From bd428bbc7527d4ea195712598c1c252ebb4554ae Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Sat, 8 Feb 2014 06:20:35 -0300 Subject: [PATCH] [media] e4000: convert to Regmap API That comes possible after driver was converted to kernel I2C model (I2C binding & proper I2C client with no gate control hack). All nasty low level I2C routines are now covered by regmap. Cc: Hans Verkuil Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/tuners/Kconfig | 1 + drivers/media/tuners/e4000.c | 212 +++++++++--------------------- drivers/media/tuners/e4000_priv.h | 2 + 3 files changed, 68 insertions(+), 147 deletions(-) diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig index 3b95392c75e6..85c0d96439a5 100644 --- a/drivers/media/tuners/Kconfig +++ b/drivers/media/tuners/Kconfig @@ -204,6 +204,7 @@ config MEDIA_TUNER_TDA18212 config MEDIA_TUNER_E4000 tristate "Elonics E4000 silicon tuner" depends on MEDIA_SUPPORT && I2C && VIDEO_V4L2 + select REGMAP_I2C default m if !MEDIA_SUBDRV_AUTOSELECT help Elonics E4000 silicon tuner driver. diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c index 29f73f61f5d3..f382b90f98b7 100644 --- a/drivers/media/tuners/e4000.c +++ b/drivers/media/tuners/e4000.c @@ -21,97 +21,6 @@ #include "e4000_priv.h" #include -/* Max transfer size done by I2C transfer functions */ -#define MAX_XFER_SIZE 64 - -/* write multiple registers */ -static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) -{ - int ret; - u8 buf[MAX_XFER_SIZE]; - struct i2c_msg msg[1] = { - { - .addr = priv->client->addr, - .flags = 0, - .len = 1 + len, - .buf = buf, - } - }; - - if (1 + len > sizeof(buf)) { - dev_warn(&priv->client->dev, - "%s: i2c wr reg=%04x: len=%d is too big!\n", - KBUILD_MODNAME, reg, len); - return -EINVAL; - } - - buf[0] = reg; - memcpy(&buf[1], val, len); - - ret = i2c_transfer(priv->client->adapter, msg, 1); - if (ret == 1) { - ret = 0; - } else { - dev_warn(&priv->client->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[MAX_XFER_SIZE]; - struct i2c_msg msg[2] = { - { - .addr = priv->client->addr, - .flags = 0, - .len = 1, - .buf = ®, - }, { - .addr = priv->client->addr, - .flags = I2C_M_RD, - .len = len, - .buf = buf, - } - }; - - if (len > sizeof(buf)) { - dev_warn(&priv->client->dev, - "%s: i2c rd reg=%04x: len=%d is too big!\n", - KBUILD_MODNAME, reg, len); - return -EINVAL; - } - - ret = i2c_transfer(priv->client->adapter, msg, 2); - if (ret == 2) { - memcpy(val, buf, len); - ret = 0; - } else { - dev_warn(&priv->client->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; @@ -120,58 +29,58 @@ static int e4000_init(struct dvb_frontend *fe) dev_dbg(&priv->client->dev, "%s:\n", __func__); /* dummy I2C to ensure I2C wakes up */ - ret = e4000_wr_reg(priv, 0x02, 0x40); + ret = regmap_write(priv->regmap, 0x02, 0x40); /* reset */ - ret = e4000_wr_reg(priv, 0x00, 0x01); + ret = regmap_write(priv->regmap, 0x00, 0x01); if (ret < 0) goto err; /* disable output clock */ - ret = e4000_wr_reg(priv, 0x06, 0x00); + ret = regmap_write(priv->regmap, 0x06, 0x00); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x7a, 0x96); + ret = regmap_write(priv->regmap, 0x7a, 0x96); if (ret < 0) goto err; /* configure gains */ - ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2); + ret = regmap_bulk_write(priv->regmap, 0x7e, "\x01\xfe", 2); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x82, 0x00); + ret = regmap_write(priv->regmap, 0x82, 0x00); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x24, 0x05); + ret = regmap_write(priv->regmap, 0x24, 0x05); if (ret < 0) goto err; - ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2); + ret = regmap_bulk_write(priv->regmap, 0x87, "\x20\x01", 2); if (ret < 0) goto err; - ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2); + ret = regmap_bulk_write(priv->regmap, 0x9f, "\x7f\x07", 2); if (ret < 0) goto err; /* DC offset control */ - ret = e4000_wr_reg(priv, 0x2d, 0x1f); + ret = regmap_write(priv->regmap, 0x2d, 0x1f); if (ret < 0) goto err; - ret = e4000_wr_regs(priv, 0x70, "\x01\x01", 2); + ret = regmap_bulk_write(priv->regmap, 0x70, "\x01\x01", 2); if (ret < 0) goto err; /* gain control */ - ret = e4000_wr_reg(priv, 0x1a, 0x17); + ret = regmap_write(priv->regmap, 0x1a, 0x17); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x1f, 0x1a); + ret = regmap_write(priv->regmap, 0x1f, 0x1a); if (ret < 0) goto err; @@ -192,7 +101,7 @@ static int e4000_sleep(struct dvb_frontend *fe) priv->active = false; - ret = e4000_wr_reg(priv, 0x00, 0x00); + ret = regmap_write(priv->regmap, 0x00, 0x00); if (ret < 0) goto err; err: @@ -216,7 +125,7 @@ static int e4000_set_params(struct dvb_frontend *fe) c->bandwidth_hz); /* gain control manual */ - ret = e4000_wr_reg(priv, 0x1a, 0x00); + ret = regmap_write(priv->regmap, 0x1a, 0x00); if (ret < 0) goto err; @@ -243,7 +152,7 @@ static int e4000_set_params(struct dvb_frontend *fe) "%s: f_vco=%llu pll div=%d sigma_delta=%04x\n", __func__, f_vco, buf[0], sigma_delta); - ret = e4000_wr_regs(priv, 0x09, buf, 5); + ret = regmap_bulk_write(priv->regmap, 0x09, buf, 5); if (ret < 0) goto err; @@ -258,7 +167,7 @@ static int e4000_set_params(struct dvb_frontend *fe) goto err; } - ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val); + ret = regmap_write(priv->regmap, 0x10, e400_lna_filter_lut[i].val); if (ret < 0) goto err; @@ -276,7 +185,7 @@ static int e4000_set_params(struct dvb_frontend *fe) 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); + ret = regmap_bulk_write(priv->regmap, 0x11, buf, 2); if (ret < 0) goto err; @@ -291,33 +200,33 @@ static int e4000_set_params(struct dvb_frontend *fe) goto err; } - ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val); + ret = regmap_write(priv->regmap, 0x07, e4000_band_lut[i].reg07_val); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val); + ret = regmap_write(priv->regmap, 0x78, e4000_band_lut[i].reg78_val); if (ret < 0) goto err; /* DC offset */ for (i = 0; i < 4; i++) { if (i == 0) - ret = e4000_wr_regs(priv, 0x15, "\x00\x7e\x24", 3); + ret = regmap_bulk_write(priv->regmap, 0x15, "\x00\x7e\x24", 3); else if (i == 1) - ret = e4000_wr_regs(priv, 0x15, "\x00\x7f", 2); + ret = regmap_bulk_write(priv->regmap, 0x15, "\x00\x7f", 2); else if (i == 2) - ret = e4000_wr_regs(priv, 0x15, "\x01", 1); + ret = regmap_bulk_write(priv->regmap, 0x15, "\x01", 1); else - ret = e4000_wr_regs(priv, 0x16, "\x7e", 1); + ret = regmap_bulk_write(priv->regmap, 0x16, "\x7e", 1); if (ret < 0) goto err; - ret = e4000_wr_reg(priv, 0x29, 0x01); + ret = regmap_write(priv->regmap, 0x29, 0x01); if (ret < 0) goto err; - ret = e4000_rd_regs(priv, 0x2a, buf, 3); + ret = regmap_bulk_read(priv->regmap, 0x2a, buf, 3); if (ret < 0) goto err; @@ -328,16 +237,16 @@ static int e4000_set_params(struct dvb_frontend *fe) swap(q_data[2], q_data[3]); swap(i_data[2], i_data[3]); - ret = e4000_wr_regs(priv, 0x50, q_data, 4); + ret = regmap_bulk_write(priv->regmap, 0x50, q_data, 4); if (ret < 0) goto err; - ret = e4000_wr_regs(priv, 0x60, i_data, 4); + ret = regmap_bulk_write(priv->regmap, 0x60, i_data, 4); if (ret < 0) goto err; /* gain control auto */ - ret = e4000_wr_reg(priv, 0x1a, 0x17); + ret = regmap_write(priv->regmap, 0x1a, 0x17); if (ret < 0) goto err; err: @@ -378,12 +287,12 @@ static int e4000_set_lna_gain(struct dvb_frontend *fe) else u8tmp = 0x10; - ret = e4000_wr_reg(priv, 0x1a, u8tmp); + ret = regmap_write(priv->regmap, 0x1a, u8tmp); if (ret) goto err; if (priv->lna_gain_auto->val == false) { - ret = e4000_wr_reg(priv, 0x14, priv->lna_gain->val); + ret = regmap_write(priv->regmap, 0x14, priv->lna_gain->val); if (ret) goto err; } @@ -410,12 +319,12 @@ static int e4000_set_mixer_gain(struct dvb_frontend *fe) else u8tmp = 0x14; - ret = e4000_wr_reg(priv, 0x20, u8tmp); + ret = regmap_write(priv->regmap, 0x20, u8tmp); if (ret) goto err; if (priv->mixer_gain_auto->val == false) { - ret = e4000_wr_reg(priv, 0x15, priv->mixer_gain->val); + ret = regmap_write(priv->regmap, 0x15, priv->mixer_gain->val); if (ret) goto err; } @@ -447,14 +356,14 @@ static int e4000_set_if_gain(struct dvb_frontend *fe) else u8tmp = 0x10; - ret = e4000_wr_reg(priv, 0x1a, u8tmp); + ret = regmap_write(priv->regmap, 0x1a, u8tmp); if (ret) goto err; if (priv->if_gain_auto->val == false) { buf[0] = e4000_if_gain_lut[priv->if_gain->val].reg16_val; buf[1] = e4000_if_gain_lut[priv->if_gain->val].reg17_val; - ret = e4000_wr_regs(priv, 0x16, buf, 2); + ret = regmap_bulk_write(priv->regmap, 0x16, buf, 2); if (ret) goto err; } @@ -469,16 +378,13 @@ static int e4000_pll_lock(struct dvb_frontend *fe) { struct e4000_priv *priv = fe->tuner_priv; int ret; - u8 u8tmp; + unsigned int utmp; - if (priv->active == false) - return 0; - - ret = e4000_rd_reg(priv, 0x07, &u8tmp); - if (ret) + ret = regmap_read(priv->regmap, 0x07, &utmp); + if (ret < 0) goto err; - priv->pll_lock->val = (u8tmp & 0x01); + priv->pll_lock->val = (utmp & 0x01); err: if (ret) dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret); @@ -488,15 +394,19 @@ static int e4000_pll_lock(struct dvb_frontend *fe) static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl) { - struct e4000_priv *priv = - container_of(ctrl->handler, struct e4000_priv, hdl); + struct e4000_priv *priv = container_of(ctrl->handler, struct e4000_priv, hdl); int ret; + if (priv->active == false) + return 0; + switch (ctrl->id) { case V4L2_CID_RF_TUNER_PLL_LOCK: ret = e4000_pll_lock(priv->fe); break; default: + dev_dbg(&priv->client->dev, "%s: unknown ctrl: id=%d name=%s\n", + __func__, ctrl->id, ctrl->name); ret = -EINVAL; } @@ -505,16 +415,13 @@ static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl) static int e4000_s_ctrl(struct v4l2_ctrl *ctrl) { - struct e4000_priv *priv = - container_of(ctrl->handler, struct e4000_priv, hdl); + struct e4000_priv *priv = container_of(ctrl->handler, struct e4000_priv, hdl); struct dvb_frontend *fe = priv->fe; struct dtv_frontend_properties *c = &fe->dtv_property_cache; int ret; - dev_dbg(&priv->client->dev, - "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n", - __func__, ctrl->id, ctrl->name, ctrl->val, - ctrl->minimum, ctrl->maximum, ctrl->step); + if (priv->active == false) + return 0; switch (ctrl->id) { case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: @@ -535,6 +442,8 @@ static int e4000_s_ctrl(struct v4l2_ctrl *ctrl) ret = e4000_set_if_gain(priv->fe); break; default: + dev_dbg(&priv->client->dev, "%s: unknown ctrl: id=%d name=%s\n", + __func__, ctrl->id, ctrl->name); ret = -EINVAL; } @@ -571,7 +480,12 @@ static int e4000_probe(struct i2c_client *client, struct dvb_frontend *fe = cfg->fe; struct e4000_priv *priv; int ret; - u8 chip_id; + unsigned int utmp; + static const struct regmap_config regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, + }; priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL); if (!priv) { @@ -583,22 +497,26 @@ static int e4000_probe(struct i2c_client *client, priv->clock = cfg->clock; priv->client = client; priv->fe = cfg->fe; + priv->regmap = devm_regmap_init_i2c(client, ®map_config); + if (IS_ERR(priv->regmap)) { + ret = PTR_ERR(priv->regmap); + goto err; + } /* check if the tuner is there */ - ret = e4000_rd_reg(priv, 0x02, &chip_id); + ret = regmap_read(priv->regmap, 0x02, &utmp); if (ret < 0) goto err; - dev_dbg(&priv->client->dev, - "%s: chip_id=%02x\n", __func__, chip_id); + dev_dbg(&priv->client->dev, "%s: chip id=%02x\n", __func__, utmp); - if (chip_id != 0x40) { + if (utmp != 0x40) { ret = -ENODEV; goto err; } /* put sleep as chip seems to be in normal mode by default */ - ret = e4000_wr_reg(priv, 0x00, 0x00); + ret = regmap_write(priv->regmap, 0x00, 0x00); if (ret < 0) goto err; diff --git a/drivers/media/tuners/e4000_priv.h b/drivers/media/tuners/e4000_priv.h index 3ddd9802ff3c..e772b00cefb9 100644 --- a/drivers/media/tuners/e4000_priv.h +++ b/drivers/media/tuners/e4000_priv.h @@ -24,9 +24,11 @@ #include "e4000.h" #include #include +#include struct e4000_priv { struct i2c_client *client; + struct regmap *regmap; u32 clock; struct dvb_frontend *fe; struct v4l2_subdev sd; -- GitLab