| 0,0 → 1,438 |
|---|
| /* |
| * Copyright (c) 2009 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup bd |
| * @{ |
| */ |
| |
| /** |
| * @file |
| * @brief ATA disk driver |
| * |
| * This driver currently works only with CHS addressing and uses PIO. |
| * Currently based on the (now obsolete) ANSI X3.221-1994 (ATA-1) standard. |
| * At this point only reading is possible, not writing. |
| * |
| * The driver services a single controller which can have up to two disks |
| * attached. |
| */ |
| |
| #include <stdio.h> |
| #include <libarch/ddi.h> |
| #include <ddi.h> |
| #include <ipc/ipc.h> |
| #include <ipc/bd.h> |
| #include <async.h> |
| #include <as.h> |
| #include <fibril_sync.h> |
| #include <devmap.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <bool.h> |
| |
| #include "ata_bd.h" |
| |
| #define NAME "ata_bd" |
| |
| static const size_t block_size = 512; |
| static size_t comm_size; |
| |
| static uintptr_t cmd_physical = 0x1f0; |
| static uintptr_t ctl_physical = 0x170; |
| static ata_cmd_t *cmd; |
| static ata_ctl_t *ctl; |
| |
| /** Per-disk state. */ |
| static disk_t disk[MAX_DISKS]; |
| |
| static int ata_bd_init(void); |
| static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall); |
| static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size, |
| void *buf); |
| static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt, |
| void *buf); |
| static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt, |
| const void *buf); |
| static int drive_identify(int drive_id, disk_t *d); |
| |
| int main(int argc, char **argv) |
| { |
| uint8_t status; |
| char name[16]; |
| int i, rc; |
| int n_disks; |
| |
| printf(NAME ": ATA disk driver\n"); |
| |
| printf("I/O address 0x%x\n", cmd_physical); |
| |
| if (ata_bd_init() != EOK) |
| return -1; |
| |
| /* Put drives to reset, disable interrupts. */ |
| printf("Reset drives...\n"); |
| pio_write_8(&ctl->device_control, DCR_SRST); |
| /* FIXME: Find out how to do this properly. */ |
| async_usleep(100); |
| pio_write_8(&ctl->device_control, 0); |
| |
| do { |
| status = pio_read_8(&cmd->status); |
| } while ((status & SR_BSY) != 0); |
| printf("Done\n"); |
| |
| printf("Status = 0x%x\n", pio_read_8(&cmd->status)); |
| |
| (void) drive_identify(0, &disk[0]); |
| (void) drive_identify(1, &disk[1]); |
| |
| n_disks = 0; |
| |
| for (i = 0; i < MAX_DISKS; i++) { |
| /* Skip unattached drives. */ |
| if (disk[i].present == false) |
| continue; |
| |
| snprintf(name, 16, "disk%d", i); |
| rc = devmap_device_register(name, &disk[i].dev_handle); |
| if (rc != EOK) { |
| devmap_hangup_phone(DEVMAP_DRIVER); |
| printf(NAME ": Unable to register device %s.\n", |
| name); |
| return rc; |
| } |
| ++n_disks; |
| } |
| |
| if (n_disks == 0) { |
| printf("No disks detected.\n"); |
| return -1; |
| } |
| |
| printf(NAME ": Accepting connections\n"); |
| async_manager(); |
| |
| /* Not reached */ |
| return 0; |
| } |
| |
| static int drive_identify(int disk_id, disk_t *d) |
| { |
| uint16_t data; |
| uint8_t status; |
| size_t i; |
| |
| printf("Identify drive %d\n", disk_id); |
| pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0)); |
| async_usleep(100); |
| pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE); |
| |
| status = pio_read_8(&cmd->status); |
| printf("Status = 0x%x\n", status); |
| |
| d->present = false; |
| |
| /* |
| * Detect if drive is present. This is Qemu only! Need to |
| * do the right thing to work with real drives. |
| */ |
| if ((status & SR_DRDY) == 0) { |
| printf("None attached.\n"); |
| return ENOENT; |
| } |
| |
| for (i = 0; i < block_size / 2; i++) { |
| do { |
| status = pio_read_8(&cmd->status); |
| } while ((status & SR_DRDY) == 0); |
| |
| data = pio_read_16(&cmd->data_port); |
| |
| switch (i) { |
| case 1: d->cylinders = data; break; |
| case 3: d->heads = data; break; |
| case 6: d->sectors = data; break; |
| } |
| } |
| |
| d->blocks = d->cylinders * d->heads * d->sectors; |
| |
| printf("Geometry: %u cylinders, %u heads, %u sectors\n", |
| d->cylinders, d->heads, d->sectors); |
| |
| d->present = true; |
| fibril_mutex_initialize(&d->lock); |
| |
| return EOK; |
| } |
| |
| static int ata_bd_init(void) |
| { |
| void *vaddr; |
| int rc; |
| |
| rc = devmap_driver_register(NAME, ata_bd_connection); |
| if (rc < 0) { |
| printf(NAME ": Unable to register driver.\n"); |
| return rc; |
| } |
| |
| rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr); |
| if (rc != EOK) { |
| printf(NAME ": Could not initialize device I/O space.\n"); |
| return rc; |
| } |
| |
| cmd = vaddr; |
| |
| rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr); |
| if (rc != EOK) { |
| printf(NAME ": Could not initialize device I/O space.\n"); |
| return rc; |
| } |
| |
| ctl = vaddr; |
| |
| |
| return EOK; |
| } |
| |
| static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall) |
| { |
| void *fs_va = NULL; |
| ipc_callid_t callid; |
| ipc_call_t call; |
| ipcarg_t method; |
| dev_handle_t dh; |
| int flags; |
| int retval; |
| off_t idx; |
| size_t size; |
| int disk_id, i; |
| |
| /* Get the device handle. */ |
| dh = IPC_GET_ARG1(*icall); |
| |
| /* Determine which disk device is the client connecting to. */ |
| disk_id = -1; |
| for (i = 0; i < MAX_DISKS; i++) |
| if (disk[i].dev_handle == dh) |
| disk_id = i; |
| |
| if (disk_id < 0 || disk[disk_id].present == false) { |
| ipc_answer_0(iid, EINVAL); |
| return; |
| } |
| |
| /* Answer the IPC_M_CONNECT_ME_TO call. */ |
| ipc_answer_0(iid, EOK); |
| |
| if (!ipc_share_out_receive(&callid, &comm_size, &flags)) { |
| ipc_answer_0(callid, EHANGUP); |
| return; |
| } |
| |
| fs_va = as_get_mappable_page(comm_size); |
| if (fs_va == NULL) { |
| ipc_answer_0(callid, EHANGUP); |
| return; |
| } |
| |
| (void) ipc_share_out_finalize(callid, fs_va); |
| |
| while (1) { |
| callid = async_get_call(&call); |
| method = IPC_GET_METHOD(call); |
| switch (method) { |
| case IPC_M_PHONE_HUNGUP: |
| /* The other side has hung up. */ |
| ipc_answer_0(callid, EOK); |
| return; |
| case BD_READ_BLOCK: |
| case BD_WRITE_BLOCK: |
| idx = IPC_GET_ARG1(call); |
| size = IPC_GET_ARG2(call); |
| if (size > comm_size) { |
| retval = EINVAL; |
| break; |
| } |
| retval = ata_bd_rdwr(disk_id, method, idx, |
| size, fs_va); |
| break; |
| default: |
| retval = EINVAL; |
| break; |
| } |
| ipc_answer_0(callid, retval); |
| } |
| } |
| |
| static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size, |
| void *buf) |
| { |
| int rc; |
| size_t now; |
| |
| while (size > 0) { |
| now = size < block_size ? size : block_size; |
| if (now != block_size) |
| return EINVAL; |
| |
| if (method == BD_READ_BLOCK) |
| rc = ata_bd_read_block(disk_id, blk_idx, 1, buf); |
| else |
| rc = ata_bd_write_block(disk_id, blk_idx, 1, buf); |
| |
| if (rc != EOK) |
| return rc; |
| |
| buf += block_size; |
| blk_idx++; |
| |
| if (size > block_size) |
| size -= block_size; |
| else |
| size = 0; |
| } |
| |
| return EOK; |
| } |
| |
| |
| static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt, |
| void *buf) |
| { |
| size_t i; |
| uint16_t data; |
| uint8_t status; |
| uint64_t c, h, s; |
| uint64_t idx; |
| uint8_t drv_head; |
| disk_t *d; |
| |
| d = &disk[disk_id]; |
| |
| /* Check device bounds. */ |
| if (blk_idx >= d->blocks) |
| return EINVAL; |
| |
| /* Compute CHS. */ |
| c = blk_idx / (d->heads * d->sectors); |
| idx = blk_idx % (d->heads * d->sectors); |
| |
| h = idx / d->sectors; |
| s = 1 + (idx % d->sectors); |
| |
| /* New value for Drive/Head register */ |
| drv_head = |
| ((disk_id != 0) ? DHR_DRV : 0) | |
| (h & 0x0f); |
| |
| fibril_mutex_lock(&d->lock); |
| |
| /* Program a Read Sectors operation. */ |
| |
| pio_write_8(&cmd->drive_head, drv_head); |
| pio_write_8(&cmd->sector_count, 1); |
| pio_write_8(&cmd->sector_number, s); |
| pio_write_8(&cmd->cylinder_low, c & 0xff); |
| pio_write_8(&cmd->cylinder_high, c >> 16); |
| pio_write_8(&cmd->command, CMD_READ_SECTORS); |
| |
| /* Read data from the disk buffer. */ |
| |
| for (i = 0; i < block_size / 2; i++) { |
| do { |
| status = pio_read_8(&cmd->status); |
| } while ((status & SR_DRDY) == 0); |
| |
| data = pio_read_16(&cmd->data_port); |
| ((uint16_t *) buf)[i] = data; |
| } |
| |
| fibril_mutex_unlock(&d->lock); |
| return EOK; |
| } |
| |
| static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt, |
| const void *buf) |
| { |
| size_t i; |
| uint8_t status; |
| uint64_t c, h, s; |
| uint64_t idx; |
| uint8_t drv_head; |
| disk_t *d; |
| |
| d = &disk[disk_id]; |
| |
| /* Check device bounds. */ |
| if (blk_idx >= d->blocks) |
| return EINVAL; |
| |
| /* Compute CHS. */ |
| c = blk_idx / (d->heads * d->sectors); |
| idx = blk_idx % (d->heads * d->sectors); |
| |
| h = idx / d->sectors; |
| s = 1 + (idx % d->sectors); |
| |
| /* New value for Drive/Head register */ |
| drv_head = |
| ((disk_id != 0) ? DHR_DRV : 0) | |
| (h & 0x0f); |
| |
| fibril_mutex_lock(&d->lock); |
| |
| /* Program a Read Sectors operation. */ |
| |
| pio_write_8(&cmd->drive_head, drv_head); |
| pio_write_8(&cmd->sector_count, 1); |
| pio_write_8(&cmd->sector_number, s); |
| pio_write_8(&cmd->cylinder_low, c & 0xff); |
| pio_write_8(&cmd->cylinder_high, c >> 16); |
| pio_write_8(&cmd->command, CMD_WRITE_SECTORS); |
| |
| /* Write data to the disk buffer. */ |
| |
| for (i = 0; i < block_size / 2; i++) { |
| do { |
| status = pio_read_8(&cmd->status); |
| } while ((status & SR_DRDY) == 0); |
| |
| pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]); |
| } |
| |
| fibril_mutex_unlock(&d->lock); |
| return EOK; |
| } |
| |
| |
| /** |
| * @} |
| */ |