From patchwork Mon Apr 8 15:32:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Ogletree X-Patchwork-Id: 13621303 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F128F1CD21; Mon, 8 Apr 2024 15:32:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.152.168 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712590362; cv=none; b=fEwe2kiZqchWZzhiVfNbhPdVWbeQMh2v8W4Dit0PDU0Z0u3WCZ35eDSeSyrb7R6Kb+poz24i/2SlOiQd2THqH2yvM0gGAPOmQAguOKLhnTEhjrcjVJ44ZDcVgQ32uxR4QcK8pFXDT+N4ININ/eL+XnoozFhzvS1ASCTal+GgNxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712590362; c=relaxed/simple; bh=+VOo0YYRyBshkLPrUMPUcz2XGjWBvD8KRu++MdJSE/Q=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ABStVO9I2mN7uDNlLSesEC3fRUxeSesTkThVhoS+PIhdwCqacW5duJLLm9/wJHO49EqpvX6DzZ1TPKF40sAnyWhsjrJzSFig1SlN6t8AKc/mZeZWrdlaxp2n5o1jaTYm4G8xH6OBxT9pd5ZxUEyUF9hBsG4AuQbUqVOa76M+Wyc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com; spf=pass smtp.mailfrom=opensource.cirrus.com; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b=PmFn7qb3; arc=none smtp.client-ip=67.231.152.168 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="PmFn7qb3" Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4384tjps013759; Mon, 8 Apr 2024 10:32:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= PODMain02222019; bh=9riPzcKKiMQZeV/ofG1Vx73cq95VL7RPbwW2+jnBctA=; b= PmFn7qb3BPc7JQe8/gsXSBZnncTC9xK/+NfzqOP/J5at+/E11DnYAmg2VRE8eQgV Epji0uD5S4rMubvwOreCvrUpVy5yGXGfdsqjbuL7lrrAfZPD84Q3J56BOFQFxF0X 8qd7s/pG1u+DU8Z7DAgBJNiDGBVMw4DIaqQtYd7ICwoWU6QMMka415R655CKEqBP kYm+2mUIF6EBHJA0eZC8jW+Mm3MQRs7dAkmPHjwZaD3Xk5Gq1u5PqvZQ/6DhJqp1 4ljnf+7mmd6JqB4T2DPRZbX2ERLcfmfIWwLdSp52qECZRzS4DH4JVwl/XzMVmkDZ QaJXbv78Wdf9W4bmss9nMw== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3xb2tjhy7y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Apr 2024 10:32:31 -0500 (CDT) Received: from ediex02.ad.cirrus.com (198.61.84.81) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 8 Apr 2024 16:32:30 +0100 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by anon-ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server id 15.2.1544.9 via Frontend Transport; Mon, 8 Apr 2024 16:32:30 +0100 Received: from aus-sw-rshr002.ad.cirrus.com (aus-sw-rshr002.ad.cirrus.com [141.131.145.53]) by ediswmail9.ad.cirrus.com (Postfix) with ESMTP id A4F39820242; Mon, 8 Apr 2024 15:32:28 +0000 (UTC) From: James Ogletree To: , , , , , , CC: , , , , James Ogletree Subject: [PATCH RESEND v10 3/5] mfd: cs40l50: Add support for CS40L50 core driver Date: Mon, 8 Apr 2024 15:32:12 +0000 Message-ID: <20240408153214.42368-4-jogletre@opensource.cirrus.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240408153214.42368-1-jogletre@opensource.cirrus.com> References: <20240408153214.42368-1-jogletre@opensource.cirrus.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: SUi1q-TemOCDRHPjeOe5aQjwbgmB2yYZ X-Proofpoint-GUID: SUi1q-TemOCDRHPjeOe5aQjwbgmB2yYZ X-Proofpoint-Spam-Reason: safe Introduce support for Cirrus Logic Device CS40L50: a haptic driver with waveform memory, integrated DSP, and closed-loop algorithms. The MFD component registers and initializes the device. Signed-off-by: James Ogletree --- MAINTAINERS | 2 + drivers/mfd/Kconfig | 30 ++ drivers/mfd/Makefile | 4 + drivers/mfd/cs40l50-core.c | 570 ++++++++++++++++++++++++++++++++++++ drivers/mfd/cs40l50-i2c.c | 68 +++++ drivers/mfd/cs40l50-spi.c | 68 +++++ include/linux/mfd/cs40l50.h | 137 +++++++++ 7 files changed, 879 insertions(+) create mode 100644 drivers/mfd/cs40l50-core.c create mode 100644 drivers/mfd/cs40l50-i2c.c create mode 100644 drivers/mfd/cs40l50-spi.c create mode 100644 include/linux/mfd/cs40l50.h diff --git a/MAINTAINERS b/MAINTAINERS index 862a18e3fc7b..e804f3766cba 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4940,6 +4940,8 @@ M: Ben Bright L: patches@opensource.cirrus.com S: Supported F: Documentation/devicetree/bindings/input/cirrus,cs40l50.yaml +F: drivers/mfd/cs40l* +F: include/linux/mfd/cs40l* CIRRUS LOGIC DSP FIRMWARE DRIVER M: Simon Trimmer diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 90ce58fd629e..6273c255f107 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2241,6 +2241,36 @@ config MCP_UCB1200_TS endmenu +config MFD_CS40L50_CORE + tristate + select MFD_CORE + select FW_CS_DSP + select REGMAP_IRQ + +config MFD_CS40L50_I2C + tristate "Cirrus Logic CS40L50 (I2C)" + select REGMAP_I2C + select MFD_CS40L50_CORE + depends on I2C + help + Select this to support the Cirrus Logic CS40L50 Haptic + Driver over I2C. + + This driver can be built as a module. If built as a module it will be + called "cs40l50-i2c". + +config MFD_CS40L50_SPI + tristate "Cirrus Logic CS40L50 (SPI)" + select REGMAP_SPI + select MFD_CS40L50_CORE + depends on SPI + help + Select this to support the Cirrus Logic CS40L50 Haptic + Driver over SPI. + + This driver can be built as a module. If built as a module it will be + called "cs40l50-spi". + config MFD_VEXPRESS_SYSREG tristate "Versatile Express System Registers" depends on VEXPRESS_CONFIG && GPIOLIB diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index c66f07edcd0e..a8d18ba155d0 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -88,6 +88,10 @@ obj-$(CONFIG_MFD_MADERA) += madera.o obj-$(CONFIG_MFD_MADERA_I2C) += madera-i2c.o obj-$(CONFIG_MFD_MADERA_SPI) += madera-spi.o +obj-$(CONFIG_MFD_CS40L50_CORE) += cs40l50-core.o +obj-$(CONFIG_MFD_CS40L50_I2C) += cs40l50-i2c.o +obj-$(CONFIG_MFD_CS40L50_SPI) += cs40l50-spi.o + obj-$(CONFIG_TPS6105X) += tps6105x.o obj-$(CONFIG_TPS65010) += tps65010.o obj-$(CONFIG_TPS6507X) += tps6507x.o diff --git a/drivers/mfd/cs40l50-core.c b/drivers/mfd/cs40l50-core.c new file mode 100644 index 000000000000..34d0b1cfc486 --- /dev/null +++ b/drivers/mfd/cs40l50-core.c @@ -0,0 +1,570 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CS40L50 Advanced Haptic Driver with waveform memory, + * integrated DSP, and closed-loop algorithms + * + * Copyright 2024 Cirrus Logic, Inc. + * + * Author: James Ogletree + */ + +#include +#include +#include +#include +#include +#include + +static const struct mfd_cell cs40l50_devs[] = { + { .name = "cs40l50-codec", }, + { .name = "cs40l50-vibra", }, +}; + +const struct regmap_config cs40l50_regmap = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .reg_format_endian = REGMAP_ENDIAN_BIG, + .val_format_endian = REGMAP_ENDIAN_BIG, +}; +EXPORT_SYMBOL_GPL(cs40l50_regmap); + +static const char * const cs40l50_supplies[] = { + "vdd-io", +}; + +static const struct regmap_irq cs40l50_reg_irqs[] = { + REGMAP_IRQ_REG(CS40L50_DSP_QUEUE_IRQ, CS40L50_IRQ1_INT_2_OFFSET, + CS40L50_DSP_QUEUE_MASK), + REGMAP_IRQ_REG(CS40L50_AMP_SHORT_IRQ, CS40L50_IRQ1_INT_1_OFFSET, + CS40L50_AMP_SHORT_MASK), + REGMAP_IRQ_REG(CS40L50_TEMP_ERR_IRQ, CS40L50_IRQ1_INT_8_OFFSET, + CS40L50_TEMP_ERR_MASK), + REGMAP_IRQ_REG(CS40L50_BST_UVP_IRQ, CS40L50_IRQ1_INT_9_OFFSET, + CS40L50_BST_UVP_MASK), + REGMAP_IRQ_REG(CS40L50_BST_SHORT_IRQ, CS40L50_IRQ1_INT_9_OFFSET, + CS40L50_BST_SHORT_MASK), + REGMAP_IRQ_REG(CS40L50_BST_ILIMIT_IRQ, CS40L50_IRQ1_INT_9_OFFSET, + CS40L50_BST_ILIMIT_MASK), + REGMAP_IRQ_REG(CS40L50_UVLO_VDDBATT_IRQ, CS40L50_IRQ1_INT_10_OFFSET, + CS40L50_UVLO_VDDBATT_MASK), + REGMAP_IRQ_REG(CS40L50_GLOBAL_ERROR_IRQ, CS40L50_IRQ1_INT_18_OFFSET, + CS40L50_GLOBAL_ERROR_MASK), +}; + +static struct regmap_irq_chip cs40l50_irq_chip = { + .name = "cs40l50", + .status_base = CS40L50_IRQ1_INT_1, + .mask_base = CS40L50_IRQ1_MASK_1, + .ack_base = CS40L50_IRQ1_INT_1, + .num_regs = 22, + .irqs = cs40l50_reg_irqs, + .num_irqs = ARRAY_SIZE(cs40l50_reg_irqs), + .runtime_pm = true, +}; + +int cs40l50_dsp_write(struct device *dev, struct regmap *regmap, u32 val) +{ + int i, ret; + u32 ack; + + /* Device NAKs if hibernating, so optionally retry */ + for (i = 0; i < CS40L50_DSP_TIMEOUT_COUNT; i++) { + ret = regmap_write(regmap, CS40L50_DSP_QUEUE, val); + if (!ret) + break; + + usleep_range(CS40L50_DSP_POLL_US, CS40L50_DSP_POLL_US + 100); + } + + /* If write never occurred, don't bother polling for ACK */ + if (i == CS40L50_DSP_TIMEOUT_COUNT) { + dev_err(dev, "Timed out writing %#X to DSP: %d\n", val, ret); + return ret; + } + + ret = regmap_read_poll_timeout(regmap, CS40L50_DSP_QUEUE, ack, !ack, + CS40L50_DSP_POLL_US, + CS40L50_DSP_POLL_US * CS40L50_DSP_TIMEOUT_COUNT); + if (ret) + dev_err(dev, "DSP failed to ACK %#X: %d\n", val, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(cs40l50_dsp_write); + +static const struct cs_dsp_region cs40l50_dsp_regions[] = { + { .type = WMFW_HALO_PM_PACKED, .base = CS40L50_PMEM_0 }, + { .type = WMFW_HALO_XM_PACKED, .base = CS40L50_XMEM_PACKED_0 }, + { .type = WMFW_HALO_YM_PACKED, .base = CS40L50_YMEM_PACKED_0 }, + { .type = WMFW_ADSP2_XM, .base = CS40L50_XMEM_UNPACKED24_0 }, + { .type = WMFW_ADSP2_YM, .base = CS40L50_YMEM_UNPACKED24_0 }, +}; + +static const struct reg_sequence cs40l50_internal_vamp_config[] = { + { CS40L50_BST_LPMODE_SEL, CS40L50_DCM_LOW_POWER }, + { CS40L50_BLOCK_ENABLES2, CS40L50_OVERTEMP_WARN }, +}; + +static const struct reg_sequence cs40l50_irq_mask_override[] = { + { CS40L50_IRQ1_MASK_2, CS40L50_IRQ_MASK_2_OVERRIDE }, + { CS40L50_IRQ1_MASK_20, CS40L50_IRQ_MASK_20_OVERRIDE }, +}; + +static int cs40l50_wseq_init(struct cs40l50 *cs40l50) +{ + struct cs_dsp *dsp = &cs40l50->dsp; + + cs40l50->wseqs[CS40L50_STANDBY].ctl = cs_dsp_get_ctl(dsp, "STANDBY_SEQUENCE", + WMFW_ADSP2_XM, + CS40L50_PM_ALGO); + if (!cs40l50->wseqs[CS40L50_STANDBY].ctl) { + dev_err(cs40l50->dev, "Control not found for standby sequence\n"); + return -ENOENT; + } + + cs40l50->wseqs[CS40L50_ACTIVE].ctl = cs_dsp_get_ctl(dsp, "ACTIVE_SEQUENCE", + WMFW_ADSP2_XM, + CS40L50_PM_ALGO); + if (!cs40l50->wseqs[CS40L50_ACTIVE].ctl) { + dev_err(cs40l50->dev, "Control not found for active sequence\n"); + return -ENOENT; + } + + cs40l50->wseqs[CS40L50_PWR_ON].ctl = cs_dsp_get_ctl(dsp, "PM_PWR_ON_SEQ", + WMFW_ADSP2_XM, + CS40L50_PM_ALGO); + if (!cs40l50->wseqs[CS40L50_PWR_ON].ctl) { + dev_err(cs40l50->dev, "Control not found for power-on sequence\n"); + return -ENOENT; + } + + return cs_dsp_wseq_init(&cs40l50->dsp, cs40l50->wseqs, ARRAY_SIZE(cs40l50->wseqs)); +} + +static int cs40l50_dsp_config(struct cs40l50 *cs40l50) +{ + int ret; + + /* Configure internal V_AMP supply */ + ret = regmap_multi_reg_write(cs40l50->regmap, cs40l50_internal_vamp_config, + ARRAY_SIZE(cs40l50_internal_vamp_config)); + if (ret) + return ret; + + ret = cs_dsp_wseq_multi_write(&cs40l50->dsp, &cs40l50->wseqs[CS40L50_PWR_ON], + cs40l50_internal_vamp_config, CS_DSP_WSEQ_FULL, + ARRAY_SIZE(cs40l50_internal_vamp_config), false); + if (ret) + return ret; + + /* Override firmware defaults for IRQ masks */ + ret = regmap_multi_reg_write(cs40l50->regmap, cs40l50_irq_mask_override, + ARRAY_SIZE(cs40l50_irq_mask_override)); + if (ret) + return ret; + + return cs_dsp_wseq_multi_write(&cs40l50->dsp, &cs40l50->wseqs[CS40L50_PWR_ON], + cs40l50_irq_mask_override, CS_DSP_WSEQ_FULL, + ARRAY_SIZE(cs40l50_irq_mask_override), false); +} + +static int cs40l50_dsp_post_run(struct cs_dsp *dsp) +{ + struct cs40l50 *cs40l50 = container_of(dsp, struct cs40l50, dsp); + int ret; + + ret = cs40l50_wseq_init(cs40l50); + if (ret) + return ret; + + ret = cs40l50_dsp_config(cs40l50); + if (ret) { + dev_err(cs40l50->dev, "Failed to configure DSP: %d\n", ret); + return ret; + } + + ret = devm_mfd_add_devices(cs40l50->dev, PLATFORM_DEVID_NONE, cs40l50_devs, + ARRAY_SIZE(cs40l50_devs), NULL, 0, NULL); + if (ret) + dev_err(cs40l50->dev, "Failed to add child devices: %d\n", ret); + + return ret; +} + +static const struct cs_dsp_client_ops client_ops = { + .post_run = cs40l50_dsp_post_run, +}; + +static void cs40l50_dsp_remove(void *data) +{ + cs_dsp_remove(data); +} + +static int cs40l50_dsp_init(struct cs40l50 *cs40l50) +{ + int ret; + + cs40l50->dsp.num = 1; + cs40l50->dsp.type = WMFW_HALO; + cs40l50->dsp.dev = cs40l50->dev; + cs40l50->dsp.regmap = cs40l50->regmap; + cs40l50->dsp.base = CS40L50_CORE_BASE; + cs40l50->dsp.base_sysinfo = CS40L50_SYS_INFO_ID; + cs40l50->dsp.mem = cs40l50_dsp_regions; + cs40l50->dsp.num_mems = ARRAY_SIZE(cs40l50_dsp_regions); + cs40l50->dsp.no_core_startstop = true; + cs40l50->dsp.client_ops = &client_ops; + + ret = cs_dsp_halo_init(&cs40l50->dsp); + if (ret) + return ret; + + return devm_add_action_or_reset(cs40l50->dev, cs40l50_dsp_remove, + &cs40l50->dsp); +} + +static int cs40l50_reset_dsp(struct cs40l50 *cs40l50) +{ + int ret; + + mutex_lock(&cs40l50->lock); + + if (cs40l50->dsp.running) + cs_dsp_stop(&cs40l50->dsp); + + if (cs40l50->dsp.booted) + cs_dsp_power_down(&cs40l50->dsp); + + ret = cs40l50_dsp_write(cs40l50->dev, cs40l50->regmap, CS40L50_SHUTDOWN); + if (ret) + goto err_mutex; + + ret = cs_dsp_power_up(&cs40l50->dsp, cs40l50->fw, "cs40l50.wmfw", + cs40l50->bin, "cs40l50.bin", "cs40l50"); + if (ret) + goto err_mutex; + + ret = cs40l50_dsp_write(cs40l50->dev, cs40l50->regmap, CS40L50_SYSTEM_RESET); + if (ret) + goto err_mutex; + + ret = cs40l50_dsp_write(cs40l50->dev, cs40l50->regmap, CS40L50_PREVENT_HIBER); + if (ret) + goto err_mutex; + + ret = cs_dsp_run(&cs40l50->dsp); +err_mutex: + mutex_unlock(&cs40l50->lock); + + return ret; +} + +static void cs40l50_dsp_power_down(void *data) +{ + cs_dsp_power_down(data); +} + +static void cs40l50_dsp_stop(void *data) +{ + cs_dsp_stop(data); +} + +static void cs40l50_dsp_bringup(const struct firmware *bin, void *context) +{ + struct cs40l50 *cs40l50 = context; + u32 nwaves; + int ret; + + /* Wavetable is optional; bringup DSP regardless */ + cs40l50->bin = bin; + + ret = cs40l50_reset_dsp(cs40l50); + if (ret) { + dev_err(cs40l50->dev, "Failed to reset DSP: %d\n", ret); + goto err_fw; + } + + ret = regmap_read(cs40l50->regmap, CS40L50_NUM_WAVES, &nwaves); + if (ret) + goto err_fw; + + dev_info(cs40l50->dev, "%u RAM effects loaded\n", nwaves); + + /* Add teardown actions for first-time bringup */ + ret = devm_add_action_or_reset(cs40l50->dev, cs40l50_dsp_power_down, + &cs40l50->dsp); + if (ret) { + dev_err(cs40l50->dev, "Failed to add power down action: %d\n", ret); + goto err_fw; + } + + ret = devm_add_action_or_reset(cs40l50->dev, cs40l50_dsp_stop, &cs40l50->dsp); + if (ret) + dev_err(cs40l50->dev, "Failed to add stop action: %d\n", ret); +err_fw: + release_firmware(cs40l50->bin); + release_firmware(cs40l50->fw); +} + +static void cs40l50_request_firmware(const struct firmware *fw, void *context) +{ + struct cs40l50 *cs40l50 = context; + int ret; + + if (!fw) { + dev_err(cs40l50->dev, "No firmware file found\n"); + return; + } + + cs40l50->fw = fw; + + ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, CS40L50_WT, + cs40l50->dev, GFP_KERNEL, cs40l50, + cs40l50_dsp_bringup); + if (ret) { + dev_err(cs40l50->dev, "Failed to request %s: %d\n", CS40L50_WT, ret); + release_firmware(cs40l50->fw); + } +} + +struct cs40l50_irq { + const char *name; + int virq; +}; + +static struct cs40l50_irq cs40l50_irqs[] = { + { "DSP", }, + { "Global", }, + { "Boost UVLO", }, + { "Boost current limit", }, + { "Boost short", }, + { "Boost undervolt", }, + { "Overtemp", }, + { "Amp short", }, +}; + +static const struct reg_sequence cs40l50_err_rls[] = { + { CS40L50_ERR_RLS, CS40L50_GLOBAL_ERR_RLS_SET }, + { CS40L50_ERR_RLS, CS40L50_GLOBAL_ERR_RLS_CLEAR }, +}; + +static irqreturn_t cs40l50_hw_err(int irq, void *data) +{ + struct cs40l50 *cs40l50 = data; + int ret = 0, i; + + mutex_lock(&cs40l50->lock); + + /* Log hardware interrupt and execute error release sequence */ + for (i = 1; i < ARRAY_SIZE(cs40l50_irqs); i++) { + if (cs40l50_irqs[i].virq == irq) { + dev_err(cs40l50->dev, "%s error\n", cs40l50_irqs[i].name); + ret = regmap_multi_reg_write(cs40l50->regmap, cs40l50_err_rls, + ARRAY_SIZE(cs40l50_err_rls)); + break; + } + } + + mutex_unlock(&cs40l50->lock); + return IRQ_RETVAL(!ret); +} + +static irqreturn_t cs40l50_dsp_queue(int irq, void *data) +{ + struct cs40l50 *cs40l50 = data; + u32 rd_ptr, val, wt_ptr; + int ret = 0; + + mutex_lock(&cs40l50->lock); + + /* Read from DSP queue, log, and update read pointer */ + while (!ret) { + ret = regmap_read(cs40l50->regmap, CS40L50_DSP_QUEUE_WT, &wt_ptr); + if (ret) + break; + + ret = regmap_read(cs40l50->regmap, CS40L50_DSP_QUEUE_RD, &rd_ptr); + if (ret) + break; + + /* Check if queue is empty */ + if (wt_ptr == rd_ptr) + break; + + ret = regmap_read(cs40l50->regmap, rd_ptr, &val); + if (ret) + break; + + dev_dbg(cs40l50->dev, "DSP payload: %#X", val); + + rd_ptr += sizeof(u32); + + if (rd_ptr > CS40L50_DSP_QUEUE_END) + rd_ptr = CS40L50_DSP_QUEUE_BASE; + + ret = regmap_write(cs40l50->regmap, CS40L50_DSP_QUEUE_RD, rd_ptr); + } + + mutex_unlock(&cs40l50->lock); + + return IRQ_RETVAL(!ret); +} + +static int cs40l50_irq_init(struct cs40l50 *cs40l50) +{ + int ret, i, virq; + + ret = devm_regmap_add_irq_chip(cs40l50->dev, cs40l50->regmap, cs40l50->irq, + IRQF_ONESHOT | IRQF_SHARED, 0, + &cs40l50_irq_chip, &cs40l50->irq_data); + if (ret) { + dev_err(cs40l50->dev, "Failed adding IRQ chip\n"); + return ret; + } + + for (i = 0; i < ARRAY_SIZE(cs40l50_irqs); i++) { + virq = regmap_irq_get_virq(cs40l50->irq_data, i); + if (virq < 0) { + dev_err(cs40l50->dev, "Failed getting virq for %s\n", + cs40l50_irqs[i].name); + return virq; + } + + cs40l50_irqs[i].virq = virq; + + /* Handle DSP and hardware interrupts separately */ + ret = devm_request_threaded_irq(cs40l50->dev, virq, NULL, + i ? cs40l50_hw_err : cs40l50_dsp_queue, + IRQF_ONESHOT | IRQF_SHARED, + cs40l50_irqs[i].name, cs40l50); + if (ret) { + return dev_err_probe(cs40l50->dev, ret, + "Failed requesting %s IRQ\n", + cs40l50_irqs[i].name); + } + } + + return 0; +} + +static int cs40l50_get_model(struct cs40l50 *cs40l50) +{ + int ret; + + ret = regmap_read(cs40l50->regmap, CS40L50_DEVID, &cs40l50->devid); + if (ret) + return ret; + + if (cs40l50->devid != CS40L50_DEVID_A) + return -EINVAL; + + ret = regmap_read(cs40l50->regmap, CS40L50_REVID, &cs40l50->revid); + if (ret) + return ret; + + if (cs40l50->revid < CS40L50_REVID_B0) + return -EINVAL; + + dev_dbg(cs40l50->dev, "Cirrus Logic CS40L50 rev. %02X\n", cs40l50->revid); + + return 0; +} + +static int cs40l50_pm_runtime_setup(struct device *dev) +{ + int ret; + + pm_runtime_set_autosuspend_delay(dev, CS40L50_AUTOSUSPEND_MS); + pm_runtime_use_autosuspend(dev); + pm_runtime_get_noresume(dev); + ret = pm_runtime_set_active(dev); + if (ret) + return ret; + + return devm_pm_runtime_enable(dev); +} + +int cs40l50_probe(struct cs40l50 *cs40l50) +{ + struct device *dev = cs40l50->dev; + int ret; + + mutex_init(&cs40l50->lock); + + cs40l50->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(cs40l50->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(cs40l50->reset_gpio), + "Failed getting reset GPIO\n"); + + ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(cs40l50_supplies), + cs40l50_supplies); + if (ret) + return dev_err_probe(dev, ret, "Failed getting supplies\n"); + + /* Ensure minimum reset pulse width */ + usleep_range(CS40L50_RESET_PULSE_US, CS40L50_RESET_PULSE_US + 100); + + gpiod_set_value_cansleep(cs40l50->reset_gpio, 0); + + /* Wait for control port to be ready */ + usleep_range(CS40L50_CP_READY_US, CS40L50_CP_READY_US + 100); + + ret = cs40l50_get_model(cs40l50); + if (ret) + return dev_err_probe(dev, ret, "Failed to get part number\n"); + + ret = cs40l50_dsp_init(cs40l50); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize DSP\n"); + + ret = cs40l50_pm_runtime_setup(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize runtime PM\n"); + + ret = cs40l50_irq_init(cs40l50); + if (ret) + return ret; + + ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, CS40L50_FW, + dev, GFP_KERNEL, cs40l50, cs40l50_request_firmware); + if (ret) + return dev_err_probe(dev, ret, "Failed to request %s\n", CS40L50_FW); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; +} +EXPORT_SYMBOL_GPL(cs40l50_probe); + +int cs40l50_remove(struct cs40l50 *cs40l50) +{ + gpiod_set_value_cansleep(cs40l50->reset_gpio, 1); + + return 0; +} +EXPORT_SYMBOL_GPL(cs40l50_remove); + +static int cs40l50_runtime_suspend(struct device *dev) +{ + struct cs40l50 *cs40l50 = dev_get_drvdata(dev); + + return regmap_write(cs40l50->regmap, CS40L50_DSP_QUEUE, CS40L50_ALLOW_HIBER); +} + +static int cs40l50_runtime_resume(struct device *dev) +{ + struct cs40l50 *cs40l50 = dev_get_drvdata(dev); + + return cs40l50_dsp_write(dev, cs40l50->regmap, CS40L50_PREVENT_HIBER); +} + +EXPORT_GPL_DEV_PM_OPS(cs40l50_pm_ops) = { + RUNTIME_PM_OPS(cs40l50_runtime_suspend, cs40l50_runtime_resume, NULL) +}; + +MODULE_DESCRIPTION("CS40L50 Advanced Haptic Driver"); +MODULE_AUTHOR("James Ogletree, Cirrus Logic Inc. "); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(FW_CS_DSP); diff --git a/drivers/mfd/cs40l50-i2c.c b/drivers/mfd/cs40l50-i2c.c new file mode 100644 index 000000000000..639be743d956 --- /dev/null +++ b/drivers/mfd/cs40l50-i2c.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CS40L50 Advanced Haptic Driver with waveform memory, + * integrated DSP, and closed-loop algorithms + * + * Copyright 2024 Cirrus Logic, Inc. + * + * Author: James Ogletree + */ + +#include +#include + +static int cs40l50_i2c_probe(struct i2c_client *i2c) +{ + struct cs40l50 *cs40l50; + + cs40l50 = devm_kzalloc(&i2c->dev, sizeof(*cs40l50), GFP_KERNEL); + if (!cs40l50) + return -ENOMEM; + + i2c_set_clientdata(i2c, cs40l50); + + cs40l50->dev = &i2c->dev; + cs40l50->irq = i2c->irq; + + cs40l50->regmap = devm_regmap_init_i2c(i2c, &cs40l50_regmap); + if (IS_ERR(cs40l50->regmap)) + return dev_err_probe(cs40l50->dev, PTR_ERR(cs40l50->regmap), + "Failed to initialize register map\n"); + + return cs40l50_probe(cs40l50); +} + +static void cs40l50_i2c_remove(struct i2c_client *i2c) +{ + struct cs40l50 *cs40l50 = i2c_get_clientdata(i2c); + + cs40l50_remove(cs40l50); +} + +static const struct i2c_device_id cs40l50_id_i2c[] = { + { "cs40l50" }, + {} +}; +MODULE_DEVICE_TABLE(i2c, cs40l50_id_i2c); + +static const struct of_device_id cs40l50_of_match[] = { + { .compatible = "cirrus,cs40l50" }, + {} +}; +MODULE_DEVICE_TABLE(of, cs40l50_of_match); + +static struct i2c_driver cs40l50_i2c_driver = { + .driver = { + .name = "cs40l50", + .of_match_table = cs40l50_of_match, + .pm = pm_ptr(&cs40l50_pm_ops), + }, + .id_table = cs40l50_id_i2c, + .probe = cs40l50_i2c_probe, + .remove = cs40l50_i2c_remove, +}; +module_i2c_driver(cs40l50_i2c_driver); + +MODULE_DESCRIPTION("CS40L50 I2C Driver"); +MODULE_AUTHOR("James Ogletree, Cirrus Logic Inc. "); +MODULE_LICENSE("GPL"); diff --git a/drivers/mfd/cs40l50-spi.c b/drivers/mfd/cs40l50-spi.c new file mode 100644 index 000000000000..53526b595a0d --- /dev/null +++ b/drivers/mfd/cs40l50-spi.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CS40L50 Advanced Haptic Driver with waveform memory, + * integrated DSP, and closed-loop algorithms + * + * Copyright 2024 Cirrus Logic, Inc. + * + * Author: James Ogletree + */ + +#include +#include + +static int cs40l50_spi_probe(struct spi_device *spi) +{ + struct cs40l50 *cs40l50; + + cs40l50 = devm_kzalloc(&spi->dev, sizeof(*cs40l50), GFP_KERNEL); + if (!cs40l50) + return -ENOMEM; + + spi_set_drvdata(spi, cs40l50); + + cs40l50->dev = &spi->dev; + cs40l50->irq = spi->irq; + + cs40l50->regmap = devm_regmap_init_spi(spi, &cs40l50_regmap); + if (IS_ERR(cs40l50->regmap)) + return dev_err_probe(cs40l50->dev, PTR_ERR(cs40l50->regmap), + "Failed to initialize register map\n"); + + return cs40l50_probe(cs40l50); +} + +static void cs40l50_spi_remove(struct spi_device *spi) +{ + struct cs40l50 *cs40l50 = spi_get_drvdata(spi); + + cs40l50_remove(cs40l50); +} + +static const struct spi_device_id cs40l50_id_spi[] = { + { "cs40l50" }, + {} +}; +MODULE_DEVICE_TABLE(spi, cs40l50_id_spi); + +static const struct of_device_id cs40l50_of_match[] = { + { .compatible = "cirrus,cs40l50" }, + {} +}; +MODULE_DEVICE_TABLE(of, cs40l50_of_match); + +static struct spi_driver cs40l50_spi_driver = { + .driver = { + .name = "cs40l50", + .of_match_table = cs40l50_of_match, + .pm = pm_ptr(&cs40l50_pm_ops), + }, + .id_table = cs40l50_id_spi, + .probe = cs40l50_spi_probe, + .remove = cs40l50_spi_remove, +}; +module_spi_driver(cs40l50_spi_driver); + +MODULE_DESCRIPTION("CS40L50 SPI Driver"); +MODULE_AUTHOR("James Ogletree, Cirrus Logic Inc. "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/cs40l50.h b/include/linux/mfd/cs40l50.h new file mode 100644 index 000000000000..e5dc49860944 --- /dev/null +++ b/include/linux/mfd/cs40l50.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * CS40L50 Advanced Haptic Driver with waveform memory, + * integrated DSP, and closed-loop algorithms + * + * Copyright 2024 Cirrus Logic, Inc. + * + * Author: James Ogletree + */ + +#ifndef __MFD_CS40L50_H__ +#define __MFD_CS40L50_H__ + +#include +#include +#include +#include + +/* Power Supply Configuration */ +#define CS40L50_BLOCK_ENABLES2 0x201C +#define CS40L50_ERR_RLS 0x2034 +#define CS40L50_BST_LPMODE_SEL 0x3810 +#define CS40L50_DCM_LOW_POWER 0x1 +#define CS40L50_OVERTEMP_WARN 0x4000010 + +/* Interrupts */ +#define CS40L50_IRQ1_INT_1 0xE010 +#define CS40L50_IRQ1_BASE CS40L50_IRQ1_INT_1 +#define CS40L50_IRQ1_INT_2 0xE014 +#define CS40L50_IRQ1_INT_8 0xE02C +#define CS40L50_IRQ1_INT_9 0xE030 +#define CS40L50_IRQ1_INT_10 0xE034 +#define CS40L50_IRQ1_INT_18 0xE054 +#define CS40L50_IRQ1_MASK_1 0xE090 +#define CS40L50_IRQ1_MASK_2 0xE094 +#define CS40L50_IRQ1_MASK_20 0xE0DC +#define CS40L50_IRQ1_INT_1_OFFSET (CS40L50_IRQ1_INT_1 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ1_INT_2_OFFSET (CS40L50_IRQ1_INT_2 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ1_INT_8_OFFSET (CS40L50_IRQ1_INT_8 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ1_INT_9_OFFSET (CS40L50_IRQ1_INT_9 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ1_INT_10_OFFSET (CS40L50_IRQ1_INT_10 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ1_INT_18_OFFSET (CS40L50_IRQ1_INT_18 - CS40L50_IRQ1_BASE) +#define CS40L50_IRQ_MASK_2_OVERRIDE 0xFFDF7FFF +#define CS40L50_IRQ_MASK_20_OVERRIDE 0x15C01000 +#define CS40L50_AMP_SHORT_MASK BIT(31) +#define CS40L50_DSP_QUEUE_MASK BIT(21) +#define CS40L50_TEMP_ERR_MASK BIT(31) +#define CS40L50_BST_UVP_MASK BIT(6) +#define CS40L50_BST_SHORT_MASK BIT(7) +#define CS40L50_BST_ILIMIT_MASK BIT(18) +#define CS40L50_UVLO_VDDBATT_MASK BIT(16) +#define CS40L50_GLOBAL_ERROR_MASK BIT(15) + +enum cs40l50_irq_list { + CS40L50_DSP_QUEUE_IRQ, + CS40L50_GLOBAL_ERROR_IRQ, + CS40L50_UVLO_VDDBATT_IRQ, + CS40L50_BST_ILIMIT_IRQ, + CS40L50_BST_SHORT_IRQ, + CS40L50_BST_UVP_IRQ, + CS40L50_TEMP_ERR_IRQ, + CS40L50_AMP_SHORT_IRQ, +}; + +/* DSP */ +#define CS40L50_XMEM_PACKED_0 0x2000000 +#define CS40L50_XMEM_UNPACKED24_0 0x2800000 +#define CS40L50_SYS_INFO_ID 0x25E0000 +#define CS40L50_DSP_QUEUE_WT 0x28042C8 +#define CS40L50_DSP_QUEUE_RD 0x28042CC +#define CS40L50_NUM_WAVES 0x2805C18 +#define CS40L50_CORE_BASE 0x2B80000 +#define CS40L50_YMEM_PACKED_0 0x2C00000 +#define CS40L50_YMEM_UNPACKED24_0 0x3400000 +#define CS40L50_PMEM_0 0x3800000 +#define CS40L50_DSP_POLL_US 1000 +#define CS40L50_DSP_TIMEOUT_COUNT 100 +#define CS40L50_RESET_PULSE_US 2200 +#define CS40L50_CP_READY_US 3100 +#define CS40L50_AUTOSUSPEND_MS 2000 +#define CS40L50_PM_ALGO 0x9F206 +#define CS40L50_GLOBAL_ERR_RLS_SET BIT(11) +#define CS40L50_GLOBAL_ERR_RLS_CLEAR 0 + +enum cs40l50_wseqs { + CS40L50_PWR_ON, + CS40L50_STANDBY, + CS40L50_ACTIVE, + CS40L50_NUM_WSEQS, +}; + +/* DSP Queue */ +#define CS40L50_DSP_QUEUE_BASE 0x11004 +#define CS40L50_DSP_QUEUE_END 0x1101C +#define CS40L50_DSP_QUEUE 0x11020 +#define CS40L50_PREVENT_HIBER 0x2000003 +#define CS40L50_ALLOW_HIBER 0x2000004 +#define CS40L50_SHUTDOWN 0x2000005 +#define CS40L50_SYSTEM_RESET 0x2000007 +#define CS40L50_START_I2S 0x3000002 +#define CS40L50_OWT_PUSH 0x3000008 +#define CS40L50_STOP_PLAYBACK 0x5000000 +#define CS40L50_OWT_DELETE 0xD000000 + +/* Firmware files */ +#define CS40L50_FW "cs40l50.wmfw" +#define CS40L50_WT "cs40l50.bin" + +/* Device */ +#define CS40L50_DEVID 0x0 +#define CS40L50_REVID 0x4 +#define CS40L50_DEVID_A 0x40A50 +#define CS40L50_REVID_B0 0xB0 + +struct cs40l50 { + struct device *dev; + struct regmap *regmap; + struct mutex lock; + struct cs_dsp dsp; + struct gpio_desc *reset_gpio; + struct regmap_irq_chip_data *irq_data; + const struct firmware *fw; + const struct firmware *bin; + struct cs_dsp_wseq wseqs[CS40L50_NUM_WSEQS]; + int irq; + u32 devid; + u32 revid; +}; + +int cs40l50_dsp_write(struct device *dev, struct regmap *regmap, u32 val); +int cs40l50_probe(struct cs40l50 *cs40l50); +int cs40l50_remove(struct cs40l50 *cs40l50); + +extern const struct regmap_config cs40l50_regmap; +extern const struct dev_pm_ops cs40l50_pm_ops; + +#endif /* __MFD_CS40L50_H__ */