1 files changed, 216 insertions, 20 deletions

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 471128a2e723..a1cc9cbe038f 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -68,14 +68,24 @@
 #define AXI_HALTREQ_REG			0x0
 #define AXI_HALTACK_REG			0x4
 #define AXI_IDLE_REG			0x8
+#define NAV_AXI_HALTREQ_BIT		BIT(0)
+#define NAV_AXI_HALTACK_BIT		BIT(1)
+#define NAV_AXI_IDLE_BIT		BIT(2)
+#define AXI_GATING_VALID_OVERRIDE	BIT(0)
 
-#define HALT_ACK_TIMEOUT_MS		100
+#define HALT_ACK_TIMEOUT_US		100000
+#define NAV_HALT_ACK_TIMEOUT_US		200
 
 /* QDSP6SS_RESET */
 #define Q6SS_STOP_CORE			BIT(0)
 #define Q6SS_CORE_ARES			BIT(1)
 #define Q6SS_BUS_ARES_ENABLE		BIT(2)
 
+/* QDSP6SS CBCR */
+#define Q6SS_CBCR_CLKEN			BIT(0)
+#define Q6SS_CBCR_CLKOFF		BIT(31)
+#define Q6SS_CBCR_TIMEOUT_US		200
+
 /* QDSP6SS_GFMUX_CTL */
 #define Q6SS_CLK_ENABLE			BIT(1)
 
@@ -96,15 +106,16 @@
 #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
 
 /* QDSP6v65 parameters */
+#define QDSP6SS_CORE_CBCR		0x20
 #define QDSP6SS_SLEEP                   0x3C
 #define QDSP6SS_BOOT_CORE_START         0x400
 #define QDSP6SS_BOOT_CMD                0x404
-#define SLEEP_CHECK_MAX_LOOPS           200
+#define QDSP6SS_BOOT_STATUS		0x408
+#define BOOT_STATUS_TIMEOUT_US		200
 #define BOOT_FSM_TIMEOUT                10000
 
 struct reg_info {
@@ -131,6 +142,7 @@ struct rproc_hexagon_res {
 	int version;
 	bool need_mem_protection;
 	bool has_alt_reset;
+	bool has_halt_nav;
 };
 
 struct q6v5 {
@@ -141,9 +153,14 @@ struct q6v5 {
 	void __iomem *rmb_base;
 
 	struct regmap *halt_map;
+	struct regmap *halt_nav_map;
+	struct regmap *conn_map;
+
 	u32 halt_q6;
 	u32 halt_modem;
 	u32 halt_nc;
+	u32 halt_nav;
+	u32 conn_box;
 
 	struct reset_control *mss_restart;
 	struct reset_control *pdc_reset;
@@ -187,6 +204,7 @@ struct q6v5 {
 	struct qcom_sysmon *sysmon;
 	bool need_mem_protection;
 	bool has_alt_reset;
+	bool has_halt_nav;
 	int mpss_perm;
 	int mba_perm;
 	const char *hexagon_mdt_image;
@@ -198,6 +216,7 @@ enum {
 	MSS_MSM8974,
 	MSS_MSM8996,
 	MSS_MSM8998,
+	MSS_SC7180,
 	MSS_SDM845,
 };
 
@@ -396,6 +415,26 @@ static int q6v5_reset_assert(struct q6v5 *qproc)
 		reset_control_assert(qproc->pdc_reset);
 		ret = reset_control_reset(qproc->mss_restart);
 		reset_control_deassert(qproc->pdc_reset);
+	} else if (qproc->has_halt_nav) {
+		/*
+		 * When the AXI pipeline is being reset with the Q6 modem partly
+		 * operational there is possibility of AXI valid signal to
+		 * glitch, leading to spurious transactions and Q6 hangs. A work
+		 * around is employed by asserting the AXI_GATING_VALID_OVERRIDE
+		 * BIT before triggering Q6 MSS reset. Both the HALTREQ and
+		 * AXI_GATING_VALID_OVERRIDE are withdrawn post MSS assert
+		 * followed by a MSS deassert, while holding the PDC reset.
+		 */
+		reset_control_assert(qproc->pdc_reset);
+		regmap_update_bits(qproc->conn_map, qproc->conn_box,
+				   AXI_GATING_VALID_OVERRIDE, 1);
+		regmap_update_bits(qproc->halt_nav_map, qproc->halt_nav,
+				   NAV_AXI_HALTREQ_BIT, 0);
+		reset_control_assert(qproc->mss_restart);
+		reset_control_deassert(qproc->pdc_reset);
+		regmap_update_bits(qproc->conn_map, qproc->conn_box,
+				   AXI_GATING_VALID_OVERRIDE, 0);
+		ret = reset_control_deassert(qproc->mss_restart);
 	} else {
 		ret = reset_control_assert(qproc->mss_restart);
 	}
@@ -413,6 +452,8 @@ static int q6v5_reset_deassert(struct q6v5 *qproc)
 		ret = reset_control_reset(qproc->mss_restart);
 		writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
 		reset_control_deassert(qproc->pdc_reset);
+	} else if (qproc->has_halt_nav) {
+		ret = reset_control_reset(qproc->mss_restart);
 	} else {
 		ret = reset_control_deassert(qproc->mss_restart);
 	}
@@ -474,12 +515,12 @@ static int q6v5proc_reset(struct q6v5 *qproc)
 
 	if (qproc->version == MSS_SDM845) {
 		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
-		val |= 0x1;
+		val |= Q6SS_CBCR_CLKEN;
 		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
 
 		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_SLEEP,
-					 val, !(val & BIT(31)), 1,
-					 SLEEP_CHECK_MAX_LOOPS);
+					 val, !(val & Q6SS_CBCR_CLKOFF), 1,
+					 Q6SS_CBCR_TIMEOUT_US);
 		if (ret) {
 			dev_err(qproc->dev, "QDSP6SS Sleep clock timed out\n");
 			return -ETIMEDOUT;
@@ -500,6 +541,54 @@ static int q6v5proc_reset(struct q6v5 *qproc)
 		}
 
 		goto pbl_wait;
+	} else if (qproc->version == MSS_SC7180) {
+		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
+		val |= Q6SS_CBCR_CLKEN;
+		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
+
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_SLEEP,
+					 val, !(val & Q6SS_CBCR_CLKOFF), 1,
+					 Q6SS_CBCR_TIMEOUT_US);
+		if (ret) {
+			dev_err(qproc->dev, "QDSP6SS Sleep clock timed out\n");
+			return -ETIMEDOUT;
+		}
+
+		/* Turn on the XO clock needed for PLL setup */
+		val = readl(qproc->reg_base + QDSP6SS_XO_CBCR);
+		val |= Q6SS_CBCR_CLKEN;
+		writel(val, qproc->reg_base + QDSP6SS_XO_CBCR);
+
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_XO_CBCR,
+					 val, !(val & Q6SS_CBCR_CLKOFF), 1,
+					 Q6SS_CBCR_TIMEOUT_US);
+		if (ret) {
+			dev_err(qproc->dev, "QDSP6SS XO clock timed out\n");
+			return -ETIMEDOUT;
+		}
+
+		/* Configure Q6 core CBCR to auto-enable after reset sequence */
+		val = readl(qproc->reg_base + QDSP6SS_CORE_CBCR);
+		val |= Q6SS_CBCR_CLKEN;
+		writel(val, qproc->reg_base + QDSP6SS_CORE_CBCR);
+
+		/* De-assert the Q6 stop core signal */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CORE_START);
+
+		/* Trigger the boot FSM to start the Q6 out-of-reset sequence */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CMD);
+
+		/* Poll the QDSP6SS_BOOT_STATUS for FSM completion */
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_BOOT_STATUS,
+					 val, (val & BIT(0)) != 0, 1,
+					 BOOT_STATUS_TIMEOUT_US);
+		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 ||
 		   qproc->version == MSS_MSM8998) {
 		int mem_pwr_ctl;
@@ -515,13 +604,13 @@ static int q6v5proc_reset(struct q6v5 *qproc)
 
 		/* BHS require xo cbcr to be enabled */
 		val = readl(qproc->reg_base + QDSP6SS_XO_CBCR);
-		val |= 0x1;
+		val |= Q6SS_CBCR_CLKEN;
 		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);
+					 val, !(val & Q6SS_CBCR_CLKOFF), 1,
+					 Q6SS_CBCR_TIMEOUT_US);
 		if (ret) {
 			dev_err(qproc->dev,
 				"xo cbcr enabling timed out (rc:%d)\n", ret);
@@ -637,7 +726,6 @@ static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
 				   struct regmap *halt_map,
 				   u32 offset)
 {
-	unsigned long timeout;
 	unsigned int val;
 	int ret;
 
@@ -650,14 +738,8 @@ static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
 	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);
 
 	/* Wait for halt */
-	timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
-	for (;;) {
-		ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
-		if (ret || val || time_after(jiffies, timeout))
-			break;
-
-		msleep(1);
-	}
+	regmap_read_poll_timeout(halt_map, offset + AXI_HALTACK_REG, val,
+				 val, 1000, HALT_ACK_TIMEOUT_US);
 
 	ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
 	if (ret || !val)
@@ -667,6 +749,32 @@ static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
 	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
 }
 
+static void q6v5proc_halt_nav_axi_port(struct q6v5 *qproc,
+				       struct regmap *halt_map,
+				       u32 offset)
+{
+	unsigned int val;
+	int ret;
+
+	/* Check if we're already idle */
+	ret = regmap_read(halt_map, offset, &val);
+	if (!ret && (val & NAV_AXI_IDLE_BIT))
+		return;
+
+	/* Assert halt request */
+	regmap_update_bits(halt_map, offset, NAV_AXI_HALTREQ_BIT,
+			   NAV_AXI_HALTREQ_BIT);
+
+	/* Wait for halt ack*/
+	regmap_read_poll_timeout(halt_map, offset, val,
+				 (val & NAV_AXI_HALTACK_BIT),
+				 5, NAV_HALT_ACK_TIMEOUT_US);
+
+	ret = regmap_read(halt_map, offset, &val);
+	if (ret || !(val & NAV_AXI_IDLE_BIT))
+		dev_err(qproc->dev, "port failed halt\n");
+}
+
 static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
 {
 	unsigned long dma_attrs = DMA_ATTR_FORCE_CONTIGUOUS;
@@ -829,6 +937,9 @@ static int q6v5_mba_load(struct q6v5 *qproc)
 halt_axi_ports:
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
+	if (qproc->has_halt_nav)
+		q6v5proc_halt_nav_axi_port(qproc, qproc->halt_nav_map,
+					   qproc->halt_nav);
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
 
 reclaim_mba:
@@ -876,6 +987,9 @@ static void q6v5_mba_reclaim(struct q6v5 *qproc)
 
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
+	if (qproc->has_halt_nav)
+		q6v5proc_halt_nav_axi_port(qproc, qproc->halt_nav_map,
+					   qproc->halt_nav);
 	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
 	if (qproc->version == MSS_MSM8996) {
 		/*
@@ -1253,6 +1367,47 @@ static int q6v5_init_mem(struct q6v5 *qproc, struct platform_device *pdev)
 	qproc->halt_modem = args.args[1];
 	qproc->halt_nc = args.args[2];
 
+	if (qproc->has_halt_nav) {
+		struct platform_device *nav_pdev;
+
+		ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+						       "qcom,halt-nav-regs",
+						       1, 0, &args);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to parse halt-nav-regs\n");
+			return -EINVAL;
+		}
+
+		nav_pdev = of_find_device_by_node(args.np);
+		of_node_put(args.np);
+		if (!nav_pdev) {
+			dev_err(&pdev->dev, "failed to get mss clock device\n");
+			return -EPROBE_DEFER;
+		}
+
+		qproc->halt_nav_map = dev_get_regmap(&nav_pdev->dev, NULL);
+		if (!qproc->halt_nav_map) {
+			dev_err(&pdev->dev, "failed to get map from device\n");
+			return -EINVAL;
+		}
+		qproc->halt_nav = args.args[0];
+
+		ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+						       "qcom,halt-nav-regs",
+						       1, 1, &args);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to parse halt-nav-regs\n");
+			return -EINVAL;
+		}
+
+		qproc->conn_map = syscon_node_to_regmap(args.np);
+		of_node_put(args.np);
+		if (IS_ERR(qproc->conn_map))
+			return PTR_ERR(qproc->conn_map);
+
+		qproc->conn_box = args.args[0];
+	}
+
 	return 0;
 }
 
@@ -1327,7 +1482,7 @@ static int q6v5_init_reset(struct q6v5 *qproc)
 		return PTR_ERR(qproc->mss_restart);
 	}
 
-	if (qproc->has_alt_reset) {
+	if (qproc->has_alt_reset || qproc->has_halt_nav) {
 		qproc->pdc_reset = devm_reset_control_get_exclusive(qproc->dev,
 								    "pdc_reset");
 		if (IS_ERR(qproc->pdc_reset)) {
@@ -1426,6 +1581,7 @@ static int q6v5_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, qproc);
 
+	qproc->has_halt_nav = desc->has_halt_nav;
 	ret = q6v5_init_mem(qproc, pdev);
 	if (ret)
 		goto free_rproc;
@@ -1549,6 +1705,41 @@ static int q6v5_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct rproc_hexagon_res sc7180_mss = {
+	.hexagon_mba_image = "mba.mbn",
+	.proxy_clk_names = (char*[]){
+		"xo",
+		NULL
+	},
+	.reset_clk_names = (char*[]){
+		"iface",
+		"bus",
+		"snoc_axi",
+		NULL
+	},
+	.active_clk_names = (char*[]){
+		"mnoc_axi",
+		"nav",
+		"mss_nav",
+		"mss_crypto",
+		NULL
+	},
+	.active_pd_names = (char*[]){
+		"load_state",
+		NULL
+	},
+	.proxy_pd_names = (char*[]){
+		"cx",
+		"mx",
+		"mss",
+		NULL
+	},
+	.need_mem_protection = true,
+	.has_alt_reset = false,
+	.has_halt_nav = true,
+	.version = MSS_SC7180,
+};
+
 static const struct rproc_hexagon_res sdm845_mss = {
 	.hexagon_mba_image = "mba.mbn",
 	.proxy_clk_names = (char*[]){
@@ -1580,6 +1771,7 @@ static const struct rproc_hexagon_res sdm845_mss = {
 	},
 	.need_mem_protection = true,
 	.has_alt_reset = true,
+	.has_halt_nav = false,
 	.version = MSS_SDM845,
 };
 
@@ -1594,7 +1786,6 @@ static const struct rproc_hexagon_res msm8998_mss = {
 	.active_clk_names = (char*[]){
 			"iface",
 			"bus",
-			"mem",
 			"gpll0_mss",
 			"mnoc_axi",
 			"snoc_axi",
@@ -1607,6 +1798,7 @@ static const struct rproc_hexagon_res msm8998_mss = {
 	},
 	.need_mem_protection = true,
 	.has_alt_reset = false,
+	.has_halt_nav = false,
 	.version = MSS_MSM8998,
 };
 
@@ -1636,6 +1828,7 @@ static const struct rproc_hexagon_res msm8996_mss = {
 	},
 	.need_mem_protection = true,
 	.has_alt_reset = false,
+	.has_halt_nav = false,
 	.version = MSS_MSM8996,
 };
 
@@ -1668,6 +1861,7 @@ static const struct rproc_hexagon_res msm8916_mss = {
 	},
 	.need_mem_protection = false,
 	.has_alt_reset = false,
+	.has_halt_nav = false,
 	.version = MSS_MSM8916,
 };
 
@@ -1708,6 +1902,7 @@ static const struct rproc_hexagon_res msm8974_mss = {
 	},
 	.need_mem_protection = false,
 	.has_alt_reset = false,
+	.has_halt_nav = false,
 	.version = MSS_MSM8974,
 };
 
@@ -1717,6 +1912,7 @@ static const struct of_device_id q6v5_of_match[] = {
 	{ .compatible = "qcom,msm8974-mss-pil", .data = &msm8974_mss},
 	{ .compatible = "qcom,msm8996-mss-pil", .data = &msm8996_mss},
 	{ .compatible = "qcom,msm8998-mss-pil", .data = &msm8998_mss},
+	{ .compatible = "qcom,sc7180-mss-pil", .data = &sc7180_mss},
 	{ .compatible = "qcom,sdm845-mss-pil", .data = &sdm845_mss},
 	{ },
 };