diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-input.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-input.c | 311 |
1 files changed, 297 insertions, 14 deletions
diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c index eab3d9511af3..42bbaf64aceb 100644 --- a/drivers/media/video/em28xx/em28xx-input.c +++ b/drivers/media/video/em28xx/em28xx-input.c @@ -38,12 +38,48 @@ static unsigned int ir_debug; 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 work_struct work; + struct timer_list timer; + 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) { @@ -51,7 +87,7 @@ 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; } @@ -59,7 +95,7 @@ int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) 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; @@ -73,7 +109,6 @@ int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) return 1; } - int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) { unsigned char buf[2]; @@ -97,7 +132,7 @@ int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) ((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 */ @@ -114,11 +149,11 @@ int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_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; @@ -128,6 +163,260 @@ int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key, 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 ir_timer(unsigned long data) +{ + struct em28xx_IR *ir = (struct em28xx_IR *)data; + + schedule_work(&ir->work); +} + +static void em28xx_ir_work(struct work_struct *work) +{ + struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work); + + em28xx_ir_handle_key(ir); + mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); +} + +void em28xx_ir_start(struct em28xx_IR *ir) +{ + setup_timer(&ir->timer, ir_timer, (unsigned long)ir); + INIT_WORK(&ir->work, em28xx_ir_work); + schedule_work(&ir->work); +} + +static void em28xx_ir_stop(struct em28xx_IR *ir) +{ + del_timer_sync(&ir->timer); + flush_scheduled_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 */ @@ -210,9 +499,3 @@ void em28xx_deregister_snapshot_button(struct em28xx *dev) } return; } - -/* ---------------------------------------------------------------------- - * Local variables: - * c-basic-offset: 8 - * End: - */ |