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Tiva I2C: Finishes initialization logic
This commit is contained in:
Gregory Nutt
parent
c16ab05135
commit
0daa071f2a
1 changed files with 198 additions and 134 deletions
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@ -4,6 +4,11 @@
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Derives in spirit if nothing more from the NuttX STM32 I2C driver which has:
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*
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* Copyright (C) 2011 Uros Platise. All rights reserved.
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* Author: Uros Platise <uros.platise@isotel.eu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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@ -166,7 +171,7 @@ struct tiva_trace_s
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{
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uint32_t status; /* I2C 32-bit SR2|SR1 status */
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uint32_t count; /* Interrupt count when status change */
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enum tiva_intstate_e event; /* Last event that occurred with this status */
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enum tiva_intstate_e event; /* Last event that occurred with this status */
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uint32_t parm; /* Parameter associated with the event */
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uint32_t time; /* First of event or first status */
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};
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@ -175,14 +180,17 @@ struct tiva_trace_s
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struct tiva_i2c_config_s
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{
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uintptr_t base; /* I2C base address */
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uintptr_t base; /* I2C base address */
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#ifndef TIVA_SYSCON_RCGCI2C
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uint32_t rcgbit; /* Bits in RCG1 register to enable clocking */
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#endif
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uint32_t scl_pin; /* GPIO configuration for SCL as SCL */
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uint32_t sda_pin; /* GPIO configuration for SDA as SDA */
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#ifndef CONFIG_I2C_POLLED
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int (*isr)(int, void *); /* Interrupt handler */
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uint8_t irq; /* IRQ number */
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#endif
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uint8_t devno; /* I2Cn where n = devno */
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};
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/* I2C Device Private Data */
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@ -221,7 +229,7 @@ struct tiva_i2c_priv_s
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struct tiva_i2c_inst_s
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{
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const struct i2c_ops_s *ops; /* Standard I2C operations */
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const struct i2c_ops_s *ops; /* Standard I2C operations */
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struct tiva_i2c_priv_s *priv; /* Common driver private data structure */
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uint32_t frequency; /* Frequency used in this instantiation */
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@ -233,39 +241,39 @@ struct tiva_i2c_inst_s
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* Private Function Prototypes
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************************************************************************************/
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static inline uint16_t tiva_i2c_getreg(FAR struct tiva_i2c_priv_s *priv,
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uint8_t offset);
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static inline void tiva_i2c_putreg(FAR struct tiva_i2c_priv_s *priv, uint8_t offset,
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uint16_t value);
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static inline void tiva_i2c_modifyreg(FAR struct tiva_i2c_priv_s *priv,
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static inline uint32_t tiva_i2c_getreg(struct tiva_i2c_priv_s *priv,
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unsigned int offset);
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static inline void tiva_i2c_putreg(struct tiva_i2c_priv_s *priv,
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unsigned int offset, uint32_t value);
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static inline void tiva_i2c_modifyreg(struct tiva_i2c_priv_s *priv,
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uint8_t offset, uint16_t clearbits,
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uint16_t setbits);
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static inline void tiva_i2c_sem_wait(FAR struct i2c_dev_s *dev);
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static inline void tiva_i2c_sem_wait(struct i2c_dev_s *dev);
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#ifdef CONFIG_TIVA_I2C_DYNTIMEO
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static useconds_t tiva_i2c_tousecs(int msgc, FAR struct i2c_msg_s *msgs);
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static useconds_t tiva_i2c_tousecs(int msgc, struct i2c_msg_s *msgs);
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#endif /* CONFIG_TIVA_I2C_DYNTIMEO */
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static inline int tiva_i2c_sem_waitdone(FAR struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sem_waitstop(FAR struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sem_post(FAR struct i2c_dev_s *dev);
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static inline void tiva_i2c_sem_init(FAR struct i2c_dev_s *dev);
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static inline void tiva_i2c_sem_destroy(FAR struct i2c_dev_s *dev);
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static inline int tiva_i2c_sem_waitdone(struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sem_waitstop(struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sem_post(struct i2c_dev_s *dev);
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static inline void tiva_i2c_sem_init(struct i2c_dev_s *dev);
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static inline void tiva_i2c_sem_destroy(struct i2c_dev_s *dev);
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#ifdef CONFIG_I2C_TRACE
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static void tiva_i2c_tracereset(FAR struct tiva_i2c_priv_s *priv);
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static void tiva_i2c_tracenew(FAR struct tiva_i2c_priv_s *priv, uint32_t status);
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static void tiva_i2c_traceevent(FAR struct tiva_i2c_priv_s *priv,
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static void tiva_i2c_tracereset(struct tiva_i2c_priv_s *priv);
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static void tiva_i2c_tracenew(struct tiva_i2c_priv_s *priv, uint32_t status);
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static void tiva_i2c_traceevent(struct tiva_i2c_priv_s *priv,
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enum tiva_trace_e event, uint32_t parm);
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static void tiva_i2c_tracedump(FAR struct tiva_i2c_priv_s *priv);
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static void tiva_i2c_tracedump(struct tiva_i2c_priv_s *priv);
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#endif /* CONFIG_I2C_TRACE */
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static void tiva_i2c_setclock(FAR struct tiva_i2c_priv_s *priv,
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static void tiva_i2c_setclock(struct tiva_i2c_priv_s *priv,
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uint32_t frequency);
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static inline void tiva_i2c_sendstart(FAR struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_clrstart(FAR struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sendstop(FAR struct tiva_i2c_priv_s *priv);
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static inline uint32_t tiva_i2c_getstatus(FAR struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sendstart(struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_clrstart(struct tiva_i2c_priv_s *priv);
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static inline void tiva_i2c_sendstop(struct tiva_i2c_priv_s *priv);
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static inline uint32_t tiva_i2c_getstatus(struct tiva_i2c_priv_s *priv);
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static int tiva_i2c_isr(struct tiva_i2c_priv_s * priv);
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@ -290,25 +298,25 @@ static int tiva_i2c5_isr(int irq, void *context);
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#endif
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#endif /* !CONFIG_I2C_POLLED */
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static int tiva_i2c_init(FAR struct tiva_i2c_priv_s *priv);
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static int tiva_i2c_deinit(FAR struct tiva_i2c_priv_s *priv);
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static uint32_t tiva_i2c_setfrequency(FAR struct i2c_dev_s *dev,
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static int tiva_i2c_initialize(struct tiva_i2c_priv_s *priv);
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static int tiva_i2c_uninitialize(struct tiva_i2c_priv_s *priv);
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static uint32_t tiva_i2c_setfrequency(struct i2c_dev_s *dev,
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uint32_t frequency);
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static int tiva_i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits);
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static int tiva_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
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static int tiva_i2c_setaddress(struct i2c_dev_s *dev, int addr, int nbits);
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static int tiva_i2c_process(struct i2c_dev_s *dev, struct i2c_msg_s *msgs,
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int count);
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static int tiva_i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer,
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static int tiva_i2c_write(struct i2c_dev_s *dev, const uint8_t *buffer,
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int buflen);
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static int tiva_i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen);
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static int tiva_i2c_read(struct i2c_dev_s *dev, uint8_t *buffer, int buflen);
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#ifdef CONFIG_I2C_WRITEREAD
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static int tiva_i2c_writeread(FAR struct i2c_dev_s *dev,
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static int tiva_i2c_writeread(struct i2c_dev_s *dev,
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const uint8_t *wbuffer, int wbuflen,
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uint8_t *buffer, int buflen);
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#endif /* CONFIG_I2C_WRITEREAD */
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#ifdef CONFIG_I2C_TRANSFER
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static int tiva_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
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static int tiva_i2c_transfer(struct i2c_dev_s *dev, struct i2c_msg_s *msgs,
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int count);
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#endif /* CONFIG_I2C_TRANSFER */
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@ -320,9 +328,7 @@ static int tiva_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *ms
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static const struct tiva_i2c_config_s tiva_i2c0_config =
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{
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.base = TIVA_I2C0_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R0,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C0,
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#endif
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.scl_pin = GPIO_I2C0_SCL,
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@ -331,6 +337,7 @@ static const struct tiva_i2c_config_s tiva_i2c0_config =
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.isr = tiva_i2c0_isr,
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.irq = TIVA_IRQ_I2C0,
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#endif
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.devno = 0,
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};
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static struct tiva_i2c_priv_s tiva_i2c0_priv =
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@ -351,9 +358,7 @@ static struct tiva_i2c_priv_s tiva_i2c0_priv =
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static const struct tiva_i2c_config_s tiva_i2c1_config =
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{
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.base = TIVA_I2C1_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R1,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C1,
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#endif
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.scl_pin = GPIO_I2C1_SCL,
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@ -362,6 +367,7 @@ static const struct tiva_i2c_config_s tiva_i2c1_config =
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.isr = tiva_i2c1_isr,
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.irq = TIVA_IRQ_I2C1,
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#endif
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.devno = 1,
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};
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static struct tiva_i2c_priv_s tiva_i2c1_priv =
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@ -382,9 +388,7 @@ static struct tiva_i2c_priv_s tiva_i2c1_priv =
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static const struct tiva_i2c_config_s tiva_i2c2_config =
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{
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.base = TIVA_I2C2_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R2,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C2,
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#endif
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.scl_pin = GPIO_I2C2_SCL,
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@ -393,6 +397,7 @@ static const struct tiva_i2c_config_s tiva_i2c2_config =
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.isr = tiva_i2c2_isr,
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.irq = TIVA_IRQ_I2C2,
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#endif
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.devno = 2,
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};
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static struct tiva_i2c_priv_s tiva_i2c2_priv =
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@ -413,9 +418,7 @@ static struct tiva_i2c_priv_s tiva_i2c2_priv =
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static const struct tiva_i2c_config_s tiva_i2c3_config =
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{
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.base = TIVA_I2C3_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R3,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C3,
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#endif
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.scl_pin = GPIO_I2C3_SCL,
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@ -424,6 +427,7 @@ static const struct tiva_i2c_config_s tiva_i2c3_config =
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.isr = tiva_i2c3_isr,
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.irq = TIVA_IRQ_I2C3,
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#endif
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.devno = 3,
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};
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static struct tiva_i2c_priv_s tiva_i2c3_priv =
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@ -444,9 +448,7 @@ static struct tiva_i2c_priv_s tiva_i2c3_priv =
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static const struct tiva_i2c_config_s tiva_i2c4_config =
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{
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.base = TIVA_I2C4_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R4,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C4,
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#endif
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.scl_pin = GPIO_I2C4_SCL,
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@ -455,6 +457,7 @@ static const struct tiva_i2c_config_s tiva_i2c4_config =
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.isr = tiva_i2c4_isr,
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.irq = TIVA_IRQ_I2C4,
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#endif
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.devno = 4,
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};
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static struct tiva_i2c_priv_s tiva_i2c4_priv =
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@ -475,9 +478,7 @@ static struct tiva_i2c_priv_s tiva_i2c4_priv =
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static const struct tiva_i2c_config_s tiva_i2c5_config =
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{
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.base = TIVA_I2C5_BASE,
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#ifdef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGCI2C_R5,
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#else
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#ifndef TIVA_SYSCON_RCGCI2C
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.rcgbit = SYSCON_RCGC1_I2C5,
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#endif
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.scl_pin = GPIO_I2C5_SCL,
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@ -486,6 +487,7 @@ static const struct tiva_i2c_config_s tiva_i2c5_config =
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.isr = tiva_i2c5_isr,
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.irq = TIVA_IRQ_I2C5,
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#endif
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.devno = 5,
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};
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static struct tiva_i2c_priv_s tiva_i2c5_priv =
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@ -534,7 +536,7 @@ static const struct i2c_ops_s tiva_i2c_ops =
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*
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************************************************************************************/
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static inline uint16_t tiva_i2c_getreg(FAR struct tiva_i2c_priv_s *priv,
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static inline uint16_t tiva_i2c_getreg(struct tiva_i2c_priv_s *priv,
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unsigned int offset)
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{
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return getreg32(priv->config->base + offset);
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@ -548,7 +550,7 @@ static inline uint16_t tiva_i2c_getreg(FAR struct tiva_i2c_priv_s *priv,
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*
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************************************************************************************/
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static inline void tiva_i2c_putreg(FAR struct tiva_i2c_priv_s *priv,
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static inline void tiva_i2c_putreg(struct tiva_i2c_priv_s *priv,
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unsigned int offset, uint32_t regval)
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{
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putreg32(regval, priv->config->base + offset);
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@ -562,9 +564,9 @@ static inline void tiva_i2c_putreg(FAR struct tiva_i2c_priv_s *priv,
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*
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************************************************************************************/
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static inline void tiva_i2c_modifyreg(FAR struct tiva_i2c_priv_s *priv,
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uint8_t offset, uint16_t clearbits,
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uint16_t setbits)
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static inline void tiva_i2c_modifyreg(struct tiva_i2c_priv_s *priv,
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uint8_t offset, uint16_t clearbits,
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uint16_t setbits)
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{
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modifyreg16(priv->config->base + offset, clearbits, setbits);
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}
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@ -577,9 +579,11 @@ static inline void tiva_i2c_modifyreg(FAR struct tiva_i2c_priv_s *priv,
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*
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************************************************************************************/
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static inline void tiva_i2c_sem_wait(FAR struct i2c_dev_s *dev)
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static inline void tiva_i2c_sem_wait(struct i2c_dev_s *dev)
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{
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while (sem_wait(&((struct tiva_i2c_inst_s *)dev)->priv->sem_excl) != 0)
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struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
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while (sem_wait(&inst->priv->sem_excl) != 0)
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{
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ASSERT(errno == EINTR);
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}
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@ -594,7 +598,7 @@ static inline void tiva_i2c_sem_wait(FAR struct i2c_dev_s *dev)
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************************************************************************************/
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#ifdef CONFIG_TIVA_I2C_DYNTIMEO
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static useconds_t tiva_i2c_tousecs(int msgc, FAR struct i2c_msg_s *msgs)
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static useconds_t tiva_i2c_tousecs(int msgc, struct i2c_msg_s *msgs)
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{
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size_t bytecount = 0;
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int i;
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@ -623,7 +627,7 @@ static useconds_t tiva_i2c_tousecs(int msgc, FAR struct i2c_msg_s *msgs)
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************************************************************************************/
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#ifndef CONFIG_I2C_POLLED
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static inline int tiva_i2c_sem_waitdone(FAR struct tiva_i2c_priv_s *priv)
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static inline int tiva_i2c_sem_waitdone(struct tiva_i2c_priv_s *priv)
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{
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struct timespec abstime;
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irqstate_t flags;
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@ -701,7 +705,7 @@ static inline int tiva_i2c_sem_waitdone(FAR struct tiva_i2c_priv_s *priv)
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return ret;
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}
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#else
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static inline int tiva_i2c_sem_waitdone(FAR struct tiva_i2c_priv_s *priv)
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static inline int tiva_i2c_sem_waitdone(struct tiva_i2c_priv_s *priv)
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{
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uint32_t timeout;
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uint32_t start;
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|
|
@ -760,7 +764,7 @@ static inline int tiva_i2c_sem_waitdone(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sem_waitstop(FAR struct tiva_i2c_priv_s *priv)
|
||||
static inline void tiva_i2c_sem_waitstop(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
uint32_t start;
|
||||
uint32_t elapsed;
|
||||
|
|
@ -816,9 +820,11 @@ static inline void tiva_i2c_sem_waitstop(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sem_post(FAR struct i2c_dev_s *dev)
|
||||
static inline void tiva_i2c_sem_post(struct i2c_dev_s *dev)
|
||||
{
|
||||
sem_post(&((struct tiva_i2c_inst_s *)dev)->priv->sem_excl);
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
|
||||
sem_post(&inst->priv->sem_excl);
|
||||
}
|
||||
|
||||
/************************************************************************************
|
||||
|
|
@ -829,11 +835,13 @@ static inline void tiva_i2c_sem_post(FAR struct i2c_dev_s *dev)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sem_init(FAR struct i2c_dev_s *dev)
|
||||
static inline void tiva_i2c_sem_init(struct i2c_dev_s *dev)
|
||||
{
|
||||
sem_init(&((struct tiva_i2c_inst_s *)dev)->priv->sem_excl, 0, 1);
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
|
||||
sem_init(&inst->priv->sem_excl, 0, 1);
|
||||
#ifndef CONFIG_I2C_POLLED
|
||||
sem_init(&((struct tiva_i2c_inst_s *)dev)->priv->sem_isr, 0, 0);
|
||||
sem_init(&inst->priv->sem_isr, 0, 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
@ -845,11 +853,13 @@ static inline void tiva_i2c_sem_init(FAR struct i2c_dev_s *dev)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sem_destroy(FAR struct i2c_dev_s *dev)
|
||||
static inline void tiva_i2c_sem_destroy(struct i2c_dev_s *dev)
|
||||
{
|
||||
sem_destroy(&((struct tiva_i2c_inst_s *)dev)->priv->sem_excl);
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
|
||||
sem_destroy(&inst->priv->sem_excl);
|
||||
#ifndef CONFIG_I2C_POLLED
|
||||
sem_destroy(&((struct tiva_i2c_inst_s *)dev)->priv->sem_isr);
|
||||
sem_destroy(&inst->priv->sem_isr);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
@ -862,7 +872,7 @@ static inline void tiva_i2c_sem_destroy(FAR struct i2c_dev_s *dev)
|
|||
************************************************************************************/
|
||||
|
||||
#ifdef CONFIG_I2C_TRACE
|
||||
static void tiva_i2c_traceclear(FAR struct tiva_i2c_priv_s *priv)
|
||||
static void tiva_i2c_traceclear(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
struct tiva_trace_s *trace = &priv->trace[priv->tndx];
|
||||
|
||||
|
|
@ -873,7 +883,7 @@ static void tiva_i2c_traceclear(FAR struct tiva_i2c_priv_s *priv)
|
|||
trace->time = 0; /* Time of first status or event */
|
||||
}
|
||||
|
||||
static void tiva_i2c_tracereset(FAR struct tiva_i2c_priv_s *priv)
|
||||
static void tiva_i2c_tracereset(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
/* Reset the trace info for a new data collection */
|
||||
|
||||
|
|
@ -882,7 +892,7 @@ static void tiva_i2c_tracereset(FAR struct tiva_i2c_priv_s *priv)
|
|||
tiva_i2c_traceclear(priv);
|
||||
}
|
||||
|
||||
static void tiva_i2c_tracenew(FAR struct tiva_i2c_priv_s *priv, uint32_t status)
|
||||
static void tiva_i2c_tracenew(struct tiva_i2c_priv_s *priv, uint32_t status)
|
||||
{
|
||||
struct tiva_trace_s *trace = &priv->trace[priv->tndx];
|
||||
|
||||
|
|
@ -921,7 +931,7 @@ static void tiva_i2c_tracenew(FAR struct tiva_i2c_priv_s *priv, uint32_t status)
|
|||
}
|
||||
}
|
||||
|
||||
static void tiva_i2c_traceevent(FAR struct tiva_i2c_priv_s *priv,
|
||||
static void tiva_i2c_traceevent(struct tiva_i2c_priv_s *priv,
|
||||
enum tiva_trace_e event, uint32_t parm)
|
||||
{
|
||||
struct tiva_trace_s *trace;
|
||||
|
|
@ -948,7 +958,7 @@ static void tiva_i2c_traceevent(FAR struct tiva_i2c_priv_s *priv,
|
|||
}
|
||||
}
|
||||
|
||||
static void tiva_i2c_tracedump(FAR struct tiva_i2c_priv_s *priv)
|
||||
static void tiva_i2c_tracedump(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
struct tiva_trace_s *trace;
|
||||
int i;
|
||||
|
|
@ -975,7 +985,7 @@ static void tiva_i2c_tracedump(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static void tiva_i2c_setclock(FAR struct tiva_i2c_priv_s *priv, uint32_t frequency)
|
||||
static void tiva_i2c_setclock(struct tiva_i2c_priv_s *priv, uint32_t frequency)
|
||||
{
|
||||
uint16_t cr1;
|
||||
uint16_t ccr;
|
||||
|
|
@ -1004,7 +1014,7 @@ static void tiva_i2c_setclock(FAR struct tiva_i2c_priv_s *priv, uint32_t frequen
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sendstart(FAR struct tiva_i2c_priv_s *priv)
|
||||
static inline void tiva_i2c_sendstart(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
/* Disable ACK on receive by default and generate START */
|
||||
#warning Missing logic
|
||||
|
|
@ -1018,7 +1028,7 @@ static inline void tiva_i2c_sendstart(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_clrstart(FAR struct tiva_i2c_priv_s *priv)
|
||||
static inline void tiva_i2c_clrstart(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
#warning Missing logic
|
||||
}
|
||||
|
|
@ -1031,7 +1041,7 @@ static inline void tiva_i2c_clrstart(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline void tiva_i2c_sendstop(FAR struct tiva_i2c_priv_s *priv)
|
||||
static inline void tiva_i2c_sendstop(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
#warning Missing logic
|
||||
}
|
||||
|
|
@ -1044,7 +1054,7 @@ static inline void tiva_i2c_sendstop(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static inline uint32_t tiva_i2c_getstatus(FAR struct tiva_i2c_priv_s *priv)
|
||||
static inline uint32_t tiva_i2c_getstatus(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
#warning Missing logic
|
||||
}
|
||||
|
|
@ -1085,7 +1095,9 @@ static int tiva_i2c_isr(struct tiva_i2c_priv_s *priv)
|
|||
priv->flags = priv->msgv->flags;
|
||||
|
||||
/* Send address byte and define addressing mode */
|
||||
#warning Missing logic
|
||||
|
||||
tiva_i2c_putreg(priv, TIVA_I2CM_SA_OFFSET,
|
||||
(priv->msgv->addr << 1) | (priv->flags & I2C_M_READ));
|
||||
|
||||
/* Set ACK for receive mode */
|
||||
#warning Missing logic
|
||||
|
|
@ -1376,40 +1388,39 @@ static int tiva_i2c5_isr(int irq, void *context)
|
|||
#endif
|
||||
|
||||
/************************************************************************************
|
||||
* Private Initialization and Un-initialization
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Name: tiva_i2c_init
|
||||
* Name: tiva_i2c_initialize
|
||||
*
|
||||
* Description:
|
||||
* Setup the I2C hardware, ready for operation with defaults
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
static int tiva_i2c_init(FAR struct tiva_i2c_priv_s *priv)
|
||||
static int tiva_i2c_initialize(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
uint32_t regval;
|
||||
int ret;
|
||||
|
||||
/* Enable clocking to the I2C peripheral */
|
||||
|
||||
#ifdef TIVA_SYSCON_RCGCI2C
|
||||
up_modifyreg32(TIVA_SYSCON_RCGCI2C, 0, priv->rcgbit);
|
||||
up_modifyreg32(TIVA_SYSCON_RCGCI2C, 0, SYSCON_RCGCI2C(priv->devno));
|
||||
#else
|
||||
up_modifyreg32(TIVA_SYSCON_RCGC1, 0, priv->rcgbit);
|
||||
#endif
|
||||
|
||||
/* Configure pins */
|
||||
|
||||
if (tiva_configgpio(priv->config->scl_pin) < 0)
|
||||
ret = tiva_configgpio(priv->config->scl_pin)
|
||||
if (ret < 0)
|
||||
{
|
||||
return ERROR;
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (tiva_configgpio(priv->config->sda_pin) < 0)
|
||||
ret = tiva_configgpio(priv->config->sda_pin)
|
||||
if (ret < 0)
|
||||
{
|
||||
tiva_unconfiggpio(priv->config->scl_pin);
|
||||
return ERROR;
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Enable the I2C master block */
|
||||
|
|
@ -1419,12 +1430,11 @@ static int tiva_i2c_init(FAR struct tiva_i2c_priv_s *priv)
|
|||
tiva_i2c_putreg(priv, TIVA_I2CM_CR_OFFSET, regval);
|
||||
|
||||
/* Configure the the initial I2C clock frequency. */
|
||||
#warning Missing logic
|
||||
|
||||
tiva_i2c_setclock(priv, 100000);
|
||||
|
||||
/* Attach interrupt handlers and enable interrupts at the NVIC (still
|
||||
* disabled at the source)
|
||||
* disabled at the source).
|
||||
*/
|
||||
|
||||
#ifndef CONFIG_I2C_POLLED
|
||||
|
|
@ -1435,18 +1445,22 @@ static int tiva_i2c_init(FAR struct tiva_i2c_priv_s *priv)
|
|||
}
|
||||
|
||||
/************************************************************************************
|
||||
* Name: tiva_i2c_deinit
|
||||
* Name: tiva_i2c_uninitialize
|
||||
*
|
||||
* Description:
|
||||
* Shutdown the I2C hardware
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
static int tiva_i2c_deinit(FAR struct tiva_i2c_priv_s *priv)
|
||||
static int tiva_i2c_uninitialize(struct tiva_i2c_priv_s *priv)
|
||||
{
|
||||
/* Disable I2C */
|
||||
#warning Missing logic
|
||||
uint32_t regval;
|
||||
|
||||
/* Disable I2C */
|
||||
|
||||
regval = tiva_i2c_getreg(priv, TIVA_I2CM_CR_OFFSET);
|
||||
regval &= ~I2CM_CR_MFE;
|
||||
tiva_i2c_putreg(priv, TIVA_I2CM_CR_OFFSET, regval);
|
||||
|
||||
/* Unconfigure GPIO pins */
|
||||
|
||||
|
|
@ -1461,7 +1475,12 @@ static int tiva_i2c_deinit(FAR struct tiva_i2c_priv_s *priv)
|
|||
#endif
|
||||
|
||||
/* Disable clocking */
|
||||
#warning Missing logic
|
||||
|
||||
#ifdef TIVA_SYSCON_RCGCI2C
|
||||
up_modifyreg32(TIVA_SYSCON_RCGCI2C, SYSCON_RCGCI2C(priv->devno), 0);
|
||||
#else
|
||||
up_modifyreg32(TIVA_SYSCON_RCGC1, priv->rcgbit, 0);
|
||||
#endif
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
|
@ -1478,14 +1497,51 @@ static int tiva_i2c_deinit(FAR struct tiva_i2c_priv_s *priv)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static uint32_t tiva_i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t frequency)
|
||||
static uint32_t tiva_i2c_setfrequency(struct i2c_dev_s *dev, uint32_t frequency)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
struct tiva_i2c_priv_s *priv;
|
||||
uint32_t regval;
|
||||
uint32_t tmp;
|
||||
|
||||
DEBUGASSERT(inst && inst->priv);
|
||||
priv = inst->priv;
|
||||
|
||||
/* Get exclusive access to the I2C device */
|
||||
|
||||
tiva_i2c_sem_wait(dev);
|
||||
|
||||
((struct tiva_i2c_inst_s *)dev)->frequency = frequency;
|
||||
/* Calculate the clock divider that results in the highest frequency that
|
||||
* is than or equal to the desired speed.
|
||||
*/
|
||||
|
||||
tmp = 2 * 10 * frequency;
|
||||
regval = (((SYSCLK_FREQUENCY + tmp - 1) / tmp) - 1) << I2CM_TPR_SHIFT;
|
||||
|
||||
DEBUGASSERT((regval & I2CM_TPR_MASK) == 0);
|
||||
tiva_i2c_putreg(priv, TIVA_I2CM_TPR_OFFSET, regval);
|
||||
|
||||
#ifdef TIVA_I2CSC_PP_OFFSET
|
||||
/* If the I2C peripheral is High-Speed enabled then choose the highest
|
||||
* speed that is less than or equal to 3.4 Mbps.
|
||||
*/
|
||||
|
||||
regval = tiva_i2c_putreg(priv, TIVA_I2CSC_PP_OFFSET);
|
||||
if ((regval & I2CSC_PP_HS) != 0)
|
||||
{
|
||||
regval = ((SYSCLK_FREQUENCY +
|
||||
(2 * 3 * 3400000) - 1) / (2 * 3 * 3400000)) - 1;
|
||||
|
||||
tiva_i2c_putreg(priv, TIVA_I2CM_TPR_OFFSET, I2CM_TPR_HS | regval);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Remember the frequency setting */
|
||||
|
||||
intst->frequency = frequency;
|
||||
|
||||
tiva_i2c_sem_post(dev);
|
||||
return ((struct tiva_i2c_inst_s *)dev)->frequency;
|
||||
return frequency;
|
||||
}
|
||||
|
||||
/************************************************************************************
|
||||
|
|
@ -1496,12 +1552,13 @@ static uint32_t tiva_i2c_setfrequency(FAR struct i2c_dev_s *dev, uint32_t freque
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static int tiva_i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits)
|
||||
static int tiva_i2c_setaddress(struct i2c_dev_s *dev, int addr, int nbits)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
tiva_i2c_sem_wait(dev);
|
||||
|
||||
((struct tiva_i2c_inst_s *)dev)->address = addr;
|
||||
((struct tiva_i2c_inst_s *)dev)->flags = (nbits == 10) ? I2C_M_TEN : 0;
|
||||
inst->address = addr;
|
||||
inst->flags = (nbits == 10) ? I2C_M_TEN : 0;
|
||||
|
||||
tiva_i2c_sem_post(dev);
|
||||
return OK;
|
||||
|
|
@ -1515,11 +1572,11 @@ static int tiva_i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static int tiva_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
|
||||
static int tiva_i2c_process(struct i2c_dev_s *dev, struct i2c_msg_s *msgs,
|
||||
int count)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
FAR struct tiva_i2c_priv_s *priv = inst->priv;
|
||||
struct tiva_i2c_priv_s *priv = inst->priv;
|
||||
uint32_t status = 0;
|
||||
int errval = 0;
|
||||
|
||||
|
|
@ -1691,14 +1748,16 @@ static int tiva_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msg
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
static int tiva_i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int buflen)
|
||||
static int tiva_i2c_write(struct i2c_dev_s *dev, const uint8_t *buffer, int buflen)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
|
||||
tiva_i2c_sem_wait(dev); /* ensure that address or flags don't change meanwhile */
|
||||
|
||||
struct i2c_msg_s msgv =
|
||||
{
|
||||
.addr = ((struct tiva_i2c_inst_s *)dev)->address,
|
||||
.flags = ((struct tiva_i2c_inst_s *)dev)->flags,
|
||||
.addr = inst->address,
|
||||
.flags = inst->flags,
|
||||
.buffer = (uint8_t *)buffer,
|
||||
.length = buflen
|
||||
};
|
||||
|
|
@ -1714,14 +1773,16 @@ static int tiva_i2c_write(FAR struct i2c_dev_s *dev, const uint8_t *buffer, int
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
int tiva_i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen)
|
||||
int tiva_i2c_read(struct i2c_dev_s *dev, uint8_t *buffer, int buflen)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
|
||||
tiva_i2c_sem_wait(dev); /* ensure that address or flags don't change meanwhile */
|
||||
|
||||
struct i2c_msg_s msgv =
|
||||
{
|
||||
.addr = ((struct tiva_i2c_inst_s *)dev)->address,
|
||||
.flags = ((struct tiva_i2c_inst_s *)dev)->flags | I2C_M_READ,
|
||||
.addr = inst->address,
|
||||
.flags = inst->flags | I2C_M_READ,
|
||||
.buffer = buffer,
|
||||
.length = buflen
|
||||
};
|
||||
|
|
@ -1738,23 +1799,24 @@ int tiva_i2c_read(FAR struct i2c_dev_s *dev, uint8_t *buffer, int buflen)
|
|||
************************************************************************************/
|
||||
|
||||
#ifdef CONFIG_I2C_WRITEREAD
|
||||
static int tiva_i2c_writeread(FAR struct i2c_dev_s *dev,
|
||||
const uint8_t *wbuffer, int wbuflen,
|
||||
uint8_t *buffer, int buflen)
|
||||
static int tiva_i2c_writeread(struct i2c_dev_s *dev,
|
||||
const uint8_t *wbuffer, int wbuflen,
|
||||
uint8_t *buffer, int buflen)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
tiva_i2c_sem_wait(dev); /* Ensure that address or flags don't change meanwhile */
|
||||
|
||||
struct i2c_msg_s msgv[2] =
|
||||
{
|
||||
{
|
||||
.addr = ((struct tiva_i2c_inst_s *)dev)->address,
|
||||
.flags = ((struct tiva_i2c_inst_s *)dev)->flags,
|
||||
.addr = inst->address,
|
||||
.flags = inst->flags,
|
||||
.buffer = (uint8_t *)wbuffer, /* This is really ugly, sorry const ... */
|
||||
.length = wbuflen
|
||||
},
|
||||
{
|
||||
.addr = ((struct tiva_i2c_inst_s *)dev)->address,
|
||||
.flags = ((struct tiva_i2c_inst_s *)dev)->flags | ((buflen>0) ? I2C_M_READ : I2C_M_NORESTART),
|
||||
.addr = inst->address,
|
||||
.flags = inst->flags | ((buflen>0) ? I2C_M_READ : I2C_M_NORESTART),
|
||||
.buffer = buffer,
|
||||
.length = (buflen>0) ? buflen : -buflen
|
||||
}
|
||||
|
|
@ -1773,8 +1835,8 @@ static int tiva_i2c_writeread(FAR struct i2c_dev_s *dev,
|
|||
************************************************************************************/
|
||||
|
||||
#ifdef CONFIG_I2C_TRANSFER
|
||||
static int tiva_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
|
||||
int count)
|
||||
static int tiva_i2c_transfer(struct i2c_dev_s *dev, struct i2c_msg_s *msgs,
|
||||
int count)
|
||||
{
|
||||
tiva_i2c_sem_wait(dev); /* Ensure that address or flags don't change meanwhile */
|
||||
return tiva_i2c_process(dev, msgs, count);
|
||||
|
|
@ -1793,7 +1855,7 @@ static int tiva_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *ms
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
FAR struct i2c_dev_s *up_i2cinitialize(int port)
|
||||
struct i2c_dev_s *up_i2cinitialize(int port)
|
||||
{
|
||||
struct tiva_i2c_priv_s * priv = NULL; /* Private data of device with multiple instances */
|
||||
struct tiva_i2c_inst_s * inst = NULL; /* Device, single instance */
|
||||
|
|
@ -1861,7 +1923,7 @@ FAR struct i2c_dev_s *up_i2cinitialize(int port)
|
|||
if ((volatile int)priv->refs++ == 0)
|
||||
{
|
||||
tiva_i2c_sem_init((struct i2c_dev_s *)inst);
|
||||
tiva_i2c_init(priv);
|
||||
tiva_i2c_initialize(priv);
|
||||
}
|
||||
|
||||
irqrestore(irqs);
|
||||
|
|
@ -1876,22 +1938,23 @@ FAR struct i2c_dev_s *up_i2cinitialize(int port)
|
|||
*
|
||||
************************************************************************************/
|
||||
|
||||
int up_i2cuninitialize(FAR struct i2c_dev_s * dev)
|
||||
int up_i2cuninitialize(struct i2c_dev_s *dev)
|
||||
{
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
int irqs;
|
||||
|
||||
ASSERT(dev);
|
||||
|
||||
/* Decrement reference count and check for underflow */
|
||||
|
||||
if (((struct tiva_i2c_inst_s *)dev)->priv->refs == 0)
|
||||
if (inst->priv->refs == 0)
|
||||
{
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
irqs = irqsave();
|
||||
|
||||
if (--((struct tiva_i2c_inst_s *)dev)->priv->refs)
|
||||
if (--inst->priv->refs)
|
||||
{
|
||||
irqrestore(irqs);
|
||||
kmm_free(dev);
|
||||
|
|
@ -1902,7 +1965,7 @@ int up_i2cuninitialize(FAR struct i2c_dev_s * dev)
|
|||
|
||||
/* Disable power and other HW resource (GPIO's) */
|
||||
|
||||
tiva_i2c_deinit(((struct tiva_i2c_inst_s *)dev)->priv);
|
||||
tiva_i2c_uninitialize(inst->priv);
|
||||
|
||||
/* Release unused resources */
|
||||
|
||||
|
|
@ -1921,9 +1984,10 @@ int up_i2cuninitialize(FAR struct i2c_dev_s * dev)
|
|||
************************************************************************************/
|
||||
|
||||
#ifdef CONFIG_I2C_RESET
|
||||
int up_i2creset(FAR struct i2c_dev_s * dev)
|
||||
int up_i2creset(struct i2c_dev_s *dev)
|
||||
{
|
||||
struct tiva_i2c_priv_s * priv;
|
||||
struct tiva_i2c_inst_s *inst = (struct tiva_i2c_inst_s *)dev;
|
||||
struct tiva_i2c_priv_s *priv;
|
||||
unsigned int clock_count;
|
||||
unsigned int stretch_count;
|
||||
uint32_t scl_gpio;
|
||||
|
|
@ -1934,7 +1998,7 @@ int up_i2creset(FAR struct i2c_dev_s * dev)
|
|||
|
||||
/* Get I2C private structure */
|
||||
|
||||
priv = ((struct tiva_i2c_inst_s *)dev)->priv;
|
||||
priv = inst->priv;
|
||||
|
||||
/* Our caller must own a ref */
|
||||
|
||||
|
|
@ -1944,9 +2008,9 @@ int up_i2creset(FAR struct i2c_dev_s * dev)
|
|||
|
||||
tiva_i2c_sem_wait(dev);
|
||||
|
||||
/* De-init the port */
|
||||
/* Un-initialize the port */
|
||||
|
||||
tiva_i2c_deinit(priv);
|
||||
tiva_i2c_uninitialize(priv);
|
||||
|
||||
/* Use GPIO configuration to un-wedge the bus */
|
||||
|
||||
|
|
@ -2021,7 +2085,7 @@ int up_i2creset(FAR struct i2c_dev_s * dev)
|
|||
|
||||
/* Re-init the port */
|
||||
|
||||
tiva_i2c_init(priv);
|
||||
tiva_i2c_initialize(priv);
|
||||
ret = OK;
|
||||
|
||||
out:
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue