/* * chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices. * * Author : Benson Leung * * Copyright (C) 2012 Google, Inc. * * 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; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #define ATMEL_TP_I2C_ADDR 0x4b #define ATMEL_TP_I2C_BL_ADDR 0x25 #define ATMEL_TS_I2C_ADDR 0x4a #define ATMEL_TS_I2C_BL_ADDR 0x26 #define CYAPA_TP_I2C_ADDR 0x67 #define ISL_ALS_I2C_ADDR 0x44 #define TAOS_ALS_I2C_ADDR 0x29 static struct i2c_client *als; static struct i2c_client *tp; static struct i2c_client *ts; const char *i2c_adapter_names[] = { "SMBus I801 adapter", "i915 gmbus vga", "i915 gmbus panel", }; /* Keep this enum consistent with i2c_adapter_names */ enum i2c_adapter_type { I2C_ADAPTER_SMBUS = 0, I2C_ADAPTER_VGADDC, I2C_ADAPTER_PANEL, }; static struct i2c_board_info __initdata cyapa_device = { I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), .flags = I2C_CLIENT_WAKE, }; static struct i2c_board_info __initdata isl_als_device = { I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), }; static struct i2c_board_info __initdata tsl2583_als_device = { I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR), }; static struct i2c_board_info __initdata tsl2563_als_device = { I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR), }; static struct mxt_platform_data atmel_224s_tp_platform_data = { .x_line = 18, .y_line = 12, .x_size = 102*20, .y_size = 68*20, .blen = 0x80, /* Gain setting is in upper 4 bits */ .threshold = 0x32, .voltage = 0, /* 3.3V */ .orient = MXT_VERTICAL_FLIP, .irqflags = IRQF_TRIGGER_FALLING, .is_tp = true, .key_map = { KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, BTN_LEFT }, .config = NULL, .config_length = 0, }; static struct i2c_board_info __initdata atmel_224s_tp_device = { I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR), .platform_data = &atmel_224s_tp_platform_data, .flags = I2C_CLIENT_WAKE, }; static struct mxt_platform_data atmel_1664s_platform_data = { .x_line = 32, .y_line = 50, .x_size = 1700, .y_size = 2560, .blen = 0x89, /* Gain setting is in upper 4 bits */ .threshold = 0x28, .voltage = 0, /* 3.3V */ .orient = MXT_ROTATED_90_COUNTER, .irqflags = IRQF_TRIGGER_FALLING, .is_tp = false, .config = NULL, .config_length = 0, }; static struct i2c_board_info __initdata atmel_1664s_device = { I2C_BOARD_INFO("atmel_mxt_ts", ATMEL_TS_I2C_ADDR), .platform_data = &atmel_1664s_platform_data, .flags = I2C_CLIENT_WAKE, }; static struct i2c_client __init *__add_probed_i2c_device( const char *name, int bus, struct i2c_board_info *info, const unsigned short *addrs) { const struct dmi_device *dmi_dev; const struct dmi_dev_onboard *dev_data; struct i2c_adapter *adapter; struct i2c_client *client; if (bus < 0) return NULL; /* * If a name is specified, look for irq platform information stashed * in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware. */ if (name) { dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL); if (!dmi_dev) { pr_err("%s failed to dmi find device %s.\n", __func__, name); return NULL; } dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data; if (!dev_data) { pr_err("%s failed to get data from dmi for %s.\n", __func__, name); return NULL; } info->irq = dev_data->instance; } adapter = i2c_get_adapter(bus); if (!adapter) { pr_err("%s failed to get i2c adapter %d.\n", __func__, bus); return NULL; } /* add the i2c device */ client = i2c_new_probed_device(adapter, info, addrs, NULL); if (!client) pr_err("%s failed to register device %d-%02x\n", __func__, bus, info->addr); else pr_debug("%s added i2c device %d-%02x\n", __func__, bus, info->addr); i2c_put_adapter(adapter); return client; } static int __init __find_i2c_adap(struct device *dev, void *data) { const char *name = data; static const char *prefix = "i2c-"; struct i2c_adapter *adapter; if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0) return 0; adapter = to_i2c_adapter(dev); return (strncmp(adapter->name, name, strlen(name)) == 0); } static int __init find_i2c_adapter_num(enum i2c_adapter_type type) { struct device *dev = NULL; struct i2c_adapter *adapter; const char *name = i2c_adapter_names[type]; /* find the adapter by name */ dev = bus_find_device(&i2c_bus_type, NULL, (void *)name, __find_i2c_adap); if (!dev) { pr_err("%s: i2c adapter %s not found on system.\n", __func__, name); return -ENODEV; } adapter = to_i2c_adapter(dev); return adapter->nr; } /* * Takes a list of addresses in addrs as such : * { addr1, ... , addrn, I2C_CLIENT_END }; * add_probed_i2c_device will use i2c_new_probed_device * and probe for devices at all of the addresses listed. * Returns NULL if no devices found. * See Documentation/i2c/instantiating-devices for more information. */ static __init struct i2c_client *add_probed_i2c_device( const char *name, enum i2c_adapter_type type, struct i2c_board_info *info, const unsigned short *addrs) { return __add_probed_i2c_device(name, find_i2c_adapter_num(type), info, addrs); } /* * Probes for a device at a single address, the one provided by * info->addr. * Returns NULL if no device found. */ static __init struct i2c_client *add_i2c_device(const char *name, enum i2c_adapter_type type, struct i2c_board_info *info) { const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END }; return __add_probed_i2c_device(name, find_i2c_adapter_num(type), info, addr_list); } static struct i2c_client __init *add_smbus_device(const char *name, struct i2c_board_info *info) { return add_i2c_device(name, I2C_ADAPTER_SMBUS, info); } static int __init setup_cyapa_smbus_tp(const struct dmi_system_id *id) { /* add cyapa touchpad on smbus */ tp = add_smbus_device("trackpad", &cyapa_device); return 0; } static int __init setup_atmel_224s_tp(const struct dmi_system_id *id) { const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR, ATMEL_TP_I2C_ADDR, I2C_CLIENT_END }; /* add atmel mxt touchpad on VGA DDC GMBus */ tp = add_probed_i2c_device("trackpad", I2C_ADAPTER_VGADDC, &atmel_224s_tp_device, addr_list); return 0; } static int __init setup_atmel_1664s_ts(const struct dmi_system_id *id) { const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR, ATMEL_TS_I2C_ADDR, I2C_CLIENT_END }; /* add atmel mxt touch device on PANEL GMBus */ ts = add_probed_i2c_device("touchscreen", I2C_ADAPTER_PANEL, &atmel_1664s_device, addr_list); return 0; } static int __init setup_isl29018_als(const struct dmi_system_id *id) { /* add isl29018 light sensor */ als = add_smbus_device("lightsensor", &isl_als_device); return 0; } static int __init setup_isl29023_als(const struct dmi_system_id *id) { /* add isl29023 light sensor on Panel GMBus */ als = add_i2c_device("lightsensor", I2C_ADAPTER_PANEL, &isl_als_device); return 0; } static int __init setup_tsl2583_als(const struct dmi_system_id *id) { /* add tsl2583 light sensor on smbus */ als = add_smbus_device(NULL, &tsl2583_als_device); return 0; } static int __init setup_tsl2563_als(const struct dmi_system_id *id) { /* add tsl2563 light sensor on smbus */ als = add_smbus_device(NULL, &tsl2563_als_device); return 0; } static struct dmi_system_id __initdata chromeos_laptop_dmi_table[] = { { .ident = "Samsung Series 5 550 - Touchpad", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"), DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"), }, .callback = setup_cyapa_smbus_tp, }, { .ident = "Chromebook Pixel - Touchscreen", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), DMI_MATCH(DMI_PRODUCT_NAME, "Link"), }, .callback = setup_atmel_1664s_ts, }, { .ident = "Chromebook Pixel - Touchpad", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), DMI_MATCH(DMI_PRODUCT_NAME, "Link"), }, .callback = setup_atmel_224s_tp, }, { .ident = "Samsung Series 5 550 - Light Sensor", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"), DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"), }, .callback = setup_isl29018_als, }, { .ident = "Chromebook Pixel - Light Sensor", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), DMI_MATCH(DMI_PRODUCT_NAME, "Link"), }, .callback = setup_isl29023_als, }, { .ident = "Acer C7 Chromebook - Touchpad", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"), }, .callback = setup_cyapa_smbus_tp, }, { .ident = "HP Pavilion 14 Chromebook - Touchpad", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"), }, .callback = setup_cyapa_smbus_tp, }, { .ident = "Samsung Series 5 - Light Sensor", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "Alex"), }, .callback = setup_tsl2583_als, }, { .ident = "Cr-48 - Light Sensor", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), }, .callback = setup_tsl2563_als, }, { .ident = "Acer AC700 - Light Sensor", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"), }, .callback = setup_tsl2563_als, }, { } }; MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table); static int __init chromeos_laptop_init(void) { if (!dmi_check_system(chromeos_laptop_dmi_table)) { pr_debug("%s unsupported system.\n", __func__); return -ENODEV; } return 0; } static void __exit chromeos_laptop_exit(void) { if (als) i2c_unregister_device(als); if (tp) i2c_unregister_device(tp); if (ts) i2c_unregister_device(ts); } module_init(chromeos_laptop_init); module_exit(chromeos_laptop_exit); MODULE_DESCRIPTION("Chrome OS Laptop driver"); MODULE_AUTHOR("Benson Leung "); MODULE_LICENSE("GPL");