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android_kernel_motorola_sm6225/drivers/media/video/cx18/cx18-driver.c
Andy Walls 22dce188ef V4L/DVB (13430): cx18: Fix YUV capture so that encoder passes a single frame per transfer 
Fix YUV capture such that the encoder will pass one frame per transfer.  This
will allow the application to maintain frame alignment when a transfer from
the encoder is missed due to high system latency in service the CX23418 IRQ.

Also force YUV buffer sizes to be specified in multiples of 33.75 kB, the
smalled amount of buffer sizes need to store a complete set of HM12 4:2:0
macroblocks specifying 32 lines of the frame.  A full 60Hz/525 line
screen requires 15 * 33.75 kB per frame and a full 50Hz/625 line screen
requires 18 * 33.75 kB per frame so the default buffer size is 3 * 33.75 kB,
requiring exactly 5 or 6 buffers per MDL respectively.  The bytes needed per
frame and hence MDL need not be the bytes in an integer number of buffers.
However, if frame artifacts are seen with scaled screen sizes, the YUV buffer
size can be set 34 kB (33.75 kB) to get rid of the artifacts at the cost of more
copies between the kernel and userspace.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-05 18:41:52 -02:00

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/*
* cx18 driver initialization and card probing
*
* Derived from ivtv-driver.c
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
* Copyright (C) 2008 Andy Walls <awalls@radix.net>
*
* 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 "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-version.h"
#include "cx18-cards.h"
#include "cx18-i2c.h"
#include "cx18-irq.h"
#include "cx18-gpio.h"
#include "cx18-firmware.h"
#include "cx18-queue.h"
#include "cx18-streams.h"
#include "cx18-av-core.h"
#include "cx18-scb.h"
#include "cx18-mailbox.h"
#include "cx18-ioctl.h"
#include "tuner-xc2028.h"
#include <media/tveeprom.h>
/* If you have already X v4l cards, then set this to X. This way
the device numbers stay matched. Example: you have a WinTV card
without radio and a Compro H900 with. Normally this would give a
video1 device together with a radio0 device for the Compro. By
setting this to 1 you ensure that radio0 is now also radio1. */
int cx18_first_minor;
/* add your revision and whatnot here */
static struct pci_device_id cx18_pci_tbl[] __devinitdata = {
{PCI_VENDOR_ID_CX, PCI_DEVICE_ID_CX23418,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{0,}
};
MODULE_DEVICE_TABLE(pci, cx18_pci_tbl);
static atomic_t cx18_instance = ATOMIC_INIT(0);
/* Parameter declarations */
static int cardtype[CX18_MAX_CARDS];
static int tuner[CX18_MAX_CARDS] = { -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1 };
static int radio[CX18_MAX_CARDS] = { -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1 };
static unsigned cardtype_c = 1;
static unsigned tuner_c = 1;
static unsigned radio_c = 1;
static char pal[] = "--";
static char secam[] = "--";
static char ntsc[] = "-";
/* Buffers */
static int enc_ts_buffers = CX18_DEFAULT_ENC_TS_BUFFERS;
static int enc_mpg_buffers = CX18_DEFAULT_ENC_MPG_BUFFERS;
static int enc_idx_buffers = CX18_DEFAULT_ENC_IDX_BUFFERS;
static int enc_yuv_buffers = CX18_DEFAULT_ENC_YUV_BUFFERS;
static int enc_vbi_buffers = CX18_DEFAULT_ENC_VBI_BUFFERS;
static int enc_pcm_buffers = CX18_DEFAULT_ENC_PCM_BUFFERS;
static int enc_ts_bufsize = CX18_DEFAULT_ENC_TS_BUFSIZE;
static int enc_mpg_bufsize = CX18_DEFAULT_ENC_MPG_BUFSIZE;
static int enc_idx_bufsize = CX18_DEFAULT_ENC_IDX_BUFSIZE;
static int enc_yuv_bufsize = CX18_DEFAULT_ENC_YUV_BUFSIZE;
/* VBI bufsize based on standards supported by card tuner for now */
static int enc_pcm_bufsize = CX18_DEFAULT_ENC_PCM_BUFSIZE;
static int enc_ts_bufs = -1;
static int enc_mpg_bufs = -1;
static int enc_idx_bufs = -1;
static int enc_yuv_bufs = -1;
static int enc_vbi_bufs = -1;
static int enc_pcm_bufs = -1;
static int cx18_pci_latency = 1;
static int mmio_ndelay;
static int retry_mmio = 1;
int cx18_debug;
module_param_array(tuner, int, &tuner_c, 0644);
module_param_array(radio, bool, &radio_c, 0644);
module_param_array(cardtype, int, &cardtype_c, 0644);
module_param_string(pal, pal, sizeof(pal), 0644);
module_param_string(secam, secam, sizeof(secam), 0644);
module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
module_param_named(debug, cx18_debug, int, 0644);
module_param(mmio_ndelay, int, 0644);
module_param(retry_mmio, int, 0644);
module_param(cx18_pci_latency, int, 0644);
module_param(cx18_first_minor, int, 0644);
module_param(enc_ts_buffers, int, 0644);
module_param(enc_mpg_buffers, int, 0644);
module_param(enc_idx_buffers, int, 0644);
module_param(enc_yuv_buffers, int, 0644);
module_param(enc_vbi_buffers, int, 0644);
module_param(enc_pcm_buffers, int, 0644);
module_param(enc_ts_bufsize, int, 0644);
module_param(enc_mpg_bufsize, int, 0644);
module_param(enc_idx_bufsize, int, 0644);
module_param(enc_yuv_bufsize, int, 0644);
/* VBI bufsize based on standards supported by card tuner for now */
module_param(enc_pcm_bufsize, int, 0644);
module_param(enc_ts_bufs, int, 0644);
module_param(enc_mpg_bufs, int, 0644);
module_param(enc_idx_bufs, int, 0644);
module_param(enc_yuv_bufs, int, 0644);
module_param(enc_vbi_bufs, int, 0644);
module_param(enc_pcm_bufs, int, 0644);
MODULE_PARM_DESC(tuner, "Tuner type selection,\n"
"\t\t\tsee tuner.h for values");
MODULE_PARM_DESC(radio,
"Enable or disable the radio. Use only if autodetection\n"
"\t\t\tfails. 0 = disable, 1 = enable");
MODULE_PARM_DESC(cardtype,
"Only use this option if your card is not detected properly.\n"
"\t\tSpecify card type:\n"
"\t\t\t 1 = Hauppauge HVR 1600 (ESMT memory)\n"
"\t\t\t 2 = Hauppauge HVR 1600 (Samsung memory)\n"
"\t\t\t 3 = Compro VideoMate H900\n"
"\t\t\t 4 = Yuan MPC718\n"
"\t\t\t 5 = Conexant Raptor PAL/SECAM\n"
"\t\t\t 6 = Toshiba Qosmio DVB-T/Analog\n"
"\t\t\t 7 = Leadtek WinFast PVR2100\n"
"\t\t\t 8 = Leadtek WinFast DVR3100 H\n"
"\t\t\t 0 = Autodetect (default)\n"
"\t\t\t-1 = Ignore this card\n\t\t");
MODULE_PARM_DESC(pal, "Set PAL standard: B, G, H, D, K, I, M, N, Nc, 60");
MODULE_PARM_DESC(secam, "Set SECAM standard: B, G, H, D, K, L, LC");
MODULE_PARM_DESC(ntsc, "Set NTSC standard: M, J, K");
MODULE_PARM_DESC(debug,
"Debug level (bitmask). Default: 0\n"
"\t\t\t 1/0x0001: warning\n"
"\t\t\t 2/0x0002: info\n"
"\t\t\t 4/0x0004: mailbox\n"
"\t\t\t 8/0x0008: dma\n"
"\t\t\t 16/0x0010: ioctl\n"
"\t\t\t 32/0x0020: file\n"
"\t\t\t 64/0x0040: i2c\n"
"\t\t\t128/0x0080: irq\n"
"\t\t\t256/0x0100: high volume\n");
MODULE_PARM_DESC(cx18_pci_latency,
"Change the PCI latency to 64 if lower: 0 = No, 1 = Yes,\n"
"\t\t\tDefault: Yes");
MODULE_PARM_DESC(retry_mmio,
"(Deprecated) MMIO writes are now always checked and retried\n"
"\t\t\tEffectively: 1 [Yes]");
MODULE_PARM_DESC(mmio_ndelay,
"(Deprecated) MMIO accesses are now never purposely delayed\n"
"\t\t\tEffectively: 0 ns");
MODULE_PARM_DESC(enc_ts_buffers,
"Encoder TS buffer memory (MB). (enc_ts_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_TS_BUFFERS));
MODULE_PARM_DESC(enc_ts_bufsize,
"Size of an encoder TS buffer (kB)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_TS_BUFSIZE));
MODULE_PARM_DESC(enc_ts_bufs,
"Number of encoder TS buffers\n"
"\t\t\tDefault is computed from other enc_ts_* parameters");
MODULE_PARM_DESC(enc_mpg_buffers,
"Encoder MPG buffer memory (MB). (enc_mpg_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_MPG_BUFFERS));
MODULE_PARM_DESC(enc_mpg_bufsize,
"Size of an encoder MPG buffer (kB)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_MPG_BUFSIZE));
MODULE_PARM_DESC(enc_mpg_bufs,
"Number of encoder MPG buffers\n"
"\t\t\tDefault is computed from other enc_mpg_* parameters");
MODULE_PARM_DESC(enc_idx_buffers,
"Encoder IDX buffer memory (MB). (enc_idx_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_IDX_BUFFERS));
MODULE_PARM_DESC(enc_idx_bufsize,
"Size of an encoder IDX buffer (kB)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_IDX_BUFSIZE));
MODULE_PARM_DESC(enc_idx_bufs,
"Number of encoder IDX buffers\n"
"\t\t\tDefault is computed from other enc_idx_* parameters");
MODULE_PARM_DESC(enc_yuv_buffers,
"Encoder YUV buffer memory (MB). (enc_yuv_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_YUV_BUFFERS));
MODULE_PARM_DESC(enc_yuv_bufsize,
"Size of an encoder YUV buffer (kB)\n"
"\t\t\tAllowed values are multiples of 33.75 kB rounded up\n"
"\t\t\t(multiples of size required for 32 screen lines)\n"
"\t\t\tDefault: 102");
MODULE_PARM_DESC(enc_yuv_bufs,
"Number of encoder YUV buffers\n"
"\t\t\tDefault is computed from other enc_yuv_* parameters");
MODULE_PARM_DESC(enc_vbi_buffers,
"Encoder VBI buffer memory (MB). (enc_vbi_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_VBI_BUFFERS));
MODULE_PARM_DESC(enc_vbi_bufs,
"Number of encoder VBI buffers\n"
"\t\t\tDefault is computed from enc_vbi_buffers & tuner std");
MODULE_PARM_DESC(enc_pcm_buffers,
"Encoder PCM buffer memory (MB). (enc_pcm_bufs can override)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_PCM_BUFFERS));
MODULE_PARM_DESC(enc_pcm_bufsize,
"Size of an encoder PCM buffer (kB)\n"
"\t\t\tDefault: " __stringify(CX18_DEFAULT_ENC_PCM_BUFSIZE));
MODULE_PARM_DESC(enc_pcm_bufs,
"Number of encoder PCM buffers\n"
"\t\t\tDefault is computed from other enc_pcm_* parameters");
MODULE_PARM_DESC(cx18_first_minor, "Set device node number assigned to first card");
MODULE_AUTHOR("Hans Verkuil");
MODULE_DESCRIPTION("CX23418 driver");
MODULE_SUPPORTED_DEVICE("CX23418 MPEG2 encoder");
MODULE_LICENSE("GPL");
MODULE_VERSION(CX18_VERSION);
/* Generic utility functions */
int cx18_msleep_timeout(unsigned int msecs, int intr)
{
long int timeout = msecs_to_jiffies(msecs);
int sig;
do {
set_current_state(intr ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
timeout = schedule_timeout(timeout);
sig = intr ? signal_pending(current) : 0;
} while (!sig && timeout);
return sig;
}
/* Release ioremapped memory */
static void cx18_iounmap(struct cx18 *cx)
{
if (cx == NULL)
return;
/* Release io memory */
if (cx->enc_mem != NULL) {
CX18_DEBUG_INFO("releasing enc_mem\n");
iounmap(cx->enc_mem);
cx->enc_mem = NULL;
}
}
static void cx18_eeprom_dump(struct cx18 *cx, unsigned char *eedata, int len)
{
int i;
CX18_INFO("eeprom dump:\n");
for (i = 0; i < len; i++) {
if (0 == (i % 16))
CX18_INFO("eeprom %02x:", i);
printk(KERN_CONT " %02x", eedata[i]);
if (15 == (i % 16))
printk(KERN_CONT "\n");
}
}
/* Hauppauge card? get values from tveeprom */
void cx18_read_eeprom(struct cx18 *cx, struct tveeprom *tv)
{
struct i2c_client c;
u8 eedata[256];
memset(&c, 0, sizeof(c));
strlcpy(c.name, "cx18 tveeprom tmp", sizeof(c.name));
c.adapter = &cx->i2c_adap[0];
c.addr = 0xA0 >> 1;
memset(tv, 0, sizeof(*tv));
if (tveeprom_read(&c, eedata, sizeof(eedata)))
return;
switch (cx->card->type) {
case CX18_CARD_HVR_1600_ESMT:
case CX18_CARD_HVR_1600_SAMSUNG:
tveeprom_hauppauge_analog(&c, tv, eedata);
break;
case CX18_CARD_YUAN_MPC718:
tv->model = 0x718;
cx18_eeprom_dump(cx, eedata, sizeof(eedata));
CX18_INFO("eeprom PCI ID: %02x%02x:%02x%02x\n",
eedata[2], eedata[1], eedata[4], eedata[3]);
break;
default:
tv->model = 0xffffffff;
cx18_eeprom_dump(cx, eedata, sizeof(eedata));
break;
}
}
static void cx18_process_eeprom(struct cx18 *cx)
{
struct tveeprom tv;
cx18_read_eeprom(cx, &tv);
/* Many thanks to Steven Toth from Hauppauge for providing the
model numbers */
/* Note: the Samsung memory models cannot be reliably determined
from the model number. Use the cardtype module option if you
have one of these preproduction models. */
switch (tv.model) {
case 74000 ... 74999:
cx->card = cx18_get_card(CX18_CARD_HVR_1600_ESMT);
break;
case 0x718:
return;
case 0xffffffff:
CX18_INFO("Unknown EEPROM encoding\n");
return;
case 0:
CX18_ERR("Invalid EEPROM\n");
return;
default:
CX18_ERR("Unknown model %d, defaulting to HVR-1600\n", tv.model);
cx->card = cx18_get_card(CX18_CARD_HVR_1600_ESMT);
break;
}
cx->v4l2_cap = cx->card->v4l2_capabilities;
cx->card_name = cx->card->name;
cx->card_i2c = cx->card->i2c;
CX18_INFO("Autodetected %s\n", cx->card_name);
if (tv.tuner_type == TUNER_ABSENT)
CX18_ERR("tveeprom cannot autodetect tuner!\n");
if (cx->options.tuner == -1)
cx->options.tuner = tv.tuner_type;
if (cx->options.radio == -1)
cx->options.radio = (tv.has_radio != 0);
if (cx->std != 0)
/* user specified tuner standard */
return;
/* autodetect tuner standard */
if (tv.tuner_formats & V4L2_STD_PAL) {
CX18_DEBUG_INFO("PAL tuner detected\n");
cx->std |= V4L2_STD_PAL_BG | V4L2_STD_PAL_H;
} else if (tv.tuner_formats & V4L2_STD_NTSC) {
CX18_DEBUG_INFO("NTSC tuner detected\n");
cx->std |= V4L2_STD_NTSC_M;
} else if (tv.tuner_formats & V4L2_STD_SECAM) {
CX18_DEBUG_INFO("SECAM tuner detected\n");
cx->std |= V4L2_STD_SECAM_L;
} else {
CX18_INFO("No tuner detected, default to NTSC-M\n");
cx->std |= V4L2_STD_NTSC_M;
}
}
static v4l2_std_id cx18_parse_std(struct cx18 *cx)
{
switch (pal[0]) {
case '6':
return V4L2_STD_PAL_60;
case 'b':
case 'B':
case 'g':
case 'G':
return V4L2_STD_PAL_BG;
case 'h':
case 'H':
return V4L2_STD_PAL_H;
case 'n':
case 'N':
if (pal[1] == 'c' || pal[1] == 'C')
return V4L2_STD_PAL_Nc;
return V4L2_STD_PAL_N;
case 'i':
case 'I':
return V4L2_STD_PAL_I;
case 'd':
case 'D':
case 'k':
case 'K':
return V4L2_STD_PAL_DK;
case 'M':
case 'm':
return V4L2_STD_PAL_M;
case '-':
break;
default:
CX18_WARN("pal= argument not recognised\n");
return 0;
}
switch (secam[0]) {
case 'b':
case 'B':
case 'g':
case 'G':
case 'h':
case 'H':
return V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H;
case 'd':
case 'D':
case 'k':
case 'K':
return V4L2_STD_SECAM_DK;
case 'l':
case 'L':
if (secam[1] == 'C' || secam[1] == 'c')
return V4L2_STD_SECAM_LC;
return V4L2_STD_SECAM_L;
case '-':
break;
default:
CX18_WARN("secam= argument not recognised\n");
return 0;
}
switch (ntsc[0]) {
case 'm':
case 'M':
return V4L2_STD_NTSC_M;
case 'j':
case 'J':
return V4L2_STD_NTSC_M_JP;
case 'k':
case 'K':
return V4L2_STD_NTSC_M_KR;
case '-':
break;
default:
CX18_WARN("ntsc= argument not recognised\n");
return 0;
}
/* no match found */
return 0;
}
static void cx18_process_options(struct cx18 *cx)
{
int i, j;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_TS] = enc_ts_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_MPG] = enc_mpg_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_IDX] = enc_idx_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_YUV] = enc_yuv_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_VBI] = enc_vbi_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_PCM] = enc_pcm_buffers;
cx->options.megabytes[CX18_ENC_STREAM_TYPE_RAD] = 0; /* control only */
cx->stream_buffers[CX18_ENC_STREAM_TYPE_TS] = enc_ts_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_MPG] = enc_mpg_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] = enc_idx_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_YUV] = enc_yuv_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_VBI] = enc_vbi_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_PCM] = enc_pcm_bufs;
cx->stream_buffers[CX18_ENC_STREAM_TYPE_RAD] = 0; /* control, no data */
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_TS] = enc_ts_bufsize;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_MPG] = enc_mpg_bufsize;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_IDX] = enc_idx_bufsize;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_YUV] = enc_yuv_bufsize;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_VBI] = vbi_active_samples * 36;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_PCM] = enc_pcm_bufsize;
cx->stream_buf_size[CX18_ENC_STREAM_TYPE_RAD] = 0; /* control no data */
/* Ensure stream_buffers & stream_buf_size are valid */
for (i = 0; i < CX18_MAX_STREAMS; i++) {
if (cx->stream_buffers[i] == 0 || /* User said 0 buffers */
cx->options.megabytes[i] <= 0 || /* User said 0 MB total */
cx->stream_buf_size[i] <= 0) { /* User said buf size 0 */
cx->options.megabytes[i] = 0;
cx->stream_buffers[i] = 0;
cx->stream_buf_size[i] = 0;
continue;
}
/*
* YUV is a special case where the stream_buf_size needs to be
* an integral multiple of 33.75 kB (storage for 32 screens
* lines to maintain alignment in case of lost buffers
*/
if (i == CX18_ENC_STREAM_TYPE_YUV) {
cx->stream_buf_size[i] *= 1024;
cx->stream_buf_size[i] -=
(cx->stream_buf_size[i] % CX18_UNIT_ENC_YUV_BUFSIZE);
if (cx->stream_buf_size[i] < CX18_UNIT_ENC_YUV_BUFSIZE)
cx->stream_buf_size[i] =
CX18_UNIT_ENC_YUV_BUFSIZE;
}
/*
* YUV is a special case where the stream_buf_size is
* now in bytes.
* VBI is a special case where the stream_buf_size is fixed
* and already in bytes
*/
if (i == CX18_ENC_STREAM_TYPE_VBI ||
i == CX18_ENC_STREAM_TYPE_YUV) {
if (cx->stream_buffers[i] < 0) {
cx->stream_buffers[i] =
cx->options.megabytes[i] * 1024 * 1024
/ cx->stream_buf_size[i];
} else {
/* N.B. This might round down to 0 */
cx->options.megabytes[i] =
cx->stream_buffers[i]
* cx->stream_buf_size[i]/(1024 * 1024);
}
} else {
/* All other streams have stream_buf_size in kB here */
if (cx->stream_buffers[i] < 0) {
cx->stream_buffers[i] =
cx->options.megabytes[i] * 1024
/ cx->stream_buf_size[i];
} else {
/* N.B. This might round down to 0 */
cx->options.megabytes[i] =
cx->stream_buffers[i]
* cx->stream_buf_size[i] / 1024;
}
/* convert from kB to bytes */
cx->stream_buf_size[i] *= 1024;
}
CX18_DEBUG_INFO("Stream type %d options: %d MB, %d buffers, "
"%d bytes\n", i, cx->options.megabytes[i],
cx->stream_buffers[i], cx->stream_buf_size[i]);
}
cx->options.cardtype = cardtype[cx->instance];
cx->options.tuner = tuner[cx->instance];
cx->options.radio = radio[cx->instance];
cx->std = cx18_parse_std(cx);
if (cx->options.cardtype == -1) {
CX18_INFO("Ignore card\n");
return;
}
cx->card = cx18_get_card(cx->options.cardtype - 1);
if (cx->card)
CX18_INFO("User specified %s card\n", cx->card->name);
else if (cx->options.cardtype != 0)
CX18_ERR("Unknown user specified type, trying to autodetect card\n");
if (cx->card == NULL) {
if (cx->pci_dev->subsystem_vendor == CX18_PCI_ID_HAUPPAUGE) {
cx->card = cx18_get_card(CX18_CARD_HVR_1600_ESMT);
CX18_INFO("Autodetected Hauppauge card\n");
}
}
if (cx->card == NULL) {
for (i = 0; (cx->card = cx18_get_card(i)); i++) {
if (cx->card->pci_list == NULL)
continue;
for (j = 0; cx->card->pci_list[j].device; j++) {
if (cx->pci_dev->device !=
cx->card->pci_list[j].device)
continue;
if (cx->pci_dev->subsystem_vendor !=
cx->card->pci_list[j].subsystem_vendor)
continue;
if (cx->pci_dev->subsystem_device !=
cx->card->pci_list[j].subsystem_device)
continue;
CX18_INFO("Autodetected %s card\n", cx->card->name);
goto done;
}
}
}
done:
if (cx->card == NULL) {
cx->card = cx18_get_card(CX18_CARD_HVR_1600_ESMT);
CX18_ERR("Unknown card: vendor/device: [%04x:%04x]\n",
cx->pci_dev->vendor, cx->pci_dev->device);
CX18_ERR(" subsystem vendor/device: [%04x:%04x]\n",
cx->pci_dev->subsystem_vendor,
cx->pci_dev->subsystem_device);
CX18_ERR("Defaulting to %s card\n", cx->card->name);
CX18_ERR("Please mail the vendor/device and subsystem vendor/device IDs and what kind of\n");
CX18_ERR("card you have to the ivtv-devel mailinglist (www.ivtvdriver.org)\n");
CX18_ERR("Prefix your subject line with [UNKNOWN CX18 CARD].\n");
}
cx->v4l2_cap = cx->card->v4l2_capabilities;
cx->card_name = cx->card->name;
cx->card_i2c = cx->card->i2c;
}
static int __devinit cx18_create_in_workq(struct cx18 *cx)
{
snprintf(cx->in_workq_name, sizeof(cx->in_workq_name), "%s-in",
cx->v4l2_dev.name);
cx->in_work_queue = create_singlethread_workqueue(cx->in_workq_name);
if (cx->in_work_queue == NULL) {
CX18_ERR("Unable to create incoming mailbox handler thread\n");
return -ENOMEM;
}
return 0;
}
static int __devinit cx18_create_out_workq(struct cx18 *cx)
{
snprintf(cx->out_workq_name, sizeof(cx->out_workq_name), "%s-out",
cx->v4l2_dev.name);
cx->out_work_queue = create_workqueue(cx->out_workq_name);
if (cx->out_work_queue == NULL) {
CX18_ERR("Unable to create outgoing mailbox handler threads\n");
return -ENOMEM;
}
return 0;
}
static void __devinit cx18_init_in_work_orders(struct cx18 *cx)
{
int i;
for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++) {
cx->in_work_order[i].cx = cx;
cx->in_work_order[i].str = cx->epu_debug_str;
INIT_WORK(&cx->in_work_order[i].work, cx18_in_work_handler);
}
}
/* Precondition: the cx18 structure has been memset to 0. Only
the dev and instance fields have been filled in.
No assumptions on the card type may be made here (see cx18_init_struct2
for that).
*/
static int __devinit cx18_init_struct1(struct cx18 *cx)
{
int ret;
cx->base_addr = pci_resource_start(cx->pci_dev, 0);
mutex_init(&cx->serialize_lock);
mutex_init(&cx->gpio_lock);
mutex_init(&cx->epu2apu_mb_lock);
mutex_init(&cx->epu2cpu_mb_lock);
ret = cx18_create_out_workq(cx);
if (ret)
return ret;
ret = cx18_create_in_workq(cx);
if (ret) {
destroy_workqueue(cx->out_work_queue);
return ret;
}
cx18_init_in_work_orders(cx);
/* start counting open_id at 1 */
cx->open_id = 1;
/* Initial settings */
cx2341x_fill_defaults(&cx->params);
cx->temporal_strength = cx->params.video_temporal_filter;
cx->spatial_strength = cx->params.video_spatial_filter;
cx->filter_mode = cx->params.video_spatial_filter_mode |
(cx->params.video_temporal_filter_mode << 1) |
(cx->params.video_median_filter_type << 2);
cx->params.port = CX2341X_PORT_MEMORY;
cx->params.capabilities =
CX2341X_CAP_HAS_TS | CX2341X_CAP_HAS_SLICED_VBI;
init_waitqueue_head(&cx->cap_w);
init_waitqueue_head(&cx->mb_apu_waitq);
init_waitqueue_head(&cx->mb_cpu_waitq);
init_waitqueue_head(&cx->dma_waitq);
/* VBI */
cx->vbi.in.type = V4L2_BUF_TYPE_VBI_CAPTURE;
cx->vbi.sliced_in = &cx->vbi.in.fmt.sliced;
/* IVTV style VBI insertion into MPEG streams */
INIT_LIST_HEAD(&cx->vbi.sliced_mpeg_buf.list);
INIT_LIST_HEAD(&cx->vbi.sliced_mpeg_mdl.list);
INIT_LIST_HEAD(&cx->vbi.sliced_mpeg_mdl.buf_list);
list_add(&cx->vbi.sliced_mpeg_buf.list,
&cx->vbi.sliced_mpeg_mdl.buf_list);
return 0;
}
/* Second initialization part. Here the card type has been
autodetected. */
static void __devinit cx18_init_struct2(struct cx18 *cx)
{
int i;
for (i = 0; i < CX18_CARD_MAX_VIDEO_INPUTS; i++)
if (cx->card->video_inputs[i].video_type == 0)
break;
cx->nof_inputs = i;
for (i = 0; i < CX18_CARD_MAX_AUDIO_INPUTS; i++)
if (cx->card->audio_inputs[i].audio_type == 0)
break;
cx->nof_audio_inputs = i;
/* Find tuner input */
for (i = 0; i < cx->nof_inputs; i++) {
if (cx->card->video_inputs[i].video_type ==
CX18_CARD_INPUT_VID_TUNER)
break;
}
if (i == cx->nof_inputs)
i = 0;
cx->active_input = i;
cx->audio_input = cx->card->video_inputs[i].audio_index;
}
static int cx18_setup_pci(struct cx18 *cx, struct pci_dev *pci_dev,
const struct pci_device_id *pci_id)
{
u16 cmd;
unsigned char pci_latency;
CX18_DEBUG_INFO("Enabling pci device\n");
if (pci_enable_device(pci_dev)) {
CX18_ERR("Can't enable device %d!\n", cx->instance);
return -EIO;
}
if (pci_set_dma_mask(pci_dev, 0xffffffff)) {
CX18_ERR("No suitable DMA available, card %d\n", cx->instance);
return -EIO;
}
if (!request_mem_region(cx->base_addr, CX18_MEM_SIZE, "cx18 encoder")) {
CX18_ERR("Cannot request encoder memory region, card %d\n",
cx->instance);
return -EIO;
}
/* Enable bus mastering and memory mapped IO for the CX23418 */
pci_read_config_word(pci_dev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
pci_write_config_word(pci_dev, PCI_COMMAND, cmd);
pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &cx->card_rev);
pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &pci_latency);
if (pci_latency < 64 && cx18_pci_latency) {
CX18_INFO("Unreasonably low latency timer, "
"setting to 64 (was %d)\n", pci_latency);
pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, 64);
pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &pci_latency);
}
CX18_DEBUG_INFO("cx%d (rev %d) at %02x:%02x.%x, "
"irq: %d, latency: %d, memory: 0x%lx\n",
cx->pci_dev->device, cx->card_rev, pci_dev->bus->number,
PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn),
cx->pci_dev->irq, pci_latency, (unsigned long)cx->base_addr);
return 0;
}
static void cx18_init_subdevs(struct cx18 *cx)
{
u32 hw = cx->card->hw_all;
u32 device;
int i;
for (i = 0, device = 1; i < 32; i++, device <<= 1) {
if (!(device & hw))
continue;
switch (device) {
case CX18_HW_DVB:
case CX18_HW_TVEEPROM:
/* These subordinate devices do not use probing */
cx->hw_flags |= device;
break;
case CX18_HW_418_AV:
/* The A/V decoder gets probed earlier to set PLLs */
/* Just note that the card uses it (i.e. has analog) */
cx->hw_flags |= device;
break;
case CX18_HW_GPIO_RESET_CTRL:
/*
* The Reset Controller gets probed and added to
* hw_flags earlier for i2c adapter/bus initialization
*/
break;
case CX18_HW_GPIO_MUX:
if (cx18_gpio_register(cx, device) == 0)
cx->hw_flags |= device;
break;
default:
if (cx18_i2c_register(cx, i) == 0)
cx->hw_flags |= device;
break;
}
}
if (cx->hw_flags & CX18_HW_418_AV)
cx->sd_av = cx18_find_hw(cx, CX18_HW_418_AV);
if (cx->card->hw_muxer != 0)
cx->sd_extmux = cx18_find_hw(cx, cx->card->hw_muxer);
}
static int __devinit cx18_probe(struct pci_dev *pci_dev,
const struct pci_device_id *pci_id)
{
int retval = 0;
int i;
u32 devtype;
struct cx18 *cx;
/* FIXME - module parameter arrays constrain max instances */
i = atomic_inc_return(&cx18_instance) - 1;
if (i >= CX18_MAX_CARDS) {
printk(KERN_ERR "cx18: cannot manage card %d, driver has a "
"limit of 0 - %d\n", i, CX18_MAX_CARDS - 1);
return -ENOMEM;
}
cx = kzalloc(sizeof(struct cx18), GFP_ATOMIC);
if (cx == NULL) {
printk(KERN_ERR "cx18: cannot manage card %d, out of memory\n",
i);
return -ENOMEM;
}
cx->pci_dev = pci_dev;
cx->instance = i;
retval = v4l2_device_register(&pci_dev->dev, &cx->v4l2_dev);
if (retval) {
printk(KERN_ERR "cx18: v4l2_device_register of card %d failed"
"\n", cx->instance);
kfree(cx);
return retval;
}
snprintf(cx->v4l2_dev.name, sizeof(cx->v4l2_dev.name), "cx18-%d",
cx->instance);
CX18_INFO("Initializing card %d\n", cx->instance);
cx18_process_options(cx);
if (cx->options.cardtype == -1) {
retval = -ENODEV;
goto err;
}
retval = cx18_init_struct1(cx);
if (retval)
goto err;
CX18_DEBUG_INFO("base addr: 0x%08x\n", cx->base_addr);
/* PCI Device Setup */
retval = cx18_setup_pci(cx, pci_dev, pci_id);
if (retval != 0)
goto free_workqueues;
/* map io memory */
CX18_DEBUG_INFO("attempting ioremap at 0x%08x len 0x%08x\n",
cx->base_addr + CX18_MEM_OFFSET, CX18_MEM_SIZE);
cx->enc_mem = ioremap_nocache(cx->base_addr + CX18_MEM_OFFSET,
CX18_MEM_SIZE);
if (!cx->enc_mem) {
CX18_ERR("ioremap failed, perhaps increasing __VMALLOC_RESERVE in page.h\n");
CX18_ERR("or disabling CONFIG_HIGHMEM4G into the kernel would help\n");
retval = -ENOMEM;
goto free_mem;
}
cx->reg_mem = cx->enc_mem + CX18_REG_OFFSET;
devtype = cx18_read_reg(cx, 0xC72028);
switch (devtype & 0xff000000) {
case 0xff000000:
CX18_INFO("cx23418 revision %08x (A)\n", devtype);
break;
case 0x01000000:
CX18_INFO("cx23418 revision %08x (B)\n", devtype);
break;
default:
CX18_INFO("cx23418 revision %08x (Unknown)\n", devtype);
break;
}
cx18_init_power(cx, 1);
cx18_init_memory(cx);
cx->scb = (struct cx18_scb __iomem *)(cx->enc_mem + SCB_OFFSET);
cx18_init_scb(cx);
cx18_gpio_init(cx);
/* Initialize integrated A/V decoder early to set PLLs, just in case */
retval = cx18_av_probe(cx);
if (retval) {
CX18_ERR("Could not register A/V decoder subdevice\n");
goto free_map;
}
cx18_call_hw(cx, CX18_HW_418_AV, core, init, 0);
/* Initialize GPIO Reset Controller to do chip resets during i2c init */
if (cx->card->hw_all & CX18_HW_GPIO_RESET_CTRL) {
if (cx18_gpio_register(cx, CX18_HW_GPIO_RESET_CTRL) != 0)
CX18_WARN("Could not register GPIO reset controller"
"subdevice; proceeding anyway.\n");
else
cx->hw_flags |= CX18_HW_GPIO_RESET_CTRL;
}
/* active i2c */
CX18_DEBUG_INFO("activating i2c...\n");
retval = init_cx18_i2c(cx);
if (retval) {
CX18_ERR("Could not initialize i2c\n");
goto free_map;
}
if (cx->card->hw_all & CX18_HW_TVEEPROM) {
/* Based on the model number the cardtype may be changed.
The PCI IDs are not always reliable. */
cx18_process_eeprom(cx);
}
if (cx->card->comment)
CX18_INFO("%s", cx->card->comment);
if (cx->card->v4l2_capabilities == 0) {
retval = -ENODEV;
goto free_i2c;
}
cx18_init_memory(cx);
cx18_init_scb(cx);
/* Register IRQ */
retval = request_irq(cx->pci_dev->irq, cx18_irq_handler,
IRQF_SHARED | IRQF_DISABLED,
cx->v4l2_dev.name, (void *)cx);
if (retval) {
CX18_ERR("Failed to register irq %d\n", retval);
goto free_i2c;
}
if (cx->std == 0)
cx->std = V4L2_STD_NTSC_M;
if (cx->options.tuner == -1) {
for (i = 0; i < CX18_CARD_MAX_TUNERS; i++) {
if ((cx->std & cx->card->tuners[i].std) == 0)
continue;
cx->options.tuner = cx->card->tuners[i].tuner;
break;
}
}
/* if no tuner was found, then pick the first tuner in the card list */
if (cx->options.tuner == -1 && cx->card->tuners[0].std) {
cx->std = cx->card->tuners[0].std;
if (cx->std & V4L2_STD_PAL)
cx->std = V4L2_STD_PAL_BG | V4L2_STD_PAL_H;
else if (cx->std & V4L2_STD_NTSC)
cx->std = V4L2_STD_NTSC_M;
else if (cx->std & V4L2_STD_SECAM)
cx->std = V4L2_STD_SECAM_L;
cx->options.tuner = cx->card->tuners[0].tuner;
}
if (cx->options.radio == -1)
cx->options.radio = (cx->card->radio_input.audio_type != 0);
/* The card is now fully identified, continue with card-specific
initialization. */
cx18_init_struct2(cx);
cx18_init_subdevs(cx);
if (cx->std & V4L2_STD_525_60)
cx->is_60hz = 1;
else
cx->is_50hz = 1;
cx->params.video_gop_size = cx->is_60hz ? 15 : 12;
if (cx->options.radio > 0)
cx->v4l2_cap |= V4L2_CAP_RADIO;
if (cx->options.tuner > -1) {
struct tuner_setup setup;
setup.addr = ADDR_UNSET;
setup.type = cx->options.tuner;
setup.mode_mask = T_ANALOG_TV; /* matches TV tuners */
setup.tuner_callback = (setup.type == TUNER_XC2028) ?
cx18_reset_tuner_gpio : NULL;
cx18_call_all(cx, tuner, s_type_addr, &setup);
if (setup.type == TUNER_XC2028) {
static struct xc2028_ctrl ctrl = {
.fname = XC2028_DEFAULT_FIRMWARE,
.max_len = 64,
};
struct v4l2_priv_tun_config cfg = {
.tuner = cx->options.tuner,
.priv = &ctrl,
};
cx18_call_all(cx, tuner, s_config, &cfg);
}
}
/* The tuner is fixed to the standard. The other inputs (e.g. S-Video)
are not. */
cx->tuner_std = cx->std;
retval = cx18_streams_setup(cx);
if (retval) {
CX18_ERR("Error %d setting up streams\n", retval);
goto free_irq;
}
retval = cx18_streams_register(cx);
if (retval) {
CX18_ERR("Error %d registering devices\n", retval);
goto free_streams;
}
CX18_INFO("Initialized card: %s\n", cx->card_name);
return 0;
free_streams:
cx18_streams_cleanup(cx, 1);
free_irq:
free_irq(cx->pci_dev->irq, (void *)cx);
free_i2c:
exit_cx18_i2c(cx);
free_map:
cx18_iounmap(cx);
free_mem:
release_mem_region(cx->base_addr, CX18_MEM_SIZE);
free_workqueues:
destroy_workqueue(cx->in_work_queue);
destroy_workqueue(cx->out_work_queue);
err:
if (retval == 0)
retval = -ENODEV;
CX18_ERR("Error %d on initialization\n", retval);
v4l2_device_unregister(&cx->v4l2_dev);
kfree(cx);
return retval;
}
int cx18_init_on_first_open(struct cx18 *cx)
{
int video_input;
int fw_retry_count = 3;
struct v4l2_frequency vf;
struct cx18_open_id fh;
fh.cx = cx;
if (test_bit(CX18_F_I_FAILED, &cx->i_flags))
return -ENXIO;
if (test_and_set_bit(CX18_F_I_INITED, &cx->i_flags))
return 0;
while (--fw_retry_count > 0) {
/* load firmware */
if (cx18_firmware_init(cx) == 0)
break;
if (fw_retry_count > 1)
CX18_WARN("Retry loading firmware\n");
}
if (fw_retry_count == 0) {
set_bit(CX18_F_I_FAILED, &cx->i_flags);
return -ENXIO;
}
set_bit(CX18_F_I_LOADED_FW, &cx->i_flags);
/*
* Init the firmware twice to work around a silicon bug
* with the digital TS.
*
* The second firmware load requires us to normalize the APU state,
* or the audio for the first analog capture will be badly incorrect.
*
* I can't seem to call APU_RESETAI and have it succeed without the
* APU capturing audio, so we start and stop it here to do the reset
*/
/* MPEG Encoding, 224 kbps, MPEG Layer II, 48 ksps */
cx18_vapi(cx, CX18_APU_START, 2, CX18_APU_ENCODING_METHOD_MPEG|0xb9, 0);
cx18_vapi(cx, CX18_APU_RESETAI, 0);
cx18_vapi(cx, CX18_APU_STOP, 1, CX18_APU_ENCODING_METHOD_MPEG);
fw_retry_count = 3;
while (--fw_retry_count > 0) {
/* load firmware */
if (cx18_firmware_init(cx) == 0)
break;
if (fw_retry_count > 1)
CX18_WARN("Retry loading firmware\n");
}
if (fw_retry_count == 0) {
set_bit(CX18_F_I_FAILED, &cx->i_flags);
return -ENXIO;
}
/*
* The second firmware load requires us to normalize the APU state,
* or the audio for the first analog capture will be badly incorrect.
*
* I can't seem to call APU_RESETAI and have it succeed without the
* APU capturing audio, so we start and stop it here to do the reset
*/
/* MPEG Encoding, 224 kbps, MPEG Layer II, 48 ksps */
cx18_vapi(cx, CX18_APU_START, 2, CX18_APU_ENCODING_METHOD_MPEG|0xb9, 0);
cx18_vapi(cx, CX18_APU_RESETAI, 0);
cx18_vapi(cx, CX18_APU_STOP, 1, CX18_APU_ENCODING_METHOD_MPEG);
/* Init the A/V decoder, if it hasn't been already */
v4l2_subdev_call(cx->sd_av, core, load_fw);
vf.tuner = 0;
vf.type = V4L2_TUNER_ANALOG_TV;
vf.frequency = 6400; /* the tuner 'baseline' frequency */
/* Set initial frequency. For PAL/SECAM broadcasts no
'default' channel exists AFAIK. */
if (cx->std == V4L2_STD_NTSC_M_JP)
vf.frequency = 1460; /* ch. 1 91250*16/1000 */
else if (cx->std & V4L2_STD_NTSC_M)
vf.frequency = 1076; /* ch. 4 67250*16/1000 */
video_input = cx->active_input;
cx->active_input++; /* Force update of input */
cx18_s_input(NULL, &fh, video_input);
/* Let the VIDIOC_S_STD ioctl do all the work, keeps the code
in one place. */
cx->std++; /* Force full standard initialization */
cx18_s_std(NULL, &fh, &cx->tuner_std);
cx18_s_frequency(NULL, &fh, &vf);
return 0;
}
static void cx18_cancel_in_work_orders(struct cx18 *cx)
{
int i;
for (i = 0; i < CX18_MAX_IN_WORK_ORDERS; i++)
cancel_work_sync(&cx->in_work_order[i].work);
}
static void cx18_cancel_out_work_orders(struct cx18 *cx)
{
int i;
for (i = 0; i < CX18_MAX_STREAMS; i++)
if (&cx->streams[i].video_dev != NULL)
cancel_work_sync(&cx->streams[i].out_work_order);
}
static void cx18_remove(struct pci_dev *pci_dev)
{
struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
struct cx18 *cx = to_cx18(v4l2_dev);
int i;
CX18_DEBUG_INFO("Removing Card\n");
/* Stop all captures */
CX18_DEBUG_INFO("Stopping all streams\n");
if (atomic_read(&cx->tot_capturing) > 0)
cx18_stop_all_captures(cx);
/* Stop interrupts that cause incoming work to be queued */
cx18_sw1_irq_disable(cx, IRQ_CPU_TO_EPU | IRQ_APU_TO_EPU);
/* Incoming work can cause outgoing work, so clean up incoming first */
cx18_cancel_in_work_orders(cx);
cx18_cancel_out_work_orders(cx);
/* Stop ack interrupts that may have been needed for work to finish */
cx18_sw2_irq_disable(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);
cx18_halt_firmware(cx);
destroy_workqueue(cx->in_work_queue);
destroy_workqueue(cx->out_work_queue);
cx18_streams_cleanup(cx, 1);
exit_cx18_i2c(cx);
free_irq(cx->pci_dev->irq, (void *)cx);
cx18_iounmap(cx);
release_mem_region(cx->base_addr, CX18_MEM_SIZE);
pci_disable_device(cx->pci_dev);
if (cx->vbi.sliced_mpeg_data[0] != NULL)
for (i = 0; i < CX18_VBI_FRAMES; i++)
kfree(cx->vbi.sliced_mpeg_data[i]);
CX18_INFO("Removed %s\n", cx->card_name);
v4l2_device_unregister(v4l2_dev);
kfree(cx);
}
/* define a pci_driver for card detection */
static struct pci_driver cx18_pci_driver = {
.name = "cx18",
.id_table = cx18_pci_tbl,
.probe = cx18_probe,
.remove = cx18_remove,
};
static int __init module_start(void)
{
printk(KERN_INFO "cx18: Start initialization, version %s\n", CX18_VERSION);
/* Validate parameters */
if (cx18_first_minor < 0 || cx18_first_minor >= CX18_MAX_CARDS) {
printk(KERN_ERR "cx18: Exiting, cx18_first_minor must be between 0 and %d\n",
CX18_MAX_CARDS - 1);
return -1;
}
if (cx18_debug < 0 || cx18_debug > 511) {
cx18_debug = 0;
printk(KERN_INFO "cx18: Debug value must be >= 0 and <= 511!\n");
}
if (pci_register_driver(&cx18_pci_driver)) {
printk(KERN_ERR "cx18: Error detecting PCI card\n");
return -ENODEV;
}
printk(KERN_INFO "cx18: End initialization\n");
return 0;
}
static void __exit module_cleanup(void)
{
pci_unregister_driver(&cx18_pci_driver);
}
module_init(module_start);
module_exit(module_cleanup);
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