diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.22/600-eeprom_93cx6.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.22/600-eeprom_93cx6.patch | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.22/600-eeprom_93cx6.patch b/target/linux/generic-2.6/patches-2.6.22/600-eeprom_93cx6.patch new file mode 100644 index 0000000000..e8bcd5acee --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.22/600-eeprom_93cx6.patch @@ -0,0 +1,474 @@ +From: Ivo van Doorn <ivdoorn@gmail.com> +Date: Fri, 11 May 2007 19:59:40 +0000 (-0400) +Subject: [PATCH] Add 93cx6 eeprom library +X-Git-Tag: v2.6.23-rc1~1201^2~74 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=9467d64b0e88763914c01f71ddf591b166c4f526 + +[PATCH] Add 93cx6 eeprom library + +This patch adds a library for reading from 93cx6 eeproms. + +Signed-off-by: Michael Wu <flamingice@sourmilk.net> +Signed-off-by: John W. Linville <linville@tuxdriver.com> +--- + +diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig +index 616eee9..bd601ef 100644 +--- a/drivers/misc/Kconfig ++++ b/drivers/misc/Kconfig +@@ -34,6 +34,11 @@ config PHANTOM + If you choose to build module, its name will be phantom. If unsure, + say N here. + ++config EEPROM_93CX6 ++ tristate "EEPROM 93CX6 support" ++ ---help--- ++ This is a driver for the EEPROM chipsets 93c46 and 93c66. ++ The driver supports both read as well as write commands. + + If unsure, say N. + +@@ -187,5 +192,4 @@ config THINKPAD_ACPI_BAY + + If you are not sure, say Y here. + +- + endmenu +diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile +index 8abbf2f..b5ce0e3 100644 +--- a/drivers/misc/Makefile ++++ b/drivers/misc/Makefile +@@ -14,3 +14,4 @@ obj-$(CONFIG_PHANTOM) += phantom.o + obj-$(CONFIG_SGI_IOC4) += ioc4.o + obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o + obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o ++obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +new file mode 100644 +index 0000000..bfcb434 +--- /dev/null ++++ b/drivers/misc/eeprom_93cx6.c +@@ -0,0 +1,229 @@ ++/* ++ 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/version.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); ++ udelay(1); ++} ++ ++static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) ++{ ++ eeprom->reg_data_clock = 0; ++ eeprom->register_write(eeprom); ++ udelay(1); ++} ++ ++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); ++ +diff --git a/include/linux/eeprom_93cx6.h b/include/linux/eeprom_93cx6.h +new file mode 100644 +index 0000000..d774b77 +--- /dev/null ++++ b/include/linux/eeprom_93cx6.h +@@ -0,0 +1,72 @@ ++/* ++ 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 datastructures for 93cx6 chipsets. ++ Supported chipsets: 93c46 & 93c66. ++ */ ++ ++/* ++ * EEPROM operation defines. ++ */ ++#define PCI_EEPROM_WIDTH_93C46 6 ++#define PCI_EEPROM_WIDTH_93C66 8 ++#define PCI_EEPROM_WIDTH_OPCODE 3 ++#define PCI_EEPROM_WRITE_OPCODE 0x05 ++#define PCI_EEPROM_READ_OPCODE 0x06 ++#define PCI_EEPROM_EWDS_OPCODE 0x10 ++#define PCI_EEPROM_EWEN_OPCODE 0x13 ++ ++/** ++ * struct eeprom_93cx6 - control structure for setting the commands ++ * for reading the eeprom data. ++ * @data: private pointer for the driver. ++ * @register_read(struct eeprom_93cx6 *eeprom): handler to ++ * read the eeprom register, this function should set all reg_* fields. ++ * @register_write(struct eeprom_93cx6 *eeprom): handler to ++ * write to the eeprom register by using all reg_* fields. ++ * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines ++ * @reg_data_in: register field to indicate data input ++ * @reg_data_out: register field to indicate data output ++ * @reg_data_clock: register field to set the data clock ++ * @reg_chip_select: register field to set the chip select ++ * ++ * This structure is used for the communication between the driver ++ * and the eeprom_93cx6 handlers for reading the eeprom. ++ */ ++struct eeprom_93cx6 { ++ void *data; ++ ++ void (*register_read)(struct eeprom_93cx6 *eeprom); ++ void (*register_write)(struct eeprom_93cx6 *eeprom); ++ ++ int width; ++ ++ char reg_data_in; ++ char reg_data_out; ++ char reg_data_clock; ++ char reg_chip_select; ++}; ++ ++extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom, ++ const u8 word, u16 *data); ++extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom, ++ const u8 word, __le16 *data, const u16 words); +From: Ivo van Doorn <ivdoorn@gmail.com> +Date: Mon, 14 May 2007 21:06:01 +0000 (+0200) +Subject: [PATCH] eeprom_93cx6: Add comment for 1us delay after pulse +X-Git-Tag: v2.6.23-rc1~1201^2~73 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=4b914dc0493edff19ff698a18198a173a14ba9d2 + +[PATCH] eeprom_93cx6: Add comment for 1us delay after pulse + +This will add a comment for the 1us delay which is taken +after the pulse has been switched. The 1us delay is based +on the specifications so that should be made clear. + +Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> +Signed-off-by: John W. Linville <linville@tuxdriver.com> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index bfcb434..0d6d742 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -39,6 +39,12 @@ 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 minimal time ++ * should be 450ns so a 1us delay is sufficient. ++ */ + udelay(1); + } + +@@ -46,6 +52,12 @@ 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 minimal time ++ * should be 450ns so a 1us delay is sufficient. ++ */ + udelay(1); + } + +From: John W. Linville <linville@tuxdriver.com> +Date: Tue, 12 Jun 2007 01:37:46 +0000 (-0400) +Subject: [PATCH] eeprom_93cx6: shorten pulse timing to match spec +X-Git-Tag: v2.6.23-rc1~1201^2~71 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=7e9400f178d291b2208c4ed9aac0f425c1364000 + +[PATCH] eeprom_93cx6: shorten pulse timing to match spec + +93cx6 datasheet available here: + + http://ww1.microchip.com/downloads/en/DeviceDoc/21749F.pdf + +Figure 1-1 and Table 1-2 on pages 4-5 indicate that both Clock High +Time and Clock Low Time have largest minimum times of 450ns. + +Signed-off-by: John W. Linville <linville@tuxdriver.com> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index 0d6d742..ac515b0 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -42,10 +42,10 @@ static inline void eeprom_93cx6_pulse_high(struct eeprom_93cx6 *eeprom) + + /* + * Add a short delay for the pulse to work. +- * According to the specifications the minimal time +- * should be 450ns so a 1us delay is sufficient. ++ * According to the specifications the "maximum minimum" ++ * time should be 450ns. + */ +- udelay(1); ++ ndelay(450); + } + + static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) +From: Francois Romieu <romieu@fr.zoreil.com> +Date: Tue, 3 Jul 2007 22:31:44 +0000 (+0200) +Subject: eeprom_93cx6: shorten pulse timing to match spec (bis) +X-Git-Tag: v2.6.23-rc1~1151^2~11 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=8abd531e3f77188de2fc41e677d075cc66e61631 + +eeprom_93cx6: shorten pulse timing to match spec (bis) + +Based on an original idea by John W. Linville. + +It is the missing part of 42d45ccd60636c28e35c2016f091783bc14ad99c + +Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> +Signed-off-by: Jeff Garzik <jeff@garzik.org> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index ac515b0..ea55654 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -55,10 +55,10 @@ static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) + + /* + * Add a short delay for the pulse to work. +- * According to the specifications the minimal time +- * should be 450ns so a 1us delay is sufficient. ++ * According to the specifications the "maximum minimum" ++ * time should be 450ns. + */ +- udelay(1); ++ ndelay(450); + } + + static void eeprom_93cx6_startup(struct eeprom_93cx6 *eeprom) |