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Diffstat (limited to 'include/ata_drive.h')
| -rw-r--r-- | include/ata_drive.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/include/ata_drive.h b/include/ata_drive.h new file mode 100644 index 0000000000..cdd8049f0d --- /dev/null +++ b/include/ata_drive.h @@ -0,0 +1,100 @@ +/* + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef ATA_DISK_H +# define ATA_DISK + +/* IDE register file */ +#define IDE_REG_DATA 0x00 +#define IDE_REG_ERR 0x01 +#define IDE_REG_NSECT 0x02 +#define IDE_REG_LBAL 0x03 +#define IDE_REG_LBAM 0x04 +#define IDE_REG_LBAH 0x05 +#define IDE_REG_DEVICE 0x06 +#define IDE_REG_STATUS 0x07 + +#define IDE_REG_FEATURE IDE_REG_ERR /* and their aliases */ +#define IDE_REG_CMD IDE_REG_STATUS + +#define IDE_REG_ALT_STATUS 0x00 +#define IDE_REG_DEV_CTL 0x00 +#define IDE_REG_DRV_ADDR 0x01 + +/** addresses of each individual IDE drive register */ +struct ata_ioports { + void __iomem *cmd_addr; + void __iomem *data_addr; + void __iomem *error_addr; + void __iomem *feature_addr; + void __iomem *nsect_addr; + void __iomem *lbal_addr; + void __iomem *lbam_addr; + void __iomem *lbah_addr; + void __iomem *device_addr; + void __iomem *status_addr; + void __iomem *command_addr; + void __iomem *altstatus_addr; + void __iomem *ctl_addr; + void __iomem *alt_dev_addr; + + /* hard reset line handling */ + void (*reset)(int); /* true: assert reset, false: de-assert reset */ + int dataif_be; /* true if 16 bit data register is big endian */ +}; + +struct device_d; +extern int register_ata_drive(struct device_d*, struct ata_ioports*); + +/** + * @file + * @brief Register file examples of generic types of ATA devices + * + * PC IDE: + * + * Offset Read Write Note + *----------------------------------------------------------- + * 0x1f0 data data 16 bit register + * 0x1f1 error feature + * 0x1f2 sec cnt set cnt + * 0x1f3 sec no sec no + * 0x1f4 cyl low cyl low + * 0x1f5 cyl high cyl high + * 0x1f6 head head + * 0x1f7 status command + * 0x3f6 alt status dev cntrl + * 0x3f7 drv addr + * + * PCMCIA memory mapped: + * + * Offset Read Write Note + *----------------------------------------------------------- + * 0x0 data data 16 bit register + * 0x1 error feature + * 0x2 sec cnt set cnt + * 0x3 sec no sec no + * 0x4 cyl low cyl low + * 0x5 cyl high cyl high + * 0x6 head head + * 0x7 status command + * 0x8 data data 16 bit or 8 bit register (even byte) + * 0x9 data data 8 bit register (odd byte) + * 0xd error feature dup of offset 1 + * 0xe alt status dev cntrl + * 0xf drv addr + * 0x400 data data 16 bit area with 1 kiB in size + */ + +#endif /* ATA_DISK */ |