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yaml --- r: 67448 b: refs/heads/master c: 7ddc5f9 h: refs/heads/master v: v3
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Grant Likely
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Josh Boyer
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Oct 3, 2007
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refs/heads/master: 340ffd267c85fc28da7cfd681b177c816af800cf | ||
refs/heads/master: 7ddc5f978b16c024b6c1fcecbda6815d3d3222ef |
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/* | ||
* Xilinx UARTLITE bootloader driver | ||
* | ||
* Copyright (C) 2007 Secret Lab Technologies Ltd. | ||
* | ||
* This file is licensed under the terms of the GNU General Public License | ||
* version 2. This program is licensed "as is" without any warranty of any | ||
* kind, whether express or implied. | ||
*/ | ||
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#include <stdarg.h> | ||
#include <stddef.h> | ||
#include "types.h" | ||
#include "string.h" | ||
#include "stdio.h" | ||
#include "io.h" | ||
#include "ops.h" | ||
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static void * reg_base; | ||
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static int uartlite_open(void) | ||
{ | ||
/* Clear the RX FIFO */ | ||
out_be32(reg_base + 0x0C, 0x2); | ||
return 0; | ||
} | ||
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static void uartlite_putc(unsigned char c) | ||
{ | ||
while ((in_be32(reg_base + 0x8) & 0x08) != 0); /* spin */ | ||
out_be32(reg_base + 0x4, c); | ||
} | ||
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static unsigned char uartlite_getc(void) | ||
{ | ||
while ((in_be32(reg_base + 0x8) & 0x01) == 0); /* spin */ | ||
return in_be32(reg_base); | ||
} | ||
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static u8 uartlite_tstc(void) | ||
{ | ||
return ((in_be32(reg_base + 0x8) & 0x01) != 0); | ||
} | ||
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int uartlite_console_init(void *devp, struct serial_console_data *scdp) | ||
{ | ||
int n; | ||
unsigned long reg_phys; | ||
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n = getprop(devp, "virtual-reg", ®_base, sizeof(reg_base)); | ||
if (n != sizeof(reg_base)) { | ||
if (!dt_xlate_reg(devp, 0, ®_phys, NULL)) | ||
return -1; | ||
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reg_base = (void *)reg_phys; | ||
} | ||
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scdp->open = uartlite_open; | ||
scdp->putc = uartlite_putc; | ||
scdp->getc = uartlite_getc; | ||
scdp->tstc = uartlite_tstc; | ||
scdp->close = NULL; | ||
return 0; | ||
} |