Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 363 insertions, 0 deletions

diff --git a/drivers/media/tuners/mc44s803.c b/drivers/media/tuners/mc44s803.c
new file mode 100644
index 000000000..ed8bdf7eb
--- /dev/null
+++ b/drivers/media/tuners/mc44s803.c
@@ -0,0 +1,363 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Driver for Freescale MC44S803 Low Power CMOS Broadband Tuner
+ *
+ *  Copyright (c) 2009 Jochen Friedrich <jochen@scram.de>
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dvb/frontend.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+
+#include <media/dvb_frontend.h>
+
+#include "mc44s803.h"
+#include "mc44s803_priv.h"
+
+#define mc_printk(level, format, arg...)	\
+	printk(level "mc44s803: " format , ## arg)
+
+/* Writes a single register */
+static int mc44s803_writereg(struct mc44s803_priv *priv, u32 val)
+{
+	u8 buf[3];
+	struct i2c_msg msg = {
+		.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 3
+	};
+
+	buf[0] = (val & 0xff0000) >> 16;
+	buf[1] = (val & 0xff00) >> 8;
+	buf[2] = (val & 0xff);
+
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		mc_printk(KERN_WARNING, "I2C write failed\n");
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+/* Reads a single register */
+static int mc44s803_readreg(struct mc44s803_priv *priv, u8 reg, u32 *val)
+{
+	u32 wval;
+	u8 buf[3];
+	int ret;
+	struct i2c_msg msg[] = {
+		{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
+		  .buf = buf, .len = 3 },
+	};
+
+	wval = MC44S803_REG_SM(MC44S803_REG_DATAREG, MC44S803_ADDR) |
+	       MC44S803_REG_SM(reg, MC44S803_D);
+
+	ret = mc44s803_writereg(priv, wval);
+	if (ret)
+		return ret;
+
+	if (i2c_transfer(priv->i2c, msg, 1) != 1) {
+		mc_printk(KERN_WARNING, "I2C read failed\n");
+		return -EREMOTEIO;
+	}
+
+	*val = (buf[0] << 16) | (buf[1] << 8) | buf[2];
+
+	return 0;
+}
+
+static void mc44s803_release(struct dvb_frontend *fe)
+{
+	struct mc44s803_priv *priv = fe->tuner_priv;
+
+	fe->tuner_priv = NULL;
+	kfree(priv);
+}
+
+static int mc44s803_init(struct dvb_frontend *fe)
+{
+	struct mc44s803_priv *priv = fe->tuner_priv;
+	u32 val;
+	int err;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+/* Reset chip */
+	val = MC44S803_REG_SM(MC44S803_REG_RESET, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_RS);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_RESET, MC44S803_ADDR);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+/* Power Up and Start Osc */
+
+	val = MC44S803_REG_SM(MC44S803_REG_REFOSC, MC44S803_ADDR) |
+	      MC44S803_REG_SM(0xC0, MC44S803_REFOSC) |
+	      MC44S803_REG_SM(1, MC44S803_OSCSEL);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_POWER, MC44S803_ADDR) |
+	      MC44S803_REG_SM(0x200, MC44S803_POWER);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	msleep(10);
+
+	val = MC44S803_REG_SM(MC44S803_REG_REFOSC, MC44S803_ADDR) |
+	      MC44S803_REG_SM(0x40, MC44S803_REFOSC) |
+	      MC44S803_REG_SM(1, MC44S803_OSCSEL);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	msleep(20);
+
+/* Setup Mixer */
+
+	val = MC44S803_REG_SM(MC44S803_REG_MIXER, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_TRI_STATE) |
+	      MC44S803_REG_SM(0x7F, MC44S803_MIXER_RES);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+/* Setup Cirquit Adjust */
+
+	val = MC44S803_REG_SM(MC44S803_REG_CIRCADJ, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_G1) |
+	      MC44S803_REG_SM(1, MC44S803_G3) |
+	      MC44S803_REG_SM(0x3, MC44S803_CIRCADJ_RES) |
+	      MC44S803_REG_SM(1, MC44S803_G6) |
+	      MC44S803_REG_SM(priv->cfg->dig_out, MC44S803_S1) |
+	      MC44S803_REG_SM(0x3, MC44S803_LP) |
+	      MC44S803_REG_SM(1, MC44S803_CLRF) |
+	      MC44S803_REG_SM(1, MC44S803_CLIF);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_CIRCADJ, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_G1) |
+	      MC44S803_REG_SM(1, MC44S803_G3) |
+	      MC44S803_REG_SM(0x3, MC44S803_CIRCADJ_RES) |
+	      MC44S803_REG_SM(1, MC44S803_G6) |
+	      MC44S803_REG_SM(priv->cfg->dig_out, MC44S803_S1) |
+	      MC44S803_REG_SM(0x3, MC44S803_LP);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+/* Setup Digtune */
+
+	val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
+	      MC44S803_REG_SM(3, MC44S803_XOD);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+/* Setup AGC */
+
+	val = MC44S803_REG_SM(MC44S803_REG_LNAAGC, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_AT1) |
+	      MC44S803_REG_SM(1, MC44S803_AT2) |
+	      MC44S803_REG_SM(1, MC44S803_AGC_AN_DIG) |
+	      MC44S803_REG_SM(1, MC44S803_AGC_READ_EN) |
+	      MC44S803_REG_SM(1, MC44S803_LNA0);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+	return 0;
+
+exit:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	mc_printk(KERN_WARNING, "I/O Error\n");
+	return err;
+}
+
+static int mc44s803_set_params(struct dvb_frontend *fe)
+{
+	struct mc44s803_priv *priv = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	u32 r1, r2, n1, n2, lo1, lo2, freq, val;
+	int err;
+
+	priv->frequency = c->frequency;
+
+	r1 = MC44S803_OSC / 1000000;
+	r2 = MC44S803_OSC /  100000;
+
+	n1 = (c->frequency + MC44S803_IF1 + 500000) / 1000000;
+	freq = MC44S803_OSC / r1 * n1;
+	lo1 = ((60 * n1) + (r1 / 2)) / r1;
+	freq = freq - c->frequency;
+
+	n2 = (freq - MC44S803_IF2 + 50000) / 100000;
+	lo2 = ((60 * n2) + (r2 / 2)) / r2;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	val = MC44S803_REG_SM(MC44S803_REG_REFDIV, MC44S803_ADDR) |
+	      MC44S803_REG_SM(r1-1, MC44S803_R1) |
+	      MC44S803_REG_SM(r2-1, MC44S803_R2) |
+	      MC44S803_REG_SM(1, MC44S803_REFBUF_EN);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_LO1, MC44S803_ADDR) |
+	      MC44S803_REG_SM(n1-2, MC44S803_LO1);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_LO2, MC44S803_ADDR) |
+	      MC44S803_REG_SM(n2-2, MC44S803_LO2);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
+	      MC44S803_REG_SM(1, MC44S803_DA) |
+	      MC44S803_REG_SM(lo1, MC44S803_LO_REF) |
+	      MC44S803_REG_SM(1, MC44S803_AT);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
+	      MC44S803_REG_SM(2, MC44S803_DA) |
+	      MC44S803_REG_SM(lo2, MC44S803_LO_REF) |
+	      MC44S803_REG_SM(1, MC44S803_AT);
+
+	err = mc44s803_writereg(priv, val);
+	if (err)
+		goto exit;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+
+exit:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	mc_printk(KERN_WARNING, "I/O Error\n");
+	return err;
+}
+
+static int mc44s803_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct mc44s803_priv *priv = fe->tuner_priv;
+	*frequency = priv->frequency;
+	return 0;
+}
+
+static int mc44s803_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	*frequency = MC44S803_IF2; /* 36.125 MHz */
+	return 0;
+}
+
+static const struct dvb_tuner_ops mc44s803_tuner_ops = {
+	.info = {
+		.name              = "Freescale MC44S803",
+		.frequency_min_hz  =   48 * MHz,
+		.frequency_max_hz  = 1000 * MHz,
+		.frequency_step_hz =  100 * kHz,
+	},
+
+	.release       = mc44s803_release,
+	.init          = mc44s803_init,
+	.set_params    = mc44s803_set_params,
+	.get_frequency = mc44s803_get_frequency,
+	.get_if_frequency = mc44s803_get_if_frequency,
+};
+
+/* This functions tries to identify a MC44S803 tuner by reading the ID
+   register. This is hasty. */
+struct dvb_frontend *mc44s803_attach(struct dvb_frontend *fe,
+	 struct i2c_adapter *i2c, struct mc44s803_config *cfg)
+{
+	struct mc44s803_priv *priv;
+	u32 reg;
+	u8 id;
+	int ret;
+
+	reg = 0;
+
+	priv = kzalloc(sizeof(struct mc44s803_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->cfg = cfg;
+	priv->i2c = i2c;
+	priv->fe  = fe;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
+	ret = mc44s803_readreg(priv, MC44S803_REG_ID, &reg);
+	if (ret)
+		goto error;
+
+	id = MC44S803_REG_MS(reg, MC44S803_ID);
+
+	if (id != 0x14) {
+		mc_printk(KERN_ERR, "unsupported ID (%x should be 0x14)\n",
+			  id);
+		goto error;
+	}
+
+	mc_printk(KERN_INFO, "successfully identified (ID = %x)\n", id);
+	memcpy(&fe->ops.tuner_ops, &mc44s803_tuner_ops,
+	       sizeof(struct dvb_tuner_ops));
+
+	fe->tuner_priv = priv;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
+	return fe;
+
+error:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
+	kfree(priv);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(mc44s803_attach);
+
+MODULE_AUTHOR("Jochen Friedrich");
+MODULE_DESCRIPTION("Freescale MC44S803 silicon tuner driver");
+MODULE_LICENSE("GPL");