Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/serial/cp2101.c b/drivers/usb/serial/cp2101.c
new file mode 100644
index 0000000..7e9bb63
--- /dev/null
+++ b/drivers/usb/serial/cp2101.c
@@ -0,0 +1,591 @@
+/*
+ * 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.
+ *
+ */
+
+#include <linux/config.h>
+#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 <asm/uaccess.h>
+#include "usb-serial.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.03"
+#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
+
+/*
+ * Function Prototypes
+ */
+static int cp2101_open(struct usb_serial_port*, struct file*);
+static void cp2101_cleanup(struct usb_serial_port*);
+static void cp2101_close(struct usb_serial_port*, struct file*);
+static void cp2101_get_termios(struct usb_serial_port*);
+static void cp2101_set_termios(struct usb_serial_port*, struct termios*);
+static void cp2101_break_ctl(struct usb_serial_port*, 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(0x10c4, 0xea60) }, /*Silicon labs factory default*/
+ {USB_DEVICE(0x10ab, 0x10c5) }, /*Siemens MC60 Cable*/
+ { } /* Terminating Entry*/
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static struct usb_driver cp2101_driver = {
+ .owner = THIS_MODULE,
+ .name = "CP2101",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+};
+
+static struct usb_serial_device_type cp2101_device = {
+ .owner = THIS_MODULE,
+ .name = "CP2101",
+ .id_table = id_table,
+ .num_interrupt_in = 0,
+ .num_bulk_in = 0,
+ .num_bulk_out = 0,
+ .num_ports = 1,
+ .open = cp2101_open,
+ .close = cp2101_close,
+ .break_ctl = cp2101_break_ctl,
+ .set_termios = cp2101_set_termios,
+ .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)(data bits)(parity)(stop bits)*/
+#define CP2101_BREAK 0x05 /*On / Off*/
+#define CP2101_DTRRTS 0x07 /*101 / 202 ???*/
+#define CP2101_CONFIG_16 0x13 /*16 bytes of config data ???*/
+#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_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
+#define BREAK_ON 0x0000
+#define BREAK_OFF 0x0001
+
+
+static int cp2101_get_config(struct usb_serial_port* port, u8 request)
+{
+ struct usb_serial *serial = port->serial;
+ unsigned char buf[4];
+ unsigned int value;
+ int result, i;
+
+ /*For get requests, the request number must be incremented*/
+ request++;
+
+ /*Issue the request, attempting to read 4 bytes*/
+ result = usb_control_msg (serial->dev,usb_rcvctrlpipe (serial->dev, 0),
+ request, REQTYPE_DEVICE_TO_HOST, 0x0000,
+ 0, buf, 4, 300);
+
+ if (result < 0) {
+ dev_err(&port->dev, "%s - Unable to send config request, "
+ "request=0x%x result=%d\n",
+ __FUNCTION__, request, result);
+ return result;
+ }
+
+ /*Assemble each byte read into an integer value*/
+ value = 0;
+ for (i=0; i<4 && i<result; i++)
+ value |= (buf[i] << (i * 8));
+
+ dbg( " %s - request=0x%x result=%d value=0x%x",
+ __FUNCTION__, request, result, value);
+
+ return value;
+}
+
+static int cp2101_set_config(struct usb_serial_port* port, u8 request, u16 value)
+{
+ struct usb_serial *serial = port->serial;
+ int result;
+ result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ request, REQTYPE_HOST_TO_DEVICE, value,
+ 0, NULL, 0, 300);
+
+ if (result <0) {
+ dev_err(&port->dev, "%s - Unable to send config request, "
+ "request=0x%x value=0x%x result=%d\n",
+ __FUNCTION__, request, value, result);
+ return result;
+ }
+
+ dbg(" %s - request=0x%x value=0x%x result=%d",
+ __FUNCTION__, request, value, result);
+
+ return 0;
+}
+
+static int cp2101_open (struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial = port->serial;
+ int result;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (cp2101_set_config(port, CP2101_UART, UART_ENABLE)) {
+ dev_err(&port->dev, "%s - Unable to enable UART\n",
+ __FUNCTION__);
+ 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", __FUNCTION__, result);
+ return result;
+ }
+
+ /*Configure the termios structure*/
+ cp2101_get_termios(port);
+
+ return 0;
+}
+
+static void cp2101_cleanup (struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+
+ dbg("%s - port %d", __FUNCTION__, 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 usb_serial_port *port, struct file * filp)
+{
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ /* shutdown our urbs */
+ dbg("%s - shutting down urbs", __FUNCTION__);
+ usb_kill_urb(port->write_urb);
+ usb_kill_urb(port->read_urb);
+
+ cp2101_set_config(port, CP2101_UART, UART_DISABLE);
+}
+
+/* cp2101_get_termios*/
+/* Reads the baud rate, data bits, parity and stop bits from the device*/
+/* Corrects any unsupported values*/
+/* Configures the termios structure to reflect the state of the device*/
+static void cp2101_get_termios (struct usb_serial_port *port)
+{
+ unsigned int cflag;
+ int baud;
+ int bits;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if ((!port->tty) || (!port->tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+ cflag = port->tty->termios->c_cflag;
+
+ baud = cp2101_get_config(port, CP2101_BAUDRATE);
+ /*Convert to baudrate*/
+ if (baud)
+ baud = BAUD_RATE_GEN_FREQ / baud;
+
+ dbg("%s - baud rate = %d", __FUNCTION__, baud);
+ cflag &= ~CBAUD;
+ switch (baud) {
+ /* The baud rates which are commented out below
+ * appear to be supported by the device
+ * but are non-standard
+ */
+ case 600: cflag |= B600; break;
+ case 1200: cflag |= B1200; break;
+ case 1800: cflag |= B1800; break;
+ case 2400: cflag |= B2400; break;
+ case 4800: cflag |= B4800; break;
+ /*case 7200: cflag |= B7200; break;*/
+ case 9600: cflag |= B9600; break;
+ /*case 14400: cflag |= B14400; break;*/
+ case 19200: cflag |= B19200; break;
+ /*case 28800: cflag |= B28800; break;*/
+ case 38400: cflag |= B38400; break;
+ /*case 55854: cflag |= B55054; break;*/
+ case 57600: cflag |= B57600; break;
+ case 115200: cflag |= B115200; break;
+ /*case 127117: cflag |= B127117; break;*/
+ case 230400: cflag |= B230400; break;
+ case 460800: cflag |= B460800; break;
+ case 921600: cflag |= B921600; break;
+ /*case 3686400: cflag |= B3686400; break;*/
+ default:
+ dbg("%s - Baud rate is not supported, "
+ "using 9600 baud", __FUNCTION__);
+ cflag |= B9600;
+ cp2101_set_config(port, CP2101_BAUDRATE,
+ (BAUD_RATE_GEN_FREQ/9600));
+ break;
+ }
+
+ bits = cp2101_get_config(port, CP2101_BITS);
+ cflag &= ~CSIZE;
+ switch(bits & BITS_DATA_MASK) {
+ case BITS_DATA_6:
+ dbg("%s - data bits = 6", __FUNCTION__);
+ cflag |= CS6;
+ break;
+ case BITS_DATA_7:
+ dbg("%s - data bits = 7", __FUNCTION__);
+ cflag |= CS7;
+ break;
+ case BITS_DATA_8:
+ dbg("%s - data bits = 8", __FUNCTION__);
+ cflag |= CS8;
+ break;
+ case BITS_DATA_9:
+ dbg("%s - data bits = 9 (not supported, "
+ "using 8 data bits)", __FUNCTION__);
+ cflag |= CS8;
+ bits &= ~BITS_DATA_MASK;
+ bits |= BITS_DATA_8;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ default:
+ dbg("%s - Unknown number of data bits, "
+ "using 8", __FUNCTION__);
+ cflag |= CS8;
+ bits &= ~BITS_DATA_MASK;
+ bits |= BITS_DATA_8;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ }
+
+ switch(bits & BITS_PARITY_MASK) {
+ case BITS_PARITY_NONE:
+ dbg("%s - parity = NONE", __FUNCTION__);
+ cflag &= ~PARENB;
+ break;
+ case BITS_PARITY_ODD:
+ dbg("%s - parity = ODD", __FUNCTION__);
+ cflag |= (PARENB|PARODD);
+ break;
+ case BITS_PARITY_EVEN:
+ dbg("%s - parity = EVEN", __FUNCTION__);
+ cflag &= ~PARODD;
+ cflag |= PARENB;
+ break;
+ case BITS_PARITY_MARK:
+ dbg("%s - parity = MARK (not supported, "
+ "disabling parity)", __FUNCTION__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ case BITS_PARITY_SPACE:
+ dbg("%s - parity = SPACE (not supported, "
+ "disabling parity)", __FUNCTION__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ default:
+ dbg("%s - Unknown parity mode, "
+ "disabling parity", __FUNCTION__);
+ cflag &= ~PARENB;
+ bits &= ~BITS_PARITY_MASK;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ }
+
+ cflag &= ~CSTOPB;
+ switch(bits & BITS_STOP_MASK) {
+ case BITS_STOP_1:
+ dbg("%s - stop bits = 1", __FUNCTION__);
+ break;
+ case BITS_STOP_1_5:
+ dbg("%s - stop bits = 1.5 (not supported, "
+ "using 1 stop bit", __FUNCTION__);
+ bits &= ~BITS_STOP_MASK;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ case BITS_STOP_2:
+ dbg("%s - stop bits = 2", __FUNCTION__);
+ cflag |= CSTOPB;
+ break;
+ default:
+ dbg("%s - Unknown number of stop bits, "
+ "using 1 stop bit", __FUNCTION__);
+ bits &= ~BITS_STOP_MASK;
+ cp2101_set_config(port, CP2101_BITS, bits);
+ break;
+ }
+
+ port->tty->termios->c_cflag = cflag;
+}
+
+static void cp2101_set_termios (struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ unsigned int cflag, old_cflag=0;
+ int baud=0;
+ int bits;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if ((!port->tty) || (!port->tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+ cflag = port->tty->termios->c_cflag;
+
+ /* check that they really want us to change something */
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(port->tty->termios->c_iflag)
+ == RELEVANT_IFLAG(old_termios->c_iflag))) {
+ dbg("%s - nothing to change...", __FUNCTION__);
+ return;
+ }
+
+ old_cflag = old_termios->c_cflag;
+ }
+
+ /* If the baud rate is to be updated*/
+ if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
+ switch (cflag & CBAUD) {
+ /* The baud rates which are commented out below
+ * appear to be supported by the device
+ * but are non-standard
+ */
+ case B0: baud = 0; break;
+ case B600: baud = 600; break;
+ case B1200: baud = 1200; break;
+ case B1800: baud = 1800; break;
+ case B2400: baud = 2400; break;
+ case B4800: baud = 4800; break;
+ /*case B7200: baud = 7200; break;*/
+ case B9600: baud = 9600; break;
+ /*ase B14400: baud = 14400; break;*/
+ case B19200: baud = 19200; break;
+ /*case B28800: baud = 28800; break;*/
+ case B38400: baud = 38400; break;
+ /*case B55854: baud = 55054; break;*/
+ case B57600: baud = 57600; break;
+ case B115200: baud = 115200; break;
+ /*case B127117: baud = 127117; break;*/
+ case B230400: baud = 230400; break;
+ case B460800: baud = 460800; break;
+ case B921600: baud = 921600; break;
+ /*case B3686400: baud = 3686400; break;*/
+ default:
+ dev_err(&port->dev, "cp2101 driver does not "
+ "support the baudrate requested\n");
+ break;
+ }
+
+ if (baud) {
+ dbg("%s - Setting baud rate to %d baud", __FUNCTION__,
+ baud);
+ if (cp2101_set_config(port, CP2101_BAUDRATE,
+ (BAUD_RATE_GEN_FREQ / baud)))
+ dev_err(&port->dev, "Baud rate requested not "
+ "supported by device\n");
+ }
+ }
+
+ /*If the number of data bits is to be updated*/
+ if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
+ bits = cp2101_get_config(port, CP2101_BITS);
+ bits &= ~BITS_DATA_MASK;
+ switch (cflag & CSIZE) {
+ case CS6:
+ bits |= BITS_DATA_6;
+ dbg("%s - data bits = 6", __FUNCTION__);
+ break;
+ case CS7:
+ bits |= BITS_DATA_7;
+ dbg("%s - data bits = 7", __FUNCTION__);
+ break;
+ case CS8:
+ bits |= BITS_DATA_8;
+ dbg("%s - data bits = 8", __FUNCTION__);
+ break;
+ /*case CS9:
+ bits |= BITS_DATA_9;
+ dbg("%s - data bits = 9", __FUNCTION__);
+ break;*/
+ default:
+ dev_err(&port->dev, "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))
+ dev_err(&port->dev, "Number of data bits requested "
+ "not supported by device\n");
+ }
+
+ if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
+ bits = cp2101_get_config(port, CP2101_BITS);
+ bits &= ~BITS_PARITY_MASK;
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ bits |= BITS_PARITY_ODD;
+ dbg("%s - parity = ODD", __FUNCTION__);
+ } else {
+ bits |= BITS_PARITY_EVEN;
+ dbg("%s - parity = EVEN", __FUNCTION__);
+ }
+ }
+ if (cp2101_set_config(port, CP2101_BITS, bits))
+ dev_err(&port->dev, "Parity mode not supported "
+ "by device\n");
+ }
+
+ if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
+ bits = cp2101_get_config(port, CP2101_BITS);
+ bits &= ~BITS_STOP_MASK;
+ if (cflag & CSTOPB) {
+ bits |= BITS_STOP_2;
+ dbg("%s - stop bits = 2", __FUNCTION__);
+ } else {
+ bits |= BITS_STOP_1;
+ dbg("%s - stop bits = 1", __FUNCTION__);
+ }
+ if (cp2101_set_config(port, CP2101_BITS, bits))
+ dev_err(&port->dev, "Number of stop bits requested "
+ "not supported by device\n");
+ }
+}
+
+static void cp2101_break_ctl (struct usb_serial_port *port, int break_state)
+{
+ u16 state;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+ if (break_state == 0)
+ state = BREAK_OFF;
+ else
+ state = BREAK_ON;
+ dbg("%s - turning break %s", __FUNCTION__,
+ state==BREAK_OFF ? "off" : "on");
+ cp2101_set_config(port, CP2101_BREAK, state);
+}
+
+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", __FUNCTION__);
+
+ /* 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*/
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ 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");