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 volatile u8 *uart_base;
  31 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         /*
  40          * Get address of some.bss variable and round it down
  41          * a la CONFIG_AUTO_ZRELADDR.
  42          */
  43         u32 ram_start = (u32)&uart_shift & 0xf8000000;
  44         u32 *uart_info = (u32 *)(ram_start + OMAP_UART_INFO_OFS);
  45         *uart_info = port;
  46 }
  47
  48 static void putc(int c)
  49 {
  50         if (!uart_base)
  51                 return;
  52
  53         /* Check for UART 16x mode */
  54         if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
  55                 return;
  56
  57         while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
  58                 barrier();
  59         uart_base[UART_TX << uart_shift] = c;
  60 }
  61
  62 static inline void flush(void)
  63 {
  64 }
  65
  66 /*
  67  * Macros to configure UART1 and debug UART
  68  */
  69 #define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id)               \
  70         if (machine_is_##mach()) {                                      \
  71                 uart_base = (volatile u8 *)(dbg_uart);                  \
  72                 uart_shift = (dbg_shft);                                \
  73                 port = (dbg_id);                                        \
  74                 set_omap_uart_info(port);                               \
  75                 break;                                                  \
  76         }
  77
  78 #define DEBUG_LL_OMAP7XX(p, mach)                                       \
  79         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
  80                 OMAP1UART##p)
  81
  82 #define DEBUG_LL_OMAP1(p, mach)                                         \
  83         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  84                 OMAP1UART##p)
  85
  86 #define DEBUG_LL_OMAP2(p, mach)                                         \
  87         _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  88                 OMAP2UART##p)
  89
  90 #define DEBUG_LL_OMAP3(p, mach)                                         \
  91         _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  92                 OMAP3UART##p)
  93
  94 #define DEBUG_LL_OMAP4(p, mach)                                         \
  95         _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT,    \
  96                 OMAP4UART##p)
  97
  98 /* Zoom2/3 shift is different for UART1 and external port */
  99 #define DEBUG_LL_ZOOM(mach)                                             \
 100         _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
 101
 102 #define DEBUG_LL_TI81XX(p, mach)                                        \
 103         _DEBUG_LL_ENTRY(mach, TI81XX_UART##p##_BASE, OMAP_PORT_SHIFT,   \
 104                 TI81XXUART##p)
 105
 106 static inline void __arch_decomp_setup(unsigned long arch_id)
 107 {
 108         int port = 0;
 109
 110         /*
 111          * Initialize the port based on the machine ID from the bootloader.
 112          * Note that we're using macros here instead of switch statement
 113          * as machine_is functions are optimized out for the boards that
 114          * are not selected.
 115          */
 116         do {
 117                 /* omap7xx/8xx based boards using UART1 with shift 0 */
 118                 DEBUG_LL_OMAP7XX(1, herald);
 119                 DEBUG_LL_OMAP7XX(1, omap_perseus2);
 120
 121                 /* omap15xx/16xx based boards using UART1 */
 122                 DEBUG_LL_OMAP1(1, ams_delta);
 123                 DEBUG_LL_OMAP1(1, nokia770);
 124                 DEBUG_LL_OMAP1(1, omap_h2);
 125                 DEBUG_LL_OMAP1(1, omap_h3);
 126                 DEBUG_LL_OMAP1(1, omap_innovator);
 127                 DEBUG_LL_OMAP1(1, omap_osk);
 128                 DEBUG_LL_OMAP1(1, omap_palmte);
 129                 DEBUG_LL_OMAP1(1, omap_palmz71);
 130
 131                 /* omap15xx/16xx based boards using UART2 */
 132                 DEBUG_LL_OMAP1(2, omap_palmtt);
 133
 134                 /* omap15xx/16xx based boards using UART3 */
 135                 DEBUG_LL_OMAP1(3, sx1);
 136
 137                 /* omap2 based boards using UART1 */
 138                 DEBUG_LL_OMAP2(1, omap_2430sdp);
 139                 DEBUG_LL_OMAP2(1, omap_apollon);
 140                 DEBUG_LL_OMAP2(1, omap_h4);
 141
 142                 /* omap2 based boards using UART3 */
 143                 DEBUG_LL_OMAP2(3, nokia_n800);
 144                 DEBUG_LL_OMAP2(3, nokia_n810);
 145                 DEBUG_LL_OMAP2(3, nokia_n810_wimax);
 146
 147                 /* omap3 based boards using UART1 */
 148                 DEBUG_LL_OMAP2(1, omap3evm);
 149                 DEBUG_LL_OMAP3(1, omap_3430sdp);
 150                 DEBUG_LL_OMAP3(1, omap_3630sdp);
 151                 DEBUG_LL_OMAP3(1, omap3530_lv_som);
 152                 DEBUG_LL_OMAP3(1, omap3_torpedo);
 153
 154                 /* omap3 based boards using UART3 */
 155                 DEBUG_LL_OMAP3(3, cm_t35);
 156                 DEBUG_LL_OMAP3(3, cm_t3517);
 157                 DEBUG_LL_OMAP3(3, cm_t3730);
 158                 DEBUG_LL_OMAP3(3, craneboard);
 159                 DEBUG_LL_OMAP3(3, devkit8000);
 160                 DEBUG_LL_OMAP3(3, igep0020);
 161                 DEBUG_LL_OMAP3(3, igep0030);
 162                 DEBUG_LL_OMAP3(3, nokia_rm680);
 163                 DEBUG_LL_OMAP3(3, nokia_rx51);
 164                 DEBUG_LL_OMAP3(3, omap3517evm);
 165                 DEBUG_LL_OMAP3(3, omap3_beagle);
 166                 DEBUG_LL_OMAP3(3, omap3_pandora);
 167                 DEBUG_LL_OMAP3(3, omap_ldp);
 168                 DEBUG_LL_OMAP3(3, overo);
 169                 DEBUG_LL_OMAP3(3, touchbook);
 170
 171                 /* omap4 based boards using UART3 */
 172                 DEBUG_LL_OMAP4(3, omap_4430sdp);
 173                 DEBUG_LL_OMAP4(3, omap4_panda);
 174
 175                 /* zoom2/3 external uart */
 176                 DEBUG_LL_ZOOM(omap_zoom2);
 177                 DEBUG_LL_ZOOM(omap_zoom3);
 178
 179                 /* TI8168 base boards using UART3 */
 180                 DEBUG_LL_TI81XX(3, ti8168evm);
 181
 182                 /* TI8148 base boards using UART1 */
 183                 DEBUG_LL_TI81XX(1, ti8148evm);
 184
 185         } while (0);
 186 }
 187
 188 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 189
 190 /*
 191  * nothing to do
 192  */
 193 #define arch_decomp_wdog()