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S32K1XX: Add LPI2C slave support

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This commit is contained in:
Jari van Ewijk
2021-09-22 10:26:45 +02:00
committed by Xiang Xiao
parent 962059f843
commit bbb2f1f8c7
5 changed files with 1086 additions and 47 deletions
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arch/arm/src/s32k1xx/Kconfig
+40 -6
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@@ -272,12 +272,12 @@ config S32K1XX_FTM7
select S32K1XX_FTM
depends on S32K1XX_HAVE_FTM7
menuconfig S32K1XX_LPI2C0
config S32K1XX_LPI2C0
bool "LPI2C0"
default n
select S32K1XX_LPI2C
menuconfig S32K1XX_LPI2C1
config S32K1XX_LPI2C1
bool "LPI2C1"
default n
select S32K1XX_LPI2C
@@ -627,7 +627,7 @@ config S32K1XX_LPSPI_DWORD
endmenu # LPSPI Configuration
menu "LPI2C0 Configuration"
menu "LPI2C0 Master Configuration"
depends on S32K1XX_LPI2C0
config LPI2C0_BUSYIDLE
@@ -642,9 +642,26 @@ config LPI2C0_FILTSDA
int "I2C master digital glitch filters for SDA input in clock cycles"
default 0
endmenu # LPI2C0 Configuration
endmenu # LPI2C0 Master Configuration
menu "LPI2C1 Configuration"
menu "LPI2C0 Slave Configuration"
depends on S32K1XX_LPI2C0
config LPI2C0_SLAVE_ADDRESS
int "7-bit I2C address in decimal"
default 8
range 8 119
config LPI2C0_SLAVE_BUS
bool "Separate I2C slave bus"
default n
---help---
When selected, the LPI2C slave will use separate SDA/SCL pins from
the LPI2C master. These pins need to be defined in the board.h.
endmenu # LPI2C0 Slave Configuration
menu "LPI2C1 Master Configuration"
depends on S32K1XX_LPI2C1
config LPI2C1_BUSYIDLE
@@ -659,7 +676,24 @@ config LPI2C1_FILTSDA
int "I2C master digital glitch filters for SDA input in clock cycles"
default 0
endmenu # LPI2C1 Configuration
endmenu # LPI2C1 Master Configuration
menu "LPI2C1 Slave Configuration"
depends on S32K1XX_LPI2C1
config LPI2C1_SLAVE_ADDRESS
int "7-bit I2C address in decimal"
default 9
range 8 119
config LPI2C1_SLAVE_BUS
bool "Separate I2C slave bus"
default n
---help---
When selected, the LPI2C slave will use separate SDA/SCL pins from
the LPI2C master. These pins need to be defined in the board.h.
endmenu # LPI2C1 Slave Configuration
menu "Ethernet Configuration"
depends on S32K1XX_ENET
arch/arm/src/s32k1xx/Make.defs
+1
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@@ -67,6 +67,7 @@ endif
ifeq ($(CONFIG_S32K1XX_LPI2C),y)
CHIP_CSRCS += s32k1xx_lpi2c.c
CHIP_CSRCS += s32k1xx_lpi2c_slave.c
endif
ifeq ($(CONFIG_S32K1XX_LPSPI),y)
arch/arm/src/s32k1xx/s32k1xx_lpi2c.c
+24 -41
View File
@@ -105,22 +105,11 @@
# define CONFIG_I2C_NTRACE 32
#endif
#ifdef CONFIG_I2C_SLAVE
# error I2C slave logic is not supported yet for S32K1XX
#endif
#define LPI2C_MASTER 1
#define LPI2C_SLAVE 2
#define MKI2C_OUTPUT(p) (((p) & GPIO_PADMUX_MASK) | \
IOMUX_OPENDRAIN | IOMUX_DRIVE_33OHM | \
IOMUX_SLEW_SLOW | (5 << GPIO_ALT_SHIFT) | \
IOMUX_PULL_NONE | GPIO_OUTPUT_ONE)
#define MKI2C_INPUT(p) (((p) & GPIO_PADMUX_MASK) | \
IOMUX_DRIVE_HIZ | IOMUX_SLEW_SLOW | \
IOMUX_CMOS_INPUT | (5 << GPIO_ALT_SHIFT) | \
IOMUX_PULL_NONE)
#define MKI2C_OUTPUT(p) (((p) & (~_PIN_MODE_MASK)) | GPIO_OUTPUT | GPIO_OUTPUT_ONE)
#define MKI2C_INPUT(p) (((p) & (~_PIN_MODE_MASK)) | GPIO_INPUT)
/****************************************************************************
* Private Types
@@ -142,10 +131,10 @@ enum s32k1xx_trace_e
I2CEVENT_NONE = 0, /* No events have occurred with this status */
I2CEVENT_SENDADDR, /* Start/Master bit set and address sent, param = msgc */
I2CEVENT_SENDBYTE, /* Send byte, param = dcnt */
I2CEVENT_RCVBYTE, /* Read more dta, param = dcnt */
I2CEVENT_RCVBYTE, /* Read more data, param = dcnt */
I2CEVENT_NOSTART, /* BTF on last byte with no restart, param = msgc */
I2CEVENT_STARTRESTART, /* Last byte sent, re-starting, param = msgc */
I2CEVENT_STOP, /* Last byte sten, send stop, param = 0 */
I2CEVENT_STOP, /* Last byte sent, send stop, param = 0 */
I2CEVENT_ERROR /* Error occurred, param = 0 */
};
@@ -160,7 +149,7 @@ struct s32k1xx_trace_s
clock_t time; /* First of event or first status */
};
/* I2C Device hardware configuration */
/* I2C device hardware configuration */
struct s32k1xx_lpi2c_config_s
{
@@ -270,7 +259,7 @@ static inline void
static inline uint32_t
s32k1xx_lpi2c_getstatus(FAR struct s32k1xx_lpi2c_priv_s *priv);
static int s32k1xx_lpi2c_isr_process(struct s32k1xx_lpi2c_priv_s * priv);
static int s32k1xx_lpi2c_isr_process(struct s32k1xx_lpi2c_priv_s *priv);
#ifndef CONFIG_I2C_POLLED
static int s32k1xx_lpi2c_isr(int irq, void *context, FAR void *arg);
@@ -308,9 +297,9 @@ static const char *g_trace_names[] =
static const struct i2c_ops_s s32k1xx_lpi2c_ops =
{
.transfer = s32k1xx_lpi2c_transfer
.transfer = s32k1xx_lpi2c_transfer,
#ifdef CONFIG_I2C_RESET
, .reset = s32k1xx_lpi2c_reset
.reset = s32k1xx_lpi2c_reset,
#endif
};
@@ -325,11 +314,7 @@ static const struct s32k1xx_lpi2c_config_s s32k1xx_lpi2c0_config =
.filtsda = CONFIG_LPI2C0_FILTSDA,
.scl_pin = PIN_LPI2C0_SCL,
.sda_pin = PIN_LPI2C0_SDA,
#ifndef CONFIG_I2C_SLAVE
.mode = LPI2C_MASTER,
#else
.mode = LPI2C_SLAVE,
#endif
#ifndef CONFIG_I2C_POLLED
.irq = S32K1XX_IRQ_LPI2C0M,
#endif
@@ -346,9 +331,9 @@ static struct s32k1xx_lpi2c_priv_s s32k1xx_lpi2c0_priv =
.ptr = NULL,
.dcnt = 0,
.flags = 0,
.status = 0
.status = 0,
};
#endif
#endif /* CONFIG_S32K1XX_LPI2C0 */
#ifdef CONFIG_S32K1XX_LPI2C1
static const struct s32k1xx_lpi2c_config_s s32k1xx_lpi2c1_config =
@@ -359,11 +344,7 @@ static const struct s32k1xx_lpi2c_config_s s32k1xx_lpi2c1_config =
.filtsda = CONFIG_LPI2C1_FILTSDA,
.scl_pin = PIN_LPI2C1_SCL,
.sda_pin = PIN_LPI2C1_SDA,
#ifndef CONFIG_I2C_SLAVE
.mode = LPI2C_MASTER,
#else
.mode = LPI2C_SLAVE,
#endif
#ifndef CONFIG_I2C_POLLED
.irq = S32K1XX_IRQ_LPI2C1M,
#endif
@@ -380,9 +361,9 @@ static struct s32k1xx_lpi2c_priv_s s32k1xx_lpi2c1_priv =
.ptr = NULL,
.dcnt = 0,
.flags = 0,
.status = 0
.status = 0,
};
#endif
#endif /* CONFIG_S32K1XX_LPI2C1 */
/****************************************************************************
* Private Functions
@@ -592,12 +573,14 @@ static inline int
s32k1xx_lpi2c_putreg(priv, S32K1XX_LPI2C_MIER_OFFSET, 0);
}
#if 0
/* Enable Interrupts when slave mode */
else
{
s32k1xx_lpi2c_putreg(priv, S32K1XX_LPI2C_SIER_OFFSET, 0);
}
#endif
leave_critical_section(flags);
return ret;
@@ -1199,7 +1182,7 @@ static int s32k1xx_lpi2c_isr_process(struct s32k1xx_lpi2c_priv_s *priv)
s32k1xx_lpi2c_tracenew(priv, status);
/* After an error we can get an SDF */
/* After an error we can get a STOP Detect Flag */
if (priv->intstate == INTSTATE_DONE && (status & LPI2C_MSR_SDF) != 0)
{
@@ -1238,7 +1221,7 @@ static int s32k1xx_lpi2c_isr_process(struct s32k1xx_lpi2c_priv_s *priv)
{
s32k1xx_lpi2c_traceevent(priv, I2CEVENT_RCVBYTE, priv->dcnt);
/* No interrupts or context switches should occur in the following
/* No interrupts or contex switches should occur in the following
* sequence. Otherwise, additional bytes may be sent by the device.
*/
@@ -1272,9 +1255,9 @@ static int s32k1xx_lpi2c_isr_process(struct s32k1xx_lpi2c_priv_s *priv)
{
if (priv->msgc > 0 && priv->msgv != NULL)
{
priv->ptr = priv->msgv->buffer;
priv->dcnt = priv->msgv->length;
priv->flags = priv->msgv->flags;
priv->ptr = priv->msgv->buffer;
priv->dcnt = priv->msgv->length;
priv->flags = priv->msgv->flags;
if ((priv->msgv->flags & I2C_M_NOSTART) == 0)
{
@@ -1431,9 +1414,9 @@ static int s32k1xx_lpi2c_isr(int irq, void *context, FAR void *arg)
static int s32k1xx_lpi2c_init(FAR struct s32k1xx_lpi2c_priv_s *priv)
{
/* Power-up and configure GPIOs .
/* Power-up and configure pins.
*
* NOTE: Clocking to the LPSPI peripheral must be provided by
* NOTE: Clocking to the LPI2C peripheral must be provided by
* board-specific logic as part of the clock configuration logic.
*/
@@ -1447,7 +1430,7 @@ static int s32k1xx_lpi2c_init(FAR struct s32k1xx_lpi2c_priv_s *priv)
s32k1xx_lpi2c_putreg(priv, S32K1XX_LPI2C_MCR_OFFSET, LPI2C_MCR_RST);
s32k1xx_lpi2c_putreg(priv, S32K1XX_LPI2C_MCR_OFFSET, 0);
/* Disable doze mode (Set DOZEN bit in 1 to disable) */
/* Disable doze mode (Set DOZEN bit to 1 to disable) */
s32k1xx_lpi2c_putreg(priv, S32K1XX_LPI2C_MCR_OFFSET, LPI2C_MCR_DOZEN);
@@ -1585,7 +1568,7 @@ static int s32k1xx_lpi2c_transfer(FAR struct i2c_master_s *dev,
priv->status = 0;
/* Wait for an ISR, if there was a timeout, fetch latest status to get
/* Wait for ISR. If there was a timeout, fetch latest status to get
* the BUSY flag.
*/
@@ -1820,7 +1803,7 @@ FAR struct i2c_master_s *s32k1xx_i2cbus_initialize(int port)
}
/* Initialize private data for the first time, increment reference count,
* power-up hardware and configure GPIOs.
* power-up hardware and configure pins.
*/
flags = enter_critical_section();
arch/arm/src/s32k1xx/s32k1xx_lpi2c_slave.c
+931
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File diff suppressed because it is too large Load Diff
arch/arm/src/s32k1xx/s32k1xx_lpi2c_slave.h
+90
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@@ -0,0 +1,90 @@
/****************************************************************************
* arch/arm/src/s32k1xx/s32k1xx_lpi2c_slave.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_S32K1XX_S32K1XX_LPI2C_SLAVE_H
#define __ARCH_ARM_SRC_S32K1XX_S32K1XX_LPI2C_SLAVE_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/i2c/i2c_slave.h>
/****************************************************************************
* Public Data
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: s32k1xx_i2cbus_slave_initialize
*
* Description:
* Initialize the I2C slave device and increase the reference counter.
* If the device has already been initialized only the reference counter
* will be increased.
*
* Input Parameters:
* port - Port number (for hardware that has multiple I2C interfaces).
*
* Returned Value:
* A valid I2C device structure reference on success; a NULL on failure.
*
****************************************************************************/
FAR struct i2c_slave_s *s32k1xx_i2cbus_slave_initialize(int port);
/****************************************************************************
* Name: s32k1xx_i2cbus_slave_uninitialize
*
* Description:
* Decrease the reference counter of the I2C slave device. When there are
* no more references left the I2C slave device is unitialized.
*
* Input Parameters:
* dev - Device structure as returned by s32k1xx_i2cbus_slave_initialize().
*
* Returned Value:
* OK on success, ERROR when there is an internal reference count mismatch
* or dev points to an invalid hardware device.
*
****************************************************************************/
int s32k1xx_i2cbus_slave_uninitialize(FAR struct i2c_slave_s *dev);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_S32K1XX_S32K1XX_LPI2C_SLAVE_H */