mwavedd.c

h内核

				remove_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
				set_current_state(TASK_RUNNING);
				PRINTK_2(TRACE_MWAVE,
					"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC,"
					" returning thread for ipc %x"
					" processing\n",
					ipcnum);
			}
		}
			break;
	
		case IOCTL_MW_UNREGISTER_IPC: {
			unsigned int ipcnum = (unsigned int) ioarg;
	
			PRINTK_2(TRACE_MWAVE,
				"mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC"
				" ipcnum %x\n",
				ipcnum);
			if (ipcnum > ARRAY_SIZE(pDrvData->IPCs)) {
				PRINTK_ERROR(KERN_ERR_MWAVE
						"mwavedd::mwave_ioctl:"
						" IOCTL_MW_UNREGISTER_IPC:"
						" Error: Invalid ipcnum %x\n",
						ipcnum);
				return -EINVAL;
			}
			if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
				pDrvData->IPCs[ipcnum].bIsEnabled = FALSE;
				if (pDrvData->IPCs[ipcnum].bIsHere == TRUE) {
					wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
				}
			}
		}
			break;
	
		default:
			PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl:"
					" Error: Unrecognized iocmd %x\n",
					iocmd);
			return -ENOTTY;
			break;
	} /* switch */

	PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);

	return retval;
}


static ssize_t mwave_read(struct file *file, char __user *buf, size_t count,
                          loff_t * ppos)
{
	PRINTK_5(TRACE_MWAVE,
		"mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n",
		file, buf, count, ppos);

	return -EINVAL;
}


static ssize_t mwave_write(struct file *file, const char __user *buf,
                           size_t count, loff_t * ppos)
{
	PRINTK_5(TRACE_MWAVE,
		"mwavedd::mwave_write entry file %p, buf %p,"
		" count %zx ppos %p\n",
		file, buf, count, ppos);

	return -EINVAL;
}


static int register_serial_portandirq(unsigned int port, int irq)
{
	struct serial_struct serial;

	switch ( port ) {
		case 0x3f8:
		case 0x2f8:
		case 0x3e8:
		case 0x2e8:
			/* OK */
			break;
		default:
			PRINTK_ERROR(KERN_ERR_MWAVE
					"mwavedd::register_serial_portandirq:"
					" Error: Illegal port %x\n", port );
			return -1;
	} /* switch */
	/* port is okay */

	switch ( irq ) {
		case 3:
		case 4:
		case 5:
		case 7:
			/* OK */
			break;
		default:
			PRINTK_ERROR(KERN_ERR_MWAVE
					"mwavedd::register_serial_portandirq:"
					" Error: Illegal irq %x\n", irq );
			return -1;
	} /* switch */
	/* irq is okay */

	memset(&serial, 0, sizeof(serial));
	serial.port = port;
	serial.irq = irq;
	serial.flags = ASYNC_SHARE_IRQ;

	return register_serial(&serial);
}


static struct file_operations mwave_fops = {
	.owner		= THIS_MODULE,
	.read		= mwave_read,
	.write		= mwave_write,
	.ioctl		= mwave_ioctl,
	.open		= mwave_open,
	.release	= mwave_close
};


static struct miscdevice mwave_misc_dev = { MWAVE_MINOR, "mwave", &mwave_fops };

#if 0 /* totally b0rked */
/*
 * sysfs support <[e-mail]>
 */

struct device mwave_device;

/* Prevent code redundancy, create a macro for mwave_show_* functions. */
#define mwave_show_function(attr_name, format_string, field)		\
static ssize_t mwave_show_##attr_name(struct device *dev, char *buf)	\
{									\
	DSP_3780I_CONFIG_SETTINGS *pSettings =				\
		&mwave_s_mdd.rBDData.rDspSettings;			\
        return sprintf(buf, format_string, pSettings->field);		\
}

/* All of our attributes are read attributes. */
#define mwave_dev_rd_attr(attr_name, format_string, field)		\
	mwave_show_function(attr_name, format_string, field)		\
static DEVICE_ATTR(attr_name, S_IRUGO, mwave_show_##attr_name, NULL)

mwave_dev_rd_attr (3780i_dma, "%i\n", usDspDma);
mwave_dev_rd_attr (3780i_irq, "%i\n", usDspIrq);
mwave_dev_rd_attr (3780i_io, "%#.4x\n", usDspBaseIO);
mwave_dev_rd_attr (uart_irq, "%i\n", usUartIrq);
mwave_dev_rd_attr (uart_io, "%#.4x\n", usUartBaseIO);

static struct device_attribute * const mwave_dev_attrs[] = {
	&dev_attr_3780i_dma,
	&dev_attr_3780i_irq,
	&dev_attr_3780i_io,
	&dev_attr_uart_irq,
	&dev_attr_uart_io,
};
#endif

/*
* mwave_init is called on module load
*
* mwave_exit is called on module unload
* mwave_exit is also used to clean up after an aborted mwave_init
*/
static void mwave_exit(void)
{
	pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;

	PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit entry\n");

#if 0
	for (i = 0; i < pDrvData->nr_registered_attrs; i++)
		device_remove_file(&mwave_device, mwave_dev_attrs[i]);
	pDrvData->nr_registered_attrs = 0;

	if (pDrvData->device_registered) {
		device_unregister(&mwave_device);
		pDrvData->device_registered = FALSE;
	}
#endif

	if ( pDrvData->sLine >= 0 ) {
		unregister_serial(pDrvData->sLine);
	}
	if (pDrvData->bMwaveDevRegistered) {
		misc_deregister(&mwave_misc_dev);
	}
	if (pDrvData->bDSPEnabled) {
		tp3780I_DisableDSP(&pDrvData->rBDData);
	}
	if (pDrvData->bResourcesClaimed) {
		tp3780I_ReleaseResources(&pDrvData->rBDData);
	}
	if (pDrvData->bBDInitialized) {
		tp3780I_Cleanup(&pDrvData->rBDData);
	}

	PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit exit\n");
}

module_exit(mwave_exit);

static int __init mwave_init(void)
{
	int i;
	int retval = 0;
	pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;

	PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_init entry\n");

	memset(&mwave_s_mdd, 0, sizeof(MWAVE_DEVICE_DATA));

	pDrvData->bBDInitialized = FALSE;
	pDrvData->bResourcesClaimed = FALSE;
	pDrvData->bDSPEnabled = FALSE;
	pDrvData->bDSPReset = FALSE;
	pDrvData->bMwaveDevRegistered = FALSE;
	pDrvData->sLine = -1;

	for (i = 0; i < ARRAY_SIZE(pDrvData->IPCs); i++) {
		pDrvData->IPCs[i].bIsEnabled = FALSE;
		pDrvData->IPCs[i].bIsHere = FALSE;
		pDrvData->IPCs[i].usIntCount = 0;	/* no ints received yet */
		init_waitqueue_head(&pDrvData->IPCs[i].ipc_wait_queue);
	}

	retval = tp3780I_InitializeBoardData(&pDrvData->rBDData);
	PRINTK_2(TRACE_MWAVE,
		"mwavedd::mwave_init, return from tp3780I_InitializeBoardData"
		" retval %x\n",
		retval);
	if (retval) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd::mwave_init: Error:"
				" Failed to initialize board data\n");
		goto cleanup_error;
	}
	pDrvData->bBDInitialized = TRUE;

	retval = tp3780I_CalcResources(&pDrvData->rBDData);
	PRINTK_2(TRACE_MWAVE,
		"mwavedd::mwave_init, return from tp3780I_CalcResources"
		" retval %x\n",
		retval);
	if (retval) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd:mwave_init: Error:"
				" Failed to calculate resources\n");
		goto cleanup_error;
	}

	retval = tp3780I_ClaimResources(&pDrvData->rBDData);
	PRINTK_2(TRACE_MWAVE,
		"mwavedd::mwave_init, return from tp3780I_ClaimResources"
		" retval %x\n",
		retval);
	if (retval) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd:mwave_init: Error:"
				" Failed to claim resources\n");
		goto cleanup_error;
	}
	pDrvData->bResourcesClaimed = TRUE;

	retval = tp3780I_EnableDSP(&pDrvData->rBDData);
	PRINTK_2(TRACE_MWAVE,
		"mwavedd::mwave_init, return from tp3780I_EnableDSP"
		" retval %x\n",
		retval);
	if (retval) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd:mwave_init: Error:"
				" Failed to enable DSP\n");
		goto cleanup_error;
	}
	pDrvData->bDSPEnabled = TRUE;

	if (misc_register(&mwave_misc_dev) < 0) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd:mwave_init: Error:"
				" Failed to register misc device\n");
		goto cleanup_error;
	}
	pDrvData->bMwaveDevRegistered = TRUE;

	pDrvData->sLine = register_serial_portandirq(
		pDrvData->rBDData.rDspSettings.usUartBaseIO,
		pDrvData->rBDData.rDspSettings.usUartIrq
	);
	if (pDrvData->sLine < 0) {
		PRINTK_ERROR(KERN_ERR_MWAVE
				"mwavedd:mwave_init: Error:"
				" Failed to register serial driver\n");
		goto cleanup_error;
	}
	/* uart is registered */

#if 0
	/* sysfs */
	memset(&mwave_device, 0, sizeof (struct device));
	snprintf(mwave_device.bus_id, BUS_ID_SIZE, "mwave");

	if (device_register(&mwave_device))
		goto cleanup_error;
	pDrvData->device_registered = TRUE;
	for (i = 0; i < ARRAY_SIZE(mwave_dev_attrs); i++) {
		if(device_create_file(&mwave_device, mwave_dev_attrs[i])) {
			PRINTK_ERROR(KERN_ERR_MWAVE
					"mwavedd:mwave_init: Error:"
					" Failed to create sysfs file %s\n",
					mwave_dev_attrs[i]->attr.name);
			goto cleanup_error;
		}
		pDrvData->nr_registered_attrs++;
	}
#endif

	/* SUCCESS! */
	return 0;

cleanup_error:
	PRINTK_ERROR(KERN_ERR_MWAVE
			"mwavedd::mwave_init: Error:"
			" Failed to initialize\n");
	mwave_exit(); /* clean up */

	return -EIO;
}

module_init(mwave_init);