wdcvar.h revision 1.52
1/* $OpenBSD: wdcvar.h,v 1.52 2011/07/15 16:44:17 deraadt Exp $ */ 2/* $NetBSD: wdcvar.h,v 1.17 1999/04/11 20:50:29 bouyer Exp $ */ 3 4/*- 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Charles M. Hannum, by Onno van der Linden and by Manuel Bouyer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#ifndef _DEV_IC_WDCVAR_H_ 34#define _DEV_IC_WDCVAR_H_ 35 36#include <sys/timeout.h> 37 38struct channel_queue { /* per channel queue (may be shared) */ 39 TAILQ_HEAD(xferhead, wdc_xfer) sc_xfer; 40}; 41 42struct channel_softc_vtbl; 43 44 45#define WDC_OPTION_PROBE_VERBOSE 0x10000 46 47struct channel_softc { /* Per channel data */ 48 struct channel_softc_vtbl *_vtbl; 49 50 /* Our location */ 51 int channel; 52 /* Our controller's softc */ 53 struct wdc_softc *wdc; 54 /* Our registers */ 55 bus_space_tag_t cmd_iot; 56 bus_space_handle_t cmd_ioh; 57 bus_size_t cmd_iosz; 58 bus_space_tag_t ctl_iot; 59 bus_space_handle_t ctl_ioh; 60 bus_size_t ctl_iosz; 61 /* data32{iot,ioh} are only used for 32 bit xfers */ 62 bus_space_tag_t data32iot; 63 bus_space_handle_t data32ioh; 64 /* Our state */ 65 int ch_flags; 66#define WDCF_ACTIVE 0x01 /* channel is active */ 67#define WDCF_ONESLAVE 0x02 /* slave-only channel */ 68#define WDCF_IRQ_WAIT 0x10 /* controller is waiting for irq */ 69#define WDCF_DMA_WAIT 0x20 /* controller is waiting for DMA */ 70#define WDCF_VERBOSE_PROBE 0x40 /* verbose probe */ 71#define WDCF_DMA_BEFORE_CMD 0x80 /* start dma before a command */ 72 u_int8_t ch_status; /* copy of status register */ 73 u_int8_t ch_prev_log_status; /* previous logged value of status reg */ 74 u_int8_t ch_log_idx; 75 u_int8_t ch_error; /* copy of error register */ 76 /* per-drive infos */ 77 struct ata_drive_datas ch_drive[2]; 78 79 /* 80 * channel queues. May be the same for all channels, if hw channels 81 * are not independent. 82 */ 83 struct channel_queue *ch_queue; 84 struct timeout ch_timo; 85 86 int dying; 87}; 88 89/* 90 * Disk Controller register definitions. 91 */ 92#define _WDC_REGMASK 7 93#define _WDC_AUX 8 94#define _WDC_RDONLY 16 95#define _WDC_WRONLY 32 96enum wdc_regs { 97 wdr_error = _WDC_RDONLY | 1, 98 wdr_precomp = _WDC_WRONLY | 1, 99 wdr_features = _WDC_WRONLY | 1, 100 wdr_seccnt = 2, 101 wdr_ireason = 2, 102 wdr_sector = 3, 103 wdr_lba_lo = 3, 104 wdr_cyl_lo = 4, 105 wdr_lba_mi = 4, 106 wdr_cyl_hi = 5, 107 wdr_lba_hi = 5, 108 wdr_sdh = 6, 109 wdr_status = _WDC_RDONLY | 7, 110 wdr_command = _WDC_WRONLY | 7, 111 wdr_altsts = _WDC_RDONLY | _WDC_AUX, 112 wdr_ctlr = _WDC_WRONLY | _WDC_AUX 113}; 114 115#define WDC_NREG 8 /* number of command registers */ 116#define WDC_NSHADOWREG 2 /* number of command "shadow" registers */ 117 118struct channel_softc_vtbl { 119 u_int8_t (*read_reg)(struct channel_softc *, enum wdc_regs reg); 120 void (*write_reg)(struct channel_softc *, enum wdc_regs reg, 121 u_int8_t var); 122 void (*lba48_write_reg)(struct channel_softc *, enum wdc_regs reg, 123 u_int16_t var); 124 125 void (*read_raw_multi_2)(struct channel_softc *, 126 void *data, unsigned int nbytes); 127 void (*write_raw_multi_2)(struct channel_softc *, 128 void *data, unsigned int nbytes); 129 130 void (*read_raw_multi_4)(struct channel_softc *, 131 void *data, unsigned int nbytes); 132 void (*write_raw_multi_4)(struct channel_softc *, 133 void *data, unsigned int nbytes); 134}; 135 136 137#define CHP_READ_REG(chp, a) ((chp)->_vtbl->read_reg)(chp, a) 138#define CHP_WRITE_REG(chp, a, b) ((chp)->_vtbl->write_reg)(chp, a, b) 139#define CHP_LBA48_WRITE_REG(chp, a, b) \ 140 ((chp)->_vtbl->lba48_write_reg)(chp, a, b) 141 142#define CHP_READ_RAW_MULTI_2(chp, a, b) \ 143 ((chp)->_vtbl->read_raw_multi_2)(chp, a, b) 144#define CHP_WRITE_RAW_MULTI_2(chp, a, b) \ 145 ((chp)->_vtbl->write_raw_multi_2)(chp, a, b) 146#define CHP_READ_RAW_MULTI_4(chp, a, b) \ 147 ((chp)->_vtbl->read_raw_multi_4)(chp, a, b) 148#define CHP_WRITE_RAW_MULTI_4(chp, a, b) \ 149 ((chp)->_vtbl->write_raw_multi_4)(chp, a, b) 150 151struct wdc_softc { /* Per controller state */ 152 struct device sc_dev; 153 /* mandatory fields */ 154 int cap; 155/* Capabilities supported by the controller */ 156#define WDC_CAPABILITY_DATA16 0x0001 /* can do 16-bit data access */ 157#define WDC_CAPABILITY_DATA32 0x0002 /* can do 32-bit data access */ 158#define WDC_CAPABILITY_MODE 0x0004 /* controller knows its PIO/DMA modes */ 159#define WDC_CAPABILITY_DMA 0x0008 /* DMA */ 160#define WDC_CAPABILITY_UDMA 0x0010 /* Ultra-DMA/33 */ 161#define WDC_CAPABILITY_NO_EXTRA_RESETS 0x0100 /* only reset once */ 162#define WDC_CAPABILITY_PREATA 0x0200 /* ctrl can be a pre-ata one */ 163#define WDC_CAPABILITY_IRQACK 0x0400 /* callback to ack interrupt */ 164#define WDC_CAPABILITY_SINGLE_DRIVE 0x800 /* Don't proble second drive */ 165#define WDC_CAPABILITY_NO_ATAPI_DMA 0x1000 /* Don't do DMA with ATAPI */ 166#define WDC_CAPABILITY_SATA 0x2000 /* SATA controller */ 167 u_int8_t PIO_cap; /* highest PIO mode supported */ 168 u_int8_t DMA_cap; /* highest DMA mode supported */ 169 u_int8_t UDMA_cap; /* highest UDMA mode supported */ 170 int nchannels; /* Number of channels on this controller */ 171 struct channel_softc **channels; /* channels-specific datas (array) */ 172 u_int16_t quirks; /* per-device oddities */ 173#define WDC_QUIRK_NOSHORTDMA 0x0001 /* can't do short DMA transfers */ 174 175#if 0 176 /* 177 * The reference count here is used for both IDE and ATAPI devices. 178 */ 179 struct scsipi_adapter sc_atapi_adapter; 180#endif 181 182 /* if WDC_CAPABILITY_DMA set in 'cap' */ 183 void *dma_arg; 184 int (*dma_init)(void *, int, int, void *, size_t, 185 int); 186 void (*dma_start)(void *, int, int); 187 int (*dma_finish)(void *, int, int, int); 188/* flags passed to DMA functions */ 189#define WDC_DMA_READ 0x01 190#define WDC_DMA_IRQW 0x02 191#define WDC_DMA_LBA48 0x04 192 int dma_status; /* status return from dma_finish() */ 193#define WDC_DMAST_NOIRQ 0x01 /* missing IRQ */ 194#define WDC_DMAST_ERR 0x02 /* DMA error */ 195#define WDC_DMAST_UNDER 0x04 /* DMA underrun */ 196 197 /* if WDC_CAPABILITY_MODE set in 'cap' */ 198 void (*set_modes)(struct channel_softc *); 199 200 /* if WDC_CAPABILITY_IRQACK set in 'cap' */ 201 void (*irqack)(struct channel_softc *); 202 203 void (*reset)(struct channel_softc *); 204 205 /* Driver callback to probe for drives */ 206 void (*drv_probe)(struct channel_softc *); 207}; 208 209 /* 210 * Description of a command to be handled by a controller. 211 * These commands are queued in a list. 212 */ 213struct atapi_return_args; 214 215struct wdc_xfer { 216 volatile u_int c_flags; 217#define C_ATAPI 0x0002 /* xfer is ATAPI request */ 218#define C_TIMEOU 0x0004 /* xfer processing timed out */ 219#define C_NEEDDONE 0x0010 /* need to call upper-level done */ 220#define C_POLL 0x0020 /* cmd is polled */ 221#define C_DMA 0x0040 /* cmd uses DMA */ 222#define C_SENSE 0x0080 /* cmd is a internal command */ 223#define C_MEDIA_ACCESS 0x0100 /* is a media access command */ 224#define C_POLL_MACHINE 0x0200 /* machine has a poll handler */ 225#define C_PRIVATEXFER 0x0400 /* privately managed xfer */ 226 227 /* Informations about our location */ 228 struct channel_softc *chp; 229 u_int8_t drive; 230 231 /* Information about the current transfer */ 232 void *cmd; /* wdc, ata or scsipi command structure */ 233 void *databuf; 234 int c_bcount; /* byte count left */ 235 int c_skip; /* bytes already transferred */ 236 TAILQ_ENTRY(wdc_xfer) c_xferchain; 237 LIST_ENTRY(wdc_xfer) free_list; 238 void (*c_start)(struct channel_softc *, struct wdc_xfer *); 239 int (*c_intr)(struct channel_softc *, struct wdc_xfer *, int); 240 void (*c_kill_xfer)(struct channel_softc *, struct wdc_xfer *); 241 242 /* Used by ATAPISCSI */ 243 volatile int endticks; 244 struct timeout atapi_poll_to; 245 void (*next)(struct channel_softc *, struct wdc_xfer *, int, 246 struct atapi_return_args *); 247 void (*c_done)(struct channel_softc *, struct wdc_xfer *, int, 248 struct atapi_return_args *); 249 250 /* Used for tape devices */ 251 int transfer_len; 252}; 253 254/* 255 * Public functions which can be called by ATA or ATAPI specific parts, 256 * or bus-specific backends. 257 */ 258 259int wdcprobe(struct channel_softc *); 260void wdcattach(struct channel_softc *); 261int wdcdetach(struct channel_softc *, int); 262int wdcintr(void *); 263struct channel_queue *wdc_alloc_queue(void); 264void wdc_free_queue(struct channel_queue *); 265void wdc_exec_xfer(struct channel_softc *, struct wdc_xfer *); 266struct wdc_xfer *wdc_get_xfer(int); /* int = WDC_NOSLEEP/CANSLEEP */ 267#define WDC_CANSLEEP 0x00 268#define WDC_NOSLEEP 0x01 269void wdc_free_xfer(struct channel_softc *, struct wdc_xfer *); 270void wdcstart(struct channel_softc *); 271int wdcreset(struct channel_softc *, int); 272#define NOWAIT 0x02 273#define VERBOSE 0x01 274#define SILENT 0x00 /* wdcreset will not print errors */ 275int wdc_wait_for_status(struct channel_softc *, int, int, int); 276int wdc_dmawait(struct channel_softc *, struct wdc_xfer *, int); 277void wdcbit_bucket(struct channel_softc *, int); 278 279void wdccommand(struct channel_softc *, u_int8_t, u_int8_t, u_int16_t, 280 u_int8_t, u_int8_t, u_int8_t, u_int8_t); 281void wdccommandext(struct channel_softc *, u_int8_t, u_int8_t, u_int64_t, 282 u_int16_t); 283void wdccommandshort(struct channel_softc *, int, int); 284void wdctimeout(void *arg); 285void wdc_do_reset(struct channel_softc *); 286 287int wdc_addref(struct channel_softc *); 288void wdc_delref(struct channel_softc *); 289 290/* 291 * ST506 spec says that if READY or SEEKCMPLT go off, then the read or write 292 * command is aborted. 293 */ 294#define wdcwait(chp, status, mask, timeout) ((wdc_wait_for_status((chp), (status), (mask), (timeout)) >= 0) ? 0 : -1) 295#define wait_for_drq(chp, timeout) wdcwait((chp), WDCS_DRQ, WDCS_DRQ, (timeout)) 296#define wait_for_unbusy(chp, timeout) wdcwait((chp), 0, 0, (timeout)) 297#define wait_for_ready(chp, timeout) wdcwait((chp), WDCS_DRDY, \ 298 WDCS_DRDY, (timeout)) 299 300/* ATA/ATAPI specs says a device can take 31s to reset */ 301#define WDC_RESET_WAIT 31000 302 303void wdc_disable_intr(struct channel_softc *); 304void wdc_enable_intr(struct channel_softc *); 305int wdc_select_drive(struct channel_softc *, int, int); 306void wdc_set_drive(struct channel_softc *, int drive); 307void wdc_output_bytes(struct ata_drive_datas *drvp, void *, unsigned int); 308void wdc_input_bytes(struct ata_drive_datas *drvp, void *, unsigned int); 309 310void wdc_print_current_modes(struct channel_softc *); 311 312int wdc_ioctl(struct ata_drive_datas *, u_long, caddr_t, int, struct proc *); 313 314u_int8_t wdc_default_read_reg(struct channel_softc *, 315 enum wdc_regs); 316void wdc_default_write_reg(struct channel_softc *, 317 enum wdc_regs, u_int8_t); 318void wdc_default_lba48_write_reg(struct channel_softc *, 319 enum wdc_regs, u_int16_t); 320void wdc_default_read_raw_multi_2(struct channel_softc *, 321 void *, unsigned int); 322void wdc_default_write_raw_multi_2(struct channel_softc *, 323 void *, unsigned int); 324void wdc_default_read_raw_multi_4(struct channel_softc *, 325 void *, unsigned int); 326void wdc_default_write_raw_multi_4(struct channel_softc *, 327 void *, unsigned int); 328 329#endif /* !_DEV_IC_WDCVAR_H_ */ 330