fby3.5: hd: Support IPMB

Summary:
- Support IPMB handler.

Test plan:
- Build code: Pass
- Check IPMB is workable: Pass

LOG:
```
root@bmc-oob:~# bic-util slot1 0x18 0x1
00 80 FF FF 02 BF 15 A0 00 00 00 00 00 00 00
```

meta-facebook/yv35-hd/src/platform/plat_i2c.h

@@ -20,6 +20,7 @@
 #define I2C_BUS13 12
 #define I2C_BUS14 13
 
+#define IPMB_I2C_BMC I2C_BUS7
 #define I2C_BUS_MAX_NUM 14
 
 #endif

meta-facebook/yv35-hd/src/platform/plat_ipmb.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <string.h>
+#include "plat_ipmb.h"
+
+IPMB_config pal_IPMB_config_table[] = {
+	// index, interface, channel, bus, channel_target_address, enable_status, self_address,
+	// rx_thread_name, tx_thread_name
+	{ BMC_IPMB_IDX, I2C_IF, BMC_IPMB, IPMB_I2C_BMC, BMC_I2C_ADDRESS, ENABLE, SELF_I2C_ADDRESS,
+	  "RX_BMC_IPMB_TASK", "TX_BMC_IPMB_TASK" },
+	{ EXP1_IPMB_IDX, I2C_IF, EXP1_IPMB, IPMB_EXP1_BUS, BIC1_I2C_ADDRESS, DISABLE,
+	  SELF_I2C_ADDRESS, "RX_EPX1_IPMB_TASK", "TX_EXP1_IPMB_TASK" },
+	{ EXP2_IPMB_IDX, I2C_IF, EXP2_IPMB, IPMB_EXP2_BUS, BIC2_I2C_ADDRESS, DISABLE,
+	  SELF_I2C_ADDRESS, "RX_EPX2_IPMB_TASK", "TX_EXP2_IPMB_TASK" },
+	{ RESERVED_IDX, RESERVED_IF, RESERVED, RESERVED_BUS, RESERVED_ADDRESS, DISABLE,
+	  RESERVED_ADDRESS, "RESERVED_ATTR", "RESERVED_ATTR" },
+};
+
+bool pal_load_ipmb_config(void)
+{
+	memcpy(IPMB_config_table, pal_IPMB_config_table, sizeof(pal_IPMB_config_table));
+	return true;
+}

meta-facebook/yv35-hd/src/platform/plat_ipmb.h

@@ -4,8 +4,20 @@
 #include "plat_i2c.h"
 #include "ipmb.h"
 
+#define IPMB_BMC_BUS I2C_BUS7
+#define IPMB_EXP1_BUS I2C_BUS8
+#define IPMB_EXP2_BUS I2C_BUS9
+
+#define BMC_I2C_ADDRESS 0x10
 #define SELF_I2C_ADDRESS 0x20
-#define MAX_IPMB_IDX 2
+#define BIC1_I2C_ADDRESS 0x20
+#define BIC2_I2C_ADDRESS 0x20
+#define MAX_IPMB_IDX 4
+
+enum { BMC_IPMB_IDX,
+       EXP1_IPMB_IDX,
+       EXP2_IPMB_IDX,
+};
 
 extern IPMB_config pal_IPMB_config_table[];
 #endif