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Based on 3 normalized pattern(s): 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
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*
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* Original author:
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* Ben Collins <bcollins@ubuntu.com>
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*
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* Additional work by:
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* John Brooks <john.brooks@bluecherry.net>
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*/
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include "solo6x10.h"
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/* Control */
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#define EE_SHIFT_CLK 0x04
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#define EE_CS 0x08
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#define EE_DATA_WRITE 0x02
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#define EE_DATA_READ 0x01
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#define EE_ENB (0x80 | EE_CS)
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#define eeprom_delay() udelay(100)
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#if 0
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#define eeprom_delay() solo_reg_read(solo_dev, SOLO_EEPROM_CTRL)
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#define eeprom_delay() ({ \
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int i, ret; \
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udelay(100); \
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for (i = ret = 0; i < 1000 && !ret; i++) \
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ret = solo_eeprom_reg_read(solo_dev); \
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})
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#endif
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#define ADDR_LEN 6
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/* Commands */
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#define EE_EWEN_CMD 4
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#define EE_EWDS_CMD 4
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#define EE_WRITE_CMD 5
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#define EE_READ_CMD 6
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#define EE_ERASE_CMD 7
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static unsigned int solo_eeprom_reg_read(struct solo_dev *solo_dev)
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{
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return solo_reg_read(solo_dev, SOLO_EEPROM_CTRL) & EE_DATA_READ;
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}
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static void solo_eeprom_reg_write(struct solo_dev *solo_dev, u32 data)
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{
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solo_reg_write(solo_dev, SOLO_EEPROM_CTRL, data);
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eeprom_delay();
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}
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static void solo_eeprom_cmd(struct solo_dev *solo_dev, int cmd)
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{
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int i;
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ACCESS_EN);
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
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for (i = 4 + ADDR_LEN; i >= 0; i--) {
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int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | dataval);
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
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EE_SHIFT_CLK | dataval);
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}
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
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}
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unsigned int solo_eeprom_ewen(struct solo_dev *solo_dev, int w_en)
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{
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int ewen_cmd = (w_en ? 0x3f : 0) | (EE_EWEN_CMD << ADDR_LEN);
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unsigned int retval = 0;
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int i;
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solo_eeprom_cmd(solo_dev, ewen_cmd);
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for (i = 0; i < 16; i++) {
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
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EE_SHIFT_CLK);
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retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
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retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
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}
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solo_eeprom_reg_write(solo_dev, ~EE_CS);
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retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
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return retval;
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}
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__be16 solo_eeprom_read(struct solo_dev *solo_dev, int loc)
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{
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int read_cmd = loc | (EE_READ_CMD << ADDR_LEN);
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u16 retval = 0;
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int i;
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solo_eeprom_cmd(solo_dev, read_cmd);
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for (i = 0; i < 16; i++) {
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
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EE_SHIFT_CLK);
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retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
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solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
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}
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solo_eeprom_reg_write(solo_dev, ~EE_CS);
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return (__force __be16)retval;
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}
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int solo_eeprom_write(struct solo_dev *solo_dev, int loc,
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__be16 data)
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{
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int write_cmd = loc | (EE_WRITE_CMD << ADDR_LEN);
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unsigned int retval;
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int i;
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solo_eeprom_cmd(solo_dev, write_cmd);
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for (i = 15; i >= 0; i--) {
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unsigned int dataval = ((__force unsigned)data >> i) & 1;
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solo_eeprom_reg_write(solo_dev, EE_ENB);
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solo_eeprom_reg_write(solo_dev,
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EE_ENB | (dataval << 1) | EE_SHIFT_CLK);
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}
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solo_eeprom_reg_write(solo_dev, EE_ENB);
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solo_eeprom_reg_write(solo_dev, ~EE_CS);
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solo_eeprom_reg_write(solo_dev, EE_ENB);
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for (i = retval = 0; i < 10000 && !retval; i++)
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retval = solo_eeprom_reg_read(solo_dev);
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solo_eeprom_reg_write(solo_dev, ~EE_CS);
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return !retval;
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}
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