diff options
Diffstat (limited to 'drivers/tty/serial/earlycon-riscv-sbi.c')
| -rw-r--r-- | drivers/tty/serial/earlycon-riscv-sbi.c | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/drivers/tty/serial/earlycon-riscv-sbi.c b/drivers/tty/serial/earlycon-riscv-sbi.c index e1a551aae336..0162155f0c83 100644 --- a/drivers/tty/serial/earlycon-riscv-sbi.c +++ b/drivers/tty/serial/earlycon-riscv-sbi.c @@ -10,19 +10,43 @@ #include <linux/serial_core.h> #include <asm/sbi.h> -static void sbi_console_write(struct console *con, - const char *s, unsigned int n) +static void sbi_putc(struct uart_port *port, unsigned char c) { - int i; + sbi_console_putchar(c); +} + +static void sbi_0_1_console_write(struct console *con, + const char *s, unsigned int n) +{ + struct earlycon_device *dev = con->data; + uart_console_write(&dev->port, s, n, sbi_putc); +} - for (i = 0; i < n; ++i) - sbi_console_putchar(s[i]); +static void sbi_dbcn_console_write(struct console *con, + const char *s, unsigned int n) +{ + int ret; + + while (n) { + ret = sbi_debug_console_write(s, n); + if (ret < 0) + break; + + s += ret; + n -= ret; + } } static int __init early_sbi_setup(struct earlycon_device *device, const char *opt) { - device->con->write = sbi_console_write; + if (sbi_debug_console_available) + device->con->write = sbi_dbcn_console_write; + else if (IS_ENABLED(CONFIG_RISCV_SBI_V01)) + device->con->write = sbi_0_1_console_write; + else + return -ENODEV; + return 0; } EARLYCON_DECLARE(sbi, early_sbi_setup); |