1584 строки
38 KiB
C
1584 строки
38 KiB
C
/* Realtek PCI-Express SD/MMC Card Interface driver
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*
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* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Wei WANG <wei_wang@realsil.com.cn>
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sd.h>
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#include <linux/mmc/card.h>
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#include <linux/mfd/rtsx_pci.h>
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#include <asm/unaligned.h>
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struct realtek_next {
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unsigned int sg_count;
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s32 cookie;
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};
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struct realtek_pci_sdmmc {
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struct platform_device *pdev;
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struct rtsx_pcr *pcr;
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struct mmc_host *mmc;
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struct mmc_request *mrq;
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struct mmc_command *cmd;
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struct mmc_data *data;
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spinlock_t lock;
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struct timer_list timer;
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struct tasklet_struct cmd_tasklet;
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struct tasklet_struct data_tasklet;
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struct tasklet_struct finish_tasklet;
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u8 rsp_type;
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u8 rsp_len;
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int sg_count;
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u8 ssc_depth;
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unsigned int clock;
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bool vpclk;
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bool double_clk;
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bool eject;
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bool initial_mode;
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int power_state;
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#define SDMMC_POWER_ON 1
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#define SDMMC_POWER_OFF 0
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struct realtek_next next_data;
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};
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static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
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struct mmc_request *mrq);
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static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
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{
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return &(host->pdev->dev);
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}
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static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
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{
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rtsx_pci_write_register(host->pcr, CARD_STOP,
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SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
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}
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#ifdef DEBUG
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static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
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{
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struct rtsx_pcr *pcr = host->pcr;
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u16 i;
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u8 *ptr;
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/* Print SD host internal registers */
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rtsx_pci_init_cmd(pcr);
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for (i = 0xFDA0; i <= 0xFDAE; i++)
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rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
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for (i = 0xFD52; i <= 0xFD69; i++)
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rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
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rtsx_pci_send_cmd(pcr, 100);
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ptr = rtsx_pci_get_cmd_data(pcr);
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for (i = 0xFDA0; i <= 0xFDAE; i++)
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dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
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for (i = 0xFD52; i <= 0xFD69; i++)
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dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
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}
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#else
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#define sd_print_debug_regs(host)
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#endif /* DEBUG */
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static void sd_isr_done_transfer(struct platform_device *pdev)
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{
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struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
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spin_lock(&host->lock);
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if (host->cmd)
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tasklet_schedule(&host->cmd_tasklet);
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if (host->data)
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tasklet_schedule(&host->data_tasklet);
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spin_unlock(&host->lock);
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}
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static void sd_request_timeout(unsigned long host_addr)
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{
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struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
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unsigned long flags;
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spin_lock_irqsave(&host->lock, flags);
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if (!host->mrq) {
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dev_err(sdmmc_dev(host), "error: no request exist\n");
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goto out;
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}
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if (host->cmd)
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host->cmd->error = -ETIMEDOUT;
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if (host->data)
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host->data->error = -ETIMEDOUT;
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dev_dbg(sdmmc_dev(host), "timeout for request\n");
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out:
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tasklet_schedule(&host->finish_tasklet);
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spin_unlock_irqrestore(&host->lock, flags);
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}
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static void sd_finish_request(unsigned long host_addr)
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{
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struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
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struct rtsx_pcr *pcr = host->pcr;
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struct mmc_request *mrq;
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struct mmc_command *cmd;
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struct mmc_data *data;
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unsigned long flags;
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bool any_error;
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spin_lock_irqsave(&host->lock, flags);
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del_timer(&host->timer);
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mrq = host->mrq;
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if (!mrq) {
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dev_err(sdmmc_dev(host), "error: no request need finish\n");
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goto out;
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}
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cmd = mrq->cmd;
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data = mrq->data;
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any_error = (mrq->sbc && mrq->sbc->error) ||
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(mrq->stop && mrq->stop->error) ||
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(cmd && cmd->error) || (data && data->error);
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if (any_error) {
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rtsx_pci_stop_cmd(pcr);
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sd_clear_error(host);
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}
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if (data) {
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if (any_error)
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data->bytes_xfered = 0;
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else
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data->bytes_xfered = data->blocks * data->blksz;
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if (!data->host_cookie)
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rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len,
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data->flags & MMC_DATA_READ);
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}
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host->mrq = NULL;
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host->cmd = NULL;
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host->data = NULL;
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out:
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spin_unlock_irqrestore(&host->lock, flags);
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mutex_unlock(&pcr->pcr_mutex);
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mmc_request_done(host->mmc, mrq);
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}
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static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
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u8 *buf, int buf_len, int timeout)
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{
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struct rtsx_pcr *pcr = host->pcr;
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int err, i;
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u8 trans_mode;
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dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__, cmd[0] - 0x40);
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if (!buf)
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buf_len = 0;
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if ((cmd[0] & 0x3F) == MMC_SEND_TUNING_BLOCK)
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trans_mode = SD_TM_AUTO_TUNING;
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else
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trans_mode = SD_TM_NORMAL_READ;
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rtsx_pci_init_cmd(pcr);
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for (i = 0; i < 5; i++)
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0 + i, 0xFF, cmd[i]);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
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0xFF, (u8)(byte_cnt >> 8));
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
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SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
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SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
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if (trans_mode != SD_TM_AUTO_TUNING)
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
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CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
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0xFF, trans_mode | SD_TRANSFER_START);
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rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
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SD_TRANSFER_END, SD_TRANSFER_END);
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err = rtsx_pci_send_cmd(pcr, timeout);
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if (err < 0) {
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sd_print_debug_regs(host);
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dev_dbg(sdmmc_dev(host),
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"rtsx_pci_send_cmd fail (err = %d)\n", err);
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return err;
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}
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if (buf && buf_len) {
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err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
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if (err < 0) {
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dev_dbg(sdmmc_dev(host),
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"rtsx_pci_read_ppbuf fail (err = %d)\n", err);
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return err;
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}
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}
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return 0;
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}
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static int sd_write_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
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u8 *buf, int buf_len, int timeout)
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{
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struct rtsx_pcr *pcr = host->pcr;
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int err, i;
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u8 trans_mode;
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if (!buf)
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buf_len = 0;
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if (buf && buf_len) {
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err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
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if (err < 0) {
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dev_dbg(sdmmc_dev(host),
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"rtsx_pci_write_ppbuf fail (err = %d)\n", err);
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return err;
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}
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}
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trans_mode = cmd ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
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rtsx_pci_init_cmd(pcr);
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if (cmd) {
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dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d\n", __func__,
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cmd[0] - 0x40);
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for (i = 0; i < 5; i++)
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
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SD_CMD0 + i, 0xFF, cmd[i]);
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}
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
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0xFF, (u8)(byte_cnt >> 8));
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
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SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
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SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
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trans_mode | SD_TRANSFER_START);
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rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
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SD_TRANSFER_END, SD_TRANSFER_END);
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err = rtsx_pci_send_cmd(pcr, timeout);
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if (err < 0) {
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sd_print_debug_regs(host);
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dev_dbg(sdmmc_dev(host),
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"rtsx_pci_send_cmd fail (err = %d)\n", err);
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return err;
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}
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return 0;
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}
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static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
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{
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struct rtsx_pcr *pcr = host->pcr;
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u8 cmd_idx = (u8)cmd->opcode;
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u32 arg = cmd->arg;
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int err = 0;
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int timeout = 100;
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int i;
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u8 rsp_type;
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int rsp_len = 5;
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unsigned long flags;
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if (host->cmd)
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dev_err(sdmmc_dev(host), "error: cmd already exist\n");
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host->cmd = cmd;
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dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
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__func__, cmd_idx, arg);
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/* Response type:
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* R0
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* R1, R5, R6, R7
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* R1b
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* R2
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* R3, R4
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*/
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switch (mmc_resp_type(cmd)) {
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case MMC_RSP_NONE:
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rsp_type = SD_RSP_TYPE_R0;
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rsp_len = 0;
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break;
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case MMC_RSP_R1:
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rsp_type = SD_RSP_TYPE_R1;
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break;
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case MMC_RSP_R1B:
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rsp_type = SD_RSP_TYPE_R1b;
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break;
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case MMC_RSP_R2:
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rsp_type = SD_RSP_TYPE_R2;
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rsp_len = 16;
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break;
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case MMC_RSP_R3:
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rsp_type = SD_RSP_TYPE_R3;
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break;
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default:
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dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
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err = -EINVAL;
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goto out;
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}
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host->rsp_type = rsp_type;
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host->rsp_len = rsp_len;
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if (rsp_type == SD_RSP_TYPE_R1b)
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timeout = 3000;
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if (cmd->opcode == SD_SWITCH_VOLTAGE) {
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err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
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0xFF, SD_CLK_TOGGLE_EN);
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if (err < 0)
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goto out;
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}
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rtsx_pci_init_cmd(pcr);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
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0x01, PINGPONG_BUFFER);
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rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
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0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
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rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
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SD_TRANSFER_END | SD_STAT_IDLE,
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SD_TRANSFER_END | SD_STAT_IDLE);
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if (rsp_type == SD_RSP_TYPE_R2) {
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/* Read data from ping-pong buffer */
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for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
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rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
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} else if (rsp_type != SD_RSP_TYPE_R0) {
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/* Read data from SD_CMDx registers */
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for (i = SD_CMD0; i <= SD_CMD4; i++)
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rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
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}
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rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
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mod_timer(&host->timer, jiffies + msecs_to_jiffies(timeout));
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spin_lock_irqsave(&pcr->lock, flags);
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pcr->trans_result = TRANS_NOT_READY;
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rtsx_pci_send_cmd_no_wait(pcr);
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spin_unlock_irqrestore(&pcr->lock, flags);
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return;
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out:
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cmd->error = err;
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tasklet_schedule(&host->finish_tasklet);
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}
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static void sd_get_rsp(unsigned long host_addr)
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{
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struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
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struct rtsx_pcr *pcr = host->pcr;
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struct mmc_command *cmd;
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int i, err = 0, stat_idx;
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u8 *ptr, rsp_type;
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unsigned long flags;
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spin_lock_irqsave(&host->lock, flags);
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cmd = host->cmd;
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host->cmd = NULL;
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if (!cmd) {
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dev_err(sdmmc_dev(host), "error: cmd not exist\n");
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goto out;
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}
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spin_lock(&pcr->lock);
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if (pcr->trans_result == TRANS_NO_DEVICE)
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err = -ENODEV;
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else if (pcr->trans_result != TRANS_RESULT_OK)
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err = -EINVAL;
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spin_unlock(&pcr->lock);
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if (err < 0)
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goto out;
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rsp_type = host->rsp_type;
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stat_idx = host->rsp_len;
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if (rsp_type == SD_RSP_TYPE_R0) {
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err = 0;
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goto out;
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}
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/* Eliminate returned value of CHECK_REG_CMD */
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ptr = rtsx_pci_get_cmd_data(pcr) + 1;
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/* Check (Start,Transmission) bit of Response */
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if ((ptr[0] & 0xC0) != 0) {
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err = -EILSEQ;
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dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
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goto out;
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}
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/* Check CRC7 */
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if (!(rsp_type & SD_NO_CHECK_CRC7)) {
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if (ptr[stat_idx] & SD_CRC7_ERR) {
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err = -EILSEQ;
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dev_dbg(sdmmc_dev(host), "CRC7 error\n");
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goto out;
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}
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}
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|
|
if (rsp_type == SD_RSP_TYPE_R2) {
|
|
for (i = 0; i < 4; i++) {
|
|
cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
|
|
dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
|
|
i, cmd->resp[i]);
|
|
}
|
|
} else {
|
|
cmd->resp[0] = get_unaligned_be32(ptr + 1);
|
|
dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
|
|
cmd->resp[0]);
|
|
}
|
|
|
|
if (cmd == host->mrq->sbc) {
|
|
sd_send_cmd(host, host->mrq->cmd);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
return;
|
|
}
|
|
|
|
if (cmd == host->mrq->stop)
|
|
goto out;
|
|
|
|
if (cmd->data) {
|
|
sd_start_multi_rw(host, host->mrq);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
return;
|
|
}
|
|
|
|
out:
|
|
cmd->error = err;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
|
|
struct mmc_data *data, struct realtek_next *next)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int read = data->flags & MMC_DATA_READ;
|
|
int sg_count = 0;
|
|
|
|
if (!next && data->host_cookie &&
|
|
data->host_cookie != host->next_data.cookie) {
|
|
dev_err(sdmmc_dev(host),
|
|
"error: invalid cookie data[%d] host[%d]\n",
|
|
data->host_cookie, host->next_data.cookie);
|
|
data->host_cookie = 0;
|
|
}
|
|
|
|
if (next || (!next && data->host_cookie != host->next_data.cookie))
|
|
sg_count = rtsx_pci_dma_map_sg(pcr,
|
|
data->sg, data->sg_len, read);
|
|
else
|
|
sg_count = host->next_data.sg_count;
|
|
|
|
if (next) {
|
|
next->sg_count = sg_count;
|
|
if (++next->cookie < 0)
|
|
next->cookie = 1;
|
|
data->host_cookie = next->cookie;
|
|
}
|
|
|
|
return sg_count;
|
|
}
|
|
|
|
static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
|
|
bool is_first_req)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct mmc_data *data = mrq->data;
|
|
|
|
if (data->host_cookie) {
|
|
dev_err(sdmmc_dev(host),
|
|
"error: descard already cookie data[%d]\n",
|
|
data->host_cookie);
|
|
data->host_cookie = 0;
|
|
}
|
|
|
|
dev_dbg(sdmmc_dev(host), "dma sg prepared: %d\n",
|
|
sd_pre_dma_transfer(host, data, &host->next_data));
|
|
}
|
|
|
|
static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
|
|
int err)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
struct mmc_data *data = mrq->data;
|
|
int read = data->flags & MMC_DATA_READ;
|
|
|
|
rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
|
|
data->host_cookie = 0;
|
|
}
|
|
|
|
static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
|
|
struct mmc_request *mrq)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
struct mmc_host *mmc = host->mmc;
|
|
struct mmc_card *card = mmc->card;
|
|
struct mmc_data *data = mrq->data;
|
|
int uhs = mmc_card_uhs(card);
|
|
int read = data->flags & MMC_DATA_READ;
|
|
u8 cfg2, trans_mode;
|
|
int err;
|
|
size_t data_len = data->blksz * data->blocks;
|
|
|
|
if (host->data)
|
|
dev_err(sdmmc_dev(host), "error: data already exist\n");
|
|
|
|
host->data = data;
|
|
|
|
if (read) {
|
|
cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
|
|
SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
|
|
trans_mode = SD_TM_AUTO_READ_3;
|
|
} else {
|
|
cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
|
|
SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
|
|
trans_mode = SD_TM_AUTO_WRITE_3;
|
|
}
|
|
|
|
if (!uhs)
|
|
cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
|
|
|
|
rtsx_pci_init_cmd(pcr);
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
|
|
0xFF, (u8)data->blocks);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
|
|
0xFF, (u8)(data->blocks >> 8));
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
|
|
DMA_DONE_INT, DMA_DONE_INT);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
|
|
0xFF, (u8)(data_len >> 24));
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
|
|
0xFF, (u8)(data_len >> 16));
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
|
|
0xFF, (u8)(data_len >> 8));
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
|
|
if (read) {
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
|
|
0x03 | DMA_PACK_SIZE_MASK,
|
|
DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
|
|
} else {
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
|
|
0x03 | DMA_PACK_SIZE_MASK,
|
|
DMA_DIR_TO_CARD | DMA_EN | DMA_512);
|
|
}
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
|
|
0x01, RING_BUFFER);
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
|
|
trans_mode | SD_TRANSFER_START);
|
|
rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
|
|
SD_TRANSFER_END, SD_TRANSFER_END);
|
|
|
|
mod_timer(&host->timer, jiffies + 10 * HZ);
|
|
rtsx_pci_send_cmd_no_wait(pcr);
|
|
|
|
err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read);
|
|
if (err < 0) {
|
|
data->error = err;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void sd_finish_multi_rw(unsigned long host_addr)
|
|
{
|
|
struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
struct mmc_data *data;
|
|
int err = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
if (!host->data) {
|
|
dev_err(sdmmc_dev(host), "error: no data exist\n");
|
|
goto out;
|
|
}
|
|
|
|
data = host->data;
|
|
host->data = NULL;
|
|
|
|
if (pcr->trans_result == TRANS_NO_DEVICE)
|
|
err = -ENODEV;
|
|
else if (pcr->trans_result != TRANS_RESULT_OK)
|
|
err = -EINVAL;
|
|
|
|
if (err < 0) {
|
|
data->error = err;
|
|
goto out;
|
|
}
|
|
|
|
if (!host->mrq->sbc && data->stop) {
|
|
sd_send_cmd(host, data->stop);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
return;
|
|
}
|
|
|
|
out:
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
|
|
{
|
|
rtsx_pci_write_register(host->pcr, SD_CFG1,
|
|
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
|
|
}
|
|
|
|
static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
|
|
{
|
|
rtsx_pci_write_register(host->pcr, SD_CFG1,
|
|
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
|
|
}
|
|
|
|
static void sd_normal_rw(struct realtek_pci_sdmmc *host,
|
|
struct mmc_request *mrq)
|
|
{
|
|
struct mmc_command *cmd = mrq->cmd;
|
|
struct mmc_data *data = mrq->data;
|
|
u8 _cmd[5], *buf;
|
|
|
|
_cmd[0] = 0x40 | (u8)cmd->opcode;
|
|
put_unaligned_be32(cmd->arg, (u32 *)(&_cmd[1]));
|
|
|
|
buf = kzalloc(data->blksz, GFP_NOIO);
|
|
if (!buf) {
|
|
cmd->error = -ENOMEM;
|
|
return;
|
|
}
|
|
|
|
if (data->flags & MMC_DATA_READ) {
|
|
if (host->initial_mode)
|
|
sd_disable_initial_mode(host);
|
|
|
|
cmd->error = sd_read_data(host, _cmd, (u16)data->blksz, buf,
|
|
data->blksz, 200);
|
|
|
|
if (host->initial_mode)
|
|
sd_enable_initial_mode(host);
|
|
|
|
sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
|
|
} else {
|
|
sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
|
|
|
|
cmd->error = sd_write_data(host, _cmd, (u16)data->blksz, buf,
|
|
data->blksz, 200);
|
|
}
|
|
|
|
kfree(buf);
|
|
}
|
|
|
|
static int sd_change_phase(struct realtek_pci_sdmmc *host,
|
|
u8 sample_point, bool rx)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err;
|
|
|
|
dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
|
|
__func__, rx ? "RX" : "TX", sample_point);
|
|
|
|
rtsx_pci_init_cmd(pcr);
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
|
|
if (rx)
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
|
|
SD_VPRX_CTL, 0x1F, sample_point);
|
|
else
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
|
|
SD_VPTX_CTL, 0x1F, sample_point);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
|
|
PHASE_NOT_RESET, PHASE_NOT_RESET);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
|
|
|
|
err = rtsx_pci_send_cmd(pcr, 100);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
|
|
{
|
|
bit %= RTSX_PHASE_MAX;
|
|
return phase_map & (1 << bit);
|
|
}
|
|
|
|
static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < RTSX_PHASE_MAX; i++) {
|
|
if (test_phase_bit(phase_map, start_bit + i) == 0)
|
|
return i;
|
|
}
|
|
return RTSX_PHASE_MAX;
|
|
}
|
|
|
|
static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
|
|
{
|
|
int start = 0, len = 0;
|
|
int start_final = 0, len_final = 0;
|
|
u8 final_phase = 0xFF;
|
|
|
|
if (phase_map == 0) {
|
|
dev_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
|
|
return final_phase;
|
|
}
|
|
|
|
while (start < RTSX_PHASE_MAX) {
|
|
len = sd_get_phase_len(phase_map, start);
|
|
if (len_final < len) {
|
|
start_final = start;
|
|
len_final = len;
|
|
}
|
|
start += len ? len : 1;
|
|
}
|
|
|
|
final_phase = (start_final + len_final / 2) % RTSX_PHASE_MAX;
|
|
dev_dbg(sdmmc_dev(host), "phase: [map:%x] [maxlen:%d] [final:%d]\n",
|
|
phase_map, len_final, final_phase);
|
|
|
|
return final_phase;
|
|
}
|
|
|
|
static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
|
|
{
|
|
int err, i;
|
|
u8 val = 0;
|
|
|
|
for (i = 0; i < 100; i++) {
|
|
err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
|
|
if (val & SD_DATA_IDLE)
|
|
return;
|
|
|
|
udelay(100);
|
|
}
|
|
}
|
|
|
|
static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
|
|
u8 opcode, u8 sample_point)
|
|
{
|
|
int err;
|
|
u8 cmd[5] = {0};
|
|
|
|
err = sd_change_phase(host, sample_point, true);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
cmd[0] = 0x40 | opcode;
|
|
err = sd_read_data(host, cmd, 0x40, NULL, 0, 100);
|
|
if (err < 0) {
|
|
/* Wait till SD DATA IDLE */
|
|
sd_wait_data_idle(host);
|
|
sd_clear_error(host);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
|
|
u8 opcode, u32 *phase_map)
|
|
{
|
|
int err, i;
|
|
u32 raw_phase_map = 0;
|
|
|
|
for (i = 0; i < RTSX_PHASE_MAX; i++) {
|
|
err = sd_tuning_rx_cmd(host, opcode, (u8)i);
|
|
if (err == 0)
|
|
raw_phase_map |= 1 << i;
|
|
}
|
|
|
|
if (phase_map)
|
|
*phase_map = raw_phase_map;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
|
|
{
|
|
int err, i;
|
|
u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
|
|
u8 final_phase;
|
|
|
|
for (i = 0; i < RX_TUNING_CNT; i++) {
|
|
err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (raw_phase_map[i] == 0)
|
|
break;
|
|
}
|
|
|
|
phase_map = 0xFFFFFFFF;
|
|
for (i = 0; i < RX_TUNING_CNT; i++) {
|
|
dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
|
|
i, raw_phase_map[i]);
|
|
phase_map &= raw_phase_map[i];
|
|
}
|
|
dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\n", phase_map);
|
|
|
|
if (phase_map) {
|
|
final_phase = sd_search_final_phase(host, phase_map);
|
|
if (final_phase == 0xFF)
|
|
return -EINVAL;
|
|
|
|
err = sd_change_phase(host, final_phase, true);
|
|
if (err < 0)
|
|
return err;
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline bool sd_use_muti_rw(struct mmc_command *cmd)
|
|
{
|
|
return mmc_op_multi(cmd->opcode) ||
|
|
(cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
|
|
(cmd->opcode == MMC_WRITE_BLOCK);
|
|
}
|
|
|
|
static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
struct mmc_command *cmd = mrq->cmd;
|
|
struct mmc_data *data = mrq->data;
|
|
unsigned int data_size = 0;
|
|
int err;
|
|
unsigned long flags;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
if (host->mrq)
|
|
dev_err(sdmmc_dev(host), "error: request already exist\n");
|
|
host->mrq = mrq;
|
|
|
|
if (host->eject) {
|
|
cmd->error = -ENOMEDIUM;
|
|
goto finish;
|
|
}
|
|
|
|
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
|
|
if (err) {
|
|
cmd->error = err;
|
|
goto finish;
|
|
}
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
|
|
host->initial_mode, host->double_clk, host->vpclk);
|
|
rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
|
|
rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
|
|
CARD_SHARE_MASK, CARD_SHARE_48_SD);
|
|
|
|
if (mrq->data)
|
|
data_size = data->blocks * data->blksz;
|
|
|
|
if (sd_use_muti_rw(cmd))
|
|
host->sg_count = sd_pre_dma_transfer(host, data, NULL);
|
|
|
|
if (!data_size || sd_use_muti_rw(cmd)) {
|
|
if (mrq->sbc)
|
|
sd_send_cmd(host, mrq->sbc);
|
|
else
|
|
sd_send_cmd(host, cmd);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
} else {
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
sd_normal_rw(host, mrq);
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
return;
|
|
|
|
finish:
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
|
|
unsigned char bus_width)
|
|
{
|
|
int err = 0;
|
|
u8 width[] = {
|
|
[MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
|
|
[MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
|
|
[MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
|
|
};
|
|
|
|
if (bus_width <= MMC_BUS_WIDTH_8)
|
|
err = rtsx_pci_write_register(host->pcr, SD_CFG1,
|
|
0x03, width[bus_width]);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sd_power_on(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err;
|
|
|
|
if (host->power_state == SDMMC_POWER_ON)
|
|
return 0;
|
|
|
|
rtsx_pci_init_cmd(pcr);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
|
|
CARD_SHARE_MASK, CARD_SHARE_48_SD);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
|
|
SD_CLK_EN, SD_CLK_EN);
|
|
err = rtsx_pci_send_cmd(pcr, 100);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
host->power_state = SDMMC_POWER_ON;
|
|
return 0;
|
|
}
|
|
|
|
static int sd_power_off(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err;
|
|
|
|
host->power_state = SDMMC_POWER_OFF;
|
|
|
|
rtsx_pci_init_cmd(pcr);
|
|
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
|
|
|
|
err = rtsx_pci_send_cmd(pcr, 100);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
|
|
}
|
|
|
|
static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
|
|
unsigned char power_mode)
|
|
{
|
|
int err;
|
|
|
|
if (power_mode == MMC_POWER_OFF)
|
|
err = sd_power_off(host);
|
|
else
|
|
err = sd_power_on(host);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err = 0;
|
|
|
|
rtsx_pci_init_cmd(pcr);
|
|
|
|
switch (timing) {
|
|
case MMC_TIMING_UHS_SDR104:
|
|
case MMC_TIMING_UHS_SDR50:
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
|
|
0x0C | SD_ASYNC_FIFO_NOT_RST,
|
|
SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
|
|
CLK_LOW_FREQ, CLK_LOW_FREQ);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
|
|
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
|
|
break;
|
|
|
|
case MMC_TIMING_UHS_DDR50:
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
|
|
0x0C | SD_ASYNC_FIFO_NOT_RST,
|
|
SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
|
|
CLK_LOW_FREQ, CLK_LOW_FREQ);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
|
|
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
|
|
DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
|
|
DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
|
|
DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
|
|
break;
|
|
|
|
case MMC_TIMING_MMC_HS:
|
|
case MMC_TIMING_SD_HS:
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
|
|
0x0C, SD_20_MODE);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
|
|
CLK_LOW_FREQ, CLK_LOW_FREQ);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
|
|
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
|
|
SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
|
|
SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
|
|
break;
|
|
|
|
default:
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
|
|
SD_CFG1, 0x0C, SD_20_MODE);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
|
|
CLK_LOW_FREQ, CLK_LOW_FREQ);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
|
|
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
|
|
SD_PUSH_POINT_CTL, 0xFF, 0);
|
|
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
|
|
SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
|
|
break;
|
|
}
|
|
|
|
err = rtsx_pci_send_cmd(pcr, 100);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
|
|
if (host->eject)
|
|
return;
|
|
|
|
if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
|
|
return;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
sd_set_bus_width(host, ios->bus_width);
|
|
sd_set_power_mode(host, ios->power_mode);
|
|
sd_set_timing(host, ios->timing);
|
|
|
|
host->vpclk = false;
|
|
host->double_clk = true;
|
|
|
|
switch (ios->timing) {
|
|
case MMC_TIMING_UHS_SDR104:
|
|
case MMC_TIMING_UHS_SDR50:
|
|
host->ssc_depth = RTSX_SSC_DEPTH_2M;
|
|
host->vpclk = true;
|
|
host->double_clk = false;
|
|
break;
|
|
case MMC_TIMING_UHS_DDR50:
|
|
case MMC_TIMING_UHS_SDR25:
|
|
host->ssc_depth = RTSX_SSC_DEPTH_1M;
|
|
break;
|
|
default:
|
|
host->ssc_depth = RTSX_SSC_DEPTH_500K;
|
|
break;
|
|
}
|
|
|
|
host->initial_mode = (ios->clock <= 1000000) ? true : false;
|
|
|
|
host->clock = ios->clock;
|
|
rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
|
|
host->initial_mode, host->double_clk, host->vpclk);
|
|
|
|
mutex_unlock(&pcr->pcr_mutex);
|
|
}
|
|
|
|
static int sdmmc_get_ro(struct mmc_host *mmc)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int ro = 0;
|
|
u32 val;
|
|
|
|
if (host->eject)
|
|
return -ENOMEDIUM;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
/* Check SD mechanical write-protect switch */
|
|
val = rtsx_pci_readl(pcr, RTSX_BIPR);
|
|
dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
|
|
if (val & SD_WRITE_PROTECT)
|
|
ro = 1;
|
|
|
|
mutex_unlock(&pcr->pcr_mutex);
|
|
|
|
return ro;
|
|
}
|
|
|
|
static int sdmmc_get_cd(struct mmc_host *mmc)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int cd = 0;
|
|
u32 val;
|
|
|
|
if (host->eject)
|
|
return -ENOMEDIUM;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
/* Check SD card detect */
|
|
val = rtsx_pci_card_exist(pcr);
|
|
dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
|
|
if (val & SD_EXIST)
|
|
cd = 1;
|
|
|
|
mutex_unlock(&pcr->pcr_mutex);
|
|
|
|
return cd;
|
|
}
|
|
|
|
static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err;
|
|
u8 stat;
|
|
|
|
/* Reference to Signal Voltage Switch Sequence in SD spec.
|
|
* Wait for a period of time so that the card can drive SD_CMD and
|
|
* SD_DAT[3:0] to low after sending back CMD11 response.
|
|
*/
|
|
mdelay(1);
|
|
|
|
/* SD_CMD, SD_DAT[3:0] should be driven to low by card;
|
|
* If either one of SD_CMD,SD_DAT[3:0] is not low,
|
|
* abort the voltage switch sequence;
|
|
*/
|
|
err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
|
|
SD_DAT1_STATUS | SD_DAT0_STATUS))
|
|
return -EINVAL;
|
|
|
|
/* Stop toggle SD clock */
|
|
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
|
|
0xFF, SD_CLK_FORCE_STOP);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err;
|
|
u8 stat, mask, val;
|
|
|
|
/* Wait 1.8V output of voltage regulator in card stable */
|
|
msleep(50);
|
|
|
|
/* Toggle SD clock again */
|
|
err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* Wait for a period of time so that the card can drive
|
|
* SD_DAT[3:0] to high at 1.8V
|
|
*/
|
|
msleep(20);
|
|
|
|
/* SD_CMD, SD_DAT[3:0] should be pulled high by host */
|
|
err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
|
|
SD_DAT1_STATUS | SD_DAT0_STATUS;
|
|
val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
|
|
SD_DAT1_STATUS | SD_DAT0_STATUS;
|
|
if ((stat & mask) != val) {
|
|
dev_dbg(sdmmc_dev(host),
|
|
"%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
|
|
rtsx_pci_write_register(pcr, SD_BUS_STAT,
|
|
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
|
|
rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err = 0;
|
|
u8 voltage;
|
|
|
|
dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
|
|
__func__, ios->signal_voltage);
|
|
|
|
if (host->eject)
|
|
return -ENOMEDIUM;
|
|
|
|
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
|
|
voltage = OUTPUT_3V3;
|
|
else
|
|
voltage = OUTPUT_1V8;
|
|
|
|
if (voltage == OUTPUT_1V8) {
|
|
err = sd_wait_voltage_stable_1(host);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
|
|
err = rtsx_pci_switch_output_voltage(pcr, voltage);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
if (voltage == OUTPUT_1V8) {
|
|
err = sd_wait_voltage_stable_2(host);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
/* Stop toggle SD clock in idle */
|
|
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
|
|
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
|
|
|
|
mutex_unlock(&pcr->pcr_mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
|
|
{
|
|
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
int err = 0;
|
|
|
|
if (host->eject)
|
|
return -ENOMEDIUM;
|
|
|
|
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&pcr->pcr_mutex);
|
|
|
|
rtsx_pci_start_run(pcr);
|
|
|
|
/* Set initial TX phase */
|
|
switch (mmc->ios.timing) {
|
|
case MMC_TIMING_UHS_SDR104:
|
|
err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
|
|
break;
|
|
|
|
case MMC_TIMING_UHS_SDR50:
|
|
err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
|
|
break;
|
|
|
|
case MMC_TIMING_UHS_DDR50:
|
|
err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
|
|
break;
|
|
|
|
default:
|
|
err = 0;
|
|
}
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Tuning RX phase */
|
|
if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
|
|
(mmc->ios.timing == MMC_TIMING_UHS_SDR50))
|
|
err = sd_tuning_rx(host, opcode);
|
|
else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
|
|
err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
|
|
|
|
out:
|
|
mutex_unlock(&pcr->pcr_mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
|
|
.pre_req = sdmmc_pre_req,
|
|
.post_req = sdmmc_post_req,
|
|
.request = sdmmc_request,
|
|
.set_ios = sdmmc_set_ios,
|
|
.get_ro = sdmmc_get_ro,
|
|
.get_cd = sdmmc_get_cd,
|
|
.start_signal_voltage_switch = sdmmc_switch_voltage,
|
|
.execute_tuning = sdmmc_execute_tuning,
|
|
};
|
|
|
|
static void init_extra_caps(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct mmc_host *mmc = host->mmc;
|
|
struct rtsx_pcr *pcr = host->pcr;
|
|
|
|
dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
|
|
|
|
if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
|
|
mmc->caps |= MMC_CAP_UHS_SDR50;
|
|
if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
|
|
mmc->caps |= MMC_CAP_UHS_SDR104;
|
|
if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
|
|
mmc->caps |= MMC_CAP_UHS_DDR50;
|
|
if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
|
|
mmc->caps |= MMC_CAP_1_8V_DDR;
|
|
if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
|
|
mmc->caps |= MMC_CAP_8_BIT_DATA;
|
|
}
|
|
|
|
static void realtek_init_host(struct realtek_pci_sdmmc *host)
|
|
{
|
|
struct mmc_host *mmc = host->mmc;
|
|
|
|
mmc->f_min = 250000;
|
|
mmc->f_max = 208000000;
|
|
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
|
|
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
|
|
MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
|
|
MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
|
|
mmc->max_current_330 = 400;
|
|
mmc->max_current_180 = 800;
|
|
mmc->ops = &realtek_pci_sdmmc_ops;
|
|
|
|
init_extra_caps(host);
|
|
|
|
mmc->max_segs = 256;
|
|
mmc->max_seg_size = 65536;
|
|
mmc->max_blk_size = 512;
|
|
mmc->max_blk_count = 65535;
|
|
mmc->max_req_size = 524288;
|
|
}
|
|
|
|
static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
|
|
{
|
|
struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
|
|
|
|
mmc_detect_change(host->mmc, 0);
|
|
}
|
|
|
|
static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct mmc_host *mmc;
|
|
struct realtek_pci_sdmmc *host;
|
|
struct rtsx_pcr *pcr;
|
|
struct pcr_handle *handle = pdev->dev.platform_data;
|
|
unsigned long host_addr;
|
|
|
|
if (!handle)
|
|
return -ENXIO;
|
|
|
|
pcr = handle->pcr;
|
|
if (!pcr)
|
|
return -ENXIO;
|
|
|
|
dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
|
|
|
|
mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
host = mmc_priv(mmc);
|
|
host->pcr = pcr;
|
|
host->mmc = mmc;
|
|
host->pdev = pdev;
|
|
host->power_state = SDMMC_POWER_OFF;
|
|
platform_set_drvdata(pdev, host);
|
|
pcr->slots[RTSX_SD_CARD].p_dev = pdev;
|
|
pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
|
|
|
|
host_addr = (unsigned long)host;
|
|
host->next_data.cookie = 1;
|
|
setup_timer(&host->timer, sd_request_timeout, host_addr);
|
|
tasklet_init(&host->cmd_tasklet, sd_get_rsp, host_addr);
|
|
tasklet_init(&host->data_tasklet, sd_finish_multi_rw, host_addr);
|
|
tasklet_init(&host->finish_tasklet, sd_finish_request, host_addr);
|
|
spin_lock_init(&host->lock);
|
|
|
|
pcr->slots[RTSX_SD_CARD].done_transfer = sd_isr_done_transfer;
|
|
realtek_init_host(host);
|
|
|
|
mmc_add_host(mmc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
|
|
struct rtsx_pcr *pcr;
|
|
struct mmc_host *mmc;
|
|
struct mmc_request *mrq;
|
|
unsigned long flags;
|
|
|
|
if (!host)
|
|
return 0;
|
|
|
|
pcr = host->pcr;
|
|
pcr->slots[RTSX_SD_CARD].p_dev = NULL;
|
|
pcr->slots[RTSX_SD_CARD].card_event = NULL;
|
|
pcr->slots[RTSX_SD_CARD].done_transfer = NULL;
|
|
mmc = host->mmc;
|
|
mrq = host->mrq;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
if (host->mrq) {
|
|
dev_dbg(&(pdev->dev),
|
|
"%s: Controller removed during transfer\n",
|
|
mmc_hostname(mmc));
|
|
|
|
if (mrq->sbc)
|
|
mrq->sbc->error = -ENOMEDIUM;
|
|
if (mrq->cmd)
|
|
mrq->cmd->error = -ENOMEDIUM;
|
|
if (mrq->stop)
|
|
mrq->stop->error = -ENOMEDIUM;
|
|
if (mrq->data)
|
|
mrq->data->error = -ENOMEDIUM;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
del_timer_sync(&host->timer);
|
|
tasklet_kill(&host->cmd_tasklet);
|
|
tasklet_kill(&host->data_tasklet);
|
|
tasklet_kill(&host->finish_tasklet);
|
|
|
|
mmc_remove_host(mmc);
|
|
host->eject = true;
|
|
|
|
mmc_free_host(mmc);
|
|
|
|
dev_dbg(&(pdev->dev),
|
|
": Realtek PCI-E SDMMC controller has been removed\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device_id rtsx_pci_sdmmc_ids[] = {
|
|
{
|
|
.name = DRV_NAME_RTSX_PCI_SDMMC,
|
|
}, {
|
|
/* sentinel */
|
|
}
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
|
|
|
|
static struct platform_driver rtsx_pci_sdmmc_driver = {
|
|
.probe = rtsx_pci_sdmmc_drv_probe,
|
|
.remove = rtsx_pci_sdmmc_drv_remove,
|
|
.id_table = rtsx_pci_sdmmc_ids,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRV_NAME_RTSX_PCI_SDMMC,
|
|
},
|
|
};
|
|
module_platform_driver(rtsx_pci_sdmmc_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
|
|
MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");
|