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[linux-2.6/next.git] / arch / powerpc / platforms / 85xx / mpc85xx_ds.c
blobc7b97f70312e792d8cd59d761982fd112827ca3b
1 /*
2 * MPC85xx DS Board Setup
4 * Author Xianghua Xiao (x.xiao@freescale.com)
5 * Roy Zang <tie-fei.zang@freescale.com>
6 * - Add PCI/PCI Exprees support
7 * Copyright 2007 Freescale Semiconductor Inc.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/kdev_t.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/interrupt.h>
22 #include <linux/of_platform.h>
23 #include <linux/memblock.h>
25 #include <asm/system.h>
26 #include <asm/time.h>
27 #include <asm/machdep.h>
28 #include <asm/pci-bridge.h>
29 #include <mm/mmu_decl.h>
30 #include <asm/prom.h>
31 #include <asm/udbg.h>
32 #include <asm/mpic.h>
33 #include <asm/i8259.h>
34 #include <asm/swiotlb.h>
36 #include <sysdev/fsl_soc.h>
37 #include <sysdev/fsl_pci.h>
39 #undef DEBUG
41 #ifdef DEBUG
42 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
43 #else
44 #define DBG(fmt, args...)
45 #endif
47 #ifdef CONFIG_PPC_I8259
48 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
50 struct irq_chip *chip = irq_desc_get_chip(desc);
51 unsigned int cascade_irq = i8259_irq();
53 if (cascade_irq != NO_IRQ) {
54 generic_handle_irq(cascade_irq);
56 chip->irq_eoi(&desc->irq_data);
58 #endif /* CONFIG_PPC_I8259 */
60 void __init mpc85xx_ds_pic_init(void)
62 struct mpic *mpic;
63 struct resource r;
64 struct device_node *np;
65 #ifdef CONFIG_PPC_I8259
66 struct device_node *cascade_node = NULL;
67 int cascade_irq;
68 #endif
69 unsigned long root = of_get_flat_dt_root();
71 np = of_find_node_by_type(NULL, "open-pic");
72 if (np == NULL) {
73 printk(KERN_ERR "Could not find open-pic node\n");
74 return;
77 if (of_address_to_resource(np, 0, &r)) {
78 printk(KERN_ERR "Failed to map mpic register space\n");
79 of_node_put(np);
80 return;
83 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
84 mpic = mpic_alloc(np, r.start,
85 MPIC_PRIMARY |
86 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
87 0, 256, " OpenPIC ");
88 } else {
89 mpic = mpic_alloc(np, r.start,
90 MPIC_PRIMARY | MPIC_WANTS_RESET |
91 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
92 MPIC_SINGLE_DEST_CPU,
93 0, 256, " OpenPIC ");
96 BUG_ON(mpic == NULL);
97 of_node_put(np);
99 mpic_init(mpic);
101 #ifdef CONFIG_PPC_I8259
102 /* Initialize the i8259 controller */
103 for_each_node_by_type(np, "interrupt-controller")
104 if (of_device_is_compatible(np, "chrp,iic")) {
105 cascade_node = np;
106 break;
109 if (cascade_node == NULL) {
110 printk(KERN_DEBUG "Could not find i8259 PIC\n");
111 return;
114 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
115 if (cascade_irq == NO_IRQ) {
116 printk(KERN_ERR "Failed to map cascade interrupt\n");
117 return;
120 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
122 i8259_init(cascade_node, 0);
123 of_node_put(cascade_node);
125 irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
126 #endif /* CONFIG_PPC_I8259 */
129 #ifdef CONFIG_PCI
130 static int primary_phb_addr;
131 extern int uli_exclude_device(struct pci_controller *hose,
132 u_char bus, u_char devfn);
134 static int mpc85xx_exclude_device(struct pci_controller *hose,
135 u_char bus, u_char devfn)
137 struct device_node* node;
138 struct resource rsrc;
140 node = hose->dn;
141 of_address_to_resource(node, 0, &rsrc);
143 if ((rsrc.start & 0xfffff) == primary_phb_addr) {
144 return uli_exclude_device(hose, bus, devfn);
147 return PCIBIOS_SUCCESSFUL;
149 #endif /* CONFIG_PCI */
152 * Setup the architecture
154 #ifdef CONFIG_SMP
155 extern void __init mpc85xx_smp_init(void);
156 #endif
157 static void __init mpc85xx_ds_setup_arch(void)
159 #ifdef CONFIG_PCI
160 struct device_node *np;
161 struct pci_controller *hose;
162 #endif
163 dma_addr_t max = 0xffffffff;
165 if (ppc_md.progress)
166 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
168 #ifdef CONFIG_PCI
169 for_each_node_by_type(np, "pci") {
170 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
171 of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
172 of_device_is_compatible(np, "fsl,p2020-pcie")) {
173 struct resource rsrc;
174 of_address_to_resource(np, 0, &rsrc);
175 if ((rsrc.start & 0xfffff) == primary_phb_addr)
176 fsl_add_bridge(np, 1);
177 else
178 fsl_add_bridge(np, 0);
180 hose = pci_find_hose_for_OF_device(np);
181 max = min(max, hose->dma_window_base_cur +
182 hose->dma_window_size);
186 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
187 #endif
189 #ifdef CONFIG_SMP
190 mpc85xx_smp_init();
191 #endif
193 #ifdef CONFIG_SWIOTLB
194 if (memblock_end_of_DRAM() > max) {
195 ppc_swiotlb_enable = 1;
196 set_pci_dma_ops(&swiotlb_dma_ops);
197 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
199 #endif
201 printk("MPC85xx DS board from Freescale Semiconductor\n");
205 * Called very early, device-tree isn't unflattened
207 static int __init mpc8544_ds_probe(void)
209 unsigned long root = of_get_flat_dt_root();
211 if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
212 #ifdef CONFIG_PCI
213 primary_phb_addr = 0xb000;
214 #endif
215 return 1;
218 return 0;
221 static struct of_device_id __initdata mpc85xxds_ids[] = {
222 { .type = "soc", },
223 { .compatible = "soc", },
224 { .compatible = "simple-bus", },
225 { .compatible = "gianfar", },
229 static int __init mpc85xxds_publish_devices(void)
231 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
233 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
234 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
235 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
237 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
238 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
239 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
242 * Called very early, device-tree isn't unflattened
244 static int __init mpc8572_ds_probe(void)
246 unsigned long root = of_get_flat_dt_root();
248 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
249 #ifdef CONFIG_PCI
250 primary_phb_addr = 0x8000;
251 #endif
252 return 1;
255 return 0;
259 * Called very early, device-tree isn't unflattened
261 static int __init p2020_ds_probe(void)
263 unsigned long root = of_get_flat_dt_root();
265 if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
266 #ifdef CONFIG_PCI
267 primary_phb_addr = 0x9000;
268 #endif
269 return 1;
272 return 0;
275 define_machine(mpc8544_ds) {
276 .name = "MPC8544 DS",
277 .probe = mpc8544_ds_probe,
278 .setup_arch = mpc85xx_ds_setup_arch,
279 .init_IRQ = mpc85xx_ds_pic_init,
280 #ifdef CONFIG_PCI
281 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
282 #endif
283 .get_irq = mpic_get_irq,
284 .restart = fsl_rstcr_restart,
285 .calibrate_decr = generic_calibrate_decr,
286 .progress = udbg_progress,
289 define_machine(mpc8572_ds) {
290 .name = "MPC8572 DS",
291 .probe = mpc8572_ds_probe,
292 .setup_arch = mpc85xx_ds_setup_arch,
293 .init_IRQ = mpc85xx_ds_pic_init,
294 #ifdef CONFIG_PCI
295 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
296 #endif
297 .get_irq = mpic_get_irq,
298 .restart = fsl_rstcr_restart,
299 .calibrate_decr = generic_calibrate_decr,
300 .progress = udbg_progress,
303 define_machine(p2020_ds) {
304 .name = "P2020 DS",
305 .probe = p2020_ds_probe,
306 .setup_arch = mpc85xx_ds_setup_arch,
307 .init_IRQ = mpc85xx_ds_pic_init,
308 #ifdef CONFIG_PCI
309 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
310 #endif
311 .get_irq = mpic_get_irq,
312 .restart = fsl_rstcr_restart,
313 .calibrate_decr = generic_calibrate_decr,
314 .progress = udbg_progress,