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938 lines
22 KiB
938 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// Driver to instantiate Chromebook i2c/smbus devices. |
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// |
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// Copyright (C) 2012 Google, Inc. |
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// Author: Benson Leung <[email protected]> |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/acpi.h> |
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#include <linux/dmi.h> |
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#include <linux/i2c.h> |
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#include <linux/input.h> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/platform_device.h> |
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#include <linux/property.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 ELAN_TP_I2C_ADDR 0x15 |
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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 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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"Synopsys DesignWare I2C adapter", |
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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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I2C_ADAPTER_DESIGNWARE, |
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}; |
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struct i2c_peripheral { |
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struct i2c_board_info board_info; |
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unsigned short alt_addr; |
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const char *dmi_name; |
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unsigned long irqflags; |
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struct resource irq_resource; |
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enum i2c_adapter_type type; |
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u32 pci_devid; |
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struct i2c_client *client; |
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}; |
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struct acpi_peripheral { |
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char hid[ACPI_ID_LEN]; |
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const struct property_entry *properties; |
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}; |
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struct chromeos_laptop { |
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/* |
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* Note that we can't mark this pointer as const because |
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* i2c_new_scanned_device() changes passed in I2C board info, so. |
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*/ |
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struct i2c_peripheral *i2c_peripherals; |
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unsigned int num_i2c_peripherals; |
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const struct acpi_peripheral *acpi_peripherals; |
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unsigned int num_acpi_peripherals; |
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}; |
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static const struct chromeos_laptop *cros_laptop; |
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static struct i2c_client * |
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chromes_laptop_instantiate_i2c_device(struct i2c_adapter *adapter, |
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struct i2c_board_info *info, |
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unsigned short alt_addr) |
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{ |
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const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END }; |
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struct i2c_client *client; |
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/* |
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* Add the i2c device. If we can't detect it at the primary |
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* address we scan secondary addresses. In any case the client |
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* structure gets assigned primary address. |
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*/ |
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client = i2c_new_scanned_device(adapter, info, addr_list, NULL); |
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if (IS_ERR(client) && alt_addr) { |
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struct i2c_board_info dummy_info = { |
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I2C_BOARD_INFO("dummy", info->addr), |
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}; |
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const unsigned short alt_addr_list[] = { |
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alt_addr, I2C_CLIENT_END |
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}; |
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struct i2c_client *dummy; |
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dummy = i2c_new_scanned_device(adapter, &dummy_info, |
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alt_addr_list, NULL); |
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if (!IS_ERR(dummy)) { |
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pr_debug("%d-%02x is probed at %02x\n", |
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adapter->nr, info->addr, dummy->addr); |
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i2c_unregister_device(dummy); |
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client = i2c_new_client_device(adapter, info); |
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} |
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} |
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if (IS_ERR(client)) { |
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client = NULL; |
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pr_debug("failed to register device %d-%02x\n", |
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adapter->nr, info->addr); |
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} else { |
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pr_debug("added i2c device %d-%02x\n", |
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adapter->nr, info->addr); |
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} |
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return client; |
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} |
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static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid) |
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{ |
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struct pci_dev *pdev; |
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if (!dev_is_pci(dev)) |
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return false; |
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pdev = to_pci_dev(dev); |
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return devid == pci_dev_id(pdev); |
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} |
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static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter) |
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{ |
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struct i2c_peripheral *i2c_dev; |
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int i; |
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for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
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i2c_dev = &cros_laptop->i2c_peripherals[i]; |
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/* Skip devices already created */ |
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if (i2c_dev->client) |
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continue; |
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if (strncmp(adapter->name, i2c_adapter_names[i2c_dev->type], |
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strlen(i2c_adapter_names[i2c_dev->type]))) |
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continue; |
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if (i2c_dev->pci_devid && |
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!chromeos_laptop_match_adapter_devid(adapter->dev.parent, |
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i2c_dev->pci_devid)) { |
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continue; |
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} |
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i2c_dev->client = |
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chromes_laptop_instantiate_i2c_device(adapter, |
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&i2c_dev->board_info, |
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i2c_dev->alt_addr); |
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} |
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} |
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static bool chromeos_laptop_adjust_client(struct i2c_client *client) |
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{ |
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const struct acpi_peripheral *acpi_dev; |
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struct acpi_device_id acpi_ids[2] = { }; |
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int i; |
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int error; |
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if (!has_acpi_companion(&client->dev)) |
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return false; |
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for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) { |
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acpi_dev = &cros_laptop->acpi_peripherals[i]; |
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memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN); |
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if (acpi_match_device(acpi_ids, &client->dev)) { |
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error = device_add_properties(&client->dev, |
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acpi_dev->properties); |
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if (error) { |
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dev_err(&client->dev, |
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"failed to add properties: %d\n", |
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error); |
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break; |
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} |
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return true; |
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} |
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} |
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return false; |
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} |
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static void chromeos_laptop_detach_i2c_client(struct i2c_client *client) |
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{ |
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struct i2c_peripheral *i2c_dev; |
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int i; |
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for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
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i2c_dev = &cros_laptop->i2c_peripherals[i]; |
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if (i2c_dev->client == client) |
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i2c_dev->client = NULL; |
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} |
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} |
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static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb, |
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unsigned long action, void *data) |
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{ |
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struct device *dev = data; |
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switch (action) { |
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case BUS_NOTIFY_ADD_DEVICE: |
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if (dev->type == &i2c_adapter_type) |
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chromeos_laptop_check_adapter(to_i2c_adapter(dev)); |
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else if (dev->type == &i2c_client_type) |
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chromeos_laptop_adjust_client(to_i2c_client(dev)); |
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break; |
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case BUS_NOTIFY_REMOVED_DEVICE: |
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if (dev->type == &i2c_client_type) |
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chromeos_laptop_detach_i2c_client(to_i2c_client(dev)); |
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break; |
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} |
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return 0; |
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} |
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static struct notifier_block chromeos_laptop_i2c_notifier = { |
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.notifier_call = chromeos_laptop_i2c_notifier_call, |
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}; |
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#define DECLARE_CROS_LAPTOP(_name) \ |
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static const struct chromeos_laptop _name __initconst = { \ |
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.i2c_peripherals = _name##_peripherals, \ |
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.num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \ |
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} |
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#define DECLARE_ACPI_CROS_LAPTOP(_name) \ |
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static const struct chromeos_laptop _name __initconst = { \ |
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.acpi_peripherals = _name##_peripherals, \ |
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.num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \ |
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} |
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static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
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}, |
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.dmi_name = "lightsensor", |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(samsung_series_5_550); |
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static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = { |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR), |
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}, |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(samsung_series_5); |
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static const int chromebook_pixel_tp_keys[] __initconst = { |
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KEY_RESERVED, |
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KEY_RESERVED, |
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KEY_RESERVED, |
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KEY_RESERVED, |
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KEY_RESERVED, |
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BTN_LEFT |
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}; |
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static const struct property_entry |
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chromebook_pixel_trackpad_props[] __initconst = { |
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PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
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PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys), |
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{ } |
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}; |
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static const struct property_entry |
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chromebook_atmel_touchscreen_props[] __initconst = { |
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PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
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{ } |
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}; |
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static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = { |
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/* Touch Screen. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("atmel_mxt_ts", |
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ATMEL_TS_I2C_ADDR), |
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.properties = |
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chromebook_atmel_touchscreen_props, |
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.flags = I2C_CLIENT_WAKE, |
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}, |
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.dmi_name = "touchscreen", |
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.irqflags = IRQF_TRIGGER_FALLING, |
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.type = I2C_ADAPTER_PANEL, |
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.alt_addr = ATMEL_TS_I2C_BL_ADDR, |
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}, |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("atmel_mxt_tp", |
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ATMEL_TP_I2C_ADDR), |
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.properties = |
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chromebook_pixel_trackpad_props, |
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.flags = I2C_CLIENT_WAKE, |
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}, |
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.dmi_name = "trackpad", |
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.irqflags = IRQF_TRIGGER_FALLING, |
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.type = I2C_ADAPTER_VGADDC, |
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.alt_addr = ATMEL_TP_I2C_BL_ADDR, |
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}, |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
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}, |
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.dmi_name = "lightsensor", |
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.type = I2C_ADAPTER_PANEL, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(chromebook_pixel); |
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static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(hp_chromebook_14); |
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static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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}, |
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/* Elan Touchpad option. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR), |
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.flags = I2C_CLIENT_WAKE, |
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}, |
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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(dell_chromebook_11); |
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static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(toshiba_cb35); |
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static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(acer_c7_chromebook); |
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static struct i2c_peripheral acer_ac700_peripherals[] __initdata = { |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR), |
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}, |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(acer_ac700); |
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static struct i2c_peripheral acer_c720_peripherals[] __initdata = { |
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/* Touchscreen. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("atmel_mxt_ts", |
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ATMEL_TS_I2C_ADDR), |
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.properties = |
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chromebook_atmel_touchscreen_props, |
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.flags = I2C_CLIENT_WAKE, |
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}, |
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.dmi_name = "touchscreen", |
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.irqflags = IRQF_TRIGGER_FALLING, |
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.type = I2C_ADAPTER_DESIGNWARE, |
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.pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)), |
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.alt_addr = ATMEL_TS_I2C_BL_ADDR, |
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}, |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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.pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)), |
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}, |
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/* Elan Touchpad option. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR), |
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.flags = I2C_CLIENT_WAKE, |
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}, |
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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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.pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)), |
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}, |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
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}, |
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.dmi_name = "lightsensor", |
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.type = I2C_ADAPTER_DESIGNWARE, |
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.pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)), |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(acer_c720); |
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|
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static struct i2c_peripheral |
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hp_pavilion_14_chromebook_peripherals[] __initdata = { |
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/* Touchpad. */ |
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{ |
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.board_info = { |
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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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.dmi_name = "trackpad", |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook); |
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|
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static struct i2c_peripheral cr48_peripherals[] __initdata = { |
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/* Light Sensor. */ |
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{ |
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.board_info = { |
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I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR), |
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}, |
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.type = I2C_ADAPTER_SMBUS, |
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}, |
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}; |
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DECLARE_CROS_LAPTOP(cr48); |
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|
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static const u32 samus_touchpad_buttons[] __initconst = { |
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KEY_RESERVED, |
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KEY_RESERVED, |
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KEY_RESERVED, |
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BTN_LEFT |
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}; |
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|
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static const struct property_entry samus_trackpad_props[] __initconst = { |
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PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
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PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons), |
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{ } |
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}; |
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|
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static struct acpi_peripheral samus_peripherals[] __initdata = { |
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/* Touchpad */ |
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{ |
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.hid = "ATML0000", |
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.properties = samus_trackpad_props, |
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}, |
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/* Touchsceen */ |
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{ |
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.hid = "ATML0001", |
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.properties = chromebook_atmel_touchscreen_props, |
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}, |
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}; |
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DECLARE_ACPI_CROS_LAPTOP(samus); |
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|
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static struct acpi_peripheral generic_atmel_peripherals[] __initdata = { |
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/* Touchpad */ |
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{ |
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.hid = "ATML0000", |
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.properties = chromebook_pixel_trackpad_props, |
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}, |
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/* Touchsceen */ |
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{ |
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.hid = "ATML0001", |
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.properties = chromebook_atmel_touchscreen_props, |
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}, |
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}; |
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DECLARE_ACPI_CROS_LAPTOP(generic_atmel); |
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|
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static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = { |
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{ |
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.ident = "Samsung Series 5 550", |
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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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.driver_data = (void *)&samsung_series_5_550, |
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}, |
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{ |
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.ident = "Samsung Series 5", |
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.matches = { |
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DMI_MATCH(DMI_PRODUCT_NAME, "Alex"), |
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}, |
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.driver_data = (void *)&samsung_series_5, |
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}, |
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{ |
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.ident = "Chromebook Pixel", |
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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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.driver_data = (void *)&chromebook_pixel, |
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}, |
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{ |
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.ident = "Wolf", |
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.matches = { |
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DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"), |
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}, |
|
.driver_data = (void *)&dell_chromebook_11, |
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}, |
|
{ |
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.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_dev; |
|
struct i2c_board_info *info; |
|
int i; |
|
int error; |
|
|
|
if (!src->num_i2c_peripherals) |
|
return 0; |
|
|
|
cros_laptop->i2c_peripherals = kmemdup(src->i2c_peripherals, |
|
src->num_i2c_peripherals * |
|
sizeof(*src->i2c_peripherals), |
|
GFP_KERNEL); |
|
if (!cros_laptop->i2c_peripherals) |
|
return -ENOMEM; |
|
|
|
cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals; |
|
|
|
for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
|
i2c_dev = &cros_laptop->i2c_peripherals[i]; |
|
info = &i2c_dev->board_info; |
|
|
|
error = chromeos_laptop_setup_irq(i2c_dev); |
|
if (error) |
|
goto err_out; |
|
|
|
/* We need to deep-copy properties */ |
|
if (info->properties) { |
|
info->properties = |
|
property_entries_dup(info->properties); |
|
if (IS_ERR(info->properties)) { |
|
error = PTR_ERR(info->properties); |
|
goto err_out; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
err_out: |
|
while (--i >= 0) { |
|
i2c_dev = &cros_laptop->i2c_peripherals[i]; |
|
info = &i2c_dev->board_info; |
|
if (info->properties) |
|
property_entries_free(info->properties); |
|
} |
|
kfree(cros_laptop->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->properties) { |
|
acpi_dev->properties = |
|
property_entries_dup(src_dev->properties); |
|
if (IS_ERR(acpi_dev->properties)) { |
|
error = PTR_ERR(acpi_dev->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 (acpi_dev->properties) |
|
property_entries_free(acpi_dev->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; |
|
struct i2c_board_info *info; |
|
int i; |
|
|
|
for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
|
i2c_dev = &cros_laptop->i2c_peripherals[i]; |
|
info = &i2c_dev->board_info; |
|
|
|
i2c_unregister_device(i2c_dev->client); |
|
property_entries_free(info->properties); |
|
} |
|
|
|
for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) { |
|
acpi_dev = &cros_laptop->acpi_peripherals[i]; |
|
|
|
property_entries_free(acpi_dev->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 <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|