arch/ppc/platforms/85xx/mpc8560_ads.c

   1 /*
   2  * arch/ppc/platforms/85xx/mpc8560_ads.c
   3  *
   4  * MPC8560ADS board specific routines
   5  *
   6  * Maintainer: Kumar Gala <kumar.gala@freescale.com>
   7  *
   8  * Copyright 2004 Freescale Semiconductor Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/stddef.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/reboot.h>
  22 #include <linux/pci.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/major.h>
  25 #include <linux/console.h>
  26 #include <linux/delay.h>
  27 #include <linux/irq.h>
  28 #include <linux/seq_file.h>
  29 #include <linux/root_dev.h>
  30 #include <linux/serial.h>
  31 #include <linux/tty.h>  /* for linux/serial_core.h */
  32 #include <linux/serial_core.h>
  33 #include <linux/initrd.h>
  34 #include <linux/module.h>
  35 #include <linux/fsl_devices.h>
  36
  37 #include <asm/system.h>
  38 #include <asm/pgtable.h>
  39 #include <asm/page.h>
  40 #include <asm/atomic.h>
  41 #include <asm/time.h>
  42 #include <asm/io.h>
  43 #include <asm/machdep.h>
  44 #include <asm/open_pic.h>
  45 #include <asm/bootinfo.h>
  46 #include <asm/pci-bridge.h>
  47 #include <asm/mpc85xx.h>
  48 #include <asm/irq.h>
  49 #include <asm/immap_85xx.h>
  50 #include <asm/kgdb.h>
  51 #include <asm/ppc_sys.h>
  52 #include <asm/cpm2.h>
  53 #include <mm/mmu_decl.h>
  54
  55 #include <syslib/cpm2_pic.h>
  56 #include <syslib/ppc85xx_common.h>
  57 #include <syslib/ppc85xx_setup.h>
  58
  59
  60 /* ************************************************************************
  61  *
  62  * Setup the architecture
  63  *
  64  */
  65
  66 static void __init
  67 mpc8560ads_setup_arch(void)
  68 {
  69         bd_t *binfo = (bd_t *) __res;
  70         unsigned int freq;
  71         struct gianfar_platform_data *pdata;
  72
  73         cpm2_reset();
  74
  75         /* get the core frequency */
  76         freq = binfo->bi_intfreq;
  77
  78         if (ppc_md.progress)
  79                 ppc_md.progress("mpc8560ads_setup_arch()", 0);
  80
  81         /* Set loops_per_jiffy to a half-way reasonable value,
  82            for use until calibrate_delay gets called. */
  83         loops_per_jiffy = freq / HZ;
  84
  85 #ifdef CONFIG_PCI
  86         /* setup PCI host bridges */
  87         mpc85xx_setup_hose();
  88 #endif
  89
  90         /* setup the board related information for the enet controllers */
  91         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
  92         if (pdata) {
  93                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
  94                 pdata->interruptPHY = MPC85xx_IRQ_EXT5;
  95                 pdata->phyid = 0;
  96                 /* fixup phy address */
  97                 pdata->phy_reg_addr += binfo->bi_immr_base;
  98                 memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
  99         }
 100
 101         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
 102         if (pdata) {
 103                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 104                 pdata->interruptPHY = MPC85xx_IRQ_EXT5;
 105                 pdata->phyid = 1;
 106                 /* fixup phy address */
 107                 pdata->phy_reg_addr += binfo->bi_immr_base;
 108                 memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
 109         }
 110
 111 #ifdef CONFIG_BLK_DEV_INITRD
 112         if (initrd_start)
 113                 ROOT_DEV = Root_RAM0;
 114         else
 115 #endif
 116 #ifdef  CONFIG_ROOT_NFS
 117                 ROOT_DEV = Root_NFS;
 118 #else
 119                 ROOT_DEV = Root_HDA1;
 120 #endif
 121 }
 122
 123 static irqreturn_t cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
 124 {
 125         while ((irq = cpm2_get_irq(regs)) >= 0)
 126                 __do_IRQ(irq, regs);
 127         return IRQ_HANDLED;
 128 }
 129
 130 static struct irqaction cpm2_irqaction = {
 131         .handler = cpm2_cascade,
 132         .flags = SA_INTERRUPT,
 133         .mask = CPU_MASK_NONE,
 134         .name = "cpm2_cascade",
 135 };
 136
 137 static void __init
 138 mpc8560_ads_init_IRQ(void)
 139 {
 140         /* Setup OpenPIC */
 141         mpc85xx_ads_init_IRQ();
 142
 143         /* Setup CPM2 PIC */
 144         cpm2_init_IRQ();
 145
 146         setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);
 147
 148         return;
 149 }
 150
 151
 152
 153 /* ************************************************************************ */
 154 void __init
 155 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 156               unsigned long r6, unsigned long r7)
 157 {
 158         /* parse_bootinfo must always be called first */
 159         parse_bootinfo(find_bootinfo());
 160
 161         /*
 162          * If we were passed in a board information, copy it into the
 163          * residual data area.
 164          */
 165         if (r3) {
 166                 memcpy((void *) __res, (void *) (r3 + KERNELBASE),
 167                        sizeof (bd_t));
 168
 169         }
 170 #if defined(CONFIG_BLK_DEV_INITRD)
 171         /*
 172          * If the init RAM disk has been configured in, and there's a valid
 173          * starting address for it, set it up.
 174          */
 175         if (r4) {
 176                 initrd_start = r4 + KERNELBASE;
 177                 initrd_end = r5 + KERNELBASE;
 178         }
 179 #endif                          /* CONFIG_BLK_DEV_INITRD */
 180
 181         /* Copy the kernel command line arguments to a safe place. */
 182
 183         if (r6) {
 184                 *(char *) (r7 + KERNELBASE) = 0;
 185                 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
 186         }
 187
 188         identify_ppc_sys_by_id(mfspr(SPRN_SVR));
 189
 190         /* setup the PowerPC module struct */
 191         ppc_md.setup_arch = mpc8560ads_setup_arch;
 192         ppc_md.show_cpuinfo = mpc85xx_ads_show_cpuinfo;
 193
 194         ppc_md.init_IRQ = mpc8560_ads_init_IRQ;
 195         ppc_md.get_irq = openpic_get_irq;
 196
 197         ppc_md.restart = mpc85xx_restart;
 198         ppc_md.power_off = mpc85xx_power_off;
 199         ppc_md.halt = mpc85xx_halt;
 200
 201         ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
 202
 203         ppc_md.time_init = NULL;
 204         ppc_md.set_rtc_time = NULL;
 205         ppc_md.get_rtc_time = NULL;
 206         ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
 207
 208         if (ppc_md.progress)
 209                 ppc_md.progress("mpc8560ads_init(): exit", 0);
 210
 211         return;
 212 }