- 根目录:
- drivers
- usb
- c67x00
- c67x00-hcd.c
/*
* c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
*
* Copyright (C) 2006-2008 Barco N.V.
* Derived from the Cypress cy7c67200/300 ezusb linux driver and
* based on multiple host controller drivers inside the linux kernel.
*
* 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.
*
* 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 Street, Fifth Floor, Boston,
* MA 02110-1301 USA.
*/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include "c67x00.h"
#include "c67x00-hcd.h"
/* --------------------------------------------------------------------------
* Root Hub Support
*/
static __u8 c67x00_hub_des[] = {
0x09, /* __u8 bLength; */
0x29, /* __u8 bDescriptorType; Hub-descriptor */
0x02, /* __u8 bNbrPorts; */
0x00, /* __u16 wHubCharacteristics; */
0x00, /* (per-port OC, no power switching) */
0x32, /* __u8 bPwrOn2pwrGood; 2ms */
0x00, /* __u8 bHubContrCurrent; 0 mA */
0x00, /* __u8 DeviceRemovable; ** 7 Ports max ** */
0xff, /* __u8 PortPwrCtrlMask; ** 7 ports max ** */
};
static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
{
struct c67x00_hcd *c67x00 = sie->private_data;
unsigned long flags;
c67x00_ll_husb_reset(sie, port);
spin_lock_irqsave(&c67x00->lock, flags);
c67x00_ll_husb_reset_port(sie, port);
spin_unlock_irqrestore(&c67x00->lock, flags);
c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
}
static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
struct c67x00_sie *sie = c67x00->sie;
u16 status;
int i;
*buf = 0;
status = c67x00_ll_usb_get_status(sie);
for (i = 0; i < C67X00_PORTS; i++)
if (status & PORT_CONNECT_CHANGE(i))
*buf |= (1 << i);
/* bit 0 denotes hub change, b1..n port change */
*buf <<= 1;
return !!*buf;
}
static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
struct c67x00_sie *sie = c67x00->sie;
u16 status, usb_status;
int len = 0;
unsigned int port = wIndex-1;
u16 wPortChange, wPortStatus;
switch (typeReq) {
case GetHubStatus:
*(__le32 *) buf = cpu_to_le32(0);
len = 4; /* hub power */
break;
case GetPortStatus:
if (wIndex > C67X00_PORTS)
return -EPIPE;
status = c67x00_ll_usb_get_status(sie);
usb_status = c67x00_ll_get_usb_ctl(sie);
wPortChange = 0;
if (status & PORT_CONNECT_CHANGE(port))
wPortChange |= USB_PORT_STAT_C_CONNECTION;
wPortStatus = USB_PORT_STAT_POWER;
if (!(status & PORT_SE0_STATUS(port)))
wPortStatus |= USB_PORT_STAT_CONNECTION;
if (usb_status & LOW_SPEED_PORT(port)) {
wPortStatus |= USB_PORT_STAT_LOW_SPEED;
c67x00->low_speed_ports |= (1 << port);
} else
c67x00->low_speed_ports &= ~(1 << port);
if (usb_status & SOF_EOP_EN(port))
wPortStatus |= USB_PORT_STAT_ENABLE;
*(__le16 *) buf = cpu_to_le16(wPortStatus);
*(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
len = 4;
break;
case SetHubFeature: /* We don't implement these */
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
len = 0;
break;
default:
return -EPIPE;
}
break;
case SetPortFeature:
if (wIndex > C67X00_PORTS)
return -EPIPE;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
dev_dbg(c67x00_hcd_dev(c67x00),
"SetPortFeature %d (SUSPEND)\n", port);
len = 0;
break;
case USB_PORT_FEAT_RESET:
c67x00_hub_reset_host_port(sie, port);
len = 0;
break;
case USB_PORT_FEAT_POWER:
/* Power always enabled */
len = 0;
break;
default:
dev_dbg(c67x00_hcd_dev(c67x00),
"%s: SetPortFeature %d (0x%04x) Error!\n",
__func__, port, wValue);
return -EPIPE;
}
break;
case ClearPortFeature:
if (wIndex > C67X00_PORTS)
return -EPIPE;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
/* Reset the port so that the c67x00 also notices the
* disconnect */
c67x00_hub_reset_host_port(sie, port);
len = 0;
break;
case USB_PORT_FEAT_C_ENABLE:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): C_ENABLE\n", port);
len = 0;
break;
case USB_PORT_FEAT_SUSPEND:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): SUSPEND\n", port);
len = 0;
break;
case USB_PORT_FEAT_C_SUSPEND:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): C_SUSPEND\n", port);
len = 0;
break;
case USB_PORT_FEAT_POWER:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): POWER\n", port);
return -EPIPE;
case USB_PORT_FEAT_C_CONNECTION:
c67x00_ll_usb_clear_status(sie,
PORT_CONNECT_CHANGE(port));
len = 0;
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): OVER_CURRENT\n", port);
len = 0;
break;
case USB_PORT_FEAT_C_RESET:
dev_dbg(c67x00_hcd_dev(c67x00),
"ClearPortFeature (%d): C_RESET\n", port);
len = 0;
break;
default:
dev_dbg(c67x00_hcd_dev(c67x00),
"%s: ClearPortFeature %d (0x%04x) Error!\n",
__func__, port, wValue);
return -EPIPE;
}
break;
case GetHubDescriptor:
len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
memcpy(buf, c67x00_hub_des, len);
break;
default:
dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
return -EPIPE;
}
return 0;
}
/* ---------------------------------------------------------------------
* Main part of host controller driver
*/
/**
* c67x00_hcd_irq
*
* This function is called from the interrupt handler in c67x00-drv.c
*/
static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
{
struct c67x00_hcd *c67x00 = sie->private_data;
struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
/* Handle sie message flags */
if (msg) {
if (msg & HUSB_TDListDone)
c67x00_sched_kick(c67x00);
else
dev_warn(c67x00_hcd_dev(c67x00),
"Unknown SIE msg flag(s): 0x%04x\n", msg);
}
if (unlikely(hcd->state == HC_STATE_HALT))
return;
if (!HCD_HW_ACCESSIBLE(hcd))
return;
/* Handle Start of frame events */
if (int_status & SOFEOP_FLG(sie->sie_num)) {
c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
c67x00_sched_kick(c67x00);
set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
}
}
/**
* c67x00_hcd_start: Host controller start hook
*/
static int c67x00_hcd_start(struct usb_hcd *hcd)
{
hcd->uses_new_polling = 1;
hcd->state = HC_STATE_RUNNING;
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
return 0;
}
/**
* c67x00_hcd_stop: Host controller stop hook
*/
static void c67x00_hcd_stop(struct usb_hcd *hcd)
{
/* Nothing to do */
}
static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
{
struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
u16 temp_val;
dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
temp_val &= HOST_FRAME_MASK;
return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
}
static struct hc_driver c67x00_hc_driver = {
.description = "c67x00-hcd",
.product_desc = "Cypress C67X00 Host Controller",
.hcd_priv_size = sizeof(struct c67x00_hcd),
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = c67x00_hcd_start,
.stop = c67x00_hcd_stop,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = c67x00_urb_enqueue,
.urb_dequeue = c67x00_urb_dequeue,
.endpoint_disable = c67x00_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = c67x00_hcd_get_frame,
/*
* root hub support
*/
.hub_status_data = c67x00_hub_status_data,
.hub_control = c67x00_hub_control,
};
/* ---------------------------------------------------------------------
* Setup/Teardown routines
*/
int c67x00_hcd_probe(struct c67x00_sie *sie)
{
struct c67x00_hcd *c67x00;
struct usb_hcd *hcd;
unsigned long flags;
int retval;
if (usb_disabled())
return -ENODEV;
hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
if (!hcd) {
retval = -ENOMEM;
goto err0;
}
c67x00 = hcd_to_c67x00_hcd(hcd);
spin_lock_init(&c67x00->lock);
c67x00->sie = sie;
INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
c67x00->urb_count = 0;
INIT_LIST_HEAD(&c67x00->td_list);
c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
c67x00->max_frame_bw = MAX_FRAME_BW_STD;
c67x00_ll_husb_init_host_port(sie);
init_completion(&c67x00->endpoint_disable);
retval = c67x00_sched_start_scheduler(c67x00);
if (retval)
goto err1;
retval = usb_add_hcd(hcd, 0, 0);
if (retval) {
dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
__func__, retval);
goto err2;
}
spin_lock_irqsave(&sie->lock, flags);
sie->private_data = c67x00;
sie->irq = c67x00_hcd_irq;
spin_unlock_irqrestore(&sie->lock, flags);
return retval;
err2:
c67x00_sched_stop_scheduler(c67x00);
err1:
usb_put_hcd(hcd);
err0:
return retval;
}
/* may be called with controller, bus, and devices active */
void c67x00_hcd_remove(struct c67x00_sie *sie)
{
struct c67x00_hcd *c67x00 = sie->private_data;
struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
c67x00_sched_stop_scheduler(c67x00);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
}