/*
* Driver for Bt848 TV tuner. WARNING, I used the Linux driver as
* documentation.
*
*/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
enum {
Qdir = 0,
Qdata,
Qctl,
Qregs,
Qdbuf,
Brooktree_vid = 0x109e,
Brooktree_848_did = 0x0350,
Intel_vid = 0x8086,
Intel_82437_did = 0x122d,
K = 1024,
M = K * K,
ntsc_rawpixels = 910,
ntsc_sqpixels = 780, // Including blanking & inactive
ntsc_hactive = 640,
ntsc_vactive = 480,
ntsc_clkx1delay = 135, // Clock ticks.
ntsc_clkx1hactive = 754,
ntsc_vdelay = 26, // # of scan lines.
ntsc_vscale = 0,
i2c_timing = 7 << 4,
i2c_bt848w3b = 1 << 2,
i2c_bt848scl = 1 << 1,
i2c_bt848sda = 1 << 0,
i2c_miroproee = 0x80, // MIRO PRO EEPROM
i2c_tea6300 = i2c_miroproee,
i2c_tda8425 = 0x82,
i2c_tda9840 = 0x84,
i2c_tda9850 = 0xb6,
i2c_haupee = 0xa0, // Hauppage EEPROM
i2c_stbee = 0xae, // STB EEPROM
Bt848_miropro = 0,
Bt848_miro,
// Bit fields.
iform_muxsel1 = 3 << 5, // 004
iform_muxsel0 = 2 << 5,
iform_xtselmask = 3 << 3,
iform_xtauto = 3 << 3,
iform_formatmask = 7 << 0,
iform_ntsc = 1 << 0,
control_ldec = 1 << 5, // 02C
contrast_100percent = 0xd8, // 030
vscale_interlaced = 1 << 5, // 04C
adelay_ntsc = 104, // 060
bdelay_ntsc = 93, // 064
adc_crush = 1 << 0, // 068
colorfmt_rgb16 = (2 << 4) | (2 << 0), // 0D4
colorctl_gamma = 1 << 4, // 0D8
capctl_fullframe = 1 << 4, // 0DC
capctl_captureodd = 1 << 1,
capctl_captureeven = 1 << 0,
vbipacksize = 0x190, // 0E0
intstat_i2crack = 1 << 25, // 100
intstat_scerr = 1 << 19,
intstat_ocerr = 1 << 18,
intstat_fbus = 1 << 12,
intstat_risci = 1 << 11,
intstat_i2cdone = 1 << 8,
intstat_vpress = 1 << 5,
intstat_hlock = 1 << 4,
intstat_vsync = 1 << 1,
intstat_fmtchg = 1 << 0,
intmask_etbf = 1 << 23, // 104
gpiodmactl_pltp23_16 = 2 << 6, // 10C
gpiodmactl_pltp23_0 = 0 << 6,
gpiodmactl_pltp1_16 = 2 << 4,
gpiodmactl_pltp1_0 = 0 << 4,
gpiodmactl_pktp_32 = 3 << 2,
gpiodmactl_pktp_0 = 0 << 2,
gpiodmactl_riscenable = 1 << 1,
gpiodmactl_fifoenable = 1 << 0,
// RISC instructions and parameters.
fifo_vre = 0x4,
fifo_vro = 0xC,
fifo_fm1 = 0x6,
riscirq = 1 << 24,
riscwrite = 0x1 << 28,
riscwrite_sol = 1 << 27,
riscwrite_eol = 1 << 26,
riscskip = 0x2 << 28,
riscjmp = 0x7 << 28,
riscsync = 0x8 << 28,
riscsync_resync = 1 << 15,
riscsync_vre = fifo_vre << 0,
riscsync_vro = fifo_vro << 0,
riscsync_fm1 = fifo_fm1 << 0,
};
typedef struct {
ushort vid;
ushort did;
char *name;
} Variant;
typedef struct {
ulong devstat; // 000
ulong iform; // 004
ulong tdec; // 008
ulong ecrop; // 00C
ulong evdelaylo; // 010
ulong evactivelo; // 014
ulong ehdelaylo; // 018
ulong ehactivelo; // 01C
ulong ehscalehi; // 020
ulong ehscalelo; // 024
ulong bright; // 028
ulong econtrol; // 02C
ulong contrastlo; // 030
ulong satulo; // 034
ulong satvlo; // 038
ulong hue; // 03C
ulong escloop; // 040
ulong pad0; // 044
ulong oform; // 048
ulong evscalehi; // 04C
ulong evscalelo; // 050
ulong test; // 054
ulong pad1[2]; // 058-05C
ulong adelay; // 060
ulong bdelay; // 064
ulong adc; // 068
ulong evtc; // 06C
ulong pad2[3]; // 070-078
ulong sreset; // 07C
ulong tglb; // 080
ulong tgctrl; // 084
ulong pad3; // 088
ulong ocrop; // 08C
ulong ovdelaylo; // 090
ulong ovactivelo; // 094
ulong ohdelaylo; // 098
ulong ohactivelo; // 09C
ulong ohscalehi; // 0A0
ulong ohscalelo; // 0A4
ulong pad4; // 0A8
ulong ocontrol; // 0AC
ulong pad5[4]; // 0B0-0BC
ulong oscloop; // 0C0
ulong pad6[2]; // 0C4-0C8
ulong ovscalehi; // 0CC
ulong ovscalelo; // 0D0
ulong colorfmt; // 0D4
ulong colorctl; // 0D8
ulong capctl; // 0DC
ulong vbipacksize; // 0E0
ulong vbipackdel; // 0E4
ulong fcap; // 0E8
ulong ovtc; // 0EC
ulong pllflo; // 0F0
ulong pllfhi; // 0F4
ulong pllxci; // 0F8
ulong dvsif; // 0FC
ulong intstat; // 100
ulong intmask; // 104
ulong pad7; // 108
ulong gpiodmactl; // 10C
ulong i2c; // 110
ulong riscstrtadd; // 114
ulong gpioouten; // 118
ulong gpioreginp; // 11C
ulong risccount; // 120
ulong pad8[55]; // 124-1FC
ulong gpiodata[64]; // 200-2FC
} Bt848;
typedef struct {
char *name;
ushort freq_vhfh; // Start frequency
ushort freq_uhf;
uchar VHF_L;
uchar VHF_H;
uchar UHF;
uchar cfg;
ushort offs;
} Tuner;
typedef struct {
Lock;
Bt848 *bt848;
Variant *variant;
Tuner *tuner;
Pcidev *pci;
ulong *program; // Current DMA program
uchar i2ctuneraddr;
uchar i2ccmd; // I2C command
int board; // What board is this?
uchar *dbuf;
} Tv;
// Tuner related.
enum {
TemicPAL = 0,
PhilipsPAL,
PhilipsNTSC,
PhilipsSECAM,
Notuner,
PhilipsPALI,
TemicNTSC,
TemicPALI,
Temic4036,
AlpsTSBH1,
AlpsTSBE1,
Freqmultiplier = 16,
};
static Tuner tuners[] = {
{"Temic PAL", Freqmultiplier * 140.25, Freqmultiplier * 463.25,
0x02, 0x04, 0x01, 0x8e, 623 },
{"Philips PAL_I", Freqmultiplier * 140.25, Freqmultiplier * 463.25,
0xa0, 0x90, 0x30, 0x8e, 623 },
{"Philips NTSC", Freqmultiplier * 157.25, Freqmultiplier * 451.25,
0xA0, 0x90, 0x30, 0x8e, 732 },
{"Philips SECAM", Freqmultiplier * 168.25, Freqmultiplier * 447.25,
0xA7, 0x97, 0x37, 0x8e, 623 },
{"NoTuner", 0, 0,
0x00, 0x00, 0x00, 0x00, 0 },
{"Philips PAL", Freqmultiplier * 168.25, Freqmultiplier * 447.25,
0xA0, 0x90, 0x30, 0x8e, 623 },
{"Temic NTSC", Freqmultiplier * 157.25, Freqmultiplier * 463.25,
0x02, 0x04, 0x01, 0x8e, 732 },
{"TEMIC PAL_I", Freqmultiplier * 170.00, Freqmultiplier * 450.00,
0x02, 0x04, 0x01, 0x8e, 623 },
{"Temic 4036 FY5 NTSC", Freqmultiplier * 157.25, Freqmultiplier * 463.25,
0xa0, 0x90, 0x30, 0x8e, 732 },
{"Alps TSBH1", Freqmultiplier * 137.25, Freqmultiplier * 385.25,
0x01, 0x02, 0x08, 0x8e, 732 },
{"Alps TSBE1", Freqmultiplier * 137.25, Freqmultiplier * 385.25,
0x01, 0x02, 0x08, 0x8e, 732 },
};
enum {
CMvstart,
CMvstop,
CMchannel,
};
static Cmdtab tvctlmsg[] = {
CMvstart, "vstart", 3,
CMvstop, "vstop", 1,
CMchannel, "channel", 3,
};
static Dirtab tvtab[]={
".", { Qdir, 0, QTDIR }, 0, DMDIR|0555,
"tv", { Qdata, 0 }, 0, 0600,
"tvctl", { Qctl, 0 }, 0, 0600,
"tvregs", { Qregs, 0 }, 0, 0400,
"tvdbuf", { Qdbuf, 0 }, 0, 0400,
};
static Variant variant[] = {
{ Brooktree_vid, Brooktree_848_did, "Brooktree 848 TV tuner", },
};
static char *boards[] = {
"MIRO PRO",
"MIRO",
};
static Tv *tv;
static int i2cread(Tv *, uchar, uchar *);
static int i2cwrite(Tv *, uchar, uchar, uchar, int);
static void tvinterrupt(Ureg *, Tv *);
static void vstart(Tv *, ulong, int);
static void vstop(Tv *);
static void frequency(Tv *, int, int);
static void
tvinit(void)
{
Pcidev *pci;
ulong intmask;
if (!getconf("tv0"))
return;
// Test for a triton memory controller.
intmask = 0;
if (pcimatch(nil, Intel_vid, Intel_82437_did))
intmask = intmask_etbf;
pci = nil;
while ((pci = pcimatch(pci, 0, 0)) != nil) {
int i, t;
Bt848 *bt848;
ushort hscale, hdelay;
uchar v;
for (i = 0; i != nelem(variant); i++)
if (pci->vid == variant[i].vid && pci->did == variant[i].did)
break;
if (i == nelem(variant))
continue;
if (tv) {
print("#V: Currently there is only support for one TV, ignoring %s\n",
variant[i].name);
continue;
}
tv = (Tv *)malloc(sizeof(Tv));
assert(tv);
tv->variant = &variant[i];
tv->pci = pci;
tv->bt848 = (Bt848 *)upamalloc(pci->mem[0].bar & ~0x0F, 4 * K, K);
if (tv->bt848 == nil)
panic("#V: Cannot allocate memory for Bt848\n");
bt848 = tv->bt848;
// i2c stuff.
if (pci->did >= 878)
tv->i2ccmd = 0x83;
else
tv->i2ccmd = i2c_timing | i2c_bt848scl | i2c_bt848sda;
{
bt848->gpioouten = 0;
bt848->gpioouten |= 1 << 5;
bt848->gpiodata[0] |= 1 << 5;
microdelay(2500);
bt848->gpiodata[0] |= 1 << 5;
microdelay(2500);
}
if (i2cread(tv, i2c_haupee, &v))
panic("#V: Cannot deal with hauppauge boards\n");
if (i2cread(tv, i2c_stbee, &v))
panic("#V: Cannot deal with STB cards\n");
if (i2cread(tv, i2c_miroproee, &v)) {
tv->board = Bt848_miropro;
t = ((bt848->gpiodata[0] >> 10) - 1) & 7;
}
else {
tv->board = Bt848_miro;
t = ((bt848->gpiodata[0] >> 10) - 1) & 7;
}
if (t >= nelem(tuners))
t = 4;
tv->tuner = &tuners[t];
tv->i2ctuneraddr =
i2cread(tv, 0xc1, &v)? 0xc0:
i2cread(tv, 0xc3, &v)? 0xc2:
i2cread(tv, 0xc5, &v)? 0xc4:
i2cread(tv, 0xc7, &v)? 0xc6: -1;
bt848->capctl = capctl_fullframe;
bt848->adelay = adelay_ntsc;
bt848->bdelay = bdelay_ntsc;
bt848->iform = iform_muxsel0|iform_xtauto|iform_ntsc;
bt848->vbipacksize = vbipacksize & 0xff;
bt848->vbipackdel = (vbipacksize >> 8) & 1;
// setpll(bt848);
bt848->colorfmt = colorfmt_rgb16;
hscale = (ntsc_rawpixels * 4096) / ntsc_sqpixels - 4096;
hdelay = (ntsc_clkx1delay * ntsc_hactive) / ntsc_clkx1hactive;
bt848->ovtc = bt848->evtc = 0;
bt848->ehscalehi = bt848->ohscalehi = (hscale >> 8) & 0xff;
bt848->ehscalelo = bt848->ohscalelo = hscale & 0xff;
bt848->evscalehi &= ~0x1f;
bt848->ovscalehi &= ~0x1f;
bt848->evscalehi |= vscale_interlaced | ((ntsc_vscale >> 8) & 0x1f);
bt848->ovscalehi |= vscale_interlaced | (ntsc_vscale >> 8) & 0x1f;
bt848->evscalelo = bt848->ovscalelo = ntsc_vscale & 0xff;
bt848->ehactivelo = bt848->ohactivelo = ntsc_hactive & 0xff;
bt848->ehdelaylo = bt848->ohdelaylo = hdelay & 0xff;
bt848->evactivelo = bt848->ovactivelo = ntsc_vactive & 0xff;
bt848->evdelaylo = bt848->ovdelaylo = ntsc_vdelay & 0xff;
bt848->ecrop = bt848->ocrop =
((ntsc_hactive >> 8) & 0x03) |
((hdelay >> 6) & 0x0C) |
((ntsc_vactive >> 4) & 0x30) |
((ntsc_vdelay >> 2) & 0xC0);
bt848->colorctl = colorctl_gamma;
bt848->capctl = 0;
bt848->gpiodmactl = gpiodmactl_pltp23_16 |
gpiodmactl_pltp1_16 | gpiodmactl_pktp_32;
bt848->gpioreginp = 0;
bt848->contrastlo = contrast_100percent;
bt848->bright = 16;
bt848->adc = (2 << 6) | adc_crush;
bt848->econtrol = bt848->ocontrol = control_ldec;
bt848->escloop = bt848->oscloop = 0;
bt848->intstat = (ulong)-1;
bt848->intmask = intmask |
intstat_vsync | intstat_scerr | intstat_risci | intstat_ocerr |
intstat_vpress | intstat_fmtchg | intstat_hlock;
bt848->gpioouten &= ~0xF;
bt848->gpioouten |= 0xF;
bt848->gpiodata[0] &= ~0xF;
bt848->gpiodata[0] |= 2; // Enable audio on the MIRO card.
print("#V: %s (rev %d) (%s/%s) %.8ulX, intl %d\n",
tv->variant->name, pci->rid, boards[tv->board],
tv->tuner->name, pci->mem[0].bar & ~0x0F, pci->intl);
intrenable(pci->intl, (void (*)(Ureg *, void *))tvinterrupt,
tv, pci->tbdf, "tv");
tv->dbuf = (uchar *)malloc(ntsc_hactive * ntsc_vactive * sizeof(ushort));
memset(tv->dbuf, 0, ntsc_hactive * ntsc_vactive * sizeof(ushort));
}
}
static Chan*
tvattach(char *spec)
{
return devattach('V', spec);
}
static Walkqid *
tvwalk(Chan *c, Chan *nc, char **name, int nname)
{
return devwalk(c, nc, name, nname, tvtab, nelem(tvtab), devgen);
}
static int
tvstat(Chan *c, uchar *db, int n)
{
return devstat(c, db, n, tvtab, nelem(tvtab), devgen);
}
static Chan*
tvopen(Chan *c, int omode)
{
return devopen(c, omode, tvtab, nelem(tvtab), devgen);
}
static void
tvclose(Chan *)
{}
static long
tvread(Chan *c, void *a, long n, vlong offset)
{
static char regs[10 * K];
static int regslen;
char *e, *p;
int nbytes;
USED(offset);
switch((int)c->qid.path) {
case Qdir:
return devdirread(c, a, n, tvtab, nelem(tvtab), devgen);
case Qdata:
error(Eio);
case Qregs:
if (offset == 0) {
Bt848 *bt848 = tv->bt848;
int i;
e = regs + sizeof(regs);
p = regs;
for (i = 0; i < 0x300 >> 2; i++)
p = seprint(p, e, "%.3X %.8ulX\n", i << 2, ((ulong *)bt848)[i]);
regslen = p - regs;
}
if (offset >= regslen)
return 0;
if (offset + n > regslen)
n = regslen - offset;
return readstr(offset, a, n, ®s[offset]);
case Qdbuf:
if (offset > ntsc_hactive * ntsc_vactive * sizeof(ushort)) {
memset(tv->dbuf, 0xaa,
ntsc_hactive * ntsc_vactive * sizeof(ushort));
return 0;
}
if (offset + n > ntsc_hactive * ntsc_vactive * sizeof(ushort))
nbytes = ntsc_hactive * ntsc_vactive * sizeof(ushort) - offset;
else
nbytes = n;
memmove(a, tv->dbuf + offset, nbytes);
return nbytes;
default:
n=0;
break;
}
return n;
}
static long
tvwrite(Chan *c, void *a, long n, vlong)
{
Cmdbuf *cb;
Cmdtab *ct;
switch((int)c->qid.path) {
case Qctl:
cb = parsecmd(a, n);
if(waserror()){
free(cb);
nexterror();
}
ct = lookupcmd(cb, tvctlmsg, nelem(tvctlmsg));
switch (ct->index) {
case CMvstart:
vstart(tv, strtoul(cb->f[1], (char **)nil, 0),
(int)strtoul(cb->f[2], (char **)nil, 0));
break;
case CMvstop:
vstop(tv);
break;
case CMchannel:
frequency(tv, (int)strtol(cb->f[1], (char **)nil, 0),
(int)strtol(cb->f[2], (char **)nil, 0));
break;
}
poperror();
break;
default:
error(Eio);
}
return n;
}
Dev tvdevtab = {
'V',
"tv",
devreset,
tvinit,
devshutdown,
tvattach,
tvwalk,
tvstat,
tvopen,
devcreate,
tvclose,
tvread,
devbread,
tvwrite,
devbwrite,
devremove,
devwstat,
};
static void
tvinterrupt(Ureg *, Tv *tv)
{
Bt848 *bt848 = tv->bt848;
ulong status;
while ((status = bt848->intstat & bt848->intmask) != 0) {
bt848->intstat = status;
if ((status & intstat_fmtchg) == intstat_fmtchg) {
iprint("int: fmtchg\n");
status &= ~intstat_fmtchg;
}
if ((status & intstat_vpress) == intstat_vpress) {
iprint("int: vpress\n");
status &= ~intstat_vpress;
}
if ((status & intstat_vsync) == intstat_vsync)
status &= ~intstat_vsync;
if ((status & intstat_scerr) == intstat_scerr) {
iprint("int: scerr\n");
bt848->gpiodmactl &=
~(gpiodmactl_riscenable|gpiodmactl_fifoenable);
bt848->gpiodmactl |= gpiodmactl_fifoenable;
bt848->gpiodmactl |= gpiodmactl_riscenable;
status &= ~intstat_scerr;
}
if ((status & intstat_risci) == intstat_risci) {
iprint("int: risci\n");
status &= ~intstat_risci;
}
if ((status & intstat_ocerr) == intstat_ocerr) {
iprint("int: ocerr\n");
status &= ~intstat_ocerr;
}
if ((status & intstat_fbus) == intstat_fbus) {
iprint("int: fbus\n");
status &= ~intstat_fbus;
}
if (status)
iprint("int: ignored interrupts %.8ulX\n", status);
}
}
static int
i2cread(Tv *tv, uchar off, uchar *v)
{
Bt848 *bt848 = tv->bt848;
ulong intstat;
int i;
bt848->intstat = intstat_i2cdone;
bt848->i2c = (off << 24) | tv->i2ccmd;
intstat = -1;
for (i = 0; i != 1000; i++) {
if ((intstat = bt848->intstat) & intstat_i2cdone)
break;
microdelay(1000);
}
if (i == 1000) {
print("i2cread: timeout\n");
return 0;
}
if ((intstat & intstat_i2crack) == 0)
return 0;
*v = bt848->i2c >> 8;
return 1;
}
static int
i2cwrite(Tv *tv, uchar off, uchar d1, uchar d2, int both)
{
Bt848 *bt848 = tv->bt848;
ulong intstat, data;
int i;
bt848->intstat = intstat_i2cdone;
data = (off << 24) | (d1 << 16) | tv->i2ccmd;
if (both)
data |= (d2 << 8) | i2c_bt848w3b;
bt848->i2c = data;
intstat = 0;
for (i = 0; i != 1000; i++) {
if ((intstat = bt848->intstat) & intstat_i2cdone)
break;
microdelay(1000);
}
if (i == 1000) {
print("i2cread: timeout\n");
return 0;
}
if ((intstat & intstat_i2crack) == 0)
return 0;
return 1;
}
static ulong *
riscprogram(ulong paddr, int stride, int bpp)
{
ulong *p, *pbase;
int i;
pbase = p = (ulong *)malloc((ntsc_vactive + 5) * 2 * sizeof(ulong));
assert(p);
assert(ntsc_hactive * bpp <= 0x7FF);
*p++ = riscsync | riscsync_resync | riscsync_vre;
*p++ = 0;
*p++ = riscsync | riscsync_fm1;
*p++ = 0;
for (i = 0; i != ntsc_vactive / 2; i++) {
*p++ = riscwrite | ntsc_hactive * bpp | riscwrite_sol | riscwrite_eol;
*p++ = paddr + i * 2 * stride * bpp;
}
*p++ = riscsync | riscsync_resync | riscsync_vro;
*p++ = 0;
*p++ = riscsync | riscsync_fm1;
*p++ = 0;
for (i = 0; i != ntsc_vactive / 2; i++) {
*p++ = riscwrite | ntsc_hactive * bpp | riscwrite_sol | riscwrite_eol;
*p++ = paddr + (i * 2 + 1) * stride * bpp;
}
*p++ = riscjmp;
*p++ = PADDR(pbase);
USED(p);
return pbase;
}
static void
vstart(Tv *tv, ulong paddr, int stride)
{
Bt848 *bt848 = tv->bt848;
ulong *program, cfmt;
int bpp;
cfmt = bt848->colorfmt;
bpp = -1;
switch (cfmt) {
case colorfmt_rgb16:
bpp = 2;
break;
default:
panic("render: Unsupport color format\n");
}
program = riscprogram(paddr, stride, bpp);
// program = riscprogram(PADDR(tv->dbuf), ntsc_hactive * bpp, bpp);
ilock(tv);
if (waserror()) {
iunlock(tv);
free(program);
nexterror();
}
if (tv->program)
error(Einuse);
if (cfmt != bt848->colorfmt)
error(Eio);
tv->program = program;
bt848->riscstrtadd = PADDR(tv->program);
bt848->capctl |= capctl_captureodd|capctl_captureeven;
bt848->gpiodmactl |= gpiodmactl_fifoenable;
bt848->gpiodmactl |= gpiodmactl_riscenable;
poperror();
iunlock(tv);
}
static void
vstop(Tv *tv)
{
Bt848 *bt848 = tv->bt848;
ilock(tv);
if (waserror()) {
if (tv->program)
free(tv->program);
iunlock(tv);
nexterror();
}
if (tv->program) {
bt848->gpiodmactl &= ~gpiodmactl_riscenable;
bt848->gpiodmactl &= ~gpiodmactl_fifoenable;
bt848->capctl &= ~(capctl_captureodd|capctl_captureeven);
free(tv->program);
tv->program = nil;
}
poperror();
iunlock(tv);
}
static long
hrcfreq[] = { /* HRC CATV frequencies */
0, 7200, 5400, 6000, 6600, 7800, 8400, 17400,
18000, 18600, 19200, 19800, 20400, 21000, 12000, 12600,
13200, 13800, 14400, 15000, 15600, 16200, 16800, 21600,
22200, 22800, 23400, 24000, 24600, 25200, 25800, 26400,
27000, 27600, 28200, 28800, 29400, 30000, 30600, 31200,
31800, 32400, 33000, 33600, 34200, 34800, 35400, 36000,
36600, 37200, 37800, 38400, 39000, 39600, 40200, 40800,
41400, 42000, 42600, 43200, 43800, 44400, 45000, 45600,
46200, 46800, 47400, 48000, 48600, 49200, 49800, 50400,
51000, 51600, 52200, 52800, 53400, 54000, 54600, 55200,
55800, 56400, 57000, 57600, 58200, 58800, 59400, 60000,
60600, 61200, 61800, 62400, 63000, 63600, 64200, 9000,
9600, 10200, 10800, 11400, 64800, 65400, 66000, 66600,
67200, 67800, 68400, 69000, 69600, 70200, 70800, 71400,
72000, 72600, 73200, 73800, 74400, 75000, 75600, 76200,
76800, 77400, 78000, 78600, 79200, 79800,
};
static void
frequency(Tv *tv, int channel, int finetune)
{
Tuner *tuner = tv->tuner;
long freq;
ushort div;
uchar cfg;
if (channel < 0 || channel > nelem(hrcfreq))
error(Ebadarg);
freq = (hrcfreq[channel] * Freqmultiplier) / 100;
if (freq < tuner->freq_vhfh)
cfg = tuner->VHF_L;
else if (freq < tuner->freq_uhf)
cfg = tuner->VHF_H;
else
cfg = tuner->UHF;
div = (freq + tuner->offs + finetune) & 0x7fff;
if (!i2cwrite(tv, 0xc0, (div >> 8) & 0x7f, div, 1))
error(Eio);
if (!i2cwrite(tv, 0xc0, tuner->cfg, cfg, 1))
error(Eio);
}