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pll.h

/* arch/arm/plat-s5p/include/plat/pll.h
 *
 * Copyright (c) 2009 Samsung Electronics Co., Ltd.
 *          http://www.samsung.com/
 *
 * S5P PLL code
 *
 * Based on arch/arm/plat-s3c64xx/include/plat/pll.h
 *
 * 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.
*/

#define PLL45XX_MDIV_MASK     (0x3FF)
#define PLL45XX_PDIV_MASK     (0x3F)
#define PLL45XX_SDIV_MASK     (0x7)
#define PLL45XX_MDIV_SHIFT    (16)
#define PLL45XX_PDIV_SHIFT    (8)
#define PLL45XX_SDIV_SHIFT    (0)

#include <asm/div64.h>

enum pll45xx_type_t {
      pll_4500,
      pll_4502,
      pll_4508
};

static inline unsigned long s5p_get_pll45xx(unsigned long baseclk, u32 pll_con,
                                  enum pll45xx_type_t pll_type)
{
      u32 mdiv, pdiv, sdiv;
      u64 fvco = baseclk;

      mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
      pdiv = (pll_con >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
      sdiv = (pll_con >> PLL45XX_SDIV_SHIFT) & PLL45XX_SDIV_MASK;

      if (pll_type == pll_4508)
            sdiv = sdiv - 1;

      fvco *= mdiv;
      do_div(fvco, (pdiv << sdiv));

      return (unsigned long)fvco;
}

#define PLL46XX_KDIV_MASK     (0xFFFF)
#define PLL4650C_KDIV_MASK    (0xFFF)
#define PLL46XX_MDIV_MASK     (0x1FF)
#define PLL46XX_PDIV_MASK     (0x3F)
#define PLL46XX_SDIV_MASK     (0x7)
#define PLL46XX_MDIV_SHIFT    (16)
#define PLL46XX_PDIV_SHIFT    (8)
#define PLL46XX_SDIV_SHIFT    (0)

enum pll46xx_type_t {
      pll_4600,
      pll_4650,
      pll_4650c,
};

static inline unsigned long s5p_get_pll46xx(unsigned long baseclk,
                                  u32 pll_con0, u32 pll_con1,
                                  enum pll46xx_type_t pll_type)
{
      unsigned long result;
      u32 mdiv, pdiv, sdiv, kdiv;
      u64 tmp;

      mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
      pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
      sdiv = (pll_con0 >> PLL46XX_SDIV_SHIFT) & PLL46XX_SDIV_MASK;
      kdiv = pll_con1 & PLL46XX_KDIV_MASK;

      if (pll_type == pll_4650c)
            kdiv = pll_con1 & PLL4650C_KDIV_MASK;
      else
            kdiv = pll_con1 & PLL46XX_KDIV_MASK;

      tmp = baseclk;

      if (pll_type == pll_4600) {
            tmp *= (mdiv << 16) + kdiv;
            do_div(tmp, (pdiv << sdiv));
            result = tmp >> 16;
      } else {
            tmp *= (mdiv << 10) + kdiv;
            do_div(tmp, (pdiv << sdiv));
            result = tmp >> 10;
      }

      return result;
}

#define PLL90XX_MDIV_MASK     (0xFF)
#define PLL90XX_PDIV_MASK     (0x3F)
#define PLL90XX_SDIV_MASK     (0x7)
#define PLL90XX_KDIV_MASK     (0xffff)
#define PLL90XX_MDIV_SHIFT    (16)
#define PLL90XX_PDIV_SHIFT    (8)
#define PLL90XX_SDIV_SHIFT    (0)
#define PLL90XX_KDIV_SHIFT    (0)

static inline unsigned long s5p_get_pll90xx(unsigned long baseclk,
                                  u32 pll_con, u32 pll_conk)
{
      unsigned long result;
      u32 mdiv, pdiv, sdiv, kdiv;
      u64 tmp;

      mdiv = (pll_con >> PLL90XX_MDIV_SHIFT) & PLL90XX_MDIV_MASK;
      pdiv = (pll_con >> PLL90XX_PDIV_SHIFT) & PLL90XX_PDIV_MASK;
      sdiv = (pll_con >> PLL90XX_SDIV_SHIFT) & PLL90XX_SDIV_MASK;
      kdiv = pll_conk & PLL90XX_KDIV_MASK;

      /* We need to multiple baseclk by mdiv (the integer part) and kdiv
       * which is in 2^16ths, so shift mdiv up (does not overflow) and
       * add kdiv before multiplying. The use of tmp is to avoid any
       * overflows before shifting bac down into result when multipling
       * by the mdiv and kdiv pair.
       */

      tmp = baseclk;
      tmp *= (mdiv << 16) + kdiv;
      do_div(tmp, (pdiv << sdiv));
      result = tmp >> 16;

      return result;
}

#define PLL65XX_MDIV_MASK     (0x3FF)
#define PLL65XX_PDIV_MASK     (0x3F)
#define PLL65XX_SDIV_MASK     (0x7)
#define PLL65XX_MDIV_SHIFT    (16)
#define PLL65XX_PDIV_SHIFT    (8)
#define PLL65XX_SDIV_SHIFT    (0)

static inline unsigned long s5p_get_pll65xx(unsigned long baseclk, u32 pll_con)
{
      u32 mdiv, pdiv, sdiv;
      u64 fvco = baseclk;

      mdiv = (pll_con >> PLL65XX_MDIV_SHIFT) & PLL65XX_MDIV_MASK;
      pdiv = (pll_con >> PLL65XX_PDIV_SHIFT) & PLL65XX_PDIV_MASK;
      sdiv = (pll_con >> PLL65XX_SDIV_SHIFT) & PLL65XX_SDIV_MASK;

      fvco *= mdiv;
      do_div(fvco, (pdiv << sdiv));

      return (unsigned long)fvco;
}

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