/* linux/arch/arm/mach-s3c2410/s3c2440.c
*
- * Copyright (c) 2004 Simtec Electronics
+ * Copyright (c) 2004-2005 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* Samsung S3C2440 Mobile CPU support
* published by the Free Software Foundation.
*
* Modifications:
- * 24-Aug-2004 BJD Start of s3c2440 support
+ * 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
+ * 14-Jan-2005 BJD Moved clock init code into seperate function
+ * 14-Jan-2005 BJD Removed un-used clock bits
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/sysdev.h>
+#include <linux/clk.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.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_baseclk = 12*1000*1000; /* assume base is 12MHz */
-unsigned long s3c2440_hdiv;
-
-unsigned long s3c2440_fclk;
-unsigned long s3c2440_hclk;
-unsigned long s3c2440_pclk;
static struct map_desc s3c2440_iodesc[] __initdata = {
IODESC_ENT(USBHOST),
IODESC_ENT(LCD),
IODESC_ENT(TIMER),
IODESC_ENT(ADC),
+ IODESC_ENT(WATCHDOG),
};
static struct resource s3c_uart0_resource[] = {
.resource = s3c_uart0_resource,
};
-
static struct platform_device s3c_uart1 = {
.name = "s3c2440-uart",
.id = 1,
&s3c_uart2
};
-void __init s3c2440_map_io(struct map_desc *mach_desc, int size)
+/* uart initialisation */
+
+static int __initdata s3c2440_uart_count;
+
+void __init s3c2440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
- unsigned long tmp;
- unsigned long camdiv;
+ 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;
+}
+
+
+#ifdef CONFIG_PM
+
+static 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, pm_message_t 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
+
+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)
+{
/* register our io-tables */
iotable_init(s3c2440_iodesc, ARRAY_SIZE(s3c2440_iodesc));
iotable_init(mach_desc, size);
+ /* rename any peripherals used differing from the s3c2410 */
+
+ s3c_device_i2c.name = "s3c2440-i2c";
+ s3c_device_nand.name = "s3c2440-nand";
+
+ /* change irq for watchdog */
+
+ s3c_device_wdt.resource[1].start = IRQ_S3C2440_WDT;
+ s3c_device_wdt.resource[1].end = IRQ_S3C2440_WDT;
+}
+
+void __init s3c2440_init_clocks(int xtal)
+{
+ unsigned long clkdiv;
+ unsigned long camdiv;
+ unsigned long hclk, fclk, pclk;
+ int hdiv = 1;
+
/* now we've got our machine bits initialised, work out what
* clocks we've got */
- s3c2440_fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON),
- s3c2440_baseclk);
+ fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2;
- tmp = __raw_readl(S3C2410_CLKDIVN);
+ clkdiv = __raw_readl(S3C2410_CLKDIVN);
camdiv = __raw_readl(S3C2440_CAMDIVN);
/* work out clock scalings */
- switch (tmp & S3C2440_CLKDIVN_HDIVN_MASK) {
+ switch (clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {
case S3C2440_CLKDIVN_HDIVN_1:
- s3c2440_hdiv = 1;
+ hdiv = 1;
break;
case S3C2440_CLKDIVN_HDIVN_2:
- s3c2440_hdiv = 1;
+ hdiv = 2;
break;
case S3C2440_CLKDIVN_HDIVN_4_8:
- s3c2440_hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
+ hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;
break;
case S3C2440_CLKDIVN_HDIVN_3_6:
- s3c2440_hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 6 : 3;
+ hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;
break;
}
- s3c2440_hclk = s3c2440_fclk / s3c2440_hdiv;
- s3c2440_pclk = s3c2440_hclk / ((tmp & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);
+ hclk = fclk / hdiv;
+ pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1);
- /* print brieft summary of clocks, etc */
+ /* print brief summary of clocks, etc */
printk("S3C2440: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
- print_mhz(s3c2440_fclk), print_mhz(s3c2440_hclk),
- print_mhz(s3c2440_pclk));
+ print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
+
+ /* initialise the clocks here, to allow other things like the
+ * console to use them, and to add new ones after the initialisation
+ */
+
+ s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
}
+/* need to register class before we actually register the device, and
+ * we also need to ensure that it has been initialised before any of the
+ * drivers even try to use it (even if not on an s3c2440 based system)
+ * as a driver which may support both 2410 and 2440 may try and use it.
+*/
+static int __init s3c2440_core_init(void)
+{
+ return sysdev_class_register(&s3c2440_sysclass);
+}
+
+core_initcall(s3c2440_core_init);
int __init s3c2440_init(void)
{
printk("S3C2440: Initialising architecture\n");
- ret = platform_add_devices(uart_devices, ARRAY_SIZE(uart_devices));
- if (ret)
- return ret;
-
- // todo: board specific inits?
+ ret = sysdev_register(&s3c2440_sysdev);
+ if (ret != 0)
+ printk(KERN_ERR "failed to register sysdev for s3c2440\n");
+ else
+ ret = platform_add_devices(s3c24xx_uart_devs, s3c2440_uart_count);
return ret;
}
-
git://git.onelab.eu / linux-2.6.git / blobdiff