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, 1357 insertions, 0 deletions

diff --git a/kernel/sound/isa/sscape.c b/kernel/sound/isa/sscape.c
new file mode 100644
index 000000000..7b248cdf0
--- /dev/null
+++ b/kernel/sound/isa/sscape.c
@@ -0,0 +1,1357 @@
+/*
+ *   Low-level ALSA driver for the ENSONIQ SoundScape
+ *   Copyright (c) by Chris Rankin
+ *
+ *   This driver was written in part using information obtained from
+ *   the OSS/Free SoundScape driver, written by Hannu Savolainen.
+ *
+ *
+ *   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/init.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/isa.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/pnp.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <asm/dma.h>
+#include <sound/core.h>
+#include <sound/wss.h>
+#include <sound/mpu401.h>
+#include <sound/initval.h>
+
+
+MODULE_AUTHOR("Chris Rankin");
+MODULE_DESCRIPTION("ENSONIQ SoundScape driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("sndscape.co0");
+MODULE_FIRMWARE("sndscape.co1");
+MODULE_FIRMWARE("sndscape.co2");
+MODULE_FIRMWARE("sndscape.co3");
+MODULE_FIRMWARE("sndscape.co4");
+MODULE_FIRMWARE("scope.cod");
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
+static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
+static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
+static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
+static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
+static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
+static bool joystick[SNDRV_CARDS];
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
+
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "Description for SoundScape card");
+
+module_param_array(port, long, NULL, 0444);
+MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
+
+module_param_array(wss_port, long, NULL, 0444);
+MODULE_PARM_DESC(wss_port, "WSS Port # for SoundScape driver.");
+
+module_param_array(irq, int, NULL, 0444);
+MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
+
+module_param_array(mpu_irq, int, NULL, 0444);
+MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
+
+module_param_array(dma, int, NULL, 0444);
+MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
+
+module_param_array(dma2, int, NULL, 0444);
+MODULE_PARM_DESC(dma2, "DMA2 # for SoundScape driver.");
+
+module_param_array(joystick, bool, NULL, 0444);
+MODULE_PARM_DESC(joystick, "Enable gameport.");
+
+#ifdef CONFIG_PNP
+static int isa_registered;
+static int pnp_registered;
+
+static struct pnp_card_device_id sscape_pnpids[] = {
+	{ .id = "ENS3081", .devs = { { "ENS0000" } } }, /* Soundscape PnP */
+	{ .id = "ENS4081", .devs = { { "ENS1011" } } },	/* VIVO90 */
+	{ .id = "" }	/* end */
+};
+
+MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
+#endif
+
+
+#define HOST_CTRL_IO(i)  ((i) + 2)
+#define HOST_DATA_IO(i)  ((i) + 3)
+#define ODIE_ADDR_IO(i)  ((i) + 4)
+#define ODIE_DATA_IO(i)  ((i) + 5)
+#define CODEC_IO(i)      ((i) + 8)
+
+#define IC_ODIE  1
+#define IC_OPUS  2
+
+#define RX_READY 0x01
+#define TX_READY 0x02
+
+#define CMD_ACK			0x80
+#define CMD_SET_MIDI_VOL	0x84
+#define CMD_GET_MIDI_VOL	0x85
+#define CMD_XXX_MIDI_VOL	0x86
+#define CMD_SET_EXTMIDI		0x8a
+#define CMD_GET_EXTMIDI		0x8b
+#define CMD_SET_MT32		0x8c
+#define CMD_GET_MT32		0x8d
+
+enum GA_REG {
+	GA_INTSTAT_REG = 0,
+	GA_INTENA_REG,
+	GA_DMAA_REG,
+	GA_DMAB_REG,
+	GA_INTCFG_REG,
+	GA_DMACFG_REG,
+	GA_CDCFG_REG,
+	GA_SMCFGA_REG,
+	GA_SMCFGB_REG,
+	GA_HMCTL_REG
+};
+
+#define DMA_8BIT  0x80
+
+
+enum card_type {
+	MEDIA_FX,	/* Sequoia S-1000 */
+	SSCAPE,		/* Sequoia S-2000 */
+	SSCAPE_PNP,
+	SSCAPE_VIVO,
+};
+
+struct soundscape {
+	spinlock_t lock;
+	unsigned io_base;
+	int ic_type;
+	enum card_type type;
+	struct resource *io_res;
+	struct resource *wss_res;
+	struct snd_wss *chip;
+
+	unsigned char midi_vol;
+};
+
+#define INVALID_IRQ  ((unsigned)-1)
+
+
+static inline struct soundscape *get_card_soundscape(struct snd_card *c)
+{
+	return (struct soundscape *) (c->private_data);
+}
+
+/*
+ * Allocates some kernel memory that we can use for DMA.
+ * I think this means that the memory has to map to
+ * contiguous pages of physical memory.
+ */
+static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf,
+					 unsigned long size)
+{
+	if (buf) {
+		if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
+						 snd_dma_isa_data(),
+						 size, buf) < 0) {
+			snd_printk(KERN_ERR "sscape: Failed to allocate "
+					    "%lu bytes for DMA\n",
+					    size);
+			return NULL;
+		}
+	}
+
+	return buf;
+}
+
+/*
+ * Release the DMA-able kernel memory ...
+ */
+static void free_dmabuf(struct snd_dma_buffer *buf)
+{
+	if (buf && buf->area)
+		snd_dma_free_pages(buf);
+}
+
+/*
+ * This function writes to the SoundScape's control registers,
+ * but doesn't do any locking. It's up to the caller to do that.
+ * This is why this function is "unsafe" ...
+ */
+static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg,
+				       unsigned char val)
+{
+	outb(reg, ODIE_ADDR_IO(io_base));
+	outb(val, ODIE_DATA_IO(io_base));
+}
+
+/*
+ * Write to the SoundScape's control registers, and do the
+ * necessary locking ...
+ */
+static void sscape_write(struct soundscape *s, enum GA_REG reg,
+			 unsigned char val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	sscape_write_unsafe(s->io_base, reg, val);
+	spin_unlock_irqrestore(&s->lock, flags);
+}
+
+/*
+ * Read from the SoundScape's control registers, but leave any
+ * locking to the caller. This is why the function is "unsafe" ...
+ */
+static inline unsigned char sscape_read_unsafe(unsigned io_base,
+					       enum GA_REG reg)
+{
+	outb(reg, ODIE_ADDR_IO(io_base));
+	return inb(ODIE_DATA_IO(io_base));
+}
+
+/*
+ * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
+ */
+static inline void set_host_mode_unsafe(unsigned io_base)
+{
+	outb(0x0, HOST_CTRL_IO(io_base));
+}
+
+/*
+ * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
+ */
+static inline void set_midi_mode_unsafe(unsigned io_base)
+{
+	outb(0x3, HOST_CTRL_IO(io_base));
+}
+
+/*
+ * Read the SoundScape's host-mode control register, but leave
+ * any locking issues to the caller ...
+ */
+static inline int host_read_unsafe(unsigned io_base)
+{
+	int data = -1;
+	if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0)
+		data = inb(HOST_DATA_IO(io_base));
+
+	return data;
+}
+
+/*
+ * Read the SoundScape's host-mode control register, performing
+ * a limited amount of busy-waiting if the register isn't ready.
+ * Also leaves all locking-issues to the caller ...
+ */
+static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
+{
+	int data;
+
+	while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
+		udelay(100);
+		--timeout;
+	} /* while */
+
+	return data;
+}
+
+/*
+ * Write to the SoundScape's host-mode control registers, but
+ * leave any locking issues to the caller ...
+ */
+static inline int host_write_unsafe(unsigned io_base, unsigned char data)
+{
+	if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
+		outb(data, HOST_DATA_IO(io_base));
+		return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Write to the SoundScape's host-mode control registers, performing
+ * a limited amount of busy-waiting if the register isn't ready.
+ * Also leaves all locking-issues to the caller ...
+ */
+static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
+				  unsigned timeout)
+{
+	int err;
+
+	while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
+		udelay(100);
+		--timeout;
+	} /* while */
+
+	return err;
+}
+
+
+/*
+ * Check that the MIDI subsystem is operational. If it isn't,
+ * then we will hang the computer if we try to use it ...
+ *
+ * NOTE: This check is based upon observation, not documentation.
+ */
+static inline int verify_mpu401(const struct snd_mpu401 *mpu)
+{
+	return ((inb(MPU401C(mpu)) & 0xc0) == 0x80);
+}
+
+/*
+ * This is apparently the standard way to initailise an MPU-401
+ */
+static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
+{
+	outb(0, MPU401D(mpu));
+}
+
+/*
+ * Tell the SoundScape to activate the AD1845 chip (I think).
+ * The AD1845 detection fails if we *don't* do this, so I
+ * think that this is a good idea ...
+ */
+static void activate_ad1845_unsafe(unsigned io_base)
+{
+	unsigned char val = sscape_read_unsafe(io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(io_base, GA_HMCTL_REG, (val & 0xcf) | 0x10);
+	sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
+}
+
+/*
+ * Do the necessary ALSA-level cleanup to deallocate our driver ...
+ */
+static void soundscape_free(struct snd_card *c)
+{
+	struct soundscape *sscape = get_card_soundscape(c);
+	release_and_free_resource(sscape->io_res);
+	release_and_free_resource(sscape->wss_res);
+	free_dma(sscape->chip->dma1);
+}
+
+/*
+ * Tell the SoundScape to begin a DMA tranfer using the given channel.
+ * All locking issues are left to the caller.
+ */
+static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
+{
+	sscape_write_unsafe(io_base, reg,
+			    sscape_read_unsafe(io_base, reg) | 0x01);
+	sscape_write_unsafe(io_base, reg,
+			    sscape_read_unsafe(io_base, reg) & 0xfe);
+}
+
+/*
+ * Wait for a DMA transfer to complete. This is a "limited busy-wait",
+ * and all locking issues are left to the caller.
+ */
+static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg,
+				  unsigned timeout)
+{
+	while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
+		udelay(100);
+		--timeout;
+	} /* while */
+
+	return sscape_read_unsafe(io_base, reg) & 0x01;
+}
+
+/*
+ * Wait for the On-Board Processor to return its start-up
+ * acknowledgement sequence. This wait is too long for
+ * us to perform "busy-waiting", and so we must sleep.
+ * This in turn means that we must not be holding any
+ * spinlocks when we call this function.
+ */
+static int obp_startup_ack(struct soundscape *s, unsigned timeout)
+{
+	unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
+
+	do {
+		unsigned long flags;
+		int x;
+
+		spin_lock_irqsave(&s->lock, flags);
+		x = host_read_unsafe(s->io_base);
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (x == 0xfe || x == 0xff)
+			return 1;
+
+		msleep(10);
+	} while (time_before(jiffies, end_time));
+
+	return 0;
+}
+
+/*
+ * Wait for the host to return its start-up acknowledgement
+ * sequence. This wait is too long for us to perform
+ * "busy-waiting", and so we must sleep. This in turn means
+ * that we must not be holding any spinlocks when we call
+ * this function.
+ */
+static int host_startup_ack(struct soundscape *s, unsigned timeout)
+{
+	unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
+
+	do {
+		unsigned long flags;
+		int x;
+
+		spin_lock_irqsave(&s->lock, flags);
+		x = host_read_unsafe(s->io_base);
+		spin_unlock_irqrestore(&s->lock, flags);
+		if (x == 0xfe)
+			return 1;
+
+		msleep(10);
+	} while (time_before(jiffies, end_time));
+
+	return 0;
+}
+
+/*
+ * Upload a byte-stream into the SoundScape using DMA channel A.
+ */
+static int upload_dma_data(struct soundscape *s, const unsigned char *data,
+			   size_t size)
+{
+	unsigned long flags;
+	struct snd_dma_buffer dma;
+	int ret;
+	unsigned char val;
+
+	if (!get_dmabuf(&dma, PAGE_ALIGN(32 * 1024)))
+		return -ENOMEM;
+
+	spin_lock_irqsave(&s->lock, flags);
+
+	/*
+	 * Reset the board ...
+	 */
+	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val & 0x3f);
+
+	/*
+	 * Enable the DMA channels and configure them ...
+	 */
+	val = (s->chip->dma1 << 4) | DMA_8BIT;
+	sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
+	sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
+
+	/*
+	 * Take the board out of reset ...
+	 */
+	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x80);
+
+	/*
+	 * Upload the firmware to the SoundScape
+	 * board through the DMA channel ...
+	 */
+	while (size != 0) {
+		unsigned long len;
+
+		len = min(size, dma.bytes);
+		memcpy(dma.area, data, len);
+		data += len;
+		size -= len;
+
+		snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
+		sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
+		if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
+			/*
+			 * Don't forget to release this spinlock we're holding
+			 */
+			spin_unlock_irqrestore(&s->lock, flags);
+
+			snd_printk(KERN_ERR
+					"sscape: DMA upload has timed out\n");
+			ret = -EAGAIN;
+			goto _release_dma;
+		}
+	} /* while */
+
+	set_host_mode_unsafe(s->io_base);
+	outb(0x0, s->io_base);
+
+	/*
+	 * Boot the board ... (I think)
+	 */
+	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x40);
+	spin_unlock_irqrestore(&s->lock, flags);
+
+	/*
+	 * If all has gone well, then the board should acknowledge
+	 * the new upload and tell us that it has rebooted OK. We
+	 * give it 5 seconds (max) ...
+	 */
+	ret = 0;
+	if (!obp_startup_ack(s, 5000)) {
+		snd_printk(KERN_ERR "sscape: No response "
+				    "from on-board processor after upload\n");
+		ret = -EAGAIN;
+	} else if (!host_startup_ack(s, 5000)) {
+		snd_printk(KERN_ERR
+				"sscape: SoundScape failed to initialise\n");
+		ret = -EAGAIN;
+	}
+
+_release_dma:
+	/*
+	 * NOTE!!! We are NOT holding any spinlocks at this point !!!
+	 */
+	sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
+	free_dmabuf(&dma);
+
+	return ret;
+}
+
+/*
+ * Upload the bootblock(?) into the SoundScape. The only
+ * purpose of this block of code seems to be to tell
+ * us which version of the microcode we should be using.
+ */
+static int sscape_upload_bootblock(struct snd_card *card)
+{
+	struct soundscape *sscape = get_card_soundscape(card);
+	unsigned long flags;
+	const struct firmware *init_fw = NULL;
+	int data = 0;
+	int ret;
+
+	ret = request_firmware(&init_fw, "scope.cod", card->dev);
+	if (ret < 0) {
+		snd_printk(KERN_ERR "sscape: Error loading scope.cod");
+		return ret;
+	}
+	ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
+
+	release_firmware(init_fw);
+
+	spin_lock_irqsave(&sscape->lock, flags);
+	if (ret == 0)
+		data = host_read_ctrl_unsafe(sscape->io_base, 100);
+
+	if (data & 0x10)
+		sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2f);
+
+	spin_unlock_irqrestore(&sscape->lock, flags);
+
+	data &= 0xf;
+	if (ret == 0 && data > 7) {
+		snd_printk(KERN_ERR
+				"sscape: timeout reading firmware version\n");
+		ret = -EAGAIN;
+	}
+
+	return (ret == 0) ? data : ret;
+}
+
+/*
+ * Upload the microcode into the SoundScape.
+ */
+static int sscape_upload_microcode(struct snd_card *card, int version)
+{
+	struct soundscape *sscape = get_card_soundscape(card);
+	const struct firmware *init_fw = NULL;
+	char name[14];
+	int err;
+
+	snprintf(name, sizeof(name), "sndscape.co%d", version);
+
+	err = request_firmware(&init_fw, name, card->dev);
+	if (err < 0) {
+		snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
+				version);
+		return err;
+	}
+	err = upload_dma_data(sscape, init_fw->data, init_fw->size);
+	if (err == 0)
+		snd_printk(KERN_INFO "sscape: MIDI firmware loaded %d KBs\n",
+				init_fw->size >> 10);
+
+	release_firmware(init_fw);
+
+	return err;
+}
+
+/*
+ * Mixer control for the SoundScape's MIDI device.
+ */
+static int sscape_midi_info(struct snd_kcontrol *ctl,
+			    struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 127;
+	return 0;
+}
+
+static int sscape_midi_get(struct snd_kcontrol *kctl,
+			   struct snd_ctl_elem_value *uctl)
+{
+	struct snd_wss *chip = snd_kcontrol_chip(kctl);
+	struct snd_card *card = chip->card;
+	register struct soundscape *s = get_card_soundscape(card);
+	unsigned long flags;
+
+	spin_lock_irqsave(&s->lock, flags);
+	uctl->value.integer.value[0] = s->midi_vol;
+	spin_unlock_irqrestore(&s->lock, flags);
+	return 0;
+}
+
+static int sscape_midi_put(struct snd_kcontrol *kctl,
+			   struct snd_ctl_elem_value *uctl)
+{
+	struct snd_wss *chip = snd_kcontrol_chip(kctl);
+	struct snd_card *card = chip->card;
+	struct soundscape *s = get_card_soundscape(card);
+	unsigned long flags;
+	int change;
+	unsigned char new_val;
+
+	spin_lock_irqsave(&s->lock, flags);
+
+	new_val = uctl->value.integer.value[0] & 127;
+	/*
+	 * We need to put the board into HOST mode before we
+	 * can send any volume-changing HOST commands ...
+	 */
+	set_host_mode_unsafe(s->io_base);
+
+	/*
+	 * To successfully change the MIDI volume setting, you seem to
+	 * have to write a volume command, write the new volume value,
+	 * and then perform another volume-related command. Perhaps the
+	 * first command is an "open" and the second command is a "close"?
+	 */
+	if (s->midi_vol == new_val) {
+		change = 0;
+		goto __skip_change;
+	}
+	change = host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
+		 && host_write_ctrl_unsafe(s->io_base, new_val, 100)
+		 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)
+		 && host_write_ctrl_unsafe(s->io_base, new_val, 100);
+	s->midi_vol = new_val;
+__skip_change:
+
+	/*
+	 * Take the board out of HOST mode and back into MIDI mode ...
+	 */
+	set_midi_mode_unsafe(s->io_base);
+
+	spin_unlock_irqrestore(&s->lock, flags);
+	return change;
+}
+
+static struct snd_kcontrol_new midi_mixer_ctl = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "MIDI",
+	.info = sscape_midi_info,
+	.get = sscape_midi_get,
+	.put = sscape_midi_put
+};
+
+/*
+ * The SoundScape can use two IRQs from a possible set of four.
+ * These IRQs are encoded as bit patterns so that they can be
+ * written to the control registers.
+ */
+static unsigned get_irq_config(int sscape_type, int irq)
+{
+	static const int valid_irq[] = { 9, 5, 7, 10 };
+	static const int old_irq[] = { 9, 7, 5, 15 };
+	unsigned cfg;
+
+	if (sscape_type == MEDIA_FX) {
+		for (cfg = 0; cfg < ARRAY_SIZE(old_irq); ++cfg)
+			if (irq == old_irq[cfg])
+				return cfg;
+	} else {
+		for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg)
+			if (irq == valid_irq[cfg])
+				return cfg;
+	}
+
+	return INVALID_IRQ;
+}
+
+/*
+ * Perform certain arcane port-checks to see whether there
+ * is a SoundScape board lurking behind the given ports.
+ */
+static int detect_sscape(struct soundscape *s, long wss_io)
+{
+	unsigned long flags;
+	unsigned d;
+	int retval = 0;
+
+	spin_lock_irqsave(&s->lock, flags);
+
+	/*
+	 * The following code is lifted from the original OSS driver,
+	 * and as I don't have a datasheet I cannot really comment
+	 * on what it is doing...
+	 */
+	if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
+		goto _done;
+
+	d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
+	if ((d & 0x80) != 0)
+		goto _done;
+
+	if (d == 0)
+		s->ic_type = IC_ODIE;
+	else if ((d & 0x60) != 0)
+		s->ic_type = IC_OPUS;
+	else
+		goto _done;
+
+	outb(0xfa, ODIE_ADDR_IO(s->io_base));
+	if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
+		goto _done;
+
+	outb(0xfe, ODIE_ADDR_IO(s->io_base));
+	if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
+		goto _done;
+
+	outb(0xfe, ODIE_ADDR_IO(s->io_base));
+	d = inb(ODIE_DATA_IO(s->io_base));
+	if (s->type != SSCAPE_VIVO && (d & 0x9f) != 0x0e)
+		goto _done;
+
+	if (s->ic_type == IC_OPUS)
+		activate_ad1845_unsafe(s->io_base);
+
+	if (s->type == SSCAPE_VIVO)
+		wss_io += 4;
+
+	d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
+
+	/* wait for WSS codec */
+	for (d = 0; d < 500; d++) {
+		if ((inb(wss_io) & 0x80) == 0)
+			break;
+		spin_unlock_irqrestore(&s->lock, flags);
+		msleep(1);
+		spin_lock_irqsave(&s->lock, flags);
+	}
+
+	if ((inb(wss_io) & 0x80) != 0)
+		goto _done;
+
+	if (inb(wss_io + 2) == 0xff)
+		goto _done;
+
+	d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f;
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d);
+
+	if ((inb(wss_io) & 0x80) != 0)
+		s->type = MEDIA_FX;
+
+	d = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
+	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
+	/* wait for WSS codec */
+	for (d = 0; d < 500; d++) {
+		if ((inb(wss_io) & 0x80) == 0)
+			break;
+		spin_unlock_irqrestore(&s->lock, flags);
+		msleep(1);
+		spin_lock_irqsave(&s->lock, flags);
+	}
+
+	/*
+	 * SoundScape successfully detected!
+	 */
+	retval = 1;
+
+_done:
+	spin_unlock_irqrestore(&s->lock, flags);
+	return retval;
+}
+
+/*
+ * ALSA callback function, called when attempting to open the MIDI device.
+ * Check that the MIDI firmware has been loaded, because we don't want
+ * to crash the machine. Also check that someone isn't using the hardware
+ * IOCTL device.
+ */
+static int mpu401_open(struct snd_mpu401 *mpu)
+{
+	if (!verify_mpu401(mpu)) {
+		snd_printk(KERN_ERR "sscape: MIDI disabled, "
+				    "please load firmware\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/*
+ * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
+ */
+static int create_mpu401(struct snd_card *card, int devnum,
+			 unsigned long port, int irq)
+{
+	struct soundscape *sscape = get_card_soundscape(card);
+	struct snd_rawmidi *rawmidi;
+	int err;
+
+	err = snd_mpu401_uart_new(card, devnum, MPU401_HW_MPU401, port,
+				  MPU401_INFO_INTEGRATED, irq, &rawmidi);
+	if (err == 0) {
+		struct snd_mpu401 *mpu = rawmidi->private_data;
+		mpu->open_input = mpu401_open;
+		mpu->open_output = mpu401_open;
+		mpu->private_data = sscape;
+
+		initialise_mpu401(mpu);
+	}
+
+	return err;
+}
+
+
+/*
+ * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
+ * is very much like a CS4231, with a few extra bits. We will
+ * try to support at least some of the extra bits by overriding
+ * some of the CS4231 callback.
+ */
+static int create_ad1845(struct snd_card *card, unsigned port,
+			 int irq, int dma1, int dma2)
+{
+	register struct soundscape *sscape = get_card_soundscape(card);
+	struct snd_wss *chip;
+	int err;
+	int codec_type = WSS_HW_DETECT;
+
+	switch (sscape->type) {
+	case MEDIA_FX:
+	case SSCAPE:
+		/*
+		 * There are some freak examples of early Soundscape cards
+		 * with CS4231 instead of AD1848/CS4248. Unfortunately, the
+		 * CS4231 works only in CS4248 compatibility mode on
+		 * these cards so force it.
+		 */
+		if (sscape->ic_type != IC_OPUS)
+			codec_type = WSS_HW_AD1848;
+		break;
+
+	case SSCAPE_VIVO:
+		port += 4;
+		break;
+	default:
+		break;
+	}
+
+	err = snd_wss_create(card, port, -1, irq, dma1, dma2,
+			     codec_type, WSS_HWSHARE_DMA1, &chip);
+	if (!err) {
+		unsigned long flags;
+
+		if (sscape->type != SSCAPE_VIVO) {
+			/*
+			 * The input clock frequency on the SoundScape must
+			 * be 14.31818 MHz, because we must set this register
+			 * to get the playback to sound correct ...
+			 */
+			snd_wss_mce_up(chip);
+			spin_lock_irqsave(&chip->reg_lock, flags);
+			snd_wss_out(chip, AD1845_CLOCK, 0x20);
+			spin_unlock_irqrestore(&chip->reg_lock, flags);
+			snd_wss_mce_down(chip);
+
+		}
+
+		err = snd_wss_pcm(chip, 0);
+		if (err < 0) {
+			snd_printk(KERN_ERR "sscape: No PCM device "
+					    "for AD1845 chip\n");
+			goto _error;
+		}
+
+		err = snd_wss_mixer(chip);
+		if (err < 0) {
+			snd_printk(KERN_ERR "sscape: No mixer device "
+					    "for AD1845 chip\n");
+			goto _error;
+		}
+		if (chip->hardware != WSS_HW_AD1848) {
+			err = snd_wss_timer(chip, 0);
+			if (err < 0) {
+				snd_printk(KERN_ERR "sscape: No timer device "
+						    "for AD1845 chip\n");
+				goto _error;
+			}
+		}
+
+		if (sscape->type != SSCAPE_VIVO) {
+			err = snd_ctl_add(card,
+					  snd_ctl_new1(&midi_mixer_ctl, chip));
+			if (err < 0) {
+				snd_printk(KERN_ERR "sscape: Could not create "
+						    "MIDI mixer control\n");
+				goto _error;
+			}
+		}
+
+		sscape->chip = chip;
+	}
+
+_error:
+	return err;
+}
+
+
+/*
+ * Create an ALSA soundcard entry for the SoundScape, using
+ * the given list of port, IRQ and DMA resources.
+ */
+static int create_sscape(int dev, struct snd_card *card)
+{
+	struct soundscape *sscape = get_card_soundscape(card);
+	unsigned dma_cfg;
+	unsigned irq_cfg;
+	unsigned mpu_irq_cfg;
+	struct resource *io_res;
+	struct resource *wss_res;
+	unsigned long flags;
+	int err;
+	int val;
+	const char *name;
+
+	/*
+	 * Grab IO ports that we will need to probe so that we
+	 * can detect and control this hardware ...
+	 */
+	io_res = request_region(port[dev], 8, "SoundScape");
+	if (!io_res) {
+		snd_printk(KERN_ERR
+			   "sscape: can't grab port 0x%lx\n", port[dev]);
+		return -EBUSY;
+	}
+	wss_res = NULL;
+	if (sscape->type == SSCAPE_VIVO) {
+		wss_res = request_region(wss_port[dev], 4, "SoundScape");
+		if (!wss_res) {
+			snd_printk(KERN_ERR "sscape: can't grab port 0x%lx\n",
+					    wss_port[dev]);
+			err = -EBUSY;
+			goto _release_region;
+		}
+	}
+
+	/*
+	 * Grab one DMA channel ...
+	 */
+	err = request_dma(dma[dev], "SoundScape");
+	if (err < 0) {
+		snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
+		goto _release_region;
+	}
+
+	spin_lock_init(&sscape->lock);
+	sscape->io_res = io_res;
+	sscape->wss_res = wss_res;
+	sscape->io_base = port[dev];
+
+	if (!detect_sscape(sscape, wss_port[dev])) {
+		printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
+			sscape->io_base);
+		err = -ENODEV;
+		goto _release_dma;
+	}
+
+	switch (sscape->type) {
+	case MEDIA_FX:
+		name = "MediaFX/SoundFX";
+		break;
+	case SSCAPE:
+		name = "Soundscape";
+		break;
+	case SSCAPE_PNP:
+		name = "Soundscape PnP";
+		break;
+	case SSCAPE_VIVO:
+		name = "Soundscape VIVO";
+		break;
+	default:
+		name = "unknown Soundscape";
+		break;
+	}
+
+	printk(KERN_INFO "sscape: %s card detected at 0x%x, using IRQ %d, DMA %d\n",
+			 name, sscape->io_base, irq[dev], dma[dev]);
+
+	/*
+	 * Check that the user didn't pass us garbage data ...
+	 */
+	irq_cfg = get_irq_config(sscape->type, irq[dev]);
+	if (irq_cfg == INVALID_IRQ) {
+		snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
+		err = -ENXIO;
+		goto _release_dma;
+	}
+
+	mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
+	if (mpu_irq_cfg == INVALID_IRQ) {
+		snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
+		err = -ENXIO;
+		goto _release_dma;
+	}
+
+	/*
+	 * Tell the on-board devices where their resources are (I think -
+	 * I can't be sure without a datasheet ... So many magic values!)
+	 */
+	spin_lock_irqsave(&sscape->lock, flags);
+
+	sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
+	sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
+
+	/*
+	 * Enable and configure the DMA channels ...
+	 */
+	sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
+	dma_cfg = (sscape->ic_type == IC_OPUS ? 0x40 : 0x70);
+	sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
+	sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
+
+	mpu_irq_cfg |= mpu_irq_cfg << 2;
+	val = sscape_read_unsafe(sscape->io_base, GA_HMCTL_REG) & 0xF7;
+	if (joystick[dev])
+		val |= 8;
+	sscape_write_unsafe(sscape->io_base, GA_HMCTL_REG, val | 0x10);
+	sscape_write_unsafe(sscape->io_base, GA_INTCFG_REG, 0xf0 | mpu_irq_cfg);
+	sscape_write_unsafe(sscape->io_base,
+			    GA_CDCFG_REG, 0x09 | DMA_8BIT
+			    | (dma[dev] << 4) | (irq_cfg << 1));
+	/*
+	 * Enable the master IRQ ...
+	 */
+	sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x80);
+
+	spin_unlock_irqrestore(&sscape->lock, flags);
+
+	/*
+	 * We have now enabled the codec chip, and so we should
+	 * detect the AD1845 device ...
+	 */
+	err = create_ad1845(card, wss_port[dev], irq[dev],
+			    dma[dev], dma2[dev]);
+	if (err < 0) {
+		snd_printk(KERN_ERR
+				"sscape: No AD1845 device at 0x%lx, IRQ %d\n",
+				wss_port[dev], irq[dev]);
+		goto _release_dma;
+	}
+	strcpy(card->driver, "SoundScape");
+	strcpy(card->shortname, name);
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at 0x%lx, IRQ %d, DMA1 %d, DMA2 %d\n",
+		 name, sscape->chip->port, sscape->chip->irq,
+		 sscape->chip->dma1, sscape->chip->dma2);
+
+#define MIDI_DEVNUM  0
+	if (sscape->type != SSCAPE_VIVO) {
+		err = sscape_upload_bootblock(card);
+		if (err >= 0)
+			err = sscape_upload_microcode(card, err);
+
+		if (err == 0) {
+			err = create_mpu401(card, MIDI_DEVNUM, port[dev],
+					    mpu_irq[dev]);
+			if (err < 0) {
+				snd_printk(KERN_ERR "sscape: Failed to create "
+						"MPU-401 device at 0x%lx\n",
+						port[dev]);
+				goto _release_dma;
+			}
+
+			/*
+			 * Initialize mixer
+			 */
+			spin_lock_irqsave(&sscape->lock, flags);
+			sscape->midi_vol = 0;
+			host_write_ctrl_unsafe(sscape->io_base,
+						CMD_SET_MIDI_VOL, 100);
+			host_write_ctrl_unsafe(sscape->io_base,
+						sscape->midi_vol, 100);
+			host_write_ctrl_unsafe(sscape->io_base,
+						CMD_XXX_MIDI_VOL, 100);
+			host_write_ctrl_unsafe(sscape->io_base,
+						sscape->midi_vol, 100);
+			host_write_ctrl_unsafe(sscape->io_base,
+						CMD_SET_EXTMIDI, 100);
+			host_write_ctrl_unsafe(sscape->io_base,
+						0, 100);
+			host_write_ctrl_unsafe(sscape->io_base, CMD_ACK, 100);
+
+			set_midi_mode_unsafe(sscape->io_base);
+			spin_unlock_irqrestore(&sscape->lock, flags);
+		}
+	}
+
+	/*
+	 * Now that we have successfully created this sound card,
+	 * it is safe to store the pointer.
+	 * NOTE: we only register the sound card's "destructor"
+	 *       function now that our "constructor" has completed.
+	 */
+	card->private_free = soundscape_free;
+
+	return 0;
+
+_release_dma:
+	free_dma(dma[dev]);
+
+_release_region:
+	release_and_free_resource(wss_res);
+	release_and_free_resource(io_res);
+
+	return err;
+}
+
+
+static int snd_sscape_match(struct device *pdev, unsigned int i)
+{
+	/*
+	 * Make sure we were given ALL of the other parameters.
+	 */
+	if (port[i] == SNDRV_AUTO_PORT)
+		return 0;
+
+	if (irq[i] == SNDRV_AUTO_IRQ ||
+	    mpu_irq[i] == SNDRV_AUTO_IRQ ||
+	    dma[i] == SNDRV_AUTO_DMA) {
+		printk(KERN_INFO
+		       "sscape: insufficient parameters, "
+		       "need IO, IRQ, MPU-IRQ and DMA\n");
+		return 0;
+	}
+
+	return 1;
+}
+
+static int snd_sscape_probe(struct device *pdev, unsigned int dev)
+{
+	struct snd_card *card;
+	struct soundscape *sscape;
+	int ret;
+
+	ret = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
+			   sizeof(struct soundscape), &card);
+	if (ret < 0)
+		return ret;
+
+	sscape = get_card_soundscape(card);
+	sscape->type = SSCAPE;
+
+	dma[dev] &= 0x03;
+
+	ret = create_sscape(dev, card);
+	if (ret < 0)
+		goto _release_card;
+
+	ret = snd_card_register(card);
+	if (ret < 0) {
+		snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
+		goto _release_card;
+	}
+	dev_set_drvdata(pdev, card);
+	return 0;
+
+_release_card:
+	snd_card_free(card);
+	return ret;
+}
+
+static int snd_sscape_remove(struct device *devptr, unsigned int dev)
+{
+	snd_card_free(dev_get_drvdata(devptr));
+	return 0;
+}
+
+#define DEV_NAME "sscape"
+
+static struct isa_driver snd_sscape_driver = {
+	.match		= snd_sscape_match,
+	.probe		= snd_sscape_probe,
+	.remove		= snd_sscape_remove,
+	/* FIXME: suspend/resume */
+	.driver		= {
+		.name	= DEV_NAME
+	},
+};
+
+#ifdef CONFIG_PNP
+static inline int get_next_autoindex(int i)
+{
+	while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
+		++i;
+	return i;
+}
+
+
+static int sscape_pnp_detect(struct pnp_card_link *pcard,
+			     const struct pnp_card_device_id *pid)
+{
+	static int idx = 0;
+	struct pnp_dev *dev;
+	struct snd_card *card;
+	struct soundscape *sscape;
+	int ret;
+
+	/*
+	 * Allow this function to fail *quietly* if all the ISA PnP
+	 * devices were configured using module parameters instead.
+	 */
+	idx = get_next_autoindex(idx);
+	if (idx >= SNDRV_CARDS)
+		return -ENOSPC;
+
+	/*
+	 * Check that we still have room for another sound card ...
+	 */
+	dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
+	if (!dev)
+		return -ENODEV;
+
+	if (!pnp_is_active(dev)) {
+		if (pnp_activate_dev(dev) < 0) {
+			snd_printk(KERN_INFO "sscape: device is inactive\n");
+			return -EBUSY;
+		}
+	}
+
+	/*
+	 * Create a new ALSA sound card entry, in anticipation
+	 * of detecting our hardware ...
+	 */
+	ret = snd_card_new(&pcard->card->dev,
+			   index[idx], id[idx], THIS_MODULE,
+			   sizeof(struct soundscape), &card);
+	if (ret < 0)
+		return ret;
+
+	sscape = get_card_soundscape(card);
+
+	/*
+	 * Identify card model ...
+	 */
+	if (!strncmp("ENS4081", pid->id, 7))
+		sscape->type = SSCAPE_VIVO;
+	else
+		sscape->type = SSCAPE_PNP;
+
+	/*
+	 * Read the correct parameters off the ISA PnP bus ...
+	 */
+	port[idx] = pnp_port_start(dev, 0);
+	irq[idx] = pnp_irq(dev, 0);
+	mpu_irq[idx] = pnp_irq(dev, 1);
+	dma[idx] = pnp_dma(dev, 0) & 0x03;
+	if (sscape->type == SSCAPE_PNP) {
+		dma2[idx] = dma[idx];
+		wss_port[idx] = CODEC_IO(port[idx]);
+	} else {
+		wss_port[idx] = pnp_port_start(dev, 1);
+		dma2[idx] = pnp_dma(dev, 1);
+	}
+
+	ret = create_sscape(idx, card);
+	if (ret < 0)
+		goto _release_card;
+
+	ret = snd_card_register(card);
+	if (ret < 0) {
+		snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
+		goto _release_card;
+	}
+
+	pnp_set_card_drvdata(pcard, card);
+	++idx;
+	return 0;
+
+_release_card:
+	snd_card_free(card);
+	return ret;
+}
+
+static void sscape_pnp_remove(struct pnp_card_link *pcard)
+{
+	snd_card_free(pnp_get_card_drvdata(pcard));
+	pnp_set_card_drvdata(pcard, NULL);
+}
+
+static struct pnp_card_driver sscape_pnpc_driver = {
+	.flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
+	.name = "sscape",
+	.id_table = sscape_pnpids,
+	.probe = sscape_pnp_detect,
+	.remove = sscape_pnp_remove,
+};
+
+#endif /* CONFIG_PNP */
+
+static int __init sscape_init(void)
+{
+	int err;
+
+	err = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS);
+#ifdef CONFIG_PNP
+	if (!err)
+		isa_registered = 1;
+
+	err = pnp_register_card_driver(&sscape_pnpc_driver);
+	if (!err)
+		pnp_registered = 1;
+
+	if (isa_registered)
+		err = 0;
+#endif
+	return err;
+}
+
+static void __exit sscape_exit(void)
+{
+#ifdef CONFIG_PNP
+	if (pnp_registered)
+		pnp_unregister_card_driver(&sscape_pnpc_driver);
+	if (isa_registered)
+#endif
+		isa_unregister_driver(&snd_sscape_driver);
+}
+
+module_init(sscape_init);
+module_exit(sscape_exit);