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