-/*
- * Silicon Laboratories CP2101/CP2102/CP2103 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
- *
- * Silicon Labs RJM: updated to 0.11 for 2.6.15 and later kernels
- *
- * Port configuration, usb descriptor and gpio management by R. Steve McKown
- * rsmckown@gmail.com.
- *
- * Outstanding Issues:
- * Buffers are not flushed when the port is opened.
- * Multiple calls to write() may fail with "Resource temporarily unavailable"
- *
- */
-
-#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 <linux/usb/serial.h>
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v0.11rsm"
-#define DRIVER_DESC "Silicon Labs CP2101/CP2102/CP2103 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 cp2101_ioctl(struct usb_serial_port *, struct file *,
- unsigned int, unsigned long);
-
-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_interrupt_in = 0,
- .num_bulk_in = NUM_DONT_CARE,
- .num_bulk_out = NUM_DONT_CARE,
- .num_ports = 1,
- .open = cp2101_open,
- .close = cp2101_close,
- .ioctl = cp2101_ioctl,
- .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
-
-/* CP2103 ioctls */
-#define IOCTL_GPIOGET 0x8000 /* Get gpio bits */
-#define IOCTL_GPIOSET 0x8001 /* Set gpio bits */
-#define IOCTL_GPIOBIC 0x8002 /* Clear specific gpio bit(s) */
-#define IOCTL_GPIOBIS 0x8003 /* Set specific gpio bit(s) */
-
-/* CP210x ioctls principally used during initial device configuration */
-#define IOCTL_DEVICERESET 0x8004 /* Reset the cp210x */
-#define IOCTL_PORTCONFGET 0x8005 /* Get port configuration */
-#define IOCTL_PORTCONFSET 0x8006 /* Set port configuration */
-#define IOCTL_SETVID 0x8007 /* Set vendor id */
-#define IOCTL_SETPID 0x8008 /* Set product id */
-#define IOCTL_SETMFG 0x8009 /* Set manufacturer string */
-#define IOCTL_SETPRODUCT 0x800a /* Set product string */
-#define IOCTL_SETSERIAL 0x800b /* Set serial number string */
-#define IOCTL_SETDEVVER 0x800c /* set device version id */
-/* FIXME: where is IOCTL_SETMFG? */
-
-/* CP2103 GPIO */
-#define GPIO_0 0x01
-#define GPIO_1 0x02
-#define GPIO_2 0x04
-#define GPIO_3 0x08
-#define GPIO_MASK (GPIO_0|GPIO_1|GPIO_2|GPIO_3)
-
-/* GetDeviceVersion() return codes */
-#define CP210x_CP2101_VERSION 0x01
-#define CP210x_CP2102_VERSION 0x02
-#define CP210x_CP2103_VERSION 0x03
-
-/* Return codes */
-#define CP210x_SUCCESS 0x00
-#define CP210x_DEVICE_NOT_FOUND 0xFF
-#define CP210x_INVALID_HANDLE 0x01
-#define CP210x_INVALID_PARAMETER 0x02
-#define CP210x_DEVICE_IO_FAILED 0x03
-#define CP210x_FUNCTION_NOT_SUPPORTED 0x04
-#define CP210x_GLOBAL_DATA_ERROR 0x05
-#define CP210x_FILE_ERROR 0x06
-#define CP210x_COMMAND_FAILED 0x08
-#define CP210x_INVALID_ACCESS_TYPE 0x09
-
-/* USB descriptor sizes */
-#define CP210x_MAX_DEVICE_STRLEN 256
-#define CP210x_MAX_PRODUCT_STRLEN 126
-#define CP210x_MAX_SERIAL_STRLEN 63
-#define CP210x_MAX_MAXPOWER 250
-
-/* Used to pass variable sized buffers between user and kernel space (ioctls) */
-typedef struct {
- char* buf;
- size_t len;
-} cp2101_buffer_t;
-
-/* Port config definitions */
-typedef struct {
- uint16_t mode; /* Push-pull = 1, Open-drain = 0 */
- uint16_t lowPower;
- uint16_t latch; /* Logic high = 1, Logic low = 0 */
-} cp2101_port_state_t;
-
-typedef struct {
- cp2101_port_state_t reset;
- cp2101_port_state_t suspend;
- uint8_t enhancedFxn;
-} cp2101_port_config_t;
-
-#define PORT_CONFIG_LEN 13 /* Because sizeof() will pad to full words */
-
-/*
- * cp2101_buf_from_user
- * Copy a buffer from user space, returning the number of bytes copied
- * from ubuf.buf into kbuf. klen is the size of the buffer at kbuf.
- */
-size_t copy_buf_from_user(char *kbuf, unsigned long ubuf, size_t klen)
-{
- cp2101_buffer_t t;
-
- if (!kbuf || !ubuf || !klen ||
- copy_from_user(&t, (cp2101_buffer_t *)ubuf, sizeof(t)))
- return 0;
- if (t.len < klen)
- klen = t.len;
- if (!t.buf || !t.len || copy_from_user(kbuf, t.buf, klen))
- return 0;
- return klen;
-}
-
-/*
- * cp2101_ctlmsg
- * A generic usb control message interface.
- * Returns the actual size of the data read or written within the message, 0
- * if no data were read or written, or a negative value to indicate an error.
- */
-static int cp2101_ctlmsg(struct usb_serial_port* port, u8 request,
- u8 requestype, u16 value, u16 index, void* data, u16 size)
-{
- struct usb_device *dev = port->serial->dev;
- u8 *tbuf;
- int ret;
-
- if (!(tbuf = kmalloc(size, GFP_KERNEL)))
- return -ENOMEM;
- if (requestype & 0x80) {
- ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
- requestype, value, index, tbuf, size, 300);
- if (ret > 0 && size)
- memcpy(data, tbuf, size);
- } else {
- if (size)
- memcpy(tbuf, data, size);
- ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
- requestype, value, index, tbuf, size, 300);
- }
- kfree(tbuf);
- if (ret < 0 && ret != -EPIPE) {
- dev_printk(KERN_DEBUG, &dev->dev, "cp2101: control failed cmd rqt %u "
- "rq %u len %u ret %d\n", requestype, request, size, ret);
- }
- return ret;
-}
-
-static int cp2101_reset(struct usb_serial_port *port)
-{
- dbg("%s", __FUNCTION__);
-
-#if 1
- /* Is this better than usb_device_reset? It may be. Once a client issues
- * the reset ioctl, it must disconnect and reconnect, since the USB
- * connections are torn down. We also ignore the error return, since
- * the part resets and doesn't send one...
- */
- cp2101_ctlmsg(port, 0xff, 0x40, 0x0008, 0x00, 0, 0);
-#else
- usb_reset_device(port->serial->dev);
-#endif
- return 0;
-}
-
-static int cp2101_get_partnum(struct usb_serial_port *port)
-{
- static u8 _partnum = 0;
- int ret = CP210x_SUCCESS;
- if (!_partnum) {
- u8 addr = port->serial->dev->actconfig->interface[0]->
- cur_altsetting->endpoint[0].desc.bEndpointAddress &
- USB_ENDPOINT_NUMBER_MASK;
-
- if (addr == 0x03 || addr == 0x02) /* The part is a cp2101 */
- _partnum = 0x01;
- else if (addr == 0x01) {
- /* Must query part to determine part number */
- if (cp2101_ctlmsg(port, 0xff, 0xc0, 0x370b, 0x00,
- &_partnum, 1) != 1)
- ret = CP210x_DEVICE_IO_FAILED;
- } else
- ret = CP210x_DEVICE_IO_FAILED;
- }
- dbg("%s - partnum %u err %d", __FUNCTION__, _partnum, ret);
- return (ret == CP210x_SUCCESS) ? _partnum : 0;
-}
-
-inline int cp2101_setu16(struct usb_serial_port *port, int cmd,
- unsigned int value)
-{
- return cp2101_ctlmsg(port, 0xff, 0x40, 0x3700 | (cmd & 0xff),
- value, 0, 0);
-}
-
-/* Populates usbstr with: (len) + (0x03) + unicode(str). Each char in str
- * takes up two bytes in unicode format, so the resulting len(usbstr) is
- * 2 * len(str) + 2.
- * Returns the resulting length of the string in usbstr.
- * This function can accept overlapping usbstr and str as long as the overlap
- * does not cause data written to usbstr to overwrite data not yet read from
- * str.
- */
-static int make_usb_string(char* usbstr, size_t usblen, char* src,
- size_t srclen)
-{
- int len = 0;
-
- if (usbstr && usblen >= 2 && src && *src && srclen) {
- char* p;
-
- /* The usb string format uses first byte as length */
- if (usblen > 256)
- usblen = 256;
-
- p = usbstr + 1;
- *p++ = 0x03;
- len = 2;
- while (srclen && len < usblen) {
- *p++ = *src++;
- *p++ = 0;
- len += 2;
- srclen--;
- }
- *usbstr = (char)len;
- }
- return len;
-}
-
-/*
- * cp2101_setstr
- *
- * Set a USB string descriptor using proprietary cp210x control messages.
- * Return the number of characters actually written.
- */
-inline int cp2101_setstr(struct usb_serial_port *port, int cmd, char *usbstr)
-{
- unsigned len = usbstr[0];
- int ret = cp2101_ctlmsg(port, 0xff, 0x40, 0x3700 | (cmd & 0xff), 0,
- usbstr, len);
- dbg("%s - cmd 0x%02x len %d ret %d", __FUNCTION__, cmd, len, ret);
- return ret;
-}
-
-/* Set all gpio simultaneously */
-static int cp2101_gpioset(struct usb_serial_port *port, u8 gpio)
-{
- dbg("%s - port %d, gpio = 0x%.2x", __FUNCTION__, port->number, gpio);
-
- return cp2101_ctlmsg(port, 0xff, 0x40, 0x37e1,
- ((uint16_t)gpio << 8) | GPIO_MASK, 0, 0);
-}
-
-/* Set select gpio bits */
-static int cp2101_gpiosetb(struct usb_serial_port *port, u8 set, u8 clear)
-{
- u16 gpio = 0;
-
- /* The bitmask is in the LSB, the values in the MSB */
- if (set & GPIO_0)
- gpio |= (GPIO_0 << 8)|GPIO_0;
- if (set & GPIO_1)
- gpio |= (GPIO_1 << 8)|GPIO_1;
- if (set & GPIO_2)
- gpio |= (GPIO_2 << 8)|GPIO_2;
- if (set & GPIO_3)
- gpio |= (GPIO_3 << 8)|GPIO_3;
- if (clear & GPIO_0)
- gpio = (gpio & ~(GPIO_0 << 8))|GPIO_0;
- if (clear & GPIO_1)
- gpio = (gpio & ~(GPIO_1 << 8))|GPIO_1;
- if (clear & GPIO_2)
- gpio = (gpio & ~(GPIO_2 << 8))|GPIO_2;
- if (clear & GPIO_3)
- gpio = (gpio & ~(GPIO_3 << 8))|GPIO_3;
-
- dbg("%s - port %d, gpiob = 0x%.4x", __FUNCTION__, port->number, gpio);
-
- /* FIXME: how about REQTYPE_HOST_TO_DEVICE instead of 0x40? */
- return cp2101_ctlmsg(port, 0xff, 0x40, 0x37e1, gpio, 0, 0);
-}
-
-static int cp2101_gpioget(struct usb_serial_port *port, u8* gpio)
-{
- int ret;
-
- dbg("%s - port %d", __FUNCTION__, port->number);
-
- /* FIXME: how about REQTYPE_DEVICE_TO_HOST instead of 0xc0? */
- ret = cp2101_ctlmsg(port, 0xff, 0xc0, 0x00c2, 0, gpio, 1);
-
- dbg("%s - gpio = 0x%.2x (%d)", __FUNCTION__, *gpio, ret);
-
- return (ret == 1) ? 0 : -1;
-}
-
-static int cp2101_portconfset(struct usb_serial_port *port,
- cp2101_port_config_t* config)
-{
- cp2101_port_config_t lconfig;
- int ret;
-
- dbg("%s", __FUNCTION__);
-
- memcpy(&lconfig, config, sizeof(lconfig));
-
- /* apparently not implemented yet */
- lconfig.suspend.lowPower = 0;
- lconfig.reset.lowPower = 0;
-
- /* Words from cp2103 are MSB */
- lconfig.reset.mode = cpu_to_be16(config->reset.mode);
- /* lconfig.reset.lowPower = cpu_to_be16(config->reset.lowPower); */
- lconfig.reset.latch = cpu_to_be16(config->reset.latch);
- lconfig.suspend.mode = cpu_to_be16(config->suspend.mode);
- /* lconfig.suspend.lowPower = cpu_to_be16(config->suspend.lowPower); */
- lconfig.suspend.latch = cpu_to_be16(config->suspend.latch);
-
- ret = cp2101_ctlmsg(port, 0xff, 0x40, 0x370c, 0, &lconfig,
- PORT_CONFIG_LEN);
- if (ret == PORT_CONFIG_LEN)
- return 0;
- else if (ret >= 0)
- return -1;
- else
- return ret;
-}
-
-static int cp2101_portconfget(struct usb_serial_port *port,
- cp2101_port_config_t* config)
-{
- int ret;
-
- dbg("%s", __FUNCTION__);
-
- ret = cp2101_ctlmsg(port, 0xff, 0xc0, 0x370c, 0, config,
- PORT_CONFIG_LEN);
- if (ret == PORT_CONFIG_LEN) {
- /* Words from cp2103 are MSB */
- config->reset.mode = be16_to_cpu(config->reset.mode);
- config->reset.lowPower = be16_to_cpu(config->reset.lowPower);
- config->reset.latch = be16_to_cpu(config->reset.latch);
- config->suspend.mode = be16_to_cpu(config->suspend.mode);
- config->suspend.lowPower =
- be16_to_cpu(config->suspend.lowPower);
- config->suspend.latch = be16_to_cpu(config->suspend.latch);
-
- /* apparently not implemented yet */
- config->reset.lowPower = 0;
- config->suspend.lowPower = 0;
-
- return 0;
- } else if (ret >= 0)
- return -1;
- else
- return ret;
-
-}
-
-/*
- * 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; i<length; i++)
- data[i] = le32_to_cpu(buf[i]);
-
- kfree(buf);
-
- if (result != size) {
- dev_err(&port->dev, "%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);
-}
-
-static int cp2101_ioctl(struct usb_serial_port *port, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
-
- switch (cmd) {
-
- case TIOCMGET:
- {
- int result = cp2101_tiocmget(port, file);
- if (copy_to_user(&arg, &result, sizeof(int)))
- return -EFAULT;
- return 0;
- }
- break;
-
- case TIOCMSET:
- case TIOCMBIS:
-
- case TIOCMBIC:
- {
- int val = 0;
-
- if (copy_from_user(&val, &arg, sizeof(int)))
- return -EFAULT;
-
- /* this looks wrong: TIOCMSET isn't going to work right */
- if (cp2101_tiocmset(port, file, cmd==TIOCMBIC ? 0 : val,
- cmd==TIOCMBIC ? val : 0))
- return -EFAULT;
- return 0;
- }
- break;
-
- case IOCTL_GPIOGET:
- if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION) {
- u8 gpio = 0;
- if (!cp2101_gpioget(port, &gpio) && !copy_to_user((u8*)arg,
- &gpio, sizeof(gpio)))
- return 0;
- }
- return -EFAULT;
- break;
-
- case IOCTL_GPIOSET:
- if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION &&
- !cp2101_gpioset(port, arg))
- return 0;
- return -EFAULT;
- break;
-
- case IOCTL_GPIOBIC:
- case IOCTL_GPIOBIS:
- if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION &&
- !cp2101_gpiosetb(port, (cmd==IOCTL_GPIOBIC) ? 0 : arg,
- (cmd==IOCTL_GPIOBIC) ? arg : 0))
- return 0;
- return -EFAULT;
- break;
-
- case IOCTL_DEVICERESET:
- return cp2101_reset(port);
- break;
-
- case IOCTL_PORTCONFGET:
- {
- cp2101_port_config_t config;
- if (!cp2101_portconfget(port, &config) && !copy_to_user(
- (cp2101_port_config_t*)arg, &config,
- sizeof(config)))
- return 0;
- }
- return -EFAULT;
- break;
-
- case IOCTL_PORTCONFSET:
- {
- cp2101_port_config_t config;
- if (!copy_from_user(&config, (cp2101_port_config_t*)arg,
- sizeof(config)) &&
- !cp2101_portconfset(port, &config))
- return 0;
- return -EFAULT;
- }
- break;
-
- case IOCTL_SETVID:
- {
- unsigned int vid;
- if (!copy_from_user(&vid, (unsigned int *)arg,
- sizeof(unsigned int)) &&
- !cp2101_setu16(port, 0x01, vid))
- return 0;
- return -EFAULT;
- }
- break;
-
- case IOCTL_SETPID:
- {
- unsigned int pid;
- if (!copy_from_user(&pid, (unsigned int *)arg,
- sizeof(unsigned int)) &&
- !cp2101_setu16(port, 0x02, pid))
- return 0;
- return -EFAULT;
- }
- break;
-
- case IOCTL_SETMFG:
-#if 0 /* Silicon Labs apparently doesn't provide for setting of mfg desc */
- {
- char usbstr[CP210x_MAX_MFG_STRLEN * 2 + 2];
- size_t len = copy_buf_from_user(usbstr + sizeof(usbstr) -
- CP210x_MAX_MFG_STRLEN, arg,
- CP210x_MAX_MFG_STRLEN);
- len = make_usb_string(usbstr, sizeof(usbstr), str, len);
- if (len && cp2101_setstr(port, 0x00, usbstr) == len)
- return 0;
- return -EFAULT;
- }
-#endif
- break;
-
- case IOCTL_SETPRODUCT:
- {
- char usbstr[CP210x_MAX_PRODUCT_STRLEN * 2 + 2];
- char* str = usbstr + sizeof(usbstr) - CP210x_MAX_PRODUCT_STRLEN;
- size_t len = copy_buf_from_user(str, arg,
- CP210x_MAX_PRODUCT_STRLEN);
- len = make_usb_string(usbstr, sizeof(usbstr), str, len);
- if (len && cp2101_setstr(port, 0x03, usbstr) == len)
- return 0;
- return -EFAULT;
- }
- break;
-
- case IOCTL_SETSERIAL:
- {
- char usbstr[CP210x_MAX_SERIAL_STRLEN * 2 + 2];
- char* str = usbstr + sizeof(usbstr) - CP210x_MAX_SERIAL_STRLEN;
- size_t len = copy_buf_from_user(str, arg,
- CP210x_MAX_SERIAL_STRLEN);
- len = make_usb_string(usbstr, sizeof(usbstr), str, len);
- if (len && cp2101_setstr(port, 0x04, usbstr) == len)
- return 0;
- return -EFAULT;
- }
- break;
-
- case IOCTL_SETDEVVER:
- {
- unsigned int ver;
- if (!copy_from_user(&ver, (unsigned int *)arg,
- sizeof(unsigned int)) &&
- !cp2101_setu16(port, 0x07, ver))
- return 0;
- return -EFAULT;
- }
- break;
-
- default:
- dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
- break;
- }
-
- return -ENOIOCTLCMD;
-}
-
-/*
- * 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");
projects / cp210x.git / commitdiff