kopia lustrzana https://gitlab.com/sane-project/backends
Add LM983x usb chip detection when compiled for libusb-1.0.
Gerhard Jaeger
rodzic
c1fd1ed184
commit
ec4675d4c1
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@ -4063,6 +4063,213 @@ check_genesys (libusb_device_handle * handle,
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return "GL646_HP";
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}
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/********** the lm983x section **********/
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static int
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lm983x_wb (libusb_device_handle *handle, unsigned char reg, unsigned char val)
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{
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unsigned char buf[5];
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int written;
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int result;
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buf[0] = 0;
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buf[1] = reg;
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buf[2] = 0;
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buf[3] = 1;
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buf[4] = val;
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result = libusb_bulk_transfer(handle, 0x03, buf, 5, &written, TIMEOUT);
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if (result < 0)
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return 0;
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if (written != 5)
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return 0;
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return 1;
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}
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static int
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lm983x_rb (libusb_device_handle *handle, unsigned char reg, unsigned char *val)
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{
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unsigned char buf[5];
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int result;
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int tfx;
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buf[0] = 1;
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buf[1] = reg;
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buf[2] = 0;
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buf[3] = 1;
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result = libusb_bulk_transfer(handle, 0x03, buf, 4, &tfx, TIMEOUT);
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if (result < 0)
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return 0;
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if (tfx != 4)
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return 0;
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result = libusb_bulk_transfer(handle, 0x82, val, 1, &tfx, TIMEOUT);
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if (result < 0)
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return 0;
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if (tfx != 1)
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return 0;
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return 1;
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}
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/** @brief check for known LM983x chip (aka Merlin)
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*
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* Try to check if the scanner uses a LM983x ASIC.
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*
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* @param dev libusb device
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* @param hdl libusb opened handle
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* @param config0 configuration 0 from get config _descriptor
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* @return a string with ASIC name, or NULL if not recognized
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*/
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static char *
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check_merlin(libusb_device_handle * handle,
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struct libusb_device_descriptor desc,
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struct libusb_config_descriptor *config0)
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{
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unsigned char val;
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int result;
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if (verbose > 2)
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printf (" checking for LM983[1,2,3] ...\n");
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/* Check device descriptor */
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if (((desc.bDeviceClass != LIBUSB_CLASS_VENDOR_SPEC)
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&& (desc.bDeviceClass != 0))
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|| (config0->interface[0].altsetting[0].bInterfaceClass !=
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LIBUSB_CLASS_VENDOR_SPEC))
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{
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if (verbose > 2)
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printf
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(" this is not a LM983x (bDeviceClass = %d, bInterfaceClass = %d)\n",
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desc.bDeviceClass,
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config0->interface[0].altsetting[0].bInterfaceClass);
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return 0;
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}
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if ((desc.bcdUSB != 0x110)
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&& (desc.bcdUSB != 0x101)
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&& (desc.bcdUSB != 0x100))
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{
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if (verbose > 2)
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printf (" this is not a LM983x (bcdUSB = 0x%x)\n", desc.bcdUSB);
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return 0;
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}
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if (desc.bDeviceSubClass != 0x00)
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{
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if (verbose > 2)
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printf (" this is not a LM983x (bDeviceSubClass = 0x%x)\n",
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desc.bDeviceSubClass);
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return 0;
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}
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if ((desc.bDeviceProtocol != 0) &&
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(desc.bDeviceProtocol != 0xff))
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{
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if (verbose > 2)
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printf (" this is not a LM983x (bDeviceProtocol = 0x%x)\n",
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desc.bDeviceProtocol);
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return 0;
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}
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/* Check endpoints */
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if (config0->interface[0].altsetting[0].bNumEndpoints != 3)
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{
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if (verbose > 2)
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printf (" this is not a LM983x (bNumEndpoints = %d)\n",
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config0->interface[0].altsetting[0].bNumEndpoints);
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return 0;
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}
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if ((config0->interface[0].altsetting[0].endpoint[0].bEndpointAddress != 0x81)
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|| (config0->interface[0].altsetting[0].endpoint[0].bmAttributes != 0x03)
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|| (config0->interface[0].altsetting[0].endpoint[0].wMaxPacketSize != 0x1)
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|| (config0->interface[0].altsetting[0].endpoint[0].bInterval != 0x10))
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{
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if (verbose > 2)
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printf
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(" this is not a LM983x (bEndpointAddress = 0x%x, bmAttributes = 0x%x, "
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"wMaxPacketSize = 0x%x, bInterval = 0x%x)\n",
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config0->interface[0].altsetting[0].endpoint[0].bEndpointAddress,
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config0->interface[0].altsetting[0].endpoint[0].bmAttributes,
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config0->interface[0].altsetting[0].endpoint[0].wMaxPacketSize,
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config0->interface[0].altsetting[0].endpoint[0].bInterval);
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return 0;
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}
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if ((config0->interface[0].altsetting[0].endpoint[1].bEndpointAddress != 0x82)
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|| (config0->interface[0].altsetting[0].endpoint[1].bmAttributes != 0x02)
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|| (config0->interface[0].altsetting[0].endpoint[1].wMaxPacketSize != 0x40)
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/* Currently disabled as we have some problems in detection here ! */
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/*|| (config0->interface[0].altsetting[0].endpoint[1].bInterval != 0) */
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)
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{
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if (verbose > 2)
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printf
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(" this is not a LM983x (bEndpointAddress = 0x%x, bmAttributes = 0x%x, "
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"wMaxPacketSize = 0x%x, bInterval = 0x%x)\n",
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config0->interface[0].altsetting[0].endpoint[1].bEndpointAddress,
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config0->interface[0].altsetting[0].endpoint[1].bmAttributes,
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config0->interface[0].altsetting[0].endpoint[1].wMaxPacketSize,
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config0->interface[0].altsetting[0].endpoint[1].bInterval);
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return 0;
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}
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if ((config0->interface[0].altsetting[0].endpoint[2].bEndpointAddress != 0x03)
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|| (config0->interface[0].altsetting[0].endpoint[2].bmAttributes != 0x02)
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|| (config0->interface[0].altsetting[0].endpoint[2].wMaxPacketSize != 0x40)
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/* Currently disabled as we have some problems in detection here ! */
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/* || (config0->interface[0].altsetting[0].endpoint[2].bInterval != 0) */
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)
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{
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if (verbose > 2)
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printf
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(" this is not a LM983x (bEndpointAddress = 0x%x, bmAttributes = 0x%x, "
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"wMaxPacketSize = 0x%x, bInterval = 0x%x)\n",
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config0->interface[0].altsetting[0].endpoint[2].bEndpointAddress,
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config0->interface[0].altsetting[0].endpoint[2].bmAttributes,
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config0->interface[0].altsetting[0].endpoint[2].wMaxPacketSize,
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config0->interface[0].altsetting[0].endpoint[2].bInterval);
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return 0;
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}
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result = lm983x_wb (handle, 0x07, 0x00);
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if (1 == result)
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result = lm983x_wb (handle, 0x08, 0x02);
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if (1 == result)
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result = lm983x_rb (handle, 0x07, &val);
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if (1 == result)
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result = lm983x_rb (handle, 0x08, &val);
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if (1 == result)
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result = lm983x_rb (handle, 0x69, &val);
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if (0 == result)
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{
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if (verbose > 2)
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printf (" Couldn't access LM983x registers.\n");
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return 0;
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}
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switch (val)
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{
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case 4:
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return "LM9832/3";
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break;
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case 3:
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return "LM9831";
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break;
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case 2:
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return "LM9830";
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break;
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default:
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return "LM983x?";
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break;
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}
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}
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char *
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check_usb_chip (int verbosity,
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struct libusb_device_descriptor desc,
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@ -4101,6 +4308,9 @@ check_usb_chip (int verbosity,
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/* now USB is opened and set up, actual chip detection */
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if (!chip_name)
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chip_name = check_merlin (hdl, desc, config0);
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if (!chip_name)
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chip_name = check_gt6801 (hdl, desc, config0);
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