// SPDX-License-Identifier: GPL-2.0-only
/* Driver for Realtek USB card reader
*
* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
*
* Author:
* Roger Tseng <[email protected]>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/rtsx_usb.h>
static int polling_pipe = 1;
module_param(polling_pipe, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(polling_pipe, "polling pipe (0: ctl, 1: bulk)");
static const struct mfd_cell rtsx_usb_cells[] = {
[RTSX_USB_SD_CARD] = {
.name = "rtsx_usb_sdmmc",
.pdata_size = 0,
},
[RTSX_USB_MS_CARD] = {
.name = "rtsx_usb_ms",
.pdata_size = 0,
},
};
static void rtsx_usb_sg_timed_out(struct timer_list *t)
{
struct rtsx_ucr *ucr = from_timer(ucr, t, sg_timer);
dev_dbg(&ucr->pusb_intf->dev, "%s: sg transfer timed out", __func__);
usb_sg_cancel(&ucr->current_sg);
}
static int rtsx_usb_bulk_transfer_sglist(struct rtsx_ucr *ucr,
unsigned int pipe, struct scatterlist *sg, int num_sg,
unsigned int length, unsigned int *act_len, int timeout)
{
int ret;
dev_dbg(&ucr->pusb_intf->dev, "%s: xfer %u bytes, %d entries\n",
__func__, length, num_sg);
ret = usb_sg_init(&ucr->current_sg, ucr->pusb_dev, pipe, 0,
sg, num_sg, length, GFP_NOIO);
if (ret)
return ret;
ucr->sg_timer.expires = jiffies + msecs_to_jiffies(timeout);
add_timer(&ucr->sg_timer);
usb_sg_wait(&ucr->current_sg);
if (!del_timer_sync(&ucr->sg_timer))
ret = -ETIMEDOUT;
else
ret = ucr->current_sg.status;
if (act_len)
*act_len = ucr->current_sg.bytes;
return ret;
}
int rtsx_usb_transfer_data(struct rtsx_ucr *ucr, unsigned int pipe,
void *buf, unsigned int len, int num_sg,
unsigned int *act_len, int timeout)
{
if (timeout < 600)
timeout = 600;
if (num_sg)
return rtsx_usb_bulk_transfer_sglist(ucr, pipe,
(struct scatterlist *)buf, num_sg, len, act_len,
timeout);
else
return usb_bulk_msg(ucr->pusb_dev, pipe, buf, len, act_len,
timeout);
}
EXPORT_SYMBOL_GPL(rtsx_usb_transfer_data);
static inline void rtsx_usb_seq_cmd_hdr(struct rtsx_ucr *ucr,
u16 addr, u16 len, u8 seq_type)
{
rtsx_usb_cmd_hdr_tag(ucr);
ucr->cmd_buf[PACKET_TYPE] = seq_type;
ucr->cmd_buf[5] = (u8)(len >> 8);
ucr->cmd_buf[6] = (u8)len;
ucr->cmd_buf[8] = (u8)(addr >> 8);
ucr->cmd_buf[9] = (u8)addr;
if (seq_type == SEQ_WRITE)
ucr->cmd_buf[STAGE_FLAG] = 0;
else
ucr->cmd_buf[STAGE_FLAG] = STAGE_R;
}
static int rtsx_usb_seq_write_register(struct rtsx_ucr *ucr,
u16 addr, u16 len, u8 *data)
{
u16 cmd_len = ALIGN(SEQ_WRITE_DATA_OFFSET + len, 4);
if (!data)
return -EINVAL;
if (cmd_len > IOBUF_SIZE)
return -EINVAL;
rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_WRITE);
memcpy(ucr->cmd_buf + SEQ_WRITE_DATA_OFFSET, data, len);
return rtsx_usb_transfer_data(ucr,
usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT),
ucr->cmd_buf, cmd_len, 0, NULL, 100);
}
static int rtsx_usb_seq_read_register(struct rtsx_ucr *ucr,
u16 addr, u16 len, u8 *data)
{
int i, ret;
u16 rsp_len = round_down(len, 4);
u16 res_len = len - rsp_len;
if (!data)
return -EINVAL;
/* 4-byte aligned part */
if (rsp_len) {
rtsx_usb_seq_cmd_hdr(ucr, addr, len, SEQ_READ);
ret = rtsx_usb_transfer_data(ucr,
usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT),
ucr->cmd_buf, 12, 0, NULL, 100);
if (ret)
return ret;
ret = rtsx_usb_transfer_data(ucr,
usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN),
data, rsp_len, 0, NULL, 100);
if (ret)
return ret;
}
/* unaligned part */
for (i = 0; i < res_len; i++) {
ret = rtsx_usb_read_register(ucr, addr + rsp_len + i,
data + rsp_len + i);
if (ret)
return ret;
}
return 0;
}
int rtsx_usb_read_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len)
{
return rtsx_usb_seq_read_register(ucr, PPBUF_BASE2, (u16)buf_len, buf);
}
EXPORT_SYMBOL_GPL(rtsx_usb_read_ppbuf);
int rtsx_usb_write_ppbuf(struct rtsx_ucr *ucr, u8 *buf, int buf_len)
{
return rtsx_usb_seq_write_register(ucr, PPBUF_BASE2, (u16)buf_len, buf);
}
EXPORT_SYMBOL_GPL(rtsx_usb_write_ppbuf);
int rtsx_usb_ep0_write_register(struct rtsx_ucr *ucr, u16 addr,
u8 mask, u8 data)
{
u16 value, index;
addr |= EP0_WRITE_REG_CMD << EP0_OP_SHIFT;
value = swab16(addr);
index = mask | data << 8;
return usb_control_msg(ucr->pusb_dev,
usb_sndctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, index, NULL, 0, 100);
}
EXPORT_SYMBOL_GPL(rtsx_usb_ep0_write_register);
int rtsx_usb_ep0_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data)
{
u16 value;
u8 *buf;
int ret;
if (!data)
return -EINVAL;
buf = kzalloc(sizeof(u8), GFP_KERNEL);
if (!buf)
return -ENOMEM;
addr |= EP0_READ_REG_CMD << EP0_OP_SHIFT;
value = swab16(addr);
ret = usb_control_msg(ucr->pusb_dev,
usb_rcvctrlpipe(ucr->pusb_dev, 0), RTSX_USB_REQ_REG_OP,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, 0, buf, 1, 100);
*data = *buf;
kfree(buf);
return ret;
}
EXPORT_SYMBOL_GPL(rtsx_usb_ep0_read_register);
void rtsx_usb_add_cmd(struct rtsx_ucr *ucr, u8 cmd_type, u16 reg_addr,
u8 mask, u8 data)
{
int i;
if (ucr->cmd_idx < (IOBUF_SIZE - CMD_OFFSET) / 4) {
i = CMD_OFFSET + ucr->cmd_idx * 4;
ucr->cmd_buf[i++] = ((cmd_type & 0x03) << 6) |
(u8)((reg_addr >> 8) & 0x3F);
ucr->cmd_buf[i++] = (u8)reg_addr;
ucr->cmd_buf[i++] = mask;
ucr->cmd_buf[i++] = data;
ucr->cmd_idx++;
}
}
EXPORT_SYMBOL_GPL(rtsx_usb_add_cmd);
int rtsx_usb_send_cmd(struct rtsx_ucr *ucr, u8 flag, int timeout)
{
int ret;
ucr->cmd_buf[CNT_H] = (u8)(ucr->cmd_idx >> 8);
ucr->cmd_buf[CNT_L] = (u8)(ucr->cmd_idx);
ucr->cmd_buf[STAGE_FLAG] = flag;
ret = rtsx_usb_transfer_data(ucr,
usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT),
ucr->cmd_buf, ucr->cmd_idx * 4 + CMD_OFFSET,
0, NULL, timeout);
if (ret) {
rtsx_usb_clear_fsm_err(ucr);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(rtsx_usb_send_cmd);
int rtsx_usb_get_rsp(struct rtsx_ucr *ucr, int rsp_len, int timeout)
{
if (rsp_len <= 0)
return -EINVAL;
rsp_len = ALIGN(rsp_len, 4);
return rtsx_usb_transfer_data(ucr,
usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN),
ucr->rsp_buf, rsp_len, 0, NULL, timeout);
}
EXPORT_SYMBOL_GPL(rtsx_usb_get_rsp);
static int rtsx_usb_get_status_with_bulk(struct rtsx_ucr *ucr, u16 *status)
{
int ret;
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_EXIST, 0x00, 0x00);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, OCPSTAT, 0x00, 0x00);
ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
if (ret)
return ret;
ret = rtsx_usb_get_rsp(ucr, 2, 100);
if (ret)
return ret;
*status = ((ucr->rsp_buf[0] >> 2) & 0x0f) |
((ucr->rsp_buf[1] & 0x03) << 4);
return 0;
}
int rtsx_usb_get_card_status(struct rtsx_ucr *ucr, u16 *status)
{
int ret;
u16 *buf;
if (!status)
return -EINVAL;
if (polling_pipe == 0) {
buf = kzalloc(sizeof(u16), GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = usb_control_msg(ucr->pusb_dev,
usb_rcvctrlpipe(ucr->pusb_dev, 0),
RTSX_USB_REQ_POLL,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, 2, 100);
*status = *buf;
kfree(buf);
} else {
ret = rtsx_usb_get_status_with_bulk(ucr, status);
}
/* usb_control_msg may return positive when success */
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(rtsx_usb_get_card_status);
static int rtsx_usb_write_phy_register(struct rtsx_ucr *ucr, u8 addr, u8 val)
{
dev_dbg(&ucr->pusb_intf->dev, "Write 0x%x to phy register 0x%x\n",
val, addr);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VSTAIN, 0xFF, val);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL, 0xFF, addr & 0x0F);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VCONTROL,
0xFF, (addr >> 4) & 0x0F);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x00);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, HS_VLOADM, 0xFF, 0x01);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
int rtsx_usb_write_register(struct rtsx_ucr *ucr, u16 addr, u8 mask, u8 data)
{
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, addr, mask, data);
return rtsx_usb_send_cmd(ucr, MODE_C, 100);
}
EXPORT_SYMBOL_GPL(rtsx_usb_write_register);
int rtsx_usb_read_register(struct rtsx_ucr *ucr, u16 addr, u8 *data)
{
int ret;
if (data != NULL)
*data = 0;
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, READ_REG_CMD, addr, 0, 0);
ret = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
if (ret)
return ret;
ret = rtsx_usb_get_rsp(ucr, 1, 100);
if (ret)
return ret;
if (data != NULL)
*data = ucr->rsp_buf[0];
return 0;
}
EXPORT_SYMBOL_GPL(rtsx_usb_read_register);
static inline u8 double_ssc_depth(u8 depth)
{
return (depth > 1) ? (depth - 1) : depth;
}
static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
{
if (div > CLK_DIV_1) {
if (ssc_depth > div - 1)
ssc_depth -= (div - 1);
else
ssc_depth = SSC_DEPTH_2M;
}
return ssc_depth;
}
int rtsx_usb_switch_clock(struct rtsx_ucr *ucr, unsigned int card_clock,
u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
{
int ret;
u8 n, clk_divider, mcu_cnt, div;
if (!card_clock) {
ucr->cur_clk = 0;
return 0;
}
if (initial_mode) {
/* We use 250k(around) here, in initial stage */
clk_divider = SD_CLK_DIVIDE_128;
card_clock = 30000000;
} else {
clk_divider = SD_CLK_DIVIDE_0;
}
ret = rtsx_usb_write_register(ucr, SD_CFG1,
SD_CLK_DIVIDE_MASK, clk_divider);
if (ret < 0)
return ret;
card_clock /= 1000000;
dev_dbg(&ucr->pusb_intf->dev,
"Switch card clock to %dMHz\n", card_clock);
if (!initial_mode && double_clk)
card_clock *= 2;
dev_dbg(&ucr->pusb_intf->dev,
"Internal SSC clock: %dMHz (cur_clk = %d)\n",
card_clock, ucr->cur_clk);
if (card_clock == ucr->cur_clk)
return 0;
/* Converting clock value into internal settings: n and div */
n = card_clock - 2;
if ((card_clock <= 2) || (n > MAX_DIV_N))
return -EINVAL;
mcu_cnt = 60/card_clock + 3;
if (mcu_cnt > 15)
mcu_cnt = 15;
/* Make sure that the SSC clock div_n is not less than MIN_DIV_N */
div = CLK_DIV_1;
while (n < MIN_DIV_N && div < CLK_DIV_4) {
n = (n + 2) * 2 - 2;
div++;
}
dev_dbg(&ucr->pusb_intf->dev, "n = %d, div = %d\n", n, div);
if (double_clk)
ssc_depth = double_ssc_depth(ssc_depth);
ssc_depth = revise_ssc_depth(ssc_depth, div);
dev_dbg(&ucr->pusb_intf->dev, "ssc_depth = %d\n", ssc_depth);
rtsx_usb_init_cmd(ucr);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV,
0x3F, (div << 4) | mcu_cnt);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL2,
SSC_DEPTH_MASK, ssc_depth);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
if (vpclk) {
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
PHASE_NOT_RESET, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
PHASE_NOT_RESET, PHASE_NOT_RESET);
}
ret = rtsx_usb_send_cmd(ucr, MODE_C, 2000);
if (ret < 0)
return ret;
ret = rtsx_usb_write_register(ucr, SSC_CTL1, 0xff,
SSC_RSTB | SSC_8X_EN | SSC_SEL_4M);
if (ret < 0)
return ret;
/* Wait SSC clock stable */
usleep_range(100, 1000);
ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0);
if (ret < 0)
return ret;
ucr->cur_clk = card_clock;
return 0;
}
EXPORT_SYMBOL_GPL(rtsx_usb_switch_clock);
int rtsx_usb_card_exclusive_check(struct rtsx_ucr *ucr, int card)
{
int ret;
u16 val;
u16 cd_mask[] = {
[RTSX_USB_SD_CARD] = (CD_MASK & ~SD_CD),
[RTSX_USB_MS_CARD] = (CD_MASK & ~MS_CD)
};
ret = rtsx_usb_get_card_status(ucr, &val);
/*
* If get status fails, return 0 (ok) for the exclusive check
* and let the flow fail at somewhere else.
*/
if (ret)
return 0;
if (val & cd_mask[card])
return -EIO;
return 0;
}
EXPORT_SYMBOL_GPL(rtsx_usb_card_exclusive_check);
static int rtsx_usb_reset_chip(struct rtsx_ucr *ucr)
{
int ret;
u8 val;
rtsx_usb_init_cmd(ucr);
if (CHECK_PKG(ucr, LQFP48)) {
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
LDO3318_PWR_MASK, LDO_SUSPEND);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
FORCE_LDO_POWERB, FORCE_LDO_POWERB);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1,
0x30, 0x10);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5,
0x03, 0x01);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6,
0x0C, 0x04);
}
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SYS_DUMMY0, NYET_MSAK, NYET_EN);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CD_DEGLITCH_WIDTH, 0xFF, 0x08);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
CD_DEGLITCH_EN, XD_CD_DEGLITCH_EN, 0x0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD30_DRIVE_SEL,
SD30_DRIVE_MASK, DRIVER_TYPE_D);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
CARD_DRIVE_SEL, SD20_DRIVE_MASK, 0x0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG, 0xE0, 0x0);
if (ucr->is_rts5179)
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
CARD_PULL_CTL5, 0x03, 0x01);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DMA1_CTL,
EXTEND_DMA1_ASYNC_SIGNAL, EXTEND_DMA1_ASYNC_SIGNAL);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_INT_PEND,
XD_INT | MS_INT | SD_INT,
XD_INT | MS_INT | SD_INT);
ret = rtsx_usb_send_cmd(ucr, MODE_C, 100);
if (ret)
return ret;
/* config non-crystal mode */
rtsx_usb_read_register(ucr, CFG_MODE, &val);
if ((val & XTAL_FREE) || ((val & CLK_MODE_MASK) == CLK_MODE_NON_XTAL)) {
ret = rtsx_usb_write_phy_register(ucr, 0xC2, 0x7C);
if (ret)
return ret;
}
return 0;
}
static int rtsx_usb_init_chip(struct rtsx_ucr *ucr)
{
int ret;
u8 val;
rtsx_usb_clear_fsm_err(ucr);
/* power on SSC */
ret = rtsx_usb_write_register(ucr,
FPDCTL, SSC_POWER_MASK, SSC_POWER_ON);
if (ret)
return ret;
usleep_range(100, 1000);
ret = rtsx_usb_write_register(ucr, CLK_DIV, CLK_CHANGE, 0x00);
if (ret)
return ret;
/* determine IC version */
ret = rtsx_usb_read_register(ucr, HW_VERSION, &val);
if (ret)
return ret;
ucr->ic_version = val & HW_VER_MASK;
/* determine package */
ret = rtsx_usb_read_register(ucr, CARD_SHARE_MODE, &val);
if (ret)
return ret;
if (val & CARD_SHARE_LQFP_SEL) {
ucr->package = LQFP48;
dev_dbg(&ucr->pusb_intf->dev, "Package: LQFP48\n");
} else {
ucr->package = QFN24;
dev_dbg(&ucr->pusb_intf->dev, "Package: QFN24\n");
}
/* determine IC variations */
rtsx_usb_read_register(ucr, CFG_MODE_1, &val);
if (val & RTS5179) {
ucr->is_rts5179 = true;
dev_dbg(&ucr->pusb_intf->dev, "Device is rts5179\n");
} else {
ucr->is_rts5179 = false;
}
return rtsx_usb_reset_chip(ucr);
}
static int rtsx_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct rtsx_ucr *ucr;
int ret;
dev_dbg(&intf->dev,
": Realtek USB Card Reader found at bus %03d address %03d\n",
usb_dev->bus->busnum, usb_dev->devnum);
ucr = devm_kzalloc(&intf->dev, sizeof(*ucr), GFP_KERNEL);
if (!ucr)
return -ENOMEM;
ucr->pusb_dev = usb_dev;
ucr->cmd_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL);
if (!ucr->cmd_buf)
return -ENOMEM;
ucr->rsp_buf = kmalloc(IOBUF_SIZE, GFP_KERNEL);
if (!ucr->rsp_buf) {
ret = -ENOMEM;
goto out_free_cmd_buf;
}
usb_set_intfdata(intf, ucr);
ucr->vendor_id = id->idVendor;
ucr->product_id = id->idProduct;
mutex_init(&ucr->dev_mutex);
ucr->pusb_intf = intf;
/* initialize */
ret = rtsx_usb_init_chip(ucr);
if (ret)
goto out_init_fail;
/* initialize USB SG transfer timer */
timer_setup(&ucr->sg_timer, rtsx_usb_sg_timed_out, 0);
ret = mfd_add_hotplug_devices(&intf->dev, rtsx_usb_cells,
ARRAY_SIZE(rtsx_usb_cells));
if (ret)
goto out_init_fail;
#ifdef CONFIG_PM
intf->needs_remote_wakeup = 1;
usb_enable_autosuspend(usb_dev);
#endif
return 0;
out_init_fail:
usb_set_intfdata(ucr->pusb_intf, NULL);
kfree(ucr->rsp_buf);
ucr->rsp_buf = NULL;
out_free_cmd_buf:
kfree(ucr->cmd_buf);
ucr->cmd_buf = NULL;
return ret;
}
static void rtsx_usb_disconnect(struct usb_interface *intf)
{
struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf);
dev_dbg(&intf->dev, "%s called\n", __func__);
mfd_remove_devices(&intf->dev);
usb_set_intfdata(ucr->pusb_intf, NULL);
kfree(ucr->cmd_buf);
ucr->cmd_buf = NULL;
kfree(ucr->rsp_buf);
ucr->rsp_buf = NULL;
}
#ifdef CONFIG_PM
static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message)
{
struct rtsx_ucr *ucr =
(struct rtsx_ucr *)usb_get_intfdata(intf);
u16 val = 0;
dev_dbg(&intf->dev, "%s called with pm message 0x%04x\n",
__func__, message.event);
if (PMSG_IS_AUTO(message)) {
if (mutex_trylock(&ucr->dev_mutex)) {
rtsx_usb_get_card_status(ucr, &val);
mutex_unlock(&ucr->dev_mutex);
/* Defer the autosuspend if card exists */
if (val & (SD_CD | MS_CD))
return -EAGAIN;
} else {
/* There is an ongoing operation*/
return -EAGAIN;
}
}
return 0;
}
static int rtsx_usb_resume_child(struct device *dev, void *data)
{
pm_request_resume(dev);
return 0;
}
static int rtsx_usb_resume(struct usb_interface *intf)
{
device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child);
return 0;
}
static int rtsx_usb_reset_resume(struct usb_interface *intf)
{
struct rtsx_ucr *ucr =
(struct rtsx_ucr *)usb_get_intfdata(intf);
rtsx_usb_reset_chip(ucr);
device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child);
return 0;
}
#else /* CONFIG_PM */
#define rtsx_usb_suspend NULL
#define rtsx_usb_resume NULL
#define rtsx_usb_reset_resume NULL
#endif /* CONFIG_PM */
static int rtsx_usb_pre_reset(struct usb_interface *intf)
{
struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf);
mutex_lock(&ucr->dev_mutex);
return 0;
}
static int rtsx_usb_post_reset(struct usb_interface *intf)
{
struct rtsx_ucr *ucr = (struct rtsx_ucr *)usb_get_intfdata(intf);
mutex_unlock(&ucr->dev_mutex);
return 0;
}
static const struct usb_device_id rtsx_usb_usb_ids[] = {
{ USB_DEVICE(0x0BDA, 0x0129) },
{ USB_DEVICE(0x0BDA, 0x0139) },
{ USB_DEVICE(0x0BDA, 0x0140) },
{ }
};
MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids);
static struct usb_driver rtsx_usb_driver = {
.name = "rtsx_usb",
.probe = rtsx_usb_probe,
.disconnect = rtsx_usb_disconnect,
.suspend = rtsx_usb_suspend,
.resume = rtsx_usb_resume,
.reset_resume = rtsx_usb_reset_resume,
.pre_reset = rtsx_usb_pre_reset,
.post_reset = rtsx_usb_post_reset,
.id_table = rtsx_usb_usb_ids,
.supports_autosuspend = 1,
.soft_unbind = 1,
};
module_usb_driver(rtsx_usb_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Roger Tseng <[email protected]>");
MODULE_DESCRIPTION("Realtek USB Card Reader Driver");
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