#include <linux/kernel.h>
#include <linux/hid.h>
#include <linux/mutex.h>
+#include <linux/acpi.h>
#include <linux/i2c/i2c-hid.h>
unsigned long flags; /* device flags */
wait_queue_head_t wait; /* For waiting the interrupt */
+
+ struct i2c_hid_platform_data pdata;
};
static int __i2c_hid_command(struct i2c_client *client,
return 0;
}
+#ifdef CONFIG_ACPI
+static int i2c_hid_acpi_pdata(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ static u8 i2c_hid_guid[] = {
+ 0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
+ 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
+ };
+ struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object params[4], *obj;
+ struct acpi_object_list input;
+ struct acpi_device *adev;
+ acpi_handle handle;
+
+ handle = ACPI_HANDLE(&client->dev);
+ if (!handle || acpi_bus_get_device(handle, &adev))
+ return -ENODEV;
+
+ input.count = ARRAY_SIZE(params);
+ input.pointer = params;
+
+ params[0].type = ACPI_TYPE_BUFFER;
+ params[0].buffer.length = sizeof(i2c_hid_guid);
+ params[0].buffer.pointer = i2c_hid_guid;
+ params[1].type = ACPI_TYPE_INTEGER;
+ params[1].integer.value = 1;
+ params[2].type = ACPI_TYPE_INTEGER;
+ params[2].integer.value = 1; /* HID function */
+ params[3].type = ACPI_TYPE_INTEGER;
+ params[3].integer.value = 0;
+
+ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DSM", &input, &buf))) {
+ dev_err(&client->dev, "device _DSM execution failed\n");
+ return -ENODEV;
+ }
+
+ obj = (union acpi_object *)buf.pointer;
+ if (obj->type != ACPI_TYPE_INTEGER) {
+ dev_err(&client->dev, "device _DSM returned invalid type: %d\n",
+ obj->type);
+ kfree(buf.pointer);
+ return -EINVAL;
+ }
+
+ pdata->hid_descriptor_address = obj->integer.value;
+
+ kfree(buf.pointer);
+ return 0;
+}
+
+static const struct acpi_device_id i2c_hid_acpi_match[] = {
+ {"ACPI0C50", 0 },
+ {"PNP0C50", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
+#else
+static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ return -ENODEV;
+}
+#endif
+
static int i2c_hid_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
- if (!platform_data) {
- dev_err(&client->dev, "HID register address not provided\n");
- return -EINVAL;
- }
-
if (!client->irq) {
dev_err(&client->dev,
"HID over i2c has not been provided an Int IRQ\n");
if (!ihid)
return -ENOMEM;
+ if (!platform_data) {
+ ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
+ if (ret) {
+ dev_err(&client->dev,
+ "HID register address not provided\n");
+ goto err;
+ }
+ } else {
+ ihid->pdata = *platform_data;
+ }
+
i2c_set_clientdata(client, ihid);
ihid->client = client;
- hidRegister = platform_data->hid_descriptor_address;
+ hidRegister = ihid->pdata.hid_descriptor_address;
ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
init_waitqueue_head(&ihid->wait);
hid->hid_get_raw_report = i2c_hid_get_raw_report;
hid->hid_output_raw_report = i2c_hid_output_raw_report;
hid->dev.parent = &client->dev;
+ ACPI_HANDLE_SET(&hid->dev, ACPI_HANDLE(&client->dev));
hid->bus = BUS_I2C;
hid->version = le16_to_cpu(ihid->hdesc.bcdVersion);
hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
.name = "i2c_hid",
.owner = THIS_MODULE,
.pm = &i2c_hid_pm,
+ .acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
},
.probe = i2c_hid_probe,
*/
#include <linux/atomic.h>
+#include <linux/compat.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/hid.h>
.parse = uhid_hid_parse,
};
+#ifdef CONFIG_COMPAT
+
+/* Apparently we haven't stepped on these rakes enough times yet. */
+struct uhid_create_req_compat {
+ __u8 name[128];
+ __u8 phys[64];
+ __u8 uniq[64];
+
+ compat_uptr_t rd_data;
+ __u16 rd_size;
+
+ __u16 bus;
+ __u32 vendor;
+ __u32 product;
+ __u32 version;
+ __u32 country;
+} __attribute__((__packed__));
+
+static int uhid_event_from_user(const char __user *buffer, size_t len,
+ struct uhid_event *event)
+{
+ if (is_compat_task()) {
+ u32 type;
+
+ if (get_user(type, buffer))
+ return -EFAULT;
+
+ if (type == UHID_CREATE) {
+ /*
+ * This is our messed up request with compat pointer.
+ * It is largish (more than 256 bytes) so we better
+ * allocate it from the heap.
+ */
+ struct uhid_create_req_compat *compat;
+
+ compat = kmalloc(sizeof(*compat), GFP_KERNEL);
+ if (!compat)
+ return -ENOMEM;
+
+ buffer += sizeof(type);
+ len -= sizeof(type);
+ if (copy_from_user(compat, buffer,
+ min(len, sizeof(*compat)))) {
+ kfree(compat);
+ return -EFAULT;
+ }
+
+ /* Shuffle the data over to proper structure */
+ event->type = type;
+
+ memcpy(event->u.create.name, compat->name,
+ sizeof(compat->name));
+ memcpy(event->u.create.phys, compat->phys,
+ sizeof(compat->phys));
+ memcpy(event->u.create.uniq, compat->uniq,
+ sizeof(compat->uniq));
+
+ event->u.create.rd_data = compat_ptr(compat->rd_data);
+ event->u.create.rd_size = compat->rd_size;
+
+ event->u.create.bus = compat->bus;
+ event->u.create.vendor = compat->vendor;
+ event->u.create.product = compat->product;
+ event->u.create.version = compat->version;
+ event->u.create.country = compat->country;
+
+ kfree(compat);
+ return 0;
+ }
+ /* All others can be copied directly */
+ }
+
+ if (copy_from_user(event, buffer, min(len, sizeof(*event))))
+ return -EFAULT;
+
+ return 0;
+}
+#else
+static int uhid_event_from_user(const char __user *buffer, size_t len,
+ struct uhid_event *event)
+{
+ if (copy_from_user(event, buffer, min(len, sizeof(*event))))
+ return -EFAULT;
+
+ return 0;
+}
+#endif
+
static int uhid_dev_create(struct uhid_device *uhid,
const struct uhid_event *ev)
{
memset(&uhid->input_buf, 0, sizeof(uhid->input_buf));
len = min(count, sizeof(uhid->input_buf));
- if (copy_from_user(&uhid->input_buf, buffer, len)) {
- ret = -EFAULT;
+
+ ret = uhid_event_from_user(buffer, len, &uhid->input_buf);
+ if (ret)
goto unlock;
- }
switch (uhid->input_buf.type) {
case UHID_CREATE:
projects / linux-2.6-block.git / commitdiff