arch/arm/mach-omap2/prminst44xx.c

   1 /*
   2  * OMAP4 PRM instance functions
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Paul Walmsley
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/errno.h>
  15 #include <linux/err.h>
  16 #include <linux/io.h>
  17
  18 #include <plat/common.h>
  19
  20 #include "prm44xx.h"
  21 #include "prminst44xx.h"
  22 #include "prm-regbits-44xx.h"
  23 #include "prcm44xx.h"
  24 #include "prcm_mpu44xx.h"
  25
  26 static u32 _prm_bases[OMAP4_MAX_PRCM_PARTITIONS] = {
  27         [OMAP4430_INVALID_PRCM_PARTITION]       = 0,
  28         [OMAP4430_PRM_PARTITION]                = OMAP4430_PRM_BASE,
  29         [OMAP4430_CM1_PARTITION]                = 0,
  30         [OMAP4430_CM2_PARTITION]                = 0,
  31         [OMAP4430_SCRM_PARTITION]               = 0,
  32         [OMAP4430_PRCM_MPU_PARTITION]           = OMAP4430_PRCM_MPU_BASE,
  33 };
  34
  35 /* Read a register in a PRM instance */
  36 u32 omap4_prminst_read_inst_reg(u8 part, s16 inst, u16 idx)
  37 {
  38         BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
  39                part == OMAP4430_INVALID_PRCM_PARTITION ||
  40                !_prm_bases[part]);
  41         return __raw_readl(OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst +
  42                                                idx));
  43 }
  44
  45 /* Write into a register in a PRM instance */
  46 void omap4_prminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx)
  47 {
  48         BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
  49                part == OMAP4430_INVALID_PRCM_PARTITION ||
  50                !_prm_bases[part]);
  51         __raw_writel(val, OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst + idx));
  52 }
  53
  54 /* Read-modify-write a register in PRM. Caller must lock */
  55 u32 omap4_prminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst,
  56                                    s16 idx)
  57 {
  58         u32 v;
  59
  60         v = omap4_prminst_read_inst_reg(part, inst, idx);
  61         v &= ~mask;
  62         v |= bits;
  63         omap4_prminst_write_inst_reg(v, part, inst, idx);
  64
  65         return v;
  66 }