arch/mips/pci/fixup-vr4133.c

   1 /*
   2  * arch/mips/vr41xx/nec-cmbvr4133/pci_fixup.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/config.h>
  19 #include <linux/init.h>
  20 #include <linux/pci.h>
  21
  22 #include <asm/io.h>
  23 #include <asm/vr41xx/cmbvr4133.h>
  24
  25 extern int vr4133_rockhopper;
  26 extern void ali_m1535plus_init(struct pci_dev *dev);
  27 extern void ali_m5229_init(struct pci_dev *dev);
  28
  29 /* Do platform specific device initialization at pci_enable_device() time */
  30 int pcibios_plat_dev_init(struct pci_dev *dev)
  31 {
  32         /*
  33          * We have to reset AMD PCnet adapter on Rockhopper since
  34          * PMON leaves it enabled and generating interrupts. This leads
  35          * to a lock if some PCI device driver later enables the IRQ line
  36          * shared with PCnet and there is no AMD PCnet driver to catch its
  37          * interrupts.
  38          */
  39 #ifdef CONFIG_ROCKHOPPER
  40         if (dev->vendor == PCI_VENDOR_ID_AMD &&
  41                 dev->device == PCI_DEVICE_ID_AMD_LANCE) {
  42                 inl(pci_resource_start(dev, 0) + 0x18);
  43         }
  44 #endif
  45
  46         /*
  47          * we have to open the bridges' windows down to 0 because otherwise
  48          * we cannot access ISA south bridge I/O registers that get mapped from
  49          * 0. for example, 8259 PIC would be unaccessible without that
  50          */
  51         if(dev->vendor == PCI_VENDOR_ID_INTEL && dev->device == PCI_DEVICE_ID_INTEL_S21152BB) {
  52                 pci_write_config_byte(dev, PCI_IO_BASE, 0);
  53                 if(dev->bus->number == 0) {
  54                         pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0);
  55                 } else {
  56                         pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 1);
  57                 }
  58         }
  59
  60         return 0;
  61 }
  62
  63 /*
  64  * M1535 IRQ mapping
  65  * Feel free to change this, although it shouldn't be needed
  66  */
  67 #define M1535_IRQ_INTA  7
  68 #define M1535_IRQ_INTB  9
  69 #define M1535_IRQ_INTC  10
  70 #define M1535_IRQ_INTD  11
  71
  72 #define M1535_IRQ_USB   9
  73 #define M1535_IRQ_IDE   14
  74 #define M1535_IRQ_IDE2  15
  75 #define M1535_IRQ_PS2   12
  76 #define M1535_IRQ_RTC   8
  77 #define M1535_IRQ_FDC   6
  78 #define M1535_IRQ_AUDIO 5
  79 #define M1535_IRQ_COM1  4
  80 #define M1535_IRQ_COM2  4
  81 #define M1535_IRQ_IRDA  3
  82 #define M1535_IRQ_KBD   1
  83 #define M1535_IRQ_TMR   0
  84
  85 /* Rockhopper "slots" assignment; this is hard-coded ... */
  86 #define ROCKHOPPER_M5451_SLOT  1
  87 #define ROCKHOPPER_M1535_SLOT  2
  88 #define ROCKHOPPER_M5229_SLOT  11
  89 #define ROCKHOPPER_M5237_SLOT  15
  90 #define ROCKHOPPER_PMU_SLOT    12
  91 /* ... and hard-wired. */
  92 #define ROCKHOPPER_PCI1_SLOT   3
  93 #define ROCKHOPPER_PCI2_SLOT   4
  94 #define ROCKHOPPER_PCI3_SLOT   5
  95 #define ROCKHOPPER_PCI4_SLOT   6
  96 #define ROCKHOPPER_PCNET_SLOT  1
  97
  98 #define M1535_IRQ_MASK(n) (1 << (n))
  99
 100 #define M1535_IRQ_EDGE  (M1535_IRQ_MASK(M1535_IRQ_TMR)  | \
 101                          M1535_IRQ_MASK(M1535_IRQ_KBD)  | \
 102                          M1535_IRQ_MASK(M1535_IRQ_COM1) | \
 103                          M1535_IRQ_MASK(M1535_IRQ_COM2) | \
 104                          M1535_IRQ_MASK(M1535_IRQ_IRDA) | \
 105                          M1535_IRQ_MASK(M1535_IRQ_RTC)  | \
 106                          M1535_IRQ_MASK(M1535_IRQ_FDC)  | \
 107                          M1535_IRQ_MASK(M1535_IRQ_PS2))
 108
 109 #define M1535_IRQ_LEVEL (M1535_IRQ_MASK(M1535_IRQ_IDE)  | \
 110                          M1535_IRQ_MASK(M1535_IRQ_USB)  | \
 111                          M1535_IRQ_MASK(M1535_IRQ_INTA) | \
 112                          M1535_IRQ_MASK(M1535_IRQ_INTB) | \
 113                          M1535_IRQ_MASK(M1535_IRQ_INTC) | \
 114                          M1535_IRQ_MASK(M1535_IRQ_INTD))
 115
 116 struct irq_map_entry {
 117         u16 bus;
 118         u8 slot;
 119         u8 irq;
 120 };
 121 static struct irq_map_entry int_map[] = {
 122         {1, ROCKHOPPER_M5451_SLOT, M1535_IRQ_AUDIO},    /* Audio controller */
 123         {1, ROCKHOPPER_PCI1_SLOT, M1535_IRQ_INTD},      /* PCI slot #1 */
 124         {1, ROCKHOPPER_PCI2_SLOT, M1535_IRQ_INTC},      /* PCI slot #2 */
 125         {1, ROCKHOPPER_M5237_SLOT, M1535_IRQ_USB},      /* USB host controller */
 126         {1, ROCKHOPPER_M5229_SLOT, IDE_PRIMARY_IRQ},    /* IDE controller */
 127         {2, ROCKHOPPER_PCNET_SLOT, M1535_IRQ_INTD},     /* AMD Am79c973 on-board
 128                                                            ethernet */
 129         {2, ROCKHOPPER_PCI3_SLOT, M1535_IRQ_INTB},      /* PCI slot #3 */
 130         {2, ROCKHOPPER_PCI4_SLOT, M1535_IRQ_INTC}       /* PCI slot #4 */
 131 };
 132
 133 static int pci_intlines[] =
 134     { M1535_IRQ_INTA, M1535_IRQ_INTB, M1535_IRQ_INTC, M1535_IRQ_INTD };
 135
 136 /* Determine the Rockhopper IRQ line number for the PCI device */
 137 int rockhopper_get_irq(struct pci_dev *dev, u8 pin, u8 slot)
 138 {
 139         struct pci_bus *bus;
 140         int i;
 141
 142         bus = dev->bus;
 143         if (bus == NULL)
 144                 return -1;
 145
 146         for (i = 0; i < sizeof (int_map) / sizeof (int_map[0]); i++) {
 147                 if (int_map[i].bus == bus->number && int_map[i].slot == slot) {
 148                         int line;
 149                         for (line = 0; line < 4; line++)
 150                                 if (pci_intlines[line] == int_map[i].irq)
 151                                         break;
 152                         if (line < 4)
 153                                 return pci_intlines[(line + (pin - 1)) % 4];
 154                         else
 155                                 return int_map[i].irq;
 156                 }
 157         }
 158         return -1;
 159 }
 160
 161 #ifdef CONFIG_ROCKHOPPER
 162 void i8259_init(void)
 163 {
 164         outb(0x11, 0x20);               /* Master ICW1 */
 165         outb(I8259_IRQ_BASE, 0x21);     /* Master ICW2 */
 166         outb(0x04, 0x21);               /* Master ICW3 */
 167         outb(0x01, 0x21);               /* Master ICW4 */
 168         outb(0xff, 0x21);               /* Master IMW */
 169
 170         outb(0x11, 0xa0);               /* Slave ICW1 */
 171         outb(I8259_IRQ_BASE + 8, 0xa1); /* Slave ICW2 */
 172         outb(0x02, 0xa1);               /* Slave ICW3 */
 173         outb(0x01, 0xa1);               /* Slave ICW4 */
 174         outb(0xff, 0xa1);               /* Slave IMW */
 175
 176         outb(0x00, 0x4d0);
 177         outb(0x02, 0x4d1);      /* USB IRQ9 is level */
 178 }
 179 #endif
 180
 181 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 182 {
 183         extern int pci_probe_only;
 184         pci_probe_only = 1;
 185
 186 #ifdef CONFIG_ROCKHOPPER
 187         if( dev->bus->number == 1 && vr4133_rockhopper )  {
 188                 if(slot == ROCKHOPPER_PCI1_SLOT || slot == ROCKHOPPER_PCI2_SLOT)
 189                         dev->irq = CMBVR41XX_INTA_IRQ;
 190                 else
 191                         dev->irq = rockhopper_get_irq(dev, pin, slot);
 192         } else
 193                 dev->irq = CMBVR41XX_INTA_IRQ;
 194 #else
 195         dev->irq = CMBVR41XX_INTA_IRQ;
 196 #endif
 197
 198         return dev->irq;
 199 }
 200
 201 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, ali_m1535plus_init);
 202 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, ali_m5229_init);
 203
 204