diff options
Diffstat (limited to 'drivers/mmc/host/rtsx_usb_sdmmc.c')
| -rw-r--r-- | drivers/mmc/host/rtsx_usb_sdmmc.c | 1456 |
1 files changed, 1456 insertions, 0 deletions
diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c new file mode 100644 index 00000000000..5d3766e792f --- /dev/null +++ b/drivers/mmc/host/rtsx_usb_sdmmc.c @@ -0,0 +1,1456 @@ +/* Realtek USB SD/MMC Card Interface driver + * + * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Author: + * Roger Tseng <rogerable@realtek.com> + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/usb.h> +#include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sd.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/card.h> +#include <linux/scatterlist.h> +#include <linux/pm_runtime.h> + +#include <linux/mfd/rtsx_usb.h> +#include <asm/unaligned.h> + +#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ + defined(CONFIG_MMC_REALTEK_USB_MODULE)) +#include <linux/leds.h> +#include <linux/workqueue.h> +#define RTSX_USB_USE_LEDS_CLASS +#endif + +struct rtsx_usb_sdmmc { + struct platform_device *pdev; + struct rtsx_ucr *ucr; + struct mmc_host *mmc; + struct mmc_request *mrq; + + struct mutex host_mutex; + + u8 ssc_depth; + unsigned int clock; + bool vpclk; + bool double_clk; + bool host_removal; + bool card_exist; + bool initial_mode; + bool ddr_mode; + + unsigned char power_mode; + +#ifdef RTSX_USB_USE_LEDS_CLASS + struct led_classdev led; + char led_name[32]; + struct work_struct led_work; +#endif +}; + +static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host) +{ + return &(host->pdev->dev); +} + +static inline void sd_clear_error(struct rtsx_usb_sdmmc *host) +{ + struct rtsx_ucr *ucr = host->ucr; + rtsx_usb_ep0_write_register(ucr, CARD_STOP, + SD_STOP | SD_CLR_ERR, + SD_STOP | SD_CLR_ERR); + + rtsx_usb_clear_dma_err(ucr); + rtsx_usb_clear_fsm_err(ucr); +} + +#ifdef DEBUG +static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host) +{ + struct rtsx_ucr *ucr = host->ucr; + u8 val = 0; + + rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val); + dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val); + rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val); + dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val); + rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val); + dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val); +} +#else +#define sd_print_debug_regs(host) +#endif /* DEBUG */ + +static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, + u16 byte_cnt, u8 *buf, int buf_len, int timeout) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + u8 trans_mode; + + if (!buf) + buf_len = 0; + + rtsx_usb_init_cmd(ucr); + if (cmd != NULL) { + dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__ + , cmd->opcode); + if (cmd->opcode == MMC_SEND_TUNING_BLOCK) + trans_mode = SD_TM_AUTO_TUNING; + else + trans_mode = SD_TM_NORMAL_READ; + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD4, 0xFF, (u8)cmd->arg); + } else { + trans_mode = SD_TM_AUTO_READ_3; + } + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, + 0xFF, (u8)(byte_cnt >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, + SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | + SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); + if (trans_mode != SD_TM_AUTO_TUNING) + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, + 0xFF, trans_mode | SD_TRANSFER_START); + rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, + SD_TRANSFER_END, SD_TRANSFER_END); + + if (cmd != NULL) { + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); + } + + err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); + if (err) { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_send_cmd failed (err = %d)\n", err); + return err; + } + + err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); + if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { + sd_print_debug_regs(host); + + if (!err) { + dev_dbg(sdmmc_dev(host), + "Transfer failed (SD_TRANSFER = %02x)\n", + ucr->rsp_buf[0]); + err = -EIO; + } else { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_get_rsp failed (err = %d)\n", err); + } + + return err; + } + + if (cmd != NULL) { + cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); + dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", + cmd->resp[0]); + } + + if (buf && buf_len) { + /* 2-byte aligned part */ + err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2)); + if (err) { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_read_ppbuf failed (err = %d)\n", err); + return err; + } + + /* unaligned byte */ + if (byte_cnt % 2) + return rtsx_usb_read_register(ucr, + PPBUF_BASE2 + byte_cnt, + buf + byte_cnt - 1); + } + + return 0; +} + +static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd, + u16 byte_cnt, u8 *buf, int buf_len, int timeout) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + u8 trans_mode; + + if (!buf) + buf_len = 0; + + if (buf && buf_len) { + err = rtsx_usb_write_ppbuf(ucr, buf, buf_len); + if (err) { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_write_ppbuf failed (err = %d)\n", + err); + return err; + } + } + + trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3; + rtsx_usb_init_cmd(ucr); + + if (cmd != NULL) { + dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__, + cmd->opcode); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD1, 0xFF, (u8)(cmd->arg >> 24)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD2, 0xFF, (u8)(cmd->arg >> 16)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD3, 0xFF, (u8)(cmd->arg >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CMD4, 0xFF, (u8)cmd->arg); + } + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, + 0xFF, (u8)(byte_cnt >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, + SD_CALCULATE_CRC7 | SD_CHECK_CRC16 | + SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, + trans_mode | SD_TRANSFER_START); + rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, + SD_TRANSFER_END, SD_TRANSFER_END); + + if (cmd != NULL) { + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0); + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0); + } + + err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout); + if (err) { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_send_cmd failed (err = %d)\n", err); + return err; + } + + err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout); + if (err) { + sd_print_debug_regs(host); + dev_dbg(sdmmc_dev(host), + "rtsx_usb_get_rsp failed (err = %d)\n", err); + return err; + } + + if (cmd != NULL) { + cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1); + dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n", + cmd->resp[0]); + } + + return 0; +} + +static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host, + struct mmc_command *cmd) +{ + struct rtsx_ucr *ucr = host->ucr; + u8 cmd_idx = (u8)cmd->opcode; + u32 arg = cmd->arg; + int err = 0; + int timeout = 100; + int i; + u8 *ptr; + int stat_idx = 0; + int len = 2; + u8 rsp_type; + + dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n", + __func__, cmd_idx, arg); + + /* Response type: + * R0 + * R1, R5, R6, R7 + * R1b + * R2 + * R3, R4 + */ + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: + rsp_type = SD_RSP_TYPE_R0; + break; + case MMC_RSP_R1: + rsp_type = SD_RSP_TYPE_R1; + break; + case MMC_RSP_R1 & ~MMC_RSP_CRC: + rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7; + break; + case MMC_RSP_R1B: + rsp_type = SD_RSP_TYPE_R1b; + break; + case MMC_RSP_R2: + rsp_type = SD_RSP_TYPE_R2; + break; + case MMC_RSP_R3: + rsp_type = SD_RSP_TYPE_R3; + break; + default: + dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n"); + err = -EINVAL; + goto out; + } + + if (rsp_type == SD_RSP_TYPE_R1b) + timeout = 3000; + + if (cmd->opcode == SD_SWITCH_VOLTAGE) { + err = rtsx_usb_write_register(ucr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, + SD_CLK_TOGGLE_EN); + if (err) + goto out; + } + + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, + 0x01, PINGPONG_BUFFER); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, + 0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START); + rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, + SD_TRANSFER_END | SD_STAT_IDLE, + SD_TRANSFER_END | SD_STAT_IDLE); + + if (rsp_type == SD_RSP_TYPE_R2) { + /* Read data from ping-pong buffer */ + for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++) + rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); + stat_idx = 16; + } else if (rsp_type != SD_RSP_TYPE_R0) { + /* Read data from SD_CMDx registers */ + for (i = SD_CMD0; i <= SD_CMD4; i++) + rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0); + stat_idx = 5; + } + len += stat_idx; + + rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0); + + err = rtsx_usb_send_cmd(ucr, MODE_CR, 100); + if (err) { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_send_cmd error (err = %d)\n", err); + goto out; + } + + err = rtsx_usb_get_rsp(ucr, len, timeout); + if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) { + sd_print_debug_regs(host); + sd_clear_error(host); + + if (!err) { + dev_dbg(sdmmc_dev(host), + "Transfer failed (SD_TRANSFER = %02x)\n", + ucr->rsp_buf[0]); + err = -EIO; + } else { + dev_dbg(sdmmc_dev(host), + "rtsx_usb_get_rsp failed (err = %d)\n", err); + } + + goto out; + } + + if (rsp_type == SD_RSP_TYPE_R0) { + err = 0; + goto out; + } + + /* Skip result of CHECK_REG_CMD */ + ptr = ucr->rsp_buf + 1; + + /* Check (Start,Transmission) bit of Response */ + if ((ptr[0] & 0xC0) != 0) { + err = -EILSEQ; + dev_dbg(sdmmc_dev(host), "Invalid response bit\n"); + goto out; + } + + /* Check CRC7 */ + if (!(rsp_type & SD_NO_CHECK_CRC7)) { + if (ptr[stat_idx] & SD_CRC7_ERR) { + err = -EILSEQ; + dev_dbg(sdmmc_dev(host), "CRC7 error\n"); + goto out; + } + } + + 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]); + } + +out: + cmd->error = err; +} + +static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq) +{ + struct rtsx_ucr *ucr = host->ucr; + struct mmc_data *data = mrq->data; + int read = (data->flags & MMC_DATA_READ) ? 1 : 0; + u8 cfg2, trans_mode; + int err; + u8 flag; + size_t data_len = data->blksz * data->blocks; + unsigned int pipe; + + if (read) { + dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n", + __func__, data_len); + 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 { + dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n", + __func__, data_len); + 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; + } + + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, + 0xFF, (u8)data->blocks); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, + 0xFF, (u8)(data->blocks >> 8)); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE, + 0x01, RING_BUFFER); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3, + 0xFF, (u8)(data_len >> 24)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2, + 0xFF, (u8)(data_len >> 16)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1, + 0xFF, (u8)(data_len >> 8)); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, + 0xFF, (u8)data_len); + if (read) { + flag = MODE_CDIR; + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, + 0x03 | DMA_PACK_SIZE_MASK, + DMA_DIR_FROM_CARD | DMA_EN | DMA_512); + } else { + flag = MODE_CDOR; + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL, + 0x03 | DMA_PACK_SIZE_MASK, + DMA_DIR_TO_CARD | DMA_EN | DMA_512); + } + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, + trans_mode | SD_TRANSFER_START); + rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER, + SD_TRANSFER_END, SD_TRANSFER_END); + + err = rtsx_usb_send_cmd(ucr, flag, 100); + if (err) + return err; + + if (read) + pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN); + else + pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT); + + err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len, + data->sg_len, NULL, 10000); + if (err) { + dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n" + , err); + sd_clear_error(host); + return err; + } + + return rtsx_usb_get_rsp(ucr, 1, 2000); +} + +static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host) +{ + rtsx_usb_write_register(host->ucr, SD_CFG1, + SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128); +} + +static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host) +{ + rtsx_usb_write_register(host->ucr, SD_CFG1, + SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0); +} + +static void sd_normal_rw(struct rtsx_usb_sdmmc *host, + struct mmc_request *mrq) +{ + struct mmc_command *cmd = mrq->cmd; + struct mmc_data *data = mrq->data; + u8 *buf; + + 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 rtsx_usb_sdmmc *host, u8 sample_point, int tx) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + + dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n", + __func__, tx ? "TX" : "RX", sample_point); + + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE); + + if (tx) + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, + 0x0F, sample_point); + else + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL, + 0x0F, sample_point); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, + PHASE_NOT_RESET, PHASE_NOT_RESET); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0); + + err = rtsx_usb_send_cmd(ucr, MODE_C, 100); + if (err) + return err; + + return 0; +} + +static inline u32 get_phase_point(u32 phase_map, unsigned int idx) +{ + idx &= MAX_PHASE; + return phase_map & (1 << idx); +} + +static int get_phase_len(u32 phase_map, unsigned int idx) +{ + int i; + + for (i = 0; i < MAX_PHASE + 1; i++) { + if (get_phase_point(phase_map, idx + i) == 0) + return i; + } + return MAX_PHASE + 1; +} + +static u8 sd_search_final_phase(struct rtsx_usb_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_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map); + return final_phase; + } + + while (start < MAX_PHASE + 1) { + len = 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) & MAX_PHASE; + 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 rtsx_usb_sdmmc *host) +{ + int err, i; + u8 val = 0; + + for (i = 0; i < 100; i++) { + err = rtsx_usb_ep0_read_register(host->ucr, + SD_DATA_STATE, &val); + if (val & SD_DATA_IDLE) + return; + + usleep_range(100, 1000); + } +} + +static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host, + u8 opcode, u8 sample_point) +{ + int err; + struct mmc_command cmd = {0}; + + err = sd_change_phase(host, sample_point, 0); + if (err) + return err; + + cmd.opcode = MMC_SEND_TUNING_BLOCK; + err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100); + if (err) { + /* Wait till SD DATA IDLE */ + sd_wait_data_idle(host); + sd_clear_error(host); + return err; + } + + return 0; +} + +static void sd_tuning_phase(struct rtsx_usb_sdmmc *host, + u8 opcode, u16 *phase_map) +{ + int err, i; + u16 raw_phase_map = 0; + + for (i = MAX_PHASE; i >= 0; i--) { + err = sd_tuning_rx_cmd(host, opcode, (u8)i); + if (!err) + raw_phase_map |= 1 << i; + } + + if (phase_map) + *phase_map = raw_phase_map; +} + +static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode) +{ + int err, i; + u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map; + u8 final_phase; + + /* setting fixed default TX phase */ + err = sd_change_phase(host, 0x01, 1); + if (err) { + dev_dbg(sdmmc_dev(host), "TX phase setting failed\n"); + return err; + } + + /* tuning RX phase */ + for (i = 0; i < RX_TUNING_CNT; i++) { + sd_tuning_phase(host, opcode, &(raw_phase_map[i])); + + if (raw_phase_map[i] == 0) + break; + } + + phase_map = 0xFFFF; + for (i = 0; i < RX_TUNING_CNT; i++) { + dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n", + i, raw_phase_map[i]); + phase_map &= raw_phase_map[i]; + } + dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\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, 0); + if (err) + return err; + } else { + return -EINVAL; + } + + return 0; +} + +static int sdmmc_get_ro(struct mmc_host *mmc) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + int err; + u16 val; + + if (host->host_removal) + return -ENOMEDIUM; + + mutex_lock(&ucr->dev_mutex); + + /* Check SD card detect */ + err = rtsx_usb_get_card_status(ucr, &val); + + mutex_unlock(&ucr->dev_mutex); + + + /* Treat failed detection as non-ro */ + if (err) + return 0; + + if (val & SD_WP) + return 1; + + return 0; +} + +static int sdmmc_get_cd(struct mmc_host *mmc) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + int err; + u16 val; + + if (host->host_removal) + return -ENOMEDIUM; + + mutex_lock(&ucr->dev_mutex); + + /* Check SD card detect */ + err = rtsx_usb_get_card_status(ucr, &val); + + mutex_unlock(&ucr->dev_mutex); + + /* Treat failed detection as non-exist */ + if (err) + goto no_card; + + if (val & SD_CD) { + host->card_exist = true; + return 1; + } + +no_card: + host->card_exist = false; + return 0; +} + +static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + struct mmc_command *cmd = mrq->cmd; + struct mmc_data *data = mrq->data; + unsigned int data_size = 0; + + dev_dbg(sdmmc_dev(host), "%s\n", __func__); + + if (host->host_removal) { + cmd->error = -ENOMEDIUM; + goto finish; + } + + if ((!host->card_exist)) { + cmd->error = -ENOMEDIUM; + goto finish_detect_card; + } + + /* + * Reject SDIO CMDs to speed up card identification + * since unsupported + */ + if (cmd->opcode == SD_IO_SEND_OP_COND || + cmd->opcode == SD_IO_RW_DIRECT || + cmd->opcode == SD_IO_RW_EXTENDED) { + cmd->error = -EINVAL; + goto finish; + } + + mutex_lock(&ucr->dev_mutex); + + mutex_lock(&host->host_mutex); + host->mrq = mrq; + mutex_unlock(&host->host_mutex); + + if (mrq->data) + data_size = data->blocks * data->blksz; + + if (!data_size) { + sd_send_cmd_get_rsp(host, cmd); + } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) || + mmc_op_multi(cmd->opcode)) { + sd_send_cmd_get_rsp(host, cmd); + + if (!cmd->error) { + sd_rw_multi(host, mrq); + + if (mmc_op_multi(cmd->opcode) && mrq->stop) { + sd_send_cmd_get_rsp(host, mrq->stop); + rtsx_usb_write_register(ucr, MC_FIFO_CTL, + FIFO_FLUSH, FIFO_FLUSH); + } + } + } else { + sd_normal_rw(host, mrq); + } + + if (mrq->data) { + if (cmd->error || data->error) + data->bytes_xfered = 0; + else + data->bytes_xfered = data->blocks * data->blksz; + } + + mutex_unlock(&ucr->dev_mutex); + +finish_detect_card: + if (cmd->error) { + /* + * detect card when fail to update card existence state and + * speed up card removal when retry + */ + sdmmc_get_cd(mmc); + dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error); + } + +finish: + mutex_lock(&host->host_mutex); + host->mrq = NULL; + mutex_unlock(&host->host_mutex); + + mmc_request_done(mmc, mrq); +} + +static int sd_set_bus_width(struct rtsx_usb_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_usb_write_register(host->ucr, SD_CFG1, + 0x03, width[bus_width]); + + return err; +} + +static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr) +{ + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); + + return rtsx_usb_send_cmd(ucr, MODE_C, 100); +} + +static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr) +{ + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59); + + return rtsx_usb_send_cmd(ucr, MODE_C, 100); +} + +static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr) +{ + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5); + + return rtsx_usb_send_cmd(ucr, MODE_C, 100); +} + +static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr) +{ + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A); + + return rtsx_usb_send_cmd(ucr, MODE_C, 100); +} + +static int sd_power_on(struct rtsx_usb_sdmmc *host) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + + dev_dbg(sdmmc_dev(host), "%s\n", __func__); + rtsx_usb_init_cmd(ucr); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE, + CARD_SHARE_MASK, CARD_SHARE_SD); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, + SD_CLK_EN, SD_CLK_EN); + err = rtsx_usb_send_cmd(ucr, MODE_C, 100); + if (err) + return err; + + if (CHECK_PKG(ucr, LQFP48)) + err = sd_pull_ctl_enable_lqfp48(ucr); + else + err = sd_pull_ctl_enable_qfn24(ucr); + if (err) + return err; + + err = rtsx_usb_write_register(ucr, CARD_PWR_CTL, + POWER_MASK, PARTIAL_POWER_ON); + if (err) + return err; + + usleep_range(800, 1000); + + rtsx_usb_init_cmd(ucr); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, + POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, + SD_OUTPUT_EN, SD_OUTPUT_EN); + + return rtsx_usb_send_cmd(ucr, MODE_C, 100); +} + +static int sd_power_off(struct rtsx_usb_sdmmc *host) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + + dev_dbg(sdmmc_dev(host), "%s\n", __func__); + rtsx_usb_init_cmd(ucr); + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, + POWER_MASK, POWER_OFF); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL, + POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND); + + err = rtsx_usb_send_cmd(ucr, MODE_C, 100); + if (err) + return err; + + if (CHECK_PKG(ucr, LQFP48)) + return sd_pull_ctl_disable_lqfp48(ucr); + return sd_pull_ctl_disable_qfn24(ucr); +} + +static int sd_set_power_mode(struct rtsx_usb_sdmmc *host, + unsigned char power_mode) +{ + int err; + + if (power_mode != MMC_POWER_OFF) + power_mode = MMC_POWER_ON; + + if (power_mode == host->power_mode) + return 0; + + if (power_mode == MMC_POWER_OFF) { + err = sd_power_off(host); + pm_runtime_put(sdmmc_dev(host)); + } else { + pm_runtime_get_sync(sdmmc_dev(host)); + err = sd_power_on(host); + } + + if (!err) + host->power_mode = power_mode; + + return err; +} + +static int sd_set_timing(struct rtsx_usb_sdmmc *host, + unsigned char timing, bool *ddr_mode) +{ + struct rtsx_ucr *ucr = host->ucr; + int err; + + *ddr_mode = false; + + rtsx_usb_init_cmd(ucr); + + switch (timing) { + case MMC_TIMING_UHS_SDR104: + case MMC_TIMING_UHS_SDR50: + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, + 0x0C | SD_ASYNC_FIFO_RST, + SD_30_MODE | SD_ASYNC_FIFO_RST); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, + CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); + break; + + case MMC_TIMING_UHS_DDR50: + *ddr_mode = true; + + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, + 0x0C | SD_ASYNC_FIFO_RST, + SD_DDR_MODE | SD_ASYNC_FIFO_RST); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, + CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, + DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT); + rtsx_usb_add_cmd(ucr, 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_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, + 0x0C, SD_20_MODE); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, + CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL, + SD20_TX_SEL_MASK, SD20_TX_14_AHEAD); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, + SD20_RX_SEL_MASK, SD20_RX_14_DELAY); + break; + + default: + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_CFG1, 0x0C, SD_20_MODE); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF, + CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, + SD_PUSH_POINT_CTL, 0xFF, 0); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL, + SD20_RX_SEL_MASK, SD20_RX_POS_EDGE); + break; + } + + err = rtsx_usb_send_cmd(ucr, MODE_C, 100); + + return err; +} + +static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + + dev_dbg(sdmmc_dev(host), "%s\n", __func__); + mutex_lock(&ucr->dev_mutex); + + if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) { + mutex_unlock(&ucr->dev_mutex); + return; + } + + sd_set_power_mode(host, ios->power_mode); + sd_set_bus_width(host, ios->bus_width); + sd_set_timing(host, ios->timing, &host->ddr_mode); + + host->vpclk = false; + host->double_clk = true; + + switch (ios->timing) { + case MMC_TIMING_UHS_SDR104: + case MMC_TIMING_UHS_SDR50: + host->ssc_depth = SSC_DEPTH_2M; + host->vpclk = true; + host->double_clk = false; + break; + case MMC_TIMING_UHS_DDR50: + case MMC_TIMING_UHS_SDR25: + host->ssc_depth = SSC_DEPTH_1M; + break; + default: + host->ssc_depth = SSC_DEPTH_512K; + break; + } + + host->initial_mode = (ios->clock <= 1000000) ? true : false; + host->clock = ios->clock; + + rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth, + host->initial_mode, host->double_clk, host->vpclk); + + mutex_unlock(&ucr->dev_mutex); + dev_dbg(sdmmc_dev(host), "%s end\n", __func__); +} + +static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + int err = 0; + + dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n", + __func__, ios->signal_voltage); + + if (host->host_removal) + return -ENOMEDIUM; + + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120) + return -EPERM; + + mutex_lock(&ucr->dev_mutex); + + err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD); + if (err) { + mutex_unlock(&ucr->dev_mutex); + return err; + } + + /* Let mmc core do the busy checking, simply stop the forced-toggle + * clock(while issuing CMD11) and switch voltage. + */ + rtsx_usb_init_cmd(ucr); + + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, + SD_IO_USING_1V8, SD_IO_USING_3V3); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, + TUNE_SD18_MASK, TUNE_SD18_3V3); + } else { + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, + SD_CLK_FORCE_STOP); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL, + SD_IO_USING_1V8, SD_IO_USING_1V8); + rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, + TUNE_SD18_MASK, TUNE_SD18_1V8); + } + + err = rtsx_usb_send_cmd(ucr, MODE_C, 100); + mutex_unlock(&ucr->dev_mutex); + + return err; +} + +static int sdmmc_card_busy(struct mmc_host *mmc) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + int err; + u8 stat; + u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS + | SD_DAT0_STATUS; + + dev_dbg(sdmmc_dev(host), "%s\n", __func__); + + mutex_lock(&ucr->dev_mutex); + + err = rtsx_usb_write_register(ucr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, + SD_CLK_TOGGLE_EN); + if (err) + goto out; + + mdelay(1); + + err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat); + if (err) + goto out; + + err = rtsx_usb_write_register(ucr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); +out: + mutex_unlock(&ucr->dev_mutex); + + if (err) + return err; + + /* check if any pin between dat[0:3] is low */ + if ((stat & mask) != mask) + return 1; + else + return 0; +} + +static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) +{ + struct rtsx_usb_sdmmc *host = mmc_priv(mmc); + struct rtsx_ucr *ucr = host->ucr; + int err = 0; + + if (host->host_removal) + return -ENOMEDIUM; + + mutex_lock(&ucr->dev_mutex); + + if (!host->ddr_mode) + err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK); + + mutex_unlock(&ucr->dev_mutex); + + return err; +} + +static const struct mmc_host_ops rtsx_usb_sdmmc_ops = { + .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, + .card_busy = sdmmc_card_busy, + .execute_tuning = sdmmc_execute_tuning, +}; + +#ifdef RTSX_USB_USE_LEDS_CLASS +static void rtsx_usb_led_control(struct led_classdev *led, + enum led_brightness brightness) +{ + struct rtsx_usb_sdmmc *host = container_of(led, + struct rtsx_usb_sdmmc, led); + + if (host->host_removal) + return; + + host->led.brightness = brightness; + schedule_work(&host->led_work); +} + +static void rtsx_usb_update_led(struct work_struct *work) +{ + struct rtsx_usb_sdmmc *host = + container_of(work, struct rtsx_usb_sdmmc, led_work); + struct rtsx_ucr *ucr = host->ucr; + + mutex_lock(&ucr->dev_mutex); + + if (host->led.brightness == LED_OFF) + rtsx_usb_turn_off_led(ucr); + else + rtsx_usb_turn_on_led(ucr); + + mutex_unlock(&ucr->dev_mutex); +} +#endif + +static void rtsx_usb_init_host(struct rtsx_usb_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_CAP_UHS_SDR50 | + MMC_CAP_NEEDS_POLL; + + mmc->max_current_330 = 400; + mmc->max_current_180 = 800; + mmc->ops = &rtsx_usb_sdmmc_ops; + mmc->max_segs = 256; + mmc->max_seg_size = 65536; + mmc->max_blk_size = 512; + mmc->max_blk_count = 65535; + mmc->max_req_size = 524288; + + host->power_mode = MMC_POWER_OFF; +} + +static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev) +{ + struct mmc_host *mmc; + struct rtsx_usb_sdmmc *host; + struct rtsx_ucr *ucr; +#ifdef RTSX_USB_USE_LEDS_CLASS + int err; +#endif + + ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent)); + if (!ucr) + return -ENXIO; + + dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n"); + + mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); + if (!mmc) + return -ENOMEM; + + host = mmc_priv(mmc); + host->ucr = ucr; + host->mmc = mmc; + host->pdev = pdev; + platform_set_drvdata(pdev, host); + + mutex_init(&host->host_mutex); + rtsx_usb_init_host(host); + pm_runtime_enable(&pdev->dev); + +#ifdef RTSX_USB_USE_LEDS_CLASS + snprintf(host->led_name, sizeof(host->led_name), + "%s::", mmc_hostname(mmc)); + host->led.name = host->led_name; + host->led.brightness = LED_OFF; + host->led.default_trigger = mmc_hostname(mmc); + host->led.brightness_set = rtsx_usb_led_control; + + err = led_classdev_register(mmc_dev(mmc), &host->led); + if (err) + dev_err(&(pdev->dev), + "Failed to register LED device: %d\n", err); + INIT_WORK(&host->led_work, rtsx_usb_update_led); + +#endif + mmc_add_host(mmc); + + return 0; +} + +static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev) +{ + struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev); + struct mmc_host *mmc; + + if (!host) + return 0; + + mmc = host->mmc; + host->host_removal = true; + + mutex_lock(&host->host_mutex); + if (host->mrq) { + dev_dbg(&(pdev->dev), + "%s: Controller removed during transfer\n", + mmc_hostname(mmc)); + host->mrq->cmd->error = -ENOMEDIUM; + if (host->mrq->stop) + host->mrq->stop->error = -ENOMEDIUM; + mmc_request_done(mmc, host->mrq); + } + mutex_unlock(&host->host_mutex); + + mmc_remove_host(mmc); + +#ifdef RTSX_USB_USE_LEDS_CLASS + cancel_work_sync(&host->led_work); + led_classdev_unregister(&host->led); +#endif + + mmc_free_host(mmc); + pm_runtime_disable(&pdev->dev); + platform_set_drvdata(pdev, NULL); + + dev_dbg(&(pdev->dev), + ": Realtek USB SD/MMC module has been removed\n"); + + return 0; +} + +static struct platform_device_id rtsx_usb_sdmmc_ids[] = { + { + .name = "rtsx_usb_sdmmc", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids); + +static struct platform_driver rtsx_usb_sdmmc_driver = { + .probe = rtsx_usb_sdmmc_drv_probe, + .remove = rtsx_usb_sdmmc_drv_remove, + .id_table = rtsx_usb_sdmmc_ids, + .driver = { + .owner = THIS_MODULE, + .name = "rtsx_usb_sdmmc", + }, +}; +module_platform_driver(rtsx_usb_sdmmc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>"); +MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver"); |