--- /dev/null
+/*
+ *
+ * Support for CX23885 analog audio capture
+ *
+ * (c) 2008 Mijhail Moreyra <mijhail.moreyra@gmail.com>
+ * Adapted from cx88-alsa.c
+ * (c) 2009 Steven Toth <stoth@kernellabs.com>
+ *
+ * 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 <linux/vmalloc.h>
+#include <linux/dma-mapping.h>
+#include <linux/pci.h>
+
+#include <asm/delay.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+
+#include <sound/tlv.h>
+
+
+#include "cx23885.h"
+#include "cx23885-reg.h"
+
+#define AUDIO_SRAM_CHANNEL SRAM_CH07
+
+#define dprintk(level, fmt, arg...) if (audio_debug >= level) \
+ printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg)
+
+#define dprintk_core(level, fmt, arg...) if (audio_debug >= level) \
+ printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg)
+
+/****************************************************************************
+ Module global static vars
+ ****************************************************************************/
+
+static unsigned int disable_analog_audio;
+module_param(disable_analog_audio, int, 0644);
+MODULE_PARM_DESC(disable_analog_audio, "disable analog audio ALSA driver");
+
+static unsigned int audio_debug;
+module_param(audio_debug, int, 0644);
+MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]");
+
+/****************************************************************************
+ Board specific funtions
+ ****************************************************************************/
+
+/* Constants taken from cx88-reg.h */
+#define AUD_INT_DN_RISCI1 (1 << 0)
+#define AUD_INT_UP_RISCI1 (1 << 1)
+#define AUD_INT_RDS_DN_RISCI1 (1 << 2)
+#define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */
+#define AUD_INT_UP_RISCI2 (1 << 5)
+#define AUD_INT_RDS_DN_RISCI2 (1 << 6)
+#define AUD_INT_DN_SYNC (1 << 12)
+#define AUD_INT_UP_SYNC (1 << 13)
+#define AUD_INT_RDS_DN_SYNC (1 << 14)
+#define AUD_INT_OPC_ERR (1 << 16)
+#define AUD_INT_BER_IRQ (1 << 20)
+#define AUD_INT_MCHG_IRQ (1 << 21)
+#define GP_COUNT_CONTROL_RESET 0x3
+
+/*
+ * BOARD Specific: Sets audio DMA
+ */
+
+static int cx23885_start_audio_dma(struct cx23885_audio_dev *chip)
+{
+ struct cx23885_audio_buffer *buf = chip->buf;
+ struct cx23885_dev *dev = chip->dev;
+ struct sram_channel *audio_ch =
+ &dev->sram_channels[AUDIO_SRAM_CHANNEL];
+
+ dprintk(1, "%s()\n", __func__);
+
+ /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
+ cx_clear(AUD_INT_DMA_CTL, 0x11);
+
+ /* setup fifo + format - out channel */
+ cx23885_sram_channel_setup(chip->dev, audio_ch, buf->bpl,
+ buf->risc.dma);
+
+ /* sets bpl size */
+ cx_write(AUD_INT_A_LNGTH, buf->bpl);
+
+ /* This is required to get good audio (1 seems to be ok) */
+ cx_write(AUD_INT_A_MODE, 1);
+
+ /* reset counter */
+ cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
+ atomic_set(&chip->count, 0);
+
+ dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
+ "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start+12)>>1,
+ chip->num_periods, buf->bpl * chip->num_periods);
+
+ /* Enables corresponding bits at AUD_INT_STAT */
+ cx_write(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
+ AUD_INT_DN_RISCI1);
+
+ /* Clean any pending interrupt bits already set */
+ cx_write(AUDIO_INT_INT_STAT, ~0);
+
+ /* enable audio irqs */
+ cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
+
+ /* start dma */
+ cx_set(DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
+ cx_set(AUD_INT_DMA_CTL, 0x11); /* audio downstream FIFO and
+ RISC enable */
+ if (audio_debug)
+ cx23885_sram_channel_dump(chip->dev, audio_ch);
+
+ return 0;
+}
+
+/*
+ * BOARD Specific: Resets audio DMA
+ */
+static int cx23885_stop_audio_dma(struct cx23885_audio_dev *chip)
+{
+ struct cx23885_dev *dev = chip->dev;
+ dprintk(1, "Stopping audio DMA\n");
+
+ /* stop dma */
+ cx_clear(AUD_INT_DMA_CTL, 0x11);
+
+ /* disable irqs */
+ cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
+ cx_clear(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
+ AUD_INT_DN_RISCI1);
+
+ if (audio_debug)
+ cx23885_sram_channel_dump(chip->dev,
+ &dev->sram_channels[AUDIO_SRAM_CHANNEL]);
+
+ return 0;
+}
+
+/*
+ * BOARD Specific: Handles audio IRQ
+ */
+int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask)
+{
+ struct cx23885_audio_dev *chip = dev->audio_dev;
+
+ if (0 == (status & mask))
+ return 0;
+
+ cx_write(AUDIO_INT_INT_STAT, status);
+
+ /* risc op code error */
+ if (status & AUD_INT_OPC_ERR) {
+ printk(KERN_WARNING "%s/1: Audio risc op code error\n",
+ dev->name);
+ cx_clear(AUD_INT_DMA_CTL, 0x11);
+ cx23885_sram_channel_dump(dev,
+ &dev->sram_channels[AUDIO_SRAM_CHANNEL]);
+ }
+ if (status & AUD_INT_DN_SYNC) {
+ dprintk(1, "Downstream sync error\n");
+ cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
+ return 1;
+ }
+ /* risc1 downstream */
+ if (status & AUD_INT_DN_RISCI1) {
+ atomic_set(&chip->count, cx_read(AUD_INT_A_GPCNT));
+ snd_pcm_period_elapsed(chip->substream);
+ }
+ /* FIXME: Any other status should deserve a special handling? */
+
+ return 1;
+}
+
+static int dsp_buffer_free(struct cx23885_audio_dev *chip)
+{
+ BUG_ON(!chip->dma_size);
+
+ dprintk(2, "Freeing buffer\n");
+ videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
+ videobuf_dma_free(chip->dma_risc);
+ btcx_riscmem_free(chip->pci, &chip->buf->risc);
+ kfree(chip->buf);
+
+ chip->dma_risc = NULL;
+ chip->dma_size = 0;
+
+ return 0;
+}
+
+/****************************************************************************
+ ALSA PCM Interface
+ ****************************************************************************/
+
+/*
+ * Digital hardware definition
+ */
+#define DEFAULT_FIFO_SIZE 4096
+
+static struct snd_pcm_hardware snd_cx23885_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 = 2,
+ .channels_max = 2,
+ /* Analog audio output will be full of clicks and pops if there
+ are not exactly four lines in the SRAM FIFO buffer. */
+ .period_bytes_min = DEFAULT_FIFO_SIZE/4,
+ .period_bytes_max = DEFAULT_FIFO_SIZE/4,
+ .periods_min = 1,
+ .periods_max = 1024,
+ .buffer_bytes_max = (1024*1024),
+};
+
+/*
+ * audio pcm capture open callback
+ */
+static int snd_cx23885_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int err;
+
+ if (!chip) {
+ printk(KERN_ERR "BUG: cx23885 can't find device struct."
+ " Can't proceed with open\n");
+ return -ENODEV;
+ }
+
+ err = snd_pcm_hw_constraint_pow2(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (err < 0)
+ goto _error;
+
+ chip->substream = substream;
+
+ runtime->hw = snd_cx23885_digital_hw;
+
+ if (chip->dev->sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
+ DEFAULT_FIFO_SIZE) {
+ unsigned int bpl = chip->dev->
+ sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 4;
+ bpl &= ~7; /* must be multiple of 8 */
+ runtime->hw.period_bytes_min = bpl;
+ runtime->hw.period_bytes_max = bpl;
+ }
+
+ return 0;
+_error:
+ dprintk(1, "Error opening PCM!\n");
+ return err;
+}
+
+/*
+ * audio close callback
+ */
+static int snd_cx23885_close(struct snd_pcm_substream *substream)
+{
+ return 0;
+}
+
+/*
+ * hw_params callback
+ */
+static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
+ struct videobuf_dmabuf *dma;
+
+ struct cx23885_audio_buffer *buf;
+ int ret;
+
+ 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);
+ BUG_ON(chip->num_periods & (chip->num_periods-1));
+
+ buf = kzalloc(sizeof(*buf), GFP_KERNEL);
+ if (NULL == buf)
+ return -ENOMEM;
+
+ buf->bpl = chip->period_size;
+
+ dma = &buf->dma;
+ videobuf_dma_init(dma);
+ ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
+ (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
+ if (ret < 0)
+ goto error;
+
+ ret = videobuf_dma_map(&chip->pci->dev, dma);
+ if (ret < 0)
+ goto error;
+
+ ret = cx23885_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
+ chip->period_size, chip->num_periods, 1);
+ if (ret < 0)
+ goto error;
+
+ /* Loop back to start of program */
+ 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->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
+
+ chip->buf = buf;
+ chip->dma_risc = dma;
+
+ substream->runtime->dma_area = chip->dma_risc->vaddr;
+ substream->runtime->dma_bytes = chip->dma_size;
+ substream->runtime->dma_addr = 0;
+
+ return 0;
+
+error:
+ kfree(buf);
+ return ret;
+}
+
+/*
+ * hw free callback
+ */
+static int snd_cx23885_hw_free(struct snd_pcm_substream *substream)
+{
+
+ struct cx23885_audio_dev *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_cx23885_prepare(struct snd_pcm_substream *substream)
+{
+ return 0;
+}
+
+/*
+ * trigger callback
+ */
+static int snd_cx23885_card_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
+ int err;
+
+ /* Local interrupts are already disabled by ALSA */
+ spin_lock(&chip->lock);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ err = cx23885_start_audio_dma(chip);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ err = cx23885_stop_audio_dma(chip);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ spin_unlock(&chip->lock);
+
+ return err;
+}
+
+/*
+ * pointer callback
+ */
+static snd_pcm_uframes_t snd_cx23885_pointer(
+ struct snd_pcm_substream *substream)
+{
+ struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ u16 count;
+
+ count = atomic_read(&chip->count);
+
+ return runtime->period_size * (count & (runtime->periods-1));
+}
+
+/*
+ * page callback (needed for mmap)
+ */
+static struct page *snd_cx23885_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ void *pageptr = substream->runtime->dma_area + offset;
+ return vmalloc_to_page(pageptr);
+}
+
+/*
+ * operators
+ */
+static struct snd_pcm_ops snd_cx23885_pcm_ops = {
+ .open = snd_cx23885_pcm_open,
+ .close = snd_cx23885_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_cx23885_hw_params,
+ .hw_free = snd_cx23885_hw_free,
+ .prepare = snd_cx23885_prepare,
+ .trigger = snd_cx23885_card_trigger,
+ .pointer = snd_cx23885_pointer,
+ .page = snd_cx23885_page,
+};
+
+/*
+ * create a PCM device
+ */
+static int snd_cx23885_pcm(struct cx23885_audio_dev *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_cx23885_pcm_ops);
+
+ return 0;
+}
+
+/****************************************************************************
+ Basic Flow for Sound Devices
+ ****************************************************************************/
+
+/*
+ * Alsa Constructor - Component probe
+ */
+
+struct cx23885_audio_dev *cx23885_audio_initdev(struct cx23885_dev *dev)
+{
+ struct snd_card *card;
+ struct cx23885_audio_dev *chip;
+ int err;
+
+ if (disable_analog_audio)
+ return NULL;
+
+ if (dev->sram_channels[AUDIO_SRAM_CHANNEL].cmds_start == 0) {
+ printk(KERN_WARNING "%s(): Missing SRAM channel configuration "
+ "for analog TV Audio\n", __func__);
+ return NULL;
+ }
+
+ err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, sizeof(struct cx23885_audio_dev), &card);
+ if (err < 0)
+ goto error;
+
+ chip = (struct cx23885_audio_dev *) card->private_data;
+ chip->dev = dev;
+ chip->pci = dev->pci;
+ chip->card = card;
+ spin_lock_init(&chip->lock);
+
+ snd_card_set_dev(card, &dev->pci->dev);
+
+ err = snd_cx23885_pcm(chip, 0, "CX23885 Digital");
+ if (err < 0)
+ goto error;
+
+ strcpy(card->driver, "CX23885");
+ sprintf(card->shortname, "Conexant CX23885");
+ sprintf(card->longname, "%s at %s", card->shortname, dev->name);
+
+ err = snd_card_register(card);
+ if (err < 0)
+ goto error;
+
+ dprintk(0, "registered ALSA audio device\n");
+
+ return chip;
+
+error:
+ snd_card_free(card);
+ printk(KERN_ERR "%s(): Failed to register analog "
+ "audio adapter\n", __func__);
+
+ return NULL;
+}
+
+/*
+ * ALSA destructor
+ */
+void cx23885_audio_finidev(struct cx23885_dev *dev)
+{
+ struct cx23885_audio_dev *chip = dev->audio_dev;
+
+ snd_card_free(chip->card);
+}
},
[SRAM_CH07] = {
.name = "ch7",
- .cmds_start = 0x0,
- .ctrl_start = 0x0,
- .cdt = 0x0,
- .fifo_start = 0x0,
- .fifo_size = 0x0,
+ .name = "TV Audio",
+ .cmds_start = 0x10190,
+ .ctrl_start = 0x10480,
+ .cdt = 0x10a00,
+ .fifo_start = 0x7000,
+ .fifo_size = 0x1000,
.ptr1_reg = DMA6_PTR1,
.ptr2_reg = DMA6_PTR2,
.cnt1_reg = DMA6_CNT1,
static __le32 *cx23885_risc_field(__le32 *rp, struct scatterlist *sglist,
unsigned int offset, u32 sync_line,
unsigned int bpl, unsigned int padding,
- unsigned int lines)
+ unsigned int lines, unsigned int lpi)
{
struct scatterlist *sg;
- unsigned int line, todo;
+ unsigned int line, todo, sol;
/* sync instruction */
if (sync_line != NO_SYNC_LINE)
offset -= sg_dma_len(sg);
sg++;
}
+
+ if (lpi && line > 0 && !(line % lpi))
+ sol = RISC_SOL | RISC_IRQ1 | RISC_CNT_INC;
+ else
+ sol = RISC_SOL;
+
if (bpl <= sg_dma_len(sg)-offset) {
/* fits into current chunk */
- *(rp++) = cpu_to_le32(RISC_WRITE|RISC_SOL|RISC_EOL|bpl);
+ *(rp++) = cpu_to_le32(RISC_WRITE|sol|RISC_EOL|bpl);
*(rp++) = cpu_to_le32(sg_dma_address(sg)+offset);
*(rp++) = cpu_to_le32(0); /* bits 63-32 */
offset += bpl;
} else {
/* scanline needs to be split */
todo = bpl;
- *(rp++) = cpu_to_le32(RISC_WRITE|RISC_SOL|
+ *(rp++) = cpu_to_le32(RISC_WRITE|sol|
(sg_dma_len(sg)-offset));
*(rp++) = cpu_to_le32(sg_dma_address(sg)+offset);
*(rp++) = cpu_to_le32(0); /* bits 63-32 */
rp = risc->cpu;
if (UNSET != top_offset)
rp = cx23885_risc_field(rp, sglist, top_offset, 0,
- bpl, padding, lines);
+ bpl, padding, lines, 0);
if (UNSET != bottom_offset)
rp = cx23885_risc_field(rp, sglist, bottom_offset, 0x200,
- bpl, padding, lines);
+ bpl, padding, lines, 0);
/* save pointer to jmp instruction address */
risc->jmp = rp;
return 0;
}
-static int cx23885_risc_databuffer(struct pci_dev *pci,
+int cx23885_risc_databuffer(struct pci_dev *pci,
struct btcx_riscmem *risc,
struct scatterlist *sglist,
unsigned int bpl,
- unsigned int lines)
+ unsigned int lines, unsigned int lpi)
{
u32 instructions;
__le32 *rp;
/* write risc instructions */
rp = risc->cpu;
- rp = cx23885_risc_field(rp, sglist, 0, NO_SYNC_LINE, bpl, 0, lines);
+ rp = cx23885_risc_field(rp, sglist, 0, NO_SYNC_LINE,
+ bpl, 0, lines, lpi);
/* save pointer to jmp instruction address */
risc->jmp = rp;
goto fail;
cx23885_risc_databuffer(dev->pci, &buf->risc,
videobuf_to_dma(&buf->vb)->sglist,
- buf->vb.width, buf->vb.height);
+ buf->vb.width, buf->vb.height, 0);
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
struct cx23885_tsport *ts2 = &dev->ts2;
u32 pci_status, pci_mask;
u32 vida_status, vida_mask;
+ u32 audint_status, audint_mask;
u32 ts1_status, ts1_mask;
u32 ts2_status, ts2_mask;
int vida_count = 0, ts1_count = 0, ts2_count = 0, handled = 0;
+ int audint_count = 0;
bool subdev_handled;
pci_status = cx_read(PCI_INT_STAT);
pci_mask = cx23885_irq_get_mask(dev);
vida_status = cx_read(VID_A_INT_STAT);
vida_mask = cx_read(VID_A_INT_MSK);
+ audint_status = cx_read(AUDIO_INT_INT_STAT);
+ audint_mask = cx_read(AUDIO_INT_INT_MSK);
ts1_status = cx_read(VID_B_INT_STAT);
ts1_mask = cx_read(VID_B_INT_MSK);
ts2_status = cx_read(VID_C_INT_STAT);
goto out;
vida_count = cx_read(VID_A_GPCNT);
+ audint_count = cx_read(AUD_INT_A_GPCNT);
ts1_count = cx_read(ts1->reg_gpcnt);
ts2_count = cx_read(ts2->reg_gpcnt);
dprintk(7, "pci_status: 0x%08x pci_mask: 0x%08x\n",
pci_status, pci_mask);
dprintk(7, "vida_status: 0x%08x vida_mask: 0x%08x count: 0x%x\n",
vida_status, vida_mask, vida_count);
+ dprintk(7, "audint_status: 0x%08x audint_mask: 0x%08x count: 0x%x\n",
+ audint_status, audint_mask, audint_count);
dprintk(7, "ts1_status: 0x%08x ts1_mask: 0x%08x count: 0x%x\n",
ts1_status, ts1_mask, ts1_count);
dprintk(7, "ts2_status: 0x%08x ts2_mask: 0x%08x count: 0x%x\n",
if (vida_status)
handled += cx23885_video_irq(dev, vida_status);
+ if (audint_status)
+ handled += cx23885_audio_irq(dev, audint_status, audint_mask);
+
if (pci_status & PCI_MSK_IR) {
subdev_handled = false;
v4l2_subdev_call(dev->sd_ir, core, interrupt_service_routine,
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff