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olimex: fix V2 startup errors. 

Configuring modem control lines and baud rate is only required for V1
devices.
This commit is contained in:
Daniel Beer 2011-12-26 11:09:13 +13:00
parent c425c497e8
commit f501ab0843
1 changed files with 49 additions and 40 deletions
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89
drivers/olimex.c
View File

@ -72,6 +72,53 @@ struct olimex_transport {
#define TIMEOUT 10000 #define TIMEOUT 10000
static int v1_configure(struct olimex_transport *tr)
{
int ret;
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
CP210X_IFC_ENABLE, 0x1, 0, NULL, 0, 300);
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210x_REQTYPE_HOST_TO_DEVICE, ret = %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't enable CP210x UART");
return -1;
}
/* Set the baud rate to 500000 bps */
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
CP210X_SET_BAUDDIV, 0x7, 0, NULL, 0, 300);
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210X_SET_BAUDDIV, ret = %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't set baud rate");
return -1;
}
/* Set the modem control settings.
* Set RTS, DTR and WRITE_DTR, WRITE_RTS
*/
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
CP210X_SET_MHS, 0x303, 0, NULL, 0, 300);
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210X_SET_MHS, ret %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't set modem control");
return -1;
}
return 0;
}
static int open_interface(struct olimex_transport *tr, static int open_interface(struct olimex_transport *tr,
struct usb_device *dev, int ino) struct usb_device *dev, int ino)
{ {
@ -79,7 +126,6 @@ static int open_interface(struct olimex_transport *tr,
int drv; int drv;
char drName[256]; char drName[256];
#endif #endif
int ret;
printc(__FILE__": Trying to open interface %d on %s\n", printc(__FILE__": Trying to open interface %d on %s\n",
ino, dev->filename); ino, dev->filename);
@ -118,45 +164,8 @@ static int open_interface(struct olimex_transport *tr,
return -1; return -1;
} }
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE, if (dev->descriptor.idProduct == V1_PRODUCT && v1_configure(tr) < 0) {
CP210X_IFC_ENABLE, 0x1, 0, NULL, 0, 300); printc_err("Failed to configure for V1 device\n");
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210x_REQTYPE_HOST_TO_DEVICE, ret = %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't enable CP210x UART");
usb_close(tr->handle);
return -1;
}
/* Set the baud rate to 500000 bps */
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
CP210X_SET_BAUDDIV, 0x7, 0, NULL, 0, 300);
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210X_SET_BAUDDIV, ret = %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't set baud rate");
usb_close(tr->handle);
return -1;
}
/* Set the modem control settings.
* Set RTS, DTR and WRITE_DTR, WRITE_RTS
*/
ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
CP210X_SET_MHS, 0x303, 0, NULL, 0, 300);
#ifdef DEBUG_OLIMEX
printc("%s: %s: Sending control message "
"CP210X_SET_MHS, ret %d\n",
__FILE__, __FUNCTION__, ret);
#endif
if (ret < 0) {
pr_error(__FILE__": can't set modem control");
usb_close(tr->handle); usb_close(tr->handle);
return -1; return -1;
} }