drivers/bcma/driver_chipcommon_pmu.c

   1 /*
   2  * Broadcom specific AMBA
   3  * ChipCommon Power Management Unit driver
   4  *
   5  * Copyright 2009, Michael Buesch <mb@bu3sch.de>
   6  * Copyright 2007, Broadcom Corporation
   7  *
   8  * Licensed under the GNU/GPL. See COPYING for details.
   9  */
  10
  11 #include "bcma_private.h"
  12 #include <linux/bcma/bcma.h>
  13
  14 static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
  15                                         u32 offset, u32 mask, u32 set)
  16 {
  17         u32 value;
  18
  19         bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
  20         bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
  21         bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
  22         value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
  23         value &= mask;
  24         value |= set;
  25         bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
  26         bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
  27 }
  28
  29 static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
  30 {
  31         struct bcma_bus *bus = cc->core->bus;
  32
  33         switch (bus->chipinfo.id) {
  34         case 0x4313:
  35         case 0x4331:
  36         case 43224:
  37         case 43225:
  38                 break;
  39         default:
  40                 pr_err("PLL init unknown for device 0x%04X\n",
  41                         bus->chipinfo.id);
  42         }
  43 }
  44
  45 static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
  46 {
  47         struct bcma_bus *bus = cc->core->bus;
  48         u32 min_msk = 0, max_msk = 0;
  49
  50         switch (bus->chipinfo.id) {
  51         case 0x4313:
  52                 min_msk = 0x200D;
  53                 max_msk = 0xFFFF;
  54                 break;
  55         case 43224:
  56                 break;
  57         default:
  58                 pr_err("PMU resource config unknown for device 0x%04X\n",
  59                         bus->chipinfo.id);
  60         }
  61
  62         /* Set the resource masks. */
  63         if (min_msk)
  64                 bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
  65         if (max_msk)
  66                 bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
  67 }
  68
  69 void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
  70 {
  71         struct bcma_bus *bus = cc->core->bus;
  72
  73         switch (bus->chipinfo.id) {
  74         case 0x4313:
  75         case 0x4331:
  76         case 43224:
  77                 break;
  78         default:
  79                 pr_err("PMU switch/regulators init unknown for device "
  80                         "0x%04X\n", bus->chipinfo.id);
  81         }
  82 }
  83
  84 void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
  85 {
  86         struct bcma_bus *bus = cc->core->bus;
  87
  88         switch (bus->chipinfo.id) {
  89         case 0x4313:
  90                 bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
  91                 break;
  92         case 0x4331:
  93                 pr_err("Enabling Ext PA lines not implemented\n");
  94                 break;
  95         case 43224:
  96                 if (bus->chipinfo.rev == 0) {
  97                         pr_err("Workarounds for 43224 rev 0 not fully "
  98                                 "implemented\n");
  99                         bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
 100                 } else {
 101                         bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
 102                 }
 103                 break;
 104         default:
 105                 pr_err("Workarounds unknown for device 0x%04X\n",
 106                         bus->chipinfo.id);
 107         }
 108 }
 109
 110 void bcma_pmu_init(struct bcma_drv_cc *cc)
 111 {
 112         u32 pmucap;
 113
 114         pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
 115         cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
 116
 117         pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
 118                  pmucap);
 119
 120         if (cc->pmu.rev == 1)
 121                 bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
 122                               ~BCMA_CC_PMU_CTL_NOILPONW);
 123         else
 124                 bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
 125                              BCMA_CC_PMU_CTL_NOILPONW);
 126
 127         if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
 128                 pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
 129
 130         bcma_pmu_pll_init(cc);
 131         bcma_pmu_resources_init(cc);
 132         bcma_pmu_swreg_init(cc);
 133         bcma_pmu_workarounds(cc);
 134 }