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android_kernel_xiaomi_sm8350/drivers/usb/host/r8a66597-hcd.c
Alan Stern 442258e2ff USB: use IRQF_DISABLED for HCD interrupt handlers 
Host controller IRQs are supposed to be serviced with interrupts
disabled.  This patch (as1026) adds an IRQF_DISABLED flag to all the
controller drivers that lack it.  It also replaces the
spin_lock_irqsave() and spin_unlock_irqrestore() calls in uhci_irq()
with simple spin_lock() and spin_unlock().

This fixes Bugzilla #9335.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-12-17 10:47:15 -08:00

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/*
* R8A66597 HCD (Host Controller Driver)
*
* Copyright (C) 2006-2007 Renesas Solutions Corp.
* Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
* Portions Copyright (C) 2004-2005 David Brownell
* Portions Copyright (C) 1999 Roman Weissgaerber
*
* Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
*
* 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/irq.h>
#include "../core/hcd.h"
#include "r8a66597.h"
MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yoshihiro Shimoda");
#define DRIVER_VERSION "29 May 2007"
static const char hcd_name[] = "r8a66597_hcd";
/* module parameters */
static unsigned short clock = XTAL12;
module_param(clock, ushort, 0644);
MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
"(default=0)");
static unsigned short vif = LDRV;
module_param(vif, ushort, 0644);
MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)");
static unsigned short endian;
module_param(endian, ushort, 0644);
MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)");
static unsigned short irq_sense = INTL;
module_param(irq_sense, ushort, 0644);
MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=32, falling edge=0 "
"(default=32)");
static void packet_write(struct r8a66597 *r8a66597, u16 pipenum);
static int r8a66597_get_frame(struct usb_hcd *hcd);
/* this function must be called with interrupt disabled */
static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
unsigned long reg)
{
u16 tmp;
tmp = r8a66597_read(r8a66597, INTENB0);
r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
r8a66597_bset(r8a66597, 1 << pipenum, reg);
r8a66597_write(r8a66597, tmp, INTENB0);
}
/* this function must be called with interrupt disabled */
static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
unsigned long reg)
{
u16 tmp;
tmp = r8a66597_read(r8a66597, INTENB0);
r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
r8a66597_bclr(r8a66597, 1 << pipenum, reg);
r8a66597_write(r8a66597, tmp, INTENB0);
}
static void set_devadd_reg(struct r8a66597 *r8a66597, u8 r8a66597_address,
u16 usbspd, u8 upphub, u8 hubport, int port)
{
u16 val;
unsigned long devadd_reg = get_devadd_addr(r8a66597_address);
val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001);
r8a66597_write(r8a66597, val, devadd_reg);
}
static int enable_controller(struct r8a66597 *r8a66597)
{
u16 tmp;
int i = 0;
do {
r8a66597_write(r8a66597, USBE, SYSCFG0);
tmp = r8a66597_read(r8a66597, SYSCFG0);
if (i++ > 1000) {
err("register access fail.");
return -ENXIO;
}
} while ((tmp & USBE) != USBE);
r8a66597_bclr(r8a66597, USBE, SYSCFG0);
r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0);
i = 0;
r8a66597_bset(r8a66597, XCKE, SYSCFG0);
do {
msleep(1);
tmp = r8a66597_read(r8a66597, SYSCFG0);
if (i++ > 500) {
err("register access fail.");
return -ENXIO;
}
} while ((tmp & SCKE) != SCKE);
r8a66597_bset(r8a66597, DCFM | DRPD, SYSCFG0);
r8a66597_bset(r8a66597, DRPD, SYSCFG1);
r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
r8a66597_bset(r8a66597, HSE, SYSCFG0);
r8a66597_bset(r8a66597, HSE, SYSCFG1);
r8a66597_bset(r8a66597, USBE, SYSCFG0);
r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
r8a66597_bset(r8a66597, BRDY0, BRDYENB);
r8a66597_bset(r8a66597, BEMP0, BEMPENB);
r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA0CFG);
r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA1CFG);
r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);
r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);
r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
r8a66597_bclr(r8a66597, DTCHE, INTENB1);
r8a66597_bset(r8a66597, ATTCHE, INTENB1);
r8a66597_bclr(r8a66597, DTCHE, INTENB2);
r8a66597_bset(r8a66597, ATTCHE, INTENB2);
return 0;
}
static void disable_controller(struct r8a66597 *r8a66597)
{
u16 tmp;
r8a66597_write(r8a66597, 0, INTENB0);
r8a66597_write(r8a66597, 0, INTENB1);
r8a66597_write(r8a66597, 0, INTENB2);
r8a66597_write(r8a66597, 0, INTSTS0);
r8a66597_write(r8a66597, 0, INTSTS1);
r8a66597_write(r8a66597, 0, INTSTS2);
r8a66597_port_power(r8a66597, 0, 0);
r8a66597_port_power(r8a66597, 1, 0);
do {
tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
udelay(640);
} while (tmp == EDGESTS);
r8a66597_bclr(r8a66597, DCFM | DRPD, SYSCFG0);
r8a66597_bclr(r8a66597, DRPD, SYSCFG1);
r8a66597_bclr(r8a66597, HSE, SYSCFG0);
r8a66597_bclr(r8a66597, HSE, SYSCFG1);
r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
udelay(1);
r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
r8a66597_bclr(r8a66597, USBE, SYSCFG0);
}
static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
struct usb_device *udev)
{
struct r8a66597_device *dev;
if (udev->parent && udev->parent->devnum != 1)
udev = udev->parent;
dev = dev_get_drvdata(&udev->dev);
if (dev)
return dev->address;
else
return 0;
}
static int is_child_device(char *devpath)
{
return (devpath[2] ? 1 : 0);
}
static int is_hub_limit(char *devpath)
{
return ((strlen(devpath) >= 4) ? 1 : 0);
}
static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
{
if (root_port) {
*root_port = (devpath[0] & 0x0F) - 1;
if (*root_port >= R8A66597_MAX_ROOT_HUB)
err("illegal root port number");
}
if (hub_port)
*hub_port = devpath[2] & 0x0F;
}
static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
{
u16 usbspd = 0;
switch (speed) {
case USB_SPEED_LOW:
usbspd = LSMODE;
break;
case USB_SPEED_FULL:
usbspd = FSMODE;
break;
case USB_SPEED_HIGH:
usbspd = HSMODE;
break;
default:
err("unknown speed");
break;
}
return usbspd;
}
static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
{
int idx;
idx = address / 32;
r8a66597->child_connect_map[idx] |= 1 << (address % 32);
}
static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
{
int idx;
idx = address / 32;
r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
}
static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
{
u16 pipenum = pipe->info.pipenum;
unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};
if (dma_ch > R8A66597_PIPE_NO_DMA) /* dma fifo not use? */
dma_ch = R8A66597_PIPE_NO_DMA;
pipe->fifoaddr = fifoaddr[dma_ch];
pipe->fifosel = fifosel[dma_ch];
pipe->fifoctr = fifoctr[dma_ch];
if (pipenum == 0)
pipe->pipectr = DCPCTR;
else
pipe->pipectr = get_pipectr_addr(pipenum);
if (check_bulk_or_isoc(pipenum)) {
pipe->pipetre = get_pipetre_addr(pipenum);
pipe->pipetrn = get_pipetrn_addr(pipenum);
} else {
pipe->pipetre = 0;
pipe->pipetrn = 0;
}
}
static struct r8a66597_device *
get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
{
if (usb_pipedevice(urb->pipe) == 0)
return &r8a66597->device0;
return dev_get_drvdata(&urb->dev->dev);
}
static int make_r8a66597_device(struct r8a66597 *r8a66597,
struct urb *urb, u8 addr)
{
struct r8a66597_device *dev;
int usb_address = urb->setup_packet[2]; /* urb->pipe is address 0 */
dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
if (dev == NULL)
return -ENOMEM;
dev_set_drvdata(&urb->dev->dev, dev);
dev->udev = urb->dev;
dev->address = addr;
dev->usb_address = usb_address;
dev->state = USB_STATE_ADDRESS;
dev->ep_in_toggle = 0;
dev->ep_out_toggle = 0;
INIT_LIST_HEAD(&dev->device_list);
list_add_tail(&dev->device_list, &r8a66597->child_device);
get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
if (!is_child_device(urb->dev->devpath))
r8a66597->root_hub[dev->root_port].dev = dev;
set_devadd_reg(r8a66597, dev->address,
get_r8a66597_usb_speed(urb->dev->speed),
get_parent_r8a66597_address(r8a66597, urb->dev),
dev->hub_port, dev->root_port);
return 0;
}
/* this function must be called with interrupt disabled */
static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
{
u8 addr; /* R8A66597's address */
struct r8a66597_device *dev;
if (is_hub_limit(urb->dev->devpath)) {
err("Externel hub limit reached.");
return 0;
}
dev = get_urb_to_r8a66597_dev(r8a66597, urb);
if (dev && dev->state >= USB_STATE_ADDRESS)
return dev->address;
for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
if (r8a66597->address_map & (1 << addr))
continue;
dbg("alloc_address: r8a66597_addr=%d", addr);
r8a66597->address_map |= 1 << addr;
if (make_r8a66597_device(r8a66597, urb, addr) < 0)
return 0;
return addr;
}
err("cannot communicate with a USB device more than 10.(%x)",
r8a66597->address_map);
return 0;
}
/* this function must be called with interrupt disabled */
static void free_usb_address(struct r8a66597 *r8a66597,
struct r8a66597_device *dev)
{
int port;
if (!dev)
return;
dbg("free_addr: addr=%d", dev->address);
dev->state = USB_STATE_DEFAULT;
r8a66597->address_map &= ~(1 << dev->address);
dev->address = 0;
dev_set_drvdata(&dev->udev->dev, NULL);
list_del(&dev->device_list);
kfree(dev);
for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
if (r8a66597->root_hub[port].dev == dev) {
r8a66597->root_hub[port].dev = NULL;
break;
}
}
}
static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
u16 mask, u16 loop)
{
u16 tmp;
int i = 0;
do {
tmp = r8a66597_read(r8a66597, reg);
if (i++ > 1000000) {
err("register%lx, loop %x is timeout", reg, loop);
break;
}
ndelay(1);
} while ((tmp & mask) != loop);
}
/* this function must be called with interrupt disabled */
static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
u16 tmp;
tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
}
/* this function must be called with interrupt disabled */
static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
u16 tmp;
tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
if ((tmp & PID_STALL11) != PID_STALL11) /* force stall? */
r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
}
/* this function must be called with interrupt disabled */
static void clear_all_buffer(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe)
{
u16 tmp;
if (!pipe || pipe->info.pipenum == 0)
return;
pipe_stop(r8a66597, pipe);
r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
tmp = r8a66597_read(r8a66597, pipe->pipectr);
tmp = r8a66597_read(r8a66597, pipe->pipectr);
tmp = r8a66597_read(r8a66597, pipe->pipectr);
r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
}
/* this function must be called with interrupt disabled */
static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe, int toggle)
{
if (toggle)
r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
else
r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
}
/* this function must be called with interrupt disabled */
static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
{
r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
}
/* this function must be called with interrupt disabled */
static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe)
{
cfifo_change(r8a66597, 0);
r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);
r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
pipe->fifosel);
r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
}
static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
{
struct r8a66597_pipe *pipe = hep->hcpriv;
if (usb_pipeendpoint(urb->pipe) == 0)
return 0;
else
return pipe->info.pipenum;
}
static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
{
struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
}
static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
int urb_pipe)
{
if (!dev)
return NULL;
return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
}
/* this function must be called with interrupt disabled */
static void pipe_toggle_set(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe,
struct urb *urb, int set)
{
struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
unsigned char endpoint = usb_pipeendpoint(urb->pipe);
unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
if (!toggle)
return;
if (set)
*toggle |= 1 << endpoint;
else
*toggle &= ~(1 << endpoint);
}
/* this function must be called with interrupt disabled */
static void pipe_toggle_save(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe,
struct urb *urb)
{
if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
pipe_toggle_set(r8a66597, pipe, urb, 1);
else
pipe_toggle_set(r8a66597, pipe, urb, 0);
}
/* this function must be called with interrupt disabled */
static void pipe_toggle_restore(struct r8a66597 *r8a66597,
struct r8a66597_pipe *pipe,
struct urb *urb)
{
struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
unsigned char endpoint = usb_pipeendpoint(urb->pipe);
unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
if (!toggle)
return;
r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
}
/* this function must be called with interrupt disabled */
static void pipe_buffer_setting(struct r8a66597 *r8a66597,
struct r8a66597_pipe_info *info)
{
u16 val = 0;
if (info->pipenum == 0)
return;
r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
r8a66597_write(r8a66597, info->pipenum, PIPESEL);
if (!info->dir_in)
val |= R8A66597_DIR;
if (info->type == R8A66597_BULK && info->dir_in)
val |= R8A66597_DBLB | R8A66597_SHTNAK;
val |= info->type | info->epnum;
r8a66597_write(r8a66597, val, PIPECFG);
r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
PIPEBUF);
r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
PIPEMAXP);
if (info->interval)
info->interval--;
r8a66597_write(r8a66597, info->interval, PIPEPERI);
}
/* this function must be called with interrupt disabled */
static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
struct r8a66597_pipe_info *info;
struct urb *urb = td->urb;
if (td->pipenum > 0) {
info = &td->pipe->info;
cfifo_change(r8a66597, 0);
pipe_buffer_setting(r8a66597, info);
if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe)) &&
!usb_pipecontrol(urb->pipe)) {
r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
pipe_toggle_set(r8a66597, td->pipe, urb, 0);
clear_all_buffer(r8a66597, td->pipe);
usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe), 1);
}
pipe_toggle_restore(r8a66597, td->pipe, urb);
}
}
/* this function must be called with interrupt disabled */
static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
struct usb_endpoint_descriptor *ep)
{
u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;
memset(array, 0, sizeof(array));
switch (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
case USB_ENDPOINT_XFER_BULK:
if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
array[i++] = 4;
else {
array[i++] = 3;
array[i++] = 5;
}
break;
case USB_ENDPOINT_XFER_INT:
if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
array[i++] = 6;
array[i++] = 7;
array[i++] = 8;
} else
array[i++] = 9;
break;
case USB_ENDPOINT_XFER_ISOC:
if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
array[i++] = 2;
else
array[i++] = 1;
break;
default:
err("Illegal type");
return 0;
}
i = 1;
min = array[0];
while (array[i] != 0) {
if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
min = array[i];
i++;
}
return min;
}
static u16 get_r8a66597_type(__u8 type)
{
u16 r8a66597_type;
switch (type) {
case USB_ENDPOINT_XFER_BULK:
r8a66597_type = R8A66597_BULK;
break;
case USB_ENDPOINT_XFER_INT:
r8a66597_type = R8A66597_INT;
break;
case USB_ENDPOINT_XFER_ISOC:
r8a66597_type = R8A66597_ISO;
break;
default:
err("Illegal type");
r8a66597_type = 0x0000;
break;
}
return r8a66597_type;
}
static u16 get_bufnum(u16 pipenum)
{
u16 bufnum = 0;
if (pipenum == 0)
bufnum = 0;
else if (check_bulk_or_isoc(pipenum))
bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
else if (check_interrupt(pipenum))
bufnum = 4 + (pipenum - 6);
else
err("Illegal pipenum (%d)", pipenum);
return bufnum;
}
static u16 get_buf_bsize(u16 pipenum)
{
u16 buf_bsize = 0;
if (pipenum == 0)
buf_bsize = 3;
else if (check_bulk_or_isoc(pipenum))
buf_bsize = R8A66597_BUF_BSIZE - 1;
else if (check_interrupt(pipenum))
buf_bsize = 0;
else
err("Illegal pipenum (%d)", pipenum);
return buf_bsize;
}
/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
struct r8a66597_device *dev,
struct r8a66597_pipe *pipe,
struct urb *urb)
{
int i;
struct r8a66597_pipe_info *info = &pipe->info;
if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
if ((r8a66597->dma_map & (1 << i)) != 0)
continue;
info("address %d, EndpointAddress 0x%02x use DMA FIFO",
usb_pipedevice(urb->pipe),
info->dir_in ? USB_ENDPOINT_DIR_MASK + info->epnum
: info->epnum);
r8a66597->dma_map |= 1 << i;
dev->dma_map |= 1 << i;
set_pipe_reg_addr(pipe, i);
cfifo_change(r8a66597, 0);
r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
MBW | CURPIPE, pipe->fifosel);
r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
pipe->info.pipenum);
r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
break;
}
}
}
/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
struct usb_host_endpoint *hep,
struct r8a66597_pipe_info *info)
{
struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
struct r8a66597_pipe *pipe = hep->hcpriv;
dbg("enable_pipe:");
pipe->info = *info;
set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
r8a66597->pipe_cnt[pipe->info.pipenum]++;
dev->pipe_cnt[pipe->info.pipenum]++;
enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
}
/* this function must be called with interrupt disabled */
static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
{
struct r8a66597_td *td, *next;
struct urb *urb;
struct list_head *list = &r8a66597->pipe_queue[pipenum];
if (list_empty(list))
return;
list_for_each_entry_safe(td, next, list, queue) {
if (!td)
continue;
if (td->address != address)
continue;
urb = td->urb;
list_del(&td->queue);
kfree(td);
if (urb) {
usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
urb);
spin_unlock(&r8a66597->lock);
usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb,
-ENODEV);
spin_lock(&r8a66597->lock);
}
break;
}
}
/* this function must be called with interrupt disabled */
static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
struct r8a66597_device *dev)
{
int check_ep0 = 0;
u16 pipenum;
if (!dev)
return;
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
if (!dev->pipe_cnt[pipenum])
continue;
if (!check_ep0) {
check_ep0 = 1;
force_dequeue(r8a66597, 0, dev->address);
}
r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
dev->pipe_cnt[pipenum] = 0;
force_dequeue(r8a66597, pipenum, dev->address);
}
dbg("disable_pipe");
r8a66597->dma_map &= ~(dev->dma_map);
dev->dma_map = 0;
}
/* this function must be called with interrupt disabled */
static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
struct usb_host_endpoint *hep,
struct usb_endpoint_descriptor *ep)
{
struct r8a66597_pipe_info info;
info.pipenum = get_empty_pipenum(r8a66597, ep);
info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
info.epnum = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
info.type = get_r8a66597_type(ep->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK);
info.bufnum = get_bufnum(info.pipenum);
info.buf_bsize = get_buf_bsize(info.pipenum);
info.interval = ep->bInterval;
if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
info.dir_in = 1;
else
info.dir_in = 0;
enable_r8a66597_pipe(r8a66597, urb, hep, &info);
}
static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
struct r8a66597_device *dev;
dev = get_urb_to_r8a66597_dev(r8a66597, urb);
dev->state = USB_STATE_CONFIGURED;
}
static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
u16 pipenum)
{
if (pipenum == 0 && usb_pipeout(urb->pipe))
enable_irq_empty(r8a66597, pipenum);
else
enable_irq_ready(r8a66597, pipenum);
if (!usb_pipeisoc(urb->pipe))
enable_irq_nrdy(r8a66597, pipenum);
}
static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
{
disable_irq_ready(r8a66597, pipenum);
disable_irq_nrdy(r8a66597, pipenum);
}
/* this function must be called with interrupt disabled */
static void r8a66597_usb_preconnect(struct r8a66597 *r8a66597, int port)
{
r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_CONNECTION)
| (1 << USB_PORT_FEAT_C_CONNECTION);
r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
}
/* this function must be called with interrupt disabled */
static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
{
u16 speed = get_rh_usb_speed(r8a66597, port);
struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
if (speed == HSMODE)
rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED);
else if (speed == LSMODE)
rh->port |= (1 << USB_PORT_FEAT_LOWSPEED);
rh->port &= ~(1 << USB_PORT_FEAT_RESET);
rh->port |= 1 << USB_PORT_FEAT_ENABLE;
}
/* this function must be called with interrupt disabled */
static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
{
struct r8a66597_device *dev = r8a66597->root_hub[port].dev;
r8a66597->root_hub[port].port &= ~(1 << USB_PORT_FEAT_CONNECTION);
r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_C_CONNECTION);
disable_r8a66597_pipe_all(r8a66597, dev);
free_usb_address(r8a66597, dev);
r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
}
/* this function must be called with interrupt disabled */
static void prepare_setup_packet(struct r8a66597 *r8a66597,
struct r8a66597_td *td)
{
int i;
u16 *p = (u16 *)td->urb->setup_packet;
unsigned long setup_addr = USBREQ;
r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
DCPMAXP);
r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
for (i = 0; i < 4; i++) {
r8a66597_write(r8a66597, cpu_to_le16(p[i]), setup_addr);
setup_addr += 2;
}
r8a66597_write(r8a66597, SUREQ, DCPCTR);
}
/* this function must be called with interrupt disabled */
static void prepare_packet_read(struct r8a66597 *r8a66597,
struct r8a66597_td *td)
{
struct urb *urb = td->urb;
if (usb_pipecontrol(urb->pipe)) {
r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
if (urb->actual_length == 0) {
r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
r8a66597_write(r8a66597, BCLR, CFIFOCTR);
}
pipe_irq_disable(r8a66597, td->pipenum);
pipe_start(r8a66597, td->pipe);
pipe_irq_enable(r8a66597, urb, td->pipenum);
} else {
if (urb->actual_length == 0) {
pipe_irq_disable(r8a66597, td->pipenum);
pipe_setting(r8a66597, td);
pipe_stop(r8a66597, td->pipe);
r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
if (td->pipe->pipetre) {
r8a66597_write(r8a66597, TRCLR,
td->pipe->pipetre);
r8a66597_write(r8a66597,
(urb->transfer_buffer_length
+ td->maxpacket - 1)
/ td->maxpacket,
td->pipe->pipetrn);
r8a66597_bset(r8a66597, TRENB,
td->pipe->pipetre);
}
pipe_start(r8a66597, td->pipe);
pipe_irq_enable(r8a66597, urb, td->pipenum);
}
}
}
/* this function must be called with interrupt disabled */
static void prepare_packet_write(struct r8a66597 *r8a66597,
struct r8a66597_td *td)
{
u16 tmp;
struct urb *urb = td->urb;
if (usb_pipecontrol(urb->pipe)) {
pipe_stop(r8a66597, td->pipe);
r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
if (urb->actual_length == 0) {
r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
r8a66597_write(r8a66597, BCLR, CFIFOCTR);
}
} else {
if (urb->actual_length == 0)
pipe_setting(r8a66597, td);
if (td->pipe->pipetre)
r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
}
r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
fifo_change_from_pipe(r8a66597, td->pipe);
tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
if (unlikely((tmp & FRDY) == 0))
pipe_irq_enable(r8a66597, urb, td->pipenum);
else
packet_write(r8a66597, td->pipenum);
pipe_start(r8a66597, td->pipe);
}
/* this function must be called with interrupt disabled */
static void prepare_status_packet(struct r8a66597 *r8a66597,
struct r8a66597_td *td)
{
struct urb *urb = td->urb;
r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
pipe_stop(r8a66597, td->pipe);
if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
r8a66597_write(r8a66597, BCLR, CFIFOCTR);
r8a66597_write(r8a66597, BVAL, CFIFOCTR);
enable_irq_empty(r8a66597, 0);
} else {
r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
r8a66597_write(r8a66597, BCLR, CFIFOCTR);
enable_irq_ready(r8a66597, 0);
}
enable_irq_nrdy(r8a66597, 0);
pipe_start(r8a66597, td->pipe);
}
static int is_set_address(unsigned char *setup_packet)
{
if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
setup_packet[1] == USB_REQ_SET_ADDRESS)
return 1;
else
return 0;
}
/* this function must be called with interrupt disabled */
static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
BUG_ON(!td);
switch (td->type) {
case USB_PID_SETUP:
if (is_set_address(td->urb->setup_packet)) {
td->set_address = 1;
td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
td->urb);
if (td->urb->setup_packet[2] == 0)
return -EPIPE;
}
prepare_setup_packet(r8a66597, td);
break;
case USB_PID_IN:
prepare_packet_read(r8a66597, td);
break;
case USB_PID_OUT:
prepare_packet_write(r8a66597, td);
break;
case USB_PID_ACK:
prepare_status_packet(r8a66597, td);
break;
default:
err("invalid type.");
break;
}
return 0;
}
static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
{
if (usb_pipeisoc(urb->pipe)) {
if (urb->number_of_packets == td->iso_cnt)
return 1;
}
/* control or bulk or interrupt */
if ((urb->transfer_buffer_length <= urb->actual_length) ||
(td->short_packet) || (td->zero_packet))
return 1;
return 0;
}
/* this function must be called with interrupt disabled */
static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
unsigned long time;
BUG_ON(!td);
if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
!usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
r8a66597->timeout_map |= 1 << td->pipenum;
switch (usb_pipetype(td->urb->pipe)) {
case PIPE_INTERRUPT:
case PIPE_ISOCHRONOUS:
time = 30;
break;
default:
time = 300;
break;
}
mod_timer(&r8a66597->td_timer[td->pipenum],
jiffies + msecs_to_jiffies(time));
}
}
/* this function must be called with interrupt disabled */
static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
u16 pipenum, struct urb *urb, int status)
__releases(r8a66597->lock) __acquires(r8a66597->lock)
{
int restart = 0;
struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
r8a66597->timeout_map &= ~(1 << pipenum);
if (likely(td)) {
if (td->set_address && (status != 0 || urb->unlinked))
r8a66597->address_map &= ~(1 << urb->setup_packet[2]);
pipe_toggle_save(r8a66597, td->pipe, urb);
list_del(&td->queue);
kfree(td);
}
if (!list_empty(&r8a66597->pipe_queue[pipenum]))
restart = 1;
if (likely(urb)) {
if (usb_pipeisoc(urb->pipe))
urb->start_frame = r8a66597_get_frame(hcd);
usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
spin_unlock(&r8a66597->lock);
usb_hcd_giveback_urb(hcd, urb, status);
spin_lock(&r8a66597->lock);
}
if (restart) {
td = r8a66597_get_td(r8a66597, pipenum);
if (unlikely(!td))
return;
start_transfer(r8a66597, td);
set_td_timer(r8a66597, td);
}
}
static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
{
u16 tmp;
int rcv_len, bufsize, urb_len, size;
u16 *buf;
struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
struct urb *urb;
int finish = 0;
int status = 0;
if (unlikely(!td))
return;
urb = td->urb;
fifo_change_from_pipe(r8a66597, td->pipe);
tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
if (unlikely((tmp & FRDY) == 0)) {
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
err("in fifo not ready (%d)", pipenum);
finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
return;
}
/* prepare parameters */
rcv_len = tmp & DTLN;
if (usb_pipeisoc(urb->pipe)) {
buf = (u16 *)(urb->transfer_buffer +
urb->iso_frame_desc[td->iso_cnt].offset);
urb_len = urb->iso_frame_desc[td->iso_cnt].length;
} else {
buf = (void *)urb->transfer_buffer + urb->actual_length;
urb_len = urb->transfer_buffer_length - urb->actual_length;
}
bufsize = min(urb_len, (int) td->maxpacket);
if (rcv_len <= bufsize) {
size = rcv_len;
} else {
size = bufsize;
status = -EOVERFLOW;
finish = 1;
}
/* update parameters */
urb->actual_length += size;
if (rcv_len == 0)
td->zero_packet = 1;
if (rcv_len < bufsize) {
td->short_packet = 1;
}
if (usb_pipeisoc(urb->pipe)) {
urb->iso_frame_desc[td->iso_cnt].actual_length = size;
urb->iso_frame_desc[td->iso_cnt].status = status;
td->iso_cnt++;
finish = 0;
}
/* check transfer finish */
if (finish || check_transfer_finish(td, urb)) {
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
finish = 1;
}
/* read fifo */
if (urb->transfer_buffer) {
if (size == 0)
r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
else
r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
buf, size);
}
if (finish && pipenum != 0)
finish_request(r8a66597, td, pipenum, urb, status);
}
static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
{
u16 tmp;
int bufsize, size;
u16 *buf;
struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
struct urb *urb;
if (unlikely(!td))
return;
urb = td->urb;
fifo_change_from_pipe(r8a66597, td->pipe);
tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
if (unlikely((tmp & FRDY) == 0)) {
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
err("out write fifo not ready. (%d)", pipenum);
finish_request(r8a66597, td, pipenum, urb, -EPIPE);
return;
}
/* prepare parameters */
bufsize = td->maxpacket;
if (usb_pipeisoc(urb->pipe)) {
buf = (u16 *)(urb->transfer_buffer +
urb->iso_frame_desc[td->iso_cnt].offset);
size = min(bufsize,
(int)urb->iso_frame_desc[td->iso_cnt].length);
} else {
buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
size = min((int)bufsize,
urb->transfer_buffer_length - urb->actual_length);
}
/* write fifo */
if (pipenum > 0)
r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
if (urb->transfer_buffer) {
r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
}
/* update parameters */
urb->actual_length += size;
if (usb_pipeisoc(urb->pipe)) {
urb->iso_frame_desc[td->iso_cnt].actual_length = size;
urb->iso_frame_desc[td->iso_cnt].status = 0;
td->iso_cnt++;
}
/* check transfer finish */
if (check_transfer_finish(td, urb)) {
disable_irq_ready(r8a66597, pipenum);
enable_irq_empty(r8a66597, pipenum);
if (!usb_pipeisoc(urb->pipe))
enable_irq_nrdy(r8a66597, pipenum);
} else
pipe_irq_enable(r8a66597, urb, pipenum);
}
static void check_next_phase(struct r8a66597 *r8a66597, int status)
{
struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
struct urb *urb;
u8 finish = 0;
if (unlikely(!td))
return;
urb = td->urb;
switch (td->type) {
case USB_PID_IN:
case USB_PID_OUT:
if (check_transfer_finish(td, urb))
td->type = USB_PID_ACK;
break;
case USB_PID_SETUP:
if (urb->transfer_buffer_length == urb->actual_length)
td->type = USB_PID_ACK;
else if (usb_pipeout(urb->pipe))
td->type = USB_PID_OUT;
else
td->type = USB_PID_IN;
break;
case USB_PID_ACK:
finish = 1;
break;
}
if (finish || status != 0 || urb->unlinked)
finish_request(r8a66597, td, 0, urb, status);
else
start_transfer(r8a66597, td);
}
static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
{
struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
if (td) {
u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;
if (pid == PID_NAK)
return -ECONNRESET;
else
return -EPIPE;
}
return 0;
}
static void irq_pipe_ready(struct r8a66597 *r8a66597)
{
u16 check;
u16 pipenum;
u16 mask;
struct r8a66597_td *td;
mask = r8a66597_read(r8a66597, BRDYSTS)
& r8a66597_read(r8a66597, BRDYENB);
r8a66597_write(r8a66597, ~mask, BRDYSTS);
if (mask & BRDY0) {
td = r8a66597_get_td(r8a66597, 0);
if (td && td->type == USB_PID_IN)
packet_read(r8a66597, 0);
else
pipe_irq_disable(r8a66597, 0);
check_next_phase(r8a66597, 0);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
check = 1 << pipenum;
if (mask & check) {
td = r8a66597_get_td(r8a66597, pipenum);
if (unlikely(!td))
continue;
if (td->type == USB_PID_IN)
packet_read(r8a66597, pipenum);
else if (td->type == USB_PID_OUT)
packet_write(r8a66597, pipenum);
}
}
}
static void irq_pipe_empty(struct r8a66597 *r8a66597)
{
u16 tmp;
u16 check;
u16 pipenum;
u16 mask;
struct r8a66597_td *td;
mask = r8a66597_read(r8a66597, BEMPSTS)
& r8a66597_read(r8a66597, BEMPENB);
r8a66597_write(r8a66597, ~mask, BEMPSTS);
if (mask & BEMP0) {
cfifo_change(r8a66597, 0);
td = r8a66597_get_td(r8a66597, 0);
if (td && td->type != USB_PID_OUT)
disable_irq_empty(r8a66597, 0);
check_next_phase(r8a66597, 0);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
check = 1 << pipenum;
if (mask & check) {
struct r8a66597_td *td;
td = r8a66597_get_td(r8a66597, pipenum);
if (unlikely(!td))
continue;
tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
if ((tmp & INBUFM) == 0) {
disable_irq_empty(r8a66597, pipenum);
pipe_irq_disable(r8a66597, pipenum);
finish_request(r8a66597, td, pipenum, td->urb,
0);
}
}
}
}
static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
{
u16 check;
u16 pipenum;
u16 mask;
int status;
mask = r8a66597_read(r8a66597, NRDYSTS)
& r8a66597_read(r8a66597, NRDYENB);
r8a66597_write(r8a66597, ~mask, NRDYSTS);
if (mask & NRDY0) {
cfifo_change(r8a66597, 0);
status = get_urb_error(r8a66597, 0);
pipe_irq_disable(r8a66597, 0);
check_next_phase(r8a66597, status);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
check = 1 << pipenum;
if (mask & check) {
struct r8a66597_td *td;
td = r8a66597_get_td(r8a66597, pipenum);
if (unlikely(!td))
continue;
status = get_urb_error(r8a66597, pipenum);
pipe_irq_disable(r8a66597, pipenum);
pipe_stop(r8a66597, td->pipe);
finish_request(r8a66597, td, pipenum, td->urb, status);
}
}
}
static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port)
{
struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
rh->scount = R8A66597_MAX_SAMPLING;
mod_timer(&r8a66597->rh_timer, jiffies + msecs_to_jiffies(50));
}
static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
u16 intsts0, intsts1, intsts2;
u16 intenb0, intenb1, intenb2;
u16 mask0, mask1, mask2;
int status;
spin_lock(&r8a66597->lock);
intsts0 = r8a66597_read(r8a66597, INTSTS0);
intsts1 = r8a66597_read(r8a66597, INTSTS1);
intsts2 = r8a66597_read(r8a66597, INTSTS2);
intenb0 = r8a66597_read(r8a66597, INTENB0);
intenb1 = r8a66597_read(r8a66597, INTENB1);
intenb2 = r8a66597_read(r8a66597, INTENB2);
mask2 = intsts2 & intenb2;
mask1 = intsts1 & intenb1;
mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
if (mask2) {
if (mask2 & ATTCH) {
r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
r8a66597_bclr(r8a66597, ATTCHE, INTENB2);
/* start usb bus sampling */
start_root_hub_sampling(r8a66597, 1);
}
if (mask2 & DTCH) {
r8a66597_write(r8a66597, ~DTCH, INTSTS2);
r8a66597_bclr(r8a66597, DTCHE, INTENB2);
r8a66597_usb_disconnect(r8a66597, 1);
}
}
if (mask1) {
if (mask1 & ATTCH) {
r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
r8a66597_bclr(r8a66597, ATTCHE, INTENB1);
/* start usb bus sampling */
start_root_hub_sampling(r8a66597, 0);
}
if (mask1 & DTCH) {
r8a66597_write(r8a66597, ~DTCH, INTSTS1);
r8a66597_bclr(r8a66597, DTCHE, INTENB1);
r8a66597_usb_disconnect(r8a66597, 0);
}
if (mask1 & SIGN) {
r8a66597_write(r8a66597, ~SIGN, INTSTS1);
status = get_urb_error(r8a66597, 0);
check_next_phase(r8a66597, status);
}
if (mask1 & SACK) {
r8a66597_write(r8a66597, ~SACK, INTSTS1);
check_next_phase(r8a66597, 0);
}
}
if (mask0) {
if (mask0 & BRDY)
irq_pipe_ready(r8a66597);
if (mask0 & BEMP)
irq_pipe_empty(r8a66597);
if (mask0 & NRDY)
irq_pipe_nrdy(r8a66597);
}
spin_unlock(&r8a66597->lock);
return IRQ_HANDLED;
}
/* this function must be called with interrupt disabled */
static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
{
u16 tmp;
struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
unsigned long dvstctr_reg = get_dvstctr_reg(port);
tmp = r8a66597_read(r8a66597, dvstctr_reg);
if ((tmp & USBRST) == USBRST) {
r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
dvstctr_reg);
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
} else
r8a66597_usb_connect(r8a66597, port);
}
if (rh->scount > 0) {
tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
if (tmp == rh->old_syssts) {
rh->scount--;
if (rh->scount == 0) {
if (tmp == FS_JSTS) {
r8a66597_bset(r8a66597, HSE,
get_syscfg_reg(port));
r8a66597_usb_preconnect(r8a66597, port);
} else if (tmp == LS_JSTS) {
r8a66597_bclr(r8a66597, HSE,
get_syscfg_reg(port));
r8a66597_usb_preconnect(r8a66597, port);
} else if (tmp == SE0)
r8a66597_bset(r8a66597, ATTCHE,
get_intenb_reg(port));
} else {
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
}
} else {
rh->scount = R8A66597_MAX_SAMPLING;
rh->old_syssts = tmp;
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
}
}
}
static void r8a66597_td_timer(unsigned long _r8a66597)
{
struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
unsigned long flags;
u16 pipenum;
struct r8a66597_td *td, *new_td = NULL;
struct r8a66597_pipe *pipe;
spin_lock_irqsave(&r8a66597->lock, flags);
for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
if (!(r8a66597->timeout_map & (1 << pipenum)))
continue;
if (timer_pending(&r8a66597->td_timer[pipenum]))
continue;
td = r8a66597_get_td(r8a66597, pipenum);
if (!td) {
r8a66597->timeout_map &= ~(1 << pipenum);
continue;
}
if (td->urb->actual_length) {
set_td_timer(r8a66597, td);
break;
}
pipe = td->pipe;
pipe_stop(r8a66597, pipe);
new_td = td;
do {
list_move_tail(&new_td->queue,
&r8a66597->pipe_queue[pipenum]);
new_td = r8a66597_get_td(r8a66597, pipenum);
if (!new_td) {
new_td = td;
break;
}
} while (td != new_td && td->address == new_td->address);
start_transfer(r8a66597, new_td);
if (td == new_td)
r8a66597->timeout_map &= ~(1 << pipenum);
else
set_td_timer(r8a66597, new_td);
break;
}
spin_unlock_irqrestore(&r8a66597->lock, flags);
}
static void r8a66597_timer(unsigned long _r8a66597)
{
struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
unsigned long flags;
spin_lock_irqsave(&r8a66597->lock, flags);
r8a66597_root_hub_control(r8a66597, 0);
r8a66597_root_hub_control(r8a66597, 1);
spin_unlock_irqrestore(&r8a66597->lock, flags);
}
static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
(urb->dev->state == USB_STATE_CONFIGURED))
return 1;
else
return 0;
}
static int r8a66597_start(struct usb_hcd *hcd)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
hcd->state = HC_STATE_RUNNING;
return enable_controller(r8a66597);
}
static void r8a66597_stop(struct usb_hcd *hcd)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
disable_controller(r8a66597);
}
static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
{
unsigned int usb_address = usb_pipedevice(urb->pipe);
u16 root_port, hub_port;
if (usb_address == 0) {
get_port_number(urb->dev->devpath,
&root_port, &hub_port);
set_devadd_reg(r8a66597, 0,
get_r8a66597_usb_speed(urb->dev->speed),
get_parent_r8a66597_address(r8a66597, urb->dev),
hub_port, root_port);
}
}
static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
struct urb *urb,
struct usb_host_endpoint *hep)
{
struct r8a66597_td *td;
u16 pipenum;
td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
if (td == NULL)
return NULL;
pipenum = r8a66597_get_pipenum(urb, hep);
td->pipenum = pipenum;
td->pipe = hep->hcpriv;
td->urb = urb;
td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
!usb_pipein(urb->pipe));
if (usb_pipecontrol(urb->pipe))
td->type = USB_PID_SETUP;
else if (usb_pipein(urb->pipe))
td->type = USB_PID_IN;
else
td->type = USB_PID_OUT;
INIT_LIST_HEAD(&td->queue);
return td;
}
static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
{
struct usb_host_endpoint *hep = urb->ep;
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
struct r8a66597_td *td = NULL;
int ret, request = 0;
unsigned long flags;
spin_lock_irqsave(&r8a66597->lock, flags);
if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
ret = -ENODEV;
goto error_not_linked;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret)
goto error_not_linked;
if (!hep->hcpriv) {
hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
GFP_ATOMIC);
if (!hep->hcpriv) {
ret = -ENOMEM;
goto error;
}
set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
if (usb_pipeendpoint(urb->pipe))
init_pipe_info(r8a66597, urb, hep, &hep->desc);
}
if (unlikely(check_pipe_config(r8a66597, urb)))
init_pipe_config(r8a66597, urb);
set_address_zero(r8a66597, urb);
td = r8a66597_make_td(r8a66597, urb, hep);
if (td == NULL) {
ret = -ENOMEM;
goto error;
}
if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
request = 1;
list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
urb->hcpriv = td;
if (request) {
ret = start_transfer(r8a66597, td);
if (ret < 0) {
list_del(&td->queue);
kfree(td);
}
} else
set_td_timer(r8a66597, td);
error:
if (ret)
usb_hcd_unlink_urb_from_ep(hcd, urb);
error_not_linked:
spin_unlock_irqrestore(&r8a66597->lock, flags);
return ret;
}
static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
int status)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
struct r8a66597_td *td;
unsigned long flags;
int rc;
spin_lock_irqsave(&r8a66597->lock, flags);
rc = usb_hcd_check_unlink_urb(hcd, urb, status);
if (rc)
goto done;
if (urb->hcpriv) {
td = urb->hcpriv;
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, td->pipenum);
disable_irq_empty(r8a66597, td->pipenum);
finish_request(r8a66597, td, td->pipenum, urb, status);
}
done:
spin_unlock_irqrestore(&r8a66597->lock, flags);
return rc;
}
static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *hep)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
struct r8a66597_td *td;
struct urb *urb = NULL;
u16 pipenum;
unsigned long flags;
if (pipe == NULL)
return;
pipenum = pipe->info.pipenum;
if (pipenum == 0) {
kfree(hep->hcpriv);
hep->hcpriv = NULL;
return;
}
spin_lock_irqsave(&r8a66597->lock, flags);
pipe_stop(r8a66597, pipe);
pipe_irq_disable(r8a66597, pipenum);
disable_irq_empty(r8a66597, pipenum);
td = r8a66597_get_td(r8a66597, pipenum);
if (td)
urb = td->urb;
finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
kfree(hep->hcpriv);
hep->hcpriv = NULL;
spin_unlock_irqrestore(&r8a66597->lock, flags);
}
static int r8a66597_get_frame(struct usb_hcd *hcd)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
}
static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
{
int chix;
if (udev->state == USB_STATE_CONFIGURED &&
udev->parent && udev->parent->devnum > 1 &&
udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
map[udev->devnum/32] |= (1 << (udev->devnum % 32));
for (chix = 0; chix < udev->maxchild; chix++) {
struct usb_device *childdev = udev->children[chix];
if (childdev)
collect_usb_address_map(childdev, map);
}
}
/* this function must be called with interrupt disabled */
static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
int addr)
{
struct r8a66597_device *dev;
struct list_head *list = &r8a66597->child_device;
list_for_each_entry(dev, list, device_list) {
if (!dev)
continue;
if (dev->usb_address != addr)
continue;
return dev;
}
err("get_r8a66597_device fail.(%d)\n", addr);
return NULL;
}
static void update_usb_address_map(struct r8a66597 *r8a66597,
struct usb_device *root_hub,
unsigned long *map)
{
int i, j, addr;
unsigned long diff;
unsigned long flags;
for (i = 0; i < 4; i++) {
diff = r8a66597->child_connect_map[i] ^ map[i];
if (!diff)
continue;
for (j = 0; j < 32; j++) {
if (!(diff & (1 << j)))
continue;
addr = i * 32 + j;
if (map[i] & (1 << j))
set_child_connect_map(r8a66597, addr);
else {
struct r8a66597_device *dev;
spin_lock_irqsave(&r8a66597->lock, flags);
dev = get_r8a66597_device(r8a66597, addr);
disable_r8a66597_pipe_all(r8a66597, dev);
free_usb_address(r8a66597, dev);
put_child_connect_map(r8a66597, addr);
spin_unlock_irqrestore(&r8a66597->lock, flags);
}
}
}
}
static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
struct usb_hcd *hcd)
{
struct usb_bus *bus;
unsigned long now_map[4];
memset(now_map, 0, sizeof(now_map));
list_for_each_entry(bus, &usb_bus_list, bus_list) {
if (!bus->root_hub)
continue;
if (bus->busnum != hcd->self.busnum)
continue;
collect_usb_address_map(bus->root_hub, now_map);
update_usb_address_map(r8a66597, bus->root_hub, now_map);
}
}
static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
unsigned long flags;
int i;
r8a66597_check_detect_child(r8a66597, hcd);
spin_lock_irqsave(&r8a66597->lock, flags);
*buf = 0; /* initialize (no change) */
for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
if (r8a66597->root_hub[i].port & 0xffff0000)
*buf |= 1 << (i + 1);
}
spin_unlock_irqrestore(&r8a66597->lock, flags);
return (*buf != 0);
}
static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
struct usb_hub_descriptor *desc)
{
desc->bDescriptorType = 0x29;
desc->bHubContrCurrent = 0;
desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
desc->bDescLength = 9;
desc->bPwrOn2PwrGood = 0;
desc->wHubCharacteristics = cpu_to_le16(0x0011);
desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
desc->bitmap[1] = ~0;
}
static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
int ret;
int port = (wIndex & 0x00FF) - 1;
struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
unsigned long flags;
ret = 0;
spin_lock_irqsave(&r8a66597->lock, flags);
switch (typeReq) {
case ClearHubFeature:
case SetHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (wIndex > R8A66597_MAX_ROOT_HUB)
goto error;
if (wLength != 0)
goto error;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
rh->port &= (1 << USB_PORT_FEAT_POWER);
break;
case USB_PORT_FEAT_SUSPEND:
break;
case USB_PORT_FEAT_POWER:
r8a66597_port_power(r8a66597, port, 0);
break;
case USB_PORT_FEAT_C_ENABLE:
case USB_PORT_FEAT_C_SUSPEND:
case USB_PORT_FEAT_C_CONNECTION:
case USB_PORT_FEAT_C_OVER_CURRENT:
case USB_PORT_FEAT_C_RESET:
break;
default:
goto error;
}
rh->port &= ~(1 << wValue);
break;
case GetHubDescriptor:
r8a66597_hub_descriptor(r8a66597,
(struct usb_hub_descriptor *)buf);
break;
case GetHubStatus:
*buf = 0x00;
break;
case GetPortStatus:
if (wIndex > R8A66597_MAX_ROOT_HUB)
goto error;
*(u32 *)buf = cpu_to_le32(rh->port);
break;
case SetPortFeature:
if (wIndex > R8A66597_MAX_ROOT_HUB)
goto error;
if (wLength != 0)
goto error;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
break;
case USB_PORT_FEAT_POWER:
r8a66597_port_power(r8a66597, port, 1);
rh->port |= (1 << USB_PORT_FEAT_POWER);
break;
case USB_PORT_FEAT_RESET: {
struct r8a66597_device *dev = rh->dev;
rh->port |= (1 << USB_PORT_FEAT_RESET);
disable_r8a66597_pipe_all(r8a66597, dev);
free_usb_address(r8a66597, dev);
r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
get_dvstctr_reg(port));
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
}
break;
default:
goto error;
}
rh->port |= 1 << wValue;
break;
default:
error:
ret = -EPIPE;
break;
}
spin_unlock_irqrestore(&r8a66597->lock, flags);
return ret;
}
static struct hc_driver r8a66597_hc_driver = {
.description = hcd_name,
.hcd_priv_size = sizeof(struct r8a66597),
.irq = r8a66597_irq,
/*
* generic hardware linkage
*/
.flags = HCD_USB2,
.start = r8a66597_start,
.stop = r8a66597_stop,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = r8a66597_urb_enqueue,
.urb_dequeue = r8a66597_urb_dequeue,
.endpoint_disable = r8a66597_endpoint_disable,
/*
* periodic schedule support
*/
.get_frame_number = r8a66597_get_frame,
/*
* root hub support
*/
.hub_status_data = r8a66597_hub_status_data,
.hub_control = r8a66597_hub_control,
};
#if defined(CONFIG_PM)
static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state)
{
pdev->dev.power.power_state = state;
return 0;
}
static int r8a66597_resume(struct platform_device *pdev)
{
pdev->dev.power.power_state = PMSG_ON;
return 0;
}
#else /* if defined(CONFIG_PM) */
#define r8a66597_suspend NULL
#define r8a66597_resume NULL
#endif
static int __init_or_module r8a66597_remove(struct platform_device *pdev)
{
struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
del_timer_sync(&r8a66597->rh_timer);
usb_remove_hcd(hcd);
iounmap((void *)r8a66597->reg);
usb_put_hcd(hcd);
return 0;
}
#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __init r8a66597_probe(struct platform_device *pdev)
{
struct resource *res = NULL;
int irq = -1;
void __iomem *reg = NULL;
struct usb_hcd *hcd = NULL;
struct r8a66597 *r8a66597;
int ret = 0;
int i;
if (pdev->dev.dma_mask) {
ret = -EINVAL;
err("dma not support");
goto clean_up;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
(char *)hcd_name);
if (!res) {
ret = -ENODEV;
err("platform_get_resource_byname error.");
goto clean_up;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = -ENODEV;
err("platform_get_irq error.");
goto clean_up;
}
reg = ioremap(res->start, resource_len(res));
if (reg == NULL) {
ret = -ENOMEM;
err("ioremap error.");
goto clean_up;
}
/* initialize hcd */
hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
if (!hcd) {
ret = -ENOMEM;
err("Failed to create hcd");
goto clean_up;
}
r8a66597 = hcd_to_r8a66597(hcd);
memset(r8a66597, 0, sizeof(struct r8a66597));
dev_set_drvdata(&pdev->dev, r8a66597);
spin_lock_init(&r8a66597->lock);
init_timer(&r8a66597->rh_timer);
r8a66597->rh_timer.function = r8a66597_timer;
r8a66597->rh_timer.data = (unsigned long)r8a66597;
r8a66597->reg = (unsigned long)reg;
for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
init_timer(&r8a66597->td_timer[i]);
r8a66597->td_timer[i].function = r8a66597_td_timer;
r8a66597->td_timer[i].data = (unsigned long)r8a66597;
}
INIT_LIST_HEAD(&r8a66597->child_device);
hcd->rsrc_start = res->start;
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (ret != 0) {
err("Failed to add hcd");
goto clean_up;
}
return 0;
clean_up:
if (reg)
iounmap(reg);
return ret;
}
static struct platform_driver r8a66597_driver = {
.probe = r8a66597_probe,
.remove = r8a66597_remove,
.suspend = r8a66597_suspend,
.resume = r8a66597_resume,
.driver = {
.name = (char *) hcd_name,
},
};
static int __init r8a66597_init(void)
{
if (usb_disabled())
return -ENODEV;
info("driver %s, %s", hcd_name, DRIVER_VERSION);
return platform_driver_register(&r8a66597_driver);
}
module_init(r8a66597_init);
static void __exit r8a66597_cleanup(void)
{
platform_driver_unregister(&r8a66597_driver);
}
module_exit(r8a66597_cleanup);
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