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V4L/DVB (11588): stv090x: support > 60MSPS, simplify Srate calculation

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Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manu Abraham 2009-04-08 20:14:00 -03:00 committed by Mauro Carvalho Chehab
parent 94a809143a
commit 15bb366e86
1 changed files with 40 additions and 20 deletions
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60
drivers/media/dvb/frontends/stv090x.c
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@ -725,18 +725,22 @@ static int stv090x_set_srate(struct stv090x_state *state, u32 srate)
{
u32 sym;
if (srate > 6000000) {
sym = (srate / 1000) * 65536;
sym /= (state->mclk / 1000);
if (srate > 60000000) {
sym = (srate << 4); /* SR * 2^16 / master_clk */
sym /= (state->mclk >> 12);
} else if (srate > 6000000) {
sym = (srate << 6);
sym /= (state->mclk >> 10);
} else {
sym = (srate / 100) * 65536;
sym /= (state->mclk / 100);
sym = (srate << 9);
sym /= (state->mclk >> 7);
}
if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0xff) < 0) /* MSB */
if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0x7f) < 0) /* MSB */
goto err;
if (STV090x_WRITE_DEMOD(state, SFRINIT0, (sym & 0xff)) < 0) /* LSB */
goto err;
return 0;
err:
dprintk(FE_ERROR, 1, "I/O error");
@ -748,17 +752,29 @@ static int stv090x_set_max_srate(struct stv090x_state *state, u32 clk, u32 srate
u32 sym;
srate = 105 * (srate / 100);
if (srate > 6000000) {
sym = (srate / 1000) * 65536;
sym /= (clk / 1000);
if (srate > 60000000) {
sym = (srate << 4); /* SR * 2^16 / master_clk */
sym /= (state->mclk >> 12);
} else if (srate > 6000000) {
sym = (srate << 6);
sym /= (state->mclk >> 10);
} else {
sym = (srate / 100) * 65536;
sym /= (clk / 100);
sym = (srate << 9);
sym /= (state->mclk >> 7);
}
if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0) /* MSB */
goto err;
if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0) /* LSB */
goto err;
if (sym < 0x7fff) {
if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0) /* MSB */
goto err;
if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0) /* LSB */
goto err;
} else {
if (STV090x_WRITE_DEMOD(state, SFRUP1, 0x7f) < 0) /* MSB */
goto err;
if (STV090x_WRITE_DEMOD(state, SFRUP0, 0xff) < 0) /* LSB */
goto err;
}
return 0;
err:
dprintk(FE_ERROR, 1, "I/O error");
@ -770,13 +786,17 @@ static int stv090x_set_min_srate(struct stv090x_state *state, u32 clk, u32 srate
u32 sym;
srate = 95 * (srate / 100);
if (srate > 6000000) {
sym = (srate / 1000) * 65536;
sym /= (clk / 1000);
if (srate > 60000000) {
sym = (srate << 4); /* SR * 2^16 / master_clk */
sym /= (state->mclk >> 12);
} else if (srate > 6000000) {
sym = (srate << 6);
sym /= (state->mclk >> 10);
} else {
sym = (srate / 100) * 65536;
sym /= (clk / 100);
sym = (srate << 9);
sym /= (state->mclk >> 7);
}
if (STV090x_WRITE_DEMOD(state, SFRLOW1, ((sym >> 8) & 0xff)) < 0) /* MSB */
goto err;
if (STV090x_WRITE_DEMOD(state, SFRLOW0, (sym & 0xff)) < 0) /* LSB */