i2c: sh_i2c: Update to new CONFIG_SYS_I2C framework

This updates to new I2C framwwork on sh_i2c.
And this also updates boards(kzm9g and ecovec) that using sh_i2c.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 131 insertions, 163 deletions

diff --git a/drivers/i2c/sh_i2c.c b/drivers/i2c/sh_i2c.c
index 808202c..cc19100 100644
--- a/drivers/i2c/sh_i2c.c
+++ b/drivers/i2c/sh_i2c.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <i2c.h>
 #include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -22,8 +23,6 @@ struct sh_i2c {
 };
 #undef ureg
 
-static struct sh_i2c *base;
-
 /* ICCR */
 #define SH_I2C_ICCR_ICE		(1 << 7)
 #define SH_I2C_ICCR_RACK	(1 << 6)
@@ -43,202 +42,165 @@ static struct sh_i2c *base;
 #define SH_I2C_ICIC_ICCHB8	(1 << 6)
 #endif
 
+static const struct sh_i2c *i2c_dev[CONFIG_SYS_I2C_SH_NUM_CONTROLLERS] = {
+	(struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE0,
+#ifdef CONFIG_SYS_I2C_SH_BASE1
+	(struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE1,
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE2
+	(struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE2,
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE3
+	(struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE3,
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE4
+	(struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE4,
+#endif
+};
+
 static u16 iccl, icch;
 
 #define IRQ_WAIT 1000
 
-static void irq_dte(struct sh_i2c *base)
+static void sh_irq_dte(struct sh_i2c *dev)
 {
 	int i;
 
-	for (i = 0 ; i < IRQ_WAIT ; i++) {
-		if (SH_IC_DTE & readb(&base->icsr))
+	for (i = 0; i < IRQ_WAIT; i++) {
+		if (SH_IC_DTE & readb(&dev->icsr))
 			break;
 		udelay(10);
 	}
 }
 
-static int irq_dte_with_tack(struct sh_i2c *base)
+static int sh_irq_dte_with_tack(struct sh_i2c *dev)
 {
 	int i;
 
-	for (i = 0 ; i < IRQ_WAIT ; i++) {
-		if (SH_IC_DTE & readb(&base->icsr))
+	for (i = 0; i < IRQ_WAIT; i++) {
+		if (SH_IC_DTE & readb(&dev->icsr))
 			break;
-		if (SH_IC_TACK & readb(&base->icsr))
+		if (SH_IC_TACK & readb(&dev->icsr))
 			return -1;
 		udelay(10);
 	}
 	return 0;
 }
 
-static void irq_busy(struct sh_i2c *base)
+static void sh_irq_busy(struct sh_i2c *dev)
 {
 	int i;
 
-	for (i = 0 ; i < IRQ_WAIT ; i++) {
-		if (!(SH_IC_BUSY & readb(&base->icsr)))
+	for (i = 0; i < IRQ_WAIT; i++) {
+		if (!(SH_IC_BUSY & readb(&dev->icsr)))
 			break;
 		udelay(10);
 	}
 }
 
-static int i2c_set_addr(struct sh_i2c *base, u8 id, u8 reg, int stop)
+static int sh_i2c_set_addr(struct sh_i2c *dev, u8 chip, u8 addr, int stop)
 {
 	u8 icic = SH_IC_TACK;
 
-	clrbits_8(&base->iccr, SH_I2C_ICCR_ICE);
-	setbits_8(&base->iccr, SH_I2C_ICCR_ICE);
+	debug("%s: chip: %x, addr: %x iccl: %x, icch %x\n",
+				__func__, chip, addr, iccl, icch);
+	clrbits_8(&dev->iccr, SH_I2C_ICCR_ICE);
+	setbits_8(&dev->iccr, SH_I2C_ICCR_ICE);
 
-	writeb(iccl & 0xff, &base->iccl);
-	writeb(icch & 0xff, &base->icch);
+	writeb(iccl & 0xff, &dev->iccl);
+	writeb(icch & 0xff, &dev->icch);
 #ifdef CONFIG_SH_I2C_8BIT
 	if (iccl > 0xff)
 		icic |= SH_I2C_ICIC_ICCLB8;
 	if (icch > 0xff)
 		icic |= SH_I2C_ICIC_ICCHB8;
 #endif
-	writeb(icic, &base->icic);
+	writeb(icic, &dev->icic);
 
-	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &base->iccr);
-	irq_dte(base);
+	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &dev->iccr);
+	sh_irq_dte(dev);
 
-	clrbits_8(&base->icsr, SH_IC_TACK);
-	writeb(id << 1, &base->icdr);
-	if (irq_dte_with_tack(base) != 0)
+	clrbits_8(&dev->icsr, SH_IC_TACK);
+	writeb(chip << 1, &dev->icdr);
+	if (sh_irq_dte_with_tack(dev) != 0)
 		return -1;
 
-	writeb(reg, &base->icdr);
+	writeb(addr, &dev->icdr);
 	if (stop)
-		writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS), &base->iccr);
+		writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS), &dev->iccr);
 
-	if (irq_dte_with_tack(base) != 0)
+	if (sh_irq_dte_with_tack(dev) != 0)
 		return -1;
 	return 0;
 }
 
-static void i2c_finish(struct sh_i2c *base)
+static void sh_i2c_finish(struct sh_i2c *dev)
 {
-	writeb(0, &base->icsr);
-	clrbits_8(&base->iccr, SH_I2C_ICCR_ICE);
+	writeb(0, &dev->icsr);
+	clrbits_8(&dev->iccr, SH_I2C_ICCR_ICE);
 }
 
-static int i2c_raw_write(struct sh_i2c *base, u8 id, u8 reg, u8 val)
+static int
+sh_i2c_raw_write(struct sh_i2c *dev, u8 chip, uint addr, u8 val)
 {
 	int ret = -1;
-	if (i2c_set_addr(base, id, reg, 0) != 0)
+	if (sh_i2c_set_addr(dev, chip, addr, 0) != 0)
 		goto exit0;
 	udelay(10);
 
-	writeb(val, &base->icdr);
-	if (irq_dte_with_tack(base) != 0)
+	writeb(val, &dev->icdr);
+	if (sh_irq_dte_with_tack(dev) != 0)
 		goto exit0;
 
-	writeb((SH_I2C_ICCR_ICE | SH_I2C_ICCR_RTS), &base->iccr);
-	if (irq_dte_with_tack(base) != 0)
+	writeb((SH_I2C_ICCR_ICE | SH_I2C_ICCR_RTS), &dev->iccr);
+	if (sh_irq_dte_with_tack(dev) != 0)
 		goto exit0;
-	irq_busy(base);
+	sh_irq_busy(dev);
 	ret = 0;
+
 exit0:
-	i2c_finish(base);
+	sh_i2c_finish(dev);
 	return ret;
 }
 
-static int i2c_raw_read(struct sh_i2c *base, u8 id, u8 reg)
+static int sh_i2c_raw_read(struct sh_i2c *dev, u8 chip, u8 addr)
 {
 	int ret = -1;
 
 #if defined(CONFIG_SH73A0)
-	if (i2c_set_addr(base, id, reg, 0) != 0)
+	if (sh_i2c_set_addr(dev, chip, addr, 0) != 0)
 		goto exit0;
 #else
-	if (i2c_set_addr(base, id, reg, 1) != 0)
+	if (sh_i2c_set_addr(dev, chip, addr, 1) != 0)
 		goto exit0;
 	udelay(100);
 #endif
 
-	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &base->iccr);
-	irq_dte(base);
+	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &dev->iccr);
+	sh_irq_dte(dev);
 
-	writeb(id << 1 | 0x01, &base->icdr);
-	if (irq_dte_with_tack(base) != 0)
+	writeb(chip << 1 | 0x01, &dev->icdr);
+	if (sh_irq_dte_with_tack(dev) != 0)
 		goto exit0;
 
-	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_SCP), &base->iccr);
-	if (irq_dte_with_tack(base) != 0)
+	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_SCP), &dev->iccr);
+	if (sh_irq_dte_with_tack(dev) != 0)
 		goto exit0;
 
-	ret = readb(&base->icdr) & 0xff;
+	ret = readb(&dev->icdr) & 0xff;
+
+	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RACK), &dev->iccr);
+	readb(&dev->icdr); /* Dummy read */
+	sh_irq_busy(dev);
 
-	writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RACK), &base->iccr);
-	readb(&base->icdr); /* Dummy read */
-	irq_busy(base);
 exit0:
-	i2c_finish(base);
+	sh_i2c_finish(dev);
 
 	return ret;
 }
 
-#ifdef CONFIG_I2C_MULTI_BUS
-static unsigned int current_bus;
-
-/**
- * i2c_set_bus_num - change active I2C bus
- *	@bus: bus index, zero based
- *	@returns: 0 on success, non-0 on failure
- */
-int i2c_set_bus_num(unsigned int bus)
-{
-	if ((bus < 0) || (bus >= CONFIG_SYS_MAX_I2C_BUS)) {
-		printf("Bad bus: %d\n", bus);
-		return -1;
-	}
-
-	switch (bus) {
-	case 0:
-		base = (void *)CONFIG_SH_I2C_BASE0;
-		break;
-	case 1:
-		base = (void *)CONFIG_SH_I2C_BASE1;
-		break;
-#ifdef CONFIG_SH_I2C_BASE2
-	case 2:
-		base = (void *)CONFIG_SH_I2C_BASE2;
-		break;
-#endif
-#ifdef CONFIG_SH_I2C_BASE3
-	case 3:
-		base = (void *)CONFIG_SH_I2C_BASE3;
-		break;
-#endif
-#ifdef CONFIG_SH_I2C_BASE4
-	case 4:
-		base = (void *)CONFIG_SH_I2C_BASE4;
-		break;
-#endif
-	default:
-		return -1;
-	}
-	current_bus = bus;
-
-	return 0;
-}
-
-/**
- * i2c_get_bus_num - returns index of active I2C bus
- */
-unsigned int i2c_get_bus_num(void)
-{
-	return current_bus;
-}
-#endif
-
-#define SH_I2C_ICCL_CALC(clk, date, t_low, t_high) \
-		((clk / rate) * (t_low / t_low + t_high))
-#define SH_I2C_ICCH_CALC(clk, date, t_low, t_high) \
-		((clk / rate) * (t_high / t_low + t_high))
-
-void i2c_init(int speed, int slaveaddr)
+static void
+sh_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
 {
 	int num, denom, tmp;
 
@@ -246,11 +208,6 @@ void i2c_init(int speed, int slaveaddr)
 	if (!(gd->flags & GD_FLG_RELOC))
 		return;
 
-#ifdef CONFIG_I2C_MULTI_BUS
-	current_bus = 0;
-#endif
-	base = (struct sh_i2c *)CONFIG_SH_I2C_BASE0;
-
 	/*
 	 * Calculate the value for iccl. From the data sheet:
 	 * iccl = (p-clock / transfer-rate) * (L / (L + H))
@@ -272,67 +229,78 @@ void i2c_init(int speed, int slaveaddr)
 		icch = (u16)((num/denom) + 1);
 	else
 		icch = (u16)(num/denom);
+
+	debug("clock: %d, speed %d, iccl: %x, icch: %x\n",
+			CONFIG_SH_I2C_CLOCK, speed, iccl, icch);
 }
 
-/*
- * i2c_read: - Read multiple bytes from an i2c device
- *
- * The higher level routines take into account that this function is only
- * called with len < page length of the device (see configuration file)
- *
- * @chip:   address of the chip which is to be read
- * @addr:   i2c data address within the chip
- * @alen:   length of the i2c data address (1..2 bytes)
- * @buffer: where to write the data
- * @len:    how much byte do we want to read
- * @return: 0 in case of success
- */
-int i2c_read(u8 chip, u32 addr, int alen, u8 *buffer, int len)
+static int sh_i2c_read(struct i2c_adapter *adap, uint8_t chip,
+				uint addr, int alen, u8 *data, int len)
 {
-	int ret;
-	int i = 0;
-	for (i = 0 ; i < len ; i++) {
-		ret = i2c_raw_read(base, chip, addr + i);
+	int ret, i;
+	struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr];
+
+	for (i = 0; i < len; i++) {
+		ret = sh_i2c_raw_read(dev, chip, addr + i);
 		if (ret < 0)
 			return -1;
-		buffer[i] = ret & 0xff;
+
+		data[i] = ret & 0xff;
+		debug("%s: data[%d]: %02x\n", __func__, i, data[i]);
 	}
+
 	return 0;
 }
 
-/*
- * i2c_write: -  Write multiple bytes to an i2c device
- *
- * The higher level routines take into account that this function is only
- * called with len < page length of the device (see configuration file)
- *
- * @chip:   address of the chip which is to be written
- * @addr:   i2c data address within the chip
- * @alen:   length of the i2c data address (1..2 bytes)
- * @buffer: where to find the data to be written
- * @len:    how much byte do we want to read
- * @return: 0 in case of success
- */
-int i2c_write(u8 chip, u32 addr, int alen, u8 *buffer, int len)
+static int sh_i2c_write(struct i2c_adapter *adap, uint8_t chip, uint addr,
+				int alen, u8 *data, int len)
 {
-	int i = 0;
-	for (i = 0; i < len ; i++)
-		if (i2c_raw_write(base, chip, addr + i, buffer[i]) != 0)
+	struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr];
+	int i;
+
+	for (i = 0; i < len; i++) {
+		debug("%s: data[%d]: %02x\n", __func__, i, data[i]);
+		if (sh_i2c_raw_write(dev, chip, addr + i, data[i]) != 0)
 			return -1;
+	}
 	return 0;
 }
 
-/*
- * i2c_probe: - Test if a chip answers for a given i2c address
- *
- * @chip:   address of the chip which is searched for
- * @return: 0 if a chip was found, -1 otherwhise
- */
-int i2c_probe(u8 chip)
+static int
+sh_i2c_probe(struct i2c_adapter *adap, u8 dev)
 {
-	int ret;
+	return sh_i2c_read(adap, dev, 0, 0, NULL, 0);
+}
 
-	ret = i2c_set_addr(base, chip, 0, 1);
-	i2c_finish(base);
-	return ret;
+static unsigned int sh_i2c_set_bus_speed(struct i2c_adapter *adap,
+			unsigned int speed)
+{
+	struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr];
+
+	sh_i2c_finish(dev);
+	sh_i2c_init(adap, speed, 0);
+
+	return 0;
 }
+
+/*
+ * Register RCAR i2c adapters
+ */
+U_BOOT_I2C_ADAP_COMPLETE(sh_0, sh_i2c_init, sh_i2c_probe, sh_i2c_read,
+	sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED0, 0, 0)
+#ifdef CONFIG_SYS_I2C_SH_BASE1
+U_BOOT_I2C_ADAP_COMPLETE(sh_1, sh_i2c_init, sh_i2c_probe, sh_i2c_read,
+	sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED1, 0, 1)
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE2
+U_BOOT_I2C_ADAP_COMPLETE(sh_2, sh_i2c_init, sh_i2c_probe, sh_i2c_read,
+	sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED2, 0, 2)
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE3
+U_BOOT_I2C_ADAP_COMPLETE(sh_3, sh_i2c_init, sh_i2c_probe, sh_i2c_read,
+	sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED3, 0, 3)
+#endif
+#ifdef CONFIG_SYS_I2C_SH_BASE4
+U_BOOT_I2C_ADAP_COMPLETE(sh_4, sh_i2c_init, sh_i2c_probe, sh_i2c_read,
+	sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED4, 0, 4)
+#endif