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[V2,7/8] spi: spi_amd: Set controller address mode

Message ID 20240925133644.2922359-8-Raju.Rangoju@amd.com
State Accepted
Commit 9674f1694e644aa5cc50e1009481cb4c5b4e8f8f
Headers show
Series spi: spi_amd: Performance Optimization Patch Series | expand

Commit Message

Raju Rangoju Sept. 25, 2024, 1:36 p.m. UTC 
Add changes to set the controller address mode before initiating commands.
The AMD SPI0 controller(AMDI0062) supports both 24-bit and 32-bit address
modes, while the HID2 SPI controller(AMDI0063) supports only the 24-bit
address mode. So this change is applicable only for SPI0 controller.

Co-developed-by: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Co-developed-by: Akshata MukundShetty <akshata.mukundshetty@amd.com>
Signed-off-by: Akshata MukundShetty <akshata.mukundshetty@amd.com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
---
 drivers/spi/spi-amd.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
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Patch

diff --git a/drivers/spi/spi-amd.c b/drivers/spi/spi-amd.c
index f146366a67e7..50dfdf2ab6ee 100644
--- a/drivers/spi/spi-amd.c
+++ b/drivers/spi/spi-amd.c
@@ -34,6 +34,7 @@ 
 #define AMD_SPI_TX_COUNT_REG	0x48
 #define AMD_SPI_RX_COUNT_REG	0x4B
 #define AMD_SPI_STATUS_REG	0x4C
+#define AMD_SPI_ADDR32CTRL_REG	0x50
 
 #define AMD_SPI_FIFO_SIZE	70
 #define AMD_SPI_MEM_SIZE	200
@@ -548,6 +549,17 @@  static void amd_spi_mem_data_in(struct amd_spi *amd_spi,
 					  nbytes + i - left_data);
 }
 
+static void amd_set_spi_addr_mode(struct amd_spi *amd_spi,
+				  const struct spi_mem_op *op)
+{
+	u32 val = amd_spi_readreg32(amd_spi, AMD_SPI_ADDR32CTRL_REG);
+
+	if (amd_is_spi_read_cmd_4b(op->cmd.opcode))
+		amd_spi_writereg32(amd_spi, AMD_SPI_ADDR32CTRL_REG, val | BIT(0));
+	else
+		amd_spi_writereg32(amd_spi, AMD_SPI_ADDR32CTRL_REG, val & ~BIT(0));
+}
+
 static int amd_spi_exec_mem_op(struct spi_mem *mem,
 			       const struct spi_mem_op *op)
 {
@@ -560,6 +572,9 @@  static int amd_spi_exec_mem_op(struct spi_mem *mem,
 	if (ret)
 		return ret;
 
+	if (amd_spi->version == AMD_SPI_V2)
+		amd_set_spi_addr_mode(amd_spi, op);
+
 	switch (op->data.dir) {
 	case SPI_MEM_DATA_IN:
 		amd_spi_mem_data_in(amd_spi, op);