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>
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>
44 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
46 #define DBG(fmt, args...)
49 #ifdef CONFIG_PPC_I8259
50 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
52 struct irq_chip *chip = irq_desc_get_chip(desc);
53 unsigned int cascade_irq = i8259_irq();
55 if (cascade_irq != NO_IRQ) {
56 generic_handle_irq(cascade_irq);
58 chip->irq_eoi(&desc->irq_data);
60 #endif /* CONFIG_PPC_I8259 */
62 void __init mpc85xx_ds_pic_init(void)
66 struct device_node *np;
67 #ifdef CONFIG_PPC_I8259
68 struct device_node *cascade_node = NULL;
71 unsigned long root = of_get_flat_dt_root();
73 np = of_find_node_by_type(NULL, "open-pic");
75 printk(KERN_ERR "Could not find open-pic node\n");
79 if (of_address_to_resource(np, 0, &r)) {
80 printk(KERN_ERR "Failed to map mpic register space\n");
85 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
86 mpic = mpic_alloc(np, r.start,
88 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
92 mpic = mpic_alloc(np, r.start,
93 MPIC_PRIMARY | MPIC_WANTS_RESET |
94 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
104 #ifdef CONFIG_PPC_I8259
105 /* Initialize the i8259 controller */
106 for_each_node_by_type(np, "interrupt-controller")
107 if (of_device_is_compatible(np, "chrp,iic")) {
112 if (cascade_node == NULL) {
113 printk(KERN_DEBUG "Could not find i8259 PIC\n");
117 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
118 if (cascade_irq == NO_IRQ) {
119 printk(KERN_ERR "Failed to map cascade interrupt\n");
123 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
125 i8259_init(cascade_node, 0);
126 of_node_put(cascade_node);
128 irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
129 #endif /* CONFIG_PPC_I8259 */
133 static int primary_phb_addr;
134 extern int uli_exclude_device(struct pci_controller *hose,
135 u_char bus, u_char devfn);
137 static int mpc85xx_exclude_device(struct pci_controller *hose,
138 u_char bus, u_char devfn)
140 struct device_node* node;
141 struct resource rsrc;
144 of_address_to_resource(node, 0, &rsrc);
146 if ((rsrc.start & 0xfffff) == primary_phb_addr) {
147 return uli_exclude_device(hose, bus, devfn);
150 return PCIBIOS_SUCCESSFUL;
152 #endif /* CONFIG_PCI */
155 * Setup the architecture
158 extern void __init mpc85xx_smp_init(void);
160 static void __init mpc85xx_ds_setup_arch(void)
163 struct device_node *np;
164 struct pci_controller *hose;
166 dma_addr_t max = 0xffffffff;
169 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
172 for_each_node_by_type(np, "pci") {
173 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
174 of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
175 of_device_is_compatible(np, "fsl,p2020-pcie")) {
176 struct resource rsrc;
177 of_address_to_resource(np, 0, &rsrc);
178 if ((rsrc.start & 0xfffff) == primary_phb_addr)
179 fsl_add_bridge(np, 1);
181 fsl_add_bridge(np, 0);
183 hose = pci_find_hose_for_OF_device(np);
184 max = min(max, hose->dma_window_base_cur +
185 hose->dma_window_size);
189 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
196 #ifdef CONFIG_SWIOTLB
197 if (memblock_end_of_DRAM() > max) {
198 ppc_swiotlb_enable = 1;
199 set_pci_dma_ops(&swiotlb_dma_ops);
200 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
204 printk("MPC85xx DS board from Freescale Semiconductor\n");
208 * Called very early, device-tree isn't unflattened
210 static int __init mpc8544_ds_probe(void)
212 unsigned long root = of_get_flat_dt_root();
214 if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
216 primary_phb_addr = 0xb000;
224 static struct of_device_id __initdata mpc85xxds_ids[] = {
226 { .compatible = "soc", },
227 { .compatible = "simple-bus", },
228 { .compatible = "gianfar", },
232 static int __init mpc85xxds_publish_devices(void)
234 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
236 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
237 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
238 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
240 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
241 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
242 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
245 * Called very early, device-tree isn't unflattened
247 static int __init mpc8572_ds_probe(void)
249 unsigned long root = of_get_flat_dt_root();
251 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
253 primary_phb_addr = 0x8000;
262 * Called very early, device-tree isn't unflattened
264 static int __init p2020_ds_probe(void)
266 unsigned long root = of_get_flat_dt_root();
268 if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
270 primary_phb_addr = 0x9000;
278 define_machine(mpc8544_ds) {
279 .name = "MPC8544 DS",
280 .probe = mpc8544_ds_probe,
281 .setup_arch = mpc85xx_ds_setup_arch,
282 .init_IRQ = mpc85xx_ds_pic_init,
284 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
286 .get_irq = mpic_get_irq,
287 .restart = fsl_rstcr_restart,
288 .calibrate_decr = generic_calibrate_decr,
289 .progress = udbg_progress,
292 define_machine(mpc8572_ds) {
293 .name = "MPC8572 DS",
294 .probe = mpc8572_ds_probe,
295 .setup_arch = mpc85xx_ds_setup_arch,
296 .init_IRQ = mpc85xx_ds_pic_init,
298 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
300 .get_irq = mpic_get_irq,
301 .restart = fsl_rstcr_restart,
302 .calibrate_decr = generic_calibrate_decr,
303 .progress = udbg_progress,
306 define_machine(p2020_ds) {
308 .probe = p2020_ds_probe,
309 .setup_arch = mpc85xx_ds_setup_arch,
310 .init_IRQ = mpc85xx_ds_pic_init,
312 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
314 .get_irq = mpic_get_irq,
315 .restart = fsl_rstcr_restart,
316 .calibrate_decr = generic_calibrate_decr,
317 .progress = udbg_progress,