/* 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) { /* * The controller offloads the last byte {CRC-7, end bit 1'b1} * of response type R2. Assign dummy CRC, 0, and end bit to the * byte(ptr[16], goes into the LSB of resp[3] later). */ ptr[16] = 1; 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->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE; 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 const 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 = { .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");