Root/
Source at commit 308eb78115de485aca7ffd594cd9b373f1b87ce3 created 10 years 10 months ago. By Lars-Peter Clausen, devicetree stuff | |
---|---|
1 | /* |
2 | * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> |
3 | * Copyright (C) 2011, Maarten ter Huurne <maarten@treewalker.org> |
4 | * JZ4740 setup code |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the |
8 | * Free Software Foundation; either version 2 of the License, or (at your |
9 | * option) any later version. |
10 | * |
11 | * You should have received a copy of the GNU General Public License along |
12 | * with this program; if not, write to the Free Software Foundation, Inc., |
13 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
14 | * |
15 | */ |
16 | |
17 | #include <linux/init.h> |
18 | #include <linux/io.h> |
19 | #include <linux/kernel.h> |
20 | #include <linux/of_platform.h> |
21 | #include <linux/of_fdt.h> |
22 | |
23 | #include <asm/bootinfo.h> |
24 | #include <asm/mips-boards/generic.h> |
25 | #include <asm/prom.h> |
26 | |
27 | #include <asm/mach-jz4740/base.h> |
28 | |
29 | #include "reset.h" |
30 | |
31 | |
32 | #define JZ4740_EMC_SDRAM_CTRL 0x80 |
33 | |
34 | static void __init jz4740_detect_mem(void) |
35 | { |
36 | void __iomem *jz_emc_base; |
37 | u32 ctrl, bus, bank, rows, cols; |
38 | phys_t size; |
39 | |
40 | jz_emc_base = ioremap(JZ4740_EMC_BASE_ADDR, 0x100); |
41 | ctrl = readl(jz_emc_base + JZ4740_EMC_SDRAM_CTRL); |
42 | bus = 2 - ((ctrl >> 31) & 1); |
43 | bank = 1 + ((ctrl >> 19) & 1); |
44 | cols = 8 + ((ctrl >> 26) & 7); |
45 | rows = 11 + ((ctrl >> 20) & 3); |
46 | printk(KERN_DEBUG |
47 | "SDRAM preconfigured: bus:%u bank:%u rows:%u cols:%u\n", |
48 | bus, bank, rows, cols); |
49 | iounmap(jz_emc_base); |
50 | |
51 | size = 1 << (bus + bank + cols + rows); |
52 | add_memory_region(0, size, BOOT_MEM_RAM); |
53 | } |
54 | |
55 | void __init plat_mem_setup(void) |
56 | { |
57 | jz4740_reset_init(); |
58 | jz4740_detect_mem(); |
59 | __dt_setup_arch(&__dtb_start); |
60 | } |
61 | |
62 | const char *get_system_type(void) |
63 | { |
64 | return "JZ4740"; |
65 | } |
66 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9