bcma: add Broadcom specific AMBA bus driver

[pandora-kernel.git] / drivers / bcma / driver_chipcommon_pmu.c

diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c
new file mode 100644 (file)
index 0000000..f44177a
--- /dev/null
+++ b/drivers/bcma/driver_chipcommon_pmu.c
@@ -0,0 +1,134 @@
+/*
+ * Broadcom specific AMBA
+ * ChipCommon Power Management Unit driver
+ *
+ * Copyright 2009, Michael Buesch <mb@bu3sch.de>
+ * Copyright 2007, Broadcom Corporation
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
+                                       u32 offset, u32 mask, u32 set)
+{
+       u32 value;
+
+       bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
+       bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
+       bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
+       value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
+       value &= mask;
+       value |= set;
+       bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
+       bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
+}
+
+static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
+{
+       struct bcma_bus *bus = cc->core->bus;
+
+       switch (bus->chipinfo.id) {
+       case 0x4313:
+       case 0x4331:
+       case 43224:
+       case 43225:
+               break;
+       default:
+               pr_err("PLL init unknown for device 0x%04X\n",
+                       bus->chipinfo.id);
+       }
+}
+
+static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
+{
+       struct bcma_bus *bus = cc->core->bus;
+       u32 min_msk = 0, max_msk = 0;
+
+       switch (bus->chipinfo.id) {
+       case 0x4313:
+               min_msk = 0x200D;
+               max_msk = 0xFFFF;
+               break;
+       case 43224:
+               break;
+       default:
+               pr_err("PMU resource config unknown for device 0x%04X\n",
+                       bus->chipinfo.id);
+       }
+
+       /* Set the resource masks. */
+       if (min_msk)
+               bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
+       if (max_msk)
+               bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
+}
+
+void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
+{
+       struct bcma_bus *bus = cc->core->bus;
+
+       switch (bus->chipinfo.id) {
+       case 0x4313:
+       case 0x4331:
+       case 43224:
+               break;
+       default:
+               pr_err("PMU switch/regulators init unknown for device "
+                       "0x%04X\n", bus->chipinfo.id);
+       }
+}
+
+void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
+{
+       struct bcma_bus *bus = cc->core->bus;
+
+       switch (bus->chipinfo.id) {
+       case 0x4313:
+               bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
+               break;
+       case 0x4331:
+               pr_err("Enabling Ext PA lines not implemented\n");
+               break;
+       case 43224:
+               if (bus->chipinfo.rev == 0) {
+                       pr_err("Workarounds for 43224 rev 0 not fully "
+                               "implemented\n");
+                       bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
+               } else {
+                       bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
+               }
+               break;
+       default:
+               pr_err("Workarounds unknown for device 0x%04X\n",
+                       bus->chipinfo.id);
+       }
+}
+
+void bcma_pmu_init(struct bcma_drv_cc *cc)
+{
+       u32 pmucap;
+
+       pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
+       cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
+
+       pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
+                pmucap);
+
+       if (cc->pmu.rev == 1)
+               bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
+                             ~BCMA_CC_PMU_CTL_NOILPONW);
+       else
+               bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
+                            BCMA_CC_PMU_CTL_NOILPONW);
+
+       if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
+               pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
+
+       bcma_pmu_pll_init(cc);
+       bcma_pmu_resources_init(cc);
+       bcma_pmu_swreg_init(cc);
+       bcma_pmu_workarounds(cc);
+}