arch/ppc/platforms/lite5200.c

   1 /*
   2  * arch/ppc/platforms/lite5200.c
   3  *
   4  * Platform support file for the Freescale LITE5200 based on MPC52xx.
   5  * A maximum of this file should be moved to syslib/mpc52xx_?????
   6  * so that new platform based on MPC52xx need a minimal platform file
   7  * ( avoid code duplication )
   8  *
   9  *
  10  * Maintainer : Sylvain Munaut <tnt@246tNt.com>
  11  *
  12  * Based on the 2.4 code written by Kent Borg,
  13  * Dale Farnsworth <dale.farnsworth@mvista.com> and
  14  * Wolfgang Denk <wd@denx.de>
  15  *
  16  * Copyright 2004 Sylvain Munaut <tnt@246tNt.com>
  17  * Copyright 2003 Motorola Inc.
  18  * Copyright 2003 MontaVista Software Inc.
  19  * Copyright 2003 DENX Software Engineering (wd@denx.de)
  20  *
  21  * This file is licensed under the terms of the GNU General Public License
  22  * version 2. This program is licensed "as is" without any warranty of any
  23  * kind, whether express or implied.
  24  */
  25
  26 #include <linux/config.h>
  27 #include <linux/initrd.h>
  28 #include <linux/seq_file.h>
  29 #include <linux/kdev_t.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/console.h>
  32
  33 #include <asm/bootinfo.h>
  34 #include <asm/io.h>
  35 #include <asm/ocp.h>
  36 #include <asm/mpc52xx.h>
  37
  38
  39 extern int powersave_nap;
  40
  41 /* Board data given by U-Boot */
  42 bd_t __res;
  43 EXPORT_SYMBOL(__res);   /* For modules */
  44
  45
  46 /* ======================================================================== */
  47 /* OCP device definition                                                    */
  48 /* For board/shared resources like PSCs                                     */
  49 /* ======================================================================== */
  50 /* Be sure not to load conficting devices : e.g. loading the UART drivers for
  51  * PSC1 and then also loading a AC97 for this same PSC.
  52  * For details about how to create an entry, look in the doc of the concerned
  53  * driver ( eg drivers/serial/mpc52xx_uart.c for the PSC in uart mode )
  54  */
  55
  56 struct ocp_def board_ocp[] = {
  57         {
  58                 .vendor         = OCP_VENDOR_FREESCALE,
  59                 .function       = OCP_FUNC_PSC_UART,
  60                 .index          = 0,
  61                 .paddr          = MPC52xx_PSC1,
  62                 .irq            = MPC52xx_PSC1_IRQ,
  63                 .pm             = OCP_CPM_NA,
  64         },
  65         {       /* Terminating entry */
  66                 .vendor         = OCP_VENDOR_INVALID
  67         }
  68 };
  69
  70
  71 /* ======================================================================== */
  72 /* Platform specific code                                                   */
  73 /* ======================================================================== */
  74
  75 static int
  76 lite5200_show_cpuinfo(struct seq_file *m)
  77 {
  78         seq_printf(m, "machine\t\t: Freescale LITE5200\n");
  79         return 0;
  80 }
  81
  82 static void __init
  83 lite5200_setup_cpu(void)
  84 {
  85         struct mpc52xx_intr *intr;
  86
  87         u32 intr_ctrl;
  88
  89         /* Map zones */
  90         intr = (struct mpc52xx_intr *)
  91                 ioremap(MPC52xx_INTR,sizeof(struct mpc52xx_intr));
  92
  93         if (!intr) {
  94                 printk("lite5200.c: Error while mapping INTR during lite5200_setup_cpu\n");
  95                 goto unmap_regs;
  96         }
  97
  98         /* IRQ[0-3] setup : IRQ0     - Level Active Low  */
  99         /*                  IRQ[1-3] - Level Active High */
 100         intr_ctrl = in_be32(&intr->ctrl);
 101         intr_ctrl &= ~0x00ff0000;
 102         intr_ctrl |=  0x00c00000;
 103         out_be32(&intr->ctrl, intr_ctrl);
 104
 105         /* Unmap reg zone */
 106 unmap_regs:
 107         if (intr) iounmap(intr);
 108 }
 109
 110 static void __init
 111 lite5200_setup_arch(void)
 112 {
 113         /* Add board OCP definitions */
 114         mpc52xx_add_board_devices(board_ocp);
 115
 116         /* CPU & Port mux setup */
 117         lite5200_setup_cpu();
 118 }
 119
 120 void __init
 121 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 122               unsigned long r6, unsigned long r7)
 123 {
 124         /* Generic MPC52xx platform initialization */
 125         /* TODO Create one and move a max of stuff in it.
 126            Put this init in the syslib */
 127
 128         struct bi_record *bootinfo = find_bootinfo();
 129
 130         if (bootinfo)
 131                 parse_bootinfo(bootinfo);
 132         else {
 133                 /* Load the bd_t board info structure */
 134                 if (r3)
 135                         memcpy((void*)&__res,(void*)(r3+KERNELBASE),
 136                                         sizeof(bd_t));
 137
 138 #ifdef CONFIG_BLK_DEV_INITRD
 139                 /* Load the initrd */
 140                 if (r4) {
 141                         initrd_start = r4 + KERNELBASE;
 142                         initrd_end = r5 + KERNELBASE;
 143                 }
 144 #endif
 145
 146                 /* Load the command line */
 147                 if (r6) {
 148                         *(char *)(r7+KERNELBASE) = 0;
 149                         strcpy(cmd_line, (char *)(r6+KERNELBASE));
 150                 }
 151         }
 152
 153         /* BAT setup */
 154         mpc52xx_set_bat();
 155
 156         /* No ISA bus AFAIK */
 157         isa_io_base             = 0;
 158         isa_mem_base            = 0;
 159
 160         /* Powersave */
 161         powersave_nap = 1;      /* We allow this platform to NAP */
 162
 163         /* Setup the ppc_md struct */
 164         ppc_md.setup_arch       = lite5200_setup_arch;
 165         ppc_md.show_cpuinfo     = lite5200_show_cpuinfo;
 166         ppc_md.show_percpuinfo  = NULL;
 167         ppc_md.init_IRQ         = mpc52xx_init_irq;
 168         ppc_md.get_irq          = mpc52xx_get_irq;
 169
 170         ppc_md.find_end_of_memory = mpc52xx_find_end_of_memory;
 171         ppc_md.setup_io_mappings  = mpc52xx_map_io;
 172
 173         ppc_md.restart          = mpc52xx_restart;
 174         ppc_md.power_off        = mpc52xx_power_off;
 175         ppc_md.halt             = mpc52xx_halt;
 176
 177                 /* No time keeper on the LITE5200 */
 178         ppc_md.time_init        = NULL;
 179         ppc_md.get_rtc_time     = NULL;
 180         ppc_md.set_rtc_time     = NULL;
 181
 182         ppc_md.calibrate_decr   = mpc52xx_calibrate_decr;
 183 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 184         ppc_md.progress         = mpc52xx_progress;
 185 #endif
 186 }
 187