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kernel-ark/drivers/isdn/hisax/st5481_d.c
David Howells 7d12e780e0 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 15:10:12 +01:00

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/*
* 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>
#include "st5481.h"
static void ph_connect(struct st5481_adapter *adapter);
static void ph_disconnect(struct st5481_adapter *adapter);
static struct Fsm l1fsm;
static char *strL1State[] =
{
"ST_L1_F3",
"ST_L1_F4",
"ST_L1_F6",
"ST_L1_F7",
"ST_L1_F8",
};
static char *strL1Event[] =
{
"EV_IND_DP",
"EV_IND_1",
"EV_IND_2",
"EV_IND_3",
"EV_IND_RSY",
"EV_IND_5",
"EV_IND_6",
"EV_IND_7",
"EV_IND_AP",
"EV_IND_9",
"EV_IND_10",
"EV_IND_11",
"EV_IND_AI8",
"EV_IND_AI10",
"EV_IND_AIL",
"EV_IND_DI",
"EV_PH_ACTIVATE_REQ",
"EV_PH_DEACTIVATE_REQ",
"EV_TIMER3",
};
static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg)
{
struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if;
ifc->l1l2(ifc, pr, arg);
}
static void
l1_go_f3(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
if (fi->state == ST_L1_F7)
ph_disconnect(adapter);
FsmChangeState(fi, ST_L1_F3);
D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
}
static void
l1_go_f6(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
if (fi->state == ST_L1_F7)
ph_disconnect(adapter);
FsmChangeState(fi, ST_L1_F6);
}
static void
l1_go_f7(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
FsmDelTimer(&adapter->timer, 0);
ph_connect(adapter);
FsmChangeState(fi, ST_L1_F7);
D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL);
}
static void
l1_go_f8(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
if (fi->state == ST_L1_F7)
ph_disconnect(adapter);
FsmChangeState(fi, ST_L1_F8);
}
static void
l1_timer3(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
st5481_ph_command(adapter, ST5481_CMD_DR);
FsmChangeState(fi, ST_L1_F3);
D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
}
static void
l1_ignore(struct FsmInst *fi, int event, void *arg)
{
}
static void
l1_activate(struct FsmInst *fi, int event, void *arg)
{
struct st5481_adapter *adapter = fi->userdata;
st5481_ph_command(adapter, ST5481_CMD_DR);
st5481_ph_command(adapter, ST5481_CMD_PUP);
FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
st5481_ph_command(adapter, ST5481_CMD_AR8);
FsmChangeState(fi, ST_L1_F4);
}
static struct FsmNode L1FnList[] __initdata =
{
{ST_L1_F3, EV_IND_DP, l1_ignore},
{ST_L1_F3, EV_IND_AP, l1_go_f6},
{ST_L1_F3, EV_IND_AI8, l1_go_f7},
{ST_L1_F3, EV_IND_AI10, l1_go_f7},
{ST_L1_F3, EV_PH_ACTIVATE_REQ, l1_activate},
{ST_L1_F4, EV_TIMER3, l1_timer3},
{ST_L1_F4, EV_IND_DP, l1_go_f3},
{ST_L1_F4, EV_IND_AP, l1_go_f6},
{ST_L1_F4, EV_IND_AI8, l1_go_f7},
{ST_L1_F4, EV_IND_AI10, l1_go_f7},
{ST_L1_F6, EV_TIMER3, l1_timer3},
{ST_L1_F6, EV_IND_DP, l1_go_f3},
{ST_L1_F6, EV_IND_AP, l1_ignore},
{ST_L1_F6, EV_IND_AI8, l1_go_f7},
{ST_L1_F6, EV_IND_AI10, l1_go_f7},
{ST_L1_F7, EV_IND_RSY, l1_go_f8},
{ST_L1_F7, EV_IND_DP, l1_go_f3},
{ST_L1_F7, EV_IND_AP, l1_go_f6},
{ST_L1_F7, EV_IND_AI8, l1_ignore},
{ST_L1_F7, EV_IND_AI10, l1_ignore},
{ST_L1_F7, EV_IND_RSY, l1_go_f8},
{ST_L1_F8, EV_TIMER3, l1_timer3},
{ST_L1_F8, EV_IND_DP, l1_go_f3},
{ST_L1_F8, EV_IND_AP, l1_go_f6},
{ST_L1_F8, EV_IND_AI8, l1_go_f8},
{ST_L1_F8, EV_IND_AI10, l1_go_f8},
{ST_L1_F8, EV_IND_RSY, l1_ignore},
};
static void l1m_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
char buf[256];
va_start(args, fmt);
vsprintf(buf, fmt, args);
DBG(8, "%s", buf);
va_end(args);
}
/* ======================================================================
* D-Channel out
*/
/*
D OUT state machine:
====================
Transmit short frame (< 16 bytes of encoded data):
L1 FRAME D_OUT_STATE USB D CHANNEL
-------- ----------- --- ---------
FIXME
-> [xx..xx] SHORT_INIT -> [7Exx..xxC1C27EFF]
SHORT_WAIT_DEN <> OUT_D_COUNTER=16
END_OF_SHORT <- DEN_EVENT -> 7Exx
xxxx
xxxx
xxxx
xxxx
xxxx
C1C1
7EFF
WAIT_FOR_RESET_IDLE <- D_UNDERRUN <- (8ms)
IDLE <> Reset pipe
Transmit long frame (>= 16 bytes of encoded data):
L1 FRAME D_OUT_STATE USB D CHANNEL
-------- ----------- --- ---------
-> [xx...xx] IDLE
WAIT_FOR_STOP <> OUT_D_COUNTER=0
WAIT_FOR_RESET <> Reset pipe
STOP
INIT_LONG_FRAME -> [7Exx..xx]
WAIT_DEN <> OUT_D_COUNTER=16
OUT_NORMAL <- DEN_EVENT -> 7Exx
END_OF_FRAME_BUSY -> [xxxx] xxxx
END_OF_FRAME_NOT_BUSY -> [xxxx] xxxx
-> [xxxx] xxxx
-> [C1C2] xxxx
-> [7EFF] xxxx
xxxx
xxxx
....
xxxx
C1C2
7EFF
<- D_UNDERRUN <- (> 8ms)
WAIT_FOR_STOP <> OUT_D_COUNTER=0
WAIT_FOR_RESET <> Reset pipe
STOP
*/
static struct Fsm dout_fsm;
static char *strDoutState[] =
{
"ST_DOUT_NONE",
"ST_DOUT_SHORT_INIT",
"ST_DOUT_SHORT_WAIT_DEN",
"ST_DOUT_LONG_INIT",
"ST_DOUT_LONG_WAIT_DEN",
"ST_DOUT_NORMAL",
"ST_DOUT_WAIT_FOR_UNDERRUN",
"ST_DOUT_WAIT_FOR_NOT_BUSY",
"ST_DOUT_WAIT_FOR_STOP",
"ST_DOUT_WAIT_FOR_RESET",
};
static char *strDoutEvent[] =
{
"EV_DOUT_START_XMIT",
"EV_DOUT_COMPLETE",
"EV_DOUT_DEN",
"EV_DOUT_RESETED",
"EV_DOUT_STOPPED",
"EV_DOUT_COLL",
"EV_DOUT_UNDERRUN",
};
static void dout_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
char buf[256];
va_start(args, fmt);
vsprintf(buf, fmt, args);
DBG(0x2, "%s", buf);
va_end(args);
}
static void dout_stop_event(void *context)
{
struct st5481_adapter *adapter = context;
FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL);
}
/*
* Start the transfer of a D channel frame.
*/
static void usb_d_out(struct st5481_adapter *adapter, int buf_nr)
{
struct st5481_d_out *d_out = &adapter->d_out;
struct urb *urb;
unsigned int num_packets, packet_offset;
int len, buf_size, bytes_sent;
struct sk_buff *skb;
struct usb_iso_packet_descriptor *desc;
if (d_out->fsm.state != ST_DOUT_NORMAL)
return;
if (test_and_set_bit(buf_nr, &d_out->busy)) {
DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
return;
}
urb = d_out->urb[buf_nr];
skb = d_out->tx_skb;
buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT;
if (skb) {
len = isdnhdlc_encode(&d_out->hdlc_state,
skb->data, skb->len, &bytes_sent,
urb->transfer_buffer, buf_size);
skb_pull(skb,bytes_sent);
} else {
// Send flags or idle
len = isdnhdlc_encode(&d_out->hdlc_state,
NULL, 0, &bytes_sent,
urb->transfer_buffer, buf_size);
}
if (len < buf_size) {
FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
}
if (skb && !skb->len) {
d_out->tx_skb = NULL;
D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
dev_kfree_skb_any(skb);
}
// Prepare the URB
urb->transfer_buffer_length = len;
num_packets = 0;
packet_offset = 0;
while (packet_offset < len) {
desc = &urb->iso_frame_desc[num_packets];
desc->offset = packet_offset;
desc->length = SIZE_ISO_PACKETS_D_OUT;
if (len - packet_offset < desc->length)
desc->length = len - packet_offset;
num_packets++;
packet_offset += desc->length;
}
urb->number_of_packets = num_packets;
// Prepare the URB
urb->dev = adapter->usb_dev;
// Need to transmit the next buffer 2ms after the DEN_EVENT
urb->transfer_flags = 0;
urb->start_frame = usb_get_current_frame_number(adapter->usb_dev)+2;
DBG_ISO_PACKET(0x20,urb);
if (usb_submit_urb(urb, GFP_KERNEL) < 0) {
// There is another URB queued up
urb->transfer_flags = URB_ISO_ASAP;
SUBMIT_URB(urb, GFP_KERNEL);
}
}
static void fifo_reseted(void *context)
{
struct st5481_adapter *adapter = context;
FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL);
}
static void usb_d_out_complete(struct urb *urb)
{
struct st5481_adapter *adapter = urb->context;
struct st5481_d_out *d_out = &adapter->d_out;
long buf_nr;
DBG(2, "");
buf_nr = get_buf_nr(d_out->urb, urb);
test_and_clear_bit(buf_nr, &d_out->busy);
if (unlikely(urb->status < 0)) {
switch (urb->status) {
case -ENOENT:
case -ESHUTDOWN:
case -ECONNRESET:
DBG(1,"urb killed status %d", urb->status);
break;
default:
WARN("urb status %d",urb->status);
if (d_out->busy == 0) {
st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
}
break;
}
return; // Give up
}
FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr);
}
/* ====================================================================== */
static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg)
{
// FIXME unify?
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
struct urb *urb;
int len, bytes_sent;
struct sk_buff *skb;
int buf_nr = 0;
skb = d_out->tx_skb;
DBG(2,"len=%d",skb->len);
isdnhdlc_out_init(&d_out->hdlc_state, 1, 0);
if (test_and_set_bit(buf_nr, &d_out->busy)) {
WARN("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
return;
}
urb = d_out->urb[buf_nr];
DBG_SKB(0x10, skb);
len = isdnhdlc_encode(&d_out->hdlc_state,
skb->data, skb->len, &bytes_sent,
urb->transfer_buffer, 16);
skb_pull(skb, bytes_sent);
if(len < 16)
FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT);
else
FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT);
if (skb->len == 0) {
d_out->tx_skb = NULL;
D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
dev_kfree_skb_any(skb);
}
// Prepare the URB
urb->transfer_buffer_length = len;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = len;
urb->number_of_packets = 1;
// Prepare the URB
urb->dev = adapter->usb_dev;
urb->transfer_flags = URB_ISO_ASAP;
DBG_ISO_PACKET(0x20,urb);
SUBMIT_URB(urb, GFP_KERNEL);
}
static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN);
st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
}
static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
}
static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN);
}
static void dout_long_den(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL);
usb_d_out(adapter, 0);
usb_d_out(adapter, 1);
}
static void dout_reset(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET);
st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
}
static void dout_stop(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP);
st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter);
}
static void dout_underrun(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) {
FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY);
} else {
dout_stop(fsm, event, arg);
}
}
static void dout_check_busy(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy))
dout_stop(fsm, event, arg);
}
static void dout_reseted(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
struct st5481_d_out *d_out = &adapter->d_out;
FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
// FIXME locking
if (d_out->tx_skb)
FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL);
}
static void dout_complete(struct FsmInst *fsm, int event, void *arg)
{
struct st5481_adapter *adapter = fsm->userdata;
long buf_nr = (long) arg;
usb_d_out(adapter, buf_nr);
}
static void dout_ignore(struct FsmInst *fsm, int event, void *arg)
{
}
static struct FsmNode DoutFnList[] __initdata =
{
{ST_DOUT_NONE, EV_DOUT_START_XMIT, dout_start_xmit},
{ST_DOUT_SHORT_INIT, EV_DOUT_COMPLETE, dout_short_fifo},
{ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_DEN, dout_end_short_frame},
{ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun},
{ST_DOUT_LONG_INIT, EV_DOUT_COMPLETE, dout_long_enable_fifo},
{ST_DOUT_LONG_WAIT_DEN, EV_DOUT_DEN, dout_long_den},
{ST_DOUT_LONG_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun},
{ST_DOUT_NORMAL, EV_DOUT_UNDERRUN, dout_underrun},
{ST_DOUT_NORMAL, EV_DOUT_COMPLETE, dout_complete},
{ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_UNDERRUN, dout_underrun},
{ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_COMPLETE, dout_ignore},
{ST_DOUT_WAIT_FOR_NOT_BUSY, EV_DOUT_COMPLETE, dout_check_busy},
{ST_DOUT_WAIT_FOR_STOP, EV_DOUT_STOPPED, dout_reset},
{ST_DOUT_WAIT_FOR_RESET, EV_DOUT_RESETED, dout_reseted},
};
void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg)
{
struct st5481_adapter *adapter = hisax_d_if->priv;
struct sk_buff *skb = arg;
switch (pr) {
case PH_ACTIVATE | REQUEST:
FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL);
break;
case PH_DEACTIVATE | REQUEST:
FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL);
break;
case PH_DATA | REQUEST:
DBG(2, "PH_DATA REQUEST len %d", skb->len);
BUG_ON(adapter->d_out.tx_skb);
adapter->d_out.tx_skb = skb;
FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL);
break;
default:
WARN("pr %#x\n", pr);
break;
}
}
/* ======================================================================
*/
/*
* Start receiving on the D channel since entered state F7.
*/
static void ph_connect(struct st5481_adapter *adapter)
{
struct st5481_d_out *d_out = &adapter->d_out;
struct st5481_in *d_in = &adapter->d_in;
DBG(8,"");
FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
// st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL);
st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL);
st5481_in_mode(d_in, L1_MODE_HDLC);
#ifdef LOOPBACK
// Turn loopback on (data sent on B and D looped back)
st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL);
#endif
st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL);
// Turn on the green LED to tell that we are in state F7
adapter->leds |= GREEN_LED;
st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
}
/*
* Stop receiving on the D channel since not in state F7.
*/
static void ph_disconnect(struct st5481_adapter *adapter)
{
DBG(8,"");
st5481_in_mode(&adapter->d_in, L1_MODE_NULL);
// Turn off the green LED to tell that we left state F7
adapter->leds &= ~GREEN_LED;
st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
}
static int st5481_setup_d_out(struct st5481_adapter *adapter)
{
struct usb_device *dev = adapter->usb_dev;
struct usb_interface *intf;
struct usb_host_interface *altsetting = NULL;
struct usb_host_endpoint *endpoint;
struct st5481_d_out *d_out = &adapter->d_out;
DBG(2,"");
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 D channel out
endpoint = &altsetting->endpoint[EP_D_OUT-1];
DBG(2,"endpoint address=%02x,packet size=%d",
endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
return st5481_setup_isocpipes(d_out->urb, dev,
usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT,
NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT,
usb_d_out_complete, adapter);
}
static void st5481_release_d_out(struct st5481_adapter *adapter)
{
struct st5481_d_out *d_out = &adapter->d_out;
DBG(2,"");
st5481_release_isocpipes(d_out->urb);
}
int st5481_setup_d(struct st5481_adapter *adapter)
{
int retval;
DBG(2,"");
retval = st5481_setup_d_out(adapter);
if (retval)
goto err;
adapter->d_in.bufsize = MAX_DFRAME_LEN_L1;
adapter->d_in.num_packets = NUM_ISO_PACKETS_D;
adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN;
adapter->d_in.ep = EP_D_IN | USB_DIR_IN;
adapter->d_in.counter = IN_D_COUNTER;
adapter->d_in.adapter = adapter;
adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc;
retval = st5481_setup_in(&adapter->d_in);
if (retval)
goto err_d_out;
adapter->l1m.fsm = &l1fsm;
adapter->l1m.state = ST_L1_F3;
adapter->l1m.debug = st5481_debug & 0x100;
adapter->l1m.userdata = adapter;
adapter->l1m.printdebug = l1m_debug;
FsmInitTimer(&adapter->l1m, &adapter->timer);
adapter->d_out.fsm.fsm = &dout_fsm;
adapter->d_out.fsm.state = ST_DOUT_NONE;
adapter->d_out.fsm.debug = st5481_debug & 0x100;
adapter->d_out.fsm.userdata = adapter;
adapter->d_out.fsm.printdebug = dout_debug;
return 0;
err_d_out:
st5481_release_d_out(adapter);
err:
return retval;
}
void st5481_release_d(struct st5481_adapter *adapter)
{
DBG(2,"");
st5481_release_in(&adapter->d_in);
st5481_release_d_out(adapter);
}
/* ======================================================================
* init / exit
*/
int __init st5481_d_init(void)
{
int retval;
l1fsm.state_count = L1_STATE_COUNT;
l1fsm.event_count = L1_EVENT_COUNT;
l1fsm.strEvent = strL1Event;
l1fsm.strState = strL1State;
retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList));
if (retval)
goto err;
dout_fsm.state_count = DOUT_STATE_COUNT;
dout_fsm.event_count = DOUT_EVENT_COUNT;
dout_fsm.strEvent = strDoutEvent;
dout_fsm.strState = strDoutState;
retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList));
if (retval)
goto err_l1;
return 0;
err_l1:
FsmFree(&l1fsm);
err:
return retval;
}
// can't be __exit
void st5481_d_exit(void)
{
FsmFree(&l1fsm);
FsmFree(&dout_fsm);
}
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