/* $NetBSD: atavar.h,v 1.15 2000/01/17 00:01:00 bouyer Exp $ */ /* * Copyright (c) 1998 Manuel Bouyer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ /* Hight-level functions and structures used by both ATA and ATAPI devices */ /* Datas common to drives and controller drivers */ struct ata_drive_datas { u_int8_t drive; /* drive number */ int8_t ata_vers; /* ATA version supported */ u_int16_t drive_flags; /* bitmask for drives present/absent and cap */ #define DRIVE_ATA 0x0001 #define DRIVE_ATAPI 0x0002 #define DRIVE_OLD 0x0004 #define DRIVE (DRIVE_ATA|DRIVE_ATAPI|DRIVE_OLD) #define DRIVE_CAP32 0x0008 #define DRIVE_DMA 0x0010 #define DRIVE_UDMA 0x0020 #define DRIVE_MODE 0x0040 /* the drive reported its mode */ #define DRIVE_RESET 0x0080 /* reset the drive state at next xfer */ #define DRIVE_DMAERR 0x0100 /* Udma transfer had crc error, don't try DMA */ /* * Current setting of drive's PIO, DMA and UDMA modes. * Is initialised by the disks drivers at attach time, and may be * changed later by the controller's code if needed */ u_int8_t PIO_mode; /* Current setting of drive's PIO mode */ u_int8_t DMA_mode; /* Current setting of drive's DMA mode */ u_int8_t UDMA_mode; /* Current setting of drive's UDMA mode */ /* Supported modes for this drive */ u_int8_t PIO_cap; /* supported drive's PIO mode */ u_int8_t DMA_cap; /* supported drive's DMA mode */ u_int8_t UDMA_cap; /* supported drive's UDMA mode */ /* * Drive state. This is drive-type (ATA or ATAPI) dependant * This is reset to 0 after a channel reset. */ u_int8_t state; /* numbers of xfers and DMA errs. Used by ata_dmaerr() */ u_int8_t n_dmaerrs; u_int32_t n_xfers; /* Downgrade after NERRS_MAX errors in at most NXFER xfers */ #define NERRS_MAX 4 #define NXFER 4000 struct device *drv_softc; /* ATA drives softc, if any */ void* chnl_softc; /* channel softc */ }; /* ATA/ATAPI common attachement datas */ struct ata_atapi_attach { u_int8_t aa_type; /* Type of device */ #define T_ATA 0 #define T_ATAPI 1 u_int8_t aa_channel; /* controller's channel */ u_int8_t aa_openings; /* Number of simultaneous commands possible */ struct ata_drive_datas *aa_drv_data; void *aa_bus_private; /* infos specifics to this bus */ }; /* User config flags that force (or disable) the use of a mode */ #define ATA_CONFIG_PIO_MODES 0x0007 #define ATA_CONFIG_PIO_SET 0x0008 #define ATA_CONFIG_PIO_OFF 0 #define ATA_CONFIG_DMA_MODES 0x0070 #define ATA_CONFIG_DMA_SET 0x0080 #define ATA_CONFIG_DMA_DISABLE 0x0070 #define ATA_CONFIG_DMA_OFF 4 #define ATA_CONFIG_UDMA_MODES 0x0700 #define ATA_CONFIG_UDMA_SET 0x0800 #define ATA_CONFIG_UDMA_DISABLE 0x0700 #define ATA_CONFIG_UDMA_OFF 8 /* * ATA/ATAPI commands description * * This structure defines the interface between the ATA/ATAPI device driver * and the controller for short commands. It contains the command's parameter, * the len of data's to read/write (if any), and a function to call upon * completion. * If no sleep is allowed, the driver can poll for command completion. * Once the command completed, if the error registed is valid, the flag * AT_ERROR is set and the error register value is copied to r_error . * A separate interface is needed for read/write or ATAPI packet commands * (which need multiple interrupts per commands). */ struct wdc_command { u_int8_t r_command; /* Parameters to upload to registers */ u_int8_t r_head; u_int16_t r_cyl; u_int8_t r_sector; u_int8_t r_count; u_int8_t r_precomp; u_int8_t r_st_bmask; /* status register mask to wait for before command */ u_int8_t r_st_pmask; /* status register mask to wait for after command */ u_int8_t r_error; /* error register after command done */ volatile u_int16_t flags; #define AT_READ 0x0001 /* There is data to read */ #define AT_WRITE 0x0002 /* There is data to write (excl. with AT_READ) */ #define AT_WAIT 0x0008 /* wait in controller code for command completion */ #define AT_POLL 0x0010 /* poll for command completion (no interrupts) */ #define AT_DONE 0x0020 /* command is done */ #define AT_ERROR 0x0040 /* command is done with error */ #define AT_TIMEOU 0x0080 /* command timed out */ #define AT_DF 0x0100 /* Drive fault */ #define AT_READREG 0x0200 /* Read registers on completion */ int timeout; /* timeout (in ms) */ void *data; /* Data buffer address */ int bcount; /* number of bytes to transfer */ void (*callback) __P((void*)); /* command to call once command completed */ void *callback_arg; /* argument passed to *callback() */ }; int wdc_exec_command __P((struct ata_drive_datas *, struct wdc_command*)); #define WDC_COMPLETE 0x01 #define WDC_QUEUED 0x02 #define WDC_TRY_AGAIN 0x03 void wdc_probe_caps __P((struct ata_drive_datas*)); int wdc_downgrade_mode __P((struct ata_drive_datas*)); void wdc_reset_channel __P((struct ata_drive_datas *)); int wdc_ata_addref __P((struct ata_drive_datas *)); void wdc_ata_delref __P((struct ata_drive_datas *)); void wdc_ata_kill_pending __P((struct ata_drive_datas *)); struct ataparams; int ata_get_params __P((struct ata_drive_datas*, u_int8_t, struct ataparams *)); int ata_set_mode __P((struct ata_drive_datas*, u_int8_t, u_int8_t)); /* return code for these cmds */ #define CMD_OK 0 #define CMD_ERR 1 #define CMD_AGAIN 2 void ata_dmaerr __P((struct ata_drive_datas *)); void ata_perror __P((struct ata_drive_datas *, int, char *));