usb: PS3 EHCI HC reset work-around (9187bef2) · Commits · 戴 / test

drivers/usb/host/ehci-ps3.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,34 @@
		#include <asm/firmware.h>
		#include <asm/ps3.h>

		static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
		{
		/* PS3 HC internal setup register offsets. */

		enum ps3_ehci_hc_insnreg {
		ps3_ehci_hc_insnreg01 = 0x084,
		ps3_ehci_hc_insnreg02 = 0x088,
		ps3_ehci_hc_insnreg03 = 0x08c,
		};

		/* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
		* internal INSNREGXX setup regs back to the chip default values
		* on Host Controller Reset (CMD_RESET) or Light Host Controller
		* Reset (CMD_LRESET). The work-around for this is for the HC
		* driver to re-initialise these regs when ever the HC is reset.
		*/

		/* Set burst transfer counts to 256 out, 32 in. */

		writel_be(0x01000020, (void __iomem *)ehci->regs +
		ps3_ehci_hc_insnreg01);

		/* Enable burst transfer counts. */

		writel_be(0x00000001, (void __iomem *)ehci->regs +
		ps3_ehci_hc_insnreg03);
		}

		static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
		{
		int result;
		@@ -49,6 +77,8 @@ static int ps3_ehci_hc_reset(struct usb_hcd *hcd)

		ehci_reset(ehci);

		ps3_ehci_setup_insnreg(ehci);

		return result;
		}