From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from stevekez.vm.bytemark.co.uk ([80.68.91.30]:36917 "EHLO stevekerrison.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754407Ab1HGSO6 (ORCPT ); Sun, 7 Aug 2011 14:14:58 -0400 From: Steve Kerrison To: linux-media@vger.kernel.org Cc: crope@iki.fi, robert_s@gmx.net, Steve Kerrison Subject: [PATCH] CXD2820R: Replace i2c message translation with repeater gate control Date: Sun, 7 Aug 2011 19:08:09 +0100 Message-Id: <1312740489-17225-1-git-send-email-steve@stevekerrison.com> In-Reply-To: <4E32AD92.8060500@iki.fi> References: <4E32AD92.8060500@iki.fi> Sender: linux-media-owner@vger.kernel.org List-ID: This patch implements an i2c_gate_ctrl op for the cxd2820r. Thanks to Robert Schlabbach for identifying the register address and field to set. The old i2c intercept code that prefixed messages with a passthrough byte has been removed and the PCTV nanoStick T2 290e entry in em28xx-dvb has been updated appropriately. Tested for DVB-T2 use; I would appreciate it if somebody with DVB-C capabilities could test it as well - from inspection I cannot see any problems. Signed-off-by: Steve Kerrison --- drivers/media/dvb/frontends/cxd2820r_core.c | 73 +++------------------------ drivers/media/dvb/frontends/cxd2820r_priv.h | 1 - drivers/media/video/em28xx/em28xx-dvb.c | 7 +-- 3 files changed, 10 insertions(+), 71 deletions(-) diff --git a/drivers/media/dvb/frontends/cxd2820r_core.c b/drivers/media/dvb/frontends/cxd2820r_core.c index d416e85..15bfcf4 100644 --- a/drivers/media/dvb/frontends/cxd2820r_core.c +++ b/drivers/media/dvb/frontends/cxd2820r_core.c @@ -728,69 +728,20 @@ static void cxd2820r_release(struct dvb_frontend *fe) dbg("%s", __func__); if (fe->ops.info.type == FE_OFDM) { - i2c_del_adapter(&priv->tuner_i2c_adapter); kfree(priv); } return; } -static u32 cxd2820r_tuner_i2c_func(struct i2c_adapter *adapter) -{ - return I2C_FUNC_I2C; -} - -static int cxd2820r_tuner_i2c_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg msg[], int num) -{ - struct cxd2820r_priv *priv = i2c_get_adapdata(i2c_adap); - int ret; - u8 *obuf = kmalloc(msg[0].len + 2, GFP_KERNEL); - struct i2c_msg msg2[2] = { - { - .addr = priv->cfg.i2c_address, - .flags = 0, - .len = msg[0].len + 2, - .buf = obuf, - }, { - .addr = priv->cfg.i2c_address, - .flags = I2C_M_RD, - .len = msg[1].len, - .buf = msg[1].buf, - } - }; - - if (!obuf) - return -ENOMEM; - - obuf[0] = 0x09; - obuf[1] = (msg[0].addr << 1); - if (num == 2) { /* I2C read */ - obuf[1] = (msg[0].addr << 1) | I2C_M_RD; /* I2C RD flag */ - msg2[0].len = msg[0].len + 2 - 1; /* '-1' maybe HW bug ? */ - } - memcpy(&obuf[2], msg[0].buf, msg[0].len); - - ret = i2c_transfer(priv->i2c, msg2, num); - if (ret < 0) - warn("tuner i2c failed ret:%d", ret); - - kfree(obuf); - - return ret; -} - -static struct i2c_algorithm cxd2820r_tuner_i2c_algo = { - .master_xfer = cxd2820r_tuner_i2c_xfer, - .functionality = cxd2820r_tuner_i2c_func, -}; - -struct i2c_adapter *cxd2820r_get_tuner_i2c_adapter(struct dvb_frontend *fe) +static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) { struct cxd2820r_priv *priv = fe->demodulator_priv; - return &priv->tuner_i2c_adapter; + dbg("%s: %d", __func__, enable); + + /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */ + return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1); } -EXPORT_SYMBOL(cxd2820r_get_tuner_i2c_adapter); static struct dvb_frontend_ops cxd2820r_ops[2]; @@ -831,18 +782,6 @@ struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg, priv->fe[0].demodulator_priv = priv; priv->fe[1].demodulator_priv = priv; - /* create tuner i2c adapter */ - strlcpy(priv->tuner_i2c_adapter.name, - "CXD2820R tuner I2C adapter", - sizeof(priv->tuner_i2c_adapter.name)); - priv->tuner_i2c_adapter.algo = &cxd2820r_tuner_i2c_algo; - priv->tuner_i2c_adapter.algo_data = NULL; - i2c_set_adapdata(&priv->tuner_i2c_adapter, priv); - if (i2c_add_adapter(&priv->tuner_i2c_adapter) < 0) { - err("tuner I2C bus could not be initialized"); - goto error; - } - return &priv->fe[0]; } else { @@ -883,6 +822,7 @@ static struct dvb_frontend_ops cxd2820r_ops[2] = { .sleep = cxd2820r_sleep, .get_tune_settings = cxd2820r_get_tune_settings, + .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl, .get_frontend = cxd2820r_get_frontend, @@ -911,6 +851,7 @@ static struct dvb_frontend_ops cxd2820r_ops[2] = { .sleep = cxd2820r_sleep, .get_tune_settings = cxd2820r_get_tune_settings, + .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl, .set_frontend = cxd2820r_set_frontend, .get_frontend = cxd2820r_get_frontend, diff --git a/drivers/media/dvb/frontends/cxd2820r_priv.h b/drivers/media/dvb/frontends/cxd2820r_priv.h index 0c0ebc9..9553913 100644 --- a/drivers/media/dvb/frontends/cxd2820r_priv.h +++ b/drivers/media/dvb/frontends/cxd2820r_priv.h @@ -50,7 +50,6 @@ struct cxd2820r_priv { struct i2c_adapter *i2c; struct dvb_frontend fe[2]; struct cxd2820r_config cfg; - struct i2c_adapter tuner_i2c_adapter; struct mutex fe_lock; /* FE lock */ int active_fe:2; /* FE lock, -1=NONE, 0=DVB-T/T2, 1=DVB-C */ diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c index e5916de..223a2fc 100644 --- a/drivers/media/video/em28xx/em28xx-dvb.c +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -438,6 +438,7 @@ static struct cxd2820r_config em28xx_cxd2820r_config = { static struct tda18271_config em28xx_cxd2820r_tda18271_config = { .output_opt = TDA18271_OUTPUT_LT_OFF, + .gate = TDA18271_GATE_DIGITAL, }; /* ------------------------------------------------------------------ */ @@ -753,11 +754,9 @@ static int dvb_init(struct em28xx *dev) dvb->fe[0] = dvb_attach(cxd2820r_attach, &em28xx_cxd2820r_config, &dev->i2c_adap, NULL); if (dvb->fe[0]) { - struct i2c_adapter *i2c_tuner; - i2c_tuner = cxd2820r_get_tuner_i2c_adapter(dvb->fe[0]); /* FE 0 attach tuner */ if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60, - i2c_tuner, &em28xx_cxd2820r_tda18271_config)) { + &dev->i2c_adap, &em28xx_cxd2820r_tda18271_config)) { dvb_frontend_detach(dvb->fe[0]); result = -EINVAL; goto out_free; @@ -768,7 +767,7 @@ static int dvb_init(struct em28xx *dev) dvb->fe[1]->id = 1; /* FE 1 attach tuner */ if (!dvb_attach(tda18271_attach, dvb->fe[1], 0x60, - i2c_tuner, &em28xx_cxd2820r_tda18271_config)) { + &dev->i2c_adap, &em28xx_cxd2820r_tda18271_config)) { dvb_frontend_detach(dvb->fe[1]); /* leave FE 0 still active */ } -- 1.7.1