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 #define MDR1_MODE_MASK                  0x07
  29
  30 static volatile u8 *uart_base;
  31 static int uart_shift;
  32
  33 /*
  34  * Store the DEBUG_LL uart number into memory.
  35  * See also debug-macro.S, and serial.c for related code.
  36  */
  37 static void set_omap_uart_info(unsigned char port)
  38 {
  39         *(volatile u32 *)OMAP_UART_INFO = port;
  40 }
  41
  42 static void putc(int c)
  43 {
  44         if (!uart_base)
  45                 return;
  46
  47         /* Check for UART 16x mode */
  48         if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
  49                 return;
  50
  51         while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
  52                 barrier();
  53         uart_base[UART_TX << uart_shift] = c;
  54 }
  55
  56 static inline void flush(void)
  57 {
  58 }
  59
  60 /*
  61  * Macros to configure UART1 and debug UART
  62  */
  63 #define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id)               \
  64         if (machine_is_##mach()) {                                      \
  65                 uart_base = (volatile u8 *)(dbg_uart);                  \
  66                 uart_shift = (dbg_shft);                                \
  67                 port = (dbg_id);                                        \
  68                 set_omap_uart_info(port);                               \
  69                 break;                                                  \
  70         }
  71
  72 #define DEBUG_LL_OMAP7XX(p, mach)                                       \
  73         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
  74                 OMAP1UART##p)
  75
  76 #define DEBUG_LL_OMAP1(p, mach)                                         \
  77         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  78                 OMAP1UART##p)
  79
  80 #define DEBUG_LL_OMAP2(p, mach)                                         \
  81         _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  82                 OMAP2UART##p)
  83
  84 #define DEBUG_LL_OMAP3(p, mach)                                         \
  85         _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  86                 OMAP3UART##p)
  87
  88 #define DEBUG_LL_OMAP4(p, mach)                                         \
  89         _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  90                 OMAP4UART##p)
  91
  92 /* Zoom2/3 shift is different for UART1 and external port */
  93 #define DEBUG_LL_ZOOM(mach)                                             \
  94         _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
  95
  96 static inline void __arch_decomp_setup(unsigned long arch_id)
  97 {
  98         int port = 0;
  99
 100         /*
 101          * Initialize the port based on the machine ID from the bootloader.
 102          * Note that we're using macros here instead of switch statement
 103          * as machine_is functions are optimized out for the boards that
 104          * are not selected.
 105          */
 106         do {
 107                 /* omap7xx/8xx based boards using UART1 with shift 0 */
 108                 DEBUG_LL_OMAP7XX(1, herald);
 109                 DEBUG_LL_OMAP7XX(1, omap_perseus2);
 110
 111                 /* omap15xx/16xx based boards using UART1 */
 112                 DEBUG_LL_OMAP1(1, ams_delta);
 113                 DEBUG_LL_OMAP1(1, nokia770);
 114                 DEBUG_LL_OMAP1(1, omap_h2);
 115                 DEBUG_LL_OMAP1(1, omap_h3);
 116                 DEBUG_LL_OMAP1(1, omap_innovator);
 117                 DEBUG_LL_OMAP1(1, omap_osk);
 118                 DEBUG_LL_OMAP1(1, omap_palmte);
 119                 DEBUG_LL_OMAP1(1, omap_palmz71);
 120
 121                 /* omap15xx/16xx based boards using UART2 */
 122                 DEBUG_LL_OMAP1(2, omap_palmtt);
 123
 124                 /* omap15xx/16xx based boards using UART3 */
 125                 DEBUG_LL_OMAP1(3, sx1);
 126
 127                 /* omap2 based boards using UART1 */
 128                 DEBUG_LL_OMAP2(1, omap2evm);
 129                 DEBUG_LL_OMAP2(1, omap_2430sdp);
 130                 DEBUG_LL_OMAP2(1, omap_apollon);
 131                 DEBUG_LL_OMAP2(1, omap_h4);
 132
 133                 /* omap2 based boards using UART3 */
 134                 DEBUG_LL_OMAP2(3, nokia_n800);
 135                 DEBUG_LL_OMAP2(3, nokia_n810);
 136                 DEBUG_LL_OMAP2(3, nokia_n810_wimax);
 137
 138                 /* omap3 based boards using UART1 */
 139                 DEBUG_LL_OMAP2(1, omap3evm);
 140                 DEBUG_LL_OMAP3(1, omap_3430sdp);
 141                 DEBUG_LL_OMAP3(1, omap_3630sdp);
 142                 DEBUG_LL_OMAP3(1, omap3530_lv_som);
 143                 DEBUG_LL_OMAP3(1, omap3_torpedo);
 144
 145                 /* omap3 based boards using UART3 */
 146                 DEBUG_LL_OMAP3(3, cm_t35);
 147                 DEBUG_LL_OMAP3(3, cm_t3517);
 148                 DEBUG_LL_OMAP3(3, igep0020);
 149                 DEBUG_LL_OMAP3(3, igep0030);
 150                 DEBUG_LL_OMAP3(3, nokia_rx51);
 151                 DEBUG_LL_OMAP3(3, omap3517evm);
 152                 DEBUG_LL_OMAP3(3, omap3_beagle);
 153                 DEBUG_LL_OMAP3(3, omap3_pandora);
 154                 DEBUG_LL_OMAP3(3, omap_ldp);
 155                 DEBUG_LL_OMAP3(3, overo);
 156                 DEBUG_LL_OMAP3(3, touchbook);
 157
 158                 /* omap4 based boards using UART3 */
 159                 DEBUG_LL_OMAP4(3, omap_4430sdp);
 160                 DEBUG_LL_OMAP4(3, omap4_panda);
 161
 162                 /* zoom2/3 external uart */
 163                 DEBUG_LL_ZOOM(omap_zoom2);
 164                 DEBUG_LL_ZOOM(omap_zoom3);
 165
 166         } while (0);
 167 }
 168
 169 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 170
 171 /*
 172  * nothing to do
 173  */
 174 #define arch_decomp_wdog()