--- /dev/null
+/*
+ * drivers/usb/gadget/emxx_udc.c
+ * EMXX FCD (Function Controller Driver) for USB.
+ *
+ * Copyright (C) 2010 Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/clk.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/dma-mapping.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include "emxx_udc.h"
+
+#define DRIVER_DESC "EMXX UDC driver"
+#define DMA_ADDR_INVALID (~(dma_addr_t)0)
+
+static const char driver_name[] = "emxx_udc";
+static const char driver_desc[] = DRIVER_DESC;
+
+/*===========================================================================*/
+/* Prototype */
+static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *, struct nbu2ss_ep *);
+static void _nbu2ss_ep0_enable(struct nbu2ss_udc *);
+/*static void _nbu2ss_ep0_disable(struct nbu2ss_udc *);*/
+static void _nbu2ss_ep_done(struct nbu2ss_ep *, struct nbu2ss_req *, int);
+static void _nbu2ss_set_test_mode(struct nbu2ss_udc *, u32 mode);
+static void _nbu2ss_endpoint_toggle_reset(struct nbu2ss_udc *udc, u8 ep_adrs);
+
+static int _nbu2ss_pullup(struct nbu2ss_udc *, int);
+static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *);
+
+/*===========================================================================*/
+/* Macro */
+#define _nbu2ss_zero_len_pkt(udc, epnum) \
+ _nbu2ss_ep_in_end(udc, epnum, 0, 0)
+
+
+/*===========================================================================*/
+/* Global */
+struct nbu2ss_udc udc_controller;
+
+
+/*-------------------------------------------------------------------------*/
+/* Read */
+static inline u32 _nbu2ss_readl(void *address)
+{
+ return __raw_readl(address);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Write */
+static inline void _nbu2ss_writel(void *address, u32 udata)
+{
+ __raw_writel(udata, address);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Set Bit */
+static inline void _nbu2ss_bitset(void *address, u32 udata)
+{
+ u32 reg_dt = __raw_readl(address) | (udata);
+
+ __raw_writel(reg_dt, address);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Clear Bit */
+static inline void _nbu2ss_bitclr(void *address, u32 udata)
+{
+ u32 reg_dt = __raw_readl(address) & ~(udata);
+
+ __raw_writel(reg_dt, address);
+}
+
+#ifdef UDC_DEBUG_DUMP
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_dump_register(struct nbu2ss_udc *udc)
+{
+ int i;
+ u32 reg_data;
+
+ pr_info("=== %s()\n", __func__);
+
+ if (udc == NULL) {
+ pr_err("%s udc == NULL\n", __func__);
+ return;
+ }
+
+ spin_unlock(&udc->lock);
+
+ dev_dbg(&udc->dev, "\n-USB REG-\n");
+ for (i = 0x0 ; i < USB_BASE_SIZE ; i += 16) {
+ reg_data = _nbu2ss_readl(
+ (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i));
+ dev_dbg(&udc->dev, "USB%04x =%08x", i, (int)reg_data);
+
+ reg_data = _nbu2ss_readl(
+ (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 4));
+ dev_dbg(&udc->dev, " %08x", (int)reg_data);
+
+ reg_data = _nbu2ss_readl(
+ (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 8));
+ dev_dbg(&udc->dev, " %08x", (int)reg_data);
+
+ reg_data = _nbu2ss_readl(
+ (u32 *)IO_ADDRESS(USB_BASE_ADDRESS + i + 12));
+ dev_dbg(&udc->dev, " %08x\n", (int)reg_data);
+
+ }
+
+ spin_lock(&udc->lock);
+}
+#endif /* UDC_DEBUG_DUMP */
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint 0 Callback (Complete) */
+static void _nbu2ss_ep0_complete(struct usb_ep *_ep, struct usb_request *_req)
+{
+ u8 recipient;
+ u16 selector;
+ u32 test_mode;
+ struct usb_ctrlrequest *p_ctrl;
+ struct nbu2ss_udc *udc;
+
+ if ((_ep == NULL) || (_req == NULL))
+ return;
+
+ udc = (struct nbu2ss_udc *)_req->context;
+ p_ctrl = &udc->ctrl;
+ if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+
+ if (p_ctrl->bRequest == USB_REQ_SET_FEATURE) {
+ /*-------------------------------------------------*/
+ /* SET_FEATURE */
+ recipient = (u8)(p_ctrl->bRequestType & USB_RECIP_MASK);
+ selector = p_ctrl->wValue;
+ if ((recipient == USB_RECIP_DEVICE) &&
+ (selector == USB_DEVICE_TEST_MODE)) {
+ test_mode = (u32)(p_ctrl->wIndex >> 8);
+ _nbu2ss_set_test_mode(udc, test_mode);
+ }
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+/* Initialization usb_request */
+static void _nbu2ss_create_ep0_packet(
+ struct nbu2ss_udc *udc,
+ void *p_buf,
+ unsigned length
+)
+{
+ udc->ep0_req.req.buf = p_buf;
+ udc->ep0_req.req.length = length;
+ udc->ep0_req.req.dma = 0;
+ udc->ep0_req.req.zero = TRUE;
+ udc->ep0_req.req.complete = _nbu2ss_ep0_complete;
+ udc->ep0_req.req.status = -EINPROGRESS;
+ udc->ep0_req.req.context = udc;
+ udc->ep0_req.req.actual = 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Acquisition of the first address of RAM(FIFO) */
+static u32 _nbu2ss_get_begin_ram_address(struct nbu2ss_udc *udc)
+{
+ u32 num, buf_type;
+ u32 data, last_ram_adr, use_ram_size;
+
+ struct ep_regs *p_ep_regs;
+
+ last_ram_adr = (D_RAM_SIZE_CTRL / sizeof(u32)) * 2;
+ use_ram_size = 0;
+
+ for (num = 0; num < NUM_ENDPOINTS - 1; num++) {
+ p_ep_regs = &udc->p_regs->EP_REGS[num];
+ data = _nbu2ss_readl(&p_ep_regs->EP_PCKT_ADRS);
+ buf_type = _nbu2ss_readl(&p_ep_regs->EP_CONTROL) & EPn_BUF_TYPE;
+ if (buf_type == 0) {
+ /* Single Buffer */
+ use_ram_size += (data & EPn_MPKT) / sizeof(u32);
+ } else {
+ /* Double Buffer */
+ use_ram_size += ((data & EPn_MPKT) / sizeof(u32)) * 2;
+ }
+
+ if ((data >> 16) > last_ram_adr)
+ last_ram_adr = data>>16;
+ }
+
+ return last_ram_adr + use_ram_size;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Construction of Endpoint */
+static int _nbu2ss_ep_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ u32 num;
+ u32 data;
+ u32 begin_adrs;
+
+ if (ep->epnum == 0)
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ /*-------------------------------------------------------------*/
+ /* RAM Transfer Address */
+ begin_adrs = _nbu2ss_get_begin_ram_address(udc);
+ data = (begin_adrs << 16) | ep->ep.maxpacket;
+ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, data);
+
+ /*-------------------------------------------------------------*/
+ /* Interrupt Enable */
+ data = 1 << (ep->epnum + 8);
+ _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, data);
+
+ /*-------------------------------------------------------------*/
+ /* Endpoint Type(Mode) */
+ /* Bulk, Interrupt, ISO */
+ switch (ep->ep_type) {
+ case USB_ENDPOINT_XFER_BULK:
+ data = EPn_BULK;
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ data = EPn_BUF_SINGLE | EPn_INTERRUPT;
+ break;
+
+ case USB_ENDPOINT_XFER_ISOC:
+ data = EPn_ISO;
+ break;
+
+ default:
+ data = 0;
+ break;
+ }
+
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+ _nbu2ss_endpoint_toggle_reset(udc, (ep->epnum|ep->direct));
+
+ if (ep->direct == USB_DIR_OUT) {
+ /*---------------------------------------------------------*/
+ /* OUT */
+ data = EPn_EN | EPn_BCLR | EPn_DIR0;
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = (EPn_ONAK | EPn_OSTL_EN | EPn_OSTL);
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = (EPn_OUT_EN | EPn_OUT_END_EN);
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
+ } else {
+ /*---------------------------------------------------------*/
+ /* IN */
+ data = (EPn_EN | EPn_BCLR | EPn_AUTO);
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = (EPn_ISTL);
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = (EPn_IN_EN | EPn_IN_END_EN);
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Release of Endpoint */
+static int _nbu2ss_epn_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ u32 num;
+ u32 data;
+
+ if ((ep->epnum == 0) || (udc->vbus_active == 0))
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ /*-------------------------------------------------------------*/
+ /* RAM Transfer Address */
+ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, 0);
+
+ /*-------------------------------------------------------------*/
+ /* Interrupt Disable */
+ data = 1 << (ep->epnum + 8);
+ _nbu2ss_bitclr(&udc->p_regs->USB_INT_ENA, data);
+
+ if (ep->direct == USB_DIR_OUT) {
+ /*---------------------------------------------------------*/
+ /* OUT */
+ data = EPn_ONAK | EPn_BCLR;
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = EPn_EN | EPn_DIR0;
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = EPn_OUT_EN | EPn_OUT_END_EN;
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
+ } else {
+ /*---------------------------------------------------------*/
+ /* IN */
+ data = EPn_BCLR;
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = EPn_EN | EPn_AUTO;
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+
+ data = EPn_IN_EN | EPn_IN_END_EN;
+ _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data);
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* DMA setting (without Endpoint 0) */
+static void _nbu2ss_ep_dma_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ u32 num;
+ u32 data;
+
+ data = _nbu2ss_readl(&udc->p_regs->USBSSCONF);
+ if (((ep->epnum == 0) || (data & (1 << ep->epnum)) == 0))
+ return; /* Not Support DMA */
+
+ num = ep->epnum - 1;
+
+ if (ep->direct == USB_DIR_OUT) {
+ /*---------------------------------------------------------*/
+ /* OUT */
+ data = ep->ep.maxpacket;
+ _nbu2ss_writel(&udc->p_regs->EP_DCR[num].EP_DCR2, data);
+
+ /*---------------------------------------------------------*/
+ /* Transfer Direct */
+ data = DCR1_EPn_DIR0;
+ _nbu2ss_bitset(&udc->p_regs->EP_DCR[num].EP_DCR1, data);
+
+ /*---------------------------------------------------------*/
+ /* DMA Mode etc. */
+ data = EPn_STOP_MODE | EPn_STOP_SET | EPn_DMAMODE0;
+ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data);
+ } else {
+ /*---------------------------------------------------------*/
+ /* IN */
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, EPn_AUTO);
+
+ /*---------------------------------------------------------*/
+ /* DMA Mode etc. */
+ data = EPn_BURST_SET | EPn_DMAMODE0;
+ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+/* DMA setting release */
+static void _nbu2ss_ep_dma_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ u32 num;
+ u32 data;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (udc->vbus_active == 0)
+ return; /* VBUS OFF */
+
+ data = _nbu2ss_readl(&preg->USBSSCONF);
+ if ((ep->epnum == 0) || ((data & (1 << ep->epnum)) == 0))
+ return; /* Not Support DMA */
+
+ num = ep->epnum - 1;
+
+ _nbu2ss_ep_dma_abort(udc, ep);
+
+ if (ep->direct == USB_DIR_OUT) {
+ /*---------------------------------------------------------*/
+ /* OUT */
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, 0);
+ _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPn_DIR0);
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0);
+ } else {
+ /*---------------------------------------------------------*/
+ /* IN */
+ _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+/* Abort DMA */
+static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ struct fc_regs *preg = udc->p_regs;
+
+ _nbu2ss_bitclr(&preg->EP_DCR[ep->epnum-1].EP_DCR1, DCR1_EPn_REQEN);
+ mdelay(DMA_DISABLE_TIME); /* DCR1_EPn_REQEN Clear */
+ _nbu2ss_bitclr(&preg->EP_REGS[ep->epnum-1].EP_DMA_CTRL, EPn_DMA_EN);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Start IN Transfer */
+static void _nbu2ss_ep_in_end(
+ struct nbu2ss_udc *udc,
+ u32 epnum,
+ u32 data32,
+ u32 length
+)
+{
+ u32 data;
+ u32 num;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (length >= sizeof(u32))
+ return;
+
+ if (epnum == 0) {
+ _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_AUTO);
+
+ /* Writing of 1-4 bytes */
+ if (length)
+ _nbu2ss_writel(&preg->EP0_WRITE, data32);
+
+ data = ((length << 5) & EP0_DW) | EP0_DEND;
+ _nbu2ss_writel(&preg->EP0_CONTROL, data);
+
+ _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_AUTO);
+ } else {
+ num = epnum - 1;
+
+ _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
+
+ /* Writing of 1-4 bytes */
+ if (length)
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_WRITE, data32);
+
+ data = (((((u32)length) << 5) & EPn_DW) | EPn_DEND);
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data);
+
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, EPn_AUTO);
+ }
+}
+
+#ifdef USE_DMA
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_dma_map_single(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u8 direct
+)
+{
+ if (req->req.dma == DMA_ADDR_INVALID) {
+ if (req->unaligned)
+ req->req.dma = ep->phys_buf;
+ else {
+ req->req.dma = dma_map_single(
+ udc->gadget.dev.parent,
+ req->req.buf,
+ req->req.length,
+ (direct == USB_DIR_IN)
+ ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ }
+ req->mapped = 1;
+ } else {
+ if (!req->unaligned)
+ dma_sync_single_for_device(
+ udc->gadget.dev.parent,
+ req->req.dma,
+ req->req.length,
+ (direct == USB_DIR_IN)
+ ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+
+ req->mapped = 0;
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_dma_unmap_single(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u8 direct
+)
+{
+ u8 data[4];
+ u8 *p;
+ u32 count = 0;
+
+ if (direct == USB_DIR_OUT) {
+ count = req->req.actual % 4;
+ if (count) {
+ p = req->req.buf;
+ p += (req->req.actual - count);
+ memcpy(data, p, count);
+ }
+ }
+
+ if (req->mapped) {
+ if (req->unaligned) {
+ if (direct == USB_DIR_OUT)
+ memcpy(req->req.buf, ep->virt_buf,
+ req->req.actual & 0xfffffffc);
+ } else
+ dma_unmap_single(udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ (direct == USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ req->req.dma = DMA_ADDR_INVALID;
+ req->mapped = 0;
+ } else {
+ if (!req->unaligned)
+ dma_sync_single_for_cpu(udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ (direct == USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ }
+
+ if (count) {
+ p = req->req.buf;
+ p += (req->req.actual - count);
+ memcpy(p, data, count);
+ }
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint 0 OUT Transfer (PIO) */
+static int EP0_out_PIO(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
+{
+ u32 i;
+ int nret = 0;
+ u32 iWordLength = 0;
+ union usb_reg_access *pBuf32 = (union usb_reg_access *)pBuf;
+
+ /*------------------------------------------------------------*/
+ /* Read Length */
+ iWordLength = length / sizeof(u32);
+
+ /*------------------------------------------------------------*/
+ /* PIO Read */
+ if (iWordLength) {
+ for (i = 0; i < iWordLength; i++) {
+ pBuf32->dw = _nbu2ss_readl(&udc->p_regs->EP0_READ);
+ pBuf32++;
+ }
+ nret = iWordLength * sizeof(u32);
+ }
+
+ return nret;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint 0 OUT Transfer (PIO, OverBytes) */
+static int EP0_out_OverBytes(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
+{
+ u32 i;
+ u32 iReadSize = 0;
+ union usb_reg_access Temp32;
+ union usb_reg_access *pBuf32 = (union usb_reg_access *)pBuf;
+
+ if ((0 < length) && (length < sizeof(u32))) {
+ Temp32.dw = _nbu2ss_readl(&udc->p_regs->EP0_READ);
+ for (i = 0 ; i < length ; i++)
+ pBuf32->byte.DATA[i] = Temp32.byte.DATA[i];
+ iReadSize += length;
+ }
+
+ return iReadSize;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint 0 IN Transfer (PIO) */
+static int EP0_in_PIO(struct nbu2ss_udc *udc, u8 *pBuf, u32 length)
+{
+ u32 i;
+ u32 iMaxLength = EP0_PACKETSIZE;
+ u32 iWordLength = 0;
+ u32 iWriteLength = 0;
+ union usb_reg_access *pBuf32 = (union usb_reg_access *)pBuf;
+
+ /*------------------------------------------------------------*/
+ /* Transfer Length */
+ if (iMaxLength < length)
+ iWordLength = iMaxLength / sizeof(u32);
+ else
+ iWordLength = length / sizeof(u32);
+
+ /*------------------------------------------------------------*/
+ /* PIO */
+ for (i = 0; i < iWordLength; i++) {
+ _nbu2ss_writel(&udc->p_regs->EP0_WRITE, pBuf32->dw);
+ pBuf32++;
+ iWriteLength += sizeof(u32);
+ }
+
+ return iWriteLength;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint 0 IN Transfer (PIO, OverBytes) */
+static int EP0_in_OverBytes(struct nbu2ss_udc *udc, u8 *pBuf, u32 iRemainSize)
+{
+ u32 i;
+ union usb_reg_access Temp32;
+ union usb_reg_access *pBuf32 = (union usb_reg_access *)pBuf;
+
+ if ((0 < iRemainSize) && (iRemainSize < sizeof(u32))) {
+ for (i = 0 ; i < iRemainSize ; i++)
+ Temp32.byte.DATA[i] = pBuf32->byte.DATA[i];
+ _nbu2ss_ep_in_end(udc, 0, Temp32.dw, iRemainSize);
+
+ return iRemainSize;
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Transfer NULL Packet (Epndoint 0) */
+static int EP0_send_NULL(struct nbu2ss_udc *udc, bool pid_flag)
+{
+ u32 data;
+
+ data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
+ data &= ~(u32)EP0_INAK;
+
+ if (pid_flag)
+ data |= (EP0_INAK_EN | EP0_PIDCLR | EP0_DEND);
+ else
+ data |= (EP0_INAK_EN | EP0_DEND);
+
+ _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Receive NULL Packet (Endpoint 0) */
+static int EP0_receive_NULL(struct nbu2ss_udc *udc, bool pid_flag)
+{
+ u32 data;
+
+ data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
+ data &= ~(u32)EP0_ONAK;
+
+ if (pid_flag)
+ data |= EP0_PIDCLR;
+
+ _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_ep0_in_transfer(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req
+)
+{
+ u8 *pBuffer; /* IN Data Buffer */
+ u32 data;
+ u32 iRemainSize = 0;
+ int result = 0;
+
+ /*-------------------------------------------------------------*/
+ /* End confirmation */
+ if (req->req.actual == req->req.length) {
+ if ((req->req.actual % EP0_PACKETSIZE) == 0) {
+ if (req->zero) {
+ req->zero = false;
+ EP0_send_NULL(udc, FALSE);
+ return 1;
+ }
+ }
+
+ return 0; /* Transfer End */
+ }
+
+ /*-------------------------------------------------------------*/
+ /* NAK release */
+ data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
+ data |= EP0_INAK_EN;
+ data &= ~(u32)EP0_INAK;
+ _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data);
+
+ iRemainSize = req->req.length - req->req.actual;
+ pBuffer = (u8 *)req->req.buf;
+ pBuffer += req->req.actual;
+
+ /*-------------------------------------------------------------*/
+ /* Data transfer */
+ result = EP0_in_PIO(udc, pBuffer, iRemainSize);
+
+ req->div_len = result;
+ iRemainSize -= result;
+
+ if (iRemainSize == 0) {
+ EP0_send_NULL(udc, FALSE);
+ return result;
+ }
+
+ if ((iRemainSize < sizeof(u32)) && (result != EP0_PACKETSIZE)) {
+ pBuffer += result;
+ result += EP0_in_OverBytes(udc, pBuffer, iRemainSize);
+ req->div_len = result;
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_ep0_out_transfer(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req
+)
+{
+ u8 *pBuffer;
+ u32 iRemainSize;
+ u32 iRecvLength;
+ int result = 0;
+ int fRcvZero;
+
+ /*-------------------------------------------------------------*/
+ /* Receive data confirmation */
+ iRecvLength = _nbu2ss_readl(&udc->p_regs->EP0_LENGTH) & EP0_LDATA;
+ if (iRecvLength != 0) {
+
+ fRcvZero = 0;
+
+ iRemainSize = req->req.length - req->req.actual;
+ pBuffer = (u8 *)req->req.buf;
+ pBuffer += req->req.actual;
+
+ result = EP0_out_PIO(udc, pBuffer
+ , min(iRemainSize, iRecvLength));
+ if (result < 0)
+ return result;
+
+ req->req.actual += result;
+ iRecvLength -= result;
+
+ if ((0 < iRecvLength) && (iRecvLength < sizeof(u32))) {
+ pBuffer += result;
+ iRemainSize -= result;
+
+ result = EP0_out_OverBytes(udc, pBuffer
+ , min(iRemainSize, iRecvLength));
+ req->req.actual += result;
+ }
+ } else {
+ fRcvZero = 1;
+ }
+
+ /*-------------------------------------------------------------*/
+ /* End confirmation */
+ if (req->req.actual == req->req.length) {
+ if ((req->req.actual % EP0_PACKETSIZE) == 0) {
+ if (req->zero) {
+ req->zero = false;
+ EP0_receive_NULL(udc, FALSE);
+ return 1;
+ }
+ }
+
+ return 0; /* Transfer End */
+ }
+
+ if ((req->req.actual % EP0_PACKETSIZE) != 0)
+ return 0; /* Short Packet Transfer End */
+
+ if (req->req.actual > req->req.length) {
+ dev_err(udc->dev, " *** Overrun Error\n");
+ return -EOVERFLOW;
+ }
+
+ if (fRcvZero != 0) {
+ iRemainSize = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL);
+ if (iRemainSize & EP0_ONAK) {
+ /*---------------------------------------------------*/
+ /* NACK release */
+ _nbu2ss_bitclr(&udc->p_regs->EP0_CONTROL, EP0_ONAK);
+ }
+ result = 1;
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_out_dma(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_req *req,
+ u32 num,
+ u32 length
+)
+{
+ u8 *pBuffer;
+ u32 mpkt;
+ u32 lmpkt;
+ u32 dmacnt;
+ u32 burst = 1;
+ u32 data;
+ int result = -EINVAL;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (req->dma_flag)
+ return 1; /* DMA is forwarded */
+
+ req->dma_flag = TRUE;
+ pBuffer = (u8 *)req->req.dma;
+ pBuffer += req->req.actual;
+
+ /* DMA Address */
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)pBuffer);
+
+ /* Number of transfer packets */
+ mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPn_MPKT;
+ dmacnt = (length / mpkt);
+ lmpkt = (length % mpkt) & ~(u32)0x03;
+
+ if (DMA_MAX_COUNT < dmacnt) {
+ dmacnt = DMA_MAX_COUNT;
+ lmpkt = 0;
+ } else if (0 != lmpkt) {
+ if (0 == dmacnt)
+ burst = 0; /* Burst OFF */
+ dmacnt++;
+ }
+
+ data = mpkt | (lmpkt << 16);
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data);
+
+ data = ((dmacnt & 0xff) << 16) | DCR1_EPn_DIR0 | DCR1_EPn_REQEN;
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data);
+
+ if (0 == burst) {
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, 0);
+ _nbu2ss_bitclr(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_BURST_SET);
+ } else {
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT
+ , (dmacnt << 16));
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_BURST_SET);
+ }
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_DMA_EN);
+
+ result = length & ~(u32)0x03;
+ req->div_len = result;
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_out_pio(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u32 length
+)
+{
+ u8 *pBuffer;
+ u32 i;
+ u32 data;
+ u32 iWordLength;
+ union usb_reg_access Temp32;
+ union usb_reg_access *pBuf32;
+ int result = 0;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (req->dma_flag)
+ return 1; /* DMA is forwarded */
+
+ if (length == 0)
+ return 0;
+
+ pBuffer = (u8 *)req->req.buf;
+ pBuf32 = (union usb_reg_access *)(pBuffer + req->req.actual);
+
+ iWordLength = length / sizeof(u32);
+ if (iWordLength > 0) {
+ /*---------------------------------------------------------*/
+ /* Copy of every four bytes */
+ for (i = 0; i < iWordLength; i++) {
+ pBuf32->dw =
+ _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_READ);
+ pBuf32++;
+ }
+ result = iWordLength * sizeof(u32);
+ }
+
+ data = length - result;
+ if (data > 0) {
+ /*---------------------------------------------------------*/
+ /* Copy of fraction byte */
+ Temp32.dw = _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_READ);
+ for (i = 0 ; i < data ; i++)
+ pBuf32->byte.DATA[i] = Temp32.byte.DATA[i];
+ result += data;
+ }
+
+ req->req.actual += result;
+
+ if ((req->req.actual == req->req.length)
+ || ((req->req.actual % ep->ep.maxpacket) != 0)) {
+
+ result = 0;
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_out_data(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u32 data_size
+)
+{
+ u32 num;
+ u32 iBufSize;
+ int nret = 1;
+
+ if (ep->epnum == 0)
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ iBufSize = min((req->req.length - req->req.actual), data_size);
+
+ if ((ep->ep_type != USB_ENDPOINT_XFER_INT)
+ && (req->req.dma != 0)
+ && (iBufSize >= sizeof(u32))) {
+ nret = _nbu2ss_out_dma(udc, req, num, iBufSize);
+ } else {
+ iBufSize = min_t(u32, iBufSize, ep->ep.maxpacket);
+ nret = _nbu2ss_epn_out_pio(udc, ep, req, iBufSize);
+ }
+
+ return nret;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_out_transfer(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req
+)
+{
+ u32 num;
+ u32 iRecvLength;
+ int result = 1;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (ep->epnum == 0)
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ /*-------------------------------------------------------------*/
+ /* Receive Length */
+ iRecvLength
+ = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT) & EPn_LDATA;
+
+ if (iRecvLength != 0) {
+ result = _nbu2ss_epn_out_data(udc, ep, req, iRecvLength);
+ if (iRecvLength < ep->ep.maxpacket) {
+ if (iRecvLength == result) {
+ req->req.actual += result;
+ result = 0;
+ }
+ }
+ } else {
+ if ((req->req.actual == req->req.length)
+ || ((req->req.actual % ep->ep.maxpacket) != 0)) {
+
+ result = 0;
+ }
+ }
+
+ if (result == 0) {
+ if ((req->req.actual % ep->ep.maxpacket) == 0) {
+ if (req->zero) {
+ req->zero = false;
+ return 1;
+ }
+ }
+ }
+
+ if (req->req.actual > req->req.length) {
+ dev_err(udc->dev, " Overrun Error\n");
+ dev_err(udc->dev, " actual = %d, length = %d\n",
+ req->req.actual, req->req.length);
+ result = -EOVERFLOW;
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_in_dma(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u32 num,
+ u32 length
+)
+{
+ u8 *pBuffer;
+ u32 mpkt; /* MaxPacketSize */
+ u32 lmpkt; /* Last Packet Data Size */
+ u32 dmacnt; /* IN Data Size */
+ u32 iWriteLength;
+ u32 data;
+ int result = -EINVAL;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (req->dma_flag)
+ return 1; /* DMA is forwarded */
+
+#ifdef USE_DMA
+ if (req->req.actual == 0)
+ _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_IN);
+#endif
+ req->dma_flag = TRUE;
+
+ /* MAX Packet Size */
+ mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPn_MPKT;
+
+ if ((DMA_MAX_COUNT * mpkt) < length)
+ iWriteLength = DMA_MAX_COUNT * mpkt;
+ else
+ iWriteLength = length;
+
+ /*------------------------------------------------------------*/
+ /* Number of transmission packets */
+ if (mpkt < iWriteLength) {
+ dmacnt = iWriteLength / mpkt;
+ lmpkt = (iWriteLength % mpkt) & ~(u32)0x3;
+ if (lmpkt != 0)
+ dmacnt++;
+ else
+ lmpkt = mpkt & ~(u32)0x3;
+
+ } else {
+ dmacnt = 1;
+ lmpkt = iWriteLength & ~(u32)0x3;
+ }
+
+ /* Packet setting */
+ data = mpkt | (lmpkt << 16);
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data);
+
+ /* Address setting */
+ pBuffer = (u8 *)req->req.dma;
+ pBuffer += req->req.actual;
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)pBuffer);
+
+ /* Packet and DMA setting */
+ data = ((dmacnt & 0xff) << 16) | DCR1_EPn_REQEN;
+ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data);
+
+ /* Packet setting of EPC */
+ data = dmacnt << 16;
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, data);
+
+ /*DMA setting of EPC */
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPn_DMA_EN);
+
+ result = iWriteLength & ~(u32)0x3;
+ req->div_len = result;
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_in_pio(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u32 length
+)
+{
+ u8 *pBuffer;
+ u32 i;
+ u32 data;
+ u32 iWordLength;
+ union usb_reg_access Temp32;
+ union usb_reg_access *pBuf32 = NULL;
+ int result = 0;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (req->dma_flag)
+ return 1; /* DMA is forwarded */
+
+ if (length > 0) {
+ pBuffer = (u8 *)req->req.buf;
+ pBuf32 = (union usb_reg_access *)(pBuffer + req->req.actual);
+
+ iWordLength = length / sizeof(u32);
+ if (iWordLength > 0) {
+ for (i = 0; i < iWordLength; i++) {
+ _nbu2ss_writel(
+ &preg->EP_REGS[ep->epnum-1].EP_WRITE
+ , pBuf32->dw
+ );
+
+ pBuf32++;
+ }
+ result = iWordLength * sizeof(u32);
+ }
+ }
+
+ if (result != ep->ep.maxpacket) {
+ data = length - result;
+ Temp32.dw = 0;
+ for (i = 0 ; i < data ; i++)
+ Temp32.byte.DATA[i] = pBuf32->byte.DATA[i];
+
+ _nbu2ss_ep_in_end(udc, ep->epnum, Temp32.dw, data);
+ result += data;
+ }
+
+ req->div_len = result;
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_in_data(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ u32 data_size
+)
+{
+ u32 num;
+ int nret = 1;
+
+ if (ep->epnum == 0)
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ if ((ep->ep_type != USB_ENDPOINT_XFER_INT)
+ && (req->req.dma != 0)
+ && (data_size >= sizeof(u32))) {
+ nret = _nbu2ss_in_dma(udc, ep, req, num, data_size);
+ } else {
+ data_size = min_t(u32, data_size, ep->ep.maxpacket);
+ nret = _nbu2ss_epn_in_pio(udc, ep, req, data_size);
+ }
+
+ return nret;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_epn_in_transfer(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req
+)
+{
+ u32 num;
+ u32 iBufSize;
+ int result = 0;
+ u32 status;
+
+ if (ep->epnum == 0)
+ return -EINVAL;
+
+ num = ep->epnum - 1;
+
+ status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS);
+
+ /*-------------------------------------------------------------*/
+ /* State confirmation of FIFO */
+ if (req->req.actual == 0) {
+ if ((status & EPn_IN_EMPTY) == 0)
+ return 1; /* Not Empty */
+
+ } else {
+ if ((status & EPn_IN_FULL) != 0)
+ return 1; /* Not Empty */
+ }
+
+ /*-------------------------------------------------------------*/
+ /* Start tranfer */
+ iBufSize = req->req.length - req->req.actual;
+ if (iBufSize > 0)
+ result = _nbu2ss_epn_in_data(udc, ep, req, iBufSize);
+ else if (req->req.length == 0)
+ _nbu2ss_zero_len_pkt(udc, ep->epnum);
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_start_transfer(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ bool bflag)
+{
+ int nret = -EINVAL;
+
+ req->dma_flag = FALSE;
+ req->div_len = 0;
+
+ if (req->req.length == 0)
+ req->zero = false;
+ else {
+ if ((req->req.length % ep->ep.maxpacket) == 0)
+ req->zero = req->req.zero;
+ else
+ req->zero = false;
+ }
+
+ if (ep->epnum == 0) {
+ /* EP0 */
+ switch (udc->ep0state) {
+ case EP0_IN_DATA_PHASE:
+ nret = _nbu2ss_ep0_in_transfer(udc, ep, req);
+ break;
+
+ case EP0_OUT_DATA_PHASE:
+ nret = _nbu2ss_ep0_out_transfer(udc, ep, req);
+ break;
+
+ case EP0_IN_STATUS_PHASE:
+ nret = EP0_send_NULL(udc, TRUE);
+ break;
+
+ default:
+ break;
+ }
+
+ } else {
+ /* EPn */
+ if (ep->direct == USB_DIR_OUT) {
+ /* OUT */
+ if (bflag == FALSE)
+ nret = _nbu2ss_epn_out_transfer(udc, ep, req);
+ } else {
+ /* IN */
+ nret = _nbu2ss_epn_in_transfer(udc, ep, req);
+ }
+ }
+
+ return nret;
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_restert_transfer(struct nbu2ss_ep *ep)
+{
+ u32 length;
+ bool bflag = FALSE;
+ struct nbu2ss_req *req;
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
+
+ if (req == NULL)
+ return;
+
+ if (ep->epnum > 0) {
+ length = _nbu2ss_readl(
+ &ep->udc->p_regs->EP_REGS[ep->epnum-1].EP_LEN_DCNT);
+
+ length &= EPn_LDATA;
+ if (length < ep->ep.maxpacket)
+ bflag = TRUE;
+ }
+
+ _nbu2ss_start_transfer(ep->udc, ep, req, bflag);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint Toggle Reset */
+static void _nbu2ss_endpoint_toggle_reset(
+ struct nbu2ss_udc *udc,
+ u8 ep_adrs)
+{
+ u8 num;
+ u32 data;
+
+ if ((ep_adrs == 0) || (ep_adrs == 0x80))
+ return;
+
+ num = (ep_adrs & 0x7F) - 1;
+
+ if (ep_adrs & USB_DIR_IN)
+ data = EPn_IPIDCLR;
+ else
+ data = EPn_BCLR | EPn_OPIDCLR;
+
+ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data);
+}
+
+/*-------------------------------------------------------------------------*/
+/* Endpoint STALL set */
+static void _nbu2ss_set_endpoint_stall(
+ struct nbu2ss_udc *udc,
+ u8 ep_adrs,
+ bool bstall)
+{
+ u8 num, epnum;
+ u32 data;
+ struct nbu2ss_ep *ep;
+ struct fc_regs *preg = udc->p_regs;
+
+ if ((ep_adrs == 0) || (ep_adrs == 0x80)) {
+ if (bstall) {
+ /* Set STALL */
+ _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_STL);
+ } else {
+ /* Clear STALL */
+ _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_STL);
+ }
+ } else {
+ epnum = ep_adrs & USB_ENDPOINT_NUMBER_MASK;
+ num = epnum - 1;
+ ep = &udc->ep[epnum];
+
+ if (bstall) {
+ /* Set STALL */
+ ep->halted = TRUE;
+
+ if (ep_adrs & USB_DIR_IN)
+ data = EPn_BCLR | EPn_ISTL;
+ else
+ data = EPn_OSTL_EN | EPn_OSTL;
+
+ _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data);
+ } else {
+ /* Clear STALL */
+ ep->stalled = FALSE;
+ if (ep_adrs & USB_DIR_IN) {
+ _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL
+ , EPn_ISTL);
+ } else {
+ data =
+ _nbu2ss_readl(&preg->EP_REGS[num].EP_CONTROL);
+
+ data &= ~EPn_OSTL;
+ data |= EPn_OSTL_EN;
+
+ _nbu2ss_writel(&preg->EP_REGS[num].EP_CONTROL
+ , data);
+ }
+
+ ep->stalled = FALSE;
+ if (ep->halted) {
+ ep->halted = FALSE;
+ _nbu2ss_restert_transfer(ep);
+ }
+ }
+ }
+}
+
+
+/*-------------------------------------------------------------------------*/
+/* Device Descriptor */
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof(device_desc),
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = cpu_to_le16(0x0200),
+ .bDeviceClass = USB_CLASS_VENDOR_SPEC,
+ .bDeviceSubClass = 0x00,
+ .bDeviceProtocol = 0x00,
+ .bMaxPacketSize0 = 64,
+ .idVendor = cpu_to_le16(0x0409),
+ .idProduct = cpu_to_le16(0xfff0),
+ .bcdDevice = 0xffff,
+ .iManufacturer = 0x00,
+ .iProduct = 0x00,
+ .iSerialNumber = 0x00,
+ .bNumConfigurations = 0x01,
+};
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_set_test_mode(struct nbu2ss_udc *udc, u32 mode)
+{
+ u32 data;
+
+ if (mode > MAX_TEST_MODE_NUM)
+ return;
+
+ dev_info(udc->dev, "SET FEATURE : test mode = %d\n", mode);
+
+ data = _nbu2ss_readl(&udc->p_regs->USB_CONTROL);
+ data &= ~TEST_FORCE_ENABLE;
+ data |= mode << TEST_MODE_SHIFT;
+
+ _nbu2ss_writel(&udc->p_regs->USB_CONTROL, data);
+ _nbu2ss_bitset(&udc->p_regs->TEST_CONTROL, CS_TESTMODEEN);
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_set_feature_device(
+ struct nbu2ss_udc *udc,
+ u16 selector,
+ u16 wIndex
+)
+{
+ int result = -EOPNOTSUPP;
+
+ switch (selector) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ if (0x0000 == wIndex) {
+ udc->remote_wakeup = U2F_ENABLE;
+ result = 0;
+ }
+ break;
+
+ case USB_DEVICE_TEST_MODE:
+ wIndex >>= 8;
+ if (wIndex <= MAX_TEST_MODE_NUM)
+ result = 0;
+ break;
+
+ default:
+ break;
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_get_ep_stall(struct nbu2ss_udc *udc, u8 ep_adrs)
+{
+ u8 epnum;
+ u32 data = 0, bit_data;
+ struct fc_regs *preg = udc->p_regs;
+
+ epnum = ep_adrs & ~USB_ENDPOINT_DIR_MASK;
+ if (epnum == 0) {
+ data = _nbu2ss_readl(&preg->EP0_CONTROL);
+ bit_data = EP0_STL;
+
+ } else {
+ data = _nbu2ss_readl(&preg->EP_REGS[epnum-1].EP_CONTROL);
+ if ((data & EPn_EN) == 0)
+ return -1;
+
+ if (ep_adrs & USB_ENDPOINT_DIR_MASK)
+ bit_data = EPn_ISTL;
+ else
+ bit_data = EPn_OSTL;
+ }
+
+ if ((data & bit_data) == 0)
+ return 0;
+ return 1;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline int _nbu2ss_req_feature(struct nbu2ss_udc *udc, bool bset)
+{
+ u8 recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK);
+ u8 direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN);
+ u16 selector = udc->ctrl.wValue;
+ u16 wIndex = udc->ctrl.wIndex;
+ u8 ep_adrs;
+ int result = -EOPNOTSUPP;
+
+ if ((0x0000 != udc->ctrl.wLength) ||
+ (USB_DIR_OUT != direction)) {
+ return -EINVAL;
+ }
+
+ switch (recipient) {
+ case USB_RECIP_DEVICE:
+ if (bset)
+ result =
+ _nbu2ss_set_feature_device(udc, selector, wIndex);
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ if (0x0000 == (wIndex & 0xFF70)) {
+ if (USB_ENDPOINT_HALT == selector) {
+ ep_adrs = wIndex & 0xFF;
+ if (bset == FALSE) {
+ _nbu2ss_endpoint_toggle_reset(
+ udc, ep_adrs);
+ }
+
+ _nbu2ss_set_endpoint_stall(
+ udc, ep_adrs, bset);
+
+ result = 0;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (result >= 0)
+ _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0);
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline enum usb_device_speed _nbu2ss_get_speed(struct nbu2ss_udc *udc)
+{
+ u32 data;
+ enum usb_device_speed speed = USB_SPEED_FULL;
+
+ data = _nbu2ss_readl(&udc->p_regs->USB_STATUS);
+ if (data & HIGH_SPEED)
+ speed = USB_SPEED_HIGH;
+
+ return speed;
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_epn_set_stall(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep
+)
+{
+ u8 ep_adrs;
+ u32 regdata;
+ int limit_cnt = 0;
+
+ struct fc_regs *preg = udc->p_regs;
+
+ if (ep->direct == USB_DIR_IN) {
+ for (limit_cnt = 0
+ ; limit_cnt < IN_DATA_EMPTY_COUNT
+ ; limit_cnt++) {
+
+ regdata = _nbu2ss_readl(
+ &preg->EP_REGS[ep->epnum-1].EP_STATUS);
+
+ if ((regdata & EPn_IN_DATA) == 0)
+ break;
+
+ mdelay(1);
+ }
+ }
+
+ ep_adrs = ep->epnum | ep->direct;
+ _nbu2ss_set_endpoint_stall(udc, ep_adrs, 1);
+}
+
+/*-------------------------------------------------------------------------*/
+static int std_req_get_status(struct nbu2ss_udc *udc)
+{
+ u32 length;
+ u16 status_data = 0;
+ u8 recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK);
+ u8 direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN);
+ u8 ep_adrs;
+ int result = -EINVAL;
+
+ if ((0x0000 != udc->ctrl.wValue)
+ || (USB_DIR_IN != direction)) {
+
+ return result;
+ }
+
+ length = min_t(u16, udc->ctrl.wLength, sizeof(status_data));
+
+ switch (recipient) {
+ case USB_RECIP_DEVICE:
+ if (udc->ctrl.wIndex == 0x0000) {
+ if (udc->gadget.is_selfpowered)
+ status_data |= (1 << USB_DEVICE_SELF_POWERED);
+
+ if (udc->remote_wakeup)
+ status_data |= (1 << USB_DEVICE_REMOTE_WAKEUP);
+
+ result = 0;
+ }
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ if (0x0000 == (udc->ctrl.wIndex & 0xFF70)) {
+ ep_adrs = (u8)(udc->ctrl.wIndex & 0xFF);
+ result = _nbu2ss_get_ep_stall(udc, ep_adrs);
+
+ if (result > 0)
+ status_data |= (1 << USB_ENDPOINT_HALT);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (result >= 0) {
+ memcpy(udc->ep0_buf, &status_data, length);
+ _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, length);
+ _nbu2ss_ep0_in_transfer(udc, &udc->ep[0], &udc->ep0_req);
+
+ } else {
+ dev_err(udc->dev, " Error GET_STATUS\n");
+ }
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int std_req_clear_feature(struct nbu2ss_udc *udc)
+{
+ return _nbu2ss_req_feature(udc, FALSE);
+}
+
+/*-------------------------------------------------------------------------*/
+static int std_req_set_feature(struct nbu2ss_udc *udc)
+{
+ return _nbu2ss_req_feature(udc, TRUE);
+}
+
+/*-------------------------------------------------------------------------*/
+static int std_req_set_address(struct nbu2ss_udc *udc)
+{
+ int result = 0;
+ u32 wValue = udc->ctrl.wValue;
+
+ if ((0x00 != udc->ctrl.bRequestType) ||
+ (0x0000 != udc->ctrl.wIndex) ||
+ (0x0000 != udc->ctrl.wLength)) {
+ return -EINVAL;
+ }
+
+ if (wValue != (wValue & 0x007F))
+ return -EINVAL;
+
+ wValue <<= USB_ADRS_SHIFT;
+
+ _nbu2ss_writel(&udc->p_regs->USB_ADDRESS, wValue);
+ _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0);
+
+ return result;
+}
+
+/*-------------------------------------------------------------------------*/
+static int std_req_set_configuration(struct nbu2ss_udc *udc)
+{
+ u32 ConfigValue = (u32)(udc->ctrl.wValue & 0x00ff);
+
+ if ((0x0000 != udc->ctrl.wIndex) ||
+ (0x0000 != udc->ctrl.wLength) ||
+ (0x00 != udc->ctrl.bRequestType)) {
+ return -EINVAL;
+ }
+
+ udc->curr_config = ConfigValue;
+
+ if (ConfigValue > 0) {
+ _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, CONF);
+ udc->devstate = USB_STATE_CONFIGURED;
+
+ } else {
+ _nbu2ss_bitclr(&udc->p_regs->USB_CONTROL, CONF);
+ udc->devstate = USB_STATE_ADDRESS;
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_read_request_data(struct nbu2ss_udc *udc, u32 *pdata)
+{
+ if ((udc == NULL) && (pdata == NULL))
+ return;
+
+ *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA0);
+ pdata++;
+ *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA1);
+}
+
+/*-------------------------------------------------------------------------*/
+static inline int _nbu2ss_decode_request(struct nbu2ss_udc *udc)
+{
+ bool bcall_back = TRUE;
+ int nret = -EINVAL;
+ struct usb_ctrlrequest *p_ctrl;
+
+ p_ctrl = &udc->ctrl;
+ _nbu2ss_read_request_data(udc, (u32 *)p_ctrl);
+
+ /* ep0 state control */
+ if (p_ctrl->wLength == 0) {
+ udc->ep0state = EP0_IN_STATUS_PHASE;
+
+ } else {
+ if (p_ctrl->bRequestType & USB_DIR_IN)
+ udc->ep0state = EP0_IN_DATA_PHASE;
+ else
+ udc->ep0state = EP0_OUT_DATA_PHASE;
+ }
+
+ if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (p_ctrl->bRequest) {
+ case USB_REQ_GET_STATUS:
+ nret = std_req_get_status(udc);
+ bcall_back = FALSE;
+ break;
+
+ case USB_REQ_CLEAR_FEATURE:
+ nret = std_req_clear_feature(udc);
+ bcall_back = FALSE;
+ break;
+
+ case USB_REQ_SET_FEATURE:
+ nret = std_req_set_feature(udc);
+ bcall_back = FALSE;
+ break;
+
+ case USB_REQ_SET_ADDRESS:
+ nret = std_req_set_address(udc);
+ bcall_back = FALSE;
+ break;
+
+ case USB_REQ_SET_CONFIGURATION:
+ nret = std_req_set_configuration(udc);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (bcall_back == FALSE) {
+ if (udc->ep0state == EP0_IN_STATUS_PHASE) {
+ if (nret >= 0) {
+ /*--------------------------------------*/
+ /* Status Stage */
+ nret = EP0_send_NULL(udc, TRUE);
+ }
+ }
+
+ } else {
+ spin_unlock(&udc->lock);
+ nret = udc->driver->setup(&udc->gadget, &udc->ctrl);
+ spin_lock(&udc->lock);
+ }
+
+ if (nret < 0)
+ udc->ep0state = EP0_IDLE;
+
+ return nret;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline int _nbu2ss_ep0_in_data_stage(struct nbu2ss_udc *udc)
+{
+ int nret;
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep = &udc->ep[0];
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
+
+ if (req == NULL)
+ req = &udc->ep0_req;
+
+ req->req.actual += req->div_len;
+ req->div_len = 0;
+
+ nret = _nbu2ss_ep0_in_transfer(udc, ep, req);
+ if (nret == 0) {
+ udc->ep0state = EP0_OUT_STATUS_PAHSE;
+ EP0_receive_NULL(udc, TRUE);
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline int _nbu2ss_ep0_out_data_stage(struct nbu2ss_udc *udc)
+{
+ int nret;
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep = &udc->ep[0];
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
+
+ if (req == NULL)
+ req = &udc->ep0_req;
+
+ nret = _nbu2ss_ep0_out_transfer(udc, ep, req);
+ if (nret == 0) {
+ udc->ep0state = EP0_IN_STATUS_PHASE;
+ EP0_send_NULL(udc, TRUE);
+
+ } else if (nret < 0) {
+ _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, EP0_BCLR);
+ req->req.status = nret;
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline int _nbu2ss_ep0_status_stage(struct nbu2ss_udc *udc)
+{
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep = &udc->ep[0];
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
+
+ if (req == NULL) {
+ req = &udc->ep0_req;
+ if (req->req.complete)
+ req->req.complete(&ep->ep, &req->req);
+
+ } else {
+ if (req->req.complete)
+ _nbu2ss_ep_done(ep, req, 0);
+ }
+
+ udc->ep0state = EP0_IDLE;
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_ep0_int(struct nbu2ss_udc *udc)
+{
+ int i;
+ u32 status;
+ u32 intr;
+ int nret = -1;
+
+ status = _nbu2ss_readl(&udc->p_regs->EP0_STATUS);
+ intr = status & EP0_STATUS_RW_BIT;
+ _nbu2ss_writel(&udc->p_regs->EP0_STATUS, ~(u32)intr);
+
+ status &= (SETUP_INT | EP0_IN_INT | EP0_OUT_INT
+ | STG_END_INT | EP0_OUT_NULL_INT);
+
+ if (status == 0) {
+ dev_info(udc->dev, "%s Not Decode Interrupt\n", __func__);
+ dev_info(udc->dev, "EP0_STATUS = 0x%08x\n", intr);
+ return;
+ }
+
+ if (udc->gadget.speed == USB_SPEED_UNKNOWN)
+ udc->gadget.speed = _nbu2ss_get_speed(udc);
+
+ for (i = 0; i < EP0_END_XFER; i++) {
+ switch (udc->ep0state) {
+ case EP0_IDLE:
+ if (status & SETUP_INT) {
+ status = 0;
+ nret = _nbu2ss_decode_request(udc);
+ }
+ break;
+
+ case EP0_IN_DATA_PHASE:
+ if (status & EP0_IN_INT) {
+ status &= ~EP0_IN_INT;
+ nret = _nbu2ss_ep0_in_data_stage(udc);
+ }
+ break;
+
+ case EP0_OUT_DATA_PHASE:
+ if (status & EP0_OUT_INT) {
+ status &= ~EP0_OUT_INT;
+ nret = _nbu2ss_ep0_out_data_stage(udc);
+ }
+ break;
+
+ case EP0_IN_STATUS_PHASE:
+ if ((status & STG_END_INT) || (status & SETUP_INT)) {
+ status &= ~(STG_END_INT | EP0_IN_INT);
+ nret = _nbu2ss_ep0_status_stage(udc);
+ }
+ break;
+
+ case EP0_OUT_STATUS_PAHSE:
+ if ((status & STG_END_INT)
+ || (status & SETUP_INT)
+ || (status & EP0_OUT_NULL_INT)) {
+ status &= ~(STG_END_INT
+ | EP0_OUT_INT
+ | EP0_OUT_NULL_INT);
+
+ nret = _nbu2ss_ep0_status_stage(udc);
+ }
+
+ break;
+
+ default:
+ status = 0;
+ break;
+ }
+
+ if (status == 0)
+ break;
+ }
+
+ if (nret < 0) {
+ /* Send Stall */
+ _nbu2ss_set_endpoint_stall(udc, 0, TRUE);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_ep_done(
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req,
+ int status)
+{
+ struct nbu2ss_udc *udc = ep->udc;
+
+ list_del_init(&req->queue);
+
+ if (status == -ECONNRESET)
+ _nbu2ss_fifo_flush(udc, ep);
+
+ if (likely(req->req.status == -EINPROGRESS))
+ req->req.status = status;
+
+ if (ep->stalled)
+ _nbu2ss_epn_set_stall(udc, ep);
+ else {
+ if (!list_empty(&ep->queue))
+ _nbu2ss_restert_transfer(ep);
+ }
+
+#ifdef USE_DMA
+ if ((ep->direct == USB_DIR_OUT) && (ep->epnum > 0) &&
+ (req->req.dma != 0))
+ _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_OUT);
+#endif
+
+ spin_unlock(&udc->lock);
+ req->req.complete(&ep->ep, &req->req);
+ spin_lock(&udc->lock);
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_epn_in_int(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req)
+{
+ int result = 0;
+ u32 status;
+
+ struct fc_regs *preg = udc->p_regs;
+
+ if (req->dma_flag)
+ return; /* DMA is forwarded */
+
+ req->req.actual += req->div_len;
+ req->div_len = 0;
+
+ if (req->req.actual != req->req.length) {
+ /*---------------------------------------------------------*/
+ /* remainder of data */
+ result = _nbu2ss_epn_in_transfer(udc, ep, req);
+
+ } else {
+ if (req->zero && ((req->req.actual % ep->ep.maxpacket) == 0)) {
+
+ status =
+ _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_STATUS);
+
+ if ((status & EPn_IN_FULL) == 0) {
+ /*-----------------------------------------*/
+ /* 0 Length Packet */
+ req->zero = false;
+ _nbu2ss_zero_len_pkt(udc, ep->epnum);
+ }
+ return;
+ }
+ }
+
+ if (result <= 0) {
+ /*---------------------------------------------------------*/
+ /* Complete */
+ _nbu2ss_ep_done(ep, req, result);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_epn_out_int(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req)
+{
+ int result;
+
+ result = _nbu2ss_epn_out_transfer(udc, ep, req);
+ if (result <= 0)
+ _nbu2ss_ep_done(ep, req, result);
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_epn_in_dma_int(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req)
+{
+ u32 mpkt;
+ u32 size;
+ struct usb_request *preq;
+
+ preq = &req->req;
+
+ if (req->dma_flag == FALSE)
+ return;
+
+ preq->actual += req->div_len;
+ req->div_len = 0;
+ req->dma_flag = FALSE;
+
+#ifdef USE_DMA
+ _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_IN);
+#endif
+
+ if (preq->actual != preq->length) {
+ _nbu2ss_epn_in_transfer(udc, ep, req);
+ } else {
+ mpkt = ep->ep.maxpacket;
+ size = preq->actual % mpkt;
+ if (size > 0) {
+ if (((preq->actual & 0x03) == 0) && (size < mpkt))
+ _nbu2ss_ep_in_end(udc, ep->epnum, 0, 0);
+ } else {
+ _nbu2ss_epn_in_int(udc, ep, req);
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_epn_out_dma_int(
+ struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ struct nbu2ss_req *req)
+{
+ int i;
+ u32 num;
+ u32 dmacnt, ep_dmacnt;
+ u32 mpkt;
+ struct fc_regs *preg = udc->p_regs;
+
+ num = ep->epnum - 1;
+
+ if (req->req.actual == req->req.length) {
+ if ((req->req.length % ep->ep.maxpacket) && !req->zero) {
+ req->div_len = 0;
+ req->dma_flag = FALSE;
+ _nbu2ss_ep_done(ep, req, 0);
+ return;
+ }
+ }
+
+ ep_dmacnt = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT)
+ & EPn_DMACNT;
+ ep_dmacnt >>= 16;
+
+ for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) {
+ dmacnt = _nbu2ss_readl(&preg->EP_DCR[num].EP_DCR1)
+ & DCR1_EPn_DMACNT;
+ dmacnt >>= 16;
+ if (ep_dmacnt == dmacnt)
+ break;
+ }
+
+ _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPn_REQEN);
+
+ if (dmacnt != 0) {
+ mpkt = ep->ep.maxpacket;
+ if ((req->div_len % mpkt) == 0)
+ req->div_len -= mpkt * dmacnt;
+ }
+
+ if ((req->req.actual % ep->ep.maxpacket) > 0) {
+ if (req->req.actual == req->div_len) {
+ req->div_len = 0;
+ req->dma_flag = FALSE;
+ _nbu2ss_ep_done(ep, req, 0);
+ return;
+ }
+ }
+
+ req->req.actual += req->div_len;
+ req->div_len = 0;
+ req->dma_flag = FALSE;
+
+ _nbu2ss_epn_out_int(udc, ep, req);
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_epn_int(struct nbu2ss_udc *udc, u32 epnum)
+{
+ u32 num;
+ u32 status;
+
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep = &udc->ep[epnum];
+
+ num = epnum - 1;
+
+ /* Interrupt Status */
+ status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS);
+
+ /* Interrupt Clear */
+ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_STATUS, ~(u32)status);
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct nbu2ss_req, queue);
+
+ if (req == NULL) {
+ /* pr_warn("=== %s(%d) req == NULL\n", __func__, epnum); */
+ return;
+ }
+
+ if (status & EPn_OUT_END_INT) {
+ status &= ~EPn_OUT_INT;
+ _nbu2ss_epn_out_dma_int(udc, ep, req);
+ }
+
+ if (status & EPn_OUT_INT)
+ _nbu2ss_epn_out_int(udc, ep, req);
+
+ if (status & EPn_IN_END_INT) {
+ status &= ~EPn_IN_INT;
+ _nbu2ss_epn_in_dma_int(udc, ep, req);
+ }
+
+ if (status & EPn_IN_INT)
+ _nbu2ss_epn_in_int(udc, ep, req);
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_ep_int(struct nbu2ss_udc *udc, u32 epnum)
+{
+ if (epnum == 0)
+ _nbu2ss_ep0_int(udc);
+ else
+ _nbu2ss_epn_int(udc, epnum);
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_ep0_enable(struct nbu2ss_udc *udc)
+{
+ _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, (EP0_AUTO | EP0_BCLR));
+ _nbu2ss_writel(&udc->p_regs->EP0_INT_ENA, EP0_INT_EN_BIT);
+}
+
+#if 0
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_ep0_disable(struct nbu2ss_udc *udc)
+{
+ _nbu2ss_bitclr(&udc->p_regs->EP0_INT_ENA, EP0_INT_EN_BIT);
+
+ _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL
+ , (EP0_BCLR | EP0_INAK | EP0_ONAK | EP0_BCLR));
+
+ _nbu2ss_bitclr(&udc->p_regs->EP0_CONTROL, EP0_AUTO);
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_nuke(struct nbu2ss_udc *udc,
+ struct nbu2ss_ep *ep,
+ int status)
+{
+ struct nbu2ss_req *req;
+
+ /* Endpoint Disable */
+ _nbu2ss_epn_exit(udc, ep);
+
+ /* DMA Disable */
+ _nbu2ss_ep_dma_exit(udc, ep);
+
+ if (list_empty(&ep->queue))
+ return 0;
+
+ /* called with irqs blocked */
+ list_for_each_entry(req, &ep->queue, queue) {
+ _nbu2ss_ep_done(ep, req, status);
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_quiesce(struct nbu2ss_udc *udc)
+{
+ struct nbu2ss_ep *ep;
+
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+
+ _nbu2ss_nuke(udc, &udc->ep[0], -ESHUTDOWN);
+
+ /* Endpoint n */
+ list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
+ _nbu2ss_nuke(udc, ep, -ESHUTDOWN);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_pullup(struct nbu2ss_udc *udc, int is_on)
+{
+ u32 reg_dt;
+
+ if (udc->vbus_active == 0)
+ return -ESHUTDOWN;
+
+ if (is_on) {
+ /* D+ Pullup */
+/* INFO(" --- D+ Pullup\n"); */
+
+ if (udc->driver) {
+ reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL)
+ | PUE2) & ~(u32)CONNECTB;
+
+ _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt);
+ }
+
+ } else {
+ /* D+ Pulldown */
+/* INFO(" --- D+ Pulldown\n"); */
+
+ reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL) | CONNECTB)
+ & ~(u32)PUE2;
+
+ _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt);
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_fifo_flush(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep)
+{
+ struct fc_regs *p = udc->p_regs;
+
+ if (udc->vbus_active == 0)
+ return;
+
+ if (ep->epnum == 0) {
+ /* EP0 */
+ _nbu2ss_bitset(&p->EP0_CONTROL, EP0_BCLR);
+
+ } else {
+ /* EPn */
+ _nbu2ss_ep_dma_abort(udc, ep);
+ _nbu2ss_bitset(&p->EP_REGS[ep->epnum - 1].EP_CONTROL, EPn_BCLR);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static int _nbu2ss_enable_controller(struct nbu2ss_udc *udc)
+{
+ int waitcnt = 0;
+
+ if (udc->udc_enabled)
+ return 0;
+
+#if 0
+ emxx_open_clockgate(EMXX_CLK_USB1);
+ /* emxx_clkctrl_off(EMXX_CLKCTRL_USB1); */
+ /* emxx_clkctrl_on(EMXX_CLKCTRL_USB1); */
+ emxx_unreset_device(EMXX_RST_USB1);
+#endif
+ /*
+ Reset
+ */
+ _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST));
+ udelay(EPC_RST_DISABLE_TIME); /* 1us wait */
+
+ _nbu2ss_bitclr(&udc->p_regs->EPCTR, DIRPD);
+ mdelay(EPC_DIRPD_DISABLE_TIME); /* 1ms wait */
+
+ _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST);
+
+ _nbu2ss_writel(&udc->p_regs->AHBSCTR, WAIT_MODE);
+
+#if 0
+ /* DMA Mode Setting */
+ if ((system_rev & EMXX_REV_MASK) == EMXX_REV_ES1) {
+ _nbu2ss_bitset(&udc->p_regs->AHBMCTR, BURST_TYPE);
+ _nbu2ss_bitclr(&udc->p_regs->AHBMCTR, HTRANS_MODE);
+ } else
+#endif
+ _nbu2ss_writel(&udc->p_regs->AHBMCTR,
+ HBUSREQ_MODE | HTRANS_MODE | WBURST_TYPE);
+
+ while (!(_nbu2ss_readl(&udc->p_regs->EPCTR) & PLL_LOCK)) {
+ waitcnt++;
+ udelay(1); /* 1us wait */
+ if (waitcnt == EPC_PLL_LOCK_COUNT) {
+ dev_err(udc->dev, "*** Reset Cancel failed\n");
+ return -EINVAL;
+ }
+ };
+
+#if 0
+ if ((system_rev & EMXX_REV_MASK) < EMXX_REV_ES3)
+#endif
+ _nbu2ss_bitset(&udc->p_regs->UTMI_CHARACTER_1, USB_SQUSET);
+
+ _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, (INT_SEL | SOF_RCV));
+
+ /* EP0 */
+ _nbu2ss_ep0_enable(udc);
+
+ /* USB Interrupt Enable */
+ _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, USB_INT_EN_BIT);
+
+ udc->udc_enabled = TRUE;
+
+ return 0;
+}
+
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_reset_controller(struct nbu2ss_udc *udc)
+{
+ _nbu2ss_bitset(&udc->p_regs->EPCTR, EPC_RST);
+ _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST);
+}
+
+/*-------------------------------------------------------------------------*/
+static void _nbu2ss_disable_controller(struct nbu2ss_udc *udc)
+{
+ if (udc->udc_enabled) {
+ udc->udc_enabled = FALSE;
+ _nbu2ss_reset_controller(udc);
+ _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST));
+ }
+#if 0
+ emxx_reset_device(EMXX_RST_USB1);
+ /* emxx_clkctrl_on(EMXX_CLKCTRL_USB1); */
+ emxx_close_clockgate(EMXX_CLK_USB1);
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_check_vbus(struct nbu2ss_udc *udc)
+{
+ int nret;
+ u32 reg_dt;
+
+ /* chattering */
+ mdelay(VBUS_CHATTERING_MDELAY); /* wait (ms) */
+
+ /* VBUS ON Check*/
+ reg_dt = gpio_get_value(VBUS_VALUE);
+ if (reg_dt == 0) {
+
+ udc->linux_suspended = 0;
+
+ _nbu2ss_reset_controller(udc);
+ dev_info(udc->dev, " ----- VBUS OFF\n");
+
+ if (udc->vbus_active == 1) {
+ /* VBUS OFF */
+ udc->vbus_active = 0;
+ if (udc->usb_suspended) {
+ udc->usb_suspended = 0;
+ /* _nbu2ss_reset_controller(udc); */
+ }
+ udc->devstate = USB_STATE_NOTATTACHED;
+
+ _nbu2ss_quiesce(udc);
+ if (udc->driver) {
+ spin_unlock(&udc->lock);
+ udc->driver->disconnect(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+
+ _nbu2ss_disable_controller(udc);
+ }
+ } else {
+ mdelay(5); /* wait (5ms) */
+ reg_dt = gpio_get_value(VBUS_VALUE);
+ if (reg_dt == 0)
+ return;
+
+ dev_info(udc->dev, " ----- VBUS ON\n");
+
+ if (udc->linux_suspended)
+ return;
+
+ if (udc->vbus_active == 0) {
+ /* VBUS ON */
+ udc->vbus_active = 1;
+ udc->devstate = USB_STATE_POWERED;
+
+ nret = _nbu2ss_enable_controller(udc);
+ if (nret < 0) {
+ _nbu2ss_disable_controller(udc);
+ udc->vbus_active = 0;
+ return;
+ }
+
+ _nbu2ss_pullup(udc, 1);
+
+#ifdef UDC_DEBUG_DUMP
+ _nbu2ss_dump_register(udc);
+#endif /* UDC_DEBUG_DUMP */
+
+ } else {
+ if (udc->devstate == USB_STATE_POWERED)
+ _nbu2ss_pullup(udc, 1);
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_int_bus_reset(struct nbu2ss_udc *udc)
+{
+ udc->devstate = USB_STATE_DEFAULT;
+ udc->remote_wakeup = 0;
+
+ _nbu2ss_quiesce(udc);
+
+ udc->ep0state = EP0_IDLE;
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_int_usb_resume(struct nbu2ss_udc *udc)
+{
+ if (udc->usb_suspended == 1) {
+ udc->usb_suspended = 0;
+ if (udc->driver && udc->driver->resume) {
+ spin_unlock(&udc->lock);
+ udc->driver->resume(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static inline void _nbu2ss_int_usb_suspend(struct nbu2ss_udc *udc)
+{
+ u32 reg_dt;
+
+ if (udc->usb_suspended == 0) {
+ reg_dt = gpio_get_value(VBUS_VALUE);
+
+ if (reg_dt == 0)
+ return;
+
+ udc->usb_suspended = 1;
+ if (udc->driver && udc->driver->suspend) {
+ spin_unlock(&udc->lock);
+ udc->driver->suspend(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+
+ _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, SUSPEND);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+/* VBUS (GPIO153) Interrupt */
+static irqreturn_t _nbu2ss_vbus_irq(int irq, void *_udc)
+{
+ struct nbu2ss_udc *udc = (struct nbu2ss_udc *)_udc;
+
+ spin_lock(&udc->lock);
+ _nbu2ss_check_vbus(udc);
+ spin_unlock(&udc->lock);
+
+ return IRQ_HANDLED;
+}
+
+/*-------------------------------------------------------------------------*/
+/* Interrupt (udc) */
+static irqreturn_t _nbu2ss_udc_irq(int irq, void *_udc)
+{
+ u8 suspend_flag = 0;
+ u32 status;
+ u32 epnum, int_bit;
+
+ struct nbu2ss_udc *udc = (struct nbu2ss_udc *)_udc;
+ struct fc_regs *preg = udc->p_regs;
+
+ if (gpio_get_value(VBUS_VALUE) == 0) {
+ _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW);
+ _nbu2ss_writel(&preg->USB_INT_ENA, 0);
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(&udc->lock);
+
+ for (;;) {
+ if (gpio_get_value(VBUS_VALUE) == 0) {
+ _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW);
+ _nbu2ss_writel(&preg->USB_INT_ENA, 0);
+ status = 0;
+ } else
+ status = _nbu2ss_readl(&preg->USB_INT_STA);
+
+ if (status == 0)
+ break;
+
+ _nbu2ss_writel(&preg->USB_INT_STA, ~(status & USB_INT_STA_RW));
+
+ if (status & USB_RST_INT) {
+ /* USB Reset */
+ _nbu2ss_int_bus_reset(udc);
+ }
+
+ if (status & RSUM_INT) {
+ /* Resume */
+ _nbu2ss_int_usb_resume(udc);
+ }
+
+ if (status & SPND_INT) {
+ /* Suspend */
+ suspend_flag = 1;
+ }
+
+ if (status & EPn_INT) {
+ /* EP INT */
+ int_bit = status >> 8;
+
+ for (epnum = 0; epnum < NUM_ENDPOINTS; epnum++) {
+
+ if (0x01 & int_bit)
+ _nbu2ss_ep_int(udc, epnum);
+
+ int_bit >>= 1;
+
+ if (int_bit == 0)
+ break;
+ }
+ }
+ }
+
+ if (suspend_flag)
+ _nbu2ss_int_usb_suspend(udc);
+
+ spin_unlock(&udc->lock);
+
+ return IRQ_HANDLED;
+}
+
+/*-------------------------------------------------------------------------*/
+/* usb_ep_ops */
+static int nbu2ss_ep_enable(
+ struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ u8 ep_type;
+ unsigned long flags;
+
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+
+ if ((_ep == NULL) || (desc == NULL)) {
+ pr_err(" *** %s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if ((ep == NULL) || (ep->udc == NULL)) {
+ pr_err(" *** %s, ep == NULL !!\n", __func__);
+ return -EINVAL;
+ }
+
+ ep_type = usb_endpoint_type(desc);
+ if ((ep_type == USB_ENDPOINT_XFER_CONTROL)
+ || (ep_type == USB_ENDPOINT_XFER_ISOC)) {
+
+ pr_err(" *** %s, bat bmAttributes\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (udc->vbus_active == 0)
+ return -ESHUTDOWN;
+
+ if ((udc->driver == NULL)
+ || (udc->gadget.speed == USB_SPEED_UNKNOWN)) {
+
+ dev_err(ep->udc->dev, " *** %s, udc !!\n", __func__);
+ return -ESHUTDOWN;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ ep->desc = desc;
+ ep->epnum = usb_endpoint_num(desc);
+ ep->direct = desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
+ ep->ep_type = ep_type;
+ ep->wedged = 0;
+ ep->halted = FALSE;
+ ep->stalled = FALSE;
+
+ ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+
+ /* DMA setting */
+ _nbu2ss_ep_dma_init(udc, ep);
+
+ /* Endpoint setting */
+ _nbu2ss_ep_init(udc, ep);
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_ep_disable(struct usb_ep *_ep)
+{
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+ if (_ep == NULL) {
+ pr_err(" *** %s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if ((ep == NULL) || (ep->udc == NULL)) {
+ pr_err("udc: *** %s, ep == NULL !!\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (udc->vbus_active == 0)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ _nbu2ss_nuke(udc, ep, -EINPROGRESS); /* dequeue request */
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static struct usb_request *nbu2ss_ep_alloc_request(
+ struct usb_ep *ep,
+ gfp_t gfp_flags)
+{
+ struct nbu2ss_req *req;
+
+ req = kzalloc(sizeof(*req), gfp_flags);
+ if (!req)
+ return 0;
+
+#ifdef USE_DMA
+ req->req.dma = DMA_ADDR_INVALID;
+#endif
+ INIT_LIST_HEAD(&req->queue);
+
+ return &req->req;
+}
+
+/*-------------------------------------------------------------------------*/
+static void nbu2ss_ep_free_request(
+ struct usb_ep *_ep,
+ struct usb_request *_req)
+{
+ struct nbu2ss_req *req;
+
+ if (_req != NULL) {
+ req = container_of(_req, struct nbu2ss_req, req);
+
+ kfree(req);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_ep_queue(
+ struct usb_ep *_ep,
+ struct usb_request *_req,
+ gfp_t gfp_flags)
+{
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+ bool bflag;
+ int result = -EINVAL;
+
+ /* catch various bogus parameters */
+ if ((_ep == NULL) || (_req == NULL)) {
+ if (_ep == NULL)
+ pr_err("udc: %s --- _ep == NULL\n", __func__);
+
+ if (_req == NULL)
+ pr_err("udc: %s --- _req == NULL\n", __func__);
+
+ return -EINVAL;
+ }
+
+ req = container_of(_req, struct nbu2ss_req, req);
+ if (unlikely
+ (!_req->complete || !_req->buf
+ || !list_empty(&req->queue))) {
+
+ if (!_req->complete)
+ pr_err("udc: %s --- !_req->complete\n", __func__);
+
+ if (!_req->buf)
+ pr_err("udc:%s --- !_req->buf\n", __func__);
+
+ if (!list_empty(&req->queue))
+ pr_err("%s --- !list_empty(&req->queue)\n", __func__);
+
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ udc = ep->udc;
+
+/* INFO("=== %s(ep%d), zero=%d\n", __func__, ep->epnum, _req->zero); */
+
+ if (udc->vbus_active == 0) {
+ dev_info(udc->dev, "Can't ep_queue (VBUS OFF)\n");
+ return -ESHUTDOWN;
+ }
+
+ if (unlikely(!udc->driver)) {
+ dev_err(udc->dev, "%s, bogus device state %p\n", __func__,
+ udc->driver);
+ return -ESHUTDOWN;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+#ifdef USE_DMA
+ if ((u32)req->req.buf & 0x3)
+ req->unaligned = TRUE;
+ else
+ req->unaligned = FALSE;
+
+ if (req->unaligned) {
+ if (ep->virt_buf == NULL)
+ ep->virt_buf = (u8 *)dma_alloc_coherent(
+ NULL, PAGE_SIZE,
+ &ep->phys_buf, GFP_ATOMIC | GFP_DMA);
+ if (ep->epnum > 0) {
+ if (ep->direct == USB_DIR_IN)
+ memcpy(ep->virt_buf, req->req.buf,
+ req->req.length);
+ }
+ }
+
+ if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT) &&
+ (req->req.dma != 0))
+ _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_OUT);
+#endif
+
+ _req->status = -EINPROGRESS;
+ _req->actual = 0;
+
+ bflag = list_empty(&ep->queue);
+ list_add_tail(&req->queue, &ep->queue);
+
+ if ((bflag != FALSE) && (ep->stalled == FALSE)) {
+
+ result = _nbu2ss_start_transfer(udc, ep, req, FALSE);
+ if (result < 0) {
+ dev_err(udc->dev, " *** %s, result = %d\n", __func__,
+ result);
+ list_del(&req->queue);
+ } else if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT)) {
+#ifdef USE_DMA
+ if (req->req.length < 4 &&
+ req->req.length == req->req.actual)
+#else
+ if (req->req.length == req->req.actual)
+#endif
+ _nbu2ss_ep_done(ep, req, result);
+ }
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_ep_dequeue(
+ struct usb_ep *_ep,
+ struct usb_request *_req)
+{
+ struct nbu2ss_req *req;
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+ /*INFO("=== %s()\n", __func__);*/
+
+ /* catch various bogus parameters */
+ if ((_ep == NULL) || (_req == NULL)) {
+ /* pr_err("%s, bad param(1)\n", __func__); */
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if (!ep) {
+ pr_err("%s, ep == NULL !!\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (udc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ /* make sure it's actually queued on this endpoint */
+ list_for_each_entry(req, &ep->queue, queue) {
+ if (&req->req == _req)
+ break;
+ }
+ if (&req->req != _req) {
+ spin_unlock_irqrestore(&udc->lock, flags);
+ pr_debug("%s no queue(EINVAL)\n", __func__);
+ return -EINVAL;
+ }
+
+ _nbu2ss_ep_done(ep, req, -ECONNRESET);
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ u8 ep_adrs;
+ unsigned long flags;
+
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (!_ep) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if (!ep) {
+ pr_err("%s, bad ep\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (!udc) {
+ dev_err(ep->udc->dev, " *** %s, bad udc\n", __func__);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ ep_adrs = ep->epnum | ep->direct;
+ if (value == 0) {
+ _nbu2ss_set_endpoint_stall(udc, ep_adrs, value);
+ ep->stalled = FALSE;
+ } else {
+ if (list_empty(&ep->queue))
+ _nbu2ss_epn_set_stall(udc, ep);
+ else
+ ep->stalled = TRUE;
+ }
+
+ if (value == 0)
+ ep->wedged = 0;
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int nbu2ss_ep_set_wedge(struct usb_ep *_ep)
+{
+ return nbu2ss_ep_set_halt(_ep, 1);
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_ep_fifo_status(struct usb_ep *_ep)
+{
+ u32 data;
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+ struct fc_regs *preg;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (!_ep) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if (!ep) {
+ pr_err("%s, bad ep\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (!udc) {
+ dev_err(ep->udc->dev, "%s, bad udc\n", __func__);
+ return -EINVAL;
+ }
+
+ preg = udc->p_regs;
+
+ data = gpio_get_value(VBUS_VALUE);
+ if (data == 0)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ if (ep->epnum == 0) {
+ data = _nbu2ss_readl(&preg->EP0_LENGTH) & EP0_LDATA;
+
+ } else {
+ data = _nbu2ss_readl(&preg->EP_REGS[ep->epnum-1].EP_LEN_DCNT)
+ & EPn_LDATA;
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static void nbu2ss_ep_fifo_flush(struct usb_ep *_ep)
+{
+ u32 data;
+ struct nbu2ss_ep *ep;
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (!_ep) {
+ pr_err("udc: %s, bad param\n", __func__);
+ return;
+ }
+
+ ep = container_of(_ep, struct nbu2ss_ep, ep);
+ if (!_ep) {
+ pr_err("udc: %s, bad ep\n", __func__);
+ return;
+ }
+
+ udc = ep->udc;
+ if (!udc) {
+ dev_err(ep->udc->dev, "%s, bad udc\n", __func__);
+ return;
+ }
+
+ data = gpio_get_value(VBUS_VALUE);
+ if (data == 0)
+ return;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ _nbu2ss_fifo_flush(udc, ep);
+ spin_unlock_irqrestore(&udc->lock, flags);
+}
+
+/*-------------------------------------------------------------------------*/
+static struct usb_ep_ops nbu2ss_ep_ops = {
+ .enable = nbu2ss_ep_enable,
+ .disable = nbu2ss_ep_disable,
+
+ .alloc_request = nbu2ss_ep_alloc_request,
+ .free_request = nbu2ss_ep_free_request,
+
+ .queue = nbu2ss_ep_queue,
+ .dequeue = nbu2ss_ep_dequeue,
+
+ .set_halt = nbu2ss_ep_set_halt,
+ .set_wedge = nbu2ss_ep_set_wedge,
+
+ .fifo_status = nbu2ss_ep_fifo_status,
+ .fifo_flush = nbu2ss_ep_fifo_flush,
+};
+
+
+/*-------------------------------------------------------------------------*/
+/* usb_gadget_ops */
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_get_frame(struct usb_gadget *pgadget)
+{
+ u32 data;
+ struct nbu2ss_udc *udc;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (pgadget == NULL) {
+ pr_err("udc: %s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = container_of(pgadget, struct nbu2ss_udc, gadget);
+ if (udc == NULL) {
+ dev_err(&pgadget->dev, "%s, udc == NULL\n", __func__);
+ return -EINVAL;
+ }
+
+ data = gpio_get_value(VBUS_VALUE);
+ if (data == 0)
+ return -EINVAL;
+
+ data = _nbu2ss_readl(&udc->p_regs->USB_ADDRESS) & FRAME;
+
+ return data;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_wakeup(struct usb_gadget *pgadget)
+{
+ int i;
+ u32 data;
+
+ struct nbu2ss_udc *udc;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (pgadget == NULL) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = container_of(pgadget, struct nbu2ss_udc, gadget);
+ if (udc == NULL) {
+ dev_err(&pgadget->dev, "%s, udc == NULL\n", __func__);
+ return -EINVAL;
+ }
+
+ data = gpio_get_value(VBUS_VALUE);
+ if (data == 0) {
+ dev_warn(&pgadget->dev, "VBUS LEVEL = %d\n", data);
+ return -EINVAL;
+ }
+
+ _nbu2ss_bitset(&udc->p_regs->EPCTR, PLL_RESUME);
+
+ for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) {
+ data = _nbu2ss_readl(&udc->p_regs->EPCTR);
+
+ if (data & PLL_LOCK)
+ break;
+ }
+
+ _nbu2ss_bitclr(&udc->p_regs->EPCTR, PLL_RESUME);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_set_selfpowered(struct usb_gadget *pgadget,
+ int is_selfpowered)
+{
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (pgadget == NULL) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = container_of(pgadget, struct nbu2ss_udc, gadget);
+
+ spin_lock_irqsave(&udc->lock, flags);
+ pgadget->is_selfpowered = (is_selfpowered != 0);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_vbus_session(struct usb_gadget *pgadget, int is_active)
+{
+/* INFO("=== %s()\n", __func__); */
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_vbus_draw(struct usb_gadget *pgadget, unsigned mA)
+{
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (pgadget == NULL) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = container_of(pgadget, struct nbu2ss_udc, gadget);
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->mA = mA;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_pullup(struct usb_gadget *pgadget, int is_on)
+{
+ struct nbu2ss_udc *udc;
+ unsigned long flags;
+
+/* INFO("=== %s()\n", __func__); */
+
+ if (pgadget == NULL) {
+ pr_err("%s, bad param\n", __func__);
+ return -EINVAL;
+ }
+
+ udc = container_of(pgadget, struct nbu2ss_udc, gadget);
+
+ if (udc->driver == NULL) {
+ pr_warn("%s, Not Regist Driver\n", __func__);
+ return -EINVAL;
+ }
+
+ if (udc->vbus_active == 0)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ _nbu2ss_pullup(udc, is_on);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_gad_ioctl(
+ struct usb_gadget *pgadget,
+ unsigned code,
+ unsigned long param)
+{
+/* INFO("=== %s()\n", __func__); */
+ return 0;
+}
+
+
+static const struct usb_gadget_ops nbu2ss_gadget_ops = {
+ .get_frame = nbu2ss_gad_get_frame,
+ .wakeup = nbu2ss_gad_wakeup,
+ .set_selfpowered = nbu2ss_gad_set_selfpowered,
+ .vbus_session = nbu2ss_gad_vbus_session,
+ .vbus_draw = nbu2ss_gad_vbus_draw,
+ .pullup = nbu2ss_gad_pullup,
+ .ioctl = nbu2ss_gad_ioctl,
+};
+
+static const char g_ep0_name[] = "ep0";
+static const char g_ep1_name[] = "ep1-bulk";
+static const char g_ep2_name[] = "ep2-bulk";
+static const char g_ep3_name[] = "ep3in-int";
+static const char g_ep4_name[] = "ep4-iso";
+static const char g_ep5_name[] = "ep5-iso";
+static const char g_ep6_name[] = "ep6-bulk";
+static const char g_ep7_name[] = "ep7-bulk";
+static const char g_ep8_name[] = "ep8in-int";
+static const char g_ep9_name[] = "ep9-iso";
+static const char g_epa_name[] = "epa-iso";
+static const char g_epb_name[] = "epb-bulk";
+static const char g_epc_name[] = "epc-nulk";
+static const char g_epd_name[] = "epdin-int";
+
+static const char *gp_ep_name[NUM_ENDPOINTS] = {
+ g_ep0_name,
+ g_ep1_name,
+ g_ep2_name,
+ g_ep3_name,
+ g_ep4_name,
+ g_ep5_name,
+ g_ep6_name,
+ g_ep7_name,
+ g_ep8_name,
+ g_ep9_name,
+ g_epa_name,
+ g_epb_name,
+ g_epc_name,
+ g_epd_name,
+};
+
+/*-------------------------------------------------------------------------*/
+static void __init nbu2ss_drv_ep_init(struct nbu2ss_udc *udc)
+{
+ int i;
+
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+ udc->gadget.ep0 = &udc->ep[0].ep;
+
+ for (i = 0; i < NUM_ENDPOINTS; i++) {
+ struct nbu2ss_ep *ep = &udc->ep[i];
+
+ ep->udc = udc;
+ ep->desc = NULL;
+
+ ep->ep.driver_data = NULL;
+ ep->ep.name = gp_ep_name[i];
+ ep->ep.ops = &nbu2ss_ep_ops;
+
+ ep->ep.maxpacket = (i == 0 ? EP0_PACKETSIZE : EP_PACKETSIZE);
+
+ list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+ INIT_LIST_HEAD(&ep->queue);
+ }
+
+ list_del_init(&udc->ep[0].ep.ep_list);
+}
+
+/*-------------------------------------------------------------------------*/
+/* platform_driver */
+static int __init nbu2ss_drv_contest_init(
+ struct platform_device *pdev,
+ struct nbu2ss_udc *udc)
+{
+ spin_lock_init(&udc->lock);
+ udc->dev = &pdev->dev;
+
+ udc->gadget.is_selfpowered = 1;
+ udc->devstate = USB_STATE_NOTATTACHED;
+ udc->pdev = pdev;
+ udc->mA = 0;
+
+ udc->pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
+ /* init Endpoint */
+ nbu2ss_drv_ep_init(udc);
+
+ /* init Gadget */
+ udc->gadget.ops = &nbu2ss_gadget_ops;
+ udc->gadget.ep0 = &udc->ep[0].ep;
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->gadget.name = driver_name;
+ /* udc->gadget.is_dualspeed = 1; */
+
+ device_initialize(&udc->gadget.dev);
+
+ dev_set_name(&udc->gadget.dev, "gadget");
+ udc->gadget.dev.parent = &pdev->dev;
+ udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
+
+ return 0;
+}
+
+/*
+ * probe - binds to the platform device
+ */
+static int nbu2ss_drv_probe(struct platform_device *pdev)
+{
+ int status = -ENODEV;
+ struct nbu2ss_udc *udc;
+ struct resource *r;
+ int irq;
+ void __iomem *mmio_base;
+
+ udc = &udc_controller;
+ memset(udc, 0, sizeof(struct nbu2ss_udc));
+
+ platform_set_drvdata(pdev, udc);
+
+ /* require I/O memory and IRQ to be provided as resources */
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mmio_base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(mmio_base))
+ return PTR_ERR(mmio_base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ\n");
+ return irq;
+ }
+ status = devm_request_irq(&pdev->dev, irq, _nbu2ss_udc_irq,
+ 0, driver_name, udc);
+
+ /* IO Memory */
+ udc->p_regs = (struct fc_regs *)mmio_base;
+
+ /* USB Function Controller Interrupt */
+ if (status != 0) {
+ dev_err(udc->dev, "request_irq(USB_UDC_IRQ_1) failed\n");
+ goto cleanup1;
+ }
+
+ /* Driver Initialization */
+ status = nbu2ss_drv_contest_init(pdev, udc);
+ if (status < 0) {
+ /* Error */
+ goto cleanup1;
+ }
+
+ /* VBUS Interrupt */
+ irq_set_irq_type(INT_VBUS, IRQ_TYPE_EDGE_BOTH);
+ status = request_irq(INT_VBUS,
+ _nbu2ss_vbus_irq,
+ IRQF_SHARED,
+ driver_name,
+ udc);
+
+ if (status != 0) {
+ dev_err(udc->dev, "request_irq(INT_VBUS) failed\n");
+ goto cleanup1;
+ }
+
+ return status;
+
+cleanup1:
+ return status;
+}
+
+/*-------------------------------------------------------------------------*/
+static void nbu2ss_drv_shutdown(struct platform_device *pdev)
+{
+ struct nbu2ss_udc *udc;
+
+ udc = platform_get_drvdata(pdev);
+ if (udc == NULL)
+ return;
+
+ _nbu2ss_disable_controller(udc);
+}
+
+/*-------------------------------------------------------------------------*/
+static int __exit nbu2ss_drv_remove(struct platform_device *pdev)
+{
+ struct nbu2ss_udc *udc;
+ struct nbu2ss_ep *ep;
+ int i;
+
+ udc = &udc_controller;
+
+ for (i = 0; i < NUM_ENDPOINTS; i++) {
+ ep = &udc->ep[i];
+ if (ep->virt_buf)
+ dma_free_coherent(NULL, PAGE_SIZE,
+ (void *)ep->virt_buf, ep->phys_buf);
+ }
+
+ /* Interrupt Handler - Release */
+ free_irq(INT_VBUS, udc);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_drv_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct nbu2ss_udc *udc;
+
+ udc = platform_get_drvdata(pdev);
+ if (udc == NULL)
+ return 0;
+
+ if (udc->vbus_active) {
+ udc->vbus_active = 0;
+ udc->devstate = USB_STATE_NOTATTACHED;
+ udc->linux_suspended = 1;
+
+ if (udc->usb_suspended) {
+ udc->usb_suspended = 0;
+ _nbu2ss_reset_controller(udc);
+ }
+
+ _nbu2ss_quiesce(udc);
+ }
+ _nbu2ss_disable_controller(udc);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static int nbu2ss_drv_resume(struct platform_device *pdev)
+{
+ u32 data;
+ struct nbu2ss_udc *udc;
+
+ udc = platform_get_drvdata(pdev);
+ if (udc == NULL)
+ return 0;
+
+ data = gpio_get_value(VBUS_VALUE);
+ if (data) {
+ udc->vbus_active = 1;
+ udc->devstate = USB_STATE_POWERED;
+ _nbu2ss_enable_controller(udc);
+ _nbu2ss_pullup(udc, 1);
+ }
+
+ udc->linux_suspended = 0;
+
+ return 0;
+}
+
+
+static struct platform_driver udc_driver = {
+ .probe = nbu2ss_drv_probe,
+ .shutdown = nbu2ss_drv_shutdown,
+ .remove = __exit_p(nbu2ss_drv_remove),
+ .suspend = nbu2ss_drv_suspend,
+ .resume = nbu2ss_drv_resume,
+ .driver = {
+ .name = driver_name,
+ },
+};
+
+module_platform_driver(udc_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Renesas Electronics Corporation");
+MODULE_LICENSE("GPL");
+
+
Code Review / kvmfornfv.git / blobdiff