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 static u32 *uart;
  29 static u32 *uart_info = (u32 *)(DAVINCI_UART_INFO);
  30
  31 /* PORT_16C550A, in polled non-fifo mode */
  32 static void putc(char c)
  33 {
  34         while (!(uart[UART_LSR] & UART_LSR_THRE))
  35                 barrier();
  36         uart[UART_TX] = c;
  37 }
  38
  39 static inline void flush(void)
  40 {
  41         while (!(uart[UART_LSR] & UART_LSR_THRE))
  42                 barrier();
  43 }
  44
  45 static inline void set_uart_info(u32 phys, void * __iomem virt)
  46 {
  47         uart = (u32 *)phys;
  48         uart_info[0] = phys;
  49         uart_info[1] = (u32)virt;
  50 }
  51
  52 #define _DEBUG_LL_ENTRY(machine, phys, virt)                    \
  53         if (machine_is_##machine()) {                           \
  54                 set_uart_info(phys, virt);                      \
  55                 break;                                          \
  56         }
  57
  58 #define DEBUG_LL_DAVINCI(machine, port)                         \
  59         _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE,     \
  60                         IO_ADDRESS(DAVINCI_UART##port##_BASE))
  61
  62 #define DEBUG_LL_DA8XX(machine, port)                           \
  63         _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE,       \
  64                         IO_ADDRESS(DA8XX_UART##port##_BASE))
  65
  66 #define DEBUG_LL_TNETV107X(machine, port)                       \
  67         _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE,   \
  68                         TNETV107X_UART##port##_VIRT)
  69
  70 static inline void __arch_decomp_setup(unsigned long arch_id)
  71 {
  72         /*
  73          * Initialize the port based on the machine ID from the bootloader.
  74          * Note that we're using macros here instead of switch statement
  75          * as machine_is functions are optimized out for the boards that
  76          * are not selected.
  77          */
  78         do {
  79                 /* Davinci boards */
  80                 DEBUG_LL_DAVINCI(davinci_evm,           0);
  81                 DEBUG_LL_DAVINCI(sffsdr,                0);
  82                 DEBUG_LL_DAVINCI(neuros_osd2,           0);
  83                 DEBUG_LL_DAVINCI(davinci_dm355_evm,     0);
  84                 DEBUG_LL_DAVINCI(dm355_leopard,         0);
  85                 DEBUG_LL_DAVINCI(davinci_dm6467_evm,    0);
  86                 DEBUG_LL_DAVINCI(davinci_dm365_evm,     0);
  87
  88                 /* DA8xx boards */
  89                 DEBUG_LL_DA8XX(davinci_da830_evm,       2);
  90                 DEBUG_LL_DA8XX(davinci_da850_evm,       2);
  91
  92                 /* TNETV107x boards */
  93                 DEBUG_LL_TNETV107X(tnetv107x,           1);
  94         } while (0);
  95 }
  96
  97 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
  98 #define arch_decomp_wdog()