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uncompress.h

/*
 * arch/arm/plat-omap/include/mach/uncompress.h
 *
 * Serial port stubs for kernel decompress status messages
 *
 * Initially based on:
 * linux-2.4.15-rmk1-dsplinux1.6/arch/arm/plat-omap/include/mach1510/uncompress.h
 * Copyright (C) 2000 RidgeRun, Inc.
 * Author: Greg Lonnon <glonnon@ridgerun.com>
 *
 * Rewritten by:
 * Author: <source@mvista.com>
 * 2004 (c) MontaVista Software, Inc.
 *
 * 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.
 */

#include <linux/types.h>
#include <linux/serial_reg.h>
#include <mach/serial.h>

unsigned int system_rev;

#define UART_OMAP_MDR1        0x08  /* mode definition register */
#define OMAP_ID_730           0x355F
#define ID_MASK               0x7fff
#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
#define omap_get_id() ((*(volatile unsigned int *)(0xfffed404)) >> 12) & ID_MASK

static void putc(int c)
{
      volatile u8 * uart = 0;
      int shift = 2;

#ifdef CONFIG_MACH_OMAP_PALMTE
      return;
#endif

#ifdef CONFIG_ARCH_OMAP
#ifdef      CONFIG_OMAP_LL_DEBUG_UART3
      uart = (volatile u8 *)(OMAP_UART3_BASE);
#elif defined(CONFIG_OMAP_LL_DEBUG_UART2)
      uart = (volatile u8 *)(OMAP_UART2_BASE);
#else
      uart = (volatile u8 *)(OMAP_UART1_BASE);
#endif

#ifdef CONFIG_ARCH_OMAP1
      /* Determine which serial port to use */
      do {
            /* MMU is not on, so cpu_is_omapXXXX() won't work here */
            unsigned int omap_id = omap_get_id();

            if (omap_id == OMAP_ID_730)
                  shift = 0;

            if (check_port(uart, shift))
                  break;
            /* Silent boot if no serial ports are enabled. */
            return;
      } while (0);
#endif /* CONFIG_ARCH_OMAP1 */
#endif

      /*
       * Now, xmit each character
       */
      while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
            barrier();
      uart[UART_TX << shift] = c;
}

static inline void flush(void)
{
}

/*
 * nothing to do
 */
#define arch_decomp_setup()
#define arch_decomp_wdog()

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