hw/i2c/aspeed: Add support for buffer organization

Added support for the buffer organization option in pool buffer control
register.when set to 1,The buffer is split into two parts: Lower 16 bytes
for Tx and higher 16 bytes for Rx.

Signed-off-by: Hang Yu <francis_yuu@stu.pku.edu.cn>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[ clg: checkpatch fixes ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>

diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index 44905d789998662bd7b1942b4adf4d4da89cb82f..7275d40749a9063687e10b1f245a435375c6e614 100644 (file)
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -297,6 +297,10 @@ static void aspeed_i2c_bus_recv(AspeedI2CBus *bus)
 
     if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) {
         uint8_t *pool_base = aic->bus_pool_base(bus);
+        if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl,
+                                    BUF_ORGANIZATION)) {
+            pool_base += 16;
+        }
 
         for (i = 0; i < pool_rx_count; i++) {
             pool_base[i] = i2c_recv(bus->bus);

diff --git a/include/hw/i2c/aspeed_i2c.h b/include/hw/i2c/aspeed_i2c.h
index 2e1e15aaf0f7a964a9dc0294db2d13dba2970170..a064479e599c29f679dd39ef649ef7d204572ee7 100644 (file)
--- a/include/hw/i2c/aspeed_i2c.h
+++ b/include/hw/i2c/aspeed_i2c.h
@@ -143,6 +143,7 @@ REG32(I2CD_POOL_CTRL, 0x1C) /* Pool Buffer Control */
     SHARED_FIELD(RX_SIZE, 16, 5)
     SHARED_FIELD(TX_COUNT, 8, 5)
     FIELD(I2CD_POOL_CTRL, OFFSET, 2, 6) /* AST2400 */
+    SHARED_FIELD(BUF_ORGANIZATION, 0, 1) /* AST2600 */
 REG32(I2CD_BYTE_BUF, 0x20) /* Transmit/Receive Byte Buffer */
     SHARED_FIELD(RX_BUF, 8, 8)
     SHARED_FIELD(TX_BUF, 0, 8)