LXR linux/arch/arm/plat-omap/include/mach/uncompress.h

   1/*
   2 * arch/arm/plat-omap/include/mach/uncompress.h
   3 *
   4 * Serial port stubs for kernel decompress status messages
   5 *
   6 * Initially based on:
   7 * linux-2.4.15-rmk1-dsplinux1.6/arch/arm/plat-omap/include/mach1510/uncompress.h
   8 * Copyright (C) 2000 RidgeRun, Inc.
   9 * Author: Greg Lonnon <glonnon@ridgerun.com>
  10 *
  11 * Rewritten by:
  12 * Author: <source@mvista.com>
  13 * 2004 (c) MontaVista Software, Inc.
  14 *
  15 * This file is licensed under the terms of the GNU General Public License
  16 * version 2. This program is licensed "as is" without any warranty of any
  17 * kind, whether express or implied.
  18 */
  19
  20#include <linux/types.h>
  21#include <linux/serial_reg.h>
  22#include <mach/serial.h>
  23
  24unsigned int system_rev;
  25
  26#define UART_OMAP_MDR1          0x08    /* mode definition register */
  27#define OMAP_ID_730             0x355F
  28#define ID_MASK                 0x7fff
  29#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
  30#define omap_get_id() ((*(volatile unsigned int *)(0xfffed404)) >> 12) & ID_MASK
  31
  32static void putc(int c)
  33{
  34        volatile u8 * uart = 0;
  35        int shift = 2;
  36
  37#ifdef CONFIG_MACH_OMAP_PALMTE
  38        return;
  39#endif
  40
  41#ifdef CONFIG_ARCH_OMAP
  42#ifdef  CONFIG_OMAP_LL_DEBUG_UART3
  43        uart = (volatile u8 *)(OMAP_UART3_BASE);
  44#elif defined(CONFIG_OMAP_LL_DEBUG_UART2)
  45        uart = (volatile u8 *)(OMAP_UART2_BASE);
  46#else
  47        uart = (volatile u8 *)(OMAP_UART1_BASE);
  48#endif
  49
  50#ifdef CONFIG_ARCH_OMAP1
  51        /* Determine which serial port to use */
  52        do {
  53                /* MMU is not on, so cpu_is_omapXXXX() won't work here */
  54                unsigned int omap_id = omap_get_id();
  55
  56                if (omap_id == OMAP_ID_730)
  57                        shift = 0;
  58
  59                if (check_port(uart, shift))
  60                        break;
  61                /* Silent boot if no serial ports are enabled. */
  62                return;
  63        } while (0);
  64#endif /* CONFIG_ARCH_OMAP1 */
  65#endif
  66
  67        /*
  68         * Now, xmit each character
  69         */
  70        while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
  71                barrier();
  72        uart[UART_TX << shift] = c;
  73}
  74
  75static inline void flush(void)
  76{
  77}
  78
  79/*
  80 * nothing to do
  81 */
  82#define arch_decomp_setup()
  83#define arch_decomp_wdog()
  84