diff options
Diffstat (limited to 'drivers/usb/musb/omap2430.c')
| -rw-r--r-- | drivers/usb/musb/omap2430.c | 156 |
1 files changed, 131 insertions, 25 deletions
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index 5fdb9da8dd56..a538fe17a966 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -30,10 +30,12 @@ #include <linux/init.h> #include <linux/list.h> #include <linux/io.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/pm_runtime.h> #include <linux/err.h> +#include <linux/delay.h> #include <linux/usb/musb-omap.h> #include "musb_core.h" @@ -44,6 +46,7 @@ struct omap2430_glue { struct platform_device *musb; enum omap_musb_vbus_id_status status; struct work_struct omap_musb_mailbox_work; + u32 __iomem *control_otghs; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) @@ -51,6 +54,26 @@ struct omap2430_glue *_glue; static struct timer_list musb_idle_timer; +/** + * omap4_usb_phy_mailbox - write to usb otg mailbox + * @glue: struct omap2430_glue * + * @val: the value to be written to the mailbox + * + * On detection of a device (ID pin is grounded), this API should be called + * to set AVALID, VBUSVALID and ID pin is grounded. + * + * When OMAP is connected to a host (OMAP in device mode), this API + * is called to set AVALID, VBUSVALID and ID pin in high impedance. + * + * XXX: This function will be removed once we have a seperate driver for + * control module + */ +static void omap4_usb_phy_mailbox(struct omap2430_glue *glue, u32 val) +{ + if (glue->control_otghs) + writel(val, glue->control_otghs); +} + static void musb_do_idle(unsigned long _musb) { struct musb *musb = (void *)_musb; @@ -140,7 +163,6 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on) struct usb_otg *otg = musb->xceiv->otg; 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. @@ -150,6 +172,7 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on) if (is_on) { if (musb->xceiv->state == OTG_STATE_A_IDLE) { + int loops = 100; /* start the session */ devctl |= MUSB_DEVCTL_SESSION; musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); @@ -159,17 +182,18 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on) */ while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { + mdelay(5); cpu_relax(); - if (time_after(jiffies, timeout)) { + if (time_after(jiffies, timeout) + || loops-- <= 0) { dev_err(musb->controller, "configured as A device timeout"); - ret = -EINVAL; break; } } - if (ret && otg->set_vbus) + if (otg->set_vbus) otg_set_vbus(otg, 1); } else { musb->is_active = 1; @@ -245,6 +269,7 @@ EXPORT_SYMBOL_GPL(omap_musb_mailbox); static void omap_musb_set_mailbox(struct omap2430_glue *glue) { + u32 val; struct musb *musb = glue_to_musb(glue); struct device *dev = musb->controller; struct musb_hdrc_platform_data *pdata = dev->platform_data; @@ -258,9 +283,10 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue) otg->default_a = true; musb->xceiv->state = OTG_STATE_A_IDLE; musb->xceiv->last_event = USB_EVENT_ID; - if (!is_otg_enabled(musb) || musb->gadget_driver) { + if (musb->gadget_driver) { pm_runtime_get_sync(dev); - usb_phy_init(musb->xceiv); + val = AVALID | VBUSVALID; + omap4_usb_phy_mailbox(glue, val); omap2430_musb_set_vbus(musb, 1); } break; @@ -273,7 +299,8 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue) musb->xceiv->last_event = USB_EVENT_VBUS; if (musb->gadget_driver) pm_runtime_get_sync(dev); - usb_phy_init(musb->xceiv); + val = IDDIG | AVALID | VBUSVALID; + omap4_usb_phy_mailbox(glue, val); break; case OMAP_MUSB_ID_FLOAT: @@ -281,17 +308,17 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue) dev_dbg(dev, "VBUS Disconnect\n"); musb->xceiv->last_event = USB_EVENT_NONE; - if (is_otg_enabled(musb) || is_peripheral_enabled(musb)) - if (musb->gadget_driver) { - pm_runtime_mark_last_busy(dev); - pm_runtime_put_autosuspend(dev); - } + if (musb->gadget_driver) { + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + } if (data->interface_type == MUSB_INTERFACE_UTMI) { if (musb->xceiv->otg->set_vbus) otg_set_vbus(musb->xceiv->otg, 0); } - usb_phy_shutdown(musb->xceiv); + val = SESSEND | IDDIG; + omap4_usb_phy_mailbox(glue, val); break; default: dev_dbg(dev, "ID float\n"); @@ -366,6 +393,7 @@ err1: static void omap2430_musb_enable(struct musb *musb) { u8 devctl; + u32 val; unsigned long timeout = jiffies + msecs_to_jiffies(1000); struct device *dev = musb->controller; struct omap2430_glue *glue = dev_get_drvdata(dev->parent); @@ -375,7 +403,8 @@ static void omap2430_musb_enable(struct musb *musb) switch (glue->status) { case OMAP_MUSB_ID_GROUND: - usb_phy_init(musb->xceiv); + val = AVALID | VBUSVALID; + omap4_usb_phy_mailbox(glue, val); if (data->interface_type != MUSB_INTERFACE_UTMI) break; devctl = musb_readb(musb->mregs, MUSB_DEVCTL); @@ -394,7 +423,8 @@ static void omap2430_musb_enable(struct musb *musb) break; case OMAP_MUSB_VBUS_VALID: - usb_phy_init(musb->xceiv); + val = IDDIG | AVALID | VBUSVALID; + omap4_usb_phy_mailbox(glue, val); break; default: @@ -404,11 +434,14 @@ static void omap2430_musb_enable(struct musb *musb) static void omap2430_musb_disable(struct musb *musb) { + u32 val; struct device *dev = musb->controller; struct omap2430_glue *glue = dev_get_drvdata(dev->parent); - if (glue->status != OMAP_MUSB_UNKNOWN) - usb_phy_shutdown(musb->xceiv); + if (glue->status != OMAP_MUSB_UNKNOWN) { + val = SESSEND | IDDIG; + omap4_usb_phy_mailbox(glue, val); + } } static int omap2430_musb_exit(struct musb *musb) @@ -438,9 +471,14 @@ static u64 omap2430_dmamask = DMA_BIT_MASK(32); static int __devinit omap2430_probe(struct platform_device *pdev) { struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; + struct omap_musb_board_data *data; struct platform_device *musb; struct omap2430_glue *glue; + struct device_node *np = pdev->dev.of_node; + struct musb_hdrc_config *config; + struct resource *res; int ret = -ENOMEM; + int musbid; glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -448,12 +486,21 @@ static int __devinit omap2430_probe(struct platform_device *pdev) goto err0; } - musb = platform_device_alloc("musb-hdrc", -1); + /* get the musb id */ + musbid = musb_get_id(&pdev->dev, GFP_KERNEL); + if (musbid < 0) { + dev_err(&pdev->dev, "failed to allocate musb id\n"); + ret = -ENOMEM; + goto err0; + } + + musb = platform_device_alloc("musb-hdrc", musbid); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err0; + goto err1; } + musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &omap2430_dmamask; musb->dev.coherent_dma_mask = omap2430_dmamask; @@ -462,6 +509,48 @@ static int __devinit omap2430_probe(struct platform_device *pdev) glue->musb = musb; glue->status = OMAP_MUSB_UNKNOWN; + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + + glue->control_otghs = devm_request_and_ioremap(&pdev->dev, res); + if (glue->control_otghs == NULL) + dev_dbg(&pdev->dev, "Failed to obtain control memory\n"); + + if (np) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, + "failed to allocate musb platfrom data\n"); + ret = -ENOMEM; + goto err1; + } + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, + "failed to allocate musb board data\n"); + ret = -ENOMEM; + goto err1; + } + + config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, + "failed to allocate musb hdrc config\n"); + goto err1; + } + + of_property_read_u32(np, "mode", (u32 *)&pdata->mode); + of_property_read_u32(np, "interface_type", + (u32 *)&data->interface_type); + of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps); + of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits); + of_property_read_u32(np, "power", (u32 *)&pdata->power); + config->multipoint = of_property_read_bool(np, "multipoint"); + + pdata->board_data = data; + pdata->config = config; + } + pdata->platform_ops = &omap2430_ops; platform_set_drvdata(pdev, glue); @@ -478,13 +567,13 @@ static int __devinit omap2430_probe(struct platform_device *pdev) pdev->num_resources); if (ret) { dev_err(&pdev->dev, "failed to add resources\n"); - goto err1; + goto err2; } ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "failed to add platform_data\n"); - goto err1; + goto err2; } pm_runtime_enable(&pdev->dev); @@ -492,14 +581,17 @@ static int __devinit omap2430_probe(struct platform_device *pdev) ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); - goto err1; + goto err2; } return 0; -err1: +err2: platform_device_put(musb); +err1: + musb_put_id(&pdev->dev, musbid); + err0: return ret; } @@ -509,8 +601,8 @@ static int __devexit omap2430_remove(struct platform_device *pdev) struct omap2430_glue *glue = platform_get_drvdata(pdev); cancel_work_sync(&glue->omap_musb_mailbox_work); - platform_device_del(glue->musb); - platform_device_put(glue->musb); + musb_put_id(&pdev->dev, glue->musb->id); + platform_device_unregister(glue->musb); return 0; } @@ -559,12 +651,26 @@ static struct dev_pm_ops omap2430_pm_ops = { #define DEV_PM_OPS NULL #endif +#ifdef CONFIG_OF +static const struct of_device_id omap2430_id_table[] = { + { + .compatible = "ti,omap4-musb" + }, + { + .compatible = "ti,omap3-musb" + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap2430_id_table); +#endif + static struct platform_driver omap2430_driver = { .probe = omap2430_probe, .remove = __devexit_p(omap2430_remove), .driver = { .name = "musb-omap2430", .pm = DEV_PM_OPS, + .of_match_table = of_match_ptr(omap2430_id_table), }, }; |