/* * drivers/usb/gadget/s3c_udc_otg.c * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers * * Copyright (C) 2008 for Samsung Electronics * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include "s3c_udc.h" #include #include #include #include #include #include #include #include #include #include #include #include #if defined(CONFIG_USB_GADGET_S3C_OTGD_DMA_MODE) /* DMA mode */ #define OTG_DMA_MODE 1 #elif defined(CONFIG_USB_GADGET_S3C_OTGD_SLAVE_MODE) /* Slave mode */ #define OTG_DMA_MODE 0 #error " Slave Mode is not implemented to do later" #else #error " Unknown S3C OTG operation mode, Select a correct operation mode" #endif #define DEBUG_S3C_UDC_SETUP #undef DEBUG_S3C_UDC_EP0 #define DEBUG_S3C_UDC_ISR #undef DEBUG_S3C_UDC_OUT_EP #undef DEBUG_S3C_UDC_IN_EP #undef DEBUG_S3C_UDC #define EP0_CON 0 #define EP1_OUT 1 #define EP2_IN 2 #define EP3_IN 3 #define EP_MASK 0xF #if defined(DEBUG_S3C_UDC_SETUP) || defined(DEBUG_S3C_UDC_ISR)\ || defined(DEBUG_S3C_UDC_OUT_EP) static char *state_names[] = { "WAIT_FOR_SETUP", "DATA_STATE_XMIT", "DATA_STATE_NEED_ZLP", "WAIT_FOR_OUT_STATUS", "DATA_STATE_RECV", }; #endif #ifdef DEBUG_S3C_UDC_SETUP #define DEBUG_SETUP(fmt, args...) pr_debug(fmt, ##args) #else #define DEBUG_SETUP(fmt, args...) do {} while (0) #endif #ifdef DEBUG_S3C_UDC_EP0 #define DEBUG_EP0(fmt, args...) printk(fmt, ##args) #else #define DEBUG_EP0(fmt, args...) do {} while (0) #endif #ifdef DEBUG_S3C_UDC #define DEBUG(fmt, args...) printk(fmt, ##args) #else #define DEBUG(fmt, args...) do {} while (0) #endif #ifdef DEBUG_S3C_UDC_ISR #define DEBUG_ISR(fmt, args...) pr_debug(fmt, ##args) #else #define DEBUG_ISR(fmt, args...) do {} while (0) #endif #ifdef DEBUG_S3C_UDC_OUT_EP #define DEBUG_OUT_EP(fmt, args...) printk(fmt, ##args) #else #define DEBUG_OUT_EP(fmt, args...) do {} while (0) #endif #ifdef DEBUG_S3C_UDC_IN_EP #define DEBUG_IN_EP(fmt, args...) printk(fmt, ##args) #else #define DEBUG_IN_EP(fmt, args...) do {} while (0) #endif #define DRIVER_DESC "S3C HS USB Device Controller Driver, (c) 2008-2009 Samsung Electronics" #define DRIVER_VERSION "15 March 2009" struct s3c_udc *the_controller; static struct clk *otg_clock; static const char driver_name[] = "s3c-udc"; static const char driver_desc[] = DRIVER_DESC; static const char ep0name[] = "ep0-control"; /* Max packet size*/ static unsigned int ep0_fifo_size = 64; static unsigned int ep_fifo_size = 512; static unsigned int ep_fifo_size2 = 1024; static int reset_available = 1; /* Local declarations. */ static int s3c_ep_enable(struct usb_ep *ep, const struct usb_endpoint_descriptor *); static int s3c_ep_disable(struct usb_ep *ep); static struct usb_request *s3c_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); static void s3c_free_request(struct usb_ep *ep, struct usb_request *); static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags); static int s3c_dequeue(struct usb_ep *ep, struct usb_request *); static int s3c_fifo_status(struct usb_ep *ep); static void s3c_fifo_flush(struct usb_ep *ep); static void s3c_ep0_read(struct s3c_udc *dev); static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep); static void s3c_handle_ep0(struct s3c_udc *dev); static int s3c_ep0_write(struct s3c_udc *dev); static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req); static void done(struct s3c_ep *ep, struct s3c_request *req, int status); static void stop_activity(struct s3c_udc *dev, struct usb_gadget_driver *driver); static int udc_enable(struct s3c_udc *dev); static void udc_set_address(struct s3c_udc *dev, unsigned char address); static void reconfig_usbd(void); static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed); static void nuke(struct s3c_ep *ep, int status); static int s3c_udc_set_halt(struct usb_ep *_ep, int value); static struct usb_ep_ops s3c_ep_ops = { .enable = s3c_ep_enable, .disable = s3c_ep_disable, .alloc_request = s3c_alloc_request, .free_request = s3c_free_request, .queue = s3c_queue, .dequeue = s3c_dequeue, .set_halt = s3c_udc_set_halt, .fifo_status = s3c_fifo_status, .fifo_flush = s3c_fifo_flush, }; #ifdef CONFIG_USB_GADGET_DEBUG_FILES static const char proc_node_name[] = "driver/udc"; static int udc_proc_read(char *page, char **start, off_t off, int count, int *eof, void *_dev) { char *buf = page; struct s3c_udc *dev = _dev; char *next = buf; unsigned size = count; unsigned long flags; int t; if (off != 0) return 0; local_irq_save(flags); /* basic device status */ t = scnprintf(next, size, DRIVER_DESC "\n" "%s version: %s\n" "Gadget driver: %s\n" "\n", driver_name, DRIVER_VERSION, dev->driver ? dev->driver->driver.name : "(none)"); size -= t; next += t; local_irq_restore(flags); *eof = 1; return count - size; } #define create_proc_files() \ create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) #define remove_proc_files() \ remove_proc_entry(proc_node_name, NULL) #else /* !CONFIG_USB_GADGET_DEBUG_FILES */ #define create_proc_files() do {} while (0) #define remove_proc_files() do {} while (0) #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ #if OTG_DMA_MODE /* DMA Mode */ #include "s3c_udc_otg_xfer_dma.c" #else /* Slave Mode */ #include "s3c_udc_otg_xfer_slave.c" #endif /* * udc_disable - disable USB device controller */ static void udc_disable(struct s3c_udc *dev) { DEBUG_SETUP("%s: %p\n", __func__, dev); udc_set_address(dev, 0); dev->ep0state = WAIT_FOR_SETUP; dev->gadget.speed = USB_SPEED_UNKNOWN; dev->usb_address = 0; otg_phy_off(); } /* * udc_reinit - initialize software state */ static void udc_reinit(struct s3c_udc *dev) { unsigned int i; DEBUG_SETUP("%s: %p\n", __func__, dev); /* device/ep0 records init */ INIT_LIST_HEAD(&dev->gadget.ep_list); INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); dev->ep0state = WAIT_FOR_SETUP; /* basic endpoint records init */ for (i = 0; i < S3C_MAX_ENDPOINTS; i++) { struct s3c_ep *ep = &dev->ep[i]; if (i != 0) list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); ep->desc = 0; ep->stopped = 0; INIT_LIST_HEAD(&ep->queue); ep->pio_irqs = 0; } /* the rest was statically initialized, and is read-only */ } #define BYTES2MAXP(x) (x / 8) #define MAXP2BYTES(x) (x * 8) /* until it's enabled, this UDC should be completely invisible * to any USB host. */ static int udc_enable(struct s3c_udc *dev) { unsigned long flags; DEBUG_SETUP("%s: %p\n", __func__, dev); otg_phy_init(); spin_lock_irqsave(&dev->lock, flags); reconfig_usbd(); spin_unlock_irqrestore(&dev->lock, flags); DEBUG_SETUP("S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n", readl(S3C_UDC_OTG_GINTMSK)); dev->gadget.speed = USB_SPEED_UNKNOWN; return 0; } /* Register entry point for the peripheral controller driver. */ int usb_gadget_probe_driver(struct usb_gadget_driver *driver, int (*bind)(struct usb_gadget *)) { struct s3c_udc *dev = the_controller; int retval; DEBUG_SETUP("%s: %s\n", __func__, driver->driver.name); /* * adb composite fail to !driver->unbind in composite.c as below * static struct usb_gadget_driver composite_driver = { * .speed = USB_SPEED_HIGH, * .bind = composite_bind, * .unbind = __exit_p(composite_unbind), */ if (!driver || (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH) || !bind || !driver->disconnect || !driver->setup) return -EINVAL; if (!dev) return -ENODEV; if (dev->driver) return -EBUSY; /* first hook up the driver ... */ dev->driver = driver; /* initialize device status as self-powered.*/ dev->status = 1 << USB_DEVICE_SELF_POWERED; dev->gadget.dev.driver = &driver->driver; retval = device_add(&dev->gadget.dev); if (retval) { printk(KERN_ERR "target device_add failed, error %d\n", retval); return retval; } retval = bind(&dev->gadget); if (retval) { printk(KERN_ERR "%s: bind to driver %s --> error %d\n", dev->gadget.name, driver->driver.name, retval); device_del(&dev->gadget.dev); dev->driver = 0; dev->gadget.dev.driver = 0; return retval; } enable_irq(IRQ_OTG); retval = usb_gadget_vbus_connect(&dev->gadget); if (retval < 0) dev_dbg(&dev->gadget.dev, "%s vbus connect %d\n", __func__, retval); if (!(readl(S3C_UDC_OTG_GOTGCTL) & B_SESSION_VALID)) { retval = usb_gadget_vbus_disconnect(&dev->gadget); if (retval < 0) { dev_dbg(&dev->gadget.dev, "%s vbus disconnect %d\n", __func__, retval); } } printk(KERN_DEBUG "Registered gadget driver '%s'\n", driver->driver.name); return 0; } EXPORT_SYMBOL(usb_gadget_probe_driver); /* Unregister entry point for the peripheral controller driver. */ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) { struct s3c_udc *dev = the_controller; unsigned long flags; if (!dev) return -ENODEV; if (!driver || driver != dev->driver) return -EINVAL; spin_lock_irqsave(&dev->lock, flags); dev->driver = 0; stop_activity(dev, driver); spin_unlock_irqrestore(&dev->lock, flags); driver->unbind(&dev->gadget); device_del(&dev->gadget.dev); disable_irq(IRQ_OTG); printk(KERN_DEBUG "Unregistered gadget driver '%s'\n", driver->driver.name); udc_disable(dev); return 0; } EXPORT_SYMBOL(usb_gadget_unregister_driver); static int s3c_udc_power(struct s3c_udc *dev, char en) { pr_debug("%s : %s\n", __func__, en ? "ON" : "OFF"); if (en) { regulator_enable(dev->udc_vcc_d); regulator_enable(dev->udc_vcc_a); } else { regulator_disable(dev->udc_vcc_d); regulator_disable(dev->udc_vcc_a); } return 0; } int s3c_vbus_enable(struct usb_gadget *gadget, int enable) { unsigned long flags; struct s3c_udc *dev = the_controller; if (dev->udc_enabled != enable) { dev->udc_enabled = enable; if (!enable) { spin_lock_irqsave(&dev->lock, flags); stop_activity(dev, dev->driver); spin_unlock_irqrestore(&dev->lock, flags); udc_disable(dev); clk_disable(otg_clock); s3c_udc_power(dev, 0); } else { s3c_udc_power(dev, 1); clk_enable(otg_clock); udc_reinit(dev); udc_enable(dev); } } else dev_dbg(&dev->gadget.dev, "%s, udc : %d, en : %d\n", __func__, dev->udc_enabled, enable); return 0; } /* * done - retire a request; caller blocked irqs */ static void done(struct s3c_ep *ep, struct s3c_request *req, int status) { unsigned int stopped = ep->stopped; struct device *dev = &the_controller->dev->dev; DEBUG("%s: %s %p, req = %p, stopped = %d\n", __func__, ep->ep.name, ep, &req->req, stopped); list_del_init(&req->queue); if (likely(req->req.status == -EINPROGRESS)) req->req.status = status; else status = req->req.status; if (req->mapped) { dma_unmap_single(dev, req->req.dma, req->req.length, (ep->bEndpointAddress & USB_DIR_IN) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->req.dma = DMA_ADDR_INVALID; req->mapped = 0; } if (status && status != -ESHUTDOWN) { DEBUG("complete %s req %p stat %d len %u/%u\n", ep->ep.name, &req->req, status, req->req.actual, req->req.length); } /* don't modify queue heads during completion callback */ ep->stopped = 1; spin_unlock(&ep->dev->lock); req->req.complete(&ep->ep, &req->req); spin_lock(&ep->dev->lock); ep->stopped = stopped; } /* * nuke - dequeue ALL requests */ static void nuke(struct s3c_ep *ep, int status) { struct s3c_request *req; DEBUG("%s: %s %p\n", __func__, ep->ep.name, ep); /* called with irqs blocked */ while (!list_empty(&ep->queue)) { req = list_entry(ep->queue.next, struct s3c_request, queue); done(ep, req, status); } } static void stop_activity(struct s3c_udc *dev, struct usb_gadget_driver *driver) { int i; /* don't disconnect drivers more than once */ if (dev->gadget.speed == USB_SPEED_UNKNOWN) driver = 0; dev->gadget.speed = USB_SPEED_UNKNOWN; /* prevent new request submissions, kill any outstanding requests */ for (i = 0; i < S3C_MAX_ENDPOINTS; i++) { struct s3c_ep *ep = &dev->ep[i]; ep->stopped = 1; nuke(ep, -ESHUTDOWN); } /* report disconnect; the driver is already quiesced */ if (driver) { spin_unlock(&dev->lock); driver->disconnect(&dev->gadget); spin_lock(&dev->lock); } /* re-init driver-visible data structures */ udc_reinit(dev); } static void reconfig_usbd(void) { struct s3c_udc *dev = the_controller; /* 2. Soft-reset OTG Core and then unreset again. */ #ifdef DED_TX_FIFO int i; #endif unsigned int uTemp; writel(CORE_SOFT_RESET, S3C_UDC_OTG_GRSTCTL); writel(0<<15 /* PHY Low Power Clock sel*/ |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/ |0x5<<10 /* Turnaround time*/ |0<<9|0<<8 /* [0:HNP disable, 1:HNP enable][ 0:SRP disable, 1:SRP enable] H1= 1,1*/ |0<<7 /* Ulpi DDR sel*/ |0<<6 /* 0: high speed utmi+, 1: full speed serial*/ |0<<4 /* 0: utmi+, 1:ulpi*/ |1<<3 /* phy i/f 0:8bit, 1:16bit*/ |0x7<<0, /* HS/FS Timeout**/ S3C_UDC_OTG_GUSBCFG); /* 3. Put the OTG device core in the disconnected state.*/ uTemp = readl(S3C_UDC_OTG_DCTL); uTemp |= SOFT_DISCONNECT; writel(uTemp, S3C_UDC_OTG_DCTL); udelay(20); /* 4. Make the OTG device core exit from the disconnected state.*/ if (!dev->soft_disconnected) { uTemp = readl(S3C_UDC_OTG_DCTL); uTemp = uTemp & ~SOFT_DISCONNECT; writel(uTemp, S3C_UDC_OTG_DCTL); } /* 5. Configure OTG Core to initial settings of device mode.*/ /* [][1: full speed(30Mhz) 0:high speed]*/ writel(1<<18|0x0<<0, S3C_UDC_OTG_DCFG); mdelay(1); /* 6. Unmask the core interrupts*/ writel(GINTMSK_INIT, S3C_UDC_OTG_GINTMSK); /* 7. Set NAK bit of EP0, EP1, EP2*/ writel(DEPCTL_EPDIS|DEPCTL_SNAK|(0<<0), S3C_UDC_OTG_DOEPCTL(EP0_CON)); writel(DEPCTL_EPDIS|DEPCTL_SNAK|(0<<0), S3C_UDC_OTG_DIEPCTL(EP0_CON)); /* 8. Unmask EPO interrupts*/ writel(((1<gadget.speed = USB_SPEED_HIGH; } else { ep0_fifo_size = 64; ep_fifo_size = 64; ep_fifo_size2 = 64; dev->gadget.speed = USB_SPEED_FULL; } dev->ep[0].ep.maxpacket = ep0_fifo_size; for (i = 1; i < S3C_MAX_ENDPOINTS; i++) { /* fullspeed limitations don't apply to isochronous endpoints */ if (dev->ep[i].bmAttributes != USB_ENDPOINT_XFER_ISOC) dev->ep[i].ep.maxpacket = ep_fifo_size; } /* EP0 - Control IN (64 bytes)*/ ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON)); writel(ep_ctrl|(0<<0), S3C_UDC_OTG_DIEPCTL(EP0_CON)); /* EP0 - Control OUT (64 bytes)*/ ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(EP0_CON)); writel(ep_ctrl|(0<<0), S3C_UDC_OTG_DOEPCTL(EP0_CON)); } static int s3c_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { struct s3c_ep *ep; struct s3c_udc *dev; unsigned long flags; DEBUG("%s: %p\n", __func__, _ep); ep = container_of(_ep, struct s3c_ep, ep); if (!_ep || !desc || ep->desc || _ep->name == ep0name || desc->bDescriptorType != USB_DT_ENDPOINT || ep->bEndpointAddress != desc->bEndpointAddress || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) { DEBUG("%s: bad ep or descriptor\n", __func__); return -EINVAL; } /* xfer types must match, except that interrupt ~= bulk */ if (ep->bmAttributes != (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) && ep->bmAttributes != USB_ENDPOINT_XFER_BULK && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { DEBUG("%s: %s type mismatch\n", __func__, _ep->name); return -EINVAL; } /* hardware _could_ do smaller, but driver doesn't */ if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep)) || !desc->wMaxPacketSize) { DEBUG("%s: bad %s maxpacket\n", __func__, _ep->name); return -ERANGE; } dev = ep->dev; if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { DEBUG("%s: bogus device state\n", __func__); return -ESHUTDOWN; } ep->stopped = 0; ep->desc = desc; ep->pio_irqs = 0; ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); /* Reset halt state */ s3c_udc_set_halt(_ep, 0); spin_lock_irqsave(&ep->dev->lock, flags); s3c_udc_ep_activate(ep); spin_unlock_irqrestore(&ep->dev->lock, flags); DEBUG("%s: enabled %s, stopped = %d, maxpacket = %d\n", __func__, _ep->name, ep->stopped, ep->ep.maxpacket); return 0; } /** Disable EP */ static int s3c_ep_disable(struct usb_ep *_ep) { struct s3c_ep *ep; unsigned long flags; DEBUG("%s: %p\n", __func__, _ep); ep = container_of(_ep, struct s3c_ep, ep); if (!_ep || !ep->desc) { DEBUG("%s: %s not enabled\n", __func__, _ep ? ep->ep.name : NULL); return -EINVAL; } spin_lock_irqsave(&ep->dev->lock, flags); /* Nuke all pending requests */ nuke(ep, -ESHUTDOWN); ep->desc = 0; ep->stopped = 1; spin_unlock_irqrestore(&ep->dev->lock, flags); DEBUG("%s: disabled %s\n", __func__, _ep->name); return 0; } static struct usb_request *s3c_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) { struct s3c_request *req; DEBUG("%s: %s %p\n", __func__, ep->name, ep); req = kzalloc(sizeof(*req), gfp_flags); if (req) INIT_LIST_HEAD(&req->queue); return &req->req; } static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req) { struct s3c_request *req = container_of(_req, struct s3c_request, req); DEBUG("%s: %p\n", __func__, ep); kfree(req); } /* dequeue JUST ONE request */ static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct s3c_ep *ep; struct s3c_request *req; unsigned long flags; DEBUG("%s: %p\n", __func__, _ep); ep = container_of(_ep, struct s3c_ep, ep); if (!_ep || ep->ep.name == ep0name) return -EINVAL; spin_lock_irqsave(&ep->dev->lock, flags); /* make sure it's actually queued on this endpoint */ list_for_each_entry(req, &ep->queue, queue) { if (&req->req == _req) break; } if (&req->req != _req) { spin_unlock_irqrestore(&ep->dev->lock, flags); return -EINVAL; } done(ep, req, -ECONNRESET); spin_unlock_irqrestore(&ep->dev->lock, flags); return 0; } /** Return bytes in EP FIFO */ static int s3c_fifo_status(struct usb_ep *_ep) { int count = 0; struct s3c_ep *ep; ep = container_of(_ep, struct s3c_ep, ep); if (!_ep) { DEBUG("%s: bad ep\n", __func__); return -ENODEV; } DEBUG("%s: %d\n", __func__, ep_index(ep)); /* LPD can't report unclaimed bytes from IN fifos */ if (ep_is_in(ep)) return -EOPNOTSUPP; return count; } /** Flush EP FIFO */ static void s3c_fifo_flush(struct usb_ep *_ep) { struct s3c_ep *ep; ep = container_of(_ep, struct s3c_ep, ep); if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { DEBUG("%s: bad ep\n", __func__); return; } DEBUG("%s: %d\n", __func__, ep_index(ep)); } /* --------------------------------------------------------------------------- * device-scoped parts of the api to the usb controller hardware * --------------------------------------------------------------------------- */ static int s3c_udc_get_frame(struct usb_gadget *_gadget) { unsigned int frame; DEBUG("%s: %p\n", __func__, _gadget); /*fram count number [21:8]*/ frame = readl(S3C_UDC_OTG_DSTS); frame &= SOFFN_MASK; frame >>= SOFFN_SHIFT; return frame; } static int s3c_udc_wakeup(struct usb_gadget *_gadget) { unsigned int dev_gctl, dev_dctl, dev_status; unsigned long flags; int retVal = -EINVAL; struct s3c_udc *dev = the_controller; DEBUG("%s: %p\n", __func__, _gadget); if (!_gadget) return -ENODEV; spin_lock_irqsave(&dev->lock, flags); if (!(dev->status & (1 << USB_DEVICE_REMOTE_WAKEUP))) { DEBUG_SETUP("%s::Remote Wakeup is not set\n", __func__); goto wakeup_exit; } /* check for session */ dev_gctl = readl(S3C_UDC_OTG_GOTGCTL); if (dev_gctl & B_SESSION_VALID) { /* check for suspend state */ dev_status = readl(S3C_UDC_OTG_DSTS); if (dev_status & USB_SUSPEND) { DEBUG_SETUP("%s:: Set Remote wakeup\n", __func__); dev_dctl = readl(S3C_UDC_OTG_DCTL); dev_dctl |= REMOTE_WAKEUP; writel(dev_dctl, S3C_UDC_OTG_DCTL); mdelay(1); DEBUG_SETUP("%s:: Clear Remote Wakeup\n", __func__); dev_dctl = readl(S3C_UDC_OTG_DCTL); dev_dctl &= (~REMOTE_WAKEUP); writel(dev_dctl, S3C_UDC_OTG_DCTL); } else { DEBUG_SETUP("%s:: already woke up\n", __func__); } } else if (dev_gctl & SESSION_REQ) { DEBUG_SETUP("%s:: Session request already active\n", __func__); goto wakeup_exit; } retVal = 0; wakeup_exit: spin_unlock_irqrestore(&dev->lock, flags); return retVal; } void s3c_udc_soft_connect(void) { struct s3c_udc *dev = the_controller; unsigned long flags; u32 uTemp; DEBUG("[%s]\n", __func__); spin_lock_irqsave(&dev->lock, flags); uTemp = readl(S3C_UDC_OTG_DCTL); uTemp = uTemp & ~SOFT_DISCONNECT; writel(uTemp, S3C_UDC_OTG_DCTL); udelay(20); reset_available = 1; /* Unmask the core interrupt */ writel(readl(S3C_UDC_OTG_GINTSTS), S3C_UDC_OTG_GINTSTS); writel(GINTMSK_INIT, S3C_UDC_OTG_GINTMSK); dev->soft_disconnected = 0; spin_unlock_irqrestore(&dev->lock, flags); } void s3c_udc_soft_disconnect(void) { u32 uTemp; struct s3c_udc *dev = the_controller; unsigned long flags; DEBUG("[%s]\n", __func__); spin_lock_irqsave(&dev->lock, flags); /* Mask the core interrupt */ writel(0, S3C_UDC_OTG_GINTMSK); uTemp = readl(S3C_UDC_OTG_DCTL); uTemp |= SOFT_DISCONNECT; writel(uTemp, S3C_UDC_OTG_DCTL); stop_activity(dev, dev->driver); dev->soft_disconnected = 1; spin_unlock_irqrestore(&dev->lock, flags); } static int s3c_udc_pullup(struct usb_gadget *gadget, int is_on) { if (is_on) s3c_udc_soft_connect(); else s3c_udc_soft_disconnect(); return 0; } static const struct usb_gadget_ops s3c_udc_ops = { .get_frame = s3c_udc_get_frame, .wakeup = s3c_udc_wakeup, /* current versions must always be self-powered */ .pullup = s3c_udc_pullup, .vbus_session = s3c_vbus_enable, }; static void nop_release(struct device *dev) { DEBUG("%s\n", __func__); } static struct s3c_udc memory = { .usb_address = 0, .gadget = { .ops = &s3c_udc_ops, .ep0 = &memory.ep[0].ep, .name = driver_name, .dev = { .release = nop_release, }, }, /* control endpoint */ .ep[0] = { .ep = { .name = ep0name, .ops = &s3c_ep_ops, .maxpacket = EP0_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = 0, .bmAttributes = 0, .ep_type = ep_control, .fifo = (unsigned int) S3C_UDC_OTG_EP0_FIFO, }, /* first group of endpoints */ .ep[1] = { .ep = { .name = "ep1-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_OUT | 1, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_out, .fifo = (unsigned int) S3C_UDC_OTG_EP1_FIFO, }, .ep[2] = { .ep = { .name = "ep2-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 2, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_in, .fifo = (unsigned int) S3C_UDC_OTG_EP2_FIFO, }, .ep[3] = { .ep = { .name = "ep3-int", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 3, .bmAttributes = USB_ENDPOINT_XFER_INT, .ep_type = ep_interrupt, .fifo = (unsigned int) S3C_UDC_OTG_EP3_FIFO, }, .ep[4] = { .ep = { .name = "ep4-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_OUT | 4, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_out, .fifo = (unsigned int) S3C_UDC_OTG_EP4_FIFO, }, .ep[5] = { .ep = { .name = "ep5-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 5, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_in, .fifo = (unsigned int) S3C_UDC_OTG_EP5_FIFO, }, .ep[6] = { .ep = { .name = "ep6-int", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 6, .bmAttributes = USB_ENDPOINT_XFER_INT, .ep_type = ep_interrupt, .fifo = (unsigned int) S3C_UDC_OTG_EP6_FIFO, }, .ep[7] = { .ep = { .name = "ep7-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_OUT | 7, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_out, .fifo = (unsigned int) S3C_UDC_OTG_EP7_FIFO, }, .ep[8] = { .ep = { .name = "ep8-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 8, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_in, .fifo = (unsigned int) S3C_UDC_OTG_EP8_FIFO, }, .ep[9] = { .ep = { .name = "ep9-int", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 9, .bmAttributes = USB_ENDPOINT_XFER_INT, .ep_type = ep_interrupt, .fifo = (unsigned int) S3C_UDC_OTG_EP9_FIFO, }, .ep[10] = { .ep = { .name = "ep10-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_OUT | 0xa, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_out, .fifo = (unsigned int) S3C_UDC_OTG_EP10_FIFO, }, .ep[11] = { .ep = { .name = "ep11-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 0xb, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_in, .fifo = (unsigned int) S3C_UDC_OTG_EP11_FIFO, }, .ep[12] = { .ep = { .name = "ep12-int", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 0xc, .bmAttributes = USB_ENDPOINT_XFER_INT, .ep_type = ep_interrupt, .fifo = (unsigned int) S3C_UDC_OTG_EP12_FIFO, }, .ep[13] = { .ep = { .name = "ep13-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_OUT | 0xd, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_out, .fifo = (unsigned int) S3C_UDC_OTG_EP13_FIFO, }, .ep[14] = { .ep = { .name = "ep14-bulk", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 0xe, .bmAttributes = USB_ENDPOINT_XFER_BULK, .ep_type = ep_bulk_in, .fifo = (unsigned int) S3C_UDC_OTG_EP14_FIFO, }, .ep[15] = { .ep = { .name = "ep15-iso", .ops = &s3c_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 0xf, .bmAttributes = USB_ENDPOINT_XFER_ISOC, .ep_type = ep_isochronous, .fifo = (unsigned int) S3C_UDC_OTG_EP15_FIFO, }, }; #if defined CONFIG_USB_S3C_OTG_HOST || defined CONFIG_USB_DWC_OTG atomic_t g_OtgHostMode; // actual mode: client (0) or host (1) atomic_t g_OtgOperationMode; // operation mode: 'c'lient, 'h'ost, 'o'tg or 'a'uto-host atomic_t g_OtgLastCableState; // last cable state: detached (0), client attached (1), otg attached (2) atomic_t g_OtgDriver; // driver to use: 0: S3C High-speed, 1: S3C Low-speed/Full-speed, 2: DWC int s3c_is_otgmode(void) { printk("otgmode = %d\n", atomic_read(&g_OtgHostMode)); return atomic_read(&g_OtgHostMode); } EXPORT_SYMBOL(s3c_is_otgmode); int s3c_get_drivermode(void) { printk("drivermode = %d\n", atomic_read(&g_OtgDriver)); return atomic_read(&g_OtgDriver); } EXPORT_SYMBOL(s3c_get_drivermode); void set_otghost_mode(int mode) { //sztupy: // this function will determine what to do with the new information according to the current mode of operation // mode: 0: cable detached, 1: client cable attached, 2: otg cable attached, -1: operation config changed // modes of operation: c: always client, h: always host, g: otg mode (host if otg cable), a: automatic mode (host if cable plugged in) struct s3c_udc *dev = the_controller; int enable = 0; int rval; char opmode = atomic_read(&g_OtgOperationMode); if (mode==-1) mode = atomic_read(&g_OtgLastCableState); atomic_set(&g_OtgLastCableState, mode); switch (opmode) { case 'h': enable = 1; break; case 'o': enable = (mode==2); break; case 'a': enable = (mode>0); break; default: atomic_set(&g_OtgOperationMode,'c'); enable = 0; break; } if (enable && !atomic_read(&g_OtgHostMode)) { printk("Setting OTG host mode\n"); free_irq(IRQ_OTG, dev); s3c_vbus_enable(&dev->gadget, 1); #if defined CONFIG_USB_S3C_OTG_HOST && defined CONFIG_USB_DWC_OTG if (atomic_read(&g_OtgDriver) & USB_OTG_DRIVER_DWC) { rval = platform_driver_register(&dwc_otg_driver); } else { rval = platform_driver_register(&s5pc110_otg_driver); } if (rval < 0) #elif defined CONFIG_USB_DWC_OTG if (platform_driver_register(&dwc_otg_driver) < 0) #elif defined CONFIG_USB_S3C_OTG_HOST if (platform_driver_register(&s5pc110_otg_driver) < 0) #endif { printk("platform_driver_register failed...\n"); atomic_set(&g_OtgHostMode , 0); } else { printk("platform_driver_registered\n"); atomic_set(&g_OtgHostMode , atomic_read(&g_OtgDriver)+1); } } else if (!enable && atomic_read(&g_OtgHostMode)) { // sztupy: also handle the disabling here printk("Disabling OTG host mode\n"); s3c_vbus_enable(&dev->gadget, 0); #if defined CONFIG_USB_S3C_OTG_HOST && defined CONFIG_USB_DWC_OTG if ((atomic_read(&g_OtgHostMode)-1) & USB_OTG_DRIVER_DWC) { platform_driver_unregister(&dwc_otg_driver); } else { platform_driver_unregister(&s5pc110_otg_driver); } #elif defined CONFIG_USB_S3C_OTG_HOST platform_driver_unregister(&s5pc110_otg_driver); #elif defined CONFIG_USB_DWC_OTG platform_driver_unregister(&dwc_otg_driver); #endif printk("platform_driver_unregistered\n"); /* irq setup after old hardware state is cleaned up */ if (request_irq(IRQ_OTG, s3c_udc_irq, 0, driver_name, dev)) { printk("Warning: Could not request IRQ for USB gadget!\n"); } atomic_set(&g_OtgHostMode , 0); } else { printk("OTG: no changes needed\n"); } } EXPORT_SYMBOL(set_otghost_mode); static ssize_t usbmode_read(struct device *dev, struct device_attribute *attr, char *buf) { const char *msg = "client"; const char *msg2 = "disconnected"; const char *msg3 = "gadget"; switch(atomic_read(&g_OtgOperationMode)) { case 'o': msg = "otg"; break; case 'h': msg = "host"; break; case 'a': msg = "auto-host"; break; } switch(atomic_read(&g_OtgLastCableState)) { case 1: msg2 = "usb connected"; break; case 2: msg2 = "otg connected"; break; } switch(atomic_read(&g_OtgHostMode)) { case USB_OTG_DRIVER_S3CHS: msg3 = "host (S3C/HS)"; break; case USB_OTG_DRIVER_S3CFSLS: msg3 = "host (S3C/FSLS)"; break; case USB_OTG_DRIVER_DWC: msg3 = "host (DWC)"; break; } return sprintf(buf,"%s (cable: %s; state: %s)\n", msg, msg2, msg3); } static ssize_t usbmode_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { char c; printk("input data --> %s", buf); c = buf[0]; switch(c) { case 'a': atomic_set(&g_OtgOperationMode, 'a'); set_otghost_mode(-1);break; case 'h': atomic_set(&g_OtgOperationMode, 'h'); set_otghost_mode(-1);break; case 'c': atomic_set(&g_OtgOperationMode, 'c'); set_otghost_mode(-1);break; case 'o': atomic_set(&g_OtgOperationMode, 'o'); set_otghost_mode(-1);break; default: printk("Invalid input data\n"); } return size; } static ssize_t usbdriver_read(struct device *dev, struct device_attribute *attr, char *buf) { const char *msg = "h:S3C driver (high-speed)"; switch(atomic_read(&g_OtgDriver)) { case USB_OTG_DRIVER_S3CFSLS: msg = "l:S3C driver (low-speed / full-speed)";break; case USB_OTG_DRIVER_DWC: msg = "d:DWC driver";break; } return sprintf(buf,"%s\n",msg); } static ssize_t usbdriver_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { char c; printk("input data --> %s", buf); c = buf[0]; switch(c) { #if defined CONFIG_USB_S3C_OTG_HOST case 'h': atomic_set(&g_OtgDriver, USB_OTG_DRIVER_S3CHS); break; case 'l': atomic_set(&g_OtgDriver, USB_OTG_DRIVER_S3CFSLS); break; #endif #if defined CONFIG_USB_DWC_OTG case 'd': atomic_set(&g_OtgDriver, USB_OTG_DRIVER_DWC); break; #endif default: printk("Invalid input data\n"); } return size; } static ssize_t usbversion_read(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf,"version: build 5\ndrivers:%s%s\n", #if defined CONFIG_USB_S3C_OTG_HOST " S3CHS S3CFSLS" #else "" #endif , #if defined CONFIG_USB_DWC_OTG " DWC" #else "" #endif ); } // kevinh - Allow changing USB host/target modes on S3C android devices without a special cable static DEVICE_ATTR(opmode, S_IRUGO | S_IWUSR, usbmode_read, usbmode_write); // sztupy - add some more attributes static DEVICE_ATTR(hostdriver, S_IRUGO | S_IWUSR, usbdriver_read, usbdriver_write); static DEVICE_ATTR(version, S_IRUGO, usbversion_read, NULL); #endif /* * probe - binds to the platform device */ static int s3c_udc_probe(struct platform_device *pdev) { struct s3c_udc *dev = &memory; int retval; DEBUG("%s: %p\n", __func__, pdev); spin_lock_init(&dev->lock); dev->dev = pdev; device_initialize(&dev->gadget.dev); dev->gadget.dev.parent = &pdev->dev; dev->gadget.is_dualspeed = 1; /* Hack only*/ dev->gadget.is_otg = 0; dev->gadget.is_a_peripheral = 0; dev->gadget.b_hnp_enable = 0; dev->gadget.a_hnp_support = 0; dev->gadget.a_alt_hnp_support = 0; dev->udc_vcc_d = regulator_get(&pdev->dev, "pd_io"); dev->udc_vcc_a = regulator_get(&pdev->dev, "pd_core"); if (IS_ERR(dev->udc_vcc_d) || IS_ERR(dev->udc_vcc_a)) { printk(KERN_ERR "failed to find udc vcc source\n"); return -ENOENT; } the_controller = dev; platform_set_drvdata(pdev, dev); dev_set_name(&dev->gadget.dev, "gadget"); otg_clock = clk_get(&pdev->dev, "otg"); if (otg_clock == NULL) { printk(KERN_ERR "failed to find otg clock source\n"); return -ENOENT; } udc_reinit(dev); /* irq setup after old hardware state is cleaned up */ retval = request_irq(IRQ_OTG, s3c_udc_irq, 0, driver_name, dev); if (retval != 0) { DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name, IRQ_OTG, retval); return -EBUSY; } disable_irq(IRQ_OTG); create_proc_files(); #if defined CONFIG_USB_S3C_OTG_HOST || defined CONFIG_USB_DWC_OTG if (device_create_file(&pdev->dev, &dev_attr_opmode) < 0) printk("Failed to create device file(%s)!\n", dev_attr_opmode.attr.name); if (device_create_file(&pdev->dev, &dev_attr_hostdriver) < 0) printk("Failed to create device file(%s)!\n", dev_attr_hostdriver.attr.name); if (device_create_file(&pdev->dev, &dev_attr_version) < 0) printk("Failed to create device file(%s)!\n", dev_attr_version.attr.name); #if !defined CONFIG_USB_S3C_OTG_HOST atomic_set(&g_OtgDriver, USB_OTG_DRIVER_DWC); #endif #endif return retval; } static int s3c_udc_remove(struct platform_device *pdev) { struct s3c_udc *dev = platform_get_drvdata(pdev); DEBUG("%s: %p\n", __func__, pdev); if (otg_clock != NULL) { clk_disable(otg_clock); clk_put(otg_clock); otg_clock = NULL; } remove_proc_files(); usb_gadget_unregister_driver(dev->driver); free_irq(IRQ_OTG, dev); platform_set_drvdata(pdev, 0); the_controller = 0; return 0; } #ifdef CONFIG_PM static int s3c_udc_suspend(struct platform_device *pdev, pm_message_t state) { struct s3c_udc *dev = the_controller; disable_irq(IRQ_OTG); if (dev->driver && dev->driver->suspend) dev->driver->suspend(&dev->gadget); if (dev->udc_enabled) usb_gadget_vbus_disconnect(&dev->gadget); return 0; } static int s3c_udc_resume(struct platform_device *pdev) { struct s3c_udc *dev = the_controller; if (dev->driver && dev->driver->resume) dev->driver->resume(&dev->gadget); enable_irq(IRQ_OTG); return 0; } #else #define s3c_udc_suspend NULL #define s3c_udc_resume NULL #endif /* CONFIG_PM */ /*-------------------------------------------------------------------------*/ static struct platform_driver s3c_udc_driver = { .probe = s3c_udc_probe, .remove = s3c_udc_remove, .suspend = s3c_udc_suspend, .resume = s3c_udc_resume, .driver = { .owner = THIS_MODULE, .name = "s3c-usbgadget", }, }; static int __init udc_init(void) { int ret; ret = platform_driver_register(&s3c_udc_driver); if (!ret) printk(KERN_INFO "%s : %s\n" "%s : version %s %s\n", driver_name, DRIVER_DESC, driver_name, DRIVER_VERSION, OTG_DMA_MODE ? "(DMA Mode)" : "(Slave Mode)"); return ret; } static void __exit udc_exit(void) { platform_driver_unregister(&s3c_udc_driver); printk(KERN_INFO "Unloaded %s version %s\n", driver_name, DRIVER_VERSION); } module_init(udc_init); module_exit(udc_exit); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR("Samsung"); MODULE_LICENSE("GPL");