[PATCH v2 1/5] media: venus: add a routine to reset ARM9

Vikash Garodia
2018-06-01T20:26:04Z

Add a new routine to reset the ARM9 and brings it
out of reset. This is in preparation to add PIL
functionality in venus driver.

Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
---
drivers/media/platform/qcom/venus/firmware.c | 26 ++++++++++++++++++++++++
drivers/media/platform/qcom/venus/hfi_venus_io.h | 5 +++++
2 files changed, 31 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 521d4b3..7d89b5a 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -14,6 +14,7 @@

#include <linux/device.h>
#include <linux/firmware.h>
+#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
@@ -22,11 +23,36 @@
#include <linux/sizes.h>
#include <linux/soc/qcom/mdt_loader.h>

+#include "core.h"
#include "firmware.h"
+#include "hfi_venus_io.h"

#define VENUS_PAS_ID 9
#define VENUS_FW_MEM_SIZE (6 * SZ_1M)

+static void venus_reset_hw(struct venus_core *core)
+{
+ void __iomem *reg_base = core->base;
+
+ writel(0, reg_base + WRAPPER_FW_START_ADDR);
+ writel(VENUS_FW_MEM_SIZE, reg_base + WRAPPER_FW_END_ADDR);
+ writel(0, reg_base + WRAPPER_CPA_START_ADDR);
+ writel(VENUS_FW_MEM_SIZE, reg_base + WRAPPER_CPA_END_ADDR);
+ writel(0x0, reg_base + WRAPPER_CPU_CGC_DIS);
+ writel(0x0, reg_base + WRAPPER_CPU_CLOCK_CONFIG);
+
+ /* Make sure all register writes are committed. */
+ mb();
+
+ /*
+ * Need to wait 10 cycles of internal clocks before bringing ARM9
+ * out of reset.
+ */
+ udelay(1);
+
+ /* Bring Arm9 out of reset */
+ writel_relaxed(0, reg_base + WRAPPER_A9SS_SW_RESET);
+}
int venus_boot(struct device *dev, const char *fwname)
{
const struct firmware *mdt;
diff --git a/drivers/media/platform/qcom/venus/hfi_venus_io.h b/drivers/media/platform/qcom/venus/hfi_venus_io.h
index 76f4793..39afa5d 100644
--- a/drivers/media/platform/qcom/venus/hfi_venus_io.h
+++ b/drivers/media/platform/qcom/venus/hfi_venus_io.h
@@ -109,6 +109,11 @@
#define WRAPPER_CPU_CGC_DIS (WRAPPER_BASE + 0x2010)
#define WRAPPER_CPU_STATUS (WRAPPER_BASE + 0x2014)
#define WRAPPER_SW_RESET (WRAPPER_BASE + 0x3000)
+#define WRAPPER_CPA_START_ADDR (WRAPPER_BASE + 0x1020)
+#define WRAPPER_CPA_END_ADDR (WRAPPER_BASE + 0x1024)
+#define WRAPPER_FW_START_ADDR (WRAPPER_BASE + 0x1028)
+#define WRAPPER_FW_END_ADDR (WRAPPER_BASE + 0x102C)
+#define WRAPPER_A9SS_SW_RESET (WRAPPER_BASE + 0x3000)

/* Venus 4xx */
#define WRAPPER_VCODEC0_MMCC_POWER_STATUS (WRAPPER_BASE + 0x90)
--
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