module_param(ir_debug, int, 0644);
MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
-#define dprintk(fmt, arg...) \
+#define i2cdprintk(fmt, arg...) \
if (ir_debug) { \
printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg); \
}
-/* ----------------------------------------------------------------------- */
+#define dprintk(fmt, arg...) \
+ if (ir_debug) { \
+ printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
+ }
+
+/**********************************************************
+ Polling structure used by em28xx IR's
+ **********************************************************/
+
+struct em28xx_ir_poll_result {
+ unsigned int toggle_bit:1;
+ unsigned int read_count:7;
+ u8 rc_address;
+ u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
+};
+
+struct em28xx_IR {
+ struct em28xx *dev;
+ struct input_dev *input;
+ struct ir_input_state ir;
+ char name[32];
+ char phys[32];
+
+ /* poll external decoder */
+ int polling;
+ struct delayed_work work;
+ unsigned int last_toggle:1;
+ unsigned int last_readcount;
+ unsigned int repeat_interval;
+
+ int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
+};
+
+/**********************************************************
+ I2C IR based get keycodes - should be used with ir-kbd-i2c
+ **********************************************************/
int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
/* poll IR chip */
if (1 != i2c_master_recv(&ir->c, &b, 1)) {
- dprintk("read error\n");
+ i2cdprintk("read error\n");
return -EIO;
}
down, while 0xff indicates that no button is hold
down. 0xfe sequences are sometimes interrupted by 0xFF */
- dprintk("key %02x\n", b);
+ i2cdprintk("key %02x\n", b);
if (b == 0xff)
return 0;
return 1;
}
-
int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
unsigned char buf[2];
((buf[0]&0x10)>>3) | /* 0000 0010 */
((buf[0]&0x20)>>5); /* 0000 0001 */
- dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",
+ i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",
code, buf[0]);
/* return key */
/* poll IR chip */
if (3 != i2c_master_recv(&ir->c, buf, 3)) {
- dprintk("read error\n");
+ i2cdprintk("read error\n");
return -EIO;
}
- dprintk("key %02x\n", buf[2]&0x3f);
+ i2cdprintk("key %02x\n", buf[2]&0x3f);
if (buf[0] != 0x00)
return 0;
return 1;
}
+/**********************************************************
+ Poll based get keycode functions
+ **********************************************************/
+
+/* This is for the em2860/em2880 */
+static int default_polling_getkey(struct em28xx_IR *ir,
+ struct em28xx_ir_poll_result *poll_result)
+{
+ struct em28xx *dev = ir->dev;
+ int rc;
+ u8 msg[3] = { 0, 0, 0 };
+
+ /* Read key toggle, brand, and key code
+ on registers 0x45, 0x46 and 0x47
+ */
+ rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
+ msg, sizeof(msg));
+ if (rc < 0)
+ return rc;
+
+ /* Infrared toggle (Reg 0x45[7]) */
+ poll_result->toggle_bit = (msg[0] >> 7);
+
+ /* Infrared read count (Reg 0x45[6:0] */
+ poll_result->read_count = (msg[0] & 0x7f);
+
+ /* Remote Control Address (Reg 0x46) */
+ poll_result->rc_address = msg[1];
+
+ /* Remote Control Data (Reg 0x47) */
+ poll_result->rc_data[0] = msg[2];
+
+ return 0;
+}
+
+static int em2874_polling_getkey(struct em28xx_IR *ir,
+ struct em28xx_ir_poll_result *poll_result)
+{
+ struct em28xx *dev = ir->dev;
+ int rc;
+ u8 msg[5] = { 0, 0, 0, 0, 0 };
+
+ /* Read key toggle, brand, and key code
+ on registers 0x51-55
+ */
+ rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
+ msg, sizeof(msg));
+ if (rc < 0)
+ return rc;
+
+ /* Infrared toggle (Reg 0x51[7]) */
+ poll_result->toggle_bit = (msg[0] >> 7);
+
+ /* Infrared read count (Reg 0x51[6:0] */
+ poll_result->read_count = (msg[0] & 0x7f);
+
+ /* Remote Control Address (Reg 0x52) */
+ poll_result->rc_address = msg[1];
+
+ /* Remote Control Data (Reg 0x53-55) */
+ poll_result->rc_data[0] = msg[2];
+ poll_result->rc_data[1] = msg[3];
+ poll_result->rc_data[2] = msg[4];
+
+ return 0;
+}
+
+/**********************************************************
+ Polling code for em28xx
+ **********************************************************/
+
+static void em28xx_ir_handle_key(struct em28xx_IR *ir)
+{
+ int result;
+ int do_sendkey = 0;
+ struct em28xx_ir_poll_result poll_result;
+
+ /* read the registers containing the IR status */
+ result = ir->get_key(ir, &poll_result);
+ if (result < 0) {
+ dprintk("ir->get_key() failed %d\n", result);
+ return;
+ }
+
+ dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x\n",
+ poll_result.toggle_bit, poll_result.read_count,
+ ir->last_readcount, poll_result.rc_data[0]);
+
+ if (ir->dev->chip_id == CHIP_ID_EM2874) {
+ /* The em2874 clears the readcount field every time the
+ register is read. The em2860/2880 datasheet says that it
+ is supposed to clear the readcount, but it doesn't. So with
+ the em2874, we are looking for a non-zero read count as
+ opposed to a readcount that is incrementing */
+ ir->last_readcount = 0;
+ }
+
+ if (poll_result.read_count == 0) {
+ /* The button has not been pressed since the last read */
+ } else if (ir->last_toggle != poll_result.toggle_bit) {
+ /* A button has been pressed */
+ dprintk("button has been pressed\n");
+ ir->last_toggle = poll_result.toggle_bit;
+ ir->repeat_interval = 0;
+ do_sendkey = 1;
+ } else if (poll_result.toggle_bit == ir->last_toggle &&
+ poll_result.read_count > 0 &&
+ poll_result.read_count != ir->last_readcount) {
+ /* The button is still being held down */
+ dprintk("button being held down\n");
+
+ /* Debouncer for first keypress */
+ if (ir->repeat_interval++ > 9) {
+ /* Start repeating after 1 second */
+ do_sendkey = 1;
+ }
+ }
+
+ if (do_sendkey) {
+ dprintk("sending keypress\n");
+ ir_input_keydown(ir->input, &ir->ir, poll_result.rc_data[0],
+ poll_result.rc_data[0]);
+ ir_input_nokey(ir->input, &ir->ir);
+ }
+
+ ir->last_readcount = poll_result.read_count;
+ return;
+}
+
+static void em28xx_ir_work(struct work_struct *work)
+{
+ struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
+
+ em28xx_ir_handle_key(ir);
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
+}
+
+static void em28xx_ir_start(struct em28xx_IR *ir)
+{
+ INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
+ schedule_delayed_work(&ir->work, 0);
+}
+
+static void em28xx_ir_stop(struct em28xx_IR *ir)
+{
+ cancel_delayed_work_sync(&ir->work);
+}
+
+int em28xx_ir_init(struct em28xx *dev)
+{
+ struct em28xx_IR *ir;
+ struct input_dev *input_dev;
+ u8 ir_config;
+ int err = -ENOMEM;
+
+ if (dev->board.ir_codes == NULL) {
+ /* No remote control support */
+ return 0;
+ }
+
+ ir = kzalloc(sizeof(*ir), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!ir || !input_dev)
+ goto err_out_free;
+
+ ir->input = input_dev;
+
+ /* Setup the proper handler based on the chip */
+ switch (dev->chip_id) {
+ case CHIP_ID_EM2860:
+ case CHIP_ID_EM2883:
+ ir->get_key = default_polling_getkey;
+ break;
+ case CHIP_ID_EM2874:
+ ir->get_key = em2874_polling_getkey;
+ /* For now we only support RC5, so enable it */
+ ir_config = EM2874_IR_RC5;
+ em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
+ break;
+ default:
+ printk("Unrecognized em28xx chip id: IR not supported\n");
+ goto err_out_free;
+ }
+
+ /* This is how often we ask the chip for IR information */
+ ir->polling = 100; /* ms */
+
+ /* init input device */
+ snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
+ dev->name);
+
+ usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
+ strlcat(ir->phys, "/input0", sizeof(ir->phys));
+
+ ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER, dev->board.ir_codes);
+ input_dev->name = ir->name;
+ input_dev->phys = ir->phys;
+ input_dev->id.bustype = BUS_USB;
+ input_dev->id.version = 1;
+ input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
+ input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
+
+ input_dev->dev.parent = &dev->udev->dev;
+ /* record handles to ourself */
+ ir->dev = dev;
+ dev->ir = ir;
+
+ em28xx_ir_start(ir);
+
+ /* all done */
+ err = input_register_device(ir->input);
+ if (err)
+ goto err_out_stop;
+
+ return 0;
+ err_out_stop:
+ em28xx_ir_stop(ir);
+ dev->ir = NULL;
+ err_out_free:
+ input_free_device(input_dev);
+ kfree(ir);
+ return err;
+}
+
+int em28xx_ir_fini(struct em28xx *dev)
+{
+ struct em28xx_IR *ir = dev->ir;
+
+ /* skip detach on non attached boards */
+ if (!ir)
+ return 0;
+
+ em28xx_ir_stop(ir);
+ input_unregister_device(ir->input);
+ kfree(ir);
+
+ /* done */
+ dev->ir = NULL;
+ return 0;
+}
+
+/**********************************************************
+ Handle Webcam snapshot button
+ **********************************************************/
+
static void em28xx_query_sbutton(struct work_struct *work)
{
/* Poll the register and see if the button is depressed */
}
return;
}
-
-/* ----------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
projects / linux-2.6-omap-h63xx.git / blobdiff