Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755485AbYB2J0B (ORCPT ); Fri, 29 Feb 2008 04:26:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750735AbYB2JZo (ORCPT ); Fri, 29 Feb 2008 04:25:44 -0500 Received: from parabel.levigo.net ([62.206.214.16]:46083 "EHLO parabel.matrix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750695AbYB2JZj (ORCPT ); Fri, 29 Feb 2008 04:25:39 -0500 X-Greylist: delayed 1381 seconds by postgrey-1.27 at vger.kernel.org; Fri, 29 Feb 2008 04:25:38 EST Message-ID: <47C7CA1A.3080001@gdsys.de> Date: Fri, 29 Feb 2008 10:02:18 +0100 From: Dirk Eibach User-Agent: Mozilla-Thunderbird 2.0.0.9 (X11/20080110) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Cc: greg@kroah.com Subject: [PATCH] usb: add sysfs configuration interface for CP2101 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-AntiVirus: checked by AntiVir MailGate (version: 2.0.2-5; AVE: 7.6.0.67; VDF: 7.0.2.210; host: mailrelay) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 32834 Lines: 1127 From: Dirk Eibach The usb configuration data for the Silabs CP2101 usb to uart bridge controller can be customized: - Vendor ID - Product ID - Power Descriptor - Release Number - Serial Number - Product Description String Silabs provides a windows-only tool to do that. Since we use linux-only machines in our production-environment, we have no proper way to customize the chips for our purpose. So I added sysfs configuration support to the linux driver. Signed-off-by: Dirk Eibach --- diff -purN linux-2.6.24/drivers/usb/serial/cp2101.c linux-2.6.24-diff/drivers/usb/serial/cp2101.c --- linux-2.6.24/drivers/usb/serial/cp2101.c 2008-01-24 23:58:37.000000000 +0100 +++ linux-2.6.24-diff/drivers/usb/serial/cp2101.c 2008-02-29 09:38:30.847817025 +0100 @@ -18,6 +18,8 @@ */ #include +#include +#include #include #include #include @@ -52,6 +54,8 @@ static void cp2101_shutdown(struct usb_s static int debug; +bool enable_config = false; + static struct usb_device_id id_table [] = { { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ @@ -125,6 +129,7 @@ static struct usb_serial_driver cp2101_d #define CP2101_CONTROL 0x07 /* Flow control line states */ #define CP2101_MODEMCTL 0x13 /* Modem controls */ #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ +#define CP2101_EEPROM 0xFF /* write configuration eeprom */ /* CP2101_UART */ #define UART_ENABLE 0x0001 @@ -167,6 +172,17 @@ static struct usb_serial_driver cp2101_d #define CONTROL_WRITE_DTR 0x0100 #define CONTROL_WRITE_RTS 0x0200 +/* CP2101 CONFIGURATION EEPROM */ +#define EEPROM_RELOAD 0x0008 +#define EEPROM_VID 0x3701 +#define EEPROM_PID 0x3702 +#define EEPROM_PRODUCTSTRING 0x3703 +#define EEPROM_SERIALNUMBER 0x3704 +#define EEPROM_POWER_ATTRIB 0x3705 +#define EEPROM_MAX_POWER 0x3706 +#define EEPROM_RELEASE_VERSION 0x3707 +#define EEPROM_LOCK 0x370a + /* * cp2101_get_config * Reads from the CP2101 configuration registers @@ -704,11 +720,262 @@ static void cp2101_break_ctl (struct usb cp2101_set_config(port, CP2101_BREAK, &state, 2); } +static ssize_t write_reload(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + /* writing "0" does not trigger */ + if (!simple_strtoul(buf, NULL, 0)) + return count; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_RELOAD, + 0, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(reload, S_IWUGO, NULL, write_reload); + +static ssize_t write_vid(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long vid = simple_strtoul(buf, NULL, 0); + + if (!vid || vid > 0xffff) + return -EINVAL; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_VID, + vid, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(vid, S_IWUGO, NULL, write_vid); + +static ssize_t write_pid(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long pid = simple_strtoul(buf, NULL, 0); + + if (!pid || pid > 0xffff) + return -EINVAL; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_PID, + pid, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(pid, S_IWUGO, NULL, write_pid); + +static ssize_t write_serialnumber(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + int result; + unsigned int k; + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + u8 serial_stringsize = 2 + 2*count; + char serial[serial_stringsize]; + + if (count > 63) + return -EINVAL; + + serial[0] = serial_stringsize; + serial[1] = USB_DT_STRING; + + /* convert to utf-16 */ + for (k = 0; k < count; ++k) { + serial[2+2*k] = buf[k]; + serial[2+2*k+1] = 0; + } + + result = usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_SERIALNUMBER, + 0, serial, sizeof(serial), 300); + + if (result != serial_stringsize) + return -EIO; + + return count; +} + +static DEVICE_ATTR(serialnumber, S_IWUGO, NULL, write_serialnumber); + + +static ssize_t write_productstring(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + int result; + unsigned int k; + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + u8 product_stringsize = 2 + 2*count; + char product[product_stringsize]; + + if (count > 126) + return -EINVAL; + + product[0] = product_stringsize; + product[1] = USB_DT_STRING; + + /* convert to utf-16 */ + for (k = 0; k < count; ++k) { + product[2+2*k] = buf[k]; + product[2+2*k+1] = 0; + } + + result = usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, + EEPROM_PRODUCTSTRING, 0, + product, sizeof(product), 300); + + if (result != product_stringsize) + return -EIO; + + return count; +} + +static DEVICE_ATTR(productstring, S_IWUGO, NULL, write_productstring); + +static ssize_t write_self_powered(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long self_powered = simple_strtoul(buf, NULL, 0); + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_POWER_ATTRIB, + self_powered ? 0x00c0 : 0x0080, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(self_powered, S_IWUGO, NULL, write_self_powered); + +static ssize_t write_max_power(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long max_power = simple_strtoul(buf, NULL, 0); + + if (!max_power || max_power > 0xff) + return -EINVAL; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_MAX_POWER, + max_power, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(max_power, S_IWUGO, NULL, write_max_power); + +static ssize_t write_release_version(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long release_version = simple_strtoul(buf, NULL, 0); + + if (release_version > 0xffff) + return -EINVAL; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_RELEASE_VERSION, + release_version, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(release_version, S_IWUGO, NULL, write_release_version); + +static ssize_t write_lock_forever(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_device *usbdev = container_of(dev, struct usb_device, dev); + + unsigned long lock = simple_strtoul(buf, NULL, 0); + + /* be really, really sure to know what you are doing here */ + if (lock != 0xabadbabe) + return -EINVAL; + + usb_control_msg(usbdev, + usb_sndctrlpipe(usbdev, 0), + CP2101_EEPROM, REQTYPE_HOST_TO_DEVICE, EEPROM_LOCK, + 0x00f0, NULL, 0, 300); + + return count; +} + +static DEVICE_ATTR(lock_forever, S_IWUGO, NULL, write_lock_forever); + static int cp2101_startup (struct usb_serial *serial) { + int err; + /* CP2101 buffers behave strangely unless device is reset */ usb_reset_device(serial->dev); + + if (!enable_config) + return 0; + + err = device_create_file(&serial->dev->dev, &dev_attr_reload); + if (err) goto out; + err = device_create_file(&serial->dev->dev, &dev_attr_vid); + if (err) goto out_reload; + err = device_create_file(&serial->dev->dev, &dev_attr_pid); + if (err) goto out_vid; + err = device_create_file(&serial->dev->dev, &dev_attr_productstring); + if (err) goto out_pid; + err = device_create_file(&serial->dev->dev, &dev_attr_serialnumber); + if (err) goto out_productstring; + err = device_create_file(&serial->dev->dev, &dev_attr_self_powered); + if (err) goto out_serialnumber; + err = device_create_file(&serial->dev->dev, &dev_attr_max_power); + if (err) goto out_self_powered; + err = device_create_file(&serial->dev->dev, &dev_attr_release_version); + if (err) goto out_max_power; + err = device_create_file(&serial->dev->dev, &dev_attr_lock_forever); + if (err) goto out_release_version; + return 0; + +out_release_version: + device_remove_file(&serial->dev->dev, &dev_attr_release_version); +out_max_power: + device_remove_file(&serial->dev->dev, &dev_attr_max_power); +out_self_powered: + device_remove_file(&serial->dev->dev, &dev_attr_self_powered); +out_serialnumber: + device_remove_file(&serial->dev->dev, &dev_attr_serialnumber); +out_productstring: + device_remove_file(&serial->dev->dev, &dev_attr_productstring); +out_pid: + device_remove_file(&serial->dev->dev, &dev_attr_pid); +out_vid: + device_remove_file(&serial->dev->dev, &dev_attr_vid); +out_reload: + device_remove_file(&serial->dev->dev, &dev_attr_reload); +out: + return err; } static void cp2101_shutdown (struct usb_serial *serial) @@ -721,6 +988,19 @@ static void cp2101_shutdown (struct usb_ for (i=0; i < serial->num_ports; ++i) { cp2101_cleanup(serial->port[i]); } + + if (!enable_config) + return; + + device_remove_file(&serial->dev->dev, &dev_attr_reload); + device_remove_file(&serial->dev->dev, &dev_attr_vid); + device_remove_file(&serial->dev->dev, &dev_attr_pid); + device_remove_file(&serial->dev->dev, &dev_attr_productstring); + device_remove_file(&serial->dev->dev, &dev_attr_serialnumber); + device_remove_file(&serial->dev->dev, &dev_attr_self_powered); + device_remove_file(&serial->dev->dev, &dev_attr_max_power); + device_remove_file(&serial->dev->dev, &dev_attr_release_version); + device_remove_file(&serial->dev->dev, &dev_attr_lock_forever); } static int __init cp2101_init (void) @@ -758,3 +1038,6 @@ MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); + +module_param(enable_config, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(enable_config, "Enable sysfs access to configuration eeprom."); diff -purN linux-2.6.24/drivers/usb/serial/cp2101.c.orig linux-2.6.24-diff/drivers/usb/serial/cp2101.c.orig --- linux-2.6.24/drivers/usb/serial/cp2101.c.orig 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.24-diff/drivers/usb/serial/cp2101.c.orig 2008-01-24 23:58:37.000000000 +0100 @@ -0,0 +1,760 @@ +/* + * 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 + * + * Outstanding Issues: + * Buffers are not flushed when the port is opened. + * Multiple calls to write() may fail with "Resource temporarily unavailable" + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Version Information + */ +#define DRIVER_VERSION "v0.07" +#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 ktermios*); +static int cp2101_tiocmget (struct usb_serial_port *, struct file *); +static int cp2101_tiocmset (struct usb_serial_port *, struct file *, + unsigned int, unsigned int); +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(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(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, 0x803B) }, /* Pololu USB-serial converter */ + { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ + { 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, 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, 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, 0xEA60) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ + { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ + { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial 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_interrupt_in = 0, + .num_bulk_in = NUM_DONT_CARE, + .num_bulk_out = NUM_DONT_CARE, + .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", __FUNCTION__); + 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; idev, "%s - Unable to send config request, " + "request=0x%x size=%d result=%d\n", + __FUNCTION__, 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", + __FUNCTION__); + 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) { + dev_err(&port->dev, "%s - Unable to send request, " + "request=0x%x size=%d result=%d\n", + __FUNCTION__, 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); +} + +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_single(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); + + /* Set the DTR and RTS pins low */ + cp2101_tiocmset(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", __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_single(port, CP2101_UART, UART_DISABLE); +} + +/* + * 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 usb_serial_port *port) +{ + unsigned int cflag, modem_ctl[4]; + int baud; + int bits; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->tty || !port->tty->termios) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + + cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); + /* Convert to baudrate */ + if (baud) + baud = BAUD_RATE_GEN_FREQ / baud; + + dbg("%s - baud rate = %d", __FUNCTION__, baud); + + tty_encode_baud_rate(port->tty, baud, baud); + cflag = port->tty->termios->c_cflag; + + cp2101_get_config(port, CP2101_BITS, &bits, 2); + cflag &= ~CSIZE; + switch(bits & BITS_DATA_MASK) { + case BITS_DATA_5: + dbg("%s - data bits = 5", __FUNCTION__); + cflag |= CS5; + break; + 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, 2); + 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, 2); + 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, 2); + 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, 2); + break; + default: + dbg("%s - Unknown parity mode, " + "disabling parity", __FUNCTION__); + 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", __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, 2); + 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, 2); + break; + } + + cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); + if (modem_ctl[0] & 0x0008) { + dbg("%s - flow control = CRTSCTS", __FUNCTION__); + cflag |= CRTSCTS; + } else { + dbg("%s - flow control = NONE", __FUNCTION__); + cflag &= ~CRTSCTS; + } + + port->tty->termios->c_cflag = cflag; +} + +static void cp2101_set_termios (struct usb_serial_port *port, + struct ktermios *old_termios) +{ + unsigned int cflag, old_cflag; + int baud=0, bits; + unsigned int modem_ctl[4]; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->tty || !port->tty->termios) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + port->tty->termios->c_cflag &= ~CMSPAR; + + cflag = port->tty->termios->c_cflag; + old_cflag = old_termios->c_cflag; + baud = tty_get_baud_rate(port->tty); + + /* If the baud rate is to be updated*/ + if (baud != tty_termios_baud_rate(old_termios)) { + switch (baud) { + case 0: + case 600: + case 1200: + case 1800: + case 2400: + case 4800: + case 7200: + case 9600: + case 14400: + case 19200: + case 28800: + case 38400: + case 55854: + case 57600: + case 115200: + case 127117: + case 230400: + case 460800: + case 921600: + case 3686400: + break; + default: + baud = 9600; + break; + } + + if (baud) { + dbg("%s - Setting baud rate to %d baud", __FUNCTION__, + baud); + if (cp2101_set_config_single(port, CP2101_BAUDRATE, + (BAUD_RATE_GEN_FREQ / baud))) { + dev_err(&port->dev, "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(port->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", __FUNCTION__); + break; + 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, 2)) + dev_err(&port->dev, "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", __FUNCTION__); + } else { + bits |= BITS_PARITY_EVEN; + dbg("%s - parity = EVEN", __FUNCTION__); + } + } + if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) + dev_err(&port->dev, "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", __FUNCTION__); + } else { + bits |= BITS_STOP_1; + dbg("%s - stop bits = 1", __FUNCTION__); + } + if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) + dev_err(&port->dev, "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", + __FUNCTION__, 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", __FUNCTION__); + } else { + modem_ctl[0] &= ~0x7B; + modem_ctl[0] |= 0x01; + modem_ctl[1] |= 0x40; + dbg("%s - flow control = NONE", __FUNCTION__); + } + + dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", + __FUNCTION__, 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 usb_serial_port *port, struct file *file, + unsigned int set, unsigned int clear) +{ + int control = 0; + + dbg("%s - port %d", __FUNCTION__, 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", __FUNCTION__, control); + + return cp2101_set_config(port, CP2101_CONTROL, &control, 2); + +} + +static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) +{ + int control, result; + + dbg("%s - port %d", __FUNCTION__, 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", __FUNCTION__, control); + + return result; +} + +static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) +{ + int 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, 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", __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"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/