75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
#undef DEBUG
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#include <common.h>
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#include <asm/gpio.h>
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#include <asm/arch/mux.h>
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#include "shield.h"
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#include "board.h"
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#define MAX_SHIELDS 16
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static struct shield_t *shields[MAX_SHIELDS];
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static int shield_count = 0;
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/* Perhaps this function shouldn't leave in shields.c? */
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int shield_gpio_request_as_input(unsigned int gpio, const char *label)
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{
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int ret;
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ret = gpio_request(gpio, label);
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if ((ret < 0)) {
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printf("Could not request shield slot %s gpio\n", label);
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return -1;
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}
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ret = gpio_direction_input(gpio);
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if ((ret < 0)) {
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printf("Could not configure shield slot %s gpio as input\n", label);
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return -1;
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}
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return 0;
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}
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void shield_register(struct shield_t *shield)
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{
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if (shield_count >= MAX_SHIELDS) {
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printf("Max shield count reached (%d), please increment MAX_SHIELDS\n", MAX_SHIELDS);
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return;
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}
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shields[shield_count++] = shield;
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}
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int shield_set_mode(const char* shield_type, int argc, char * const argv[])
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{
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int i;
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for (i = 0; i < shield_count; i++) {
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if (strcmp(shield_type, shields[i]->name) == 0) {
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return shields[i]->setmode(argv, argc);
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}
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}
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printf("## Error: No %s shield installed\n", shield_type);
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/* Do not return error, to not show usage (request by rs) */
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return 0;
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}
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static int do_shieldmode(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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if (argc < 2) {
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return -1;
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}
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return shield_set_mode(argv[1], argc - 2, &argv[2]);
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}
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U_BOOT_CMD(
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shield, 6, 1, do_shieldmode,
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"Set the shield mode",
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"dualcan termination [on|off] [on|off]\n"
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"shield dualcan-passive\n"
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"shield comio mode [rs232|rs485] termination [on|off]\n"
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);
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