Merge branch 'master' of git://git.infradead.org/users/dedekind/mtd-tests-2.6
[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         unsigned long root = of_get_flat_dt_root();
67
68         np = of_find_node_by_type(NULL, "open-pic");
69         if (np == NULL) {
70                 printk(KERN_ERR "Could not find open-pic node\n");
71                 return;
72         }
73
74         if (of_address_to_resource(np, 0, &r)) {
75                 printk(KERN_ERR "Failed to map mpic register space\n");
76                 of_node_put(np);
77                 return;
78         }
79
80         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
81                 mpic = mpic_alloc(np, r.start,
82                         MPIC_PRIMARY |
83                         MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
84                         0, 256, " OpenPIC  ");
85         } else {
86                 mpic = mpic_alloc(np, r.start,
87                           MPIC_PRIMARY | MPIC_WANTS_RESET |
88                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
89                           MPIC_SINGLE_DEST_CPU,
90                         0, 256, " OpenPIC  ");
91         }
92
93         BUG_ON(mpic == NULL);
94         of_node_put(np);
95
96         mpic_init(mpic);
97
98 #ifdef CONFIG_PPC_I8259
99         /* Initialize the i8259 controller */
100         for_each_node_by_type(np, "interrupt-controller")
101             if (of_device_is_compatible(np, "chrp,iic")) {
102                 cascade_node = np;
103                 break;
104         }
105
106         if (cascade_node == NULL) {
107                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
108                 return;
109         }
110
111         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
112         if (cascade_irq == NO_IRQ) {
113                 printk(KERN_ERR "Failed to map cascade interrupt\n");
114                 return;
115         }
116
117         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
118
119         i8259_init(cascade_node, 0);
120         of_node_put(cascade_node);
121
122         set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
123 #endif  /* CONFIG_PPC_I8259 */
124 }
125
126 #ifdef CONFIG_PCI
127 static int primary_phb_addr;
128 extern int uli_exclude_device(struct pci_controller *hose,
129                                 u_char bus, u_char devfn);
130
131 static int mpc85xx_exclude_device(struct pci_controller *hose,
132                                    u_char bus, u_char devfn)
133 {
134         struct device_node* node;
135         struct resource rsrc;
136
137         node = hose->dn;
138         of_address_to_resource(node, 0, &rsrc);
139
140         if ((rsrc.start & 0xfffff) == primary_phb_addr) {
141                 return uli_exclude_device(hose, bus, devfn);
142         }
143
144         return PCIBIOS_SUCCESSFUL;
145 }
146 #endif  /* CONFIG_PCI */
147
148 /*
149  * Setup the architecture
150  */
151 static void __init mpc85xx_ds_setup_arch(void)
152 {
153 #ifdef CONFIG_PCI
154         struct device_node *np;
155 #endif
156
157         if (ppc_md.progress)
158                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
159
160 #ifdef CONFIG_PCI
161         for_each_node_by_type(np, "pci") {
162                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
163                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
164                         struct resource rsrc;
165                         of_address_to_resource(np, 0, &rsrc);
166                         if ((rsrc.start & 0xfffff) == primary_phb_addr)
167                                 fsl_add_bridge(np, 1);
168                         else
169                                 fsl_add_bridge(np, 0);
170                 }
171         }
172
173         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
174 #endif
175
176         printk("MPC85xx DS board from Freescale Semiconductor\n");
177 }
178
179 /*
180  * Called very early, device-tree isn't unflattened
181  */
182 static int __init mpc8544_ds_probe(void)
183 {
184         unsigned long root = of_get_flat_dt_root();
185
186         if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
187 #ifdef CONFIG_PCI
188                 primary_phb_addr = 0xb000;
189 #endif
190                 return 1;
191         } else {
192                 return 0;
193         }
194 }
195
196 static struct of_device_id __initdata mpc85xxds_ids[] = {
197         { .type = "soc", },
198         { .compatible = "soc", },
199         { .compatible = "simple-bus", },
200         {},
201 };
202
203 static int __init mpc85xxds_publish_devices(void)
204 {
205         return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
206 }
207 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
208 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
209
210 /*
211  * Called very early, device-tree isn't unflattened
212  */
213 static int __init mpc8572_ds_probe(void)
214 {
215         unsigned long root = of_get_flat_dt_root();
216
217         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
218 #ifdef CONFIG_PCI
219                 primary_phb_addr = 0x8000;
220 #endif
221                 return 1;
222         } else {
223                 return 0;
224         }
225 }
226
227 define_machine(mpc8544_ds) {
228         .name                   = "MPC8544 DS",
229         .probe                  = mpc8544_ds_probe,
230         .setup_arch             = mpc85xx_ds_setup_arch,
231         .init_IRQ               = mpc85xx_ds_pic_init,
232 #ifdef CONFIG_PCI
233         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
234 #endif
235         .get_irq                = mpic_get_irq,
236         .restart                = fsl_rstcr_restart,
237         .calibrate_decr         = generic_calibrate_decr,
238         .progress               = udbg_progress,
239 };
240
241 define_machine(mpc8572_ds) {
242         .name                   = "MPC8572 DS",
243         .probe                  = mpc8572_ds_probe,
244         .setup_arch             = mpc85xx_ds_setup_arch,
245         .init_IRQ               = mpc85xx_ds_pic_init,
246 #ifdef CONFIG_PCI
247         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
248 #endif
249         .get_irq                = mpic_get_irq,
250         .restart                = fsl_rstcr_restart,
251         .calibrate_decr         = generic_calibrate_decr,
252         .progress               = udbg_progress,
253 };