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p54usb: utilize usb_reset_device for 3887 

Sometimes on unload or reboot the 3887 USB devices become stuck.
<usual log entry>
kernel: usbcore: registered new interface driver p54usb
kernel: usb 2-10: (p54usb) reset failed! (-110)
kernel: p54usb: probe of 2-10:1.0 failed with error -110
[...]

and a physical unplug and replug was necessary.
However we should be able to do this in software as well,
without any user interaction.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2008-12-26 19:08:31 +01:00 committed by John W. Linville
parent 6b1c7c6760
commit 6982869d99
2 changed files with 58 additions and 13 deletions
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70
drivers/net/wireless/p54/p54usb.c
View File

@ -424,9 +424,44 @@ static int p54u_bulk_msg(struct p54u_priv *priv, unsigned int ep,
data, len, &alen, 2000);
}
static const char p54u_romboot_3887[] = "~~~~";
static const char p54u_firmware_upload_3887[] = "<\r";
static int p54u_device_reset_3887(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
int ret, lock;
u8 buf[4];
ret = lock = usb_lock_device_for_reset(priv->udev, priv->intf);
if (ret < 0) {
dev_err(&priv->udev->dev, "(p54usb) unable to lock device for "
"reset: %d\n", ret);
return ret;
}
ret = usb_reset_device(priv->udev);
if (lock)
usb_unlock_device(priv->udev);
if (ret) {
dev_err(&priv->udev->dev, "(p54usb) unable to reset "
"device: %d\n", ret);
return ret;
}
memcpy(&buf, p54u_romboot_3887, sizeof(buf));
ret = p54u_bulk_msg(priv, P54U_PIPE_DATA,
buf, sizeof(buf));
if (ret)
dev_err(&priv->udev->dev, "(p54usb) unable to jump to "
"boot ROM: %d\n", ret);
return ret;
}
static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
{
static char start_string[] = "~~~~<\r";
struct p54u_priv *priv = dev->priv;
const struct firmware *fw_entry = NULL;
int err, alen;
@ -445,12 +480,9 @@ static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
goto err_bufalloc;
}
memcpy(buf, start_string, 4);
err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 4);
if (err) {
dev_err(&priv->udev->dev, "(p54usb) reset failed! (%d)\n", err);
err = p54u_device_reset_3887(dev);
if (err)
goto err_reset;
}
err = request_firmware(&fw_entry, "isl3887usb", &priv->udev->dev);
if (err) {
@ -467,14 +499,14 @@ static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
goto err_upload_failed;
left = block_size = min((size_t)P54U_FW_BLOCK, fw_entry->size);
strcpy(buf, start_string);
left -= strlen(start_string);
tmp += strlen(start_string);
strcpy(buf, p54u_firmware_upload_3887);
left -= strlen(p54u_firmware_upload_3887);
tmp += strlen(p54u_firmware_upload_3887);
data = fw_entry->data;
remains = fw_entry->size;
hdr = (struct x2_header *)(buf + strlen(start_string));
hdr = (struct x2_header *)(buf + strlen(p54u_firmware_upload_3887));
memcpy(hdr->signature, X2_SIGNATURE, X2_SIGNATURE_SIZE);
hdr->fw_load_addr = cpu_to_le32(ISL38XX_DEV_FIRMWARE_ADDR);
hdr->fw_length = cpu_to_le32(fw_entry->size);
@ -876,6 +908,9 @@ static int __devinit p54u_probe(struct usb_interface *intf,
SET_IEEE80211_DEV(dev, &intf->dev);
usb_set_intfdata(intf, dev);
priv->udev = udev;
priv->intf = intf;
skb_queue_head_init(&priv->rx_queue);
init_usb_anchor(&priv->submitted);
usb_get_dev(udev);
@ -918,9 +953,6 @@ static int __devinit p54u_probe(struct usb_interface *intf,
if (err)
goto err_free_dev;
skb_queue_head_init(&priv->rx_queue);
init_usb_anchor(&priv->submitted);
p54u_open(dev);
err = p54_read_eeprom(dev);
p54u_stop(dev);
@ -958,11 +990,23 @@ static void __devexit p54u_disconnect(struct usb_interface *intf)
ieee80211_free_hw(dev);
}
static int p54u_pre_reset(struct usb_interface *intf)
{
return 0;
}
static int p54u_post_reset(struct usb_interface *intf)
{
return 0;
}
static struct usb_driver p54u_driver = {
.name = "p54usb",
.id_table = p54u_table,
.probe = p54u_probe,
.disconnect = p54u_disconnect,
.pre_reset = p54u_pre_reset,
.post_reset = p54u_post_reset,
};
static int __init p54u_init(void)

1
drivers/net/wireless/p54/p54usb.h
View File

@ -126,6 +126,7 @@ struct p54u_rx_info {
struct p54u_priv {
struct p54_common common;
struct usb_device *udev;
struct usb_interface *intf;
enum {
P54U_NET2280 = 0,
P54U_3887