2 * Copyright (c) 2016, GlobalLogic
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
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9 * this list of conditions and the following disclaimer.
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30 #include <drivers/scif.h>
32 #define SCIF_SCFSR (0x10)
33 #define SCIF_SCFTDR (0x0C)
34 #define SCIF_SCFCR (0x18)
35 #define SCIF_SCFDR (0x1C)
37 #define SCFSR_TDFE BIT(5)
38 #define SCFSR_TEND BIT(6)
40 #define SCFDR_T_SHIFT 8
42 #define SCIF_TX_FIFO_SIZE 16
44 void scif_uart_flush(vaddr_t base)
46 while (!(read16(base + SCIF_SCFSR) & SCFSR_TEND))
50 void scif_uart_init(vaddr_t base)
52 /* Bootloader should initialize device for us */
53 scif_uart_flush(base);
56 void scif_uart_putc(int ch, vaddr_t base)
58 /* Wait until there is space in the FIFO */
59 while ((read16(base + SCIF_SCFDR) >> SCFDR_T_SHIFT) >=
62 write8(ch, base + SCIF_SCFTDR);
63 write16(read16(base + SCIF_SCFSR) & ~(SCFSR_TEND | SCFSR_TDFE),