Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 1 | /* |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 2 | * |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | |
Furquan Shaikh | 76cedd2 | 2020-05-02 10:24:23 -0700 | [diff] [blame] | 7 | #include <acpi/acpi.h> |
| 8 | #include <acpi/acpi_device.h> |
| 9 | #include <acpi/acpigen.h> |
| 10 | #include <acpi/acpigen_ps2_keybd.h> |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 11 | #include <console/console.h> |
| 12 | #include <drivers/usb/acpi/chip.h> |
| 13 | #include <stdlib.h> |
| 14 | |
| 15 | #include "chip.h" |
| 16 | #include "ec.h" |
| 17 | #include "ec_commands.h" |
| 18 | |
Karthikeyan Ramasubramanian | a95907b | 2020-04-13 18:03:29 -0600 | [diff] [blame] | 19 | #define GOOGLE_CHROMEEC_USBC_DEVICE_HID "GOOG0014" |
| 20 | #define GOOGLE_CHROMEEC_USBC_DEVICE_NAME "USBC" |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 21 | |
Tim Wawrzynczak | 6046739 | 2020-05-18 13:45:43 -0600 | [diff] [blame^] | 22 | /* Avoid adding a false dependency on an SoC or intel/common */ |
| 23 | extern const struct device *soc_get_pmc_mux_device(int port_number); |
| 24 | |
| 25 | __weak const struct device *soc_get_pmc_mux_device(int port_number) |
| 26 | { |
| 27 | return NULL; |
| 28 | } |
| 29 | |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 30 | const char *google_chromeec_acpi_name(const struct device *dev) |
| 31 | { |
Furquan Shaikh | eec30f7 | 2020-04-20 16:38:21 -0700 | [diff] [blame] | 32 | /* |
| 33 | * Chrome EC device (CREC - GOOG0004) is really a child of EC device (EC - PNP0C09) in |
| 34 | * ACPI tables. However, in coreboot device tree, there is no separate chip/device for |
| 35 | * EC0. Thus, Chrome EC device needs to return "EC0.CREC" as the ACPI name so that the |
| 36 | * callers can get the correct acpi device path/scope for this device. |
| 37 | * |
| 38 | * If we ever enable a separate driver for generating AML for EC0 device, then this |
| 39 | * function needs to be updated to return "CREC". |
| 40 | */ |
| 41 | return "EC0.CREC"; |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | static const char *power_role_to_str(enum ec_pd_power_role_caps power_role) |
| 45 | { |
| 46 | switch (power_role) { |
| 47 | case EC_PD_POWER_ROLE_SOURCE: |
| 48 | return "source"; |
| 49 | case EC_PD_POWER_ROLE_SINK: |
| 50 | return "sink"; |
| 51 | case EC_PD_POWER_ROLE_DUAL: |
| 52 | return "dual"; |
| 53 | default: |
| 54 | return "unknown"; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | static const char *try_power_role_to_str(enum ec_pd_try_power_role_caps try_power_role) |
| 59 | { |
| 60 | switch (try_power_role) { |
| 61 | case EC_PD_TRY_POWER_ROLE_NONE: |
| 62 | /* |
| 63 | * This should never get returned; if there is no try-power role for a device, |
| 64 | * then the try-power-role field is not added to the DSD. Thus, this is just |
| 65 | * for completeness. |
| 66 | */ |
| 67 | return "none"; |
| 68 | case EC_PD_TRY_POWER_ROLE_SINK: |
| 69 | return "sink"; |
| 70 | case EC_PD_TRY_POWER_ROLE_SOURCE: |
| 71 | return "source"; |
| 72 | default: |
| 73 | return "unknown"; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | static const char *data_role_to_str(enum ec_pd_data_role_caps data_role) |
| 78 | { |
| 79 | switch (data_role) { |
| 80 | case EC_PD_DATA_ROLE_DFP: |
| 81 | return "host"; |
| 82 | case EC_PD_DATA_ROLE_UFP: |
| 83 | return "device"; |
| 84 | case EC_PD_DATA_ROLE_DUAL: |
| 85 | return "dual"; |
| 86 | default: |
| 87 | return "unknown"; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Apparently these are supposed to be uppercase, in contrast to the other |
| 93 | * lowercase fields. |
| 94 | */ |
| 95 | static const char *port_location_to_str(enum ec_pd_port_location port_location) |
| 96 | { |
| 97 | switch (port_location) { |
| 98 | case EC_PD_PORT_LOCATION_LEFT: |
| 99 | return "LEFT"; |
| 100 | case EC_PD_PORT_LOCATION_RIGHT: |
| 101 | return "RIGHT"; |
| 102 | case EC_PD_PORT_LOCATION_BACK: |
| 103 | return "BACK"; |
| 104 | case EC_PD_PORT_LOCATION_FRONT: |
| 105 | return "FRONT"; |
| 106 | case EC_PD_PORT_LOCATION_LEFT_FRONT: |
| 107 | return "LEFT_FRONT"; |
| 108 | case EC_PD_PORT_LOCATION_LEFT_BACK: |
| 109 | return "LEFT_BACK"; |
| 110 | case EC_PD_PORT_LOCATION_RIGHT_FRONT: |
| 111 | return "RIGHT_FRONT"; |
| 112 | case EC_PD_PORT_LOCATION_RIGHT_BACK: |
| 113 | return "RIGHT_BACK"; |
| 114 | case EC_PD_PORT_LOCATION_BACK_LEFT: |
| 115 | return "BACK_LEFT"; |
| 116 | case EC_PD_PORT_LOCATION_BACK_RIGHT: |
| 117 | return "BACK_RIGHT"; |
| 118 | case EC_PD_PORT_LOCATION_UNKNOWN: /* intentional fallthrough */ |
| 119 | default: |
| 120 | return "UNKNOWN"; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /* Add port capabilities as DP properties */ |
| 125 | static void add_port_caps(struct acpi_dp *dsd, const struct usb_pd_port_caps *port_caps) |
| 126 | { |
| 127 | acpi_dp_add_string(dsd, "power-role", power_role_to_str(port_caps->power_role_cap)); |
| 128 | |
| 129 | if (port_caps->try_power_role_cap != EC_PD_TRY_POWER_ROLE_NONE) |
| 130 | acpi_dp_add_string(dsd, "try-power-role", |
| 131 | try_power_role_to_str(port_caps->try_power_role_cap)); |
| 132 | |
| 133 | acpi_dp_add_string(dsd, "data-role", data_role_to_str(port_caps->data_role_cap)); |
| 134 | acpi_dp_add_string(dsd, "port-location", port_location_to_str( |
| 135 | port_caps->port_location)); |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Helper for fill_ssdt_generator. This adds references to the USB |
| 140 | * port objects so that the consumer of this information can know |
| 141 | * whether the port supports USB2 and/or USB3. |
| 142 | */ |
| 143 | static void add_usb_port_references(struct acpi_dp *dsd, int port_number) |
| 144 | { |
| 145 | static const char usb2_port[] = "usb2-port"; |
| 146 | static const char usb3_port[] = "usb3-port"; |
| 147 | struct device *port = NULL; |
| 148 | const char *path; |
| 149 | const char *usb_port_type; |
| 150 | struct drivers_usb_acpi_config *config; |
| 151 | |
| 152 | /* |
| 153 | * Unfortunately, the acpi_dp_* API doesn't write out the data immediately, thus we need |
| 154 | * different storage areas for all of the strings, so strdup() is used for that. It is |
| 155 | * safe to use strdup() here, because the strings are generated at build-time and are |
| 156 | * guaranteed to be NUL-terminated (they come from the devicetree). |
| 157 | */ |
| 158 | while ((port = dev_find_path(port, DEVICE_PATH_USB)) != NULL) { |
| 159 | if (!port->enabled || port->path.type != DEVICE_PATH_USB) |
| 160 | continue; |
| 161 | |
| 162 | /* Looking for USB 2 & 3 port devices only */ |
| 163 | if (port->path.usb.port_type == 2) |
| 164 | usb_port_type = usb2_port; |
| 165 | else if (port->path.usb.port_type == 3) |
| 166 | usb_port_type = usb3_port; |
| 167 | else |
| 168 | continue; |
| 169 | |
| 170 | config = port->chip_info; |
| 171 | |
| 172 | /* |
| 173 | * Look at only USB Type-C ports, making sure they match the |
| 174 | * port number we're looking for (the 'token' field in 'group'). |
| 175 | * Also note that 'port_number' is 0-based, whereas the 'token' |
| 176 | * field is 1-based. |
| 177 | */ |
| 178 | if ((config->type != UPC_TYPE_C_USB2_ONLY) && |
| 179 | (config->type != UPC_TYPE_C_USB2_SS_SWITCH) && |
| 180 | (config->type != UPC_TYPE_C_USB2_SS)) |
| 181 | continue; |
| 182 | |
| 183 | if (config->group.token != (port_number + 1)) |
| 184 | continue; |
| 185 | |
| 186 | path = acpi_device_path(port); |
| 187 | if (path) { |
| 188 | path = strdup(path); |
| 189 | if (!path) |
| 190 | continue; |
| 191 | |
| 192 | acpi_dp_add_reference(dsd, usb_port_type, path); |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | |
Tim Wawrzynczak | 6046739 | 2020-05-18 13:45:43 -0600 | [diff] [blame^] | 197 | /* |
| 198 | * Another helper for fill_ssdt_typec_device(). For each port, this one adds references to the |
| 199 | * ACPI device which control the orientation, USB data role and data muxing. |
| 200 | */ |
| 201 | static void add_switch_references(struct acpi_dp *dsd, int port_number) |
| 202 | { |
| 203 | const struct device *dev; |
| 204 | const char *path; |
| 205 | |
| 206 | dev = soc_get_pmc_mux_device(port_number); |
| 207 | if (!dev) { |
| 208 | printk(BIOS_ERR, "ERROR: %s: No SOC PMC MUX device found", __func__); |
| 209 | return; |
| 210 | } |
| 211 | |
| 212 | path = acpi_device_path(dev); |
| 213 | if (!path) |
| 214 | return; |
| 215 | |
| 216 | acpi_dp_add_reference(dsd, "orientation-switch", path); |
| 217 | acpi_dp_add_reference(dsd, "usb-role-switch", path); |
| 218 | acpi_dp_add_reference(dsd, "mode-switch", path); |
| 219 | } |
| 220 | |
Furquan Shaikh | 7536a39 | 2020-04-24 21:59:21 -0700 | [diff] [blame] | 221 | static void fill_ssdt_typec_device(const struct device *dev) |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 222 | { |
| 223 | struct usb_pd_port_caps port_caps; |
| 224 | char con_name[] = "CONx"; |
| 225 | struct acpi_dp *dsd; |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 226 | int rv; |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 227 | int i, num_ports; |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 228 | |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 229 | if (google_chromeec_get_num_pd_ports(&num_ports)) |
| 230 | return; |
| 231 | |
Furquan Shaikh | eec30f7 | 2020-04-20 16:38:21 -0700 | [diff] [blame] | 232 | acpigen_write_scope(acpi_device_path(dev)); |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 233 | acpigen_write_device(GOOGLE_CHROMEEC_USBC_DEVICE_NAME); |
| 234 | acpigen_write_name_string("_HID", GOOGLE_CHROMEEC_USBC_DEVICE_HID); |
| 235 | acpigen_write_name_string("_DDN", "ChromeOS EC Embedded Controller " |
| 236 | "USB Type-C Control"); |
| 237 | |
| 238 | for (i = 0; i < num_ports; ++i) { |
| 239 | rv = google_chromeec_get_pd_port_caps(i, &port_caps); |
| 240 | if (rv) |
| 241 | continue; |
| 242 | |
| 243 | con_name[3] = (char)i + '0'; |
| 244 | acpigen_write_device(con_name); |
| 245 | acpigen_write_name_integer("_ADR", i); |
| 246 | |
| 247 | /* _DSD, Device-Specific Data */ |
| 248 | dsd = acpi_dp_new_table("_DSD"); |
| 249 | |
| 250 | acpi_dp_add_integer(dsd, "port-number", i); |
| 251 | add_port_caps(dsd, &port_caps); |
| 252 | add_usb_port_references(dsd, i); |
Tim Wawrzynczak | 6046739 | 2020-05-18 13:45:43 -0600 | [diff] [blame^] | 253 | add_switch_references(dsd, i); |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 254 | |
| 255 | acpi_dp_write(dsd); |
| 256 | acpigen_pop_len(); /* Device CONx */ |
| 257 | } |
| 258 | |
| 259 | acpigen_pop_len(); /* Device GOOGLE_CHROMEEC_USBC_DEVICE_NAME */ |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 260 | acpigen_pop_len(); /* Scope */ |
| 261 | } |
| 262 | |
| 263 | static const enum ps2_action_key ps2_enum_val[] = { |
| 264 | [TK_ABSENT] = PS2_KEY_ABSENT, |
| 265 | [TK_BACK] = PS2_KEY_BACK, |
| 266 | [TK_FORWARD] = PS2_KEY_FORWARD, |
| 267 | [TK_REFRESH] = PS2_KEY_REFRESH, |
| 268 | [TK_FULLSCREEN] = PS2_KEY_FULLSCREEN, |
| 269 | [TK_OVERVIEW] = PS2_KEY_OVERVIEW, |
| 270 | [TK_BRIGHTNESS_DOWN] = PS2_KEY_BRIGHTNESS_DOWN, |
| 271 | [TK_BRIGHTNESS_UP] = PS2_KEY_BRIGHTNESS_UP, |
| 272 | [TK_VOL_MUTE] = PS2_KEY_VOL_MUTE, |
| 273 | [TK_VOL_DOWN] = PS2_KEY_VOL_DOWN, |
| 274 | [TK_VOL_UP] = PS2_KEY_VOL_UP, |
| 275 | [TK_SNAPSHOT] = PS2_KEY_SNAPSHOT, |
| 276 | [TK_PRIVACY_SCRN_TOGGLE] = PS2_KEY_PRIVACY_SCRN_TOGGLE, |
| 277 | [TK_KBD_BKLIGHT_DOWN] = PS2_KEY_KBD_BKLIGHT_DOWN, |
| 278 | [TK_KBD_BKLIGHT_UP] = PS2_KEY_KBD_BKLIGHT_UP, |
| 279 | [TK_PLAY_PAUSE] = PS2_KEY_PLAY_PAUSE, |
| 280 | [TK_NEXT_TRACK] = PS2_KEY_NEXT_TRACK, |
| 281 | [TK_PREV_TRACK] = PS2_KEY_PREV_TRACK, |
| 282 | }; |
| 283 | |
Furquan Shaikh | 7536a39 | 2020-04-24 21:59:21 -0700 | [diff] [blame] | 284 | static void fill_ssdt_ps2_keyboard(const struct device *dev) |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 285 | { |
| 286 | uint8_t i; |
| 287 | struct ec_response_keybd_config keybd = {}; |
| 288 | enum ps2_action_key ps2_action_keys[MAX_TOP_ROW_KEYS] = {}; |
| 289 | |
| 290 | if (google_chromeec_get_keybd_config(&keybd) || |
| 291 | !keybd.num_top_row_keys || |
| 292 | keybd.num_top_row_keys > MAX_TOP_ROW_KEYS) { |
| 293 | printk(BIOS_ERR, "PS2K: Bad resp from EC. Vivaldi disabled!\n"); |
| 294 | return; |
| 295 | } |
| 296 | |
| 297 | /* Convert enum action_key values to enum ps2_action_key values */ |
| 298 | for (i = 0; i < keybd.num_top_row_keys; i++) |
| 299 | ps2_action_keys[i] = ps2_enum_val[keybd.action_keys[i]]; |
| 300 | |
| 301 | acpigen_ps2_keyboard_dsd("_SB.PCI0.PS2K", keybd.num_top_row_keys, |
| 302 | ps2_action_keys, |
| 303 | !!(keybd.capabilities & KEYBD_CAP_FUNCTION_KEYS), |
| 304 | !!(keybd.capabilities & KEYBD_CAP_NUMERIC_KEYPAD), |
| 305 | !!(keybd.capabilities & KEYBD_CAP_SCRNLOCK_KEY)); |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Furquan Shaikh | 7536a39 | 2020-04-24 21:59:21 -0700 | [diff] [blame] | 308 | void google_chromeec_fill_ssdt_generator(const struct device *dev) |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 309 | { |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 310 | if (!dev->enabled) |
Matt DeVillier | 70ea3b9 | 2020-03-18 23:45:32 -0500 | [diff] [blame] | 311 | return; |
| 312 | |
Rajat Jain | 962c788 | 2020-04-01 17:24:28 -0700 | [diff] [blame] | 313 | fill_ssdt_typec_device(dev); |
| 314 | fill_ssdt_ps2_keyboard(dev); |
Tim Wawrzynczak | eb3cd85 | 2020-01-22 16:52:13 -0700 | [diff] [blame] | 315 | } |