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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Torvalds1da177e2005-04-16 15:20:36 -070017#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 Kingfced80c2008-09-06 12:10:45 +010028#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/irq.h>
31#include <asm/pgtable.h>
32#include <asm/page.h>
33#include <asm/system.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010034#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#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 Torvalds1da177e2005-04-16 15:20:36 -070044/*************************************************************************
45 * IXDP2800 timer tick
46 *************************************************************************/
47
48static void __init ixdp2800_timer_init(void)
49{
50 ixp2000_init_time(50000000);
51}
52
53static struct sys_timer ixdp2800_timer = {
54 .init = ixdp2800_timer_init,
55 .offset = ixp2000_gettimeoffset,
56};
57
58/*************************************************************************
59 * IXDP2800 PCI
60 *************************************************************************/
Lennert Buytenhek53e173f2005-04-29 22:13:57 +010061static void __init ixdp2800_slave_disable_pci_master(void)
62{
63 *IXP2000_PCI_CMDSTAT &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
64}
65
66static 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
93static 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 Torvalds1da177e2005-04-16 15:20:36 -0700101void __init ixdp2800_pci_preinit(void)
102{
103 printk("ixdp2x00_pci_preinit called\n");
104
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100105 *IXP2000_PCI_ADDR_EXT = 0x0001e000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100107 if (!ixdp2x00_master_npu())
108 ixdp2800_slave_disable_pci_master();
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 *IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff;
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100111 *IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 ixp2000_pci_preinit();
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100114
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 Torvalds1da177e2005-04-16 15:20:36 -0700139}
140
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100141/*
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 */
146static 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}
154DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IXP2800, ixp2800_pci_fixup);
155
156static int __init ixdp2800_pci_setup(int nr, struct pci_sys_data *sys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{
158 sys->mem_offset = 0x00000000;
159
160 ixp2000_pci_setup(nr, sys);
161
162 return 1;
163}
164
165static 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 Buytenhek53e173f2005-04-29 22:13:57 +0100208static void __init ixdp2800_master_enable_slave(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100210 volatile u32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100212 printk(KERN_INFO "IXDP2800: enabling slave NPU\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100214 addr = (volatile u32 *)ixp2000_pci_config_addr(0,
215 IXDP2X00_SLAVE_NPU_DEVFN,
216 PCI_COMMAND);
217
218 *addr |= PCI_COMMAND_MASTER;
219}
220
221static 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
234static 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
240static void __init ixdp2800_pci_postinit(void)
241{
242 if (!ixdp2x00_master_npu()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 ixdp2x00_slave_pci_postinit();
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100244 ixdp2800_slave_signal_bus_scan_completion();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 }
246}
247
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100248struct __initdata hw_pci ixdp2800_pci __initdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 .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
257int __init ixdp2800_pci_init(void)
258{
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100259 if (machine_is_ixdp2800()) {
260 struct pci_dev *dev;
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 pci_common_init(&ixdp2800_pci);
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100263 if (ixdp2x00_master_npu()) {
Alan Cox7281c242006-10-16 16:49:50 +0100264 dev = pci_get_bus_and_slot(1, IXDP2800_SLAVE_ENET_DEVFN);
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100265 pci_remove_bus_device(dev);
Alan Cox7281c242006-10-16 16:49:50 +0100266 pci_dev_put(dev);
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100267
268 ixdp2800_master_enable_slave();
269 ixdp2800_master_wait_for_slave_bus_scan();
270 } else {
Alan Cox7281c242006-10-16 16:49:50 +0100271 dev = pci_get_bus_and_slot(1, IXDP2800_MASTER_ENET_DEVFN);
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100272 pci_remove_bus_device(dev);
Alan Cox7281c242006-10-16 16:49:50 +0100273 pci_dev_put(dev);
Lennert Buytenhek53e173f2005-04-29 22:13:57 +0100274 }
275 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277 return 0;
278}
279
280subsys_initcall(ixdp2800_pci_init);
281
Russell Kingcdea4602007-05-30 17:48:45 +0100282void __init ixdp2800_init_irq(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
284 ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS);
285}
286
287MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform")
Russell Kinge9dea0c2005-07-03 17:38:58 +0100288 /* Maintainer: MontaVista Software, Inc. */
Russell Kinge9dea0c2005-07-03 17:38:58 +0100289 .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 Torvalds1da177e2005-04-16 15:20:36 -0700294 .timer = &ixdp2800_timer,
Russell Kinge9dea0c2005-07-03 17:38:58 +0100295 .init_machine = ixdp2x00_init_machine,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296MACHINE_END
297