diff options
| -rw-r--r-- | common/serial.c | 90 | ||||
| -rw-r--r-- | include/serial.h | 5 |
2 files changed, 95 insertions, 0 deletions
diff --git a/common/serial.c b/common/serial.c index bf7740950..748e5d5b1 100644 --- a/common/serial.c +++ b/common/serial.c @@ -24,6 +24,8 @@ #include <common.h> #include <serial.h> #include <stdio_dev.h> +#include <post.h> +#include <linux/compiler.h> DECLARE_GLOBAL_DATA_PTR; @@ -221,3 +223,91 @@ void serial_puts (const char *s) serial_current->puts (s); } + +#if CONFIG_POST & CONFIG_SYS_POST_UART +static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; + +/* Mark weak until post/cpu/.../uart.c migrate over */ +__weak +int uart_post_test(int flags) +{ + unsigned char c; + int ret, saved_baud, b; + struct serial_device *saved_dev, *s; + bd_t *bd = gd->bd; + + /* Save current serial state */ + ret = 0; + saved_dev = serial_current; + saved_baud = bd->bi_baudrate; + + for (s = serial_devices; s; s = s->next) { + /* If this driver doesn't support loop back, skip it */ + if (!s->loop) + continue; + + /* Test the next device */ + serial_current = s; + + ret = serial_init(); + if (ret) + goto done; + + /* Consume anything that happens to be queued */ + while (serial_tstc()) + serial_getc(); + + /* Enable loop back */ + s->loop(1); + + /* Test every available baud rate */ + for (b = 0; b < ARRAY_SIZE(bauds); ++b) { + bd->bi_baudrate = bauds[b]; + serial_setbrg(); + + /* + * Stick to printable chars to avoid issues: + * - terminal corruption + * - serial program reacting to sequences and sending + * back random extra data + * - most serial drivers add in extra chars (like \r\n) + */ + for (c = 0x20; c < 0x7f; ++c) { + /* Send it out */ + serial_putc(c); + + /* Make sure it's the same one */ + ret = (c != serial_getc()); + if (ret) { + s->loop(0); + goto done; + } + + /* Clean up the output in case it was sent */ + serial_putc('\b'); + ret = ('\b' != serial_getc()); + if (ret) { + s->loop(0); + goto done; + } + } + } + + /* Disable loop back */ + s->loop(0); + + /* XXX: There is no serial_uninit() !? */ + if (s->uninit) + s->uninit(); + } + + done: + /* Restore previous serial state */ + serial_current = saved_dev; + bd->bi_baudrate = saved_baud; + serial_reinit_all(); + serial_setbrg(); + + return ret; +} +#endif diff --git a/include/serial.h b/include/serial.h index e6d3859bd..08d106a7c 100644 --- a/include/serial.h +++ b/include/serial.h @@ -1,6 +1,8 @@ #ifndef __SERIAL_H__ #define __SERIAL_H__ +#include <post.h> + #define NAMESIZE 16 struct serial_device { @@ -13,6 +15,9 @@ struct serial_device { int (*tstc) (void); void (*putc) (const char c); void (*puts) (const char *s); +#if CONFIG_POST & CONFIG_SYS_POST_UART + void (*loop) (int); +#endif struct serial_device *next; }; |