82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* Implements sys_padconf() for the AM335X and DM37XX. */
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#include "kernel/kernel.h"
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#include "arch_proto.h"
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#include <sys/types.h>
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#include <machine/cpu.h>
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#include <minix/mmio.h>
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#include <minix/padconf.h>
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#include <minix/board.h>
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#include <assert.h>
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#include <io.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "omap_padconf.h"
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struct omap_padconf
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{
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vir_bytes base;
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vir_bytes offset;
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vir_bytes size;
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unsigned int board_filter_value;
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unsigned int board_filter_mask;
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};
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static struct omap_padconf omap_padconfs[] = {
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{
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.base = PADCONF_DM37XX_REGISTERS_BASE,
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.offset = PADCONF_DM37XX_REGISTERS_OFFSET,
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.size = PADCONF_DM37XX_REGISTERS_SIZE,
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.board_filter_value = BOARD_FILTER_BBXM_VALUE,
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.board_filter_mask = BOARD_FILTER_BBXM_MASK,
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},
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{
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.base = PADCONF_AM335X_REGISTERS_BASE,
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.offset = PADCONF_AM335X_REGISTERS_OFFSET,
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.size = PADCONF_AM335X_REGISTERS_SIZE,
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.board_filter_value = BOARD_FILTER_BB_VALUE,
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.board_filter_mask = BOARD_FILTER_BB_MASK,
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},
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};
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/* initialized in init */
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static struct omap_padconf *omap_padconf;
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static kern_phys_map padconf_phys_map;
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int
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arch_padconf_set(u32_t padconf, u32_t mask, u32_t value)
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{
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/* check that the value will be inside the padconf memory range */
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if (padconf >= (omap_padconf->size - omap_padconf->offset)) {
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return EINVAL; /* outside of valid range */
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}
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set32(padconf + omap_padconf->base + omap_padconf->offset, mask, value);
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return OK;
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}
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void
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arch_padconf_init(void)
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{
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int x;
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omap_padconf = NULL;
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/* find the correct padconf */
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for (x =0 ; x < sizeof(omap_padconfs)/sizeof(omap_padconfs[0]) ; x++) {
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if ( (omap_padconfs[x].board_filter_mask & machine.board_id) == omap_padconfs[x].board_filter_value) {
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omap_padconf = &omap_padconfs[x];
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break;
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}
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}
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assert(omap_padconf);
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kern_phys_map_ptr(omap_padconf->base, omap_padconf->size,
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&padconf_phys_map, (vir_bytes) &omap_padconf->base);
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return;
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}
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