Hardware Design: SIE
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| 1 | /* |
| 2 | JZ47xx GPIO at userspace |
| 3 | |
| 4 | Copyright (C) 2010 Andres Calderon andres.calderon@emqbit.com |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <unistd.h> |
| 23 | |
| 24 | #include <jz47xx_gpio.h> |
| 25 | #include <jz47xx_mmap.h> |
| 26 | |
| 27 | |
| 28 | #define JZ_GPIO_BASE 0x10010000 |
| 29 | |
| 30 | int |
| 31 | jz_gpio_as_output (JZ_PIO * pio, unsigned int o) |
| 32 | { |
| 33 | pio->PXFUNC = (1 << (o)); |
| 34 | pio->PXSELC = (1 << (o)); |
| 35 | pio->PXDIRS = (1 << (o)); |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | void |
| 40 | jz_gpio_as_input (JZ_PIO * pio, unsigned int o) |
| 41 | { |
| 42 | pio->PXFUNC = (1 << (o)); |
| 43 | pio->PXSELC = (1 << (o)); |
| 44 | pio->PXDIRC = (1 << (o)); |
| 45 | } |
| 46 | |
| 47 | void |
| 48 | jz_gpio_as_irq (JZ_PIO * pio, unsigned int o) |
| 49 | { |
| 50 | pio->PXFUNC = (1 << (o)); |
| 51 | pio->PXSELS = (1 << (o)); |
| 52 | pio->PXDIRC = (1 << (o)); |
| 53 | } |
| 54 | |
| 55 | int |
| 56 | jz_gpio_set_pin (JZ_PIO * pio, unsigned int o) |
| 57 | { |
| 58 | pio->PXDATS = (1 << (o)); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | int |
| 63 | jz_gpio_clear_pin (JZ_PIO * pio, unsigned int o) |
| 64 | { |
| 65 | pio->PXDATC = (1 << (o)); |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | void |
| 70 | jz_gpio_out (JZ_PIO * pio, unsigned int o, unsigned int val) |
| 71 | { |
| 72 | if (val == 0) |
| 73 | pio->PXDATC = (1 << (o)); |
| 74 | else |
| 75 | pio->PXDATS = (1 << (o)); |
| 76 | } |
| 77 | |
| 78 | unsigned int |
| 79 | jz_gpio_get_pin (JZ_PIO * pio, unsigned int o) |
| 80 | { |
| 81 | return (pio->PXPIN & (1 << o)) ? 1 : 0; |
| 82 | } |
| 83 | |
| 84 | int |
| 85 | jz_gpio_as_func (JZ_PIO * pio, unsigned int o, int func) |
| 86 | { |
| 87 | switch (func) |
| 88 | { |
| 89 | case 0: |
| 90 | pio->PXFUNS = (1 << o); |
| 91 | pio->PXTRGC = (1 << o); |
| 92 | pio->PXSELC = (1 << o); |
| 93 | pio->PXPES = (1 << o); |
| 94 | return 1; |
| 95 | |
| 96 | case 1: |
| 97 | pio->PXFUNS = (1 << o); |
| 98 | pio->PXTRGC = (1 << o); |
| 99 | pio->PXSELS = (1 << o); |
| 100 | pio->PXPES = (1 << o); |
| 101 | return 1; |
| 102 | |
| 103 | case 2: |
| 104 | pio->PXFUNS = (1 << o); |
| 105 | pio->PXTRGS = (1 << o); |
| 106 | pio->PXSELC = (1 << o); |
| 107 | pio->PXPES = (1 << o); |
| 108 | return 1; |
| 109 | } |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | JZ_PIO * |
| 114 | jz_gpio_map (int port) |
| 115 | { |
| 116 | JZ_PIO *pio; |
| 117 | |
| 118 | pio = (JZ_PIO *) jz_mmap (JZ_GPIO_BASE); |
| 119 | pio = (JZ_PIO *) ((unsigned int) pio + port * 0x100); |
| 120 | |
| 121 | return pio; |
| 122 | } |
| 123 |
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