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exar.c
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exar.c
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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Copyright (c) 2015 Exar Corporation, Inc.
*
* This driver will work with any USB UART function in these Exar devices:
* XR21V1410/1412/1414
* XR21B1411
* XR21B1420/1422/1424
* XR22801/802/804
*
* The driver has been tested on various kernel versions from 3.6.x to 3.17.x.
* This driver may work on newer versions as well. There is a different driver
* available from www.exar.com that will work with kernel versions 2.6.18 to
* 3.4.x.
*
* ChangeLog:
* Version 1B - Initial released version.
*/
//#undef DEBUG
#undef VERBOSE_DEBUG
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <linux/list.h>
#include "linux/version.h"
#include "exar.h"
#define DRIVER_AUTHOR "<[email protected]>"
#define DRIVER_DESC "Exar USB UART (serial port) driver"
static struct usb_driver xr_usb_serial_driver;
static struct tty_driver *xr_usb_serial_tty_driver;
static struct xr_usb_serial *xr_usb_serial_table[XR_USB_SERIAL_TTY_MINORS];
static DEFINE_MUTEX(xr_usb_serial_table_lock);
/*
* xr_usb_serial_table accessors
*/
/*
* Look up an XR_USB_SERIAL structure by index. If found and not disconnected,
* increment its refcount and return it with its mutex held.
*/
static struct xr_usb_serial *xr_usb_serial_get_by_index(unsigned int index)
{
struct xr_usb_serial *xr;
mutex_lock(&xr_usb_serial_table_lock);
xr = xr_usb_serial_table[index];
if (xr) {
mutex_lock(&xr->mutex);
if (xr->disconnected) {
mutex_unlock(&xr->mutex);
xr = NULL;
} else {
tty_port_get(&xr->port);
mutex_unlock(&xr->mutex);
}
}
mutex_unlock(&xr_usb_serial_table_lock);
return xr;
}
/*
* Try to find an available minor number and if found, associate it with
* 'xr_usb_serial'.
*/
static int xr_usb_serial_alloc_minor(struct xr_usb_serial *xr)
{
int minor;
mutex_lock(&xr_usb_serial_table_lock);
for (minor = 0; minor < XR_USB_SERIAL_TTY_MINORS; minor++) {
if (!xr_usb_serial_table[minor]) {
xr_usb_serial_table[minor] = xr;
break;
}
}
mutex_unlock(&xr_usb_serial_table_lock);
return minor;
}
/* Release the minor number associated with 'xr_usb_serial'. */
static void xr_usb_serial_release_minor(struct xr_usb_serial *xr)
{
mutex_lock(&xr_usb_serial_table_lock);
xr_usb_serial_table[xr->minor] = NULL;
mutex_unlock(&xr_usb_serial_table_lock);
}
/*
* Functions for XR_USB_SERIAL control messages.
*/
static int xr_usb_serial_ctrl_msg(struct xr_usb_serial *xr,
int request, int value,
void *buf, int len)
{
int if_num = xr->control->altsetting[0].desc.bInterfaceNumber;
int retval = usb_control_msg(xr->dev, usb_sndctrlpipe(xr->dev, 0),
request, USB_RT_XR_USB_SERIAL, value,
if_num, buf, len, 5000);
dev_dbg(&xr->control->dev,
"%s - rq 0x%02x, val %#x, len %#x, result %d\n",
__func__, request, value, len, retval);
return retval < 0 ? retval : 0;
}
#define XR_SET_MAP_XR2280X 5
#define XR_GET_MAP_XR2280X 5
#define XR_SET_MAP_XR21B142X 0
#define XR_GET_MAP_XR21B142X 0
#define XR_SET_MAP_XR21V141X 0
#define XR_GET_MAP_XR21V141X 1
#define XR_SET_MAP_XR21B1411 0
#define XR_GET_MAP_XR21B1411 1
static int set_reg(struct xr_usb_serial *xr, int regnum, int value)
{
int result;
int channel = 0;
dev_dbg(&xr->control->dev, "%s Channel:%d 0x%02x = 0x%02x\n",
__func__, channel, regnum, value);
if ((xr->DeviceProduct & 0xfff0) == 0x1400) {
int XR2280xaddr = XR2280x_FUNC_MGR_OFFSET + regnum;
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR2280X,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
XR2280xaddr,
NULL,
0,
5000);
} else if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
if (xr->channel)
channel = xr->channel - 1;
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21V141X,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
regnum | (channel << 8),
NULL,
0,
5000);
} else if (xr->DeviceProduct == 0x1411) {
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21B1411,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
regnum,
NULL,
0,
5000);
} else if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424)) {
channel = (xr->channel - 4) * 2;
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21B142X,
USB_DIR_OUT | USB_TYPE_VENDOR | 1,
value,
regnum | (channel << 8),
NULL,
0,
5000);
} else {
result = -1;
}
if (result < 0)
dev_dbg(&xr->control->dev, "%s Error:%d\n", __func__, result);
return result;
}
static int set_reg_ext(struct xr_usb_serial *xr, int channel, int regnum,
int value)
{
int result;
int XR2280xaddr = XR2280x_FUNC_MGR_OFFSET + regnum;
dev_dbg(&xr->control->dev, "%s channel:%d 0x%02x = 0x%02x\n",
__func__, channel, regnum, value);
if ((xr->DeviceProduct & 0xfff0) == 0x1400) {
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR2280X,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
XR2280xaddr,
NULL,
0,
5000);
} else if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21V141X,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
regnum | (channel << 8),
NULL,
0,
5000);
} else if (xr->DeviceProduct == 0x1411) {
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21B1411,
USB_DIR_OUT | USB_TYPE_VENDOR,
value,
regnum,
NULL,
0,
5000);
} else if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424)) {
result = usb_control_msg(xr->dev,
usb_sndctrlpipe(xr->dev, 0),
XR_SET_MAP_XR21B142X,
USB_DIR_OUT | USB_TYPE_VENDOR | 1,
value,
regnum | (channel << 8),
NULL,
0,
5000);
} else {
result = -1;
}
if (result < 0)
dev_dbg(&xr->control->dev, "%s Error:%d\n", __func__, result);
return result;
}
static int get_reg(struct xr_usb_serial *xr, int regnum, short *value)
{
int result;
int channel = 0;
if ((xr->DeviceProduct & 0xfff0) == 0x1400) {
int XR2280xaddr = XR2280x_FUNC_MGR_OFFSET + regnum;
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR2280X,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
XR2280xaddr,
value,
2,
5000);
} else if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
if (xr->channel)
channel = xr->channel - 1;
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21V141X,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
regnum | (channel << 8),
value,
1,
5000);
} else if (xr->DeviceProduct == 0x1411) {
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21B1411,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
regnum,
value,
2,
5000);
} else if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424)) {
channel = (xr->channel - 4) * 2;
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21B142X,
USB_DIR_IN | USB_TYPE_VENDOR | 1,
0,
regnum | (channel << 8),
value,
2,
5000);
} else {
result = -1;
}
if (result < 0)
dev_dbg(&xr->control->dev, "%s channel:%d Reg 0x%x Error:%d\n",
__func__, channel, regnum, result);
else
dev_dbg(&xr->control->dev, "%s channel:%d 0x%x = 0x%04x\n",
__func__, channel, regnum, *value);
return result;
}
static int get_reg_ext(struct xr_usb_serial *xr, int channel, int regnum,
short *value)
{
int result;
int XR2280xaddr = XR2280x_FUNC_MGR_OFFSET + regnum;
if ((xr->DeviceProduct & 0xfff0) == 0x1400) {
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR2280X,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
XR2280xaddr,
value,
2,
5000);
} else if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
unsigned char reg_value = 0;
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21V141X,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
regnum | (channel << 8),
®_value,
1,
5000);
dev_dbg(&xr->control->dev, "get_reg_ext reg:%x\n", reg_value);
*value = reg_value;
} else if (xr->DeviceProduct == 0x1411) {
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21B1411,
USB_DIR_IN | USB_TYPE_VENDOR,
0,
regnum | (channel << 8),
value,
2,
5000);
} else if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424)) {
result = usb_control_msg(xr->dev,
usb_rcvctrlpipe(xr->dev, 0),
XR_GET_MAP_XR21B142X,
USB_DIR_IN | USB_TYPE_VENDOR | 1,
0,
regnum | (channel << 8),
value,
2,
5000);
} else {
result = -1;
}
if (result < 0)
dev_dbg(&xr->control->dev, "%s Error:%d\n", __func__, result);
else
dev_dbg(&xr->control->dev, "%s channel:%d 0x%x = 0x%04x\n",
__func__, channel, regnum, *value);
return result;
}
struct xr21v141x_baud_rate {
unsigned int tx;
unsigned int rx0;
unsigned int rx1;
};
static struct xr21v141x_baud_rate xr21v141x_baud_rates[] = {
{ 0x000, 0x000, 0x000 },
{ 0x000, 0x000, 0x000 },
{ 0x100, 0x000, 0x100 },
{ 0x020, 0x400, 0x020 },
{ 0x010, 0x100, 0x010 },
{ 0x208, 0x040, 0x208 },
{ 0x104, 0x820, 0x108 },
{ 0x844, 0x210, 0x884 },
{ 0x444, 0x110, 0x444 },
{ 0x122, 0x888, 0x224 },
{ 0x912, 0x448, 0x924 },
{ 0x492, 0x248, 0x492 },
{ 0x252, 0x928, 0x292 },
{ 0X94A, 0X4A4, 0XA52 },
{ 0X52A, 0XAA4, 0X54A },
{ 0XAAA, 0x954, 0X4AA },
{ 0XAAA, 0x554, 0XAAA },
{ 0x555, 0XAD4, 0X5AA },
{ 0XB55, 0XAB4, 0X55A },
{ 0X6B5, 0X5AC, 0XB56 },
{ 0X5B5, 0XD6C, 0X6D6 },
{ 0XB6D, 0XB6A, 0XDB6 },
{ 0X76D, 0X6DA, 0XBB6 },
{ 0XEDD, 0XDDA, 0X76E },
{ 0XDDD, 0XBBA, 0XEEE },
{ 0X7BB, 0XF7A, 0XDDE },
{ 0XF7B, 0XEF6, 0X7DE },
{ 0XDF7, 0XBF6, 0XF7E },
{ 0X7F7, 0XFEE, 0XEFE },
{ 0XFDF, 0XFBE, 0X7FE },
{ 0XF7F, 0XEFE, 0XFFE },
{ 0XFFF, 0XFFE, 0XFFD },
};
#define UART_CLOCK_DIVISOR_0 0x004
#define UART_CLOCK_DIVISOR_1 0x005
#define UART_CLOCK_DIVISOR_2 0x006
#define UART_TX_CLOCK_MASK_0 0x007
#define UART_TX_CLOCK_MASK_1 0x008
#define UART_RX_CLOCK_MASK_0 0x009
#define UART_RX_CLOCK_MASK_1 0x00a
static int xr21v141x_set_baud_rate(struct xr_usb_serial *xr, unsigned int rate)
{
unsigned int divisor = 48000000 / rate;
unsigned int i = ((32 * 48000000) / rate) & 0x1f;
unsigned int tx_mask = xr21v141x_baud_rates[i].tx;
unsigned int rx_mask = (divisor & 1) ? xr21v141x_baud_rates[i].rx1 :
xr21v141x_baud_rates[i].rx0;
dev_dbg(&xr->control->dev, "Setting baud rate to %d: i=%u div=%u tx=%03x rx=%03x\n",
rate, i, divisor, tx_mask, rx_mask);
set_reg(xr, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
set_reg(xr, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
set_reg(xr, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
set_reg(xr, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
set_reg(xr, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
set_reg(xr, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
set_reg(xr, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
return 0;
}
/* devices aren't required to support these requests.
* the cdc xr_usb_serial descriptor tells whether they do...
*/
static int set_control(struct xr_usb_serial *xr, unsigned int control)
{
int ret = 0;
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
if (control & XR_USB_SERIAL_CTRL_DTR)
set_reg(xr, xr->reg_map.uart_gpio_clr_addr, 0x08);
else
set_reg(xr, xr->reg_map.uart_gpio_set_addr, 0x08);
if (control & XR_USB_SERIAL_CTRL_RTS)
set_reg(xr, xr->reg_map.uart_gpio_clr_addr, 0x20);
else
set_reg(xr, xr->reg_map.uart_gpio_set_addr, 0x20);
} else {
ret = xr_usb_serial_ctrl_msg(xr,
USB_CDC_REQ_SET_CONTROL_LINE_STATE,
control, NULL, 0);
}
return ret;
}
static int set_line(struct xr_usb_serial *xr, struct usb_cdc_line_coding *line)
{
int ret = 0;
unsigned int format_size;
unsigned int format_parity;
unsigned int format_stop;
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
xr21v141x_set_baud_rate(xr, line->dwDTERate);
format_size = line->bDataBits;
format_parity = line->bParityType;
format_stop = line->bCharFormat;
set_reg(xr, xr->reg_map.uart_format_addr,
(format_size << 0) |
(format_parity << 4) |
(format_stop << 7));
} else {
ret = xr_usb_serial_ctrl_msg(xr, USB_CDC_REQ_SET_LINE_CODING, 0,
line, sizeof *(line));
}
return ret;
}
static int set_flow_mode(struct xr_usb_serial *xr, struct tty_struct *tty,
unsigned int cflag)
{
unsigned int flow;
unsigned int gpio_mode;
if (cflag & CRTSCTS) {
dev_dbg(&xr->control->dev, "xr_usb_serial_set_flow_mode:hardware\n");
flow = UART_FLOW_MODE_HW;
gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
} else if (I_IXOFF(tty) || I_IXON(tty)) {
unsigned char start_char = START_CHAR(tty);
unsigned char stop_char = STOP_CHAR(tty);
dev_dbg(&xr->control->dev, "xr_usb_serial_set_flow_mode:software\n");
flow = UART_FLOW_MODE_SW;
gpio_mode = UART_GPIO_MODE_SEL_GPIO;
set_reg(xr, xr->reg_map.uart_xon_char_addr, start_char);
set_reg(xr, xr->reg_map.uart_xoff_char_addr, stop_char);
} else {
dev_dbg(&xr->control->dev, "xr_usb_serial_set_flow_mode:none\n");
flow = UART_FLOW_MODE_NONE;
gpio_mode = UART_GPIO_MODE_SEL_GPIO;
}
// Add support for the TXT and RXT function for 0x1420, 0x1422, 0x1424,
// by setting GPIO_MODE [9:8] = '11'
if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424))
gpio_mode |= 0x300;
set_reg(xr, xr->reg_map.uart_flow_addr, flow);
set_reg(xr, xr->reg_map.uart_gpio_mode_addr, gpio_mode);
return 0;
}
static int send_break(struct xr_usb_serial *xr, int state)
{
int ret = 0;
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
if (state)
ret = set_reg(xr, xr->reg_map.tx_break_addr, 0xffff);
else
ret = set_reg(xr, xr->reg_map.tx_break_addr, 0);
} else {
ret = xr_usb_serial_ctrl_msg(xr, USB_CDC_REQ_SEND_BREAK, state,
NULL, 0);
}
return ret;
}
#define URM_REG_BLOCK 4
#define URM_ENABLE_BASE 0x010
#define URM_ENABLE_0_TX 0x001
#define URM_ENABLE_0_RX 0x002
#define URM_RESET_RX_FIFO_BASE 0x018
#define URM_RESET_TX_FIFO_BASE 0x01C
static int device_enable(struct xr_usb_serial *xr)
{
int ret = 0;
int channel = xr->channel;
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
ret = set_reg_ext(xr, URM_REG_BLOCK, URM_ENABLE_BASE + channel,
URM_ENABLE_0_TX);
ret = set_reg(xr, xr->reg_map.uart_enable_addr,
UART_ENABLE_TX | UART_ENABLE_RX);
ret = set_reg_ext(xr, URM_REG_BLOCK, URM_ENABLE_BASE + channel,
URM_ENABLE_0_TX | URM_ENABLE_0_RX);
} else {
ret = set_reg(xr, xr->reg_map.uart_enable_addr,
UART_ENABLE_TX | UART_ENABLE_RX);
}
return ret;
}
static int fifo_reset(struct xr_usb_serial *xr)
{
int ret = 0;
int channel = xr->channel;
if (channel)
channel--;
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
ret = set_reg_ext(xr, URM_REG_BLOCK,
URM_RESET_RX_FIFO_BASE + channel, 0xff);
ret |= set_reg_ext(xr, URM_REG_BLOCK,
URM_RESET_TX_FIFO_BASE + channel, 0xff);
}
return ret;
}
static int device_disable(struct xr_usb_serial *xr)
{
int ret = 0;
int channel = xr->channel;
ret = set_reg(xr, xr->reg_map.uart_enable_addr, 0);
if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
ret = set_reg_ext(xr, URM_REG_BLOCK, URM_ENABLE_BASE + channel,
URM_ENABLE_0_TX);
}
return ret;
}
static int set_loopback(struct xr_usb_serial *xr, int channel)
{
int ret = 0;
device_disable(xr);
ret = set_reg_ext(xr, channel,
xr->reg_map.uart_loopback_addr, 0x07);
device_enable(xr);
return ret;
}
static int tiocmget(struct xr_usb_serial *xr)
{
short data;
int result;
result = get_reg(xr, xr->reg_map.uart_gpio_status_addr, &data);
dev_dbg(&xr->control->dev, "xr_usb_serial_tiocmget uart_gpio_status_addr:0x%04x\n",
data);
if (result)
return ((data & 0x8) ? 0 : TIOCM_DTR) |
((data & 0x20) ? 0 : TIOCM_RTS) |
((data & 0x4) ? 0 : TIOCM_DSR) |
((data & 0x1) ? 0 : TIOCM_RI) |
((data & 0x2) ? 0 : TIOCM_CD) |
((data & 0x10) ? 0 : TIOCM_CTS);
else
return -EFAULT;
}
static int tiocmset(struct xr_usb_serial *xr, unsigned int set,
unsigned int clear)
{
unsigned int newctrl = 0;
newctrl = xr->ctrlout;
set = (set & TIOCM_DTR ? XR_USB_SERIAL_CTRL_DTR : 0) |
(set & TIOCM_RTS ? XR_USB_SERIAL_CTRL_RTS : 0);
clear = (clear & TIOCM_DTR ? XR_USB_SERIAL_CTRL_DTR : 0) |
(clear & TIOCM_RTS ? XR_USB_SERIAL_CTRL_RTS : 0);
newctrl = (newctrl & ~clear) | set;
if (xr->ctrlout == newctrl)
return 0;
xr->ctrlout = newctrl;
if (newctrl & XR_USB_SERIAL_CTRL_DTR)
set_reg(xr, xr->reg_map.uart_gpio_clr_addr, 0x08);
else
set_reg(xr, xr->reg_map.uart_gpio_set_addr, 0x08);
if (newctrl & XR_USB_SERIAL_CTRL_RTS)
set_reg(xr, xr->reg_map.uart_gpio_clr_addr, 0x20);
else
set_reg(xr, xr->reg_map.uart_gpio_set_addr, 0x20);
return 0;
}
static struct reg_addr_map xr21b140x_reg_map;
static struct reg_addr_map xr21b1411_reg_map;
static struct reg_addr_map xr21v141x_reg_map;
static struct reg_addr_map xr21b142x_reg_map;
static void init_xr21b140x_reg_map(void)
{
xr21b140x_reg_map.uart_enable_addr = 0x00;
xr21b140x_reg_map.uart_format_addr = 0x05;
xr21b140x_reg_map.uart_flow_addr = 0x06;
xr21b140x_reg_map.uart_loopback_addr = 0x16;
xr21b140x_reg_map.uart_xon_char_addr = 0x07;
xr21b140x_reg_map.uart_xoff_char_addr = 0x08;
xr21b140x_reg_map.uart_gpio_mode_addr = 0x0c;
xr21b140x_reg_map.uart_gpio_dir_addr = 0x0d;
xr21b140x_reg_map.uart_gpio_set_addr = 0x0e;
xr21b140x_reg_map.uart_gpio_clr_addr = 0x0f;
xr21b140x_reg_map.uart_gpio_status_addr = 0x10;
xr21b140x_reg_map.tx_break_addr = 0x0a;
xr21b140x_reg_map.uart_custom_driver = 0x41;
}
static void init_xr21b1411_reg_map(void)
{
xr21b1411_reg_map.uart_enable_addr = 0xc00;
xr21b1411_reg_map.uart_flow_addr = 0xc06;
xr21b1411_reg_map.uart_loopback_addr = 0xc16;
xr21b1411_reg_map.uart_xon_char_addr = 0xc07;
xr21b1411_reg_map.uart_xoff_char_addr = 0xc08;
xr21b1411_reg_map.uart_gpio_mode_addr = 0xc0c;
xr21b1411_reg_map.uart_gpio_dir_addr = 0xc0d;
xr21b1411_reg_map.uart_gpio_set_addr = 0xc0e;
xr21b1411_reg_map.uart_gpio_clr_addr = 0xc0f;
xr21b1411_reg_map.uart_gpio_status_addr = 0xc10;
xr21b1411_reg_map.tx_break_addr = 0xc0a;
xr21b1411_reg_map.uart_custom_driver = 0x20d;
}
static void init_xr21v141x_reg_map(void)
{
xr21v141x_reg_map.uart_enable_addr = 0x03;
xr21v141x_reg_map.uart_format_addr = 0x0b;
xr21v141x_reg_map.uart_flow_addr = 0x0c;
xr21v141x_reg_map.uart_loopback_addr = 0x12;
xr21v141x_reg_map.uart_xon_char_addr = 0x10;
xr21v141x_reg_map.uart_xoff_char_addr = 0x11;
xr21v141x_reg_map.uart_gpio_mode_addr = 0x1a;
xr21v141x_reg_map.uart_gpio_dir_addr = 0x1b;
xr21v141x_reg_map.uart_gpio_set_addr = 0x1d;
xr21v141x_reg_map.uart_gpio_clr_addr = 0x1e;
xr21v141x_reg_map.uart_gpio_status_addr = 0x1f;
xr21v141x_reg_map.tx_break_addr = 0x14;
}
static void init_xr21b142x_reg_map(void)
{
xr21b142x_reg_map.uart_enable_addr = 0x00;
xr21b142x_reg_map.uart_flow_addr = 0x06;
xr21b142x_reg_map.uart_loopback_addr = 0x16;
xr21b142x_reg_map.uart_xon_char_addr = 0x07;
xr21b142x_reg_map.uart_xoff_char_addr = 0x08;
xr21b142x_reg_map.uart_gpio_mode_addr = 0x0c;
xr21b142x_reg_map.uart_gpio_dir_addr = 0x0d;
xr21b142x_reg_map.uart_gpio_set_addr = 0x0e;
xr21b142x_reg_map.uart_gpio_clr_addr = 0x0f;
xr21b142x_reg_map.uart_gpio_status_addr = 0x10;
xr21b140x_reg_map.tx_break_addr = 0x0a;
xr21b140x_reg_map.uart_custom_driver = 0x60;
xr21b140x_reg_map.uart_low_latency = 0x46;
}
int xr_usb_serial_pre_setup(struct xr_usb_serial *xr)
{
int ret = 0;
init_xr21b140x_reg_map();
init_xr21b1411_reg_map();
init_xr21v141x_reg_map();
init_xr21b142x_reg_map();
if ((xr->DeviceProduct & 0xfff0) == 0x1400) {
memcpy(&(xr->reg_map), &xr21b140x_reg_map,
sizeof(struct reg_addr_map));
} else if (xr->DeviceProduct == 0x1411) {
memcpy(&(xr->reg_map), &xr21b1411_reg_map,
sizeof(struct reg_addr_map));
} else if ((xr->DeviceProduct == 0x1410) ||
(xr->DeviceProduct == 0x1412) ||
(xr->DeviceProduct == 0x1414)) {
memcpy(&(xr->reg_map), &xr21v141x_reg_map,
sizeof(struct reg_addr_map));
} else if ((xr->DeviceProduct == 0x1420) ||
(xr->DeviceProduct == 0x1422) ||
(xr->DeviceProduct == 0x1424)) {
memcpy(&(xr->reg_map), &xr21b142x_reg_map,
sizeof(struct reg_addr_map));
} else {
ret = -1;
}
if (xr->reg_map.uart_custom_driver)
set_reg(xr, xr->reg_map.uart_custom_driver, 1);
set_reg(xr, xr->reg_map.uart_gpio_mode_addr, 0);
set_reg(xr, xr->reg_map.uart_gpio_dir_addr, 0x28);
set_reg(xr, xr->reg_map.uart_gpio_set_addr,
UART_GPIO_SET_DTR | UART_GPIO_SET_RTS);
return ret;
}
/*
* Write buffer management.
* All of these assume proper locks taken by the caller.
*/
static int xr_usb_serial_wb_alloc(struct xr_usb_serial *xr)
{
int i, wbn;
struct xr_usb_serial_wb *wb;
wbn = 0;
i = 0;
for (;; ) {
wb = &xr->wb[wbn];
if (!wb->use) {
wb->use = 1;
return wbn;
}
wbn = (wbn + 1) % XR_USB_SERIAL_NW;
if (++i >= XR_USB_SERIAL_NW)
return -1;
}
}
static int xr_usb_serial_wb_is_avail(struct xr_usb_serial *xr)
{
int i, n;
unsigned long flags;
n = XR_USB_SERIAL_NW;
spin_lock_irqsave(&xr->write_lock, flags);
for (i = 0; i < XR_USB_SERIAL_NW; i++)
n -= xr->wb[i].use;
spin_unlock_irqrestore(&xr->write_lock, flags);
return n;
}
/*
* Finish write. Caller must hold xr->write_lock
*/
static void xr_usb_serial_write_done(struct xr_usb_serial *xr,
struct xr_usb_serial_wb *wb)
{
wb->use = 0;
xr->transmitting--;
usb_autopm_put_interface_async(xr->control);
}
/*
* Poke write.
*
* the caller is responsible for locking
*/
static int xr_usb_serial_start_wb(struct xr_usb_serial *xr,
struct xr_usb_serial_wb *wb)
{
int rc;
xr->transmitting++;
wb->urb->transfer_buffer = wb->buf;
wb->urb->transfer_dma = wb->dmah;
wb->urb->transfer_buffer_length = wb->len;
wb->urb->dev = xr->dev;
rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
if (rc < 0) {
dev_err(&xr->data->dev,
"%s - usb_submit_urb(write bulk) failed: %d\n",
__func__, rc);
xr_usb_serial_write_done(xr, wb);
}
return rc;
}
/*
* attributes exported through sysfs
*/
static ssize_t show_caps
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct xr_usb_serial *xr = usb_get_intfdata(intf);
return sprintf(buf, "%d", xr->ctrl_caps);
}
static DEVICE_ATTR(bmCapabilities, 0444, show_caps, NULL);
static ssize_t show_country_codes
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct xr_usb_serial *xr = usb_get_intfdata(intf);
memcpy(buf, xr->country_codes, xr->country_code_size);
return xr->country_code_size;
}
static DEVICE_ATTR(wCountryCodes, 0444, show_country_codes, NULL);
static ssize_t show_country_rel_date
(struct device *dev, struct device_attribute *attr, char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct xr_usb_serial *xr = usb_get_intfdata(intf);
return sprintf(buf, "%d", xr->country_rel_date);
}
static DEVICE_ATTR(iCountryCodeRelDate, 0444, show_country_rel_date, NULL);
/*
* Interrupt handlers for various XR_USB_SERIAL device responses
*/
/* control interface reports status changes with "interrupt" transfers */
static void xr_usb_serial_ctrl_irq(struct urb *urb)
{
struct xr_usb_serial *xr = urb->context;
struct usb_cdc_notification *dr = urb->transfer_buffer;
unsigned char *data;
int newctrl;
int retval;
int status = urb->status;
int i;
unsigned char *p;
switch (status) {
case 0:
p = (unsigned char *)(urb->transfer_buffer);
for (i = 0; i < urb->actual_length; i++)
dev_dbg(&xr->control->dev, "0x%02x\n", p[i]);
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dev_dbg(&xr->control->dev,
"%s - urb shutting down with status: %d\n",
__func__, status);
return;
default:
dev_dbg(&xr->control->dev,
"%s - nonzero urb status received: %d\n",
__func__, status);
goto exit;
}
usb_mark_last_busy(xr->dev);
data = (unsigned char *)(dr + 1);
switch (dr->bNotificationType) {
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
dev_dbg(&xr->control->dev, "%s - network connection: %d\n",
__func__, dr->wValue);
break;
case USB_CDC_NOTIFY_SERIAL_STATE:
newctrl = get_unaligned_le16(data);
if (!xr->clocal &&
(xr->ctrlin & ~newctrl & XR_USB_SERIAL_CTRL_DCD)) {
dev_dbg(&xr->control->dev, "%s - calling hangup\n",
__func__);
tty_port_tty_hangup(&xr->port, false);
}
xr->ctrlin = newctrl;
dev_dbg(&xr->control->dev,
"%s - input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c\n",
__func__,
xr->ctrlin & XR_USB_SERIAL_CTRL_DCD ? '+' : '-',
xr->ctrlin & XR_USB_SERIAL_CTRL_DSR ? '+' : '-',
xr->ctrlin & XR_USB_SERIAL_CTRL_BRK ? '+' : '-',
xr->ctrlin & XR_USB_SERIAL_CTRL_RI ? '+' : '-',
xr->ctrlin & XR_USB_SERIAL_CTRL_FRAMING ? '+' : '-',
xr->ctrlin & XR_USB_SERIAL_CTRL_PARITY ? '+' : '-',