[PATCH v2 5/9] remoteproc: mediatek: Add chip dependent operations for SCP core 1

[Tinghan Shen]

The SCP rproc operations has chip dependent callbacks. Implement a
version of these callbacks for MT8195 SCP core 1.

Signed-off-by: Tinghan Shen <tinghan.shen at mediatek.com>
---
 drivers/remoteproc/mtk_scp.c | 65 ++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 91b4aefde4ac..731a8094c373 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -180,6 +180,16 @@ static void mt8192_scp_reset_deassert(struct mtk_scp *scp)
 	writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_CLR);
 }
 
+static void mt8195_scp_dual_reset_assert(struct mtk_scp *scp)
+{
+	writel(1, scp->reg_base + MT8195_CORE1_SW_RSTN_SET);
+}
+
+static void mt8195_scp_dual_reset_deassert(struct mtk_scp *scp)
+{
+	writel(1, scp->reg_base + MT8195_CORE1_SW_RSTN_CLR);
+}
+
 static void mt8183_scp_irq_handler(struct mtk_scp *scp)
 {
 	u32 scp_to_host;
@@ -241,6 +251,24 @@ static void mt8195_scp_irq_handler(struct mtk_scp *scp)
 	}
 }
 
+static void mt8195_scp_dual_irq_handler(struct mtk_scp *scp)
+{
+	u32 scp_to_host;
+
+	scp_to_host = readl(scp->reg_base + MT8195_SSHUB2APMCU_IPC_SET);
+
+	if (scp_to_host & MT8192_SCP_IPC_INT_BIT) {
+		scp_ipi_handler(scp);
+
+		/*
+		 * SCP won't send another interrupt until we clear
+		 * MT8195_SSHUB2APMCU_IPC_CLR.
+		 */
+		writel(MT8192_SCP_IPC_INT_BIT,
+		       scp->reg_base + MT8195_SSHUB2APMCU_IPC_CLR);
+	}
+}
+
 static irqreturn_t scp_irq_handler(int irq, void *priv)
 {
 	struct mtk_scp *scp = priv;
@@ -474,6 +502,21 @@ static int mt8195_scp_before_load(struct mtk_scp *scp)
 	return 0;
 }
 
+static int mt8195_scp_dual_before_load(struct mtk_scp *scp)
+{
+	u32 sec_ctrl;
+
+	scp_sram_power_on(scp->reg_base + MT8195_CPU1_SRAM_PD, 0);
+
+	/* hold SCP in reset while loading FW. */
+	scp->data->scp_reset_assert(scp);
+
+	/* enable MPU for all memory regions */
+	writel(0xff, scp->reg_base + MT8195_CORE1_MEM_ATT_PREDEF);
+
+	return 0;
+}
+
 static int scp_load(struct rproc *rproc, const struct firmware *fw)
 {
 	struct mtk_scp *scp = rproc->priv;
@@ -646,6 +689,15 @@ static void mt8195_scp_stop(struct mtk_scp *scp)
 	writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG);
 }
 
+static void mt8195_scp_dual_stop(struct mtk_scp *scp)
+{
+	/* Power off CPU SRAM */
+	scp_sram_power_off(scp->reg_base + MT8195_CPU1_SRAM_PD, 0);
+
+	/* Disable SCP watchdog */
+	writel(0, scp->reg_base + MT8195_CORE1_WDT_CFG);
+}
+
 static int scp_stop(struct rproc *rproc)
 {
 	struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
@@ -1013,11 +1065,24 @@ static const struct mtk_scp_of_data mt8195_of_data = {
 	.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
 };
 
+static const struct mtk_scp_of_data mt8195_scp_dual_of_data = {
+	.scp_clk_get = mt8195_scp_clk_get,
+	.scp_before_load = mt8195_scp_dual_before_load,
+	.scp_irq_handler = mt8195_scp_dual_irq_handler,
+	.scp_reset_assert = mt8195_scp_dual_reset_assert,
+	.scp_reset_deassert = mt8195_scp_dual_reset_deassert,
+	.scp_stop = mt8195_scp_dual_stop,
+	.scp_da_to_va = mt8192_scp_da_to_va,
+	.host_to_scp_reg = MT8192_GIPC_IN_SET,
+	.host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT,
+};
+
 static const struct of_device_id mtk_scp_of_match[] = {
 	{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
 	{ .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data },
 	{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
 	{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
+	{ .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_scp_dual_of_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
-- 
2.18.0