Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight
[linux-2.6] / arch / powerpc / platforms / embedded6xx / prpmc2800.c
1 /*
2  * Board setup routines for the Motorola PrPMC2800
3  *
4  * Author: Dale Farnsworth <dale@farnsworth.org>
5  *
6  * 2007 (c) MontaVista, Software, Inc.  This file is licensed under
7  * the terms of the GNU General Public License version 2.  This program
8  * is licensed "as is" without any warranty of any kind, whether express
9  * or implied.
10  */
11
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/seq_file.h>
17
18 #include <asm/machdep.h>
19 #include <asm/prom.h>
20 #include <asm/system.h>
21 #include <asm/time.h>
22 #include <asm/kexec.h>
23
24 #include <mm/mmu_decl.h>
25
26 #include <sysdev/mv64x60.h>
27
28 #define MV64x60_MPP_CNTL_0      0x0000
29 #define MV64x60_MPP_CNTL_2      0x0008
30
31 #define MV64x60_GPP_IO_CNTL     0x0000
32 #define MV64x60_GPP_LEVEL_CNTL  0x0010
33 #define MV64x60_GPP_VALUE_SET   0x0018
34
35 #define PLATFORM_NAME_MAX       32
36
37 static char prpmc2800_platform_name[PLATFORM_NAME_MAX];
38
39 static void __iomem *mv64x60_mpp_reg_base;
40 static void __iomem *mv64x60_gpp_reg_base;
41
42 static void __init prpmc2800_setup_arch(void)
43 {
44         struct device_node *np;
45         phys_addr_t paddr;
46         const unsigned int *reg;
47
48         /*
49          * ioremap mpp and gpp registers in case they are later
50          * needed by prpmc2800_reset_board().
51          */
52         np = of_find_compatible_node(NULL, NULL, "marvell,mv64360-mpp");
53         reg = of_get_property(np, "reg", NULL);
54         paddr = of_translate_address(np, reg);
55         of_node_put(np);
56         mv64x60_mpp_reg_base = ioremap(paddr, reg[1]);
57
58         np = of_find_compatible_node(NULL, NULL, "marvell,mv64360-gpp");
59         reg = of_get_property(np, "reg", NULL);
60         paddr = of_translate_address(np, reg);
61         of_node_put(np);
62         mv64x60_gpp_reg_base = ioremap(paddr, reg[1]);
63
64 #ifdef CONFIG_PCI
65         mv64x60_pci_init();
66 #endif
67
68         printk("Motorola %s\n", prpmc2800_platform_name);
69 }
70
71 static void prpmc2800_reset_board(void)
72 {
73         u32 temp;
74
75         local_irq_disable();
76
77         temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0);
78         temp &= 0xFFFF0FFF;
79         out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0, temp);
80
81         temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
82         temp |= 0x00000004;
83         out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
84
85         temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
86         temp |= 0x00000004;
87         out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
88
89         temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2);
90         temp &= 0xFFFF0FFF;
91         out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2, temp);
92
93         temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
94         temp |= 0x00080000;
95         out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
96
97         temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
98         temp |= 0x00080000;
99         out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
100
101         out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_VALUE_SET, 0x00080004);
102 }
103
104 static void prpmc2800_restart(char *cmd)
105 {
106         volatile ulong i = 10000000;
107
108         prpmc2800_reset_board();
109
110         while (i-- > 0);
111         panic("restart failed\n");
112 }
113
114 #ifdef CONFIG_NOT_COHERENT_CACHE
115 #define PPRPM2800_COHERENCY_SETTING "off"
116 #else
117 #define PPRPM2800_COHERENCY_SETTING "on"
118 #endif
119
120 void prpmc2800_show_cpuinfo(struct seq_file *m)
121 {
122         seq_printf(m, "Vendor\t\t: Motorola\n");
123         seq_printf(m, "coherency\t: %s\n", PPRPM2800_COHERENCY_SETTING);
124 }
125
126 /*
127  * Called very early, device-tree isn't unflattened
128  */
129 static int __init prpmc2800_probe(void)
130 {
131         unsigned long root = of_get_flat_dt_root();
132         unsigned long len = PLATFORM_NAME_MAX;
133         void *m;
134
135         if (!of_flat_dt_is_compatible(root, "motorola,PrPMC2800"))
136                 return 0;
137
138         /* Update ppc_md.name with name from dt */
139         m = of_get_flat_dt_prop(root, "model", &len);
140         if (m)
141                 strncpy(prpmc2800_platform_name, m,
142                         min((int)len, PLATFORM_NAME_MAX - 1));
143
144         _set_L2CR(_get_L2CR() | L2CR_L2E);
145         return 1;
146 }
147
148 define_machine(prpmc2800){
149         .name                   = prpmc2800_platform_name,
150         .probe                  = prpmc2800_probe,
151         .setup_arch             = prpmc2800_setup_arch,
152         .init_early             = mv64x60_init_early,
153         .show_cpuinfo           = prpmc2800_show_cpuinfo,
154         .init_IRQ               = mv64x60_init_irq,
155         .get_irq                = mv64x60_get_irq,
156         .restart                = prpmc2800_restart,
157         .calibrate_decr         = generic_calibrate_decr,
158 #ifdef CONFIG_KEXEC
159         .machine_kexec          = default_machine_kexec,
160         .machine_kexec_prepare  = default_machine_kexec_prepare,
161         .machine_crash_shutdown = default_machine_crash_shutdown,
162 #endif
163 };