Merge tag 'rproc-v4.18' of git://github.com/andersson/remoteproc

Pull remoteproc updates from Bjorn Andersson:
 "This brings a few minor fixes to the Davinci driver, drops a orphan
  include file from the StE cleanup done ealier and introduces support
  for booting the modem on Qualcomm's SDM845 platform"

* tag 'rproc-v4.18' of git://github.com/andersson/remoteproc:
  remoteproc: q6v5: Allow defining GLINK edge for mss remoteproc
  remoteproc: q6v5: Add support for mss remoteproc on SDM845
  remoteproc: q6v5: Introduce reset assert/deassert helper functions
  dt-bindings: remoteproc: Add Q6v5 Modem PIL binding for SDM845
  remoteproc: q6v5: Move proxy unvote to handover irq handler
  remoteproc: q6v5: Return irq from q6v5_request_irq()
  remoteproc/ste: remove abandoned include file
  remoteproc/davinci: use octal permissions for module_param()
  remoteproc/davinci: prepare and unprepare the clock where needed
  remoteproc/davinci: add the missing retval check for clk_enable()
  remoteproc: Remove depends on HAS_DMA in case of platform dependency
  remoteproc: Prevent incorrect rproc state on xfer mem ownership failure

5 files changed, 188 insertions, 83 deletions

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
index 00d3d58a102f..d90182425450 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
@@ -11,6 +11,7 @@ on the Qualcomm Hexagon core.
 		    "qcom,msm8916-mss-pil",
 		    "qcom,msm8974-mss-pil"
 		    "qcom,msm8996-mss-pil"
+		    "qcom,sdm845-mss-pil"
 
 - reg:
 	Usage: required
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 027274008b08..cd1c168fd188 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -24,7 +24,6 @@ config IMX_REMOTEPROC
 
 config OMAP_REMOTEPROC
 	tristate "OMAP remoteproc support"
-	depends on HAS_DMA
 	depends on ARCH_OMAP4 || SOC_OMAP5
 	depends on OMAP_IOMMU
 	select MAILBOX
diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index bf3b9034c319..b668e32996e2 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -25,7 +25,7 @@
 #include "remoteproc_internal.h"
 
 static char *da8xx_fw_name;
-module_param(da8xx_fw_name, charp, S_IRUGO);
+module_param(da8xx_fw_name, charp, 0444);
 MODULE_PARM_DESC(da8xx_fw_name,
 		 "Name of DSP firmware file in /lib/firmware (if not specified defaults to 'rproc-dsp-fw')");
 
@@ -138,6 +138,7 @@ static int da8xx_rproc_start(struct rproc *rproc)
 	struct device *dev = rproc->dev.parent;
 	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
 	struct clk *dsp_clk = drproc->dsp_clk;
+	int ret;
 
 	/* hw requires the start (boot) address be on 1KB boundary */
 	if (rproc->bootaddr & 0x3ff) {
@@ -148,7 +149,12 @@ static int da8xx_rproc_start(struct rproc *rproc)
 
 	writel(rproc->bootaddr, drproc->bootreg);
 
-	clk_enable(dsp_clk);
+	ret = clk_prepare_enable(dsp_clk);
+	if (ret) {
+		dev_err(dev, "clk_prepare_enable() failed: %d\n", ret);
+		return ret;
+	}
+
 	davinci_clk_reset_deassert(dsp_clk);
 
 	return 0;
@@ -159,7 +165,7 @@ static int da8xx_rproc_stop(struct rproc *rproc)
 	struct da8xx_rproc *drproc = rproc->priv;
 
 	davinci_clk_reset_assert(drproc->dsp_clk);
-	clk_disable(drproc->dsp_clk);
+	clk_disable_unprepare(drproc->dsp_clk);
 
 	return 0;
 }
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index cbbafdcaaecb..2190debf3d35 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -57,6 +57,8 @@
 #define RMB_PMI_META_DATA_REG		0x10
 #define RMB_PMI_CODE_START_REG		0x14
 #define RMB_PMI_CODE_LENGTH_REG		0x18
+#define RMB_MBA_MSS_STATUS		0x40
+#define RMB_MBA_ALT_RESET		0x44
 
 #define RMB_CMD_META_DATA_READY		0x1
 #define RMB_CMD_LOAD_READY		0x2
@@ -104,6 +106,13 @@
 #define QDSP6SS_XO_CBCR		0x0038
 #define QDSP6SS_ACC_OVERRIDE_VAL		0x20
 
+/* QDSP6v65 parameters */
+#define QDSP6SS_SLEEP                   0x3C
+#define QDSP6SS_BOOT_CORE_START         0x400
+#define QDSP6SS_BOOT_CMD                0x404
+#define SLEEP_CHECK_MAX_LOOPS           200
+#define BOOT_FSM_TIMEOUT                10000
+
 struct reg_info {
 	struct regulator *reg;
 	int uV;
@@ -121,9 +130,11 @@ struct rproc_hexagon_res {
 	struct qcom_mss_reg_res *proxy_supply;
 	struct qcom_mss_reg_res *active_supply;
 	char **proxy_clk_names;
+	char **reset_clk_names;
 	char **active_clk_names;
 	int version;
 	bool need_mem_protection;
+	bool has_alt_reset;
 };
 
 struct q6v5 {
@@ -143,9 +154,15 @@ struct q6v5 {
 	struct qcom_smem_state *state;
 	unsigned stop_bit;
 
+	int handover_irq;
+
+	bool proxy_unvoted;
+
 	struct clk *active_clks[8];
+	struct clk *reset_clks[4];
 	struct clk *proxy_clks[4];
 	int active_clk_count;
+	int reset_clk_count;
 	int proxy_clk_count;
 
 	struct reg_info active_regs[1];
@@ -166,10 +183,12 @@ struct q6v5 {
 	void *mpss_region;
 	size_t mpss_size;
 
+	struct qcom_rproc_glink glink_subdev;
 	struct qcom_rproc_subdev smd_subdev;
 	struct qcom_rproc_ssr ssr_subdev;
 	struct qcom_sysmon *sysmon;
 	bool need_mem_protection;
+	bool has_alt_reset;
 	int mpss_perm;
 	int mba_perm;
 	int version;
@@ -179,6 +198,7 @@ enum {
 	MSS_MSM8916,
 	MSS_MSM8974,
 	MSS_MSM8996,
+	MSS_SDM845,
 };
 
 static int q6v5_regulator_init(struct device *dev, struct reg_info *regs,
@@ -333,6 +353,29 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
 	return 0;
 }
 
+static int q6v5_reset_assert(struct q6v5 *qproc)
+{
+	if (qproc->has_alt_reset)
+		return reset_control_reset(qproc->mss_restart);
+	else
+		return reset_control_assert(qproc->mss_restart);
+}
+
+static int q6v5_reset_deassert(struct q6v5 *qproc)
+{
+	int ret;
+
+	if (qproc->has_alt_reset) {
+		writel(1, qproc->rmb_base + RMB_MBA_ALT_RESET);
+		ret = reset_control_reset(qproc->mss_restart);
+		writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
+	} else {
+		ret = reset_control_deassert(qproc->mss_restart);
+	}
+
+	return ret;
+}
+
 static int q6v5_rmb_pbl_wait(struct q6v5 *qproc, int ms)
 {
 	unsigned long timeout;
@@ -385,8 +428,35 @@ static int q6v5proc_reset(struct q6v5 *qproc)
 	int ret;
 	int i;
 
+	if (qproc->version == MSS_SDM845) {
+		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
+		val |= 0x1;
+		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
 
-	if (qproc->version == MSS_MSM8996) {
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_SLEEP,
+					 val, !(val & BIT(31)), 1,
+					 SLEEP_CHECK_MAX_LOOPS);
+		if (ret) {
+			dev_err(qproc->dev, "QDSP6SS Sleep clock timed out\n");
+			return -ETIMEDOUT;
+		}
+
+		/* De-assert QDSP6 stop core */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CORE_START);
+		/* Trigger boot FSM */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CMD);
+
+		ret = readl_poll_timeout(qproc->rmb_base + RMB_MBA_MSS_STATUS,
+				val, (val & BIT(0)) != 0, 10, BOOT_FSM_TIMEOUT);
+		if (ret) {
+			dev_err(qproc->dev, "Boot FSM failed to complete.\n");
+			/* Reset the modem so that boot FSM is in reset state */
+			q6v5_reset_deassert(qproc);
+			return ret;
+		}
+
+		goto pbl_wait;
+	} else if (qproc->version == MSS_MSM8996) {
 		/* Override the ACC value if required */
 		writel(QDSP6SS_ACC_OVERRIDE_VAL,
 		       qproc->reg_base + QDSP6SS_STRAP_ACC);
@@ -494,6 +564,7 @@ static int q6v5proc_reset(struct q6v5 *qproc)
 	val &= ~Q6SS_STOP_CORE;
 	writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
 
+pbl_wait:
 	/* Wait for PBL status */
 	ret = q6v5_rmb_pbl_wait(qproc, 1000);
 	if (ret == -ETIMEDOUT) {
@@ -727,11 +798,15 @@ static int q6v5_start(struct rproc *rproc)
 	int xfermemop_ret;
 	int ret;
 
+	qproc->proxy_unvoted = false;
+
+	enable_irq(qproc->handover_irq);
+
 	ret = q6v5_regulator_enable(qproc, qproc->proxy_regs,
 				    qproc->proxy_reg_count);
 	if (ret) {
 		dev_err(qproc->dev, "failed to enable proxy supplies\n");
-		return ret;
+		goto disable_irqs;
 	}
 
 	ret = q6v5_clk_enable(qproc->dev, qproc->proxy_clks,
@@ -747,12 +822,20 @@ static int q6v5_start(struct rproc *rproc)
 		dev_err(qproc->dev, "failed to enable supplies\n");
 		goto disable_proxy_clk;
 	}
-	ret = reset_control_deassert(qproc->mss_restart);
+
+	ret = q6v5_clk_enable(qproc->dev, qproc->reset_clks,
+			      qproc->reset_clk_count);
 	if (ret) {
-		dev_err(qproc->dev, "failed to deassert mss restart\n");
+		dev_err(qproc->dev, "failed to enable reset clocks\n");
 		goto disable_vdd;
 	}
 
+	ret = q6v5_reset_deassert(qproc);
+	if (ret) {
+		dev_err(qproc->dev, "failed to deassert mss restart\n");
+		goto disable_reset_clks;
+	}
+
 	ret = q6v5_clk_enable(qproc->dev, qproc->active_clks,
 			      qproc->active_clk_count);
 	if (ret) {
@@ -761,13 +844,11 @@ static int q6v5_start(struct rproc *rproc)
 	}
 
 	/* Assign MBA image access in DDR to q6 */
-	xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
-						qproc->mba_phys,
-						qproc->mba_size);
-	if (xfermemop_ret) {
+	ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+				      qproc->mba_phys, qproc->mba_size);
+	if (ret) {
 		dev_err(qproc->dev,
-			"assigning Q6 access to mba memory failed: %d\n",
-			xfermemop_ret);
+			"assigning Q6 access to mba memory failed: %d\n", ret);
 		goto disable_active_clks;
 	}
 
@@ -810,11 +891,6 @@ static int q6v5_start(struct rproc *rproc)
 			"Failed to reclaim mba buffer system may become unstable\n");
 	qproc->running = true;
 
-	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
-			 qproc->proxy_clk_count);
-	q6v5_regulator_disable(qproc, qproc->proxy_regs,
-			       qproc->proxy_reg_count);
-
 	return 0;
 
 reclaim_mpss:
@@ -842,7 +918,10 @@ disable_active_clks:
 			 qproc->active_clk_count);
 
 assert_reset:
-	reset_control_assert(qproc->mss_restart);
+	q6v5_reset_assert(qproc);
+disable_reset_clks:
+	q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+			 qproc->reset_clk_count);
 disable_vdd:
 	q6v5_regulator_disable(qproc, qproc->active_regs,
 			       qproc->active_reg_count);
@@ -853,6 +932,9 @@ disable_proxy_reg:
 	q6v5_regulator_disable(qproc, qproc->proxy_regs,
 			       qproc->proxy_reg_count);
 
+disable_irqs:
+	disable_irq(qproc->handover_irq);
+
 	return ret;
 }
 
@@ -892,7 +974,19 @@ static int q6v5_stop(struct rproc *rproc)
 				      qproc->mpss_phys, qproc->mpss_size);
 	WARN_ON(ret);
 
-	reset_control_assert(qproc->mss_restart);
+	q6v5_reset_assert(qproc);
+
+	disable_irq(qproc->handover_irq);
+
+	if (!qproc->proxy_unvoted) {
+		q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+				 qproc->proxy_clk_count);
+		q6v5_regulator_disable(qproc, qproc->proxy_regs,
+				       qproc->proxy_reg_count);
+	}
+
+	q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+			 qproc->reset_clk_count);
 	q6v5_clk_disable(qproc->dev, qproc->active_clks,
 			 qproc->active_clk_count);
 	q6v5_regulator_disable(qproc, qproc->active_regs,
@@ -960,7 +1054,7 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *dev)
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
+static irqreturn_t q6v5_ready_interrupt(int irq, void *dev)
 {
 	struct q6v5 *qproc = dev;
 
@@ -968,6 +1062,20 @@ static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
+{
+	struct q6v5 *qproc = dev;
+
+	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+			 qproc->proxy_clk_count);
+	q6v5_regulator_disable(qproc, qproc->proxy_regs,
+			       qproc->proxy_reg_count);
+
+	qproc->proxy_unvoted = true;
+
+	return IRQ_HANDLED;
+}
+
 static irqreturn_t q6v5_stop_ack_interrupt(int irq, void *dev)
 {
 	struct q6v5 *qproc = dev;
@@ -1051,22 +1159,23 @@ static int q6v5_request_irq(struct q6v5 *qproc,
 			     const char *name,
 			     irq_handler_t thread_fn)
 {
+	int irq;
 	int ret;
 
-	ret = platform_get_irq_byname(pdev, name);
-	if (ret < 0) {
+	irq = platform_get_irq_byname(pdev, name);
+	if (irq < 0) {
 		dev_err(&pdev->dev, "no %s IRQ defined\n", name);
-		return ret;
+		return irq;
 	}
 
-	ret = devm_request_threaded_irq(&pdev->dev, ret,
+	ret = devm_request_threaded_irq(&pdev->dev, irq,
 					NULL, thread_fn,
 					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 					"q6v5", qproc);
 	if (ret)
 		dev_err(&pdev->dev, "request %s IRQ failed\n", name);
 
-	return ret;
+	return ret ? : irq;
 }
 
 static int q6v5_alloc_memory_region(struct q6v5 *qproc)
@@ -1157,6 +1266,14 @@ static int q6v5_probe(struct platform_device *pdev)
 	}
 	qproc->proxy_clk_count = ret;
 
+	ret = q6v5_init_clocks(&pdev->dev, qproc->reset_clks,
+			       desc->reset_clk_names);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get reset clocks.\n");
+		goto free_rproc;
+	}
+	qproc->reset_clk_count = ret;
+
 	ret = q6v5_init_clocks(&pdev->dev, qproc->active_clks,
 			       desc->active_clk_names);
 	if (ret < 0) {
@@ -1186,6 +1303,7 @@ static int q6v5_probe(struct platform_device *pdev)
 		goto free_rproc;
 
 	qproc->version = desc->version;
+	qproc->has_alt_reset = desc->has_alt_reset;
 	qproc->need_mem_protection = desc->need_mem_protection;
 	ret = q6v5_request_irq(qproc, pdev, "wdog", q6v5_wdog_interrupt);
 	if (ret < 0)
@@ -1195,9 +1313,15 @@ static int q6v5_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto free_rproc;
 
+	ret = q6v5_request_irq(qproc, pdev, "ready", q6v5_ready_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+
 	ret = q6v5_request_irq(qproc, pdev, "handover", q6v5_handover_interrupt);
 	if (ret < 0)
 		goto free_rproc;
+	qproc->handover_irq = ret;
+	disable_irq(qproc->handover_irq);
 
 	ret = q6v5_request_irq(qproc, pdev, "stop-ack", q6v5_stop_ack_interrupt);
 	if (ret < 0)
@@ -1210,6 +1334,7 @@ static int q6v5_probe(struct platform_device *pdev)
 	}
 	qproc->mpss_perm = BIT(QCOM_SCM_VMID_HLOS);
 	qproc->mba_perm = BIT(QCOM_SCM_VMID_HLOS);
+	qcom_add_glink_subdev(rproc, &qproc->glink_subdev);
 	qcom_add_smd_subdev(rproc, &qproc->smd_subdev);
 	qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss");
 	qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
@@ -1233,6 +1358,7 @@ static int q6v5_remove(struct platform_device *pdev)
 	rproc_del(qproc->rproc);
 
 	qcom_remove_sysmon_subdev(qproc->sysmon);
+	qcom_remove_glink_subdev(qproc->rproc, &qproc->glink_subdev);
 	qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
 	qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
 	rproc_free(qproc->rproc);
@@ -1240,6 +1366,31 @@ static int q6v5_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct rproc_hexagon_res sdm845_mss = {
+	.hexagon_mba_image = "mba.mbn",
+	.proxy_clk_names = (char*[]){
+			"xo",
+			"axis2",
+			"prng",
+			NULL
+	},
+	.reset_clk_names = (char*[]){
+			"iface",
+			"snoc_axi",
+			NULL
+	},
+	.active_clk_names = (char*[]){
+			"bus",
+			"mem",
+			"gpll0_mss",
+			"mnoc_axi",
+			NULL
+	},
+	.need_mem_protection = true,
+	.has_alt_reset = true,
+	.version = MSS_SDM845,
+};
+
 static const struct rproc_hexagon_res msm8996_mss = {
 	.hexagon_mba_image = "mba.mbn",
 	.proxy_clk_names = (char*[]){
@@ -1255,6 +1406,7 @@ static const struct rproc_hexagon_res msm8996_mss = {
 			NULL
 	},
 	.need_mem_protection = true,
+	.has_alt_reset = false,
 	.version = MSS_MSM8996,
 };
 
@@ -1286,6 +1438,7 @@ static const struct rproc_hexagon_res msm8916_mss = {
 		NULL
 	},
 	.need_mem_protection = false,
+	.has_alt_reset = false,
 	.version = MSS_MSM8916,
 };
 
@@ -1325,6 +1478,7 @@ static const struct rproc_hexagon_res msm8974_mss = {
 		NULL
 	},
 	.need_mem_protection = false,
+	.has_alt_reset = false,
 	.version = MSS_MSM8974,
 };
 
@@ -1333,6 +1487,7 @@ static const struct of_device_id q6v5_of_match[] = {
 	{ .compatible = "qcom,msm8916-mss-pil", .data = &msm8916_mss},
 	{ .compatible = "qcom,msm8974-mss-pil", .data = &msm8974_mss},
 	{ .compatible = "qcom,msm8996-mss-pil", .data = &msm8996_mss},
+	{ .compatible = "qcom,sdm845-mss-pil", .data = &sdm845_mss},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, q6v5_of_match);
diff --git a/include/linux/ste_modem_shm.h b/include/linux/ste_modem_shm.h
deleted file mode 100644
index 8444a4eff1bb..000000000000
--- a/include/linux/ste_modem_shm.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) ST-Ericsson AB 2012
- * Author: Sjur Brendeland / sjur.brandeland@stericsson.com
- *
- * License terms: GNU General Public License (GPL) version 2
- */
-
-#ifndef __INC_MODEM_DEV_H
-#define __INC_MODEM_DEV_H
-#include <linux/types.h>
-#include <linux/platform_device.h>
-
-struct ste_modem_device;
-
-/**
- * struct ste_modem_dev_cb - Callbacks for modem initiated events.
- * @kick: Called when the modem kicks the host.
- *
- * This structure contains callbacks for actions triggered by the modem.
- */
-struct ste_modem_dev_cb {
-	void (*kick)(struct ste_modem_device *mdev, int notify_id);
-};
-
-/**
- * struct ste_modem_dev_ops - Functions to control modem and modem interface.
- *
- * @power:	Main power switch, used for cold-start or complete power off.
- * @kick:	Kick the modem.
- * @kick_subscribe: Subscribe for notifications from the modem.
- * @setup:	Provide callback functions to modem device.
- *
- * This structure contains functions used by the ste remoteproc driver
- * to manage the modem.
- */
-struct ste_modem_dev_ops {
-	int (*power)(struct ste_modem_device *mdev, bool on);
-	int (*kick)(struct ste_modem_device *mdev, int notify_id);
-	int (*kick_subscribe)(struct ste_modem_device *mdev, int notify_id);
-	int (*setup)(struct ste_modem_device *mdev,
-		     struct ste_modem_dev_cb *cfg);
-};
-
-/**
- * struct ste_modem_device - represent the STE modem device
- * @pdev: Reference to platform device
- * @ops: Operations used to manage the modem.
- * @drv_data: Driver private data.
- */
-struct ste_modem_device {
-	struct platform_device pdev;
-	struct ste_modem_dev_ops ops;
-	void *drv_data;
-};
-
-#endif /*INC_MODEM_DEV_H*/