diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/media/pci/bt8xx/bttv-input.c |
Initial import
Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-input.c')
-rw-r--r-- | drivers/media/pci/bt8xx/bttv-input.c | 590 |
1 files changed, 590 insertions, 0 deletions
diff --git a/drivers/media/pci/bt8xx/bttv-input.c b/drivers/media/pci/bt8xx/bttv-input.c new file mode 100644 index 000000000..67c8d6b2c --- /dev/null +++ b/drivers/media/pci/bt8xx/bttv-input.c @@ -0,0 +1,590 @@ +/* + * + * Copyright (c) 2003 Gerd Knorr + * Copyright (c) 2003 Pavel Machek + * + * 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 + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/slab.h> + +#include "bttv.h" +#include "bttvp.h" + + +static int ir_debug; +module_param(ir_debug, int, 0644); + +static int ir_rc5_remote_gap = 885; +module_param(ir_rc5_remote_gap, int, 0644); + +#undef dprintk +#define dprintk(fmt, ...) \ +do { \ + if (ir_debug >= 1) \ + pr_info(fmt, ##__VA_ARGS__); \ +} while (0) + +#define DEVNAME "bttv-input" + +#define MODULE_NAME "bttv" + +/* ---------------------------------------------------------------------- */ + +static void ir_handle_key(struct bttv *btv) +{ + struct bttv_ir *ir = btv->remote; + u32 gpio,data; + + /* read gpio value */ + gpio = bttv_gpio_read(&btv->c); + if (ir->polling) { + if (ir->last_gpio == gpio) + return; + ir->last_gpio = gpio; + } + + /* extract data */ + data = ir_extract_bits(gpio, ir->mask_keycode); + dprintk("irq gpio=0x%x code=%d | %s%s%s\n", + gpio, data, + ir->polling ? "poll" : "irq", + (gpio & ir->mask_keydown) ? " down" : "", + (gpio & ir->mask_keyup) ? " up" : ""); + + if ((ir->mask_keydown && (gpio & ir->mask_keydown)) || + (ir->mask_keyup && !(gpio & ir->mask_keyup))) { + rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); + } else { + /* HACK: Probably, ir->mask_keydown is missing + for this board */ + if (btv->c.type == BTTV_BOARD_WINFAST2000) + rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); + + rc_keyup(ir->dev); + } +} + +static void ir_enltv_handle_key(struct bttv *btv) +{ + struct bttv_ir *ir = btv->remote; + u32 gpio, data, keyup; + + /* read gpio value */ + gpio = bttv_gpio_read(&btv->c); + + /* extract data */ + data = ir_extract_bits(gpio, ir->mask_keycode); + + /* Check if it is keyup */ + keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0; + + if ((ir->last_gpio & 0x7f) != data) { + dprintk("gpio=0x%x code=%d | %s\n", + gpio, data, + (gpio & ir->mask_keyup) ? " up" : "up/down"); + + rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); + if (keyup) + rc_keyup(ir->dev); + } else { + if ((ir->last_gpio & 1 << 31) == keyup) + return; + + dprintk("(cnt) gpio=0x%x code=%d | %s\n", + gpio, data, + (gpio & ir->mask_keyup) ? " up" : "down"); + + if (keyup) + rc_keyup(ir->dev); + else + rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); + } + + ir->last_gpio = data | keyup; +} + +static int bttv_rc5_irq(struct bttv *btv); + +void bttv_input_irq(struct bttv *btv) +{ + struct bttv_ir *ir = btv->remote; + + if (ir->rc5_gpio) + bttv_rc5_irq(btv); + else if (!ir->polling) + ir_handle_key(btv); +} + +static void bttv_input_timer(unsigned long data) +{ + struct bttv *btv = (struct bttv*)data; + struct bttv_ir *ir = btv->remote; + + if (btv->c.type == BTTV_BOARD_ENLTV_FM_2) + ir_enltv_handle_key(btv); + else + ir_handle_key(btv); + mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); +} + +/* + * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying + * on the rc-core way. As we need to be sure that both IRQ transitions are + * properly triggered, Better to touch it only with this hardware for + * testing. + */ + +#define RC5_START(x) (((x) >> 12) & 0x03) +#define RC5_TOGGLE(x) (((x) >> 11) & 0x01) +#define RC5_ADDR(x) (((x) >> 6) & 0x1f) +#define RC5_INSTR(x) (((x) >> 0) & 0x3f) + +/* decode raw bit pattern to RC5 code */ +static u32 bttv_rc5_decode(unsigned int code) +{ + unsigned int org_code = code; + unsigned int pair; + unsigned int rc5 = 0; + int i; + + for (i = 0; i < 14; ++i) { + pair = code & 0x3; + code >>= 2; + + rc5 <<= 1; + switch (pair) { + case 0: + case 2: + break; + case 1: + rc5 |= 1; + break; + case 3: + dprintk("rc5_decode(%x) bad code\n", + org_code); + return 0; + } + } + dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, " + "instr=%x\n", rc5, org_code, RC5_START(rc5), + RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5)); + return rc5; +} + +static void bttv_rc5_timer_end(unsigned long data) +{ + struct bttv_ir *ir = (struct bttv_ir *)data; + struct timeval tv; + u32 gap, rc5, scancode; + u8 toggle, command, system; + + /* get time */ + do_gettimeofday(&tv); + + /* avoid overflow with gap >1s */ + if (tv.tv_sec - ir->base_time.tv_sec > 1) { + gap = 200000; + } else { + gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) + + tv.tv_usec - ir->base_time.tv_usec; + } + + /* signal we're ready to start a new code */ + ir->active = false; + + /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */ + if (gap < 28000) { + dprintk("spurious timer_end\n"); + return; + } + + if (ir->last_bit < 20) { + /* ignore spurious codes (caused by light/other remotes) */ + dprintk("short code: %x\n", ir->code); + return; + } + + ir->code = (ir->code << ir->shift_by) | 1; + rc5 = bttv_rc5_decode(ir->code); + + toggle = RC5_TOGGLE(rc5); + system = RC5_ADDR(rc5); + command = RC5_INSTR(rc5); + + switch (RC5_START(rc5)) { + case 0x3: + break; + case 0x2: + command += 0x40; + break; + default: + return; + } + + scancode = RC_SCANCODE_RC5(system, command); + rc_keydown(ir->dev, RC_TYPE_RC5, scancode, toggle); + dprintk("scancode %x, toggle %x\n", scancode, toggle); +} + +static int bttv_rc5_irq(struct bttv *btv) +{ + struct bttv_ir *ir = btv->remote; + struct timeval tv; + u32 gpio; + u32 gap; + unsigned long current_jiffies; + + /* read gpio port */ + gpio = bttv_gpio_read(&btv->c); + + /* get time of bit */ + current_jiffies = jiffies; + do_gettimeofday(&tv); + + /* avoid overflow with gap >1s */ + if (tv.tv_sec - ir->base_time.tv_sec > 1) { + gap = 200000; + } else { + gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) + + tv.tv_usec - ir->base_time.tv_usec; + } + + dprintk("RC5 IRQ: gap %d us for %s\n", + gap, (gpio & 0x20) ? "mark" : "space"); + + /* remote IRQ? */ + if (!(gpio & 0x20)) + return 0; + + /* active code => add bit */ + if (ir->active) { + /* only if in the code (otherwise spurious IRQ or timer + late) */ + if (ir->last_bit < 28) { + ir->last_bit = (gap - ir_rc5_remote_gap / 2) / + ir_rc5_remote_gap; + ir->code |= 1 << ir->last_bit; + } + /* starting new code */ + } else { + ir->active = true; + ir->code = 0; + ir->base_time = tv; + ir->last_bit = 0; + + mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30)); + } + + /* toggle GPIO pin 4 to reset the irq */ + bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); + bttv_gpio_write(&btv->c, gpio | (1 << 4)); + return 1; +} + +/* ---------------------------------------------------------------------- */ + +static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir) +{ + if (ir->polling) { + setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv); + ir->timer.expires = jiffies + msecs_to_jiffies(1000); + add_timer(&ir->timer); + } else if (ir->rc5_gpio) { + /* set timer_end for code completion */ + setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir); + ir->shift_by = 1; + ir->rc5_remote_gap = ir_rc5_remote_gap; + } +} + +static void bttv_ir_stop(struct bttv *btv) +{ + if (btv->remote->polling) + del_timer_sync(&btv->remote->timer); + + if (btv->remote->rc5_gpio) { + u32 gpio; + + del_timer_sync(&btv->remote->timer); + + gpio = bttv_gpio_read(&btv->c); + bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); + } +} + +/* + * Get_key functions used by I2C remotes + */ + +static int get_key_pv951(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + unsigned char b; + + /* poll IR chip */ + if (1 != i2c_master_recv(ir->c, &b, 1)) { + dprintk("read error\n"); + return -EIO; + } + + /* ignore 0xaa */ + if (b==0xaa) + return 0; + dprintk("key %02x\n", b); + + /* + * NOTE: + * lirc_i2c maps the pv951 code as: + * addr = 0x61D6 + * cmd = bit_reverse (b) + * So, it seems that this device uses NEC extended + * I decided to not fix the table, due to two reasons: + * 1) Without the actual device, this is only a guess; + * 2) As the addr is not reported via I2C, nor can be changed, + * the device is bound to the vendor-provided RC. + */ + + *protocol = RC_TYPE_UNKNOWN; + *scancode = b; + *toggle = 0; + return 1; +} + +/* Instantiate the I2C IR receiver device, if present */ +void init_bttv_i2c_ir(struct bttv *btv) +{ + const unsigned short addr_list[] = { + 0x1a, 0x18, 0x64, 0x30, 0x71, + I2C_CLIENT_END + }; + struct i2c_board_info info; + struct i2c_client *i2c_dev; + + if (0 != btv->i2c_rc) + return; + + memset(&info, 0, sizeof(struct i2c_board_info)); + memset(&btv->init_data, 0, sizeof(btv->init_data)); + strlcpy(info.type, "ir_video", I2C_NAME_SIZE); + + switch (btv->c.type) { + case BTTV_BOARD_PV951: + btv->init_data.name = "PV951"; + btv->init_data.get_key = get_key_pv951; + btv->init_data.ir_codes = RC_MAP_PV951; + info.addr = 0x4b; + break; + } + + if (btv->init_data.name) { + info.platform_data = &btv->init_data; + i2c_dev = i2c_new_device(&btv->c.i2c_adap, &info); + } else { + /* + * The external IR receiver is at i2c address 0x34 (0x35 for + * reads). Future Hauppauge cards will have an internal + * receiver at 0x30 (0x31 for reads). In theory, both can be + * fitted, and Hauppauge suggest an external overrides an + * internal. + * That's why we probe 0x1a (~0x34) first. CB + */ + i2c_dev = i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL); + } + if (NULL == i2c_dev) + return; + +#if defined(CONFIG_MODULES) && defined(MODULE) + request_module("ir-kbd-i2c"); +#endif +} + +int bttv_input_init(struct bttv *btv) +{ + struct bttv_ir *ir; + char *ir_codes = NULL; + struct rc_dev *rc; + int err = -ENOMEM; + + if (!btv->has_remote) + return -ENODEV; + + ir = kzalloc(sizeof(*ir),GFP_KERNEL); + rc = rc_allocate_device(); + if (!ir || !rc) + goto err_out_free; + + /* detect & configure */ + switch (btv->c.type) { + case BTTV_BOARD_AVERMEDIA: + case BTTV_BOARD_AVPHONE98: + case BTTV_BOARD_AVERMEDIA98: + ir_codes = RC_MAP_AVERMEDIA; + ir->mask_keycode = 0xf88000; + ir->mask_keydown = 0x010000; + ir->polling = 50; // ms + break; + + case BTTV_BOARD_AVDVBT_761: + case BTTV_BOARD_AVDVBT_771: + ir_codes = RC_MAP_AVERMEDIA_DVBT; + ir->mask_keycode = 0x0f00c0; + ir->mask_keydown = 0x000020; + ir->polling = 50; // ms + break; + + case BTTV_BOARD_PXELVWPLTVPAK: + ir_codes = RC_MAP_PIXELVIEW; + ir->mask_keycode = 0x003e00; + ir->mask_keyup = 0x010000; + ir->polling = 50; // ms + break; + case BTTV_BOARD_PV_M4900: + case BTTV_BOARD_PV_BT878P_9B: + case BTTV_BOARD_PV_BT878P_PLUS: + ir_codes = RC_MAP_PIXELVIEW; + ir->mask_keycode = 0x001f00; + ir->mask_keyup = 0x008000; + ir->polling = 50; // ms + break; + + case BTTV_BOARD_WINFAST2000: + ir_codes = RC_MAP_WINFAST; + ir->mask_keycode = 0x1f8; + break; + case BTTV_BOARD_MAGICTVIEW061: + case BTTV_BOARD_MAGICTVIEW063: + ir_codes = RC_MAP_WINFAST; + ir->mask_keycode = 0x0008e000; + ir->mask_keydown = 0x00200000; + break; + case BTTV_BOARD_APAC_VIEWCOMP: + ir_codes = RC_MAP_APAC_VIEWCOMP; + ir->mask_keycode = 0x001f00; + ir->mask_keyup = 0x008000; + ir->polling = 50; // ms + break; + case BTTV_BOARD_ASKEY_CPH03X: + case BTTV_BOARD_CONCEPTRONIC_CTVFMI2: + case BTTV_BOARD_CONTVFMI: + case BTTV_BOARD_KWORLD_VSTREAM_XPERT: + ir_codes = RC_MAP_PIXELVIEW; + ir->mask_keycode = 0x001F00; + ir->mask_keyup = 0x006000; + ir->polling = 50; // ms + break; + case BTTV_BOARD_NEBULA_DIGITV: + ir_codes = RC_MAP_NEBULA; + ir->rc5_gpio = true; + break; + case BTTV_BOARD_MACHTV_MAGICTV: + ir_codes = RC_MAP_APAC_VIEWCOMP; + ir->mask_keycode = 0x001F00; + ir->mask_keyup = 0x004000; + ir->polling = 50; /* ms */ + break; + case BTTV_BOARD_KOZUMI_KTV_01C: + ir_codes = RC_MAP_PCTV_SEDNA; + ir->mask_keycode = 0x001f00; + ir->mask_keyup = 0x006000; + ir->polling = 50; /* ms */ + break; + case BTTV_BOARD_ENLTV_FM_2: + ir_codes = RC_MAP_ENCORE_ENLTV2; + ir->mask_keycode = 0x00fd00; + ir->mask_keyup = 0x000080; + ir->polling = 1; /* ms */ + ir->last_gpio = ir_extract_bits(bttv_gpio_read(&btv->c), + ir->mask_keycode); + break; + } + + if (!ir_codes) { + dprintk("Ooops: IR config error [card=%d]\n", btv->c.type); + err = -ENODEV; + goto err_out_free; + } + + if (ir->rc5_gpio) { + u32 gpio; + /* enable remote irq */ + bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4); + gpio = bttv_gpio_read(&btv->c); + bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); + bttv_gpio_write(&btv->c, gpio | (1 << 4)); + } else { + /* init hardware-specific stuff */ + bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0); + } + + /* init input device */ + ir->dev = rc; + + snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)", + btv->c.type); + snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", + pci_name(btv->c.pci)); + + rc->input_name = ir->name; + rc->input_phys = ir->phys; + rc->input_id.bustype = BUS_PCI; + rc->input_id.version = 1; + if (btv->c.pci->subsystem_vendor) { + rc->input_id.vendor = btv->c.pci->subsystem_vendor; + rc->input_id.product = btv->c.pci->subsystem_device; + } else { + rc->input_id.vendor = btv->c.pci->vendor; + rc->input_id.product = btv->c.pci->device; + } + rc->dev.parent = &btv->c.pci->dev; + rc->map_name = ir_codes; + rc->driver_name = MODULE_NAME; + + btv->remote = ir; + bttv_ir_start(btv, ir); + + /* all done */ + err = rc_register_device(rc); + if (err) + goto err_out_stop; + + return 0; + + err_out_stop: + bttv_ir_stop(btv); + btv->remote = NULL; + err_out_free: + rc_free_device(rc); + kfree(ir); + return err; +} + +void bttv_input_fini(struct bttv *btv) +{ + if (btv->remote == NULL) + return; + + bttv_ir_stop(btv); + rc_unregister_device(btv->remote->dev); + kfree(btv->remote); + btv->remote = NULL; +} |