ARMV7: Restructure OMAP i2c driver to allow code sharing between OMAP3 and OMAP4

This patch modifies the omap24xx driver so that it will also work with OMAP4.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 4 insertions, 145 deletions

diff --git a/arch/arm/include/asm/arch-omap3/i2c.h b/arch/arm/include/asm/arch-omap3/i2c.h
index 490e03bb65..7a4a73aa91 100644
--- a/arch/arm/include/asm/arch-omap3/i2c.h
+++ b/arch/arm/include/asm/arch-omap3/i2c.h
@@ -20,9 +20,10 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */
-#ifndef _I2C_H_
-#define _I2C_H_
+#ifndef _OMAP3_I2C_H_
+#define _OMAP3_I2C_H_
 
+#define I2C_BUS_MAX	3
 #define I2C_DEFAULT_BASE	I2C_BASE1
 
 struct i2c {
@@ -58,146 +59,4 @@ struct i2c {
 	unsigned short res15;
 };
 
-#define I2C_BUS_MAX	3
-
-/* 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 */
-
-#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 OMAP_I2C_STANDARD	100000
-#define OMAP_I2C_FAST_MODE	400000
-#define OMAP_I2C_HIGH_SPEED	3400000
-
-#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 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 I2C_PSC_MAX		0x0f
-#define I2C_PSC_MIN		0x00
-
-#endif /* _I2C_H_ */
+#endif /* _OMAP3_I2C_H_ */