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usb: ehci: handshake CMD_RUN instead of STS_HALT

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For Aspeed, HCHalted status depends on not only Run/Stop but also
ASS/PSS status.
Handshake CMD_RUN on startup instead.

Tested-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
Link: https://lore.kernel.org/r/20210910073619.26095-1-neal_liu@aspeedtech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Neal Liu 2021-09-10 15:36:19 +08:00 committed by Greg Kroah-Hartman
parent 18d6b39ee8
commit 7f2d73788d
3 changed files with 17 additions and 1 deletions
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11
drivers/usb/host/ehci-hcd.c
View File

@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
/* Wait until HC become operational */
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
msleep(5);
rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
/* For Aspeed, STS_HALT also depends on ASS/PSS status.
* Check CMD_RUN instead.
*/
if (ehci->is_aspeed)
rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
1, 100 * 1000);
else
rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
0, 100 * 1000);
up_write(&ehci_cf_port_reset_rwsem);

6
drivers/usb/host/ehci-platform.c
View File

@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
"has-transaction-translator"))
hcd->has_tt = 1;
if (of_device_is_compatible(dev->dev.of_node,
"aspeed,ast2500-ehci") ||
of_device_is_compatible(dev->dev.of_node,
"aspeed,ast2600-ehci"))
ehci->is_aspeed = 1;
if (soc_device_match(quirk_poll_match))
priv->quirk_poll = true;

1
drivers/usb/host/ehci.h
View File

@ -219,6 +219,7 @@ struct ehci_hcd { /* one per controller */
unsigned need_oc_pp_cycle:1; /* MPC834X port power */
unsigned imx28_write_fix:1; /* For Freescale i.MX28 */
unsigned spurious_oc:1;
unsigned is_aspeed:1;
/* required for usb32 quirk */
#define OHCI_CTRL_HCFS (3 << 6)