Add support for the on-chip XHCI host controller present on Tegra 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> --- drivers/usb/host/Kconfig | 12 + drivers/usb/host/Makefile | 2 + drivers/usb/host/xhci-tegra.c | 900 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 914 insertions(+) create mode 100644 drivers/usb/host/xhci-tegra.c diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 61b7817..a8fb138 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -37,6 +37,18 @@ config USB_XHCI_MVEBU Say 'Y' to enable the support for the xHCI host controller found in Marvell Armada 375/38x ARM SOCs. +config USB_XHCI_TEGRA + tristate "NVIDIA Tegra XHCI support" + depends on ARCH_TEGRA + select PINCTRL_TEGRA_XUSB + select TEGRA_XUSB_MBOX + select FW_LOADER + ---help--- + Enables support for the on-chip XHCI controller present on NVIDIA + Tegra124 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 af89a90..cbba340 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -41,6 +41,8 @@ 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..609374e --- /dev/null +++ b/drivers/usb/host/xhci-tegra.c @@ -0,0 +1,900 @@ +/* + * 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/tegra-xusb-mbox.h> + +#include "xhci.h" + +#define TEGRA_XHCI_UTMI_PHYS 3 +#define TEGRA_XHCI_HSIC_PHYS 2 +#define TEGRA_XHCI_USB3_PHYS 2 +#define TEGRA_XHCI_MAX_PHYS (TEGRA_XHCI_UTMI_PHYS + TEGRA_XHCI_HSIC_PHYS + \ + TEGRA_XHCI_USB3_PHYS) + +#define TEGRA_XHCI_SS_CLK_HIGH_SPEED 120000000 +#define TEGRA_XHCI_SS_CLK_LOW_SPEED 12000000 + +/* FPCI CFG registers */ +#define XUSB_CFG_1 0x004 +#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 0x010 +#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c +#define XUSB_CFG_CSB_BASE_ADDR 0x800 + +/* IPFS registers */ +#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180 +#define IPFS_EN_FPCI BIT(0) +#define IPFS_XUSB_HOST_INTR_MASK_0 0x188 +#define IPFS_IP_INT_MASK BIT(16) +#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc + +#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 + +/* 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) + +#define IMEM_BLOCK_SIZE 256 + +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 usb_hcd *hcd; + + int irq; + + void __iomem *fpci_base; + void __iomem *ipfs_base; + + const struct tegra_xhci_soc_config *soc_config; + + struct notifier_block mbox_nb; + struct tegra_xusb_mbox *mbox; + + struct regulator *s1p05v_reg; + struct regulator *s3p3v_reg; + struct regulator *s1p8v_reg; + + struct clk *host_clk; + struct clk *falc_clk; + struct clk *ss_clk; + struct clk *ss_src_clk; + struct clk *hs_src_clk; + struct clk *fs_src_clk; + struct clk *pll_u_480m; + struct clk *clk_m; + struct clk *pll_e; + + struct reset_control *host_rst; + struct reset_control *ss_rst; + + struct phy *phys[TEGRA_XHCI_MAX_PHYS]; + + /* Firmware loading related */ + void *fw_data; + size_t fw_size; + dma_addr_t fw_dma_addr; + bool fw_loaded; +}; + +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->hcd->rsrc_start; + 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_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_set_ss_clk(struct tegra_xhci_hcd *tegra, + unsigned long rate) +{ + unsigned long new_parent_rate, old_parent_rate; + int ret, div; + struct clk *clk = tegra->ss_src_clk; + + if (clk_get_rate(clk) == rate) + return 0; + + switch (rate) { + case TEGRA_XHCI_SS_CLK_HIGH_SPEED: + /* Reparent to PLLU_480M. Set div first to avoid overclocking */ + old_parent_rate = clk_get_rate(clk_get_parent(clk)); + new_parent_rate = clk_get_rate(tegra->pll_u_480m); + div = new_parent_rate / rate; + ret = clk_set_rate(clk, old_parent_rate / div); + if (ret) + return ret; + ret = clk_set_parent(clk, tegra->pll_u_480m); + if (ret) + return ret; + break; + case TEGRA_XHCI_SS_CLK_LOW_SPEED: + /* Reparent to CLK_M */ + ret = clk_set_parent(clk, tegra->clk_m); + if (ret) + return ret; + ret = clk_set_rate(clk, rate); + if (ret) + return ret; + break; + default: + dev_err(tegra->dev, "Invalid SS rate: %lu\n", rate); + return -EINVAL; + } + + if (clk_get_rate(clk) != rate) { + dev_err(tegra->dev, "SS clock doesn't match requested rate\n"); + return -EINVAL; + } + + return 0; +} + +static int tegra_xhci_clk_enable(struct tegra_xhci_hcd *tegra) +{ + clk_prepare_enable(tegra->pll_e); + clk_prepare_enable(tegra->host_clk); + clk_prepare_enable(tegra->ss_clk); + clk_prepare_enable(tegra->falc_clk); + clk_prepare_enable(tegra->fs_src_clk); + clk_prepare_enable(tegra->hs_src_clk); + + return tegra_xhci_set_ss_clk(tegra, TEGRA_XHCI_SS_CLK_HIGH_SPEED); +} + +static void tegra_xhci_clk_disable(struct tegra_xhci_hcd *tegra) +{ + clk_disable_unprepare(tegra->pll_e); + clk_disable_unprepare(tegra->host_clk); + clk_disable_unprepare(tegra->ss_clk); + clk_disable_unprepare(tegra->falc_clk); + clk_disable_unprepare(tegra->fs_src_clk); + clk_disable_unprepare(tegra->hs_src_clk); +} + +static int tegra_xhci_regulator_enable(struct tegra_xhci_hcd *tegra) +{ + int ret; + + ret = regulator_enable(tegra->s3p3v_reg); + if (ret < 0) + return ret; + ret = regulator_enable(tegra->s1p8v_reg); + if (ret < 0) + goto disable_s3p3v; + ret = regulator_enable(tegra->s1p05v_reg); + if (ret < 0) + goto disable_s1p8v; + + return 0; + +disable_s1p8v: + regulator_disable(tegra->s1p8v_reg); +disable_s3p3v: + regulator_disable(tegra->s3p3v_reg); + return ret; +} + +static void tegra_xhci_regulator_disable(struct tegra_xhci_hcd *tegra) +{ + regulator_disable(tegra->s1p05v_reg); + regulator_disable(tegra->s1p8v_reg); + regulator_disable(tegra->s3p3v_reg); +} + +static int tegra_xhci_phy_enable(struct tegra_xhci_hcd *tegra) +{ + int ret; + int i; + + for (i = 0; i < ARRAY_SIZE(tegra->phys); i++) { + ret = phy_init(tegra->phys[i]); + if (ret) + goto disable_phy; + ret = phy_power_on(tegra->phys[i]); + if (ret) { + phy_exit(tegra->phys[i]); + goto disable_phy; + } + } + + return 0; +disable_phy: + for (i = i - 1; i >= 0; i--) { + phy_power_off(tegra->phys[i]); + phy_exit(tegra->phys[i]); + } + return ret; +} + +static void tegra_xhci_phy_disable(struct tegra_xhci_hcd *tegra) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tegra->phys); i++) { + phy_power_off(tegra->phys[i]); + phy_exit(tegra->phys[i]); + } +} + +static int tegra_xhci_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 tegra_xusb_mbox_msg *msg = (struct tegra_xusb_mbox_msg *)p; + int ret; + + switch (event) { + case MBOX_CMD_INC_SSPI_CLOCK: + case MBOX_CMD_DEC_SSPI_CLOCK: + ret = tegra_xhci_set_ss_clk(tegra, msg->data_in * 1000); + msg->data_out = clk_get_rate(tegra->ss_src_clk) / 1000; + if (ret) + msg->cmd_out = MBOX_CMD_NAK; + else + msg->cmd_out = MBOX_CMD_ACK; + return NOTIFY_STOP; + case MBOX_CMD_INC_FALC_CLOCK: + case MBOX_CMD_DEC_FALC_CLOCK: + msg->data_out = clk_get_rate(tegra->falc_clk) / 1000; + if (msg->data_in != msg->data_out) + msg->cmd_out = MBOX_CMD_NAK; + else + msg->cmd_out = 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 void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci) +{ + xhci->quirks |= XHCI_PLAT; +} + +static int tegra_xhci_setup(struct usb_hcd *hcd) +{ + return xhci_gen_setup(hcd, tegra_xhci_quirks); +} + +static const struct hc_driver tegra_xhci_hc_driver = { + .description = "tegra-xhci-hcd", + .product_desc = "Tegra xHCI Host Controller", + .hcd_priv_size = sizeof(struct xhci_hcd *), + + /* + * generic hardware linkage + */ + .irq = xhci_irq, + .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED, + + /* + * basic lifecycle operations + */ + .reset = tegra_xhci_setup, + .start = xhci_run, + .stop = xhci_stop, + .shutdown = xhci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = xhci_urb_enqueue, + .urb_dequeue = xhci_urb_dequeue, + .alloc_dev = xhci_alloc_dev, + .free_dev = xhci_free_dev, + .alloc_streams = xhci_alloc_streams, + .free_streams = xhci_free_streams, + .add_endpoint = xhci_add_endpoint, + .drop_endpoint = xhci_drop_endpoint, + .endpoint_reset = xhci_endpoint_reset, + .check_bandwidth = xhci_check_bandwidth, + .reset_bandwidth = xhci_reset_bandwidth, + .address_device = xhci_address_device, + .enable_device = xhci_enable_device, + .update_hub_device = xhci_update_hub_device, + .reset_device = xhci_discover_or_reset_device, + + /* + * scheduling support + */ + .get_frame_number = xhci_get_frame, + + /* Root hub support */ + .hub_control = xhci_hub_control, + .hub_status_data = xhci_hub_status_data, + .bus_suspend = xhci_bus_suspend, + .bus_resume = xhci_bus_resume, +}; + +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,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 xhci_hcd *xhci = NULL; + struct tegra_xhci_fw_cfgtbl *cfg_tbl; + int ret; + + if (!fw) + goto put_usb2_hcd; + + /* 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) + goto put_usb2_hcd; + memcpy(tegra->fw_data, fw->data, tegra->fw_size); + + ret = tegra_xhci_load_firmware(tegra); + if (ret < 0) + goto put_usb2_hcd; + + ret = usb_add_hcd(tegra->hcd, tegra->irq, IRQF_SHARED); + if (ret < 0) + goto put_usb2_hcd; + device_wakeup_enable(tegra->hcd->self.controller); + + /* + * USB 2.0 roothub is stored in drvdata now. Swap it with the Tegra HCD. + */ + tegra->hcd = dev_get_drvdata(dev); + dev_set_drvdata(dev, tegra); + xhci = hcd_to_xhci(tegra->hcd); + xhci->shared_hcd = usb_create_shared_hcd(&tegra_xhci_hc_driver, + dev, dev_name(dev), + tegra->hcd); + if (!xhci->shared_hcd) + goto dealloc_usb2_hcd; + + /* + * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset) + * is called by usb_add_hcd(). + */ + *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci; + ret = usb_add_hcd(xhci->shared_hcd, tegra->irq, IRQF_SHARED); + if (ret < 0) + goto put_usb3_hcd; + + /* Enable firmware messages from controller */ + ret = tegra_xusb_mbox_send(tegra->mbox, MBOX_CMD_MSG_ENABLED, 0); + if (ret < 0) + goto dealloc_usb3_hcd; + + tegra->fw_loaded = true; + release_firmware(fw); + return; + +dealloc_usb3_hcd: + usb_remove_hcd(xhci->shared_hcd); +put_usb3_hcd: + usb_put_hcd(xhci->shared_hcd); +dealloc_usb2_hcd: + usb_remove_hcd(tegra->hcd); + kfree(xhci); +put_usb2_hcd: + usb_put_hcd(tegra->hcd); + tegra->hcd = NULL; + release_firmware(fw); +} + +static int tegra_xhci_probe(struct platform_device *pdev) +{ + struct tegra_xhci_hcd *tegra; + struct usb_hcd *hcd; + struct resource *res; + struct phy *phy; + const struct of_device_id *match; + int ret, i, j; + + BUILD_BUG_ON(sizeof(struct tegra_xhci_fw_cfgtbl) != 256); + + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); + if (!tegra) + return -ENOMEM; + tegra->dev = &pdev->dev; + platform_set_drvdata(pdev, tegra); + + 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; + + hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!hcd) + return -ENOMEM; + tegra->hcd = hcd; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hcd->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hcd->regs)) { + ret = PTR_ERR(hcd->regs); + goto put_hcd; + } + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + tegra->fpci_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->fpci_base)) { + ret = PTR_ERR(tegra->fpci_base); + goto put_hcd; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->ipfs_base)) { + ret = PTR_ERR(tegra->ipfs_base); + goto put_hcd; + } + + tegra->irq = platform_get_irq(pdev, 0); + if (tegra->irq < 0) { + ret = tegra->irq; + goto put_hcd; + } + + tegra->host_rst = devm_reset_control_get(&pdev->dev, "xusb_host"); + if (IS_ERR(tegra->host_rst)) { + ret = PTR_ERR(tegra->host_rst); + goto put_hcd; + } + tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss"); + if (IS_ERR(tegra->ss_rst)) { + ret = PTR_ERR(tegra->ss_rst); + goto put_hcd; + } + + tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host"); + if (IS_ERR(tegra->host_clk)) { + ret = PTR_ERR(tegra->host_clk); + goto put_hcd; + } + tegra->falc_clk = devm_clk_get(&pdev->dev, "xusb_falcon_src"); + if (IS_ERR(tegra->falc_clk)) { + ret = PTR_ERR(tegra->falc_clk); + goto put_hcd; + } + tegra->ss_clk = devm_clk_get(&pdev->dev, "xusb_ss"); + if (IS_ERR(tegra->ss_clk)) { + ret = PTR_ERR(tegra->ss_clk); + goto put_hcd; + } + tegra->ss_src_clk = devm_clk_get(&pdev->dev, "xusb_ss_src"); + if (IS_ERR(tegra->ss_src_clk)) { + ret = PTR_ERR(tegra->ss_src_clk); + goto put_hcd; + } + tegra->hs_src_clk = devm_clk_get(&pdev->dev, "xusb_hs_src"); + if (IS_ERR(tegra->hs_src_clk)) { + ret = PTR_ERR(tegra->hs_src_clk); + goto put_hcd; + } + tegra->fs_src_clk = devm_clk_get(&pdev->dev, "xusb_fs_src"); + if (IS_ERR(tegra->fs_src_clk)) { + ret = PTR_ERR(tegra->fs_src_clk); + goto put_hcd; + } + tegra->pll_u_480m = devm_clk_get(&pdev->dev, "pll_u_480m"); + if (IS_ERR(tegra->pll_u_480m)) { + ret = PTR_ERR(tegra->pll_u_480m); + goto put_hcd; + } + tegra->clk_m = devm_clk_get(&pdev->dev, "clk_m"); + if (IS_ERR(tegra->clk_m)) { + ret = PTR_ERR(tegra->clk_m); + goto put_hcd; + } + tegra->pll_e = devm_clk_get(&pdev->dev, "pll_e"); + if (IS_ERR(tegra->pll_e)) { + ret = PTR_ERR(tegra->pll_e); + goto put_hcd; + } + ret = tegra_xhci_clk_enable(tegra); + if (ret) + goto put_hcd; + + tegra->s3p3v_reg = devm_regulator_get(&pdev->dev, "s3p3v"); + if (IS_ERR(tegra->s3p3v_reg)) { + ret = PTR_ERR(tegra->s3p3v_reg); + dev_info(&pdev->dev, "s3p3v get failed: %d\n", ret); + goto disable_clk; + } + tegra->s1p8v_reg = devm_regulator_get(&pdev->dev, "s1p8v"); + if (IS_ERR(tegra->s1p8v_reg)) { + ret = PTR_ERR(tegra->s1p8v_reg); + dev_info(&pdev->dev, "s1p8v get failed: %d\n", ret); + goto disable_clk; + } + tegra->s1p05v_reg = devm_regulator_get(&pdev->dev, "s1p05v"); + if (IS_ERR(tegra->s1p05v_reg)) { + ret = PTR_ERR(tegra->s1p05v_reg); + dev_info(&pdev->dev, "s1p05v get failed: %d\n", ret); + goto disable_clk; + } + ret = tegra_xhci_regulator_enable(tegra); + if (ret) + goto disable_clk; + + tegra->mbox = tegra_xusb_mbox_lookup_by_phandle(pdev->dev.of_node, + "nvidia,xusb-mbox"); + if (IS_ERR(tegra->mbox)) + goto disable_regulator; + tegra->mbox_nb.notifier_call = tegra_xhci_mbox_notifier; + tegra_xusb_mbox_register_notifier(tegra->mbox, &tegra->mbox_nb); + + j = 0; + for (i = 0; i < TEGRA_XHCI_UTMI_PHYS; i++) { + char prop[sizeof("utmi-N")]; + + sprintf(prop, "utmi-%d", i); + phy = devm_phy_optional_get(&pdev->dev, prop); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy); + goto unregister_notifier; + } + tegra->phys[j++] = phy; + } + for (i = 0; i < TEGRA_XHCI_HSIC_PHYS; i++) { + char prop[sizeof("hsic-N")]; + + sprintf(prop, "hsic-%d", i); + phy = devm_phy_optional_get(&pdev->dev, prop); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy); + goto unregister_notifier; + } + tegra->phys[j++] = phy; + } + for (i = 0; i < TEGRA_XHCI_USB3_PHYS; i++) { + char prop[sizeof("usb3-N")]; + + sprintf(prop, "usb3-%d", i); + phy = devm_phy_optional_get(&pdev->dev, prop); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy); + goto unregister_notifier; + } + tegra->phys[j++] = phy; + } + + /* Setup IPFS access and BAR0 space */ + tegra_xhci_cfg(tegra); + + ret = tegra_xhci_phy_enable(tegra); + if (ret < 0) + goto unregister_notifier; + + ret = request_firmware_nowait(THIS_MODULE, true, + tegra->soc_config->firmware_file, + tegra->dev, GFP_KERNEL, tegra, + tegra_xhci_probe_finish); + if (ret < 0) + goto disable_phy; + + return 0; + +disable_phy: + tegra_xhci_phy_disable(tegra); +unregister_notifier: + tegra_xusb_mbox_unregister_notifier(tegra->mbox, &tegra->mbox_nb); +disable_regulator: + tegra_xhci_regulator_disable(tegra); +disable_clk: + tegra_xhci_clk_disable(tegra); +put_hcd: + usb_put_hcd(hcd); + return ret; +} + +static int tegra_xhci_remove(struct platform_device *pdev) +{ + struct tegra_xhci_hcd *tegra = platform_get_drvdata(pdev); + struct usb_hcd *hcd = tegra->hcd; + struct xhci_hcd *xhci; + + if (tegra->fw_loaded) { + xhci = hcd_to_xhci(hcd); + usb_remove_hcd(xhci->shared_hcd); + usb_put_hcd(xhci->shared_hcd); + usb_remove_hcd(hcd); + usb_put_hcd(hcd); + kfree(xhci); + } else if (hcd) { + /* Unbound after probe(), but before firmware loading. */ + usb_put_hcd(hcd); + } + + if (tegra->fw_data) + dma_free_coherent(tegra->dev, tegra->fw_size, tegra->fw_data, + tegra->fw_dma_addr); + + tegra_xusb_mbox_unregister_notifier(tegra->mbox, &tegra->mbox_nb); + tegra_xhci_phy_disable(tegra); + tegra_xhci_regulator_disable(tegra); + tegra_xhci_clk_disable(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"); -- 2.0.0.526.g5318336 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
