1 /* $OpenBSD: wdcvar.h,v 1.59 2024/06/18 12:37:29 jsg 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 38 struct channel_queue { /* per channel queue (may be shared) */ 39 TAILQ_HEAD(xferhead, wdc_xfer) sc_xfer; 40 }; 41 42 struct channel_softc_vtbl; 43 44 45 #define WDC_OPTION_PROBE_VERBOSE 0x10000 46 47 struct 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 96 enum wdc_regs { 97 wdr_error = _WDC_RDONLY | 1, 98 wdr_features = _WDC_WRONLY | 1, 99 wdr_seccnt = 2, 100 wdr_ireason = 2, 101 wdr_sector = 3, 102 wdr_lba_lo = 3, 103 wdr_cyl_lo = 4, 104 wdr_lba_mi = 4, 105 wdr_cyl_hi = 5, 106 wdr_lba_hi = 5, 107 wdr_sdh = 6, 108 wdr_status = _WDC_RDONLY | 7, 109 wdr_command = _WDC_WRONLY | 7, 110 wdr_altsts = _WDC_RDONLY | _WDC_AUX, 111 wdr_ctlr = _WDC_WRONLY | _WDC_AUX 112 }; 113 114 #define WDC_NREG 8 /* number of command registers */ 115 #define WDC_NSHADOWREG 2 /* number of command "shadow" registers */ 116 117 struct channel_softc_vtbl { 118 u_int8_t (*read_reg)(struct channel_softc *, enum wdc_regs reg); 119 void (*write_reg)(struct channel_softc *, enum wdc_regs reg, 120 u_int8_t var); 121 void (*lba48_write_reg)(struct channel_softc *, enum wdc_regs reg, 122 u_int16_t var); 123 124 void (*read_raw_multi_2)(struct channel_softc *, 125 void *data, unsigned int nbytes); 126 void (*write_raw_multi_2)(struct channel_softc *, 127 void *data, unsigned int nbytes); 128 129 void (*read_raw_multi_4)(struct channel_softc *, 130 void *data, unsigned int nbytes); 131 void (*write_raw_multi_4)(struct channel_softc *, 132 void *data, unsigned int nbytes); 133 }; 134 135 136 #define CHP_READ_REG(chp, a) ((chp)->_vtbl->read_reg)(chp, a) 137 #define CHP_WRITE_REG(chp, a, b) ((chp)->_vtbl->write_reg)(chp, a, b) 138 #define CHP_LBA48_WRITE_REG(chp, a, b) \ 139 ((chp)->_vtbl->lba48_write_reg)(chp, a, b) 140 141 #define CHP_READ_RAW_MULTI_2(chp, a, b) \ 142 ((chp)->_vtbl->read_raw_multi_2)(chp, a, b) 143 #define CHP_WRITE_RAW_MULTI_2(chp, a, b) \ 144 ((chp)->_vtbl->write_raw_multi_2)(chp, a, b) 145 #define CHP_READ_RAW_MULTI_4(chp, a, b) \ 146 ((chp)->_vtbl->read_raw_multi_4)(chp, a, b) 147 #define CHP_WRITE_RAW_MULTI_4(chp, a, b) \ 148 ((chp)->_vtbl->write_raw_multi_4)(chp, a, b) 149 150 struct wdc_softc { /* Per controller state */ 151 struct device sc_dev; 152 /* mandatory fields */ 153 int cap; 154 /* Capabilities supported by the controller */ 155 #define WDC_CAPABILITY_DATA16 0x0001 /* can do 16-bit data access */ 156 #define WDC_CAPABILITY_DATA32 0x0002 /* can do 32-bit data access */ 157 #define WDC_CAPABILITY_MODE 0x0004 /* controller knows its PIO/DMA modes */ 158 #define WDC_CAPABILITY_DMA 0x0008 /* DMA */ 159 #define WDC_CAPABILITY_UDMA 0x0010 /* Ultra-DMA/33 */ 160 #define WDC_CAPABILITY_NO_EXTRA_RESETS 0x0100 /* only reset once */ 161 #define WDC_CAPABILITY_PREATA 0x0200 /* ctrl can be a pre-ata one */ 162 #define WDC_CAPABILITY_IRQACK 0x0400 /* callback to ack interrupt */ 163 #define WDC_CAPABILITY_SINGLE_DRIVE 0x800 /* Don't probe second drive */ 164 #define WDC_CAPABILITY_NO_ATAPI_DMA 0x1000 /* Don't do DMA with ATAPI */ 165 #define WDC_CAPABILITY_SATA 0x2000 /* SATA controller */ 166 u_int8_t PIO_cap; /* highest PIO mode supported */ 167 u_int8_t DMA_cap; /* highest DMA mode supported */ 168 u_int8_t UDMA_cap; /* highest UDMA mode supported */ 169 int nchannels; /* Number of channels on this controller */ 170 struct channel_softc **channels; /* channel-specific data (array) */ 171 u_int16_t quirks; /* per-device oddities */ 172 #define WDC_QUIRK_NOSHORTDMA 0x0001 /* can't do short DMA transfers */ 173 #define WDC_QUIRK_NOATA 0x0002 /* skip attaching ATA disks */ 174 #define WDC_QUIRK_NOATAPI 0x0004 /* skip attaching ATAPI devices */ 175 176 #if 0 177 /* 178 * The reference count here is used for both IDE and ATAPI devices. 179 */ 180 struct scsipi_adapter sc_atapi_adapter; 181 #endif 182 183 /* if WDC_CAPABILITY_DMA set in 'cap' */ 184 void *dma_arg; 185 int (*dma_init)(void *, int, int, void *, size_t, 186 int); 187 void (*dma_start)(void *, int, int); 188 int (*dma_finish)(void *, int, int, int); 189 /* flags passed to DMA functions */ 190 #define WDC_DMA_READ 0x01 191 #define WDC_DMA_IRQW 0x02 192 #define WDC_DMA_LBA48 0x04 193 int dma_status; /* status return from dma_finish() */ 194 #define WDC_DMAST_NOIRQ 0x01 /* missing IRQ */ 195 #define WDC_DMAST_ERR 0x02 /* DMA error */ 196 #define WDC_DMAST_UNDER 0x04 /* DMA underrun */ 197 198 /* if WDC_CAPABILITY_MODE set in 'cap' */ 199 void (*set_modes)(struct channel_softc *); 200 201 /* if WDC_CAPABILITY_IRQACK set in 'cap' */ 202 void (*irqack)(struct channel_softc *); 203 204 void (*reset)(struct channel_softc *); 205 206 /* Driver callback to probe for drives */ 207 void (*drv_probe)(struct channel_softc *); 208 }; 209 210 /* 211 * Description of a command to be handled by a controller. 212 * These commands are queued in a list. 213 */ 214 struct atapi_return_args; 215 216 struct wdc_xfer { 217 volatile u_int c_flags; 218 #define C_ATAPI 0x0002 /* xfer is ATAPI request */ 219 #define C_TIMEOU 0x0004 /* xfer processing timed out */ 220 #define C_NEEDDONE 0x0010 /* need to call upper-level done */ 221 #define C_POLL 0x0020 /* cmd is polled */ 222 #define C_DMA 0x0040 /* cmd uses DMA */ 223 #define C_SENSE 0x0080 /* cmd is a internal command */ 224 #define C_MEDIA_ACCESS 0x0100 /* is a media access command */ 225 #define C_POLL_MACHINE 0x0200 /* machine has a poll handler */ 226 #define C_PRIVATEXFER 0x0400 /* privately managed xfer */ 227 #define C_SCSIXFER 0x0800 /* SCSI managed xfer */ 228 229 /* Information about our location */ 230 struct channel_softc *chp; 231 u_int8_t drive; 232 233 /* Information about the current transfer */ 234 void *cmd; /* wdc, ata or scsipi command structure */ 235 void *databuf; 236 int c_bcount; /* byte count left */ 237 int c_skip; /* bytes already transferred */ 238 TAILQ_ENTRY(wdc_xfer) c_xferchain; 239 LIST_ENTRY(wdc_xfer) free_list; 240 void (*c_start)(struct channel_softc *, struct wdc_xfer *); 241 int (*c_intr)(struct channel_softc *, struct wdc_xfer *, int); 242 void (*c_kill_xfer)(struct channel_softc *, struct wdc_xfer *); 243 244 /* Used by ATAPISCSI */ 245 volatile int endticks; 246 struct timeout atapi_poll_to; 247 void (*next)(struct channel_softc *, struct wdc_xfer *, int, 248 struct atapi_return_args *); 249 void (*c_done)(struct channel_softc *, struct wdc_xfer *, int, 250 struct atapi_return_args *); 251 252 /* Used for tape devices */ 253 int transfer_len; 254 }; 255 256 /* 257 * Public functions which can be called by ATA or ATAPI specific parts, 258 * or bus-specific backends. 259 */ 260 261 int wdcprobe(struct channel_softc *); 262 void wdcattach(struct channel_softc *); 263 int wdcdetach(struct channel_softc *, int); 264 int wdcintr(void *); 265 struct channel_queue *wdc_alloc_queue(void); 266 void wdc_free_queue(struct channel_queue *); 267 void wdc_exec_xfer(struct channel_softc *, struct wdc_xfer *); 268 struct wdc_xfer *wdc_get_xfer(int); /* int = WDC_NOSLEEP/CANSLEEP */ 269 #define WDC_CANSLEEP 0x00 270 #define WDC_NOSLEEP 0x01 271 void wdc_scrub_xfer(struct wdc_xfer *); 272 void wdc_free_xfer(struct channel_softc *, struct wdc_xfer *); 273 void wdcstart(struct channel_softc *); 274 int wdcreset(struct channel_softc *, int); 275 #define NOWAIT 0x02 276 #define VERBOSE 0x01 277 #define SILENT 0x00 /* wdcreset will not print errors */ 278 int wdc_wait_for_status(struct channel_softc *, int, int, int); 279 int wdc_dmawait(struct channel_softc *, struct wdc_xfer *, int); 280 void wdcbit_bucket(struct channel_softc *, int); 281 282 void wdccommand(struct channel_softc *, u_int8_t, u_int8_t, u_int16_t, 283 u_int8_t, u_int8_t, u_int8_t, u_int8_t); 284 void wdccommandext(struct channel_softc *, u_int8_t, u_int8_t, u_int64_t, 285 u_int16_t); 286 void wdccommandshort(struct channel_softc *, int, int); 287 void wdctimeout(void *arg); 288 void wdc_do_reset(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 302 303 void wdc_disable_intr(struct channel_softc *); 304 void wdc_enable_intr(struct channel_softc *); 305 void wdc_set_drive(struct channel_softc *, int drive); 306 void wdc_output_bytes(struct ata_drive_datas *drvp, void *, unsigned int); 307 void wdc_input_bytes(struct ata_drive_datas *drvp, void *, unsigned int); 308 309 void wdc_print_current_modes(struct channel_softc *); 310 311 int wdc_ioctl(struct ata_drive_datas *, u_long, caddr_t, int, struct proc *); 312 313 u_int8_t wdc_default_read_reg(struct channel_softc *, 314 enum wdc_regs); 315 void wdc_default_write_reg(struct channel_softc *, 316 enum wdc_regs, u_int8_t); 317 void wdc_default_lba48_write_reg(struct channel_softc *, 318 enum wdc_regs, u_int16_t); 319 void wdc_default_read_raw_multi_2(struct channel_softc *, 320 void *, unsigned int); 321 void wdc_default_write_raw_multi_2(struct channel_softc *, 322 void *, unsigned int); 323 void wdc_default_read_raw_multi_4(struct channel_softc *, 324 void *, unsigned int); 325 void wdc_default_write_raw_multi_4(struct channel_softc *, 326 void *, unsigned int); 327 328 #endif /* !_DEV_IC_WDCVAR_H_ */ 329