diff options
Diffstat (limited to 'drivers/usb/gadget/fsl_qe_udc.c')
| -rw-r--r-- | drivers/usb/gadget/fsl_qe_udc.c | 2723 |
1 files changed, 2723 insertions, 0 deletions
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c new file mode 100644 index 00000000000..e9400e62f17 --- /dev/null +++ b/drivers/usb/gadget/fsl_qe_udc.c @@ -0,0 +1,2723 @@ +/* + * driver/usb/gadget/fsl_qe_udc.c + * + * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved. + * + * Xie Xiaobo <X.Xie@freescale.com> + * Li Yang <leoli@freescale.com> + * Based on bareboard code from Shlomi Gridish. + * + * Description: + * Freescle QE/CPM USB Pheripheral Controller Driver + * The controller can be found on MPC8360, MPC8272, and etc. + * MPC8360 Rev 1.1 may need QE mircocode update + * + * 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 USB_TRACE + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/moduleparam.h> +#include <linux/of_platform.h> +#include <linux/dma-mapping.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> +#include <asm/qe.h> +#include <asm/cpm.h> +#include <asm/dma.h> +#include <asm/reg.h> +#include "fsl_qe_udc.h" + +#define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver" +#define DRIVER_AUTHOR "Xie XiaoBo" +#define DRIVER_VERSION "1.0" + +#define DMA_ADDR_INVALID (~(dma_addr_t)0) + +static const char driver_name[] = "fsl_qe_udc"; +static const char driver_desc[] = DRIVER_DESC; + +/*ep name is important in gadget, it should obey the convention of ep_match()*/ +static const char *const ep_name[] = { + "ep0-control", /* everyone has ep0 */ + /* 3 configurable endpoints */ + "ep1", + "ep2", + "ep3", +}; + +static struct usb_endpoint_descriptor qe_ep0_desc = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + + .bEndpointAddress = 0, + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, + .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD, +}; + +/* it is initialized in probe() */ +static struct qe_udc *udc_controller; + +/******************************************************************** + * Internal Used Function Start +********************************************************************/ +/*----------------------------------------------------------------- + * done() - retire a request; caller blocked irqs + *--------------------------------------------------------------*/ +static void done(struct qe_ep *ep, struct qe_req *req, int status) +{ + struct qe_udc *udc = ep->udc; + unsigned char stopped = ep->stopped; + + /* the req->queue pointer is used by ep_queue() func, in which + * the request will be added into a udc_ep->queue 'd tail + * so here the req will be dropped from the 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; + + if (req->mapped) { + dma_unmap_single(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(udc->gadget.dev.parent, + req->req.dma, req->req.length, + ep_is_in(ep) + ? DMA_TO_DEVICE + : DMA_FROM_DEVICE); + + if (status && (status != -ESHUTDOWN)) + dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n", + ep->ep.name, &req->req, status, + req->req.actual, req->req.length); + + /* don't modify queue heads during completion callback */ + ep->stopped = 1; + spin_unlock(&udc->lock); + + /* this complete() should a func implemented by gadget layer, + * eg fsg->bulk_in_complete() */ + if (req->req.complete) + req->req.complete(&ep->ep, &req->req); + + spin_lock(&udc->lock); + + ep->stopped = stopped; +} + +/*----------------------------------------------------------------- + * nuke(): delete all requests related to this ep + *--------------------------------------------------------------*/ +static void nuke(struct qe_ep *ep, int status) +{ + /* Whether this eq has request linked */ + while (!list_empty(&ep->queue)) { + struct qe_req *req = NULL; + req = list_entry(ep->queue.next, struct qe_req, queue); + + done(ep, req, status); + } +} + +/*---------------------------------------------------------------------------* + * USB and Endpoint manipulate process, include parameter and register * + *---------------------------------------------------------------------------*/ +/* @value: 1--set stall 0--clean stall */ +static int qe_eprx_stall_change(struct qe_ep *ep, int value) +{ + u16 tem_usep; + u8 epnum = ep->epnum; + struct qe_udc *udc = ep->udc; + + tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); + tem_usep = tem_usep & ~USB_RHS_MASK; + if (value == 1) + tem_usep |= USB_RHS_STALL; + else if (ep->dir == USB_DIR_IN) + tem_usep |= USB_RHS_IGNORE_OUT; + + out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); + return 0; +} + +static int qe_eptx_stall_change(struct qe_ep *ep, int value) +{ + u16 tem_usep; + u8 epnum = ep->epnum; + struct qe_udc *udc = ep->udc; + + tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); + tem_usep = tem_usep & ~USB_THS_MASK; + if (value == 1) + tem_usep |= USB_THS_STALL; + else if (ep->dir == USB_DIR_OUT) + tem_usep |= USB_THS_IGNORE_IN; + + out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); + + return 0; +} + +static int qe_ep0_stall(struct qe_udc *udc) +{ + qe_eptx_stall_change(&udc->eps[0], 1); + qe_eprx_stall_change(&udc->eps[0], 1); + udc_controller->ep0_state = WAIT_FOR_SETUP; + udc_controller->ep0_dir = 0; + return 0; +} + +static int qe_eprx_nack(struct qe_ep *ep) +{ + u8 epnum = ep->epnum; + struct qe_udc *udc = ep->udc; + + if (ep->state == EP_STATE_IDLE) { + /* Set the ep's nack */ + clrsetbits_be16(&udc->usb_regs->usb_usep[epnum], + USB_RHS_MASK, USB_RHS_NACK); + + /* Mask Rx and Busy interrupts */ + clrbits16(&udc->usb_regs->usb_usbmr, + (USB_E_RXB_MASK | USB_E_BSY_MASK)); + + ep->state = EP_STATE_NACK; + } + return 0; +} + +static int qe_eprx_normal(struct qe_ep *ep) +{ + struct qe_udc *udc = ep->udc; + + if (ep->state == EP_STATE_NACK) { + clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum], + USB_RTHS_MASK, USB_THS_IGNORE_IN); + + /* Unmask RX interrupts */ + out_be16(&udc->usb_regs->usb_usber, + USB_E_BSY_MASK | USB_E_RXB_MASK); + setbits16(&udc->usb_regs->usb_usbmr, + (USB_E_RXB_MASK | USB_E_BSY_MASK)); + + ep->state = EP_STATE_IDLE; + ep->has_data = 0; + } + + return 0; +} + +static int qe_ep_cmd_stoptx(struct qe_ep *ep) +{ + if (ep->udc->soc_type == PORT_CPM) + cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT), + CPM_USB_STOP_TX_OPCODE); + else + qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, + ep->epnum, 0); + + return 0; +} + +static int qe_ep_cmd_restarttx(struct qe_ep *ep) +{ + if (ep->udc->soc_type == PORT_CPM) + cpm_command(CPM_USB_RESTART_TX | (ep->epnum << + CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE); + else + qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, + ep->epnum, 0); + + return 0; +} + +static int qe_ep_flushtxfifo(struct qe_ep *ep) +{ + struct qe_udc *udc = ep->udc; + int i; + + i = (int)ep->epnum; + + qe_ep_cmd_stoptx(ep); + out_8(&udc->usb_regs->usb_uscom, + USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); + out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase)); + out_be32(&udc->ep_param[i]->tstate, 0); + out_be16(&udc->ep_param[i]->tbcnt, 0); + + ep->c_txbd = ep->txbase; + ep->n_txbd = ep->txbase; + qe_ep_cmd_restarttx(ep); + return 0; +} + +static int qe_ep_filltxfifo(struct qe_ep *ep) +{ + struct qe_udc *udc = ep->udc; + + out_8(&udc->usb_regs->usb_uscom, + USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); + return 0; +} + +static int qe_epbds_reset(struct qe_udc *udc, int pipe_num) +{ + struct qe_ep *ep; + u32 bdring_len; + struct qe_bd __iomem *bd; + int i; + + ep = &udc->eps[pipe_num]; + + if (ep->dir == USB_DIR_OUT) + bdring_len = USB_BDRING_LEN_RX; + else + bdring_len = USB_BDRING_LEN; + + bd = ep->rxbase; + for (i = 0; i < (bdring_len - 1); i++) { + out_be32((u32 __iomem *)bd, R_E | R_I); + bd++; + } + out_be32((u32 __iomem *)bd, R_E | R_I | R_W); + + bd = ep->txbase; + for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { + out_be32(&bd->buf, 0); + out_be32((u32 __iomem *)bd, 0); + bd++; + } + out_be32((u32 __iomem *)bd, T_W); + + return 0; +} + +static int qe_ep_reset(struct qe_udc *udc, int pipe_num) +{ + struct qe_ep *ep; + u16 tmpusep; + + ep = &udc->eps[pipe_num]; + tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]); + tmpusep &= ~USB_RTHS_MASK; + + switch (ep->dir) { + case USB_DIR_BOTH: + qe_ep_flushtxfifo(ep); + break; + case USB_DIR_OUT: + tmpusep |= USB_THS_IGNORE_IN; + break; + case USB_DIR_IN: + qe_ep_flushtxfifo(ep); + tmpusep |= USB_RHS_IGNORE_OUT; + break; + default: + break; + } + out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep); + + qe_epbds_reset(udc, pipe_num); + + return 0; +} + +static int qe_ep_toggledata01(struct qe_ep *ep) +{ + ep->data01 ^= 0x1; + return 0; +} + +static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num) +{ + struct qe_ep *ep = &udc->eps[pipe_num]; + unsigned long tmp_addr = 0; + struct usb_ep_para __iomem *epparam; + int i; + struct qe_bd __iomem *bd; + int bdring_len; + + if (ep->dir == USB_DIR_OUT) + bdring_len = USB_BDRING_LEN_RX; + else + bdring_len = USB_BDRING_LEN; + + epparam = udc->ep_param[pipe_num]; + /* alloc multi-ram for BD rings and set the ep parameters */ + tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len + + USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD); + out_be16(&epparam->rbase, (u16)tmp_addr); + out_be16(&epparam->tbase, (u16)(tmp_addr + + (sizeof(struct qe_bd) * bdring_len))); + + out_be16(&epparam->rbptr, in_be16(&epparam->rbase)); + out_be16(&epparam->tbptr, in_be16(&epparam->tbase)); + + ep->rxbase = cpm_muram_addr(tmp_addr); + ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd) + * bdring_len)); + ep->n_rxbd = ep->rxbase; + ep->e_rxbd = ep->rxbase; + ep->n_txbd = ep->txbase; + ep->c_txbd = ep->txbase; + ep->data01 = 0; /* data0 */ + + /* Init TX and RX bds */ + bd = ep->rxbase; + for (i = 0; i < bdring_len - 1; i++) { + out_be32(&bd->buf, 0); + out_be32((u32 __iomem *)bd, 0); + bd++; + } + out_be32(&bd->buf, 0); + out_be32((u32 __iomem *)bd, R_W); + + bd = ep->txbase; + for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { + out_be32(&bd->buf, 0); + out_be32((u32 __iomem *)bd, 0); + bd++; + } + out_be32(&bd->buf, 0); + out_be32((u32 __iomem *)bd, T_W); + + return 0; +} + +static int qe_ep_rxbd_update(struct qe_ep *ep) +{ + unsigned int size; + int i; + unsigned int tmp; + struct qe_bd __iomem *bd; + unsigned int bdring_len; + + if (ep->rxbase == NULL) + return -EINVAL; + + bd = ep->rxbase; + + ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC); + if (ep->rxframe == NULL) { + dev_err(ep->udc->dev, "malloc rxframe failed\n"); + return -ENOMEM; + } + + qe_frame_init(ep->rxframe); + + if (ep->dir == USB_DIR_OUT) + bdring_len = USB_BDRING_LEN_RX; + else + bdring_len = USB_BDRING_LEN; + + size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1); + ep->rxbuffer = kzalloc(size, GFP_ATOMIC); + if (ep->rxbuffer == NULL) { + dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n", + size); + kfree(ep->rxframe); + return -ENOMEM; + } + + ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer); + if (ep->rxbuf_d == DMA_ADDR_INVALID) { + ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent, + ep->rxbuffer, + size, + DMA_FROM_DEVICE); + ep->rxbufmap = 1; + } else { + dma_sync_single_for_device(udc_controller->gadget.dev.parent, + ep->rxbuf_d, size, + DMA_FROM_DEVICE); + ep->rxbufmap = 0; + } + + size = ep->ep.maxpacket + USB_CRC_SIZE + 2; + tmp = ep->rxbuf_d; + tmp = (u32)(((tmp >> 2) << 2) + 4); + + for (i = 0; i < bdring_len - 1; i++) { + out_be32(&bd->buf, tmp); + out_be32((u32 __iomem *)bd, (R_E | R_I)); + tmp = tmp + size; + bd++; + } + out_be32(&bd->buf, tmp); + out_be32((u32 __iomem *)bd, (R_E | R_I | R_W)); + + return 0; +} + +static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num) +{ + struct qe_ep *ep = &udc->eps[pipe_num]; + struct usb_ep_para __iomem *epparam; + u16 usep, logepnum; + u16 tmp; + u8 rtfcr = 0; + + epparam = udc->ep_param[pipe_num]; + + usep = 0; + logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + usep |= (logepnum << USB_EPNUM_SHIFT); + + switch (ep->desc->bmAttributes & 0x03) { + case USB_ENDPOINT_XFER_BULK: + usep |= USB_TRANS_BULK; + break; + case USB_ENDPOINT_XFER_ISOC: + usep |= USB_TRANS_ISO; + break; + case USB_ENDPOINT_XFER_INT: + usep |= USB_TRANS_INT; + break; + default: + usep |= USB_TRANS_CTR; + break; + } + + switch (ep->dir) { + case USB_DIR_OUT: + usep |= USB_THS_IGNORE_IN; + break; + case USB_DIR_IN: + usep |= USB_RHS_IGNORE_OUT; + break; + default: + break; + } + out_be16(&udc->usb_regs->usb_usep[pipe_num], usep); + + rtfcr = 0x30; + out_8(&epparam->rbmr, rtfcr); + out_8(&epparam->tbmr, rtfcr); + + tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE); + /* MRBLR must be divisble by 4 */ + tmp = (u16)(((tmp >> 2) << 2) + 4); + out_be16(&epparam->mrblr, tmp); + + return 0; +} + +static int qe_ep_init(struct qe_udc *udc, + unsigned char pipe_num, + const struct usb_endpoint_descriptor *desc) +{ + struct qe_ep *ep = &udc->eps[pipe_num]; + unsigned long flags; + int reval = 0; + u16 max = 0; + + max = le16_to_cpu(desc->wMaxPacketSize); + + /* check the max package size validate for this endpoint */ + /* Refer to USB2.0 spec table 9-13, + */ + if (pipe_num != 0) { + switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { + case USB_ENDPOINT_XFER_BULK: + if (strstr(ep->ep.name, "-iso") + || strstr(ep->ep.name, "-int")) + goto en_done; + switch (udc->gadget.speed) { + case USB_SPEED_HIGH: + if ((max == 128) || (max == 256) || (max == 512)) + break; + default: + switch (max) { + case 4: + case 8: + case 16: + case 32: + case 64: + break; + default: + case USB_SPEED_LOW: + goto en_done; + } + } + break; + case USB_ENDPOINT_XFER_INT: + if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ + goto en_done; + switch (udc->gadget.speed) { + case USB_SPEED_HIGH: + if (max <= 1024) + break; + case USB_SPEED_FULL: + if (max <= 64) + break; + default: + if (max <= 8) + break; + goto en_done; + } + break; + case USB_ENDPOINT_XFER_ISOC: + if (strstr(ep->ep.name, "-bulk") + || strstr(ep->ep.name, "-int")) + goto en_done; + switch (udc->gadget.speed) { + case USB_SPEED_HIGH: + if (max <= 1024) + break; + case USB_SPEED_FULL: + if (max <= 1023) + break; + default: + goto en_done; + } + break; + case USB_ENDPOINT_XFER_CONTROL: + if (strstr(ep->ep.name, "-iso") + || strstr(ep->ep.name, "-int")) + goto en_done; + switch (udc->gadget.speed) { + case USB_SPEED_HIGH: + case USB_SPEED_FULL: + switch (max) { + case 1: + case 2: + case 4: + case 8: + case 16: + case 32: + case 64: + break; + default: + goto en_done; + } + case USB_SPEED_LOW: + switch (max) { + case 1: + case 2: + case 4: + case 8: + break; + default: + goto en_done; + } + default: + goto en_done; + } + break; + + default: + goto en_done; + } + } /* if ep0*/ + + spin_lock_irqsave(&udc->lock, flags); + + /* initialize ep structure */ + ep->ep.maxpacket = max; + ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); + ep->desc = desc; + ep->stopped = 0; + ep->init = 1; + + if (pipe_num == 0) { + ep->dir = USB_DIR_BOTH; + udc->ep0_dir = USB_DIR_OUT; + udc->ep0_state = WAIT_FOR_SETUP; + } else { + switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) { + case USB_DIR_OUT: + ep->dir = USB_DIR_OUT; + break; + case USB_DIR_IN: + ep->dir = USB_DIR_IN; + default: + break; + } + } + + /* hardware special operation */ + qe_ep_bd_init(udc, pipe_num); + if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) { + reval = qe_ep_rxbd_update(ep); + if (reval) + goto en_done1; + } + + if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) { + ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC); + if (ep->txframe == NULL) { + dev_err(udc->dev, "malloc txframe failed\n"); + goto en_done2; + } + qe_frame_init(ep->txframe); + } + + qe_ep_register_init(udc, pipe_num); + + /* Now HW will be NAKing transfers to that EP, + * until a buffer is queued to it. */ + spin_unlock_irqrestore(&udc->lock, flags); + + return 0; +en_done2: + kfree(ep->rxbuffer); + kfree(ep->rxframe); +en_done1: + spin_unlock_irqrestore(&udc->lock, flags); +en_done: + dev_dbg(udc->dev, "failed to initialize %s\n", ep->ep.name); + return -ENODEV; +} + +static inline void qe_usb_enable(void) +{ + setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN); +} + +static inline void qe_usb_disable(void) +{ + clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN); +} + +/*----------------------------------------------------------------------------* + * USB and EP basic manipulate function end * + *----------------------------------------------------------------------------*/ + + +/****************************************************************************** + UDC transmit and receive process + ******************************************************************************/ +static void recycle_one_rxbd(struct qe_ep *ep) +{ + u32 bdstatus; + + bdstatus = in_be32((u32 __iomem *)ep->e_rxbd); + bdstatus = R_I | R_E | (bdstatus & R_W); + out_be32((u32 __iomem *)ep->e_rxbd, bdstatus); + + if (bdstatus & R_W) + ep->e_rxbd = ep->rxbase; + else + ep->e_rxbd++; +} + +static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext) +{ + u32 bdstatus; + struct qe_bd __iomem *bd, *nextbd; + unsigned char stop = 0; + + nextbd = ep->n_rxbd; + bd = ep->e_rxbd; + bdstatus = in_be32((u32 __iomem *)bd); + + while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) { + bdstatus = R_E | R_I | (bdstatus & R_W); + out_be32((u32 __iomem *)bd, bdstatus); + + if (bdstatus & R_W) + bd = ep->rxbase; + else + bd++; + + bdstatus = in_be32((u32 __iomem *)bd); + if (stopatnext && (bd == nextbd)) + stop = 1; + } + + ep->e_rxbd = bd; +} + +static void ep_recycle_rxbds(struct qe_ep *ep) +{ + struct qe_bd __iomem *bd = ep->n_rxbd; + u32 bdstatus; + u8 epnum = ep->epnum; + struct qe_udc *udc = ep->udc; + + bdstatus = in_be32((u32 __iomem *)bd); + if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) { + bd = ep->rxbase + + ((in_be16(&udc->ep_param[epnum]->rbptr) - + in_be16(&udc->ep_param[epnum]->rbase)) + >> 3); + bdstatus = in_be32((u32 __iomem *)bd); + + if (bdstatus & R_W) + bd = ep->rxbase; + else + bd++; + + ep->e_rxbd = bd; + recycle_rxbds(ep, 0); + ep->e_rxbd = ep->n_rxbd; + } else + recycle_rxbds(ep, 1); + + if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK) + out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK); + + if (ep->has_data <= 0 && (!list_empty(&ep->queue))) + qe_eprx_normal(ep); + + ep->localnack = 0; +} + +static void setup_received_handle(struct qe_udc *udc, + struct usb_ctrlrequest *setup); +static int qe_ep_rxframe_handle(struct qe_ep *ep); +static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req); +/* when BD PID is setup, handle the packet */ +static int ep0_setup_handle(struct qe_udc *udc) +{ + struct qe_ep *ep = &udc->eps[0]; + struct qe_frame *pframe; + unsigned int fsize; + u8 *cp; + + pframe = ep->rxframe; + if ((frame_get_info(pframe) & PID_SETUP) + && (udc->ep0_state == WAIT_FOR_SETUP)) { + fsize = frame_get_length(pframe); + if (unlikely(fsize != 8)) + return -EINVAL; + cp = (u8 *)&udc->local_setup_buff; + memcpy(cp, pframe->data, fsize); + ep->data01 = 1; + + /* handle the usb command base on the usb_ctrlrequest */ + setup_received_handle(udc, &udc->local_setup_buff); + return 0; + } + return -EINVAL; +} + +static int qe_ep0_rx(struct qe_udc *udc) +{ + struct qe_ep *ep = &udc->eps[0]; + struct qe_frame *pframe; + struct qe_bd __iomem *bd; + u32 bdstatus, length; + u32 vaddr; + + pframe = ep->rxframe; + + if (ep->dir == USB_DIR_IN) { + dev_err(udc->dev, "ep0 not a control endpoint\n"); + return -EINVAL; + } + + bd = ep->n_rxbd; + bdstatus = in_be32((u32 __iomem *)bd); + length = bdstatus & BD_LENGTH_MASK; + + while (!(bdstatus & R_E) && length) { + if ((bdstatus & R_F) && (bdstatus & R_L) + && !(bdstatus & R_ERROR)) { + if (length == USB_CRC_SIZE) { + udc->ep0_state = WAIT_FOR_SETUP; + dev_vdbg(udc->dev, + "receive a ZLP in status phase\n"); + } else { + qe_frame_clean(pframe); + vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); + frame_set_data(pframe, (u8 *)vaddr); + frame_set_length(pframe, + (length - USB_CRC_SIZE)); + frame_set_status(pframe, FRAME_OK); + switch (bdstatus & R_PID) { + case R_PID_SETUP: + frame_set_info(pframe, PID_SETUP); + break; + case R_PID_DATA1: + frame_set_info(pframe, PID_DATA1); + break; + default: + frame_set_info(pframe, PID_DATA0); + break; + } + + if ((bdstatus & R_PID) == R_PID_SETUP) + ep0_setup_handle(udc); + else + qe_ep_rxframe_handle(ep); + } + } else { + dev_err(udc->dev, "The receive frame with error!\n"); + } + + /* note: don't clear the rxbd's buffer address */ + recycle_one_rxbd(ep); + + /* Get next BD */ + if (bdstatus & R_W) + bd = ep->rxbase; + else + bd++; + + bdstatus = in_be32((u32 __iomem *)bd); + length = bdstatus & BD_LENGTH_MASK; + + } + + ep->n_rxbd = bd; + + return 0; +} + +static int qe_ep_rxframe_handle(struct qe_ep *ep) +{ + struct qe_frame *pframe; + u8 framepid = 0; + unsigned int fsize; + u8 *cp; + struct qe_req *req; + + pframe = ep->rxframe; + + if (frame_get_info(pframe) & PID_DATA1) + framepid = 0x1; + + if (framepid != ep->data01) { + dev_err(ep->udc->dev, "the data01 error!\n"); + return -EIO; + } + + fsize = frame_get_length(pframe); + if (list_empty(&ep->queue)) { + dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name); + } else { + req = list_entry(ep->queue.next, struct qe_req, queue); + + cp = (u8 *)(req->req.buf) + req->req.actual; + if (cp) { + memcpy(cp, pframe->data, fsize); + req->req.actual += fsize; + if ((fsize < ep->ep.maxpacket) || + (req->req.actual >= req->req.length)) { + if (ep->epnum == 0) + ep0_req_complete(ep->udc, req); + else + done(ep, req, 0); + if (list_empty(&ep->queue) && ep->epnum != 0) + qe_eprx_nack(ep); + } + } + } + + qe_ep_toggledata01(ep); + + return 0; +} + +static void ep_rx_tasklet(unsigned long data) +{ + struct qe_udc *udc = (struct qe_udc *)data; + struct qe_ep *ep; + struct qe_frame *pframe; + struct qe_bd __iomem *bd; + unsigned long flags; + u32 bdstatus, length; + u32 vaddr, i; + + spin_lock_irqsave(&udc->lock, flags); + + for (i = 1; i < USB_MAX_ENDPOINTS; i++) { + ep = &udc->eps[i]; + + if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) { + dev_dbg(udc->dev, + "This is a transmit ep or disable tasklet!\n"); + continue; + } + + pframe = ep->rxframe; + bd = ep->n_rxbd; + bdstatus = in_be32((u32 __iomem *)bd); + length = bdstatus & BD_LENGTH_MASK; + + while (!(bdstatus & R_E) && length) { + if (list_empty(&ep->queue)) { + qe_eprx_nack(ep); + dev_dbg(udc->dev, + "The rxep have noreq %d\n", + ep->has_data); + break; + } + + if ((bdstatus & R_F) && (bdstatus & R_L) + && !(bdstatus & R_ERROR)) { + qe_frame_clean(pframe); + vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); + frame_set_data(pframe, (u8 *)vaddr); + frame_set_length(pframe, + (length - USB_CRC_SIZE)); + frame_set_status(pframe, FRAME_OK); + switch (bdstatus & R_PID) { + case R_PID_DATA1: + frame_set_info(pframe, PID_DATA1); + break; + case R_PID_SETUP: + frame_set_info(pframe, PID_SETUP); + break; + default: + frame_set_info(pframe, PID_DATA0); + break; + } + /* handle the rx frame */ + qe_ep_rxframe_handle(ep); + } else { + dev_err(udc->dev, + "error in received frame\n"); + } + /* note: don't clear the rxbd's buffer address */ + /*clear the length */ + out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK); + ep->has_data--; + if (!(ep->localnack)) + recycle_one_rxbd(ep); + + /* Get next BD */ + if (bdstatus & R_W) + bd = ep->rxbase; + else + bd++; + + bdstatus = in_be32((u32 __iomem *)bd); + length = bdstatus & BD_LENGTH_MASK; + } + + ep->n_rxbd = bd; + + if (ep->localnack) + ep_recycle_rxbds(ep); + + ep->enable_tasklet = 0; + } /* for i=1 */ + + spin_unlock_irqrestore(&udc->lock, flags); +} + +static int qe_ep_rx(struct qe_ep *ep) +{ + struct qe_udc *udc; + struct qe_frame *pframe; + struct qe_bd __iomem *bd; + u16 swoffs, ucoffs, emptybds; + + udc = ep->udc; + pframe = ep->rxframe; + + if (ep->dir == USB_DIR_IN) { + dev_err(udc->dev, "transmit ep in rx function\n"); + return -EINVAL; + } + + bd = ep->n_rxbd; + + swoffs = (u16)(bd - ep->rxbase); + ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) - + in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3); + if (swoffs < ucoffs) + emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs; + else + emptybds = swoffs - ucoffs; + + if (emptybds < MIN_EMPTY_BDS) { + qe_eprx_nack(ep); + ep->localnack = 1; + dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds); + } + ep->has_data = USB_BDRING_LEN_RX - emptybds; + + if (list_empty(&ep->queue)) { + qe_eprx_nack(ep); + dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n", + ep->has_data); + return 0; + } + + tasklet_schedule(&udc->rx_tasklet); + ep->enable_tasklet = 1; + + return 0; +} + +/* send data from a frame, no matter what tx_req */ +static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame) +{ + struct qe_udc *udc = ep->udc; + struct qe_bd __iomem *bd; + u16 saveusbmr; + u32 bdstatus, pidmask; + u32 paddr; + + if (ep->dir == USB_DIR_OUT) { + dev_err(udc->dev, "receive ep passed to tx function\n"); + return -EINVAL; + } + + /* Disable the Tx interrupt */ + saveusbmr = in_be16(&udc->usb_regs->usb_usbmr); + out_be16(&udc->usb_regs->usb_usbmr, + saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK)); + + bd = ep->n_txbd; + bdstatus = in_be32((u32 __iomem *)bd); + + if (!(bdstatus & (T_R | BD_LENGTH_MASK))) { + if (frame_get_length(frame) == 0) { + frame_set_data(frame, udc->nullbuf); + frame_set_length(frame, 2); + frame->info |= (ZLP | NO_CRC); + dev_vdbg(udc->dev, "the frame size = 0\n"); + } + paddr = virt_to_phys((void *)frame->data); + out_be32(&bd->buf, paddr); + bdstatus = (bdstatus&T_W); + if (!(frame_get_info(frame) & NO_CRC)) + bdstatus |= T_R | T_I | T_L | T_TC + | frame_get_length(frame); + else + bdstatus |= T_R | T_I | T_L | frame_get_length(frame); + + /* if the packet is a ZLP in status phase */ + if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP)) + ep->data01 = 0x1; + + if (ep->data01) { + pidmask = T_PID_DATA1; + frame->info |= PID_DATA1; + } else { + pidmask = T_PID_DATA0; + frame->info |= PID_DATA0; + } + bdstatus |= T_CNF; + bdstatus |= pidmask; + out_be32((u32 __iomem *)bd, bdstatus); + qe_ep_filltxfifo(ep); + + /* enable the TX interrupt */ + out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); + + qe_ep_toggledata01(ep); + if (bdstatus & T_W) + ep->n_txbd = ep->txbase; + else + ep->n_txbd++; + + return 0; + } else { + out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); + dev_vdbg(udc->dev, "The tx bd is not ready!\n"); + return -EBUSY; + } +} + +/* when an bd was transmitted, the function can * + * handle the tx_req, not include ep0 */ +static int txcomplete(struct qe_ep *ep, unsigned char restart) +{ + if (ep->tx_req != NULL) { + if (!restart) { + int asent = ep->last; + ep->sent += asent; + ep->last -= asent; + } else { + ep->last = 0; + } + + /* a request already were transmitted completely */ + if ((ep->tx_req->req.length - ep->sent) <= 0) { + ep->tx_req->req.actual = (unsigned int)ep->sent; + done(ep, ep->tx_req, 0); + ep->tx_req = NULL; + ep->last = 0; + ep->sent = 0; + } + } + + /* we should gain a new tx_req fot this endpoint */ + if (ep->tx_req == NULL) { + if (!list_empty(&ep->queue)) { + ep->tx_req = list_entry(ep->queue.next, struct qe_req, + queue); + ep->last = 0; + ep->sent = 0; + } + } + + return 0; +} + +/* give a frame and a tx_req,send some data */ +static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame) +{ + unsigned int size; + u8 *buf; + + qe_frame_clean(frame); + size = min_t(u32, (ep->tx_req->req.length - ep->sent), + ep->ep.maxpacket); + buf = (u8 *)ep->tx_req->req.buf + ep->sent; + if (buf && size) { + ep->last = size; + frame_set_data(frame, buf); + frame_set_length(frame, size); + frame_set_status(frame, FRAME_OK); + frame_set_info(frame, 0); + return qe_ep_tx(ep, frame); + } + return -EIO; +} + +/* give a frame struct,send a ZLP */ +static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor) +{ + struct qe_udc *udc = ep->udc; + + if (frame == NULL) + return -ENODEV; + + qe_frame_clean(frame); + frame_set_data(frame, (u8 *)udc->nullbuf); + frame_set_length(frame, 2); + frame_set_status(frame, FRAME_OK); + frame_set_info(frame, (ZLP | NO_CRC | infor)); + + return qe_ep_tx(ep, frame); +} + +static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame) +{ + struct qe_req *req = ep->tx_req; + int reval; + + if (req == NULL) + return -ENODEV; + + if ((req->req.length - ep->sent) > 0) + reval = qe_usb_senddata(ep, frame); + else + reval = sendnulldata(ep, frame, 0); + + return reval; +} + +/* if direction is DIR_IN, the status is Device->Host + * if direction is DIR_OUT, the status transaction is Device<-Host + * in status phase, udc create a request and gain status */ +static int ep0_prime_status(struct qe_udc *udc, int direction) +{ + + struct qe_ep *ep = &udc->eps[0]; + + if (direction == USB_DIR_IN) { + udc->ep0_state = DATA_STATE_NEED_ZLP; + udc->ep0_dir = USB_DIR_IN; |