENTIFY;
572 ace->data_ptr = ace->cf_id;
573 ace->data_count = ACE_BUF_PER_SECTOR;
574 ace_out(ace, ACE_SECCNTCMD, ACE_SECCNTCMD_IDENTIFY);
575
576
577 val = ace_in(ace, ACE_CTRL);
578 ace_out(ace, ACE_CTRL, val | ACE_CTRL_CFGRESET);
579
580
581
582 ace->fsm_state = ACE_FSM_STATE_IDENTIFY_TRANSFER;
583 ace_fsm_yieldirq(ace);
584 break;
585
586 case ACE_FSM_STATE_IDENTIFY_TRANSFER:
587
588 status = ace_in32(ace, ACE_STATUS);
589 if (status & ACE_STATUS_CFBSY) {
590 dev_dbg(ace->dev, "CFBSY set; t=%i iter=%i dc=%i\n",
591 ace->fsm_task, ace->fsm_iter_num,
592 ace->data_count);
593 ace_fsm_yield(ace);
594 break;
595 }
596 if (!(status & ACE_STATUS_DATABUFRDY)) {
597 ace_fsm_yield(ace);
598 break;
599 }
600
601
602 ace->reg_ops->datain(ace);
603 ace->data_count--;
604
605
606 if (ace->data_count != 0) {
607 ace_fsm_yieldirq(ace);
608 break;
609 }
610
611
612 dev_dbg(ace->dev, "identify finished\n");
613 ace->fsm_state = ACE_FSM_STATE_IDENTIFY_COMPLETE;
614 break;
615
616 case ACE_FSM_STATE_IDENTIFY_COMPLETE:
617 ace_fix_driveid(ace->cf_id);
618 ace_dump_mem(ace->cf_id, 512);
619
620 if (ace->data_result) {
621
622 ace->media_change = 1;
623 set_capacity(ace->gd, 0);
624 dev_err(ace->dev, "error fetching CF id (%i)\n",
625 ace->data_result);
626 } else {
627 ace->media_change = 0;
628
629
630 set_capacity(ace->gd,
631 ata_id_u32(ace->cf_id, ATA_ID_LBA_CAPACITY));
632 dev_info(ace->dev, "capacity: %i sectors\n",
633 ata_id_u32(ace->cf_id, ATA_ID_LBA_CAPACITY));
634 }
635
636
637 ace->fsm_state = ACE_FSM_STATE_IDLE;
638 ace->id_result = ace->data_result;
639 while (ace->id_req_count) {
640 complete(&ace->id_completion);
641 ace->id_req_count--;
642 }
643 break;
644
645 case ACE_FSM_STATE_REQ_PREPARE:
646 req = ace_get_next_request(ace->queue);
647 if (!req) {
648 ace->fsm_state = ACE_FSM_STATE_IDLE;
649 break;
650 }
651 blk_start_request(req);
652
653
654 dev_dbg(ace->dev,
655 "request: sec=%llx hcnt=%x, ccnt=%x, dir=%i\n",
656 (unsigned long long)blk_rq_pos(req),
657 blk_rq_sectors(req), blk_rq_cur_sectors(req),
658 rq_data_dir(req));
659
660 ace->req = req;
661 ace->data_ptr = req->buffer;
662 ace->data_count = blk_rq_cur_sectors(req) * ACE_BUF_PER_SECTOR;
663 ace_out32(ace, ACE_MPULBA, blk_rq_pos(req) & 0x0FFFFFFF);
664
665 count = blk_rq_sectors(req);
666 if (rq_data_dir(req)) {
667
668 dev_dbg(ace->dev, "write data\n");
669 ace->fsm_task = ACE_TASK_WRITE;
670 ace_out(ace, ACE_SECCNTCMD,
671 count | ACE_SECCNTCMD_WRITE_DATA);
672 } else {
673
674 dev_dbg(ace->dev, "read data\n");
675 ace->fsm_task = ACE_TASK_READ;
676 ace_out(ace, ACE_SECCNTCMD,
677 count | ACE_SECCNTCMD_READ_DATA);
678 }
679
680
681 val = ace_in(ace, ACE_CTRL);
682 ace_out(ace, ACE_CTRL, val | ACE_CTRL_CFGRESET);
683
684
685
686
687 ace->fsm_state = ACE_FSM_STATE_REQ_TRANSFER;
688 if (ace->fsm_task == ACE_TASK_READ)
689 ace_fsm_yieldirq(ace);
690 break;
691
692 case ACE_FSM_STATE_REQ_TRANSFER:
693
694 status = ace_in32(ace, ACE_STATUS);
695 if (status & ACE_STATUS_CFBSY) {
696 dev_dbg(ace->dev,
697 "CFBSY set; t=%i iter=%i c=%i dc=%i irq=%i\n",
698 ace->fsm_task, ace->fsm_iter_num,
699 blk_rq_cur_sectors(ace->req) * 16,
700 ace->data_count, ace->in_irq);
701 ace_fsm_yield(ace);
702 break;
703 }
704 if (!(status & ACE_STATUS_DATABUFRDY)) {
705 dev_dbg(ace->dev,
706 "DATABUF not set; t=%i iter=%i c=%i dc=%i irq=%i\n",
707 ace->fsm_task, ace->fsm_iter_num,
708 blk_rq_cur_sectors(ace->req) * 16,
709 ace->data_count, ace->in_irq);
710 ace_fsm_yieldirq(ace);
711 break;
712 }
713
714
715 if (ace->fsm_task == ACE_TASK_WRITE)
716 ace->reg_ops->dataout(ace);
717 else
718 ace->reg_ops->datain(ace);
719 ace->data_count--;
720
721
722 if (ace->data_count != 0) {
723 ace_fsm_yieldirq(ace);
724 break;
725 }
726
727
728 if (__blk_end_request_cur(ace->req, 0)) {
729
730
731
732
733 ace->data_ptr = ace->req->buffer;
734 ace->data_count = blk_rq_cur_sectors(ace->req) * 16;
735 ace_fsm_yieldirq(ace);
736 break;
737 }
738
739 ace->fsm_state = ACE_FSM_STATE_REQ_COMPLETE;
740 break;
741
742 case ACE_FSM_STATE_REQ_COMPLETE:
743 ace->req = NULL;
744
745
746 ace->fsm_state = ACE_FSM_STATE_IDLE;
747 break;
748
749 default:
750 ace->fsm_state = ACE_FSM_STATE_IDLE;
751 break;
752 }
753}
754
755static void ace_fsm_tasklet(unsigned long data)
756{
757 struct ace_device *ace = (void *)data;
758 unsigned long flags;
759
760 spin_lock_irqsave(&ace->lock, flags);
761
762
763 ace->fsm_continue_flag = 1;
764 while (ace->fsm_continue_flag)
765 ace_fsm_dostate(ace);
766
767 spin_unlock_irqrestore(&ace->lock, flags);
768}
769
770static void ace_stall_timer(unsigned long data)
771{
772 struct ace_device *ace = (void *)data;
773 unsigned long flags;
774
775 dev_warn(ace->dev,
776 "kicking stalled fsm; state=%i task=%i iter=%i dc=%i\n",
777 ace->fsm_state, ace->fsm_task, ace->fsm_iter_num,
778 ace->data_count);
779 spin_lock_irqsave(&ace->lock, flags);
780
781
782
783 mod_timer(&ace->stall_timer, jiffies + HZ);
784
785
786 ace->fsm_continue_flag = 1;
787 while (ace->fsm_continue_flag)
788 ace_fsm_dostate(ace);
789
790 spin_unlock_irqrestore(&ace->lock, flags);
791}
792
793
794
795
796static int ace_interrupt_checkstate(struct ace_device *ace)
797{
798 u32 sreg = ace_in32(ace, ACE_STATUS);
799 u16 creg = ace_in(ace, ACE_CTRL);
800
801
802 if ((sreg & (ACE_STATUS_CFGERROR | ACE_STATUS_CFCERROR)) &&
803 (creg & ACE_CTRL_ERRORIRQ)) {
804 dev_err(ace->dev, "transfer failure\n");
805 ace_dump_regs(ace);
806 return -EIO;
807 }
808
809 return 0;
810}
811
812static irqreturn_t ace_interrupt(int irq, void *dev_id)
813{
814 u16 creg;
815 struct ace_device *ace = dev_id;
816
817
818 spin_lock(&ace->lock);
819 ace->in_irq = 1;
820
821
822 creg = ace_in(ace, ACE_CTRL);
823 ace_out(ace, ACE_CTRL, creg | ACE_CTRL_RESETIRQ);
824 ace_out(ace, ACE_CTRL, creg);
825
826
827 if (ace_interrupt_checkstate(ace))
828 ace->data_result = -EIO;
829
830 if (ace->fsm_task == 0) {
831 dev_err(ace->dev,
832 "spurious irq; stat=%.8x ctrl=%.8x cmd=%.4x\n",
833 ace_in32(ace, ACE_STATUS), ace_in32(ace, ACE_CTRL),
834 ace_in(ace, ACE_SECCNTCMD));
835 dev_err(ace->dev, "fsm_task=%i fsm_state=%i data_count=%i\n",
836 ace->fsm_task, ace->fsm_state, ace->data_count);
837 }
838
839
840 ace->fsm_continue_flag = 1;
841 while (ace->fsm_continue_flag)
842 ace_fsm_dostate(ace);
843
844
845 ace->in_irq = 0;
846 spin_unlock(&ace->lock);
847
848 return IRQ_HANDLED;
849}
850
851
852
853
854static void ace_request(struct request_queue * q)
855{
856 struct request *req;
857 struct ace_device *ace;
858
859 req = ace_get_next_request(q);
860
861 if (req) {
862 ace = req->rq_disk->private_data;
863 tasklet_schedule(&ace->fsm_tasklet);
864 }
865}
866
867static int ace_media_changed(struct gendisk *gd)
868{
869 struct ace_device *ace = gd->private_data;
870 dev_dbg(ace->dev, "ace_media_changed(): %i\n", ace->media_change);
871
872 return ace->media_change;
873}
874
875static int ace_revalidate_disk(struct gendisk *gd)
876{
877 struct ace_device *ace = gd->private_data;
878 unsigned long flags;
879
880 dev_dbg(ace->dev, "ace_revalidate_disk()\n");
881
882 if (ace->media_change) {
883 dev_dbg(ace->dev, "requesting cf id and scheduling tasklet\n");
884
885 spin_lock_irqsave(&ace->lock, flags);
886 ace->id_req_count++;
887 spin_unlock_irqrestore(&ace->lock, flags);
888
889 tasklet_schedule(&ace->fsm_tasklet);
890 wait_for_completion(&ace->id_completion);
891 }
892
893 dev_dbg(ace->dev, "revalidate complete\n");
894 return ace->id_result;
895}
896
897static int ace_open(struct block_device *bdev, fmode_t mode)
898{
899 struct ace_device *ace = bdev->bd_disk->private_data;
900 unsigned long flags;
901
902 dev_dbg(ace->dev, "ace_open() users=%i\n", ace->users + 1);
903
904 spin_lock_irqsave(&ace->lock, flags);
905 ace->users++;
906 spin_unlock_irqrestore(&ace->lock, flags);
907
908 check_disk_change(bdev);
909 return 0;
910}
911
912static int ace_release(struct gendisk *disk, fmode_t mode)
913{
914 struct ace_device *ace = disk->private_data;
915 unsigned long flags;
916 u16 val;
917
918 dev_dbg(ace->dev, "ace_release() users=%i\n", ace->users - 1);
919
920 spin_lock_irqsave(&ace->lock, flags);
921 ace->users--;
922 if (ace->users == 0) {
923 val = ace_in(ace, ACE_CTRL);
924 ace_out(ace, ACE_CTRL, val & ~ACE_CTRL_LOCKREQ);
925 }
926 spin_unlock_irqrestore(&ace->lock, flags);
927 return 0;
928}
929
930static int ace_getgeo(struct block_device *bdev, struct hd_geometry *geo)
931{
932 struct ace_device *ace = bdev->bd_disk->private_data;
933 u16 *cf_id = ace->cf_id;
934
935 dev_dbg(ace->dev, "ace_getgeo()\n");
936
937 geo->heads = cf_id[ATA_ID_HEADS];
938 geo->sectors = cf_id[ATA_ID_SECTORS];
939 geo->cylinders = cf_id[ATA_ID_CYLS];
940
941 return 0;
942}
943
944static const struct block_device_operations ace_fops = {
945 .owner = THIS_MODULE,
946 .open = ace_open,
947 .release = ace_release,
948 .media_changed = ace_media_changed,
949 .revalidate_disk = ace_revalidate_disk,
950 .getgeo = ace_getgeo,
951};
952
953
954
955
956static int __devinit ace_setup(struct ace_device *ace)
957{
958 u16 version;
959 u16 val;
960 int rc;
961
962 dev_dbg(ace->dev, "ace_setup(ace=0x%p)\n", ace);
963 dev_dbg(ace->dev, "physaddr=0x%llx irq=%i\n",
964 (unsigned long long)ace->physaddr, ace->irq);
965
966 spin_lock_init(&ace->lock);
967 init_completion(&ace->id_completion);
968
969
970
971
972 ace->baseaddr = ioremap(ace->physaddr, 0x80);
973 if (!ace->baseaddr)
974 goto err_ioremap;
975
976
977
978
979 tasklet_init(&ace->fsm_tasklet, ace_fsm_tasklet, (unsigned long)ace);
980 setup_timer(&ace->stall_timer, ace_stall_timer, (unsigned long)ace);
981
982
983
984
985 ace->queue = blk_init_queue(ace_request, &ace->lock);
986 if (ace->queue == NULL)
987 goto err_blk_initq;
988 blk_queue_logical_block_size(ace->queue, 512);
989
990
991
992
993 ace->gd = alloc_disk(ACE_NUM_MINORS);
994 if (!ace->gd)
995 goto err_alloc_disk;
996
997 ace->gd->major = ace_major;
998 ace->gd->first_minor = ace->id * ACE_NUM_MINORS;
999 ace->gd->fops = &ace_fops;
1000 ace->gd->queue = ace->queue;
1001 ace->gd->private_data = ace;
1002 snprintf(ace->gd->disk_name, 32, "xs%c", ace->id + 'a');
1003
1004
1005 if (ace->bus_width == ACE_BUS_WIDTH_16) {
1006
1007 ace_out_le16(ace, ACE_BUSMODE, 0x0101);
1008
1009
1010 if (ace_in_le16(ace, ACE_BUSMODE) == 0x0001)
1011 ace->reg_ops = &ace_reg_le16_ops;
1012 else
1013 ace->reg_ops = &ace_reg_be16_ops;
1014 } else {
1015 ace_out_8(ace, ACE_BUSMODE, 0x00);
1016 ace->reg_ops = &ace_reg_8_ops;
1017 }
1018
1019
1020 version = ace_in(ace, ACE_VERSION);
1021 if ((version == 0) || (version == 0xFFFF))
1022 goto err_read;
1023
1024
1025 ace_out(ace, ACE_CTRL, ACE_CTRL_FORCECFGMODE |
1026 ACE_CTRL_DATABUFRDYIRQ | ACE_CTRL_ERRORIRQ);
1027
1028
1029 if (ace->irq != NO_IRQ) {
1030 rc = request_irq(ace->irq, ace_interrupt, 0, "systemace", ace);
1031 if (rc) {
1032
1033 dev_err(ace->dev, "request_irq failed\n");
1034 ace->irq = NO_IRQ;
1035 }
1036 }
1037
1038
1039 val = ace_in(ace, ACE_CTRL);
1040 val |= ACE_CTRL_DATABUFRDYIRQ | ACE_CTRL_ERRORIRQ;
1041 ace_out(ace, ACE_CTRL, val);
1042
1043
1044 dev_info(ace->dev, "Xilinx SystemACE revision %i.%i.%i\n",
1045 (version >> 12) & 0xf, (version >> 8) & 0x0f, version & 0xff);
1046 dev_dbg(ace->dev, "physaddr 0x%llx, mapped to 0x%p, irq=%i\n",
1047 (unsigned long long) ace->physaddr, ace->baseaddr, ace->irq);
1048
1049 ace->media_change = 1;
1050 ace_revalidate_disk(ace->gd);
1051
1052
1053 add_disk(ace->gd);
1054
1055 return 0;
1056
1057err_read:
1058 put_disk(ace->gd);
1059err_alloc_disk:
1060 blk_cleanup_queue(ace->queue);
1061err_blk_initq:
1062 iounmap(ace->baseaddr);
1063err_ioremap:
1064 dev_info(ace->dev, "xsysace: error initializing device at 0x%llx\n",
1065 (unsigned long long) ace->physaddr);
1066 return -ENOMEM;
1067}
1068
1069static void __devexit ace_teardown(struct ace_device *ace)
1070{
1071 if (ace->gd) {
1072 del_gendisk(ace->gd);
1073 put_disk(ace->gd);
1074 }
1075
1076 if (ace->queue)
1077 blk_cleanup_queue(ace->queue);
1078
1079 tasklet_kill(&ace->fsm_tasklet);
1080
1081 if (ace->irq != NO_IRQ)
1082 free_irq(ace->irq, ace);
1083
1084 iounmap(ace->baseaddr);
1085}
1086
1087static int __devinit
1088ace_alloc(struct device *dev, int id, resource_size_t physaddr,
1089 int irq, int bus_width)
1090{
1091 struct ace_device *ace;
1092 int rc;
1093 dev_dbg(dev, "ace_alloc(%p)\n", dev);
1094
1095 if (!physaddr) {
1096 rc = -ENODEV;
1097 goto err_noreg;
1098 }
1099
1100
1101 ace = kzalloc(sizeof(struct ace_device), GFP_KERNEL);
1102 if (!ace) {
1103 rc = -ENOMEM;
1104 goto err_alloc;
1105 }
1106
1107 ace->dev = dev;
1108 ace->id = id;
1109 ace->physaddr = physaddr;
1110 ace->irq = irq;
1111 ace->bus_width = bus_width;
1112
1113
1114 rc = ace_setup(ace);
1115 if (rc)
1116 goto err_setup;
1117
1118 dev_set_drvdata(dev, ace);
1119 return 0;
1120
1121err_setup:
1122 dev_set_drvdata(dev, NULL);
1123 kfree(ace);
1124err_alloc:
1125err_noreg:
1126 dev_err(dev, "could not initialize device, err=%i\n", rc);
1127 return rc;
1128}
1129
1130static void __devexit ace_free(struct device *dev)
1131{
1132 struct ace_device *ace = dev_get_drvdata(dev);
1133 dev_dbg(dev, "ace_free(%p)\n", dev);
1134
1135 if (ace) {
1136 ace_teardown(ace);
1137 dev_set_drvdata(dev, NULL);
1138 kfree(ace);
1139 }
1140}
1141
1142
1143
1144
1145
1146static int __devinit ace_probe(struct platform_device *dev)
1147{
1148 resource_size_t physaddr = 0;
1149 int bus_width = ACE_BUS_WIDTH_16;
1150 int id = dev->id;
1151 int irq = NO_IRQ;
1152 int i;
1153
1154 dev_dbg(&dev->dev, "ace_probe(%p)\n", dev);
1155
1156 for (i = 0; i < dev->num_resources; i++) {
1157 if (dev->resource[i].flags & IORESOURCE_MEM)
1158 physaddr = dev->resource[i].start;
1159 if (dev->resource[i].flags & IORESOURCE_IRQ)
1160 irq = dev->resource[i].start;
1161 }
1162
1163
1164 return ace_alloc(&dev->dev, id, physaddr, irq, bus_width);
1165}
1166
1167
1168
1169
1170static int __devexit ace_remove(struct platform_device *dev)
1171{
1172 ace_free(&dev->dev);
1173 return 0;
1174}
1175
1176static struct platform_driver ace_platform_driver = {
1177 .probe = ace_probe,
1178 .remove = __devexit_p(ace_remove),
1179 .driver = {
1180 .owner = THIS_MODULE,
1181 .name = "xsysace",
1182 },
1183};
1184
1185
1186
1187
1188
1189#if defined(CONFIG_OF)
1190static int __devinit
1191ace_of_probe(struct of_device *op, const struct of_device_id *match)
1192{
1193 struct resource res;
1194 resource_size_t physaddr;
1195 const u32 *id;
1196 int irq, bus_width, rc;
1197
1198 dev_dbg(&op->dev, "ace_of_probe(%p, %p)\n", op, match);
1199
1200
1201 id = of_get_property(op->node, "port-number", NULL);
1202
1203
1204 rc = of_address_to_resource(op->node, 0, &res);
1205 if (rc) {
1206 dev_err(&op->dev, "invalid address\n");
1207 return rc;
1208 }
1209 physaddr = res.start;
1210
1211
1212 irq = irq_of_parse_and_map(op->node, 0);
1213
1214
1215 bus_width = ACE_BUS_WIDTH_16;
1216 if (of_find_property(op->node, "8-bit", NULL))
1217 bus_width = ACE_BUS_WIDTH_8;
1218
1219
1220 return ace_alloc(&op->dev, id ? *id : 0, physaddr, irq, bus_width);
1221}
1222
1223static int __devexit ace_of_remove(struct of_device *op)
1224{
1225 ace_free(&op->dev);
1226 return 0;
1227}
1228
1229
1230static struct of_device_id ace_of_match[] __devinitdata = {
1231 { .compatible = "xlnx,opb-sysace-1.00.b", },
1232 { .compatible = "xlnx,opb-sysace-1.00.c", },
1233 { .compatible = "xlnx,xps-sysace-1.00.a", },
1234 { .compatible = "xlnx,sysace", },
1235 {},
1236};
1237MODULE_DEVICE_TABLE(of, ace_of_match);
1238
1239static struct of_platform_driver ace_of_driver = {
1240 .owner = THIS_MODULE,
1241 .name = "xsysace",
1242 .match_table = ace_of_match,
1243 .probe = ace_of_probe,
1244 .remove = __devexit_p(ace_of_remove),
1245 .driver = {
1246 .name = "xsysace",
1247 },
1248};
1249
1250
1251static inline int __init ace_of_register(void)
1252{
1253 pr_debug("xsysace: registering OF binding\n");
1254 return of_register_platform_driver(&ace_of_driver);
1255}
1256
1257static inline void __exit ace_of_unregister(void)
1258{
1259 of_unregister_platform_driver(&ace_of_driver);
1260}
1261#else
1262
1263static inline int __init ace_of_register(void) { return 0; }
1264static inline void __exit ace_of_unregister(void) { }
1265#endif
1266
1267
1268
1269
1270static int __init ace_init(void)
1271{
1272 int rc;
1273
1274 ace_major = register_blkdev(ace_major, "xsysace");
1275 if (ace_major <= 0) {
1276 rc = -ENOMEM;
1277 goto err_blk;
1278 }
1279
1280 rc = ace_of_register();
1281 if (rc)
1282 goto err_of;
1283
1284 pr_debug("xsysace: registering platform binding\n");
1285 rc = platform_driver_register(&ace_platform_driver);
1286 if (rc)
1287 goto err_plat;
1288
1289 pr_info("Xilinx SystemACE device driver, major=%i\n", ace_major);
1290 return 0;
1291
1292err_plat:
1293 ace_of_unregister();
1294err_of:
1295 unregister_blkdev(ace_major, "xsysace");
1296err_blk:
1297 printk(KERN_ERR "xsysace: registration failed; err=%i\n", rc);
1298 return rc;
1299}
1300
1301static void __exit ace_exit(void)
1302{
1303 pr_debug("Unregistering Xilinx SystemACE driver\n");
1304 platform_driver_unregister(&ace_platform_driver);
1305 ace_of_unregister();
1306 unregister_blkdev(ace_major, "xsysace");
1307}
1308
1309module_init(ace_init);
1310module_exit(ace_exit);
1311