156 lines
3.7 KiB
C
156 lines
3.7 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* ToAruOS PCI Initialization
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*/
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#include <system.h>
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#include <ata.h>
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#include <logging.h>
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ide_channel_regs_t ide_channels[2];
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ide_device_t ide_devices[4];
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uint8_t ide_buf[2048] = {0};
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uint8_t ide_irq_invoked = 0;
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uint8_t atapi_packet[12] = {0xA8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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void ide_detect() {
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}
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void ata_io_wait(uint16_t bus) {
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inportb(bus + ATA_REG_ALTSTATUS);
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inportb(bus + ATA_REG_ALTSTATUS);
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inportb(bus + ATA_REG_ALTSTATUS);
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inportb(bus + ATA_REG_ALTSTATUS);
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}
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int ata_wait(uint16_t bus, int advanced) {
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uint8_t status = 0;
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ata_io_wait(bus);
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while ((status = inportb(bus + ATA_REG_STATUS)) & ATA_SR_BSY);
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if (advanced) {
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status = inportb(bus + ATA_REG_STATUS);
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if (status & ATA_SR_ERR) return 1;
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if (status & ATA_SR_DF) return 1;
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if (!(status & ATA_SR_DRQ)) return 1;
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}
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return 0;
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}
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void ata_select(uint16_t bus) {
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outportb(bus + ATA_REG_HDDEVSEL, 0xA0);
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}
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void ata_wait_ready(uint16_t bus) {
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while (inportb(bus + ATA_REG_STATUS) & ATA_SR_BSY);
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}
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void ide_init(uint16_t bus) {
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debug_print(NOTICE, "initializing IDE device on bus %d", bus);
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outportb(bus + 1, 1);
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outportb(bus + 0x306, 0);
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ata_select(bus);
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ata_io_wait(bus);
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outportb(bus + ATA_REG_COMMAND, ATA_CMD_IDENTIFY);
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ata_io_wait(bus);
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int status = inportb(bus + ATA_REG_COMMAND);
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debug_print(INFO, "status = %x", status);
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ata_wait_ready(bus);
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ata_identify_t device;
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uint16_t * buf = (uint16_t *)&device;
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for (int i = 0; i < 256; ++i) {
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buf[i] = inports(bus);
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}
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uint8_t * ptr = (uint8_t *)&device.model;
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for (int i = 0; i < 39; i+=2) {
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uint8_t tmp = ptr[i+1];
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ptr[i+1] = ptr[i];
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ptr[i] = tmp;
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}
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debug_print(NOTICE, "ata device %s", device.model);
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debug_print(NOTICE, "sectors_48 = %d", (uint32_t)device.sectors_48);
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debug_print(NOTICE, "sectors_28 = %d", device.sectors_28);
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outportb(bus + ATA_REG_CONTROL, 0x02);
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}
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void ide_read_sector(uint16_t bus, uint8_t slave, uint32_t lba, uint8_t * buf) {
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outportb(bus + ATA_REG_CONTROL, 0x02);
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ata_wait_ready(bus);
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outportb(bus + ATA_REG_HDDEVSEL, 0xe0 | slave << 4 |
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(lba & 0x0f000000) >> 24);
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outportb(bus + ATA_REG_FEATURES, 0x00);
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outportb(bus + ATA_REG_SECCOUNT0, 1);
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outportb(bus + ATA_REG_LBA0, (lba & 0x000000ff) >> 0);
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outportb(bus + ATA_REG_LBA1, (lba & 0x0000ff00) >> 8);
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outportb(bus + ATA_REG_LBA2, (lba & 0x00ff0000) >> 16);
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outportb(bus + ATA_REG_COMMAND, ATA_CMD_READ_PIO);
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if (ata_wait(bus, 1)) {
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debug_print(WARNING, "Error during ATA read");
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}
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int size = 256;
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inportsm(bus,buf,size);
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ata_wait(bus, 0);
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}
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void ide_write_sector(uint16_t bus, uint8_t slave, uint32_t lba, uint8_t * buf) {
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outportb(bus + ATA_REG_CONTROL, 0x02);
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ata_wait_ready(bus);
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outportb(bus + ATA_REG_HDDEVSEL, 0xe0 | slave << 4 |
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(lba & 0x0f000000) >> 24);
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ata_wait(bus, 0);
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outportb(bus + ATA_REG_FEATURES, 0x00);
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outportb(bus + ATA_REG_SECCOUNT0, 0x01);
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outportb(bus + ATA_REG_LBA0, (lba & 0x000000ff) >> 0);
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outportb(bus + ATA_REG_LBA1, (lba & 0x0000ff00) >> 8);
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outportb(bus + ATA_REG_LBA2, (lba & 0x00ff0000) >> 16);
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outportb(bus + ATA_REG_COMMAND, ATA_CMD_WRITE_PIO);
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ata_wait(bus, 0);
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int size = 256;
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outportsm(bus,buf,size);
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outportb(bus + 0x07, ATA_CMD_CACHE_FLUSH);
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ata_wait(bus, 0);
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}
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int ide_cmp(uint32_t * ptr1, uint32_t * ptr2, size_t size) {
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assert(!(size % 4));
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uint32_t i = 0;
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while (i < size) {
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if (*ptr1 != *ptr2) return 1;
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ptr1++;
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ptr2++;
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i += 4;
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}
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return 0;
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}
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void ide_write_sector_retry(uint16_t bus, uint8_t slave, uint32_t lba, uint8_t * buf) {
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uint8_t * read_buf = malloc(512);
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IRQ_OFF;
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do {
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ide_write_sector(bus,slave,lba,buf);
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ide_read_sector(bus,slave,lba,read_buf);
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} while (ide_cmp((uint32_t*)buf,(uint32_t*)read_buf,512));
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IRQ_RES;
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}
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