diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-input.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-input.c | 661 |
1 files changed, 433 insertions, 228 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-input.c b/drivers/media/usb/em28xx/em28xx-input.c index ea181e4b68c5..5f3b00869bdb 100644 --- a/drivers/media/usb/em28xx/em28xx-input.c +++ b/drivers/media/usb/em28xx/em28xx-input.c @@ -1,37 +1,26 @@ -/* - 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 - */ +// 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> + +#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/usb/input.h> #include <linux/slab.h> +#include <linux/bitrev.h> -#include "em28xx.h" - -#define EM28XX_SNAPSHOT_KEY KEY_CAMERA -#define EM28XX_SBUTTON_QUERY_INTERVAL 500 +#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); @@ -39,26 +28,27 @@ 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); \ - } +#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 - **********************************************************/ +/* + * 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 */ @@ -66,29 +56,37 @@ struct em28xx_IR { struct delayed_work work; unsigned int full_code:1; unsigned int last_readcount; - u64 rc_type; + u64 rc_proto; - /* i2c slave address of external device (if used) */ - u16 i2c_dev_addr; + struct i2c_client *i2c_client; - int (*get_key_i2c)(struct i2c_client *, u32 *); - int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); + 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 - **********************************************************/ +/* + * I2C IR based get keycodes - should be used with ir-kbd-i2c + */ -static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, u32 *ir_key) +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 */ - if (1 != i2c_master_recv(i2c_dev, &b, 1)) + 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. */ + /* + * 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; @@ -97,14 +95,15 @@ static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, u32 *ir_key) /* keep old data */ return 1; - *ir_key = b; + *protocol = RC_PROTO_UNKNOWN; + *scancode = b; return 1; } -static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, u32 *ir_key) +static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, + enum rc_proto *protocol, u32 *scancode) { unsigned char buf[2]; - u16 code; int size; /* poll IR chip */ @@ -126,70 +125,70 @@ static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, u32 *ir_key) * 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 */ - - /* return key */ - *ir_key = code; + *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, - u32 *ir_key) + enum rc_proto *protocol, + u32 *scancode) { unsigned char buf[3]; /* poll IR chip */ - if (3 != i2c_master_recv(i2c_dev, buf, 3)) + if (i2c_master_recv(i2c_dev, buf, 3) != 3) return -EIO; if (buf[0] != 0x00) return 0; - *ir_key = buf[2]&0x3f; - + *protocol = RC_PROTO_UNKNOWN; + *scancode = buf[2] & 0x3f; return 1; } static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev, - u32 *ir_key) + 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} }; + 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)) + if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2) return -EIO; if (keydetect == 0x00) return 0; subaddr = 0x00; msg[1].buf = &key; - if (2 != i2c_transfer(i2c_dev->adapter, msg, 2)) + if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2) return -EIO; if (key == 0x00) return 0; - *ir_key = key; + *protocol = RC_PROTO_UNKNOWN; + *scancode = key; return 1; } -/********************************************************** - Poll based get keycode functions - **********************************************************/ +/* + * Poll based get keycode functions + */ /* This is for the em2860/em2880 */ static int default_polling_getkey(struct em28xx_IR *ir, @@ -199,8 +198,9 @@ static int default_polling_getkey(struct em28xx_IR *ir, int rc; u8 msg[3] = { 0, 0, 0 }; - /* Read key toggle, brand, and key code - on registers 0x45, 0x46 and 0x47 + /* + * 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)); @@ -214,7 +214,22 @@ static int default_polling_getkey(struct em28xx_IR *ir, poll_result->read_count = (msg[0] & 0x7f); /* Remote Control Address/Data (Regs 0x46/0x47) */ - poll_result->scancode = msg[1] << 8 | msg[2]; + 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; } @@ -226,8 +241,9 @@ static int em2874_polling_getkey(struct em28xx_IR *ir, int rc; u8 msg[5] = { 0, 0, 0, 0, 0 }; - /* Read key toggle, brand, and key code - on registers 0x51-55 + /* + * 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)); @@ -244,27 +260,24 @@ static int em2874_polling_getkey(struct em28xx_IR *ir, * Remote Control Address (Reg 0x52) * Remote Control Data (Reg 0x53-0x55) */ - switch (ir->rc_type) { - case RC_BIT_RC5: - poll_result->scancode = msg[1] << 8 | msg[2]; + 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_BIT_NEC: - if ((msg[3] ^ msg[4]) != 0xff) /* 32 bits NEC */ - poll_result->scancode = (msg[1] << 24) | - (msg[2] << 16) | - (msg[3] << 8) | - msg[4]; - else if ((msg[1] ^ msg[2]) != 0xff) /* 24 bits NEC */ - poll_result->scancode = (msg[1] << 16) | - (msg[2] << 8) | - msg[3]; - else /* Normal NEC */ - poll_result->scancode = msg[1] << 8 | msg[3]; + + case RC_PROTO_BIT_NEC: + poll_result->scancode = ir_nec_bytes_to_scancode(msg[1], msg[2], msg[3], msg[4], + &poll_result->protocol); break; - case RC_BIT_RC6_0: - poll_result->scancode = msg[1] << 8 | msg[2]; + + 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; @@ -273,29 +286,26 @@ static int em2874_polling_getkey(struct em28xx_IR *ir, return 0; } -/********************************************************** - Polling code for em28xx - **********************************************************/ +/* + * Polling code for em28xx + */ static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) { - struct em28xx *dev = ir->dev; - static u32 ir_key; + static u32 scancode; + enum rc_proto protocol; int rc; - struct i2c_client client; - client.adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; - client.addr = ir->i2c_dev_addr; - - rc = ir->get_key_i2c(&client, &ir_key); + 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: keycode = 0x%04x\n", __func__, ir_key); - rc_keydown(ir->rc, ir_key, 0); + dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n", + __func__, protocol, scancode); + rc_keydown(ir->rc, protocol, scancode, 0); } return 0; } @@ -318,20 +328,25 @@ static void em28xx_ir_handle_key(struct em28xx_IR *ir) 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 */ + /* + * 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; @@ -342,7 +357,7 @@ static void em28xx_ir_work(struct work_struct *work) { struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); - if (ir->i2c_dev_addr) /* external i2c device */ + if (ir->i2c_client) /* external i2c device */ em28xx_i2c_ir_handle_key(ir); else /* internal device */ em28xx_ir_handle_key(ir); @@ -366,70 +381,71 @@ static void em28xx_ir_stop(struct rc_dev *rc) cancel_delayed_work_sync(&ir->work); } -static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) +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_type & RC_BIT_RC5) { + if (*rc_proto & RC_PROTO_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) { + *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_type = RC_BIT_NEC; - } else if (*rc_type & RC_BIT_UNKNOWN) { - *rc_type = RC_BIT_UNKNOWN; + *rc_proto = RC_PROTO_BIT_NEC; + } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { + *rc_proto = RC_PROTO_BIT_UNKNOWN; } else { - *rc_type = ir->rc_type; + *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_type = *rc_type; + ir->rc_proto = *rc_proto; return 0; } -static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) +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_type & RC_BIT_RC5) { + if (*rc_proto & RC_PROTO_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) { + *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_type = RC_BIT_NEC; - } else if (*rc_type & RC_BIT_RC6_0) { + *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_type = RC_BIT_RC6_0; - } else if (*rc_type & RC_BIT_UNKNOWN) { - *rc_type = RC_BIT_UNKNOWN; + *rc_proto = RC_PROTO_BIT_RC6_0; + } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { + *rc_proto = RC_PROTO_BIT_UNKNOWN; } else { - *rc_type = ir->rc_type; + *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_type = *rc_type; + ir->rc_proto = *rc_proto; return 0; } -static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) + +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; @@ -438,13 +454,15 @@ static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) switch (dev->chip_id) { case CHIP_ID_EM2860: case CHIP_ID_EM2883: - return em2860_ir_change_protocol(rc_dev, rc_type); + return em2860_ir_change_protocol(rc_dev, rc_proto); case CHIP_ID_EM2884: case CHIP_ID_EM2874: case CHIP_ID_EM28174: - return em2874_ir_change_protocol(rc_dev, rc_type); + case CHIP_ID_EM28178: + return em2874_ir_change_protocol(rc_dev, rc_proto); default: - printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n", + dev_err(&ir->dev->intf->dev, + "Unrecognized em28xx chip id 0x%02x: IR not supported\n", dev->chip_id); return -EINVAL; } @@ -453,15 +471,18 @@ static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) 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[] = { + /* + * 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. + */ + static 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) + if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], + addr_list[i]) == 1) return addr_list[i]; i++; } @@ -469,55 +490,103 @@ static int em28xx_probe_i2c_ir(struct em28xx *dev) return -ENODEV; } -/********************************************************** - Handle Webcam snapshot button - **********************************************************/ +/* + * Handle buttons + */ -static void em28xx_query_sbutton(struct work_struct *work) +static void em28xx_query_buttons(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); + 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->sbutton_query_work, - msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); + schedule_delayed_work(&dev->buttons_query_work, + msecs_to_jiffies(dev->button_polling_interval)); } -static void em28xx_register_snapshot_button(struct em28xx *dev) +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; - em28xx_info("Registering snapshot button...\n"); + dev_info(&dev->intf->dev, "Registering snapshot button...\n"); input_dev = input_allocate_device(); - if (!input_dev) { - em28xx_errdev("input_allocate_device failed\n"); - return; - } + if (!input_dev) + return -ENOMEM; - usb_make_path(dev->udev, dev->snapshot_button_path, + usb_make_path(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; @@ -525,67 +594,141 @@ static void em28xx_register_snapshot_button(struct em28xx *dev) 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; + usb_to_input_id(udev, &input_dev->id); + input_dev->dev.parent = &dev->intf->dev; err = input_register_device(input_dev); if (err) { - em28xx_errdev("input_register_device failed\n"); + dev_err(&dev->intf->dev, "input_register_device failed\n"); input_free_device(input_dev); - return; + return err; } dev->sbutton_input_dev = input_dev; - schedule_delayed_work(&dev->sbutton_query_work, - msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); - return; + 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_deregister_snapshot_button(struct em28xx *dev) +static void em28xx_shutdown_buttons(struct em28xx *dev) { - if (dev->sbutton_input_dev != NULL) { - em28xx_info("Deregistering snapshot button\n"); - cancel_delayed_work_sync(&dev->sbutton_query_work); + /* 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; } - return; } 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_type; + u64 rc_proto; u16 i2c_rc_dev_addr = 0; - if (dev->board.has_snapshot_button) - em28xx_register_snapshot_button(dev); + 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; + dev_warn(&dev->intf->dev, + "No i2c IR remote control device found.\n"); + err = -ENODEV; + goto ref_put; } } - if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) { + if (!dev->board.ir_codes && !dev->board.has_ir_i2c) { /* No remote control support */ - em28xx_warn("Remote control support is not available for " - "this card.\n"); + 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); - rc = rc_allocate_device(); - if (!ir || !rc) + if (!ir) + goto ref_put; + rc = rc_allocate_device(RC_DRIVER_SCANCODE); + if (!rc) goto error; /* record handles to ourself */ @@ -611,7 +754,7 @@ static int em28xx_ir_init(struct em28xx *dev) case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: rc->map_name = RC_MAP_HAUPPAUGE; ir->get_key_i2c = em28xx_get_key_em_haup; - rc->allowed_protos = RC_BIT_RC5; + rc->allowed_protocols = RC_PROTO_BIT_RC5; break; case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; @@ -622,20 +765,29 @@ static int em28xx_ir_init(struct em28xx *dev) goto error; } - ir->i2c_dev_addr = i2c_rc_dev_addr; + 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_protos = RC_BIT_RC5 | RC_BIT_NEC; + 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_protos = RC_BIT_RC5 | RC_BIT_NEC | - RC_BIT_RC6_0; + 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; @@ -646,8 +798,8 @@ static int em28xx_ir_init(struct em28xx *dev) 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); + rc_proto = RC_PROTO_BIT_UNKNOWN; + err = em28xx_ir_change_protocol(rc, &rc_proto); if (err) goto error; } @@ -655,19 +807,13 @@ static int em28xx_ir_init(struct em28xx *dev) /* 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)); + usb_make_path(udev, ir->phys, sizeof(ir->phys)); strlcat(ir->phys, "/input0", sizeof(ir->phys)); - rc->input_name = ir->name; + rc->device_name = em28xx_boards[dev->model].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; + usb_to_input_id(udev, &rc->input_id); + rc->dev.parent = &dev->intf->dev; rc->driver_name = MODULE_NAME; /* all done */ @@ -675,12 +821,17 @@ static int em28xx_ir_init(struct em28xx *dev) 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; } @@ -688,18 +839,69 @@ static int em28xx_ir_fini(struct em28xx *dev) { struct em28xx_IR *ir = dev->ir; - em28xx_deregister_snapshot_button(dev); + 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) - return 0; + goto ref_put; + + rc_unregister_device(ir->rc); - if (ir->rc) - 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; } @@ -708,6 +910,8 @@ static struct em28xx_ops rc_ops = { .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) @@ -720,9 +924,10 @@ 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_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); |