mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
4bef53684f
Update this driver to use the new standard enums for speed. Note: This driver needs to move to driver model. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
149 lines
5.1 KiB
C
149 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* (C) Copyright 2004-2010
|
|
* Texas Instruments, <www.ti.com>
|
|
*/
|
|
#ifndef _OMAP2PLUS_I2C_H_
|
|
#define _OMAP2PLUS_I2C_H_
|
|
|
|
/* I2C masks */
|
|
|
|
/* 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 */
|
|
|
|
/* 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 Code Register (I2C_INTCODE): */
|
|
|
|
#define I2C_INTCODE_MASK 7
|
|
#define I2C_INTCODE_NONE 0
|
|
#define I2C_INTCODE_AL 1 /* Arbitration lost */
|
|
#define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */
|
|
#define I2C_INTCODE_ARDY 3 /* Register access ready */
|
|
#define I2C_INTCODE_RRDY 4 /* Rcv data ready */
|
|
#define I2C_INTCODE_XRDY 5 /* Xmit data ready */
|
|
|
|
/* I2C Buffer Configuration Register (I2C_BUF): */
|
|
|
|
#define I2C_BUF_RDMA_EN (1 << 15) /* Receive DMA channel enable */
|
|
#define I2C_BUF_XDMA_EN (1 << 7) /* Transmit DMA channel enable */
|
|
|
|
/* 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 System Test Register (I2C_SYSTEST): */
|
|
|
|
#define I2C_SYSTEST_ST_EN (1 << 15) /* System test enable */
|
|
#define I2C_SYSTEST_FREE (1 << 14) /* Free running mode, on brkpoint) */
|
|
#define I2C_SYSTEST_TMODE_MASK (3 << 12) /* Test mode select */
|
|
#define I2C_SYSTEST_TMODE_SHIFT (12) /* Test mode select */
|
|
#define I2C_SYSTEST_SCL_I (1 << 3) /* SCL line sense input value */
|
|
#define I2C_SYSTEST_SCL_O (1 << 2) /* SCL line drive output value */
|
|
#define I2C_SYSTEST_SDA_I (1 << 1) /* SDA line sense input value */
|
|
#define I2C_SYSTEST_SDA_O (1 << 0) /* SDA line drive output value */
|
|
|
|
/* I2C System Status Register (I2C_SYSS): */
|
|
|
|
#define I2C_SYSS_RDONE (1 << 0) /* Internel reset monitoring */
|
|
|
|
#define I2C_SCLL_SCLL 0
|
|
#define I2C_SCLL_SCLL_M 0xFF
|
|
#define I2C_SCLL_HSSCLL 8
|
|
#define I2C_SCLH_HSSCLL_M 0xFF
|
|
#define I2C_SCLH_SCLH 0
|
|
#define I2C_SCLH_SCLH_M 0xFF
|
|
#define I2C_SCLH_HSSCLH 8
|
|
#define I2C_SCLH_HSSCLH_M 0xFF
|
|
|
|
#define SYSTEM_CLOCK_12 12000000
|
|
#define SYSTEM_CLOCK_13 13000000
|
|
#define SYSTEM_CLOCK_192 19200000
|
|
#define SYSTEM_CLOCK_96 96000000
|
|
|
|
/* 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
|
|
|
|
/*
|
|
* 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 4.9 kernel uses
|
|
* scll_trim = 7
|
|
* sclh_trim = 5
|
|
*
|
|
* These are the trim values for standard and fast speed
|
|
*/
|
|
#ifndef I2C_FASTSPEED_SCLL_TRIM
|
|
#define I2C_FASTSPEED_SCLL_TRIM 7
|
|
#endif
|
|
#ifndef I2C_FASTSPEED_SCLH_TRIM
|
|
#define I2C_FASTSPEED_SCLH_TRIM 5
|
|
#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 I2C_PSC_MAX 0x0f
|
|
#define I2C_PSC_MIN 0x00
|
|
|
|
#endif /* _OMAP24XX_I2C_H_ */
|