diff options
| -rw-r--r-- | src/mainboard/google/sarien/Kconfig | 5 | ||||
| -rw-r--r-- | src/mainboard/google/sarien/variants/sarien/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/mainboard/google/sarien/variants/sarien/ramstage.c | 73 |
3 files changed, 79 insertions, 1 deletions
diff --git a/src/mainboard/google/sarien/Kconfig b/src/mainboard/google/sarien/Kconfig index dc8f486104..4aea9f7470 100644 --- a/src/mainboard/google/sarien/Kconfig +++ b/src/mainboard/google/sarien/Kconfig @@ -97,6 +97,11 @@ config DEVICETREE string default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb" +config TOUCHSCREEN_HID + string "Specify the touchscreen HID enabled for the OS" + default "WCOM48E2" if BOARD_GOOGLE_ARCADA + default "NONE" if BOARD_GOOGLE_SARIEN + config VBOOT select HAS_RECOVERY_MRC_CACHE select MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN diff --git a/src/mainboard/google/sarien/variants/sarien/Makefile.inc b/src/mainboard/google/sarien/variants/sarien/Makefile.inc index 2bf028eb1f..fa5b2ea36a 100644 --- a/src/mainboard/google/sarien/variants/sarien/Makefile.inc +++ b/src/mainboard/google/sarien/variants/sarien/Makefile.inc @@ -14,6 +14,6 @@ ## bootblock-y += gpio.c -ramstage-y += gpio.c +ramstage-y += gpio.c ramstage.c romstage-y += gpio.c verstage-y += gpio.c diff --git a/src/mainboard/google/sarien/variants/sarien/ramstage.c b/src/mainboard/google/sarien/variants/sarien/ramstage.c new file mode 100644 index 0000000000..ab79678f9a --- /dev/null +++ b/src/mainboard/google/sarien/variants/sarien/ramstage.c @@ -0,0 +1,73 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Google LLC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <bootstate.h> +#include <console/console.h> +#include <device/device.h> +#include <drivers/i2c/hid/chip.h> +#include <drivers/vpd/vpd.h> +#include <soc/pci_devs.h> +#include <string.h> + +/* + * This board may have different touchscreen devices that are at the + * same I2C slave address but need different drivers or ACPI configuration. + * + * The default touchscreen to be enabled is specified in Kconfig by the + * ACPI HID of the device. If a board is connected to a different + * touchscreen device it can be enabled in Kconfig or by setting the + * VPD key 'touchscreen_hid'. + */ + +#define TOUCHSCREEN_I2C_ADDR 0x10 +#define TOUCHSCREEN_VPD_KEY "touchscreen_hid" + +static void disable_unused_touchscreen(void *unused) +{ + struct device *i2c0 = PCH_DEV_I2C0; + struct bus *i2c_slaves = i2c0->link_list; + struct device *slave = i2c_slaves->children; + char touchscreen_hid[9] = CONFIG_TOUCHSCREEN_HID; + struct drivers_i2c_hid_config *info; + + /* Look for VPD key that indicates which touchscreen is present */ + if (IS_ENABLED(CONFIG_VPD) && + !vpd_gets(TOUCHSCREEN_VPD_KEY, touchscreen_hid, + ARRAY_SIZE(touchscreen_hid), VPD_ANY)) + printk(BIOS_INFO, "%s: VPD key '%s' not found, default to %s\n", + __func__, TOUCHSCREEN_VPD_KEY, touchscreen_hid); + + /* Go through all I2C slave devices on this bus */ + while (slave) { + /* Find all the I2C slaves with the matching address */ + if (slave->path.type == DEVICE_PATH_I2C && + slave->path.i2c.device == TOUCHSCREEN_I2C_ADDR) { + info = slave->chip_info; + /* Disable all devices except the matching HID */ + if (strncmp(info->generic.hid, touchscreen_hid, + ARRAY_SIZE(touchscreen_hid))) { + printk(BIOS_INFO, "%s: Disable %s\n", __func__, + info->generic.hid); + slave->enabled = 0; + } else { + printk(BIOS_INFO, "%s: Enable %s\n", __func__, + info->generic.hid); + } + } + slave = slave->sibling; + } +} +BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY, + disable_unused_touchscreen, NULL); |