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kernel_samsung_a34x-permissive/drivers/usb/host/xhci-mtk.c
Fede2782 6db4831e98
Import A346BXXU4BWK2 kernel source 
Android 14
2024-04-28 15:51:13 +02:00

968 lines
23 KiB
C
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// SPDX-License-Identifier: GPL-2.0
/*
* MediaTek xHCI Host Controller Driver
*
* Copyright (c) 2015 MediaTek Inc.
* Author:
* Chunfeng Yun <chunfeng.yun@mediatek.com>
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
#include <linux/of_device.h>
#include <linux/usb.h>
#endif
#include "xhci.h"
#include "xhci-mtk.h"
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
#include "usb_offload.h"
#endif
/* ip_pw_ctrl0 register */
#define CTRL0_IP_SW_RST BIT(0)
/* ip_pw_ctrl1 register */
#define CTRL1_IP_HOST_PDN BIT(0)
/* ip_pw_ctrl2 register */
#define CTRL2_IP_DEV_PDN BIT(0)
/* ip_pw_sts1 register */
#define STS1_IP_SLEEP_STS BIT(30)
#define STS1_U3_MAC_RST BIT(16)
#define STS1_XHCI_RST BIT(11)
#define STS1_SYS125_RST BIT(10)
#define STS1_REF_RST BIT(8)
#define STS1_SYSPLL_STABLE BIT(0)
/* ip_xhci_cap register */
#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)
/* u3_ctrl_p register */
#define CTRL_U3_PORT_HOST_SEL BIT(2)
#define CTRL_U3_PORT_PDN BIT(1)
#define CTRL_U3_PORT_DIS BIT(0)
/* u2_ctrl_p register */
#define CTRL_U2_PORT_HOST_SEL BIT(2)
#define CTRL_U2_PORT_PDN BIT(1)
#define CTRL_U2_PORT_DIS BIT(0)
/* u2_phy_pll register */
#define CTRL_U2_FORCE_PLL_STB BIT(28)
/* usb remote wakeup registers in syscon */
/* mt8173 etc */
#define PERI_WK_CTRL1 0x4
#define WC1_IS_C(x) (((x) & 0xf) << 26) /* cycle debounce */
#define WC1_IS_EN BIT(25)
#define WC1_IS_P BIT(6) /* polarity for ip sleep */
/* mt2712 etc */
#define PERI_SSUSB_SPM_CTRL 0x0
#define SSC_IP_SLEEP_EN BIT(4)
#define SSC_SPM_INT_EN BIT(1)
/*testmode*/
#define HOST_CMD_STOP 0x0
#define HOST_CMD_TEST_J 0x1
#define HOST_CMD_TEST_K 0x2
#define HOST_CMD_TEST_SE0_NAK 0x3
#define HOST_CMD_TEST_PACKET 0x4
#define PMSC_PORT_TEST_CTRL_OFFSET 28
/*procfs node*/
#define PROC_FILES_NUM 1
static struct proc_dir_entry *proc_files[PROC_FILES_NUM] = {
NULL};
enum ssusb_uwk_vers {
SSUSB_UWK_V1 = 1,
SSUSB_UWK_V2,
};
static int xhci_testmode_show(struct seq_file *s, void *unused)
{
struct xhci_hcd_mtk *mtk = s->private;
struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
switch (xhci->test_mode) {
case HOST_CMD_STOP:
seq_puts(s, "0\n");
break;
case HOST_CMD_TEST_J:
seq_puts(s, "test J\n");
break;
case HOST_CMD_TEST_K:
seq_puts(s, "test K\n");
break;
case HOST_CMD_TEST_SE0_NAK:
seq_puts(s, "test SE0 NAK\n");
break;
case HOST_CMD_TEST_PACKET:
seq_puts(s, "test packet\n");
break;
default:
break;
}
return 0;
}
static int xhci_testmode_open(struct inode *inode, struct file *file)
{
return single_open(file, xhci_testmode_show, PDE_DATA(inode));
}
static ssize_t xhci_testmode_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *s = file->private_data;
struct xhci_hcd_mtk *mtk = s->private;
struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
int ports = HCS_MAX_PORTS(xhci->hcs_params1);
char buf[32];
unsigned long flags;
u8 testmode = HOST_CMD_STOP;
u32 temp;
u32 __iomem *addr;
int i;
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (!strncmp(buf, "test packet", 10))
testmode = HOST_CMD_TEST_PACKET;
else if (!strncmp(buf, "test K", 6))
testmode = HOST_CMD_TEST_K;
else if (!strncmp(buf, "test J", 6))
testmode = HOST_CMD_TEST_J;
else if (!strncmp(buf, "test SE0 NAK", 12))
testmode = HOST_CMD_TEST_SE0_NAK;
if (testmode >= HOST_CMD_STOP && testmode <= HOST_CMD_TEST_PACKET) {
xhci_info(xhci, "set test mode %d\n", testmode);
spin_lock_irqsave(&xhci->lock, flags);
/* set the Run/Stop in USBCMD to 0 */
addr = &xhci->op_regs->command;
temp = readl(addr);
temp &= ~CMD_RUN;
writel(temp, addr);
/* wait for HCHalted */
xhci_halt(xhci);
/* test mode */
for (i = 0; i < ports; i++) {
addr = &xhci->op_regs->port_power_base +
NUM_PORT_REGS * (i & 0xff);
temp = readl(addr);
temp &= ~(0xf << PMSC_PORT_TEST_CTRL_OFFSET);
temp |= (testmode << PMSC_PORT_TEST_CTRL_OFFSET);
writel(temp, addr);
}
xhci->test_mode = testmode;
spin_unlock_irqrestore(&xhci->lock, flags);
} else {
pr_info("%s: invalid value\n", __func__);
return -EINVAL;
}
return count;
}
static const struct file_operations testmode_fops = {
.open = xhci_testmode_open,
.write = xhci_testmode_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void xhci_mtk_dbg_init(struct xhci_hcd_mtk *mtk)
{
u8 idx = 0;
proc_mkdir("mtk_usb", NULL);
proc_files[idx] = proc_create_data("mtk_usb/testmode", 0644, NULL, &testmode_fops, mtk);
if (!proc_files[idx])
pr_info("%s: fail to create testmode node in procfs\n", __func__);
idx++;
}
static void xhci_mtk_dbg_exit(struct xhci_hcd_mtk *mtk)
{
u8 idx = 0;
for (; idx < PROC_FILES_NUM; idx++) {
if (proc_files[idx])
proc_remove(proc_files[idx]);
}
}
int mtk_xhci_wakelock_lock(struct xhci_hcd_mtk *mtk)
{
struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
pm_stay_awake(mtk->dev);
xhci_info(xhci, "wakelock_lock\n");
return 0;
}
EXPORT_SYMBOL_GPL(mtk_xhci_wakelock_lock);
int mtk_xhci_wakelock_unlock(struct xhci_hcd_mtk *mtk)
{
struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
pm_relax(mtk->dev);
xhci_info(xhci, "wakelock_unlock\n");
return 0;
}
EXPORT_SYMBOL_GPL(mtk_xhci_wakelock_unlock);
static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
{
struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
u32 value, check_val;
int u3_ports_disabed = 0;
int ret;
int i;
if (!mtk->has_ippc)
return 0;
/* power on host ip */
value = readl(&ippc->ip_pw_ctr1);
value &= ~CTRL1_IP_HOST_PDN;
writel(value, &ippc->ip_pw_ctr1);
/* power on and enable u3 ports except skipped ones */
for (i = 0; i < mtk->num_u3_ports; i++) {
if ((0x1 << i) & mtk->u3p_dis_msk) {
u3_ports_disabed++;
continue;
}
value = readl(&ippc->u3_ctrl_p[i]);
value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
value |= CTRL_U3_PORT_HOST_SEL;
writel(value, &ippc->u3_ctrl_p[i]);
}
/* power on and enable all u2 ports */
for (i = 0; i < mtk->num_u2_ports; i++) {
value = readl(&ippc->u2_ctrl_p[i]);
value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
value |= CTRL_U2_PORT_HOST_SEL;
writel(value, &ippc->u2_ctrl_p[i]);
}
/*
* wait for clocks to be stable, and clock domains reset to
* be inactive after power on and enable ports
*/
check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
STS1_SYS125_RST | STS1_XHCI_RST;
if (mtk->num_u3_ports > u3_ports_disabed)
check_val |= STS1_U3_MAC_RST;
ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
(check_val == (value & check_val)), 100, 20000);
if (ret) {
dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value);
return ret;
}
return 0;
}
static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
{
struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
u32 value;
int ret;
int i;
if (!mtk->has_ippc)
return 0;
/* power down u3 ports except skipped ones */
for (i = 0; i < mtk->num_u3_ports; i++) {
if ((0x1 << i) & mtk->u3p_dis_msk)
continue;
value = readl(&ippc->u3_ctrl_p[i]);
value |= CTRL_U3_PORT_PDN;
writel(value, &ippc->u3_ctrl_p[i]);
}
/* power down all u2 ports */
for (i = 0; i < mtk->num_u2_ports; i++) {
value = readl(&ippc->u2_ctrl_p[i]);
value |= CTRL_U2_PORT_PDN;
writel(value, &ippc->u2_ctrl_p[i]);
}
/* power down host ip */
value = readl(&ippc->ip_pw_ctr1);
value |= CTRL1_IP_HOST_PDN;
writel(value, &ippc->ip_pw_ctr1);
/* wait for host ip to sleep */
ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
(value & STS1_IP_SLEEP_STS), 100, 100000);
if (ret) {
dev_err(mtk->dev, "ip sleep failed!!!\n");
return ret;
}
return 0;
}
static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
{
struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
u32 value;
if (!mtk->has_ippc)
return 0;
/* reset whole ip */
value = readl(&ippc->ip_pw_ctr0);
value |= CTRL0_IP_SW_RST;
writel(value, &ippc->ip_pw_ctr0);
udelay(1);
value = readl(&ippc->ip_pw_ctr0);
value &= ~CTRL0_IP_SW_RST;
writel(value, &ippc->ip_pw_ctr0);
/*
* device ip is default power-on in fact
* power down device ip, otherwise ip-sleep will fail
*/
value = readl(&ippc->ip_pw_ctr2);
value |= CTRL2_IP_DEV_PDN;
writel(value, &ippc->ip_pw_ctr2);
value = readl(&ippc->ip_xhci_cap);
mtk->num_u3_ports = CAP_U3_PORT_NUM(value);
mtk->num_u2_ports = CAP_U2_PORT_NUM(value);
dev_dbg(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__,
mtk->num_u2_ports, mtk->num_u3_ports);
return xhci_mtk_host_enable(mtk);
}
static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
{
struct device *dev = mtk->dev;
mtk->sys_clk = devm_clk_get(dev, "sys_ck");
if (IS_ERR(mtk->sys_clk)) {
dev_err(dev, "fail to get sys_ck\n");
return PTR_ERR(mtk->sys_clk);
}
mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck");
if (IS_ERR(mtk->ref_clk))
return PTR_ERR(mtk->ref_clk);
mtk->mcu_clk = devm_clk_get_optional(dev, "mcu_ck");
if (IS_ERR(mtk->mcu_clk))
return PTR_ERR(mtk->mcu_clk);
mtk->dma_clk = devm_clk_get_optional(dev, "dma_ck");
return PTR_ERR_OR_ZERO(mtk->dma_clk);
}
static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
{
int ret;
ret = clk_prepare_enable(mtk->ref_clk);
if (ret) {
dev_err(mtk->dev, "failed to enable ref_clk\n");
goto ref_clk_err;
}
ret = clk_prepare_enable(mtk->sys_clk);
if (ret) {
dev_err(mtk->dev, "failed to enable sys_clk\n");
goto sys_clk_err;
}
ret = clk_prepare_enable(mtk->mcu_clk);
if (ret) {
dev_err(mtk->dev, "failed to enable mcu_clk\n");
goto mcu_clk_err;
}
ret = clk_prepare_enable(mtk->dma_clk);
if (ret) {
dev_err(mtk->dev, "failed to enable dma_clk\n");
goto dma_clk_err;
}
return 0;
dma_clk_err:
clk_disable_unprepare(mtk->mcu_clk);
mcu_clk_err:
clk_disable_unprepare(mtk->sys_clk);
sys_clk_err:
clk_disable_unprepare(mtk->ref_clk);
ref_clk_err:
return ret;
}
static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
{
clk_disable_unprepare(mtk->dma_clk);
clk_disable_unprepare(mtk->mcu_clk);
clk_disable_unprepare(mtk->sys_clk);
clk_disable_unprepare(mtk->ref_clk);
}
/* only clocks can be turn off for ip-sleep wakeup mode */
static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable)
{
u32 reg, msk, val;
switch (mtk->uwk_vers) {
case SSUSB_UWK_V1:
reg = mtk->uwk_reg_base + PERI_WK_CTRL1;
msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P;
val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0;
break;
case SSUSB_UWK_V2:
reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;
val = enable ? msk : 0;
break;
default:
return;
}
regmap_update_bits(mtk->uwk, reg, msk, val);
}
static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk,
struct device_node *dn)
{
struct of_phandle_args args;
int ret;
/* Wakeup function is optional */
mtk->uwk_en = of_property_read_bool(dn, "wakeup-source");
if (!mtk->uwk_en)
return 0;
ret = of_parse_phandle_with_fixed_args(dn,
"mediatek,syscon-wakeup", 2, 0, &args);
if (ret)
return ret;
mtk->uwk_reg_base = args.args[0];
mtk->uwk_vers = args.args[1];
mtk->uwk = syscon_node_to_regmap(args.np);
of_node_put(args.np);
dev_info(mtk->dev, "uwk - reg:0x%x, version:%d\n",
mtk->uwk_reg_base, mtk->uwk_vers);
return PTR_ERR_OR_ZERO(mtk->uwk);
}
static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable)
{
if (mtk->uwk_en)
usb_wakeup_ip_sleep_set(mtk, enable);
}
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
bool xhci_vendor_is_streaming(struct xhci_hcd *xhci)
{
struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
if (ops && ops->is_streaming)
return ops->is_streaming(xhci);
return 0;
}
static int xhci_mtk_bus_suspend(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
if (xhci_vendor_is_streaming(xhci)) {
pr_info("%s - USB_OFFLOAD bypass\n", __func__);
return 0;
}
ret = xhci_bus_suspend(hcd);
return ret;
}
static int xhci_mtk_bus_resume(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
if (xhci_vendor_is_streaming(xhci)) {
pr_info("%s - USB_OFFLOAD bypass\n", __func__);
return 0;
}
ret = xhci_bus_resume(hcd);
return ret;
}
#endif
static int xhci_mtk_setup(struct usb_hcd *hcd);
static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
.reset = xhci_mtk_setup,
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
.bus_suspend = xhci_mtk_bus_suspend,
.bus_resume = xhci_mtk_bus_resume,
#endif
};
static struct hc_driver __read_mostly xhci_mtk_hc_driver;
static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
{
int ret;
ret = regulator_enable(mtk->vbus);
if (ret) {
dev_err(mtk->dev, "failed to enable vbus\n");
return ret;
}
ret = regulator_enable(mtk->vusb33);
if (ret) {
dev_err(mtk->dev, "failed to enable vusb33\n");
regulator_disable(mtk->vbus);
return ret;
}
return 0;
}
static void xhci_mtk_ldos_disable(struct xhci_hcd_mtk *mtk)
{
regulator_disable(mtk->vbus);
regulator_disable(mtk->vusb33);
}
static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
{
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
/*
* As of now platform drivers don't provide MSI support so we ensure
* here that the generic code does not try to make a pci_dev from our
* dev struct in order to setup MSI
*/
xhci->quirks |= XHCI_PLAT;
xhci->quirks |= XHCI_MTK_HOST;
/*
* MTK host controller gives a spurious successful event after a
* short transfer. Ignore it.
*/
xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
if (mtk->lpm_support)
xhci->quirks |= XHCI_LPM_SUPPORT;
if (mtk->u2_lpm_disable)
xhci->quirks |= XHCI_HW_LPM_DISABLE;
/*
* MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream,
* and it's 3 when support it.
*/
if (xhci->hci_version < 0x100 && HCC_MAX_PSA(xhci->hcc_params) == 4)
xhci->quirks |= XHCI_BROKEN_STREAMS;
}
/* called during probe() after chip reset completes */
static int xhci_mtk_setup(struct usb_hcd *hcd)
{
struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
int ret;
if (usb_hcd_is_primary_hcd(hcd)) {
ret = xhci_mtk_ssusb_config(mtk);
if (ret)
return ret;
}
ret = xhci_gen_setup(hcd, xhci_mtk_quirks);
if (ret)
return ret;
if (usb_hcd_is_primary_hcd(hcd)) {
ret = xhci_mtk_sch_init(mtk);
if (ret)
return ret;
}
return ret;
}
static int xhci_mtk_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct xhci_hcd_mtk *mtk;
const struct hc_driver *driver;
struct xhci_hcd *xhci;
struct resource *res;
struct usb_hcd *hcd;
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
struct platform_device *offload_pdev;
struct device_node *offload_node;
struct xhci_vendor_ops *ops;
#endif
int ret = -ENODEV;
int irq;
if (usb_disabled())
return -ENODEV;
driver = &xhci_mtk_hc_driver;
mtk = devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL);
if (!mtk)
return -ENOMEM;
mtk->dev = dev;
mtk->vbus = devm_regulator_get(dev, "vbus");
if (IS_ERR(mtk->vbus)) {
dev_err(dev, "fail to get vbus\n");
return PTR_ERR(mtk->vbus);
}
mtk->vusb33 = devm_regulator_get(dev, "vusb33");
if (IS_ERR(mtk->vusb33)) {
dev_err(dev, "fail to get vusb33\n");
return PTR_ERR(mtk->vusb33);
}
ret = xhci_mtk_clks_get(mtk);
if (ret)
return ret;
mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable");
mtk->u2_lpm_disable = of_property_read_bool(node, "usb2-lpm-disable");
/* optional property, ignore the error if it does not exist */
of_property_read_u32(node, "mediatek,u3p-dis-msk",
&mtk->u3p_dis_msk);
ret = usb_wakeup_of_property_parse(mtk, node);
if (ret) {
dev_err(dev, "failed to parse uwk property\n");
return ret;
}
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
device_enable_async_suspend(dev);
ret = xhci_mtk_ldos_enable(mtk);
if (ret)
goto disable_pm;
ret = xhci_mtk_clks_enable(mtk);
if (ret)
goto disable_ldos;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = irq;
goto disable_clk;
}
/* Initialize dma_mask and coherent_dma_mask to 32-bits */
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
goto disable_clk;
hcd = usb_create_hcd(driver, dev, dev_name(dev));
if (!hcd) {
ret = -ENOMEM;
goto disable_clk;
}
/*
* USB 2.0 roothub is stored in the platform_device.
* Swap it with mtk HCD.
*/
mtk->hcd = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, mtk);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac");
hcd->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto put_usb2_hcd;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc");
if (res) { /* ippc register is optional */
mtk->ippc_regs = devm_ioremap(dev, res->start, resource_size(res));
if (IS_ERR(mtk->ippc_regs)) {
ret = PTR_ERR(mtk->ippc_regs);
goto put_usb2_hcd;
}
mtk->has_ippc = true;
} else {
mtk->has_ippc = false;
}
device_init_wakeup(dev, true);
xhci = hcd_to_xhci(hcd);
xhci->main_hcd = hcd;
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
/* get vendor_ops data */
offload_node = of_parse_phandle(node, "mediatek,usb-offload", 0);
if (offload_node) {
pr_info("%s %d\n", __func__, __LINE__);
offload_pdev = of_find_device_by_node(offload_node);
of_node_put(offload_node);
if (offload_pdev) {
ops = dev_get_drvdata(&offload_pdev->dev);
if (ops) {
dev_info(dev, "set offload vendor_ops data\n");
xhci->vendor_ops = ops;
} else
dev_info(dev, "failed to get offload data\n");
} else
dev_info(dev, "failed to get offload platform device\n");
}
#endif
/*
* imod_interval is the interrupt moderation value in nanoseconds.
* The increment interval is 8 times as much as that defined in
* the xHCI spec on MTK's controller.
*/
xhci->imod_interval = 5000;
device_property_read_u32(dev, "imod-interval-ns", &xhci->imod_interval);
xhci->shared_hcd = usb_create_shared_hcd(driver, dev,
dev_name(dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
goto disable_device_wakeup;
}
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto put_usb3_hcd;
if (HCC_MAX_PSA(xhci->hcc_params) >= 4 &&
!(xhci->quirks & XHCI_BROKEN_STREAMS))
xhci->shared_hcd->can_do_streams = 1;
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
if (ret)
goto dealloc_usb2_hcd;
xhci_mtk_dbg_init(mtk);
device_set_wakeup_enable(&hcd->self.root_hub->dev, 1);
device_set_wakeup_enable(&xhci->shared_hcd->self.root_hub->dev, 1);
mtk_xhci_wakelock_lock(mtk);
return 0;
dealloc_usb2_hcd:
usb_remove_hcd(hcd);
put_usb3_hcd:
xhci_mtk_sch_exit(mtk);
usb_put_hcd(xhci->shared_hcd);
disable_device_wakeup:
device_init_wakeup(dev, false);
put_usb2_hcd:
usb_put_hcd(hcd);
disable_clk:
xhci_mtk_clks_disable(mtk);
disable_ldos:
xhci_mtk_ldos_disable(mtk);
disable_pm:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
return ret;
}
static int xhci_mtk_remove(struct platform_device *dev)
{
struct xhci_hcd_mtk *mtk = platform_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct usb_hcd *shared_hcd = xhci->shared_hcd;
pm_runtime_put_noidle(&dev->dev);
pm_runtime_disable(&dev->dev);
#if defined(CONFIG_USB_HOST_SAMSUNG_FEATURE)
/* In order to prevent kernel panic */
if (!pm_runtime_suspended(&xhci->shared_hcd->self.root_hub->dev)) {
pr_info("%s, shared_hcd pm_runtime_forbid\n", __func__);
pm_runtime_forbid(&xhci->shared_hcd->self.root_hub->dev);
}
if (!pm_runtime_suspended(&xhci->main_hcd->self.root_hub->dev)) {
pr_info("%s, main_hcd pm_runtime_forbid\n", __func__);
pm_runtime_forbid(&xhci->main_hcd->self.root_hub->dev);
}
#endif
xhci->xhc_state |= XHCI_STATE_REMOVING;
#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
pr_info("%s - remove hcd (shared_hcd)\n", __func__);
#endif
usb_remove_hcd(shared_hcd);
xhci->shared_hcd = NULL;
device_init_wakeup(&dev->dev, false);
mtk_xhci_wakelock_unlock(mtk);
#ifdef CONFIG_USB_DEBUG_DETAILED_LOG
pr_info("%s - remove hcd (main)\n", __func__);
#endif
usb_remove_hcd(hcd);
usb_put_hcd(shared_hcd);
usb_put_hcd(hcd);
xhci_mtk_sch_exit(mtk);
xhci_mtk_clks_disable(mtk);
xhci_mtk_ldos_disable(mtk);
xhci_mtk_dbg_exit(mtk);
return 0;
}
/*
* if ip sleep fails, and all clocks are disabled, access register will hang
* AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
* and no need to check whether ip sleep failed or not; this will cause SPM
* to wake up system immediately after system suspend complete if ip sleep
* fails, it is what we wanted.
*/
static int __maybe_unused xhci_mtk_suspend(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
if (xhci_vendor_is_streaming(xhci)) {
pr_info("%s - USB_OFFLOAD bypass\n", __func__);
return 0;
}
#endif
xhci_dbg(xhci, "%s: stop port polling\n", __func__);
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
del_timer_sync(&hcd->rh_timer);
clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
del_timer_sync(&xhci->shared_hcd->rh_timer);
xhci_mtk_host_disable(mtk);
xhci_mtk_clks_disable(mtk);
usb_wakeup_set(mtk, true);
return 0;
}
static int __maybe_unused xhci_mtk_resume(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
#if IS_ENABLED(CONFIG_MTK_USB_OFFLOAD)
if (xhci_vendor_is_streaming(xhci)) {
pr_info("%s - USB_OFFLOAD bypass\n", __func__);
return 0;
}
#endif
usb_wakeup_set(mtk, false);
xhci_mtk_clks_enable(mtk);
xhci_mtk_host_enable(mtk);
xhci_dbg(xhci, "%s: restart port polling\n", __func__);
set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
usb_hcd_poll_rh_status(xhci->shared_hcd);
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
usb_hcd_poll_rh_status(hcd);
return 0;
}
static const struct dev_pm_ops xhci_mtk_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
};
#define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
#ifdef CONFIG_OF
static const struct of_device_id mtk_xhci_of_match[] = {
{ .compatible = "mediatek,mt8173-xhci"},
{ .compatible = "mediatek,mtk-xhci"},
{ },
};
MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
#endif
static struct platform_driver mtk_xhci_driver = {
.probe = xhci_mtk_probe,
.remove = xhci_mtk_remove,
.driver = {
.name = "xhci-mtk",
.pm = DEV_PM_OPS,
.of_match_table = of_match_ptr(mtk_xhci_of_match),
},
};
MODULE_ALIAS("platform:xhci-mtk");
static int __init xhci_mtk_init(void)
{
xhci_init_driver(&xhci_mtk_hc_driver, &xhci_mtk_overrides);
return platform_driver_register(&mtk_xhci_driver);
}
module_init(xhci_mtk_init);
static void __exit xhci_mtk_exit(void)
{
platform_driver_unregister(&mtk_xhci_driver);
}
module_exit(xhci_mtk_exit);
MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
MODULE_DESCRIPTION("MediaTek xHCI Host Controller Driver");
MODULE_LICENSE("GPL v2");
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