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Date: Wed, 22 Aug 2018 12:02:39 +0100
From: Ben Whitten <ben.whitten@...il.com>
To: afaerber@...e.de
Cc: starnight@...cu.edu.tw, hasnain.virk@....com,
netdev@...r.kernel.org, liuxuenetmail@...il.com, shess@...sware.de,
Ben Whitten <ben.whitten@...il.com>
Subject: [PATCH lora-next 1/3] net: lora: sx1301: convert to using regmap fields for bit ops
From: Ben Whitten <ben.whitten@...il.com>
We convert to using regmap fields to allow bit access to the registers
where regmap handles the read update write.
Signed-off-by: Ben Whitten <ben.whitten@...il.com>
---
drivers/net/lora/sx1301.c | 240 +++++++++++++---------------------------------
drivers/net/lora/sx1301.h | 46 +++++++++
2 files changed, 113 insertions(+), 173 deletions(-)
diff --git a/drivers/net/lora/sx1301.c b/drivers/net/lora/sx1301.c
index 971d234..8aad331 100644
--- a/drivers/net/lora/sx1301.c
+++ b/drivers/net/lora/sx1301.c
@@ -24,27 +24,6 @@
#include "sx1301.h"
-#define REG_PAGE_RESET_SOFT_RESET BIT(7)
-
-#define REG_16_GLOBAL_EN BIT(3)
-
-#define REG_17_CLK32M_EN BIT(0)
-
-#define REG_0_105_FORCE_HOST_RADIO_CTRL BIT(1)
-#define REG_0_105_FORCE_HOST_FE_CTRL BIT(2)
-#define REG_0_105_FORCE_DEC_FILTER_GAIN BIT(3)
-
-#define REG_0_MCU_RST_0 BIT(0)
-#define REG_0_MCU_RST_1 BIT(1)
-#define REG_0_MCU_SELECT_MUX_0 BIT(2)
-#define REG_0_MCU_SELECT_MUX_1 BIT(3)
-
-#define REG_2_43_RADIO_A_EN BIT(0)
-#define REG_2_43_RADIO_B_EN BIT(1)
-#define REG_2_43_RADIO_RST BIT(2)
-
-#define REG_EMERGENCY_FORCE_HOST_CTRL BIT(0)
-
static const struct regmap_range_cfg sx1301_regmap_ranges[] = {
{
.name = "Pages",
@@ -74,6 +53,12 @@ static struct regmap_config sx1301_regmap_config = {
.max_register = SX1301_MAX_REGISTER,
};
+static int sx1301_field_write(struct sx1301_priv *priv,
+ enum sx1301_fields field_id, u8 val)
+{
+ return regmap_field_write(priv->regmap_fields[field_id], val);
+}
+
static int sx1301_read_burst(struct sx1301_priv *priv, u8 reg, u8 *val, size_t len)
{
u8 addr = reg & 0x7f;
@@ -91,11 +76,6 @@ static int sx1301_write_burst(struct sx1301_priv *priv, u8 reg, const u8 *val, s
return spi_sync_transfer(priv->spi, xfr, 2);
}
-static int sx1301_soft_reset(struct sx1301_priv *priv)
-{
- return regmap_write(priv->regmap, SX1301_PAGE, REG_PAGE_RESET_SOFT_RESET);
-}
-
static int sx1301_agc_ram_read(struct sx1301_priv *priv, u8 addr, unsigned int *val)
{
int ret;
@@ -137,7 +117,7 @@ static int sx1301_arb_ram_read(struct sx1301_priv *priv, u8 addr, unsigned int *
static int sx1301_load_firmware(struct sx1301_priv *priv, int mcu, const struct firmware *fw)
{
u8 *buf;
- u8 rst, select_mux;
+ enum sx1301_fields rst, select_mux;
unsigned int val;
int ret;
@@ -148,29 +128,26 @@ static int sx1301_load_firmware(struct sx1301_priv *priv, int mcu, const struct
switch (mcu) {
case 0:
- rst = REG_0_MCU_RST_0;
- select_mux = REG_0_MCU_SELECT_MUX_0;
+ rst = F_MCU_RST_0;
+ select_mux = F_MCU_SELECT_MUX_0;
break;
case 1:
- rst = REG_0_MCU_RST_1;
- select_mux = REG_0_MCU_SELECT_MUX_1;
+ rst = F_MCU_RST_1;
+ select_mux = F_MCU_SELECT_MUX_1;
break;
default:
return -EINVAL;
}
- ret = regmap_read(priv->regmap, SX1301_MCU_CTRL, &val);
+ ret = sx1301_field_write(priv, rst, 1);
if (ret) {
- dev_err(priv->dev, "MCU read failed\n");
+ dev_err(priv->dev, "MCU reset failed\n");
return ret;
}
- val |= rst;
- val &= ~select_mux;
-
- ret = regmap_write(priv->regmap, SX1301_MCU_CTRL, val);
+ ret = sx1301_field_write(priv, select_mux, 0);
if (ret) {
- dev_err(priv->dev, "MCU reset / select mux write failed\n");
+ dev_err(priv->dev, "MCU RAM select mux failed\n");
return ret;
}
@@ -211,17 +188,9 @@ static int sx1301_load_firmware(struct sx1301_priv *priv, int mcu, const struct
kfree(buf);
- ret = regmap_read(priv->regmap, SX1301_MCU_CTRL, &val);
+ ret = sx1301_field_write(priv, select_mux, 1);
if (ret) {
- dev_err(priv->dev, "MCU read (1) failed\n");
- return ret;
- }
-
- val |= select_mux;
-
- ret = regmap_write(priv->regmap, SX1301_MCU_CTRL, val);
- if (ret) {
- dev_err(priv->dev, "MCU reset / select mux write (1) failed\n");
+ dev_err(priv->dev, "MCU RAM release mux failed\n");
return ret;
}
@@ -247,17 +216,9 @@ static int sx1301_agc_calibrate(struct sx1301_priv *priv)
return ret;
}
- ret = regmap_read(priv->regmap, SX1301_FORCE_CTRL, &val);
+ ret = sx1301_field_write(priv, F_FORCE_HOST_RADIO_CTRL, 0);
if (ret) {
- dev_err(priv->dev, "0|105 read failed\n");
- return ret;
- }
-
- val &= ~REG_0_105_FORCE_HOST_RADIO_CTRL;
-
- ret = regmap_write(priv->regmap, SX1301_FORCE_CTRL, val);
- if (ret) {
- dev_err(priv->dev, "0|105 write failed\n");
+ dev_err(priv->dev, "force host control failed\n");
return ret;
}
@@ -271,17 +232,9 @@ static int sx1301_agc_calibrate(struct sx1301_priv *priv)
return ret;
}
- ret = regmap_read(priv->regmap, SX1301_MCU_CTRL, &val);
+ ret = sx1301_field_write(priv, F_MCU_RST_1, 0);
if (ret) {
- dev_err(priv->dev, "MCU read (0) failed\n");
- return ret;
- }
-
- val &= ~REG_0_MCU_RST_1;
-
- ret = regmap_write(priv->regmap, SX1301_MCU_CTRL, val);
- if (ret) {
- dev_err(priv->dev, "MCU write (0) failed\n");
+ dev_err(priv->dev, "MCU 1 reset failed\n");
return ret;
}
@@ -299,34 +252,18 @@ static int sx1301_agc_calibrate(struct sx1301_priv *priv)
return -ENXIO;
}
- ret = regmap_read(priv->regmap, SX1301_EMERGENCY_FORCE_HOST_CTRL, &val);
+ ret = sx1301_field_write(priv, F_EMERGENCY_FORCE_HOST_CTRL, 0);
if (ret) {
- dev_err(priv->dev, "emergency force read failed\n");
- return ret;
- }
-
- val &= ~REG_EMERGENCY_FORCE_HOST_CTRL;
-
- ret = regmap_write(priv->regmap, SX1301_EMERGENCY_FORCE_HOST_CTRL, val);
- if (ret) {
- dev_err(priv->dev, "emergency force write failed\n");
+ dev_err(priv->dev, "emergency force failed\n");
return ret;
}
dev_err(priv->dev, "starting calibration...\n");
msleep(2300);
- ret = regmap_read(priv->regmap, SX1301_EMERGENCY_FORCE_HOST_CTRL, &val);
- if (ret) {
- dev_err(priv->dev, "emergency force read (1) failed\n");
- return ret;
- }
-
- val |= REG_EMERGENCY_FORCE_HOST_CTRL;
-
- ret = regmap_write(priv->regmap, SX1301_EMERGENCY_FORCE_HOST_CTRL, val);
+ ret = sx1301_field_write(priv, F_EMERGENCY_FORCE_HOST_CTRL, 1);
if (ret) {
- dev_err(priv->dev, "emergency force write (1) failed\n");
+ dev_err(priv->dev, "emergency force release failed\n");
return ret;
}
@@ -373,19 +310,15 @@ static int sx1301_load_all_firmware(struct sx1301_priv *priv)
if (ret)
return ret;
- ret = regmap_read(priv->regmap, SX1301_FORCE_CTRL, &val);
- if (ret) {
- dev_err(priv->dev, "0|105 read failed\n");
+ ret = sx1301_field_write(priv, F_FORCE_HOST_RADIO_CTRL, 0);
+ if (ret)
return ret;
- }
-
- val &= ~(REG_0_105_FORCE_HOST_RADIO_CTRL | REG_0_105_FORCE_HOST_FE_CTRL | REG_0_105_FORCE_DEC_FILTER_GAIN);
-
- ret = regmap_write(priv->regmap, SX1301_FORCE_CTRL, val);
- if (ret) {
- dev_err(priv->dev, "0|105 write failed\n");
+ ret = sx1301_field_write(priv, F_FORCE_HOST_FE_CTRL, 0);
+ if (ret)
+ return ret;
+ ret = sx1301_field_write(priv, F_FORCE_DEC_FILTER_GAIN, 0);
+ if (ret)
return ret;
- }
ret = regmap_write(priv->regmap, SX1301_CHRS, 0);
if (ret) {
@@ -393,17 +326,15 @@ static int sx1301_load_all_firmware(struct sx1301_priv *priv)
return ret;
}
- ret = regmap_read(priv->regmap, SX1301_MCU_CTRL, &val);
+ ret = sx1301_field_write(priv, F_MCU_RST_0, 0);
if (ret) {
- dev_err(priv->dev, "MCU read (0) failed\n");
+ dev_err(priv->dev, "MCU 0 release failed\n");
return ret;
}
- val &= ~(REG_0_MCU_RST_1 | REG_0_MCU_RST_0);
-
- ret = regmap_write(priv->regmap, SX1301_MCU_CTRL, val);
+ ret = sx1301_field_write(priv, F_MCU_RST_1, 0);
if (ret) {
- dev_err(priv->dev, "MCU write (0) failed\n");
+ dev_err(priv->dev, "MCU 1 release failed\n");
return ret;
}
@@ -455,7 +386,6 @@ static netdev_tx_t sx130x_loradev_start_xmit(struct sk_buff *skb, struct net_dev
static int sx130x_loradev_open(struct net_device *netdev)
{
struct sx1301_priv *priv = netdev_priv(netdev);
- unsigned int val;
int ret;
netdev_dbg(netdev, "%s", __func__);
@@ -465,31 +395,15 @@ static int sx130x_loradev_open(struct net_device *netdev)
return -ENXIO;
}
- ret = regmap_read(priv->regmap, SX1301_GEN, &val);
+ ret = sx1301_field_write(priv, F_GLOBAL_EN, 1);
if (ret) {
- netdev_err(netdev, "16 read (1) failed\n");
+ dev_err(priv->dev, "enable global clocks failed\n");
return ret;
}
- val |= REG_16_GLOBAL_EN;
-
- ret = regmap_write(priv->regmap, SX1301_GEN, val);
+ ret = sx1301_field_write(priv, F_CLK32M_EN, 1);
if (ret) {
- netdev_err(netdev, "16 write (1) failed\n");
- return ret;
- }
-
- ret = regmap_read(priv->regmap, SX1301_CKEN, &val);
- if (ret) {
- netdev_err(netdev, "17 read (1) failed\n");
- return ret;
- }
-
- val |= REG_17_CLK32M_EN;
-
- ret = regmap_write(priv->regmap, SX1301_CKEN, val);
- if (ret) {
- netdev_err(netdev, "17 write (1) failed\n");
+ dev_err(priv->dev, "enable 32M clock failed\n");
return ret;
}
@@ -536,6 +450,7 @@ static int sx1301_probe(struct spi_device *spi)
struct sx1301_priv *priv;
struct gpio_desc *rst;
int ret;
+ int i;
unsigned int ver;
unsigned int val;
@@ -572,6 +487,19 @@ static int sx1301_probe(struct spi_device *spi)
return ret;
}
+ for (i = 0; i < ARRAY_SIZE(sx1301_regmap_fields); i++) {
+ const struct reg_field *reg_fields = sx1301_regmap_fields;
+
+ priv->regmap_fields[i] = devm_regmap_field_alloc(&spi->dev,
+ priv->regmap,
+ reg_fields[i]);
+ if (IS_ERR(priv->regmap_fields[i])) {
+ ret = PTR_ERR(priv->regmap_fields[i]);
+ dev_err(&spi->dev, "Cannot allocate regmap field: %d\n", ret);
+ return ret;
+ }
+ }
+
ret = regmap_read(priv->regmap, SX1301_VER, &ver);
if (ret) {
dev_err(&spi->dev, "version read failed\n");
@@ -589,83 +517,49 @@ static int sx1301_probe(struct spi_device *spi)
return ret;
}
- ret = sx1301_soft_reset(priv);
+ ret = sx1301_field_write(priv, F_SOFT_RESET, 1);
if (ret) {
dev_err(&spi->dev, "soft reset failed\n");
return ret;
}
- ret = regmap_read(priv->regmap, SX1301_GEN, &val);
+ ret = sx1301_field_write(priv, F_GLOBAL_EN, 0);
if (ret) {
- dev_err(&spi->dev, "16 read failed\n");
+ dev_err(&spi->dev, "gate global clocks failed\n");
return ret;
}
- val &= ~REG_16_GLOBAL_EN;
-
- ret = regmap_write(priv->regmap, SX1301_GEN, val);
- if (ret) {
- dev_err(&spi->dev, "16 write failed\n");
- return ret;
- }
-
- ret = regmap_read(priv->regmap, SX1301_CKEN, &val);
+ ret = sx1301_field_write(priv, F_CLK32M_EN, 0);
if (ret) {
- dev_err(&spi->dev, "17 read failed\n");
+ dev_err(&spi->dev, "gate 32M clock failed\n");
return ret;
}
- val &= ~REG_17_CLK32M_EN;
-
- ret = regmap_write(priv->regmap, SX1301_CKEN, val);
+ ret = sx1301_field_write(priv, F_RADIO_A_EN, 1);
if (ret) {
- dev_err(&spi->dev, "17 write failed\n");
+ dev_err(&spi->dev, "radio a enable failed\n");
return ret;
}
- ret = regmap_read(priv->regmap, SX1301_RADIO_CFG, &val);
- if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
- return ret;
- }
-
- val |= REG_2_43_RADIO_B_EN | REG_2_43_RADIO_A_EN;
-
- ret = regmap_write(priv->regmap, SX1301_RADIO_CFG, val);
+ ret = sx1301_field_write(priv, F_RADIO_B_EN, 1);
if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ dev_err(&spi->dev, "radio b enable failed\n");
return ret;
}
msleep(500);
- ret = regmap_read(priv->regmap, SX1301_RADIO_CFG, &val);
+ ret = sx1301_field_write(priv, F_RADIO_RST, 1);
if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
- return ret;
- }
-
- val |= REG_2_43_RADIO_RST;
-
- ret = regmap_write(priv->regmap, SX1301_RADIO_CFG, val);
- if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ dev_err(&spi->dev, "radio asert reset failed\n");
return ret;
}
msleep(5);
- ret = regmap_read(priv->regmap, SX1301_RADIO_CFG, &val);
- if (ret) {
- dev_err(&spi->dev, "2|43 read failed\n");
- return ret;
- }
-
- val &= ~REG_2_43_RADIO_RST;
-
- ret = regmap_write(priv->regmap, SX1301_RADIO_CFG, val);
+ ret = sx1301_field_write(priv, F_RADIO_RST, 0);
if (ret) {
- dev_err(&spi->dev, "2|43 write failed\n");
+ dev_err(&spi->dev, "radio deasert reset failed\n");
return ret;
}
diff --git a/drivers/net/lora/sx1301.h b/drivers/net/lora/sx1301.h
index e939c02..59fcb2c 100644
--- a/drivers/net/lora/sx1301.h
+++ b/drivers/net/lora/sx1301.h
@@ -61,12 +61,58 @@
#define SX1301_MAX_REGISTER (SX1301_PAGE_BASE(3) + 0x7F)
+enum sx1301_fields {
+ F_SOFT_RESET,
+ F_GLOBAL_EN,
+ F_CLK32M_EN,
+ F_RADIO_A_EN,
+ F_RADIO_B_EN,
+ F_RADIO_RST,
+
+ F_MCU_RST_0,
+ F_MCU_RST_1,
+ F_MCU_SELECT_MUX_0,
+ F_MCU_SELECT_MUX_1,
+
+ F_FORCE_HOST_RADIO_CTRL,
+ F_FORCE_HOST_FE_CTRL,
+ F_FORCE_DEC_FILTER_GAIN,
+
+ F_EMERGENCY_FORCE_HOST_CTRL,
+};
+
+static const struct reg_field sx1301_regmap_fields[] = {
+ /* PAGE */
+ [F_SOFT_RESET] = REG_FIELD(SX1301_PAGE, 7, 7),
+ /* GEN */
+ [F_GLOBAL_EN] = REG_FIELD(SX1301_GEN, 3, 3),
+ /* CKEN */
+ [F_CLK32M_EN] = REG_FIELD(SX1301_CKEN, 0, 0),
+ /* RADIO_CFG */
+ [F_RADIO_A_EN] = REG_FIELD(SX1301_RADIO_CFG, 0, 0),
+ [F_RADIO_B_EN] = REG_FIELD(SX1301_RADIO_CFG, 1, 1),
+ [F_RADIO_RST] = REG_FIELD(SX1301_RADIO_CFG, 2, 2),
+ /* MCU_CTRL */
+ [F_MCU_RST_0] = REG_FIELD(SX1301_MCU_CTRL, 0, 0),
+ [F_MCU_RST_1] = REG_FIELD(SX1301_MCU_CTRL, 1, 1),
+ [F_MCU_SELECT_MUX_0] = REG_FIELD(SX1301_MCU_CTRL, 2, 2),
+ [F_MCU_SELECT_MUX_1] = REG_FIELD(SX1301_MCU_CTRL, 3, 3),
+ /* FORCE_CTRL */
+ [F_FORCE_HOST_RADIO_CTRL] = REG_FIELD(SX1301_FORCE_CTRL, 1, 1),
+ [F_FORCE_HOST_FE_CTRL] = REG_FIELD(SX1301_FORCE_CTRL, 2, 2),
+ [F_FORCE_DEC_FILTER_GAIN] = REG_FIELD(SX1301_FORCE_CTRL, 3, 3),
+ /* EMERGENCY_FORCE_HOST_CTRL */
+ [F_EMERGENCY_FORCE_HOST_CTRL] =
+ REG_FIELD(SX1301_EMERGENCY_FORCE_HOST_CTRL, 0, 0),
+};
+
struct sx1301_priv {
struct lora_dev_priv lora;
struct device *dev;
struct spi_device *spi;
struct gpio_desc *rst_gpio;
struct regmap *regmap;
+ struct regmap_field *regmap_fields[ARRAY_SIZE(sx1301_regmap_fields)];
};
int __init sx130x_radio_init(void);
--
2.7.4
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