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Message-ID: <69f885af4d2925aaac4e4d430e3d4603f44ce7b4.1344939464.git.wei_wang@realsil.com.cn>
Date: Tue, 14 Aug 2012 18:40:51 +0800
From: <wei_wang@...lsil.com.cn>
To: <gregkh@...uxfoundation.org>, <devel@...uxdriverproject.org>,
<linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
<cjb@...top.org>, <arnd@...db.de>, <sameo@...ux.intel.com>
CC: <bp@...en8.de>, Wei WANG <wei_wang@...lsil.com.cn>
Subject: [PATCH v2 2/2] drivers/mmc: Add realtek pcie sdmmc host driver
From: Wei WANG <wei_wang@...lsil.com.cn>
Realtek PCI-E SD/MMC card host driver is used to access SD/MMC card,
with the help of Realtek PCI-E card reader MFD driver.
Signed-off-by: Wei WANG <wei_wang@...lsil.com.cn>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
drivers/mmc/host/Kconfig | 7 +
drivers/mmc/host/Makefile | 2 +
drivers/mmc/host/rtsx_pci_sdmmc.c | 1348 +++++++++++++++++++++++++++++++++++++
3 files changed, 1357 insertions(+)
create mode 100644 drivers/mmc/host/rtsx_pci_sdmmc.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index aa131b3..d6f0c01 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -612,3 +612,10 @@ config MMC_USHC
Note: These controllers only support SDIO cards and do not
support MMC or SD memory cards.
+
+config MMC_REALTEK_PCI
+ tristate "Realtek PCI-E SD/MMC Card Interface Driver"
+ depends on MFD_RTSX_PCI
+ help
+ Say Y here to include driver code to support SD/MMC card interface
+ of Realtek PCI-E driver-based card reader
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 8922b06..4679ba3 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -45,6 +45,8 @@ obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
obj-$(CONFIG_MMC_USHC) += ushc.o
+obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o
+
obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o
obj-$(CONFIG_MMC_SDHCI_ESDHC_IMX) += sdhci-esdhc-imx.o
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
new file mode 100644
index 0000000..a71abbf
--- /dev/null
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -0,0 +1,1348 @@
+/* Realtek PCI-Express SD/MMC Card Interface driver
+ *
+ * Copyright(c) 2009 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 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/>.
+ *
+ * Author:
+ * Wei WANG <wei_wang@...lsil.com.cn>
+ * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+#include <linux/mmc/card.h>
+#include <linux/mfd/rtsx_pci.h>
+#include <asm/unaligned.h>
+
+#define MAX_RW_REG_CNT 1024
+
+#define RTSX_MAX_BLOCK_COUNT 65536
+#define RTSX_MAX_BLOCK_LENGTH 2048
+
+/* SD Tuning Data Structure
+ * Record continuous timing phase path
+ */
+struct timing_phase_path {
+ int start;
+ int end;
+ int mid;
+ int len;
+};
+
+struct realtek_pci_sdmmc {
+ struct platform_device *pdev;
+ struct rtsx_pcr *pcr;
+ struct mmc_host *mmc;
+ struct mmc_request *mrq;
+
+ struct mutex host_mutex;
+
+ bool eject;
+ bool initial_mode;
+ bool ddr_mode;
+};
+
+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 CONFIG_MMC_DEBUG
+
+static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ u16 i;
+ u8 *ptr;
+
+ /* Print SD host internal registers */
+ rtsx_pci_init_cmd(pcr);
+ for (i = 0xFDA0; i <= 0xFDAE; i++)
+ rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
+ for (i = 0xFD52; i <= 0xFD69; i++)
+ rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
+ rtsx_pci_send_cmd(pcr, 100);
+
+ ptr = rtsx_pci_get_cmd_data(pcr);
+ for (i = 0xFDA0; i <= 0xFDAE; i++)
+ dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+ for (i = 0xFD52; i <= 0xFD69; i++)
+ dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+}
+
+#else
+
+#define sd_print_debug_regs(host)
+
+#endif
+
+static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
+ u8 *buf, int buf_len, int timeout)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err, i;
+ u8 trans_mode;
+
+ dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d\n",
+ __func__, cmd[0] - 0x40);
+
+ if (!buf)
+ buf_len = 0;
+
+ if ((cmd[0] & 0x3F) == MMC_SEND_TUNING_BLOCK)
+ trans_mode = SD_TM_AUTO_TUNING;
+ else
+ trans_mode = SD_TM_NORMAL_READ;
+
+ rtsx_pci_init_cmd(pcr);
+
+ for (i = 0; i < 5; i++)
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+ SD_CMD0 + i, 0xFF, cmd[i]);
+
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L,
+ 0xFF, (u8)byte_cnt);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
+ 0xFF, (u8)(byte_cnt >> 8));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
+
+ 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_read_ppbuf fail (err = %d)\n", err);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int sd_write_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
+ u8 *buf, int buf_len, int timeout)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err, i;
+ u8 trans_mode;
+
+ if (!buf)
+ buf_len = 0;
+
+ if (buf && buf_len) {
+ err = rtsx_pci_write_ppbuf(pcr, buf, buf_len);
+ if (err < 0) {
+ dev_dbg(sdmmc_dev(host),
+ "rtsx_write_ppbuf fail (err = %d)\n", err);
+ return err;
+ }
+ }
+
+ if (cmd)
+ trans_mode = SD_TM_AUTO_WRITE_2;
+ else
+ trans_mode = SD_TM_AUTO_WRITE_3;
+
+ rtsx_pci_init_cmd(pcr);
+
+ if (cmd) {
+ dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d\n", __func__,
+ cmd[0] - 0x40);
+
+ for (i = 0; i < 5; i++)
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+ SD_CMD0 + i, 0xFF, cmd[i]);
+ }
+
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L,
+ 0xFF, (u8)byte_cnt);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H,
+ 0xFF, (u8)(byte_cnt >> 8));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
+
+ 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);
+
+ 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;
+ }
+
+ return 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 stat_idx = 0;
+ u8 rsp_type;
+ int rsp_len = 5;
+
+ 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;
+ rsp_len = 0;
+ break;
+ case MMC_RSP_R1:
+ rsp_type = SD_RSP_TYPE_R1;
+ break;
+ case MMC_RSP_R1B:
+ rsp_type = SD_RSP_TYPE_R1b;
+ break;
+ case MMC_RSP_R2:
+ rsp_type = SD_RSP_TYPE_R2;
+ rsp_len = 16;
+ 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_pci_write_register(pcr, SD_BUS_STAT,
+ 0xFF, SD_CLK_TOGGLE_EN);
+ if (err < 0)
+ goto out;
+ }
+
+ rtsx_pci_init_cmd(pcr);
+
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
+
+ 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);
+ 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_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
+ stat_idx = 5;
+ }
+
+ 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) {
+ 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 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_data *data = mrq->data;
+ int uhs = mmc_sd_card_uhs(card);
+ int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
+ u8 cfg2, trans_mode;
+ int err;
+ size_t data_len = data->blksz * data->blocks;
+
+ if (read) {
+ 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 {
+ 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;
+ }
+
+ if (!uhs)
+ cfg2 |= SD_NO_CHECK_WAIT_CRC_TO;
+
+ rtsx_pci_init_cmd(pcr);
+
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
+ 0xFF, (u8)data->blocks);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
+ 0xFF, (u8)(data->blocks >> 8));
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+ CARD_DATA_SOURCE, 0x01, RING_BUFFER);
+
+ 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);
+ if (read) {
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
+ 0x03 | DMA_PACK_SIZE_MASK,
+ DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
+ } else {
+ 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_TRANSFER, 0xFF,
+ trans_mode | SD_TRANSFER_START);
+ 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_transfer_data(pcr, data->sg,
+ data_len, data->sg_len, read, 10000);
+ if (err < 0) {
+ sd_clear_error(host);
+
+ return err;
+ }
+
+ return 0;
+}
+
+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 _cmd[5], *buf;
+
+ _cmd[0] = 0x40 | (u8)cmd->opcode;
+ put_unaligned_be32(cmd->arg, (u32 *)(&_cmd[1]));
+
+ 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)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err;
+
+ dev_dbg(sdmmc_dev(host), "%s: sample_point = %d\n",
+ __func__, sample_point);
+
+ rtsx_pci_init_cmd(pcr);
+
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPRX_CTL, 0x1F, sample_point);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+ PHASE_NOT_RESET, 0);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+ PHASE_NOT_RESET, PHASE_NOT_RESET);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, 0);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
+ SD_ASYNC_FIFO_NOT_RST, 0);
+
+ err = rtsx_pci_send_cmd(pcr, 100);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static u8 sd_search_final_phase(struct realtek_pci_sdmmc *host, u32 phase_map)
+{
+ struct timing_phase_path path[MAX_PHASE + 1];
+ int i, j, cont_path_cnt;
+ int new_block, max_len, final_path_idx;
+ u8 final_phase = 0xFF;
+
+ /* Parse phase_map, take it as a bit-ring */
+ cont_path_cnt = 0;
+ new_block = 1;
+ j = 0;
+ for (i = 0; i < MAX_PHASE + 1; i++) {
+ if (phase_map & (1 << i)) {
+ if (new_block) {
+ new_block = 0;
+ j = cont_path_cnt++;
+ path[j].start = i;
+ path[j].end = i;
+ } else {
+ path[j].end = i;
+ }
+ } else {
+ new_block = 1;
+ if (cont_path_cnt) {
+ /* Calculate path length and middle point */
+ int idx = cont_path_cnt - 1;
+ path[idx].len =
+ path[idx].end - path[idx].start + 1;
+ path[idx].mid =
+ path[idx].start + path[idx].len / 2;
+ }
+ }
+ }
+
+ if (cont_path_cnt == 0) {
+ dev_dbg(sdmmc_dev(host), "No continuous phase path\n");
+ goto finish;
+ } else {
+ /* Calculate last continuous path length and middle point */
+ int idx = cont_path_cnt - 1;
+ path[idx].len = path[idx].end - path[idx].start + 1;
+ path[idx].mid = path[idx].start + path[idx].len / 2;
+ }
+
+ /* Connect the first continuous path
+ * and the last one if they are adjacent */
+ if (!path[0].start && (path[cont_path_cnt - 1].end == MAX_PHASE)) {
+ /* Using negative index */
+ path[0].start = path[cont_path_cnt - 1].start - MAX_PHASE - 1;
+ path[0].len += path[cont_path_cnt - 1].len;
+ path[0].mid = path[0].start + path[0].len / 2;
+ /* Convert negative middle point index to positive one */
+ if (path[0].mid < 0)
+ path[0].mid += MAX_PHASE + 1;
+ cont_path_cnt--;
+ }
+
+ /* Choose the longest continuous phase path */
+ max_len = 0;
+ final_phase = 0;
+ final_path_idx = 0;
+ for (i = 0; i < cont_path_cnt; i++) {
+ if (path[i].len > max_len) {
+ max_len = path[i].len;
+ final_phase = (u8)path[i].mid;
+ final_path_idx = i;
+ }
+
+ dev_dbg(sdmmc_dev(host), "path[%d].start = %d\n",
+ i, path[i].start);
+ dev_dbg(sdmmc_dev(host), "path[%d].end = %d\n",
+ i, path[i].end);
+ dev_dbg(sdmmc_dev(host), "path[%d].len = %d\n",
+ i, path[i].len);
+ dev_dbg(sdmmc_dev(host), "path[%d].mid = %d\n",
+ i, path[i].mid);
+ }
+
+finish:
+ dev_dbg(sdmmc_dev(host), "Final choosen phase: %d\n", 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;
+ u8 cmd[5] = {0};
+
+ err = sd_change_phase(host, sample_point);
+ if (err < 0)
+ return err;
+
+ cmd[0] = 0x40 | 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);
+ return err;
+ }
+
+ 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 = MAX_PHASE; i >= 0; 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);
+ if (err < 0)
+ return err;
+ } else {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+ struct rtsx_pcr *pcr = host->pcr;
+ struct mmc_command *cmd = mrq->cmd;
+ struct mmc_data *data = mrq->data;
+ unsigned int data_size = 0;
+
+ if (host->eject) {
+ cmd->error = -ENOMEDIUM;
+ goto finish;
+ }
+
+ mutex_lock(&pcr->pcr_mutex);
+
+ rtsx_pci_start_run(pcr);
+
+ 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 || mmc_op_multi(cmd->opcode) ||
+ (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
+ (cmd->opcode == MMC_WRITE_BLOCK)) {
+ sd_send_cmd_get_rsp(host, cmd);
+
+ if (!cmd->error && data_size) {
+ sd_rw_multi(host, mrq);
+
+ 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->error = %d\n", cmd->error);
+
+ 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 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;
+
+ 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_sd_pull_ctl_enable(pcr);
+ if (err < 0)
+ return err;
+
+ rtsx_pci_init_cmd(pcr);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+ SD_POWER_MASK, SD_PARTIAL_POWER_ON);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+ LDO3318_PWR_MASK, pcr->rval.ldo_pwr_suspend);
+ err = rtsx_pci_send_cmd(pcr, 100);
+ if (err < 0)
+ return err;
+
+ /* To avoid too large in-rush current */
+ udelay(150);
+
+ rtsx_pci_init_cmd(pcr);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+ SD_POWER_MASK, SD_POWER_ON);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+ LDO3318_PWR_MASK, pcr->rval.ldo_pwr_on);
+ err = rtsx_pci_send_cmd(pcr, 100);
+ if (err < 0)
+ return err;
+
+ err = rtsx_pci_write_register(pcr, CARD_OE,
+ SD_OUTPUT_EN, SD_OUTPUT_EN);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int sd_power_off(struct realtek_pci_sdmmc *host)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err;
+
+ 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);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+ SD_POWER_MASK | PMOS_STRG_MASK,
+ SD_POWER_OFF | PMOS_STRG_400mA);
+ rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+ LDO3318_PWR_MASK, pcr->rval.ldo_pwr_off);
+
+ err = rtsx_pci_send_cmd(pcr, 100);
+ if (err < 0)
+ return err;
+
+ return rtsx_pci_sd_pull_ctl_disable(pcr);
+}
+
+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, bool *ddr_mode)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err = 0;
+
+ *ddr_mode = false;
+
+ 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_UHS_DDR50:
+ *ddr_mode = true;
+
+ 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;
+ bool vpclk = false, double_clk = true;
+ u8 ssc_depth;
+
+ if (host->eject)
+ 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->ddr_mode);
+
+ switch (ios->timing) {
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_UHS_SDR50:
+ ssc_depth = RTSX_SSC_DEPTH_2M;
+ vpclk = true;
+ double_clk = false;
+ break;
+
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_UHS_SDR25:
+ ssc_depth = RTSX_SSC_DEPTH_1M;
+ break;
+
+ default:
+ ssc_depth = RTSX_SSC_DEPTH_500K;
+ break;
+ }
+
+ if (ios->clock <= 1000000)
+ host->initial_mode = true;
+ else
+ host->initial_mode = false;
+
+ rtsx_pci_switch_clock(pcr, ios->clock, ssc_depth,
+ host->initial_mode, double_clk, 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 Machanical 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 -ENOMEDIUM;
+
+ mutex_lock(&pcr->pcr_mutex);
+
+ rtsx_pci_start_run(pcr);
+
+ /* Check SD Machanical 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_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 sd_change_bank_voltage(struct realtek_pci_sdmmc *host, u8 voltage)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int err;
+
+ if (voltage == SD_IO_3V3) {
+ err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
+ if (err < 0)
+ return err;
+ } else if (voltage == SD_IO_1V8) {
+ err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
+ if (err < 0)
+ return err;
+ } else {
+ 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;
+
+ mutex_lock(&pcr->pcr_mutex);
+
+ rtsx_pci_start_run(pcr);
+
+ if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
+ voltage = SD_IO_3V3;
+ else
+ voltage = SD_IO_1V8;
+
+ if (voltage == SD_IO_1V8) {
+ err = rtsx_pci_write_register(pcr,
+ SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B);
+ if (err < 0)
+ goto out;
+
+ err = sd_wait_voltage_stable_1(host);
+ if (err < 0)
+ goto out;
+ }
+
+ err = sd_change_bank_voltage(host, voltage);
+ if (err < 0)
+ goto out;
+
+ if (voltage == SD_IO_1V8) {
+ err = sd_wait_voltage_stable_2(host);
+ if (err < 0)
+ goto 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);
+
+out:
+ 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;
+
+ mutex_lock(&pcr->pcr_mutex);
+
+ rtsx_pci_start_run(pcr);
+
+ if (!host->ddr_mode)
+ err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
+
+ mutex_unlock(&pcr->pcr_mutex);
+
+ return err;
+}
+
+static const struct mmc_host_ops realtek_pci_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,
+ .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->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_blk_size = RTSX_MAX_BLOCK_LENGTH;
+ mmc->max_blk_count = RTSX_MAX_BLOCK_COUNT;
+ mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count;
+ mmc->max_req_size = mmc->max_seg_size;
+}
+
+static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
+{
+ struct mmc_host *mmc;
+ struct realtek_pci_sdmmc *host;
+ struct rtsx_pcr *pcr = platform_get_drvdata(pdev);
+
+ dev_dbg(&(pdev->dev),
+ ": Realtek PCI-E SDMMC controller found\n");
+
+ if (!pcr)
+ return -ENXIO;
+
+ mmc = mmc_alloc_host(sizeof(*host), &pcr->pci->dev);
+ if (!mmc)
+ return -ENOMEM;
+
+ host = mmc_priv(mmc);
+ host->pcr = pcr;
+ host->mmc = mmc;
+ host->pdev = pdev;
+ platform_set_drvdata(pdev, host);
+
+ 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;
+ mmc = host->mmc;
+ host->eject = true;
+
+ 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);
+ mmc_free_host(mmc);
+
+ platform_set_drvdata(pdev, NULL);
+
+ dev_dbg(&(pdev->dev),
+ ": Realtek PCI-E SDMMC controller has been removed\n");
+
+ return 0;
+}
+
+static 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 = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME_RTSX_PCI_SDMMC,
+ },
+};
+
+static int __init realtek_pci_sdmmc_drv_init(void)
+{
+ return platform_driver_register(&rtsx_pci_sdmmc_driver);
+}
+
+static void __exit realtek_pci_sdmmc_drv_exit(void)
+{
+ platform_driver_unregister(&rtsx_pci_sdmmc_driver);
+}
+
+module_init(realtek_pci_sdmmc_drv_init);
+module_exit(realtek_pci_sdmmc_drv_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Realtek Corp.");
+MODULE_DESCRIPTION("Realtek PCI-E SD/MMC Card Host Driver");
--
1.7.9.5
--
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