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tools/lib/atben.c: check if the 8:10 slot is available and fail if it isn't
- atben.c (MMC_PATH, AT86RF230_PATH, find_file, slot_in_use): check if the MMC or AT86RF230 kernel driver uses the 8:10 card slot and print a detailed error message if it is - atben.c (atben_open): fail if the 8:10 card slot is busy
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@ -16,6 +16,8 @@
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <fnmatch.h>
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#include <sys/mman.h>
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#include "at86rf230.h"
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@ -38,6 +40,10 @@ enum {
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};
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#define MMC_PATH "/sys/bus/platform/drivers/jz4740-mmc"
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#define AT86RF230_PATH "/sys/bus/spi/drivers/at86rf230"
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#define SOC_BASE 0x10000000
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#define REG(n) (*(volatile uint32_t *) (dsc->mem+(n)))
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@ -184,10 +190,53 @@ static void atben_reset_rf(void *handle)
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}
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static int find_file(const char *path, const char *pattern)
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{
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DIR *dir;
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const struct dirent *de;
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dir = opendir(path);
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if (!dir)
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return 0;
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while ((de = readdir(dir)))
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if (!fnmatch(pattern, de->d_name, 0))
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break;
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if (closedir(dir) < 0) {
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perror("closedir");
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exit(1);
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}
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return !!de;
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}
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static int slot_in_use(void)
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{
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if (find_file(MMC_PATH, "*.0")) {
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fprintf(stderr,
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"The 8:10 card slot is currently used by the MMC controller.\n"
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"You can try to detach it with:\n"
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"# echo jz4740-mmc.0 >/sys/bus/platform/drivers/jz4740-mmc/unbind\n");
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return 1;
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}
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if (find_file(AT86RF230_PATH, "*.0")) {
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fprintf(stderr,
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"The 8:10 card slot is currently used by the AT86RF230 kernel driver.\n"
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"You can try to detach it with:\n"
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"# cd /sys/bus/spi/drivers/at86rf230\n"
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"# echo spi*.0 >unbind\n");
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return 1;
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}
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return 0;
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}
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static void *atben_open(const char *arg)
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{
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struct atben_dsc *dsc;
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if (slot_in_use())
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return NULL;
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dsc = malloc(sizeof(*dsc));
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if (!dsc) {
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perror("malloc");
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