patch-2.4.11-dontuse linux/drivers/char/mwave/smapi.c

• Lines: 564
• Date: Sun Sep 30 12:26:05 2001
• Orig file: v2.4.10/linux/drivers/char/mwave/smapi.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.10/linux/drivers/char/mwave/smapi.c linux/drivers/char/mwave/smapi.c
@@ -0,0 +1,563 @@
+/*
+*
+* smapi.c -- SMAPI interface routines
+*
+*
+* Written By: Mike Sullivan IBM Corporation
+*
+* Copyright (C) 1999 IBM Corporation
+*
+* 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.
+*
+* NO WARRANTY
+* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+* solely responsible for determining the appropriateness of using and
+* distributing the Program and assumes all risks associated with its
+* exercise of rights under this Agreement, including but not limited to
+* the risks and costs of program errors, damage to or loss of data,
+* programs or equipment, and unavailability or interruption of operations.
+*
+* DISCLAIMER OF LIABILITY
+* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
+* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+*
+* 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*
+*
+* 10/23/2000 - Alpha Release
+*	First release to the public
+*/
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/mc146818rtc.h>	/* CMOS defines */
+#include "smapi.h"
+#include "mwavedd.h"
+
+static unsigned short g_usSmapiPort = 0;
+
+
+int smapi_request(unsigned short inBX, unsigned short inCX,
+                  unsigned short inDI, unsigned short inSI,
+                  unsigned short *outAX, unsigned short *outBX,
+                  unsigned short *outCX, unsigned short *outDX,
+                  unsigned short *outDI, unsigned short *outSI)
+{
+	unsigned short myoutAX = 2, *pmyoutAX = &myoutAX;
+	unsigned short myoutBX = 3, *pmyoutBX = &myoutBX;
+	unsigned short myoutCX = 4, *pmyoutCX = &myoutCX;
+	unsigned short myoutDX = 5, *pmyoutDX = &myoutDX;
+	unsigned short myoutDI = 6, *pmyoutDI = &myoutDI;
+	unsigned short myoutSI = 7, *pmyoutSI = &myoutSI;
+	unsigned short usSmapiOK = -EIO, *pusSmapiOK = &usSmapiOK;
+	unsigned int inBXCX = (inBX << 16) | inCX;
+	unsigned int inDISI = (inDI << 16) | inSI;
+	int retval = 0;
+
+	PRINTK_5(TRACE_SMAPI, "inBX %x inCX %x inDI %x inSI %x\n",
+		inBX, inCX, inDI, inSI);
+
+	__asm__ __volatile__("movw  $0x5380,%%ax\n\t"
+			    "movl  %7,%%ebx\n\t"
+			    "shrl  $16, %%ebx\n\t"
+			    "movw  %7,%%cx\n\t"
+			    "movl  %8,%%edi\n\t"
+			    "shrl  $16,%%edi\n\t"
+			    "movw  %8,%%si\n\t"
+			    "movw  %9,%%dx\n\t"
+			    "out   %%al,%%dx\n\t"
+			    "out   %%al,$0x4F\n\t"
+			    "cmpb  $0x53,%%ah\n\t"
+			    "je    2f\n\t"
+			    "1:\n\t"
+			    "orb   %%ah,%%ah\n\t"
+			    "jnz   2f\n\t"
+			    "movw  %%ax,%0\n\t"
+			    "movw  %%bx,%1\n\t"
+			    "movw  %%cx,%2\n\t"
+			    "movw  %%dx,%3\n\t"
+			    "movw  %%di,%4\n\t"
+			    "movw  %%si,%5\n\t"
+			    "movw  $1,%6\n\t"
+			    "2:\n\t":"=m"(*(unsigned short *) pmyoutAX),
+			    "=m"(*(unsigned short *) pmyoutBX),
+			    "=m"(*(unsigned short *) pmyoutCX),
+			    "=m"(*(unsigned short *) pmyoutDX),
+			    "=m"(*(unsigned short *) pmyoutDI),
+			    "=m"(*(unsigned short *) pmyoutSI),
+			    "=m"(*(unsigned short *) pusSmapiOK)
+			    :"m"(inBXCX), "m"(inDISI), "m"(g_usSmapiPort)
+			    :"%eax", "%ebx", "%ecx", "%edx", "%edi",
+			    "%esi");
+
+	PRINTK_8(TRACE_SMAPI,
+		"myoutAX %x myoutBX %x myoutCX %x myoutDX %x myoutDI %x myoutSI %x usSmapiOK %x\n",
+		myoutAX, myoutBX, myoutCX, myoutDX, myoutDI, myoutSI,
+		usSmapiOK);
+	*outAX = myoutAX;
+	*outBX = myoutBX;
+	*outCX = myoutCX;
+	*outDX = myoutDX;
+	*outDI = myoutDI;
+	*outSI = myoutSI;
+
+	retval = (usSmapiOK == 1) ? 0 : -EIO;
+	PRINTK_2(TRACE_SMAPI, "smapi::smapi_request exit retval %x\n", retval);
+	return retval;
+}
+
+
+int smapi_query_DSP_cfg(SMAPI_DSP_SETTINGS * pSettings)
+{
+	int bRC = -EIO;
+	unsigned short usAX, usBX, usCX, usDX, usDI, usSI;
+	unsigned short ausDspBases[] = { 0x0030, 0x4E30, 0x8E30, 0xCE30, 0x0130, 0x0350, 0x0070, 0x0DB0 };
+	unsigned short ausUartBases[] = { 0x03F8, 0x02F8, 0x03E8, 0x02E8 };
+	unsigned short numDspBases = 8;
+	unsigned short numUartBases = 4;
+
+	PRINTK_1(TRACE_SMAPI, "smapi::smapi_query_DSP_cfg entry\n");
+
+	bRC = smapi_request(0x1802, 0x0000, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) {
+		PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_query_DSP_cfg: Error: Could not get DSP Settings. Aborting.\n");
+		return bRC;
+	}
+
+	PRINTK_1(TRACE_SMAPI, "smapi::smapi_query_DSP_cfg, smapi_request OK\n");
+
+	pSettings->bDSPPresent = ((usBX & 0x0100) != 0);
+	pSettings->bDSPEnabled = ((usCX & 0x0001) != 0);
+	pSettings->usDspIRQ = usSI & 0x00FF;
+	pSettings->usDspDMA = (usSI & 0xFF00) >> 8;
+	if ((usDI & 0x00FF) < numDspBases) {
+		pSettings->usDspBaseIO = ausDspBases[usDI & 0x00FF];
+	} else {
+		pSettings->usDspBaseIO = 0;
+	}
+	PRINTK_6(TRACE_SMAPI,
+		"smapi::smapi_query_DSP_cfg get DSP Settings bDSPPresent %x bDSPEnabled %x usDspIRQ %x usDspDMA %x usDspBaseIO %x\n",
+		pSettings->bDSPPresent, pSettings->bDSPEnabled,
+		pSettings->usDspIRQ, pSettings->usDspDMA,
+		pSettings->usDspBaseIO);
+
+	/* check for illegal values */
+	if ( pSettings->usDspBaseIO == 0 ) 
+		PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_query_DSP_cfg: Worry: DSP base I/O address is 0\n");
+	if ( pSettings->usDspIRQ == 0 )
+		PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_query_DSP_cfg: Worry: DSP IRQ line is 0\n");
+
+	bRC = smapi_request(0x1804, 0x0000, 0, 0,
+	   	&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) {
+		PRINTK_ERROR("smapi::smapi_query_DSP_cfg: Error: Could not get DSP modem settings. Aborting.\n");
+		return bRC;
+	} 
+
+	PRINTK_1(TRACE_SMAPI, "smapi::smapi_query_DSP_cfg, smapi_request OK\n");
+
+	pSettings->bModemEnabled = ((usCX & 0x0001) != 0);
+	pSettings->usUartIRQ = usSI & 0x000F;
+	if (((usSI & 0xFF00) >> 8) < numUartBases) {
+		pSettings->usUartBaseIO = ausUartBases[(usSI & 0xFF00) >> 8];
+	} else {
+		pSettings->usUartBaseIO = 0;
+	}
+
+	PRINTK_4(TRACE_SMAPI,
+		"smapi::smapi_query_DSP_cfg get DSP modem settings bModemEnabled %x usUartIRQ %x usUartBaseIO %x\n",
+		pSettings->bModemEnabled,
+		pSettings->usUartIRQ,
+		pSettings->usUartBaseIO);
+
+	/* check for illegal values */
+	if ( pSettings->usUartBaseIO == 0 ) 
+		PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_query_DSP_cfg: Worry: UART base I/O address is 0\n");
+	if ( pSettings->usUartIRQ == 0 )
+		PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_query_DSP_cfg: Worry: UART IRQ line is 0\n");
+
+	PRINTK_2(TRACE_SMAPI, "smapi::smapi_query_DSP_cfg exit bRC %x\n", bRC);
+
+	return bRC;
+}
+
+
+int smapi_set_DSP_cfg(void)
+{
+	int bRC = -EIO;
+	int i;
+	unsigned short usAX, usBX, usCX, usDX, usDI, usSI;
+	unsigned short ausDspBases[] = { 0x0030, 0x4E30, 0x8E30, 0xCE30, 0x0130, 0x0350, 0x0070, 0x0DB0 };
+	unsigned short ausUartBases[] = { 0x03F8, 0x02F8, 0x03E8, 0x02E8 };
+	unsigned short ausDspIrqs[] = { 5, 7, 10, 11, 15 };
+	unsigned short ausUartIrqs[] = { 3, 4 };
+
+	unsigned short numDspBases = 8;
+	unsigned short numUartBases = 4;
+	unsigned short numDspIrqs = 5;
+	unsigned short numUartIrqs = 2;
+	unsigned short dspio_index = 0, uartio_index = 0;
+
+	PRINTK_5(TRACE_SMAPI,
+		"smapi::smapi_set_DSP_cfg entry mwave_3780i_irq %x mwave_3780i_io %x mwave_uart_irq %x mwave_uart_io %x\n",
+		mwave_3780i_irq, mwave_3780i_io, mwave_uart_irq, mwave_uart_io);
+
+	if (mwave_3780i_io) {
+		for (i = 0; i < numDspBases; i++) {
+			if (mwave_3780i_io == ausDspBases[i])
+				break;
+		}
+		if (i == numDspBases) {
+			PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_set_DSP_cfg: Error: Invalid mwave_3780i_io address %x. Aborting.\n", mwave_3780i_io);
+			return bRC;
+		}
+		dspio_index = i;
+	}
+
+	if (mwave_3780i_irq) {
+		for (i = 0; i < numDspIrqs; i++) {
+			if (mwave_3780i_irq == ausDspIrqs[i])
+				break;
+		}
+		if (i == numDspIrqs) {
+			PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_set_DSP_cfg: Error: Invalid mwave_3780i_irq %x. Aborting.\n", mwave_3780i_irq);
+			return bRC;
+		}
+	}
+
+	if (mwave_uart_io) {
+		for (i = 0; i < numUartBases; i++) {
+			if (mwave_uart_io == ausUartBases[i])
+				break;
+		}
+		if (i == numUartBases) {
+			PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_set_DSP_cfg: Error: Invalid mwave_uart_io address %x. Aborting.\n", mwave_uart_io);
+			return bRC;
+		}
+		uartio_index = i;
+	}
+
+
+	if (mwave_uart_irq) {
+		for (i = 0; i < numUartIrqs; i++) {
+			if (mwave_uart_irq == ausUartIrqs[i])
+				break;
+		}
+		if (i == numUartIrqs) {
+			PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_set_DSP_cfg: Error: Invalid mwave_uart_irq %x. Aborting.\n", mwave_uart_irq);
+			return bRC;
+		}
+	}
+
+	if (mwave_uart_irq || mwave_uart_io) {
+
+		/* Check serial port A */
+		bRC = smapi_request(0x1402, 0x0000, 0, 0,
+			&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+		if (bRC) goto exit_smapi_request_error;
+		/* bRC == 0 */
+		if (usBX & 0x0100) {	/* serial port A is present */
+			if (usCX & 1) {	/* serial port is enabled */
+				if ((usSI & 0xFF) == mwave_uart_irq) {
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+					PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+					PRINTK_3(TRACE_SMAPI,
+#endif
+						"smapi::smapi_set_DSP_cfg: Serial port A irq %x conflicts with mwave_uart_irq %x\n", usSI, mwave_uart_irq);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+					PRINTK_1(TRACE_SMAPI,
+						"smapi::smapi_set_DSP_cfg Disabling conflicting serial port\n");
+					bRC = smapi_request(0x1403, 0x0100, 0, usSI,
+						&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+					if (bRC) goto exit_smapi_request_error;
+					bRC = smapi_request(0x1402, 0x0000, 0, 0,
+						&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+					if (bRC) goto exit_smapi_request_error;
+#else
+					goto exit_conflict;
+#endif
+				} else {
+					if ((usSI >> 8) == uartio_index) {
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+						PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+						PRINTK_3(TRACE_SMAPI,
+#endif
+							"smapi::smapi_set_DSP_cfg: Serial port A base I/O address index %x conflicts with uartio_index %x\n", usSI >> 8, uartio_index);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+						PRINTK_1(TRACE_SMAPI,
+							"smapi::smapi_set_DSP_cfg Disabling conflicting serial port\n");
+						bRC = smapi_request (0x1403, 0x0100, 0, usSI,
+							&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+						if (bRC) goto exit_smapi_request_error;
+						bRC = smapi_request (0x1402, 0x0000, 0, 0,
+							&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+						if (bRC) goto exit_smapi_request_error;
+#else
+						goto exit_conflict;
+#endif
+					}
+				}
+			}
+		}
+
+		/* Check serial port B */
+		bRC = smapi_request(0x1404, 0x0000, 0, 0,
+			&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+		if (bRC) goto exit_smapi_request_error;
+		/* bRC == 0 */
+		if (usBX & 0x0100) {	/* serial port B is present */
+			if (usCX & 1) {	/* serial port is enabled */
+				if ((usSI & 0xFF) == mwave_uart_irq) {
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+					PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+					PRINTK_3(TRACE_SMAPI,
+#endif
+						"smapi::smapi_set_DSP_cfg: Serial port B irq %x conflicts with mwave_uart_irq %x\n", usSI, mwave_uart_irq);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+					PRINTK_1(TRACE_SMAPI,
+						"smapi::smapi_set_DSP_cfg Disabling conflicting serial port\n");
+					bRC = smapi_request(0x1405, 0x0100, 0, usSI,
+						&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+					if (bRC) goto exit_smapi_request_error;
+					bRC = smapi_request(0x1404, 0x0000, 0, 0,
+						&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+					if (bRC) goto exit_smapi_request_error;
+#else
+					goto exit_conflict;
+#endif
+				} else {
+					if ((usSI >> 8) == uartio_index) {
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+						PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+						PRINTK_3(TRACE_SMAPI,
+#endif
+							"smapi::smapi_set_DSP_cfg: Serial port B base I/O address index %x conflicts with uartio_index %x\n", usSI >> 8, uartio_index);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+						PRINTK_1 (TRACE_SMAPI,
+						    "smapi::smapi_set_DSP_cfg Disabling conflicting serial port\n");
+						bRC = smapi_request (0x1405, 0x0100, 0, usSI,
+							&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+						if (bRC) goto exit_smapi_request_error;
+						bRC = smapi_request (0x1404, 0x0000, 0, 0,
+							&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+						if (bRC) goto exit_smapi_request_error;
+#else
+						goto exit_conflict;
+#endif
+					}
+				}
+			}
+		}
+
+		/* Check IR port */
+		bRC = smapi_request(0x1700, 0x0000, 0, 0,
+			&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+		if (bRC) goto exit_smapi_request_error;
+		bRC = smapi_request(0x1704, 0x0000, 0, 0,
+			&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+		if (bRC) goto exit_smapi_request_error;
+		/* bRC == 0 */
+		if ((usCX & 0xff) == mwave_uart_irq) {	/* serial port is enabled */
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+			PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+			PRINTK_3(TRACE_SMAPI,
+#endif
+				"smapi::smapi_set_DSP_cfg: IR port irq %x conflicts with mwave_uart_irq %x\n", usSI, mwave_uart_irq);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+			PRINTK_1(TRACE_SMAPI,
+				"smapi::smapi_set_DSP_cfg Disabling conflicting IR port\n");
+			bRC = smapi_request(0x1701, 0x0100, 0, 0,
+				&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+			if (bRC) goto exit_smapi_request_error;
+			bRC = smapi_request(0x1700, 0, 0, 0,
+				&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+			if (bRC) goto exit_smapi_request_error;
+			bRC = smapi_request(0x1705, 0x01ff, 0, usSI,
+				&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+			if (bRC) goto exit_smapi_request_error;
+			bRC = smapi_request(0x1704, 0x0000, 0, 0,
+				&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+			if (bRC) goto exit_smapi_request_error;
+#else
+			goto exit_conflict;
+#endif
+		} else {
+			if ((usSI & 0xff) == uartio_index) {
+#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
+				PRINTK_ERROR(KERN_ERR_MWAVE
+#else
+				PRINTK_3(TRACE_SMAPI,
+#endif
+					"smapi::smapi_set_DSP_cfg: IR port base I/O address index %x conflicts with uartio_index %x\n", usSI & 0xff, uartio_index);
+#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
+				PRINTK_1(TRACE_SMAPI,
+					"smapi::smapi_set_DSP_cfg Disabling conflicting IR port\n");
+				bRC = smapi_request(0x1701, 0x0100, 0, 0,
+					&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+				if (bRC) goto exit_smapi_request_error;
+				bRC = smapi_request(0x1700, 0, 0, 0,
+					&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+				if (bRC) goto exit_smapi_request_error;
+				bRC = smapi_request(0x1705, 0x01ff, 0, usSI,
+					&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+				if (bRC) goto exit_smapi_request_error;
+				bRC = smapi_request(0x1704, 0x0000, 0, 0,
+					&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+				if (bRC) goto exit_smapi_request_error;
+#else
+				goto exit_conflict;
+#endif
+			}
+		}
+	}
+
+	bRC = smapi_request(0x1802, 0x0000, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+	if (mwave_3780i_io) {
+		usDI = dspio_index;;
+	}
+	if (mwave_3780i_irq) {
+		usSI = (usSI & 0xff00) | mwave_3780i_irq;
+	}
+
+	bRC = smapi_request(0x1803, 0x0101, usDI, usSI,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+	bRC = smapi_request(0x1804, 0x0000, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+	if (mwave_uart_io) {
+		usSI = (usSI & 0x00ff) | (uartio_index << 8);
+	}
+	if (mwave_uart_irq) {
+		usSI = (usSI & 0xff00) | mwave_uart_irq;
+	}
+	bRC = smapi_request(0x1805, 0x0101, 0, usSI,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+	bRC = smapi_request(0x1802, 0x0000, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+	bRC = smapi_request(0x1804, 0x0000, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+	if (bRC) goto exit_smapi_request_error;
+
+/* normal exit: */
+	PRINTK_1(TRACE_SMAPI, "smapi::smapi_set_DSP_cfg exit\n");
+	return 0;
+
+exit_conflict:
+	/* Message has already been printed */
+	return -EIO;
+
+exit_smapi_request_error:
+	PRINTK_ERROR(KERN_ERR_MWAVE "smapi::smapi_set_DSP_cfg exit on smapi_request error bRC %x\n", bRC);
+	return bRC;
+}
+
+
+int smapi_set_DSP_power_state(BOOLEAN bOn)
+{
+	int bRC = -EIO;
+	unsigned short usAX, usBX, usCX, usDX, usDI, usSI;
+	unsigned short usPowerFunction;
+
+	PRINTK_2(TRACE_SMAPI, "smapi::smapi_set_DSP_power_state entry bOn %x\n", bOn);
+
+	usPowerFunction = (bOn) ? 1 : 0;
+
+	bRC = smapi_request(0x4901, 0x0000, 0, usPowerFunction,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+
+	PRINTK_2(TRACE_SMAPI, "smapi::smapi_set_DSP_power_state exit bRC %x\n", bRC);
+
+	return bRC;
+}
+
+
+int SmapiQuerySystemID(void)
+{
+	int bRC = -EIO;
+	unsigned short usAX = 0xffff, usBX = 0xffff, usCX = 0xffff,
+		usDX = 0xffff, usDI = 0xffff, usSI = 0xffff;
+
+	printk("smapi::SmapiQUerySystemID entry\n");
+	bRC = smapi_request(0x0000, 0, 0, 0,
+		&usAX, &usBX, &usCX, &usDX, &usDI, &usSI);
+
+	if (bRC == 0) {
+		printk("AX=%x, BX=%x, CX=%x, DX=%x, DI=%x, SI=%x\n",
+			usAX, usBX, usCX, usDX, usDI, usSI);
+	} else {
+		printk("smapi::SmapiQuerySystemID smapi_request error\n");
+	}
+
+	return bRC;
+}
+
+
+int smapi_init(void)
+{
+	int retval = -EIO;
+	unsigned short usSmapiID = 0;
+	unsigned long flags;
+
+	PRINTK_1(TRACE_SMAPI, "smapi::smapi_init entry\n");
+
+	spin_lock_irqsave(&rtc_lock, flags);
+	usSmapiID = CMOS_READ(0x7C);
+	usSmapiID |= (CMOS_READ(0x7D) << 8);
+	spin_unlock_irqrestore(&rtc_lock, flags);
+	PRINTK_2(TRACE_SMAPI, "smapi::smapi_init usSmapiID %x\n", usSmapiID);
+
+	if (usSmapiID == 0x5349) {
+		spin_lock_irqsave(&rtc_lock, flags);
+		g_usSmapiPort = CMOS_READ(0x7E);
+		g_usSmapiPort |= (CMOS_READ(0x7F) << 8);
+		spin_unlock_irqrestore(&rtc_lock, flags);
+		if (g_usSmapiPort == 0) {
+			PRINTK_ERROR("smapi::smapi_init, ERROR unable to read from SMAPI port\n");
+		} else {
+			PRINTK_2(TRACE_SMAPI,
+				"smapi::smapi_init, exit TRUE g_usSmapiPort %x\n",
+				g_usSmapiPort);
+			retval = 0;
+			//SmapiQuerySystemID();
+		}
+	} else {
+		PRINTK_ERROR("smapi::smapi_init, ERROR invalid usSmapiID\n");
+		retval = -ENXIO;
+	}
+
+	return retval;
+}