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