i2c, davinci: convert driver to new mutlibus/mutliadapter framework

    - add davinci driver to new multibus/multiadpater support
    - adapted all config files, which uses this driver

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Heiko Schocher <hs@denx.de>

1 files changed, 234 insertions, 167 deletions

diff --git a/drivers/i2c/davinci_i2c.c b/drivers/i2c/davinci_i2c.c
index 6e5260c..9ca99c4 100644
--- a/drivers/i2c/davinci_i2c.c
+++ b/drivers/i2c/davinci_i2c.c
@@ -1,8 +1,9 @@
 /*
  * TI DaVinci (TMS320DM644x) I2C driver.
  *
- * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
- *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ * (C) Copyright 2007 Sergey Kubushyn <ksi@koi8.net>
  * --------------------------------------------------------
  *
  * SPDX-License-Identifier:	GPL-2.0+
@@ -12,306 +13,372 @@
 #include <i2c.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/i2c_defs.h>
+#include <asm/io.h>
 #include "davinci_i2c.h"
 
 #define CHECK_NACK() \
 	do {\
 		if (tmp & (I2C_TIMEOUT | I2C_STAT_NACK)) {\
-			REG(I2C_CON) = 0;\
-			return(1);\
-		}\
+			REG(&(i2c_base->i2c_con)) = 0;\
+			return 1;\
+		} \
 	} while (0)
 
+static struct i2c_regs *davinci_get_base(struct i2c_adapter *adap);
 
-static int wait_for_bus(void)
+static int wait_for_bus(struct i2c_adapter *adap)
 {
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
 	int	stat, timeout;
 
-	REG(I2C_STAT) = 0xffff;
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
 
 	for (timeout = 0; timeout < 10; timeout++) {
-		if (!((stat = REG(I2C_STAT)) & I2C_STAT_BB)) {
-			REG(I2C_STAT) = 0xffff;
-			return(0);
+		stat = REG(&(i2c_base->i2c_stat));
+		if (!((stat) & I2C_STAT_BB)) {
+			REG(&(i2c_base->i2c_stat)) = 0xffff;
+			return 0;
 		}
 
-		REG(I2C_STAT) = stat;
+		REG(&(i2c_base->i2c_stat)) = stat;
 		udelay(50000);
 	}
 
-	REG(I2C_STAT) = 0xffff;
-	return(1);
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
+	return 1;
 }
 
 
-static int poll_i2c_irq(int mask)
+static int poll_i2c_irq(struct i2c_adapter *adap, int mask)
 {
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
 	int	stat, timeout;
 
 	for (timeout = 0; timeout < 10; timeout++) {
 		udelay(1000);
-		stat = REG(I2C_STAT);
-		if (stat & mask) {
-			return(stat);
-		}
+		stat = REG(&(i2c_base->i2c_stat));
+		if (stat & mask)
+			return stat;
 	}
 
-	REG(I2C_STAT) = 0xffff;
-	return(stat | I2C_TIMEOUT);
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
+	return stat | I2C_TIMEOUT;
 }
 
-
-void flush_rx(void)
+static void flush_rx(struct i2c_adapter *adap)
 {
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
+
 	while (1) {
-		if (!(REG(I2C_STAT) & I2C_STAT_RRDY))
+		if (!(REG(&(i2c_base->i2c_stat)) & I2C_STAT_RRDY))
 			break;
 
-		REG(I2C_DRR);
-		REG(I2C_STAT) = I2C_STAT_RRDY;
+		REG(&(i2c_base->i2c_drr));
+		REG(&(i2c_base->i2c_stat)) = I2C_STAT_RRDY;
 		udelay(1000);
 	}
 }
 
+static uint davinci_i2c_setspeed(struct i2c_adapter *adap, uint speed)
+{
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
+	uint32_t	div, psc;
+
+	psc = 2;
+	/* SCLL + SCLH */
+	div = (CONFIG_SYS_HZ_CLOCK / ((psc + 1) * speed)) - 10;
+	REG(&(i2c_base->i2c_psc)) = psc; /* 27MHz / (2 + 1) = 9MHz */
+	REG(&(i2c_base->i2c_scll)) = (div * 50) / 100; /* 50% Duty */
+	REG(&(i2c_base->i2c_sclh)) = div - REG(&(i2c_base->i2c_scll));
+
+	adap->speed	= speed;
+	return 0;
+}
 
-void i2c_init(int speed, int slaveadd)
+static void davinci_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
 {
-	u_int32_t	div, psc;
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
 
-	if (REG(I2C_CON) & I2C_CON_EN) {
-		REG(I2C_CON) = 0;
-		udelay (50000);
+	if (REG(&(i2c_base->i2c_con)) & I2C_CON_EN) {
+		REG(&(i2c_base->i2c_con)) = 0;
+		udelay(50000);
 	}
 
-	psc = 2;
-	div = (CONFIG_SYS_HZ_CLOCK / ((psc + 1) * speed)) - 10;	/* SCLL + SCLH */
-	REG(I2C_PSC) = psc;			/* 27MHz / (2 + 1) = 9MHz */
-	REG(I2C_SCLL) = (div * 50) / 100;	/* 50% Duty */
-	REG(I2C_SCLH) = div - REG(I2C_SCLL);
+	davinci_i2c_setspeed(adap, speed);
 
-	REG(I2C_OA) = slaveadd;
-	REG(I2C_CNT) = 0;
+	REG(&(i2c_base->i2c_oa)) = slaveadd;
+	REG(&(i2c_base->i2c_cnt)) = 0;
 
 	/* Interrupts must be enabled or I2C module won't work */
-	REG(I2C_IE) = I2C_IE_SCD_IE | I2C_IE_XRDY_IE |
+	REG(&(i2c_base->i2c_ie)) = I2C_IE_SCD_IE | I2C_IE_XRDY_IE |
 		I2C_IE_RRDY_IE | I2C_IE_ARDY_IE | I2C_IE_NACK_IE;
 
 	/* Now enable I2C controller (get it out of reset) */
-	REG(I2C_CON) = I2C_CON_EN;
+	REG(&(i2c_base->i2c_con)) = I2C_CON_EN;
 
 	udelay(1000);
 }
 
-int i2c_set_bus_speed(unsigned int speed)
-{
-	i2c_init(speed, CONFIG_SYS_I2C_SLAVE);
-	return 0;
-}
-
-int i2c_probe(u_int8_t chip)
+static int davinci_i2c_probe(struct i2c_adapter *adap, uint8_t chip)
 {
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
 	int	rc = 1;
 
-	if (chip == REG(I2C_OA)) {
-		return(rc);
-	}
+	if (chip == REG(&(i2c_base->i2c_oa)))
+		return rc;
 
-	REG(I2C_CON) = 0;
-	if (wait_for_bus()) {return(1);}
+	REG(&(i2c_base->i2c_con)) = 0;
+	if (wait_for_bus(adap))
+		return 1;
 
 	/* try to read one byte from current (or only) address */
-	REG(I2C_CNT) = 1;
-	REG(I2C_SA) = chip;
-	REG(I2C_CON) = (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP);
-	udelay (50000);
+	REG(&(i2c_base->i2c_cnt)) = 1;
+	REG(&(i2c_base->i2c_sa))  = chip;
+	REG(&(i2c_base->i2c_con)) = (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT |
+				     I2C_CON_STP);
+	udelay(50000);
 
-	if (!(REG(I2C_STAT) & I2C_STAT_NACK)) {
+	if (!(REG(&(i2c_base->i2c_stat)) & I2C_STAT_NACK)) {
 		rc = 0;
-		flush_rx();
-		REG(I2C_STAT) = 0xffff;
+		flush_rx(adap);
+		REG(&(i2c_base->i2c_stat)) = 0xffff;
 	} else {
-		REG(I2C_STAT) = 0xffff;
-		REG(I2C_CON) |= I2C_CON_STP;
+		REG(&(i2c_base->i2c_stat)) = 0xffff;
+		REG(&(i2c_base->i2c_con)) |= I2C_CON_STP;
 		udelay(20000);
-		if (wait_for_bus()) {return(1);}
+		if (wait_for_bus(adap))
+			return 1;
 	}
 
-	flush_rx();
-	REG(I2C_STAT) = 0xffff;
-	REG(I2C_CNT) = 0;
-	return(rc);
+	flush_rx(adap);
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
+	REG(&(i2c_base->i2c_cnt)) = 0;
+	return rc;
 }
 
-
-int i2c_read(u_int8_t chip, u_int32_t addr, int alen, u_int8_t *buf, int len)
+static int davinci_i2c_read(struct i2c_adapter *adap, uint8_t chip,
+				uint32_t addr, int alen, uint8_t *buf, int len)
 {
-	u_int32_t	tmp;
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
+	uint32_t	tmp;
 	int		i;
 
 	if ((alen < 0) || (alen > 2)) {
-		printf("%s(): bogus address length %x\n", __FUNCTION__, alen);
-		return(1);
+		printf("%s(): bogus address length %x\n", __func__, alen);
+		return 1;
 	}
 
-	if (wait_for_bus()) {return(1);}
+	if (wait_for_bus(adap))
+		return 1;
 
 	if (alen != 0) {
 		/* Start address phase */
 		tmp = I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX;
-		REG(I2C_CNT) = alen;
-		REG(I2C_SA) = chip;
-		REG(I2C_CON) = tmp;
+		REG(&(i2c_base->i2c_cnt)) = alen;
+		REG(&(i2c_base->i2c_sa)) = chip;
+		REG(&(i2c_base->i2c_con)) = tmp;
 
-		tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK);
+		tmp = poll_i2c_irq(adap, I2C_STAT_XRDY | I2C_STAT_NACK);
 
 		CHECK_NACK();
 
 		switch (alen) {
-			case 2:
-				/* Send address MSByte */
-				if (tmp & I2C_STAT_XRDY) {
-					REG(I2C_DXR) = (addr >> 8) & 0xff;
-				} else {
-					REG(I2C_CON) = 0;
-					return(1);
-				}
-
-				tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK);
-
-				CHECK_NACK();
-				/* No break, fall through */
-			case 1:
-				/* Send address LSByte */
-				if (tmp & I2C_STAT_XRDY) {
-					REG(I2C_DXR) = addr & 0xff;
-				} else {
-					REG(I2C_CON) = 0;
-					return(1);
-				}
-
-				tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK | I2C_STAT_ARDY);
-
-				CHECK_NACK();
-
-				if (!(tmp & I2C_STAT_ARDY)) {
-					REG(I2C_CON) = 0;
-					return(1);
-				}
+		case 2:
+			/* Send address MSByte */
+			if (tmp & I2C_STAT_XRDY) {
+				REG(&(i2c_base->i2c_dxr)) = (addr >> 8) & 0xff;
+			} else {
+				REG(&(i2c_base->i2c_con)) = 0;
+				return 1;
+			}
+
+			tmp = poll_i2c_irq(adap, I2C_STAT_XRDY | I2C_STAT_NACK);
+
+			CHECK_NACK();
+			/* No break, fall through */
+		case 1:
+			/* Send address LSByte */
+			if (tmp & I2C_STAT_XRDY) {
+				REG(&(i2c_base->i2c_dxr)) = addr & 0xff;
+			} else {
+				REG(&(i2c_base->i2c_con)) = 0;
+				return 1;
+			}
+
+			tmp = poll_i2c_irq(adap, I2C_STAT_XRDY |
+					   I2C_STAT_NACK | I2C_STAT_ARDY);
+
+			CHECK_NACK();
+
+			if (!(tmp & I2C_STAT_ARDY)) {
+				REG(&(i2c_base->i2c_con)) = 0;
+				return 1;
+			}
 		}
 	}
 
 	/* Address phase is over, now read 'len' bytes and stop */
 	tmp = I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP;
-	REG(I2C_CNT) = len & 0xffff;
-	REG(I2C_SA) = chip;
-	REG(I2C_CON) = tmp;
+	REG(&(i2c_base->i2c_cnt)) = len & 0xffff;
+	REG(&(i2c_base->i2c_sa)) = chip;
+	REG(&(i2c_base->i2c_con)) = tmp;
 
 	for (i = 0; i < len; i++) {
-		tmp = poll_i2c_irq(I2C_STAT_RRDY | I2C_STAT_NACK | I2C_STAT_ROVR);
+		tmp = poll_i2c_irq(adap, I2C_STAT_RRDY | I2C_STAT_NACK |
+				   I2C_STAT_ROVR);
 
 		CHECK_NACK();
 
 		if (tmp & I2C_STAT_RRDY) {
-			buf[i] = REG(I2C_DRR);
+			buf[i] = REG(&(i2c_base->i2c_drr));
 		} else {
-			REG(I2C_CON) = 0;
-			return(1);
+			REG(&(i2c_base->i2c_con)) = 0;
+			return 1;
 		}
 	}
 
-	tmp = poll_i2c_irq(I2C_STAT_SCD | I2C_STAT_NACK);
+	tmp = poll_i2c_irq(adap, I2C_STAT_SCD | I2C_STAT_NACK);
 
 	CHECK_NACK();
 
 	if (!(tmp & I2C_STAT_SCD)) {
-		REG(I2C_CON) = 0;
-		return(1);
+		REG(&(i2c_base->i2c_con)) = 0;
+		return 1;
 	}
 
-	flush_rx();
-	REG(I2C_STAT) = 0xffff;
-	REG(I2C_CNT) = 0;
-	REG(I2C_CON) = 0;
+	flush_rx(adap);
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
+	REG(&(i2c_base->i2c_cnt)) = 0;
+	REG(&(i2c_base->i2c_con)) = 0;
 
-	return(0);
+	return 0;
 }
 
-
-int i2c_write(u_int8_t chip, u_int32_t addr, int alen, u_int8_t *buf, int len)
+static int davinci_i2c_write(struct i2c_adapter *adap, uint8_t chip,
+				uint32_t addr, int alen, uint8_t *buf, int len)
 {
-	u_int32_t	tmp;
+	struct i2c_regs *i2c_base = davinci_get_base(adap);
+	uint32_t	tmp;
 	int		i;
 
 	if ((alen < 0) || (alen > 2)) {
-		printf("%s(): bogus address length %x\n", __FUNCTION__, alen);
-		return(1);
+		printf("%s(): bogus address length %x\n", __func__, alen);
+		return 1;
 	}
 	if (len < 0) {
-		printf("%s(): bogus length %x\n", __FUNCTION__, len);
-		return(1);
+		printf("%s(): bogus length %x\n", __func__, len);
+		return 1;
 	}
 
-	if (wait_for_bus()) {return(1);}
+	if (wait_for_bus(adap))
+		return 1;
 
 	/* Start address phase */
-	tmp = I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX | I2C_CON_STP;
-	REG(I2C_CNT) = (alen == 0) ? len & 0xffff : (len & 0xffff) + alen;
-	REG(I2C_SA) = chip;
-	REG(I2C_CON) = tmp;
+	tmp = I2C_CON_EN | I2C_CON_MST | I2C_CON_STT |
+		I2C_CON_TRX | I2C_CON_STP;
+	REG(&(i2c_base->i2c_cnt)) = (alen == 0) ?
+		len & 0xffff : (len & 0xffff) + alen;
+	REG(&(i2c_base->i2c_sa)) = chip;
+	REG(&(i2c_base->i2c_con)) = tmp;
 
 	switch (alen) {
-		case 2:
-			/* Send address MSByte */
-			tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK);
+	case 2:
+		/* Send address MSByte */
+		tmp = poll_i2c_irq(adap, I2C_STAT_XRDY | I2C_STAT_NACK);
 
-			CHECK_NACK();
+		CHECK_NACK();
 
-			if (tmp & I2C_STAT_XRDY) {
-				REG(I2C_DXR) = (addr >> 8) & 0xff;
-			} else {
-				REG(I2C_CON) = 0;
-				return(1);
-			}
-			/* No break, fall through */
-		case 1:
-			/* Send address LSByte */
-			tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK);
+		if (tmp & I2C_STAT_XRDY) {
+			REG(&(i2c_base->i2c_dxr)) = (addr >> 8) & 0xff;
+		} else {
+			REG(&(i2c_base->i2c_con)) = 0;
+			return 1;
+		}
+		/* No break, fall through */
+	case 1:
+		/* Send address LSByte */
+		tmp = poll_i2c_irq(adap, I2C_STAT_XRDY | I2C_STAT_NACK);
 
-			CHECK_NACK();
+		CHECK_NACK();
 
-			if (tmp & I2C_STAT_XRDY) {
-				REG(I2C_DXR) = addr & 0xff;
-			} else {
-				REG(I2C_CON) = 0;
-				return(1);
-			}
+		if (tmp & I2C_STAT_XRDY) {
+			REG(&(i2c_base->i2c_dxr)) = addr & 0xff;
+		} else {
+			REG(&(i2c_base->i2c_con)) = 0;
+			return 1;
+		}
 	}
 
 	for (i = 0; i < len; i++) {
-		tmp = poll_i2c_irq(I2C_STAT_XRDY | I2C_STAT_NACK);
+		tmp = poll_i2c_irq(adap, I2C_STAT_XRDY | I2C_STAT_NACK);
 
 		CHECK_NACK();
 
-		if (tmp & I2C_STAT_XRDY) {
-			REG(I2C_DXR) = buf[i];
-		} else {
-			return(1);
-		}
+		if (tmp & I2C_STAT_XRDY)
+			REG(&(i2c_base->i2c_dxr)) = buf[i];
+		else
+			return 1;
 	}
 
-	tmp = poll_i2c_irq(I2C_STAT_SCD | I2C_STAT_NACK);
+	tmp = poll_i2c_irq(adap, I2C_STAT_SCD | I2C_STAT_NACK);
 
 	CHECK_NACK();
 
 	if (!(tmp & I2C_STAT_SCD)) {
-		REG(I2C_CON) = 0;
-		return(1);
+		REG(&(i2c_base->i2c_con)) = 0;
+		return 1;
 	}
 
-	flush_rx();
-	REG(I2C_STAT) = 0xffff;
-	REG(I2C_CNT) = 0;
-	REG(I2C_CON) = 0;
+	flush_rx(adap);
+	REG(&(i2c_base->i2c_stat)) = 0xffff;
+	REG(&(i2c_base->i2c_cnt)) = 0;
+	REG(&(i2c_base->i2c_con)) = 0;
+
+	return 0;
+}
+
+static struct i2c_regs *davinci_get_base(struct i2c_adapter *adap)
+{
+	switch (adap->hwadapnr) {
+#if I2C_BUS_MAX >= 3
+	case 2:
+		return (struct i2c_regs *)I2C2_BASE;
+#endif
+#if I2C_BUS_MAX >= 2
+	case 1:
+		return (struct i2c_regs *)I2C1_BASE;
+#endif
+	case 0:
+		return (struct i2c_regs *)I2C_BASE;
+
+	default:
+		printf("wrong hwadapnr: %d\n", adap->hwadapnr);
+	}
 
-	return(0);
+	return NULL;
 }
+
+U_BOOT_I2C_ADAP_COMPLETE(davinci_0, davinci_i2c_init, davinci_i2c_probe,
+			 davinci_i2c_read, davinci_i2c_write,
+			 davinci_i2c_setspeed,
+			 CONFIG_SYS_DAVINCI_I2C_SPEED,
+			 CONFIG_SYS_DAVINCI_I2C_SLAVE,
+			 0)
+
+#if I2C_BUS_MAX >= 2
+U_BOOT_I2C_ADAP_COMPLETE(davinci_1, davinci_i2c_init, davinci_i2c_probe,
+			 davinci_i2c_read, davinci_i2c_write,
+			 davinci_i2c_setspeed,
+			 CONFIG_SYS_DAVINCI_I2C_SPEED1,
+			 CONFIG_SYS_DAVINCI_I2C_SLAVE1,
+			 1)
+#endif
+
+#if I2C_BUS_MAX >= 3
+U_BOOT_I2C_ADAP_COMPLETE(davinci_2, davinci_i2c_init, davinci_i2c_probe,
+			 davinci_i2c_read, davinci_i2c_write,
+			 davinci_i2c_setspeed,
+			 CONFIG_SYS_DAVINCI_I2C_SPEED2,
+			 CONFIG_SYS_DAVINCI_I2C_SLAVE2,
+			 2)
+#endif