From: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com
Add a USB controller driver for the EHCI block in R8A7795/R8A7796 SoC. This is a stopgap measure until we have proper DT support, clock and reset framework in place, at which point we can switch to ehci-generic.
Signed-off-by: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Hiroyuki Yokoyama hiroyuki.yokoyama.vx@renesas.com Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-rcar_gen3.c | 106 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 drivers/usb/host/ehci-rcar_gen3.c
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index fb5aa6f889..18971acf54 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -130,6 +130,14 @@ config USB_EHCI_MSM This driver supports combination of Chipidea USB controller and Synapsys USB PHY in host mode only.
+config USB_EHCI_RCAR_GEN3 + bool "Support for Renesas RCar M3/H3 EHCI USB controller" + depends on RCAR_GEN3 + default y + ---help--- + Enables support for the on-chip EHCI controller on Renesas + R8A7795 and R8A7796 SoCs. + config USB_EHCI_ZYNQ bool "Support for Xilinx Zynq on-chip EHCI USB controller" depends on ARCH_ZYNQ diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 58c0cf54c2..5d481757e5 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o obj-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o obj-$(CONFIG_USB_EHCI_VF) += ehci-vf.o obj-$(CONFIG_USB_EHCI_RMOBILE) += ehci-rmobile.o +obj-$(CONFIG_USB_EHCI_RCAR_GEN3) += ehci-rcar_gen3.o obj-$(CONFIG_USB_EHCI_ZYNQ) += ehci-zynq.o
# xhci diff --git a/drivers/usb/host/ehci-rcar_gen3.c b/drivers/usb/host/ehci-rcar_gen3.c new file mode 100644 index 0000000000..525e7f3573 --- /dev/null +++ b/drivers/usb/host/ehci-rcar_gen3.c @@ -0,0 +1,106 @@ +/* + * drivers/usb/host/ehci-rcar_gen3. + * This file is EHCI HCD (Host Controller Driver) for USB. + * + * Copyright (C) 2015-2017 Renesas Electronics Corporation + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <wait_bit.h> +#include <asm/io.h> +#include <usb/ehci-ci.h> +#include "ehci.h" + +#define RCAR_GEN3_USB_BASE(n) (0xEE080000 + ((n) * 0x20000)) + +#define EHCI_USBCMD 0x120 + +#define CORE_SPD_RSM_TIMSET 0x30c +#define CORE_OC_TIMSET 0x310 + +/* Register offset */ +#define AHB_OFFSET 0x200 + +#define BASE_HSUSB 0xE6590000 +#define REG_LPSTS (BASE_HSUSB + 0x0102) /* 16bit */ +#define SUSPM 0x4000 +#define SUSPM_NORMAL BIT(14) +#define REG_UGCTRL2 (BASE_HSUSB + 0x0184) /* 32bit */ +#define USB0SEL 0x00000030 +#define USB0SEL_EHCI 0x00000010 + +#define SMSTPCR7 0xE615014C +#define SMSTPCR700 BIT(0) /* EHCI3 */ +#define SMSTPCR701 BIT(1) /* EHCI2 */ +#define SMSTPCR702 BIT(2) /* EHCI1 */ +#define SMSTPCR703 BIT(3) /* EHCI0 */ +#define SMSTPCR704 BIT(4) /* HSUSB */ + +#define AHB_PLL_RST BIT(1) + +#define USBH_INTBEN BIT(2) +#define USBH_INTAEN BIT(1) + +#define AHB_INT_ENABLE 0x200 +#define AHB_USBCTR 0x20c + +int ehci_hcd_stop(int index) +{ +#if defined(CONFIG_R8A7795) + const u32 mask = SMSTPCR703 | SMSTPCR702 | SMSTPCR701 | SMSTPCR700; +#else + const u32 mask = SMSTPCR703 | SMSTPCR702; +#endif + const u32 base = RCAR_GEN3_USB_BASE(index); + int ret; + + /* Reset EHCI */ + setbits_le32((uintptr_t)(base + EHCI_USBCMD), CMD_RESET); + ret = wait_for_bit("ehci-rcar", (void *)(uintptr_t)base + EHCI_USBCMD, + CMD_RESET, false, 10, true); + if (ret) { + printf("ehci-rcar: reset failed (index=%i, ret=%i).\n", + index, ret); + } + + setbits_le32(SMSTPCR7, BIT(3 - index)); + + if ((readl(SMSTPCR7) & mask) == mask) + setbits_le32(SMSTPCR7, SMSTPCR704); + + return 0; +} + +int ehci_hcd_init(int index, enum usb_init_type init, + struct ehci_hccr **hccr, struct ehci_hcor **hcor) +{ + const void __iomem *base = + (void __iomem *)(uintptr_t)RCAR_GEN3_USB_BASE(index); + struct usb_ehci *ehci = (struct usb_ehci *)(uintptr_t)base; + + clrbits_le32(SMSTPCR7, BIT(3 - index)); + clrbits_le32(SMSTPCR7, SMSTPCR704); + + *hccr = (struct ehci_hccr *)((uintptr_t)&ehci->caplength); + *hcor = (struct ehci_hcor *)((uintptr_t)*hccr + + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); + + /* Enable interrupt */ + setbits_le32(base + AHB_INT_ENABLE, USBH_INTBEN | USBH_INTAEN); + writel(0x014e029b, base + CORE_SPD_RSM_TIMSET); + writel(0x000209ab, base + CORE_OC_TIMSET); + + /* Choice USB0SEL */ + clrsetbits_le32(REG_UGCTRL2, USB0SEL, USB0SEL_EHCI); + + /* Clock & Reset */ + clrbits_le32(base + AHB_USBCTR, AHB_PLL_RST); + + /* low power status */ + clrsetbits_le16(REG_LPSTS, SUSPM, SUSPM_NORMAL); + + return 0; +}