linux-libre/drivers/isdn/hardware/eicon/s_bri.c

/*
 *
 Copyright (c) Eicon Networks, 2002.
 *
 This source file is supplied for the use with
 Eicon Networks range of DIVA Server Adapters.
 *
 Eicon File Revision :    2.1
 *
 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, or (at your option)
 any later version.
 *
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
 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.
 *
 */
#include "platform.h"
#include "di_defs.h"
#include "pc.h"
#include "pr_pc.h"
#include "di.h"
#include "mi_pc.h"
#include "pc_maint.h"
#include "divasync.h"
#include "io.h"
#include "helpers.h"
#include "dsrv_bri.h"
#include "dsp_defs.h"
/*****************************************************************************/
#define MAX_XLOG_SIZE (64 * 1024)
/* --------------------------------------------------------------------------
   Investigate card state, recovery trace buffer
   -------------------------------------------------------------------------- */
static void bri_cpu_trapped(PISDN_ADAPTER IoAdapter) {
	byte  __iomem *addrHi, *addrLo, *ioaddr;
	word *Xlog;
	dword   regs[4], i, size;
	Xdesc   xlogDesc;
	byte __iomem *Port;
/*
 * first read pointers and trap frame
 */
	if (!(Xlog = (word *)diva_os_malloc(0, MAX_XLOG_SIZE)))
		return;
	Port = DIVA_OS_MEM_ATTACH_PORT(IoAdapter);
	addrHi = Port + ((IoAdapter->Properties.Bus == BUS_PCI) ? M_PCI_ADDRH : ADDRH);
	addrLo = Port + ADDR;
	ioaddr = Port + DATA;
	outpp(addrHi,  0);
	outppw(addrLo, 0);
	for (i = 0; i < 0x100; Xlog[i++] = inppw(ioaddr));
/*
 * check for trapped MIPS 3xxx CPU, dump only exception frame
 */
	if (GET_DWORD(&Xlog[0x80 / sizeof(Xlog[0])]) == 0x99999999)
	{
		dump_trap_frame(IoAdapter, &((byte *)Xlog)[0x90]);
		IoAdapter->trapped = 1;
	}
	regs[0] = GET_DWORD(&((byte *)Xlog)[0x70]);
	regs[1] = GET_DWORD(&((byte *)Xlog)[0x74]);
	regs[2] = GET_DWORD(&((byte *)Xlog)[0x78]);
	regs[3] = GET_DWORD(&((byte *)Xlog)[0x7c]);
	outpp(addrHi, (regs[1] >> 16) & 0x7F);
	outppw(addrLo, regs[1] & 0xFFFF);
	xlogDesc.cnt = inppw(ioaddr);
	outpp(addrHi, (regs[2] >> 16) & 0x7F);
	outppw(addrLo, regs[2] & 0xFFFF);
	xlogDesc.out = inppw(ioaddr);
	xlogDesc.buf = Xlog;
	regs[0] &= IoAdapter->MemorySize - 1;
	if ((regs[0] < IoAdapter->MemorySize - 1))
	{
		size = IoAdapter->MemorySize - regs[0];
		if (size > MAX_XLOG_SIZE)
			size = MAX_XLOG_SIZE;
		for (i = 0; i < (size / sizeof(*Xlog)); regs[0] += 2)
		{
			outpp(addrHi, (regs[0] >> 16) & 0x7F);
			outppw(addrLo, regs[0] & 0xFFFF);
			Xlog[i++] = inppw(ioaddr);
		}
		dump_xlog_buffer(IoAdapter, &xlogDesc);
		diva_os_free(0, Xlog);
		IoAdapter->trapped = 2;
	}
	outpp(addrHi, (byte)((BRI_UNCACHED_ADDR(IoAdapter->MemoryBase + IoAdapter->MemorySize -
						BRI_SHARED_RAM_SIZE)) >> 16));
	outppw(addrLo, 0x00);
	DIVA_OS_MEM_DETACH_PORT(IoAdapter, Port);
}
/* ---------------------------------------------------------------------
   Reset hardware
   --------------------------------------------------------------------- */
static void reset_bri_hardware(PISDN_ADAPTER IoAdapter) {
	byte __iomem *p = DIVA_OS_MEM_ATTACH_CTLREG(IoAdapter);
	outpp(p, 0x00);
	DIVA_OS_MEM_DETACH_CTLREG(IoAdapter, p);
}
/* ---------------------------------------------------------------------
   Halt system
   --------------------------------------------------------------------- */
static void stop_bri_hardware(PISDN_ADAPTER IoAdapter) {
	byte __iomem *p = DIVA_OS_MEM_ATTACH_RESET(IoAdapter);
	if (p) {
		outpp(p, 0x00); /* disable interrupts ! */
	}
	DIVA_OS_MEM_DETACH_RESET(IoAdapter, p);
	p = DIVA_OS_MEM_ATTACH_CTLREG(IoAdapter);
	outpp(p, 0x00);    /* clear int, halt cpu */
	DIVA_OS_MEM_DETACH_CTLREG(IoAdapter, p);
}
static int load_bri_hardware(PISDN_ADAPTER IoAdapter) {
	return (0);
}
/******************************************************************************/
static int bri_ISR(struct _ISDN_ADAPTER *IoAdapter) {
	byte __iomem *p;

	p = DIVA_OS_MEM_ATTACH_CTLREG(IoAdapter);
	if (!(inpp(p) & 0x01)) {
		DIVA_OS_MEM_DETACH_CTLREG(IoAdapter, p);
		return (0);
	}
	/*
	  clear interrupt line
	*/
	outpp(p, 0x08);
	DIVA_OS_MEM_DETACH_CTLREG(IoAdapter, p);
	IoAdapter->IrqCount++;
	if (IoAdapter->Initialized) {
		diva_os_schedule_soft_isr(&IoAdapter->isr_soft_isr);
	}
	return (1);
}
/* --------------------------------------------------------------------------
   Disable IRQ in the card hardware
   -------------------------------------------------------------------------- */
static void disable_bri_interrupt(PISDN_ADAPTER IoAdapter) {
	byte __iomem *p;
	p = DIVA_OS_MEM_ATTACH_RESET(IoAdapter);
	if (p)
	{
		outpp(p, 0x00); /* disable interrupts ! */
	}
	DIVA_OS_MEM_DETACH_RESET(IoAdapter, p);
	p = DIVA_OS_MEM_ATTACH_CTLREG(IoAdapter);
	outpp(p, 0x00); /* clear int, halt cpu */
	DIVA_OS_MEM_DETACH_CTLREG(IoAdapter, p);
}
/* -------------------------------------------------------------------------
   Fill card entry points
   ------------------------------------------------------------------------- */
void prepare_maestra_functions(PISDN_ADAPTER IoAdapter) {
	ADAPTER *a = &IoAdapter->a;
	a->ram_in             = io_in;
	a->ram_inw            = io_inw;
	a->ram_in_buffer      = io_in_buffer;
	a->ram_look_ahead     = io_look_ahead;
	a->ram_out            = io_out;
	a->ram_outw           = io_outw;
	a->ram_out_buffer     = io_out_buffer;
	a->ram_inc            = io_inc;
	IoAdapter->MemoryBase = BRI_MEMORY_BASE;
	IoAdapter->MemorySize = BRI_MEMORY_SIZE;
	IoAdapter->out        = pr_out;
	IoAdapter->dpc        = pr_dpc;
	IoAdapter->tst_irq    = scom_test_int;
	IoAdapter->clr_irq    = scom_clear_int;
	IoAdapter->pcm        = (struct pc_maint *)MIPS_MAINT_OFFS;
	IoAdapter->load       = load_bri_hardware;
	IoAdapter->disIrq     = disable_bri_interrupt;
	IoAdapter->rstFnc     = reset_bri_hardware;
	IoAdapter->stop       = stop_bri_hardware;
	IoAdapter->trapFnc    = bri_cpu_trapped;
	IoAdapter->diva_isr_handler = bri_ISR;
	/*
	  Prepare OS dependent functions
	*/
	diva_os_prepare_maestra_functions(IoAdapter);
}
/* -------------------------------------------------------------------------- */