#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>
#include "core.h"
#include "hcd.h"
+#include "debug.h"
static const char dwc2_driver_name[] = "dwc2";
.reload_ctl = 0,
.ahbcfg = 0x10,
.uframe_sched = 0,
+ .external_id_pin_ctl = -1,
+ .hibernation = -1,
};
static const struct dwc2_core_params params_rk3066 = {
.host_ls_low_power_phy_clk = -1,
.ts_dline = -1,
.reload_ctl = -1,
- .ahbcfg = 0x7, /* INCR16 */
+ .ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+ GAHBCFG_HBSTLEN_SHIFT,
.uframe_sched = -1,
+ .external_id_pin_ctl = -1,
+ .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;
+
+ if (hsotg->clk) {
+ 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;
+
+ if (hsotg->clk)
+ 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)) {
+ ret = PTR_ERR(hsotg->phy);
+ switch (ret) {
+ case -ENODEV:
+ case -ENOSYS:
+ hsotg->phy = NULL;
+ break;
+ case -EPROBE_DEFER:
+ return ret;
+ default:
+ dev_err(hsotg->dev, "error getting phy %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (!hsotg->phy) {
+ hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(hsotg->uphy)) {
+ ret = PTR_ERR(hsotg->uphy);
+ switch (ret) {
+ case -ENODEV:
+ case -ENXIO:
+ hsotg->uphy = NULL;
+ break;
+ case -EPROBE_DEFER:
+ return ret;
+ default:
+ dev_err(hsotg->dev, "error getting usb phy %d\n",
+ ret);
+ return ret;
+ }
+ }
+ }
+
+ 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;
+ }
+
+ /* 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
{
struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
+ dwc2_debugfs_exit(hsotg);
if (hsotg->hcd_enabled)
dwc2_hcd_remove(hsotg);
if (hsotg->gadget_enabled)
- s3c_hsotg_remove(hsotg);
+ 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;
if (retval)
return retval;
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ hsotg->regs = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(hsotg->regs))
+ return PTR_ERR(hsotg->regs);
+
+ dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
+ (unsigned long)res->start, hsotg->regs);
+
+ hsotg->dr_mode = usb_get_dr_mode(&dev->dev);
+ if (IS_ENABLED(CONFIG_USB_DWC2_HOST) &&
+ hsotg->dr_mode != USB_DR_MODE_HOST) {
+ hsotg->dr_mode = USB_DR_MODE_HOST;
+ dev_warn(hsotg->dev,
+ "Configuration mismatch. Forcing host mode\n");
+ } else if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) &&
+ hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
+ hsotg->dr_mode = USB_DR_MODE_PERIPHERAL;
+ dev_warn(hsotg->dev,
+ "Configuration mismatch. Forcing peripheral mode\n");
+ }
+
+ 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)
+ return -ENOMEM;
+
+ dwc2_set_all_params(hsotg->core_params, -1);
+
irq = platform_get_irq(dev, 0);
if (irq < 0) {
dev_err(&dev->dev, "missing IRQ resource\n");
if (retval)
return retval;
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- hsotg->regs = devm_ioremap_resource(&dev->dev, res);
- if (IS_ERR(hsotg->regs))
- return PTR_ERR(hsotg->regs);
-
- dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
- (unsigned long)res->start, hsotg->regs);
-
- hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
+ retval = dwc2_lowlevel_hw_enable(hsotg);
+ if (retval)
+ return retval;
- /*
- * 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);
- }
+ /* Detect config values from hardware */
+ retval = dwc2_get_hwparams(hsotg);
+ if (retval)
+ goto error;
- spin_lock_init(&hsotg->lock);
- mutex_init(&hsotg->init_mutex);
+ /* 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 (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
- retval = dwc2_hcd_init(hsotg, irq, params);
+ retval = dwc2_hcd_init(hsotg, irq);
if (retval) {
if (hsotg->gadget_enabled)
- s3c_hsotg_remove(hsotg);
- return retval;
+ dwc2_hsotg_remove(hsotg);
+ goto error;
}
hsotg->hcd_enabled = 1;
}
platform_set_drvdata(dev, hsotg);
+ 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 = s3c_hsotg_suspend(dwc2);
- } else {
- if (dwc2->lx_state == DWC2_L0)
- return 0;
- 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)) {
- ret = s3c_hsotg_resume(dwc2);
- } else {
- phy_power_on(dwc2->phy);
- phy_init(dwc2->phy);
-
+ 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);
+
return ret;
}
Code Review / kvmfornfv.git / blobdiff