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linux/drivers/char/mwave/smapi.c
Colin Ian King 7ca78630a1 char/mwave: remove redundant initialization of variable bRC 
The variable bRC is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200611152708.927344-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-10 14:50:51 +02:00

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/*
*
* 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/kernel.h>
#include <linux/mc146818rtc.h> /* CMOS defines */
#include "smapi.h"
#include "mwavedd.h"
static unsigned short g_usSmapiPort = 0;
static 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;
unsigned short usAX, usBX, usCX, usDX, usDI, usSI;
static const unsigned short ausDspBases[] = {
0x0030, 0x4E30, 0x8E30, 0xCE30,
0x0130, 0x0350, 0x0070, 0x0DB0 };
static const unsigned short ausUartBases[] = {
0x03F8, 0x02F8, 0x03E8, 0x02E8 };
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) < ARRAY_SIZE(ausDspBases)) {
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) < ARRAY_SIZE(ausUartBases)) {
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;
static const unsigned short ausDspBases[] = {
0x0030, 0x4E30, 0x8E30, 0xCE30,
0x0130, 0x0350, 0x0070, 0x0DB0 };
static const unsigned short ausUartBases[] = {
0x03F8, 0x02F8, 0x03E8, 0x02E8 };
static const unsigned short ausDspIrqs[] = {
5, 7, 10, 11, 15 };
static const unsigned short ausUartIrqs[] = {
3, 4 };
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 < ARRAY_SIZE(ausDspBases); i++) {
if (mwave_3780i_io == ausDspBases[i])
break;
}
if (i == ARRAY_SIZE(ausDspBases)) {
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 < ARRAY_SIZE(ausDspIrqs); i++) {
if (mwave_3780i_irq == ausDspIrqs[i])
break;
}
if (i == ARRAY_SIZE(ausDspIrqs)) {
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 < ARRAY_SIZE(ausUartBases); i++) {
if (mwave_uart_io == ausUartBases[i])
break;
}
if (i == ARRAY_SIZE(ausUartBases)) {
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 < ARRAY_SIZE(ausUartIrqs); i++) {
if (mwave_uart_irq == ausUartIrqs[i])
break;
}
if (i == ARRAY_SIZE(ausUartIrqs)) {
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
"smapi::smapi_set_DSP_cfg: Serial port A irq %x conflicts with mwave_uart_irq %x\n", usSI & 0xFF, mwave_uart_irq);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: Serial port A irq %x conflicts with mwave_uart_irq %x\n", usSI & 0xFF, mwave_uart_irq);
#endif
#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
"smapi::smapi_set_DSP_cfg: Serial port A base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI >> 8], ausUartBases[uartio_index]);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: Serial port A base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI >> 8], ausUartBases[uartio_index]);
#endif
#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
PRINTK_1(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg Disabling conflicting serial port A\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
"smapi::smapi_set_DSP_cfg: Serial port B irq %x conflicts with mwave_uart_irq %x\n", usSI & 0xFF, mwave_uart_irq);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: Serial port B irq %x conflicts with mwave_uart_irq %x\n", usSI & 0xFF, mwave_uart_irq);
#endif
#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
PRINTK_1(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg Disabling conflicting serial port B\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
"smapi::smapi_set_DSP_cfg: Serial port B base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI >> 8], ausUartBases[uartio_index]);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: Serial port B base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI >> 8], ausUartBases[uartio_index]);
#endif
#ifdef MWAVE_FUTZ_WITH_OTHER_DEVICES
PRINTK_1 (TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg Disabling conflicting serial port B\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) != 0xff) { /* IR port not disabled */
if ((usCX & 0xff) == mwave_uart_irq) {
#ifndef MWAVE_FUTZ_WITH_OTHER_DEVICES
PRINTK_ERROR(KERN_ERR_MWAVE
"smapi::smapi_set_DSP_cfg: IR port irq %x conflicts with mwave_uart_irq %x\n", usCX & 0xff, mwave_uart_irq);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: IR port irq %x conflicts with mwave_uart_irq %x\n", usCX & 0xff, mwave_uart_irq);
#endif
#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
"smapi::smapi_set_DSP_cfg: IR port base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI & 0xff], ausUartBases[uartio_index]);
#else
PRINTK_3(TRACE_SMAPI,
"smapi::smapi_set_DSP_cfg: IR port base I/O address %x conflicts with mwave uart I/O %x\n", ausUartBases[usSI & 0xff], ausUartBases[uartio_index]);
#endif
#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(bool bOn)
{
int bRC;
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;
}
#if 0
static 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;
}
#endif /* 0 */
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;
}
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