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OpenCloudOS-Kernel/drivers/media/video/cx88/cx88-alsa.c

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/*
*
* Support for audio capture
* PCI function #1 of the cx2388x.
*
* (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
* (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
* Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
* Based on dummy.c by Jaroslav Kysela <perex@suse.cz>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <asm/delay.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include <sound/initval.h>
#include "cx88.h"
#include "cx88-reg.h"
#define dprintk(level,fmt, arg...) if (debug >= level) \
printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)
#define dprintk_core(level,fmt, arg...) if (debug >= level) \
printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)
/****************************************************************************
Data type declarations - Can be moded to a header file later
****************************************************************************/
/* These can be replaced after done */
#define MIXER_ADDR_LAST MAX_CX88_INPUT
struct cx88_audio_dev {
struct cx88_core *core;
struct cx88_dmaqueue q;
/* pci i/o */
struct pci_dev *pci;
unsigned char pci_rev,pci_lat;
/* audio controls */
int irq;
struct snd_card *card;
spinlock_t reg_lock;
unsigned int dma_size;
unsigned int period_size;
unsigned int num_periods;
struct videobuf_dmabuf dma_risc;
int mixer_volume[MIXER_ADDR_LAST+1][2];
int capture_source[MIXER_ADDR_LAST+1][2];
long int read_count;
long int read_offset;
struct cx88_buffer *buf;
long opened;
struct snd_pcm_substream *substream;
};
typedef struct cx88_audio_dev snd_cx88_card_t;
/****************************************************************************
Module global static vars
****************************************************************************/
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
static struct snd_card *snd_cx88_cards[SNDRV_CARDS];
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");
/****************************************************************************
Module macros
****************************************************************************/
MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
MODULE_AUTHOR("Ricardo Cerqueira");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
"{{Conexant,23882},"
"{{Conexant,23883}");
static unsigned int debug;
module_param(debug,int,0644);
MODULE_PARM_DESC(debug,"enable debug messages");
/****************************************************************************
Module specific funtions
****************************************************************************/
/*
* BOARD Specific: Sets audio DMA
*/
static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
{
struct cx88_buffer *buf = chip->buf;
struct cx88_core *core=chip->core;
struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
dprintk(1, "Starting audio DMA for %i bytes/line and %i (%i) lines at address %08x\n",buf->bpl, chip->num_periods, audio_ch->fifo_size / buf->bpl, audio_ch->fifo_start);
/* setup fifo + format - out channel */
cx88_sram_channel_setup(chip->core, &cx88_sram_channels[SRAM_CH25],
buf->bpl, buf->risc.dma);
/* sets bpl size */
cx_write(MO_AUDD_LNGTH, buf->bpl);
/* reset counter */
cx_write(MO_AUDD_GPCNTRL,GP_COUNT_CONTROL_RESET);
dprintk(1,"Enabling IRQ, setting mask from 0x%x to 0x%x\n",chip->core->pci_irqmask,(chip->core->pci_irqmask | 0x02));
/* enable irqs */
cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | 0x02);
/* Enables corresponding bits at AUD_INT_STAT */
cx_write(MO_AUD_INTMSK,
(1<<16)|
(1<<12)|
(1<<4)|
(1<<0)
);
/* start dma */
cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */
if (debug)
cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
return 0;
}
/*
* BOARD Specific: Resets audio DMA
*/
static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
{
struct cx88_core *core=chip->core;
dprintk(1, "Stopping audio DMA\n");
/* stop dma */
cx_clear(MO_AUD_DMACNTRL, 0x11);
/* disable irqs */
cx_clear(MO_PCI_INTMSK, 0x02);
cx_clear(MO_AUD_INTMSK,
(1<<16)|
(1<<12)|
(1<<4)|
(1<<0)
);
if (debug)
cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);
return 0;
}
#define MAX_IRQ_LOOP 10
/*
* BOARD Specific: IRQ dma bits
*/
static char *cx88_aud_irqs[32] = {
"dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
NULL, /* reserved */
"dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
NULL, /* reserved */
"dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */
NULL, /* reserved */
"dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */
NULL, /* reserved */
"opc_err", "par_err", "rip_err", /* 16-18 */
"pci_abort", "ber_irq", "mchg_irq" /* 19-21 */
};
/*
* BOARD Specific: Threats IRQ audio specific calls
*/
static void cx8801_aud_irq(snd_cx88_card_t *chip)
{
struct cx88_core *core = chip->core;
u32 status, mask;
u32 count;
status = cx_read(MO_AUD_INTSTAT);
mask = cx_read(MO_AUD_INTMSK);
if (0 == (status & mask)) {
spin_unlock(&chip->reg_lock);
return;
}
cx_write(MO_AUD_INTSTAT, status);
if (debug > 1 || (status & mask & ~0xff))
cx88_print_irqbits(core->name, "irq aud",
cx88_aud_irqs, status, mask);
/* risc op code error */
if (status & (1 << 16)) {
printk(KERN_WARNING "%s/0: audio risc op code error\n",core->name);
cx_clear(MO_AUD_DMACNTRL, 0x11);
cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
}
/* risc1 downstream */
if (status & 0x01) {
spin_lock(&chip->reg_lock);
count = cx_read(MO_AUDD_GPCNT);
spin_unlock(&chip->reg_lock);
if (chip->read_count == 0)
chip->read_count += chip->dma_size;
}
if (chip->read_count >= chip->period_size) {
dprintk(2, "Elapsing period\n");
snd_pcm_period_elapsed(chip->substream);
}
dprintk(3,"Leaving audio IRQ handler...\n");
/* FIXME: Any other status should deserve a special handling? */
}
/*
* BOARD Specific: Handles IRQ calls
*/
static irqreturn_t cx8801_irq(int irq, void *dev_id)
{
snd_cx88_card_t *chip = dev_id;
struct cx88_core *core = chip->core;
u32 status;
int loop, handled = 0;
for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x02);
if (0 == status)
goto out;
dprintk( 3, "cx8801_irq\n" );
dprintk( 3, " loop: %d/%d\n", loop, MAX_IRQ_LOOP );
dprintk( 3, " status: %d\n", status );
handled = 1;
cx_write(MO_PCI_INTSTAT, status);
if (status & 0x02)
{
dprintk( 2, " ALSA IRQ handling\n" );
cx8801_aud_irq(chip);
}
};
if (MAX_IRQ_LOOP == loop) {
dprintk( 0, "clearing mask\n" );
dprintk(1,"%s/0: irq loop -- clearing mask\n",
core->name);
cx_clear(MO_PCI_INTMSK,0x02);
}
out:
return IRQ_RETVAL(handled);
}
static int dsp_buffer_free(snd_cx88_card_t *chip)
{
BUG_ON(!chip->dma_size);
dprintk(2,"Freeing buffer\n");
videobuf_pci_dma_unmap(chip->pci, &chip->dma_risc);
videobuf_dma_free(&chip->dma_risc);
btcx_riscmem_free(chip->pci,&chip->buf->risc);
kfree(chip->buf);
chip->dma_size = 0;
return 0;
}
/****************************************************************************
ALSA PCM Interface
****************************************************************************/
/*
* Digital hardware definition
*/
static struct snd_pcm_hardware snd_cx88_digital_hw = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (2*2048),
.period_bytes_min = 2048,
.period_bytes_max = 2048,
.periods_min = 2,
.periods_max = 2,
};
/*
* audio pcm capture runtime free
*/
static void snd_card_cx88_runtime_free(struct snd_pcm_runtime *runtime)
{
}
/*
* audio pcm capture open callback
*/
static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
if (test_and_set_bit(0, &chip->opened))
return -EBUSY;
err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
if (err < 0)
goto _error;
chip->substream = substream;
chip->read_count = 0;
chip->read_offset = 0;
runtime->private_free = snd_card_cx88_runtime_free;
runtime->hw = snd_cx88_digital_hw;
return 0;
_error:
dprintk(1,"Error opening PCM!\n");
clear_bit(0, &chip->opened);
smp_mb__after_clear_bit();
return err;
}
/*
* audio close callback
*/
static int snd_cx88_close(struct snd_pcm_substream *substream)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
clear_bit(0, &chip->opened);
smp_mb__after_clear_bit();
return 0;
}
/*
* hw_params callback
*/
static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
struct snd_pcm_hw_params * hw_params)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
struct cx88_buffer *buf;
if (substream->runtime->dma_area) {
dsp_buffer_free(chip);
substream->runtime->dma_area = NULL;
}
chip->period_size = params_period_bytes(hw_params);
chip->num_periods = params_periods(hw_params);
chip->dma_size = chip->period_size * params_periods(hw_params);
BUG_ON(!chip->dma_size);
dprintk(1,"Setting buffer\n");
buf = kmalloc(sizeof(*buf),GFP_KERNEL);
if (NULL == buf)
return -ENOMEM;
memset(buf,0,sizeof(*buf));
buf->vb.memory = V4L2_MEMORY_MMAP;
buf->vb.width = chip->period_size;
buf->vb.height = chip->num_periods;
buf->vb.size = chip->dma_size;
buf->vb.field = V4L2_FIELD_NONE;
videobuf_dma_init(&buf->vb.dma);
videobuf_dma_init_kernel(&buf->vb.dma,PCI_DMA_FROMDEVICE,
(PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
videobuf_pci_dma_map(chip->pci,&buf->vb.dma);
cx88_risc_databuffer(chip->pci, &buf->risc,
buf->vb.dma.sglist,
buf->vb.width, buf->vb.height);
buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
buf->vb.state = STATE_PREPARED;
buf->bpl = chip->period_size;
chip->buf = buf;
chip->dma_risc = buf->vb.dma;
dprintk(1,"Buffer ready at %u\n",chip->dma_risc.nr_pages);
substream->runtime->dma_area = chip->dma_risc.vmalloc;
return 0;
}
/*
* hw free callback
*/
static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
if (substream->runtime->dma_area) {
dsp_buffer_free(chip);
substream->runtime->dma_area = NULL;
}
return 0;
}
/*
* prepare callback
*/
static int snd_cx88_prepare(struct snd_pcm_substream *substream)
{
return 0;
}
/*
* trigger callback
*/
static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
int err;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
err=_cx88_start_audio_dma(chip);
break;
case SNDRV_PCM_TRIGGER_STOP:
err=_cx88_stop_audio_dma(chip);
break;
default:
err=-EINVAL;
break;
}
spin_unlock(&chip->reg_lock);
return err;
}
/*
* pointer callback
*/
static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
if (chip->read_count) {
chip->read_count -= snd_pcm_lib_period_bytes(substream);
chip->read_offset += snd_pcm_lib_period_bytes(substream);
if (chip->read_offset == chip->dma_size)
chip->read_offset = 0;
}
dprintk(2, "Pointer time, will return %li, read %li\n",chip->read_offset,chip->read_count);
return bytes_to_frames(runtime, chip->read_offset);
}
/*
* operators
*/
static struct snd_pcm_ops snd_cx88_pcm_ops = {
.open = snd_cx88_pcm_open,
.close = snd_cx88_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_cx88_hw_params,
.hw_free = snd_cx88_hw_free,
.prepare = snd_cx88_prepare,
.trigger = snd_cx88_card_trigger,
.pointer = snd_cx88_pointer,
};
/*
* create a PCM device
*/
static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
{
int err;
struct snd_pcm *pcm;
err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
if (err < 0)
return err;
pcm->private_data = chip;
strcpy(pcm->name, name);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);
return 0;
}
/****************************************************************************
CONTROL INTERFACE
****************************************************************************/
static int snd_cx88_capture_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *info)
{
info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
info->count = 1;
info->value.integer.min = 0;
info->value.integer.max = 0x3f;
return 0;
}
/* OK - TODO: test it */
static int snd_cx88_capture_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
struct cx88_core *core=chip->core;
value->value.integer.value[0] = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
return 0;
}
/* OK - TODO: test it */
static int snd_cx88_capture_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *value)
{
snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
struct cx88_core *core=chip->core;
int v;
u32 old_control;
spin_lock_irq(&chip->reg_lock);
old_control = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
v = 0x3f - (value->value.integer.value[0] & 0x3f);
cx_andor(AUD_VOL_CTL, 0x3f, v);
spin_unlock_irq(&chip->reg_lock);
return v != old_control;
}
static struct snd_kcontrol_new snd_cx88_capture_volume = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Capture Volume",
.info = snd_cx88_capture_volume_info,
.get = snd_cx88_capture_volume_get,
.put = snd_cx88_capture_volume_put,
};
/****************************************************************************
Basic Flow for Sound Devices
****************************************************************************/
/*
* PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
* Only boards with eeprom and byte 1 at eeprom=1 have it
*/
static struct pci_device_id cx88_audio_pci_tbl[] __devinitdata = {
{0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
{0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
{0, }
};
MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);
/*
* Chip-specific destructor
*/
static int snd_cx88_free(snd_cx88_card_t *chip)
{
if (chip->irq >= 0){
synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
}
cx88_core_put(chip->core,chip->pci);
pci_disable_device(chip->pci);
return 0;
}
/*
* Component Destructor
*/
static void snd_cx88_dev_free(struct snd_card * card)
{
snd_cx88_card_t *chip = card->private_data;
snd_cx88_free(chip);
}
/*
* Alsa Constructor - Component probe
*/
static int devno;
static int __devinit snd_cx88_create(struct snd_card *card,
struct pci_dev *pci,
snd_cx88_card_t **rchip)
{
snd_cx88_card_t *chip;
struct cx88_core *core;
int err;
*rchip = NULL;
err = pci_enable_device(pci);
if (err < 0)
return err;
pci_set_master(pci);
chip = (snd_cx88_card_t *) card->private_data;
core = cx88_core_get(pci);
if (NULL == core) {
err = -EINVAL;
kfree (chip);
return err;
}
if (!pci_dma_supported(pci,0xffffffff)) {
dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
err = -EIO;
cx88_core_put(core,pci);
return err;
}
/* pci init */
chip->card = card;
chip->pci = pci;
chip->irq = -1;
spin_lock_init(&chip->reg_lock);
chip->core = core;
/* get irq */
err = request_irq(chip->pci->irq, cx8801_irq,
IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
if (err < 0) {
dprintk(0, "%s: can't get IRQ %d\n",
chip->core->name, chip->pci->irq);
return err;
}
/* print pci info */
pci_read_config_byte(pci, PCI_CLASS_REVISION, &chip->pci_rev);
pci_read_config_byte(pci, PCI_LATENCY_TIMER, &chip->pci_lat);
dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
"latency: %d, mmio: 0x%llx\n", core->name, devno,
pci_name(pci), chip->pci_rev, pci->irq,
chip->pci_lat,(unsigned long long)pci_resource_start(pci,0));
chip->irq = pci->irq;
synchronize_irq(chip->irq);
snd_card_set_dev(card, &pci->dev);
*rchip = chip;
return 0;
}
static int __devinit cx88_audio_initdev(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
struct snd_card *card;
snd_cx88_card_t *chip;
int err;
if (devno >= SNDRV_CARDS)
return (-ENODEV);
if (!enable[devno]) {
++devno;
return (-ENOENT);
}
card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
if (!card)
return (-ENOMEM);
card->private_free = snd_cx88_dev_free;
err = snd_cx88_create(card, pci, &chip);
if (err < 0)
return (err);
err = snd_cx88_pcm(chip, 0, "CX88 Digital");
if (err < 0) {
snd_card_free(card);
return (err);
}
err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_capture_volume, chip));
if (err < 0) {
snd_card_free(card);
return (err);
}
strcpy (card->driver, "CX88x");
sprintf(card->shortname, "Conexant CX%x", pci->device);
sprintf(card->longname, "%s at %#llx",
card->shortname,(unsigned long long)pci_resource_start(pci, 0));
strcpy (card->mixername, "CX88");
dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
card->driver,devno);
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return (err);
}
snd_cx88_cards[devno] = card;
pci_set_drvdata(pci,card);
devno++;
return 0;
}
/*
* ALSA destructor
*/
static void __devexit cx88_audio_finidev(struct pci_dev *pci)
{
struct cx88_audio_dev *card = pci_get_drvdata(pci);
snd_card_free((void *)card);
pci_set_drvdata(pci, NULL);
devno--;
}
/*
* PCI driver definition
*/
static struct pci_driver cx88_audio_pci_driver = {
.name = "cx88_audio",
.id_table = cx88_audio_pci_tbl,
.probe = cx88_audio_initdev,
.remove = cx88_audio_finidev,
};
/****************************************************************************
LINUX MODULE INIT
****************************************************************************/
/*
* module init
*/
static int cx88_audio_init(void)
{
printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
(CX88_VERSION_CODE >> 16) & 0xff,
(CX88_VERSION_CODE >> 8) & 0xff,
CX88_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
#endif
return pci_register_driver(&cx88_audio_pci_driver);
}
/*
* module remove
*/
static void cx88_audio_fini(void)
{
pci_unregister_driver(&cx88_audio_pci_driver);
}
module_init(cx88_audio_init);
module_exit(cx88_audio_fini);
/* ----------------------------------------------------------- */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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