usb: mtu3: host only mode support
supports host only mode and the code is ported from
host/xhci-mtk.c
IPPC register shared between host and device is moved
into common glue layer.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index 52fc0ed..facb76c 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -21,14 +21,16 @@
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include "mtu3.h"
+#include "mtu3_dr.h"
/* u2-port0 should be powered on and enabled; */
-int ssusb_check_clocks(struct mtu3 *mtu, u32 ex_clks)
+int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
{
- void __iomem *ibase = mtu->ippc_base;
+ void __iomem *ibase = ssusb->ippc_base;
u32 value, check_val;
int ret;
@@ -38,136 +40,209 @@ int ssusb_check_clocks(struct mtu3 *mtu, u32 ex_clks)
ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value,
(check_val == (value & check_val)), 100, 20000);
if (ret) {
- dev_err(mtu->dev, "clks of sts1 are not stable!\n");
+ 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(mtu->dev, "mac2 clock is not stable\n");
+ dev_err(ssusb->dev, "mac2 clock is not stable\n");
return ret;
}
return 0;
}
-static int ssusb_rscs_init(struct mtu3 *mtu)
+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_rscs_init(struct ssusb_mtk *ssusb)
{
int ret = 0;
- ret = regulator_enable(mtu->vusb33);
+ ret = regulator_enable(ssusb->vusb33);
if (ret) {
- dev_err(mtu->dev, "failed to enable vusb33\n");
+ dev_err(ssusb->dev, "failed to enable vusb33\n");
goto vusb33_err;
}
- ret = clk_prepare_enable(mtu->sys_clk);
+ ret = clk_prepare_enable(ssusb->sys_clk);
if (ret) {
- dev_err(mtu->dev, "failed to enable sys_clk\n");
+ dev_err(ssusb->dev, "failed to enable sys_clk\n");
goto clk_err;
}
- ret = phy_init(mtu->phy);
+ ret = ssusb_phy_init(ssusb);
if (ret) {
- dev_err(mtu->dev, "failed to init phy\n");
+ dev_err(ssusb->dev, "failed to init phy\n");
goto phy_init_err;
}
- ret = phy_power_on(mtu->phy);
+ ret = ssusb_phy_power_on(ssusb);
if (ret) {
- dev_err(mtu->dev, "failed to power on phy\n");
+ dev_err(ssusb->dev, "failed to power on phy\n");
goto phy_err;
}
return 0;
phy_err:
- phy_exit(mtu->phy);
+ ssusb_phy_exit(ssusb);
phy_init_err:
- clk_disable_unprepare(mtu->sys_clk);
+ clk_disable_unprepare(ssusb->sys_clk);
clk_err:
- regulator_disable(mtu->vusb33);
+ regulator_disable(ssusb->vusb33);
vusb33_err:
return ret;
}
-static void ssusb_rscs_exit(struct mtu3 *mtu)
+static void ssusb_rscs_exit(struct ssusb_mtk *ssusb)
{
- clk_disable_unprepare(mtu->sys_clk);
- regulator_disable(mtu->vusb33);
- phy_power_off(mtu->phy);
- phy_exit(mtu->phy);
+ clk_disable_unprepare(ssusb->sys_clk);
+ regulator_disable(ssusb->vusb33);
+ ssusb_phy_power_off(ssusb);
+ ssusb_phy_exit(ssusb);
}
-static void ssusb_ip_sw_reset(struct mtu3 *mtu)
+static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb)
{
- mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
+ /* reset whole ip (xhci & u3d) */
+ mtu3_setbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
udelay(1);
- mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
+ mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
}
-static int get_ssusb_rscs(struct platform_device *pdev, struct mtu3 *mtu)
+static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
{
struct device_node *node = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct resource *res;
+ int i;
+ int ret;
- mtu->phy = devm_of_phy_get_by_index(dev, node, 0);
- if (IS_ERR(mtu->phy)) {
- dev_err(dev, "failed to get phy\n");
- return PTR_ERR(mtu->phy);
+ 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;
}
- mtu->irq = platform_get_irq(pdev, 0);
- if (mtu->irq <= 0) {
- dev_err(dev, "fail to get irq number\n");
- return -ENODEV;
- }
- dev_info(dev, "irq %d\n", mtu->irq);
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac");
- mtu->mac_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(mtu->mac_base)) {
- dev_err(dev, "error mapping memory for dev mac\n");
- return PTR_ERR(mtu->mac_base);
+ 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]);
+ }
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc");
- mtu->ippc_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(mtu->ippc_base)) {
+ ssusb->ippc_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ssusb->ippc_base)) {
dev_err(dev, "failed to map memory for ippc\n");
- return PTR_ERR(mtu->ippc_base);
+ return PTR_ERR(ssusb->ippc_base);
}
- mtu->vusb33 = devm_regulator_get(&pdev->dev, "vusb33");
- if (IS_ERR(mtu->vusb33)) {
+ ssusb->vusb33 = devm_regulator_get(&pdev->dev, "vusb33");
+ if (IS_ERR(ssusb->vusb33)) {
dev_err(dev, "failed to get vusb33\n");
- return PTR_ERR(mtu->vusb33);
+ return PTR_ERR(ssusb->vusb33);
}
- mtu->sys_clk = devm_clk_get(dev, "sys_ck");
- if (IS_ERR(mtu->sys_clk)) {
+ 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(mtu->sys_clk);
+ return PTR_ERR(ssusb->sys_clk);
}
+ ssusb->dr_mode = usb_get_dr_mode(dev);
+ if (ssusb->dr_mode == USB_DR_MODE_UNKNOWN) {
+ dev_err(dev, "dr_mode is error\n");
+ return -EINVAL;
+ }
+
+ if (ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
+ return 0;
+
+ /* if host role is supported */
+ ret = ssusb_wakeup_of_property_parse(ssusb, node);
+ if (ret)
+ return ret;
+
return 0;
}
static int mtu3_probe(struct platform_device *pdev)
{
+ struct device_node *node = pdev->dev.of_node;
struct device *dev = &pdev->dev;
- struct mtu3 *mtu;
+ struct ssusb_mtk *ssusb;
int ret = -ENOMEM;
/* all elements are set to ZERO as default value */
- mtu = devm_kzalloc(dev, sizeof(struct mtu3), GFP_KERNEL);
- if (!mtu)
+ ssusb = devm_kzalloc(dev, sizeof(*ssusb), GFP_KERNEL);
+ if (!ssusb)
return -ENOMEM;
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
@@ -176,11 +251,10 @@ static int mtu3_probe(struct platform_device *pdev)
return -ENOTSUPP;
}
- platform_set_drvdata(pdev, mtu);
- mtu->dev = dev;
- spin_lock_init(&mtu->lock);
+ platform_set_drvdata(pdev, ssusb);
+ ssusb->dev = dev;
- ret = get_ssusb_rscs(pdev, mtu);
+ ret = get_ssusb_rscs(pdev, ssusb);
if (ret)
return ret;
@@ -189,22 +263,45 @@ static int mtu3_probe(struct platform_device *pdev)
pm_runtime_get_sync(dev);
device_enable_async_suspend(dev);
- ret = ssusb_rscs_init(mtu);
+ ret = ssusb_rscs_init(ssusb);
if (ret)
goto comm_init_err;
- ssusb_ip_sw_reset(mtu);
+ ssusb_ip_sw_reset(ssusb);
- ret = ssusb_gadget_init(mtu);
- if (ret) {
- dev_err(dev, "failed to initialize gadget\n");
+ 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;
+ default:
+ dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode);
+ ret = -EINVAL;
goto comm_exit;
}
return 0;
comm_exit:
- ssusb_rscs_exit(mtu);
+ ssusb_rscs_exit(ssusb);
comm_init_err:
pm_runtime_put_sync(dev);
@@ -215,16 +312,73 @@ static int mtu3_probe(struct platform_device *pdev)
static int mtu3_remove(struct platform_device *pdev)
{
- struct mtu3 *mtu = platform_get_drvdata(pdev);
+ struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
- ssusb_gadget_exit(mtu);
- ssusb_rscs_exit(mtu);
+ switch (ssusb->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ ssusb_gadget_exit(ssusb);
+ break;
+ case USB_DR_MODE_HOST:
+ ssusb_host_exit(ssusb);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ssusb_rscs_exit(ssusb);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
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 platform_device *pdev = to_platform_device(dev);
+ struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
+
+ 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);
+ clk_disable_unprepare(ssusb->sys_clk);
+ ssusb_wakeup_enable(ssusb);
+
+ return 0;
+}
+
+static int __maybe_unused mtu3_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (!ssusb->is_host)
+ return 0;
+
+ ssusb_wakeup_disable(ssusb);
+ clk_prepare_enable(ssusb->sys_clk);
+ ssusb_phy_power_on(ssusb);
+ ssusb_host_enable(ssusb);
+
+ return 0;
+}
+
+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[] = {
@@ -241,6 +395,7 @@ static struct platform_driver mtu3_driver = {
.remove = mtu3_remove,
.driver = {
.name = MTU3_DRIVER_NAME,
+ .pm = DEV_PM_OPS,
.of_match_table = of_match_ptr(mtu3_of_match),
},
};