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linux-stable/drivers/media/video/cx88/cx88-core.c
Marton Balint e878cf3a47 V4L/DVB (11394): cx88: Add support for stereo and sap detection for A2 
The patch implements reliable stereo and sap detection for the A2 sound
standard.  This is achieved by processing the samples of the audio RDS fifo of
the cx2388x chip. A2M, EIAJ and BTSC stereo/sap detection is also possible with
this new approach, but it's not implemented yet. Stereo detection when alsa
handles the sound also does not work yet.

Signed-off-by: Marton Balint <cus@fazekas.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-06-16 19:14:17 -03:00

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/*
*
* device driver for Conexant 2388x based TV cards
* driver core
*
* (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
*
* (c) 2005-2006 Mauro Carvalho Chehab <mchehab@infradead.org>
* - Multituner support
* - video_ioctl2 conversion
* - PAL/M fixes
*
* 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/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/sound.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/mutex.h>
#include "cx88.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
MODULE_DESCRIPTION("v4l2 driver module for cx2388x based TV cards");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");
/* ------------------------------------------------------------------ */
static unsigned int core_debug;
module_param(core_debug,int,0644);
MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
static unsigned int nicam;
module_param(nicam,int,0644);
MODULE_PARM_DESC(nicam,"tv audio is nicam");
static unsigned int nocomb;
module_param(nocomb,int,0644);
MODULE_PARM_DESC(nocomb,"disable comb filter");
#define dprintk(level,fmt, arg...) if (core_debug >= level) \
printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
static unsigned int cx88_devcount;
static LIST_HEAD(cx88_devlist);
static DEFINE_MUTEX(devlist);
#define NO_SYNC_LINE (-1U)
/* @lpi: lines per IRQ, or 0 to not generate irqs. Note: IRQ to be
generated _after_ lpi lines are transferred. */
static __le32* cx88_risc_field(__le32 *rp, struct scatterlist *sglist,
unsigned int offset, u32 sync_line,
unsigned int bpl, unsigned int padding,
unsigned int lines, unsigned int lpi)
{
struct scatterlist *sg;
unsigned int line,todo,sol;
/* sync instruction */
if (sync_line != NO_SYNC_LINE)
*(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
/* scan lines */
sg = sglist;
for (line = 0; line < lines; line++) {
while (offset && offset >= sg_dma_len(sg)) {
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|sol|RISC_EOL|bpl);
*(rp++)=cpu_to_le32(sg_dma_address(sg)+offset);
offset+=bpl;
} else {
/* scanline needs to be split */
todo = bpl;
*(rp++)=cpu_to_le32(RISC_WRITE|sol|
(sg_dma_len(sg)-offset));
*(rp++)=cpu_to_le32(sg_dma_address(sg)+offset);
todo -= (sg_dma_len(sg)-offset);
offset = 0;
sg++;
while (todo > sg_dma_len(sg)) {
*(rp++)=cpu_to_le32(RISC_WRITE|
sg_dma_len(sg));
*(rp++)=cpu_to_le32(sg_dma_address(sg));
todo -= sg_dma_len(sg);
sg++;
}
*(rp++)=cpu_to_le32(RISC_WRITE|RISC_EOL|todo);
*(rp++)=cpu_to_le32(sg_dma_address(sg));
offset += todo;
}
offset += padding;
}
return rp;
}
int cx88_risc_buffer(struct pci_dev *pci, struct btcx_riscmem *risc,
struct scatterlist *sglist,
unsigned int top_offset, unsigned int bottom_offset,
unsigned int bpl, unsigned int padding, unsigned int lines)
{
u32 instructions,fields;
__le32 *rp;
int rc;
fields = 0;
if (UNSET != top_offset)
fields++;
if (UNSET != bottom_offset)
fields++;
/* estimate risc mem: worst case is one write per page border +
one write per scan line + syncs + jump (all 2 dwords). Padding
can cause next bpl to start close to a page border. First DMA
region may be smaller than PAGE_SIZE */
instructions = fields * (1 + ((bpl + padding) * lines) / PAGE_SIZE + lines);
instructions += 2;
if ((rc = btcx_riscmem_alloc(pci,risc,instructions*8)) < 0)
return rc;
/* write risc instructions */
rp = risc->cpu;
if (UNSET != top_offset)
rp = cx88_risc_field(rp, sglist, top_offset, 0,
bpl, padding, lines, 0);
if (UNSET != bottom_offset)
rp = cx88_risc_field(rp, sglist, bottom_offset, 0x200,
bpl, padding, lines, 0);
/* save pointer to jmp instruction address */
risc->jmp = rp;
BUG_ON((risc->jmp - risc->cpu + 2) * sizeof (*risc->cpu) > risc->size);
return 0;
}
int cx88_risc_databuffer(struct pci_dev *pci, struct btcx_riscmem *risc,
struct scatterlist *sglist, unsigned int bpl,
unsigned int lines, unsigned int lpi)
{
u32 instructions;
__le32 *rp;
int rc;
/* estimate risc mem: worst case is one write per page border +
one write per scan line + syncs + jump (all 2 dwords). Here
there is no padding and no sync. First DMA region may be smaller
than PAGE_SIZE */
instructions = 1 + (bpl * lines) / PAGE_SIZE + lines;
instructions += 1;
if ((rc = btcx_riscmem_alloc(pci,risc,instructions*8)) < 0)
return rc;
/* write risc instructions */
rp = risc->cpu;
rp = cx88_risc_field(rp, sglist, 0, NO_SYNC_LINE, bpl, 0, lines, lpi);
/* save pointer to jmp instruction address */
risc->jmp = rp;
BUG_ON((risc->jmp - risc->cpu + 2) * sizeof (*risc->cpu) > risc->size);
return 0;
}
int cx88_risc_stopper(struct pci_dev *pci, struct btcx_riscmem *risc,
u32 reg, u32 mask, u32 value)
{
__le32 *rp;
int rc;
if ((rc = btcx_riscmem_alloc(pci, risc, 4*16)) < 0)
return rc;
/* write risc instructions */
rp = risc->cpu;
*(rp++) = cpu_to_le32(RISC_WRITECR | RISC_IRQ2 | RISC_IMM);
*(rp++) = cpu_to_le32(reg);
*(rp++) = cpu_to_le32(value);
*(rp++) = cpu_to_le32(mask);
*(rp++) = cpu_to_le32(RISC_JUMP);
*(rp++) = cpu_to_le32(risc->dma);
return 0;
}
void
cx88_free_buffer(struct videobuf_queue *q, struct cx88_buffer *buf)
{
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
BUG_ON(in_interrupt());
videobuf_waiton(&buf->vb,0,0);
videobuf_dma_unmap(q, dma);
videobuf_dma_free(dma);
btcx_riscmem_free(to_pci_dev(q->dev), &buf->risc);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
/* ------------------------------------------------------------------ */
/* our SRAM memory layout */
/* we are going to put all thr risc programs into host memory, so we
* can use the whole SDRAM for the DMA fifos. To simplify things, we
* use a static memory layout. That surely will waste memory in case
* we don't use all DMA channels at the same time (which will be the
* case most of the time). But that still gives us enough FIFO space
* to be able to deal with insane long pci latencies ...
*
* FIFO space allocations:
* channel 21 (y video) - 10.0k
* channel 22 (u video) - 2.0k
* channel 23 (v video) - 2.0k
* channel 24 (vbi) - 4.0k
* channels 25+26 (audio) - 4.0k
* channel 28 (mpeg) - 4.0k
* channel 27 (audio rds)- 3.0k
* TOTAL = 29.0k
*
* Every channel has 160 bytes control data (64 bytes instruction
* queue and 6 CDT entries), which is close to 2k total.
*
* Address layout:
* 0x0000 - 0x03ff CMDs / reserved
* 0x0400 - 0x0bff instruction queues + CDs
* 0x0c00 - FIFOs
*/
struct sram_channel cx88_sram_channels[] = {
[SRAM_CH21] = {
.name = "video y / packed",
.cmds_start = 0x180040,
.ctrl_start = 0x180400,
.cdt = 0x180400 + 64,
.fifo_start = 0x180c00,
.fifo_size = 0x002800,
.ptr1_reg = MO_DMA21_PTR1,
.ptr2_reg = MO_DMA21_PTR2,
.cnt1_reg = MO_DMA21_CNT1,
.cnt2_reg = MO_DMA21_CNT2,
},
[SRAM_CH22] = {
.name = "video u",
.cmds_start = 0x180080,
.ctrl_start = 0x1804a0,
.cdt = 0x1804a0 + 64,
.fifo_start = 0x183400,
.fifo_size = 0x000800,
.ptr1_reg = MO_DMA22_PTR1,
.ptr2_reg = MO_DMA22_PTR2,
.cnt1_reg = MO_DMA22_CNT1,
.cnt2_reg = MO_DMA22_CNT2,
},
[SRAM_CH23] = {
.name = "video v",
.cmds_start = 0x1800c0,
.ctrl_start = 0x180540,
.cdt = 0x180540 + 64,
.fifo_start = 0x183c00,
.fifo_size = 0x000800,
.ptr1_reg = MO_DMA23_PTR1,
.ptr2_reg = MO_DMA23_PTR2,
.cnt1_reg = MO_DMA23_CNT1,
.cnt2_reg = MO_DMA23_CNT2,
},
[SRAM_CH24] = {
.name = "vbi",
.cmds_start = 0x180100,
.ctrl_start = 0x1805e0,
.cdt = 0x1805e0 + 64,
.fifo_start = 0x184400,
.fifo_size = 0x001000,
.ptr1_reg = MO_DMA24_PTR1,
.ptr2_reg = MO_DMA24_PTR2,
.cnt1_reg = MO_DMA24_CNT1,
.cnt2_reg = MO_DMA24_CNT2,
},
[SRAM_CH25] = {
.name = "audio from",
.cmds_start = 0x180140,
.ctrl_start = 0x180680,
.cdt = 0x180680 + 64,
.fifo_start = 0x185400,
.fifo_size = 0x001000,
.ptr1_reg = MO_DMA25_PTR1,
.ptr2_reg = MO_DMA25_PTR2,
.cnt1_reg = MO_DMA25_CNT1,
.cnt2_reg = MO_DMA25_CNT2,
},
[SRAM_CH26] = {
.name = "audio to",
.cmds_start = 0x180180,
.ctrl_start = 0x180720,
.cdt = 0x180680 + 64, /* same as audio IN */
.fifo_start = 0x185400, /* same as audio IN */
.fifo_size = 0x001000, /* same as audio IN */
.ptr1_reg = MO_DMA26_PTR1,
.ptr2_reg = MO_DMA26_PTR2,
.cnt1_reg = MO_DMA26_CNT1,
.cnt2_reg = MO_DMA26_CNT2,
},
[SRAM_CH28] = {
.name = "mpeg",
.cmds_start = 0x180200,
.ctrl_start = 0x1807C0,
.cdt = 0x1807C0 + 64,
.fifo_start = 0x186400,
.fifo_size = 0x001000,
.ptr1_reg = MO_DMA28_PTR1,
.ptr2_reg = MO_DMA28_PTR2,
.cnt1_reg = MO_DMA28_CNT1,
.cnt2_reg = MO_DMA28_CNT2,
},
[SRAM_CH27] = {
.name = "audio rds",
.cmds_start = 0x1801C0,
.ctrl_start = 0x180860,
.cdt = 0x180860 + 64,
.fifo_start = 0x187400,
.fifo_size = 0x000C00,
.ptr1_reg = MO_DMA27_PTR1,
.ptr2_reg = MO_DMA27_PTR2,
.cnt1_reg = MO_DMA27_CNT1,
.cnt2_reg = MO_DMA27_CNT2,
},
};
int cx88_sram_channel_setup(struct cx88_core *core,
struct sram_channel *ch,
unsigned int bpl, u32 risc)
{
unsigned int i,lines;
u32 cdt;
bpl = (bpl + 7) & ~7; /* alignment */
cdt = ch->cdt;
lines = ch->fifo_size / bpl;
if (lines > 6)
lines = 6;
BUG_ON(lines < 2);
/* write CDT */
for (i = 0; i < lines; i++)
cx_write(cdt + 16*i, ch->fifo_start + bpl*i);
/* write CMDS */
cx_write(ch->cmds_start + 0, risc);
cx_write(ch->cmds_start + 4, cdt);
cx_write(ch->cmds_start + 8, (lines*16) >> 3);
cx_write(ch->cmds_start + 12, ch->ctrl_start);
cx_write(ch->cmds_start + 16, 64 >> 2);
for (i = 20; i < 64; i += 4)
cx_write(ch->cmds_start + i, 0);
/* fill registers */
cx_write(ch->ptr1_reg, ch->fifo_start);
cx_write(ch->ptr2_reg, cdt);
cx_write(ch->cnt1_reg, (bpl >> 3) -1);
cx_write(ch->cnt2_reg, (lines*16) >> 3);
dprintk(2,"sram setup %s: bpl=%d lines=%d\n", ch->name, bpl, lines);
return 0;
}
/* ------------------------------------------------------------------ */
/* debug helper code */
static int cx88_risc_decode(u32 risc)
{
static char *instr[16] = {
[ RISC_SYNC >> 28 ] = "sync",
[ RISC_WRITE >> 28 ] = "write",
[ RISC_WRITEC >> 28 ] = "writec",
[ RISC_READ >> 28 ] = "read",
[ RISC_READC >> 28 ] = "readc",
[ RISC_JUMP >> 28 ] = "jump",
[ RISC_SKIP >> 28 ] = "skip",
[ RISC_WRITERM >> 28 ] = "writerm",
[ RISC_WRITECM >> 28 ] = "writecm",
[ RISC_WRITECR >> 28 ] = "writecr",
};
static int incr[16] = {
[ RISC_WRITE >> 28 ] = 2,
[ RISC_JUMP >> 28 ] = 2,
[ RISC_WRITERM >> 28 ] = 3,
[ RISC_WRITECM >> 28 ] = 3,
[ RISC_WRITECR >> 28 ] = 4,
};
static char *bits[] = {
"12", "13", "14", "resync",
"cnt0", "cnt1", "18", "19",
"20", "21", "22", "23",
"irq1", "irq2", "eol", "sol",
};
int i;
printk("0x%08x [ %s", risc,
instr[risc >> 28] ? instr[risc >> 28] : "INVALID");
for (i = ARRAY_SIZE(bits)-1; i >= 0; i--)
if (risc & (1 << (i + 12)))
printk(" %s",bits[i]);
printk(" count=%d ]\n", risc & 0xfff);
return incr[risc >> 28] ? incr[risc >> 28] : 1;
}
void cx88_sram_channel_dump(struct cx88_core *core,
struct sram_channel *ch)
{
static char *name[] = {
"initial risc",
"cdt base",
"cdt size",
"iq base",
"iq size",
"risc pc",
"iq wr ptr",
"iq rd ptr",
"cdt current",
"pci target",
"line / byte",
};
u32 risc;
unsigned int i,j,n;
printk("%s: %s - dma channel status dump\n",
core->name,ch->name);
for (i = 0; i < ARRAY_SIZE(name); i++)
printk("%s: cmds: %-12s: 0x%08x\n",
core->name,name[i],
cx_read(ch->cmds_start + 4*i));
for (n = 1, i = 0; i < 4; i++) {
risc = cx_read(ch->cmds_start + 4 * (i+11));
printk("%s: risc%d: ", core->name, i);
if (--n)
printk("0x%08x [ arg #%d ]\n", risc, n);
else
n = cx88_risc_decode(risc);
}
for (i = 0; i < 16; i += n) {
risc = cx_read(ch->ctrl_start + 4 * i);
printk("%s: iq %x: ", core->name, i);
n = cx88_risc_decode(risc);
for (j = 1; j < n; j++) {
risc = cx_read(ch->ctrl_start + 4 * (i+j));
printk("%s: iq %x: 0x%08x [ arg #%d ]\n",
core->name, i+j, risc, j);
}
}
printk("%s: fifo: 0x%08x -> 0x%x\n",
core->name, ch->fifo_start, ch->fifo_start+ch->fifo_size);
printk("%s: ctrl: 0x%08x -> 0x%x\n",
core->name, ch->ctrl_start, ch->ctrl_start+6*16);
printk("%s: ptr1_reg: 0x%08x\n",
core->name,cx_read(ch->ptr1_reg));
printk("%s: ptr2_reg: 0x%08x\n",
core->name,cx_read(ch->ptr2_reg));
printk("%s: cnt1_reg: 0x%08x\n",
core->name,cx_read(ch->cnt1_reg));
printk("%s: cnt2_reg: 0x%08x\n",
core->name,cx_read(ch->cnt2_reg));
}
static char *cx88_pci_irqs[32] = {
"vid", "aud", "ts", "vip", "hst", "5", "6", "tm1",
"src_dma", "dst_dma", "risc_rd_err", "risc_wr_err",
"brdg_err", "src_dma_err", "dst_dma_err", "ipb_dma_err",
"i2c", "i2c_rack", "ir_smp", "gpio0", "gpio1"
};
void cx88_print_irqbits(char *name, char *tag, char **strings,
int len, u32 bits, u32 mask)
{
unsigned int i;
printk(KERN_DEBUG "%s: %s [0x%x]", name, tag, bits);
for (i = 0; i < len; i++) {
if (!(bits & (1 << i)))
continue;
if (strings[i])
printk(" %s", strings[i]);
else
printk(" %d", i);
if (!(mask & (1 << i)))
continue;
printk("*");
}
printk("\n");
}
/* ------------------------------------------------------------------ */
int cx88_core_irq(struct cx88_core *core, u32 status)
{
int handled = 0;
if (status & PCI_INT_IR_SMPINT) {
cx88_ir_irq(core);
handled++;
}
if (!handled)
cx88_print_irqbits(core->name, "irq pci",
cx88_pci_irqs, ARRAY_SIZE(cx88_pci_irqs),
status, core->pci_irqmask);
return handled;
}
void cx88_wakeup(struct cx88_core *core,
struct cx88_dmaqueue *q, u32 count)
{
struct cx88_buffer *buf;
int bc;
for (bc = 0;; bc++) {
if (list_empty(&q->active))
break;
buf = list_entry(q->active.next,
struct cx88_buffer, vb.queue);
/* count comes from the hw and is is 16bit wide --
* this trick handles wrap-arounds correctly for
* up to 32767 buffers in flight... */
if ((s16) (count - buf->count) < 0)
break;
do_gettimeofday(&buf->vb.ts);
dprintk(2,"[%p/%d] wakeup reg=%d buf=%d\n",buf,buf->vb.i,
count, buf->count);
buf->vb.state = VIDEOBUF_DONE;
list_del(&buf->vb.queue);
wake_up(&buf->vb.done);
}
if (list_empty(&q->active)) {
del_timer(&q->timeout);
} else {
mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
}
if (bc != 1)
dprintk(2, "%s: %d buffers handled (should be 1)\n",
__func__, bc);
}
void cx88_shutdown(struct cx88_core *core)
{
/* disable RISC controller + IRQs */
cx_write(MO_DEV_CNTRL2, 0);
/* stop dma transfers */
cx_write(MO_VID_DMACNTRL, 0x0);
cx_write(MO_AUD_DMACNTRL, 0x0);
cx_write(MO_TS_DMACNTRL, 0x0);
cx_write(MO_VIP_DMACNTRL, 0x0);
cx_write(MO_GPHST_DMACNTRL, 0x0);
/* stop interrupts */
cx_write(MO_PCI_INTMSK, 0x0);
cx_write(MO_VID_INTMSK, 0x0);
cx_write(MO_AUD_INTMSK, 0x0);
cx_write(MO_TS_INTMSK, 0x0);
cx_write(MO_VIP_INTMSK, 0x0);
cx_write(MO_GPHST_INTMSK, 0x0);
/* stop capturing */
cx_write(VID_CAPTURE_CONTROL, 0);
}
int cx88_reset(struct cx88_core *core)
{
dprintk(1,"%s\n",__func__);
cx88_shutdown(core);
/* clear irq status */
cx_write(MO_VID_INTSTAT, 0xFFFFFFFF); // Clear PIV int
cx_write(MO_PCI_INTSTAT, 0xFFFFFFFF); // Clear PCI int
cx_write(MO_INT1_STAT, 0xFFFFFFFF); // Clear RISC int
/* wait a bit */
msleep(100);
/* init sram */
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH21], 720*4, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH22], 128, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH23], 128, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH24], 128, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], 128, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], 128, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28], 188*4, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH27], 128, 0);
/* misc init ... */
cx_write(MO_INPUT_FORMAT, ((1 << 13) | // agc enable
(1 << 12) | // agc gain
(1 << 11) | // adaptibe agc
(0 << 10) | // chroma agc
(0 << 9) | // ckillen
(7)));
/* setup image format */
cx_andor(MO_COLOR_CTRL, 0x4000, 0x4000);
/* setup FIFO Threshholds */
cx_write(MO_PDMA_STHRSH, 0x0807);
cx_write(MO_PDMA_DTHRSH, 0x0807);
/* fixes flashing of image */
cx_write(MO_AGC_SYNC_TIP1, 0x0380000F);
cx_write(MO_AGC_BACK_VBI, 0x00E00555);
cx_write(MO_VID_INTSTAT, 0xFFFFFFFF); // Clear PIV int
cx_write(MO_PCI_INTSTAT, 0xFFFFFFFF); // Clear PCI int
cx_write(MO_INT1_STAT, 0xFFFFFFFF); // Clear RISC int
/* Reset on-board parts */
cx_write(MO_SRST_IO, 0);
msleep(10);
cx_write(MO_SRST_IO, 1);
return 0;
}
/* ------------------------------------------------------------------ */
static unsigned int inline norm_swidth(v4l2_std_id norm)
{
return (norm & (V4L2_STD_MN & ~V4L2_STD_PAL_Nc)) ? 754 : 922;
}
static unsigned int inline norm_hdelay(v4l2_std_id norm)
{
return (norm & (V4L2_STD_MN & ~V4L2_STD_PAL_Nc)) ? 135 : 186;
}
static unsigned int inline norm_vdelay(v4l2_std_id norm)
{
return (norm & V4L2_STD_625_50) ? 0x24 : 0x18;
}
static unsigned int inline norm_fsc8(v4l2_std_id norm)
{
if (norm & V4L2_STD_PAL_M)
return 28604892; // 3.575611 MHz
if (norm & (V4L2_STD_PAL_Nc))
return 28656448; // 3.582056 MHz
if (norm & V4L2_STD_NTSC) // All NTSC/M and variants
return 28636360; // 3.57954545 MHz +/- 10 Hz
/* SECAM have also different sub carrier for chroma,
but step_db and step_dr, at cx88_set_tvnorm already handles that.
The same FSC applies to PAL/BGDKIH, PAL/60, NTSC/4.43 and PAL/N
*/
return 35468950; // 4.43361875 MHz +/- 5 Hz
}
static unsigned int inline norm_htotal(v4l2_std_id norm)
{
unsigned int fsc4=norm_fsc8(norm)/2;
/* returns 4*FSC / vtotal / frames per seconds */
return (norm & V4L2_STD_625_50) ?
((fsc4+312)/625+12)/25 :
((fsc4+262)/525*1001+15000)/30000;
}
static unsigned int inline norm_vbipack(v4l2_std_id norm)
{
return (norm & V4L2_STD_625_50) ? 511 : 400;
}
int cx88_set_scale(struct cx88_core *core, unsigned int width, unsigned int height,
enum v4l2_field field)
{
unsigned int swidth = norm_swidth(core->tvnorm);
unsigned int sheight = norm_maxh(core->tvnorm);
u32 value;
dprintk(1,"set_scale: %dx%d [%s%s,%s]\n", width, height,
V4L2_FIELD_HAS_TOP(field) ? "T" : "",
V4L2_FIELD_HAS_BOTTOM(field) ? "B" : "",
v4l2_norm_to_name(core->tvnorm));
if (!V4L2_FIELD_HAS_BOTH(field))
height *= 2;
// recalc H delay and scale registers
value = (width * norm_hdelay(core->tvnorm)) / swidth;
value &= 0x3fe;
cx_write(MO_HDELAY_EVEN, value);
cx_write(MO_HDELAY_ODD, value);
dprintk(1,"set_scale: hdelay 0x%04x (width %d)\n", value,swidth);
value = (swidth * 4096 / width) - 4096;
cx_write(MO_HSCALE_EVEN, value);
cx_write(MO_HSCALE_ODD, value);
dprintk(1,"set_scale: hscale 0x%04x\n", value);
cx_write(MO_HACTIVE_EVEN, width);
cx_write(MO_HACTIVE_ODD, width);
dprintk(1,"set_scale: hactive 0x%04x\n", width);
// recalc V scale Register (delay is constant)
cx_write(MO_VDELAY_EVEN, norm_vdelay(core->tvnorm));
cx_write(MO_VDELAY_ODD, norm_vdelay(core->tvnorm));
dprintk(1,"set_scale: vdelay 0x%04x\n", norm_vdelay(core->tvnorm));
value = (0x10000 - (sheight * 512 / height - 512)) & 0x1fff;
cx_write(MO_VSCALE_EVEN, value);
cx_write(MO_VSCALE_ODD, value);
dprintk(1,"set_scale: vscale 0x%04x\n", value);
cx_write(MO_VACTIVE_EVEN, sheight);
cx_write(MO_VACTIVE_ODD, sheight);
dprintk(1,"set_scale: vactive 0x%04x\n", sheight);
// setup filters
value = 0;
value |= (1 << 19); // CFILT (default)
if (core->tvnorm & V4L2_STD_SECAM) {
value |= (1 << 15);
value |= (1 << 16);
}
if (INPUT(core->input).type == CX88_VMUX_SVIDEO)
value |= (1 << 13) | (1 << 5);
if (V4L2_FIELD_INTERLACED == field)
value |= (1 << 3); // VINT (interlaced vertical scaling)
if (width < 385)
value |= (1 << 0); // 3-tap interpolation
if (width < 193)
value |= (1 << 1); // 5-tap interpolation
if (nocomb)
value |= (3 << 5); // disable comb filter
cx_write(MO_FILTER_EVEN, value);
cx_write(MO_FILTER_ODD, value);
dprintk(1,"set_scale: filter 0x%04x\n", value);
return 0;
}
static const u32 xtal = 28636363;
static int set_pll(struct cx88_core *core, int prescale, u32 ofreq)
{
static u32 pre[] = { 0, 0, 0, 3, 2, 1 };
u64 pll;
u32 reg;
int i;
if (prescale < 2)
prescale = 2;
if (prescale > 5)
prescale = 5;
pll = ofreq * 8 * prescale * (u64)(1 << 20);
do_div(pll,xtal);
reg = (pll & 0x3ffffff) | (pre[prescale] << 26);
if (((reg >> 20) & 0x3f) < 14) {
printk("%s/0: pll out of range\n",core->name);
return -1;
}
dprintk(1,"set_pll: MO_PLL_REG 0x%08x [old=0x%08x,freq=%d]\n",
reg, cx_read(MO_PLL_REG), ofreq);
cx_write(MO_PLL_REG, reg);
for (i = 0; i < 100; i++) {
reg = cx_read(MO_DEVICE_STATUS);
if (reg & (1<<2)) {
dprintk(1,"pll locked [pre=%d,ofreq=%d]\n",
prescale,ofreq);
return 0;
}
dprintk(1,"pll not locked yet, waiting ...\n");
msleep(10);
}
dprintk(1,"pll NOT locked [pre=%d,ofreq=%d]\n",prescale,ofreq);
return -1;
}
int cx88_start_audio_dma(struct cx88_core *core)
{
/* constant 128 made buzz in analog Nicam-stereo for bigger fifo_size */
int bpl = cx88_sram_channels[SRAM_CH25].fifo_size/4;
int rds_bpl = cx88_sram_channels[SRAM_CH27].fifo_size/AUD_RDS_LINES;
/* If downstream RISC is enabled, bail out; ALSA is managing DMA */
if (cx_read(MO_AUD_DMACNTRL) & 0x10)
return 0;
/* setup fifo + format */
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], bpl, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], bpl, 0);
cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH27],
rds_bpl, 0);
cx_write(MO_AUDD_LNGTH, bpl); /* fifo bpl size */
cx_write(MO_AUDR_LNGTH, rds_bpl); /* fifo bpl size */
/* enable Up, Down and Audio RDS fifo */
cx_write(MO_AUD_DMACNTRL, 0x0007);
return 0;
}
int cx88_stop_audio_dma(struct cx88_core *core)
{
/* If downstream RISC is enabled, bail out; ALSA is managing DMA */
if (cx_read(MO_AUD_DMACNTRL) & 0x10)
return 0;
/* stop dma */
cx_write(MO_AUD_DMACNTRL, 0x0000);
return 0;
}
static int set_tvaudio(struct cx88_core *core)
{
v4l2_std_id norm = core->tvnorm;
if (CX88_VMUX_TELEVISION != INPUT(core->input).type)
return 0;
if (V4L2_STD_PAL_BG & norm) {
core->tvaudio = WW_BG;
} else if (V4L2_STD_PAL_DK & norm) {
core->tvaudio = WW_DK;
} else if (V4L2_STD_PAL_I & norm) {
core->tvaudio = WW_I;
} else if (V4L2_STD_SECAM_L & norm) {
core->tvaudio = WW_L;
} else if ((V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H) & norm) {
core->tvaudio = WW_BG;
} else if (V4L2_STD_SECAM_DK & norm) {
core->tvaudio = WW_DK;
} else if ((V4L2_STD_NTSC_M & norm) ||
(V4L2_STD_PAL_M & norm)) {
core->tvaudio = WW_BTSC;
} else if (V4L2_STD_NTSC_M_JP & norm) {
core->tvaudio = WW_EIAJ;
} else {
printk("%s/0: tvaudio support needs work for this tv norm [%s], sorry\n",
core->name, v4l2_norm_to_name(core->tvnorm));
core->tvaudio = 0;
return 0;
}
cx_andor(MO_AFECFG_IO, 0x1f, 0x0);
cx88_set_tvaudio(core);
/* cx88_set_stereo(dev,V4L2_TUNER_MODE_STEREO); */
/*
This should be needed only on cx88-alsa. It seems that some cx88 chips have
bugs and does require DMA enabled for it to work.
*/
cx88_start_audio_dma(core);
return 0;
}
int cx88_set_tvnorm(struct cx88_core *core, v4l2_std_id norm)
{
u32 fsc8;
u32 adc_clock;
u32 vdec_clock;
u32 step_db,step_dr;
u64 tmp64;
u32 bdelay,agcdelay,htotal;
u32 cxiformat, cxoformat;
core->tvnorm = norm;
fsc8 = norm_fsc8(norm);
adc_clock = xtal;
vdec_clock = fsc8;
step_db = fsc8;
step_dr = fsc8;
if (norm & V4L2_STD_NTSC_M_JP) {
cxiformat = VideoFormatNTSCJapan;
cxoformat = 0x181f0008;
} else if (norm & V4L2_STD_NTSC_443) {
cxiformat = VideoFormatNTSC443;
cxoformat = 0x181f0008;
} else if (norm & V4L2_STD_PAL_M) {
cxiformat = VideoFormatPALM;
cxoformat = 0x1c1f0008;
} else if (norm & V4L2_STD_PAL_N) {
cxiformat = VideoFormatPALN;
cxoformat = 0x1c1f0008;
} else if (norm & V4L2_STD_PAL_Nc) {
cxiformat = VideoFormatPALNC;
cxoformat = 0x1c1f0008;
} else if (norm & V4L2_STD_PAL_60) {
cxiformat = VideoFormatPAL60;
cxoformat = 0x181f0008;
} else if (norm & V4L2_STD_NTSC) {
cxiformat = VideoFormatNTSC;
cxoformat = 0x181f0008;
} else if (norm & V4L2_STD_SECAM) {
step_db = 4250000 * 8;
step_dr = 4406250 * 8;
cxiformat = VideoFormatSECAM;
cxoformat = 0x181f0008;
} else { /* PAL */
cxiformat = VideoFormatPAL;
cxoformat = 0x181f0008;
}
dprintk(1,"set_tvnorm: \"%s\" fsc8=%d adc=%d vdec=%d db/dr=%d/%d\n",
v4l2_norm_to_name(core->tvnorm), fsc8, adc_clock, vdec_clock,
step_db, step_dr);
set_pll(core,2,vdec_clock);
dprintk(1,"set_tvnorm: MO_INPUT_FORMAT 0x%08x [old=0x%08x]\n",
cxiformat, cx_read(MO_INPUT_FORMAT) & 0x0f);
/* Chroma AGC must be disabled if SECAM is used, we enable it
by default on PAL and NTSC */
cx_andor(MO_INPUT_FORMAT, 0x40f,
norm & V4L2_STD_SECAM ? cxiformat : cxiformat | 0x400);
// FIXME: as-is from DScaler
dprintk(1,"set_tvnorm: MO_OUTPUT_FORMAT 0x%08x [old=0x%08x]\n",
cxoformat, cx_read(MO_OUTPUT_FORMAT));
cx_write(MO_OUTPUT_FORMAT, cxoformat);
// MO_SCONV_REG = adc clock / video dec clock * 2^17
tmp64 = adc_clock * (u64)(1 << 17);
do_div(tmp64, vdec_clock);
dprintk(1,"set_tvnorm: MO_SCONV_REG 0x%08x [old=0x%08x]\n",
(u32)tmp64, cx_read(MO_SCONV_REG));
cx_write(MO_SCONV_REG, (u32)tmp64);
// MO_SUB_STEP = 8 * fsc / video dec clock * 2^22
tmp64 = step_db * (u64)(1 << 22);
do_div(tmp64, vdec_clock);
dprintk(1,"set_tvnorm: MO_SUB_STEP 0x%08x [old=0x%08x]\n",
(u32)tmp64, cx_read(MO_SUB_STEP));
cx_write(MO_SUB_STEP, (u32)tmp64);
// MO_SUB_STEP_DR = 8 * 4406250 / video dec clock * 2^22
tmp64 = step_dr * (u64)(1 << 22);
do_div(tmp64, vdec_clock);
dprintk(1,"set_tvnorm: MO_SUB_STEP_DR 0x%08x [old=0x%08x]\n",
(u32)tmp64, cx_read(MO_SUB_STEP_DR));
cx_write(MO_SUB_STEP_DR, (u32)tmp64);
// bdelay + agcdelay
bdelay = vdec_clock * 65 / 20000000 + 21;
agcdelay = vdec_clock * 68 / 20000000 + 15;
dprintk(1,"set_tvnorm: MO_AGC_BURST 0x%08x [old=0x%08x,bdelay=%d,agcdelay=%d]\n",
(bdelay << 8) | agcdelay, cx_read(MO_AGC_BURST), bdelay, agcdelay);
cx_write(MO_AGC_BURST, (bdelay << 8) | agcdelay);
// htotal
tmp64 = norm_htotal(norm) * (u64)vdec_clock;
do_div(tmp64, fsc8);
htotal = (u32)tmp64 | (HLNotchFilter4xFsc << 11);
dprintk(1,"set_tvnorm: MO_HTOTAL 0x%08x [old=0x%08x,htotal=%d]\n",
htotal, cx_read(MO_HTOTAL), (u32)tmp64);
cx_write(MO_HTOTAL, htotal);
// vbi stuff, set vbi offset to 10 (for 20 Clk*2 pixels), this makes
// the effective vbi offset ~244 samples, the same as the Bt8x8
cx_write(MO_VBI_PACKET, (10<<11) | norm_vbipack(norm));
// this is needed as well to set all tvnorm parameter
cx88_set_scale(core, 320, 240, V4L2_FIELD_INTERLACED);
// audio
set_tvaudio(core);
// tell i2c chips
call_all(core, core, s_std, norm);
// done
return 0;
}
/* ------------------------------------------------------------------ */
struct video_device *cx88_vdev_init(struct cx88_core *core,
struct pci_dev *pci,
struct video_device *template,
char *type)
{
struct video_device *vfd;
vfd = video_device_alloc();
if (NULL == vfd)
return NULL;
*vfd = *template;
vfd->v4l2_dev = &core->v4l2_dev;
vfd->parent = &pci->dev;
vfd->release = video_device_release;
snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)",
core->name, type, core->board.name);
return vfd;
}
struct cx88_core* cx88_core_get(struct pci_dev *pci)
{
struct cx88_core *core;
mutex_lock(&devlist);
list_for_each_entry(core, &cx88_devlist, devlist) {
if (pci->bus->number != core->pci_bus)
continue;
if (PCI_SLOT(pci->devfn) != core->pci_slot)
continue;
if (0 != cx88_get_resources(core, pci)) {
mutex_unlock(&devlist);
return NULL;
}
atomic_inc(&core->refcount);
mutex_unlock(&devlist);
return core;
}
core = cx88_core_create(pci, cx88_devcount);
if (NULL != core) {
cx88_devcount++;
list_add_tail(&core->devlist, &cx88_devlist);
}
mutex_unlock(&devlist);
return core;
}
void cx88_core_put(struct cx88_core *core, struct pci_dev *pci)
{
release_mem_region(pci_resource_start(pci,0),
pci_resource_len(pci,0));
if (!atomic_dec_and_test(&core->refcount))
return;
mutex_lock(&devlist);
cx88_ir_fini(core);
if (0 == core->i2c_rc) {
if (core->i2c_rtc)
i2c_unregister_device(core->i2c_rtc);
i2c_del_adapter(&core->i2c_adap);
}
list_del(&core->devlist);
iounmap(core->lmmio);
cx88_devcount--;
mutex_unlock(&devlist);
v4l2_device_unregister(&core->v4l2_dev);
kfree(core);
}
/* ------------------------------------------------------------------ */
EXPORT_SYMBOL(cx88_print_irqbits);
EXPORT_SYMBOL(cx88_core_irq);
EXPORT_SYMBOL(cx88_wakeup);
EXPORT_SYMBOL(cx88_reset);
EXPORT_SYMBOL(cx88_shutdown);
EXPORT_SYMBOL(cx88_risc_buffer);
EXPORT_SYMBOL(cx88_risc_databuffer);
EXPORT_SYMBOL(cx88_risc_stopper);
EXPORT_SYMBOL(cx88_free_buffer);
EXPORT_SYMBOL(cx88_sram_channels);
EXPORT_SYMBOL(cx88_sram_channel_setup);
EXPORT_SYMBOL(cx88_sram_channel_dump);
EXPORT_SYMBOL(cx88_set_tvnorm);
EXPORT_SYMBOL(cx88_set_scale);
EXPORT_SYMBOL(cx88_vdev_init);
EXPORT_SYMBOL(cx88_core_get);
EXPORT_SYMBOL(cx88_core_put);
EXPORT_SYMBOL(cx88_ir_start);
EXPORT_SYMBOL(cx88_ir_stop);
/*
* Local variables:
* c-basic-offset: 8
* End:
* kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
*/
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