2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Driver for ST5481 USB ISDN modem
|
|
|
|
*
|
|
|
|
* Author Frode Isaksen
|
|
|
|
* Copyright 2001 by Frode Isaksen <fisaksen@bewan.com>
|
|
|
|
* 2001 by Kai Germaschewski <kai.germaschewski@gmx.de>
|
|
|
|
*
|
|
|
|
* This software may be used and distributed according to the terms
|
|
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/usb.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/netdevice.h>
|
2006-12-08 11:36:27 +01:00
|
|
|
#include <linux/bitrev.h>
|
2005-04-17 00:20:36 +02:00
|
|
|
#include "st5481.h"
|
|
|
|
|
|
|
|
static inline void B_L1L2(struct st5481_bcs *bcs, int pr, void *arg)
|
|
|
|
{
|
|
|
|
struct hisax_if *ifc = (struct hisax_if *) &bcs->b_if;
|
|
|
|
|
|
|
|
ifc->l1l2(ifc, pr, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Encode and transmit next frame.
|
|
|
|
*/
|
|
|
|
static void usb_b_out(struct st5481_bcs *bcs,int buf_nr)
|
|
|
|
{
|
|
|
|
struct st5481_b_out *b_out = &bcs->b_out;
|
|
|
|
struct st5481_adapter *adapter = bcs->adapter;
|
|
|
|
struct urb *urb;
|
|
|
|
unsigned int packet_size,offset;
|
|
|
|
int len,buf_size,bytes_sent;
|
|
|
|
int i;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
if (test_and_set_bit(buf_nr, &b_out->busy)) {
|
|
|
|
DBG(4,"ep %d urb %d busy",(bcs->channel+1)*2,buf_nr);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
urb = b_out->urb[buf_nr];
|
|
|
|
|
|
|
|
// Adjust isoc buffer size according to flow state
|
|
|
|
if(b_out->flow_event & (OUT_DOWN | OUT_UNDERRUN)) {
|
|
|
|
buf_size = NUM_ISO_PACKETS_B*SIZE_ISO_PACKETS_B_OUT + B_FLOW_ADJUST;
|
|
|
|
packet_size = SIZE_ISO_PACKETS_B_OUT + B_FLOW_ADJUST;
|
|
|
|
DBG(4,"B%d,adjust flow,add %d bytes",bcs->channel+1,B_FLOW_ADJUST);
|
|
|
|
} else if(b_out->flow_event & OUT_UP){
|
|
|
|
buf_size = NUM_ISO_PACKETS_B*SIZE_ISO_PACKETS_B_OUT - B_FLOW_ADJUST;
|
|
|
|
packet_size = SIZE_ISO_PACKETS_B_OUT - B_FLOW_ADJUST;
|
|
|
|
DBG(4,"B%d,adjust flow,remove %d bytes",bcs->channel+1,B_FLOW_ADJUST);
|
|
|
|
} else {
|
|
|
|
buf_size = NUM_ISO_PACKETS_B*SIZE_ISO_PACKETS_B_OUT;
|
|
|
|
packet_size = 8;
|
|
|
|
}
|
|
|
|
b_out->flow_event = 0;
|
|
|
|
|
|
|
|
len = 0;
|
|
|
|
while (len < buf_size) {
|
|
|
|
if ((skb = b_out->tx_skb)) {
|
|
|
|
DBG_SKB(0x100, skb);
|
|
|
|
DBG(4,"B%d,len=%d",bcs->channel+1,skb->len);
|
|
|
|
|
|
|
|
if (bcs->mode == L1_MODE_TRANS) {
|
|
|
|
bytes_sent = buf_size - len;
|
|
|
|
if (skb->len < bytes_sent)
|
|
|
|
bytes_sent = skb->len;
|
|
|
|
{ /* swap tx bytes to get hearable audio data */
|
|
|
|
register unsigned char *src = skb->data;
|
|
|
|
register unsigned char *dest = urb->transfer_buffer+len;
|
|
|
|
register unsigned int count;
|
|
|
|
for (count = 0; count < bytes_sent; count++)
|
2006-12-08 11:36:27 +01:00
|
|
|
*dest++ = bitrev8(*src++);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
len += bytes_sent;
|
|
|
|
} else {
|
|
|
|
len += isdnhdlc_encode(&b_out->hdlc_state,
|
|
|
|
skb->data, skb->len, &bytes_sent,
|
|
|
|
urb->transfer_buffer+len, buf_size-len);
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_pull(skb, bytes_sent);
|
|
|
|
|
|
|
|
if (!skb->len) {
|
|
|
|
// Frame sent
|
|
|
|
b_out->tx_skb = NULL;
|
2006-10-03 10:13:55 +02:00
|
|
|
B_L1L2(bcs, PH_DATA | CONFIRM, (void *)(unsigned long) skb->truesize);
|
2005-04-17 00:20:36 +02:00
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
|
|
|
|
/* if (!(bcs->tx_skb = skb_dequeue(&bcs->sq))) { */
|
|
|
|
/* st5481B_sched_event(bcs, B_XMTBUFREADY); */
|
|
|
|
/* } */
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (bcs->mode == L1_MODE_TRANS) {
|
|
|
|
memset(urb->transfer_buffer+len, 0xff, buf_size-len);
|
|
|
|
len = buf_size;
|
|
|
|
} else {
|
|
|
|
// Send flags
|
|
|
|
len += isdnhdlc_encode(&b_out->hdlc_state,
|
|
|
|
NULL, 0, &bytes_sent,
|
|
|
|
urb->transfer_buffer+len, buf_size-len);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Prepare the URB
|
|
|
|
for (i = 0, offset = 0; offset < len; i++) {
|
|
|
|
urb->iso_frame_desc[i].offset = offset;
|
|
|
|
urb->iso_frame_desc[i].length = packet_size;
|
|
|
|
offset += packet_size;
|
|
|
|
packet_size = SIZE_ISO_PACKETS_B_OUT;
|
|
|
|
}
|
|
|
|
urb->transfer_buffer_length = len;
|
|
|
|
urb->number_of_packets = i;
|
|
|
|
urb->dev = adapter->usb_dev;
|
|
|
|
|
|
|
|
DBG_ISO_PACKET(0x200,urb);
|
|
|
|
|
|
|
|
SUBMIT_URB(urb, GFP_NOIO);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start transfering (flags or data) on the B channel, since
|
|
|
|
* FIFO counters has been set to a non-zero value.
|
|
|
|
*/
|
|
|
|
static void st5481B_start_xfer(void *context)
|
|
|
|
{
|
|
|
|
struct st5481_bcs *bcs = context;
|
|
|
|
|
|
|
|
DBG(4,"B%d",bcs->channel+1);
|
|
|
|
|
|
|
|
// Start transmitting (flags or data) on B channel
|
|
|
|
|
|
|
|
usb_b_out(bcs,0);
|
|
|
|
usb_b_out(bcs,1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the adapter has only 2 LEDs, the green
|
|
|
|
* LED will blink with a rate depending
|
|
|
|
* on the number of channels opened.
|
|
|
|
*/
|
|
|
|
static void led_blink(struct st5481_adapter *adapter)
|
|
|
|
{
|
|
|
|
u_char leds = adapter->leds;
|
|
|
|
|
|
|
|
// 50 frames/sec for each channel
|
|
|
|
if (++adapter->led_counter % 50) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (adapter->led_counter % 100) {
|
|
|
|
leds |= GREEN_LED;
|
|
|
|
} else {
|
|
|
|
leds &= ~GREEN_LED;
|
|
|
|
}
|
|
|
|
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, leds, NULL, NULL);
|
|
|
|
}
|
|
|
|
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:55:46 +02:00
|
|
|
static void usb_b_out_complete(struct urb *urb)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct st5481_bcs *bcs = urb->context;
|
|
|
|
struct st5481_b_out *b_out = &bcs->b_out;
|
|
|
|
struct st5481_adapter *adapter = bcs->adapter;
|
|
|
|
int buf_nr;
|
|
|
|
|
|
|
|
buf_nr = get_buf_nr(b_out->urb, urb);
|
|
|
|
test_and_clear_bit(buf_nr, &b_out->busy);
|
|
|
|
|
|
|
|
if (unlikely(urb->status < 0)) {
|
2005-09-17 23:52:42 +02:00
|
|
|
switch (urb->status) {
|
|
|
|
case -ENOENT:
|
|
|
|
case -ESHUTDOWN:
|
|
|
|
case -ECONNRESET:
|
|
|
|
DBG(4,"urb killed status %d", urb->status);
|
|
|
|
return; // Give up
|
|
|
|
default:
|
2008-07-25 10:45:52 +02:00
|
|
|
WARNING("urb status %d",urb->status);
|
2005-09-17 23:52:42 +02:00
|
|
|
if (b_out->busy == 0) {
|
|
|
|
st5481_usb_pipe_reset(adapter, (bcs->channel+1)*2 | USB_DIR_OUT, NULL, NULL);
|
|
|
|
}
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
usb_b_out(bcs,buf_nr);
|
|
|
|
|
|
|
|
if (adapter->number_of_leds == 2)
|
|
|
|
led_blink(adapter);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start or stop the transfer on the B channel.
|
|
|
|
*/
|
|
|
|
static void st5481B_mode(struct st5481_bcs *bcs, int mode)
|
|
|
|
{
|
|
|
|
struct st5481_b_out *b_out = &bcs->b_out;
|
|
|
|
struct st5481_adapter *adapter = bcs->adapter;
|
|
|
|
|
|
|
|
DBG(4,"B%d,mode=%d", bcs->channel + 1, mode);
|
|
|
|
|
|
|
|
if (bcs->mode == mode)
|
|
|
|
return;
|
|
|
|
|
|
|
|
bcs->mode = mode;
|
|
|
|
|
|
|
|
// Cancel all USB transfers on this B channel
|
|
|
|
usb_unlink_urb(b_out->urb[0]);
|
|
|
|
usb_unlink_urb(b_out->urb[1]);
|
|
|
|
b_out->busy = 0;
|
|
|
|
|
|
|
|
st5481_in_mode(&bcs->b_in, mode);
|
|
|
|
if (bcs->mode != L1_MODE_NULL) {
|
|
|
|
// Open the B channel
|
|
|
|
if (bcs->mode != L1_MODE_TRANS) {
|
2009-07-08 20:31:42 +02:00
|
|
|
u32 features = HDLC_BITREVERSE;
|
|
|
|
if (bcs->mode == L1_MODE_HDLC_56K)
|
|
|
|
features |= HDLC_56KBIT;
|
|
|
|
isdnhdlc_out_init(&b_out->hdlc_state, features);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
st5481_usb_pipe_reset(adapter, (bcs->channel+1)*2, NULL, NULL);
|
|
|
|
|
|
|
|
// Enable B channel interrupts
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, FFMSK_B1+(bcs->channel*2),
|
|
|
|
OUT_UP+OUT_DOWN+OUT_UNDERRUN, NULL, NULL);
|
|
|
|
|
|
|
|
// Enable B channel FIFOs
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, OUT_B1_COUNTER+(bcs->channel*2), 32, st5481B_start_xfer, bcs);
|
|
|
|
if (adapter->number_of_leds == 4) {
|
|
|
|
if (bcs->channel == 0) {
|
|
|
|
adapter->leds |= B1_LED;
|
|
|
|
} else {
|
|
|
|
adapter->leds |= B2_LED;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// Disble B channel interrupts
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, FFMSK_B1+(bcs->channel*2), 0, NULL, NULL);
|
|
|
|
|
|
|
|
// Disable B channel FIFOs
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, OUT_B1_COUNTER+(bcs->channel*2), 0, NULL, NULL);
|
|
|
|
|
|
|
|
if (adapter->number_of_leds == 4) {
|
|
|
|
if (bcs->channel == 0) {
|
|
|
|
adapter->leds &= ~B1_LED;
|
|
|
|
} else {
|
|
|
|
adapter->leds &= ~B2_LED;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
|
|
|
|
}
|
|
|
|
if (b_out->tx_skb) {
|
|
|
|
dev_kfree_skb_any(b_out->tx_skb);
|
|
|
|
b_out->tx_skb = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int st5481_setup_b_out(struct st5481_bcs *bcs)
|
|
|
|
{
|
|
|
|
struct usb_device *dev = bcs->adapter->usb_dev;
|
|
|
|
struct usb_interface *intf;
|
|
|
|
struct usb_host_interface *altsetting = NULL;
|
|
|
|
struct usb_host_endpoint *endpoint;
|
|
|
|
struct st5481_b_out *b_out = &bcs->b_out;
|
|
|
|
|
|
|
|
DBG(4,"");
|
|
|
|
|
|
|
|
intf = usb_ifnum_to_if(dev, 0);
|
|
|
|
if (intf)
|
|
|
|
altsetting = usb_altnum_to_altsetting(intf, 3);
|
|
|
|
if (!altsetting)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
// Allocate URBs and buffers for the B channel out
|
|
|
|
endpoint = &altsetting->endpoint[EP_B1_OUT - 1 + bcs->channel * 2];
|
|
|
|
|
|
|
|
DBG(4,"endpoint address=%02x,packet size=%d",
|
|
|
|
endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
|
|
|
|
|
|
|
|
// Allocate memory for 8000bytes/sec + extra bytes if underrun
|
|
|
|
return st5481_setup_isocpipes(b_out->urb, dev,
|
|
|
|
usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
|
|
|
|
NUM_ISO_PACKETS_B, SIZE_ISO_PACKETS_B_OUT,
|
|
|
|
NUM_ISO_PACKETS_B * SIZE_ISO_PACKETS_B_OUT + B_FLOW_ADJUST,
|
|
|
|
usb_b_out_complete, bcs);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void st5481_release_b_out(struct st5481_bcs *bcs)
|
|
|
|
{
|
|
|
|
struct st5481_b_out *b_out = &bcs->b_out;
|
|
|
|
|
|
|
|
DBG(4,"");
|
|
|
|
|
|
|
|
st5481_release_isocpipes(b_out->urb);
|
|
|
|
}
|
|
|
|
|
|
|
|
int st5481_setup_b(struct st5481_bcs *bcs)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
DBG(4,"");
|
|
|
|
|
|
|
|
retval = st5481_setup_b_out(bcs);
|
|
|
|
if (retval)
|
|
|
|
goto err;
|
|
|
|
bcs->b_in.bufsize = HSCX_BUFMAX;
|
|
|
|
bcs->b_in.num_packets = NUM_ISO_PACKETS_B;
|
|
|
|
bcs->b_in.packet_size = SIZE_ISO_PACKETS_B_IN;
|
|
|
|
bcs->b_in.ep = (bcs->channel ? EP_B2_IN : EP_B1_IN) | USB_DIR_IN;
|
|
|
|
bcs->b_in.counter = bcs->channel ? IN_B2_COUNTER : IN_B1_COUNTER;
|
|
|
|
bcs->b_in.adapter = bcs->adapter;
|
|
|
|
bcs->b_in.hisax_if = &bcs->b_if.ifc;
|
|
|
|
retval = st5481_setup_in(&bcs->b_in);
|
|
|
|
if (retval)
|
|
|
|
goto err_b_out;
|
|
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_b_out:
|
|
|
|
st5481_release_b_out(bcs);
|
|
|
|
err:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Release buffers and URBs for the B channels
|
|
|
|
*/
|
|
|
|
void st5481_release_b(struct st5481_bcs *bcs)
|
|
|
|
{
|
|
|
|
DBG(4,"");
|
|
|
|
|
|
|
|
st5481_release_in(&bcs->b_in);
|
|
|
|
st5481_release_b_out(bcs);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* st5481_b_l2l1 is the entry point for upper layer routines that want to
|
|
|
|
* transmit on the B channel. PH_DATA | REQUEST is a normal packet that
|
|
|
|
* we either start transmitting (if idle) or queue (if busy).
|
|
|
|
* PH_PULL | REQUEST can be called to request a callback message
|
|
|
|
* (PH_PULL | CONFIRM)
|
|
|
|
* once the link is idle. After a "pull" callback, the upper layer
|
|
|
|
* routines can use PH_PULL | INDICATION to send data.
|
|
|
|
*/
|
|
|
|
void st5481_b_l2l1(struct hisax_if *ifc, int pr, void *arg)
|
|
|
|
{
|
|
|
|
struct st5481_bcs *bcs = ifc->priv;
|
|
|
|
struct sk_buff *skb = arg;
|
2006-10-03 10:13:55 +02:00
|
|
|
long mode;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
DBG(4, "");
|
|
|
|
|
|
|
|
switch (pr) {
|
|
|
|
case PH_DATA | REQUEST:
|
2006-03-26 18:19:26 +02:00
|
|
|
BUG_ON(bcs->b_out.tx_skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
bcs->b_out.tx_skb = skb;
|
|
|
|
break;
|
|
|
|
case PH_ACTIVATE | REQUEST:
|
2006-10-03 10:13:55 +02:00
|
|
|
mode = (long) arg;
|
|
|
|
DBG(4,"B%d,PH_ACTIVATE_REQUEST %ld", bcs->channel + 1, mode);
|
2005-04-17 00:20:36 +02:00
|
|
|
st5481B_mode(bcs, mode);
|
|
|
|
B_L1L2(bcs, PH_ACTIVATE | INDICATION, NULL);
|
|
|
|
break;
|
|
|
|
case PH_DEACTIVATE | REQUEST:
|
|
|
|
DBG(4,"B%d,PH_DEACTIVATE_REQUEST", bcs->channel + 1);
|
|
|
|
st5481B_mode(bcs, L1_MODE_NULL);
|
|
|
|
B_L1L2(bcs, PH_DEACTIVATE | INDICATION, NULL);
|
|
|
|
break;
|
|
|
|
default:
|
2008-07-25 10:45:52 +02:00
|
|
|
WARNING("pr %#x\n", pr);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|