bkgpl/cyb4_linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
cyb4_linux/drivers/usb/host/usb_otg/dwc_otg_pcd.c

2155 lines
56 KiB
C
Raw Permalink Blame History

/* ==========================================================================
*
* Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
* "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
* otherwise expressly agreed to in writing between Synopsys and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product under
* any End User Software License Agreement or Agreement for Licensed Product
* with Synopsys or any supplement thereto. You are permitted to use and
* redistribute this Software in source and binary forms, with or without
* modification, provided that redistributions of source code must retain this
* notice. You may not view, use, disclose, copy or distribute this file or
* any information contained herein except pursuant to this license grant from
* Synopsys. If you do not agree with this notice, including the disclaimer
* below, then you are not authorized to use the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
* ========================================================================== */
//#ifndef DWC_HOST_ONLY
#if 0
/** @file
* This file implements the Peripheral Controller Driver.
*
* The Peripheral Controller Driver (PCD) is responsible for
* translating requests from the Function Driver into the appropriate
* actions on the DWC_otg controller. It isolates the Function Driver
* from the specifics of the controller by providing an API to the
* Function Driver.
*
* The Peripheral Controller Driver for Linux will implement the
* Gadget API, so that the existing Gadget drivers can be used.
* (Gadget Driver is the Linux terminology for a Function Driver.)
*
* The Linux Gadget API is defined in the header file
* <code><linux/usb_gadget.h></code>. The USB EP operations API is
* defined in the structure <code>usb_ep_ops</code> and the USB
* Controller API is defined in the structure
* <code>usb_gadget_ops</code>.
*
* An important function of the PCD is managing interrupts generated
* by the DWC_otg controller. The implementation of the DWC_otg device
* mode interrupt service routines is in dwc_otg_pcd_intr.c.
*
* @todo Add Device Mode test modes (Test J mode, Test K mode, etc).
* @todo Does it work when the request size is greater than DEPTSIZ
* transfer size
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/dma-mapping.h>
#include <linux/version.h>
#include <asm/arch/lm.h>
#include <asm/arch/irqs.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
# include <linux/usb/ch9.h>
#else
# include <linux/usb_ch9.h>
#endif
#include <linux/usb_gadget.h>
#include "dwc_otg_driver.h"
#include "dwc_otg_pcd.h"
/**
* Static PCD pointer for use in usb_gadget_register_driver and
* usb_gadget_unregister_driver. Initialized in dwc_otg_pcd_init.
*/
static dwc_otg_pcd_t *s_pcd = 0;
/* Display the contents of the buffer */
extern void dump_msg(const u8 * buf, unsigned int length);
/**
* This function completes a request. It call's the request call back.
*/
void request_done(dwc_otg_pcd_ep_t * _ep, dwc_otg_pcd_request_t * _req, int _status)
{
unsigned stopped = _ep->stopped;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _ep);
list_del_init(&_req->queue);
if (_req->req.status == -EINPROGRESS) {
_req->req.status = _status;
} else {
_status = _req->req.status;
}
/* don't modify queue heads during completion callback */
_ep->stopped = 1;
SPIN_UNLOCK(&_ep->pcd->lock);
_req->req.complete(&_ep->ep, &_req->req);
SPIN_LOCK(&_ep->pcd->lock);
if (_ep->pcd->request_pending > 0) {
--_ep->pcd->request_pending;
}
_ep->stopped = stopped;
}
/**
* This function terminates all the requsts in the EP request queue.
*/
void request_nuke(dwc_otg_pcd_ep_t * _ep)
{
dwc_otg_pcd_request_t *req;
_ep->stopped = 1;
/* called with irqs blocked?? */
while (!list_empty(&_ep->queue)) {
req = list_entry(_ep->queue.next, dwc_otg_pcd_request_t, queue);
request_done(_ep, req, -ESHUTDOWN);
}
}
/* USB Endpoint Operations */
/*
* The following sections briefly describe the behavior of the Gadget
* API endpoint operations implemented in the DWC_otg driver
* software. Detailed descriptions of the generic behavior of each of
* these functions can be found in the Linux header file
* include/linux/usb_gadget.h.
*
* The Gadget API provides wrapper functions for each of the function
* pointers defined in usb_ep_ops. The Gadget Driver calls the wrapper
* function, which then calls the underlying PCD function. The
* following sections are named according to the wrapper
* functions. Within each section, the corresponding DWC_otg PCD
* function name is specified.
*
*/
/**
* This function assigns periodic Tx FIFO to an periodic EP
* in shared Tx FIFO mode
*/
static uint32_t assign_perio_tx_fifo(dwc_otg_core_if_t * core_if)
{
uint32_t PerTxMsk = 1;
int i;
for (i = 0; i < core_if->hwcfg4.b.num_dev_perio_in_ep; ++i) {
if ((PerTxMsk & core_if->p_tx_msk) == 0) {
core_if->p_tx_msk |= PerTxMsk;
return i + 1;
}
PerTxMsk <<= 1;
}
return 0;
}
/**
* This function releases periodic Tx FIFO
* in shared Tx FIFO mode
*/
static void release_perio_tx_fifo(dwc_otg_core_if_t * core_if, uint32_t fifo_num)
{
core_if->p_tx_msk = (core_if->p_tx_msk & (1 << (fifo_num - 1))) ^ core_if->p_tx_msk;
}
/**
* This function assigns periodic Tx FIFO to an periodic EP
* in shared Tx FIFO mode
*/
static uint32_t assign_tx_fifo(dwc_otg_core_if_t * core_if)
{
uint32_t TxMsk = 1;
int i;
for (i = 0; i < core_if->hwcfg4.b.num_in_eps; ++i) {
if ((TxMsk & core_if->tx_msk) == 0) {
core_if->tx_msk |= TxMsk;
return i + 1;
}
TxMsk <<= 1;
}
return 0;
}
/**
* This function releases periodic Tx FIFO
* in shared Tx FIFO mode
*/
static void release_tx_fifo(dwc_otg_core_if_t * core_if, uint32_t fifo_num)
{
core_if->tx_msk = (core_if->tx_msk & (1 << (fifo_num - 1))) ^ core_if->tx_msk;
}
/**
* This function allocates a DMA Descriptor chain for the Endpoint
* buffer to be used for a transfer to/from the specified endpoint.
*
* @param _ep The endpoint for which is allocated Descriptor chain
* @param count The desired number of Descriptors in the chain
*/
static dwc_otg_dma_desc_t *ep_alloc_desc(uint32_t * dma_desc_addr)
{
return dma_alloc_coherent(NULL, sizeof(dwc_otg_dma_desc_t), dma_desc_addr, GFP_KERNEL);
}
/**
* This function frees a DMA Descriptor chain that was allocated by ep_alloc_desc.
*
* @param _ep The endpoint - the owner of the Descriptor chain
* @param count The desired number of Descriptors in the chain
*/
static void ep_free_desc(dwc_otg_dma_desc_t * desc_addr, uint32_t dma_desc_addr)
{
dma_free_coherent(NULL, sizeof(dwc_otg_dma_desc_t), desc_addr, dma_desc_addr);
}
#ifdef _EN_ISOC_
/**
* This function allocates a DMA Descriptor chain for the Endpoint
* buffer to be used for a transfer to/from the specified endpoint.
*
* @param _ep The endpoint for which is allocated Descriptor chain
* @param count The desired number of Descriptors in the chain
*/
static dwc_otg_iso_dma_desc_t *ep_alloc_iso_desc_chain(uint32_t * dma_desc_addr, uint32_t count)
{
return dma_alloc_coherent(NULL, count * sizeof(dwc_otg_iso_dma_desc_t), dma_desc_addr,
GFP_KERNEL);
}
/**
* This function frees a DMA Descriptor chain that was allocated by ep_alloc_desc.
*
* @param _ep The endpoint - the owner of the Descriptor chain
* @param count The desired number of Descriptors in the chain
*/
static void ep_free_iso_desc_chain(dwc_otg_iso_dma_desc_t * desc_addr, uint32_t dma_desc_addr,
uint32_t count)
{
dma_free_coherent(NULL, count * sizeof(dwc_otg_dma_desc_t), desc_addr, dma_desc_addr);
}
#endif //_EN_ISOC_
/**
* This function is called by the Gadget Driver for each EP to be
* configured for the current configuration (SET_CONFIGURATION).
*
* This function initializes the dwc_otg_ep_t data structure, and then
* calls dwc_otg_ep_activate.
*/
static int dwc_otg_pcd_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *_desc)
{
dwc_otg_pcd_ep_t *ep = 0;
dwc_otg_pcd_t *pcd = 0;
unsigned long flags;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, _ep, _desc);
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || !_desc || ep->desc || _desc->bDescriptorType != USB_DT_ENDPOINT) {
DWC_WARN("%s, bad ep or descriptor\n", __func__);
return -EINVAL;
}
if (ep == &ep->pcd->ep0) {
DWC_WARN("%s, bad ep(0)\n", __func__);
return -EINVAL;
}
/* Check FIFO size? */
if (!_desc->wMaxPacketSize) {
DWC_WARN("%s, bad %s maxpacket\n", __func__, _ep->name);
return -ERANGE;
}
pcd = ep->pcd;
if (!pcd->driver || pcd->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_WARN("%s, bogus device state\n", __func__);
return -ESHUTDOWN;
}
SPIN_LOCK_IRQSAVE(&pcd->lock, flags);
ep->desc = _desc;
ep->ep.maxpacket = le16_to_cpu(_desc->wMaxPacketSize);
/*
* Activate the EP
*/
ep->stopped = 0;
ep->dwc_ep.is_in = (USB_DIR_IN & _desc->bEndpointAddress) != 0;
ep->dwc_ep.maxpacket = ep->ep.maxpacket;
ep->dwc_ep.type = _desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
if (ep->dwc_ep.is_in) {
if (!pcd->otg_dev->core_if->en_multiple_tx_fifo) {
ep->dwc_ep.tx_fifo_num = 0;
if (ep->dwc_ep.type == USB_ENDPOINT_XFER_ISOC) {
/*
* if ISOC EP then assign a Periodic Tx FIFO.
*/
ep->dwc_ep.tx_fifo_num =
assign_perio_tx_fifo(pcd->otg_dev->core_if);
}
} else {
/*
* if Dedicated FIFOs mode is on then assign a Tx FIFO.
*/
ep->dwc_ep.tx_fifo_num = assign_tx_fifo(pcd->otg_dev->core_if);
}
}
/* Set initial data PID. */
if (ep->dwc_ep.type == USB_ENDPOINT_XFER_BULK) {
ep->dwc_ep.data_pid_start = 0;
}
/* Alloc DMA Descriptors */
if (GET_CORE_IF(pcd)->dma_desc_enable) {
if (ep->dwc_ep.type != USB_ENDPOINT_XFER_ISOC) {
ep->dwc_ep.desc_addr = ep_alloc_desc(&ep->dwc_ep.dma_desc_addr);
}
}
DWC_DEBUGPL(DBG_PCD, "Activate %s-%s: type=%d, mps=%d desc=%p\n",
ep->ep.name, (ep->dwc_ep.is_in ? "IN" : "OUT"),
ep->dwc_ep.type, ep->dwc_ep.maxpacket, ep->desc);
dwc_otg_ep_activate(GET_CORE_IF(pcd), &ep->dwc_ep);
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
return 0;
}
/**
* This function is called when an EP is disabled due to disconnect or
* change in configuration. Any pending requests will terminate with a
* status of -ESHUTDOWN.
*
* This function modifies the dwc_otg_ep_t data structure for this EP,
* and then calls dwc_otg_ep_deactivate.
*/
static int dwc_otg_pcd_ep_disable(struct usb_ep *_ep)
{
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd = 0;
unsigned long flags;
dwc_otg_dma_desc_t *desc_addr;
uint32_t dma_desc_addr;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _ep);
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || !ep->desc) {
DWC_DEBUGPL(DBG_PCD, "%s, %s not enabled\n", __func__, _ep ? ep->ep.name : NULL);
return -EINVAL;
}
SPIN_LOCK_IRQSAVE(&ep->pcd->lock, flags);
request_nuke(ep);
dwc_otg_ep_deactivate(GET_CORE_IF(ep->pcd), &ep->dwc_ep);
ep->desc = 0;
ep->stopped = 1;
if (ep->dwc_ep.is_in) {
dwc_otg_flush_tx_fifo(GET_CORE_IF(ep->pcd), ep->dwc_ep.tx_fifo_num);
release_perio_tx_fifo(GET_CORE_IF(ep->pcd), ep->dwc_ep.tx_fifo_num);
release_tx_fifo(GET_CORE_IF(ep->pcd), ep->dwc_ep.tx_fifo_num);
}
/* Free DMA Descriptors */
pcd = ep->pcd;
if (GET_CORE_IF(pcd)->dma_desc_enable) {
if (ep->dwc_ep.type != USB_ENDPOINT_XFER_ISOC) {
desc_addr = ep->dwc_ep.desc_addr;
dma_desc_addr = ep->dwc_ep.dma_desc_addr;
/* Cannot call dma_free_coherent() with IRQs disabled */
SPIN_UNLOCK_IRQRESTORE(&ep->pcd->lock, flags);
ep_free_desc(desc_addr, dma_desc_addr);
goto out_unlocked;
}
}
SPIN_UNLOCK_IRQRESTORE(&ep->pcd->lock, flags);
out_unlocked:
DWC_DEBUGPL(DBG_PCD, "%s disabled\n", _ep->name);
return 0;
}
/**
* This function allocates a request object to use with the specified
* endpoint.
*
* @param _ep The endpoint to be used with with the request
* @param _gfp_flags the GFP_* flags to use.
*/
static struct usb_request *dwc_otg_pcd_alloc_request(struct usb_ep *_ep,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
int _gfp_flags
#else
gfp_t _gfp_flags
#endif
)
{
dwc_otg_pcd_request_t *req;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%d)\n", __func__, _ep, _gfp_flags);
if (0 == _ep) {
DWC_WARN("%s() %s\n", __func__, "Invalid EP!\n");
return 0;
}
req = kmalloc(sizeof(dwc_otg_pcd_request_t), _gfp_flags);
if (0 == req) {
DWC_WARN("%s() %s\n", __func__, "request allocation failed!\n");
return 0;
}
memset(req, 0, sizeof(dwc_otg_pcd_request_t));
req->req.dma = DMA_ADDR_INVALID;
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
/**
* This function frees a request object.
*
* @param _ep The endpoint associated with the request
* @param _req The request being freed
*/
static void dwc_otg_pcd_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
dwc_otg_pcd_request_t *req;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, _ep, _req);
if (0 == _ep || 0 == _req) {
DWC_WARN("%s() %s\n", __func__, "Invalid ep or req argument!\n");
return;
}
req = container_of(_req, dwc_otg_pcd_request_t, req);
kfree(req);
}
/**
* This function allocates an I/O buffer to be used for a transfer
* to/from the specified endpoint.
*
* @param _ep The endpoint to be used with with the request
* @param _bytes The desired number of bytes for the buffer
* @param _dma Pointer to the buffer's DMA address; must be valid
* @param _gfp_flags the GFP_* flags to use.
* @return address of a new buffer or null is buffer could not be allocated.
*/
static void *dwc_otg_pcd_alloc_buffer(struct usb_ep *_ep, unsigned _bytes, dma_addr_t * _dma,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
int _gfp_flags
#else
gfp_t _gfp_flags
#endif
)
{
void *buf;
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd = 0;
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
pcd = ep->pcd;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%d,%p,%0x)\n", __func__, _ep, _bytes, _dma, _gfp_flags);
/* Check dword alignment */
if ((_bytes & 0x3UL) != 0) {
DWC_WARN("%s() Buffer size is not a multiple of"
"DWORD size (%d)", __func__, _bytes);
}
if (GET_CORE_IF(pcd)->dma_enable) {
buf = dma_alloc_coherent(NULL, _bytes, _dma, _gfp_flags);
} else {
buf = kmalloc(_bytes, _gfp_flags);
}
/* Check dword alignment */
if (((int) buf & 0x3UL) != 0) {
DWC_WARN("%s() Buffer is not DWORD aligned (%p)", __func__, buf);
}
return buf;
}
/**
* This function frees an I/O buffer that was allocated by alloc_buffer.
*
* @param _ep the endpoint associated with the buffer
* @param _buf address of the buffer
* @param _dma The buffer's DMA address
* @param _bytes The number of bytes of the buffer
*/
static void dwc_otg_pcd_free_buffer(struct usb_ep *_ep, void *_buf,
dma_addr_t _dma, unsigned _bytes)
{
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd = 0;
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
pcd = ep->pcd;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p,%0x,%d)\n", __func__, _ep, _buf, _dma, _bytes);
if (GET_CORE_IF(pcd)->dma_enable) {
dma_free_coherent(NULL, _bytes, _buf, _dma);
} else {
kfree(_buf);
}
}
/**
* This function is used to submit an I/O Request to an EP.
*
* - When the request completes the request's completion callback
* is called to return the request to the driver.
* - An EP, except control EPs, may have multiple requests
* pending.
* - Once submitted the request cannot be examined or modified.
* - Each request is turned into one or more packets.
* - A BULK EP can queue any amount of data; the transfer is
* packetized.
* - Zero length Packets are specified with the request 'zero'
* flag.
*/
static int dwc_otg_pcd_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
int _gfp_flags
#else
gfp_t _gfp_flags
#endif
)
{
int prevented = 0;
dwc_otg_pcd_request_t *req;
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd;
unsigned long flags = 0;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p,%d)\n", __func__, _ep, _req, _gfp_flags);
req = container_of(_req, dwc_otg_pcd_request_t, req);
if (!_req || !_req->complete || !_req->buf || !list_empty(&req->queue)) {
DWC_WARN("%s, bad params\n", __func__);
return -EINVAL;
}
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || (!ep->desc && ep->dwc_ep.num != 0) /* || ep->stopped != 0 */ ) {
DWC_WARN("%s, bad ep\n", __func__);
return -EINVAL;
}
pcd = ep->pcd;
if (!pcd->driver || pcd->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n", pcd->gadget.speed);
DWC_WARN("%s, bogus device state\n", __func__);
return -ESHUTDOWN;
}
DWC_DEBUGPL(DBG_PCD, "%s queue req %p, len %d buf %p\n",
_ep->name, _req, _req->length, _req->buf);
if (!GET_CORE_IF(pcd)->core_params->opt) {
if (ep->dwc_ep.num != 0) {
DWC_ERROR("%s queue req %p, len %d buf %p\n",
_ep->name, _req, _req->length, _req->buf);
}
}
SPIN_LOCK_IRQSAVE(&ep->pcd->lock, flags);
#if defined(DEBUG) & defined(VERBOSE)
dump_msg(_req->buf, _req->length);
#endif
_req->status = -EINPROGRESS;
_req->actual = 0;
/*
* For EP0 IN without premature status, zlp is required?
*/
if (ep->dwc_ep.num == 0 && ep->dwc_ep.is_in) {
DWC_DEBUGPL(DBG_PCDV, "%s-OUT ZLP\n", _ep->name);
//_req->zero = 1;
}
/* Start the transfer */
if (list_empty(&ep->queue) && !ep->stopped) {
/* EP0 Transfer? */
if (ep->dwc_ep.num == 0) {
switch (pcd->ep0state) {
case EP0_IN_DATA_PHASE:
DWC_DEBUGPL(DBG_PCD, "%s ep0: EP0_IN_DATA_PHASE\n", __func__);
break;
case EP0_OUT_DATA_PHASE:
DWC_DEBUGPL(DBG_PCD, "%s ep0: EP0_OUT_DATA_PHASE\n", __func__);
if (pcd->request_config) {
/* Complete STATUS PHASE */
ep->dwc_ep.is_in = 1;
pcd->ep0state = EP0_IN_STATUS_PHASE;
}
break;
case EP0_IN_STATUS_PHASE:
DWC_DEBUGPL(DBG_PCD, "%s ep0: EP0_IN_STATUS_PHASE\n", __func__);
break;
default:
DWC_DEBUGPL(DBG_ANY, "ep0: odd state %d\n", pcd->ep0state);
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
return -EL2HLT;
}
ep->dwc_ep.dma_addr = _req->dma;
ep->dwc_ep.start_xfer_buff = _req->buf;
ep->dwc_ep.xfer_buff = _req->buf;
ep->dwc_ep.xfer_len = _req->length;
ep->dwc_ep.xfer_count = 0;
ep->dwc_ep.sent_zlp = 0;
ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
if (_req->zero) {
if ((ep->dwc_ep.xfer_len % ep->dwc_ep.maxpacket == 0)
&& (ep->dwc_ep.xfer_len != 0)) {
ep->dwc_ep.sent_zlp = 1;
}
}
dwc_otg_ep0_start_transfer(GET_CORE_IF(pcd), &ep->dwc_ep);
} else {
/* Setup and start the Transfer */
ep->dwc_ep.dma_addr = _req->dma;
ep->dwc_ep.start_xfer_buff = _req->buf;
ep->dwc_ep.xfer_buff = _req->buf;
ep->dwc_ep.xfer_len = _req->length;
ep->dwc_ep.xfer_count = 0;
ep->dwc_ep.sent_zlp = 0;
ep->dwc_ep.total_len = ep->dwc_ep.xfer_len;
if (_req->zero) {
if ((ep->dwc_ep.xfer_len % ep->dwc_ep.maxpacket == 0)
&& (ep->dwc_ep.xfer_len != 0)) {
ep->dwc_ep.sent_zlp = 1;
}
}
dwc_otg_ep_start_transfer(GET_CORE_IF(pcd), &ep->dwc_ep);
}
}
if ((req != 0) || prevented) {
++pcd->request_pending;
list_add_tail(&req->queue, &ep->queue);
if (ep->dwc_ep.is_in && ep->stopped && !(GET_CORE_IF(pcd)->dma_enable)) {
/** @todo NGS Create a function for this. */
diepmsk_data_t diepmsk = {.d32 = 0 };
diepmsk.b.intktxfemp = 1;
dwc_modify_reg32(&GET_CORE_IF(pcd)->dev_if->dev_global_regs->diepmsk, 0,
diepmsk.d32);
}
}
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
return 0;
}
/**
* This function cancels an I/O request from an EP.
*/
static int dwc_otg_pcd_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
dwc_otg_pcd_request_t *req;
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd;
unsigned long flags;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p)\n", __func__, _ep, _req);
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || !_req || (!ep->desc && ep->dwc_ep.num != 0)) {
DWC_WARN("%s, bad argument\n", __func__);
return -EINVAL;
}
pcd = ep->pcd;
if (!pcd->driver || pcd->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_WARN("%s, bogus device state\n", __func__);
return -ESHUTDOWN;
}
SPIN_LOCK_IRQSAVE(&pcd->lock, flags);
DWC_DEBUGPL(DBG_PCDV, "%s %s %s %p\n", __func__, _ep->name,
ep->dwc_ep.is_in ? "IN" : "OUT", _req);
/* 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(&pcd->lock, flags);
return -EINVAL;
}
if (!list_empty(&req->queue)) {
request_done(ep, req, -ECONNRESET);
} else {
req = 0;
}
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
return req ? 0 : -EOPNOTSUPP;
}
/**
* usb_ep_set_halt stalls an endpoint.
*
* usb_ep_clear_halt clears an endpoint halt and resets its data
* toggle.
*
* Both of these functions are implemented with the same underlying
* function. The behavior depends on the value argument.
*
* @param[in] _ep the Endpoint to halt or clear halt.
* @param[in] _value
* - 0 means clear_halt.
* - 1 means set_halt,
* - 2 means clear stall lock flag.
* - 3 means set stall lock flag.
*/
static int dwc_otg_pcd_ep_set_halt(struct usb_ep *_ep, int _value)
{
int retval = 0;
unsigned long flags;
dwc_otg_pcd_ep_t *ep = 0;
DWC_DEBUGPL(DBG_PCD, "HALT %s %d\n", _ep->name, _value);
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || (!ep->desc && ep != &ep->pcd->ep0) ||
ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
DWC_WARN("%s, bad ep\n", __func__);
return -EINVAL;
}
SPIN_LOCK_IRQSAVE(&ep->pcd->lock, flags);
if (!list_empty(&ep->queue)) {
DWC_WARN("%s() %s XFer In process\n", __func__, _ep->name);
retval = -EAGAIN;
} else if (_value == 0) {
dwc_otg_ep_clear_stall(ep->pcd->otg_dev->core_if, &ep->dwc_ep);
} else if (_value == 1) {
if (ep->dwc_ep.is_in == 1 && ep->pcd->otg_dev->core_if->dma_desc_enable) {
dtxfsts_data_t txstatus;
fifosize_data_t txfifosize;
txfifosize.d32 =
dwc_read_reg32(&ep->pcd->otg_dev->core_if->core_global_regs->
dptxfsiz_dieptxf[ep->dwc_ep.tx_fifo_num]);
txstatus.d32 =
dwc_read_reg32(&ep->pcd->otg_dev->core_if->dev_if->
in_ep_regs[ep->dwc_ep.num]->dtxfsts);
if (txstatus.b.txfspcavail < txfifosize.b.depth) {
DWC_WARN("%s() %s Data In Tx Fifo\n", __func__, _ep->name);
retval = -EAGAIN;
} else {
if (ep->dwc_ep.num == 0) {
ep->pcd->ep0state = EP0_STALL;
}
ep->stopped = 1;
dwc_otg_ep_set_stall(ep->pcd->otg_dev->core_if, &ep->dwc_ep);
}
} else {
if (ep->dwc_ep.num == 0) {
ep->pcd->ep0state = EP0_STALL;
}
ep->stopped = 1;
dwc_otg_ep_set_stall(ep->pcd->otg_dev->core_if, &ep->dwc_ep);
}
} else if (_value == 2) {
ep->dwc_ep.stall_clear_flag = 0;
} else if (_value == 3) {
ep->dwc_ep.stall_clear_flag = 1;
}
SPIN_UNLOCK_IRQRESTORE(&ep->pcd->lock, flags);
return retval;
}
#ifdef _EN_ISOC_
/**
* This function is used to submit an ISOC Transfer Request to an EP.
*
* - Every time a sync period completes the request's completion callback
* is called to provide data to the gadget driver.
* - Once submitted the request cannot be modified.
* - Each request is turned into periodic data packets untill ISO
* Transfer is stopped..
*/
static int dwc_otg_pcd_iso_ep_start(struct usb_ep *_ep, struct usb_iso_request *_req,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
int _gfp_flags
#else
gfp_t _gfp_flags
#endif
)
{
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd;
dwc_ep_t *dwc_ep;
dsts_data_t dsts = {.d32 = 0 };
depctl_data_t depctl = {.d32 = 0 };
volatile uint32_t *addr;
unsigned long flags = 0;
int32_t frm_data;
int i, j;
dwc_otg_core_if_t *core_if;
dctl_data_t dctl;
dcfg_data_t dcfg;
if (!_req || !_req->process_buffer || !_req->buf0 || !_req->buf1) {
DWC_WARN("%s, bad params\n", __func__);
return -EINVAL;
}
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || !ep->desc || ep->dwc_ep.num == 0) {
DWC_WARN("%s, bad ep\n", __func__);
return -EINVAL;
}
pcd = ep->pcd;
core_if = GET_CORE_IF(pcd);
dctl.d32 = dwc_read_reg32(&core_if->dev_if->dev_global_regs->dctl);
dctl.b.ifrmnum = 1;
//dwc_write_reg32(&core_if->dev_if->dev_global_regs->dctl,dctl.d32);
dcfg.d32 = dwc_read_reg32(&core_if->dev_if->dev_global_regs->dcfg);
if (!pcd->driver || pcd->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n", pcd->gadget.speed);
DWC_WARN("%s, bogus device state\n", __func__);
return -ESHUTDOWN;
}
SPIN_LOCK_IRQSAVE(&ep->pcd->lock, flags);
dwc_ep = &ep->dwc_ep;
_req->status = -EINPROGRESS;
dwc_ep->dma_addr0 = _req->dma0;
dwc_ep->dma_addr1 = _req->dma1;
dwc_ep->xfer_buff0 = _req->buf0;
dwc_ep->xfer_buff1 = _req->buf1;
ep->iso_req = _req;
dwc_ep->data_per_frame = _req->data_per_frame;
/* todo - pattern data support is to be implemented in the future */
dwc_ep->data_pattern_frame = _req->data_pattern_frame;
dwc_ep->sync_frame = _req->sync_frame;
dwc_ep->buf_proc_intrvl = _req->buf_proc_intrvl;
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
dwc_ep->bInterval = 1 << (ep->desc->bInterval - 1);
dwc_ep->proc_buf_num = 0;
dwc_ep->pkt_per_frm = 0;
frm_data = ep->dwc_ep.data_per_frame;
while (frm_data > 0) {
dwc_ep->pkt_per_frm++;
frm_data -= ep->dwc_ep.maxpacket;
}
if (dwc_ep->is_in)
dwc_ep->desc_cnt = dwc_ep->buf_proc_intrvl / dwc_ep->bInterval;
else
dwc_ep->desc_cnt =
dwc_ep->buf_proc_intrvl * dwc_ep->pkt_per_frm / dwc_ep->bInterval;
/** Allocate descriptors for double buffering */
dwc_ep->iso_desc_addr =
ep_alloc_iso_desc_chain(&dwc_ep->iso_dma_desc_addr, dwc_ep->desc_cnt * 2);
dsts.d32 = dwc_read_reg32(&(GET_CORE_IF(pcd)->dev_if->dev_global_regs->dsts));
if (dwc_ep->is_in == 0) {
/** ISO OUT EP */
iso_out_sts_data_t sts = {.d32 = 0 };
dwc_otg_iso_dma_desc_t *dma_desc = dwc_ep->iso_desc_addr;
dma_addr_t dma_ad;
uint32_t data_per_desc;
dwc_otg_dev_out_ep_regs_t *out_regs = core_if->dev_if->out_ep_regs[dwc_ep->num];
addr = &GET_CORE_IF(pcd)->dev_if->out_ep_regs[dwc_ep->num]->doepctl;
dma_ad = (dma_addr_t) dwc_read_reg32(&(out_regs->doepdma));
/** Buffer 0 descriptors setup */
dma_ad = dwc_ep->dma_addr0;
sts.b.bs = BS_HOST_READY; //0
sts.b.rxsts = 0;
sts.b.l = 0;
sts.b.sp = 0;
sts.b.ioc = 0;
sts.b.pid = 0;
sts.b.framenum = 0;
for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm; i += dwc_ep->pkt_per_frm) {
for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
data_per_desc =
((j + 1) * dwc_ep->maxpacket >
dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += data_per_desc;
}
}
for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
data_per_desc = ((j + 1) * dwc_ep->maxpacket > dwc_ep->data_per_frame) ?
dwc_ep->data_per_frame - j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += data_per_desc;
}
sts.b.ioc = 1;
data_per_desc = ((j + 1) * dwc_ep->maxpacket > dwc_ep->data_per_frame) ?
dwc_ep->data_per_frame - j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
/** Buffer 1 descriptors setup */
sts.b.ioc = 0;
dma_ad = dwc_ep->dma_addr1;
for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm; i += dwc_ep->pkt_per_frm) {
for (j = 0; j < dwc_ep->pkt_per_frm; ++j) {
data_per_desc =
((j + 1) * dwc_ep->maxpacket >
dwc_ep->data_per_frame) ? dwc_ep->data_per_frame -
j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += data_per_desc;
}
}
for (j = 0; j < dwc_ep->pkt_per_frm - 1; ++j) {
data_per_desc = ((j + 1) * dwc_ep->maxpacket > dwc_ep->data_per_frame) ?
dwc_ep->data_per_frame - j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += data_per_desc;
}
sts.b.ioc = 1;
sts.b.l = 1;
data_per_desc = ((j + 1) * dwc_ep->maxpacket > dwc_ep->data_per_frame) ?
dwc_ep->data_per_frame - j * dwc_ep->maxpacket : dwc_ep->maxpacket;
sts.b.rxbytes = data_per_desc;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dwc_ep->next_frame = 0;
/** Write dma_ad into DOEPDMA register */
dwc_write_reg32(&(out_regs->doepdma), (uint32_t) dwc_ep->iso_dma_desc_addr);
} else {
/** ISO IN EP */
iso_in_sts_data_t sts = {.d32 = 0 };
dwc_otg_iso_dma_desc_t *dma_desc = dwc_ep->iso_desc_addr;
dma_addr_t dma_ad;
dwc_otg_dev_in_ep_regs_t *in_regs = core_if->dev_if->in_ep_regs[dwc_ep->num];
unsigned int frmnumber;
fifosize_data_t txfifosize, rxfifosize;
txfifosize.d32 = dwc_read_reg32(&core_if->dev_if->in_ep_regs[dwc_ep->num]->dtxfsts);
rxfifosize.d32 = dwc_read_reg32(&core_if->core_global_regs->grxfsiz);
addr = &GET_CORE_IF(pcd)->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
dma_ad = dwc_ep->dma_addr0;
dsts.d32 = dwc_read_reg32(&(GET_CORE_IF(pcd)->dev_if->dev_global_regs->dsts));
sts.b.bs = BS_HOST_READY;
sts.b.txsts = 0;
sts.b.sp = (dwc_ep->data_per_frame % dwc_ep->maxpacket) ? 1 : 0;
sts.b.ioc = 0;
sts.b.pid = dwc_ep->pkt_per_frm;
if (_req->flags & USB_REQ_ISO_ASAP) {
frmnumber = dsts.b.soffn + 1;
if (dwc_ep->bInterval != 1) {
frmnumber =
frmnumber + (dwc_ep->bInterval - 1 -
frmnumber % dwc_ep->bInterval);
}
} else {
frmnumber = _req->start_frame;
}
sts.b.framenum = frmnumber;
sts.b.txbytes = dwc_ep->data_per_frame;
sts.b.l = 0;
/** Buffer 0 descriptors setup */
for (i = 0; i < dwc_ep->desc_cnt - 1; i++) {
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += dwc_ep->data_per_frame;
sts.b.framenum += dwc_ep->bInterval;
}
sts.b.ioc = 1;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
++dma_desc;
/** Buffer 1 descriptors setup */
sts.b.ioc = 0;
dma_ad = dwc_ep->dma_addr1;
for (i = 0; i < dwc_ep->desc_cnt - dwc_ep->pkt_per_frm; i += dwc_ep->pkt_per_frm) {
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dma_desc++;
(uint32_t) dma_ad += dwc_ep->data_per_frame;
sts.b.framenum += dwc_ep->bInterval;
sts.b.ioc = 0;
}
sts.b.ioc = 1;
sts.b.l = 1;
writel((uint32_t) dma_ad, &dma_desc->buf);
writel(sts.d32, &dma_desc->status);
dwc_ep->next_frame = sts.b.framenum + dwc_ep->bInterval;
/** Write dma_ad into diepdma register */
dwc_write_reg32(&(in_regs->diepdma), (uint32_t) dwc_ep->iso_dma_desc_addr);
}
/** Enable endpoint, clear nak */
depctl.d32 = 0;
depctl.b.epena = 1;
depctl.b.usbactep = 1;
depctl.b.cnak = 1;
dwc_modify_reg32(addr, depctl.d32, depctl.d32);
depctl.d32 = dwc_read_reg32(addr);
return 0;
}
/**
* This function stops ISO EP Periodic Data Transfer.
*/
static int dwc_otg_pcd_iso_ep_stop(struct usb_ep *_ep, struct usb_iso_request *_iso_req)
{
dwc_otg_pcd_ep_t *ep;
dwc_otg_pcd_t *pcd;
dwc_ep_t *dwc_ep;
unsigned long flags;
depctl_data_t depctl = {.d32 = 0 };
volatile uint32_t *addr;
ep = container_of(_ep, dwc_otg_pcd_ep_t, ep);
if (!_ep || !ep->desc || ep->dwc_ep.num == 0) {
DWC_WARN("%s, bad ep\n", __func__);
return -EINVAL;
}
pcd = ep->pcd;
if (!pcd->driver || pcd->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n", pcd->gadget.speed);
DWC_WARN("%s, bogus device state\n", __func__);
return -ESHUTDOWN;
}
dwc_ep = &ep->dwc_ep;
SPIN_LOCK_IRQSAVE(&pcd->lock, flags);
if (ep->iso_req != _iso_req) {
return -EINVAL;
}
_iso_req->status = -ECONNRESET;
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
if (ep->dwc_ep.is_in == 1) {
addr = &GET_CORE_IF(pcd)->dev_if->in_ep_regs[dwc_ep->num]->diepctl;
} else {
addr = &GET_CORE_IF(pcd)->dev_if->out_ep_regs[dwc_ep->num]->doepctl;
}
depctl.d32 = dwc_read_reg32(addr);
dwc_write_reg32(addr, depctl.d32);
ep_free_iso_desc_chain(ep->dwc_ep.iso_desc_addr, ep->dwc_ep.iso_dma_desc_addr,
ep->dwc_ep.desc_cnt * 2);
/* reset varibales */
dwc_ep->dma_addr0 = 0;
dwc_ep->dma_addr1 = 0;
dwc_ep->xfer_buff0 = 0;
dwc_ep->xfer_buff1 = 0;
dwc_ep->data_per_frame = 0;
dwc_ep->data_pattern_frame = 0;
dwc_ep->sync_frame = 0;
dwc_ep->buf_proc_intrvl = 0;
dwc_ep->bInterval = 0;
dwc_ep->proc_buf_num = 0;
dwc_ep->pkt_per_frm = 0;
dwc_ep->pkt_per_frm = 0;
dwc_ep->desc_cnt = 0;
dwc_ep->iso_desc_addr = 0;
dwc_ep->iso_dma_desc_addr = 0;
return 0;
}
static struct usb_iso_request *dwc_otg_pcd_alloc_iso_request(struct usb_ep *_ep, int packets,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
int gfp_flags
#else
gfp_t gfp_flags
#endif
)
{
struct usb_iso_request *pReq = NULL;
uint32_t req_size;
req_size = sizeof(struct usb_iso_request);
req_size += (2 * packets * (sizeof(struct usb_gadget_iso_packet_descriptor)));
pReq = kmalloc(req_size, gfp_flags);
pReq->iso_packet_desc0 = (void *) (pReq + 1);
pReq->iso_packet_desc1 = pReq->iso_packet_desc0 + packets;
return pReq;
}
static void dwc_otg_pcd_free_iso_request(struct usb_ep *_ep, struct usb_iso_request *req)
{
kfree(req);
}
static struct usb_isoc_ep_ops dwc_otg_pcd_ep_ops = {
.ep_ops = {
.enable = dwc_otg_pcd_ep_enable,
.disable = dwc_otg_pcd_ep_disable,
.alloc_request = dwc_otg_pcd_alloc_request,
.free_request = dwc_otg_pcd_free_request,
.alloc_buffer = dwc_otg_pcd_alloc_buffer,
.free_buffer = dwc_otg_pcd_free_buffer,
.queue = dwc_otg_pcd_ep_queue,
.dequeue = dwc_otg_pcd_ep_dequeue,
.set_halt = dwc_otg_pcd_ep_set_halt,
.fifo_status = 0,
.fifo_flush = 0,
},
.iso_ep_start = dwc_otg_pcd_iso_ep_start,
.iso_ep_stop = dwc_otg_pcd_iso_ep_stop,
.alloc_iso_request = dwc_otg_pcd_alloc_iso_request,
.free_iso_request = dwc_otg_pcd_free_iso_request,
};
#else
static struct usb_ep_ops dwc_otg_pcd_ep_ops = {
.enable = dwc_otg_pcd_ep_enable,
.disable = dwc_otg_pcd_ep_disable,
.alloc_request = dwc_otg_pcd_alloc_request,
.free_request = dwc_otg_pcd_free_request,
.alloc_buffer = dwc_otg_pcd_alloc_buffer,
.free_buffer = dwc_otg_pcd_free_buffer,
.queue = dwc_otg_pcd_ep_queue,
.dequeue = dwc_otg_pcd_ep_dequeue,
.set_halt = dwc_otg_pcd_ep_set_halt,
.fifo_status = 0,
.fifo_flush = 0,
};
#endif /* _EN_ISOC_ */
/* Gadget Operations */
/**
* The following gadget operations will be implemented in the DWC_otg
* PCD. Functions in the API that are not described below are not
* implemented.
*
* The Gadget API provides wrapper functions for each of the function
* pointers defined in usb_gadget_ops. The Gadget Driver calls the
* wrapper function, which then calls the underlying PCD function. The
* following sections are named according to the wrapper functions
* (except for ioctl, which doesn't have a wrapper function). Within
* each section, the corresponding DWC_otg PCD function name is
* specified.
*
*/
/**
*Gets the USB Frame number of the last SOF.
*/
static int dwc_otg_pcd_get_frame(struct usb_gadget *_gadget)
{
dwc_otg_pcd_t *pcd;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _gadget);
if (_gadget == 0) {
return -ENODEV;
} else {
pcd = container_of(_gadget, dwc_otg_pcd_t, gadget);
dwc_otg_get_frame_number(GET_CORE_IF(pcd));
}
return 0;
}
void dwc_otg_pcd_initiate_srp(dwc_otg_pcd_t * _pcd)
{
uint32_t *addr = (uint32_t *) & (GET_CORE_IF(_pcd)->core_global_regs->gotgctl);
gotgctl_data_t mem;
gotgctl_data_t val;
val.d32 = dwc_read_reg32(addr);
if (val.b.sesreq) {
DWC_ERROR("Session Request Already active!\n");
return;
}
DWC_NOTICE("Session Request Initated\n");
mem.d32 = dwc_read_reg32(addr);
mem.b.sesreq = 1;
dwc_write_reg32(addr, mem.d32);
/* Start the SRP timer */
dwc_otg_pcd_start_srp_timer(_pcd);
return;
}
void dwc_otg_pcd_remote_wakeup(dwc_otg_pcd_t * _pcd, int set)
{
dctl_data_t dctl = {.d32 = 0 };
volatile uint32_t *addr = &(GET_CORE_IF(_pcd)->dev_if->dev_global_regs->dctl);
if (dwc_otg_is_device_mode(GET_CORE_IF(_pcd))) {
if (_pcd->remote_wakeup_enable) {
if (set) {
dctl.b.rmtwkupsig = 1;
dwc_modify_reg32(addr, 0, dctl.d32);
DWC_DEBUGPL(DBG_PCD, "Set Remote Wakeup\n");
mdelay(1);
dwc_modify_reg32(addr, dctl.d32, 0);
DWC_DEBUGPL(DBG_PCD, "Clear Remote Wakeup\n");
} else {
}
} else {
DWC_DEBUGPL(DBG_PCD, "Remote Wakeup is disabled\n");
}
}
return;
}
/**
* Initiates Session Request Protocol (SRP) to wakeup the host if no
* session is in progress. If a session is already in progress, but
* the device is suspended, remote wakeup signaling is started.
*
*/
static int dwc_otg_pcd_wakeup(struct usb_gadget *_gadget)
{
unsigned long flags;
dwc_otg_pcd_t *pcd;
dsts_data_t dsts;
gotgctl_data_t gotgctl;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _gadget);
if (_gadget == 0) {
return -ENODEV;
} else {
pcd = container_of(_gadget, dwc_otg_pcd_t, gadget);
}
SPIN_LOCK_IRQSAVE(&pcd->lock, flags);
/*
* This function starts the Protocol if no session is in progress. If
* a session is already in progress, but the device is suspended,
* remote wakeup signaling is started.
*/
/* Check if valid session */
gotgctl.d32 = dwc_read_reg32(&(GET_CORE_IF(pcd)->core_global_regs->gotgctl));
if (gotgctl.b.bsesvld) {
/* Check if suspend state */
dsts.d32 = dwc_read_reg32(&(GET_CORE_IF(pcd)->dev_if->dev_global_regs->dsts));
if (dsts.b.suspsts) {
dwc_otg_pcd_remote_wakeup(pcd, 1);
}
} else {
dwc_otg_pcd_initiate_srp(pcd);
}
SPIN_UNLOCK_IRQRESTORE(&pcd->lock, flags);
return 0;
}
static const struct usb_gadget_ops dwc_otg_pcd_ops = {
.get_frame = dwc_otg_pcd_get_frame,
.wakeup = dwc_otg_pcd_wakeup,
// current versions must always be self-powered
};
/**
* This function updates the otg values in the gadget structure.
*/
void dwc_otg_pcd_update_otg(dwc_otg_pcd_t * _pcd, const unsigned _reset)
{
if (!_pcd->gadget.is_otg)
return;
if (_reset) {
_pcd->b_hnp_enable = 0;
_pcd->a_hnp_support = 0;
_pcd->a_alt_hnp_support = 0;
}
_pcd->gadget.b_hnp_enable = _pcd->b_hnp_enable;
_pcd->gadget.a_hnp_support = _pcd->a_hnp_support;
_pcd->gadget.a_alt_hnp_support = _pcd->a_alt_hnp_support;
}
/**
* This function is the top level PCD interrupt handler.
*/
static irqreturn_t dwc_otg_pcd_irq(int _irq, void *_dev
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
, struct pt_regs *_r
#endif
)
{
dwc_otg_pcd_t *pcd = _dev;
int32_t retval = IRQ_NONE;
retval = dwc_otg_pcd_handle_intr(pcd);
return IRQ_RETVAL(retval);
}
/**
* PCD Callback function for initializing the PCD when switching to
* device mode.
*
* @param _p void pointer to the <code>dwc_otg_pcd_t</code>
*/
static int32_t dwc_otg_pcd_start_cb(void *_p)
{
dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) _p;
/*
* Initialized the Core for Device mode.
*/
if (dwc_otg_is_device_mode(GET_CORE_IF(pcd))) {
dwc_otg_core_dev_init(GET_CORE_IF(pcd));
}
return 1;
}
/**
* PCD Callback function for stopping the PCD when switching to Host
* mode.
*
* @param _p void pointer to the <code>dwc_otg_pcd_t</code>
*/
static int32_t dwc_otg_pcd_stop_cb(void *_p)
{
dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) _p;
extern void dwc_otg_pcd_stop(dwc_otg_pcd_t * _pcd);
dwc_otg_pcd_stop(pcd);
return 1;
}
/**
* PCD Callback function for notifying the PCD when resuming from
* suspend.
*
* @param _p void pointer to the <code>dwc_otg_pcd_t</code>
*/
static int32_t dwc_otg_pcd_suspend_cb(void *_p)
{
dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) _p;
if (pcd->driver && pcd->driver->resume) {
SPIN_UNLOCK(&pcd->lock);
pcd->driver->suspend(&pcd->gadget);
SPIN_LOCK(&pcd->lock);
}
return 1;
}
/**
* PCD Callback function for notifying the PCD when resuming from
* suspend.
*
* @param _p void pointer to the <code>dwc_otg_pcd_t</code>
*/
static int32_t dwc_otg_pcd_resume_cb(void *_p)
{
dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) _p;
if (pcd->driver && pcd->driver->resume) {
SPIN_UNLOCK(&pcd->lock);
pcd->driver->resume(&pcd->gadget);
SPIN_LOCK(&pcd->lock);
}
/* Stop the SRP timeout timer. */
if ((GET_CORE_IF(pcd)->core_params->phy_type != DWC_PHY_TYPE_PARAM_FS) ||
(!GET_CORE_IF(pcd)->core_params->i2c_enable)) {
if (GET_CORE_IF(pcd)->srp_timer_started) {
GET_CORE_IF(pcd)->srp_timer_started = 0;
del_timer(&pcd->srp_timer);
}
}
return 1;
}
/**
* PCD Callback structure for handling mode switching.
*/
static dwc_otg_cil_callbacks_t pcd_callbacks = {
.start = dwc_otg_pcd_start_cb,
.stop = dwc_otg_pcd_stop_cb,
.suspend = dwc_otg_pcd_suspend_cb,
.resume_wakeup = dwc_otg_pcd_resume_cb,
.p = 0, /* Set at registration */
};
/**
* This function is called when the SRP timer expires. The SRP should
* complete within 6 seconds.
*/
static void srp_timeout(unsigned long _ptr)
{
gotgctl_data_t gotgctl;
dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) _ptr;
volatile uint32_t *addr = &core_if->core_global_regs->gotgctl;
gotgctl.d32 = dwc_read_reg32(addr);
core_if->srp_timer_started = 0;
if ((core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS) &&
(core_if->core_params->i2c_enable)) {
DWC_PRINT("SRP Timeout\n");
if ((core_if->srp_success) && (gotgctl.b.bsesvld)) {
if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
}
/* Clear Session Request */
gotgctl.d32 = 0;
gotgctl.b.sesreq = 1;
dwc_modify_reg32(&core_if->core_global_regs->gotgctl, gotgctl.d32, 0);
core_if->srp_success = 0;
} else {
DWC_ERROR("Device not connected/responding\n");
gotgctl.b.sesreq = 0;
dwc_write_reg32(addr, gotgctl.d32);
}
} else if (gotgctl.b.sesreq) {
DWC_PRINT("SRP Timeout\n");
DWC_ERROR("Device not connected/responding\n");
gotgctl.b.sesreq = 0;
dwc_write_reg32(addr, gotgctl.d32);
} else {
DWC_PRINT(" SRP GOTGCTL=%0x\n", gotgctl.d32);
}
}
/**
* Start the SRP timer to detect when the SRP does not complete within
* 6 seconds.
*
* @param _pcd the pcd structure.
*/
void dwc_otg_pcd_start_srp_timer(dwc_otg_pcd_t * _pcd)
{
struct timer_list *srp_timer = &_pcd->srp_timer;
GET_CORE_IF(_pcd)->srp_timer_started = 1;
init_timer(srp_timer);
srp_timer->function = srp_timeout;
srp_timer->data = (unsigned long) GET_CORE_IF(_pcd);
srp_timer->expires = jiffies + (HZ * 6);
add_timer(srp_timer);
}
/**
* Tasklet
*
*/
extern void start_next_request(dwc_otg_pcd_ep_t * _ep);
static void start_xfer_tasklet_func(unsigned long data)
{
dwc_otg_pcd_t *pcd = (dwc_otg_pcd_t *) data;
dwc_otg_core_if_t *core_if = pcd->otg_dev->core_if;
int i;
depctl_data_t diepctl;
DWC_DEBUGPL(DBG_PCDV, "Start xfer tasklet\n");
diepctl.d32 = dwc_read_reg32(&core_if->dev_if->in_ep_regs[0]->diepctl);
if (pcd->ep0.queue_sof) {
pcd->ep0.queue_sof = 0;
start_next_request(&pcd->ep0);
// break;
}
for (i = 0; i < core_if->dev_if->num_in_eps; i++) {
depctl_data_t diepctl;
diepctl.d32 = dwc_read_reg32(&core_if->dev_if->in_ep_regs[i]->diepctl);
if (pcd->in_ep[i].queue_sof) {
pcd->in_ep[i].queue_sof = 0;
start_next_request(&pcd->in_ep[i]);
// break;
}
}
return;
}
static struct tasklet_struct start_xfer_tasklet = {
.next = NULL,
.state = 0,
.count = ATOMIC_INIT(0),
.func = start_xfer_tasklet_func,
.data = 0,
};
/**
* This function initialized the pcd Dp structures to there default
* state.
*
* @param _pcd the pcd structure.
*/
void dwc_otg_pcd_reinit(dwc_otg_pcd_t * _pcd)
{
static const char *names[] = {
"ep0",
"ep1in",
"ep2in",
"ep3in",
"ep4in",
"ep5in",
"ep6in",
"ep7in",
"ep8in",
"ep9in",
"ep10in",
"ep11in",
"ep12in",
"ep13in",
"ep14in",
"ep15in",
"ep1out",
"ep2out",
"ep3out",
"ep4out",
"ep5out",
"ep6out",
"ep7out",
"ep8out",
"ep9out",
"ep10out",
"ep11out",
"ep12out",
"ep13out",
"ep14out",
"ep15out"
};
int i;
int in_ep_cntr, out_ep_cntr;
uint32_t hwcfg1;
uint32_t num_in_eps = (GET_CORE_IF(_pcd))->dev_if->num_in_eps;
uint32_t num_out_eps = (GET_CORE_IF(_pcd))->dev_if->num_out_eps;
dwc_otg_pcd_ep_t *ep;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _pcd);
INIT_LIST_HEAD(&_pcd->gadget.ep_list);
_pcd->gadget.ep0 = &_pcd->ep0.ep;
_pcd->gadget.speed = USB_SPEED_UNKNOWN;
INIT_LIST_HEAD(&_pcd->gadget.ep0->ep_list);
/**
* Initialize the EP0 structure.
*/
ep = &_pcd->ep0;
/* Init EP structure */
ep->desc = 0;
ep->pcd = _pcd;
ep->stopped = 1;
/* Init DWC ep structure */
ep->dwc_ep.num = 0;
ep->dwc_ep.active = 0;
ep->dwc_ep.tx_fifo_num = 0;
/* Control until ep is actvated */
ep->dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
ep->dwc_ep.maxpacket = MAX_PACKET_SIZE;
ep->dwc_ep.dma_addr = 0;
ep->dwc_ep.start_xfer_buff = 0;
ep->dwc_ep.xfer_buff = 0;
ep->dwc_ep.xfer_len = 0;
ep->dwc_ep.xfer_count = 0;
ep->dwc_ep.sent_zlp = 0;
ep->dwc_ep.total_len = 0;
ep->queue_sof = 0;
/* Init the usb_ep structure. */
ep->ep.name = names[0];
ep->ep.ops = (struct usb_ep_ops *) &dwc_otg_pcd_ep_ops;
/**
* @todo NGS: What should the max packet size be set to
* here? Before EP type is set?
*/
ep->ep.maxpacket = MAX_PACKET_SIZE;
list_add_tail(&ep->ep.ep_list, &_pcd->gadget.ep_list);
INIT_LIST_HEAD(&ep->queue);
/**
* Initialize the EP structures.
*/
in_ep_cntr = 0;
hwcfg1 = (GET_CORE_IF(_pcd))->hwcfg1.d32 >> 3;
for (i = 1; in_ep_cntr < num_in_eps; i++) {
if ((hwcfg1 & 0x1) == 0) {
dwc_otg_pcd_ep_t *ep = &_pcd->in_ep[in_ep_cntr];
in_ep_cntr++;
/* Init EP structure */
ep->desc = 0;
ep->pcd = _pcd;
ep->stopped = 1;
/* Init DWC ep structure */
ep->dwc_ep.is_in = 1;
ep->dwc_ep.num = i;
ep->dwc_ep.active = 0;
ep->dwc_ep.tx_fifo_num = 0;
/* Control until ep is actvated */
ep->dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
ep->dwc_ep.maxpacket = MAX_PACKET_SIZE;
ep->dwc_ep.dma_addr = 0;
ep->dwc_ep.start_xfer_buff = 0;
ep->dwc_ep.xfer_buff = 0;
ep->dwc_ep.xfer_len = 0;
ep->dwc_ep.xfer_count = 0;
ep->dwc_ep.sent_zlp = 0;
ep->dwc_ep.total_len = 0;
ep->queue_sof = 0;
/* Init the usb_ep structure. */
/**
* @todo NGS: Add direction to EP, based on contents
* of HWCFG1. Need a copy of HWCFG1 in pcd structure?
* sprintf( ";r
*/
ep->ep.name = names[i];
ep->ep.ops = (struct usb_ep_ops *) &dwc_otg_pcd_ep_ops;
/**
* @todo NGS: What should the max packet size be set to
* here? Before EP type is set?
*/
ep->ep.maxpacket = MAX_PACKET_SIZE;
list_add_tail(&ep->ep.ep_list, &_pcd->gadget.ep_list);
INIT_LIST_HEAD(&ep->queue);
}
hwcfg1 >>= 2;
}
out_ep_cntr = 0;
hwcfg1 = (GET_CORE_IF(_pcd))->hwcfg1.d32 >> 2;
for (i = 1; out_ep_cntr < num_out_eps; i++) {
if ((hwcfg1 & 0x1) == 0) {
dwc_otg_pcd_ep_t *ep = &_pcd->out_ep[out_ep_cntr];
out_ep_cntr++;
/* Init EP structure */
ep->desc = 0;
ep->pcd = _pcd;
ep->stopped = 1;
/* Init DWC ep structure */
ep->dwc_ep.is_in = 0;
ep->dwc_ep.num = i;
ep->dwc_ep.active = 0;
ep->dwc_ep.tx_fifo_num = 0;
/* Control until ep is actvated */
ep->dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
ep->dwc_ep.maxpacket = MAX_PACKET_SIZE;
ep->dwc_ep.dma_addr = 0;
ep->dwc_ep.start_xfer_buff = 0;
ep->dwc_ep.xfer_buff = 0;
ep->dwc_ep.xfer_len = 0;
ep->dwc_ep.xfer_count = 0;
ep->dwc_ep.sent_zlp = 0;
ep->dwc_ep.total_len = 0;
ep->queue_sof = 0;
/* Init the usb_ep structure. */
/**
* @todo NGS: Add direction to EP, based on contents
* of HWCFG1. Need a copy of HWCFG1 in pcd structure?
* sprintf( ";r
*/
ep->ep.name = names[15 + i];
ep->ep.ops = (struct usb_ep_ops *) &dwc_otg_pcd_ep_ops;
/**
* @todo NGS: What should the max packet size be set to
* here? Before EP type is set?
*/
ep->ep.maxpacket = MAX_PACKET_SIZE;
list_add_tail(&ep->ep.ep_list, &_pcd->gadget.ep_list);
INIT_LIST_HEAD(&ep->queue);
}
hwcfg1 >>= 2;
}
/* remove ep0 from the list. There is a ep0 pointer. */
list_del_init(&_pcd->ep0.ep.ep_list);
_pcd->ep0state = EP0_DISCONNECT;
_pcd->ep0.ep.maxpacket = MAX_EP0_SIZE;
_pcd->ep0.dwc_ep.maxpacket = MAX_EP0_SIZE;
_pcd->ep0.dwc_ep.type = DWC_OTG_EP_TYPE_CONTROL;
}
/**
* This function releases the Gadget device.
* required by device_unregister().
*
* @todo Should this do something? Should it free the PCD?
*/
static void dwc_otg_pcd_gadget_release(struct device *_dev)
{
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _dev);
}
/**
* This function initialized the PCD portion of the driver.
*
*/
int dwc_otg_pcd_init(struct lm_device *_lmdev)
{
static char pcd_name[] = "dwc_otg_pcd";
dwc_otg_pcd_t *pcd;
dwc_otg_core_if_t *core_if;
dwc_otg_dev_if_t *dev_if;
dwc_otg_device_t *otg_dev = lm_get_drvdata(_lmdev);
int retval = 0;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _lmdev);
/*
* Allocate PCD structure
*/
pcd = kmalloc(sizeof(dwc_otg_pcd_t), GFP_KERNEL);
if (pcd == 0) {
return -ENOMEM;
}
memset(pcd, 0, sizeof(dwc_otg_pcd_t));
spin_lock_init(&pcd->lock);
otg_dev->pcd = pcd;
s_pcd = pcd;
pcd->gadget.name = pcd_name;
strcpy(pcd->gadget.dev.bus_id, "gadget");
pcd->otg_dev = lm_get_drvdata(_lmdev);
pcd->gadget.dev.parent = &_lmdev->dev;
pcd->gadget.dev.release = dwc_otg_pcd_gadget_release;
pcd->gadget.ops = &dwc_otg_pcd_ops;
core_if = GET_CORE_IF(pcd);
dev_if = core_if->dev_if;
if (core_if->hwcfg4.b.ded_fifo_en) {
DWC_PRINT("Dedicated Tx FIFOs mode\n");
} else {
DWC_PRINT("Shared Tx FIFO mode\n");
}
/* If the module is set to FS or if the PHY_TYPE is FS then the gadget
* should not report as dual-speed capable. replace the following line
* with the block of code below it once the software is debugged for
* this. If is_dualspeed = 0 then the gadget driver should not report
* a device qualifier descriptor when queried. */
if ((GET_CORE_IF(pcd)->core_params->speed == DWC_SPEED_PARAM_FULL) ||
((GET_CORE_IF(pcd)->hwcfg2.b.hs_phy_type == 2) &&
(GET_CORE_IF(pcd)->hwcfg2.b.fs_phy_type == 1) &&
(GET_CORE_IF(pcd)->core_params->ulpi_fs_ls))) {
pcd->gadget.is_dualspeed = 0;
} else {
pcd->gadget.is_dualspeed = 1;
}
if ((otg_dev->core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE) ||
(otg_dev->core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST) ||
(otg_dev->core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) ||
(otg_dev->core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST)) {
pcd->gadget.is_otg = 0;
} else {
pcd->gadget.is_otg = 1;
}
pcd->driver = 0;
/* Register the gadget device */
device_register(&pcd->gadget.dev);
/*
* Initialized the Core for Device mode.
*/
if (dwc_otg_is_device_mode(core_if)) {
dwc_otg_core_dev_init(core_if);
}
/*
* Initialize EP structures
*/
dwc_otg_pcd_reinit(pcd);
/*
* Register the PCD Callbacks.
*/
dwc_otg_cil_register_pcd_callbacks(otg_dev->core_if, &pcd_callbacks, pcd);
/*
* Setup interupt handler
*/
DWC_DEBUGPL(DBG_ANY, "registering handler for irq%d\n", _lmdev->irq);
retval = request_irq(_lmdev->irq, dwc_otg_pcd_irq, SA_SHIRQ, pcd->gadget.name, pcd);
if (retval != 0) {
DWC_ERROR("request of irq%d failed\n", _lmdev->irq);
kfree(pcd);
return -EBUSY;
}
/*
* Initialize the DMA buffer for SETUP packets
*/
if (GET_CORE_IF(pcd)->dma_enable) {
pcd->setup_pkt =
dma_alloc_coherent(NULL, sizeof(*pcd->setup_pkt) * 5,
&pcd->setup_pkt_dma_handle, 0);
pcd->status_buf =
dma_alloc_coherent(NULL, sizeof(uint16_t), &pcd->status_buf_dma_handle, 0);
if (GET_CORE_IF(pcd)->dma_desc_enable) {
dev_if->setup_desc_addr[0] = ep_alloc_desc(&dev_if->dma_setup_desc_addr[0]);
dev_if->setup_desc_addr[1] = ep_alloc_desc(&dev_if->dma_setup_desc_addr[1]);
dev_if->in_desc_addr = ep_alloc_desc(&dev_if->dma_in_desc_addr);
dev_if->out_desc_addr = ep_alloc_desc(&dev_if->dma_out_desc_addr);
}
} else {
pcd->setup_pkt = kmalloc(sizeof(*pcd->setup_pkt) * 5, GFP_KERNEL);
pcd->status_buf = kmalloc(sizeof(uint16_t), GFP_KERNEL);
}
if (pcd->setup_pkt == 0) {
kfree(pcd);
return -ENOMEM;
}
/* Initialize tasklet */
start_xfer_tasklet.data = (unsigned long) pcd;
pcd->start_xfer_tasklet = &start_xfer_tasklet;
return 0;
}
/**
* Cleanup the PCD.
*/
void dwc_otg_pcd_remove(struct lm_device *_lmdev)
{
dwc_otg_device_t *otg_dev = lm_get_drvdata(_lmdev);
dwc_otg_pcd_t *pcd = otg_dev->pcd;
dwc_otg_dev_if_t *dev_if = GET_CORE_IF(pcd)->dev_if;
DWC_DEBUGPL(DBG_PCDV, "%s(%p)\n", __func__, _lmdev);
/*
* Free the IRQ
*/
free_irq(_lmdev->irq, pcd);
/* start with the driver above us */
if (pcd->driver) {
/* should have been done already by driver model core */
DWC_WARN("driver '%s' is still registered\n", pcd->driver->driver.name);
usb_gadget_unregister_driver(pcd->driver);
}
device_unregister(&pcd->gadget.dev);
if (GET_CORE_IF(pcd)->dma_enable) {
dma_free_coherent(NULL, sizeof(*pcd->setup_pkt) * 5, pcd->setup_pkt,
pcd->setup_pkt_dma_handle);
dma_free_coherent(NULL, sizeof(uint16_t), pcd->status_buf,
pcd->status_buf_dma_handle);
if (GET_CORE_IF(pcd)->dma_desc_enable) {
ep_free_desc(dev_if->setup_desc_addr[0], dev_if->dma_setup_desc_addr[0]);
ep_free_desc(dev_if->setup_desc_addr[1], dev_if->dma_setup_desc_addr[1]);
ep_free_desc(dev_if->in_desc_addr, dev_if->dma_in_desc_addr);
ep_free_desc(dev_if->out_desc_addr, dev_if->dma_out_desc_addr);
}
} else {
kfree(pcd->setup_pkt);
kfree(pcd->status_buf);
}
kfree(pcd);
otg_dev->pcd = 0;
}
/**
* This function registers a gadget driver with the PCD.
*
* When a driver is successfully registered, it will receive control
* requests including set_configuration(), which enables non-control
* requests. then usb traffic follows until a disconnect is reported.
* then a host may connect again, or the driver might get unbound.
*
* @param _driver The driver being registered
*/
int usb_gadget_register_driver(struct usb_gadget_driver *_driver)
{
int retval;
DWC_DEBUGPL(DBG_PCD, "registering gadget driver '%s'\n", _driver->driver.name);
if (!_driver || _driver->speed == USB_SPEED_UNKNOWN ||
!_driver->bind || !_driver->unbind || !_driver->disconnect || !_driver->setup) {
DWC_DEBUGPL(DBG_PCDV, "EINVAL\n");
return -EINVAL;
}
if (s_pcd == 0) {
DWC_DEBUGPL(DBG_PCDV, "ENODEV\n");
return -ENODEV;
}
if (s_pcd->driver != 0) {
DWC_DEBUGPL(DBG_PCDV, "EBUSY (%p)\n", s_pcd->driver);
return -EBUSY;
}
/* hook up the driver */
s_pcd->driver = _driver;
s_pcd->gadget.dev.driver = &_driver->driver;
DWC_DEBUGPL(DBG_PCD, "bind to driver %s\n", _driver->driver.name);
retval = _driver->bind(&s_pcd->gadget);
if (retval) {
DWC_ERROR("bind to driver %s --> error %d\n", _driver->driver.name, retval);
s_pcd->driver = 0;
s_pcd->gadget.dev.driver = 0;
return retval;
}
DWC_DEBUGPL(DBG_ANY, "registered gadget driver '%s'\n", _driver->driver.name);
return 0;
}
EXPORT_SYMBOL(usb_gadget_register_driver);
/**
* This function unregisters a gadget driver
*
* @param _driver The driver being unregistered
*/
int usb_gadget_unregister_driver(struct usb_gadget_driver *_driver)
{
//DWC_DEBUGPL(DBG_PCDV,"%s(%p)\n", __func__, _driver);
if (s_pcd == 0) {
DWC_DEBUGPL(DBG_ANY, "%s Return(%d): s_pcd==0\n", __func__, -ENODEV);
return -ENODEV;
}
if (_driver == 0 || _driver != s_pcd->driver) {
DWC_DEBUGPL(DBG_ANY, "%s Return(%d): driver?\n", __func__, -EINVAL);
return -EINVAL;
}
_driver->unbind(&s_pcd->gadget);
s_pcd->driver = 0;
DWC_DEBUGPL(DBG_ANY, "unregistered driver '%s'\n", _driver->driver.name);
return 0;
}
EXPORT_SYMBOL(usb_gadget_unregister_driver);
#endif /* DWC_HOST_ONLY */
Reference in New Issue View Git Blame Copy Permalink