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/*
* HCD (OHCI) Virtual Root Hub for USB.
*
* (C) Copyright 1999 Roman Weissgaerber (weissg@vienna.at)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* The Root Hub is build into the HC (UHCI or OHCI) hardware.
* This piece of code lets it look like it resides on the usb
* like the other hubs.
* (for anyone who wants to do a control operation on the root hub)
*
* v4.0 1999/08/18
* v2.1 1999/05/09
* v2.0 1999/05/04
* v1.0 1999/04/27
* ohci-root-hub.c
*
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/string.h>
#include "usb.h"
#include "ohci-hcd.h"
#ifdef VROOTHUB
#include "ohci-root-hub.h"
static __u8 root_hub_dev_des[] =
{
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x00, /* __u16 bcdUSB; v1.0 */
0x01,
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; */
0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
0x00, /* __u16 idVendor; */
0x00,
0x00, /* __u16 idProduct; */
0x00,
0x00, /* __u16 bcdDevice; */
0x00,
0x00, /* __u8 iManufacturer; */
0x00, /* __u8 iProduct; */
0x00, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
};
/* Configuration descriptor */
static __u8 root_hub_config_des[] =
{
0x09, /* __u8 bLength; */
0x02, /* __u8 bDescriptorType; Configuration */
0x19, /* __u16 wTotalLength; */
0x00,
0x01, /* __u8 bNumInterfaces; */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0x40, /* __u8 bmAttributes;
Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
0x00, /* __u8 MaxPower; */
/* interface */
0x09, /* __u8 if_bLength; */
0x04, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; */
0x00, /* __u8 if_iInterface; */
/* endpoint */
0x07, /* __u8 ep_bLength; */
0x05, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
0x08, /* __u16 ep_wMaxPacketSize; 8 Bytes */
0x00,
0xff /* __u8 ep_bInterval; 255 ms */
};
/*
For OHCI we need just the 2nd Byte, so we
don't need this constant byte-array
static __u8 root_hub_hub_des[] =
{
0x00, * __u8 bLength; *
0x29, * __u8 bDescriptorType; Hub-descriptor *
0x02, * __u8 bNbrPorts; *
0x00, * __u16 wHubCharacteristics; *
0x00,
0x01, * __u8 bPwrOn2pwrGood; 2ms *
0x00, * __u8 bHubContrCurrent; 0 mA *
0x00, * __u8 DeviceRemovable; *** 8 Ports max *** *
0xff * __u8 PortPwrCtrlMask; *** 8 ports max *** *
};
*/
#define OK(x) len = (x); req_reply = 0; break
#define WR_RH_STAT(x) writel((x), &ohci->regs->roothub.status)
#define WR_RH_PORTSTAT(x) writel((x), &ohci->regs->roothub.portstatus[wIndex-1])
#define RD_RH_STAT readl(&ohci->regs->roothub.status)
#define RD_RH_PORTSTAT readl(&ohci->regs->roothub.portstatus[wIndex-1])
int root_hub_control_msg(struct usb_device *usb_dev, unsigned int pipe, devrequest * cmd, void *data, int leni)
{
struct ohci * ohci = usb_dev->bus->hcpriv;
__u8 data_buf[16];
int req_reply=4;
int len =leni;
__u16 bmRType_bReq = cmd->requesttype | (cmd->request << 8);
__u16 wValue = cpu_to_le16(cmd->value);
__u16 wIndex = cpu_to_le16(cmd->index);
__u16 wLength = cpu_to_le16(cmd->length);
OHCI_DEBUG(printk("USB root hub: adr: %2x cmd(%1x): ", ohci->rh.devnum, 8);)
OHCI_DEBUG({ int i; for(i=0;i<8;i++) printk(" %02x", ((unsigned char *)cmd)[i]);})
OHCI_DEBUG(printk(" ; \n");)
switch (bmRType_bReq) {
/* Request Destination:
without flags: Device,
RH_INTERFACE: interface,
RH_ENDPOINT: endpoint,
RH_CLASS means HUB here,
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
case RH_GET_STATUS: *(__u16 *)data = cpu_to_le16(1); OK(2);
case RH_GET_STATUS | RH_INTERFACE: *(__u16 *)data = cpu_to_le16(0); OK(2);
case RH_GET_STATUS | RH_ENDPOINT: *(__u16 *)data = cpu_to_le16(0); OK(2);
case RH_GET_STATUS | RH_CLASS: *(__u32 *)data = cpu_to_le32(RD_RH_STAT & 0x7fff7fff); OK(4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS: *(__u32 *)data = cpu_to_le32(RD_RH_PORTSTAT); OK(4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {
case (RH_ENDPOINT_STALL): OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
switch (wValue) {
case (RH_C_HUB_OVER_CURRENT): WR_RH_STAT(RH_PS_OCIC); OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE): WR_RH_PORTSTAT(RH_PS_CCS ); OK(0);
case (RH_PORT_SUSPEND): WR_RH_PORTSTAT(RH_PS_POCI); OK(0);
case (RH_PORT_POWER): WR_RH_PORTSTAT(RH_PS_LSDA); OK(0);
case (RH_C_PORT_CONNECTION): WR_RH_PORTSTAT(RH_PS_CSC ); OK(0);
case (RH_C_PORT_ENABLE): WR_RH_PORTSTAT(RH_PS_PESC); OK(0);
case (RH_C_PORT_SUSPEND): WR_RH_PORTSTAT(RH_PS_PSSC); OK(0);
case (RH_C_PORT_OVER_CURRENT): WR_RH_PORTSTAT(RH_PS_OCIC); OK(0);
case (RH_C_PORT_RESET): WR_RH_PORTSTAT(RH_PS_PRSC); OK(0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND): WR_RH_PORTSTAT(RH_PS_PSS ); OK(0);
case (RH_PORT_RESET): if((RD_RH_PORTSTAT &1) != 0) WR_RH_PORTSTAT(RH_PS_PRS ); /* BUG IN HUP CODE *********/ OK(0);
case (RH_PORT_POWER): WR_RH_PORTSTAT(RH_PS_PPS ); OK(0);
case (RH_PORT_ENABLE): WR_RH_PORTSTAT(RH_PS_PES ); OK(0);
}
break;
case RH_SET_ADDRESS: ohci->rh.devnum = wValue; OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case (0x01): /* device descriptor */
len = min(leni, min(sizeof(root_hub_dev_des), wLength));
memcpy(data, root_hub_dev_des, len); OK(len);
case (0x02): /* configuration descriptor */
len = min(leni, min(sizeof(root_hub_config_des), wLength));
memcpy(data, root_hub_config_des, len); OK(len);
case (0x03): /* string descriptors */
default:
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
*(__u8 *)(data_buf+1) = 0x29;
*(__u32 *)(data_buf+2) = cpu_to_le32(readl(&ohci->regs->roothub.a));
*(__u8 *)data_buf = (*(__u8 *)(data_buf+2) / 8) * 2 + 9; /* length of descriptor */
len = min(leni, min(*(__u8 *)data_buf, wLength));
*(__u8 *)(data_buf+6) = 0; /* Root Hub needs no current from bus */
if(*(__u8 *)(data_buf+2) < 8) { /* less than 8 Ports */
*(__u8 *) (data_buf+7) = readl(&ohci->regs->roothub.b) & 0xff;
*(__u8 *) (data_buf+8) = (readl(&ohci->regs->roothub.b) & 0xff0000) >> 16;
}
else {
*(__u32 *) (data_buf+7) = cpu_to_le32(readl(&ohci->regs->roothub.b));
}
memcpy(data, data_buf, len);
OK(len);
case RH_GET_CONFIGURATION: *(__u8 *)data = 0x01; OK(1);
case RH_SET_CONFIGURATION: WR_RH_STAT( 0x10000); OK(0);
}
OHCI_DEBUG(printk("USB HC roothubstat1: %x \n", readl( &(ohci->regs->roothub.portstatus[0]) ));)
OHCI_DEBUG(printk("USB HC roothubstat2: %x \n", readl( &(ohci->regs->roothub.portstatus[1]) ));)
return req_reply;
}
/* prepare Interrupt pipe transaction data; HUB INTERRUPT ENDPOINT */
static int root_hub_send_irq(struct ohci * ohci, void * rh_data, int rh_len ) {
int num_ports;
int i;
int ret;
int len;
__u8 * data = rh_data;
num_ports = readl(&ohci->regs->roothub.a) & 0xff;
*(__u8 *)data = (readl(&ohci->regs->roothub.status) & 0x00030000)>0?1:0;
ret = *(__u8 *)data;
for(i=0; i < num_ports; i++) {
*(__u8 *)(data+i/8) |= ((readl(&ohci->regs->roothub.portstatus[i]) & 0x001f0000)>0?1:0) << ((i+1) % 8);
ret += *(__u8 *)(data+i/8);
}
len = i/8 + 1;
if (ret > 0) return len;
return RH_NACK;
}
static int ohci_init_rh_int_timer(struct usb_device * usb_dev, int interval);
/* Virtual Root Hub INTs are polled by this timer every "intervall" ms */
static void rh_int_timer_do(unsigned long ptr) {
int len;
int interval;
int ret;
struct usb_device * usb_dev = (struct usb_device *) ptr;
struct ohci * ohci = usb_dev->bus->hcpriv;
struct ohci_device * dev = usb_to_ohci(usb_dev);
if(ohci->rh.send) {
len = root_hub_send_irq(ohci, dev->data, 1 );
if(len > 0) {
ret = ohci->rh.handler(0, dev->data, len, ohci->rh.dev_id);
if(ret <= 0)ohci->rh.send = 0; /* 0 .. do not requeue */
}
}
interval = ohci->rh.interval;
ohci_init_rh_int_timer(usb_dev, interval);
}
/* Root Hub INTs are polled by this timer */
static int ohci_init_rh_int_timer(struct usb_device * usb_dev, int interval) {
struct ohci * ohci = usb_dev->bus->hcpriv;
ohci->rh.interval = interval;
init_timer(& ohci->rh.rh_int_timer);
ohci->rh.rh_int_timer.function = rh_int_timer_do;
ohci->rh.rh_int_timer.data = (unsigned long) usb_dev;
ohci->rh.rh_int_timer.expires = jiffies + (HZ * (interval<30?30: interval)) /1000;
add_timer(&ohci->rh.rh_int_timer);
return 0;
}
static int ohci_del_rh_int_timer(struct ohci * ohci) {
del_timer(&ohci->rh.rh_int_timer);
return 0;
}
int root_hub_request_irq(struct usb_device *usb_dev, unsigned int pipe, usb_device_irq handler, int period, void *dev_id, void **handle)
{
struct ohci * ohci = usb_dev->bus->hcpriv;
OHCI_DEBUG( printk("USB HC-RH IRQ>>>: RH every %d ms\n", period);)
ohci->rh.handler = handler;
ohci->rh.dev_id = dev_id;
ohci->rh.send = 1;
ohci->rh.interval = period;
ohci_init_rh_int_timer(usb_dev, period);
*handle = ohci->rh.int_addr = usb_to_ohci(usb_dev);
return 0;
}
int root_hub_release_irq(struct usb_device *usb_dev, void * ed)
{
// struct usb_device *usb_dev = ((struct ohci_device *) ((unsigned int)ed & 0xfffff000))->usb;
struct ohci * ohci = usb_dev->bus->hcpriv;
OHCI_DEBUG( printk("USB HC-RH RM_IRQ>>>:\n");)
ohci->rh.send = 0;
ohci_del_rh_int_timer(ohci);
return 0;
}
#endif
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