GOSTSec/sgminer
1
0
Fork 0
mirror of https://github.com/GOSTSec/sgminer synced 2025-01-11 07:17:58 +00:00
Code Issues Releases Wiki Activity

libztex: Factor out local version of libusb_get_string_descriptor_ascii()

Browse Source
This commit is contained in:
Peter Stuge 2012-12-04 11:30:04 +01:00 committed by Denis Ahrens
parent 90b3e6adbd
commit f967392877
1 changed files with 42 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
libztex.c
View File

@ -48,6 +48,47 @@
//* Capability index for multi FPGA support. //* Capability index for multi FPGA support.
#define CAPABILITY_MULTI_FPGA 0,7 #define CAPABILITY_MULTI_FPGA 0,7
static int libztex_get_string_descriptor_ascii(libusb_device_handle *dev, uint8_t desc_index,
unsigned char *data, int length) {
int i, cnt;
uint16_t langid;
unsigned char buf[260];
/* We open code string descriptor retrieval and ASCII decoding here
* in order to work around that libusb_get_string_descriptor_ascii()
* in the FreeBSD libusb implementation hits a bug in ZTEX firmware,
* where the device returns more bytes than requested, causing babble,
* which makes FreeBSD return an error to us.
*
* Avoid the mess by doing it manually the same way as libusb-1.0.
*/
cnt = libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN,
LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | 0,
0x0000, buf, sizeof(buf), 1000);
if (cnt < 0) {
applog(LOG_ERR, "%s: Failed to read LANGIDs: %s", __func__, libusb_error_name(cnt));
return cnt;
}
langid = libusb_le16_to_cpu(((uint16_t *)buf)[1]);
cnt = libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN,
LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | desc_index,
langid, buf, sizeof(buf), 1000);
if (cnt < 0) {
applog(LOG_ERR, "%s: Failed to read string descriptor: %s", __func__, libusb_error_name(cnt));
return cnt;
}
/* num chars = (all bytes except bLength and bDescriptorType) / 2 */
for (i = 0; i <= (cnt - 2) / 2 && i < length-1; i++)
data[i] = buf[2 + i*2];
data[i] = 0;
return LIBUSB_SUCCESS;
}
enum check_result { enum check_result {
CHECK_ERROR, CHECK_ERROR,
@ -527,7 +568,6 @@ int libztex_prepare_device(struct libusb_device *dev, struct libztex_device** zt
struct libztex_device *newdev = *ztex; struct libztex_device *newdev = *ztex;
int i, cnt, err; int i, cnt, err;
unsigned char buf[64]; unsigned char buf[64];
uint16_t langid;
err = libusb_open(dev, &newdev->hndl); err = libusb_open(dev, &newdev->hndl);
if (err != LIBUSB_SUCCESS) { if (err != LIBUSB_SUCCESS) {
@ -541,40 +581,12 @@ int libztex_prepare_device(struct libusb_device *dev, struct libztex_device** zt
return CHECK_ERROR; return CHECK_ERROR;
} }
/* We open code string descriptor retrieval and ASCII decoding here cnt = libztex_get_string_descriptor_ascii(newdev->hndl, newdev->descriptor.iSerialNumber, newdev->snString, sizeof(newdev->snString));
* in order to work around that libusb_get_string_descriptor_ascii()
* in the FreeBSD libusb implementation hits a bug in ZTEX firmware,
* where the device returns more bytes than requested, causing babble,
* which makes FreeBSD return an error to us.
*
* Avoid the mess by doing it manually the same way as libusb-1.0.
*/
cnt = libusb_control_transfer(newdev->hndl, LIBUSB_ENDPOINT_IN,
LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | 0,
0x0000, buf, sizeof(buf), 1000);
if (unlikely(cnt < 0)) {
applog(LOG_ERR, "Ztex check device: Failed to read device LANGIDs with err %d", cnt);
return cnt;
}
langid = libusb_le16_to_cpu(((uint16_t *)buf)[1]);
cnt = libusb_control_transfer(newdev->hndl, LIBUSB_ENDPOINT_IN,
LIBUSB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING << 8) | newdev->descriptor.iSerialNumber,
langid, buf, sizeof(buf), 1000);
if (unlikely(cnt < 0)) { if (unlikely(cnt < 0)) {
applog(LOG_ERR, "Ztex check device: Failed to read device snString with err %d", cnt); applog(LOG_ERR, "Ztex check device: Failed to read device snString with err %d", cnt);
return cnt; return cnt;
} }
/* num chars = (all bytes except bLength and bDescriptorType) / 2 */
for (i = 0; i <= (cnt - 2) / 2 && i < (int)sizeof(newdev->snString)-1; i++)
newdev->snString[i] = buf[2 + i*2];
newdev->snString[i] = 0;
cnt = libusb_control_transfer(newdev->hndl, 0xc0, 0x22, 0, 0, buf, 40, 500); cnt = libusb_control_transfer(newdev->hndl, 0xc0, 0x22, 0, 0, buf, 40, 500);
if (unlikely(cnt < 0)) { if (unlikely(cnt < 0)) {
applog(LOG_ERR, "Ztex check device: Failed to read ztex descriptor with err %d", cnt); applog(LOG_ERR, "Ztex check device: Failed to read ztex descriptor with err %d", cnt);