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Diffstat (limited to 'firmware/microblaze/lib/hal_io.h')
| -rw-r--r-- | firmware/microblaze/lib/hal_io.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/firmware/microblaze/lib/hal_io.h b/firmware/microblaze/lib/hal_io.h new file mode 100644 index 000000000..f8ec617f8 --- /dev/null +++ b/firmware/microblaze/lib/hal_io.h @@ -0,0 +1,166 @@ +/* -*- c++ -*- */ +/* + * Copyright 2007 Free Software Foundation, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef INCLUDED_HAL_IO_H +#define INCLUDED_HAL_IO_H + +#include "memory_map.h" + +void hal_io_init(void); +void hal_finish(); + + +/* + * ------------------------------------------------------------------------ + * The GPIO pins are organized into two banks of 16-bits. + * Bank 0 goes to the Tx daughterboard, Bank 1 goes to the Rx daughterboard. + * + * Each pin may be configured as an input or an output from the FPGA. + * For output pins, there are four signals which may be routed to the + * pin. The four signals are the value written by s/w, the output of + * the ATR controller, or two different sources of debug info from the + * FPGA fabric. + * ------------------------------------------------------------------------ + */ + +#define GPIO_TX_BANK 0 // pins that connect to the Tx daughterboard +#define GPIO_RX_BANK 1 // pins that connect to the Rx daughterboard + + +/*! + * \brief Set the data direction for GPIO pins + * + * If the bit is set, it's an output from the FPGA. + * \param value is a 16-bit bitmask of values + * \param mask is a 16-bit bitmask of which bits to effect. + */ +void hal_gpio_set_ddr(int bank, int value, int mask); + +/*! + * \brief Select the source of the signal for an output pin. + * + * \param code is is one of 's', 'a', '0', '1' + * where 's' selects software output, 'a' selects ATR output, '0' selects + * debug 0, '1' selects debug 1. + */ +void hal_gpio_set_sel(int bank, int bitno, char code); + +/*! + * \brief Select the source of the signal for the output pins. + * + * \param codes is is a string of 16 characters composed of '.', 's', + * 'a', '0', or '1' where '.' means "don't change", 's' selects + * software output, 'a' selects ATR output, '0' selects debug 0, '1' + * selects debug 1. + */ +void hal_gpio_set_sels(int bank, char *codes); + + +/*! + * \brief write \p value to gpio pins specified by \p mask. + */ +void hal_gpio_write(int bank, int value, int mask); + +/*! + * \brief read GPIO bits + */ +int hal_gpio_read(int bank); + + +/* + * ------------------------------------------------------------------------ + * control the leds + * + * Low 4-bits are the general purpose leds on the board + * The next bit is the led on the ethernet connector + * ------------------------------------------------------------------------ + */ + +void hal_set_leds(int value, int mask); +void hal_set_led_src(int value, int mask); +void hal_toggle_leds(int mask); + +/* + * ------------------------------------------------------------------------ + * simple timeouts + * ------------------------------------------------------------------------ + */ + + + +static inline void +hal_set_timeout(int delta_ticks) +{ + sr_simple_timer->onetime = delta_ticks; +} + +/* + * ------------------------------------------------------------------------ + * interrupt enable/disable + * ------------------------------------------------------------------------ + */ + +/*! + * \brief Disable interrupts and return previous interrupt enable state. + * [Microblaze specific] + */ +static inline int +hal_disable_ints(void) +{ + int result, t0; + + asm volatile("mfs %0, rmsr \n\ + andni %1, %0, 0x2 \n\ + mts rmsr, %1" + : "=r" (result), "=r" (t0)); + return result; +} + +/*! + * \brief Enable interrupts and return previous interrupt enable state. + * [Microblaze specific] + */ +static inline int +hal_enable_ints(void) +{ + int result, t0; + + asm volatile("mfs %0, rmsr \n\ + ori %1, %0, 0x2 \n\ + mts rmsr, %1" + : "=r" (result), "=r" (t0)); + return result; +} + +/*! + * \brief Set interrupt enable state to \p prev_state. + * [Microblaze specific] + */ +static inline void +hal_restore_ints(int prev_state) +{ + int t0, t1; + asm volatile("andi %0, %2, 0x2 \n\ + mfs %1, rmsr \n\ + andni %1, %1, 0x2 \n\ + or %1, %1, %0 \n\ + mts rmsr, %1" + : "=r" (t0), "=r"(t1) : "r" (prev_state)); +} + +#endif /* INCLUDED_HAL_IO_H */ |