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Extend support of SMBUS(module pm_smbus.c) HST_STS register. 

Previous realization doesn't consider flags in the status register.
Add DS and INTR bits of HST_STS register set after transaction execution.
Update bits resetting in HST_STS register. Update error processing:
if DEV_ERR bit set transaction isn't execution.

Signed-off-by: MRatnikov <m.o.ratnikov@gmail.com>
Message-id: 1373230982-9190-1-git-send-email-m.o.ratnikov@gmail.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
MRatnikov 2013-07-08 01:03:02 +04:00 committed by Anthony Liguori
parent 02c4bdf1d2
commit edb5092c24
1 changed files with 23 additions and 2 deletions
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25
hw/i2c/pm_smbus.c
View File

@ -32,6 +32,18 @@
#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)
/* Signs of successfully transaction end :
* ByteDoneStatus = 1 (STS_BYTE_DONE) and INTR = 1 (STS_INTR )
*/
//#define DEBUG
#ifdef DEBUG
@ -50,9 +62,14 @@ static void smb_transaction(PMSMBus *s)
i2c_bus *bus = s->smbus;
SMBUS_DPRINTF("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
/* Transaction isn't exec if STS_DEV_ERR bit set */
if ((s->smb_stat & STS_DEV_ERR) != 0) {
goto error;
}
switch(prot) {
case 0x0:
smbus_quick_command(bus, addr, read);
s->smb_stat |= STS_BYTE_DONE | STS_INTR;
break;
case 0x1:
if (read) {
@ -60,6 +77,7 @@ static void smb_transaction(PMSMBus *s)
} else {
smbus_send_byte(bus, addr, cmd);
}
s->smb_stat |= STS_BYTE_DONE | STS_INTR;
break;
case 0x2:
if (read) {
@ -67,6 +85,7 @@ static void smb_transaction(PMSMBus *s)
} else {
smbus_write_byte(bus, addr, cmd, s->smb_data0);
}
s->smb_stat |= STS_BYTE_DONE | STS_INTR;
break;
case 0x3:
if (read) {
@ -77,6 +96,7 @@ static void smb_transaction(PMSMBus *s)
} else {
smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0);
}
s->smb_stat |= STS_BYTE_DONE | STS_INTR;
break;
case 0x5:
if (read) {
@ -84,6 +104,7 @@ static void smb_transaction(PMSMBus *s)
} else {
smbus_write_block(bus, addr, cmd, s->smb_data, s->smb_data0);
}
s->smb_stat |= STS_BYTE_DONE | STS_INTR;
break;
default:
goto error;
@ -91,7 +112,7 @@ static void smb_transaction(PMSMBus *s)
return;
error:
s->smb_stat |= 0x04;
s->smb_stat |= STS_DEV_ERR;
}
static void smb_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
@ -102,7 +123,7 @@ static void smb_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
SMBUS_DPRINTF("SMB writeb port=0x%04x val=0x%02x\n", addr, val);
switch(addr) {
case SMBHSTSTS:
s->smb_stat = 0;
s->smb_stat = (~(val & 0xff)) & s->smb_stat;
s->smb_index = 0;
break;
case SMBHSTCNT: