From 582e565caeaccf145e2256b84d4fde827fede72e Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Sat, 19 Mar 2011 16:51:43 -0300 Subject: [PATCH] [media] af9015: reimplement firmware download Split FW download packages smarter way and bug free. Implementation is based of Andrea Merello's example he provided for tda18218 driver. Count remaining FW bytes down in loop instead of division and modulo combination used earlier. Thanks-to: Andrea Merello Signed-off-by: Antti Palosaari Cc: Andrea Merello Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-usb/af9015.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c index 0bbc91f..100ebc3 100644 --- a/drivers/media/dvb/dvb-usb/af9015.c +++ b/drivers/media/dvb/dvb-usb/af9015.c @@ -665,9 +665,8 @@ error: static int af9015_download_firmware(struct usb_device *udev, const struct firmware *fw) { - int i, len, packets, remainder, ret; + int i, len, remaining, ret; struct req_t req = {DOWNLOAD_FIRMWARE, 0, 0, 0, 0, 0, NULL}; - u16 addr = 0x5100; /* firmware start address */ u16 checksum = 0; deb_info("%s:\n", __func__); @@ -679,24 +678,20 @@ static int af9015_download_firmware(struct usb_device *udev, af9015_config.firmware_size = fw->size; af9015_config.firmware_checksum = checksum; - #define FW_PACKET_MAX_DATA 55 - - packets = fw->size / FW_PACKET_MAX_DATA; - remainder = fw->size % FW_PACKET_MAX_DATA; - len = FW_PACKET_MAX_DATA; - for (i = 0; i <= packets; i++) { - if (i == packets) /* set size of the last packet */ - len = remainder; + #define FW_ADDR 0x5100 /* firmware start address */ + #define LEN_MAX 55 /* max packet size */ + for (remaining = fw->size; remaining > 0; remaining -= LEN_MAX) { + len = remaining; + if (len > LEN_MAX) + len = LEN_MAX; req.data_len = len; - req.data = (u8 *)(fw->data + i * FW_PACKET_MAX_DATA); - req.addr = addr; - addr += FW_PACKET_MAX_DATA; + req.data = (u8 *) &fw->data[fw->size - remaining]; + req.addr = FW_ADDR + fw->size - remaining; ret = af9015_rw_udev(udev, &req); if (ret) { - err("firmware download failed at packet %d with " \ - "code %d", i, ret); + err("firmware download failed:%d", ret); goto error; } } -- 2.7.4