drivers/platform/x86/silead_dmi.c

   1 /*
   2  * Silead touchscreen driver DMI based configuration code
   3  *
   4  * Copyright (c) 2017 Red Hat Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Red Hat authors:
  12  * Hans de Goede <hdegoede@redhat.com>
  13  */
  14
  15 #include <linux/acpi.h>
  16 #include <linux/device.h>
  17 #include <linux/dmi.h>
  18 #include <linux/i2c.h>
  19 #include <linux/notifier.h>
  20 #include <linux/property.h>
  21 #include <linux/string.h>
  22
  23 struct silead_ts_dmi_data {
  24         const char *acpi_name;
  25         const struct property_entry *properties;
  26 };
  27
  28 static const struct property_entry cube_iwork8_air_props[] = {
  29         PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
  30         PROPERTY_ENTRY_U32("touchscreen-size-y", 900),
  31         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  32         PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-cube-iwork8-air.fw"),
  33         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  34         { }
  35 };
  36
  37 static const struct silead_ts_dmi_data cube_iwork8_air_data = {
  38         .acpi_name      = "MSSL1680:00",
  39         .properties     = cube_iwork8_air_props,
  40 };
  41
  42 static const struct property_entry jumper_ezpad_mini3_props[] = {
  43         PROPERTY_ENTRY_U32("touchscreen-size-x", 1700),
  44         PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
  45         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  46         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-jumper-ezpad-mini3.fw"),
  47         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  48         { }
  49 };
  50
  51 static const struct silead_ts_dmi_data jumper_ezpad_mini3_data = {
  52         .acpi_name      = "MSSL1680:00",
  53         .properties     = jumper_ezpad_mini3_props,
  54 };
  55
  56 static const struct property_entry dexp_ursus_7w_props[] = {
  57         PROPERTY_ENTRY_U32("touchscreen-size-x", 890),
  58         PROPERTY_ENTRY_U32("touchscreen-size-y", 630),
  59         PROPERTY_ENTRY_STRING("firmware-name", "gsl1686-dexp-ursus-7w.fw"),
  60         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  61         { }
  62 };
  63
  64 static const struct silead_ts_dmi_data dexp_ursus_7w_data = {
  65         .acpi_name      = "MSSL1680:00",
  66         .properties     = dexp_ursus_7w_props,
  67 };
  68
  69 static const struct property_entry surftab_wintron70_st70416_6_props[] = {
  70         PROPERTY_ENTRY_U32("touchscreen-size-x", 884),
  71         PROPERTY_ENTRY_U32("touchscreen-size-y", 632),
  72         PROPERTY_ENTRY_STRING("firmware-name",
  73                               "gsl1686-surftab-wintron70-st70416-6.fw"),
  74         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  75         { }
  76 };
  77
  78 static const struct silead_ts_dmi_data surftab_wintron70_st70416_6_data = {
  79         .acpi_name      = "MSSL1680:00",
  80         .properties     = surftab_wintron70_st70416_6_props,
  81 };
  82
  83 static const struct property_entry gp_electronic_t701_props[] = {
  84         PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
  85         PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
  86         PROPERTY_ENTRY_STRING("firmware-name",
  87                               "gsl1680-gp-electronic-t701.fw"),
  88         { }
  89 };
  90
  91 static const struct silead_ts_dmi_data gp_electronic_t701_data = {
  92         .acpi_name      = "MSSL1680:00",
  93         .properties     = gp_electronic_t701_props,
  94 };
  95
  96 static const struct property_entry pipo_w2s_props[] = {
  97         PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
  98         PROPERTY_ENTRY_U32("touchscreen-size-y", 880),
  99         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 100         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 101         PROPERTY_ENTRY_STRING("firmware-name",
 102                               "gsl1680-pipo-w2s.fw"),
 103         { }
 104 };
 105
 106 static const struct silead_ts_dmi_data pipo_w2s_data = {
 107         .acpi_name      = "MSSL1680:00",
 108         .properties     = pipo_w2s_props,
 109 };
 110
 111 static const struct property_entry pov_mobii_wintab_p800w_props[] = {
 112         PROPERTY_ENTRY_U32("touchscreen-size-x", 1800),
 113         PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
 114         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 115         PROPERTY_ENTRY_STRING("firmware-name",
 116                               "gsl3692-pov-mobii-wintab-p800w.fw"),
 117         { }
 118 };
 119
 120 static const struct silead_ts_dmi_data pov_mobii_wintab_p800w_data = {
 121         .acpi_name      = "MSSL1680:00",
 122         .properties     = pov_mobii_wintab_p800w_props,
 123 };
 124
 125 static const struct dmi_system_id silead_ts_dmi_table[] = {
 126         {
 127                 /* CUBE iwork8 Air */
 128                 .driver_data = (void *)&cube_iwork8_air_data,
 129                 .matches = {
 130                         DMI_MATCH(DMI_SYS_VENDOR, "cube"),
 131                         DMI_MATCH(DMI_PRODUCT_NAME, "i1-TF"),
 132                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 133                 },
 134         },
 135         {
 136                 /* Jumper EZpad mini3 */
 137                 .driver_data = (void *)&jumper_ezpad_mini3_data,
 138                 .matches = {
 139                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 140                         /* jumperx.T87.KFBNEEA02 with the version-nr dropped */
 141                         DMI_MATCH(DMI_BIOS_VERSION, "jumperx.T87.KFBNEEA"),
 142                 },
 143         },
 144         {
 145                 /* DEXP Ursus 7W */
 146                 .driver_data = (void *)&dexp_ursus_7w_data,
 147                 .matches = {
 148                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 149                         DMI_MATCH(DMI_PRODUCT_NAME, "7W"),
 150                 },
 151         },
 152         {
 153                 /* Trekstor Surftab Wintron 7.0 ST70416-6 */
 154                 .driver_data = (void *)&surftab_wintron70_st70416_6_data,
 155                 .matches = {
 156                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 157                         DMI_MATCH(DMI_PRODUCT_NAME, "ST70416-6"),
 158                         /* Exact match, different versions need different fw */
 159                         DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA04"),
 160                 },
 161         },
 162         {
 163                 /* GP-electronic T701 */
 164                 .driver_data = (void *)&gp_electronic_t701_data,
 165                 .matches = {
 166                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 167                         DMI_MATCH(DMI_PRODUCT_NAME, "T701"),
 168                         DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),
 169                 },
 170         },
 171         {
 172                 /* Pipo W2S */
 173                 .driver_data = (void *)&pipo_w2s_data,
 174                 .matches = {
 175                         DMI_MATCH(DMI_SYS_VENDOR, "PIPO"),
 176                         DMI_MATCH(DMI_PRODUCT_NAME, "W2S"),
 177                 },
 178         },
 179         {
 180                 /* Point of View mobii wintab p800w */
 181                 .driver_data = (void *)&pov_mobii_wintab_p800w_data,
 182                 .matches = {
 183                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 184                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
 185                         DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
 186                         /* Above matches are too generic, add bios-date match */
 187                         DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
 188                 },
 189         },
 190         { },
 191 };
 192
 193 static const struct silead_ts_dmi_data *silead_ts_data;
 194
 195 static void silead_ts_dmi_add_props(struct i2c_client *client)
 196 {
 197         struct device *dev = &client->dev;
 198         int error;
 199
 200         if (has_acpi_companion(dev) &&
 201             !strncmp(silead_ts_data->acpi_name, client->name, I2C_NAME_SIZE)) {
 202                 error = device_add_properties(dev, silead_ts_data->properties);
 203                 if (error)
 204                         dev_err(dev, "failed to add properties: %d\n", error);
 205         }
 206 }
 207
 208 static int silead_ts_dmi_notifier_call(struct notifier_block *nb,
 209                                        unsigned long action, void *data)
 210 {
 211         struct device *dev = data;
 212         struct i2c_client *client;
 213
 214         switch (action) {
 215         case BUS_NOTIFY_ADD_DEVICE:
 216                 client = i2c_verify_client(dev);
 217                 if (client)
 218                         silead_ts_dmi_add_props(client);
 219                 break;
 220
 221         default:
 222                 break;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static struct notifier_block silead_ts_dmi_notifier = {
 229         .notifier_call = silead_ts_dmi_notifier_call,
 230 };
 231
 232 static int __init silead_ts_dmi_init(void)
 233 {
 234         const struct dmi_system_id *dmi_id;
 235         int error;
 236
 237         dmi_id = dmi_first_match(silead_ts_dmi_table);
 238         if (!dmi_id)
 239                 return 0; /* Not an error */
 240
 241         silead_ts_data = dmi_id->driver_data;
 242
 243         error = bus_register_notifier(&i2c_bus_type, &silead_ts_dmi_notifier);
 244         if (error)
 245                 pr_err("%s: failed to register i2c bus notifier: %d\n",
 246                         __func__, error);
 247
 248         return error;
 249 }
 250
 251 /*
 252  * We are registering out notifier after i2c core is initialized and i2c bus
 253  * itself is ready (which happens at postcore initcall level), but before
 254  * ACPI starts enumerating devices (at subsys initcall level).
 255  */
 256 arch_initcall(silead_ts_dmi_init);