/* linux/arch/arm/mach-s3c2410/s3c2440.c
*
* Copyright (c) 2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* Samsung S3C2440 Mobile CPU support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Modifications:
* 24-Aug-2004 BJD Start of s3c2440 support
* 12-Oct-2004 BJD Moved clock info out to clock.c
* 01-Nov-2004 BJD Fixed clock build code
* 09-Nov-2004 BJD Added sysdev for power management
* 04-Nov-2004 BJD New serial registration
* 15-Nov-2004 BJD Rename the i2c device for the s3c2440
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/sysdev.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware/clock.h>
#include <asm/arch/regs-clock.h>
#include <asm/arch/regs-serial.h>
#include <asm/arch/regs-gpio.h>
#include <asm/arch/regs-gpioj.h>
#include <asm/arch/regs-dsc.h>
#include "s3c2440.h"
#include "clock.h"
#include "devs.h"
#include "cpu.h"
#include "pm.h"
int s3c2440_clock_tick_rate = 12*1000*1000; /* current timers at 12MHz */
/* clock info */
unsigned long s3c2440_hdiv;
static struct map_desc s3c2440_iodesc[] __initdata = {
IODESC_ENT(USBHOST),
IODESC_ENT(CLKPWR),
IODESC_ENT(LCD),
IODESC_ENT(TIMER),
IODESC_ENT(ADC),
};
static struct resource s3c_uart0_resource[] = {
[0] = {
.start = S3C2410_PA_UART0,
.end = S3C2410_PA_UART0 + 0x3fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_S3CUART_RX0,
.end = IRQ_S3CUART_ERR0,
.flags = IORESOURCE_IRQ,
}
};
static struct resource s3c_uart1_resource[] = {
[0] = {
.start = S3C2410_PA_UART1,
.end = S3C2410_PA_UART1 + 0x3fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_S3CUART_RX1,
.end = IRQ_S3CUART_ERR1,
.flags = IORESOURCE_IRQ,
}
};
static struct resource s3c_uart2_resource[] = {
[0] = {
.start = S3C2410_PA_UART2,
.end = S3C2410_PA_UART2 + 0x3fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_S3CUART_RX2,
.end = IRQ_S3CUART_ERR2,
.flags = IORESOURCE_IRQ,
}
};
/* our uart devices */
static struct platform_device s3c_uart0 = {
.name = "s3c2440-uart",
.id = 0,
.num_resources = ARRAY_SIZE(s3c_uart0_resource),
.resource = s3c_uart0_resource,
};
static struct platform_device s3c_uart1 = {
.name = "s3c2440-uart",
.id = 1,
.num_resources = ARRAY_SIZE(s3c_uart1_resource),
.resource = s3c_uart1_resource,
};
static struct platform_device s3c_uart2 = {
.name = "s3c2440-uart",
.id = 2,
.num_resources = ARRAY_SIZE(s3c_uart2_resource),
.resource = s3c_uart2_resource,
};
static struct platform_device *uart_devices[] __initdata = {
&s3c_uart0,
&s3c_uart1,
&s3c_uart2
};
/* uart initialisation */
static int __initdata s3c2440_uart_count;
void __init s3c2440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
struct platform_device *platdev;
int uart;
for (uart = 0; uart < no; uart++, cfg++) {
platdev = uart_devices[cfg->hwport];
s3c24xx_uart_devs[uart] = platdev;
platdev->dev.platform_data = cfg;
}
s3c2440_uart_count = uart;
}
/* s3c2440 specific clock sources */
static struct clk s3c2440_clk_cam = {
.name = "camera",
.enable = s3c2410_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA
};
static struct clk s3c2440_clk_ac97 = {
.name = "ac97",
.enable = s3c2410_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA
};
#ifdef CONFIG_PM
struct sleep_save s3c2440_sleep[] = {
SAVE_ITEM(S3C2440_DSC0),
SAVE_ITEM(S3C2440_DSC1),
SAVE_ITEM(S3C2440_GPJDAT),
SAVE_ITEM(S3C2440_GPJCON),
SAVE_ITEM(S3C2440_GPJUP)
};
static int s3c2440_suspend(struct sys_device *dev, u32 state)
{
s3c2410_pm_do_save(s3c2440_sleep, ARRAY_SIZE(s3c2440_sleep));
return 0;
}
static int s3c2440_resume(struct sys_device *dev)
{
s3c2410_pm_do_restore(s3c2440_sleep, ARRAY_SIZE(s3c2440_sleep));
return 0;
}
#else
#define s3c2440_suspend NULL
#define s3c2440_resume NULL
#endif
static struct sysdev_class s3c2440_sysclass = {
set_kset_name("s3c2440-core"),
.suspend = s3c2440_suspend,
.resume = s3c2440_resume
};
static struct sys_device s3c2440_sysdev = {
.cls = &s3c2440_sysclass,
};
void __init s3c2440_map_io(struct map_desc *mach_desc, int size)
{
unsigned long clkdiv;
unsigned long camdiv;
/* register our io-tables */
iotable_init(s3c2440_iodesc, ARRAY_SIZE(s3c2440_iodesc));
iotable_init(mach_desc, size);
/* now we've got our machine bits initialised, work out what
* clocks we've got */
s3c24xx_fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON),
s3c24xx_xtal) * 2;
clkdiv = __raw_readl(S3C2410_CLKDIVN);
camdiv = __raw_readl(S3C2440_CAMDIVN);
/* work out clock scalings */
switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
case S3C2440_CLKDIVN_HDIVN_1:
s3c2440_hdiv = 1;
break;
case S3C2440_CLKDIVN_HDIVN_2:
s3c2440_hdiv = 1;
break;
case S3C2440_CLKDIVN_HDIVN_4_8:
s3c2440_hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
break;
case S3C2440_CLKDIVN_HDIVN_3_6:
s3c2440_hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
break;
}
s3c24xx_hclk = s3c24xx_fclk / s3c2440_hdiv;
s3c24xx_pclk = s3c24xx_hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
/* print brieft summary of clocks, etc */
printk("S3C2440: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
print_mhz(s3c24xx_fclk), print_mhz(s3c24xx_hclk),
print_mhz(s3c24xx_pclk));
/* initialise the clocks here, to allow other things like the
* console to use them, and to add new ones after the initialisation
*/
s3c2410_init_clocks();
/* add s3c2440 specific clocks */
s3c2440_clk_cam.parent = clk_get(NULL, "hclk");
s3c2440_clk_ac97.parent = clk_get(NULL, "pclk");
s3c2410_register_clock(&s3c2440_clk_ac97);
s3c2410_register_clock(&s3c2440_clk_cam);
clk_disable(&s3c2440_clk_ac97);
clk_disable(&s3c2440_clk_cam);
/* rename any peripherals used differing from the s3c2410 */
s3c_device_i2c.name = "s3c2440-i2c";
}
int __init s3c2440_init(void)
{
int ret;
printk("S3C2440: Initialising architecture\n");
ret = sysdev_class_register(&s3c2440_sysclass);
if (ret == 0)
ret = sysdev_register(&s3c2440_sysdev);
if (ret != 0)
printk(KERN_ERR "failed to register sysdev for s3c2440\n");
if (ret == 0)
ret = platform_add_devices(s3c24xx_uart_devs, s3c2440_uart_count);
return ret;
}
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