/*
 **************************************************************************
 * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all copies.
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 **************************************************************************
 */

/**
 * nss_hal_pvt.c
 *	NSS HAL private APIs.
 */

#include <linux/err.h>
#include <linux/version.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include "nss_hal.h"
#include "nss_core.h"

#define NSS_QGIC_IPC_REG_OFFSET 0x8

#define NSS0_H2N_INTR_BASE 13
#define NSS1_H2N_INTR_BASE 19

/*
 * Common CLKs
 */
#define NSS_NOC_CLK "nss-noc-clk"
#define NSS_PTP_REF_CLK "nss-ptp-ref-clk"
#define NSS_CSR_CLK "nss-csr-clk"
#define NSS_CFG_CLK "nss-cfg-clk"
#define NSS_IMEM_CLK "nss-imem-clk"
#define NSS_NSSNOC_QOSGEN_REF_CLK "nss-nssnoc-qosgen-ref-clk"
#define NSS_MEM_NOC_NSS_AXI_CLK "nss-mem-noc-nss-axi-clk"
#define NSS_NSSNOC_SNOC_CLK "nss-nssnoc-snoc-clk"
#define NSS_NSSNOC_TIMEOUT_REF_CLK "nss-nssnoc-timeout-ref-clk"
#define NSS_CE_AXI_CLK "nss-ce-axi-clk"
#define NSS_CE_APB_CLK "nss-ce-apb-clk"
#define NSS_NSSNOC_CE_AXI_CLK "nss-nssnoc-ce-axi-clk"
#define NSS_NSSNOC_CE_APB_CLK "nss-nssnoc-ce-apb-clk"

/*
 * Per-core CLKS
 */
#define NSS_NSSNOC_AHB_CLK "nss-nssnoc-ahb-clk"
#define NSS_CORE_CLK "nss-core-clk"
#define NSS_AHB_CLK "nss-ahb-clk"
#define NSS_AXI_CLK "nss-axi-clk"
#define NSS_MPT_CLK "nss-mpt-clk"
#define NSS_NC_AXI_CLK "nss-nc-axi-clk"

/*
 * Voltage values
 */
#define NOMINAL_VOLTAGE 1
#define TURBO_VOLTAGE 2

/*
 * Core reset part 1
 */
#define NSS_CORE_GCC_RESET_1 0x00000020

/*
 * Core reset part 2
 */
#define NSS_CORE_GCC_RESET_2 0x00000017

/*
 * Voltage regulator
 */
struct regulator *npu_reg;

/*
 * GCC reset
 */
void __iomem *nss_misc_reset;

/*
 * Purpose of each interrupt index: This should match the order defined in the NSS firmware
 */
enum nss_hal_n2h_intr_purpose {
	NSS_HAL_N2H_INTR_PURPOSE_EMPTY_BUFFER_SOS = 0,
	NSS_HAL_N2H_INTR_PURPOSE_EMPTY_BUFFER_QUEUE = 1,
	NSS_HAL_N2H_INTR_PURPOSE_TX_UNBLOCKED = 2,
	NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_0 = 3,
	NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_1 = 4,
	NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_2 = 5,
	NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_3 = 6,
	NSS_HAL_N2H_INTR_PURPOSE_COREDUMP_COMPLETE = 7,
	NSS_HAL_N2H_INTR_PURPOSE_PAGED_EMPTY_BUFFER_SOS = 8,
	NSS_HAL_N2H_INTR_PURPOSE_PROFILE_DMA = 9,
	NSS_HAL_N2H_INTR_PURPOSE_MAX
};

/*
 * Interrupt type to cause vector.
 */
static uint32_t intr_cause[NSS_MAX_CORES][NSS_H2N_INTR_TYPE_MAX] = {
				/* core0 */
				{(1 << (NSS0_H2N_INTR_BASE + NSS_H2N_INTR_EMPTY_BUFFER_QUEUE)),
				(1 << (NSS0_H2N_INTR_BASE + NSS_H2N_INTR_DATA_COMMAND_QUEUE)),
				(1 << (NSS0_H2N_INTR_BASE + NSS_H2N_INTR_TX_UNBLOCKED)),
				(1 << (NSS0_H2N_INTR_BASE + NSS_H2N_INTR_TRIGGER_COREDUMP)),
				(1 << (NSS0_H2N_INTR_BASE + NSS_H2N_INTR_EMPTY_PAGED_BUFFER_QUEUE))},
				/* core 1 */
				{(1 << (NSS1_H2N_INTR_BASE + NSS_H2N_INTR_EMPTY_BUFFER_QUEUE)),
				(1 << (NSS1_H2N_INTR_BASE + NSS_H2N_INTR_DATA_COMMAND_QUEUE)),
				(1 << (NSS1_H2N_INTR_BASE + NSS_H2N_INTR_TX_UNBLOCKED)),
				(1 << (NSS1_H2N_INTR_BASE + NSS_H2N_INTR_TRIGGER_COREDUMP)),
				(1 << (NSS1_H2N_INTR_BASE + NSS_H2N_INTR_EMPTY_PAGED_BUFFER_QUEUE))}
};

/*
 * nss_hal_wq_function()
 *	Added to Handle BH requests to kernel
 */
void nss_hal_wq_function(struct work_struct *work)
{
	nss_work_t *my_work = (nss_work_t *)work;

	mutex_lock(&nss_top_main.wq_lock);

	if (my_work->frequency > NSS_FREQ_1497) {
		regulator_set_voltage(npu_reg, TURBO_VOLTAGE, TURBO_VOLTAGE);
	}

	nss_freq_change(&nss_top_main.nss[NSS_CORE_0], my_work->frequency, my_work->stats_enable, 0);
	if (nss_top_main.nss[NSS_CORE_1].state == NSS_CORE_STATE_INITIALIZED) {
		nss_freq_change(&nss_top_main.nss[NSS_CORE_1], my_work->frequency, my_work->stats_enable, 0);
	}
	clk_set_rate(nss_core0_clk, my_work->frequency);

	nss_freq_change(&nss_top_main.nss[NSS_CORE_0], my_work->frequency, my_work->stats_enable, 1);
	if (nss_top_main.nss[NSS_CORE_1].state == NSS_CORE_STATE_INITIALIZED) {
		nss_freq_change(&nss_top_main.nss[NSS_CORE_1], my_work->frequency, my_work->stats_enable, 1);
	}

	clk_set_rate(nss_core1_clk, my_work->frequency);
	if (my_work->frequency <= NSS_FREQ_1497) {
		regulator_set_voltage(npu_reg, NOMINAL_VOLTAGE, NOMINAL_VOLTAGE);
	}

	mutex_unlock(&nss_top_main.wq_lock);
	kfree((void *)work);
}

/*
 * nss_hal_handle_irq()
 */
static irqreturn_t nss_hal_handle_irq(int irq, void *ctx)
{
	struct int_ctx_instance *int_ctx = (struct int_ctx_instance *) ctx;

	disable_irq_nosync(irq);
	napi_schedule(&int_ctx->napi);

	return IRQ_HANDLED;
}

/*
 * __nss_hal_of_get_pdata()
 *	Retrieve platform data from device node.
 */
static struct nss_platform_data *__nss_hal_of_get_pdata(struct platform_device *pdev)
{
	struct device_node *np = of_node_get(pdev->dev.of_node);
	struct nss_platform_data *npd;
	struct nss_ctx_instance *nss_ctx = NULL;
	struct nss_top_instance *nss_top = &nss_top_main;
	struct resource res_nphys, res_vphys, res_qgic_phys;
	int32_t i;

	npd = devm_kzalloc(&pdev->dev, sizeof(struct nss_platform_data), GFP_KERNEL);
	if (!npd) {
		return NULL;
	}

	if (of_property_read_u32(np, "qcom,id", &npd->id)
	    || of_property_read_u32(np, "qcom,load-addr", &npd->load_addr)
	    || of_property_read_u32(np, "qcom,num-queue", &npd->num_queue)
	    || of_property_read_u32(np, "qcom,num-irq", &npd->num_irq)) {
		pr_err("%s: error reading critical device node properties\n", np->name);
		goto out;
	}

	/*
	 * Read frequencies. If failure, load default values.
	 */
	of_property_read_u32(np, "qcom,low-frequency", &nss_runtime_samples.freq_scale[NSS_FREQ_LOW_SCALE].frequency);
	of_property_read_u32(np, "qcom,mid-frequency", &nss_runtime_samples.freq_scale[NSS_FREQ_MID_SCALE].frequency);
	of_property_read_u32(np, "qcom,max-frequency", &nss_runtime_samples.freq_scale[NSS_FREQ_HIGH_SCALE].frequency);

	if (npd->num_irq > NSS_MAX_IRQ_PER_CORE) {
		pr_err("%s: exceeds maximum interrupt numbers per core\n", np->name);
		goto out;
	}

	nss_ctx = &nss_top->nss[npd->id];
	nss_ctx->id = npd->id;

	if (of_address_to_resource(np, 0, &res_nphys) != 0) {
		nss_info_always("%px: nss%d: of_address_to_resource() fail for nphys\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	if (of_address_to_resource(np, 1, &res_vphys) != 0) {
		nss_info_always("%px: nss%d: of_address_to_resource() fail for vphys\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	if (of_address_to_resource(np, 2, &res_qgic_phys) != 0) {
		nss_info_always("%px: nss%d: of_address_to_resource() fail for qgic_phys\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	/*
	 * Save physical addresses
	 */
	npd->nphys = res_nphys.start;
	npd->vphys = res_vphys.start;
	npd->qgic_phys = res_qgic_phys.start;

	npd->nmap = ioremap_nocache(npd->nphys, resource_size(&res_nphys));
	if (!npd->nmap) {
		nss_info_always("%px: nss%d: ioremap() fail for nphys\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	nss_assert(npd->vphys);
	npd->vmap = ioremap_cache(npd->vphys, resource_size(&res_vphys));
	if (!npd->vmap) {
		nss_info_always("%px: nss%d: ioremap() fail for vphys\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	npd->qgic_map = ioremap_nocache(npd->qgic_phys, resource_size(&res_qgic_phys));
	if (!npd->qgic_map) {
		nss_info_always("%px: nss%d: ioremap() fail for qgic map\n", nss_ctx, nss_ctx->id);
		goto out;
	}

	/*
	 * Clear TCM memory used by this core
	 */
	for (i = 0; i < resource_size(&res_vphys) ; i += 4) {
		nss_write_32(npd->vmap, i, 0);
		NSS_CORE_DMA_CACHE_MAINT((npd->vmap + i), 4, DMA_TO_DEVICE);
	}
	NSS_CORE_DSB();

	/*
	 * Get IRQ numbers
	 */
	for (i = 0 ; i < npd->num_irq; i++) {
		npd->irq[i] = irq_of_parse_and_map(np, i);
		if (!npd->irq[i]) {
			nss_info_always("%px: nss%d: irq_of_parse_and_map() fail for irq %d\n", nss_ctx, nss_ctx->id, i);
			goto out;
		}
	}

	nss_hal_dt_parse_features(np, npd);

	of_node_put(np);
	return npd;

out:
	if (npd->nmap) {
		iounmap(npd->nmap);
	}

	if (npd->vmap) {
		iounmap(npd->vmap);
	}

	devm_kfree(&pdev->dev, npd);
	of_node_put(np);
	return NULL;
}

/*
 * __nss_hal_core_reset()
 */
static int __nss_hal_core_reset(struct platform_device *nss_dev, void __iomem *map, uint32_t addr, uint32_t clk_src)
{
	uint32_t value;

	/*
	 * De-assert reset for first set
	 */
	value = nss_read_32(nss_misc_reset, 0x0);
	value &= ~(NSS_CORE_GCC_RESET_1 << (nss_dev->id << 3));
	nss_write_32(nss_misc_reset, 0x0, value);

	/*
	 * Minimum 10 - 20 cycles delay is required after
	 * de-asserting UBI reset clamp
	 */
	usleep_range(10, 20);

	/*
	 * De-assert reset for second set
	 */
	value &= ~(NSS_CORE_GCC_RESET_2 << (nss_dev->id << 3));
	nss_write_32(nss_misc_reset, 0x0, value);

	/*
	 * Apply ubi32 core reset
	 */
	nss_write_32(map, NSS_REGS_RESET_CTRL_OFFSET, 1);

	/*
	 * Program address configuration
	 */
	nss_write_32(map, NSS_REGS_CORE_AMC_OFFSET, 1);
	nss_write_32(map, NSS_REGS_CORE_BAR_OFFSET, 0x3c000000);
	nss_write_32(map, NSS_REGS_CORE_BOOT_ADDR_OFFSET, addr);

	/*
	 * C2C interrupts are level sensitive
	 * Copy engine interrupts are level sensitive
	 */
	nss_write_32(map, NSS_REGS_CORE_INT_STAT2_TYPE_OFFSET, 0xFFFF);
	nss_write_32(map, NSS_REGS_CORE_INT_STAT3_TYPE_OFFSET, 0xFF);

	/*
	 * Enable Instruction Fetch range checking between 0x4000 0000 to 0xBFFF FFFF.
	 */
	nss_write_32(map, NSS_REGS_CORE_IFETCH_RANGE_OFFSET, 0xBF004001);

	/*
	 * De-assert ubi32 core reset
	 */
	nss_write_32(map, NSS_REGS_RESET_CTRL_OFFSET, 0);

	return 0;
}

/*
 * __nss_hal_debug_enable()
 *	Enable NSS debug
 */
static void __nss_hal_debug_enable(void)
{

}

/*
 * nss_hal_clock_set_and_enable()
 */
static int nss_hal_clock_set_and_enable(struct device *dev, const char *id, unsigned long rate)
{
	struct clk *nss_clk = NULL;
	int err;

	nss_clk = devm_clk_get(dev, id);
	if (IS_ERR(nss_clk)) {
		pr_err("%px: cannot get clock: %s\n", dev, id);
		return -EFAULT;
	}

	if (rate) {
		err = clk_set_rate(nss_clk, rate);
		if (err) {
			pr_err("%px: cannot set %s freq\n", dev, id);
			return -EFAULT;
		}
	}

	err = clk_prepare_enable(nss_clk);
	if (err) {
		pr_err("%px: cannot enable clock: %s\n", dev, id);
		return -EFAULT;
	}

	return 0;
}

/*
 * __nss_hal_common_reset
 *	Do reset/clock configuration common to all cores
 */
static int __nss_hal_common_reset(struct platform_device *nss_dev)
{
	struct device_node *cmn = NULL;
	struct resource res_nss_misc_reset;

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NOC_CLK, 461500000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_PTP_REF_CLK, 150000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CSR_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CFG_CLK, 100000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_IMEM_CLK, 400000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_QOSGEN_REF_CLK, 19200000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_MEM_NOC_NSS_AXI_CLK, 461500000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_SNOC_CLK, 266600000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_TIMEOUT_REF_CLK, 4800000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CE_AXI_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CE_APB_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_CE_AXI_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_CE_APB_CLK, 200000000)) {
		return -EFAULT;
	}

	/*
	 * Get reference to NSS common device node
	 */
	cmn = of_find_node_by_name(NULL, "nss-common");
	if (!cmn) {
		pr_err("%px: Unable to find nss-common node\n", nss_dev);
		return -EFAULT;
	}

	if (of_address_to_resource(cmn, 0, &res_nss_misc_reset) != 0) {
		pr_err("%px: of_address_to_resource() return error for nss_misc_reset\n", nss_dev);
		of_node_put(cmn);
		return -EFAULT;
	}
	of_node_put(cmn);

	nss_misc_reset = ioremap_nocache(res_nss_misc_reset.start, resource_size(&res_nss_misc_reset));
	if (!nss_misc_reset) {
		pr_err("%px: ioremap fail for nss_misc_reset\n", nss_dev);
		return -EFAULT;
	}

	nss_top_main.nss_hal_common_init_done = true;
	nss_info("nss_hal_common_reset Done\n");
	return 0;
}

/*
 * __nss_hal_clock_configure()
 */
static int __nss_hal_clock_configure(struct nss_ctx_instance *nss_ctx, struct platform_device *nss_dev, struct nss_platform_data *npd)
{
	uint32_t i;

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NSSNOC_AHB_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_AHB_CLK, 200000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_AXI_CLK, 461500000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_MPT_CLK, 25000000)) {
		return -EFAULT;
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_NC_AXI_CLK, 461500000)) {
		return -EFAULT;
	}

	/*
	 * For IPQ807x, any rate above 1497 is Turbo Voltage
	 * Temporary set the voltage to turbo till we start scaling frequenices.
	 * This is to ensure probing is safe and autoscaling will correct the voltage.
	 */
	if (!nss_ctx->id) {
		npu_reg = devm_regulator_get(&nss_dev->dev, "npu");
		if (IS_ERR(npu_reg)) {
			return PTR_ERR(npu_reg);
		}
		if (regulator_enable(npu_reg)) {
			return -EFAULT;
		}
		regulator_set_voltage(npu_reg, TURBO_VOLTAGE, TURBO_VOLTAGE);
	}

	/*
	 * No entries, then just load default
	 */
	if ((nss_runtime_samples.freq_scale[NSS_FREQ_LOW_SCALE].frequency == 0) ||
		(nss_runtime_samples.freq_scale[NSS_FREQ_MID_SCALE].frequency == 0) ||
		(nss_runtime_samples.freq_scale[NSS_FREQ_HIGH_SCALE].frequency == 0)) {
		nss_runtime_samples.freq_scale[NSS_FREQ_LOW_SCALE].frequency = NSS_FREQ_187;
		nss_runtime_samples.freq_scale[NSS_FREQ_MID_SCALE].frequency = NSS_FREQ_748;
		nss_runtime_samples.freq_scale[NSS_FREQ_HIGH_SCALE].frequency = NSS_FREQ_1497;
		nss_info_always("Running default frequencies\n");
	}

	/*
	 * Test frequency from dtsi, if fail, try to set default frequency.
	 */
	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CORE_CLK, nss_runtime_samples.freq_scale[NSS_FREQ_HIGH_SCALE].frequency)) {
		if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CORE_CLK, NSS_FREQ_1497)) {
			return -EFAULT;
		}
	}

	/*
	 * Setup ranges, test frequency, and display.
	 */
	for (i = 0; i < NSS_FREQ_MAX_SCALE; i++) {
		if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_187) {
			nss_runtime_samples.freq_scale[i].minimum = NSS_FREQ_187_MIN;
			nss_runtime_samples.freq_scale[i].maximum = NSS_FREQ_187_MAX;
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_748) {
			nss_runtime_samples.freq_scale[i].minimum = NSS_FREQ_748_MIN;
			nss_runtime_samples.freq_scale[i].maximum = NSS_FREQ_748_MAX;
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_1497) {
			nss_runtime_samples.freq_scale[i].minimum = NSS_FREQ_1497_MIN;
			nss_runtime_samples.freq_scale[i].maximum = NSS_FREQ_1497_MAX;
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_1689) {
			nss_runtime_samples.freq_scale[i].minimum = NSS_FREQ_1689_MIN;
			nss_runtime_samples.freq_scale[i].maximum = NSS_FREQ_1689_MAX;
		} else {
			nss_info_always("Frequency not found %d\n", nss_runtime_samples.freq_scale[i].frequency);
			return -EFAULT;
		}

		/*
		 * Test the frequency, if fail, then default to safe frequency and abort
		 */
		if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CORE_CLK, nss_runtime_samples.freq_scale[i].frequency)) {
			return -EFAULT;
		}
	}

	nss_info_always("Supported Frequencies - ");
	for (i = 0; i < NSS_FREQ_MAX_SCALE; i++) {
		if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_187) {
			nss_info_always("187.2 MHz ");
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_748) {
			nss_info_always("748.8 MHz ");
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_1497) {
			nss_info_always("1.4976 GHz ");
		} else if (nss_runtime_samples.freq_scale[i].frequency == NSS_FREQ_1689) {
			nss_info_always("1.6896 GHz ");
		} else {
			nss_info_always("Error\nNo Table/Invalid Frequency Found\n");
			return -EFAULT;
		}
	}
	nss_info_always("\n");

	/*
	 * Set values only once for core0. Grab the proper clock.
	 */
	if (nss_ctx->id) {
		nss_core1_clk = clk_get(&nss_dev->dev, NSS_CORE_CLK);
	} else {
		nss_core0_clk = clk_get(&nss_dev->dev, NSS_CORE_CLK);
	}

	if (nss_hal_clock_set_and_enable(&nss_dev->dev, NSS_CORE_CLK, nss_runtime_samples.freq_scale[NSS_FREQ_MID_SCALE].frequency)) {
		return -EFAULT;
	}

	return 0;
}

/*
 * __nss_hal_read_interrupt_cause()
 */
static void __nss_hal_read_interrupt_cause(struct nss_ctx_instance *nss_ctx, uint32_t shift_factor, uint32_t *cause)
{
}

/*
 * __nss_hal_clear_interrupt_cause()
 */
static void __nss_hal_clear_interrupt_cause(struct nss_ctx_instance *nss_ctx, uint32_t shift_factor, uint32_t cause)
{
}

/*
 * __nss_hal_disable_interrupt()
 */
static void __nss_hal_disable_interrupt(struct nss_ctx_instance *nss_ctx, uint32_t shift_factor, uint32_t cause)
{
}

/*
 * __nss_hal_enable_interrupt()
 */
static void __nss_hal_enable_interrupt(struct nss_ctx_instance *nss_ctx, uint32_t shift_factor, uint32_t cause)
{
}

/*
 * __nss_hal_send_interrupt()
 */
static void __nss_hal_send_interrupt(struct nss_ctx_instance *nss_ctx, uint32_t type)
{
	/*
	 * Check if core and type is Valid
	 */
	nss_assert(nss_ctx->id < nss_top_main.num_nss);
	nss_assert(type < NSS_H2N_INTR_TYPE_MAX);

	nss_write_32(nss_ctx->qgic_map, NSS_QGIC_IPC_REG_OFFSET, intr_cause[nss_ctx->id][type]);
}

/*
 * __nss_hal_request_irq()
 */
static int __nss_hal_request_irq(struct nss_ctx_instance *nss_ctx, struct nss_platform_data *npd, int irq_num)
{
	struct int_ctx_instance *int_ctx = &nss_ctx->int_ctx[irq_num];
	int err = -1, irq = npd->irq[irq_num];

	irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY);

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_EMPTY_BUFFER_SOS) {
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_non_queue, NSS_EMPTY_BUFFER_SOS_PROCESSING_WEIGHT);
		int_ctx->cause = NSS_N2H_INTR_EMPTY_BUFFERS_SOS;
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_empty_buf_sos", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_EMPTY_BUFFER_QUEUE) {
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_queue, NSS_EMPTY_BUFFER_RETURN_PROCESSING_WEIGHT);
		int_ctx->cause = NSS_N2H_INTR_EMPTY_BUFFER_QUEUE;
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_empty_buf_queue", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_TX_UNBLOCKED) {
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_non_queue, NSS_TX_UNBLOCKED_PROCESSING_WEIGHT);
		int_ctx->cause = NSS_N2H_INTR_TX_UNBLOCKED;
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss-tx-unblock", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_0) {
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_queue, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		int_ctx->cause = NSS_N2H_INTR_DATA_QUEUE_0;
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_queue0", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_1) {
		int_ctx->cause = NSS_N2H_INTR_DATA_QUEUE_1;
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_queue, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_queue1", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_2) {
		int_ctx->cause = NSS_N2H_INTR_DATA_QUEUE_2;
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_queue, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_queue2", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_DATA_QUEUE_3) {
		int_ctx->cause = NSS_N2H_INTR_DATA_QUEUE_3;
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_queue, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_queue3", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_COREDUMP_COMPLETE) {
		int_ctx->cause = NSS_N2H_INTR_COREDUMP_COMPLETE;
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_emergency, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_coredump_complete", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_PAGED_EMPTY_BUFFER_SOS) {
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_non_queue, NSS_EMPTY_BUFFER_SOS_PROCESSING_WEIGHT);
		int_ctx->cause = NSS_N2H_INTR_PAGED_EMPTY_BUFFERS_SOS;
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_paged_empty_buf_sos", int_ctx);
	}

	if (irq_num == NSS_HAL_N2H_INTR_PURPOSE_PROFILE_DMA) {
		int_ctx->cause = NSS_N2H_INTR_PROFILE_DMA;
		netif_napi_add(&nss_ctx->napi_ndev, &int_ctx->napi, nss_core_handle_napi_sdma, NSS_DATA_COMMAND_BUFFER_PROCESSING_WEIGHT);
		err = request_irq(irq, nss_hal_handle_irq, 0, "nss_profile_dma", int_ctx);
	}

	if (err) {
		return err;
	}

	int_ctx->irq = irq;
	return 0;
}

/*
 * __nss_hal_init_imem
 */
void __nss_hal_init_imem(struct nss_ctx_instance *nss_ctx)
{
	struct nss_meminfo_ctx *mem_ctx = &nss_ctx->meminfo_ctx;

	mem_ctx->imem_head = NSS_IMEM_START + NSS_IMEM_SIZE * nss_ctx->id;
	mem_ctx->imem_end = mem_ctx->imem_head + NSS_IMEM_SIZE;
	mem_ctx->imem_tail = mem_ctx->imem_head;

	nss_info("%px: IMEM init: head: 0x%x end: 0x%x tail: 0x%x\n", nss_ctx,
			mem_ctx->imem_head, mem_ctx->imem_end, mem_ctx->imem_tail);
}

/*
 * __nss_hal_init_utcm_shared
 */
bool __nss_hal_init_utcm_shared(struct nss_ctx_instance *nss_ctx, uint32_t *meminfo_start)
{
	/*
	 * Nothing to be done as there are no TCM in ipq807x
	 */
	return true;
}

/*
 * nss_hal_ipq807x_ops
 */
struct nss_hal_ops nss_hal_ipq807x_ops = {
	.common_reset = __nss_hal_common_reset,
	.core_reset = __nss_hal_core_reset,
	.clock_configure = __nss_hal_clock_configure,
	.firmware_load = nss_hal_firmware_load,
	.debug_enable = __nss_hal_debug_enable,
	.of_get_pdata = __nss_hal_of_get_pdata,
	.request_irq = __nss_hal_request_irq,
	.send_interrupt = __nss_hal_send_interrupt,
	.enable_interrupt = __nss_hal_enable_interrupt,
	.disable_interrupt = __nss_hal_disable_interrupt,
	.clear_interrupt_cause = __nss_hal_clear_interrupt_cause,
	.read_interrupt_cause = __nss_hal_read_interrupt_cause,
	.init_imem = __nss_hal_init_imem,
	.init_utcm_shared = __nss_hal_init_utcm_shared,
};