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Viewing changes to arch/powerpc/kernel/udbg_16550.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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arch/powerpc/kernel/udbg_16550.c
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/*
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 * udbg for NS16550 compatable serial ports
 
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 * udbg for NS16550 compatible serial ports
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 *
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 * Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
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 *
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#include <linux/types.h>
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#include <asm/udbg.h>
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#include <asm/io.h>
 
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#include <asm/reg_a2.h>
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extern u8 real_readb(volatile u8 __iomem  *addr);
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extern void real_writeb(u8 data, volatile u8 __iomem *addr);
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        udbg_getc_poll = NULL;
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}
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#endif /* CONFIG_PPC_EARLY_DEBUG_40x */
 
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#ifdef CONFIG_PPC_EARLY_DEBUG_WSP
 
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static void udbg_wsp_flush(void)
 
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{
 
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        if (udbg_comport) {
 
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                while ((readb(&udbg_comport->lsr) & LSR_THRE) == 0)
 
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                        /* wait for idle */;
 
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        }
 
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}
 
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static void udbg_wsp_putc(char c)
 
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{
 
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        if (udbg_comport) {
 
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                if (c == '\n')
 
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                        udbg_wsp_putc('\r');
 
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                udbg_wsp_flush();
 
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                writeb(c, &udbg_comport->thr); eieio();
 
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        }
 
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}
 
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static int udbg_wsp_getc(void)
 
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{
 
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        if (udbg_comport) {
 
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                while ((readb(&udbg_comport->lsr) & LSR_DR) == 0)
 
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                        ; /* wait for char */
 
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                return readb(&udbg_comport->rbr);
 
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        }
 
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        return -1;
 
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}
 
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static int udbg_wsp_getc_poll(void)
 
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{
 
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        if (udbg_comport)
 
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                if (readb(&udbg_comport->lsr) & LSR_DR)
 
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                        return readb(&udbg_comport->rbr);
 
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        return -1;
 
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}
 
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void __init udbg_init_wsp(void)
 
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{
 
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        udbg_comport = (struct NS16550 __iomem *)WSP_UART_VIRT;
 
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        udbg_init_uart(udbg_comport, 57600, 50000000);
 
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        udbg_putc = udbg_wsp_putc;
 
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        udbg_flush = udbg_wsp_flush;
 
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        udbg_getc = udbg_wsp_getc;
 
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        udbg_getc_poll = udbg_wsp_getc_poll;
 
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}
 
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#endif /* CONFIG_PPC_EARLY_DEBUG_WSP */