[PATCH v7 3/3] remoteproc: qcom: q6v5_wpss: Add support for sc7280 WPSS

From: Rakesh Pillai
Date: Thu Oct 28 2021 - 04:14:37 EST

Add support for PIL loading of WPSS processor for SC7280
- WPSS boot will be requested by the wifi driver and hence
disable auto-boot for WPSS.
- Add a separate shutdown sequence handler for WPSS.
- Add multiple power-domain voting support
- Parse firmware-name from dtsi entry

Signed-off-by: Rakesh Pillai <pillair@xxxxxxxxxxxxxx>
---
drivers/remoteproc/qcom_q6v5_adsp.c | 219 +++++++++++++++++++++++++++++++++---
1 file changed, 203 insertions(+), 16 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
index 098362e6..7d07e79 100644
--- a/drivers/remoteproc/qcom_q6v5_adsp.c
+++ b/drivers/remoteproc/qcom_q6v5_adsp.c
@@ -32,6 +32,7 @@

/* time out value */
#define ACK_TIMEOUT 1000
+#define ACK_TIMEOUT_US 1000000
#define BOOT_FSM_TIMEOUT 10000
/* mask values */
#define EVB_MASK GENMASK(27, 4)
@@ -51,6 +52,8 @@
#define QDSP6SS_CORE_CBCR 0x20
#define QDSP6SS_SLEEP_CBCR 0x3c

+#define QCOM_Q6V5_RPROC_PROXY_PD_MAX 3
+
struct adsp_pil_data {
int crash_reason_smem;
const char *firmware_name;
@@ -58,9 +61,13 @@ struct adsp_pil_data {
const char *ssr_name;
const char *sysmon_name;
int ssctl_id;
+ bool is_wpss;
+ bool auto_boot;

const char **clk_ids;
int num_clks;
+ const char **proxy_pd_names;
+ const char *load_state;
};

struct qcom_adsp {
@@ -93,11 +100,143 @@ struct qcom_adsp {
void *mem_region;
size_t mem_size;

+ struct device *proxy_pds[QCOM_Q6V5_RPROC_PROXY_PD_MAX];
+ int proxy_pd_count;
+
struct qcom_rproc_glink glink_subdev;
struct qcom_rproc_ssr ssr_subdev;
struct qcom_sysmon *sysmon;
+
+ int (*shutdown)(struct qcom_adsp *adsp);
};

+static int qcom_rproc_pds_attach(struct device *dev, struct device **devs,
+ const char **pd_names)
+{
+ size_t num_pds = 0;
+ int ret;
+ int i;
+
+ if (!pd_names)
+ return 0;
+
+ /* Handle single power domain */
+ if (dev->pm_domain) {
+ devs[0] = dev;
+ pm_runtime_enable(dev);
+ return 1;
+ }
+
+ while (pd_names[num_pds])
+ num_pds++;
+
+ for (i = 0; i < num_pds; i++) {
+ devs[i] = dev_pm_domain_attach_by_name(dev, pd_names[i]);
+ if (IS_ERR_OR_NULL(devs[i])) {
+ ret = PTR_ERR(devs[i]) ? : -ENODATA;
+ goto unroll_attach;
+ }
+ }
+
+ return num_pds;
+
+unroll_attach:
+ for (i--; i >= 0; i--)
+ dev_pm_domain_detach(devs[i], false);
+
+ return ret;
+}
+
+static void qcom_rproc_pds_detach(struct qcom_adsp *adsp, struct device **pds,
+ size_t pd_count)
+{
+ struct device *dev = adsp->dev;
+ int i;
+
+ /* Handle single power domain */
+ if (dev->pm_domain && pd_count) {
+ pm_runtime_disable(dev);
+ return;
+ }
+
+ for (i = 0; i < pd_count; i++)
+ dev_pm_domain_detach(pds[i], false);
+}
+
+static int qcom_rproc_pds_enable(struct qcom_adsp *adsp, struct device **pds,
+ size_t pd_count)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < pd_count; i++) {
+ dev_pm_genpd_set_performance_state(pds[i], INT_MAX);
+ ret = pm_runtime_get_sync(pds[i]);
+ if (ret < 0) {
+ pm_runtime_put_noidle(pds[i]);
+ dev_pm_genpd_set_performance_state(pds[i], 0);
+ goto unroll_pd_votes;
+ }
+ }
+
+ return 0;
+
+unroll_pd_votes:
+ for (i--; i >= 0; i--) {
+ dev_pm_genpd_set_performance_state(pds[i], 0);
+ pm_runtime_put(pds[i]);
+ }
+
+ return ret;
+}
+
+static void qcom_rproc_pds_disable(struct qcom_adsp *adsp, struct device **pds,
+ size_t pd_count)
+{
+ int i;
+
+ for (i = 0; i < pd_count; i++) {
+ dev_pm_genpd_set_performance_state(pds[i], 0);
+ pm_runtime_put(pds[i]);
+ }
+}
+
+static int qcom_wpss_shutdown(struct qcom_adsp *adsp)
+{
+ unsigned int val;
+
+ regmap_write(adsp->halt_map, adsp->halt_lpass + LPASS_HALTREQ_REG, 1);
+
+ /* Wait for halt ACK from QDSP6 */
+ regmap_read_poll_timeout(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTACK_REG, val,
+ val, 1000, ACK_TIMEOUT_US);
+
+ /* Assert the WPSS PDC Reset */
+ reset_control_assert(adsp->pdc_sync_reset);
+ /* Place the WPSS processor into reset */
+ reset_control_assert(adsp->restart);
+ /* wait after asserting subsystem restart from AOSS */
+ usleep_range(200, 205);
+ /* Remove the WPSS reset */
+ reset_control_deassert(adsp->restart);
+ /* De-assert the WPSS PDC Reset */
+ reset_control_deassert(adsp->pdc_sync_reset);
+
+ usleep_range(100, 105);
+
+ clk_bulk_disable_unprepare(adsp->num_clks, adsp->clks);
+
+ regmap_write(adsp->halt_map, adsp->halt_lpass + LPASS_HALTREQ_REG, 0);
+
+ /* Wait for halt ACK from QDSP6 */
+ regmap_read_poll_timeout(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTACK_REG, val,
+ !val, 1000, ACK_TIMEOUT_US);
+
+ return 0;
+}
+
static int qcom_adsp_shutdown(struct qcom_adsp *adsp)
{
unsigned long timeout;
@@ -193,12 +332,10 @@ static int adsp_start(struct rproc *rproc)
if (ret)
goto disable_irqs;

- dev_pm_genpd_set_performance_state(adsp->dev, INT_MAX);
- ret = pm_runtime_get_sync(adsp->dev);
- if (ret) {
- pm_runtime_put_noidle(adsp->dev);
+ ret = qcom_rproc_pds_enable(adsp, adsp->proxy_pds,
+ adsp->proxy_pd_count);
+ if (ret < 0)
goto disable_xo_clk;
- }

ret = clk_bulk_prepare_enable(adsp->num_clks, adsp->clks);
if (ret) {
@@ -243,8 +380,7 @@ static int adsp_start(struct rproc *rproc)
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);
+ qcom_rproc_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
disable_xo_clk:
clk_disable_unprepare(adsp->xo);
disable_irqs:
@@ -258,8 +394,7 @@ 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);
+ qcom_rproc_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
}

static int adsp_stop(struct rproc *rproc)
@@ -272,7 +407,7 @@ static int adsp_stop(struct rproc *rproc)
if (ret == -ETIMEDOUT)
dev_err(adsp->dev, "timed out on wait\n");

- ret = qcom_adsp_shutdown(adsp);
+ ret = adsp->shutdown(adsp);
if (ret)
dev_err(adsp->dev, "failed to shutdown: %d\n", ret);

@@ -427,6 +562,7 @@ static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
static int adsp_probe(struct platform_device *pdev)
{
const struct adsp_pil_data *desc;
+ const char *firmware_name;
struct qcom_adsp *adsp;
struct rproc *rproc;
int ret;
@@ -435,12 +571,22 @@ static int adsp_probe(struct platform_device *pdev)
if (!desc)
return -EINVAL;

+ firmware_name = desc->firmware_name;
+ ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
+ &firmware_name);
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(&pdev->dev, "unable to read firmware-name\n");
+ return ret;
+ }
+
rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
- desc->firmware_name, sizeof(*adsp));
+ firmware_name, sizeof(*adsp));
if (!rproc) {
dev_err(&pdev->dev, "unable to allocate remoteproc\n");
return -ENOMEM;
}
+
+ rproc->auto_boot = desc->auto_boot;
rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_NONE);

adsp = (struct qcom_adsp *)rproc->priv;
@@ -449,6 +595,11 @@ static int adsp_probe(struct platform_device *pdev)
adsp->info_name = desc->sysmon_name;
platform_set_drvdata(pdev, adsp);

+ if (desc->is_wpss)
+ adsp->shutdown = qcom_wpss_shutdown;
+ else
+ adsp->shutdown = qcom_adsp_shutdown;
+
ret = adsp_alloc_memory_region(adsp);
if (ret)
goto free_rproc;
@@ -457,7 +608,13 @@ static int adsp_probe(struct platform_device *pdev)
if (ret)
goto free_rproc;

- pm_runtime_enable(adsp->dev);
+ ret = qcom_rproc_pds_attach(adsp->dev, adsp->proxy_pds,
+ desc->proxy_pd_names);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to attach proxy power domains\n");
+ goto free_rproc;
+ }
+ adsp->proxy_pd_count = ret;

ret = adsp_init_reset(adsp);
if (ret)
@@ -467,8 +624,8 @@ static int adsp_probe(struct platform_device *pdev)
if (ret)
goto disable_pm;

- ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem, NULL,
- qcom_adsp_pil_handover);
+ ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem,
+ desc->load_state, qcom_adsp_pil_handover);
if (ret)
goto disable_pm;

@@ -489,7 +646,8 @@ static int adsp_probe(struct platform_device *pdev)
return 0;

disable_pm:
- pm_runtime_disable(adsp->dev);
+ qcom_rproc_pds_detach(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+
free_rproc:
rproc_free(rproc);

@@ -506,7 +664,7 @@ static int adsp_remove(struct platform_device *pdev)
qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
qcom_remove_sysmon_subdev(adsp->sysmon);
qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
- pm_runtime_disable(adsp->dev);
+ qcom_rproc_pds_detach(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
rproc_free(adsp->rproc);

return 0;
@@ -518,11 +676,16 @@ static const struct adsp_pil_data adsp_resource_init = {
.ssr_name = "lpass",
.sysmon_name = "adsp",
.ssctl_id = 0x14,
+ .is_wpss = false,
+ .auto_boot = true,
.clk_ids = (const char*[]) {
"sway_cbcr", "lpass_ahbs_aon_cbcr", "lpass_ahbm_aon_cbcr",
"qdsp6ss_xo", "qdsp6ss_sleep", "qdsp6ss_core", NULL
},
.num_clks = 7,
+ .proxy_pd_names = (const char*[]) {
+ "cx", NULL
+ },
};

static const struct adsp_pil_data cdsp_resource_init = {
@@ -531,15 +694,39 @@ static const struct adsp_pil_data cdsp_resource_init = {
.ssr_name = "cdsp",
.sysmon_name = "cdsp",
.ssctl_id = 0x17,
+ .is_wpss = false,
+ .auto_boot = true,
.clk_ids = (const char*[]) {
"sway", "tbu", "bimc", "ahb_aon", "q6ss_slave", "q6ss_master",
"q6_axim", NULL
},
.num_clks = 7,
+ .proxy_pd_names = (const char*[]) {
+ "cx", NULL
+ },
+};
+
+static const struct adsp_pil_data wpss_resource_init = {
+ .crash_reason_smem = 626,
+ .firmware_name = "wpss.mdt",
+ .ssr_name = "wpss",
+ .sysmon_name = "wpss",
+ .ssctl_id = 0x19,
+ .is_wpss = true,
+ .auto_boot = false,
+ .load_state = "wpss",
+ .clk_ids = (const char*[]) {
+ "ahb_bdg", "ahb", "rscp", NULL
+ },
+ .num_clks = 3,
+ .proxy_pd_names = (const char*[]) {
+ "cx", "mx", NULL
+ },
};

static const struct of_device_id adsp_of_match[] = {
{ .compatible = "qcom,qcs404-cdsp-pil", .data = &cdsp_resource_init },
+ { .compatible = "qcom,sc7280-wpss-pil", .data = &wpss_resource_init },
{ .compatible = "qcom,sdm845-adsp-pil", .data = &adsp_resource_init },
{ },
};
--
2.7.4