![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
201 lines
4.6 KiB
C
201 lines
4.6 KiB
C
/* linux/arch/arm/mach-s3c2410/s3c2410.c
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*
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* Copyright (c) 2003-2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://www.simtec.co.uk/products/EB2410ITX/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Modifications:
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* 16-May-2003 BJD Created initial version
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* 16-Aug-2003 BJD Fixed header files and copyright, added URL
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* 05-Sep-2003 BJD Moved to kernel v2.6
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* 18-Jan-2004 BJD Added serial port configuration
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* 21-Aug-2004 BJD Added new struct s3c2410_board handler
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* 28-Sep-2004 BJD Updates for new serial port bits
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* 04-Nov-2004 BJD Updated UART configuration process
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* 10-Jan-2005 BJD Removed s3c2410_clock_tick_rate
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/arch/regs-clock.h>
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#include <asm/arch/regs-serial.h>
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#include "s3c2410.h"
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#include "cpu.h"
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#include "clock.h"
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/* Initial IO mappings */
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static struct map_desc s3c2410_iodesc[] __initdata = {
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IODESC_ENT(USBHOST),
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IODESC_ENT(CLKPWR),
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IODESC_ENT(LCD),
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IODESC_ENT(UART),
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IODESC_ENT(TIMER),
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IODESC_ENT(ADC),
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IODESC_ENT(WATCHDOG)
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};
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static struct resource s3c_uart0_resource[] = {
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[0] = {
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.start = S3C2410_PA_UART0,
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.end = S3C2410_PA_UART0 + 0x3fff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_S3CUART_RX0,
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.end = IRQ_S3CUART_ERR0,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct resource s3c_uart1_resource[] = {
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[0] = {
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.start = S3C2410_PA_UART1,
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.end = S3C2410_PA_UART1 + 0x3fff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_S3CUART_RX1,
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.end = IRQ_S3CUART_ERR1,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct resource s3c_uart2_resource[] = {
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[0] = {
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.start = S3C2410_PA_UART2,
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.end = S3C2410_PA_UART2 + 0x3fff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_S3CUART_RX2,
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.end = IRQ_S3CUART_ERR2,
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.flags = IORESOURCE_IRQ,
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}
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};
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/* our uart devices */
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static struct platform_device s3c_uart0 = {
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.name = "s3c2410-uart",
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.id = 0,
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.num_resources = ARRAY_SIZE(s3c_uart0_resource),
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.resource = s3c_uart0_resource,
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};
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static struct platform_device s3c_uart1 = {
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.name = "s3c2410-uart",
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.id = 1,
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.num_resources = ARRAY_SIZE(s3c_uart1_resource),
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.resource = s3c_uart1_resource,
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};
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static struct platform_device s3c_uart2 = {
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.name = "s3c2410-uart",
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.id = 2,
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.num_resources = ARRAY_SIZE(s3c_uart2_resource),
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.resource = s3c_uart2_resource,
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};
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static struct platform_device *uart_devices[] __initdata = {
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&s3c_uart0,
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&s3c_uart1,
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&s3c_uart2
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};
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/* store our uart devices for the serial driver console */
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struct platform_device *s3c2410_uart_devices[3];
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static int s3c2410_uart_count = 0;
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/* uart registration process */
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void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
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{
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struct platform_device *platdev;
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int uart;
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for (uart = 0; uart < no; uart++, cfg++) {
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platdev = uart_devices[cfg->hwport];
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s3c24xx_uart_devs[uart] = platdev;
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platdev->dev.platform_data = cfg;
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}
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s3c2410_uart_count = uart;
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}
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/* s3c2410_map_io
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*
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* register the standard cpu IO areas, and any passed in from the
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* machine specific initialisation.
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*/
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void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
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{
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/* register our io-tables */
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iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
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iotable_init(mach_desc, mach_size);
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}
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void __init s3c2410_init_clocks(int xtal)
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{
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unsigned long tmp;
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unsigned long fclk;
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unsigned long hclk;
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unsigned long pclk;
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/* now we've got our machine bits initialised, work out what
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* clocks we've got */
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fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
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tmp = __raw_readl(S3C2410_CLKDIVN);
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/* work out clock scalings */
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hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
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pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
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/* print brieft summary of clocks, etc */
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printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
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print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
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/* initialise the clocks here, to allow other things like the
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* console to use them
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*/
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s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
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}
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int __init s3c2410_init(void)
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{
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printk("S3C2410: Initialising architecture\n");
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return platform_add_devices(s3c24xx_uart_devs, s3c2410_uart_count);
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}
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