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Subject[PATCH v5 3/3] memstick: Add realtek USB memstick host driver
Date
From: Roger Tseng <rogerable@realtek.com>

Realtek USB memstick host driver provides memstick host support based on the
Realtek USB card reader MFD driver.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
---
drivers/memstick/host/Kconfig | 10 +
drivers/memstick/host/Makefile | 1 +
drivers/memstick/host/rtsx_usb_ms.c | 839 ++++++++++++++++++++++++++++++++++++
3 files changed, 850 insertions(+)
create mode 100644 drivers/memstick/host/rtsx_usb_ms.c

diff --git a/drivers/memstick/host/Kconfig b/drivers/memstick/host/Kconfig
index 1b37cf8..7310e32 100644
--- a/drivers/memstick/host/Kconfig
+++ b/drivers/memstick/host/Kconfig
@@ -52,3 +52,13 @@ config MEMSTICK_REALTEK_PCI

To compile this driver as a module, choose M here: the module will
be called rtsx_pci_ms.
+
+config MEMSTICK_REALTEK_USB
+ tristate "Realtek USB Memstick Card Interface Driver"
+ depends on MFD_RTSX_USB
+ help
+ Say Y here to include driver code to support Memstick card interface
+ of Realtek RTS5129/39 series USB card reader
+
+ To compile this driver as a module, choose M here: the module will
+ be called rts5139_ms.
diff --git a/drivers/memstick/host/Makefile b/drivers/memstick/host/Makefile
index af3459d..491c955 100644
--- a/drivers/memstick/host/Makefile
+++ b/drivers/memstick/host/Makefile
@@ -6,3 +6,4 @@ 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
+obj-$(CONFIG_MEMSTICK_REALTEK_USB) += rtsx_usb_ms.o
diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
new file mode 100644
index 0000000..a7282b7
--- /dev/null
+++ b/drivers/memstick/host/rtsx_usb_ms.c
@@ -0,0 +1,839 @@
+/* Realtek USB Memstick Card Interface driver
+ *
+ * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ * Roger Tseng <rogerable@realtek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/memstick.h>
+#include <linux/kthread.h>
+#include <linux/mfd/rtsx_usb.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/completion.h>
+#include <asm/unaligned.h>
+
+struct rtsx_usb_ms {
+ struct platform_device *pdev;
+ struct rtsx_ucr *ucr;
+ struct memstick_host *msh;
+ struct memstick_request *req;
+
+ struct mutex host_mutex;
+ struct work_struct handle_req;
+
+ struct task_struct *detect_ms;
+ struct completion detect_ms_exit;
+
+ u8 ssc_depth;
+ unsigned int clock;
+ int power_mode;
+ unsigned char ifmode;
+ bool eject;
+};
+
+static inline struct device *ms_dev(struct rtsx_usb_ms *host)
+{
+ return &(host->pdev->dev);
+}
+
+static inline void ms_clear_error(struct rtsx_usb_ms *host)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ rtsx_usb_ep0_write_register(ucr, CARD_STOP,
+ MS_STOP | MS_CLR_ERR,
+ MS_STOP | MS_CLR_ERR);
+
+ rtsx_usb_clear_dma_err(ucr);
+ rtsx_usb_clear_fsm_err(ucr);
+}
+
+#ifdef DEBUG
+
+static void ms_print_debug_regs(struct rtsx_usb_ms *host)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ u16 i;
+ u8 *ptr;
+
+ /* Print MS host internal registers */
+ rtsx_usb_init_cmd(ucr);
+
+ /* MS_CFG to MS_INT_REG */
+ for (i = 0xFD40; i <= 0xFD44; i++)
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+ /* CARD_SHARE_MODE to CARD_GPIO */
+ for (i = 0xFD51; i <= 0xFD56; i++)
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+ /* CARD_PULL_CTLx */
+ for (i = 0xFD60; i <= 0xFD65; i++)
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+ /* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0);
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0);
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0);
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0);
+
+ rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+ rtsx_usb_get_rsp(ucr, 21, 100);
+
+ ptr = ucr->rsp_buf;
+ for (i = 0xFD40; i <= 0xFD44; i++)
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+ for (i = 0xFD51; i <= 0xFD56; i++)
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+ for (i = 0xFD60; i <= 0xFD65; i++)
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++));
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++));
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++));
+ dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++));
+}
+
+#else
+
+static void ms_print_debug_regs(struct rtsx_usb_ms *host)
+{
+}
+
+#endif
+
+static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
+{
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+ return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
+{
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
+
+ return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
+{
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+ return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
+{
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
+
+ return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_power_on(struct rtsx_usb_ms *host)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ int err;
+
+ dev_dbg(ms_dev(host), "%s\n", __func__);
+
+ rtsx_usb_init_cmd(ucr);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
+ CARD_SHARE_MASK, CARD_SHARE_MS);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
+ MS_CLK_EN, MS_CLK_EN);
+ err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+ if (err < 0)
+ return err;
+
+ if (CHECK_PKG(ucr, LQFP48))
+ err = ms_pull_ctl_enable_lqfp48(ucr);
+ else
+ err = ms_pull_ctl_enable_qfn24(ucr);
+ if (err < 0)
+ return err;
+
+ err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
+ POWER_MASK, PARTIAL_POWER_ON);
+ if (err)
+ return err;
+
+ usleep_range(800, 1000);
+
+ rtsx_usb_init_cmd(ucr);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
+ POWER_MASK, POWER_ON);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
+ MS_OUTPUT_EN, MS_OUTPUT_EN);
+
+ return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_power_off(struct rtsx_usb_ms *host)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ int err;
+
+ dev_dbg(ms_dev(host), "%s\n", __func__);
+
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
+
+ err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+ if (err < 0)
+ return err;
+
+ if (CHECK_PKG(ucr, LQFP48))
+ return ms_pull_ctl_disable_lqfp48(ucr);
+
+ return ms_pull_ctl_disable_qfn24(ucr);
+}
+
+static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir,
+ u8 tpc, u8 cfg, struct scatterlist *sg)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ int err;
+ unsigned int length = sg->length;
+ u16 sec_cnt = (u16)(length / 512);
+ u8 trans_mode, dma_dir, flag;
+ unsigned int pipe;
+ struct memstick_dev *card = host->msh->card;
+
+ 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) {
+ flag = MODE_CDIR;
+ dma_dir = DMA_DIR_FROM_CARD;
+ if (card->id.type != MEMSTICK_TYPE_PRO)
+ trans_mode = MS_TM_NORMAL_READ;
+ else
+ trans_mode = MS_TM_AUTO_READ;
+ pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
+ } else {
+ flag = MODE_CDOR;
+ dma_dir = DMA_DIR_TO_CARD;
+ if (card->id.type != MEMSTICK_TYPE_PRO)
+ trans_mode = MS_TM_NORMAL_WRITE;
+ else
+ trans_mode = MS_TM_AUTO_WRITE;
+ pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
+ }
+
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+ if (card->id.type == MEMSTICK_TYPE_PRO) {
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
+ 0xFF, (u8)(sec_cnt >> 8));
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
+ 0xFF, (u8)sec_cnt);
+ }
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
+ 0xFF, (u8)(length >> 24));
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
+ 0xFF, (u8)(length >> 16));
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
+ 0xFF, (u8)(length >> 8));
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF,
+ (u8)length);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
+ 0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+ 0x01, RING_BUFFER);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+ 0xFF, MS_TRANSFER_START | trans_mode);
+ rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+ MS_TRANSFER_END, MS_TRANSFER_END);
+
+ err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100);
+ if (err)
+ return err;
+
+ err = rtsx_usb_transfer_data(ucr, pipe, sg, length,
+ 1, NULL, 10000);
+ if (err)
+ goto err_out;
+
+ err = rtsx_usb_get_rsp(ucr, 3, 15000);
+ if (err)
+ goto err_out;
+
+ if (ucr->rsp_buf[0] & MS_TRANSFER_ERR ||
+ ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) {
+ err = -EIO;
+ goto err_out;
+ }
+ return 0;
+err_out:
+ ms_clear_error(host);
+ return err;
+}
+
+static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc,
+ u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ int err, i;
+
+ dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+ rtsx_usb_init_cmd(ucr);
+
+ for (i = 0; i < cnt; i++)
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+ PPBUF_BASE2 + i, 0xFF, data[i]);
+
+ if (cnt % 2)
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+ PPBUF_BASE2 + i, 0xFF, 0xFF);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+ 0x01, PINGPONG_BUFFER);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+ 0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
+ rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+ MS_TRANSFER_END, MS_TRANSFER_END);
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+ err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+ if (err)
+ return err;
+
+ err = rtsx_usb_get_rsp(ucr, 2, 5000);
+ if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
+ u8 val;
+
+ rtsx_usb_ep0_read_register(ucr, 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)
+ *int_reg = ucr->rsp_buf[1] & 0x0F;
+
+ return 0;
+}
+
+static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc,
+ u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+ struct rtsx_ucr *ucr = host->ucr;
+ int err, i;
+ u8 *ptr;
+
+ dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+ rtsx_usb_init_cmd(ucr);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+ 0x01, PINGPONG_BUFFER);
+
+ rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+ 0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
+ rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+ MS_TRANSFER_END, MS_TRANSFER_END);
+ for (i = 0; i < cnt - 1; i++)
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
+ if (cnt % 2)
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
+ else
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD,
+ PPBUF_BASE2 + cnt - 1, 0, 0);
+
+ rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+ err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+ if (err)
+ return err;
+
+ err = rtsx_usb_get_rsp(ucr, cnt + 2, 5000);
+ if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
+ u8 val;
+
+ rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
+ dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
+
+ if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
+ *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 = ucr->rsp_buf + 1;
+ for (i = 0; i < cnt; i++)
+ data[i] = *ptr++;
+
+
+ if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
+ *int_reg = *ptr & 0x0F;
+
+ return 0;
+}
+
+static int rtsx_usb_ms_issue_cmd(struct rtsx_usb_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) {
+ if (host->ifmode == MEMSTICK_SERIAL) {
+ err = ms_read_bytes(host, MS_TPC_GET_INT,
+ NO_WAIT_INT, 1, &req->int_reg, NULL);
+ if (err < 0)
+ return err;
+ } else {
+
+ 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;
+ }
+ dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", req->int_reg);
+ }
+
+ return 0;
+}
+
+static void rtsx_usb_ms_handle_req(struct work_struct *work)
+{
+ struct rtsx_usb_ms *host = container_of(work,
+ struct rtsx_usb_ms, handle_req);
+ struct rtsx_ucr *ucr = host->ucr;
+ struct memstick_host *msh = host->msh;
+ int rc;
+
+ if (!host->req) {
+ do {
+ rc = memstick_next_req(msh, &host->req);
+ dev_dbg(ms_dev(host), "next req %d\n", rc);
+
+ if (!rc) {
+ mutex_lock(&ucr->dev_mutex);
+
+ if (rtsx_usb_card_exclusive_check(ucr,
+ RTSX_USB_MS_CARD))
+ host->req->error = -EIO;
+ else
+ host->req->error =
+ rtsx_usb_ms_issue_cmd(host);
+
+ mutex_unlock(&ucr->dev_mutex);
+
+ dev_dbg(ms_dev(host), "req result %d\n",
+ host->req->error);
+ }
+ } while (!rc);
+ }
+
+}
+
+static void rtsx_usb_ms_request(struct memstick_host *msh)
+{
+ struct rtsx_usb_ms *host = memstick_priv(msh);
+
+ dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+ if (!host->eject)
+ schedule_work(&host->handle_req);
+}
+
+static int rtsx_usb_ms_set_param(struct memstick_host *msh,
+ enum memstick_param param, int value)
+{
+ struct rtsx_usb_ms *host = memstick_priv(msh);
+ struct rtsx_ucr *ucr = host->ucr;
+ unsigned int clock = 0;
+ u8 ssc_depth = 0;
+ int err;
+
+ dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
+ __func__, param, value);
+
+ mutex_lock(&ucr->dev_mutex);
+
+ err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
+ if (err)
+ goto out;
+
+ switch (param) {
+ case MEMSTICK_POWER:
+ if (value == host->power_mode)
+ break;
+
+ if (value == MEMSTICK_POWER_ON) {
+ pm_runtime_get_sync(ms_dev(host));
+ err = ms_power_on(host);
+ } else if (value == MEMSTICK_POWER_OFF) {
+ err = ms_power_off(host);
+ if (host->msh->card)
+ pm_runtime_put_noidle(ms_dev(host));
+ else
+ pm_runtime_put(ms_dev(host));
+ } else
+ err = -EINVAL;
+ if (!err)
+ host->power_mode = value;
+ break;
+
+ case MEMSTICK_INTERFACE:
+ if (value == MEMSTICK_SERIAL) {
+ clock = 19000000;
+ ssc_depth = SSC_DEPTH_512K;
+ err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
+ MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
+ if (err < 0)
+ break;
+ } else if (value == MEMSTICK_PAR4) {
+ clock = 39000000;
+ ssc_depth = SSC_DEPTH_1M;
+
+ err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
+ MS_BUS_WIDTH_4 | PUSH_TIME_ODD |
+ MS_NO_CHECK_INT);
+ if (err < 0)
+ break;
+ } else {
+ err = -EINVAL;
+ break;
+ }
+
+ err = rtsx_usb_switch_clock(ucr, clock,
+ ssc_depth, false, true, false);
+ if (err < 0) {
+ dev_dbg(ms_dev(host), "switch clock failed\n");
+ break;
+ }
+
+ host->ssc_depth = ssc_depth;
+ host->clock = clock;
+ host->ifmode = value;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+out:
+ mutex_unlock(&ucr->dev_mutex);
+
+ /* power-on delay */
+ if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON)
+ usleep_range(10000, 12000);
+
+ dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err);
+ return err;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int rtsx_usb_ms_suspend(struct device *dev)
+{
+ struct rtsx_usb_ms *host = dev_get_drvdata(dev);
+ struct memstick_host *msh = host->msh;
+
+ dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+ memstick_suspend_host(msh);
+ return 0;
+}
+
+static int rtsx_usb_ms_resume(struct device *dev)
+{
+ struct rtsx_usb_ms *host = dev_get_drvdata(dev);
+ struct memstick_host *msh = host->msh;
+
+ dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+ memstick_resume_host(msh);
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+/*
+ * Thread function of ms card slot detection. The thread starts right after
+ * successful host addition. It stops while the driver removal function sets
+ * host->eject true.
+ */
+static int rtsx_usb_detect_ms_card(void *__host)
+{
+ struct rtsx_usb_ms *host = (struct rtsx_usb_ms *)__host;
+ struct rtsx_ucr *ucr = host->ucr;
+ u8 val = 0;
+ int err;
+
+ for (;;) {
+ mutex_lock(&ucr->dev_mutex);
+
+ /* Check pending MS card changes */
+ err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val);
+ if (err) {
+ mutex_unlock(&ucr->dev_mutex);
+ goto poll_again;
+ }
+
+ /* Clear the pending */
+ rtsx_usb_write_register(ucr, CARD_INT_PEND,
+ XD_INT | MS_INT | SD_INT,
+ XD_INT | MS_INT | SD_INT);
+
+ mutex_unlock(&ucr->dev_mutex);
+
+ if (val & MS_INT) {
+ dev_dbg(ms_dev(host), "MS slot change detected\n");
+ memstick_detect_change(host->msh);
+ }
+
+poll_again:
+ if (host->eject)
+ break;
+
+ msleep(1000);
+ }
+
+ complete(&host->detect_ms_exit);
+ return 0;
+}
+
+static int rtsx_usb_ms_drv_probe(struct platform_device *pdev)
+{
+ struct memstick_host *msh;
+ struct rtsx_usb_ms *host;
+ struct rtsx_ucr *ucr;
+ int err;
+
+ ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
+ if (!ucr)
+ return -ENXIO;
+
+ dev_dbg(&(pdev->dev),
+ "Realtek USB Memstick controller found\n");
+
+ msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
+ if (!msh)
+ return -ENOMEM;
+
+ host = memstick_priv(msh);
+ host->ucr = ucr;
+ host->msh = msh;
+ host->pdev = pdev;
+ host->power_mode = MEMSTICK_POWER_OFF;
+ platform_set_drvdata(pdev, host);
+
+ mutex_init(&host->host_mutex);
+ INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req);
+
+ init_completion(&host->detect_ms_exit);
+ host->detect_ms = kthread_create(rtsx_usb_detect_ms_card, host,
+ "rtsx_usb_ms_%d", pdev->id);
+ if (IS_ERR(host->detect_ms)) {
+ dev_dbg(&(pdev->dev),
+ "Unable to create polling thread.\n");
+ err = PTR_ERR(host->detect_ms);
+ goto err_out;
+ }
+
+ msh->request = rtsx_usb_ms_request;
+ msh->set_param = rtsx_usb_ms_set_param;
+ msh->caps = MEMSTICK_CAP_PAR4;
+
+ pm_runtime_enable(&pdev->dev);
+ err = memstick_add_host(msh);
+ if (err)
+ goto err_out;
+
+ wake_up_process(host->detect_ms);
+ return 0;
+err_out:
+ memstick_free_host(msh);
+ return err;
+}
+
+static int rtsx_usb_ms_drv_remove(struct platform_device *pdev)
+{
+ struct rtsx_usb_ms *host = platform_get_drvdata(pdev);
+ struct memstick_host *msh;
+ int err;
+
+ msh = host->msh;
+ host->eject = true;
+ cancel_work_sync(&host->handle_req);
+
+ mutex_lock(&host->host_mutex);
+ if (host->req) {
+ dev_dbg(&(pdev->dev),
+ "%s: Controller removed during transfer\n",
+ dev_name(&msh->dev));
+ host->req->error = -ENOMEDIUM;
+ do {
+ err = memstick_next_req(msh, &host->req);
+ if (!err)
+ host->req->error = -ENOMEDIUM;
+ } while (!err);
+ }
+ mutex_unlock(&host->host_mutex);
+
+ wait_for_completion(&host->detect_ms_exit);
+ memstick_remove_host(msh);
+ memstick_free_host(msh);
+
+ /* Balance possible unbalanced usage count
+ * e.g. unconditional module removal
+ */
+ if (pm_runtime_active(ms_dev(host)))
+ pm_runtime_put(ms_dev(host));
+
+ pm_runtime_disable(&pdev->dev);
+ platform_set_drvdata(pdev, NULL);
+
+ dev_dbg(&(pdev->dev),
+ ": Realtek USB Memstick controller has been removed\n");
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(rtsx_usb_ms_pm_ops,
+ rtsx_usb_ms_suspend, rtsx_usb_ms_resume);
+
+static struct platform_device_id rtsx_usb_ms_ids[] = {
+ {
+ .name = "rtsx_usb_ms",
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids);
+
+static struct platform_driver rtsx_usb_ms_driver = {
+ .probe = rtsx_usb_ms_drv_probe,
+ .remove = rtsx_usb_ms_drv_remove,
+ .id_table = rtsx_usb_ms_ids,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "rtsx_usb_ms",
+ .pm = &rtsx_usb_ms_pm_ops,
+ },
+};
+module_platform_driver(rtsx_usb_ms_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
+MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
--
1.8.2


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