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Subject[DVB patch 15/37] stv0299: fix FE_DISHNETWORK_SEND_LEGACY_CMD
fix the current stv0299 code that handles FE_DISHNETWORK_SEND_LEGACY_CMD.
(supports the legacy SW21, SW44, and SW64 switches)

Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
---
drivers/media/dvb/frontends/stv0299.c | 78 ++++++++++++++++++++++++++++------
1 files changed, 66 insertions(+), 12 deletions(-)
Index: linux-2.6.12-rc4/drivers/media/dvb/frontends/stv0299.c
===================================================================
--- linux-2.6.12-rc4.orig/drivers/media/dvb/frontends/stv0299.c 2005-05-08 15:55:38.000000000 +0200
+++ linux-2.6.12-rc4/drivers/media/dvb/frontends/stv0299.c 2005-05-08 16:20:39.000000000 +0200
@@ -70,6 +70,7 @@ struct stv0299_state {
#define STATUS_UCBLOCKS 1

static int debug;
+static int debug_legacy_dish_switch;
#define dprintk(args...) \
do { \
if (debug) printk(KERN_DEBUG "stv0299: " args); \
@@ -385,34 +386,84 @@ static int stv0299_set_voltage (struct d
};
}

-static int stv0299_send_legacy_dish_cmd(struct dvb_frontend* fe, u32 cmd)
+static inline s32 stv0299_calc_usec_delay (struct timeval lasttime, struct timeval curtime)
{
+ return ((curtime.tv_usec < lasttime.tv_usec) ?
+ 1000000 - lasttime.tv_usec + curtime.tv_usec :
+ curtime.tv_usec - lasttime.tv_usec);
+}
+
+static void stv0299_sleep_until (struct timeval *waketime, u32 add_usec)
+{
+ struct timeval lasttime;
+ s32 delta, newdelta;
+
+ waketime->tv_usec += add_usec;
+ if (waketime->tv_usec >= 1000000) {
+ waketime->tv_usec -= 1000000;
+ waketime->tv_sec++;
+ }
+
+ do_gettimeofday (&lasttime);
+ delta = stv0299_calc_usec_delay (lasttime, *waketime);
+ if (delta > 2500) {
+ msleep ((delta - 1500) / 1000);
+ do_gettimeofday (&lasttime);
+ newdelta = stv0299_calc_usec_delay (lasttime, *waketime);
+ delta = (newdelta > delta) ? 0 : newdelta;
+ }
+ if (delta > 0)
+ udelay (delta);
+}
+
+static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, u32 cmd)
+{
+ struct stv0299_state* state = fe->demodulator_priv;
+ u8 reg0x08;
+ u8 reg0x0c;
+ u8 lv_mask = 0x40;
u8 last = 1;
int i;
+ struct timeval nexttime;
+ struct timeval tv[10];

- /* reset voltage at the end
- if((0x50 & stv0299_readreg (i2c, 0x0c)) == 0x50)
- cmd |= 0x80;
- else
- cmd &= 0x7F;
- */
+ reg0x08 = stv0299_readreg (state, 0x08);
+ reg0x0c = stv0299_readreg (state, 0x0c);
+ reg0x0c &= 0x0f;
+ stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
+ if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
+ lv_mask = 0x10;

cmd = cmd << 1;
- dprintk("%s switch command: 0x%04x\n",__FUNCTION__, cmd);
+ if (debug_legacy_dish_switch)
+ printk ("%s switch command: 0x%04x\n",__FUNCTION__, cmd);
+
+ do_gettimeofday (&nexttime);
+ if (debug_legacy_dish_switch)
+ memcpy (&tv[0], &nexttime, sizeof (struct timeval));
+ stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */

- stv0299_set_voltage(fe,SEC_VOLTAGE_18);
- msleep(32);
+ stv0299_sleep_until (&nexttime, 32000);

for (i=0; i<9; i++) {
+ if (debug_legacy_dish_switch)
+ do_gettimeofday (&tv[i+1]);
if((cmd & 0x01) != last) {
- stv0299_set_voltage(fe, last ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
+ /* set voltage to (last ? 13V : 18V) */
+ stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
last = (last) ? 0 : 1;
}

cmd = cmd >> 1;

if (i != 8)
- msleep(8);
+ stv0299_sleep_until (&nexttime, 8000);
+ }
+ if (debug_legacy_dish_switch) {
+ printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
+ __FUNCTION__, fe->dvb->num);
+ for (i=1; i < 10; i++)
+ printk ("%d: %d\n", i, stv0299_calc_usec_delay (tv[i-1] , tv[i]));
}

return 0;
@@ -719,6 +770,9 @@ static struct dvb_frontend_ops stv0299_o
.dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
};

+module_param(debug_legacy_dish_switch, int, 0444);
+MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
+
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

--

-
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