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>
45 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
47 #define DBG(fmt, args...)
50 #ifdef CONFIG_PPC_I8259
51 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
53 struct irq_chip *chip = irq_desc_get_chip(desc);
54 unsigned int cascade_irq = i8259_irq();
56 if (cascade_irq != NO_IRQ) {
57 generic_handle_irq(cascade_irq);
59 chip->irq_eoi(&desc->irq_data);
61 #endif /* CONFIG_PPC_I8259 */
63 void __init mpc85xx_ds_pic_init(void)
66 #ifdef CONFIG_PPC_I8259
67 struct device_node *np;
68 struct device_node *cascade_node = NULL;
71 unsigned long root = of_get_flat_dt_root();
73 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
74 mpic = mpic_alloc(NULL, 0,
80 mpic = mpic_alloc(NULL, 0,
89 #ifdef CONFIG_PPC_I8259
90 /* Initialize the i8259 controller */
91 for_each_node_by_type(np, "interrupt-controller")
92 if (of_device_is_compatible(np, "chrp,iic")) {
97 if (cascade_node == NULL) {
98 printk(KERN_DEBUG "Could not find i8259 PIC\n");
102 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
103 if (cascade_irq == NO_IRQ) {
104 printk(KERN_ERR "Failed to map cascade interrupt\n");
108 DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
110 i8259_init(cascade_node, 0);
111 of_node_put(cascade_node);
113 irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
114 #endif /* CONFIG_PPC_I8259 */
118 static int primary_phb_addr;
119 extern int uli_exclude_device(struct pci_controller *hose,
120 u_char bus, u_char devfn);
122 static int mpc85xx_exclude_device(struct pci_controller *hose,
123 u_char bus, u_char devfn)
125 struct device_node* node;
126 struct resource rsrc;
129 of_address_to_resource(node, 0, &rsrc);
131 if ((rsrc.start & 0xfffff) == primary_phb_addr) {
132 return uli_exclude_device(hose, bus, devfn);
135 return PCIBIOS_SUCCESSFUL;
137 #endif /* CONFIG_PCI */
140 * Setup the architecture
142 static void __init mpc85xx_ds_setup_arch(void)
145 struct device_node *np;
146 struct pci_controller *hose;
148 dma_addr_t max = 0xffffffff;
151 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
154 for_each_node_by_type(np, "pci") {
155 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
156 of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
157 of_device_is_compatible(np, "fsl,p2020-pcie")) {
158 struct resource rsrc;
159 of_address_to_resource(np, 0, &rsrc);
160 if ((rsrc.start & 0xfffff) == primary_phb_addr)
161 fsl_add_bridge(np, 1);
163 fsl_add_bridge(np, 0);
165 hose = pci_find_hose_for_OF_device(np);
166 max = min(max, hose->dma_window_base_cur +
167 hose->dma_window_size);
171 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
176 #ifdef CONFIG_SWIOTLB
177 if (memblock_end_of_DRAM() > max) {
178 ppc_swiotlb_enable = 1;
179 set_pci_dma_ops(&swiotlb_dma_ops);
180 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
184 printk("MPC85xx DS board from Freescale Semiconductor\n");
188 * Called very early, device-tree isn't unflattened
190 static int __init mpc8544_ds_probe(void)
192 unsigned long root = of_get_flat_dt_root();
194 if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
196 primary_phb_addr = 0xb000;
204 machine_device_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
205 machine_device_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
206 machine_device_initcall(p2020_ds, mpc85xx_common_publish_devices);
208 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
209 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
210 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
213 * Called very early, device-tree isn't unflattened
215 static int __init mpc8572_ds_probe(void)
217 unsigned long root = of_get_flat_dt_root();
219 if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
221 primary_phb_addr = 0x8000;
230 * Called very early, device-tree isn't unflattened
232 static int __init p2020_ds_probe(void)
234 unsigned long root = of_get_flat_dt_root();
236 if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
238 primary_phb_addr = 0x9000;
246 define_machine(mpc8544_ds) {
247 .name = "MPC8544 DS",
248 .probe = mpc8544_ds_probe,
249 .setup_arch = mpc85xx_ds_setup_arch,
250 .init_IRQ = mpc85xx_ds_pic_init,
252 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
254 .get_irq = mpic_get_irq,
255 .restart = fsl_rstcr_restart,
256 .calibrate_decr = generic_calibrate_decr,
257 .progress = udbg_progress,
260 define_machine(mpc8572_ds) {
261 .name = "MPC8572 DS",
262 .probe = mpc8572_ds_probe,
263 .setup_arch = mpc85xx_ds_setup_arch,
264 .init_IRQ = mpc85xx_ds_pic_init,
266 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
268 .get_irq = mpic_get_irq,
269 .restart = fsl_rstcr_restart,
270 .calibrate_decr = generic_calibrate_decr,
271 .progress = udbg_progress,
274 define_machine(p2020_ds) {
276 .probe = p2020_ds_probe,
277 .setup_arch = mpc85xx_ds_setup_arch,
278 .init_IRQ = mpc85xx_ds_pic_init,
280 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
282 .get_irq = mpic_get_irq,
283 .restart = fsl_rstcr_restart,
284 .calibrate_decr = generic_calibrate_decr,
285 .progress = udbg_progress,