[PATCH v2 5/7] remoteproc: qcom: q6v5: Add support for q6 rmb registers

Melody Olvera
2023-03-06T23:12:33Z

When attaching a running Q6, the remoteproc driver needs a way
to communicate with the Q6 using rmb registers, so allow the
rmb register to be gotten from the device tree if present.

Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
---
drivers/remoteproc/qcom_q6v5.c | 9 +++++++++
drivers/remoteproc/qcom_q6v5.h | 8 ++++++++
2 files changed, 17 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
index 192c7aa0e39e..e8c6be70ebfd 100644
--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -254,6 +254,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
void (*handover)(struct qcom_q6v5 *q6v5))
{
int ret;
+ struct resource *res;

q6v5->rproc = rproc;
q6v5->dev = &pdev->dev;
@@ -263,6 +264,14 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
init_completion(&q6v5->start_done);
init_completion(&q6v5->stop_done);

+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res) {
+ q6v5->rmb_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(q6v5->rmb_base))
+ q6v5->rmb_base = NULL;
+ } else
+ q6v5->rmb_base = NULL;
+
q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");
if (q6v5->wdog_irq < 0)
return q6v5->wdog_irq;
diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h
index 5a859c41896e..95824d5b64ce 100644
--- a/drivers/remoteproc/qcom_q6v5.h
+++ b/drivers/remoteproc/qcom_q6v5.h
@@ -7,6 +7,12 @@
#include <linux/completion.h>
#include <linux/soc/qcom/qcom_aoss.h>

+#define RMB_BOOT_WAIT_REG 0x8
+#define RMB_BOOT_CONT_REG 0xC
+#define RMB_Q6_BOOT_STATUS_REG 0x10
+
+#define RMB_POLL_MAX_TIMES 250
+
struct icc_path;
struct rproc;
struct qcom_smem_state;
@@ -16,6 +22,8 @@ struct qcom_q6v5 {
struct device *dev;
struct rproc *rproc;

+ void __iomem *rmb_base;
+
struct qcom_smem_state *state;
struct qmp *qmp;

--
2.25.1