diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-input.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-input.c | 966 |
1 files changed, 966 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-input.c b/drivers/media/usb/em28xx/em28xx-input.c new file mode 100644 index 000000000..92007a225 --- /dev/null +++ b/drivers/media/usb/em28xx/em28xx-input.c @@ -0,0 +1,966 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// handle em28xx IR remotes via linux kernel input layer. +// +// Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> +// Markus Rechberger <mrechberger@gmail.com> +// Mauro Carvalho Chehab <mchehab@kernel.org> +// Sascha Sommer <saschasommer@freenet.de> +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +#include "em28xx.h" + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/usb.h> +#include <linux/slab.h> +#include <linux/bitrev.h> + +#define EM28XX_SNAPSHOT_KEY KEY_CAMERA +#define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */ +#define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */ + +static unsigned int ir_debug; +module_param(ir_debug, int, 0644); +MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); + +#define MODULE_NAME "em28xx" + +#define dprintk(fmt, arg...) do { \ + if (ir_debug) \ + dev_printk(KERN_DEBUG, &ir->dev->intf->dev, \ + "input: %s: " fmt, __func__, ## arg); \ +} while (0) + +/* + * Polling structure used by em28xx IR's + */ + +struct em28xx_ir_poll_result { + unsigned int toggle_bit:1; + unsigned int read_count:7; + + enum rc_proto protocol; + u32 scancode; +}; + +struct em28xx_IR { + struct em28xx *dev; + struct rc_dev *rc; + char name[32]; + char phys[32]; + + /* poll decoder */ + int polling; + struct delayed_work work; + unsigned int full_code:1; + unsigned int last_readcount; + u64 rc_proto; + + struct i2c_client *i2c_client; + + int (*get_key_i2c)(struct i2c_client *ir, enum rc_proto *protocol, + u32 *scancode); + int (*get_key)(struct em28xx_IR *ir, struct em28xx_ir_poll_result *r); +}; + +/* + * I2C IR based get keycodes - should be used with ir-kbd-i2c + */ + +static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, + enum rc_proto *protocol, u32 *scancode) +{ + int rc; + unsigned char b; + + /* poll IR chip */ + rc = i2c_master_recv(i2c_dev, &b, 1); + if (rc != 1) { + if (rc < 0) + return rc; + return -EIO; + } + + /* + * it seems that 0xFE indicates that a button is still hold + * down, while 0xff indicates that no button is hold down. + */ + + if (b == 0xff) + return 0; + + if (b == 0xfe) + /* keep old data */ + return 1; + + *protocol = RC_PROTO_UNKNOWN; + *scancode = b; + return 1; +} + +static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, + enum rc_proto *protocol, u32 *scancode) +{ + unsigned char buf[2]; + int size; + + /* poll IR chip */ + size = i2c_master_recv(i2c_dev, buf, sizeof(buf)); + + if (size != 2) + return -EIO; + + /* Does eliminate repeated parity code */ + if (buf[1] == 0xff) + return 0; + + /* + * Rearranges bits to the right order. + * The bit order were determined experimentally by using + * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 + * The RC5 code has 14 bits, but we've experimentally determined + * the meaning for only 11 bits. + * So, the code translation is not complete. Yet, it is enough to + * work with the provided RC5 IR. + */ + *protocol = RC_PROTO_RC5; + *scancode = (bitrev8(buf[1]) & 0x1f) << 8 | bitrev8(buf[0]) >> 2; + return 1; +} + +static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev, + enum rc_proto *protocol, + u32 *scancode) +{ + unsigned char buf[3]; + + /* poll IR chip */ + + if (i2c_master_recv(i2c_dev, buf, 3) != 3) + return -EIO; + + if (buf[0] != 0x00) + return 0; + + *protocol = RC_PROTO_UNKNOWN; + *scancode = buf[2] & 0x3f; + return 1; +} + +static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev, + enum rc_proto *protocol, + u32 *scancode) +{ + unsigned char subaddr, keydetect, key; + + struct i2c_msg msg[] = { + { + .addr = i2c_dev->addr, + .flags = 0, + .buf = &subaddr, .len = 1 + }, { + .addr = i2c_dev->addr, + .flags = I2C_M_RD, + .buf = &keydetect, + .len = 1 + } + }; + + subaddr = 0x10; + if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2) + return -EIO; + if (keydetect == 0x00) + return 0; + + subaddr = 0x00; + msg[1].buf = &key; + if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2) + return -EIO; + if (key == 0x00) + return 0; + + *protocol = RC_PROTO_UNKNOWN; + *scancode = 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/Data (Regs 0x46/0x47) */ + switch (ir->rc_proto) { + case RC_PROTO_BIT_RC5: + poll_result->protocol = RC_PROTO_RC5; + poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); + break; + + case RC_PROTO_BIT_NEC: + poll_result->protocol = RC_PROTO_NEC; + poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]); + break; + + default: + poll_result->protocol = RC_PROTO_UNKNOWN; + poll_result->scancode = msg[1] << 8 | msg[2]; + break; + } + + 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) + * Remote Control Data (Reg 0x53-0x55) + */ + switch (ir->rc_proto) { + case RC_PROTO_BIT_RC5: + poll_result->protocol = RC_PROTO_RC5; + poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); + break; + + case RC_PROTO_BIT_NEC: + poll_result->scancode = msg[1] << 8 | msg[2]; + if ((msg[3] ^ msg[4]) != 0xff) { /* 32 bits NEC */ + poll_result->protocol = RC_PROTO_NEC32; + poll_result->scancode = RC_SCANCODE_NEC32((msg[1] << 24) | + (msg[2] << 16) | + (msg[3] << 8) | + (msg[4])); + } else if ((msg[1] ^ msg[2]) != 0xff) { /* 24 bits NEC */ + poll_result->protocol = RC_PROTO_NECX; + poll_result->scancode = RC_SCANCODE_NECX(msg[1] << 8 | + msg[2], msg[3]); + } else { /* Normal NEC */ + poll_result->protocol = RC_PROTO_NEC; + poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[3]); + } + break; + + case RC_PROTO_BIT_RC6_0: + poll_result->protocol = RC_PROTO_RC6_0; + poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]); + break; + + default: + poll_result->protocol = RC_PROTO_UNKNOWN; + poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) | + (msg[3] << 8) | msg[4]; + break; + } + + return 0; +} + +/* + * Polling code for em28xx + */ + +static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) +{ + static u32 scancode; + enum rc_proto protocol; + int rc; + + rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode); + if (rc < 0) { + dprintk("ir->get_key_i2c() failed: %d\n", rc); + return rc; + } + + if (rc) { + dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n", + __func__, protocol, scancode); + rc_keydown(ir->rc, protocol, scancode, 0); + } + return 0; +} + +static void em28xx_ir_handle_key(struct em28xx_IR *ir) +{ + int result; + struct em28xx_ir_poll_result poll_result; + + /* read the registers containing the IR status */ + result = ir->get_key(ir, &poll_result); + if (unlikely(result < 0)) { + dprintk("ir->get_key() failed: %d\n", result); + return; + } + + if (unlikely(poll_result.read_count != ir->last_readcount)) { + dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__, + poll_result.toggle_bit, poll_result.read_count, + poll_result.scancode); + if (ir->full_code) + rc_keydown(ir->rc, + poll_result.protocol, + poll_result.scancode, + poll_result.toggle_bit); + else + rc_keydown(ir->rc, + RC_PROTO_UNKNOWN, + poll_result.scancode & 0xff, + poll_result.toggle_bit); + + if (ir->dev->chip_id == CHIP_ID_EM2874 || + ir->dev->chip_id == CHIP_ID_EM2884) + /* + * 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; + else + ir->last_readcount = poll_result.read_count; + } +} + +static void em28xx_ir_work(struct work_struct *work) +{ + struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); + + if (ir->i2c_client) /* external i2c device */ + em28xx_i2c_ir_handle_key(ir); + else /* internal device */ + em28xx_ir_handle_key(ir); + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); +} + +static int em28xx_ir_start(struct rc_dev *rc) +{ + struct em28xx_IR *ir = rc->priv; + + INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); + schedule_delayed_work(&ir->work, 0); + + return 0; +} + +static void em28xx_ir_stop(struct rc_dev *rc) +{ + struct em28xx_IR *ir = rc->priv; + + cancel_delayed_work_sync(&ir->work); +} + +static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) +{ + struct em28xx_IR *ir = rc_dev->priv; + struct em28xx *dev = ir->dev; + + /* Adjust xclk based on IR table for RC5/NEC tables */ + if (*rc_proto & RC_PROTO_BIT_RC5) { + dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; + ir->full_code = 1; + *rc_proto = RC_PROTO_BIT_RC5; + } else if (*rc_proto & RC_PROTO_BIT_NEC) { + dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; + ir->full_code = 1; + *rc_proto = RC_PROTO_BIT_NEC; + } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { + *rc_proto = RC_PROTO_BIT_UNKNOWN; + } else { + *rc_proto = ir->rc_proto; + return -EINVAL; + } + em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, + EM28XX_XCLK_IR_RC5_MODE); + + ir->rc_proto = *rc_proto; + + return 0; +} + +static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) +{ + struct em28xx_IR *ir = rc_dev->priv; + struct em28xx *dev = ir->dev; + u8 ir_config = EM2874_IR_RC5; + + /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */ + if (*rc_proto & RC_PROTO_BIT_RC5) { + dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; + ir->full_code = 1; + *rc_proto = RC_PROTO_BIT_RC5; + } else if (*rc_proto & RC_PROTO_BIT_NEC) { + dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; + ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY; + ir->full_code = 1; + *rc_proto = RC_PROTO_BIT_NEC; + } else if (*rc_proto & RC_PROTO_BIT_RC6_0) { + dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; + ir_config = EM2874_IR_RC6_MODE_0; + ir->full_code = 1; + *rc_proto = RC_PROTO_BIT_RC6_0; + } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { + *rc_proto = RC_PROTO_BIT_UNKNOWN; + } else { + *rc_proto = ir->rc_proto; + return -EINVAL; + } + em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1); + em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, + EM28XX_XCLK_IR_RC5_MODE); + + ir->rc_proto = *rc_proto; + + return 0; +} + +static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) +{ + struct em28xx_IR *ir = rc_dev->priv; + struct em28xx *dev = ir->dev; + + /* Setup the proper handler based on the chip */ + switch (dev->chip_id) { + case CHIP_ID_EM2860: + case CHIP_ID_EM2883: + return em2860_ir_change_protocol(rc_dev, rc_proto); + case CHIP_ID_EM2884: + case CHIP_ID_EM2874: + case CHIP_ID_EM28174: + case CHIP_ID_EM28178: + return em2874_ir_change_protocol(rc_dev, rc_proto); + default: + dev_err(&ir->dev->intf->dev, + "Unrecognized em28xx chip id 0x%02x: IR not supported\n", + dev->chip_id); + return -EINVAL; + } +} + +static int em28xx_probe_i2c_ir(struct em28xx *dev) +{ + int i = 0; + /* + * Leadtek winfast tv USBII deluxe can find a non working IR-device + * at address 0x18, so if that address is needed for another board in + * the future, please put it after 0x1f. + */ + const unsigned short addr_list[] = { + 0x1f, 0x30, 0x47, I2C_CLIENT_END + }; + + while (addr_list[i] != I2C_CLIENT_END) { + if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], + addr_list[i]) == 1) + return addr_list[i]; + i++; + } + + return -ENODEV; +} + +/* + * Handle buttons + */ + +static void em28xx_query_buttons(struct work_struct *work) +{ + struct em28xx *dev = + container_of(work, struct em28xx, buttons_query_work.work); + u8 i, j; + int regval; + bool is_pressed, was_pressed; + const struct em28xx_led *led; + + /* Poll and evaluate all addresses */ + for (i = 0; i < dev->num_button_polling_addresses; i++) { + /* Read value from register */ + regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]); + if (regval < 0) + continue; + /* Check states of the buttons and act */ + j = 0; + while (dev->board.buttons[j].role >= 0 && + dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) { + const struct em28xx_button *button; + + button = &dev->board.buttons[j]; + + /* Check if button uses the current address */ + if (button->reg_r != dev->button_polling_addresses[i]) { + j++; + continue; + } + /* Determine if button is and was pressed last time */ + is_pressed = regval & button->mask; + was_pressed = dev->button_polling_last_values[i] + & button->mask; + if (button->inverted) { + is_pressed = !is_pressed; + was_pressed = !was_pressed; + } + /* Clear button state (if needed) */ + if (is_pressed && button->reg_clearing) + em28xx_write_reg(dev, button->reg_clearing, + (~regval & button->mask) + | (regval & ~button->mask)); + /* Handle button state */ + if (!is_pressed || was_pressed) { + j++; + continue; + } + switch (button->role) { + case EM28XX_BUTTON_SNAPSHOT: + /* Emulate the keypress */ + input_report_key(dev->sbutton_input_dev, + EM28XX_SNAPSHOT_KEY, 1); + /* Unpress the key */ + input_report_key(dev->sbutton_input_dev, + EM28XX_SNAPSHOT_KEY, 0); + break; + case EM28XX_BUTTON_ILLUMINATION: + led = em28xx_find_led(dev, + EM28XX_LED_ILLUMINATION); + /* Switch illumination LED on/off */ + if (led) + em28xx_toggle_reg_bits(dev, + led->gpio_reg, + led->gpio_mask); + break; + default: + WARN_ONCE(1, "BUG: unhandled button role."); + } + /* Next button */ + j++; + } + /* Save current value for comparison during the next polling */ + dev->button_polling_last_values[i] = regval; + } + /* Schedule next poll */ + schedule_delayed_work(&dev->buttons_query_work, + msecs_to_jiffies(dev->button_polling_interval)); +} + +static int em28xx_register_snapshot_button(struct em28xx *dev) +{ + struct usb_device *udev = interface_to_usbdev(dev->intf); + struct input_dev *input_dev; + int err; + + dev_info(&dev->intf->dev, "Registering snapshot button...\n"); + input_dev = input_allocate_device(); + if (!input_dev) + return -ENOMEM; + + usb_make_path(udev, dev->snapshot_button_path, + sizeof(dev->snapshot_button_path)); + strlcat(dev->snapshot_button_path, "/sbutton", + sizeof(dev->snapshot_button_path)); + + input_dev->name = "em28xx snapshot button"; + input_dev->phys = dev->snapshot_button_path; + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); + set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); + input_dev->keycodesize = 0; + input_dev->keycodemax = 0; + input_dev->id.bustype = BUS_USB; + input_dev->id.vendor = le16_to_cpu(udev->descriptor.idVendor); + input_dev->id.product = le16_to_cpu(udev->descriptor.idProduct); + input_dev->id.version = 1; + input_dev->dev.parent = &dev->intf->dev; + + err = input_register_device(input_dev); + if (err) { + dev_err(&dev->intf->dev, "input_register_device failed\n"); + input_free_device(input_dev); + return err; + } + + dev->sbutton_input_dev = input_dev; + return 0; +} + +static void em28xx_init_buttons(struct em28xx *dev) +{ + u8 i = 0, j = 0; + bool addr_new = false; + + dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL; + while (dev->board.buttons[i].role >= 0 && + dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) { + const struct em28xx_button *button = &dev->board.buttons[i]; + + /* Check if polling address is already on the list */ + addr_new = true; + for (j = 0; j < dev->num_button_polling_addresses; j++) { + if (button->reg_r == dev->button_polling_addresses[j]) { + addr_new = false; + break; + } + } + /* Check if max. number of polling addresses is exceeded */ + if (addr_new && dev->num_button_polling_addresses + >= EM28XX_NUM_BUTTON_ADDRESSES_MAX) { + WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded."); + goto next_button; + } + /* Button role specific checks and actions */ + if (button->role == EM28XX_BUTTON_SNAPSHOT) { + /* Register input device */ + if (em28xx_register_snapshot_button(dev) < 0) + goto next_button; + } else if (button->role == EM28XX_BUTTON_ILLUMINATION) { + /* Check sanity */ + if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) { + dev_err(&dev->intf->dev, + "BUG: illumination button defined, but no illumination LED.\n"); + goto next_button; + } + } + /* Add read address to list of polling addresses */ + if (addr_new) { + unsigned int index = dev->num_button_polling_addresses; + + dev->button_polling_addresses[index] = button->reg_r; + dev->num_button_polling_addresses++; + } + /* Reduce polling interval if necessary */ + if (!button->reg_clearing) + dev->button_polling_interval = + EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL; +next_button: + /* Next button */ + i++; + } + + /* Start polling */ + if (dev->num_button_polling_addresses) { + memset(dev->button_polling_last_values, 0, + EM28XX_NUM_BUTTON_ADDRESSES_MAX); + schedule_delayed_work(&dev->buttons_query_work, + msecs_to_jiffies(dev->button_polling_interval)); + } +} + +static void em28xx_shutdown_buttons(struct em28xx *dev) +{ + /* Cancel polling */ + cancel_delayed_work_sync(&dev->buttons_query_work); + /* Clear polling addresses list */ + dev->num_button_polling_addresses = 0; + /* Deregister input devices */ + if (dev->sbutton_input_dev) { + dev_info(&dev->intf->dev, "Deregistering snapshot button\n"); + input_unregister_device(dev->sbutton_input_dev); + dev->sbutton_input_dev = NULL; + } +} + +static int em28xx_ir_init(struct em28xx *dev) +{ + struct usb_device *udev = interface_to_usbdev(dev->intf); + struct em28xx_IR *ir; + struct rc_dev *rc; + int err = -ENOMEM; + u64 rc_proto; + u16 i2c_rc_dev_addr = 0; + + if (dev->is_audio_only) { + /* Shouldn't initialize IR for this interface */ + return 0; + } + + kref_get(&dev->ref); + INIT_DELAYED_WORK(&dev->buttons_query_work, em28xx_query_buttons); + + if (dev->board.buttons) + em28xx_init_buttons(dev); + + if (dev->board.has_ir_i2c) { + i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev); + if (!i2c_rc_dev_addr) { + dev->board.has_ir_i2c = 0; + dev_warn(&dev->intf->dev, + "No i2c IR remote control device found.\n"); + err = -ENODEV; + goto ref_put; + } + } + + if (!dev->board.ir_codes && !dev->board.has_ir_i2c) { + /* No remote control support */ + dev_warn(&dev->intf->dev, + "Remote control support is not available for this card.\n"); + return 0; + } + + dev_info(&dev->intf->dev, "Registering input extension\n"); + + ir = kzalloc(sizeof(*ir), GFP_KERNEL); + if (!ir) + goto ref_put; + rc = rc_allocate_device(RC_DRIVER_SCANCODE); + if (!rc) + goto error; + + /* record handles to ourself */ + ir->dev = dev; + dev->ir = ir; + ir->rc = rc; + + rc->priv = ir; + rc->open = em28xx_ir_start; + rc->close = em28xx_ir_stop; + + if (dev->board.has_ir_i2c) { /* external i2c device */ + switch (dev->model) { + case EM2800_BOARD_TERRATEC_CINERGY_200: + case EM2820_BOARD_TERRATEC_CINERGY_250: + rc->map_name = RC_MAP_EM_TERRATEC; + ir->get_key_i2c = em28xx_get_key_terratec; + break; + case EM2820_BOARD_PINNACLE_USB_2: + rc->map_name = RC_MAP_PINNACLE_GREY; + ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey; + break; + case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: + rc->map_name = RC_MAP_HAUPPAUGE; + ir->get_key_i2c = em28xx_get_key_em_haup; + rc->allowed_protocols = RC_PROTO_BIT_RC5; + break; + case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: + rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; + ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe; + break; + default: + err = -ENODEV; + goto error; + } + + ir->i2c_client = kzalloc(sizeof(*ir->i2c_client), GFP_KERNEL); + if (!ir->i2c_client) + goto error; + ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; + ir->i2c_client->addr = i2c_rc_dev_addr; + ir->i2c_client->flags = 0; + /* NOTE: all other fields of i2c_client are unused */ + } else { /* internal device */ + switch (dev->chip_id) { + case CHIP_ID_EM2860: + case CHIP_ID_EM2883: + rc->allowed_protocols = RC_PROTO_BIT_RC5 | + RC_PROTO_BIT_NEC; + ir->get_key = default_polling_getkey; + break; + case CHIP_ID_EM2884: + case CHIP_ID_EM2874: + case CHIP_ID_EM28174: + case CHIP_ID_EM28178: + ir->get_key = em2874_polling_getkey; + rc->allowed_protocols = RC_PROTO_BIT_RC5 | + RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | + RC_PROTO_BIT_NEC32 | RC_PROTO_BIT_RC6_0; + break; + default: + err = -ENODEV; + goto error; + } + + rc->change_protocol = em28xx_ir_change_protocol; + rc->map_name = dev->board.ir_codes; + + /* By default, keep protocol field untouched */ + rc_proto = RC_PROTO_BIT_UNKNOWN; + err = em28xx_ir_change_protocol(rc, &rc_proto); + if (err) + goto error; + } + + /* This is how often we ask the chip for IR information */ + ir->polling = 100; /* ms */ + + /* init input device */ + snprintf(ir->name, sizeof(ir->name), "%s IR", + dev_name(&dev->intf->dev)); + + usb_make_path(udev, ir->phys, sizeof(ir->phys)); + strlcat(ir->phys, "/input0", sizeof(ir->phys)); + + rc->device_name = ir->name; + rc->input_phys = ir->phys; + rc->input_id.bustype = BUS_USB; + rc->input_id.version = 1; + rc->input_id.vendor = le16_to_cpu(udev->descriptor.idVendor); + rc->input_id.product = le16_to_cpu(udev->descriptor.idProduct); + rc->dev.parent = &dev->intf->dev; + rc->driver_name = MODULE_NAME; + + /* all done */ + err = rc_register_device(rc); + if (err) + goto error; + + dev_info(&dev->intf->dev, "Input extension successfully initialized\n"); + + return 0; + +error: + kfree(ir->i2c_client); + dev->ir = NULL; + rc_free_device(rc); + kfree(ir); +ref_put: + em28xx_shutdown_buttons(dev); + return err; +} + +static int em28xx_ir_fini(struct em28xx *dev) +{ + struct em28xx_IR *ir = dev->ir; + + if (dev->is_audio_only) { + /* Shouldn't initialize IR for this interface */ + return 0; + } + + dev_info(&dev->intf->dev, "Closing input extension\n"); + + em28xx_shutdown_buttons(dev); + + /* skip detach on non attached boards */ + if (!ir) + goto ref_put; + + rc_unregister_device(ir->rc); + + kfree(ir->i2c_client); + + /* done */ + kfree(ir); + dev->ir = NULL; + +ref_put: + kref_put(&dev->ref, em28xx_free_device); + + return 0; +} + +static int em28xx_ir_suspend(struct em28xx *dev) +{ + struct em28xx_IR *ir = dev->ir; + + if (dev->is_audio_only) + return 0; + + dev_info(&dev->intf->dev, "Suspending input extension\n"); + if (ir) + cancel_delayed_work_sync(&ir->work); + cancel_delayed_work_sync(&dev->buttons_query_work); + /* + * is canceling delayed work sufficient or does the rc event + * kthread needs stopping? kthread is stopped in + * ir_raw_event_unregister() + */ + return 0; +} + +static int em28xx_ir_resume(struct em28xx *dev) +{ + struct em28xx_IR *ir = dev->ir; + + if (dev->is_audio_only) + return 0; + + dev_info(&dev->intf->dev, "Resuming input extension\n"); + /* + * if suspend calls ir_raw_event_unregister(), the should call + * ir_raw_event_register() + */ + if (ir) + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); + if (dev->num_button_polling_addresses) + schedule_delayed_work(&dev->buttons_query_work, + msecs_to_jiffies(dev->button_polling_interval)); + return 0; +} + +static struct em28xx_ops rc_ops = { + .id = EM28XX_RC, + .name = "Em28xx Input Extension", + .init = em28xx_ir_init, + .fini = em28xx_ir_fini, + .suspend = em28xx_ir_suspend, + .resume = em28xx_ir_resume, +}; + +static int __init em28xx_rc_register(void) +{ + return em28xx_register_extension(&rc_ops); +} + +static void __exit em28xx_rc_unregister(void) +{ + em28xx_unregister_extension(&rc_ops); +} + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Mauro Carvalho Chehab"); +MODULE_DESCRIPTION(DRIVER_DESC " - input interface"); +MODULE_VERSION(EM28XX_VERSION); + +module_init(em28xx_rc_register); +module_exit(em28xx_rc_unregister); |