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1da177e4 LT |
1 | /* |
2 | Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
3 | Copyright 2003-2004 Jeff Garzik | |
4 | ||
5 | The contents of this file are subject to the Open | |
6 | Software License version 1.1 that can be found at | |
7 | http://www.opensource.org/licenses/osl-1.1.txt and is included herein | |
8 | by reference. | |
9 | ||
10 | Alternatively, the contents of this file may be used under the terms | |
11 | of the GNU General Public License version 2 (the "GPL") as distributed | |
12 | in the kernel source COPYING file, in which case the provisions of | |
13 | the GPL are applicable instead of the above. If you wish to allow | |
14 | the use of your version of this file only under the terms of the | |
15 | GPL and not to allow others to use your version of this file under | |
16 | the OSL, indicate your decision by deleting the provisions above and | |
17 | replace them with the notice and other provisions required by the GPL. | |
18 | If you do not delete the provisions above, a recipient may use your | |
19 | version of this file under either the OSL or the GPL. | |
20 | ||
21 | */ | |
22 | ||
23 | #ifndef __LINUX_LIBATA_H__ | |
24 | #define __LINUX_LIBATA_H__ | |
25 | ||
26 | #include <linux/delay.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/pci.h> | |
29 | #include <asm/io.h> | |
30 | #include <linux/ata.h> | |
31 | #include <linux/workqueue.h> | |
32 | ||
33 | /* | |
34 | * compile-time options | |
35 | */ | |
36 | #undef ATA_DEBUG /* debugging output */ | |
37 | #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ | |
38 | #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ | |
39 | #undef ATA_NDEBUG /* define to disable quick runtime checks */ | |
40 | #undef ATA_ENABLE_ATAPI /* define to enable ATAPI support */ | |
41 | #undef ATA_ENABLE_PATA /* define to enable PATA support in some | |
42 | * low-level drivers */ | |
43 | #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */ | |
44 | ||
45 | ||
46 | /* note: prints function name for you */ | |
47 | #ifdef ATA_DEBUG | |
48 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
49 | #ifdef ATA_VERBOSE_DEBUG | |
50 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
51 | #else | |
52 | #define VPRINTK(fmt, args...) | |
53 | #endif /* ATA_VERBOSE_DEBUG */ | |
54 | #else | |
55 | #define DPRINTK(fmt, args...) | |
56 | #define VPRINTK(fmt, args...) | |
57 | #endif /* ATA_DEBUG */ | |
58 | ||
59 | #ifdef ATA_NDEBUG | |
60 | #define assert(expr) | |
61 | #else | |
62 | #define assert(expr) \ | |
63 | if(unlikely(!(expr))) { \ | |
64 | printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ | |
65 | #expr,__FILE__,__FUNCTION__,__LINE__); \ | |
66 | } | |
67 | #endif | |
68 | ||
69 | /* defines only for the constants which don't work well as enums */ | |
70 | #define ATA_TAG_POISON 0xfafbfcfdU | |
71 | ||
72 | /* move to PCI layer? */ | |
73 | static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) | |
74 | { | |
75 | return &pdev->dev; | |
76 | } | |
77 | ||
78 | enum { | |
79 | /* various global constants */ | |
80 | LIBATA_MAX_PRD = ATA_MAX_PRD / 2, | |
81 | ATA_MAX_PORTS = 8, | |
82 | ATA_DEF_QUEUE = 1, | |
83 | ATA_MAX_QUEUE = 1, | |
84 | ATA_MAX_SECTORS = 200, /* FIXME */ | |
85 | ATA_MAX_BUS = 2, | |
86 | ATA_DEF_BUSY_WAIT = 10000, | |
87 | ATA_SHORT_PAUSE = (HZ >> 6) + 1, | |
88 | ||
89 | ATA_SHT_EMULATED = 1, | |
90 | ATA_SHT_CMD_PER_LUN = 1, | |
91 | ATA_SHT_THIS_ID = -1, | |
92 | ATA_SHT_USE_CLUSTERING = 0, | |
93 | ||
94 | /* struct ata_device stuff */ | |
95 | ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ | |
96 | ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ | |
97 | ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */ | |
98 | ||
99 | ATA_DEV_UNKNOWN = 0, /* unknown device */ | |
100 | ATA_DEV_ATA = 1, /* ATA device */ | |
101 | ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ | |
102 | ATA_DEV_ATAPI = 3, /* ATAPI device */ | |
103 | ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ | |
104 | ATA_DEV_NONE = 5, /* no device */ | |
105 | ||
106 | /* struct ata_port flags */ | |
107 | ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ | |
108 | /* (doesn't imply presence) */ | |
109 | ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ | |
110 | ATA_FLAG_SATA = (1 << 3), | |
111 | ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ | |
112 | ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */ | |
113 | ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ | |
114 | ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */ | |
115 | ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ | |
c1389503 TH |
116 | ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once |
117 | * proper HSM is in place. */ | |
1da177e4 LT |
118 | |
119 | ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ | |
120 | ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ | |
121 | ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ | |
122 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, | |
123 | ||
124 | /* various lengths of time */ | |
125 | ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ | |
126 | ATA_TMOUT_PIO = 30 * HZ, | |
127 | ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ | |
128 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ | |
129 | ATA_TMOUT_CDB = 30 * HZ, | |
130 | ATA_TMOUT_CDB_QUICK = 5 * HZ, | |
131 | ||
132 | /* ATA bus states */ | |
133 | BUS_UNKNOWN = 0, | |
134 | BUS_DMA = 1, | |
135 | BUS_IDLE = 2, | |
136 | BUS_NOINTR = 3, | |
137 | BUS_NODATA = 4, | |
138 | BUS_TIMER = 5, | |
139 | BUS_PIO = 6, | |
140 | BUS_EDD = 7, | |
141 | BUS_IDENTIFY = 8, | |
142 | BUS_PACKET = 9, | |
143 | ||
144 | /* SATA port states */ | |
145 | PORT_UNKNOWN = 0, | |
146 | PORT_ENABLED = 1, | |
147 | PORT_DISABLED = 2, | |
148 | ||
149 | /* encoding various smaller bitmaps into a single | |
150 | * unsigned long bitmap | |
151 | */ | |
152 | ATA_SHIFT_UDMA = 0, | |
153 | ATA_SHIFT_MWDMA = 8, | |
154 | ATA_SHIFT_PIO = 11, | |
155 | }; | |
156 | ||
157 | enum pio_task_states { | |
158 | PIO_ST_UNKNOWN, | |
159 | PIO_ST_IDLE, | |
160 | PIO_ST_POLL, | |
161 | PIO_ST_TMOUT, | |
162 | PIO_ST, | |
163 | PIO_ST_LAST, | |
164 | PIO_ST_LAST_POLL, | |
165 | PIO_ST_ERR, | |
166 | }; | |
167 | ||
168 | /* forward declarations */ | |
169 | struct scsi_device; | |
170 | struct ata_port_operations; | |
171 | struct ata_port; | |
172 | struct ata_queued_cmd; | |
173 | ||
174 | /* typedefs */ | |
175 | typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat); | |
176 | ||
177 | struct ata_ioports { | |
178 | unsigned long cmd_addr; | |
179 | unsigned long data_addr; | |
180 | unsigned long error_addr; | |
181 | unsigned long feature_addr; | |
182 | unsigned long nsect_addr; | |
183 | unsigned long lbal_addr; | |
184 | unsigned long lbam_addr; | |
185 | unsigned long lbah_addr; | |
186 | unsigned long device_addr; | |
187 | unsigned long status_addr; | |
188 | unsigned long command_addr; | |
189 | unsigned long altstatus_addr; | |
190 | unsigned long ctl_addr; | |
191 | unsigned long bmdma_addr; | |
192 | unsigned long scr_addr; | |
193 | }; | |
194 | ||
195 | struct ata_probe_ent { | |
196 | struct list_head node; | |
197 | struct device *dev; | |
198 | struct ata_port_operations *port_ops; | |
199 | Scsi_Host_Template *sht; | |
200 | struct ata_ioports port[ATA_MAX_PORTS]; | |
201 | unsigned int n_ports; | |
202 | unsigned int hard_port_no; | |
203 | unsigned int pio_mask; | |
204 | unsigned int mwdma_mask; | |
205 | unsigned int udma_mask; | |
206 | unsigned int legacy_mode; | |
207 | unsigned long irq; | |
208 | unsigned int irq_flags; | |
209 | unsigned long host_flags; | |
210 | void __iomem *mmio_base; | |
211 | void *private_data; | |
212 | }; | |
213 | ||
214 | struct ata_host_set { | |
215 | spinlock_t lock; | |
216 | struct device *dev; | |
217 | unsigned long irq; | |
218 | void __iomem *mmio_base; | |
219 | unsigned int n_ports; | |
220 | void *private_data; | |
221 | struct ata_port_operations *ops; | |
222 | struct ata_port * ports[0]; | |
223 | }; | |
224 | ||
225 | struct ata_queued_cmd { | |
226 | struct ata_port *ap; | |
227 | struct ata_device *dev; | |
228 | ||
229 | struct scsi_cmnd *scsicmd; | |
230 | void (*scsidone)(struct scsi_cmnd *); | |
231 | ||
232 | struct ata_taskfile tf; | |
233 | u8 cdb[ATAPI_CDB_LEN]; | |
234 | ||
235 | unsigned long flags; /* ATA_QCFLAG_xxx */ | |
236 | unsigned int tag; | |
237 | unsigned int n_elem; | |
238 | ||
239 | int dma_dir; | |
240 | ||
241 | unsigned int nsect; | |
242 | unsigned int cursect; | |
243 | ||
244 | unsigned int nbytes; | |
245 | unsigned int curbytes; | |
246 | ||
247 | unsigned int cursg; | |
248 | unsigned int cursg_ofs; | |
249 | ||
250 | struct scatterlist sgent; | |
251 | void *buf_virt; | |
252 | ||
253 | struct scatterlist *sg; | |
254 | ||
255 | ata_qc_cb_t complete_fn; | |
256 | ||
257 | struct completion *waiting; | |
258 | ||
259 | void *private_data; | |
260 | }; | |
261 | ||
262 | struct ata_host_stats { | |
263 | unsigned long unhandled_irq; | |
264 | unsigned long idle_irq; | |
265 | unsigned long rw_reqbuf; | |
266 | }; | |
267 | ||
268 | struct ata_device { | |
269 | u64 n_sectors; /* size of device, if ATA */ | |
270 | unsigned long flags; /* ATA_DFLAG_xxx */ | |
271 | unsigned int class; /* ATA_DEV_xxx */ | |
272 | unsigned int devno; /* 0 or 1 */ | |
273 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ | |
274 | u8 pio_mode; | |
275 | u8 dma_mode; | |
276 | u8 xfer_mode; | |
277 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ | |
278 | ||
279 | /* cache info about current transfer mode */ | |
280 | u8 xfer_protocol; /* taskfile xfer protocol */ | |
281 | u8 read_cmd; /* opcode to use on read */ | |
282 | u8 write_cmd; /* opcode to use on write */ | |
283 | }; | |
284 | ||
285 | struct ata_port { | |
286 | struct Scsi_Host *host; /* our co-allocated scsi host */ | |
287 | struct ata_port_operations *ops; | |
288 | unsigned long flags; /* ATA_FLAG_xxx */ | |
289 | unsigned int id; /* unique id req'd by scsi midlyr */ | |
290 | unsigned int port_no; /* unique port #; from zero */ | |
291 | unsigned int hard_port_no; /* hardware port #; from zero */ | |
292 | ||
293 | struct ata_prd *prd; /* our SG list */ | |
294 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
295 | ||
296 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ | |
297 | ||
298 | u8 ctl; /* cache of ATA control register */ | |
299 | u8 last_ctl; /* Cache last written value */ | |
300 | unsigned int bus_state; | |
301 | unsigned int port_state; | |
302 | unsigned int pio_mask; | |
303 | unsigned int mwdma_mask; | |
304 | unsigned int udma_mask; | |
305 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
306 | unsigned int cdb_len; | |
307 | ||
308 | struct ata_device device[ATA_MAX_DEVICES]; | |
309 | ||
310 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
311 | unsigned long qactive; | |
312 | unsigned int active_tag; | |
313 | ||
314 | struct ata_host_stats stats; | |
315 | struct ata_host_set *host_set; | |
316 | ||
317 | struct work_struct packet_task; | |
318 | ||
319 | struct work_struct pio_task; | |
320 | unsigned int pio_task_state; | |
321 | unsigned long pio_task_timeout; | |
322 | ||
323 | void *private_data; | |
324 | }; | |
325 | ||
326 | struct ata_port_operations { | |
327 | void (*port_disable) (struct ata_port *); | |
328 | ||
329 | void (*dev_config) (struct ata_port *, struct ata_device *); | |
330 | ||
331 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
332 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
333 | ||
334 | void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); | |
335 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); | |
336 | ||
337 | void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); | |
338 | u8 (*check_status)(struct ata_port *ap); | |
339 | u8 (*check_altstatus)(struct ata_port *ap); | |
340 | u8 (*check_err)(struct ata_port *ap); | |
341 | void (*dev_select)(struct ata_port *ap, unsigned int device); | |
342 | ||
343 | void (*phy_reset) (struct ata_port *ap); | |
344 | void (*post_set_mode) (struct ata_port *ap); | |
345 | ||
346 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); | |
347 | ||
348 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
349 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
350 | ||
351 | void (*qc_prep) (struct ata_queued_cmd *qc); | |
352 | int (*qc_issue) (struct ata_queued_cmd *qc); | |
353 | ||
354 | void (*eng_timeout) (struct ata_port *ap); | |
355 | ||
356 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); | |
357 | void (*irq_clear) (struct ata_port *); | |
358 | ||
359 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); | |
360 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, | |
361 | u32 val); | |
362 | ||
363 | int (*port_start) (struct ata_port *ap); | |
364 | void (*port_stop) (struct ata_port *ap); | |
365 | ||
366 | void (*host_stop) (struct ata_host_set *host_set); | |
367 | ||
368 | void (*bmdma_stop) (struct ata_port *ap); | |
369 | u8 (*bmdma_status) (struct ata_port *ap); | |
370 | }; | |
371 | ||
372 | struct ata_port_info { | |
373 | Scsi_Host_Template *sht; | |
374 | unsigned long host_flags; | |
375 | unsigned long pio_mask; | |
376 | unsigned long mwdma_mask; | |
377 | unsigned long udma_mask; | |
378 | struct ata_port_operations *port_ops; | |
379 | }; | |
380 | ||
381 | ||
382 | extern void ata_port_probe(struct ata_port *); | |
383 | extern void __sata_phy_reset(struct ata_port *ap); | |
384 | extern void sata_phy_reset(struct ata_port *ap); | |
385 | extern void ata_bus_reset(struct ata_port *ap); | |
386 | extern void ata_port_disable(struct ata_port *); | |
387 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
388 | #ifdef CONFIG_PCI | |
389 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, | |
390 | unsigned int n_ports); | |
391 | extern void ata_pci_remove_one (struct pci_dev *pdev); | |
392 | #endif /* CONFIG_PCI */ | |
393 | extern int ata_device_add(struct ata_probe_ent *ent); | |
394 | extern int ata_scsi_detect(Scsi_Host_Template *sht); | |
395 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); | |
396 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
397 | extern int ata_scsi_error(struct Scsi_Host *host); | |
398 | extern int ata_scsi_release(struct Scsi_Host *host); | |
399 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); | |
400 | /* | |
401 | * Default driver ops implementations | |
402 | */ | |
403 | extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); | |
404 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); | |
405 | extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); | |
406 | extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); | |
407 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); | |
408 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
409 | extern u8 ata_check_status(struct ata_port *ap); | |
410 | extern u8 ata_altstatus(struct ata_port *ap); | |
411 | extern u8 ata_chk_err(struct ata_port *ap); | |
412 | extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); | |
413 | extern int ata_port_start (struct ata_port *ap); | |
414 | extern void ata_port_stop (struct ata_port *ap); | |
aa8f0dc6 | 415 | extern void ata_host_stop (struct ata_host_set *host_set); |
1da177e4 LT |
416 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
417 | extern void ata_qc_prep(struct ata_queued_cmd *qc); | |
418 | extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); | |
419 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, | |
420 | unsigned int buflen); | |
421 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
422 | unsigned int n_elem); | |
423 | extern unsigned int ata_dev_classify(struct ata_taskfile *tf); | |
424 | extern void ata_dev_id_string(u16 *id, unsigned char *s, | |
425 | unsigned int ofs, unsigned int len); | |
6f2f3812 | 426 | extern void ata_dev_config(struct ata_port *ap, unsigned int i); |
1da177e4 LT |
427 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
428 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
429 | extern void ata_bmdma_stop(struct ata_port *ap); | |
430 | extern u8 ata_bmdma_status(struct ata_port *ap); | |
431 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
432 | extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); | |
433 | extern void ata_eng_timeout(struct ata_port *ap); | |
434 | extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, | |
435 | void (*done)(struct scsi_cmnd *)); | |
436 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
437 | struct block_device *bdev, | |
438 | sector_t capacity, int geom[]); | |
439 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
440 | ||
441 | ||
442 | #ifdef CONFIG_PCI | |
443 | struct pci_bits { | |
444 | unsigned int reg; /* PCI config register to read */ | |
445 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
446 | unsigned long mask; | |
447 | unsigned long val; | |
448 | }; | |
449 | ||
450 | extern struct ata_probe_ent * | |
451 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); | |
452 | extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); | |
453 | ||
454 | #endif /* CONFIG_PCI */ | |
455 | ||
456 | ||
457 | static inline unsigned int ata_tag_valid(unsigned int tag) | |
458 | { | |
459 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
460 | } | |
461 | ||
462 | static inline unsigned int ata_dev_present(struct ata_device *dev) | |
463 | { | |
464 | return ((dev->class == ATA_DEV_ATA) || | |
465 | (dev->class == ATA_DEV_ATAPI)); | |
466 | } | |
467 | ||
468 | static inline u8 ata_chk_status(struct ata_port *ap) | |
469 | { | |
470 | return ap->ops->check_status(ap); | |
471 | } | |
472 | ||
0baab86b EF |
473 | |
474 | /** | |
475 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
476 | * @ap: Port to wait for. | |
477 | * | |
478 | * LOCKING: | |
479 | * Inherited from caller. | |
480 | */ | |
481 | ||
1da177e4 LT |
482 | static inline void ata_pause(struct ata_port *ap) |
483 | { | |
484 | ata_altstatus(ap); | |
485 | ndelay(400); | |
486 | } | |
487 | ||
0baab86b EF |
488 | |
489 | /** | |
490 | * ata_busy_wait - Wait for a port status register | |
491 | * @ap: Port to wait for. | |
492 | * | |
493 | * Waits up to max*10 microseconds for the selected bits in the port's | |
494 | * status register to be cleared. | |
495 | * Returns final value of status register. | |
496 | * | |
497 | * LOCKING: | |
498 | * Inherited from caller. | |
499 | */ | |
500 | ||
1da177e4 LT |
501 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
502 | unsigned int max) | |
503 | { | |
504 | u8 status; | |
505 | ||
506 | do { | |
507 | udelay(10); | |
508 | status = ata_chk_status(ap); | |
509 | max--; | |
510 | } while ((status & bits) && (max > 0)); | |
511 | ||
512 | return status; | |
513 | } | |
514 | ||
0baab86b EF |
515 | |
516 | /** | |
517 | * ata_wait_idle - Wait for a port to be idle. | |
518 | * @ap: Port to wait for. | |
519 | * | |
520 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
521 | * Returns final value of status register. | |
522 | * | |
523 | * LOCKING: | |
524 | * Inherited from caller. | |
525 | */ | |
526 | ||
1da177e4 LT |
527 | static inline u8 ata_wait_idle(struct ata_port *ap) |
528 | { | |
529 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
530 | ||
531 | if (status & (ATA_BUSY | ATA_DRQ)) { | |
532 | unsigned long l = ap->ioaddr.status_addr; | |
533 | printk(KERN_WARNING | |
534 | "ATA: abnormal status 0x%X on port 0x%lX\n", | |
535 | status, l); | |
536 | } | |
537 | ||
538 | return status; | |
539 | } | |
540 | ||
541 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
542 | { | |
543 | qc->tf.ctl |= ATA_NIEN; | |
544 | } | |
545 | ||
546 | static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, | |
547 | unsigned int tag) | |
548 | { | |
549 | if (likely(ata_tag_valid(tag))) | |
550 | return &ap->qcmd[tag]; | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) | |
555 | { | |
556 | memset(tf, 0, sizeof(*tf)); | |
557 | ||
558 | tf->ctl = ap->ctl; | |
559 | if (device == 0) | |
560 | tf->device = ATA_DEVICE_OBS; | |
561 | else | |
562 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
563 | } | |
564 | ||
0baab86b EF |
565 | |
566 | /** | |
567 | * ata_irq_on - Enable interrupts on a port. | |
568 | * @ap: Port on which interrupts are enabled. | |
569 | * | |
570 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
571 | * wait for idle, clear any pending interrupts. | |
572 | * | |
573 | * LOCKING: | |
574 | * Inherited from caller. | |
575 | */ | |
576 | ||
1da177e4 LT |
577 | static inline u8 ata_irq_on(struct ata_port *ap) |
578 | { | |
579 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
580 | u8 tmp; | |
581 | ||
582 | ap->ctl &= ~ATA_NIEN; | |
583 | ap->last_ctl = ap->ctl; | |
584 | ||
585 | if (ap->flags & ATA_FLAG_MMIO) | |
586 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
587 | else | |
588 | outb(ap->ctl, ioaddr->ctl_addr); | |
589 | tmp = ata_wait_idle(ap); | |
590 | ||
591 | ap->ops->irq_clear(ap); | |
592 | ||
593 | return tmp; | |
594 | } | |
595 | ||
0baab86b EF |
596 | |
597 | /** | |
598 | * ata_irq_ack - Acknowledge a device interrupt. | |
599 | * @ap: Port on which interrupts are enabled. | |
600 | * | |
601 | * Wait up to 10 ms for legacy IDE device to become idle (BUSY | |
602 | * or BUSY+DRQ clear). Obtain dma status and port status from | |
603 | * device. Clear the interrupt. Return port status. | |
604 | * | |
605 | * LOCKING: | |
606 | */ | |
607 | ||
1da177e4 LT |
608 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
609 | { | |
610 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; | |
611 | u8 host_stat, post_stat, status; | |
612 | ||
613 | status = ata_busy_wait(ap, bits, 1000); | |
614 | if (status & bits) | |
615 | DPRINTK("abnormal status 0x%X\n", status); | |
616 | ||
617 | /* get controller status; clear intr, err bits */ | |
618 | if (ap->flags & ATA_FLAG_MMIO) { | |
619 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
620 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
621 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
622 | mmio + ATA_DMA_STATUS); | |
623 | ||
624 | post_stat = readb(mmio + ATA_DMA_STATUS); | |
625 | } else { | |
626 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
627 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
628 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
629 | ||
630 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
631 | } | |
632 | ||
633 | VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", | |
634 | host_stat, post_stat, status); | |
635 | ||
636 | return status; | |
637 | } | |
638 | ||
639 | static inline u32 scr_read(struct ata_port *ap, unsigned int reg) | |
640 | { | |
641 | return ap->ops->scr_read(ap, reg); | |
642 | } | |
643 | ||
644 | static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) | |
645 | { | |
646 | ap->ops->scr_write(ap, reg, val); | |
647 | } | |
648 | ||
8a60a071 | 649 | static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, |
cdcca89e BR |
650 | u32 val) |
651 | { | |
652 | ap->ops->scr_write(ap, reg, val); | |
653 | (void) ap->ops->scr_read(ap, reg); | |
654 | } | |
655 | ||
1da177e4 LT |
656 | static inline unsigned int sata_dev_present(struct ata_port *ap) |
657 | { | |
658 | return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; | |
659 | } | |
660 | ||
661 | static inline int ata_try_flush_cache(struct ata_device *dev) | |
662 | { | |
663 | return ata_id_wcache_enabled(dev->id) || | |
664 | ata_id_has_flush(dev->id) || | |
665 | ata_id_has_flush_ext(dev->id); | |
666 | } | |
667 | ||
668 | #endif /* __LINUX_LIBATA_H__ */ |