/* Calypso SIM registers definition */

#define	SIM_BASE_ADDR	0xFFFE0000

struct sim_registers {
	u16	cmd;
	u16	stat;
	u16	conf1;
	u16	conf2;
	u16	it;
	u16	drx;
	u16	dtx;
	u16	maskit;
	u16	it_cd;
};

#define	SIMREGS	(*(volatile struct sim_registers *) SIM_BASE_ADDR)

/*
 * Bit definitions 
 */ 
// control regidter
#define SIM_CMD_CRST          0x0001
#define SIM_CMD_SWRST         0x0002
#define SIM_CMD_STOP          0x0004
#define SIM_CMD_START         0x0008
#define SIM_CMD_CLKEN         0x0010	

// status register
#define SIM_STAT_CD           0x0001   // card present
#define SIM_STAT_TXPAR        0x0002   // transmit parity status
#define SIM_STAT_FFULL        0x0004   // fifo full
#define SIM_STAT_FEMPTY       0x0008   // fifo empty

// configuration register
#define SIM_CONF1_CHKPAR      0x0001   // enable receipt check parity
#define SIM_CONF1_CONV        0x0002   // coding convention
#define SIM_CONF1_TXRX        0x0004   // SIO line direction
#define SIM_CONF1_SCLKEN      0x0008   // enable SIM clock
#define SIM_CONF1_RSVD        0x0010   // reserved
#define SIM_CONF1_SCLKDIV	  0x0020   // SIM clock frquency
#define SIM_CONF1_SCLKLEV	  0x0040   // SIM clock idle level
#define SIM_CONF1_ETU	      0x0080   // ETU period
#define SIM_CONF1_BYPASS      0x0100   // bypass hardware timers
#define SIM_CONF1_SVCCLEV     0x0200
#define SIM_CONF1_SRSTLEV     0x0400
#define SIM_CONF1_SIOLOW      0x8000   //force SIO to low level	 

// interrupt status register
#define SIM_IT_NATR           0x0001   // No answer to reset
#define SIM_IT_WT             0x0002
#define SIM_IT_ITOV           0x0004   
#define SIM_IT_ITTX           0x0008   // Transmit
#define SIM_IT_ITRX           0x0010   // Receipt

#define SIM_IT_CD             0x0001   // Card insertion/extraction

// interrupt mask register
#define SIM_MASK_NATR         0x0001   // No answer to reset
#define SIM_MASK_WT           0x0002
#define SIM_MASK_OV           0x0004
#define SIM_MASK_TX           0x0008   // Transmit
#define SIM_MASK_RX           0x0010   // Receipt
#define SIM_MASK_CD           0x0020   // Card insertion/extraction	

// receveid byte register
#define SIM_DRX_STATRXPAR     0x0100   // received byte parity status