From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- sound/soc/codecs/zl38060.c | 635 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 635 insertions(+) create mode 100644 sound/soc/codecs/zl38060.c (limited to 'sound/soc/codecs/zl38060.c') diff --git a/sound/soc/codecs/zl38060.c b/sound/soc/codecs/zl38060.c new file mode 100644 index 000000000..c3d0a2a7c --- /dev/null +++ b/sound/soc/codecs/zl38060.c @@ -0,0 +1,635 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Codec driver for Microsemi ZL38060 Connected Home Audio Processor. +// +// Copyright(c) 2020 Sven Van Asbroeck + +// The ZL38060 is very flexible and configurable. This driver implements only a +// tiny subset of the chip's possible configurations: +// +// - DSP block bypassed: DAI routed straight to DACs +// microphone routed straight to DAI +// - chip's internal clock is driven by a 12 MHz external crystal +// - chip's DAI connected to CPU is I2S, and bit + frame clock master +// - chip must be strapped for "host boot": in this mode, firmware will be +// provided by this driver. + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define DRV_NAME "zl38060" + +#define ZL38_RATES (SNDRV_PCM_RATE_8000 |\ + SNDRV_PCM_RATE_16000 |\ + SNDRV_PCM_RATE_48000) +#define ZL38_FORMATS SNDRV_PCM_FMTBIT_S16_LE + +#define HBI_FIRMWARE_PAGE 0xFF +#define ZL38_MAX_RAW_XFER 0x100 + +#define REG_TDMA_CFG_CLK 0x0262 +#define CFG_CLK_PCLK_SHIFT 4 +#define CFG_CLK_PCLK_MASK (0x7ff << CFG_CLK_PCLK_SHIFT) +#define CFG_CLK_PCLK(bits) ((bits - 1) << CFG_CLK_PCLK_SHIFT) +#define CFG_CLK_MASTER BIT(15) +#define CFG_CLK_FSRATE_MASK 0x7 +#define CFG_CLK_FSRATE_8KHZ 0x1 +#define CFG_CLK_FSRATE_16KHZ 0x2 +#define CFG_CLK_FSRATE_48KHZ 0x6 + +#define REG_CLK_CFG 0x0016 +#define CLK_CFG_SOURCE_XTAL BIT(15) + +#define REG_CLK_STATUS 0x0014 +#define CLK_STATUS_HWRST BIT(0) + +#define REG_PARAM_RESULT 0x0034 +#define PARAM_RESULT_READY 0xD3D3 + +#define REG_PG255_BASE_HI 0x000C +#define REG_PG255_OFFS(addr) ((HBI_FIRMWARE_PAGE << 8) | (addr & 0xFF)) +#define REG_FWR_EXEC 0x012C + +#define REG_CMD 0x0032 +#define REG_HW_REV 0x0020 +#define REG_FW_PROD 0x0022 +#define REG_FW_REV 0x0024 + +#define REG_SEMA_FLAGS 0x0006 +#define SEMA_FLAGS_BOOT_CMD BIT(0) +#define SEMA_FLAGS_APP_REBOOT BIT(1) + +#define REG_HW_REV 0x0020 +#define REG_FW_PROD 0x0022 +#define REG_FW_REV 0x0024 +#define REG_GPIO_DIR 0x02DC +#define REG_GPIO_DAT 0x02DA + +#define BOOTCMD_LOAD_COMPLETE 0x000D +#define BOOTCMD_FW_GO 0x0008 + +#define FIRMWARE_MAJOR 2 +#define FIRMWARE_MINOR 2 + +struct zl38_codec_priv { + struct device *dev; + struct regmap *regmap; + bool is_stream_in_use[2]; + struct gpio_chip *gpio_chip; +}; + +static int zl38_fw_issue_command(struct regmap *regmap, u16 cmd) +{ + unsigned int val; + int err; + + err = regmap_read_poll_timeout(regmap, REG_SEMA_FLAGS, val, + !(val & SEMA_FLAGS_BOOT_CMD), 10000, + 10000 * 100); + if (err) + return err; + err = regmap_write(regmap, REG_CMD, cmd); + if (err) + return err; + err = regmap_update_bits(regmap, REG_SEMA_FLAGS, SEMA_FLAGS_BOOT_CMD, + SEMA_FLAGS_BOOT_CMD); + if (err) + return err; + + return regmap_read_poll_timeout(regmap, REG_CMD, val, !val, 10000, + 10000 * 100); +} + +static int zl38_fw_go(struct regmap *regmap) +{ + int err; + + err = zl38_fw_issue_command(regmap, BOOTCMD_LOAD_COMPLETE); + if (err) + return err; + + return zl38_fw_issue_command(regmap, BOOTCMD_FW_GO); +} + +static int zl38_fw_enter_boot_mode(struct regmap *regmap) +{ + unsigned int val; + int err; + + err = regmap_update_bits(regmap, REG_CLK_STATUS, CLK_STATUS_HWRST, + CLK_STATUS_HWRST); + if (err) + return err; + + return regmap_read_poll_timeout(regmap, REG_PARAM_RESULT, val, + val == PARAM_RESULT_READY, 1000, 50000); +} + +static int +zl38_fw_send_data(struct regmap *regmap, u32 addr, const void *data, u16 len) +{ + __be32 addr_base = cpu_to_be32(addr & ~0xFF); + int err; + + err = regmap_raw_write(regmap, REG_PG255_BASE_HI, &addr_base, + sizeof(addr_base)); + if (err) + return err; + return regmap_raw_write(regmap, REG_PG255_OFFS(addr), data, len); +} + +static int zl38_fw_send_xaddr(struct regmap *regmap, const void *data) +{ + /* execution address from ihex: 32-bit little endian. + * device register expects 32-bit big endian. + */ + u32 addr = le32_to_cpup(data); + __be32 baddr = cpu_to_be32(addr); + + return regmap_raw_write(regmap, REG_FWR_EXEC, &baddr, sizeof(baddr)); +} + +static int zl38_load_firmware(struct device *dev, struct regmap *regmap) +{ + const struct ihex_binrec *rec; + const struct firmware *fw; + u32 addr; + u16 len; + int err; + + /* how to get this firmware: + * 1. request and download chip firmware from Microsemi + * (provided by Microsemi in srec format) + * 2. convert downloaded firmware from srec to ihex. Simple tool: + * https://gitlab.com/TheSven73/s3-to-irec + * 3. convert ihex to binary (.fw) using ihex2fw tool which is included + * with the Linux kernel sources + */ + err = request_ihex_firmware(&fw, "zl38060.fw", dev); + if (err) + return err; + err = zl38_fw_enter_boot_mode(regmap); + if (err) + goto out; + rec = (const struct ihex_binrec *)fw->data; + while (rec) { + addr = be32_to_cpu(rec->addr); + len = be16_to_cpu(rec->len); + if (addr) { + /* regular data ihex record */ + err = zl38_fw_send_data(regmap, addr, rec->data, len); + } else if (len == 4) { + /* execution address ihex record */ + err = zl38_fw_send_xaddr(regmap, rec->data); + } else { + err = -EINVAL; + } + if (err) + goto out; + /* next ! */ + rec = ihex_next_binrec(rec); + } + err = zl38_fw_go(regmap); + +out: + release_firmware(fw); + return err; +} + + +static int zl38_software_reset(struct regmap *regmap) +{ + unsigned int val; + int err; + + err = regmap_update_bits(regmap, REG_SEMA_FLAGS, SEMA_FLAGS_APP_REBOOT, + SEMA_FLAGS_APP_REBOOT); + if (err) + return err; + + /* wait for host bus interface to settle. + * Not sure if this is required: Microsemi's vendor driver does this, + * but the firmware manual does not mention it. Leave it in, there's + * little downside, apart from a slower reset. + */ + msleep(50); + + return regmap_read_poll_timeout(regmap, REG_SEMA_FLAGS, val, + !(val & SEMA_FLAGS_APP_REBOOT), 10000, + 10000 * 100); +} + +static int zl38_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct zl38_codec_priv *priv = snd_soc_dai_get_drvdata(dai); + int err; + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + /* firmware default is normal i2s */ + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + /* firmware default is normal bitclock and frame */ + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_CBP_CFP: + /* always 32 bits per frame (= 16 bits/channel, 2 channels) */ + err = regmap_update_bits(priv->regmap, REG_TDMA_CFG_CLK, + CFG_CLK_MASTER | CFG_CLK_PCLK_MASK, + CFG_CLK_MASTER | CFG_CLK_PCLK(32)); + if (err) + return err; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int zl38_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct zl38_codec_priv *priv = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + unsigned int fsrate; + int err; + + /* We cannot change hw_params while the dai is already in use - the + * software reset will corrupt the audio. However, this is not required, + * as the chip's TDM buses are fully symmetric, which mandates identical + * rates, channels, and samplebits for record and playback. + */ + if (priv->is_stream_in_use[!tx]) + goto skip_setup; + + switch (params_rate(params)) { + case 8000: + fsrate = CFG_CLK_FSRATE_8KHZ; + break; + case 16000: + fsrate = CFG_CLK_FSRATE_16KHZ; + break; + case 48000: + fsrate = CFG_CLK_FSRATE_48KHZ; + break; + default: + return -EINVAL; + } + + err = regmap_update_bits(priv->regmap, REG_TDMA_CFG_CLK, + CFG_CLK_FSRATE_MASK, fsrate); + if (err) + return err; + + /* chip requires a software reset to apply audio register changes */ + err = zl38_software_reset(priv->regmap); + if (err) + return err; + +skip_setup: + priv->is_stream_in_use[tx] = true; + + return 0; +} + +static int zl38_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct zl38_codec_priv *priv = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + + priv->is_stream_in_use[tx] = false; + + return 0; +} + +/* stereo bypass with no AEC */ +static const struct reg_sequence cp_config_stereo_bypass[] = { + /* interconnects must be programmed first */ + { 0x0210, 0x0005 }, /* DAC1 in <= I2S1-L */ + { 0x0212, 0x0006 }, /* DAC2 in <= I2S1-R */ + { 0x0214, 0x0001 }, /* I2S1-L in <= MIC1 */ + { 0x0216, 0x0001 }, /* I2S1-R in <= MIC1 */ + { 0x0224, 0x0000 }, /* AEC-S in <= n/a */ + { 0x0226, 0x0000 }, /* AEC-R in <= n/a */ + /* output enables must be programmed next */ + { 0x0202, 0x000F }, /* enable I2S1 + DAC */ +}; + +static const struct snd_soc_dai_ops zl38_dai_ops = { + .set_fmt = zl38_set_fmt, + .hw_params = zl38_hw_params, + .hw_free = zl38_hw_free, +}; + +static struct snd_soc_dai_driver zl38_dai = { + .name = "zl38060-tdma", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = ZL38_RATES, + .formats = ZL38_FORMATS, + }, + .capture = { + .stream_name = "Capture", + .channels_min = 2, + .channels_max = 2, + .rates = ZL38_RATES, + .formats = ZL38_FORMATS, + }, + .ops = &zl38_dai_ops, + .symmetric_rate = 1, + .symmetric_sample_bits = 1, + .symmetric_channels = 1, +}; + +static const struct snd_soc_dapm_widget zl38_dapm_widgets[] = { + SND_SOC_DAPM_OUTPUT("DAC1"), + SND_SOC_DAPM_OUTPUT("DAC2"), + + SND_SOC_DAPM_INPUT("DMICL"), +}; + +static const struct snd_soc_dapm_route zl38_dapm_routes[] = { + { "DAC1", NULL, "Playback" }, + { "DAC2", NULL, "Playback" }, + + { "Capture", NULL, "DMICL" }, +}; + +static const struct snd_soc_component_driver zl38_component_dev = { + .dapm_widgets = zl38_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(zl38_dapm_widgets), + .dapm_routes = zl38_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(zl38_dapm_routes), + .endianness = 1, +}; + +static void chip_gpio_set(struct gpio_chip *c, unsigned int offset, int val) +{ + struct regmap *regmap = gpiochip_get_data(c); + unsigned int mask = BIT(offset); + + regmap_update_bits(regmap, REG_GPIO_DAT, mask, val ? mask : 0); +} + +static int chip_gpio_get(struct gpio_chip *c, unsigned int offset) +{ + struct regmap *regmap = gpiochip_get_data(c); + unsigned int mask = BIT(offset); + unsigned int val; + int err; + + err = regmap_read(regmap, REG_GPIO_DAT, &val); + if (err) + return err; + + return !!(val & mask); +} + +static int chip_direction_input(struct gpio_chip *c, unsigned int offset) +{ + struct regmap *regmap = gpiochip_get_data(c); + unsigned int mask = BIT(offset); + + return regmap_update_bits(regmap, REG_GPIO_DIR, mask, 0); +} + +static int +chip_direction_output(struct gpio_chip *c, unsigned int offset, int val) +{ + struct regmap *regmap = gpiochip_get_data(c); + unsigned int mask = BIT(offset); + + chip_gpio_set(c, offset, val); + return regmap_update_bits(regmap, REG_GPIO_DIR, mask, mask); +} + +static const struct gpio_chip template_chip = { + .owner = THIS_MODULE, + .label = DRV_NAME, + + .base = -1, + .ngpio = 14, + .direction_input = chip_direction_input, + .direction_output = chip_direction_output, + .get = chip_gpio_get, + .set = chip_gpio_set, + + .can_sleep = true, +}; + +static int zl38_check_revision(struct device *dev, struct regmap *regmap) +{ + unsigned int hwrev, fwprod, fwrev; + int fw_major, fw_minor, fw_micro; + int err; + + err = regmap_read(regmap, REG_HW_REV, &hwrev); + if (err) + return err; + err = regmap_read(regmap, REG_FW_PROD, &fwprod); + if (err) + return err; + err = regmap_read(regmap, REG_FW_REV, &fwrev); + if (err) + return err; + + fw_major = (fwrev >> 12) & 0xF; + fw_minor = (fwrev >> 8) & 0xF; + fw_micro = fwrev & 0xFF; + dev_info(dev, "hw rev 0x%x, fw product code %d, firmware rev %d.%d.%d", + hwrev & 0x1F, fwprod, fw_major, fw_minor, fw_micro); + + if (fw_major != FIRMWARE_MAJOR || fw_minor < FIRMWARE_MINOR) { + dev_err(dev, "unsupported firmware. driver supports %d.%d", + FIRMWARE_MAJOR, FIRMWARE_MINOR); + return -EINVAL; + } + + return 0; +} + +static int zl38_bus_read(void *context, + const void *reg_buf, size_t reg_size, + void *val_buf, size_t val_size) +{ + struct spi_device *spi = context; + const u8 *reg_buf8 = reg_buf; + size_t len = 0; + u8 offs, page; + u8 txbuf[4]; + + if (reg_size != 2 || val_size > ZL38_MAX_RAW_XFER) + return -EINVAL; + + offs = reg_buf8[1] >> 1; + page = reg_buf8[0]; + + if (page) { + txbuf[len++] = 0xFE; + txbuf[len++] = page == HBI_FIRMWARE_PAGE ? 0xFF : page - 1; + txbuf[len++] = offs; + txbuf[len++] = val_size / 2 - 1; + } else { + txbuf[len++] = offs | 0x80; + txbuf[len++] = val_size / 2 - 1; + } + + return spi_write_then_read(spi, txbuf, len, val_buf, val_size); +} + +static int zl38_bus_write(void *context, const void *data, size_t count) +{ + struct spi_device *spi = context; + u8 buf[4 + ZL38_MAX_RAW_XFER]; + size_t val_len, len = 0; + const u8 *data8 = data; + u8 offs, page; + + if (count > (2 + ZL38_MAX_RAW_XFER) || count < 4) + return -EINVAL; + val_len = count - 2; + offs = data8[1] >> 1; + page = data8[0]; + + if (page) { + buf[len++] = 0xFE; + buf[len++] = page == HBI_FIRMWARE_PAGE ? 0xFF : page - 1; + buf[len++] = offs; + buf[len++] = (val_len / 2 - 1) | 0x80; + } else { + buf[len++] = offs | 0x80; + buf[len++] = (val_len / 2 - 1) | 0x80; + } + memcpy(buf + len, data8 + 2, val_len); + len += val_len; + + return spi_write(spi, buf, len); +} + +static const struct regmap_bus zl38_regmap_bus = { + .read = zl38_bus_read, + .write = zl38_bus_write, + .max_raw_write = ZL38_MAX_RAW_XFER, + .max_raw_read = ZL38_MAX_RAW_XFER, +}; + +static const struct regmap_config zl38_regmap_conf = { + .reg_bits = 16, + .val_bits = 16, + .reg_stride = 2, + .use_single_read = true, + .use_single_write = true, +}; + +static int zl38_spi_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct zl38_codec_priv *priv; + struct gpio_desc *reset_gpio; + int err; + + /* get the chip to a known state by putting it in reset */ + reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) + return PTR_ERR(reset_gpio); + if (reset_gpio) { + /* datasheet: need > 10us for a digital + analog reset */ + usleep_range(15, 50); + /* take the chip out of reset */ + gpiod_set_value_cansleep(reset_gpio, 0); + /* datasheet: need > 3ms for digital section to become stable */ + usleep_range(3000, 10000); + } + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + dev_set_drvdata(dev, priv); + priv->regmap = devm_regmap_init(dev, &zl38_regmap_bus, spi, + &zl38_regmap_conf); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); + + err = zl38_load_firmware(dev, priv->regmap); + if (err) + return err; + + err = zl38_check_revision(dev, priv->regmap); + if (err) + return err; + + priv->gpio_chip = devm_kmemdup(dev, &template_chip, + sizeof(template_chip), GFP_KERNEL); + if (!priv->gpio_chip) + return -ENOMEM; + priv->gpio_chip->parent = dev; + err = devm_gpiochip_add_data(dev, priv->gpio_chip, priv->regmap); + if (err) + return err; + + /* setup the cross-point switch for stereo bypass */ + err = regmap_multi_reg_write(priv->regmap, cp_config_stereo_bypass, + ARRAY_SIZE(cp_config_stereo_bypass)); + if (err) + return err; + /* setup for 12MHz crystal connected to the chip */ + err = regmap_update_bits(priv->regmap, REG_CLK_CFG, CLK_CFG_SOURCE_XTAL, + CLK_CFG_SOURCE_XTAL); + if (err) + return err; + + return devm_snd_soc_register_component(dev, &zl38_component_dev, + &zl38_dai, 1); +} + +static const struct of_device_id zl38_dt_ids[] = { + { .compatible = "mscc,zl38060", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, zl38_dt_ids); + +static const struct spi_device_id zl38_spi_ids[] = { + { "zl38060", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(spi, zl38_spi_ids); + +static struct spi_driver zl38060_spi_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(zl38_dt_ids), + }, + .probe = zl38_spi_probe, + .id_table = zl38_spi_ids, +}; +module_spi_driver(zl38060_spi_driver); + +MODULE_DESCRIPTION("ASoC ZL38060 driver"); +MODULE_AUTHOR("Sven Van Asbroeck "); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3