V4L/DVB (5129): M920x: break out qt1010 tuner code into a separate file

qt1010 is a tuner used in some other devices, so this code should be put
into a separate file so that it could be reused by other drivers.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/qt1010.h b/drivers/media/dvb/frontends/qt1010.h
new file mode 100644
index 000000000000..e526e3c23265
--- /dev/null
+++ b/drivers/media/dvb/frontends/qt1010.h
@@ -0,0 +1,221 @@
+/*
+ *  qt1010.h - DVB-T Tuner support
+ *
+ *  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.
+ */
+
+#ifndef _QT1010_H_
+#define _QT1010_H_
+
+#define QT1010_W 0
+#define QT1010_R 1
+/* Not actual hw limits. */
+#define QT1010_MIN_STEP 2000000
+#define QT1010_MIN_FREQ 48000000
+
+static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params, u8 *buf, int buf_len)
+{
+	int i;
+	int div, mod;
+	struct {
+		u8 read, reg, value;
+	} rd[46] = {	{ QT1010_W, 0x01, 0x80 },
+			{ QT1010_W, 0x02, 0x3f },
+			{ QT1010_W, 0x05, 0xff }, /* c */
+			{ QT1010_W, 0x06, 0x44 },
+			{ QT1010_W, 0x07, 0xff }, /* c */
+			{ QT1010_W, 0x08, 0x08 },
+			{ QT1010_W, 0x09, 0xff }, /* c */
+			{ QT1010_W, 0x0a, 0xff }, /* c */
+			{ QT1010_W, 0x0b, 0xff }, /* c */
+			{ QT1010_W, 0x0c, 0xe1 },
+			{ QT1010_W, 0x1a, 0xff }, /* 10 c */
+			{ QT1010_W, 0x1b, 0x00 },
+			{ QT1010_W, 0x1c, 0x89 },
+			{ QT1010_W, 0x11, 0xff }, /* c */
+			{ QT1010_W, 0x12, 0x91 },
+			{ QT1010_W, 0x22, 0xff }, /* c */
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_W, 0x1e, 0xd0 },
+			{ QT1010_R, 0x22, 0xff }, /* c read */
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_R, 0x05, 0xff }, /* 20 c read */
+			{ QT1010_R, 0x22, 0xff }, /* c read */
+			{ QT1010_W, 0x23, 0xd0 },
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_W, 0x1e, 0xe0 },
+			{ QT1010_R, 0x23, 0xff }, /* c read */
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_W, 0x24, 0xd0 },
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_W, 0x1e, 0xf0 },
+			{ QT1010_R, 0x24, 0xff }, /* 30 c read */
+			{ QT1010_W, 0x1e, 0x00 },
+			{ QT1010_W, 0x14, 0x7f },
+			{ QT1010_W, 0x15, 0x7f },
+			{ QT1010_W, 0x05, 0xff }, /* c */
+			{ QT1010_W, 0x06, 0x00 },
+			{ QT1010_W, 0x15, 0x1f },
+			{ QT1010_W, 0x16, 0xff },
+			{ QT1010_W, 0x18, 0xff },
+			{ QT1010_W, 0x1f, 0xff }, /* c */
+			{ QT1010_W, 0x20, 0xff }, /* 40 c */
+			{ QT1010_W, 0x21, 0x53 },
+			{ QT1010_W, 0x25, 0xbd },
+			{ QT1010_W, 0x26, 0x15 },
+			{ QT1010_W, 0x02, 0x00 },
+			{ QT1010_W, 0x01, 0x00 },
+			};
+	struct i2c_msg msg;
+	struct dvb_usb_device *d = fe->dvb->priv;
+	unsigned long freq = params->frequency;
+
+	if (freq % QT1010_MIN_STEP)
+		printk("frequency not supported.\n");
+
+	(void) buf;
+	(void) buf_len;
+
+	div = (freq - QT1010_MIN_FREQ) / QT1010_MIN_STEP;
+	mod = (div + 16 - 9) % 16;
+
+	/* 0x5 */
+	if (div >= 377)
+		rd[2].value = 0x74;
+	else if (div >=  265)
+		rd[2].value = 0x54;
+	else if (div >=  121)
+		rd[2].value = 0x34;
+	else
+		rd[2].value = 0x14;
+
+	/* 0x7 */
+	rd[4].value = (((freq - QT1010_MIN_FREQ) / 1000000) * 9975 + 12960000) / 320000;
+
+	/* 09 */
+	if (mod < 4)
+		rd[6].value = 0x1d;
+	else
+		rd[6].value = 0x1c;
+
+	/* 0a */
+	if (mod < 2)
+		rd[7].value = 0x09;
+	else if (mod < 4)
+		rd[7].value = 0x08;
+	else if (mod < 6)
+		rd[7].value = 0x0f;
+	else if (mod < 8)
+		rd[7].value = 0x0e;
+	else if (mod < 10)
+		rd[7].value = 0x0d;
+	else if (mod < 12)
+		rd[7].value = 0x0c;
+	else if (mod < 14)
+		rd[7].value = 0x0b;
+	else
+		rd[7].value = 0x0a;
+
+	/* 0b */
+	if (div & 1)
+		rd[8].value = 0x45;
+	else
+		rd[8].value = 0x44;
+
+	/* 1a */
+	if (div & 1)
+		rd[10].value = 0x78;
+	else
+		rd[10].value = 0xf8;
+
+	/* 11 */
+	if (div >= 265)
+		rd[13].value = 0xf9;
+	else if (div >=  121)
+		rd[13].value = 0xfd;
+	else
+		rd[13].value = 0xf9;
+
+	/* 22 */
+	if (div < 201)
+		rd[15].value = 0xd0;
+	else if (div < 217)
+		rd[15].value = 0xd3;
+	else if (div < 233)
+		rd[15].value = 0xd6;
+	else if (div < 249)
+		rd[15].value = 0xd9;
+	else if (div < 265)
+		rd[15].value = 0xda;
+	else
+		rd[15].value = 0xd0;
+
+	/* 05 */
+	if (div >= 377)
+		rd[34].value = 0x70;
+	else if (div >=  265)
+		rd[34].value = 0x50;
+	else if (div >=  121)
+		rd[34].value = 0x30;
+	else
+		rd[34].value = 0x10;
+
+	/* 1f */
+	if (mod < 4)
+		rd[39].value = 0x64;
+	else if (mod < 6)
+		rd[39].value = 0x66;
+	else if (mod < 8)
+		rd[39].value = 0x67;
+	else if (mod < 12)
+		rd[39].value = 0x68;
+	else if (mod < 14)
+		rd[39].value = 0x69;
+	else
+		rd[39].value = 0x6a;
+
+	/* 20 */
+	if (mod < 4)
+		rd[40].value = 0x10;
+	else if (mod < 6)
+		rd[40].value = 0x11;
+	else if (mod < 10)
+		rd[40].value = 0x12;
+	else if (mod < 12)
+		rd[40].value = 0x13;
+	else if (mod < 14)
+		rd[40].value = 0x14;
+	else
+		rd[40].value = 0x15;
+
+	for (i = 0; i < sizeof(rd) / sizeof(*rd); i++) {
+		if (rd[i].read)
+			continue;
+
+		msg.flags = 0;
+		msg.len = 2;
+		msg.addr = 0xc4;
+		msg.buf = &rd[i].reg;
+
+		if (i2c_transfer(&d->i2c_adap, &msg, 1) != 1) {
+			printk("tuner write failed\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+#endif