On 12 February 2014 11:00, <rogerable@xxxxxxxxxxx> wrote: > From: Roger Tseng <rogerable@xxxxxxxxxxx> > > Realtek USB SD/MMC host driver provides mmc host support based on the Realtek > USB card reader MFD driver. > > Signed-off-by: Roger Tseng <rogerable@xxxxxxxxxxx> Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > --- > drivers/mmc/host/Kconfig | 7 + > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/rtsx_usb_sdmmc.c | 1462 +++++++++++++++++++++++++++++++++++++ > 3 files changed, 1470 insertions(+) > create mode 100644 drivers/mmc/host/rtsx_usb_sdmmc.c > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 7fc5099..16f9a23 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -665,3 +665,10 @@ config MMC_REALTEK_PCI > help > Say Y here to include driver code to support SD/MMC card interface > of Realtek PCI-E card reader > + > +config MMC_REALTEK_USB > + tristate "Realtek USB SD/MMC Card Interface Driver" > + depends on MFD_RTSX_USB > + help > + Say Y here to include driver code to support SD/MMC card interface > + of Realtek RTS5129/39 series card reader > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile > index c41d0c3..9d8d765 100644 > --- a/drivers/mmc/host/Makefile > +++ b/drivers/mmc/host/Makefile > @@ -51,6 +51,7 @@ obj-$(CONFIG_MMC_USHC) += ushc.o > obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o > > obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o > +obj-$(CONFIG_MMC_REALTEK_USB) += rtsx_usb_sdmmc.o > > obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o > obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o > diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c > new file mode 100644 > index 0000000..37f58b5 > --- /dev/null > +++ b/drivers/mmc/host/rtsx_usb_sdmmc.c > @@ -0,0 +1,1462 @@ > +/* 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@xxxxxxxxxxx> > + */ > + > +#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) > +#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; > + > +#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE) > + 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); > + > + /* Balance possible unbalanced usage count > + * e.g. unconditional module removal > + */ > + if (pm_runtime_active(&pdev->dev)) > + pm_runtime_put(&pdev->dev); > + > + 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@xxxxxxxxxxx>"); > +MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver"); > -- > 1.8.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
