Merge branch 'topic/jack-mechanical' into to-push
[linux-2.6] / arch / powerpc / platforms / 85xx / tqm85xx.c
1 /*
2  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
3  *
4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
5  *
6  * Copyright 2008 Freescale Semiconductor Inc.
7  *
8  * Copyright (c) 2005-2006 DENX Software Engineering
9  * Stefan Roese <sr@denx.de>
10  *
11  * Based on original work by
12  *      Kumar Gala <kumar.gala@freescale.com>
13  *      Copyright 2004 Freescale Semiconductor Inc.
14  *
15  * This program is free software; you can redistribute  it and/or modify it
16  * under  the terms of  the GNU General  Public License as published by the
17  * Free Software Foundation;  either version 2 of the  License, or (at your
18  * option) any later version.
19  */
20
21 #include <linux/stddef.h>
22 #include <linux/kernel.h>
23 #include <linux/pci.h>
24 #include <linux/kdev_t.h>
25 #include <linux/delay.h>
26 #include <linux/seq_file.h>
27 #include <linux/of_platform.h>
28
29 #include <asm/system.h>
30 #include <asm/time.h>
31 #include <asm/machdep.h>
32 #include <asm/pci-bridge.h>
33 #include <asm/mpic.h>
34 #include <asm/prom.h>
35 #include <mm/mmu_decl.h>
36 #include <asm/udbg.h>
37
38 #include <sysdev/fsl_soc.h>
39 #include <sysdev/fsl_pci.h>
40
41 #ifdef CONFIG_CPM2
42 #include <asm/cpm2.h>
43 #include <sysdev/cpm2_pic.h>
44
45 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
46 {
47         int cascade_irq;
48
49         while ((cascade_irq = cpm2_get_irq()) >= 0)
50                 generic_handle_irq(cascade_irq);
51
52         desc->chip->eoi(irq);
53 }
54 #endif /* CONFIG_CPM2 */
55
56 static void __init tqm85xx_pic_init(void)
57 {
58         struct mpic *mpic;
59         struct resource r;
60         struct device_node *np;
61 #ifdef CONFIG_CPM2
62         int irq;
63 #endif
64
65         np = of_find_node_by_type(NULL, "open-pic");
66         if (!np) {
67                 printk(KERN_ERR "Could not find open-pic node\n");
68                 return;
69         }
70
71         if (of_address_to_resource(np, 0, &r)) {
72                 printk(KERN_ERR "Could not map mpic register space\n");
73                 of_node_put(np);
74                 return;
75         }
76
77         mpic = mpic_alloc(np, r.start,
78                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
79                         0, 256, " OpenPIC  ");
80         BUG_ON(mpic == NULL);
81         of_node_put(np);
82
83         mpic_init(mpic);
84
85 #ifdef CONFIG_CPM2
86         /* Setup CPM2 PIC */
87         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
88         if (np == NULL) {
89                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
90                 return;
91         }
92         irq = irq_of_parse_and_map(np, 0);
93
94         if (irq == NO_IRQ) {
95                 of_node_put(np);
96                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
97                 return;
98         }
99
100         cpm2_pic_init(np);
101         of_node_put(np);
102         set_irq_chained_handler(irq, cpm2_cascade);
103 #endif
104 }
105
106 /*
107  * Setup the architecture
108  */
109 static void __init tqm85xx_setup_arch(void)
110 {
111 #ifdef CONFIG_PCI
112         struct device_node *np;
113 #endif
114
115         if (ppc_md.progress)
116                 ppc_md.progress("tqm85xx_setup_arch()", 0);
117
118 #ifdef CONFIG_CPM2
119         cpm2_reset();
120 #endif
121
122 #ifdef CONFIG_PCI
123         for_each_node_by_type(np, "pci") {
124                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
125                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
126                         struct resource rsrc;
127                         if (!of_address_to_resource(np, 0, &rsrc)) {
128                                 if ((rsrc.start & 0xfffff) == 0x8000)
129                                         fsl_add_bridge(np, 1);
130                                 else
131                                         fsl_add_bridge(np, 0);
132                         }
133                 }
134         }
135 #endif
136 }
137
138 static void tqm85xx_show_cpuinfo(struct seq_file *m)
139 {
140         uint pvid, svid, phid1;
141
142         pvid = mfspr(SPRN_PVR);
143         svid = mfspr(SPRN_SVR);
144
145         seq_printf(m, "Vendor\t\t: TQ Components\n");
146         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
147         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
148
149         /* Display cpu Pll setting */
150         phid1 = mfspr(SPRN_HID1);
151         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
152 }
153
154 static struct of_device_id __initdata of_bus_ids[] = {
155         { .compatible = "simple-bus", },
156         {},
157 };
158
159 static int __init declare_of_platform_devices(void)
160 {
161         of_platform_bus_probe(NULL, of_bus_ids, NULL);
162
163         return 0;
164 }
165 machine_device_initcall(tqm85xx, declare_of_platform_devices);
166
167 /*
168  * Called very early, device-tree isn't unflattened
169  */
170 static int __init tqm85xx_probe(void)
171 {
172         unsigned long root = of_get_flat_dt_root();
173
174         if ((of_flat_dt_is_compatible(root, "tqc,tqm8540")) ||
175             (of_flat_dt_is_compatible(root, "tqc,tqm8541")) ||
176             (of_flat_dt_is_compatible(root, "tqc,tqm8548")) ||
177             (of_flat_dt_is_compatible(root, "tqc,tqm8555")) ||
178             (of_flat_dt_is_compatible(root, "tqc,tqm8560")))
179                 return 1;
180
181         return 0;
182 }
183
184 define_machine(tqm85xx) {
185         .name                   = "TQM85xx",
186         .probe                  = tqm85xx_probe,
187         .setup_arch             = tqm85xx_setup_arch,
188         .init_IRQ               = tqm85xx_pic_init,
189         .show_cpuinfo           = tqm85xx_show_cpuinfo,
190         .get_irq                = mpic_get_irq,
191         .restart                = fsl_rstcr_restart,
192         .calibrate_decr         = generic_calibrate_decr,
193         .progress               = udbg_progress,
194 };