Add support for the on-chip XHCI host controller present on NVIDIA Tegra114 and later SoCs. The driver is currently very basic: it loads the controller with its firmware, starts the controller, and is able to service messages sent by the controller's firmware. The hardware supports device mode as well as runtime power-gating, but support for these is not yet implemented here. Based on work by: Ajay Gupta <ajayg@xxxxxxxxxx> Bharath Yadav <byadav@xxxxxxxxxx> Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx> --- .../devicetree/bindings/usb/nvidia,tegra-xhci.txt | 42 ++ drivers/usb/host/Kconfig | 12 + drivers/usb/host/Makefile | 2 + drivers/usb/host/xhci-tegra.c | 796 +++++++++++++++++++++ drivers/usb/host/xhci-tegra.h | 131 ++++ include/linux/usb/tegra_xusb.h | 66 ++ 6 files changed, 1049 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/nvidia,tegra-xhci.txt create mode 100644 drivers/usb/host/xhci-tegra.c create mode 100644 drivers/usb/host/xhci-tegra.h create mode 100644 include/linux/usb/tegra_xusb.h diff --git a/Documentation/devicetree/bindings/usb/nvidia,tegra-xhci.txt b/Documentation/devicetree/bindings/usb/nvidia,tegra-xhci.txt new file mode 100644 index 0000000..6d94bd6 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/nvidia,tegra-xhci.txt @@ -0,0 +1,42 @@ +NVIDIA Tegra XHCI controller + +The device node for the Tegra XHCI host controller present on Tegra114 and +later SoCs. + +Required properties: + - compatible: Should be "nvidia,tegra114-xhci" or "nvidia,tegra124-xhci". + - reg: Address and length of the register sets. There should be three + entries in the following order: XHCI host registers, FPCI registers, and + IPFS registers. + - interrupts: Interrupts used by the controller. There should be two + entries in the following order: XHCI host interrupt and firmware mailbox + interrupt. + - clocks: Handles to XUSB host and falcon clocks. + - clock-names: Should be "xusb_host" and "xusb_falcon_src", respecitively. + - resets: Handle to XUSB host reset. + - reset-names: Should be "xusb_host". + - phys: Handle to the XUSB PHY. + - phy-names: Should be "xusb". + - s1p05v-supply: 1.05V supply regulator. + - s1p8v-supply: 1.8V supply regulator. + - s3p3v-supply: 3.3V supply regulator. + +Example: + usb@0,70090000 { + compatible = "nvidia,tegra114-xhci", "nvidia,tegra124-xhci"; + reg = <0x0 0x70090000 0x0 0x8000>, + <0x0 0x70098000 0x0 0x1000>, + <0x0 0x70099000 0x0 0x1000>; + interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&tegra_car TEGRA124_CLK_XUSB_HOST>, + <&tegra_car TEGRA124_CLK_XUSB_FALCON_SRC>; + clock-names = "xusb_host", "xusb_falcon_src"; + resets = <&tegra_car 89>; + reset-names = "xusb_host"; + phy = <&xusb_phy>; + phy-names = "xusb"; + s1p05v-supply = <&vdd_1v05_run>; + s3p3v-supply = <&vdd_3v3_lp0>; + s1p8v-supply = <&vddio_1v8>; + }; diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 3d9e540..43f7977 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -29,6 +29,18 @@ if USB_XHCI_HCD config USB_XHCI_PLATFORM tristate +config USB_XHCI_TEGRA + tristate "Support for NVIDIA Tegra XHCI host controller" + depends on ARCH_TEGRA + select USB_XHCI_PLATFORM + select PHY_TEGRA_XUSB + select FW_LOADER + ---help--- + Enables support for the on-chip XHCI controller present on NVIDIA + Tegra114 and later SoCs. + + If unsure, say N. + endif # USB_XHCI_HCD config USB_EHCI_HCD diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 7530468..5941d36 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -38,6 +38,8 @@ obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o obj-$(CONFIG_USB_W90X900_EHCI) += ehci-w90x900.o +obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o + obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c new file mode 100644 index 0000000..5c705b7 --- /dev/null +++ b/drivers/usb/host/xhci-tegra.c @@ -0,0 +1,796 @@ +/* + * NVIDIA Tegra XHCI host controller driver + * + * Copyright (C) 2014 NVIDIA Corporation + * Copyright (C) 2014 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/of_device.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/reset.h> +#include <linux/usb/tegra_xusb.h> + +#include "xhci-tegra.h" + +struct tegra_xhci_fw_cfgtbl { + u32 boot_loadaddr_in_imem; + u32 boot_codedfi_offset; + u32 boot_codetag; + u32 boot_codesize; + u32 phys_memaddr; + u16 reqphys_memsize; + u16 alloc_phys_memsize; + u32 rodata_img_offset; + u32 rodata_section_start; + u32 rodata_section_end; + u32 main_fnaddr; + u32 fwimg_cksum; + u32 fwimg_created_time; + u32 imem_resident_start; + u32 imem_resident_end; + u32 idirect_start; + u32 idirect_end; + u32 l2_imem_start; + u32 l2_imem_end; + u32 version_id; + u8 init_ddirect; + u8 reserved[3]; + u32 phys_addr_log_buffer; + u32 total_log_entries; + u32 dequeue_ptr; + u32 dummy_var[2]; + u32 fwimg_len; + u8 magic[8]; + u32 ss_low_power_entry_timeout; + u8 num_hsic_port; + u8 padding[139]; /* Padding bytes to make 256-bytes cfgtbl */ +}; + +struct tegra_xhci_soc_config { + const char *firmware_file; +}; + +struct tegra_xhci_hcd { + struct device *dev; + struct platform_device *xhci_pdev; + + int mbox_irq; + struct notifier_block mbox_nb; + + phys_addr_t host_phys_base; + void __iomem *fpci_base; + void __iomem *ipfs_base; + + const struct tegra_xhci_soc_config *soc_config; + + struct regulator *xusb_s1p05v_reg; + struct regulator *xusb_s3p3v_reg; + struct regulator *xusb_s1p8v_reg; + + /* XUSB host clock */ + struct clk *host_clk; + /* XUSB Falcon controller clock */ + struct clk *falc_clk; + /* XUSB host reset */ + struct reset_control *host_rst; + + /* XUSB PHY */ + struct phy *phy; + + /* Firmware loading related */ + void *fw_data; + size_t fw_size; + dma_addr_t fw_dma_addr; +}; + +static RAW_NOTIFIER_HEAD(tegra_xhci_mbox_notifiers); +static DEFINE_MUTEX(tegra_xhci_mbox_lock); + +int tegra_xhci_register_mbox_notifier(struct notifier_block *nb) +{ + int ret; + + mutex_lock(&tegra_xhci_mbox_lock); + ret = raw_notifier_chain_register(&tegra_xhci_mbox_notifiers, nb); + mutex_unlock(&tegra_xhci_mbox_lock); + + return ret; +} +EXPORT_SYMBOL(tegra_xhci_register_mbox_notifier); + +void tegra_xhci_unregister_mbox_notifier(struct notifier_block *nb) +{ + mutex_lock(&tegra_xhci_mbox_lock); + raw_notifier_chain_unregister(&tegra_xhci_mbox_notifiers, nb); + mutex_unlock(&tegra_xhci_mbox_lock); +} +EXPORT_SYMBOL(tegra_xhci_unregister_mbox_notifier); + +static inline u32 fpci_readl(struct tegra_xhci_hcd *tegra, u32 addr) +{ + return readl(tegra->fpci_base + addr); +} + +static inline void fpci_writel(struct tegra_xhci_hcd *tegra, u32 val, u32 addr) +{ + writel(val, tegra->fpci_base + addr); +} + +static inline u32 ipfs_readl(struct tegra_xhci_hcd *tegra, u32 addr) +{ + return readl(tegra->ipfs_base + addr); +} + +static inline void ipfs_writel(struct tegra_xhci_hcd *tegra, u32 val, u32 addr) +{ + writel(val, tegra->ipfs_base + addr); +} + +static u32 csb_readl(struct tegra_xhci_hcd *tegra, u32 addr) +{ + u32 page, offset; + + page = CSB_PAGE_SELECT(addr); + offset = CSB_PAGE_OFFSET(addr); + fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE); + return fpci_readl(tegra, XUSB_CFG_CSB_BASE_ADDR + offset); +} + +static void csb_writel(struct tegra_xhci_hcd *tegra, u32 val, u32 addr) +{ + u32 page, offset; + + page = CSB_PAGE_SELECT(addr); + offset = CSB_PAGE_OFFSET(addr); + fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE); + fpci_writel(tegra, val, XUSB_CFG_CSB_BASE_ADDR + offset); +} + +static void tegra_xhci_cfg(struct tegra_xhci_hcd *tegra) +{ + u32 reg; + + reg = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0); + reg |= IPFS_EN_FPCI; + ipfs_writel(tegra, reg, IPFS_XUSB_HOST_CONFIGURATION_0); + udelay(10); + + /* Program Bar0 Space */ + reg = fpci_readl(tegra, XUSB_CFG_4); + reg |= tegra->host_phys_base; + fpci_writel(tegra, reg, XUSB_CFG_4); + usleep_range(100, 200); + + /* Enable Bus Master */ + reg = fpci_readl(tegra, XUSB_CFG_1); + reg |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN; + fpci_writel(tegra, reg, XUSB_CFG_1); + + /* Set intr mask to enable intr assertion */ + reg = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0); + reg |= IPFS_IP_INT_MASK; + ipfs_writel(tegra, reg, IPFS_XUSB_HOST_INTR_MASK_0); + + /* Set hysteris to 0x80 */ + ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0); +} + +static int tegra_xhci_mbox_send(struct tegra_xhci_hcd *tegra, + enum tegra_xusb_mbox_cmd type, u32 data) +{ + struct device *dev = tegra->dev; + unsigned long timeout; + u32 reg; + + dev_dbg(dev, "MBOX send message 0x%x:0x%x\n", type, data); + mutex_lock(&tegra_xhci_mbox_lock); + + timeout = jiffies + msecs_to_jiffies(20); + /* Wait for mailbox to become idle */ + while ((fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER) != MBOX_OWNER_NONE) + && time_is_after_jiffies(timeout)) { + mutex_unlock(&tegra_xhci_mbox_lock); + usleep_range(100, 200); + mutex_lock(&tegra_xhci_mbox_lock); + } + if (fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER) != MBOX_OWNER_NONE) { + dev_err(dev, "Mailbox failed to go idle\n"); + goto timeout; + } + + timeout = jiffies + msecs_to_jiffies(10); + /* Acquire mailbox */ + fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER); + while ((fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER) != MBOX_OWNER_SW) && + time_is_after_jiffies(timeout)) { + mutex_unlock(&tegra_xhci_mbox_lock); + usleep_range(100, 200); + mutex_lock(&tegra_xhci_mbox_lock); + fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER); + } + if (fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER) != MBOX_OWNER_SW) { + dev_err(dev, "Acquire mailbox timeout\n"); + goto timeout; + } + + reg = (type & CMD_TYPE_MASK) << CMD_TYPE_SHIFT; + reg |= (data & CMD_DATA_MASK) << CMD_DATA_SHIFT; + fpci_writel(tegra, reg, XUSB_CFG_ARU_MBOX_DATA_IN); + + reg = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD); + reg |= MBOX_INT_EN | MBOX_FALC_INT_EN; + fpci_writel(tegra, reg, XUSB_CFG_ARU_MBOX_CMD); + + mutex_unlock(&tegra_xhci_mbox_lock); + + return 0; +timeout: + mutex_unlock(&tegra_xhci_mbox_lock); + return -ETIMEDOUT; +} + +static irqreturn_t tegra_xhci_mbox_irq(int irq, void *p) +{ + struct tegra_xhci_hcd *tegra = (struct tegra_xhci_hcd *)p; + struct device *dev = tegra->dev; + u32 resp = 0, cmd_type, cmd_data, reg; + + mutex_lock(&tegra_xhci_mbox_lock); + + /* Clear mbox interrupts */ + reg = fpci_readl(tegra, XUSB_CFG_ARU_SMI_INTR); + if (reg & MBOX_SMI_INTR_FW_HANG) + dev_err(dev, "Hang up inside firmware\n"); + fpci_writel(tegra, reg, XUSB_CFG_ARU_SMI_INTR); + + /* Get the mbox message from firmware */ + reg = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_DATA_OUT); + cmd_type = (reg >> CMD_TYPE_SHIFT) & CMD_TYPE_MASK; + cmd_data = (reg >> CMD_DATA_SHIFT) & CMD_DATA_MASK; + + /* Decode the message and call the notifiers */ + dev_dbg(dev, "MBOX receive message 0x%x:0x%x\n", cmd_type, cmd_data); + if (cmd_type < MBOX_CMD_MAX) { + struct mbox_notifier_data mbox_info; + + mbox_info.msg_data = cmd_data; + mbox_info.resp_cmd = 0; + mbox_info.resp_data = 0; + raw_notifier_call_chain(&tegra_xhci_mbox_notifiers, cmd_type, + &mbox_info); + if (mbox_info.resp_cmd) { + resp = (mbox_info.resp_cmd & CMD_TYPE_MASK) << + CMD_TYPE_SHIFT; + resp |= (mbox_info.resp_data & CMD_DATA_MASK) << + CMD_DATA_SHIFT; + } + } else if (cmd_type == MBOX_CMD_ACK) { + dev_dbg(dev, "Firmware responds with ACK\n"); + } else if (cmd_type == MBOX_CMD_NAK) { + dev_err(dev, "Firmware responds with NAK\n"); + } else { + dev_err(dev, "Invalid command %x\n", cmd_type); + } + + if (resp) { + /* Send ACK/NAK to firmware */ + fpci_writel(tegra, resp, XUSB_CFG_ARU_MBOX_DATA_IN); + reg = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD); + reg |= MBOX_INT_EN | MBOX_FALC_INT_EN; + fpci_writel(tegra, reg, XUSB_CFG_ARU_MBOX_CMD); + } else { + /* Clear MBOX_SMI_INT_EN bit */ + reg = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD); + reg &= ~MBOX_SMI_INT_EN; + fpci_writel(tegra, reg, XUSB_CFG_ARU_MBOX_CMD); + /* Clear mailbox ownership */ + fpci_writel(tegra, MBOX_OWNER_NONE, XUSB_CFG_ARU_MBOX_OWNER); + } + + mutex_unlock(&tegra_xhci_mbox_lock); + + return IRQ_HANDLED; +} + +static int tegra_xhci_default_mbox_notifier(struct notifier_block *nb, + unsigned long event, void *p) +{ + struct tegra_xhci_hcd *tegra = container_of(nb, struct tegra_xhci_hcd, + mbox_nb); + struct mbox_notifier_data *data = (struct mbox_notifier_data *)p; + + switch (event) { + case MBOX_CMD_INC_FALC_CLOCK: + case MBOX_CMD_DEC_FALC_CLOCK: + data->resp_data = clk_get_rate(tegra->falc_clk) / 1000; + if (data->resp_data != data->msg_data) + data->resp_cmd = MBOX_CMD_NAK; + else + data->resp_cmd = MBOX_CMD_ACK; + return NOTIFY_STOP; + case MBOX_CMD_SET_BW: + /* No support for EMC scaling yet */ + return NOTIFY_STOP; + default: + return NOTIFY_DONE; + } +} + +static int tegra_xhci_load_firmware(struct tegra_xhci_hcd *tegra) +{ + struct device *dev = tegra->dev; + struct tegra_xhci_fw_cfgtbl *cfg_tbl; + u64 fw_base; + u32 val; + time_t fw_time; + struct tm fw_tm; + + if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) { + dev_info(dev, "Firmware already loaded, Falcon state 0x%x\n", + csb_readl(tegra, XUSB_FALC_CPUCTL)); + return 0; + } + + cfg_tbl = (struct tegra_xhci_fw_cfgtbl *)tegra->fw_data; + + /* Program the size of DFI into ILOAD_ATTR */ + csb_writel(tegra, tegra->fw_size, XUSB_CSB_MP_ILOAD_ATTR); + + /* + * Boot code of the firmware reads the ILOAD_BASE registers + * to get to the start of the DFI in system memory. + */ + fw_base = tegra->fw_dma_addr + sizeof(*cfg_tbl); + csb_writel(tegra, fw_base, XUSB_CSB_MP_ILOAD_BASE_LO); + csb_writel(tegra, fw_base >> 32, XUSB_CSB_MP_ILOAD_BASE_HI); + + /* Set BOOTPATH to 1 in APMAP. */ + csb_writel(tegra, APMAP_BOOTPATH, XUSB_CSB_MP_APMAP); + + /* Invalidate L2IMEM. */ + csb_writel(tegra, L2IMEMOP_INVALIDATE_ALL, XUSB_CSB_MP_L2IMEMOP_TRIG); + + /* + * Initiate fetch of bootcode from system memory into L2IMEM. + * Program bootcode location and size in system memory. + */ + val = (DIV_ROUND_UP(cfg_tbl->boot_codetag, IMEM_BLOCK_SIZE) & + L2IMEMOP_SIZE_SRC_OFFSET_MASK) << L2IMEMOP_SIZE_SRC_OFFSET_SHIFT; + val |= (DIV_ROUND_UP(cfg_tbl->boot_codesize, IMEM_BLOCK_SIZE) & + L2IMEMOP_SIZE_SRC_COUNT_MASK) << L2IMEMOP_SIZE_SRC_COUNT_SHIFT; + csb_writel(tegra, val, XUSB_CSB_MP_L2IMEMOP_SIZE); + + /* Trigger L2IMEM Load operation. */ + csb_writel(tegra, L2IMEMOP_LOAD_LOCKED_RESULT, + XUSB_CSB_MP_L2IMEMOP_TRIG); + + /* Setup Falcon Auto-fill */ + val = DIV_ROUND_UP(cfg_tbl->boot_codesize, IMEM_BLOCK_SIZE); + csb_writel(tegra, val, XUSB_FALC_IMFILLCTL); + + val = DIV_ROUND_UP(cfg_tbl->boot_codetag, IMEM_BLOCK_SIZE) & + IMFILLRNG1_TAG_MASK; + val |= DIV_ROUND_UP(cfg_tbl->boot_codetag + cfg_tbl->boot_codesize, + IMEM_BLOCK_SIZE) << IMFILLRNG1_TAG_HI_SHIFT; + csb_writel(tegra, val, XUSB_FALC_IMFILLRNG1); + + csb_writel(tegra, 0, XUSB_FALC_DMACTL); + msleep(50); + + csb_writel(tegra, cfg_tbl->boot_codetag, XUSB_FALC_BOOTVEC); + + /* Start Falcon CPU */ + csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL); + usleep_range(1000, 2000); + + fw_time = cfg_tbl->fwimg_created_time; + time_to_tm(fw_time, 0, &fw_tm); + dev_info(dev, + "Firmware timestamp: %ld-%02d-%02d %02d:%02d:%02d UTC, " + "Falcon state 0x%x\n", fw_tm.tm_year + 1900, + fw_tm.tm_mon + 1, fw_tm.tm_mday, fw_tm.tm_hour, + fw_tm.tm_min, fw_tm.tm_sec, + csb_readl(tegra, XUSB_FALC_CPUCTL)); + + /* Bail out if Falcon CPU is not in a good state */ + if (csb_readl(tegra, XUSB_FALC_CPUCTL) == CPUCTL_STATE_HALTED) + return -EIO; + + return 0; +} + +static int tegra_xhci_regulator_init(struct tegra_xhci_hcd *tegra) +{ + struct device *dev = tegra->dev; + int err = 0; + + tegra->xusb_s3p3v_reg = devm_regulator_get(dev, "s3p3v"); + if (IS_ERR(tegra->xusb_s3p3v_reg)) { + dev_err(dev, "s3p3v regulator not found: %ld.", + PTR_ERR(tegra->xusb_s3p3v_reg)); + return PTR_ERR(tegra->xusb_s3p3v_reg); + } + err = regulator_enable(tegra->xusb_s3p3v_reg); + if (err < 0) { + dev_err(dev, "s3p3v regulator enable failed:%d\n", err); + return err; + } + + tegra->xusb_s1p8v_reg = devm_regulator_get(dev, "s1p8v"); + if (IS_ERR(tegra->xusb_s1p8v_reg)) { + dev_err(dev, "s1p8v regulator not found: %ld.", + PTR_ERR(tegra->xusb_s1p8v_reg)); + err = PTR_ERR(tegra->xusb_s1p8v_reg); + goto err_put_s3p3v_reg; + } else { + err = regulator_enable(tegra->xusb_s1p8v_reg); + if (err < 0) { + dev_err(dev, "s1p8v regulator enable failed:%d\n", err); + goto err_put_s3p3v_reg; + } + } + + tegra->xusb_s1p05v_reg = devm_regulator_get(dev, "s1p05v"); + if (IS_ERR(tegra->xusb_s1p05v_reg)) { + dev_err(dev, "s1p05v regulator not found: %ld.", + PTR_ERR(tegra->xusb_s1p05v_reg)); + err = PTR_ERR(tegra->xusb_s1p05v_reg); + goto err_put_s1p8v_reg; + } else { + err = regulator_enable(tegra->xusb_s1p05v_reg); + if (err < 0) { + dev_err(dev, + "s1p05v regulator enable failed:%d\n", err); + goto err_put_s1p8v_reg; + } + } + + return 0; + +err_put_s1p8v_reg: + regulator_disable(tegra->xusb_s1p8v_reg); +err_put_s3p3v_reg: + regulator_disable(tegra->xusb_s3p3v_reg); + return err; +} + +static void tegra_xhci_regulator_deinit(struct tegra_xhci_hcd *tegra) +{ + regulator_disable(tegra->xusb_s1p05v_reg); + regulator_disable(tegra->xusb_s1p8v_reg); + regulator_disable(tegra->xusb_s3p3v_reg); +} + +static int tegra_xhci_clk_init(struct tegra_xhci_hcd *tegra) +{ + struct device *dev = tegra->dev; + int err = 0; + + tegra->host_clk = devm_clk_get(dev, "xusb_host"); + if (IS_ERR(tegra->host_clk)) { + dev_err(dev, "Failed to get xusb_host clk\n"); + err = PTR_ERR(tegra->host_clk); + return err; + } + + tegra->falc_clk = devm_clk_get(dev, "xusb_falcon_src"); + if (IS_ERR(tegra->falc_clk)) { + dev_err(dev, "Failed to get xusb_falcon_src clk\n"); + err = PTR_ERR(tegra->falc_clk); + return err; + } + + clk_prepare_enable(tegra->host_clk); + clk_prepare_enable(tegra->falc_clk); + + return 0; +} + +static void tegra_xhci_clk_deinit(struct tegra_xhci_hcd *tegra) +{ + clk_disable_unprepare(tegra->host_clk); + clk_disable_unprepare(tegra->falc_clk); +} + +static const struct tegra_xhci_soc_config tegra114_soc_config = { + .firmware_file = "tegra11x/tegra_xusb_firmware", +}; + +static const struct tegra_xhci_soc_config tegra124_soc_config = { + .firmware_file = "tegra12x/tegra_xusb_firmware", +}; + +static struct of_device_id tegra_xhci_of_match[] = { + { .compatible = "nvidia,tegra114-xhci", .data = &tegra114_soc_config }, + { .compatible = "nvidia,tegra124-xhci", .data = &tegra124_soc_config }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_xhci_of_match); + +static void tegra_xhci_probe_finish(const struct firmware *fw, void *context) +{ + struct tegra_xhci_hcd *tegra = context; + struct device *dev = tegra->dev; + struct platform_device *xhci = NULL; + struct resource xhci_resources[2]; + struct resource *res; + struct tegra_xhci_fw_cfgtbl *cfg_tbl; + int ret; + + if (!fw) { + dev_err(dev, "Failed to load firmware file\n"); + ret = -ENOENT; + goto out; + } + + /* Load Falcon controller with its firmware */ + cfg_tbl = (struct tegra_xhci_fw_cfgtbl *)fw->data; + tegra->fw_size = cfg_tbl->fwimg_len; + tegra->fw_data = dma_alloc_coherent(dev, tegra->fw_size, + &tegra->fw_dma_addr, + GFP_KERNEL); + if (!tegra->fw_data) { + dev_err(dev, "Failed to allocate DMA buffer for firmware\n"); + ret = -ENOMEM; + goto out; + } + memcpy(tegra->fw_data, fw->data, tegra->fw_size); + + ret = tegra_xhci_load_firmware(tegra); + if (ret < 0) { + dev_err(dev, "Failed to load controller firmware\n"); + goto out; + } + + /* Set up mailbox notifier and interrupt handler */ + tegra->mbox_nb.notifier_call = tegra_xhci_default_mbox_notifier; + ret = tegra_xhci_register_mbox_notifier(&tegra->mbox_nb); + if (ret < 0) { + dev_err(dev, "Failed to registe mbox handler\n"); + goto out; + } + tegra->mbox_irq = platform_get_irq(to_platform_device(dev), 1); + if (!tegra->mbox_irq) { + dev_err(dev, "Missing MBOX IRQ\n"); + ret = -ENODEV; + goto out; + } + ret = devm_request_threaded_irq(dev, tegra->mbox_irq, NULL, + tegra_xhci_mbox_irq, IRQF_ONESHOT, + "tegra_xhci_mbox_irq", tegra); + if (ret != 0) { + dev_err(dev, "Failed to request MBOX IRQ\n"); + goto out; + } + + /* Create child xhci-plat device */ + memset(xhci_resources, 0, sizeof(xhci_resources)); + res = platform_get_resource(to_platform_device(dev), IORESOURCE_IRQ, 0); + if (!res) { + dev_err(dev, "Missing XHCI IRQ\n"); + ret = -ENODEV; + goto out; + } + xhci_resources[0].start = res->start; + xhci_resources[0].end = res->end; + xhci_resources[0].flags = res->flags; + xhci_resources[0].name = res->name; + res = platform_get_resource(to_platform_device(dev), IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "Missing XHCI registers\n"); + ret = -ENODEV; + goto out; + } + xhci_resources[1].start = res->start; + xhci_resources[1].end = res->end; + xhci_resources[1].flags = res->flags; + xhci_resources[1].name = res->name; + + xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); + if (!xhci) { + dev_err(dev, "Failed to allocate XHCI host\n"); + ret = -ENOMEM; + goto out; + } + xhci->dev.parent = dev; + ret = dma_coerce_mask_and_coherent(&xhci->dev, + dev->coherent_dma_mask); + if (ret) { + dev_err(dev, "Failed to set XHCI dma mask\n"); + goto out; + } + ret = platform_device_add_resources(xhci, xhci_resources, + ARRAY_SIZE(xhci_resources)); + if (ret) { + dev_err(dev, "Failed to add XHCI resources\n"); + goto out; + } + ret = platform_device_add(xhci); + if (ret) { + dev_err(dev, "failed to register XHCI device\n"); + goto out; + } + tegra->xhci_pdev = xhci; + + /* Enable firmware messages from controller */ + tegra_xhci_mbox_send(tegra, MBOX_CMD_MSG_ENABLED, 0); + +out: + release_firmware(fw); + if (ret) + platform_device_put(xhci); +} + +static int tegra_xhci_probe(struct platform_device *pdev) +{ + struct tegra_xhci_hcd *tegra; + struct resource *res; + const struct of_device_id *match; + int ret; + + BUILD_BUG_ON(sizeof(struct tegra_xhci_fw_cfgtbl) != 256); + + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); + if (!tegra) { + dev_err(&pdev->dev, "memory alloc failed\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, tegra); + tegra->dev = &pdev->dev; + + match = of_match_device(tegra_xhci_of_match, &pdev->dev); + if (!match) { + dev_err(&pdev->dev, "No device match found\n"); + return -ENODEV; + } + tegra->soc_config = match->data; + + /* + * Right now device-tree probed devices don't get dma_mask set. + * Since shared usb code relies on it, set it here for now. + * Once we have dma capability bindings this can go away. + */ + ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) + return ret; + + /* + * The firmware needs the XHCI host's base physical address. + * Get it here and save it for later. + */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Missing XHCI registers\n"); + return -ENODEV; + } + tegra->host_phys_base = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + tegra->fpci_base = devm_ioremap_resource(&pdev->dev, res); + if (!tegra->fpci_base) { + dev_err(&pdev->dev, "Failed to map FPCI registers\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res); + if (!tegra->ipfs_base) { + dev_err(&pdev->dev, "Failed to map IPFS registers\n"); + return -ENOMEM; + } + + tegra->phy = devm_phy_get(&pdev->dev, "xusb"); + if (IS_ERR(tegra->phy)) { + dev_err(&pdev->dev, "Failed to get PHY\n"); + return PTR_ERR(tegra->phy); + } + ret = phy_init(tegra->phy); + if (ret < 0) { + dev_err(&pdev->dev, "PHY initialization failed\n"); + return ret; + } + + tegra->host_rst = devm_reset_control_get(&pdev->dev, "xusb_host"); + if (IS_ERR(tegra->host_rst)) { + dev_err(&pdev->dev, "Failed to get host reset\n"); + ret = PTR_ERR(tegra->host_rst); + goto err_deinit_phy; + } + + ret = tegra_xhci_clk_init(tegra); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize XHCI clocks\n"); + goto err_deinit_phy; + } + + ret = tegra_xhci_regulator_init(tegra); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize XHCI regulators\n"); + goto err_deinit_clk; + } + + /* Setup IPFS access and BAR0 space */ + tegra_xhci_cfg(tegra); + + ret = phy_power_on(tegra->phy); + if (ret < 0) { + dev_err(&pdev->dev, "PHY power up failed\n"); + goto err_deinit_regulator; + } + + ret = request_firmware_nowait(THIS_MODULE, true, + tegra->soc_config->firmware_file, + tegra->dev, GFP_KERNEL, tegra, + tegra_xhci_probe_finish); + if (ret < 0) { + dev_err(tegra->dev, "Failed to request firmware\n"); + goto err_shutdown_phy; + } + + return 0; + +err_shutdown_phy: + phy_power_off(tegra->phy); +err_deinit_regulator: + tegra_xhci_regulator_deinit(tegra); +err_deinit_clk: + tegra_xhci_clk_deinit(tegra); +err_deinit_phy: + phy_exit(tegra->phy); + + return ret; +} + +static int tegra_xhci_remove(struct platform_device *pdev) +{ + struct tegra_xhci_hcd *tegra = platform_get_drvdata(pdev); + + phy_power_off(tegra->phy); + phy_exit(tegra->phy); + + if (tegra->fw_data) + dma_free_coherent(tegra->dev, tegra->fw_size, tegra->fw_data, + tegra->fw_dma_addr); + + tegra_xhci_unregister_mbox_notifier(&tegra->mbox_nb); + tegra_xhci_regulator_deinit(tegra); + tegra_xhci_clk_deinit(tegra); + + return 0; +} + +static struct platform_driver tegra_xhci_driver = { + .probe = tegra_xhci_probe, + .remove = tegra_xhci_remove, + .driver = { + .name = "tegra-xhci", + .of_match_table = of_match_ptr(tegra_xhci_of_match), + }, +}; +module_platform_driver(tegra_xhci_driver); + +MODULE_DESCRIPTION("NVIDIA Tegra XHCI host-controller driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tegra-xhci"); diff --git a/drivers/usb/host/xhci-tegra.h b/drivers/usb/host/xhci-tegra.h new file mode 100644 index 0000000..b65bfdb --- /dev/null +++ b/drivers/usb/host/xhci-tegra.h @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2014 NVIDIA Corporation + * Copyright (C) 2014 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __XHCI_TEGRA_H +#define __XHCI_TEGRA_H + +/* FPCI CFG registers */ +#define XUSB_CFG_0 0x0 +#define XUSB_CFG_1 0x4 +#define XUSB_IO_SPACE_EN BIT(0) +#define XUSB_MEM_SPACE_EN BIT(1) +#define XUSB_BUS_MASTER_EN BIT(2) +#define XUSB_CFG_4 0x10 +#define XUSB_CFG_16 0x40 +#define XUSB_CFG_24 0x60 +#define XUSB_CFG_ARU_MBOX_CMD 0xe4 +#define MBOX_FALC_INT_EN BIT(27) +#define MBOX_PME_INT_EN BIT(28) +#define MBOX_SMI_INT_EN BIT(29) +#define MBOX_XHCI_INT_EN BIT(30) +#define MBOX_INT_EN BIT(31) +#define XUSB_CFG_ARU_MBOX_DATA_IN 0xe8 +#define CMD_DATA_SHIFT 0 +#define CMD_DATA_MASK 0xffffff +#define CMD_TYPE_SHIFT 24 +#define CMD_TYPE_MASK 0xff +#define XUSB_CFG_ARU_MBOX_DATA_OUT 0xec +#define XUSB_CFG_ARU_MBOX_OWNER 0xf0 +#define MBOX_OWNER_NONE 0 +#define MBOX_OWNER_FW 1 +#define MBOX_OWNER_SW 2 +#define XUSB_CFG_FPCICFG 0xf8 +#define XUSB_CFG_ARU_C11PAGESEL0 0x400 +#define XUSB_CFG_ARU_C11PAGESEL1 0x404 +#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c +#define XUSB_CFG_ARU_SMI_INTR 0x428 +#define MBOX_SMI_INTR_FW_HANG BIT(1) +#define MBOX_SMI_INTR_EN BIT(3) +#define XUSB_CFG_ARU_RST 0x42c +#define XUSB_CFG_ARU_CONTEXT 0x43c +#define XUSB_CFG_ARU_FW_SCRATCH 0x440 +#define XUSB_CFG_ARU_CONTEXT_HS_PLS 0x478 +#define XUSB_CFG_ARU_CONTEXT_FS_PLS 0x47c +#define XUSB_CFG_ARU_CONTEXT_HSFS_SPEED 0x480 +#define XUSB_CFG_ARU_CONTEXT_HSFS_PP 0x484 +#define XUSB_CFG_HSPX_CORE_HSICWRAP 0x658 +#define XUSB_CFG_CSB_BASE_ADDR 0x800 + +/* IPFS registers */ +#define IPFS_XUSB_HOST_MSI_BAR_SZ_0 0xc0 +#define IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0 0xc4 +#define IPFS_XUSB_HOST_FPCI_BAR_ST_0 0xc8 +#define IPFS_XUSB_HOST_MSI_VEC0_0 0x100 +#define IPFS_XUSB_HOST_MSI_EN_VEC0_0 0x140 +#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180 +#define IPFS_EN_FPCI BIT(0) +#define IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0 0x184 +#define IPFS_XUSB_HOST_INTR_MASK_0 0x188 +#define IPFS_IP_INT_MASK BIT(16) +#define IPFS_XUSB_HOST_IPFS_INTR_ENABLE_0 0x198 +#define IPFS_XUSB_HOST_UFPCI_CONFIG_0 0x19c +#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc +#define IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0 0x1dc + +#define IMEM_BLOCK_SIZE 256 + +#define CSB_PAGE_SELECT_MASK 0x7fffff +#define CSB_PAGE_SELECT_SHIFT 9 +#define CSB_PAGE_OFFSET_MASK 0x1ff +#define CSB_PAGE_SELECT(addr) ((addr) >> (CSB_PAGE_SELECT_SHIFT) & \ + CSB_PAGE_SELECT_MASK) +#define CSB_PAGE_OFFSET(addr) ((addr) & CSB_PAGE_OFFSET_MASK) + +/* Falcon CSB registers */ +#define XUSB_FALC_CPUCTL 0x100 +#define CPUCTL_STARTCPU BIT(1) +#define CPUCTL_STATE_HALTED BIT(4) +#define XUSB_FALC_BOOTVEC 0x104 +#define XUSB_FALC_DMACTL 0x10c +#define XUSB_FALC_IMFILLRNG1 0x154 +#define IMFILLRNG1_TAG_MASK 0xffff +#define IMFILLRNG1_TAG_HI_SHIFT 16 +#define XUSB_FALC_IMFILLCTL 0x158 +#define XUSB_FALC_CMEMBASE 0x160 +#define XUSB_FALC_DMEMAPERT 0x164 +#define XUSB_FALC_IMEMC_START 0x180 +#define XUSB_FALC_IMEMD_START 0x184 +#define XUSB_FALC_IMEMT_START 0x188 +#define XUSB_FALC_ICD_CMD 0x200 +#define XUSB_FALC_ICD_RDATA 0x20C +#define XUSB_FALC_SS_PVTPORTSC1 0x116000 +#define XUSB_FALC_SS_PVTPORTSC2 0x116004 +#define XUSB_FALC_SS_PVTPORTSC3 0x116008 +#define XUSB_FALC_HS_PVTPORTSC1 0x116800 +#define XUSB_FALC_HS_PVTPORTSC2 0x116804 +#define XUSB_FALC_HS_PVTPORTSC3 0x116808 +#define XUSB_FALC_FS_PVTPORTSC1 0x117000 +#define XUSB_FALC_FS_PVTPORTSC2 0x117004 +#define XUSB_FALC_FS_PVTPORTSC3 0x117008 + +/* MP CSB registers */ +#define XUSB_CSB_MP_ILOAD_ATTR 0x101a00 +#define XUSB_CSB_MP_ILOAD_BASE_LO 0x101a04 +#define XUSB_CSB_MP_ILOAD_BASE_HI 0x101a08 +#define XUSB_CSB_MP_L2IMEMOP_SIZE 0x101a10 +#define L2IMEMOP_SIZE_SRC_OFFSET_SHIFT 8 +#define L2IMEMOP_SIZE_SRC_OFFSET_MASK 0x3ff +#define L2IMEMOP_SIZE_SRC_COUNT_SHIFT 24 +#define L2IMEMOP_SIZE_SRC_COUNT_MASK 0xff +#define XUSB_CSB_MP_L2IMEMOP_TRIG 0x101a14 +#define L2IMEMOP_ACTION_SHIFT 24 +#define L2IMEMOP_INVALIDATE_ALL (0x40 << L2IMEMOP_ACTION_SHIFT) +#define L2IMEMOP_LOAD_LOCKED_RESULT (0x11 << L2IMEMOP_ACTION_SHIFT) +#define XUSB_CSB_MP_APMAP 0x10181c +#define APMAP_BOOTPATH BIT(31) + +#endif /* __XHCI_TEGRA_H */ diff --git a/include/linux/usb/tegra_xusb.h b/include/linux/usb/tegra_xusb.h new file mode 100644 index 0000000..1a654e7 --- /dev/null +++ b/include/linux/usb/tegra_xusb.h @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2014 NVIDIA Corporation + * Copyright (C) 2014 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TEGRA_XUSB_H +#define __TEGRA_XUSB_H + +/* Command requests from the firmware */ +enum tegra_xusb_mbox_cmd { + MBOX_CMD_MSG_ENABLED = 1, + MBOX_CMD_INC_FALC_CLOCK, + MBOX_CMD_DEC_FALC_CLOCK, + MBOX_CMD_INC_SSPI_CLOCK, + MBOX_CMD_DEC_SSPI_CLOCK, + MBOX_CMD_SET_BW, /* no ACK/NAK required */ + MBOX_CMD_SET_SS_PWR_GATING, + MBOX_CMD_SET_SS_PWR_UNGATING, + MBOX_CMD_SAVE_DFE_CTLE_CTX, + MBOX_CMD_AIRPLANE_MODE_ENABLED, /* unused */ + MBOX_CMD_AIRPLANE_MODE_DISABLED, /* unused */ + MBOX_CMD_START_HSIC_IDLE, + MBOX_CMD_STOP_HSIC_IDLE, + MBOX_CMD_DBC_WAKE_STACK, /* unused */ + MBOX_CMD_HSIC_PRETEND_CONNECT, + + MBOX_CMD_MAX, + + /* Response message to above commands */ + MBOX_CMD_ACK = 128, + MBOX_CMD_NAK +}; + +struct notifier_block; + +/* + * Tegra XUSB MBOX handler interface: + * - Drivers which may handle mbox messages should register a notifier. + * - The notifier event will be an mbox command (above) and the data will + * be a pointer to struct mbox_notifier_data. + * - If a notifier has handled the message, it should return NOTIFY_STOP + * and populate resp_{cmd,data} appropriately. + * - A resp_cmd of 0 indicates that no response should be sent. + */ +struct mbox_notifier_data { + u32 msg_data; /* Inbound message data */ + u32 resp_cmd; /* Response message command */ + u32 resp_data; /* Response message data */ +}; + +extern int tegra_xhci_register_mbox_notifier(struct notifier_block *nb); +extern void tegra_xhci_unregister_mbox_notifier(struct notifier_block *nb); + +#endif /* __TEGRA_XUSB_H */ -- 1.9.1.423.g4596e3a -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html