diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/serial/serial_arc.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/serial/serial_arc.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/qemu/roms/u-boot/drivers/serial/serial_arc.c b/qemu/roms/u-boot/drivers/serial/serial_arc.c deleted file mode 100644 index 2ddbf32a5..000000000 --- a/qemu/roms/u-boot/drivers/serial/serial_arc.c +++ /dev/null @@ -1,115 +0,0 @@ -/* - * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <common.h> -#include <serial.h> - -DECLARE_GLOBAL_DATA_PTR; - -struct arc_serial_regs { - unsigned int id0; - unsigned int id1; - unsigned int id2; - unsigned int id3; - unsigned int data; - unsigned int status; - unsigned int baudl; - unsigned int baudh; -}; - -/* Bit definitions of STATUS register */ -#define UART_RXEMPTY (1 << 5) -#define UART_OVERFLOW_ERR (1 << 1) -#define UART_TXEMPTY (1 << 7) - -struct arc_serial_regs *regs; - -static void arc_serial_setbrg(void) -{ - int arc_console_baud; - - if (!gd->baudrate) - gd->baudrate = CONFIG_BAUDRATE; - - arc_console_baud = gd->cpu_clk / (gd->baudrate * 4) - 1; - writeb(arc_console_baud & 0xff, ®s->baudl); - -#ifdef CONFIG_ARC - /* - * UART ISS(Instruction Set simulator) emulation has a subtle bug: - * A existing value of Baudh = 0 is used as a indication to startup - * it's internal state machine. - * Thus if baudh is set to 0, 2 times, it chokes. - * This happens with BAUD=115200 and the formaula above - * Until that is fixed, when running on ISS, we will set baudh to !0 - */ - if (gd->arch.running_on_hw) - writeb((arc_console_baud & 0xff00) >> 8, ®s->baudh); - else - writeb(1, ®s->baudh); -#else - writeb((arc_console_baud & 0xff00) >> 8, ®s->baudh); -#endif -} - -static int arc_serial_init(void) -{ - regs = (struct arc_serial_regs *)CONFIG_ARC_UART_BASE; - serial_setbrg(); - return 0; -} - -static void arc_serial_putc(const char c) -{ - if (c == '\n') - arc_serial_putc('\r'); - - while (!(readb(®s->status) & UART_TXEMPTY)) - ; - - writeb(c, ®s->data); -} - -static int arc_serial_tstc(void) -{ - return !(readb(®s->status) & UART_RXEMPTY); -} - -static int arc_serial_getc(void) -{ - while (!arc_serial_tstc()) - ; - - /* Check for overflow errors */ - if (readb(®s->status) & UART_OVERFLOW_ERR) - return 0; - - return readb(®s->data) & 0xFF; -} - -static struct serial_device arc_serial_drv = { - .name = "arc_serial", - .start = arc_serial_init, - .stop = NULL, - .setbrg = arc_serial_setbrg, - .putc = arc_serial_putc, - .puts = default_serial_puts, - .getc = arc_serial_getc, - .tstc = arc_serial_tstc, -}; - -void arc_serial_initialize(void) -{ - serial_register(&arc_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &arc_serial_drv; -} |