| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * NVIDIA Tegra xHCI host controller driver |
| * |
| * Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved. |
| * Copyright (C) 2014 Google, Inc. |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/firmware.h> |
| #include <linux/interrupt.h> |
| #include <linux/iopoll.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/of_irq.h> |
| #include <linux/phy/phy.h> |
| #include <linux/phy/tegra/xusb.h> |
| #include <linux/platform_device.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/pm.h> |
| #include <linux/pm_domain.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/reset.h> |
| #include <linux/slab.h> |
| #include <linux/usb/otg.h> |
| #include <linux/usb/phy.h> |
| #include <linux/usb/role.h> |
| #include <soc/tegra/pmc.h> |
| |
| #include "xhci.h" |
| |
| #define TEGRA_XHCI_SS_HIGH_SPEED 120000000 |
| #define TEGRA_XHCI_SS_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_BASE_ADDR_SHIFT 15 |
| #define XUSB_BASE_ADDR_MASK 0x1ffff |
| #define XUSB_CFG_16 0x040 |
| #define XUSB_CFG_24 0x060 |
| #define XUSB_CFG_AXI_CFG 0x0f8 |
| #define XUSB_CFG_ARU_C11_CSBRANGE 0x41c |
| #define XUSB_CFG_ARU_CONTEXT 0x43c |
| #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_CSB_BASE_ADDR 0x800 |
| |
| /* FPCI mailbox registers */ |
| /* XUSB_CFG_ARU_MBOX_CMD */ |
| #define MBOX_DEST_FALC BIT(27) |
| #define MBOX_DEST_PME BIT(28) |
| #define MBOX_DEST_SMI BIT(29) |
| #define MBOX_DEST_XHCI BIT(30) |
| #define MBOX_INT_EN BIT(31) |
| /* XUSB_CFG_ARU_MBOX_DATA_IN and XUSB_CFG_ARU_MBOX_DATA_OUT */ |
| #define CMD_DATA_SHIFT 0 |
| #define CMD_DATA_MASK 0xffffff |
| #define CMD_TYPE_SHIFT 24 |
| #define CMD_TYPE_MASK 0xff |
| /* XUSB_CFG_ARU_MBOX_OWNER */ |
| #define MBOX_OWNER_NONE 0 |
| #define MBOX_OWNER_FW 1 |
| #define MBOX_OWNER_SW 2 |
| #define XUSB_CFG_ARU_SMI_INTR 0x428 |
| #define MBOX_SMI_INTR_FW_HANG BIT(1) |
| #define MBOX_SMI_INTR_EN BIT(3) |
| |
| /* IPFS registers */ |
| #define IPFS_XUSB_HOST_MSI_BAR_SZ_0 0x0c0 |
| #define IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0 0x0c4 |
| #define IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0 0x0c8 |
| #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_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 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 CPUCTL_STATE_STOPPED BIT(5) |
| #define XUSB_FALC_BOOTVEC 0x104 |
| #define XUSB_FALC_DMACTL 0x10c |
| #define XUSB_FALC_IMFILLRNG1 0x154 |
| #define IMFILLRNG1_TAG_MASK 0xffff |
| #define IMFILLRNG1_TAG_LO_SHIFT 0 |
| #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_MEMPOOL_L2IMEMOP_RESULT 0x101a18 |
| #define L2IMEMOP_RESULT_VLD BIT(31) |
| #define XUSB_CSB_MP_APMAP 0x10181c |
| #define APMAP_BOOTPATH BIT(31) |
| |
| #define IMEM_BLOCK_SIZE 256 |
| |
| struct tegra_xusb_fw_header { |
| __le32 boot_loadaddr_in_imem; |
| __le32 boot_codedfi_offset; |
| __le32 boot_codetag; |
| __le32 boot_codesize; |
| __le32 phys_memaddr; |
| __le16 reqphys_memsize; |
| __le16 alloc_phys_memsize; |
| __le32 rodata_img_offset; |
| __le32 rodata_section_start; |
| __le32 rodata_section_end; |
| __le32 main_fnaddr; |
| __le32 fwimg_cksum; |
| __le32 fwimg_created_time; |
| __le32 imem_resident_start; |
| __le32 imem_resident_end; |
| __le32 idirect_start; |
| __le32 idirect_end; |
| __le32 l2_imem_start; |
| __le32 l2_imem_end; |
| __le32 version_id; |
| u8 init_ddirect; |
| u8 reserved[3]; |
| __le32 phys_addr_log_buffer; |
| __le32 total_log_entries; |
| __le32 dequeue_ptr; |
| __le32 dummy_var[2]; |
| __le32 fwimg_len; |
| u8 magic[8]; |
| __le32 ss_low_power_entry_timeout; |
| u8 num_hsic_port; |
| u8 padding[139]; /* Pad to 256 bytes */ |
| }; |
| |
| struct tegra_xusb_phy_type { |
| const char *name; |
| unsigned int num; |
| }; |
| |
| struct tegra_xusb_mbox_regs { |
| u16 cmd; |
| u16 data_in; |
| u16 data_out; |
| u16 owner; |
| }; |
| |
| struct tegra_xusb_context_soc { |
| struct { |
| const unsigned int *offsets; |
| unsigned int num_offsets; |
| } ipfs; |
| |
| struct { |
| const unsigned int *offsets; |
| unsigned int num_offsets; |
| } fpci; |
| }; |
| |
| struct tegra_xusb_soc { |
| const char *firmware; |
| const char * const *supply_names; |
| unsigned int num_supplies; |
| const struct tegra_xusb_phy_type *phy_types; |
| unsigned int num_types; |
| const struct tegra_xusb_context_soc *context; |
| |
| struct { |
| struct { |
| unsigned int offset; |
| unsigned int count; |
| } usb2, ulpi, hsic, usb3; |
| } ports; |
| |
| struct tegra_xusb_mbox_regs mbox; |
| |
| bool scale_ss_clock; |
| bool has_ipfs; |
| bool lpm_support; |
| bool otg_reset_sspi; |
| }; |
| |
| struct tegra_xusb_context { |
| u32 *ipfs; |
| u32 *fpci; |
| }; |
| |
| struct tegra_xusb { |
| struct device *dev; |
| void __iomem *regs; |
| struct usb_hcd *hcd; |
| |
| struct mutex lock; |
| |
| int xhci_irq; |
| int mbox_irq; |
| int padctl_irq; |
| |
| void __iomem *ipfs_base; |
| void __iomem *fpci_base; |
| |
| const struct tegra_xusb_soc *soc; |
| |
| struct regulator_bulk_data *supplies; |
| |
| struct tegra_xusb_padctl *padctl; |
| |
| struct clk *host_clk; |
| struct clk *falcon_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 device *genpd_dev_host; |
| struct device *genpd_dev_ss; |
| bool use_genpd; |
| |
| struct phy **phys; |
| unsigned int num_phys; |
| |
| struct usb_phy **usbphy; |
| unsigned int num_usb_phys; |
| int otg_usb2_port; |
| int otg_usb3_port; |
| bool host_mode; |
| struct notifier_block id_nb; |
| struct work_struct id_work; |
| |
| /* Firmware loading related */ |
| struct { |
| size_t size; |
| void *virt; |
| dma_addr_t phys; |
| } fw; |
| |
| bool suspended; |
| struct tegra_xusb_context context; |
| }; |
| |
| static struct hc_driver __read_mostly tegra_xhci_hc_driver; |
| |
| static inline u32 fpci_readl(struct tegra_xusb *tegra, unsigned int offset) |
| { |
| return readl(tegra->fpci_base + offset); |
| } |
| |
| static inline void fpci_writel(struct tegra_xusb *tegra, u32 value, |
| unsigned int offset) |
| { |
| writel(value, tegra->fpci_base + offset); |
| } |
| |
| static inline u32 ipfs_readl(struct tegra_xusb *tegra, unsigned int offset) |
| { |
| return readl(tegra->ipfs_base + offset); |
| } |
| |
| static inline void ipfs_writel(struct tegra_xusb *tegra, u32 value, |
| unsigned int offset) |
| { |
| writel(value, tegra->ipfs_base + offset); |
| } |
| |
| static u32 csb_readl(struct tegra_xusb *tegra, unsigned int offset) |
| { |
| u32 page = CSB_PAGE_SELECT(offset); |
| u32 ofs = CSB_PAGE_OFFSET(offset); |
| |
| fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE); |
| |
| return fpci_readl(tegra, XUSB_CFG_CSB_BASE_ADDR + ofs); |
| } |
| |
| static void csb_writel(struct tegra_xusb *tegra, u32 value, |
| unsigned int offset) |
| { |
| u32 page = CSB_PAGE_SELECT(offset); |
| u32 ofs = CSB_PAGE_OFFSET(offset); |
| |
| fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE); |
| fpci_writel(tegra, value, XUSB_CFG_CSB_BASE_ADDR + ofs); |
| } |
| |
| static int tegra_xusb_set_ss_clk(struct tegra_xusb *tegra, |
| unsigned long rate) |
| { |
| unsigned long new_parent_rate, old_parent_rate; |
| struct clk *clk = tegra->ss_src_clk; |
| unsigned int div; |
| int err; |
| |
| if (clk_get_rate(clk) == rate) |
| return 0; |
| |
| switch (rate) { |
| case TEGRA_XHCI_SS_HIGH_SPEED: |
| /* |
| * Reparent to PLLU_480M. Set divider 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; |
| |
| err = clk_set_rate(clk, old_parent_rate / div); |
| if (err) |
| return err; |
| |
| err = clk_set_parent(clk, tegra->pll_u_480m); |
| if (err) |
| return err; |
| |
| /* |
| * The rate should already be correct, but set it again just |
| * to be sure. |
| */ |
| err = clk_set_rate(clk, rate); |
| if (err) |
| return err; |
| |
| break; |
| |
| case TEGRA_XHCI_SS_LOW_SPEED: |
| /* Reparent to CLK_M */ |
| err = clk_set_parent(clk, tegra->clk_m); |
| if (err) |
| return err; |
| |
| err = clk_set_rate(clk, rate); |
| if (err) |
| return err; |
| |
| break; |
| |
| default: |
| dev_err(tegra->dev, "Invalid SS rate: %lu Hz\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 unsigned long extract_field(u32 value, unsigned int start, |
| unsigned int count) |
| { |
| return (value >> start) & ((1 << count) - 1); |
| } |
| |
| /* 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_RESET_SSPI, |
| MBOX_CMD_DISABLE_SS_LFPS_DETECTION, |
| MBOX_CMD_ENABLE_SS_LFPS_DETECTION, |
| |
| MBOX_CMD_MAX, |
| |
| /* Response message to above commands */ |
| MBOX_CMD_ACK = 128, |
| MBOX_CMD_NAK |
| }; |
| |
| struct tegra_xusb_mbox_msg { |
| u32 cmd; |
| u32 data; |
| }; |
| |
| static inline u32 tegra_xusb_mbox_pack(const struct tegra_xusb_mbox_msg *msg) |
| { |
| return (msg->cmd & CMD_TYPE_MASK) << CMD_TYPE_SHIFT | |
| (msg->data & CMD_DATA_MASK) << CMD_DATA_SHIFT; |
| } |
| static inline void tegra_xusb_mbox_unpack(struct tegra_xusb_mbox_msg *msg, |
| u32 value) |
| { |
| msg->cmd = (value >> CMD_TYPE_SHIFT) & CMD_TYPE_MASK; |
| msg->data = (value >> CMD_DATA_SHIFT) & CMD_DATA_MASK; |
| } |
| |
| static bool tegra_xusb_mbox_cmd_requires_ack(enum tegra_xusb_mbox_cmd cmd) |
| { |
| switch (cmd) { |
| case MBOX_CMD_SET_BW: |
| case MBOX_CMD_ACK: |
| case MBOX_CMD_NAK: |
| return false; |
| |
| default: |
| return true; |
| } |
| } |
| |
| static int tegra_xusb_mbox_send(struct tegra_xusb *tegra, |
| const struct tegra_xusb_mbox_msg *msg) |
| { |
| bool wait_for_idle = false; |
| u32 value; |
| |
| /* |
| * Acquire the mailbox. The firmware still owns the mailbox for |
| * ACK/NAK messages. |
| */ |
| if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) { |
| value = fpci_readl(tegra, tegra->soc->mbox.owner); |
| if (value != MBOX_OWNER_NONE) { |
| dev_err(tegra->dev, "mailbox is busy\n"); |
| return -EBUSY; |
| } |
| |
| fpci_writel(tegra, MBOX_OWNER_SW, tegra->soc->mbox.owner); |
| |
| value = fpci_readl(tegra, tegra->soc->mbox.owner); |
| if (value != MBOX_OWNER_SW) { |
| dev_err(tegra->dev, "failed to acquire mailbox\n"); |
| return -EBUSY; |
| } |
| |
| wait_for_idle = true; |
| } |
| |
| value = tegra_xusb_mbox_pack(msg); |
| fpci_writel(tegra, value, tegra->soc->mbox.data_in); |
| |
| value = fpci_readl(tegra, tegra->soc->mbox.cmd); |
| value |= MBOX_INT_EN | MBOX_DEST_FALC; |
| fpci_writel(tegra, value, tegra->soc->mbox.cmd); |
| |
| if (wait_for_idle) { |
| unsigned long timeout = jiffies + msecs_to_jiffies(250); |
| |
| while (time_before(jiffies, timeout)) { |
| value = fpci_readl(tegra, tegra->soc->mbox.owner); |
| if (value == MBOX_OWNER_NONE) |
| break; |
| |
| usleep_range(10, 20); |
| } |
| |
| if (time_after(jiffies, timeout)) |
| value = fpci_readl(tegra, tegra->soc->mbox.owner); |
| |
| if (value != MBOX_OWNER_NONE) |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static irqreturn_t tegra_xusb_mbox_irq(int irq, void *data) |
| { |
| struct tegra_xusb *tegra = data; |
| u32 value; |
| |
| /* clear mailbox interrupts */ |
| value = fpci_readl(tegra, XUSB_CFG_ARU_SMI_INTR); |
| fpci_writel(tegra, value, XUSB_CFG_ARU_SMI_INTR); |
| |
| if (value & MBOX_SMI_INTR_FW_HANG) |
| dev_err(tegra->dev, "controller firmware hang\n"); |
| |
| return IRQ_WAKE_THREAD; |
| } |
| |
| static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra, |
| const struct tegra_xusb_mbox_msg *msg) |
| { |
| struct tegra_xusb_padctl *padctl = tegra->padctl; |
| const struct tegra_xusb_soc *soc = tegra->soc; |
| struct device *dev = tegra->dev; |
| struct tegra_xusb_mbox_msg rsp; |
| unsigned long mask; |
| unsigned int port; |
| bool idle, enable; |
| int err = 0; |
| |
| memset(&rsp, 0, sizeof(rsp)); |
| |
| switch (msg->cmd) { |
| case MBOX_CMD_INC_FALC_CLOCK: |
| case MBOX_CMD_DEC_FALC_CLOCK: |
| rsp.data = clk_get_rate(tegra->falcon_clk) / 1000; |
| if (rsp.data != msg->data) |
| rsp.cmd = MBOX_CMD_NAK; |
| else |
| rsp.cmd = MBOX_CMD_ACK; |
| |
| break; |
| |
| case MBOX_CMD_INC_SSPI_CLOCK: |
| case MBOX_CMD_DEC_SSPI_CLOCK: |
| if (tegra->soc->scale_ss_clock) { |
| err = tegra_xusb_set_ss_clk(tegra, msg->data * 1000); |
| if (err < 0) |
| rsp.cmd = MBOX_CMD_NAK; |
| else |
| rsp.cmd = MBOX_CMD_ACK; |
| |
| rsp.data = clk_get_rate(tegra->ss_src_clk) / 1000; |
| } else { |
| rsp.cmd = MBOX_CMD_ACK; |
| rsp.data = msg->data; |
| } |
| |
| break; |
| |
| case MBOX_CMD_SET_BW: |
| /* |
| * TODO: Request bandwidth once EMC scaling is supported. |
| * Ignore for now since ACK/NAK is not required for SET_BW |
| * messages. |
| */ |
| break; |
| |
| case MBOX_CMD_SAVE_DFE_CTLE_CTX: |
| err = tegra_xusb_padctl_usb3_save_context(padctl, msg->data); |
| if (err < 0) { |
| dev_err(dev, "failed to save context for USB3#%u: %d\n", |
| msg->data, err); |
| rsp.cmd = MBOX_CMD_NAK; |
| } else { |
| rsp.cmd = MBOX_CMD_ACK; |
| } |
| |
| rsp.data = msg->data; |
| break; |
| |
| case MBOX_CMD_START_HSIC_IDLE: |
| case MBOX_CMD_STOP_HSIC_IDLE: |
| if (msg->cmd == MBOX_CMD_STOP_HSIC_IDLE) |
| idle = false; |
| else |
| idle = true; |
| |
| mask = extract_field(msg->data, 1 + soc->ports.hsic.offset, |
| soc->ports.hsic.count); |
| |
| for_each_set_bit(port, &mask, 32) { |
| err = tegra_xusb_padctl_hsic_set_idle(padctl, port, |
| idle); |
| if (err < 0) |
| break; |
| } |
| |
| if (err < 0) { |
| dev_err(dev, "failed to set HSIC#%u %s: %d\n", port, |
| idle ? "idle" : "busy", err); |
| rsp.cmd = MBOX_CMD_NAK; |
| } else { |
| rsp.cmd = MBOX_CMD_ACK; |
| } |
| |
| rsp.data = msg->data; |
| break; |
| |
| case MBOX_CMD_DISABLE_SS_LFPS_DETECTION: |
| case MBOX_CMD_ENABLE_SS_LFPS_DETECTION: |
| if (msg->cmd == MBOX_CMD_DISABLE_SS_LFPS_DETECTION) |
| enable = false; |
| else |
| enable = true; |
| |
| mask = extract_field(msg->data, 1 + soc->ports.usb3.offset, |
| soc->ports.usb3.count); |
| |
| for_each_set_bit(port, &mask, soc->ports.usb3.count) { |
| err = tegra_xusb_padctl_usb3_set_lfps_detect(padctl, |
| port, |
| enable); |
| if (err < 0) |
| break; |
| |
| /* |
| * wait 500us for LFPS detector to be disabled before |
| * sending ACK |
| */ |
| if (!enable) |
| usleep_range(500, 1000); |
| } |
| |
| if (err < 0) { |
| dev_err(dev, |
| "failed to %s LFPS detection on USB3#%u: %d\n", |
| enable ? "enable" : "disable", port, err); |
| rsp.cmd = MBOX_CMD_NAK; |
| } else { |
| rsp.cmd = MBOX_CMD_ACK; |
| } |
| |
| rsp.data = msg->data; |
| break; |
| |
| default: |
| dev_warn(dev, "unknown message: %#x\n", msg->cmd); |
| break; |
| } |
| |
| if (rsp.cmd) { |
| const char *cmd = (rsp.cmd == MBOX_CMD_ACK) ? "ACK" : "NAK"; |
| |
| err = tegra_xusb_mbox_send(tegra, &rsp); |
| if (err < 0) |
| dev_err(dev, "failed to send %s: %d\n", cmd, err); |
| } |
| } |
| |
| static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data) |
| { |
| struct tegra_xusb *tegra = data; |
| struct tegra_xusb_mbox_msg msg; |
| u32 value; |
| |
| mutex_lock(&tegra->lock); |
| |
| if (pm_runtime_suspended(tegra->dev) || tegra->suspended) |
| goto out; |
| |
| value = fpci_readl(tegra, tegra->soc->mbox.data_out); |
| tegra_xusb_mbox_unpack(&msg, value); |
| |
| value = fpci_readl(tegra, tegra->soc->mbox.cmd); |
| value &= ~MBOX_DEST_SMI; |
| fpci_writel(tegra, value, tegra->soc->mbox.cmd); |
| |
| /* clear mailbox owner if no ACK/NAK is required */ |
| if (!tegra_xusb_mbox_cmd_requires_ack(msg.cmd)) |
| fpci_writel(tegra, MBOX_OWNER_NONE, tegra->soc->mbox.owner); |
| |
| tegra_xusb_mbox_handle(tegra, &msg); |
| |
| out: |
| mutex_unlock(&tegra->lock); |
| return IRQ_HANDLED; |
| } |
| |
| static void tegra_xusb_config(struct tegra_xusb *tegra) |
| { |
| u32 regs = tegra->hcd->rsrc_start; |
| u32 value; |
| |
| if (tegra->soc->has_ipfs) { |
| value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0); |
| value |= IPFS_EN_FPCI; |
| ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0); |
| |
| usleep_range(10, 20); |
| } |
| |
| /* Program BAR0 space */ |
| value = fpci_readl(tegra, XUSB_CFG_4); |
| value &= ~(XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT); |
| value |= regs & (XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT); |
| fpci_writel(tegra, value, XUSB_CFG_4); |
| |
| usleep_range(100, 200); |
| |
| /* Enable bus master */ |
| value = fpci_readl(tegra, XUSB_CFG_1); |
| value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN; |
| fpci_writel(tegra, value, XUSB_CFG_1); |
| |
| if (tegra->soc->has_ipfs) { |
| /* Enable interrupt assertion */ |
| value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0); |
| value |= IPFS_IP_INT_MASK; |
| ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0); |
| |
| /* Set hysteresis */ |
| ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0); |
| } |
| } |
| |
| static int tegra_xusb_clk_enable(struct tegra_xusb *tegra) |
| { |
| int err; |
| |
| err = clk_prepare_enable(tegra->pll_e); |
| if (err < 0) |
| return err; |
| |
| err = clk_prepare_enable(tegra->host_clk); |
| if (err < 0) |
| goto disable_plle; |
| |
| err = clk_prepare_enable(tegra->ss_clk); |
| if (err < 0) |
| goto disable_host; |
| |
| err = clk_prepare_enable(tegra->falcon_clk); |
| if (err < 0) |
| goto disable_ss; |
| |
| err = clk_prepare_enable(tegra->fs_src_clk); |
| if (err < 0) |
| goto disable_falc; |
| |
| err = clk_prepare_enable(tegra->hs_src_clk); |
| if (err < 0) |
| goto disable_fs_src; |
| |
| if (tegra->soc->scale_ss_clock) { |
| err = tegra_xusb_set_ss_clk(tegra, TEGRA_XHCI_SS_HIGH_SPEED); |
| if (err < 0) |
| goto disable_hs_src; |
| } |
| |
| return 0; |
| |
| disable_hs_src: |
| clk_disable_unprepare(tegra->hs_src_clk); |
| disable_fs_src: |
| clk_disable_unprepare(tegra->fs_src_clk); |
| disable_falc: |
| clk_disable_unprepare(tegra->falcon_clk); |
| disable_ss: |
| clk_disable_unprepare(tegra->ss_clk); |
| disable_host: |
| clk_disable_unprepare(tegra->host_clk); |
| disable_plle: |
| clk_disable_unprepare(tegra->pll_e); |
| return err; |
| } |
| |
| static void tegra_xusb_clk_disable(struct tegra_xusb *tegra) |
| { |
| clk_disable_unprepare(tegra->pll_e); |
| clk_disable_unprepare(tegra->host_clk); |
| clk_disable_unprepare(tegra->ss_clk); |
| clk_disable_unprepare(tegra->falcon_clk); |
| clk_disable_unprepare(tegra->fs_src_clk); |
| clk_disable_unprepare(tegra->hs_src_clk); |
| } |
| |
| static int tegra_xusb_phy_enable(struct tegra_xusb *tegra) |
| { |
| unsigned int i; |
| int err; |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| err = phy_init(tegra->phys[i]); |
| if (err) |
| goto disable_phy; |
| |
| err = phy_power_on(tegra->phys[i]); |
| if (err) { |
| phy_exit(tegra->phys[i]); |
| goto disable_phy; |
| } |
| } |
| |
| return 0; |
| |
| disable_phy: |
| while (i--) { |
| phy_power_off(tegra->phys[i]); |
| phy_exit(tegra->phys[i]); |
| } |
| |
| return err; |
| } |
| |
| static void tegra_xusb_phy_disable(struct tegra_xusb *tegra) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| phy_power_off(tegra->phys[i]); |
| phy_exit(tegra->phys[i]); |
| } |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int tegra_xusb_init_context(struct tegra_xusb *tegra) |
| { |
| const struct tegra_xusb_context_soc *soc = tegra->soc->context; |
| |
| tegra->context.ipfs = devm_kcalloc(tegra->dev, soc->ipfs.num_offsets, |
| sizeof(u32), GFP_KERNEL); |
| if (!tegra->context.ipfs) |
| return -ENOMEM; |
| |
| tegra->context.fpci = devm_kcalloc(tegra->dev, soc->fpci.num_offsets, |
| sizeof(u32), GFP_KERNEL); |
| if (!tegra->context.fpci) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| #else |
| static inline int tegra_xusb_init_context(struct tegra_xusb *tegra) |
| { |
| return 0; |
| } |
| #endif |
| |
| static int tegra_xusb_request_firmware(struct tegra_xusb *tegra) |
| { |
| struct tegra_xusb_fw_header *header; |
| const struct firmware *fw; |
| int err; |
| |
| err = request_firmware(&fw, tegra->soc->firmware, tegra->dev); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to request firmware: %d\n", err); |
| return err; |
| } |
| |
| /* Load Falcon controller with its firmware. */ |
| header = (struct tegra_xusb_fw_header *)fw->data; |
| tegra->fw.size = le32_to_cpu(header->fwimg_len); |
| |
| tegra->fw.virt = dma_alloc_coherent(tegra->dev, tegra->fw.size, |
| &tegra->fw.phys, GFP_KERNEL); |
| if (!tegra->fw.virt) { |
| dev_err(tegra->dev, "failed to allocate memory for firmware\n"); |
| release_firmware(fw); |
| return -ENOMEM; |
| } |
| |
| header = (struct tegra_xusb_fw_header *)tegra->fw.virt; |
| memcpy(tegra->fw.virt, fw->data, tegra->fw.size); |
| release_firmware(fw); |
| |
| return 0; |
| } |
| |
| static int tegra_xusb_load_firmware(struct tegra_xusb *tegra) |
| { |
| unsigned int code_tag_blocks, code_size_blocks, code_blocks; |
| struct xhci_cap_regs __iomem *cap = tegra->regs; |
| struct tegra_xusb_fw_header *header; |
| struct device *dev = tegra->dev; |
| struct xhci_op_regs __iomem *op; |
| unsigned long timeout; |
| time64_t timestamp; |
| u64 address; |
| u32 value; |
| int err; |
| |
| header = (struct tegra_xusb_fw_header *)tegra->fw.virt; |
| op = tegra->regs + HC_LENGTH(readl(&cap->hc_capbase)); |
| |
| if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) { |
| dev_info(dev, "Firmware already loaded, Falcon state %#x\n", |
| csb_readl(tegra, XUSB_FALC_CPUCTL)); |
| return 0; |
| } |
| |
| /* 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. |
| */ |
| address = tegra->fw.phys + sizeof(*header); |
| csb_writel(tegra, address >> 32, XUSB_CSB_MP_ILOAD_BASE_HI); |
| csb_writel(tegra, address, XUSB_CSB_MP_ILOAD_BASE_LO); |
| |
| /* 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. |
| */ |
| code_tag_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codetag), |
| IMEM_BLOCK_SIZE); |
| code_size_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codesize), |
| IMEM_BLOCK_SIZE); |
| code_blocks = code_tag_blocks + code_size_blocks; |
| |
| value = ((code_tag_blocks & L2IMEMOP_SIZE_SRC_OFFSET_MASK) << |
| L2IMEMOP_SIZE_SRC_OFFSET_SHIFT) | |
| ((code_size_blocks & L2IMEMOP_SIZE_SRC_COUNT_MASK) << |
| L2IMEMOP_SIZE_SRC_COUNT_SHIFT); |
| csb_writel(tegra, value, 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. */ |
| csb_writel(tegra, code_size_blocks, XUSB_FALC_IMFILLCTL); |
| |
| value = ((code_tag_blocks & IMFILLRNG1_TAG_MASK) << |
| IMFILLRNG1_TAG_LO_SHIFT) | |
| ((code_blocks & IMFILLRNG1_TAG_MASK) << |
| IMFILLRNG1_TAG_HI_SHIFT); |
| csb_writel(tegra, value, XUSB_FALC_IMFILLRNG1); |
| |
| csb_writel(tegra, 0, XUSB_FALC_DMACTL); |
| |
| /* wait for RESULT_VLD to get set */ |
| #define tegra_csb_readl(offset) csb_readl(tegra, offset) |
| err = readx_poll_timeout(tegra_csb_readl, |
| XUSB_CSB_MEMPOOL_L2IMEMOP_RESULT, value, |
| value & L2IMEMOP_RESULT_VLD, 100, 10000); |
| if (err < 0) { |
| dev_err(dev, "DMA controller not ready %#010x\n", value); |
| return err; |
| } |
| #undef tegra_csb_readl |
| |
| csb_writel(tegra, le32_to_cpu(header->boot_codetag), |
| XUSB_FALC_BOOTVEC); |
| |
| /* Boot Falcon CPU and wait for USBSTS_CNR to get cleared. */ |
| csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL); |
| |
| timeout = jiffies + msecs_to_jiffies(200); |
| |
| do { |
| value = readl(&op->status); |
| if ((value & STS_CNR) == 0) |
| break; |
| |
| usleep_range(1000, 2000); |
| } while (time_is_after_jiffies(timeout)); |
| |
| value = readl(&op->status); |
| if (value & STS_CNR) { |
| value = csb_readl(tegra, XUSB_FALC_CPUCTL); |
| dev_err(dev, "XHCI controller not read: %#010x\n", value); |
| return -EIO; |
| } |
| |
| timestamp = le32_to_cpu(header->fwimg_created_time); |
| |
| dev_info(dev, "Firmware timestamp: %ptTs UTC\n", ×tamp); |
| |
| return 0; |
| } |
| |
| static void tegra_xusb_powerdomain_remove(struct device *dev, |
| struct tegra_xusb *tegra) |
| { |
| if (!tegra->use_genpd) |
| return; |
| |
| if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss)) |
| dev_pm_domain_detach(tegra->genpd_dev_ss, true); |
| if (!IS_ERR_OR_NULL(tegra->genpd_dev_host)) |
| dev_pm_domain_detach(tegra->genpd_dev_host, true); |
| } |
| |
| static int tegra_xusb_powerdomain_init(struct device *dev, |
| struct tegra_xusb *tegra) |
| { |
| int err; |
| |
| tegra->genpd_dev_host = dev_pm_domain_attach_by_name(dev, "xusb_host"); |
| if (IS_ERR(tegra->genpd_dev_host)) { |
| err = PTR_ERR(tegra->genpd_dev_host); |
| dev_err(dev, "failed to get host pm-domain: %d\n", err); |
| return err; |
| } |
| |
| tegra->genpd_dev_ss = dev_pm_domain_attach_by_name(dev, "xusb_ss"); |
| if (IS_ERR(tegra->genpd_dev_ss)) { |
| err = PTR_ERR(tegra->genpd_dev_ss); |
| dev_err(dev, "failed to get superspeed pm-domain: %d\n", err); |
| return err; |
| } |
| |
| tegra->use_genpd = true; |
| |
| return 0; |
| } |
| |
| static int tegra_xusb_unpowergate_partitions(struct tegra_xusb *tegra) |
| { |
| struct device *dev = tegra->dev; |
| int rc; |
| |
| if (tegra->use_genpd) { |
| rc = pm_runtime_resume_and_get(tegra->genpd_dev_ss); |
| if (rc < 0) { |
| dev_err(dev, "failed to enable XUSB SS partition\n"); |
| return rc; |
| } |
| |
| rc = pm_runtime_resume_and_get(tegra->genpd_dev_host); |
| if (rc < 0) { |
| dev_err(dev, "failed to enable XUSB Host partition\n"); |
| pm_runtime_put_sync(tegra->genpd_dev_ss); |
| return rc; |
| } |
| } else { |
| rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA, |
| tegra->ss_clk, |
| tegra->ss_rst); |
| if (rc < 0) { |
| dev_err(dev, "failed to enable XUSB SS partition\n"); |
| return rc; |
| } |
| |
| rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC, |
| tegra->host_clk, |
| tegra->host_rst); |
| if (rc < 0) { |
| dev_err(dev, "failed to enable XUSB Host partition\n"); |
| tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int tegra_xusb_powergate_partitions(struct tegra_xusb *tegra) |
| { |
| struct device *dev = tegra->dev; |
| int rc; |
| |
| if (tegra->use_genpd) { |
| rc = pm_runtime_put_sync(tegra->genpd_dev_host); |
| if (rc < 0) { |
| dev_err(dev, "failed to disable XUSB Host partition\n"); |
| return rc; |
| } |
| |
| rc = pm_runtime_put_sync(tegra->genpd_dev_ss); |
| if (rc < 0) { |
| dev_err(dev, "failed to disable XUSB SS partition\n"); |
| pm_runtime_get_sync(tegra->genpd_dev_host); |
| return rc; |
| } |
| } else { |
| rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC); |
| if (rc < 0) { |
| dev_err(dev, "failed to disable XUSB Host partition\n"); |
| return rc; |
| } |
| |
| rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA); |
| if (rc < 0) { |
| dev_err(dev, "failed to disable XUSB SS partition\n"); |
| tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC, |
| tegra->host_clk, |
| tegra->host_rst); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int __tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra) |
| { |
| struct tegra_xusb_mbox_msg msg; |
| int err; |
| |
| /* Enable firmware messages from controller. */ |
| msg.cmd = MBOX_CMD_MSG_ENABLED; |
| msg.data = 0; |
| |
| err = tegra_xusb_mbox_send(tegra, &msg); |
| if (err < 0) |
| dev_err(tegra->dev, "failed to enable messages: %d\n", err); |
| |
| return err; |
| } |
| |
| static irqreturn_t tegra_xusb_padctl_irq(int irq, void *data) |
| { |
| struct tegra_xusb *tegra = data; |
| |
| mutex_lock(&tegra->lock); |
| |
| if (tegra->suspended) { |
| mutex_unlock(&tegra->lock); |
| return IRQ_HANDLED; |
| } |
| |
| mutex_unlock(&tegra->lock); |
| |
| pm_runtime_resume(tegra->dev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra) |
| { |
| int err; |
| |
| mutex_lock(&tegra->lock); |
| err = __tegra_xusb_enable_firmware_messages(tegra); |
| mutex_unlock(&tegra->lock); |
| |
| return err; |
| } |
| |
| static void tegra_xhci_set_port_power(struct tegra_xusb *tegra, bool main, |
| bool set) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| struct usb_hcd *hcd = main ? xhci->main_hcd : xhci->shared_hcd; |
| unsigned int wait = (!main && !set) ? 1000 : 10; |
| u16 typeReq = set ? SetPortFeature : ClearPortFeature; |
| u16 wIndex = main ? tegra->otg_usb2_port + 1 : tegra->otg_usb3_port + 1; |
| u32 status; |
| u32 stat_power = main ? USB_PORT_STAT_POWER : USB_SS_PORT_STAT_POWER; |
| u32 status_val = set ? stat_power : 0; |
| |
| dev_dbg(tegra->dev, "%s():%s %s port power\n", __func__, |
| set ? "set" : "clear", main ? "HS" : "SS"); |
| |
| hcd->driver->hub_control(hcd, typeReq, USB_PORT_FEAT_POWER, wIndex, |
| NULL, 0); |
| |
| do { |
| tegra_xhci_hc_driver.hub_control(hcd, GetPortStatus, 0, wIndex, |
| (char *) &status, sizeof(status)); |
| if (status_val == (status & stat_power)) |
| break; |
| |
| if (!main && !set) |
| usleep_range(600, 700); |
| else |
| usleep_range(10, 20); |
| } while (--wait > 0); |
| |
| if (status_val != (status & stat_power)) |
| dev_info(tegra->dev, "failed to %s %s PP %d\n", |
| set ? "set" : "clear", |
| main ? "HS" : "SS", status); |
| } |
| |
| static struct phy *tegra_xusb_get_phy(struct tegra_xusb *tegra, char *name, |
| int port) |
| { |
| unsigned int i, phy_count = 0; |
| |
| for (i = 0; i < tegra->soc->num_types; i++) { |
| if (!strncmp(tegra->soc->phy_types[i].name, name, |
| strlen(name))) |
| return tegra->phys[phy_count+port]; |
| |
| phy_count += tegra->soc->phy_types[i].num; |
| } |
| |
| return NULL; |
| } |
| |
| static void tegra_xhci_id_work(struct work_struct *work) |
| { |
| struct tegra_xusb *tegra = container_of(work, struct tegra_xusb, |
| id_work); |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| struct tegra_xusb_mbox_msg msg; |
| struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", |
| tegra->otg_usb2_port); |
| u32 status; |
| int ret; |
| |
| dev_dbg(tegra->dev, "host mode %s\n", tegra->host_mode ? "on" : "off"); |
| |
| mutex_lock(&tegra->lock); |
| |
| if (tegra->host_mode) |
| phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_HOST); |
| else |
| phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_NONE); |
| |
| mutex_unlock(&tegra->lock); |
| |
| tegra->otg_usb3_port = tegra_xusb_padctl_get_usb3_companion(tegra->padctl, |
| tegra->otg_usb2_port); |
| |
| if (tegra->host_mode) { |
| /* switch to host mode */ |
| if (tegra->otg_usb3_port >= 0) { |
| if (tegra->soc->otg_reset_sspi) { |
| /* set PP=0 */ |
| tegra_xhci_hc_driver.hub_control( |
| xhci->shared_hcd, GetPortStatus, |
| 0, tegra->otg_usb3_port+1, |
| (char *) &status, sizeof(status)); |
| if (status & USB_SS_PORT_STAT_POWER) |
| tegra_xhci_set_port_power(tegra, false, |
| false); |
| |
| /* reset OTG port SSPI */ |
| msg.cmd = MBOX_CMD_RESET_SSPI; |
| msg.data = tegra->otg_usb3_port+1; |
| |
| ret = tegra_xusb_mbox_send(tegra, &msg); |
| if (ret < 0) { |
| dev_info(tegra->dev, |
| "failed to RESET_SSPI %d\n", |
| ret); |
| } |
| } |
| |
| tegra_xhci_set_port_power(tegra, false, true); |
| } |
| |
| tegra_xhci_set_port_power(tegra, true, true); |
| |
| } else { |
| if (tegra->otg_usb3_port >= 0) |
| tegra_xhci_set_port_power(tegra, false, false); |
| |
| tegra_xhci_set_port_power(tegra, true, false); |
| } |
| } |
| |
| #if IS_ENABLED(CONFIG_PM) || IS_ENABLED(CONFIG_PM_SLEEP) |
| static bool is_usb2_otg_phy(struct tegra_xusb *tegra, unsigned int index) |
| { |
| return (tegra->usbphy[index] != NULL); |
| } |
| |
| static bool is_usb3_otg_phy(struct tegra_xusb *tegra, unsigned int index) |
| { |
| struct tegra_xusb_padctl *padctl = tegra->padctl; |
| unsigned int i; |
| int port; |
| |
| for (i = 0; i < tegra->num_usb_phys; i++) { |
| if (is_usb2_otg_phy(tegra, i)) { |
| port = tegra_xusb_padctl_get_usb3_companion(padctl, i); |
| if ((port >= 0) && (index == (unsigned int)port)) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| static bool is_host_mode_phy(struct tegra_xusb *tegra, unsigned int phy_type, unsigned int index) |
| { |
| if (strcmp(tegra->soc->phy_types[phy_type].name, "hsic") == 0) |
| return true; |
| |
| if (strcmp(tegra->soc->phy_types[phy_type].name, "usb2") == 0) { |
| if (is_usb2_otg_phy(tegra, index)) |
| return ((index == tegra->otg_usb2_port) && tegra->host_mode); |
| else |
| return true; |
| } |
| |
| if (strcmp(tegra->soc->phy_types[phy_type].name, "usb3") == 0) { |
| if (is_usb3_otg_phy(tegra, index)) |
| return ((index == tegra->otg_usb3_port) && tegra->host_mode); |
| else |
| return true; |
| } |
| |
| return false; |
| } |
| #endif |
| |
| static int tegra_xusb_get_usb2_port(struct tegra_xusb *tegra, |
| struct usb_phy *usbphy) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < tegra->num_usb_phys; i++) { |
| if (tegra->usbphy[i] && usbphy == tegra->usbphy[i]) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| static int tegra_xhci_id_notify(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct tegra_xusb *tegra = container_of(nb, struct tegra_xusb, |
| id_nb); |
| struct usb_phy *usbphy = (struct usb_phy *)data; |
| |
| dev_dbg(tegra->dev, "%s(): action is %d", __func__, usbphy->last_event); |
| |
| if ((tegra->host_mode && usbphy->last_event == USB_EVENT_ID) || |
| (!tegra->host_mode && usbphy->last_event != USB_EVENT_ID)) { |
| dev_dbg(tegra->dev, "Same role(%d) received. Ignore", |
| tegra->host_mode); |
| return NOTIFY_OK; |
| } |
| |
| tegra->otg_usb2_port = tegra_xusb_get_usb2_port(tegra, usbphy); |
| |
| tegra->host_mode = (usbphy->last_event == USB_EVENT_ID) ? true : false; |
| |
| schedule_work(&tegra->id_work); |
| |
| return NOTIFY_OK; |
| } |
| |
| static int tegra_xusb_init_usb_phy(struct tegra_xusb *tegra) |
| { |
| unsigned int i; |
| |
| tegra->usbphy = devm_kcalloc(tegra->dev, tegra->num_usb_phys, |
| sizeof(*tegra->usbphy), GFP_KERNEL); |
| if (!tegra->usbphy) |
| return -ENOMEM; |
| |
| INIT_WORK(&tegra->id_work, tegra_xhci_id_work); |
| tegra->id_nb.notifier_call = tegra_xhci_id_notify; |
| tegra->otg_usb2_port = -EINVAL; |
| tegra->otg_usb3_port = -EINVAL; |
| |
| for (i = 0; i < tegra->num_usb_phys; i++) { |
| struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i); |
| |
| if (!phy) |
| continue; |
| |
| tegra->usbphy[i] = devm_usb_get_phy_by_node(tegra->dev, |
| phy->dev.of_node, |
| &tegra->id_nb); |
| if (!IS_ERR(tegra->usbphy[i])) { |
| dev_dbg(tegra->dev, "usbphy-%d registered", i); |
| otg_set_host(tegra->usbphy[i]->otg, &tegra->hcd->self); |
| } else { |
| /* |
| * usb-phy is optional, continue if its not available. |
| */ |
| tegra->usbphy[i] = NULL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra) |
| { |
| unsigned int i; |
| |
| cancel_work_sync(&tegra->id_work); |
| |
| for (i = 0; i < tegra->num_usb_phys; i++) |
| if (tegra->usbphy[i]) |
| otg_set_host(tegra->usbphy[i]->otg, NULL); |
| } |
| |
| static int tegra_xusb_probe(struct platform_device *pdev) |
| { |
| struct of_phandle_args args; |
| struct tegra_xusb *tegra; |
| struct device_node *np; |
| struct resource *regs; |
| struct xhci_hcd *xhci; |
| unsigned int i, j, k; |
| struct phy *phy; |
| int err; |
| |
| BUILD_BUG_ON(sizeof(struct tegra_xusb_fw_header) != 256); |
| |
| tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); |
| if (!tegra) |
| return -ENOMEM; |
| |
| tegra->soc = of_device_get_match_data(&pdev->dev); |
| mutex_init(&tegra->lock); |
| tegra->dev = &pdev->dev; |
| |
| err = tegra_xusb_init_context(tegra); |
| if (err < 0) |
| return err; |
| |
| tegra->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s); |
| if (IS_ERR(tegra->regs)) |
| return PTR_ERR(tegra->regs); |
| |
| tegra->fpci_base = devm_platform_ioremap_resource(pdev, 1); |
| if (IS_ERR(tegra->fpci_base)) |
| return PTR_ERR(tegra->fpci_base); |
| |
| if (tegra->soc->has_ipfs) { |
| tegra->ipfs_base = devm_platform_ioremap_resource(pdev, 2); |
| if (IS_ERR(tegra->ipfs_base)) |
| return PTR_ERR(tegra->ipfs_base); |
| } |
| |
| tegra->xhci_irq = platform_get_irq(pdev, 0); |
| if (tegra->xhci_irq < 0) |
| return tegra->xhci_irq; |
| |
| tegra->mbox_irq = platform_get_irq(pdev, 1); |
| if (tegra->mbox_irq < 0) |
| return tegra->mbox_irq; |
| |
| tegra->padctl = tegra_xusb_padctl_get(&pdev->dev); |
| if (IS_ERR(tegra->padctl)) |
| return PTR_ERR(tegra->padctl); |
| |
| np = of_parse_phandle(pdev->dev.of_node, "nvidia,xusb-padctl", 0); |
| if (!np) { |
| err = -ENODEV; |
| goto put_padctl; |
| } |
| |
| /* Older device-trees don't have padctrl interrupt */ |
| err = of_irq_parse_one(np, 0, &args); |
| if (!err) { |
| tegra->padctl_irq = of_irq_get(np, 0); |
| if (tegra->padctl_irq <= 0) { |
| err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq; |
| goto put_padctl; |
| } |
| } else { |
| dev_dbg(&pdev->dev, |
| "%pOF is missing an interrupt, disabling PM support\n", np); |
| } |
| |
| tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host"); |
| if (IS_ERR(tegra->host_clk)) { |
| err = PTR_ERR(tegra->host_clk); |
| dev_err(&pdev->dev, "failed to get xusb_host: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->falcon_clk = devm_clk_get(&pdev->dev, "xusb_falcon_src"); |
| if (IS_ERR(tegra->falcon_clk)) { |
| err = PTR_ERR(tegra->falcon_clk); |
| dev_err(&pdev->dev, "failed to get xusb_falcon_src: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->ss_clk = devm_clk_get(&pdev->dev, "xusb_ss"); |
| if (IS_ERR(tegra->ss_clk)) { |
| err = PTR_ERR(tegra->ss_clk); |
| dev_err(&pdev->dev, "failed to get xusb_ss: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->ss_src_clk = devm_clk_get(&pdev->dev, "xusb_ss_src"); |
| if (IS_ERR(tegra->ss_src_clk)) { |
| err = PTR_ERR(tegra->ss_src_clk); |
| dev_err(&pdev->dev, "failed to get xusb_ss_src: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->hs_src_clk = devm_clk_get(&pdev->dev, "xusb_hs_src"); |
| if (IS_ERR(tegra->hs_src_clk)) { |
| err = PTR_ERR(tegra->hs_src_clk); |
| dev_err(&pdev->dev, "failed to get xusb_hs_src: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->fs_src_clk = devm_clk_get(&pdev->dev, "xusb_fs_src"); |
| if (IS_ERR(tegra->fs_src_clk)) { |
| err = PTR_ERR(tegra->fs_src_clk); |
| dev_err(&pdev->dev, "failed to get xusb_fs_src: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->pll_u_480m = devm_clk_get(&pdev->dev, "pll_u_480m"); |
| if (IS_ERR(tegra->pll_u_480m)) { |
| err = PTR_ERR(tegra->pll_u_480m); |
| dev_err(&pdev->dev, "failed to get pll_u_480m: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->clk_m = devm_clk_get(&pdev->dev, "clk_m"); |
| if (IS_ERR(tegra->clk_m)) { |
| err = PTR_ERR(tegra->clk_m); |
| dev_err(&pdev->dev, "failed to get clk_m: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->pll_e = devm_clk_get(&pdev->dev, "pll_e"); |
| if (IS_ERR(tegra->pll_e)) { |
| err = PTR_ERR(tegra->pll_e); |
| dev_err(&pdev->dev, "failed to get pll_e: %d\n", err); |
| goto put_padctl; |
| } |
| |
| if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) { |
| tegra->host_rst = devm_reset_control_get(&pdev->dev, |
| "xusb_host"); |
| if (IS_ERR(tegra->host_rst)) { |
| err = PTR_ERR(tegra->host_rst); |
| dev_err(&pdev->dev, |
| "failed to get xusb_host reset: %d\n", err); |
| goto put_padctl; |
| } |
| |
| tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss"); |
| if (IS_ERR(tegra->ss_rst)) { |
| err = PTR_ERR(tegra->ss_rst); |
| dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n", |
| err); |
| goto put_padctl; |
| } |
| } else { |
| err = tegra_xusb_powerdomain_init(&pdev->dev, tegra); |
| if (err) |
| goto put_powerdomains; |
| } |
| |
| tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies, |
| sizeof(*tegra->supplies), GFP_KERNEL); |
| if (!tegra->supplies) { |
| err = -ENOMEM; |
| goto put_powerdomains; |
| } |
| |
| regulator_bulk_set_supply_names(tegra->supplies, |
| tegra->soc->supply_names, |
| tegra->soc->num_supplies); |
| |
| err = devm_regulator_bulk_get(&pdev->dev, tegra->soc->num_supplies, |
| tegra->supplies); |
| if (err) { |
| dev_err(&pdev->dev, "failed to get regulators: %d\n", err); |
| goto put_powerdomains; |
| } |
| |
| for (i = 0; i < tegra->soc->num_types; i++) { |
| if (!strncmp(tegra->soc->phy_types[i].name, "usb2", 4)) |
| tegra->num_usb_phys = tegra->soc->phy_types[i].num; |
| tegra->num_phys += tegra->soc->phy_types[i].num; |
| } |
| |
| tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys, |
| sizeof(*tegra->phys), GFP_KERNEL); |
| if (!tegra->phys) { |
| err = -ENOMEM; |
| goto put_powerdomains; |
| } |
| |
| for (i = 0, k = 0; i < tegra->soc->num_types; i++) { |
| char prop[8]; |
| |
| for (j = 0; j < tegra->soc->phy_types[i].num; j++) { |
| snprintf(prop, sizeof(prop), "%s-%d", |
| tegra->soc->phy_types[i].name, j); |
| |
| phy = devm_phy_optional_get(&pdev->dev, prop); |
| if (IS_ERR(phy)) { |
| dev_err(&pdev->dev, |
| "failed to get PHY %s: %ld\n", prop, |
| PTR_ERR(phy)); |
| err = PTR_ERR(phy); |
| goto put_powerdomains; |
| } |
| |
| tegra->phys[k++] = phy; |
| } |
| } |
| |
| tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev, |
| dev_name(&pdev->dev)); |
| if (!tegra->hcd) { |
| err = -ENOMEM; |
| goto put_powerdomains; |
| } |
| |
| tegra->hcd->skip_phy_initialization = 1; |
| tegra->hcd->regs = tegra->regs; |
| tegra->hcd->rsrc_start = regs->start; |
| tegra->hcd->rsrc_len = resource_size(regs); |
| |
| /* |
| * This must happen after usb_create_hcd(), because usb_create_hcd() |
| * will overwrite the drvdata of the device with the hcd it creates. |
| */ |
| platform_set_drvdata(pdev, tegra); |
| |
| err = tegra_xusb_clk_enable(tegra); |
| if (err) { |
| dev_err(tegra->dev, "failed to enable clocks: %d\n", err); |
| goto put_hcd; |
| } |
| |
| err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies); |
| if (err) { |
| dev_err(tegra->dev, "failed to enable regulators: %d\n", err); |
| goto disable_clk; |
| } |
| |
| err = tegra_xusb_phy_enable(tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err); |
| goto disable_regulator; |
| } |
| |
| /* |
| * The XUSB Falcon microcontroller can only address 40 bits, so set |
| * the DMA mask accordingly. |
| */ |
| err = dma_set_mask_and_coherent(tegra->dev, DMA_BIT_MASK(40)); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err); |
| goto disable_phy; |
| } |
| |
| err = tegra_xusb_request_firmware(tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to request firmware: %d\n", err); |
| goto disable_phy; |
| } |
| |
| err = tegra_xusb_unpowergate_partitions(tegra); |
| if (err) |
| goto free_firmware; |
| |
| tegra_xusb_config(tegra); |
| |
| err = tegra_xusb_load_firmware(tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to load firmware: %d\n", err); |
| goto powergate; |
| } |
| |
| err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err); |
| goto powergate; |
| } |
| |
| device_wakeup_enable(tegra->hcd->self.controller); |
| |
| xhci = hcd_to_xhci(tegra->hcd); |
| |
| xhci->shared_hcd = usb_create_shared_hcd(&tegra_xhci_hc_driver, |
| &pdev->dev, |
| dev_name(&pdev->dev), |
| tegra->hcd); |
| if (!xhci->shared_hcd) { |
| dev_err(&pdev->dev, "failed to create shared HCD\n"); |
| err = -ENOMEM; |
| goto remove_usb2; |
| } |
| |
| err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to add shared HCD: %d\n", err); |
| goto put_usb3; |
| } |
| |
| err = devm_request_threaded_irq(&pdev->dev, tegra->mbox_irq, |
| tegra_xusb_mbox_irq, |
| tegra_xusb_mbox_thread, 0, |
| dev_name(&pdev->dev), tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to request IRQ: %d\n", err); |
| goto remove_usb3; |
| } |
| |
| if (tegra->padctl_irq) { |
| err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq, |
| NULL, tegra_xusb_padctl_irq, |
| IRQF_ONESHOT, dev_name(&pdev->dev), |
| tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err); |
| goto remove_usb3; |
| } |
| } |
| |
| err = tegra_xusb_enable_firmware_messages(tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to enable messages: %d\n", err); |
| goto remove_usb3; |
| } |
| |
| err = tegra_xusb_init_usb_phy(tegra); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to init USB PHY: %d\n", err); |
| goto remove_usb3; |
| } |
| |
| /* Enable wake for both USB 2.0 and USB 3.0 roothubs */ |
| device_init_wakeup(&tegra->hcd->self.root_hub->dev, true); |
| device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true); |
| |
| pm_runtime_use_autosuspend(tegra->dev); |
| pm_runtime_set_autosuspend_delay(tegra->dev, 2000); |
| pm_runtime_mark_last_busy(tegra->dev); |
| pm_runtime_set_active(tegra->dev); |
| |
| if (tegra->padctl_irq) { |
| device_init_wakeup(tegra->dev, true); |
| pm_runtime_enable(tegra->dev); |
| } |
| |
| return 0; |
| |
| remove_usb3: |
| usb_remove_hcd(xhci->shared_hcd); |
| put_usb3: |
| usb_put_hcd(xhci->shared_hcd); |
| remove_usb2: |
| usb_remove_hcd(tegra->hcd); |
| powergate: |
| tegra_xusb_powergate_partitions(tegra); |
| free_firmware: |
| dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt, |
| tegra->fw.phys); |
| disable_phy: |
| tegra_xusb_phy_disable(tegra); |
| disable_regulator: |
| regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); |
| disable_clk: |
| tegra_xusb_clk_disable(tegra); |
| put_hcd: |
| usb_put_hcd(tegra->hcd); |
| put_powerdomains: |
| tegra_xusb_powerdomain_remove(&pdev->dev, tegra); |
| put_padctl: |
| of_node_put(np); |
| tegra_xusb_padctl_put(tegra->padctl); |
| return err; |
| } |
| |
| static int tegra_xusb_remove(struct platform_device *pdev) |
| { |
| struct tegra_xusb *tegra = platform_get_drvdata(pdev); |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| |
| tegra_xusb_deinit_usb_phy(tegra); |
| |
| pm_runtime_get_sync(&pdev->dev); |
| usb_remove_hcd(xhci->shared_hcd); |
| usb_put_hcd(xhci->shared_hcd); |
| xhci->shared_hcd = NULL; |
| usb_remove_hcd(tegra->hcd); |
| usb_put_hcd(tegra->hcd); |
| |
| dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt, |
| tegra->fw.phys); |
| |
| if (tegra->padctl_irq) |
| pm_runtime_disable(&pdev->dev); |
| |
| pm_runtime_put(&pdev->dev); |
| |
| tegra_xusb_powergate_partitions(tegra); |
| |
| tegra_xusb_powerdomain_remove(&pdev->dev, tegra); |
| |
| tegra_xusb_phy_disable(tegra); |
| tegra_xusb_clk_disable(tegra); |
| regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); |
| tegra_xusb_padctl_put(tegra->padctl); |
| |
| return 0; |
| } |
| |
| static bool xhci_hub_ports_suspended(struct xhci_hub *hub) |
| { |
| struct device *dev = hub->hcd->self.controller; |
| bool status = true; |
| unsigned int i; |
| u32 value; |
| |
| for (i = 0; i < hub->num_ports; i++) { |
| value = readl(hub->ports[i]->addr); |
| if ((value & PORT_PE) == 0) |
| continue; |
| |
| if ((value & PORT_PLS_MASK) != XDEV_U3) { |
| dev_info(dev, "%u-%u isn't suspended: %#010x\n", |
| hub->hcd->self.busnum, i + 1, value); |
| status = false; |
| } |
| } |
| |
| return status; |
| } |
| |
| static int tegra_xusb_check_ports(struct tegra_xusb *tegra) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| struct xhci_bus_state *bus_state = &xhci->usb2_rhub.bus_state; |
| unsigned long flags; |
| int err = 0; |
| |
| if (bus_state->bus_suspended) { |
| /* xusb_hub_suspend() has just directed one or more USB2 port(s) |
| * to U3 state, it takes 3ms to enter U3. |
| */ |
| usleep_range(3000, 4000); |
| } |
| |
| spin_lock_irqsave(&xhci->lock, flags); |
| |
| if (!xhci_hub_ports_suspended(&xhci->usb2_rhub) || |
| !xhci_hub_ports_suspended(&xhci->usb3_rhub)) |
| err = -EBUSY; |
| |
| spin_unlock_irqrestore(&xhci->lock, flags); |
| |
| return err; |
| } |
| |
| static void tegra_xusb_save_context(struct tegra_xusb *tegra) |
| { |
| const struct tegra_xusb_context_soc *soc = tegra->soc->context; |
| struct tegra_xusb_context *ctx = &tegra->context; |
| unsigned int i; |
| |
| if (soc->ipfs.num_offsets > 0) { |
| for (i = 0; i < soc->ipfs.num_offsets; i++) |
| ctx->ipfs[i] = ipfs_readl(tegra, soc->ipfs.offsets[i]); |
| } |
| |
| if (soc->fpci.num_offsets > 0) { |
| for (i = 0; i < soc->fpci.num_offsets; i++) |
| ctx->fpci[i] = fpci_readl(tegra, soc->fpci.offsets[i]); |
| } |
| } |
| |
| static void tegra_xusb_restore_context(struct tegra_xusb *tegra) |
| { |
| const struct tegra_xusb_context_soc *soc = tegra->soc->context; |
| struct tegra_xusb_context *ctx = &tegra->context; |
| unsigned int i; |
| |
| if (soc->fpci.num_offsets > 0) { |
| for (i = 0; i < soc->fpci.num_offsets; i++) |
| fpci_writel(tegra, ctx->fpci[i], soc->fpci.offsets[i]); |
| } |
| |
| if (soc->ipfs.num_offsets > 0) { |
| for (i = 0; i < soc->ipfs.num_offsets; i++) |
| ipfs_writel(tegra, ctx->ipfs[i], soc->ipfs.offsets[i]); |
| } |
| } |
| |
| static enum usb_device_speed tegra_xhci_portsc_to_speed(struct tegra_xusb *tegra, u32 portsc) |
| { |
| if (DEV_LOWSPEED(portsc)) |
| return USB_SPEED_LOW; |
| |
| if (DEV_HIGHSPEED(portsc)) |
| return USB_SPEED_HIGH; |
| |
| if (DEV_FULLSPEED(portsc)) |
| return USB_SPEED_FULL; |
| |
| if (DEV_SUPERSPEED_ANY(portsc)) |
| return USB_SPEED_SUPER; |
| |
| return USB_SPEED_UNKNOWN; |
| } |
| |
| static void tegra_xhci_enable_phy_sleepwalk_wake(struct tegra_xusb *tegra) |
| { |
| struct tegra_xusb_padctl *padctl = tegra->padctl; |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| enum usb_device_speed speed; |
| struct phy *phy; |
| unsigned int index, offset; |
| unsigned int i, j, k; |
| struct xhci_hub *rhub; |
| u32 portsc; |
| |
| for (i = 0, k = 0; i < tegra->soc->num_types; i++) { |
| if (strcmp(tegra->soc->phy_types[i].name, "usb3") == 0) |
| rhub = &xhci->usb3_rhub; |
| else |
| rhub = &xhci->usb2_rhub; |
| |
| if (strcmp(tegra->soc->phy_types[i].name, "hsic") == 0) |
| offset = tegra->soc->ports.usb2.count; |
| else |
| offset = 0; |
| |
| for (j = 0; j < tegra->soc->phy_types[i].num; j++) { |
| phy = tegra->phys[k++]; |
| |
| if (!phy) |
| continue; |
| |
| index = j + offset; |
| |
| if (index >= rhub->num_ports) |
| continue; |
| |
| if (!is_host_mode_phy(tegra, i, j)) |
| continue; |
| |
| portsc = readl(rhub->ports[index]->addr); |
| speed = tegra_xhci_portsc_to_speed(tegra, portsc); |
| tegra_xusb_padctl_enable_phy_sleepwalk(padctl, phy, speed); |
| tegra_xusb_padctl_enable_phy_wake(padctl, phy); |
| } |
| } |
| } |
| |
| static void tegra_xhci_disable_phy_wake(struct tegra_xusb *tegra) |
| { |
| struct tegra_xusb_padctl *padctl = tegra->padctl; |
| unsigned int i; |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| if (!tegra->phys[i]) |
| continue; |
| |
| tegra_xusb_padctl_disable_phy_wake(padctl, tegra->phys[i]); |
| } |
| } |
| |
| static void tegra_xhci_disable_phy_sleepwalk(struct tegra_xusb *tegra) |
| { |
| struct tegra_xusb_padctl *padctl = tegra->padctl; |
| unsigned int i; |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| if (!tegra->phys[i]) |
| continue; |
| |
| tegra_xusb_padctl_disable_phy_sleepwalk(padctl, tegra->phys[i]); |
| } |
| } |
| |
| static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| struct device *dev = tegra->dev; |
| bool wakeup = runtime ? true : device_may_wakeup(dev); |
| unsigned int i; |
| int err; |
| u32 usbcmd; |
| |
| dev_dbg(dev, "entering ELPG\n"); |
| |
| usbcmd = readl(&xhci->op_regs->command); |
| usbcmd &= ~CMD_EIE; |
| writel(usbcmd, &xhci->op_regs->command); |
| |
| err = tegra_xusb_check_ports(tegra); |
| if (err < 0) { |
| dev_err(tegra->dev, "not all ports suspended: %d\n", err); |
| goto out; |
| } |
| |
| err = xhci_suspend(xhci, wakeup); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to suspend XHCI: %d\n", err); |
| goto out; |
| } |
| |
| tegra_xusb_save_context(tegra); |
| |
| if (wakeup) |
| tegra_xhci_enable_phy_sleepwalk_wake(tegra); |
| |
| tegra_xusb_powergate_partitions(tegra); |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| if (!tegra->phys[i]) |
| continue; |
| |
| phy_power_off(tegra->phys[i]); |
| if (!wakeup) |
| phy_exit(tegra->phys[i]); |
| } |
| |
| tegra_xusb_clk_disable(tegra); |
| |
| out: |
| if (!err) |
| dev_dbg(tegra->dev, "entering ELPG done\n"); |
| else { |
| usbcmd = readl(&xhci->op_regs->command); |
| usbcmd |= CMD_EIE; |
| writel(usbcmd, &xhci->op_regs->command); |
| |
| dev_dbg(tegra->dev, "entering ELPG failed\n"); |
| pm_runtime_mark_last_busy(tegra->dev); |
| } |
| |
| return err; |
| } |
| |
| static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool runtime) |
| { |
| struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); |
| struct device *dev = tegra->dev; |
| bool wakeup = runtime ? true : device_may_wakeup(dev); |
| unsigned int i; |
| u32 usbcmd; |
| int err; |
| |
| dev_dbg(dev, "exiting ELPG\n"); |
| pm_runtime_mark_last_busy(tegra->dev); |
| |
| err = tegra_xusb_clk_enable(tegra); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to enable clocks: %d\n", err); |
| goto out; |
| } |
| |
| err = tegra_xusb_unpowergate_partitions(tegra); |
| if (err) |
| goto disable_clks; |
| |
| if (wakeup) |
| tegra_xhci_disable_phy_wake(tegra); |
| |
| for (i = 0; i < tegra->num_phys; i++) { |
| if (!tegra->phys[i]) |
| continue; |
| |
| if (!wakeup) |
| phy_init(tegra->phys[i]); |
| |
| phy_power_on(tegra->phys[i]); |
| } |
| |
| tegra_xusb_config(tegra); |
| tegra_xusb_restore_context(tegra); |
| |
| err = tegra_xusb_load_firmware(tegra); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to load firmware: %d\n", err); |
| goto disable_phy; |
| } |
| |
| err = __tegra_xusb_enable_firmware_messages(tegra); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to enable messages: %d\n", err); |
| goto disable_phy; |
| } |
| |
| if (wakeup) |
| tegra_xhci_disable_phy_sleepwalk(tegra); |
| |
| err = xhci_resume(xhci, 0); |
| if (err < 0) { |
| dev_err(tegra->dev, "failed to resume XHCI: %d\n", err); |
| goto disable_phy; |
| } |
| |
| usbcmd = readl(&xhci->op_regs->command); |
| usbcmd |= CMD_EIE; |
| writel(usbcmd, &xhci->op_regs->command); |
| |
| goto out; |
| |
| disable_phy: |
| for (i = 0; i < tegra->num_phys; i++) { |
| if (!tegra->phys[i]) |
| continue; |
| |
| phy_power_off(tegra->phys[i]); |
| if (!wakeup) |
| phy_exit(tegra->phys[i]); |
| } |
| tegra_xusb_powergate_partitions(tegra); |
| disable_clks: |
| tegra_xusb_clk_disable(tegra); |
| out: |
| if (!err) |
| dev_dbg(dev, "exiting ELPG done\n"); |
| else |
| dev_dbg(dev, "exiting ELPG failed\n"); |
| |
| return err; |
| } |
| |
| static __maybe_unused int tegra_xusb_suspend(struct device *dev) |
| { |
| struct tegra_xusb *tegra = dev_get_drvdata(dev); |
| int err; |
| |
| synchronize_irq(tegra->mbox_irq); |
| |
| mutex_lock(&tegra->lock); |
| |
| if (pm_runtime_suspended(dev)) { |
| err = tegra_xusb_exit_elpg(tegra, true); |
| if (err < 0) |
| goto out; |
| } |
| |
| err = tegra_xusb_enter_elpg(tegra, false); |
| if (err < 0) { |
| if (pm_runtime_suspended(dev)) { |
| pm_runtime_disable(dev); |
| pm_runtime_set_active(dev); |
| pm_runtime_enable(dev); |
| } |
| |
| goto out; |
| } |
| |
| out: |
| if (!err) { |
| tegra->suspended = true; |
| pm_runtime_disable(dev); |
| |
| if (device_may_wakeup(dev)) { |
| if (enable_irq_wake(tegra->padctl_irq)) |
| dev_err(dev, "failed to enable padctl wakes\n"); |
| } |
| } |
| |
| mutex_unlock(&tegra->lock); |
| |
| return err; |
| } |
| |
| static __maybe_unused int tegra_xusb_resume(struct device *dev) |
| { |
| struct tegra_xusb *tegra = dev_get_drvdata(dev); |
| int err; |
| |
| mutex_lock(&tegra->lock); |
| |
| if (!tegra->suspended) { |
| mutex_unlock(&tegra->lock); |
| return 0; |
| } |
| |
| err = tegra_xusb_exit_elpg(tegra, false); |
| if (err < 0) { |
| mutex_unlock(&tegra->lock); |
| return err; |
| } |
| |
| if (device_may_wakeup(dev)) { |
| if (disable_irq_wake(tegra->padctl_irq)) |
| dev_err(dev, "failed to disable padctl wakes\n"); |
| } |
| tegra->suspended = false; |
| mutex_unlock(&tegra->lock); |
| |
| pm_runtime_set_active(dev); |
| pm_runtime_enable(dev); |
| |
| return 0; |
| } |
| |
| static __maybe_unused int tegra_xusb_runtime_suspend(struct device *dev) |
| { |
| struct tegra_xusb *tegra = dev_get_drvdata(dev); |
| int ret; |
| |
| synchronize_irq(tegra->mbox_irq); |
| mutex_lock(&tegra->lock); |
| ret = tegra_xusb_enter_elpg(tegra, true); |
| mutex_unlock(&tegra->lock); |
| |
| return ret; |
| } |
| |
| static __maybe_unused int tegra_xusb_runtime_resume(struct device *dev) |
| { |
| struct tegra_xusb *tegra = dev_get_drvdata(dev); |
| int err; |
| |
| mutex_lock(&tegra->lock); |
| err = tegra_xusb_exit_elpg(tegra, true); |
| mutex_unlock(&tegra->lock); |
| |
| return err; |
| } |
| |
| static const struct dev_pm_ops tegra_xusb_pm_ops = { |
| SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend, |
| tegra_xusb_runtime_resume, NULL) |
| SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume) |
| }; |
| |
| static const char * const tegra124_supply_names[] = { |
| "avddio-pex", |
| "dvddio-pex", |
| "avdd-usb", |
| "hvdd-usb-ss", |
| }; |
| |
| static const struct tegra_xusb_phy_type tegra124_phy_types[] = { |
| { .name = "usb3", .num = 2, }, |
| { .name = "usb2", .num = 3, }, |
| { .name = "hsic", .num = 2, }, |
| }; |
| |
| static const unsigned int tegra124_xusb_context_ipfs[] = { |
| IPFS_XUSB_HOST_MSI_BAR_SZ_0, |
| IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0, |
| IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0, |
| IPFS_XUSB_HOST_MSI_VEC0_0, |
| IPFS_XUSB_HOST_MSI_EN_VEC0_0, |
| IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0, |
| IPFS_XUSB_HOST_INTR_MASK_0, |
| IPFS_XUSB_HOST_INTR_ENABLE_0, |
| IPFS_XUSB_HOST_UFPCI_CONFIG_0, |
| IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0, |
| IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0, |
| }; |
| |
| static const unsigned int tegra124_xusb_context_fpci[] = { |
| XUSB_CFG_ARU_CONTEXT_HS_PLS, |
| XUSB_CFG_ARU_CONTEXT_FS_PLS, |
| XUSB_CFG_ARU_CONTEXT_HSFS_SPEED, |
| XUSB_CFG_ARU_CONTEXT_HSFS_PP, |
| XUSB_CFG_ARU_CONTEXT, |
| XUSB_CFG_AXI_CFG, |
| XUSB_CFG_24, |
| XUSB_CFG_16, |
| }; |
| |
| static const struct tegra_xusb_context_soc tegra124_xusb_context = { |
| .ipfs = { |
| .num_offsets = ARRAY_SIZE(tegra124_xusb_context_ipfs), |
| .offsets = tegra124_xusb_context_ipfs, |
| }, |
| .fpci = { |
| .num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci), |
| .offsets = tegra124_xusb_context_fpci, |
| }, |
| }; |
| |
| static const struct tegra_xusb_soc tegra124_soc = { |
| .firmware = "nvidia/tegra124/xusb.bin", |
| .supply_names = tegra124_supply_names, |
| .num_supplies = ARRAY_SIZE(tegra124_supply_names), |
| .phy_types = tegra124_phy_types, |
| .num_types = ARRAY_SIZE(tegra124_phy_types), |
| .context = &tegra124_xusb_context, |
| .ports = { |
| .usb2 = { .offset = 4, .count = 4, }, |
| .hsic = { .offset = 6, .count = 2, }, |
| .usb3 = { .offset = 0, .count = 2, }, |
| }, |
| .scale_ss_clock = true, |
| .has_ipfs = true, |
| .otg_reset_sspi = false, |
| .mbox = { |
| .cmd = 0xe4, |
| .data_in = 0xe8, |
| .data_out = 0xec, |
| .owner = 0xf0, |
| }, |
| }; |
| MODULE_FIRMWARE("nvidia/tegra124/xusb.bin"); |
| |
| static const char * const tegra210_supply_names[] = { |
| "dvddio-pex", |
| "hvddio-pex", |
| "avdd-usb", |
| }; |
| |
| static const struct tegra_xusb_phy_type tegra210_phy_types[] = { |
| { .name = "usb3", .num = 4, }, |
| { .name = "usb2", .num = 4, }, |
| { .name = "hsic", .num = 1, }, |
| }; |
| |
| static const struct tegra_xusb_soc tegra210_soc = { |
| .firmware = "nvidia/tegra210/xusb.bin", |
| .supply_names = tegra210_supply_names, |
| .num_supplies = ARRAY_SIZE(tegra210_supply_names), |
| .phy_types = tegra210_phy_types, |
| .num_types = ARRAY_SIZE(tegra210_phy_types), |
| .context = &tegra124_xusb_context, |
| .ports = { |
| .usb2 = { .offset = 4, .count = 4, }, |
| .hsic = { .offset = 8, .count = 1, }, |
| .usb3 = { .offset = 0, .count = 4, }, |
| }, |
| .scale_ss_clock = false, |
| .has_ipfs = true, |
| .otg_reset_sspi = true, |
| .mbox = { |
| .cmd = 0xe4, |
| .data_in = 0xe8, |
| .data_out = 0xec, |
| .owner = 0xf0, |
| }, |
| }; |
| MODULE_FIRMWARE("nvidia/tegra210/xusb.bin"); |
| |
| static const char * const tegra186_supply_names[] = { |
| }; |
| MODULE_FIRMWARE("nvidia/tegra186/xusb.bin"); |
| |
| static const struct tegra_xusb_phy_type tegra186_phy_types[] = { |
| { .name = "usb3", .num = 3, }, |
| { .name = "usb2", .num = 3, }, |
| { .name = "hsic", .num = 1, }, |
| }; |
| |
| static const struct tegra_xusb_context_soc tegra186_xusb_context = { |
| .fpci = { |
| .num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci), |
| .offsets = tegra124_xusb_context_fpci, |
| }, |
| }; |
| |
| static const struct tegra_xusb_soc tegra186_soc = { |
| .firmware = "nvidia/tegra186/xusb.bin", |
| .supply_names = tegra186_supply_names, |
| .num_supplies = ARRAY_SIZE(tegra186_supply_names), |
| .phy_types = tegra186_phy_types, |
| .num_types = ARRAY_SIZE(tegra186_phy_types), |
| .context = &tegra186_xusb_context, |
| .ports = { |
| .usb3 = { .offset = 0, .count = 3, }, |
| .usb2 = { .offset = 3, .count = 3, }, |
| .hsic = { .offset = 6, .count = 1, }, |
| }, |
| .scale_ss_clock = false, |
| .has_ipfs = false, |
| .otg_reset_sspi = false, |
| .mbox = { |
| .cmd = 0xe4, |
| .data_in = 0xe8, |
| .data_out = 0xec, |
| .owner = 0xf0, |
| }, |
| .lpm_support = true, |
| }; |
| |
| static const char * const tegra194_supply_names[] = { |
| }; |
| |
| static const struct tegra_xusb_phy_type tegra194_phy_types[] = { |
| { .name = "usb3", .num = 4, }, |
| { .name = "usb2", .num = 4, }, |
| }; |
| |
| static const struct tegra_xusb_soc tegra194_soc = { |
| .firmware = "nvidia/tegra194/xusb.bin", |
| .supply_names = tegra194_supply_names, |
| .num_supplies = ARRAY_SIZE(tegra194_supply_names), |
| .phy_types = tegra194_phy_types, |
| .num_types = ARRAY_SIZE(tegra194_phy_types), |
| .context = &tegra186_xusb_context, |
| .ports = { |
| .usb3 = { .offset = 0, .count = 4, }, |
| .usb2 = { .offset = 4, .count = 4, }, |
| }, |
| .scale_ss_clock = false, |
| .has_ipfs = false, |
| .otg_reset_sspi = false, |
| .mbox = { |
| .cmd = 0x68, |
| .data_in = 0x6c, |
| .data_out = 0x70, |
| .owner = 0x74, |
| }, |
| .lpm_support = true, |
| }; |
| MODULE_FIRMWARE("nvidia/tegra194/xusb.bin"); |
| |
| static const struct of_device_id tegra_xusb_of_match[] = { |
| { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc }, |
| { .compatible = "nvidia,tegra210-xusb", .data = &tegra210_soc }, |
| { .compatible = "nvidia,tegra186-xusb", .data = &tegra186_soc }, |
| { .compatible = "nvidia,tegra194-xusb", .data = &tegra194_soc }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, tegra_xusb_of_match); |
| |
| static struct platform_driver tegra_xusb_driver = { |
| .probe = tegra_xusb_probe, |
| .remove = tegra_xusb_remove, |
| .driver = { |
| .name = "tegra-xusb", |
| .pm = &tegra_xusb_pm_ops, |
| .of_match_table = tegra_xusb_of_match, |
| }, |
| }; |
| |
| static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci) |
| { |
| struct tegra_xusb *tegra = dev_get_drvdata(dev); |
| |
| xhci->quirks |= XHCI_PLAT; |
| if (tegra && tegra->soc->lpm_support) |
| xhci->quirks |= XHCI_LPM_SUPPORT; |
| } |
| |
| static int tegra_xhci_setup(struct usb_hcd *hcd) |
| { |
| return xhci_gen_setup(hcd, tegra_xhci_quirks); |
| } |
| |
| static const struct xhci_driver_overrides tegra_xhci_overrides __initconst = { |
| .reset = tegra_xhci_setup, |
| }; |
| |
| static int __init tegra_xusb_init(void) |
| { |
| xhci_init_driver(&tegra_xhci_hc_driver, &tegra_xhci_overrides); |
| |
| return platform_driver_register(&tegra_xusb_driver); |
| } |
| module_init(tegra_xusb_init); |
| |
| static void __exit tegra_xusb_exit(void) |
| { |
| platform_driver_unregister(&tegra_xusb_driver); |
| } |
| module_exit(tegra_xusb_exit); |
| |
| MODULE_AUTHOR("Andrew Bresticker <abrestic@chromium.org>"); |
| MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver"); |
| MODULE_LICENSE("GPL v2"); |