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Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-input.c')
-rw-r--r--drivers/media/usb/em28xx/em28xx-input.c645
1 files changed, 645 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 000000000000..97d36b4f19db
--- /dev/null
+++ b/drivers/media/usb/em28xx/em28xx-input.c
@@ -0,0 +1,645 @@
+/*
+ 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 "em28xx.h"
+
+#define EM28XX_SNAPSHOT_KEY KEY_CAMERA
+#define EM28XX_SBUTTON_QUERY_INTERVAL 500
+#define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20
+
+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 i2cdprintk(fmt, arg...) \
+ if (ir_debug) { \
+ printk(KERN_DEBUG "%s/ir: " fmt, ir->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 rc_dev *rc;
+ char name[32];
+ char phys[32];
+
+ /* poll external decoder */
+ int polling;
+ struct delayed_work work;
+ unsigned int full_code:1;
+ unsigned int last_readcount;
+
+ 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 IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char b;
+
+ /* poll IR chip */
+ if (1 != i2c_master_recv(ir->c, &b, 1)) {
+ i2cdprintk("read error\n");
+ return -EIO;
+ }
+
+ /* it seems that 0xFE indicates that a button is still hold
+ down, while 0xff indicates that no button is hold
+ down. 0xfe sequences are sometimes interrupted by 0xFF */
+
+ i2cdprintk("key %02x\n", b);
+
+ if (b == 0xff)
+ return 0;
+
+ if (b == 0xfe)
+ /* keep old data */
+ return 1;
+
+ *ir_key = b;
+ *ir_raw = b;
+ return 1;
+}
+
+static int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char buf[2];
+ u16 code;
+ int size;
+
+ /* poll IR chip */
+ size = i2c_master_recv(ir->c, buf, sizeof(buf));
+
+ if (size != 2)
+ return -EIO;
+
+ /* Does eliminate repeated parity code */
+ if (buf[1] == 0xff)
+ return 0;
+
+ ir->old = buf[1];
+
+ /*
+ * 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.
+ */
+ code =
+ ((buf[0] & 0x01) ? 0x0020 : 0) | /* 0010 0000 */
+ ((buf[0] & 0x02) ? 0x0010 : 0) | /* 0001 0000 */
+ ((buf[0] & 0x04) ? 0x0008 : 0) | /* 0000 1000 */
+ ((buf[0] & 0x08) ? 0x0004 : 0) | /* 0000 0100 */
+ ((buf[0] & 0x10) ? 0x0002 : 0) | /* 0000 0010 */
+ ((buf[0] & 0x20) ? 0x0001 : 0) | /* 0000 0001 */
+ ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000 */
+ ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000 */
+ ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100 */
+ ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010 */
+ ((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */
+
+ i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n",
+ code, buf[1], buf[0]);
+
+ /* return key */
+ *ir_key = code;
+ *ir_raw = code;
+ return 1;
+}
+
+static int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
+ u32 *ir_raw)
+{
+ unsigned char buf[3];
+
+ /* poll IR chip */
+
+ if (3 != i2c_master_recv(ir->c, buf, 3)) {
+ i2cdprintk("read error\n");
+ return -EIO;
+ }
+
+ i2cdprintk("key %02x\n", buf[2]&0x3f);
+ if (buf[0] != 0x00)
+ return 0;
+
+ *ir_key = buf[2]&0x3f;
+ *ir_raw = buf[2]&0x3f;
+
+ return 1;
+}
+
+static int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c *ir, u32 *ir_key,
+ u32 *ir_raw)
+{
+ unsigned char subaddr, keydetect, key;
+
+ struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1},
+
+ { .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };
+
+ subaddr = 0x10;
+ if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+ i2cdprintk("read error\n");
+ return -EIO;
+ }
+ if (keydetect == 0x00)
+ return 0;
+
+ subaddr = 0x00;
+ msg[1].buf = &key;
+ if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+ i2cdprintk("read error\n");
+ return -EIO;
+ }
+ if (key == 0x00)
+ return 0;
+
+ *ir_key = key;
+ *ir_raw = 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;
+ 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%02x%02x\n", __func__,
+ poll_result.toggle_bit, poll_result.read_count,
+ poll_result.rc_address, poll_result.rc_data[0]);
+ if (ir->full_code)
+ rc_keydown(ir->rc,
+ poll_result.rc_address << 8 |
+ poll_result.rc_data[0],
+ poll_result.toggle_bit);
+ else
+ rc_keydown(ir->rc,
+ poll_result.rc_data[0],
+ 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);
+
+ 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 em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 rc_type)
+{
+ int rc = 0;
+ struct em28xx_IR *ir = rc_dev->priv;
+ struct em28xx *dev = ir->dev;
+ u8 ir_config = EM2874_IR_RC5;
+
+ /* Adjust xclk based o IR table for RC5/NEC tables */
+
+ if (rc_type == RC_TYPE_RC5) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ } else if (rc_type == RC_TYPE_NEC) {
+ dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
+ ir_config = EM2874_IR_NEC;
+ ir->full_code = 1;
+ } else if (rc_type != RC_TYPE_UNKNOWN)
+ rc = -EINVAL;
+
+ em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
+ EM28XX_XCLK_IR_RC5_MODE);
+
+ /* 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_EM2884:
+ case CHIP_ID_EM2874:
+ case CHIP_ID_EM28174:
+ ir->get_key = em2874_polling_getkey;
+ em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
+ break;
+ default:
+ printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n",
+ dev->chip_id);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+static void em28xx_register_i2c_ir(struct em28xx *dev)
+{
+ /* 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. */
+ struct i2c_board_info info;
+ const unsigned short addr_list[] = {
+ 0x1f, 0x30, 0x47, I2C_CLIENT_END
+ };
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ memset(&dev->init_data, 0, sizeof(dev->init_data));
+ strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
+
+ /* detect & configure */
+ switch (dev->model) {
+ case EM2800_BOARD_TERRATEC_CINERGY_200:
+ case EM2820_BOARD_TERRATEC_CINERGY_250:
+ dev->init_data.ir_codes = RC_MAP_EM_TERRATEC;
+ dev->init_data.get_key = em28xx_get_key_terratec;
+ dev->init_data.name = "i2c IR (EM28XX Terratec)";
+ break;
+ case EM2820_BOARD_PINNACLE_USB_2:
+ dev->init_data.ir_codes = RC_MAP_PINNACLE_GREY;
+ dev->init_data.get_key = em28xx_get_key_pinnacle_usb_grey;
+ dev->init_data.name = "i2c IR (EM28XX Pinnacle PCTV)";
+ break;
+ case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
+ dev->init_data.ir_codes = RC_MAP_HAUPPAUGE;
+ dev->init_data.get_key = em28xx_get_key_em_haup;
+ dev->init_data.name = "i2c IR (EM2840 Hauppauge)";
+ break;
+ case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE:
+ dev->init_data.ir_codes = RC_MAP_WINFAST_USBII_DELUXE;
+ dev->init_data.get_key = em28xx_get_key_winfast_usbii_deluxe;
+ dev->init_data.name = "i2c IR (EM2820 Winfast TV USBII Deluxe)";
+ break;
+ }
+
+ if (dev->init_data.name)
+ info.platform_data = &dev->init_data;
+ i2c_new_probed_device(&dev->i2c_adap, &info, addr_list, NULL);
+}
+
+/**********************************************************
+ Handle Webcam snapshot button
+ **********************************************************/
+
+static void em28xx_query_sbutton(struct work_struct *work)
+{
+ /* Poll the register and see if the button is depressed */
+ struct em28xx *dev =
+ container_of(work, struct em28xx, sbutton_query_work.work);
+ int ret;
+
+ ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);
+
+ if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
+ u8 cleared;
+ /* Button is depressed, clear the register */
+ cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
+ em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);
+
+ /* Not emulate the keypress */
+ input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
+ 1);
+ /* Now unpress the key */
+ input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
+ 0);
+ }
+
+ /* Schedule next poll */
+ schedule_delayed_work(&dev->sbutton_query_work,
+ msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
+}
+
+static void 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) {
+ em28xx_errdev("input_allocate_device failed\n");
+ return;
+ }
+
+ 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));
+ INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);
+
+ 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;
+ }
+
+ dev->sbutton_input_dev = input_dev;
+ schedule_delayed_work(&dev->sbutton_query_work,
+ msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
+ return;
+
+}
+
+static void em28xx_deregister_snapshot_button(struct em28xx *dev)
+{
+ if (dev->sbutton_input_dev != NULL) {
+ em28xx_info("Deregistering snapshot button\n");
+ cancel_delayed_work_sync(&dev->sbutton_query_work);
+ input_unregister_device(dev->sbutton_input_dev);
+ dev->sbutton_input_dev = NULL;
+ }
+ return;
+}
+
+static int em28xx_ir_init(struct em28xx *dev)
+{
+ struct em28xx_IR *ir;
+ struct rc_dev *rc;
+ int err = -ENOMEM;
+
+ if (dev->board.ir_codes == NULL) {
+ /* No remote control support */
+ em28xx_warn("Remote control support is not available for "
+ "this card.\n");
+ return 0;
+ }
+
+ ir = kzalloc(sizeof(*ir), GFP_KERNEL);
+ rc = rc_allocate_device();
+ if (!ir || !rc)
+ goto err_out_free;
+
+ /* record handles to ourself */
+ ir->dev = dev;
+ dev->ir = ir;
+ ir->rc = rc;
+
+ /*
+ * em2874 supports more protocols. For now, let's just announce
+ * the two protocols that were already tested
+ */
+ rc->allowed_protos = RC_TYPE_RC5 | RC_TYPE_NEC;
+ rc->priv = ir;
+ rc->change_protocol = em28xx_ir_change_protocol;
+ rc->open = em28xx_ir_start;
+ rc->close = em28xx_ir_stop;
+
+ /* By default, keep protocol field untouched */
+ err = em28xx_ir_change_protocol(rc, RC_TYPE_UNKNOWN);
+ if (err)
+ 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));
+
+ 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->map_name = dev->board.ir_codes;
+ rc->driver_name = MODULE_NAME;
+
+ /* all done */
+ err = rc_register_device(rc);
+ if (err)
+ goto err_out_stop;
+
+ em28xx_register_i2c_ir(dev);
+
+#if defined(CONFIG_MODULES) && defined(MODULE)
+ if (dev->board.has_ir_i2c)
+ request_module("ir-kbd-i2c");
+#endif
+ if (dev->board.has_snapshot_button)
+ em28xx_register_snapshot_button(dev);
+
+ return 0;
+
+ err_out_stop:
+ dev->ir = NULL;
+ err_out_free:
+ rc_free_device(rc);
+ kfree(ir);
+ return err;
+}
+
+static int em28xx_ir_fini(struct em28xx *dev)
+{
+ struct em28xx_IR *ir = dev->ir;
+
+ em28xx_deregister_snapshot_button(dev);
+
+ /* skip detach on non attached boards */
+ if (!ir)
+ return 0;
+
+ if (ir->rc)
+ rc_unregister_device(ir->rc);
+
+ /* done */
+ kfree(ir);
+ dev->ir = NULL;
+ return 0;
+}
+
+static struct em28xx_ops rc_ops = {
+ .id = EM28XX_RC,
+ .name = "Em28xx Input Extension",
+ .init = em28xx_ir_init,
+ .fini = em28xx_ir_fini,
+};
+
+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 <mchehab@redhat.com>");
+MODULE_DESCRIPTION("Em28xx Input driver");
+
+module_init(em28xx_rc_register);
+module_exit(em28xx_rc_unregister);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 03:02:21 +0000