* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
* control thanks to Munir Nassar nassarmu@real-time.com
*
+ * Port configuration, usb descriptor and gpio management by R. Steve McKown
+ * (smckown@titaniummirror.com).
+ *
* Outstanding Issues:
* Buffers are not flushed when the port is opened.
* Multiple calls to write() may fail with "Resource temporarily unavailable"
*
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/version.h>
#include <asm/uaccess.h>
+#include <linux/byteorder/generic.h>
#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) ((a)*65536 + (b)*256 + (c))
#ifdef LINUX26
#include <linux/moduleparam.h>
+#include <linux/usb/serial.h>
#define DEV_ERR(dev,format,arg...) dev_err(dev,format, ## arg)
#define USB_KILL_URB usb_kill_urb
#else /* !LINUX26 */
+#include <linux/config.h>
+#include "usb-serial.h"
+
#ifdef CONFIG_USB_SERIAL_DEBUG
static int debug = 1;
#else
#endif /* LINUX26 */
-#include "usb-serial.h"
-
/*
* Version Information
* RJM: updated to 0.11 for 2.6.15 and later kernels
*/
-#define DRIVER_VERSION "v0.11"
+#define DRIVER_VERSION "v0.11rsm"
#define DRIVER_DESC "Silicon Labs CP2101/CP2102/CP2103 RS232 serial adaptor driver"
/*
static int debug;
static struct usb_device_id id_table [] = {
- { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
- { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
- { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
+ { USB_DEVICE(0x0FCF, 0x1003) }, /* 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, 0x803B) }, /* Pololu USB-serial converter */
+ { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
+ { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
+ { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
+ { 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, 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(0x13AD, 0x9999) }, /* Baltech card reader */
+ { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
{ } /* Terminating Entry */
};
.num_ports = 1,
.open = cp2101_open,
.close = cp2101_close,
- .ioctl = cp2101_ioctl, /* GLA, Added backport */
+ .ioctl = cp2101_ioctl, /* GLA, Added backport */
.break_ctl = cp2101_break_ctl,
.set_termios = cp2101_set_termios,
#ifdef LINUX26
#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_get_config
* Reads from the CP2101 configuration registers
return cp2101_set_config(port, request, &data, 2);
}
+/*
+ * 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 */
+ ret = (cp2101_ctlmsg(port, 0xff, 0xc0, 0x370b, 0x00, &_partnum, 1)
+ == 1) ? CP210x_SUCCESS : 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, 3700 | (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 a single byte to represent 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;
+}
+
static int cp2101_open (struct usb_serial_port *port, struct file *filp)
{
struct usb_serial *serial = port->serial;
cp2101_set_config(port, CP2101_BREAK, &state, 2);
}
-static int cp2101_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
+/* 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;
+
+}
+
+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);
int result = cp2101_tiocmget(port, file);
if (copy_to_user(&arg, &result, sizeof(int)))
return -EFAULT;
+ return 0;
}
break;
case TIOCMBIC:
{
int val = 0;
+
+ if (copy_from_user(&val, &arg, sizeof(int)))
+ return -EFAULT;
- 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;
+#endif
+
+ 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 /* Don't know how to set manufacturer desc yet */
+ {
+ 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);
MODULE_PARM(debug, "i");
#endif
MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
+
+/*
+vi:ts=4
+*/
+
--- /dev/null
+/**
+ * cptwiddle.c
+ *
+ * Twiddle the leds connected to the cp2103's GPIO_0 and GPIO_1 pins on the
+ * USB device. Twiddle does the following:
+ *
+ * - Saves the current latch and port config settings
+ * - Reconfigures for leds as IO
+ * - Resets the device and reconnects to it
+ * - Twiddles the LEDs
+ * - Restores the original configuration
+ * - Resets the device again so that the original config is immediately active
+ *
+ * Watch out; the tty device is hard-coded.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+/* 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? */
+
+
+typedef struct {
+ uint16_t mode;
+ uint16_t lowPower;
+ uint16_t latch;
+} cp2103_port_state_t;
+
+typedef struct {
+ cp2103_port_state_t reset;
+ cp2103_port_state_t suspend;
+ uint8_t enhancedFxn;
+} cp2103_port_config_t;
+
+int cpConnect()
+{
+ int ret, ioval;
+ int fd = open("/dev/usb/tts/0", O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "cannot open tty\n");
+ return -1;
+ }
+ printf("tty opened\n");
+ return fd;
+}
+
+void cpDisconnect(int fd)
+{
+ if (fd >= 0)
+ close(fd);
+}
+
+int main()
+{
+ int fd;
+ cp2103_port_config_t config;
+ cp2103_port_config_t saveConfig;
+ uint8_t saveGpio;
+ int ret;
+ int i;
+
+ if ((fd = cpConnect()) < 0)
+ return 1;
+
+ /* Read the current port configuration */
+ if ((ret = ioctl(fd, IOCTL_PORTCONFGET, &config))) {
+ fprintf(stderr, "portconfget ioctl failed %d\n", ret);
+ return 1;
+ }
+ memcpy(&saveConfig, &config, sizeof(config));
+ printf("port config received\n");
+
+ /* Read the current gpio latches */
+ if ((ret = ioctl(fd, IOCTL_GPIOGET, &saveGpio))) {
+ fprintf(stderr, "gpioget ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("saved gpio latches 0x%02x\n", saveGpio);
+
+ /* Set the current port configuration; set GPIO_0 and GPIO_1 as outputs */
+ config.reset.mode &= ~0x0300;
+ config.suspend.mode &= ~0x0300;
+ config.reset.latch |= 0x0300;
+ config.enhancedFxn &= ~0x03;
+ if ((ret = ioctl(fd, IOCTL_PORTCONFSET, &config))) {
+ fprintf(stderr, "portconfset ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("port config altered\n");
+
+ /* Reset the part */
+ if ((ret = ioctl(fd, IOCTL_DEVICERESET, 0))) {
+ fprintf(stderr, "device reset ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("device reset\n");
+
+ /* Disconnect then reconnect */
+ cpDisconnect(fd);
+ printf("disconnected\n");
+ for (i = 0; i < 10; i++) {
+ sleep(1);
+ if ((fd = cpConnect()) >= 0)
+ break;
+ }
+ if (i == 100) {
+ printf("failed to reconnect\n");
+ return 1;
+ }
+ printf("reconnected\n");
+
+ /* Now, twiddle some bits */
+ for (i = 0; i < 8; i++) {
+ uint8_t leds = i & 0x03;
+ if ((ret = ioctl(fd, IOCTL_GPIOSET, leds))) {
+ fprintf(stderr, "gpio set ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("set leds %u\n", leds);
+ sleep(1);
+ }
+
+ /* Restore the original latches */
+ if ((ret = ioctl(fd, IOCTL_GPIOSET, saveGpio))) {
+ fprintf(stderr, "gpio set ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("gpio latches restored\n");
+
+ /* Return the original configuration */
+ if ((ret = ioctl(fd, IOCTL_PORTCONFSET, &saveConfig))) {
+ fprintf(stderr, "portconfset ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("port config restored\n");
+
+ /* Reset the part again */
+ if ((ret = ioctl(fd, IOCTL_DEVICERESET, 0))) {
+ fprintf(stderr, "device reset ioctl failed %d\n", ret);
+ return 1;
+ }
+ printf("device reset again\n");
+
+ cpDisconnect(fd);
+ return 0;
+}
projects / cp210x.git / commitdiff