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@@ -34,6 +34,7 @@
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#include <linux/kernel.h>
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#include <linux/hid.h>
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#include <linux/mutex.h>
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#include <linux/acpi.h>
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#include <linux/i2c/i2c-hid.h>
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@@ -139,6 +140,8 @@ struct i2c_hid {
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unsigned long flags; /* device flags */
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wait_queue_head_t wait; /* For waiting the interrupt */
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struct i2c_hid_platform_data pdata;
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};
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static int __i2c_hid_command(struct i2c_client *client,
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@@ -742,7 +745,7 @@ static struct hid_ll_driver i2c_hid_ll_driver = {
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.hidinput_input_event = i2c_hid_hidinput_input_event,
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};
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static int __devinit i2c_hid_init_irq(struct i2c_client *client)
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static int i2c_hid_init_irq(struct i2c_client *client)
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{
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struct i2c_hid *ihid = i2c_get_clientdata(client);
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int ret;
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@@ -764,7 +767,7 @@ static int __devinit i2c_hid_init_irq(struct i2c_client *client)
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return 0;
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}
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static int __devinit i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
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static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
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{
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struct i2c_client *client = ihid->client;
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struct i2c_hid_desc *hdesc = &ihid->hdesc;
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@@ -821,8 +824,72 @@ static int __devinit i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
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return 0;
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}
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static int __devinit i2c_hid_probe(struct i2c_client *client,
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const struct i2c_device_id *dev_id)
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#ifdef CONFIG_ACPI
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static int i2c_hid_acpi_pdata(struct i2c_client *client,
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struct i2c_hid_platform_data *pdata)
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{
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static u8 i2c_hid_guid[] = {
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0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
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0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
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};
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object params[4], *obj;
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struct acpi_object_list input;
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struct acpi_device *adev;
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acpi_handle handle;
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handle = ACPI_HANDLE(&client->dev);
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if (!handle || acpi_bus_get_device(handle, &adev))
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return -ENODEV;
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input.count = ARRAY_SIZE(params);
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input.pointer = params;
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params[0].type = ACPI_TYPE_BUFFER;
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params[0].buffer.length = sizeof(i2c_hid_guid);
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params[0].buffer.pointer = i2c_hid_guid;
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params[1].type = ACPI_TYPE_INTEGER;
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params[1].integer.value = 1;
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params[2].type = ACPI_TYPE_INTEGER;
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params[2].integer.value = 1; /* HID function */
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params[3].type = ACPI_TYPE_INTEGER;
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params[3].integer.value = 0;
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if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DSM", &input, &buf))) {
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dev_err(&client->dev, "device _DSM execution failed\n");
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return -ENODEV;
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}
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obj = (union acpi_object *)buf.pointer;
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if (obj->type != ACPI_TYPE_INTEGER) {
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dev_err(&client->dev, "device _DSM returned invalid type: %d\n",
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obj->type);
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kfree(buf.pointer);
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return -EINVAL;
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}
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pdata->hid_descriptor_address = obj->integer.value;
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kfree(buf.pointer);
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return 0;
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}
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static const struct acpi_device_id i2c_hid_acpi_match[] = {
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{"ACPI0C50", 0 },
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{"PNP0C50", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
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#else
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static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
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struct i2c_hid_platform_data *pdata)
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{
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return -ENODEV;
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}
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#endif
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static int i2c_hid_probe(struct i2c_client *client,
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const struct i2c_device_id *dev_id)
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{
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int ret;
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struct i2c_hid *ihid;
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@@ -832,11 +899,6 @@ static int __devinit i2c_hid_probe(struct i2c_client *client,
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dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
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if (!platform_data) {
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dev_err(&client->dev, "HID register address not provided\n");
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return -EINVAL;
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}
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if (!client->irq) {
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dev_err(&client->dev,
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"HID over i2c has not been provided an Int IRQ\n");
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@@ -847,11 +909,22 @@ static int __devinit i2c_hid_probe(struct i2c_client *client,
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if (!ihid)
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return -ENOMEM;
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if (!platform_data) {
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ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
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if (ret) {
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dev_err(&client->dev,
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"HID register address not provided\n");
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goto err;
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}
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} else {
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ihid->pdata = *platform_data;
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}
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i2c_set_clientdata(client, ihid);
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ihid->client = client;
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hidRegister = platform_data->hid_descriptor_address;
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hidRegister = ihid->pdata.hid_descriptor_address;
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ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
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init_waitqueue_head(&ihid->wait);
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@@ -884,6 +957,7 @@ static int __devinit i2c_hid_probe(struct i2c_client *client,
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hid->hid_get_raw_report = i2c_hid_get_raw_report;
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hid->hid_output_raw_report = i2c_hid_output_raw_report;
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hid->dev.parent = &client->dev;
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ACPI_HANDLE_SET(&hid->dev, ACPI_HANDLE(&client->dev));
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hid->bus = BUS_I2C;
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hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
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hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
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@@ -913,7 +987,7 @@ err:
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return ret;
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}
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static int __devexit i2c_hid_remove(struct i2c_client *client)
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static int i2c_hid_remove(struct i2c_client *client)
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{
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struct i2c_hid *ihid = i2c_get_clientdata(client);
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struct hid_device *hid;
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@@ -975,10 +1049,11 @@ static struct i2c_driver i2c_hid_driver = {
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.name = "i2c_hid",
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.owner = THIS_MODULE,
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.pm = &i2c_hid_pm,
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.acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
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},
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.probe = i2c_hid_probe,
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.remove = __devexit_p(i2c_hid_remove),
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.remove = i2c_hid_remove,
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.id_table = i2c_hid_id_table,
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};
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