summaryrefslogtreecommitdiff
path: root/drivers/usb/serial/cp210x.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/serial/cp210x.c')
-rw-r--r--drivers/usb/serial/cp210x.c822
1 files changed, 822 insertions, 0 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
new file mode 100644
index 000000000000..e8d5133ce9c8
--- /dev/null
+++ b/drivers/usb/serial/cp210x.c
@@ -0,0 +1,822 @@
+/*
+ * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver
+ *
+ * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * Support to set flow control line levels using TIOCMGET and TIOCMSET
+ * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
+ * control thanks to Munir Nassar nassarmu@real-time.com
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/usb.h>
+#include <linux/uaccess.h>
+#include <linux/usb/serial.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.08"
+#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
+
+/*
+ * Function Prototypes
+ */
+static int cp2101_open(struct tty_struct *, struct usb_serial_port *,
+ struct file *);
+static void cp2101_cleanup(struct usb_serial_port *);
+static void cp2101_close(struct tty_struct *, struct usb_serial_port *,
+ struct file*);
+static void cp2101_get_termios(struct tty_struct *,
+ struct usb_serial_port *port);
+static void cp2101_get_termios_port(struct usb_serial_port *port,
+ unsigned int *cflagp, unsigned int *baudp);
+static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *,
+ struct ktermios*);
+static int cp2101_tiocmget(struct tty_struct *, struct file *);
+static int cp2101_tiocmset(struct tty_struct *, struct file *,
+ unsigned int, unsigned int);
+static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *,
+ unsigned int, unsigned int);
+static void cp2101_break_ctl(struct tty_struct *, int);
+static int cp2101_startup(struct usb_serial *);
+static void cp2101_shutdown(struct usb_serial *);
+
+static int debug;
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
+ { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
+ { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
+ { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
+ { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
+ { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
+ { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
+ { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
+ { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
+ { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
+ { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
+ { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
+ { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
+ { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
+ { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
+ { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
+ { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
+ { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
+ { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
+ { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
+ { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
+ { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
+ { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
+ { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
+ { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
+ { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
+ { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
+ { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
+ { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
+ { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
+ { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
+ { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
+ { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
+ { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
+ { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
+ { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
+ { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
+ { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
+ { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
+ { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
+ { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
+ { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
+ { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
+ { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
+ { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
+ { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
+ { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
+ { } /* Terminating Entry */
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver cp2101_driver = {
+ .name = "cp2101",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+ .no_dynamic_id = 1,
+};
+
+static struct usb_serial_driver cp2101_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "cp2101",
+ },
+ .usb_driver = &cp2101_driver,
+ .id_table = id_table,
+ .num_ports = 1,
+ .open = cp2101_open,
+ .close = cp2101_close,
+ .break_ctl = cp2101_break_ctl,
+ .set_termios = cp2101_set_termios,
+ .tiocmget = cp2101_tiocmget,
+ .tiocmset = cp2101_tiocmset,
+ .attach = cp2101_startup,
+ .shutdown = cp2101_shutdown,
+};
+
+/* Config request types */
+#define REQTYPE_HOST_TO_DEVICE 0x41
+#define REQTYPE_DEVICE_TO_HOST 0xc1
+
+/* Config SET requests. To GET, add 1 to the request number */
+#define CP2101_UART 0x00 /* Enable / Disable */
+#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
+#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
+#define CP2101_BREAK 0x05 /* On / Off */
+#define CP2101_CONTROL 0x07 /* Flow control line states */
+#define CP2101_MODEMCTL 0x13 /* Modem controls */
+#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
+
+/* CP2101_UART */
+#define UART_ENABLE 0x0001
+#define UART_DISABLE 0x0000
+
+/* CP2101_BAUDRATE */
+#define BAUD_RATE_GEN_FREQ 0x384000
+
+/* CP2101_BITS */
+#define BITS_DATA_MASK 0X0f00
+#define BITS_DATA_5 0X0500
+#define BITS_DATA_6 0X0600
+#define BITS_DATA_7 0X0700
+#define BITS_DATA_8 0X0800
+#define BITS_DATA_9 0X0900
+
+#define BITS_PARITY_MASK 0x00f0
+#define BITS_PARITY_NONE 0x0000
+#define BITS_PARITY_ODD 0x0010
+#define BITS_PARITY_EVEN 0x0020
+#define BITS_PARITY_MARK 0x0030
+#define BITS_PARITY_SPACE 0x0040
+
+#define BITS_STOP_MASK 0x000f
+#define BITS_STOP_1 0x0000
+#define BITS_STOP_1_5 0x0001
+#define BITS_STOP_2 0x0002
+
+/* CP2101_BREAK */
+#define BREAK_ON 0x0000
+#define BREAK_OFF 0x0001
+
+/* CP2101_CONTROL */
+#define CONTROL_DTR 0x0001
+#define CONTROL_RTS 0x0002
+#define CONTROL_CTS 0x0010
+#define CONTROL_DSR 0x0020
+#define CONTROL_RING 0x0040
+#define CONTROL_DCD 0x0080
+#define CONTROL_WRITE_DTR 0x0100
+#define CONTROL_WRITE_RTS 0x0200
+
+/*
+ * cp2101_get_config
+ * Reads from the CP2101 configuration registers
+ * 'size' is specified in bytes.
+ * 'data' is a pointer to a pre-allocated array of integers large
+ * enough to hold 'size' bytes (with 4 bytes to each integer)
+ */
+static int cp2101_get_config(struct usb_serial_port *port, u8 request,
+ unsigned int *data, int size)
+{
+ struct usb_serial *serial = port->serial;
+ __le32 *buf;
+ int result, i, length;
+
+ /* Number of integers required to contain the array */
+ length = (((size - 1) | 3) + 1)/4;
+
+ buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
+ if (!buf) {
+ dev_err(&port->dev, "%s - out of memory.\n", __func__);
+ return -ENOMEM;
+ }
+
+ /* For get requests, the request number must be incremented */
+ request++;
+
+ /* Issue the request, attempting to read 'size' bytes */
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ request, REQTYPE_DEVICE_TO_HOST, 0x0000,
+ 0, buf, size, 300);
+
+ /* Convert data into an array of integers */
+ for (i = 0; i < length; i++)
+ data[i] = le32_to_cpu(buf[i]);
+
+ kfree(buf);
+
+ if (result != size) {
+ dbg("%s - Unable to send config request, "
+ "request=0x%x size=%d result=%d\n",
+ __func__, request, size, result);
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+/*
+ * cp2101_set_config
+ * Writes to the CP2101 configuration registers
+ * Values less than 16 bits wide are sent directly
+ * 'size' is specified in bytes.
+ */
+static int cp2101_set_config(struct usb_serial_port *port, u8 request,
+ unsigned int *data, int size)
+{
+ struct usb_serial *serial = port->serial;
+ __le32 *buf;
+ int result, i, length;
+
+ /* Number of integers required to contain the array */
+ length = (((size - 1) | 3) + 1)/4;
+
+ buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
+ if (!buf) {
+ dev_err(&port->dev, "%s - out of memory.\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ /* Array of integers into bytes */
+ for (i = 0; i < length; i++)
+ buf[i] = cpu_to_le32(data[i]);
+
+ if (size > 2) {
+ result = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ request, REQTYPE_HOST_TO_DEVICE, 0x0000,
+ 0, buf, size, 300);
+ } else {
+ result = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ request, REQTYPE_HOST_TO_DEVICE, data[0],
+ 0, NULL, 0, 300);
+ }
+
+ kfree(buf);
+
+ if ((size > 2 && result != size) || result < 0) {
+ dbg("%s - Unable to send request, "
+ "request=0x%x size=%d result=%d\n",
+ __func__, request, size, result);
+ return -EPROTO;
+ }
+
+ /* Single data value */
+ result = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ request, REQTYPE_HOST_TO_DEVICE, data[0],
+ 0, NULL, 0, 300);
+ return 0;
+}
+
+/*
+ * cp2101_set_config_single
+ * Convenience function for calling cp2101_set_config on single data values
+ * without requiring an integer pointer
+ */
+static inline int cp2101_set_config_single(struct usb_serial_port *port,
+ u8 request, unsigned int data)
+{
+ return cp2101_set_config(port, request, &data, 2);
+}
+
+/*
+ * cp2101_quantise_baudrate
+ * Quantises the baud rate as per AN205 Table 1
+ */
+static unsigned int cp2101_quantise_baudrate(unsigned int baud) {
+ if (baud <= 56) baud = 0;
+ else if (baud <= 300) baud = 300;
+ else if (baud <= 600) baud = 600;
+ else if (baud <= 1200) baud = 1200;
+ else if (baud <= 1800) baud = 1800;
+ else if (baud <= 2400) baud = 2400;
+ else if (baud <= 4000) baud = 4000;
+ else if (baud <= 4803) baud = 4800;
+ else if (baud <= 7207) baud = 7200;
+ else if (baud <= 9612) baud = 9600;
+ else if (baud <= 14428) baud = 14400;
+ else if (baud <= 16062) baud = 16000;
+ else if (baud <= 19250) baud = 19200;
+ else if (baud <= 28912) baud = 28800;
+ else if (baud <= 38601) baud = 38400;
+ else if (baud <= 51558) baud = 51200;
+ else if (baud <= 56280) baud = 56000;
+ else if (baud <= 58053) baud = 57600;
+ else if (baud <= 64111) baud = 64000;
+ else if (baud <= 77608) baud = 76800;
+ else if (baud <= 117028) baud = 115200;
+ else if (baud <= 129347) baud = 128000;
+ else if (baud <= 156868) baud = 153600;
+ else if (baud <= 237832) baud = 230400;
+ else if (baud <= 254234) baud = 250000;
+ else if (baud <= 273066) baud = 256000;
+ else if (baud <= 491520) baud = 460800;
+ else if (baud <= 567138) baud = 500000;
+ else if (baud <= 670254) baud = 576000;
+ else if (baud <= 1053257) baud = 921600;
+ else if (baud <= 1474560) baud = 1228800;
+ else if (baud <= 2457600) baud = 1843200;
+ else baud = 3686400;
+ return baud;
+}
+
+static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
+{
+ struct usb_serial *serial = port->serial;
+ int result;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
+ dev_err(&port->dev, "%s - Unable to enable UART\n",
+ __func__);
+ return -EPROTO;
+ }
+
+ /* Start reading from the device */
+ usb_fill_bulk_urb(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->transfer_buffer_length,
+ serial->type->read_bulk_callback,
+ port);
+ result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev, "%s - failed resubmitting read urb, "
+ "error %d\n", __func__, result);
+ return result;
+ }
+
+ /* Configure the termios structure */
+ cp2101_get_termios(tty, port);
+
+ /* Set the DTR and RTS pins low */
+ cp2101_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data
+ : port,
+ NULL, TIOCM_DTR | TIOCM_RTS, 0);
+
+ return 0;
+}
+
+static void cp2101_cleanup(struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (serial->dev) {
+ /* shutdown any bulk reads that might be going on */
+ if (serial->num_bulk_out)
+ usb_kill_urb(port->write_urb);
+ if (serial->num_bulk_in)
+ usb_kill_urb(port->read_urb);
+ }
+}
+
+static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
+{
+ dbg("%s - port %d", __func__, port->number);
+
+ /* shutdown our urbs */
+ dbg("%s - shutting down urbs", __func__);
+ usb_kill_urb(port->write_urb);
+ usb_kill_urb(port->read_urb);
+
+ mutex_lock(&port->serial->disc_mutex);
+ if (!port->serial->disconnected)
+ cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
+ mutex_unlock(&port->serial->disc_mutex);
+}
+
+/*
+ * cp2101_get_termios
+ * Reads the baud rate, data bits, parity, stop bits and flow control mode
+ * from the device, corrects any unsupported values, and configures the
+ * termios structure to reflect the state of the device
+ */
+static void cp2101_get_termios(struct tty_struct *tty,
+ struct usb_serial_port *port)
+{
+ unsigned int baud;
+
+ if (tty) {
+ cp2101_get_termios_port(tty->driver_data,
+ &tty->termios->c_cflag, &baud);
+ tty_encode_baud_rate(tty, baud, baud);
+ }
+
+ else {
+ unsigned int cflag;
+ cflag = 0;
+ cp2101_get_termios_port(port, &cflag, &baud);
+ }
+}
+
+/*
+ * cp2101_get_termios_port
+ * This is the heart of cp2101_get_termios which always uses a &usb_serial_port.
+ */
+static void cp2101_get_termios_port(struct usb_serial_port *port,
+ unsigned int *cflagp, unsigned int *baudp)
+{
+ unsigned int cflag, modem_ctl[4];
+ unsigned int baud;
+ unsigned int bits;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
+ /* Convert to baudrate */
+ if (baud)
+ baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
+
+ dbg("%s - baud rate = %d", __func__, baud);
+ *baudp = baud;
+
+ cflag = *cflagp;
+
+ cp2101_get_config(port, CP2101_BITS, &bits, 2);
+ cflag &= ~CSIZE;
+ switch (bits & BITS_DATA_MASK) {
+ case BITS_DATA_5:
+ dbg("%s - data bits = 5", __func__);
+ cflag |= CS5;
+ break;
+ case BITS_DATA_6:
+ dbg("%s - data bits = 6", __func__);
+ cflag |= CS6;
+ break;
+ case BITS_DATA_7:
+ dbg("%s - data bits = 7", __func__);
+ cflag |= CS7;
+ break;
+ case BITS_DATA_8:
+ dbg("%s - data bits = 8", __func__);
+ cflag |= CS8;
+ break;
+ case BITS_DATA_9:
+ dbg("%s - data bits = 9 (not supported, using 8 data bits)",
+ __func__);
+ cflag |= CS8;
+ bits &= ~BITS_DATA_MASK;
+ bits |= BITS_DATA_8;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ default:
+ dbg("%s - Unknown number of data bits, using 8", __func__);
+ cflag |= CS8;
+ bits &= ~BITS_DATA_MASK;
+ bits |= BITS_DATA_8;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ }
+
+ switch (bits & BITS_PARITY_MASK) {
+ case BITS_PARITY_NONE:
+ dbg("%s - parity = NONE", __func__);
+ cflag &= ~PARENB;
+ break;
+ case BITS_PARITY_ODD:
+ dbg("%s - parity = ODD", __func__);
+ cflag |= (PARENB|PARODD);
+ break;
+ case BITS_PARITY_EVEN:
+ dbg("%s - parity = EVEN", __func__);
+ cflag &= ~PARODD;
+ cflag |= PARENB;
+ break;
+ case BITS_PARITY_MARK:
+ dbg("%s - parity = MARK (not supported, disabling parity)",
+ __func__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ case BITS_PARITY_SPACE:
+ dbg("%s - parity = SPACE (not supported, disabling parity)",
+ __func__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ default:
+ dbg("%s - Unknown parity mode, disabling parity", __func__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ }
+
+ cflag &= ~CSTOPB;
+ switch (bits & BITS_STOP_MASK) {
+ case BITS_STOP_1:
+ dbg("%s - stop bits = 1", __func__);
+ break;
+ case BITS_STOP_1_5:
+ dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
+ __func__);
+ bits &= ~BITS_STOP_MASK;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ case BITS_STOP_2:
+ dbg("%s - stop bits = 2", __func__);
+ cflag |= CSTOPB;
+ break;
+ default:
+ dbg("%s - Unknown number of stop bits, using 1 stop bit",
+ __func__);
+ bits &= ~BITS_STOP_MASK;
+ cp2101_set_config(port, CP2101_BITS, &bits, 2);
+ break;
+ }
+
+ cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+ if (modem_ctl[0] & 0x0008) {
+ dbg("%s - flow control = CRTSCTS", __func__);
+ cflag |= CRTSCTS;
+ } else {
+ dbg("%s - flow control = NONE", __func__);
+ cflag &= ~CRTSCTS;
+ }
+
+ *cflagp = cflag;
+}
+
+static void cp2101_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port, struct ktermios *old_termios)
+{
+ unsigned int cflag, old_cflag;
+ unsigned int baud = 0, bits;
+ unsigned int modem_ctl[4];
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (!tty)
+ return;
+
+ tty->termios->c_cflag &= ~CMSPAR;
+ cflag = tty->termios->c_cflag;
+ old_cflag = old_termios->c_cflag;
+ baud = cp2101_quantise_baudrate(tty_get_baud_rate(tty));
+
+ /* If the baud rate is to be updated*/
+ if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
+ dbg("%s - Setting baud rate to %d baud", __func__,
+ baud);
+ if (cp2101_set_config_single(port, CP2101_BAUDRATE,
+ ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
+ dbg("Baud rate requested not supported by device\n");
+ baud = tty_termios_baud_rate(old_termios);
+ }
+ }
+ /* Report back the resulting baud rate */
+ tty_encode_baud_rate(tty, baud, baud);
+
+ /* If the number of data bits is to be updated */
+ if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
+ cp2101_get_config(port, CP2101_BITS, &bits, 2);
+ bits &= ~BITS_DATA_MASK;
+ switch (cflag & CSIZE) {
+ case CS5:
+ bits |= BITS_DATA_5;
+ dbg("%s - data bits = 5", __func__);
+ break;
+ case CS6:
+ bits |= BITS_DATA_6;
+ dbg("%s - data bits = 6", __func__);
+ break;
+ case CS7:
+ bits |= BITS_DATA_7;
+ dbg("%s - data bits = 7", __func__);
+ break;
+ case CS8:
+ bits |= BITS_DATA_8;
+ dbg("%s - data bits = 8", __func__);
+ break;
+ /*case CS9:
+ bits |= BITS_DATA_9;
+ dbg("%s - data bits = 9", __func__);
+ break;*/
+ default:
+ dbg("cp2101 driver does not "
+ "support the number of bits requested,"
+ " using 8 bit mode\n");
+ bits |= BITS_DATA_8;
+ break;
+ }
+ if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+ dbg("Number of data bits requested "
+ "not supported by device\n");
+ }
+
+ if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
+ cp2101_get_config(port, CP2101_BITS, &bits, 2);
+ bits &= ~BITS_PARITY_MASK;
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ bits |= BITS_PARITY_ODD;
+ dbg("%s - parity = ODD", __func__);
+ } else {
+ bits |= BITS_PARITY_EVEN;
+ dbg("%s - parity = EVEN", __func__);
+ }
+ }
+ if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+ dbg("Parity mode not supported "
+ "by device\n");
+ }
+
+ if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
+ cp2101_get_config(port, CP2101_BITS, &bits, 2);
+ bits &= ~BITS_STOP_MASK;
+ if (cflag & CSTOPB) {
+ bits |= BITS_STOP_2;
+ dbg("%s - stop bits = 2", __func__);
+ } else {
+ bits |= BITS_STOP_1;
+ dbg("%s - stop bits = 1", __func__);
+ }
+ if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+ dbg("Number of stop bits requested "
+ "not supported by device\n");
+ }
+
+ if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
+ cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+ dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
+ __func__, modem_ctl[0], modem_ctl[1],
+ modem_ctl[2], modem_ctl[3]);
+
+ if (cflag & CRTSCTS) {
+ modem_ctl[0] &= ~0x7B;
+ modem_ctl[0] |= 0x09;
+ modem_ctl[1] = 0x80;
+ dbg("%s - flow control = CRTSCTS", __func__);
+ } else {
+ modem_ctl[0] &= ~0x7B;
+ modem_ctl[0] |= 0x01;
+ modem_ctl[1] |= 0x40;
+ dbg("%s - flow control = NONE", __func__);
+ }
+
+ dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
+ __func__, modem_ctl[0], modem_ctl[1],
+ modem_ctl[2], modem_ctl[3]);
+ cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+ }
+
+}
+
+static int cp2101_tiocmset (struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ return cp2101_tiocmset_port(port, file, set, clear);
+}
+
+static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ unsigned int control = 0;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (set & TIOCM_RTS) {
+ control |= CONTROL_RTS;
+ control |= CONTROL_WRITE_RTS;
+ }
+ if (set & TIOCM_DTR) {
+ control |= CONTROL_DTR;
+ control |= CONTROL_WRITE_DTR;
+ }
+ if (clear & TIOCM_RTS) {
+ control &= ~CONTROL_RTS;
+ control |= CONTROL_WRITE_RTS;
+ }
+ if (clear & TIOCM_DTR) {
+ control &= ~CONTROL_DTR;
+ control |= CONTROL_WRITE_DTR;
+ }
+
+ dbg("%s - control = 0x%.4x", __func__, control);
+
+ return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
+}
+
+static int cp2101_tiocmget (struct tty_struct *tty, struct file *file)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ unsigned int control;
+ int result;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ cp2101_get_config(port, CP2101_CONTROL, &control, 1);
+
+ result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
+ |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
+ |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
+ |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
+ |((control & CONTROL_RING)? TIOCM_RI : 0)
+ |((control & CONTROL_DCD) ? TIOCM_CD : 0);
+
+ dbg("%s - control = 0x%.2x", __func__, control);
+
+ return result;
+}
+
+static void cp2101_break_ctl (struct tty_struct *tty, int break_state)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ unsigned int state;
+
+ dbg("%s - port %d", __func__, port->number);
+ if (break_state == 0)
+ state = BREAK_OFF;
+ else
+ state = BREAK_ON;
+ dbg("%s - turning break %s", __func__,
+ state == BREAK_OFF ? "off" : "on");
+ cp2101_set_config(port, CP2101_BREAK, &state, 2);
+}
+
+static int cp2101_startup(struct usb_serial *serial)
+{
+ /* CP2101 buffers behave strangely unless device is reset */
+ usb_reset_device(serial->dev);
+ return 0;
+}
+
+static void cp2101_shutdown(struct usb_serial *serial)
+{
+ int i;
+
+ dbg("%s", __func__);
+
+ /* Stop reads and writes on all ports */
+ for (i = 0; i < serial->num_ports; ++i)
+ cp2101_cleanup(serial->port[i]);
+}
+
+static int __init cp2101_init(void)
+{
+ int retval;
+
+ retval = usb_serial_register(&cp2101_device);
+ if (retval)
+ return retval; /* Failed to register */
+
+ retval = usb_register(&cp2101_driver);
+ if (retval) {
+ /* Failed to register */
+ usb_serial_deregister(&cp2101_device);
+ return retval;
+ }
+
+ /* Success */
+ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+ DRIVER_DESC "\n");
+ return 0;
+}
+
+static void __exit cp2101_exit(void)
+{
+ usb_deregister(&cp2101_driver);
+ usb_serial_deregister(&cp2101_device);
+}
+
+module_init(cp2101_init);
+module_exit(cp2101_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 16:00:13 +0000