1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/media/video/bt8xx/bttv-input.c b/drivers/media/video/bt8xx/bttv-input.c
new file mode 100644
index 00000000000..677d70c0e1c
--- /dev/null
+++ b/drivers/media/video/bt8xx/bttv-input.c
@@ -0,0 +1,588 @@
+/*
+ *
+ * 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
+ */
+
+#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(arg...) do {    \
+        if (ir_debug >= 1)      \
+                printk(arg);    \
+} 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(KERN_INFO DEVNAME ": 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, 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, 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(KERN_INFO DEVNAME ": gpio=0x%x code=%d | %s\n",
+                        gpio, data,
+                        (gpio & ir->mask_keyup) ? " up" : "up/down");
+
+                rc_keydown_notimeout(ir->dev, data, 0);
+                if (keyup)
+                        rc_keyup(ir->dev);
+        } else {
+                if ((ir->last_gpio & 1 << 31) == keyup)
+                        return;
+
+                dprintk(KERN_INFO DEVNAME ":(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, 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) & 3)
+#define RC5_TOGGLE(x)   (((x) >> 11) & 1)
+#define RC5_ADDR(x)     (((x) >> 6) & 31)
+#define RC5_INSTR(x)    ((x) & 63)
+
+/* 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(KERN_INFO DEVNAME ":rc5_decode(%x) bad code\n",
+                                org_code);
+                        return 0;
+                }
+        }
+        dprintk(KERN_INFO DEVNAME ":"
+                "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;
+        u32 rc5 = 0;
+
+        /* 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(KERN_INFO DEVNAME ": spurious timer_end\n");
+                return;
+        }
+
+        if (ir->last_bit < 20) {
+                /* ignore spurious codes (caused by light/other remotes) */
+                dprintk(KERN_INFO DEVNAME ": short code: %x\n", ir->code);
+        } else {
+                ir->code = (ir->code << ir->shift_by) | 1;
+                rc5 = bttv_rc5_decode(ir->code);
+
+                /* two start bits? */
+                if (RC5_START(rc5) != ir->start) {
+                        printk(KERN_INFO DEVNAME ":"
+                               " rc5 start bits invalid: %u\n", RC5_START(rc5));
+
+                        /* right address? */
+                } else if (RC5_ADDR(rc5) == ir->addr) {
+                        u32 toggle = RC5_TOGGLE(rc5);
+                        u32 instr = RC5_INSTR(rc5);
+
+                        /* Good code */
+                        rc_keydown(ir->dev, instr, toggle);
+                        dprintk(KERN_INFO DEVNAME ":"
+                                " instruction %x, toggle %x\n",
+                                instr, 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(KERN_INFO DEVNAME ": 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->start = 3;
+                ir->addr = 0x0;
+                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, u32 *ir_key, u32 *ir_raw)
+{
+        unsigned char b;
+
+        /* poll IR chip */
+        if (1 != i2c_master_recv(ir->c, &b, 1)) {
+                dprintk(KERN_INFO DEVNAME ": read error\n");
+                return -EIO;
+        }
+
+        /* ignore 0xaa */
+        if (b==0xaa)
+                return 0;
+        dprintk(KERN_INFO DEVNAME ": 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.
+         */
+
+        *ir_key = b;
+        *ir_raw = b;
+        return 1;
+}
+
+/* Instantiate the I2C IR receiver device, if present */
+void __devinit 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;
+
+        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;
+        default:
+                /*
+                 * 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_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
+                return;
+        }
+
+        if (btv->init_data.name)
+                info.platform_data = &btv->init_data;
+        i2c_new_device(&btv->c.i2c_adap, &info);
+
+        return;
+}
+
+int __devexit fini_bttv_i2c(struct bttv *btv)
+{
+        if (0 != btv->i2c_rc)
+                return 0;
+
+        return i2c_del_adapter(&btv->c.i2c_adap);
+}
+
+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:
+                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 (NULL == ir_codes) {
+                dprintk(KERN_INFO "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;
+}