Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 647 insertions, 0 deletions

diff --git a/sound/pci/aw2/aw2-alsa.c b/sound/pci/aw2/aw2-alsa.c
new file mode 100644
index 000000000..29a4bcdec
--- /dev/null
+++ b/sound/pci/aw2/aw2-alsa.c
@@ -0,0 +1,647 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*****************************************************************************
+ *
+ * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
+ * Jean-Christian Hassler <jhassler@free.fr>
+ *
+ * This file is part of the Audiowerk2 ALSA driver
+ *
+ *****************************************************************************/
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/control.h>
+
+#include "saa7146.h"
+#include "aw2-saa7146.h"
+
+MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
+	      "Jean-Christian Hassler <jhassler@free.fr>");
+MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
+MODULE_LICENSE("GPL");
+
+/*********************************
+ * DEFINES
+ ********************************/
+#define CTL_ROUTE_ANALOG 0
+#define CTL_ROUTE_DIGITAL 1
+
+/*********************************
+ * TYPEDEFS
+ ********************************/
+  /* hardware definition */
+static const struct snd_pcm_hardware snd_aw2_playback_hw = {
+	.info = (SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = SNDRV_PCM_RATE_44100,
+	.rate_min = 44100,
+	.rate_max = 44100,
+	.channels_min = 2,
+	.channels_max = 4,
+	.buffer_bytes_max = 32768,
+	.period_bytes_min = 4096,
+	.period_bytes_max = 32768,
+	.periods_min = 1,
+	.periods_max = 1024,
+};
+
+static const struct snd_pcm_hardware snd_aw2_capture_hw = {
+	.info = (SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = SNDRV_PCM_RATE_44100,
+	.rate_min = 44100,
+	.rate_max = 44100,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = 32768,
+	.period_bytes_min = 4096,
+	.period_bytes_max = 32768,
+	.periods_min = 1,
+	.periods_max = 1024,
+};
+
+struct aw2_pcm_device {
+	struct snd_pcm *pcm;
+	unsigned int stream_number;
+	struct aw2 *chip;
+};
+
+struct aw2 {
+	struct snd_aw2_saa7146 saa7146;
+
+	struct pci_dev *pci;
+	int irq;
+	spinlock_t reg_lock;
+	struct mutex mtx;
+
+	unsigned long iobase_phys;
+	void __iomem *iobase_virt;
+
+	struct snd_card *card;
+
+	struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
+	struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
+};
+
+/*********************************
+ * FUNCTION DECLARATIONS
+ ********************************/
+static int snd_aw2_create(struct snd_card *card, struct pci_dev *pci);
+static int snd_aw2_probe(struct pci_dev *pci,
+			 const struct pci_device_id *pci_id);
+static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
+static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
+					int cmd);
+static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
+				       int cmd);
+static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
+						      *substream);
+static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
+						     *substream);
+static int snd_aw2_new_pcm(struct aw2 *chip);
+
+static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
+					       struct snd_ctl_elem_info *uinfo);
+static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value
+					      *ucontrol);
+static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value
+					      *ucontrol);
+
+/*********************************
+ * VARIABLES
+ ********************************/
+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 Audiowerk2 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
+
+static const struct pci_device_id snd_aw2_ids[] = {
+	{PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
+	 0, 0, 0},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
+
+/* pci_driver definition */
+static struct pci_driver aw2_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_aw2_ids,
+	.probe = snd_aw2_probe,
+};
+
+module_pci_driver(aw2_driver);
+
+/* operators for playback PCM alsa interface */
+static const struct snd_pcm_ops snd_aw2_playback_ops = {
+	.open = snd_aw2_pcm_playback_open,
+	.close = snd_aw2_pcm_playback_close,
+	.prepare = snd_aw2_pcm_prepare_playback,
+	.trigger = snd_aw2_pcm_trigger_playback,
+	.pointer = snd_aw2_pcm_pointer_playback,
+};
+
+/* operators for capture PCM alsa interface */
+static const struct snd_pcm_ops snd_aw2_capture_ops = {
+	.open = snd_aw2_pcm_capture_open,
+	.close = snd_aw2_pcm_capture_close,
+	.prepare = snd_aw2_pcm_prepare_capture,
+	.trigger = snd_aw2_pcm_trigger_capture,
+	.pointer = snd_aw2_pcm_pointer_capture,
+};
+
+static const struct snd_kcontrol_new aw2_control = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "PCM Capture Route",
+	.index = 0,
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+	.private_value = 0xffff,
+	.info = snd_aw2_control_switch_capture_info,
+	.get = snd_aw2_control_switch_capture_get,
+	.put = snd_aw2_control_switch_capture_put
+};
+
+/*********************************
+ * FUNCTION IMPLEMENTATIONS
+ ********************************/
+
+/* component-destructor */
+static void snd_aw2_free(struct snd_card *card)
+{
+	struct aw2 *chip = card->private_data;
+
+	/* Free hardware */
+	snd_aw2_saa7146_free(&chip->saa7146);
+}
+
+/* chip-specific constructor */
+static int snd_aw2_create(struct snd_card *card,
+			  struct pci_dev *pci)
+{
+	struct aw2 *chip = card->private_data;
+	int err;
+
+	/* initialize the PCI entry */
+	err = pcim_enable_device(pci);
+	if (err < 0)
+		return err;
+	pci_set_master(pci);
+
+	/* check PCI availability (32bit DMA) */
+	if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
+		dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
+		return -ENXIO;
+	}
+
+	/* initialize the stuff */
+	chip->card = card;
+	chip->pci = pci;
+	chip->irq = -1;
+
+	/* (1) PCI resource allocation */
+	err = pcim_iomap_regions(pci, 1 << 0, "Audiowerk2");
+	if (err < 0)
+		return err;
+	chip->iobase_phys = pci_resource_start(pci, 0);
+	chip->iobase_virt = pcim_iomap_table(pci)[0];
+
+	/* (2) initialization of the chip hardware */
+	snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
+
+	if (devm_request_irq(&pci->dev, pci->irq, snd_aw2_saa7146_interrupt,
+			     IRQF_SHARED, KBUILD_MODNAME, chip)) {
+		dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
+		return -EBUSY;
+	}
+	chip->irq = pci->irq;
+	card->sync_irq = chip->irq;
+	card->private_free = snd_aw2_free;
+
+	dev_info(card->dev,
+		 "Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
+	return 0;
+}
+
+/* constructor */
+static int snd_aw2_probe(struct pci_dev *pci,
+			 const struct pci_device_id *pci_id)
+{
+	static int dev;
+	struct snd_card *card;
+	struct aw2 *chip;
+	int err;
+
+	/* (1) Continue if device is not enabled, else inc dev */
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	/* (2) Create card instance */
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+				sizeof(*chip), &card);
+	if (err < 0)
+		return err;
+	chip = card->private_data;
+
+	/* (3) Create main component */
+	err = snd_aw2_create(card, pci);
+	if (err < 0)
+		goto error;
+
+	/* initialize mutex */
+	mutex_init(&chip->mtx);
+	/* init spinlock */
+	spin_lock_init(&chip->reg_lock);
+	/* (4) Define driver ID and name string */
+	strcpy(card->driver, "aw2");
+	strcpy(card->shortname, "Audiowerk2");
+
+	sprintf(card->longname, "%s with SAA7146 irq %i",
+		card->shortname, chip->irq);
+
+	/* (5) Create other components */
+	snd_aw2_new_pcm(chip);
+
+	/* (6) Register card instance */
+	err = snd_card_register(card);
+	if (err < 0)
+		goto error;
+
+	/* (7) Set PCI driver data */
+	pci_set_drvdata(pci, card);
+
+	dev++;
+	return 0;
+
+ error:
+	snd_card_free(card);
+	return err;
+}
+
+/* open callback */
+static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	dev_dbg(substream->pcm->card->dev, "Playback_open\n");
+	runtime->hw = snd_aw2_playback_hw;
+	return 0;
+}
+
+/* close callback */
+static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
+{
+	return 0;
+
+}
+
+static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	dev_dbg(substream->pcm->card->dev, "Capture_open\n");
+	runtime->hw = snd_aw2_capture_hw;
+	return 0;
+}
+
+/* close callback */
+static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
+{
+	/* TODO: something to do ? */
+	return 0;
+}
+
+/* prepare callback for playback */
+static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
+{
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned long period_size, buffer_size;
+
+	mutex_lock(&chip->mtx);
+
+	period_size = snd_pcm_lib_period_bytes(substream);
+	buffer_size = snd_pcm_lib_buffer_bytes(substream);
+
+	snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
+					  pcm_device->stream_number,
+					  runtime->dma_addr, period_size,
+					  buffer_size);
+
+	/* Define Interrupt callback */
+	snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
+						    (snd_aw2_saa7146_it_cb)
+						    snd_pcm_period_elapsed,
+						    (void *)substream);
+
+	mutex_unlock(&chip->mtx);
+
+	return 0;
+}
+
+/* prepare callback for capture */
+static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
+{
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned long period_size, buffer_size;
+
+	mutex_lock(&chip->mtx);
+
+	period_size = snd_pcm_lib_period_bytes(substream);
+	buffer_size = snd_pcm_lib_buffer_bytes(substream);
+
+	snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
+					 pcm_device->stream_number,
+					 runtime->dma_addr, period_size,
+					 buffer_size);
+
+	/* Define Interrupt callback */
+	snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
+						   (snd_aw2_saa7146_it_cb)
+						   snd_pcm_period_elapsed,
+						   (void *)substream);
+
+	mutex_unlock(&chip->mtx);
+
+	return 0;
+}
+
+/* playback trigger callback */
+static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
+					int cmd)
+{
+	int status = 0;
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	spin_lock(&chip->reg_lock);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
+							   pcm_device->
+							   stream_number);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
+							  pcm_device->
+							  stream_number);
+		break;
+	default:
+		status = -EINVAL;
+	}
+	spin_unlock(&chip->reg_lock);
+	return status;
+}
+
+/* capture trigger callback */
+static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
+				       int cmd)
+{
+	int status = 0;
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	spin_lock(&chip->reg_lock);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
+							  pcm_device->
+							  stream_number);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
+							 pcm_device->
+							 stream_number);
+		break;
+	default:
+		status = -EINVAL;
+	}
+	spin_unlock(&chip->reg_lock);
+	return status;
+}
+
+/* playback pointer callback */
+static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
+						      *substream)
+{
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	unsigned int current_ptr;
+
+	/* get the current hardware pointer */
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	current_ptr =
+		snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
+						    pcm_device->stream_number,
+						    runtime->dma_area,
+						    runtime->buffer_size);
+
+	return bytes_to_frames(substream->runtime, current_ptr);
+}
+
+/* capture pointer callback */
+static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
+						     *substream)
+{
+	struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
+	struct aw2 *chip = pcm_device->chip;
+	unsigned int current_ptr;
+
+	/* get the current hardware pointer */
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	current_ptr =
+		snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
+						   pcm_device->stream_number,
+						   runtime->dma_area,
+						   runtime->buffer_size);
+
+	return bytes_to_frames(substream->runtime, current_ptr);
+}
+
+/* create a pcm device */
+static int snd_aw2_new_pcm(struct aw2 *chip)
+{
+	struct snd_pcm *pcm_playback_ana;
+	struct snd_pcm *pcm_playback_num;
+	struct snd_pcm *pcm_capture;
+	struct aw2_pcm_device *pcm_device;
+	int err = 0;
+
+	/* Create new Alsa PCM device */
+
+	err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
+			  &pcm_playback_ana);
+	if (err < 0) {
+		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
+		return err;
+	}
+
+	/* Creation ok */
+	pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
+
+	/* Set PCM device name */
+	strcpy(pcm_playback_ana->name, "Analog playback");
+	/* Associate private data to PCM device */
+	pcm_playback_ana->private_data = pcm_device;
+	/* set operators of PCM device */
+	snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_aw2_playback_ops);
+	/* store PCM device */
+	pcm_device->pcm = pcm_playback_ana;
+	/* give base chip pointer to our internal pcm device
+	   structure */
+	pcm_device->chip = chip;
+	/* Give stream number to PCM device */
+	pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
+
+	/* pre-allocation of buffers */
+	/* Preallocate continuous pages. */
+	snd_pcm_set_managed_buffer_all(pcm_playback_ana,
+				       SNDRV_DMA_TYPE_DEV,
+				       &chip->pci->dev,
+				       64 * 1024, 64 * 1024);
+
+	err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
+			  &pcm_playback_num);
+
+	if (err < 0) {
+		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
+		return err;
+	}
+	/* Creation ok */
+	pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
+
+	/* Set PCM device name */
+	strcpy(pcm_playback_num->name, "Digital playback");
+	/* Associate private data to PCM device */
+	pcm_playback_num->private_data = pcm_device;
+	/* set operators of PCM device */
+	snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_aw2_playback_ops);
+	/* store PCM device */
+	pcm_device->pcm = pcm_playback_num;
+	/* give base chip pointer to our internal pcm device
+	   structure */
+	pcm_device->chip = chip;
+	/* Give stream number to PCM device */
+	pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
+
+	/* pre-allocation of buffers */
+	/* Preallocate continuous pages. */
+	snd_pcm_set_managed_buffer_all(pcm_playback_num,
+				       SNDRV_DMA_TYPE_DEV,
+				       &chip->pci->dev,
+				       64 * 1024, 64 * 1024);
+
+	err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
+			  &pcm_capture);
+
+	if (err < 0) {
+		dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
+		return err;
+	}
+
+	/* Creation ok */
+	pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
+
+	/* Set PCM device name */
+	strcpy(pcm_capture->name, "Capture");
+	/* Associate private data to PCM device */
+	pcm_capture->private_data = pcm_device;
+	/* set operators of PCM device */
+	snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
+			&snd_aw2_capture_ops);
+	/* store PCM device */
+	pcm_device->pcm = pcm_capture;
+	/* give base chip pointer to our internal pcm device
+	   structure */
+	pcm_device->chip = chip;
+	/* Give stream number to PCM device */
+	pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
+
+	/* pre-allocation of buffers */
+	/* Preallocate continuous pages. */
+	snd_pcm_set_managed_buffer_all(pcm_capture,
+				       SNDRV_DMA_TYPE_DEV,
+				       &chip->pci->dev,
+				       64 * 1024, 64 * 1024);
+
+	/* Create control */
+	err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
+	if (err < 0) {
+		dev_err(chip->card->dev, "snd_ctl_add error (0x%X)\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
+					       struct snd_ctl_elem_info *uinfo)
+{
+	static const char * const texts[2] = {
+		"Analog", "Digital"
+	};
+	return snd_ctl_enum_info(uinfo, 1, 2, texts);
+}
+
+static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value
+					      *ucontrol)
+{
+	struct aw2 *chip = snd_kcontrol_chip(kcontrol);
+	if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
+		ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
+	else
+		ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
+	return 0;
+}
+
+static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
+					      struct snd_ctl_elem_value
+					      *ucontrol)
+{
+	struct aw2 *chip = snd_kcontrol_chip(kcontrol);
+	int changed = 0;
+	int is_disgital =
+	    snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
+
+	if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
+	     && !is_disgital)
+	    || ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
+		&& is_disgital)) {
+		snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
+		changed = 1;
+	}
+	return changed;
+}