diff options
Diffstat (limited to 'arch/arm/mach-s3c2410/s3c2440.c')
| -rw-r--r-- | arch/arm/mach-s3c2410/s3c2440.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2410/s3c2440.c b/arch/arm/mach-s3c2410/s3c2440.c new file mode 100644 index 0000000..9a8cc5a --- /dev/null +++ b/arch/arm/mach-s3c2410/s3c2440.c @@ -0,0 +1,281 @@ +/* linux/arch/arm/mach-s3c2410/s3c2440.c + * + * Copyright (c) 2004-2005 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 + * 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/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" + + +static struct map_desc s3c2440_iodesc[] __initdata = { + IODESC_ENT(USBHOST), + IODESC_ENT(CLKPWR), + IODESC_ENT(LCD), + IODESC_ENT(TIMER), + IODESC_ENT(ADC), + IODESC_ENT(WATCHDOG), +}; + +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; +} + + +#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, 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"; + + /* 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 */ + + fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), 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: + hdiv = 1; + break; + + case S3C2440_CLKDIVN_HDIVN_2: + hdiv = 1; + break; + + case S3C2440_CLKDIVN_HDIVN_4_8: + hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4; + break; + + case S3C2440_CLKDIVN_HDIVN_3_6: + hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3; + break; + } + + hclk = fclk / hdiv; + pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1); + + /* print brief summary of clocks, etc */ + + printk("S3C2440: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", + 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. +*/ + +int __init s3c2440_core_init(void) +{ + return sysdev_class_register(&s3c2440_sysclass); +} + +core_initcall(s3c2440_core_init); + +int __init s3c2440_init(void) +{ + int ret; + + printk("S3C2440: Initialising architecture\n"); + + 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; +} |
