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>
qemu · Sep 1, 2023 · acc3d20 · acc3d20
1 parent 961faf3
commit acc3d20
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diff --git 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
@@ -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)