/* * 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 #if 1 #undef DEBUG_S3C_UDC_SETUP #undef DEBUG_S3C_UDC_EP0 #undef DEBUG_S3C_UDC_ISR #undef DEBUG_S3C_UDC_OUT_EP #undef DEBUG_S3C_UDC_IN_EP #undef DEBUG_S3C_UDC #else #define DEBUG_S3C_UDC_SETUP #define DEBUG_S3C_UDC_EP0 #define DEBUG_S3C_UDC_ISR #define DEBUG_S3C_UDC_OUT_EP #define DEBUG_S3C_UDC_IN_EP #define DEBUG_S3C_UDC #endif #define EP0_CON 0 #define EP1_OUT 1 #define EP2_IN 2 #define EP3_IN 3 #define EP_MASK 0xF #define BACK2BACK_SIZE 4 #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...) printk(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...) printk(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 OTG Device Driver,"\ "(c) 2008-2009 Samsung Electronics" #define DRIVER_VERSION "15 March 2009" struct s3c_udc *the_controller; 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_disable(struct s3c_udc *dev); static void udc_set_address(struct s3c_udc *dev, unsigned char address); static void reset_usbd(void); 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 void s3c_udc_soft_connect(void); static void s3c_udc_soft_disconnect(void); 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 */ #include "s3c_udc_otg_xfer_dma.c" /* * udc_core_disconnect * Ask On Connection - Vzw requirement */ static void udc_core_disconect(struct s3c_udc *dev) { u32 uTemp; printk(KERN_DEBUG "usb: %s -dev->softconnect=%d\n", __func__, dev->softconnect); uTemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); uTemp |= SOFT_DISCONNECT; __raw_writel(uTemp, dev->regs + S3C_UDC_OTG_DCTL); } /* * udc_disable - disable USB device controller */ static void udc_disable(struct s3c_udc *dev) { struct platform_device *pdev = dev->dev; struct s5p_usbgadget_platdata *pdata = pdev->dev.platform_data; u32 utemp; DEBUG_SETUP("%s: %p\n", __func__, dev); disable_irq(dev->irq); udc_set_address(dev, 0); dev->ep0state = WAIT_FOR_SETUP; dev->gadget.speed = USB_SPEED_UNKNOWN; dev->usb_address = 0; /* Mask the core interrupt */ __raw_writel(0, dev->regs + S3C_UDC_OTG_GINTMSK); /* Put the OTG device core in the disconnected state.*/ utemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); utemp |= SOFT_DISCONNECT; __raw_writel(utemp, dev->regs + S3C_UDC_OTG_DCTL); udelay(20); if (pdata && pdata->phy_exit) pdata->phy_exit(pdev, S5P_USB_PHY_DEVICE); clk_disable(dev->clk); } /* * 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) { struct platform_device *pdev = dev->dev; struct s5p_usbgadget_platdata *pdata = pdev->dev.platform_data; DEBUG_SETUP("%s: %p\n", __func__, dev); enable_irq(dev->irq); clk_enable(dev->clk); if (pdata->phy_init) pdata->phy_init(pdev, S5P_USB_PHY_DEVICE); reconfig_usbd(); DEBUG_SETUP("S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n", __raw_readl(dev->regs + S3C_UDC_OTG_GINTMSK)); dev->gadget.speed = USB_SPEED_UNKNOWN; return 0; } int s3c_vbus_enable(struct usb_gadget *gadget, int is_active) { unsigned long flags; struct s3c_udc *dev = container_of(gadget, struct s3c_udc, gadget); mutex_lock(&dev->mutex); if (dev->is_usb_ready) { printk(KERN_DEBUG "usb: %s, ready u_e: %d, is_active: %d\n", __func__, dev->udc_enabled, is_active); } else { /* USB is not ready to enable USB PHY */ printk(KERN_DEBUG "usb: %s, not ready u_e: %d, is_active: %d\n", __func__, dev->udc_enabled, is_active); dev->udc_enabled = is_active; mutex_unlock(&dev->mutex); return 0; } if (dev->udc_enabled != is_active) { dev->udc_enabled = is_active; if (!is_active) { printk(KERN_DEBUG "usb: %s is_active=%d(udc_disable)\n", __func__, is_active); spin_lock_irqsave(&dev->lock, flags); stop_activity(dev, dev->driver); spin_unlock_irqrestore(&dev->lock, flags); udc_disable(dev); #if defined(CONFIG_BATTERY_SAMSUNG) s3c_udc_cable_disconnect(dev); #endif wake_lock_timeout(&dev->usbd_wake_lock, HZ * 5); wake_lock_timeout(&dev->usb_cb_wake_lock, HZ * 5); } else { printk(KERN_DEBUG "usb: %s is_active=%d(udc_enable)," "softconnect=%d\n", __func__, is_active, dev->softconnect); wake_lock(&dev->usb_cb_wake_lock); udc_reinit(dev); udc_enable(dev); if (!dev->softconnect) udc_core_disconect(dev); } } else { printk(KERN_DEBUG "usb: %s, udc_enabled : %d, is_active : %d\n", __func__, dev->udc_enabled, is_active); } mutex_unlock(&dev->mutex); 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); 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; dev->gadget.dev.driver = &driver->driver; retval = device_add(&dev->gadget.dev); if (retval) { /* TODO */ 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; } #if defined(CONFIG_USB_EXYNOS_SWITCH) || defined(CONFIG_MFD_MAX77693)\ || defined(CONFIG_MFD_MAX8997) || defined(CONFIG_MFD_MAX77686) printk(KERN_INFO "usb: Skip udc_enable\n"); #else printk(KERN_INFO "usb: udc_enable\n"); udc_enable(dev); dev->udc_enabled = 1; #endif 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); printk(KERN_INFO "Unregistered gadget driver '%s'\n", driver->driver.name); udc_disable(dev); return 0; } EXPORT_SYMBOL(usb_gadget_unregister_driver); /* * 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 reset_usbd(void) { struct s3c_udc *dev = the_controller; unsigned int utemp; #ifdef DED_TX_FIFO int i; for (i = 0; i < S3C_MAX_ENDPOINTS; i++) { utemp = __raw_readl(dev->regs + S3C_UDC_OTG_DIEPCTL(i)); if (utemp & DEPCTL_EPENA) __raw_writel(utemp|DEPCTL_EPDIS|DEPCTL_SNAK, dev->regs + S3C_UDC_OTG_DIEPCTL(i)); /* OUT EP0 cannot be disabled */ if (i != 0) { utemp = __raw_readl(dev->regs + S3C_UDC_OTG_DOEPCTL(i)); if (utemp & DEPCTL_EPENA) __raw_writel(utemp|DEPCTL_EPDIS|DEPCTL_SNAK, dev->regs + S3C_UDC_OTG_DOEPCTL(i)); } } #endif /* 5. Configure OTG Core to initial settings of device mode.*/ __raw_writel(1<<18|0x0<<0, dev->regs + S3C_UDC_OTG_DCFG); mdelay(1); /* 6. Unmask the core interrupts*/ __raw_writel(GINTMSK_INIT, dev->regs + S3C_UDC_OTG_GINTMSK); /* 7. Set NAK bit of OUT EP0*/ __raw_writel(DEPCTL_SNAK, dev->regs + S3C_UDC_OTG_DOEPCTL(EP0_CON)); /* 8. Unmask EPO interrupts*/ __raw_writel(((1<regs + S3C_UDC_OTG_DAINTMSK); /* 9. Unmask device OUT EP common interrupts*/ __raw_writel(DOEPMSK_INIT, dev->regs + S3C_UDC_OTG_DOEPMSK); /* 10. Unmask device IN EP common interrupts*/ __raw_writel(DIEPMSK_INIT, dev->regs + S3C_UDC_OTG_DIEPMSK); /* 11. Set Rx FIFO Size (in 32-bit words) */ __raw_writel(RX_FIFO_SIZE, dev->regs + S3C_UDC_OTG_GRXFSIZ); /* 12. Set Non Periodic Tx FIFO Size*/ __raw_writel((NPTX_FIFO_SIZE) << 16 | (NPTX_FIFO_START_ADDR) << 0, dev->regs + S3C_UDC_OTG_GNPTXFSIZ); #ifdef DED_TX_FIFO for (i = 1; i < S3C_MAX_ENDPOINTS; i++) __raw_writel((PTX_FIFO_SIZE) << 16 | (NPTX_FIFO_START_ADDR + NPTX_FIFO_SIZE + PTX_FIFO_SIZE*(i-1)) << 0, dev->regs + S3C_UDC_OTG_DIEPTXF(i)); #endif /* Flush the RX FIFO */ __raw_writel(0x10, dev->regs + S3C_UDC_OTG_GRSTCTL); while (__raw_readl(dev->regs + S3C_UDC_OTG_GRSTCTL) & 0x10) ; /* Flush all the Tx FIFO's */ __raw_writel(0x10<<6, dev->regs + S3C_UDC_OTG_GRSTCTL); __raw_writel((0x10<<6)|0x20, dev->regs + S3C_UDC_OTG_GRSTCTL); while (__raw_readl(dev->regs + S3C_UDC_OTG_GRSTCTL) & 0x20) ; /* 13. Clear NAK bit of OUT EP0*/ /* For Slave mode*/ __raw_writel(DEPCTL_CNAK, dev->regs + S3C_UDC_OTG_DOEPCTL(EP0_CON)); /* 14. Initialize OTG Link Core.*/ __raw_writel(GAHBCFG_INIT, dev->regs + S3C_UDC_OTG_GAHBCFG); } static void reconfig_usbd(void) { struct s3c_udc *dev = the_controller; unsigned int utemp; /* 2. Soft-reset OTG Core and then unreset again. */ __raw_writel(CORE_SOFT_RESET, dev->regs + S3C_UDC_OTG_GRSTCTL); utemp = (0<<15 /* PHY Low Power Clock sel */ |1<<14 /* Non-Periodic TxFIFO Rewind Enable */ |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 */ |0x7<<0); /* HS/FS Timeout */ /* [13:10] Turnaround time 0x5:16-bit 0x9:8-bit UTMI+ */ /* [3] phy i/f 0:8bit, 1:16bit */ if (soc_is_exynos4210()) utemp |= (0x5<<10 | 1<<3); else utemp |= (0x9<<10 | 0<<3); __raw_writel(utemp, dev->regs + S3C_UDC_OTG_GUSBCFG); /* 3. Put the OTG device core in the disconnected state.*/ utemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); utemp |= SOFT_DISCONNECT; __raw_writel(utemp, dev->regs + S3C_UDC_OTG_DCTL); udelay(20); /* 4. Make the OTG device core exit from the disconnected state.*/ utemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); utemp = utemp & ~SOFT_DISCONNECT; __raw_writel(utemp, dev->regs + S3C_UDC_OTG_DCTL); reset_usbd(); } static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed) { unsigned int ep_ctrl; int i; if (speed == USB_SPEED_HIGH) { ep0_fifo_size = 64; ep_fifo_size = 512; ep_fifo_size2 = 1024; dev->gadget.speed = USB_SPEED_HIGH; } else { ep0_fifo_size = 64; ep_fifo_size = 64; ep_fifo_size2 = 1023; dev->gadget.speed = USB_SPEED_FULL; } dev->ep[0].ep.maxpacket = ep0_fifo_size; for (i = 1; i < S3C_MAX_ENDPOINTS; i++) { if (dev->ep[i].bmAttributes == USB_ENDPOINT_XFER_ISOC) dev->ep[i].ep.maxpacket = ep_fifo_size2; else dev->ep[i].ep.maxpacket = ep_fifo_size; } /* EP0 - Control IN (64 bytes)*/ ep_ctrl = __raw_readl(dev->regs + S3C_UDC_OTG_DIEPCTL(EP0_CON)); __raw_writel(ep_ctrl|(0<<0), dev->regs + S3C_UDC_OTG_DIEPCTL(EP0_CON)); /* EP0 - Control OUT (64 bytes)*/ ep_ctrl = __raw_readl(dev->regs + S3C_UDC_OTG_DOEPCTL(EP0_CON)); __raw_writel(ep_ctrl|(0<<0), dev->regs + 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 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && 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 = kmalloc(sizeof *req, gfp_flags); if (!req) return 0; memset(req, 0, sizeof *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; DEBUG("%s: %p\n", __func__, ep); req = container_of(_req, struct s3c_request, req); WARN_ON(!list_empty(&req->queue)); 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) { struct s3c_udc *dev = container_of(_gadget, struct s3c_udc, gadget); /*fram count number [21:8]*/ unsigned int frame = __raw_readl(dev->regs + S3C_UDC_OTG_DSTS); DEBUG("%s: %p\n", __func__, _gadget); return frame & 0x3ff00; } static int s3c_udc_wakeup(struct usb_gadget *_gadget) { DEBUG("%s: %p\n", __func__, _gadget); return -ENOTSUPP; } static void s3c_udc_soft_connect(void) { struct s3c_udc *dev = the_controller; u32 uTemp; DEBUG("[%s]\n", __func__); uTemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); uTemp = uTemp & ~SOFT_DISCONNECT; __raw_writel(uTemp, dev->regs + S3C_UDC_OTG_DCTL); } static void s3c_udc_soft_disconnect(void) { struct s3c_udc *dev = the_controller; u32 uTemp; unsigned long flags; DEBUG("[%s]\n", __func__); uTemp = __raw_readl(dev->regs + S3C_UDC_OTG_DCTL); uTemp |= SOFT_DISCONNECT; __raw_writel(uTemp, dev->regs + S3C_UDC_OTG_DCTL); spin_lock_irqsave(&dev->lock, flags); stop_activity(dev, dev->driver); spin_unlock_irqrestore(&dev->lock, flags); } static int s3c_udc_pullup(struct usb_gadget *gadget, int is_on) { struct s3c_udc *dev = container_of(gadget, struct s3c_udc, gadget); dev->softconnect = 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 %s\n", __func__, dev->bus_id); } 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 | 10, .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 | 11, .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 | 12, .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 | 13, .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 | 14, .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_SIZE2, }, .dev = &memory, .bEndpointAddress = USB_DIR_IN | 15, .bmAttributes = USB_ENDPOINT_XFER_ISOC, .ep_type = ep_iso_in, .fifo = (unsigned int) S3C_UDC_OTG_EP15_FIFO, }, }; static void usb_ready(struct work_struct *work) { struct s3c_udc *dev = container_of(work, struct s3c_udc, usb_ready_work.work); if (!dev) { printk(KERN_DEBUG "usb: %s dev is NULL\n", __func__); return ; } printk(KERN_DEBUG "usb: %s udc_enable=%d\n", __func__, dev->udc_enabled); dev->is_usb_ready = true; if (dev->udc_enabled) { dev->udc_enabled = 0; s3c_vbus_enable(&dev->gadget, 1); } } /* * probe - binds to the platform device */ static int s3c_udc_probe(struct platform_device *pdev) { struct s5p_usbgadget_platdata *pdata; struct s3c_udc *dev = &memory; struct resource *res; unsigned int irq; int retval; if (!pdev) { pr_err("%s: pdev is null\n", __func__); return -EINVAL; } DEBUG("%s: %p\n", __func__, pdev); pdata = pdev->dev.platform_data; if (!pdata) { dev_err(&pdev->dev, "No platform data defined\n"); return -EINVAL; } #ifdef CONFIG_USB_S3C_OTG_HOST pdata->udc_irq = s3c_udc_irq; pr_info("otg pdata %p, irq %p\n", pdata, pdata->udc_irq); #endif spin_lock_init(&dev->lock); dev->dev = pdev; device_initialize(&dev->gadget.dev); dev->gadget.dev.parent = &pdev->dev; dev_set_name(&dev->gadget.dev, "%s", "gadget"); 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; the_controller = dev; platform_set_drvdata(pdev, dev); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { DEBUG(KERN_ERR "cannot find register resource 0\n"); return -EINVAL; } dev->regs_res = request_mem_region(res->start, resource_size(res), dev_name(&pdev->dev)); if (!dev->regs_res) { DEBUG(KERN_ERR "cannot reserve registers\n"); return -ENOENT; } dev->regs = ioremap(res->start, resource_size(res)); if (!dev->regs) { DEBUG(KERN_ERR "cannot map registers\n"); retval = -ENXIO; goto err_regs_res; } udc_reinit(dev); wake_lock_init(&dev->usbd_wake_lock, WAKE_LOCK_SUSPEND, "usb device wake lock"); wake_lock_init(&dev->usb_cb_wake_lock, WAKE_LOCK_SUSPEND, "usb cb wake lock"); /* irq setup after old hardware state is cleaned up */ irq = platform_get_irq(pdev, 0); retval = request_irq(irq, s3c_udc_irq, 0, driver_name, dev); if (retval != 0) { DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name, dev->irq, retval); retval = -EBUSY; goto err_regs; } dev->irq = irq; disable_irq(dev->irq); dev->clk = clk_get(&pdev->dev, "usbotg"); if (IS_ERR(dev->clk)) { dev_err(&pdev->dev, "Failed to get clock\n"); goto err_irq; } dev->usb_ctrl = dma_alloc_coherent(&pdev->dev, sizeof(struct usb_ctrlrequest)*BACK2BACK_SIZE, &dev->usb_ctrl_dma, GFP_KERNEL); if (!dev->usb_ctrl) { DEBUG(KERN_ERR "%s: can't get usb_ctrl dma memory\n", driver_name); retval = -ENOMEM; goto err_clk; } create_proc_files(); INIT_DELAYED_WORK(&dev->usb_ready_work, usb_ready); schedule_delayed_work(&dev->usb_ready_work, msecs_to_jiffies(15000)); mutex_init(&dev->mutex); return retval; err_clk: clk_put(dev->clk); err_irq: free_irq(dev->irq, dev); err_regs: iounmap(dev->regs); err_regs_res: release_resource(dev->regs_res); kfree(dev->regs_res); 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); remove_proc_files(); usb_gadget_unregister_driver(dev->driver); clk_put(dev->clk); if (dev->usb_ctrl) dma_free_coherent(&pdev->dev, sizeof(struct usb_ctrlrequest)*BACK2BACK_SIZE, dev->usb_ctrl, dev->usb_ctrl_dma); free_irq(dev->irq, dev); iounmap(dev->regs); release_resource(dev->regs_res); kfree(dev->regs_res); platform_set_drvdata(pdev, 0); the_controller = 0; wake_lock_destroy(&dev->usbd_wake_lock); wake_lock_destroy(&dev->usb_cb_wake_lock); cancel_delayed_work(&dev->usb_ready_work); mutex_destroy(&dev->mutex); return 0; } #ifdef CONFIG_PM static int s3c_udc_suspend(struct platform_device *pdev, pm_message_t state) { struct s3c_udc *dev = the_controller; int i; if (dev->driver) { if (dev->driver->suspend) dev->driver->suspend(&dev->gadget); /* Terminate any outstanding requests */ for (i = 0; i < S3C_MAX_ENDPOINTS; i++) { struct s3c_ep *ep = &dev->ep[i]; if (ep->dev != NULL) spin_lock(&ep->dev->lock); ep->stopped = 1; nuke(ep, -ESHUTDOWN); if (ep->dev != NULL) spin_unlock(&ep->dev->lock); } if (dev->driver->disconnect) dev->driver->disconnect(&dev->gadget); #if defined(CONFIG_USB_EXYNOS_SWITCH) || defined(CONFIG_MFD_MAX77693)\ || defined(CONFIG_MFD_MAX8997) || defined(CONFIG_MFD_MAX77686) /* Nothing to do */ #else udc_disable(dev); #endif } return 0; } static int s3c_udc_resume(struct platform_device *pdev) { struct s3c_udc *dev = the_controller; if (dev->driver) { udc_reinit(dev); #if defined(CONFIG_USB_EXYNOS_SWITCH) || defined(CONFIG_MFD_MAX77693)\ || defined(CONFIG_MFD_MAX8997) || defined(CONFIG_MFD_MAX77686) /* Nothing to do */ #else udc_enable(dev); #endif if (dev->driver->resume) dev->driver->resume(&dev->gadget); } 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\n", driver_name, DRIVER_DESC, driver_name, DRIVER_VERSION); 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");