#include <linux/list.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
#include "musb_core.h"
#include "omap2430.h"
+struct omap2430_glue {
+ struct device *dev;
+ struct platform_device *musb;
+ struct clk *clk;
+};
+#define glue_to_musb(g) platform_get_drvdata(g->musb)
static struct timer_list musb_idle_timer;
spin_lock_irqsave(&musb->lock, flags);
- devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
-
switch (musb->xceiv->state) {
case OTG_STATE_A_WAIT_BCON:
- devctl &= ~MUSB_DEVCTL_SESSION;
- musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
if (devctl & MUSB_DEVCTL_BDEVICE) {
}
-void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
+static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
{
unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
static unsigned long last_timer;
mod_timer(&musb_idle_timer, timeout);
}
-void musb_platform_enable(struct musb *musb)
-{
-}
-void musb_platform_disable(struct musb *musb)
-{
-}
-static void omap_set_vbus(struct musb *musb, int is_on)
+static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
{
u8 devctl;
+ unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+ int ret = 1;
/* HDRC controls CPEN, but beware current surges during device
* connect. They can trigger transient overcurrent conditions
* that must be ignored.
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
if (is_on) {
- musb->is_active = 1;
- musb->xceiv->default_a = 1;
- musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
- devctl |= MUSB_DEVCTL_SESSION;
-
- MUSB_HST_MODE(musb);
+ if (musb->xceiv->state == OTG_STATE_A_IDLE) {
+ /* start the session */
+ devctl |= MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+ /*
+ * Wait for the musb to set as A device to enable the
+ * VBUS
+ */
+ while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
+
+ cpu_relax();
+
+ if (time_after(jiffies, timeout)) {
+ dev_err(musb->controller,
+ "configured as A device timeout");
+ ret = -EINVAL;
+ break;
+ }
+ }
+
+ if (ret && musb->xceiv->set_vbus)
+ otg_set_vbus(musb->xceiv, 1);
+ } else {
+ musb->is_active = 1;
+ musb->xceiv->default_a = 1;
+ musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
+ devctl |= MUSB_DEVCTL_SESSION;
+ MUSB_HST_MODE(musb);
+ }
} else {
musb->is_active = 0;
musb_readb(musb->mregs, MUSB_DEVCTL));
}
-static int musb_platform_resume(struct musb *musb);
-
-int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
+static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
{
u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
return 0;
}
-int __init musb_platform_init(struct musb *musb, void *board_data)
+static inline void omap2430_low_level_exit(struct musb *musb)
{
u32 l;
- struct omap_musb_board_data *data = board_data;
+
+ /* in any role */
+ l = musb_readl(musb->mregs, OTG_FORCESTDBY);
+ l |= ENABLEFORCE; /* enable MSTANDBY */
+ musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+
+ l = musb_readl(musb->mregs, OTG_SYSCONFIG);
+ l |= ENABLEWAKEUP; /* enable wakeup */
+ musb_writel(musb->mregs, OTG_SYSCONFIG, l);
+}
+
+static inline void omap2430_low_level_init(struct musb *musb)
+{
+ u32 l;
+
+ l = musb_readl(musb->mregs, OTG_SYSCONFIG);
+ l &= ~ENABLEWAKEUP; /* disable wakeup */
+ musb_writel(musb->mregs, OTG_SYSCONFIG, l);
+
+ l = musb_readl(musb->mregs, OTG_FORCESTDBY);
+ l &= ~ENABLEFORCE; /* disable MSTANDBY */
+ musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+}
+
+/* blocking notifier support */
+static int musb_otg_notifications(struct notifier_block *nb,
+ unsigned long event, void *unused)
+{
+ struct musb *musb = container_of(nb, struct musb, nb);
+ struct device *dev = musb->controller;
+ struct musb_hdrc_platform_data *pdata = dev->platform_data;
+ struct omap_musb_board_data *data = pdata->board_data;
+
+ switch (event) {
+ case USB_EVENT_ID:
+ DBG(4, "ID GND\n");
+
+ if (is_otg_enabled(musb)) {
+#ifdef CONFIG_USB_GADGET_MUSB_HDRC
+ if (musb->gadget_driver) {
+ otg_init(musb->xceiv);
+
+ if (data->interface_type ==
+ MUSB_INTERFACE_UTMI)
+ omap2430_musb_set_vbus(musb, 1);
+
+ }
+#endif
+ } else {
+ otg_init(musb->xceiv);
+ if (data->interface_type ==
+ MUSB_INTERFACE_UTMI)
+ omap2430_musb_set_vbus(musb, 1);
+ }
+ break;
+
+ case USB_EVENT_VBUS:
+ DBG(4, "VBUS Connect\n");
+
+ otg_init(musb->xceiv);
+ break;
+
+ case USB_EVENT_NONE:
+ DBG(4, "VBUS Disconnect\n");
+
+ if (data->interface_type == MUSB_INTERFACE_UTMI) {
+ if (musb->xceiv->set_vbus)
+ otg_set_vbus(musb->xceiv, 0);
+ }
+ otg_shutdown(musb->xceiv);
+ break;
+ default:
+ DBG(4, "ID float\n");
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int omap2430_musb_init(struct musb *musb)
+{
+ u32 l, status = 0;
+ struct device *dev = musb->controller;
+ struct musb_hdrc_platform_data *plat = dev->platform_data;
+ struct omap_musb_board_data *data = plat->board_data;
/* We require some kind of external transceiver, hooked
* up through ULPI. TWL4030-family PMICs include one,
return -ENODEV;
}
- musb_platform_resume(musb);
+ omap2430_low_level_init(musb);
l = musb_readl(musb->mregs, OTG_SYSCONFIG);
l &= ~ENABLEWAKEUP; /* disable wakeup */
musb_readl(musb->mregs, OTG_INTERFSEL),
musb_readl(musb->mregs, OTG_SIMENABLE));
- if (is_host_enabled(musb))
- musb->board_set_vbus = omap_set_vbus;
+ musb->nb.notifier_call = musb_otg_notifications;
+ status = otg_register_notifier(musb->xceiv, &musb->nb);
+
+ if (status)
+ DBG(1, "notification register failed\n");
+
+ /* check whether cable is already connected */
+ if (musb->xceiv->state ==OTG_STATE_B_IDLE)
+ musb_otg_notifications(&musb->nb, 1,
+ musb->xceiv->gadget);
setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
return 0;
}
-#ifdef CONFIG_PM
-void musb_platform_save_context(struct musb *musb,
- struct musb_context_registers *musb_context)
+static int omap2430_musb_exit(struct musb *musb)
{
- musb_context->otg_sysconfig = musb_readl(musb->mregs, OTG_SYSCONFIG);
- musb_context->otg_forcestandby = musb_readl(musb->mregs, OTG_FORCESTDBY);
-}
+ del_timer_sync(&musb_idle_timer);
-void musb_platform_restore_context(struct musb *musb,
- struct musb_context_registers *musb_context)
-{
- musb_writel(musb->mregs, OTG_SYSCONFIG, musb_context->otg_sysconfig);
- musb_writel(musb->mregs, OTG_FORCESTDBY, musb_context->otg_forcestandby);
+ omap2430_low_level_exit(musb);
+ otg_put_transceiver(musb->xceiv);
+
+ return 0;
}
-#endif
-static int musb_platform_suspend(struct musb *musb)
+static const struct musb_platform_ops omap2430_ops = {
+ .init = omap2430_musb_init,
+ .exit = omap2430_musb_exit,
+
+ .set_mode = omap2430_musb_set_mode,
+ .try_idle = omap2430_musb_try_idle,
+
+ .set_vbus = omap2430_musb_set_vbus,
+};
+
+static u64 omap2430_dmamask = DMA_BIT_MASK(32);
+
+static int __init omap2430_probe(struct platform_device *pdev)
{
- u32 l;
+ struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
+ struct platform_device *musb;
+ struct omap2430_glue *glue;
+ struct clk *clk;
- if (!musb->clock)
- return 0;
+ int ret = -ENOMEM;
- /* in any role */
- l = musb_readl(musb->mregs, OTG_FORCESTDBY);
- l |= ENABLEFORCE; /* enable MSTANDBY */
- musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+ glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+ if (!glue) {
+ dev_err(&pdev->dev, "failed to allocate glue context\n");
+ goto err0;
+ }
- l = musb_readl(musb->mregs, OTG_SYSCONFIG);
- l |= ENABLEWAKEUP; /* enable wakeup */
- musb_writel(musb->mregs, OTG_SYSCONFIG, l);
+ musb = platform_device_alloc("musb-hdrc", -1);
+ if (!musb) {
+ dev_err(&pdev->dev, "failed to allocate musb device\n");
+ goto err1;
+ }
- otg_set_suspend(musb->xceiv, 1);
+ clk = clk_get(&pdev->dev, "ick");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ ret = PTR_ERR(clk);
+ goto err2;
+ }
- if (musb->set_clock)
- musb->set_clock(musb->clock, 0);
- else
- clk_disable(musb->clock);
+ ret = clk_enable(clk);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to enable clock\n");
+ goto err3;
+ }
+
+ musb->dev.parent = &pdev->dev;
+ musb->dev.dma_mask = &omap2430_dmamask;
+ musb->dev.coherent_dma_mask = omap2430_dmamask;
+
+ glue->dev = &pdev->dev;
+ glue->musb = musb;
+ glue->clk = clk;
+
+ pdata->platform_ops = &omap2430_ops;
+
+ platform_set_drvdata(pdev, glue);
+
+ ret = platform_device_add_resources(musb, pdev->resource,
+ pdev->num_resources);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add resources\n");
+ goto err4;
+ }
+
+ ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add platform_data\n");
+ goto err4;
+ }
+
+ ret = platform_device_add(musb);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register musb device\n");
+ goto err4;
+ }
return 0;
+
+err4:
+ clk_disable(clk);
+
+err3:
+ clk_put(clk);
+
+err2:
+ platform_device_put(musb);
+
+err1:
+ kfree(glue);
+
+err0:
+ return ret;
}
-static int musb_platform_resume(struct musb *musb)
+static int __exit omap2430_remove(struct platform_device *pdev)
{
- u32 l;
+ struct omap2430_glue *glue = platform_get_drvdata(pdev);
- if (!musb->clock)
- return 0;
+ platform_device_del(glue->musb);
+ platform_device_put(glue->musb);
+ clk_disable(glue->clk);
+ clk_put(glue->clk);
+ kfree(glue);
- otg_set_suspend(musb->xceiv, 0);
+ return 0;
+}
- if (musb->set_clock)
- musb->set_clock(musb->clock, 1);
- else
- clk_enable(musb->clock);
+#ifdef CONFIG_PM
+static void omap2430_save_context(struct musb *musb)
+{
+ musb->context.otg_sysconfig = musb_readl(musb->mregs, OTG_SYSCONFIG);
+ musb->context.otg_forcestandby = musb_readl(musb->mregs, OTG_FORCESTDBY);
+}
- l = musb_readl(musb->mregs, OTG_SYSCONFIG);
- l &= ~ENABLEWAKEUP; /* disable wakeup */
- musb_writel(musb->mregs, OTG_SYSCONFIG, l);
+static void omap2430_restore_context(struct musb *musb)
+{
+ musb_writel(musb->mregs, OTG_SYSCONFIG, musb->context.otg_sysconfig);
+ musb_writel(musb->mregs, OTG_FORCESTDBY, musb->context.otg_forcestandby);
+}
- l = musb_readl(musb->mregs, OTG_FORCESTDBY);
- l &= ~ENABLEFORCE; /* disable MSTANDBY */
- musb_writel(musb->mregs, OTG_FORCESTDBY, l);
+static int omap2430_suspend(struct device *dev)
+{
+ struct omap2430_glue *glue = dev_get_drvdata(dev);
+ struct musb *musb = glue_to_musb(glue);
+
+ omap2430_low_level_exit(musb);
+ otg_set_suspend(musb->xceiv, 1);
+ omap2430_save_context(musb);
+ clk_disable(glue->clk);
return 0;
}
-
-int musb_platform_exit(struct musb *musb)
+static int omap2430_resume(struct device *dev)
{
+ struct omap2430_glue *glue = dev_get_drvdata(dev);
+ struct musb *musb = glue_to_musb(glue);
+ int ret;
+
+ ret = clk_enable(glue->clk);
+ if (ret) {
+ dev_err(dev, "faled to enable clock\n");
+ return ret;
+ }
- musb_platform_suspend(musb);
+ omap2430_low_level_init(musb);
+ omap2430_restore_context(musb);
+ otg_set_suspend(musb->xceiv, 0);
- otg_put_transceiver(musb->xceiv);
return 0;
}
+
+static struct dev_pm_ops omap2430_pm_ops = {
+ .suspend = omap2430_suspend,
+ .resume = omap2430_resume,
+};
+
+#define DEV_PM_OPS (&omap2430_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif
+
+static struct platform_driver omap2430_driver = {
+ .remove = __exit_p(omap2430_remove),
+ .driver = {
+ .name = "musb-omap2430",
+ .pm = DEV_PM_OPS,
+ },
+};
+
+MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
+MODULE_LICENSE("GPL v2");
+
+static int __init omap2430_init(void)
+{
+ return platform_driver_probe(&omap2430_driver, omap2430_probe);
+}
+subsys_initcall(omap2430_init);
+
+static void __exit omap2430_exit(void)
+{
+ platform_driver_unregister(&omap2430_driver);
+}
+module_exit(omap2430_exit);
projects / mv-sheeva.git / blobdiff