/*
- * Copyright (C) 2011 Renesas Solutions Corp.
- * Copyright (C) 2011 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * Copyright (C) 2011, 2013 Renesas Solutions Corp.
+ * Copyright (C) 2011, 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <i2c.h>
#include <asm/io.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/* Every register is 32bit aligned, but only 8bits in size */
#define ureg(name) u8 name; u8 __pad_##name##0; u16 __pad_##name##1;
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)
#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;
-#ifdef CONFIG_I2C_MULTI_BUS
- current_bus = 0;
-#endif
- base = (struct sh_i2c *)CONFIG_SH_I2C_BASE0;
+ /* No i2c support prior to relocation */
+ if (!(gd->flags & GD_FLG_RELOC))
+ return;
/*
* Calculate the value for iccl. From the data sheet:
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;
+ u8 dummy[1];
- ret = i2c_set_addr(base, chip, 0, 1);
- i2c_finish(base);
- return ret;
+ return sh_i2c_read(adap, dev, 0, 0, dummy, sizeof dummy);
+}
+
+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
projects / karo-tx-uboot.git / blobdiff