LIBS += disk/libdisk.a
LIBS += rtc/librtc.a
LIBS += dtt/libdtt.a
+LIBS += drivers/i2c/libi2c.a
LIBS += drivers/libdrivers.a
LIBS += drivers/bios_emulator/libatibiosemu.a
LIBS += drivers/nand/libnand.a
COBJS-y += usbtty.o
COBJS-y += videomodes.o
-#
-# I2C Drivers
-#
-COBJS-y += omap1510_i2c.o
-COBJS-y += omap24xx_i2c.o
-COBJS-y += tsi108_i2c.o
-COBJS-y += fsl_i2c.o
-
#
# Network Drivers
#
+++ /dev/null
-/*
- * Copyright 2006 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * Version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-
-#ifdef CONFIG_FSL_I2C
-#ifdef CONFIG_HARD_I2C
-
-#include <command.h>
-#include <i2c.h> /* Functional interface */
-
-#include <asm/io.h>
-#include <asm/fsl_i2c.h> /* HW definitions */
-
-#define I2C_TIMEOUT (CFG_HZ / 4)
-
-#define I2C_READ_BIT 1
-#define I2C_WRITE_BIT 0
-
-/* Initialize the bus pointer to whatever one the SPD EEPROM is on.
- * Default is bus 0. This is necessary because the DDR initialization
- * runs from ROM, and we can't switch buses because we can't modify
- * the global variables.
- */
-#ifdef CFG_SPD_BUS_NUM
-static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = CFG_SPD_BUS_NUM;
-#else
-static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
-#endif
-
-static volatile struct fsl_i2c *i2c_dev[2] = {
- (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET),
-#ifdef CFG_I2C2_OFFSET
- (struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET)
-#endif
-};
-
-void
-i2c_init(int speed, int slaveadd)
-{
- volatile struct fsl_i2c *dev;
-
- dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET);
-
- writeb(0, &dev->cr); /* stop I2C controller */
- udelay(5); /* let it shutdown in peace */
- writeb(0x3F, &dev->fdr); /* set bus speed */
- writeb(0x3F, &dev->dfsrr); /* set default filter */
- writeb(slaveadd << 1, &dev->adr); /* write slave address */
- writeb(0x0, &dev->sr); /* clear status register */
- writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
-
-#ifdef CFG_I2C2_OFFSET
- dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET);
-
- writeb(0, &dev->cr); /* stop I2C controller */
- udelay(5); /* let it shutdown in peace */
- writeb(0x3F, &dev->fdr); /* set bus speed */
- writeb(0x3F, &dev->dfsrr); /* set default filter */
- writeb(slaveadd << 1, &dev->adr); /* write slave address */
- writeb(0x0, &dev->sr); /* clear status register */
- writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
-#endif /* CFG_I2C2_OFFSET */
-}
-
-static __inline__ int
-i2c_wait4bus(void)
-{
- ulong timeval = get_timer(0);
-
- while (readb(&i2c_dev[i2c_bus_num]->sr) & I2C_SR_MBB) {
- if (get_timer(timeval) > I2C_TIMEOUT) {
- return -1;
- }
- }
-
- return 0;
-}
-
-static __inline__ int
-i2c_wait(int write)
-{
- u32 csr;
- ulong timeval = get_timer(0);
-
- do {
- csr = readb(&i2c_dev[i2c_bus_num]->sr);
- if (!(csr & I2C_SR_MIF))
- continue;
-
- writeb(0x0, &i2c_dev[i2c_bus_num]->sr);
-
- if (csr & I2C_SR_MAL) {
- debug("i2c_wait: MAL\n");
- return -1;
- }
-
- if (!(csr & I2C_SR_MCF)) {
- debug("i2c_wait: unfinished\n");
- return -1;
- }
-
- if (write == I2C_WRITE_BIT && (csr & I2C_SR_RXAK)) {
- debug("i2c_wait: No RXACK\n");
- return -1;
- }
-
- return 0;
- } while (get_timer (timeval) < I2C_TIMEOUT);
-
- debug("i2c_wait: timed out\n");
- return -1;
-}
-
-static __inline__ int
-i2c_write_addr (u8 dev, u8 dir, int rsta)
-{
- writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX
- | (rsta ? I2C_CR_RSTA : 0),
- &i2c_dev[i2c_bus_num]->cr);
-
- writeb((dev << 1) | dir, &i2c_dev[i2c_bus_num]->dr);
-
- if (i2c_wait(I2C_WRITE_BIT) < 0)
- return 0;
-
- return 1;
-}
-
-static __inline__ int
-__i2c_write(u8 *data, int length)
-{
- int i;
-
- writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX,
- &i2c_dev[i2c_bus_num]->cr);
-
- for (i = 0; i < length; i++) {
- writeb(data[i], &i2c_dev[i2c_bus_num]->dr);
-
- if (i2c_wait(I2C_WRITE_BIT) < 0)
- break;
- }
-
- return i;
-}
-
-static __inline__ int
-__i2c_read(u8 *data, int length)
-{
- int i;
-
- writeb(I2C_CR_MEN | I2C_CR_MSTA | ((length == 1) ? I2C_CR_TXAK : 0),
- &i2c_dev[i2c_bus_num]->cr);
-
- /* dummy read */
- readb(&i2c_dev[i2c_bus_num]->dr);
-
- for (i = 0; i < length; i++) {
- if (i2c_wait(I2C_READ_BIT) < 0)
- break;
-
- /* Generate ack on last next to last byte */
- if (i == length - 2)
- writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK,
- &i2c_dev[i2c_bus_num]->cr);
-
- /* Generate stop on last byte */
- if (i == length - 1)
- writeb(I2C_CR_MEN | I2C_CR_TXAK, &i2c_dev[i2c_bus_num]->cr);
-
- data[i] = readb(&i2c_dev[i2c_bus_num]->dr);
- }
-
- return i;
-}
-
-int
-i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
-{
- int i = -1; /* signal error */
- u8 *a = (u8*)&addr;
-
- if (i2c_wait4bus() >= 0
- && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
- && __i2c_write(&a[4 - alen], alen) == alen)
- i = 0; /* No error so far */
-
- if (length
- && i2c_write_addr(dev, I2C_READ_BIT, 1) != 0)
- i = __i2c_read(data, length);
-
- writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
-
- if (i == length)
- return 0;
-
- return -1;
-}
-
-int
-i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
-{
- int i = -1; /* signal error */
- u8 *a = (u8*)&addr;
-
- if (i2c_wait4bus() >= 0
- && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
- && __i2c_write(&a[4 - alen], alen) == alen) {
- i = __i2c_write(data, length);
- }
-
- writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
-
- if (i == length)
- return 0;
-
- return -1;
-}
-
-int
-i2c_probe(uchar chip)
-{
- /* For unknow reason the controller will ACK when
- * probing for a slave with the same address, so skip
- * it.
- */
- if (chip == (readb(&i2c_dev[i2c_bus_num]->adr) >> 1))
- return -1;
-
- return i2c_read(chip, 0, 0, NULL, 0);
-}
-
-uchar
-i2c_reg_read(uchar i2c_addr, uchar reg)
-{
- uchar buf[1];
-
- i2c_read(i2c_addr, reg, 1, buf, 1);
-
- return buf[0];
-}
-
-void
-i2c_reg_write(uchar i2c_addr, uchar reg, uchar val)
-{
- i2c_write(i2c_addr, reg, 1, &val, 1);
-}
-
-int i2c_set_bus_num(unsigned int bus)
-{
-#ifdef CFG_I2C2_OFFSET
- if (bus > 1) {
-#else
- if (bus > 0) {
-#endif
- return -1;
- }
-
- i2c_bus_num = bus;
-
- return 0;
-}
-
-int i2c_set_bus_speed(unsigned int speed)
-{
- return -1;
-}
-
-unsigned int i2c_get_bus_num(void)
-{
- return i2c_bus_num;
-}
-
-unsigned int i2c_get_bus_speed(void)
-{
- return 0;
-}
-#endif /* CONFIG_HARD_I2C */
-#endif /* CONFIG_FSL_I2C */
--- /dev/null
+#
+# (C) Copyright 2000-2007
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB := $(obj)libi2c.a
+
+COBJS-y += fsl_i2c.o
+COBJS-y += omap1510_i2c.o
+COBJS-y += omap24xx_i2c.o
+COBJS-y += tsi108_i2c.o
+
+COBJS := $(COBJS-y)
+SRCS := $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS))
+
+all: $(LIB)
+
+$(LIB): $(obj).depend $(OBJS)
+ $(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
--- /dev/null
+/*
+ * Copyright 2006 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_FSL_I2C
+#ifdef CONFIG_HARD_I2C
+
+#include <command.h>
+#include <i2c.h> /* Functional interface */
+
+#include <asm/io.h>
+#include <asm/fsl_i2c.h> /* HW definitions */
+
+#define I2C_TIMEOUT (CFG_HZ / 4)
+
+#define I2C_READ_BIT 1
+#define I2C_WRITE_BIT 0
+
+/* Initialize the bus pointer to whatever one the SPD EEPROM is on.
+ * Default is bus 0. This is necessary because the DDR initialization
+ * runs from ROM, and we can't switch buses because we can't modify
+ * the global variables.
+ */
+#ifdef CFG_SPD_BUS_NUM
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = CFG_SPD_BUS_NUM;
+#else
+static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
+#endif
+
+static volatile struct fsl_i2c *i2c_dev[2] = {
+ (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET),
+#ifdef CFG_I2C2_OFFSET
+ (struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET)
+#endif
+};
+
+void
+i2c_init(int speed, int slaveadd)
+{
+ volatile struct fsl_i2c *dev;
+
+ dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET);
+
+ writeb(0, &dev->cr); /* stop I2C controller */
+ udelay(5); /* let it shutdown in peace */
+ writeb(0x3F, &dev->fdr); /* set bus speed */
+ writeb(0x3F, &dev->dfsrr); /* set default filter */
+ writeb(slaveadd << 1, &dev->adr); /* write slave address */
+ writeb(0x0, &dev->sr); /* clear status register */
+ writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
+
+#ifdef CFG_I2C2_OFFSET
+ dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C2_OFFSET);
+
+ writeb(0, &dev->cr); /* stop I2C controller */
+ udelay(5); /* let it shutdown in peace */
+ writeb(0x3F, &dev->fdr); /* set bus speed */
+ writeb(0x3F, &dev->dfsrr); /* set default filter */
+ writeb(slaveadd << 1, &dev->adr); /* write slave address */
+ writeb(0x0, &dev->sr); /* clear status register */
+ writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
+#endif /* CFG_I2C2_OFFSET */
+}
+
+static __inline__ int
+i2c_wait4bus(void)
+{
+ ulong timeval = get_timer(0);
+
+ while (readb(&i2c_dev[i2c_bus_num]->sr) & I2C_SR_MBB) {
+ if (get_timer(timeval) > I2C_TIMEOUT) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static __inline__ int
+i2c_wait(int write)
+{
+ u32 csr;
+ ulong timeval = get_timer(0);
+
+ do {
+ csr = readb(&i2c_dev[i2c_bus_num]->sr);
+ if (!(csr & I2C_SR_MIF))
+ continue;
+
+ writeb(0x0, &i2c_dev[i2c_bus_num]->sr);
+
+ if (csr & I2C_SR_MAL) {
+ debug("i2c_wait: MAL\n");
+ return -1;
+ }
+
+ if (!(csr & I2C_SR_MCF)) {
+ debug("i2c_wait: unfinished\n");
+ return -1;
+ }
+
+ if (write == I2C_WRITE_BIT && (csr & I2C_SR_RXAK)) {
+ debug("i2c_wait: No RXACK\n");
+ return -1;
+ }
+
+ return 0;
+ } while (get_timer (timeval) < I2C_TIMEOUT);
+
+ debug("i2c_wait: timed out\n");
+ return -1;
+}
+
+static __inline__ int
+i2c_write_addr (u8 dev, u8 dir, int rsta)
+{
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX
+ | (rsta ? I2C_CR_RSTA : 0),
+ &i2c_dev[i2c_bus_num]->cr);
+
+ writeb((dev << 1) | dir, &i2c_dev[i2c_bus_num]->dr);
+
+ if (i2c_wait(I2C_WRITE_BIT) < 0)
+ return 0;
+
+ return 1;
+}
+
+static __inline__ int
+__i2c_write(u8 *data, int length)
+{
+ int i;
+
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX,
+ &i2c_dev[i2c_bus_num]->cr);
+
+ for (i = 0; i < length; i++) {
+ writeb(data[i], &i2c_dev[i2c_bus_num]->dr);
+
+ if (i2c_wait(I2C_WRITE_BIT) < 0)
+ break;
+ }
+
+ return i;
+}
+
+static __inline__ int
+__i2c_read(u8 *data, int length)
+{
+ int i;
+
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | ((length == 1) ? I2C_CR_TXAK : 0),
+ &i2c_dev[i2c_bus_num]->cr);
+
+ /* dummy read */
+ readb(&i2c_dev[i2c_bus_num]->dr);
+
+ for (i = 0; i < length; i++) {
+ if (i2c_wait(I2C_READ_BIT) < 0)
+ break;
+
+ /* Generate ack on last next to last byte */
+ if (i == length - 2)
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK,
+ &i2c_dev[i2c_bus_num]->cr);
+
+ /* Generate stop on last byte */
+ if (i == length - 1)
+ writeb(I2C_CR_MEN | I2C_CR_TXAK, &i2c_dev[i2c_bus_num]->cr);
+
+ data[i] = readb(&i2c_dev[i2c_bus_num]->dr);
+ }
+
+ return i;
+}
+
+int
+i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
+{
+ int i = -1; /* signal error */
+ u8 *a = (u8*)&addr;
+
+ if (i2c_wait4bus() >= 0
+ && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
+ && __i2c_write(&a[4 - alen], alen) == alen)
+ i = 0; /* No error so far */
+
+ if (length
+ && i2c_write_addr(dev, I2C_READ_BIT, 1) != 0)
+ i = __i2c_read(data, length);
+
+ writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
+
+ if (i == length)
+ return 0;
+
+ return -1;
+}
+
+int
+i2c_write(u8 dev, uint addr, int alen, u8 *data, int length)
+{
+ int i = -1; /* signal error */
+ u8 *a = (u8*)&addr;
+
+ if (i2c_wait4bus() >= 0
+ && i2c_write_addr(dev, I2C_WRITE_BIT, 0) != 0
+ && __i2c_write(&a[4 - alen], alen) == alen) {
+ i = __i2c_write(data, length);
+ }
+
+ writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
+
+ if (i == length)
+ return 0;
+
+ return -1;
+}
+
+int
+i2c_probe(uchar chip)
+{
+ /* For unknow reason the controller will ACK when
+ * probing for a slave with the same address, so skip
+ * it.
+ */
+ if (chip == (readb(&i2c_dev[i2c_bus_num]->adr) >> 1))
+ return -1;
+
+ return i2c_read(chip, 0, 0, NULL, 0);
+}
+
+uchar
+i2c_reg_read(uchar i2c_addr, uchar reg)
+{
+ uchar buf[1];
+
+ i2c_read(i2c_addr, reg, 1, buf, 1);
+
+ return buf[0];
+}
+
+void
+i2c_reg_write(uchar i2c_addr, uchar reg, uchar val)
+{
+ i2c_write(i2c_addr, reg, 1, &val, 1);
+}
+
+int i2c_set_bus_num(unsigned int bus)
+{
+#ifdef CFG_I2C2_OFFSET
+ if (bus > 1) {
+#else
+ if (bus > 0) {
+#endif
+ return -1;
+ }
+
+ i2c_bus_num = bus;
+
+ return 0;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+ return -1;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+ return i2c_bus_num;
+}
+
+unsigned int i2c_get_bus_speed(void)
+{
+ return 0;
+}
+#endif /* CONFIG_HARD_I2C */
+#endif /* CONFIG_FSL_I2C */
--- /dev/null
+/*
+ * Basic I2C functions
+ *
+ * Copyright (c) 2003 Texas Instruments
+ *
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the license found in the file
+ * named COPYING that should have accompanied this file.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Author: Jian Zhang jzhang@ti.com, Texas Instruments
+ *
+ * Copyright (c) 2003 Wolfgang Denk, wd@denx.de
+ * Rewritten to fit into the current U-Boot framework
+ *
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_DRIVER_OMAP1510_I2C
+
+static void wait_for_bb (void);
+static u16 wait_for_pin (void);
+
+void i2c_init (int speed, int slaveadd)
+{
+ u16 scl;
+
+ if (inw (I2C_CON) & I2C_CON_EN) {
+ outw (0, I2C_CON);
+ udelay (5000);
+ }
+
+ /* 12Mhz I2C module clock */
+ outw (0, I2C_PSC);
+ outw (I2C_CON_EN, I2C_CON);
+ outw (0, I2C_SYSTEST);
+ /* have to enable intrrupts or OMAP i2c module doesn't work */
+ outw (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
+ I2C_IE_NACK_IE | I2C_IE_AL_IE, I2C_IE);
+ scl = (12000000 / 2) / speed - 6;
+ outw (scl, I2C_SCLL);
+ outw (scl, I2C_SCLH);
+ /* own address */
+ outw (slaveadd, I2C_OA);
+ outw (0, I2C_CNT);
+ udelay (1000);
+}
+
+static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
+{
+ int i2c_error = 0;
+ u16 status;
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* one byte only */
+ outw (1, I2C_CNT);
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* no stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, I2C_CON);
+
+ status = wait_for_pin ();
+
+ if (status & I2C_STAT_XRDY) {
+ /* Important: have to use byte access */
+ *(volatile u8 *) (I2C_DATA) = regoffset;
+ udelay (20000);
+ if (inw (I2C_STAT) & I2C_STAT_NACK) {
+ i2c_error = 1;
+ }
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ /* free bus, otherwise we can't use a combined transction */
+ outw (0, I2C_CON);
+ while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (10000);
+ /* Have to clear pending interrupt to clear I2C_STAT */
+ inw (I2C_IV);
+ }
+
+ wait_for_bb ();
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* read one byte from slave */
+ outw (1, I2C_CNT);
+ /* need stop bit here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP,
+ I2C_CON);
+
+ status = wait_for_pin ();
+ if (status & I2C_STAT_RRDY) {
+ *value = inw (I2C_DATA);
+ udelay (20000);
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ outw (I2C_CON_EN, I2C_CON);
+ while (inw (I2C_STAT)
+ || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (10000);
+ inw (I2C_IV);
+ }
+ }
+ }
+
+ return i2c_error;
+}
+
+static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
+{
+ int i2c_error = 0;
+ u16 status;
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* two bytes */
+ outw (2, I2C_CNT);
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
+ I2C_CON_STP, I2C_CON);
+
+ /* wait until state change */
+ status = wait_for_pin ();
+
+ if (status & I2C_STAT_XRDY) {
+ /* send out two bytes */
+ outw ((value << 8) + regoffset, I2C_DATA);
+ /* must have enough delay to allow BB bit to go low */
+ udelay (30000);
+ if (inw (I2C_STAT) & I2C_STAT_NACK) {
+ i2c_error = 1;
+ }
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ outw (I2C_CON_EN, I2C_CON);
+ while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (1000);
+ /* have to read to clear intrrupt */
+ inw (I2C_IV);
+ }
+ }
+
+ return i2c_error;
+}
+
+int i2c_probe (uchar chip)
+{
+ int res = 1;
+
+ if (chip == inw (I2C_OA)) {
+ return res;
+ }
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* try to read one byte */
+ outw (1, I2C_CNT);
+ /* set slave address */
+ outw (chip, I2C_SA);
+ /* stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP, I2C_CON);
+ /* enough delay for the NACK bit set */
+ udelay (2000);
+ if (!(inw (I2C_STAT) & I2C_STAT_NACK)) {
+ res = 0;
+ } else {
+ outw (inw (I2C_CON) | I2C_CON_STP, I2C_CON);
+ udelay (20);
+ wait_for_bb ();
+ }
+
+ return res;
+}
+
+int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ int i;
+
+ if (alen > 1) {
+ printf ("I2C read: addr len %d not supported\n", alen);
+ return 1;
+ }
+
+ if (addr + len > 256) {
+ printf ("I2C read: address out of range\n");
+ return 1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (i2c_read_byte (chip, addr + i, &buffer[i])) {
+ printf ("I2C read: I/O error\n");
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ int i;
+
+ if (alen > 1) {
+ printf ("I2C read: addr len %d not supported\n", alen);
+ return 1;
+ }
+
+ if (addr + len > 256) {
+ printf ("I2C read: address out of range\n");
+ return 1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (i2c_write_byte (chip, addr + i, buffer[i])) {
+ printf ("I2C read: I/O error\n");
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void wait_for_bb (void)
+{
+ int timeout = 10;
+
+ while ((inw (I2C_STAT) & I2C_STAT_BB) && timeout--) {
+ inw (I2C_IV);
+ udelay (1000);
+ }
+
+ if (timeout <= 0) {
+ printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
+ inw (I2C_STAT));
+ }
+}
+
+static u16 wait_for_pin (void)
+{
+ u16 status, iv;
+ int timeout = 10;
+
+ do {
+ udelay (1000);
+ status = inw (I2C_STAT);
+ iv = inw (I2C_IV);
+ } while (!iv &&
+ !(status &
+ (I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
+ I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
+ I2C_STAT_AL)) && timeout--);
+
+ if (timeout <= 0) {
+ printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
+ inw (I2C_STAT));
+ }
+
+ return status;
+}
+
+#endif /* CONFIG_DRIVER_OMAP1510_I2C */
--- /dev/null
+/*
+ * Basic I2C functions
+ *
+ * Copyright (c) 2004 Texas Instruments
+ *
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the license found in the file
+ * named COPYING that should have accompanied this file.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Author: Jian Zhang jzhang@ti.com, Texas Instruments
+ *
+ * Copyright (c) 2003 Wolfgang Denk, wd@denx.de
+ * Rewritten to fit into the current U-Boot framework
+ *
+ * Adapted for OMAP2420 I2C, r-woodruff2@ti.com
+ *
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_DRIVER_OMAP24XX_I2C
+
+#include <asm/arch/i2c.h>
+#include <asm/io.h>
+
+#define inw(a) __raw_readw(a)
+#define outw(a,v) __raw_writew(a,v)
+
+static void wait_for_bb (void);
+static u16 wait_for_pin (void);
+static void flush_fifo(void);
+
+void i2c_init (int speed, int slaveadd)
+{
+ u16 scl;
+
+ outw(0x2, I2C_SYSC); /* for ES2 after soft reset */
+ udelay(1000);
+ outw(0x0, I2C_SYSC); /* will probably self clear but */
+
+ if (inw (I2C_CON) & I2C_CON_EN) {
+ outw (0, I2C_CON);
+ udelay (50000);
+ }
+
+ /* 12Mhz I2C module clock */
+ outw (0, I2C_PSC);
+ speed = speed/1000; /* 100 or 400 */
+ scl = ((12000/(speed*2)) - 7); /* use 7 when PSC = 0 */
+ outw (scl, I2C_SCLL);
+ outw (scl, I2C_SCLH);
+ /* own address */
+ outw (slaveadd, I2C_OA);
+ outw (I2C_CON_EN, I2C_CON);
+
+ /* have to enable intrrupts or OMAP i2c module doesn't work */
+ outw (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
+ I2C_IE_NACK_IE | I2C_IE_AL_IE, I2C_IE);
+ udelay (1000);
+ flush_fifo();
+ outw (0xFFFF, I2C_STAT);
+ outw (0, I2C_CNT);
+}
+
+static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
+{
+ int i2c_error = 0;
+ u16 status;
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* one byte only */
+ outw (1, I2C_CNT);
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* no stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, I2C_CON);
+
+ status = wait_for_pin ();
+
+ if (status & I2C_STAT_XRDY) {
+ /* Important: have to use byte access */
+ *(volatile u8 *) (I2C_DATA) = regoffset;
+ udelay (20000);
+ if (inw (I2C_STAT) & I2C_STAT_NACK) {
+ i2c_error = 1;
+ }
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ /* free bus, otherwise we can't use a combined transction */
+ outw (0, I2C_CON);
+ while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (10000);
+ /* Have to clear pending interrupt to clear I2C_STAT */
+ outw (0xFFFF, I2C_STAT);
+ }
+
+ wait_for_bb ();
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* read one byte from slave */
+ outw (1, I2C_CNT);
+ /* need stop bit here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP,
+ I2C_CON);
+
+ status = wait_for_pin ();
+ if (status & I2C_STAT_RRDY) {
+ *value = inw (I2C_DATA);
+ udelay (20000);
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ outw (I2C_CON_EN, I2C_CON);
+ while (inw (I2C_STAT)
+ || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (10000);
+ outw (0xFFFF, I2C_STAT);
+ }
+ }
+ }
+ flush_fifo();
+ outw (0xFFFF, I2C_STAT);
+ outw (0, I2C_CNT);
+ return i2c_error;
+}
+
+static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
+{
+ int i2c_error = 0;
+ u16 status, stat;
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* two bytes */
+ outw (2, I2C_CNT);
+ /* set slave address */
+ outw (devaddr, I2C_SA);
+ /* stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
+ I2C_CON_STP, I2C_CON);
+
+ /* wait until state change */
+ status = wait_for_pin ();
+
+ if (status & I2C_STAT_XRDY) {
+ /* send out two bytes */
+ outw ((value << 8) + regoffset, I2C_DATA);
+ /* must have enough delay to allow BB bit to go low */
+ udelay (50000);
+ if (inw (I2C_STAT) & I2C_STAT_NACK) {
+ i2c_error = 1;
+ }
+ } else {
+ i2c_error = 1;
+ }
+
+ if (!i2c_error) {
+ int eout = 200;
+
+ outw (I2C_CON_EN, I2C_CON);
+ while ((stat = inw (I2C_STAT)) || (inw (I2C_CON) & I2C_CON_MST)) {
+ udelay (1000);
+ /* have to read to clear intrrupt */
+ outw (0xFFFF, I2C_STAT);
+ if(--eout == 0) /* better leave with error than hang */
+ break;
+ }
+ }
+ flush_fifo();
+ outw (0xFFFF, I2C_STAT);
+ outw (0, I2C_CNT);
+ return i2c_error;
+}
+
+static void flush_fifo(void)
+{ u16 stat;
+
+ /* note: if you try and read data when its not there or ready
+ * you get a bus error
+ */
+ while(1){
+ stat = inw(I2C_STAT);
+ if(stat == I2C_STAT_RRDY){
+ inw(I2C_DATA);
+ outw(I2C_STAT_RRDY,I2C_STAT);
+ udelay(1000);
+ }else
+ break;
+ }
+}
+
+int i2c_probe (uchar chip)
+{
+ int res = 1; /* default = fail */
+
+ if (chip == inw (I2C_OA)) {
+ return res;
+ }
+
+ /* wait until bus not busy */
+ wait_for_bb ();
+
+ /* try to read one byte */
+ outw (1, I2C_CNT);
+ /* set slave address */
+ outw (chip, I2C_SA);
+ /* stop bit needed here */
+ outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP, I2C_CON);
+ /* enough delay for the NACK bit set */
+ udelay (50000);
+
+ if (!(inw (I2C_STAT) & I2C_STAT_NACK)) {
+ res = 0; /* success case */
+ flush_fifo();
+ outw(0xFFFF, I2C_STAT);
+ } else {
+ outw(0xFFFF, I2C_STAT); /* failue, clear sources*/
+ outw (inw (I2C_CON) | I2C_CON_STP, I2C_CON); /* finish up xfer */
+ udelay(20000);
+ wait_for_bb ();
+ }
+ flush_fifo();
+ outw (0, I2C_CNT); /* don't allow any more data in...we don't want it.*/
+ outw(0xFFFF, I2C_STAT);
+ return res;
+}
+
+int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ int i;
+
+ if (alen > 1) {
+ printf ("I2C read: addr len %d not supported\n", alen);
+ return 1;
+ }
+
+ if (addr + len > 256) {
+ printf ("I2C read: address out of range\n");
+ return 1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (i2c_read_byte (chip, addr + i, &buffer[i])) {
+ printf ("I2C read: I/O error\n");
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+ int i;
+
+ if (alen > 1) {
+ printf ("I2C read: addr len %d not supported\n", alen);
+ return 1;
+ }
+
+ if (addr + len > 256) {
+ printf ("I2C read: address out of range\n");
+ return 1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (i2c_write_byte (chip, addr + i, buffer[i])) {
+ printf ("I2C read: I/O error\n");
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void wait_for_bb (void)
+{
+ int timeout = 10;
+ u16 stat;
+
+ outw(0xFFFF, I2C_STAT); /* clear current interruts...*/
+ while ((stat = inw (I2C_STAT) & I2C_STAT_BB) && timeout--) {
+ outw (stat, I2C_STAT);
+ udelay (50000);
+ }
+
+ if (timeout <= 0) {
+ printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
+ inw (I2C_STAT));
+ }
+ outw(0xFFFF, I2C_STAT); /* clear delayed stuff*/
+}
+
+static u16 wait_for_pin (void)
+{
+ u16 status;
+ int timeout = 10;
+
+ do {
+ udelay (1000);
+ status = inw (I2C_STAT);
+ } while ( !(status &
+ (I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
+ I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
+ I2C_STAT_AL)) && timeout--);
+
+ if (timeout <= 0) {
+ printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
+ inw (I2C_STAT));
+ outw(0xFFFF, I2C_STAT);
+}
+ return status;
+}
+
+#endif /* CONFIG_DRIVER_OMAP24XX_I2C */
--- /dev/null
+/*
+ * (C) Copyright 2004 Tundra Semiconductor Corp.
+ * Author: Alex Bounine
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <config.h>
+#include <common.h>
+
+#ifdef CONFIG_TSI108_I2C
+#include <tsi108.h>
+
+#if defined(CONFIG_CMD_I2C)
+
+#define I2C_DELAY 100000
+#undef DEBUG_I2C
+
+#ifdef DEBUG_I2C
+#define DPRINT(x) printf (x)
+#else
+#define DPRINT(x)
+#endif
+
+/* All functions assume that Tsi108 I2C block is the only master on the bus */
+/* I2C read helper function */
+
+static int i2c_read_byte (
+ uint i2c_chan, /* I2C channel number: 0 - main, 1 - SDC SPD */
+ uchar chip_addr,/* I2C device address on the bus */
+ uint byte_addr, /* Byte address within I2C device */
+ uchar * buffer /* pointer to data buffer */
+ )
+{
+ u32 temp;
+ u32 to_count = I2C_DELAY;
+ u32 op_status = TSI108_I2C_TIMEOUT_ERR;
+ u32 chan_offset = TSI108_I2C_OFFSET;
+
+ DPRINT (("I2C read_byte() %d 0x%02x 0x%02x\n",
+ i2c_chan, chip_addr, byte_addr));
+
+ if (0 != i2c_chan)
+ chan_offset = TSI108_I2C_SDRAM_OFFSET;
+
+ /* Check if I2C operation is in progress */
+ temp = *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2);
+
+ if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS |
+ I2C_CNTRL2_START))) {
+ /* Set device address and operation (read = 0) */
+ temp = (byte_addr << 16) | ((chip_addr & 0x07) << 8) |
+ ((chip_addr >> 3) & 0x0F);
+ *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL1) =
+ temp;
+
+ /* Issue the read command
+ * (at this moment all other parameters are 0
+ * (size = 1 byte, lane = 0)
+ */
+
+ *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2) =
+ (I2C_CNTRL2_START);
+
+ /* Wait until operation completed */
+ do {
+ /* Read I2C operation status */
+ temp = *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2);
+
+ if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_START))) {
+ if (0 == (temp &
+ (I2C_CNTRL2_I2C_CFGERR |
+ I2C_CNTRL2_I2C_TO_ERR))
+ ) {
+ op_status = TSI108_I2C_SUCCESS;
+
+ temp = *(u32 *) (CFG_TSI108_CSR_BASE +
+ chan_offset +
+ I2C_RD_DATA);
+
+ *buffer = (u8) (temp & 0xFF);
+ } else {
+ /* report HW error */
+ op_status = TSI108_I2C_IF_ERROR;
+
+ DPRINT (("I2C HW error reported: 0x%02x\n", temp));
+ }
+
+ break;
+ }
+ } while (to_count--);
+ } else {
+ op_status = TSI108_I2C_IF_BUSY;
+
+ DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
+ }
+
+ DPRINT (("I2C read_byte() status: 0x%02x\n", op_status));
+ return op_status;
+}
+
+/*
+ * I2C Read interface as defined in "include/i2c.h" :
+ * chip_addr: I2C chip address, range 0..127
+ * (to read from SPD channel EEPROM use (0xD0 ... 0xD7)
+ * NOTE: The bit 7 in the chip_addr serves as a channel select.
+ * This hack is for enabling "isdram" command on Tsi108 boards
+ * without changes to common code. Used for I2C reads only.
+ * byte_addr: Memory or register address within the chip
+ * alen: Number of bytes to use for addr (typically 1, 2 for larger
+ * memories, 0 for register type devices with only one
+ * register)
+ * buffer: Pointer to destination buffer for data to be read
+ * len: How many bytes to read
+ *
+ * Returns: 0 on success, not 0 on failure
+ */
+
+int i2c_read (uchar chip_addr, uint byte_addr, int alen,
+ uchar * buffer, int len)
+{
+ u32 op_status = TSI108_I2C_PARAM_ERR;
+ u32 i2c_if = 0;
+
+ /* Hack to support second (SPD) I2C controller (SPD EEPROM read only).*/
+ if (0xD0 == (chip_addr & ~0x07)) {
+ i2c_if = 1;
+ chip_addr &= 0x7F;
+ }
+ /* Check for valid I2C address */
+ if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) {
+ while (len--) {
+ op_status = i2c_read_byte(i2c_if, chip_addr, byte_addr++, buffer++);
+
+ if (TSI108_I2C_SUCCESS != op_status) {
+ DPRINT (("I2C read_byte() failed: 0x%02x (%d left)\n", op_status, len));
+
+ break;
+ }
+ }
+ }
+
+ DPRINT (("I2C read() status: 0x%02x\n", op_status));
+ return op_status;
+}
+
+/* I2C write helper function */
+
+static int i2c_write_byte (uchar chip_addr,/* I2C device address on the bus */
+ uint byte_addr, /* Byte address within I2C device */
+ uchar * buffer /* pointer to data buffer */
+ )
+{
+ u32 temp;
+ u32 to_count = I2C_DELAY;
+ u32 op_status = TSI108_I2C_TIMEOUT_ERR;
+
+ /* Check if I2C operation is in progress */
+ temp = *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2);
+
+ if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) {
+ /* Place data into the I2C Tx Register */
+ *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
+ I2C_TX_DATA) = (u32) * buffer;
+
+ /* Set device address and operation */
+ temp =
+ I2C_CNTRL1_I2CWRITE | (byte_addr << 16) |
+ ((chip_addr & 0x07) << 8) | ((chip_addr >> 3) & 0x0F);
+ *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
+ I2C_CNTRL1) = temp;
+
+ /* Issue the write command (at this moment all other parameters
+ * are 0 (size = 1 byte, lane = 0)
+ */
+
+ *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
+ I2C_CNTRL2) = (I2C_CNTRL2_START);
+
+ op_status = TSI108_I2C_TIMEOUT_ERR;
+
+ /* Wait until operation completed */
+ do {
+ /* Read I2C operation status */
+ temp = *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2);
+
+ if (0 == (temp & (I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) {
+ if (0 == (temp &
+ (I2C_CNTRL2_I2C_CFGERR |
+ I2C_CNTRL2_I2C_TO_ERR))) {
+ op_status = TSI108_I2C_SUCCESS;
+ } else {
+ /* report detected HW error */
+ op_status = TSI108_I2C_IF_ERROR;
+
+ DPRINT (("I2C HW error reported: 0x%02x\n", temp));
+ }
+
+ break;
+ }
+
+ } while (to_count--);
+ } else {
+ op_status = TSI108_I2C_IF_BUSY;
+
+ DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
+ }
+
+ return op_status;
+}
+
+/*
+ * I2C Write interface as defined in "include/i2c.h" :
+ * chip_addr: I2C chip address, range 0..127
+ * byte_addr: Memory or register address within the chip
+ * alen: Number of bytes to use for addr (typically 1, 2 for larger
+ * memories, 0 for register type devices with only one
+ * register)
+ * buffer: Pointer to data to be written
+ * len: How many bytes to write
+ *
+ * Returns: 0 on success, not 0 on failure
+ */
+
+int i2c_write (uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
+ int len)
+{
+ u32 op_status = TSI108_I2C_PARAM_ERR;
+
+ /* Check for valid I2C address */
+ if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) {
+ while (len--) {
+ op_status =
+ i2c_write_byte (chip_addr, byte_addr++, buffer++);
+
+ if (TSI108_I2C_SUCCESS != op_status) {
+ DPRINT (("I2C write_byte() failed: 0x%02x (%d left)\n", op_status, len));
+
+ break;
+ }
+ }
+ }
+
+ return op_status;
+}
+
+/*
+ * I2C interface function as defined in "include/i2c.h".
+ * Probe the given I2C chip address by reading single byte from offset 0.
+ * Returns 0 if a chip responded, not 0 on failure.
+ */
+
+int i2c_probe (uchar chip)
+{
+ u32 tmp;
+
+ /*
+ * Try to read the first location of the chip.
+ * The Tsi108 HW doesn't support sending just the chip address
+ * and checkong for an <ACK> back.
+ */
+ return i2c_read (chip, 0, 1, (uchar *)&tmp, 1);
+}
+
+#endif
+#endif /* CONFIG_TSI108_I2C */
+++ /dev/null
-/*
- * Basic I2C functions
- *
- * Copyright (c) 2003 Texas Instruments
- *
- * This package is free software; you can redistribute it and/or
- * modify it under the terms of the license found in the file
- * named COPYING that should have accompanied this file.
- *
- * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Author: Jian Zhang jzhang@ti.com, Texas Instruments
- *
- * Copyright (c) 2003 Wolfgang Denk, wd@denx.de
- * Rewritten to fit into the current U-Boot framework
- *
- */
-
-#include <common.h>
-
-#ifdef CONFIG_DRIVER_OMAP1510_I2C
-
-static void wait_for_bb (void);
-static u16 wait_for_pin (void);
-
-void i2c_init (int speed, int slaveadd)
-{
- u16 scl;
-
- if (inw (I2C_CON) & I2C_CON_EN) {
- outw (0, I2C_CON);
- udelay (5000);
- }
-
- /* 12Mhz I2C module clock */
- outw (0, I2C_PSC);
- outw (I2C_CON_EN, I2C_CON);
- outw (0, I2C_SYSTEST);
- /* have to enable intrrupts or OMAP i2c module doesn't work */
- outw (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
- I2C_IE_NACK_IE | I2C_IE_AL_IE, I2C_IE);
- scl = (12000000 / 2) / speed - 6;
- outw (scl, I2C_SCLL);
- outw (scl, I2C_SCLH);
- /* own address */
- outw (slaveadd, I2C_OA);
- outw (0, I2C_CNT);
- udelay (1000);
-}
-
-static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
-{
- int i2c_error = 0;
- u16 status;
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* one byte only */
- outw (1, I2C_CNT);
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* no stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, I2C_CON);
-
- status = wait_for_pin ();
-
- if (status & I2C_STAT_XRDY) {
- /* Important: have to use byte access */
- *(volatile u8 *) (I2C_DATA) = regoffset;
- udelay (20000);
- if (inw (I2C_STAT) & I2C_STAT_NACK) {
- i2c_error = 1;
- }
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- /* free bus, otherwise we can't use a combined transction */
- outw (0, I2C_CON);
- while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (10000);
- /* Have to clear pending interrupt to clear I2C_STAT */
- inw (I2C_IV);
- }
-
- wait_for_bb ();
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* read one byte from slave */
- outw (1, I2C_CNT);
- /* need stop bit here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP,
- I2C_CON);
-
- status = wait_for_pin ();
- if (status & I2C_STAT_RRDY) {
- *value = inw (I2C_DATA);
- udelay (20000);
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- outw (I2C_CON_EN, I2C_CON);
- while (inw (I2C_STAT)
- || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (10000);
- inw (I2C_IV);
- }
- }
- }
-
- return i2c_error;
-}
-
-static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
-{
- int i2c_error = 0;
- u16 status;
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* two bytes */
- outw (2, I2C_CNT);
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
- I2C_CON_STP, I2C_CON);
-
- /* wait until state change */
- status = wait_for_pin ();
-
- if (status & I2C_STAT_XRDY) {
- /* send out two bytes */
- outw ((value << 8) + regoffset, I2C_DATA);
- /* must have enough delay to allow BB bit to go low */
- udelay (30000);
- if (inw (I2C_STAT) & I2C_STAT_NACK) {
- i2c_error = 1;
- }
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- outw (I2C_CON_EN, I2C_CON);
- while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (1000);
- /* have to read to clear intrrupt */
- inw (I2C_IV);
- }
- }
-
- return i2c_error;
-}
-
-int i2c_probe (uchar chip)
-{
- int res = 1;
-
- if (chip == inw (I2C_OA)) {
- return res;
- }
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* try to read one byte */
- outw (1, I2C_CNT);
- /* set slave address */
- outw (chip, I2C_SA);
- /* stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP, I2C_CON);
- /* enough delay for the NACK bit set */
- udelay (2000);
- if (!(inw (I2C_STAT) & I2C_STAT_NACK)) {
- res = 0;
- } else {
- outw (inw (I2C_CON) | I2C_CON_STP, I2C_CON);
- udelay (20);
- wait_for_bb ();
- }
-
- return res;
-}
-
-int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
- int i;
-
- if (alen > 1) {
- printf ("I2C read: addr len %d not supported\n", alen);
- return 1;
- }
-
- if (addr + len > 256) {
- printf ("I2C read: address out of range\n");
- return 1;
- }
-
- for (i = 0; i < len; i++) {
- if (i2c_read_byte (chip, addr + i, &buffer[i])) {
- printf ("I2C read: I/O error\n");
- i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
- return 1;
- }
- }
-
- return 0;
-}
-
-int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
- int i;
-
- if (alen > 1) {
- printf ("I2C read: addr len %d not supported\n", alen);
- return 1;
- }
-
- if (addr + len > 256) {
- printf ("I2C read: address out of range\n");
- return 1;
- }
-
- for (i = 0; i < len; i++) {
- if (i2c_write_byte (chip, addr + i, buffer[i])) {
- printf ("I2C read: I/O error\n");
- i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
- return 1;
- }
- }
-
- return 0;
-}
-
-static void wait_for_bb (void)
-{
- int timeout = 10;
-
- while ((inw (I2C_STAT) & I2C_STAT_BB) && timeout--) {
- inw (I2C_IV);
- udelay (1000);
- }
-
- if (timeout <= 0) {
- printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
- inw (I2C_STAT));
- }
-}
-
-static u16 wait_for_pin (void)
-{
- u16 status, iv;
- int timeout = 10;
-
- do {
- udelay (1000);
- status = inw (I2C_STAT);
- iv = inw (I2C_IV);
- } while (!iv &&
- !(status &
- (I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
- I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
- I2C_STAT_AL)) && timeout--);
-
- if (timeout <= 0) {
- printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
- inw (I2C_STAT));
- }
-
- return status;
-}
-
-#endif /* CONFIG_DRIVER_OMAP1510_I2C */
+++ /dev/null
-/*
- * Basic I2C functions
- *
- * Copyright (c) 2004 Texas Instruments
- *
- * This package is free software; you can redistribute it and/or
- * modify it under the terms of the license found in the file
- * named COPYING that should have accompanied this file.
- *
- * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Author: Jian Zhang jzhang@ti.com, Texas Instruments
- *
- * Copyright (c) 2003 Wolfgang Denk, wd@denx.de
- * Rewritten to fit into the current U-Boot framework
- *
- * Adapted for OMAP2420 I2C, r-woodruff2@ti.com
- *
- */
-
-#include <common.h>
-
-#ifdef CONFIG_DRIVER_OMAP24XX_I2C
-
-#include <asm/arch/i2c.h>
-#include <asm/io.h>
-
-#define inw(a) __raw_readw(a)
-#define outw(a,v) __raw_writew(a,v)
-
-static void wait_for_bb (void);
-static u16 wait_for_pin (void);
-static void flush_fifo(void);
-
-void i2c_init (int speed, int slaveadd)
-{
- u16 scl;
-
- outw(0x2, I2C_SYSC); /* for ES2 after soft reset */
- udelay(1000);
- outw(0x0, I2C_SYSC); /* will probably self clear but */
-
- if (inw (I2C_CON) & I2C_CON_EN) {
- outw (0, I2C_CON);
- udelay (50000);
- }
-
- /* 12Mhz I2C module clock */
- outw (0, I2C_PSC);
- speed = speed/1000; /* 100 or 400 */
- scl = ((12000/(speed*2)) - 7); /* use 7 when PSC = 0 */
- outw (scl, I2C_SCLL);
- outw (scl, I2C_SCLH);
- /* own address */
- outw (slaveadd, I2C_OA);
- outw (I2C_CON_EN, I2C_CON);
-
- /* have to enable intrrupts or OMAP i2c module doesn't work */
- outw (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
- I2C_IE_NACK_IE | I2C_IE_AL_IE, I2C_IE);
- udelay (1000);
- flush_fifo();
- outw (0xFFFF, I2C_STAT);
- outw (0, I2C_CNT);
-}
-
-static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
-{
- int i2c_error = 0;
- u16 status;
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* one byte only */
- outw (1, I2C_CNT);
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* no stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, I2C_CON);
-
- status = wait_for_pin ();
-
- if (status & I2C_STAT_XRDY) {
- /* Important: have to use byte access */
- *(volatile u8 *) (I2C_DATA) = regoffset;
- udelay (20000);
- if (inw (I2C_STAT) & I2C_STAT_NACK) {
- i2c_error = 1;
- }
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- /* free bus, otherwise we can't use a combined transction */
- outw (0, I2C_CON);
- while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (10000);
- /* Have to clear pending interrupt to clear I2C_STAT */
- outw (0xFFFF, I2C_STAT);
- }
-
- wait_for_bb ();
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* read one byte from slave */
- outw (1, I2C_CNT);
- /* need stop bit here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP,
- I2C_CON);
-
- status = wait_for_pin ();
- if (status & I2C_STAT_RRDY) {
- *value = inw (I2C_DATA);
- udelay (20000);
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- outw (I2C_CON_EN, I2C_CON);
- while (inw (I2C_STAT)
- || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (10000);
- outw (0xFFFF, I2C_STAT);
- }
- }
- }
- flush_fifo();
- outw (0xFFFF, I2C_STAT);
- outw (0, I2C_CNT);
- return i2c_error;
-}
-
-static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
-{
- int i2c_error = 0;
- u16 status, stat;
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* two bytes */
- outw (2, I2C_CNT);
- /* set slave address */
- outw (devaddr, I2C_SA);
- /* stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
- I2C_CON_STP, I2C_CON);
-
- /* wait until state change */
- status = wait_for_pin ();
-
- if (status & I2C_STAT_XRDY) {
- /* send out two bytes */
- outw ((value << 8) + regoffset, I2C_DATA);
- /* must have enough delay to allow BB bit to go low */
- udelay (50000);
- if (inw (I2C_STAT) & I2C_STAT_NACK) {
- i2c_error = 1;
- }
- } else {
- i2c_error = 1;
- }
-
- if (!i2c_error) {
- int eout = 200;
-
- outw (I2C_CON_EN, I2C_CON);
- while ((stat = inw (I2C_STAT)) || (inw (I2C_CON) & I2C_CON_MST)) {
- udelay (1000);
- /* have to read to clear intrrupt */
- outw (0xFFFF, I2C_STAT);
- if(--eout == 0) /* better leave with error than hang */
- break;
- }
- }
- flush_fifo();
- outw (0xFFFF, I2C_STAT);
- outw (0, I2C_CNT);
- return i2c_error;
-}
-
-static void flush_fifo(void)
-{ u16 stat;
-
- /* note: if you try and read data when its not there or ready
- * you get a bus error
- */
- while(1){
- stat = inw(I2C_STAT);
- if(stat == I2C_STAT_RRDY){
- inw(I2C_DATA);
- outw(I2C_STAT_RRDY,I2C_STAT);
- udelay(1000);
- }else
- break;
- }
-}
-
-int i2c_probe (uchar chip)
-{
- int res = 1; /* default = fail */
-
- if (chip == inw (I2C_OA)) {
- return res;
- }
-
- /* wait until bus not busy */
- wait_for_bb ();
-
- /* try to read one byte */
- outw (1, I2C_CNT);
- /* set slave address */
- outw (chip, I2C_SA);
- /* stop bit needed here */
- outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP, I2C_CON);
- /* enough delay for the NACK bit set */
- udelay (50000);
-
- if (!(inw (I2C_STAT) & I2C_STAT_NACK)) {
- res = 0; /* success case */
- flush_fifo();
- outw(0xFFFF, I2C_STAT);
- } else {
- outw(0xFFFF, I2C_STAT); /* failue, clear sources*/
- outw (inw (I2C_CON) | I2C_CON_STP, I2C_CON); /* finish up xfer */
- udelay(20000);
- wait_for_bb ();
- }
- flush_fifo();
- outw (0, I2C_CNT); /* don't allow any more data in...we don't want it.*/
- outw(0xFFFF, I2C_STAT);
- return res;
-}
-
-int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
- int i;
-
- if (alen > 1) {
- printf ("I2C read: addr len %d not supported\n", alen);
- return 1;
- }
-
- if (addr + len > 256) {
- printf ("I2C read: address out of range\n");
- return 1;
- }
-
- for (i = 0; i < len; i++) {
- if (i2c_read_byte (chip, addr + i, &buffer[i])) {
- printf ("I2C read: I/O error\n");
- i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
- return 1;
- }
- }
-
- return 0;
-}
-
-int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
- int i;
-
- if (alen > 1) {
- printf ("I2C read: addr len %d not supported\n", alen);
- return 1;
- }
-
- if (addr + len > 256) {
- printf ("I2C read: address out of range\n");
- return 1;
- }
-
- for (i = 0; i < len; i++) {
- if (i2c_write_byte (chip, addr + i, buffer[i])) {
- printf ("I2C read: I/O error\n");
- i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
- return 1;
- }
- }
-
- return 0;
-}
-
-static void wait_for_bb (void)
-{
- int timeout = 10;
- u16 stat;
-
- outw(0xFFFF, I2C_STAT); /* clear current interruts...*/
- while ((stat = inw (I2C_STAT) & I2C_STAT_BB) && timeout--) {
- outw (stat, I2C_STAT);
- udelay (50000);
- }
-
- if (timeout <= 0) {
- printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
- inw (I2C_STAT));
- }
- outw(0xFFFF, I2C_STAT); /* clear delayed stuff*/
-}
-
-static u16 wait_for_pin (void)
-{
- u16 status;
- int timeout = 10;
-
- do {
- udelay (1000);
- status = inw (I2C_STAT);
- } while ( !(status &
- (I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
- I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
- I2C_STAT_AL)) && timeout--);
-
- if (timeout <= 0) {
- printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
- inw (I2C_STAT));
- outw(0xFFFF, I2C_STAT);
-}
- return status;
-}
-
-#endif /* CONFIG_DRIVER_OMAP24XX_I2C */
+++ /dev/null
-/*
- * (C) Copyright 2004 Tundra Semiconductor Corp.
- * Author: Alex Bounine
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- */
-
-#include <config.h>
-#include <common.h>
-
-#ifdef CONFIG_TSI108_I2C
-#include <tsi108.h>
-
-#if defined(CONFIG_CMD_I2C)
-
-#define I2C_DELAY 100000
-#undef DEBUG_I2C
-
-#ifdef DEBUG_I2C
-#define DPRINT(x) printf (x)
-#else
-#define DPRINT(x)
-#endif
-
-/* All functions assume that Tsi108 I2C block is the only master on the bus */
-/* I2C read helper function */
-
-static int i2c_read_byte (
- uint i2c_chan, /* I2C channel number: 0 - main, 1 - SDC SPD */
- uchar chip_addr,/* I2C device address on the bus */
- uint byte_addr, /* Byte address within I2C device */
- uchar * buffer /* pointer to data buffer */
- )
-{
- u32 temp;
- u32 to_count = I2C_DELAY;
- u32 op_status = TSI108_I2C_TIMEOUT_ERR;
- u32 chan_offset = TSI108_I2C_OFFSET;
-
- DPRINT (("I2C read_byte() %d 0x%02x 0x%02x\n",
- i2c_chan, chip_addr, byte_addr));
-
- if (0 != i2c_chan)
- chan_offset = TSI108_I2C_SDRAM_OFFSET;
-
- /* Check if I2C operation is in progress */
- temp = *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2);
-
- if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS |
- I2C_CNTRL2_START))) {
- /* Set device address and operation (read = 0) */
- temp = (byte_addr << 16) | ((chip_addr & 0x07) << 8) |
- ((chip_addr >> 3) & 0x0F);
- *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL1) =
- temp;
-
- /* Issue the read command
- * (at this moment all other parameters are 0
- * (size = 1 byte, lane = 0)
- */
-
- *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2) =
- (I2C_CNTRL2_START);
-
- /* Wait until operation completed */
- do {
- /* Read I2C operation status */
- temp = *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2);
-
- if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_START))) {
- if (0 == (temp &
- (I2C_CNTRL2_I2C_CFGERR |
- I2C_CNTRL2_I2C_TO_ERR))
- ) {
- op_status = TSI108_I2C_SUCCESS;
-
- temp = *(u32 *) (CFG_TSI108_CSR_BASE +
- chan_offset +
- I2C_RD_DATA);
-
- *buffer = (u8) (temp & 0xFF);
- } else {
- /* report HW error */
- op_status = TSI108_I2C_IF_ERROR;
-
- DPRINT (("I2C HW error reported: 0x%02x\n", temp));
- }
-
- break;
- }
- } while (to_count--);
- } else {
- op_status = TSI108_I2C_IF_BUSY;
-
- DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
- }
-
- DPRINT (("I2C read_byte() status: 0x%02x\n", op_status));
- return op_status;
-}
-
-/*
- * I2C Read interface as defined in "include/i2c.h" :
- * chip_addr: I2C chip address, range 0..127
- * (to read from SPD channel EEPROM use (0xD0 ... 0xD7)
- * NOTE: The bit 7 in the chip_addr serves as a channel select.
- * This hack is for enabling "isdram" command on Tsi108 boards
- * without changes to common code. Used for I2C reads only.
- * byte_addr: Memory or register address within the chip
- * alen: Number of bytes to use for addr (typically 1, 2 for larger
- * memories, 0 for register type devices with only one
- * register)
- * buffer: Pointer to destination buffer for data to be read
- * len: How many bytes to read
- *
- * Returns: 0 on success, not 0 on failure
- */
-
-int i2c_read (uchar chip_addr, uint byte_addr, int alen,
- uchar * buffer, int len)
-{
- u32 op_status = TSI108_I2C_PARAM_ERR;
- u32 i2c_if = 0;
-
- /* Hack to support second (SPD) I2C controller (SPD EEPROM read only).*/
- if (0xD0 == (chip_addr & ~0x07)) {
- i2c_if = 1;
- chip_addr &= 0x7F;
- }
- /* Check for valid I2C address */
- if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) {
- while (len--) {
- op_status = i2c_read_byte(i2c_if, chip_addr, byte_addr++, buffer++);
-
- if (TSI108_I2C_SUCCESS != op_status) {
- DPRINT (("I2C read_byte() failed: 0x%02x (%d left)\n", op_status, len));
-
- break;
- }
- }
- }
-
- DPRINT (("I2C read() status: 0x%02x\n", op_status));
- return op_status;
-}
-
-/* I2C write helper function */
-
-static int i2c_write_byte (uchar chip_addr,/* I2C device address on the bus */
- uint byte_addr, /* Byte address within I2C device */
- uchar * buffer /* pointer to data buffer */
- )
-{
- u32 temp;
- u32 to_count = I2C_DELAY;
- u32 op_status = TSI108_I2C_TIMEOUT_ERR;
-
- /* Check if I2C operation is in progress */
- temp = *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2);
-
- if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) {
- /* Place data into the I2C Tx Register */
- *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
- I2C_TX_DATA) = (u32) * buffer;
-
- /* Set device address and operation */
- temp =
- I2C_CNTRL1_I2CWRITE | (byte_addr << 16) |
- ((chip_addr & 0x07) << 8) | ((chip_addr >> 3) & 0x0F);
- *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
- I2C_CNTRL1) = temp;
-
- /* Issue the write command (at this moment all other parameters
- * are 0 (size = 1 byte, lane = 0)
- */
-
- *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
- I2C_CNTRL2) = (I2C_CNTRL2_START);
-
- op_status = TSI108_I2C_TIMEOUT_ERR;
-
- /* Wait until operation completed */
- do {
- /* Read I2C operation status */
- temp = *(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2);
-
- if (0 == (temp & (I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) {
- if (0 == (temp &
- (I2C_CNTRL2_I2C_CFGERR |
- I2C_CNTRL2_I2C_TO_ERR))) {
- op_status = TSI108_I2C_SUCCESS;
- } else {
- /* report detected HW error */
- op_status = TSI108_I2C_IF_ERROR;
-
- DPRINT (("I2C HW error reported: 0x%02x\n", temp));
- }
-
- break;
- }
-
- } while (to_count--);
- } else {
- op_status = TSI108_I2C_IF_BUSY;
-
- DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
- }
-
- return op_status;
-}
-
-/*
- * I2C Write interface as defined in "include/i2c.h" :
- * chip_addr: I2C chip address, range 0..127
- * byte_addr: Memory or register address within the chip
- * alen: Number of bytes to use for addr (typically 1, 2 for larger
- * memories, 0 for register type devices with only one
- * register)
- * buffer: Pointer to data to be written
- * len: How many bytes to write
- *
- * Returns: 0 on success, not 0 on failure
- */
-
-int i2c_write (uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
- int len)
-{
- u32 op_status = TSI108_I2C_PARAM_ERR;
-
- /* Check for valid I2C address */
- if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) {
- while (len--) {
- op_status =
- i2c_write_byte (chip_addr, byte_addr++, buffer++);
-
- if (TSI108_I2C_SUCCESS != op_status) {
- DPRINT (("I2C write_byte() failed: 0x%02x (%d left)\n", op_status, len));
-
- break;
- }
- }
- }
-
- return op_status;
-}
-
-/*
- * I2C interface function as defined in "include/i2c.h".
- * Probe the given I2C chip address by reading single byte from offset 0.
- * Returns 0 if a chip responded, not 0 on failure.
- */
-
-int i2c_probe (uchar chip)
-{
- u32 tmp;
-
- /*
- * Try to read the first location of the chip.
- * The Tsi108 HW doesn't support sending just the chip address
- * and checkong for an <ACK> back.
- */
- return i2c_read (chip, 0, 1, (uchar *)&tmp, 1);
-}
-
-#endif
-#endif /* CONFIG_TSI108_I2C */
projects / oweals / u-boot.git / commitdiff