summaryrefslogtreecommitdiff
path: root/drivers/platform
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/chrome/Kconfig14
-rw-r--r--drivers/platform/chrome/Makefile1
-rw-r--r--drivers/platform/chrome/chromeos_laptop.c298
-rw-r--r--drivers/platform/chrome/chromeos_pstore.c101
4 files changed, 323 insertions, 91 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index b13303e75a34..440ed776efd4 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -25,4 +25,18 @@ config CHROMEOS_LAPTOP
If you have a supported Chromebook, choose Y or M here.
The module will be called chromeos_laptop.
+config CHROMEOS_PSTORE
+ tristate "Chrome OS pstore support"
+ ---help---
+ This module instantiates the persistent storage on x86 ChromeOS
+ devices. It can be used to store away console logs and crash
+ information across reboots.
+
+ The range of memory used is 0xf00000-0x1000000, traditionally
+ the memory used to back VGA controller memory.
+
+ If you have a supported Chromebook, choose Y or M here.
+ The module will be called chromeos_pstore.
+
+
endif # CHROMEOS_PLATFORMS
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index 015e9195e226..2b860ca7450f 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o
+obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 3e5b4497a1d0..7f3aad0e115c 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -27,6 +27,7 @@
#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
@@ -40,7 +41,7 @@ static struct i2c_client *als;
static struct i2c_client *tp;
static struct i2c_client *ts;
-const char *i2c_adapter_names[] = {
+static const char *i2c_adapter_names[] = {
"SMBus I801 adapter",
"i915 gmbus vga",
"i915 gmbus panel",
@@ -53,20 +54,33 @@ enum i2c_adapter_type {
I2C_ADAPTER_PANEL,
};
-static struct i2c_board_info __initdata cyapa_device = {
+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 __initdata isl_als_device = {
+static struct i2c_board_info isl_als_device = {
I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
};
-static struct i2c_board_info __initdata tsl2583_als_device = {
+static struct i2c_board_info tsl2583_als_device = {
I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
};
-static struct i2c_board_info __initdata tsl2563_als_device = {
+static struct i2c_board_info tsl2563_als_device = {
I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
};
@@ -89,7 +103,7 @@ static struct mxt_platform_data atmel_224s_tp_platform_data = {
.config_length = 0,
};
-static struct i2c_board_info __initdata atmel_224s_tp_device = {
+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,
@@ -110,13 +124,13 @@ static struct mxt_platform_data atmel_1664s_platform_data = {
.config_length = 0,
};
-static struct i2c_board_info __initdata atmel_1664s_device = {
+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 __init *__add_probed_i2c_device(
+static struct i2c_client *__add_probed_i2c_device(
const char *name,
int bus,
struct i2c_board_info *info,
@@ -169,7 +183,7 @@ static struct i2c_client __init *__add_probed_i2c_device(
return client;
}
-static int __init __find_i2c_adap(struct device *dev, void *data)
+static int __find_i2c_adap(struct device *dev, void *data)
{
const char *name = data;
static const char *prefix = "i2c-";
@@ -180,7 +194,7 @@ static int __init __find_i2c_adap(struct device *dev, void *data)
return (strncmp(adapter->name, name, strlen(name)) == 0);
}
-static int __init find_i2c_adapter_num(enum i2c_adapter_type type)
+static int find_i2c_adapter_num(enum i2c_adapter_type type)
{
struct device *dev = NULL;
struct i2c_adapter *adapter;
@@ -189,8 +203,9 @@ static int __init find_i2c_adapter_num(enum i2c_adapter_type type)
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);
+ /* 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);
@@ -205,7 +220,7 @@ static int __init find_i2c_adapter_num(enum i2c_adapter_type type)
* Returns NULL if no devices found.
* See Documentation/i2c/instantiating-devices for more information.
*/
-static __init struct i2c_client *add_probed_i2c_device(
+static struct i2c_client *add_probed_i2c_device(
const char *name,
enum i2c_adapter_type type,
struct i2c_board_info *info,
@@ -222,7 +237,7 @@ static __init struct i2c_client *add_probed_i2c_device(
* info->addr.
* Returns NULL if no device found.
*/
-static __init struct i2c_client *add_i2c_device(const char *name,
+static struct i2c_client *add_i2c_device(const char *name,
enum i2c_adapter_type type,
struct i2c_board_info *info)
{
@@ -233,161 +248,259 @@ static __init struct i2c_client *add_i2c_device(const char *name,
addr_list);
}
-
-static struct i2c_client __init *add_smbus_device(const char *name,
- struct i2c_board_info *info)
+static int setup_cyapa_tp(enum i2c_adapter_type type)
{
- return add_i2c_device(name, I2C_ADAPTER_SMBUS, info);
-}
+ if (tp)
+ return 0;
-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;
+ /* add cyapa touchpad */
+ tp = add_i2c_device("trackpad", type, &cyapa_device);
+ return (!tp) ? -EAGAIN : 0;
}
-static int __init setup_atmel_224s_tp(const struct dmi_system_id *id)
+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 on VGA DDC GMBus */
- tp = add_probed_i2c_device("trackpad", I2C_ADAPTER_VGADDC,
+ /* add atmel mxt touchpad */
+ tp = add_probed_i2c_device("trackpad", type,
&atmel_224s_tp_device, addr_list);
- return 0;
+ return (!tp) ? -EAGAIN : 0;
}
-static int __init setup_atmel_1664s_ts(const struct dmi_system_id *id)
+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 on PANEL GMBus */
- ts = add_probed_i2c_device("touchscreen", I2C_ADAPTER_PANEL,
+ /* add atmel mxt touch device */
+ ts = add_probed_i2c_device("touchscreen", type,
&atmel_1664s_device, addr_list);
- return 0;
+ return (!ts) ? -EAGAIN : 0;
}
-
-static int __init setup_isl29018_als(const struct dmi_system_id *id)
+static int setup_isl29018_als(enum i2c_adapter_type type)
{
+ if (als)
+ return 0;
+
/* add isl29018 light sensor */
- als = add_smbus_device("lightsensor", &isl_als_device);
- return 0;
+ als = add_i2c_device("lightsensor", type, &isl_als_device);
+ return (!als) ? -EAGAIN : 0;
}
-static int __init setup_isl29023_als(const struct dmi_system_id *id)
+static int setup_tsl2583_als(enum i2c_adapter_type type)
{
- /* add isl29023 light sensor on Panel GMBus */
- als = add_i2c_device("lightsensor", I2C_ADAPTER_PANEL,
- &isl_als_device);
- return 0;
+ if (als)
+ return 0;
+
+ /* add tsl2583 light sensor */
+ als = add_i2c_device(NULL, type, &tsl2583_als_device);
+ return (!als) ? -EAGAIN : 0;
}
-static int __init setup_tsl2583_als(const struct dmi_system_id *id)
+static int setup_tsl2563_als(enum i2c_adapter_type type)
{
- /* add tsl2583 light sensor on smbus */
- als = add_smbus_device(NULL, &tsl2583_als_device);
- return 0;
+ if (als)
+ return 0;
+
+ /* add tsl2563 light sensor */
+ als = add_i2c_device(NULL, type, &tsl2563_als_device);
+ return (!als) ? -EAGAIN : 0;
}
-static int __init setup_tsl2563_als(const struct dmi_system_id *id)
+static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
{
- /* add tsl2563 light sensor on smbus */
- als = add_smbus_device(NULL, &tsl2563_als_device);
- return 0;
+ 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 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,
+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 },
},
- {
- .ident = "Chromebook Pixel - Touchscreen",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
- },
- .callback = setup_atmel_1664s_ts,
+};
+
+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 = "Chromebook Pixel - Touchpad",
+ .ident = "Samsung Series 5 550",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
},
- .callback = setup_atmel_224s_tp,
+ _CBDD(samsung_series_5_550),
},
{
- .ident = "Samsung Series 5 550 - Light Sensor",
+ .ident = "Samsung Series 5",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
},
- .callback = setup_isl29018_als,
+ _CBDD(samsung_series_5),
},
{
- .ident = "Chromebook Pixel - Light Sensor",
+ .ident = "Chromebook Pixel",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
},
- .callback = setup_isl29023_als,
+ _CBDD(chromebook_pixel),
},
{
- .ident = "Acer C7 Chromebook - Touchpad",
+ .ident = "Acer C7 Chromebook",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
},
- .callback = setup_cyapa_smbus_tp,
+ _CBDD(acer_c7_chromebook),
},
{
- .ident = "HP Pavilion 14 Chromebook - Touchpad",
+ .ident = "Acer AC700",
.matches = {
- DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
},
- .callback = setup_cyapa_smbus_tp,
+ _CBDD(acer_ac700),
},
{
- .ident = "Samsung Series 5 - Light Sensor",
+ .ident = "HP Pavilion 14 Chromebook",
.matches = {
- DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
},
- .callback = setup_tsl2583_als,
+ _CBDD(hp_pavilion_14_chromebook),
},
{
- .ident = "Cr-48 - Light Sensor",
+ .ident = "Cr-48",
.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,
+ _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)
@@ -398,6 +511,9 @@ static void __exit chromeos_laptop_exit(void)
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);
diff --git a/drivers/platform/chrome/chromeos_pstore.c b/drivers/platform/chrome/chromeos_pstore.c
new file mode 100644
index 000000000000..e0e0e65cf442
--- /dev/null
+++ b/drivers/platform/chrome/chromeos_pstore.c
@@ -0,0 +1,101 @@
+/*
+ * chromeos_pstore.c - Driver to instantiate Chromebook ramoops device
+ *
+ * Copyright (C) 2013 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, version 2 of the License.
+ */
+
+#include <linux/dmi.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pstore_ram.h>
+
+static struct dmi_system_id chromeos_pstore_dmi_table[] __initdata = {
+ {
+ /*
+ * Today all Chromebooks/boxes ship with GOOGLE as vendor and
+ * coreboot as bios vendor. No other systems with this
+ * combination are known to date.
+ */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ },
+ },
+ {
+ /*
+ * The first Samsung Chromebox and Chromebook Series 5 550 use
+ * coreboot but with Samsung as the system vendor.
+ */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ },
+ },
+ {
+ /* x86-alex, the first Samsung Chromebook. */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
+ },
+ },
+ {
+ /* x86-mario, the Cr-48 pilot device from Google. */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
+ },
+ },
+ {
+ /* x86-zgb, the first Acer Chromebook. */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
+ },
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(dmi, chromeos_pstore_dmi_table);
+
+/*
+ * On x86 chromebooks/boxes, the firmware will keep the legacy VGA memory
+ * range untouched across reboots, so we use that to store our pstore
+ * contents for panic logs, etc.
+ */
+static struct ramoops_platform_data chromeos_ramoops_data = {
+ .mem_size = 0x100000,
+ .mem_address = 0xf00000,
+ .record_size = 0x20000,
+ .console_size = 0x20000,
+ .ftrace_size = 0x20000,
+ .dump_oops = 1,
+};
+
+static struct platform_device chromeos_ramoops = {
+ .name = "ramoops",
+ .dev = {
+ .platform_data = &chromeos_ramoops_data,
+ },
+};
+
+static int __init chromeos_pstore_init(void)
+{
+ if (dmi_check_system(chromeos_pstore_dmi_table))
+ return platform_device_register(&chromeos_ramoops);
+
+ return -ENODEV;
+}
+
+static void __exit chromeos_pstore_exit(void)
+{
+ platform_device_unregister(&chromeos_ramoops);
+}
+
+module_init(chromeos_pstore_init);
+module_exit(chromeos_pstore_exit);
+
+MODULE_DESCRIPTION("Chrome OS pstore module");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 04:53:49 +0000