soundwire.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi_soundwire.h>
#include <console/console.h>
#include <device/mmio.h>
#include <device/soundwire.h>
#include <drivers/intel/soundwire/soundwire.h>
#include <intelblocks/pmclib.h>
#include <stddef.h>
#include <string.h>
 
static const struct soundwire_link link_xtal_38_4 = {
        .clock_stop_mode0_supported = 1,
        .clock_stop_mode1_supported = 1,
        .clock_frequencies_supported_count = 1,
        .clock_frequencies_supported = { 4800 * KHz },
        .default_frame_rate = 48 * KHz,
        .default_frame_row_size = 50,
        .default_frame_col_size = 4,
        .dynamic_frame_shape = 1,
        .command_error_threshold = 16,
};
 
static const struct soundwire_link link_xtal_24 = {
        .clock_stop_mode0_supported = 1,
        .clock_stop_mode1_supported = 1,
        .clock_frequencies_supported_count = 1,
        .clock_frequencies_supported = { 6 * MHz },
        .default_frame_rate = 48 * KHz,
        .default_frame_row_size = 125,
        .default_frame_col_size = 2,
        .dynamic_frame_shape = 1,
        .command_error_threshold = 16,
};
 
static struct intel_soundwire_controller intel_controller = {
        .acpi_address = 0x40000000,
        .sdw = {
                .master_list_count = 4
        }
};
 
int soc_fill_soundwire_controller(struct intel_soundwire_controller **controller)
{
        const struct soundwire_link *link;
        enum pch_pmc_xtal xtal = pmc_get_xtal_freq();
        size_t i;
 
        /* Select link config based on XTAL frequency and set IP clock. */
        switch (xtal) {
        case XTAL_24_MHZ:
                link = &link_xtal_24;
                intel_controller.ip_clock = 24 * MHz;
                break;
        case XTAL_38_4_MHZ:
                link = &link_xtal_38_4;
                intel_controller.ip_clock = 38400 * KHz;
                break;
        case XTAL_19_2_MHZ:
        default:
                printk(BIOS_ERR, "%s: XTAL not supported: 0x%x\n", __func__, xtal);
                return -1;
        }
 
        /* Fill link config in controller map based on selected XTAL. */
        for (i = 0; i < intel_controller.sdw.master_list_count; i++)
                memcpy(&intel_controller.sdw.master_list[i], link, sizeof(*link));
 
        *controller = &intel_controller;
        return 0;
}