tp3780i.c

linux-2.6.15.6

/*
*
* 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"

extern MWAVE_DEVICE_DATA mwave_s_mdd;

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, struct pt_regs *regs)
{
	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, struct pt_regs *regs)
{
	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;
}

int tp3780I_Cleanup(THINKPAD_BD_DATA * pBDData)
{
	int retval = 0;

	PRINTK_2(TRACE_TP3780I,
		"tp3780i::tp3780I_Cleanup entry and exit pBDData %p\n", pBDData);

	return retval;
}

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;
	BOOLEAN bDSPPoweredUp = FALSE, bInterruptAllocated = FALSE;

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