diff options
Diffstat (limited to 'sound/x86/intel_hdmi_lpe_audio.c')
| -rw-r--r-- | sound/x86/intel_hdmi_lpe_audio.c | 665 |
1 files changed, 0 insertions, 665 deletions
diff --git a/sound/x86/intel_hdmi_lpe_audio.c b/sound/x86/intel_hdmi_lpe_audio.c deleted file mode 100644 index 3cb0f642575c..000000000000 --- a/sound/x86/intel_hdmi_lpe_audio.c +++ /dev/null @@ -1,665 +0,0 @@ -/* - * intel_hdmi_lpe_audio.c - Intel HDMI LPE audio driver for Atom platforms - * - * Copyright (C) 2016 Intel Corp - * Authors: - * Jerome Anand <jerome.anand@intel.com> - * Aravind Siddappaji <aravindx.siddappaji@intel.com> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * 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. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ - -#include <linux/platform_device.h> -#include <linux/irqreturn.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/initval.h> -#include <sound/control.h> -#include <sound/initval.h> -#include <drm/intel_lpe_audio.h> -#include "intel_hdmi_lpe_audio.h" -#include "intel_hdmi_audio.h" - -/* globals*/ -static struct platform_device *hlpe_pdev; -static int hlpe_state; -static union otm_hdmi_eld_t hlpe_eld; - -struct hdmi_lpe_audio_ctx { - int irq; - void __iomem *mmio_start; - had_event_call_back had_event_callbacks; - struct snd_intel_had_interface *had_interface; - void *had_pvt_data; - int tmds_clock_speed; - bool dp_output; - int link_rate; - unsigned int had_config_offset; - int hdmi_audio_interrupt_mask; - struct work_struct hdmi_audio_wq; -}; - -static void hdmi_set_eld(void *eld) -{ - int size; - - BUILD_BUG_ON(sizeof(hlpe_eld) > HDMI_MAX_ELD_BYTES); - - size = sizeof(hlpe_eld); - memcpy((void *)&hlpe_eld, eld, size); -} - -static int hdmi_get_eld(void *eld) -{ - u8 *eld_data = (u8 *)&hlpe_eld; - - memcpy(eld, (void *)&hlpe_eld, sizeof(hlpe_eld)); - - print_hex_dump_bytes("eld: ", DUMP_PREFIX_NONE, eld_data, - sizeof(hlpe_eld)); - return 0; -} - - -static struct hdmi_lpe_audio_ctx *get_hdmi_context(void) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - return ctx; -} - -/* - * return whether HDMI audio device is busy. - */ -bool mid_hdmi_audio_is_busy(void *ddev) -{ - struct hdmi_lpe_audio_ctx *ctx; - int hdmi_audio_busy = 0; - struct hdmi_audio_event hdmi_audio_event; - - dev_dbg(&hlpe_pdev->dev, "%s: Enter", __func__); - - ctx = platform_get_drvdata(hlpe_pdev); - - if (hlpe_state == hdmi_connector_status_disconnected) { - /* HDMI is not connected, assuming audio device is idle. */ - return false; - } - - if (ctx->had_interface) { - hdmi_audio_event.type = HAD_EVENT_QUERY_IS_AUDIO_BUSY; - hdmi_audio_busy = ctx->had_interface->query( - ctx->had_pvt_data, - hdmi_audio_event); - return hdmi_audio_busy != 0; - } - return false; -} - -/* - * return true if HDMI audio device is suspended/ disconnected - */ -bool mid_hdmi_audio_suspend(void *ddev) -{ - struct hdmi_lpe_audio_ctx *ctx; - struct hdmi_audio_event hdmi_audio_event; - int ret = 0; - - ctx = platform_get_drvdata(hlpe_pdev); - - if (hlpe_state == hdmi_connector_status_disconnected) { - /* HDMI is not connected, assuming audio device - * is suspended already. - */ - return true; - } - - dev_dbg(&hlpe_pdev->dev, "%s: hlpe_state %d", __func__, - hlpe_state); - - if (ctx->had_interface) { - hdmi_audio_event.type = 0; - ret = ctx->had_interface->suspend(ctx->had_pvt_data, - hdmi_audio_event); - return (ret == 0) ? true : false; - } - return true; -} - -void mid_hdmi_audio_resume(void *ddev) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - - if (hlpe_state == hdmi_connector_status_disconnected) { - /* HDMI is not connected, there is no need - * to resume audio device. - */ - return; - } - - dev_dbg(&hlpe_pdev->dev, "%s: hlpe_state %d", __func__, hlpe_state); - - if (ctx->had_interface) - ctx->had_interface->resume(ctx->had_pvt_data); -} - -void mid_hdmi_audio_signal_event(enum had_event_type event) -{ - struct hdmi_lpe_audio_ctx *ctx; - - dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__); - - ctx = platform_get_drvdata(hlpe_pdev); - - /* The handler is protected in the respective - * event handlers to avoid races - */ - if (ctx->had_event_callbacks) - (*ctx->had_event_callbacks)(event, - ctx->had_pvt_data); -} - -/** - * used to write into display controller HDMI audio registers. - */ -static int hdmi_audio_write(u32 reg, u32 val) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - - dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__, reg, val); - - if (ctx->dp_output) { - if ((reg == AUDIO_HDMI_CONFIG_A) || - (reg == AUDIO_HDMI_CONFIG_B) || - (reg == AUDIO_HDMI_CONFIG_C)) { - if (val & AUD_CONFIG_VALID_BIT) - val = val | AUD_CONFIG_DP_MODE | - AUD_CONFIG_BLOCK_BIT; - } - } - iowrite32(val, (ctx->mmio_start+reg)); - - return 0; -} - -/** - * used to get the register value read from - * display controller HDMI audio registers. - */ -static int hdmi_audio_read(u32 reg, u32 *val) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - *val = ioread32(ctx->mmio_start+reg); - dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__, reg, *val); - return 0; -} - -/** - * used to update the masked bits in display controller HDMI - * audio registers. - */ -static int hdmi_audio_rmw(u32 reg, u32 val, u32 mask) -{ - struct hdmi_lpe_audio_ctx *ctx; - u32 val_tmp = 0; - - ctx = platform_get_drvdata(hlpe_pdev); - - val_tmp = (val & mask) | - ((ioread32(ctx->mmio_start + reg)) & ~mask); - - if (ctx->dp_output) { - if ((reg == AUDIO_HDMI_CONFIG_A) || - (reg == AUDIO_HDMI_CONFIG_B) || - (reg == AUDIO_HDMI_CONFIG_C)) { - if (val_tmp & AUD_CONFIG_VALID_BIT) - val_tmp = val_tmp | AUD_CONFIG_DP_MODE | - AUD_CONFIG_BLOCK_BIT; - } - } - - iowrite32(val_tmp, (ctx->mmio_start+reg)); - dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__, - reg, val_tmp); - - return 0; -} - -/** - * used to return the HDMI audio capabilities. - * e.g. resolution, frame rate. - */ -static int hdmi_audio_get_caps(enum had_caps_list get_element, - void *capabilities) -{ - struct hdmi_lpe_audio_ctx *ctx; - int ret = 0; - - ctx = get_hdmi_context(); - - dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__); - - switch (get_element) { - case HAD_GET_ELD: - ret = hdmi_get_eld(capabilities); - break; - case HAD_GET_DISPLAY_RATE: - /* ToDo: Verify if sampling freq logic is correct */ - *(u32 *)capabilities = ctx->tmds_clock_speed; - dev_dbg(&hlpe_pdev->dev, "%s: tmds_clock_speed = 0x%x\n", - __func__, ctx->tmds_clock_speed); - break; - case HAD_GET_LINK_RATE: - /* ToDo: Verify if sampling freq logic is correct */ - *(u32 *)capabilities = ctx->link_rate; - dev_dbg(&hlpe_pdev->dev, "%s: link rate = 0x%x\n", - __func__, ctx->link_rate); - break; - case HAD_GET_DP_OUTPUT: - *(u32 *)capabilities = ctx->dp_output; - dev_dbg(&hlpe_pdev->dev, "%s: dp_output = %d\n", - __func__, ctx->dp_output); - break; - default: - break; - } - - return ret; -} - -/** - * used to get the current hdmi base address - */ -int hdmi_audio_get_register_base(u32 **reg_base, - u32 *config_offset) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - *reg_base = (u32 *)(ctx->mmio_start); - *config_offset = ctx->had_config_offset; - dev_dbg(&hlpe_pdev->dev, "%s: reg_base = 0x%p, cfg_off = 0x%x\n", - __func__, *reg_base, *config_offset); - return 0; -} - -/** - * used to set the HDMI audio capabilities. - * e.g. Audio INT. - */ -int hdmi_audio_set_caps(enum had_caps_list set_element, - void *capabilties) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - - dev_dbg(&hlpe_pdev->dev, "%s: cap_id = 0x%x\n", __func__, set_element); - - switch (set_element) { - case HAD_SET_ENABLE_AUDIO_INT: - { - u32 status_reg; - - hdmi_audio_read(AUD_HDMI_STATUS_v2 + - ctx->had_config_offset, &status_reg); - status_reg |= - HDMI_AUDIO_BUFFER_DONE | HDMI_AUDIO_UNDERRUN; - hdmi_audio_write(AUD_HDMI_STATUS_v2 + - ctx->had_config_offset, status_reg); - hdmi_audio_read(AUD_HDMI_STATUS_v2 + - ctx->had_config_offset, &status_reg); - - } - break; - default: - break; - } - - return 0; -} - -static struct hdmi_audio_registers_ops hdmi_audio_reg_ops = { - .hdmi_audio_get_register_base = hdmi_audio_get_register_base, - .hdmi_audio_read_register = hdmi_audio_read, - .hdmi_audio_write_register = hdmi_audio_write, - .hdmi_audio_read_modify = hdmi_audio_rmw, -}; - -static struct hdmi_audio_query_set_ops hdmi_audio_get_set_ops = { - .hdmi_audio_get_caps = hdmi_audio_get_caps, - .hdmi_audio_set_caps = hdmi_audio_set_caps, -}; - -int mid_hdmi_audio_setup( - had_event_call_back audio_callbacks, - struct hdmi_audio_registers_ops *reg_ops, - struct hdmi_audio_query_set_ops *query_ops) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - - dev_dbg(&hlpe_pdev->dev, "%s: called\n", __func__); - - reg_ops->hdmi_audio_get_register_base = - (hdmi_audio_reg_ops.hdmi_audio_get_register_base); - reg_ops->hdmi_audio_read_register = - (hdmi_audio_reg_ops.hdmi_audio_read_register); - reg_ops->hdmi_audio_write_register = - (hdmi_audio_reg_ops.hdmi_audio_write_register); - reg_ops->hdmi_audio_read_modify = - (hdmi_audio_reg_ops.hdmi_audio_read_modify); - query_ops->hdmi_audio_get_caps = - hdmi_audio_get_set_ops.hdmi_audio_get_caps; - query_ops->hdmi_audio_set_caps = - hdmi_audio_get_set_ops.hdmi_audio_set_caps; - - ctx->had_event_callbacks = audio_callbacks; - - return 0; -} - -static void _had_wq(struct work_struct *work) -{ - mid_hdmi_audio_signal_event(HAD_EVENT_HOT_PLUG); -} - -int mid_hdmi_audio_register(struct snd_intel_had_interface *driver, - void *had_data) -{ - struct hdmi_lpe_audio_ctx *ctx; - - ctx = platform_get_drvdata(hlpe_pdev); - - dev_dbg(&hlpe_pdev->dev, "%s: called\n", __func__); - - ctx->had_pvt_data = had_data; - ctx->had_interface = driver; - - /* The Audio driver is loading now and we need to notify - * it if there is an HDMI device attached - */ - INIT_WORK(&ctx->hdmi_audio_wq, _had_wq); - dev_dbg(&hlpe_pdev->dev, "%s: Scheduling HDMI audio work queue\n", - __func__); - schedule_work(&ctx->hdmi_audio_wq); - - return 0; -} - -static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id) -{ - u32 audio_stat, audio_reg; - - struct hdmi_lpe_audio_ctx *ctx; - - dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__); - - ctx = platform_get_drvdata(hlpe_pdev); - - audio_reg = ctx->had_config_offset + AUD_HDMI_STATUS_v2; - hdmi_audio_read(audio_reg, &audio_stat); - - if (audio_stat & HDMI_AUDIO_UNDERRUN) { - hdmi_audio_write(audio_reg, HDMI_AUDIO_UNDERRUN); - mid_hdmi_audio_signal_event( - HAD_EVENT_AUDIO_BUFFER_UNDERRUN); - } - - if (audio_stat & HDMI_AUDIO_BUFFER_DONE) { - hdmi_audio_write(audio_reg, HDMI_AUDIO_BUFFER_DONE); - mid_hdmi_audio_signal_event( - HAD_EVENT_AUDIO_BUFFER_DONE); - } - - return IRQ_HANDLED; -} - -static void notify_audio_lpe(struct platform_device *pdev) -{ - struct hdmi_lpe_audio_ctx *ctx = platform_get_drvdata(pdev); - struct intel_hdmi_lpe_audio_pdata *pdata = pdev->dev.platform_data; - - if (pdata->hdmi_connected != true) { - - dev_dbg(&pdev->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG\n", - __func__); - - if (hlpe_state == hdmi_connector_status_connected) { - - hlpe_state = - hdmi_connector_status_disconnected; - - mid_hdmi_audio_signal_event( - HAD_EVENT_HOT_UNPLUG); - } else - dev_dbg(&pdev->dev, "%s: Already Unplugged!\n", - __func__); - - } else { - struct intel_hdmi_lpe_audio_eld *eld = &pdata->eld; - - switch (eld->pipe_id) { - case 0: - ctx->had_config_offset = AUDIO_HDMI_CONFIG_A; - break; - case 1: - ctx->had_config_offset = AUDIO_HDMI_CONFIG_B; - break; - case 2: - ctx->had_config_offset = AUDIO_HDMI_CONFIG_C; - break; - default: - dev_dbg(&pdev->dev, "Invalid pipe %d\n", - eld->pipe_id); - break; - } - - hdmi_set_eld(eld->eld_data); - - mid_hdmi_audio_signal_event(HAD_EVENT_HOT_PLUG); - - hlpe_state = hdmi_connector_status_connected; - - dev_dbg(&pdev->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n", - __func__, eld->port_id, pdata->tmds_clock_speed); - - if (pdata->tmds_clock_speed) { - ctx->tmds_clock_speed = pdata->tmds_clock_speed; - ctx->dp_output = pdata->dp_output; - ctx->link_rate = pdata->link_rate; - mid_hdmi_audio_signal_event(HAD_EVENT_MODE_CHANGING); - } - } -} - -/** - * hdmi_lpe_audio_probe - start bridge with i915 - * - * This function is called when the i915 driver creates the - * hdmi-lpe-audio platform device. Card creation is deferred until a - * hot plug event is received - */ -static int hdmi_lpe_audio_probe(struct platform_device *pdev) -{ - struct hdmi_lpe_audio_ctx *ctx; - struct intel_hdmi_lpe_audio_pdata *pdata; - int irq; - struct resource *res_mmio; - void __iomem *mmio_start; - int ret = 0; - unsigned long flag_irq; - static const struct pci_device_id cherryview_ids[] = { - {PCI_DEVICE(0x8086, 0x22b0)}, - {PCI_DEVICE(0x8086, 0x22b1)}, - {PCI_DEVICE(0x8086, 0x22b2)}, - {PCI_DEVICE(0x8086, 0x22b3)}, - {} - }; - - dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__); - - /*TBD:remove globals*/ - hlpe_pdev = pdev; - hlpe_state = hdmi_connector_status_disconnected; - - /* get resources */ - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_err(&hlpe_pdev->dev, "Could not get irq resource\n"); - return -ENODEV; - } - - res_mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res_mmio) { - dev_err(&hlpe_pdev->dev, "Could not get IO_MEM resources\n"); - return -ENXIO; - } - - dev_dbg(&hlpe_pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n", - __func__, (unsigned int)res_mmio->start, - (unsigned int)res_mmio->end); - - mmio_start = ioremap_nocache(res_mmio->start, - (size_t)(resource_size(res_mmio))); - if (!mmio_start) { - dev_err(&hlpe_pdev->dev, "Could not get ioremap\n"); - return -EACCES; - } - - /* setup interrupt handler */ - ret = request_irq(irq, display_pipe_interrupt_handler, - 0, - pdev->name, - NULL); - if (ret < 0) { - dev_err(&hlpe_pdev->dev, "request_irq failed\n"); - iounmap(mmio_start); - return -ENODEV; - } - - /* alloc and save context */ - ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); - if (ctx == NULL) { - free_irq(irq, NULL); - iounmap(mmio_start); - return -ENOMEM; - } - - ctx->irq = irq; - dev_dbg(&hlpe_pdev->dev, "hdmi lpe audio: irq num = %d\n", irq); - ctx->mmio_start = mmio_start; - ctx->tmds_clock_speed = DIS_SAMPLE_RATE_148_5; - - if (pci_dev_present(cherryview_ids)) - dev_dbg(&hlpe_pdev->dev, "%s: Cherrytrail LPE - Detected\n", - __func__); - else - dev_dbg(&hlpe_pdev->dev, "%s: Baytrail LPE - Assume\n", - __func__); - - /* assume pipe A as default */ - ctx->had_config_offset = AUDIO_HDMI_CONFIG_A; - - pdata = pdev->dev.platform_data; - - if (pdata == NULL) { - dev_err(&hlpe_pdev->dev, "%s: quit: pdata not allocated by i915!!\n", __func__); - kfree(ctx); - free_irq(irq, NULL); - iounmap(mmio_start); - return -ENOMEM; - } - - platform_set_drvdata(pdev, ctx); - - ret = hdmi_audio_probe((void *)pdev); - dev_dbg(&hlpe_pdev->dev, "hdmi lpe audio: setting pin eld notify callback\n"); - - spin_lock_irqsave(&pdata->lpe_audio_slock, flag_irq); - pdata->notify_audio_lpe = notify_audio_lpe; - if (pdata->notify_pending) { - - dev_dbg(&hlpe_pdev->dev, "%s: handle pending notification\n", __func__); - notify_audio_lpe(pdev); - pdata->notify_pending = false; - } - spin_unlock_irqrestore(&pdata->lpe_audio_slock, flag_irq); - - return ret; -} - -/** - * hdmi_lpe_audio_remove - stop bridge with i915 - * - * This function is called when the platform device is destroyed. The sound - * card should have been removed on hot plug event. - */ -static int hdmi_lpe_audio_remove(struct platform_device *pdev) -{ - struct hdmi_lpe_audio_ctx *ctx; - - dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__); - - hdmi_audio_remove(pdev); - - /* get context, release resources */ - ctx = platform_get_drvdata(pdev); - iounmap(ctx->mmio_start); - free_irq(ctx->irq, NULL); - kfree(ctx); - return 0; -} - -static int hdmi_lpe_audio_suspend(struct platform_device *pt_dev, - pm_message_t state) -{ - dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__); - mid_hdmi_audio_suspend(NULL); - return 0; -} - -static int hdmi_lpe_audio_resume(struct platform_device *pt_dev) -{ - dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__); - mid_hdmi_audio_resume(NULL); - return 0; -} - -static struct platform_driver hdmi_lpe_audio_driver = { - .driver = { - .name = "hdmi-lpe-audio", - }, - .probe = hdmi_lpe_audio_probe, - .remove = hdmi_lpe_audio_remove, - .suspend = hdmi_lpe_audio_suspend, - .resume = hdmi_lpe_audio_resume -}; - -module_platform_driver(hdmi_lpe_audio_driver); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:hdmi_lpe_audio"); |