arch/arm/mach-footbridge/arch.c

   1 /*
   2  * linux/arch/arm/mach-footbridge/arch.c
   3  *
   4  * Architecture specific fixups.  This is where any
   5  * parameters in the params struct are fixed up, or
   6  * any additional architecture specific information
   7  * is pulled from the params struct.
   8  */
   9 #include <linux/config.h>
  10 #include <linux/module.h>
  11 #include <linux/tty.h>
  12 #include <linux/delay.h>
  13 #include <linux/pm.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/hardware/dec21285.h>
  17 #include <asm/elf.h>
  18 #include <asm/setup.h>
  19 #include <asm/mach-types.h>
  20
  21 #include <asm/mach/arch.h>
  22
  23 extern void footbridge_map_io(void);
  24 extern void footbridge_init_irq(void);
  25
  26 unsigned int mem_fclk_21285 = 50000000;
  27
  28 EXPORT_SYMBOL(mem_fclk_21285);
  29
  30 static int __init parse_tag_memclk(const struct tag *tag)
  31 {
  32         mem_fclk_21285 = tag->u.memclk.fmemclk;
  33         return 0;
  34 }
  35
  36 __tagtable(ATAG_MEMCLK, parse_tag_memclk);
  37
  38 #ifdef CONFIG_ARCH_EBSA285
  39
  40 static void __init
  41 fixup_ebsa285(struct machine_desc *desc, struct param_struct *params,
  42               char **cmdline, struct meminfo *mi)
  43 {
  44 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
  45         ORIG_X           = params->u1.s.video_x;
  46         ORIG_Y           = params->u1.s.video_y;
  47         ORIG_VIDEO_COLS  = params->u1.s.video_num_cols;
  48         ORIG_VIDEO_LINES = params->u1.s.video_num_rows;
  49 #endif
  50 }
  51
  52 MACHINE_START(EBSA285, "EBSA285")
  53         MAINTAINER("Russell King")
  54         BOOT_MEM(0x00000000, DC21285_ARMCSR_BASE, 0xfe000000)
  55         BOOT_PARAMS(0x00000100)
  56         VIDEO(0x000a0000, 0x000bffff)
  57         FIXUP(fixup_ebsa285)
  58         MAPIO(footbridge_map_io)
  59         INITIRQ(footbridge_init_irq)
  60 MACHINE_END
  61 #endif
  62
  63 #ifdef CONFIG_ARCH_NETWINDER
  64 /*
  65  * Older NeTTroms either do not provide a parameters
  66  * page, or they don't supply correct information in
  67  * the parameter page.
  68  */
  69 static void __init
  70 fixup_netwinder(struct machine_desc *desc, struct param_struct *params,
  71                 char **cmdline, struct meminfo *mi)
  72 {
  73 #ifdef CONFIG_ISAPNP
  74         extern int isapnp_disable;
  75
  76         /*
  77          * We must not use the kernels ISAPnP code
  78          * on the NetWinder - it will reset the settings
  79          * for the WaveArtist chip and render it inoperable.
  80          */
  81         isapnp_disable = 1;
  82 #endif
  83
  84         if (params->u1.s.nr_pages != 0x02000 &&
  85             params->u1.s.nr_pages != 0x04000 &&
  86             params->u1.s.nr_pages != 0x08000 &&
  87             params->u1.s.nr_pages != 0x10000) {
  88                 printk(KERN_WARNING "Warning: bad NeTTrom parameters "
  89                        "detected, using defaults\n");
  90
  91                 params->u1.s.nr_pages = 0x1000; /* 16MB */
  92                 params->u1.s.ramdisk_size = 0;
  93                 params->u1.s.flags = FLAG_READONLY;
  94                 params->u1.s.initrd_start = 0;
  95                 params->u1.s.initrd_size = 0;
  96                 params->u1.s.rd_start = 0;
  97         }
  98 }
  99
 100 MACHINE_START(NETWINDER, "Rebel-NetWinder")
 101         MAINTAINER("Russell King/Rebel.com")
 102         BOOT_MEM(0x00000000, DC21285_ARMCSR_BASE, 0xfe000000)
 103         BOOT_PARAMS(0x00000100)
 104         VIDEO(0x000a0000, 0x000bffff)
 105         DISABLE_PARPORT(0)
 106         DISABLE_PARPORT(2)
 107         FIXUP(fixup_netwinder)
 108         MAPIO(footbridge_map_io)
 109         INITIRQ(footbridge_init_irq)
 110 MACHINE_END
 111 #endif
 112
 113 #ifdef CONFIG_ARCH_CATS
 114 /*
 115  * CATS uses soft-reboot by default, since
 116  * hard reboots fail on early boards.
 117  */
 118 static void __init
 119 fixup_cats(struct machine_desc *desc, struct param_struct *unused,
 120            char **cmdline, struct meminfo *mi)
 121 {
 122         ORIG_VIDEO_LINES  = 25;
 123         ORIG_VIDEO_POINTS = 16;
 124         ORIG_Y = 24;
 125 }
 126
 127 MACHINE_START(CATS, "Chalice-CATS")
 128         MAINTAINER("Philip Blundell")
 129         BOOT_MEM(0x00000000, DC21285_ARMCSR_BASE, 0xfe000000)
 130         BOOT_PARAMS(0x00000100)
 131         SOFT_REBOOT
 132         FIXUP(fixup_cats)
 133         MAPIO(footbridge_map_io)
 134         INITIRQ(footbridge_init_irq)
 135 MACHINE_END
 136 #endif
 137
 138 #ifdef CONFIG_ARCH_CO285
 139
 140 static void __init
 141 fixup_coebsa285(struct machine_desc *desc, struct param_struct *unused,
 142                 char **cmdline, struct meminfo *mi)
 143 {
 144         extern unsigned long boot_memory_end;
 145         extern char boot_command_line[];
 146
 147         mi->nr_banks      = 1;
 148         mi->bank[0].start = PHYS_OFFSET;
 149         mi->bank[0].size  = boot_memory_end;
 150         mi->bank[0].node  = 0;
 151
 152         *cmdline = boot_command_line;
 153 }
 154
 155 MACHINE_START(CO285, "co-EBSA285")
 156         MAINTAINER("Mark van Doesburg")
 157         BOOT_MEM(0x00000000, DC21285_ARMCSR_BASE, 0x7cf00000)
 158         FIXUP(fixup_coebsa285)
 159         MAPIO(footbridge_map_io)
 160         INITIRQ(footbridge_init_irq)
 161 MACHINE_END
 162 #endif
 163
 164 #ifdef CONFIG_ARCH_PERSONAL_SERVER
 165 MACHINE_START(PERSONAL_SERVER, "Compaq-PersonalServer")
 166         MAINTAINER("Jamey Hicks / George France")
 167         BOOT_MEM(0x00000000, DC21285_ARMCSR_BASE, 0xfe000000)
 168         BOOT_PARAMS(0x00000100)
 169         MAPIO(footbridge_map_io)
 170         INITIRQ(footbridge_init_irq)
 171 MACHINE_END
 172 #endif