1 files changed, 287 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/mt2266.c b/drivers/media/dvb/frontends/mt2266.c
new file mode 100644
index 000000000000..03fe8265745f
--- /dev/null
+++ b/drivers/media/dvb/frontends/mt2266.c
@@ -0,0 +1,287 @@
+/*
+ *  Driver for Microtune MT2266 "Direct conversion low power broadband tuner"
+ *
+ *  Copyright (c) 2007 Olivier DANET <odanet@caramail.com>
+ *
+ *  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.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dvb/frontend.h>
+#include <linux/i2c.h>
+
+#include "dvb_frontend.h"
+#include "mt2266.h"
+
+#define I2C_ADDRESS 0x60
+
+#define REG_PART_REV   0
+#define REG_TUNE       1
+#define REG_BAND       6
+#define REG_BANDWIDTH  8
+#define REG_LOCK       0x12
+
+#define PART_REV 0x85
+
+struct mt2266_priv {
+        struct mt2266_config *cfg;
+        struct i2c_adapter   *i2c;
+
+        u32 frequency;
+        u32 bandwidth;
+};
+
+/* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+
+#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2266: " args); printk("\n"); }} while (0)
+
+// Reads a single register
+static int mt2266_readreg(struct mt2266_priv *priv, u8 reg, u8 *val)
+{
+        struct i2c_msg msg[2] = {
+                { .addr = priv->cfg->i2c_address, .flags = 0,        .buf = &reg, .len = 1 },
+                { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val,  .len = 1 },
+        };
+        if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+                printk(KERN_WARNING "MT2266 I2C read failed\n");
+                return -EREMOTEIO;
+        }
+        return 0;
+}
+
+// Writes a single register
+static int mt2266_writereg(struct mt2266_priv *priv, u8 reg, u8 val)
+{
+        u8 buf[2] = { reg, val };
+        struct i2c_msg msg = {
+                .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2
+        };
+        if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+                printk(KERN_WARNING "MT2266 I2C write failed\n");
+                return -EREMOTEIO;
+        }
+        return 0;
+}
+
+// Writes a set of consecutive registers
+static int mt2266_writeregs(struct mt2266_priv *priv,u8 *buf, u8 len)
+{
+        struct i2c_msg msg = {
+                .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len
+        };
+        if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+                printk(KERN_WARNING "MT2266 I2C write failed (len=%i)\n",(int)len);
+                return -EREMOTEIO;
+        }
+        return 0;
+}
+
+// Initialisation sequences
+static u8 mt2266_init1[] = {
+        REG_TUNE,
+        0x00, 0x00, 0x28, 0x00, 0x52, 0x99, 0x3f };
+
+static u8 mt2266_init2[] = {
+        0x17,                                     0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a,
+        0xd4, 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14, 0x01, 0x01, 0x01, 0x01,
+        0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff, 0xff, 0x00, 0x77, 0x0f, 0x2d };
+
+static u8 mt2266_init_8mhz[] = {
+        REG_BANDWIDTH,
+        0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22 };
+
+static u8 mt2266_init_7mhz[] = {
+        REG_BANDWIDTH,
+        0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32 };
+
+static u8 mt2266_init_6mhz[] = {
+        REG_BANDWIDTH,
+        0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7 };
+
+#define FREF 30000       // Quartz oscillator 30 MHz
+
+static int mt2266_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
+{
+        struct mt2266_priv *priv;
+        int ret=0;
+        u32 freq;
+        u32 tune;
+        u8  lnaband;
+        u8  b[10];
+        int i;
+
+        priv = fe->tuner_priv;
+
+        mt2266_writereg(priv,0x17,0x6d);
+        mt2266_writereg(priv,0x1c,0xff);
+
+        freq = params->frequency / 1000; // Hz -> kHz
+        priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
+        priv->frequency = freq * 1000;
+        tune=2 * freq * (8192/16) / (FREF/16);
+
+        if (freq <= 495000) lnaband = 0xEE; else
+        if (freq <= 525000) lnaband = 0xDD; else
+        if (freq <= 550000) lnaband = 0xCC; else
+        if (freq <= 580000) lnaband = 0xBB; else
+        if (freq <= 605000) lnaband = 0xAA; else
+        if (freq <= 630000) lnaband = 0x99; else
+        if (freq <= 655000) lnaband = 0x88; else
+        if (freq <= 685000) lnaband = 0x77; else
+        if (freq <= 710000) lnaband = 0x66; else
+        if (freq <= 735000) lnaband = 0x55; else
+        if (freq <= 765000) lnaband = 0x44; else
+        if (freq <= 802000) lnaband = 0x33; else
+        if (freq <= 840000) lnaband = 0x22; else lnaband = 0x11;
+
+        msleep(100);
+        mt2266_writeregs(priv,(params->u.ofdm.bandwidth==BANDWIDTH_6_MHZ)?mt2266_init_6mhz:
+                                (params->u.ofdm.bandwidth==BANDWIDTH_7_MHZ)?mt2266_init_7mhz:
+                                mt2266_init_8mhz,sizeof(mt2266_init_8mhz));
+
+        b[0] = REG_TUNE;
+        b[1] = (tune >> 8) & 0x1F;
+        b[2] = tune & 0xFF;
+        b[3] = tune >> 13;
+        mt2266_writeregs(priv,b,4);
+
+        dprintk("set_parms: tune=%d band=%d",(int)tune,(int)lnaband);
+        dprintk("set_parms: [1..3]: %2x %2x %2x",(int)b[1],(int)b[2],(int)b[3]);
+
+        b[0] = 0x05;
+        b[1] = 0x62;
+        b[2] = lnaband;
+        mt2266_writeregs(priv,b,3);
+
+        //Waits for pll lock or timeout
+        i = 0;
+        do {
+                mt2266_readreg(priv,REG_LOCK,b);
+                if ((b[0] & 0x40)==0x40)
+                        break;
+                msleep(10);
+                i++;
+        } while (i<10);
+        dprintk("Lock when i=%i",(int)i);
+        return ret;
+}
+
+static void mt2266_calibrate(struct mt2266_priv *priv)
+{
+        mt2266_writereg(priv,0x11,0x03);
+        mt2266_writereg(priv,0x11,0x01);
+
+        mt2266_writeregs(priv,mt2266_init1,sizeof(mt2266_init1));
+        mt2266_writeregs(priv,mt2266_init2,sizeof(mt2266_init2));
+
+        mt2266_writereg(priv,0x33,0x5e);
+        mt2266_writereg(priv,0x10,0x10);
+        mt2266_writereg(priv,0x10,0x00);
+
+        mt2266_writeregs(priv,mt2266_init_8mhz,sizeof(mt2266_init_8mhz));
+
+        msleep(25);
+        mt2266_writereg(priv,0x17,0x6d);
+        mt2266_writereg(priv,0x1c,0x00);
+        msleep(75);
+        mt2266_writereg(priv,0x17,0x6d);
+        mt2266_writereg(priv,0x1c,0xff);
+}
+
+static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+        struct mt2266_priv *priv = fe->tuner_priv;
+        *frequency = priv->frequency;
+        return 0;
+}
+
+static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+        struct mt2266_priv *priv = fe->tuner_priv;
+        *bandwidth = priv->bandwidth;
+        return 0;
+}
+
+static int mt2266_init(struct dvb_frontend *fe)
+{
+        struct mt2266_priv *priv = fe->tuner_priv;
+        mt2266_writereg(priv,0x17,0x6d);
+        mt2266_writereg(priv,0x1c,0xff);
+        return 0;
+}
+
+static int mt2266_sleep(struct dvb_frontend *fe)
+{
+        struct mt2266_priv *priv = fe->tuner_priv;
+        mt2266_writereg(priv,0x17,0x6d);
+        mt2266_writereg(priv,0x1c,0x00);
+        return 0;
+}
+
+static int mt2266_release(struct dvb_frontend *fe)
+{
+        kfree(fe->tuner_priv);
+        fe->tuner_priv = NULL;
+        return 0;
+}
+
+static const struct dvb_tuner_ops mt2266_tuner_ops = {
+        .info = {
+                .name           = "Microtune MT2266",
+                .frequency_min  = 470000000,
+                .frequency_max  = 860000000,
+                .frequency_step =     50000,
+        },
+        .release       = mt2266_release,
+        .init          = mt2266_init,
+        .sleep         = mt2266_sleep,
+        .set_params    = mt2266_set_params,
+        .get_frequency = mt2266_get_frequency,
+        .get_bandwidth = mt2266_get_bandwidth
+};
+
+struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg)
+{
+        struct mt2266_priv *priv = NULL;
+        u8 id = 0;
+
+        priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL);
+        if (priv == NULL)
+                return NULL;
+
+        priv->cfg      = cfg;
+        priv->i2c      = i2c;
+
+        if (mt2266_readreg(priv,0,&id) != 0) {
+                kfree(priv);
+                return NULL;
+        }
+        if (id != PART_REV) {
+                kfree(priv);
+                return NULL;
+        }
+        printk(KERN_INFO "MT2266: successfully identified\n");
+        memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops));
+
+        fe->tuner_priv = priv;
+        mt2266_calibrate(priv);
+        return fe;
+}
+EXPORT_SYMBOL(mt2266_attach);
+
+MODULE_AUTHOR("Olivier DANET");
+MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver");
+MODULE_LICENSE("GPL");