Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
[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
23 #include <asm/system.h>
24 #include <asm/time.h>
25 #include <asm/machdep.h>
26 #include <asm/pci-bridge.h>
27 #include <mm/mmu_decl.h>
28 #include <asm/prom.h>
29 #include <asm/udbg.h>
30 #include <asm/mpic.h>
31 #include <asm/i8259.h>
32
33 #include <sysdev/fsl_soc.h>
34 #include <sysdev/fsl_pci.h>
35
36 #undef DEBUG
37
38 #ifdef DEBUG
39 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
40 #else
41 #define DBG(fmt, args...)
42 #endif
43
44 #ifdef CONFIG_PPC_I8259
45 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
46 {
47         unsigned int cascade_irq = i8259_irq();
48
49         if (cascade_irq != NO_IRQ) {
50                 generic_handle_irq(cascade_irq);
51         }
52         desc->chip->eoi(irq);
53 }
54 #endif  /* CONFIG_PPC_I8259 */
55
56 void __init mpc85xx_ds_pic_init(void)
57 {
58         struct mpic *mpic;
59         struct resource r;
60         struct device_node *np = NULL;
61 #ifdef CONFIG_PPC_I8259
62         struct device_node *cascade_node = NULL;
63         int cascade_irq;
64 #endif
65
66         np = of_find_node_by_type(np, "open-pic");
67
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 | MPIC_BIG_ENDIAN,
81                         0, 256, " OpenPIC  ");
82         BUG_ON(mpic == NULL);
83
84         mpic_init(mpic);
85
86 #ifdef CONFIG_PPC_I8259
87         /* Initialize the i8259 controller */
88         for_each_node_by_type(np, "interrupt-controller")
89             if (of_device_is_compatible(np, "chrp,iic")) {
90                 cascade_node = np;
91                 break;
92         }
93
94         if (cascade_node == NULL) {
95                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
96                 return;
97         }
98
99         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
100         if (cascade_irq == NO_IRQ) {
101                 printk(KERN_ERR "Failed to map cascade interrupt\n");
102                 return;
103         }
104
105         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
106
107         i8259_init(cascade_node, 0);
108         of_node_put(cascade_node);
109
110         set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
111 #endif  /* CONFIG_PPC_I8259 */
112 }
113
114 #ifdef CONFIG_PCI
115 static int primary_phb_addr;
116 extern int uses_fsl_uli_m1575;
117 extern int uli_exclude_device(struct pci_controller *hose,
118                                 u_char bus, u_char devfn);
119
120 static int mpc85xx_exclude_device(struct pci_controller *hose,
121                                    u_char bus, u_char devfn)
122 {
123         struct device_node* node;
124         struct resource rsrc;
125
126         node = (struct device_node *)hose->arch_data;
127         of_address_to_resource(node, 0, &rsrc);
128
129         if ((rsrc.start & 0xfffff) == primary_phb_addr) {
130                 return uli_exclude_device(hose, bus, devfn);
131         }
132
133         return PCIBIOS_SUCCESSFUL;
134 }
135 #endif  /* CONFIG_PCI */
136
137 /*
138  * Setup the architecture
139  */
140 static void __init mpc85xx_ds_setup_arch(void)
141 {
142 #ifdef CONFIG_PCI
143         struct device_node *np;
144 #endif
145
146         if (ppc_md.progress)
147                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
148
149 #ifdef CONFIG_PCI
150         for_each_node_by_type(np, "pci") {
151                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
152                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
153                         struct resource rsrc;
154                         of_address_to_resource(np, 0, &rsrc);
155                         if ((rsrc.start & 0xfffff) == primary_phb_addr)
156                                 fsl_add_bridge(np, 1);
157                         else
158                                 fsl_add_bridge(np, 0);
159                 }
160         }
161
162         uses_fsl_uli_m1575 = 1;
163         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
164 #endif
165
166         printk("MPC85xx DS board from Freescale Semiconductor\n");
167 }
168
169 /*
170  * Called very early, device-tree isn't unflattened
171  */
172 static int __init mpc8544_ds_probe(void)
173 {
174         unsigned long root = of_get_flat_dt_root();
175
176         if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
177 #ifdef CONFIG_PCI
178                 primary_phb_addr = 0xb000;
179 #endif
180                 return 1;
181         } else {
182                 return 0;
183         }
184 }
185
186 /*
187  * Called very early, device-tree isn't unflattened
188  */
189 static int __init mpc8572_ds_probe(void)
190 {
191         unsigned long root = of_get_flat_dt_root();
192
193         if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
194 #ifdef CONFIG_PCI
195                 primary_phb_addr = 0x8000;
196 #endif
197                 return 1;
198         } else {
199                 return 0;
200         }
201 }
202
203 define_machine(mpc8544_ds) {
204         .name                   = "MPC8544 DS",
205         .probe                  = mpc8544_ds_probe,
206         .setup_arch             = mpc85xx_ds_setup_arch,
207         .init_IRQ               = mpc85xx_ds_pic_init,
208 #ifdef CONFIG_PCI
209         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
210 #endif
211         .get_irq                = mpic_get_irq,
212         .restart                = fsl_rstcr_restart,
213         .calibrate_decr         = generic_calibrate_decr,
214         .progress               = udbg_progress,
215 };
216
217 define_machine(mpc8572_ds) {
218         .name                   = "MPC8572 DS",
219         .probe                  = mpc8572_ds_probe,
220         .setup_arch             = mpc85xx_ds_setup_arch,
221         .init_IRQ               = mpc85xx_ds_pic_init,
222 #ifdef CONFIG_PCI
223         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
224 #endif
225         .get_irq                = mpic_get_irq,
226         .restart                = fsl_rstcr_restart,
227         .calibrate_decr         = generic_calibrate_decr,
228         .progress               = udbg_progress,
229 };