forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
530 lines
11 KiB
530 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (C) 2016 MediaTek Inc. |
|
* |
|
* Author: Chunfeng Yun <[email protected]> |
|
*/ |
|
|
|
#include <linux/clk.h> |
|
#include <linux/dma-mapping.h> |
|
#include <linux/iopoll.h> |
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/of_address.h> |
|
#include <linux/of_irq.h> |
|
#include <linux/platform_device.h> |
|
|
|
#include "mtu3.h" |
|
#include "mtu3_dr.h" |
|
#include "mtu3_debug.h" |
|
|
|
/* u2-port0 should be powered on and enabled; */ |
|
int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks) |
|
{ |
|
void __iomem *ibase = ssusb->ippc_base; |
|
u32 value, check_val; |
|
int ret; |
|
|
|
check_val = ex_clks | SSUSB_SYS125_RST_B_STS | SSUSB_SYSPLL_STABLE | |
|
SSUSB_REF_RST_B_STS; |
|
|
|
ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value, |
|
(check_val == (value & check_val)), 100, 20000); |
|
if (ret) { |
|
dev_err(ssusb->dev, "clks of sts1 are not stable!\n"); |
|
return ret; |
|
} |
|
|
|
ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS2, value, |
|
(value & SSUSB_U2_MAC_SYS_RST_B_STS), 100, 10000); |
|
if (ret) { |
|
dev_err(ssusb->dev, "mac2 clock is not stable\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ssusb_phy_init(struct ssusb_mtk *ssusb) |
|
{ |
|
int i; |
|
int ret; |
|
|
|
for (i = 0; i < ssusb->num_phys; i++) { |
|
ret = phy_init(ssusb->phys[i]); |
|
if (ret) |
|
goto exit_phy; |
|
} |
|
return 0; |
|
|
|
exit_phy: |
|
for (; i > 0; i--) |
|
phy_exit(ssusb->phys[i - 1]); |
|
|
|
return ret; |
|
} |
|
|
|
static int ssusb_phy_exit(struct ssusb_mtk *ssusb) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ssusb->num_phys; i++) |
|
phy_exit(ssusb->phys[i]); |
|
|
|
return 0; |
|
} |
|
|
|
static int ssusb_phy_power_on(struct ssusb_mtk *ssusb) |
|
{ |
|
int i; |
|
int ret; |
|
|
|
for (i = 0; i < ssusb->num_phys; i++) { |
|
ret = phy_power_on(ssusb->phys[i]); |
|
if (ret) |
|
goto power_off_phy; |
|
} |
|
return 0; |
|
|
|
power_off_phy: |
|
for (; i > 0; i--) |
|
phy_power_off(ssusb->phys[i - 1]); |
|
|
|
return ret; |
|
} |
|
|
|
static void ssusb_phy_power_off(struct ssusb_mtk *ssusb) |
|
{ |
|
unsigned int i; |
|
|
|
for (i = 0; i < ssusb->num_phys; i++) |
|
phy_power_off(ssusb->phys[i]); |
|
} |
|
|
|
static int ssusb_clks_enable(struct ssusb_mtk *ssusb) |
|
{ |
|
int ret; |
|
|
|
ret = clk_prepare_enable(ssusb->sys_clk); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to enable sys_clk\n"); |
|
goto sys_clk_err; |
|
} |
|
|
|
ret = clk_prepare_enable(ssusb->ref_clk); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to enable ref_clk\n"); |
|
goto ref_clk_err; |
|
} |
|
|
|
ret = clk_prepare_enable(ssusb->mcu_clk); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to enable mcu_clk\n"); |
|
goto mcu_clk_err; |
|
} |
|
|
|
ret = clk_prepare_enable(ssusb->dma_clk); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to enable dma_clk\n"); |
|
goto dma_clk_err; |
|
} |
|
|
|
return 0; |
|
|
|
dma_clk_err: |
|
clk_disable_unprepare(ssusb->mcu_clk); |
|
mcu_clk_err: |
|
clk_disable_unprepare(ssusb->ref_clk); |
|
ref_clk_err: |
|
clk_disable_unprepare(ssusb->sys_clk); |
|
sys_clk_err: |
|
return ret; |
|
} |
|
|
|
static void ssusb_clks_disable(struct ssusb_mtk *ssusb) |
|
{ |
|
clk_disable_unprepare(ssusb->dma_clk); |
|
clk_disable_unprepare(ssusb->mcu_clk); |
|
clk_disable_unprepare(ssusb->ref_clk); |
|
clk_disable_unprepare(ssusb->sys_clk); |
|
} |
|
|
|
static int ssusb_rscs_init(struct ssusb_mtk *ssusb) |
|
{ |
|
int ret = 0; |
|
|
|
ret = regulator_enable(ssusb->vusb33); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to enable vusb33\n"); |
|
goto vusb33_err; |
|
} |
|
|
|
ret = ssusb_clks_enable(ssusb); |
|
if (ret) |
|
goto clks_err; |
|
|
|
ret = ssusb_phy_init(ssusb); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to init phy\n"); |
|
goto phy_init_err; |
|
} |
|
|
|
ret = ssusb_phy_power_on(ssusb); |
|
if (ret) { |
|
dev_err(ssusb->dev, "failed to power on phy\n"); |
|
goto phy_err; |
|
} |
|
|
|
return 0; |
|
|
|
phy_err: |
|
ssusb_phy_exit(ssusb); |
|
phy_init_err: |
|
ssusb_clks_disable(ssusb); |
|
clks_err: |
|
regulator_disable(ssusb->vusb33); |
|
vusb33_err: |
|
return ret; |
|
} |
|
|
|
static void ssusb_rscs_exit(struct ssusb_mtk *ssusb) |
|
{ |
|
ssusb_clks_disable(ssusb); |
|
regulator_disable(ssusb->vusb33); |
|
ssusb_phy_power_off(ssusb); |
|
ssusb_phy_exit(ssusb); |
|
} |
|
|
|
static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb) |
|
{ |
|
/* reset whole ip (xhci & u3d) */ |
|
mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); |
|
udelay(1); |
|
mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST); |
|
|
|
/* |
|
* device ip may be powered on in firmware/BROM stage before entering |
|
* kernel stage; |
|
* power down device ip, otherwise ip-sleep will fail when working as |
|
* host only mode |
|
*/ |
|
mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); |
|
} |
|
|
|
static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) |
|
{ |
|
struct device_node *node = pdev->dev.of_node; |
|
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; |
|
struct device *dev = &pdev->dev; |
|
int i; |
|
int ret; |
|
|
|
ssusb->vusb33 = devm_regulator_get(dev, "vusb33"); |
|
if (IS_ERR(ssusb->vusb33)) { |
|
dev_err(dev, "failed to get vusb33\n"); |
|
return PTR_ERR(ssusb->vusb33); |
|
} |
|
|
|
ssusb->sys_clk = devm_clk_get(dev, "sys_ck"); |
|
if (IS_ERR(ssusb->sys_clk)) { |
|
dev_err(dev, "failed to get sys clock\n"); |
|
return PTR_ERR(ssusb->sys_clk); |
|
} |
|
|
|
ssusb->ref_clk = devm_clk_get_optional(dev, "ref_ck"); |
|
if (IS_ERR(ssusb->ref_clk)) |
|
return PTR_ERR(ssusb->ref_clk); |
|
|
|
ssusb->mcu_clk = devm_clk_get_optional(dev, "mcu_ck"); |
|
if (IS_ERR(ssusb->mcu_clk)) |
|
return PTR_ERR(ssusb->mcu_clk); |
|
|
|
ssusb->dma_clk = devm_clk_get_optional(dev, "dma_ck"); |
|
if (IS_ERR(ssusb->dma_clk)) |
|
return PTR_ERR(ssusb->dma_clk); |
|
|
|
ssusb->num_phys = of_count_phandle_with_args(node, |
|
"phys", "#phy-cells"); |
|
if (ssusb->num_phys > 0) { |
|
ssusb->phys = devm_kcalloc(dev, ssusb->num_phys, |
|
sizeof(*ssusb->phys), GFP_KERNEL); |
|
if (!ssusb->phys) |
|
return -ENOMEM; |
|
} else { |
|
ssusb->num_phys = 0; |
|
} |
|
|
|
for (i = 0; i < ssusb->num_phys; i++) { |
|
ssusb->phys[i] = devm_of_phy_get_by_index(dev, node, i); |
|
if (IS_ERR(ssusb->phys[i])) { |
|
dev_err(dev, "failed to get phy-%d\n", i); |
|
return PTR_ERR(ssusb->phys[i]); |
|
} |
|
} |
|
|
|
ssusb->ippc_base = devm_platform_ioremap_resource_byname(pdev, "ippc"); |
|
if (IS_ERR(ssusb->ippc_base)) |
|
return PTR_ERR(ssusb->ippc_base); |
|
|
|
ssusb->dr_mode = usb_get_dr_mode(dev); |
|
if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN) |
|
ssusb->dr_mode = USB_DR_MODE_OTG; |
|
|
|
if (ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
|
goto out; |
|
|
|
/* if host role is supported */ |
|
ret = ssusb_wakeup_of_property_parse(ssusb, node); |
|
if (ret) { |
|
dev_err(dev, "failed to parse uwk property\n"); |
|
return ret; |
|
} |
|
|
|
/* optional property, ignore the error if it does not exist */ |
|
of_property_read_u32(node, "mediatek,u3p-dis-msk", |
|
&ssusb->u3p_dis_msk); |
|
|
|
otg_sx->vbus = devm_regulator_get(dev, "vbus"); |
|
if (IS_ERR(otg_sx->vbus)) { |
|
dev_err(dev, "failed to get vbus\n"); |
|
return PTR_ERR(otg_sx->vbus); |
|
} |
|
|
|
if (ssusb->dr_mode == USB_DR_MODE_HOST) |
|
goto out; |
|
|
|
/* if dual-role mode is supported */ |
|
otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd"); |
|
otg_sx->manual_drd_enabled = |
|
of_property_read_bool(node, "enable-manual-drd"); |
|
otg_sx->role_sw_used = of_property_read_bool(node, "usb-role-switch"); |
|
|
|
if (!otg_sx->role_sw_used && of_property_read_bool(node, "extcon")) { |
|
otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0); |
|
if (IS_ERR(otg_sx->edev)) { |
|
dev_err(ssusb->dev, "couldn't get extcon device\n"); |
|
return PTR_ERR(otg_sx->edev); |
|
} |
|
} |
|
|
|
out: |
|
dev_info(dev, "dr_mode: %d, is_u3_dr: %d, u3p_dis_msk: %x, drd: %s\n", |
|
ssusb->dr_mode, otg_sx->is_u3_drd, ssusb->u3p_dis_msk, |
|
otg_sx->manual_drd_enabled ? "manual" : "auto"); |
|
|
|
return 0; |
|
} |
|
|
|
static int mtu3_probe(struct platform_device *pdev) |
|
{ |
|
struct device_node *node = pdev->dev.of_node; |
|
struct device *dev = &pdev->dev; |
|
struct ssusb_mtk *ssusb; |
|
int ret = -ENOMEM; |
|
|
|
/* all elements are set to ZERO as default value */ |
|
ssusb = devm_kzalloc(dev, sizeof(*ssusb), GFP_KERNEL); |
|
if (!ssusb) |
|
return -ENOMEM; |
|
|
|
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); |
|
if (ret) { |
|
dev_err(dev, "No suitable DMA config available\n"); |
|
return -ENOTSUPP; |
|
} |
|
|
|
platform_set_drvdata(pdev, ssusb); |
|
ssusb->dev = dev; |
|
|
|
ret = get_ssusb_rscs(pdev, ssusb); |
|
if (ret) |
|
return ret; |
|
|
|
ssusb_debugfs_create_root(ssusb); |
|
|
|
/* enable power domain */ |
|
pm_runtime_enable(dev); |
|
pm_runtime_get_sync(dev); |
|
device_enable_async_suspend(dev); |
|
|
|
ret = ssusb_rscs_init(ssusb); |
|
if (ret) |
|
goto comm_init_err; |
|
|
|
ssusb_ip_sw_reset(ssusb); |
|
|
|
if (IS_ENABLED(CONFIG_USB_MTU3_HOST)) |
|
ssusb->dr_mode = USB_DR_MODE_HOST; |
|
else if (IS_ENABLED(CONFIG_USB_MTU3_GADGET)) |
|
ssusb->dr_mode = USB_DR_MODE_PERIPHERAL; |
|
|
|
/* default as host */ |
|
ssusb->is_host = !(ssusb->dr_mode == USB_DR_MODE_PERIPHERAL); |
|
|
|
switch (ssusb->dr_mode) { |
|
case USB_DR_MODE_PERIPHERAL: |
|
ret = ssusb_gadget_init(ssusb); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize gadget\n"); |
|
goto comm_exit; |
|
} |
|
break; |
|
case USB_DR_MODE_HOST: |
|
ret = ssusb_host_init(ssusb, node); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize host\n"); |
|
goto comm_exit; |
|
} |
|
break; |
|
case USB_DR_MODE_OTG: |
|
ret = ssusb_gadget_init(ssusb); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize gadget\n"); |
|
goto comm_exit; |
|
} |
|
|
|
ret = ssusb_host_init(ssusb, node); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize host\n"); |
|
goto gadget_exit; |
|
} |
|
|
|
ret = ssusb_otg_switch_init(ssusb); |
|
if (ret) { |
|
dev_err(dev, "failed to initialize switch\n"); |
|
goto host_exit; |
|
} |
|
break; |
|
default: |
|
dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode); |
|
ret = -EINVAL; |
|
goto comm_exit; |
|
} |
|
|
|
return 0; |
|
|
|
host_exit: |
|
ssusb_host_exit(ssusb); |
|
gadget_exit: |
|
ssusb_gadget_exit(ssusb); |
|
comm_exit: |
|
ssusb_rscs_exit(ssusb); |
|
comm_init_err: |
|
pm_runtime_put_sync(dev); |
|
pm_runtime_disable(dev); |
|
ssusb_debugfs_remove_root(ssusb); |
|
|
|
return ret; |
|
} |
|
|
|
static int mtu3_remove(struct platform_device *pdev) |
|
{ |
|
struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); |
|
|
|
switch (ssusb->dr_mode) { |
|
case USB_DR_MODE_PERIPHERAL: |
|
ssusb_gadget_exit(ssusb); |
|
break; |
|
case USB_DR_MODE_HOST: |
|
ssusb_host_exit(ssusb); |
|
break; |
|
case USB_DR_MODE_OTG: |
|
ssusb_otg_switch_exit(ssusb); |
|
ssusb_gadget_exit(ssusb); |
|
ssusb_host_exit(ssusb); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
ssusb_rscs_exit(ssusb); |
|
pm_runtime_put_sync(&pdev->dev); |
|
pm_runtime_disable(&pdev->dev); |
|
ssusb_debugfs_remove_root(ssusb); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* when support dual-role mode, we reject suspend when |
|
* it works as device mode; |
|
*/ |
|
static int __maybe_unused mtu3_suspend(struct device *dev) |
|
{ |
|
struct ssusb_mtk *ssusb = dev_get_drvdata(dev); |
|
|
|
dev_dbg(dev, "%s\n", __func__); |
|
|
|
/* REVISIT: disconnect it for only device mode? */ |
|
if (!ssusb->is_host) |
|
return 0; |
|
|
|
ssusb_host_disable(ssusb, true); |
|
ssusb_phy_power_off(ssusb); |
|
ssusb_clks_disable(ssusb); |
|
ssusb_wakeup_set(ssusb, true); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused mtu3_resume(struct device *dev) |
|
{ |
|
struct ssusb_mtk *ssusb = dev_get_drvdata(dev); |
|
int ret; |
|
|
|
dev_dbg(dev, "%s\n", __func__); |
|
|
|
if (!ssusb->is_host) |
|
return 0; |
|
|
|
ssusb_wakeup_set(ssusb, false); |
|
ret = ssusb_clks_enable(ssusb); |
|
if (ret) |
|
goto clks_err; |
|
|
|
ret = ssusb_phy_power_on(ssusb); |
|
if (ret) |
|
goto phy_err; |
|
|
|
ssusb_host_enable(ssusb); |
|
|
|
return 0; |
|
|
|
phy_err: |
|
ssusb_clks_disable(ssusb); |
|
clks_err: |
|
return ret; |
|
} |
|
|
|
static const struct dev_pm_ops mtu3_pm_ops = { |
|
SET_SYSTEM_SLEEP_PM_OPS(mtu3_suspend, mtu3_resume) |
|
}; |
|
|
|
#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &mtu3_pm_ops : NULL) |
|
|
|
#ifdef CONFIG_OF |
|
|
|
static const struct of_device_id mtu3_of_match[] = { |
|
{.compatible = "mediatek,mt8173-mtu3",}, |
|
{.compatible = "mediatek,mtu3",}, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(of, mtu3_of_match); |
|
|
|
#endif |
|
|
|
static struct platform_driver mtu3_driver = { |
|
.probe = mtu3_probe, |
|
.remove = mtu3_remove, |
|
.driver = { |
|
.name = MTU3_DRIVER_NAME, |
|
.pm = DEV_PM_OPS, |
|
.of_match_table = of_match_ptr(mtu3_of_match), |
|
}, |
|
}; |
|
module_platform_driver(mtu3_driver); |
|
|
|
MODULE_AUTHOR("Chunfeng Yun <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_DESCRIPTION("MediaTek USB3 DRD Controller Driver");
|
|
|