diff options
| -rw-r--r-- | board/keymile/common/common.c | 71 | ||||
| -rw-r--r-- | board/keymile/common/common.h | 3 | ||||
| -rw-r--r-- | board/keymile/km83xx/Makefile | 2 | ||||
| -rw-r--r-- | board/keymile/km83xx/km83xx_i2c.c | 88 |
4 files changed, 98 insertions, 66 deletions
diff --git a/board/keymile/common/common.c b/board/keymile/common/common.c index 612dd2a0510..f26230648d4 100644 --- a/board/keymile/common/common.c +++ b/board/keymile/common/common.c @@ -39,7 +39,10 @@ #include <i2c.h> #endif +#if !defined(CONFIG_MPC83xx) static void i2c_write_start_seq(void); +#endif + DECLARE_GLOBAL_DATA_PTR; /* @@ -89,9 +92,7 @@ int set_km_env(void) return 0; } -#define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */ -#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) - +#if defined(CONFIG_SYS_I2C_INIT_BOARD) #if !defined(CONFIG_MPC83xx) static void i2c_write_start_seq(void) { @@ -171,68 +172,6 @@ int i2c_make_abort(void) #endif return ret; } -#endif /* !MPC83xx */ - -#if defined(CONFIG_MPC83xx) -static void i2c_write_start_seq(void) -{ - struct fsl_i2c *dev; - dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); - udelay(DELAY_ABORT_SEQ); - out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); - udelay(DELAY_ABORT_SEQ); - out_8(&dev->cr, (I2C_CR_MEN)); -} - -int i2c_make_abort(void) -{ - struct fsl_i2c *dev; - dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); - uchar dummy; - uchar last; - int nbr_read = 0; - int i = 0; - int ret = 0; - - /* wait after each operation to finsh with a delay */ - out_8(&dev->cr, (I2C_CR_MSTA)); - udelay(DELAY_ABORT_SEQ); - out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); - udelay(DELAY_ABORT_SEQ); - dummy = in_8(&dev->dr); - udelay(DELAY_ABORT_SEQ); - last = in_8(&dev->dr); - nbr_read++; - - /* - * do read until the last bit is 1, but stop if the full eeprom is - * read. - */ - while (((last & 0x01) != 0x01) && - (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { - udelay(DELAY_ABORT_SEQ); - last = in_8(&dev->dr); - nbr_read++; - } - if ((last & 0x01) != 0x01) - ret = -2; - if ((last != 0xff) || (nbr_read > 1)) - printf("[INFO] i2c abort after %d bytes (0x%02x)\n", - nbr_read, last); - udelay(DELAY_ABORT_SEQ); - out_8(&dev->cr, (I2C_CR_MEN)); - udelay(DELAY_ABORT_SEQ); - /* clear status reg */ - out_8(&dev->sr, 0); - - for (i = 0; i < 5; i++) - i2c_write_start_seq(); - if (ret != 0) - printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", - nbr_read, last); - - return ret; -} #endif /** @@ -244,6 +183,8 @@ void i2c_init_board(void) /* Now run the AbortSequence() */ i2c_make_abort(); } +#endif + #if !defined(MACH_TYPE_KM_KIRKWOOD) int ethernet_present(void) diff --git a/board/keymile/common/common.h b/board/keymile/common/common.h index 0fb19cf3312..6c1f6400c25 100644 --- a/board/keymile/common/common.h +++ b/board/keymile/common/common.h @@ -136,6 +136,9 @@ int fdt_get_node_and_value(void *blob, char *propname, void **var); +#define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */ +#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) + int i2c_soft_read_pin(void); int i2c_make_abort(void); #endif /* __KEYMILE_COMMON_H */ diff --git a/board/keymile/km83xx/Makefile b/board/keymile/km83xx/Makefile index 72945e28336..472768a666c 100644 --- a/board/keymile/km83xx/Makefile +++ b/board/keymile/km83xx/Makefile @@ -28,7 +28,7 @@ endif LIB = $(obj)lib$(BOARD).o -COBJS += $(BOARD).o ../common/common.o ../common/ivm.o +COBJS += $(BOARD).o ../common/common.o ../common/ivm.o $(BOARD)_i2c.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/keymile/km83xx/km83xx_i2c.c b/board/keymile/km83xx/km83xx_i2c.c new file mode 100644 index 00000000000..be177753c59 --- /dev/null +++ b/board/keymile/km83xx/km83xx_i2c.c @@ -0,0 +1,88 @@ +/* + * (C) Copyright 2011 + * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com + * + * 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 <common.h> +#include <i2c.h> +#include <asm/io.h> +#include <linux/ctype.h> +#include "../common/common.h" + +static void i2c_write_start_seq(void) +{ + struct fsl_i2c *dev; + dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); + udelay(DELAY_ABORT_SEQ); + out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); + udelay(DELAY_ABORT_SEQ); + out_8(&dev->cr, (I2C_CR_MEN)); +} + +int i2c_make_abort(void) +{ + struct fsl_i2c *dev; + dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); + uchar dummy; + uchar last; + int nbr_read = 0; + int i = 0; + int ret = 0; + + /* wait after each operation to finsh with a delay */ + out_8(&dev->cr, (I2C_CR_MSTA)); + udelay(DELAY_ABORT_SEQ); + out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); + udelay(DELAY_ABORT_SEQ); + dummy = in_8(&dev->dr); + udelay(DELAY_ABORT_SEQ); + last = in_8(&dev->dr); + nbr_read++; + + /* + * do read until the last bit is 1, but stop if the full eeprom is + * read. + */ + while (((last & 0x01) != 0x01) && + (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { + udelay(DELAY_ABORT_SEQ); + last = in_8(&dev->dr); + nbr_read++; + } + if ((last & 0x01) != 0x01) + ret = -2; + if ((last != 0xff) || (nbr_read > 1)) + printf("[INFO] i2c abort after %d bytes (0x%02x)\n", + nbr_read, last); + udelay(DELAY_ABORT_SEQ); + out_8(&dev->cr, (I2C_CR_MEN)); + udelay(DELAY_ABORT_SEQ); + /* clear status reg */ + out_8(&dev->sr, 0); + + for (i = 0; i < 5; i++) + i2c_write_start_seq(); + if (ret != 0) + printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", + nbr_read, last); + + return ret; +} |