arch/arm/plat-omap/include/plat/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
  23 #include <asm/memory.h>
  24 #include <asm/mach-types.h>
  25
  26 #include <plat/serial.h>
  27
  28 static volatile u8 *uart_base;
  29 static int uart_shift;
  30
  31 /*
  32  * Store the DEBUG_LL uart number into memory.
  33  * See also debug-macro.S, and serial.c for related code.
  34  */
  35 static void set_omap_uart_info(unsigned char port)
  36 {
  37         *(volatile u32 *)OMAP_UART_INFO = port;
  38 }
  39
  40 static void putc(int c)
  41 {
  42         if (!uart_base)
  43                 return;
  44
  45         while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
  46                 barrier();
  47         uart_base[UART_TX << uart_shift] = c;
  48 }
  49
  50 static inline void flush(void)
  51 {
  52 }
  53
  54 /*
  55  * Macros to configure UART1 and debug UART
  56  */
  57 #define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id)               \
  58         if (machine_is_##mach()) {                                      \
  59                 uart_base = (volatile u8 *)(dbg_uart);                  \
  60                 uart_shift = (dbg_shft);                                \
  61                 port = (dbg_id);                                        \
  62                 set_omap_uart_info(port);                               \
  63                 break;                                                  \
  64         }
  65
  66 #define DEBUG_LL_OMAP7XX(p, mach)                                       \
  67         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
  68                 OMAP1UART##p)
  69
  70 #define DEBUG_LL_OMAP1(p, mach)                                         \
  71         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  72                 OMAP1UART##p)
  73
  74 #define DEBUG_LL_OMAP2(p, mach)                                         \
  75         _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  76                 OMAP2UART##p)
  77
  78 #define DEBUG_LL_OMAP3(p, mach)                                         \
  79         _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  80                 OMAP3UART##p)
  81
  82 #define DEBUG_LL_OMAP4(p, mach)                                         \
  83         _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  84                 OMAP4UART##p)
  85
  86 /* Zoom2/3 shift is different for UART1 and external port */
  87 #define DEBUG_LL_ZOOM(mach)                                             \
  88         _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
  89
  90 static inline void __arch_decomp_setup(unsigned long arch_id)
  91 {
  92         int port = 0;
  93
  94         /*
  95          * Initialize the port based on the machine ID from the bootloader.
  96          * Note that we're using macros here instead of switch statement
  97          * as machine_is functions are optimized out for the boards that
  98          * are not selected.
  99          */
 100         do {
 101                 /* omap7xx/8xx based boards using UART1 with shift 0 */
 102                 DEBUG_LL_OMAP7XX(1, herald);
 103                 DEBUG_LL_OMAP7XX(1, omap_perseus2);
 104
 105                 /* omap15xx/16xx based boards using UART1 */
 106                 DEBUG_LL_OMAP1(1, ams_delta);
 107                 DEBUG_LL_OMAP1(1, nokia770);
 108                 DEBUG_LL_OMAP1(1, omap_h2);
 109                 DEBUG_LL_OMAP1(1, omap_h3);
 110                 DEBUG_LL_OMAP1(1, omap_innovator);
 111                 DEBUG_LL_OMAP1(1, omap_osk);
 112                 DEBUG_LL_OMAP1(1, omap_palmte);
 113                 DEBUG_LL_OMAP1(1, omap_palmz71);
 114
 115                 /* omap15xx/16xx based boards using UART2 */
 116                 DEBUG_LL_OMAP1(2, omap_palmtt);
 117
 118                 /* omap15xx/16xx based boards using UART3 */
 119                 DEBUG_LL_OMAP1(3, sx1);
 120
 121                 /* omap2 based boards using UART1 */
 122                 DEBUG_LL_OMAP2(1, omap2evm);
 123                 DEBUG_LL_OMAP2(1, omap_2430sdp);
 124                 DEBUG_LL_OMAP2(1, omap_apollon);
 125                 DEBUG_LL_OMAP2(1, omap_h4);
 126
 127                 /* omap2 based boards using UART3 */
 128                 DEBUG_LL_OMAP2(3, nokia_n800);
 129                 DEBUG_LL_OMAP2(3, nokia_n810);
 130                 DEBUG_LL_OMAP2(3, nokia_n810_wimax);
 131
 132                 /* omap3 based boards using UART1 */
 133                 DEBUG_LL_OMAP2(1, omap3evm);
 134                 DEBUG_LL_OMAP3(1, omap_3430sdp);
 135                 DEBUG_LL_OMAP3(1, omap_3630sdp);
 136
 137                 /* omap3 based boards using UART3 */
 138                 DEBUG_LL_OMAP3(3, cm_t35);
 139                 DEBUG_LL_OMAP3(3, igep0020);
 140                 DEBUG_LL_OMAP3(3, nokia_rx51);
 141                 DEBUG_LL_OMAP3(3, omap3517evm);
 142                 DEBUG_LL_OMAP3(3, omap3_beagle);
 143                 DEBUG_LL_OMAP3(3, omap3_pandora);
 144                 DEBUG_LL_OMAP3(3, omap_ldp);
 145                 DEBUG_LL_OMAP3(3, overo);
 146                 DEBUG_LL_OMAP3(3, touchbook);
 147
 148                 /* omap4 based boards using UART3 */
 149                 DEBUG_LL_OMAP4(3, omap_4430sdp);
 150
 151                 /* zoom2/3 external uart */
 152                 DEBUG_LL_ZOOM(omap_zoom2);
 153                 DEBUG_LL_ZOOM(omap_zoom3);
 154
 155         } while (0);
 156 }
 157
 158 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 159
 160 /*
 161  * nothing to do
 162  */
 163 #define arch_decomp_wdog()