Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-ixp2000/ixdp2800.c |
| 3 | * |
| 4 | * IXDP2800 platform support |
| 5 | * |
| 6 | * Original Author: Jeffrey Daly <jeffrey.daly@intel.com> |
| 7 | * Maintainer: Deepak Saxena <dsaxena@plexity.net> |
| 8 | * |
| 9 | * Copyright (C) 2002 Intel Corp. |
| 10 | * Copyright (C) 2003-2004 MontaVista Software, 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/kernel.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/mm.h> |
| 20 | #include <linux/sched.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/device.h> |
| 23 | #include <linux/bitops.h> |
| 24 | #include <linux/pci.h> |
| 25 | #include <linux/ioport.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/delay.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 28 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/irq.h> |
| 31 | #include <asm/pgtable.h> |
| 32 | #include <asm/page.h> |
| 33 | #include <asm/system.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 34 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/mach-types.h> |
| 36 | |
| 37 | #include <asm/mach/pci.h> |
| 38 | #include <asm/mach/map.h> |
| 39 | #include <asm/mach/irq.h> |
| 40 | #include <asm/mach/time.h> |
| 41 | #include <asm/mach/flash.h> |
| 42 | #include <asm/mach/arch.h> |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /************************************************************************* |
| 45 | * IXDP2800 timer tick |
| 46 | *************************************************************************/ |
| 47 | |
| 48 | static void __init ixdp2800_timer_init(void) |
| 49 | { |
| 50 | ixp2000_init_time(50000000); |
| 51 | } |
| 52 | |
| 53 | static struct sys_timer ixdp2800_timer = { |
| 54 | .init = ixdp2800_timer_init, |
| 55 | .offset = ixp2000_gettimeoffset, |
| 56 | }; |
| 57 | |
| 58 | /************************************************************************* |
| 59 | * IXDP2800 PCI |
| 60 | *************************************************************************/ |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 61 | static void __init ixdp2800_slave_disable_pci_master(void) |
| 62 | { |
| 63 | *IXP2000_PCI_CMDSTAT &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); |
| 64 | } |
| 65 | |
| 66 | static void __init ixdp2800_master_wait_for_slave(void) |
| 67 | { |
| 68 | volatile u32 *addr; |
| 69 | |
| 70 | printk(KERN_INFO "IXDP2800: waiting for slave NPU to configure " |
| 71 | "its BAR sizes\n"); |
| 72 | |
| 73 | addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, |
| 74 | PCI_BASE_ADDRESS_1); |
| 75 | do { |
| 76 | *addr = 0xffffffff; |
| 77 | cpu_relax(); |
| 78 | } while (*addr != 0xfe000008); |
| 79 | |
| 80 | addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, |
| 81 | PCI_BASE_ADDRESS_2); |
| 82 | do { |
| 83 | *addr = 0xffffffff; |
| 84 | cpu_relax(); |
| 85 | } while (*addr != 0xc0000008); |
| 86 | |
| 87 | /* |
| 88 | * Configure the slave's SDRAM BAR by hand. |
| 89 | */ |
| 90 | *addr = 0x40000008; |
| 91 | } |
| 92 | |
| 93 | static void __init ixdp2800_slave_wait_for_master_enable(void) |
| 94 | { |
| 95 | printk(KERN_INFO "IXDP2800: waiting for master NPU to enable us\n"); |
| 96 | |
| 97 | while ((*IXP2000_PCI_CMDSTAT & PCI_COMMAND_MASTER) == 0) |
| 98 | cpu_relax(); |
| 99 | } |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | void __init ixdp2800_pci_preinit(void) |
| 102 | { |
| 103 | printk("ixdp2x00_pci_preinit called\n"); |
| 104 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 105 | *IXP2000_PCI_ADDR_EXT = 0x0001e000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 107 | if (!ixdp2x00_master_npu()) |
| 108 | ixdp2800_slave_disable_pci_master(); |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | *IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff; |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 111 | *IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | ixp2000_pci_preinit(); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 114 | |
| 115 | if (ixdp2x00_master_npu()) { |
| 116 | /* |
| 117 | * Wait until the slave set its SRAM/SDRAM BAR sizes |
| 118 | * correctly before we proceed to scan and enumerate |
| 119 | * the bus. |
| 120 | */ |
| 121 | ixdp2800_master_wait_for_slave(); |
| 122 | |
| 123 | /* |
| 124 | * We configure the SDRAM BARs by hand because they |
| 125 | * are 1G and fall outside of the regular allocated |
| 126 | * PCI address space. |
| 127 | */ |
| 128 | *IXP2000_PCI_SDRAM_BAR = 0x00000008; |
| 129 | } else { |
| 130 | /* |
| 131 | * Wait for the master to complete scanning the bus |
| 132 | * and assigning resources before we proceed to scan |
| 133 | * the bus ourselves. Set pci=firmware to honor the |
| 134 | * master's resource assignment. |
| 135 | */ |
| 136 | ixdp2800_slave_wait_for_master_enable(); |
| 137 | pcibios_setup("firmware"); |
| 138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 141 | /* |
| 142 | * We assign the SDRAM BARs for the two IXP2800 CPUs by hand, outside |
| 143 | * of the regular PCI window, because there's only 512M of outbound PCI |
| 144 | * memory window on each IXP, while we need 1G for each of the BARs. |
| 145 | */ |
| 146 | static void __devinit ixp2800_pci_fixup(struct pci_dev *dev) |
| 147 | { |
| 148 | if (machine_is_ixdp2800()) { |
| 149 | dev->resource[2].start = 0; |
| 150 | dev->resource[2].end = 0; |
| 151 | dev->resource[2].flags = 0; |
| 152 | } |
| 153 | } |
| 154 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IXP2800, ixp2800_pci_fixup); |
| 155 | |
| 156 | static int __init ixdp2800_pci_setup(int nr, struct pci_sys_data *sys) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
| 158 | sys->mem_offset = 0x00000000; |
| 159 | |
| 160 | ixp2000_pci_setup(nr, sys); |
| 161 | |
| 162 | return 1; |
| 163 | } |
| 164 | |
| 165 | static int __init ixdp2800_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 166 | { |
| 167 | if (ixdp2x00_master_npu()) { |
| 168 | |
| 169 | /* |
| 170 | * Root bus devices. Slave NPU is only one with interrupt. |
| 171 | * Everything else, we just return -1 which is invalid. |
| 172 | */ |
| 173 | if(!dev->bus->self) { |
| 174 | if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN ) |
| 175 | return IRQ_IXDP2800_INGRESS_NPU; |
| 176 | |
| 177 | return -1; |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * Bridge behind the PMC slot. |
| 182 | */ |
| 183 | if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN && |
| 184 | dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN && |
| 185 | !dev->bus->parent->self->bus->parent) |
| 186 | return IRQ_IXDP2800_PMC; |
| 187 | |
| 188 | /* |
| 189 | * Device behind the first bridge |
| 190 | */ |
| 191 | if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) { |
| 192 | switch(dev->devfn) { |
| 193 | case IXDP2X00_PMC_DEVFN: |
| 194 | return IRQ_IXDP2800_PMC; |
| 195 | |
| 196 | case IXDP2800_MASTER_ENET_DEVFN: |
| 197 | return IRQ_IXDP2800_EGRESS_ENET; |
| 198 | |
| 199 | case IXDP2800_SWITCH_FABRIC_DEVFN: |
| 200 | return IRQ_IXDP2800_FABRIC; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | return -1; |
| 205 | } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */ |
| 206 | } |
| 207 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 208 | static void __init ixdp2800_master_enable_slave(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 210 | volatile u32 *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 212 | printk(KERN_INFO "IXDP2800: enabling slave NPU\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 214 | addr = (volatile u32 *)ixp2000_pci_config_addr(0, |
| 215 | IXDP2X00_SLAVE_NPU_DEVFN, |
| 216 | PCI_COMMAND); |
| 217 | |
| 218 | *addr |= PCI_COMMAND_MASTER; |
| 219 | } |
| 220 | |
| 221 | static void __init ixdp2800_master_wait_for_slave_bus_scan(void) |
| 222 | { |
| 223 | volatile u32 *addr; |
| 224 | |
| 225 | printk(KERN_INFO "IXDP2800: waiting for slave to finish bus scan\n"); |
| 226 | |
| 227 | addr = (volatile u32 *)ixp2000_pci_config_addr(0, |
| 228 | IXDP2X00_SLAVE_NPU_DEVFN, |
| 229 | PCI_COMMAND); |
| 230 | while ((*addr & PCI_COMMAND_MEMORY) == 0) |
| 231 | cpu_relax(); |
| 232 | } |
| 233 | |
| 234 | static void __init ixdp2800_slave_signal_bus_scan_completion(void) |
| 235 | { |
| 236 | printk(KERN_INFO "IXDP2800: bus scan done, signaling master\n"); |
| 237 | *IXP2000_PCI_CMDSTAT |= PCI_COMMAND_MEMORY; |
| 238 | } |
| 239 | |
| 240 | static void __init ixdp2800_pci_postinit(void) |
| 241 | { |
| 242 | if (!ixdp2x00_master_npu()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | ixdp2x00_slave_pci_postinit(); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 244 | ixdp2800_slave_signal_bus_scan_completion(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 248 | struct __initdata hw_pci ixdp2800_pci __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | .nr_controllers = 1, |
| 250 | .setup = ixdp2800_pci_setup, |
| 251 | .preinit = ixdp2800_pci_preinit, |
| 252 | .postinit = ixdp2800_pci_postinit, |
| 253 | .scan = ixp2000_pci_scan_bus, |
| 254 | .map_irq = ixdp2800_pci_map_irq, |
| 255 | }; |
| 256 | |
| 257 | int __init ixdp2800_pci_init(void) |
| 258 | { |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 259 | if (machine_is_ixdp2800()) { |
| 260 | struct pci_dev *dev; |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | pci_common_init(&ixdp2800_pci); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 263 | if (ixdp2x00_master_npu()) { |
Alan Cox | 7281c24 | 2006-10-16 16:49:50 +0100 | [diff] [blame] | 264 | dev = pci_get_bus_and_slot(1, IXDP2800_SLAVE_ENET_DEVFN); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 265 | pci_remove_bus_device(dev); |
Alan Cox | 7281c24 | 2006-10-16 16:49:50 +0100 | [diff] [blame] | 266 | pci_dev_put(dev); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 267 | |
| 268 | ixdp2800_master_enable_slave(); |
| 269 | ixdp2800_master_wait_for_slave_bus_scan(); |
| 270 | } else { |
Alan Cox | 7281c24 | 2006-10-16 16:49:50 +0100 | [diff] [blame] | 271 | dev = pci_get_bus_and_slot(1, IXDP2800_MASTER_ENET_DEVFN); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 272 | pci_remove_bus_device(dev); |
Alan Cox | 7281c24 | 2006-10-16 16:49:50 +0100 | [diff] [blame] | 273 | pci_dev_put(dev); |
Lennert Buytenhek | 53e173f | 2005-04-29 22:13:57 +0100 | [diff] [blame] | 274 | } |
| 275 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | subsys_initcall(ixdp2800_pci_init); |
| 281 | |
Russell King | cdea460 | 2007-05-30 17:48:45 +0100 | [diff] [blame] | 282 | void __init ixdp2800_init_irq(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
| 284 | ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS); |
| 285 | } |
| 286 | |
| 287 | MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform") |
Russell King | e9dea0c | 2005-07-03 17:38:58 +0100 | [diff] [blame] | 288 | /* Maintainer: MontaVista Software, Inc. */ |
Russell King | e9dea0c | 2005-07-03 17:38:58 +0100 | [diff] [blame] | 289 | .phys_io = IXP2000_UART_PHYS_BASE, |
| 290 | .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, |
| 291 | .boot_params = 0x00000100, |
| 292 | .map_io = ixdp2x00_map_io, |
| 293 | .init_irq = ixdp2800_init_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | .timer = &ixdp2800_timer, |
Russell King | e9dea0c | 2005-07-03 17:38:58 +0100 | [diff] [blame] | 295 | .init_machine = ixdp2x00_init_machine, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | MACHINE_END |
| 297 | |