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Subject[PATCH v1 10/15] remoteproc: mediatek: Add chip dependent operations for SCP core 1
Date
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@mediatek.com>
---
drivers/remoteproc/mtk_common.h | 1 +
drivers/remoteproc/mtk_scp.c | 3 +-
drivers/remoteproc/mtk_scp_dual.c | 121 +++++++++++++++++++++++++++++-
3 files changed, 123 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 04f7ee590f96..7b363411ec99 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -171,4 +171,5 @@ int scp_parse_fw(struct rproc *rproc, const struct firmware *fw);
int scp_map_memory_region(struct mtk_scp *scp);
void scp_unmap_memory_region(struct mtk_scp *scp);
irqreturn_t scp_irq_handler(int irq, void *priv);
+void scp_ipi_handler(struct mtk_scp *scp);
#endif
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index c67883c28a43..55bc4e9d1a6f 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -84,7 +84,7 @@ static void scp_init_ipi_handler(void *data, unsigned int len, void *priv)
wake_up_interruptible(&scp->run.wq);
}

-static void scp_ipi_handler(struct mtk_scp *scp)
+void scp_ipi_handler(struct mtk_scp *scp)
{
struct mtk_share_obj __iomem *rcv_obj = scp->recv_buf;
struct scp_ipi_desc *ipi_desc = scp->ipi_desc;
@@ -118,6 +118,7 @@ static void scp_ipi_handler(struct mtk_scp *scp)
scp->ipi_id_ack[id] = true;
wake_up(&scp->ack_wq);
}
+EXPORT_SYMBOL_GPL(scp_ipi_handler);

static int scp_elf_read_ipi_buf_addr(struct mtk_scp *scp,
const struct firmware *fw,
diff --git a/drivers/remoteproc/mtk_scp_dual.c b/drivers/remoteproc/mtk_scp_dual.c
index d4cc15e22640..16cf9d2628c8 100644
--- a/drivers/remoteproc/mtk_scp_dual.c
+++ b/drivers/remoteproc/mtk_scp_dual.c
@@ -12,6 +12,124 @@
#include "mtk_common.h"
#include "remoteproc_internal.h"

+static void mt8195_power_on_sram(void __iomem *addr)
+{
+ int i;
+
+ for (i = 31; i >= 0; i--)
+ writel(GENMASK(i, 0), addr);
+ writel(0, addr);
+}
+
+static void mt8195_power_off_sram(void __iomem *addr)
+{
+ int i;
+
+ writel(0, addr);
+ for (i = 0; i < 32; i++)
+ writel(GENMASK(i, 0), addr);
+}
+
+static int mt8195_scp_dual_before_load(struct mtk_scp *scp)
+{
+ u32 sec_ctrl;
+
+ mt8195_power_on_sram(scp->reg_base + MT8195_CPU1_SRAM_PD);
+
+ /* 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 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 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 *mt8195_scp_dual_da_to_va(struct mtk_scp *scp, u64 da, size_t len)
+{
+ int offset;
+
+ if (da >= scp->sram_phys &&
+ (da + len) <= scp->sram_phys + scp->sram_size) {
+ offset = da - scp->sram_phys;
+ return (void __force *)scp->sram_base + offset;
+ }
+
+ /* optional memory region */
+ if (scp->l1tcm_size &&
+ da >= scp->l1tcm_phys &&
+ (da + len) <= scp->l1tcm_phys + scp->l1tcm_size) {
+ offset = da - scp->l1tcm_phys;
+ return (void __force *)scp->l1tcm_base + offset;
+ }
+
+ /* optional memory region */
+ if (scp->dram_size &&
+ da >= scp->dma_addr &&
+ (da + len) <= scp->dma_addr + scp->dram_size) {
+ offset = da - scp->dma_addr;
+ return scp->cpu_addr + offset;
+ }
+
+ return NULL;
+}
+
+static void mt8195_scp_dual_stop(struct mtk_scp *scp)
+{
+ /* Power off CPU SRAM */
+ mt8195_power_off_sram(scp->reg_base + MT8195_CPU1_SRAM_PD);
+
+ /* Disable SCP watchdog */
+ writel(0, scp->reg_base + MT8195_CORE1_WDT_CFG);
+}
+
+static int mt8195_scp_dual_clk_get(struct mtk_scp *scp)
+{
+ scp->clk = NULL;
+
+ return 0;
+}
+
+static const struct mtk_scp_of_data mt8195_scp_dual_of_data = {
+ .scp_clk_get = mt8195_scp_dual_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 = mt8195_scp_dual_da_to_va,
+ .host_to_scp_reg = MT8192_GIPC_IN_SET,
+ .host_to_scp_int_bit = MT8195_HOST_IPC_INT_BIT,
+};
+
static const struct rproc_ops scp_ops = {
.start = scp_start,
.stop = scp_stop,
@@ -53,6 +171,7 @@ static int scp_dual_probe(struct platform_device *pdev)
scp = (struct mtk_scp *)rproc->priv;
scp->rproc = rproc;
scp->dev = dev;
+ scp->data = of_device_get_match_data(dev);
platform_set_drvdata(pdev, scp);

res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
@@ -125,7 +244,7 @@ static int scp_dual_remove(struct platform_device *pdev)
}

static const struct of_device_id mtk_scp_dual_of_match[] = {
- { .compatible = "mediatek,mt8195-scp-dual" },
+ { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_scp_dual_of_data },
{},
};
MODULE_DEVICE_TABLE(of, mtk_scp_dual_of_match);
--
2.18.0
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