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    SubjectRe: [PATCH v4 3/3] memstick: Add realtek USB memstick host driver
    On 02/12/2014 06:00 PM, rogerable@realtek.com wrote:
    > 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>
    Andrew,

    Would you please Ack or comment this patch(3/3) to let the 3 patches be
    merged together? I have been making the same request at the message
    thread of "[PATCH v4 2/3]" since several weeks ago but got no response.
    Thus I re-post here and hope I could get something.

    Best regards,
    Roger Tseng
    > ---
    > drivers/memstick/host/Kconfig | 10 +
    > drivers/memstick/host/Makefile | 1 +
    > drivers/memstick/host/rtsx_usb_ms.c | 836 ++++++++++++++++++++++++++++++++++++
    > 3 files changed, 847 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..eb4c75d
    > --- /dev/null
    > +++ b/drivers/memstick/host/rtsx_usb_ms.c
    > @@ -0,0 +1,836 @@
    > +/* 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 <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
    > +
    > +#define ms_print_debug_regs(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;
    > +
    > + /* Wait ms power stable */
    > + 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);
    > +
    > + if (!data)
    > + return -EINVAL;
    > +
    > + 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);
    > +
    > + if (!data)
    > + return -EINVAL;
    > +
    > + 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__);
    > +
    > + 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 */
    > +
    > +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;
    > +
    > + if (!host)
    > + return 0;
    > +
    > + 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));
    > + 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");
    >


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      Last update: 2014-03-20 10:01    [W:7.223 / U:0.084 seconds]
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