OpenWrt – Blame information for rev 2

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1 office 1 /*
2 * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
7 *
8 */
9  
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/io.h>
14  
15 #include <asm/addrspace.h>
16  
17 #include <asm/mach-adm5120/adm5120_info.h>
18 #include <asm/mach-adm5120/adm5120_defs.h>
19 #include <asm/mach-adm5120/adm5120_switch.h>
20  
21 unsigned int adm5120_product_code;
22 unsigned int adm5120_revision;
23 unsigned int adm5120_package;
24 unsigned int adm5120_nand_boot;
25 unsigned long adm5120_speed;
26  
27 /*
28 * CPU settings detection
29 */
30 #define CODE_GET_PC(c) ((c) & CODE_PC_MASK)
31 #define CODE_GET_REV(c) (((c) >> CODE_REV_SHIFT) & CODE_REV_MASK)
32 #define CODE_GET_PK(c) (((c) >> CODE_PK_SHIFT) & CODE_PK_MASK)
33 #define CODE_GET_CLKS(c) (((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK)
34 #define CODE_GET_NAB(c) (((c) & CODE_NAB) != 0)
35  
36 void adm5120_ndelay(u32 ns)
37 {
38 u32 t;
39  
40 SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT);
41 SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM));
42  
43 t = (ns+640) / 640;
44 t &= TIMER_PERIOD_MASK;
45 SW_WRITE_REG(SWITCH_REG_TIMER, t | TIMER_TE);
46  
47 /* wait until the timer expires */
48 do {
49 t = SW_READ_REG(SWITCH_REG_TIMER_INT);
50 } while ((t & TIMER_INT_TOS) == 0);
51  
52 /* leave the timer disabled */
53 SW_WRITE_REG(SWITCH_REG_TIMER, TIMER_PERIOD_DEFAULT);
54 SW_WRITE_REG(SWITCH_REG_TIMER_INT, (TIMER_INT_TOS | TIMER_INT_TOM));
55 }
56  
57 void __init adm5120_soc_init(void)
58 {
59 u32 code;
60 u32 clks;
61  
62 code = SW_READ_REG(SWITCH_REG_CODE);
63  
64 adm5120_product_code = CODE_GET_PC(code);
65 adm5120_revision = CODE_GET_REV(code);
66 adm5120_package = (CODE_GET_PK(code) == CODE_PK_BGA) ?
67 ADM5120_PACKAGE_BGA : ADM5120_PACKAGE_PQFP;
68 adm5120_nand_boot = CODE_GET_NAB(code);
69  
70 clks = CODE_GET_CLKS(code);
71 adm5120_speed = ADM5120_SPEED_175;
72 if (clks & 1)
73 adm5120_speed += 25000000;
74 if (clks & 2)
75 adm5120_speed += 50000000;
76 }