cfe_console.c

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#include <linux/init.h>
#include <linux/errno.h>
#include <linux/console.h>

#include <asm/sibyte/board.h>

#include <asm/fw/cfe/cfe_api.h>
#include <asm/fw/cfe/cfe_error.h>

extern int cfe_cons_handle;

static void cfe_console_write(struct console *cons, const char *str,
               unsigned int count)
{
    int i, last, written;

    for (i=0, last=0; i<count; i++) {
        if (!str[i])
            /* XXXKW can/should this ever happen? */
            return;
        if (str[i] == '\n') {
            do {
                written = cfe_write(cfe_cons_handle, &str[last], i-last);
                if (written < 0)
                    ;
                last += written;
            } while (last < i);
            while (cfe_write(cfe_cons_handle, "\r", 1) <= 0)
                ;
        }
    }
    if (last != count) {
        do {
            written = cfe_write(cfe_cons_handle, &str[last], count-last);
            if (written < 0)
                ;
            last += written;
        } while (last < count);
    }

}

static int cfe_console_setup(struct console *cons, char *str)
{
    char consdev[32];
    /* XXXKW think about interaction with 'console=' cmdline arg */
    /* If none of the console options are configured, the build will break. */
    if (cfe_getenv("BOOT_CONSOLE", consdev, 32) >= 0) {
#ifdef CONFIG_SERIAL_SB1250_DUART
        if (!strcmp(consdev, "uart0")) {
            setleds("u0cn");
        } else if (!strcmp(consdev, "uart1")) {
            setleds("u1cn");
        } else
#endif
#ifdef CONFIG_VGA_CONSOLE
               if (!strcmp(consdev, "pcconsole0")) {
                setleds("pccn");
        } else
#endif
            return -ENODEV;
    }
    return 0;
}

static struct console sb1250_cfe_cons = {
    .name       = "cfe",
    .write      = cfe_console_write,
    .setup      = cfe_console_setup,
    .flags      = CON_PRINTBUFFER,
    .index      = -1,
};

static int __init sb1250_cfe_console_init(void)
{
    register_console(&sb1250_cfe_cons);
    return 0;
}

console_initcall(sb1250_cfe_console_init);