Input: atmel_mxt_ts - implement bootloader frame retries
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk> Acked-by: Benson Leung <bleung@chromium.org> Acked-by: Yufeng Shen <miletus@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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@ -510,8 +510,12 @@ recheck:
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val &= ~MXT_BOOT_STATUS_MASK;
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break;
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case MXT_FRAME_CRC_PASS:
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if (val == MXT_FRAME_CRC_CHECK)
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if (val == MXT_FRAME_CRC_CHECK) {
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goto recheck;
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} else if (val == MXT_FRAME_CRC_FAIL) {
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dev_err(dev, "Bootloader CRC fail\n");
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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@ -1187,6 +1191,7 @@ static int mxt_load_fw(struct device *dev, const char *fn)
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const struct firmware *fw = NULL;
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unsigned int frame_size;
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unsigned int pos = 0;
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unsigned int retry = 0;
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int ret;
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ret = request_firmware(&fw, fn, dev);
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@ -1224,9 +1229,7 @@ static int mxt_load_fw(struct device *dev, const char *fn)
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frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
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/* We should add 2 at frame size as the the firmware data is not
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* included the CRC bytes.
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*/
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/* Take account of CRC bytes */
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frame_size += 2;
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/* Write one frame to device */
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@ -1235,10 +1238,20 @@ static int mxt_load_fw(struct device *dev, const char *fn)
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goto disable_irq;
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ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
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if (ret)
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goto disable_irq;
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if (ret) {
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retry++;
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pos += frame_size;
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/* Back off by 20ms per retry */
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msleep(retry * 20);
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if (retry > 20) {
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dev_err(dev, "Retry count exceeded\n");
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goto disable_irq;
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}
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} else {
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retry = 0;
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pos += frame_size;
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}
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dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
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}
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