sata.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpigen.h>
#include <acpi/acpi_sata.h>
 
/* e.g.
 * generate_sata_ssdt_ports("\_SB.PCI0.SATA", 0x3);
 * generates:
 * Scope (\_SB.PCI0.SATA)
 * {
 *     Device (PR00)
 *     {
 *         Name (_ADR, 0x0000FFFF)  // _ADR: Address
 *     }
 *
 *     Device (PR01)
 *     {
 *         Name (_ADR, 0x0001FFFF)  // _ADR: Address
 *     }
 * }
 *
 */
void generate_sata_ssdt_ports(const char *scope, uint32_t enable_map)
{
        int i;
        uint32_t bit;
        char port_name[4] = "PR00";
 
        acpigen_write_scope(scope);
 
        /* generate a device for every enabled port */
        for (i = 0; i < 32; i++) {
                bit = 1 << i;
                if (!(bit & enable_map))
                        continue;
 
                port_name[2] = '0' + i / 10;
                port_name[3] = '0' + i % 10;
 
                acpigen_write_device(port_name);
 
                acpigen_write_name_dword("_ADR", 0xffff + i * 0x10000);
                acpigen_pop_len(); /* close PRT%d */
        }
 
        acpigen_pop_len(); /* close scope */
}