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/mach-types.h>
  24
  25 #include <plat/serial.h>
  26
  27 static volatile u8 *uart1_base;
  28 static int uart1_shift;
  29
  30 static volatile u8 *uart_base;
  31 static int uart_shift;
  32
  33 /*
  34  * Store the DEBUG_LL uart number into UART1 scratchpad register.
  35  * See also debug-macro.S, and serial.c for related code.
  36  *
  37  * Please note that we currently assume that:
  38  * - UART1 clocks are enabled for register access
  39  * - UART1 scratchpad register can be used
  40  */
  41 static void set_uart1_scratchpad(unsigned char port)
  42 {
  43         uart1_base[UART_SCR << uart1_shift] = port;
  44 }
  45
  46 static void putc(int c)
  47 {
  48         if (!uart_base)
  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, uart1_phys, uart1_shft,                   \
  64                         dbg_uart, dbg_shft, dbg_id)                     \
  65         if (machine_is_##mach()) {                                      \
  66                 uart1_base = (volatile u8 *)(uart1_phys);               \
  67                 uart1_shift = (uart1_shft);                             \
  68                 uart_base = (volatile u8 *)(dbg_uart);                  \
  69                 uart_shift = (dbg_shft);                                \
  70                 port = (dbg_id);                                        \
  71                 set_uart1_scratchpad(port);                             \
  72                 break;                                                  \
  73         }
  74
  75 #define DEBUG_LL_OMAP7XX(p, mach)                                       \
  76         _DEBUG_LL_ENTRY(mach, OMAP1_UART1_BASE, OMAP7XX_PORT_SHIFT,     \
  77                 OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, OMAP1UART##p)
  78
  79 #define DEBUG_LL_OMAP1(p, mach)                                         \
  80         _DEBUG_LL_ENTRY(mach, OMAP1_UART1_BASE, OMAP_PORT_SHIFT,        \
  81                 OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP1UART##p)
  82
  83 #define DEBUG_LL_OMAP2(p, mach)                                         \
  84         _DEBUG_LL_ENTRY(mach, OMAP2_UART1_BASE, OMAP_PORT_SHIFT,        \
  85                 OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP2UART##p)
  86
  87 #define DEBUG_LL_OMAP3(p, mach)                                         \
  88         _DEBUG_LL_ENTRY(mach, OMAP3_UART1_BASE, OMAP_PORT_SHIFT,        \
  89                 OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP3UART##p)
  90
  91 #define DEBUG_LL_OMAP4(p, mach)                                         \
  92         _DEBUG_LL_ENTRY(mach, OMAP4_UART1_BASE, OMAP_PORT_SHIFT,        \
  93                 OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP4UART##p)
  94
  95 /* Zoom2/3 shift is different for UART1 and external port */
  96 #define DEBUG_LL_ZOOM(mach)                                             \
  97         _DEBUG_LL_ENTRY(mach, OMAP2_UART1_BASE, OMAP_PORT_SHIFT,        \
  98                 ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
  99
 100 static inline void __arch_decomp_setup(unsigned long arch_id)
 101 {
 102         int port = 0;
 103
 104         /*
 105          * Initialize the port based on the machine ID from the bootloader.
 106          * Note that we're using macros here instead of switch statement
 107          * as machine_is functions are optimized out for the boards that
 108          * are not selected.
 109          */
 110         do {
 111                 /* omap7xx/8xx based boards using UART1 with shift 0 */
 112                 DEBUG_LL_OMAP7XX(1, herald);
 113                 DEBUG_LL_OMAP7XX(1, omap_perseus2);
 114
 115                 /* omap15xx/16xx based boards using UART1 */
 116                 DEBUG_LL_OMAP1(1, ams_delta);
 117                 DEBUG_LL_OMAP1(1, nokia770);
 118                 DEBUG_LL_OMAP1(1, omap_h2);
 119                 DEBUG_LL_OMAP1(1, omap_h3);
 120                 DEBUG_LL_OMAP1(1, omap_innovator);
 121                 DEBUG_LL_OMAP1(1, omap_osk);
 122                 DEBUG_LL_OMAP1(1, omap_palmte);
 123                 DEBUG_LL_OMAP1(1, omap_palmz71);
 124
 125                 /* omap15xx/16xx based boards using UART2 */
 126                 DEBUG_LL_OMAP1(2, omap_palmtt);
 127
 128                 /* omap15xx/16xx based boards using UART3 */
 129                 DEBUG_LL_OMAP1(3, sx1);
 130
 131                 /* omap2 based boards using UART1 */
 132                 DEBUG_LL_OMAP2(1, omap2evm);
 133                 DEBUG_LL_OMAP2(1, omap_2430sdp);
 134                 DEBUG_LL_OMAP2(1, omap_apollon);
 135                 DEBUG_LL_OMAP2(1, omap_h4);
 136
 137                 /* omap2 based boards using UART3 */
 138                 DEBUG_LL_OMAP2(3, nokia_n800);
 139                 DEBUG_LL_OMAP2(3, nokia_n810);
 140                 DEBUG_LL_OMAP2(3, nokia_n810_wimax);
 141
 142                 /* omap3 based boards using UART1 */
 143                 DEBUG_LL_OMAP2(1, omap3evm);
 144                 DEBUG_LL_OMAP3(1, omap_3430sdp);
 145                 DEBUG_LL_OMAP3(1, omap_3630sdp);
 146
 147                 /* omap3 based boards using UART3 */
 148                 DEBUG_LL_OMAP3(3, cm_t35);
 149                 DEBUG_LL_OMAP3(3, igep0020);
 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
 161                 /* zoom2/3 external uart */
 162                 DEBUG_LL_ZOOM(omap_zoom2);
 163                 DEBUG_LL_ZOOM(omap_zoom3);
 164
 165         } while (0);
 166 }
 167
 168 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
 169
 170 /*
 171  * nothing to do
 172  */
 173 #define arch_decomp_wdog()