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Subject[RFC ADD HYPERVISOR CALL SUPPORT 2/2] remoteproc: qcom: Add mss rproc support for msm8996.
Date
This patch add msm8996 specific code piece to
take mss out of reset.

Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
---
.../devicetree/bindings/remoteproc/qcom,q6v5.txt | 2 +-
drivers/remoteproc/qcom_q6v5_pil.c | 179 ++++++++++++++++++---
2 files changed, 155 insertions(+), 26 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
index 674ebc6..7217647 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
@@ -10,7 +10,7 @@ on the Qualcomm Hexagon core.
"qcom,q6v5-pil"
"qcom,msm8916-mss-pil"
"qcom,msm8974-mss-pil"
-
+ "qcom,msm8996-mss-pil"
- reg:
Usage: required
Value type: <prop-encoded-array>
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index cbf833c..c512c1d 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -31,6 +31,7 @@
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
#include <linux/of_device.h>
+#include <linux/iopoll.h>
#include <soc/qcom/secure_buffer.h>

#include "remoteproc_internal.h"
@@ -66,6 +67,8 @@
#define QDSP6SS_RESET_REG 0x014
#define QDSP6SS_GFMUX_CTL_REG 0x020
#define QDSP6SS_PWR_CTL_REG 0x030
+#define QDSP6SS_MEM_PWR_CTL 0x0B0
+#define QDSP6SS_STRAP_ACC 0x110

/* AXI Halt Register Offsets */
#define AXI_HALTREQ_REG 0x0
@@ -94,6 +97,15 @@
#define QDSS_BHS_ON BIT(21)
#define QDSS_LDO_BYP BIT(22)

+/* QDSP6v56 parameters */
+#define QDSP6v56_LDO_BYP BIT(25)
+#define QDSP6v56_BHS_ON BIT(24)
+#define QDSP6v56_CLAMP_WL BIT(21)
+#define QDSP6v56_CLAMP_QMC_MEM BIT(22)
+#define HALT_CHECK_MAX_LOOPS 200
+#define QDSP6SS_XO_CBCR 0x0038
+#define QDSP6SS_ACC_OVERRIDE_VAL 0x20
+
struct reg_info {
struct regulator *reg;
int uV;
@@ -385,35 +397,99 @@ static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)

static int q6v5proc_reset(struct q6v5 *qproc)
{
- u32 val;
+ u64 val;
int ret;
+ int i;

- /* Assert resets, stop core */
- val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
- val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);
- writel(val, qproc->reg_base + QDSP6SS_RESET_REG);

- /* Enable power block headswitch, and wait for it to stabilize */
- val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- val |= QDSS_BHS_ON | QDSS_LDO_BYP;
- writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- udelay(1);
-
- /*
- * Turn on memories. L2 banks should be done individually
- * to minimize inrush current.
- */
- val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- val |= Q6SS_SLP_RET_N | Q6SS_L2TAG_SLP_NRET_N |
- Q6SS_ETB_SLP_NRET_N | Q6SS_L2DATA_STBY_N;
- writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- val |= Q6SS_L2DATA_SLP_NRET_N_2;
- writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- val |= Q6SS_L2DATA_SLP_NRET_N_1;
- writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
- val |= Q6SS_L2DATA_SLP_NRET_N_0;
- writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ if (qproc->version == MSS_MSM8996) {
+ /* Override the ACC value if required */
+ writel(QDSP6SS_ACC_OVERRIDE_VAL,
+ qproc->reg_base + QDSP6SS_STRAP_ACC);
+
+ /* Assert resets, stop core */
+ val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+ val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);
+ writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+ /* BHS require xo cbcr to be enabled */
+ val = readl(qproc->reg_base + QDSP6SS_XO_CBCR);
+ val |= 0x1;
+ writel(val, qproc->reg_base + QDSP6SS_XO_CBCR);

+ /* Read CLKOFF bit to go low indicating CLK is enabled */
+ ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_XO_CBCR,
+ val, !(val & BIT(31)), 1, HALT_CHECK_MAX_LOOPS);
+ if (ret) {
+ dev_err(qproc->dev,
+ "xo cbcr enabling timed out (rc:%d)\n", ret);
+ return ret;
+ }
+ /* Enable power block headswitch and wait for it to stabilize */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= QDSP6v56_BHS_ON;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ udelay(1);
+
+ /* Put LDO in bypass mode */
+ val |= QDSP6v56_LDO_BYP;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* Deassert QDSP6 compiler memory clamp */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val &= ~QDSP6v56_CLAMP_QMC_MEM;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* Deassert memory peripheral sleep and L2 memory standby */
+ val |= (Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N);
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* Turn on L1, L2, ETB and JU memories 1 at a time */
+ val = readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+ for (i = 19; i >= 0; i--) {
+ val |= BIT(i);
+ writel(val, qproc->reg_base +
+ QDSP6SS_MEM_PWR_CTL);
+ /*
+ * Read back value to ensure the write is done then
+ * wait for 1us for both memory peripheral and data
+ * array to turn on.
+ */
+ val |= readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+ udelay(1);
+ }
+ /* Remove word line clamp */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val &= ~QDSP6v56_CLAMP_WL;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ } else {
+ /* Assert resets, stop core */
+ val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+ val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE);
+ writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+ /* Enable power block headswitch and wait for it to stabilize */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= QDSS_BHS_ON | QDSS_LDO_BYP;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ udelay(1);
+ /*
+ * Turn on memories. L2 banks should be done individually
+ * to minimize inrush current.
+ */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_SLP_RET_N | Q6SS_L2TAG_SLP_NRET_N |
+ Q6SS_ETB_SLP_NRET_N | Q6SS_L2DATA_STBY_N;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_L2DATA_SLP_NRET_N_2;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_L2DATA_SLP_NRET_N_1;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_L2DATA_SLP_NRET_N_0;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ }
/* Remove IO clamp */
val &= ~Q6SS_CLAMP_IO;
writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
@@ -739,6 +815,7 @@ static int q6v5_stop(struct rproc *rproc)
{
struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
int ret;
+ int val;

qproc->running = false;

@@ -756,6 +833,15 @@ static int q6v5_stop(struct rproc *rproc)
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);

+ if (qproc->version == MSS_MSM8996) {
+ /*
+ * To avoid high MX current during LPASS/MSS restart.
+ */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_CLAMP_IO | QDSP6v56_CLAMP_WL |
+ QDSP6v56_CLAMP_QMC_MEM;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ }
reset_control_assert(qproc->mss_restart);
q6v5_clk_disable(qproc->dev, qproc->active_clks,
qproc->active_clk_count);
@@ -1103,6 +1189,47 @@ static int q6v5_remove(struct platform_device *pdev)
return 0;
}

+static const struct rproc_hexagon_res msm8996_mss = {
+ .hexagon_mba_image = "mba.mbn",
+ .proxy_supply = (struct qcom_mss_reg_res[]) {
+ {
+ .supply = "vdd_mx",
+ .uV = 6,
+ },
+ {
+ .supply = "vdd_cx",
+ .uV = 7,
+ .uA = 100000,
+ },
+ {
+ .supply = "vdd_pll",
+ .uV = 1800000,
+ .uA = 100000,
+ },
+ {}
+ },
+ .active_supply = (struct qcom_mss_reg_res[]) {
+ {},
+ {}
+ },
+ .proxy_clk_names = (char*[]){
+ "xo",
+ "pnoc",
+ "qdss",
+ NULL
+ },
+ .active_clk_names = (char*[]){
+ "iface",
+ "bus",
+ "mem",
+ "gpll0_mss_clk",
+ "snoc_axi_clk",
+ "mnoc_axi_clk",
+ NULL
+ },
+ .version = MSS_MSM8996,
+};
+
static const struct rproc_hexagon_res msm8916_mss = {
.hexagon_mba_image = "mba.mbn",
.proxy_supply = (struct qcom_mss_reg_res[]) {
@@ -1178,10 +1305,12 @@ static int q6v5_remove(struct platform_device *pdev)
},
.version = MSS_MSM8974,
};
+
static const struct of_device_id q6v5_of_match[] = {
{ .compatible = "qcom,q6v5-pil", .data = &msm8916_mss},
{ .compatible = "qcom,msm8916-mss-pil", .data = &msm8916_mss},
{ .compatible = "qcom,msm8974-mss-pil", .data = &msm8974_mss},
+ { .compatible = "qcom,msm8996-mss-pil", .data = &msm8996_mss},
{ },
};
MODULE_DEVICE_TABLE(of, q6v5_of_match);
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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