arch/powerpc/platforms/86xx/mpc8610_hpcd.c

   1 /*
   2  * MPC8610 HPCD board specific routines
   3  *
   4  * Initial author: Xianghua Xiao <x.xiao@freescale.com>
   5  * Recode: Jason Jin <jason.jin@freescale.com>
   6  *
   7  * Rewrite the interrupt routing. remove the 8259PIC support,
   8  * All the integrated device in ULI use sideband interrupt.
   9  *
  10  * Copyright 2007 Freescale Semiconductor Inc.
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/stddef.h>
  19 #include <linux/kernel.h>
  20 #include <linux/pci.h>
  21 #include <linux/kdev_t.h>
  22 #include <linux/delay.h>
  23 #include <linux/seq_file.h>
  24 #include <linux/of.h>
  25
  26 #include <asm/system.h>
  27 #include <asm/time.h>
  28 #include <asm/machdep.h>
  29 #include <asm/pci-bridge.h>
  30 #include <asm/mpc86xx.h>
  31 #include <asm/prom.h>
  32 #include <mm/mmu_decl.h>
  33 #include <asm/udbg.h>
  34
  35 #include <asm/mpic.h>
  36
  37 #include <linux/of_platform.h>
  38 #include <sysdev/fsl_pci.h>
  39 #include <sysdev/fsl_soc.h>
  40
  41 static struct of_device_id __initdata mpc8610_ids[] = {
  42         { .compatible = "fsl,mpc8610-immr", },
  43         {}
  44 };
  45
  46 static int __init mpc8610_declare_of_platform_devices(void)
  47 {
  48         /* Without this call, the SSI device driver won't get probed. */
  49         of_platform_bus_probe(NULL, mpc8610_ids, NULL);
  50
  51         return 0;
  52 }
  53 machine_device_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices);
  54
  55 void __init
  56 mpc86xx_hpcd_init_irq(void)
  57 {
  58         struct mpic *mpic1;
  59         struct device_node *np;
  60         struct resource res;
  61
  62         /* Determine PIC address. */
  63         np = of_find_node_by_type(NULL, "open-pic");
  64         if (np == NULL)
  65                 return;
  66         of_address_to_resource(np, 0, &res);
  67
  68         /* Alloc mpic structure and per isu has 16 INT entries. */
  69         mpic1 = mpic_alloc(np, res.start,
  70                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  71                         0, 256, " MPIC     ");
  72         BUG_ON(mpic1 == NULL);
  73
  74         mpic_init(mpic1);
  75 }
  76
  77 #ifdef CONFIG_PCI
  78 static void __devinit quirk_uli1575(struct pci_dev *dev)
  79 {
  80         u32 temp32;
  81
  82         /* Disable INTx */
  83         pci_read_config_dword(dev, 0x48, &temp32);
  84         pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
  85
  86         /* Enable sideband interrupt */
  87         pci_read_config_dword(dev, 0x90, &temp32);
  88         pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
  89 }
  90
  91 static void __devinit quirk_uli5288(struct pci_dev *dev)
  92 {
  93         unsigned char c;
  94         unsigned short temp;
  95
  96         /* Interrupt Disable, Needed when SATA disabled */
  97         pci_read_config_word(dev, PCI_COMMAND, &temp);
  98         temp |= 1<<10;
  99         pci_write_config_word(dev, PCI_COMMAND, temp);
 100
 101         pci_read_config_byte(dev, 0x83, &c);
 102         c |= 0x80;
 103         pci_write_config_byte(dev, 0x83, c);
 104
 105         pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
 106         pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
 107
 108         pci_read_config_byte(dev, 0x83, &c);
 109         c &= 0x7f;
 110         pci_write_config_byte(dev, 0x83, c);
 111 }
 112
 113 /*
 114  * Since 8259PIC was disabled on the board, the IDE device can not
 115  * use the legacy IRQ, we need to let the IDE device work under
 116  * native mode and use the interrupt line like other PCI devices.
 117  * IRQ14 is a sideband interrupt from IDE device to CPU and we use this
 118  * as the interrupt for IDE device.
 119  */
 120 static void __devinit quirk_uli5229(struct pci_dev *dev)
 121 {
 122         unsigned char c;
 123
 124         pci_read_config_byte(dev, 0x4b, &c);
 125         c |= 0x10;
 126         pci_write_config_byte(dev, 0x4b, c);
 127 }
 128
 129 /*
 130  * SATA interrupt pin bug fix
 131  * There's a chip bug for 5288, The interrupt pin should be 2,
 132  * not the read only value 1, So it use INTB#, not INTA# which
 133  * actually used by the IDE device 5229.
 134  * As of this bug, during the PCI initialization, 5288 read the
 135  * irq of IDE device from the device tree, this function fix this
 136  * bug by re-assigning a correct irq to 5288.
 137  *
 138  */
 139 static void __devinit final_uli5288(struct pci_dev *dev)
 140 {
 141         struct pci_controller *hose = pci_bus_to_host(dev->bus);
 142         struct device_node *hosenode = hose ? hose->dn : NULL;
 143         struct of_irq oirq;
 144         int virq, pin = 2;
 145         u32 laddr[3];
 146
 147         if (!hosenode)
 148                 return;
 149
 150         laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
 151         laddr[1] = laddr[2] = 0;
 152         of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
 153         virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
 154                                      oirq.size);
 155         dev->irq = virq;
 156 }
 157
 158 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
 159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
 160 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
 161 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, final_uli5288);
 162 #endif /* CONFIG_PCI */
 163
 164 static void __init
 165 mpc86xx_hpcd_setup_arch(void)
 166 {
 167 #ifdef CONFIG_PCI
 168         struct device_node *np;
 169 #endif
 170         if (ppc_md.progress)
 171                 ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);
 172
 173 #ifdef CONFIG_PCI
 174         for_each_node_by_type(np, "pci") {
 175                 if (of_device_is_compatible(np, "fsl,mpc8610-pci")
 176                     || of_device_is_compatible(np, "fsl,mpc8641-pcie")) {
 177                         struct resource rsrc;
 178                         of_address_to_resource(np, 0, &rsrc);
 179                         if ((rsrc.start & 0xfffff) == 0xa000)
 180                                 fsl_add_bridge(np, 1);
 181                         else
 182                                 fsl_add_bridge(np, 0);
 183                 }
 184         }
 185 #endif
 186
 187         printk("MPC86xx HPCD board from Freescale Semiconductor\n");
 188 }
 189
 190 /*
 191  * Called very early, device-tree isn't unflattened
 192  */
 193 static int __init mpc86xx_hpcd_probe(void)
 194 {
 195         unsigned long root = of_get_flat_dt_root();
 196
 197         if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
 198                 return 1;       /* Looks good */
 199
 200         return 0;
 201 }
 202
 203 long __init
 204 mpc86xx_time_init(void)
 205 {
 206         unsigned int temp;
 207
 208         /* Set the time base to zero */
 209         mtspr(SPRN_TBWL, 0);
 210         mtspr(SPRN_TBWU, 0);
 211
 212         temp = mfspr(SPRN_HID0);
 213         temp |= HID0_TBEN;
 214         mtspr(SPRN_HID0, temp);
 215         asm volatile("isync");
 216
 217         return 0;
 218 }
 219
 220 define_machine(mpc86xx_hpcd) {
 221         .name                   = "MPC86xx HPCD",
 222         .probe                  = mpc86xx_hpcd_probe,
 223         .setup_arch             = mpc86xx_hpcd_setup_arch,
 224         .init_IRQ               = mpc86xx_hpcd_init_irq,
 225         .get_irq                = mpic_get_irq,
 226         .restart                = fsl_rstcr_restart,
 227         .time_init              = mpc86xx_time_init,
 228         .calibrate_decr         = generic_calibrate_decr,
 229         .progress               = udbg_progress,
 230         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 231 };