arch/ppc/platforms/85xx/mpc85xx_ads_common.c

   1 /*
   2  * arch/ppc/platforms/85xx/mpc85xx_ads_common.c
   3  *
   4  * MPC85xx ADS board common 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/serial.h>
  30 #include <linux/module.h>
  31
  32 #include <asm/system.h>
  33 #include <asm/pgtable.h>
  34 #include <asm/page.h>
  35 #include <asm/atomic.h>
  36 #include <asm/time.h>
  37 #include <asm/io.h>
  38 #include <asm/machdep.h>
  39 #include <asm/prom.h>
  40 #include <asm/open_pic.h>
  41 #include <asm/bootinfo.h>
  42 #include <asm/pci-bridge.h>
  43 #include <asm/mpc85xx.h>
  44 #include <asm/irq.h>
  45 #include <asm/immap_85xx.h>
  46 #include <asm/ppc_sys.h>
  47
  48 #include <mm/mmu_decl.h>
  49
  50 #include <platforms/85xx/mpc85xx_ads_common.h>
  51
  52 #ifndef CONFIG_PCI
  53 unsigned long isa_io_base = 0;
  54 unsigned long isa_mem_base = 0;
  55 #endif
  56
  57 extern unsigned long total_memory;      /* in mm/init */
  58
  59 unsigned char __res[sizeof (bd_t)];
  60
  61 /* Internal interrupts are all Level Sensitive, and Positive Polarity */
  62
  63 static u_char mpc85xx_ads_openpic_initsenses[] __initdata = {
  64         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  0: L2 Cache */
  65         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  1: ECM */
  66         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  2: DDR DRAM */
  67         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  3: LBIU */
  68         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  4: DMA 0 */
  69         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  5: DMA 1 */
  70         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  6: DMA 2 */
  71         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  7: DMA 3 */
  72         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  8: PCI/PCI-X */
  73         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal  9: RIO Inbound Port Write Error */
  74         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 10: RIO Doorbell Inbound */
  75         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 11: RIO Outbound Message */
  76         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 12: RIO Inbound Message */
  77         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 13: TSEC 0 Transmit */
  78         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 14: TSEC 0 Receive */
  79         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 15: Unused */
  80         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 16: Unused */
  81         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 17: Unused */
  82         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 18: TSEC 0 Receive/Transmit Error */
  83         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 19: TSEC 1 Transmit */
  84         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 20: TSEC 1 Receive */
  85         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 21: Unused */
  86         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 22: Unused */
  87         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 23: Unused */
  88         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 24: TSEC 1 Receive/Transmit Error */
  89         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 25: Fast Ethernet */
  90         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 26: DUART */
  91         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 27: I2C */
  92         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 28: Performance Monitor */
  93         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 29: Unused */
  94         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 30: CPM */
  95         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* Internal 31: Unused */
  96         0x0,                                            /* External  0: */
  97 #if defined(CONFIG_PCI)
  98         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 1: PCI slot 0 */
  99         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 2: PCI slot 1 */
 100         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 3: PCI slot 2 */
 101         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 4: PCI slot 3 */
 102 #else
 103         0x0,                            /* External  1: */
 104         0x0,                            /* External  2: */
 105         0x0,                            /* External  3: */
 106         0x0,                            /* External  4: */
 107 #endif
 108         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 5: PHY */
 109         0x0,                            /* External  6: */
 110         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* External 7: PHY */
 111         0x0,                            /* External  8: */
 112         0x0,                            /* External  9: */
 113         0x0,                            /* External 10: */
 114         0x0,                            /* External 11: */
 115 };
 116
 117 /* ************************************************************************ */
 118 int
 119 mpc85xx_ads_show_cpuinfo(struct seq_file *m)
 120 {
 121         uint pvid, svid, phid1;
 122         uint memsize = total_memory;
 123         bd_t *binfo = (bd_t *) __res;
 124         unsigned int freq;
 125
 126         /* get the core frequency */
 127         freq = binfo->bi_intfreq;
 128
 129         pvid = mfspr(SPRN_PVR);
 130         svid = mfspr(SPRN_SVR);
 131
 132         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 133         seq_printf(m, "Machine\t\t: mpc%sads\n", cur_ppc_sys_spec->ppc_sys_name);
 134         seq_printf(m, "clock\t\t: %dMHz\n", freq / 1000000);
 135         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 136         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 137
 138         /* Display cpu Pll setting */
 139         phid1 = mfspr(SPRN_HID1);
 140         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 141
 142         /* Display the amount of memory */
 143         seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
 144
 145         return 0;
 146 }
 147
 148 void __init
 149 mpc85xx_ads_init_IRQ(void)
 150 {
 151         bd_t *binfo = (bd_t *) __res;
 152         /* Determine the Physical Address of the OpenPIC regs */
 153         phys_addr_t OpenPIC_PAddr =
 154             binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
 155         OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
 156         OpenPIC_InitSenses = mpc85xx_ads_openpic_initsenses;
 157         OpenPIC_NumInitSenses = sizeof (mpc85xx_ads_openpic_initsenses);
 158
 159         /* Skip reserved space and internal sources */
 160         openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);
 161         /* Map PIC IRQs 0-11 */
 162         openpic_set_sources(32, 12, OpenPIC_Addr + 0x10000);
 163
 164         /* we let openpic interrupts starting from an offset, to
 165          * leave space for cascading interrupts underneath.
 166          */
 167         openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);
 168
 169         return;
 170 }
 171
 172 #ifdef CONFIG_PCI
 173 /*
 174  * interrupt routing
 175  */
 176
 177 int
 178 mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
 179 {
 180         static char pci_irq_table[][4] =
 181             /*
 182              * This is little evil, but works around the fact
 183              * that revA boards have IDSEL starting at 18
 184              * and others boards (older) start at 12
 185              *
 186              *      PCI IDSEL/INTPIN->INTLINE
 187              *       A      B      C      D
 188              */
 189         {
 190                 {PIRQA, PIRQB, PIRQC, PIRQD},   /* IDSEL 2 */
 191                 {PIRQD, PIRQA, PIRQB, PIRQC},
 192                 {PIRQC, PIRQD, PIRQA, PIRQB},
 193                 {PIRQB, PIRQC, PIRQD, PIRQA},   /* IDSEL 5 */
 194                 {0, 0, 0, 0},   /* -- */
 195                 {0, 0, 0, 0},   /* -- */
 196                 {0, 0, 0, 0},   /* -- */
 197                 {0, 0, 0, 0},   /* -- */
 198                 {0, 0, 0, 0},   /* -- */
 199                 {0, 0, 0, 0},   /* -- */
 200                 {PIRQA, PIRQB, PIRQC, PIRQD},   /* IDSEL 12 */
 201                 {PIRQD, PIRQA, PIRQB, PIRQC},
 202                 {PIRQC, PIRQD, PIRQA, PIRQB},
 203                 {PIRQB, PIRQC, PIRQD, PIRQA},   /* IDSEL 15 */
 204                 {0, 0, 0, 0},   /* -- */
 205                 {0, 0, 0, 0},   /* -- */
 206                 {PIRQA, PIRQB, PIRQC, PIRQD},   /* IDSEL 18 */
 207                 {PIRQD, PIRQA, PIRQB, PIRQC},
 208                 {PIRQC, PIRQD, PIRQA, PIRQB},
 209                 {PIRQB, PIRQC, PIRQD, PIRQA},   /* IDSEL 21 */
 210         };
 211
 212         const long min_idsel = 2, max_idsel = 21, irqs_per_slot = 4;
 213         return PCI_IRQ_TABLE_LOOKUP;
 214 }
 215
 216 int
 217 mpc85xx_exclude_device(u_char bus, u_char devfn)
 218 {
 219         if (bus == 0 && PCI_SLOT(devfn) == 0)
 220                 return PCIBIOS_DEVICE_NOT_FOUND;
 221         else
 222                 return PCIBIOS_SUCCESSFUL;
 223 }
 224
 225 #endif /* CONFIG_PCI */