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linux/drivers/usb/gadget/mv_u3d_core.c
Felipe Balbi 65cd3f2b87 usb: gadget: mv_u3d_core: remove unused clock 
The origianl understanding of clock is wrong. The UDC controller
only have one clock input.
Passing clock name by pdata is wrong. The clock is defined by device
iteself.

Cc: Chao Xie <chao.xie@marvell.com>
Cc: Yu Xu <yuxu@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-04-02 11:42:47 +03:00

2080 lines
51 KiB
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/*
* Copyright (C) 2011 Marvell International Ltd. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/pm.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/platform_data/mv_usb.h>
#include <linux/clk.h>
#include "mv_u3d.h"
#define DRIVER_DESC "Marvell PXA USB3.0 Device Controller driver"
static const char driver_name[] = "mv_u3d";
static const char driver_desc[] = DRIVER_DESC;
static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status);
static void mv_u3d_stop_activity(struct mv_u3d *u3d,
struct usb_gadget_driver *driver);
/* for endpoint 0 operations */
static const struct usb_endpoint_descriptor mv_u3d_ep0_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0,
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
.wMaxPacketSize = MV_U3D_EP0_MAX_PKT_SIZE,
};
static void mv_u3d_ep0_reset(struct mv_u3d *u3d)
{
struct mv_u3d_ep *ep;
u32 epxcr;
int i;
for (i = 0; i < 2; i++) {
ep = &u3d->eps[i];
ep->u3d = u3d;
/* ep0 ep context, ep0 in and out share the same ep context */
ep->ep_context = &u3d->ep_context[1];
}
/* reset ep state machine */
/* reset ep0 out */
epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
epxcr |= MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
udelay(5);
epxcr &= ~MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
<< MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| MV_U3D_EPXCR_EP_TYPE_CONTROL);
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr1);
/* reset ep0 in */
epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
epxcr |= MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
udelay(5);
epxcr &= ~MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
<< MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| MV_U3D_EPXCR_EP_TYPE_CONTROL);
iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr1);
}
static void mv_u3d_ep0_stall(struct mv_u3d *u3d)
{
u32 tmp;
dev_dbg(u3d->dev, "%s\n", __func__);
/* set TX and RX to stall */
tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
tmp |= MV_U3D_EPXCR_EP_HALT;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
tmp |= MV_U3D_EPXCR_EP_HALT;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
/* update ep0 state */
u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
}
static int mv_u3d_process_ep_req(struct mv_u3d *u3d, int index,
struct mv_u3d_req *curr_req)
{
struct mv_u3d_trb *curr_trb;
dma_addr_t cur_deq_lo;
struct mv_u3d_ep_context *curr_ep_context;
int trb_complete, actual, remaining_length = 0;
int direction, ep_num;
int retval = 0;
u32 tmp, status, length;
curr_ep_context = &u3d->ep_context[index];
direction = index % 2;
ep_num = index / 2;
trb_complete = 0;
actual = curr_req->req.length;
while (!list_empty(&curr_req->trb_list)) {
curr_trb = list_entry(curr_req->trb_list.next,
struct mv_u3d_trb, trb_list);
if (!curr_trb->trb_hw->ctrl.own) {
dev_err(u3d->dev, "%s, TRB own error!\n",
u3d->eps[index].name);
return 1;
}
curr_trb->trb_hw->ctrl.own = 0;
if (direction == MV_U3D_EP_DIR_OUT) {
tmp = ioread32(&u3d->vuc_regs->rxst[ep_num].statuslo);
cur_deq_lo =
ioread32(&u3d->vuc_regs->rxst[ep_num].curdeqlo);
} else {
tmp = ioread32(&u3d->vuc_regs->txst[ep_num].statuslo);
cur_deq_lo =
ioread32(&u3d->vuc_regs->txst[ep_num].curdeqlo);
}
status = tmp >> MV_U3D_XFERSTATUS_COMPLETE_SHIFT;
length = tmp & MV_U3D_XFERSTATUS_TRB_LENGTH_MASK;
if (status == MV_U3D_COMPLETE_SUCCESS ||
(status == MV_U3D_COMPLETE_SHORT_PACKET &&
direction == MV_U3D_EP_DIR_OUT)) {
remaining_length += length;
actual -= remaining_length;
} else {
dev_err(u3d->dev,
"complete_tr error: ep=%d %s: error = 0x%x\n",
index >> 1, direction ? "SEND" : "RECV",
status);
retval = -EPROTO;
}
list_del_init(&curr_trb->trb_list);
}
if (retval)
return retval;
curr_req->req.actual = actual;
return 0;
}
/*
* mv_u3d_done() - retire a request; caller blocked irqs
* @status : request status to be set, only works when
* request is still in progress.
*/
static
void mv_u3d_done(struct mv_u3d_ep *ep, struct mv_u3d_req *req, int status)
__releases(&ep->udc->lock)
__acquires(&ep->udc->lock)
{
struct mv_u3d *u3d = (struct mv_u3d *)ep->u3d;
dev_dbg(u3d->dev, "mv_u3d_done: remove req->queue\n");
/* Removed the req from ep queue */
list_del_init(&req->queue);
/* req.status should be set as -EINPROGRESS in ep_queue() */
if (req->req.status == -EINPROGRESS)
req->req.status = status;
else
status = req->req.status;
/* Free trb for the request */
if (!req->chain)
dma_pool_free(u3d->trb_pool,
req->trb_head->trb_hw, req->trb_head->trb_dma);
else {
dma_unmap_single(ep->u3d->gadget.dev.parent,
(dma_addr_t)req->trb_head->trb_dma,
req->trb_count * sizeof(struct mv_u3d_trb_hw),
DMA_BIDIRECTIONAL);
kfree(req->trb_head->trb_hw);
}
kfree(req->trb_head);
usb_gadget_unmap_request(&u3d->gadget, &req->req, mv_u3d_ep_dir(ep));
if (status && (status != -ESHUTDOWN)) {
dev_dbg(u3d->dev, "complete %s req %p stat %d len %u/%u",
ep->ep.name, &req->req, status,
req->req.actual, req->req.length);
}
spin_unlock(&ep->u3d->lock);
/*
* complete() is from gadget layer,
* eg fsg->bulk_in_complete()
*/
if (req->req.complete)
req->req.complete(&ep->ep, &req->req);
spin_lock(&ep->u3d->lock);
}
static int mv_u3d_queue_trb(struct mv_u3d_ep *ep, struct mv_u3d_req *req)
{
u32 tmp, direction;
struct mv_u3d *u3d;
struct mv_u3d_ep_context *ep_context;
int retval = 0;
u3d = ep->u3d;
direction = mv_u3d_ep_dir(ep);
/* ep0 in and out share the same ep context slot 1*/
if (ep->ep_num == 0)
ep_context = &(u3d->ep_context[1]);
else
ep_context = &(u3d->ep_context[ep->ep_num * 2 + direction]);
/* check if the pipe is empty or not */
if (!list_empty(&ep->queue)) {
dev_err(u3d->dev, "add trb to non-empty queue!\n");
retval = -ENOMEM;
WARN_ON(1);
} else {
ep_context->rsvd0 = cpu_to_le32(1);
ep_context->rsvd1 = 0;
/* Configure the trb address and set the DCS bit.
* Both DCS bit and own bit in trb should be set.
*/
ep_context->trb_addr_lo =
cpu_to_le32(req->trb_head->trb_dma | DCS_ENABLE);
ep_context->trb_addr_hi = 0;
/* Ensure that updates to the EP Context will
* occure before Ring Bell.
*/
wmb();
/* ring bell the ep */
if (ep->ep_num == 0)
tmp = 0x1;
else
tmp = ep->ep_num * 2
+ ((direction == MV_U3D_EP_DIR_OUT) ? 0 : 1);
iowrite32(tmp, &u3d->op_regs->doorbell);
}
return retval;
}
static struct mv_u3d_trb *mv_u3d_build_trb_one(struct mv_u3d_req *req,
unsigned *length, dma_addr_t *dma)
{
u32 temp;
unsigned int direction;
struct mv_u3d_trb *trb;
struct mv_u3d_trb_hw *trb_hw;
struct mv_u3d *u3d;
/* how big will this transfer be? */
*length = req->req.length - req->req.actual;
BUG_ON(*length > (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
u3d = req->ep->u3d;
trb = kzalloc(sizeof(*trb), GFP_ATOMIC);
if (!trb) {
dev_err(u3d->dev, "%s, trb alloc fail\n", __func__);
return NULL;
}
/*
* Be careful that no _GFP_HIGHMEM is set,
* or we can not use dma_to_virt
* cannot use GFP_KERNEL in spin lock
*/
trb_hw = dma_pool_alloc(u3d->trb_pool, GFP_ATOMIC, dma);
if (!trb_hw) {
dev_err(u3d->dev,
"%s, dma_pool_alloc fail\n", __func__);
return NULL;
}
trb->trb_dma = *dma;
trb->trb_hw = trb_hw;
/* initialize buffer page pointers */
temp = (u32)(req->req.dma + req->req.actual);
trb_hw->buf_addr_lo = cpu_to_le32(temp);
trb_hw->buf_addr_hi = 0;
trb_hw->trb_len = cpu_to_le32(*length);
trb_hw->ctrl.own = 1;
if (req->ep->ep_num == 0)
trb_hw->ctrl.type = TYPE_DATA;
else
trb_hw->ctrl.type = TYPE_NORMAL;
req->req.actual += *length;
direction = mv_u3d_ep_dir(req->ep);
if (direction == MV_U3D_EP_DIR_IN)
trb_hw->ctrl.dir = 1;
else
trb_hw->ctrl.dir = 0;
/* Enable interrupt for the last trb of a request */
if (!req->req.no_interrupt)
trb_hw->ctrl.ioc = 1;
trb_hw->ctrl.chain = 0;
wmb();
return trb;
}
static int mv_u3d_build_trb_chain(struct mv_u3d_req *req, unsigned *length,
struct mv_u3d_trb *trb, int *is_last)
{
u32 temp;
unsigned int direction;
struct mv_u3d *u3d;
/* how big will this transfer be? */
*length = min(req->req.length - req->req.actual,
(unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
u3d = req->ep->u3d;
trb->trb_dma = 0;
/* initialize buffer page pointers */
temp = (u32)(req->req.dma + req->req.actual);
trb->trb_hw->buf_addr_lo = cpu_to_le32(temp);
trb->trb_hw->buf_addr_hi = 0;
trb->trb_hw->trb_len = cpu_to_le32(*length);
trb->trb_hw->ctrl.own = 1;
if (req->ep->ep_num == 0)
trb->trb_hw->ctrl.type = TYPE_DATA;
else
trb->trb_hw->ctrl.type = TYPE_NORMAL;
req->req.actual += *length;
direction = mv_u3d_ep_dir(req->ep);
if (direction == MV_U3D_EP_DIR_IN)
trb->trb_hw->ctrl.dir = 1;
else
trb->trb_hw->ctrl.dir = 0;
/* zlp is needed if req->req.zero is set */
if (req->req.zero) {
if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
*is_last = 1;
else
*is_last = 0;
} else if (req->req.length == req->req.actual)
*is_last = 1;
else
*is_last = 0;
/* Enable interrupt for the last trb of a request */
if (*is_last && !req->req.no_interrupt)
trb->trb_hw->ctrl.ioc = 1;
if (*is_last)
trb->trb_hw->ctrl.chain = 0;
else {
trb->trb_hw->ctrl.chain = 1;
dev_dbg(u3d->dev, "chain trb\n");
}
wmb();
return 0;
}
/* generate TRB linked list for a request
* usb controller only supports continous trb chain,
* that trb structure physical address should be continous.
*/
static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
{
unsigned count;
int is_last;
struct mv_u3d_trb *trb;
struct mv_u3d_trb_hw *trb_hw;
struct mv_u3d *u3d;
dma_addr_t dma;
unsigned length;
unsigned trb_num;
u3d = req->ep->u3d;
INIT_LIST_HEAD(&req->trb_list);
length = req->req.length - req->req.actual;
/* normally the request transfer length is less than 16KB.
* we use buil_trb_one() to optimize it.
*/
if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) {
trb = mv_u3d_build_trb_one(req, &count, &dma);
list_add_tail(&trb->trb_list, &req->trb_list);
req->trb_head = trb;
req->trb_count = 1;
req->chain = 0;
} else {
trb_num = length / MV_U3D_EP_MAX_LENGTH_TRANSFER;
if (length % MV_U3D_EP_MAX_LENGTH_TRANSFER)
trb_num++;
trb = kcalloc(trb_num, sizeof(*trb), GFP_ATOMIC);
if (!trb) {
dev_err(u3d->dev,
"%s, trb alloc fail\n", __func__);
return -ENOMEM;
}
trb_hw = kcalloc(trb_num, sizeof(*trb_hw), GFP_ATOMIC);
if (!trb_hw) {
dev_err(u3d->dev,
"%s, trb_hw alloc fail\n", __func__);
return -ENOMEM;
}
do {
trb->trb_hw = trb_hw;
if (mv_u3d_build_trb_chain(req, &count,
trb, &is_last)) {
dev_err(u3d->dev,
"%s, mv_u3d_build_trb_chain fail\n",
__func__);
return -EIO;
}
list_add_tail(&trb->trb_list, &req->trb_list);
req->trb_count++;
trb++;
trb_hw++;
} while (!is_last);
req->trb_head = list_entry(req->trb_list.next,
struct mv_u3d_trb, trb_list);
req->trb_head->trb_dma = dma_map_single(u3d->gadget.dev.parent,
req->trb_head->trb_hw,
trb_num * sizeof(*trb_hw),
DMA_BIDIRECTIONAL);
req->chain = 1;
}
return 0;
}
static int
mv_u3d_start_queue(struct mv_u3d_ep *ep)
{
struct mv_u3d *u3d = ep->u3d;
struct mv_u3d_req *req;
int ret;
if (!list_empty(&ep->req_list) && !ep->processing)
req = list_entry(ep->req_list.next, struct mv_u3d_req, list);
else
return 0;
ep->processing = 1;
/* set up dma mapping */
ret = usb_gadget_map_request(&u3d->gadget, &req->req,
mv_u3d_ep_dir(ep));
if (ret)
return ret;
req->req.status = -EINPROGRESS;
req->req.actual = 0;
req->trb_count = 0;
/* build trbs and push them to device queue */
if (!mv_u3d_req_to_trb(req)) {
ret = mv_u3d_queue_trb(ep, req);
if (ret) {
ep->processing = 0;
return ret;
}
} else {
ep->processing = 0;
dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__);
return -ENOMEM;
}
/* irq handler advances the queue */
if (req)
list_add_tail(&req->queue, &ep->queue);
return 0;
}
static int mv_u3d_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct mv_u3d *u3d;
struct mv_u3d_ep *ep;
struct mv_u3d_ep_context *ep_context;
u16 max = 0;
unsigned maxburst = 0;
u32 epxcr, direction;
if (!_ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT)
return -EINVAL;
ep = container_of(_ep, struct mv_u3d_ep, ep);
u3d = ep->u3d;
if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN)
return -ESHUTDOWN;
direction = mv_u3d_ep_dir(ep);
max = le16_to_cpu(desc->wMaxPacketSize);
if (!_ep->maxburst)
_ep->maxburst = 1;
maxburst = _ep->maxburst;
/* Get the endpoint context address */
ep_context = (struct mv_u3d_ep_context *)ep->ep_context;
/* Set the max burst size */
switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
case USB_ENDPOINT_XFER_BULK:
if (maxburst > 16) {
dev_dbg(u3d->dev,
"max burst should not be greater "
"than 16 on bulk ep\n");
maxburst = 1;
_ep->maxburst = maxburst;
}
dev_dbg(u3d->dev,
"maxburst: %d on bulk %s\n", maxburst, ep->name);
break;
case USB_ENDPOINT_XFER_CONTROL:
/* control transfer only supports maxburst as one */
maxburst = 1;
_ep->maxburst = maxburst;
break;
case USB_ENDPOINT_XFER_INT:
if (maxburst != 1) {
dev_dbg(u3d->dev,
"max burst should be 1 on int ep "
"if transfer size is not 1024\n");
maxburst = 1;
_ep->maxburst = maxburst;
}
break;
case USB_ENDPOINT_XFER_ISOC:
if (maxburst != 1) {
dev_dbg(u3d->dev,
"max burst should be 1 on isoc ep "
"if transfer size is not 1024\n");
maxburst = 1;
_ep->maxburst = maxburst;
}
break;
default:
goto en_done;
}
ep->ep.maxpacket = max;
ep->ep.desc = desc;
ep->enabled = 1;
/* Enable the endpoint for Rx or Tx and set the endpoint type */
if (direction == MV_U3D_EP_DIR_OUT) {
epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
epxcr |= MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
udelay(5);
epxcr &= ~MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
| ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
} else {
epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
epxcr |= MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
udelay(5);
epxcr &= ~MV_U3D_EPXCR_EP_INIT;
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
| ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
}
return 0;
en_done:
return -EINVAL;
}
static int mv_u3d_ep_disable(struct usb_ep *_ep)
{
struct mv_u3d *u3d;
struct mv_u3d_ep *ep;
struct mv_u3d_ep_context *ep_context;
u32 epxcr, direction;
if (!_ep)
return -EINVAL;
ep = container_of(_ep, struct mv_u3d_ep, ep);
if (!ep->ep.desc)
return -EINVAL;
u3d = ep->u3d;
/* Get the endpoint context address */
ep_context = ep->ep_context;
direction = mv_u3d_ep_dir(ep);
/* nuke all pending requests (does flush) */
mv_u3d_nuke(ep, -ESHUTDOWN);
/* Disable the endpoint for Rx or Tx and reset the endpoint type */
if (direction == MV_U3D_EP_DIR_OUT) {
epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| USB_ENDPOINT_XFERTYPE_MASK);
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
} else {
epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
| USB_ENDPOINT_XFERTYPE_MASK);
iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
}
ep->enabled = 0;
ep->ep.desc = NULL;
return 0;
}
static struct usb_request *
mv_u3d_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
{
struct mv_u3d_req *req = NULL;
req = kzalloc(sizeof *req, gfp_flags);
if (!req)
return NULL;
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void mv_u3d_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
struct mv_u3d_req *req = container_of(_req, struct mv_u3d_req, req);
kfree(req);
}
static void mv_u3d_ep_fifo_flush(struct usb_ep *_ep)
{
struct mv_u3d *u3d;
u32 direction;
struct mv_u3d_ep *ep = container_of(_ep, struct mv_u3d_ep, ep);
unsigned int loops;
u32 tmp;
/* if endpoint is not enabled, cannot flush endpoint */
if (!ep->enabled)
return;
u3d = ep->u3d;
direction = mv_u3d_ep_dir(ep);
/* ep0 need clear bit after flushing fifo. */
if (!ep->ep_num) {
if (direction == MV_U3D_EP_DIR_OUT) {
tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
tmp |= MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
udelay(10);
tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
} else {
tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
tmp |= MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
udelay(10);
tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
}
return;
}
if (direction == MV_U3D_EP_DIR_OUT) {
tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
tmp |= MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
/* Wait until flushing completed */
loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0) &
MV_U3D_EPXCR_EP_FLUSH) {
/*
* EP_FLUSH bit should be cleared to indicate this
* operation is complete
*/
if (loops == 0) {
dev_dbg(u3d->dev,
"EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
direction ? "in" : "out");
return;
}
loops--;
udelay(LOOPS_USEC);
}
} else { /* EP_DIR_IN */
tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
tmp |= MV_U3D_EPXCR_EP_FLUSH;
iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
/* Wait until flushing completed */
loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0) &
MV_U3D_EPXCR_EP_FLUSH) {
/*
* EP_FLUSH bit should be cleared to indicate this
* operation is complete
*/
if (loops == 0) {
dev_dbg(u3d->dev,
"EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
direction ? "in" : "out");
return;
}
loops--;
udelay(LOOPS_USEC);
}
}
}
/* queues (submits) an I/O request to an endpoint */
static int
mv_u3d_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
{
struct mv_u3d_ep *ep;
struct mv_u3d_req *req;
struct mv_u3d *u3d;
unsigned long flags;
int is_first_req = 0;
if (unlikely(!_ep || !_req))
return -EINVAL;
ep = container_of(_ep, struct mv_u3d_ep, ep);
u3d = ep->u3d;
req = container_of(_req, struct mv_u3d_req, req);
if (!ep->ep_num
&& u3d->ep0_state == MV_U3D_STATUS_STAGE
&& !_req->length) {
dev_dbg(u3d->dev, "ep0 status stage\n");
u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
return 0;
}
dev_dbg(u3d->dev, "%s: %s, req: 0x%p\n",
__func__, _ep->name, req);
/* catch various bogus parameters */
if (!req->req.complete || !req->req.buf
|| !list_empty(&req->queue)) {
dev_err(u3d->dev,
"%s, bad params, _req: 0x%p,"
"req->req.complete: 0x%p, req->req.buf: 0x%p,"
"list_empty: 0x%x\n",
__func__, _req,
req->req.complete, req->req.buf,
list_empty(&req->queue));
return -EINVAL;
}
if (unlikely(!ep->ep.desc)) {
dev_err(u3d->dev, "%s, bad ep\n", __func__);
return -EINVAL;
}
if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
if (req->req.length > ep->ep.maxpacket)
return -EMSGSIZE;
}
if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN) {
dev_err(u3d->dev,
"bad params of driver/speed\n");
return -ESHUTDOWN;
}
req->ep = ep;
/* Software list handles usb request. */
spin_lock_irqsave(&ep->req_lock, flags);
is_first_req = list_empty(&ep->req_list);
list_add_tail(&req->list, &ep->req_list);
spin_unlock_irqrestore(&ep->req_lock, flags);
if (!is_first_req) {
dev_dbg(u3d->dev, "list is not empty\n");
return 0;
}
dev_dbg(u3d->dev, "call mv_u3d_start_queue from usb_ep_queue\n");
spin_lock_irqsave(&u3d->lock, flags);
mv_u3d_start_queue(ep);
spin_unlock_irqrestore(&u3d->lock, flags);
return 0;
}
/* dequeues (cancels, unlinks) an I/O request from an endpoint */
static int mv_u3d_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct mv_u3d_ep *ep;
struct mv_u3d_req *req;
struct mv_u3d *u3d;
struct mv_u3d_ep_context *ep_context;
struct mv_u3d_req *next_req;
unsigned long flags;
int ret = 0;
if (!_ep || !_req)
return -EINVAL;
ep = container_of(_ep, struct mv_u3d_ep, ep);
u3d = ep->u3d;
spin_lock_irqsave(&ep->u3d->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) {
ret = -EINVAL;
goto out;
}
/* The request is in progress, or completed but not dequeued */
if (ep->queue.next == &req->queue) {
_req->status = -ECONNRESET;
mv_u3d_ep_fifo_flush(_ep);
/* The request isn't the last request in this ep queue */
if (req->queue.next != &ep->queue) {
dev_dbg(u3d->dev,
"it is the last request in this ep queue\n");
ep_context = ep->ep_context;
next_req = list_entry(req->queue.next,
struct mv_u3d_req, queue);
/* Point first TRB of next request to the EP context. */
iowrite32((unsigned long) next_req->trb_head,
&ep_context->trb_addr_lo);
} else {
struct mv_u3d_ep_context *ep_context;
ep_context = ep->ep_context;
ep_context->trb_addr_lo = 0;
ep_context->trb_addr_hi = 0;
}
} else
WARN_ON(1);
mv_u3d_done(ep, req, -ECONNRESET);
/* remove the req from the ep req list */
if (!list_empty(&ep->req_list)) {
struct mv_u3d_req *curr_req;
curr_req = list_entry(ep->req_list.next,
struct mv_u3d_req, list);
if (curr_req == req) {
list_del_init(&req->list);
ep->processing = 0;
}
}
out:
spin_unlock_irqrestore(&ep->u3d->lock, flags);
return ret;
}
static void
mv_u3d_ep_set_stall(struct mv_u3d *u3d, u8 ep_num, u8 direction, int stall)
{
u32 tmp;
struct mv_u3d_ep *ep = u3d->eps;
dev_dbg(u3d->dev, "%s\n", __func__);
if (direction == MV_U3D_EP_DIR_OUT) {
tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
if (stall)
tmp |= MV_U3D_EPXCR_EP_HALT;
else
tmp &= ~MV_U3D_EPXCR_EP_HALT;
iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
} else {
tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
if (stall)
tmp |= MV_U3D_EPXCR_EP_HALT;
else
tmp &= ~MV_U3D_EPXCR_EP_HALT;
iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
}
}
static int mv_u3d_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge)
{
struct mv_u3d_ep *ep;
unsigned long flags = 0;
int status = 0;
struct mv_u3d *u3d;
ep = container_of(_ep, struct mv_u3d_ep, ep);
u3d = ep->u3d;
if (!ep->ep.desc) {
status = -EINVAL;
goto out;
}
if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
status = -EOPNOTSUPP;
goto out;
}
/*
* Attempt to halt IN ep will fail if any transfer requests
* are still queue
*/
if (halt && (mv_u3d_ep_dir(ep) == MV_U3D_EP_DIR_IN)
&& !list_empty(&ep->queue)) {
status = -EAGAIN;
goto out;
}
spin_lock_irqsave(&ep->u3d->lock, flags);
mv_u3d_ep_set_stall(u3d, ep->ep_num, mv_u3d_ep_dir(ep), halt);
if (halt && wedge)
ep->wedge = 1;
else if (!halt)
ep->wedge = 0;
spin_unlock_irqrestore(&ep->u3d->lock, flags);
if (ep->ep_num == 0)
u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
out:
return status;
}
static int mv_u3d_ep_set_halt(struct usb_ep *_ep, int halt)
{
return mv_u3d_ep_set_halt_wedge(_ep, halt, 0);
}
static int mv_u3d_ep_set_wedge(struct usb_ep *_ep)
{
return mv_u3d_ep_set_halt_wedge(_ep, 1, 1);
}
static struct usb_ep_ops mv_u3d_ep_ops = {
.enable = mv_u3d_ep_enable,
.disable = mv_u3d_ep_disable,
.alloc_request = mv_u3d_alloc_request,
.free_request = mv_u3d_free_request,
.queue = mv_u3d_ep_queue,
.dequeue = mv_u3d_ep_dequeue,
.set_wedge = mv_u3d_ep_set_wedge,
.set_halt = mv_u3d_ep_set_halt,
.fifo_flush = mv_u3d_ep_fifo_flush,
};
static void mv_u3d_controller_stop(struct mv_u3d *u3d)
{
u32 tmp;
if (!u3d->clock_gating && u3d->vbus_valid_detect)
iowrite32(MV_U3D_INTR_ENABLE_VBUS_VALID,
&u3d->vuc_regs->intrenable);
else
iowrite32(0, &u3d->vuc_regs->intrenable);
iowrite32(~0x0, &u3d->vuc_regs->endcomplete);
iowrite32(~0x0, &u3d->vuc_regs->trbunderrun);
iowrite32(~0x0, &u3d->vuc_regs->trbcomplete);
iowrite32(~0x0, &u3d->vuc_regs->linkchange);
iowrite32(0x1, &u3d->vuc_regs->setuplock);
/* Reset the RUN bit in the command register to stop USB */
tmp = ioread32(&u3d->op_regs->usbcmd);
tmp &= ~MV_U3D_CMD_RUN_STOP;
iowrite32(tmp, &u3d->op_regs->usbcmd);
dev_dbg(u3d->dev, "after u3d_stop, USBCMD 0x%x\n",
ioread32(&u3d->op_regs->usbcmd));
}
static void mv_u3d_controller_start(struct mv_u3d *u3d)
{
u32 usbintr;
u32 temp;
/* enable link LTSSM state machine */
temp = ioread32(&u3d->vuc_regs->ltssm);
temp |= MV_U3D_LTSSM_PHY_INIT_DONE;
iowrite32(temp, &u3d->vuc_regs->ltssm);
/* Enable interrupts */
usbintr = MV_U3D_INTR_ENABLE_LINK_CHG | MV_U3D_INTR_ENABLE_TXDESC_ERR |
MV_U3D_INTR_ENABLE_RXDESC_ERR | MV_U3D_INTR_ENABLE_TX_COMPLETE |
MV_U3D_INTR_ENABLE_RX_COMPLETE | MV_U3D_INTR_ENABLE_SETUP |
(u3d->vbus_valid_detect ? MV_U3D_INTR_ENABLE_VBUS_VALID : 0);
iowrite32(usbintr, &u3d->vuc_regs->intrenable);
/* Enable ctrl ep */
iowrite32(0x1, &u3d->vuc_regs->ctrlepenable);
/* Set the Run bit in the command register */
iowrite32(MV_U3D_CMD_RUN_STOP, &u3d->op_regs->usbcmd);
dev_dbg(u3d->dev, "after u3d_start, USBCMD 0x%x\n",
ioread32(&u3d->op_regs->usbcmd));
}
static int mv_u3d_controller_reset(struct mv_u3d *u3d)
{
unsigned int loops;
u32 tmp;
/* Stop the controller */
tmp = ioread32(&u3d->op_regs->usbcmd);
tmp &= ~MV_U3D_CMD_RUN_STOP;
iowrite32(tmp, &u3d->op_regs->usbcmd);
/* Reset the controller to get default values */
iowrite32(MV_U3D_CMD_CTRL_RESET, &u3d->op_regs->usbcmd);
/* wait for reset to complete */
loops = LOOPS(MV_U3D_RESET_TIMEOUT);
while (ioread32(&u3d->op_regs->usbcmd) & MV_U3D_CMD_CTRL_RESET) {
if (loops == 0) {
dev_err(u3d->dev,
"Wait for RESET completed TIMEOUT\n");
return -ETIMEDOUT;
}
loops--;
udelay(LOOPS_USEC);
}
/* Configure the Endpoint Context Address */
iowrite32(u3d->ep_context_dma, &u3d->op_regs->dcbaapl);
iowrite32(0, &u3d->op_regs->dcbaaph);
return 0;
}
static int mv_u3d_enable(struct mv_u3d *u3d)
{
struct mv_usb_platform_data *pdata = u3d->dev->platform_data;
int retval;
if (u3d->active)
return 0;
if (!u3d->clock_gating) {
u3d->active = 1;
return 0;
}
dev_dbg(u3d->dev, "enable u3d\n");
clk_enable(u3d->clk);
if (pdata->phy_init) {
retval = pdata->phy_init(u3d->phy_regs);
if (retval) {
dev_err(u3d->dev,
"init phy error %d\n", retval);
clk_disable(u3d->clk);
return retval;
}
}
u3d->active = 1;
return 0;
}
static void mv_u3d_disable(struct mv_u3d *u3d)
{
struct mv_usb_platform_data *pdata = u3d->dev->platform_data;
if (u3d->clock_gating && u3d->active) {
dev_dbg(u3d->dev, "disable u3d\n");
if (pdata->phy_deinit)
pdata->phy_deinit(u3d->phy_regs);
clk_disable(u3d->clk);
u3d->active = 0;
}
}
static int mv_u3d_vbus_session(struct usb_gadget *gadget, int is_active)
{
struct mv_u3d *u3d;
unsigned long flags;
int retval = 0;
u3d = container_of(gadget, struct mv_u3d, gadget);
spin_lock_irqsave(&u3d->lock, flags);
u3d->vbus_active = (is_active != 0);
dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
__func__, u3d->softconnect, u3d->vbus_active);
/*
* 1. external VBUS detect: we can disable/enable clock on demand.
* 2. UDC VBUS detect: we have to enable clock all the time.
* 3. No VBUS detect: we have to enable clock all the time.
*/
if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
retval = mv_u3d_enable(u3d);
if (retval == 0) {
/*
* after clock is disabled, we lost all the register
* context. We have to re-init registers
*/
mv_u3d_controller_reset(u3d);
mv_u3d_ep0_reset(u3d);
mv_u3d_controller_start(u3d);
}
} else if (u3d->driver && u3d->softconnect) {
if (!u3d->active)
goto out;
/* stop all the transfer in queue*/
mv_u3d_stop_activity(u3d, u3d->driver);
mv_u3d_controller_stop(u3d);
mv_u3d_disable(u3d);
}
out:
spin_unlock_irqrestore(&u3d->lock, flags);
return retval;
}
/* constrain controller's VBUS power usage
* This call is used by gadget drivers during SET_CONFIGURATION calls,
* reporting how much power the device may consume. For example, this
* could affect how quickly batteries are recharged.
*
* Returns zero on success, else negative errno.
*/
static int mv_u3d_vbus_draw(struct usb_gadget *gadget, unsigned mA)
{
struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
u3d->power = mA;
return 0;
}
static int mv_u3d_pullup(struct usb_gadget *gadget, int is_on)
{
struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
unsigned long flags;
int retval = 0;
spin_lock_irqsave(&u3d->lock, flags);
dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
__func__, u3d->softconnect, u3d->vbus_active);
u3d->softconnect = (is_on != 0);
if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
retval = mv_u3d_enable(u3d);
if (retval == 0) {
/*
* after clock is disabled, we lost all the register
* context. We have to re-init registers
*/
mv_u3d_controller_reset(u3d);
mv_u3d_ep0_reset(u3d);
mv_u3d_controller_start(u3d);
}
} else if (u3d->driver && u3d->vbus_active) {
/* stop all the transfer in queue*/
mv_u3d_stop_activity(u3d, u3d->driver);
mv_u3d_controller_stop(u3d);
mv_u3d_disable(u3d);
}
spin_unlock_irqrestore(&u3d->lock, flags);
return retval;
}
static int mv_u3d_start(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
struct mv_usb_platform_data *pdata = u3d->dev->platform_data;
unsigned long flags;
if (u3d->driver)
return -EBUSY;
spin_lock_irqsave(&u3d->lock, flags);
if (!u3d->clock_gating) {
clk_enable(u3d->clk);
if (pdata->phy_init)
pdata->phy_init(u3d->phy_regs);
}
/* hook up the driver ... */
driver->driver.bus = NULL;
u3d->driver = driver;
u3d->ep0_dir = USB_DIR_OUT;
spin_unlock_irqrestore(&u3d->lock, flags);
u3d->vbus_valid_detect = 1;
return 0;
}
static int mv_u3d_stop(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
struct mv_usb_platform_data *pdata = u3d->dev->platform_data;
unsigned long flags;
u3d->vbus_valid_detect = 0;
spin_lock_irqsave(&u3d->lock, flags);
/* enable clock to access controller register */
clk_enable(u3d->clk);
if (pdata->phy_init)
pdata->phy_init(u3d->phy_regs);
mv_u3d_controller_stop(u3d);
/* stop all usb activities */
u3d->gadget.speed = USB_SPEED_UNKNOWN;
mv_u3d_stop_activity(u3d, driver);
mv_u3d_disable(u3d);
if (pdata->phy_deinit)
pdata->phy_deinit(u3d->phy_regs);
clk_disable(u3d->clk);
spin_unlock_irqrestore(&u3d->lock, flags);
u3d->driver = NULL;
return 0;
}
/* device controller usb_gadget_ops structure */
static const struct usb_gadget_ops mv_u3d_ops = {
/* notify controller that VBUS is powered or not */
.vbus_session = mv_u3d_vbus_session,
/* constrain controller's VBUS power usage */
.vbus_draw = mv_u3d_vbus_draw,
.pullup = mv_u3d_pullup,
.udc_start = mv_u3d_start,
.udc_stop = mv_u3d_stop,
};
static int mv_u3d_eps_init(struct mv_u3d *u3d)
{
struct mv_u3d_ep *ep;
char name[14];
int i;
/* initialize ep0, ep0 in/out use eps[1] */
ep = &u3d->eps[1];
ep->u3d = u3d;
strncpy(ep->name, "ep0", sizeof(ep->name));
ep->ep.name = ep->name;
ep->ep.ops = &mv_u3d_ep_ops;
ep->wedge = 0;
ep->ep.maxpacket = MV_U3D_EP0_MAX_PKT_SIZE;
ep->ep_num = 0;
ep->ep.desc = &mv_u3d_ep0_desc;
INIT_LIST_HEAD(&ep->queue);
INIT_LIST_HEAD(&ep->req_list);
ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
/* add ep0 ep_context */
ep->ep_context = &u3d->ep_context[1];
/* initialize other endpoints */
for (i = 2; i < u3d->max_eps * 2; i++) {
ep = &u3d->eps[i];
if (i & 1) {
snprintf(name, sizeof(name), "ep%din", i >> 1);
ep->direction = MV_U3D_EP_DIR_IN;
} else {
snprintf(name, sizeof(name), "ep%dout", i >> 1);
ep->direction = MV_U3D_EP_DIR_OUT;
}
ep->u3d = u3d;
strncpy(ep->name, name, sizeof(ep->name));
ep->ep.name = ep->name;
ep->ep.ops = &mv_u3d_ep_ops;
ep->ep.maxpacket = (unsigned short) ~0;
ep->ep_num = i / 2;
INIT_LIST_HEAD(&ep->queue);
list_add_tail(&ep->ep.ep_list, &u3d->gadget.ep_list);
INIT_LIST_HEAD(&ep->req_list);
spin_lock_init(&ep->req_lock);
ep->ep_context = &u3d->ep_context[i];
}
return 0;
}
/* delete all endpoint requests, called with spinlock held */
static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status)
{
/* endpoint fifo flush */
mv_u3d_ep_fifo_flush(&ep->ep);
while (!list_empty(&ep->queue)) {
struct mv_u3d_req *req = NULL;
req = list_entry(ep->queue.next, struct mv_u3d_req, queue);
mv_u3d_done(ep, req, status);
}
}
/* stop all USB activities */
static
void mv_u3d_stop_activity(struct mv_u3d *u3d, struct usb_gadget_driver *driver)
{
struct mv_u3d_ep *ep;
mv_u3d_nuke(&u3d->eps[1], -ESHUTDOWN);
list_for_each_entry(ep, &u3d->gadget.ep_list, ep.ep_list) {
mv_u3d_nuke(ep, -ESHUTDOWN);
}
/* report disconnect; the driver is already quiesced */
if (driver) {
spin_unlock(&u3d->lock);
driver->disconnect(&u3d->gadget);
spin_lock(&u3d->lock);
}
}
static void mv_u3d_irq_process_error(struct mv_u3d *u3d)
{
/* Increment the error count */
u3d->errors++;
dev_err(u3d->dev, "%s\n", __func__);
}
static void mv_u3d_irq_process_link_change(struct mv_u3d *u3d)
{
u32 linkchange;
linkchange = ioread32(&u3d->vuc_regs->linkchange);
iowrite32(linkchange, &u3d->vuc_regs->linkchange);
dev_dbg(u3d->dev, "linkchange: 0x%x\n", linkchange);
if (linkchange & MV_U3D_LINK_CHANGE_LINK_UP) {
dev_dbg(u3d->dev, "link up: ltssm state: 0x%x\n",
ioread32(&u3d->vuc_regs->ltssmstate));
u3d->usb_state = USB_STATE_DEFAULT;
u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
/* set speed */
u3d->gadget.speed = USB_SPEED_SUPER;
}
if (linkchange & MV_U3D_LINK_CHANGE_SUSPEND) {
dev_dbg(u3d->dev, "link suspend\n");
u3d->resume_state = u3d->usb_state;
u3d->usb_state = USB_STATE_SUSPENDED;
}
if (linkchange & MV_U3D_LINK_CHANGE_RESUME) {
dev_dbg(u3d->dev, "link resume\n");
u3d->usb_state = u3d->resume_state;
u3d->resume_state = 0;
}
if (linkchange & MV_U3D_LINK_CHANGE_WRESET) {
dev_dbg(u3d->dev, "warm reset\n");
u3d->usb_state = USB_STATE_POWERED;
}
if (linkchange & MV_U3D_LINK_CHANGE_HRESET) {
dev_dbg(u3d->dev, "hot reset\n");
u3d->usb_state = USB_STATE_DEFAULT;
}
if (linkchange & MV_U3D_LINK_CHANGE_INACT)
dev_dbg(u3d->dev, "inactive\n");
if (linkchange & MV_U3D_LINK_CHANGE_DISABLE_AFTER_U0)
dev_dbg(u3d->dev, "ss.disabled\n");
if (linkchange & MV_U3D_LINK_CHANGE_VBUS_INVALID) {
dev_dbg(u3d->dev, "vbus invalid\n");
u3d->usb_state = USB_STATE_ATTACHED;
u3d->vbus_valid_detect = 1;
/* if external vbus detect is not supported,
* we handle it here.
*/
if (!u3d->vbus) {
spin_unlock(&u3d->lock);
mv_u3d_vbus_session(&u3d->gadget, 0);
spin_lock(&u3d->lock);
}
}
}
static void mv_u3d_ch9setaddress(struct mv_u3d *u3d,
struct usb_ctrlrequest *setup)
{
u32 tmp;
if (u3d->usb_state != USB_STATE_DEFAULT) {
dev_err(u3d->dev,
"%s, cannot setaddr in this state (%d)\n",
__func__, u3d->usb_state);
goto err;
}
u3d->dev_addr = (u8)setup->wValue;
dev_dbg(u3d->dev, "%s: 0x%x\n", __func__, u3d->dev_addr);
if (u3d->dev_addr > 127) {
dev_err(u3d->dev,
"%s, u3d address is wrong (out of range)\n", __func__);
u3d->dev_addr = 0;
goto err;
}
/* update usb state */
u3d->usb_state = USB_STATE_ADDRESS;
/* set the new address */
tmp = ioread32(&u3d->vuc_regs->devaddrtiebrkr);
tmp &= ~0x7F;
tmp |= (u32)u3d->dev_addr;
iowrite32(tmp, &u3d->vuc_regs->devaddrtiebrkr);
return;
err:
mv_u3d_ep0_stall(u3d);
}
static int mv_u3d_is_set_configuration(struct usb_ctrlrequest *setup)
{
if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
if (setup->bRequest == USB_REQ_SET_CONFIGURATION)
return 1;
return 0;
}
static void mv_u3d_handle_setup_packet(struct mv_u3d *u3d, u8 ep_num,
struct usb_ctrlrequest *setup)
__releases(&u3c->lock)
__acquires(&u3c->lock)
{
bool delegate = false;
mv_u3d_nuke(&u3d->eps[ep_num * 2 + MV_U3D_EP_DIR_IN], -ESHUTDOWN);
dev_dbg(u3d->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
setup->bRequestType, setup->bRequest,
setup->wValue, setup->wIndex, setup->wLength);
/* We process some stardard setup requests here */
if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
switch (setup->bRequest) {
case USB_REQ_GET_STATUS:
delegate = true;
break;
case USB_REQ_SET_ADDRESS:
mv_u3d_ch9setaddress(u3d, setup);
break;
case USB_REQ_CLEAR_FEATURE:
delegate = true;
break;
case USB_REQ_SET_FEATURE:
delegate = true;
break;
default:
delegate = true;
}
} else
delegate = true;
/* delegate USB standard requests to the gadget driver */
if (delegate == true) {
/* USB requests handled by gadget */
if (setup->wLength) {
/* DATA phase from gadget, STATUS phase from u3d */
u3d->ep0_dir = (setup->bRequestType & USB_DIR_IN)
? MV_U3D_EP_DIR_IN : MV_U3D_EP_DIR_OUT;
spin_unlock(&u3d->lock);
if (u3d->driver->setup(&u3d->gadget,
&u3d->local_setup_buff) < 0) {
dev_err(u3d->dev, "setup error!\n");
mv_u3d_ep0_stall(u3d);
}
spin_lock(&u3d->lock);
} else {
/* no DATA phase, STATUS phase from gadget */
u3d->ep0_dir = MV_U3D_EP_DIR_IN;
u3d->ep0_state = MV_U3D_STATUS_STAGE;
spin_unlock(&u3d->lock);
if (u3d->driver->setup(&u3d->gadget,
&u3d->local_setup_buff) < 0)
mv_u3d_ep0_stall(u3d);
spin_lock(&u3d->lock);
}
if (mv_u3d_is_set_configuration(setup)) {
dev_dbg(u3d->dev, "u3d configured\n");
u3d->usb_state = USB_STATE_CONFIGURED;
}
}
}
static void mv_u3d_get_setup_data(struct mv_u3d *u3d, u8 ep_num, u8 *buffer_ptr)
{
struct mv_u3d_ep_context *epcontext;
epcontext = &u3d->ep_context[ep_num * 2 + MV_U3D_EP_DIR_IN];
/* Copy the setup packet to local buffer */
memcpy(buffer_ptr, (u8 *) &epcontext->setup_buffer, 8);
}
static void mv_u3d_irq_process_setup(struct mv_u3d *u3d)
{
u32 tmp, i;
/* Process all Setup packet received interrupts */
tmp = ioread32(&u3d->vuc_regs->setuplock);
if (tmp) {
for (i = 0; i < u3d->max_eps; i++) {
if (tmp & (1 << i)) {
mv_u3d_get_setup_data(u3d, i,
(u8 *)(&u3d->local_setup_buff));
mv_u3d_handle_setup_packet(u3d, i,
&u3d->local_setup_buff);
}
}
}
iowrite32(tmp, &u3d->vuc_regs->setuplock);
}
static void mv_u3d_irq_process_tr_complete(struct mv_u3d *u3d)
{
u32 tmp, bit_pos;
int i, ep_num = 0, direction = 0;
struct mv_u3d_ep *curr_ep;
struct mv_u3d_req *curr_req, *temp_req;
int status;
tmp = ioread32(&u3d->vuc_regs->endcomplete);
dev_dbg(u3d->dev, "tr_complete: ep: 0x%x\n", tmp);
if (!tmp)
return;
iowrite32(tmp, &u3d->vuc_regs->endcomplete);
for (i = 0; i < u3d->max_eps * 2; i++) {
ep_num = i >> 1;
direction = i % 2;
bit_pos = 1 << (ep_num + 16 * direction);
if (!(bit_pos & tmp))
continue;
if (i == 0)
curr_ep = &u3d->eps[1];
else
curr_ep = &u3d->eps[i];
/* remove req out of ep request list after completion */
dev_dbg(u3d->dev, "tr comp: check req_list\n");
spin_lock(&curr_ep->req_lock);
if (!list_empty(&curr_ep->req_list)) {
struct mv_u3d_req *req;
req = list_entry(curr_ep->req_list.next,
struct mv_u3d_req, list);
list_del_init(&req->list);
curr_ep->processing = 0;
}
spin_unlock(&curr_ep->req_lock);
/* process the req queue until an uncomplete request */
list_for_each_entry_safe(curr_req, temp_req,
&curr_ep->queue, queue) {
status = mv_u3d_process_ep_req(u3d, i, curr_req);
if (status)
break;
/* write back status to req */
curr_req->req.status = status;
/* ep0 request completion */
if (ep_num == 0) {
mv_u3d_done(curr_ep, curr_req, 0);
break;
} else {
mv_u3d_done(curr_ep, curr_req, status);
}
}
dev_dbg(u3d->dev, "call mv_u3d_start_queue from ep complete\n");
mv_u3d_start_queue(curr_ep);
}
}
static irqreturn_t mv_u3d_irq(int irq, void *dev)
{
struct mv_u3d *u3d = (struct mv_u3d *)dev;
u32 status, intr;
u32 bridgesetting;
u32 trbunderrun;
spin_lock(&u3d->lock);
status = ioread32(&u3d->vuc_regs->intrcause);
intr = ioread32(&u3d->vuc_regs->intrenable);
status &= intr;
if (status == 0) {
spin_unlock(&u3d->lock);
dev_err(u3d->dev, "irq error!\n");
return IRQ_NONE;
}
if (status & MV_U3D_USBINT_VBUS_VALID) {
bridgesetting = ioread32(&u3d->vuc_regs->bridgesetting);
if (bridgesetting & MV_U3D_BRIDGE_SETTING_VBUS_VALID) {
/* write vbus valid bit of bridge setting to clear */
bridgesetting = MV_U3D_BRIDGE_SETTING_VBUS_VALID;
iowrite32(bridgesetting, &u3d->vuc_regs->bridgesetting);
dev_dbg(u3d->dev, "vbus valid\n");
u3d->usb_state = USB_STATE_POWERED;
u3d->vbus_valid_detect = 0;
/* if external vbus detect is not supported,
* we handle it here.
*/
if (!u3d->vbus) {
spin_unlock(&u3d->lock);
mv_u3d_vbus_session(&u3d->gadget, 1);
spin_lock(&u3d->lock);
}
} else
dev_err(u3d->dev, "vbus bit is not set\n");
}
/* RX data is already in the 16KB FIFO.*/
if (status & MV_U3D_USBINT_UNDER_RUN) {
trbunderrun = ioread32(&u3d->vuc_regs->trbunderrun);
dev_err(u3d->dev, "under run, ep%d\n", trbunderrun);
iowrite32(trbunderrun, &u3d->vuc_regs->trbunderrun);
mv_u3d_irq_process_error(u3d);
}
if (status & (MV_U3D_USBINT_RXDESC_ERR | MV_U3D_USBINT_TXDESC_ERR)) {
/* write one to clear */
iowrite32(status & (MV_U3D_USBINT_RXDESC_ERR
| MV_U3D_USBINT_TXDESC_ERR),
&u3d->vuc_regs->intrcause);
dev_err(u3d->dev, "desc err 0x%x\n", status);
mv_u3d_irq_process_error(u3d);
}
if (status & MV_U3D_USBINT_LINK_CHG)
mv_u3d_irq_process_link_change(u3d);
if (status & MV_U3D_USBINT_TX_COMPLETE)
mv_u3d_irq_process_tr_complete(u3d);
if (status & MV_U3D_USBINT_RX_COMPLETE)
mv_u3d_irq_process_tr_complete(u3d);
if (status & MV_U3D_USBINT_SETUP)
mv_u3d_irq_process_setup(u3d);
spin_unlock(&u3d->lock);
return IRQ_HANDLED;
}
static int mv_u3d_remove(struct platform_device *dev)
{
struct mv_u3d *u3d = platform_get_drvdata(dev);
BUG_ON(u3d == NULL);
usb_del_gadget_udc(&u3d->gadget);
/* free memory allocated in probe */
if (u3d->trb_pool)
dma_pool_destroy(u3d->trb_pool);
if (u3d->ep_context)
dma_free_coherent(&dev->dev, u3d->ep_context_size,
u3d->ep_context, u3d->ep_context_dma);
kfree(u3d->eps);
if (u3d->irq)
free_irq(u3d->irq, &dev->dev);
if (u3d->cap_regs)
iounmap(u3d->cap_regs);
u3d->cap_regs = NULL;
kfree(u3d->status_req);
clk_put(u3d->clk);
platform_set_drvdata(dev, NULL);
kfree(u3d);
return 0;
}
static int mv_u3d_probe(struct platform_device *dev)
{
struct mv_u3d *u3d = NULL;
struct mv_usb_platform_data *pdata = dev->dev.platform_data;
int retval = 0;
struct resource *r;
size_t size;
if (!dev->dev.platform_data) {
dev_err(&dev->dev, "missing platform_data\n");
retval = -ENODEV;
goto err_pdata;
}
u3d = kzalloc(sizeof(*u3d), GFP_KERNEL);
if (!u3d) {
dev_err(&dev->dev, "failed to allocate memory for u3d\n");
retval = -ENOMEM;
goto err_alloc_private;
}
spin_lock_init(&u3d->lock);
platform_set_drvdata(dev, u3d);
u3d->dev = &dev->dev;
u3d->vbus = pdata->vbus;
u3d->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(u3d->clk)) {
retval = PTR_ERR(u3d->clk);
goto err_get_clk;
}
r = platform_get_resource_byname(dev, IORESOURCE_MEM, "capregs");
if (!r) {
dev_err(&dev->dev, "no I/O memory resource defined\n");
retval = -ENODEV;
goto err_get_cap_regs;
}
u3d->cap_regs = (struct mv_u3d_cap_regs __iomem *)
ioremap(r->start, resource_size(r));
if (!u3d->cap_regs) {
dev_err(&dev->dev, "failed to map I/O memory\n");
retval = -EBUSY;
goto err_map_cap_regs;
} else {
dev_dbg(&dev->dev, "cap_regs address: 0x%lx/0x%lx\n",
(unsigned long) r->start,
(unsigned long) u3d->cap_regs);
}
/* we will access controller register, so enable the u3d controller */
clk_enable(u3d->clk);
if (pdata->phy_init) {
retval = pdata->phy_init(u3d->phy_regs);
if (retval) {
dev_err(&dev->dev, "init phy error %d\n", retval);
goto err_u3d_enable;
}
}
u3d->op_regs = (struct mv_u3d_op_regs __iomem *)(u3d->cap_regs
+ MV_U3D_USB3_OP_REGS_OFFSET);
u3d->vuc_regs = (struct mv_u3d_vuc_regs __iomem *)(u3d->cap_regs
+ ioread32(&u3d->cap_regs->vuoff));
u3d->max_eps = 16;
/*
* some platform will use usb to download image, it may not disconnect
* usb gadget before loading kernel. So first stop u3d here.
*/
mv_u3d_controller_stop(u3d);
iowrite32(0xFFFFFFFF, &u3d->vuc_regs->intrcause);
if (pdata->phy_deinit)
pdata->phy_deinit(u3d->phy_regs);
clk_disable(u3d->clk);
size = u3d->max_eps * sizeof(struct mv_u3d_ep_context) * 2;
size = (size + MV_U3D_EP_CONTEXT_ALIGNMENT - 1)
& ~(MV_U3D_EP_CONTEXT_ALIGNMENT - 1);
u3d->ep_context = dma_alloc_coherent(&dev->dev, size,
&u3d->ep_context_dma, GFP_KERNEL);
if (!u3d->ep_context) {
dev_err(&dev->dev, "allocate ep context memory failed\n");
retval = -ENOMEM;
goto err_alloc_ep_context;
}
u3d->ep_context_size = size;
/* create TRB dma_pool resource */
u3d->trb_pool = dma_pool_create("u3d_trb",
&dev->dev,
sizeof(struct mv_u3d_trb_hw),
MV_U3D_TRB_ALIGNMENT,
MV_U3D_DMA_BOUNDARY);
if (!u3d->trb_pool) {
retval = -ENOMEM;
goto err_alloc_trb_pool;
}
size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2;
u3d->eps = kzalloc(size, GFP_KERNEL);
if (!u3d->eps) {
dev_err(&dev->dev, "allocate ep memory failed\n");
retval = -ENOMEM;
goto err_alloc_eps;
}
/* initialize ep0 status request structure */
u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL);
if (!u3d->status_req) {
dev_err(&dev->dev, "allocate status_req memory failed\n");
retval = -ENOMEM;
goto err_alloc_status_req;
}
INIT_LIST_HEAD(&u3d->status_req->queue);
/* allocate a small amount of memory to get valid address */
u3d->status_req->req.buf = (char *)u3d->status_req
+ sizeof(struct mv_u3d_req);
u3d->status_req->req.dma = virt_to_phys(u3d->status_req->req.buf);
u3d->resume_state = USB_STATE_NOTATTACHED;
u3d->usb_state = USB_STATE_ATTACHED;
u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
u3d->remote_wakeup = 0;
r = platform_get_resource(dev, IORESOURCE_IRQ, 0);
if (!r) {
dev_err(&dev->dev, "no IRQ resource defined\n");
retval = -ENODEV;
goto err_get_irq;
}
u3d->irq = r->start;
if (request_irq(u3d->irq, mv_u3d_irq,
IRQF_DISABLED | IRQF_SHARED, driver_name, u3d)) {
u3d->irq = 0;
dev_err(&dev->dev, "Request irq %d for u3d failed\n",
u3d->irq);
retval = -ENODEV;
goto err_request_irq;
}
/* initialize gadget structure */
u3d->gadget.ops = &mv_u3d_ops; /* usb_gadget_ops */
u3d->gadget.ep0 = &u3d->eps[1].ep; /* gadget ep0 */
INIT_LIST_HEAD(&u3d->gadget.ep_list); /* ep_list */
u3d->gadget.speed = USB_SPEED_UNKNOWN; /* speed */
/* the "gadget" abstracts/virtualizes the controller */
u3d->gadget.name = driver_name; /* gadget name */
mv_u3d_eps_init(u3d);
/* external vbus detection */
if (u3d->vbus) {
u3d->clock_gating = 1;
dev_err(&dev->dev, "external vbus detection\n");
}
if (!u3d->clock_gating)
u3d->vbus_active = 1;
/* enable usb3 controller vbus detection */
u3d->vbus_valid_detect = 1;
retval = usb_add_gadget_udc(&dev->dev, &u3d->gadget);
if (retval)
goto err_unregister;
dev_dbg(&dev->dev, "successful probe usb3 device %s clock gating.\n",
u3d->clock_gating ? "with" : "without");
return 0;
err_unregister:
free_irq(u3d->irq, &dev->dev);
err_request_irq:
err_get_irq:
kfree(u3d->status_req);
err_alloc_status_req:
kfree(u3d->eps);
err_alloc_eps:
dma_pool_destroy(u3d->trb_pool);
err_alloc_trb_pool:
dma_free_coherent(&dev->dev, u3d->ep_context_size,
u3d->ep_context, u3d->ep_context_dma);
err_alloc_ep_context:
if (pdata->phy_deinit)
pdata->phy_deinit(u3d->phy_regs);
clk_disable(u3d->clk);
err_u3d_enable:
iounmap(u3d->cap_regs);
err_map_cap_regs:
err_get_cap_regs:
err_get_clk:
clk_put(u3d->clk);
platform_set_drvdata(dev, NULL);
kfree(u3d);
err_alloc_private:
err_pdata:
return retval;
}
#ifdef CONFIG_PM_SLEEP
static int mv_u3d_suspend(struct device *dev)
{
struct mv_u3d *u3d = dev_get_drvdata(dev);
/*
* only cable is unplugged, usb can suspend.
* So do not care about clock_gating == 1, it is handled by
* vbus session.
*/
if (!u3d->clock_gating) {
mv_u3d_controller_stop(u3d);
spin_lock_irq(&u3d->lock);
/* stop all usb activities */
mv_u3d_stop_activity(u3d, u3d->driver);
spin_unlock_irq(&u3d->lock);
mv_u3d_disable(u3d);
}
return 0;
}
static int mv_u3d_resume(struct device *dev)
{
struct mv_u3d *u3d = dev_get_drvdata(dev);
int retval;
if (!u3d->clock_gating) {
retval = mv_u3d_enable(u3d);
if (retval)
return retval;
if (u3d->driver && u3d->softconnect) {
mv_u3d_controller_reset(u3d);
mv_u3d_ep0_reset(u3d);
mv_u3d_controller_start(u3d);
}
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mv_u3d_pm_ops, mv_u3d_suspend, mv_u3d_resume);
static void mv_u3d_shutdown(struct platform_device *dev)
{
struct mv_u3d *u3d = dev_get_drvdata(&dev->dev);
u32 tmp;
tmp = ioread32(&u3d->op_regs->usbcmd);
tmp &= ~MV_U3D_CMD_RUN_STOP;
iowrite32(tmp, &u3d->op_regs->usbcmd);
}
static struct platform_driver mv_u3d_driver = {
.probe = mv_u3d_probe,
.remove = mv_u3d_remove,
.shutdown = mv_u3d_shutdown,
.driver = {
.owner = THIS_MODULE,
.name = "mv-u3d",
.pm = &mv_u3d_pm_ops,
},
};
module_platform_driver(mv_u3d_driver);
MODULE_ALIAS("platform:mv-u3d");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Yu Xu <yuxu@marvell.com>");
MODULE_LICENSE("GPL");
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