// SPDX-License-Identifier: GPL-2.0 /* * 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. */ #include #include #include #include #include #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; enum musb_vbus_id_status status; struct work_struct omap_musb_mailbox_work; struct device *control_otghs; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) static struct omap2430_glue *_glue; 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); /* 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->otg->state == OTG_STATE_A_IDLE) { int loops = 100; /* 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) & MUSB_DEVCTL_BDEVICE) { mdelay(5); cpu_relax(); if (time_after(jiffies, timeout) || loops-- <= 0) { dev_err(musb->controller, "configured as A device timeout"); break; } } otg_set_vbus(otg, 1); } else { musb->is_active = 1; musb->xceiv->otg->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->otg->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", usb_otg_state_string(musb->xceiv->otg->state), musb_readb(musb->mregs, MUSB_DEVCTL)); } 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 omap2430_musb_mailbox(enum musb_vbus_id_status status) { struct omap2430_glue *glue = _glue; if (!glue) { pr_err("%s: musb core is not yet initialized\n", __func__); return -EPROBE_DEFER; } glue->status = status; if (!glue_to_musb(glue)) { pr_err("%s: musb core is not yet ready\n", __func__); return -EPROBE_DEFER; } schedule_work(&glue->omap_musb_mailbox_work); return 0; } static void omap_musb_set_mailbox(struct omap2430_glue *glue) { struct musb *musb = glue_to_musb(glue); struct musb_hdrc_platform_data *pdata = dev_get_platdata(musb->controller); struct omap_musb_board_data *data = pdata->board_data; pm_runtime_get_sync(musb->controller); switch (glue->status) { case MUSB_ID_GROUND: dev_dbg(musb->controller, "ID GND\n"); musb->xceiv->otg->state = OTG_STATE_A_IDLE; musb->xceiv->last_event = USB_EVENT_ID; if (musb->gadget_driver) { omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST); omap2430_musb_set_vbus(musb, 1); } break; case MUSB_VBUS_VALID: dev_dbg(musb->controller, "VBUS Connect\n"); musb->xceiv->otg->state = OTG_STATE_B_IDLE; musb->xceiv->last_event = USB_EVENT_VBUS; omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); break; case MUSB_ID_FLOAT: case MUSB_VBUS_OFF: dev_dbg(musb->controller, "VBUS Disconnect\n"); musb->xceiv->last_event = USB_EVENT_NONE; if (musb->gadget_driver) omap2430_musb_set_vbus(musb, 0); if (data->interface_type == MUSB_INTERFACE_UTMI) otg_set_vbus(musb->xceiv->otg, 0); omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DISCONNECT); break; default: dev_dbg(musb->controller, "ID float\n"); } pm_runtime_mark_last_busy(musb->controller); pm_runtime_put_autosuspend(musb->controller); atomic_notifier_call_chain(&musb->xceiv->notifier, musb->xceiv->last_event, NULL); } 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); } static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci) { unsigned long flags; irqreturn_t retval = IRQ_NONE; struct musb *musb = __hci; spin_lock_irqsave(&musb->lock, flags); musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); if (musb->int_usb || musb->int_tx || musb->int_rx) retval = musb_interrupt(musb); spin_unlock_irqrestore(&musb->lock, flags); return retval; } static int omap2430_musb_init(struct musb *musb) { u32 l; int status = 0; struct device *dev = musb->controller; struct omap2430_glue *glue = dev_get_drvdata(dev->parent); struct musb_hdrc_platform_data *plat = dev_get_platdata(dev); 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->phy = devm_phy_get(dev->parent, "usb2-phy"); /* We can't totally remove musb->xceiv as of now because * musb core uses xceiv.state and xceiv.otg. Once we have * a separate state machine to handle otg, these can be moved * out of xceiv and then we can start using the generic PHY * framework */ musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0); if (IS_ERR(musb->xceiv)) { status = PTR_ERR(musb->xceiv); if (status == -ENXIO) return status; dev_dbg(dev, "HS USB OTG: no transceiver configured\n"); return -EPROBE_DEFER; } if (IS_ERR(musb->phy)) { dev_err(dev, "HS USB OTG: no PHY configured\n"); return PTR_ERR(musb->phy); } musb->isr = omap2430_musb_interrupt; phy_init(musb->phy); phy_power_on(musb->phy); 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); dev_dbg(dev, "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)); if (glue->status != MUSB_UNKNOWN) omap_musb_set_mailbox(glue); return 0; } static void omap2430_musb_enable(struct musb *musb) { 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_get_platdata(dev); struct omap_musb_board_data *data = pdata->board_data; switch (glue->status) { case MUSB_ID_GROUND: omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST); 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 MUSB_VBUS_VALID: omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); break; default: break; } } static void omap2430_musb_disable(struct musb *musb) { struct device *dev = musb->controller; struct omap2430_glue *glue = dev_get_drvdata(dev->parent); if (glue->status != MUSB_UNKNOWN) omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DISCONNECT); } static int omap2430_musb_exit(struct musb *musb) { struct device *dev = musb->controller; struct omap2430_glue *glue = dev_get_drvdata(dev->parent); omap2430_low_level_exit(musb); phy_power_off(musb->phy); phy_exit(musb->phy); musb->phy = NULL; cancel_work_sync(&glue->omap_musb_mailbox_work); return 0; } static const struct musb_platform_ops omap2430_ops = { .quirks = MUSB_DMA_INVENTRA, #ifdef CONFIG_USB_INVENTRA_DMA .dma_init = musbhs_dma_controller_create, .dma_exit = musbhs_dma_controller_destroy, #endif .init = omap2430_musb_init, .exit = omap2430_musb_exit, .enable = omap2430_musb_enable, .disable = omap2430_musb_disable, .phy_callback = omap2430_musb_mailbox, }; static u64 omap2430_dmamask = DMA_BIT_MASK(32); static int omap2430_probe(struct platform_device *pdev) { struct resource musb_resources[3]; struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev); 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 device_node *control_node; struct platform_device *control_pdev; int ret = -ENOMEM, val; if (!np) return -ENODEV; glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); if (!glue) goto err0; musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 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 = MUSB_UNKNOWN; glue->control_otghs = ERR_PTR(-ENODEV); pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) goto err2; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) goto err2; config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); if (!config) goto err2; 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); ret = of_property_read_u32(np, "multipoint", &val); if (!ret && val) config->multipoint = true; pdata->board_data = data; pdata->config = config; control_node = of_parse_phandle(np, "ctrl-module", 0); if (control_node) { control_pdev = of_find_device_by_node(control_node); of_node_put(control_node); if (!control_pdev) { dev_err(&pdev->dev, "Failed to get control device\n"); ret = -EINVAL; goto err2; } glue->control_otghs = &control_pdev->dev; } 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); memset(musb_resources, 0x00, sizeof(*musb_resources) * ARRAY_SIZE(musb_resources)); musb_resources[0].name = pdev->resource[0].name; musb_resources[0].start = pdev->resource[0].start; musb_resources[0].end = pdev->resource[0].end; musb_resources[0].flags = pdev->resource[0].flags; musb_resources[1].name = pdev->resource[1].name; musb_resources[1].start = pdev->resource[1].start; musb_resources[1].end = pdev->resource[1].end; musb_resources[1].flags = pdev->resource[1].flags; musb_resources[2].name = pdev->resource[2].name; musb_resources[2].start = pdev->resource[2].start; musb_resources[2].end = pdev->resource[2].end; musb_resources[2].flags = pdev->resource[2].flags; ret = platform_device_add_resources(musb, musb_resources, ARRAY_SIZE(musb_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; } pm_runtime_enable(glue->dev); ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); goto err3; } return 0; err3: pm_runtime_disable(glue->dev); err2: platform_device_put(musb); err0: return ret; } static int omap2430_remove(struct platform_device *pdev) { struct omap2430_glue *glue = platform_get_drvdata(pdev); platform_device_unregister(glue->musb); pm_runtime_disable(glue->dev); 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) return 0; musb->context.otg_interfsel = musb_readl(musb->mregs, OTG_INTERFSEL); omap2430_low_level_exit(musb); phy_power_off(musb->phy); phy_exit(musb->phy); 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) return 0; phy_init(musb->phy); phy_power_on(musb->phy); omap2430_low_level_init(musb); musb_writel(musb->mregs, OTG_INTERFSEL, musb->context.otg_interfsel); return 0; } static const 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 #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 = omap2430_remove, .driver = { .name = "musb-omap2430", .pm = DEV_PM_OPS, .of_match_table = of_match_ptr(omap2430_id_table), }, }; module_platform_driver(omap2430_driver); MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); MODULE_AUTHOR("Felipe Balbi "); MODULE_LICENSE("GPL v2");