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Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen5200/nvram/nvram.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/gen5200/nvram/nvram.c | 603 |
1 files changed, 0 insertions, 603 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen5200/nvram/nvram.c b/c/src/lib/libbsp/powerpc/gen5200/nvram/nvram.c deleted file mode 100644 index 99192ac3c4..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/nvram/nvram.c +++ /dev/null @@ -1,603 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MPC5200 BSP | -+-----------------------------------------------------------------+ -| Partially based on the code references which are named below. | -| Adaptions, modifications, enhancements and any recent parts of | -| the code are: | -| Copyright (c) 2005 | -| Embedded Brains GmbH | -| Obere Lagerstr. 30 | -| D-82178 Puchheim | -| Germany | -| rtems@embedded-brains.de | -+-----------------------------------------------------------------+ -| The license and distribution terms for this file may be | -| found in the file LICENSE in this distribution or at | -| | -| http://www.rtems.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| this file contains the nvram functions | -\*===============================================================*/ -/***********************************************************************/ -/* */ -/* Module: nvram.c */ -/* Date: 07/17/2003 */ -/* Purpose: RTEMS M93C64-based NV memory device driver */ -/* */ -/*---------------------------------------------------------------------*/ -/* */ -/* Description: M93C46 is a serial microwire EEPROM which contains */ -/* 1Kbit (128 bytes/64 words) of non-volatile memory. */ -/* The device can be coigured for byte- or word- */ -/* access. The driver provides a file-like interface */ -/* to this memory. */ -/* */ -/* MPC5x00 PIN settings: */ -/* */ -/* PSC3_6 (output) -> MC93C46 serial data in (D) */ -/* PSC3_7 (input) -> MC93C46 serial data out (Q) */ -/* PSC3_8 (output) -> MC93C46 chip select input (S) */ -/* PSC3_9 (output) -> MC93C46 serial clock (C) */ -/* */ -/*---------------------------------------------------------------------*/ -/* */ -/* Code */ -/* References: DS1307-based Non-Volatile memory device driver */ -/* Module: nvram.c */ -/* Project: RTEMS 4.6.0pre1 / MCF5206Elite BSP */ -/* Version 1.2 */ -/* Date: 11/04/2002 */ -/* Author: Victor V. Vengerov */ -/* Copyright: Copyright (C) 2000 OKTET Ltd.,St.-Petersburg,Russia */ -/* */ -/* The license and distribution terms for this file may be */ -/* found in the file LICENSE in this distribution or at */ -/* http://www.rtems.org/license/LICENSE. */ -/* */ -/*---------------------------------------------------------------------*/ -/* */ -/* Partially based on the code references which are named above. */ -/* Adaptions, modifications, enhancements and any recent parts of */ -/* the code are under the right of */ -/* */ -/* IPR Engineering, Dachauer Straße 38, D-80335 München */ -/* Copyright(C) 2003 */ -/* */ -/*---------------------------------------------------------------------*/ -/* */ -/* IPR Engineering makes no representation or warranties with */ -/* respect to the performance of this computer program, and */ -/* specifically disclaims any responsibility for any damages, */ -/* special or consequential, connected with the use of this program. */ -/* */ -/*---------------------------------------------------------------------*/ -/* */ -/* Version history: 1.0 */ -/* */ -/***********************************************************************/ - -#include <rtems.h> -#include <rtems/libio.h> -#include <errno.h> -#include <string.h> -#include <stdio.h> -#include <bsp.h> -#include <bsp/mpc5200.h> -#include <bsp/nvram.h> -#include "m93cxx.h" - -/* - * Simple usec delay function using lower half of HARPO Time Base Register - */ -void wait_usec(unsigned long usec) - { - unsigned long start_count = 0, update_count; - unsigned long delay_count; - - if(TMBASE_CLOCK < 1000000) - delay_count = (TMBASE_CLOCK * usec )/1000000; - else - delay_count = (TMBASE_CLOCK / 1000000) * usec; - - TBL_READ(start_count); - - update_count = start_count; - - while((update_count - start_count) < delay_count) - TBL_READ(update_count); - - } - - -/* - * Enable M93Cxx chip-write - */ -static void m93cxx_enable_write() - { - uint32_t header, i; - - ENABLE_CHIP_SELECT; - - WAIT(1); - - header = M93C46_EWEN; - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - DISABLE_CHIP_SELECT; - - return; - - } - - -/* - * Disable M93Cxx chip-write - */ -static void m93cxx_disable_write() - { - uint32_t header, i; - - ENABLE_CHIP_SELECT; - - WAIT(1); - - header = M93C46_EWDS; - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - DISABLE_CHIP_SELECT; - - return; - - } - - -/* - * Read one byte from specified offset - */ -static uint8_t m93cxx_read_byte(uint32_t offset) - { - uint8_t byte2read; - uint32_t header, tmp_offset, i; -#ifdef M93CXX_MODE_BYTE - uint8_t byte_recv = 0; -#else - uint32_t word_recv = 0; -#endif - - ENABLE_CHIP_SELECT; - - WAIT(1); - -#ifdef M93CXX_MODE_BYTE - - header = M93C46_READ(offset); - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - for(i = 0; i < 8; i++) - { - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - GET_DATA_BYTE_SHIFT(byte_recv); - - } - - byte_recv >>= 1; - - byte2read = byte_recv; - -#else - tmp_offset = offset/2; - - header = M93C46_READ(tmp_offset); - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - for(i = 0; i < 16; i++) - { - - DO_CLOCK_CYCLE; - - WAIT(1); - - GET_DATA_WORD_SHIFT(word_recv); - - WAIT(1); - - } - - word_recv >>= 1; - - if(offset%2) - { - - byte2read = (uint8_t)((word_recv & 0xFF00) >> 8); - -#ifdef NVRAM_DEBUG - printf("\nbyte_read(o) = %x", byte2read); -#endif - - } - else - { - - byte2read = (uint8_t)(word_recv & 0x00FF); - -#ifdef NVRAM_DEBUG - printf("\nbyte_read(e) = %x", byte2read); -#endif - } - -#endif - - WAIT(1); - - DISABLE_CHIP_SELECT; - - return byte2read; - - } - - -/* - * Write one byte to specified offset - */ -void m93cxx_write_byte(uint32_t offset, uint8_t byte2write) - { - uint32_t header, tmp_offset, i; -#ifdef M93CXX_MODE_BYTE - uint8_t byte_send; -#else - uint16_t word_send; -#endif - - ENABLE_CHIP_SELECT; - - WAIT(1); - -#ifdef M93CXX_MODE_BYTE - header = M93C46_WRITE(offset); - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - byte_send = byte2write; - - for(i = 0; i < 8; i++) - { - - SET_DATA_BYTE_SHIFT(byte_send); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - } -#else - - if(offset%2) - { - - word_send = (uint16_t)m93cxx_read_byte(offset-1); - word_send |= (uint16_t)(m93cxx_read_byte(offset) << 8); - - } - else - { - - word_send = (uint16_t)m93cxx_read_byte(offset); - word_send |= (uint16_t)(m93cxx_read_byte(offset + 1) << 8); - - } - - tmp_offset = offset/2; - - WAIT(1); - - ENABLE_CHIP_SELECT; - - WAIT(1); - - header = M93C46_WRITE(tmp_offset); - - for(i = 0; i < M93C46_CLOCK_CYCLES; i++) - { - - MASK_HEAD_SHIFT(header); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - if(offset%2) - { - - word_send = (word_send & 0x00FF) | ((uint16_t)(byte2write << 8)); - -#ifdef NVRAM_DEBUG - printf("\nword_send = %x", word_send); -#endif - - } - else - { - - word_send = (word_send & 0xFF00) | (uint16_t)byte2write; -#ifdef NVRAM_DEBUG - printf("\nword_send = %x", word_send); -#endif - - } - - for(i = 0; i < 16; i++) - { - - SET_DATA_WORD_SHIFT(word_send); - - WAIT(1); - - DO_CLOCK_CYCLE; - - WAIT(1); - - } - - DISABLE_CHIP_SELECT; - - WAIT(1); - - ENABLE_CHIP_SELECT; - - WAIT(1); - - CHECK_WRITE_BUSY; - -#endif - - WAIT(1); - - DISABLE_CHIP_SELECT; - - return; - - } - - -/* nvram_driver_initialize -- - * Non-volatile memory device driver initialization. - */ -rtems_device_driver nvram_driver_initialize(rtems_device_major_number major, rtems_device_minor_number minor, void *arg) - { - rtems_status_code sc; - - /* enable PSC3_6/PSC3_7 as general purpose pins */ - mpc5200.gpiosen |= (GPIO_PSC3_6 | GPIO_PSC3_7); - - /* PSC3_6/PSC3_7 has normal CMOS output */ - mpc5200.gpiosod &= ~(GPIO_PSC3_6 | GPIO_PSC3_7); - - /* switch PSC3_6 (MC93C46 serial data in (D)) to low */ - mpc5200.gpiosdo &= ~GPIO_PSC3_6; - - /* PSC3_6 is an output (MC93C46 serial data in (D)) and PSC3_7 (MC93C46 serial data out (Q)) is an input pin */ - mpc5200.gpiosdd |= GPIO_PSC3_6; - mpc5200.gpiosdd &= ~GPIO_PSC3_7; - - /* disable PSC3_8 interrupt capabilities */ - mpc5200.gpiosiie &= ~GPIO_PSC3_8; - - /* enable PSC3_8 as general purpose pin */ - mpc5200.gpiosie |= GPIO_PSC3_8; - - /* PSC3_8 has normal CMOS output */ - mpc5200.gpiosiod &= ~GPIO_PSC3_8; - - /* switch PSC3_8 (MC93C46 chip select input (S)) to low (high activ) */ - mpc5200.gpiosido &= ~GPIO_PSC3_8; - - /* PSC3_8 is an output (MC93C46 chip select input (S)) pin */ - mpc5200.gpiosidd |= GPIO_PSC3_8; - - /* disable PSC3_9 interrupt capabilities */ - mpc5200.gpiowue &= ~GPIO_PSC3_9; - - /* enable PSC3_9 as general purpose pins */ - mpc5200.gpiowe |= GPIO_PSC3_9; - - /* PSC3_9 has normal CMOS output */ - mpc5200.gpiowod &= ~GPIO_PSC3_9; - - /* switch PSC3_9 (MC93C46 serial clock (C)) to low */ - mpc5200.gpiowdo &= ~GPIO_PSC3_9; - - /* PSC3_9 is an output (MC93C46 serial clock (C)) pin */ - mpc5200.gpiowdd |= GPIO_PSC3_9; - - sc = rtems_io_register_name("/dev/nvram", major, 0); - - if(sc != RTEMS_SUCCESSFUL) - { - - errno = EIO; - /*errno = ENODEV;*/ - return RTEMS_UNSATISFIED; - - } - else - return RTEMS_SUCCESSFUL; - - } - - -/* nvram_driver_open -- - * Non-volatile memory device driver open primitive. - */ -rtems_device_driver nvram_driver_open(rtems_device_major_number major, rtems_device_minor_number minor, void *arg) - { - - return RTEMS_SUCCESSFUL; - - } - - -/* nvram_driver_close -- - * Non-volatile memory device driver close primitive. - */ -rtems_device_driver nvram_driver_close(rtems_device_major_number major, rtems_device_minor_number minor, void *arg) - { - - return RTEMS_SUCCESSFUL; - - } - - -/* nvram_driver_read -- - * Non-volatile memory device driver read primitive. - */ -rtems_device_driver nvram_driver_read(rtems_device_major_number major, rtems_device_minor_number minor, void *arg) - { - rtems_libio_rw_args_t *args = arg; - uint32_t count, i; - -#ifdef NVRAM_DEBUG - printf("\nread count = %2x", (int)(args->count)); - printf("\nread offset = %2x", (int)(args->offset)); -#endif - - if((args->offset >= M93C46_NVRAM_SIZE) || (args->offset + args->count > M93C46_NVRAM_SIZE)) - { - - args->bytes_moved = 0; - errno = EINVAL; - return RTEMS_UNSATISFIED; - - } - else - count = args->count; - - for(i = 0; i < count; i++) - { - - (args->buffer)[i] = m93cxx_read_byte((args->offset) + i); - (args->bytes_moved) += 1; - - } - - return RTEMS_SUCCESSFUL; - - } - - -/* nvram_driver_write -- - * Non-volatile memory device driver write primitive. - */ -rtems_device_driver nvram_driver_write(rtems_device_major_number major, rtems_device_minor_number minor, void *arg) - { - rtems_libio_rw_args_t *args = arg; - uint32_t count, i; - -#ifdef NVRAM_DEBUG - printf("\nwrite count = %2x", (int)(args->count)); - printf("\nwrite offset = %2x", (int)(args->offset)); -#endif - - if((args->offset >= M93C46_NVRAM_SIZE) || (args->offset + args->count > M93C46_NVRAM_SIZE)) - { - - args->bytes_moved = 0; - errno = EINVAL; - return RTEMS_UNSATISFIED; - - } - - count = args->count; - - m93cxx_enable_write(); - - WAIT(1); - - for(i = 0; i < count; i++) - { - - m93cxx_write_byte((args->offset) + i, (args->buffer)[i]); - (args->bytes_moved) += 1; - - } - - WAIT(1); - - m93cxx_disable_write(); - - return RTEMS_SUCCESSFUL; - - } |