diff options
Diffstat (limited to 'target/linux/bcm4908/patches-5.4/084-v5.6-0001-phy-usb-EHCI-DMA-may-lose-a-burst-of-DMA-data-for-72.patch')
| -rw-r--r-- | target/linux/bcm4908/patches-5.4/084-v5.6-0001-phy-usb-EHCI-DMA-may-lose-a-burst-of-DMA-data-for-72.patch | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/target/linux/bcm4908/patches-5.4/084-v5.6-0001-phy-usb-EHCI-DMA-may-lose-a-burst-of-DMA-data-for-72.patch b/target/linux/bcm4908/patches-5.4/084-v5.6-0001-phy-usb-EHCI-DMA-may-lose-a-burst-of-DMA-data-for-72.patch deleted file mode 100644 index ac368d5dd1..0000000000 --- a/target/linux/bcm4908/patches-5.4/084-v5.6-0001-phy-usb-EHCI-DMA-may-lose-a-burst-of-DMA-data-for-72.patch +++ /dev/null @@ -1,61 +0,0 @@ -From dc9aa43c43668481089c48135707ec3f8f5b2e19 Mon Sep 17 00:00:00 2001 -From: Al Cooper <alcooperx@gmail.com> -Date: Fri, 3 Jan 2020 13:17:59 -0500 -Subject: [PATCH] phy: usb: EHCI DMA may lose a burst of DMA data for 7255xA0 - family - -When the EHCI controller received a 512 byte USB packet that -had to be broken into 2 256 byte bursts across the SCB bus AND -there was a following 512 byte USB packet, the second burst of -data from the first packet was sometimes being lost. If the -burst size was changed to 128 bytes via the EBR_SCB_SIZE field -in the USB_CTRL_EBRIDGE register we'd see the 4th 128 byte burst -of the first packet being lost. This problem became much worse -if other threads were running that accessed memory, like a memcpy -test. Setting the EBR_SCB_SIZE to 512, which prevents breaking -the EHCI USB packet (max size of 512 bytes) into bursts, fixed -the problem. - -Signed-off-by: Al Cooper <alcooperx@gmail.com> -Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> ---- - drivers/phy/broadcom/phy-brcm-usb-init.c | 13 +++++++++++++ - 1 file changed, 13 insertions(+) - ---- a/drivers/phy/broadcom/phy-brcm-usb-init.c -+++ b/drivers/phy/broadcom/phy-brcm-usb-init.c -@@ -42,6 +42,7 @@ - #define USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK 0x80000000 /* option */ - #define USB_CTRL_EBRIDGE 0x0c - #define USB_CTRL_EBRIDGE_ESTOP_SCB_REQ_MASK 0x00020000 /* option */ -+#define USB_CTRL_EBRIDGE_EBR_SCB_SIZE_MASK 0x00000f80 /* option */ - #define USB_CTRL_OBRIDGE 0x10 - #define USB_CTRL_OBRIDGE_LS_KEEP_ALIVE_MASK 0x08000000 - #define USB_CTRL_MDIO 0x14 -@@ -176,6 +177,7 @@ static const struct id_to_type id_to_typ - { 0x33900000, BRCM_FAMILY_3390A0 }, - { 0x72500010, BRCM_FAMILY_7250B0 }, - { 0x72600000, BRCM_FAMILY_7260A0 }, -+ { 0x72550000, BRCM_FAMILY_7260A0 }, - { 0x72680000, BRCM_FAMILY_7271A0 }, - { 0x72710000, BRCM_FAMILY_7271A0 }, - { 0x73640000, BRCM_FAMILY_7364A0 }, -@@ -948,6 +950,17 @@ void brcm_usb_init_eohci(struct brcm_usb - if (params->selected_family == BRCM_FAMILY_7271A0) - /* Enable LS keep alive fix for certain keyboards */ - USB_CTRL_SET(ctrl, OBRIDGE, LS_KEEP_ALIVE); -+ -+ if (params->family_id == 0x72550000) { -+ /* -+ * Make the burst size 512 bytes to fix a hardware bug -+ * on the 7255a0. See HW7255-24. -+ */ -+ reg = brcmusb_readl(USB_CTRL_REG(ctrl, EBRIDGE)); -+ reg &= ~USB_CTRL_MASK(EBRIDGE, EBR_SCB_SIZE); -+ reg |= 0x800; -+ brcmusb_writel(reg, USB_CTRL_REG(ctrl, EBRIDGE)); -+ } - } - - void brcm_usb_init_xhci(struct brcm_usb_init_params *params) |