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-rw-r--r--drivers/platform/chrome/chromeos_laptop.c960
1 files changed, 960 insertions, 0 deletions
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
new file mode 100644
index 000000000..a2cdbfbae
--- /dev/null
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -0,0 +1,960 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Driver to instantiate Chromebook i2c/smbus devices.
+//
+// Copyright (C) 2012 Google, Inc.
+// Author: Benson Leung <bleung@chromium.org>
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/property.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 ELAN_TP_I2C_ADDR 0x15
+#define ISL_ALS_I2C_ADDR 0x44
+#define TAOS_ALS_I2C_ADDR 0x29
+
+static const char *i2c_adapter_names[] = {
+ "SMBus I801 adapter",
+ "i915 gmbus vga",
+ "i915 gmbus panel",
+ "Synopsys DesignWare I2C adapter",
+};
+
+/* Keep this enum consistent with i2c_adapter_names */
+enum i2c_adapter_type {
+ I2C_ADAPTER_SMBUS = 0,
+ I2C_ADAPTER_VGADDC,
+ I2C_ADAPTER_PANEL,
+ I2C_ADAPTER_DESIGNWARE,
+};
+
+struct i2c_peripheral {
+ struct i2c_board_info board_info;
+ unsigned short alt_addr;
+
+ const char *dmi_name;
+ unsigned long irqflags;
+ struct resource irq_resource;
+
+ enum i2c_adapter_type type;
+ u32 pci_devid;
+
+ const struct property_entry *properties;
+
+ struct i2c_client *client;
+};
+
+struct acpi_peripheral {
+ char hid[ACPI_ID_LEN];
+ struct software_node swnode;
+ struct i2c_client *client;
+};
+
+struct chromeos_laptop {
+ /*
+ * Note that we can't mark this pointer as const because
+ * i2c_new_scanned_device() changes passed in I2C board info, so.
+ */
+ struct i2c_peripheral *i2c_peripherals;
+ unsigned int num_i2c_peripherals;
+
+ struct acpi_peripheral *acpi_peripherals;
+ unsigned int num_acpi_peripherals;
+};
+
+static const struct chromeos_laptop *cros_laptop;
+
+static struct i2c_client *
+chromes_laptop_instantiate_i2c_device(struct i2c_adapter *adapter,
+ struct i2c_board_info *info,
+ unsigned short alt_addr)
+{
+ const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
+ struct i2c_client *client;
+
+ /*
+ * Add the i2c device. If we can't detect it at the primary
+ * address we scan secondary addresses. In any case the client
+ * structure gets assigned primary address.
+ */
+ client = i2c_new_scanned_device(adapter, info, addr_list, NULL);
+ if (IS_ERR(client) && alt_addr) {
+ struct i2c_board_info dummy_info = {
+ I2C_BOARD_INFO("dummy", info->addr),
+ };
+ const unsigned short alt_addr_list[] = {
+ alt_addr, I2C_CLIENT_END
+ };
+ struct i2c_client *dummy;
+
+ dummy = i2c_new_scanned_device(adapter, &dummy_info,
+ alt_addr_list, NULL);
+ if (!IS_ERR(dummy)) {
+ pr_debug("%d-%02x is probed at %02x\n",
+ adapter->nr, info->addr, dummy->addr);
+ i2c_unregister_device(dummy);
+ client = i2c_new_client_device(adapter, info);
+ }
+ }
+
+ if (IS_ERR(client)) {
+ client = NULL;
+ pr_debug("failed to register device %d-%02x\n",
+ adapter->nr, info->addr);
+ } else {
+ pr_debug("added i2c device %d-%02x\n",
+ adapter->nr, info->addr);
+ }
+
+ return client;
+}
+
+static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid)
+{
+ struct pci_dev *pdev;
+
+ if (!dev_is_pci(dev))
+ return false;
+
+ pdev = to_pci_dev(dev);
+ return devid == pci_dev_id(pdev);
+}
+
+static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)
+{
+ struct i2c_peripheral *i2c_dev;
+ int i;
+
+ for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
+ i2c_dev = &cros_laptop->i2c_peripherals[i];
+
+ /* Skip devices already created */
+ if (i2c_dev->client)
+ continue;
+
+ if (strncmp(adapter->name, i2c_adapter_names[i2c_dev->type],
+ strlen(i2c_adapter_names[i2c_dev->type])))
+ continue;
+
+ if (i2c_dev->pci_devid &&
+ !chromeos_laptop_match_adapter_devid(adapter->dev.parent,
+ i2c_dev->pci_devid)) {
+ continue;
+ }
+
+ i2c_dev->client =
+ chromes_laptop_instantiate_i2c_device(adapter,
+ &i2c_dev->board_info,
+ i2c_dev->alt_addr);
+ }
+}
+
+static bool chromeos_laptop_adjust_client(struct i2c_client *client)
+{
+ struct acpi_peripheral *acpi_dev;
+ struct acpi_device_id acpi_ids[2] = { };
+ int i;
+ int error;
+
+ if (!has_acpi_companion(&client->dev))
+ return false;
+
+ for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
+ acpi_dev = &cros_laptop->acpi_peripherals[i];
+
+ memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN);
+
+ if (acpi_match_device(acpi_ids, &client->dev)) {
+ error = device_add_software_node(&client->dev, &acpi_dev->swnode);
+ if (error) {
+ dev_err(&client->dev,
+ "failed to add properties: %d\n",
+ error);
+ break;
+ }
+
+ acpi_dev->client = client;
+
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static void chromeos_laptop_detach_i2c_client(struct i2c_client *client)
+{
+ struct acpi_peripheral *acpi_dev;
+ struct i2c_peripheral *i2c_dev;
+ int i;
+
+ if (has_acpi_companion(&client->dev))
+ for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
+ acpi_dev = &cros_laptop->acpi_peripherals[i];
+
+ if (acpi_dev->client == client) {
+ acpi_dev->client = NULL;
+ return;
+ }
+ }
+ else
+ for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
+ i2c_dev = &cros_laptop->i2c_peripherals[i];
+
+ if (i2c_dev->client == client) {
+ i2c_dev->client = NULL;
+ return;
+ }
+ }
+}
+
+static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (dev->type == &i2c_adapter_type)
+ chromeos_laptop_check_adapter(to_i2c_adapter(dev));
+ else if (dev->type == &i2c_client_type)
+ chromeos_laptop_adjust_client(to_i2c_client(dev));
+ break;
+
+ case BUS_NOTIFY_REMOVED_DEVICE:
+ if (dev->type == &i2c_client_type)
+ chromeos_laptop_detach_i2c_client(to_i2c_client(dev));
+ break;
+ }
+
+ return 0;
+}
+
+static struct notifier_block chromeos_laptop_i2c_notifier = {
+ .notifier_call = chromeos_laptop_i2c_notifier_call,
+};
+
+#define DECLARE_CROS_LAPTOP(_name) \
+static const struct chromeos_laptop _name __initconst = { \
+ .i2c_peripherals = _name##_peripherals, \
+ .num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \
+}
+
+#define DECLARE_ACPI_CROS_LAPTOP(_name) \
+static const struct chromeos_laptop _name __initconst = { \
+ .acpi_peripherals = _name##_peripherals, \
+ .num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \
+}
+
+static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_SMBUS,
+ },
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
+ },
+ .dmi_name = "lightsensor",
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(samsung_series_5_550);
+
+static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = {
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
+ },
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(samsung_series_5);
+
+static const int chromebook_pixel_tp_keys[] __initconst = {
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ BTN_LEFT
+};
+
+static const struct property_entry
+chromebook_pixel_trackpad_props[] __initconst = {
+ PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
+ PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys),
+ { }
+};
+
+static const struct property_entry
+chromebook_atmel_touchscreen_props[] __initconst = {
+ PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
+ { }
+};
+
+static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
+ /* Touch Screen. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("atmel_mxt_ts",
+ ATMEL_TS_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "touchscreen",
+ .irqflags = IRQF_TRIGGER_FALLING,
+ .type = I2C_ADAPTER_PANEL,
+ .alt_addr = ATMEL_TS_I2C_BL_ADDR,
+ .properties = chromebook_atmel_touchscreen_props,
+ },
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("atmel_mxt_tp",
+ ATMEL_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .irqflags = IRQF_TRIGGER_FALLING,
+ .type = I2C_ADAPTER_VGADDC,
+ .alt_addr = ATMEL_TP_I2C_BL_ADDR,
+ .properties = chromebook_pixel_trackpad_props,
+ },
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
+ },
+ .dmi_name = "lightsensor",
+ .type = I2C_ADAPTER_PANEL,
+ },
+};
+DECLARE_CROS_LAPTOP(chromebook_pixel);
+
+static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ },
+};
+DECLARE_CROS_LAPTOP(hp_chromebook_14);
+
+static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ },
+ /* Elan Touchpad option. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ },
+};
+DECLARE_CROS_LAPTOP(dell_chromebook_11);
+
+static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ },
+};
+DECLARE_CROS_LAPTOP(toshiba_cb35);
+
+static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(acer_c7_chromebook);
+
+static struct i2c_peripheral acer_ac700_peripherals[] __initdata = {
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
+ },
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(acer_ac700);
+
+static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
+ /* Touchscreen. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("atmel_mxt_ts",
+ ATMEL_TS_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "touchscreen",
+ .irqflags = IRQF_TRIGGER_FALLING,
+ .type = I2C_ADAPTER_DESIGNWARE,
+ .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
+ .alt_addr = ATMEL_TS_I2C_BL_ADDR,
+ .properties = chromebook_atmel_touchscreen_props,
+ },
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
+ },
+ /* Elan Touchpad option. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
+ },
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
+ },
+ .dmi_name = "lightsensor",
+ .type = I2C_ADAPTER_DESIGNWARE,
+ .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
+ },
+};
+DECLARE_CROS_LAPTOP(acer_c720);
+
+static struct i2c_peripheral
+hp_pavilion_14_chromebook_peripherals[] __initdata = {
+ /* Touchpad. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+ },
+ .dmi_name = "trackpad",
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook);
+
+static struct i2c_peripheral cr48_peripherals[] __initdata = {
+ /* Light Sensor. */
+ {
+ .board_info = {
+ I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
+ },
+ .type = I2C_ADAPTER_SMBUS,
+ },
+};
+DECLARE_CROS_LAPTOP(cr48);
+
+static const u32 samus_touchpad_buttons[] __initconst = {
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ BTN_LEFT
+};
+
+static const struct property_entry samus_trackpad_props[] __initconst = {
+ PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
+ PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons),
+ { }
+};
+
+static struct acpi_peripheral samus_peripherals[] __initdata = {
+ /* Touchpad */
+ {
+ .hid = "ATML0000",
+ .swnode = {
+ .properties = samus_trackpad_props,
+ },
+ },
+ /* Touchsceen */
+ {
+ .hid = "ATML0001",
+ .swnode = {
+ .properties = chromebook_atmel_touchscreen_props,
+ },
+ },
+};
+DECLARE_ACPI_CROS_LAPTOP(samus);
+
+static struct acpi_peripheral generic_atmel_peripherals[] __initdata = {
+ /* Touchpad */
+ {
+ .hid = "ATML0000",
+ .swnode = {
+ .properties = chromebook_pixel_trackpad_props,
+ },
+ },
+ /* Touchsceen */
+ {
+ .hid = "ATML0001",
+ .swnode = {
+ .properties = chromebook_atmel_touchscreen_props,
+ },
+ },
+};
+DECLARE_ACPI_CROS_LAPTOP(generic_atmel);
+
+static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = {
+ {
+ .ident = "Samsung Series 5 550",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
+ },
+ .driver_data = (void *)&samsung_series_5_550,
+ },
+ {
+ .ident = "Samsung Series 5",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
+ },
+ .driver_data = (void *)&samsung_series_5,
+ },
+ {
+ .ident = "Chromebook Pixel",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
+ },
+ .driver_data = (void *)&chromebook_pixel,
+ },
+ {
+ .ident = "Wolf",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
+ },
+ .driver_data = (void *)&dell_chromebook_11,
+ },
+ {
+ .ident = "HP Chromebook 14",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
+ },
+ .driver_data = (void *)&hp_chromebook_14,
+ },
+ {
+ .ident = "Toshiba CB35",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
+ },
+ .driver_data = (void *)&toshiba_cb35,
+ },
+ {
+ .ident = "Acer C7 Chromebook",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
+ },
+ .driver_data = (void *)&acer_c7_chromebook,
+ },
+ {
+ .ident = "Acer AC700",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
+ },
+ .driver_data = (void *)&acer_ac700,
+ },
+ {
+ .ident = "Acer C720",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
+ },
+ .driver_data = (void *)&acer_c720,
+ },
+ {
+ .ident = "HP Pavilion 14 Chromebook",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
+ },
+ .driver_data = (void *)&hp_pavilion_14_chromebook,
+ },
+ {
+ .ident = "Cr-48",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
+ },
+ .driver_data = (void *)&cr48,
+ },
+ /* Devices with peripherals incompletely described in ACPI */
+ {
+ .ident = "Chromebook Pro",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Google"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Caroline"),
+ },
+ .driver_data = (void *)&samus,
+ },
+ {
+ .ident = "Google Pixel 2 (2015)",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
+ },
+ .driver_data = (void *)&samus,
+ },
+ {
+ .ident = "Samsung Chromebook 3",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
+ },
+ .driver_data = (void *)&samus,
+ },
+ {
+ /*
+ * Other Chromebooks with Atmel touch controllers:
+ * - Winky (touchpad)
+ * - Clapper, Expresso, Rambi, Glimmer (touchscreen)
+ */
+ .ident = "Other Chromebook",
+ .matches = {
+ /*
+ * This will match all Google devices, not only devices
+ * with Atmel, but we will validate that the device
+ * actually has matching peripherals.
+ */
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ },
+ .driver_data = (void *)&generic_atmel,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
+
+static int __init chromeos_laptop_scan_peripherals(struct device *dev, void *data)
+{
+ int error;
+
+ if (dev->type == &i2c_adapter_type) {
+ chromeos_laptop_check_adapter(to_i2c_adapter(dev));
+ } else if (dev->type == &i2c_client_type) {
+ if (chromeos_laptop_adjust_client(to_i2c_client(dev))) {
+ /*
+ * Now that we have needed properties re-trigger
+ * driver probe in case driver was initialized
+ * earlier and probe failed.
+ */
+ error = device_attach(dev);
+ if (error < 0)
+ dev_warn(dev,
+ "%s: device_attach() failed: %d\n",
+ __func__, error);
+ }
+ }
+
+ return 0;
+}
+
+static int __init chromeos_laptop_get_irq_from_dmi(const char *dmi_name)
+{
+ const struct dmi_device *dmi_dev;
+ const struct dmi_dev_onboard *dev_data;
+
+ dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, dmi_name, NULL);
+ if (!dmi_dev) {
+ pr_err("failed to find DMI device '%s'\n", dmi_name);
+ return -ENOENT;
+ }
+
+ dev_data = dmi_dev->device_data;
+ if (!dev_data) {
+ pr_err("failed to get data from DMI for '%s'\n", dmi_name);
+ return -EINVAL;
+ }
+
+ return dev_data->instance;
+}
+
+static int __init chromeos_laptop_setup_irq(struct i2c_peripheral *i2c_dev)
+{
+ int irq;
+
+ if (i2c_dev->dmi_name) {
+ irq = chromeos_laptop_get_irq_from_dmi(i2c_dev->dmi_name);
+ if (irq < 0)
+ return irq;
+
+ i2c_dev->irq_resource = (struct resource)
+ DEFINE_RES_NAMED(irq, 1, NULL,
+ IORESOURCE_IRQ | i2c_dev->irqflags);
+ i2c_dev->board_info.resources = &i2c_dev->irq_resource;
+ i2c_dev->board_info.num_resources = 1;
+ }
+
+ return 0;
+}
+
+static int __init
+chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop,
+ const struct chromeos_laptop *src)
+{
+ struct i2c_peripheral *i2c_peripherals;
+ struct i2c_peripheral *i2c_dev;
+ struct i2c_board_info *info;
+ int i;
+ int error;
+
+ if (!src->num_i2c_peripherals)
+ return 0;
+
+ i2c_peripherals = kmemdup(src->i2c_peripherals,
+ src->num_i2c_peripherals *
+ sizeof(*src->i2c_peripherals),
+ GFP_KERNEL);
+ if (!i2c_peripherals)
+ return -ENOMEM;
+
+ for (i = 0; i < src->num_i2c_peripherals; i++) {
+ i2c_dev = &i2c_peripherals[i];
+ info = &i2c_dev->board_info;
+
+ error = chromeos_laptop_setup_irq(i2c_dev);
+ if (error)
+ goto err_out;
+
+ /* Create primary fwnode for the device - copies everything */
+ if (i2c_dev->properties) {
+ info->fwnode = fwnode_create_software_node(i2c_dev->properties, NULL);
+ if (IS_ERR(info->fwnode)) {
+ error = PTR_ERR(info->fwnode);
+ goto err_out;
+ }
+ }
+ }
+
+ cros_laptop->i2c_peripherals = i2c_peripherals;
+ cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals;
+
+ return 0;
+
+err_out:
+ while (--i >= 0) {
+ i2c_dev = &i2c_peripherals[i];
+ info = &i2c_dev->board_info;
+ if (!IS_ERR_OR_NULL(info->fwnode))
+ fwnode_remove_software_node(info->fwnode);
+ }
+ kfree(i2c_peripherals);
+ return error;
+}
+
+static int __init
+chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop,
+ const struct chromeos_laptop *src)
+{
+ struct acpi_peripheral *acpi_peripherals;
+ struct acpi_peripheral *acpi_dev;
+ const struct acpi_peripheral *src_dev;
+ int n_peripherals = 0;
+ int i;
+ int error;
+
+ for (i = 0; i < src->num_acpi_peripherals; i++) {
+ if (acpi_dev_present(src->acpi_peripherals[i].hid, NULL, -1))
+ n_peripherals++;
+ }
+
+ if (!n_peripherals)
+ return 0;
+
+ acpi_peripherals = kcalloc(n_peripherals,
+ sizeof(*src->acpi_peripherals),
+ GFP_KERNEL);
+ if (!acpi_peripherals)
+ return -ENOMEM;
+
+ acpi_dev = acpi_peripherals;
+ for (i = 0; i < src->num_acpi_peripherals; i++) {
+ src_dev = &src->acpi_peripherals[i];
+ if (!acpi_dev_present(src_dev->hid, NULL, -1))
+ continue;
+
+ *acpi_dev = *src_dev;
+
+ /* We need to deep-copy properties */
+ if (src_dev->swnode.properties) {
+ acpi_dev->swnode.properties =
+ property_entries_dup(src_dev->swnode.properties);
+ if (IS_ERR(acpi_dev->swnode.properties)) {
+ error = PTR_ERR(acpi_dev->swnode.properties);
+ goto err_out;
+ }
+ }
+
+ acpi_dev++;
+ }
+
+ cros_laptop->acpi_peripherals = acpi_peripherals;
+ cros_laptop->num_acpi_peripherals = n_peripherals;
+
+ return 0;
+
+err_out:
+ while (--i >= 0) {
+ acpi_dev = &acpi_peripherals[i];
+ if (!IS_ERR_OR_NULL(acpi_dev->swnode.properties))
+ property_entries_free(acpi_dev->swnode.properties);
+ }
+
+ kfree(acpi_peripherals);
+ return error;
+}
+
+static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
+{
+ const struct acpi_peripheral *acpi_dev;
+ struct i2c_peripheral *i2c_dev;
+ int i;
+
+ for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
+ i2c_dev = &cros_laptop->i2c_peripherals[i];
+ i2c_unregister_device(i2c_dev->client);
+ }
+
+ for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
+ acpi_dev = &cros_laptop->acpi_peripherals[i];
+
+ if (acpi_dev->client)
+ device_remove_software_node(&acpi_dev->client->dev);
+
+ property_entries_free(acpi_dev->swnode.properties);
+ }
+
+ kfree(cros_laptop->i2c_peripherals);
+ kfree(cros_laptop->acpi_peripherals);
+ kfree(cros_laptop);
+}
+
+static struct chromeos_laptop * __init
+chromeos_laptop_prepare(const struct chromeos_laptop *src)
+{
+ struct chromeos_laptop *cros_laptop;
+ int error;
+
+ cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL);
+ if (!cros_laptop)
+ return ERR_PTR(-ENOMEM);
+
+ error = chromeos_laptop_prepare_i2c_peripherals(cros_laptop, src);
+ if (!error)
+ error = chromeos_laptop_prepare_acpi_peripherals(cros_laptop,
+ src);
+
+ if (error) {
+ chromeos_laptop_destroy(cros_laptop);
+ return ERR_PTR(error);
+ }
+
+ return cros_laptop;
+}
+
+static int __init chromeos_laptop_init(void)
+{
+ const struct dmi_system_id *dmi_id;
+ int error;
+
+ dmi_id = dmi_first_match(chromeos_laptop_dmi_table);
+ if (!dmi_id) {
+ pr_debug("unsupported system\n");
+ return -ENODEV;
+ }
+
+ pr_debug("DMI Matched %s\n", dmi_id->ident);
+
+ cros_laptop = chromeos_laptop_prepare((void *)dmi_id->driver_data);
+ if (IS_ERR(cros_laptop))
+ return PTR_ERR(cros_laptop);
+
+ if (!cros_laptop->num_i2c_peripherals &&
+ !cros_laptop->num_acpi_peripherals) {
+ pr_debug("no relevant devices detected\n");
+ error = -ENODEV;
+ goto err_destroy_cros_laptop;
+ }
+
+ error = bus_register_notifier(&i2c_bus_type,
+ &chromeos_laptop_i2c_notifier);
+ if (error) {
+ pr_err("failed to register i2c bus notifier: %d\n",
+ error);
+ goto err_destroy_cros_laptop;
+ }
+
+ /*
+ * Scan adapters that have been registered and clients that have
+ * been created before we installed the notifier to make sure
+ * we do not miss any devices.
+ */
+ i2c_for_each_dev(NULL, chromeos_laptop_scan_peripherals);
+
+ return 0;
+
+err_destroy_cros_laptop:
+ chromeos_laptop_destroy(cros_laptop);
+ return error;
+}
+
+static void __exit chromeos_laptop_exit(void)
+{
+ bus_unregister_notifier(&i2c_bus_type, &chromeos_laptop_i2c_notifier);
+ chromeos_laptop_destroy(cros_laptop);
+}
+
+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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 21:09:20 +0000