From: Vinod Koul <vinod.koul@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
ALSA <alsa-devel@alsa-project.org>, Mark <broonie@kernel.org>,
Takashi <tiwai@suse.de>,
Pierre <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>,
Shreyas NC <shreyas.nc@intel.com>,
patches.audio@intel.com, alan@linux.intel.com,
Charles Keepax <ckeepax@opensource.cirrus.com>,
Sagar Dharia <sdharia@codeaurora.org>,
srinivas.kandagatla@linaro.org, plai@codeaurora.org,
Sudheer Papothi <spapothi@codeaurora.org>
Subject: [PATCH 14/14] soundwire: intel: Add Intel init module
Date: Thu, 19 Oct 2017 08:33:30 +0530 [thread overview]
Message-ID: <1508382211-3154-15-git-send-email-vinod.koul@intel.com> (raw)
In-Reply-To: <1508382211-3154-1-git-send-email-vinod.koul@intel.com>
The SoundWire Master is implemented as part of Audio controller in
Intel platforms. Add a init module which creates SoundWire Master
platform devices based on the links supported in the hardware.
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
drivers/soundwire/Makefile | 3 +
drivers/soundwire/intel_init.c | 230 ++++++++++++++++++++++++++++++++++++
include/linux/soundwire/sdw_intel.h | 3 +
3 files changed, 236 insertions(+)
create mode 100644 drivers/soundwire/intel_init.c
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index 0813b2c74426..94272c965d6c 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -13,3 +13,6 @@ obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
#Intel driver
soundwire-intel-objs := intel.o
obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
+
+soundwire-intel-init-objs := intel_init.o
+obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel-init.o
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
new file mode 100644
index 000000000000..188cb2052842
--- /dev/null
+++ b/drivers/soundwire/intel_init.c
@@ -0,0 +1,230 @@
+/*
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015-17 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015-17 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * SDW Intel Init Routines
+ *
+ * Initializes and creates SDW devices based on ACPI and Hardware values
+ */
+
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/soundwire/sdw_intel.h>
+#include "intel.h"
+
+#define SDW_MAX_LINKS 4
+#define SDW_SHIM_LCAP 0x0
+#define SDW_SHIM_BASE 0x2C000
+#define SDW_ALH_BASE 0x2C800
+#define SDW_LINK_BASE 0x30000
+#define SDW_LINK_SIZE 0x10000
+
+struct sdw_link_data {
+ struct sdw_intel_link_res res;
+ struct platform_device *pdev;
+};
+
+struct sdw_intel_ctx {
+ int count;
+ struct sdw_link_data *links;
+};
+
+static int sdw_intel_cleanup_pdev(struct sdw_intel_ctx *ctx)
+{
+ struct sdw_link_data *link = ctx->links;
+ int i;
+
+ if (!link)
+ return 0;
+
+ for (i = 0; i < ctx->count; i++) {
+ if (link->pdev)
+ platform_device_unregister(link->pdev);
+ link++;
+ }
+
+ kfree(ctx->links);
+ ctx->links = NULL;
+
+ return 0;
+}
+
+static struct sdw_intel_ctx
+*sdw_intel_add_controller(struct sdw_intel_res *res)
+{
+ struct platform_device_info pdevinfo;
+ struct platform_device *pdev;
+ struct sdw_link_data *link;
+ struct sdw_intel_ctx *ctx;
+ struct acpi_device *adev;
+ int ret, i;
+ u8 count;
+ u32 caps;
+
+ if (acpi_bus_get_device(res->handle, &adev))
+ return NULL;
+
+ /* Found controller, find links supported */
+ count = 0;
+ ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
+ "mipi-sdw-master-count", &count, 1);
+
+ /* Don't fail on error, continue and use hw value */
+ if (ret) {
+ dev_err(&adev->dev,
+ "Failed to read mipi-sdw-master-count: %d\n", ret);
+ count = SDW_MAX_LINKS;
+ }
+
+ /* Check SNDWLCAP.LCOUNT */
+ caps = ioread32(res->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP);
+
+ /* Check HW supported vs property value and use min of two */
+ count = min_t(u8, caps, count);
+
+ /* Check count is within bounds */
+ if (count > SDW_MAX_LINKS) {
+ dev_err(&adev->dev, "Link count %d exceeds max %d\n",
+ count, SDW_MAX_LINKS);
+ return NULL;
+ }
+
+ dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
+
+ ctx->count = count;
+ ctx->links = kcalloc(ctx->count, sizeof(*ctx->links), GFP_KERNEL);
+ if (!ctx->links)
+ goto link_err;
+
+ link = ctx->links;
+
+ /* Create SDW Master devices */
+ for (i = 0; i < count; i++) {
+
+ link->res.irq = res->irq;
+ link->res.registers = res->mmio_base + SDW_LINK_BASE
+ + (SDW_LINK_SIZE * i);
+ link->res.shim = res->mmio_base + SDW_SHIM_BASE;
+ link->res.alh = res->mmio_base + SDW_ALH_BASE;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+
+ pdevinfo.parent = res->parent;
+ pdevinfo.name = "int-sdw";
+ pdevinfo.id = i;
+ pdevinfo.fwnode = acpi_fwnode_handle(adev);
+ pdevinfo.data = &link->res;
+ pdevinfo.size_data = sizeof(link->res);
+
+ pdev = platform_device_register_full(&pdevinfo);
+ if (IS_ERR(pdev)) {
+ dev_err(&adev->dev,
+ "platform device creation failed: %ld\n",
+ PTR_ERR(pdev));
+ goto pdev_err;
+ }
+
+ link->pdev = pdev;
+ link++;
+ }
+
+ return ctx;
+
+pdev_err:
+ sdw_intel_cleanup_pdev(ctx);
+link_err:
+ kfree(ctx);
+ return NULL;
+}
+
+static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
+ void *cdata, void **return_value)
+{
+ struct sdw_intel_res *res = cdata;
+ struct acpi_device *adev;
+
+ if (acpi_bus_get_device(handle, &adev)) {
+ dev_err(&adev->dev, "Couldn't find ACPI handle\n");
+ return AE_NOT_FOUND;
+ }
+
+ res->handle = handle;
+ return AE_OK;
+}
+
+void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res)
+{
+ acpi_status status;
+
+ status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
+ parent_handle, 1,
+ sdw_intel_acpi_cb,
+ NULL, res, NULL);
+ if (ACPI_FAILURE(status))
+ return NULL;
+
+ return sdw_intel_add_controller(res);
+}
+EXPORT_SYMBOL(sdw_intel_init);
+
+void sdw_intel_exit(void *arg)
+{
+ struct sdw_intel_ctx *ctx = arg;
+
+ sdw_intel_cleanup_pdev(ctx);
+ kfree(ctx);
+}
+EXPORT_SYMBOL(sdw_intel_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Intel Soundwire Init Library");
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index ef4a3b437877..af3563ac80ce 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -66,4 +66,7 @@ struct sdw_intel_res {
struct device *parent;
};
+void *sdw_intel_init(acpi_handle *parent_handle, struct sdw_intel_res *res);
+void sdw_intel_exit(void *arg);
+
#endif
--
2.7.4
prev parent reply other threads:[~2017-10-19 3:00 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 3:03 [PATCH 00/14] soundwire: Add a new SoundWire subsystem Vinod Koul
2017-10-19 3:03 ` [PATCH 01/14] Documentation: Add SoundWire summary Vinod Koul
2017-10-19 3:33 ` Randy Dunlap
2017-10-19 4:44 ` Vinod Koul
2017-10-20 10:39 ` Greg Kroah-Hartman
2017-10-20 15:49 ` Vinod Koul
2017-10-20 16:22 ` Greg Kroah-Hartman
2017-10-20 17:09 ` Vinod Koul
2017-10-21 8:57 ` Mark Brown
2017-10-21 11:28 ` Vinod Koul
2017-10-22 10:06 ` [alsa-devel] " Pierre-Louis Bossart
2017-10-23 8:21 ` Mark Brown
2017-10-23 7:50 ` Mark Brown
2017-10-23 11:18 ` [alsa-devel] " Vinod Koul
2017-10-19 3:03 ` [PATCH 02/14] soundwire: Add SoundWire bus type Vinod Koul
2017-10-19 7:40 ` Takashi Iwai
2017-10-19 8:32 ` [alsa-devel] " Takashi Iwai
2017-10-20 5:11 ` Vinod Koul
2017-10-20 6:59 ` Takashi Iwai
2017-10-20 15:46 ` Vinod Koul
2017-10-20 15:50 ` Takashi Iwai
2017-10-20 16:11 ` Vinod Koul
2017-10-20 10:41 ` Greg Kroah-Hartman
2017-10-20 15:52 ` Vinod Koul
2017-10-20 10:45 ` Greg Kroah-Hartman
2017-10-20 16:01 ` Vinod Koul
2017-10-20 16:21 ` Greg Kroah-Hartman
2017-10-20 17:10 ` Vinod Koul
2017-10-23 11:46 ` Alan Cox
2017-10-26 8:33 ` Vinod Koul
2017-10-27 8:57 ` Greg Kroah-Hartman
2017-10-30 13:11 ` Vinod Koul
2017-10-20 16:03 ` Philippe Ombredanne
2017-10-20 16:20 ` Vinod Koul
2017-10-20 16:27 ` Greg Kroah-Hartman
2017-10-20 17:13 ` Vinod Koul
2017-10-23 11:52 ` Alan Cox
2017-10-21 9:03 ` Mark Brown
2017-10-21 11:29 ` Vinod Koul
2017-11-09 21:14 ` Srinivas Kandagatla
2017-11-10 4:59 ` Vinod Koul
2017-11-10 8:55 ` Vinod Koul
2017-11-10 10:50 ` Srinivas Kandagatla
2017-11-10 10:42 ` Srinivas Kandagatla
2017-11-10 10:58 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 03/14] soundwire: Add Master registration Vinod Koul
2017-10-19 8:54 ` [alsa-devel] " Takashi Iwai
2017-10-20 5:19 ` Vinod Koul
2017-10-20 10:47 ` Greg Kroah-Hartman
2017-10-20 16:05 ` Vinod Koul
2017-10-21 9:12 ` Mark Brown
2017-10-21 11:35 ` Vinod Koul
2017-10-23 8:24 ` Mark Brown
2017-10-23 11:19 ` Vinod Koul
2017-11-09 21:14 ` Srinivas Kandagatla
2017-11-10 5:02 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 04/14] soundwire: Add MIPI DisCo property helpers Vinod Koul
2017-10-19 9:02 ` [alsa-devel] " Takashi Iwai
2017-10-20 5:25 ` Vinod Koul
2017-10-21 9:20 ` Mark Brown
2017-10-21 11:37 ` Vinod Koul
2017-10-22 10:14 ` [alsa-devel] " Pierre-Louis Bossart
2017-10-19 3:03 ` [PATCH 05/14] soundwire: Add SoundWire MIPI defined registers Vinod Koul
2017-10-19 3:03 ` [PATCH 06/14] soundwire: Add IO transfer Vinod Koul
2017-10-19 9:13 ` [alsa-devel] " Takashi Iwai
2017-10-20 5:30 ` Vinod Koul
2017-10-20 7:06 ` Takashi Iwai
2017-10-20 15:48 ` Vinod Koul
2017-10-21 9:29 ` Mark Brown
2017-10-21 11:40 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 07/14] regmap: Add SoundWire bus support Vinod Koul
2017-10-21 9:34 ` Mark Brown
2017-10-21 11:44 ` Vinod Koul
2017-10-23 11:56 ` Alan Cox
2017-10-23 13:16 ` Mark Brown
2017-10-19 3:03 ` [PATCH 08/14] soundwire: Add Slave status handling helpers Vinod Koul
2017-10-19 13:44 ` [alsa-devel] " Takashi Iwai
2017-10-31 13:04 ` Vinod Koul
2017-10-31 21:19 ` Pierre-Louis Bossart
2017-11-01 9:08 ` Vinod Koul
2017-11-01 21:10 ` Pierre-Louis Bossart
2017-11-02 3:28 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 09/14] soundwire: Add slave status handling Vinod Koul
2017-10-19 3:03 ` [PATCH 10/14] soundwire: Add sysfs for SoundWire DisCo properties Vinod Koul
2017-10-21 9:42 ` Mark Brown
2017-10-21 11:53 ` Vinod Koul
2017-11-09 21:14 ` Srinivas Kandagatla
2017-11-10 4:52 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 11/14] soundwire: cdns: Add cadence module Vinod Koul
2017-10-21 9:52 ` Mark Brown
2017-10-21 11:54 ` Vinod Koul
2017-10-19 3:03 ` [PATCH 12/14] soundwire: cdns: Add sdw_master_ops and IO transfer support Vinod Koul
2017-10-19 3:03 ` [PATCH 13/14] soundwire: intel: Add Intel Master driver Vinod Koul
2017-10-19 3:03 ` Vinod Koul [this message]
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