/* * SiRF audio card driver * * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. * * Licensed under GPLv2 or later. */ #include #include #include #include #include #include #include #include struct sirf_audio_card { unsigned int gpio_hp_pa; unsigned int gpio_spk_pa; }; static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *ctrl, int event) { struct snd_soc_dapm_context *dapm = w->dapm; struct snd_soc_card *card = dapm->card; struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); int on = !SND_SOC_DAPM_EVENT_OFF(event); if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) gpio_set_value(sirf_audio_card->gpio_hp_pa, on); return 0; } static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *ctrl, int event) { struct snd_soc_dapm_context *dapm = w->dapm; struct snd_soc_card *card = dapm->card; struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); int on = !SND_SOC_DAPM_EVENT_OFF(event); if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) gpio_set_value(sirf_audio_card->gpio_spk_pa, on); return 0; } static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = { SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event), SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event), SND_SOC_DAPM_MIC("Ext Mic", NULL), }; static const struct snd_soc_dapm_route intercon[] = { {"Hp", NULL, "HPOUTL"}, {"Hp", NULL, "HPOUTR"}, {"Ext Spk", NULL, "SPKOUT"}, {"MICIN1", NULL, "Mic Bias"}, {"Mic Bias", NULL, "Ext Mic"}, }; /* Digital audio interface glue - connects codec <--> CPU */ static struct snd_soc_dai_link sirf_audio_dai_link[] = { { .name = "SiRF audio card", .stream_name = "SiRF audio HiFi", .codec_dai_name = "sirf-audio-codec", }, }; /* Audio machine driver */ static struct snd_soc_card snd_soc_sirf_audio_card = { .name = "SiRF audio card", .owner = THIS_MODULE, .dai_link = sirf_audio_dai_link, .num_links = ARRAY_SIZE(sirf_audio_dai_link), .dapm_widgets = sirf_audio_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets), .dapm_routes = intercon, .num_dapm_routes = ARRAY_SIZE(intercon), }; static int sirf_audio_probe(struct platform_device *pdev) { struct snd_soc_card *card = &snd_soc_sirf_audio_card; struct sirf_audio_card *sirf_audio_card; int ret; sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card), GFP_KERNEL); if (sirf_audio_card == NULL) return -ENOMEM; sirf_audio_dai_link[0].cpu_of_node = of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); sirf_audio_dai_link[0].platform_of_node = of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); sirf_audio_dai_link[0].codec_of_node = of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0); sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node, "spk-pa-gpios", 0); sirf_audio_card->gpio_hp_pa = of_get_named_gpio(pdev->dev.of_node, "hp-pa-gpios", 0); if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) { ret = devm_gpio_request_one(&pdev->dev, sirf_audio_card->gpio_spk_pa, GPIOF_OUT_INIT_LOW, "SPA_PA_SD"); if (ret) { dev_err(&pdev->dev, "Failed to request GPIO_%d for reset: %d\n", sirf_audio_card->gpio_spk_pa, ret); return ret; } } if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) { ret = devm_gpio_request_one(&pdev->dev, sirf_audio_card->gpio_hp_pa, GPIOF_OUT_INIT_LOW, "HP_PA_SD"); if (ret) { dev_err(&pdev->dev, "Failed to request GPIO_%d for reset: %d\n", sirf_audio_card->gpio_hp_pa, ret); return ret; } } card->dev = &pdev->dev; snd_soc_card_set_drvdata(card, sirf_audio_card); ret = devm_snd_soc_register_card(&pdev->dev, card); if (ret) dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret); return ret; } static const struct of_device_id sirf_audio_of_match[] = { {.compatible = "sirf,sirf-audio-card", }, { }, }; MODULE_DEVICE_TABLE(of, sirf_audio_of_match); static struct platform_driver sirf_audio_driver = { .driver = { .name = "sirf-audio-card", .pm = &snd_soc_pm_ops, .of_match_table = sirf_audio_of_match, }, .probe = sirf_audio_probe, }; module_platform_driver(sirf_audio_driver); MODULE_AUTHOR("RongJun Ying "); MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver"); MODULE_LICENSE("GPL v2");
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /drivers/usb/dwc2/core.h
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/dwc2/core.h')