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Subject[PATCH v5 2/3] mmc: Add realtek USB sdmmc host driver
Date
From: Roger Tseng <rogerable@realtek.com>

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@realtek.com>
---
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@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)
+#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@realtek.com>");
+MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
--
1.8.2


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