Quelle  tp3780i.c   Sprache: C

/*
*
* tp3780i.c -- board driver for 3780i on ThinkPads
*
*
* 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/interrupt.h>
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include "smapi.h"
#include "mwavedd.h"
#include "tp3780i.h"
#include "3780i.h"
#include "mwavepub.h"

static unsigned short s_ausThinkpadIrqToField[16] =
 { 0xFFFF, 0xFFFF, 0xFFFF, 0x0001, 0x0002, 0x0003, 0xFFFF, 0x0004,
 0xFFFF, 0xFFFF, 0x0005, 0x0006, 0xFFFF, 0xFFFF, 0xFFFF, 0x0007 };
static unsigned short s_ausThinkpadDmaToField[8] =
 { 0x0001, 0x0002, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0x0003, 0x0004 };
static unsigned short s_numIrqs = 16, s_numDmas = 8;


static void EnableSRAM(THINKPAD_BD_DATA * pBDData)
{
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;
 unsigned short usDspBaseIO = pSettings->usDspBaseIO;
 DSP_GPIO_OUTPUT_DATA_15_8 rGpioOutputData;
 DSP_GPIO_DRIVER_ENABLE_15_8 rGpioDriverEnable;
 DSP_GPIO_MODE_15_8 rGpioMode;

 PRINTK_1(TRACE_TP3780I, "tp3780i::EnableSRAM, entry\n");

 MKWORD(rGpioMode) = ReadMsaCfg(DSP_GpioModeControl_15_8);
 rGpioMode.GpioMode10 = 0;
 WriteMsaCfg(DSP_GpioModeControl_15_8, MKWORD(rGpioMode));

 MKWORD(rGpioDriverEnable) = 0;
 rGpioDriverEnable.Enable10 = true;
 rGpioDriverEnable.Mask10 = true;
 WriteMsaCfg(DSP_GpioDriverEnable_15_8, MKWORD(rGpioDriverEnable));

 MKWORD(rGpioOutputData) = 0;
 rGpioOutputData.Latch10 = 0;
 rGpioOutputData.Mask10 = true;
 WriteMsaCfg(DSP_GpioOutputData_15_8, MKWORD(rGpioOutputData));

 PRINTK_1(TRACE_TP3780I, "tp3780i::EnableSRAM exit\n");
}


static irqreturn_t UartInterrupt(int irq, void *dev_id)
{
 PRINTK_3(TRACE_TP3780I,
  "tp3780i::UartInterrupt entry irq %x dev_id %p\n", irq, dev_id);
 return IRQ_HANDLED;
}

static irqreturn_t DspInterrupt(int irq, void *dev_id)
{
 pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pDrvData->rBDData.rDspSettings;
 unsigned short usDspBaseIO = pSettings->usDspBaseIO;
 unsigned short usIPCSource = 0, usIsolationMask, usPCNum;

 PRINTK_3(TRACE_TP3780I,
  "tp3780i::DspInterrupt entry irq %x dev_id %p\n", irq, dev_id);

 if (dsp3780I_GetIPCSource(usDspBaseIO, &usIPCSource) == 0) {
  PRINTK_2(TRACE_TP3780I,
   "tp3780i::DspInterrupt, return from dsp3780i_GetIPCSource, usIPCSource %x\n",
   usIPCSource);
  usIsolationMask = 1;
  for (usPCNum = 1; usPCNum <= 16; usPCNum++) {
   if (usIPCSource & usIsolationMask) {
    usIPCSource &= ~usIsolationMask;
    PRINTK_3(TRACE_TP3780I,
     "tp3780i::DspInterrupt usPCNum %x usIPCSource %x\n",
     usPCNum, usIPCSource);
    if (pDrvData->IPCs[usPCNum - 1].usIntCount == 0) {
     pDrvData->IPCs[usPCNum - 1].usIntCount = 1;
    }
    PRINTK_2(TRACE_TP3780I,
     "tp3780i::DspInterrupt usIntCount %x\n",
     pDrvData->IPCs[usPCNum - 1].usIntCount);
    if (pDrvData->IPCs[usPCNum - 1].bIsEnabled == true) {
     PRINTK_2(TRACE_TP3780I,
      "tp3780i::DspInterrupt, waking up usPCNum %x\n",
      usPCNum - 1);
     wake_up_interruptible(&pDrvData->IPCs[usPCNum - 1].ipc_wait_queue);
    } else {
     PRINTK_2(TRACE_TP3780I,
      "tp3780i::DspInterrupt, no one waiting for IPC %x\n",
      usPCNum - 1);
    }
   }
   if (usIPCSource == 0)
    break;
   /* try next IPC */
   usIsolationMask = usIsolationMask << 1;
  }
 } else {
  PRINTK_1(TRACE_TP3780I,
   "tp3780i::DspInterrupt, return false from dsp3780i_GetIPCSource\n");
 }
 PRINTK_1(TRACE_TP3780I, "tp3780i::DspInterrupt exit\n");
 return IRQ_HANDLED;
}


int tp3780I_InitializeBoardData(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;


 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_InitializeBoardData entry pBDData %p\n", pBDData);

 pBDData->bDSPEnabled = false;
 pSettings->bInterruptClaimed = false;

 retval = smapi_init();
 if (retval) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_InitializeBoardData: Error: SMAPI is not available on this machine\n");
 } else {
  if (mwave_3780i_irq || mwave_3780i_io || mwave_uart_irq || mwave_uart_io) {
   retval = smapi_set_DSP_cfg();
  }
 }

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_InitializeBoardData exit retval %x\n", retval);

 return retval;
}

void tp3780I_Cleanup(THINKPAD_BD_DATA *pBDData)
{
 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_Cleanup entry and exit pBDData %p\n", pBDData);
}

int tp3780I_CalcResources(THINKPAD_BD_DATA * pBDData)
{
 SMAPI_DSP_SETTINGS rSmapiInfo;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;

 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_CalcResources entry pBDData %p\n", pBDData);

 if (smapi_query_DSP_cfg(&rSmapiInfo)) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_CalcResources: Error: Could not query DSP config. Aborting.\n");
  return -EIO;
 }

 /* Sanity check */
 if (
  ( rSmapiInfo.usDspIRQ == 0 )
  || ( rSmapiInfo.usDspBaseIO ==  0 )
  || ( rSmapiInfo.usUartIRQ ==  0 )
  || ( rSmapiInfo.usUartBaseIO ==  0 )
 ) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_CalcResources: Error: Illegal resource setting. Aborting.\n");
  return -EIO;
 }

 pSettings->bDSPEnabled = (rSmapiInfo.bDSPEnabled && rSmapiInfo.bDSPPresent);
 pSettings->bModemEnabled = rSmapiInfo.bModemEnabled;
 pSettings->usDspIrq = rSmapiInfo.usDspIRQ;
 pSettings->usDspDma = rSmapiInfo.usDspDMA;
 pSettings->usDspBaseIO = rSmapiInfo.usDspBaseIO;
 pSettings->usUartIrq = rSmapiInfo.usUartIRQ;
 pSettings->usUartBaseIO = rSmapiInfo.usUartBaseIO;

 pSettings->uDStoreSize = TP_ABILITIES_DATA_SIZE;
 pSettings->uIStoreSize = TP_ABILITIES_INST_SIZE;
 pSettings->uIps = TP_ABILITIES_INTS_PER_SEC;

 if (pSettings->bDSPEnabled && pSettings->bModemEnabled && pSettings->usDspIrq == pSettings->usUartIrq) {
  pBDData->bShareDspIrq = pBDData->bShareUartIrq = 1;
 } else {
  pBDData->bShareDspIrq = pBDData->bShareUartIrq = 0;
 }

 PRINTK_1(TRACE_TP3780I, "tp3780i::tp3780I_CalcResources exit\n");

 return 0;
}


int tp3780I_ClaimResources(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;
 struct resource *pres;

 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_ClaimResources entry pBDData %p\n", pBDData);

 pres = request_region(pSettings->usDspBaseIO, 16, "mwave_3780i");
 if ( pres == NULL ) retval = -EIO;

 if (retval) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_ClaimResources: Error: Could not claim I/O region starting at %x\n", pSettings->usDspBaseIO);
  retval = -EIO;
 }

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_ClaimResources exit retval %x\n", retval);

 return retval;
}

int tp3780I_ReleaseResources(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;

 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_ReleaseResources entry pBDData %p\n", pBDData);

 release_region(pSettings->usDspBaseIO & (~3), 16);

 if (pSettings->bInterruptClaimed) {
  free_irq(pSettings->usDspIrq, NULL);
  pSettings->bInterruptClaimed = false;
 }

 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_ReleaseResources exit retval %x\n", retval);

 return retval;
}



int tp3780I_EnableDSP(THINKPAD_BD_DATA * pBDData)
{
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;
 bool bDSPPoweredUp = false, bInterruptAllocated = false;

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_EnableDSP entry pBDData %p\n", pBDData);

 if (pBDData->bDSPEnabled) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: DSP already enabled!\n");
  goto exit_cleanup;
 }

 if (!pSettings->bDSPEnabled) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780::tp3780I_EnableDSP: Error: pSettings->bDSPEnabled not set\n");
  goto exit_cleanup;
 }

 if (
  (pSettings->usDspIrq >= s_numIrqs)
  || (pSettings->usDspDma >= s_numDmas)
  || (s_ausThinkpadIrqToField[pSettings->usDspIrq] == 0xFFFF)
  || (s_ausThinkpadDmaToField[pSettings->usDspDma] == 0xFFFF)
 ) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: invalid irq %x\n", pSettings->usDspIrq);
  goto exit_cleanup;
 }

 if (
  ((pSettings->usDspBaseIO & 0xF00F) != 0)
  || (pSettings->usDspBaseIO & 0x0FF0) == 0
 ) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: Invalid DSP base I/O address %x\n", pSettings->usDspBaseIO);
  goto exit_cleanup;
 }

 if (pSettings->bModemEnabled) {
  if (
   pSettings->usUartIrq >= s_numIrqs
   || s_ausThinkpadIrqToField[pSettings->usUartIrq] == 0xFFFF
  ) {
   PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: Invalid UART IRQ %x\n", pSettings->usUartIrq);
   goto exit_cleanup;
  }
  switch (pSettings->usUartBaseIO) {
   case 0x03F8:
   case 0x02F8:
   case 0x03E8:
   case 0x02E8:
    break;

   default:
    PRINTK_ERROR("tp3780i::tp3780I_EnableDSP: Error: Invalid UART base I/O address %x\n", pSettings->usUartBaseIO);
    goto exit_cleanup;
  }
 }

 pSettings->bDspIrqActiveLow = pSettings->bDspIrqPulse = true;
 pSettings->bUartIrqActiveLow = pSettings->bUartIrqPulse = true;

 if (pBDData->bShareDspIrq) {
  pSettings->bDspIrqActiveLow = false;
 }
 if (pBDData->bShareUartIrq) {
  pSettings->bUartIrqActiveLow = false;
 }

 pSettings->usNumTransfers = TP_CFG_NumTransfers;
 pSettings->usReRequest = TP_CFG_RerequestTimer;
 pSettings->bEnableMEMCS16 = TP_CFG_MEMCS16;
 pSettings->usIsaMemCmdWidth = TP_CFG_IsaMemCmdWidth;
 pSettings->bGateIOCHRDY = TP_CFG_GateIOCHRDY;
 pSettings->bEnablePwrMgmt = TP_CFG_EnablePwrMgmt;
 pSettings->usHBusTimerLoadValue = TP_CFG_HBusTimerValue;
 pSettings->bDisableLBusTimeout = TP_CFG_DisableLBusTimeout;
 pSettings->usN_Divisor = TP_CFG_N_Divisor;
 pSettings->usM_Multiplier = TP_CFG_M_Multiplier;
 pSettings->bPllBypass = TP_CFG_PllBypass;
 pSettings->usChipletEnable = TP_CFG_ChipletEnable;

 if (request_irq(pSettings->usUartIrq, &UartInterrupt, 0, "mwave_uart", NULL)) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: Could not get UART IRQ %x\n", pSettings->usUartIrq);
  goto exit_cleanup;
 } else {  /* no conflict just release */
  free_irq(pSettings->usUartIrq, NULL);
 }

 if (request_irq(pSettings->usDspIrq, &DspInterrupt, 0, "mwave_3780i", NULL)) {
  PRINTK_ERROR("tp3780i::tp3780I_EnableDSP: Error: Could not get 3780i IRQ %x\n", pSettings->usDspIrq);
  goto exit_cleanup;
 } else {
  PRINTK_3(TRACE_TP3780I,
   "tp3780i::tp3780I_EnableDSP, got interrupt %x bShareDspIrq %x\n",
   pSettings->usDspIrq, pBDData->bShareDspIrq);
  bInterruptAllocated = true;
  pSettings->bInterruptClaimed = true;
 }

 smapi_set_DSP_power_state(false);
 if (smapi_set_DSP_power_state(true)) {
  PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: smapi_set_DSP_power_state(true) failed\n");
  goto exit_cleanup;
 } else {
  bDSPPoweredUp = true;
 }

 if (dsp3780I_EnableDSP(pSettings, s_ausThinkpadIrqToField, s_ausThinkpadDmaToField)) {
  PRINTK_ERROR("tp3780i::tp3780I_EnableDSP: Error: dsp7880I_EnableDSP() failed\n");
  goto exit_cleanup;
 }

 EnableSRAM(pBDData);

 pBDData->bDSPEnabled = true;

 PRINTK_1(TRACE_TP3780I, "tp3780i::tp3780I_EnableDSP exit\n");

 return 0;

exit_cleanup:
 PRINTK_ERROR("tp3780i::tp3780I_EnableDSP: Cleaning up\n");
 if (bDSPPoweredUp)
  smapi_set_DSP_power_state(false);
 if (bInterruptAllocated) {
  free_irq(pSettings->usDspIrq, NULL);
  pSettings->bInterruptClaimed = false;
 }
 return -EIO;
}


int tp3780I_DisableDSP(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_DisableDSP entry pBDData %p\n", pBDData);

 if (pBDData->bDSPEnabled) {
  dsp3780I_DisableDSP(&pBDData->rDspSettings);
  if (pSettings->bInterruptClaimed) {
   free_irq(pSettings->usDspIrq, NULL);
   pSettings->bInterruptClaimed = false;
  }
  smapi_set_DSP_power_state(false);
  pBDData->bDSPEnabled = false;
 }

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_DisableDSP exit retval %x\n", retval);

 return retval;
}


int tp3780I_ResetDSP(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_ResetDSP entry pBDData %p\n",
  pBDData);

 if (dsp3780I_Reset(pSettings) == 0) {
  EnableSRAM(pBDData);
 } else {
  retval = -EIO;
 }

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_ResetDSP exit retval %x\n", retval);

 return retval;
}


int tp3780I_StartDSP(THINKPAD_BD_DATA * pBDData)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_StartDSP entry pBDData %p\n", pBDData);

 if (dsp3780I_Run(pSettings) == 0) {
  // @BUG @TBD EnableSRAM(pBDData);
 } else {
  retval = -EIO;
 }

 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_StartDSP exit retval %x\n", retval);

 return retval;
}


int tp3780I_QueryAbilities(THINKPAD_BD_DATA * pBDData, MW_ABILITIES * pAbilities)
{
 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_QueryAbilities entry pBDData %p\n", pBDData);

 memset(pAbilities, 0, sizeof(*pAbilities));
 /* fill out standard constant fields */
 pAbilities->instr_per_sec = pBDData->rDspSettings.uIps;
 pAbilities->data_size = pBDData->rDspSettings.uDStoreSize;
 pAbilities->inst_size = pBDData->rDspSettings.uIStoreSize;
 pAbilities->bus_dma_bw = pBDData->rDspSettings.uDmaBandwidth;

 /* fill out dynamically determined fields */
 pAbilities->component_list[0] = 0x00010000 | MW_ADC_MASK;
 pAbilities->component_list[1] = 0x00010000 | MW_ACI_MASK;
 pAbilities->component_list[2] = 0x00010000 | MW_AIC1_MASK;
 pAbilities->component_list[3] = 0x00010000 | MW_AIC2_MASK;
 pAbilities->component_list[4] = 0x00010000 | MW_CDDAC_MASK;
 pAbilities->component_list[5] = 0x00010000 | MW_MIDI_MASK;
 pAbilities->component_list[6] = 0x00010000 | MW_UART_MASK;
 pAbilities->component_count = 7;

 /* Fill out Mwave OS and BIOS task names */

 memcpy(pAbilities->mwave_os_name, TP_ABILITIES_MWAVEOS_NAME,
  sizeof(TP_ABILITIES_MWAVEOS_NAME));
 memcpy(pAbilities->bios_task_name, TP_ABILITIES_BIOSTASK_NAME,
  sizeof(TP_ABILITIES_BIOSTASK_NAME));

 PRINTK_1(TRACE_TP3780I,
  "tp3780i::tp3780I_QueryAbilities exit retval=SUCCESSFUL\n");

 return 0;
}

int tp3780I_ReadWriteDspDStore(THINKPAD_BD_DATA * pBDData, unsigned int uOpcode,
                               void __user *pvBuffer, unsigned int uCount,
                               unsigned long ulDSPAddr)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;
 unsigned short usDspBaseIO = pSettings->usDspBaseIO;
 bool bRC = 0;

 PRINTK_6(TRACE_TP3780I,
  "tp3780i::tp3780I_ReadWriteDspDStore entry pBDData %p, uOpcode %x, pvBuffer %p, uCount %x, ulDSPAddr %lx\n",
  pBDData, uOpcode, pvBuffer, uCount, ulDSPAddr);

 if (pBDData->bDSPEnabled) {
  switch (uOpcode) {
  case IOCTL_MW_READ_DATA:
   bRC = dsp3780I_ReadDStore(usDspBaseIO, pvBuffer, uCount, ulDSPAddr);
   break;

  case IOCTL_MW_READCLEAR_DATA:
   bRC = dsp3780I_ReadAndClearDStore(usDspBaseIO, pvBuffer, uCount, ulDSPAddr);
   break;

  case IOCTL_MW_WRITE_DATA:
   bRC = dsp3780I_WriteDStore(usDspBaseIO, pvBuffer, uCount, ulDSPAddr);
   break;
  }
 }

 retval = (bRC) ? -EIO : 0;
 PRINTK_2(TRACE_TP3780I, "tp3780i::tp3780I_ReadWriteDspDStore exit retval %x\n", retval);

 return retval;
}


int tp3780I_ReadWriteDspIStore(THINKPAD_BD_DATA * pBDData, unsigned int uOpcode,
                               void __user *pvBuffer, unsigned int uCount,
                               unsigned long ulDSPAddr)
{
 int retval = 0;
 DSP_3780I_CONFIG_SETTINGS *pSettings = &pBDData->rDspSettings;
 unsigned short usDspBaseIO = pSettings->usDspBaseIO;
 bool bRC = 0;

 PRINTK_6(TRACE_TP3780I,
  "tp3780i::tp3780I_ReadWriteDspIStore entry pBDData %p, uOpcode %x, pvBuffer %p, uCount %x, ulDSPAddr %lx\n",
  pBDData, uOpcode, pvBuffer, uCount, ulDSPAddr);

 if (pBDData->bDSPEnabled) {
  switch (uOpcode) {
  case IOCTL_MW_READ_INST:
   bRC = dsp3780I_ReadIStore(usDspBaseIO, pvBuffer, uCount, ulDSPAddr);
   break;

  case IOCTL_MW_WRITE_INST:
   bRC = dsp3780I_WriteIStore(usDspBaseIO, pvBuffer, uCount, ulDSPAddr);
   break;
  }
 }

 retval = (bRC) ? -EIO : 0;

 PRINTK_2(TRACE_TP3780I,
  "tp3780i::tp3780I_ReadWriteDspIStore exit retval %x\n", retval);

 return retval;
}