Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |
| 116 | |
| 117 | ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ |
| 118 | ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ |
| 119 | ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ |
| 120 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, |
| 121 | |
| 122 | /* various lengths of time */ |
| 123 | ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ |
| 124 | ATA_TMOUT_PIO = 30 * HZ, |
| 125 | ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ |
| 126 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ |
| 127 | ATA_TMOUT_CDB = 30 * HZ, |
| 128 | ATA_TMOUT_CDB_QUICK = 5 * HZ, |
| 129 | |
| 130 | /* ATA bus states */ |
| 131 | BUS_UNKNOWN = 0, |
| 132 | BUS_DMA = 1, |
| 133 | BUS_IDLE = 2, |
| 134 | BUS_NOINTR = 3, |
| 135 | BUS_NODATA = 4, |
| 136 | BUS_TIMER = 5, |
| 137 | BUS_PIO = 6, |
| 138 | BUS_EDD = 7, |
| 139 | BUS_IDENTIFY = 8, |
| 140 | BUS_PACKET = 9, |
| 141 | |
| 142 | /* SATA port states */ |
| 143 | PORT_UNKNOWN = 0, |
| 144 | PORT_ENABLED = 1, |
| 145 | PORT_DISABLED = 2, |
| 146 | |
| 147 | /* encoding various smaller bitmaps into a single |
| 148 | * unsigned long bitmap |
| 149 | */ |
| 150 | ATA_SHIFT_UDMA = 0, |
| 151 | ATA_SHIFT_MWDMA = 8, |
| 152 | ATA_SHIFT_PIO = 11, |
| 153 | }; |
| 154 | |
| 155 | enum pio_task_states { |
| 156 | PIO_ST_UNKNOWN, |
| 157 | PIO_ST_IDLE, |
| 158 | PIO_ST_POLL, |
| 159 | PIO_ST_TMOUT, |
| 160 | PIO_ST, |
| 161 | PIO_ST_LAST, |
| 162 | PIO_ST_LAST_POLL, |
| 163 | PIO_ST_ERR, |
| 164 | }; |
| 165 | |
| 166 | /* forward declarations */ |
| 167 | struct scsi_device; |
| 168 | struct ata_port_operations; |
| 169 | struct ata_port; |
| 170 | struct ata_queued_cmd; |
| 171 | |
| 172 | /* typedefs */ |
| 173 | typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat); |
| 174 | |
| 175 | struct ata_ioports { |
| 176 | unsigned long cmd_addr; |
| 177 | unsigned long data_addr; |
| 178 | unsigned long error_addr; |
| 179 | unsigned long feature_addr; |
| 180 | unsigned long nsect_addr; |
| 181 | unsigned long lbal_addr; |
| 182 | unsigned long lbam_addr; |
| 183 | unsigned long lbah_addr; |
| 184 | unsigned long device_addr; |
| 185 | unsigned long status_addr; |
| 186 | unsigned long command_addr; |
| 187 | unsigned long altstatus_addr; |
| 188 | unsigned long ctl_addr; |
| 189 | unsigned long bmdma_addr; |
| 190 | unsigned long scr_addr; |
| 191 | }; |
| 192 | |
| 193 | struct ata_probe_ent { |
| 194 | struct list_head node; |
| 195 | struct device *dev; |
| 196 | struct ata_port_operations *port_ops; |
| 197 | Scsi_Host_Template *sht; |
| 198 | struct ata_ioports port[ATA_MAX_PORTS]; |
| 199 | unsigned int n_ports; |
| 200 | unsigned int hard_port_no; |
| 201 | unsigned int pio_mask; |
| 202 | unsigned int mwdma_mask; |
| 203 | unsigned int udma_mask; |
| 204 | unsigned int legacy_mode; |
| 205 | unsigned long irq; |
| 206 | unsigned int irq_flags; |
| 207 | unsigned long host_flags; |
| 208 | void __iomem *mmio_base; |
| 209 | void *private_data; |
| 210 | }; |
| 211 | |
| 212 | struct ata_host_set { |
| 213 | spinlock_t lock; |
| 214 | struct device *dev; |
| 215 | unsigned long irq; |
| 216 | void __iomem *mmio_base; |
| 217 | unsigned int n_ports; |
| 218 | void *private_data; |
| 219 | struct ata_port_operations *ops; |
| 220 | struct ata_port * ports[0]; |
| 221 | }; |
| 222 | |
| 223 | struct ata_queued_cmd { |
| 224 | struct ata_port *ap; |
| 225 | struct ata_device *dev; |
| 226 | |
| 227 | struct scsi_cmnd *scsicmd; |
| 228 | void (*scsidone)(struct scsi_cmnd *); |
| 229 | |
| 230 | struct ata_taskfile tf; |
| 231 | u8 cdb[ATAPI_CDB_LEN]; |
| 232 | |
| 233 | unsigned long flags; /* ATA_QCFLAG_xxx */ |
| 234 | unsigned int tag; |
| 235 | unsigned int n_elem; |
| 236 | |
| 237 | int dma_dir; |
| 238 | |
| 239 | unsigned int nsect; |
| 240 | unsigned int cursect; |
| 241 | |
| 242 | unsigned int nbytes; |
| 243 | unsigned int curbytes; |
| 244 | |
| 245 | unsigned int cursg; |
| 246 | unsigned int cursg_ofs; |
| 247 | |
| 248 | struct scatterlist sgent; |
| 249 | void *buf_virt; |
| 250 | |
| 251 | struct scatterlist *sg; |
| 252 | |
| 253 | ata_qc_cb_t complete_fn; |
| 254 | |
| 255 | struct completion *waiting; |
| 256 | |
| 257 | void *private_data; |
| 258 | }; |
| 259 | |
| 260 | struct ata_host_stats { |
| 261 | unsigned long unhandled_irq; |
| 262 | unsigned long idle_irq; |
| 263 | unsigned long rw_reqbuf; |
| 264 | }; |
| 265 | |
| 266 | struct ata_device { |
| 267 | u64 n_sectors; /* size of device, if ATA */ |
| 268 | unsigned long flags; /* ATA_DFLAG_xxx */ |
| 269 | unsigned int class; /* ATA_DEV_xxx */ |
| 270 | unsigned int devno; /* 0 or 1 */ |
| 271 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ |
| 272 | u8 pio_mode; |
| 273 | u8 dma_mode; |
| 274 | u8 xfer_mode; |
| 275 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ |
| 276 | |
| 277 | /* cache info about current transfer mode */ |
| 278 | u8 xfer_protocol; /* taskfile xfer protocol */ |
| 279 | u8 read_cmd; /* opcode to use on read */ |
| 280 | u8 write_cmd; /* opcode to use on write */ |
| 281 | }; |
| 282 | |
| 283 | struct ata_port { |
| 284 | struct Scsi_Host *host; /* our co-allocated scsi host */ |
| 285 | struct ata_port_operations *ops; |
| 286 | unsigned long flags; /* ATA_FLAG_xxx */ |
| 287 | unsigned int id; /* unique id req'd by scsi midlyr */ |
| 288 | unsigned int port_no; /* unique port #; from zero */ |
| 289 | unsigned int hard_port_no; /* hardware port #; from zero */ |
| 290 | |
| 291 | struct ata_prd *prd; /* our SG list */ |
| 292 | dma_addr_t prd_dma; /* and its DMA mapping */ |
| 293 | |
| 294 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
| 295 | |
| 296 | u8 ctl; /* cache of ATA control register */ |
| 297 | u8 last_ctl; /* Cache last written value */ |
| 298 | unsigned int bus_state; |
| 299 | unsigned int port_state; |
| 300 | unsigned int pio_mask; |
| 301 | unsigned int mwdma_mask; |
| 302 | unsigned int udma_mask; |
| 303 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ |
| 304 | unsigned int cdb_len; |
| 305 | |
| 306 | struct ata_device device[ATA_MAX_DEVICES]; |
| 307 | |
| 308 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; |
| 309 | unsigned long qactive; |
| 310 | unsigned int active_tag; |
| 311 | |
| 312 | struct ata_host_stats stats; |
| 313 | struct ata_host_set *host_set; |
| 314 | |
| 315 | struct work_struct packet_task; |
| 316 | |
| 317 | struct work_struct pio_task; |
| 318 | unsigned int pio_task_state; |
| 319 | unsigned long pio_task_timeout; |
| 320 | |
| 321 | void *private_data; |
| 322 | }; |
| 323 | |
| 324 | struct ata_port_operations { |
| 325 | void (*port_disable) (struct ata_port *); |
| 326 | |
| 327 | void (*dev_config) (struct ata_port *, struct ata_device *); |
| 328 | |
| 329 | void (*set_piomode) (struct ata_port *, struct ata_device *); |
| 330 | void (*set_dmamode) (struct ata_port *, struct ata_device *); |
| 331 | |
| 332 | void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); |
| 333 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
| 334 | |
| 335 | void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); |
| 336 | u8 (*check_status)(struct ata_port *ap); |
| 337 | u8 (*check_altstatus)(struct ata_port *ap); |
| 338 | u8 (*check_err)(struct ata_port *ap); |
| 339 | void (*dev_select)(struct ata_port *ap, unsigned int device); |
| 340 | |
| 341 | void (*phy_reset) (struct ata_port *ap); |
| 342 | void (*post_set_mode) (struct ata_port *ap); |
| 343 | |
| 344 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); |
| 345 | |
| 346 | void (*bmdma_setup) (struct ata_queued_cmd *qc); |
| 347 | void (*bmdma_start) (struct ata_queued_cmd *qc); |
| 348 | |
| 349 | void (*qc_prep) (struct ata_queued_cmd *qc); |
| 350 | int (*qc_issue) (struct ata_queued_cmd *qc); |
| 351 | |
| 352 | void (*eng_timeout) (struct ata_port *ap); |
| 353 | |
| 354 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); |
| 355 | void (*irq_clear) (struct ata_port *); |
| 356 | |
| 357 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); |
| 358 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, |
| 359 | u32 val); |
| 360 | |
| 361 | int (*port_start) (struct ata_port *ap); |
| 362 | void (*port_stop) (struct ata_port *ap); |
| 363 | |
| 364 | void (*host_stop) (struct ata_host_set *host_set); |
| 365 | |
| 366 | void (*bmdma_stop) (struct ata_port *ap); |
| 367 | u8 (*bmdma_status) (struct ata_port *ap); |
| 368 | }; |
| 369 | |
| 370 | struct ata_port_info { |
| 371 | Scsi_Host_Template *sht; |
| 372 | unsigned long host_flags; |
| 373 | unsigned long pio_mask; |
| 374 | unsigned long mwdma_mask; |
| 375 | unsigned long udma_mask; |
| 376 | struct ata_port_operations *port_ops; |
| 377 | }; |
| 378 | |
| 379 | |
| 380 | extern void ata_port_probe(struct ata_port *); |
| 381 | extern void __sata_phy_reset(struct ata_port *ap); |
| 382 | extern void sata_phy_reset(struct ata_port *ap); |
| 383 | extern void ata_bus_reset(struct ata_port *ap); |
| 384 | extern void ata_port_disable(struct ata_port *); |
| 385 | extern void ata_std_ports(struct ata_ioports *ioaddr); |
| 386 | #ifdef CONFIG_PCI |
| 387 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, |
| 388 | unsigned int n_ports); |
| 389 | extern void ata_pci_remove_one (struct pci_dev *pdev); |
| 390 | #endif /* CONFIG_PCI */ |
| 391 | extern int ata_device_add(struct ata_probe_ent *ent); |
| 392 | extern int ata_scsi_detect(Scsi_Host_Template *sht); |
| 393 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); |
| 394 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); |
| 395 | extern int ata_scsi_error(struct Scsi_Host *host); |
| 396 | extern int ata_scsi_release(struct Scsi_Host *host); |
| 397 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
| 398 | /* |
| 399 | * Default driver ops implementations |
| 400 | */ |
| 401 | extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); |
| 402 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
| 403 | extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); |
| 404 | extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); |
| 405 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
| 406 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); |
| 407 | extern u8 ata_check_status(struct ata_port *ap); |
| 408 | extern u8 ata_altstatus(struct ata_port *ap); |
| 409 | extern u8 ata_chk_err(struct ata_port *ap); |
| 410 | extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); |
| 411 | extern int ata_port_start (struct ata_port *ap); |
| 412 | extern void ata_port_stop (struct ata_port *ap); |
| 413 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
| 414 | extern void ata_qc_prep(struct ata_queued_cmd *qc); |
| 415 | extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
| 416 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
| 417 | unsigned int buflen); |
| 418 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 419 | unsigned int n_elem); |
| 420 | extern unsigned int ata_dev_classify(struct ata_taskfile *tf); |
| 421 | extern void ata_dev_id_string(u16 *id, unsigned char *s, |
| 422 | unsigned int ofs, unsigned int len); |
| 423 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
| 424 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); |
| 425 | extern void ata_bmdma_stop(struct ata_port *ap); |
| 426 | extern u8 ata_bmdma_status(struct ata_port *ap); |
| 427 | extern void ata_bmdma_irq_clear(struct ata_port *ap); |
| 428 | extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); |
| 429 | extern void ata_eng_timeout(struct ata_port *ap); |
| 430 | extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, |
| 431 | void (*done)(struct scsi_cmnd *)); |
| 432 | extern int ata_std_bios_param(struct scsi_device *sdev, |
| 433 | struct block_device *bdev, |
| 434 | sector_t capacity, int geom[]); |
| 435 | extern int ata_scsi_slave_config(struct scsi_device *sdev); |
| 436 | |
| 437 | |
| 438 | #ifdef CONFIG_PCI |
| 439 | struct pci_bits { |
| 440 | unsigned int reg; /* PCI config register to read */ |
| 441 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ |
| 442 | unsigned long mask; |
| 443 | unsigned long val; |
| 444 | }; |
| 445 | |
| 446 | extern struct ata_probe_ent * |
| 447 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); |
| 448 | extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); |
| 449 | |
| 450 | #endif /* CONFIG_PCI */ |
| 451 | |
| 452 | |
| 453 | static inline unsigned int ata_tag_valid(unsigned int tag) |
| 454 | { |
| 455 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; |
| 456 | } |
| 457 | |
| 458 | static inline unsigned int ata_dev_present(struct ata_device *dev) |
| 459 | { |
| 460 | return ((dev->class == ATA_DEV_ATA) || |
| 461 | (dev->class == ATA_DEV_ATAPI)); |
| 462 | } |
| 463 | |
| 464 | static inline u8 ata_chk_status(struct ata_port *ap) |
| 465 | { |
| 466 | return ap->ops->check_status(ap); |
| 467 | } |
| 468 | |
| 469 | static inline void ata_pause(struct ata_port *ap) |
| 470 | { |
| 471 | ata_altstatus(ap); |
| 472 | ndelay(400); |
| 473 | } |
| 474 | |
| 475 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
| 476 | unsigned int max) |
| 477 | { |
| 478 | u8 status; |
| 479 | |
| 480 | do { |
| 481 | udelay(10); |
| 482 | status = ata_chk_status(ap); |
| 483 | max--; |
| 484 | } while ((status & bits) && (max > 0)); |
| 485 | |
| 486 | return status; |
| 487 | } |
| 488 | |
| 489 | static inline u8 ata_wait_idle(struct ata_port *ap) |
| 490 | { |
| 491 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); |
| 492 | |
| 493 | if (status & (ATA_BUSY | ATA_DRQ)) { |
| 494 | unsigned long l = ap->ioaddr.status_addr; |
| 495 | printk(KERN_WARNING |
| 496 | "ATA: abnormal status 0x%X on port 0x%lX\n", |
| 497 | status, l); |
| 498 | } |
| 499 | |
| 500 | return status; |
| 501 | } |
| 502 | |
| 503 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) |
| 504 | { |
| 505 | qc->tf.ctl |= ATA_NIEN; |
| 506 | } |
| 507 | |
| 508 | static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, |
| 509 | unsigned int tag) |
| 510 | { |
| 511 | if (likely(ata_tag_valid(tag))) |
| 512 | return &ap->qcmd[tag]; |
| 513 | return NULL; |
| 514 | } |
| 515 | |
| 516 | static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) |
| 517 | { |
| 518 | memset(tf, 0, sizeof(*tf)); |
| 519 | |
| 520 | tf->ctl = ap->ctl; |
| 521 | if (device == 0) |
| 522 | tf->device = ATA_DEVICE_OBS; |
| 523 | else |
| 524 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; |
| 525 | } |
| 526 | |
| 527 | static inline u8 ata_irq_on(struct ata_port *ap) |
| 528 | { |
| 529 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 530 | u8 tmp; |
| 531 | |
| 532 | ap->ctl &= ~ATA_NIEN; |
| 533 | ap->last_ctl = ap->ctl; |
| 534 | |
| 535 | if (ap->flags & ATA_FLAG_MMIO) |
| 536 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 537 | else |
| 538 | outb(ap->ctl, ioaddr->ctl_addr); |
| 539 | tmp = ata_wait_idle(ap); |
| 540 | |
| 541 | ap->ops->irq_clear(ap); |
| 542 | |
| 543 | return tmp; |
| 544 | } |
| 545 | |
| 546 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
| 547 | { |
| 548 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; |
| 549 | u8 host_stat, post_stat, status; |
| 550 | |
| 551 | status = ata_busy_wait(ap, bits, 1000); |
| 552 | if (status & bits) |
| 553 | DPRINTK("abnormal status 0x%X\n", status); |
| 554 | |
| 555 | /* get controller status; clear intr, err bits */ |
| 556 | if (ap->flags & ATA_FLAG_MMIO) { |
| 557 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 558 | host_stat = readb(mmio + ATA_DMA_STATUS); |
| 559 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, |
| 560 | mmio + ATA_DMA_STATUS); |
| 561 | |
| 562 | post_stat = readb(mmio + ATA_DMA_STATUS); |
| 563 | } else { |
| 564 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 565 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, |
| 566 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 567 | |
| 568 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 569 | } |
| 570 | |
| 571 | VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", |
| 572 | host_stat, post_stat, status); |
| 573 | |
| 574 | return status; |
| 575 | } |
| 576 | |
| 577 | static inline u32 scr_read(struct ata_port *ap, unsigned int reg) |
| 578 | { |
| 579 | return ap->ops->scr_read(ap, reg); |
| 580 | } |
| 581 | |
| 582 | static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) |
| 583 | { |
| 584 | ap->ops->scr_write(ap, reg, val); |
| 585 | } |
| 586 | |
| 587 | static inline unsigned int sata_dev_present(struct ata_port *ap) |
| 588 | { |
| 589 | return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; |
| 590 | } |
| 591 | |
| 592 | static inline int ata_try_flush_cache(struct ata_device *dev) |
| 593 | { |
| 594 | return ata_id_wcache_enabled(dev->id) || |
| 595 | ata_id_has_flush(dev->id) || |
| 596 | ata_id_has_flush_ext(dev->id); |
| 597 | } |
| 598 | |
| 599 | #endif /* __LINUX_LIBATA_H__ */ |