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usb: musb: Fix fifo reads for dm816x with musb_dsps

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Looks like dm81xx can only do 32-bit fifo reads like am35x. Let's set
up musb-dsps with a custom read_fifo function based on the compatible
flag.

Otherwise we can get the following errors when starting dhclient on a
asix USB Ethernet adapter:

asix 2-1:1.0 eth2: asix_rx_fixup() Bad Header Length 0xffff003c, offset 4

While at it, let's also remove pointless cast of the driver data.

Cc: Bin Liu <binmlist@gmail.com>
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: George Cherian <george.cherian@ti.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Tony Lindgren 2015-03-19 17:10:16 -07:00 committed by Felipe Balbi
parent 1ea276cbfc
commit 3e457371f4
1 changed files with 24 additions and 1 deletions
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25
drivers/usb/musb/musb_dsps.c
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@ -615,6 +615,24 @@ static int dsps_musb_recover(struct musb *musb)
return session_restart ? 0 : -EPIPE;
}
/* Similar to am35x, dm81xx support only 32-bit read operation */
static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
{
void __iomem *fifo = hw_ep->fifo;
if (len >= 4) {
readsl(fifo, dst, len >> 2);
dst += len & ~0x03;
len &= 0x03;
}
/* Read any remaining 1 to 3 bytes */
if (len > 0) {
u32 val = musb_readl(fifo, 0);
memcpy(dst, &val, len);
}
}
static struct musb_platform_ops dsps_ops = {
.quirks = MUSB_INDEXED_EP,
.init = dsps_musb_init,
@ -761,6 +779,9 @@ static int dsps_probe(struct platform_device *pdev)
}
wrp = match->data;
if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816"))
dsps_ops.read_fifo = dsps_read_fifo32;
/* allocate glue */
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
@ -837,7 +858,9 @@ static const struct dsps_musb_wrapper am33xx_driver_data = {
static const struct of_device_id musb_dsps_of_match[] = {
{ .compatible = "ti,musb-am33xx",
.data = (void *) &am33xx_driver_data, },
.data = &am33xx_driver_data, },
{ .compatible = "ti,musb-dm816",
.data = &am33xx_driver_data, },
{ },
};
MODULE_DEVICE_TABLE(of, musb_dsps_of_match);