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libata: bitmask based pci init functions for one or two ports
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / libata.h
blob4d45179872cccc591e18bbe40c469e67480bef8f
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 = 0,
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 /* Masks for port functions */
160 ATA_PORT_PRIMARY = (1 << 0),
161 ATA_PORT_SECONDARY = (1 << 1),
162 };
163
164 enum hsm_task_states {
165 HSM_ST_UNKNOWN,
166 HSM_ST_IDLE,
167 HSM_ST_POLL,
168 HSM_ST_TMOUT,
169 HSM_ST,
170 HSM_ST_LAST,
171 HSM_ST_LAST_POLL,
172 HSM_ST_ERR,
173 };
174
175 /* forward declarations */
176 struct scsi_device;
177 struct ata_port_operations;
178 struct ata_port;
179 struct ata_queued_cmd;
180
181 /* typedefs */
182 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat);
183
184 struct ata_ioports {
185 unsigned long cmd_addr;
186 unsigned long data_addr;
187 unsigned long error_addr;
188 unsigned long feature_addr;
189 unsigned long nsect_addr;
190 unsigned long lbal_addr;
191 unsigned long lbam_addr;
192 unsigned long lbah_addr;
193 unsigned long device_addr;
194 unsigned long status_addr;
195 unsigned long command_addr;
196 unsigned long altstatus_addr;
197 unsigned long ctl_addr;
198 unsigned long bmdma_addr;
199 unsigned long scr_addr;
200 };
201
202 struct ata_probe_ent {
203 struct list_head node;
204 struct device *dev;
205 struct ata_port_operations *port_ops;
206 Scsi_Host_Template *sht;
207 struct ata_ioports port[ATA_MAX_PORTS];
208 unsigned int n_ports;
209 unsigned int hard_port_no;
210 unsigned int pio_mask;
211 unsigned int mwdma_mask;
212 unsigned int udma_mask;
213 unsigned int legacy_mode;
214 unsigned long irq;
215 unsigned int irq_flags;
216 unsigned long host_flags;
217 void __iomem *mmio_base;
218 void *private_data;
219 };
220
221 struct ata_host_set {
222 spinlock_t lock;
223 struct device *dev;
224 unsigned long irq;
225 void __iomem *mmio_base;
226 unsigned int n_ports;
227 void *private_data;
228 struct ata_port_operations *ops;
229 struct ata_port * ports[0];
230 };
231
232 struct ata_queued_cmd {
233 struct ata_port *ap;
234 struct ata_device *dev;
235
236 struct scsi_cmnd *scsicmd;
237 void (*scsidone)(struct scsi_cmnd *);
238
239 struct ata_taskfile tf;
240 u8 cdb[ATAPI_CDB_LEN];
241
242 unsigned long flags; /* ATA_QCFLAG_xxx */
243 unsigned int tag;
244 unsigned int n_elem;
245
246 int dma_dir;
247
248 unsigned int nsect;
249 unsigned int cursect;
250
251 unsigned int nbytes;
252 unsigned int curbytes;
253
254 unsigned int cursg;
255 unsigned int cursg_ofs;
256
257 struct scatterlist sgent;
258 void *buf_virt;
259
260 struct scatterlist *sg;
261
262 ata_qc_cb_t complete_fn;
263
264 struct completion *waiting;
265
266 void *private_data;
267 };
268
269 struct ata_host_stats {
270 unsigned long unhandled_irq;
271 unsigned long idle_irq;
272 unsigned long rw_reqbuf;
273 };
274
275 struct ata_device {
276 u64 n_sectors; /* size of device, if ATA */
277 unsigned long flags; /* ATA_DFLAG_xxx */
278 unsigned int class; /* ATA_DEV_xxx */
279 unsigned int devno; /* 0 or 1 */
280 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
281 u8 pio_mode;
282 u8 dma_mode;
283 u8 xfer_mode;
284 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
285
286 /* cache info about current transfer mode */
287 u8 xfer_protocol; /* taskfile xfer protocol */
288 u8 read_cmd; /* opcode to use on read */
289 u8 write_cmd; /* opcode to use on write */
290
291 /* for CHS addressing */
292 u16 cylinders; /* Number of cylinders */
293 u16 heads; /* Number of heads */
294 u16 sectors; /* Number of sectors per track */
295 };
296
297 struct ata_port {
298 struct Scsi_Host *host; /* our co-allocated scsi host */
299 struct ata_port_operations *ops;
300 unsigned long flags; /* ATA_FLAG_xxx */
301 unsigned int id; /* unique id req'd by scsi midlyr */
302 unsigned int port_no; /* unique port #; from zero */
303 unsigned int hard_port_no; /* hardware port #; from zero */
304
305 struct ata_prd *prd; /* our SG list */
306 dma_addr_t prd_dma; /* and its DMA mapping */
307
308 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
309
310 u8 ctl; /* cache of ATA control register */
311 u8 last_ctl; /* Cache last written value */
312 unsigned int bus_state;
313 unsigned int port_state;
314 unsigned int pio_mask;
315 unsigned int mwdma_mask;
316 unsigned int udma_mask;
317 unsigned int cbl; /* cable type; ATA_CBL_xxx */
318 unsigned int cdb_len;
319
320 struct ata_device device[ATA_MAX_DEVICES];
321
322 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
323 unsigned long qactive;
324 unsigned int active_tag;
325
326 struct ata_host_stats stats;
327 struct ata_host_set *host_set;
328
329 struct work_struct packet_task;
330
331 struct work_struct pio_task;
332 unsigned int hsm_task_state;
333 unsigned long pio_task_timeout;
334
335 void *private_data;
336 };
337
338 struct ata_port_operations {
339 void (*port_disable) (struct ata_port *);
340
341 void (*dev_config) (struct ata_port *, struct ata_device *);
342
343 void (*set_piomode) (struct ata_port *, struct ata_device *);
344 void (*set_dmamode) (struct ata_port *, struct ata_device *);
345
346 void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
347 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
348
349 void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
350 u8 (*check_status)(struct ata_port *ap);
351 u8 (*check_altstatus)(struct ata_port *ap);
352 u8 (*check_err)(struct ata_port *ap);
353 void (*dev_select)(struct ata_port *ap, unsigned int device);
354
355 void (*phy_reset) (struct ata_port *ap);
356 void (*post_set_mode) (struct ata_port *ap);
357
358 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
359
360 void (*bmdma_setup) (struct ata_queued_cmd *qc);
361 void (*bmdma_start) (struct ata_queued_cmd *qc);
362
363 void (*qc_prep) (struct ata_queued_cmd *qc);
364 int (*qc_issue) (struct ata_queued_cmd *qc);
365
366 void (*eng_timeout) (struct ata_port *ap);
367
368 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
369 void (*irq_clear) (struct ata_port *);
370
371 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
372 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
373 u32 val);
374
375 int (*port_start) (struct ata_port *ap);
376 void (*port_stop) (struct ata_port *ap);
377
378 void (*host_stop) (struct ata_host_set *host_set);
379
380 void (*bmdma_stop) (struct ata_queued_cmd *qc);
381 u8 (*bmdma_status) (struct ata_port *ap);
382 };
383
384 struct ata_port_info {
385 Scsi_Host_Template *sht;
386 unsigned long host_flags;
387 unsigned long pio_mask;
388 unsigned long mwdma_mask;
389 unsigned long udma_mask;
390 struct ata_port_operations *port_ops;
391 };
392
393
394 extern void ata_port_probe(struct ata_port *);
395 extern void __sata_phy_reset(struct ata_port *ap);
396 extern void sata_phy_reset(struct ata_port *ap);
397 extern void ata_bus_reset(struct ata_port *ap);
398 extern void ata_port_disable(struct ata_port *);
399 extern void ata_std_ports(struct ata_ioports *ioaddr);
400 #ifdef CONFIG_PCI
401 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
402 unsigned int n_ports);
403 extern void ata_pci_remove_one (struct pci_dev *pdev);
404 #endif /* CONFIG_PCI */
405 extern int ata_device_add(struct ata_probe_ent *ent);
406 extern void ata_host_set_remove(struct ata_host_set *host_set);
407 extern int ata_scsi_detect(Scsi_Host_Template *sht);
408 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
409 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
410 extern int ata_scsi_error(struct Scsi_Host *host);
411 extern int ata_scsi_release(struct Scsi_Host *host);
412 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
413 /*
414 * Default driver ops implementations
415 */
416 extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf);
417 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
418 extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp);
419 extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf);
420 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
421 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
422 extern u8 ata_check_status(struct ata_port *ap);
423 extern u8 ata_altstatus(struct ata_port *ap);
424 extern u8 ata_chk_err(struct ata_port *ap);
425 extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
426 extern int ata_port_start (struct ata_port *ap);
427 extern void ata_port_stop (struct ata_port *ap);
428 extern void ata_host_stop (struct ata_host_set *host_set);
429 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
430 extern void ata_qc_prep(struct ata_queued_cmd *qc);
431 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
432 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
433 unsigned int buflen);
434 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
435 unsigned int n_elem);
436 extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
437 extern void ata_dev_id_string(u16 *id, unsigned char *s,
438 unsigned int ofs, unsigned int len);
439 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
440 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
441 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
442 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
443 extern u8 ata_bmdma_status(struct ata_port *ap);
444 extern void ata_bmdma_irq_clear(struct ata_port *ap);
445 extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
446 extern void ata_eng_timeout(struct ata_port *ap);
447 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
448 void (*done)(struct scsi_cmnd *));
449 extern int ata_std_bios_param(struct scsi_device *sdev,
450 struct block_device *bdev,
451 sector_t capacity, int geom[]);
452 extern int ata_scsi_slave_config(struct scsi_device *sdev);
453
454
455 #ifdef CONFIG_PCI
456 struct pci_bits {
457 unsigned int reg; /* PCI config register to read */
458 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
459 unsigned long mask;
460 unsigned long val;
461 };
462
463 extern void ata_pci_host_stop (struct ata_host_set *host_set);
464 extern struct ata_probe_ent *
465 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
466 extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
467
468 #endif /* CONFIG_PCI */
469
470
471 static inline unsigned int ata_tag_valid(unsigned int tag)
472 {
473 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
474 }
475
476 static inline unsigned int ata_dev_present(struct ata_device *dev)
477 {
478 return ((dev->class == ATA_DEV_ATA) ||
479 (dev->class == ATA_DEV_ATAPI));
480 }
481
482 static inline u8 ata_chk_status(struct ata_port *ap)
483 {
484 return ap->ops->check_status(ap);
485 }
486
487
488 /**
489 * ata_pause - Flush writes and pause 400 nanoseconds.
490 * @ap: Port to wait for.
491 *
492 * LOCKING:
493 * Inherited from caller.
494 */
495
496 static inline void ata_pause(struct ata_port *ap)
497 {
498 ata_altstatus(ap);
499 ndelay(400);
500 }
501
502
503 /**
504 * ata_busy_wait - Wait for a port status register
505 * @ap: Port to wait for.
506 *
507 * Waits up to max*10 microseconds for the selected bits in the port's
508 * status register to be cleared.
509 * Returns final value of status register.
510 *
511 * LOCKING:
512 * Inherited from caller.
513 */
514
515 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
516 unsigned int max)
517 {
518 u8 status;
519
520 do {
521 udelay(10);
522 status = ata_chk_status(ap);
523 max--;
524 } while ((status & bits) && (max > 0));
525
526 return status;
527 }
528
529
530 /**
531 * ata_wait_idle - Wait for a port to be idle.
532 * @ap: Port to wait for.
533 *
534 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
535 * Returns final value of status register.
536 *
537 * LOCKING:
538 * Inherited from caller.
539 */
540
541 static inline u8 ata_wait_idle(struct ata_port *ap)
542 {
543 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
544
545 if (status & (ATA_BUSY | ATA_DRQ)) {
546 unsigned long l = ap->ioaddr.status_addr;
547 printk(KERN_WARNING
548 "ATA: abnormal status 0x%X on port 0x%lX\n",
549 status, l);
550 }
551
552 return status;
553 }
554
555 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
556 {
557 qc->tf.ctl |= ATA_NIEN;
558 }
559
560 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
561 unsigned int tag)
562 {
563 if (likely(ata_tag_valid(tag)))
564 return &ap->qcmd[tag];
565 return NULL;
566 }
567
568 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
569 {
570 memset(tf, 0, sizeof(*tf));
571
572 tf->ctl = ap->ctl;
573 if (device == 0)
574 tf->device = ATA_DEVICE_OBS;
575 else
576 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
577 }
578
579
580 /**
581 * ata_irq_on - Enable interrupts on a port.
582 * @ap: Port on which interrupts are enabled.
583 *
584 * Enable interrupts on a legacy IDE device using MMIO or PIO,
585 * wait for idle, clear any pending interrupts.
586 *
587 * LOCKING:
588 * Inherited from caller.
589 */
590
591 static inline u8 ata_irq_on(struct ata_port *ap)
592 {
593 struct ata_ioports *ioaddr = &ap->ioaddr;
594 u8 tmp;
595
596 ap->ctl &= ~ATA_NIEN;
597 ap->last_ctl = ap->ctl;
598
599 if (ap->flags & ATA_FLAG_MMIO)
600 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
601 else
602 outb(ap->ctl, ioaddr->ctl_addr);
603 tmp = ata_wait_idle(ap);
604
605 ap->ops->irq_clear(ap);
606
607 return tmp;
608 }
609
610
611 /**
612 * ata_irq_ack - Acknowledge a device interrupt.
613 * @ap: Port on which interrupts are enabled.
614 *
615 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
616 * or BUSY+DRQ clear). Obtain dma status and port status from
617 * device. Clear the interrupt. Return port status.
618 *
619 * LOCKING:
620 */
621
622 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
623 {
624 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
625 u8 host_stat, post_stat, status;
626
627 status = ata_busy_wait(ap, bits, 1000);
628 if (status & bits)
629 DPRINTK("abnormal status 0x%X\n", status);
630
631 /* get controller status; clear intr, err bits */
632 if (ap->flags & ATA_FLAG_MMIO) {
633 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
634 host_stat = readb(mmio + ATA_DMA_STATUS);
635 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
636 mmio + ATA_DMA_STATUS);
637
638 post_stat = readb(mmio + ATA_DMA_STATUS);
639 } else {
640 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
641 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
642 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
643
644 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
645 }
646
647 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
648 host_stat, post_stat, status);
649
650 return status;
651 }
652
653 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
654 {
655 return ap->ops->scr_read(ap, reg);
656 }
657
658 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
659 {
660 ap->ops->scr_write(ap, reg, val);
661 }
662
663 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
664 u32 val)
665 {
666 ap->ops->scr_write(ap, reg, val);
667 (void) ap->ops->scr_read(ap, reg);
668 }
669
670 static inline unsigned int sata_dev_present(struct ata_port *ap)
671 {
672 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
673 }
674
675 static inline int ata_try_flush_cache(struct ata_device *dev)
676 {
677 return ata_id_wcache_enabled(dev->id) ||
678 ata_id_has_flush(dev->id) ||
679 ata_id_has_flush_ext(dev->id);
680 }
681
682 #endif /* __LINUX_LIBATA_H__ */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree