Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
c2k.c
Go to the documentation of this file.
1 /*
2  * Board setup routines for the GEFanuc C2K board
3  *
4  * Author: Remi Machet <[email protected]>
5  *
6  * Originated from prpmc2800.c
7  *
8  * 2008 (c) Stanford University
9  * 2007 (c) MontaVista, Software, Inc.
10  *
11  * This program is free software; you can redistribute it and/or modify it
12  * under the terms of the GNU General Public License version 2 as published
13  * by the Free Software Foundation.
14  */
15 
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/delay.h>
19 #include <linux/interrupt.h>
20 #include <linux/seq_file.h>
21 #include <linux/time.h>
22 #include <linux/of.h>
23 
24 #include <asm/machdep.h>
25 #include <asm/prom.h>
26 #include <asm/time.h>
27 
28 #include <mm/mmu_decl.h>
29 
30 #include <sysdev/mv64x60.h>
31 
32 #define MV64x60_MPP_CNTL_0 0x0000
33 #define MV64x60_MPP_CNTL_2 0x0008
34 
35 #define MV64x60_GPP_IO_CNTL 0x0000
36 #define MV64x60_GPP_LEVEL_CNTL 0x0010
37 #define MV64x60_GPP_VALUE_SET 0x0018
38 
39 static void __iomem *mv64x60_mpp_reg_base;
40 static void __iomem *mv64x60_gpp_reg_base;
41 
42 static void __init c2k_setup_arch(void)
43 {
44  struct device_node *np;
46  const unsigned int *reg;
47 
48  /*
49  * ioremap mpp and gpp registers in case they are later
50  * needed by c2k_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
66 #endif
67 }
68 
69 static void c2k_reset_board(void)
70 {
71  u32 temp;
72 
74 
75  temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0);
76  temp &= 0xFFFF0FFF;
77  out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0, temp);
78 
79  temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
80  temp |= 0x00000004;
81  out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
82 
83  temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
84  temp |= 0x00000004;
85  out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
86 
87  temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2);
88  temp &= 0xFFFF0FFF;
89  out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2, temp);
90 
91  temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
92  temp |= 0x00080000;
93  out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
94 
95  temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
96  temp |= 0x00080000;
97  out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
98 
99  out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_VALUE_SET, 0x00080004);
100 }
101 
102 static void c2k_restart(char *cmd)
103 {
104  c2k_reset_board();
105  msleep(100);
106  panic("restart failed\n");
107 }
108 
109 #ifdef CONFIG_NOT_COHERENT_CACHE
110 #define COHERENCY_SETTING "off"
111 #else
112 #define COHERENCY_SETTING "on"
113 #endif
114 
116 {
117  seq_printf(m, "Vendor\t\t: GEFanuc\n");
118  seq_printf(m, "coherency\t: %s\n", COHERENCY_SETTING);
119 }
120 
121 /*
122  * Called very early, device-tree isn't unflattened
123  */
124 static int __init c2k_probe(void)
125 {
126  unsigned long root = of_get_flat_dt_root();
127 
128  if (!of_flat_dt_is_compatible(root, "GEFanuc,C2K"))
129  return 0;
130 
131  printk(KERN_INFO "Detected a GEFanuc C2K board\n");
132 
133  _set_L2CR(0);
134  _set_L2CR(L2CR_L2E | L2CR_L2PE | L2CR_L2I);
135  return 1;
136 }
137 
139  .name = "C2K",
140  .probe = c2k_probe,
141  .setup_arch = c2k_setup_arch,
142  .init_early = mv64x60_init_early,
143  .show_cpuinfo = c2k_show_cpuinfo,
144  .init_IRQ = mv64x60_init_irq,
145  .get_irq = mv64x60_get_irq,
146  .restart = c2k_restart,
147  .calibrate_decr = generic_calibrate_decr,
148 };