1 files changed, 450 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 000000000000..69efa0e5174d
--- /dev/null
+++ b/drivers/media/video/bt8xx/bttv-input.c
@@ -0,0 +1,450 @@
+/*
+ *
+ * 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/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+
+#include "bttv.h"
+#include "bttvp.h"
+
+
+static int debug;
+module_param(debug, int, 0644);    /* debug level (0,1,2) */
+static int repeat_delay = 500;
+module_param(repeat_delay, int, 0644);
+static int repeat_period = 33;
+module_param(repeat_period, int, 0644);
+
+#define DEVNAME "bttv-input"
+
+/* ---------------------------------------------------------------------- */
+
+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  &&  (0 != (gpio & ir->mask_keydown))) ||
+            (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
+                ir_input_keydown(ir->dev,&ir->ir,data,data);
+        } else {
+                ir_input_nokey(ir->dev,&ir->ir);
+        }
+
+}
+
+void bttv_input_irq(struct bttv *btv)
+{
+        struct bttv_ir *ir = btv->remote;
+
+        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;
+        unsigned long timeout;
+
+        ir_handle_key(btv);
+        timeout = jiffies + (ir->polling * HZ / 1000);
+        mod_timer(&ir->timer, timeout);
+}
+
+/* ---------------------------------------------------------------*/
+
+static int rc5_remote_gap = 885;
+module_param(rc5_remote_gap, int, 0644);
+static int rc5_key_timeout = 200;
+module_param(rc5_key_timeout, int, 0644);
+
+#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 rc5_decode(unsigned int code)
+{
+        unsigned int org_code = code;
+        unsigned int pair;
+        unsigned int rc5 = 0;
+        int i;
+
+        code = (code << 1) | 1;
+        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_WARNING "bad code: %x\n", org_code);
+                        return 0;
+                }
+        }
+        dprintk(KERN_WARNING "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 int bttv_rc5_irq(struct bttv *btv)
+{
+        struct bttv_ir *ir = btv->remote;
+        struct timeval tv;
+        u32 gpio;
+        u32 gap;
+        unsigned long current_jiffies, timeout;
+
+        /* read gpio port */
+        gpio = bttv_gpio_read(&btv->c);
+
+        /* remote IRQ? */
+        if (!(gpio & 0x20))
+                return 0;
+
+        /* 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;
+        }
+
+        /* 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 - rc5_remote_gap / 2) /
+                            rc5_remote_gap;
+                        ir->code |= 1 << ir->last_bit;
+                }
+                /* starting new code */
+        } else {
+                ir->active = 1;
+                ir->code = 0;
+                ir->base_time = tv;
+                ir->last_bit = 0;
+
+                timeout = current_jiffies + (500 + 30 * HZ) / 1000;
+                mod_timer(&ir->timer_end, timeout);
+        }
+
+        /* 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_rc5_timer_end(unsigned long data)
+{
+        struct bttv_ir *ir = (struct bttv_ir *)data;
+        struct timeval tv;
+        unsigned long current_jiffies, timeout;
+        u32 gap;
+
+        /* get time */
+        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;
+        }
+
+        /* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
+        if (gap < 28000) {
+                dprintk(KERN_WARNING "spurious timer_end\n");
+                return;
+        }
+
+        ir->active = 0;
+        if (ir->last_bit < 20) {
+                /* ignore spurious codes (caused by light/other remotes) */
+                dprintk(KERN_WARNING "short code: %x\n", ir->code);
+        } else {
+                u32 rc5 = rc5_decode(ir->code);
+
+                /* two start bits? */
+                if (RC5_START(rc5) != 3) {
+                        dprintk(KERN_WARNING "rc5 start bits invalid: %u\n", RC5_START(rc5));
+
+                        /* right address? */
+                } else if (RC5_ADDR(rc5) == 0x0) {
+                        u32 toggle = RC5_TOGGLE(rc5);
+                        u32 instr = RC5_INSTR(rc5);
+
+                        /* Good code, decide if repeat/repress */
+                        if (toggle != RC5_TOGGLE(ir->last_rc5) ||
+                            instr != RC5_INSTR(ir->last_rc5)) {
+                                dprintk(KERN_WARNING "instruction %x, toggle %x\n", instr,
+                                        toggle);
+                                ir_input_nokey(ir->dev, &ir->ir);
+                                ir_input_keydown(ir->dev, &ir->ir, instr,
+                                                 instr);
+                        }
+
+                        /* Set/reset key-up timer */
+                        timeout = current_jiffies + (500 + rc5_key_timeout
+                                                     * HZ) / 1000;
+                        mod_timer(&ir->timer_keyup, timeout);
+
+                        /* Save code for repeat test */
+                        ir->last_rc5 = rc5;
+                }
+        }
+}
+
+static void bttv_rc5_timer_keyup(unsigned long data)
+{
+        struct bttv_ir *ir = (struct bttv_ir *)data;
+
+        dprintk(KERN_DEBUG "key released\n");
+        ir_input_nokey(ir->dev, &ir->ir);
+}
+
+/* ---------------------------------------------------------------------- */
+
+int bttv_input_init(struct bttv *btv)
+{
+        struct bttv_ir *ir;
+        IR_KEYTAB_TYPE *ir_codes = NULL;
+        struct input_dev *input_dev;
+        int ir_type = IR_TYPE_OTHER;
+
+        if (!btv->has_remote)
+                return -ENODEV;
+
+        ir = kzalloc(sizeof(*ir),GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!ir || !input_dev) {
+                kfree(ir);
+                input_free_device(input_dev);
+                return -ENOMEM;
+        }
+        memset(ir,0,sizeof(*ir));
+
+        /* detect & configure */
+        switch (btv->c.type) {
+        case BTTV_BOARD_AVERMEDIA:
+        case BTTV_BOARD_AVPHONE98:
+        case BTTV_BOARD_AVERMEDIA98:
+                ir_codes         = ir_codes_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         = ir_codes_avermedia_dvbt;
+                ir->mask_keycode = 0x0f00c0;
+                ir->mask_keydown = 0x000020;
+                ir->polling      = 50; // ms
+                break;
+
+        case BTTV_BOARD_PXELVWPLTVPAK:
+                ir_codes         = ir_codes_pixelview;
+                ir->mask_keycode = 0x003e00;
+                ir->mask_keyup   = 0x010000;
+                ir->polling      = 50; // ms
+                break;
+        case BTTV_BOARD_PV_BT878P_9B:
+        case BTTV_BOARD_PV_BT878P_PLUS:
+                ir_codes         = ir_codes_pixelview;
+                ir->mask_keycode = 0x001f00;
+                ir->mask_keyup   = 0x008000;
+                ir->polling      = 50; // ms
+                break;
+
+        case BTTV_BOARD_WINFAST2000:
+                ir_codes         = ir_codes_winfast;
+                ir->mask_keycode = 0x1f8;
+                break;
+        case BTTV_BOARD_MAGICTVIEW061:
+        case BTTV_BOARD_MAGICTVIEW063:
+                ir_codes         = ir_codes_winfast;
+                ir->mask_keycode = 0x0008e000;
+                ir->mask_keydown = 0x00200000;
+                break;
+        case BTTV_BOARD_APAC_VIEWCOMP:
+                ir_codes         = ir_codes_apac_viewcomp;
+                ir->mask_keycode = 0x001f00;
+                ir->mask_keyup   = 0x008000;
+                ir->polling      = 50; // ms
+                break;
+        case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
+        case BTTV_BOARD_CONTVFMI:
+                ir_codes         = ir_codes_pixelview;
+                ir->mask_keycode = 0x001F00;
+                ir->mask_keyup   = 0x006000;
+                ir->polling      = 50; // ms
+                break;
+        case BTTV_BOARD_NEBULA_DIGITV:
+                ir_codes = ir_codes_nebula;
+                btv->custom_irq = bttv_rc5_irq;
+                ir->rc5_gpio = 1;
+                break;
+        case BTTV_BOARD_MACHTV_MAGICTV:
+                ir_codes         = ir_codes_apac_viewcomp;
+                ir->mask_keycode = 0x001F00;
+                ir->mask_keyup   = 0x004000;
+                ir->polling      = 50; /* ms */
+                break;
+        }
+        if (NULL == ir_codes) {
+                dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n",btv->c.type);
+                kfree(ir);
+                input_free_device(input_dev);
+                return -ENODEV;
+        }
+
+        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 = input_dev;
+
+        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));
+
+        ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
+        input_dev->name = ir->name;
+        input_dev->phys = ir->phys;
+        input_dev->id.bustype = BUS_PCI;
+        input_dev->id.version = 1;
+        if (btv->c.pci->subsystem_vendor) {
+                input_dev->id.vendor  = btv->c.pci->subsystem_vendor;
+                input_dev->id.product = btv->c.pci->subsystem_device;
+        } else {
+                input_dev->id.vendor  = btv->c.pci->vendor;
+                input_dev->id.product = btv->c.pci->device;
+        }
+        input_dev->cdev.dev = &btv->c.pci->dev;
+
+        btv->remote = ir;
+        if (ir->polling) {
+                init_timer(&ir->timer);
+                ir->timer.function = bttv_input_timer;
+                ir->timer.data     = (unsigned long)btv;
+                ir->timer.expires  = jiffies + HZ;
+                add_timer(&ir->timer);
+        } else if (ir->rc5_gpio) {
+                /* set timer_end for code completion */
+                init_timer(&ir->timer_end);
+                ir->timer_end.function = bttv_rc5_timer_end;
+                ir->timer_end.data = (unsigned long)ir;
+
+                init_timer(&ir->timer_keyup);
+                ir->timer_keyup.function = bttv_rc5_timer_keyup;
+                ir->timer_keyup.data = (unsigned long)ir;
+        }
+
+        /* all done */
+        input_register_device(btv->remote->dev);
+        printk(DEVNAME ": %s detected at %s\n",ir->name,ir->phys);
+
+        /* the remote isn't as bouncy as a keyboard */
+        ir->dev->rep[REP_DELAY] = repeat_delay;
+        ir->dev->rep[REP_PERIOD] = repeat_period;
+
+        return 0;
+}
+
+void bttv_input_fini(struct bttv *btv)
+{
+        if (btv->remote == NULL)
+                return;
+
+        if (btv->remote->polling) {
+                del_timer_sync(&btv->remote->timer);
+                flush_scheduled_work();
+        }
+
+
+        if (btv->remote->rc5_gpio) {
+                u32 gpio;
+
+                del_timer_sync(&btv->remote->timer_end);
+                flush_scheduled_work();
+
+                gpio = bttv_gpio_read(&btv->c);
+                bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
+        }
+
+        input_unregister_device(btv->remote->dev);
+        kfree(btv->remote);
+        btv->remote = NULL;
+}
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */