diff options
Diffstat (limited to 'pio.c')
| -rw-r--r-- | pio.c | 232 |
1 files changed, 167 insertions, 65 deletions
@@ -6,6 +6,7 @@ #include <stdint.h> #include <string.h> #include <unistd.h> +#include <stdlib.h> #include <endian.h> @@ -14,48 +15,6 @@ #define errf(...) fprintf(stderr, __VA_ARGS__) -static inline int _read(int fd, char *buf, size_t l) -{ - ssize_t rc = 0; - while (l > 0) { - rc = read(fd, buf, l); - if (rc >= 0) - break; - else if (rc < 0 && errno != EINTR) { - errf("read: %s\n", strerror(errno)); - break; - } - } - - return rc; -} - -static int read_fixed_stdin(char *buf, size_t wanted) -{ - ssize_t rc; - char eof; - - while (wanted > 0) { - rc = _read(0, buf, wanted); - if (rc > 0) { - wanted -= rc; - buf += rc; - } else if (rc == 0) { - errf("read: input too small\n"); - goto fail; - } else if (rc < 0) { - goto fail; - } - } - - if (_read(0, &eof, 1) == 0) - return 1; - - errf("read: input too large\n"); -fail: - return 0; -} - struct pio_status { int mul_sel; int pull; @@ -67,6 +26,7 @@ struct pio_status { #define PIO_REG_DLEVEL(B, N, I) ((B) + (N)*0x24 + ((I)<<2) + 0x14) #define PIO_REG_PULL(B, N, I) ((B) + (N)*0x24 + ((I)<<2) + 0x1C) #define PIO_REG_DATA(B, N) ((B) + (N)*0x24 + 0x10) +#define PIO_NR_PORTS 9 /* A-I */ #define LE32TOH(X) le32toh(*((uint32_t*)(X))) @@ -157,47 +117,189 @@ static int pio_set(char *buf, uint32_t port, uint32_t port_num, struct pio_statu return 1; } +static void pio_print(int port, int port_nr, struct pio_status *pio) +{ + printf("P%c%d", 'A'+port, port_nr); + printf("<%x>", pio->mul_sel); + printf("<%x>", pio->pull); + printf("<%x>", pio->drv_level); + if (pio->data >= 0) + printf("<%x>", pio->data); + fputc('\n', stdout); +} + static void print(const char *buf) { int port, i; struct pio_status pio; - for (port=0; port < 10 /*PIO_REG_SIZE/0x24*/; port++) { - for (i=0; i<28; i++) { + for (port=0; port < PIO_NR_PORTS; port++) { + for (i=0; i<32; i++) { if (pio_get(buf, port, i, &pio)) { - printf("P%c%d", 'A'+port, i+1); - printf("<%x>", pio.mul_sel); - printf("<%x>", pio.pull); - printf("<%x>", pio.drv_level); - if (pio.data >= 0) - printf("<%x>", pio.data); - - fputc('\n', stdout); + pio_print(port, i, &pio); } } } } -static int read_and_print(void) + +static const char *argv0; + +static void usage(int rc ) { - char buf[PIO_REG_SIZE]; + fprintf(stderr, "usage: %s -i input [-o output] pin..\n", argv0); + fprintf(stderr, " print Show all pins\n"); + fprintf(stderr, " Pxx Show pin\n"); + fprintf(stderr, " Pxx<mode><pull><drive><data>\n Configure pin\n"); + fprintf(stderr, " clean Clean input pins\n"); + fprintf(stderr, "\n mode 0-7, 0=input, 1=ouput, 2-7 I/O\n"); + fprintf(stderr, " pull 0=none, 1=up, 2=down\n"); + fprintf(stderr, " drive 0-3, I/O drive level\n"); + + exit(rc); +} - if (read_fixed_stdin(buf, PIO_REG_SIZE)) { - print(buf); - return 0; +static void parse_pin(int *port, int *pin, const char *name) +{ + if (*name == 'P') name++; + *port = *name++ - 'A'; + *pin = atoi(name); +} + +static void cmd_show_pin(char *buf, const char *pin) +{ + int port, port_nr; + struct pio_status pio; + parse_pin(&port, &port_nr, pin); + if (!pio_get(buf, port, port_nr, &pio)) + usage(1); + pio_print(port, port_nr, &pio); +} + +static void cmd_set_pin(char *buf, const char *pin) +{ + int port, port_nr; + const char *t = pin; + struct pio_status pio; + parse_pin(&port, &port_nr, pin); + if (!pio_get(buf, port, port_nr, &pio)) + usage(1); + t = strchr(t, '<'); + if (t) { + t++; + if (*t && *t != '>') + pio.mul_sel = atoi(t); + } + t = strchr(t, '<'); + if (t) { + t++; + if (*t && *t != '>') + pio.pull = atoi(t); + } + t = strchr(t, '<'); + if (t) { + t++; + if (*t && *t != '>') + pio.drv_level = atoi(t); + } + t = strchr(t, '<'); + if (t) { + t++; + if (*t && *t != '>') + pio.data = atoi(t); + } + pio_set(buf, port, port_nr, &pio); +} + +static void cmd_clean(char *buf) +{ + int port, i; + struct pio_status pio; + for (port=0; port < PIO_NR_PORTS; port++) { + for (i=0; i<32; i++) { + if (pio_get(buf, port, i, &pio)) { + if (pio.mul_sel == 0) { + pio.data = 0; + pio_set(buf, port, i, &pio); + } + } + } } - return -1; } -static inline int usage(const char *argv0) +static int do_command(char *buf, const char **args, int argc) { - fprintf(stderr, "usage: %s print < PIO\n", argv0); + const char *command = args[0]; + if (strchr(command, '<')) + cmd_set_pin(buf, command); + else if (*command == 'P') + cmd_show_pin(buf, command); + else if (strcmp(command, "print") == 0) + print(buf); + else if (strcmp(command, "clean") == 0) + cmd_clean(buf); + else usage(1); return 1; } int main(int argc, char **argv) { - if (argc == 2 && (strncmp("print", argv[1], 5) == 0)) - return read_and_print(); - else - return usage(argv[0]); -} + int opt; + FILE *in = NULL; + FILE *out = NULL; + const char *in_name = NULL; + const char *out_name = NULL; + char buf[PIO_REG_SIZE]; + + argv0 = argv[0]; + while ((opt = getopt(argc, argv, "i:o:")) != -1) { + switch(opt) { + case '?': + usage(0); + case 'i': + in_name = optarg; + break; + case 'o': + out_name = optarg; + break; + } + } + if (!in_name) + usage(1); + if (in_name) { + if (strcmp(in_name, "-") == 0) { + in = stdin; + } else { + in = fopen(in_name, "rb"); + if (!in) { + perror("open input"); + exit(1); + } + } + } + if (fread(buf, sizeof(buf), 1, in) != 1) { + perror("read input"); + exit(1); + } + if (in != stdin) + fclose(in); + + while(optind < argc) { + optind += do_command(buf, (const char **)(argv + optind), argc - optind); + } + + if (out_name) { + if (strcmp(out_name, "-") == 0) { + out = stdout; + } else { + out = fopen(out_name, "wb"); + if (!out) { + perror("open output"); + exit(1); + } + } + if (fwrite(buf, sizeof(buf), 1, out) != 1) { + perror("write output"); + exit(1); + } + } +} |