The common code should be valid for more than one architecture. Therefore this code was reorganized and moved to the new file km83xx_i2c.c Signed-off-by: Holger Brunck <holger.brunck@keymile.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com>master
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/*
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* (C) Copyright 2011 |
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* Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <i2c.h> |
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#include <asm/io.h> |
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#include <linux/ctype.h> |
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#include "../common/common.h" |
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|
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static void i2c_write_start_seq(void) |
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{ |
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struct fsl_i2c *dev; |
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dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); |
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udelay(DELAY_ABORT_SEQ); |
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out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); |
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udelay(DELAY_ABORT_SEQ); |
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out_8(&dev->cr, (I2C_CR_MEN)); |
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} |
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int i2c_make_abort(void) |
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{ |
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struct fsl_i2c *dev; |
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dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); |
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uchar dummy; |
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uchar last; |
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int nbr_read = 0; |
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int i = 0; |
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int ret = 0; |
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/* wait after each operation to finsh with a delay */ |
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out_8(&dev->cr, (I2C_CR_MSTA)); |
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udelay(DELAY_ABORT_SEQ); |
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out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); |
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udelay(DELAY_ABORT_SEQ); |
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dummy = in_8(&dev->dr); |
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udelay(DELAY_ABORT_SEQ); |
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last = in_8(&dev->dr); |
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nbr_read++; |
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/*
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* do read until the last bit is 1, but stop if the full eeprom is |
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* read. |
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*/ |
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while (((last & 0x01) != 0x01) && |
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(nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { |
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udelay(DELAY_ABORT_SEQ); |
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last = in_8(&dev->dr); |
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nbr_read++; |
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} |
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if ((last & 0x01) != 0x01) |
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ret = -2; |
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if ((last != 0xff) || (nbr_read > 1)) |
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printf("[INFO] i2c abort after %d bytes (0x%02x)\n", |
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nbr_read, last); |
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udelay(DELAY_ABORT_SEQ); |
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out_8(&dev->cr, (I2C_CR_MEN)); |
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udelay(DELAY_ABORT_SEQ); |
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/* clear status reg */ |
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out_8(&dev->sr, 0); |
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for (i = 0; i < 5; i++) |
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i2c_write_start_seq(); |
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if (ret != 0) |
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printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", |
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nbr_read, last); |
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return ret; |
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} |
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