123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116 |
- // SPDX-License-Identifier: GPL-2.0
- /*
- * Fintek F81232 USB to serial adaptor driver
- * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver
- *
- * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)
- * Copyright (C) 2012 Linux Foundation
- */
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/slab.h>
- #include <linux/tty.h>
- #include <linux/tty_driver.h>
- #include <linux/tty_flip.h>
- #include <linux/serial.h>
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/mutex.h>
- #include <linux/uaccess.h>
- #include <linux/usb.h>
- #include <linux/usb/serial.h>
- #include <linux/serial_reg.h>
- #define F81232_ID \
- { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */
- #define F81534A_SERIES_ID \
- { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \
- { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \
- { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */
- #define F81534A_CTRL_ID \
- { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */
- static const struct usb_device_id f81232_id_table[] = {
- F81232_ID,
- { } /* Terminating entry */
- };
- static const struct usb_device_id f81534a_id_table[] = {
- F81534A_SERIES_ID,
- { } /* Terminating entry */
- };
- static const struct usb_device_id f81534a_ctrl_id_table[] = {
- F81534A_CTRL_ID,
- { } /* Terminating entry */
- };
- static const struct usb_device_id combined_id_table[] = {
- F81232_ID,
- F81534A_SERIES_ID,
- F81534A_CTRL_ID,
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE(usb, combined_id_table);
- /* Maximum baudrate for F81232 */
- #define F81232_MAX_BAUDRATE 1500000
- #define F81232_DEF_BAUDRATE 9600
- /* USB Control EP parameter */
- #define F81232_REGISTER_REQUEST 0xa0
- #define F81232_GET_REGISTER 0xc0
- #define F81232_SET_REGISTER 0x40
- #define F81534A_ACCESS_REG_RETRY 2
- #define SERIAL_BASE_ADDRESS 0x0120
- #define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS)
- #define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS)
- #define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS)
- #define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS)
- #define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
- #define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS)
- #define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
- /*
- * F81232 Clock registers (106h)
- *
- * Bit1-0: Clock source selector
- * 00: 1.846MHz.
- * 01: 18.46MHz.
- * 10: 24MHz.
- * 11: 14.77MHz.
- */
- #define F81232_CLK_REGISTER 0x106
- #define F81232_CLK_1_846_MHZ 0
- #define F81232_CLK_18_46_MHZ BIT(0)
- #define F81232_CLK_24_MHZ BIT(1)
- #define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0))
- #define F81232_CLK_MASK GENMASK(1, 0)
- #define F81534A_MODE_REG 0x107
- #define F81534A_TRIGGER_MASK GENMASK(3, 2)
- #define F81534A_TRIGGER_MULTIPLE_4X BIT(3)
- #define F81534A_FIFO_128BYTE (BIT(1) | BIT(0))
- /* Serial port self GPIO control, 2bytes [control&output data][input data] */
- #define F81534A_GPIO_REG 0x10e
- #define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */
- #define F81534A_GPIO_MODE1_DIR BIT(5)
- #define F81534A_GPIO_MODE0_DIR BIT(4)
- #define F81534A_GPIO_MODE2_OUTPUT BIT(2)
- #define F81534A_GPIO_MODE1_OUTPUT BIT(1)
- #define F81534A_GPIO_MODE0_OUTPUT BIT(0)
- #define F81534A_CTRL_CMD_ENABLE_PORT 0x116
- struct f81232_private {
- struct mutex lock;
- u8 modem_control;
- u8 modem_status;
- u8 shadow_lcr;
- speed_t baud_base;
- struct work_struct lsr_work;
- struct work_struct interrupt_work;
- struct usb_serial_port *port;
- };
- static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
- static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ,
- F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ };
- static int calc_baud_divisor(speed_t baudrate, speed_t clockrate)
- {
- if (!baudrate)
- return 0;
- return DIV_ROUND_CLOSEST(clockrate, baudrate);
- }
- static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
- {
- int status;
- u8 *tmp;
- struct usb_device *dev = port->serial->dev;
- tmp = kmalloc(sizeof(*val), GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
- status = usb_control_msg(dev,
- usb_rcvctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_GET_REGISTER,
- reg,
- 0,
- tmp,
- sizeof(*val),
- USB_CTRL_GET_TIMEOUT);
- if (status != sizeof(*val)) {
- dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
- if (status < 0)
- status = usb_translate_errors(status);
- else
- status = -EIO;
- } else {
- status = 0;
- *val = *tmp;
- }
- kfree(tmp);
- return status;
- }
- static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
- {
- int status;
- u8 *tmp;
- struct usb_device *dev = port->serial->dev;
- tmp = kmalloc(sizeof(val), GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
- *tmp = val;
- status = usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_SET_REGISTER,
- reg,
- 0,
- tmp,
- sizeof(val),
- USB_CTRL_SET_TIMEOUT);
- if (status != sizeof(val)) {
- dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
- if (status < 0)
- status = usb_translate_errors(status);
- else
- status = -EIO;
- } else {
- status = 0;
- }
- kfree(tmp);
- return status;
- }
- static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg,
- u8 mask, u8 val)
- {
- int status;
- u8 tmp;
- status = f81232_get_register(port, reg, &tmp);
- if (status)
- return status;
- tmp = (tmp & ~mask) | (val & mask);
- return f81232_set_register(port, reg, tmp);
- }
- static void f81232_read_msr(struct usb_serial_port *port)
- {
- int status;
- u8 current_msr;
- struct tty_struct *tty;
- struct f81232_private *priv = usb_get_serial_port_data(port);
- mutex_lock(&priv->lock);
- status = f81232_get_register(port, MODEM_STATUS_REGISTER,
- ¤t_msr);
- if (status) {
- dev_err(&port->dev, "%s fail, status: %d\n", __func__, status);
- mutex_unlock(&priv->lock);
- return;
- }
- if (!(current_msr & UART_MSR_ANY_DELTA)) {
- mutex_unlock(&priv->lock);
- return;
- }
- priv->modem_status = current_msr;
- if (current_msr & UART_MSR_DCTS)
- port->icount.cts++;
- if (current_msr & UART_MSR_DDSR)
- port->icount.dsr++;
- if (current_msr & UART_MSR_TERI)
- port->icount.rng++;
- if (current_msr & UART_MSR_DDCD) {
- port->icount.dcd++;
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- usb_serial_handle_dcd_change(port, tty,
- current_msr & UART_MSR_DCD);
- tty_kref_put(tty);
- }
- }
- wake_up_interruptible(&port->port.delta_msr_wait);
- mutex_unlock(&priv->lock);
- }
- static int f81232_set_mctrl(struct usb_serial_port *port,
- unsigned int set, unsigned int clear)
- {
- u8 val;
- int status;
- struct f81232_private *priv = usb_get_serial_port_data(port);
- if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
- return 0; /* no change */
- /* 'set' takes precedence over 'clear' */
- clear &= ~set;
- /* force enable interrupt with OUT2 */
- mutex_lock(&priv->lock);
- val = UART_MCR_OUT2 | priv->modem_control;
- if (clear & TIOCM_DTR)
- val &= ~UART_MCR_DTR;
- if (clear & TIOCM_RTS)
- val &= ~UART_MCR_RTS;
- if (set & TIOCM_DTR)
- val |= UART_MCR_DTR;
- if (set & TIOCM_RTS)
- val |= UART_MCR_RTS;
- dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__,
- val, priv->modem_control);
- status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val);
- if (status) {
- dev_err(&port->dev, "%s set MCR status < 0\n", __func__);
- mutex_unlock(&priv->lock);
- return status;
- }
- priv->modem_control = val;
- mutex_unlock(&priv->lock);
- return 0;
- }
- static void f81232_update_line_status(struct usb_serial_port *port,
- unsigned char *data,
- size_t actual_length)
- {
- struct f81232_private *priv = usb_get_serial_port_data(port);
- if (!actual_length)
- return;
- switch (data[0] & 0x07) {
- case 0x00: /* msr change */
- dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]);
- schedule_work(&priv->interrupt_work);
- break;
- case 0x02: /* tx-empty */
- break;
- case 0x04: /* rx data available */
- break;
- case 0x06: /* lsr change */
- /* we can forget it. the LSR will read from bulk-in */
- dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]);
- break;
- }
- }
- static void f81232_read_int_callback(struct urb *urb)
- {
- struct usb_serial_port *port = urb->context;
- unsigned char *data = urb->transfer_buffer;
- unsigned int actual_length = urb->actual_length;
- int status = urb->status;
- int retval;
- switch (status) {
- case 0:
- /* success */
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- /* this urb is terminated, clean up */
- dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
- __func__, status);
- return;
- default:
- dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
- __func__, status);
- goto exit;
- }
- usb_serial_debug_data(&port->dev, __func__,
- urb->actual_length, urb->transfer_buffer);
- f81232_update_line_status(port, data, actual_length);
- exit:
- retval = usb_submit_urb(urb, GFP_ATOMIC);
- if (retval)
- dev_err(&urb->dev->dev,
- "%s - usb_submit_urb failed with result %d\n",
- __func__, retval);
- }
- static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr)
- {
- struct f81232_private *priv = usb_get_serial_port_data(port);
- char tty_flag = TTY_NORMAL;
- if (!(lsr & UART_LSR_BRK_ERROR_BITS))
- return tty_flag;
- if (lsr & UART_LSR_BI) {
- tty_flag = TTY_BREAK;
- port->icount.brk++;
- usb_serial_handle_break(port);
- } else if (lsr & UART_LSR_PE) {
- tty_flag = TTY_PARITY;
- port->icount.parity++;
- } else if (lsr & UART_LSR_FE) {
- tty_flag = TTY_FRAME;
- port->icount.frame++;
- }
- if (lsr & UART_LSR_OE) {
- port->icount.overrun++;
- schedule_work(&priv->lsr_work);
- tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
- }
- return tty_flag;
- }
- static void f81232_process_read_urb(struct urb *urb)
- {
- struct usb_serial_port *port = urb->context;
- unsigned char *data = urb->transfer_buffer;
- char tty_flag;
- unsigned int i;
- u8 lsr;
- /*
- * When opening the port we get a 1-byte packet with the current LSR,
- * which we discard.
- */
- if ((urb->actual_length < 2) || (urb->actual_length % 2))
- return;
- /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
- for (i = 0; i < urb->actual_length; i += 2) {
- lsr = data[i];
- tty_flag = f81232_handle_lsr(port, lsr);
- if (port->sysrq) {
- if (usb_serial_handle_sysrq_char(port, data[i + 1]))
- continue;
- }
- tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
- }
- tty_flip_buffer_push(&port->port);
- }
- static void f81534a_process_read_urb(struct urb *urb)
- {
- struct usb_serial_port *port = urb->context;
- unsigned char *data = urb->transfer_buffer;
- char tty_flag;
- unsigned int i;
- u8 lsr;
- u8 len;
- if (urb->actual_length < 3) {
- dev_err(&port->dev, "short message received: %d\n",
- urb->actual_length);
- return;
- }
- len = data[0];
- if (len != urb->actual_length) {
- dev_err(&port->dev, "malformed message received: %d (%d)\n",
- urb->actual_length, len);
- return;
- }
- /* bulk-in data: [LEN][Data.....][LSR] */
- lsr = data[len - 1];
- tty_flag = f81232_handle_lsr(port, lsr);
- if (port->sysrq) {
- for (i = 1; i < len - 1; ++i) {
- if (!usb_serial_handle_sysrq_char(port, data[i])) {
- tty_insert_flip_char(&port->port, data[i],
- tty_flag);
- }
- }
- } else {
- tty_insert_flip_string_fixed_flag(&port->port, &data[1],
- tty_flag, len - 2);
- }
- tty_flip_buffer_push(&port->port);
- }
- static void f81232_break_ctl(struct tty_struct *tty, int break_state)
- {
- struct usb_serial_port *port = tty->driver_data;
- struct f81232_private *priv = usb_get_serial_port_data(port);
- int status;
- mutex_lock(&priv->lock);
- if (break_state)
- priv->shadow_lcr |= UART_LCR_SBC;
- else
- priv->shadow_lcr &= ~UART_LCR_SBC;
- status = f81232_set_register(port, LINE_CONTROL_REGISTER,
- priv->shadow_lcr);
- if (status)
- dev_err(&port->dev, "set break failed: %d\n", status);
- mutex_unlock(&priv->lock);
- }
- static int f81232_find_clk(speed_t baudrate)
- {
- int idx;
- for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
- if (baudrate <= baudrate_table[idx] &&
- baudrate_table[idx] % baudrate == 0)
- return idx;
- }
- return -EINVAL;
- }
- static void f81232_set_baudrate(struct tty_struct *tty,
- struct usb_serial_port *port, speed_t baudrate,
- speed_t old_baudrate)
- {
- struct f81232_private *priv = usb_get_serial_port_data(port);
- u8 lcr;
- int divisor;
- int status = 0;
- int i;
- int idx;
- speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE };
- for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
- idx = f81232_find_clk(baud_list[i]);
- if (idx >= 0) {
- baudrate = baud_list[i];
- tty_encode_baud_rate(tty, baudrate, baudrate);
- break;
- }
- }
- if (idx < 0)
- return;
- priv->baud_base = baudrate_table[idx];
- divisor = calc_baud_divisor(baudrate, priv->baud_base);
- status = f81232_set_mask_register(port, F81232_CLK_REGISTER,
- F81232_CLK_MASK, clock_table[idx]);
- if (status) {
- dev_err(&port->dev, "%s failed to set CLK_REG: %d\n",
- __func__, status);
- return;
- }
- status = f81232_get_register(port, LINE_CONTROL_REGISTER,
- &lcr); /* get LCR */
- if (status) {
- dev_err(&port->dev, "%s failed to get LCR: %d\n",
- __func__, status);
- return;
- }
- status = f81232_set_register(port, LINE_CONTROL_REGISTER,
- lcr | UART_LCR_DLAB); /* Enable DLAB */
- if (status) {
- dev_err(&port->dev, "%s failed to set DLAB: %d\n",
- __func__, status);
- return;
- }
- status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER,
- divisor & 0x00ff); /* low */
- if (status) {
- dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n",
- __func__, status);
- goto reapply_lcr;
- }
- status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
- (divisor & 0xff00) >> 8); /* high */
- if (status) {
- dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n",
- __func__, status);
- }
- reapply_lcr:
- status = f81232_set_register(port, LINE_CONTROL_REGISTER,
- lcr & ~UART_LCR_DLAB);
- if (status) {
- dev_err(&port->dev, "%s failed to set DLAB: %d\n",
- __func__, status);
- }
- }
- static int f81232_port_enable(struct usb_serial_port *port)
- {
- u8 val;
- int status;
- /* fifo on, trigger8, clear TX/RX*/
- val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT;
- status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
- if (status) {
- dev_err(&port->dev, "%s failed to set FCR: %d\n",
- __func__, status);
- return status;
- }
- /* MSR Interrupt only, LSR will read from Bulk-in odd byte */
- status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
- UART_IER_MSI);
- if (status) {
- dev_err(&port->dev, "%s failed to set IER: %d\n",
- __func__, status);
- return status;
- }
- return 0;
- }
- static int f81232_port_disable(struct usb_serial_port *port)
- {
- int status;
- status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0);
- if (status) {
- dev_err(&port->dev, "%s failed to set IER: %d\n",
- __func__, status);
- return status;
- }
- return 0;
- }
- static void f81232_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
- {
- struct f81232_private *priv = usb_get_serial_port_data(port);
- u8 new_lcr = 0;
- int status = 0;
- speed_t baudrate;
- speed_t old_baud;
- /* Don't change anything if nothing has changed */
- if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
- return;
- if (C_BAUD(tty) == B0)
- f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
- else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
- f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
- baudrate = tty_get_baud_rate(tty);
- if (baudrate > 0) {
- if (old_termios)
- old_baud = tty_termios_baud_rate(old_termios);
- else
- old_baud = F81232_DEF_BAUDRATE;
- f81232_set_baudrate(tty, port, baudrate, old_baud);
- }
- if (C_PARENB(tty)) {
- new_lcr |= UART_LCR_PARITY;
- if (!C_PARODD(tty))
- new_lcr |= UART_LCR_EPAR;
- if (C_CMSPAR(tty))
- new_lcr |= UART_LCR_SPAR;
- }
- if (C_CSTOPB(tty))
- new_lcr |= UART_LCR_STOP;
- switch (C_CSIZE(tty)) {
- case CS5:
- new_lcr |= UART_LCR_WLEN5;
- break;
- case CS6:
- new_lcr |= UART_LCR_WLEN6;
- break;
- case CS7:
- new_lcr |= UART_LCR_WLEN7;
- break;
- default:
- case CS8:
- new_lcr |= UART_LCR_WLEN8;
- break;
- }
- mutex_lock(&priv->lock);
- new_lcr |= (priv->shadow_lcr & UART_LCR_SBC);
- status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
- if (status) {
- dev_err(&port->dev, "%s failed to set LCR: %d\n",
- __func__, status);
- }
- priv->shadow_lcr = new_lcr;
- mutex_unlock(&priv->lock);
- }
- static int f81232_tiocmget(struct tty_struct *tty)
- {
- int r;
- struct usb_serial_port *port = tty->driver_data;
- struct f81232_private *port_priv = usb_get_serial_port_data(port);
- u8 mcr, msr;
- /* force get current MSR changed state */
- f81232_read_msr(port);
- mutex_lock(&port_priv->lock);
- mcr = port_priv->modem_control;
- msr = port_priv->modem_status;
- mutex_unlock(&port_priv->lock);
- r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
- (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
- (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
- (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
- (msr & UART_MSR_RI ? TIOCM_RI : 0) |
- (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
- return r;
- }
- static int f81232_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
- {
- struct usb_serial_port *port = tty->driver_data;
- return f81232_set_mctrl(port, set, clear);
- }
- static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
- {
- int result;
- result = f81232_port_enable(port);
- if (result)
- return result;
- /* Setup termios */
- if (tty)
- f81232_set_termios(tty, port, NULL);
- result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
- if (result) {
- dev_err(&port->dev, "%s - failed submitting interrupt urb,"
- " error %d\n", __func__, result);
- return result;
- }
- result = usb_serial_generic_open(tty, port);
- if (result) {
- usb_kill_urb(port->interrupt_in_urb);
- return result;
- }
- return 0;
- }
- static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)
- {
- int status;
- u8 mask;
- u8 val;
- val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE;
- mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE;
- status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val);
- if (status) {
- dev_err(&port->dev, "failed to set MODE_REG: %d\n", status);
- return status;
- }
- return f81232_open(tty, port);
- }
- static void f81232_close(struct usb_serial_port *port)
- {
- struct f81232_private *port_priv = usb_get_serial_port_data(port);
- f81232_port_disable(port);
- usb_serial_generic_close(port);
- usb_kill_urb(port->interrupt_in_urb);
- flush_work(&port_priv->interrupt_work);
- flush_work(&port_priv->lsr_work);
- }
- static void f81232_dtr_rts(struct usb_serial_port *port, int on)
- {
- if (on)
- f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
- else
- f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
- }
- static bool f81232_tx_empty(struct usb_serial_port *port)
- {
- int status;
- u8 tmp;
- status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
- if (!status) {
- if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT)
- return false;
- }
- return true;
- }
- static int f81232_carrier_raised(struct usb_serial_port *port)
- {
- u8 msr;
- struct f81232_private *priv = usb_get_serial_port_data(port);
- mutex_lock(&priv->lock);
- msr = priv->modem_status;
- mutex_unlock(&priv->lock);
- if (msr & UART_MSR_DCD)
- return 1;
- return 0;
- }
- static int f81232_get_serial_info(struct tty_struct *tty,
- struct serial_struct *ss)
- {
- struct usb_serial_port *port = tty->driver_data;
- struct f81232_private *priv = usb_get_serial_port_data(port);
- ss->type = PORT_16550A;
- ss->line = port->minor;
- ss->port = port->port_number;
- ss->baud_base = priv->baud_base;
- return 0;
- }
- static void f81232_interrupt_work(struct work_struct *work)
- {
- struct f81232_private *priv =
- container_of(work, struct f81232_private, interrupt_work);
- f81232_read_msr(priv->port);
- }
- static void f81232_lsr_worker(struct work_struct *work)
- {
- struct f81232_private *priv;
- struct usb_serial_port *port;
- int status;
- u8 tmp;
- priv = container_of(work, struct f81232_private, lsr_work);
- port = priv->port;
- status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
- if (status)
- dev_warn(&port->dev, "read LSR failed: %d\n", status);
- }
- static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
- u16 size, void *val)
- {
- struct usb_device *dev = interface_to_usbdev(intf);
- int retry = F81534A_ACCESS_REG_RETRY;
- int status;
- u8 *tmp;
- tmp = kmemdup(val, size, GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
- while (retry--) {
- status = usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_SET_REGISTER,
- reg,
- 0,
- tmp,
- size,
- USB_CTRL_SET_TIMEOUT);
- if (status < 0) {
- status = usb_translate_errors(status);
- if (status == -EIO)
- continue;
- } else if (status != size) {
- /* Retry on short transfers */
- status = -EIO;
- continue;
- } else {
- status = 0;
- }
- break;
- }
- if (status) {
- dev_err(&intf->dev, "failed to set register 0x%x: %d\n",
- reg, status);
- }
- kfree(tmp);
- return status;
- }
- static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en)
- {
- unsigned char enable[2] = {0};
- int status;
- /*
- * Enable all available serial ports, define as following:
- * bit 15 : Reset behavior (when HUB got soft reset)
- * 0: maintain all serial port enabled state.
- * 1: disable all serial port.
- * bit 0~11 : Serial port enable bit.
- */
- if (en) {
- enable[0] = 0xff;
- enable[1] = 0x8f;
- }
- status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT,
- sizeof(enable), enable);
- if (status)
- dev_err(&intf->dev, "failed to enable ports: %d\n", status);
- return status;
- }
- static int f81534a_ctrl_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
- {
- return f81534a_ctrl_enable_all_ports(intf, true);
- }
- static void f81534a_ctrl_disconnect(struct usb_interface *intf)
- {
- f81534a_ctrl_enable_all_ports(intf, false);
- }
- static int f81534a_ctrl_resume(struct usb_interface *intf)
- {
- return f81534a_ctrl_enable_all_ports(intf, true);
- }
- static int f81232_port_probe(struct usb_serial_port *port)
- {
- struct f81232_private *priv;
- priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- mutex_init(&priv->lock);
- INIT_WORK(&priv->interrupt_work, f81232_interrupt_work);
- INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
- usb_set_serial_port_data(port, priv);
- port->port.drain_delay = 256;
- priv->port = port;
- return 0;
- }
- static int f81534a_port_probe(struct usb_serial_port *port)
- {
- int status;
- /* tri-state with pull-high, default RS232 Mode */
- status = f81232_set_register(port, F81534A_GPIO_REG,
- F81534A_GPIO_MODE2_DIR);
- if (status)
- return status;
- return f81232_port_probe(port);
- }
- static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
- {
- struct usb_serial_port *port = serial->port[0];
- struct f81232_private *port_priv = usb_get_serial_port_data(port);
- int i;
- for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
- usb_kill_urb(port->read_urbs[i]);
- usb_kill_urb(port->interrupt_in_urb);
- if (port_priv) {
- flush_work(&port_priv->interrupt_work);
- flush_work(&port_priv->lsr_work);
- }
- return 0;
- }
- static int f81232_resume(struct usb_serial *serial)
- {
- struct usb_serial_port *port = serial->port[0];
- int result;
- if (tty_port_initialized(&port->port)) {
- result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
- if (result) {
- dev_err(&port->dev, "submit interrupt urb failed: %d\n",
- result);
- return result;
- }
- }
- return usb_serial_generic_resume(serial);
- }
- static struct usb_serial_driver f81232_device = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "f81232",
- },
- .id_table = f81232_id_table,
- .num_ports = 1,
- .bulk_in_size = 256,
- .bulk_out_size = 256,
- .open = f81232_open,
- .close = f81232_close,
- .dtr_rts = f81232_dtr_rts,
- .carrier_raised = f81232_carrier_raised,
- .get_serial = f81232_get_serial_info,
- .break_ctl = f81232_break_ctl,
- .set_termios = f81232_set_termios,
- .tiocmget = f81232_tiocmget,
- .tiocmset = f81232_tiocmset,
- .tiocmiwait = usb_serial_generic_tiocmiwait,
- .tx_empty = f81232_tx_empty,
- .process_read_urb = f81232_process_read_urb,
- .read_int_callback = f81232_read_int_callback,
- .port_probe = f81232_port_probe,
- .suspend = f81232_suspend,
- .resume = f81232_resume,
- };
- static struct usb_serial_driver f81534a_device = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "f81534a",
- },
- .id_table = f81534a_id_table,
- .num_ports = 1,
- .open = f81534a_open,
- .close = f81232_close,
- .dtr_rts = f81232_dtr_rts,
- .carrier_raised = f81232_carrier_raised,
- .get_serial = f81232_get_serial_info,
- .break_ctl = f81232_break_ctl,
- .set_termios = f81232_set_termios,
- .tiocmget = f81232_tiocmget,
- .tiocmset = f81232_tiocmset,
- .tiocmiwait = usb_serial_generic_tiocmiwait,
- .tx_empty = f81232_tx_empty,
- .process_read_urb = f81534a_process_read_urb,
- .read_int_callback = f81232_read_int_callback,
- .port_probe = f81534a_port_probe,
- .suspend = f81232_suspend,
- .resume = f81232_resume,
- };
- static struct usb_serial_driver * const serial_drivers[] = {
- &f81232_device,
- &f81534a_device,
- NULL,
- };
- static struct usb_driver f81534a_ctrl_driver = {
- .name = "f81534a_ctrl",
- .id_table = f81534a_ctrl_id_table,
- .probe = f81534a_ctrl_probe,
- .disconnect = f81534a_ctrl_disconnect,
- .resume = f81534a_ctrl_resume,
- };
- static int __init f81232_init(void)
- {
- int status;
- status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE,
- KBUILD_MODNAME);
- if (status)
- return status;
- status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME,
- combined_id_table);
- if (status) {
- usb_deregister(&f81534a_ctrl_driver);
- return status;
- }
- return 0;
- }
- static void __exit f81232_exit(void)
- {
- usb_serial_deregister_drivers(serial_drivers);
- usb_deregister(&f81534a_ctrl_driver);
- }
- module_init(f81232_init);
- module_exit(f81232_exit);
- MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
- MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
- MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
- MODULE_LICENSE("GPL v2");
|