struct ide_cd_state {
struct atapi_sense_data sense;
uint_t current_lba;
+ uint8_t atapi_cmd;
+ struct atapi_error_recovery err_recovery;
};
struct ide_hd_state {
// calculated for easy access
uint_t transfer_length;
+
// We have a local data buffer that we use for IO port accesses
uint8_t data_buf[DATA_BUFFER_SIZE];
+
void * private_data;
+
+ union {
+ uint8_t sector_count; // 0x1f2,0x172
+ struct atapi_irq_flags irq_flags;
+ } __attribute__((packed));
- uint8_t sector_count; // 0x1f2,0x172
uint8_t sector_num; // 0x1f3,0x173
+
union {
uint16_t cylinder;
+
struct {
uint8_t cylinder_low; // 0x1f4,0x174
uint8_t cylinder_high; // 0x1f5,0x175
} __attribute__((packed));
+
+ // The transfer length requested by the CPU
+ uint16_t req_len;
} __attribute__((packed));
-static inline uint32_t be_to_le_16(const uint16_t val) {
+static inline uint16_t be_to_le_16(const uint16_t val) {
uint8_t * buf = (uint8_t *)&val;
return (buf[0] << 8) | (buf[1]) ;
}
+static inline uint16_t le_to_be_16(const uint16_t val) {
+ return be_to_le_16(val);
+}
+
static inline uint32_t be_to_le_32(const uint32_t val) {
uint8_t * buf = (uint8_t *)&val;
return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}
+static inline uint32_t le_to_be_32(const uint32_t val) {
+ return be_to_le_32(val);
+}
+
static inline int get_channel_index(ushort_t port) {
if (((port & 0xfff8) == 0x1f0) ||
memset(drive->data_buf, 0, sizeof(drive->data_buf));
- drive->transfer_length = 0;
drive->transfer_index = 0;
// Send the reset signal to the connected device callbacks
}
-
-
// Include the ATAPI interface handlers
#include "atapi.h"
-
-
static int write_cmd_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
struct ide_channel * channel = get_selected_channel(ide, port);
struct ide_channel * channel = get_selected_channel(ide, port);
struct ide_drive * drive = get_selected_drive(channel);
- PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n", port, *(uint32_t *)src, length);
+ // PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n",
+ // port, *(uint32_t *)src, length);
memcpy(drive->data_buf + drive->transfer_index, src, length);
drive->transfer_index += length;
}
-static int read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
- struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
- struct ide_channel * channel = get_selected_channel(ide, port);
+static int read_hd_data(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
+ PrintError("Harddrive data port read not implemented\n");
+ return -1;
+}
+
+
+
+static int read_cd_data(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
struct ide_drive * drive = get_selected_drive(channel);
int data_offset = drive->transfer_index % DATA_BUFFER_SIZE;
+ int req_offset = drive->transfer_index % drive->req_len;
+
+ if (drive->cd_state.atapi_cmd != 0x28) {
+ PrintDebug("IDE: Reading CD Data (len=%d) (req_len=%d)\n", length, drive->req_len);
+ }
- PrintDebug("IDE: Reading Data Port %x\n", port);
-
- if (data_offset == DATA_BUFFER_SIZE) {
- // check for more data to transfer, if there isn't any then that's a problem...
- /*
- * if (ide_update_buffer(drive) == -1) {
- * return -1;
- * }
- */
+ if (drive->transfer_index >= drive->transfer_length) {
+ PrintError("Buffer Overrun... (xfer_len=%d) (cur_idx=%d) (post_idx=%d)\n",
+ drive->transfer_length, drive->transfer_index,
+ drive->transfer_index + length);
return -1;
}
- // check for overruns...
- // We will return the data padded with 0's
- if (drive->transfer_index + length > drive->transfer_length) {
- length = drive->transfer_length - drive->transfer_index;
- memset(dst, 0, length);
+
+ if ((data_offset == 0) && (drive->transfer_index > 0)) {
+
+ if (drive->drive_type == IDE_CDROM) {
+ if (atapi_update_data_buf(dev, channel) == -1) {
+ PrintError("Could not update CDROM data buffer\n");
+ return -1;
+ }
+ } else {
+ PrintError("IDE Harddrives not implemented\n");
+ return -1;
+ }
}
memcpy(dst, drive->data_buf + data_offset, length);
-
+
drive->transfer_index += length;
+ if ((req_offset == 0) && (drive->transfer_index > 0)) {
+ if (drive->transfer_index < drive->transfer_length) {
+ // An increment is complete, but there is still more data to be transferred...
+
+ channel->status.data_req = 1;
+
+ drive->irq_flags.c_d = 0;
+
+ // Update the request length in the cylinder regs
+ if (atapi_update_req_len(dev, channel, drive->transfer_length - drive->transfer_index) == -1) {
+ PrintError("Could not update request length after completed increment\n");
+ return -1;
+ }
+ } else {
+ // This was the final read of the request
+ channel->status.data_req = 0;
+ channel->status.ready = 1;
+
+ drive->irq_flags.c_d = 1;
+ drive->irq_flags.rel = 0;
+ }
+
+ drive->irq_flags.io_dir = 1;
+ channel->status.busy = 0;
+
+ ide_raise_irq(dev, channel);
+ }
+
+ return length;
+}
+
+
+static int read_drive_id(uint8_t * dst, uint_t length, struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.write_fault = 0;
+ channel->status.seek_complete = 1;
+ channel->status.corrected = 0;
+ channel->status.error = 0;
+
+
+ memcpy(dst, drive->data_buf + drive->transfer_index, length);
+ drive->transfer_index += length;
if (drive->transfer_index >= drive->transfer_length) {
channel->status.data_req = 0;
}
+
+ return length;
+}
+
+
+static int ide_read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
+ struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
+ struct ide_channel * channel = get_selected_channel(ide, port);
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ // PrintDebug("IDE: Reading Data Port %x (len=%d)\n", port, length);
+
+ if ((channel->cmd_reg == 0xec) ||
+ (channel->cmd_reg == 0xa1)) {
+ return read_drive_id((uint8_t *)dst, length, dev, channel);
+ }
+
+ if (drive->drive_type == IDE_CDROM) {
+ if (read_cd_data((uint8_t *)dst, length, dev, channel) == -1) {
+ PrintError("IDE: Could not read CD Data\n");
+ return -1;
+ }
+ } else if (drive->drive_type == IDE_DISK) {
+ if (read_hd_data((uint8_t *)dst, length, dev, channel) == -1) {
+ PrintError("IDE: Could not read HD Data\n");
+ return -1;
+ }
+ } else {
+ memset((uint8_t *)dst, 0, length);
+ }
return length;
}
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, PRI_DATA_PORT,
- &read_data_port, &write_data_port);
+ &ide_read_data_port, &write_data_port);
v3_dev_hook_io(dev, PRI_FEATURES_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, PRI_SECT_CNT_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, SEC_DATA_PORT,
- &read_data_port, &write_data_port);
+ &ide_read_data_port, &write_data_port);
v3_dev_hook_io(dev, SEC_FEATURES_PORT,
&read_port_std, &write_port_std);
v3_dev_hook_io(dev, SEC_SECT_CNT_PORT,
