release/src-rt-6.x/linux/linux-2.6/arch/mips/pci/fixup-vr4133.c

   1 /*
   2  * arch/mips/pci/fixup-vr4133.c
   3  *
   4  * The NEC CMB-VR4133 Board specific PCI fixups.
   5  *
   6  * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com> and
   7  *         Alex Sapkov <asapkov@ru.mvista.com>
   8  *
   9  * 2003-2004 (c) MontaVista, Software, Inc. This file is licensed under
  10  * the terms of the GNU General Public License version 2. This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  *
  14  * Modified for support in 2.6
  15  * Author: Manish Lachwani (mlachwani@mvista.com)
  16  *
  17  */
  18 #include <linux/init.h>
  19 #include <linux/pci.h>
  20 #include <linux/kernel.h>
  21
  22 #include <asm/io.h>
  23 #include <asm/i8259.h>
  24 #include <asm/vr41xx/cmbvr4133.h>
  25
  26 extern int vr4133_rockhopper;
  27 extern void ali_m1535plus_init(struct pci_dev *dev);
  28 extern void ali_m5229_init(struct pci_dev *dev);
  29
  30 /* Do platform specific device initialization at pci_enable_device() time */
  31 int pcibios_plat_dev_init(struct pci_dev *dev)
  32 {
  33         /*
  34          * We have to reset AMD PCnet adapter on Rockhopper since
  35          * PMON leaves it enabled and generating interrupts. This leads
  36          * to a lock if some PCI device driver later enables the IRQ line
  37          * shared with PCnet and there is no AMD PCnet driver to catch its
  38          * interrupts.
  39          */
  40 #ifdef CONFIG_ROCKHOPPER
  41         if (dev->vendor == PCI_VENDOR_ID_AMD &&
  42                 dev->device == PCI_DEVICE_ID_AMD_LANCE) {
  43                 inl(pci_resource_start(dev, 0) + 0x18);
  44         }
  45 #endif
  46
  47         /*
  48          * we have to open the bridges' windows down to 0 because otherwise
  49          * we cannot access ISA south bridge I/O registers that get mapped from
  50          * 0. for example, 8259 PIC would be unaccessible without that
  51          */
  52         if(dev->vendor == PCI_VENDOR_ID_INTEL && dev->device == PCI_DEVICE_ID_INTEL_S21152BB) {
  53                 pci_write_config_byte(dev, PCI_IO_BASE, 0);
  54                 if(dev->bus->number == 0) {
  55                         pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0);
  56                 } else {
  57                         pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 1);
  58                 }
  59         }
  60
  61         return 0;
  62 }
  63
  64 /*
  65  * M1535 IRQ mapping
  66  * Feel free to change this, although it shouldn't be needed
  67  */
  68 #define M1535_IRQ_INTA  7
  69 #define M1535_IRQ_INTB  9
  70 #define M1535_IRQ_INTC  10
  71 #define M1535_IRQ_INTD  11
  72
  73 #define M1535_IRQ_USB   9
  74 #define M1535_IRQ_IDE   14
  75 #define M1535_IRQ_IDE2  15
  76 #define M1535_IRQ_PS2   12
  77 #define M1535_IRQ_RTC   8
  78 #define M1535_IRQ_FDC   6
  79 #define M1535_IRQ_AUDIO 5
  80 #define M1535_IRQ_COM1  4
  81 #define M1535_IRQ_COM2  4
  82 #define M1535_IRQ_IRDA  3
  83 #define M1535_IRQ_KBD   1
  84 #define M1535_IRQ_TMR   0
  85
  86 /* Rockhopper "slots" assignment; this is hard-coded ... */
  87 #define ROCKHOPPER_M5451_SLOT  1
  88 #define ROCKHOPPER_M1535_SLOT  2
  89 #define ROCKHOPPER_M5229_SLOT  11
  90 #define ROCKHOPPER_M5237_SLOT  15
  91 #define ROCKHOPPER_PMU_SLOT    12
  92 /* ... and hard-wired. */
  93 #define ROCKHOPPER_PCI1_SLOT   3
  94 #define ROCKHOPPER_PCI2_SLOT   4
  95 #define ROCKHOPPER_PCI3_SLOT   5
  96 #define ROCKHOPPER_PCI4_SLOT   6
  97 #define ROCKHOPPER_PCNET_SLOT  1
  98
  99 #define M1535_IRQ_MASK(n) (1 << (n))
 100
 101 #define M1535_IRQ_EDGE  (M1535_IRQ_MASK(M1535_IRQ_TMR)  | \
 102                          M1535_IRQ_MASK(M1535_IRQ_KBD)  | \
 103                          M1535_IRQ_MASK(M1535_IRQ_COM1) | \
 104                          M1535_IRQ_MASK(M1535_IRQ_COM2) | \
 105                          M1535_IRQ_MASK(M1535_IRQ_IRDA) | \
 106                          M1535_IRQ_MASK(M1535_IRQ_RTC)  | \
 107                          M1535_IRQ_MASK(M1535_IRQ_FDC)  | \
 108                          M1535_IRQ_MASK(M1535_IRQ_PS2))
 109
 110 #define M1535_IRQ_LEVEL (M1535_IRQ_MASK(M1535_IRQ_IDE)  | \
 111                          M1535_IRQ_MASK(M1535_IRQ_USB)  | \
 112                          M1535_IRQ_MASK(M1535_IRQ_INTA) | \
 113                          M1535_IRQ_MASK(M1535_IRQ_INTB) | \
 114                          M1535_IRQ_MASK(M1535_IRQ_INTC) | \
 115                          M1535_IRQ_MASK(M1535_IRQ_INTD))
 116
 117 struct irq_map_entry {
 118         u16 bus;
 119         u8 slot;
 120         u8 irq;
 121 };
 122 static struct irq_map_entry int_map[] = {
 123         {1, ROCKHOPPER_M5451_SLOT, M1535_IRQ_AUDIO},    /* Audio controller */
 124         {1, ROCKHOPPER_PCI1_SLOT, M1535_IRQ_INTD},      /* PCI slot #1 */
 125         {1, ROCKHOPPER_PCI2_SLOT, M1535_IRQ_INTC},      /* PCI slot #2 */
 126         {1, ROCKHOPPER_M5237_SLOT, M1535_IRQ_USB},      /* USB host controller */
 127         {1, ROCKHOPPER_M5229_SLOT, IDE_PRIMARY_IRQ},    /* IDE controller */
 128         {2, ROCKHOPPER_PCNET_SLOT, M1535_IRQ_INTD},     /* AMD Am79c973 on-board
 129                                                            ethernet */
 130         {2, ROCKHOPPER_PCI3_SLOT, M1535_IRQ_INTB},      /* PCI slot #3 */
 131         {2, ROCKHOPPER_PCI4_SLOT, M1535_IRQ_INTC}       /* PCI slot #4 */
 132 };
 133
 134 static int pci_intlines[] =
 135     { M1535_IRQ_INTA, M1535_IRQ_INTB, M1535_IRQ_INTC, M1535_IRQ_INTD };
 136
 137 /* Determine the Rockhopper IRQ line number for the PCI device */
 138 int rockhopper_get_irq(struct pci_dev *dev, u8 pin, u8 slot)
 139 {
 140         struct pci_bus *bus;
 141         int i;
 142
 143         bus = dev->bus;
 144         if (bus == NULL)
 145                 return -1;
 146
 147         for (i = 0; i < ARRAY_SIZE(int_map); i++) {
 148                 if (int_map[i].bus == bus->number && int_map[i].slot == slot) {
 149                         int line;
 150                         for (line = 0; line < 4; line++)
 151                                 if (pci_intlines[line] == int_map[i].irq)
 152                                         break;
 153                         if (line < 4)
 154                                 return pci_intlines[(line + (pin - 1)) % 4];
 155                         else
 156                                 return int_map[i].irq;
 157                 }
 158         }
 159         return -1;
 160 }
 161
 162 #ifdef CONFIG_ROCKHOPPER
 163 void i8259_init(void)
 164 {
 165         init_i8259_irqs();
 166
 167         outb(0x00, 0x4d0);
 168         outb(0x02, 0x4d1);      /* USB IRQ9 is level */
 169 }
 170 #endif
 171
 172 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 173 {
 174         extern int pci_probe_only;
 175         pci_probe_only = 1;
 176
 177 #ifdef CONFIG_ROCKHOPPER
 178         if( dev->bus->number == 1 && vr4133_rockhopper )  {
 179                 if(slot == ROCKHOPPER_PCI1_SLOT || slot == ROCKHOPPER_PCI2_SLOT)
 180                         dev->irq = CMBVR41XX_INTA_IRQ;
 181                 else
 182                         dev->irq = rockhopper_get_irq(dev, pin, slot);
 183         } else
 184                 dev->irq = CMBVR41XX_INTA_IRQ;
 185 #else
 186         dev->irq = CMBVR41XX_INTA_IRQ;
 187 #endif
 188
 189         return dev->irq;
 190 }
 191
 192 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, ali_m1535plus_init);
 193 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, ali_m5229_init);
 194
 195