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linux/drivers/usb/gadget/fsl_udc_core.c
Michal Nazarewicz 7177aed44f usb: gadget: rename usb_gadget_driver::speed to max_speed 
This commit renames the “speed” field of the usb_gadget_driver
structure to “max_speed”.  This is so that to make it more
apparent that the field represents the maximum speed gadget
driver can support.

This also make the field look more like fields with the same
name in usb_gadget and usb_composite_driver structures.  All
of those represent the *maximal* speed given entity supports.

After this commit, there are the following fields in various
structures:
* usb_gadget::speed - the current connection speed,
* usb_gadget::max_speed - maximal speed UDC supports,
* usb_gadget_driver::max_speed - maximal speed gadget driver
  supports, and
* usb_composite_driver::max_speed - maximal speed composite
  gadget supports.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:45:12 +02:00

2770 lines
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/*
* Copyright (C) 2004-2007,2011 Freescale Semiconductor, Inc.
* All rights reserved.
*
* Author: Li Yang <leoli@freescale.com>
* Jiang Bo <tanya.jiang@freescale.com>
*
* Description:
* Freescale high-speed USB SOC DR module device controller driver.
* This can be found on MPC8349E/MPC8313E/MPC5121E cpus.
* The driver is previously named as mpc_udc. Based on bare board
* code from Dave Liu and Shlomi Gridish.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#undef VERBOSE
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <linux/dmapool.h>
#include <linux/delay.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#include <asm/dma.h>
#include "fsl_usb2_udc.h"
#define DRIVER_DESC "Freescale High-Speed USB SOC Device Controller driver"
#define DRIVER_AUTHOR "Li Yang/Jiang Bo"
#define DRIVER_VERSION "Apr 20, 2007"
#define DMA_ADDR_INVALID (~(dma_addr_t)0)
static const char driver_name[] = "fsl-usb2-udc";
static const char driver_desc[] = DRIVER_DESC;
static struct usb_dr_device *dr_regs;
#ifndef CONFIG_ARCH_MXC
static struct usb_sys_interface *usb_sys_regs;
#endif
/* it is initialized in probe() */
static struct fsl_udc *udc_controller = NULL;
static const struct usb_endpoint_descriptor
fsl_ep0_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0,
.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
.wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
};
static void fsl_ep_fifo_flush(struct usb_ep *_ep);
#ifdef CONFIG_PPC32
/*
* On some SoCs, the USB controller registers can be big or little endian,
* depending on the version of the chip. In order to be able to run the
* same kernel binary on 2 different versions of an SoC, the BE/LE decision
* must be made at run time. _fsl_readl and fsl_writel are pointers to the
* BE or LE readl() and writel() functions, and fsl_readl() and fsl_writel()
* call through those pointers. Platform code for SoCs that have BE USB
* registers should set pdata->big_endian_mmio flag.
*
* This also applies to controller-to-cpu accessors for the USB descriptors,
* since their endianness is also SoC dependant. Platform code for SoCs that
* have BE USB descriptors should set pdata->big_endian_desc flag.
*/
static u32 _fsl_readl_be(const unsigned __iomem *p)
{
return in_be32(p);
}
static u32 _fsl_readl_le(const unsigned __iomem *p)
{
return in_le32(p);
}
static void _fsl_writel_be(u32 v, unsigned __iomem *p)
{
out_be32(p, v);
}
static void _fsl_writel_le(u32 v, unsigned __iomem *p)
{
out_le32(p, v);
}
static u32 (*_fsl_readl)(const unsigned __iomem *p);
static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
#define fsl_readl(p) (*_fsl_readl)((p))
#define fsl_writel(v, p) (*_fsl_writel)((v), (p))
static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata)
{
if (pdata->big_endian_mmio) {
_fsl_readl = _fsl_readl_be;
_fsl_writel = _fsl_writel_be;
} else {
_fsl_readl = _fsl_readl_le;
_fsl_writel = _fsl_writel_le;
}
}
static inline u32 cpu_to_hc32(const u32 x)
{
return udc_controller->pdata->big_endian_desc
? (__force u32)cpu_to_be32(x)
: (__force u32)cpu_to_le32(x);
}
static inline u32 hc32_to_cpu(const u32 x)
{
return udc_controller->pdata->big_endian_desc
? be32_to_cpu((__force __be32)x)
: le32_to_cpu((__force __le32)x);
}
#else /* !CONFIG_PPC32 */
static inline void fsl_set_accessors(struct fsl_usb2_platform_data *pdata) {}
#define fsl_readl(addr) readl(addr)
#define fsl_writel(val32, addr) writel(val32, addr)
#define cpu_to_hc32(x) cpu_to_le32(x)
#define hc32_to_cpu(x) le32_to_cpu(x)
#endif /* CONFIG_PPC32 */
/********************************************************************
* Internal Used Function
********************************************************************/
/*-----------------------------------------------------------------
* done() - retire a request; caller blocked irqs
* @status : request status to be set, only works when
* request is still in progress.
*--------------------------------------------------------------*/
static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
{
struct fsl_udc *udc = NULL;
unsigned char stopped = ep->stopped;
struct ep_td_struct *curr_td, *next_td;
int j;
udc = (struct fsl_udc *)ep->udc;
/* Removed the req from fsl_ep->queue */
list_del_init(&req->queue);
/* req.status should be set as -EINPROGRESS in ep_queue() */
if (req->req.status == -EINPROGRESS)
req->req.status = status;
else
status = req->req.status;
/* Free dtd for the request */
next_td = req->head;
for (j = 0; j < req->dtd_count; j++) {
curr_td = next_td;
if (j != req->dtd_count - 1) {
next_td = curr_td->next_td_virt;
}
dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
}
if (req->mapped) {
dma_unmap_single(ep->udc->gadget.dev.parent,
req->req.dma, req->req.length,
ep_is_in(ep)
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
req->req.dma = DMA_ADDR_INVALID;
req->mapped = 0;
} else
dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
req->req.dma, req->req.length,
ep_is_in(ep)
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
if (status && (status != -ESHUTDOWN))
VDBG("complete %s req %p stat %d len %u/%u",
ep->ep.name, &req->req, status,
req->req.actual, req->req.length);
ep->stopped = 1;
spin_unlock(&ep->udc->lock);
/* complete() is from gadget layer,
* eg fsg->bulk_in_complete() */
if (req->req.complete)
req->req.complete(&ep->ep, &req->req);
spin_lock(&ep->udc->lock);
ep->stopped = stopped;
}
/*-----------------------------------------------------------------
* nuke(): delete all requests related to this ep
* called with spinlock held
*--------------------------------------------------------------*/
static void nuke(struct fsl_ep *ep, int status)
{
ep->stopped = 1;
/* Flush fifo */
fsl_ep_fifo_flush(&ep->ep);
/* Whether this eq has request linked */
while (!list_empty(&ep->queue)) {
struct fsl_req *req = NULL;
req = list_entry(ep->queue.next, struct fsl_req, queue);
done(ep, req, status);
}
}
/*------------------------------------------------------------------
Internal Hardware related function
------------------------------------------------------------------*/
static int dr_controller_setup(struct fsl_udc *udc)
{
unsigned int tmp, portctrl, ep_num;
unsigned int max_no_of_ep;
#ifndef CONFIG_ARCH_MXC
unsigned int ctrl;
#endif
unsigned long timeout;
#define FSL_UDC_RESET_TIMEOUT 1000
/* Config PHY interface */
portctrl = fsl_readl(&dr_regs->portsc1);
portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
switch (udc->phy_mode) {
case FSL_USB2_PHY_ULPI:
portctrl |= PORTSCX_PTS_ULPI;
break;
case FSL_USB2_PHY_UTMI_WIDE:
portctrl |= PORTSCX_PTW_16BIT;
/* fall through */
case FSL_USB2_PHY_UTMI:
portctrl |= PORTSCX_PTS_UTMI;
break;
case FSL_USB2_PHY_SERIAL:
portctrl |= PORTSCX_PTS_FSLS;
break;
default:
return -EINVAL;
}
fsl_writel(portctrl, &dr_regs->portsc1);
/* Stop and reset the usb controller */
tmp = fsl_readl(&dr_regs->usbcmd);
tmp &= ~USB_CMD_RUN_STOP;
fsl_writel(tmp, &dr_regs->usbcmd);
tmp = fsl_readl(&dr_regs->usbcmd);
tmp |= USB_CMD_CTRL_RESET;
fsl_writel(tmp, &dr_regs->usbcmd);
/* Wait for reset to complete */
timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
if (time_after(jiffies, timeout)) {
ERR("udc reset timeout!\n");
return -ETIMEDOUT;
}
cpu_relax();
}
/* Set the controller as device mode */
tmp = fsl_readl(&dr_regs->usbmode);
tmp &= ~USB_MODE_CTRL_MODE_MASK; /* clear mode bits */
tmp |= USB_MODE_CTRL_MODE_DEVICE;
/* Disable Setup Lockout */
tmp |= USB_MODE_SETUP_LOCK_OFF;
if (udc->pdata->es)
tmp |= USB_MODE_ES;
fsl_writel(tmp, &dr_regs->usbmode);
/* Clear the setup status */
fsl_writel(0, &dr_regs->usbsts);
tmp = udc->ep_qh_dma;
tmp &= USB_EP_LIST_ADDRESS_MASK;
fsl_writel(tmp, &dr_regs->endpointlistaddr);
VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
udc->ep_qh, (int)tmp,
fsl_readl(&dr_regs->endpointlistaddr));
max_no_of_ep = (0x0000001F & fsl_readl(&dr_regs->dccparams));
for (ep_num = 1; ep_num < max_no_of_ep; ep_num++) {
tmp = fsl_readl(&dr_regs->endptctrl[ep_num]);
tmp &= ~(EPCTRL_TX_TYPE | EPCTRL_RX_TYPE);
tmp |= (EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT)
| (EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT);
fsl_writel(tmp, &dr_regs->endptctrl[ep_num]);
}
/* Config control enable i/o output, cpu endian register */
#ifndef CONFIG_ARCH_MXC
if (udc->pdata->have_sysif_regs) {
ctrl = __raw_readl(&usb_sys_regs->control);
ctrl |= USB_CTRL_IOENB;
__raw_writel(ctrl, &usb_sys_regs->control);
}
#endif
#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
/* Turn on cache snooping hardware, since some PowerPC platforms
* wholly rely on hardware to deal with cache coherent. */
if (udc->pdata->have_sysif_regs) {
/* Setup Snooping for all the 4GB space */
tmp = SNOOP_SIZE_2GB; /* starts from 0x0, size 2G */
__raw_writel(tmp, &usb_sys_regs->snoop1);
tmp |= 0x80000000; /* starts from 0x8000000, size 2G */
__raw_writel(tmp, &usb_sys_regs->snoop2);
}
#endif
return 0;
}
/* Enable DR irq and set controller to run state */
static void dr_controller_run(struct fsl_udc *udc)
{
u32 temp;
/* Enable DR irq reg */
temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
| USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
| USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
fsl_writel(temp, &dr_regs->usbintr);
/* Clear stopped bit */
udc->stopped = 0;
/* Set the controller as device mode */
temp = fsl_readl(&dr_regs->usbmode);
temp |= USB_MODE_CTRL_MODE_DEVICE;
fsl_writel(temp, &dr_regs->usbmode);
/* Set controller to Run */
temp = fsl_readl(&dr_regs->usbcmd);
temp |= USB_CMD_RUN_STOP;
fsl_writel(temp, &dr_regs->usbcmd);
}
static void dr_controller_stop(struct fsl_udc *udc)
{
unsigned int tmp;
pr_debug("%s\n", __func__);
/* if we're in OTG mode, and the Host is currently using the port,
* stop now and don't rip the controller out from under the
* ehci driver
*/
if (udc->gadget.is_otg) {
if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
pr_debug("udc: Leaving early\n");
return;
}
}
/* disable all INTR */
fsl_writel(0, &dr_regs->usbintr);
/* Set stopped bit for isr */
udc->stopped = 1;
/* disable IO output */
/* usb_sys_regs->control = 0; */
/* set controller to Stop */
tmp = fsl_readl(&dr_regs->usbcmd);
tmp &= ~USB_CMD_RUN_STOP;
fsl_writel(tmp, &dr_regs->usbcmd);
}
static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
unsigned char ep_type)
{
unsigned int tmp_epctrl = 0;
tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (dir) {
if (ep_num)
tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
tmp_epctrl |= EPCTRL_TX_ENABLE;
tmp_epctrl &= ~EPCTRL_TX_TYPE;
tmp_epctrl |= ((unsigned int)(ep_type)
<< EPCTRL_TX_EP_TYPE_SHIFT);
} else {
if (ep_num)
tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
tmp_epctrl |= EPCTRL_RX_ENABLE;
tmp_epctrl &= ~EPCTRL_RX_TYPE;
tmp_epctrl |= ((unsigned int)(ep_type)
<< EPCTRL_RX_EP_TYPE_SHIFT);
}
fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
}
static void
dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
{
u32 tmp_epctrl = 0;
tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (value) {
/* set the stall bit */
if (dir)
tmp_epctrl |= EPCTRL_TX_EP_STALL;
else
tmp_epctrl |= EPCTRL_RX_EP_STALL;
} else {
/* clear the stall bit and reset data toggle */
if (dir) {
tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
} else {
tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
}
}
fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
}
/* Get stall status of a specific ep
Return: 0: not stalled; 1:stalled */
static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
{
u32 epctrl;
epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (dir)
return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
else
return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
}
/********************************************************************
Internal Structure Build up functions
********************************************************************/
/*------------------------------------------------------------------
* struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
* @zlt: Zero Length Termination Select (1: disable; 0: enable)
* @mult: Mult field
------------------------------------------------------------------*/
static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
unsigned char dir, unsigned char ep_type,
unsigned int max_pkt_len,
unsigned int zlt, unsigned char mult)
{
struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
unsigned int tmp = 0;
/* set the Endpoint Capabilites in QH */
switch (ep_type) {
case USB_ENDPOINT_XFER_CONTROL:
/* Interrupt On Setup (IOS). for control ep */
tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
| EP_QUEUE_HEAD_IOS;
break;
case USB_ENDPOINT_XFER_ISOC:
tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
| (mult << EP_QUEUE_HEAD_MULT_POS);
break;
case USB_ENDPOINT_XFER_BULK:
case USB_ENDPOINT_XFER_INT:
tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
break;
default:
VDBG("error ep type is %d", ep_type);
return;
}
if (zlt)
tmp |= EP_QUEUE_HEAD_ZLT_SEL;
p_QH->max_pkt_length = cpu_to_hc32(tmp);
p_QH->next_dtd_ptr = 1;
p_QH->size_ioc_int_sts = 0;
}
/* Setup qh structure and ep register for ep0. */
static void ep0_setup(struct fsl_udc *udc)
{
/* the intialization of an ep includes: fields in QH, Regs,
* fsl_ep struct */
struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
USB_MAX_CTRL_PAYLOAD, 0, 0);
struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
USB_MAX_CTRL_PAYLOAD, 0, 0);
dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
return;
}
/***********************************************************************
Endpoint Management Functions
***********************************************************************/
/*-------------------------------------------------------------------------
* when configurations are set, or when interface settings change
* for example the do_set_interface() in gadget layer,
* the driver will enable or disable the relevant endpoints
* ep0 doesn't use this routine. It is always enabled.
-------------------------------------------------------------------------*/
static int fsl_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct fsl_udc *udc = NULL;
struct fsl_ep *ep = NULL;
unsigned short max = 0;
unsigned char mult = 0, zlt;
int retval = -EINVAL;
unsigned long flags = 0;
ep = container_of(_ep, struct fsl_ep, ep);
/* catch various bogus parameters */
if (!_ep || !desc || ep->desc
|| (desc->bDescriptorType != USB_DT_ENDPOINT))
return -EINVAL;
udc = ep->udc;
if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
return -ESHUTDOWN;
max = usb_endpoint_maxp(desc);
/* Disable automatic zlp generation. Driver is responsible to indicate
* explicitly through req->req.zero. This is needed to enable multi-td
* request. */
zlt = 1;
/* Assume the max packet size from gadget is always correct */
switch (desc->bmAttributes & 0x03) {
case USB_ENDPOINT_XFER_CONTROL:
case USB_ENDPOINT_XFER_BULK:
case USB_ENDPOINT_XFER_INT:
/* mult = 0. Execute N Transactions as demonstrated by
* the USB variable length packet protocol where N is
* computed using the Maximum Packet Length (dQH) and
* the Total Bytes field (dTD) */
mult = 0;
break;
case USB_ENDPOINT_XFER_ISOC:
/* Calculate transactions needed for high bandwidth iso */
mult = (unsigned char)(1 + ((max >> 11) & 0x03));
max = max & 0x7ff; /* bit 0~10 */
/* 3 transactions at most */
if (mult > 3)
goto en_done;
break;
default:
goto en_done;
}
spin_lock_irqsave(&udc->lock, flags);
ep->ep.maxpacket = max;
ep->desc = desc;
ep->stopped = 0;
/* Controller related setup */
/* Init EPx Queue Head (Ep Capabilites field in QH
* according to max, zlt, mult) */
struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
(unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
? USB_SEND : USB_RECV),
(unsigned char) (desc->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK),
max, zlt, mult);
/* Init endpoint ctrl register */
dr_ep_setup((unsigned char) ep_index(ep),
(unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
? USB_SEND : USB_RECV),
(unsigned char) (desc->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK));
spin_unlock_irqrestore(&udc->lock, flags);
retval = 0;
VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
ep->desc->bEndpointAddress & 0x0f,
(desc->bEndpointAddress & USB_DIR_IN)
? "in" : "out", max);
en_done:
return retval;
}
/*---------------------------------------------------------------------
* @ep : the ep being unconfigured. May not be ep0
* Any pending and uncomplete req will complete with status (-ESHUTDOWN)
*---------------------------------------------------------------------*/
static int fsl_ep_disable(struct usb_ep *_ep)
{
struct fsl_udc *udc = NULL;
struct fsl_ep *ep = NULL;
unsigned long flags = 0;
u32 epctrl;
int ep_num;
ep = container_of(_ep, struct fsl_ep, ep);
if (!_ep || !ep->desc) {
VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
return -EINVAL;
}
/* disable ep on controller */
ep_num = ep_index(ep);
epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (ep_is_in(ep)) {
epctrl &= ~(EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE);
epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_TX_EP_TYPE_SHIFT;
} else {
epctrl &= ~(EPCTRL_RX_ENABLE | EPCTRL_TX_TYPE);
epctrl |= EPCTRL_EP_TYPE_BULK << EPCTRL_RX_EP_TYPE_SHIFT;
}
fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
udc = (struct fsl_udc *)ep->udc;
spin_lock_irqsave(&udc->lock, flags);
/* nuke all pending requests (does flush) */
nuke(ep, -ESHUTDOWN);
ep->desc = NULL;
ep->stopped = 1;
spin_unlock_irqrestore(&udc->lock, flags);
VDBG("disabled %s OK", _ep->name);
return 0;
}
/*---------------------------------------------------------------------
* allocate a request object used by this endpoint
* the main operation is to insert the req->queue to the eq->queue
* Returns the request, or null if one could not be allocated
*---------------------------------------------------------------------*/
static struct usb_request *
fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
{
struct fsl_req *req = NULL;
req = kzalloc(sizeof *req, gfp_flags);
if (!req)
return NULL;
req->req.dma = DMA_ADDR_INVALID;
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
struct fsl_req *req = NULL;
req = container_of(_req, struct fsl_req, req);
if (_req)
kfree(req);
}
/* Actually add a dTD chain to an empty dQH and let go */
static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
{
struct ep_queue_head *qh = get_qh_by_ep(ep);
/* Write dQH next pointer and terminate bit to 0 */
qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
& EP_QUEUE_HEAD_NEXT_POINTER_MASK);
/* Clear active and halt bit */
qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
| EP_QUEUE_HEAD_STATUS_HALT));
/* Ensure that updates to the QH will occur before priming. */
wmb();
/* Prime endpoint by writing correct bit to ENDPTPRIME */
fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
: (1 << (ep_index(ep))), &dr_regs->endpointprime);
}
/* Add dTD chain to the dQH of an EP */
static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
{
u32 temp, bitmask, tmp_stat;
/* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
bitmask = ep_is_in(ep)
? (1 << (ep_index(ep) + 16))
: (1 << (ep_index(ep)));
/* check if the pipe is empty */
if (!(list_empty(&ep->queue))) {
/* Add td to the end */
struct fsl_req *lastreq;
lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
lastreq->tail->next_td_ptr =
cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
/* Read prime bit, if 1 goto done */
if (fsl_readl(&dr_regs->endpointprime) & bitmask)
return;
do {
/* Set ATDTW bit in USBCMD */
temp = fsl_readl(&dr_regs->usbcmd);
fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
/* Read correct status bit */
tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
} while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
/* Write ATDTW bit to 0 */
temp = fsl_readl(&dr_regs->usbcmd);
fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
if (tmp_stat)
return;
}
fsl_prime_ep(ep, req->head);
}
/* Fill in the dTD structure
* @req: request that the transfer belongs to
* @length: return actually data length of the dTD
* @dma: return dma address of the dTD
* @is_last: return flag if it is the last dTD of the request
* return: pointer to the built dTD */
static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
dma_addr_t *dma, int *is_last)
{
u32 swap_temp;
struct ep_td_struct *dtd;
/* how big will this transfer be? */
*length = min(req->req.length - req->req.actual,
(unsigned)EP_MAX_LENGTH_TRANSFER);
dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
if (dtd == NULL)
return dtd;
dtd->td_dma = *dma;
/* Clear reserved field */
swap_temp = hc32_to_cpu(dtd->size_ioc_sts);
swap_temp &= ~DTD_RESERVED_FIELDS;
dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
/* Init all of buffer page pointers */
swap_temp = (u32) (req->req.dma + req->req.actual);
dtd->buff_ptr0 = cpu_to_hc32(swap_temp);
dtd->buff_ptr1 = cpu_to_hc32(swap_temp + 0x1000);
dtd->buff_ptr2 = cpu_to_hc32(swap_temp + 0x2000);
dtd->buff_ptr3 = cpu_to_hc32(swap_temp + 0x3000);
dtd->buff_ptr4 = cpu_to_hc32(swap_temp + 0x4000);
req->req.actual += *length;
/* zlp is needed if req->req.zero is set */
if (req->req.zero) {
if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
*is_last = 1;
else
*is_last = 0;
} else if (req->req.length == req->req.actual)
*is_last = 1;
else
*is_last = 0;
if ((*is_last) == 0)
VDBG("multi-dtd request!");
/* Fill in the transfer size; set active bit */
swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
/* Enable interrupt for the last dtd of a request */
if (*is_last && !req->req.no_interrupt)
swap_temp |= DTD_IOC;
dtd->size_ioc_sts = cpu_to_hc32(swap_temp);
mb();
VDBG("length = %d address= 0x%x", *length, (int)*dma);
return dtd;
}
/* Generate dtd chain for a request */
static int fsl_req_to_dtd(struct fsl_req *req)
{
unsigned count;
int is_last;
int is_first =1;
struct ep_td_struct *last_dtd = NULL, *dtd;
dma_addr_t dma;
do {
dtd = fsl_build_dtd(req, &count, &dma, &is_last);
if (dtd == NULL)
return -ENOMEM;
if (is_first) {
is_first = 0;
req->head = dtd;
} else {
last_dtd->next_td_ptr = cpu_to_hc32(dma);
last_dtd->next_td_virt = dtd;
}
last_dtd = dtd;
req->dtd_count++;
} while (!is_last);
dtd->next_td_ptr = cpu_to_hc32(DTD_NEXT_TERMINATE);
req->tail = dtd;
return 0;
}
/* queues (submits) an I/O request to an endpoint */
static int
fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
{
struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
struct fsl_req *req = container_of(_req, struct fsl_req, req);
struct fsl_udc *udc;
unsigned long flags;
/* catch various bogus parameters */
if (!_req || !req->req.complete || !req->req.buf
|| !list_empty(&req->queue)) {
VDBG("%s, bad params", __func__);
return -EINVAL;
}
if (unlikely(!_ep || !ep->desc)) {
VDBG("%s, bad ep", __func__);
return -EINVAL;
}
if (usb_endpoint_xfer_isoc(ep->desc)) {
if (req->req.length > ep->ep.maxpacket)
return -EMSGSIZE;
}
udc = ep->udc;
if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
return -ESHUTDOWN;
req->ep = ep;
/* map virtual address to hardware */
if (req->req.dma == DMA_ADDR_INVALID) {
req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
req->req.buf,
req->req.length, ep_is_in(ep)
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
req->mapped = 1;
} else {
dma_sync_single_for_device(ep->udc->gadget.dev.parent,
req->req.dma, req->req.length,
ep_is_in(ep)
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
req->mapped = 0;
}
req->req.status = -EINPROGRESS;
req->req.actual = 0;
req->dtd_count = 0;
spin_lock_irqsave(&udc->lock, flags);
/* build dtds and push them to device queue */
if (!fsl_req_to_dtd(req)) {
fsl_queue_td(ep, req);
} else {
spin_unlock_irqrestore(&udc->lock, flags);
return -ENOMEM;
}
/* Update ep0 state */
if ((ep_index(ep) == 0))
udc->ep0_state = DATA_STATE_XMIT;
/* irq handler advances the queue */
if (req != NULL)
list_add_tail(&req->queue, &ep->queue);
spin_unlock_irqrestore(&udc->lock, flags);
return 0;
}
/* dequeues (cancels, unlinks) an I/O request from an endpoint */
static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
struct fsl_req *req;
unsigned long flags;
int ep_num, stopped, ret = 0;
u32 epctrl;
if (!_ep || !_req)
return -EINVAL;
spin_lock_irqsave(&ep->udc->lock, flags);
stopped = ep->stopped;
/* Stop the ep before we deal with the queue */
ep->stopped = 1;
ep_num = ep_index(ep);
epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (ep_is_in(ep))
epctrl &= ~EPCTRL_TX_ENABLE;
else
epctrl &= ~EPCTRL_RX_ENABLE;
fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
/* make sure it's actually queued on this endpoint */
list_for_each_entry(req, &ep->queue, queue) {
if (&req->req == _req)
break;
}
if (&req->req != _req) {
ret = -EINVAL;
goto out;
}
/* The request is in progress, or completed but not dequeued */
if (ep->queue.next == &req->queue) {
_req->status = -ECONNRESET;
fsl_ep_fifo_flush(_ep); /* flush current transfer */
/* The request isn't the last request in this ep queue */
if (req->queue.next != &ep->queue) {
struct fsl_req *next_req;
next_req = list_entry(req->queue.next, struct fsl_req,
queue);
/* prime with dTD of next request */
fsl_prime_ep(ep, next_req->head);
}
/* The request hasn't been processed, patch up the TD chain */
} else {
struct fsl_req *prev_req;
prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
}
done(ep, req, -ECONNRESET);
/* Enable EP */
out: epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
if (ep_is_in(ep))
epctrl |= EPCTRL_TX_ENABLE;
else
epctrl |= EPCTRL_RX_ENABLE;
fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
ep->stopped = stopped;
spin_unlock_irqrestore(&ep->udc->lock, flags);
return ret;
}
/*-------------------------------------------------------------------------*/
/*-----------------------------------------------------------------
* modify the endpoint halt feature
* @ep: the non-isochronous endpoint being stalled
* @value: 1--set halt 0--clear halt
* Returns zero, or a negative error code.
*----------------------------------------------------------------*/
static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
{
struct fsl_ep *ep = NULL;
unsigned long flags = 0;
int status = -EOPNOTSUPP; /* operation not supported */
unsigned char ep_dir = 0, ep_num = 0;
struct fsl_udc *udc = NULL;
ep = container_of(_ep, struct fsl_ep, ep);
udc = ep->udc;
if (!_ep || !ep->desc) {
status = -EINVAL;
goto out;
}
if (usb_endpoint_xfer_isoc(ep->desc)) {
status = -EOPNOTSUPP;
goto out;
}
/* Attempt to halt IN ep will fail if any transfer requests
* are still queue */
if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
status = -EAGAIN;
goto out;
}
status = 0;
ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
ep_num = (unsigned char)(ep_index(ep));
spin_lock_irqsave(&ep->udc->lock, flags);
dr_ep_change_stall(ep_num, ep_dir, value);
spin_unlock_irqrestore(&ep->udc->lock, flags);
if (ep_index(ep) == 0) {
udc->ep0_state = WAIT_FOR_SETUP;
udc->ep0_dir = 0;
}
out:
VDBG(" %s %s halt stat %d", ep->ep.name,
value ? "set" : "clear", status);
return status;
}
static int fsl_ep_fifo_status(struct usb_ep *_ep)
{
struct fsl_ep *ep;
struct fsl_udc *udc;
int size = 0;
u32 bitmask;
struct ep_queue_head *qh;
ep = container_of(_ep, struct fsl_ep, ep);
if (!_ep || (!ep->desc && ep_index(ep) != 0))
return -ENODEV;
udc = (struct fsl_udc *)ep->udc;
if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
return -ESHUTDOWN;
qh = get_qh_by_ep(ep);
bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
(1 << (ep_index(ep)));
if (fsl_readl(&dr_regs->endptstatus) & bitmask)
size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
>> DTD_LENGTH_BIT_POS;
pr_debug("%s %u\n", __func__, size);
return size;
}
static void fsl_ep_fifo_flush(struct usb_ep *_ep)
{
struct fsl_ep *ep;
int ep_num, ep_dir;
u32 bits;
unsigned long timeout;
#define FSL_UDC_FLUSH_TIMEOUT 1000
if (!_ep) {
return;
} else {
ep = container_of(_ep, struct fsl_ep, ep);
if (!ep->desc)
return;
}
ep_num = ep_index(ep);
ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
if (ep_num == 0)
bits = (1 << 16) | 1;
else if (ep_dir == USB_SEND)
bits = 1 << (16 + ep_num);
else
bits = 1 << ep_num;
timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
do {
fsl_writel(bits, &dr_regs->endptflush);
/* Wait until flush complete */
while (fsl_readl(&dr_regs->endptflush)) {
if (time_after(jiffies, timeout)) {
ERR("ep flush timeout\n");
return;
}
cpu_relax();
}
/* See if we need to flush again */
} while (fsl_readl(&dr_regs->endptstatus) & bits);
}
static struct usb_ep_ops fsl_ep_ops = {
.enable = fsl_ep_enable,
.disable = fsl_ep_disable,
.alloc_request = fsl_alloc_request,
.free_request = fsl_free_request,
.queue = fsl_ep_queue,
.dequeue = fsl_ep_dequeue,
.set_halt = fsl_ep_set_halt,
.fifo_status = fsl_ep_fifo_status,
.fifo_flush = fsl_ep_fifo_flush, /* flush fifo */
};
/*-------------------------------------------------------------------------
Gadget Driver Layer Operations
-------------------------------------------------------------------------*/
/*----------------------------------------------------------------------
* Get the current frame number (from DR frame_index Reg )
*----------------------------------------------------------------------*/
static int fsl_get_frame(struct usb_gadget *gadget)
{
return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
}
/*-----------------------------------------------------------------------
* Tries to wake up the host connected to this gadget
-----------------------------------------------------------------------*/
static int fsl_wakeup(struct usb_gadget *gadget)
{
struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
u32 portsc;
/* Remote wakeup feature not enabled by host */
if (!udc->remote_wakeup)
return -ENOTSUPP;
portsc = fsl_readl(&dr_regs->portsc1);
/* not suspended? */
if (!(portsc & PORTSCX_PORT_SUSPEND))
return 0;
/* trigger force resume */
portsc |= PORTSCX_PORT_FORCE_RESUME;
fsl_writel(portsc, &dr_regs->portsc1);
return 0;
}
static int can_pullup(struct fsl_udc *udc)
{
return udc->driver && udc->softconnect && udc->vbus_active;
}
/* Notify controller that VBUS is powered, Called by whatever
detects VBUS sessions */
static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
{
struct fsl_udc *udc;
unsigned long flags;
udc = container_of(gadget, struct fsl_udc, gadget);
spin_lock_irqsave(&udc->lock, flags);
VDBG("VBUS %s", is_active ? "on" : "off");
udc->vbus_active = (is_active != 0);
if (can_pullup(udc))
fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
&dr_regs->usbcmd);
else
fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
&dr_regs->usbcmd);
spin_unlock_irqrestore(&udc->lock, flags);
return 0;
}
/* constrain controller's VBUS power usage
* This call is used by gadget drivers during SET_CONFIGURATION calls,
* reporting how much power the device may consume. For example, this
* could affect how quickly batteries are recharged.
*
* Returns zero on success, else negative errno.
*/
static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
{
struct fsl_udc *udc;
udc = container_of(gadget, struct fsl_udc, gadget);
if (udc->transceiver)
return otg_set_power(udc->transceiver, mA);
return -ENOTSUPP;
}
/* Change Data+ pullup status
* this func is used by usb_gadget_connect/disconnet
*/
static int fsl_pullup(struct usb_gadget *gadget, int is_on)
{
struct fsl_udc *udc;
udc = container_of(gadget, struct fsl_udc, gadget);
udc->softconnect = (is_on != 0);
if (can_pullup(udc))
fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
&dr_regs->usbcmd);
else
fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
&dr_regs->usbcmd);
return 0;
}
static int fsl_start(struct usb_gadget_driver *driver,
int (*bind)(struct usb_gadget *));
static int fsl_stop(struct usb_gadget_driver *driver);
/* defined in gadget.h */
static struct usb_gadget_ops fsl_gadget_ops = {
.get_frame = fsl_get_frame,
.wakeup = fsl_wakeup,
/* .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
.vbus_session = fsl_vbus_session,
.vbus_draw = fsl_vbus_draw,
.pullup = fsl_pullup,
.start = fsl_start,
.stop = fsl_stop,
};
/* Set protocol stall on ep0, protocol stall will automatically be cleared
on new transaction */
static void ep0stall(struct fsl_udc *udc)
{
u32 tmp;
/* must set tx and rx to stall at the same time */
tmp = fsl_readl(&dr_regs->endptctrl[0]);
tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
fsl_writel(tmp, &dr_regs->endptctrl[0]);
udc->ep0_state = WAIT_FOR_SETUP;
udc->ep0_dir = 0;
}
/* Prime a status phase for ep0 */
static int ep0_prime_status(struct fsl_udc *udc, int direction)
{
struct fsl_req *req = udc->status_req;
struct fsl_ep *ep;
if (direction == EP_DIR_IN)
udc->ep0_dir = USB_DIR_IN;
else
udc->ep0_dir = USB_DIR_OUT;
ep = &udc->eps[0];
udc->ep0_state = WAIT_FOR_OUT_STATUS;
req->ep = ep;
req->req.length = 0;
req->req.status = -EINPROGRESS;
req->req.actual = 0;
req->req.complete = NULL;
req->dtd_count = 0;
req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
req->req.buf, req->req.length,
ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
req->mapped = 1;
if (fsl_req_to_dtd(req) == 0)
fsl_queue_td(ep, req);
else
return -ENOMEM;
list_add_tail(&req->queue, &ep->queue);
return 0;
}
static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
{
struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
if (ep->name)
nuke(ep, -ESHUTDOWN);
}
/*
* ch9 Set address
*/
static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
{
/* Save the new address to device struct */
udc->device_address = (u8) value;
/* Update usb state */
udc->usb_state = USB_STATE_ADDRESS;
/* Status phase */
if (ep0_prime_status(udc, EP_DIR_IN))
ep0stall(udc);
}
/*
* ch9 Get status
*/
static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
u16 index, u16 length)
{
u16 tmp = 0; /* Status, cpu endian */
struct fsl_req *req;
struct fsl_ep *ep;
ep = &udc->eps[0];
if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
/* Get device status */
tmp = 1 << USB_DEVICE_SELF_POWERED;
tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
} else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
/* Get interface status */
/* We don't have interface information in udc driver */
tmp = 0;
} else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
/* Get endpoint status */
struct fsl_ep *target_ep;
target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
/* stall if endpoint doesn't exist */
if (!target_ep->desc)
goto stall;
tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
<< USB_ENDPOINT_HALT;
}
udc->ep0_dir = USB_DIR_IN;
/* Borrow the per device status_req */
req = udc->status_req;
/* Fill in the reqest structure */
*((u16 *) req->req.buf) = cpu_to_le16(tmp);
req->ep = ep;
req->req.length = 2;
req->req.status = -EINPROGRESS;
req->req.actual = 0;
req->req.complete = NULL;
req->dtd_count = 0;
req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
req->req.buf, req->req.length,
ep_is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
req->mapped = 1;
/* prime the data phase */
if ((fsl_req_to_dtd(req) == 0))
fsl_queue_td(ep, req);
else /* no mem */
goto stall;
list_add_tail(&req->queue, &ep->queue);
udc->ep0_state = DATA_STATE_XMIT;
return;
stall:
ep0stall(udc);
}
static void setup_received_irq(struct fsl_udc *udc,
struct usb_ctrlrequest *setup)
{
u16 wValue = le16_to_cpu(setup->wValue);
u16 wIndex = le16_to_cpu(setup->wIndex);
u16 wLength = le16_to_cpu(setup->wLength);
udc_reset_ep_queue(udc, 0);
/* We process some stardard setup requests here */
switch (setup->bRequest) {
case USB_REQ_GET_STATUS:
/* Data+Status phase from udc */
if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
!= (USB_DIR_IN | USB_TYPE_STANDARD))
break;
ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
return;
case USB_REQ_SET_ADDRESS:
/* Status phase from udc */
if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
| USB_RECIP_DEVICE))
break;
ch9setaddress(udc, wValue, wIndex, wLength);
return;
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
/* Status phase from udc */
{
int rc = -EOPNOTSUPP;
u16 ptc = 0;
if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
== (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
int pipe = get_pipe_by_windex(wIndex);
struct fsl_ep *ep;
if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
break;
ep = get_ep_by_pipe(udc, pipe);
spin_unlock(&udc->lock);
rc = fsl_ep_set_halt(&ep->ep,
(setup->bRequest == USB_REQ_SET_FEATURE)
? 1 : 0);
spin_lock(&udc->lock);
} else if ((setup->bRequestType & (USB_RECIP_MASK
| USB_TYPE_MASK)) == (USB_RECIP_DEVICE
| USB_TYPE_STANDARD)) {
/* Note: The driver has not include OTG support yet.
* This will be set when OTG support is added */
if (wValue == USB_DEVICE_TEST_MODE)
ptc = wIndex >> 8;
else if (gadget_is_otg(&udc->gadget)) {
if (setup->bRequest ==
USB_DEVICE_B_HNP_ENABLE)
udc->gadget.b_hnp_enable = 1;
else if (setup->bRequest ==
USB_DEVICE_A_HNP_SUPPORT)
udc->gadget.a_hnp_support = 1;
else if (setup->bRequest ==
USB_DEVICE_A_ALT_HNP_SUPPORT)
udc->gadget.a_alt_hnp_support = 1;
}
rc = 0;
} else
break;
if (rc == 0) {
if (ep0_prime_status(udc, EP_DIR_IN))
ep0stall(udc);
}
if (ptc) {
u32 tmp;
mdelay(10);
tmp = fsl_readl(&dr_regs->portsc1) | (ptc << 16);
fsl_writel(tmp, &dr_regs->portsc1);
printk(KERN_INFO "udc: switch to test mode %d.\n", ptc);
}
return;
}
default:
break;
}
/* Requests handled by gadget */
if (wLength) {
/* Data phase from gadget, status phase from udc */
udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
? USB_DIR_IN : USB_DIR_OUT;
spin_unlock(&udc->lock);
if (udc->driver->setup(&udc->gadget,
&udc->local_setup_buff) < 0)
ep0stall(udc);
spin_lock(&udc->lock);
udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
? DATA_STATE_XMIT : DATA_STATE_RECV;
} else {
/* No data phase, IN status from gadget */
udc->ep0_dir = USB_DIR_IN;
spin_unlock(&udc->lock);
if (udc->driver->setup(&udc->gadget,
&udc->local_setup_buff) < 0)
ep0stall(udc);
spin_lock(&udc->lock);
udc->ep0_state = WAIT_FOR_OUT_STATUS;
}
}
/* Process request for Data or Status phase of ep0
* prime status phase if needed */
static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
struct fsl_req *req)
{
if (udc->usb_state == USB_STATE_ADDRESS) {
/* Set the new address */
u32 new_address = (u32) udc->device_address;
fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
&dr_regs->deviceaddr);
}
done(ep0, req, 0);
switch (udc->ep0_state) {
case DATA_STATE_XMIT:
/* receive status phase */
if (ep0_prime_status(udc, EP_DIR_OUT))
ep0stall(udc);
break;
case DATA_STATE_RECV:
/* send status phase */
if (ep0_prime_status(udc, EP_DIR_IN))
ep0stall(udc);
break;
case WAIT_FOR_OUT_STATUS:
udc->ep0_state = WAIT_FOR_SETUP;
break;
case WAIT_FOR_SETUP:
ERR("Unexpect ep0 packets\n");
break;
default:
ep0stall(udc);
break;
}
}
/* Tripwire mechanism to ensure a setup packet payload is extracted without
* being corrupted by another incoming setup packet */
static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
{
u32 temp;
struct ep_queue_head *qh;
struct fsl_usb2_platform_data *pdata = udc->pdata;
qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
/* Clear bit in ENDPTSETUPSTAT */
temp = fsl_readl(&dr_regs->endptsetupstat);
fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
/* while a hazard exists when setup package arrives */
do {
/* Set Setup Tripwire */
temp = fsl_readl(&dr_regs->usbcmd);
fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
/* Copy the setup packet to local buffer */
if (pdata->le_setup_buf) {
u32 *p = (u32 *)buffer_ptr;
u32 *s = (u32 *)qh->setup_buffer;
/* Convert little endian setup buffer to CPU endian */
*p++ = le32_to_cpu(*s++);
*p = le32_to_cpu(*s);
} else {
memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
}
} while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
/* Clear Setup Tripwire */
temp = fsl_readl(&dr_regs->usbcmd);
fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
}
/* process-ep_req(): free the completed Tds for this req */
static int process_ep_req(struct fsl_udc *udc, int pipe,
struct fsl_req *curr_req)
{
struct ep_td_struct *curr_td;
int td_complete, actual, remaining_length, j, tmp;
int status = 0;
int errors = 0;
struct ep_queue_head *curr_qh = &udc->ep_qh[pipe];
int direction = pipe % 2;
curr_td = curr_req->head;
td_complete = 0;
actual = curr_req->req.length;
for (j = 0; j < curr_req->dtd_count; j++) {
remaining_length = (hc32_to_cpu(curr_td->size_ioc_sts)
& DTD_PACKET_SIZE)
>> DTD_LENGTH_BIT_POS;
actual -= remaining_length;
errors = hc32_to_cpu(curr_td->size_ioc_sts);
if (errors & DTD_ERROR_MASK) {
if (errors & DTD_STATUS_HALTED) {
ERR("dTD error %08x QH=%d\n", errors, pipe);
/* Clear the errors and Halt condition */
tmp = hc32_to_cpu(curr_qh->size_ioc_int_sts);
tmp &= ~errors;
curr_qh->size_ioc_int_sts = cpu_to_hc32(tmp);
status = -EPIPE;
/* FIXME: continue with next queued TD? */
break;
}
if (errors & DTD_STATUS_DATA_BUFF_ERR) {
VDBG("Transfer overflow");
status = -EPROTO;
break;
} else if (errors & DTD_STATUS_TRANSACTION_ERR) {
VDBG("ISO error");
status = -EILSEQ;
break;
} else
ERR("Unknown error has occurred (0x%x)!\n",
errors);
} else if (hc32_to_cpu(curr_td->size_ioc_sts)
& DTD_STATUS_ACTIVE) {
VDBG("Request not complete");
status = REQ_UNCOMPLETE;
return status;
} else if (remaining_length) {
if (direction) {
VDBG("Transmit dTD remaining length not zero");
status = -EPROTO;
break;
} else {
td_complete++;
break;
}
} else {
td_complete++;
VDBG("dTD transmitted successful");
}
if (j != curr_req->dtd_count - 1)
curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
}
if (status)
return status;
curr_req->req.actual = actual;
return 0;
}
/* Process a DTD completion interrupt */
static void dtd_complete_irq(struct fsl_udc *udc)
{
u32 bit_pos;
int i, ep_num, direction, bit_mask, status;
struct fsl_ep *curr_ep;
struct fsl_req *curr_req, *temp_req;
/* Clear the bits in the register */
bit_pos = fsl_readl(&dr_regs->endptcomplete);
fsl_writel(bit_pos, &dr_regs->endptcomplete);
if (!bit_pos)
return;
for (i = 0; i < udc->max_ep * 2; i++) {
ep_num = i >> 1;
direction = i % 2;
bit_mask = 1 << (ep_num + 16 * direction);
if (!(bit_pos & bit_mask))
continue;
curr_ep = get_ep_by_pipe(udc, i);
/* If the ep is configured */
if (curr_ep->name == NULL) {
WARNING("Invalid EP?");
continue;
}
/* process the req queue until an uncomplete request */
list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
queue) {
status = process_ep_req(udc, i, curr_req);
VDBG("status of process_ep_req= %d, ep = %d",
status, ep_num);
if (status == REQ_UNCOMPLETE)
break;
/* write back status to req */
curr_req->req.status = status;
if (ep_num == 0) {
ep0_req_complete(udc, curr_ep, curr_req);
break;
} else
done(curr_ep, curr_req, status);
}
}
}
static inline enum usb_device_speed portscx_device_speed(u32 reg)
{
switch (reg & PORTSCX_PORT_SPEED_MASK) {
case PORTSCX_PORT_SPEED_HIGH:
return USB_SPEED_HIGH;
case PORTSCX_PORT_SPEED_FULL:
return USB_SPEED_FULL;
case PORTSCX_PORT_SPEED_LOW:
return USB_SPEED_LOW;
default:
return USB_SPEED_UNKNOWN;
}
}
/* Process a port change interrupt */
static void port_change_irq(struct fsl_udc *udc)
{
if (udc->bus_reset)
udc->bus_reset = 0;
/* Bus resetting is finished */
if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET))
/* Get the speed */
udc->gadget.speed =
portscx_device_speed(fsl_readl(&dr_regs->portsc1));
/* Update USB state */
if (!udc->resume_state)
udc->usb_state = USB_STATE_DEFAULT;
}
/* Process suspend interrupt */
static void suspend_irq(struct fsl_udc *udc)
{
udc->resume_state = udc->usb_state;
udc->usb_state = USB_STATE_SUSPENDED;
/* report suspend to the driver, serial.c does not support this */
if (udc->driver->suspend)
udc->driver->suspend(&udc->gadget);
}
static void bus_resume(struct fsl_udc *udc)
{
udc->usb_state = udc->resume_state;
udc->resume_state = 0;
/* report resume to the driver, serial.c does not support this */
if (udc->driver->resume)
udc->driver->resume(&udc->gadget);
}
/* Clear up all ep queues */
static int reset_queues(struct fsl_udc *udc)
{
u8 pipe;
for (pipe = 0; pipe < udc->max_pipes; pipe++)
udc_reset_ep_queue(udc, pipe);
/* report disconnect; the driver is already quiesced */
spin_unlock(&udc->lock);
udc->driver->disconnect(&udc->gadget);
spin_lock(&udc->lock);
return 0;
}
/* Process reset interrupt */
static void reset_irq(struct fsl_udc *udc)
{
u32 temp;
unsigned long timeout;
/* Clear the device address */
temp = fsl_readl(&dr_regs->deviceaddr);
fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
udc->device_address = 0;
/* Clear usb state */
udc->resume_state = 0;
udc->ep0_dir = 0;
udc->ep0_state = WAIT_FOR_SETUP;
udc->remote_wakeup = 0; /* default to 0 on reset */
udc->gadget.b_hnp_enable = 0;
udc->gadget.a_hnp_support = 0;
udc->gadget.a_alt_hnp_support = 0;
/* Clear all the setup token semaphores */
temp = fsl_readl(&dr_regs->endptsetupstat);
fsl_writel(temp, &dr_regs->endptsetupstat);
/* Clear all the endpoint complete status bits */
temp = fsl_readl(&dr_regs->endptcomplete);
fsl_writel(temp, &dr_regs->endptcomplete);
timeout = jiffies + 100;
while (fsl_readl(&dr_regs->endpointprime)) {
/* Wait until all endptprime bits cleared */
if (time_after(jiffies, timeout)) {
ERR("Timeout for reset\n");
break;
}
cpu_relax();
}
/* Write 1s to the flush register */
fsl_writel(0xffffffff, &dr_regs->endptflush);
if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
VDBG("Bus reset");
/* Bus is reseting */
udc->bus_reset = 1;
/* Reset all the queues, include XD, dTD, EP queue
* head and TR Queue */
reset_queues(udc);
udc->usb_state = USB_STATE_DEFAULT;
} else {
VDBG("Controller reset");
/* initialize usb hw reg except for regs for EP, not
* touch usbintr reg */
dr_controller_setup(udc);
/* Reset all internal used Queues */
reset_queues(udc);
ep0_setup(udc);
/* Enable DR IRQ reg, Set Run bit, change udc state */
dr_controller_run(udc);
udc->usb_state = USB_STATE_ATTACHED;
}
}
/*
* USB device controller interrupt handler
*/
static irqreturn_t fsl_udc_irq(int irq, void *_udc)
{
struct fsl_udc *udc = _udc;
u32 irq_src;
irqreturn_t status = IRQ_NONE;
unsigned long flags;
/* Disable ISR for OTG host mode */
if (udc->stopped)
return IRQ_NONE;
spin_lock_irqsave(&udc->lock, flags);
irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
/* Clear notification bits */
fsl_writel(irq_src, &dr_regs->usbsts);
/* VDBG("irq_src [0x%8x]", irq_src); */
/* Need to resume? */
if (udc->usb_state == USB_STATE_SUSPENDED)
if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
bus_resume(udc);
/* USB Interrupt */
if (irq_src & USB_STS_INT) {
VDBG("Packet int");
/* Setup package, we only support ep0 as control ep */
if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
tripwire_handler(udc, 0,
(u8 *) (&udc->local_setup_buff));
setup_received_irq(udc, &udc->local_setup_buff);
status = IRQ_HANDLED;
}
/* completion of dtd */
if (fsl_readl(&dr_regs->endptcomplete)) {
dtd_complete_irq(udc);
status = IRQ_HANDLED;
}
}
/* SOF (for ISO transfer) */
if (irq_src & USB_STS_SOF) {
status = IRQ_HANDLED;
}
/* Port Change */
if (irq_src & USB_STS_PORT_CHANGE) {
port_change_irq(udc);
status = IRQ_HANDLED;
}
/* Reset Received */
if (irq_src & USB_STS_RESET) {
VDBG("reset int");
reset_irq(udc);
status = IRQ_HANDLED;
}
/* Sleep Enable (Suspend) */
if (irq_src & USB_STS_SUSPEND) {
suspend_irq(udc);
status = IRQ_HANDLED;
}
if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
VDBG("Error IRQ %x", irq_src);
}
spin_unlock_irqrestore(&udc->lock, flags);
return status;
}
/*----------------------------------------------------------------*
* Hook to gadget drivers
* Called by initialization code of gadget drivers
*----------------------------------------------------------------*/
static int fsl_start(struct usb_gadget_driver *driver,
int (*bind)(struct usb_gadget *))
{
int retval = -ENODEV;
unsigned long flags = 0;
if (!udc_controller)
return -ENODEV;
if (!driver || driver->max_speed < USB_SPEED_FULL
|| !bind || !driver->disconnect || !driver->setup)
return -EINVAL;
if (udc_controller->driver)
return -EBUSY;
/* lock is needed but whether should use this lock or another */
spin_lock_irqsave(&udc_controller->lock, flags);
driver->driver.bus = NULL;
/* hook up the driver */
udc_controller->driver = driver;
udc_controller->gadget.dev.driver = &driver->driver;
spin_unlock_irqrestore(&udc_controller->lock, flags);
/* bind udc driver to gadget driver */
retval = bind(&udc_controller->gadget);
if (retval) {
VDBG("bind to %s --> %d", driver->driver.name, retval);
udc_controller->gadget.dev.driver = NULL;
udc_controller->driver = NULL;
goto out;
}
if (udc_controller->transceiver) {
/* Suspend the controller until OTG enable it */
udc_controller->stopped = 1;
printk(KERN_INFO "Suspend udc for OTG auto detect\n");
/* connect to bus through transceiver */
if (udc_controller->transceiver) {
retval = otg_set_peripheral(udc_controller->transceiver,
&udc_controller->gadget);
if (retval < 0) {
ERR("can't bind to transceiver\n");
driver->unbind(&udc_controller->gadget);
udc_controller->gadget.dev.driver = 0;
udc_controller->driver = 0;
return retval;
}
}
} else {
/* Enable DR IRQ reg and set USBCMD reg Run bit */
dr_controller_run(udc_controller);
udc_controller->usb_state = USB_STATE_ATTACHED;
udc_controller->ep0_state = WAIT_FOR_SETUP;
udc_controller->ep0_dir = 0;
}
printk(KERN_INFO "%s: bind to driver %s\n",
udc_controller->gadget.name, driver->driver.name);
out:
if (retval)
printk(KERN_WARNING "gadget driver register failed %d\n",
retval);
return retval;
}
/* Disconnect from gadget driver */
static int fsl_stop(struct usb_gadget_driver *driver)
{
struct fsl_ep *loop_ep;
unsigned long flags;
if (!udc_controller)
return -ENODEV;
if (!driver || driver != udc_controller->driver || !driver->unbind)
return -EINVAL;
if (udc_controller->transceiver)
otg_set_peripheral(udc_controller->transceiver, NULL);
/* stop DR, disable intr */
dr_controller_stop(udc_controller);
/* in fact, no needed */
udc_controller->usb_state = USB_STATE_ATTACHED;
udc_controller->ep0_state = WAIT_FOR_SETUP;
udc_controller->ep0_dir = 0;
/* stand operation */
spin_lock_irqsave(&udc_controller->lock, flags);
udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
nuke(&udc_controller->eps[0], -ESHUTDOWN);
list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
ep.ep_list)
nuke(loop_ep, -ESHUTDOWN);
spin_unlock_irqrestore(&udc_controller->lock, flags);
/* report disconnect; the controller is already quiesced */
driver->disconnect(&udc_controller->gadget);
/* unbind gadget and unhook driver. */
driver->unbind(&udc_controller->gadget);
udc_controller->gadget.dev.driver = NULL;
udc_controller->driver = NULL;
printk(KERN_WARNING "unregistered gadget driver '%s'\n",
driver->driver.name);
return 0;
}
/*-------------------------------------------------------------------------
PROC File System Support
-------------------------------------------------------------------------*/
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
#include <linux/seq_file.h>
static const char proc_filename[] = "driver/fsl_usb2_udc";
static int fsl_proc_read(char *page, char **start, off_t off, int count,
int *eof, void *_dev)
{
char *buf = page;
char *next = buf;
unsigned size = count;
unsigned long flags;
int t, i;
u32 tmp_reg;
struct fsl_ep *ep = NULL;
struct fsl_req *req;
struct fsl_udc *udc = udc_controller;
if (off != 0)
return 0;
spin_lock_irqsave(&udc->lock, flags);
/* ------basic driver information ---- */
t = scnprintf(next, size,
DRIVER_DESC "\n"
"%s version: %s\n"
"Gadget driver: %s\n\n",
driver_name, DRIVER_VERSION,
udc->driver ? udc->driver->driver.name : "(none)");
size -= t;
next += t;
/* ------ DR Registers ----- */
tmp_reg = fsl_readl(&dr_regs->usbcmd);
t = scnprintf(next, size,
"USBCMD reg:\n"
"SetupTW: %d\n"
"Run/Stop: %s\n\n",
(tmp_reg & USB_CMD_SUTW) ? 1 : 0,
(tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->usbsts);
t = scnprintf(next, size,
"USB Status Reg:\n"
"Dr Suspend: %d Reset Received: %d System Error: %s "
"USB Error Interrupt: %s\n\n",
(tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
(tmp_reg & USB_STS_RESET) ? 1 : 0,
(tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
(tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->usbintr);
t = scnprintf(next, size,
"USB Intrrupt Enable Reg:\n"
"Sleep Enable: %d SOF Received Enable: %d "
"Reset Enable: %d\n"
"System Error Enable: %d "
"Port Change Dectected Enable: %d\n"
"USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
(tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
(tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
(tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
(tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
(tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
(tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
(tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->frindex);
t = scnprintf(next, size,
"USB Frame Index Reg: Frame Number is 0x%x\n\n",
(tmp_reg & USB_FRINDEX_MASKS));
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->deviceaddr);
t = scnprintf(next, size,
"USB Device Address Reg: Device Addr is 0x%x\n\n",
(tmp_reg & USB_DEVICE_ADDRESS_MASK));
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
t = scnprintf(next, size,
"USB Endpoint List Address Reg: "
"Device Addr is 0x%x\n\n",
(tmp_reg & USB_EP_LIST_ADDRESS_MASK));
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->portsc1);
t = scnprintf(next, size,
"USB Port Status&Control Reg:\n"
"Port Transceiver Type : %s Port Speed: %s\n"
"PHY Low Power Suspend: %s Port Reset: %s "
"Port Suspend Mode: %s\n"
"Over-current Change: %s "
"Port Enable/Disable Change: %s\n"
"Port Enabled/Disabled: %s "
"Current Connect Status: %s\n\n", ( {
char *s;
switch (tmp_reg & PORTSCX_PTS_FSLS) {
case PORTSCX_PTS_UTMI:
s = "UTMI"; break;
case PORTSCX_PTS_ULPI:
s = "ULPI "; break;
case PORTSCX_PTS_FSLS:
s = "FS/LS Serial"; break;
default:
s = "None"; break;
}
s;} ),
usb_speed_string(portscx_device_speed(tmp_reg)),
(tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
"Normal PHY mode" : "Low power mode",
(tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
"Not in Reset",
(tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
(tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
"No",
(tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
"Not change",
(tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
"Not correct",
(tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
"Attached" : "Not-Att");
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->usbmode);
t = scnprintf(next, size,
"USB Mode Reg: Controller Mode is: %s\n\n", ( {
char *s;
switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
case USB_MODE_CTRL_MODE_IDLE:
s = "Idle"; break;
case USB_MODE_CTRL_MODE_DEVICE:
s = "Device Controller"; break;
case USB_MODE_CTRL_MODE_HOST:
s = "Host Controller"; break;
default:
s = "None"; break;
}
s;
} ));
size -= t;
next += t;
tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
t = scnprintf(next, size,
"Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
(tmp_reg & EP_SETUP_STATUS_MASK));
size -= t;
next += t;
for (i = 0; i < udc->max_ep / 2; i++) {
tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
i, tmp_reg);
size -= t;
next += t;
}
tmp_reg = fsl_readl(&dr_regs->endpointprime);
t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
size -= t;
next += t;
#ifndef CONFIG_ARCH_MXC
if (udc->pdata->have_sysif_regs) {
tmp_reg = usb_sys_regs->snoop1;
t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
size -= t;
next += t;
tmp_reg = usb_sys_regs->control;
t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
tmp_reg);
size -= t;
next += t;
}
#endif
/* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
ep = &udc->eps[0];
t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
ep->ep.name, ep_maxpacket(ep), ep_index(ep));
size -= t;
next += t;
if (list_empty(&ep->queue)) {
t = scnprintf(next, size, "its req queue is empty\n\n");
size -= t;
next += t;
} else {
list_for_each_entry(req, &ep->queue, queue) {
t = scnprintf(next, size,
"req %p actual 0x%x length 0x%x buf %p\n",
&req->req, req->req.actual,
req->req.length, req->req.buf);
size -= t;
next += t;
}
}
/* other gadget->eplist ep */
list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
if (ep->desc) {
t = scnprintf(next, size,
"\nFor %s Maxpkt is 0x%x "
"index is 0x%x\n",
ep->ep.name, ep_maxpacket(ep),
ep_index(ep));
size -= t;
next += t;
if (list_empty(&ep->queue)) {
t = scnprintf(next, size,
"its req queue is empty\n\n");
size -= t;
next += t;
} else {
list_for_each_entry(req, &ep->queue, queue) {
t = scnprintf(next, size,
"req %p actual 0x%x length "
"0x%x buf %p\n",
&req->req, req->req.actual,
req->req.length, req->req.buf);
size -= t;
next += t;
} /* end for each_entry of ep req */
} /* end for else */
} /* end for if(ep->queue) */
} /* end (ep->desc) */
spin_unlock_irqrestore(&udc->lock, flags);
*eof = 1;
return count - size;
}
#define create_proc_file() create_proc_read_entry(proc_filename, \
0, NULL, fsl_proc_read, NULL)
#define remove_proc_file() remove_proc_entry(proc_filename, NULL)
#else /* !CONFIG_USB_GADGET_DEBUG_FILES */
#define create_proc_file() do {} while (0)
#define remove_proc_file() do {} while (0)
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
/*-------------------------------------------------------------------------*/
/* Release udc structures */
static void fsl_udc_release(struct device *dev)
{
complete(udc_controller->done);
dma_free_coherent(dev->parent, udc_controller->ep_qh_size,
udc_controller->ep_qh, udc_controller->ep_qh_dma);
kfree(udc_controller);
}
/******************************************************************
Internal structure setup functions
*******************************************************************/
/*------------------------------------------------------------------
* init resource for globle controller
* Return the udc handle on success or NULL on failure
------------------------------------------------------------------*/
static int __init struct_udc_setup(struct fsl_udc *udc,
struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata;
size_t size;
pdata = pdev->dev.platform_data;
udc->phy_mode = pdata->phy_mode;
udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
if (!udc->eps) {
ERR("malloc fsl_ep failed\n");
return -1;
}
/* initialized QHs, take care of alignment */
size = udc->max_ep * sizeof(struct ep_queue_head);
if (size < QH_ALIGNMENT)
size = QH_ALIGNMENT;
else if ((size % QH_ALIGNMENT) != 0) {
size += QH_ALIGNMENT + 1;
size &= ~(QH_ALIGNMENT - 1);
}
udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
&udc->ep_qh_dma, GFP_KERNEL);
if (!udc->ep_qh) {
ERR("malloc QHs for udc failed\n");
kfree(udc->eps);
return -1;
}
udc->ep_qh_size = size;
/* Initialize ep0 status request structure */
/* FIXME: fsl_alloc_request() ignores ep argument */
udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
struct fsl_req, req);
/* allocate a small amount of memory to get valid address */
udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
udc->resume_state = USB_STATE_NOTATTACHED;
udc->usb_state = USB_STATE_POWERED;
udc->ep0_dir = 0;
udc->remote_wakeup = 0; /* default to 0 on reset */
return 0;
}
/*----------------------------------------------------------------
* Setup the fsl_ep struct for eps
* Link fsl_ep->ep to gadget->ep_list
* ep0out is not used so do nothing here
* ep0in should be taken care
*--------------------------------------------------------------*/
static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
char *name, int link)
{
struct fsl_ep *ep = &udc->eps[index];
ep->udc = udc;
strcpy(ep->name, name);
ep->ep.name = ep->name;
ep->ep.ops = &fsl_ep_ops;
ep->stopped = 0;
/* for ep0: maxP defined in desc
* for other eps, maxP is set by epautoconfig() called by gadget layer
*/
ep->ep.maxpacket = (unsigned short) ~0;
/* the queue lists any req for this ep */
INIT_LIST_HEAD(&ep->queue);
/* gagdet.ep_list used for ep_autoconfig so no ep0 */
if (link)
list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
ep->gadget = &udc->gadget;
ep->qh = &udc->ep_qh[index];
return 0;
}
/* Driver probe function
* all intialization operations implemented here except enabling usb_intr reg
* board setup should have been done in the platform code
*/
static int __init fsl_udc_probe(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata;
struct resource *res;
int ret = -ENODEV;
unsigned int i;
u32 dccparams;
if (strcmp(pdev->name, driver_name)) {
VDBG("Wrong device");
return -ENODEV;
}
udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
if (udc_controller == NULL) {
ERR("malloc udc failed\n");
return -ENOMEM;
}
pdata = pdev->dev.platform_data;
udc_controller->pdata = pdata;
spin_lock_init(&udc_controller->lock);
udc_controller->stopped = 1;
#ifdef CONFIG_USB_OTG
if (pdata->operating_mode == FSL_USB2_DR_OTG) {
udc_controller->transceiver = otg_get_transceiver();
if (!udc_controller->transceiver) {
ERR("Can't find OTG driver!\n");
ret = -ENODEV;
goto err_kfree;
}
}
#endif
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENXIO;
goto err_kfree;
}
if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
if (!request_mem_region(res->start, resource_size(res),
driver_name)) {
ERR("request mem region for %s failed\n", pdev->name);
ret = -EBUSY;
goto err_kfree;
}
}
dr_regs = ioremap(res->start, resource_size(res));
if (!dr_regs) {
ret = -ENOMEM;
goto err_release_mem_region;
}
pdata->regs = (void *)dr_regs;
/*
* do platform specific init: check the clock, grab/config pins, etc.
*/
if (pdata->init && pdata->init(pdev)) {
ret = -ENODEV;
goto err_iounmap_noclk;
}
/* Set accessors only after pdata->init() ! */
fsl_set_accessors(pdata);
#ifndef CONFIG_ARCH_MXC
if (pdata->have_sysif_regs)
usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
#endif
/* Initialize USB clocks */
ret = fsl_udc_clk_init(pdev);
if (ret < 0)
goto err_iounmap_noclk;
/* Read Device Controller Capability Parameters register */
dccparams = fsl_readl(&dr_regs->dccparams);
if (!(dccparams & DCCPARAMS_DC)) {
ERR("This SOC doesn't support device role\n");
ret = -ENODEV;
goto err_iounmap;
}
/* Get max device endpoints */
/* DEN is bidirectional ep number, max_ep doubles the number */
udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
udc_controller->irq = platform_get_irq(pdev, 0);
if (!udc_controller->irq) {
ret = -ENODEV;
goto err_iounmap;
}
ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
driver_name, udc_controller);
if (ret != 0) {
ERR("cannot request irq %d err %d\n",
udc_controller->irq, ret);
goto err_iounmap;
}
/* Initialize the udc structure including QH member and other member */
if (struct_udc_setup(udc_controller, pdev)) {
ERR("Can't initialize udc data structure\n");
ret = -ENOMEM;
goto err_free_irq;
}
if (!udc_controller->transceiver) {
/* initialize usb hw reg except for regs for EP,
* leave usbintr reg untouched */
dr_controller_setup(udc_controller);
}
fsl_udc_clk_finalize(pdev);
/* Setup gadget structure */
udc_controller->gadget.ops = &fsl_gadget_ops;
udc_controller->gadget.max_speed = USB_SPEED_HIGH;
udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
udc_controller->gadget.name = driver_name;
/* Setup gadget.dev and register with kernel */
dev_set_name(&udc_controller->gadget.dev, "gadget");
udc_controller->gadget.dev.release = fsl_udc_release;
udc_controller->gadget.dev.parent = &pdev->dev;
ret = device_register(&udc_controller->gadget.dev);
if (ret < 0)
goto err_free_irq;
if (udc_controller->transceiver)
udc_controller->gadget.is_otg = 1;
/* setup QH and epctrl for ep0 */
ep0_setup(udc_controller);
/* setup udc->eps[] for ep0 */
struct_ep_setup(udc_controller, 0, "ep0", 0);
/* for ep0: the desc defined here;
* for other eps, gadget layer called ep_enable with defined desc
*/
udc_controller->eps[0].desc = &fsl_ep0_desc;
udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
/* setup the udc->eps[] for non-control endpoints and link
* to gadget.ep_list */
for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
char name[14];
sprintf(name, "ep%dout", i);
struct_ep_setup(udc_controller, i * 2, name, 1);
sprintf(name, "ep%din", i);
struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
}
/* use dma_pool for TD management */
udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
sizeof(struct ep_td_struct),
DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
if (udc_controller->td_pool == NULL) {
ret = -ENOMEM;
goto err_unregister;
}
ret = usb_add_gadget_udc(&pdev->dev, &udc_controller->gadget);
if (ret)
goto err_del_udc;
create_proc_file();
return 0;
err_del_udc:
dma_pool_destroy(udc_controller->td_pool);
err_unregister:
device_unregister(&udc_controller->gadget.dev);
err_free_irq:
free_irq(udc_controller->irq, udc_controller);
err_iounmap:
if (pdata->exit)
pdata->exit(pdev);
fsl_udc_clk_release();
err_iounmap_noclk:
iounmap(dr_regs);
err_release_mem_region:
if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
release_mem_region(res->start, resource_size(res));
err_kfree:
kfree(udc_controller);
udc_controller = NULL;
return ret;
}
/* Driver removal function
* Free resources and finish pending transactions
*/
static int __exit fsl_udc_remove(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
DECLARE_COMPLETION(done);
if (!udc_controller)
return -ENODEV;
usb_del_gadget_udc(&udc_controller->gadget);
udc_controller->done = &done;
fsl_udc_clk_release();
/* DR has been stopped in usb_gadget_unregister_driver() */
remove_proc_file();
/* Free allocated memory */
kfree(udc_controller->status_req->req.buf);
kfree(udc_controller->status_req);
kfree(udc_controller->eps);
dma_pool_destroy(udc_controller->td_pool);
free_irq(udc_controller->irq, udc_controller);
iounmap(dr_regs);
if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
release_mem_region(res->start, resource_size(res));
device_unregister(&udc_controller->gadget.dev);
/* free udc --wait for the release() finished */
wait_for_completion(&done);
/*
* do platform specific un-initialization:
* release iomux pins, etc.
*/
if (pdata->exit)
pdata->exit(pdev);
return 0;
}
/*-----------------------------------------------------------------
* Modify Power management attributes
* Used by OTG statemachine to disable gadget temporarily
-----------------------------------------------------------------*/
static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
{
dr_controller_stop(udc_controller);
return 0;
}
/*-----------------------------------------------------------------
* Invoked on USB resume. May be called in_interrupt.
* Here we start the DR controller and enable the irq
*-----------------------------------------------------------------*/
static int fsl_udc_resume(struct platform_device *pdev)
{
/* Enable DR irq reg and set controller Run */
if (udc_controller->stopped) {
dr_controller_setup(udc_controller);
dr_controller_run(udc_controller);
}
udc_controller->usb_state = USB_STATE_ATTACHED;
udc_controller->ep0_state = WAIT_FOR_SETUP;
udc_controller->ep0_dir = 0;
return 0;
}
static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
{
struct fsl_udc *udc = udc_controller;
u32 mode, usbcmd;
mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
/*
* If the controller is already stopped, then this must be a
* PM suspend. Remember this fact, so that we will leave the
* controller stopped at PM resume time.
*/
if (udc->stopped) {
pr_debug("gadget already stopped, leaving early\n");
udc->already_stopped = 1;
return 0;
}
if (mode != USB_MODE_CTRL_MODE_DEVICE) {
pr_debug("gadget not in device mode, leaving early\n");
return 0;
}
/* stop the controller */
usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
fsl_writel(usbcmd, &dr_regs->usbcmd);
udc->stopped = 1;
pr_info("USB Gadget suspended\n");
return 0;
}
static int fsl_udc_otg_resume(struct device *dev)
{
pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
udc_controller->stopped, udc_controller->already_stopped);
/*
* If the controller was stopped at suspend time, then
* don't resume it now.
*/
if (udc_controller->already_stopped) {
udc_controller->already_stopped = 0;
pr_debug("gadget was already stopped, leaving early\n");
return 0;
}
pr_info("USB Gadget resume\n");
return fsl_udc_resume(NULL);
}
/*-------------------------------------------------------------------------
Register entry point for the peripheral controller driver
--------------------------------------------------------------------------*/
static struct platform_driver udc_driver = {
.remove = __exit_p(fsl_udc_remove),
/* these suspend and resume are not usb suspend and resume */
.suspend = fsl_udc_suspend,
.resume = fsl_udc_resume,
.driver = {
.name = (char *)driver_name,
.owner = THIS_MODULE,
/* udc suspend/resume called from OTG driver */
.suspend = fsl_udc_otg_suspend,
.resume = fsl_udc_otg_resume,
},
};
static int __init udc_init(void)
{
printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
return platform_driver_probe(&udc_driver, fsl_udc_probe);
}
module_init(udc_init);
static void __exit udc_exit(void)
{
platform_driver_unregister(&udc_driver);
printk(KERN_WARNING "%s unregistered\n", driver_desc);
}
module_exit(udc_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:fsl-usb2-udc");
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