/* * Driver for the 1250-EV1 audio I/O module * * Copyright 2011 Wolfson Microelectronics plc * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include #include #include #include #include #include #include #include static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = { "WM1250 CLK_ENA", "WM1250 CLK_SEL0", "WM1250 CLK_SEL1", "WM1250 OSR", "WM1250 MASTER", }; struct wm1250_priv { struct gpio gpios[WM1250_EV1_NUM_GPIOS]; }; static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev); int ena; if (wm1250) ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio; else ena = -1; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: if (ena >= 0) gpio_set_value_cansleep(ena, 1); break; case SND_SOC_BIAS_OFF: if (ena >= 0) gpio_set_value_cansleep(ena, 0); break; } return 0; } static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = { SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_INPUT("WM1250 Input"), SND_SOC_DAPM_OUTPUT("WM1250 Output"), }; static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = { { "ADC", NULL, "WM1250 Input" }, { "WM1250 Output", NULL, "DAC" }, }; static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec); switch (params_rate(params)) { case 8000: gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 1); gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 1); break; case 16000: gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 0); gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 1); break; case 32000: gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 1); gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 0); break; case 64000: gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio, 0); gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio, 0); break; default: return -EINVAL; } return 0; } static const struct snd_soc_dai_ops wm1250_ev1_ops = { .hw_params = wm1250_ev1_hw_params, }; #define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000) static struct snd_soc_dai_driver wm1250_ev1_dai = { .name = "wm1250-ev1", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, .rates = WM1250_EV1_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE, }, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 2, .rates = WM1250_EV1_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE, }, .ops = &wm1250_ev1_ops, }; static const struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = { .component_driver = { .dapm_widgets = wm1250_ev1_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets), .dapm_routes = wm1250_ev1_dapm_routes, .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes), }, .set_bias_level = wm1250_ev1_set_bias_level, .idle_bias_off = true, }; static int wm1250_ev1_pdata(struct i2c_client *i2c) { struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev); struct wm1250_priv *wm1250; int i, ret; if (!pdata) return 0; wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL); if (!wm1250) { ret = -ENOMEM; goto err; } for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) { wm1250->gpios[i].gpio = pdata->gpios[i]; wm1250->gpios[i].label = wm1250_gpio_names[i]; wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW; } wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH; wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH; ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); if (ret != 0) { dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret); goto err; } dev_set_drvdata(&i2c->dev, wm1250); return ret; err: return ret; } static void wm1250_ev1_free(struct i2c_client *i2c) { struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev); if (wm1250) gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios)); } static int wm1250_ev1_probe(struct i2c_client *i2c, const struct i2c_device_id *i2c_id) { int id, board, rev, ret; dev_set_drvdata(&i2c->dev, NULL); board = i2c_smbus_read_byte_data(i2c, 0); if (board < 0) { dev_err(&i2c->dev, "Failed to read ID: %d\n", board); return board; } id = (board & 0xfe) >> 2; rev = board & 0x3; if (id != 1) { dev_err(&i2c->dev, "Unknown board ID %d\n", id); return -ENODEV; } dev_info(&i2c->dev, "revision %d\n", rev + 1); ret = wm1250_ev1_pdata(i2c); if (ret != 0) return ret; ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1, &wm1250_ev1_dai, 1); if (ret != 0) { dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); wm1250_ev1_free(i2c); return ret; } return 0; } static int wm1250_ev1_remove(struct i2c_client *i2c) { snd_soc_unregister_codec(&i2c->dev); wm1250_ev1_free(i2c); return 0; } static const struct i2c_device_id wm1250_ev1_i2c_id[] = { { "wm1250-ev1", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id); static struct i2c_driver wm1250_ev1_i2c_driver = { .driver = { .name = "wm1250-ev1", }, .probe = wm1250_ev1_probe, .remove = wm1250_ev1_remove, .id_table = wm1250_ev1_i2c_id, }; module_i2c_driver(wm1250_ev1_i2c_driver); MODULE_AUTHOR("Mark Brown "); MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver"); MODULE_LICENSE("GPL"); /builtin-kvm.c?h=nds-private-remove&id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b&id2=a0615a16f7d0ceb5804d295203c302d496d8ee91'>diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf/builtin-kvm.c')