src/drivers/lenovo/wacom.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 Vladimir Serbinenko
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; version 2, or (at your
   9  * option) any later version, of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <types.h>
  18 #include <console/console.h>
  19 #include <arch/acpi.h>
  20 #include <arch/acpigen.h>
  21 #include <device/device.h>
  22 #include <device/pnp.h>
  23 #include <string.h>
  24 #include "lenovo.h"
  25 #include "drivers/i2c/at24rf08c/lenovo.h"
  26
  27 static const char tablet_numbers[][5] = {
  28         /* X60t. */
  29         "6363", "6364", "6365", "6366",
  30         "6367", "6368", "7762", "7763",
  31         "7764", "7767", "7768", "7769",
  32         /* X200t. */
  33         "7448", "7449", "7450", "7453",
  34         /* X201t. */
  35         "0053", "0831", "2985", "3093",
  36         "3113", "3144", "3239", "4184",
  37         "2263", "2266",
  38 };
  39
  40 int
  41 drivers_lenovo_is_wacom_present(void)
  42 {
  43         const char *pn;
  44         int i;
  45         static int result = -1;
  46         device_t superio;
  47         u8 sioid;
  48
  49         if (result != -1)
  50                 return result;
  51
  52         if (IS_ENABLED(CONFIG_DIGITIZER_PRESENT)) {
  53                 printk (BIOS_INFO, "Digitizer state forced as present\n");
  54                 return (result = 1);
  55         }
  56
  57         if (IS_ENABLED(CONFIG_DIGITIZER_ABSENT)) {
  58                 printk (BIOS_INFO, "Digitizer state forced as absent\n");
  59                 return (result = 0);
  60         }
  61
  62         superio = dev_find_slot_pnp (0x164e, 3);
  63         if (!superio) {
  64                 printk (BIOS_INFO, "No Super I/O, skipping wacom\n");
  65                 return (result = 0);
  66         }
  67
  68         /* Probe ID. */
  69         sioid = pnp_read_config(superio, 0x20);
  70         if (sioid == 0xff) {
  71                 printk (BIOS_INFO, "Super I/O probe failed, skipping wacom\n");
  72                 return (result = 0);
  73         }
  74
  75         pn = lenovo_mainboard_partnumber();
  76         if (!pn)
  77                 return (result = 0);
  78         printk (BIOS_DEBUG, "Lenovo P/N is %s\n", pn);
  79         for (i = 0; i < ARRAY_SIZE (tablet_numbers); i++)
  80                 if (memcmp (tablet_numbers[i], pn, 4) == 0) {
  81                         printk (BIOS_DEBUG, "Lenovo P/N %s is a tablet\n", pn);
  82                         return (result = 1);
  83                 }
  84         printk (BIOS_DEBUG, "Lenovo P/N %s is not a tablet\n", pn);
  85         return (result = 0);
  86 }
  87
  88 void
  89 drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
  90                                           int have_dock_serial)
  91 {
  92         acpigen_write_scope(scope);
  93
  94         if (drivers_lenovo_is_wacom_present()) {
  95                 acpigen_write_device("DTR");
  96
  97                 acpigen_write_name("_HID");
  98                 acpigen_emit_eisaid("WACF004");
  99
 100                 acpigen_write_name("_CRS");
 101
 102                 acpigen_write_resourcetemplate_header();
 103                 acpigen_write_io16(0x200, 0x200, 1, 8, 1);
 104                 acpigen_write_irq((1 << 5));
 105
 106                 acpigen_write_resourcetemplate_footer();
 107
 108                 acpigen_write_method("_STA", 0);
 109                 /* return */
 110                 acpigen_emit_byte(0xa4);
 111                 acpigen_write_byte(0xf);
 112                 acpigen_pop_len();
 113
 114                 acpigen_pop_len();
 115         }
 116
 117         if (have_dock_serial) {
 118                 acpigen_write_device("COMA");
 119
 120                 acpigen_write_name("_HID");
 121                 acpigen_emit_eisaid("PNP0501");
 122                 acpigen_write_name("_UID");
 123                 /* Byte */
 124                 acpigen_write_byte(0x2);
 125
 126                 acpigen_write_name("_CRS");
 127
 128                 acpigen_write_resourcetemplate_header();
 129                 acpigen_write_io16(0x3f8, 0x3f8, 1, 8, 1);
 130                 acpigen_write_irq(1 << 4);
 131
 132                 acpigen_write_resourcetemplate_footer();
 133
 134                 /* method op */
 135                 acpigen_write_method("_STA", 0);
 136                 /* return */
 137                 acpigen_emit_byte(0xa4);
 138                 acpigen_write_byte(0xf);
 139                 acpigen_pop_len();
 140
 141                 acpigen_pop_len();
 142         }
 143
 144         acpigen_pop_len();
 145 }