diff options
Diffstat (limited to 'board/sandburst/common/ppc440gx_i2c.c')
| -rw-r--r-- | board/sandburst/common/ppc440gx_i2c.c | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/board/sandburst/common/ppc440gx_i2c.c b/board/sandburst/common/ppc440gx_i2c.c index bc88e5a..35c4e60 100644 --- a/board/sandburst/common/ppc440gx_i2c.c +++ b/board/sandburst/common/ppc440gx_i2c.c @@ -31,6 +31,7 @@ #include <i2c.h> #include <command.h> #include "ppc440gx_i2c.h" +#include <asm-ppc/io.h> #ifdef CONFIG_I2C_BUS1 @@ -47,16 +48,18 @@ static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES; #endif +static struct ppc4xx_i2c *i2c = (struct ppc4xx_i2c *)I2C_REGISTERS_BUS1_BASE_ADDRESS; + static void _i2c_bus1_reset (void) { int i, status; /* Reset status register */ /* write 1 in SCMP and IRQA to clear these fields */ - out8 (IIC_STS1, 0x0A); + out_8 (IIC_STS1, 0x0A); /* write 1 in IRQP IRQD LA ICT XFRA to clear these fields */ - out8 (IIC_EXTSTS1, 0x8F); + out_8 (IIC_EXTSTS1, 0x8F); __asm__ volatile ("eieio"); /* @@ -66,36 +69,36 @@ static void _i2c_bus1_reset (void) i = 10; do { /* Get status */ - status = in8 (IIC_STS1); + status = in_8 (IIC_STS1); udelay (500); /* 500us */ i--; } while ((status & IIC_STS_PT) && (i > 0)); /* Soft reset controller */ - status = in8 (IIC_XTCNTLSS1); - out8 (IIC_XTCNTLSS1, (status | IIC_XTCNTLSS_SRST)); + status = in_8 (IIC_XTCNTLSS1); + out_8 (IIC_XTCNTLSS1, (status | IIC_XTCNTLSS_SRST)); __asm__ volatile ("eieio"); /* make sure where in initial state, data hi, clock hi */ - out8 (IIC_DIRECTCNTL1, 0xC); + out_8 (IIC_DIRECTCNTL1, 0xC); for (i = 0; i < 10; i++) { - if ((in8 (IIC_DIRECTCNTL1) & 0x3) != 0x3) { + if ((in_8 (IIC_DIRECTCNTL1) & 0x3) != 0x3) { /* clock until we get to known state */ - out8 (IIC_DIRECTCNTL1, 0x8); /* clock lo */ + out_8 (IIC_DIRECTCNTL1, 0x8); /* clock lo */ udelay (100); /* 100us */ - out8 (IIC_DIRECTCNTL1, 0xC); /* clock hi */ + out_8 (IIC_DIRECTCNTL1, 0xC); /* clock hi */ udelay (100); /* 100us */ } else { break; } } /* send start condition */ - out8 (IIC_DIRECTCNTL1, 0x4); + out_8 (IIC_DIRECTCNTL1, 0x4); udelay (1000); /* 1ms */ /* send stop condition */ - out8 (IIC_DIRECTCNTL1, 0xC); + out_8 (IIC_DIRECTCNTL1, 0xC); udelay (1000); /* 1ms */ /* Unreset controller */ - out8 (IIC_XTCNTLSS1, (status & ~IIC_XTCNTLSS_SRST)); + out_8 (IIC_XTCNTLSS1, (status & ~IIC_XTCNTLSS_SRST)); udelay (1000); /* 1ms */ } @@ -117,16 +120,16 @@ void i2c1_init (int speed, int slaveadd) _i2c_bus1_reset (); /* clear lo master address */ - out8 (IIC_LMADR1, 0); + out_8 (IIC_LMADR1, 0); /* clear hi master address */ - out8 (IIC_HMADR1, 0); + out_8 (IIC_HMADR1, 0); /* clear lo slave address */ - out8 (IIC_LSADR1, 0); + out_8 (IIC_LSADR1, 0); /* clear hi slave address */ - out8 (IIC_HSADR1, 0); + out_8 (IIC_HSADR1, 0); /* Clock divide Register */ /* get OPB frequency */ @@ -136,25 +139,25 @@ void i2c1_init (int speed, int slaveadd) divisor = (freqOPB - 1) / 10000000; if (divisor == 0) divisor = 1; - out8 (IIC_CLKDIV1, divisor); + out_8 (IIC_CLKDIV1, divisor); /* no interrupts */ - out8 (IIC_INTRMSK1, 0); + out_8 (IIC_INTRMSK1, 0); /* clear transfer count */ - out8 (IIC_XFRCNT1, 0); + out_8 (IIC_XFRCNT1, 0); /* clear extended control & stat */ /* write 1 in SRC SRS SWC SWS to clear these fields */ - out8 (IIC_XTCNTLSS1, 0xF0); + out_8 (IIC_XTCNTLSS1, 0xF0); /* Mode Control Register Flush Slave/Master data buffer */ - out8 (IIC_MDCNTL1, IIC_MDCNTL_FSDB | IIC_MDCNTL_FMDB); + out_8 (IIC_MDCNTL1, IIC_MDCNTL_FSDB | IIC_MDCNTL_FMDB); __asm__ volatile ("eieio"); - val = in8(IIC_MDCNTL1); + val = in_8(IIC_MDCNTL1); __asm__ volatile ("eieio"); /* Ignore General Call, slave transfers are ignored, @@ -167,10 +170,10 @@ void i2c1_init (int speed, int slaveadd) if( speed >= 400000 ){ val |= IIC_MDCNTL_FSM; } - out8 (IIC_MDCNTL1, val); + out_8 (IIC_MDCNTL1, val); /* clear control reg */ - out8 (IIC_CNTL1, 0x00); + out_8 (IIC_CNTL1, 0x00); __asm__ volatile ("eieio"); } @@ -178,7 +181,7 @@ void i2c1_init (int speed, int slaveadd) /* This code tries to use the features of the 405GP i2c controller. It will transfer up to 4 bytes in one pass - on the loop. It only does out8(lbz) to the buffer when it + on the loop. It only does out_8(lbz) to the buffer when it is possible to do out16(lhz) transfers. cmd_type is 0 for write 1 for read. @@ -232,12 +235,12 @@ int i2c_transfer1(unsigned char cmd_type, } /*Clear Stop Complete Bit*/ - out8(IIC_STS1,IIC_STS_SCMP); + out_8(IIC_STS1,IIC_STS_SCMP); /* Check init */ i=10; do { /* Get status */ - status = in8(IIC_STS1); + status = in_8(IIC_STS1); __asm__ volatile("eieio"); i--; } while ((status & IIC_STS_PT) && (i>0)); @@ -247,12 +250,12 @@ int i2c_transfer1(unsigned char cmd_type, return(result); } /*flush the Master/Slave Databuffers*/ - out8(IIC_MDCNTL1, ((in8(IIC_MDCNTL1))|IIC_MDCNTL_FMDB|IIC_MDCNTL_FSDB)); + out_8(IIC_MDCNTL1, ((in_8(IIC_MDCNTL1))|IIC_MDCNTL_FMDB|IIC_MDCNTL_FSDB)); /*need to wait 4 OPB clocks? code below should take that long*/ /* 7-bit adressing */ - out8(IIC_HMADR1,0); - out8(IIC_LMADR1, chip); + out_8(IIC_HMADR1,0); + out_8(IIC_LMADR1, chip); __asm__ volatile("eieio"); tran = 0; @@ -280,11 +283,11 @@ int i2c_transfer1(unsigned char cmd_type, else { for(j=0; j<bc; j++) { /* Set buffer */ - out8(IIC_MDBUF1,ptr[tran+j]); + out_8(IIC_MDBUF1,ptr[tran+j]); __asm__ volatile("eieio"); } } - out8(IIC_CNTL1, creg ); + out_8(IIC_CNTL1, creg ); __asm__ volatile("eieio"); /* Transfer is in progress @@ -297,7 +300,7 @@ int i2c_transfer1(unsigned char cmd_type, i=2*5*8; do { /* Get status */ - status = in8(IIC_STS1); + status = in_8(IIC_STS1); __asm__ volatile("eieio"); udelay (10); i--; @@ -306,7 +309,7 @@ int i2c_transfer1(unsigned char cmd_type, if (status & IIC_STS_ERR) { result = IIC_NOK; - status = in8 (IIC_EXTSTS1); + status = in_8 (IIC_EXTSTS1); /* Lost arbitration? */ if (status & IIC_EXTSTS_LA) result = IIC_NOK_LA; @@ -331,7 +334,7 @@ int i2c_transfer1(unsigned char cmd_type, */ udelay (1); for(j=0;j<bc;j++) { - ptr[tran+j] = in8(IIC_MDBUF1); + ptr[tran+j] = in_8(IIC_MDBUF1); __asm__ volatile("eieio"); } } else |