[RFC PATCH v2 2/6] hw/i2c/aspeed: add DEV_ADDR in old register mode

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

Add support for writing and reading the device address register in old
register mode.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/i2c/aspeed_i2c.c         | 5 +++--
 include/hw/i2c/aspeed_i2c.h | 8 ++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index 576425898b09..5a7eb5579b01 100644
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -104,6 +104,7 @@ static uint64_t aspeed_i2c_bus_old_read(AspeedI2CBus *bus, hwaddr offset,
     case A_I2CD_AC_TIMING2:
     case A_I2CD_INTR_CTRL:
     case A_I2CD_INTR_STS:
+    case A_I2CD_DEV_ADDR:
     case A_I2CD_POOL_CTRL:
     case A_I2CD_BYTE_BUF:
         /* Value is already set, don't do anything. */
@@ -741,8 +742,7 @@ static void aspeed_i2c_bus_old_write(AspeedI2CBus *bus, hwaddr offset,
         }
         break;
     case A_I2CD_DEV_ADDR:
-        qemu_log_mask(LOG_UNIMP, "%s: slave mode not implemented\n",
-                      __func__);
+        bus->regs[R_I2CD_DEV_ADDR] = value;
         break;
     case A_I2CD_POOL_CTRL:
         bus->regs[R_I2CD_POOL_CTRL] &= ~0xffffff;
@@ -1060,6 +1060,7 @@ static void aspeed_i2c_bus_reset(DeviceState *dev)
 
     s->regs[R_I2CD_INTR_CTRL] = 0;
     s->regs[R_I2CD_INTR_STS] = 0;
+    s->regs[R_I2CD_DEV_ADDR] = 0;
     s->regs[R_I2CD_CMD] = 0;
     s->regs[R_I2CD_BYTE_BUF] = 0;
     s->regs[R_I2CD_DMA_ADDR] = 0;
diff --git a/include/hw/i2c/aspeed_i2c.h b/include/hw/i2c/aspeed_i2c.h
index 79c6779c6c1e..03fe829a3a57 100644
--- a/include/hw/i2c/aspeed_i2c.h
+++ b/include/hw/i2c/aspeed_i2c.h
@@ -297,6 +297,14 @@ static inline uint32_t aspeed_i2c_bus_cmd_offset(AspeedI2CBus *bus)
     return R_I2CD_CMD;
 }
 
+static inline uint32_t aspeed_i2c_bus_dev_addr_offset(AspeedI2CBus *bus)
+{
+    if (aspeed_i2c_is_new_mode(bus->controller)) {
+        return R_I2CS_DEV_ADDR;
+    }
+    return R_I2CD_DEV_ADDR;
+}
+
 static inline uint32_t aspeed_i2c_bus_intr_ctrl_offset(AspeedI2CBus *bus)
 {
     if (aspeed_i2c_is_new_mode(bus->controller)) {
-- 
2.36.1