FDC 디바이스 드라이버

플로피 디스크 드라이버를 구현한다. More...

Data Structures
struct	configuration_control_register
struct	datarate_select_register
struct	digital_input_register
struct	digital_output_register
struct	fdc_context
struct	main_status_register
struct	status_register
struct	status_register_b
struct	tape_drive_register

Macros
#define	DIR_OF_DATA(reg)   (MSR(reg)->RQM ? (MSR(reg)->DIO ? READ_REQUIRED : WRITE_REQUIRED) : UNDEFINED)
#define	DOR_ENABLE(single, drv, dma)
#define	DOR_RESET(single)
#define	DSR_RESET(reg)
#define	IN_RESULT_PHASE(reg)   (MSR(reg)->cmd_busy)
#define	IN_SEEK_PORTION(reg)   (MSR(reg)->drive_busy)
#define	LBA_TO_CHS(lba, h, t, s)
	Converting the Logical Block Address to CHS. CHS: Cylinder, Head, Sector. More...
#define	MSR(reg)   ((MSR_t*)(reg))
#define	REG_CCR(base)   ((base) + 0x07)
#define	REG_DIR(base)   ((base) + 0x07)
#define	REG_DOR(base)   ((base) + 0x02)
#define	REG_DSR(base)   ((base) + 0x04)
#define	REG_FIFO(base)   ((base) + 0x05)
#define	REG_MSR(base)   ((base) + 0x04)
#define	REG_SRA(base)   (base)
#define	REG_SRB(base)   ((base) + 0x01)
#define	REG_TDR(base)   ((base) + 0x03)
#define	SELECT_DRATE(reg, rate)
#define	SET_DRATE(reg, drate)   (((CCR_t*)(reg))->drate_sel = (drate))
#define	SRA(reg)   ((SRA_t*)(ret))
#define	SRB(reg)   ((SRB_t*)(reg))
#define	VALIDATE_RESULT(ctx)

Typedefs
typedef struct configuration_control_register	CCR_t
typedef struct digital_input_register	DIR_t
typedef struct digital_output_register	DOR_t
typedef struct datarate_select_register	DSR_t
typedef struct main_status_register	MSR_t
typedef struct status_register	SRA_t
typedef struct status_register_b	SRB_t
typedef struct tape_drive_register	TDR_t

Enumerations
enum	{ FD_SECTOR_PER_TRACK = 18, FD_HEAD = 2, FD_BLKSZ = 512 }
	트랙, 헤드, 블럭크기를 정의한다. More...
enum	base_address { FDC_PRIMARY = 0x3F0, FDC_SECONDARY = 0x370, FDC_BASE_MAX = 0xFFFF }
	플로피 디스크 드라이버 Primary,Secondary 포트 주소 정의 More...
enum	bytes_per_sector { SECTOR_128 = 0, SECTOR_256 = 1, SECTOR_512 = 2, SECTOR_1024 = 3 }
	섹터당 바이트 수를 정의한다 More...
enum	command_set {   CMD_READ_TRACK = 0x02, CMD_SPECIFY = 0x03, CMD_SEND_DRIVE_STATUS = 0x04, CMD_WRITE_DATA = 0x05,   CMD_READ_DATA = 0x06, CMD_RECALIBRATE = 0x07, CMD_SENSE_INTERRUPT = 0x08, CMD_WRITE_DELETED_DATA = 0x09,   CMD_READ_ID = 0x0A, CMD_READ_DELETED_DATA = 0x0C, CMD_FORMAT_TRACK = 0x0D, CMD_DUMPREG = 0x0E,   CMD_SEEK = 0x0F, CMD_VERSION = 0x10, CMD_SCAN_EQUAL = 0x11, CMD_PERPENDICULAR_MODE = 0x12,   CMD_CONFIGURE = 0x13, CMD_LOCK = 0x14, CMD_VERIFY = 0x16, CMD_SCAN_LOW_OR_EQUAL = 0x19,   CMD_SCAN_HIGH_OR_EQUAL = 0x1D, CMD_RELATIVE_SEEK = 0x8F, CMD_EXT_SKIP = 0x20, CMD_EXT_DENSITY = 0x40,   CMD_EXT_MULTITRACK = 0x80 }
enum	data_rates { DRATE_1Mbps = 0x03, DRATE_500Kbps = 0x00, DRATE_300Kbps = 0x01, DRATE_250Kbps = 0x02 }
enum	dir_of_data { UNDEFINED = 0x00, READ_REQUIRED = 0x01, WRITE_REQUIRED = 0x02, MAX_DIR_OF_DATA = 0xFF }
enum	dma_state { DMA = 0x01, NONDMA = 0x00 }
enum	drive_activation_values { DRIVE0 = 0x1C, DRIVE1 = 0x2D, DRIVE2 = 0x4E, DRIVE3 = 0x8F }
enum	drive_letter {   DRIVE_A = 0x00, DRIVE_B = 0x01, DRIVE_C = 0x02, DRIVE_D = 0x03,   DRIVE_MAX = 0xFF }
enum	fdc_dma_dir_t { FDC_DMA_READ = 1, FDC_DMA_WRITE = 2 }
enum	precompensation_delays {   DELAY_DISABLED = 0x07, DELAY_41_67ns = 0x01, DELAY_83_34ns = 0x02, DELAY_125ns = 0x03,   DELAY_166_67ns = 0x04, DELAY_208_33ns = 0x05, DELAY_250ns = 0x06, DELAY_DEFAULT = 0x0 }
enum	symbol { EIS = 0x06, EFIFO = 0x05, POLL = 0x04 }

Functions
int	fdc_init (void)

Detailed Description

플로피 디스크 드라이버를 구현한다.

Author

Sung-jae Park nices.nosp@m.j@ni.nosp@m.cesj..nosp@m.com

Date

2011-8-16

Macro Definition Documentation

#define DIR_OF_DATA

(

reg)

(MSR(reg)->RQM ? (MSR(reg)->DIO ? READ_REQUIRED : WRITE_REQUIRED) : UNDEFINED)

Definition at line 241 of file fdc.h.

#define DOR_ENABLE	(		single,
			drv,
			dma
	)

Value:

do { \
        unsigned char reg; \
	DOR_t *dor = (DOR_t*)® \
        dor->b_reset = 1; \
        dor->drive = (drv); \
        dor->b_dma_gate = (dma); \
        dor->motor = 0x01 << (drv); \
        outb(REG_DOR(fdc_single_ctrl(single)), reg); \
} while (0)

Definition at line 136 of file fdc.h.

#define DOR_RESET

(

single)

Value:

do { \
        unsigned reg; \
	DOR_t *dor = (DOR_t*)® \
        dor->b_reset = 0; \
        dor->drive = 0; \
        dor->b_dma_gate = 0; \
        dor->motor = 0; \
        outb(REG_DOR(fdc_single_ctrl(single)), reg); \
} while (0)

Definition at line 125 of file fdc.h.

#define DSR_RESET

(

reg)

Value:

do { \
	DSR_t *dsr = (DSR_t*)(reg); \
        dsr->sw_reset = 1; \
        dsr->power_down = 1; \
} while (0)

Definition at line 207 of file fdc.h.

#define IN_RESULT_PHASE

(

reg)

(MSR(reg)->cmd_busy)

Definition at line 242 of file fdc.h.

#define IN_SEEK_PORTION

(

reg)

(MSR(reg)->drive_busy)

Definition at line 243 of file fdc.h.

#define LBA_TO_CHS	(		lba,
			h,
			t,
			s
	)

Value:

do { \
        (h) = ((lba) % (FD_SECTOR_PER_TRACK * FD_HEAD)) / FD_SECTOR_PER_TRACK; \
        (t) = (lba) / (FD_SECTOR_PER_TRACK * FD_HEAD); \
        (s) = ((lba) % FD_SECTOR_PER_TRACK) + 1; \
} while (0)

Converting the Logical Block Address to CHS. CHS: Cylinder, Head, Sector.

Definition at line 343 of file fdc.h.

#define MSR

(

reg)

((MSR_t*)(reg))

Definition at line 240 of file fdc.h.

#define REG_CCR

(

base)

((base) + 0x07)

Definition at line 278 of file fdc.h.

#define REG_DIR

(

base)

((base) + 0x07)

Definition at line 252 of file fdc.h.

#define REG_DOR

(

base)

((base) + 0x02)

Definition at line 104 of file fdc.h.

Referenced by fdc_motor_off(), and fdc_motor_on().

#define REG_DSR

(

base)

((base) + 0x04)

Definition at line 156 of file fdc.h.

#define REG_FIFO

(

base)

((base) + 0x05)

Definition at line 245 of file fdc.h.

#define REG_MSR

(

base)

((base) + 0x04)

Definition at line 215 of file fdc.h.

#define REG_SRA

(

base)

(base)

Definition at line 39 of file fdc.h.

#define REG_SRB

(

base)

((base) + 0x01)

Definition at line 77 of file fdc.h.

#define REG_TDR

(

base)

((base) + 0x03)

Definition at line 148 of file fdc.h.

#define SELECT_DRATE	(		reg,
			rate
	)

Value:

do { \
	DSR_t *dsr = (DSR_t*)(reg); \
        dsr->dratesel = rate; \
        switch (dsr->dratesel) { \
        case DRATE_1Mbps: \
                dsr->precomp = DELAY_41_67ns; \
                break; \
        case DRATE_500Kbps: \
                dsr->precomp = DELAY_125ns; \
                break; \
        case DRATE_300Kbps: \
                dsr->precomp = DELAY_125ns; \
                break; \
        case DRATE_250Kbps: \
                dsr->precomp = DELAY_125ns; \
                break; \
        default: \
                 break; \
        } \
} while (0)

Definition at line 184 of file fdc.h.

#define SET_DRATE	(		reg,
			drate
	)		(((CCR_t*)(reg))->drate_sel = (drate))

Definition at line 291 of file fdc.h.

#define SRA

(

reg)

((SRA_t*)(ret))

Definition at line 40 of file fdc.h.

#define SRB

(

reg)

((SRB_t*)(reg))

Definition at line 78 of file fdc.h.

#define VALIDATE_RESULT

(

ctx)

Value:

do { \
        int ret; \
        unsigned char byte; \
        ret = read_byte(ctx, &byte); \
        if (ret < 0 || byte == 0x80) { \
                printf("Failed to read\n"); \
        } \
} while (0)

Definition at line 350 of file fdc.h.

Referenced by fdc_lock(), fdc_read_deleted_sector(), fdc_read_id(), fdc_read_sector(), fdc_read_track(), fdc_seek(), fdc_unlock(), fdc_verify(), fdc_version(), fdc_write_deleted_sector(), and fdc_write_sector().

Typedef Documentation

typedef struct configuration_control_register CCR_t

Definition at line 279 of file fdc.h.

typedef struct digital_input_register DIR_t

Definition at line 253 of file fdc.h.

typedef struct digital_output_register DOR_t

Definition at line 112 of file fdc.h.

typedef struct datarate_select_register DSR_t

Definition at line 175 of file fdc.h.

typedef struct main_status_register MSR_t

Definition at line 231 of file fdc.h.

typedef struct status_register SRA_t

Definition at line 42 of file fdc.h.

typedef struct status_register_b SRB_t

Definition at line 79 of file fdc.h.

typedef struct tape_drive_register TDR_t

Definition at line 149 of file fdc.h.

Enumeration Type Documentation

anonymous enum

트랙, 헤드, 블럭크기를 정의한다.

Enumerator
FD_SECTOR_PER_TRACK	트랙당 섹터 수
FD_HEAD	해드 수
FD_BLKSZ	섹터 크기 (bytes)

Definition at line 14 of file fdc.h.

enum base_address

플로피 디스크 드라이버 Primary,Secondary 포트 주소 정의

Enumerator
FDC_PRIMARY	Primary controller 의 주소
FDC_SECONDARY	Secondary controller 의 주소
FDC_BASE_MAX

Definition at line 24 of file fdc.h.

enum bytes_per_sector

섹터당 바이트 수를 정의한다

Enumerator
SECTOR_128	128 바이트
SECTOR_256	256 바이트
SECTOR_512	512 바이트
SECTOR_1024	1024 바이트

Definition at line 31 of file fdc.h.

enum command_set

Enumerator
CMD_READ_TRACK	IRQ6 발생
CMD_SPECIFY	드라이브 파라미터 설정
CMD_SEND_DRIVE_STATUS
CMD_WRITE_DATA	디스크에 쓰기
CMD_READ_DATA	디스크에서 읽기
CMD_RECALIBRATE	Cylinder 0 으로 이동
CMD_SENSE_INTERRUPT	IRQ6 응답, 마지막 명령 처리 결과
CMD_WRITE_DELETED_DATA
CMD_READ_ID	IRQ6 발생
CMD_READ_DELETED_DATA
CMD_FORMAT_TRACK
CMD_DUMPREG
CMD_SEEK	SEEK
CMD_VERSION	초기화시 한 번만 사용
CMD_SCAN_EQUAL
CMD_PERPENDICULAR_MODE	초기화시 한 번만 사용
CMD_CONFIGURE	Controller 파라미터 설정
CMD_LOCK	Controller 에 설정된 파라미터 reset 방지
CMD_VERIFY
CMD_SCAN_LOW_OR_EQUAL
CMD_SCAN_HIGH_OR_EQUAL
CMD_RELATIVE_SEEK
CMD_EXT_SKIP
CMD_EXT_DENSITY
CMD_EXT_MULTITRACK

Definition at line 298 of file fdc.h.

enum data_rates

Enumerator
DRATE_1Mbps
DRATE_500Kbps
DRATE_300Kbps
DRATE_250Kbps

Definition at line 168 of file fdc.h.

enum dir_of_data

Enumerator
UNDEFINED
READ_REQUIRED
WRITE_REQUIRED
MAX_DIR_OF_DATA

Definition at line 224 of file fdc.h.

enum dma_state

Enumerator
DMA
NONDMA

Definition at line 120 of file fdc.h.

enum drive_activation_values

Enumerator
DRIVE0
DRIVE1
DRIVE2
DRIVE3

Definition at line 105 of file fdc.h.

enum drive_letter

Enumerator
DRIVE_A
DRIVE_B
DRIVE_C
DRIVE_D
DRIVE_MAX

Definition at line 216 of file fdc.h.

enum fdc_dma_dir_t

Enumerator
FDC_DMA_READ
FDC_DMA_WRITE

Definition at line 293 of file fdc.h.

enum precompensation_delays

Enumerator
DELAY_DISABLED
DELAY_41_67ns
DELAY_83_34ns
DELAY_125ns
DELAY_166_67ns
DELAY_208_33ns
DELAY_250ns
DELAY_DEFAULT

Definition at line 157 of file fdc.h.

enum symbol

Enumerator
EIS
EFIFO
POLL

Definition at line 327 of file fdc.h.

Function Documentation

int fdc_init

(

void

)

Definition at line 329 of file fdc.c.

References DEVICE_FDA, EINVAL, fdc_single_init(), NULL, vfs_get_ninfo(), and vfs_new_dev_ninfo().

Referenced by drivers_init().

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