iomux-v3.c 2.2 KB

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  1. /*
  2. * Based on the iomux-v3.c from Linux kernel:
  3. * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
  4. * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
  5. * <armlinux@phytec.de>
  6. *
  7. * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
  8. *
  9. * This program is free software; you can redistribute it and/or
  10. * modify it under the terms of the GNU General Public License
  11. * as published by the Free Software Foundation; either version 2
  12. * of the License, or (at your option) any later version.
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  21. * MA 02110-1301, USA.
  22. */
  23. #include <common.h>
  24. #include <asm/io.h>
  25. #include <asm/arch/imx-regs.h>
  26. #include <asm/imx-common/iomux-v3.h>
  27. static void *base = (void *)IOMUXC_BASE_ADDR;
  28. /*
  29. * configures a single pad in the iomuxer
  30. */
  31. void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
  32. {
  33. u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
  34. u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
  35. u32 sel_input_ofs =
  36. (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
  37. u32 sel_input =
  38. (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
  39. u32 pad_ctrl_ofs =
  40. (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
  41. u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
  42. if (mux_ctrl_ofs)
  43. __raw_writel(mux_mode, base + mux_ctrl_ofs);
  44. if (sel_input_ofs)
  45. __raw_writel(sel_input, base + sel_input_ofs);
  46. #ifdef CONFIG_IOMUX_SHARE_CONF_REG
  47. if (!(pad_ctrl & NO_PAD_CTRL))
  48. __raw_writel((mux_mode << PAD_MUX_MODE_SHIFT) | pad_ctrl,
  49. base + pad_ctrl_ofs);
  50. #else
  51. if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
  52. __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
  53. #endif
  54. }
  55. void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
  56. unsigned count)
  57. {
  58. iomux_v3_cfg_t const *p = pad_list;
  59. int i;
  60. for (i = 0; i < count; i++)
  61. imx_iomux_v3_setup_pad(*p++);
  62. }