we can reaad CDROMS

kernel/drivers/ide/ide.h

@@ -0,0 +1,123 @@
+#ifndef KATA_H
+#define KATA_H
+
+#ifndef __ASSEMBLER__
+#include <stdint.h>
+#include <stddef.h>
+#endif
+
+#define IDE_PRIMARY_IO_BASE 0x01F0
+#define IDE_PRIMARY_CRTL_BASE 0x03F6
+
+#define IDE_SECONDARY_IO_BASE 0x0170
+#define IDE_SECONDARY_CRTL_BASE 0x0376
+
+#define IDE_DRIVE_MASTER 0xA0
+#define IDE_DRIVE_SLAVE 0xB0
+
+#define IO_DATA_REG 0x0000
+#define IO_ERROR_REG 0x0001
+#define IO_FEATURE_REG 0x0001
+#define IO_SECTOR_COUNT_REG 0x0002
+#define IO_SECTOR_NUM_REG 0x0003 
+#define IO_LBA_LO_REG 0x0003
+#define IO_CYL_LO_REG 0x0004
+#define IO_LBA_MID_REG 0x0004
+#define IO_LBA_HI_REG 0x0005
+#define IO_CYL_HI_REG 0x0005
+#define IO_DRIVE_SELECT_REG 0x0006
+#define IO_STATUS_REG 0x0007
+#define IO_CMD_REG 0x0007
+
+#define CTRL_ALT_STATUS_REG 0x00
+#define CTRL_DEV_CTRL_REG 0x00
+#define CTRL_DRIVE_ADDR_REG 0x01
+
+#define ERROR_REG_AMNF  0b00000001  // Address mark not found
+#define ERROR_REG_TKZNF 0b00000010  // Track zero not found
+#define ERROR_REG_ABRT  0b00000100  // Aborted command
+#define ERROR_REG_MCR   0b00001000  // Media change request
+#define ERROR_REG_IDNF  0b00010000  // ID not found
+#define ERROR_REG_MC    0b00100000  // Media changed
+#define ERROR_REG_UNC   0b01000000  // Uncorrectable data error
+#define ERROR_REG_BBK   0b10000000  // Bad Block detected
+
+#define DRIVE_SELECT_REG_BN     0b00000111
+#define DRIVE_SELECT_REG_DRV    0b00010000
+#define DRIVE_SELECT_REG_LBA   0b01000000
+
+#define STATUS_REG_ERR  0b00000001
+#define STATUS_REG_IDX  0b00000010
+#define STATUS_REG_CORR 0b00000100
+#define STATUS_REG_DRQ  0b00001000
+#define STATUS_REG_SRV  0b00010000
+#define STATUS_REG_DF   0b00100000
+#define STATUS_REG_RDY  0b01000000
+#define STATUS_REG_BSY  0b10000000
+
+#define DEV_CTRL_REG_nIEN   0b00000010
+#define DEV_CTRL_REG_SRST   0b00000100
+#define DEV_CTRL_REG_HOB    0b10000000
+
+#define DRIVE_ADDR_REG_DS0      0b00000001
+#define DRIVE_ADDR_REG_DS1      0b00000010
+#define DRIVE_ADDR_REG_HEAD     0b00111100
+#define DRIVE_ADDR_REG_WTG      0b01000000
+
+#define ATA_CMD_READ_PIO          0x20
+#define ATA_CMD_READ_PIO_EXT      0x24
+#define ATA_CMD_READ_DMA          0xC8
+#define ATA_CMD_READ_DMA_EXT      0x25
+#define ATA_CMD_WRITE_PIO         0x30
+#define ATA_CMD_WRITE_PIO_EXT     0x34
+#define ATA_CMD_WRITE_DMA         0xCA
+#define ATA_CMD_WRITE_DMA_EXT     0x35
+#define ATA_CMD_CACHE_FLUSH       0xE7
+#define ATA_CMD_CACHE_FLUSH_EXT   0xEA
+#define ATA_CMD_PACKET            0xA0
+#define ATA_CMD_IDENTIFY_PACKET   0xA1
+#define ATA_CMD_IDENTIFY          0xEC
+
+#define ATAPI_CMD_READ       0xA8
+#define ATAPI_CMD_EJECT      0x1B
+
+#define ATA_IDENT_DEVICETYPE   0
+#define ATA_IDENT_CYLINDERS    2
+#define ATA_IDENT_HEADS        6
+#define ATA_IDENT_SECTORS      12
+#define ATA_IDENT_SERIAL       20
+#define ATA_IDENT_MODEL        54
+#define ATA_IDENT_MODEL_SZ     40
+#define ATA_IDENT_CAPABILITIES 98
+#define ATA_IDENT_FIELDVALID   106
+#define ATA_IDENT_MAX_LBA      120
+#define ATA_IDENT_COMMANDSETS  164
+#define ATA_IDENT_MAX_LBA_EXT  200
+
+#ifndef __ASSEMBLER__
+typedef enum {
+    NO_DEVICE = 0,
+    ATA,
+    ATAPI,
+} ide_dev_type;
+
+
+typedef struct __attribute__((packed)) {
+    uint16_t bus;
+    uint8_t device;
+    ide_dev_type type;
+    uint16_t sig;
+    uint16_t capabilities;
+    uint32_t command_set;
+    char* serial;
+    char* model;
+    uint32_t size;
+} ide_device_t;
+
+void scan_drives();
+ide_device_t* get_device(uint8_t slot);
+int ide_read_blks(ide_device_t* dev, uint32_t lba, uint32_t sectors, void* buf);
+
+#endif
+
+#endif