From: Gerd Knorr <kraxel@bytesex.org>
To: Andrew Morton <akpm@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
dvb list <linux-dvb@linuxtv.org>
Subject: [patch] dvb: add pll lib
Date: Tue, 8 Mar 2005 11:57:26 +0100 [thread overview]
Message-ID: <20050308105726.GA30986@bytesex> (raw)
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@bytesex.org>
---
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@bytesex.org> [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)
next reply other threads:[~2005-03-08 11:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-08 10:57 Gerd Knorr [this message]
2005-03-09 1:37 ` [linux-dvb] [patch] dvb: add pll lib Johannes Stezenbach
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050308105726.GA30986@bytesex \
--to=kraxel@bytesex.org \
--cc=akpm@osdl.org \
--cc=linux-dvb@linuxtv.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.