1 /* linux/arch/arm/plat-s3c24xx/s3c244x.c
3 * Copyright (c) 2004-2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * Samsung S3C2440 and S3C2442 Mobile CPU support (not S3C2443)
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 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/list.h>
17 #include <linux/timer.h>
18 #include <linux/init.h>
19 #include <linux/serial_core.h>
20 #include <linux/platform_device.h>
21 #include <linux/sysdev.h>
22 #include <linux/clk.h>
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach/irq.h>
29 #include <mach/hardware.h>
32 #include <plat/cpu-freq.h>
34 #include <mach/regs-clock.h>
35 #include <plat/regs-serial.h>
36 #include <mach/regs-gpio.h>
37 #include <mach/regs-gpioj.h>
38 #include <mach/regs-dsc.h>
40 #include <plat/s3c2410.h>
41 #include <plat/s3c2440.h>
43 #include <plat/clock.h>
44 #include <plat/devs.h>
49 static struct map_desc s3c244x_iodesc
[] __initdata
= {
55 /* uart initialisation */
57 void __init
s3c244x_init_uarts(struct s3c2410_uartcfg
*cfg
, int no
)
59 s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources
, cfg
, no
);
62 extern struct platform_device s3c_device_ts
;
64 void __init
s3c244x_map_io(void)
66 /* register our io-tables */
68 iotable_init(s3c244x_iodesc
, ARRAY_SIZE(s3c244x_iodesc
));
70 /* rename any peripherals used differing from the s3c2410 */
72 s3c_device_sdi
.name
= "s3c2440-sdi";
73 s3c_device_i2c0
.name
= "s3c2440-i2c";
74 s3c_device_nand
.name
= "s3c2440-nand";
75 s3c_device_ts
.name
= "s3c2440-ts";
76 s3c_device_usbgadget
.name
= "s3c2440-usbgadget";
79 void __init_or_cpufreq
s3c244x_setup_clocks(void)
85 unsigned long hclk
, fclk
, pclk
;
88 xtal_clk
= clk_get(NULL
, "xtal");
89 xtal
= clk_get_rate(xtal_clk
);
92 fclk
= s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON
), xtal
) * 2;
94 clkdiv
= __raw_readl(S3C2410_CLKDIVN
);
95 camdiv
= __raw_readl(S3C2440_CAMDIVN
);
97 /* work out clock scalings */
99 switch (clkdiv
& S3C2440_CLKDIVN_HDIVN_MASK
) {
100 case S3C2440_CLKDIVN_HDIVN_1
:
104 case S3C2440_CLKDIVN_HDIVN_2
:
108 case S3C2440_CLKDIVN_HDIVN_4_8
:
109 hdiv
= (camdiv
& S3C2440_CAMDIVN_HCLK4_HALF
) ? 8 : 4;
112 case S3C2440_CLKDIVN_HDIVN_3_6
:
113 hdiv
= (camdiv
& S3C2440_CAMDIVN_HCLK3_HALF
) ? 6 : 3;
118 pclk
= hclk
/ ((clkdiv
& S3C2440_CLKDIVN_PDIVN
) ? 2 : 1);
120 /* print brief summary of clocks, etc */
122 printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
123 print_mhz(fclk
), print_mhz(hclk
), print_mhz(pclk
));
125 s3c24xx_setup_clocks(fclk
, hclk
, pclk
);
128 void __init
s3c244x_init_clocks(int xtal
)
130 /* initialise the clocks here, to allow other things like the
131 * console to use them, and to add new ones after the initialisation
134 s3c24xx_register_baseclocks(xtal
);
135 s3c244x_setup_clocks();
136 s3c2410_baseclk_add();
141 static struct sleep_save s3c244x_sleep
[] = {
142 SAVE_ITEM(S3C2440_DSC0
),
143 SAVE_ITEM(S3C2440_DSC1
),
144 SAVE_ITEM(S3C2440_GPJDAT
),
145 SAVE_ITEM(S3C2440_GPJCON
),
146 SAVE_ITEM(S3C2440_GPJUP
)
149 static int s3c244x_suspend(struct sys_device
*dev
, pm_message_t state
)
151 s3c_pm_do_save(s3c244x_sleep
, ARRAY_SIZE(s3c244x_sleep
));
155 static int s3c244x_resume(struct sys_device
*dev
)
157 s3c_pm_do_restore(s3c244x_sleep
, ARRAY_SIZE(s3c244x_sleep
));
162 #define s3c244x_suspend NULL
163 #define s3c244x_resume NULL
166 /* Since the S3C2442 and S3C2440 share items, put both sysclasses here */
168 struct sysdev_class s3c2440_sysclass
= {
169 .name
= "s3c2440-core",
170 .suspend
= s3c244x_suspend
,
171 .resume
= s3c244x_resume
174 struct sysdev_class s3c2442_sysclass
= {
175 .name
= "s3c2442-core",
176 .suspend
= s3c244x_suspend
,
177 .resume
= s3c244x_resume
180 /* need to register class before we actually register the device, and
181 * we also need to ensure that it has been initialised before any of the
182 * drivers even try to use it (even if not on an s3c2440 based system)
183 * as a driver which may support both 2410 and 2440 may try and use it.
186 static int __init
s3c2440_core_init(void)
188 return sysdev_class_register(&s3c2440_sysclass
);
191 core_initcall(s3c2440_core_init
);
193 static int __init
s3c2442_core_init(void)
195 return sysdev_class_register(&s3c2442_sysclass
);
198 core_initcall(s3c2442_core_init
);