arch/arm/mach-davinci/include/mach/uncompress.h

   1 /*
   2  * Serial port stubs for kernel decompress status messages
   3  *
   4  * Initially based on:
   5  * arch/arm/plat-omap/include/mach/uncompress.h
   6  *
   7  * Original copyrights follow.
   8  *
   9  * Copyright (C) 2000 RidgeRun, Inc.
  10  * Author: Greg Lonnon <glonnon@ridgerun.com>
  11  *
  12  * Rewritten by:
  13  * Author: <source@mvista.com>
  14  * 2004 (c) MontaVista Software, Inc.
  15  *
  16  * This file is licensed under the terms of the GNU General Public License
  17  * version 2. This program is licensed "as is" without any warranty of any
  18  * kind, whether express or implied.
  19  */
  20
  21 #include <linux/types.h>
  22 #include <linux/serial_reg.h>
  23
  24 #include <asm/mach-types.h>
  25
  26 #include <mach/serial.h>
  27
  28 u32 *uart;
  29
  30 /* PORT_16C550A, in polled non-fifo mode */
  31 static void putc(char c)
  32 {
  33         while (!(uart[UART_LSR] & UART_LSR_THRE))
  34                 barrier();
  35         uart[UART_TX] = c;
  36 }
  37
  38 static inline void flush(void)
  39 {
  40         while (!(uart[UART_LSR] & UART_LSR_THRE))
  41                 barrier();
  42 }
  43
  44 static inline void set_uart_info(u32 phys, void * __iomem virt)
  45 {
  46         u32 *uart_info = (u32 *)(DAVINCI_UART_INFO);
  47
  48         uart = (u32 *)phys;
  49         uart_info[0] = phys;
  50         uart_info[1] = (u32)virt;
  51 }
  52
  53 #define _DEBUG_LL_ENTRY(machine, phys, virt)                    \
  54         if (machine_is_##machine()) {                           \
  55                 set_uart_info(phys, virt);                      \
  56                 break;                                          \
  57         }
  58
  59 #define DEBUG_LL_DAVINCI(machine, port)                         \
  60         _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE,     \
  61                         IO_ADDRESS(DAVINCI_UART##port##_BASE))
  62
  63 #define DEBUG_LL_DA8XX(machine, port)                           \
  64         _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE,       \
  65                         IO_ADDRESS(DA8XX_UART##port##_BASE))
  66
  67 #define DEBUG_LL_TNETV107X(machine, port)                       \
  68         _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE,   \
  69                         TNETV107X_UART##port##_VIRT)
  70
  71 static inline void __arch_decomp_setup(unsigned long arch_id)
  72 {
  73         /*
  74          * Initialize the port based on the machine ID from the bootloader.
  75          * Note that we're using macros here instead of switch statement
  76          * as machine_is functions are optimized out for the boards that
  77          * are not selected.
  78          */
  79         do {
  80                 /* Davinci boards */
  81                 DEBUG_LL_DAVINCI(davinci_evm,           0);
  82                 DEBUG_LL_DAVINCI(sffsdr,                0);
  83                 DEBUG_LL_DAVINCI(neuros_osd2,           0);
  84                 DEBUG_LL_DAVINCI(davinci_dm355_evm,     0);
  85                 DEBUG_LL_DAVINCI(dm355_leopard,         0);
  86                 DEBUG_LL_DAVINCI(davinci_dm6467_evm,    0);
  87                 DEBUG_LL_DAVINCI(davinci_dm365_evm,     0);
  88
  89                 /* DA8xx boards */
  90                 DEBUG_LL_DA8XX(davinci_da830_evm,       2);
  91                 DEBUG_LL_DA8XX(davinci_da850_evm,       2);
  92                 DEBUG_LL_DA8XX(mityomapl138,            1);
  93                 DEBUG_LL_DA8XX(omapl138_hawkboard,      2);
  94
  95                 /* TNETV107x boards */
  96                 DEBUG_LL_TNETV107X(tnetv107x,           1);
  97         } while (0);
  98 }
  99
 100 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 101 #define arch_decomp_wdog()