include/asm-arm/arch-omap/uncompress.h

   1 /*
   2  * linux/include/asm-arm/arch-omap/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/include/asm-arm/arch-omap1510/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 <asm/arch/serial.h>
  23
  24 unsigned 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
  32 static 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
  75 static inline void flush(void)
  76 {
  77 }
  78
  79 /*
  80  * nothing to do
  81  */
  82 #define arch_decomp_setup()
  83 #define arch_decomp_wdog()