1 files changed, 437 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
new file mode 100644
index 000000000000..f3664d6af661
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -0,0 +1,437 @@
+/*
+ * Renesas USB driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include "./common.h"
+
+#define USBHSF_RUNTIME_PWCTRL	(1 << 0)
+
+/* status */
+#define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
+#define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
+#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
+#define usbhsc_flags_has(p, b) ((p)->flags &   (b))
+
+/*
+ * platform call back
+ *
+ * renesas usb support platform callback function.
+ * Below macro call it.
+ * if platform doesn't have callback, it return 0 (no error)
+ */
+#define usbhs_platform_call(priv, func, args...)\
+	(!(priv) ? -ENODEV :			\
+	 !((priv)->pfunc->func) ? 0 :		\
+	 (priv)->pfunc->func(args))
+
+/*
+ *		common functions
+ */
+u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
+{
+	return ioread16(priv->base + reg);
+}
+
+void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
+{
+	iowrite16(data, priv->base + reg);
+}
+
+void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
+{
+	u16 val = usbhs_read(priv, reg);
+
+	val &= ~mask;
+	val |= data & mask;
+
+	usbhs_write(priv, reg, val);
+}
+
+struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
+{
+	return dev_get_drvdata(&pdev->dev);
+}
+
+/*
+ *		syscfg functions
+ */
+void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
+{
+	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
+}
+
+void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable)
+{
+	usbhs_bset(priv, SYSCFG, HSE, enable ? HSE : 0);
+}
+
+void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable)
+{
+	usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0);
+}
+
+void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
+{
+	u16 mask = DCFM | DRPD | DPRPU;
+	u16 val  = DCFM | DRPD;
+
+	/*
+	 * if enable
+	 *
+	 * - select Host mode
+	 * - D+ Line/D- Line Pull-down
+	 */
+	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
+}
+
+void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
+{
+	u16 mask = DCFM | DRPD | DPRPU;
+	u16 val  = DPRPU;
+
+	/*
+	 * if enable
+	 *
+	 * - select Function mode
+	 * - D+ Line Pull-up
+	 */
+	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
+}
+
+/*
+ *		frame functions
+ */
+int usbhs_frame_get_num(struct usbhs_priv *priv)
+{
+	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
+}
+
+/*
+ *		local functions
+ */
+static void usbhsc_bus_ctrl(struct usbhs_priv *priv, int enable)
+{
+	int wait = usbhs_get_dparam(priv, buswait_bwait);
+	u16 data = 0;
+
+	if (enable) {
+		/* set bus wait if platform have */
+		if (wait)
+			usbhs_bset(priv, BUSWAIT, 0x000F, wait);
+	}
+	usbhs_write(priv, DVSTCTR, data);
+}
+
+/*
+ *		platform default param
+ */
+static u32 usbhsc_default_pipe_type[] = {
+		USB_ENDPOINT_XFER_CONTROL,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_ISOC,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_BULK,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+		USB_ENDPOINT_XFER_INT,
+};
+
+/*
+ *		power control
+ */
+static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
+{
+	struct device *dev = usbhs_priv_to_dev(priv);
+
+	if (enable) {
+		/* enable PM */
+		pm_runtime_get_sync(dev);
+
+		/* USB on */
+		usbhs_sys_clock_ctrl(priv, enable);
+		usbhsc_bus_ctrl(priv, enable);
+	} else {
+		/* USB off */
+		usbhsc_bus_ctrl(priv, enable);
+		usbhs_sys_clock_ctrl(priv, enable);
+
+		/* disable PM */
+		pm_runtime_put_sync(dev);
+	}
+}
+
+/*
+ *		notify hotplug
+ */
+static void usbhsc_notify_hotplug(struct work_struct *work)
+{
+	struct usbhs_priv *priv = container_of(work,
+					       struct usbhs_priv,
+					       notify_hotplug_work.work);
+	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+	int id;
+	int enable;
+	int ret;
+
+	/*
+	 * get vbus status from platform
+	 */
+	enable = usbhs_platform_call(priv, get_vbus, pdev);
+
+	/*
+	 * get id from platform
+	 */
+	id = usbhs_platform_call(priv, get_id, pdev);
+
+	if (enable && !mod) {
+		ret = usbhs_mod_change(priv, id);
+		if (ret < 0)
+			return;
+
+		dev_dbg(&pdev->dev, "%s enable\n", __func__);
+
+		/* power on */
+		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+			usbhsc_power_ctrl(priv, enable);
+
+		/* module start */
+		usbhs_mod_call(priv, start, priv);
+
+	} else if (!enable && mod) {
+		dev_dbg(&pdev->dev, "%s disable\n", __func__);
+
+		/* module stop */
+		usbhs_mod_call(priv, stop, priv);
+
+		/* power off */
+		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+			usbhsc_power_ctrl(priv, enable);
+
+		usbhs_mod_change(priv, -1);
+
+		/* reset phy for next connection */
+		usbhs_platform_call(priv, phy_reset, pdev);
+	}
+}
+
+int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	int delay = usbhs_get_dparam(priv, detection_delay);
+
+	/*
+	 * This functions will be called in interrupt.
+	 * To make sure safety context,
+	 * use workqueue for usbhs_notify_hotplug
+	 */
+	schedule_delayed_work(&priv->notify_hotplug_work, delay);
+	return 0;
+}
+
+/*
+ *		platform functions
+ */
+static int __devinit usbhs_probe(struct platform_device *pdev)
+{
+	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
+	struct renesas_usbhs_driver_callback *dfunc;
+	struct usbhs_priv *priv;
+	struct resource *res;
+	unsigned int irq;
+	int ret;
+
+	/* check platform information */
+	if (!info ||
+	    !info->platform_callback.get_id) {
+		dev_err(&pdev->dev, "no platform information\n");
+		return -EINVAL;
+	}
+
+	/* platform data */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!res || (int)irq <= 0) {
+		dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
+		return -ENODEV;
+	}
+
+	/* usb private data */
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		dev_err(&pdev->dev, "Could not allocate priv\n");
+		return -ENOMEM;
+	}
+
+	priv->base = ioremap_nocache(res->start, resource_size(res));
+	if (!priv->base) {
+		dev_err(&pdev->dev, "ioremap error.\n");
+		ret = -ENOMEM;
+		goto probe_end_kfree;
+	}
+
+	/*
+	 * care platform info
+	 */
+	priv->pfunc	= &info->platform_callback;
+	priv->dparam	= &info->driver_param;
+
+	/* set driver callback functions for platform */
+	dfunc			= &info->driver_callback;
+	dfunc->notify_hotplug	= usbhsc_drvcllbck_notify_hotplug;
+
+	/* set default param if platform doesn't have */
+	if (!priv->dparam->pipe_type) {
+		priv->dparam->pipe_type = usbhsc_default_pipe_type;
+		priv->dparam->pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
+	}
+
+	/* FIXME */
+	/* runtime power control ? */
+	if (priv->pfunc->get_vbus)
+		usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
+
+	/*
+	 * priv settings
+	 */
+	priv->irq	= irq;
+	priv->pdev	= pdev;
+	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
+	spin_lock_init(usbhs_priv_to_lock(priv));
+
+	/* call pipe and module init */
+	ret = usbhs_pipe_probe(priv);
+	if (ret < 0)
+		goto probe_end_iounmap;
+
+	ret = usbhs_mod_probe(priv);
+	if (ret < 0)
+		goto probe_end_pipe_exit;
+
+	/* dev_set_drvdata should be called after usbhs_mod_init */
+	dev_set_drvdata(&pdev->dev, priv);
+
+	/*
+	 * deviece reset here because
+	 * USB device might be used in boot loader.
+	 */
+	usbhs_sys_clock_ctrl(priv, 0);
+
+	/*
+	 * platform call
+	 *
+	 * USB phy setup might depend on CPU/Board.
+	 * If platform has its callback functions,
+	 * call it here.
+	 */
+	ret = usbhs_platform_call(priv, hardware_init, pdev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "platform prove failed.\n");
+		goto probe_end_mod_exit;
+	}
+
+	/* reset phy for connection */
+	usbhs_platform_call(priv, phy_reset, pdev);
+
+	/* power control */
+	pm_runtime_enable(&pdev->dev);
+	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
+		usbhsc_power_ctrl(priv, 1);
+		usbhs_mod_autonomy_mode(priv);
+	}
+
+	/*
+	 * manual call notify_hotplug for cold plug
+	 */
+	ret = usbhsc_drvcllbck_notify_hotplug(pdev);
+	if (ret < 0)
+		goto probe_end_call_remove;
+
+	dev_info(&pdev->dev, "probed\n");
+
+	return ret;
+
+probe_end_call_remove:
+	usbhs_platform_call(priv, hardware_exit, pdev);
+probe_end_mod_exit:
+	usbhs_mod_remove(priv);
+probe_end_pipe_exit:
+	usbhs_pipe_remove(priv);
+probe_end_iounmap:
+	iounmap(priv->base);
+probe_end_kfree:
+	kfree(priv);
+
+	dev_info(&pdev->dev, "probe failed\n");
+
+	return ret;
+}
+
+static int __devexit usbhs_remove(struct platform_device *pdev)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	struct renesas_usbhs_platform_info *info = pdev->dev.platform_data;
+	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
+
+	dev_dbg(&pdev->dev, "usb remove\n");
+
+	dfunc->notify_hotplug = NULL;
+
+	/* power off */
+	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
+		usbhsc_power_ctrl(priv, 0);
+
+	pm_runtime_disable(&pdev->dev);
+
+	usbhs_platform_call(priv, hardware_exit, pdev);
+	usbhs_mod_remove(priv);
+	usbhs_pipe_remove(priv);
+	iounmap(priv->base);
+	kfree(priv);
+
+	return 0;
+}
+
+static struct platform_driver renesas_usbhs_driver = {
+	.driver		= {
+		.name	= "renesas_usbhs",
+	},
+	.probe		= usbhs_probe,
+	.remove		= __devexit_p(usbhs_remove),
+};
+
+static int __init usbhs_init(void)
+{
+	return platform_driver_register(&renesas_usbhs_driver);
+}
+
+static void __exit usbhs_exit(void)
+{
+	platform_driver_unregister(&renesas_usbhs_driver);
+}
+
+module_init(usbhs_init);
+module_exit(usbhs_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Renesas USB driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");