840 lines
21 KiB
C
840 lines
21 KiB
C
/* Realtek USB Memstick Card Interface driver
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*
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* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Roger Tseng <rogerable@realtek.com>
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*/
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#include <linux/module.h>
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#include <linux/highmem.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/workqueue.h>
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#include <linux/memstick.h>
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#include <linux/kthread.h>
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#include <linux/mfd/rtsx_usb.h>
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#include <linux/pm_runtime.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <asm/unaligned.h>
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struct rtsx_usb_ms {
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struct platform_device *pdev;
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struct rtsx_ucr *ucr;
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struct memstick_host *msh;
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struct memstick_request *req;
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struct mutex host_mutex;
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struct work_struct handle_req;
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struct task_struct *detect_ms;
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struct completion detect_ms_exit;
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u8 ssc_depth;
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unsigned int clock;
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int power_mode;
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unsigned char ifmode;
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bool eject;
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};
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static inline struct device *ms_dev(struct rtsx_usb_ms *host)
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{
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return &(host->pdev->dev);
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}
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static inline void ms_clear_error(struct rtsx_usb_ms *host)
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{
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struct rtsx_ucr *ucr = host->ucr;
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rtsx_usb_ep0_write_register(ucr, CARD_STOP,
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MS_STOP | MS_CLR_ERR,
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MS_STOP | MS_CLR_ERR);
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rtsx_usb_clear_dma_err(ucr);
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rtsx_usb_clear_fsm_err(ucr);
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}
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#ifdef DEBUG
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static void ms_print_debug_regs(struct rtsx_usb_ms *host)
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{
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struct rtsx_ucr *ucr = host->ucr;
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u16 i;
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u8 *ptr;
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/* Print MS host internal registers */
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rtsx_usb_init_cmd(ucr);
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/* MS_CFG to MS_INT_REG */
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for (i = 0xFD40; i <= 0xFD44; i++)
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
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/* CARD_SHARE_MODE to CARD_GPIO */
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for (i = 0xFD51; i <= 0xFD56; i++)
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
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/* CARD_PULL_CTLx */
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for (i = 0xFD60; i <= 0xFD65; i++)
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
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/* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0);
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0);
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0);
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0);
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rtsx_usb_send_cmd(ucr, MODE_CR, 100);
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rtsx_usb_get_rsp(ucr, 21, 100);
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ptr = ucr->rsp_buf;
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for (i = 0xFD40; i <= 0xFD44; i++)
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
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for (i = 0xFD51; i <= 0xFD56; i++)
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
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for (i = 0xFD60; i <= 0xFD65; i++)
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++));
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++));
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++));
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dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++));
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}
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#else
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static void ms_print_debug_regs(struct rtsx_usb_ms *host)
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{
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}
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#endif
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static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
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{
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
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return rtsx_usb_send_cmd(ucr, MODE_C, 100);
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}
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static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
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{
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
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return rtsx_usb_send_cmd(ucr, MODE_C, 100);
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}
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static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
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{
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
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return rtsx_usb_send_cmd(ucr, MODE_C, 100);
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}
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static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
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{
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
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return rtsx_usb_send_cmd(ucr, MODE_C, 100);
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}
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static int ms_power_on(struct rtsx_usb_ms *host)
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{
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struct rtsx_ucr *ucr = host->ucr;
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int err;
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dev_dbg(ms_dev(host), "%s\n", __func__);
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
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CARD_SHARE_MASK, CARD_SHARE_MS);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
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MS_CLK_EN, MS_CLK_EN);
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err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
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if (err < 0)
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return err;
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if (CHECK_PKG(ucr, LQFP48))
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err = ms_pull_ctl_enable_lqfp48(ucr);
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else
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err = ms_pull_ctl_enable_qfn24(ucr);
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if (err < 0)
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return err;
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err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
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POWER_MASK, PARTIAL_POWER_ON);
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if (err)
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return err;
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usleep_range(800, 1000);
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
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POWER_MASK, POWER_ON);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
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MS_OUTPUT_EN, MS_OUTPUT_EN);
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return rtsx_usb_send_cmd(ucr, MODE_C, 100);
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}
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static int ms_power_off(struct rtsx_usb_ms *host)
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{
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struct rtsx_ucr *ucr = host->ucr;
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int err;
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dev_dbg(ms_dev(host), "%s\n", __func__);
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
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err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
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if (err < 0)
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return err;
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if (CHECK_PKG(ucr, LQFP48))
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return ms_pull_ctl_disable_lqfp48(ucr);
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return ms_pull_ctl_disable_qfn24(ucr);
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}
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static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir,
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u8 tpc, u8 cfg, struct scatterlist *sg)
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{
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struct rtsx_ucr *ucr = host->ucr;
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int err;
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unsigned int length = sg->length;
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u16 sec_cnt = (u16)(length / 512);
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u8 trans_mode, dma_dir, flag;
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unsigned int pipe;
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struct memstick_dev *card = host->msh->card;
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dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
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__func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
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length);
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if (data_dir == READ) {
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flag = MODE_CDIR;
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dma_dir = DMA_DIR_FROM_CARD;
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if (card->id.type != MEMSTICK_TYPE_PRO)
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trans_mode = MS_TM_NORMAL_READ;
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else
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trans_mode = MS_TM_AUTO_READ;
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pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
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} else {
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flag = MODE_CDOR;
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dma_dir = DMA_DIR_TO_CARD;
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if (card->id.type != MEMSTICK_TYPE_PRO)
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trans_mode = MS_TM_NORMAL_WRITE;
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else
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trans_mode = MS_TM_AUTO_WRITE;
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pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
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}
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
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if (card->id.type == MEMSTICK_TYPE_PRO) {
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
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0xFF, (u8)(sec_cnt >> 8));
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
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0xFF, (u8)sec_cnt);
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}
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
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0xFF, (u8)(length >> 24));
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
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0xFF, (u8)(length >> 16));
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
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0xFF, (u8)(length >> 8));
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF,
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(u8)length);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
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0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
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0x01, RING_BUFFER);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
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0xFF, MS_TRANSFER_START | trans_mode);
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rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
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MS_TRANSFER_END, MS_TRANSFER_END);
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err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100);
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if (err)
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return err;
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err = rtsx_usb_transfer_data(ucr, pipe, sg, length,
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1, NULL, 10000);
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if (err)
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goto err_out;
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err = rtsx_usb_get_rsp(ucr, 3, 15000);
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if (err)
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goto err_out;
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if (ucr->rsp_buf[0] & MS_TRANSFER_ERR ||
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ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) {
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err = -EIO;
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goto err_out;
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}
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return 0;
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err_out:
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ms_clear_error(host);
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return err;
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}
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static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc,
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u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
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{
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struct rtsx_ucr *ucr = host->ucr;
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int err, i;
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dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
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rtsx_usb_init_cmd(ucr);
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for (i = 0; i < cnt; i++)
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
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PPBUF_BASE2 + i, 0xFF, data[i]);
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if (cnt % 2)
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
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PPBUF_BASE2 + i, 0xFF, 0xFF);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
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0x01, PINGPONG_BUFFER);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
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0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
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rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
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MS_TRANSFER_END, MS_TRANSFER_END);
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rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
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err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
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if (err)
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return err;
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err = rtsx_usb_get_rsp(ucr, 2, 5000);
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if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
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u8 val;
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rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
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dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
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if (int_reg)
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*int_reg = val & 0x0F;
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ms_print_debug_regs(host);
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ms_clear_error(host);
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if (!(tpc & 0x08)) {
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if (val & MS_CRC16_ERR)
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return -EIO;
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} else {
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if (!(val & 0x80)) {
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if (val & (MS_INT_ERR | MS_INT_CMDNK))
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return -EIO;
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}
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}
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return -ETIMEDOUT;
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}
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if (int_reg)
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*int_reg = ucr->rsp_buf[1] & 0x0F;
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return 0;
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}
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static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc,
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u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
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{
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struct rtsx_ucr *ucr = host->ucr;
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int err, i;
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u8 *ptr;
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dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
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rtsx_usb_init_cmd(ucr);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
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rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
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0x01, PINGPONG_BUFFER);
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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");
|