//-------------------------------------------------------------------
//	satainfo.c
//
//	NOTE: Written and tested using Linux kernel version 2.6.26.
//
//	programmer: ALLAN CRUSE
//	written on: 10 AUG 2008
//	revised on: 20 NOV 2008
//-------------------------------------------------------------------

#include <linux/module.h>	// for init_module() 
#include <linux/proc_fs.h>	// for create_proc_read_entry() 
#include <linux/pci.h>		// for pci_get_device()
#include <asm/uaccess.h>	// for put_user()

#define CLASS_SATA_NEW 0x010601	// for SATA Mass Storage
#define CLASS_SATA_OLD 0x01018F	// for SATA Mass Storage

#define VENDOR_ID	0x8086	// Intel Corporation
#define DEVICE_ID	0x27C1	// ICH7 SATA Controller 
//#define DEVICE_ID	0x2922	// ICH7 SATA Controller 

char modname[] = "satainfo";
struct pci_dev	*devp;

int 
my_info( char *buf, char **start, off_t off, int count, int *eof, void *data )
{
	int	i, len = 0;

	len += sprintf( buf+len, "\n PCI Configuration Space -- " );
	len += sprintf( buf+len, "Intel Serial-ATA " ); 
	len += sprintf( buf+len, "Mass Storage Controller \n" );
	for (i = 0; i < 0x100; i += 4 )
		{
		u32	datum;
		pci_read_config_dword( devp, i, &datum );
		if ( (i % 32) == 0 ) 
			len += sprintf( buf+len, "\n 0x%02X: ", i );
		len += sprintf( buf+len, "%08X ", datum );
		}
	len += sprintf( buf+len, "\n" );
	len += sprintf( buf+len, "\n" );

	return	len;
}


static int __init my_init( void )
{
	printk( "<1>\nInstalling \'%s\' module \n", modname );

	if ( !devp ) devp = pci_get_class( CLASS_SATA_NEW, NULL );
	if ( !devp ) devp = pci_get_class( CLASS_SATA_OLD, NULL );
	if ( !devp ) return -ENODEV;
	printk( " SATA Controller: vendor=%04X device=%04X \n",
		devp->vendor, devp->device );
	if ( devp->vendor != VENDOR_ID ) return -ENODEV;

	create_proc_read_entry( modname, 0, NULL, my_info, NULL );
	return	0;
}


static void __exit my_exit(void )
{
	remove_proc_entry( modname, NULL );

	printk( "<1>Removing \'%s\' module\n", modname );
}

module_init( my_init );
module_exit( my_exit );
MODULE_LICENSE("GPL");