Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 "The first part of the media updates for Kernel 3.7.

  This series contain:

   - A major tree renaming patch series: now, drivers are organized
     internally by their used bus, instead of by V4L2 and/or DVB API,
     providing a cleaner driver location for hybrid drivers that
     implement both APIs, and allowing to cleanup the Kconfig items and
     make them more intuitive for the end user;

   - Media Kernel developers are typically very lazy with their duties
     of keeping the MAINTAINERS entries for their drivers updated.  As
     now the tree is more organized, we're doing an effort to add/update
     those entries for the drivers that aren't currently orphan;

   - Several DVB USB drivers got moved to a new DVB USB v2 core; the new
     core fixes several bugs (as the existing one that got bitroted).
     Now, suspend/resume finally started to work fine (at least with
     some devices - we should expect more work with regards to it);

   - added multistream support for DVB-T2, and unified the API for
     DVB-S2 and ISDB-S.  Backward binary support is preserved;

   - as usual, a few new drivers, some V4L2 core improvements and lots
     of drivers improvements and fixes.

  There are some points to notice on this series:

   1) you should expect a trivial merge conflict on your tree, with the
      removal of Documentation/feature-removal-schedule.txt: this series
      would be adding two additional entries there.  I opted to not
      rebase it due to this recent change;

   2) With regards to the PCTV 520e udev-related breakage, I opted to
      fix it in a way that the patches can be backported to 3.5 even
      without your firmware fix patch.  This way, Greg doesn't need to
      rush backporting your patch (as there are still the firmware cache
      and firmware path customization issues to be addressed there).

      I'll send later a patch (likely after the end of the merge window)
      reverting the rest of the DRX-K async firmware request, fully
      restoring its original behaviour to allow media drivers to
      initialize everything serialized as before for 3.7 and upper.

   3) I'm planning to work on this weekend to test the DMABUF patches
      for V4L2.  The patches are on my queue for several Kernel cycles,
      but, up to now, there is/was no way to test the series locally.

      I have some concerns about this particular changeset with regards
      to security issues, and with regards to the replacement of the old
      VIDIOC_OVERLAY ioctl's that is broken on modern systems, due to
      GPU drivers change.  The Overlay API allows direct PCI2PCI
      transfers from a media capture card into the GPU framebuffer, but
      its API is crappy.  Also, the only existing X11 driver that
      implements it requires a XV extension that is not available
      anymore on modern drivers.  The DMABUF can do the same thing, but
      with it is promising to be a properly-designed API.  If I can
      successfully test this series and be happy with it, I should be
      asking you to pull them next week."

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (717 commits)
  em28xx: regression fix: use DRX-K sync firmware requests on em28xx
  drxk: allow loading firmware synchrousnously
  em28xx: Make all em28xx extensions to be initialized asynchronously
  [media] tda18271: properly report read errors in tda18271_get_id
  [media] tda18271: delay IR & RF calibration until init() if delay_cal is set
  [media] MAINTAINERS: add Michael Krufky as tda827x maintainer
  [media] MAINTAINERS: add Michael Krufky as tda8290 maintainer
  [media] MAINTAINERS: add Michael Krufky as cxusb maintainer
  [media] MAINTAINERS: add Michael Krufky as lg2160 maintainer
  [media] MAINTAINERS: add Michael Krufky as lgdt3305 maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl111sf maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl5007t maintainer
  [media] MAINTAINERS: add Michael Krufky as tda18271 maintainer
  [media] s5p-tv: Report only multi-plane capabilities in vidioc_querycap
  [media] s5p-mfc: Fix misplaced return statement in s5p_mfc_suspend()
  [media] exynos-gsc: Add missing static storage class specifiers
  [media] exynos-gsc: Remove <linux/version.h> header file inclusion
  [media] s5p-fimc: Fix incorrect condition in fimc_lite_reqbufs()
  [media] s5p-tv: Fix potential NULL pointer dereference error
  [media] s5k6aa: Fix possible NULL pointer dereference
  ...

1 files changed, 409 insertions, 0 deletions

diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
new file mode 100644
index 00000000000..1b33ed368ab
--- /dev/null
+++ b/drivers/media/tuners/e4000.c
@@ -0,0 +1,409 @@
+/*
+ * Elonics E4000 silicon tuner driver
+ *
+ * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
+ *
+ *    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.,
+ *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "e4000_priv.h"
+
+/* write multiple registers */
+static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
+{
+	int ret;
+	u8 buf[1 + len];
+	struct i2c_msg msg[1] = {
+		{
+			.addr = priv->cfg->i2c_addr,
+			.flags = 0,
+			.len = sizeof(buf),
+			.buf = buf,
+		}
+	};
+
+	buf[0] = reg;
+	memcpy(&buf[1], val, len);
+
+	ret = i2c_transfer(priv->i2c, msg, 1);
+	if (ret == 1) {
+		ret = 0;
+	} else {
+		dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
+				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
+		ret = -EREMOTEIO;
+	}
+	return ret;
+}
+
+/* read multiple registers */
+static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
+{
+	int ret;
+	u8 buf[len];
+	struct i2c_msg msg[2] = {
+		{
+			.addr = priv->cfg->i2c_addr,
+			.flags = 0,
+			.len = 1,
+			.buf = &reg,
+		}, {
+			.addr = priv->cfg->i2c_addr,
+			.flags = I2C_M_RD,
+			.len = sizeof(buf),
+			.buf = buf,
+		}
+	};
+
+	ret = i2c_transfer(priv->i2c, msg, 2);
+	if (ret == 2) {
+		memcpy(val, buf, len);
+		ret = 0;
+	} else {
+		dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
+				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
+		ret = -EREMOTEIO;
+	}
+
+	return ret;
+}
+
+/* write single register */
+static int e4000_wr_reg(struct e4000_priv *priv, u8 reg, u8 val)
+{
+	return e4000_wr_regs(priv, reg, &val, 1);
+}
+
+/* read single register */
+static int e4000_rd_reg(struct e4000_priv *priv, u8 reg, u8 *val)
+{
+	return e4000_rd_regs(priv, reg, val, 1);
+}
+
+static int e4000_init(struct dvb_frontend *fe)
+{
+	struct e4000_priv *priv = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	/* dummy I2C to ensure I2C wakes up */
+	ret = e4000_wr_reg(priv, 0x02, 0x40);
+
+	/* reset */
+	ret = e4000_wr_reg(priv, 0x00, 0x01);
+	if (ret < 0)
+		goto err;
+
+	/* disable output clock */
+	ret = e4000_wr_reg(priv, 0x06, 0x00);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x7a, 0x96);
+	if (ret < 0)
+		goto err;
+
+	/* configure gains */
+	ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x82, 0x00);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x24, 0x05);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2);
+	if (ret < 0)
+		goto err;
+
+	/*
+	 * TODO: Implement DC offset control correctly.
+	 * DC offsets has quite much effect for received signal quality in case
+	 * of direct conversion tuners (Zero-IF). Surely we will now lose few
+	 * decimals or even decibels from SNR...
+	 */
+	/* DC offset control */
+	ret = e4000_wr_reg(priv, 0x2d, 0x0c);
+	if (ret < 0)
+		goto err;
+
+	/* gain control */
+	ret = e4000_wr_reg(priv, 0x1a, 0x17);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x1f, 0x1a);
+	if (ret < 0)
+		goto err;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+err:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int e4000_sleep(struct dvb_frontend *fe)
+{
+	struct e4000_priv *priv = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	ret = e4000_wr_reg(priv, 0x00, 0x00);
+	if (ret < 0)
+		goto err;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+err:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int e4000_set_params(struct dvb_frontend *fe)
+{
+	struct e4000_priv *priv = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret, i, sigma_delta;
+	unsigned int f_VCO;
+	u8 buf[5];
+
+	dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \
+			"bandwidth_hz=%d\n", __func__,
+			c->delivery_system, c->frequency, c->bandwidth_hz);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	/* gain control manual */
+	ret = e4000_wr_reg(priv, 0x1a, 0x00);
+	if (ret < 0)
+		goto err;
+
+	/* PLL */
+	for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
+		if (c->frequency <= e4000_pll_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_pll_lut))
+		goto err;
+
+	/*
+	 * Note: Currently f_VCO overflows when c->frequency is 1 073 741 824 Hz
+	 * or more.
+	 */
+	f_VCO = c->frequency * e4000_pll_lut[i].mul;
+	sigma_delta = 0x10000UL * (f_VCO % priv->cfg->clock) / priv->cfg->clock;
+	buf[0] = f_VCO / priv->cfg->clock;
+	buf[1] = (sigma_delta >> 0) & 0xff;
+	buf[2] = (sigma_delta >> 8) & 0xff;
+	buf[3] = 0x00;
+	buf[4] = e4000_pll_lut[i].div;
+
+	dev_dbg(&priv->i2c->dev, "%s: f_VCO=%u pll div=%d sigma_delta=%04x\n",
+			__func__, f_VCO, buf[0], sigma_delta);
+
+	ret = e4000_wr_regs(priv, 0x09, buf, 5);
+	if (ret < 0)
+		goto err;
+
+	/* LNA filter (RF filter) */
+	for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
+		if (c->frequency <= e400_lna_filter_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e400_lna_filter_lut))
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val);
+	if (ret < 0)
+		goto err;
+
+	/* IF filters */
+	for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
+		if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_if_filter_lut))
+		goto err;
+
+	buf[0] = e4000_if_filter_lut[i].reg11_val;
+	buf[1] = e4000_if_filter_lut[i].reg12_val;
+
+	ret = e4000_wr_regs(priv, 0x11, buf, 2);
+	if (ret < 0)
+		goto err;
+
+	/* frequency band */
+	for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
+		if (c->frequency <= e4000_band_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_band_lut))
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val);
+	if (ret < 0)
+		goto err;
+
+	ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val);
+	if (ret < 0)
+		goto err;
+
+	/* gain control auto */
+	ret = e4000_wr_reg(priv, 0x1a, 0x17);
+	if (ret < 0)
+		goto err;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+err:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct e4000_priv *priv = fe->tuner_priv;
+
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	*frequency = 0; /* Zero-IF */
+
+	return 0;
+}
+
+static int e4000_release(struct dvb_frontend *fe)
+{
+	struct e4000_priv *priv = fe->tuner_priv;
+
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	kfree(fe->tuner_priv);
+
+	return 0;
+}
+
+static const struct dvb_tuner_ops e4000_tuner_ops = {
+	.info = {
+		.name           = "Elonics E4000",
+		.frequency_min  = 174000000,
+		.frequency_max  = 862000000,
+	},
+
+	.release = e4000_release,
+
+	.init = e4000_init,
+	.sleep = e4000_sleep,
+	.set_params = e4000_set_params,
+
+	.get_if_frequency = e4000_get_if_frequency,
+};
+
+struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
+		struct i2c_adapter *i2c, const struct e4000_config *cfg)
+{
+	struct e4000_priv *priv;
+	int ret;
+	u8 chip_id;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);
+	if (!priv) {
+		ret = -ENOMEM;
+		dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+		goto err;
+	}
+
+	priv->cfg = cfg;
+	priv->i2c = i2c;
+
+	/* check if the tuner is there */
+	ret = e4000_rd_reg(priv, 0x02, &chip_id);
+	if (ret < 0)
+		goto err;
+
+	dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);
+
+	if (chip_id != 0x40)
+		goto err;
+
+	/* put sleep as chip seems to be in normal mode by default */
+	ret = e4000_wr_reg(priv, 0x00, 0x00);
+	if (ret < 0)
+		goto err;
+
+	dev_info(&priv->i2c->dev,
+			"%s: Elonics E4000 successfully identified\n",
+			KBUILD_MODNAME);
+
+	fe->tuner_priv = priv;
+	memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
+			sizeof(struct dvb_tuner_ops));
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return fe;
+err:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+	kfree(priv);
+	return NULL;
+}
+EXPORT_SYMBOL(e4000_attach);
+
+MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");