488 lines
13 KiB
C
488 lines
13 KiB
C
/*
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* File : block_dev.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2011-07-25 weety first version
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*/
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#include <rtthread.h>
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#include <dfs_fs.h>
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#include <drivers/mmcsd_core.h>
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static rt_list_t blk_devices = RT_LIST_OBJECT_INIT(blk_devices);
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struct mmcsd_blk_device
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{
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struct rt_mmcsd_card *card;
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rt_list_t list;
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struct rt_device dev;
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struct dfs_partition part;
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struct rt_device_blk_geometry geometry;
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};
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#ifndef RT_MMCSD_MAX_PARTITION
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#define RT_MMCSD_MAX_PARTITION 16
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#endif
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rt_int32_t mmcsd_num_wr_blocks(struct rt_mmcsd_card *card)
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{
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rt_int32_t err;
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rt_uint32_t blocks;
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struct rt_mmcsd_req req;
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struct rt_mmcsd_cmd cmd;
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struct rt_mmcsd_data data;
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rt_uint32_t timeout_us;
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rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));
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cmd.cmd_code = APP_CMD;
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cmd.arg = card->rca << 16;
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cmd.flags = RESP_SPI_R1 | RESP_R1 | CMD_AC;
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err = mmcsd_send_cmd(card->host, &cmd, 0);
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if (err)
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return -RT_ERROR;
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if (!controller_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
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return -RT_ERROR;
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rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));
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cmd.cmd_code = SD_APP_SEND_NUM_WR_BLKS;
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cmd.arg = 0;
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cmd.flags = RESP_SPI_R1 | RESP_R1 | CMD_ADTC;
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rt_memset(&data, 0, sizeof(struct rt_mmcsd_data));
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data.timeout_ns = card->tacc_ns * 100;
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data.timeout_clks = card->tacc_clks * 100;
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timeout_us = data.timeout_ns / 1000;
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timeout_us += data.timeout_clks * 1000 /
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(card->host->io_cfg.clock / 1000);
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if (timeout_us > 100000)
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{
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data.timeout_ns = 100000000;
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data.timeout_clks = 0;
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}
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data.blksize = 4;
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data.blks = 1;
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data.flags = DATA_DIR_READ;
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data.buf = &blocks;
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rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
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req.cmd = &cmd;
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req.data = &data;
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mmcsd_send_request(card->host, &req);
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if (cmd.err || data.err)
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return -RT_ERROR;
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return blocks;
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}
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static rt_err_t rt_mmcsd_req_blk(struct rt_mmcsd_card *card,
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rt_uint32_t sector,
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void *buf,
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rt_size_t blks,
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rt_uint8_t dir)
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{
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struct rt_mmcsd_cmd cmd, stop;
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struct rt_mmcsd_data data;
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struct rt_mmcsd_req req;
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struct rt_mmcsd_host *host = card->host;
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rt_uint32_t r_cmd, w_cmd;
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mmcsd_host_lock(host);
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rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
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rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));
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rt_memset(&stop, 0, sizeof(struct rt_mmcsd_cmd));
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rt_memset(&data, 0, sizeof(struct rt_mmcsd_data));
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req.cmd = &cmd;
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req.data = &data;
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cmd.arg = sector;
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if (!(card->flags & CARD_FLAG_SDHC))
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{
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cmd.arg <<= 9;
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}
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cmd.flags = RESP_SPI_R1 | RESP_R1 | CMD_ADTC;
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data.blksize = SECTOR_SIZE;
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data.blks = blks;
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if (blks > 1)
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{
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if (!controller_is_spi(card->host) || !dir)
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{
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req.stop = &stop;
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stop.cmd_code = STOP_TRANSMISSION;
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stop.arg = 0;
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stop.flags = RESP_SPI_R1B | RESP_R1B | CMD_AC;
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}
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r_cmd = READ_MULTIPLE_BLOCK;
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w_cmd = WRITE_MULTIPLE_BLOCK;
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}
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else
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{
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req.stop = RT_NULL;
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r_cmd = READ_SINGLE_BLOCK;
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w_cmd = WRITE_BLOCK;
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}
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if (!dir)
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{
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cmd.cmd_code = r_cmd;
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data.flags |= DATA_DIR_READ;
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}
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else
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{
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cmd.cmd_code = w_cmd;
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data.flags |= DATA_DIR_WRITE;
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}
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mmcsd_set_data_timeout(&data, card);
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data.buf = buf;
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mmcsd_send_request(host, &req);
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if (!controller_is_spi(card->host) && dir != 0)
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{
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do
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{
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rt_int32_t err;
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cmd.cmd_code = SEND_STATUS;
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cmd.arg = card->rca << 16;
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cmd.flags = RESP_R1 | CMD_AC;
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err = mmcsd_send_cmd(card->host, &cmd, 5);
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if (err)
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{
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rt_kprintf("error %d requesting status\n", err);
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break;
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}
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/*
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* Some cards mishandle the status bits,
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* so make sure to check both the busy
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* indication and the card state.
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*/
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} while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
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(R1_CURRENT_STATE(cmd.resp[0]) == 7));
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}
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mmcsd_host_unlock(host);
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if (cmd.err || data.err || stop.err)
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{
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rt_kprintf("mmcsd request blocks error\n");
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rt_kprintf("%d,%d,%d, 0x%08x,0x%08x\n",
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cmd.err, data.err, stop.err, data.flags, sector);
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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static rt_err_t rt_mmcsd_init(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t rt_mmcsd_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t rt_mmcsd_close(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t rt_mmcsd_control(rt_device_t dev, int cmd, void *args)
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{
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struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_BLK_GETGEOME:
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rt_memcpy(args, &blk_dev->geometry, sizeof(struct rt_device_blk_geometry));
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break;
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default:
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break;
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}
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return RT_EOK;
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}
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static rt_size_t rt_mmcsd_read(rt_device_t dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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rt_err_t err;
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struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
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struct dfs_partition *part = &blk_dev->part;
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if (dev == RT_NULL)
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{
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rt_set_errno(-EINVAL);
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return 0;
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}
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rt_sem_take(part->lock, RT_WAITING_FOREVER);
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err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos, buffer, size, 0);
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rt_sem_release(part->lock);
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/* the length of reading must align to SECTOR SIZE */
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if (err)
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{
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rt_set_errno(-EIO);
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return 0;
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}
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return size;
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}
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static rt_size_t rt_mmcsd_write(rt_device_t dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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rt_err_t err;
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struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
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struct dfs_partition *part = &blk_dev->part;
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if (dev == RT_NULL)
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{
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rt_set_errno(-EINVAL);
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return 0;
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}
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rt_sem_take(part->lock, RT_WAITING_FOREVER);
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err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos, (void *)buffer, size, 1);
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rt_sem_release(part->lock);
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/* the length of reading must align to SECTOR SIZE */
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if (err)
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{
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rt_set_errno(-EIO);
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return 0;
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}
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return size;
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}
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static rt_int32_t mmcsd_set_blksize(struct rt_mmcsd_card *card)
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{
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struct rt_mmcsd_cmd cmd;
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int err;
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/* Block-addressed cards ignore MMC_SET_BLOCKLEN. */
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if (card->flags & CARD_FLAG_SDHC)
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return 0;
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mmcsd_host_lock(card->host);
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cmd.cmd_code = SET_BLOCKLEN;
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cmd.arg = 512;
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cmd.flags = RESP_SPI_R1 | RESP_R1 | CMD_AC;
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err = mmcsd_send_cmd(card->host, &cmd, 5);
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mmcsd_host_unlock(card->host);
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if (err)
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{
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rt_kprintf("MMCSD: unable to set block size to %d: %d\n", cmd.arg, err);
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return -RT_ERROR;
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}
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return 0;
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}
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rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
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{
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rt_int32_t err = 0;
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rt_uint8_t i, status;
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rt_uint8_t *sector;
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char dname[4];
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char sname[8];
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struct mmcsd_blk_device *blk_dev = RT_NULL;
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err = mmcsd_set_blksize(card);
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if(err)
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{
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return err;
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}
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rt_kprintf("probe mmcsd block device!\n");
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/* get the first sector to read partition table */
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sector = (rt_uint8_t *)rt_malloc(SECTOR_SIZE);
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if (sector == RT_NULL)
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{
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rt_kprintf("allocate partition sector buffer failed\n");
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return -RT_ENOMEM;
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}
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status = rt_mmcsd_req_blk(card, 0, sector, 1, 0);
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if (status == RT_EOK)
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{
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for (i = 0; i < RT_MMCSD_MAX_PARTITION; i++)
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{
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blk_dev = rt_calloc(1, sizeof(struct mmcsd_blk_device));
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if (!blk_dev)
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{
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rt_kprintf("mmcsd:malloc memory failed!\n");
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break;
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}
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/* get the first partition */
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status = dfs_filesystem_get_partition(&blk_dev->part, sector, i);
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if (status == RT_EOK)
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{
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rt_snprintf(dname, 4, "sd%d", i);
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rt_snprintf(sname, 8, "sem_sd%d", i);
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blk_dev->part.lock = rt_sem_create(sname, 1, RT_IPC_FLAG_FIFO);
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/* register mmcsd device */
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blk_dev->dev.type = RT_Device_Class_Block;
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blk_dev->dev.init = rt_mmcsd_init;
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blk_dev->dev.open = rt_mmcsd_open;
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blk_dev->dev.close = rt_mmcsd_close;
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blk_dev->dev.read = rt_mmcsd_read;
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blk_dev->dev.write = rt_mmcsd_write;
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blk_dev->dev.control = rt_mmcsd_control;
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blk_dev->dev.user_data = blk_dev;
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blk_dev->card = card;
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blk_dev->geometry.bytes_per_sector = 1<<9;
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blk_dev->geometry.block_size = card->card_blksize;
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blk_dev->geometry.sector_count = blk_dev->part.size;
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rt_device_register(&blk_dev->dev, dname,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
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rt_list_insert_after(&blk_devices, &blk_dev->list);
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}
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else
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{
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if (i == 0)
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{
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/* there is no partition table */
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blk_dev->part.offset = 0;
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blk_dev->part.size = 0;
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blk_dev->part.lock = rt_sem_create("sem_sd0", 1, RT_IPC_FLAG_FIFO);
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/* register mmcsd device */
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blk_dev->dev.type = RT_Device_Class_Block;
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blk_dev->dev.init = rt_mmcsd_init;
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blk_dev->dev.open = rt_mmcsd_open;
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blk_dev->dev.close = rt_mmcsd_close;
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blk_dev->dev.read = rt_mmcsd_read;
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blk_dev->dev.write = rt_mmcsd_write;
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blk_dev->dev.control = rt_mmcsd_control;
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blk_dev->dev.user_data = blk_dev;
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blk_dev->card = card;
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blk_dev->geometry.bytes_per_sector = 1<<9;
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blk_dev->geometry.block_size = card->card_blksize;
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blk_dev->geometry.sector_count =
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card->card_capacity * (1024 / 512);
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rt_device_register(&blk_dev->dev, "sd0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
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rt_list_insert_after(&blk_devices, &blk_dev->list);
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break;
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}
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else
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{
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rt_free(blk_dev);
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blk_dev = RT_NULL;
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break;
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}
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}
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#ifdef RT_USING_DFS_MNTTABLE
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if (0) // if (blk_dev)
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{
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rt_kprintf("try to mount file system!\n");
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/* try to mount file system on this block device */
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dfs_mount_device(&(blk_dev->dev));
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}
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#endif
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}
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}
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else
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{
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rt_kprintf("read mmcsd first sector failed\n");
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err = -RT_ERROR;
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}
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/* release sector buffer */
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rt_free(sector);
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return err;
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}
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void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card)
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{
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rt_list_t *l, *n;
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struct mmcsd_blk_device *blk_dev;
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for (l = (&blk_devices)->next, n = l->next; l != &blk_devices; l = n)
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{
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blk_dev = (struct mmcsd_blk_device *)rt_list_entry(l, struct mmcsd_blk_device, list);
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if (blk_dev->card == card)
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{
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/* unmount file system */
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const char * mounted_path = dfs_filesystem_get_mounted_path(&(blk_dev->dev));
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if (mounted_path)
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{
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dfs_unmount(mounted_path);
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}
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rt_device_unregister(&blk_dev->dev);
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rt_list_remove(&blk_dev->list);
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rt_free(blk_dev);
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}
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}
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}
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/*
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* This function will initialize block device on the mmc/sd.
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*
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* @deprecated since 2.1.0, this function does not need to be invoked
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* in the system initialization.
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*/
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int rt_mmcsd_blk_init(void)
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{
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/* nothing */
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return 0;
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}
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INIT_PREV_EXPORT(rt_mmcsd_blk_init);
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