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129 lines
2.8 KiB
129 lines
2.8 KiB
/*
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* 0 single
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* 1 smb block
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*/
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int tgt_i2cread(int type,unsigned char *addr,int addrlen,unsigned char reg,unsigned char *buf,int count)
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{
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int i;
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int device,offset;
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char c;
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device=addr[0];
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offset=reg;
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device |= 1;
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memset(buf,-1,count);
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switch(type&0xff)
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{
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case I2C_SINGLE:
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for(i=0;i<count;i++)
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{
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linux_outb(device,SMBUS_HOST_ADDRESS);
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linux_outb(offset+i,SMBUS_HOST_COMMAND);
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linux_outb(0x8,SMBUS_HOST_CONTROL);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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linux_outb(linux_inb(SMBUS_HOST_CONTROL)|0x40,SMBUS_HOST_CONTROL);
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while(linux_inb(SMBUS_HOST_STATUS)&SMBUS_HOST_STATUS_BUSY);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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buf[i]=linux_inb(SMBUS_HOST_DATA0);
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}
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break;
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case I2C_SMB_BLOCK:
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linux_outb(device,SMBUS_HOST_ADDRESS); //0xd3
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linux_outb(offset,SMBUS_HOST_COMMAND);
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linux_outb(count,SMBUS_HOST_DATA0);
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linux_outb(0x14,SMBUS_HOST_CONTROL); //0x14
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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linux_outb(linux_inb(SMBUS_HOST_CONTROL)|0x40,SMBUS_HOST_CONTROL);
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while(linux_inb(SMBUS_HOST_STATUS)&SMBUS_HOST_STATUS_BUSY);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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for(i=0;i<count;i++)
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{
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buf[i]=linux_inb(SMBUS_HOST_DATA1+1);
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}
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break;
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default: return 0;break;
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}
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return count;
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}
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int tgt_i2cwrite(int type,unsigned char *addr,int addrlen,unsigned char reg,unsigned char *buf,int count)
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{
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int i;
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int device,offset;
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char c;
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device=addr[0];
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offset=reg;
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device &= ~1;
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switch(type)
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{
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case I2C_SINGLE:
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for(i=0;i<count;i++)
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{
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linux_outb(device,SMBUS_HOST_ADDRESS);
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linux_outb(offset+i,SMBUS_HOST_COMMAND);
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linux_outb(0x8,SMBUS_HOST_CONTROL);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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linux_outb(buf[i],SMBUS_HOST_DATA0);
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linux_outb(linux_inb(SMBUS_HOST_CONTROL)|0x40,SMBUS_HOST_CONTROL);
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while(linux_inb(SMBUS_HOST_STATUS)&SMBUS_HOST_STATUS_BUSY);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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}
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break;
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case I2C_SMB_BLOCK:
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linux_outb(device,SMBUS_HOST_ADDRESS); //0xd3
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linux_outb(offset,SMBUS_HOST_COMMAND);
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linux_outb(count,SMBUS_HOST_DATA0);
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linux_outb(0x14,SMBUS_HOST_CONTROL); //0x14
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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for(i=0;i<count;i++)
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linux_outb(buf[i],SMBUS_HOST_DATA1+1);
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c=linux_inb(SMBUS_HOST_CONTROL);
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linux_outb(c|0x40,SMBUS_HOST_CONTROL);
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while(linux_inb(SMBUS_HOST_STATUS)&SMBUS_HOST_STATUS_BUSY);
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if((c=linux_inb(SMBUS_HOST_STATUS))&0x1f)
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{
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linux_outb(c,SMBUS_HOST_STATUS);
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}
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break;
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default:return -1;break;
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}
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return count;
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}
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