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author | Wolfram Sang <w.sang@pengutronix.de> | 2009-01-26 20:19:54 (GMT) |
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committer | Jean Delvare <khali@linux-fr.org> | 2009-01-26 20:19:54 (GMT) |
commit | 0eb6da20681db9b5d5769d3e1aca877f4a77d8fb (patch) | |
tree | da9541a1df5ec189af37a5cb22b548534ed8c064 /drivers/misc/eeprom_93cx6.c | |
parent | e51d565ff6bb1cedc10568425511badf0633a212 (diff) | |
download | linux-0eb6da20681db9b5d5769d3e1aca877f4a77d8fb.tar.xz |
eeprom: Move 93cx6 eeprom driver to /drivers/misc/eeprom
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/misc/eeprom_93cx6.c')
-rw-r--r-- | drivers/misc/eeprom_93cx6.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c deleted file mode 100644 index 15b1780..0000000 --- a/drivers/misc/eeprom_93cx6.c +++ /dev/null @@ -1,240 +0,0 @@ -/* - Copyright (C) 2004 - 2006 rt2x00 SourceForge Project - <http://rt2x00.serialmonkey.com> - - 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. - */ - -/* - Module: eeprom_93cx6 - Abstract: EEPROM reader routines for 93cx6 chipsets. - Supported chipsets: 93c46 & 93c66. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/eeprom_93cx6.h> - -MODULE_AUTHOR("http://rt2x00.serialmonkey.com"); -MODULE_VERSION("1.0"); -MODULE_DESCRIPTION("EEPROM 93cx6 chip driver"); -MODULE_LICENSE("GPL"); - -static inline void eeprom_93cx6_pulse_high(struct eeprom_93cx6 *eeprom) -{ - eeprom->reg_data_clock = 1; - eeprom->register_write(eeprom); - - /* - * Add a short delay for the pulse to work. - * According to the specifications the "maximum minimum" - * time should be 450ns. - */ - ndelay(450); -} - -static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) -{ - eeprom->reg_data_clock = 0; - eeprom->register_write(eeprom); - - /* - * Add a short delay for the pulse to work. - * According to the specifications the "maximum minimum" - * time should be 450ns. - */ - ndelay(450); -} - -static void eeprom_93cx6_startup(struct eeprom_93cx6 *eeprom) -{ - /* - * Clear all flags, and enable chip select. - */ - eeprom->register_read(eeprom); - eeprom->reg_data_in = 0; - eeprom->reg_data_out = 0; - eeprom->reg_data_clock = 0; - eeprom->reg_chip_select = 1; - eeprom->register_write(eeprom); - - /* - * kick a pulse. - */ - eeprom_93cx6_pulse_high(eeprom); - eeprom_93cx6_pulse_low(eeprom); -} - -static void eeprom_93cx6_cleanup(struct eeprom_93cx6 *eeprom) -{ - /* - * Clear chip_select and data_in flags. - */ - eeprom->register_read(eeprom); - eeprom->reg_data_in = 0; - eeprom->reg_chip_select = 0; - eeprom->register_write(eeprom); - - /* - * kick a pulse. - */ - eeprom_93cx6_pulse_high(eeprom); - eeprom_93cx6_pulse_low(eeprom); -} - -static void eeprom_93cx6_write_bits(struct eeprom_93cx6 *eeprom, - const u16 data, const u16 count) -{ - unsigned int i; - - eeprom->register_read(eeprom); - - /* - * Clear data flags. - */ - eeprom->reg_data_in = 0; - eeprom->reg_data_out = 0; - - /* - * Start writing all bits. - */ - for (i = count; i > 0; i--) { - /* - * Check if this bit needs to be set. - */ - eeprom->reg_data_in = !!(data & (1 << (i - 1))); - - /* - * Write the bit to the eeprom register. - */ - eeprom->register_write(eeprom); - - /* - * Kick a pulse. - */ - eeprom_93cx6_pulse_high(eeprom); - eeprom_93cx6_pulse_low(eeprom); - } - - eeprom->reg_data_in = 0; - eeprom->register_write(eeprom); -} - -static void eeprom_93cx6_read_bits(struct eeprom_93cx6 *eeprom, - u16 *data, const u16 count) -{ - unsigned int i; - u16 buf = 0; - - eeprom->register_read(eeprom); - - /* - * Clear data flags. - */ - eeprom->reg_data_in = 0; - eeprom->reg_data_out = 0; - - /* - * Start reading all bits. - */ - for (i = count; i > 0; i--) { - eeprom_93cx6_pulse_high(eeprom); - - eeprom->register_read(eeprom); - - /* - * Clear data_in flag. - */ - eeprom->reg_data_in = 0; - - /* - * Read if the bit has been set. - */ - if (eeprom->reg_data_out) - buf |= (1 << (i - 1)); - - eeprom_93cx6_pulse_low(eeprom); - } - - *data = buf; -} - -/** - * eeprom_93cx6_read - Read multiple words from eeprom - * @eeprom: Pointer to eeprom structure - * @word: Word index from where we should start reading - * @data: target pointer where the information will have to be stored - * - * This function will read the eeprom data as host-endian word - * into the given data pointer. - */ -void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom, const u8 word, - u16 *data) -{ - u16 command; - - /* - * Initialize the eeprom register - */ - eeprom_93cx6_startup(eeprom); - - /* - * Select the read opcode and the word to be read. - */ - command = (PCI_EEPROM_READ_OPCODE << eeprom->width) | word; - eeprom_93cx6_write_bits(eeprom, command, - PCI_EEPROM_WIDTH_OPCODE + eeprom->width); - - /* - * Read the requested 16 bits. - */ - eeprom_93cx6_read_bits(eeprom, data, 16); - - /* - * Cleanup eeprom register. - */ - eeprom_93cx6_cleanup(eeprom); -} -EXPORT_SYMBOL_GPL(eeprom_93cx6_read); - -/** - * eeprom_93cx6_multiread - Read multiple words from eeprom - * @eeprom: Pointer to eeprom structure - * @word: Word index from where we should start reading - * @data: target pointer where the information will have to be stored - * @words: Number of words that should be read. - * - * This function will read all requested words from the eeprom, - * this is done by calling eeprom_93cx6_read() multiple times. - * But with the additional change that while the eeprom_93cx6_read - * will return host ordered bytes, this method will return little - * endian words. - */ -void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom, const u8 word, - __le16 *data, const u16 words) -{ - unsigned int i; - u16 tmp; - - for (i = 0; i < words; i++) { - tmp = 0; - eeprom_93cx6_read(eeprom, word + i, &tmp); - data[i] = cpu_to_le16(tmp); - } -} -EXPORT_SYMBOL_GPL(eeprom_93cx6_multiread); - |