Merge branch 'topic/misc' into topic/pcsp-fix
[linux-2.6] / arch / powerpc / platforms / 85xx / mpc85xx_ds.c
1 /*
2  * MPC85xx DS Board Setup
3  *
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.
8  *
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.
13  */
14
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
24 #include <asm/system.h>
25 #include <asm/time.h>
26 #include <asm/machdep.h>
27 #include <asm/pci-bridge.h>
28 #include <mm/mmu_decl.h>
29 #include <asm/prom.h>
30 #include <asm/udbg.h>
31 #include <asm/mpic.h>
32 #include <asm/i8259.h>
33
34 #include <sysdev/fsl_soc.h>
35 #include <sysdev/fsl_pci.h>
36
37 #undef DEBUG
38
39 #ifdef DEBUG
40 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
41 #else
42 #define DBG(fmt, args...)
43 #endif
44
45 #ifdef CONFIG_PPC_I8259
46 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
47 {
48         unsigned int cascade_irq = i8259_irq();
49
50         if (cascade_irq != NO_IRQ) {
51                 generic_handle_irq(cascade_irq);
52         }
53         desc->chip->eoi(irq);
54 }
55 #endif  /* CONFIG_PPC_I8259 */
56
57 void __init mpc85xx_ds_pic_init(void)
58 {
59         struct mpic *mpic;
60         struct resource r;
61         struct device_node *np;
62 #ifdef CONFIG_PPC_I8259
63         struct device_node *cascade_node = NULL;
64         int cascade_irq;
65 #endif
66
67         np = of_find_node_by_type(NULL, "open-pic");
68         if (np == NULL) {
69                 printk(KERN_ERR "Could not find open-pic node\n");
70                 return;
71         }
72
73         if (of_address_to_resource(np, 0, &r)) {
74                 printk(KERN_ERR "Failed to map mpic register space\n");
75                 of_node_put(np);
76                 return;
77         }
78
79         mpic = mpic_alloc(np, r.start,
80                           MPIC_PRIMARY | MPIC_WANTS_RESET |
81                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
82                           MPIC_SINGLE_DEST_CPU,
83                         0, 256, " OpenPIC  ");
84         BUG_ON(mpic == NULL);
85         of_node_put(np);
86
87         mpic_init(mpic);
88
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")) {
93                 cascade_node = np;
94                 break;
95         }
96
97         if (cascade_node == NULL) {
98                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
99                 return;
100         }
101
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");
105                 return;
106         }
107
108         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
109
110         i8259_init(cascade_node, 0);
111         of_node_put(cascade_node);
112
113         set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
114 #endif  /* CONFIG_PPC_I8259 */
115 }
116
117 #ifdef CONFIG_PCI
118 static int primary_phb_addr;
119 extern int uli_exclude_device(struct pci_controller *hose,
120                                 u_char bus, u_char devfn);
121
122 static int mpc85xx_exclude_device(struct pci_controller *hose,
123                                    u_char bus, u_char devfn)
124 {
125         struct device_node* node;
126         struct resource rsrc;
127
128         node = hose->dn;
129         of_address_to_resource(node, 0, &rsrc);
130
131         if ((rsrc.start & 0xfffff) == primary_phb_addr) {
132                 return uli_exclude_device(hose, bus, devfn);
133         }
134
135         return PCIBIOS_SUCCESSFUL;
136 }
137 #endif  /* CONFIG_PCI */
138
139 /*
140  * Setup the architecture
141  */
142 static void __init mpc85xx_ds_setup_arch(void)
143 {
144 #ifdef CONFIG_PCI
145         struct device_node *np;
146 #endif
147
148         if (ppc_md.progress)
149                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
150
151 #ifdef CONFIG_PCI
152         for_each_node_by_type(np, "pci") {
153                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
154                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
155                         struct resource rsrc;
156                         of_address_to_resource(np, 0, &rsrc);
157                         if ((rsrc.start & 0xfffff) == primary_phb_addr)
158                                 fsl_add_bridge(np, 1);
159                         else
160                                 fsl_add_bridge(np, 0);
161                 }
162         }
163
164         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
165 #endif
166
167         printk("MPC85xx DS board from Freescale Semiconductor\n");
168 }
169
170 /*
171  * Called very early, device-tree isn't unflattened
172  */
173 static int __init mpc8544_ds_probe(void)
174 {
175         unsigned long root = of_get_flat_dt_root();
176
177         if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
178 #ifdef CONFIG_PCI
179                 primary_phb_addr = 0xb000;
180 #endif
181                 return 1;
182         } else {
183                 return 0;
184         }
185 }
186
187 static struct of_device_id __initdata mpc85xxds_ids[] = {
188         { .type = "soc", },
189         { .compatible = "soc", },
190         { .compatible = "simple-bus", },
191         {},
192 };
193
194 static int __init mpc85xxds_publish_devices(void)
195 {
196         return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
197 }
198 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
199 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
200
201 /*
202  * Called very early, device-tree isn't unflattened
203  */
204 static int __init mpc8572_ds_probe(void)
205 {
206         unsigned long root = of_get_flat_dt_root();
207
208         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
209 #ifdef CONFIG_PCI
210                 primary_phb_addr = 0x8000;
211 #endif
212                 return 1;
213         } else {
214                 return 0;
215         }
216 }
217
218 define_machine(mpc8544_ds) {
219         .name                   = "MPC8544 DS",
220         .probe                  = mpc8544_ds_probe,
221         .setup_arch             = mpc85xx_ds_setup_arch,
222         .init_IRQ               = mpc85xx_ds_pic_init,
223 #ifdef CONFIG_PCI
224         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
225 #endif
226         .get_irq                = mpic_get_irq,
227         .restart                = fsl_rstcr_restart,
228         .calibrate_decr         = generic_calibrate_decr,
229         .progress               = udbg_progress,
230 };
231
232 define_machine(mpc8572_ds) {
233         .name                   = "MPC8572 DS",
234         .probe                  = mpc8572_ds_probe,
235         .setup_arch             = mpc85xx_ds_setup_arch,
236         .init_IRQ               = mpc85xx_ds_pic_init,
237 #ifdef CONFIG_PCI
238         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
239 #endif
240         .get_irq                = mpic_get_irq,
241         .restart                = fsl_rstcr_restart,
242         .calibrate_decr         = generic_calibrate_decr,
243         .progress               = udbg_progress,
244 };