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Diffstat (limited to 'c/src/lib/libbsp/arm/beagle/include/i2c.h')
| -rw-r--r-- | c/src/lib/libbsp/arm/beagle/include/i2c.h | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/c/src/lib/libbsp/arm/beagle/include/i2c.h b/c/src/lib/libbsp/arm/beagle/include/i2c.h deleted file mode 100644 index e7d17163f4..0000000000 --- a/c/src/lib/libbsp/arm/beagle/include/i2c.h +++ /dev/null @@ -1,368 +0,0 @@ -/** - * @file - * - * @ingroup arm_beagle - * - * @brief I2C support API. - */ - -/* - * Copyright (c) 2012 Claas Ziemke. All rights reserved. - * - * Claas Ziemke - * Kernerstrasse 11 - * 70182 Stuttgart - * Germany - * <claas.ziemke@gmx.net> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#ifndef LIBBSP_ARM_BEAGLE_I2C_H -#define LIBBSP_ARM_BEAGLE_I2C_H - -#include <rtems.h> - -#include <bsp.h> - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - - -/* I2C Configuration Register (I2C_CON): */ - -#define I2C_CON_EN (1 << 15) /* I2C module enable */ -#define I2C_CON_BE (1 << 14) /* Big endian mode */ -#define I2C_CON_STB (1 << 11) /* Start byte mode (master mode only) */ -#define I2C_CON_MST (1 << 10) /* Master/slave mode */ -#define I2C_CON_TRX (1 << 9) /* Transmitter/receiver mode */ - /* (master mode only) */ -#define I2C_CON_XA (1 << 8) /* Expand address */ -#define I2C_CON_STP (1 << 1) /* Stop condition (master mode only) */ -#define I2C_CON_STT (1 << 0) /* Start condition (master mode only) */ - -/* I2C Status Register (I2C_STAT): */ - -#define I2C_STAT_SBD (1 << 15) /* Single byte data */ -#define I2C_STAT_BB (1 << 12) /* Bus busy */ -#define I2C_STAT_ROVR (1 << 11) /* Receive overrun */ -#define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */ -#define I2C_STAT_AAS (1 << 9) /* Address as slave */ -#define I2C_STAT_GC (1 << 5) -#define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */ -#define I2C_STAT_RRDY (1 << 3) /* Receive data ready */ -#define I2C_STAT_ARDY (1 << 2) /* Register access ready */ -#define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */ -#define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */ - -/* I2C Interrupt Enable Register (I2C_IE): */ -#define I2C_IE_GC_IE (1 << 5) -#define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */ -#define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */ -#define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */ -#define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */ -#define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */ -/* - * The equation for the low and high time is - * tlow = scll + scll_trim = (sampling clock * tlow_duty) / speed - * thigh = sclh + sclh_trim = (sampling clock * (1 - tlow_duty)) / speed - * - * If the duty cycle is 50% - * - * tlow = scll + scll_trim = sampling clock / (2 * speed) - * thigh = sclh + sclh_trim = sampling clock / (2 * speed) - * - * In TRM - * scll_trim = 7 - * sclh_trim = 5 - * - * The linux 2.6.30 kernel uses - * scll_trim = 6 - * sclh_trim = 6 - * - * These are the trim values for standard and fast speed - */ -#ifndef I2C_FASTSPEED_SCLL_TRIM -#define I2C_FASTSPEED_SCLL_TRIM 6 -#endif -#ifndef I2C_FASTSPEED_SCLH_TRIM -#define I2C_FASTSPEED_SCLH_TRIM 6 -#endif - -/* These are the trim values for high speed */ -#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM -#define I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM -#endif -#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM -#define I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM -#endif -#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM -#define I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM -#endif -#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM -#define I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM -#endif - -#define OMAP_I2C_STANDARD 100000 -#define OMAP_I2C_FAST_MODE 400000 -#define OMAP_I2C_HIGH_SPEED 3400000 - - -/* Use the reference value of 96MHz if not explicitly set by the board */ -#ifndef I2C_IP_CLK -#define I2C_IP_CLK SYSTEM_CLOCK_96 -#endif - -/* - * The reference minimum clock for high speed is 19.2MHz. - * The linux 2.6.30 kernel uses this value. - * The reference minimum clock for fast mode is 9.6MHz - * The reference minimum clock for standard mode is 4MHz - * In TRM, the value of 12MHz is used. - */ -#ifndef I2C_INTERNAL_SAMPLING_CLK -#define I2C_INTERNAL_SAMPLING_CLK 19200000 -#endif - -#define I2C_PSC_MAX 0x0f -#define I2C_PSC_MIN 0x00 - - -#define DISP_LINE_LEN 128 -#define I2C_TIMEOUT 1000 - -#define I2C_BUS_MAX 3 - -#define I2C_BASE1 (OMAP34XX_CORE_L4_IO_BASE + 0x070000) - -#define I2C_DEFAULT_BASE I2C_BASE1 - -#define I2C_SYSS_RDONE (1 << 0) /* Internel reset monitoring */ - -#define CONFIG_SYS_I2C_SPEED 100000 -#define CONFIG_SYS_I2C_SLAVE 1 - -struct i2c { - unsigned short rev; /* 0x00 */ - unsigned short res1; - unsigned short ie; /* 0x04 */ - unsigned short res2; - unsigned short stat; /* 0x08 */ - unsigned short res3; - unsigned short iv; /* 0x0C */ - unsigned short res4; - unsigned short syss; /* 0x10 */ - unsigned short res4a; - unsigned short buf; /* 0x14 */ - unsigned short res5; - unsigned short cnt; /* 0x18 */ - unsigned short res6; - unsigned short data; /* 0x1C */ - unsigned short res7; - unsigned short sysc; /* 0x20 */ - unsigned short res8; - unsigned short con; /* 0x24 */ - unsigned short res9; - unsigned short oa; /* 0x28 */ - unsigned short res10; - unsigned short sa; /* 0x2C */ - unsigned short res11; - unsigned short psc; /* 0x30 */ - unsigned short res12; - unsigned short scll; /* 0x34 */ - unsigned short res13; - unsigned short sclh; /* 0x38 */ - unsigned short res14; - unsigned short systest; /* 0x3c */ - unsigned short res15; -}; - -static unsigned short wait_for_pin( void ); - -static void wait_for_bb( void ); - -static void flush_fifo( void ); - -void i2c_init( int speed, int slaveadd ); - -static int i2c_read_byte( - unsigned char devaddr, - unsigned char regoffset, - unsigned char *value -); - -int i2c_write( - unsigned char chip, - unsigned int addr, - int alen, - unsigned char *buffer, - int len -); - -int i2c_read( - unsigned char chip, - uint addr, - int alen, - unsigned char *buffer, - int len -); - -static int imw ( unsigned char chip, unsigned long addr, unsigned char byte ); - -static int imd( unsigned char chip, unsigned int addr, unsigned int length ); - -/** - * @brief Initializes the I2C module @a i2c. - * - * Valid @a clock_in_hz values are 100000 and 400000. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_INVALID_ID Invalid @a i2c value. - * @retval RTEMS_INVALID_CLOCK Invalid @a clock_in_hz value. - */ -rtems_status_code beagle_i2c_init( - volatile beagle_i2c *i2c, - unsigned clock_in_hz -); - -/** - * @brief Resets the I2C module @a i2c. - */ -void beagle_i2c_reset(volatile beagle_i2c *i2c); - -/** - * @brief Sets the I2C module @a i2c clock. - * - * Valid @a clock_in_hz values are 100000 and 400000. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_INVALID_CLOCK Invalid @a clock_in_hz value. - */ -rtems_status_code beagle_i2c_clock( - volatile beagle_i2c *i2c, - unsigned clock_in_hz -); - -/** - * @brief Starts a write transaction on the I2C module @a i2c. - * - * The address parameter @a addr must not contain the read/write bit. - * - * The error status may be delayed to the next - * beagle_i2c_write_with_optional_stop() due to controller flaws. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -rtems_status_code beagle_i2c_write_start( - volatile beagle_i2c *i2c, - unsigned addr -); - -/** - * @brief Writes data via the I2C module @a i2c with optional stop. - * - * The error status may be delayed to the next - * beagle_i2c_write_with_optional_stop() due to controller flaws. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -rtems_status_code beagle_i2c_write_with_optional_stop( - volatile beagle_i2c *i2c, - const uint8_t *out, - size_t n, - bool stop -); - -/** - * @brief Starts a read transaction on the I2C module @a i2c. - * - * The address parameter @a addr must not contain the read/write bit. - * - * The error status may be delayed to the next - * beagle_i2c_read_with_optional_stop() due to controller flaws. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -rtems_status_code beagle_i2c_read_start( - volatile beagle_i2c *i2c, - unsigned addr -); - -/** - * @brief Reads data via the I2C module @a i2c with optional stop. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - * @retval RTEMS_NOT_IMPLEMENTED Stop is @a false. - */ -rtems_status_code beagle_i2c_read_with_optional_stop( - volatile beagle_i2c *i2c, - uint8_t *in, - size_t n, - bool stop -); - -/** - * @brief Writes and reads data via the I2C module @a i2c. - * - * This will be one bus transaction. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -rtems_status_code beagle_i2c_write_and_read( - volatile beagle_i2c *i2c, - unsigned addr, - const uint8_t *out, - size_t out_size, - uint8_t *in, - size_t in_size -); - -/** - * @brief Writes data via the I2C module @a i2c. - * - * This will be one bus transaction. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -static inline rtems_status_code beagle_i2c_write( - volatile beagle_i2c *i2c, - unsigned addr, - const uint8_t *out, - size_t out_size -) -{ - return beagle_i2c_write_and_read(i2c, addr, out, out_size, NULL, 0); -} - -/** - * @brief Reads data via the I2C module @a i2c. - * - * This will be one bus transaction. - * - * @retval RTEMS_SUCCESSFUL Successful operation. - * @retval RTEMS_IO_ERROR Received a NACK from the slave. - */ -static inline rtems_status_code beagle_i2c_read( - volatile beagle_i2c *i2c, - unsigned addr, - uint8_t *in, - size_t in_size -) -{ - return beagle_i2c_write_and_read(i2c, addr, NULL, 0, in, in_size); -} - -#ifdef __cplusplus -} -#endif /* __cplusplus */ - -#endif /* LIBBSP_ARM_BEAGLE_I2C_H */ |