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Date: Wed, 12 Feb 2014 11:24:51 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Roger <rogerable@...ltek.com>
Cc: Samuel Ortiz <sameo@...ux.intel.com>,
Lee Jones <lee.jones@...aro.org>, Chris Ball <cjb@...top.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Maxim Levitsky <maximlevitsky@...il.com>,
Alex Dubov <oakad@...oo.com>,
Dan Carpenter <dan.carpenter@...cle.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linux-mmc <linux-mmc@...r.kernel.org>,
driverdev-devel@...uxdriverproject.org,
Wei WANG <wei_wang@...lsil.com.cn>, micky_ching@...lsil.com.cn
Subject: Re: [PATCH v4 2/3] mmc: Add realtek USB sdmmc host driver
On 12 February 2014 11:00, <rogerable@...ltek.com> wrote:
> From: Roger Tseng <rogerable@...ltek.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@...ltek.com>
Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
> 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@...ltek.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@...ltek.com>");
> +MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
> --
> 1.8.2
>
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