* - USB_DR_MODE_PERIPHERAL
* - USB_DR_MODE_HOST
* - USB_DR_MODE_OTG
+ * @hcd_enabled Host mode sub-driver initialization indicator.
+ * @gadget_enabled Peripheral mode sub-driver initialization indicator.
+ * @ll_hw_enabled Status of low-level hardware resources.
+ * @phy: The otg phy transceiver structure for phy control.
+ * @uphy: The otg phy transceiver structure for old USB phy control.
+ * @plat: The platform specific configuration data. This can be removed once
+ * all SoCs support usb transceiver.
+ * @supplies: Definition of USB power supplies
+ * @phyif: PHY interface width
* @lock: Spinlock that protects all the driver data structures
* @priv: Stores a pointer to the struct usb_hcd
* @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
* These are for peripheral mode:
*
* @driver: USB gadget driver
- * @phy: The otg phy transceiver structure for phy control.
- * @uphy: The otg phy transceiver structure for old USB phy control.
- * @plat: The platform specific configuration data. This can be removed once
- * all SoCs support usb transceiver.
- * @supplies: Definition of USB power supplies
- * @phyif: PHY interface width
* @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
* @num_of_eps: Number of available EPs (excluding EP0)
* @debug_root: Root directrory for debugfs.
enum usb_dr_mode dr_mode;
unsigned int hcd_enabled:1;
unsigned int gadget_enabled:1;
+ unsigned int ll_hw_enabled:1;
struct phy *phy;
struct usb_phy *uphy;
+ struct dwc2_hsotg_plat *plat;
struct regulator_bulk_data supplies[ARRAY_SIZE(dwc2_hsotg_supply_names)];
+ u32 phyif;
spinlock_t lock;
void *priv;
#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
/* Gadget structures */
struct usb_gadget_driver *driver;
- struct dwc2_hsotg_plat *plat;
-
- u32 phyif;
int fifo_mem;
unsigned int dedicated_fifos:1;
unsigned char num_of_eps;
extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
-
+extern int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
+extern int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
/*
* Dump core registers and SPRAM
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/regulator/consumer.h>
#include <linux/of_platform.h>
-#include <linux/phy/phy.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/phy.h>
-#include <linux/platform_data/s3c-hsotg.h>
#include "core.h"
#include "hw.h"
/* note, don't believe we have any call for the fifo routines */
};
-/**
- * dwc2_hsotg_phy_enable - enable platform phy dev
- * @hsotg: The driver state
- *
- * A wrapper for platform code responsible for controlling
- * low-level USB code
- */
-static void dwc2_hsotg_phy_enable(struct dwc2_hsotg *hsotg)
-{
- struct platform_device *pdev = to_platform_device(hsotg->dev);
-
- dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
-
- if (hsotg->uphy)
- usb_phy_init(hsotg->uphy);
- else if (hsotg->plat && hsotg->plat->phy_init)
- hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
- else {
- phy_init(hsotg->phy);
- phy_power_on(hsotg->phy);
- }
-}
-
-/**
- * dwc2_hsotg_phy_disable - disable platform phy dev
- * @hsotg: The driver state
- *
- * A wrapper for platform code responsible for controlling
- * low-level USB code
- */
-static void dwc2_hsotg_phy_disable(struct dwc2_hsotg *hsotg)
-{
- struct platform_device *pdev = to_platform_device(hsotg->dev);
-
- if (hsotg->uphy)
- usb_phy_shutdown(hsotg->uphy);
- else if (hsotg->plat && hsotg->plat->phy_exit)
- hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
- else {
- phy_power_off(hsotg->phy);
- phy_exit(hsotg->phy);
- }
-}
-
/**
* dwc2_hsotg_init - initalize the usb core
* @hsotg: The driver state
hsotg->gadget.dev.of_node = hsotg->dev->of_node;
hsotg->gadget.speed = USB_SPEED_UNKNOWN;
- ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
- if (ret) {
- dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
- goto err;
+ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) {
+ ret = dwc2_lowlevel_hw_enable(hsotg);
+ if (ret)
+ goto err;
}
- dwc2_hsotg_phy_enable(hsotg);
if (!IS_ERR_OR_NULL(hsotg->uphy))
otg_set_peripheral(hsotg->uphy->otg, &hsotg->gadget);
if (!IS_ERR_OR_NULL(hsotg->uphy))
otg_set_peripheral(hsotg->uphy->otg, NULL);
- dwc2_hsotg_phy_disable(hsotg);
- regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
+ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
+ dwc2_lowlevel_hw_disable(hsotg);
return 0;
}
int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
{
struct device *dev = hsotg->dev;
- struct dwc2_hsotg_plat *plat = dev->platform_data;
int epnum;
int ret;
int i;
u32 p_tx_fifo[] = DWC2_G_P_LEGACY_TX_FIFO_SIZE;
- /* Set default UTMI width */
- hsotg->phyif = GUSBCFG_PHYIF16;
-
/* Initialize to legacy fifo configuration values */
hsotg->g_rx_fifo_sz = 2048;
hsotg->g_np_g_tx_fifo_sz = 1024;
for (i = 0; i < MAX_EPS_CHANNELS; i++)
dev_dbg(dev, "Periodic TXFIFO%2d size: %d\n", i,
hsotg->g_tx_fifo_sz[i]);
- /*
- * If platform probe couldn't find a generic PHY or an old style
- * USB PHY, fall back to pdata
- */
- if (IS_ERR_OR_NULL(hsotg->phy) && IS_ERR_OR_NULL(hsotg->uphy)) {
- plat = dev_get_platdata(dev);
- if (!plat) {
- dev_err(dev,
- "no platform data or transceiver defined\n");
- return -EPROBE_DEFER;
- }
- hsotg->plat = plat;
- } else if (hsotg->phy) {
- /*
- * If using the generic PHY framework, check if the PHY bus
- * width is 8-bit and set the phyif appropriately.
- */
- if (phy_get_bus_width(hsotg->phy) == 8)
- hsotg->phyif = GUSBCFG_PHYIF8;
- }
-
- hsotg->clk = devm_clk_get(dev, "otg");
- if (IS_ERR(hsotg->clk)) {
- hsotg->clk = NULL;
- dev_dbg(dev, "cannot get otg clock\n");
- }
hsotg->gadget.max_speed = USB_SPEED_HIGH;
hsotg->gadget.ops = &dwc2_hsotg_gadget_ops;
else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
- /* reset the system */
-
- ret = clk_prepare_enable(hsotg->clk);
- if (ret) {
- dev_err(dev, "failed to enable otg clk\n");
- goto err_clk;
- }
-
-
- /* regulators */
-
- for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
- hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];
-
- ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
- if (ret) {
- dev_err(dev, "failed to request supplies: %d\n", ret);
- goto err_clk;
- }
-
- ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
-
- if (ret) {
- dev_err(dev, "failed to enable supplies: %d\n", ret);
- goto err_clk;
- }
-
- /* usb phy enable */
- dwc2_hsotg_phy_enable(hsotg);
-
/*
* Force Device mode before initialization.
* This allows correctly configuring fifo for device mode.
ret = dwc2_hsotg_hw_cfg(hsotg);
if (ret) {
dev_err(hsotg->dev, "Hardware configuration failed: %d\n", ret);
- goto err_clk;
+ return ret;
}
dwc2_hsotg_init(hsotg);
DWC2_CTRL_BUFF_SIZE, GFP_KERNEL);
if (!hsotg->ctrl_buff) {
dev_err(dev, "failed to allocate ctrl request buff\n");
- ret = -ENOMEM;
- goto err_supplies;
+ return -ENOMEM;
}
hsotg->ep0_buff = devm_kzalloc(hsotg->dev,
DWC2_CTRL_BUFF_SIZE, GFP_KERNEL);
if (!hsotg->ep0_buff) {
dev_err(dev, "failed to allocate ctrl reply buff\n");
- ret = -ENOMEM;
- goto err_supplies;
+ return -ENOMEM;
}
ret = devm_request_irq(hsotg->dev, irq, dwc2_hsotg_irq, IRQF_SHARED,
dev_name(hsotg->dev), hsotg);
if (ret < 0) {
- dwc2_hsotg_phy_disable(hsotg);
- clk_disable_unprepare(hsotg->clk);
- regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
dev_err(dev, "cannot claim IRQ for gadget\n");
- goto err_supplies;
+ return ret;
}
/* hsotg->num_of_eps holds number of EPs other than ep0 */
if (hsotg->num_of_eps == 0) {
dev_err(dev, "wrong number of EPs (zero)\n");
- ret = -EINVAL;
- goto err_supplies;
+ return -EINVAL;
}
/* setup endpoint information */
GFP_KERNEL);
if (!hsotg->ctrl_req) {
dev_err(dev, "failed to allocate ctrl req\n");
- ret = -ENOMEM;
- goto err_supplies;
+ return -ENOMEM;
}
/* initialise the endpoints now the core has been initialised */
epnum, 0);
}
- /* disable power and clock */
- dwc2_hsotg_phy_disable(hsotg);
-
- ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
- if (ret) {
- dev_err(dev, "failed to disable supplies: %d\n", ret);
- goto err_supplies;
- }
-
ret = usb_add_gadget_udc(dev, &hsotg->gadget);
if (ret)
- goto err_supplies;
+ return ret;
dwc2_hsotg_dump(hsotg);
return 0;
-
-err_supplies:
- dwc2_hsotg_phy_disable(hsotg);
-err_clk:
- clk_disable_unprepare(hsotg->clk);
-
- return ret;
}
/**
int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg)
{
usb_del_gadget_udc(&hsotg->gadget);
- clk_disable_unprepare(hsotg->clk);
return 0;
}
int dwc2_hsotg_suspend(struct dwc2_hsotg *hsotg)
{
unsigned long flags;
- int ret = 0;
if (hsotg->lx_state != DWC2_L0)
- return ret;
+ return 0;
if (hsotg->driver) {
int ep;
hsotg->gadget.speed = USB_SPEED_UNKNOWN;
spin_unlock_irqrestore(&hsotg->lock, flags);
- dwc2_hsotg_phy_disable(hsotg);
-
for (ep = 0; ep < hsotg->num_of_eps; ep++) {
if (hsotg->eps_in[ep])
dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
if (hsotg->eps_out[ep])
dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
}
-
- ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
- clk_disable(hsotg->clk);
}
- return ret;
+ return 0;
}
int dwc2_hsotg_resume(struct dwc2_hsotg *hsotg)
{
unsigned long flags;
- int ret = 0;
if (hsotg->lx_state == DWC2_L2)
- return ret;
+ return 0;
if (hsotg->driver) {
dev_info(hsotg->dev, "resuming usb gadget %s\n",
hsotg->driver->driver.name);
- clk_enable(hsotg->clk);
- ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
- hsotg->supplies);
-
- dwc2_hsotg_phy_enable(hsotg);
-
spin_lock_irqsave(&hsotg->lock, flags);
dwc2_hsotg_core_init_disconnected(hsotg, false);
if (hsotg->enabled)
spin_unlock_irqrestore(&hsotg->lock, flags);
}
- return ret;
+ return 0;
}
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/of_device.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_data/s3c-hsotg.h>
#include <linux/usb/of.h>
.hibernation = -1,
};
+static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
+{
+ struct platform_device *pdev = to_platform_device(hsotg->dev);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
+ hsotg->supplies);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(hsotg->clk);
+ if (ret)
+ return ret;
+
+ if (hsotg->uphy)
+ ret = usb_phy_init(hsotg->uphy);
+ else if (hsotg->plat && hsotg->plat->phy_init)
+ ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
+ else {
+ ret = phy_power_on(hsotg->phy);
+ if (ret == 0)
+ ret = phy_init(hsotg->phy);
+ }
+
+ return ret;
+}
+
+/**
+ * dwc2_lowlevel_hw_enable - enable platform lowlevel hw resources
+ * @hsotg: The driver state
+ *
+ * A wrapper for platform code responsible for controlling
+ * low-level USB platform resources (phy, clock, regulators)
+ */
+int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
+{
+ int ret = __dwc2_lowlevel_hw_enable(hsotg);
+
+ if (ret == 0)
+ hsotg->ll_hw_enabled = true;
+ return ret;
+}
+
+static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
+{
+ struct platform_device *pdev = to_platform_device(hsotg->dev);
+ int ret = 0;
+
+ if (hsotg->uphy)
+ usb_phy_shutdown(hsotg->uphy);
+ else if (hsotg->plat && hsotg->plat->phy_exit)
+ ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
+ else {
+ ret = phy_exit(hsotg->phy);
+ if (ret == 0)
+ ret = phy_power_off(hsotg->phy);
+ }
+ if (ret)
+ return ret;
+
+ clk_disable_unprepare(hsotg->clk);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
+ hsotg->supplies);
+
+ return ret;
+}
+
+/**
+ * dwc2_lowlevel_hw_disable - disable platform lowlevel hw resources
+ * @hsotg: The driver state
+ *
+ * A wrapper for platform code responsible for controlling
+ * low-level USB platform resources (phy, clock, regulators)
+ */
+int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
+{
+ int ret = __dwc2_lowlevel_hw_disable(hsotg);
+
+ if (ret == 0)
+ hsotg->ll_hw_enabled = false;
+ return ret;
+}
+
+static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
+{
+ int i, ret;
+
+ /* Set default UTMI width */
+ hsotg->phyif = GUSBCFG_PHYIF16;
+
+ /*
+ * Attempt to find a generic PHY, then look for an old style
+ * USB PHY and then fall back to pdata
+ */
+ hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");
+ if (IS_ERR(hsotg->phy)) {
+ hsotg->phy = NULL;
+ hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(hsotg->uphy))
+ hsotg->uphy = NULL;
+ else
+ hsotg->plat = dev_get_platdata(hsotg->dev);
+ }
+
+ if (hsotg->phy) {
+ /*
+ * If using the generic PHY framework, check if the PHY bus
+ * width is 8-bit and set the phyif appropriately.
+ */
+ if (phy_get_bus_width(hsotg->phy) == 8)
+ hsotg->phyif = GUSBCFG_PHYIF8;
+ }
+
+ if (!hsotg->phy && !hsotg->uphy && !hsotg->plat) {
+ dev_err(hsotg->dev, "no platform data or transceiver defined\n");
+ return -EPROBE_DEFER;
+ }
+
+ /* Clock */
+ hsotg->clk = devm_clk_get(hsotg->dev, "otg");
+ if (IS_ERR(hsotg->clk)) {
+ hsotg->clk = NULL;
+ dev_dbg(hsotg->dev, "cannot get otg clock\n");
+ }
+
+ /* Regulators */
+ for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
+ hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];
+
+ ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies),
+ hsotg->supplies);
+ if (ret) {
+ dev_err(hsotg->dev, "failed to request supplies: %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
/**
* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
* DWC_otg driver
if (hsotg->gadget_enabled)
dwc2_hsotg_remove(hsotg);
+ if (hsotg->ll_hw_enabled)
+ dwc2_lowlevel_hw_disable(hsotg);
+
return 0;
}
struct dwc2_core_params defparams;
struct dwc2_hsotg *hsotg;
struct resource *res;
- struct phy *phy;
- struct usb_phy *uphy;
int retval;
int irq;
"Configuration mismatch. Forcing peripheral mode\n");
}
- /*
- * Attempt to find a generic PHY, then look for an old style
- * USB PHY
- */
- phy = devm_phy_get(&dev->dev, "usb2-phy");
- if (IS_ERR(phy)) {
- hsotg->phy = NULL;
- uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(uphy))
- hsotg->uphy = NULL;
- else
- hsotg->uphy = uphy;
- } else {
- hsotg->phy = phy;
- phy_power_on(hsotg->phy);
- phy_init(hsotg->phy);
- }
-
- spin_lock_init(&hsotg->lock);
-
- /* Detect config values from hardware */
- retval = dwc2_get_hwparams(hsotg);
+ retval = dwc2_lowlevel_hw_init(hsotg);
if (retval)
return retval;
+ spin_lock_init(&hsotg->lock);
+
hsotg->core_params = devm_kzalloc(&dev->dev,
sizeof(*hsotg->core_params), GFP_KERNEL);
if (!hsotg->core_params)
dwc2_set_all_params(hsotg->core_params, -1);
+ retval = dwc2_lowlevel_hw_enable(hsotg);
+ if (retval)
+ return retval;
+
+ /* Detect config values from hardware */
+ retval = dwc2_get_hwparams(hsotg);
+ if (retval)
+ goto error;
+
/* Validate parameter values */
dwc2_set_parameters(hsotg, params);
if (hsotg->dr_mode != USB_DR_MODE_HOST) {
retval = dwc2_gadget_init(hsotg, irq);
if (retval)
- return retval;
+ goto error;
hsotg->gadget_enabled = 1;
}
if (retval) {
if (hsotg->gadget_enabled)
dwc2_hsotg_remove(hsotg);
- return retval;
+ goto error;
}
hsotg->hcd_enabled = 1;
}
dwc2_debugfs_init(hsotg);
+ /* Gadget code manages lowlevel hw on its own */
+ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
+ dwc2_lowlevel_hw_disable(hsotg);
+
+ return 0;
+
+error:
+ dwc2_lowlevel_hw_disable(hsotg);
return retval;
}
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
int ret = 0;
- if (dwc2_is_device_mode(dwc2)) {
- ret = dwc2_hsotg_suspend(dwc2);
- } else {
- phy_exit(dwc2->phy);
- phy_power_off(dwc2->phy);
+ if (dwc2_is_device_mode(dwc2))
+ dwc2_hsotg_suspend(dwc2);
+
+ if (dwc2->ll_hw_enabled)
+ ret = __dwc2_lowlevel_hw_disable(dwc2);
- }
return ret;
}
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
int ret = 0;
- if (dwc2_is_device_mode(dwc2)) {
+ if (dwc2->ll_hw_enabled) {
+ ret = __dwc2_lowlevel_hw_enable(dwc2);
+ if (ret)
+ return ret;
+ }
+
+ if (dwc2_is_device_mode(dwc2))
ret = dwc2_hsotg_resume(dwc2);
- } else {
- phy_power_on(dwc2->phy);
- phy_init(dwc2->phy);
- }
return ret;
}
projects / linux-2.6-microblaze.git / commitdiff