Rev 420 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 420 | giacomo | 1 | |
| 2 | /* |
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| 3 | * linux/drivers/i2c/i2c-frodo.c |
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| 4 | * |
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| 5 | * Author: Abraham van der Merwe <abraham@2d3d.co.za> |
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| 6 | * |
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| 7 | * An I2C adapter driver for the 2d3D, Inc. StrongARM SA-1110 |
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| 8 | * Development board (Frodo). |
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| 9 | * |
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| 10 | * This source code is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU General Public License |
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| 12 | * version 2 as published by the Free Software Foundation. |
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| 13 | */ |
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| 14 | |||
| 15 | #include <linux/module.h> |
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| 16 | #include <linux/kernel.h> |
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| 17 | #include <linux/init.h> |
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| 18 | #include <linux/delay.h> |
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| 19 | #include <linux/i2c.h> |
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| 20 | #include <linux/i2c-algo-bit.h> |
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| 21 | #include <asm/hardware.h> |
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| 22 | |||
| 23 | |||
| 24 | static void frodo_setsda (void *data,int state) |
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| 25 | { |
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| 26 | if (state) |
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| 27 | FRODO_CPLD_I2C |= FRODO_I2C_SDA_OUT; |
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| 28 | else |
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| 29 | FRODO_CPLD_I2C &= ~FRODO_I2C_SDA_OUT; |
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| 30 | } |
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| 31 | |||
| 32 | static void frodo_setscl (void *data,int state) |
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| 33 | { |
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| 34 | if (state) |
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| 35 | FRODO_CPLD_I2C |= FRODO_I2C_SCL_OUT; |
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| 36 | else |
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| 37 | FRODO_CPLD_I2C &= ~FRODO_I2C_SCL_OUT; |
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| 38 | } |
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| 39 | |||
| 40 | static int frodo_getsda (void *data) |
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| 41 | { |
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| 42 | return ((FRODO_CPLD_I2C & FRODO_I2C_SDA_IN) != 0); |
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| 43 | } |
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| 44 | |||
| 45 | static int frodo_getscl (void *data) |
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| 46 | { |
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| 47 | return ((FRODO_CPLD_I2C & FRODO_I2C_SCL_IN) != 0); |
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| 48 | } |
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| 49 | |||
| 50 | static struct i2c_algo_bit_data bit_frodo_data = { |
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| 51 | .setsda = frodo_setsda, |
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| 52 | .setscl = frodo_setscl, |
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| 53 | .getsda = frodo_getsda, |
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| 54 | .getscl = frodo_getscl, |
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| 55 | .udelay = 80, |
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| 56 | .mdelay = 80, |
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| 57 | .timeout = HZ |
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| 58 | }; |
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| 59 | |||
| 60 | static struct i2c_adapter frodo_ops = { |
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| 61 | .owner = THIS_MODULE, |
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| 62 | .id = I2C_HW_B_FRODO, |
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| 63 | .algo_data = &bit_frodo_data, |
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| 64 | .dev = { |
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| 65 | .name = "Frodo adapter driver", |
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| 66 | }, |
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| 67 | }; |
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| 68 | |||
| 69 | static int __init i2c_frodo_init (void) |
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| 70 | { |
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| 71 | return i2c_bit_add_bus(&frodo_ops); |
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| 72 | } |
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| 73 | |||
| 74 | static void __exit i2c_frodo_exit (void) |
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| 75 | { |
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| 76 | i2c_bit_del_bus(&frodo_ops); |
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| 77 | } |
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| 78 | |||
| 79 | MODULE_AUTHOR ("Abraham van der Merwe <abraham@2d3d.co.za>"); |
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| 80 | MODULE_DESCRIPTION ("I2C-Bus adapter routines for Frodo"); |
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| 81 | MODULE_LICENSE ("GPL"); |
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| 82 | |||
| 83 | module_init (i2c_frodo_init); |
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| 84 | module_exit (i2c_frodo_exit); |
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| 85 |