// 16bit code to access floppy drives.
//
-// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "types.h" // u8
#include "disk.h" // DISK_RET_SUCCESS
-#include "config.h" // CONFIG_FLOPPY_SUPPORT
-#include "biosvar.h" // struct bregs
-#include "util.h" // irq_disable
+#include "config.h" // CONFIG_FLOPPY
+#include "biosvar.h" // SET_BDA
+#include "util.h" // wait_irq
#include "cmos.h" // inb_cmos
-#include "pic.h" // unmask_pic1
-
-#define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args)
-#define DEBUGF(fmt, args...)
-
-#define BX_FLOPPY_ON_CNT 37 /* 2 seconds */
+#include "pic.h" // eoi_pic1
+#include "bregs.h" // struct bregs
+#include "boot.h" // boot_add_floppy
+#include "pci.h" // pci_to_bdf
+#include "pci_ids.h" // PCI_CLASS_BRIDGE_ISA
+
+#define FLOPPY_SIZE_CODE 0x02 // 512 byte sectors
+#define FLOPPY_DATALEN 0xff // Not used - because size code is 0x02
+#define FLOPPY_MOTOR_TICKS 37 // ~2 seconds
+#define FLOPPY_FILLBYTE 0xf6
+#define FLOPPY_GAPLEN 0x1B
+#define FLOPPY_FORMAT_GAPLEN 0x6c
// New diskette parameter table adding 3 parameters from IBM
// Since no provisions are made for multiple drive types, most
// values in this table are ignored. I set parameters for 1.44M
// floppy here
-struct floppy_ext_dbt_s diskette_param_table2 VISIBLE16 = {
+struct floppy_ext_dbt_s diskette_param_table2 VAR16VISIBLE = {
.dbt = {
- .specify1 = 0xAF,
- .specify2 = 0x02, // head load time 0000001, DMA used
- .shutoff_ticks = 0x25,
- .bps_code = 0x02,
+ .specify1 = 0xAF, // step rate 12ms, head unload 240ms
+ .specify2 = 0x02, // head load time 4ms, DMA used
+ .shutoff_ticks = FLOPPY_MOTOR_TICKS, // ~2 seconds
+ .bps_code = FLOPPY_SIZE_CODE,
.sectors = 18,
- .interblock_len = 0x1B,
- .data_len = 0xFF,
- .gap_len = 0x6C,
- .fill_byte = 0xF6,
- .settle_time = 0x0F,
- .startup_time = 0x08,
+ .interblock_len = FLOPPY_GAPLEN,
+ .data_len = FLOPPY_DATALEN,
+ .gap_len = FLOPPY_FORMAT_GAPLEN,
+ .fill_byte = FLOPPY_FILLBYTE,
+ .settle_time = 0x0F, // 15ms
+ .startup_time = 0x08, // 1 second
},
.max_track = 79, // maximum track
.data_rate = 0, // data transfer rate
.drive_type = 4, // drive type in cmos
};
+// Since no provisions are made for multiple drive types, most
+// values in this table are ignored. I set parameters for 1.44M
+// floppy here
+struct floppy_dbt_s diskette_param_table VAR16FIXED(0xefc7) = {
+ .specify1 = 0xAF,
+ .specify2 = 0x02,
+ .shutoff_ticks = FLOPPY_MOTOR_TICKS,
+ .bps_code = FLOPPY_SIZE_CODE,
+ .sectors = 18,
+ .interblock_len = FLOPPY_GAPLEN,
+ .data_len = FLOPPY_DATALEN,
+ .gap_len = FLOPPY_FORMAT_GAPLEN,
+ .fill_byte = FLOPPY_FILLBYTE,
+ .settle_time = 0x0F,
+ .startup_time = 0x08,
+};
+
+struct floppyinfo_s {
+ struct chs_s chs;
+ u8 config_data;
+ u8 media_state;
+};
+
+struct floppyinfo_s FloppyInfo[] VAR16VISIBLE = {
+ // Unknown
+ { {0, 0, 0}, 0x00, 0x00},
+ // 1 - 360KB, 5.25" - 2 heads, 40 tracks, 9 sectors
+ { {2, 40, 9}, 0x00, 0x25},
+ // 2 - 1.2MB, 5.25" - 2 heads, 80 tracks, 15 sectors
+ { {2, 80, 15}, 0x00, 0x25},
+ // 3 - 720KB, 3.5" - 2 heads, 80 tracks, 9 sectors
+ { {2, 80, 9}, 0x00, 0x17},
+ // 4 - 1.44MB, 3.5" - 2 heads, 80 tracks, 18 sectors
+ { {2, 80, 18}, 0x00, 0x17},
+ // 5 - 2.88MB, 3.5" - 2 heads, 80 tracks, 36 sectors
+ { {2, 80, 36}, 0xCC, 0xD7},
+ // 6 - 160k, 5.25" - 1 heads, 40 tracks, 8 sectors
+ { {1, 40, 8}, 0x00, 0x27},
+ // 7 - 180k, 5.25" - 1 heads, 40 tracks, 9 sectors
+ { {1, 40, 9}, 0x00, 0x27},
+ // 8 - 320k, 5.25" - 2 heads, 40 tracks, 8 sectors
+ { {2, 40, 8}, 0x00, 0x27},
+};
+
+struct drive_s *
+init_floppy(int floppyid, int ftype)
+{
+ if (ftype <= 0 || ftype >= ARRAY_SIZE(FloppyInfo)) {
+ dprintf(1, "Bad floppy type %d\n", ftype);
+ return NULL;
+ }
+
+ struct drive_s *drive_g = malloc_fseg(sizeof(*drive_g));
+ if (!drive_g) {
+ warn_noalloc();
+ return NULL;
+ }
+ memset(drive_g, 0, sizeof(*drive_g));
+ drive_g->cntl_id = floppyid;
+ drive_g->type = DTYPE_FLOPPY;
+ drive_g->blksize = DISK_SECTOR_SIZE;
+ drive_g->floppy_type = ftype;
+ drive_g->sectors = (u64)-1;
+
+ memcpy(&drive_g->lchs, &FloppyInfo[ftype].chs
+ , sizeof(FloppyInfo[ftype].chs));
+ return drive_g;
+}
+
+static void
+addFloppy(int floppyid, int ftype)
+{
+ struct drive_s *drive_g = init_floppy(floppyid, ftype);
+ if (!drive_g)
+ return;
+ char *desc = znprintf(MAXDESCSIZE, "Floppy [drive %c]", 'A' + floppyid);
+ struct pci_device *pci = pci_find_class(PCI_CLASS_BRIDGE_ISA); /* isa-to-pci bridge */
+ int prio = bootprio_find_fdc_device(pci, PORT_FD_BASE, floppyid);
+ boot_add_floppy(drive_g, desc, prio);
+}
+
void
-floppy_drive_setup()
+floppy_setup(void)
{
- if (! CONFIG_FLOPPY_SUPPORT)
+ if (! CONFIG_FLOPPY)
return;
dprintf(3, "init floppy drives\n");
- u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- u8 out = 0;
- u8 num_floppies = 0;
- if (type & 0xf0) {
- out |= 0x07;
- num_floppies++;
- }
- if (type & 0x0f) {
- out |= 0x70;
- num_floppies++;
+ if (CONFIG_COREBOOT) {
+ // XXX - disable floppies on coreboot for now.
+ } else {
+ u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
+ if (type & 0xf0)
+ addFloppy(0, type >> 4);
+ if (type & 0x0f)
+ addFloppy(1, type & 0x0f);
}
- SET_BDA(floppy_harddisk_info, out);
-
- // Update equipment word bits for floppy
- if (num_floppies == 1)
- // 1 drive, ready for boot
- SETBITS_BDA(equipment_list_flags, 0x01);
- else if (num_floppies == 2)
- // 2 drives, ready for boot
- SETBITS_BDA(equipment_list_flags, 0x41);
outb(0x02, PORT_DMA1_MASK_REG);
- // Enable IRQ6 (handle_0e)
- unmask_pic1(PIC1_IRQ6);
+ enable_hwirq(6, FUNC16(entry_0e));
}
-static inline void
-set_diskette_current_cyl(u8 drive, u8 cyl)
+// Find a floppy type that matches a given image size.
+int
+find_floppy_type(u32 size)
{
- if (drive)
- SET_BDA(floppy_track1, cyl);
- else
- SET_BDA(floppy_track0, cyl);
+ int i;
+ for (i=1; i<ARRAY_SIZE(FloppyInfo); i++) {
+ struct chs_s *c = &FloppyInfo[i].chs;
+ if (c->cylinders * c->heads * c->spt * DISK_SECTOR_SIZE == size)
+ return i;
+ }
+ return -1;
}
-static u16
-get_drive_type(u8 drive)
-{
- // check CMOS to see if drive exists
- u8 drive_type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- if (drive == 0)
- drive_type >>= 4;
- else
- drive_type &= 0x0f;
- return drive_type;
-}
-static u16
-floppy_media_known(u8 drive)
-{
- if (!(GET_BDA(floppy_recalibration_status) & (1<<drive)))
- return 0;
- u8 v = GET_BDA(floppy_media_state[drive]);
- if (!(v & FMS_MEDIA_DRIVE_ESTABLISHED))
- return 0;
- return 1;
-}
+/****************************************************************
+ * Low-level floppy IO
+ ****************************************************************/
static void
-floppy_reset_controller()
+floppy_reset_controller(void)
{
// Reset controller
u8 val8 = inb(PORT_FD_DOR);
;
}
+static int
+wait_floppy_irq(void)
+{
+ ASSERT16();
+ u8 v;
+ for (;;) {
+ if (!GET_BDA(floppy_motor_counter))
+ return -1;
+ v = GET_BDA(floppy_recalibration_status);
+ if (v & FRS_TIMEOUT)
+ break;
+ // Could use wait_irq() here, but that causes issues on
+ // bochs, so use yield() instead.
+ yield();
+ }
+
+ v &= ~FRS_TIMEOUT;
+ SET_BDA(floppy_recalibration_status, v);
+ return 0;
+}
+
static void
-floppy_prepare_controller(u8 drive)
+floppy_prepare_controller(u8 floppyid)
{
CLEARBITS_BDA(floppy_recalibration_status, FRS_TIMEOUT);
// turn on motor of selected drive, DMA & int enabled, normal operation
u8 prev_reset = inb(PORT_FD_DOR) & 0x04;
u8 dor = 0x10;
- if (drive)
+ if (floppyid)
dor = 0x20;
dor |= 0x0c;
- dor |= drive;
+ dor |= floppyid;
outb(dor, PORT_FD_DOR);
// reset the disk motor timeout value of INT 08
- SET_BDA(floppy_motor_counter, BX_FLOPPY_ON_CNT);
+ SET_BDA(floppy_motor_counter, FLOPPY_MOTOR_TICKS);
// wait for drive readiness
while ((inb(PORT_FD_STATUS) & 0xc0) != 0x80)
;
- if (prev_reset == 0) {
- irq_enable();
- u8 v;
- for (;;) {
- v = GET_BDA(floppy_recalibration_status);
- if (v & FRS_TIMEOUT)
- break;
- cpu_relax();
- }
- irq_disable();
-
- v &= ~FRS_TIMEOUT;
- SET_BDA(floppy_recalibration_status, v);
- }
+ if (!prev_reset)
+ wait_floppy_irq();
}
-static u8
+static int
floppy_pio(u8 *cmd, u8 cmdlen)
{
floppy_prepare_controller(cmd[1] & 1);
for (i=0; i<cmdlen; i++)
outb(cmd[i], PORT_FD_DATA);
- irq_enable();
- u8 v;
- for (;;) {
- if (!GET_BDA(floppy_motor_counter)) {
- irq_disable();
- floppy_reset_controller();
- return DISK_RET_ETIMEOUT;
- }
- v = GET_BDA(floppy_recalibration_status);
- if (v & FRS_TIMEOUT)
- break;
- cpu_relax();
+ int ret = wait_floppy_irq();
+ if (ret) {
+ floppy_reset_controller();
+ return -1;
}
- irq_disable();
-
- v &= ~FRS_TIMEOUT;
- SET_BDA(floppy_recalibration_status, v);
return 0;
}
-static u8
-floppy_cmd(struct bregs *regs, u16 count, u8 *cmd, u8 cmdlen)
+static int
+floppy_cmd(struct disk_op_s *op, u16 count, u8 *cmd, u8 cmdlen)
{
// es:bx = pointer to where to place information from diskette
- // port 04: DMA-1 base and current address, channel 2
- // port 05: DMA-1 base and current count, channel 2
- u16 page = regs->es >> 12; // upper 4 bits
- u16 base_es = regs->es << 4; // lower 16bits contributed by ES
- u16 base_address = base_es + regs->bx; // lower 16 bits of address
- // contributed by ES:BX
- if (base_address < base_es)
- // in case of carry, adjust page by 1
- page++;
+ u32 addr = (u32)op->buf_fl;
// check for 64K boundary overrun
- u16 last_addr = base_address + count;
- if (last_addr < base_address)
+ u16 end = count - 1;
+ u32 last_addr = addr + end;
+ if ((addr >> 16) != (last_addr >> 16))
return DISK_RET_EBOUNDARY;
u8 mode_register = 0x4a; // single mode, increment, autoinit disable,
//DEBUGF("floppy dma c2\n");
outb(0x06, PORT_DMA1_MASK_REG);
outb(0x00, PORT_DMA1_CLEAR_FF_REG); // clear flip-flop
- outb(base_address, PORT_DMA_ADDR_2);
- outb(base_address>>8, PORT_DMA_ADDR_2);
+ outb(addr, PORT_DMA_ADDR_2);
+ outb(addr>>8, PORT_DMA_ADDR_2);
outb(0x00, PORT_DMA1_CLEAR_FF_REG); // clear flip-flop
- outb(count, PORT_DMA_CNT_2);
- outb(count>>8, PORT_DMA_CNT_2);
+ outb(end, PORT_DMA_CNT_2);
+ outb(end>>8, PORT_DMA_CNT_2);
// port 0b: DMA-1 Mode Register
// transfer type=write, channel 2
outb(mode_register, PORT_DMA1_MODE_REG);
// port 81: DMA-1 Page Register, channel 2
- outb(page, PORT_DMA_PAGE_2);
+ outb(addr>>16, PORT_DMA_PAGE_2);
outb(0x02, PORT_DMA1_MASK_REG); // unmask channel 2
- u8 ret = floppy_pio(cmd, cmdlen);
+ int ret = floppy_pio(cmd, cmdlen);
if (ret)
- return ret;
+ return DISK_RET_ETIMEOUT;
// check port 3f4 for accessibility to status bytes
if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0)
- BX_PANIC("int13_diskette: ctrl not ready\n");
+ return DISK_RET_ECONTROLLER;
// read 7 return status bytes from controller
u8 i;
SET_BDA(floppy_return_status[i], v);
}
- return 0;
+ return DISK_RET_SUCCESS;
+}
+
+
+/****************************************************************
+ * Floppy media sense
+ ****************************************************************/
+
+static inline void
+set_diskette_current_cyl(u8 floppyid, u8 cyl)
+{
+ SET_BDA(floppy_track[floppyid], cyl);
}
static void
-floppy_drive_recal(u8 drive)
+floppy_drive_recal(u8 floppyid)
{
// send Recalibrate command (2 bytes) to controller
u8 data[12];
data[0] = 0x07; // 07: Recalibrate
- data[1] = drive; // 0=drive0, 1=drive1
+ data[1] = floppyid; // 0=drive0, 1=drive1
floppy_pio(data, 2);
- SETBITS_BDA(floppy_recalibration_status, 1<<drive);
- set_diskette_current_cyl(drive, 0);
+ SETBITS_BDA(floppy_recalibration_status, 1<<floppyid);
+ set_diskette_current_cyl(floppyid, 0);
}
-static u16
-floppy_media_sense(u8 drive)
+static int
+floppy_media_sense(struct drive_s *drive_g)
{
- u16 rv;
- u8 config_data, media_state;
-
- floppy_drive_recal(drive);
-
// for now cheat and get drive type from CMOS,
// assume media is same as drive type
// 110 reserved
// 111 all other formats/drives
- switch (get_drive_type(drive)) {
- case 1:
- // 360K 5.25" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x25; // 0010 0101
- rv = 1;
- break;
- case 2:
- // 1.2 MB 5.25" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x25; // 0010 0101 // need double stepping??? (bit 5)
- rv = 1;
- break;
- case 3:
- // 720K 3.5" drive
- config_data = 0x00; // 0000 0000 ???
- media_state = 0x17; // 0001 0111
- rv = 1;
- break;
- case 4:
- // 1.44 MB 3.5" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x17; // 0001 0111
- rv = 1;
- break;
- case 5:
- // 2.88 MB 3.5" drive
- config_data = 0xCC; // 1100 1100
- media_state = 0xD7; // 1101 0111
- rv = 1;
- break;
- //
- // Extended floppy size uses special cmos setting
- case 6:
- // 160k 5.25" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x27; // 0010 0111
- rv = 1;
- break;
- case 7:
- // 180k 5.25" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x27; // 0010 0111
- rv = 1;
- break;
- case 8:
- // 320k 5.25" drive
- config_data = 0x00; // 0000 0000
- media_state = 0x27; // 0010 0111
- rv = 1;
- break;
- default:
- // not recognized
- config_data = 0x00; // 0000 0000
- media_state = 0x00; // 0000 0000
- rv = 0;
- }
-
- SET_BDA(floppy_last_data_rate, config_data);
- SET_BDA(floppy_media_state[drive], media_state);
- return rv;
+ u8 ftype = GET_GLOBAL(drive_g->floppy_type);
+ SET_BDA(floppy_last_data_rate, GET_GLOBAL(FloppyInfo[ftype].config_data));
+ u8 floppyid = GET_GLOBAL(drive_g->cntl_id);
+ SET_BDA(floppy_media_state[floppyid]
+ , GET_GLOBAL(FloppyInfo[ftype].media_state));
+ return DISK_RET_SUCCESS;
}
-#define floppy_ret(regs, code) \
- __floppy_ret(__func__, (regs), (code))
-
-void
-__floppy_ret(const char *fname, struct bregs *regs, u8 code)
+static int
+check_recal_drive(struct drive_s *drive_g)
{
- SET_BDA(floppy_last_status, code);
- if (code)
- __set_code_fail(fname, regs, code);
- else
- set_code_success(regs);
-}
+ u8 floppyid = GET_GLOBAL(drive_g->cntl_id);
+ if ((GET_BDA(floppy_recalibration_status) & (1<<floppyid))
+ && (GET_BDA(floppy_media_state[floppyid]) & FMS_MEDIA_DRIVE_ESTABLISHED))
+ // Media is known.
+ return DISK_RET_SUCCESS;
-static inline void
-floppy_fail(struct bregs *regs, u8 code)
-{
- floppy_ret(regs, code);
- regs->al = 0; // no sectors read
+ // Recalibrate drive.
+ floppy_drive_recal(floppyid);
+
+ // Sense media.
+ return floppy_media_sense(drive_g);
}
-static u16
-check_drive(struct bregs *regs, u8 drive)
-{
- // see if drive exists
- if (drive > 1 || !get_drive_type(drive)) {
- // XXX - return type doesn't match
- floppy_fail(regs, DISK_RET_ETIMEOUT);
- return 1;
- }
- // see if media in drive, and type is known
- if (floppy_media_known(drive) == 0 && floppy_media_sense(drive) == 0) {
- floppy_fail(regs, DISK_RET_EMEDIA);
- return 1;
- }
- return 0;
-}
+/****************************************************************
+ * Floppy handlers
+ ****************************************************************/
-// diskette controller reset
static void
-floppy_1300(struct bregs *regs, u8 drive)
+lba2chs(struct disk_op_s *op, u8 *track, u8 *sector, u8 *head)
{
- if (drive > 1) {
- floppy_ret(regs, DISK_RET_EPARAM);
- return;
- }
- if (!get_drive_type(drive)) {
- floppy_ret(regs, DISK_RET_ETIMEOUT);
- return;
- }
- set_diskette_current_cyl(drive, 0); // current cylinder
- floppy_ret(regs, DISK_RET_SUCCESS);
+ u32 lba = op->lba;
+
+ u32 tmp = lba + 1;
+ u16 nlspt = GET_GLOBAL(op->drive_g->lchs.spt);
+ *sector = tmp % nlspt;
+
+ tmp /= nlspt;
+ u16 nlh = GET_GLOBAL(op->drive_g->lchs.heads);
+ *head = tmp % nlh;
+
+ tmp /= nlh;
+ *track = tmp;
}
-// Read Diskette Status
-static void
-floppy_1301(struct bregs *regs, u8 drive)
+// diskette controller reset
+static int
+floppy_reset(struct disk_op_s *op)
{
- u8 v = GET_BDA(floppy_last_status);
- regs->ah = v;
- set_cf(regs, v);
+ u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
+ set_diskette_current_cyl(floppyid, 0); // current cylinder
+ return DISK_RET_SUCCESS;
}
// Read Diskette Sectors
-static void
-floppy_1302(struct bregs *regs, u8 drive)
+static int
+floppy_read(struct disk_op_s *op)
{
- if (check_drive(regs, drive))
- return;
-
- u8 num_sectors = regs->al;
- u8 track = regs->ch;
- u8 sector = regs->cl;
- u8 head = regs->dh;
+ int res = check_recal_drive(op->drive_g);
+ if (res)
+ goto fail;
- if (head > 1 || sector == 0 || num_sectors == 0
- || track > 79 || num_sectors > 72) {
- floppy_fail(regs, DISK_RET_EPARAM);
- return;
- }
+ u8 track, sector, head;
+ lba2chs(op, &track, §or, &head);
// send read-normal-data command (9 bytes) to controller
+ u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
u8 data[12];
data[0] = 0xe6; // e6: read normal data
- data[1] = (head << 2) | drive; // HD DR1 DR2
+ data[1] = (head << 2) | floppyid; // HD DR1 DR2
data[2] = track;
data[3] = head;
data[4] = sector;
- data[5] = 2; // 512 byte sector size
- data[6] = sector + num_sectors - 1; // last sector to read on track
- data[7] = 0; // Gap length
- data[8] = 0xff; // Gap length
+ data[5] = FLOPPY_SIZE_CODE;
+ data[6] = sector + op->count - 1; // last sector to read on track
+ data[7] = FLOPPY_GAPLEN;
+ data[8] = FLOPPY_DATALEN;
- u16 ret = floppy_cmd(regs, (num_sectors * 512) - 1, data, 9);
- if (ret) {
- floppy_fail(regs, ret);
- return;
- }
+ res = floppy_cmd(op, op->count * DISK_SECTOR_SIZE, data, 9);
+ if (res)
+ goto fail;
if (data[0] & 0xc0) {
- floppy_fail(regs, DISK_RET_ECONTROLLER);
- return;
+ res = DISK_RET_ECONTROLLER;
+ goto fail;
}
// ??? should track be new val from return_status[3] ?
- set_diskette_current_cyl(drive, track);
- // AL = number of sectors read (same value as passed)
- floppy_ret(regs, DISK_RET_SUCCESS);
+ set_diskette_current_cyl(floppyid, track);
+ return DISK_RET_SUCCESS;
+fail:
+ op->count = 0; // no sectors read
+ return res;
}
// Write Diskette Sectors
-static void
-floppy_1303(struct bregs *regs, u8 drive)
+static int
+floppy_write(struct disk_op_s *op)
{
- if (check_drive(regs, drive))
- return;
+ int res = check_recal_drive(op->drive_g);
+ if (res)
+ goto fail;
- u8 num_sectors = regs->al;
- u8 track = regs->ch;
- u8 sector = regs->cl;
- u8 head = regs->dh;
-
- if (head > 1 || sector == 0 || num_sectors == 0
- || track > 79 || num_sectors > 72) {
- floppy_fail(regs, DISK_RET_EPARAM);
- return;
- }
+ u8 track, sector, head;
+ lba2chs(op, &track, §or, &head);
// send write-normal-data command (9 bytes) to controller
+ u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
u8 data[12];
data[0] = 0xc5; // c5: write normal data
- data[1] = (head << 2) | drive; // HD DR1 DR2
+ data[1] = (head << 2) | floppyid; // HD DR1 DR2
data[2] = track;
data[3] = head;
data[4] = sector;
- data[5] = 2; // 512 byte sector size
- data[6] = sector + num_sectors - 1; // last sector to write on track
- data[7] = 0; // Gap length
- data[8] = 0xff; // Gap length
+ data[5] = FLOPPY_SIZE_CODE;
+ data[6] = sector + op->count - 1; // last sector to write on track
+ data[7] = FLOPPY_GAPLEN;
+ data[8] = FLOPPY_DATALEN;
- u8 ret = floppy_cmd(regs, (num_sectors * 512) - 1, data, 9);
- if (ret) {
- floppy_fail(regs, ret);
- return;
- }
+ res = floppy_cmd(op, op->count * DISK_SECTOR_SIZE, data, 9);
+ if (res)
+ goto fail;
if (data[0] & 0xc0) {
- if (data[1] & 0x02) {
- set_fail(regs);
- regs->ax = 0x0300;
- return;
- }
- BX_PANIC("int13_diskette_function: read error\n");
+ if (data[1] & 0x02)
+ res = DISK_RET_EWRITEPROTECT;
+ else
+ res = DISK_RET_ECONTROLLER;
+ goto fail;
}
// ??? should track be new val from return_status[3] ?
- set_diskette_current_cyl(drive, track);
- // AL = number of sectors read (same value as passed)
- floppy_ret(regs, DISK_RET_SUCCESS);
+ set_diskette_current_cyl(floppyid, track);
+ return DISK_RET_SUCCESS;
+fail:
+ op->count = 0; // no sectors read
+ return res;
}
// Verify Diskette Sectors
-static void
-floppy_1304(struct bregs *regs, u8 drive)
+static int
+floppy_verify(struct disk_op_s *op)
{
- if (check_drive(regs, drive))
- return;
-
- u8 num_sectors = regs->al;
- u8 track = regs->ch;
- u8 sector = regs->cl;
- u8 head = regs->dh;
+ int res = check_recal_drive(op->drive_g);
+ if (res)
+ goto fail;
- if (head > 1 || sector == 0 || num_sectors == 0
- || track > 79 || num_sectors > 72) {
- floppy_fail(regs, DISK_RET_EPARAM);
- return;
- }
+ u8 track, sector, head;
+ lba2chs(op, &track, §or, &head);
// ??? should track be new val from return_status[3] ?
- set_diskette_current_cyl(drive, track);
- // AL = number of sectors verified (same value as passed)
- floppy_ret(regs, DISK_RET_SUCCESS);
+ u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
+ set_diskette_current_cyl(floppyid, track);
+ return DISK_RET_SUCCESS;
+fail:
+ op->count = 0; // no sectors read
+ return res;
}
// format diskette track
-static void
-floppy_1305(struct bregs *regs, u8 drive)
+static int
+floppy_format(struct disk_op_s *op)
{
- DEBUGF("floppy f05\n");
-
- if (check_drive(regs, drive))
- return;
-
- u8 num_sectors = regs->al;
- u8 head = regs->dh;
+ int ret = check_recal_drive(op->drive_g);
+ if (ret)
+ return ret;
- if (head > 1 || num_sectors == 0 || num_sectors > 18) {
- floppy_fail(regs, DISK_RET_EPARAM);
- return;
- }
+ u8 head = op->lba;
// send format-track command (6 bytes) to controller
+ u8 floppyid = GET_GLOBAL(op->drive_g->cntl_id);
u8 data[12];
data[0] = 0x4d; // 4d: format track
- data[1] = (head << 2) | drive; // HD DR1 DR2
- data[2] = 2; // 512 byte sector size
- data[3] = num_sectors; // number of sectors per track
- data[4] = 0; // Gap length
- data[5] = 0xf6; // Fill byte
+ data[1] = (head << 2) | floppyid; // HD DR1 DR2
+ data[2] = FLOPPY_SIZE_CODE;
+ data[3] = op->count; // number of sectors per track
+ data[4] = FLOPPY_FORMAT_GAPLEN;
+ data[5] = FLOPPY_FILLBYTE;
- u8 ret = floppy_cmd(regs, (num_sectors * 4) - 1, data, 6);
- if (ret) {
- floppy_fail(regs, ret);
- return;
- }
+ ret = floppy_cmd(op, op->count * 4, data, 6);
+ if (ret)
+ return ret;
if (data[0] & 0xc0) {
- if (data[1] & 0x02) {
- set_fail(regs);
- regs->ax = 0x0300;
- return;
- }
- BX_PANIC("int13_diskette_function: read error\n");
- }
-
- set_diskette_current_cyl(drive, 0);
- floppy_ret(regs, 0);
-}
-
-// read diskette drive parameters
-static void
-floppy_1308(struct bregs *regs, u8 drive)
-{
- DEBUGF("floppy f08\n");
-
- u8 drive_type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- u8 num_floppies = 0;
- if (drive_type & 0xf0)
- num_floppies++;
- if (drive_type & 0x0f)
- num_floppies++;
-
- if (drive > 1) {
- regs->ax = 0;
- regs->bx = 0;
- regs->cx = 0;
- regs->dx = 0;
- regs->es = 0;
- regs->di = 0;
- regs->dl = num_floppies;
- set_success(regs);
- return;
+ if (data[1] & 0x02)
+ return DISK_RET_EWRITEPROTECT;
+ return DISK_RET_ECONTROLLER;
}
- if (drive == 0)
- drive_type >>= 4;
- else
- drive_type &= 0x0f;
-
- regs->bh = 0;
- regs->bl = drive_type;
- regs->ah = 0;
- regs->al = 0;
- regs->dl = num_floppies;
-
- switch (drive_type) {
- case 0: // none
- regs->cx = 0;
- regs->dh = 0; // max head #
- break;
-
- case 1: // 360KB, 5.25"
- regs->cx = 0x2709; // 40 tracks, 9 sectors
- regs->dh = 1; // max head #
- break;
-
- case 2: // 1.2MB, 5.25"
- regs->cx = 0x4f0f; // 80 tracks, 15 sectors
- regs->dh = 1; // max head #
- break;
-
- case 3: // 720KB, 3.5"
- regs->cx = 0x4f09; // 80 tracks, 9 sectors
- regs->dh = 1; // max head #
- break;
-
- case 4: // 1.44MB, 3.5"
- regs->cx = 0x4f12; // 80 tracks, 18 sectors
- regs->dh = 1; // max head #
- break;
-
- case 5: // 2.88MB, 3.5"
- regs->cx = 0x4f24; // 80 tracks, 36 sectors
- regs->dh = 1; // max head #
- break;
-
- case 6: // 160k, 5.25"
- regs->cx = 0x2708; // 40 tracks, 8 sectors
- regs->dh = 0; // max head #
- break;
-
- case 7: // 180k, 5.25"
- regs->cx = 0x2709; // 40 tracks, 9 sectors
- regs->dh = 0; // max head #
- break;
-
- case 8: // 320k, 5.25"
- regs->cx = 0x2708; // 40 tracks, 8 sectors
- regs->dh = 1; // max head #
- break;
-
- default: // ?
- BX_PANIC("floppy: int13: bad floppy type\n");
- }
-
- /* set es & di to point to 11 byte diskette param table in ROM */
- regs->es = SEG_BIOS;
- regs->di = (u32)&diskette_param_table2;
- /* disk status not changed upon success */
+ set_diskette_current_cyl(floppyid, 0);
+ return DISK_RET_SUCCESS;
}
-// read diskette drive type
-static void
-floppy_1315(struct bregs *regs, u8 drive)
+int
+process_floppy_op(struct disk_op_s *op)
{
- DEBUGF("floppy f15\n");
- if (drive > 1) {
- set_fail(regs);
- regs->ah = 0; // only 2 drives supported
- // set_diskette_ret_status here ???
- return;
- }
- u8 drive_type = get_drive_type(drive);
-
- regs->ah = (drive_type != 0);
- set_success(regs);
-}
+ if (!CONFIG_FLOPPY)
+ return 0;
-// get diskette change line status
-static void
-floppy_1316(struct bregs *regs, u8 drive)
-{
- DEBUGF("floppy f16\n");
- if (drive > 1) {
- floppy_ret(regs, DISK_RET_EPARAM);
- return;
+ switch (op->command) {
+ case CMD_RESET:
+ return floppy_reset(op);
+ case CMD_READ:
+ return floppy_read(op);
+ case CMD_WRITE:
+ return floppy_write(op);
+ case CMD_VERIFY:
+ return floppy_verify(op);
+ case CMD_FORMAT:
+ return floppy_format(op);
+ default:
+ op->count = 0;
+ return DISK_RET_EPARAM;
}
- floppy_ret(regs, DISK_RET_ECHANGED);
}
-static void
-floppy_13XX(struct bregs *regs, u8 drive)
-{
- floppy_ret(regs, DISK_RET_EPARAM);
-}
-void
-floppy_13(struct bregs *regs, u8 drive)
-{
- if (! CONFIG_FLOPPY_SUPPORT) {
- // Minimal stubs
- switch (regs->ah) {
- case 0x01: floppy_1301(regs, drive); break;
- default: floppy_13XX(regs, drive); break;
- }
- return;
- }
- switch (regs->ah) {
- case 0x00: floppy_1300(regs, drive); break;
- case 0x01: floppy_1301(regs, drive); break;
- case 0x02: floppy_1302(regs, drive); break;
- case 0x03: floppy_1303(regs, drive); break;
- case 0x04: floppy_1304(regs, drive); break;
- case 0x05: floppy_1305(regs, drive); break;
- case 0x08: floppy_1308(regs, drive); break;
- case 0x15: floppy_1315(regs, drive); break;
- case 0x16: floppy_1316(regs, drive); break;
- default: floppy_13XX(regs, drive); break;
- }
-}
+/****************************************************************
+ * HW irqs
+ ****************************************************************/
// INT 0Eh Diskette Hardware ISR Entry Point
void VISIBLE16
-handle_0e()
+handle_0e(void)
{
debug_isr(DEBUG_ISR_0e);
+ if (! CONFIG_FLOPPY)
+ goto done;
+
if ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0) {
outb(0x08, PORT_FD_DATA); // sense interrupt status
while ((inb(PORT_FD_STATUS) & 0xc0) != 0xc0)
inb(PORT_FD_DATA);
} while ((inb(PORT_FD_STATUS) & 0xc0) == 0xc0);
}
- eoi_pic1();
// diskette interrupt has occurred
SETBITS_BDA(floppy_recalibration_status, FRS_TIMEOUT);
+
+done:
+ eoi_pic1();
}
// Called from int08 handler.
void
-floppy_tick()
+floppy_tick(void)
{
+ if (! CONFIG_FLOPPY)
+ return;
+
// time to turn off drive(s)?
u8 fcount = GET_BDA(floppy_motor_counter);
if (fcount) {
projects / seabios.git / blobdiff