?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] v4l: 776: added card 75 avermedia avertvhd mce a180
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / libata.h
blobdcd17e7458ab602684db8cc965006267969e028f
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <asm/io.h>
33 #include <linux/ata.h>
34 #include <linux/workqueue.h>
35
36 /*
37 * compile-time options
38 */
39 #undef ATA_DEBUG /* debugging output */
40 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
41 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
42 #undef ATA_NDEBUG /* define to disable quick runtime checks */
43 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
44 * low-level drivers */
45 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
46
47
48 /* note: prints function name for you */
49 #ifdef ATA_DEBUG
50 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
51 #ifdef ATA_VERBOSE_DEBUG
52 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53 #else
54 #define VPRINTK(fmt, args...)
55 #endif /* ATA_VERBOSE_DEBUG */
56 #else
57 #define DPRINTK(fmt, args...)
58 #define VPRINTK(fmt, args...)
59 #endif /* ATA_DEBUG */
60
61 #ifdef ATA_NDEBUG
62 #define assert(expr)
63 #else
64 #define assert(expr) \
65 if(unlikely(!(expr))) { \
66 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
67 #expr,__FILE__,__FUNCTION__,__LINE__); \
68 }
69 #endif
70
71 /* defines only for the constants which don't work well as enums */
72 #define ATA_TAG_POISON 0xfafbfcfdU
73
74 /* move to PCI layer? */
75 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
76 {
77 return &pdev->dev;
78 }
79
80 enum {
81 /* various global constants */
82 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
83 ATA_MAX_PORTS = 8,
84 ATA_DEF_QUEUE = 1,
85 ATA_MAX_QUEUE = 1,
86 ATA_MAX_SECTORS = 200, /* FIXME */
87 ATA_MAX_BUS = 2,
88 ATA_DEF_BUSY_WAIT = 10000,
89 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
90
91 ATA_SHT_EMULATED = 1,
92 ATA_SHT_CMD_PER_LUN = 1,
93 ATA_SHT_THIS_ID = -1,
94 ATA_SHT_USE_CLUSTERING = 1,
95
96 /* struct ata_device stuff */
97 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
98 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
99 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
100 ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */
101
102 ATA_DEV_UNKNOWN = 0, /* unknown device */
103 ATA_DEV_ATA = 1, /* ATA device */
104 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
105 ATA_DEV_ATAPI = 3, /* ATAPI device */
106 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
107 ATA_DEV_NONE = 5, /* no device */
108
109 /* struct ata_port flags */
110 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
111 /* (doesn't imply presence) */
112 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
113 ATA_FLAG_SATA = (1 << 3),
114 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
115 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
116 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
117 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
118 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
119 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
120 * proper HSM is in place. */
121
122 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
123 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
124 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
125 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
126
127 /* various lengths of time */
128 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
129 ATA_TMOUT_PIO = 30 * HZ,
130 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
131 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
132 ATA_TMOUT_CDB = 30 * HZ,
133 ATA_TMOUT_CDB_QUICK = 5 * HZ,
134
135 /* ATA bus states */
136 BUS_UNKNOWN = 0,
137 BUS_DMA = 1,
138 BUS_IDLE = 2,
139 BUS_NOINTR = 3,
140 BUS_NODATA = 4,
141 BUS_TIMER = 5,
142 BUS_PIO = 6,
143 BUS_EDD = 7,
144 BUS_IDENTIFY = 8,
145 BUS_PACKET = 9,
146
147 /* SATA port states */
148 PORT_UNKNOWN = 0,
149 PORT_ENABLED = 1,
150 PORT_DISABLED = 2,
151
152 /* encoding various smaller bitmaps into a single
153 * unsigned long bitmap
154 */
155 ATA_SHIFT_UDMA = 0,
156 ATA_SHIFT_MWDMA = 8,
157 ATA_SHIFT_PIO = 11,
158
159 /* size of buffer to pad xfers ending on unaligned boundaries */
160 ATA_DMA_PAD_SZ = 4,
161 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
162
163 /* Masks for port functions */
164 ATA_PORT_PRIMARY = (1 << 0),
165 ATA_PORT_SECONDARY = (1 << 1),
166 };
167
168 enum hsm_task_states {
169 HSM_ST_UNKNOWN,
170 HSM_ST_IDLE,
171 HSM_ST_POLL,
172 HSM_ST_TMOUT,
173 HSM_ST,
174 HSM_ST_LAST,
175 HSM_ST_LAST_POLL,
176 HSM_ST_ERR,
177 };
178
179 enum ata_completion_errors {
180 AC_ERR_OTHER = (1 << 0),
181 AC_ERR_DEV = (1 << 1),
182 AC_ERR_ATA_BUS = (1 << 2),
183 AC_ERR_HOST_BUS = (1 << 3),
184 };
185
186 /* forward declarations */
187 struct scsi_device;
188 struct ata_port_operations;
189 struct ata_port;
190 struct ata_queued_cmd;
191
192 /* typedefs */
193 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, unsigned int err_mask);
194
195 struct ata_ioports {
196 unsigned long cmd_addr;
197 unsigned long data_addr;
198 unsigned long error_addr;
199 unsigned long feature_addr;
200 unsigned long nsect_addr;
201 unsigned long lbal_addr;
202 unsigned long lbam_addr;
203 unsigned long lbah_addr;
204 unsigned long device_addr;
205 unsigned long status_addr;
206 unsigned long command_addr;
207 unsigned long altstatus_addr;
208 unsigned long ctl_addr;
209 unsigned long bmdma_addr;
210 unsigned long scr_addr;
211 };
212
213 struct ata_probe_ent {
214 struct list_head node;
215 struct device *dev;
216 const struct ata_port_operations *port_ops;
217 Scsi_Host_Template *sht;
218 struct ata_ioports port[ATA_MAX_PORTS];
219 unsigned int n_ports;
220 unsigned int hard_port_no;
221 unsigned int pio_mask;
222 unsigned int mwdma_mask;
223 unsigned int udma_mask;
224 unsigned int legacy_mode;
225 unsigned long irq;
226 unsigned int irq_flags;
227 unsigned long host_flags;
228 void __iomem *mmio_base;
229 void *private_data;
230 };
231
232 struct ata_host_set {
233 spinlock_t lock;
234 struct device *dev;
235 unsigned long irq;
236 void __iomem *mmio_base;
237 unsigned int n_ports;
238 void *private_data;
239 const struct ata_port_operations *ops;
240 struct ata_port * ports[0];
241 };
242
243 struct ata_queued_cmd {
244 struct ata_port *ap;
245 struct ata_device *dev;
246
247 struct scsi_cmnd *scsicmd;
248 void (*scsidone)(struct scsi_cmnd *);
249
250 struct ata_taskfile tf;
251 u8 cdb[ATAPI_CDB_LEN];
252
253 unsigned long flags; /* ATA_QCFLAG_xxx */
254 unsigned int tag;
255 unsigned int n_elem;
256 unsigned int orig_n_elem;
257
258 int dma_dir;
259
260 unsigned int pad_len;
261
262 unsigned int nsect;
263 unsigned int cursect;
264
265 unsigned int nbytes;
266 unsigned int curbytes;
267
268 unsigned int cursg;
269 unsigned int cursg_ofs;
270
271 struct scatterlist sgent;
272 struct scatterlist pad_sgent;
273 void *buf_virt;
274
275 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
276 struct scatterlist *__sg;
277
278 ata_qc_cb_t complete_fn;
279
280 struct completion *waiting;
281
282 void *private_data;
283 };
284
285 struct ata_host_stats {
286 unsigned long unhandled_irq;
287 unsigned long idle_irq;
288 unsigned long rw_reqbuf;
289 };
290
291 struct ata_device {
292 u64 n_sectors; /* size of device, if ATA */
293 unsigned long flags; /* ATA_DFLAG_xxx */
294 unsigned int class; /* ATA_DEV_xxx */
295 unsigned int devno; /* 0 or 1 */
296 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
297 u8 pio_mode;
298 u8 dma_mode;
299 u8 xfer_mode;
300 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
301
302 unsigned int multi_count; /* sectors count for
303 READ/WRITE MULTIPLE */
304
305 /* for CHS addressing */
306 u16 cylinders; /* Number of cylinders */
307 u16 heads; /* Number of heads */
308 u16 sectors; /* Number of sectors per track */
309 };
310
311 struct ata_port {
312 struct Scsi_Host *host; /* our co-allocated scsi host */
313 const struct ata_port_operations *ops;
314 unsigned long flags; /* ATA_FLAG_xxx */
315 unsigned int id; /* unique id req'd by scsi midlyr */
316 unsigned int port_no; /* unique port #; from zero */
317 unsigned int hard_port_no; /* hardware port #; from zero */
318
319 struct ata_prd *prd; /* our SG list */
320 dma_addr_t prd_dma; /* and its DMA mapping */
321
322 void *pad; /* array of DMA pad buffers */
323 dma_addr_t pad_dma;
324
325 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
326
327 u8 ctl; /* cache of ATA control register */
328 u8 last_ctl; /* Cache last written value */
329 unsigned int bus_state;
330 unsigned int port_state;
331 unsigned int pio_mask;
332 unsigned int mwdma_mask;
333 unsigned int udma_mask;
334 unsigned int cbl; /* cable type; ATA_CBL_xxx */
335 unsigned int cdb_len;
336
337 struct ata_device device[ATA_MAX_DEVICES];
338
339 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
340 unsigned long qactive;
341 unsigned int active_tag;
342
343 struct ata_host_stats stats;
344 struct ata_host_set *host_set;
345
346 struct work_struct packet_task;
347
348 struct work_struct pio_task;
349 unsigned int hsm_task_state;
350 unsigned long pio_task_timeout;
351
352 void *private_data;
353 };
354
355 struct ata_port_operations {
356 void (*port_disable) (struct ata_port *);
357
358 void (*dev_config) (struct ata_port *, struct ata_device *);
359
360 void (*set_piomode) (struct ata_port *, struct ata_device *);
361 void (*set_dmamode) (struct ata_port *, struct ata_device *);
362
363 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
364 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
365
366 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
367 u8 (*check_status)(struct ata_port *ap);
368 u8 (*check_altstatus)(struct ata_port *ap);
369 void (*dev_select)(struct ata_port *ap, unsigned int device);
370
371 void (*phy_reset) (struct ata_port *ap);
372 void (*post_set_mode) (struct ata_port *ap);
373
374 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
375
376 void (*bmdma_setup) (struct ata_queued_cmd *qc);
377 void (*bmdma_start) (struct ata_queued_cmd *qc);
378
379 void (*qc_prep) (struct ata_queued_cmd *qc);
380 int (*qc_issue) (struct ata_queued_cmd *qc);
381
382 void (*eng_timeout) (struct ata_port *ap);
383
384 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
385 void (*irq_clear) (struct ata_port *);
386
387 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
388 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
389 u32 val);
390
391 int (*port_start) (struct ata_port *ap);
392 void (*port_stop) (struct ata_port *ap);
393
394 void (*host_stop) (struct ata_host_set *host_set);
395
396 void (*bmdma_stop) (struct ata_queued_cmd *qc);
397 u8 (*bmdma_status) (struct ata_port *ap);
398 };
399
400 struct ata_port_info {
401 Scsi_Host_Template *sht;
402 unsigned long host_flags;
403 unsigned long pio_mask;
404 unsigned long mwdma_mask;
405 unsigned long udma_mask;
406 const struct ata_port_operations *port_ops;
407 };
408
409 struct ata_timing {
410 unsigned short mode; /* ATA mode */
411 unsigned short setup; /* t1 */
412 unsigned short act8b; /* t2 for 8-bit I/O */
413 unsigned short rec8b; /* t2i for 8-bit I/O */
414 unsigned short cyc8b; /* t0 for 8-bit I/O */
415 unsigned short active; /* t2 or tD */
416 unsigned short recover; /* t2i or tK */
417 unsigned short cycle; /* t0 */
418 unsigned short udma; /* t2CYCTYP/2 */
419 };
420
421 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
422
423 extern void ata_port_probe(struct ata_port *);
424 extern void __sata_phy_reset(struct ata_port *ap);
425 extern void sata_phy_reset(struct ata_port *ap);
426 extern void ata_bus_reset(struct ata_port *ap);
427 extern void ata_port_disable(struct ata_port *);
428 extern void ata_std_ports(struct ata_ioports *ioaddr);
429 #ifdef CONFIG_PCI
430 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
431 unsigned int n_ports);
432 extern void ata_pci_remove_one (struct pci_dev *pdev);
433 #endif /* CONFIG_PCI */
434 extern int ata_device_add(const struct ata_probe_ent *ent);
435 extern void ata_host_set_remove(struct ata_host_set *host_set);
436 extern int ata_scsi_detect(Scsi_Host_Template *sht);
437 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
438 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
439 extern int ata_scsi_error(struct Scsi_Host *host);
440 extern int ata_scsi_release(struct Scsi_Host *host);
441 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
442 extern int ata_ratelimit(void);
443
444 /*
445 * Default driver ops implementations
446 */
447 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
448 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
449 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
450 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
451 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
452 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
453 extern u8 ata_check_status(struct ata_port *ap);
454 extern u8 ata_altstatus(struct ata_port *ap);
455 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
456 extern int ata_port_start (struct ata_port *ap);
457 extern void ata_port_stop (struct ata_port *ap);
458 extern void ata_host_stop (struct ata_host_set *host_set);
459 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
460 extern void ata_qc_prep(struct ata_queued_cmd *qc);
461 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
462 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
463 unsigned int buflen);
464 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
465 unsigned int n_elem);
466 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
467 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
468 unsigned int ofs, unsigned int len);
469 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
470 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
471 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
472 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
473 extern u8 ata_bmdma_status(struct ata_port *ap);
474 extern void ata_bmdma_irq_clear(struct ata_port *ap);
475 extern void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask);
476 extern void ata_eng_timeout(struct ata_port *ap);
477 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
478 void (*done)(struct scsi_cmnd *));
479 extern int ata_std_bios_param(struct scsi_device *sdev,
480 struct block_device *bdev,
481 sector_t capacity, int geom[]);
482 extern int ata_scsi_slave_config(struct scsi_device *sdev);
483
484 /*
485 * Timing helpers
486 */
487 extern int ata_timing_compute(struct ata_device *, unsigned short,
488 struct ata_timing *, int, int);
489 extern void ata_timing_merge(const struct ata_timing *,
490 const struct ata_timing *, struct ata_timing *,
491 unsigned int);
492
493 enum {
494 ATA_TIMING_SETUP = (1 << 0),
495 ATA_TIMING_ACT8B = (1 << 1),
496 ATA_TIMING_REC8B = (1 << 2),
497 ATA_TIMING_CYC8B = (1 << 3),
498 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
499 ATA_TIMING_CYC8B,
500 ATA_TIMING_ACTIVE = (1 << 4),
501 ATA_TIMING_RECOVER = (1 << 5),
502 ATA_TIMING_CYCLE = (1 << 6),
503 ATA_TIMING_UDMA = (1 << 7),
504 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
505 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
506 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
507 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
508 };
509
510
511 #ifdef CONFIG_PCI
512 struct pci_bits {
513 unsigned int reg; /* PCI config register to read */
514 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
515 unsigned long mask;
516 unsigned long val;
517 };
518
519 extern void ata_pci_host_stop (struct ata_host_set *host_set);
520 extern struct ata_probe_ent *
521 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
522 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
523
524 #endif /* CONFIG_PCI */
525
526
527 static inline int
528 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
529 {
530 if (sg == &qc->pad_sgent)
531 return 1;
532 if (qc->pad_len)
533 return 0;
534 if (((sg - qc->__sg) + 1) == qc->n_elem)
535 return 1;
536 return 0;
537 }
538
539 static inline struct scatterlist *
540 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
541 {
542 if (sg == &qc->pad_sgent)
543 return NULL;
544 if (++sg - qc->__sg < qc->n_elem)
545 return sg;
546 return qc->pad_len ? &qc->pad_sgent : NULL;
547 }
548
549 #define ata_for_each_sg(sg, qc) \
550 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
551
552 static inline unsigned int ata_tag_valid(unsigned int tag)
553 {
554 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
555 }
556
557 static inline unsigned int ata_dev_present(const struct ata_device *dev)
558 {
559 return ((dev->class == ATA_DEV_ATA) ||
560 (dev->class == ATA_DEV_ATAPI));
561 }
562
563 static inline u8 ata_chk_status(struct ata_port *ap)
564 {
565 return ap->ops->check_status(ap);
566 }
567
568
569 /**
570 * ata_pause - Flush writes and pause 400 nanoseconds.
571 * @ap: Port to wait for.
572 *
573 * LOCKING:
574 * Inherited from caller.
575 */
576
577 static inline void ata_pause(struct ata_port *ap)
578 {
579 ata_altstatus(ap);
580 ndelay(400);
581 }
582
583
584 /**
585 * ata_busy_wait - Wait for a port status register
586 * @ap: Port to wait for.
587 *
588 * Waits up to max*10 microseconds for the selected bits in the port's
589 * status register to be cleared.
590 * Returns final value of status register.
591 *
592 * LOCKING:
593 * Inherited from caller.
594 */
595
596 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
597 unsigned int max)
598 {
599 u8 status;
600
601 do {
602 udelay(10);
603 status = ata_chk_status(ap);
604 max--;
605 } while ((status & bits) && (max > 0));
606
607 return status;
608 }
609
610
611 /**
612 * ata_wait_idle - Wait for a port to be idle.
613 * @ap: Port to wait for.
614 *
615 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
616 * Returns final value of status register.
617 *
618 * LOCKING:
619 * Inherited from caller.
620 */
621
622 static inline u8 ata_wait_idle(struct ata_port *ap)
623 {
624 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
625
626 if (status & (ATA_BUSY | ATA_DRQ)) {
627 unsigned long l = ap->ioaddr.status_addr;
628 printk(KERN_WARNING
629 "ATA: abnormal status 0x%X on port 0x%lX\n",
630 status, l);
631 }
632
633 return status;
634 }
635
636 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
637 {
638 qc->tf.ctl |= ATA_NIEN;
639 }
640
641 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
642 unsigned int tag)
643 {
644 if (likely(ata_tag_valid(tag)))
645 return &ap->qcmd[tag];
646 return NULL;
647 }
648
649 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
650 {
651 memset(tf, 0, sizeof(*tf));
652
653 tf->ctl = ap->ctl;
654 if (device == 0)
655 tf->device = ATA_DEVICE_OBS;
656 else
657 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
658 }
659
660
661 /**
662 * ata_irq_on - Enable interrupts on a port.
663 * @ap: Port on which interrupts are enabled.
664 *
665 * Enable interrupts on a legacy IDE device using MMIO or PIO,
666 * wait for idle, clear any pending interrupts.
667 *
668 * LOCKING:
669 * Inherited from caller.
670 */
671
672 static inline u8 ata_irq_on(struct ata_port *ap)
673 {
674 struct ata_ioports *ioaddr = &ap->ioaddr;
675 u8 tmp;
676
677 ap->ctl &= ~ATA_NIEN;
678 ap->last_ctl = ap->ctl;
679
680 if (ap->flags & ATA_FLAG_MMIO)
681 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
682 else
683 outb(ap->ctl, ioaddr->ctl_addr);
684 tmp = ata_wait_idle(ap);
685
686 ap->ops->irq_clear(ap);
687
688 return tmp;
689 }
690
691
692 /**
693 * ata_irq_ack - Acknowledge a device interrupt.
694 * @ap: Port on which interrupts are enabled.
695 *
696 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
697 * or BUSY+DRQ clear). Obtain dma status and port status from
698 * device. Clear the interrupt. Return port status.
699 *
700 * LOCKING:
701 */
702
703 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
704 {
705 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
706 u8 host_stat, post_stat, status;
707
708 status = ata_busy_wait(ap, bits, 1000);
709 if (status & bits)
710 DPRINTK("abnormal status 0x%X\n", status);
711
712 /* get controller status; clear intr, err bits */
713 if (ap->flags & ATA_FLAG_MMIO) {
714 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
715 host_stat = readb(mmio + ATA_DMA_STATUS);
716 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
717 mmio + ATA_DMA_STATUS);
718
719 post_stat = readb(mmio + ATA_DMA_STATUS);
720 } else {
721 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
722 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
723 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
724
725 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
726 }
727
728 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
729 host_stat, post_stat, status);
730
731 return status;
732 }
733
734 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
735 {
736 return ap->ops->scr_read(ap, reg);
737 }
738
739 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
740 {
741 ap->ops->scr_write(ap, reg, val);
742 }
743
744 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
745 u32 val)
746 {
747 ap->ops->scr_write(ap, reg, val);
748 (void) ap->ops->scr_read(ap, reg);
749 }
750
751 static inline unsigned int sata_dev_present(struct ata_port *ap)
752 {
753 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
754 }
755
756 static inline int ata_try_flush_cache(const struct ata_device *dev)
757 {
758 return ata_id_wcache_enabled(dev->id) ||
759 ata_id_has_flush(dev->id) ||
760 ata_id_has_flush_ext(dev->id);
761 }
762
763 static inline unsigned int ac_err_mask(u8 status)
764 {
765 if (status & ATA_BUSY)
766 return AC_ERR_ATA_BUS;
767 if (status & (ATA_ERR | ATA_DF))
768 return AC_ERR_DEV;
769 return 0;
770 }
771
772 static inline unsigned int __ac_err_mask(u8 status)
773 {
774 unsigned int mask = ac_err_mask(status);
775 if (mask == 0)
776 return AC_ERR_OTHER;
777 return mask;
778 }
779
780 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
781 {
782 ap->pad_dma = 0;
783 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
784 &ap->pad_dma, GFP_KERNEL);
785 return (ap->pad == NULL) ? -ENOMEM : 0;
786 }
787
788 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
789 {
790 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
791 }
792
793 #endif /* __LINUX_LIBATA_H__ */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree