[PATCH v6 07/14] ASoC: Intel: catpt: Device driver lifecycle
Cezary Rojewski
cezary.rojewski at intel.com
Thu Sep 17 16:12:35 CEST 2020
Implement ACPI device probing and removal functions as well as handlers
for its PM capabilities. Device probing also takes care of enumerating
ADSP subsystem components.
Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---
sound/soc/intel/catpt/device.c | 345 +++++++++++++++++++++++++++++++++
1 file changed, 345 insertions(+)
create mode 100644 sound/soc/intel/catpt/device.c
diff --git a/sound/soc/intel/catpt/device.c b/sound/soc/intel/catpt/device.c
new file mode 100644
index 000000000000..617983412945
--- /dev/null
+++ b/sound/soc/intel/catpt/device.c
@@ -0,0 +1,345 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2020 Intel Corporation. All rights reserved.
+//
+// Author: Cezary Rojewski <cezary.rojewski at intel.com>
+//
+// Special thanks to:
+// Marcin Barlik <marcin.barlik at intel.com>
+// Piotr Papierkowski <piotr.papierkowski at intel.com>
+//
+// for sharing LPT-LP and WTP-LP AudioDSP architecture expertise and
+// helping backtrack its historical background
+//
+
+#include <linux/acpi.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include <sound/soc-acpi-intel-match.h>
+#include "core.h"
+#include "registers.h"
+
+static int __maybe_unused catpt_suspend(struct device *dev)
+{
+ struct catpt_dev *cdev = dev_get_drvdata(dev);
+ struct dma_chan *chan;
+ int ret;
+
+ chan = catpt_dma_request_config_chan(cdev);
+ if (IS_ERR(chan))
+ return PTR_ERR(chan);
+
+ memset(&cdev->dx_ctx, 0, sizeof(cdev->dx_ctx));
+ ret = catpt_ipc_enter_dxstate(cdev, CATPT_DX_STATE_D3, &cdev->dx_ctx);
+ if (ret) {
+ ret = CATPT_IPC_ERROR(ret);
+ goto exit;
+ }
+
+ ret = catpt_dsp_stall(cdev, true);
+ if (ret)
+ goto exit;
+
+ ret = catpt_store_memdumps(cdev, chan);
+ if (ret) {
+ dev_err(cdev->dev, "store memdumps failed: %d\n", ret);
+ goto exit;
+ }
+
+ ret = catpt_store_module_states(cdev, chan);
+ if (ret) {
+ dev_err(cdev->dev, "store module states failed: %d\n", ret);
+ goto exit;
+ }
+
+ ret = catpt_store_streams_context(cdev, chan);
+ if (ret) {
+ dev_err(cdev->dev, "store streams ctx failed: %d\n", ret);
+ goto exit;
+ }
+exit:
+ dma_release_channel(chan);
+ if (ret)
+ return ret;
+ return cdev->spec->power_down(cdev);
+}
+
+static int __maybe_unused catpt_resume(struct device *dev)
+{
+ struct catpt_dev *cdev = dev_get_drvdata(dev);
+ int ret, i;
+
+ ret = cdev->spec->power_up(cdev);
+ if (ret)
+ return ret;
+
+ if (!module_is_live(dev->driver->owner)) {
+ dev_info(dev, "module unloading, skipping fw boot\n");
+ return 0;
+ }
+
+ ret = catpt_boot_firmware(cdev, true);
+ if (ret) {
+ dev_err(cdev->dev, "boot firmware failed: %d\n", ret);
+ return ret;
+ }
+
+ /* reconfigure SSP devices after Dx transition */
+ for (i = 0; i < CATPT_SSP_COUNT; i++) {
+ if (cdev->devfmt[i].iface == UINT_MAX)
+ continue;
+
+ ret = catpt_ipc_set_device_format(cdev, &cdev->devfmt[i]);
+ if (ret)
+ return CATPT_IPC_ERROR(ret);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused catpt_runtime_suspend(struct device *dev)
+{
+ return catpt_suspend(dev);
+}
+
+static int __maybe_unused catpt_runtime_resume(struct device *dev)
+{
+ return catpt_resume(dev);
+}
+
+static const struct dev_pm_ops catpt_dev_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(catpt_suspend, catpt_resume)
+ SET_RUNTIME_PM_OPS(catpt_runtime_suspend, catpt_runtime_resume, NULL)
+};
+
+/* machine board owned by CATPT is removed with this hook */
+static void board_pdev_unregister(void *data)
+{
+ platform_device_unregister(data);
+}
+
+static int catpt_register_board(struct catpt_dev *cdev)
+{
+ const struct catpt_spec *spec = cdev->spec;
+ struct snd_soc_acpi_mach *mach;
+ struct platform_device *board;
+
+ mach = snd_soc_acpi_find_machine(spec->machines);
+ if (!mach) {
+ dev_info(cdev->dev, "no machines present\n");
+ return 0;
+ }
+
+ mach->mach_params.platform = "catpt-platform";
+ board = platform_device_register_data(NULL, mach->drv_name,
+ PLATFORM_DEVID_NONE,
+ (const void *)mach, sizeof(*mach));
+ if (IS_ERR(board)) {
+ dev_err(cdev->dev, "board register failed\n");
+ return PTR_ERR(board);
+ }
+
+ return devm_add_action_or_reset(cdev->dev, board_pdev_unregister,
+ board);
+}
+
+static int catpt_probe_components(struct catpt_dev *cdev)
+{
+ int ret;
+
+ ret = cdev->spec->power_up(cdev);
+ if (ret)
+ return ret;
+
+ ret = catpt_dmac_probe(cdev);
+ if (ret) {
+ dev_err(cdev->dev, "DMAC probe failed: %d\n", ret);
+ goto dmac_err;
+ }
+
+ ret = catpt_first_boot_firmware(cdev);
+ if (ret) {
+ dev_err(cdev->dev, "first fw boot failed: %d\n", ret);
+ goto boot_fw_err;
+ }
+
+ ret = catpt_register_plat_component(cdev);
+ if (ret) {
+ dev_err(cdev->dev, "register plat comp failed: %d\n", ret);
+ goto boot_fw_err;
+ }
+
+ ret = catpt_register_board(cdev);
+ if (ret) {
+ dev_err(cdev->dev, "register board failed: %d\n", ret);
+ goto board_err;
+ }
+
+ /* reflect actual ADSP state in pm_runtime */
+ pm_runtime_set_active(cdev->dev);
+
+ pm_runtime_set_autosuspend_delay(cdev->dev, 2000);
+ pm_runtime_use_autosuspend(cdev->dev);
+ pm_runtime_mark_last_busy(cdev->dev);
+ pm_runtime_enable(cdev->dev);
+ return 0;
+
+board_err:
+ snd_soc_unregister_component(cdev->dev);
+boot_fw_err:
+ catpt_dmac_remove(cdev);
+dmac_err:
+ cdev->spec->power_down(cdev);
+
+ return ret;
+}
+
+static void catpt_dev_init(struct catpt_dev *cdev, struct device *dev,
+ const struct catpt_spec *spec)
+{
+ cdev->dev = dev;
+ cdev->spec = spec;
+ init_completion(&cdev->fw_ready);
+ INIT_LIST_HEAD(&cdev->stream_list);
+ spin_lock_init(&cdev->list_lock);
+ mutex_init(&cdev->clk_mutex);
+
+ /*
+ * Mark both device formats as uninitialized. Once corresponding
+ * cpu_dai's pcm is created, proper values are assigned.
+ */
+ cdev->devfmt[CATPT_SSP_IFACE_0].iface = UINT_MAX;
+ cdev->devfmt[CATPT_SSP_IFACE_1].iface = UINT_MAX;
+
+ catpt_ipc_init(&cdev->ipc, dev);
+
+ catpt_sram_init(&cdev->dram, spec->host_dram_offset,
+ catpt_dram_size(cdev));
+ catpt_sram_init(&cdev->iram, spec->host_iram_offset,
+ catpt_iram_size(cdev));
+}
+
+static int catpt_acpi_probe(struct platform_device *pdev)
+{
+ const struct catpt_spec *spec;
+ struct catpt_dev *cdev;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int ret;
+
+ spec = device_get_match_data(dev);
+ if (!spec)
+ return -ENODEV;
+
+ cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
+ return -ENOMEM;
+
+ catpt_dev_init(cdev, dev, spec);
+
+ /* map DSP bar address */
+ cdev->lpe_ba = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(cdev->lpe_ba))
+ return PTR_ERR(cdev->lpe_ba);
+ cdev->lpe_base = res->start;
+
+ /* map PCI bar address */
+ cdev->pci_ba = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(cdev->pci_ba))
+ return PTR_ERR(cdev->pci_ba);
+
+ /* alloc buffer for storing DRAM context during dx transitions */
+ cdev->dxbuf_vaddr = dmam_alloc_coherent(dev, catpt_dram_size(cdev),
+ &cdev->dxbuf_paddr, GFP_KERNEL);
+ if (!cdev->dxbuf_vaddr)
+ return -ENOMEM;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+ cdev->irq = ret;
+
+ platform_set_drvdata(pdev, cdev);
+
+ ret = devm_request_threaded_irq(dev, cdev->irq, catpt_dsp_irq_handler,
+ catpt_dsp_irq_thread,
+ IRQF_SHARED, "AudioDSP", cdev);
+ if (ret)
+ return ret;
+
+ return catpt_probe_components(cdev);
+}
+
+static int catpt_acpi_remove(struct platform_device *pdev)
+{
+ struct catpt_dev *cdev = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(cdev->dev);
+
+ snd_soc_unregister_component(cdev->dev);
+ catpt_dmac_remove(cdev);
+ cdev->spec->power_down(cdev);
+
+ catpt_sram_free(&cdev->iram);
+ catpt_sram_free(&cdev->dram);
+
+ return 0;
+}
+
+static struct catpt_spec lpt_desc = {
+ .machines = snd_soc_acpi_intel_haswell_machines,
+ .core_id = 0x01,
+ .host_dram_offset = 0x000000,
+ .host_iram_offset = 0x080000,
+ .host_shim_offset = 0x0E7000,
+ .host_dma_offset = { 0x0F0000, 0x0F8000 },
+ .host_ssp_offset = { 0x0E8000, 0x0E9000 },
+ .dram_mask = LPT_VDRTCTL0_DSRAMPGE_MASK,
+ .iram_mask = LPT_VDRTCTL0_ISRAMPGE_MASK,
+ .pll_shutdown = lpt_dsp_pll_shutdown,
+ .power_up = lpt_dsp_power_up,
+ .power_down = lpt_dsp_power_down,
+};
+
+static struct catpt_spec wpt_desc = {
+ .machines = snd_soc_acpi_intel_broadwell_machines,
+ .core_id = 0x02,
+ .host_dram_offset = 0x000000,
+ .host_iram_offset = 0x0A0000,
+ .host_shim_offset = 0x0FB000,
+ .host_dma_offset = { 0x0FE000, 0x0FF000 },
+ .host_ssp_offset = { 0x0FC000, 0x0FD000 },
+ .dram_mask = WPT_VDRTCTL0_DSRAMPGE_MASK,
+ .iram_mask = WPT_VDRTCTL0_ISRAMPGE_MASK,
+ .pll_shutdown = wpt_dsp_pll_shutdown,
+ .power_up = wpt_dsp_power_up,
+ .power_down = wpt_dsp_power_down,
+};
+
+static const struct acpi_device_id catpt_ids[] = {
+ { "INT33C8", (unsigned long)&lpt_desc },
+ { "INT3438", (unsigned long)&wpt_desc },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, catpt_ids);
+
+static struct platform_driver catpt_acpi_driver = {
+ .probe = catpt_acpi_probe,
+ .remove = catpt_acpi_remove,
+ .driver = {
+ .name = "catpt_adsp",
+ .acpi_match_table = catpt_ids,
+ .pm = &catpt_dev_pm,
+ },
+};
+module_platform_driver(catpt_acpi_driver);
+
+MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski at intel.com>");
+MODULE_DESCRIPTION("Intel LPT/WPT AudioDSP driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
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