From 54e4026b64a970303349b952866641a7804ef594 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Wed, 15 Apr 2009 14:25:33 +0200 Subject: USB: gadget: Add i.MX3x support to the fsl_usb2_udc driver This patch adds support for i.MX3x (only tested with i.MX31 so far) ARM SoCs to the fsl_usb2_udc driver. It also moves PHY configuration before controller reset, because otherwise an ULPI PHY doesn't get a reset and doesn't function after a reboot. The problem with longer control transfers is still not fixed. The patch renames the fsl_usb2_udc.c file to fsl_udc_core.c to preserve the same module name for user-space backwards compatibility. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/fsl_usb2_udc.c | 2468 ------------------------------------- 1 file changed, 2468 deletions(-) delete mode 100644 drivers/usb/gadget/fsl_usb2_udc.c (limited to 'drivers/usb/gadget/fsl_usb2_udc.c') diff --git a/drivers/usb/gadget/fsl_usb2_udc.c b/drivers/usb/gadget/fsl_usb2_udc.c deleted file mode 100644 index 9d7b95d4e3d2..000000000000 --- a/drivers/usb/gadget/fsl_usb2_udc.c +++ /dev/null @@ -1,2468 +0,0 @@ -/* - * Copyright (C) 2004-2007 Freescale Semicondutor, Inc. All rights reserved. - * - * Author: Li Yang - * Jiang Bo - * - * Description: - * Freescale high-speed USB SOC DR module device controller driver. - * This can be found on MPC8349E/MPC8313E cpus. - * The driver is previously named as mpc_udc. Based on bare board - * code from Dave Liu and Shlomi Gridish. - * - * 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. - */ - -#undef VERBOSE - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include - -#include "fsl_usb2_udc.h" - -#define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver" -#define DRIVER_AUTHOR "Li Yang/Jiang Bo" -#define DRIVER_VERSION "Apr 20, 2007" - -#define DMA_ADDR_INVALID (~(dma_addr_t)0) - -static const char driver_name[] = "fsl-usb2-udc"; -static const char driver_desc[] = DRIVER_DESC; - -static struct usb_dr_device *dr_regs; -static struct usb_sys_interface *usb_sys_regs; - -/* it is initialized in probe() */ -static struct fsl_udc *udc_controller = NULL; - -static const struct usb_endpoint_descriptor -fsl_ep0_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = 0, - .bmAttributes = USB_ENDPOINT_XFER_CONTROL, - .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD, -}; - -static void fsl_ep_fifo_flush(struct usb_ep *_ep); - -#ifdef CONFIG_PPC32 -#define fsl_readl(addr) in_le32(addr) -#define fsl_writel(val32, addr) out_le32(addr, val32) -#else -#define fsl_readl(addr) readl(addr) -#define fsl_writel(val32, addr) writel(val32, addr) -#endif - -/******************************************************************** - * Internal Used Function -********************************************************************/ -/*----------------------------------------------------------------- - * done() - retire a request; caller blocked irqs - * @status : request status to be set, only works when - * request is still in progress. - *--------------------------------------------------------------*/ -static void done(struct fsl_ep *ep, struct fsl_req *req, int status) -{ - struct fsl_udc *udc = NULL; - unsigned char stopped = ep->stopped; - struct ep_td_struct *curr_td, *next_td; - int j; - - udc = (struct fsl_udc *)ep->udc; - /* Removed the req from fsl_ep->queue */ - list_del_init(&req->queue); - - /* req.status should be set as -EINPROGRESS in ep_queue() */ - if (req->req.status == -EINPROGRESS) - req->req.status = status; - else - status = req->req.status; - - /* Free dtd for the request */ - next_td = req->head; - for (j = 0; j < req->dtd_count; j++) { - curr_td = next_td; - if (j != req->dtd_count - 1) { - next_td = curr_td->next_td_virt; - } - dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma); - } - - if (req->mapped) { - dma_unmap_single(ep->udc->gadget.dev.parent, - req->req.dma, req->req.length, - ep_is_in(ep) - ? DMA_TO_DEVICE - : DMA_FROM_DEVICE); - req->req.dma = DMA_ADDR_INVALID; - req->mapped = 0; - } else - dma_sync_single_for_cpu(ep->udc->gadget.dev.parent, - req->req.dma, req->req.length, - ep_is_in(ep) - ? DMA_TO_DEVICE - : DMA_FROM_DEVICE); - - if (status && (status != -ESHUTDOWN)) - VDBG("complete %s req %p stat %d len %u/%u", - ep->ep.name, &req->req, status, - req->req.actual, req->req.length); - - ep->stopped = 1; - - spin_unlock(&ep->udc->lock); - /* complete() is from gadget layer, - * eg fsg->bulk_in_complete() */ - if (req->req.complete) - req->req.complete(&ep->ep, &req->req); - - spin_lock(&ep->udc->lock); - ep->stopped = stopped; -} - -/*----------------------------------------------------------------- - * nuke(): delete all requests related to this ep - * called with spinlock held - *--------------------------------------------------------------*/ -static void nuke(struct fsl_ep *ep, int status) -{ - ep->stopped = 1; - - /* Flush fifo */ - fsl_ep_fifo_flush(&ep->ep); - - /* Whether this eq has request linked */ - while (!list_empty(&ep->queue)) { - struct fsl_req *req = NULL; - - req = list_entry(ep->queue.next, struct fsl_req, queue); - done(ep, req, status); - } -} - -/*------------------------------------------------------------------ - Internal Hardware related function - ------------------------------------------------------------------*/ - -static int dr_controller_setup(struct fsl_udc *udc) -{ - unsigned int tmp = 0, portctrl = 0, ctrl = 0; - unsigned long timeout; -#define FSL_UDC_RESET_TIMEOUT 1000 - - /* Stop and reset the usb controller */ - tmp = fsl_readl(&dr_regs->usbcmd); - tmp &= ~USB_CMD_RUN_STOP; - fsl_writel(tmp, &dr_regs->usbcmd); - - tmp = fsl_readl(&dr_regs->usbcmd); - tmp |= USB_CMD_CTRL_RESET; - fsl_writel(tmp, &dr_regs->usbcmd); - - /* Wait for reset to complete */ - timeout = jiffies + FSL_UDC_RESET_TIMEOUT; - while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) { - if (time_after(jiffies, timeout)) { - ERR("udc reset timeout!\n"); - return -ETIMEDOUT; - } - cpu_relax(); - } - - /* Set the controller as device mode */ - tmp = fsl_readl(&dr_regs->usbmode); - tmp |= USB_MODE_CTRL_MODE_DEVICE; - /* Disable Setup Lockout */ - tmp |= USB_MODE_SETUP_LOCK_OFF; - fsl_writel(tmp, &dr_regs->usbmode); - - /* Clear the setup status */ - fsl_writel(0, &dr_regs->usbsts); - - tmp = udc->ep_qh_dma; - tmp &= USB_EP_LIST_ADDRESS_MASK; - fsl_writel(tmp, &dr_regs->endpointlistaddr); - - VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x", - udc->ep_qh, (int)tmp, - fsl_readl(&dr_regs->endpointlistaddr)); - - /* Config PHY interface */ - portctrl = fsl_readl(&dr_regs->portsc1); - portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH); - switch (udc->phy_mode) { - case FSL_USB2_PHY_ULPI: - portctrl |= PORTSCX_PTS_ULPI; - break; - case FSL_USB2_PHY_UTMI_WIDE: - portctrl |= PORTSCX_PTW_16BIT; - /* fall through */ - case FSL_USB2_PHY_UTMI: - portctrl |= PORTSCX_PTS_UTMI; - break; - case FSL_USB2_PHY_SERIAL: - portctrl |= PORTSCX_PTS_FSLS; - break; - default: - return -EINVAL; - } - fsl_writel(portctrl, &dr_regs->portsc1); - - /* Config control enable i/o output, cpu endian register */ - ctrl = __raw_readl(&usb_sys_regs->control); - ctrl |= USB_CTRL_IOENB; - __raw_writel(ctrl, &usb_sys_regs->control); - -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - /* Turn on cache snooping hardware, since some PowerPC platforms - * wholly rely on hardware to deal with cache coherent. */ - - /* Setup Snooping for all the 4GB space */ - tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */ - __raw_writel(tmp, &usb_sys_regs->snoop1); - tmp |= 0x80000000; /* starts from 0x8000000, size 2G */ - __raw_writel(tmp, &usb_sys_regs->snoop2); -#endif - - return 0; -} - -/* Enable DR irq and set controller to run state */ -static void dr_controller_run(struct fsl_udc *udc) -{ - u32 temp; - - /* Enable DR irq reg */ - temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN - | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN - | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN; - - fsl_writel(temp, &dr_regs->usbintr); - - /* Clear stopped bit */ - udc->stopped = 0; - - /* Set the controller as device mode */ - temp = fsl_readl(&dr_regs->usbmode); - temp |= USB_MODE_CTRL_MODE_DEVICE; - fsl_writel(temp, &dr_regs->usbmode); - - /* Set controller to Run */ - temp = fsl_readl(&dr_regs->usbcmd); - temp |= USB_CMD_RUN_STOP; - fsl_writel(temp, &dr_regs->usbcmd); - - return; -} - -static void dr_controller_stop(struct fsl_udc *udc) -{ - unsigned int tmp; - - /* disable all INTR */ - fsl_writel(0, &dr_regs->usbintr); - - /* Set stopped bit for isr */ - udc->stopped = 1; - - /* disable IO output */ -/* usb_sys_regs->control = 0; */ - - /* set controller to Stop */ - tmp = fsl_readl(&dr_regs->usbcmd); - tmp &= ~USB_CMD_RUN_STOP; - fsl_writel(tmp, &dr_regs->usbcmd); - - return; -} - -static void dr_ep_setup(unsigned char ep_num, unsigned char dir, - unsigned char ep_type) -{ - unsigned int tmp_epctrl = 0; - - tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - if (dir) { - if (ep_num) - tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST; - tmp_epctrl |= EPCTRL_TX_ENABLE; - tmp_epctrl |= ((unsigned int)(ep_type) - << EPCTRL_TX_EP_TYPE_SHIFT); - } else { - if (ep_num) - tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST; - tmp_epctrl |= EPCTRL_RX_ENABLE; - tmp_epctrl |= ((unsigned int)(ep_type) - << EPCTRL_RX_EP_TYPE_SHIFT); - } - - fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]); -} - -static void -dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value) -{ - u32 tmp_epctrl = 0; - - tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - - if (value) { - /* set the stall bit */ - if (dir) - tmp_epctrl |= EPCTRL_TX_EP_STALL; - else - tmp_epctrl |= EPCTRL_RX_EP_STALL; - } else { - /* clear the stall bit and reset data toggle */ - if (dir) { - tmp_epctrl &= ~EPCTRL_TX_EP_STALL; - tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST; - } else { - tmp_epctrl &= ~EPCTRL_RX_EP_STALL; - tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST; - } - } - fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]); -} - -/* Get stall status of a specific ep - Return: 0: not stalled; 1:stalled */ -static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir) -{ - u32 epctrl; - - epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - if (dir) - return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0; - else - return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0; -} - -/******************************************************************** - Internal Structure Build up functions -********************************************************************/ - -/*------------------------------------------------------------------ -* struct_ep_qh_setup(): set the Endpoint Capabilites field of QH - * @zlt: Zero Length Termination Select (1: disable; 0: enable) - * @mult: Mult field - ------------------------------------------------------------------*/ -static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num, - unsigned char dir, unsigned char ep_type, - unsigned int max_pkt_len, - unsigned int zlt, unsigned char mult) -{ - struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir]; - unsigned int tmp = 0; - - /* set the Endpoint Capabilites in QH */ - switch (ep_type) { - case USB_ENDPOINT_XFER_CONTROL: - /* Interrupt On Setup (IOS). for control ep */ - tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) - | EP_QUEUE_HEAD_IOS; - break; - case USB_ENDPOINT_XFER_ISOC: - tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) - | (mult << EP_QUEUE_HEAD_MULT_POS); - break; - case USB_ENDPOINT_XFER_BULK: - case USB_ENDPOINT_XFER_INT: - tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS; - break; - default: - VDBG("error ep type is %d", ep_type); - return; - } - if (zlt) - tmp |= EP_QUEUE_HEAD_ZLT_SEL; - - p_QH->max_pkt_length = cpu_to_le32(tmp); - p_QH->next_dtd_ptr = 1; - p_QH->size_ioc_int_sts = 0; - - return; -} - -/* Setup qh structure and ep register for ep0. */ -static void ep0_setup(struct fsl_udc *udc) -{ - /* the intialization of an ep includes: fields in QH, Regs, - * fsl_ep struct */ - struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL, - USB_MAX_CTRL_PAYLOAD, 0, 0); - struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL, - USB_MAX_CTRL_PAYLOAD, 0, 0); - dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL); - dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL); - - return; - -} - -/*********************************************************************** - Endpoint Management Functions -***********************************************************************/ - -/*------------------------------------------------------------------------- - * when configurations are set, or when interface settings change - * for example the do_set_interface() in gadget layer, - * the driver will enable or disable the relevant endpoints - * ep0 doesn't use this routine. It is always enabled. --------------------------------------------------------------------------*/ -static int fsl_ep_enable(struct usb_ep *_ep, - const struct usb_endpoint_descriptor *desc) -{ - struct fsl_udc *udc = NULL; - struct fsl_ep *ep = NULL; - unsigned short max = 0; - unsigned char mult = 0, zlt; - int retval = -EINVAL; - unsigned long flags = 0; - - ep = container_of(_ep, struct fsl_ep, ep); - - /* catch various bogus parameters */ - if (!_ep || !desc || ep->desc - || (desc->bDescriptorType != USB_DT_ENDPOINT)) - return -EINVAL; - - udc = ep->udc; - - if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN)) - return -ESHUTDOWN; - - max = le16_to_cpu(desc->wMaxPacketSize); - - /* Disable automatic zlp generation. Driver is reponsible to indicate - * explicitly through req->req.zero. This is needed to enable multi-td - * request. */ - zlt = 1; - - /* Assume the max packet size from gadget is always correct */ - switch (desc->bmAttributes & 0x03) { - case USB_ENDPOINT_XFER_CONTROL: - case USB_ENDPOINT_XFER_BULK: - case USB_ENDPOINT_XFER_INT: - /* mult = 0. Execute N Transactions as demonstrated by - * the USB variable length packet protocol where N is - * computed using the Maximum Packet Length (dQH) and - * the Total Bytes field (dTD) */ - mult = 0; - break; - case USB_ENDPOINT_XFER_ISOC: - /* 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 en_done; - break; - default: - goto en_done; - } - - spin_lock_irqsave(&udc->lock, flags); - ep->ep.maxpacket = max; - ep->desc = desc; - ep->stopped = 0; - - /* Controller related setup */ - /* Init EPx Queue Head (Ep Capabilites field in QH - * according to max, zlt, mult) */ - struct_ep_qh_setup(udc, (unsigned char) ep_index(ep), - (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN) - ? USB_SEND : USB_RECV), - (unsigned char) (desc->bmAttributes - & USB_ENDPOINT_XFERTYPE_MASK), - max, zlt, mult); - - /* Init endpoint ctrl register */ - dr_ep_setup((unsigned char) ep_index(ep), - (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN) - ? USB_SEND : USB_RECV), - (unsigned char) (desc->bmAttributes - & USB_ENDPOINT_XFERTYPE_MASK)); - - spin_unlock_irqrestore(&udc->lock, flags); - retval = 0; - - VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name, - ep->desc->bEndpointAddress & 0x0f, - (desc->bEndpointAddress & USB_DIR_IN) - ? "in" : "out", max); -en_done: - return retval; -} - -/*--------------------------------------------------------------------- - * @ep : the ep being unconfigured. May not be ep0 - * Any pending and uncomplete req will complete with status (-ESHUTDOWN) -*---------------------------------------------------------------------*/ -static int fsl_ep_disable(struct usb_ep *_ep) -{ - struct fsl_udc *udc = NULL; - struct fsl_ep *ep = NULL; - unsigned long flags = 0; - u32 epctrl; - int ep_num; - - ep = container_of(_ep, struct fsl_ep, ep); - if (!_ep || !ep->desc) { - VDBG("%s not enabled", _ep ? ep->ep.name : NULL); - return -EINVAL; - } - - /* disable ep on controller */ - ep_num = ep_index(ep); - epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - if (ep_is_in(ep)) - epctrl &= ~EPCTRL_TX_ENABLE; - else - epctrl &= ~EPCTRL_RX_ENABLE; - fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]); - - udc = (struct fsl_udc *)ep->udc; - spin_lock_irqsave(&udc->lock, flags); - - /* nuke all pending requests (does flush) */ - nuke(ep, -ESHUTDOWN); - - ep->desc = NULL; - ep->stopped = 1; - spin_unlock_irqrestore(&udc->lock, flags); - - VDBG("disabled %s OK", _ep->name); - return 0; -} - -/*--------------------------------------------------------------------- - * allocate a request object used by this endpoint - * the main operation is to insert the req->queue to the eq->queue - * Returns the request, or null if one could not be allocated -*---------------------------------------------------------------------*/ -static struct usb_request * -fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) -{ - struct fsl_req *req = NULL; - - req = kzalloc(sizeof *req, gfp_flags); - if (!req) - return NULL; - - req->req.dma = DMA_ADDR_INVALID; - INIT_LIST_HEAD(&req->queue); - - return &req->req; -} - -static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req) -{ - struct fsl_req *req = NULL; - - req = container_of(_req, struct fsl_req, req); - - if (_req) - kfree(req); -} - -/*-------------------------------------------------------------------------*/ -static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req) -{ - int i = ep_index(ep) * 2 + ep_is_in(ep); - u32 temp, bitmask, tmp_stat; - struct ep_queue_head *dQH = &ep->udc->ep_qh[i]; - - /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr); - VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */ - - bitmask = ep_is_in(ep) - ? (1 << (ep_index(ep) + 16)) - : (1 << (ep_index(ep))); - - /* check if the pipe is empty */ - if (!(list_empty(&ep->queue))) { - /* Add td to the end */ - struct fsl_req *lastreq; - lastreq = list_entry(ep->queue.prev, struct fsl_req, queue); - lastreq->tail->next_td_ptr = - cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK); - /* Read prime bit, if 1 goto done */ - if (fsl_readl(&dr_regs->endpointprime) & bitmask) - goto out; - - do { - /* Set ATDTW bit in USBCMD */ - temp = fsl_readl(&dr_regs->usbcmd); - fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd); - - /* Read correct status bit */ - tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask; - - } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW)); - - /* Write ATDTW bit to 0 */ - temp = fsl_readl(&dr_regs->usbcmd); - fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd); - - if (tmp_stat) - goto out; - } - - /* Write dQH next pointer and terminate bit to 0 */ - temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK; - dQH->next_dtd_ptr = cpu_to_le32(temp); - - /* Clear active and halt bit */ - temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE - | EP_QUEUE_HEAD_STATUS_HALT)); - dQH->size_ioc_int_sts &= temp; - - /* Ensure that updates to the QH will occure before priming. */ - wmb(); - - /* Prime endpoint by writing 1 to ENDPTPRIME */ - temp = ep_is_in(ep) - ? (1 << (ep_index(ep) + 16)) - : (1 << (ep_index(ep))); - fsl_writel(temp, &dr_regs->endpointprime); -out: - return; -} - -/* Fill in the dTD structure - * @req: request that the transfer belongs to - * @length: return actually data length of the dTD - * @dma: return dma address of the dTD - * @is_last: return flag if it is the last dTD of the request - * return: pointer to the built dTD */ -static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length, - dma_addr_t *dma, int *is_last) -{ - u32 swap_temp; - struct ep_td_struct *dtd; - - /* how big will this transfer be? */ - *length = min(req->req.length - req->req.actual, - (unsigned)EP_MAX_LENGTH_TRANSFER); - - dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma); - if (dtd == NULL) - return dtd; - - dtd->td_dma = *dma; - /* Clear reserved field */ - swap_temp = cpu_to_le32(dtd->size_ioc_sts); - swap_temp &= ~DTD_RESERVED_FIELDS; - dtd->size_ioc_sts = cpu_to_le32(swap_temp); - - /* Init all of buffer page pointers */ - swap_temp = (u32) (req->req.dma + req->req.actual); - dtd->buff_ptr0 = cpu_to_le32(swap_temp); - dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000); - dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000); - dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000); - dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000); - - req->req.actual += *length; - - /* zlp is needed if req->req.zero is set */ - 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) - VDBG("multi-dtd request!"); - /* Fill in the transfer size; set active bit */ - swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE); - - /* Enable interrupt for the last dtd of a request */ - if (*is_last && !req->req.no_interrupt) - swap_temp |= DTD_IOC; - - dtd->size_ioc_sts = cpu_to_le32(swap_temp); - - mb(); - - VDBG("length = %d address= 0x%x", *length, (int)*dma); - - return dtd; -} - -/* Generate dtd chain for a request */ -static int fsl_req_to_dtd(struct fsl_req *req) -{ - unsigned count; - int is_last; - int is_first =1; - struct ep_td_struct *last_dtd = NULL, *dtd; - dma_addr_t dma; - - do { - dtd = fsl_build_dtd(req, &count, &dma, &is_last); - if (dtd == NULL) - return -ENOMEM; - - if (is_first) { - is_first = 0; - req->head = dtd; - } else { - last_dtd->next_td_ptr = cpu_to_le32(dma); - last_dtd->next_td_virt = dtd; - } - last_dtd = dtd; - - req->dtd_count++; - } while (!is_last); - - dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE); - - req->tail = dtd; - - return 0; -} - -/* queues (submits) an I/O request to an endpoint */ -static int -fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) -{ - struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep); - struct fsl_req *req = container_of(_req, struct fsl_req, req); - struct fsl_udc *udc; - unsigned long flags; - int is_iso = 0; - - /* catch various bogus parameters */ - if (!_req || !req->req.complete || !req->req.buf - || !list_empty(&req->queue)) { - VDBG("%s, bad params", __func__); - return -EINVAL; - } - if (unlikely(!_ep || !ep->desc)) { - VDBG("%s, bad ep", __func__); - return -EINVAL; - } - if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { - if (req->req.length > ep->ep.maxpacket) - return -EMSGSIZE; - is_iso = 1; - } - - udc = ep->udc; - if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) - return -ESHUTDOWN; - - req->ep = ep; - - /* map virtual address to hardware */ - if (req->req.dma == DMA_ADDR_INVALID) { - req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, - req->req.buf, - req->req.length, ep_is_in(ep) - ? DMA_TO_DEVICE - : DMA_FROM_DEVICE); - req->mapped = 1; - } else { - dma_sync_single_for_device(ep->udc->gadget.dev.parent, - req->req.dma, req->req.length, - ep_is_in(ep) - ? DMA_TO_DEVICE - : DMA_FROM_DEVICE); - req->mapped = 0; - } - - req->req.status = -EINPROGRESS; - req->req.actual = 0; - req->dtd_count = 0; - - spin_lock_irqsave(&udc->lock, flags); - - /* build dtds and push them to device queue */ - if (!fsl_req_to_dtd(req)) { - fsl_queue_td(ep, req); - } else { - spin_unlock_irqrestore(&udc->lock, flags); - return -ENOMEM; - } - - /* Update ep0 state */ - if ((ep_index(ep) == 0)) - udc->ep0_state = DATA_STATE_XMIT; - - /* irq handler advances the queue */ - if (req != NULL) - list_add_tail(&req->queue, &ep->queue); - spin_unlock_irqrestore(&udc->lock, flags); - - return 0; -} - -/* dequeues (cancels, unlinks) an I/O request from an endpoint */ -static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) -{ - struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep); - struct fsl_req *req; - unsigned long flags; - int ep_num, stopped, ret = 0; - u32 epctrl; - - if (!_ep || !_req) - return -EINVAL; - - spin_lock_irqsave(&ep->udc->lock, flags); - stopped = ep->stopped; - - /* Stop the ep before we deal with the queue */ - ep->stopped = 1; - ep_num = ep_index(ep); - epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - if (ep_is_in(ep)) - epctrl &= ~EPCTRL_TX_ENABLE; - else - epctrl &= ~EPCTRL_RX_ENABLE; - fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]); - - /* 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) { - ret = -EINVAL; - goto out; - } - - /* The request is in progress, or completed but not dequeued */ - if (ep->queue.next == &req->queue) { - _req->status = -ECONNRESET; - fsl_ep_fifo_flush(_ep); /* flush current transfer */ - - /* The request isn't the last request in this ep queue */ - if (req->queue.next != &ep->queue) { - struct ep_queue_head *qh; - struct fsl_req *next_req; - - qh = ep->qh; - next_req = list_entry(req->queue.next, struct fsl_req, - queue); - - /* Point the QH to the first TD of next request */ - fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr); - } - - /* The request hasn't been processed, patch up the TD chain */ - } else { - struct fsl_req *prev_req; - - prev_req = list_entry(req->queue.prev, struct fsl_req, queue); - fsl_writel(fsl_readl(&req->tail->next_td_ptr), - &prev_req->tail->next_td_ptr); - - } - - done(ep, req, -ECONNRESET); - - /* Enable EP */ -out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]); - if (ep_is_in(ep)) - epctrl |= EPCTRL_TX_ENABLE; - else - epctrl |= EPCTRL_RX_ENABLE; - fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]); - ep->stopped = stopped; - - spin_unlock_irqrestore(&ep->udc->lock, flags); - return ret; -} - -/*-------------------------------------------------------------------------*/ - -/*----------------------------------------------------------------- - * modify the endpoint halt feature - * @ep: the non-isochronous endpoint being stalled - * @value: 1--set halt 0--clear halt - * Returns zero, or a negative error code. -*----------------------------------------------------------------*/ -static int fsl_ep_set_halt(struct usb_ep *_ep, int value) -{ - struct fsl_ep *ep = NULL; - unsigned long flags = 0; - int status = -EOPNOTSUPP; /* operation not supported */ - unsigned char ep_dir = 0, ep_num = 0; - struct fsl_udc *udc = NULL; - - ep = container_of(_ep, struct fsl_ep, ep); - udc = ep->udc; - if (!_ep || !ep->desc) { - status = -EINVAL; - goto out; - } - - if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { - status = -EOPNOTSUPP; - goto out; - } - - /* Attempt to halt IN ep will fail if any transfer requests - * are still queue */ - if (value && ep_is_in(ep) && !list_empty(&ep->queue)) { - status = -EAGAIN; - goto out; - } - - status = 0; - ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV; - ep_num = (unsigned char)(ep_index(ep)); - spin_lock_irqsave(&ep->udc->lock, flags); - dr_ep_change_stall(ep_num, ep_dir, value); - spin_unlock_irqrestore(&ep->udc->lock, flags); - - if (ep_index(ep) == 0) { - udc->ep0_state = WAIT_FOR_SETUP; - udc->ep0_dir = 0; - } -out: - VDBG(" %s %s halt stat %d", ep->ep.name, - value ? "set" : "clear", status); - - return status; -} - -static void fsl_ep_fifo_flush(struct usb_ep *_ep) -{ - struct fsl_ep *ep; - int ep_num, ep_dir; - u32 bits; - unsigned long timeout; -#define FSL_UDC_FLUSH_TIMEOUT 1000 - - if (!_ep) { - return; - } else { - ep = container_of(_ep, struct fsl_ep, ep); - if (!ep->desc) - return; - } - ep_num = ep_index(ep); - ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV; - - if (ep_num == 0) - bits = (1 << 16) | 1; - else if (ep_dir == USB_SEND) - bits = 1 << (16 + ep_num); - else - bits = 1 << ep_num; - - timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT; - do { - fsl_writel(bits, &dr_regs->endptflush); - - /* Wait until flush complete */ - while (fsl_readl(&dr_regs->endptflush)) { - if (time_after(jiffies, timeout)) { - ERR("ep flush timeout\n"); - return; - } - cpu_relax(); - } - /* See if we need to flush again */ - } while (fsl_readl(&dr_regs->endptstatus) & bits); -} - -static struct usb_ep_ops fsl_ep_ops = { - .enable = fsl_ep_enable, - .disable = fsl_ep_disable, - - .alloc_request = fsl_alloc_request, - .free_request = fsl_free_request, - - .queue = fsl_ep_queue, - .dequeue = fsl_ep_dequeue, - - .set_halt = fsl_ep_set_halt, - .fifo_flush = fsl_ep_fifo_flush, /* flush fifo */ -}; - -/*------------------------------------------------------------------------- - Gadget Driver Layer Operations --------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------- - * Get the current frame number (from DR frame_index Reg ) - *----------------------------------------------------------------------*/ -static int fsl_get_frame(struct usb_gadget *gadget) -{ - return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS); -} - -/*----------------------------------------------------------------------- - * Tries to wake up the host connected to this gadget - -----------------------------------------------------------------------*/ -static int fsl_wakeup(struct usb_gadget *gadget) -{ - struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget); - u32 portsc; - - /* Remote wakeup feature not enabled by host */ - if (!udc->remote_wakeup) - return -ENOTSUPP; - - portsc = fsl_readl(&dr_regs->portsc1); - /* not suspended? */ - if (!(portsc & PORTSCX_PORT_SUSPEND)) - return 0; - /* trigger force resume */ - portsc |= PORTSCX_PORT_FORCE_RESUME; - fsl_writel(portsc, &dr_regs->portsc1); - return 0; -} - -static int can_pullup(struct fsl_udc *udc) -{ - return udc->driver && udc->softconnect && udc->vbus_active; -} - -/* Notify controller that VBUS is powered, Called by whatever - detects VBUS sessions */ -static int fsl_vbus_session(struct usb_gadget *gadget, int is_active) -{ - struct fsl_udc *udc; - unsigned long flags; - - udc = container_of(gadget, struct fsl_udc, gadget); - spin_lock_irqsave(&udc->lock, flags); - VDBG("VBUS %s", is_active ? "on" : "off"); - udc->vbus_active = (is_active != 0); - if (can_pullup(udc)) - fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP), - &dr_regs->usbcmd); - else - fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP), - &dr_regs->usbcmd); - spin_unlock_irqrestore(&udc->lock, flags); - return 0; -} - -/* constrain controller's VBUS power usage - * This call is used by gadget drivers during SET_CONFIGURATION calls, - * reporting how much power the device may consume. For example, this - * could affect how quickly batteries are recharged. - * - * Returns zero on success, else negative errno. - */ -static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA) -{ - struct fsl_udc *udc; - - udc = container_of(gadget, struct fsl_udc, gadget); - if (udc->transceiver) - return otg_set_power(udc->transceiver, mA); - return -ENOTSUPP; -} - -/* Change Data+ pullup status - * this func is used by usb_gadget_connect/disconnet - */ -static int fsl_pullup(struct usb_gadget *gadget, int is_on) -{ - struct fsl_udc *udc; - - udc = container_of(gadget, struct fsl_udc, gadget); - udc->softconnect = (is_on != 0); - if (can_pullup(udc)) - fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP), - &dr_regs->usbcmd); - else - fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP), - &dr_regs->usbcmd); - - return 0; -} - -/* defined in gadget.h */ -static struct usb_gadget_ops fsl_gadget_ops = { - .get_frame = fsl_get_frame, - .wakeup = fsl_wakeup, -/* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */ - .vbus_session = fsl_vbus_session, - .vbus_draw = fsl_vbus_draw, - .pullup = fsl_pullup, -}; - -/* Set protocol stall on ep0, protocol stall will automatically be cleared - on new transaction */ -static void ep0stall(struct fsl_udc *udc) -{ - u32 tmp; - - /* must set tx and rx to stall at the same time */ - tmp = fsl_readl(&dr_regs->endptctrl[0]); - tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL; - fsl_writel(tmp, &dr_regs->endptctrl[0]); - udc->ep0_state = WAIT_FOR_SETUP; - udc->ep0_dir = 0; -} - -/* Prime a status phase for ep0 */ -static int ep0_prime_status(struct fsl_udc *udc, int direction) -{ - struct fsl_req *req = udc->status_req; - struct fsl_ep *ep; - - if (direction == EP_DIR_IN) - udc->ep0_dir = USB_DIR_IN; - else - udc->ep0_dir = USB_DIR_OUT; - - ep = &udc->eps[0]; - udc->ep0_state = WAIT_FOR_OUT_STATUS; - - req->ep = ep; - req->req.length = 0; - req->req.status = -EINPROGRESS; - req->req.actual = 0; - req->req.complete = NULL; - req->dtd_count = 0; - - if (fsl_req_to_dtd(req) == 0) - fsl_queue_td(ep, req); - else - return -ENOMEM; - - list_add_tail(&req->queue, &ep->queue); - - return 0; -} - -static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe) -{ - struct fsl_ep *ep = get_ep_by_pipe(udc, pipe); - - if (ep->name) - nuke(ep, -ESHUTDOWN); -} - -/* - * ch9 Set address - */ -static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length) -{ - /* Save the new address to device struct */ - udc->device_address = (u8) value; - /* Update usb state */ - udc->usb_state = USB_STATE_ADDRESS; - /* Status phase */ - if (ep0_prime_status(udc, EP_DIR_IN)) - ep0stall(udc); -} - -/* - * ch9 Get status - */ -static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value, - u16 index, u16 length) -{ - u16 tmp = 0; /* Status, cpu endian */ - struct fsl_req *req; - struct fsl_ep *ep; - - ep = &udc->eps[0]; - - if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) { - /* Get device status */ - tmp = 1 << USB_DEVICE_SELF_POWERED; - tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP; - } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) { - /* Get interface status */ - /* We don't have interface information in udc driver */ - tmp = 0; - } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { - /* Get endpoint status */ - struct fsl_ep *target_ep; - - target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index)); - - /* stall if endpoint doesn't exist */ - if (!target_ep->desc) - goto stall; - tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep)) - << USB_ENDPOINT_HALT; - } - - udc->ep0_dir = USB_DIR_IN; - /* Borrow the per device status_req */ - req = udc->status_req; - /* Fill in the reqest structure */ - *((u16 *) req->req.buf) = cpu_to_le16(tmp); - 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 ((fsl_req_to_dtd(req) == 0)) - fsl_queue_td(ep, req); - else /* no mem */ - goto stall; - - list_add_tail(&req->queue, &ep->queue); - udc->ep0_state = DATA_STATE_XMIT; - return; -stall: - ep0stall(udc); -} - -static void setup_received_irq(struct fsl_udc *udc, - 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); - - udc_reset_ep_queue(udc, 0); - - /* We process some stardard setup requests here */ - switch (setup->bRequest) { - case USB_REQ_GET_STATUS: - /* Data+Status phase from udc */ - if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) - != (USB_DIR_IN | USB_TYPE_STANDARD)) - break; - ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength); - return; - - case USB_REQ_SET_ADDRESS: - /* Status phase from udc */ - if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD - | USB_RECIP_DEVICE)) - break; - ch9setaddress(udc, wValue, wIndex, wLength); - return; - - case USB_REQ_CLEAR_FEATURE: - case USB_REQ_SET_FEATURE: - /* Status phase from udc */ - { - int rc = -EOPNOTSUPP; - - if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK)) - == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) { - int pipe = get_pipe_by_windex(wIndex); - struct fsl_ep *ep; - - if (wValue != 0 || wLength != 0 || pipe > udc->max_ep) - break; - ep = get_ep_by_pipe(udc, pipe); - - spin_unlock(&udc->lock); - rc = fsl_ep_set_halt(&ep->ep, - (setup->bRequest == USB_REQ_SET_FEATURE) - ? 1 : 0); - spin_lock(&udc->lock); - - } else if ((setup->bRequestType & (USB_RECIP_MASK - | USB_TYPE_MASK)) == (USB_RECIP_DEVICE - | USB_TYPE_STANDARD)) { - /* Note: The driver has not include OTG support yet. - * This will be set when OTG support is added */ - if (!gadget_is_otg(&udc->gadget)) - break; - else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE) - udc->gadget.b_hnp_enable = 1; - else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT) - udc->gadget.a_hnp_support = 1; - else if (setup->bRequest == - USB_DEVICE_A_ALT_HNP_SUPPORT) - udc->gadget.a_alt_hnp_support = 1; - else - break; - rc = 0; - } else - break; - - if (rc == 0) { - if (ep0_prime_status(udc, EP_DIR_IN)) - ep0stall(udc); - } - return; - } - - default: - break; - } - - /* Requests handled by gadget */ - if (wLength) { - /* Data phase from gadget, status phase from udc */ - udc->ep0_dir = (setup->bRequestType & USB_DIR_IN) - ? USB_DIR_IN : USB_DIR_OUT; - spin_unlock(&udc->lock); - if (udc->driver->setup(&udc->gadget, - &udc->local_setup_buff) < 0) - ep0stall(udc); - spin_lock(&udc->lock); - udc->ep0_state = (setup->bRequestType & USB_DIR_IN) - ? DATA_STATE_XMIT : DATA_STATE_RECV; - } else { - /* No data phase, IN status from gadget */ - udc->ep0_dir = USB_DIR_IN; - spin_unlock(&udc->lock); - if (udc->driver->setup(&udc->gadget, - &udc->local_setup_buff) < 0) - ep0stall(udc); - spin_lock(&udc->lock); - udc->ep0_state = WAIT_FOR_OUT_STATUS; - } -} - -/* Process request for Data or Status phase of ep0 - * prime status phase if needed */ -static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0, - struct fsl_req *req) -{ - if (udc->usb_state == USB_STATE_ADDRESS) { - /* Set the new address */ - u32 new_address = (u32) udc->device_address; - fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS, - &dr_regs->deviceaddr); - } - - done(ep0, req, 0); - - switch (udc->ep0_state) { - case DATA_STATE_XMIT: - /* receive status phase */ - if (ep0_prime_status(udc, EP_DIR_OUT)) - ep0stall(udc); - break; - case DATA_STATE_RECV: - /* send status phase */ - if (ep0_prime_status(udc, EP_DIR_IN)) - ep0stall(udc); - break; - case WAIT_FOR_OUT_STATUS: - udc->ep0_state = WAIT_FOR_SETUP; - break; - case WAIT_FOR_SETUP: - ERR("Unexpect ep0 packets\n"); - break; - default: - ep0stall(udc); - break; - } -} - -/* Tripwire mechanism to ensure a setup packet payload is extracted without - * being corrupted by another incoming setup packet */ -static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr) -{ - u32 temp; - struct ep_queue_head *qh; - - qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT]; - - /* Clear bit in ENDPTSETUPSTAT */ - temp = fsl_readl(&dr_regs->endptsetupstat); - fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat); - - /* while a hazard exists when setup package arrives */ - do { - /* Set Setup Tripwire */ - temp = fsl_readl(&dr_regs->usbcmd); - fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd); - - /* Copy the setup packet to local buffer */ - memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8); - } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW)); - - /* Clear Setup Tripwire */ - temp = fsl_readl(&dr_regs->usbcmd); - fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd); -} - -/* process-ep_req(): free the completed Tds for this req */ -static int process_ep_req(struct fsl_udc *udc, int pipe, - struct fsl_req *curr_req) -{ - struct ep_td_struct *curr_td; - int td_complete, actual, remaining_length, j, tmp; - int status = 0; - int errors = 0; - struct ep_queue_head *curr_qh = &udc->ep_qh[pipe]; - int direction = pipe % 2; - - curr_td = curr_req->head; - td_complete = 0; - actual = curr_req->req.length; - - for (j = 0; j < curr_req->dtd_count; j++) { - remaining_length = (le32_to_cpu(curr_td->size_ioc_sts) - & DTD_PACKET_SIZE) - >> DTD_LENGTH_BIT_POS; - actual -= remaining_length; - - if ((errors = le32_to_cpu(curr_td->size_ioc_sts) & - DTD_ERROR_MASK)) { - if (errors & DTD_STATUS_HALTED) { - ERR("dTD error %08x QH=%d\n", errors, pipe); - /* Clear the errors and Halt condition */ - tmp = le32_to_cpu(curr_qh->size_ioc_int_sts); - tmp &= ~errors; - curr_qh->size_ioc_int_sts = cpu_to_le32(tmp); - status = -EPIPE; - /* FIXME: continue with next queued TD? */ - - break; - } - if (errors & DTD_STATUS_DATA_BUFF_ERR) { - VDBG("Transfer overflow"); - status = -EPROTO; - break; - } else if (errors & DTD_STATUS_TRANSACTION_ERR) { - VDBG("ISO error"); - status = -EILSEQ; - break; - } else - ERR("Unknown error has occured (0x%x)!\n", - errors); - - } else if (le32_to_cpu(curr_td->size_ioc_sts) - & DTD_STATUS_ACTIVE) { - VDBG("Request not complete"); - status = REQ_UNCOMPLETE; - return status; - } else if (remaining_length) { - if (direction) { - VDBG("Transmit dTD remaining length not zero"); - status = -EPROTO; - break; - } else { - td_complete++; - break; - } - } else { - td_complete++; - VDBG("dTD transmitted successful"); - } - - if (j != curr_req->dtd_count - 1) - curr_td = (struct ep_td_struct *)curr_td->next_td_virt; - } - - if (status) - return status; - - curr_req->req.actual = actual; - - return 0; -} - -/* Process a DTD completion interrupt */ -static void dtd_complete_irq(struct fsl_udc *udc) -{ - u32 bit_pos; - int i, ep_num, direction, bit_mask, status; - struct fsl_ep *curr_ep; - struct fsl_req *curr_req, *temp_req; - - /* Clear the bits in the register */ - bit_pos = fsl_readl(&dr_regs->endptcomplete); - fsl_writel(bit_pos, &dr_regs->endptcomplete); - - if (!bit_pos) - return; - - for (i = 0; i < udc->max_ep * 2; i++) { - ep_num = i >> 1; - direction = i % 2; - - bit_mask = 1 << (ep_num + 16 * direction); - - if (!(bit_pos & bit_mask)) - continue; - - curr_ep = get_ep_by_pipe(udc, i); - - /* If the ep is configured */ - if (curr_ep->name == NULL) { - WARNING("Invalid EP?"); - continue; - } - - /* process the req queue until an uncomplete request */ - list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue, - queue) { - status = process_ep_req(udc, i, curr_req); - - VDBG("status of process_ep_req= %d, ep = %d", - status, ep_num); - if (status == REQ_UNCOMPLETE) - break; - /* write back status to req */ - curr_req->req.status = status; - - if (ep_num == 0) { - ep0_req_complete(udc, curr_ep, curr_req); - break; - } else - done(curr_ep, curr_req, status); - } - } -} - -/* Process a port change interrupt */ -static void port_change_irq(struct fsl_udc *udc) -{ - u32 speed; - - /* Bus resetting is finished */ - if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) { - /* Get the speed */ - speed = (fsl_readl(&dr_regs->portsc1) - & PORTSCX_PORT_SPEED_MASK); - switch (speed) { - case PORTSCX_PORT_SPEED_HIGH: - udc->gadget.speed = USB_SPEED_HIGH; - break; - case PORTSCX_PORT_SPEED_FULL: - udc->gadget.speed = USB_SPEED_FULL; - break; - case PORTSCX_PORT_SPEED_LOW: - udc->gadget.speed = USB_SPEED_LOW; - break; - default: - udc->gadget.speed = USB_SPEED_UNKNOWN; - break; - } - } - - /* Update USB state */ - if (!udc->resume_state) - udc->usb_state = USB_STATE_DEFAULT; -} - -/* Process suspend interrupt */ -static void suspend_irq(struct fsl_udc *udc) -{ - udc->resume_state = udc->usb_state; - udc->usb_state = USB_STATE_SUSPENDED; - - /* report suspend to the driver, serial.c does not support this */ - if (udc->driver->suspend) - udc->driver->suspend(&udc->gadget); -} - -static void bus_resume(struct fsl_udc *udc) -{ - udc->usb_state = udc->resume_state; - udc->resume_state = 0; - - /* report resume to the driver, serial.c does not support this */ - if (udc->driver->resume) - udc->driver->resume(&udc->gadget); -} - -/* Clear up all ep queues */ -static int reset_queues(struct fsl_udc *udc) -{ - u8 pipe; - - for (pipe = 0; pipe < udc->max_pipes; pipe++) - udc_reset_ep_queue(udc, pipe); - - /* report disconnect; the driver is already quiesced */ - spin_unlock(&udc->lock); - udc->driver->disconnect(&udc->gadget); - spin_lock(&udc->lock); - - return 0; -} - -/* Process reset interrupt */ -static void reset_irq(struct fsl_udc *udc) -{ - u32 temp; - unsigned long timeout; - - /* Clear the device address */ - temp = fsl_readl(&dr_regs->deviceaddr); - fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr); - - udc->device_address = 0; - - /* Clear usb state */ - udc->resume_state = 0; - udc->ep0_dir = 0; - udc->ep0_state = WAIT_FOR_SETUP; - udc->remote_wakeup = 0; /* default to 0 on reset */ - udc->gadget.b_hnp_enable = 0; - udc->gadget.a_hnp_support = 0; - udc->gadget.a_alt_hnp_support = 0; - - /* Clear all the setup token semaphores */ - temp = fsl_readl(&dr_regs->endptsetupstat); - fsl_writel(temp, &dr_regs->endptsetupstat); - - /* Clear all the endpoint complete status bits */ - temp = fsl_readl(&dr_regs->endptcomplete); - fsl_writel(temp, &dr_regs->endptcomplete); - - timeout = jiffies + 100; - while (fsl_readl(&dr_regs->endpointprime)) { - /* Wait until all endptprime bits cleared */ - if (time_after(jiffies, timeout)) { - ERR("Timeout for reset\n"); - break; - } - cpu_relax(); - } - - /* Write 1s to the flush register */ - fsl_writel(0xffffffff, &dr_regs->endptflush); - - if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) { - VDBG("Bus reset"); - /* Reset all the queues, include XD, dTD, EP queue - * head and TR Queue */ - reset_queues(udc); - udc->usb_state = USB_STATE_DEFAULT; - } else { - VDBG("Controller reset"); - /* initialize usb hw reg except for regs for EP, not - * touch usbintr reg */ - dr_controller_setup(udc); - - /* Reset all internal used Queues */ - reset_queues(udc); - - ep0_setup(udc); - - /* Enable DR IRQ reg, Set Run bit, change udc state */ - dr_controller_run(udc); - udc->usb_state = USB_STATE_ATTACHED; - } -} - -/* - * USB device controller interrupt handler - */ -static irqreturn_t fsl_udc_irq(int irq, void *_udc) -{ - struct fsl_udc *udc = _udc; - u32 irq_src; - irqreturn_t status = IRQ_NONE; - unsigned long flags; - - /* Disable ISR for OTG host mode */ - if (udc->stopped) - return IRQ_NONE; - spin_lock_irqsave(&udc->lock, flags); - irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr); - /* Clear notification bits */ - fsl_writel(irq_src, &dr_regs->usbsts); - - /* VDBG("irq_src [0x%8x]", irq_src); */ - - /* Need to resume? */ - if (udc->usb_state == USB_STATE_SUSPENDED) - if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0) - bus_resume(udc); - - /* USB Interrupt */ - if (irq_src & USB_STS_INT) { - VDBG("Packet int"); - /* Setup package, we only support ep0 as control ep */ - if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) { - tripwire_handler(udc, 0, - (u8 *) (&udc->local_setup_buff)); - setup_received_irq(udc, &udc->local_setup_buff); - status = IRQ_HANDLED; - } - - /* completion of dtd */ - if (fsl_readl(&dr_regs->endptcomplete)) { - dtd_complete_irq(udc); - status = IRQ_HANDLED; - } - } - - /* SOF (for ISO transfer) */ - if (irq_src & USB_STS_SOF) { - status = IRQ_HANDLED; - } - - /* Port Change */ - if (irq_src & USB_STS_PORT_CHANGE) { - port_change_irq(udc); - status = IRQ_HANDLED; - } - - /* Reset Received */ - if (irq_src & USB_STS_RESET) { - reset_irq(udc); - status = IRQ_HANDLED; - } - - /* Sleep Enable (Suspend) */ - if (irq_src & USB_STS_SUSPEND) { - suspend_irq(udc); - status = IRQ_HANDLED; - } - - if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) { - VDBG("Error IRQ %x", irq_src); - } - - spin_unlock_irqrestore(&udc->lock, flags); - return status; -} - -/*----------------------------------------------------------------* - * Hook to gadget drivers - * Called by initialization code of gadget drivers -*----------------------------------------------------------------*/ -int usb_gadget_register_driver(struct usb_gadget_driver *driver) -{ - int retval = -ENODEV; - unsigned long flags = 0; - - if (!udc_controller) - return -ENODEV; - - if (!driver || (driver->speed != USB_SPEED_FULL - && driver->speed != USB_SPEED_HIGH) - || !driver->bind || !driver->disconnect - || !driver->setup) - return -EINVAL; - - if (udc_controller->driver) - return -EBUSY; - - /* lock is needed but whether should use this lock or another */ - spin_lock_irqsave(&udc_controller->lock, flags); - - driver->driver.bus = NULL; - /* hook up the driver */ - udc_controller->driver = driver; - udc_controller->gadget.dev.driver = &driver->driver; - spin_unlock_irqrestore(&udc_controller->lock, flags); - - /* bind udc driver to gadget driver */ - retval = driver->bind(&udc_controller->gadget); - if (retval) { - VDBG("bind to %s --> %d", driver->driver.name, retval); - udc_controller->gadget.dev.driver = NULL; - udc_controller->driver = NULL; - goto out; - } - - /* Enable DR IRQ reg and Set usbcmd reg Run bit */ - dr_controller_run(udc_controller); - udc_controller->usb_state = USB_STATE_ATTACHED; - udc_controller->ep0_state = WAIT_FOR_SETUP; - udc_controller->ep0_dir = 0; - printk(KERN_INFO "%s: bind to driver %s\n", - udc_controller->gadget.name, driver->driver.name); - -out: - if (retval) - printk(KERN_WARNING "gadget driver register failed %d\n", - retval); - return retval; -} -EXPORT_SYMBOL(usb_gadget_register_driver); - -/* Disconnect from gadget driver */ -int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) -{ - struct fsl_ep *loop_ep; - unsigned long flags; - - if (!udc_controller) - return -ENODEV; - - if (!driver || driver != udc_controller->driver || !driver->unbind) - return -EINVAL; - - if (udc_controller->transceiver) - otg_set_peripheral(udc_controller->transceiver, NULL); - - /* stop DR, disable intr */ - dr_controller_stop(udc_controller); - - /* in fact, no needed */ - udc_controller->usb_state = USB_STATE_ATTACHED; - udc_controller->ep0_state = WAIT_FOR_SETUP; - udc_controller->ep0_dir = 0; - - /* stand operation */ - spin_lock_irqsave(&udc_controller->lock, flags); - udc_controller->gadget.speed = USB_SPEED_UNKNOWN; - nuke(&udc_controller->eps[0], -ESHUTDOWN); - list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list, - ep.ep_list) - nuke(loop_ep, -ESHUTDOWN); - spin_unlock_irqrestore(&udc_controller->lock, flags); - - /* report disconnect; the controller is already quiesced */ - driver->disconnect(&udc_controller->gadget); - - /* unbind gadget and unhook driver. */ - driver->unbind(&udc_controller->gadget); - udc_controller->gadget.dev.driver = NULL; - udc_controller->driver = NULL; - - printk(KERN_WARNING "unregistered gadget driver '%s'\n", - driver->driver.name); - return 0; -} -EXPORT_SYMBOL(usb_gadget_unregister_driver); - -/*------------------------------------------------------------------------- - PROC File System Support --------------------------------------------------------------------------*/ -#ifdef CONFIG_USB_GADGET_DEBUG_FILES - -#include - -static const char proc_filename[] = "driver/fsl_usb2_udc"; - -static int fsl_proc_read(char *page, char **start, off_t off, int count, - int *eof, void *_dev) -{ - char *buf = page; - char *next = buf; - unsigned size = count; - unsigned long flags; - int t, i; - u32 tmp_reg; - struct fsl_ep *ep = NULL; - struct fsl_req *req; - - struct fsl_udc *udc = udc_controller; - if (off != 0) - return 0; - - spin_lock_irqsave(&udc->lock, flags); - - /* ------basic driver information ---- */ - t = scnprintf(next, size, - DRIVER_DESC "\n" - "%s version: %s\n" - "Gadget driver: %s\n\n", - driver_name, DRIVER_VERSION, - udc->driver ? udc->driver->driver.name : "(none)"); - size -= t; - next += t; - - /* ------ DR Registers ----- */ - tmp_reg = fsl_readl(&dr_regs->usbcmd); - t = scnprintf(next, size, - "USBCMD reg:\n" - "SetupTW: %d\n" - "Run/Stop: %s\n\n", - (tmp_reg & USB_CMD_SUTW) ? 1 : 0, - (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop"); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->usbsts); - t = scnprintf(next, size, - "USB Status Reg:\n" - "Dr Suspend: %d Reset Received: %d System Error: %s " - "USB Error Interrupt: %s\n\n", - (tmp_reg & USB_STS_SUSPEND) ? 1 : 0, - (tmp_reg & USB_STS_RESET) ? 1 : 0, - (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal", - (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err"); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->usbintr); - t = scnprintf(next, size, - "USB Intrrupt Enable Reg:\n" - "Sleep Enable: %d SOF Received Enable: %d " - "Reset Enable: %d\n" - "System Error Enable: %d " - "Port Change Dectected Enable: %d\n" - "USB Error Intr Enable: %d USB Intr Enable: %d\n\n", - (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0, - (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0, - (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0, - (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0, - (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0, - (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0, - (tmp_reg & USB_INTR_INT_EN) ? 1 : 0); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->frindex); - t = scnprintf(next, size, - "USB Frame Index Reg: Frame Number is 0x%x\n\n", - (tmp_reg & USB_FRINDEX_MASKS)); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->deviceaddr); - t = scnprintf(next, size, - "USB Device Address Reg: Device Addr is 0x%x\n\n", - (tmp_reg & USB_DEVICE_ADDRESS_MASK)); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->endpointlistaddr); - t = scnprintf(next, size, - "USB Endpoint List Address Reg: " - "Device Addr is 0x%x\n\n", - (tmp_reg & USB_EP_LIST_ADDRESS_MASK)); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->portsc1); - t = scnprintf(next, size, - "USB Port Status&Control Reg:\n" - "Port Transceiver Type : %s Port Speed: %s\n" - "PHY Low Power Suspend: %s Port Reset: %s " - "Port Suspend Mode: %s\n" - "Over-current Change: %s " - "Port Enable/Disable Change: %s\n" - "Port Enabled/Disabled: %s " - "Current Connect Status: %s\n\n", ( { - char *s; - switch (tmp_reg & PORTSCX_PTS_FSLS) { - case PORTSCX_PTS_UTMI: - s = "UTMI"; break; - case PORTSCX_PTS_ULPI: - s = "ULPI "; break; - case PORTSCX_PTS_FSLS: - s = "FS/LS Serial"; break; - default: - s = "None"; break; - } - s;} ), ( { - char *s; - switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) { - case PORTSCX_PORT_SPEED_FULL: - s = "Full Speed"; break; - case PORTSCX_PORT_SPEED_LOW: - s = "Low Speed"; break; - case PORTSCX_PORT_SPEED_HIGH: - s = "High Speed"; break; - default: - s = "Undefined"; break; - } - s; - } ), - (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ? - "Normal PHY mode" : "Low power mode", - (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" : - "Not in Reset", - (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in", - (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" : - "No", - (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" : - "Not change", - (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" : - "Not correct", - (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ? - "Attached" : "Not-Att"); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->usbmode); - t = scnprintf(next, size, - "USB Mode Reg: Controller Mode is: %s\n\n", ( { - char *s; - switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) { - case USB_MODE_CTRL_MODE_IDLE: - s = "Idle"; break; - case USB_MODE_CTRL_MODE_DEVICE: - s = "Device Controller"; break; - case USB_MODE_CTRL_MODE_HOST: - s = "Host Controller"; break; - default: - s = "None"; break; - } - s; - } )); - size -= t; - next += t; - - tmp_reg = fsl_readl(&dr_regs->endptsetupstat); - t = scnprintf(next, size, - "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n", - (tmp_reg & EP_SETUP_STATUS_MASK)); - size -= t; - next += t; - - for (i = 0; i < udc->max_ep / 2; i++) { - tmp_reg = fsl_readl(&dr_regs->endptctrl[i]); - t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n", - i, tmp_reg); - size -= t; - next += t; - } - tmp_reg = fsl_readl(&dr_regs->endpointprime); - t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg); - size -= t; - next += t; - - tmp_reg = usb_sys_regs->snoop1; - t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg); - size -= t; - next += t; - - tmp_reg = usb_sys_regs->control; - t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n", - tmp_reg); - size -= t; - next += t; - - /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */ - ep = &udc->eps[0]; - t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n", - ep->ep.name, ep_maxpacket(ep), ep_index(ep)); - 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, &udc->gadget.ep_list, ep.ep_list) { - if (ep->desc) { - t = scnprintf(next, size, - "\nFor %s Maxpkt is 0x%x " - "index is 0x%x\n", - ep->ep.name, ep_maxpacket(ep), - ep_index(ep)); - 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; - } /* end for each_entry of ep req */ - } /* end for else */ - } /* end for if(ep->queue) */ - } /* end (ep->desc) */ - - spin_unlock_irqrestore(&udc->lock, flags); - - *eof = 1; - return count - size; -} - -#define create_proc_file() create_proc_read_entry(proc_filename, \ - 0, NULL, fsl_proc_read, NULL) - -#define remove_proc_file() remove_proc_entry(proc_filename, NULL) - -#else /* !CONFIG_USB_GADGET_DEBUG_FILES */ - -#define create_proc_file() do {} while (0) -#define remove_proc_file() do {} while (0) - -#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ - -/*-------------------------------------------------------------------------*/ - -/* Release udc structures */ -static void fsl_udc_release(struct device *dev) -{ - complete(udc_controller->done); - dma_free_coherent(dev, udc_controller->ep_qh_size, - udc_controller->ep_qh, udc_controller->ep_qh_dma); - kfree(udc_controller); -} - -/****************************************************************** - Internal structure setup functions -*******************************************************************/ -/*------------------------------------------------------------------ - * init resource for globle controller - * Return the udc handle on success or NULL on failure - ------------------------------------------------------------------*/ -static int __init struct_udc_setup(struct fsl_udc *udc, - struct platform_device *pdev) -{ - struct fsl_usb2_platform_data *pdata; - size_t size; - - pdata = pdev->dev.platform_data; - udc->phy_mode = pdata->phy_mode; - - udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL); - if (!udc->eps) { - ERR("malloc fsl_ep failed\n"); - return -1; - } - - /* initialized QHs, take care of alignment */ - size = udc->max_ep * sizeof(struct ep_queue_head); - if (size < QH_ALIGNMENT) - size = QH_ALIGNMENT; - else if ((size % QH_ALIGNMENT) != 0) { - size += QH_ALIGNMENT + 1; - size &= ~(QH_ALIGNMENT - 1); - } - udc->ep_qh = dma_alloc_coherent(&pdev->dev, size, - &udc->ep_qh_dma, GFP_KERNEL); - if (!udc->ep_qh) { - ERR("malloc QHs for udc failed\n"); - kfree(udc->eps); - return -1; - } - - udc->ep_qh_size = size; - - /* Initialize ep0 status request structure */ - /* FIXME: fsl_alloc_request() ignores ep argument */ - udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL), - struct fsl_req, req); - /* allocate a small amount of memory to get valid address */ - udc->status_req->req.buf = kmalloc(8, GFP_KERNEL); - udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf); - - udc->resume_state = USB_STATE_NOTATTACHED; - udc->usb_state = USB_STATE_POWERED; - udc->ep0_dir = 0; - udc->remote_wakeup = 0; /* default to 0 on reset */ - - return 0; -} - -/*---------------------------------------------------------------- - * Setup the fsl_ep struct for eps - * Link fsl_ep->ep to gadget->ep_list - * ep0out is not used so do nothing here - * ep0in should be taken care - *--------------------------------------------------------------*/ -static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index, - char *name, int link) -{ - struct fsl_ep *ep = &udc->eps[index]; - - ep->udc = udc; - strcpy(ep->name, name); - ep->ep.name = ep->name; - - ep->ep.ops = &fsl_ep_ops; - ep->stopped = 0; - - /* for ep0: maxP defined in desc - * for other eps, maxP is set by epautoconfig() called by gadget layer - */ - ep->ep.maxpacket = (unsigned short) ~0; - - /* the queue lists any req for this ep */ - INIT_LIST_HEAD(&ep->queue); - - /* gagdet.ep_list used for ep_autoconfig so no ep0 */ - if (link) - list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); - ep->gadget = &udc->gadget; - ep->qh = &udc->ep_qh[index]; - - return 0; -} - -/* Driver probe function - * all intialization operations implemented here except enabling usb_intr reg - * board setup should have been done in the platform code - */ -static int __init fsl_udc_probe(struct platform_device *pdev) -{ - struct resource *res; - int ret = -ENODEV; - unsigned int i; - u32 dccparams; - - if (strcmp(pdev->name, driver_name)) { - VDBG("Wrong device"); - return -ENODEV; - } - - udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL); - if (udc_controller == NULL) { - ERR("malloc udc failed\n"); - return -ENOMEM; - } - - spin_lock_init(&udc_controller->lock); - udc_controller->stopped = 1; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENXIO; - goto err_kfree; - } - - if (!request_mem_region(res->start, res->end - res->start + 1, - driver_name)) { - ERR("request mem region for %s failed\n", pdev->name); - ret = -EBUSY; - goto err_kfree; - } - - dr_regs = ioremap(res->start, res->end - res->start + 1); - if (!dr_regs) { - ret = -ENOMEM; - goto err_release_mem_region; - } - - usb_sys_regs = (struct usb_sys_interface *) - ((u32)dr_regs + USB_DR_SYS_OFFSET); - - /* Read Device Controller Capability Parameters register */ - dccparams = fsl_readl(&dr_regs->dccparams); - if (!(dccparams & DCCPARAMS_DC)) { - ERR("This SOC doesn't support device role\n"); - ret = -ENODEV; - goto err_iounmap; - } - /* Get max device endpoints */ - /* DEN is bidirectional ep number, max_ep doubles the number */ - udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2; - - udc_controller->irq = platform_get_irq(pdev, 0); - if (!udc_controller->irq) { - ret = -ENODEV; - goto err_iounmap; - } - - ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED, - driver_name, udc_controller); - if (ret != 0) { - ERR("cannot request irq %d err %d\n", - udc_controller->irq, ret); - goto err_iounmap; - } - - /* Initialize the udc structure including QH member and other member */ - if (struct_udc_setup(udc_controller, pdev)) { - ERR("Can't initialize udc data structure\n"); - ret = -ENOMEM; - goto err_free_irq; - } - - /* initialize usb hw reg except for regs for EP, - * leave usbintr reg untouched */ - dr_controller_setup(udc_controller); - - /* Setup gadget structure */ - udc_controller->gadget.ops = &fsl_gadget_ops; - udc_controller->gadget.is_dualspeed = 1; - udc_controller->gadget.ep0 = &udc_controller->eps[0].ep; - INIT_LIST_HEAD(&udc_controller->gadget.ep_list); - udc_controller->gadget.speed = USB_SPEED_UNKNOWN; - udc_controller->gadget.name = driver_name; - - /* Setup gadget.dev and register with kernel */ - dev_set_name(&udc_controller->gadget.dev, "gadget"); - udc_controller->gadget.dev.release = fsl_udc_release; - udc_controller->gadget.dev.parent = &pdev->dev; - ret = device_register(&udc_controller->gadget.dev); - if (ret < 0) - goto err_free_irq; - - /* setup QH and epctrl for ep0 */ - ep0_setup(udc_controller); - - /* setup udc->eps[] for ep0 */ - struct_ep_setup(udc_controller, 0, "ep0", 0); - /* for ep0: the desc defined here; - * for other eps, gadget layer called ep_enable with defined desc - */ - udc_controller->eps[0].desc = &fsl_ep0_desc; - udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD; - - /* setup the udc->eps[] for non-control endpoints and link - * to gadget.ep_list */ - for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) { - char name[14]; - - sprintf(name, "ep%dout", i); - struct_ep_setup(udc_controller, i * 2, name, 1); - sprintf(name, "ep%din", i); - struct_ep_setup(udc_controller, i * 2 + 1, name, 1); - } - - /* use dma_pool for TD management */ - udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev, - sizeof(struct ep_td_struct), - DTD_ALIGNMENT, UDC_DMA_BOUNDARY); - if (udc_controller->td_pool == NULL) { - ret = -ENOMEM; - goto err_unregister; - } - create_proc_file(); - return 0; - -err_unregister: - device_unregister(&udc_controller->gadget.dev); -err_free_irq: - free_irq(udc_controller->irq, udc_controller); -err_iounmap: - iounmap(dr_regs); -err_release_mem_region: - release_mem_region(res->start, res->end - res->start + 1); -err_kfree: - kfree(udc_controller); - udc_controller = NULL; - return ret; -} - -/* Driver removal function - * Free resources and finish pending transactions - */ -static int __exit fsl_udc_remove(struct platform_device *pdev) -{ - struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - DECLARE_COMPLETION(done); - - if (!udc_controller) - return -ENODEV; - udc_controller->done = &done; - - /* DR has been stopped in usb_gadget_unregister_driver() */ - remove_proc_file(); - - /* Free allocated memory */ - kfree(udc_controller->status_req->req.buf); - kfree(udc_controller->status_req); - kfree(udc_controller->eps); - - dma_pool_destroy(udc_controller->td_pool); - free_irq(udc_controller->irq, udc_controller); - iounmap(dr_regs); - release_mem_region(res->start, res->end - res->start + 1); - - device_unregister(&udc_controller->gadget.dev); - /* free udc --wait for the release() finished */ - wait_for_completion(&done); - - return 0; -} - -/*----------------------------------------------------------------- - * Modify Power management attributes - * Used by OTG statemachine to disable gadget temporarily - -----------------------------------------------------------------*/ -static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state) -{ - dr_controller_stop(udc_controller); - return 0; -} - -/*----------------------------------------------------------------- - * Invoked on USB resume. May be called in_interrupt. - * Here we start the DR controller and enable the irq - *-----------------------------------------------------------------*/ -static int fsl_udc_resume(struct platform_device *pdev) -{ - /* Enable DR irq reg and set controller Run */ - if (udc_controller->stopped) { - dr_controller_setup(udc_controller); - dr_controller_run(udc_controller); - } - udc_controller->usb_state = USB_STATE_ATTACHED; - udc_controller->ep0_state = WAIT_FOR_SETUP; - udc_controller->ep0_dir = 0; - return 0; -} - -/*------------------------------------------------------------------------- - Register entry point for the peripheral controller driver ---------------------------------------------------------------------------*/ - -static struct platform_driver udc_driver = { - .remove = __exit_p(fsl_udc_remove), - /* these suspend and resume are not usb suspend and resume */ - .suspend = fsl_udc_suspend, - .resume = fsl_udc_resume, - .driver = { - .name = (char *)driver_name, - .owner = THIS_MODULE, - }, -}; - -static int __init udc_init(void) -{ - printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION); - return platform_driver_probe(&udc_driver, fsl_udc_probe); -} - -module_init(udc_init); - -static void __exit udc_exit(void) -{ - platform_driver_unregister(&udc_driver); - printk(KERN_WARNING "%s unregistered\n", driver_desc); -} - -module_exit(udc_exit); - -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:fsl-usb2-udc"); -- cgit v1.2.3