/* * Renesas USB driver * * Copyright (C) 2011 Renesas Solutions Corp. * Kuninori Morimoto * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include #include #include #include #include "./common.h" /* * image of renesas_usbhs * * ex) gadget case * mod.c * mod_gadget.c * mod_host.c pipe.c fifo.c * * +-------+ +-----------+ * | pipe0 |------>| fifo pio | * +------------+ +-------+ +-----------+ * | mod_gadget |=====> | pipe1 |--+ * +------------+ +-------+ | +-----------+ * | pipe2 | | +-| fifo dma0 | * +------------+ +-------+ | | +-----------+ * | mod_host | | pipe3 |<-|--+ * +------------+ +-------+ | +-----------+ * | .... | +--->| fifo dma1 | * | .... | +-----------+ */ #define USBHSF_RUNTIME_PWCTRL (1 << 0) /* status */ #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0) #define usbhsc_flags_set(p, b) ((p)->flags |= (b)) #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b)) #define usbhsc_flags_has(p, b) ((p)->flags & (b)) /* * platform call back * * renesas usb support platform callback function. * Below macro call it. * if platform doesn't have callback, it return 0 (no error) */ #define usbhs_platform_call(priv, func, args...)\ (!(priv) ? -ENODEV : \ !((priv)->pfunc->func) ? 0 : \ (priv)->pfunc->func(args)) /* * common functions */ u16 usbhs_read(struct usbhs_priv *priv, u32 reg) { return ioread16(priv->base + reg); } void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) { iowrite16(data, priv->base + reg); } void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) { u16 val = usbhs_read(priv, reg); val &= ~mask; val |= data & mask; usbhs_write(priv, reg, val); } struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) { return dev_get_drvdata(&pdev->dev); } /* * syscfg functions */ void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) { usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); } void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable) { usbhs_bset(priv, SYSCFG, HSE, enable ? HSE : 0); } void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable) { usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0); } void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) { u16 mask = DCFM | DRPD | DPRPU; u16 val = DCFM | DRPD; /* * if enable * * - select Host mode * - D+ Line/D- Line Pull-down */ usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); } void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) { u16 mask = DCFM | DRPD | DPRPU; u16 val = DPRPU; /* * if enable * * - select Function mode * - D+ Line Pull-up */ usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); } /* * frame functions */ int usbhs_frame_get_num(struct usbhs_priv *priv) { return usbhs_read(priv, FRMNUM) & FRNM_MASK; } /* * bus/vbus functions */ void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) { usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); } void usbhs_bus_send_reset(struct usbhs_priv *priv) { usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); } int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) { struct platform_device *pdev = usbhs_priv_to_pdev(priv); return usbhs_platform_call(priv, set_vbus, pdev, enable); } static void usbhsc_bus_init(struct usbhs_priv *priv) { usbhs_write(priv, DVSTCTR, 0); usbhs_vbus_ctrl(priv, 0); } /* * local functions */ static void usbhsc_set_buswait(struct usbhs_priv *priv) { int wait = usbhs_get_dparam(priv, buswait_bwait); /* set bus wait if platform have */ if (wait) usbhs_bset(priv, BUSWAIT, 0x000F, wait); } /* * platform default param */ static u32 usbhsc_default_pipe_type[] = { USB_ENDPOINT_XFER_CONTROL, USB_ENDPOINT_XFER_ISOC, USB_ENDPOINT_XFER_ISOC, USB_ENDPOINT_XFER_BULK, USB_ENDPOINT_XFER_BULK, USB_ENDPOINT_XFER_BULK, USB_ENDPOINT_XFER_INT, USB_ENDPOINT_XFER_INT, USB_ENDPOINT_XFER_INT, USB_ENDPOINT_XFER_INT, }; /* * power control */ static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) { struct device *dev = usbhs_priv_to_dev(priv); if (enable) { /* enable PM */ pm_runtime_get_sync(dev); /* USB on */ usbhs_sys_clock_ctrl(priv, enable); } else { /* USB off */ usbhs_sys_clock_ctrl(priv, enable); /* disable PM */ pm_runtime_put_sync(dev); } } /* * hotplug */ static void usbhsc_hotplug(struct usbhs_priv *priv) { struct platform_device *pdev = usbhs_priv_to_pdev(priv); struct usbhs_mod *mod = usbhs_mod_get_current(priv); int id; int enable; int ret; /* * get vbus status from platform */ enable = usbhs_platform_call(priv, get_vbus, pdev); /* * get id from platform */ id = usbhs_platform_call(priv, get_id, pdev); if (enable && !mod) { ret = usbhs_mod_change(priv, id); if (ret < 0) return; dev_dbg(&pdev->dev, "%s enable\n", __func__); /* power on */ if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) usbhsc_power_ctrl(priv, enable); /* bus init */ usbhsc_set_buswait(priv); usbhsc_bus_init(priv); /* module start */ usbhs_mod_call(priv, start, priv); } else if (!enable && mod) { dev_dbg(&pdev->dev, "%s disable\n", __func__); /* module stop */ usbhs_mod_call(priv, stop, priv); /* bus init */ usbhsc_bus_init(priv); /* power off */ if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) usbhsc_power_ctrl(priv, enable); usbhs_mod_change(priv, -1); /* reset phy for next connection */ usbhs_platform_call(priv, phy_reset, pdev); } } /* * notify hotplug */ static void usbhsc_notify_hotplug(struct work_struct *work) { struct usbhs_priv *priv = container_of(work, struct usbhs_priv, notify_hotplug_work.work); usbhsc_hotplug(priv); } int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev) { struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); int delay = usbhs_get_dparam(priv, detection_delay); /* * This functions will be called in interrupt. * To make sure safety context, * use workqueue for usbhs_notify_hotplug */ schedule_delayed_work(&priv->notify_hotplug_work, delay); return 0; } /* * platform functions */ static int __devinit usbhs_probe(struct platform_device *pdev) { struct renesas_usbhs_platform_info *info = pdev->dev.platform_data; struct renesas_usbhs_driver_callback *dfunc; struct usbhs_priv *priv; struct resource *res; unsigned int irq; int ret; /* check platform information */ if (!info || !info->platform_callback.get_id) { dev_err(&pdev->dev, "no platform information\n"); return -EINVAL; } /* platform data */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); if (!res || (int)irq <= 0) { dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n"); return -ENODEV; } /* usb private data */ priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(&pdev->dev, "Could not allocate priv\n"); return -ENOMEM; } priv->base = ioremap_nocache(res->start, resource_size(res)); if (!priv->base) { dev_err(&pdev->dev, "ioremap error.\n"); ret = -ENOMEM; goto probe_end_kfree; } /* * care platform info */ priv->pfunc = &info->platform_callback; priv->dparam = &info->driver_param; /* set driver callback functions for platform */ dfunc = &info->driver_callback; dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug; /* set default param if platform doesn't have */ if (!priv->dparam->pipe_type) { priv->dparam->pipe_type = usbhsc_default_pipe_type; priv->dparam->pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type); } if (!priv->dparam->pio_dma_border) priv->dparam->pio_dma_border = 64; /* 64byte */ /* FIXME */ /* runtime power control ? */ if (priv->pfunc->get_vbus) usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL); /* * priv settings */ priv->irq = irq; priv->pdev = pdev; INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); spin_lock_init(usbhs_priv_to_lock(priv)); /* call pipe and module init */ ret = usbhs_pipe_probe(priv); if (ret < 0) goto probe_end_iounmap; ret = usbhs_fifo_probe(priv); if (ret < 0) goto probe_end_pipe_exit; ret = usbhs_mod_probe(priv); if (ret < 0) goto probe_end_fifo_exit; /* dev_set_drvdata should be called after usbhs_mod_init */ dev_set_drvdata(&pdev->dev, priv); /* * deviece reset here because * USB device might be used in boot loader. */ usbhs_sys_clock_ctrl(priv, 0); /* * platform call * * USB phy setup might depend on CPU/Board. * If platform has its callback functions, * call it here. */ ret = usbhs_platform_call(priv, hardware_init, pdev); if (ret < 0) { dev_err(&pdev->dev, "platform prove failed.\n"); goto probe_end_mod_exit; } /* reset phy for connection */ usbhs_platform_call(priv, phy_reset, pdev); /* power control */ pm_runtime_enable(&pdev->dev); if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) { usbhsc_power_ctrl(priv, 1); usbhs_mod_autonomy_mode(priv); } /* * manual call notify_hotplug for cold plug */ ret = usbhsc_drvcllbck_notify_hotplug(pdev); if (ret < 0) goto probe_end_call_remove; dev_info(&pdev->dev, "probed\n"); return ret; probe_end_call_remove: usbhs_platform_call(priv, hardware_exit, pdev); probe_end_mod_exit: usbhs_mod_remove(priv); probe_end_fifo_exit: usbhs_fifo_remove(priv); probe_end_pipe_exit: usbhs_pipe_remove(priv); probe_end_iounmap: iounmap(priv->base); probe_end_kfree: kfree(priv); dev_info(&pdev->dev, "probe failed\n"); return ret; } static int __devexit usbhs_remove(struct platform_device *pdev) { struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); struct renesas_usbhs_platform_info *info = pdev->dev.platform_data; struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback; dev_dbg(&pdev->dev, "usb remove\n"); dfunc->notify_hotplug = NULL; /* power off */ if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) usbhsc_power_ctrl(priv, 0); pm_runtime_disable(&pdev->dev); usbhs_platform_call(priv, hardware_exit, pdev); usbhs_mod_remove(priv); usbhs_fifo_remove(priv); usbhs_pipe_remove(priv); iounmap(priv->base); kfree(priv); return 0; } static int usbhsc_suspend(struct device *dev) { struct usbhs_priv *priv = dev_get_drvdata(dev); struct usbhs_mod *mod = usbhs_mod_get_current(priv); if (mod) { usbhs_mod_call(priv, stop, priv); usbhs_mod_change(priv, -1); } if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) usbhsc_power_ctrl(priv, 0); return 0; } static int usbhsc_resume(struct device *dev) { struct usbhs_priv *priv = dev_get_drvdata(dev); struct platform_device *pdev = usbhs_priv_to_pdev(priv); usbhs_platform_call(priv, phy_reset, pdev); if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) usbhsc_power_ctrl(priv, 1); usbhsc_hotplug(priv); return 0; } static int usbhsc_runtime_nop(struct device *dev) { /* Runtime PM callback shared between ->runtime_suspend() * and ->runtime_resume(). Simply returns success. * * This driver re-initializes all registers after * pm_runtime_get_sync() anyway so there is no need * to save and restore registers here. */ return 0; } static const struct dev_pm_ops usbhsc_pm_ops = { .suspend = usbhsc_suspend, .resume = usbhsc_resume, .runtime_suspend = usbhsc_runtime_nop, .runtime_resume = usbhsc_runtime_nop, }; static struct platform_driver renesas_usbhs_driver = { .driver = { .name = "renesas_usbhs", .pm = &usbhsc_pm_ops, }, .probe = usbhs_probe, .remove = __devexit_p(usbhs_remove), }; static int __init usbhs_init(void) { return platform_driver_register(&renesas_usbhs_driver); } static void __exit usbhs_exit(void) { platform_driver_unregister(&renesas_usbhs_driver); } module_init(usbhs_init); module_exit(usbhs_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Renesas USB driver"); MODULE_AUTHOR("Kuninori Morimoto ");