diff options
Diffstat (limited to 'hw/i2c')
| -rw-r--r-- | hw/i2c/pm_smbus.c | 58 |
1 files changed, 38 insertions, 20 deletions
diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c index 0d26e0f6b5..83c2377bb4 100644 --- a/hw/i2c/pm_smbus.c +++ b/hw/i2c/pm_smbus.c @@ -22,8 +22,6 @@ #include "hw/i2c/pm_smbus.h" #include "hw/i2c/smbus.h" -/* no save/load? */ - #define SMBHSTSTS 0x00 #define SMBHSTCNT 0x02 #define SMBHSTCMD 0x03 @@ -32,19 +30,34 @@ #define SMBHSTDAT1 0x06 #define SMBBLKDAT 0x07 -#define STS_HOST_BUSY (1) -#define STS_INTR (1<<1) -#define STS_DEV_ERR (1<<2) -#define STS_BUS_ERR (1<<3) -#define STS_FAILED (1<<4) -#define STS_SMBALERT (1<<5) -#define STS_INUSE_STS (1<<6) -#define STS_BYTE_DONE (1<<7) +#define STS_HOST_BUSY (1 << 0) +#define STS_INTR (1 << 1) +#define STS_DEV_ERR (1 << 2) +#define STS_BUS_ERR (1 << 3) +#define STS_FAILED (1 << 4) +#define STS_SMBALERT (1 << 5) +#define STS_INUSE_STS (1 << 6) +#define STS_BYTE_DONE (1 << 7) /* Signs of successfully transaction end : * ByteDoneStatus = 1 (STS_BYTE_DONE) and INTR = 1 (STS_INTR ) */ -//#define DEBUG +#define CTL_INTREN (1 << 0) +#define CTL_KILL (1 << 1) +#define CTL_LAST_BYTE (1 << 5) +#define CTL_START (1 << 6) +#define CTL_PEC_EN (1 << 7) +#define CTL_RETURN_MASK 0x1f + +#define PROT_QUICK 0 +#define PROT_BYTE 1 +#define PROT_BYTE_DATA 2 +#define PROT_WORD_DATA 3 +#define PROT_PROC_CALL 4 +#define PROT_BLOCK_DATA 5 +#define PROT_I2C_BLOCK_DATA 6 + +/*#define DEBUG*/ #ifdef DEBUG # define SMBUS_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) @@ -70,11 +83,12 @@ static void smb_transaction(PMSMBus *s) if ((s->smb_stat & STS_DEV_ERR) != 0) { goto error; } + switch(prot) { - case 0x0: + case PROT_QUICK: ret = smbus_quick_command(bus, addr, read); goto done; - case 0x1: + case PROT_BYTE: if (read) { ret = smbus_receive_byte(bus, addr); goto data8; @@ -82,7 +96,7 @@ static void smb_transaction(PMSMBus *s) ret = smbus_send_byte(bus, addr, cmd); goto done; } - case 0x2: + case PROT_BYTE_DATA: if (read) { ret = smbus_read_byte(bus, addr, cmd); goto data8; @@ -91,16 +105,17 @@ static void smb_transaction(PMSMBus *s) goto done; } break; - case 0x3: + case PROT_WORD_DATA: if (read) { ret = smbus_read_word(bus, addr, cmd); goto data16; } else { - ret = smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0); + ret = smbus_write_word(bus, addr, cmd, + (s->smb_data1 << 8) | s->smb_data0); goto done; } break; - case 0x5: + case PROT_I2C_BLOCK_DATA: if (read) { ret = smbus_read_block(bus, addr, cmd, s->smb_data); goto data8; @@ -158,8 +173,9 @@ static void smb_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, break; case SMBHSTCNT: s->smb_ctl = val; - if (val & 0x40) + if (s->smb_ctl & CTL_START) { smb_transaction_start(s); + } break; case SMBHSTCMD: s->smb_cmd = val; @@ -198,7 +214,7 @@ static uint64_t smb_ioport_readb(void *opaque, hwaddr addr, unsigned width) break; case SMBHSTCNT: s->smb_index = 0; - val = s->smb_ctl & 0x1f; + val = s->smb_ctl & CTL_RETURN_MASK; break; case SMBHSTCMD: val = s->smb_cmd; @@ -221,7 +237,9 @@ static uint64_t smb_ioport_readb(void *opaque, hwaddr addr, unsigned width) val = 0; break; } - SMBUS_DPRINTF("SMB readb port=0x%04" HWADDR_PRIx " val=0x%02x\n", addr, val); + SMBUS_DPRINTF("SMB readb port=0x%04" HWADDR_PRIx " val=0x%02x\n", + addr, val); + return val; } |