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175 lines
4.0 KiB
175 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Copyright (c) 2006 Simtec Electronics |
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// Ben Dooks <[email protected]> |
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// |
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// http://armlinux.simtec.co.uk/. |
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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/clk.h> |
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#include <linux/delay.h> |
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#include <linux/device.h> |
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#include <linux/syscore_ops.h> |
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#include <linux/serial_core.h> |
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#include <linux/serial_s3c.h> |
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#include <linux/platform_device.h> |
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#include <linux/io.h> |
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#include <linux/reboot.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/proc-fns.h> |
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#include <asm/irq.h> |
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#include <asm/system_misc.h> |
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#include "map.h" |
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#include "regs-clock.h" |
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#include "regs-gpio.h" |
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#include "cpu.h" |
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#include "devs.h" |
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#include "pm.h" |
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#include "s3c24xx.h" |
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#include "nand-core-s3c24xx.h" |
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#include "regs-dsc-s3c24xx.h" |
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#include "s3c2412-power.h" |
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#ifndef CONFIG_CPU_S3C2412_ONLY |
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void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO; |
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static inline void s3c2412_init_gpio2(void) |
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{ |
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s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10; |
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} |
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#else |
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#define s3c2412_init_gpio2() do { } while(0) |
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#endif |
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/* Initial IO mappings */ |
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static struct map_desc s3c2412_iodesc[] __initdata __maybe_unused = { |
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IODESC_ENT(CLKPWR), |
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IODESC_ENT(TIMER), |
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IODESC_ENT(WATCHDOG), |
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{ |
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.virtual = (unsigned long)S3C2412_VA_SSMC, |
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.pfn = __phys_to_pfn(S3C2412_PA_SSMC), |
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.length = SZ_1M, |
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.type = MT_DEVICE, |
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}, |
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{ |
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.virtual = (unsigned long)S3C2412_VA_EBI, |
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.pfn = __phys_to_pfn(S3C2412_PA_EBI), |
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.length = SZ_1M, |
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.type = MT_DEVICE, |
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}, |
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}; |
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/* uart registration process */ |
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void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no) |
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{ |
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s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no); |
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/* rename devices that are s3c2412/s3c2413 specific */ |
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s3c_device_sdi.name = "s3c2412-sdi"; |
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s3c_device_lcd.name = "s3c2412-lcd"; |
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s3c_nand_setname("s3c2412-nand"); |
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/* alter IRQ of SDI controller */ |
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s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI; |
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s3c_device_sdi.resource[1].end = IRQ_S3C2412_SDI; |
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/* spi channel related changes, s3c2412/13 specific */ |
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s3c_device_spi0.name = "s3c2412-spi"; |
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s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24; |
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s3c_device_spi1.name = "s3c2412-spi"; |
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s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1; |
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s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24; |
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} |
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/* s3c2412_idle |
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* |
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* use the standard idle call by ensuring the idle mode |
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* in power config, then issuing the idle co-processor |
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* instruction |
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*/ |
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static void s3c2412_idle(void) |
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{ |
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unsigned long tmp; |
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/* ensure our idle mode is to go to idle */ |
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tmp = __raw_readl(S3C2412_PWRCFG); |
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tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; |
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tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; |
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__raw_writel(tmp, S3C2412_PWRCFG); |
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cpu_do_idle(); |
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} |
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/* s3c2412_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 s3c2412_map_io(void) |
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{ |
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/* move base of IO */ |
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s3c2412_init_gpio2(); |
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/* set our idle function */ |
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arm_pm_idle = s3c2412_idle; |
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/* register our io-tables */ |
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iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc)); |
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} |
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/* need to register the subsystem before we actually register the device, and |
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* we also need to ensure that it has been initialised before any of the |
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* drivers even try to use it (even if not on an s3c2412 based system) |
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* as a driver which may support both 2410 and 2440 may try and use it. |
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*/ |
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struct bus_type s3c2412_subsys = { |
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.name = "s3c2412-core", |
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.dev_name = "s3c2412-core", |
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}; |
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static int __init s3c2412_core_init(void) |
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{ |
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return subsys_system_register(&s3c2412_subsys, NULL); |
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} |
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core_initcall(s3c2412_core_init); |
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static struct device s3c2412_dev = { |
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.bus = &s3c2412_subsys, |
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}; |
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int __init s3c2412_init(void) |
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{ |
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printk("S3C2412: Initialising architecture\n"); |
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#ifdef CONFIG_PM_SLEEP |
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register_syscore_ops(&s3c2412_pm_syscore_ops); |
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register_syscore_ops(&s3c24xx_irq_syscore_ops); |
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#endif |
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return device_register(&s3c2412_dev); |
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}
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