This adds Qualcomm ADSP PIL driver support for SDM845 with ADSP bootup
and shutdown operation handled from Application Processor SubSystem(APSS).
Signed-off-by: Rohit kumar <rohitkr@xxxxxxxxxxxxxx>
Signed-off-by: RajendraBabu Medisetti <rajendrabm@xxxxxxxxxxxxxx>
Signed-off-by: Krishnamurthy Renu <krishnamurthy.renu@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/remoteproc/qcom,adsp.txt | 1 +
drivers/remoteproc/Makefile | 3 +-
drivers/remoteproc/qcom_adsp_pil.c | 122 ++++-----
drivers/remoteproc/qcom_adsp_pil.h | 86 ++++++
drivers/remoteproc/qcom_adsp_pil_sdm845.c | 304 +++++++++++++++++++++
5 files changed, 454 insertions(+), 62 deletions(-)
create mode 100644 drivers/remoteproc/qcom_adsp_pil.h
create mode 100644 drivers/remoteproc/qcom_adsp_pil_sdm845.c
diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt
index 728e419..a9fe033 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.txt
@@ -10,6 +10,7 @@ on the Qualcomm ADSP Hexagon core.
"qcom,msm8974-adsp-pil"
"qcom,msm8996-adsp-pil"
"qcom,msm8996-slpi-pil"
+ "qcom,sdm845-apss-adsp-pil"
- interrupts-extended:
Usage: required
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 02627ed..759831b 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -14,7 +14,8 @@ obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
-obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
+obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp.o
+qcom_adsp-objs += qcom_adsp_pil.o qcom_adsp_pil_sdm845.o
obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c
index 89a86ce..9ab3698 100644
--- a/drivers/remoteproc/qcom_adsp_pil.c
+++ b/drivers/remoteproc/qcom_adsp_pil.c
@@ -1,5 +1,5 @@
/*
- * Qualcomm ADSP/SLPI Peripheral Image Loader for MSM8974 and MSM8996
+ * Qualcomm ADSP/SLPI Peripheral Image Loader for MSM8974, MSM8996 and SDM845.
*
* Copyright (C) 2016 Linaro Ltd
* Copyright (C) 2014 Sony Mobile Communications AB
@@ -22,7 +22,6 @@
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
-#include <linux/platform_device.h>
#include <linux/qcom_scm.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc.h>
@@ -30,56 +29,8 @@
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
-#include "qcom_common.h"
#include "remoteproc_internal.h"
-
-struct adsp_data {
- int crash_reason_smem;
- const char *firmware_name;
- int pas_id;
- bool has_aggre2_clk;
-
- const char *ssr_name;
- const char *sysmon_name;
- int ssctl_id;
-};
-
-struct qcom_adsp {
- struct device *dev;
- struct rproc *rproc;
-
- int wdog_irq;
- int fatal_irq;
- int ready_irq;
- int handover_irq;
- int stop_ack_irq;
-
- struct qcom_smem_state *state;
- unsigned stop_bit;
-
- struct clk *xo;
- struct clk *aggre2_clk;
-
- struct regulator *cx_supply;
- struct regulator *px_supply;
-
- int pas_id;
- int crash_reason_smem;
- bool has_aggre2_clk;
-
- struct completion start_done;
- struct completion stop_done;
-
- phys_addr_t mem_phys;
- phys_addr_t mem_reloc;
- void *mem_region;
- size_t mem_size;
-
- struct qcom_rproc_glink glink_subdev;
- struct qcom_rproc_subdev smd_subdev;
- struct qcom_rproc_ssr ssr_subdev;
- struct qcom_sysmon *sysmon;
-};
+#include "qcom_adsp_pil.h"
static int adsp_load(struct rproc *rproc, const struct firmware *fw)
{
@@ -112,18 +63,32 @@ static int adsp_start(struct rproc *rproc)
if (ret)
goto disable_cx_supply;
- ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
- if (ret) {
- dev_err(adsp->dev,
- "failed to authenticate image and release reset\n");
- goto disable_px_supply;
+ if (adsp->is_apss_controlled) {
+ ret = adsp->ops->bringup(adsp);
+ if (ret) {
+ dev_err(adsp->dev, "adsp bringup failed\n");
+ adsp->ops->bringdown(adsp);
+ goto disable_px_supply;
+ }
+ } else {
+ ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
+ if (ret) {
+ dev_err(adsp->dev,
+ "failed to authenticate image and release reset\n");
+ goto disable_px_supply;
+ }
}
ret = wait_for_completion_timeout(&adsp->start_done,
msecs_to_jiffies(5000));
if (!ret) {
dev_err(adsp->dev, "start timed out\n");
- qcom_scm_pas_shutdown(adsp->pas_id);
+
+ if (adsp->is_apss_controlled)
+ adsp->ops->bringdown(adsp);
+ else
+ qcom_scm_pas_shutdown(adsp->pas_id);
+
ret = -ETIMEDOUT;
goto disable_px_supply;
}
@@ -160,7 +125,11 @@ static int adsp_stop(struct rproc *rproc)
BIT(adsp->stop_bit),
0);
- ret = qcom_scm_pas_shutdown(adsp->pas_id);
+ if (adsp->is_apss_controlled)
+ ret = adsp->ops->bringdown(adsp);
+ else
+ ret = qcom_scm_pas_shutdown(adsp->pas_id);
+
if (ret)
dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
@@ -334,8 +303,9 @@ static int adsp_probe(struct platform_device *pdev)
if (!desc)
return -EINVAL;
- if (!qcom_scm_is_available())
- return -EPROBE_DEFER;
+ if (!desc->is_apss_controlled)
+ if (!qcom_scm_is_available())
+ return -EPROBE_DEFER;
rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
desc->firmware_name, sizeof(*adsp));
@@ -350,6 +320,7 @@ static int adsp_probe(struct platform_device *pdev)
adsp->pas_id = desc->pas_id;
adsp->crash_reason_smem = desc->crash_reason_smem;
adsp->has_aggre2_clk = desc->has_aggre2_clk;
+ adsp->is_apss_controlled = desc->is_apss_controlled;
platform_set_drvdata(pdev, adsp);
init_completion(&adsp->start_done);
@@ -399,6 +370,19 @@ static int adsp_probe(struct platform_device *pdev)
goto free_rproc;
}
+ if (adsp->is_apss_controlled) {
+ if (!desc->ops || !desc->ops->bringup ||
+ !desc->ops->bringdown || !desc->ops->map_regs) {
+ dev_err(&pdev->dev, "SoC ops not defined\n");
+ ret = -EINVAL;
+ goto free_rproc;
+ }
+ adsp->ops = desc->ops;
+ ret = adsp->ops->map_regs(adsp, pdev);
+ if (ret)
+ goto free_rproc;
+ }
+
qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
qcom_add_ssr_subdev(rproc, &adsp->ssr_subdev, desc->ssr_name);
@@ -434,11 +418,24 @@ static int adsp_remove(struct platform_device *pdev)
return 0;
}
+static const struct adsp_data sdm845_apss_adsp_resource_init = {
+ .crash_reason_smem = 423,
+ .firmware_name = "adsp.mdt",
+ .pas_id = 1,
+ .has_aggre2_clk = false,
+ .is_apss_controlled = true,
+ .ssr_name = "lpass",
+ .sysmon_name = "adsp",
+ .ssctl_id = 0x14,
+ .ops = &sdm845_soc_ops,
+};
+
static const struct adsp_data adsp_resource_init = {
.crash_reason_smem = 423,
.firmware_name = "adsp.mdt",
.pas_id = 1,
.has_aggre2_clk = false,
+ .is_apss_controlled = false,
.ssr_name = "lpass",
.sysmon_name = "adsp",
.ssctl_id = 0x14,
@@ -449,6 +446,7 @@ static int adsp_remove(struct platform_device *pdev)
.firmware_name = "slpi.mdt",
.pas_id = 12,
.has_aggre2_clk = true,
+ .is_apss_controlled = false,
.ssr_name = "dsps",
.sysmon_name = "slpi",
.ssctl_id = 0x16,
@@ -458,6 +456,8 @@ static int adsp_remove(struct platform_device *pdev)
{ .compatible = "qcom,msm8974-adsp-pil", .data = &adsp_resource_init},
{ .compatible = "qcom,msm8996-adsp-pil", .data = &adsp_resource_init},
{ .compatible = "qcom,msm8996-slpi-pil", .data = &slpi_resource_init},
+ { .compatible = "qcom,sdm845-apss-adsp-pil",
+ .data = &sdm845_apss_adsp_resource_init},
{ },
};
MODULE_DEVICE_TABLE(of, adsp_of_match);
@@ -472,5 +472,5 @@ static int adsp_remove(struct platform_device *pdev)
};
module_platform_driver(adsp_driver);
-MODULE_DESCRIPTION("Qualcomm MSM8974/MSM8996 ADSP Peripherial Image Loader");
+MODULE_DESCRIPTION("Qualcomm MSM8974/MSM8996/SDM845 ADSP Peripherial Image Loader");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_adsp_pil.h b/drivers/remoteproc/qcom_adsp_pil.h
new file mode 100644
index 0000000..29fd086
--- /dev/null
+++ b/drivers/remoteproc/qcom_adsp_pil.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (c) 2018, The Linux Foundation. All rights reserved
+
+#ifndef __QCOM_ADSP_PIL_H__
+#define __QCOM_ADSP_PIL_H__
+
+#include <linux/platform_device.h>
+#include "qcom_common.h"
+
+struct qcom_adsp;
+
+struct soc_ops {
+ int (*bringup)(struct qcom_adsp *adsp);
+ int (*bringdown)(struct qcom_adsp *adsp);
+ int (*map_regs)(struct qcom_adsp *adsp, struct platform_device *pdev);
+};
+
+struct adsp_data {
+ int crash_reason_smem;
+ const char *firmware_name;
+ int pas_id;
+ bool has_aggre2_clk;
+ bool is_apss_controlled;
+ const char *ssr_name;
+ const char *sysmon_name;
+ int ssctl_id;
+ struct soc_ops *ops;
+};
+
+struct qcom_adsp {
+ struct device *dev;
+ struct rproc *rproc;
+
+ int wdog_irq;
+ int fatal_irq;
+ int ready_irq;
+ int handover_irq;
+ int stop_ack_irq;
+
+ struct qcom_smem_state *state;
+ unsigned int stop_bit;
+
+ struct clk *xo;
+ struct clk *aggre2_clk;
+
+ struct regulator *cx_supply;
+ struct regulator *px_supply;
+
+ int pas_id;
+ int crash_reason_smem;
+ bool has_aggre2_clk;
+ bool is_apss_controlled;
+
+ struct completion start_done;
+ struct completion stop_done;
+
+ phys_addr_t mem_phys;
+ phys_addr_t mem_reloc;
+ void *mem_region;
+ size_t mem_size;
+
+ struct soc_ops *ops;
+ void *priv_reg;
+
+ struct qcom_rproc_glink glink_subdev;
+ struct qcom_rproc_subdev smd_subdev;
+ struct qcom_rproc_ssr ssr_subdev;
+ struct qcom_sysmon *sysmon;
+};
+
+extern struct soc_ops sdm845_soc_ops;
+
+static inline void update_bits(void *reg, u32 mask_val, u32 set_val, u32 shift)
+{
+ u32 reg_val = 0;
+
+ reg_val = ((readl(reg)) & ~mask_val) | ((set_val << shift) & mask_val);
+ writel(reg_val, reg);
+}
+
+static inline unsigned int read_bit(void *reg, u32 mask, int shift)
+{
+ return ((readl(reg) & mask) >> shift);
+}
+
+#endif
diff --git a/drivers/remoteproc/qcom_adsp_pil_sdm845.c b/drivers/remoteproc/qcom_adsp_pil_sdm845.c
new file mode 100644
index 0000000..7518385
--- /dev/null
+++ b/drivers/remoteproc/qcom_adsp_pil_sdm845.c
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Qualcomm APSS Based ADSP bootup/shutdown ops for SDM845.
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include "qcom_adsp_pil.h"
+
+/* set values */
+#define CLK_ENABLE 0x1
+#define CLK_DISABLE 0x0
+/* time out value */
+#define ACK_TIMEOUT 200000
+/* mask values */
+#define CLK_MASK GENMASK(4, 0)
+#define EVB_MASK GENMASK(27, 4)
+#define SPIN_CLKOFF_MASK BIT(31)
+#define AUDIO_SYNC_RESET_MASK BIT(2)
+#define CLK_ENABLE_MASK BIT(0)
+#define HAL_CLK_MASK BIT(1)
+/* GCC register offsets */
+#define GCC_BASE 0x00147000
+#define SWAY_CBCR_OFFSET 0x00000008
+/*LPASS register base address and offsets*/
+#define LPASS_BASE 0x17000000
+#define AON_CBCR_OFFSET 0x00014098
+#define CMD_RCGR_OFFSET 0x00014000
+#define CFG_RCGR_OFFSET 0x00014004
+#define AHBS_AON_CBCR_OFFSET 0x00033000
+#define AHBM_AON_CBCR_OFFSET 0x00026000
+/*QDSP6SS register base address and offsets*/
+#define QDSP6SS_BASE 0x17300000
+#define RST_EVB_OFFSET 0x00000010
+#define SLEEP_CBCR_OFFSET 0x0000003C
+#define XO_CBCR_OFFSET 0x00000038
+#define CORE_CBCR_OFFSET 0x00000020
+#define CORE_START_OFFSET 0x00000400
+#define BOOT_CMD_OFFSET 0x00000404
+#define BOOT_STATUS_OFFSET 0x00000408
+#define RET_CFG_OFFSET 0x0000001C
+/*TCSR register base address and offsets*/
+#define TCSR_BASE 0x01F62000
+#define TCSR_LPASS_MASTER_IDLE_OFFSET 0x00000008
+#define TCSR_LPASS_HALTACK_OFFSET 0x00000004
+#define TCSR_LPASS_PWR_ON_OFFSET 0x00000010
+#define TCSR_LPASS_HALTREQ_OFFSET 0X00000000
+
+#define RPMH_PDC_SYNC_RESET_ADDR 0x0B2E0100
+#define AOSS_CC_LPASS_RESTART_ADDR 0x0C2D0000
+
+struct sdm845_reg {
+ void __iomem *gcc_base;
+ void __iomem *lpass_base;
+ void __iomem *qdsp6ss_base;
+ void __iomem *tcsr_base;
+ void __iomem *pdc_sync;
+ void __iomem *cc_lpass;
+};
+
+static int sdm845_map_registers(struct qcom_adsp *adsp,
+ struct platform_device *pdev)
+{
+ struct sdm845_reg *reg;
+
+ adsp->priv_reg = devm_kzalloc(&pdev->dev, sizeof(struct sdm845_reg),
+ GFP_KERNEL);
+ if (!adsp->priv_reg)
+ return -ENOMEM;
+
+ reg = adsp->priv_reg;
+
+ reg->gcc_base = devm_ioremap(adsp->dev, GCC_BASE, 0xc);
+ if (!reg->gcc_base) {
+ dev_err(adsp->dev, "%s: failed to map GCC base registers\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ reg->lpass_base = devm_ioremap(adsp->dev, LPASS_BASE, 0x8E004);
+ if (!reg->lpass_base) {
+ dev_err(adsp->dev, "%s: failed to map LPASS base registers\n",
+ __func__);
+ return -ENOMEM;
+ }
+ reg->qdsp6ss_base = devm_ioremap(adsp->dev, QDSP6SS_BASE, 0x40c);
+ if (!reg->qdsp6ss_base) {
+ dev_err(adsp->dev, "%s: failed to map QDSP6SS base registers\n",
+ __func__);
+ return -ENOMEM;
+ }
+ reg->tcsr_base = devm_ioremap(adsp->dev, TCSR_BASE, 0x14);
+ if (!reg->tcsr_base) {
+ dev_err(adsp->dev, "%s: failed to map TCSR base registers\n",
+ __func__);
+ return -ENOMEM;
+ }
+ reg->pdc_sync = devm_ioremap(adsp->dev, RPMH_PDC_SYNC_RESET_ADDR, 0x4);
+ if (!reg->pdc_sync) {
+ dev_err(adsp->dev, "%s: failed to map RPMH_PDC_SYNC_RESET register\n",
+ __func__);
+ return -ENOMEM;
+ }
+ reg->cc_lpass = devm_ioremap(adsp->dev, AOSS_CC_LPASS_RESTART_ADDR,
+ 0x4);
+ if (!reg->cc_lpass) {
+ dev_err(adsp->dev, "%s:failed to map AOSS_CC_LPASS_RESTART register\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int clk_enable_spin(void *reg, int read_shift, int write_shift)
+{
+ u32 maxDelay = 500;
+ u32 val;
+
+ update_bits(reg, CLK_ENABLE_MASK, CLK_ENABLE, write_shift);
+ val = readl(reg);
+ if (!(readl(reg) & HAL_CLK_MASK)) {
+ /*
+ * wait for disabling of HW signal CLK_OFF to confirm that
+ * clock is actually ON.
+ */
+ while (maxDelay-- && read_bit(reg, SPIN_CLKOFF_MASK,
+ read_shift))
+ udelay(1);
+ }
+ if (!maxDelay) {
+ pr_err("%s: fail to update register = %p\n", __func__, reg);
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int sdm845_adsp_clk_enable(struct qcom_adsp *adsp)
+{
+ u32 ret;
+ u32 maxDelay = 100;
+ struct sdm845_reg *reg = adsp->priv_reg;
+
+ /* Enable SWAY clock */
+ ret = clk_enable_spin(reg->gcc_base + SWAY_CBCR_OFFSET, CLK_MASK, 0x0);
+ if (ret)
+ return ret;
+
+ /* Enable LPASS AHB AON Bus */
+ ret = clk_enable_spin(reg->lpass_base + AON_CBCR_OFFSET, CLK_MASK, 0x0);
+ if (ret)
+ return ret;
+
+ /* Set the AON clock root to be sourced by XO */
+ writel(CLK_DISABLE, reg->lpass_base + CFG_RCGR_OFFSET);
+ writel(CLK_ENABLE, reg->lpass_base + CMD_RCGR_OFFSET);
+
+ while (read_bit((reg->lpass_base + CMD_RCGR_OFFSET), CLK_ENABLE, 0)
+ && maxDelay--)
+ udelay(2);
+
+ if (!maxDelay) {
+ pr_err("%s: fail to enable CMD_RCGR clock\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ /* Enable the QDSP6SS AHBM and AHBS clocks */
+ ret = clk_enable_spin(reg->lpass_base + AHBS_AON_CBCR_OFFSET,
+ CLK_MASK, 0x0);
+ if (ret)
+ return ret;
+ ret = clk_enable_spin(reg->lpass_base + AHBM_AON_CBCR_OFFSET,
+ CLK_MASK, 0x0);
+ if (ret)
+ return ret;
+
+ /* Turn on the XO clock, required to boot FSM */
+ update_bits(reg->qdsp6ss_base + XO_CBCR_OFFSET, CLK_ENABLE_MASK,
+ CLK_ENABLE, 0x0);
+
+ /* Enable the QDSP6SS sleep clock for the QDSP6 watchdog enablement */
+ update_bits(reg->qdsp6ss_base + SLEEP_CBCR_OFFSET,
+ CLK_ENABLE_MASK, CLK_ENABLE, 0x0);
+
+ /* Configure QDSP6 core CBC to enable clock */
+ update_bits(reg->qdsp6ss_base + CORE_CBCR_OFFSET, CLK_ENABLE_MASK,
+ CLK_ENABLE, 0x0);
+ return 0;
+}
+
+static int sdm845_adsp_reset(struct qcom_adsp *adsp)
+{
+ u32 timeout = ACK_TIMEOUT;
+ struct sdm845_reg *reg = adsp->priv_reg;
+
+ /* De-assert QDSP6 stop core. QDSP6 will execute after out of reset */
+ update_bits(reg->qdsp6ss_base + CORE_START_OFFSET,
+ CLK_ENABLE_MASK, CLK_ENABLE, 0x0);
+ /* Trigger boot FSM to start QDSP6 */
+ writel(CLK_ENABLE, reg->qdsp6ss_base + BOOT_CMD_OFFSET);
+
+ /* Wait for core to come out of reset */
+ while ((!(readl(reg->qdsp6ss_base +
+ BOOT_STATUS_OFFSET))) && (timeout-- > 0))
+ udelay(5);
+
+ if (!timeout)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static int sdm845_bringup(struct qcom_adsp *adsp)
+{
+ u32 ret;
+ struct sdm845_reg *reg = adsp->priv_reg;
+
+ ret = sdm845_adsp_clk_enable(adsp);
+ if (ret) {
+ dev_err(adsp->dev, "%s: sdm845_adsp_clk_enable failed\n",
+ __func__);
+ return ret;
+ }
+ /* Program boot address */
+ update_bits(reg->qdsp6ss_base + RST_EVB_OFFSET,
+ EVB_MASK, (adsp->mem_phys) >> 8, 0x4);
+
+ /* Wait for addresses to be programmed before starting adsp */
+ mb();
+ ret = sdm845_adsp_reset(adsp);
+ if (ret)
+ dev_err(adsp->dev, "%s: De-assert QDSP6 out of reset failed\n",
+ __func__);
+ return ret;
+}
+
+static int sdm845_bringdown(struct qcom_adsp *adsp)
+{
+ u32 acktimeout = ACK_TIMEOUT;
+ u32 temp;
+ struct sdm845_reg *reg = adsp->priv_reg;
+
+ /* Reset the retention logic */
+ update_bits(reg->qdsp6ss_base + RET_CFG_OFFSET,
+ CLK_ENABLE_MASK, CLK_ENABLE, 0x0);
+ /* Disable the slave way clock to LPASS */
+ update_bits(reg->gcc_base + SWAY_CBCR_OFFSET,
+ CLK_ENABLE_MASK, CLK_DISABLE, 0x0);
+
+ /* QDSP6 master port needs to be explicitly halted */
+ temp = read_bit(reg->tcsr_base + TCSR_LPASS_PWR_ON_OFFSET,
+ CLK_ENABLE, 0x0);
+ temp = temp && !read_bit(reg->tcsr_base + TCSR_LPASS_MASTER_IDLE_OFFSET,
+ CLK_ENABLE, 0x0);
+ if (temp) {
+ writel(CLK_ENABLE, reg->tcsr_base + TCSR_LPASS_HALTREQ_OFFSET);
+ /* Wait for halt ACK from QDSP6 */
+ while ((read_bit(reg->tcsr_base + TCSR_LPASS_HALTACK_OFFSET,
+ CLK_DISABLE, 0x0) == 0) && (acktimeout-- > 0))
+ udelay(5);
+
+ if (acktimeout) {
+ if (read_bit(reg->tcsr_base +
+ TCSR_LPASS_MASTER_IDLE_OFFSET,
+ CLK_ENABLE, 0x0) != 1)
+ dev_warn(adsp->dev,
+ "%s: failed to receive %s\n",
+ __func__, "TCSR MASTER ACK");
+ } else {
+ dev_err(adsp->dev, "%s: failed to receive halt ack\n",
+ __func__);
+ return -ETIMEDOUT;
+ }
+ }
+
+ /* Assert the LPASS PDC Reset */
+ update_bits(reg->pdc_sync, AUDIO_SYNC_RESET_MASK,
+ CLK_ENABLE, 0x2);
+ /* Place the LPASS processor into reset */
+ writel(CLK_ENABLE, reg->cc_lpass);
+ /* wait after asserting subsystem restart from AOSS */
+ udelay(200);
+
+ /* Clear the halt request for the AXIM and AHBM for Q6 */
+ writel(CLK_DISABLE, reg->tcsr_base + TCSR_LPASS_HALTREQ_OFFSET);
+
+ /* De-assert the LPASS PDC Reset */
+ update_bits(reg->pdc_sync, AUDIO_SYNC_RESET_MASK,
+ CLK_DISABLE, 0x2);
+ /* Remove the LPASS reset */
+ writel(CLK_DISABLE, reg->cc_lpass);
+ /* wait after de-asserting subsystem restart from AOSS */
+ udelay(200);
+
+ return 0;
+}
+
+struct soc_ops sdm845_soc_ops = {
+ .bringup = sdm845_bringup,
+ .bringdown = sdm845_bringdown,
+ .map_regs = sdm845_map_registers,
+};
--
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