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| Source at commit 694c7fbe86b8a9c91392e505afcb9fcfc91deccc created 12 years 6 months ago. By Maarten ter Huurne, MIPS: JZ4740: Add cpufreq support | |
|---|---|
| 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 | |
| 21 | #include <asm/bootinfo.h> |
| 22 | |
| 23 | #include <asm/mach-jz4740/base.h> |
| 24 | |
| 25 | #include "reset.h" |
| 26 | |
| 27 | |
| 28 | #define JZ4740_EMC_SDRAM_CTRL 0x80 |
| 29 | |
| 30 | |
| 31 | static void __init jz4740_detect_mem(void) |
| 32 | { |
| 33 | void __iomem *jz_emc_base; |
| 34 | u32 ctrl, bus, bank, rows, cols; |
| 35 | phys_t size; |
| 36 | |
| 37 | jz_emc_base = ioremap(JZ4740_EMC_BASE_ADDR, 0x100); |
| 38 | ctrl = readl(jz_emc_base + JZ4740_EMC_SDRAM_CTRL); |
| 39 | bus = 2 - ((ctrl >> 31) & 1); |
| 40 | bank = 1 + ((ctrl >> 19) & 1); |
| 41 | cols = 8 + ((ctrl >> 26) & 7); |
| 42 | rows = 11 + ((ctrl >> 20) & 3); |
| 43 | printk(KERN_DEBUG |
| 44 | "SDRAM preconfigured: bus:%u bank:%u rows:%u cols:%u\n", |
| 45 | bus, bank, rows, cols); |
| 46 | iounmap(jz_emc_base); |
| 47 | |
| 48 | size = 1 << (bus + bank + cols + rows); |
| 49 | add_memory_region(0, size, BOOT_MEM_RAM); |
| 50 | } |
| 51 | |
| 52 | void __init plat_mem_setup(void) |
| 53 | { |
| 54 | jz4740_reset_init(); |
| 55 | jz4740_detect_mem(); |
| 56 | } |
| 57 | |
| 58 | const char *get_system_type(void) |
| 59 | { |
| 60 | return "JZ4740"; |
| 61 | } |
| 62 | |
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
