[patch] dvb: add pll lib
From: Gerd Knorr
Date: Tue Mar 08 2005 - 06:08:54 EST
Hi,
This adds some helper code to handle tuning for dvb cards,
with a struct describing the pll and a function calculating
the command sequence needed to program it.
This one was discussed + accepted on the linuxtv list and
also is in the linuxtv cvs. As the the cx88 driver update
I want finally get out of the door depends on this one I'll
go submit it myself instead of waiting for the dvb guys doing
it.
Gerd
Signed-off-by: Gerd Knorr <kraxel@xxxxxxxxxxx>
---
drivers/media/dvb/frontends/Makefile | 1
drivers/media/dvb/frontends/dvb-pll.c | 168 ++++++++++++++++++++++++++
drivers/media/dvb/frontends/dvb-pll.h | 34 +++++
3 files changed, 203 insertions(+)
Index: linux-2.6.11-rc4/drivers/media/dvb/frontends/Makefile
===================================================================
--- linux-2.6.11-rc4.orig/drivers/media/dvb/frontends/Makefile 2005-02-14 15:21:59.000000000 +0100
+++ linux-2.6.11-rc4/drivers/media/dvb/frontends/Makefile 2005-02-15 12:31:40.000000000 +0100
@@ -4,6 +4,7 @@
EXTRA_CFLAGS = -Idrivers/media/dvb/dvb-core/
+obj-$(CONFIG_DVB_CORE) += dvb-pll.o
obj-$(CONFIG_DVB_STV0299) += stv0299.o
obj-$(CONFIG_DVB_SP8870) += sp8870.o
obj-$(CONFIG_DVB_CX22700) += cx22700.o
Index: linux-2.6.11-rc4/drivers/media/dvb/frontends/dvb-pll.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.11-rc4/drivers/media/dvb/frontends/dvb-pll.c 2005-02-15 12:31:51.000000000 +0100
@@ -0,0 +1,168 @@
+/*
+ * $Id: dvb-pll.c,v 1.7 2005/02/10 11:52:02 kraxel Exp $
+ *
+ * descriptions + helper functions for simple dvb plls.
+ *
+ * (c) 2004 Gerd Knorr <kraxel@xxxxxxxxxxx> [SuSE Labs]
+ *
+ * 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/dvb/frontend.h>
+#include <asm/types.h>
+
+#include "dvb-pll.h"
+
+/* ----------------------------------------------------------- */
+/* descriptions */
+
+struct dvb_pll_desc dvb_pll_thomson_dtt7579 = {
+ .name = "Thomson dtt7579",
+ .min = 177000000,
+ .max = 858000000,
+ .count = 5,
+ .entries = {
+ { 0, 36166667, 166666, 0xb4, 0x03 }, /* go sleep */
+ { 443250000, 36166667, 166666, 0xb4, 0x02 },
+ { 542000000, 36166667, 166666, 0xb4, 0x08 },
+ { 771000000, 36166667, 166666, 0xbc, 0x08 },
+ { 999999999, 36166667, 166666, 0xf4, 0x08 },
+ },
+};
+EXPORT_SYMBOL(dvb_pll_thomson_dtt7579);
+
+struct dvb_pll_desc dvb_pll_thomson_dtt7610 = {
+ .name = "Thomson dtt7610",
+ .min = 44000000,
+ .max = 958000000,
+ .count = 3,
+ .entries = {
+ { 157250000, 44000000, 62500, 0x8e, 0x39 },
+ { 454000000, 44000000, 62500, 0x8e, 0x3a },
+ { 999999999, 44000000, 62500, 0x8e, 0x3c },
+ },
+};
+EXPORT_SYMBOL(dvb_pll_thomson_dtt7610);
+
+static void thomson_dtt759x_bw(u8 *buf, int bandwidth)
+{
+ if (BANDWIDTH_7_MHZ == bandwidth)
+ buf[3] |= 0x10;
+}
+
+struct dvb_pll_desc dvb_pll_thomson_dtt759x = {
+ .name = "Thomson dtt759x",
+ .min = 177000000,
+ .max = 896000000,
+ .setbw = thomson_dtt759x_bw,
+ .count = 6,
+ .entries = {
+ { 0, 36166667, 166666, 0x84, 0x03 },
+ { 264000000, 36166667, 166666, 0xb4, 0x02 },
+ { 470000000, 36166667, 166666, 0xbc, 0x02 },
+ { 735000000, 36166667, 166666, 0xbc, 0x08 },
+ { 835000000, 36166667, 166666, 0xf4, 0x08 },
+ { 999999999, 36166667, 166666, 0xfc, 0x08 },
+ },
+};
+EXPORT_SYMBOL(dvb_pll_thomson_dtt759x);
+
+struct dvb_pll_desc dvb_pll_lg_z201 = {
+ .name = "LG z201",
+ .min = 174000000,
+ .max = 862000000,
+ .count = 5,
+ .entries = {
+ { 0, 36166667, 166666, 0xbc, 0x03 },
+ { 443250000, 36166667, 166666, 0xbc, 0x01 },
+ { 542000000, 36166667, 166666, 0xbc, 0x02 },
+ { 830000000, 36166667, 166666, 0xf4, 0x02 },
+ { 999999999, 36166667, 166666, 0xfc, 0x02 },
+ },
+};
+EXPORT_SYMBOL(dvb_pll_lg_z201);
+
+struct dvb_pll_desc dvb_pll_unknown_1 = {
+ .name = "unknown 1", /* used by dntv live dvb-t */
+ .min = 174000000,
+ .max = 862000000,
+ .count = 9,
+ .entries = {
+ { 150000000, 36166667, 166666, 0xb4, 0x01 },
+ { 173000000, 36166667, 166666, 0xbc, 0x01 },
+ { 250000000, 36166667, 166666, 0xb4, 0x02 },
+ { 400000000, 36166667, 166666, 0xbc, 0x02 },
+ { 420000000, 36166667, 166666, 0xf4, 0x02 },
+ { 470000000, 36166667, 166666, 0xfc, 0x02 },
+ { 600000000, 36166667, 166666, 0xbc, 0x08 },
+ { 730000000, 36166667, 166666, 0xf4, 0x08 },
+ { 999999999, 36166667, 166666, 0xfc, 0x08 },
+ },
+};
+EXPORT_SYMBOL(dvb_pll_unknown_1);
+
+/* ----------------------------------------------------------- */
+/* code */
+
+static int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
+ u32 freq, int bandwidth)
+{
+ u32 div;
+ int i;
+
+ if (freq != 0 && (freq < desc->min || freq > desc->max))
+ return -EINVAL;
+
+ for (i = 0; i < desc->count; i++) {
+ if (freq > desc->entries[i].limit)
+ continue;
+ break;
+ }
+ if (debug)
+ printk("pll: %s: freq=%d bw=%d | i=%d/%d\n",
+ desc->name, freq, bandwidth, i, desc->count);
+ BUG_ON(i == desc->count);
+
+ div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize;
+ buf[0] = div >> 8;
+ buf[1] = div & 0xff;
+ buf[2] = desc->entries[i].cb1;
+ buf[3] = desc->entries[i].cb2;
+
+ if (desc->setbw)
+ desc->setbw(buf, bandwidth);
+
+ if (debug)
+ printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
+ desc->name, div, buf[0], buf[1], buf[2], buf[3]);
+
+ return 0;
+}
+EXPORT_SYMBOL(dvb_pll_configure);
+
+MODULE_DESCRIPTION("dvb pll library");
+MODULE_AUTHOR("Gerd Knorr");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
Index: linux-2.6.11-rc4/drivers/media/dvb/frontends/dvb-pll.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.11-rc4/drivers/media/dvb/frontends/dvb-pll.h 2005-02-15 12:31:51.000000000 +0100
@@ -0,0 +1,34 @@
+/*
+ * $Id: dvb-pll.h,v 1.2 2005/02/10 11:43:41 kraxel Exp $
+ */
+
+struct dvb_pll_desc {
+ char *name;
+ u32 min;
+ u32 max;
+ void (*setbw)(u8 *buf, int bandwidth);
+ int count;
+ struct {
+ u32 limit;
+ u32 offset;
+ u32 stepsize;
+ u8 cb1;
+ u8 cb2;
+ } entries[];
+};
+
+extern struct dvb_pll_desc dvb_pll_thomson_dtt7579;
+extern struct dvb_pll_desc dvb_pll_thomson_dtt759x;
+extern struct dvb_pll_desc dvb_pll_thomson_dtt7610;
+extern struct dvb_pll_desc dvb_pll_lg_z201;
+extern struct dvb_pll_desc dvb_pll_unknown_1;
+
+int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
+ u32 freq, int bandwidth);
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * compile-command: "make DVB=1"
+ * End:
+ */
--
#define printk(args...) fprintf(stderr, ## args)
-
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