[PATCH v3 1/3] remoteproc: mediatek: Support platform reg offsets in mtk_scp_of_data

[Huayu Zong]

Some platforms only differ in HW register offsets, but can share
the same API. Refine struct mtk_scp_of_data to allow setting HW
register offsets via platform data, enabling better code reuse
and easier support for new platforms.

Signed-off-by: Huayu Zong <huayu.zong at mediatek.com>
---
 drivers/remoteproc/mtk_common.h |  5 +++++
 drivers/remoteproc/mtk_scp.c    | 18 ++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index fd5c539ab2ac..d45480ad332e 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -112,6 +112,11 @@ struct mtk_scp_of_data {
 
 	u32 host_to_scp_reg;
 	u32 host_to_scp_int_bit;
+	u32 scp_to_host_ipc_clr_reg;
+	u32 scp_to_spm_ipc_clr_reg;
+
+	u32 scp_secure_domain_reg;
+	u32 scp_domain_value;
 
 	size_t ipi_buf_offset;
 	const struct mtk_scp_sizes_data *scp_sizes;
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 10e3f9eb8cd2..c3c37cae933a 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -236,7 +236,7 @@ static void mt8192_scp_irq_handler(struct mtk_scp *scp)
 		 * MT8192_SCP2APMCU_IPC.
 		 */
 		writel(MT8192_SCP_IPC_INT_BIT,
-		       scp->cluster->reg_base + MT8192_SCP2APMCU_IPC_CLR);
+		       scp->cluster->reg_base + scp->data->scp_to_host_ipc_clr_reg);
 	} else {
 		scp_wdt_handler(scp, scp_to_host);
 		writel(1, scp->cluster->reg_base + MT8192_CORE0_WDT_IRQ);
@@ -561,7 +561,7 @@ static int mt8188_scp_c1_before_load(struct mtk_scp *scp)
 static int mt8192_scp_before_load(struct mtk_scp *scp)
 {
 	/* clear SPM interrupt, SCP2SPM_IPC_CLR */
-	writel(0xff, scp->cluster->reg_base + MT8192_SCP2SPM_IPC_CLR);
+	writel(0xff, scp->cluster->reg_base + scp->data->scp_to_spm_ipc_clr_reg);
 
 	writel(1, scp->cluster->reg_base + MT8192_CORE0_SW_RSTN_SET);
 
@@ -575,6 +575,18 @@ static int mt8192_scp_before_load(struct mtk_scp *scp)
 	/* enable MPU for all memory regions */
 	writel(0xff, scp->cluster->reg_base + MT8192_CORE0_MEM_ATT_PREDEF);
 
+	/* Set the domain of master in SCP.
+	 *
+	 * In the SCP, cores, DMA, and SPI are masters. When these masters
+	 * access memory or devices, they need to carry a domain ID. This
+	 * domain ID is used to determine whether they have permission to
+	 * access the target device or memory.
+	 */
+
+	if (scp->data->scp_secure_domain_reg)
+		writel(scp->data->scp_domain_value,
+		       scp->cluster->reg_base + scp->data->scp_secure_domain_reg);
+
 	return 0;
 }
 
@@ -1527,6 +1539,8 @@ static const struct mtk_scp_of_data mt8192_of_data = {
 	.scp_da_to_va = mt8192_scp_da_to_va,
 	.host_to_scp_reg = MT8192_GIPC_IN_SET,
 	.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
+	.scp_to_host_ipc_clr_reg = MT8192_SCP2APMCU_IPC_CLR,
+	.scp_to_spm_ipc_clr_reg = MT8192_SCP2SPM_IPC_CLR,
 	.scp_sizes = &default_scp_sizes,
 };
 
-- 
2.45.2