/*?This?file?contains?the?device?dependent?part?of?a?driver?for?the?IBM-AT
?*?winchester?controller.??Written?by?Adri?Koppes.
?*
?*?The?file?contains?one?entry?point:
?*
?*???at_winchester_task:	main?entry?when?system?is?brought?up
?*
?*?Changes:
?*???Aug?19?2005???ata?pci?support?supports?SATA??（Ben?Gras）
?*???Nov?18?2004???moved?AT?disk?driver?to?user-space??（Jorrit?N.?Herder）
?*???Aug?20?2004???watchdogs?replaced?by?sync?alarms??（Jorrit?N.?Herder）
?*???Mar?23?2000???added?ATAPI?CDROM?support??（Michael?Temari）
?*???May?14?2000???d-d/i?rewrite??（Kees?J.?Bot）
?*???Apr?13?1992???device?dependent/independent?split??（Kees?J.?Bot）
?*/

#include?“at_wini.h“
#include?“../libpci/pci.h“

#include?
#include?
#include?

#define?ATAPI_DEBUG	????0	/*?To?debug?ATAPI?code.?*/

/*?I/O?Ports?used?by?winchester?disk?controllers.?*/

/*?Read?and?write?registers?*/
#define?REG_CMD_base0	0x1F0	/*?command?base?register?of?controller?0?*/
#define?REG_CMD_base1	0x170	/*?command?base?register?of?controller?1?*/
#define?REG_CTL_base0	0x3F6	/*?control?base?register?of?controller?0?*/
#define?REG_CTL_base1	0x376	/*?control?base?register?of?controller?1?*/

#define?REG_DATA	????0	/*?data?register?（offset?from?the?base?reg.）?*/
#define?REG_PRECOMP	????1	/*?start?of?write?precompensation?*/
#define?REG_COUNT	????2	/*?sectors?to?transfer?*/
#define?REG_SECTOR	????3	/*?sector?number?*/
#define?REG_CYL_LO	????4	/*?low?byte?of?cylinder?number?*/
#define?REG_CYL_HI	????5	/*?high?byte?of?cylinder?number?*/
#define?REG_LDH		????6	/*?lba?drive?and?head?*/
#define???LDH_DEFAULT		0xA0	/*?ECC?enable?512?bytes?per?sector?*/
#define???LDH_LBA		0x40	/*?Use?LBA?addressing?*/
#define???ldh_init（drive）	（LDH_DEFAULT?|?（（drive）?<
/*?Read?only?registers?*/
#define?REG_STATUS	????7	/*?status?*/
#define???STATUS_BSY		0x80	/*?controller?busy?*/
#define	??STATUS_RDY		0x40	/*?drive?ready?*/
#define	??STATUS_WF		0x20	/*?write?fault?*/
#define	??STATUS_SC		0x10	/*?seek?complete?（obsolete）?*/
#define	??STATUS_DRQ		0x08	/*?data?transfer?request?*/
#define	??STATUS_CRD		0x04	/*?corrected?data?*/
#define	??STATUS_IDX		0x02	/*?index?pulse?*/
#define	??STATUS_ERR		0x01	/*?error?*/
#define	??STATUS_ADMBSY	???????0x100	/*?administratively?busy?（software）?*/
#define?REG_ERROR	????1	/*?error?code?*/
#define	??ERROR_BB		0x80	/*?bad?block?*/
#define	??ERROR_ECC		0x40	/*?bad?ecc?bytes?*/
#define	??ERROR_ID		0x10	/*?id?not?found?*/
#define	??ERROR_AC		0x04	/*?aborted?command?*/
#define	??ERROR_TK		0x02	/*?track?zero?error?*/
#define	??ERROR_DM		0x01	/*?no?data?address?mark?*/

/*?Write?only?registers?*/
#define?REG_COMMAND	????7	/*?command?*/
#define???CMD_IDLE		0x00	/*?for?w_command:?drive?idle?*/
#define???CMD_RECALIBRATE	0x10	/*?recalibrate?drive?*/
#define???CMD_READ		0x20	/*?read?data?*/
#define???CMD_READ_EXT		0x24	/*?read?data?（LBA48?addressed）?*/
#define???CMD_WRITE		0x30	/*?write?data?*/
#define	??CMD_WRITE_EXT		0x34	/*?write?data?（LBA48?addres