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Date:	Thu, 20 Mar 2014 16:38:03 +0800
From:	Roger <rogerable@...ltek.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>, Chris Ball <cjb@...top.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Alex Dubov <oakad@...oo.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
	<driverdev-devel@...uxdriverproject.org>,
	<wei_wang@...lsil.com.cn>, <micky_ching@...lsil.com.cn>
Subject: Re: [PATCH v4 3/3] memstick: Add realtek USB memstick host driver

On 02/12/2014 06:00 PM, rogerable@...ltek.com wrote:
> From: Roger Tseng <rogerable@...ltek.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@...ltek.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@...ltek.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@...ltek.com>");
> +MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
>
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