| // Low level ATA disk access |
| // |
| // Copyright (C) 2008 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. |
| |
| #include "ata.h" // ATA_* |
| #include "types.h" // u8 |
| #include "ioport.h" // inb |
| #include "util.h" // BX_INFO |
| #include "cmos.h" // inb_cmos |
| |
| #define TIMEOUT 0 |
| #define BSY 1 |
| #define NOT_BSY 2 |
| #define NOT_BSY_DRQ 3 |
| #define NOT_BSY_NOT_DRQ 4 |
| #define NOT_BSY_RDY 5 |
| |
| #define IDE_TIMEOUT 32000u //32 seconds max for IDE ops |
| |
| #define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args) |
| #define DEBUGF(fmt, args...) |
| |
| // XXX - lots of redundancy in this file. |
| |
| static int |
| await_ide(u8 when_done, u16 base, u16 timeout) |
| { |
| u32 time=0, last=0; |
| // for the times you're supposed to throw one away |
| u16 status = inb(base + ATA_CB_STAT); |
| for (;;) { |
| status = inb(base+ATA_CB_STAT); |
| time++; |
| u8 result; |
| if (when_done == BSY) |
| result = status & ATA_CB_STAT_BSY; |
| else if (when_done == NOT_BSY) |
| result = !(status & ATA_CB_STAT_BSY); |
| else if (when_done == NOT_BSY_DRQ) |
| result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_DRQ); |
| else if (when_done == NOT_BSY_NOT_DRQ) |
| result = !(status & ATA_CB_STAT_BSY) && !(status & ATA_CB_STAT_DRQ); |
| else if (when_done == NOT_BSY_RDY) |
| result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_RDY); |
| else if (when_done == TIMEOUT) |
| result = 0; |
| |
| if (result) |
| return 0; |
| // mod 2048 each 16 ms |
| if (time>>16 != last) { |
| last = time >>16; |
| DEBUGF("await_ide: (TIMEOUT,BSY,!BSY,!BSY_DRQ,!BSY_!DRQ,!BSY_RDY)" |
| " %d time= %d timeout= %d\n" |
| , when_done, time>>11, timeout); |
| } |
| if (status & ATA_CB_STAT_ERR) { |
| DEBUGF("await_ide: ERROR (TIMEOUT,BSY,!BSY,!BSY_DRQ" |
| ",!BSY_!DRQ,!BSY_RDY) %d time= %d timeout= %d\n" |
| , when_done, time>>11, timeout); |
| return -1; |
| } |
| if ((timeout == 0) || ((time>>11) > timeout)) |
| break; |
| } |
| BX_INFO("IDE time out\n"); |
| return -1; |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // ATA/ATAPI driver : software reset |
| // --------------------------------------------------------------------------- |
| // ATA-3 |
| // 8.2.1 Software reset - Device 0 |
| |
| void |
| ata_reset(u16 device) |
| { |
| u16 iobase1, iobase2; |
| u8 channel, slave, sn, sc; |
| u8 type; |
| |
| channel = device / 2; |
| slave = device % 2; |
| |
| iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| // Reset |
| |
| // 8.2.1 (a) -- set SRST in DC |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC); |
| |
| // 8.2.1 (b) -- wait for BSY |
| await_ide(BSY, iobase1, 20); |
| |
| // 8.2.1 (f) -- clear SRST |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC); |
| |
| type=GET_EBDA(ata.devices[device].type); |
| if (type != ATA_TYPE_NONE) { |
| |
| // 8.2.1 (g) -- check for sc==sn==0x01 |
| // select device |
| outb(slave?ATA_CB_DH_DEV1:ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| sc = inb(iobase1+ATA_CB_SC); |
| sn = inb(iobase1+ATA_CB_SN); |
| |
| if ( (sc==0x01) && (sn==0x01) ) { |
| if (type == ATA_TYPE_ATA) //ATA |
| await_ide(NOT_BSY_RDY, iobase1, IDE_TIMEOUT); |
| else //ATAPI |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| } |
| |
| // 8.2.1 (h) -- wait for not BSY |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // ATA/ATAPI driver : execute a data command |
| // --------------------------------------------------------------------------- |
| // returns |
| // 0 : no error |
| // 1 : BUSY bit set |
| // 2 : read error |
| // 3 : expected DRQ=1 |
| // 4 : no sectors left to read/verify |
| // 5 : more sectors to read/verify |
| // 6 : no sectors left to write |
| // 7 : more sectors to write |
| |
| static int |
| send_cmd(struct ata_pio_command *cmd) |
| { |
| u16 biosid = cmd->biosid; |
| u8 channel = biosid / 2; |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| u8 status = inb(iobase1 + ATA_CB_STAT); |
| if (status & ATA_CB_STAT_BSY) |
| return 1; |
| |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC); |
| if (cmd->command & 0x04) { |
| outb(0x00, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count2, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low2, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid2, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high2, iobase1 + ATA_CB_CH); |
| } |
| outb(cmd->feature, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high, iobase1 + ATA_CB_CH); |
| outb(cmd->device, iobase1 + ATA_CB_DH); |
| outb(cmd->command, iobase1 + ATA_CB_CMD); |
| |
| await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT); |
| |
| status = inb(iobase1 + ATA_CB_STAT); |
| if (status & ATA_CB_STAT_ERR) { |
| DEBUGF("send_cmd : read error\n"); |
| return 2; |
| } |
| if (!(status & ATA_CB_STAT_DRQ)) { |
| DEBUGF("send_cmd : DRQ not set (status %02x)\n" |
| , (unsigned) status); |
| return 3; |
| } |
| |
| return 0; |
| } |
| |
| int |
| ata_transfer(struct ata_pio_command *cmd) |
| { |
| DEBUGF("ata_transfer id=%d cmd=%d lba=%d count=%d buf=%p\n" |
| , cmd->biosid, cmd->command |
| , (cmd->lba_high << 16) | (cmd->lba_mid << 8) | cmd->lba_low |
| , cmd->sector_count, cmd->far_buffer); |
| |
| // Reset count of transferred data |
| SET_EBDA(ata.trsfsectors,0); |
| SET_EBDA(ata.trsfbytes,0L); |
| |
| int ret = send_cmd(cmd); |
| if (ret) |
| return ret; |
| |
| u16 biosid = cmd->biosid; |
| u8 channel = biosid / 2; |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| u8 mode = GET_EBDA(ata.devices[biosid].mode); |
| int iswrite = (cmd->command & ~0x40) == ATA_CMD_WRITE_SECTORS; |
| u8 current = 0; |
| u16 count = cmd->sector_count; |
| u8 status; |
| void *far_buffer = cmd->far_buffer; |
| for (;;) { |
| if (iswrite) { |
| // Write data to controller |
| DEBUGF("Write sector id=%d dest=%p\n", biosid, far_buffer); |
| if (mode == ATA_MODE_PIO32) |
| outsl_far(iobase1, far_buffer, 512 / 4); |
| else |
| outsw_far(iobase1, far_buffer, 512 / 2); |
| } else { |
| // Read data from controller |
| DEBUGF("Read sector id=%d dest=%p\n", biosid, far_buffer); |
| if (mode == ATA_MODE_PIO32) |
| insl_far(iobase1, far_buffer, 512 / 4); |
| else |
| insw_far(iobase1, far_buffer, 512 / 2); |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| } |
| far_buffer += 512; |
| |
| current++; |
| SET_EBDA(ata.trsfsectors,current); |
| count--; |
| status = inb(iobase1 + ATA_CB_STAT); |
| if (count == 0) |
| break; |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ |
| | ATA_CB_STAT_ERR); |
| if (status != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ)) { |
| DEBUGF("ata_transfer : more sectors left (status %02x)\n" |
| , (unsigned) status); |
| return 5; |
| } |
| } |
| |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF |
| | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR); |
| if (!iswrite) |
| status &= ~ATA_CB_STAT_DF; |
| if (status != ATA_CB_STAT_RDY ) { |
| DEBUGF("ata_transfer : no sectors left (status %02x)\n" |
| , (unsigned) status); |
| return 4; |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| return 0; |
| } |
| |
| // --------------------------------------------------------------------------- |
| // ATA/ATAPI driver : execute a packet command |
| // --------------------------------------------------------------------------- |
| // returns |
| // 0 : no error |
| // 1 : error in parameters |
| // 2 : BUSY bit set |
| // 3 : error |
| // 4 : not ready |
| int |
| ata_cmd_packet(u16 biosid, u8 *cmdbuf, u8 cmdlen |
| , u16 header, u32 length, void *far_buffer) |
| { |
| DEBUGF("ata_cmd_packet d=%d cmdlen=%d h=%d l=%d buf=%p\n" |
| , biosid, cmdlen, header, length, far_buffer); |
| |
| u8 channel = biosid / 2; |
| u8 slave = biosid % 2; |
| |
| // The header length must be even |
| if (header & 1) { |
| DEBUGF("ata_cmd_packet : header must be even (%04x)\n", header); |
| return 1; |
| } |
| |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| u8 mode = GET_EBDA(ata.devices[biosid].mode); |
| |
| struct ata_pio_command cmd; |
| cmd.sector_count = 0; |
| cmd.feature = 0; |
| cmd.lba_low = 0; |
| cmd.lba_mid = 0xf0; |
| cmd.lba_high = 0xff; |
| cmd.device = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0; |
| cmd.command = ATA_CMD_PACKET; |
| |
| cmd.biosid = biosid; |
| int ret = send_cmd(&cmd); |
| if (ret) |
| return ret; |
| |
| // Reset count of transferred data |
| SET_EBDA(ata.trsfsectors,0); |
| SET_EBDA(ata.trsfbytes,0L); |
| |
| // Send command to device |
| outsw_far(iobase1, MAKE_32_PTR(GET_SEG(SS), (u32)cmdbuf), cmdlen / 2); |
| |
| u8 status; |
| u16 loops = 0; |
| for (;;) { |
| if (loops == 0) {//first time through |
| status = inb(iobase2 + ATA_CB_ASTAT); |
| await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT); |
| } else |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| loops++; |
| |
| status = inb(iobase1 + ATA_CB_STAT); |
| inb(iobase1 + ATA_CB_SC); |
| |
| // Check if command completed |
| if(((inb(iobase1 + ATA_CB_SC)&0x7)==0x3) && |
| ((status & (ATA_CB_STAT_RDY | ATA_CB_STAT_ERR)) == ATA_CB_STAT_RDY)) |
| break; |
| |
| if (status & ATA_CB_STAT_ERR) { |
| DEBUGF("ata_cmd_packet : error (status %02x)\n", status); |
| return 3; |
| } |
| |
| // Get the byte count |
| u16 lcount = (((u16)(inb(iobase1 + ATA_CB_CH))<<8) |
| + inb(iobase1 + ATA_CB_CL)); |
| |
| // adjust to read what we want |
| u16 lbefore, lafter; |
| if (header > lcount) { |
| lbefore=lcount; |
| header-=lcount; |
| lcount=0; |
| } else { |
| lbefore=header; |
| header=0; |
| lcount-=lbefore; |
| } |
| |
| if (lcount > length) { |
| lafter=lcount-length; |
| lcount=length; |
| length=0; |
| } else { |
| lafter=0; |
| length-=lcount; |
| } |
| |
| // Save byte count |
| u16 count = lcount; |
| |
| DEBUGF("Trying to read %04x bytes (%04x %04x %04x) to %p\n" |
| , lbefore+lcount+lafter, lbefore, lcount, lafter, far_buffer); |
| |
| // If counts not dividable by 4, use 16bits mode |
| u8 lmode = mode; |
| if (lbefore & 0x03) lmode=ATA_MODE_PIO16; |
| if (lcount & 0x03) lmode=ATA_MODE_PIO16; |
| if (lafter & 0x03) lmode=ATA_MODE_PIO16; |
| |
| // adds an extra byte if count are odd. before is always even |
| if (lcount & 0x01) { |
| lcount+=1; |
| if ((lafter > 0) && (lafter & 0x01)) { |
| lafter-=1; |
| } |
| } |
| |
| if (lmode == ATA_MODE_PIO32) { |
| lcount>>=2; lbefore>>=2; lafter>>=2; |
| } else { |
| lcount>>=1; lbefore>>=1; lafter>>=1; |
| } |
| |
| int i; |
| for (i=0; i<lbefore; i++) |
| if (lmode == ATA_MODE_PIO32) |
| inl(iobase1); |
| else |
| inw(iobase1); |
| |
| if (lmode == ATA_MODE_PIO32) |
| insl_far(iobase1, far_buffer, lcount); |
| else |
| insw_far(iobase1, far_buffer, lcount); |
| |
| for (i=0; i<lafter; i++) |
| if (lmode == ATA_MODE_PIO32) |
| inl(iobase1); |
| else |
| inw(iobase1); |
| |
| // Compute new buffer address |
| far_buffer += count; |
| |
| // Save transferred bytes count |
| SET_EBDA(ata.trsfsectors, loops); |
| } |
| |
| // Final check, device must be ready |
| if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF |
| | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) ) |
| != ATA_CB_STAT_RDY ) { |
| DEBUGF("ata_cmd_packet : not ready (status %02x)\n" |
| , (unsigned) status); |
| return 4; |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| return 0; |
| } |
| |
| int |
| cdrom_read(u16 biosid, u32 lba, u32 count, void *far_buffer, u16 skip) |
| { |
| u16 sectors = (count + 2048 - 1) / 2048; |
| |
| u8 atacmd[12]; |
| memset(atacmd, 0, sizeof(atacmd)); |
| atacmd[0]=0x28; // READ command |
| atacmd[7]=(sectors & 0xff00) >> 8; // Sectors |
| atacmd[8]=(sectors & 0x00ff); // Sectors |
| atacmd[2]=(lba & 0xff000000) >> 24; // LBA |
| atacmd[3]=(lba & 0x00ff0000) >> 16; |
| atacmd[4]=(lba & 0x0000ff00) >> 8; |
| atacmd[5]=(lba & 0x000000ff); |
| |
| return ata_cmd_packet(biosid, atacmd, sizeof(atacmd) |
| , skip, count, far_buffer); |
| } |
| |
| // --------------------------------------------------------------------------- |
| // ATA/ATAPI driver : device detection |
| // --------------------------------------------------------------------------- |
| |
| void |
| ata_detect() |
| { |
| u8 hdcount, cdcount, device, type; |
| u8 buffer[0x0200]; |
| memset(buffer, 0, sizeof(buffer)); |
| |
| #if CONFIG_MAX_ATA_INTERFACES > 0 |
| SET_EBDA(ata.channels[0].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[0].iobase1,0x1f0); |
| SET_EBDA(ata.channels[0].iobase2,0x3f0); |
| SET_EBDA(ata.channels[0].irq,14); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 1 |
| SET_EBDA(ata.channels[1].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[1].iobase1,0x170); |
| SET_EBDA(ata.channels[1].iobase2,0x370); |
| SET_EBDA(ata.channels[1].irq,15); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 2 |
| SET_EBDA(ata.channels[2].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[2].iobase1,0x1e8); |
| SET_EBDA(ata.channels[2].iobase2,0x3e0); |
| SET_EBDA(ata.channels[2].irq,12); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 3 |
| SET_EBDA(ata.channels[3].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[3].iobase1,0x168); |
| SET_EBDA(ata.channels[3].iobase2,0x360); |
| SET_EBDA(ata.channels[3].irq,11); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 4 |
| #error Please fill the ATA interface informations |
| #endif |
| |
| // Device detection |
| hdcount=cdcount=0; |
| |
| for(device=0; device<CONFIG_MAX_ATA_DEVICES; device++) { |
| u16 iobase1, iobase2; |
| u8 channel, slave, shift; |
| u8 sc, sn, cl, ch, st; |
| |
| channel = device / 2; |
| slave = device % 2; |
| |
| iobase1 =GET_EBDA(ata.channels[channel].iobase1); |
| iobase2 =GET_EBDA(ata.channels[channel].iobase2); |
| |
| // Disable interrupts |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC); |
| |
| // Look for device |
| outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| outb(0x55, iobase1+ATA_CB_SC); |
| outb(0xaa, iobase1+ATA_CB_SN); |
| outb(0xaa, iobase1+ATA_CB_SC); |
| outb(0x55, iobase1+ATA_CB_SN); |
| outb(0x55, iobase1+ATA_CB_SC); |
| outb(0xaa, iobase1+ATA_CB_SN); |
| |
| // If we found something |
| sc = inb(iobase1+ATA_CB_SC); |
| sn = inb(iobase1+ATA_CB_SN); |
| |
| if ( (sc == 0x55) && (sn == 0xaa) ) { |
| SET_EBDA(ata.devices[device].type,ATA_TYPE_UNKNOWN); |
| |
| // reset the channel |
| ata_reset(device); |
| |
| // check for ATA or ATAPI |
| outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| sc = inb(iobase1+ATA_CB_SC); |
| sn = inb(iobase1+ATA_CB_SN); |
| if ((sc==0x01) && (sn==0x01)) { |
| cl = inb(iobase1+ATA_CB_CL); |
| ch = inb(iobase1+ATA_CB_CH); |
| st = inb(iobase1+ATA_CB_STAT); |
| |
| if ((cl==0x14) && (ch==0xeb)) { |
| SET_EBDA(ata.devices[device].type,ATA_TYPE_ATAPI); |
| } else if ((cl==0x00) && (ch==0x00) && (st!=0x00)) { |
| SET_EBDA(ata.devices[device].type,ATA_TYPE_ATA); |
| } else if ((cl==0xff) && (ch==0xff)) { |
| SET_EBDA(ata.devices[device].type,ATA_TYPE_NONE); |
| } |
| } |
| } |
| |
| type=GET_EBDA(ata.devices[device].type); |
| |
| // Now we send a IDENTIFY command to ATA device |
| if(type == ATA_TYPE_ATA) { |
| u32 sectors; |
| u16 cylinders, heads, spt, blksize; |
| u8 translation, removable, mode; |
| |
| //Temporary values to do the transfer |
| SET_EBDA(ata.devices[device].device,ATA_DEVICE_HD); |
| SET_EBDA(ata.devices[device].mode, ATA_MODE_PIO16); |
| |
| u16 ret = ata_cmd_data_chs(device, ATA_CMD_IDENTIFY_DEVICE |
| , 0, 0, 1, 1 |
| , MAKE_32_PTR(GET_SEG(SS), (u32)buffer)); |
| if (ret) |
| BX_PANIC("ata-detect: Failed to detect ATA device\n"); |
| |
| removable = (buffer[0] & 0x80) ? 1 : 0; |
| mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16; |
| blksize = *(u16*)&buffer[10]; |
| |
| cylinders = *(u16*)&buffer[1*2]; // word 1 |
| heads = *(u16*)&buffer[3*2]; // word 3 |
| spt = *(u16*)&buffer[6*2]; // word 6 |
| |
| sectors = *(u32*)&buffer[60*2]; // word 60 and word 61 |
| |
| SET_EBDA(ata.devices[device].device,ATA_DEVICE_HD); |
| SET_EBDA(ata.devices[device].removable, removable); |
| SET_EBDA(ata.devices[device].mode, mode); |
| SET_EBDA(ata.devices[device].blksize, blksize); |
| SET_EBDA(ata.devices[device].pchs.heads, heads); |
| SET_EBDA(ata.devices[device].pchs.cylinders, cylinders); |
| SET_EBDA(ata.devices[device].pchs.spt, spt); |
| SET_EBDA(ata.devices[device].sectors, sectors); |
| BX_INFO("ata%d-%d: PCHS=%u/%d/%d translation=" |
| , channel, slave,cylinders, heads, spt); |
| |
| translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2); |
| for (shift=device%4; shift>0; shift--) |
| translation >>= 2; |
| translation &= 0x03; |
| |
| SET_EBDA(ata.devices[device].translation, translation); |
| |
| switch (translation) { |
| case ATA_TRANSLATION_NONE: |
| BX_INFO("none"); |
| break; |
| case ATA_TRANSLATION_LBA: |
| BX_INFO("lba"); |
| break; |
| case ATA_TRANSLATION_LARGE: |
| BX_INFO("large"); |
| break; |
| case ATA_TRANSLATION_RECHS: |
| BX_INFO("r-echs"); |
| break; |
| } |
| switch (translation) { |
| case ATA_TRANSLATION_NONE: |
| break; |
| case ATA_TRANSLATION_LBA: |
| spt = 63; |
| sectors /= 63; |
| heads = sectors / 1024; |
| if (heads>128) heads = 255; |
| else if (heads>64) heads = 128; |
| else if (heads>32) heads = 64; |
| else if (heads>16) heads = 32; |
| else heads=16; |
| cylinders = sectors / heads; |
| break; |
| case ATA_TRANSLATION_RECHS: |
| // Take care not to overflow |
| if (heads==16) { |
| if(cylinders>61439) cylinders=61439; |
| heads=15; |
| cylinders = (u16)((u32)(cylinders)*16/15); |
| } |
| // then go through the large bitshift process |
| case ATA_TRANSLATION_LARGE: |
| while(cylinders > 1024) { |
| cylinders >>= 1; |
| heads <<= 1; |
| |
| // If we max out the head count |
| if (heads > 127) break; |
| } |
| break; |
| } |
| // clip to 1024 cylinders in lchs |
| if (cylinders > 1024) |
| cylinders=1024; |
| BX_INFO(" LCHS=%d/%d/%d\n", cylinders, heads, spt); |
| |
| SET_EBDA(ata.devices[device].lchs.heads, heads); |
| SET_EBDA(ata.devices[device].lchs.cylinders, cylinders); |
| SET_EBDA(ata.devices[device].lchs.spt, spt); |
| |
| // fill hdidmap |
| SET_EBDA(ata.idmap[0][hdcount], device); |
| hdcount++; |
| } |
| |
| // Now we send a IDENTIFY command to ATAPI device |
| if(type == ATA_TYPE_ATAPI) { |
| |
| u8 type, removable, mode; |
| u16 blksize; |
| |
| //Temporary values to do the transfer |
| SET_EBDA(ata.devices[device].device,ATA_DEVICE_CDROM); |
| SET_EBDA(ata.devices[device].mode, ATA_MODE_PIO16); |
| |
| u16 ret = ata_cmd_data_chs(device, ATA_CMD_IDENTIFY_DEVICE_PACKET |
| , 0, 0, 1, 1 |
| , MAKE_32_PTR(GET_SEG(SS), (u32)buffer)); |
| if (ret != 0) |
| BX_PANIC("ata-detect: Failed to detect ATAPI device\n"); |
| |
| type = buffer[1] & 0x1f; |
| removable = (buffer[0] & 0x80) ? 1 : 0; |
| mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16; |
| blksize = 2048; |
| |
| SET_EBDA(ata.devices[device].device, type); |
| SET_EBDA(ata.devices[device].removable, removable); |
| SET_EBDA(ata.devices[device].mode, mode); |
| SET_EBDA(ata.devices[device].blksize, blksize); |
| |
| // fill cdidmap |
| SET_EBDA(ata.idmap[1][cdcount], device); |
| cdcount++; |
| } |
| |
| u32 sizeinmb = 0; |
| u16 ataversion; |
| u8 c, i, version=0, model[41]; |
| |
| switch (type) { |
| case ATA_TYPE_ATA: |
| sizeinmb = GET_EBDA(ata.devices[device].sectors); |
| sizeinmb >>= 11; |
| case ATA_TYPE_ATAPI: |
| // Read ATA/ATAPI version |
| ataversion=((u16)(buffer[161])<<8) | buffer[160]; |
| for(version=15;version>0;version--) { |
| if ((ataversion&(1<<version))!=0) |
| break; |
| } |
| |
| // Read model name |
| for (i=0;i<20;i++) { |
| model[i*2] = buffer[(i*2)+54+1]; |
| model[(i*2)+1] = buffer[(i*2)+54]; |
| } |
| |
| // Reformat |
| model[40] = 0x00; |
| for (i=39;i>0;i--) { |
| if (model[i]==0x20) |
| model[i] = 0x00; |
| else |
| break; |
| } |
| break; |
| } |
| |
| switch (type) { |
| case ATA_TYPE_ATA: |
| printf("ata%d %s: ",channel,slave?" slave":"master"); |
| i=0; |
| while ((c=model[i++])) |
| printf("%c",c); |
| if (sizeinmb < (1UL<<16)) |
| printf(" ATA-%d Hard-Disk (%u MBytes)\n", version, (u16)sizeinmb); |
| else |
| printf(" ATA-%d Hard-Disk (%u GBytes)\n", version, (u16)(sizeinmb>>10)); |
| break; |
| case ATA_TYPE_ATAPI: |
| printf("ata%d %s: ",channel,slave?" slave":"master"); |
| i=0; |
| while ((c=model[i++])) |
| printf("%c",c); |
| if (GET_EBDA(ata.devices[device].device)==ATA_DEVICE_CDROM) |
| printf(" ATAPI-%d CD-Rom/DVD-Rom\n",version); |
| else |
| printf(" ATAPI-%d Device\n",version); |
| break; |
| case ATA_TYPE_UNKNOWN: |
| printf("ata%d %s: Unknown device\n",channel,slave?" slave":"master"); |
| break; |
| } |
| } |
| |
| // Store the devices counts |
| SET_EBDA(ata.hdcount, hdcount); |
| SET_EBDA(ata.cdcount, cdcount); |
| SET_BDA(disk_count, hdcount); |
| |
| printf("\n"); |
| |
| // FIXME : should use bios=cmos|auto|disable bits |
| // FIXME : should know about translation bits |
| // FIXME : move hard_drive_post here |
| } |