Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 416 insertions, 0 deletions

diff --git a/kernel/sound/pci/cs5535audio/cs5535audio.c b/kernel/sound/pci/cs5535audio/cs5535audio.c
new file mode 100644
index 000000000..963b91255
--- /dev/null
+++ b/kernel/sound/pci/cs5535audio/cs5535audio.c
@@ -0,0 +1,416 @@
+/*
+ * Driver for audio on multifunction CS5535/6 companion device
+ * Copyright (C) Jaya Kumar
+ *
+ * Based on Jaroslav Kysela and Takashi Iwai's examples.
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/rawmidi.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/asoundef.h>
+#include "cs5535audio.h"
+
+#define DRIVER_NAME "cs5535audio"
+
+static char *ac97_quirk;
+module_param(ac97_quirk, charp, 0444);
+MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
+
+static const struct ac97_quirk ac97_quirks[] = {
+#if 0 /* Not yet confirmed if all 5536 boards are HP only */
+	{
+		.subvendor = PCI_VENDOR_ID_AMD, 
+		.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, 
+		.name = "AMD RDK",     
+		.type = AC97_TUNE_HP_ONLY
+	},
+#endif
+	{}
+};
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
+
+static const struct pci_device_id snd_cs5535audio_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
+	{}
+};
+
+MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
+
+static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
+{
+	unsigned int tmp;
+	do {
+		tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
+		if (!(tmp & CMD_NEW))
+			break;
+		udelay(1);
+	} while (--timeout);
+	if (!timeout)
+		dev_err(cs5535au->card->dev,
+			"Failure writing to cs5535 codec\n");
+}
+
+static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
+						 unsigned short reg)
+{
+	unsigned int regdata;
+	unsigned int timeout;
+	unsigned int val;
+
+	regdata = ((unsigned int) reg) << 24;
+	regdata |= ACC_CODEC_CNTL_RD_CMD;
+	regdata |= CMD_NEW;
+
+	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
+	wait_till_cmd_acked(cs5535au, 50);
+
+	timeout = 50;
+	do {
+		val = cs_readl(cs5535au, ACC_CODEC_STATUS);
+		if ((val & STS_NEW) && reg == (val >> 24))
+			break;
+		udelay(1);
+	} while (--timeout);
+	if (!timeout)
+		dev_err(cs5535au->card->dev,
+			"Failure reading codec reg 0x%x, Last value=0x%x\n",
+			reg, val);
+
+	return (unsigned short) val;
+}
+
+static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
+					unsigned short reg, unsigned short val)
+{
+	unsigned int regdata;
+
+	regdata = ((unsigned int) reg) << 24;
+	regdata |= val;
+	regdata &= CMD_MASK;
+	regdata |= CMD_NEW;
+	regdata &= ACC_CODEC_CNTL_WR_CMD;
+
+	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
+	wait_till_cmd_acked(cs5535au, 50);
+}
+
+static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
+					     unsigned short reg, unsigned short val)
+{
+	struct cs5535audio *cs5535au = ac97->private_data;
+	snd_cs5535audio_codec_write(cs5535au, reg, val);
+}
+
+static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
+						      unsigned short reg)
+{
+	struct cs5535audio *cs5535au = ac97->private_data;
+	return snd_cs5535audio_codec_read(cs5535au, reg);
+}
+
+static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
+{
+	struct snd_card *card = cs5535au->card;
+	struct snd_ac97_bus *pbus;
+	struct snd_ac97_template ac97;
+	int err;
+	static struct snd_ac97_bus_ops ops = {
+		.write = snd_cs5535audio_ac97_codec_write,
+		.read = snd_cs5535audio_ac97_codec_read,
+	};
+
+	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
+		return err;
+
+	memset(&ac97, 0, sizeof(ac97));
+	ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
+			| AC97_SCAP_POWER_SAVE;
+	ac97.private_data = cs5535au;
+	ac97.pci = cs5535au->pci;
+
+	/* set any OLPC-specific scaps */
+	olpc_prequirks(card, &ac97);
+
+	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
+		dev_err(card->dev, "mixer failed\n");
+		return err;
+	}
+
+	snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
+
+	err = olpc_quirks(card, cs5535au->ac97);
+	if (err < 0) {
+		dev_err(card->dev, "olpc quirks failed\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static void process_bm0_irq(struct cs5535audio *cs5535au)
+{
+	u8 bm_stat;
+	spin_lock(&cs5535au->reg_lock);
+	bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
+	spin_unlock(&cs5535au->reg_lock);
+	if (bm_stat & EOP) {
+		struct cs5535audio_dma *dma;
+		dma = cs5535au->playback_substream->runtime->private_data;
+		snd_pcm_period_elapsed(cs5535au->playback_substream);
+	} else {
+		dev_err(cs5535au->card->dev,
+			"unexpected bm0 irq src, bm_stat=%x\n",
+			bm_stat);
+	}
+}
+
+static void process_bm1_irq(struct cs5535audio *cs5535au)
+{
+	u8 bm_stat;
+	spin_lock(&cs5535au->reg_lock);
+	bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
+	spin_unlock(&cs5535au->reg_lock);
+	if (bm_stat & EOP) {
+		struct cs5535audio_dma *dma;
+		dma = cs5535au->capture_substream->runtime->private_data;
+		snd_pcm_period_elapsed(cs5535au->capture_substream);
+	}
+}
+
+static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
+{
+	u16 acc_irq_stat;
+	unsigned char count;
+	struct cs5535audio *cs5535au = dev_id;
+
+	if (cs5535au == NULL)
+		return IRQ_NONE;
+
+	acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
+
+	if (!acc_irq_stat)
+		return IRQ_NONE;
+	for (count = 0; count < 4; count++) {
+		if (acc_irq_stat & (1 << count)) {
+			switch (count) {
+			case IRQ_STS:
+				cs_readl(cs5535au, ACC_GPIO_STATUS);
+				break;
+			case WU_IRQ_STS:
+				cs_readl(cs5535au, ACC_GPIO_STATUS);
+				break;
+			case BM0_IRQ_STS:
+				process_bm0_irq(cs5535au);
+				break;
+			case BM1_IRQ_STS:
+				process_bm1_irq(cs5535au);
+				break;
+			default:
+				dev_err(cs5535au->card->dev,
+					"Unexpected irq src: 0x%x\n",
+					acc_irq_stat);
+				break;
+			}
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
+{
+	synchronize_irq(cs5535au->irq);
+	pci_set_power_state(cs5535au->pci, PCI_D3hot);
+
+	if (cs5535au->irq >= 0)
+		free_irq(cs5535au->irq, cs5535au);
+
+	pci_release_regions(cs5535au->pci);
+	pci_disable_device(cs5535au->pci);
+	kfree(cs5535au);
+	return 0;
+}
+
+static int snd_cs5535audio_dev_free(struct snd_device *device)
+{
+	struct cs5535audio *cs5535au = device->device_data;
+	return snd_cs5535audio_free(cs5535au);
+}
+
+static int snd_cs5535audio_create(struct snd_card *card,
+				  struct pci_dev *pci,
+				  struct cs5535audio **rcs5535au)
+{
+	struct cs5535audio *cs5535au;
+
+	int err;
+	static struct snd_device_ops ops = {
+		.dev_free =	snd_cs5535audio_dev_free,
+	};
+
+	*rcs5535au = NULL;
+	if ((err = pci_enable_device(pci)) < 0)
+		return err;
+
+	if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 ||
+	    pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) {
+		dev_warn(card->dev, "unable to get 32bit dma\n");
+		err = -ENXIO;
+		goto pcifail;
+	}
+
+	cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
+	if (cs5535au == NULL) {
+		err = -ENOMEM;
+		goto pcifail;
+	}
+
+	spin_lock_init(&cs5535au->reg_lock);
+	cs5535au->card = card;
+	cs5535au->pci = pci;
+	cs5535au->irq = -1;
+
+	if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
+		kfree(cs5535au);
+		goto pcifail;
+	}
+
+	cs5535au->port = pci_resource_start(pci, 0);
+
+	if (request_irq(pci->irq, snd_cs5535audio_interrupt,
+			IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
+		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
+		err = -EBUSY;
+		goto sndfail;
+	}
+
+	cs5535au->irq = pci->irq;
+	pci_set_master(pci);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+				  cs5535au, &ops)) < 0)
+		goto sndfail;
+
+	*rcs5535au = cs5535au;
+	return 0;
+
+sndfail: /* leave the device alive, just kill the snd */
+	snd_cs5535audio_free(cs5535au);
+	return err;
+
+pcifail:
+	pci_disable_device(pci);
+	return err;
+}
+
+static int snd_cs5535audio_probe(struct pci_dev *pci,
+				 const struct pci_device_id *pci_id)
+{
+	static int dev;
+	struct snd_card *card;
+	struct cs5535audio *cs5535au;
+	int err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+			   0, &card);
+	if (err < 0)
+		return err;
+
+	if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
+		goto probefail_out;
+
+	card->private_data = cs5535au;
+
+	if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
+		goto probefail_out;
+
+	if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
+		goto probefail_out;
+
+	strcpy(card->driver, DRIVER_NAME);
+
+	strcpy(card->shortname, "CS5535 Audio");
+	sprintf(card->longname, "%s %s at 0x%lx, irq %i",
+		card->shortname, card->driver,
+		cs5535au->port, cs5535au->irq);
+
+	if ((err = snd_card_register(card)) < 0)
+		goto probefail_out;
+
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+
+probefail_out:
+	snd_card_free(card);
+	return err;
+}
+
+static void snd_cs5535audio_remove(struct pci_dev *pci)
+{
+	olpc_quirks_cleanup();
+	snd_card_free(pci_get_drvdata(pci));
+}
+
+static struct pci_driver cs5535audio_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_cs5535audio_ids,
+	.probe = snd_cs5535audio_probe,
+	.remove = snd_cs5535audio_remove,
+#ifdef CONFIG_PM_SLEEP
+	.driver = {
+		.pm = &snd_cs5535audio_pm,
+	},
+#endif
+};
+
+module_pci_driver(cs5535audio_driver);
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("CS5535 Audio");
+MODULE_SUPPORTED_DEVICE("CS5535 Audio");