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Date: Tue, 5 Apr 2016 15:17:51 +0200
From: Thierry Reding <thierry.reding@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mathias Nyman <mathias.nyman@...el.com>
Cc: Stephen Warren <swarren@...dotorg.org>,
Alexandre Courbot <gnurou@...il.com>,
Andrew Bresticker <abrestic@...omium.org>,
linux-tegra@...r.kernel.org, devicetree@...r.kernel.org,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 8/9] usb: xhci: Add NVIDIA Tegra XUSB controller
driver
Hi Mathias, Greg,
Due to the various dependencies within the series, I'd prefer this to go
via the Tegra tree. Would you be okay with providing your Acked-by?
Thanks,
Thierry
On Fri, Mar 04, 2016 at 05:19:38PM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
>
> Add support for the on-chip XUSB controller present on Tegra SoCs. This
> controller, when loaded with external firmware, exposes an interface
> compliant with xHCI. This driver loads the firmware, starts the
> controller, and is able to service host-specific messages sent by the
> controller's firmware.
>
> The controller also supports USB device mode as well as powergating
> of the SuperSpeed and host-controller logic when not in use, but
> support for these is not yet implemented.
>
> Based on work by:
> Ajay Gupta <ajayg@...dia.com>
> Bharath Yadav <byadav@...dia.com>
> Andrew Bresticker <abrestic@...omium.org>
>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Mathias Nyman <mathias.nyman@...el.com>
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
> drivers/usb/host/Kconfig | 9 +
> drivers/usb/host/Makefile | 1 +
> drivers/usb/host/xhci-tegra.c | 1332 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1342 insertions(+)
> create mode 100644 drivers/usb/host/xhci-tegra.c
>
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 8c20ebbc049c..191fdeb8b841 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -69,6 +69,15 @@ config USB_XHCI_RCAR
> Say 'Y' to enable the support for the xHCI host controller
> found in Renesas R-Car ARM SoCs.
>
> +config USB_XHCI_TEGRA
> + tristate "xHCI support for NVIDIA Tegra SoCs"
> + depends on PHY_TEGRA_XUSB
> + depends on RESET_CONTROLLER
> + select FW_LOADER
> + ---help---
> + Say 'Y' to enable the support for the xHCI host controller
> + found in NVIDIA Tegra124 and later SoCs.
> +
> endif # USB_XHCI_HCD
>
> config USB_EHCI_HCD
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index a9ddd3c9ec94..6ef785b0ea8f 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
> obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
> obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
> obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
> +obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o
> obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
> obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
> obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
> diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
> new file mode 100644
> index 000000000000..ab6f9856c5c4
> --- /dev/null
> +++ b/drivers/usb/host/xhci-tegra.c
> @@ -0,0 +1,1332 @@
> +/*
> + * 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.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/firmware.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/phy/phy.h>
> +#include <linux/phy/tegra/xusb.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
> +#include <linux/slab.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_ARU_C11_CSBRANGE 0x41c
> +#define XUSB_CFG_CSB_BASE_ADDR 0x800
> +
> +/* FPCI mailbox registers */
> +#define XUSB_CFG_ARU_MBOX_CMD 0x0e4
> +#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)
> +#define XUSB_CFG_ARU_MBOX_DATA_IN 0x0e8
> +#define CMD_DATA_SHIFT 0
> +#define CMD_DATA_MASK 0xffffff
> +#define CMD_TYPE_SHIFT 24
> +#define CMD_TYPE_MASK 0xff
> +#define XUSB_CFG_ARU_MBOX_DATA_OUT 0x0ec
> +#define XUSB_CFG_ARU_MBOX_OWNER 0x0f0
> +#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_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 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_MP_APMAP 0x10181c
> +#define APMAP_BOOTPATH BIT(31)
> +
> +#define IMEM_BLOCK_SIZE 256
> +
> +struct tegra_xusb_fw_header {
> + 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]; /* Pad to 256 bytes */
> +};
> +
> +struct tegra_xusb_phy_type {
> + const char *name;
> + unsigned int num;
> +};
> +
> +struct tegra_xusb_soc {
> + const char *firmware_file;
> + const char * const *supply_names;
> + unsigned int num_supplies;
> + const struct tegra_xusb_phy_type *phy_types;
> + unsigned int num_types;
> +
> + struct {
> + struct {
> + unsigned int offset;
> + unsigned int count;
> + } usb2, ulpi, hsic, usb3;
> + } ports;
> +};
> +
> +struct tegra_xusb {
> + struct device *dev;
> + struct usb_hcd *hcd;
> +
> + struct mutex lock;
> +
> + int xhci_irq;
> + int mbox_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 phy **phys;
> + unsigned int num_phys;
> +
> + /* Firmware loading related */
> + void *fw_data;
> + size_t fw_size;
> + dma_addr_t fw_dma_addr;
> + bool fw_loaded;
> +};
> +
> +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
> +};
> +
> +static const char * const mbox_cmd_name[] = {
> + [ 1] = "MSG_ENABLE",
> + [ 2] = "INC_FALCON_CLOCK",
> + [ 3] = "DEC_FALCON_CLOCK",
> + [ 4] = "INC_SSPI_CLOCK",
> + [ 5] = "DEC_SSPI_CLOCK",
> + [ 6] = "SET_BW",
> + [ 7] = "SET_SS_PWR_GATING",
> + [ 8] = "SET_SS_PWR_UNGATING",
> + [ 9] = "SAVE_DFE_CTLE_CTX",
> + [ 10] = "AIRPLANE_MODE_ENABLED",
> + [ 11] = "AIRPLANE_MODE_DISABLED",
> + [ 12] = "START_HSIC_IDLE",
> + [ 13] = "STOP_HSIC_IDLE",
> + [ 14] = "DBC_WAKE_STACK",
> + [ 15] = "HSIC_PRETEND_CONNECT",
> + [ 16] = "RESET_SSPI",
> + [ 17] = "DISABLE_SS_LFPS_DETECTION",
> + [ 18] = "ENABLE_SS_LFPS_DETECTION",
> + [128] = "ACK",
> + [129] = "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, XUSB_CFG_ARU_MBOX_OWNER);
> + if (value != MBOX_OWNER_NONE) {
> + dev_err(tegra->dev, "mailbox is busy\n");
> + return -EBUSY;
> + }
> +
> + fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER);
> +
> + value = fpci_readl(tegra, XUSB_CFG_ARU_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, XUSB_CFG_ARU_MBOX_DATA_IN);
> +
> + value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
> + value |= MBOX_INT_EN | MBOX_DEST_FALC;
> + fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
> +
> + if (wait_for_idle) {
> + unsigned long timeout = jiffies + msecs_to_jiffies(250);
> +
> + while (time_before(jiffies, timeout)) {
> + value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
> + if (value == MBOX_OWNER_NONE)
> + break;
> +
> + usleep_range(10, 20);
> + }
> +
> + if (time_after(jiffies, timeout))
> + value = fpci_readl(tegra, XUSB_CFG_ARU_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;
> +
> + 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:
> + 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;
> + 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;
> + }
> +
> + 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);
> +
> + value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_DATA_OUT);
> + tegra_xusb_mbox_unpack(&msg, value);
> +
> + value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
> + value &= ~MBOX_DEST_SMI;
> + fpci_writel(tegra, value, XUSB_CFG_ARU_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, XUSB_CFG_ARU_MBOX_OWNER);
> +
> + tegra_xusb_mbox_handle(tegra, &msg);
> +
> + mutex_unlock(&tegra->lock);
> + return IRQ_HANDLED;
> +}
> +
> +static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra)
> +{
> + u32 value;
> +
> + 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 |= tegra->hcd->rsrc_start & (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);
> +
> + /* 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_load_firmware(struct tegra_xusb *tegra)
> +{
> + unsigned int code_tag_blocks, code_size_blocks, code_blocks;
> + struct tegra_xusb_fw_header *header;
> + struct device *dev = tegra->dev;
> + unsigned long timeout;
> + struct tm fw_tm;
> + time_t fw_time;
> + u64 fw_base;
> + u32 value;
> +
> + 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;
> + }
> +
> + header = (struct tegra_xusb_fw_header *)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(*header);
> + 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.
> + */
> + 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);
> +
> + msleep(50);
> +
> + csb_writel(tegra, le32_to_cpu(header->boot_codetag),
> + XUSB_FALC_BOOTVEC);
> +
> + /* Boot Falcon CPU and wait for it to enter the STOPPED (idle) state. */
> + timeout = jiffies + msecs_to_jiffies(5);
> +
> + csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL);
> +
> + while (time_before(jiffies, timeout)) {
> + if (csb_readl(tegra, XUSB_FALC_CPUCTL) == CPUCTL_STATE_STOPPED)
> + break;
> +
> + usleep_range(100, 200);
> + }
> +
> + if (csb_readl(tegra, XUSB_FALC_CPUCTL) != CPUCTL_STATE_STOPPED) {
> + dev_err(dev, "Falcon failed to start, state: %#x\n",
> + csb_readl(tegra, XUSB_FALC_CPUCTL));
> + return -EIO;
> + }
> +
> + fw_time = le32_to_cpu(header->fwimg_created_time);
> + time_to_tm(fw_time, 0, &fw_tm);
> +
> + dev_info(dev, "Firmware timestamp: %ld-%02d-%02d %02d:%02d:%02d UTC\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);
> +
> + return 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;
> +
> + 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]);
> + }
> +}
> +
> +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 char * const tegra124_supply_names[] = {
> + "avddio-pex",
> + "dvddio-pex",
> + "avdd-usb",
> + "avdd-pll-utmip",
> + "avdd-pll-erefe",
> + "avdd-usb-ss-pll",
> + "hvdd-usb-ss",
> + "hvdd-usb-ss-pll-e",
> +};
> +
> +static const struct tegra_xusb_phy_type tegra124_phy_types[] = {
> + { .name = "usb3", .num = 2, },
> + { .name = "usb2", .num = 3, },
> + { .name = "hsic", .num = 2, },
> +};
> +
> +static const struct tegra_xusb_soc tegra124_soc = {
> + .firmware_file = "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),
> + .ports = {
> + .usb2 = { .offset = 4, .count = 4, },
> + .hsic = { .offset = 6, .count = 2, },
> + .usb3 = { .offset = 0, .count = 2, },
> + },
> +};
> +MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
> +
> +static const struct of_device_id tegra_xusb_of_match[] = {
> + { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc },
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, tegra_xusb_of_match);
> +
> +static void tegra_xusb_probe_finish(const struct firmware *fw, void *context)
> +{
> + struct tegra_xusb_fw_header *header;
> + struct tegra_xusb *tegra = context;
> + struct device *dev = tegra->dev;
> + struct tegra_xusb_mbox_msg msg;
> + struct xhci_hcd *xhci = NULL;
> + int err;
> +
> + if (!fw) {
> + dev_err(tegra->dev, "no firmware loaded\n");
> + goto put_usb2_hcd;
> + }
> +
> + /* 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_data = dma_alloc_coherent(dev, tegra->fw_size,
> + &tegra->fw_dma_addr,
> + GFP_KERNEL);
> + if (!tegra->fw_data) {
> + dev_err(tegra->dev, "failed to allocate memory for firmware\n");
> + goto put_usb2_hcd;
> + }
> +
> + memcpy(tegra->fw_data, fw->data, tegra->fw_size);
> +
> + err = tegra_xusb_load_firmware(tegra);
> + if (err < 0) {
> + dev_err(tegra->dev, "failed to parse firmware: %d\n", err);
> + goto put_usb2_hcd;
> + }
> +
> + err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
> + if (err < 0) {
> + dev_err(tegra->dev, "failed to add USB HCD: %d\n", err);
> + 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) {
> + dev_err(tegra->dev, "failed to create shared HCD\n");
> + goto dealloc_usb2_hcd;
> + }
> +
> + err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED);
> + if (err < 0) {
> + dev_err(tegra->dev, "failed to add shared HCD: %d\n", err);
> + goto put_usb3_hcd;
> + }
> +
> + mutex_lock(&tegra->lock);
> +
> + /* 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);
> + mutex_unlock(&tegra->lock);
> + goto dealloc_usb3_hcd;
> + }
> +
> + mutex_unlock(&tegra->lock);
> +
> + err = devm_request_threaded_irq(dev, tegra->mbox_irq,
> + tegra_xusb_mbox_irq,
> + tegra_xusb_mbox_thread, 0,
> + dev_name(dev), tegra);
> + if (err < 0) {
> + dev_err(tegra->dev, "failed to request IRQ: %d\n", err);
> + goto dealloc_usb3_hcd;
> + }
> +
> + tegra->fw_loaded = true;
> + release_firmware(fw);
> +
> + return;
> +
> + /* Free up as much as we can and wait to be unbound. */
> +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);
> +put_usb2_hcd:
> + usb_put_hcd(tegra->hcd);
> + tegra->hcd = NULL;
> + release_firmware(fw);
> +}
> +
> +static int tegra_xusb_probe(struct platform_device *pdev)
> +{
> + const struct of_device_id *match;
> + struct tegra_xusb *tegra;
> + unsigned int i, j, k;
> + struct resource *res;
> + struct usb_hcd *hcd;
> + 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;
> +
> + platform_set_drvdata(pdev, tegra);
> + mutex_init(&tegra->lock);
> + tegra->dev = &pdev->dev;
> +
> + match = of_match_device(tegra_xusb_of_match, &pdev->dev);
> + tegra->soc = match->data;
> +
> + 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)) {
> + err = 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)) {
> + err = 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)) {
> + err = PTR_ERR(tegra->ipfs_base);
> + goto put_hcd;
> + }
> +
> + tegra->xhci_irq = platform_get_irq(pdev, 0);
> + if (tegra->xhci_irq < 0) {
> + err = tegra->xhci_irq;
> + goto put_hcd;
> + }
> +
> + tegra->mbox_irq = platform_get_irq(pdev, 1);
> + if (tegra->mbox_irq < 0) {
> + err = tegra->mbox_irq;
> + goto put_hcd;
> + }
> +
> + tegra->padctl = tegra_xusb_padctl_get(&pdev->dev);
> + if (IS_ERR(tegra->padctl)) {
> + err = PTR_ERR(tegra->padctl);
> + goto put_hcd;
> + }
> +
> + 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;
> + }
> +
> + 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;
> + }
> +
> + err = tegra_xusb_clk_enable(tegra);
> + if (err) {
> + dev_err(&pdev->dev, "failed to enable clocks: %d\n", err);
> + goto put_padctl;
> + }
> +
> + tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
> + sizeof(*tegra->supplies), GFP_KERNEL);
> + if (!tegra->supplies) {
> + err = -ENOMEM;
> + goto disable_clk;
> + }
> +
> + for (i = 0; i < tegra->soc->num_supplies; i++)
> + tegra->supplies[i].supply = tegra->soc->supply_names[i];
> +
> + 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 disable_clk;
> + }
> +
> + err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
> + if (err) {
> + dev_err(&pdev->dev, "failed to enable regulators: %d\n", err);
> + goto disable_clk;
> + }
> +
> + for (i = 0; i < tegra->soc->num_types; i++)
> + 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) {
> + dev_err(&pdev->dev, "failed to allocate PHY array\n");
> + err = -ENOMEM;
> + goto disable_regulator;
> + }
> +
> + 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 disable_regulator;
> + }
> +
> + tegra->phys[k++] = phy;
> + }
> + }
> +
> + tegra_xusb_ipfs_config(tegra);
> +
> + err = tegra_xusb_phy_enable(tegra);
> + if (err < 0) {
> + dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
> + goto disable_regulator;
> + }
> +
> + err = request_firmware_nowait(THIS_MODULE, true,
> + tegra->soc->firmware_file,
> + tegra->dev, GFP_KERNEL, tegra,
> + tegra_xusb_probe_finish);
> + if (err < 0) {
> + dev_err(&pdev->dev, "failed to request firmware: %d\n", err);
> + goto disable_phy;
> + }
> +
> + return 0;
> +
> +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_padctl:
> + tegra_xusb_padctl_put(tegra->padctl);
> +put_hcd:
> + usb_put_hcd(hcd);
> + return err;
> +}
> +
> +static int tegra_xusb_remove(struct platform_device *pdev)
> +{
> + struct tegra_xusb *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);
> + tegra_xusb_padctl_put(tegra->padctl);
> + usb_put_hcd(hcd);
> + kfree(xhci);
> + } else if (hcd) {
> + /* Unbound after probe(), but before firmware loading. */
> + tegra_xusb_padctl_put(tegra->padctl);
> + 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_phy_disable(tegra);
> + regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
> + tegra_xusb_clk_disable(tegra);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int tegra_xusb_suspend(struct device *dev)
> +{
> + struct tegra_xusb *tegra = dev_get_drvdata(dev);
> + struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
> + bool wakeup = device_may_wakeup(dev);
> +
> + /* TODO: Powergate controller across suspend/resume. */
> + return xhci_suspend(xhci, wakeup);
> +}
> +
> +static int tegra_xusb_resume(struct device *dev)
> +{
> + struct tegra_xusb *tegra = dev_get_drvdata(dev);
> + struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
> +
> + return xhci_resume(xhci, 0);
> +}
> +#endif
> +
> +static const struct dev_pm_ops tegra_xusb_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume)
> +};
> +
> +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 const struct xhci_driver_overrides tegra_xhci_overrides __initconst = {
> + .extra_priv_size = sizeof(struct xhci_hcd),
> + .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@...omium.org>");
> +MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.1
>
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