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hw/i2c/aspeed: Add support for buffer organization

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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>
This commit is contained in:
Hang Yu 2023-08-12 14:52:30 +08:00 committed by Cédric Le Goater
parent 961faf3ddb
commit acc3d20ab2
2 changed files with 5 additions and 0 deletions
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4
hw/i2c/aspeed_i2c.c
View File

@ -297,6 +297,10 @@ static void aspeed_i2c_bus_recv(AspeedI2CBus *bus)
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) { if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) {
uint8_t *pool_base = aic->bus_pool_base(bus); 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++) { for (i = 0; i < pool_rx_count; i++) {
pool_base[i] = i2c_recv(bus->bus); pool_base[i] = i2c_recv(bus->bus);

1
include/hw/i2c/aspeed_i2c.h
View File

@ -143,6 +143,7 @@ REG32(I2CD_POOL_CTRL, 0x1C) /* Pool Buffer Control */
SHARED_FIELD(RX_SIZE, 16, 5) SHARED_FIELD(RX_SIZE, 16, 5)
SHARED_FIELD(TX_COUNT, 8, 5) SHARED_FIELD(TX_COUNT, 8, 5)
FIELD(I2CD_POOL_CTRL, OFFSET, 2, 6) /* AST2400 */ FIELD(I2CD_POOL_CTRL, OFFSET, 2, 6) /* AST2400 */
SHARED_FIELD(BUF_ORGANIZATION, 0, 1) /* AST2600 */
REG32(I2CD_BYTE_BUF, 0x20) /* Transmit/Receive Byte Buffer */ REG32(I2CD_BYTE_BUF, 0x20) /* Transmit/Receive Byte Buffer */
SHARED_FIELD(RX_BUF, 8, 8) SHARED_FIELD(RX_BUF, 8, 8)
SHARED_FIELD(TX_BUF, 0, 8) SHARED_FIELD(TX_BUF, 0, 8)