-
-#define STIR421X_PATCH_PRODUCT_VERSION_STR "Product Version: "
-#define STIR421X_PATCH_COMPONENT_VERSION_STR "Component Version: "
-#define STIR421X_PATCH_DATA_TAG_STR "STMP"
-#define STIR421X_PATCH_FILE_VERSION_MAX_OFFSET 512 /* version info is before here */
-#define STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET 512 /* patch image starts before here */
-#define STIR421X_PATCH_FILE_END_OF_HEADER_TAG 0x1A /* marks end of patch file header (PC DOS text file EOF character) */
-
-/*
- * Known firmware patches for STIR421x dongles
- */
-static char * stir421x_patches[] = {
- "42101001.sb",
- "42101002.sb",
-};
-
-static int stir421x_get_patch_version(unsigned char * patch, const unsigned long patch_len)
-{
- unsigned int version_offset;
- unsigned long version_major, version_minor, version_build;
- unsigned char * version_start;
- int version_found = 0;
-
- for (version_offset = 0;
- version_offset < STIR421X_PATCH_FILE_END_OF_HEADER_TAG;
- version_offset++) {
- if (!memcmp(patch + version_offset,
- STIR421X_PATCH_PRODUCT_VERSION_STR,
- sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1)) {
- version_found = 1;
- version_start = patch +
- version_offset +
- sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1;
- break;
- }
- }
-
- /* We couldn't find a product version on this patch */
- if (!version_found)
- return -EINVAL;
-
- /* Let's check if the product version is dotted */
- if (version_start[3] != '.' ||
- version_start[7] != '.')
- return -EINVAL;
-
- version_major = simple_strtoul(version_start, NULL, 10);
- version_minor = simple_strtoul(version_start + 4, NULL, 10);
- version_build = simple_strtoul(version_start + 8, NULL, 10);
-
- IRDA_DEBUG(2, "%s(), Major: %ld Minor: %ld Build: %ld\n",
- __FUNCTION__,
- version_major, version_minor, version_build);
-
- return (((version_major) << 12) +
- ((version_minor) << 8) +
- ((version_build / 10) << 4) +
- (version_build % 10));
-
-}
-
-
-static int stir421x_upload_patch (struct irda_usb_cb *self,
- unsigned char * patch,
- const unsigned int patch_len)
-{
- int retval = 0;
- int actual_len;
- unsigned int i = 0, download_amount = 0;
- unsigned char * patch_chunk;
-
- IRDA_DEBUG (2, "%s(), Uploading STIR421x Patch\n", __FUNCTION__);
-
- patch_chunk = kzalloc(STIR421X_MAX_PATCH_DOWNLOAD_SIZE, GFP_KERNEL);
- if (patch_chunk == NULL)
- return -ENOMEM;
-
- /* break up patch into 1023-byte sections */
- for (i = 0; retval >= 0 && i < patch_len; i += download_amount) {
- download_amount = patch_len - i;
- if (download_amount > STIR421X_MAX_PATCH_DOWNLOAD_SIZE)
- download_amount = STIR421X_MAX_PATCH_DOWNLOAD_SIZE;
-
- /* download the patch section */
- memcpy(patch_chunk, patch + i, download_amount);
-
- retval = usb_bulk_msg (self->usbdev,
- usb_sndbulkpipe (self->usbdev,
- self->bulk_out_ep),
- patch_chunk, download_amount,
- &actual_len, msecs_to_jiffies (500));
- IRDA_DEBUG (2, "%s(), Sent %u bytes\n", __FUNCTION__,
- actual_len);
- if (retval == 0)
- mdelay(10);
- }
-
- kfree(patch_chunk);
-
- if (i != patch_len) {
- IRDA_ERROR ("%s(), Pushed %d bytes (!= patch_len (%d))\n",
- __FUNCTION__, i, patch_len);
- retval = -EIO;
- }
-
- if (retval < 0)
- /* todo - mark device as not ready */
- IRDA_ERROR ("%s(), STIR421x patch upload failed (%d)\n",
- __FUNCTION__, retval);
-
- return retval;
-}
-
-
-static int stir421x_patch_device(struct irda_usb_cb *self)
-{
- unsigned int i, patch_found = 0, data_found = 0, data_offset;
- int patch_version, ret = 0;
- const struct firmware *fw_entry;
-
- for (i = 0; i < ARRAY_SIZE(stir421x_patches); i++) {
- if(request_firmware(&fw_entry, stir421x_patches[i], &self->usbdev->dev) != 0) {
- IRDA_ERROR( "%s(), Patch %s is not available\n", __FUNCTION__, stir421x_patches[i]);
- continue;
- }
-
- /* We found a patch from userspace */
- patch_version = stir421x_get_patch_version (fw_entry->data, fw_entry->size);
-
- if (patch_version < 0) {
- /* Couldn't fetch a version, let's move on to the next file */
- IRDA_ERROR("%s(), version parsing failed\n", __FUNCTION__);
- ret = patch_version;
- release_firmware(fw_entry);
- continue;
- }
-
- if (patch_version != self->usbdev->descriptor.bcdDevice) {
- /* Patch version and device don't match */
- IRDA_ERROR ("%s(), wrong patch version (%d <-> %d)\n",
- __FUNCTION__,
- patch_version, self->usbdev->descriptor.bcdDevice);
- ret = -EINVAL;
- release_firmware(fw_entry);
- continue;
- }
-
- /* If we're here, we've found a correct patch */
- patch_found = 1;
- break;
-
- }
-
- /* We couldn't find a valid firmware, let's leave */
- if (!patch_found)
- return ret;
-
- /* The actual image starts after the "STMP" keyword */
- for (data_offset = 0; data_offset < STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET; data_offset++) {
- if (!memcmp(fw_entry->data + data_offset,
- STIR421X_PATCH_DATA_TAG_STR,
- sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET))) {
- IRDA_DEBUG(2, "%s(), found patch data for STIR421x at offset %d\n",
- __FUNCTION__, data_offset);
- data_found = 1;
- break;
- }
- }
-
- /* We couldn't find "STMP" from the header */
- if (!data_found)
- return -EINVAL;
-
- /* Let's upload the patch to the target */
- ret = stir421x_upload_patch(self,
- &fw_entry->data[data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)],
- fw_entry->size - (data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)));
-
- release_firmware(fw_entry);
-
- return ret;
-
-}
-
-