diff options
author | Roshni Shah <shah.roshni@yahoo.com> | 2011-03-14 06:49:42 -0400 |
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committer | Justin Waters <justin.waters@timesys.com> | 2012-03-02 16:59:46 -0500 |
commit | 2731b2eadeaa141e6f305fa8086106608112bbaa (patch) | |
tree | 2702d45bac84073cd580ccb1bd3eafb9a000d3b6 /drivers/w1/slaves/w1_ds2438.h | |
parent | 6d23f5084c975be637f7d748db82116bf84d3872 (diff) |
Add support for the i.MX53 QSB2.6.35.3-mx53-early-201103141049
This patch seems to have originated from the 11.01.00 release
from Freescale, which is no longer available except through the
gitweb interface from Freescale.
http://opensource.freescale.com/git?p=imx/linux-2.6-imx.git;a=commit;h=27fdf7bae11978d21e8aba09bb635f49b07edd4a
Diffstat (limited to 'drivers/w1/slaves/w1_ds2438.h')
-rw-r--r-- | drivers/w1/slaves/w1_ds2438.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/w1/slaves/w1_ds2438.h b/drivers/w1/slaves/w1_ds2438.h new file mode 100644 index 000000000000..b9fb73cafea4 --- /dev/null +++ b/drivers/w1/slaves/w1_ds2438.h @@ -0,0 +1,125 @@ +/* + * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __W1_DS2438_H__ +#define __W1_DS2438_H__ + +#include <asm/types.h> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/device.h> +#include <linux/types.h> + +#define DS2438_DEV_NAME "ds2438-battery" + +#define DS2438_PAGE_SIZE 8 +#define DS2438_PAGE_NUM 8 + +#define DS2438_CONVERT_TEMP 0x44 +#define DS2438_CONVERT_VOLT 0xB4 +#define DS2438_WRITE_SCRATCHPAD 0x4E +#define DS2438_COPY_SCRATCHPAD 0x48 +#define DS2438_RECALL_MEMORY 0xB8 + +enum DS2438_PAGE { + PAGE0_CONTROL = 0, + PAGE1_ETM, + PAGE2_STAMP, + PAGE3_RESV3, + PAGE4_RESV4, + PAGE5_RESV5, + PAGE6_RESV6, + PAGE7_CCA, +}; + +enum DS2438_REG { + /* PAGE 0 */ + PAGE0_STAT_CTRL = 0, + PAGE0_TEMP_LSB = 1, + PAGE0_TEMP_MSB = 2, + PAGE0_VOLTAGE_LSB = 3, + PAGE0_VOLTAGE_MSB = 4, + PAGE0_CURRENT_LSB = 5, + PAGE0_CURRENT_MSB = 6, + PAGE0_THRESHOLD = 7, + + /* PAGE 1 */ + PAGE1_ETM_BYTE0 = 0, + PAGE1_ETM_BYTE1 = 1, + PAGE1_ETM_BYTE2 = 2, + PAGE1_ETM_BYTE3 = 3, + PAGE1_ICA = 4, + PAGE1_OFFSET_LSB = 5, + PAGE1_OFFSET_MSB = 6, + + /* PAGE 2 */ + PAGE2_DISCONNECT_BYTE0 = 0, + PAGE2_DISCONNECT_BYTE1 = 1, + PAGE2_DISCONNECT_BYTE2 = 2, + PAGE2_DISCONNECT_BYTE3 = 3, + PAGE2_END_CHARGE_BYTE0 = 4, + PAGE2_END_CHARGE_BYTE1 = 5, + PAGE2_END_CHARGE_BYTE2 = 6, + PAGE2_END_CHARGE_BYTE3 = 7, + + /* PAGE 3 */ + /* PAGE 4 */ + /* PAGE 5 */ + /* PAGE 6 */ + /* PAGE 7 */ + PAGE7_CCA_LSB = 4, + PAGE7_CCA_MSB = 5, + PAGE7_DCA_LSB = 6, + PAGE7_DCA_MSB = 7, +}; + +#define DS2438_CTRL_IAD (1 << 0) +#define DS2438_CTRL_CA (1 << 1) +#define DS2438_CTRL_EE (1 << 2) +#define DS2438_CTRL_AD (1 << 3) +#define DS2438_STAT_TB (1 << 4) +#define DS2438_STAT_NVB (1 << 5) +#define DS2438_STAT_ADB (1 << 6) + +struct ds2438_ops { + int (*read_page) (struct device *, u8, u8 *); + int (*read_byte) (struct device *, u8, u8, u8 *); + int (*read_halfword) (struct device *, u8, u8, u16 *); + int (*read_word) (struct device *, u8, u8, u32 *); + int (*write_page) (struct device *, u8, u8 *); + int (*write_byte) (struct device *, u8, u8, u8); + int (*write_halfword) (struct device *, u8, u8, u16); + int (*write_word) (struct device *, u8, u8, u32); + int (*drain_sram) (struct device *, u8); + int (*load_sram) (struct device *, u8); + int (*command) (struct device *, u8, u8); +}; + +static inline u16 ds2438_readw(u8 *raw) +{ + return ((*(raw + 1)) << 8) | (*raw); +} + +static inline void ds2438_writew(u8 *raw, u16 data) +{ + *raw++ = data & 0xFF; + *raw = (data >> 8) & 0xFF; +} + +extern int w1_ds2438_read_page(struct device *dev, u8 page, u8 *buf); +extern int w1_ds2438_write_page(struct device *dev, u8 page, u8 *buf); +extern int w1_ds2438_command(struct device *dev, u8 command, u8 data); +extern int w1_ds2438_drain_sram(struct device *dev, u8 page); +extern int w1_ds2438_load_sram(struct device *dev, u8 page); +#endif /* __W1_DS2438_H__ */ |