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kernel_optimize_test/drivers/platform/chrome/chromeos_laptop.c
Nick Dyer 61dc1abae6 Input: atmel_mxt_ts - read screen config from chip 
By reading the touchscreen configuration from the settings that the
maXTouch chip is actually using, we can remove some platform data.

The matrix size is not used for anything, and results in some rather
confusing code to re-read it because it may change when configuration
is downloaded, so don't print it out.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-05-26 19:08:21 -07:00

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/*
* chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
*
* Author : Benson Leung <bleung@chromium.org>
*
* 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 <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/i2c/atmel_mxt_ts.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#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;
static 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,
};
struct i2c_peripheral {
int (*add)(enum i2c_adapter_type type);
enum i2c_adapter_type type;
};
#define MAX_I2C_PERIPHERALS 3
struct chromeos_laptop {
struct i2c_peripheral i2c_peripherals[MAX_I2C_PERIPHERALS];
};
static struct chromeos_laptop *cros_laptop;
static struct i2c_board_info cyapa_device = {
I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
.flags = I2C_CLIENT_WAKE,
};
static struct i2c_board_info isl_als_device = {
I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
};
static struct i2c_board_info tsl2583_als_device = {
I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
};
static struct i2c_board_info tsl2563_als_device = {
I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
};
static int mxt_t19_keys[] = {
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
BTN_LEFT
};
static struct mxt_platform_data atmel_224s_tp_platform_data = {
.irqflags = IRQF_TRIGGER_FALLING,
.t19_num_keys = ARRAY_SIZE(mxt_t19_keys),
.t19_keymap = mxt_t19_keys,
.config = NULL,
.config_length = 0,
};
static struct i2c_board_info 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 = {
.irqflags = IRQF_TRIGGER_FALLING,
.config = NULL,
.config_length = 0,
};
static struct i2c_board_info 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 *__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 __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 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) {
/* Adapters may appear later. Deferred probing will retry */
pr_notice("%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 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 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 int setup_cyapa_tp(enum i2c_adapter_type type)
{
if (tp)
return 0;
/* add cyapa touchpad */
tp = add_i2c_device("trackpad", type, &cyapa_device);
return (!tp) ? -EAGAIN : 0;
}
static int setup_atmel_224s_tp(enum i2c_adapter_type type)
{
const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
ATMEL_TP_I2C_ADDR,
I2C_CLIENT_END };
if (tp)
return 0;
/* add atmel mxt touchpad */
tp = add_probed_i2c_device("trackpad", type,
&atmel_224s_tp_device, addr_list);
return (!tp) ? -EAGAIN : 0;
}
static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
{
const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
ATMEL_TS_I2C_ADDR,
I2C_CLIENT_END };
if (ts)
return 0;
/* add atmel mxt touch device */
ts = add_probed_i2c_device("touchscreen", type,
&atmel_1664s_device, addr_list);
return (!ts) ? -EAGAIN : 0;
}
static int setup_isl29018_als(enum i2c_adapter_type type)
{
if (als)
return 0;
/* add isl29018 light sensor */
als = add_i2c_device("lightsensor", type, &isl_als_device);
return (!als) ? -EAGAIN : 0;
}
static int setup_tsl2583_als(enum i2c_adapter_type type)
{
if (als)
return 0;
/* add tsl2583 light sensor */
als = add_i2c_device(NULL, type, &tsl2583_als_device);
return (!als) ? -EAGAIN : 0;
}
static int setup_tsl2563_als(enum i2c_adapter_type type)
{
if (als)
return 0;
/* add tsl2563 light sensor */
als = add_i2c_device(NULL, type, &tsl2563_als_device);
return (!als) ? -EAGAIN : 0;
}
static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
{
cros_laptop = (void *)id->driver_data;
pr_debug("DMI Matched %s.\n", id->ident);
/* Indicate to dmi_scan that processing is done. */
return 1;
}
static int chromeos_laptop_probe(struct platform_device *pdev)
{
int i;
int ret = 0;
for (i = 0; i < MAX_I2C_PERIPHERALS; i++) {
struct i2c_peripheral *i2c_dev;
i2c_dev = &cros_laptop->i2c_peripherals[i];
/* No more peripherals. */
if (i2c_dev->add == NULL)
break;
/* Add the device. Set -EPROBE_DEFER on any failure */
if (i2c_dev->add(i2c_dev->type))
ret = -EPROBE_DEFER;
}
return ret;
}
static struct chromeos_laptop samsung_series_5_550 = {
.i2c_peripherals = {
/* Touchpad. */
{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
/* Light Sensor. */
{ .add = setup_isl29018_als, I2C_ADAPTER_SMBUS },
},
};
static struct chromeos_laptop samsung_series_5 = {
.i2c_peripherals = {
/* Light Sensor. */
{ .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
},
};
static struct chromeos_laptop chromebook_pixel = {
.i2c_peripherals = {
/* Touch Screen. */
{ .add = setup_atmel_1664s_ts, I2C_ADAPTER_PANEL },
/* Touchpad. */
{ .add = setup_atmel_224s_tp, I2C_ADAPTER_VGADDC },
/* Light Sensor. */
{ .add = setup_isl29018_als, I2C_ADAPTER_PANEL },
},
};
static struct chromeos_laptop acer_c7_chromebook = {
.i2c_peripherals = {
/* Touchpad. */
{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
},
};
static struct chromeos_laptop acer_ac700 = {
.i2c_peripherals = {
/* Light Sensor. */
{ .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
},
};
static struct chromeos_laptop hp_pavilion_14_chromebook = {
.i2c_peripherals = {
/* Touchpad. */
{ .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
},
};
static struct chromeos_laptop cr48 = {
.i2c_peripherals = {
/* Light Sensor. */
{ .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
},
};
#define _CBDD(board_) \
.callback = chromeos_laptop_dmi_matched, \
.driver_data = (void *)&board_
static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
{
.ident = "Samsung Series 5 550",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
},
_CBDD(samsung_series_5_550),
},
{
.ident = "Samsung Series 5",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
},
_CBDD(samsung_series_5),
},
{
.ident = "Chromebook Pixel",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
},
_CBDD(chromebook_pixel),
},
{
.ident = "Acer C7 Chromebook",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
},
_CBDD(acer_c7_chromebook),
},
{
.ident = "Acer AC700",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
},
_CBDD(acer_ac700),
},
{
.ident = "HP Pavilion 14 Chromebook",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
},
_CBDD(hp_pavilion_14_chromebook),
},
{
.ident = "Cr-48",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
},
_CBDD(cr48),
},
{ }
};
MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
static struct platform_device *cros_platform_device;
static struct platform_driver cros_platform_driver = {
.driver = {
.name = "chromeos_laptop",
.owner = THIS_MODULE,
},
.probe = chromeos_laptop_probe,
};
static int __init chromeos_laptop_init(void)
{
int ret;
if (!dmi_check_system(chromeos_laptop_dmi_table)) {
pr_debug("%s unsupported system.\n", __func__);
return -ENODEV;
}
ret = platform_driver_register(&cros_platform_driver);
if (ret)
return ret;
cros_platform_device = platform_device_alloc("chromeos_laptop", -1);
if (!cros_platform_device) {
ret = -ENOMEM;
goto fail_platform_device1;
}
ret = platform_device_add(cros_platform_device);
if (ret)
goto fail_platform_device2;
return 0;
fail_platform_device2:
platform_device_put(cros_platform_device);
fail_platform_device1:
platform_driver_unregister(&cros_platform_driver);
return ret;
}
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);
platform_device_unregister(cros_platform_device);
platform_driver_unregister(&cros_platform_driver);
}
module_init(chromeos_laptop_init);
module_exit(chromeos_laptop_exit);
MODULE_DESCRIPTION("Chrome OS Laptop driver");
MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
MODULE_LICENSE("GPL");
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