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linux-next/drivers/usb/host/xhci-tegra.c
Stefan Agner 3431a150fd usb: xhci: tegra: fix runtime PM error handling 
The address-of operator will always evaluate to true. However,
power should be explicitly disabled if no power domain is used.

Remove the address-of operator.

Fixes: 58c38116c6 ("usb: xhci: tegra: Add support for managing powergates")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-25 21:16:27 +08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* NVIDIA Tegra xHCI host controller driver
*
* Copyright (C) 2014 NVIDIA Corporation
* 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/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/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/slab.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_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;
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;
bool scale_ss_clock;
};
struct tegra_xusb {
struct device *dev;
void __iomem *regs;
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 */
struct {
size_t size;
void *virt;
dma_addr_t phys;
} fw;
};
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 = 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;
}
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,
struct resource *regs)
{
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 |= regs->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_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]);
}
}
static int tegra_xusb_runtime_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
tegra_xusb_phy_disable(tegra);
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
tegra_xusb_clk_disable(tegra);
return 0;
}
static int tegra_xusb_runtime_resume(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
int err;
err = tegra_xusb_clk_enable(tegra);
if (err) {
dev_err(dev, "failed to enable clocks: %d\n", err);
return err;
}
err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
if (err) {
dev_err(dev, "failed to enable regulators: %d\n", err);
goto disable_clk;
}
err = tegra_xusb_phy_enable(tegra);
if (err < 0) {
dev_err(dev, "failed to enable PHYs: %d\n", err);
goto disable_regulator;
}
return 0;
disable_regulator:
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
disable_clk:
tegra_xusb_clk_disable(tegra);
return err;
}
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;
const struct firmware *fw;
unsigned long timeout;
time64_t timestamp;
struct tm time;
u64 address;
u32 value;
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);
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);
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;
}
timestamp = le32_to_cpu(header->fwimg_created_time);
time64_to_tm(timestamp, 0, &time);
dev_info(dev, "Firmware timestamp: %ld-%02d-%02d %02d:%02d:%02d UTC\n",
time.tm_year + 1900, time.tm_mon + 1, time.tm_mday,
time.tm_hour, time.tm_min, time.tm_sec);
return 0;
}
static int tegra_xusb_probe(struct platform_device *pdev)
{
struct tegra_xusb_mbox_msg msg;
struct resource *res, *regs;
struct tegra_xusb *tegra;
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;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tegra->regs = devm_ioremap_resource(&pdev->dev, regs);
if (IS_ERR(tegra->regs))
return PTR_ERR(tegra->regs);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
tegra->fpci_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(tegra->fpci_base))
return PTR_ERR(tegra->fpci_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
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);
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 (!pdev->dev.pm_domain) {
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;
}
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
tegra->ss_clk,
tegra->ss_rst);
if (err) {
dev_err(&pdev->dev,
"failed to enable XUSBA domain: %d\n", err);
goto put_padctl;
}
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
tegra->host_clk,
tegra->host_rst);
if (err) {
dev_err(&pdev->dev,
"failed to enable XUSBC domain: %d\n", err);
goto disable_xusba;
}
}
tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
sizeof(*tegra->supplies), GFP_KERNEL);
if (!tegra->supplies) {
err = -ENOMEM;
goto disable_xusbc;
}
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_xusbc;
}
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) {
err = -ENOMEM;
goto disable_xusbc;
}
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_xusbc;
}
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 disable_xusbc;
}
/*
* 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);
pm_runtime_enable(&pdev->dev);
if (pm_runtime_enabled(&pdev->dev))
err = pm_runtime_get_sync(&pdev->dev);
else
err = tegra_xusb_runtime_resume(&pdev->dev);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable device: %d\n", err);
goto disable_rpm;
}
tegra_xusb_ipfs_config(tegra, regs);
err = tegra_xusb_load_firmware(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
goto put_rpm;
}
tegra->hcd->regs = tegra->regs;
tegra->hcd->rsrc_start = regs->start;
tegra->hcd->rsrc_len = resource_size(regs);
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 put_rpm;
}
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;
}
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(&pdev->dev, "failed to enable messages: %d\n", err);
mutex_unlock(&tegra->lock);
goto remove_usb3;
}
mutex_unlock(&tegra->lock);
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;
}
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);
put_rpm:
if (!pm_runtime_status_suspended(&pdev->dev))
tegra_xusb_runtime_suspend(&pdev->dev);
disable_rpm:
pm_runtime_disable(&pdev->dev);
usb_put_hcd(tegra->hcd);
disable_xusbc:
if (!pdev->dev.pm_domain)
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
disable_xusba:
if (!pdev->dev.pm_domain)
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
put_padctl:
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);
usb_remove_hcd(xhci->shared_hcd);
usb_put_hcd(xhci->shared_hcd);
usb_remove_hcd(tegra->hcd);
usb_put_hcd(tegra->hcd);
dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
tegra->fw.phys);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
tegra_xusb_padctl_put(tegra->padctl);
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_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",
"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 = "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, },
},
.scale_ss_clock = true,
};
MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
static const char * const tegra210_supply_names[] = {
"dvddio-pex",
"hvddio-pex",
"avdd-usb",
"avdd-pll-utmip",
"avdd-pll-uerefe",
"dvdd-pex-pll",
"hvdd-pex-pll-e",
};
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),
.ports = {
.usb2 = { .offset = 4, .count = 4, },
.hsic = { .offset = 8, .count = 1, },
.usb3 = { .offset = 0, .count = 4, },
},
.scale_ss_clock = false,
};
MODULE_FIRMWARE("nvidia/tegra210/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 },
{ },
};
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)
{
xhci->quirks |= XHCI_PLAT;
}
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");
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