2 * arch/arm/mach-ixp2000/ixdp2800.c
4 * IXDP2800 platform support
6 * Original Author: Jeffrey Daly <jeffrey.daly@intel.com>
7 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
9 * Copyright (C) 2002 Intel Corp.
10 * Copyright (C) 2003-2004 MontaVista Software, Inc.
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.
17 #include <linux/kernel.h>
18 #include <linux/init.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/delay.h>
30 #include <asm/pgtable.h>
32 #include <mach/hardware.h>
33 #include <asm/mach-types.h>
35 #include <asm/mach/pci.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/irq.h>
38 #include <asm/mach/time.h>
39 #include <asm/mach/flash.h>
40 #include <asm/mach/arch.h>
42 /*************************************************************************
44 *************************************************************************/
46 static void __init ixdp2800_timer_init(void)
48 ixp2000_init_time(50000000);
51 static struct sys_timer ixdp2800_timer = {
52 .init = ixdp2800_timer_init,
53 .offset = ixp2000_gettimeoffset,
56 /*************************************************************************
58 *************************************************************************/
59 static void __init ixdp2800_slave_disable_pci_master(void)
61 *IXP2000_PCI_CMDSTAT &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
64 static void __init ixdp2800_master_wait_for_slave(void)
68 printk(KERN_INFO "IXDP2800: waiting for slave NPU to configure "
71 addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN,
76 } while (*addr != 0xfe000008);
78 addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN,
83 } while (*addr != 0xc0000008);
86 * Configure the slave's SDRAM BAR by hand.
91 static void __init ixdp2800_slave_wait_for_master_enable(void)
93 printk(KERN_INFO "IXDP2800: waiting for master NPU to enable us\n");
95 while ((*IXP2000_PCI_CMDSTAT & PCI_COMMAND_MASTER) == 0)
99 void __init ixdp2800_pci_preinit(void)
101 printk("ixdp2x00_pci_preinit called\n");
103 *IXP2000_PCI_ADDR_EXT = 0x0001e000;
105 if (!ixdp2x00_master_npu())
106 ixdp2800_slave_disable_pci_master();
108 *IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff;
109 *IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff;
111 ixp2000_pci_preinit();
113 if (ixdp2x00_master_npu()) {
115 * Wait until the slave set its SRAM/SDRAM BAR sizes
116 * correctly before we proceed to scan and enumerate
119 ixdp2800_master_wait_for_slave();
122 * We configure the SDRAM BARs by hand because they
123 * are 1G and fall outside of the regular allocated
126 *IXP2000_PCI_SDRAM_BAR = 0x00000008;
129 * Wait for the master to complete scanning the bus
130 * and assigning resources before we proceed to scan
131 * the bus ourselves. Set pci=firmware to honor the
132 * master's resource assignment.
134 ixdp2800_slave_wait_for_master_enable();
135 pcibios_setup("firmware");
140 * We assign the SDRAM BARs for the two IXP2800 CPUs by hand, outside
141 * of the regular PCI window, because there's only 512M of outbound PCI
142 * memory window on each IXP, while we need 1G for each of the BARs.
144 static void __devinit ixp2800_pci_fixup(struct pci_dev *dev)
146 if (machine_is_ixdp2800()) {
147 dev->resource[2].start = 0;
148 dev->resource[2].end = 0;
149 dev->resource[2].flags = 0;
152 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IXP2800, ixp2800_pci_fixup);
154 static int __init ixdp2800_pci_setup(int nr, struct pci_sys_data *sys)
156 sys->mem_offset = 0x00000000;
158 ixp2000_pci_setup(nr, sys);
163 static int __init ixdp2800_pci_map_irq(const struct pci_dev *dev, u8 slot,
166 if (ixdp2x00_master_npu()) {
169 * Root bus devices. Slave NPU is only one with interrupt.
170 * Everything else, we just return -1 which is invalid.
172 if(!dev->bus->self) {
173 if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
174 return IRQ_IXDP2800_INGRESS_NPU;
180 * Bridge behind the PMC slot.
182 if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
183 dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
184 !dev->bus->parent->self->bus->parent)
185 return IRQ_IXDP2800_PMC;
188 * Device behind the first bridge
190 if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
192 case IXDP2X00_PMC_DEVFN:
193 return IRQ_IXDP2800_PMC;
195 case IXDP2800_MASTER_ENET_DEVFN:
196 return IRQ_IXDP2800_EGRESS_ENET;
198 case IXDP2800_SWITCH_FABRIC_DEVFN:
199 return IRQ_IXDP2800_FABRIC;
204 } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
207 static void __init ixdp2800_master_enable_slave(void)
211 printk(KERN_INFO "IXDP2800: enabling slave NPU\n");
213 addr = (volatile u32 *)ixp2000_pci_config_addr(0,
214 IXDP2X00_SLAVE_NPU_DEVFN,
217 *addr |= PCI_COMMAND_MASTER;
220 static void __init ixdp2800_master_wait_for_slave_bus_scan(void)
224 printk(KERN_INFO "IXDP2800: waiting for slave to finish bus scan\n");
226 addr = (volatile u32 *)ixp2000_pci_config_addr(0,
227 IXDP2X00_SLAVE_NPU_DEVFN,
229 while ((*addr & PCI_COMMAND_MEMORY) == 0)
233 static void __init ixdp2800_slave_signal_bus_scan_completion(void)
235 printk(KERN_INFO "IXDP2800: bus scan done, signaling master\n");
236 *IXP2000_PCI_CMDSTAT |= PCI_COMMAND_MEMORY;
239 static void __init ixdp2800_pci_postinit(void)
241 if (!ixdp2x00_master_npu()) {
242 ixdp2x00_slave_pci_postinit();
243 ixdp2800_slave_signal_bus_scan_completion();
247 struct __initdata hw_pci ixdp2800_pci __initdata = {
249 .setup = ixdp2800_pci_setup,
250 .preinit = ixdp2800_pci_preinit,
251 .postinit = ixdp2800_pci_postinit,
252 .scan = ixp2000_pci_scan_bus,
253 .map_irq = ixdp2800_pci_map_irq,
256 int __init ixdp2800_pci_init(void)
258 if (machine_is_ixdp2800()) {
261 pci_common_init(&ixdp2800_pci);
262 if (ixdp2x00_master_npu()) {
263 dev = pci_get_bus_and_slot(1, IXDP2800_SLAVE_ENET_DEVFN);
264 pci_stop_and_remove_bus_device(dev);
267 ixdp2800_master_enable_slave();
268 ixdp2800_master_wait_for_slave_bus_scan();
270 dev = pci_get_bus_and_slot(1, IXDP2800_MASTER_ENET_DEVFN);
271 pci_stop_and_remove_bus_device(dev);
279 subsys_initcall(ixdp2800_pci_init);
281 void __init ixdp2800_init_irq(void)
283 ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS);
286 MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform")
287 /* Maintainer: MontaVista Software, Inc. */
288 .atag_offset = 0x100,
289 .map_io = ixdp2x00_map_io,
290 .init_irq = ixdp2800_init_irq,
291 .timer = &ixdp2800_timer,
292 .init_machine = ixdp2x00_init_machine,
293 .restart = ixp2000_restart,