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>
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 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)
64 struct device_node *np;
65 #ifdef CONFIG_PPC_I8259
66 struct device_node *cascade_node = NULL;
69 unsigned long root = of_get_flat_dt_root();
71 np = of_find_node_by_type(NULL, "open-pic");
73 printk(KERN_ERR "Could not find open-pic node\n");
77 if (of_address_to_resource(np, 0, &r)) {
78 printk(KERN_ERR "Failed to map mpic register space\n");
83 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
84 mpic = mpic_alloc(np, r.start,
86 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
90 mpic = mpic_alloc(np, r.start,
91 MPIC_PRIMARY | MPIC_WANTS_RESET |
92 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
102 #ifdef CONFIG_PPC_I8259
103 /* Initialize the i8259 controller */
104 for_each_node_by_type(np, "interrupt-controller")
105 if (of_device_is_compatible(np, "chrp,iic")) {
110 if (cascade_node == NULL) {
111 printk(KERN_DEBUG "Could not find i8259 PIC\n");
115 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
116 if (cascade_irq == NO_IRQ) {
117 printk(KERN_ERR "Failed to map cascade interrupt\n");
121 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
123 i8259_init(cascade_node, 0);
124 of_node_put(cascade_node);
126 irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
127 #endif /* CONFIG_PPC_I8259 */
131 static int primary_phb_addr;
132 extern int uli_exclude_device(struct pci_controller *hose,
133 u_char bus, u_char devfn);
135 static int mpc85xx_exclude_device(struct pci_controller *hose,
136 u_char bus, u_char devfn)
138 struct device_node* node;
139 struct resource rsrc;
142 of_address_to_resource(node, 0, &rsrc);
144 if ((rsrc.start & 0xfffff) == primary_phb_addr) {
145 return uli_exclude_device(hose, bus, devfn);
148 return PCIBIOS_SUCCESSFUL;
150 #endif /* CONFIG_PCI */
153 * Setup the architecture
156 extern void __init mpc85xx_smp_init(void);
158 static void __init mpc85xx_ds_setup_arch(void)
161 struct device_node *np;
162 struct pci_controller *hose;
164 dma_addr_t max = 0xffffffff;
167 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
170 for_each_node_by_type(np, "pci") {
171 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
172 of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
173 of_device_is_compatible(np, "fsl,p2020-pcie")) {
174 struct resource rsrc;
175 of_address_to_resource(np, 0, &rsrc);
176 if ((rsrc.start & 0xfffff) == primary_phb_addr)
177 fsl_add_bridge(np, 1);
179 fsl_add_bridge(np, 0);
181 hose = pci_find_hose_for_OF_device(np);
182 max = min(max, hose->dma_window_base_cur +
183 hose->dma_window_size);
187 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
194 #ifdef CONFIG_SWIOTLB
195 if (memblock_end_of_DRAM() > max) {
196 ppc_swiotlb_enable = 1;
197 set_pci_dma_ops(&swiotlb_dma_ops);
198 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
202 printk("MPC85xx DS board from Freescale Semiconductor\n");
206 * Called very early, device-tree isn't unflattened
208 static int __init mpc8544_ds_probe(void)
210 unsigned long root = of_get_flat_dt_root();
212 if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
214 primary_phb_addr = 0xb000;
222 static struct of_device_id __initdata mpc85xxds_ids[] = {
224 { .compatible = "soc", },
225 { .compatible = "simple-bus", },
226 { .compatible = "gianfar", },
230 static int __init mpc85xxds_publish_devices(void)
232 return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
234 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
235 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
236 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
238 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
239 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
240 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
243 * Called very early, device-tree isn't unflattened
245 static int __init mpc8572_ds_probe(void)
247 unsigned long root = of_get_flat_dt_root();
249 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
251 primary_phb_addr = 0x8000;
260 * Called very early, device-tree isn't unflattened
262 static int __init p2020_ds_probe(void)
264 unsigned long root = of_get_flat_dt_root();
266 if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
268 primary_phb_addr = 0x9000;
276 define_machine(mpc8544_ds) {
277 .name = "MPC8544 DS",
278 .probe = mpc8544_ds_probe,
279 .setup_arch = mpc85xx_ds_setup_arch,
280 .init_IRQ = mpc85xx_ds_pic_init,
282 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
284 .get_irq = mpic_get_irq,
285 .restart = fsl_rstcr_restart,
286 .calibrate_decr = generic_calibrate_decr,
287 .progress = udbg_progress,
290 define_machine(mpc8572_ds) {
291 .name = "MPC8572 DS",
292 .probe = mpc8572_ds_probe,
293 .setup_arch = mpc85xx_ds_setup_arch,
294 .init_IRQ = mpc85xx_ds_pic_init,
296 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
298 .get_irq = mpic_get_irq,
299 .restart = fsl_rstcr_restart,
300 .calibrate_decr = generic_calibrate_decr,
301 .progress = udbg_progress,
304 define_machine(p2020_ds) {
306 .probe = p2020_ds_probe,
307 .setup_arch = mpc85xx_ds_setup_arch,
308 .init_IRQ = mpc85xx_ds_pic_init,
310 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
312 .get_irq = mpic_get_irq,
313 .restart = fsl_rstcr_restart,
314 .calibrate_decr = generic_calibrate_decr,
315 .progress = udbg_progress,