forked from luck/tmp_suning_uos_patched
8369ae33b7
Broadcom has released cards based on a new AMBA-based bus type. From a programming point of view, this new bus type differs from AMBA and does not use AMBA common registers. It also differs enough from SSB. We decided that a new bus driver is needed to keep the code clean. In its current form, the driver detects devices present on the bus and registers them in the system. It allows registering BCMA drivers for specified bus devices and provides them basic operations. The bus driver itself includes two important bus managing drivers: ChipCommon core driver and PCI(c) core driver. They are early used to allow correct initialization. Currently code is limited to supporting buses on PCI(e) devices, however the driver is designed to be used also on other hosts. The host abstraction layer is implemented and already used for PCI(e). Support for PCI(e) hosts is working and seems to be stable (access to 80211 core was tested successfully on a few devices). We can still optimize it by using some fixed windows, but this can be done later without affecting any external code. Windows are just ranges in MMIO used for accessing cores on the bus. Cc: Greg KH <greg@kroah.com> Cc: Michael Büsch <mb@bu3sch.de> Cc: Larry Finger <Larry.Finger@lwfinger.net> Cc: George Kashperko <george@znau.edu.ua> Cc: Arend van Spriel <arend@broadcom.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Russell King <rmk@arm.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Botting <andy@andybotting.com> Cc: linuxdriverproject <devel@linuxdriverproject.org> Cc: linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
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* Broadcom specific AMBA
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* ChipCommon Power Management Unit driver
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*
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* Copyright 2009, Michael Buesch <mb@bu3sch.de>
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* Copyright 2007, Broadcom Corporation
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include "bcma_private.h"
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#include <linux/bcma/bcma.h>
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static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
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u32 offset, u32 mask, u32 set)
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{
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u32 value;
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bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
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bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
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bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
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value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
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value &= mask;
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value |= set;
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bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
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bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
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}
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static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
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{
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struct bcma_bus *bus = cc->core->bus;
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switch (bus->chipinfo.id) {
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case 0x4313:
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case 0x4331:
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case 43224:
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case 43225:
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break;
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default:
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pr_err("PLL init unknown for device 0x%04X\n",
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bus->chipinfo.id);
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}
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}
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static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
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{
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struct bcma_bus *bus = cc->core->bus;
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u32 min_msk = 0, max_msk = 0;
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switch (bus->chipinfo.id) {
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case 0x4313:
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min_msk = 0x200D;
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max_msk = 0xFFFF;
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break;
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case 43224:
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break;
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default:
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pr_err("PMU resource config unknown for device 0x%04X\n",
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bus->chipinfo.id);
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}
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/* Set the resource masks. */
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if (min_msk)
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bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
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if (max_msk)
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bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
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}
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void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
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{
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struct bcma_bus *bus = cc->core->bus;
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switch (bus->chipinfo.id) {
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case 0x4313:
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case 0x4331:
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case 43224:
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break;
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default:
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pr_err("PMU switch/regulators init unknown for device "
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"0x%04X\n", bus->chipinfo.id);
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}
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}
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void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
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{
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struct bcma_bus *bus = cc->core->bus;
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switch (bus->chipinfo.id) {
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case 0x4313:
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bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
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break;
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case 0x4331:
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pr_err("Enabling Ext PA lines not implemented\n");
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break;
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case 43224:
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if (bus->chipinfo.rev == 0) {
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pr_err("Workarounds for 43224 rev 0 not fully "
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"implemented\n");
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bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
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} else {
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bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
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}
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break;
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default:
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pr_err("Workarounds unknown for device 0x%04X\n",
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bus->chipinfo.id);
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}
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}
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void bcma_pmu_init(struct bcma_drv_cc *cc)
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{
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u32 pmucap;
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pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
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cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
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pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
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pmucap);
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if (cc->pmu.rev == 1)
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bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
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~BCMA_CC_PMU_CTL_NOILPONW);
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else
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bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
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BCMA_CC_PMU_CTL_NOILPONW);
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if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
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pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
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bcma_pmu_pll_init(cc);
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bcma_pmu_resources_init(cc);
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bcma_pmu_swreg_init(cc);
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bcma_pmu_workarounds(cc);
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}
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