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1da177e4 | 1 | /* |
af36d7f0 JG |
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 | * | |
1da177e4 LT |
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 */ | |
1da177e4 LT |
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, | |
cf482935 | 94 | ATA_SHT_USE_CLUSTERING = 1, |
1da177e4 LT |
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 */ | |
8bf62ece | 100 | ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */ |
1da177e4 LT |
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 */ | |
c1389503 TH |
119 | ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once |
120 | * proper HSM is in place. */ | |
1da177e4 LT |
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, | |
47a86593 AC |
158 | |
159 | /* Masks for port functions */ | |
160 | ATA_PORT_PRIMARY = (1 << 0), | |
161 | ATA_PORT_SECONDARY = (1 << 1), | |
1da177e4 LT |
162 | }; |
163 | ||
14be71f4 AL |
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, | |
1da177e4 LT |
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; | |
057ace5e | 205 | const struct ata_port_operations *port_ops; |
1da177e4 LT |
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; | |
057ace5e | 228 | const struct ata_port_operations *ops; |
1da177e4 LT |
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 | ||
8cbd6df1 AL |
286 | unsigned int multi_count; /* sectors count for |
287 | READ/WRITE MULTIPLE */ | |
8bf62ece AL |
288 | |
289 | /* for CHS addressing */ | |
290 | u16 cylinders; /* Number of cylinders */ | |
291 | u16 heads; /* Number of heads */ | |
292 | u16 sectors; /* Number of sectors per track */ | |
1da177e4 LT |
293 | }; |
294 | ||
295 | struct ata_port { | |
296 | struct Scsi_Host *host; /* our co-allocated scsi host */ | |
057ace5e | 297 | const struct ata_port_operations *ops; |
1da177e4 LT |
298 | unsigned long flags; /* ATA_FLAG_xxx */ |
299 | unsigned int id; /* unique id req'd by scsi midlyr */ | |
300 | unsigned int port_no; /* unique port #; from zero */ | |
301 | unsigned int hard_port_no; /* hardware port #; from zero */ | |
302 | ||
303 | struct ata_prd *prd; /* our SG list */ | |
304 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
305 | ||
306 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ | |
307 | ||
308 | u8 ctl; /* cache of ATA control register */ | |
309 | u8 last_ctl; /* Cache last written value */ | |
310 | unsigned int bus_state; | |
311 | unsigned int port_state; | |
312 | unsigned int pio_mask; | |
313 | unsigned int mwdma_mask; | |
314 | unsigned int udma_mask; | |
315 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
316 | unsigned int cdb_len; | |
317 | ||
318 | struct ata_device device[ATA_MAX_DEVICES]; | |
319 | ||
320 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
321 | unsigned long qactive; | |
322 | unsigned int active_tag; | |
323 | ||
324 | struct ata_host_stats stats; | |
325 | struct ata_host_set *host_set; | |
326 | ||
327 | struct work_struct packet_task; | |
328 | ||
329 | struct work_struct pio_task; | |
14be71f4 | 330 | unsigned int hsm_task_state; |
1da177e4 LT |
331 | unsigned long pio_task_timeout; |
332 | ||
333 | void *private_data; | |
334 | }; | |
335 | ||
336 | struct ata_port_operations { | |
337 | void (*port_disable) (struct ata_port *); | |
338 | ||
339 | void (*dev_config) (struct ata_port *, struct ata_device *); | |
340 | ||
341 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
342 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
343 | ||
057ace5e | 344 | void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
345 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
346 | ||
057ace5e | 347 | void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
348 | u8 (*check_status)(struct ata_port *ap); |
349 | u8 (*check_altstatus)(struct ata_port *ap); | |
350 | u8 (*check_err)(struct ata_port *ap); | |
351 | void (*dev_select)(struct ata_port *ap, unsigned int device); | |
352 | ||
353 | void (*phy_reset) (struct ata_port *ap); | |
354 | void (*post_set_mode) (struct ata_port *ap); | |
355 | ||
356 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); | |
357 | ||
358 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
359 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
360 | ||
361 | void (*qc_prep) (struct ata_queued_cmd *qc); | |
362 | int (*qc_issue) (struct ata_queued_cmd *qc); | |
363 | ||
364 | void (*eng_timeout) (struct ata_port *ap); | |
365 | ||
366 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); | |
367 | void (*irq_clear) (struct ata_port *); | |
368 | ||
369 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); | |
370 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, | |
371 | u32 val); | |
372 | ||
373 | int (*port_start) (struct ata_port *ap); | |
374 | void (*port_stop) (struct ata_port *ap); | |
375 | ||
376 | void (*host_stop) (struct ata_host_set *host_set); | |
377 | ||
b73fc89f | 378 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
1da177e4 LT |
379 | u8 (*bmdma_status) (struct ata_port *ap); |
380 | }; | |
381 | ||
382 | struct ata_port_info { | |
383 | Scsi_Host_Template *sht; | |
384 | unsigned long host_flags; | |
385 | unsigned long pio_mask; | |
386 | unsigned long mwdma_mask; | |
387 | unsigned long udma_mask; | |
057ace5e | 388 | const struct ata_port_operations *port_ops; |
1da177e4 LT |
389 | }; |
390 | ||
452503f9 AC |
391 | struct ata_timing { |
392 | unsigned short mode; /* ATA mode */ | |
393 | unsigned short setup; /* t1 */ | |
394 | unsigned short act8b; /* t2 for 8-bit I/O */ | |
395 | unsigned short rec8b; /* t2i for 8-bit I/O */ | |
396 | unsigned short cyc8b; /* t0 for 8-bit I/O */ | |
397 | unsigned short active; /* t2 or tD */ | |
398 | unsigned short recover; /* t2i or tK */ | |
399 | unsigned short cycle; /* t0 */ | |
400 | unsigned short udma; /* t2CYCTYP/2 */ | |
401 | }; | |
402 | ||
403 | #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) | |
1da177e4 LT |
404 | |
405 | extern void ata_port_probe(struct ata_port *); | |
406 | extern void __sata_phy_reset(struct ata_port *ap); | |
407 | extern void sata_phy_reset(struct ata_port *ap); | |
408 | extern void ata_bus_reset(struct ata_port *ap); | |
409 | extern void ata_port_disable(struct ata_port *); | |
410 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
411 | #ifdef CONFIG_PCI | |
412 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, | |
413 | unsigned int n_ports); | |
414 | extern void ata_pci_remove_one (struct pci_dev *pdev); | |
415 | #endif /* CONFIG_PCI */ | |
057ace5e | 416 | extern int ata_device_add(const struct ata_probe_ent *ent); |
17b14451 | 417 | extern void ata_host_set_remove(struct ata_host_set *host_set); |
1da177e4 LT |
418 | extern int ata_scsi_detect(Scsi_Host_Template *sht); |
419 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); | |
420 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
421 | extern int ata_scsi_error(struct Scsi_Host *host); | |
422 | extern int ata_scsi_release(struct Scsi_Host *host); | |
423 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); | |
67846b30 JG |
424 | extern int ata_ratelimit(void); |
425 | ||
1da177e4 LT |
426 | /* |
427 | * Default driver ops implementations | |
428 | */ | |
057ace5e | 429 | extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 | 430 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
057ace5e JG |
431 | extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); |
432 | extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); | |
1da177e4 LT |
433 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
434 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
435 | extern u8 ata_check_status(struct ata_port *ap); | |
436 | extern u8 ata_altstatus(struct ata_port *ap); | |
437 | extern u8 ata_chk_err(struct ata_port *ap); | |
057ace5e | 438 | extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
439 | extern int ata_port_start (struct ata_port *ap); |
440 | extern void ata_port_stop (struct ata_port *ap); | |
aa8f0dc6 | 441 | extern void ata_host_stop (struct ata_host_set *host_set); |
1da177e4 LT |
442 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
443 | extern void ata_qc_prep(struct ata_queued_cmd *qc); | |
444 | extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); | |
445 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, | |
446 | unsigned int buflen); | |
447 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
448 | unsigned int n_elem); | |
057ace5e JG |
449 | extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); |
450 | extern void ata_dev_id_string(const u16 *id, unsigned char *s, | |
1da177e4 | 451 | unsigned int ofs, unsigned int len); |
6f2f3812 | 452 | extern void ata_dev_config(struct ata_port *ap, unsigned int i); |
1da177e4 LT |
453 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
454 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
b73fc89f | 455 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
1da177e4 LT |
456 | extern u8 ata_bmdma_status(struct ata_port *ap); |
457 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
458 | extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); | |
459 | extern void ata_eng_timeout(struct ata_port *ap); | |
460 | extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, | |
461 | void (*done)(struct scsi_cmnd *)); | |
462 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
463 | struct block_device *bdev, | |
464 | sector_t capacity, int geom[]); | |
465 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
466 | ||
452503f9 AC |
467 | /* |
468 | * Timing helpers | |
469 | */ | |
470 | extern int ata_timing_compute(struct ata_device *, unsigned short, | |
471 | struct ata_timing *, int, int); | |
472 | extern void ata_timing_merge(const struct ata_timing *, | |
473 | const struct ata_timing *, struct ata_timing *, | |
474 | unsigned int); | |
475 | ||
476 | enum { | |
477 | ATA_TIMING_SETUP = (1 << 0), | |
478 | ATA_TIMING_ACT8B = (1 << 1), | |
479 | ATA_TIMING_REC8B = (1 << 2), | |
480 | ATA_TIMING_CYC8B = (1 << 3), | |
481 | ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | | |
482 | ATA_TIMING_CYC8B, | |
483 | ATA_TIMING_ACTIVE = (1 << 4), | |
484 | ATA_TIMING_RECOVER = (1 << 5), | |
485 | ATA_TIMING_CYCLE = (1 << 6), | |
486 | ATA_TIMING_UDMA = (1 << 7), | |
487 | ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | | |
488 | ATA_TIMING_REC8B | ATA_TIMING_CYC8B | | |
489 | ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | | |
490 | ATA_TIMING_CYCLE | ATA_TIMING_UDMA, | |
491 | }; | |
492 | ||
1da177e4 LT |
493 | |
494 | #ifdef CONFIG_PCI | |
495 | struct pci_bits { | |
496 | unsigned int reg; /* PCI config register to read */ | |
497 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
498 | unsigned long mask; | |
499 | unsigned long val; | |
500 | }; | |
501 | ||
374b1873 | 502 | extern void ata_pci_host_stop (struct ata_host_set *host_set); |
1da177e4 | 503 | extern struct ata_probe_ent * |
47a86593 | 504 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); |
057ace5e | 505 | extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); |
1da177e4 LT |
506 | |
507 | #endif /* CONFIG_PCI */ | |
508 | ||
509 | ||
510 | static inline unsigned int ata_tag_valid(unsigned int tag) | |
511 | { | |
512 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
513 | } | |
514 | ||
057ace5e | 515 | static inline unsigned int ata_dev_present(const struct ata_device *dev) |
1da177e4 LT |
516 | { |
517 | return ((dev->class == ATA_DEV_ATA) || | |
518 | (dev->class == ATA_DEV_ATAPI)); | |
519 | } | |
520 | ||
521 | static inline u8 ata_chk_status(struct ata_port *ap) | |
522 | { | |
523 | return ap->ops->check_status(ap); | |
524 | } | |
525 | ||
0baab86b EF |
526 | |
527 | /** | |
528 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
529 | * @ap: Port to wait for. | |
530 | * | |
531 | * LOCKING: | |
532 | * Inherited from caller. | |
533 | */ | |
534 | ||
1da177e4 LT |
535 | static inline void ata_pause(struct ata_port *ap) |
536 | { | |
537 | ata_altstatus(ap); | |
538 | ndelay(400); | |
539 | } | |
540 | ||
0baab86b EF |
541 | |
542 | /** | |
543 | * ata_busy_wait - Wait for a port status register | |
544 | * @ap: Port to wait for. | |
545 | * | |
546 | * Waits up to max*10 microseconds for the selected bits in the port's | |
547 | * status register to be cleared. | |
548 | * Returns final value of status register. | |
549 | * | |
550 | * LOCKING: | |
551 | * Inherited from caller. | |
552 | */ | |
553 | ||
1da177e4 LT |
554 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
555 | unsigned int max) | |
556 | { | |
557 | u8 status; | |
558 | ||
559 | do { | |
560 | udelay(10); | |
561 | status = ata_chk_status(ap); | |
562 | max--; | |
563 | } while ((status & bits) && (max > 0)); | |
564 | ||
565 | return status; | |
566 | } | |
567 | ||
0baab86b EF |
568 | |
569 | /** | |
570 | * ata_wait_idle - Wait for a port to be idle. | |
571 | * @ap: Port to wait for. | |
572 | * | |
573 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
574 | * Returns final value of status register. | |
575 | * | |
576 | * LOCKING: | |
577 | * Inherited from caller. | |
578 | */ | |
579 | ||
1da177e4 LT |
580 | static inline u8 ata_wait_idle(struct ata_port *ap) |
581 | { | |
582 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
583 | ||
584 | if (status & (ATA_BUSY | ATA_DRQ)) { | |
585 | unsigned long l = ap->ioaddr.status_addr; | |
586 | printk(KERN_WARNING | |
587 | "ATA: abnormal status 0x%X on port 0x%lX\n", | |
588 | status, l); | |
589 | } | |
590 | ||
591 | return status; | |
592 | } | |
593 | ||
594 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
595 | { | |
596 | qc->tf.ctl |= ATA_NIEN; | |
597 | } | |
598 | ||
599 | static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, | |
600 | unsigned int tag) | |
601 | { | |
602 | if (likely(ata_tag_valid(tag))) | |
603 | return &ap->qcmd[tag]; | |
604 | return NULL; | |
605 | } | |
606 | ||
607 | static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) | |
608 | { | |
609 | memset(tf, 0, sizeof(*tf)); | |
610 | ||
611 | tf->ctl = ap->ctl; | |
612 | if (device == 0) | |
613 | tf->device = ATA_DEVICE_OBS; | |
614 | else | |
615 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
616 | } | |
617 | ||
0baab86b EF |
618 | |
619 | /** | |
620 | * ata_irq_on - Enable interrupts on a port. | |
621 | * @ap: Port on which interrupts are enabled. | |
622 | * | |
623 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
624 | * wait for idle, clear any pending interrupts. | |
625 | * | |
626 | * LOCKING: | |
627 | * Inherited from caller. | |
628 | */ | |
629 | ||
1da177e4 LT |
630 | static inline u8 ata_irq_on(struct ata_port *ap) |
631 | { | |
632 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
633 | u8 tmp; | |
634 | ||
635 | ap->ctl &= ~ATA_NIEN; | |
636 | ap->last_ctl = ap->ctl; | |
637 | ||
638 | if (ap->flags & ATA_FLAG_MMIO) | |
639 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
640 | else | |
641 | outb(ap->ctl, ioaddr->ctl_addr); | |
642 | tmp = ata_wait_idle(ap); | |
643 | ||
644 | ap->ops->irq_clear(ap); | |
645 | ||
646 | return tmp; | |
647 | } | |
648 | ||
0baab86b EF |
649 | |
650 | /** | |
651 | * ata_irq_ack - Acknowledge a device interrupt. | |
652 | * @ap: Port on which interrupts are enabled. | |
653 | * | |
654 | * Wait up to 10 ms for legacy IDE device to become idle (BUSY | |
655 | * or BUSY+DRQ clear). Obtain dma status and port status from | |
656 | * device. Clear the interrupt. Return port status. | |
657 | * | |
658 | * LOCKING: | |
659 | */ | |
660 | ||
1da177e4 LT |
661 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
662 | { | |
663 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; | |
664 | u8 host_stat, post_stat, status; | |
665 | ||
666 | status = ata_busy_wait(ap, bits, 1000); | |
667 | if (status & bits) | |
668 | DPRINTK("abnormal status 0x%X\n", status); | |
669 | ||
670 | /* get controller status; clear intr, err bits */ | |
671 | if (ap->flags & ATA_FLAG_MMIO) { | |
672 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
673 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
674 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
675 | mmio + ATA_DMA_STATUS); | |
676 | ||
677 | post_stat = readb(mmio + ATA_DMA_STATUS); | |
678 | } else { | |
679 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
680 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
681 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
682 | ||
683 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
684 | } | |
685 | ||
686 | VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", | |
687 | host_stat, post_stat, status); | |
688 | ||
689 | return status; | |
690 | } | |
691 | ||
692 | static inline u32 scr_read(struct ata_port *ap, unsigned int reg) | |
693 | { | |
694 | return ap->ops->scr_read(ap, reg); | |
695 | } | |
696 | ||
697 | static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) | |
698 | { | |
699 | ap->ops->scr_write(ap, reg, val); | |
700 | } | |
701 | ||
8a60a071 | 702 | static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, |
cdcca89e BR |
703 | u32 val) |
704 | { | |
705 | ap->ops->scr_write(ap, reg, val); | |
706 | (void) ap->ops->scr_read(ap, reg); | |
707 | } | |
708 | ||
1da177e4 LT |
709 | static inline unsigned int sata_dev_present(struct ata_port *ap) |
710 | { | |
711 | return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; | |
712 | } | |
713 | ||
057ace5e | 714 | static inline int ata_try_flush_cache(const struct ata_device *dev) |
1da177e4 LT |
715 | { |
716 | return ata_id_wcache_enabled(dev->id) || | |
717 | ata_id_has_flush(dev->id) || | |
718 | ata_id_has_flush_ext(dev->id); | |
719 | } | |
720 | ||
721 | #endif /* __LINUX_LIBATA_H__ */ |