arch/arm/mach-imx/mach-imx51.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3  * Copyright 2011 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/io.h>
  14 #include <linux/irq.h>
  15 #include <linux/of_irq.h>
  16 #include <linux/of_platform.h>
  17 #include <asm/mach/arch.h>
  18 #include <asm/mach/time.h>
  19
  20 #include "common.h"
  21 #include "hardware.h"
  22
  23 static void __init imx51_init_early(void)
  24 {
  25         mxc_set_cpu_type(MXC_CPU_MX51);
  26 }
  27
  28 /*
  29  * The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
  30  * the Freescale marketing division. However this did not remove the
  31  * hardware from the chip which still needs to be configured for proper
  32  * IPU support.
  33  */
  34 #define MX51_MIPI_HSC_BASE 0x83fdc000
  35 static void __init imx51_ipu_mipi_setup(void)
  36 {
  37         void __iomem *hsc_addr;
  38
  39         hsc_addr = ioremap(MX51_MIPI_HSC_BASE, SZ_16K);
  40         WARN_ON(!hsc_addr);
  41
  42         /* setup MIPI module to legacy mode */
  43         imx_writel(0xf00, hsc_addr);
  44
  45         /* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
  46         imx_writel(imx_readl(hsc_addr + 0x800) | 0x30ff, hsc_addr + 0x800);
  47
  48         iounmap(hsc_addr);
  49 }
  50
  51 static void __init imx51_dt_init(void)
  52 {
  53         imx51_ipu_mipi_setup();
  54         imx_src_init();
  55
  56         imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
  57 }
  58
  59 static void __init imx51_init_late(void)
  60 {
  61         mx51_neon_fixup();
  62         imx51_pm_init();
  63 }
  64
  65 static const char * const imx51_dt_board_compat[] __initconst = {
  66         "fsl,imx51",
  67         NULL
  68 };
  69
  70 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
  71         .init_early     = imx51_init_early,
  72         .init_machine   = imx51_dt_init,
  73         .init_late      = imx51_init_late,
  74         .dt_compat      = imx51_dt_board_compat,
  75 MACHINE_END