diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2011-11-17 22:14:43 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-11-22 01:20:45 +0400 |
| commit | ff6ff96b5ba5b39f7ab3d8ea0cf9ec414452ac92 (patch) | |
| tree | ad1c3294691a2860f9b8205ece269a1b36ac2f77 /drivers/net/wireless/rtlwifi/usb.c | |
| parent | 040a72785cf19fd8032f24d584ee305158c87ac7 (diff) | |
| download | linux-ff6ff96b5ba5b39f7ab3d8ea0cf9ec414452ac92.tar.xz | |
rtlwifi: rtl8192cu: Change firmware upload to use block writes
Driver rtl8192cu writes the firmware with 32-bit asynchronous writes. This
design is OK for USB 2.0 adapters, but the current implementation of
xhcu-hcd has a limited ring size, which is exceeded. By converting to
synchronous block writes, this error is avoided.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rtlwifi/usb.c')
| -rw-r--r-- | drivers/net/wireless/rtlwifi/usb.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c index 209105c8e3dc..a461822c05b3 100644 --- a/drivers/net/wireless/rtlwifi/usb.c +++ b/drivers/net/wireless/rtlwifi/usb.c @@ -40,7 +40,6 @@ #define REALTEK_USB_VENQT_CMD_REQ 0x05 #define REALTEK_USB_VENQT_CMD_IDX 0x00 -#define REALTEK_USB_VENQT_MAX_BUF_SIZE 254 #define MAX_USBCTRL_VENDORREQ_TIMES 10 static void usbctrl_async_callback(struct urb *urb) @@ -203,6 +202,30 @@ static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) _usb_write_async(to_usb_device(dev), addr, val, 4); } +static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data, + u16 len) +{ + struct device *dev = rtlpriv->io.dev; + struct usb_device *udev = to_usb_device(dev); + u8 request = REALTEK_USB_VENQT_CMD_REQ; + u8 reqtype = REALTEK_USB_VENQT_WRITE; + u16 wvalue; + u16 index = REALTEK_USB_VENQT_CMD_IDX; + int pipe = usb_sndctrlpipe(udev, 0); /* write_out */ + u8 *buffer; + dma_addr_t dma_addr; + + wvalue = (u16)(addr&0x0000ffff); + buffer = usb_alloc_coherent(udev, (size_t)len, GFP_ATOMIC, &dma_addr); + if (!buffer) + return; + memcpy(buffer, data, len); + usb_control_msg(udev, pipe, request, reqtype, wvalue, + index, buffer, len, 50); + + usb_free_coherent(udev, (size_t)len, buffer, dma_addr); +} + static void _rtl_usb_io_handler_init(struct device *dev, struct ieee80211_hw *hw) { @@ -216,6 +239,7 @@ static void _rtl_usb_io_handler_init(struct device *dev, rtlpriv->io.read8_sync = _usb_read8_sync; rtlpriv->io.read16_sync = _usb_read16_sync; rtlpriv->io.read32_sync = _usb_read32_sync; + rtlpriv->io.writeN_sync = _usb_writeN_sync; } static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) |