drivers/memstick: Add realtek pcie memstick host driver
Wei WANG [Fri, 9 Nov 2012 12:53:35 +0000 (20:53 +0800)]
Realtek PCI-E Memstick card host driver is used to access Memstick
card, with the help of Realtek PCI-E card reader MFD driver.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Acked-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/memstick/host/Kconfig
drivers/memstick/host/Makefile
drivers/memstick/host/rtsx_pci_ms.c [new file with mode: 0644]

index cc0997a..4f7a17f 100644 (file)
@@ -42,3 +42,13 @@ config MEMSTICK_R592
 
          To compile this driver as a module, choose M here: the module will
          be called r592.
+
+config MEMSTICK_REALTEK_PCI
+       tristate "Realtek PCI-E Memstick Card Interface Driver"
+       depends on MFD_RTSX_PCI
+       help
+         Say Y here to include driver code to support Memstick card interface
+         of Realtek PCI-E card reader
+
+         To compile this driver as a module, choose M here: the module will
+         be called rtsx_pci_ms.
index 31ba8d3..af3459d 100644 (file)
@@ -5,3 +5,4 @@
 obj-$(CONFIG_MEMSTICK_TIFM_MS)         += tifm_ms.o
 obj-$(CONFIG_MEMSTICK_JMICRON_38X)     += jmb38x_ms.o
 obj-$(CONFIG_MEMSTICK_R592)            += r592.o
+obj-$(CONFIG_MEMSTICK_REALTEK_PCI)     += rtsx_pci_ms.o
diff --git a/drivers/memstick/host/rtsx_pci_ms.c b/drivers/memstick/host/rtsx_pci_ms.c
new file mode 100644 (file)
index 0000000..f5ddb82
--- /dev/null
@@ -0,0 +1,641 @@
+/* Realtek PCI-Express Memstick 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@realsil.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/memstick.h>
+#include <linux/mfd/rtsx_pci.h>
+#include <asm/unaligned.h>
+
+struct realtek_pci_ms {
+       struct platform_device  *pdev;
+       struct rtsx_pcr         *pcr;
+       struct memstick_host    *msh;
+       struct memstick_request *req;
+
+       struct mutex            host_mutex;
+       struct work_struct      handle_req;
+
+       u8                      ssc_depth;
+       unsigned int            clock;
+       unsigned char           ifmode;
+       bool                    eject;
+};
+
+static inline struct device *ms_dev(struct realtek_pci_ms *host)
+{
+       return &(host->pdev->dev);
+}
+
+static inline void ms_clear_error(struct realtek_pci_ms *host)
+{
+       rtsx_pci_write_register(host->pcr, CARD_STOP,
+                       MS_STOP | MS_CLR_ERR, MS_STOP | MS_CLR_ERR);
+}
+
+#ifdef DEBUG
+
+static void ms_print_debug_regs(struct realtek_pci_ms *host)
+{
+       struct rtsx_pcr *pcr = host->pcr;
+       u16 i;
+       u8 *ptr;
+
+       /* Print MS host internal registers */
+       rtsx_pci_init_cmd(pcr);
+       for (i = 0xFD40; i <= 0xFD44; 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 = 0xFD40; i <= 0xFD44; i++)
+               dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+       for (i = 0xFD52; i <= 0xFD69; i++)
+               dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+}
+
+#else
+
+#define ms_print_debug_regs(host)
+
+#endif
+
+static int ms_power_on(struct realtek_pci_ms *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, MS_MOD_SEL);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,
+                       CARD_SHARE_MASK, CARD_SHARE_48_MS);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN,
+                       MS_CLK_EN, MS_CLK_EN);
+       err = rtsx_pci_send_cmd(pcr, 100);
+       if (err < 0)
+               return err;
+
+       err = rtsx_pci_card_pull_ctl_enable(pcr, RTSX_MS_CARD);
+       if (err < 0)
+               return err;
+
+       err = rtsx_pci_card_power_on(pcr, RTSX_MS_CARD);
+       if (err < 0)
+               return err;
+
+       /* Wait ms power stable */
+       msleep(150);
+
+       err = rtsx_pci_write_register(pcr, CARD_OE,
+                       MS_OUTPUT_EN, MS_OUTPUT_EN);
+       if (err < 0)
+               return err;
+
+       return 0;
+}
+
+static int ms_power_off(struct realtek_pci_ms *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, MS_CLK_EN, 0);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
+
+       err = rtsx_pci_send_cmd(pcr, 100);
+       if (err < 0)
+               return err;
+
+       err = rtsx_pci_card_power_off(pcr, RTSX_MS_CARD);
+       if (err < 0)
+               return err;
+
+       return rtsx_pci_card_pull_ctl_disable(pcr, RTSX_MS_CARD);
+}
+
+static int ms_transfer_data(struct realtek_pci_ms *host, unsigned char data_dir,
+               u8 tpc, u8 cfg, struct scatterlist *sg)
+{
+       struct rtsx_pcr *pcr = host->pcr;
+       int err;
+       unsigned int length = sg->length;
+       u16 sec_cnt = (u16)(length / 512);
+       u8 val, trans_mode, dma_dir;
+
+       dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
+                       __func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
+                       length);
+
+       if (data_dir == READ) {
+               dma_dir = DMA_DIR_FROM_CARD;
+               trans_mode = MS_TM_AUTO_READ;
+       } else {
+               dma_dir = DMA_DIR_TO_CARD;
+               trans_mode = MS_TM_AUTO_WRITE;
+       }
+
+       rtsx_pci_init_cmd(pcr);
+
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
+                       0xFF, (u8)(sec_cnt >> 8));
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
+                       0xFF, (u8)sec_cnt);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+
+       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)(length >> 24));
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC2, 0xFF, (u8)(length >> 16));
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC1, 0xFF, (u8)(length >> 8));
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMATC0, 0xFF, (u8)length);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, DMACTL,
+                       0x03 | DMA_PACK_SIZE_MASK, dma_dir | 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, MS_TRANSFER,
+                       0xFF, MS_TRANSFER_START | trans_mode);
+       rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
+                       MS_TRANSFER_END, MS_TRANSFER_END);
+
+       rtsx_pci_send_cmd_no_wait(pcr);
+
+       err = rtsx_pci_transfer_data(pcr, sg, 1, data_dir == READ, 10000);
+       if (err < 0) {
+               ms_clear_error(host);
+               return err;
+       }
+
+       rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
+       if (val & (MS_INT_CMDNK | MS_INT_ERR | MS_CRC16_ERR | MS_RDY_TIMEOUT))
+               return -EIO;
+
+       return 0;
+}
+
+static int ms_write_bytes(struct realtek_pci_ms *host, u8 tpc,
+               u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+       struct rtsx_pcr *pcr = host->pcr;
+       int err, i;
+
+       dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+       if (!data)
+               return -EINVAL;
+
+       rtsx_pci_init_cmd(pcr);
+
+       for (i = 0; i < cnt; i++)
+               rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+                               PPBUF_BASE2 + i, 0xFF, data[i]);
+       if (cnt % 2)
+               rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+                               PPBUF_BASE2 + i, 0xFF, 0xFF);
+
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+                       0x01, PINGPONG_BUFFER);
+
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER,
+                       0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
+       rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
+                       MS_TRANSFER_END, MS_TRANSFER_END);
+       if (int_reg)
+               rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+       err = rtsx_pci_send_cmd(pcr, 5000);
+       if (err < 0) {
+               u8 val;
+
+               rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
+               dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
+
+               if (int_reg)
+                       *int_reg = val & 0x0F;
+
+               ms_print_debug_regs(host);
+
+               ms_clear_error(host);
+
+               if (!(tpc & 0x08)) {
+                       if (val & MS_CRC16_ERR)
+                               return -EIO;
+               } else {
+                       if (!(val & 0x80)) {
+                               if (val & (MS_INT_ERR | MS_INT_CMDNK))
+                                       return -EIO;
+                       }
+               }
+
+               return -ETIMEDOUT;
+       }
+
+       if (int_reg) {
+               u8 *ptr = rtsx_pci_get_cmd_data(pcr) + 1;
+               *int_reg = *ptr & 0x0F;
+       }
+
+       return 0;
+}
+
+static int ms_read_bytes(struct realtek_pci_ms *host, u8 tpc,
+               u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+       struct rtsx_pcr *pcr = host->pcr;
+       int err, i;
+       u8 *ptr;
+
+       dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+       if (!data)
+               return -EINVAL;
+
+       rtsx_pci_init_cmd(pcr);
+
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+                       0x01, PINGPONG_BUFFER);
+
+       rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, MS_TRANSFER,
+                       0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
+       rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, MS_TRANSFER,
+                       MS_TRANSFER_END, MS_TRANSFER_END);
+       for (i = 0; i < cnt - 1; i++)
+               rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
+       if (cnt % 2)
+               rtsx_pci_add_cmd(pcr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
+       else
+               rtsx_pci_add_cmd(pcr, READ_REG_CMD,
+                               PPBUF_BASE2 + cnt - 1, 0, 0);
+       if (int_reg)
+               rtsx_pci_add_cmd(pcr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+       err = rtsx_pci_send_cmd(pcr, 5000);
+       if (err < 0) {
+               u8 val;
+
+               rtsx_pci_read_register(pcr, MS_TRANS_CFG, &val);
+               dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
+
+               if (int_reg)
+                       *int_reg = val & 0x0F;
+
+               ms_print_debug_regs(host);
+
+               ms_clear_error(host);
+
+               if (!(tpc & 0x08)) {
+                       if (val & MS_CRC16_ERR)
+                               return -EIO;
+               } else {
+                       if (!(val & 0x80)) {
+                               if (val & (MS_INT_ERR | MS_INT_CMDNK))
+                                       return -EIO;
+                       }
+               }
+
+               return -ETIMEDOUT;
+       }
+
+       ptr = rtsx_pci_get_cmd_data(pcr) + 1;
+       for (i = 0; i < cnt; i++)
+               data[i] = *ptr++;
+
+       if (int_reg)
+               *int_reg = *ptr & 0x0F;
+
+       return 0;
+}
+
+static int rtsx_pci_ms_issue_cmd(struct realtek_pci_ms *host)
+{
+       struct memstick_request *req = host->req;
+       int err = 0;
+       u8 cfg = 0, int_reg;
+
+       dev_dbg(ms_dev(host), "%s\n", __func__);
+
+       if (req->need_card_int) {
+               if (host->ifmode != MEMSTICK_SERIAL)
+                       cfg = WAIT_INT;
+       }
+
+       if (req->long_data) {
+               err = ms_transfer_data(host, req->data_dir,
+                               req->tpc, cfg, &(req->sg));
+       } else {
+               if (req->data_dir == READ) {
+                       err = ms_read_bytes(host, req->tpc, cfg,
+                                       req->data_len, req->data, &int_reg);
+               } else {
+                       err = ms_write_bytes(host, req->tpc, cfg,
+                                       req->data_len, req->data, &int_reg);
+               }
+       }
+       if (err < 0)
+               return err;
+
+       if (req->need_card_int && (host->ifmode == MEMSTICK_SERIAL)) {
+               err = ms_read_bytes(host, MS_TPC_GET_INT,
+                               NO_WAIT_INT, 1, &int_reg, NULL);
+               if (err < 0)
+                       return err;
+       }
+
+       if (req->need_card_int) {
+               dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", int_reg);
+
+               if (int_reg & MS_INT_CMDNK)
+                       req->int_reg |= MEMSTICK_INT_CMDNAK;
+               if (int_reg & MS_INT_BREQ)
+                       req->int_reg |= MEMSTICK_INT_BREQ;
+               if (int_reg & MS_INT_ERR)
+                       req->int_reg |= MEMSTICK_INT_ERR;
+               if (int_reg & MS_INT_CED)
+                       req->int_reg |= MEMSTICK_INT_CED;
+       }
+
+       return 0;
+}
+
+static void rtsx_pci_ms_handle_req(struct work_struct *work)
+{
+       struct realtek_pci_ms *host = container_of(work,
+                       struct realtek_pci_ms, handle_req);
+       struct rtsx_pcr *pcr = host->pcr;
+       struct memstick_host *msh = host->msh;
+       int rc;
+
+       mutex_lock(&pcr->pcr_mutex);
+
+       rtsx_pci_start_run(pcr);
+
+       rtsx_pci_switch_clock(host->pcr, host->clock, host->ssc_depth,
+                       false, true, false);
+       rtsx_pci_write_register(pcr, CARD_SELECT, 0x07, MS_MOD_SEL);
+       rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
+                       CARD_SHARE_MASK, CARD_SHARE_48_MS);
+
+       if (!host->req) {
+               do {
+                       rc = memstick_next_req(msh, &host->req);
+                       dev_dbg(ms_dev(host), "next req %d\n", rc);
+
+                       if (!rc)
+                               host->req->error = rtsx_pci_ms_issue_cmd(host);
+               } while (!rc);
+       }
+
+       mutex_unlock(&pcr->pcr_mutex);
+}
+
+static void rtsx_pci_ms_request(struct memstick_host *msh)
+{
+       struct realtek_pci_ms *host = memstick_priv(msh);
+
+       dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+       schedule_work(&host->handle_req);
+}
+
+static int rtsx_pci_ms_set_param(struct memstick_host *msh,
+               enum memstick_param param, int value)
+{
+       struct realtek_pci_ms *host = memstick_priv(msh);
+       struct rtsx_pcr *pcr = host->pcr;
+       unsigned int clock = 0;
+       u8 ssc_depth = 0;
+       int err;
+
+       dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
+                       __func__, param, value);
+
+       switch (param) {
+       case MEMSTICK_POWER:
+               if (value == MEMSTICK_POWER_ON)
+                       err = ms_power_on(host);
+               else if (value == MEMSTICK_POWER_OFF)
+                       err = ms_power_off(host);
+               else
+                       return -EINVAL;
+               break;
+
+       case MEMSTICK_INTERFACE:
+               if (value == MEMSTICK_SERIAL) {
+                       clock = 19000000;
+                       ssc_depth = RTSX_SSC_DEPTH_500K;
+
+                       err = rtsx_pci_write_register(pcr, MS_CFG,
+                                       0x18, MS_BUS_WIDTH_1);
+                       if (err < 0)
+                               return err;
+               } else if (value == MEMSTICK_PAR4) {
+                       clock = 39000000;
+                       ssc_depth = RTSX_SSC_DEPTH_1M;
+
+                       err = rtsx_pci_write_register(pcr, MS_CFG,
+                                       0x58, MS_BUS_WIDTH_4 | PUSH_TIME_ODD);
+                       if (err < 0)
+                               return err;
+               } else {
+                       return -EINVAL;
+               }
+
+               err = rtsx_pci_switch_clock(pcr, clock,
+                               ssc_depth, false, true, false);
+               if (err < 0)
+                       return err;
+
+               host->ssc_depth = ssc_depth;
+               host->clock = clock;
+               host->ifmode = value;
+               break;
+       }
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int rtsx_pci_ms_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       struct realtek_pci_ms *host = platform_get_drvdata(pdev);
+       struct memstick_host *msh = host->msh;
+
+       dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+       memstick_suspend_host(msh);
+       return 0;
+}
+
+static int rtsx_pci_ms_resume(struct platform_device *pdev)
+{
+       struct realtek_pci_ms *host = platform_get_drvdata(pdev);
+       struct memstick_host *msh = host->msh;
+
+       dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+       memstick_resume_host(msh);
+       return 0;
+}
+
+#else /* CONFIG_PM */
+
+#define rtsx_pci_ms_suspend NULL
+#define rtsx_pci_ms_resume NULL
+
+#endif /* CONFIG_PM */
+
+static void rtsx_pci_ms_card_event(struct platform_device *pdev)
+{
+       struct realtek_pci_ms *host = platform_get_drvdata(pdev);
+
+       memstick_detect_change(host->msh);
+}
+
+static int rtsx_pci_ms_drv_probe(struct platform_device *pdev)
+{
+       struct memstick_host *msh;
+       struct realtek_pci_ms *host;
+       struct rtsx_pcr *pcr;
+       struct pcr_handle *handle = pdev->dev.platform_data;
+       int rc;
+
+       if (!handle)
+               return -ENXIO;
+
+       pcr = handle->pcr;
+       if (!pcr)
+               return -ENXIO;
+
+       dev_dbg(&(pdev->dev),
+                       ": Realtek PCI-E Memstick controller found\n");
+
+       msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
+       if (!msh)
+               return -ENOMEM;
+
+       host = memstick_priv(msh);
+       host->pcr = pcr;
+       host->msh = msh;
+       host->pdev = pdev;
+       platform_set_drvdata(pdev, host);
+       pcr->slots[RTSX_MS_CARD].p_dev = pdev;
+       pcr->slots[RTSX_MS_CARD].card_event = rtsx_pci_ms_card_event;
+
+       mutex_init(&host->host_mutex);
+
+       INIT_WORK(&host->handle_req, rtsx_pci_ms_handle_req);
+       msh->request = rtsx_pci_ms_request;
+       msh->set_param = rtsx_pci_ms_set_param;
+       msh->caps = MEMSTICK_CAP_PAR4;
+
+       rc = memstick_add_host(msh);
+       if (rc) {
+               memstick_free_host(msh);
+               return rc;
+       }
+
+       return 0;
+}
+
+static int rtsx_pci_ms_drv_remove(struct platform_device *pdev)
+{
+       struct realtek_pci_ms *host = platform_get_drvdata(pdev);
+       struct rtsx_pcr *pcr;
+       struct memstick_host *msh;
+       int rc;
+
+       if (!host)
+               return 0;
+
+       pcr = host->pcr;
+       pcr->slots[RTSX_MS_CARD].p_dev = NULL;
+       pcr->slots[RTSX_MS_CARD].card_event = NULL;
+       msh = host->msh;
+       host->eject = true;
+
+       mutex_lock(&host->host_mutex);
+       if (host->req) {
+               dev_dbg(&(pdev->dev),
+                       "%s: Controller removed during transfer\n",
+                       dev_name(&msh->dev));
+
+               rtsx_pci_complete_unfinished_transfer(pcr);
+
+               host->req->error = -ENOMEDIUM;
+               do {
+                       rc = memstick_next_req(msh, &host->req);
+                       if (!rc)
+                               host->req->error = -ENOMEDIUM;
+               } while (!rc);
+       }
+       mutex_unlock(&host->host_mutex);
+
+       memstick_remove_host(msh);
+       memstick_free_host(msh);
+
+       platform_set_drvdata(pdev, NULL);
+
+       dev_dbg(&(pdev->dev),
+               ": Realtek PCI-E Memstick controller has been removed\n");
+
+       return 0;
+}
+
+static struct platform_device_id rtsx_pci_ms_ids[] = {
+       {
+               .name = DRV_NAME_RTSX_PCI_MS,
+       }, {
+               /* sentinel */
+       }
+};
+MODULE_DEVICE_TABLE(platform, rtsx_pci_ms_ids);
+
+static struct platform_driver rtsx_pci_ms_driver = {
+       .probe          = rtsx_pci_ms_drv_probe,
+       .remove         = rtsx_pci_ms_drv_remove,
+       .id_table       = rtsx_pci_ms_ids,
+       .suspend        = rtsx_pci_ms_suspend,
+       .resume         = rtsx_pci_ms_resume,
+       .driver         = {
+               .owner  = THIS_MODULE,
+               .name   = DRV_NAME_RTSX_PCI_MS,
+       },
+};
+module_platform_driver(rtsx_pci_ms_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
+MODULE_DESCRIPTION("Realtek PCI-E Memstick Card Host Driver");