fb9c876148
In order to improve reliability, add a binary mode for interacting with the SPI chip. This lets us hook up flashrom. Signed-off-by: Sean Cross <xobs@kosagi.com>
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
#include <string.h>
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#include "bionic.h"
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#include "serial.h"
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#include "printf.h"
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#include "spi.h"
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static int do_flashrom(void)
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{
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uint8_t out_count;
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uint8_t in_count;
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uint8_t out[256];
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uint8_t in[256];
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serial_putc(0x05);
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(void)serial_getc(); // Dummy read, necessary for some reason
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while (1) {
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out_count = serial_getc();
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in_count = serial_getc();
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if ((!in_count) && (!out_count))
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return 0;
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serial_read(out, out_count);
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spi_cmd_txrx(out_count, in_count, out, in);
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serial_write(in, in_count);
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}
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}
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int cmd_spi(int argc, char **argv)
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{
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uint32_t recv_bytes_count;
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uint8_t xmit_bytes[argc - 1];
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int i;
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if (argc > 0 && !_strcasecmp(argv[0], "id")) {
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uint8_t out[1] = {0x9f};
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uint8_t in[3];
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spi_cmd_txrx(sizeof(out), sizeof(in), out, in);
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printf("ID: %02x %02x %02x\n", in[0], in[1], in[2]);
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return 0;
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}
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if (argc > 0 && !_strcasecmp(argv[0], "flashrom"))
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return do_flashrom();
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if (argc < 2) {
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printf("Send SPI bytes out and read the response.\n");
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printf("Usage:\n");
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printf(" spi [count] [byte 1] [byte 2] ...\n");
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printf(" Where \"count\" is the number of bytes to expect"
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" in response.\n");
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printf(" spi id get device id\n");
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printf(" spi flashrom enter 'flashrom' prog mode\n");
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return 1;
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}
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recv_bytes_count = strtoul(argv[0], NULL, 0);
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uint8_t recv_bytes[recv_bytes_count];
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for (i = 1; i < argc; i++)
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xmit_bytes[i - 1] = strtoul(argv[i], NULL, 0);
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printf("Transmitting %d bytes and expecting a response with %d bytes:\n",
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sizeof(xmit_bytes), sizeof(recv_bytes));
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serial_print_hex(xmit_bytes, sizeof(xmit_bytes));
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spi_cmd_txrx(sizeof(xmit_bytes), sizeof(recv_bytes),
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xmit_bytes, recv_bytes);
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printf("Response:\n");
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serial_print_hex(recv_bytes, sizeof(recv_bytes));
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return 0;
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}
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int cmd_spi_raw(int argc, char **argv)
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{
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uint32_t recv_bytes_count;
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uint8_t xmit_bytes[argc - 1];
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int i;
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if (argc < 2) {
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printf("Quietly send SPI bytes out and read the response.\n");
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printf("Usage:\n");
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printf(" spi_raw [count] [byte 1] [byte 2] ...\n");
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printf(" Where \"count\" is the number of bytes to expect"
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" in response.\n");
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return 1;
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}
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recv_bytes_count = strtoul(argv[0], NULL, 0);
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uint8_t recv_bytes[recv_bytes_count];
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for (i = 1; i < argc; i++)
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xmit_bytes[i - 1] = strtoul(argv[i], NULL, 16);
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spi_cmd_txrx(sizeof(xmit_bytes), sizeof(recv_bytes),
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xmit_bytes, recv_bytes);
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for (i = 0; i < recv_bytes_count; i++) {
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serial_puth(recv_bytes[i], 2);
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serial_puts(" ");
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}
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serial_puts("\n");
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return 0;
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}
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