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kernel/linux-rt-4.4.41/arch/arm/mach-nomadik/cpu-8815.c 4.54 KB
5113f6f70   김현기   kernel add
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  /*
   * Copyright STMicroelectronics, 2007.
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  #include <linux/types.h>
  #include <linux/init.h>
  #include <linux/device.h>
  #include <linux/amba/bus.h>
  #include <linux/platform_device.h>
  #include <linux/io.h>
  #include <linux/slab.h>
  #include <linux/irq.h>
  #include <linux/dma-mapping.h>
  #include <linux/of_irq.h>
  #include <linux/of_address.h>
  #include <linux/of_platform.h>
  
  #include <asm/mach/arch.h>
  #include <asm/mach/map.h>
  #include <asm/mach/time.h>
  #include <asm/mach-types.h>
  
  #include <asm/cacheflush.h>
  #include <asm/hardware/cache-l2x0.h>
  
  /*
   * These are the only hard-coded address offsets we still have to use.
   */
  #define NOMADIK_FSMC_BASE	0x10100000	/* FSMC registers */
  #define NOMADIK_SDRAMC_BASE	0x10110000	/* SDRAM Controller */
  #define NOMADIK_CLCDC_BASE	0x10120000	/* CLCD Controller */
  #define NOMADIK_MDIF_BASE	0x10120000	/* MDIF */
  #define NOMADIK_DMA0_BASE	0x10130000	/* DMA0 Controller */
  #define NOMADIK_IC_BASE		0x10140000	/* Vectored Irq Controller */
  #define NOMADIK_DMA1_BASE	0x10150000	/* DMA1 Controller */
  #define NOMADIK_USB_BASE	0x10170000	/* USB-OTG conf reg base */
  #define NOMADIK_CRYP_BASE	0x10180000	/* Crypto processor */
  #define NOMADIK_SHA1_BASE	0x10190000	/* SHA-1 Processor */
  #define NOMADIK_XTI_BASE	0x101A0000	/* XTI */
  #define NOMADIK_RNG_BASE	0x101B0000	/* Random number generator */
  #define NOMADIK_SRC_BASE	0x101E0000	/* SRC base */
  #define NOMADIK_WDOG_BASE	0x101E1000	/* Watchdog */
  #define NOMADIK_MTU0_BASE	0x101E2000	/* Multiple Timer 0 */
  #define NOMADIK_MTU1_BASE	0x101E3000	/* Multiple Timer 1 */
  #define NOMADIK_GPIO0_BASE	0x101E4000	/* GPIO0 */
  #define NOMADIK_GPIO1_BASE	0x101E5000	/* GPIO1 */
  #define NOMADIK_GPIO2_BASE	0x101E6000	/* GPIO2 */
  #define NOMADIK_GPIO3_BASE	0x101E7000	/* GPIO3 */
  #define NOMADIK_RTC_BASE	0x101E8000	/* Real Time Clock base */
  #define NOMADIK_PMU_BASE	0x101E9000	/* Power Management Unit */
  #define NOMADIK_OWM_BASE	0x101EA000	/* One wire master */
  #define NOMADIK_SCR_BASE	0x101EF000	/* Secure Control registers */
  #define NOMADIK_MSP2_BASE	0x101F0000	/* MSP 2 interface */
  #define NOMADIK_MSP1_BASE	0x101F1000	/* MSP 1 interface */
  #define NOMADIK_UART2_BASE	0x101F2000	/* UART 2 interface */
  #define NOMADIK_SSIRx_BASE	0x101F3000	/* SSI 8-ch rx interface */
  #define NOMADIK_SSITx_BASE	0x101F4000	/* SSI 8-ch tx interface */
  #define NOMADIK_MSHC_BASE	0x101F5000	/* Memory Stick(Pro) Host */
  #define NOMADIK_SDI_BASE	0x101F6000	/* SD-card/MM-Card */
  #define NOMADIK_I2C1_BASE	0x101F7000	/* I2C1 interface */
  #define NOMADIK_I2C0_BASE	0x101F8000	/* I2C0 interface */
  #define NOMADIK_MSP0_BASE	0x101F9000	/* MSP 0 interface */
  #define NOMADIK_FIRDA_BASE	0x101FA000	/* FIrDA interface */
  #define NOMADIK_UART1_BASE	0x101FB000	/* UART 1 interface */
  #define NOMADIK_SSP_BASE	0x101FC000	/* SSP interface */
  #define NOMADIK_UART0_BASE	0x101FD000	/* UART 0 interface */
  #define NOMADIK_SGA_BASE	0x101FE000	/* SGA interface */
  #define NOMADIK_L2CC_BASE	0x10210000	/* L2 Cache controller */
  #define NOMADIK_UART1_VBASE	0xF01FB000
  
  /* This is needed for LL-debug/earlyprintk/debug-macro.S */
  static struct map_desc cpu8815_io_desc[] __initdata = {
  	{
  		.virtual =	NOMADIK_UART1_VBASE,
  		.pfn =		__phys_to_pfn(NOMADIK_UART1_BASE),
  		.length =	SZ_4K,
  		.type =		MT_DEVICE,
  	},
  };
  
  static void __init cpu8815_map_io(void)
  {
  	iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc));
  }
  
  static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
  {
  	void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K);
  
  	/* FIXME: use egpio when implemented */
  
  	/* Write anything to Reset status register */
  	writel(1, srcbase + 0x18);
  }
  
  static const char * cpu8815_board_compat[] = {
  	"st,nomadik-nhk-15",
  	"calaosystems,usb-s8815",
  	NULL,
  };
  
  DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815")
  	.l2c_aux_val	= 0,
  	.l2c_aux_mask	= ~0,
  	.map_io		= cpu8815_map_io,
  	.restart	= cpu8815_restart,
  	.dt_compat      = cpu8815_board_compat,
  MACHINE_END