src/drivers/lenovo/wacom.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <types.h>
   4 #include <console/console.h>
   5 #include <acpi/acpigen.h>
   6 #include <device/device.h>
   7 #include <device/pnp.h>
   8 #include <string.h>
   9 #include "lenovo.h"
  10 #include "drivers/i2c/at24rf08c/lenovo.h"
  11
  12 static const char tablet_numbers[][5] = {
  13         /* X60t. */
  14         "6363", "6364", "6365", "6366",
  15         "6367", "6368", "7762", "7763",
  16         "7764", "7767", "7768", "7769",
  17         /* X200t. */
  18         "7448", "7449", "7450", "7453",
  19         /* X201t. */
  20         "0053", "0831", "2985", "3093",
  21         "3113", "3144", "3239", "4184",
  22         "2263", "2266",
  23 };
  24
  25 int
  26 drivers_lenovo_is_wacom_present(void)
  27 {
  28         const char *pn;
  29         int i;
  30         static int result = -1;
  31         struct device *superio;
  32         u8 sioid;
  33
  34         if (result != -1)
  35                 return result;
  36
  37         if (CONFIG(DIGITIZER_PRESENT)) {
  38                 printk(BIOS_INFO, "Digitizer state forced as present\n");
  39                 return (result = 1);
  40         }
  41
  42         if (CONFIG(DIGITIZER_ABSENT)) {
  43                 printk(BIOS_INFO, "Digitizer state forced as absent\n");
  44                 return (result = 0);
  45         }
  46
  47         superio = dev_find_slot_pnp(0x164e, 3);
  48         if (!superio) {
  49                 printk(BIOS_INFO, "No Super I/O, skipping wacom\n");
  50                 return (result = 0);
  51         }
  52
  53         /* Probe ID. */
  54         sioid = pnp_read_config(superio, 0x20);
  55         if (sioid == 0xff) {
  56                 printk(BIOS_INFO, "Super I/O probe failed, skipping wacom\n");
  57                 return (result = 0);
  58         }
  59
  60         pn = lenovo_mainboard_partnumber();
  61         if (!pn)
  62                 return (result = 0);
  63         printk(BIOS_DEBUG, "Lenovo P/N is %s\n", pn);
  64         for (i = 0; i < ARRAY_SIZE(tablet_numbers); i++)
  65                 if (memcmp(tablet_numbers[i], pn, 4) == 0) {
  66                         printk(BIOS_DEBUG, "Lenovo P/N %s is a tablet\n", pn);
  67                         return (result = 1);
  68                 }
  69         printk(BIOS_DEBUG, "Lenovo P/N %s is not a tablet\n", pn);
  70         return (result = 0);
  71 }
  72
  73 void
  74 drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
  75                                           int have_dock_serial)
  76 {
  77         acpigen_write_scope(scope);
  78
  79         if (drivers_lenovo_is_wacom_present()) {
  80                 acpigen_write_device("DTR");
  81
  82                 acpigen_write_name("_HID");
  83                 acpigen_emit_eisaid("WACF004");
  84
  85                 acpigen_write_name("_CRS");
  86
  87                 acpigen_write_resourcetemplate_header();
  88                 acpigen_write_io16(0x200, 0x200, 1, 8, 1);
  89                 acpigen_write_irq((1 << 5));
  90
  91                 acpigen_write_resourcetemplate_footer();
  92
  93                 acpigen_write_STA(0xf);
  94
  95                 acpigen_pop_len();
  96         }
  97
  98         if (have_dock_serial) {
  99                 acpigen_write_device("COMA");
 100
 101                 acpigen_write_name("_HID");
 102                 acpigen_emit_eisaid("PNP0501");
 103                 acpigen_write_name("_UID");
 104                 /* Byte */
 105                 acpigen_write_byte(0x2);
 106
 107                 acpigen_write_name("_CRS");
 108
 109                 acpigen_write_resourcetemplate_header();
 110                 acpigen_write_io16(0x3f8, 0x3f8, 1, 8, 1);
 111                 acpigen_write_irq(1 << 4);
 112
 113                 acpigen_write_resourcetemplate_footer();
 114
 115                 acpigen_write_STA(0xf);
 116
 117                 acpigen_pop_len();
 118         }
 119
 120         acpigen_pop_len();
 121 }