4 * Copyright (C) 2007 OpenWrt.org
5 * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
13 #include <linux/types.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
18 #include <asm/bootinfo.h>
19 #include <asm/addrspace.h>
21 #include <adm5120_info.h>
22 #include <adm5120_defs.h>
23 #include <adm5120_switch.h>
25 unsigned int adm5120_product_code
;
26 unsigned int adm5120_revision
;
27 unsigned int adm5120_package
;
28 unsigned int adm5120_nand_boot
;
29 unsigned long adm5120_speed
;
32 * CPU settings detection
34 #define CODE_GET_PC(c) ((c) & CODE_PC_MASK)
35 #define CODE_GET_REV(c) (((c) >> CODE_REV_SHIFT) & CODE_REV_MASK)
36 #define CODE_GET_PK(c) (((c) >> CODE_PK_SHIFT) & CODE_PK_MASK)
37 #define CODE_GET_CLKS(c) (((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK)
38 #define CODE_GET_NAB(c) (((c) & CODE_NAB) != 0)
40 void adm5120_ndelay(u32 ns
)
44 SW_WRITE_REG(SWITCH_REG_TIMER
, TIMER_PERIOD_DEFAULT
);
45 SW_WRITE_REG(SWITCH_REG_TIMER_INT
, (TIMER_INT_TOS
| TIMER_INT_TOM
));
48 t
&= TIMER_PERIOD_MASK
;
49 SW_WRITE_REG(SWITCH_REG_TIMER
, t
| TIMER_TE
);
51 /* wait until the timer expires */
53 t
= SW_READ_REG(SWITCH_REG_TIMER_INT
);
54 } while ((t
& TIMER_INT_TOS
) == 0);
56 /* leave the timer disabled */
57 SW_WRITE_REG(SWITCH_REG_TIMER
, TIMER_PERIOD_DEFAULT
);
58 SW_WRITE_REG(SWITCH_REG_TIMER_INT
, (TIMER_INT_TOS
| TIMER_INT_TOM
));
61 void __init
adm5120_soc_init(void)
66 code
= SW_READ_REG(SWITCH_REG_CODE
);
68 adm5120_product_code
= CODE_GET_PC(code
);
69 adm5120_revision
= CODE_GET_REV(code
);
70 adm5120_package
= (CODE_GET_PK(code
) == CODE_PK_BGA
) ?
71 ADM5120_PACKAGE_BGA
: ADM5120_PACKAGE_PQFP
;
72 adm5120_nand_boot
= CODE_GET_NAB(code
);
74 clks
= CODE_GET_CLKS(code
);
75 adm5120_speed
= ADM5120_SPEED_175
;
77 adm5120_speed
+= 25000000;
79 adm5120_speed
+= 50000000;