+// SPDX-License-Identifier: GPL-2.0+
/*
+ * (C) Copyright 2009
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ * Changes for multibus/multiadapter I2C support.
+ *
* (C) Copyright 2001, 2002
* 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
- *
* This has been changed substantially by Gerald Van Baren, Custom IDEAS,
* vanbaren@cideas.com. It was heavily influenced by LiMon, written by
* Neil Russell.
+ *
+ * NOTE: This driver should be converted to driver model before June 2017.
+ * Please see doc/driver-model/i2c-howto.rst for instructions.
*/
#include <common.h>
-#ifdef CONFIG_MPC8260 /* only valid for MPC8260 */
-#include <ioports.h>
-#include <asm/io.h>
-#endif
-#if defined(CONFIG_AT91RM9200) || \
- defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9261) || \
- defined(CONFIG_AT91SAM9263)
+#if defined(CONFIG_AT91FAMILY)
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_pio.h>
-#ifdef CONFIG_AT91_LEGACY
+#ifdef CONFIG_ATMEL_LEGACY
#include <asm/arch/gpio.h>
#endif
#endif
-#ifdef CONFIG_IXP425 /* only valid for IXP425 */
-#include <asm/arch/ixp425.h>
-#endif
-#ifdef CONFIG_LPC2292
-#include <asm/arch/hardware.h>
-#endif
-#if defined(CONFIG_MPC852T) || defined(CONFIG_MPC866)
-#include <asm/io.h>
-#endif
#include <i2c.h>
+#include <linux/delay.h>
#if defined(CONFIG_SOFT_I2C_GPIO_SCL)
# include <asm/gpio.h>
/* #define DEBUG_I2C */
-#ifdef DEBUG_I2C
DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef I2C_SOFT_DECLARATIONS
+# define I2C_SOFT_DECLARATIONS
+#endif
+
+#if !defined(CONFIG_SYS_I2C_SOFT_SPEED)
+#define CONFIG_SYS_I2C_SOFT_SPEED CONFIG_SYS_I2C_SPEED
+#endif
+#if !defined(CONFIG_SYS_I2C_SOFT_SLAVE)
+#define CONFIG_SYS_I2C_SOFT_SLAVE CONFIG_SYS_I2C_SLAVE
#endif
/*-----------------------------------------------------------------------
* Definitions
*/
-
#define RETRIES 0
#define I2C_ACK 0 /* PD_SDA level to ack a byte */
#ifdef DEBUG_I2C
#define PRINTD(fmt,args...) do { \
- if (gd->have_console) \
printf (fmt ,##args); \
} while (0)
#else
#define PRINTD(fmt,args...)
#endif
-#if defined(CONFIG_I2C_MULTI_BUS)
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = 0;
-#endif /* CONFIG_I2C_MULTI_BUS */
-
/*-----------------------------------------------------------------------
* Local functions
*/
return(nack); /* not a nack is an ack */
}
-#if defined(CONFIG_I2C_MULTI_BUS)
-/*
- * Functions for multiple I2C bus handling
- */
-unsigned int i2c_get_bus_num(void)
-{
- return i2c_bus_num;
-}
-
-int i2c_set_bus_num(unsigned int bus)
-{
-#if defined(CONFIG_I2C_MUX)
- if (bus < CONFIG_SYS_MAX_I2C_BUS) {
- i2c_bus_num = bus;
- } else {
- int ret;
-
- ret = i2x_mux_select_mux(bus);
- if (ret == 0)
- i2c_bus_num = bus;
- else
- return ret;
- }
-#else
- if (bus >= CONFIG_SYS_MAX_I2C_BUS)
- return -1;
- i2c_bus_num = bus;
-#endif
- return 0;
-}
-#endif
-
/*-----------------------------------------------------------------------
* if ack == I2C_ACK, ACK the byte so can continue reading, else
* send I2C_NOACK to end the read.
return(data);
}
-/*=====================================================================*/
-/* Public Functions */
-/*=====================================================================*/
-
/*-----------------------------------------------------------------------
* Initialization
*/
-void i2c_init (int speed, int slaveaddr)
+static void soft_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr)
{
#if defined(CONFIG_SYS_I2C_INIT_BOARD)
/* call board specific i2c bus reset routine before accessing the */
* completion of EEPROM writes since the chip stops responding until
* the write completes (typically 10mSec).
*/
-int i2c_probe(uchar addr)
+static int soft_i2c_probe(struct i2c_adapter *adap, uint8_t addr)
{
int rc;
/*-----------------------------------------------------------------------
* Read bytes
*/
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
+static int soft_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *buffer, int len)
{
int shift;
PRINTD("i2c_read: chip %02X addr %02X alen %d buffer %p len %d\n",
/*-----------------------------------------------------------------------
* Write bytes
*/
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
+static int soft_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
+ int alen, uchar *buffer, int len)
{
int shift, failures = 0;
send_stop();
return(failures);
}
+
+/*
+ * Register soft i2c adapters
+ */
+U_BOOT_I2C_ADAP_COMPLETE(soft00, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED, CONFIG_SYS_I2C_SOFT_SLAVE,
+ 0)
+#if defined(I2C_SOFT_DECLARATIONS2)
+U_BOOT_I2C_ADAP_COMPLETE(soft01, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_2,
+ CONFIG_SYS_I2C_SOFT_SLAVE_2,
+ 1)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS3)
+U_BOOT_I2C_ADAP_COMPLETE(soft02, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_3,
+ CONFIG_SYS_I2C_SOFT_SLAVE_3,
+ 2)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS4)
+U_BOOT_I2C_ADAP_COMPLETE(soft03, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_4,
+ CONFIG_SYS_I2C_SOFT_SLAVE_4,
+ 3)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS5)
+U_BOOT_I2C_ADAP_COMPLETE(soft04, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_5,
+ CONFIG_SYS_I2C_SOFT_SLAVE_5,
+ 4)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS6)
+U_BOOT_I2C_ADAP_COMPLETE(soft05, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_6,
+ CONFIG_SYS_I2C_SOFT_SLAVE_6,
+ 5)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS7)
+U_BOOT_I2C_ADAP_COMPLETE(soft06, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_7,
+ CONFIG_SYS_I2C_SOFT_SLAVE_7,
+ 6)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS8)
+U_BOOT_I2C_ADAP_COMPLETE(soft07, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_8,
+ CONFIG_SYS_I2C_SOFT_SLAVE_8,
+ 7)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS9)
+U_BOOT_I2C_ADAP_COMPLETE(soft08, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_9,
+ CONFIG_SYS_I2C_SOFT_SLAVE_9,
+ 8)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS10)
+U_BOOT_I2C_ADAP_COMPLETE(soft09, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_10,
+ CONFIG_SYS_I2C_SOFT_SLAVE_10,
+ 9)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS11)
+U_BOOT_I2C_ADAP_COMPLETE(soft10, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_11,
+ CONFIG_SYS_I2C_SOFT_SLAVE_11,
+ 10)
+#endif
+#if defined(I2C_SOFT_DECLARATIONS12)
+U_BOOT_I2C_ADAP_COMPLETE(soft11, soft_i2c_init, soft_i2c_probe,
+ soft_i2c_read, soft_i2c_write, NULL,
+ CONFIG_SYS_I2C_SOFT_SPEED_12,
+ CONFIG_SYS_I2C_SOFT_SLAVE_12,
+ 11)
+#endif
projects / oweals / u-boot.git / blobdiff