| /* |
| * Intel Langwell USB Device Controller driver |
| * Copyright (C) 2008-2009, Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| */ |
| |
| |
| /* #undef DEBUG */ |
| /* #undef VERBOSE_DEBUG */ |
| |
| #if defined(CONFIG_USB_LANGWELL_OTG) |
| #define OTG_TRANSCEIVER |
| #endif |
| |
| |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/ioport.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/timer.h> |
| #include <linux/list.h> |
| #include <linux/interrupt.h> |
| #include <linux/moduleparam.h> |
| #include <linux/device.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| #include <linux/usb/otg.h> |
| #include <linux/pm.h> |
| #include <linux/io.h> |
| #include <linux/irq.h> |
| #include <asm/system.h> |
| #include <asm/unaligned.h> |
| |
| #include "langwell_udc.h" |
| |
| |
| #define DRIVER_DESC "Intel Langwell USB Device Controller driver" |
| #define DRIVER_VERSION "16 May 2009" |
| |
| static const char driver_name[] = "langwell_udc"; |
| static const char driver_desc[] = DRIVER_DESC; |
| |
| |
| /* for endpoint 0 operations */ |
| static const struct usb_endpoint_descriptor |
| langwell_ep0_desc = { |
| .bLength = USB_DT_ENDPOINT_SIZE, |
| .bDescriptorType = USB_DT_ENDPOINT, |
| .bEndpointAddress = 0, |
| .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
| .wMaxPacketSize = EP0_MAX_PKT_SIZE, |
| }; |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| /* debugging */ |
| |
| #ifdef VERBOSE_DEBUG |
| static inline void print_all_registers(struct langwell_udc *dev) |
| { |
| int i; |
| |
| /* Capability Registers */ |
| dev_dbg(&dev->pdev->dev, |
| "Capability Registers (offset: 0x%04x, length: 0x%08x)\n", |
| CAP_REG_OFFSET, (u32)sizeof(struct langwell_cap_regs)); |
| dev_dbg(&dev->pdev->dev, "caplength=0x%02x\n", |
| readb(&dev->cap_regs->caplength)); |
| dev_dbg(&dev->pdev->dev, "hciversion=0x%04x\n", |
| readw(&dev->cap_regs->hciversion)); |
| dev_dbg(&dev->pdev->dev, "hcsparams=0x%08x\n", |
| readl(&dev->cap_regs->hcsparams)); |
| dev_dbg(&dev->pdev->dev, "hccparams=0x%08x\n", |
| readl(&dev->cap_regs->hccparams)); |
| dev_dbg(&dev->pdev->dev, "dciversion=0x%04x\n", |
| readw(&dev->cap_regs->dciversion)); |
| dev_dbg(&dev->pdev->dev, "dccparams=0x%08x\n", |
| readl(&dev->cap_regs->dccparams)); |
| |
| /* Operational Registers */ |
| dev_dbg(&dev->pdev->dev, |
| "Operational Registers (offset: 0x%04x, length: 0x%08x)\n", |
| OP_REG_OFFSET, (u32)sizeof(struct langwell_op_regs)); |
| dev_dbg(&dev->pdev->dev, "extsts=0x%08x\n", |
| readl(&dev->op_regs->extsts)); |
| dev_dbg(&dev->pdev->dev, "extintr=0x%08x\n", |
| readl(&dev->op_regs->extintr)); |
| dev_dbg(&dev->pdev->dev, "usbcmd=0x%08x\n", |
| readl(&dev->op_regs->usbcmd)); |
| dev_dbg(&dev->pdev->dev, "usbsts=0x%08x\n", |
| readl(&dev->op_regs->usbsts)); |
| dev_dbg(&dev->pdev->dev, "usbintr=0x%08x\n", |
| readl(&dev->op_regs->usbintr)); |
| dev_dbg(&dev->pdev->dev, "frindex=0x%08x\n", |
| readl(&dev->op_regs->frindex)); |
| dev_dbg(&dev->pdev->dev, "ctrldssegment=0x%08x\n", |
| readl(&dev->op_regs->ctrldssegment)); |
| dev_dbg(&dev->pdev->dev, "deviceaddr=0x%08x\n", |
| readl(&dev->op_regs->deviceaddr)); |
| dev_dbg(&dev->pdev->dev, "endpointlistaddr=0x%08x\n", |
| readl(&dev->op_regs->endpointlistaddr)); |
| dev_dbg(&dev->pdev->dev, "ttctrl=0x%08x\n", |
| readl(&dev->op_regs->ttctrl)); |
| dev_dbg(&dev->pdev->dev, "burstsize=0x%08x\n", |
| readl(&dev->op_regs->burstsize)); |
| dev_dbg(&dev->pdev->dev, "txfilltuning=0x%08x\n", |
| readl(&dev->op_regs->txfilltuning)); |
| dev_dbg(&dev->pdev->dev, "txttfilltuning=0x%08x\n", |
| readl(&dev->op_regs->txttfilltuning)); |
| dev_dbg(&dev->pdev->dev, "ic_usb=0x%08x\n", |
| readl(&dev->op_regs->ic_usb)); |
| dev_dbg(&dev->pdev->dev, "ulpi_viewport=0x%08x\n", |
| readl(&dev->op_regs->ulpi_viewport)); |
| dev_dbg(&dev->pdev->dev, "configflag=0x%08x\n", |
| readl(&dev->op_regs->configflag)); |
| dev_dbg(&dev->pdev->dev, "portsc1=0x%08x\n", |
| readl(&dev->op_regs->portsc1)); |
| dev_dbg(&dev->pdev->dev, "devlc=0x%08x\n", |
| readl(&dev->op_regs->devlc)); |
| dev_dbg(&dev->pdev->dev, "otgsc=0x%08x\n", |
| readl(&dev->op_regs->otgsc)); |
| dev_dbg(&dev->pdev->dev, "usbmode=0x%08x\n", |
| readl(&dev->op_regs->usbmode)); |
| dev_dbg(&dev->pdev->dev, "endptnak=0x%08x\n", |
| readl(&dev->op_regs->endptnak)); |
| dev_dbg(&dev->pdev->dev, "endptnaken=0x%08x\n", |
| readl(&dev->op_regs->endptnaken)); |
| dev_dbg(&dev->pdev->dev, "endptsetupstat=0x%08x\n", |
| readl(&dev->op_regs->endptsetupstat)); |
| dev_dbg(&dev->pdev->dev, "endptprime=0x%08x\n", |
| readl(&dev->op_regs->endptprime)); |
| dev_dbg(&dev->pdev->dev, "endptflush=0x%08x\n", |
| readl(&dev->op_regs->endptflush)); |
| dev_dbg(&dev->pdev->dev, "endptstat=0x%08x\n", |
| readl(&dev->op_regs->endptstat)); |
| dev_dbg(&dev->pdev->dev, "endptcomplete=0x%08x\n", |
| readl(&dev->op_regs->endptcomplete)); |
| |
| for (i = 0; i < dev->ep_max / 2; i++) { |
| dev_dbg(&dev->pdev->dev, "endptctrl[%d]=0x%08x\n", |
| i, readl(&dev->op_regs->endptctrl[i])); |
| } |
| } |
| #else |
| |
| #define print_all_registers(dev) do { } while (0) |
| |
| #endif /* VERBOSE_DEBUG */ |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| #define is_in(ep) (((ep)->ep_num == 0) ? ((ep)->dev->ep0_dir == \ |
| USB_DIR_IN) : (usb_endpoint_dir_in((ep)->desc))) |
| |
| #define DIR_STRING(ep) (is_in(ep) ? "in" : "out") |
| |
| |
| static char *type_string(const struct usb_endpoint_descriptor *desc) |
| { |
| switch (usb_endpoint_type(desc)) { |
| case USB_ENDPOINT_XFER_BULK: |
| return "bulk"; |
| case USB_ENDPOINT_XFER_ISOC: |
| return "iso"; |
| case USB_ENDPOINT_XFER_INT: |
| return "int"; |
| }; |
| |
| return "control"; |
| } |
| |
| |
| /* configure endpoint control registers */ |
| static void ep_reset(struct langwell_ep *ep, unsigned char ep_num, |
| unsigned char is_in, unsigned char ep_type) |
| { |
| struct langwell_udc *dev; |
| u32 endptctrl; |
| |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| if (is_in) { /* TX */ |
| if (ep_num) |
| endptctrl |= EPCTRL_TXR; |
| endptctrl |= EPCTRL_TXE; |
| endptctrl |= ep_type << EPCTRL_TXT_SHIFT; |
| } else { /* RX */ |
| if (ep_num) |
| endptctrl |= EPCTRL_RXR; |
| endptctrl |= EPCTRL_RXE; |
| endptctrl |= ep_type << EPCTRL_RXT_SHIFT; |
| } |
| |
| writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* reset ep0 dQH and endptctrl */ |
| static void ep0_reset(struct langwell_udc *dev) |
| { |
| struct langwell_ep *ep; |
| int i; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* ep0 in and out */ |
| for (i = 0; i < 2; i++) { |
| ep = &dev->ep[i]; |
| ep->dev = dev; |
| |
| /* ep0 dQH */ |
| ep->dqh = &dev->ep_dqh[i]; |
| |
| /* configure ep0 endpoint capabilities in dQH */ |
| ep->dqh->dqh_ios = 1; |
| ep->dqh->dqh_mpl = EP0_MAX_PKT_SIZE; |
| |
| /* enable ep0-in HW zero length termination select */ |
| if (is_in(ep)) |
| ep->dqh->dqh_zlt = 0; |
| ep->dqh->dqh_mult = 0; |
| |
| ep->dqh->dtd_next = DTD_TERM; |
| |
| /* configure ep0 control registers */ |
| ep_reset(&dev->ep[0], 0, i, USB_ENDPOINT_XFER_CONTROL); |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* endpoints operations */ |
| |
| /* configure endpoint, making it usable */ |
| static int langwell_ep_enable(struct usb_ep *_ep, |
| const struct usb_endpoint_descriptor *desc) |
| { |
| struct langwell_udc *dev; |
| struct langwell_ep *ep; |
| u16 max = 0; |
| unsigned long flags; |
| int i, retval = 0; |
| unsigned char zlt, ios = 0, mult = 0; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !desc || ep->desc |
| || desc->bDescriptorType != USB_DT_ENDPOINT) |
| return -EINVAL; |
| |
| if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| max = usb_endpoint_maxp(desc); |
| |
| /* |
| * disable HW zero length termination select |
| * driver handles zero length packet through req->req.zero |
| */ |
| zlt = 1; |
| |
| /* |
| * sanity check type, direction, address, and then |
| * initialize the endpoint capabilities fields in dQH |
| */ |
| switch (usb_endpoint_type(desc)) { |
| case USB_ENDPOINT_XFER_CONTROL: |
| ios = 1; |
| break; |
| case USB_ENDPOINT_XFER_BULK: |
| if ((dev->gadget.speed == USB_SPEED_HIGH |
| && max != 512) |
| || (dev->gadget.speed == USB_SPEED_FULL |
| && max > 64)) { |
| goto done; |
| } |
| break; |
| case USB_ENDPOINT_XFER_INT: |
| if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
| goto done; |
| |
| switch (dev->gadget.speed) { |
| case USB_SPEED_HIGH: |
| if (max <= 1024) |
| break; |
| case USB_SPEED_FULL: |
| if (max <= 64) |
| break; |
| default: |
| if (max <= 8) |
| break; |
| goto done; |
| } |
| break; |
| case USB_ENDPOINT_XFER_ISOC: |
| if (strstr(ep->ep.name, "-bulk") |
| || strstr(ep->ep.name, "-int")) |
| goto done; |
| |
| switch (dev->gadget.speed) { |
| case USB_SPEED_HIGH: |
| if (max <= 1024) |
| break; |
| case USB_SPEED_FULL: |
| if (max <= 1023) |
| break; |
| default: |
| goto done; |
| } |
| /* |
| * FIXME: |
| * calculate transactions needed for high bandwidth iso |
| */ |
| mult = (unsigned char)(1 + ((max >> 11) & 0x03)); |
| max = max & 0x8ff; /* bit 0~10 */ |
| /* 3 transactions at most */ |
| if (mult > 3) |
| goto done; |
| break; |
| default: |
| goto done; |
| } |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| ep->ep.maxpacket = max; |
| ep->desc = desc; |
| ep->stopped = 0; |
| ep->ep_num = usb_endpoint_num(desc); |
| |
| /* ep_type */ |
| ep->ep_type = usb_endpoint_type(desc); |
| |
| /* configure endpoint control registers */ |
| ep_reset(ep, ep->ep_num, is_in(ep), ep->ep_type); |
| |
| /* configure endpoint capabilities in dQH */ |
| i = ep->ep_num * 2 + is_in(ep); |
| ep->dqh = &dev->ep_dqh[i]; |
| ep->dqh->dqh_ios = ios; |
| ep->dqh->dqh_mpl = cpu_to_le16(max); |
| ep->dqh->dqh_zlt = zlt; |
| ep->dqh->dqh_mult = mult; |
| ep->dqh->dtd_next = DTD_TERM; |
| |
| dev_dbg(&dev->pdev->dev, "enabled %s (ep%d%s-%s), max %04x\n", |
| _ep->name, |
| ep->ep_num, |
| DIR_STRING(ep), |
| type_string(desc), |
| max); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| done: |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return retval; |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* retire a request */ |
| static void done(struct langwell_ep *ep, struct langwell_request *req, |
| int status) |
| { |
| struct langwell_udc *dev = ep->dev; |
| unsigned stopped = ep->stopped; |
| struct langwell_dtd *curr_dtd, *next_dtd; |
| int i; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* remove the req from ep->queue */ |
| list_del_init(&req->queue); |
| |
| if (req->req.status == -EINPROGRESS) |
| req->req.status = status; |
| else |
| status = req->req.status; |
| |
| /* free dTD for the request */ |
| next_dtd = req->head; |
| for (i = 0; i < req->dtd_count; i++) { |
| curr_dtd = next_dtd; |
| if (i != req->dtd_count - 1) |
| next_dtd = curr_dtd->next_dtd_virt; |
| dma_pool_free(dev->dtd_pool, curr_dtd, curr_dtd->dtd_dma); |
| } |
| |
| if (req->mapped) { |
| dma_unmap_single(&dev->pdev->dev, |
| req->req.dma, req->req.length, |
| is_in(ep) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
| req->req.dma = DMA_ADDR_INVALID; |
| req->mapped = 0; |
| } else |
| dma_sync_single_for_cpu(&dev->pdev->dev, req->req.dma, |
| req->req.length, |
| is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| |
| if (status != -ESHUTDOWN) |
| dev_dbg(&dev->pdev->dev, |
| "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(&dev->lock); |
| /* complete routine from gadget driver */ |
| if (req->req.complete) |
| req->req.complete(&ep->ep, &req->req); |
| |
| spin_lock(&dev->lock); |
| ep->stopped = stopped; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| static void langwell_ep_fifo_flush(struct usb_ep *_ep); |
| |
| /* delete all endpoint requests, called with spinlock held */ |
| static void nuke(struct langwell_ep *ep, int status) |
| { |
| /* called with spinlock held */ |
| ep->stopped = 1; |
| |
| /* endpoint fifo flush */ |
| if (&ep->ep && ep->desc) |
| langwell_ep_fifo_flush(&ep->ep); |
| |
| while (!list_empty(&ep->queue)) { |
| struct langwell_request *req = NULL; |
| req = list_entry(ep->queue.next, struct langwell_request, |
| queue); |
| done(ep, req, status); |
| } |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* endpoint is no longer usable */ |
| static int langwell_ep_disable(struct usb_ep *_ep) |
| { |
| struct langwell_ep *ep; |
| unsigned long flags; |
| struct langwell_udc *dev; |
| int ep_num; |
| u32 endptctrl; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !ep->desc) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* disable endpoint control register */ |
| ep_num = ep->ep_num; |
| endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| if (is_in(ep)) |
| endptctrl &= ~EPCTRL_TXE; |
| else |
| endptctrl &= ~EPCTRL_RXE; |
| writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| |
| /* nuke all pending requests (does flush) */ |
| nuke(ep, -ESHUTDOWN); |
| |
| ep->desc = NULL; |
| ep->stopped = 1; |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_dbg(&dev->pdev->dev, "disabled %s\n", _ep->name); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| |
| return 0; |
| } |
| |
| |
| /* allocate a request object to use with this endpoint */ |
| static struct usb_request *langwell_alloc_request(struct usb_ep *_ep, |
| gfp_t gfp_flags) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| struct langwell_request *req = NULL; |
| |
| if (!_ep) |
| return NULL; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| req = kzalloc(sizeof(*req), gfp_flags); |
| if (!req) |
| return NULL; |
| |
| req->req.dma = DMA_ADDR_INVALID; |
| INIT_LIST_HEAD(&req->queue); |
| |
| dev_vdbg(&dev->pdev->dev, "alloc request for %s\n", _ep->name); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return &req->req; |
| } |
| |
| |
| /* free a request object */ |
| static void langwell_free_request(struct usb_ep *_ep, |
| struct usb_request *_req) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| struct langwell_request *req = NULL; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !_req) |
| return; |
| |
| req = container_of(_req, struct langwell_request, req); |
| WARN_ON(!list_empty(&req->queue)); |
| |
| if (_req) |
| kfree(req); |
| |
| dev_vdbg(&dev->pdev->dev, "free request for %s\n", _ep->name); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* queue dTD and PRIME endpoint */ |
| static int queue_dtd(struct langwell_ep *ep, struct langwell_request *req) |
| { |
| u32 bit_mask, usbcmd, endptstat, dtd_dma; |
| u8 dtd_status; |
| int i; |
| struct langwell_dqh *dqh; |
| struct langwell_udc *dev; |
| |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| i = ep->ep_num * 2 + is_in(ep); |
| dqh = &dev->ep_dqh[i]; |
| |
| if (ep->ep_num) |
| dev_vdbg(&dev->pdev->dev, "%s\n", ep->name); |
| else |
| /* ep0 */ |
| dev_vdbg(&dev->pdev->dev, "%s-%s\n", ep->name, DIR_STRING(ep)); |
| |
| dev_vdbg(&dev->pdev->dev, "ep_dqh[%d] addr: 0x%p\n", |
| i, &(dev->ep_dqh[i])); |
| |
| bit_mask = is_in(ep) ? |
| (1 << (ep->ep_num + 16)) : (1 << (ep->ep_num)); |
| |
| dev_vdbg(&dev->pdev->dev, "bit_mask = 0x%08x\n", bit_mask); |
| |
| /* check if the pipe is empty */ |
| if (!(list_empty(&ep->queue))) { |
| /* add dTD to the end of linked list */ |
| struct langwell_request *lastreq; |
| lastreq = list_entry(ep->queue.prev, |
| struct langwell_request, queue); |
| |
| lastreq->tail->dtd_next = |
| cpu_to_le32(req->head->dtd_dma & DTD_NEXT_MASK); |
| |
| /* read prime bit, if 1 goto out */ |
| if (readl(&dev->op_regs->endptprime) & bit_mask) |
| goto out; |
| |
| do { |
| /* set ATDTW bit in USBCMD */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| writel(usbcmd | CMD_ATDTW, &dev->op_regs->usbcmd); |
| |
| /* read correct status bit */ |
| endptstat = readl(&dev->op_regs->endptstat) & bit_mask; |
| |
| } while (!(readl(&dev->op_regs->usbcmd) & CMD_ATDTW)); |
| |
| /* write ATDTW bit to 0 */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| writel(usbcmd & ~CMD_ATDTW, &dev->op_regs->usbcmd); |
| |
| if (endptstat) |
| goto out; |
| } |
| |
| /* write dQH next pointer and terminate bit to 0 */ |
| dtd_dma = req->head->dtd_dma & DTD_NEXT_MASK; |
| dqh->dtd_next = cpu_to_le32(dtd_dma); |
| |
| /* clear active and halt bit */ |
| dtd_status = (u8) ~(DTD_STS_ACTIVE | DTD_STS_HALTED); |
| dqh->dtd_status &= dtd_status; |
| dev_vdbg(&dev->pdev->dev, "dqh->dtd_status = 0x%x\n", dqh->dtd_status); |
| |
| /* ensure that updates to the dQH will occur before priming */ |
| wmb(); |
| |
| /* write 1 to endptprime register to PRIME endpoint */ |
| bit_mask = is_in(ep) ? (1 << (ep->ep_num + 16)) : (1 << ep->ep_num); |
| dev_vdbg(&dev->pdev->dev, "endprime bit_mask = 0x%08x\n", bit_mask); |
| writel(bit_mask, &dev->op_regs->endptprime); |
| out: |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* fill in the dTD structure to build a transfer descriptor */ |
| static struct langwell_dtd *build_dtd(struct langwell_request *req, |
| unsigned *length, dma_addr_t *dma, int *is_last) |
| { |
| u32 buf_ptr; |
| struct langwell_dtd *dtd; |
| struct langwell_udc *dev; |
| int i; |
| |
| dev = req->ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* the maximum transfer length, up to 16k bytes */ |
| *length = min(req->req.length - req->req.actual, |
| (unsigned)DTD_MAX_TRANSFER_LENGTH); |
| |
| /* create dTD dma_pool resource */ |
| dtd = dma_pool_alloc(dev->dtd_pool, GFP_KERNEL, dma); |
| if (dtd == NULL) |
| return dtd; |
| dtd->dtd_dma = *dma; |
| |
| /* initialize buffer page pointers */ |
| buf_ptr = (u32)(req->req.dma + req->req.actual); |
| for (i = 0; i < 5; i++) |
| dtd->dtd_buf[i] = cpu_to_le32(buf_ptr + i * PAGE_SIZE); |
| |
| req->req.actual += *length; |
| |
| /* fill in total bytes with transfer size */ |
| dtd->dtd_total = cpu_to_le16(*length); |
| dev_vdbg(&dev->pdev->dev, "dtd->dtd_total = %d\n", dtd->dtd_total); |
| |
| /* set is_last flag if req->req.zero is set or not */ |
| if (req->req.zero) { |
| if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) |
| *is_last = 1; |
| else |
| *is_last = 0; |
| } else if (req->req.length == req->req.actual) { |
| *is_last = 1; |
| } else |
| *is_last = 0; |
| |
| if (*is_last == 0) |
| dev_vdbg(&dev->pdev->dev, "multi-dtd request!\n"); |
| |
| /* set interrupt on complete bit for the last dTD */ |
| if (*is_last && !req->req.no_interrupt) |
| dtd->dtd_ioc = 1; |
| |
| /* set multiplier override 0 for non-ISO and non-TX endpoint */ |
| dtd->dtd_multo = 0; |
| |
| /* set the active bit of status field to 1 */ |
| dtd->dtd_status = DTD_STS_ACTIVE; |
| dev_vdbg(&dev->pdev->dev, "dtd->dtd_status = 0x%02x\n", |
| dtd->dtd_status); |
| |
| dev_vdbg(&dev->pdev->dev, "length = %d, dma addr= 0x%08x\n", |
| *length, (int)*dma); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return dtd; |
| } |
| |
| |
| /* generate dTD linked list for a request */ |
| static int req_to_dtd(struct langwell_request *req) |
| { |
| unsigned count; |
| int is_last, is_first = 1; |
| struct langwell_dtd *dtd, *last_dtd = NULL; |
| struct langwell_udc *dev; |
| dma_addr_t dma; |
| |
| dev = req->ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| do { |
| dtd = build_dtd(req, &count, &dma, &is_last); |
| if (dtd == NULL) |
| return -ENOMEM; |
| |
| if (is_first) { |
| is_first = 0; |
| req->head = dtd; |
| } else { |
| last_dtd->dtd_next = cpu_to_le32(dma); |
| last_dtd->next_dtd_virt = dtd; |
| } |
| last_dtd = dtd; |
| req->dtd_count++; |
| } while (!is_last); |
| |
| /* set terminate bit to 1 for the last dTD */ |
| dtd->dtd_next = DTD_TERM; |
| |
| req->tail = dtd; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* queue (submits) an I/O requests to an endpoint */ |
| static int langwell_ep_queue(struct usb_ep *_ep, struct usb_request *_req, |
| gfp_t gfp_flags) |
| { |
| struct langwell_request *req; |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| unsigned long flags; |
| int is_iso = 0, zlflag = 0; |
| |
| /* always require a cpu-view buffer */ |
| req = container_of(_req, struct langwell_request, req); |
| ep = container_of(_ep, struct langwell_ep, ep); |
| |
| if (!_req || !_req->complete || !_req->buf |
| || !list_empty(&req->queue)) { |
| return -EINVAL; |
| } |
| |
| if (unlikely(!_ep || !ep->desc)) |
| return -EINVAL; |
| |
| dev = ep->dev; |
| req->ep = ep; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (usb_endpoint_xfer_isoc(ep->desc)) { |
| if (req->req.length > ep->ep.maxpacket) |
| return -EMSGSIZE; |
| is_iso = 1; |
| } |
| |
| if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) |
| return -ESHUTDOWN; |
| |
| /* set up dma mapping in case the caller didn't */ |
| if (_req->dma == DMA_ADDR_INVALID) { |
| /* WORKAROUND: WARN_ON(size == 0) */ |
| if (_req->length == 0) { |
| dev_vdbg(&dev->pdev->dev, "req->length: 0->1\n"); |
| zlflag = 1; |
| _req->length++; |
| } |
| |
| _req->dma = dma_map_single(&dev->pdev->dev, |
| _req->buf, _req->length, |
| is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| if (zlflag && (_req->length == 1)) { |
| dev_vdbg(&dev->pdev->dev, "req->length: 1->0\n"); |
| zlflag = 0; |
| _req->length = 0; |
| } |
| |
| req->mapped = 1; |
| dev_vdbg(&dev->pdev->dev, "req->mapped = 1\n"); |
| } else { |
| dma_sync_single_for_device(&dev->pdev->dev, |
| _req->dma, _req->length, |
| is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| req->mapped = 0; |
| dev_vdbg(&dev->pdev->dev, "req->mapped = 0\n"); |
| } |
| |
| dev_dbg(&dev->pdev->dev, |
| "%s queue req %p, len %u, buf %p, dma 0x%08x\n", |
| _ep->name, |
| _req, _req->length, _req->buf, (int)_req->dma); |
| |
| _req->status = -EINPROGRESS; |
| _req->actual = 0; |
| req->dtd_count = 0; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* build and put dTDs to endpoint queue */ |
| if (!req_to_dtd(req)) { |
| queue_dtd(ep, req); |
| } else { |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return -ENOMEM; |
| } |
| |
| /* update ep0 state */ |
| if (ep->ep_num == 0) |
| dev->ep0_state = DATA_STATE_XMIT; |
| |
| if (likely(req != NULL)) { |
| list_add_tail(&req->queue, &ep->queue); |
| dev_vdbg(&dev->pdev->dev, "list_add_tail()\n"); |
| } |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* dequeue (cancels, unlinks) an I/O request from an endpoint */ |
| static int langwell_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| struct langwell_request *req; |
| unsigned long flags; |
| int stopped, ep_num, retval = 0; |
| u32 endptctrl; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !ep->desc || !_req) |
| return -EINVAL; |
| |
| if (!dev->driver) |
| return -ESHUTDOWN; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| stopped = ep->stopped; |
| |
| /* quiesce dma while we patch the queue */ |
| ep->stopped = 1; |
| ep_num = ep->ep_num; |
| |
| /* disable endpoint control register */ |
| endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| if (is_in(ep)) |
| endptctrl &= ~EPCTRL_TXE; |
| else |
| endptctrl &= ~EPCTRL_RXE; |
| writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| |
| /* make sure it's still queued on this endpoint */ |
| list_for_each_entry(req, &ep->queue, queue) { |
| if (&req->req == _req) |
| break; |
| } |
| |
| if (&req->req != _req) { |
| retval = -EINVAL; |
| goto done; |
| } |
| |
| /* queue head may be partially complete. */ |
| if (ep->queue.next == &req->queue) { |
| dev_dbg(&dev->pdev->dev, "unlink (%s) dma\n", _ep->name); |
| _req->status = -ECONNRESET; |
| langwell_ep_fifo_flush(&ep->ep); |
| |
| /* not the last request in endpoint queue */ |
| if (likely(ep->queue.next == &req->queue)) { |
| struct langwell_dqh *dqh; |
| struct langwell_request *next_req; |
| |
| dqh = ep->dqh; |
| next_req = list_entry(req->queue.next, |
| struct langwell_request, queue); |
| |
| /* point the dQH to the first dTD of next request */ |
| writel((u32) next_req->head, &dqh->dqh_current); |
| } |
| } else { |
| struct langwell_request *prev_req; |
| |
| prev_req = list_entry(req->queue.prev, |
| struct langwell_request, queue); |
| writel(readl(&req->tail->dtd_next), |
| &prev_req->tail->dtd_next); |
| } |
| |
| done(ep, req, -ECONNRESET); |
| |
| done: |
| /* enable endpoint again */ |
| endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| if (is_in(ep)) |
| endptctrl |= EPCTRL_TXE; |
| else |
| endptctrl |= EPCTRL_RXE; |
| writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| |
| ep->stopped = stopped; |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return retval; |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* endpoint set/clear halt */ |
| static void ep_set_halt(struct langwell_ep *ep, int value) |
| { |
| u32 endptctrl = 0; |
| int ep_num; |
| struct langwell_udc *dev = ep->dev; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| ep_num = ep->ep_num; |
| endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| |
| /* value: 1 - set halt, 0 - clear halt */ |
| if (value) { |
| /* set the stall bit */ |
| if (is_in(ep)) |
| endptctrl |= EPCTRL_TXS; |
| else |
| endptctrl |= EPCTRL_RXS; |
| } else { |
| /* clear the stall bit and reset data toggle */ |
| if (is_in(ep)) { |
| endptctrl &= ~EPCTRL_TXS; |
| endptctrl |= EPCTRL_TXR; |
| } else { |
| endptctrl &= ~EPCTRL_RXS; |
| endptctrl |= EPCTRL_RXR; |
| } |
| } |
| |
| writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* set the endpoint halt feature */ |
| static int langwell_ep_set_halt(struct usb_ep *_ep, int value) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| unsigned long flags; |
| int retval = 0; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !ep->desc) |
| return -EINVAL; |
| |
| if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| if (usb_endpoint_xfer_isoc(ep->desc)) |
| return -EOPNOTSUPP; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* |
| * attempt to halt IN ep will fail if any transfer requests |
| * are still queue |
| */ |
| if (!list_empty(&ep->queue) && is_in(ep) && value) { |
| /* IN endpoint FIFO holds bytes */ |
| dev_dbg(&dev->pdev->dev, "%s FIFO holds bytes\n", _ep->name); |
| retval = -EAGAIN; |
| goto done; |
| } |
| |
| /* endpoint set/clear halt */ |
| if (ep->ep_num) { |
| ep_set_halt(ep, value); |
| } else { /* endpoint 0 */ |
| dev->ep0_state = WAIT_FOR_SETUP; |
| dev->ep0_dir = USB_DIR_OUT; |
| } |
| done: |
| spin_unlock_irqrestore(&dev->lock, flags); |
| dev_dbg(&dev->pdev->dev, "%s %s halt\n", |
| _ep->name, value ? "set" : "clear"); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return retval; |
| } |
| |
| |
| /* set the halt feature and ignores clear requests */ |
| static int langwell_ep_set_wedge(struct usb_ep *_ep) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !ep->desc) |
| return -EINVAL; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return usb_ep_set_halt(_ep); |
| } |
| |
| |
| /* flush contents of a fifo */ |
| static void langwell_ep_fifo_flush(struct usb_ep *_ep) |
| { |
| struct langwell_ep *ep; |
| struct langwell_udc *dev; |
| u32 flush_bit; |
| unsigned long timeout; |
| |
| ep = container_of(_ep, struct langwell_ep, ep); |
| dev = ep->dev; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (!_ep || !ep->desc) { |
| dev_vdbg(&dev->pdev->dev, "ep or ep->desc is NULL\n"); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return; |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "%s-%s fifo flush\n", |
| _ep->name, DIR_STRING(ep)); |
| |
| /* flush endpoint buffer */ |
| if (ep->ep_num == 0) |
| flush_bit = (1 << 16) | 1; |
| else if (is_in(ep)) |
| flush_bit = 1 << (ep->ep_num + 16); /* TX */ |
| else |
| flush_bit = 1 << ep->ep_num; /* RX */ |
| |
| /* wait until flush complete */ |
| timeout = jiffies + FLUSH_TIMEOUT; |
| do { |
| writel(flush_bit, &dev->op_regs->endptflush); |
| while (readl(&dev->op_regs->endptflush)) { |
| if (time_after(jiffies, timeout)) { |
| dev_err(&dev->pdev->dev, "ep flush timeout\n"); |
| goto done; |
| } |
| cpu_relax(); |
| } |
| } while (readl(&dev->op_regs->endptstat) & flush_bit); |
| done: |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* endpoints operations structure */ |
| static const struct usb_ep_ops langwell_ep_ops = { |
| |
| /* configure endpoint, making it usable */ |
| .enable = langwell_ep_enable, |
| |
| /* endpoint is no longer usable */ |
| .disable = langwell_ep_disable, |
| |
| /* allocate a request object to use with this endpoint */ |
| .alloc_request = langwell_alloc_request, |
| |
| /* free a request object */ |
| .free_request = langwell_free_request, |
| |
| /* queue (submits) an I/O requests to an endpoint */ |
| .queue = langwell_ep_queue, |
| |
| /* dequeue (cancels, unlinks) an I/O request from an endpoint */ |
| .dequeue = langwell_ep_dequeue, |
| |
| /* set the endpoint halt feature */ |
| .set_halt = langwell_ep_set_halt, |
| |
| /* set the halt feature and ignores clear requests */ |
| .set_wedge = langwell_ep_set_wedge, |
| |
| /* flush contents of a fifo */ |
| .fifo_flush = langwell_ep_fifo_flush, |
| }; |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* device controller usb_gadget_ops structure */ |
| |
| /* returns the current frame number */ |
| static int langwell_get_frame(struct usb_gadget *_gadget) |
| { |
| struct langwell_udc *dev; |
| u16 retval; |
| |
| if (!_gadget) |
| return -ENODEV; |
| |
| dev = container_of(_gadget, struct langwell_udc, gadget); |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| retval = readl(&dev->op_regs->frindex) & FRINDEX_MASK; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return retval; |
| } |
| |
| |
| /* enter or exit PHY low power state */ |
| static void langwell_phy_low_power(struct langwell_udc *dev, bool flag) |
| { |
| u32 devlc; |
| u8 devlc_byte2; |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| devlc = readl(&dev->op_regs->devlc); |
| dev_vdbg(&dev->pdev->dev, "devlc = 0x%08x\n", devlc); |
| |
| if (flag) |
| devlc |= LPM_PHCD; |
| else |
| devlc &= ~LPM_PHCD; |
| |
| /* FIXME: workaround for Langwell A1/A2/A3 sighting */ |
| devlc_byte2 = (devlc >> 16) & 0xff; |
| writeb(devlc_byte2, (u8 *)&dev->op_regs->devlc + 2); |
| |
| devlc = readl(&dev->op_regs->devlc); |
| dev_vdbg(&dev->pdev->dev, |
| "%s PHY low power suspend, devlc = 0x%08x\n", |
| flag ? "enter" : "exit", devlc); |
| } |
| |
| |
| /* tries to wake up the host connected to this gadget */ |
| static int langwell_wakeup(struct usb_gadget *_gadget) |
| { |
| struct langwell_udc *dev; |
| u32 portsc1; |
| unsigned long flags; |
| |
| if (!_gadget) |
| return 0; |
| |
| dev = container_of(_gadget, struct langwell_udc, gadget); |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* remote wakeup feature not enabled by host */ |
| if (!dev->remote_wakeup) { |
| dev_info(&dev->pdev->dev, "remote wakeup is disabled\n"); |
| return -ENOTSUPP; |
| } |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| portsc1 = readl(&dev->op_regs->portsc1); |
| if (!(portsc1 & PORTS_SUSP)) { |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return 0; |
| } |
| |
| /* LPM L1 to L0 or legacy remote wakeup */ |
| if (dev->lpm && dev->lpm_state == LPM_L1) |
| dev_info(&dev->pdev->dev, "LPM L1 to L0 remote wakeup\n"); |
| else |
| dev_info(&dev->pdev->dev, "device remote wakeup\n"); |
| |
| /* exit PHY low power suspend */ |
| if (dev->pdev->device != 0x0829) |
| langwell_phy_low_power(dev, 0); |
| |
| /* force port resume */ |
| portsc1 |= PORTS_FPR; |
| writel(portsc1, &dev->op_regs->portsc1); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* notify controller that VBUS is powered or not */ |
| static int langwell_vbus_session(struct usb_gadget *_gadget, int is_active) |
| { |
| struct langwell_udc *dev; |
| unsigned long flags; |
| u32 usbcmd; |
| |
| if (!_gadget) |
| return -ENODEV; |
| |
| dev = container_of(_gadget, struct langwell_udc, gadget); |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev_vdbg(&dev->pdev->dev, "VBUS status: %s\n", |
| is_active ? "on" : "off"); |
| |
| dev->vbus_active = (is_active != 0); |
| if (dev->driver && dev->softconnected && dev->vbus_active) { |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd |= CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| } else { |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd &= ~CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| } |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* constrain controller's VBUS power usage */ |
| static int langwell_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
| { |
| struct langwell_udc *dev; |
| |
| if (!_gadget) |
| return -ENODEV; |
| |
| dev = container_of(_gadget, struct langwell_udc, gadget); |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (dev->transceiver) { |
| dev_vdbg(&dev->pdev->dev, "otg_set_power\n"); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return otg_set_power(dev->transceiver, mA); |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return -ENOTSUPP; |
| } |
| |
| |
| /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| static int langwell_pullup(struct usb_gadget *_gadget, int is_on) |
| { |
| struct langwell_udc *dev; |
| u32 usbcmd; |
| unsigned long flags; |
| |
| if (!_gadget) |
| return -ENODEV; |
| |
| dev = container_of(_gadget, struct langwell_udc, gadget); |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->softconnected = (is_on != 0); |
| |
| if (dev->driver && dev->softconnected && dev->vbus_active) { |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd |= CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| } else { |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd &= ~CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| } |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| static int langwell_start(struct usb_gadget *g, |
| struct usb_gadget_driver *driver); |
| |
| static int langwell_stop(struct usb_gadget *g, |
| struct usb_gadget_driver *driver); |
| |
| /* device controller usb_gadget_ops structure */ |
| static const struct usb_gadget_ops langwell_ops = { |
| |
| /* returns the current frame number */ |
| .get_frame = langwell_get_frame, |
| |
| /* tries to wake up the host connected to this gadget */ |
| .wakeup = langwell_wakeup, |
| |
| /* set the device selfpowered feature, always selfpowered */ |
| /* .set_selfpowered = langwell_set_selfpowered, */ |
| |
| /* notify controller that VBUS is powered or not */ |
| .vbus_session = langwell_vbus_session, |
| |
| /* constrain controller's VBUS power usage */ |
| .vbus_draw = langwell_vbus_draw, |
| |
| /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| .pullup = langwell_pullup, |
| |
| .udc_start = langwell_start, |
| .udc_stop = langwell_stop, |
| }; |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* device controller operations */ |
| |
| /* reset device controller */ |
| static int langwell_udc_reset(struct langwell_udc *dev) |
| { |
| u32 usbcmd, usbmode, devlc, endpointlistaddr; |
| u8 devlc_byte0, devlc_byte2; |
| unsigned long timeout; |
| |
| if (!dev) |
| return -EINVAL; |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* set controller to stop state */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd &= ~CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| |
| /* reset device controller */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd |= CMD_RST; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| |
| /* wait for reset to complete */ |
| timeout = jiffies + RESET_TIMEOUT; |
| while (readl(&dev->op_regs->usbcmd) & CMD_RST) { |
| if (time_after(jiffies, timeout)) { |
| dev_err(&dev->pdev->dev, "device reset timeout\n"); |
| return -ETIMEDOUT; |
| } |
| cpu_relax(); |
| } |
| |
| /* set controller to device mode */ |
| usbmode = readl(&dev->op_regs->usbmode); |
| usbmode |= MODE_DEVICE; |
| |
| /* turn setup lockout off, require setup tripwire in usbcmd */ |
| usbmode |= MODE_SLOM; |
| |
| writel(usbmode, &dev->op_regs->usbmode); |
| usbmode = readl(&dev->op_regs->usbmode); |
| dev_vdbg(&dev->pdev->dev, "usbmode=0x%08x\n", usbmode); |
| |
| /* Write-Clear setup status */ |
| writel(0, &dev->op_regs->usbsts); |
| |
| /* if support USB LPM, ACK all LPM token */ |
| if (dev->lpm) { |
| devlc = readl(&dev->op_regs->devlc); |
| dev_vdbg(&dev->pdev->dev, "devlc = 0x%08x\n", devlc); |
| /* FIXME: workaround for Langwell A1/A2/A3 sighting */ |
| devlc &= ~LPM_STL; /* don't STALL LPM token */ |
| devlc &= ~LPM_NYT_ACK; /* ACK LPM token */ |
| devlc_byte0 = devlc & 0xff; |
| devlc_byte2 = (devlc >> 16) & 0xff; |
| writeb(devlc_byte0, (u8 *)&dev->op_regs->devlc); |
| writeb(devlc_byte2, (u8 *)&dev->op_regs->devlc + 2); |
| devlc = readl(&dev->op_regs->devlc); |
| dev_vdbg(&dev->pdev->dev, |
| "ACK LPM token, devlc = 0x%08x\n", devlc); |
| } |
| |
| /* fill endpointlistaddr register */ |
| endpointlistaddr = dev->ep_dqh_dma; |
| endpointlistaddr &= ENDPOINTLISTADDR_MASK; |
| writel(endpointlistaddr, &dev->op_regs->endpointlistaddr); |
| |
| dev_vdbg(&dev->pdev->dev, |
| "dQH base (vir: %p, phy: 0x%08x), endpointlistaddr=0x%08x\n", |
| dev->ep_dqh, endpointlistaddr, |
| readl(&dev->op_regs->endpointlistaddr)); |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* reinitialize device controller endpoints */ |
| static int eps_reinit(struct langwell_udc *dev) |
| { |
| struct langwell_ep *ep; |
| char name[14]; |
| int i; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* initialize ep0 */ |
| ep = &dev->ep[0]; |
| ep->dev = dev; |
| strncpy(ep->name, "ep0", sizeof(ep->name)); |
| ep->ep.name = ep->name; |
| ep->ep.ops = &langwell_ep_ops; |
| ep->stopped = 0; |
| ep->ep.maxpacket = EP0_MAX_PKT_SIZE; |
| ep->ep_num = 0; |
| ep->desc = &langwell_ep0_desc; |
| INIT_LIST_HEAD(&ep->queue); |
| |
| ep->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| |
| /* initialize other endpoints */ |
| for (i = 2; i < dev->ep_max; i++) { |
| ep = &dev->ep[i]; |
| if (i % 2) |
| snprintf(name, sizeof(name), "ep%din", i / 2); |
| else |
| snprintf(name, sizeof(name), "ep%dout", i / 2); |
| ep->dev = dev; |
| strncpy(ep->name, name, sizeof(ep->name)); |
| ep->ep.name = ep->name; |
| |
| ep->ep.ops = &langwell_ep_ops; |
| ep->stopped = 0; |
| ep->ep.maxpacket = (unsigned short) ~0; |
| ep->ep_num = i / 2; |
| |
| INIT_LIST_HEAD(&ep->queue); |
| list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* enable interrupt and set controller to run state */ |
| static void langwell_udc_start(struct langwell_udc *dev) |
| { |
| u32 usbintr, usbcmd; |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* enable interrupts */ |
| usbintr = INTR_ULPIE /* ULPI */ |
| | INTR_SLE /* suspend */ |
| /* | INTR_SRE SOF received */ |
| | INTR_URE /* USB reset */ |
| | INTR_AAE /* async advance */ |
| | INTR_SEE /* system error */ |
| | INTR_FRE /* frame list rollover */ |
| | INTR_PCE /* port change detect */ |
| | INTR_UEE /* USB error interrupt */ |
| | INTR_UE; /* USB interrupt */ |
| writel(usbintr, &dev->op_regs->usbintr); |
| |
| /* clear stopped bit */ |
| dev->stopped = 0; |
| |
| /* set controller to run */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd |= CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* disable interrupt and set controller to stop state */ |
| static void langwell_udc_stop(struct langwell_udc *dev) |
| { |
| u32 usbcmd; |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* disable all interrupts */ |
| writel(0, &dev->op_regs->usbintr); |
| |
| /* set stopped bit */ |
| dev->stopped = 1; |
| |
| /* set controller to stop state */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| usbcmd &= ~CMD_RUNSTOP; |
| writel(usbcmd, &dev->op_regs->usbcmd); |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* stop all USB activities */ |
| static void stop_activity(struct langwell_udc *dev) |
| { |
| struct langwell_ep *ep; |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| nuke(&dev->ep[0], -ESHUTDOWN); |
| |
| list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| nuke(ep, -ESHUTDOWN); |
| } |
| |
| /* report disconnect; the driver is already quiesced */ |
| if (dev->driver) { |
| spin_unlock(&dev->lock); |
| dev->driver->disconnect(&dev->gadget); |
| spin_lock(&dev->lock); |
| } |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* device "function" sysfs attribute file */ |
| static ssize_t show_function(struct device *_dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct langwell_udc *dev = dev_get_drvdata(_dev); |
| |
| if (!dev->driver || !dev->driver->function |
| || strlen(dev->driver->function) > PAGE_SIZE) |
| return 0; |
| |
| return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); |
| } |
| static DEVICE_ATTR(function, S_IRUGO, show_function, NULL); |
| |
| |
| static inline enum usb_device_speed lpm_device_speed(u32 reg) |
| { |
| switch (LPM_PSPD(reg)) { |
| case LPM_SPEED_HIGH: |
| return USB_SPEED_HIGH; |
| case LPM_SPEED_FULL: |
| return USB_SPEED_FULL; |
| case LPM_SPEED_LOW: |
| return USB_SPEED_LOW; |
| default: |
| return USB_SPEED_UNKNOWN; |
| } |
| } |
| |
| /* device "langwell_udc" sysfs attribute file */ |
| static ssize_t show_langwell_udc(struct device *_dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct langwell_udc *dev = dev_get_drvdata(_dev); |
| struct langwell_request *req; |
| struct langwell_ep *ep = NULL; |
| char *next; |
| unsigned size; |
| unsigned t; |
| unsigned i; |
| unsigned long flags; |
| u32 tmp_reg; |
| |
| next = buf; |
| size = PAGE_SIZE; |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* driver basic information */ |
| 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; |
| |
| /* device registers */ |
| tmp_reg = readl(&dev->op_regs->usbcmd); |
| t = scnprintf(next, size, |
| "USBCMD reg:\n" |
| "SetupTW: %d\n" |
| "Run/Stop: %s\n\n", |
| (tmp_reg & CMD_SUTW) ? 1 : 0, |
| (tmp_reg & CMD_RUNSTOP) ? "Run" : "Stop"); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->usbsts); |
| t = scnprintf(next, size, |
| "USB Status Reg:\n" |
| "Device Suspend: %d\n" |
| "Reset Received: %d\n" |
| "System Error: %s\n" |
| "USB Error Interrupt: %s\n\n", |
| (tmp_reg & STS_SLI) ? 1 : 0, |
| (tmp_reg & STS_URI) ? 1 : 0, |
| (tmp_reg & STS_SEI) ? "Error" : "No error", |
| (tmp_reg & STS_UEI) ? "Error detected" : "No error"); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->usbintr); |
| t = scnprintf(next, size, |
| "USB Intrrupt Enable Reg:\n" |
| "Sleep Enable: %d\n" |
| "SOF Received Enable: %d\n" |
| "Reset Enable: %d\n" |
| "System Error Enable: %d\n" |
| "Port Change Dectected Enable: %d\n" |
| "USB Error Intr Enable: %d\n" |
| "USB Intr Enable: %d\n\n", |
| (tmp_reg & INTR_SLE) ? 1 : 0, |
| (tmp_reg & INTR_SRE) ? 1 : 0, |
| (tmp_reg & INTR_URE) ? 1 : 0, |
| (tmp_reg & INTR_SEE) ? 1 : 0, |
| (tmp_reg & INTR_PCE) ? 1 : 0, |
| (tmp_reg & INTR_UEE) ? 1 : 0, |
| (tmp_reg & INTR_UE) ? 1 : 0); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->frindex); |
| t = scnprintf(next, size, |
| "USB Frame Index Reg:\n" |
| "Frame Number is 0x%08x\n\n", |
| (tmp_reg & FRINDEX_MASK)); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->deviceaddr); |
| t = scnprintf(next, size, |
| "USB Device Address Reg:\n" |
| "Device Addr is 0x%x\n\n", |
| USBADR(tmp_reg)); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->endpointlistaddr); |
| t = scnprintf(next, size, |
| "USB Endpoint List Address Reg:\n" |
| "Endpoint List Pointer is 0x%x\n\n", |
| EPBASE(tmp_reg)); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->portsc1); |
| t = scnprintf(next, size, |
| "USB Port Status & Control Reg:\n" |
| "Port Reset: %s\n" |
| "Port Suspend Mode: %s\n" |
| "Over-current Change: %s\n" |
| "Port Enable/Disable Change: %s\n" |
| "Port Enabled/Disabled: %s\n" |
| "Current Connect Status: %s\n" |
| "LPM Suspend Status: %s\n\n", |
| (tmp_reg & PORTS_PR) ? "Reset" : "Not Reset", |
| (tmp_reg & PORTS_SUSP) ? "Suspend " : "Not Suspend", |
| (tmp_reg & PORTS_OCC) ? "Detected" : "No", |
| (tmp_reg & PORTS_PEC) ? "Changed" : "Not Changed", |
| (tmp_reg & PORTS_PE) ? "Enable" : "Not Correct", |
| (tmp_reg & PORTS_CCS) ? "Attached" : "Not Attached", |
| (tmp_reg & PORTS_SLP) ? "LPM L1" : "LPM L0"); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->devlc); |
| t = scnprintf(next, size, |
| "Device LPM Control Reg:\n" |
| "Parallel Transceiver : %d\n" |
| "Serial Transceiver : %d\n" |
| "Port Speed: %s\n" |
| "Port Force Full Speed Connenct: %s\n" |
| "PHY Low Power Suspend Clock: %s\n" |
| "BmAttributes: %d\n\n", |
| LPM_PTS(tmp_reg), |
| (tmp_reg & LPM_STS) ? 1 : 0, |
| usb_speed_string(lpm_device_speed(tmp_reg)), |
| (tmp_reg & LPM_PFSC) ? "Force Full Speed" : "Not Force", |
| (tmp_reg & LPM_PHCD) ? "Disabled" : "Enabled", |
| LPM_BA(tmp_reg)); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->usbmode); |
| t = scnprintf(next, size, |
| "USB Mode Reg:\n" |
| "Controller Mode is : %s\n\n", ({ |
| char *s; |
| switch (MODE_CM(tmp_reg)) { |
| case MODE_IDLE: |
| s = "Idle"; break; |
| case MODE_DEVICE: |
| s = "Device Controller"; break; |
| case MODE_HOST: |
| s = "Host Controller"; break; |
| default: |
| s = "None"; break; |
| } |
| s; |
| })); |
| size -= t; |
| next += t; |
| |
| tmp_reg = readl(&dev->op_regs->endptsetupstat); |
| t = scnprintf(next, size, |
| "Endpoint Setup Status Reg:\n" |
| "SETUP on ep 0x%04x\n\n", |
| tmp_reg & SETUPSTAT_MASK); |
| size -= t; |
| next += t; |
| |
| for (i = 0; i < dev->ep_max / 2; i++) { |
| tmp_reg = readl(&dev->op_regs->endptctrl[i]); |
| t = scnprintf(next, size, "EP Ctrl Reg [%d]: 0x%08x\n", |
| i, tmp_reg); |
| size -= t; |
| next += t; |
| } |
| tmp_reg = readl(&dev->op_regs->endptprime); |
| t = scnprintf(next, size, "EP Prime Reg: 0x%08x\n\n", tmp_reg); |
| size -= t; |
| next += t; |
| |
| /* langwell_udc, langwell_ep, langwell_request structure information */ |
| ep = &dev->ep[0]; |
| t = scnprintf(next, size, "%s MaxPacketSize: 0x%x, ep_num: %d\n", |
| ep->ep.name, ep->ep.maxpacket, ep->ep_num); |
| size -= t; |
| next += t; |
| |
| if (list_empty(&ep->queue)) { |
| t = scnprintf(next, size, "its req queue is empty\n\n"); |
| size -= t; |
| next += t; |
| } else { |
| list_for_each_entry(req, &ep->queue, queue) { |
| t = scnprintf(next, size, |
| "req %p actual 0x%x length 0x%x buf %p\n", |
| &req->req, req->req.actual, |
| req->req.length, req->req.buf); |
| size -= t; |
| next += t; |
| } |
| } |
| /* other gadget->eplist ep */ |
| list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| if (ep->desc) { |
| t = scnprintf(next, size, |
| "\n%s MaxPacketSize: 0x%x, " |
| "ep_num: %d\n", |
| ep->ep.name, ep->ep.maxpacket, |
| ep->ep_num); |
| size -= t; |
| next += t; |
| |
| if (list_empty(&ep->queue)) { |
| t = scnprintf(next, size, |
| "its req queue is empty\n\n"); |
| size -= t; |
| next += t; |
| } else { |
| list_for_each_entry(req, &ep->queue, queue) { |
| t = scnprintf(next, size, |
| "req %p actual 0x%x length " |
| "0x%x buf %p\n", |
| &req->req, req->req.actual, |
| req->req.length, req->req.buf); |
| size -= t; |
| next += t; |
| } |
| } |
| } |
| } |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return PAGE_SIZE - size; |
| } |
| static DEVICE_ATTR(langwell_udc, S_IRUGO, show_langwell_udc, NULL); |
| |
| |
| /* device "remote_wakeup" sysfs attribute file */ |
| static ssize_t store_remote_wakeup(struct device *_dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct langwell_udc *dev = dev_get_drvdata(_dev); |
| unsigned long flags; |
| ssize_t rc = count; |
| |
| if (count > 2) |
| return -EINVAL; |
| |
| if (count > 0 && buf[count-1] == '\n') |
| ((char *) buf)[count-1] = 0; |
| |
| if (buf[0] != '1') |
| return -EINVAL; |
| |
| /* force remote wakeup enabled in case gadget driver doesn't support */ |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->remote_wakeup = 1; |
| dev->dev_status |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| langwell_wakeup(&dev->gadget); |
| |
| return rc; |
| } |
| static DEVICE_ATTR(remote_wakeup, S_IWUSR, NULL, store_remote_wakeup); |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * when a driver is successfully registered, it will receive |
| * control requests including set_configuration(), which enables |
| * non-control requests. then usb traffic follows until a |
| * disconnect is reported. then a host may connect again, or |
| * the driver might get unbound. |
| */ |
| |
| static int langwell_start(struct usb_gadget *g, |
| struct usb_gadget_driver *driver) |
| { |
| struct langwell_udc *dev = gadget_to_langwell(g); |
| unsigned long flags; |
| int retval; |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* hook up the driver ... */ |
| driver->driver.bus = NULL; |
| dev->driver = driver; |
| dev->gadget.dev.driver = &driver->driver; |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| retval = device_create_file(&dev->pdev->dev, &dev_attr_function); |
| if (retval) |
| goto err; |
| |
| dev->usb_state = USB_STATE_ATTACHED; |
| dev->ep0_state = WAIT_FOR_SETUP; |
| dev->ep0_dir = USB_DIR_OUT; |
| |
| /* enable interrupt and set controller to run state */ |
| if (dev->got_irq) |
| langwell_udc_start(dev); |
| |
| dev_vdbg(&dev->pdev->dev, |
| "After langwell_udc_start(), print all registers:\n"); |
| print_all_registers(dev); |
| |
| dev_info(&dev->pdev->dev, "register driver: %s\n", |
| driver->driver.name); |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| |
| return 0; |
| |
| err: |
| dev->gadget.dev.driver = NULL; |
| dev->driver = NULL; |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| |
| return retval; |
| } |
| |
| /* unregister gadget driver */ |
| static int langwell_stop(struct usb_gadget *g, |
| struct usb_gadget_driver *driver) |
| { |
| struct langwell_udc *dev = gadget_to_langwell(g); |
| unsigned long flags; |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* exit PHY low power suspend */ |
| if (dev->pdev->device != 0x0829) |
| langwell_phy_low_power(dev, 0); |
| |
| /* unbind OTG transceiver */ |
| if (dev->transceiver) |
| (void)otg_set_peripheral(dev->transceiver, 0); |
| |
| /* disable interrupt and set controller to stop state */ |
| langwell_udc_stop(dev); |
| |
| dev->usb_state = USB_STATE_ATTACHED; |
| dev->ep0_state = WAIT_FOR_SETUP; |
| dev->ep0_dir = USB_DIR_OUT; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* stop all usb activities */ |
| dev->gadget.speed = USB_SPEED_UNKNOWN; |
| dev->gadget.dev.driver = NULL; |
| dev->driver = NULL; |
| stop_activity(dev); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| device_remove_file(&dev->pdev->dev, &dev_attr_function); |
| |
| dev_info(&dev->pdev->dev, "unregistered driver '%s'\n", |
| driver->driver.name); |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| |
| return 0; |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * setup tripwire is used as a semaphore to ensure that the setup data |
| * payload is extracted from a dQH without being corrupted |
| */ |
| static void setup_tripwire(struct langwell_udc *dev) |
| { |
| u32 usbcmd, |
| endptsetupstat; |
| unsigned long timeout; |
| struct langwell_dqh *dqh; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* ep0 OUT dQH */ |
| dqh = &dev->ep_dqh[EP_DIR_OUT]; |
| |
| /* Write-Clear endptsetupstat */ |
| endptsetupstat = readl(&dev->op_regs->endptsetupstat); |
| writel(endptsetupstat, &dev->op_regs->endptsetupstat); |
| |
| /* wait until endptsetupstat is cleared */ |
| timeout = jiffies + SETUPSTAT_TIMEOUT; |
| while (readl(&dev->op_regs->endptsetupstat)) { |
| if (time_after(jiffies, timeout)) { |
| dev_err(&dev->pdev->dev, "setup_tripwire timeout\n"); |
| break; |
| } |
| cpu_relax(); |
| } |
| |
| /* while a hazard exists when setup packet arrives */ |
| do { |
| /* set setup tripwire bit */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| writel(usbcmd | CMD_SUTW, &dev->op_regs->usbcmd); |
| |
| /* copy the setup packet to local buffer */ |
| memcpy(&dev->local_setup_buff, &dqh->dqh_setup, 8); |
| } while (!(readl(&dev->op_regs->usbcmd) & CMD_SUTW)); |
| |
| /* Write-Clear setup tripwire bit */ |
| usbcmd = readl(&dev->op_regs->usbcmd); |
| writel(usbcmd & ~CMD_SUTW, &dev->op_regs->usbcmd); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* protocol ep0 stall, will automatically be cleared on new transaction */ |
| static void ep0_stall(struct langwell_udc *dev) |
| { |
| u32 endptctrl; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* set TX and RX to stall */ |
| endptctrl = readl(&dev->op_regs->endptctrl[0]); |
| endptctrl |= EPCTRL_TXS | EPCTRL_RXS; |
| writel(endptctrl, &dev->op_regs->endptctrl[0]); |
| |
| /* update ep0 state */ |
| dev->ep0_state = WAIT_FOR_SETUP; |
| dev->ep0_dir = USB_DIR_OUT; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* PRIME a status phase for ep0 */ |
| static int prime_status_phase(struct langwell_udc *dev, int dir) |
| { |
| struct langwell_request *req; |
| struct langwell_ep *ep; |
| int status = 0; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (dir == EP_DIR_IN) |
| dev->ep0_dir = USB_DIR_IN; |
| else |
| dev->ep0_dir = USB_DIR_OUT; |
| |
| ep = &dev->ep[0]; |
| dev->ep0_state = WAIT_FOR_OUT_STATUS; |
| |
| req = dev->status_req; |
| |
| req->ep = ep; |
| req->req.length = 0; |
| req->req.status = -EINPROGRESS; |
| req->req.actual = 0; |
| req->req.complete = NULL; |
| req->dtd_count = 0; |
| |
| if (!req_to_dtd(req)) |
| status = queue_dtd(ep, req); |
| else |
| return -ENOMEM; |
| |
| if (status) |
| dev_err(&dev->pdev->dev, "can't queue ep0 status request\n"); |
| |
| list_add_tail(&req->queue, &ep->queue); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return status; |
| } |
| |
| |
| /* SET_ADDRESS request routine */ |
| static void set_address(struct langwell_udc *dev, u16 value, |
| u16 index, u16 length) |
| { |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* save the new address to device struct */ |
| dev->dev_addr = (u8) value; |
| dev_vdbg(&dev->pdev->dev, "dev->dev_addr = %d\n", dev->dev_addr); |
| |
| /* update usb state */ |
| dev->usb_state = USB_STATE_ADDRESS; |
| |
| /* STATUS phase */ |
| if (prime_status_phase(dev, EP_DIR_IN)) |
| ep0_stall(dev); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* return endpoint by windex */ |
| static struct langwell_ep *get_ep_by_windex(struct langwell_udc *dev, |
| u16 wIndex) |
| { |
| struct langwell_ep *ep; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) |
| return &dev->ep[0]; |
| |
| list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| u8 bEndpointAddress; |
| if (!ep->desc) |
| continue; |
| |
| bEndpointAddress = ep->desc->bEndpointAddress; |
| if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) |
| continue; |
| |
| if ((wIndex & USB_ENDPOINT_NUMBER_MASK) |
| == (bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)) |
| return ep; |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return NULL; |
| } |
| |
| |
| /* return whether endpoint is stalled, 0: not stalled; 1: stalled */ |
| static int ep_is_stall(struct langwell_ep *ep) |
| { |
| struct langwell_udc *dev = ep->dev; |
| u32 endptctrl; |
| int retval; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| endptctrl = readl(&dev->op_regs->endptctrl[ep->ep_num]); |
| if (is_in(ep)) |
| retval = endptctrl & EPCTRL_TXS ? 1 : 0; |
| else |
| retval = endptctrl & EPCTRL_RXS ? 1 : 0; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return retval; |
| } |
| |
| |
| /* GET_STATUS request routine */ |
| static void get_status(struct langwell_udc *dev, u8 request_type, u16 value, |
| u16 index, u16 length) |
| { |
| struct langwell_request *req; |
| struct langwell_ep *ep; |
| u16 status_data = 0; /* 16 bits cpu view status data */ |
| int status = 0; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| ep = &dev->ep[0]; |
| |
| if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) { |
| /* get device status */ |
| status_data = dev->dev_status; |
| } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) { |
| /* get interface status */ |
| status_data = 0; |
| } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { |
| /* get endpoint status */ |
| struct langwell_ep *epn; |
| epn = get_ep_by_windex(dev, index); |
| /* stall if endpoint doesn't exist */ |
| if (!epn) |
| goto stall; |
| |
| status_data = ep_is_stall(epn) << USB_ENDPOINT_HALT; |
| } |
| |
| dev_dbg(&dev->pdev->dev, "get status data: 0x%04x\n", status_data); |
| |
| dev->ep0_dir = USB_DIR_IN; |
| |
| /* borrow the per device status_req */ |
| req = dev->status_req; |
| |
| /* fill in the reqest structure */ |
| *((u16 *) req->req.buf) = cpu_to_le16(status_data); |
| req->ep = ep; |
| req->req.length = 2; |
| req->req.status = -EINPROGRESS; |
| req->req.actual = 0; |
| req->req.complete = NULL; |
| req->dtd_count = 0; |
| |
| /* prime the data phase */ |
| if (!req_to_dtd(req)) |
| status = queue_dtd(ep, req); |
| else /* no mem */ |
| goto stall; |
| |
| if (status) { |
| dev_err(&dev->pdev->dev, |
| "response error on GET_STATUS request\n"); |
| goto stall; |
| } |
| |
| list_add_tail(&req->queue, &ep->queue); |
| dev->ep0_state = DATA_STATE_XMIT; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return; |
| stall: |
| ep0_stall(dev); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* setup packet interrupt handler */ |
| static void handle_setup_packet(struct langwell_udc *dev, |
| struct usb_ctrlrequest *setup) |
| { |
| u16 wValue = le16_to_cpu(setup->wValue); |
| u16 wIndex = le16_to_cpu(setup->wIndex); |
| u16 wLength = le16_to_cpu(setup->wLength); |
| u32 portsc1; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* ep0 fifo flush */ |
| nuke(&dev->ep[0], -ESHUTDOWN); |
| |
| dev_dbg(&dev->pdev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
| setup->bRequestType, setup->bRequest, |
| wValue, wIndex, wLength); |
| |
| /* RNDIS gadget delegate */ |
| if ((setup->bRequestType == 0x21) && (setup->bRequest == 0x00)) { |
| /* USB_CDC_SEND_ENCAPSULATED_COMMAND */ |
| goto delegate; |
| } |
| |
| /* USB_CDC_GET_ENCAPSULATED_RESPONSE */ |
| if ((setup->bRequestType == 0xa1) && (setup->bRequest == 0x01)) { |
| /* USB_CDC_GET_ENCAPSULATED_RESPONSE */ |
| goto delegate; |
| } |
| |
| /* We process some stardard setup requests here */ |
| switch (setup->bRequest) { |
| case USB_REQ_GET_STATUS: |
| dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_GET_STATUS\n"); |
| /* get status, DATA and STATUS phase */ |
| if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) |
| != (USB_DIR_IN | USB_TYPE_STANDARD)) |
| break; |
| get_status(dev, setup->bRequestType, wValue, wIndex, wLength); |
| goto end; |
| |
| case USB_REQ_SET_ADDRESS: |
| dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_SET_ADDRESS\n"); |
| /* STATUS phase */ |
| if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
| | USB_RECIP_DEVICE)) |
| break; |
| set_address(dev, wValue, wIndex, wLength); |
| goto end; |
| |
| case USB_REQ_CLEAR_FEATURE: |
| case USB_REQ_SET_FEATURE: |
| /* STATUS phase */ |
| { |
| int rc = -EOPNOTSUPP; |
| if (setup->bRequest == USB_REQ_SET_FEATURE) |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_SET_FEATURE\n"); |
| else if (setup->bRequest == USB_REQ_CLEAR_FEATURE) |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_CLEAR_FEATURE\n"); |
| |
| if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK)) |
| == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) { |
| struct langwell_ep *epn; |
| epn = get_ep_by_windex(dev, wIndex); |
| /* stall if endpoint doesn't exist */ |
| if (!epn) { |
| ep0_stall(dev); |
| goto end; |
| } |
| |
| if (wValue != 0 || wLength != 0 |
| || epn->ep_num > dev->ep_max) |
| break; |
| |
| spin_unlock(&dev->lock); |
| rc = langwell_ep_set_halt(&epn->ep, |
| (setup->bRequest == USB_REQ_SET_FEATURE) |
| ? 1 : 0); |
| spin_lock(&dev->lock); |
| |
| } else if ((setup->bRequestType & (USB_RECIP_MASK |
| | USB_TYPE_MASK)) == (USB_RECIP_DEVICE |
| | USB_TYPE_STANDARD)) { |
| rc = 0; |
| switch (wValue) { |
| case USB_DEVICE_REMOTE_WAKEUP: |
| if (setup->bRequest == USB_REQ_SET_FEATURE) { |
| dev->remote_wakeup = 1; |
| dev->dev_status |= (1 << wValue); |
| } else { |
| dev->remote_wakeup = 0; |
| dev->dev_status &= ~(1 << wValue); |
| } |
| break; |
| case USB_DEVICE_TEST_MODE: |
| dev_dbg(&dev->pdev->dev, "SETUP: TEST MODE\n"); |
| if ((wIndex & 0xff) || |
| (dev->gadget.speed != USB_SPEED_HIGH)) |
| ep0_stall(dev); |
| |
| switch (wIndex >> 8) { |
| case TEST_J: |
| case TEST_K: |
| case TEST_SE0_NAK: |
| case TEST_PACKET: |
| case TEST_FORCE_EN: |
| if (prime_status_phase(dev, EP_DIR_IN)) |
| ep0_stall(dev); |
| portsc1 = readl(&dev->op_regs->portsc1); |
| portsc1 |= (wIndex & 0xf00) << 8; |
| writel(portsc1, &dev->op_regs->portsc1); |
| goto end; |
| default: |
| rc = -EOPNOTSUPP; |
| } |
| break; |
| default: |
| rc = -EOPNOTSUPP; |
| break; |
| } |
| |
| if (!gadget_is_otg(&dev->gadget)) |
| break; |
| else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE) { |
| dev->gadget.b_hnp_enable = 1; |
| #ifdef OTG_TRANSCEIVER |
| if (!dev->lotg->otg.default_a) |
| dev->lotg->hsm.b_hnp_enable = 1; |
| #endif |
| } else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT) |
| dev->gadget.a_hnp_support = 1; |
| else if (setup->bRequest == |
| USB_DEVICE_A_ALT_HNP_SUPPORT) |
| dev->gadget.a_alt_hnp_support = 1; |
| else |
| break; |
| } else |
| break; |
| |
| if (rc == 0) { |
| if (prime_status_phase(dev, EP_DIR_IN)) |
| ep0_stall(dev); |
| } |
| goto end; |
| } |
| |
| case USB_REQ_GET_DESCRIPTOR: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_GET_DESCRIPTOR\n"); |
| goto delegate; |
| |
| case USB_REQ_SET_DESCRIPTOR: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_SET_DESCRIPTOR unsupported\n"); |
| goto delegate; |
| |
| case USB_REQ_GET_CONFIGURATION: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_GET_CONFIGURATION\n"); |
| goto delegate; |
| |
| case USB_REQ_SET_CONFIGURATION: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_SET_CONFIGURATION\n"); |
| goto delegate; |
| |
| case USB_REQ_GET_INTERFACE: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_GET_INTERFACE\n"); |
| goto delegate; |
| |
| case USB_REQ_SET_INTERFACE: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_SET_INTERFACE\n"); |
| goto delegate; |
| |
| case USB_REQ_SYNCH_FRAME: |
| dev_dbg(&dev->pdev->dev, |
| "SETUP: USB_REQ_SYNCH_FRAME unsupported\n"); |
| goto delegate; |
| |
| default: |
| /* delegate USB standard requests to the gadget driver */ |
| goto delegate; |
| delegate: |
| /* USB requests handled by gadget */ |
| if (wLength) { |
| /* DATA phase from gadget, STATUS phase from udc */ |
| dev->ep0_dir = (setup->bRequestType & USB_DIR_IN) |
| ? USB_DIR_IN : USB_DIR_OUT; |
| dev_vdbg(&dev->pdev->dev, |
| "dev->ep0_dir = 0x%x, wLength = %d\n", |
| dev->ep0_dir, wLength); |
| spin_unlock(&dev->lock); |
| if (dev->driver->setup(&dev->gadget, |
| &dev->local_setup_buff) < 0) |
| ep0_stall(dev); |
| spin_lock(&dev->lock); |
| dev->ep0_state = (setup->bRequestType & USB_DIR_IN) |
| ? DATA_STATE_XMIT : DATA_STATE_RECV; |
| } else { |
| /* no DATA phase, IN STATUS phase from gadget */ |
| dev->ep0_dir = USB_DIR_IN; |
| dev_vdbg(&dev->pdev->dev, |
| "dev->ep0_dir = 0x%x, wLength = %d\n", |
| dev->ep0_dir, wLength); |
| spin_unlock(&dev->lock); |
| if (dev->driver->setup(&dev->gadget, |
| &dev->local_setup_buff) < 0) |
| ep0_stall(dev); |
| spin_lock(&dev->lock); |
| dev->ep0_state = WAIT_FOR_OUT_STATUS; |
| } |
| break; |
| } |
| end: |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* transfer completion, process endpoint request and free the completed dTDs |
| * for this request |
| */ |
| static int process_ep_req(struct langwell_udc *dev, int index, |
| struct langwell_request *curr_req) |
| { |
| struct langwell_dtd *curr_dtd; |
| struct langwell_dqh *curr_dqh; |
| int td_complete, actual, remaining_length; |
| int i, dir; |
| u8 dtd_status = 0; |
| int retval = 0; |
| |
| curr_dqh = &dev->ep_dqh[index]; |
| dir = index % 2; |
| |
| curr_dtd = curr_req->head; |
| td_complete = 0; |
| actual = curr_req->req.length; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| for (i = 0; i < curr_req->dtd_count; i++) { |
| |
| /* command execution states by dTD */ |
| dtd_status = curr_dtd->dtd_status; |
| |
| barrier(); |
| remaining_length = le16_to_cpu(curr_dtd->dtd_total); |
| actual -= remaining_length; |
| |
| if (!dtd_status) { |
| /* transfers completed successfully */ |
| if (!remaining_length) { |
| td_complete++; |
| dev_vdbg(&dev->pdev->dev, |
| "dTD transmitted successfully\n"); |
| } else { |
| if (dir) { |
| dev_vdbg(&dev->pdev->dev, |
| "TX dTD remains data\n"); |
| retval = -EPROTO; |
| break; |
| |
| } else { |
| td_complete++; |
| break; |
| } |
| } |
| } else { |
| /* transfers completed with errors */ |
| if (dtd_status & DTD_STS_ACTIVE) { |
| dev_dbg(&dev->pdev->dev, |
| "dTD status ACTIVE dQH[%d]\n", index); |
| retval = 1; |
| return retval; |
| } else if (dtd_status & DTD_STS_HALTED) { |
| dev_err(&dev->pdev->dev, |
| "dTD error %08x dQH[%d]\n", |
| dtd_status, index); |
| /* clear the errors and halt condition */ |
| curr_dqh->dtd_status = 0; |
| retval = -EPIPE; |
| break; |
| } else if (dtd_status & DTD_STS_DBE) { |
| dev_dbg(&dev->pdev->dev, |
| "data buffer (overflow) error\n"); |
| retval = -EPROTO; |
| break; |
| } else if (dtd_status & DTD_STS_TRE) { |
| dev_dbg(&dev->pdev->dev, |
| "transaction(ISO) error\n"); |
| retval = -EILSEQ; |
| break; |
| } else |
| dev_err(&dev->pdev->dev, |
| "unknown error (0x%x)!\n", |
| dtd_status); |
| } |
| |
| if (i != curr_req->dtd_count - 1) |
| curr_dtd = (struct langwell_dtd *) |
| curr_dtd->next_dtd_virt; |
| } |
| |
| if (retval) |
| return retval; |
| |
| curr_req->req.actual = actual; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return 0; |
| } |
| |
| |
| /* complete DATA or STATUS phase of ep0 prime status phase if needed */ |
| static void ep0_req_complete(struct langwell_udc *dev, |
| struct langwell_ep *ep0, struct langwell_request *req) |
| { |
| u32 new_addr; |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (dev->usb_state == USB_STATE_ADDRESS) { |
| /* set the new address */ |
| new_addr = (u32)dev->dev_addr; |
| writel(new_addr << USBADR_SHIFT, &dev->op_regs->deviceaddr); |
| |
| new_addr = USBADR(readl(&dev->op_regs->deviceaddr)); |
| dev_vdbg(&dev->pdev->dev, "new_addr = %d\n", new_addr); |
| } |
| |
| done(ep0, req, 0); |
| |
| switch (dev->ep0_state) { |
| case DATA_STATE_XMIT: |
| /* receive status phase */ |
| if (prime_status_phase(dev, EP_DIR_OUT)) |
| ep0_stall(dev); |
| break; |
| case DATA_STATE_RECV: |
| /* send status phase */ |
| if (prime_status_phase(dev, EP_DIR_IN)) |
| ep0_stall(dev); |
| break; |
| case WAIT_FOR_OUT_STATUS: |
| dev->ep0_state = WAIT_FOR_SETUP; |
| break; |
| case WAIT_FOR_SETUP: |
| dev_err(&dev->pdev->dev, "unexpect ep0 packets\n"); |
| break; |
| default: |
| ep0_stall(dev); |
| break; |
| } |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* USB transfer completion interrupt */ |
| static void handle_trans_complete(struct langwell_udc *dev) |
| { |
| u32 complete_bits; |
| int i, ep_num, dir, bit_mask, status; |
| struct langwell_ep *epn; |
| struct langwell_request *curr_req, *temp_req; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| complete_bits = readl(&dev->op_regs->endptcomplete); |
| dev_vdbg(&dev->pdev->dev, "endptcomplete register: 0x%08x\n", |
| complete_bits); |
| |
| /* Write-Clear the bits in endptcomplete register */ |
| writel(complete_bits, &dev->op_regs->endptcomplete); |
| |
| if (!complete_bits) { |
| dev_dbg(&dev->pdev->dev, "complete_bits = 0\n"); |
| goto done; |
| } |
| |
| for (i = 0; i < dev->ep_max; i++) { |
| ep_num = i / 2; |
| dir = i % 2; |
| |
| bit_mask = 1 << (ep_num + 16 * dir); |
| |
| if (!(complete_bits & bit_mask)) |
| continue; |
| |
| /* ep0 */ |
| if (i == 1) |
| epn = &dev->ep[0]; |
| else |
| epn = &dev->ep[i]; |
| |
| if (epn->name == NULL) { |
| dev_warn(&dev->pdev->dev, "invalid endpoint\n"); |
| continue; |
| } |
| |
| if (i < 2) |
| /* ep0 in and out */ |
| dev_dbg(&dev->pdev->dev, "%s-%s transfer completed\n", |
| epn->name, |
| is_in(epn) ? "in" : "out"); |
| else |
| dev_dbg(&dev->pdev->dev, "%s transfer completed\n", |
| epn->name); |
| |
| /* process the req queue until an uncomplete request */ |
| list_for_each_entry_safe(curr_req, temp_req, |
| &epn->queue, queue) { |
| status = process_ep_req(dev, i, curr_req); |
| dev_vdbg(&dev->pdev->dev, "%s req status: %d\n", |
| epn->name, status); |
| |
| if (status) |
| break; |
| |
| /* write back status to req */ |
| curr_req->req.status = status; |
| |
| /* ep0 request completion */ |
| if (ep_num == 0) { |
| ep0_req_complete(dev, epn, curr_req); |
| break; |
| } else { |
| done(epn, curr_req, status); |
| } |
| } |
| } |
| done: |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| /* port change detect interrupt handler */ |
| static void handle_port_change(struct langwell_udc *dev) |
| { |
| u32 portsc1, devlc; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (dev->bus_reset) |
| dev->bus_reset = 0; |
| |
| portsc1 = readl(&dev->op_regs->portsc1); |
| devlc = readl(&dev->op_regs->devlc); |
| dev_vdbg(&dev->pdev->dev, "portsc1 = 0x%08x, devlc = 0x%08x\n", |
| portsc1, devlc); |
| |
| /* bus reset is finished */ |
| if (!(portsc1 & PORTS_PR)) { |
| /* get the speed */ |
| dev->gadget.speed = lpm_device_speed(devlc); |
| dev_vdbg(&dev->pdev->dev, "dev->gadget.speed = %d\n", |
| dev->gadget.speed); |
| } |
| |
| /* LPM L0 to L1 */ |
| if (dev->lpm && dev->lpm_state == LPM_L0) |
| if (portsc1 & PORTS_SUSP && portsc1 & PORTS_SLP) { |
| dev_info(&dev->pdev->dev, "LPM L0 to L1\n"); |
| dev->lpm_state = LPM_L1; |
| } |
| |
| /* LPM L1 to L0, force resume or remote wakeup finished */ |
| if (dev->lpm && dev->lpm_state == LPM_L1) |
| if (!(portsc1 & PORTS_SUSP)) { |
| dev_info(&dev->pdev->dev, "LPM L1 to L0\n"); |
| dev->lpm_state = LPM_L0; |
| } |
| |
| /* update USB state */ |
| if (!dev->resume_state) |
| dev->usb_state = USB_STATE_DEFAULT; |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* USB reset interrupt handler */ |
| static void handle_usb_reset(struct langwell_udc *dev) |
| { |
| u32 deviceaddr, |
| endptsetupstat, |
| endptcomplete; |
| unsigned long timeout; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| /* Write-Clear the device address */ |
| deviceaddr = readl(&dev->op_regs->deviceaddr); |
| writel(deviceaddr & ~USBADR_MASK, &dev->op_regs->deviceaddr); |
| |
| dev->dev_addr = 0; |
| |
| /* clear usb state */ |
| dev->resume_state = 0; |
| |
| /* LPM L1 to L0, reset */ |
| if (dev->lpm) |
| dev->lpm_state = LPM_L0; |
| |
| dev->ep0_dir = USB_DIR_OUT; |
| dev->ep0_state = WAIT_FOR_SETUP; |
| |
| /* remote wakeup reset to 0 when the device is reset */ |
| dev->remote_wakeup = 0; |
| dev->dev_status = 1 << USB_DEVICE_SELF_POWERED; |
| dev->gadget.b_hnp_enable = 0; |
| dev->gadget.a_hnp_support = 0; |
| dev->gadget.a_alt_hnp_support = 0; |
| |
| /* Write-Clear all the setup token semaphores */ |
| endptsetupstat = readl(&dev->op_regs->endptsetupstat); |
| writel(endptsetupstat, &dev->op_regs->endptsetupstat); |
| |
| /* Write-Clear all the endpoint complete status bits */ |
| endptcomplete = readl(&dev->op_regs->endptcomplete); |
| writel(endptcomplete, &dev->op_regs->endptcomplete); |
| |
| /* wait until all endptprime bits cleared */ |
| timeout = jiffies + PRIME_TIMEOUT; |
| while (readl(&dev->op_regs->endptprime)) { |
| if (time_after(jiffies, timeout)) { |
| dev_err(&dev->pdev->dev, "USB reset timeout\n"); |
| break; |
| } |
| cpu_relax(); |
| } |
| |
| /* write 1s to endptflush register to clear any primed buffers */ |
| writel((u32) ~0, &dev->op_regs->endptflush); |
| |
| if (readl(&dev->op_regs->portsc1) & PORTS_PR) { |
| dev_vdbg(&dev->pdev->dev, "USB bus reset\n"); |
| /* bus is reseting */ |
| dev->bus_reset = 1; |
| |
| /* reset all the queues, stop all USB activities */ |
| stop_activity(dev); |
| dev->usb_state = USB_STATE_DEFAULT; |
| } else { |
| dev_vdbg(&dev->pdev->dev, "device controller reset\n"); |
| /* controller reset */ |
| langwell_udc_reset(dev); |
| |
| /* reset all the queues, stop all USB activities */ |
| stop_activity(dev); |
| |
| /* reset ep0 dQH and endptctrl */ |
| ep0_reset(dev); |
| |
| /* enable interrupt and set controller to run state */ |
| langwell_udc_start(dev); |
| |
| dev->usb_state = USB_STATE_ATTACHED; |
| } |
| |
| #ifdef OTG_TRANSCEIVER |
| /* refer to USB OTG 6.6.2.3 b_hnp_en is cleared */ |
| if (!dev->lotg->otg.default_a) |
| dev->lotg->hsm.b_hnp_enable = 0; |
| #endif |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* USB bus suspend/resume interrupt */ |
| static void handle_bus_suspend(struct langwell_udc *dev) |
| { |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| dev->resume_state = dev->usb_state; |
| dev->usb_state = USB_STATE_SUSPENDED; |
| |
| #ifdef OTG_TRANSCEIVER |
| if (dev->lotg->otg.default_a) { |
| if (dev->lotg->hsm.b_bus_suspend_vld == 1) { |
| dev->lotg->hsm.b_bus_suspend = 1; |
| /* notify transceiver the state changes */ |
| if (spin_trylock(&dev->lotg->wq_lock)) { |
| langwell_update_transceiver(); |
| spin_unlock(&dev->lotg->wq_lock); |
| } |
| } |
| dev->lotg->hsm.b_bus_suspend_vld++; |
| } else { |
| if (!dev->lotg->hsm.a_bus_suspend) { |
| dev->lotg->hsm.a_bus_suspend = 1; |
| /* notify transceiver the state changes */ |
| if (spin_trylock(&dev->lotg->wq_lock)) { |
| langwell_update_transceiver(); |
| spin_unlock(&dev->lotg->wq_lock); |
| } |
| } |
| } |
| #endif |
| |
| /* report suspend to the driver */ |
| if (dev->driver) { |
| if (dev->driver->suspend) { |
| spin_unlock(&dev->lock); |
| dev->driver->suspend(&dev->gadget); |
| spin_lock(&dev->lock); |
| dev_dbg(&dev->pdev->dev, "suspend %s\n", |
| dev->driver->driver.name); |
| } |
| } |
| |
| /* enter PHY low power suspend */ |
| if (dev->pdev->device != 0x0829) |
| langwell_phy_low_power(dev, 0); |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| static void handle_bus_resume(struct langwell_udc *dev) |
| { |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| dev->usb_state = dev->resume_state; |
| dev->resume_state = 0; |
| |
| /* exit PHY low power suspend */ |
| if (dev->pdev->device != 0x0829) |
| langwell_phy_low_power(dev, 0); |
| |
| #ifdef OTG_TRANSCEIVER |
| if (dev->lotg->otg.default_a == 0) |
| dev->lotg->hsm.a_bus_suspend = 0; |
| #endif |
| |
| /* report resume to the driver */ |
| if (dev->driver) { |
| if (dev->driver->resume) { |
| spin_unlock(&dev->lock); |
| dev->driver->resume(&dev->gadget); |
| spin_lock(&dev->lock); |
| dev_dbg(&dev->pdev->dev, "resume %s\n", |
| dev->driver->driver.name); |
| } |
| } |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| } |
| |
| |
| /* USB device controller interrupt handler */ |
| static irqreturn_t langwell_irq(int irq, void *_dev) |
| { |
| struct langwell_udc *dev = _dev; |
| u32 usbsts, |
| usbintr, |
| irq_sts, |
| portsc1; |
| |
| dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| if (dev->stopped) { |
| dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n"); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return IRQ_NONE; |
| } |
| |
| spin_lock(&dev->lock); |
| |
| /* USB status */ |
| usbsts = readl(&dev->op_regs->usbsts); |
| |
| /* USB interrupt enable */ |
| usbintr = readl(&dev->op_regs->usbintr); |
| |
| irq_sts = usbsts & usbintr; |
| dev_vdbg(&dev->pdev->dev, |
| "usbsts = 0x%08x, usbintr = 0x%08x, irq_sts = 0x%08x\n", |
| usbsts, usbintr, irq_sts); |
| |
| if (!irq_sts) { |
| dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n"); |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| spin_unlock(&dev->lock); |
| return IRQ_NONE; |
| } |
| |
| /* Write-Clear interrupt status bits */ |
| writel(irq_sts, &dev->op_regs->usbsts); |
| |
| /* resume from suspend */ |
| portsc1 = readl(&dev->op_regs->portsc1); |
| if (dev->usb_state == USB_STATE_SUSPENDED) |
| if (!(portsc1 & PORTS_SUSP)) |
| handle_bus_resume(dev); |
| |
| /* USB interrupt */ |
| if (irq_sts & STS_UI) { |
| dev_vdbg(&dev->pdev->dev, "USB interrupt\n"); |
| |
| /* setup packet received from ep0 */ |
| if (readl(&dev->op_regs->endptsetupstat) |
| & EP0SETUPSTAT_MASK) { |
| dev_vdbg(&dev->pdev->dev, |
| "USB SETUP packet received interrupt\n"); |
| /* setup tripwire semaphone */ |
| setup_tripwire(dev); |
| handle_setup_packet(dev, &dev->local_setup_buff); |
| } |
| |
| /* USB transfer completion */ |
| if (readl(&dev->op_regs->endptcomplete)) { |
| dev_vdbg(&dev->pdev->dev, |
| "USB transfer completion interrupt\n"); |
| handle_trans_complete(dev); |
| } |
| } |
| |
| /* SOF received interrupt (for ISO transfer) */ |
| if (irq_sts & STS_SRI) { |
| /* FIXME */ |
| /* dev_vdbg(&dev->pdev->dev, "SOF received interrupt\n"); */ |
| } |
| |
| /* port change detect interrupt */ |
| if (irq_sts & STS_PCI) { |
| dev_vdbg(&dev->pdev->dev, "port change detect interrupt\n"); |
| handle_port_change(dev); |
| } |
| |
| /* suspend interrupt */ |
| if (irq_sts & STS_SLI) { |
| dev_vdbg(&dev->pdev->dev, "suspend interrupt\n"); |
| handle_bus_suspend(dev); |
| } |
| |
| /* USB reset interrupt */ |
| if (irq_sts & STS_URI) { |
| dev_vdbg(&dev->pdev->dev, "USB reset interrupt\n"); |
| handle_usb_reset(dev); |
| } |
| |
| /* USB error or system error interrupt */ |
| if (irq_sts & (STS_UEI | STS_SEI)) { |
| /* FIXME */ |
| dev_warn(&dev->pdev->dev, "error IRQ, irq_sts: %x\n", irq_sts); |
| } |
| |
| spin_unlock(&dev->lock); |
| |
| dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| return IRQ_HANDLED; |
| } |
| |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* release device structure */ |
| static void gadget_release(struct device *_dev) |
| { |
| struct langwell_udc *dev = dev_get_drvdata(_dev); |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| complete(dev->done); |
| |
| dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| kfree(dev); |
| } |
| |
| |
| /* enable SRAM caching if SRAM detected */ |
| static void sram_init(struct langwell_udc *dev) |
| { |
| struct pci_dev *pdev = dev->pdev; |
| |
| dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| |
| dev->sram_addr = pci_resource_start(pdev, 1); |
| dev->sram_size = pci_resource_len(pdev, 1); |
| dev_info(&dev->pdev->dev, "Found private SRAM at %x size:%x\n", |
| dev->sram_addr, dev->sram_size); |
| dev->got_sram = 1; |
| |
| if (pci_request_region(pdev, 1, kobject_name(&pdev->dev.kobj))) { |
| dev_warn(&dev->pdev->dev, "SRAM request failed\n"); |
| dev->got_sram |