Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/alpha/kernel/sys_ruffian.c |
| 3 | * |
| 4 | * Copyright (C) 1995 David A Rusling |
| 5 | * Copyright (C) 1996 Jay A Estabrook |
| 6 | * Copyright (C) 1998, 1999, 2000 Richard Henderson |
| 7 | * |
| 8 | * Code supporting the RUFFIAN. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/ioport.h> |
Arnd Bergmann | 08604bd | 2009-06-16 15:31:12 -0700 | [diff] [blame] | 17 | #include <linux/timex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/init.h> |
| 19 | |
| 20 | #include <asm/ptrace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <asm/dma.h> |
| 22 | #include <asm/irq.h> |
| 23 | #include <asm/mmu_context.h> |
| 24 | #include <asm/io.h> |
| 25 | #include <asm/pgtable.h> |
| 26 | #include <asm/core_cia.h> |
| 27 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include "proto.h" |
| 30 | #include "irq_impl.h" |
| 31 | #include "pci_impl.h" |
| 32 | #include "machvec_impl.h" |
| 33 | |
| 34 | |
| 35 | static void __init |
| 36 | ruffian_init_irq(void) |
| 37 | { |
| 38 | /* Invert 6&7 for i82371 */ |
| 39 | *(vulp)PYXIS_INT_HILO = 0x000000c0UL; mb(); |
| 40 | *(vulp)PYXIS_INT_CNFG = 0x00002064UL; mb(); /* all clear */ |
| 41 | |
| 42 | outb(0x11,0xA0); |
| 43 | outb(0x08,0xA1); |
| 44 | outb(0x02,0xA1); |
| 45 | outb(0x01,0xA1); |
| 46 | outb(0xFF,0xA1); |
| 47 | |
| 48 | outb(0x11,0x20); |
| 49 | outb(0x00,0x21); |
| 50 | outb(0x04,0x21); |
| 51 | outb(0x01,0x21); |
| 52 | outb(0xFF,0x21); |
| 53 | |
| 54 | /* Finish writing the 82C59A PIC Operation Control Words */ |
| 55 | outb(0x20,0xA0); |
| 56 | outb(0x20,0x20); |
| 57 | |
| 58 | init_i8259a_irqs(); |
| 59 | |
| 60 | /* Not interested in the bogus interrupts (0,3,6), |
| 61 | NMI (1), HALT (2), flash (5), or 21142 (8). */ |
| 62 | init_pyxis_irqs(0x16f0000); |
| 63 | |
| 64 | common_init_isa_dma(); |
| 65 | } |
| 66 | |
Julia Lawall | 04d8a9d | 2009-11-30 15:37:25 -0500 | [diff] [blame] | 67 | #define RUFFIAN_LATCH DIV_ROUND_CLOSEST(PIT_TICK_RATE, HZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | static void __init |
| 70 | ruffian_init_rtc(void) |
| 71 | { |
| 72 | /* Ruffian does not have the RTC connected to the CPU timer |
| 73 | interrupt. Instead, it uses the PIT connected to IRQ 0. */ |
| 74 | |
| 75 | /* Setup interval timer. */ |
| 76 | outb(0x34, 0x43); /* binary, mode 2, LSB/MSB, ch 0 */ |
| 77 | outb(RUFFIAN_LATCH & 0xff, 0x40); /* LSB */ |
| 78 | outb(RUFFIAN_LATCH >> 8, 0x40); /* MSB */ |
| 79 | |
| 80 | outb(0xb6, 0x43); /* pit counter 2: speaker */ |
| 81 | outb(0x31, 0x42); |
| 82 | outb(0x13, 0x42); |
| 83 | |
| 84 | setup_irq(0, &timer_irqaction); |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | ruffian_kill_arch (int mode) |
| 89 | { |
| 90 | cia_kill_arch(mode); |
| 91 | #if 0 |
| 92 | /* This only causes re-entry to ARCSBIOS */ |
| 93 | /* Perhaps this works for other PYXIS as well? */ |
| 94 | *(vuip) PYXIS_RESET = 0x0000dead; |
| 95 | mb(); |
| 96 | #endif |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Interrupt routing: |
| 101 | * |
| 102 | * Primary bus |
| 103 | * IdSel INTA INTB INTC INTD |
| 104 | * 21052 13 - - - - |
| 105 | * SIO 14 23 - - - |
| 106 | * 21143 15 44 - - - |
| 107 | * Slot 0 17 43 42 41 40 |
| 108 | * |
| 109 | * Secondary bus |
| 110 | * IdSel INTA INTB INTC INTD |
| 111 | * Slot 0 8 (18) 19 18 17 16 |
| 112 | * Slot 1 9 (19) 31 30 29 28 |
| 113 | * Slot 2 10 (20) 27 26 25 24 |
| 114 | * Slot 3 11 (21) 39 38 37 36 |
| 115 | * Slot 4 12 (22) 35 34 33 32 |
| 116 | * 53c875 13 (23) 20 - - - |
| 117 | * |
| 118 | */ |
| 119 | |
| 120 | static int __init |
Ralf Baechle | d534194 | 2011-06-10 15:30:21 +0100 | [diff] [blame] | 121 | ruffian_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
| 123 | static char irq_tab[11][5] __initdata = { |
| 124 | /*INT INTA INTB INTC INTD */ |
| 125 | {-1, -1, -1, -1, -1}, /* IdSel 13, 21052 */ |
| 126 | {-1, -1, -1, -1, -1}, /* IdSel 14, SIO */ |
| 127 | {44, 44, 44, 44, 44}, /* IdSel 15, 21143 */ |
| 128 | {-1, -1, -1, -1, -1}, /* IdSel 16, none */ |
| 129 | {43, 43, 42, 41, 40}, /* IdSel 17, 64-bit slot */ |
| 130 | /* the next 6 are actually on PCI bus 1, across the bridge */ |
| 131 | {19, 19, 18, 17, 16}, /* IdSel 8, slot 0 */ |
| 132 | {31, 31, 30, 29, 28}, /* IdSel 9, slot 1 */ |
| 133 | {27, 27, 26, 25, 24}, /* IdSel 10, slot 2 */ |
| 134 | {39, 39, 38, 37, 36}, /* IdSel 11, slot 3 */ |
| 135 | {35, 35, 34, 33, 32}, /* IdSel 12, slot 4 */ |
| 136 | {20, 20, 20, 20, 20}, /* IdSel 13, 53c875 */ |
| 137 | }; |
| 138 | const long min_idsel = 13, max_idsel = 23, irqs_per_slot = 5; |
| 139 | return COMMON_TABLE_LOOKUP; |
| 140 | } |
| 141 | |
| 142 | static u8 __init |
| 143 | ruffian_swizzle(struct pci_dev *dev, u8 *pinp) |
| 144 | { |
| 145 | int slot, pin = *pinp; |
| 146 | |
| 147 | if (dev->bus->number == 0) { |
| 148 | slot = PCI_SLOT(dev->devfn); |
| 149 | } |
| 150 | /* Check for the built-in bridge. */ |
| 151 | else if (PCI_SLOT(dev->bus->self->devfn) == 13) { |
| 152 | slot = PCI_SLOT(dev->devfn) + 10; |
| 153 | } |
| 154 | else |
| 155 | { |
| 156 | /* Must be a card-based bridge. */ |
| 157 | do { |
| 158 | if (PCI_SLOT(dev->bus->self->devfn) == 13) { |
| 159 | slot = PCI_SLOT(dev->devfn) + 10; |
| 160 | break; |
| 161 | } |
Bjorn Helgaas | 1be9baa | 2008-12-09 16:12:07 -0700 | [diff] [blame] | 162 | pin = pci_swizzle_interrupt_pin(dev, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | /* Move up the chain of bridges. */ |
| 165 | dev = dev->bus->self; |
| 166 | /* Slot of the next bridge. */ |
| 167 | slot = PCI_SLOT(dev->devfn); |
| 168 | } while (dev->bus->self); |
| 169 | } |
| 170 | *pinp = pin; |
| 171 | return slot; |
| 172 | } |
| 173 | |
| 174 | #ifdef BUILDING_FOR_MILO |
| 175 | /* |
| 176 | * The DeskStation Ruffian motherboard firmware does not place |
| 177 | * the memory size in the PALimpure area. Therefore, we use |
| 178 | * the Bank Configuration Registers in PYXIS to obtain the size. |
| 179 | */ |
| 180 | static unsigned long __init |
| 181 | ruffian_get_bank_size(unsigned long offset) |
| 182 | { |
| 183 | unsigned long bank_addr, bank, ret = 0; |
Tobias Klauser | 25c8716 | 2006-07-30 03:03:23 -0700 | [diff] [blame] | 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | /* Valid offsets are: 0x800, 0x840 and 0x880 |
| 186 | since Ruffian only uses three banks. */ |
| 187 | bank_addr = (unsigned long)PYXIS_MCR + offset; |
| 188 | bank = *(vulp)bank_addr; |
Tobias Klauser | 25c8716 | 2006-07-30 03:03:23 -0700 | [diff] [blame] | 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | /* Check BANK_ENABLE */ |
| 191 | if (bank & 0x01) { |
| 192 | static unsigned long size[] __initdata = { |
Tobias Klauser | 25c8716 | 2006-07-30 03:03:23 -0700 | [diff] [blame] | 193 | 0x40000000UL, /* 0x00, 1G */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | 0x20000000UL, /* 0x02, 512M */ |
| 195 | 0x10000000UL, /* 0x04, 256M */ |
| 196 | 0x08000000UL, /* 0x06, 128M */ |
| 197 | 0x04000000UL, /* 0x08, 64M */ |
| 198 | 0x02000000UL, /* 0x0a, 32M */ |
| 199 | 0x01000000UL, /* 0x0c, 16M */ |
| 200 | 0x00800000UL, /* 0x0e, 8M */ |
| 201 | 0x80000000UL, /* 0x10, 2G */ |
| 202 | }; |
| 203 | |
| 204 | bank = (bank & 0x1e) >> 1; |
Tobias Klauser | 25c8716 | 2006-07-30 03:03:23 -0700 | [diff] [blame] | 205 | if (bank < ARRAY_SIZE(size)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | ret = size[bank]; |
| 207 | } |
| 208 | |
| 209 | return ret; |
| 210 | } |
| 211 | #endif /* BUILDING_FOR_MILO */ |
| 212 | |
| 213 | /* |
| 214 | * The System Vector |
| 215 | */ |
| 216 | |
| 217 | struct alpha_machine_vector ruffian_mv __initmv = { |
| 218 | .vector_name = "Ruffian", |
| 219 | DO_EV5_MMU, |
| 220 | DO_DEFAULT_RTC, |
| 221 | DO_PYXIS_IO, |
| 222 | .machine_check = cia_machine_check, |
| 223 | .max_isa_dma_address = ALPHA_RUFFIAN_MAX_ISA_DMA_ADDRESS, |
| 224 | .min_io_address = DEFAULT_IO_BASE, |
| 225 | .min_mem_address = DEFAULT_MEM_BASE, |
| 226 | .pci_dac_offset = PYXIS_DAC_OFFSET, |
| 227 | |
| 228 | .nr_irqs = 48, |
| 229 | .device_interrupt = pyxis_device_interrupt, |
| 230 | |
| 231 | .init_arch = pyxis_init_arch, |
| 232 | .init_irq = ruffian_init_irq, |
| 233 | .init_rtc = ruffian_init_rtc, |
| 234 | .init_pci = cia_init_pci, |
| 235 | .kill_arch = ruffian_kill_arch, |
| 236 | .pci_map_irq = ruffian_map_irq, |
| 237 | .pci_swizzle = ruffian_swizzle, |
| 238 | }; |
| 239 | ALIAS_MV(ruffian) |