/* * Copyright (C) 2005-2007 by Texas Instruments * Some code has been taken from tusb6010.c * Copyrights for that are attributable to: * Copyright (C) 2006 Nokia Corporation * Tony Lindgren * * This file is part of the Inventra Controller Driver for Linux. * * The Inventra Controller Driver for Linux is free software; you * can redistribute it and/or modify it under the terms of the GNU * General Public License version 2 as published by the Free Software * Foundation. * * The Inventra Controller Driver for Linux 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 The Inventra Controller Driver for Linux ; if not, * write to the Free Software Foundation, Inc., 59 Temple Place, * Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include #include "musb_core.h" #include "omap2430.h" struct omap2430_glue { struct device *dev; struct platform_device *musb; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) static struct timer_list musb_idle_timer; static void musb_do_idle(unsigned long _musb) { struct musb *musb = (void *)_musb; unsigned long flags; u8 power; u8 devctl; spin_lock_irqsave(&musb->lock, flags); switch (musb->xceiv->state) { case OTG_STATE_A_WAIT_BCON: devctl = musb_readb(musb->mregs, MUSB_DEVCTL); if (devctl & MUSB_DEVCTL_BDEVICE) { musb->xceiv->state = OTG_STATE_B_IDLE; MUSB_DEV_MODE(musb); } else { musb->xceiv->state = OTG_STATE_A_IDLE; MUSB_HST_MODE(musb); } break; case OTG_STATE_A_SUSPEND: /* finish RESUME signaling? */ if (musb->port1_status & MUSB_PORT_STAT_RESUME) { power = musb_readb(musb->mregs, MUSB_POWER); power &= ~MUSB_POWER_RESUME; dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power); musb_writeb(musb->mregs, MUSB_POWER, power); musb->is_active = 1; musb->port1_status &= ~(USB_PORT_STAT_SUSPEND | MUSB_PORT_STAT_RESUME); musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; usb_hcd_poll_rh_status(musb_to_hcd(musb)); /* NOTE: it might really be A_WAIT_BCON ... */ musb->xceiv->state = OTG_STATE_A_HOST; } break; case OTG_STATE_A_HOST: devctl = musb_readb(musb->mregs, MUSB_DEVCTL); if (devctl & MUSB_DEVCTL_BDEVICE) musb->xceiv->state = OTG_STATE_B_IDLE; else musb->xceiv->state = OTG_STATE_A_WAIT_BCON; default: break; } spin_unlock_irqrestore(&musb->lock, flags); } 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; if (timeout == 0) timeout = default_timeout; /* Never idle if active, or when VBUS timeout is not set as host */ if (musb->is_active || ((musb->a_wait_bcon == 0) && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) { dev_dbg(musb->controller, "%s active, deleting timer\n", otg_state_string(musb->xceiv->state)); del_timer(&musb_idle_timer); last_timer = jiffies; return; } if (time_after(last_timer, timeout)) { if (!timer_pending(&musb_idle_timer)) last_timer = timeout; else { dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n"); return; } } last_timer = timeout; dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n", otg_state_string(musb->xceiv->state), (unsigned long)jiffies_to_msecs(timeout - jiffies)); mod_timer(&musb_idle_timer, timeout); } 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) { 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; /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and * jumping right to B_IDLE... */ musb->xceiv->default_a = 0; musb->xceiv->state = OTG_STATE_B_IDLE; devctl &= ~MUSB_DEVCTL_SESSION; MUSB_DEV_MODE(musb); } musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); dev_dbg(musb->controller, "VBUS %s, devctl %02x " /* otg %3x conf %08x prcm %08x */ "\n", otg_state_string(musb->xceiv->state), musb_readb(musb->mregs, MUSB_DEVCTL)); } static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) { u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); devctl |= MUSB_DEVCTL_SESSION; musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); return 0; } static inline void omap2430_low_level_exit(struct musb *musb) { u32 l; /* in any role */ l = musb_readl(musb->mregs, OTG_FORCESTDBY); l |= ENABLEFORCE; /* enable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); } static inline void omap2430_low_level_init(struct musb *musb) { u32 l; l = musb_readl(musb->mregs, OTG_FORCESTDBY); l &= ~ENABLEFORCE; /* disable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); } static int musb_otg_notifications(struct notifier_block *nb, unsigned long event, void *unused) { struct musb *musb = container_of(nb, struct musb, nb); musb->xceiv_event = event; schedule_work(&musb->otg_notifier_work); return NOTIFY_OK; } static void musb_otg_notifier_work(struct work_struct *data_notifier_work) { struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work); struct device *dev = musb->controller; struct musb_hdrc_platform_data *pdata = dev->platform_data; struct omap_musb_board_data *data = pdata->board_data; switch (musb->xceiv_event) { case USB_EVENT_ID: dev_dbg(musb->controller, "ID GND\n"); if (!is_otg_enabled(musb) || musb->gadget_driver) { pm_runtime_get_sync(musb->controller); otg_init(musb->xceiv); omap2430_musb_set_vbus(musb, 1); } break; case USB_EVENT_VBUS: dev_dbg(musb->controller, "VBUS Connect\n"); if (musb->gadget_driver) pm_runtime_get_sync(musb->controller); otg_init(musb->xceiv); break; case USB_EVENT_NONE: dev_dbg(musb->controller, "VBUS Disconnect\n"); if (is_otg_enabled(musb) || is_peripheral_enabled(musb)) if (musb->gadget_driver) { pm_runtime_mark_last_busy(musb->controller); pm_runtime_put_autosuspend(musb->controller); } if (data->interface_type == MUSB_INTERFACE_UTMI) { if (musb->xceiv->set_vbus) otg_set_vbus(musb->xceiv, 0); } otg_shutdown(musb->xceiv); break; default: dev_dbg(musb->controller, "ID float\n"); } } 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, * which needs a driver, drivers aren't always needed. */ musb->xceiv = otg_get_transceiver(); if (!musb->xceiv) { pr_err("HS USB OTG: no transceiver configured\n"); return -ENODEV; } INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work); status = pm_runtime_get_sync(dev); if (status < 0) { dev_err(dev, "pm_runtime_get_sync FAILED"); goto err1; } l = musb_readl(musb->mregs, OTG_INTERFSEL); if (data->interface_type == MUSB_INTERFACE_UTMI) { /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ l &= ~ULPI_12PIN; /* Disable ULPI */ l |= UTMI_8BIT; /* Enable UTMI */ } else { l |= ULPI_12PIN; } musb_writel(musb->mregs, OTG_INTERFSEL, l); pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", musb_readl(musb->mregs, OTG_REVISION), musb_readl(musb->mregs, OTG_SYSCONFIG), musb_readl(musb->mregs, OTG_SYSSTATUS), musb_readl(musb->mregs, OTG_INTERFSEL), musb_readl(musb->mregs, OTG_SIMENABLE)); musb->nb.notifier_call = musb_otg_notifications; status = otg_register_notifier(musb->xceiv, &musb->nb); if (status) dev_dbg(musb->controller, "notification register failed\n"); setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); return 0; err1: return status; } static void omap2430_musb_enable(struct musb *musb) { u8 devctl; unsigned long timeout = jiffies + msecs_to_jiffies(1000); struct device *dev = musb->controller; struct musb_hdrc_platform_data *pdata = dev->platform_data; struct omap_musb_board_data *data = pdata->board_data; switch (musb->xceiv->last_event) { case USB_EVENT_ID: otg_init(musb->xceiv); if (data->interface_type != MUSB_INTERFACE_UTMI) break; devctl = musb_readb(musb->mregs, MUSB_DEVCTL); /* start the session */ devctl |= MUSB_DEVCTL_SESSION; musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); while (musb_readb(musb->mregs, MUSB_DEVCTL) & MUSB_DEVCTL_BDEVICE) { cpu_relax(); if (time_after(jiffies, timeout)) { dev_err(dev, "configured as A device timeout"); break; } } break; case USB_EVENT_VBUS: otg_init(musb->xceiv); break; default: break; } } static void omap2430_musb_disable(struct musb *musb) { if (musb->xceiv->last_event) otg_shutdown(musb->xceiv); } static int omap2430_musb_exit(struct musb *musb) { del_timer_sync(&musb_idle_timer); cancel_work_sync(&musb->otg_notifier_work); omap2430_low_level_exit(musb); otg_put_transceiver(musb->xceiv); return 0; } 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, .enable = omap2430_musb_enable, .disable = omap2430_musb_disable, }; 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 platform_device *musb; struct omap2430_glue *glue; int ret = -ENOMEM; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { dev_err(&pdev->dev, "failed to allocate glue context\n"); goto err0; } musb = platform_device_alloc("musb-hdrc", -1); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); goto err1; } 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; 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 err2; } ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "failed to add platform_data\n"); goto err2; } ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); goto err2; } pm_runtime_enable(&pdev->dev); return 0; err2: platform_device_put(musb); err1: kfree(glue); err0: return ret; } static int __devexit omap2430_remove(struct platform_device *pdev) { struct omap2430_glue *glue = platform_get_drvdata(pdev); platform_device_del(glue->musb); platform_device_put(glue->musb); pm_runtime_put(&pdev->dev); kfree(glue); return 0; } #ifdef CONFIG_PM static int omap2430_runtime_suspend(struct device *dev) { struct omap2430_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); musb->context.otg_interfsel = musb_readl(musb->mregs, OTG_INTERFSEL); omap2430_low_level_exit(musb); otg_set_suspend(musb->xceiv, 1); return 0; } static int omap2430_runtime_resume(struct device *dev) { struct omap2430_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); omap2430_low_level_init(musb); musb_writel(musb->mregs, OTG_INTERFSEL, musb->context.otg_interfsel); otg_set_suspend(musb->xceiv, 0); return 0; } static struct dev_pm_ops omap2430_pm_ops = { .runtime_suspend = omap2430_runtime_suspend, .runtime_resume = omap2430_runtime_resume, }; #define DEV_PM_OPS (&omap2430_pm_ops) #else #define DEV_PM_OPS NULL #endif static struct platform_driver omap2430_driver = { .probe = omap2430_probe, .remove = __devexit_p(omap2430_remove), .driver = { .name = "musb-omap2430", .pm = DEV_PM_OPS, }, }; MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); MODULE_AUTHOR("Felipe Balbi "); MODULE_LICENSE("GPL v2"); static int __init omap2430_init(void) { return platform_driver_register(&omap2430_driver); } module_init(omap2430_init); static void __exit omap2430_exit(void) { platform_driver_unregister(&omap2430_driver); } module_exit(omap2430_exit);