/* linux/arch/arm/mach-s3c2410/s3c2410.c
*
- * Copyright (c) 2003 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
+ * Copyright (c) 2003-2005 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
*
* http://www.simtec.co.uk/products/EB2410ITX/
*
* 16-May-2003 BJD Created initial version
* 16-Aug-2003 BJD Fixed header files and copyright, added URL
* 05-Sep-2003 BJD Moved to kernel v2.6
- * 18-Jan-2003 BJD Added serial port configuration
+ * 18-Jan-2004 BJD Added serial port configuration
+ * 21-Aug-2004 BJD Added new struct s3c2410_board handler
+ * 28-Sep-2004 BJD Updates for new serial port bits
+ * 04-Nov-2004 BJD Updated UART configuration process
+ * 10-Jan-2005 BJD Removed s3c2410_clock_tick_rate
*/
#include <linux/kernel.h>
#include <asm/arch/regs-clock.h>
#include <asm/arch/regs-serial.h>
-int s3c2410_clock_tick_rate = 12*1000*1000; /* current timers at 12MHz */
+#include "s3c2410.h"
+#include "cpu.h"
+#include "clock.h"
-/* serial port setup */
-
-struct s3c2410_uartcfg *s3c2410_uartcfgs;
-
-/* clock info */
-
-unsigned long s3c2410_fclk;
-unsigned long s3c2410_hclk;
-unsigned long s3c2410_pclk;
-
-#ifndef MHZ
-#define MHZ (1000*1000)
-#endif
-
-#define print_mhz(m) ((m) / MHZ), ((m / 1000) % 1000)
-
-#define IODESC_ENT(x) { S3C2410_VA_##x, S3C2410_PA_##x, S3C2410_SZ_##x, MT_DEVICE }
+/* Initial IO mappings */
static struct map_desc s3c2410_iodesc[] __initdata = {
- IODESC_ENT(IRQ),
- IODESC_ENT(MEMCTRL),
- IODESC_ENT(USBHOST),
- IODESC_ENT(DMA),
- IODESC_ENT(CLKPWR),
- IODESC_ENT(LCD),
- IODESC_ENT(NAND),
- IODESC_ENT(UART),
- IODESC_ENT(TIMER),
- IODESC_ENT(USBDEV),
- IODESC_ENT(WATCHDOG),
- IODESC_ENT(IIC),
- IODESC_ENT(IIS),
- IODESC_ENT(GPIO),
- IODESC_ENT(RTC),
- IODESC_ENT(ADC),
- IODESC_ENT(SPI),
- IODESC_ENT(SDI)
+ IODESC_ENT(USBHOST),
+ IODESC_ENT(CLKPWR),
+ IODESC_ENT(LCD),
+ IODESC_ENT(UART),
+ IODESC_ENT(TIMER),
+ IODESC_ENT(ADC),
+ IODESC_ENT(WATCHDOG)
};
static struct resource s3c_uart0_resource[] = {
&s3c_uart2
};
-void __init s3c2410_map_io(struct map_desc *mach_desc, int size)
+/* store our uart devices for the serial driver console */
+struct platform_device *s3c2410_uart_devices[3];
+
+static int s3c2410_uart_count = 0;
+
+/* uart registration process */
+
+void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
- unsigned long tmp;
+ 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;
+ }
+
+ s3c2410_uart_count = uart;
+}
+/* s3c2410_map_io
+ *
+ * register the standard cpu IO areas, and any passed in from the
+ * machine specific initialisation.
+*/
+
+void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
+{
/* register our io-tables */
iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
- iotable_init(mach_desc, size);
+ iotable_init(mach_desc, mach_size);
+}
+
+void __init s3c2410_init_clocks(int xtal)
+{
+ unsigned long tmp;
+ unsigned long fclk;
+ unsigned long hclk;
+ unsigned long pclk;
/* now we've got our machine bits initialised, work out what
* clocks we've got */
- s3c2410_fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), 12*MHZ);
+ fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
tmp = __raw_readl(S3C2410_CLKDIVN);
- //printk("tmp=%08x, fclk=%d\n", tmp, s3c2410_fclk);
/* work out clock scalings */
- s3c2410_hclk = s3c2410_fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
- s3c2410_pclk = s3c2410_hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
+ hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
+ pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
/* print brieft summary of clocks, etc */
printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
- print_mhz(s3c2410_fclk), print_mhz(s3c2410_hclk),
- print_mhz(s3c2410_pclk));
-}
+ print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
+ /* initialise the clocks here, to allow other things like the
+ * console to use them
+ */
-static int __init s3c2410_init(void)
-{
- int ret;
+ s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
+}
+int __init s3c2410_init(void)
+{
printk("S3C2410: Initialising architecture\n");
- ret = platform_add_devices(uart_devices, ARRAY_SIZE(uart_devices));
-
- return ret;
+ return platform_add_devices(s3c24xx_uart_devs, s3c2410_uart_count);
}
-
-arch_initcall(s3c2410_init);