Mikael Starvik | 51533b6 | 2005-07-27 11:44:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Helper functions for I/O pins. |
| 3 | * |
| 4 | * Copyright (c) 2004 Axis Communications AB. |
| 5 | */ |
| 6 | |
Mikael Starvik | 51533b6 | 2005-07-27 11:44:44 -0700 | [diff] [blame] | 7 | #include <linux/types.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/string.h> |
| 11 | #include <linux/ctype.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <asm/io.h> |
| 15 | #include <asm/arch/pinmux.h> |
| 16 | #include <asm/arch/hwregs/gio_defs.h> |
| 17 | |
| 18 | struct crisv32_ioport crisv32_ioports[] = |
| 19 | { |
| 20 | { |
| 21 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pa_oe), |
| 22 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pa_dout), |
| 23 | (unsigned long*)REG_ADDR(gio, regi_gio, r_pa_din), |
| 24 | 8 |
| 25 | }, |
| 26 | { |
| 27 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pb_oe), |
| 28 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pb_dout), |
| 29 | (unsigned long*)REG_ADDR(gio, regi_gio, r_pb_din), |
| 30 | 18 |
| 31 | }, |
| 32 | { |
| 33 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pc_oe), |
| 34 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pc_dout), |
| 35 | (unsigned long*)REG_ADDR(gio, regi_gio, r_pc_din), |
| 36 | 18 |
| 37 | }, |
| 38 | { |
| 39 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pd_oe), |
| 40 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pd_dout), |
| 41 | (unsigned long*)REG_ADDR(gio, regi_gio, r_pd_din), |
| 42 | 18 |
| 43 | }, |
| 44 | { |
| 45 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pe_oe), |
| 46 | (unsigned long*)REG_ADDR(gio, regi_gio, rw_pe_dout), |
| 47 | (unsigned long*)REG_ADDR(gio, regi_gio, r_pe_din), |
| 48 | 18 |
| 49 | } |
| 50 | }; |
| 51 | |
| 52 | #define NBR_OF_PORTS sizeof(crisv32_ioports)/sizeof(struct crisv32_ioport) |
| 53 | |
| 54 | struct crisv32_iopin crisv32_led1_green; |
| 55 | struct crisv32_iopin crisv32_led1_red; |
| 56 | struct crisv32_iopin crisv32_led2_green; |
| 57 | struct crisv32_iopin crisv32_led2_red; |
| 58 | struct crisv32_iopin crisv32_led3_green; |
| 59 | struct crisv32_iopin crisv32_led3_red; |
| 60 | |
| 61 | /* Dummy port used when green LED and red LED is on the same bit */ |
| 62 | static unsigned long io_dummy; |
| 63 | static struct crisv32_ioport dummy_port = |
| 64 | { |
| 65 | &io_dummy, |
| 66 | &io_dummy, |
| 67 | &io_dummy, |
| 68 | 18 |
| 69 | }; |
| 70 | static struct crisv32_iopin dummy_led = |
| 71 | { |
| 72 | &dummy_port, |
| 73 | 0 |
| 74 | }; |
| 75 | |
| 76 | static int __init crisv32_io_init(void) |
| 77 | { |
| 78 | int ret = 0; |
| 79 | /* Initialize LEDs */ |
| 80 | ret += crisv32_io_get_name(&crisv32_led1_green, CONFIG_ETRAX_LED1G); |
| 81 | ret += crisv32_io_get_name(&crisv32_led1_red, CONFIG_ETRAX_LED1R); |
| 82 | ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_LED2G); |
| 83 | ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_LED2R); |
| 84 | ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_LED3G); |
| 85 | ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_LED3R); |
| 86 | crisv32_io_set_dir(&crisv32_led1_green, crisv32_io_dir_out); |
| 87 | crisv32_io_set_dir(&crisv32_led1_red, crisv32_io_dir_out); |
| 88 | crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out); |
| 89 | crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out); |
| 90 | crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out); |
| 91 | crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out); |
| 92 | |
| 93 | if (!strcmp(CONFIG_ETRAX_LED1G, CONFIG_ETRAX_LED1R)) |
| 94 | crisv32_led1_red = dummy_led; |
| 95 | if (!strcmp(CONFIG_ETRAX_LED2G, CONFIG_ETRAX_LED2R)) |
| 96 | crisv32_led2_red = dummy_led; |
| 97 | |
| 98 | return ret; |
| 99 | } |
| 100 | |
| 101 | __initcall(crisv32_io_init); |
| 102 | |
| 103 | int crisv32_io_get(struct crisv32_iopin* iopin, |
| 104 | unsigned int port, unsigned int pin) |
| 105 | { |
| 106 | if (port > NBR_OF_PORTS) |
| 107 | return -EINVAL; |
| 108 | if (port > crisv32_ioports[port].pin_count) |
| 109 | return -EINVAL; |
| 110 | |
| 111 | iopin->bit = 1 << pin; |
| 112 | iopin->port = &crisv32_ioports[port]; |
| 113 | |
| 114 | if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio)) |
| 115 | return -EIO; |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | int crisv32_io_get_name(struct crisv32_iopin* iopin, |
| 121 | char* name) |
| 122 | { |
| 123 | int port; |
| 124 | int pin; |
| 125 | |
| 126 | if (toupper(*name) == 'P') |
| 127 | name++; |
| 128 | |
| 129 | if (toupper(*name) < 'A' || toupper(*name) > 'E') |
| 130 | return -EINVAL; |
| 131 | |
| 132 | port = toupper(*name) - 'A'; |
| 133 | name++; |
| 134 | pin = simple_strtoul(name, NULL, 10); |
| 135 | |
| 136 | if (pin < 0 || pin > crisv32_ioports[port].pin_count) |
| 137 | return -EINVAL; |
| 138 | |
| 139 | iopin->bit = 1 << pin; |
| 140 | iopin->port = &crisv32_ioports[port]; |
| 141 | |
| 142 | if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio)) |
| 143 | return -EIO; |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | #ifdef CONFIG_PCI |
| 149 | /* PCI I/O access stuff */ |
| 150 | struct cris_io_operations* cris_iops = NULL; |
| 151 | EXPORT_SYMBOL(cris_iops); |
| 152 | #endif |
| 153 | |