arch/mips/bcm63xx/reset.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/export.h>
  11 #include <linux/mutex.h>
  12 #include <linux/err.h>
  13 #include <linux/clk.h>
  14 #include <linux/delay.h>
  15 #include <bcm63xx_cpu.h>
  16 #include <bcm63xx_io.h>
  17 #include <bcm63xx_regs.h>
  18 #include <bcm63xx_reset.h>
  19
  20 #define __GEN_RESET_BITS_TABLE(__cpu)                                   \
  21         [BCM63XX_RESET_SPI]             = BCM## __cpu ##_RESET_SPI,     \
  22         [BCM63XX_RESET_ENET]            = BCM## __cpu ##_RESET_ENET,    \
  23         [BCM63XX_RESET_USBH]            = BCM## __cpu ##_RESET_USBH,    \
  24         [BCM63XX_RESET_USBD]            = BCM## __cpu ##_RESET_USBD,    \
  25         [BCM63XX_RESET_DSL]             = BCM## __cpu ##_RESET_DSL,     \
  26         [BCM63XX_RESET_SAR]             = BCM## __cpu ##_RESET_SAR,     \
  27         [BCM63XX_RESET_EPHY]            = BCM## __cpu ##_RESET_EPHY,    \
  28         [BCM63XX_RESET_ENETSW]          = BCM## __cpu ##_RESET_ENETSW,  \
  29         [BCM63XX_RESET_PCM]             = BCM## __cpu ##_RESET_PCM,     \
  30         [BCM63XX_RESET_MPI]             = BCM## __cpu ##_RESET_MPI,     \
  31         [BCM63XX_RESET_PCIE]            = BCM## __cpu ##_RESET_PCIE,    \
  32         [BCM63XX_RESET_PCIE_EXT]        = BCM## __cpu ##_RESET_PCIE_EXT,
  33
  34 #define BCM3368_RESET_SPI       SOFTRESET_3368_SPI_MASK
  35 #define BCM3368_RESET_ENET      SOFTRESET_3368_ENET_MASK
  36 #define BCM3368_RESET_USBH      0
  37 #define BCM3368_RESET_USBD      SOFTRESET_3368_USBS_MASK
  38 #define BCM3368_RESET_DSL       0
  39 #define BCM3368_RESET_SAR       0
  40 #define BCM3368_RESET_EPHY      SOFTRESET_3368_EPHY_MASK
  41 #define BCM3368_RESET_ENETSW    0
  42 #define BCM3368_RESET_PCM       SOFTRESET_3368_PCM_MASK
  43 #define BCM3368_RESET_MPI       SOFTRESET_3368_MPI_MASK
  44 #define BCM3368_RESET_PCIE      0
  45 #define BCM3368_RESET_PCIE_EXT  0
  46
  47 #define BCM6328_RESET_SPI       SOFTRESET_6328_SPI_MASK
  48 #define BCM6328_RESET_ENET      0
  49 #define BCM6328_RESET_USBH      SOFTRESET_6328_USBH_MASK
  50 #define BCM6328_RESET_USBD      SOFTRESET_6328_USBS_MASK
  51 #define BCM6328_RESET_DSL       0
  52 #define BCM6328_RESET_SAR       SOFTRESET_6328_SAR_MASK
  53 #define BCM6328_RESET_EPHY      SOFTRESET_6328_EPHY_MASK
  54 #define BCM6328_RESET_ENETSW    SOFTRESET_6328_ENETSW_MASK
  55 #define BCM6328_RESET_PCM       SOFTRESET_6328_PCM_MASK
  56 #define BCM6328_RESET_MPI       0
  57 #define BCM6328_RESET_PCIE      \
  58                                 (SOFTRESET_6328_PCIE_MASK |             \
  59                                  SOFTRESET_6328_PCIE_CORE_MASK |        \
  60                                  SOFTRESET_6328_PCIE_HARD_MASK)
  61 #define BCM6328_RESET_PCIE_EXT  SOFTRESET_6328_PCIE_EXT_MASK
  62
  63 #define BCM6338_RESET_SPI       SOFTRESET_6338_SPI_MASK
  64 #define BCM6338_RESET_ENET      SOFTRESET_6338_ENET_MASK
  65 #define BCM6338_RESET_USBH      SOFTRESET_6338_USBH_MASK
  66 #define BCM6338_RESET_USBD      SOFTRESET_6338_USBS_MASK
  67 #define BCM6338_RESET_DSL       SOFTRESET_6338_ADSL_MASK
  68 #define BCM6338_RESET_SAR       SOFTRESET_6338_SAR_MASK
  69 #define BCM6338_RESET_EPHY      0
  70 #define BCM6338_RESET_ENETSW    0
  71 #define BCM6338_RESET_PCM       0
  72 #define BCM6338_RESET_MPI       0
  73 #define BCM6338_RESET_PCIE      0
  74 #define BCM6338_RESET_PCIE_EXT  0
  75
  76 #define BCM6348_RESET_SPI       SOFTRESET_6348_SPI_MASK
  77 #define BCM6348_RESET_ENET      SOFTRESET_6348_ENET_MASK
  78 #define BCM6348_RESET_USBH      SOFTRESET_6348_USBH_MASK
  79 #define BCM6348_RESET_USBD      SOFTRESET_6348_USBS_MASK
  80 #define BCM6348_RESET_DSL       SOFTRESET_6348_ADSL_MASK
  81 #define BCM6348_RESET_SAR       SOFTRESET_6348_SAR_MASK
  82 #define BCM6348_RESET_EPHY      0
  83 #define BCM6348_RESET_ENETSW    0
  84 #define BCM6348_RESET_PCM       0
  85 #define BCM6348_RESET_MPI       0
  86 #define BCM6348_RESET_PCIE      0
  87 #define BCM6348_RESET_PCIE_EXT  0
  88
  89 #define BCM6358_RESET_SPI       SOFTRESET_6358_SPI_MASK
  90 #define BCM6358_RESET_ENET      SOFTRESET_6358_ENET_MASK
  91 #define BCM6358_RESET_USBH      SOFTRESET_6358_USBH_MASK
  92 #define BCM6358_RESET_USBD      0
  93 #define BCM6358_RESET_DSL       SOFTRESET_6358_ADSL_MASK
  94 #define BCM6358_RESET_SAR       SOFTRESET_6358_SAR_MASK
  95 #define BCM6358_RESET_EPHY      SOFTRESET_6358_EPHY_MASK
  96 #define BCM6358_RESET_ENETSW    0
  97 #define BCM6358_RESET_PCM       SOFTRESET_6358_PCM_MASK
  98 #define BCM6358_RESET_MPI       SOFTRESET_6358_MPI_MASK
  99 #define BCM6358_RESET_PCIE      0
 100 #define BCM6358_RESET_PCIE_EXT  0
 101
 102 #define BCM6362_RESET_SPI       SOFTRESET_6362_SPI_MASK
 103 #define BCM6362_RESET_ENET      0
 104 #define BCM6362_RESET_USBH      SOFTRESET_6362_USBH_MASK
 105 #define BCM6362_RESET_USBD      SOFTRESET_6362_USBS_MASK
 106 #define BCM6362_RESET_DSL       0
 107 #define BCM6362_RESET_SAR       SOFTRESET_6362_SAR_MASK
 108 #define BCM6362_RESET_EPHY      SOFTRESET_6362_EPHY_MASK
 109 #define BCM6362_RESET_ENETSW    SOFTRESET_6362_ENETSW_MASK
 110 #define BCM6362_RESET_PCM       SOFTRESET_6362_PCM_MASK
 111 #define BCM6362_RESET_MPI       0
 112 #define BCM6362_RESET_PCIE      (SOFTRESET_6362_PCIE_MASK | \
 113                                  SOFTRESET_6362_PCIE_CORE_MASK)
 114 #define BCM6362_RESET_PCIE_EXT  SOFTRESET_6362_PCIE_EXT_MASK
 115
 116 #define BCM6368_RESET_SPI       SOFTRESET_6368_SPI_MASK
 117 #define BCM6368_RESET_ENET      0
 118 #define BCM6368_RESET_USBH      SOFTRESET_6368_USBH_MASK
 119 #define BCM6368_RESET_USBD      SOFTRESET_6368_USBS_MASK
 120 #define BCM6368_RESET_DSL       0
 121 #define BCM6368_RESET_SAR       SOFTRESET_6368_SAR_MASK
 122 #define BCM6368_RESET_EPHY      SOFTRESET_6368_EPHY_MASK
 123 #define BCM6368_RESET_ENETSW    0
 124 #define BCM6368_RESET_PCM       SOFTRESET_6368_PCM_MASK
 125 #define BCM6368_RESET_MPI       SOFTRESET_6368_MPI_MASK
 126 #define BCM6368_RESET_PCIE      0
 127 #define BCM6368_RESET_PCIE_EXT  0
 128
 129 /*
 130  * core reset bits
 131  */
 132 static const u32 bcm3368_reset_bits[] = {
 133         __GEN_RESET_BITS_TABLE(3368)
 134 };
 135
 136 static const u32 bcm6328_reset_bits[] = {
 137         __GEN_RESET_BITS_TABLE(6328)
 138 };
 139
 140 static const u32 bcm6338_reset_bits[] = {
 141         __GEN_RESET_BITS_TABLE(6338)
 142 };
 143
 144 static const u32 bcm6348_reset_bits[] = {
 145         __GEN_RESET_BITS_TABLE(6348)
 146 };
 147
 148 static const u32 bcm6358_reset_bits[] = {
 149         __GEN_RESET_BITS_TABLE(6358)
 150 };
 151
 152 static const u32 bcm6362_reset_bits[] = {
 153         __GEN_RESET_BITS_TABLE(6362)
 154 };
 155
 156 static const u32 bcm6368_reset_bits[] = {
 157         __GEN_RESET_BITS_TABLE(6368)
 158 };
 159
 160 const u32 *bcm63xx_reset_bits;
 161 static int reset_reg;
 162
 163 static int __init bcm63xx_reset_bits_init(void)
 164 {
 165         if (BCMCPU_IS_3368()) {
 166                 reset_reg = PERF_SOFTRESET_6358_REG;
 167                 bcm63xx_reset_bits = bcm3368_reset_bits;
 168         } else if (BCMCPU_IS_6328()) {
 169                 reset_reg = PERF_SOFTRESET_6328_REG;
 170                 bcm63xx_reset_bits = bcm6328_reset_bits;
 171         } else if (BCMCPU_IS_6338()) {
 172                 reset_reg = PERF_SOFTRESET_REG;
 173                 bcm63xx_reset_bits = bcm6338_reset_bits;
 174         } else if (BCMCPU_IS_6348()) {
 175                 reset_reg = PERF_SOFTRESET_REG;
 176                 bcm63xx_reset_bits = bcm6348_reset_bits;
 177         } else if (BCMCPU_IS_6358()) {
 178                 reset_reg = PERF_SOFTRESET_6358_REG;
 179                 bcm63xx_reset_bits = bcm6358_reset_bits;
 180         } else if (BCMCPU_IS_6362()) {
 181                 reset_reg = PERF_SOFTRESET_6362_REG;
 182                 bcm63xx_reset_bits = bcm6362_reset_bits;
 183         } else if (BCMCPU_IS_6368()) {
 184                 reset_reg = PERF_SOFTRESET_6368_REG;
 185                 bcm63xx_reset_bits = bcm6368_reset_bits;
 186         }
 187
 188         return 0;
 189 }
 190
 191 static DEFINE_SPINLOCK(reset_mutex);
 192
 193 static void __bcm63xx_core_set_reset(u32 mask, int enable)
 194 {
 195         unsigned long flags;
 196         u32 val;
 197
 198         if (!mask)
 199                 return;
 200
 201         spin_lock_irqsave(&reset_mutex, flags);
 202         val = bcm_perf_readl(reset_reg);
 203
 204         if (enable)
 205                 val &= ~mask;
 206         else
 207                 val |= mask;
 208
 209         bcm_perf_writel(val, reset_reg);
 210         spin_unlock_irqrestore(&reset_mutex, flags);
 211 }
 212
 213 void bcm63xx_core_set_reset(enum bcm63xx_core_reset core, int reset)
 214 {
 215         __bcm63xx_core_set_reset(bcm63xx_reset_bits[core], reset);
 216 }
 217 EXPORT_SYMBOL(bcm63xx_core_set_reset);
 218
 219 postcore_initcall(bcm63xx_reset_bits_init);