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[PULL,04/26] hw/i2c/aspeed: Add support for buffer organization

Message ID 20230901094214.296918-5-clg@kaod.org
State New
Headers show
Series [PULL,01/26] aspeed: Introduce helper for 32-bit hosts limitation | expand

Commit Message

Cédric Le Goater Sept. 1, 2023, 9:41 a.m. UTC 
From: Hang Yu <francis_yuu@stu.pku.edu.cn>

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>
---
 include/hw/i2c/aspeed_i2c.h | 1 +
 hw/i2c/aspeed_i2c.c         | 4 ++++
 2 files changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/include/hw/i2c/aspeed_i2c.h b/include/hw/i2c/aspeed_i2c.h
index 2e1e15aaf0f7..a064479e599c 100644
--- 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)
diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index 44905d789998..7275d40749a9 100644
--- 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);