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linux-next/drivers/isdn/hisax/hisax_isac.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

896 lines
22 KiB
C
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/*
* Driver for ISAC-S and ISAC-SX
* ISDN Subscriber Access Controller for Terminals
*
* Author Kai Germaschewski
* Copyright 2001 by Kai Germaschewski <kai.germaschewski@gmx.de>
* 2001 by Karsten Keil <keil@isdn4linux.de>
*
* based upon Karsten Keil's original isac.c driver
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* Thanks to Wizard Computersysteme GmbH, Bremervoerde and
* SoHaNet Technology GmbH, Berlin
* for supporting the development of this driver
*/
/* TODO:
* specifically handle level vs edge triggered?
*/
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include "hisax_isac.h"
// debugging cruft
#define __debug_variable debug
#include "hisax_debug.h"
#ifdef CONFIG_HISAX_DEBUG
static int debug = 1;
module_param(debug, int, 0);
static char *ISACVer[] = {
"2086/2186 V1.1",
"2085 B1",
"2085 B2",
"2085 V2.3"
};
#endif
MODULE_AUTHOR("Kai Germaschewski <kai.germaschewski@gmx.de>/Karsten Keil <kkeil@suse.de>");
MODULE_DESCRIPTION("ISAC/ISAC-SX driver");
MODULE_LICENSE("GPL");
#define DBG_WARN 0x0001
#define DBG_IRQ 0x0002
#define DBG_L1M 0x0004
#define DBG_PR 0x0008
#define DBG_RFIFO 0x0100
#define DBG_RPACKET 0x0200
#define DBG_XFIFO 0x1000
#define DBG_XPACKET 0x2000
// we need to distinguish ISAC-S and ISAC-SX
#define TYPE_ISAC 0x00
#define TYPE_ISACSX 0x01
// registers etc.
#define ISAC_MASK 0x20
#define ISAC_ISTA 0x20
#define ISAC_ISTA_EXI 0x01
#define ISAC_ISTA_SIN 0x02
#define ISAC_ISTA_CISQ 0x04
#define ISAC_ISTA_XPR 0x10
#define ISAC_ISTA_RSC 0x20
#define ISAC_ISTA_RPF 0x40
#define ISAC_ISTA_RME 0x80
#define ISAC_STAR 0x21
#define ISAC_CMDR 0x21
#define ISAC_CMDR_XRES 0x01
#define ISAC_CMDR_XME 0x02
#define ISAC_CMDR_XTF 0x08
#define ISAC_CMDR_RRES 0x40
#define ISAC_CMDR_RMC 0x80
#define ISAC_EXIR 0x24
#define ISAC_EXIR_MOS 0x04
#define ISAC_EXIR_XDU 0x40
#define ISAC_EXIR_XMR 0x80
#define ISAC_ADF2 0x39
#define ISAC_SPCR 0x30
#define ISAC_ADF1 0x38
#define ISAC_CIR0 0x31
#define ISAC_CIX0 0x31
#define ISAC_CIR0_CIC0 0x02
#define ISAC_CIR0_CIC1 0x01
#define ISAC_CIR1 0x33
#define ISAC_CIX1 0x33
#define ISAC_STCR 0x37
#define ISAC_MODE 0x22
#define ISAC_RSTA 0x27
#define ISAC_RSTA_RDO 0x40
#define ISAC_RSTA_CRC 0x20
#define ISAC_RSTA_RAB 0x10
#define ISAC_RBCL 0x25
#define ISAC_RBCH 0x2A
#define ISAC_TIMR 0x23
#define ISAC_SQXR 0x3b
#define ISAC_MOSR 0x3a
#define ISAC_MOCR 0x3a
#define ISAC_MOR0 0x32
#define ISAC_MOX0 0x32
#define ISAC_MOR1 0x34
#define ISAC_MOX1 0x34
#define ISAC_RBCH_XAC 0x80
#define ISAC_CMD_TIM 0x0
#define ISAC_CMD_RES 0x1
#define ISAC_CMD_SSP 0x2
#define ISAC_CMD_SCP 0x3
#define ISAC_CMD_AR8 0x8
#define ISAC_CMD_AR10 0x9
#define ISAC_CMD_ARL 0xa
#define ISAC_CMD_DI 0xf
#define ISACSX_MASK 0x60
#define ISACSX_ISTA 0x60
#define ISACSX_ISTA_ICD 0x01
#define ISACSX_ISTA_CIC 0x10
#define ISACSX_MASKD 0x20
#define ISACSX_ISTAD 0x20
#define ISACSX_ISTAD_XDU 0x04
#define ISACSX_ISTAD_XMR 0x08
#define ISACSX_ISTAD_XPR 0x10
#define ISACSX_ISTAD_RFO 0x20
#define ISACSX_ISTAD_RPF 0x40
#define ISACSX_ISTAD_RME 0x80
#define ISACSX_CMDRD 0x21
#define ISACSX_CMDRD_XRES 0x01
#define ISACSX_CMDRD_XME 0x02
#define ISACSX_CMDRD_XTF 0x08
#define ISACSX_CMDRD_RRES 0x40
#define ISACSX_CMDRD_RMC 0x80
#define ISACSX_MODED 0x22
#define ISACSX_RBCLD 0x26
#define ISACSX_RSTAD 0x28
#define ISACSX_RSTAD_RAB 0x10
#define ISACSX_RSTAD_CRC 0x20
#define ISACSX_RSTAD_RDO 0x40
#define ISACSX_RSTAD_VFR 0x80
#define ISACSX_CIR0 0x2e
#define ISACSX_CIR0_CIC0 0x08
#define ISACSX_CIX0 0x2e
#define ISACSX_TR_CONF0 0x30
#define ISACSX_TR_CONF2 0x32
static struct Fsm l1fsm;
enum {
ST_L1_RESET,
ST_L1_F3_PDOWN,
ST_L1_F3_PUP,
ST_L1_F3_PEND_DEACT,
ST_L1_F4,
ST_L1_F5,
ST_L1_F6,
ST_L1_F7,
ST_L1_F8,
};
#define L1_STATE_COUNT (ST_L1_F8+1)
static char *strL1State[] =
{
"ST_L1_RESET",
"ST_L1_F3_PDOWN",
"ST_L1_F3_PUP",
"ST_L1_F3_PEND_DEACT",
"ST_L1_F4",
"ST_L1_F5",
"ST_L1_F6",
"ST_L1_F7",
"ST_L1_F8",
};
enum {
EV_PH_DR, // 0000
EV_PH_RES, // 0001
EV_PH_TMA, // 0010
EV_PH_SLD, // 0011
EV_PH_RSY, // 0100
EV_PH_DR6, // 0101
EV_PH_EI, // 0110
EV_PH_PU, // 0111
EV_PH_AR, // 1000
EV_PH_9, // 1001
EV_PH_ARL, // 1010
EV_PH_CVR, // 1011
EV_PH_AI8, // 1100
EV_PH_AI10, // 1101
EV_PH_AIL, // 1110
EV_PH_DC, // 1111
EV_PH_ACTIVATE_REQ,
EV_PH_DEACTIVATE_REQ,
EV_TIMER3,
};
#define L1_EVENT_COUNT (EV_TIMER3 + 1)
static char *strL1Event[] =
{
"EV_PH_DR", // 0000
"EV_PH_RES", // 0001
"EV_PH_TMA", // 0010
"EV_PH_SLD", // 0011
"EV_PH_RSY", // 0100
"EV_PH_DR6", // 0101
"EV_PH_EI", // 0110
"EV_PH_PU", // 0111
"EV_PH_AR", // 1000
"EV_PH_9", // 1001
"EV_PH_ARL", // 1010
"EV_PH_CVR", // 1011
"EV_PH_AI8", // 1100
"EV_PH_AI10", // 1101
"EV_PH_AIL", // 1110
"EV_PH_DC", // 1111
"EV_PH_ACTIVATE_REQ",
"EV_PH_DEACTIVATE_REQ",
"EV_TIMER3",
};
static inline void D_L1L2(struct isac *isac, int pr, void *arg)
{
struct hisax_if *ifc = (struct hisax_if *) &isac->hisax_d_if;
DBG(DBG_PR, "pr %#x", pr);
ifc->l1l2(ifc, pr, arg);
}
static void ph_command(struct isac *isac, unsigned int command)
{
DBG(DBG_L1M, "ph_command %#x", command);
switch (isac->type) {
case TYPE_ISAC:
isac->write_isac(isac, ISAC_CIX0, (command << 2) | 3);
break;
case TYPE_ISACSX:
isac->write_isac(isac, ISACSX_CIX0, (command << 4) | (7 << 1));
break;
}
}
// ----------------------------------------------------------------------
static void l1_di(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_RESET);
ph_command(isac, ISAC_CMD_DI);
}
static void l1_di_deact_ind(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_RESET);
D_L1L2(isac, PH_DEACTIVATE | INDICATION, NULL);
ph_command(isac, ISAC_CMD_DI);
}
static void l1_go_f3pdown(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L1_F3_PDOWN);
}
static void l1_go_f3pend_deact_ind(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_F3_PEND_DEACT);
D_L1L2(isac, PH_DEACTIVATE | INDICATION, NULL);
ph_command(isac, ISAC_CMD_DI);
}
static void l1_go_f3pend(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_F3_PEND_DEACT);
ph_command(isac, ISAC_CMD_DI);
}
static void l1_go_f4(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L1_F4);
}
static void l1_go_f5(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L1_F5);
}
static void l1_go_f6(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L1_F6);
}
static void l1_go_f6_deact_ind(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_F6);
D_L1L2(isac, PH_DEACTIVATE | INDICATION, NULL);
}
static void l1_go_f7_act_ind(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmDelTimer(&isac->timer, 0);
FsmChangeState(fi, ST_L1_F7);
ph_command(isac, ISAC_CMD_AR8);
D_L1L2(isac, PH_ACTIVATE | INDICATION, NULL);
}
static void l1_go_f8(struct FsmInst *fi, int event, void *arg)
{
FsmChangeState(fi, ST_L1_F8);
}
static void l1_go_f8_deact_ind(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmChangeState(fi, ST_L1_F8);
D_L1L2(isac, PH_DEACTIVATE | INDICATION, NULL);
}
static void l1_ar8(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
FsmRestartTimer(&isac->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
ph_command(isac, ISAC_CMD_AR8);
}
static void l1_timer3(struct FsmInst *fi, int event, void *arg)
{
struct isac *isac = fi->userdata;
ph_command(isac, ISAC_CMD_DI);
D_L1L2(isac, PH_DEACTIVATE | INDICATION, NULL);
}
// state machines according to data sheet PSB 2186 / 3186
static struct FsmNode L1FnList[] __initdata =
{
{ST_L1_RESET, EV_PH_RES, l1_di},
{ST_L1_RESET, EV_PH_EI, l1_di},
{ST_L1_RESET, EV_PH_DC, l1_go_f3pdown},
{ST_L1_RESET, EV_PH_AR, l1_go_f6},
{ST_L1_RESET, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F3_PDOWN, EV_PH_RES, l1_di},
{ST_L1_F3_PDOWN, EV_PH_EI, l1_di},
{ST_L1_F3_PDOWN, EV_PH_AR, l1_go_f6},
{ST_L1_F3_PDOWN, EV_PH_RSY, l1_go_f5},
{ST_L1_F3_PDOWN, EV_PH_PU, l1_go_f4},
{ST_L1_F3_PDOWN, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F3_PDOWN, EV_PH_ACTIVATE_REQ, l1_ar8},
{ST_L1_F3_PDOWN, EV_TIMER3, l1_timer3},
{ST_L1_F3_PEND_DEACT, EV_PH_RES, l1_di},
{ST_L1_F3_PEND_DEACT, EV_PH_EI, l1_di},
{ST_L1_F3_PEND_DEACT, EV_PH_DC, l1_go_f3pdown},
{ST_L1_F3_PEND_DEACT, EV_PH_RSY, l1_go_f5},
{ST_L1_F3_PEND_DEACT, EV_PH_AR, l1_go_f6},
{ST_L1_F3_PEND_DEACT, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F4, EV_PH_RES, l1_di},
{ST_L1_F4, EV_PH_EI, l1_di},
{ST_L1_F4, EV_PH_RSY, l1_go_f5},
{ST_L1_F4, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F4, EV_TIMER3, l1_timer3},
{ST_L1_F4, EV_PH_DC, l1_go_f3pdown},
{ST_L1_F5, EV_PH_RES, l1_di},
{ST_L1_F5, EV_PH_EI, l1_di},
{ST_L1_F5, EV_PH_AR, l1_go_f6},
{ST_L1_F5, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F5, EV_TIMER3, l1_timer3},
{ST_L1_F5, EV_PH_DR, l1_go_f3pend},
{ST_L1_F5, EV_PH_DC, l1_go_f3pdown},
{ST_L1_F6, EV_PH_RES, l1_di},
{ST_L1_F6, EV_PH_EI, l1_di},
{ST_L1_F6, EV_PH_RSY, l1_go_f8},
{ST_L1_F6, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F6, EV_PH_DR6, l1_go_f3pend},
{ST_L1_F6, EV_TIMER3, l1_timer3},
{ST_L1_F6, EV_PH_DC, l1_go_f3pdown},
{ST_L1_F7, EV_PH_RES, l1_di_deact_ind},
{ST_L1_F7, EV_PH_EI, l1_di_deact_ind},
{ST_L1_F7, EV_PH_AR, l1_go_f6_deact_ind},
{ST_L1_F7, EV_PH_RSY, l1_go_f8_deact_ind},
{ST_L1_F7, EV_PH_DR, l1_go_f3pend_deact_ind},
{ST_L1_F8, EV_PH_RES, l1_di},
{ST_L1_F8, EV_PH_EI, l1_di},
{ST_L1_F8, EV_PH_AR, l1_go_f6},
{ST_L1_F8, EV_PH_DR, l1_go_f3pend},
{ST_L1_F8, EV_PH_AI8, l1_go_f7_act_ind},
{ST_L1_F8, EV_TIMER3, l1_timer3},
{ST_L1_F8, EV_PH_DC, l1_go_f3pdown},
};
static void l1m_debug(struct FsmInst *fi, char *fmt, ...)
{
va_list args;
char buf[256];
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
DBG(DBG_L1M, "%s", buf);
va_end(args);
}
static void isac_version(struct isac *cs)
{
int val;
val = cs->read_isac(cs, ISAC_RBCH);
DBG(1, "ISAC version (%x): %s", val, ISACVer[(val >> 5) & 3]);
}
static void isac_empty_fifo(struct isac *isac, int count)
{
// this also works for isacsx, since
// CMDR(D) register works the same
u_char *ptr;
DBG(DBG_IRQ, "count %d", count);
if ((isac->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
DBG(DBG_WARN, "overrun %d", isac->rcvidx + count);
isac->write_isac(isac, ISAC_CMDR, ISAC_CMDR_RMC);
isac->rcvidx = 0;
return;
}
ptr = isac->rcvbuf + isac->rcvidx;
isac->rcvidx += count;
isac->read_isac_fifo(isac, ptr, count);
isac->write_isac(isac, ISAC_CMDR, ISAC_CMDR_RMC);
DBG_PACKET(DBG_RFIFO, ptr, count);
}
static void isac_fill_fifo(struct isac *isac)
{
// this also works for isacsx, since
// CMDR(D) register works the same
int count;
unsigned char cmd;
u_char *ptr;
BUG_ON(!isac->tx_skb);
count = isac->tx_skb->len;
BUG_ON(count <= 0);
DBG(DBG_IRQ, "count %d", count);
if (count > 0x20) {
count = 0x20;
cmd = ISAC_CMDR_XTF;
} else {
cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
}
ptr = isac->tx_skb->data;
skb_pull(isac->tx_skb, count);
isac->tx_cnt += count;
DBG_PACKET(DBG_XFIFO, ptr, count);
isac->write_isac_fifo(isac, ptr, count);
isac->write_isac(isac, ISAC_CMDR, cmd);
}
static void isac_retransmit(struct isac *isac)
{
if (!isac->tx_skb) {
DBG(DBG_WARN, "no skb");
return;
}
skb_push(isac->tx_skb, isac->tx_cnt);
isac->tx_cnt = 0;
}
static inline void isac_cisq_interrupt(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISAC_CIR0);
DBG(DBG_IRQ, "CIR0 %#x", val);
if (val & ISAC_CIR0_CIC0) {
DBG(DBG_IRQ, "CODR0 %#x", (val >> 2) & 0xf);
FsmEvent(&isac->l1m, (val >> 2) & 0xf, NULL);
}
if (val & ISAC_CIR0_CIC1) {
val = isac->read_isac(isac, ISAC_CIR1);
DBG(DBG_WARN, "ISAC CIR1 %#x", val );
}
}
static inline void isac_rme_interrupt(struct isac *isac)
{
unsigned char val;
int count;
struct sk_buff *skb;
val = isac->read_isac(isac, ISAC_RSTA);
if ((val & (ISAC_RSTA_RDO | ISAC_RSTA_CRC | ISAC_RSTA_RAB) )
!= ISAC_RSTA_CRC) {
DBG(DBG_WARN, "RSTA %#x, dropped", val);
isac->write_isac(isac, ISAC_CMDR, ISAC_CMDR_RMC);
goto out;
}
count = isac->read_isac(isac, ISAC_RBCL) & 0x1f;
DBG(DBG_IRQ, "RBCL %#x", count);
if (count == 0)
count = 0x20;
isac_empty_fifo(isac, count);
count = isac->rcvidx;
if (count < 1) {
DBG(DBG_WARN, "count %d < 1", count);
goto out;
}
skb = alloc_skb(count, GFP_ATOMIC);
if (!skb) {
DBG(DBG_WARN, "no memory, dropping\n");
goto out;
}
memcpy(skb_put(skb, count), isac->rcvbuf, count);
DBG_SKB(DBG_RPACKET, skb);
D_L1L2(isac, PH_DATA | INDICATION, skb);
out:
isac->rcvidx = 0;
}
static inline void isac_xpr_interrupt(struct isac *isac)
{
if (!isac->tx_skb)
return;
if (isac->tx_skb->len > 0) {
isac_fill_fifo(isac);
return;
}
dev_kfree_skb_irq(isac->tx_skb);
isac->tx_cnt = 0;
isac->tx_skb = NULL;
D_L1L2(isac, PH_DATA | CONFIRM, NULL);
}
static inline void isac_exi_interrupt(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISAC_EXIR);
DBG(2, "EXIR %#x", val);
if (val & ISAC_EXIR_XMR) {
DBG(DBG_WARN, "ISAC XMR");
isac_retransmit(isac);
}
if (val & ISAC_EXIR_XDU) {
DBG(DBG_WARN, "ISAC XDU");
isac_retransmit(isac);
}
if (val & ISAC_EXIR_MOS) { /* MOS */
DBG(DBG_WARN, "MOS");
val = isac->read_isac(isac, ISAC_MOSR);
DBG(2, "ISAC MOSR %#x", val);
}
}
void isac_irq(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISAC_ISTA);
DBG(DBG_IRQ, "ISTA %#x", val);
if (val & ISAC_ISTA_EXI) {
DBG(DBG_IRQ, "EXI");
isac_exi_interrupt(isac);
}
if (val & ISAC_ISTA_XPR) {
DBG(DBG_IRQ, "XPR");
isac_xpr_interrupt(isac);
}
if (val & ISAC_ISTA_RME) {
DBG(DBG_IRQ, "RME");
isac_rme_interrupt(isac);
}
if (val & ISAC_ISTA_RPF) {
DBG(DBG_IRQ, "RPF");
isac_empty_fifo(isac, 0x20);
}
if (val & ISAC_ISTA_CISQ) {
DBG(DBG_IRQ, "CISQ");
isac_cisq_interrupt(isac);
}
if (val & ISAC_ISTA_RSC) {
DBG(DBG_WARN, "RSC");
}
if (val & ISAC_ISTA_SIN) {
DBG(DBG_WARN, "SIN");
}
isac->write_isac(isac, ISAC_MASK, 0xff);
isac->write_isac(isac, ISAC_MASK, 0x00);
}
// ======================================================================
static inline void isacsx_cic_interrupt(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISACSX_CIR0);
DBG(DBG_IRQ, "CIR0 %#x", val);
if (val & ISACSX_CIR0_CIC0) {
DBG(DBG_IRQ, "CODR0 %#x", val >> 4);
FsmEvent(&isac->l1m, val >> 4, NULL);
}
}
static inline void isacsx_rme_interrupt(struct isac *isac)
{
int count;
struct sk_buff *skb;
unsigned char val;
val = isac->read_isac(isac, ISACSX_RSTAD);
if ((val & (ISACSX_RSTAD_VFR |
ISACSX_RSTAD_RDO |
ISACSX_RSTAD_CRC |
ISACSX_RSTAD_RAB))
!= (ISACSX_RSTAD_VFR | ISACSX_RSTAD_CRC)) {
DBG(DBG_WARN, "RSTAD %#x, dropped", val);
isac->write_isac(isac, ISACSX_CMDRD, ISACSX_CMDRD_RMC);
goto out;
}
count = isac->read_isac(isac, ISACSX_RBCLD) & 0x1f;
DBG(DBG_IRQ, "RBCLD %#x", count);
if (count == 0)
count = 0x20;
isac_empty_fifo(isac, count);
// strip trailing status byte
count = isac->rcvidx - 1;
if (count < 1) {
DBG(DBG_WARN, "count %d < 1", count);
goto out;
}
skb = dev_alloc_skb(count);
if (!skb) {
DBG(DBG_WARN, "no memory, dropping");
goto out;
}
memcpy(skb_put(skb, count), isac->rcvbuf, count);
DBG_SKB(DBG_RPACKET, skb);
D_L1L2(isac, PH_DATA | INDICATION, skb);
out:
isac->rcvidx = 0;
}
static inline void isacsx_xpr_interrupt(struct isac *isac)
{
if (!isac->tx_skb)
return;
if (isac->tx_skb->len > 0) {
isac_fill_fifo(isac);
return;
}
dev_kfree_skb_irq(isac->tx_skb);
isac->tx_skb = NULL;
isac->tx_cnt = 0;
D_L1L2(isac, PH_DATA | CONFIRM, NULL);
}
static inline void isacsx_icd_interrupt(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISACSX_ISTAD);
DBG(DBG_IRQ, "ISTAD %#x", val);
if (val & ISACSX_ISTAD_XDU) {
DBG(DBG_WARN, "ISTAD XDU");
isac_retransmit(isac);
}
if (val & ISACSX_ISTAD_XMR) {
DBG(DBG_WARN, "ISTAD XMR");
isac_retransmit(isac);
}
if (val & ISACSX_ISTAD_XPR) {
DBG(DBG_IRQ, "ISTAD XPR");
isacsx_xpr_interrupt(isac);
}
if (val & ISACSX_ISTAD_RFO) {
DBG(DBG_WARN, "ISTAD RFO");
isac->write_isac(isac, ISACSX_CMDRD, ISACSX_CMDRD_RMC);
}
if (val & ISACSX_ISTAD_RME) {
DBG(DBG_IRQ, "ISTAD RME");
isacsx_rme_interrupt(isac);
}
if (val & ISACSX_ISTAD_RPF) {
DBG(DBG_IRQ, "ISTAD RPF");
isac_empty_fifo(isac, 0x20);
}
}
void isacsx_irq(struct isac *isac)
{
unsigned char val;
val = isac->read_isac(isac, ISACSX_ISTA);
DBG(DBG_IRQ, "ISTA %#x", val);
if (val & ISACSX_ISTA_ICD)
isacsx_icd_interrupt(isac);
if (val & ISACSX_ISTA_CIC)
isacsx_cic_interrupt(isac);
}
void isac_init(struct isac *isac)
{
isac->tx_skb = NULL;
isac->l1m.fsm = &l1fsm;
isac->l1m.state = ST_L1_RESET;
#ifdef CONFIG_HISAX_DEBUG
isac->l1m.debug = 1;
#else
isac->l1m.debug = 0;
#endif
isac->l1m.userdata = isac;
isac->l1m.printdebug = l1m_debug;
FsmInitTimer(&isac->l1m, &isac->timer);
}
void isac_setup(struct isac *isac)
{
int val, eval;
isac->type = TYPE_ISAC;
isac_version(isac);
ph_command(isac, ISAC_CMD_RES);
isac->write_isac(isac, ISAC_MASK, 0xff);
isac->mocr = 0xaa;
if (test_bit(ISAC_IOM1, &isac->flags)) {
/* IOM 1 Mode */
isac->write_isac(isac, ISAC_ADF2, 0x0);
isac->write_isac(isac, ISAC_SPCR, 0xa);
isac->write_isac(isac, ISAC_ADF1, 0x2);
isac->write_isac(isac, ISAC_STCR, 0x70);
isac->write_isac(isac, ISAC_MODE, 0xc9);
} else {
/* IOM 2 Mode */
if (!isac->adf2)
isac->adf2 = 0x80;
isac->write_isac(isac, ISAC_ADF2, isac->adf2);
isac->write_isac(isac, ISAC_SQXR, 0x2f);
isac->write_isac(isac, ISAC_SPCR, 0x00);
isac->write_isac(isac, ISAC_STCR, 0x70);
isac->write_isac(isac, ISAC_MODE, 0xc9);
isac->write_isac(isac, ISAC_TIMR, 0x00);
isac->write_isac(isac, ISAC_ADF1, 0x00);
}
val = isac->read_isac(isac, ISAC_STAR);
DBG(2, "ISAC STAR %x", val);
val = isac->read_isac(isac, ISAC_MODE);
DBG(2, "ISAC MODE %x", val);
val = isac->read_isac(isac, ISAC_ADF2);
DBG(2, "ISAC ADF2 %x", val);
val = isac->read_isac(isac, ISAC_ISTA);
DBG(2, "ISAC ISTA %x", val);
if (val & 0x01) {
eval = isac->read_isac(isac, ISAC_EXIR);
DBG(2, "ISAC EXIR %x", eval);
}
val = isac->read_isac(isac, ISAC_CIR0);
DBG(2, "ISAC CIR0 %x", val);
FsmEvent(&isac->l1m, (val >> 2) & 0xf, NULL);
isac->write_isac(isac, ISAC_MASK, 0x0);
// RESET Receiver and Transmitter
isac->write_isac(isac, ISAC_CMDR, ISAC_CMDR_XRES | ISAC_CMDR_RRES);
}
void isacsx_setup(struct isac *isac)
{
isac->type = TYPE_ISACSX;
// clear LDD
isac->write_isac(isac, ISACSX_TR_CONF0, 0x00);
// enable transmitter
isac->write_isac(isac, ISACSX_TR_CONF2, 0x00);
// transparent mode 0, RAC, stop/go
isac->write_isac(isac, ISACSX_MODED, 0xc9);
// all HDLC IRQ unmasked
isac->write_isac(isac, ISACSX_MASKD, 0x03);
// unmask ICD, CID IRQs
isac->write_isac(isac, ISACSX_MASK,
~(ISACSX_ISTA_ICD | ISACSX_ISTA_CIC));
}
void isac_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg)
{
struct isac *isac = hisax_d_if->priv;
struct sk_buff *skb = arg;
DBG(DBG_PR, "pr %#x", pr);
switch (pr) {
case PH_ACTIVATE | REQUEST:
FsmEvent(&isac->l1m, EV_PH_ACTIVATE_REQ, NULL);
break;
case PH_DEACTIVATE | REQUEST:
FsmEvent(&isac->l1m, EV_PH_DEACTIVATE_REQ, NULL);
break;
case PH_DATA | REQUEST:
DBG(DBG_PR, "PH_DATA REQUEST len %d", skb->len);
DBG_SKB(DBG_XPACKET, skb);
if (isac->l1m.state != ST_L1_F7) {
DBG(1, "L1 wrong state %d\n", isac->l1m.state);
dev_kfree_skb(skb);
break;
}
BUG_ON(isac->tx_skb);
isac->tx_skb = skb;
isac_fill_fifo(isac);
break;
}
}
static int __init hisax_isac_init(void)
{
printk(KERN_INFO "hisax_isac: ISAC-S/ISAC-SX ISDN driver v0.1.0\n");
l1fsm.state_count = L1_STATE_COUNT;
l1fsm.event_count = L1_EVENT_COUNT;
l1fsm.strState = strL1State;
l1fsm.strEvent = strL1Event;
return FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList));
}
static void __exit hisax_isac_exit(void)
{
FsmFree(&l1fsm);
}
EXPORT_SYMBOL(isac_init);
EXPORT_SYMBOL(isac_d_l2l1);
EXPORT_SYMBOL(isacsx_setup);
EXPORT_SYMBOL(isacsx_irq);
EXPORT_SYMBOL(isac_setup);
EXPORT_SYMBOL(isac_irq);
module_init(hisax_isac_init);
module_exit(hisax_isac_exit);
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