From patchwork Sat Mar 21 08:51:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 244040 List-Id: U-Boot discussion From: chunfeng.yun at mediatek.com (Chunfeng Yun) Date: Sat, 21 Mar 2020 16:51:52 +0800 Subject: [PATCH v2 07/10] xhci: mediatek: Add support for MTK xHCI host controller In-Reply-To: <1584780715-29632-1-git-send-email-chunfeng.yun@mediatek.com> References: <1584780715-29632-1-git-send-email-chunfeng.yun@mediatek.com> Message-ID: <1584780715-29632-8-git-send-email-chunfeng.yun@mediatek.com> This patch is used to support the on-chip xHCI controller on MediaTek SoCs, currently only control/bulk transfers are supported. Signed-off-by: Chunfeng Yun --- v2: 1. use clk_bulk to get clocks suggested by Marek 2. use clrsetbits_le32() etc suggeseted by Marek --- drivers/usb/host/Kconfig | 6 + drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-mtk.c | 402 ++++++++++++++++++++++++++++++++++++ 3 files changed, 409 insertions(+) create mode 100644 drivers/usb/host/xhci-mtk.c diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 0987ff25b1..931af268f4 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -30,6 +30,12 @@ config USB_XHCI_DWC3_OF_SIMPLE Support USB2/3 functionality in simple SoC integrations with USB controller based on the DesignWare USB3 IP Core. +config USB_XHCI_MTK + bool "Support for MediaTek on-chip xHCI USB controller" + depends on ARCH_MEDIATEK + help + Enables support for the on-chip xHCI controller on MediaTek SoCs. + config USB_XHCI_MVEBU bool "MVEBU USB 3.0 support" default y diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 7feeff679c..104821f188 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_USB_XHCI_DWC3_OF_SIMPLE) += dwc3-of-simple.o obj-$(CONFIG_USB_XHCI_ROCKCHIP) += xhci-rockchip.o obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o obj-$(CONFIG_USB_XHCI_FSL) += xhci-fsl.o +obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o obj-$(CONFIG_USB_XHCI_MVEBU) += xhci-mvebu.o obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c new file mode 100644 index 0000000000..d59911a34e --- /dev/null +++ b/drivers/usb/host/xhci-mtk.c @@ -0,0 +1,402 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 MediaTek, Inc. + * Authors: Chunfeng Yun + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define MU3C_U3_PORT_MAX 4 +#define MU3C_U2_PORT_MAX 5 + +/** + * struct mtk_ippc_regs: MTK ssusb ip port control registers + * @ip_pw_ctr0~3: ip power and clock control registers + * @ip_pw_sts1~2: ip power and clock status registers + * @ip_xhci_cap: ip xHCI capability register + * @u3_ctrl_p[x]: ip usb3 port x control register, only low 4bytes are used + * @u2_ctrl_p[x]: ip usb2 port x control register, only low 4bytes are used + * @u2_phy_pll: usb2 phy pll control register + */ +struct mtk_ippc_regs { + __le32 ip_pw_ctr0; + __le32 ip_pw_ctr1; + __le32 ip_pw_ctr2; + __le32 ip_pw_ctr3; + __le32 ip_pw_sts1; + __le32 ip_pw_sts2; + __le32 reserved0[3]; + __le32 ip_xhci_cap; + __le32 reserved1[2]; + __le64 u3_ctrl_p[MU3C_U3_PORT_MAX]; + __le64 u2_ctrl_p[MU3C_U2_PORT_MAX]; + __le32 reserved2; + __le32 u2_phy_pll; + __le32 reserved3[33]; /* 0x80 ~ 0xff */ +}; + +/* ip_pw_ctrl0 register */ +#define CTRL0_IP_SW_RST BIT(0) + +/* ip_pw_ctrl1 register */ +#define CTRL1_IP_HOST_PDN BIT(0) + +/* ip_pw_ctrl2 register */ +#define CTRL2_IP_DEV_PDN BIT(0) + +/* ip_pw_sts1 register */ +#define STS1_IP_SLEEP_STS BIT(30) +#define STS1_U3_MAC_RST BIT(16) +#define STS1_XHCI_RST BIT(11) +#define STS1_SYS125_RST BIT(10) +#define STS1_REF_RST BIT(8) +#define STS1_SYSPLL_STABLE BIT(0) + +/* ip_xhci_cap register */ +#define CAP_U3_PORT_NUM(p) ((p) & 0xff) +#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff) + +/* u3_ctrl_p register */ +#define CTRL_U3_PORT_HOST_SEL BIT(2) +#define CTRL_U3_PORT_PDN BIT(1) +#define CTRL_U3_PORT_DIS BIT(0) + +/* u2_ctrl_p register */ +#define CTRL_U2_PORT_HOST_SEL BIT(2) +#define CTRL_U2_PORT_PDN BIT(1) +#define CTRL_U2_PORT_DIS BIT(0) + +struct mtk_xhci { + struct xhci_ctrl ctrl; /* Needs to come first in this struct! */ + struct xhci_hccr *hcd; + struct mtk_ippc_regs *ippc; + struct udevice *dev; + struct udevice *vusb33_supply; + struct udevice *vbus_supply; + struct clk_bulk clks; + int num_u2_ports; + int num_u3_ports; + struct phy *phys; + int num_phys; +}; + +static int xhci_mtk_host_enable(struct mtk_xhci *mtk) +{ + struct mtk_ippc_regs *ippc = mtk->ippc; + u32 value, check_val; + int ret; + int i; + + /* power on host ip */ + clrbits_le32(&ippc->ip_pw_ctr1, CTRL1_IP_HOST_PDN); + + /* power on and enable all u3 ports */ + for (i = 0; i < mtk->num_u3_ports; i++) { + clrsetbits_le32(&ippc->u3_ctrl_p[i], + CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS, + CTRL_U3_PORT_HOST_SEL); + } + + /* power on and enable all u2 ports */ + for (i = 0; i < mtk->num_u2_ports; i++) { + clrsetbits_le32(&ippc->u2_ctrl_p[i], + CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS, + CTRL_U2_PORT_HOST_SEL); + } + + /* + * wait for clocks to be stable, and clock domains reset to + * be inactive after power on and enable ports + */ + check_val = STS1_SYSPLL_STABLE | STS1_REF_RST | + STS1_SYS125_RST | STS1_XHCI_RST; + + if (mtk->num_u3_ports) + check_val |= STS1_U3_MAC_RST; + + ret = readl_poll_timeout(&ippc->ip_pw_sts1, value, + (check_val == (value & check_val)), 20000); + if (ret) { + dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value); + return ret; + } + + return 0; +} + +static int xhci_mtk_host_disable(struct mtk_xhci *mtk) +{ + struct mtk_ippc_regs *ippc = mtk->ippc; + int i; + + /* power down all u3 ports */ + for (i = 0; i < mtk->num_u3_ports; i++) + setbits_le32(&ippc->u3_ctrl_p[i], CTRL_U3_PORT_PDN); + + /* power down all u2 ports */ + for (i = 0; i < mtk->num_u2_ports; i++) + setbits_le32(&ippc->u2_ctrl_p[i], CTRL_U2_PORT_PDN); + + /* power down host ip */ + setbits_le32(&ippc->ip_pw_ctr1, CTRL1_IP_HOST_PDN); + + return 0; +} + +static int xhci_mtk_ssusb_init(struct mtk_xhci *mtk) +{ + struct mtk_ippc_regs *ippc = mtk->ippc; + u32 value; + + /* reset whole ip */ + setbits_le32(&ippc->ip_pw_ctr0, CTRL0_IP_SW_RST); + udelay(1); + clrbits_le32(&ippc->ip_pw_ctr0, CTRL0_IP_SW_RST); + + value = readl(&ippc->ip_xhci_cap); + mtk->num_u3_ports = CAP_U3_PORT_NUM(value); + mtk->num_u2_ports = CAP_U2_PORT_NUM(value); + dev_info(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__, + mtk->num_u2_ports, mtk->num_u3_ports); + + return xhci_mtk_host_enable(mtk); +} + +static int xhci_mtk_ofdata_get(struct mtk_xhci *mtk) +{ + struct udevice *dev = mtk->dev; + fdt_addr_t reg_base; + int ret = 0; + + reg_base = devfdt_get_addr_name(dev, "mac"); + if (reg_base == FDT_ADDR_T_NONE) { + pr_err("Failed to get xHCI base address\n"); + return -ENXIO; + } + + mtk->hcd = (struct xhci_hccr *)reg_base; + + reg_base = devfdt_get_addr_name(dev, "ippc"); + if (reg_base == FDT_ADDR_T_NONE) { + pr_err("Failed to get IPPC base address\n"); + return -ENXIO; + } + + mtk->ippc = (struct mtk_ippc_regs *)reg_base; + + dev_info(dev, "hcd: 0x%x, ippc: 0x%x\n", + (int)mtk->hcd, (int)mtk->ippc); + + ret = clk_get_bulk(dev, &mtk->clks); + if (ret) { + dev_err(dev, "Failed to get clocks\n"); + return ret; + } + + ret = device_get_supply_regulator(dev, "vusb33-supply", + &mtk->vusb33_supply); + if (ret) + debug("Can't get vusb33 regulator! %d\n", ret); + + ret = device_get_supply_regulator(dev, "vbus-supply", + &mtk->vbus_supply); + if (ret) + debug("Can't get vbus regulator! %d\n", ret); + + return 0; +} + +static int xhci_mtk_ldos_enable(struct mtk_xhci *mtk) +{ + int ret; + + ret = regulator_set_enable(mtk->vusb33_supply, true); + if (ret < 0 && ret != -ENOSYS) { + dev_err(mtk->dev, "failed to enable vusb33\n"); + return ret; + } + + ret = regulator_set_enable(mtk->vbus_supply, true); + if (ret < 0 && ret != -ENOSYS) { + dev_err(mtk->dev, "failed to enable vbus\n"); + regulator_set_enable(mtk->vusb33_supply, false); + return ret; + } + + return 0; +} + +static void xhci_mtk_ldos_disable(struct mtk_xhci *mtk) +{ + regulator_set_enable(mtk->vbus_supply, false); + regulator_set_enable(mtk->vusb33_supply, false); +} + +int xhci_mtk_phy_setup(struct mtk_xhci *mtk) +{ + struct udevice *dev = mtk->dev; + struct phy *usb_phys; + int i, ret, count; + + /* Return if no phy declared */ + if (!dev_read_prop(dev, "phys", NULL)) + return 0; + + count = dev_count_phandle_with_args(dev, "phys", "#phy-cells"); + if (count <= 0) + return count; + + usb_phys = devm_kcalloc(dev, count, sizeof(*usb_phys), GFP_KERNEL); + if (!usb_phys) + return -ENOMEM; + + for (i = 0; i < count; i++) { + ret = generic_phy_get_by_index(dev, i, &usb_phys[i]); + if (ret && ret != -ENOENT) { + dev_err(dev, "Failed to get USB PHY%d for %s\n", + i, dev->name); + return ret; + } + } + + for (i = 0; i < count; i++) { + ret = generic_phy_init(&usb_phys[i]); + if (ret) { + dev_err(dev, "Can't init USB PHY%d for %s\n", + i, dev->name); + goto phys_init_err; + } + } + + for (i = 0; i < count; i++) { + ret = generic_phy_power_on(&usb_phys[i]); + if (ret) { + dev_err(dev, "Can't power USB PHY%d for %s\n", + i, dev->name); + goto phys_poweron_err; + } + } + + mtk->phys = usb_phys; + mtk->num_phys = count; + + return 0; + +phys_poweron_err: + for (i = count - 1; i >= 0; i--) + generic_phy_power_off(&usb_phys[i]); + + for (i = 0; i < count; i++) + generic_phy_exit(&usb_phys[i]); + + return ret; + +phys_init_err: + for (; i >= 0; i--) + generic_phy_exit(&usb_phys[i]); + + return ret; +} + +void xhci_mtk_phy_shutdown(struct mtk_xhci *mtk) +{ + struct udevice *dev = mtk->dev; + struct phy *usb_phys; + int i, ret; + + usb_phys = mtk->phys; + for (i = 0; i < mtk->num_phys; i++) { + if (!generic_phy_valid(&usb_phys[i])) + continue; + + ret = generic_phy_power_off(&usb_phys[i]); + ret |= generic_phy_exit(&usb_phys[i]); + if (ret) { + dev_err(dev, "Can't shutdown USB PHY%d for %s\n", + i, dev->name); + } + } +} + +static int xhci_mtk_probe(struct udevice *dev) +{ + struct mtk_xhci *mtk = dev_get_priv(dev); + struct xhci_hcor *hcor; + int ret; + + mtk->dev = dev; + ret = xhci_mtk_ofdata_get(mtk); + if (ret) + return ret; + + ret = xhci_mtk_ldos_enable(mtk); + if (ret) + goto ldos_err; + + ret = clk_enable_bulk(&mtk->clks); + if (ret) + goto clks_err; + + ret = xhci_mtk_phy_setup(mtk); + if (ret) + goto phys_err; + + ret = xhci_mtk_ssusb_init(mtk); + if (ret) + goto ssusb_init_err; + + hcor = (struct xhci_hcor *)((uintptr_t)mtk->hcd + + HC_LENGTH(xhci_readl(&mtk->hcd->cr_capbase))); + + return xhci_register(dev, mtk->hcd, hcor); + +ssusb_init_err: + xhci_mtk_phy_shutdown(mtk); +phys_err: + clk_disable_bulk(&mtk->clks); +clks_err: + xhci_mtk_ldos_disable(mtk); +ldos_err: + return ret; +} + +static int xhci_mtk_remove(struct udevice *dev) +{ + struct mtk_xhci *mtk = dev_get_priv(dev); + + xhci_deregister(dev); + xhci_mtk_host_disable(mtk); + xhci_mtk_ldos_disable(mtk); + clk_disable_bulk(&mtk->clks); + + return 0; +} + +static const struct udevice_id xhci_mtk_ids[] = { + { .compatible = "mediatek,mtk-xhci" }, + { } +}; + +U_BOOT_DRIVER(usb_xhci) = { + .name = "xhci-mtk", + .id = UCLASS_USB, + .of_match = xhci_mtk_ids, + .probe = xhci_mtk_probe, + .remove = xhci_mtk_remove, + .ops = &xhci_usb_ops, + .bind = dm_scan_fdt_dev, + .priv_auto_alloc_size = sizeof(struct mtk_xhci), + .flags = DM_FLAG_ALLOC_PRIV_DMA, +};