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linux-stable/drivers/usb/host/xhci-tegra.c
JC Kuo da7e0c3c29 xhci: tegra: Delay for disabling LFPS detector 
Occasionally, we are seeing some SuperSpeed devices resumes right after
being directed to U3. This commits add 500us delay to ensure LFPS
detector is disabled before sending ACK to firmware.

[   16.099363] tegra-xusb 70090000.usb: entering ELPG
[   16.104343] tegra-xusb 70090000.usb: 2-1 isn't suspended: 0x0c001203
[   16.114576] tegra-xusb 70090000.usb: not all ports suspended: -16
[   16.120789] tegra-xusb 70090000.usb: entering ELPG failed

The register write passes through a few flop stages of 32KHz clock domain.
NVIDIA ASIC designer reviewed RTL and suggests 500us delay.

Cc: stable@vger.kernel.org
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210115161907.2875631-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-15 17:27:31 +01:00

2096 lines
52 KiB
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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/iopoll.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_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;
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;
struct device_link *genpd_dl_host;
struct device_link *genpd_dl_ss;
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;
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);
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);
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]);
}
}
static int tegra_xusb_runtime_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
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;
}
return 0;
disable_clk:
tegra_xusb_clk_disable(tegra);
return err;
}
#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;
struct tm time;
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);
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 void tegra_xusb_powerdomain_remove(struct device *dev,
struct tegra_xusb *tegra)
{
if (tegra->genpd_dl_ss)
device_link_del(tegra->genpd_dl_ss);
if (tegra->genpd_dl_host)
device_link_del(tegra->genpd_dl_host);
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->genpd_dl_host = device_link_add(dev, tegra->genpd_dev_host,
DL_FLAG_PM_RUNTIME |
DL_FLAG_STATELESS);
if (!tegra->genpd_dl_host) {
dev_err(dev, "adding host device link failed!\n");
return -ENODEV;
}
tegra->genpd_dl_ss = device_link_add(dev, tegra->genpd_dev_ss,
DL_FLAG_PM_RUNTIME |
DL_FLAG_STATELESS);
if (!tegra->genpd_dl_ss) {
dev_err(dev, "adding superspeed device link failed!\n");
return -ENODEV;
}
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 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);
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);
}
}
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->otg_usb3_port = tegra_xusb_padctl_get_usb3_companion(
tegra->padctl,
tegra->otg_usb2_port);
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 tegra_xusb *tegra;
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;
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);
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);
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;
}
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) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
dev_err(&pdev->dev,
"failed to enable XUSBC domain: %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->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_phy_enable(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
goto put_hcd;
}
/*
* 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;
}
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev))
err = tegra_xusb_runtime_resume(&pdev->dev);
else
err = pm_runtime_get_sync(&pdev->dev);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable device: %d\n", 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 put_rpm;
}
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;
}
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 = 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;
}
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;
}
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);
put_hcd:
usb_put_hcd(tegra->hcd);
free_firmware:
dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
tegra->fw.phys);
disable_phy:
tegra_xusb_phy_disable(tegra);
pm_runtime_disable(&pdev->dev);
put_powerdomains:
if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
} else {
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
}
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);
tegra_xusb_deinit_usb_phy(tegra);
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);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
} else {
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
}
tegra_xusb_phy_disable(tegra);
tegra_xusb_padctl_put(tegra->padctl);
return 0;
}
#ifdef CONFIG_PM_SLEEP
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);
unsigned long flags;
int err = 0;
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 int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool wakeup)
{
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
int err;
err = tegra_xusb_check_ports(tegra);
if (err < 0) {
dev_err(tegra->dev, "not all ports suspended: %d\n", err);
return err;
}
err = xhci_suspend(xhci, wakeup);
if (err < 0) {
dev_err(tegra->dev, "failed to suspend XHCI: %d\n", err);
return err;
}
tegra_xusb_save_context(tegra);
tegra_xusb_phy_disable(tegra);
tegra_xusb_clk_disable(tegra);
return 0;
}
static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool wakeup)
{
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
int err;
err = tegra_xusb_clk_enable(tegra);
if (err < 0) {
dev_err(tegra->dev, "failed to enable clocks: %d\n", err);
return err;
}
err = tegra_xusb_phy_enable(tegra);
if (err < 0) {
dev_err(tegra->dev, "failed to enable PHYs: %d\n", err);
goto disable_clk;
}
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;
}
err = xhci_resume(xhci, true);
if (err < 0) {
dev_err(tegra->dev, "failed to resume XHCI: %d\n", err);
goto disable_phy;
}
return 0;
disable_phy:
tegra_xusb_phy_disable(tegra);
disable_clk:
tegra_xusb_clk_disable(tegra);
return err;
}
static int tegra_xusb_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int err;
synchronize_irq(tegra->mbox_irq);
mutex_lock(&tegra->lock);
err = tegra_xusb_enter_elpg(tegra, wakeup);
mutex_unlock(&tegra->lock);
return err;
}
static int tegra_xusb_resume(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int err;
mutex_lock(&tegra->lock);
err = tegra_xusb_exit_elpg(tegra, wakeup);
mutex_unlock(&tegra->lock);
return err;
}
#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",
"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");
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