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linux_dsm_epyc7002/drivers/mmc/host/rtsx_pci_sdmmc.c
Thomas Gleixner aaf4989bd4 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 17 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 or at your option any
  later version 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 13 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154042.236620792@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 11:28:46 +02:00

1476 lines
36 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/* Realtek PCI-Express SD/MMC Card Interface driver
*
* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
*
* Author:
* Wei WANG <wei_wang@realsil.com.cn>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/workqueue.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/rtsx_pci.h>
#include <asm/unaligned.h>
struct realtek_pci_sdmmc {
struct platform_device *pdev;
struct rtsx_pcr *pcr;
struct mmc_host *mmc;
struct mmc_request *mrq;
#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
struct work_struct work;
struct mutex host_mutex;
u8 ssc_depth;
unsigned int clock;
bool vpclk;
bool double_clk;
bool eject;
bool initial_mode;
int power_state;
#define SDMMC_POWER_ON 1
#define SDMMC_POWER_OFF 0
int sg_count;
s32 cookie;
int cookie_sg_count;
bool using_cookie;
};
static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
{
return &(host->pdev->dev);
}
static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
{
rtsx_pci_write_register(host->pcr, CARD_STOP,
SD_STOP | SD_CLR_ERR, SD_STOP | SD_CLR_ERR);
}
#ifdef DEBUG
static void dump_reg_range(struct realtek_pci_sdmmc *host, u16 start, u16 end)
{
u16 len = end - start + 1;
int i;
u8 data[8];
for (i = 0; i < len; i += 8) {
int j;
int n = min(8, len - i);
memset(&data, 0, sizeof(data));
for (j = 0; j < n; j++)
rtsx_pci_read_register(host->pcr, start + i + j,
data + j);
dev_dbg(sdmmc_dev(host), "0x%04X(%d): %8ph\n",
start + i, n, data);
}
}
static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
{
dump_reg_range(host, 0xFDA0, 0xFDB3);
dump_reg_range(host, 0xFD52, 0xFD69);
}
#else
#define sd_print_debug_regs(host)
#endif /* DEBUG */
static inline int sd_get_cd_int(struct realtek_pci_sdmmc *host)
{
return rtsx_pci_readl(host->pcr, RTSX_BIPR) & SD_EXIST;
}
static void sd_cmd_set_sd_cmd(struct rtsx_pcr *pcr, struct mmc_command *cmd)
{
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF,
SD_CMD_START | cmd->opcode);
rtsx_pci_write_be32(pcr, SD_CMD1, cmd->arg);
}
static void sd_cmd_set_data_len(struct rtsx_pcr *pcr, u16 blocks, u16 blksz)
{
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, blocks);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, blocks >> 8);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, blksz);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, blksz >> 8);
}
static int sd_response_type(struct mmc_command *cmd)
{
switch (mmc_resp_type(cmd)) {
case MMC_RSP_NONE:
return SD_RSP_TYPE_R0;
case MMC_RSP_R1:
return SD_RSP_TYPE_R1;
case MMC_RSP_R1_NO_CRC:
return SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
case MMC_RSP_R1B:
return SD_RSP_TYPE_R1b;
case MMC_RSP_R2:
return SD_RSP_TYPE_R2;
case MMC_RSP_R3:
return SD_RSP_TYPE_R3;
default:
return -EINVAL;
}
}
static int sd_status_index(int resp_type)
{
if (resp_type == SD_RSP_TYPE_R0)
return 0;
else if (resp_type == SD_RSP_TYPE_R2)
return 16;
return 5;
}
/*
* sd_pre_dma_transfer - do dma_map_sg() or using cookie
*
* @pre: if called in pre_req()
* return:
* 0 - do dma_map_sg()
* 1 - using cookie
*/
static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
struct mmc_data *data, bool pre)
{
struct rtsx_pcr *pcr = host->pcr;
int read = data->flags & MMC_DATA_READ;
int count = 0;
int using_cookie = 0;
if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
dev_err(sdmmc_dev(host),
"error: data->host_cookie = %d, host->cookie = %d\n",
data->host_cookie, host->cookie);
data->host_cookie = 0;
}
if (pre || data->host_cookie != host->cookie) {
count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
} else {
count = host->cookie_sg_count;
using_cookie = 1;
}
if (pre) {
host->cookie_sg_count = count;
if (++host->cookie < 0)
host->cookie = 1;
data->host_cookie = host->cookie;
} else {
host->sg_count = count;
}
return using_cookie;
}
static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct mmc_data *data = mrq->data;
if (data->host_cookie) {
dev_err(sdmmc_dev(host),
"error: reset data->host_cookie = %d\n",
data->host_cookie);
data->host_cookie = 0;
}
sd_pre_dma_transfer(host, data, true);
dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
}
static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
int err)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
struct mmc_data *data = mrq->data;
int read = data->flags & MMC_DATA_READ;
rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
data->host_cookie = 0;
}
static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
struct mmc_command *cmd)
{
struct rtsx_pcr *pcr = host->pcr;
u8 cmd_idx = (u8)cmd->opcode;
u32 arg = cmd->arg;
int err = 0;
int timeout = 100;
int i;
u8 *ptr;
int rsp_type;
int stat_idx;
bool clock_toggled = false;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd_idx, arg);
rsp_type = sd_response_type(cmd);
if (rsp_type < 0)
goto out;
stat_idx = sd_status_index(rsp_type);
if (rsp_type == SD_RSP_TYPE_R1b)
timeout = cmd->busy_timeout ? cmd->busy_timeout : 3000;
if (cmd->opcode == SD_SWITCH_VOLTAGE) {
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
0xFF, SD_CLK_TOGGLE_EN);
if (err < 0)
goto out;
clock_toggled = true;
}
rtsx_pci_init_cmd(pcr);
sd_cmd_set_sd_cmd(pcr, cmd);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
0x01, PINGPONG_BUFFER);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
rtsx_pci_add_cmd(pcr, 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_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
} else if (rsp_type != SD_RSP_TYPE_R0) {
/* Read data from SD_CMDx registers */
for (i = SD_CMD0; i <= SD_CMD4; i++)
rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
}
rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
err = rtsx_pci_send_cmd(pcr, timeout);
if (err < 0) {
sd_print_debug_regs(host);
sd_clear_error(host);
dev_dbg(sdmmc_dev(host),
"rtsx_pci_send_cmd error (err = %d)\n", err);
goto out;
}
if (rsp_type == SD_RSP_TYPE_R0) {
err = 0;
goto out;
}
/* Eliminate returned value of CHECK_REG_CMD */
ptr = rtsx_pci_get_cmd_data(pcr) + 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;
if (err && clock_toggled)
rtsx_pci_write_register(pcr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
}
static int sd_read_data(struct realtek_pci_sdmmc *host, struct mmc_command *cmd,
u16 byte_cnt, u8 *buf, int buf_len, int timeout)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
u8 trans_mode;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd->opcode, cmd->arg);
if (!buf)
buf_len = 0;
if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
trans_mode = SD_TM_AUTO_TUNING;
else
trans_mode = SD_TM_NORMAL_READ;
rtsx_pci_init_cmd(pcr);
sd_cmd_set_sd_cmd(pcr, cmd);
sd_cmd_set_data_len(pcr, 1, byte_cnt);
rtsx_pci_add_cmd(pcr, 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_pci_add_cmd(pcr, WRITE_REG_CMD,
CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER,
0xFF, trans_mode | SD_TRANSFER_START);
rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
err = rtsx_pci_send_cmd(pcr, timeout);
if (err < 0) {
sd_print_debug_regs(host);
dev_dbg(sdmmc_dev(host),
"rtsx_pci_send_cmd fail (err = %d)\n", err);
return err;
}
if (buf && buf_len) {
err = rtsx_pci_read_ppbuf(pcr, buf, buf_len);
if (err < 0) {
dev_dbg(sdmmc_dev(host),
"rtsx_pci_read_ppbuf fail (err = %d)\n", err);
return err;
}
}
return 0;
}
static int sd_write_data(struct realtek_pci_sdmmc *host,
struct mmc_command *cmd, u16 byte_cnt, u8 *buf, int buf_len,
int timeout)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd->opcode, cmd->arg);
if (!buf)
buf_len = 0;
sd_send_cmd_get_rsp(host, cmd);
if (cmd->error)
return cmd->error;
if (buf && buf_len) {
err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
if (err < 0) {
dev_dbg(sdmmc_dev(host),
"rtsx_pci_write_ppbuf fail (err = %d)\n", err);
return err;
}
}
rtsx_pci_init_cmd(pcr);
sd_cmd_set_data_len(pcr, 1, byte_cnt);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF,
SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
err = rtsx_pci_send_cmd(pcr, timeout);
if (err < 0) {
sd_print_debug_regs(host);
dev_dbg(sdmmc_dev(host),
"rtsx_pci_send_cmd fail (err = %d)\n", err);
return err;
}
return 0;
}
static int sd_read_long_data(struct realtek_pci_sdmmc *host,
struct mmc_request *mrq)
{
struct rtsx_pcr *pcr = host->pcr;
struct mmc_host *mmc = host->mmc;
struct mmc_card *card = mmc->card;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
int uhs = mmc_card_uhs(card);
u8 cfg2 = 0;
int err;
int resp_type;
size_t data_len = data->blksz * data->blocks;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd->opcode, cmd->arg);
resp_type = sd_response_type(cmd);
if (resp_type < 0)
return resp_type;
if (!uhs)
cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
rtsx_pci_init_cmd(pcr);
sd_cmd_set_sd_cmd(pcr, cmd);
sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
DMA_DONE_INT, DMA_DONE_INT);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
0xFF, (u8)(data_len >> 24));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
0xFF, (u8)(data_len >> 16));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
0xFF, (u8)(data_len >> 8));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
0x03 | DMA_PACK_SIZE_MASK,
DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
0x01, RING_BUFFER);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2 | resp_type);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
SD_TRANSFER_START | SD_TM_AUTO_READ_2);
rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
rtsx_pci_send_cmd_no_wait(pcr);
err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 1, 10000);
if (err < 0) {
sd_print_debug_regs(host);
sd_clear_error(host);
return err;
}
return 0;
}
static int sd_write_long_data(struct realtek_pci_sdmmc *host,
struct mmc_request *mrq)
{
struct rtsx_pcr *pcr = host->pcr;
struct mmc_host *mmc = host->mmc;
struct mmc_card *card = mmc->card;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
int uhs = mmc_card_uhs(card);
u8 cfg2;
int err;
size_t data_len = data->blksz * data->blocks;
sd_send_cmd_get_rsp(host, cmd);
if (cmd->error)
return cmd->error;
dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
__func__, cmd->opcode, cmd->arg);
cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
if (!uhs)
cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
rtsx_pci_init_cmd(pcr);
sd_cmd_set_data_len(pcr, data->blocks, data->blksz);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
DMA_DONE_INT, DMA_DONE_INT);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC3,
0xFF, (u8)(data_len >> 24));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2,
0xFF, (u8)(data_len >> 16));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1,
0xFF, (u8)(data_len >> 8));
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)data_len);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
0x03 | DMA_PACK_SIZE_MASK,
DMA_DIR_TO_CARD | DMA_EN | DMA_512);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
0x01, RING_BUFFER);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
SD_TRANSFER_START | SD_TM_AUTO_WRITE_3);
rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
SD_TRANSFER_END, SD_TRANSFER_END);
rtsx_pci_send_cmd_no_wait(pcr);
err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, 0, 10000);
if (err < 0) {
sd_clear_error(host);
return err;
}
return 0;
}
static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
{
struct mmc_data *data = mrq->data;
if (host->sg_count < 0) {
data->error = host->sg_count;
dev_dbg(sdmmc_dev(host), "%s: sg_count = %d is invalid\n",
__func__, host->sg_count);
return data->error;
}
if (data->flags & MMC_DATA_READ)
return sd_read_long_data(host, mrq);
return sd_write_long_data(host, mrq);
}
static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
{
rtsx_pci_write_register(host->pcr, SD_CFG1,
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
}
static inline void sd_disable_initial_mode(struct realtek_pci_sdmmc *host)
{
rtsx_pci_write_register(host->pcr, SD_CFG1,
SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
}
static void sd_normal_rw(struct realtek_pci_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 realtek_pci_sdmmc *host,
u8 sample_point, bool rx)
{
struct rtsx_pcr *pcr = host->pcr;
dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
__func__, rx ? "RX" : "TX", sample_point);
rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
if (rx)
rtsx_pci_write_register(pcr, SD_VPRX_CTL,
PHASE_SELECT_MASK, sample_point);
else
rtsx_pci_write_register(pcr, SD_VPTX_CTL,
PHASE_SELECT_MASK, sample_point);
rtsx_pci_write_register(pcr, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
rtsx_pci_write_register(pcr, SD_VPCLK0_CTL, PHASE_NOT_RESET,
PHASE_NOT_RESET);
rtsx_pci_write_register(pcr, CLK_CTL, CHANGE_CLK, 0);
rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
return 0;
}
static inline u32 test_phase_bit(u32 phase_map, unsigned int bit)
{
bit %= RTSX_PHASE_MAX;
return phase_map & (1 << bit);
}
static int sd_get_phase_len(u32 phase_map, unsigned int start_bit)
{
int i;
for (i = 0; i < RTSX_PHASE_MAX; i++) {
if (test_phase_bit(phase_map, start_bit + i) == 0)
return i;
}
return RTSX_PHASE_MAX;
}
static u8 sd_search_final_phase(struct realtek_pci_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_err(sdmmc_dev(host), "phase error: [map:%x]\n", phase_map);
return final_phase;
}
while (start < RTSX_PHASE_MAX) {
len = sd_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) % RTSX_PHASE_MAX;
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 realtek_pci_sdmmc *host)
{
int err, i;
u8 val = 0;
for (i = 0; i < 100; i++) {
err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
if (val & SD_DATA_IDLE)
return;
udelay(100);
}
}
static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
u8 opcode, u8 sample_point)
{
int err;
struct mmc_command cmd = {};
struct rtsx_pcr *pcr = host->pcr;
sd_change_phase(host, sample_point, true);
rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN,
SD_RSP_80CLK_TIMEOUT_EN);
cmd.opcode = opcode;
err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
if (err < 0) {
/* Wait till SD DATA IDLE */
sd_wait_data_idle(host);
sd_clear_error(host);
rtsx_pci_write_register(pcr, SD_CFG3,
SD_RSP_80CLK_TIMEOUT_EN, 0);
return err;
}
rtsx_pci_write_register(pcr, SD_CFG3, SD_RSP_80CLK_TIMEOUT_EN, 0);
return 0;
}
static int sd_tuning_phase(struct realtek_pci_sdmmc *host,
u8 opcode, u32 *phase_map)
{
int err, i;
u32 raw_phase_map = 0;
for (i = 0; i < RTSX_PHASE_MAX; i++) {
err = sd_tuning_rx_cmd(host, opcode, (u8)i);
if (err == 0)
raw_phase_map |= 1 << i;
}
if (phase_map)
*phase_map = raw_phase_map;
return 0;
}
static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
{
int err, i;
u32 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
u8 final_phase;
for (i = 0; i < RX_TUNING_CNT; i++) {
err = sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
if (err < 0)
return err;
if (raw_phase_map[i] == 0)
break;
}
phase_map = 0xFFFFFFFF;
for (i = 0; i < RX_TUNING_CNT; i++) {
dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%08x\n",
i, raw_phase_map[i]);
phase_map &= raw_phase_map[i];
}
dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%08x\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, true);
if (err < 0)
return err;
} else {
return -EINVAL;
}
return 0;
}
static inline int sdio_extblock_cmd(struct mmc_command *cmd,
struct mmc_data *data)
{
return (cmd->opcode == SD_IO_RW_EXTENDED) && (data->blksz == 512);
}
static inline int sd_rw_cmd(struct mmc_command *cmd)
{
return mmc_op_multi(cmd->opcode) ||
(cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
(cmd->opcode == MMC_WRITE_BLOCK);
}
static void sd_request(struct work_struct *work)
{
struct realtek_pci_sdmmc *host = container_of(work,
struct realtek_pci_sdmmc, work);
struct rtsx_pcr *pcr = host->pcr;
struct mmc_host *mmc = host->mmc;
struct mmc_request *mrq = host->mrq;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
unsigned int data_size = 0;
int err;
if (host->eject || !sd_get_cd_int(host)) {
cmd->error = -ENOMEDIUM;
goto finish;
}
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
if (err) {
cmd->error = err;
goto finish;
}
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
host->initial_mode, host->double_clk, host->vpclk);
rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, SD_MOD_SEL);
rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
CARD_SHARE_MASK, CARD_SHARE_48_SD);
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 (sd_rw_cmd(cmd) || sdio_extblock_cmd(cmd, data)) {
cmd->error = sd_rw_multi(host, mrq);
if (!host->using_cookie)
sdmmc_post_req(host->mmc, host->mrq, 0);
if (mmc_op_multi(cmd->opcode) && mrq->stop)
sd_send_cmd_get_rsp(host, mrq->stop);
} 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(&pcr->pcr_mutex);
finish:
if (cmd->error) {
dev_dbg(sdmmc_dev(host), "CMD %d 0x%08x error(%d)\n",
cmd->opcode, cmd->arg, cmd->error);
}
mutex_lock(&host->host_mutex);
host->mrq = NULL;
mutex_unlock(&host->host_mutex);
mmc_request_done(mmc, mrq);
}
static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct mmc_data *data = mrq->data;
mutex_lock(&host->host_mutex);
host->mrq = mrq;
mutex_unlock(&host->host_mutex);
if (sd_rw_cmd(mrq->cmd) || sdio_extblock_cmd(mrq->cmd, data))
host->using_cookie = sd_pre_dma_transfer(host, data, false);
schedule_work(&host->work);
}
static int sd_set_bus_width(struct realtek_pci_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_pci_write_register(host->pcr, SD_CFG1,
0x03, width[bus_width]);
return err;
}
static int sd_power_on(struct realtek_pci_sdmmc *host)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
if (host->power_state == SDMMC_POWER_ON)
return 0;
rtsx_pci_init_cmd(pcr);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
CARD_SHARE_MASK, CARD_SHARE_48_SD);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
SD_CLK_EN, SD_CLK_EN);
err = rtsx_pci_send_cmd(pcr, 100);
if (err < 0)
return err;
err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_SD_CARD);
if (err < 0)
return err;
err = rtsx_pci_card_power_on(pcr, RTSX_SD_CARD);
if (err < 0)
return err;
err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
if (err < 0)
return err;
host->power_state = SDMMC_POWER_ON;
return 0;
}
static int sd_power_off(struct realtek_pci_sdmmc *host)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
host->power_state = SDMMC_POWER_OFF;
rtsx_pci_init_cmd(pcr);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
err = rtsx_pci_send_cmd(pcr, 100);
if (err < 0)
return err;
err = rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
if (err < 0)
return err;
return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_SD_CARD);
}
static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
unsigned char power_mode)
{
int err;
if (power_mode == MMC_POWER_OFF)
err = sd_power_off(host);
else
err = sd_power_on(host);
return err;
}
static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
{
struct rtsx_pcr *pcr = host->pcr;
int err = 0;
rtsx_pci_init_cmd(pcr);
switch (timing) {
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_UHS_SDR50:
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
0x0C | SD_ASYNC_FIFO_NOT_RST,
SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
CLK_LOW_FREQ, CLK_LOW_FREQ);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
break;
case MMC_TIMING_MMC_DDR52:
case MMC_TIMING_UHS_DDR50:
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
0x0C | SD_ASYNC_FIFO_NOT_RST,
SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
CLK_LOW_FREQ, CLK_LOW_FREQ);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
rtsx_pci_add_cmd(pcr, 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_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
0x0C, SD_20_MODE);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
CLK_LOW_FREQ, CLK_LOW_FREQ);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
break;
default:
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
SD_CFG1, 0x0C, SD_20_MODE);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
CLK_LOW_FREQ, CLK_LOW_FREQ);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CLK_LOW_FREQ, 0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
SD_PUSH_POINT_CTL, 0xFF, 0);
rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
break;
}
err = rtsx_pci_send_cmd(pcr, 100);
return err;
}
static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
if (host->eject)
return;
if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD))
return;
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
sd_set_bus_width(host, ios->bus_width);
sd_set_power_mode(host, ios->power_mode);
sd_set_timing(host, ios->timing);
host->vpclk = false;
host->double_clk = true;
switch (ios->timing) {
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_UHS_SDR50:
host->ssc_depth = RTSX_SSC_DEPTH_2M;
host->vpclk = true;
host->double_clk = false;
break;
case MMC_TIMING_MMC_DDR52:
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_UHS_SDR25:
host->ssc_depth = RTSX_SSC_DEPTH_1M;
break;
default:
host->ssc_depth = RTSX_SSC_DEPTH_500K;
break;
}
host->initial_mode = (ios->clock <= 1000000) ? true : false;
host->clock = ios->clock;
rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
host->initial_mode, host->double_clk, host->vpclk);
mutex_unlock(&pcr->pcr_mutex);
}
static int sdmmc_get_ro(struct mmc_host *mmc)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
int ro = 0;
u32 val;
if (host->eject)
return -ENOMEDIUM;
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
/* Check SD mechanical write-protect switch */
val = rtsx_pci_readl(pcr, RTSX_BIPR);
dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
if (val & SD_WRITE_PROTECT)
ro = 1;
mutex_unlock(&pcr->pcr_mutex);
return ro;
}
static int sdmmc_get_cd(struct mmc_host *mmc)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
int cd = 0;
u32 val;
if (host->eject)
return cd;
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
/* Check SD card detect */
val = rtsx_pci_card_exist(pcr);
dev_dbg(sdmmc_dev(host), "%s: RTSX_BIPR = 0x%08x\n", __func__, val);
if (val & SD_EXIST)
cd = 1;
mutex_unlock(&pcr->pcr_mutex);
return cd;
}
static int sd_wait_voltage_stable_1(struct realtek_pci_sdmmc *host)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
u8 stat;
/* Reference to Signal Voltage Switch Sequence in SD spec.
* Wait for a period of time so that the card can drive SD_CMD and
* SD_DAT[3:0] to low after sending back CMD11 response.
*/
mdelay(1);
/* SD_CMD, SD_DAT[3:0] should be driven to low by card;
* If either one of SD_CMD,SD_DAT[3:0] is not low,
* abort the voltage switch sequence;
*/
err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
if (err < 0)
return err;
if (stat & (SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
SD_DAT1_STATUS | SD_DAT0_STATUS))
return -EINVAL;
/* Stop toggle SD clock */
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
0xFF, SD_CLK_FORCE_STOP);
if (err < 0)
return err;
return 0;
}
static int sd_wait_voltage_stable_2(struct realtek_pci_sdmmc *host)
{
struct rtsx_pcr *pcr = host->pcr;
int err;
u8 stat, mask, val;
/* Wait 1.8V output of voltage regulator in card stable */
msleep(50);
/* Toggle SD clock again */
err = rtsx_pci_write_register(pcr, SD_BUS_STAT, 0xFF, SD_CLK_TOGGLE_EN);
if (err < 0)
return err;
/* Wait for a period of time so that the card can drive
* SD_DAT[3:0] to high at 1.8V
*/
msleep(20);
/* SD_CMD, SD_DAT[3:0] should be pulled high by host */
err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat);
if (err < 0)
return err;
mask = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
SD_DAT1_STATUS | SD_DAT0_STATUS;
val = SD_CMD_STATUS | SD_DAT3_STATUS | SD_DAT2_STATUS |
SD_DAT1_STATUS | SD_DAT0_STATUS;
if ((stat & mask) != val) {
dev_dbg(sdmmc_dev(host),
"%s: SD_BUS_STAT = 0x%x\n", __func__, stat);
rtsx_pci_write_register(pcr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
rtsx_pci_write_register(pcr, CARD_CLK_EN, 0xFF, 0);
return -EINVAL;
}
return 0;
}
static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
int err = 0;
u8 voltage;
dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
__func__, ios->signal_voltage);
if (host->eject)
return -ENOMEDIUM;
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
if (err)
return err;
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
voltage = OUTPUT_3V3;
else
voltage = OUTPUT_1V8;
if (voltage == OUTPUT_1V8) {
err = sd_wait_voltage_stable_1(host);
if (err < 0)
goto out;
}
err = rtsx_pci_switch_output_voltage(pcr, voltage);
if (err < 0)
goto out;
if (voltage == OUTPUT_1V8) {
err = sd_wait_voltage_stable_2(host);
if (err < 0)
goto out;
}
out:
/* Stop toggle SD clock in idle */
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
mutex_unlock(&pcr->pcr_mutex);
return err;
}
static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
int err = 0;
if (host->eject)
return -ENOMEDIUM;
err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD);
if (err)
return err;
mutex_lock(&pcr->pcr_mutex);
rtsx_pci_start_run(pcr);
/* Set initial TX phase */
switch (mmc->ios.timing) {
case MMC_TIMING_UHS_SDR104:
err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
break;
case MMC_TIMING_UHS_SDR50:
err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
break;
case MMC_TIMING_UHS_DDR50:
err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
break;
default:
err = 0;
}
if (err)
goto out;
/* Tuning RX phase */
if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
(mmc->ios.timing == MMC_TIMING_UHS_SDR50))
err = sd_tuning_rx(host, opcode);
else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
out:
mutex_unlock(&pcr->pcr_mutex);
return err;
}
static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
.pre_req = sdmmc_pre_req,
.post_req = sdmmc_post_req,
.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,
.execute_tuning = sdmmc_execute_tuning,
};
static void init_extra_caps(struct realtek_pci_sdmmc *host)
{
struct mmc_host *mmc = host->mmc;
struct rtsx_pcr *pcr = host->pcr;
dev_dbg(sdmmc_dev(host), "pcr->extra_caps = 0x%x\n", pcr->extra_caps);
if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50)
mmc->caps |= MMC_CAP_UHS_SDR50;
if (pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
mmc->caps |= MMC_CAP_UHS_SDR104;
if (pcr->extra_caps & EXTRA_CAPS_SD_DDR50)
mmc->caps |= MMC_CAP_UHS_DDR50;
if (pcr->extra_caps & EXTRA_CAPS_MMC_HSDDR)
mmc->caps |= MMC_CAP_1_8V_DDR;
if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
mmc->caps |= MMC_CAP_8_BIT_DATA;
}
static void realtek_init_host(struct realtek_pci_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_ERASE;
mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
mmc->max_current_330 = 400;
mmc->max_current_180 = 800;
mmc->ops = &realtek_pci_sdmmc_ops;
init_extra_caps(host);
mmc->max_segs = 256;
mmc->max_seg_size = 65536;
mmc->max_blk_size = 512;
mmc->max_blk_count = 65535;
mmc->max_req_size = 524288;
}
static void rtsx_pci_sdmmc_card_event(struct platform_device *pdev)
{
struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
host->cookie = -1;
mmc_detect_change(host->mmc, 0);
}
static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
{
struct mmc_host *mmc;
struct realtek_pci_sdmmc *host;
struct rtsx_pcr *pcr;
struct pcr_handle *handle = pdev->dev.platform_data;
if (!handle)
return -ENXIO;
pcr = handle->pcr;
if (!pcr)
return -ENXIO;
dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
if (!mmc)
return -ENOMEM;
host = mmc_priv(mmc);
host->pcr = pcr;
host->mmc = mmc;
host->pdev = pdev;
host->cookie = -1;
host->power_state = SDMMC_POWER_OFF;
INIT_WORK(&host->work, sd_request);
platform_set_drvdata(pdev, host);
pcr->slots[RTSX_SD_CARD].p_dev = pdev;
pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
mutex_init(&host->host_mutex);
realtek_init_host(host);
mmc_add_host(mmc);
return 0;
}
static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
{
struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
struct rtsx_pcr *pcr;
struct mmc_host *mmc;
if (!host)
return 0;
pcr = host->pcr;
pcr->slots[RTSX_SD_CARD].p_dev = NULL;
pcr->slots[RTSX_SD_CARD].card_event = NULL;
mmc = host->mmc;
cancel_work_sync(&host->work);
mutex_lock(&host->host_mutex);
if (host->mrq) {
dev_dbg(&(pdev->dev),
"%s: Controller removed during transfer\n",
mmc_hostname(mmc));
rtsx_pci_complete_unfinished_transfer(pcr);
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);
host->eject = true;
flush_work(&host->work);
mmc_free_host(mmc);
dev_dbg(&(pdev->dev),
": Realtek PCI-E SDMMC controller has been removed\n");
return 0;
}
static const struct platform_device_id rtsx_pci_sdmmc_ids[] = {
{
.name = DRV_NAME_RTSX_PCI_SDMMC,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(platform, rtsx_pci_sdmmc_ids);
static struct platform_driver rtsx_pci_sdmmc_driver = {
.probe = rtsx_pci_sdmmc_drv_probe,
.remove = rtsx_pci_sdmmc_drv_remove,
.id_table = rtsx_pci_sdmmc_ids,
.driver = {
.name = DRV_NAME_RTSX_PCI_SDMMC,
},
};
module_platform_driver(rtsx_pci_sdmmc_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");
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