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V4L/DVB: cx23885: Convert cx23885-input to use new in kernel IR pulse decoders 

Convert the cx23885 driver to use the new in kernel IR pulse
decoders for the integrated CX2388[578] IR controllers.  Rip out a lot
of RC-5 decoding related code in the process and rename some variables
for clarity or to more accurately describe their usage.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2010-06-27 23:15:35 -03:00 committed by Mauro Carvalho Chehab
parent eeefae532e
commit 43c2407820
3 changed files with 118 additions and 228 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

325
drivers/media/video/cx23885/cx23885-input.c
View File

@ -37,161 +37,55 @@
#include <linux/input.h>
#include <linux/slab.h>
#include <media/ir-common.h>
#include <media/ir-core.h>
#include <media/v4l2-subdev.h>
#include "cx23885.h"
#define RC5_BITS 14
#define RC5_HALF_BITS (2*RC5_BITS)
#define RC5_HALF_BITS_MASK ((1 << RC5_HALF_BITS) - 1)
#define RC5_START_BITS_NORMAL 0x3 /* Command range 0 - 63 */
#define RC5_START_BITS_EXTENDED 0x2 /* Command range 64 - 127 */
#define RC5_EXTENDED_COMMAND_OFFSET 64
#define MODULE_NAME "cx23885"
static inline unsigned int rc5_command(u32 rc5_baseband)
static void convert_measurement(u32 x, struct ir_raw_event *y)
{
return RC5_INSTR(rc5_baseband) +
((RC5_START(rc5_baseband) == RC5_START_BITS_EXTENDED)
? RC5_EXTENDED_COMMAND_OFFSET : 0);
if (x == V4L2_SUBDEV_IR_PULSE_RX_SEQ_END) {
y->pulse = false;
y->duration = V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS;
return;
}
y->pulse = (x & V4L2_SUBDEV_IR_PULSE_LEVEL_MASK) ? true : false;
y->duration = x & V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS;
}
static void cx23885_input_process_raw_rc5(struct cx23885_dev *dev)
static void cx23885_input_process_measurements(struct cx23885_dev *dev,
bool overrun)
{
struct cx23885_ir_input *ir_input = dev->ir_input;
unsigned int code, command;
u32 rc5;
struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir;
struct ir_raw_event kernel_ir_event;
/* Ignore codes that are too short to be valid RC-5 */
if (ir_input->last_bit < (RC5_HALF_BITS - 1))
return;
/* The library has the manchester coding backwards; XOR to adapt. */
code = (ir_input->code & RC5_HALF_BITS_MASK) ^ RC5_HALF_BITS_MASK;
rc5 = ir_rc5_decode(code);
switch (RC5_START(rc5)) {
case RC5_START_BITS_NORMAL:
break;
case RC5_START_BITS_EXTENDED:
/* Don't allow if the remote only emits standard commands */
if (ir_input->start == RC5_START_BITS_NORMAL)
return;
break;
default:
return;
}
if (ir_input->addr != RC5_ADDR(rc5))
return;
/* Don't generate a keypress for RC-5 auto-repeated keypresses */
command = rc5_command(rc5);
if (RC5_TOGGLE(rc5) != RC5_TOGGLE(ir_input->last_rc5) ||
command != rc5_command(ir_input->last_rc5) ||
/* Catch T == 0, CMD == 0 (e.g. '0') as first keypress after init */
RC5_START(ir_input->last_rc5) == 0) {
/* This keypress is differnet: not an auto repeat */
ir_input_nokey(ir_input->dev, &ir_input->ir);
ir_input_keydown(ir_input->dev, &ir_input->ir, command);
}
ir_input->last_rc5 = rc5;
/* Schedule when we should do the key up event: ir_input_nokey() */
mod_timer(&ir_input->timer_keyup,
jiffies + msecs_to_jiffies(ir_input->rc5_key_timeout));
}
static void cx23885_input_next_pulse_width_rc5(struct cx23885_dev *dev,
u32 ns_pulse)
{
const int rc5_quarterbit_ns = 444444; /* 32 cycles/36 kHz/2 = 444 us */
struct cx23885_ir_input *ir_input = dev->ir_input;
int i, level, quarterbits, halfbits;
if (!ir_input->active) {
ir_input->active = 1;
/* assume an initial space that we may not detect or measure */
ir_input->code = 0;
ir_input->last_bit = 0;
}
if (ns_pulse == V4L2_SUBDEV_IR_PULSE_RX_SEQ_END) {
ir_input->last_bit++; /* Account for the final space */
ir_input->active = 0;
cx23885_input_process_raw_rc5(dev);
return;
}
level = (ns_pulse & V4L2_SUBDEV_IR_PULSE_LEVEL_MASK) ? 1 : 0;
/* Skip any leading space to sync to the start bit */
if (ir_input->last_bit == 0 && level == 0)
return;
/*
* With valid RC-5 we can get up to two consecutive half-bits in a
* single pulse measurment. Experiments have shown that the duration
* of a half-bit can vary. Make sure we always end up with an even
* number of quarter bits at the same level (mark or space).
*/
ns_pulse &= V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS;
quarterbits = ns_pulse / rc5_quarterbit_ns;
if (quarterbits & 1)
quarterbits++;
halfbits = quarterbits / 2;
for (i = 0; i < halfbits; i++) {
ir_input->last_bit++;
ir_input->code |= (level << ir_input->last_bit);
if (ir_input->last_bit >= RC5_HALF_BITS-1) {
ir_input->active = 0;
cx23885_input_process_raw_rc5(dev);
/*
* If level is 1, a leading mark is invalid for RC5.
* If level is 0, we scan past extra intial space.
* Either way we don't want to reactivate collecting
* marks or spaces here with any left over half-bits.
*/
break;
}
}
}
static void cx23885_input_process_pulse_widths_rc5(struct cx23885_dev *dev,
bool add_eom)
{
struct cx23885_ir_input *ir_input = dev->ir_input;
struct ir_input_state *ir_input_state = &ir_input->ir;
u32 ns_pulse[RC5_HALF_BITS+1];
ssize_t num = 0;
u32 sd_ir_data[64];
ssize_t num;
int count, i;
bool handle = false;
do {
v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ns_pulse,
sizeof(ns_pulse), &num);
num = 0;
v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) sd_ir_data,
sizeof(sd_ir_data), &num);
count = num / sizeof(u32);
/* Append an end of Rx seq, if the caller requested */
if (add_eom && count < ARRAY_SIZE(ns_pulse)) {
ns_pulse[count] = V4L2_SUBDEV_IR_PULSE_RX_SEQ_END;
count++;
for (i = 0; i < count; i++) {
convert_measurement(sd_ir_data[i], &kernel_ir_event);
ir_raw_event_store(kernel_ir->inp_dev,
&kernel_ir_event);
handle = true;
}
/* Just drain the Rx FIFO, if we're called, but not RC-5 */
if (ir_input_state->ir_type != IR_TYPE_RC5)
continue;
for (i = 0; i < count; i++)
cx23885_input_next_pulse_width_rc5(dev, ns_pulse[i]);
} while (num != 0);
if (overrun)
ir_raw_event_reset(kernel_ir->inp_dev);
else if (handle)
ir_raw_event_handle(kernel_ir->inp_dev);
}
void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
@ -230,7 +124,7 @@ void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
}
if (data_available)
cx23885_input_process_pulse_widths_rc5(dev, overrun);
cx23885_input_process_measurements(dev, overrun);
if (overrun) {
/* If there was a FIFO overrun, clear & restart the device */
@ -241,34 +135,15 @@ void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events)
}
}
static void cx23885_input_ir_start(struct cx23885_dev *dev)
static int cx23885_input_ir_start(struct cx23885_dev *dev)
{
struct cx23885_ir_input *ir_input = dev->ir_input;
struct ir_input_state *ir_input_state = &ir_input->ir;
struct v4l2_subdev_ir_parameters params;
if (dev->sd_ir == NULL)
return;
return -ENODEV;
atomic_set(&dev->ir_input_stopping, 0);
/* keyup timer set up, if needed */
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
case CX23885_BOARD_HAUPPAUGE_HVR1290:
setup_timer(&ir_input->timer_keyup,
ir_rc5_timer_keyup, /* Not actually RC-5 specific */
(unsigned long) ir_input);
if (ir_input_state->ir_type == IR_TYPE_RC5) {
/*
* RC-5 repeats a held key every
* 64 bits * (2 * 32/36000) sec/bit = 113.778 ms
*/
ir_input->rc5_key_timeout = 115;
}
break;
}
v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, &params);
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
@ -299,11 +174,21 @@ static void cx23885_input_ir_start(struct cx23885_dev *dev)
break;
}
v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, &params);
return 0;
}
static int cx23885_input_ir_open(void *priv)
{
struct cx23885_kernel_ir *kernel_ir = priv;
if (kernel_ir->cx == NULL)
return -ENODEV;
return cx23885_input_ir_start(kernel_ir->cx);
}
static void cx23885_input_ir_stop(struct cx23885_dev *dev)
{
struct cx23885_ir_input *ir_input = dev->ir_input;
struct v4l2_subdev_ir_parameters params;
if (dev->sd_ir == NULL)
@ -327,21 +212,26 @@ static void cx23885_input_ir_stop(struct cx23885_dev *dev)
}
flush_scheduled_work();
}
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
case CX23885_BOARD_HAUPPAUGE_HVR1290:
del_timer_sync(&ir_input->timer_keyup);
break;
}
static void cx23885_input_ir_close(void *priv)
{
struct cx23885_kernel_ir *kernel_ir = priv;
if (kernel_ir->cx != NULL)
cx23885_input_ir_stop(kernel_ir->cx);
}
int cx23885_input_init(struct cx23885_dev *dev)
{
struct cx23885_ir_input *ir;
struct input_dev *input_dev;
char *ir_codes = NULL;
int ir_type, ir_addr, ir_start;
struct cx23885_kernel_ir *kernel_ir;
struct input_dev *inp_dev;
struct ir_dev_props *props;
char *rc_map;
enum rc_driver_type driver_type;
unsigned long allowed_protos;
int ret;
/*
@ -354,53 +244,59 @@ int cx23885_input_init(struct cx23885_dev *dev)
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
case CX23885_BOARD_HAUPPAUGE_HVR1290:
/* Parameters for the grey Hauppauge remote for the HVR-1850 */
ir_codes = RC_MAP_HAUPPAUGE_NEW;
ir_type = IR_TYPE_RC5;
ir_addr = 0x1e; /* RC-5 system bits emitted by the remote */
ir_start = RC5_START_BITS_NORMAL; /* A basic RC-5 remote */
/* Integrated CX23888 IR controller */
driver_type = RC_DRIVER_IR_RAW;
allowed_protos = IR_TYPE_ALL;
/* The grey Hauppauge RC-5 remote */
rc_map = RC_MAP_RC5_HAUPPAUGE_NEW;
break;
}
if (ir_codes == NULL)
default:
return -ENODEV;
}
ir = kzalloc(sizeof(*ir), GFP_KERNEL);
input_dev = input_allocate_device();
if (!ir || !input_dev) {
/* cx23885 board instance kernel IR state */
kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL);
if (kernel_ir == NULL)
return -ENOMEM;
kernel_ir->cx = dev;
kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
cx23885_boards[dev->board].name);
kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
pci_name(dev->pci));
/* input device */
inp_dev = input_allocate_device();
if (inp_dev == NULL) {
ret = -ENOMEM;
goto err_out_free;
}
ir->dev = input_dev;
ir->addr = ir_addr;
ir->start = ir_start;
/* init input device */
ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)",
cx23885_boards[dev->board].name);
ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0", pci_name(dev->pci));
ret = ir_input_init(input_dev, &ir->ir, ir_type);
if (ret < 0)
goto err_out_free;
input_dev->name = ir->name;
input_dev->phys = ir->phys;
input_dev->id.bustype = BUS_PCI;
input_dev->id.version = 1;
kernel_ir->inp_dev = inp_dev;
inp_dev->name = kernel_ir->name;
inp_dev->phys = kernel_ir->phys;
inp_dev->id.bustype = BUS_PCI;
inp_dev->id.version = 1;
if (dev->pci->subsystem_vendor) {
input_dev->id.vendor = dev->pci->subsystem_vendor;
input_dev->id.product = dev->pci->subsystem_device;
inp_dev->id.vendor = dev->pci->subsystem_vendor;
inp_dev->id.product = dev->pci->subsystem_device;
} else {
input_dev->id.vendor = dev->pci->vendor;
input_dev->id.product = dev->pci->device;
inp_dev->id.vendor = dev->pci->vendor;
inp_dev->id.product = dev->pci->device;
}
input_dev->dev.parent = &dev->pci->dev;
inp_dev->dev.parent = &dev->pci->dev;
dev->ir_input = ir;
cx23885_input_ir_start(dev);
/* kernel ir device properties */
props = &kernel_ir->props;
props->driver_type = driver_type;
props->allowed_protos = allowed_protos;
props->priv = kernel_ir;
props->open = cx23885_input_ir_open;
props->close = cx23885_input_ir_close;
ret = ir_input_register(ir->dev, ir_codes, NULL, MODULE_NAME);
/* Go */
dev->kernel_ir = kernel_ir;
ret = ir_input_register(inp_dev, rc_map, props, MODULE_NAME);
if (ret)
goto err_out_stop;
@ -408,11 +304,12 @@ int cx23885_input_init(struct cx23885_dev *dev)
err_out_stop:
cx23885_input_ir_stop(dev);
dev->ir_input = NULL;
dev->kernel_ir = NULL;
/* TODO: double check clean-up of kernel_ir->inp_dev */
err_out_free:
kfree(ir->phys);
kfree(ir->name);
kfree(ir);
kfree(kernel_ir->phys);
kfree(kernel_ir->name);
kfree(kernel_ir);
return ret;
}
@ -421,11 +318,11 @@ void cx23885_input_fini(struct cx23885_dev *dev)
/* Always stop the IR hardware from generating interrupts */
cx23885_input_ir_stop(dev);
if (dev->ir_input == NULL)
if (dev->kernel_ir == NULL)
return;
ir_input_unregister(dev->ir_input->dev);
kfree(dev->ir_input->phys);
kfree(dev->ir_input->name);
kfree(dev->ir_input);
dev->ir_input = NULL;
ir_input_unregister(dev->kernel_ir->inp_dev);
kfree(dev->kernel_ir->phys);
kfree(dev->kernel_ir->name);
kfree(dev->kernel_ir);
dev->kernel_ir = NULL;
}

2
drivers/media/video/cx23885/cx23885-ir.c
View File

@ -53,7 +53,7 @@ void cx23885_ir_rx_work_handler(struct work_struct *work)
if (events == 0)
return;
if (dev->ir_input)
if (dev->kernel_ir)
cx23885_input_rx_work_handler(dev, events);
}

19
drivers/media/video/cx23885/cx23885.h
View File

@ -30,7 +30,7 @@
#include <media/tveeprom.h>
#include <media/videobuf-dma-sg.h>
#include <media/videobuf-dvb.h>
#include <media/ir-common.h>
#include <media/ir-core.h>
#include "btcx-risc.h"
#include "cx23885-reg.h"
@ -305,20 +305,13 @@ struct cx23885_tsport {
void *port_priv;
};
struct cx23885_ir_input {
struct input_dev *dev;
struct ir_input_state ir;
struct cx23885_kernel_ir {
struct cx23885_dev *cx;
char *name;
char *phys;
int start;
int addr;
int rc5_key_timeout;
struct timer_list timer_keyup;
u32 last_rc5;
u32 last_bit;
u32 code;
int active;
struct input_dev *inp_dev;
struct ir_dev_props props;
};
struct cx23885_dev {
@ -380,7 +373,7 @@ struct cx23885_dev {
struct work_struct ir_tx_work;
unsigned long ir_tx_notifications;
struct cx23885_ir_input *ir_input;
struct cx23885_kernel_ir *kernel_ir;
atomic_t ir_input_stopping;
/* V4l */