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/lmb.h>
25 #include <asm/system.h>
27 #include <asm/machdep.h>
28 #include <asm/pci-bridge.h>
29 #include <mm/mmu_decl.h>
33 #include <asm/i8259.h>
34 #include <asm/swiotlb.h>
36 #include <sysdev/fsl_soc.h>
37 #include <sysdev/fsl_pci.h>
42 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
44 #define DBG(fmt, args...)
47 #ifdef CONFIG_PPC_I8259
48 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
50 unsigned int cascade_irq = i8259_irq();
52 if (cascade_irq != NO_IRQ) {
53 generic_handle_irq(cascade_irq);
57 #endif /* CONFIG_PPC_I8259 */
59 void __init mpc85xx_ds_pic_init(void)
63 struct device_node *np;
64 #ifdef CONFIG_PPC_I8259
65 struct device_node *cascade_node = NULL;
68 unsigned long root = of_get_flat_dt_root();
70 np = of_find_node_by_type(NULL, "open-pic");
72 printk(KERN_ERR "Could not find open-pic node\n");
76 if (of_address_to_resource(np, 0, &r)) {
77 printk(KERN_ERR "Failed to map mpic register space\n");
82 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
83 mpic = mpic_alloc(np, r.start,
85 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
88 mpic = mpic_alloc(np, r.start,
89 MPIC_PRIMARY | MPIC_WANTS_RESET |
90 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
100 #ifdef CONFIG_PPC_I8259
101 /* Initialize the i8259 controller */
102 for_each_node_by_type(np, "interrupt-controller")
103 if (of_device_is_compatible(np, "chrp,iic")) {
108 if (cascade_node == NULL) {
109 printk(KERN_DEBUG "Could not find i8259 PIC\n");
113 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
114 if (cascade_irq == NO_IRQ) {
115 printk(KERN_ERR "Failed to map cascade interrupt\n");
119 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
121 i8259_init(cascade_node, 0);
122 of_node_put(cascade_node);
124 set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
125 #endif /* CONFIG_PPC_I8259 */
129 static int primary_phb_addr;
130 extern int uli_exclude_device(struct pci_controller *hose,
131 u_char bus, u_char devfn);
133 static int mpc85xx_exclude_device(struct pci_controller *hose,
134 u_char bus, u_char devfn)
136 struct device_node* node;
137 struct resource rsrc;
140 of_address_to_resource(node, 0, &rsrc);
142 if ((rsrc.start & 0xfffff) == primary_phb_addr) {
143 return uli_exclude_device(hose, bus, devfn);
146 return PCIBIOS_SUCCESSFUL;
148 #endif /* CONFIG_PCI */
151 * Setup the architecture
154 extern void __init mpc85xx_smp_init(void);
156 static void __init mpc85xx_ds_setup_arch(void)
159 struct device_node *np;
160 struct pci_controller *hose;
162 dma_addr_t max = 0xffffffff;
165 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
168 for_each_node_by_type(np, "pci") {
169 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
170 of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
171 of_device_is_compatible(np, "fsl,p2020-pcie")) {
172 struct resource rsrc;
173 of_address_to_resource(np, 0, &rsrc);
174 if ((rsrc.start & 0xfffff) == primary_phb_addr)
175 fsl_add_bridge(np, 1);
177 fsl_add_bridge(np, 0);
179 hose = pci_find_hose_for_OF_device(np);
180 max = min(max, hose->dma_window_base_cur +
181 hose->dma_window_size);
185 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
192 #ifdef CONFIG_SWIOTLB
193 if (lmb_end_of_DRAM() > max) {
194 ppc_swiotlb_enable = 1;
195 set_pci_dma_ops(&swiotlb_pci_dma_ops);
199 printk("MPC85xx DS board from Freescale Semiconductor\n");
203 * Called very early, device-tree isn't unflattened
205 static int __init mpc8544_ds_probe(void)
207 unsigned long root = of_get_flat_dt_root();
209 if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
211 primary_phb_addr = 0xb000;
219 static struct of_device_id __initdata mpc85xxds_ids[] = {
221 { .compatible = "soc", },
222 { .compatible = "simple-bus", },
223 { .compatible = "gianfar", },
227 static int __init mpc85xxds_publish_devices(void)
229 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
231 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
232 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
233 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
235 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
236 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
237 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
240 * Called very early, device-tree isn't unflattened
242 static int __init mpc8572_ds_probe(void)
244 unsigned long root = of_get_flat_dt_root();
246 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
248 primary_phb_addr = 0x8000;
257 * Called very early, device-tree isn't unflattened
259 static int __init p2020_ds_probe(void)
261 unsigned long root = of_get_flat_dt_root();
263 if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
265 primary_phb_addr = 0x9000;
273 define_machine(mpc8544_ds) {
274 .name = "MPC8544 DS",
275 .probe = mpc8544_ds_probe,
276 .setup_arch = mpc85xx_ds_setup_arch,
277 .init_IRQ = mpc85xx_ds_pic_init,
279 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
281 .get_irq = mpic_get_irq,
282 .restart = fsl_rstcr_restart,
283 .calibrate_decr = generic_calibrate_decr,
284 .progress = udbg_progress,
287 define_machine(mpc8572_ds) {
288 .name = "MPC8572 DS",
289 .probe = mpc8572_ds_probe,
290 .setup_arch = mpc85xx_ds_setup_arch,
291 .init_IRQ = mpc85xx_ds_pic_init,
293 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
295 .get_irq = mpic_get_irq,
296 .restart = fsl_rstcr_restart,
297 .calibrate_decr = generic_calibrate_decr,
298 .progress = udbg_progress,
301 define_machine(p2020_ds) {
303 .probe = p2020_ds_probe,
304 .setup_arch = mpc85xx_ds_setup_arch,
305 .init_IRQ = mpc85xx_ds_pic_init,
307 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
309 .get_irq = mpic_get_irq,
310 .restart = fsl_rstcr_restart,
311 .calibrate_decr = generic_calibrate_decr,
312 .progress = udbg_progress,