|  | /* | 
|  | * Broadcom specific AMBA | 
|  | * ChipCommon Power Management Unit driver | 
|  | * | 
|  | * Copyright 2009, Michael Buesch <m@bues.ch> | 
|  | * Copyright 2007, Broadcom Corporation | 
|  | * | 
|  | * Licensed under the GNU/GPL. See COPYING for details. | 
|  | */ | 
|  |  | 
|  | #include "bcma_private.h" | 
|  | #include <linux/export.h> | 
|  | #include <linux/bcma/bcma.h> | 
|  |  | 
|  | static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset) | 
|  | { | 
|  | bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset); | 
|  | bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR); | 
|  | return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA); | 
|  | } | 
|  |  | 
|  | void bcma_chipco_pll_write(struct bcma_drv_cc *cc, u32 offset, u32 value) | 
|  | { | 
|  | bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset); | 
|  | bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR); | 
|  | bcma_cc_write32(cc, BCMA_CC_PLLCTL_DATA, value); | 
|  | } | 
|  | EXPORT_SYMBOL_GPL(bcma_chipco_pll_write); | 
|  |  | 
|  | void bcma_chipco_pll_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask, | 
|  | u32 set) | 
|  | { | 
|  | bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset); | 
|  | bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR); | 
|  | bcma_cc_maskset32(cc, BCMA_CC_PLLCTL_DATA, mask, set); | 
|  | } | 
|  | EXPORT_SYMBOL_GPL(bcma_chipco_pll_maskset); | 
|  |  | 
|  | void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc, | 
|  | u32 offset, u32 mask, u32 set) | 
|  | { | 
|  | bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset); | 
|  | bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR); | 
|  | bcma_cc_maskset32(cc, BCMA_CC_CHIPCTL_DATA, mask, set); | 
|  | } | 
|  | EXPORT_SYMBOL_GPL(bcma_chipco_chipctl_maskset); | 
|  |  | 
|  | void bcma_chipco_regctl_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask, | 
|  | u32 set) | 
|  | { | 
|  | bcma_cc_write32(cc, BCMA_CC_REGCTL_ADDR, offset); | 
|  | bcma_cc_read32(cc, BCMA_CC_REGCTL_ADDR); | 
|  | bcma_cc_maskset32(cc, BCMA_CC_REGCTL_DATA, mask, set); | 
|  | } | 
|  | EXPORT_SYMBOL_GPL(bcma_chipco_regctl_maskset); | 
|  |  | 
|  | 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: | 
|  | case 43225: | 
|  | 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: | 
|  | case 43225: | 
|  | break; | 
|  | default: | 
|  | pr_err("PMU switch/regulators init unknown for device " | 
|  | "0x%04X\n", bus->chipinfo.id); | 
|  | } | 
|  | } | 
|  |  | 
|  | /* Disable to allow reading SPROM. Don't know the adventages of enabling it. */ | 
|  | void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable) | 
|  | { | 
|  | struct bcma_bus *bus = cc->core->bus; | 
|  | u32 val; | 
|  |  | 
|  | val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL); | 
|  | if (enable) { | 
|  | val |= BCMA_CHIPCTL_4331_EXTPA_EN; | 
|  | if (bus->chipinfo.pkg == 9 || bus->chipinfo.pkg == 11) | 
|  | val |= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5; | 
|  | } else { | 
|  | val &= ~BCMA_CHIPCTL_4331_EXTPA_EN; | 
|  | val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5; | 
|  | } | 
|  | bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val); | 
|  | } | 
|  |  | 
|  | 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: | 
|  | /* BCM4331 workaround is SPROM-related, we put it in sprom.c */ | 
|  | 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, 0x00F000F0); | 
|  | } else { | 
|  | bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0); | 
|  | } | 
|  | break; | 
|  | case 43225: | 
|  | 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); | 
|  | } | 
|  |  | 
|  | u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc) | 
|  | { | 
|  | struct bcma_bus *bus = cc->core->bus; | 
|  |  | 
|  | switch (bus->chipinfo.id) { | 
|  | case 0x4716: | 
|  | case 0x4748: | 
|  | case 47162: | 
|  | case 0x4313: | 
|  | case 0x5357: | 
|  | case 0x4749: | 
|  | case 53572: | 
|  | /* always 20Mhz */ | 
|  | return 20000 * 1000; | 
|  | case 0x5356: | 
|  | case 0x5300: | 
|  | /* always 25Mhz */ | 
|  | return 25000 * 1000; | 
|  | default: | 
|  | pr_warn("No ALP clock specified for %04X device, " | 
|  | "pmu rev. %d, using default %d Hz\n", | 
|  | bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK); | 
|  | } | 
|  | return BCMA_CC_PMU_ALP_CLOCK; | 
|  | } | 
|  |  | 
|  | /* Find the output of the "m" pll divider given pll controls that start with | 
|  | * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc. | 
|  | */ | 
|  | static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m) | 
|  | { | 
|  | u32 tmp, div, ndiv, p1, p2, fc; | 
|  | struct bcma_bus *bus = cc->core->bus; | 
|  |  | 
|  | BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0)); | 
|  |  | 
|  | BUG_ON(!m || m > 4); | 
|  |  | 
|  | if (bus->chipinfo.id == 0x5357 || bus->chipinfo.id == 0x4749) { | 
|  | /* Detect failure in clock setting */ | 
|  | tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT); | 
|  | if (tmp & 0x40000) | 
|  | return 133 * 1000000; | 
|  | } | 
|  |  | 
|  | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF); | 
|  | p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT; | 
|  | p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT; | 
|  |  | 
|  | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF); | 
|  | div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) & | 
|  | BCMA_CC_PPL_MDIV_MASK; | 
|  |  | 
|  | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF); | 
|  | ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT; | 
|  |  | 
|  | /* Do calculation in Mhz */ | 
|  | fc = bcma_pmu_alp_clock(cc) / 1000000; | 
|  | fc = (p1 * ndiv * fc) / p2; | 
|  |  | 
|  | /* Return clock in Hertz */ | 
|  | return (fc / div) * 1000000; | 
|  | } | 
|  |  | 
|  | /* query bus clock frequency for PMU-enabled chipcommon */ | 
|  | u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc) | 
|  | { | 
|  | struct bcma_bus *bus = cc->core->bus; | 
|  |  | 
|  | switch (bus->chipinfo.id) { | 
|  | case 0x4716: | 
|  | case 0x4748: | 
|  | case 47162: | 
|  | return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0, | 
|  | BCMA_CC_PMU5_MAINPLL_SSB); | 
|  | case 0x5356: | 
|  | return bcma_pmu_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0, | 
|  | BCMA_CC_PMU5_MAINPLL_SSB); | 
|  | case 0x5357: | 
|  | case 0x4749: | 
|  | return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0, | 
|  | BCMA_CC_PMU5_MAINPLL_SSB); | 
|  | case 0x5300: | 
|  | return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0, | 
|  | BCMA_CC_PMU5_MAINPLL_SSB); | 
|  | case 53572: | 
|  | return 75000000; | 
|  | default: | 
|  | pr_warn("No backplane clock specified for %04X device, " | 
|  | "pmu rev. %d, using default %d Hz\n", | 
|  | bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK); | 
|  | } | 
|  | return BCMA_CC_PMU_HT_CLOCK; | 
|  | } | 
|  |  | 
|  | /* query cpu clock frequency for PMU-enabled chipcommon */ | 
|  | u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc) | 
|  | { | 
|  | struct bcma_bus *bus = cc->core->bus; | 
|  |  | 
|  | if (bus->chipinfo.id == 53572) | 
|  | return 300000000; | 
|  |  | 
|  | if (cc->pmu.rev >= 5) { | 
|  | u32 pll; | 
|  | switch (bus->chipinfo.id) { | 
|  | case 0x5356: | 
|  | pll = BCMA_CC_PMU5356_MAINPLL_PLL0; | 
|  | break; | 
|  | case 0x5357: | 
|  | case 0x4749: | 
|  | pll = BCMA_CC_PMU5357_MAINPLL_PLL0; | 
|  | break; | 
|  | default: | 
|  | pll = BCMA_CC_PMU4716_MAINPLL_PLL0; | 
|  | break; | 
|  | } | 
|  |  | 
|  | /* TODO: if (bus->chipinfo.id == 0x5300) | 
|  | return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */ | 
|  | return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU); | 
|  | } | 
|  |  | 
|  | return bcma_pmu_get_clockcontrol(cc); | 
|  | } |