[PATCH v3 2/2] remoteproc: qcom: Introduce Non-PAS ADSP PIL driver

Rohit kumar
2018-09-03T11:52:40Z

This adds Non PAS ADSP PIL driver for Qualcomm
Technologies Inc SoCs.
Added initial support for SDM845 with ADSP bootup and
shutdown operation handled from Application Processor
SubSystem(APSS).

Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
---
drivers/remoteproc/Kconfig | 14 ++
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/qcom_adsp_pil.c | 500 +++++++++++++++++++++++++++++++++++++
3 files changed, 515 insertions(+)
create mode 100644 drivers/remoteproc/qcom_adsp_pil.c

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index c98c0b2..445de2d 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -139,6 +139,20 @@ config QCOM_Q6V5_WCSS
Say y here to support the Qualcomm Peripheral Image Loader for the
Hexagon V5 based WCSS remote processors.

+config QCOM_ADSP_PIL
+ tristate "Qualcomm Technology Inc ADSP Peripheral Image Loader"
+ depends on OF && ARCH_QCOM
+ depends on QCOM_SMEM
+ depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+ depends on QCOM_SYSMON || QCOM_SYSMON=n
+ select MFD_SYSCON
+ select QCOM_MDT_LOADER
+ select QCOM_Q6V5_COMMON
+ select QCOM_RPROC_COMMON
+ help
+ Say y here to support the Peripherial Image Loader
+ for the Qualcomm Technology Inc. ADSP remote processors.
+
config QCOM_SYSMON
tristate "Qualcomm sysmon driver"
depends on RPMSG
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index eb86c8b..1258519 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o
obj-$(CONFIG_QCOM_Q6V5_PAS) += qcom_q6v5_pas.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_Q6V5_WCSS) += qcom_q6v5_wcss.o
+obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
qcom_wcnss_pil-y += qcom_wcnss.o
diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c
new file mode 100644
index 0000000..977e804
--- /dev/null
+++ b/drivers/remoteproc/qcom_adsp_pil.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Qualcomm Technology Inc. ADSP Peripheral Image Loader for SDM845.
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/reset.h>
+#include <linux/iopoll.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+#include "qcom_common.h"
+#include "qcom_q6v5.h"
+#include "remoteproc_internal.h"
+
+/* time out value */
+#define ACK_TIMEOUT 1000
+#define BOOT_FSM_TIMEOUT 10000
+/* mask values */
+#define EVB_MASK GENMASK(27, 4)
+/*QDSP6SS register offsets*/
+#define RST_EVB_REG 0x10
+#define CORE_START_REG 0x400
+#define BOOT_CMD_REG 0x404
+#define BOOT_STATUS_REG 0x408
+#define RET_CFG_REG 0x1C
+/*TCSR register offsets*/
+#define LPASS_MASTER_IDLE_REG 0x8
+#define LPASS_HALTACK_REG 0x4
+#define LPASS_PWR_ON_REG 0x10
+#define LPASS_HALTREQ_REG 0x0
+
+/* list of clocks required by ADSP PIL */
+static const char * const adsp_clk_id[] = {
+ "sway_cbcr", "lpass_aon", "lpass_ahbs_aon_cbcr", "lpass_ahbm_aon_cbcr",
+ "qdsp6ss_xo", "qdsp6ss_sleep", "qdsp6ss_core",
+};
+
+struct adsp_pil_data {
+ int crash_reason_smem;
+ const char *firmware_name;
+
+ const char *ssr_name;
+ const char *sysmon_name;
+ int ssctl_id;
+};
+
+struct qcom_adsp {
+ struct device *dev;
+ struct rproc *rproc;
+
+ struct qcom_q6v5 q6v5;
+
+ struct clk *xo;
+
+ int num_clks;
+ struct clk_bulk_data *clks;
+
+ void __iomem *qdsp6ss_base;
+
+ struct reset_control *pdc_sync_reset;
+ struct reset_control *cc_lpass_restart;
+
+ struct regmap *halt_map;
+ unsigned int halt_lpass;
+
+ int crash_reason_smem;
+
+ 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_ssr ssr_subdev;
+ struct qcom_sysmon *sysmon;
+};
+
+static int qcom_adsp_shutdown(struct qcom_adsp *adsp)
+{
+ unsigned long timeout;
+ unsigned int val;
+ int ret;
+
+ /* Reset the retention logic */
+ val = readl(adsp->qdsp6ss_base + RET_CFG_REG);
+ val |= 0x1;
+ writel(val, adsp->qdsp6ss_base + RET_CFG_REG);
+
+ clk_bulk_disable_unprepare(adsp->num_clks, adsp->clks);
+
+ /* QDSP6 master port needs to be explicitly halted */
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_PWR_ON_REG, &val);
+ if (ret || !val)
+ goto reset;
+
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_MASTER_IDLE_REG,
+ &val);
+ if (ret || val)
+ goto reset;
+
+ regmap_write(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTREQ_REG, 1);
+
+ /* Wait for halt ACK from QDSP6 */
+ timeout = jiffies + msecs_to_jiffies(ACK_TIMEOUT);
+ for (;;) {
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTACK_REG, &val);
+ if (ret || val || time_after(jiffies, timeout))
+ break;
+
+ udelay(1000);
+ }
+
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_MASTER_IDLE_REG, &val);
+ if (ret || !val)
+ dev_err(adsp->dev, "port failed halt\n");
+
+reset:
+ /* Assert the LPASS PDC Reset */
+ reset_control_assert(adsp->pdc_sync_reset);
+ /* Place the LPASS processor into reset */
+ reset_control_assert(adsp->cc_lpass_restart);
+ /* wait after asserting subsystem restart from AOSS */
+ udelay(200);
+
+ /* Clear the halt request for the AXIM and AHBM for Q6 */
+ regmap_write(adsp->halt_map, adsp->halt_lpass + LPASS_HALTREQ_REG, 0);
+
+ /* De-assert the LPASS PDC Reset */
+ reset_control_deassert(adsp->pdc_sync_reset);
+ /* Remove the LPASS reset */
+ reset_control_deassert(adsp->cc_lpass_restart);
+ /* wait after de-asserting subsystem restart from AOSS */
+ udelay(200);
+
+ return 0;
+}
+
+static int adsp_load(struct rproc *rproc, const struct firmware *fw)
+{
+ struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+
+ return qcom_mdt_load_no_init(adsp->dev, fw, rproc->firmware, 0,
+ adsp->mem_region, adsp->mem_phys, adsp->mem_size,
+ &adsp->mem_reloc);
+}
+
+static int adsp_start(struct rproc *rproc)
+{
+ struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+ int ret;
+ unsigned int val;
+
+ qcom_q6v5_prepare(&adsp->q6v5);
+
+ ret = clk_prepare_enable(adsp->xo);
+ if (ret)
+ return ret;
+
+ dev_pm_genpd_set_performance_state(adsp->dev, INT_MAX);
+ ret = pm_runtime_get_sync(adsp->dev);
+ if (ret)
+ goto disable_xo_clk;
+
+ ret = clk_bulk_prepare_enable(adsp->num_clks, adsp->clks);
+ if (ret) {
+ dev_err(adsp->dev, "adsp clk_enable failed\n");
+ goto disable_power_domain;
+ }
+
+ /* Program boot address */
+ writel(adsp->mem_phys >> 4, adsp->qdsp6ss_base + RST_EVB_REG);
+
+ /* De-assert QDSP6 stop core. QDSP6 will execute after out of reset */
+ writel(0x1, adsp->qdsp6ss_base + CORE_START_REG);
+
+ /* Trigger boot FSM to start QDSP6 */
+ writel(0x1, adsp->qdsp6ss_base + BOOT_CMD_REG);
+
+ /* Wait for core to come out of reset */
+ ret = readl_poll_timeout(adsp->qdsp6ss_base + BOOT_STATUS_REG,
+ val, (val & BIT(0)) != 0, 10, BOOT_FSM_TIMEOUT);
+ if (ret) {
+ dev_err(adsp->dev, "failed to bootup adsp\n");
+ goto disable_adsp_clks;
+ }
+
+ ret = qcom_q6v5_wait_for_start(&adsp->q6v5, msecs_to_jiffies(5 * HZ));
+ if (ret == -ETIMEDOUT) {
+ dev_err(adsp->dev, "start timed out\n");
+ goto disable_adsp_clks;
+ }
+
+ return 0;
+
+disable_adsp_clks:
+ clk_bulk_disable_unprepare(adsp->num_clks, adsp->clks);
+disable_power_domain:
+ dev_pm_genpd_set_performance_state(adsp->dev, 0);
+ pm_runtime_put(adsp->dev);
+disable_xo_clk:
+ clk_disable_unprepare(adsp->xo);
+
+ return ret;
+}
+
+static void qcom_adsp_pil_handover(struct qcom_q6v5 *q6v5)
+{
+ struct qcom_adsp *adsp = container_of(q6v5, struct qcom_adsp, q6v5);
+
+ clk_disable_unprepare(adsp->xo);
+ dev_pm_genpd_set_performance_state(adsp->dev, 0);
+ pm_runtime_put(adsp->dev);
+}
+
+static int adsp_stop(struct rproc *rproc)
+{
+ struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+ int handover;
+ int ret;
+
+ ret = qcom_q6v5_request_stop(&adsp->q6v5);
+ if (ret == -ETIMEDOUT)
+ dev_err(adsp->dev, "timed out on wait\n");
+
+ ret = qcom_adsp_shutdown(adsp);
+ if (ret)
+ dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
+
+ handover = qcom_q6v5_unprepare(&adsp->q6v5);
+ if (handover)
+ qcom_adsp_pil_handover(&adsp->q6v5);
+
+ return ret;
+}
+
+static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+ struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+ int offset;
+
+ offset = da - adsp->mem_reloc;
+ if (offset < 0 || offset + len > adsp->mem_size)
+ return NULL;
+
+ return adsp->mem_region + offset;
+}
+
+static const struct rproc_ops adsp_ops = {
+ .start = adsp_start,
+ .stop = adsp_stop,
+ .da_to_va = adsp_da_to_va,
+ .parse_fw = qcom_register_dump_segments,
+ .load = adsp_load,
+};
+
+static int adsp_init_clock(struct qcom_adsp *adsp)
+{
+ int i, ret;
+
+ adsp->xo = devm_clk_get(adsp->dev, "xo");
+ if (IS_ERR(adsp->xo)) {
+ ret = PTR_ERR(adsp->xo);
+ if (ret != -EPROBE_DEFER)
+ dev_err(adsp->dev, "failed to get xo clock");
+ return ret;
+ }
+
+ adsp->num_clks = ARRAY_SIZE(adsp_clk_id);
+ adsp->clks = devm_kcalloc(adsp->dev, adsp->num_clks,
+ sizeof(*adsp->clks), GFP_KERNEL);
+ if (IS_ERR(adsp->clks)) {
+ ret = PTR_ERR(adsp->clks);
+ if (ret != -EPROBE_DEFER)
+ dev_err(adsp->dev, "failed to get adsp clock");
+ return ret;
+ }
+
+ for (i = 0; i < adsp->num_clks; i++)
+ adsp->clks[i].id = adsp_clk_id[i];
+
+ return devm_clk_bulk_get(adsp->dev, adsp->num_clks, adsp->clks);
+}
+
+static int adsp_init_reset(struct qcom_adsp *adsp)
+{
+ adsp->pdc_sync_reset = devm_reset_control_get_exclusive(adsp->dev,
+ "pdc_sync");
+ if (IS_ERR(adsp->pdc_sync_reset)) {
+ dev_err(adsp->dev, "failed to acquire pdc_sync reset\n");
+ return PTR_ERR(adsp->pdc_sync_reset);
+ }
+
+ adsp->cc_lpass_restart = devm_reset_control_get_exclusive(adsp->dev,
+ "cc_lpass");
+ if (IS_ERR(adsp->cc_lpass_restart)) {
+ dev_err(adsp->dev, "failed to acquire cc_lpass restart\n");
+ return PTR_ERR(adsp->cc_lpass_restart);
+ }
+
+ return 0;
+}
+
+static int adsp_init_mmio(struct qcom_adsp *adsp,
+ struct platform_device *pdev)
+{
+ struct device_node *syscon;
+ struct resource *res;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ adsp->qdsp6ss_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (IS_ERR(adsp->qdsp6ss_base)) {
+ dev_err(adsp->dev, "failed to map QDSP6SS registers\n");
+ return PTR_ERR(adsp->qdsp6ss_base);
+ }
+
+ syscon = of_parse_phandle(pdev->dev.of_node, "qcom,halt-regs", 0);
+ if (!syscon) {
+ dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
+ return -EINVAL;
+ }
+
+ adsp->halt_map = syscon_node_to_regmap(syscon);
+ of_node_put(syscon);
+ if (IS_ERR(adsp->halt_map))
+ return PTR_ERR(adsp->halt_map);
+
+ ret = of_property_read_u32_index(pdev->dev.of_node, "qcom,halt-regs",
+ 1, &adsp->halt_lpass);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "no offset in syscon\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
+{
+ struct device_node *node;
+ struct resource r;
+ int ret;
+
+ node = of_parse_phandle(adsp->dev->of_node, "memory-region", 0);
+ if (!node) {
+ dev_err(adsp->dev, "no memory-region specified\n");
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(node, 0, &r);
+ if (ret)
+ return ret;
+
+ adsp->mem_phys = adsp->mem_reloc = r.start;
+ adsp->mem_size = resource_size(&r);
+ adsp->mem_region = devm_ioremap_wc(adsp->dev,
+ adsp->mem_phys, adsp->mem_size);
+ if (!adsp->mem_region) {
+ dev_err(adsp->dev, "unable to map memory region: %pa+%zx\n",
+ &r.start, adsp->mem_size);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int adsp_probe(struct platform_device *pdev)
+{
+ const struct adsp_pil_data *desc;
+ struct qcom_adsp *adsp;
+ struct rproc *rproc;
+ int ret;
+
+ desc = of_device_get_match_data(&pdev->dev);
+ if (!desc)
+ return -EINVAL;
+
+ rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
+ desc->firmware_name, sizeof(*adsp));
+ if (!rproc) {
+ dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+ return -ENOMEM;
+ }
+
+ adsp = (struct qcom_adsp *)rproc->priv;
+ adsp->dev = &pdev->dev;
+ adsp->rproc = rproc;
+ platform_set_drvdata(pdev, adsp);
+
+ ret = adsp_alloc_memory_region(adsp);
+ if (ret)
+ goto free_rproc;
+
+ ret = adsp_init_clock(adsp);
+ if (ret)
+ goto free_rproc;
+
+ pm_runtime_enable(adsp->dev);
+
+ ret = adsp_init_reset(adsp);
+ if (ret)
+ goto disable_pm;
+
+ ret = adsp_init_mmio(adsp, pdev);
+ if (ret)
+ goto disable_pm;
+
+ ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem,
+ qcom_adsp_pil_handover);
+ if (ret)
+ goto disable_pm;
+
+ qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
+ qcom_add_ssr_subdev(rproc, &adsp->ssr_subdev, desc->ssr_name);
+ adsp->sysmon = qcom_add_sysmon_subdev(rproc,
+ desc->sysmon_name,
+ desc->ssctl_id);
+
+ ret = rproc_add(rproc);
+ if (ret)
+ goto disable_pm;
+
+ return 0;
+
+disable_pm:
+ pm_runtime_disable(adsp->dev);
+free_rproc:
+ rproc_free(rproc);
+
+ return ret;
+}
+
+static int adsp_remove(struct platform_device *pdev)
+{
+ struct qcom_adsp *adsp = platform_get_drvdata(pdev);
+
+ rproc_del(adsp->rproc);
+
+ qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
+ qcom_remove_sysmon_subdev(adsp->sysmon);
+ qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
+ rproc_free(adsp->rproc);
+ pm_runtime_disable(adsp->dev);
+
+ return 0;
+}
+
+static const struct adsp_pil_data adsp_resource_init = {
+ .crash_reason_smem = 423,
+ .firmware_name = "adsp.mdt",
+ .ssr_name = "lpass",
+ .sysmon_name = "adsp",
+ .ssctl_id = 0x14,
+};
+
+static const struct of_device_id adsp_of_match[] = {
+ { .compatible = "qcom,sdm845-adsp-pil",
+ .data = &adsp_resource_init},
+ { },
+};
+MODULE_DEVICE_TABLE(of, adsp_of_match);
+
+static struct platform_driver adsp_pil_driver = {
+ .probe = adsp_probe,
+ .remove = adsp_remove,
+ .driver = {
+ .name = "qcom_adsp_pil",
+ .of_match_table = adsp_of_match,
+ },
+};
+
+module_platform_driver(adsp_pil_driver);
+MODULE_DESCRIPTION("QTi SDM845 ADSP Peripherial Image Loader");
+MODULE_LICENSE("GPL v2");
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.