1 /* linux/arch/arm/mach-s3c2410/s3c2410.c
3 * Copyright (c) 2003-2005 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * http://www.simtec.co.uk/products/EB2410ITX/
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 * 16-May-2003 BJD Created initial version
14 * 16-Aug-2003 BJD Fixed header files and copyright, added URL
15 * 05-Sep-2003 BJD Moved to kernel v2.6
16 * 18-Jan-2004 BJD Added serial port configuration
17 * 21-Aug-2004 BJD Added new struct s3c2410_board handler
18 * 28-Sep-2004 BJD Updates for new serial port bits
19 * 04-Nov-2004 BJD Updated UART configuration process
20 * 10-Jan-2005 BJD Removed s3c2410_clock_tick_rate
21 * 13-Aug-2005 DA Removed UART from initial I/O mappings
24 #include <linux/kernel.h>
25 #include <linux/types.h>
26 #include <linux/interrupt.h>
27 #include <linux/list.h>
28 #include <linux/timer.h>
29 #include <linux/init.h>
30 #include <linux/platform_device.h>
32 #include <asm/mach/arch.h>
33 #include <asm/mach/map.h>
34 #include <asm/mach/irq.h>
36 #include <asm/hardware.h>
40 #include <asm/arch/regs-clock.h>
41 #include <asm/arch/regs-serial.h>
48 /* Initial IO mappings */
50 static struct map_desc s3c2410_iodesc[] __initdata = {
59 /* our uart devices */
61 /* uart registration process */
63 void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
65 s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
70 * register the standard cpu IO areas, and any passed in from the
71 * machine specific initialisation.
74 void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
76 /* register our io-tables */
78 iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
79 iotable_init(mach_desc, mach_size);
82 void __init s3c2410_init_clocks(int xtal)
89 /* now we've got our machine bits initialised, work out what
92 fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
94 tmp = __raw_readl(S3C2410_CLKDIVN);
96 /* work out clock scalings */
98 hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
99 pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
101 /* print brieft summary of clocks, etc */
103 printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
104 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
106 /* initialise the clocks here, to allow other things like the
107 * console to use them
110 s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
113 int __init s3c2410_init(void)
115 printk("S3C2410: Initialising architecture\n");