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path: root/drivers/media/pci/bt8xx/bttv-input.c
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Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-input.c')
-rw-r--r--drivers/media/pci/bt8xx/bttv-input.c579
1 files changed, 579 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 0000000000..41226f1d0e
--- /dev/null
+++ b/drivers/media/pci/bt8xx/bttv-input.c
@@ -0,0 +1,579 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * Copyright (c) 2003 Gerd Knorr
+ * Copyright (c) 2003 Pavel Machek
+ */
+
+#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_PROTO_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_PROTO_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) ? 1UL << 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_PROTO_UNKNOWN, data, 0);
+ if (keyup)
+ rc_keyup(ir->dev);
+ } else {
+ if ((ir->last_gpio & 1UL << 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_PROTO_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(struct timer_list *t)
+{
+ struct bttv_ir *ir = from_timer(ir, t, timer);
+ struct bttv *btv = ir->btv;
+
+ 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(struct timer_list *t)
+{
+ struct bttv_ir *ir = from_timer(ir, t, timer);
+ ktime_t tv;
+ u32 gap, rc5, scancode;
+ u8 toggle, command, system;
+
+ /* get time */
+ tv = ktime_get();
+
+ gap = ktime_to_us(ktime_sub(tv, ir->base_time));
+ /* avoid overflow with gap >1s */
+ if (gap > USEC_PER_SEC) {
+ gap = 200000;
+ }
+ /* 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_PROTO_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;
+ ktime_t 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;
+ tv = ktime_get();
+
+ gap = ktime_to_us(ktime_sub(tv, ir->base_time));
+ /* avoid overflow with gap >1s */
+ if (gap > USEC_PER_SEC) {
+ gap = 200000;
+ }
+
+ 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_ir *ir)
+{
+ if (ir->polling) {
+ timer_setup(&ir->timer, bttv_input_timer, 0);
+ ir->timer.expires = jiffies + msecs_to_jiffies(1000);
+ add_timer(&ir->timer);
+ } else if (ir->rc5_gpio) {
+ /* set timer_end for code completion */
+ timer_setup(&ir->timer, bttv_rc5_timer_end, 0);
+ 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_proto *protocol,
+ u32 *scancode, u8 *toggle)
+{
+ int rc;
+ unsigned char b;
+
+ /* poll IR chip */
+ rc = i2c_master_recv(ir->c, &b, 1);
+ if (rc != 1) {
+ dprintk("read error\n");
+ if (rc < 0)
+ return rc;
+ 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_PROTO_UNKNOWN;
+ *scancode = b;
+ *toggle = 0;
+ return 1;
+}
+
+/* Instantiate the I2C IR receiver device, if present */
+void init_bttv_i2c_ir(struct bttv *btv)
+{
+ static 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));
+ strscpy(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_client_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_scanned_device(&btv->c.i2c_adap, &info, addr_list, NULL);
+ }
+ if (IS_ERR(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(RC_DRIVER_SCANCODE);
+ 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;
+ ir->btv = btv;
+
+ 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->device_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(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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 14:39:09 +0000