/*
 * Dump SMSC/LPC47N227 config, typically IRDA config
 */


#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>

/******************************************
 Keys. They should work with every SMsC SIO
 ******************************************/

#define SMSCSIO_CFGACCESSKEY		0x55
#define SMSCSIO_CFGEXITKEY			0xaa

/*****************************
 * Generic SIO Flat (!?)     *
 *****************************/
 
/* Register 0x0d */
#define SMSCSIOFLAT_DEVICEID_REG				0x0d

/* Register 0x0c */
#define SMSCSIOFLAT_UARTMODE0C_REG				0x0c
#define 	SMSCSIOFLAT_UART2MODE_MASK			0x38
#define 	SMSCSIOFLAT_UART2MODE_VAL_COM		0x00
#define 	SMSCSIOFLAT_UART2MODE_VAL_IRDA		0x08
#define 	SMSCSIOFLAT_UART2MODE_VAL_ASKIR		0x10

/* Register 0x25 */
#define SMSCSIOFLAT_UART2BASEADDR_REG			0x25

/* Register 0x2b */
#define SMSCSIOFLAT_FIRBASEADDR_REG				0x2b

/* Register 0x2c */
#define SMSCSIOFLAT_FIRDMASELECT_REG			0x2c
#define 	SMSCSIOFLAT_FIRDMASELECT_MASK		0x0f

/* Register 0x28 */
#define SMSCSIOFLAT_UARTIRQSELECT_REG			0x28
#define 	SMSCSIOFLAT_UART2IRQSELECT_MASK		0x0f
#define 	SMSCSIOFLAT_UART1IRQSELECT_MASK		0xf0
#define 	SMSCSIOFLAT_UARTIRQSELECT_VAL_NONE	0x00


/*********************
 * LPC47N227         *
 *********************/

#define LPC47N227_CFGACCESSKEY		0x55
#define LPC47N227_CFGEXITKEY		0xaa

/* Register 0x00 */
#define LPC47N227_FDCPOWERVALIDCONF_REG		0x00
#define 	LPC47N227_FDCPOWER_MASK			0x08
#define 	LPC47N227_VALID_MASK				0x80

/* Register 0x02 */
#define LPC47N227_UART12POWER_REG				0x02
#define 	LPC47N227_UART1POWERDOWN_MASK		0x08
#define 	LPC47N227_UART2POWERDOWN_MASK		0x80

/* Register 0x07 */
#define LPC47N227_APMBOOTDRIVE_REG				0x07
#define 	LPC47N227_PARPORT2AUTOPWRDOWN_MASK	0x10 /* auto power down on if set */
#define 	LPC47N227_UART2AUTOPWRDOWN_MASK	0x20 /* auto power down on if set */
#define 	LPC47N227_UART1AUTOPWRDOWN_MASK	0x40 /* auto power down on if set */

/* Register 0x0c */
#define LPC47N227_UARTMODE0C_REG				0x0c
#define 	LPC47N227_UART2MODE_MASK			0x38
#define 	LPC47N227_UART2MODE_VAL_COM		0x00
#define 	LPC47N227_UART2MODE_VAL_IRDA		0x08
#define 	LPC47N227_UART2MODE_VAL_ASKIR		0x10

/* Register 0x0d */
#define LPC47N227_DEVICEID_REG					0x0d
#define 	LPC47N227_DEVICEID_DEFVAL			0x5a

/* Register 0x0e */
#define LPC47N227_REVISIONID_REG				0x0e

/* Register 0x25 */
#define LPC47N227_UART2BASEADDR_REG			0x25

/* Register 0x28 */
#define LPC47N227_UARTIRQSELECT_REG			0x28
#define 	LPC47N227_UART2IRQSELECT_MASK		0x0f
#define 	LPC47N227_UART1IRQSELECT_MASK		0xf0
#define 	LPC47N227_UARTIRQSELECT_VAL_NONE	0x00

/* Register 0x2b */
#define LPC47N227_FIRBASEADDR_REG				0x2b

/* Register 0x2c */
#define LPC47N227_FIRDMASELECT_REG				0x2c
#define 	LPC47N227_FIRDMASELECT_MASK		0x0f
#define 	LPC47N227_FIRDMASELECT_VAL_DMA1	0x01 /* 47n227 has three dma channels */
#define 	LPC47N227_FIRDMASELECT_VAL_DMA2	0x02
#define 	LPC47N227_FIRDMASELECT_VAL_DMA3	0x03
#define 	LPC47N227_FIRDMASELECT_VAL_NONE	0x0f

static inline unsigned int smsc_read(unsigned int port, unsigned int reg)
{
	outb(reg, port);
	return inb(port + 1);
}

static inline void smsc_write(unsigned int port, unsigned int reg, unsigned int
val)
{
	outb(reg, port);
	outb(val, port + 1);
}

static void smsc_dump(unsigned int iobase)
{
	unsigned char val;

	outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state

	val = smsc_read(iobase, 0x24);
	printf("%s: 0x%02x 0x%02x UART1 config\n", __FUNCTION__, 0x24, val);

	val = smsc_read(iobase, SMSCSIOFLAT_UART2BASEADDR_REG);
	printf("%s: 0x%02x 0x%02x SIR base (0x%x)\n", __FUNCTION__, SMSCSIOFLAT_UART2BASEADDR_REG, val, val << 2);

	val = smsc_read(iobase, SMSCSIOFLAT_UARTIRQSELECT_REG);
	printf("%s: 0x%02x 0x%02x UART IRQ\n", __FUNCTION__, SMSCSIOFLAT_UARTIRQSELECT_REG, val);

	val = smsc_read(iobase, SMSCSIOFLAT_FIRBASEADDR_REG);
	printf("%s: 0x%02x 0x%02x FIR base (0x%x)\n", __FUNCTION__, SMSCSIOFLAT_FIRBASEADDR_REG, val, val << 3);

	val = smsc_read(iobase, SMSCSIOFLAT_FIRDMASELECT_REG);
	printf("%s: 0x%02x 0x%02x FIR DMA\n", __FUNCTION__, SMSCSIOFLAT_FIRDMASELECT_REG, val);

	val = smsc_read(iobase, SMSCSIOFLAT_UARTMODE0C_REG);
	printf("%s: 0x%02x 0x%02x IRDA mode\n", __FUNCTION__, SMSCSIOFLAT_UARTMODE0C_REG, val);

	val = smsc_read(iobase, LPC47N227_APMBOOTDRIVE_REG);
	printf("%s: 0x%02x 0x%02x powerdown mode\n", __FUNCTION__, LPC47N227_APMBOOTDRIVE_REG, val);

	val = smsc_read(iobase, 0x0a);
	printf("%s: 0x%02x 0x%02x toshiba mystery\n", __FUNCTION__, 0x0a, val);

	outb(LPC47N227_CFGEXITKEY, iobase); // leave configuration state
}

main()
{
	if (iopl(3) < 0) {
		perror("iopl");
		exit(-1);
	}

	/* see smsc-ircc2.c for typical addresses */
	smsc_dump(0x2e);
	exit(0);
}