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linux/drivers/mmc/host/rtsx_usb_sdmmc.c

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/* Realtek USB SD/MMC Card Interface driver
*
* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Author:
* Roger Tseng <rogerable@realtek.com>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/card.h>
#include <linux/scatterlist.h>
#include <linux/pm_runtime.h>
#include <linux/mfd/rtsx_usb.h>
#include <asm/unaligned.h>
#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
defined(CONFIG_MMC_REALTEK_USB_MODULE))
#include <linux/leds.h>
#include <linux/workqueue.h>
#define RTSX_USB_USE_LEDS_CLASS
#endif
struct rtsx_usb_sdmmc {
struct platform_device *pdev;
struct rtsx_ucr *ucr;
struct mmc_host *mmc;
struct mmc_request *mrq;
struct mutex host_mutex;
u8 ssc_depth;
unsigned int clock;
bool vpclk;
bool double_clk;
bool host_removal;
bool card_exist;
bool initial_mode;
bool ddr_mode;
unsigned char power_mode;
#ifdef RTSX_USB_USE_LEDS_CLASS
struct led_classdev led;
char led_name[32];
struct work_struct led_work;
#endif
};
static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
{
return &(host->pdev->dev);
}
static inline void sd_clear_error(struct rtsx_usb_sdmmc *host)
{
struct rtsx_ucr *ucr = host->ucr;
rtsx_usb_ep0_write_register(ucr, CARD_STOP,
SD_STOP | SD_CLR_ERR,
SD_STOP | SD_CLR_ERR);
rtsx_usb_clear_dma_err(ucr);
rtsx_usb_clear_fsm_err(ucr);
}
#ifdef DEBUG
static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host)
{
struct rtsx_ucr *ucr = host->ucr;
u8 val = 0;
rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val);
dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val);
rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val);
dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val);
rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val);
dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val);
}
#else
#define sd_print_debug_regs(host)
#endif /* DEBUG */
static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
u16 byte_cnt, u8 *buf, int buf_len, int timeout)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
u8 trans_mode;
if (!buf)
buf_len = 0;
rtsx_usb_init_cmd(ucr);
if (cmd != NULL) {
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__
, cmd->opcode);
if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
trans_mode = SD_TM_AUTO_TUNING;
else
trans_mode = SD_TM_NORMAL_READ;
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD4, 0xFF, (u8)cmd->arg);
} else {
trans_mode = SD_TM_AUTO_READ_3;
}
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
0xFF, (u8)(byte_cnt >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
if (trans_mode != SD_TM_AUTO_TUNING)
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
0xFF, trans_mode | SD_TRANSFER_START);
rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
if (cmd != NULL) {
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
}
err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
if (err) {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_send_cmd failed (err = %d)\n", err);
return err;
}
err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
sd_print_debug_regs(host);
if (!err) {
dev_dbg(sdmmc_dev(host),
"Transfer failed (SD_TRANSFER = %02x)\n",
ucr->rsp_buf[0]);
err = -EIO;
} else {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_get_rsp failed (err = %d)\n", err);
}
return err;
}
if (cmd != NULL) {
cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
cmd->resp[0]);
}
if (buf && buf_len) {
/* 2-byte aligned part */
err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2));
if (err) {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_read_ppbuf failed (err = %d)\n", err);
return err;
}
/* unaligned byte */
if (byte_cnt % 2)
return rtsx_usb_read_register(ucr,
PPBUF_BASE2 + byte_cnt,
buf + byte_cnt - 1);
}
return 0;
}
static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
u16 byte_cnt, u8 *buf, int buf_len, int timeout)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
u8 trans_mode;
if (!buf)
buf_len = 0;
if (buf && buf_len) {
err = rtsx_usb_write_ppbuf(ucr, buf, buf_len);
if (err) {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_write_ppbuf failed (err = %d)\n",
err);
return err;
}
}
trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
rtsx_usb_init_cmd(ucr);
if (cmd != NULL) {
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__,
cmd->opcode);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CMD4, 0xFF, (u8)cmd->arg);
}
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
0xFF, (u8)(byte_cnt >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
trans_mode | SD_TRANSFER_START);
rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
if (cmd != NULL) {
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
}
err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
if (err) {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_send_cmd failed (err = %d)\n", err);
return err;
}
err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
if (err) {
sd_print_debug_regs(host);
dev_dbg(sdmmc_dev(host),
"rtsx_usb_get_rsp failed (err = %d)\n", err);
return err;
}
if (cmd != NULL) {
cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
cmd->resp[0]);
}
return 0;
}
static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host,
struct mmc_command *cmd)
{
struct rtsx_ucr *ucr = host->ucr;
u8 cmd_idx = (u8)cmd->opcode;
u32 arg = cmd->arg;
int err = 0;
int timeout = 100;
int i;
u8 *ptr;
int stat_idx = 0;
int len = 2;
u8 rsp_type;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd_idx, arg);
/* Response type:
* R0
* R1, R5, R6, R7
* R1b
* R2
* R3, R4
*/
switch (mmc_resp_type(cmd)) {
case MMC_RSP_NONE:
rsp_type = SD_RSP_TYPE_R0;
break;
case MMC_RSP_R1:
rsp_type = SD_RSP_TYPE_R1;
break;
case MMC_RSP_R1 & ~MMC_RSP_CRC:
rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
break;
case MMC_RSP_R1B:
rsp_type = SD_RSP_TYPE_R1b;
break;
case MMC_RSP_R2:
rsp_type = SD_RSP_TYPE_R2;
break;
case MMC_RSP_R3:
rsp_type = SD_RSP_TYPE_R3;
break;
default:
dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
err = -EINVAL;
goto out;
}
if (rsp_type == SD_RSP_TYPE_R1b)
timeout = 3000;
if (cmd->opcode == SD_SWITCH_VOLTAGE) {
err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
SD_CLK_TOGGLE_EN);
if (err)
goto out;
}
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
0x01, PINGPONG_BUFFER);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END | SD_STAT_IDLE,
SD_TRANSFER_END | SD_STAT_IDLE);
if (rsp_type == SD_RSP_TYPE_R2) {
/* Read data from ping-pong buffer */
for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
stat_idx = 16;
} else if (rsp_type != SD_RSP_TYPE_R0) {
/* Read data from SD_CMDx registers */
for (i = SD_CMD0; i <= SD_CMD4; i++)
rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
stat_idx = 5;
}
len += stat_idx;
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
if (err) {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_send_cmd error (err = %d)\n", err);
goto out;
}
err = rtsx_usb_get_rsp(ucr, len, timeout);
if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
sd_print_debug_regs(host);
sd_clear_error(host);
if (!err) {
dev_dbg(sdmmc_dev(host),
"Transfer failed (SD_TRANSFER = %02x)\n",
ucr->rsp_buf[0]);
err = -EIO;
} else {
dev_dbg(sdmmc_dev(host),
"rtsx_usb_get_rsp failed (err = %d)\n", err);
}
goto out;
}
if (rsp_type == SD_RSP_TYPE_R0) {
err = 0;
goto out;
}
/* Skip result of CHECK_REG_CMD */
ptr = ucr->rsp_buf + 1;
/* Check (Start,Transmission) bit of Response */
if ((ptr[0] & 0xC0) != 0) {
err = -EILSEQ;
dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
goto out;
}
/* Check CRC7 */
if (!(rsp_type & SD_NO_CHECK_CRC7)) {
if (ptr[stat_idx] & SD_CRC7_ERR) {
err = -EILSEQ;
dev_dbg(sdmmc_dev(host), "CRC7 error\n");
goto out;
}
}
if (rsp_type == SD_RSP_TYPE_R2) {
/*
* The controller offloads the last byte {CRC-7, end bit 1'b1}
* of response type R2. Assign dummy CRC, 0, and end bit to the
* byte(ptr[16], goes into the LSB of resp[3] later).
*/
ptr[16] = 1;
for (i = 0; i < 4; i++) {
cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
i, cmd->resp[i]);
}
} else {
cmd->resp[0] = get_unaligned_be32(ptr + 1);
dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
cmd->resp[0]);
}
out:
cmd->error = err;
}
static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
{
struct rtsx_ucr *ucr = host->ucr;
struct mmc_data *data = mrq->data;
int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
u8 cfg2, trans_mode;
int err;
u8 flag;
size_t data_len = data->blksz * data->blocks;
unsigned int pipe;
if (read) {
dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
__func__, data_len);
cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
trans_mode = SD_TM_AUTO_READ_3;
} else {
dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
__func__, data_len);
cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
trans_mode = SD_TM_AUTO_WRITE_3;
}
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
0xFF, (u8)data->blocks);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
0xFF, (u8)(data->blocks >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
0x01, RING_BUFFER);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
0xFF, (u8)(data_len >> 24));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
0xFF, (u8)(data_len >> 16));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
0xFF, (u8)(data_len >> 8));
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
0xFF, (u8)data_len);
if (read) {
flag = MODE_CDIR;
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
0x03 | DMA_PACK_SIZE_MASK,
DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
} else {
flag = MODE_CDOR;
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
0x03 | DMA_PACK_SIZE_MASK,
DMA_DIR_TO_CARD | DMA_EN | DMA_512);
}
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
trans_mode | SD_TRANSFER_START);
rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
err = rtsx_usb_send_cmd(ucr, flag, 100);
if (err)
return err;
if (read)
pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
else
pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
data->sg_len, NULL, 10000);
if (err) {
dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
, err);
sd_clear_error(host);
return err;
}
return rtsx_usb_get_rsp(ucr, 1, 2000);
}
static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
{
rtsx_usb_write_register(host->ucr, SD_CFG1,
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
}
static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
{
rtsx_usb_write_register(host->ucr, SD_CFG1,
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
}
static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
struct mmc_request *mrq)
{
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
u8 *buf;
buf = kzalloc(data->blksz, GFP_NOIO);
if (!buf) {
cmd->error = -ENOMEM;
return;
}
if (data->flags & MMC_DATA_READ) {
if (host->initial_mode)
sd_disable_initial_mode(host);
cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
data->blksz, 200);
if (host->initial_mode)
sd_enable_initial_mode(host);
sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
} else {
sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
data->blksz, 200);
}
kfree(buf);
}
static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
__func__, tx ? "TX" : "RX", sample_point);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
if (tx)
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
0x0F, sample_point);
else
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
0x0F, sample_point);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
PHASE_NOT_RESET, PHASE_NOT_RESET);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
if (err)
return err;
return 0;
}
static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
{
idx &= MAX_PHASE;
return phase_map & (1 << idx);
}
static int get_phase_len(u32 phase_map, unsigned int idx)
{
int i;
for (i = 0; i < MAX_PHASE + 1; i++) {
if (get_phase_point(phase_map, idx + i) == 0)
return i;
}
return MAX_PHASE + 1;
}
static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
{
int start = 0, len = 0;
int start_final = 0, len_final = 0;
u8 final_phase = 0xFF;
if (phase_map == 0) {
dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
return final_phase;
}
while (start < MAX_PHASE + 1) {
len = get_phase_len(phase_map, start);
if (len_final < len) {
start_final = start;
len_final = len;
}
start += len ? len : 1;
}
final_phase = (start_final + len_final / 2) & MAX_PHASE;
dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
phase_map, len_final, final_phase);
return final_phase;
}
static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
{
int err, i;
u8 val = 0;
for (i = 0; i < 100; i++) {
err = rtsx_usb_ep0_read_register(host->ucr,
SD_DATA_STATE, &val);
if (val & SD_DATA_IDLE)
return;
usleep_range(100, 1000);
}
}
static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
u8 opcode, u8 sample_point)
{
int err;
struct mmc_command cmd = {0};
err = sd_change_phase(host, sample_point, 0);
if (err)
return err;
cmd.opcode = MMC_SEND_TUNING_BLOCK;
err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
if (err) {
/* Wait till SD DATA IDLE */
sd_wait_data_idle(host);
sd_clear_error(host);
return err;
}
return 0;
}
static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
u8 opcode, u16 *phase_map)
{
int err, i;
u16 raw_phase_map = 0;
for (i = MAX_PHASE; i >= 0; i--) {
err = sd_tuning_rx_cmd(host, opcode, (u8)i);
if (!err)
raw_phase_map |= 1 << i;
}
if (phase_map)
*phase_map = raw_phase_map;
}
static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
{
int err, i;
u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
u8 final_phase;
/* setting fixed default TX phase */
err = sd_change_phase(host, 0x01, 1);
if (err) {
dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
return err;
}
/* tuning RX phase */
for (i = 0; i < RX_TUNING_CNT; i++) {
sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
if (raw_phase_map[i] == 0)
break;
}
phase_map = 0xFFFF;
for (i = 0; i < RX_TUNING_CNT; i++) {
dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
i, raw_phase_map[i]);
phase_map &= raw_phase_map[i];
}
dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
if (phase_map) {
final_phase = sd_search_final_phase(host, phase_map);
if (final_phase == 0xFF)
return -EINVAL;
err = sd_change_phase(host, final_phase, 0);
if (err)
return err;
} else {
return -EINVAL;
}
return 0;
}
static int sdmmc_get_ro(struct mmc_host *mmc)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
int err;
u16 val;
if (host->host_removal)
return -ENOMEDIUM;
mutex_lock(&ucr->dev_mutex);
/* Check SD card detect */
err = rtsx_usb_get_card_status(ucr, &val);
mutex_unlock(&ucr->dev_mutex);
/* Treat failed detection as non-ro */
if (err)
return 0;
if (val & SD_WP)
return 1;
return 0;
}
static int sdmmc_get_cd(struct mmc_host *mmc)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
int err;
u16 val;
if (host->host_removal)
return -ENOMEDIUM;
mutex_lock(&ucr->dev_mutex);
/* Check SD card detect */
err = rtsx_usb_get_card_status(ucr, &val);
mutex_unlock(&ucr->dev_mutex);
/* Treat failed detection as non-exist */
if (err)
goto no_card;
if (val & SD_CD) {
host->card_exist = true;
return 1;
}
no_card:
host->card_exist = false;
return 0;
}
static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
unsigned int data_size = 0;
dev_dbg(sdmmc_dev(host), "%s\n", __func__);
if (host->host_removal) {
cmd->error = -ENOMEDIUM;
goto finish;
}
if ((!host->card_exist)) {
cmd->error = -ENOMEDIUM;
goto finish_detect_card;
}
/*
* Reject SDIO CMDs to speed up card identification
* since unsupported
*/
if (cmd->opcode == SD_IO_SEND_OP_COND ||
cmd->opcode == SD_IO_RW_DIRECT ||
cmd->opcode == SD_IO_RW_EXTENDED) {
cmd->error = -EINVAL;
goto finish;
}
mutex_lock(&ucr->dev_mutex);
mutex_lock(&host->host_mutex);
host->mrq = mrq;
mutex_unlock(&host->host_mutex);
if (mrq->data)
data_size = data->blocks * data->blksz;
if (!data_size) {
sd_send_cmd_get_rsp(host, cmd);
} else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
mmc_op_multi(cmd->opcode)) {
sd_send_cmd_get_rsp(host, cmd);
if (!cmd->error) {
sd_rw_multi(host, mrq);
if (mmc_op_multi(cmd->opcode) && mrq->stop) {
sd_send_cmd_get_rsp(host, mrq->stop);
rtsx_usb_write_register(ucr, MC_FIFO_CTL,
FIFO_FLUSH, FIFO_FLUSH);
}
}
} else {
sd_normal_rw(host, mrq);
}
if (mrq->data) {
if (cmd->error || data->error)
data->bytes_xfered = 0;
else
data->bytes_xfered = data->blocks * data->blksz;
}
mutex_unlock(&ucr->dev_mutex);
finish_detect_card:
if (cmd->error) {
/*
* detect card when fail to update card existence state and
* speed up card removal when retry
*/
sdmmc_get_cd(mmc);
dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
}
finish:
mutex_lock(&host->host_mutex);
host->mrq = NULL;
mutex_unlock(&host->host_mutex);
mmc_request_done(mmc, mrq);
}
static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
unsigned char bus_width)
{
int err = 0;
u8 width[] = {
[MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
[MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
[MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
};
if (bus_width <= MMC_BUS_WIDTH_8)
err = rtsx_usb_write_register(host->ucr, SD_CFG1,
0x03, width[bus_width]);
return err;
}
static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
{
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
{
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
{
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
{
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
static int sd_power_on(struct rtsx_usb_sdmmc *host)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
dev_dbg(sdmmc_dev(host), "%s\n", __func__);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
CARD_SHARE_MASK, CARD_SHARE_SD);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
SD_CLK_EN, SD_CLK_EN);
err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
if (err)
return err;
if (CHECK_PKG(ucr, LQFP48))
err = sd_pull_ctl_enable_lqfp48(ucr);
else
err = sd_pull_ctl_enable_qfn24(ucr);
if (err)
return err;
err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
POWER_MASK, PARTIAL_POWER_ON);
if (err)
return err;
usleep_range(800, 1000);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
SD_OUTPUT_EN, SD_OUTPUT_EN);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
static int sd_power_off(struct rtsx_usb_sdmmc *host)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
dev_dbg(sdmmc_dev(host), "%s\n", __func__);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
POWER_MASK, POWER_OFF);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
if (err)
return err;
if (CHECK_PKG(ucr, LQFP48))
return sd_pull_ctl_disable_lqfp48(ucr);
return sd_pull_ctl_disable_qfn24(ucr);
}
static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
unsigned char power_mode)
{
int err;
if (power_mode != MMC_POWER_OFF)
power_mode = MMC_POWER_ON;
if (power_mode == host->power_mode)
return 0;
if (power_mode == MMC_POWER_OFF) {
err = sd_power_off(host);
pm_runtime_put(sdmmc_dev(host));
} else {
pm_runtime_get_sync(sdmmc_dev(host));
err = sd_power_on(host);
}
if (!err)
host->power_mode = power_mode;
return err;
}
static int sd_set_timing(struct rtsx_usb_sdmmc *host,
unsigned char timing, bool *ddr_mode)
{
struct rtsx_ucr *ucr = host->ucr;
int err;
*ddr_mode = false;
rtsx_usb_init_cmd(ucr);
switch (timing) {
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_UHS_SDR50:
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
0x0C | SD_ASYNC_FIFO_RST,
SD_30_MODE | SD_ASYNC_FIFO_RST);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
break;
case MMC_TIMING_UHS_DDR50:
*ddr_mode = true;
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
0x0C | SD_ASYNC_FIFO_RST,
SD_DDR_MODE | SD_ASYNC_FIFO_RST);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
break;
case MMC_TIMING_MMC_HS:
case MMC_TIMING_SD_HS:
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
0x0C, SD_20_MODE);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
break;
default:
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_CFG1, 0x0C, SD_20_MODE);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
SD_PUSH_POINT_CTL, 0xFF, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
break;
}
err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
return err;
}
static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
dev_dbg(sdmmc_dev(host), "%s\n", __func__);
mutex_lock(&ucr->dev_mutex);
if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) {
mutex_unlock(&ucr->dev_mutex);
return;
}
sd_set_power_mode(host, ios->power_mode);
sd_set_bus_width(host, ios->bus_width);
sd_set_timing(host, ios->timing, &host->ddr_mode);
host->vpclk = false;
host->double_clk = true;
switch (ios->timing) {
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_UHS_SDR50:
host->ssc_depth = SSC_DEPTH_2M;
host->vpclk = true;
host->double_clk = false;
break;
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_UHS_SDR25:
host->ssc_depth = SSC_DEPTH_1M;
break;
default:
host->ssc_depth = SSC_DEPTH_512K;
break;
}
host->initial_mode = (ios->clock <= 1000000) ? true : false;
host->clock = ios->clock;
rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
host->initial_mode, host->double_clk, host->vpclk);
mutex_unlock(&ucr->dev_mutex);
dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
}
static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
int err = 0;
dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
__func__, ios->signal_voltage);
if (host->host_removal)
return -ENOMEDIUM;
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
return -EPERM;
mutex_lock(&ucr->dev_mutex);
err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
if (err) {
mutex_unlock(&ucr->dev_mutex);
return err;
}
/* Let mmc core do the busy checking, simply stop the forced-toggle
* clock(while issuing CMD11) and switch voltage.
*/
rtsx_usb_init_cmd(ucr);
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
SD_IO_USING_1V8, SD_IO_USING_3V3);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
TUNE_SD18_MASK, TUNE_SD18_3V3);
} else {
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
SD_CLK_FORCE_STOP);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
SD_IO_USING_1V8, SD_IO_USING_1V8);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
TUNE_SD18_MASK, TUNE_SD18_1V8);
}
err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
mutex_unlock(&ucr->dev_mutex);
return err;
}
static int sdmmc_card_busy(struct mmc_host *mmc)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
int err;
u8 stat;
u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
| SD_DAT0_STATUS;
dev_dbg(sdmmc_dev(host), "%s\n", __func__);
mutex_lock(&ucr->dev_mutex);
err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
SD_CLK_TOGGLE_EN);
if (err)
goto out;
mdelay(1);
err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
if (err)
goto out;
err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
out:
mutex_unlock(&ucr->dev_mutex);
if (err)
return err;
/* check if any pin between dat[0:3] is low */
if ((stat & mask) != mask)
return 1;
else
return 0;
}
static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
struct rtsx_ucr *ucr = host->ucr;
int err = 0;
if (host->host_removal)
return -ENOMEDIUM;
mutex_lock(&ucr->dev_mutex);
if (!host->ddr_mode)
err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
mutex_unlock(&ucr->dev_mutex);
return err;
}
static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
.request = sdmmc_request,
.set_ios = sdmmc_set_ios,
.get_ro = sdmmc_get_ro,
.get_cd = sdmmc_get_cd,
.start_signal_voltage_switch = sdmmc_switch_voltage,
.card_busy = sdmmc_card_busy,
.execute_tuning = sdmmc_execute_tuning,
};
#ifdef RTSX_USB_USE_LEDS_CLASS
static void rtsx_usb_led_control(struct led_classdev *led,
enum led_brightness brightness)
{
struct rtsx_usb_sdmmc *host = container_of(led,
struct rtsx_usb_sdmmc, led);
if (host->host_removal)
return;
host->led.brightness = brightness;
schedule_work(&host->led_work);
}
static void rtsx_usb_update_led(struct work_struct *work)
{
struct rtsx_usb_sdmmc *host =
container_of(work, struct rtsx_usb_sdmmc, led_work);
struct rtsx_ucr *ucr = host->ucr;
mutex_lock(&ucr->dev_mutex);
if (host->led.brightness == LED_OFF)
rtsx_usb_turn_off_led(ucr);
else
rtsx_usb_turn_on_led(ucr);
mutex_unlock(&ucr->dev_mutex);
}
#endif
static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
{
struct mmc_host *mmc = host->mmc;
mmc->f_min = 250000;
mmc->f_max = 208000000;
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
MMC_CAP_NEEDS_POLL;
mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
mmc->max_current_330 = 400;
mmc->max_current_180 = 800;
mmc->ops = &rtsx_usb_sdmmc_ops;
mmc->max_segs = 256;
mmc->max_seg_size = 65536;
mmc->max_blk_size = 512;
mmc->max_blk_count = 65535;
mmc->max_req_size = 524288;
host->power_mode = MMC_POWER_OFF;
}
static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
{
struct mmc_host *mmc;
struct rtsx_usb_sdmmc *host;
struct rtsx_ucr *ucr;
#ifdef RTSX_USB_USE_LEDS_CLASS
int err;
#endif
ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
if (!ucr)
return -ENXIO;
dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
if (!mmc)
return -ENOMEM;
host = mmc_priv(mmc);
host->ucr = ucr;
host->mmc = mmc;
host->pdev = pdev;
platform_set_drvdata(pdev, host);
mutex_init(&host->host_mutex);
rtsx_usb_init_host(host);
pm_runtime_enable(&pdev->dev);
#ifdef RTSX_USB_USE_LEDS_CLASS
snprintf(host->led_name, sizeof(host->led_name),
"%s::", mmc_hostname(mmc));
host->led.name = host->led_name;
host->led.brightness = LED_OFF;
host->led.default_trigger = mmc_hostname(mmc);
host->led.brightness_set = rtsx_usb_led_control;
err = led_classdev_register(mmc_dev(mmc), &host->led);
if (err)
dev_err(&(pdev->dev),
"Failed to register LED device: %d\n", err);
INIT_WORK(&host->led_work, rtsx_usb_update_led);
#endif
mmc_add_host(mmc);
return 0;
}
static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
{
struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
struct mmc_host *mmc;
if (!host)
return 0;
mmc = host->mmc;
host->host_removal = true;
mutex_lock(&host->host_mutex);
if (host->mrq) {
dev_dbg(&(pdev->dev),
"%s: Controller removed during transfer\n",
mmc_hostname(mmc));
host->mrq->cmd->error = -ENOMEDIUM;
if (host->mrq->stop)
host->mrq->stop->error = -ENOMEDIUM;
mmc_request_done(mmc, host->mrq);
}
mutex_unlock(&host->host_mutex);
mmc_remove_host(mmc);
#ifdef RTSX_USB_USE_LEDS_CLASS
cancel_work_sync(&host->led_work);
led_classdev_unregister(&host->led);
#endif
mmc_free_host(mmc);
pm_runtime_disable(&pdev->dev);
platform_set_drvdata(pdev, NULL);
dev_dbg(&(pdev->dev),
": Realtek USB SD/MMC module has been removed\n");
return 0;
}
static const struct platform_device_id rtsx_usb_sdmmc_ids[] = {
{
.name = "rtsx_usb_sdmmc",
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
static struct platform_driver rtsx_usb_sdmmc_driver = {
.probe = rtsx_usb_sdmmc_drv_probe,
.remove = rtsx_usb_sdmmc_drv_remove,
.id_table = rtsx_usb_sdmmc_ids,
.driver = {
.name = "rtsx_usb_sdmmc",
},
};
module_platform_driver(rtsx_usb_sdmmc_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
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