mvme3100/flash/flashcfg.c

0001 /* BSP-specific bits of flash programmer support */
0002
0003 /*
0004  * Authorship
0005  * ----------
0006  * This software ('mvme3100' RTEMS BSP) was created by
0007  *
0008  *     Till Straumann <strauman@slac.stanford.edu>, 2005-2007,
0009  *     Stanford Linear Accelerator Center, Stanford University.
0010  *
0011  * Acknowledgement of sponsorship
0012  * ------------------------------
0013  * The 'mvme3100' BSP was produced by
0014  *     the Stanford Linear Accelerator Center, Stanford University,
0015  *     under Contract DE-AC03-76SFO0515 with the Department of Energy.
0016  *
0017  * Government disclaimer of liability
0018  * ----------------------------------
0019  * Neither the United States nor the United States Department of Energy,
0020  * nor any of their employees, makes any warranty, express or implied, or
0021  * assumes any legal liability or responsibility for the accuracy,
0022  * completeness, or usefulness of any data, apparatus, product, or process
0023  * disclosed, or represents that its use would not infringe privately owned
0024  * rights.
0025  *
0026  * Stanford disclaimer of liability
0027  * --------------------------------
0028  * Stanford University makes no representations or warranties, express or
0029  * implied, nor assumes any liability for the use of this software.
0030  *
0031  * Stanford disclaimer of copyright
0032  * --------------------------------
0033  * Stanford University, owner of the copyright, hereby disclaims its
0034  * copyright and all other rights in this software.  Hence, anyone may
0035  * freely use it for any purpose without restriction.
0036  *
0037  * Maintenance of notices
0038  * ----------------------
0039  * In the interest of clarity regarding the origin and status of this
0040  * SLAC software, this and all the preceding Stanford University notices
0041  * are to remain affixed to any copy or derivative of this software made
0042  * or distributed by the recipient and are to be affixed to any copy of
0043  * software made or distributed by the recipient that contains a copy or
0044  * derivative of this software.
0045  *
0046  * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
0047  */
0048 #include <rtems.h>
0049 #include <bsp.h>
0050 #include <libcpu/spr.h>
0051 #include <stdio.h>
0052
0053 #include <bsp/flashPgmPvt.h>
0054
0055 SPR_RO(TBRL)
0056
0057 #define STATIC  static
0058
0059 static struct bankdesc mvme3100Flash[] = {
0060     /*
0061      * Bank is populated from the top; make max_size negative to
0062      * indicate this
0063      */
0064     { 0xf8000000, 0, - 0x08000000, 2, BSP_flash_vendor_spansion, 0, 0, 0  },
0065 };
0066
0067 STATIC struct bankdesc *
0068 bankcheck(int bank, int quiet)
0069 {
0070     if ( bank ) {
0071         if ( !quiet )
0072             fprintf(stderr,"Invalid flash bank #%i\n",bank);
0073         return 0;
0074     }
0075     return &mvme3100Flash[bank];
0076 }
0077
0078 STATIC int
0079 flash_wp(int bank, int enbl)
0080 {
0081 uint8_t mask = enbl < 0 ? 0 : BSP_MVME3100_FLASH_CSR_F_WP_SW;
0082 uint8_t val;
0083
0084     if ( bank != 0 ) {
0085         fprintf(stderr,"Invalid flash bank #%i\n",bank);
0086         return -1;
0087     }
0088
0089     if ( enbl )
0090         val = BSP_setSysReg( BSP_MVME3100_FLASH_CSR, mask );
0091     else
0092         val = BSP_clrSysReg( BSP_MVME3100_FLASH_CSR, mask );
0093
0094     if ( BSP_MVME3100_FLASH_CSR_F_WP_HW & val ) {
0095         fprintf(stderr,"Flash: hardware write-protection engaged (switch)\n");
0096         return -1;
0097     }
0098     if ( enbl < 0 )
0099         return val & (BSP_MVME3100_FLASH_CSR_F_WP_HW | BSP_MVME3100_FLASH_CSR_F_WP_SW );
0100     return 0;
0101 }
0102
0103 STATIC uint32_t
0104 read_us_timer(void)
0105 {
0106 uint32_t mhz = BSP_bus_frequency/BSP_time_base_divisor/1000;
0107
0108     return _read_TBRL()/mhz;
0109 }
0110
0111 /* BSP ops (detect banks, handle write-protection on board) */
0112 struct flash_bsp_ops BSP_flashBspOps = {
0113     bankcheck:     bankcheck,
0114     flash_wp:      flash_wp,
0115     read_us_timer: read_us_timer,
0116 };