--- /dev/null
+/*
+ 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@infradead.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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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>
+
+#include "em28xx.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...) \
+ 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;
+
+ enum rc_type 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_type;
+
+ struct i2c_client *i2c_client;
+
+ int (*get_key_i2c)(struct i2c_client *ir, enum rc_type *protocol, u32 *scancode);
+ int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
+};
+
+/**********************************************************
+ 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_type *protocol, u32 *scancode)
+{
+ unsigned char b;
+
+ /* poll IR chip */
+ if (1 != i2c_master_recv(i2c_dev, &b, 1))
+ 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_TYPE_UNKNOWN;
+ *scancode = b;
+ return 1;
+}
+
+static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev,
+ enum rc_type *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_TYPE_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_type *protocol, u32 *scancode)
+{
+ unsigned char buf[3];
+
+ /* poll IR chip */
+
+ if (3 != i2c_master_recv(i2c_dev, buf, 3))
+ return -EIO;
+
+ if (buf[0] != 0x00)
+ return 0;
+
+ *protocol = RC_TYPE_UNKNOWN;
+ *scancode = buf[2] & 0x3f;
+ return 1;
+}
+
+static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev,
+ enum rc_type *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 (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
+ return -EIO;
+ if (keydetect == 0x00)
+ return 0;
+
+ subaddr = 0x00;
+ msg[1].buf = &key;
+ if (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
+ return -EIO;
+ if (key == 0x00)
+ return 0;
+
+ *protocol = RC_TYPE_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_type) {
+ case RC_BIT_RC5:
+ poll_result->protocol = RC_TYPE_RC5;
+ poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
+ break;
+
+ case RC_BIT_NEC:
+ poll_result->protocol = RC_TYPE_NEC;
+ poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]);
+ break;
+
+ default:
+ poll_result->protocol = RC_TYPE_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_type) {
+ case RC_BIT_RC5:
+ poll_result->protocol = RC_TYPE_RC5;
+ poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
+ break;
+
+ case RC_BIT_NEC:
+ poll_result->protocol = RC_TYPE_RC5;
+ poll_result->scancode = msg[1] << 8 | msg[2];
+ if ((msg[3] ^ msg[4]) != 0xff) /* 32 bits NEC */
+ 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->scancode = RC_SCANCODE_NECX(msg[1] << 8 |
+ msg[2], msg[3]);
+ else /* Normal NEC */
+ poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[3]);
+ break;
+
+ case RC_BIT_RC6_0:
+ poll_result->protocol = RC_TYPE_RC6_0;
+ poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]);
+ break;
+
+ default:
+ poll_result->protocol = RC_TYPE_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_type 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_TYPE_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_type)
+{
+ struct em28xx_IR *ir = rc_dev->priv;
+ struct em28xx *dev = ir->dev;
+
+ /* Adjust xclk based on IR table for RC5/NEC tables */
+ if (*rc_type & RC_BIT_RC5) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_RC5;
+ } else if (*rc_type & RC_BIT_NEC) {
+ dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_NEC;
+ } else if (*rc_type & RC_BIT_UNKNOWN) {
+ *rc_type = RC_BIT_UNKNOWN;
+ } else {
+ *rc_type = ir->rc_type;
+ return -EINVAL;
+ }
+ em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
+ EM28XX_XCLK_IR_RC5_MODE);
+
+ ir->rc_type = *rc_type;
+
+ return 0;
+}
+
+static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
+{
+ 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_type & RC_BIT_RC5) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_RC5;
+ } else if (*rc_type & RC_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_type = RC_BIT_NEC;
+ } else if (*rc_type & RC_BIT_RC6_0) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir_config = EM2874_IR_RC6_MODE_0;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_RC6_0;
+ } else if (*rc_type & RC_BIT_UNKNOWN) {
+ *rc_type = RC_BIT_UNKNOWN;
+ } else {
+ *rc_type = ir->rc_type;
+ 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_type = *rc_type;
+
+ return 0;
+}
+static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
+{
+ 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_type);
+ case CHIP_ID_EM2884:
+ case CHIP_ID_EM2874:
+ case CHIP_ID_EM28174:
+ case CHIP_ID_EM28178:
+ return em2874_ir_change_protocol(rc_dev, rc_type);
+ default:
+ printk("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) {
+ struct em28xx_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 input_dev *input_dev;
+ int err;
+
+ em28xx_info("Registering snapshot button...\n");
+ input_dev = input_allocate_device();
+ if (!input_dev)
+ return -ENOMEM;
+
+ usb_make_path(dev->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(dev->udev->descriptor.idVendor);
+ input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
+ input_dev->id.version = 1;
+ input_dev->dev.parent = &dev->udev->dev;
+
+ err = input_register_device(input_dev);
+ if (err) {
+ em28xx_errdev("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) {
+ 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)) {
+ em28xx_errdev("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 != NULL) {
+ em28xx_info("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 em28xx_IR *ir;
+ struct rc_dev *rc;
+ int err = -ENOMEM;
+ u64 rc_type;
+ 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;
+ em28xx_warn("No i2c IR remote control device found.\n");
+ return -ENODEV;
+ }
+ }
+
+ if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) {
+ /* No remote control support */
+ em28xx_warn("Remote control support is not available for "
+ "this card.\n");
+ return 0;
+ }
+
+ em28xx_info("Registering input extension\n");
+
+ ir = kzalloc(sizeof(*ir), GFP_KERNEL);
+ if (!ir)
+ return -ENOMEM;
+ rc = rc_allocate_device();
+ 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_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(struct 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_BIT_RC5 | RC_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_BIT_RC5 | RC_BIT_NEC |
+ RC_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_type = RC_BIT_UNKNOWN;
+ err = em28xx_ir_change_protocol(rc, &rc_type);
+ 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), "em28xx IR (%s)", dev->name);
+
+ usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
+ strlcat(ir->phys, "/input0", sizeof(ir->phys));
+
+ rc->input_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(dev->udev->descriptor.idVendor);
+ rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
+ rc->dev.parent = &dev->udev->dev;
+ rc->driver_name = MODULE_NAME;
+
+ /* all done */
+ err = rc_register_device(rc);
+ if (err)
+ goto error;
+
+ em28xx_info("Input extension successfully initalized\n");
+
+ return 0;
+
+error:
+ kfree(ir->i2c_client);
+ dev->ir = NULL;
+ rc_free_device(rc);
+ kfree(ir);
+ 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;
+ }
+
+ em28xx_info("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;
+
+ em28xx_info("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;
+
+ em28xx_info("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");
+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);
Code Review / kvmfornfv.git / blobdiff