// SPI to CAN driver for the Texas Instruments TCAN4x5x
// Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/
-#include <linux/regmap.h>
-#include <linux/spi/spi.h>
-
-#include <linux/regulator/consumer.h>
-#include <linux/gpio/consumer.h>
-
-#include "m_can.h"
+#include "tcan4x5x.h"
#define TCAN4X5X_EXT_CLK_DEF 40000000
#define TCAN4X5X_MRAM_START 0x8000
#define TCAN4X5X_MCAN_OFFSET 0x1000
-#define TCAN4X5X_MAX_REGISTER 0x8fff
#define TCAN4X5X_CLEAR_ALL_INT 0xffffffff
#define TCAN4X5X_SET_ALL_INT 0xffffffff
-#define TCAN4X5X_WRITE_CMD (0x61 << 24)
-#define TCAN4X5X_READ_CMD (0x41 << 24)
-
#define TCAN4X5X_MODE_SEL_MASK (BIT(7) | BIT(6))
#define TCAN4X5X_MODE_SLEEP 0x00
#define TCAN4X5X_MODE_STANDBY BIT(6)
#define TCAN4X5X_WD_3_S_TIMER BIT(29)
#define TCAN4X5X_WD_6_S_TIMER (BIT(28) | BIT(29))
-struct tcan4x5x_priv {
- struct m_can_classdev cdev;
-
- struct regmap *regmap;
- struct spi_device *spi;
-
- struct gpio_desc *reset_gpio;
- struct gpio_desc *device_wake_gpio;
- struct gpio_desc *device_state_gpio;
- struct regulator *power;
-};
-
static inline struct tcan4x5x_priv *cdev_to_priv(struct m_can_classdev *cdev)
{
return container_of(cdev, struct tcan4x5x_priv, cdev);
return ret;
}
-static int regmap_spi_gather_write(void *context, const void *reg,
- size_t reg_len, const void *val,
- size_t val_len)
-{
- struct device *dev = context;
- struct spi_device *spi = to_spi_device(dev);
- struct spi_message m;
- u32 addr;
- struct spi_transfer t[2] = {
- { .tx_buf = &addr, .len = reg_len, .cs_change = 0,},
- { .tx_buf = val, .len = val_len, },
- };
-
- addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 2;
-
- spi_message_init(&m);
- spi_message_add_tail(&t[0], &m);
- spi_message_add_tail(&t[1], &m);
-
- return spi_sync(spi, &m);
-}
-
-static int tcan4x5x_regmap_write(void *context, const void *data, size_t count)
-{
- u16 *reg = (u16 *)(data);
- const u32 *val = data + 4;
-
- return regmap_spi_gather_write(context, reg, 4, val, count - 4);
-}
-
-static int regmap_spi_async_write(void *context,
- const void *reg, size_t reg_len,
- const void *val, size_t val_len,
- struct regmap_async *a)
-{
- return -ENOTSUPP;
-}
-
-static struct regmap_async *regmap_spi_async_alloc(void)
-{
- return NULL;
-}
-
-static int tcan4x5x_regmap_read(void *context,
- const void *reg, size_t reg_size,
- void *val, size_t val_size)
-{
- struct device *dev = context;
- struct spi_device *spi = to_spi_device(dev);
-
- u32 addr = TCAN4X5X_READ_CMD | (*((u16 *)reg) << 8) | val_size >> 2;
-
- return spi_write_then_read(spi, &addr, reg_size, (u32 *)val, val_size);
-}
-
-static struct regmap_bus tcan4x5x_bus = {
- .write = tcan4x5x_regmap_write,
- .gather_write = regmap_spi_gather_write,
- .async_write = regmap_spi_async_write,
- .async_alloc = regmap_spi_async_alloc,
- .read = tcan4x5x_regmap_read,
- .read_flag_mask = 0x00,
- .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
- .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
-};
-
static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
{
struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
return 0;
}
-static const struct regmap_config tcan4x5x_regmap = {
- .reg_bits = 32,
- .val_bits = 32,
- .cache_type = REGCACHE_NONE,
- .max_register = TCAN4X5X_MAX_REGISTER,
-};
-
static struct m_can_ops tcan4x5x_ops = {
.init = tcan4x5x_init,
.read_reg = tcan4x5x_read_reg,
if (ret)
goto out_m_can_class_free_dev;
- priv->regmap = devm_regmap_init(&spi->dev, &tcan4x5x_bus,
- &spi->dev, &tcan4x5x_regmap);
- if (IS_ERR(priv->regmap)) {
- ret = PTR_ERR(priv->regmap);
+ ret = tcan4x5x_regmap_init(priv);
+ if (ret)
goto out_m_can_class_free_dev;
- }
ret = tcan4x5x_power_enable(priv->power, 1);
if (ret)
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// tcan4x5x - Texas Instruments TCAN4x5x Family CAN controller driver
+//
+// Copyright (c) 2020 Pengutronix,
+// Marc Kleine-Budde <kernel@pengutronix.de>
+// Copyright (c) 2018-2019 Texas Instruments Incorporated
+// http://www.ti.com/
+
+#include "tcan4x5x.h"
+
+#define TCAN4X5X_WRITE_CMD (0x61 << 24)
+#define TCAN4X5X_READ_CMD (0x41 << 24)
+
+#define TCAN4X5X_MAX_REGISTER 0x8fff
+
+static int regmap_spi_gather_write(void *context, const void *reg,
+ size_t reg_len, const void *val,
+ size_t val_len)
+{
+ struct device *dev = context;
+ struct spi_device *spi = to_spi_device(dev);
+ struct spi_message m;
+ u32 addr;
+ struct spi_transfer t[2] = {
+ { .tx_buf = &addr, .len = reg_len, .cs_change = 0,},
+ { .tx_buf = val, .len = val_len, },
+ };
+
+ addr = TCAN4X5X_WRITE_CMD | (*((u16 *)reg) << 8) | val_len >> 2;
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t[0], &m);
+ spi_message_add_tail(&t[1], &m);
+
+ return spi_sync(spi, &m);
+}
+
+static int tcan4x5x_regmap_write(void *context, const void *data, size_t count)
+{
+ u16 *reg = (u16 *)(data);
+ const u32 *val = data + 4;
+
+ return regmap_spi_gather_write(context, reg, 4, val, count - 4);
+}
+
+static int regmap_spi_async_write(void *context,
+ const void *reg, size_t reg_len,
+ const void *val, size_t val_len,
+ struct regmap_async *a)
+{
+ return -ENOTSUPP;
+}
+
+static struct regmap_async *regmap_spi_async_alloc(void)
+{
+ return NULL;
+}
+
+static int tcan4x5x_regmap_read(void *context,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct device *dev = context;
+ struct spi_device *spi = to_spi_device(dev);
+
+ u32 addr = TCAN4X5X_READ_CMD | (*((u16 *)reg) << 8) | val_size >> 2;
+
+ return spi_write_then_read(spi, &addr, reg_size, (u32 *)val, val_size);
+}
+
+static const struct regmap_config tcan4x5x_regmap = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .cache_type = REGCACHE_NONE,
+ .max_register = TCAN4X5X_MAX_REGISTER,
+};
+
+static struct regmap_bus tcan4x5x_bus = {
+ .write = tcan4x5x_regmap_write,
+ .gather_write = regmap_spi_gather_write,
+ .async_write = regmap_spi_async_write,
+ .async_alloc = regmap_spi_async_alloc,
+ .read = tcan4x5x_regmap_read,
+ .read_flag_mask = 0x00,
+ .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+ .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+};
+
+int tcan4x5x_regmap_init(struct tcan4x5x_priv *priv)
+{
+ priv->regmap = devm_regmap_init(&priv->spi->dev, &tcan4x5x_bus,
+ &priv->spi->dev, &tcan4x5x_regmap);
+ return PTR_ERR_OR_ZERO(priv->regmap);
+}
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