atavar.h revision 1.2
1 /* $NetBSD: atavar.h,v 1.2 1998/10/12 16:09:15 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 /* Hight-level functions and structures used by both ATA and ATAPI devices */ 37 38 /* Datas common to drives and controller drivers */ 39 struct ata_drive_datas { 40 u_int8_t drive; /* drive number */ 41 u_int8_t drive_flags; /* bitmask for drives present/absent and cap */ 42 #define DRIVE_ATA 0x01 43 #define DRIVE_ATAPI 0x02 44 #define DRIVE (DRIVE_ATA|DRIVE_ATAPI) 45 #define DRIVE_CAP32 0x04 46 #define DRIVE_DMA 0x08 47 #define DRIVE_UDMA 0x10 48 /* 49 * Current setting of drive's PIO, DMA and UDMA modes. 50 * Is initialised by the disks drivers at attach time, and may be 51 * changed later by the controller's code if needed 52 */ 53 u_int8_t PIO_mode; /* Current setting of drive's PIO mode */ 54 u_int8_t DMA_mode; /* Current setting of drive's DMA mode */ 55 u_int8_t UDMA_mode; /* Current setting of drive's UDMA mode */ 56 /* 57 * Drive state. This is drive-type (ATA or ATAPI) dependant 58 * This is reset to 0 after a channel reset. 59 */ 60 u_int8_t state; 61 62 struct device *drv_softc; /* ATA drives softc, if any */ 63 void* chnl_softc; /* channel softc */ 64 }; 65 66 /* ATA/ATAPI common attachement datas */ 67 struct ata_atapi_attach { 68 u_int8_t aa_type; /* Type of device */ 69 #define T_ATA 0 70 #define T_ATAPI 1 71 u_int8_t aa_channel; /* controller's channel */ 72 u_int8_t aa_openings; /* Number of simultaneous commands possible */ 73 struct ata_drive_datas *aa_drv_data; 74 void *aa_bus_private; /* infos specifics to this bus */ 75 }; 76 77 78 79 80 /* 81 * ATA/ATAPI commands description 82 * 83 * This structure defines the interface between the ATA/ATAPI device driver 84 * and the controller for short commands. It contains the command's parameter, 85 * the len of data's to read/write (if any), and a function to call upon 86 * completion. 87 * If no sleep is allowed, the driver can poll for command completion. 88 * Once the command completed, if the error registed is valid, the flag 89 * AT_ERROR is set and the error register value is copied to r_error . 90 * A separate interface is needed for read/write or ATAPI packet commands 91 * (which need multiple interrupts per commands). 92 */ 93 struct wdc_command { 94 u_int8_t r_command; /* Parameters to upload to registers */ 95 u_int8_t r_head; 96 u_int16_t r_cyl; 97 u_int8_t r_sector; 98 u_int8_t r_count; 99 u_int8_t r_precomp; 100 u_int8_t r_st_bmask; /* status register mask to wait for before command */ 101 u_int8_t r_st_pmask; /* status register mask to wait for after command */ 102 u_int8_t r_error; /* error register after command done */ 103 volatile u_int16_t flags; 104 #define AT_READ 0x0001 /* There is data to read */ 105 #define AT_WRITE 0x0002 /* There is data to write (excl. with AT_READ) */ 106 #define AT_WAIT 0x0008 /* wait in controller code for command completion */ 107 #define AT_POLL 0x0010 /* poll for command completion (no interrupts) */ 108 #define AT_DONE 0x0020 /* command is done */ 109 #define AT_ERROR 0x0040 /* command is done with error */ 110 #define AT_TIMEOU 0x0040 /* command timed out */ 111 #define AT_DF 0x0080 /* Drive fault */ 112 int timeout; /* timeout (in ms) */ 113 void *data; /* Data buffer address */ 114 int bcount; /* number of bytes to transfer */ 115 void (*callback) __P((void*)); /* command to call once command completed */ 116 void *callback_arg; /* argument passed to *callback() */ 117 }; 118 119 int wdc_exec_command __P((struct ata_drive_datas *, struct wdc_command*)); 120 #define WDC_COMPLETE 0x01 121 #define WDC_QUEUED 0x02 122 #define WDC_TRY_AGAIN 0x03 123 124 void wdc_probe_caps __P((struct ata_drive_datas*)); 125 126 void wdc_reset_channel __P((struct ata_drive_datas *)); 127 128 struct ataparams; 129 int ata_get_params __P((struct ata_drive_datas*, u_int8_t, 130 struct ataparams *)); 131 int ata_set_mode __P((struct ata_drive_datas*, u_int8_t, u_int8_t)); 132 /* return code for these cmds */ 133 #define CMD_OK 0 134 #define CMD_ERR 1 135 #define CMD_AGAIN 2 136
Indexes created Sun Sep 28 12:09:53 GMT 2025