diff options
Diffstat (limited to 'arch/cris/arch-v32/kernel/io.c')
| -rw-r--r-- | arch/cris/arch-v32/kernel/io.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/cris/arch-v32/kernel/io.c b/arch/cris/arch-v32/kernel/io.c new file mode 100644 index 000000000000..6bc9f263c3d6 --- /dev/null +++ b/arch/cris/arch-v32/kernel/io.c @@ -0,0 +1,154 @@ +/* + * Helper functions for I/O pins. + * + * Copyright (c) 2004 Axis Communications AB. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/ctype.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <asm/io.h> +#include <asm/arch/pinmux.h> +#include <asm/arch/hwregs/gio_defs.h> + +struct crisv32_ioport crisv32_ioports[] = +{ + { + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pa_oe), + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pa_dout), + (unsigned long*)REG_ADDR(gio, regi_gio, r_pa_din), + 8 + }, + { + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pb_oe), + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pb_dout), + (unsigned long*)REG_ADDR(gio, regi_gio, r_pb_din), + 18 + }, + { + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pc_oe), + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pc_dout), + (unsigned long*)REG_ADDR(gio, regi_gio, r_pc_din), + 18 + }, + { + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pd_oe), + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pd_dout), + (unsigned long*)REG_ADDR(gio, regi_gio, r_pd_din), + 18 + }, + { + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pe_oe), + (unsigned long*)REG_ADDR(gio, regi_gio, rw_pe_dout), + (unsigned long*)REG_ADDR(gio, regi_gio, r_pe_din), + 18 + } +}; + +#define NBR_OF_PORTS sizeof(crisv32_ioports)/sizeof(struct crisv32_ioport) + +struct crisv32_iopin crisv32_led1_green; +struct crisv32_iopin crisv32_led1_red; +struct crisv32_iopin crisv32_led2_green; +struct crisv32_iopin crisv32_led2_red; +struct crisv32_iopin crisv32_led3_green; +struct crisv32_iopin crisv32_led3_red; + +/* Dummy port used when green LED and red LED is on the same bit */ +static unsigned long io_dummy; +static struct crisv32_ioport dummy_port = +{ + &io_dummy, + &io_dummy, + &io_dummy, + 18 +}; +static struct crisv32_iopin dummy_led = +{ + &dummy_port, + 0 +}; + +static int __init crisv32_io_init(void) +{ + int ret = 0; + /* Initialize LEDs */ + ret += crisv32_io_get_name(&crisv32_led1_green, CONFIG_ETRAX_LED1G); + ret += crisv32_io_get_name(&crisv32_led1_red, CONFIG_ETRAX_LED1R); + ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_LED2G); + ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_LED2R); + ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_LED3G); + ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_LED3R); + crisv32_io_set_dir(&crisv32_led1_green, crisv32_io_dir_out); + crisv32_io_set_dir(&crisv32_led1_red, crisv32_io_dir_out); + crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out); + crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out); + crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out); + crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out); + + if (!strcmp(CONFIG_ETRAX_LED1G, CONFIG_ETRAX_LED1R)) + crisv32_led1_red = dummy_led; + if (!strcmp(CONFIG_ETRAX_LED2G, CONFIG_ETRAX_LED2R)) + crisv32_led2_red = dummy_led; + + return ret; +} + +__initcall(crisv32_io_init); + +int crisv32_io_get(struct crisv32_iopin* iopin, + unsigned int port, unsigned int pin) +{ + if (port > NBR_OF_PORTS) + return -EINVAL; + if (port > crisv32_ioports[port].pin_count) + return -EINVAL; + + iopin->bit = 1 << pin; + iopin->port = &crisv32_ioports[port]; + + if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio)) + return -EIO; + + return 0; +} + +int crisv32_io_get_name(struct crisv32_iopin* iopin, + char* name) +{ + int port; + int pin; + + if (toupper(*name) == 'P') + name++; + + if (toupper(*name) < 'A' || toupper(*name) > 'E') + return -EINVAL; + + port = toupper(*name) - 'A'; + name++; + pin = simple_strtoul(name, NULL, 10); + + if (pin < 0 || pin > crisv32_ioports[port].pin_count) + return -EINVAL; + + iopin->bit = 1 << pin; + iopin->port = &crisv32_ioports[port]; + + if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio)) + return -EIO; + + return 0; +} + +#ifdef CONFIG_PCI +/* PCI I/O access stuff */ +struct cris_io_operations* cris_iops = NULL; +EXPORT_SYMBOL(cris_iops); +#endif + |