1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.c b/drivers/media/platform/qcom/iris/iris_vpu_common.c
new file mode 100644
index 000000000000..fe9896d66848
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/iris_vpu_common.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/iopoll.h>
+#include <linux/pm_opp.h>
+#include <linux/reset.h>
+
+#include "iris_core.h"
+#include "iris_vpu_common.h"
+#include "iris_vpu_register_defines.h"
+
+#define WRAPPER_TZ_BASE_OFFS			0x000C0000
+#define AON_BASE_OFFS				0x000E0000
+
+#define CPU_IC_BASE_OFFS			(CPU_BASE_OFFS)
+
+#define CPU_CS_A2HSOFTINTCLR			(CPU_CS_BASE_OFFS + 0x1C)
+#define CLEAR_XTENSA2HOST_INTR			BIT(0)
+
+#define CTRL_INIT				(CPU_CS_BASE_OFFS + 0x48)
+#define CTRL_STATUS				(CPU_CS_BASE_OFFS + 0x4C)
+
+#define CTRL_INIT_IDLE_MSG_BMSK			0x40000000
+#define CTRL_ERROR_STATUS__M			0xfe
+#define CTRL_STATUS_PC_READY			0x100
+
+#define QTBL_INFO				(CPU_CS_BASE_OFFS + 0x50)
+#define QTBL_ENABLE				BIT(0)
+
+#define QTBL_ADDR				(CPU_CS_BASE_OFFS + 0x54)
+#define CPU_CS_SCIACMDARG3			(CPU_CS_BASE_OFFS + 0x58)
+#define SFR_ADDR				(CPU_CS_BASE_OFFS + 0x5C)
+#define UC_REGION_ADDR				(CPU_CS_BASE_OFFS + 0x64)
+#define UC_REGION_SIZE				(CPU_CS_BASE_OFFS + 0x68)
+
+#define CPU_CS_H2XSOFTINTEN			(CPU_CS_BASE_OFFS + 0x148)
+#define HOST2XTENSA_INTR_ENABLE			BIT(0)
+
+#define CPU_CS_X2RPMH				(CPU_CS_BASE_OFFS + 0x168)
+#define MSK_SIGNAL_FROM_TENSILICA		BIT(0)
+#define MSK_CORE_POWER_ON			BIT(1)
+
+#define CPU_IC_SOFTINT				(CPU_IC_BASE_OFFS + 0x150)
+#define CPU_IC_SOFTINT_H2A_SHFT			0x0
+
+#define WRAPPER_INTR_STATUS			(WRAPPER_BASE_OFFS + 0x0C)
+#define WRAPPER_INTR_STATUS_A2HWD_BMSK		BIT(3)
+#define WRAPPER_INTR_STATUS_A2H_BMSK		BIT(2)
+
+#define WRAPPER_INTR_MASK			(WRAPPER_BASE_OFFS + 0x10)
+#define WRAPPER_INTR_MASK_A2HWD_BMSK		BIT(3)
+#define WRAPPER_INTR_MASK_A2HCPU_BMSK		BIT(2)
+
+#define WRAPPER_DEBUG_BRIDGE_LPI_CONTROL	(WRAPPER_BASE_OFFS + 0x54)
+#define WRAPPER_DEBUG_BRIDGE_LPI_STATUS		(WRAPPER_BASE_OFFS + 0x58)
+#define WRAPPER_IRIS_CPU_NOC_LPI_CONTROL	(WRAPPER_BASE_OFFS + 0x5C)
+#define WRAPPER_IRIS_CPU_NOC_LPI_STATUS		(WRAPPER_BASE_OFFS + 0x60)
+
+#define WRAPPER_TZ_CPU_STATUS			(WRAPPER_TZ_BASE_OFFS + 0x10)
+#define WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG		(WRAPPER_TZ_BASE_OFFS + 0x14)
+#define CTL_AXI_CLK_HALT			BIT(0)
+#define CTL_CLK_HALT				BIT(1)
+
+#define WRAPPER_TZ_QNS4PDXFIFO_RESET		(WRAPPER_TZ_BASE_OFFS + 0x18)
+#define RESET_HIGH				BIT(0)
+
+#define AON_WRAPPER_MVP_NOC_LPI_CONTROL		(AON_BASE_OFFS)
+#define REQ_POWER_DOWN_PREP			BIT(0)
+
+#define AON_WRAPPER_MVP_NOC_LPI_STATUS		(AON_BASE_OFFS + 0x4)
+
+static void iris_vpu_interrupt_init(struct iris_core *core)
+{
+	u32 mask_val;
+
+	mask_val = readl(core->reg_base + WRAPPER_INTR_MASK);
+	mask_val &= ~(WRAPPER_INTR_MASK_A2HWD_BMSK |
+		      WRAPPER_INTR_MASK_A2HCPU_BMSK);
+	writel(mask_val, core->reg_base + WRAPPER_INTR_MASK);
+}
+
+static void iris_vpu_setup_ucregion_memory_map(struct iris_core *core)
+{
+	u32 queue_size, value;
+
+	/* Iris hardware requires 4K queue alignment */
+	queue_size = ALIGN(sizeof(struct iris_hfi_queue_table_header) +
+		(IFACEQ_QUEUE_SIZE * IFACEQ_NUMQ), SZ_4K);
+
+	value = (u32)core->iface_q_table_daddr;
+	writel(value, core->reg_base + UC_REGION_ADDR);
+
+	/* Iris hardware requires 1M queue alignment */
+	value = ALIGN(SFR_SIZE + queue_size, SZ_1M);
+	writel(value, core->reg_base + UC_REGION_SIZE);
+
+	value = (u32)core->iface_q_table_daddr;
+	writel(value, core->reg_base + QTBL_ADDR);
+
+	writel(QTBL_ENABLE, core->reg_base + QTBL_INFO);
+
+	if (core->sfr_daddr) {
+		value = (u32)core->sfr_daddr + core->iris_platform_data->core_arch;
+		writel(value, core->reg_base + SFR_ADDR);
+	}
+}
+
+int iris_vpu_boot_firmware(struct iris_core *core)
+{
+	u32 ctrl_init = BIT(0), ctrl_status = 0, count = 0, max_tries = 1000;
+
+	iris_vpu_setup_ucregion_memory_map(core);
+
+	writel(ctrl_init, core->reg_base + CTRL_INIT);
+	writel(0x1, core->reg_base + CPU_CS_SCIACMDARG3);
+
+	while (!ctrl_status && count < max_tries) {
+		ctrl_status = readl(core->reg_base + CTRL_STATUS);
+		if ((ctrl_status & CTRL_ERROR_STATUS__M) == 0x4) {
+			dev_err(core->dev, "invalid setting for uc_region\n");
+			break;
+		}
+
+		usleep_range(50, 100);
+		count++;
+	}
+
+	if (count >= max_tries) {
+		dev_err(core->dev, "error booting up iris firmware\n");
+		return -ETIME;
+	}
+
+	writel(HOST2XTENSA_INTR_ENABLE, core->reg_base + CPU_CS_H2XSOFTINTEN);
+	writel(0x0, core->reg_base + CPU_CS_X2RPMH);
+
+	return 0;
+}
+
+void iris_vpu_raise_interrupt(struct iris_core *core)
+{
+	writel(1 << CPU_IC_SOFTINT_H2A_SHFT, core->reg_base + CPU_IC_SOFTINT);
+}
+
+void iris_vpu_clear_interrupt(struct iris_core *core)
+{
+	u32 intr_status, mask;
+
+	intr_status = readl(core->reg_base + WRAPPER_INTR_STATUS);
+	mask = (WRAPPER_INTR_STATUS_A2H_BMSK |
+		WRAPPER_INTR_STATUS_A2HWD_BMSK |
+		CTRL_INIT_IDLE_MSG_BMSK);
+
+	if (intr_status & mask)
+		core->intr_status |= intr_status;
+
+	writel(CLEAR_XTENSA2HOST_INTR, core->reg_base + CPU_CS_A2HSOFTINTCLR);
+}
+
+int iris_vpu_watchdog(struct iris_core *core, u32 intr_status)
+{
+	if (intr_status & WRAPPER_INTR_STATUS_A2HWD_BMSK) {
+		dev_err(core->dev, "received watchdog interrupt\n");
+		return -ETIME;
+	}
+
+	return 0;
+}
+
+int iris_vpu_prepare_pc(struct iris_core *core)
+{
+	u32 wfi_status, idle_status, pc_ready;
+	u32 ctrl_status, val = 0;
+	int ret;
+
+	ctrl_status = readl(core->reg_base + CTRL_STATUS);
+	pc_ready = ctrl_status & CTRL_STATUS_PC_READY;
+	idle_status = ctrl_status & BIT(30);
+	if (pc_ready)
+		return 0;
+
+	wfi_status = readl(core->reg_base + WRAPPER_TZ_CPU_STATUS);
+	wfi_status &= BIT(0);
+	if (!wfi_status || !idle_status)
+		goto skip_power_off;
+
+	ret = core->hfi_ops->sys_pc_prep(core);
+	if (ret)
+		goto skip_power_off;
+
+	ret = readl_poll_timeout(core->reg_base + CTRL_STATUS, val,
+				 val & CTRL_STATUS_PC_READY, 250, 2500);
+	if (ret)
+		goto skip_power_off;
+
+	ret = readl_poll_timeout(core->reg_base + WRAPPER_TZ_CPU_STATUS,
+				 val, val & BIT(0), 250, 2500);
+	if (ret)
+		goto skip_power_off;
+
+	return 0;
+
+skip_power_off:
+	ctrl_status = readl(core->reg_base + CTRL_STATUS);
+	wfi_status = readl(core->reg_base + WRAPPER_TZ_CPU_STATUS);
+	wfi_status &= BIT(0);
+	dev_err(core->dev, "skip power collapse, wfi=%#x, idle=%#x, pcr=%#x, ctrl=%#x)\n",
+		wfi_status, idle_status, pc_ready, ctrl_status);
+
+	return -EAGAIN;
+}
+
+static int iris_vpu_power_off_controller(struct iris_core *core)
+{
+	u32 val = 0;
+	int ret;
+
+	writel(MSK_SIGNAL_FROM_TENSILICA | MSK_CORE_POWER_ON, core->reg_base + CPU_CS_X2RPMH);
+
+	writel(REQ_POWER_DOWN_PREP, core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
+
+	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_STATUS,
+				 val, val & BIT(0), 200, 2000);
+	if (ret)
+		goto disable_power;
+
+	writel(REQ_POWER_DOWN_PREP, core->reg_base + WRAPPER_IRIS_CPU_NOC_LPI_CONTROL);
+
+	ret = readl_poll_timeout(core->reg_base + WRAPPER_IRIS_CPU_NOC_LPI_STATUS,
+				 val, val & BIT(0), 200, 2000);
+	if (ret)
+		goto disable_power;
+
+	writel(0x0, core->reg_base + WRAPPER_DEBUG_BRIDGE_LPI_CONTROL);
+
+	ret = readl_poll_timeout(core->reg_base + WRAPPER_DEBUG_BRIDGE_LPI_STATUS,
+				 val, val == 0, 200, 2000);
+	if (ret)
+		goto disable_power;
+
+	writel(CTL_AXI_CLK_HALT | CTL_CLK_HALT,
+	       core->reg_base + WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG);
+	writel(RESET_HIGH, core->reg_base + WRAPPER_TZ_QNS4PDXFIFO_RESET);
+	writel(0x0, core->reg_base + WRAPPER_TZ_QNS4PDXFIFO_RESET);
+	writel(0x0, core->reg_base + WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG);
+
+disable_power:
+	iris_disable_unprepare_clock(core, IRIS_CTRL_CLK);
+	iris_disable_unprepare_clock(core, IRIS_AXI_CLK);
+	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_CTRL_POWER_DOMAIN]);
+
+	return 0;
+}
+
+void iris_vpu_power_off_hw(struct iris_core *core)
+{
+	dev_pm_genpd_set_hwmode(core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN], false);
+	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN]);
+	iris_disable_unprepare_clock(core, IRIS_HW_CLK);
+}
+
+void iris_vpu_power_off(struct iris_core *core)
+{
+	dev_pm_opp_set_rate(core->dev, 0);
+	core->iris_platform_data->vpu_ops->power_off_hw(core);
+	iris_vpu_power_off_controller(core);
+	iris_unset_icc_bw(core);
+
+	if (!iris_vpu_watchdog(core, core->intr_status))
+		disable_irq_nosync(core->irq);
+}
+
+static int iris_vpu_power_on_controller(struct iris_core *core)
+{
+	u32 rst_tbl_size = core->iris_platform_data->clk_rst_tbl_size;
+	int ret;
+
+	ret = iris_enable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_CTRL_POWER_DOMAIN]);
+	if (ret)
+		return ret;
+
+	ret = reset_control_bulk_reset(rst_tbl_size, core->resets);
+	if (ret)
+		goto err_disable_power;
+
+	ret = iris_prepare_enable_clock(core, IRIS_AXI_CLK);
+	if (ret)
+		goto err_disable_power;
+
+	ret = iris_prepare_enable_clock(core, IRIS_CTRL_CLK);
+	if (ret)
+		goto err_disable_clock;
+
+	return 0;
+
+err_disable_clock:
+	iris_disable_unprepare_clock(core, IRIS_AXI_CLK);
+err_disable_power:
+	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_CTRL_POWER_DOMAIN]);
+
+	return ret;
+}
+
+static int iris_vpu_power_on_hw(struct iris_core *core)
+{
+	int ret;
+
+	ret = iris_enable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN]);
+	if (ret)
+		return ret;
+
+	ret = iris_prepare_enable_clock(core, IRIS_HW_CLK);
+	if (ret)
+		goto err_disable_power;
+
+	ret = dev_pm_genpd_set_hwmode(core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN], true);
+	if (ret)
+		goto err_disable_clock;
+
+	return 0;
+
+err_disable_clock:
+	iris_disable_unprepare_clock(core, IRIS_HW_CLK);
+err_disable_power:
+	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN]);
+
+	return ret;
+}
+
+int iris_vpu_power_on(struct iris_core *core)
+{
+	u32 freq;
+	int ret;
+
+	ret = iris_set_icc_bw(core, INT_MAX);
+	if (ret)
+		goto err;
+
+	ret = iris_vpu_power_on_controller(core);
+	if (ret)
+		goto err_unvote_icc;
+
+	ret = iris_vpu_power_on_hw(core);
+	if (ret)
+		goto err_power_off_ctrl;
+
+	freq = core->power.clk_freq ? core->power.clk_freq :
+				      (u32)ULONG_MAX;
+
+	dev_pm_opp_set_rate(core->dev, freq);
+
+	core->iris_platform_data->set_preset_registers(core);
+
+	iris_vpu_interrupt_init(core);
+	core->intr_status = 0;
+	enable_irq(core->irq);
+
+	return 0;
+
+err_power_off_ctrl:
+	iris_vpu_power_off_controller(core);
+err_unvote_icc:
+	iris_unset_icc_bw(core);
+err:
+	dev_err(core->dev, "power on failed\n");
+
+	return ret;
+}