wacom.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <types.h>
#include <console/console.h>
#include <acpi/acpigen.h>
#include <device/device.h>
#include <device/pnp.h>
#include <string.h>
#include "lenovo.h"
#include "drivers/i2c/at24rf08c/lenovo.h"
 
static const char tablet_numbers[][5] = {
        /* X60t. */
        "6363", "6364", "6365", "6366",
        "6367", "6368", "7762", "7763",
        "7764", "7767", "7768", "7769",
        /* X200t. */
        "7448", "7449", "7450", "7453",
        /* X201t. */
        "0053", "0831", "2985", "3093",
        "3113", "3144", "3239", "4184",
        "2263", "2266",
};
 
int
drivers_lenovo_is_wacom_present(void)
{
        const char *pn;
        int i;
        static int result = -1;
        struct device *superio;
        u8 sioid;
 
        if (result != -1)
                return result;
 
        if (CONFIG(DIGITIZER_PRESENT)) {
                printk (BIOS_INFO, "Digitizer state forced as present\n");
                return (result = 1);
        }
 
        if (CONFIG(DIGITIZER_ABSENT)) {
                printk (BIOS_INFO, "Digitizer state forced as absent\n");
                return (result = 0);
        }
 
        superio = dev_find_slot_pnp (0x164e, 3);
        if (!superio) {
                printk (BIOS_INFO, "No Super I/O, skipping wacom\n");
                return (result = 0);
        }
 
        /* Probe ID. */
        sioid = pnp_read_config(superio, 0x20);
        if (sioid == 0xff) {
                printk (BIOS_INFO, "Super I/O probe failed, skipping wacom\n");
                return (result = 0);
        }
 
        pn = lenovo_mainboard_partnumber();
        if (!pn)
                return (result = 0);
        printk (BIOS_DEBUG, "Lenovo P/N is %s\n", pn);
        for (i = 0; i < ARRAY_SIZE (tablet_numbers); i++)
                if (memcmp (tablet_numbers[i], pn, 4) == 0) {
                        printk (BIOS_DEBUG, "Lenovo P/N %s is a tablet\n", pn);
                        return (result = 1);
                }
        printk (BIOS_DEBUG, "Lenovo P/N %s is not a tablet\n", pn);
        return (result = 0);
}
 
void
drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
                                          int have_dock_serial)
{
        acpigen_write_scope(scope);
 
        if (drivers_lenovo_is_wacom_present()) {
                acpigen_write_device("DTR");
 
                acpigen_write_name("_HID");
                acpigen_emit_eisaid("WACF004");
 
                acpigen_write_name("_CRS");
 
                acpigen_write_resourcetemplate_header();
                acpigen_write_io16(0x200, 0x200, 1, 8, 1);
                acpigen_write_irq((1 << 5));
 
                acpigen_write_resourcetemplate_footer();
 
                acpigen_write_STA(0xf);
 
                acpigen_pop_len();
        }
 
        if (have_dock_serial) {
                acpigen_write_device("COMA");
 
                acpigen_write_name("_HID");
                acpigen_emit_eisaid("PNP0501");
                acpigen_write_name("_UID");
                /* Byte */
                acpigen_write_byte(0x2);
 
                acpigen_write_name("_CRS");
 
                acpigen_write_resourcetemplate_header();
                acpigen_write_io16(0x3f8, 0x3f8, 1, 8, 1);
                acpigen_write_irq(1 << 4);
 
                acpigen_write_resourcetemplate_footer();
 
                acpigen_write_STA(0xf);
 
                acpigen_pop_len();
        }
 
        acpigen_pop_len();
}