diff options
Diffstat (limited to 'drivers/usb/musb-new/omap2430.c')
| -rw-r--r-- | drivers/usb/musb-new/omap2430.c | 626 |
1 files changed, 626 insertions, 0 deletions
diff --git a/drivers/usb/musb-new/omap2430.c b/drivers/usb/musb-new/omap2430.c new file mode 100644 index 000000000..b1c4dc782 --- /dev/null +++ b/drivers/usb/musb-new/omap2430.c @@ -0,0 +1,626 @@ +/* + * 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 <tony@atomide.com> + * + * 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 + * + */ +#define __UBOOT__ +#ifndef __UBOOT__ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/pm_runtime.h> +#include <linux/err.h> +#include <linux/usb/musb-omap.h> +#else +#include <common.h> +#include <asm/omap_musb.h> +#include <twl4030.h> +#include "linux-compat.h" +#endif + +#include "musb_core.h" +#include "omap2430.h" + +#ifndef __UBOOT__ +struct omap2430_glue { + struct device *dev; + struct platform_device *musb; + enum omap_musb_vbus_id_status status; + struct work_struct omap_musb_mailbox_work; +}; +#define glue_to_musb(g) platform_get_drvdata(g->musb) + +struct omap2430_glue *_glue; + +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) +{ + 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. + */ + + 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 && otg->set_vbus) + otg_set_vbus(otg, 1); + } else { + musb->is_active = 1; + otg->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... + */ + + otg->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; +} +#endif + +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); +} + +#ifndef __UBOOT__ +void omap_musb_mailbox(enum omap_musb_vbus_id_status status) +{ + struct omap2430_glue *glue = _glue; + struct musb *musb = glue_to_musb(glue); + + glue->status = status; + if (!musb) { + dev_err(glue->dev, "musb core is not yet ready\n"); + return; + } + + schedule_work(&glue->omap_musb_mailbox_work); +} +EXPORT_SYMBOL_GPL(omap_musb_mailbox); + +static void omap_musb_set_mailbox(struct omap2430_glue *glue) +{ + struct musb *musb = glue_to_musb(glue); + struct device *dev = musb->controller; + struct musb_hdrc_platform_data *pdata = dev->platform_data; + struct omap_musb_board_data *data = pdata->board_data; + struct usb_otg *otg = musb->xceiv->otg; + + switch (glue->status) { + case OMAP_MUSB_ID_GROUND: + dev_dbg(dev, "ID GND\n"); + + 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) { + pm_runtime_get_sync(dev); + usb_phy_init(musb->xceiv); + omap2430_musb_set_vbus(musb, 1); + } + break; + + case OMAP_MUSB_VBUS_VALID: + dev_dbg(dev, "VBUS Connect\n"); + + otg->default_a = false; + musb->xceiv->state = OTG_STATE_B_IDLE; + musb->xceiv->last_event = USB_EVENT_VBUS; + if (musb->gadget_driver) + pm_runtime_get_sync(dev); + usb_phy_init(musb->xceiv); + break; + + case OMAP_MUSB_ID_FLOAT: + case OMAP_MUSB_VBUS_OFF: + 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 (data->interface_type == MUSB_INTERFACE_UTMI) { + if (musb->xceiv->otg->set_vbus) + otg_set_vbus(musb->xceiv->otg, 0); + } + usb_phy_shutdown(musb->xceiv); + break; + default: + dev_dbg(dev, "ID float\n"); + } +} + + +static void omap_musb_mailbox_work(struct work_struct *mailbox_work) +{ + struct omap2430_glue *glue = container_of(mailbox_work, + struct omap2430_glue, omap_musb_mailbox_work); + omap_musb_set_mailbox(glue); +} +#endif + +static int omap2430_musb_init(struct musb *musb) +{ + u32 l; + int status = 0; +#ifndef __UBOOT__ + struct device *dev = musb->controller; + struct omap2430_glue *glue = dev_get_drvdata(dev->parent); + struct musb_hdrc_platform_data *plat = dev->platform_data; + struct omap_musb_board_data *data = plat->board_data; +#else + struct omap_musb_board_data *data = + (struct omap_musb_board_data *)musb->controller; +#endif + + +#ifndef __UBOOT__ + /* 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 = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); + if (IS_ERR_OR_NULL(musb->xceiv)) { + pr_err("HS USB OTG: no transceiver configured\n"); + return -ENODEV; + } + + status = pm_runtime_get_sync(dev); + if (status < 0) { + dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status); + goto err1; + } +#endif + + 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)); + +#ifndef __UBOOT__ + setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); + + if (glue->status != OMAP_MUSB_UNKNOWN) + omap_musb_set_mailbox(glue); + + pm_runtime_put_noidle(musb->controller); +#endif + return 0; + +err1: + return status; +} + +static void omap2430_musb_enable(struct musb *musb) +{ +#ifndef __UBOOT__ + u8 devctl; + unsigned long timeout = jiffies + msecs_to_jiffies(1000); + struct device *dev = musb->controller; + struct omap2430_glue *glue = dev_get_drvdata(dev->parent); + struct musb_hdrc_platform_data *pdata = dev->platform_data; + struct omap_musb_board_data *data = pdata->board_data; + + switch (glue->status) { + + case OMAP_MUSB_ID_GROUND: + usb_phy_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 OMAP_MUSB_VBUS_VALID: + usb_phy_init(musb->xceiv); + break; + + default: + break; + } +#else +#ifdef CONFIG_TWL4030_USB + if (twl4030_usb_ulpi_init()) { + serial_printf("ERROR: %s Could not initialize PHY\n", + __PRETTY_FUNCTION__); + } +#endif +#endif +} + +static void omap2430_musb_disable(struct musb *musb) +{ +#ifndef __UBOOT__ + 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); +#endif +} + +static int omap2430_musb_exit(struct musb *musb) +{ + del_timer_sync(&musb_idle_timer); + + omap2430_low_level_exit(musb); + + return 0; +} + +#ifndef __UBOOT__ +static const struct musb_platform_ops omap2430_ops = { +#else +const struct musb_platform_ops omap2430_ops = { +#endif + .init = omap2430_musb_init, + .exit = omap2430_musb_exit, + +#ifndef __UBOOT__ + .set_mode = omap2430_musb_set_mode, + .try_idle = omap2430_musb_try_idle, + + .set_vbus = omap2430_musb_set_vbus, +#endif + + .enable = omap2430_musb_enable, + .disable = omap2430_musb_disable, +}; + +#ifndef __UBOOT__ +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 = devm_kzalloc(&pdev->dev, 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 err0; + } + + 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->status = OMAP_MUSB_UNKNOWN; + + pdata->platform_ops = &omap2430_ops; + + platform_set_drvdata(pdev, glue); + + /* + * REVISIT if we ever have two instances of the wrapper, we will be + * in big trouble + */ + _glue = glue; + + INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work); + + ret = platform_device_add_resources(musb, pdev->resource, + pdev->num_resources); + if (ret) { + dev_err(&pdev->dev, "failed to add resources\n"); + goto err1; + } + + ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); + if (ret) { + dev_err(&pdev->dev, "failed to add platform_data\n"); + goto err1; + } + + pm_runtime_enable(&pdev->dev); + + ret = platform_device_add(musb); + if (ret) { + dev_err(&pdev->dev, "failed to register musb device\n"); + goto err1; + } + + return 0; + +err1: + platform_device_put(musb); + +err0: + return ret; +} + +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); + + 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); + + if (musb) { + musb->context.otg_interfsel = musb_readl(musb->mregs, + OTG_INTERFSEL); + + omap2430_low_level_exit(musb); + usb_phy_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); + + if (musb) { + omap2430_low_level_init(musb); + musb_writel(musb->mregs, OTG_INTERFSEL, + musb->context.otg_interfsel); + + usb_phy_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 <balbi@ti.com>"); +MODULE_LICENSE("GPL v2"); + +static int __init omap2430_init(void) +{ + return platform_driver_register(&omap2430_driver); +} +subsys_initcall(omap2430_init); + +static void __exit omap2430_exit(void) +{ + platform_driver_unregister(&omap2430_driver); +} +module_exit(omap2430_exit); +#endif |