// SPDX-License-Identifier: GPL-2.0-only /* * hdac-ext-controller.c - HD-audio extended controller functions. * * Copyright (C) 2014-2015 Intel Corp * Author: Jeeja KP * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include #include /* * processing pipe helpers - these helpers are useful for dealing with HDA * new capability of processing pipelines */ /** * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability * @bus: the pointer to HDAC bus object * @enable: flag to turn on/off the capability */ void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable) { if (!bus->ppcap) { dev_err(bus->dev, "Address of PP capability is NULL"); return; } if (enable) snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, AZX_PPCTL_GPROCEN); else snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, 0); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable); /** * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable * @bus: the pointer to HDAC bus object * @enable: flag to enable/disable interrupt */ void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable) { if (!bus->ppcap) { dev_err(bus->dev, "Address of PP capability is NULL\n"); return; } if (enable) snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, AZX_PPCTL_PIE); else snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, 0); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable); /* * Multilink helpers - these helpers are useful for dealing with HDA * new multilink capability */ /** * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability * @bus: the pointer to HDAC bus object * * This will parse all links and read the mlink capabilities and add them * in hlink_list of extended hdac bus * Note: this will be freed on bus exit by driver */ int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_bus *bus) { int idx; u32 link_count; struct hdac_ext_link *hlink; link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1; dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count); for (idx = 0; idx < link_count; idx++) { hlink = kzalloc(sizeof(*hlink), GFP_KERNEL); if (!hlink) return -ENOMEM; hlink->index = idx; hlink->bus = bus; hlink->ml_addr = bus->mlcap + AZX_ML_BASE + (AZX_ML_INTERVAL * idx); hlink->lcaps = readl(hlink->ml_addr + AZX_REG_ML_LCAP); hlink->lsdiid = readw(hlink->ml_addr + AZX_REG_ML_LSDIID); /* since link in On, update the ref */ hlink->ref_count = 1; list_add_tail(&hlink->list, &bus->hlink_list); } return 0; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities); /** * snd_hdac_ext_link_free_all- free hdac extended link objects * * @bus: the pointer to HDAC bus object */ void snd_hdac_ext_link_free_all(struct hdac_bus *bus) { struct hdac_ext_link *hlink; while (!list_empty(&bus->hlink_list)) { hlink = list_first_entry(&bus->hlink_list, struct hdac_ext_link, list); list_del(&hlink->list); kfree(hlink); } } EXPORT_SYMBOL_GPL(snd_hdac_ext_link_free_all); /** * snd_hdac_ext_bus_get_hlink_by_addr - get hlink at specified address * @bus: hlink's parent bus device * @addr: codec device address * * Returns hlink object or NULL if matching hlink is not found. */ struct hdac_ext_link *snd_hdac_ext_bus_get_hlink_by_addr(struct hdac_bus *bus, int addr) { struct hdac_ext_link *hlink; list_for_each_entry(hlink, &bus->hlink_list, list) if (hlink->lsdiid & (0x1 << addr)) return hlink; return NULL; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_hlink_by_addr); /** * snd_hdac_ext_bus_get_hlink_by_name - get hlink based on codec name * @bus: the pointer to HDAC bus object * @codec_name: codec name */ struct hdac_ext_link *snd_hdac_ext_bus_get_hlink_by_name(struct hdac_bus *bus, const char *codec_name) { int bus_idx, addr; if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2) return NULL; if (bus->idx != bus_idx) return NULL; if (addr < 0 || addr > 31) return NULL; return snd_hdac_ext_bus_get_hlink_by_addr(bus, addr); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_hlink_by_name); static int check_hdac_link_power_active(struct hdac_ext_link *hlink, bool enable) { int timeout; u32 val; int mask = (1 << AZX_ML_LCTL_CPA_SHIFT); udelay(3); timeout = 150; do { val = readl(hlink->ml_addr + AZX_REG_ML_LCTL); if (enable) { if (((val & mask) >> AZX_ML_LCTL_CPA_SHIFT)) return 0; } else { if (!((val & mask) >> AZX_ML_LCTL_CPA_SHIFT)) return 0; } udelay(3); } while (--timeout); return -EIO; } /** * snd_hdac_ext_bus_link_power_up -power up hda link * @hlink: HD-audio extended link */ int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *hlink) { snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_ML_LCTL_SPA, AZX_ML_LCTL_SPA); return check_hdac_link_power_active(hlink, true); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up); /** * snd_hdac_ext_bus_link_power_down -power down hda link * @hlink: HD-audio extended link */ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *hlink) { snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_ML_LCTL_SPA, 0); return check_hdac_link_power_active(hlink, false); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); /** * snd_hdac_ext_bus_link_power_up_all -power up all hda link * @bus: the pointer to HDAC bus object */ int snd_hdac_ext_bus_link_power_up_all(struct hdac_bus *bus) { struct hdac_ext_link *hlink = NULL; int ret; list_for_each_entry(hlink, &bus->hlink_list, list) { ret = snd_hdac_ext_bus_link_power_up(hlink); if (ret < 0) return ret; } return 0; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all); /** * snd_hdac_ext_bus_link_power_down_all -power down all hda link * @bus: the pointer to HDAC bus object */ int snd_hdac_ext_bus_link_power_down_all(struct hdac_bus *bus) { struct hdac_ext_link *hlink = NULL; int ret; list_for_each_entry(hlink, &bus->hlink_list, list) { ret = snd_hdac_ext_bus_link_power_down(hlink); if (ret < 0) return ret; } return 0; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all); /** * snd_hdac_ext_bus_link_set_stream_id - maps stream id to link output * @link: HD-audio ext link to set up * @stream: stream id */ void snd_hdac_ext_bus_link_set_stream_id(struct hdac_ext_link *link, int stream) { snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_set_stream_id); /** * snd_hdac_ext_bus_link_clear_stream_id - maps stream id to link output * @link: HD-audio ext link to set up * @stream: stream id */ void snd_hdac_ext_bus_link_clear_stream_id(struct hdac_ext_link *link, int stream) { snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_clear_stream_id); int snd_hdac_ext_bus_link_get(struct hdac_bus *bus, struct hdac_ext_link *hlink) { unsigned long codec_mask; int ret = 0; mutex_lock(&bus->lock); /* * if we move from 0 to 1, count will be 1 so power up this link * as well, also check the dma status and trigger that */ if (++hlink->ref_count == 1) { if (!bus->cmd_dma_state) { snd_hdac_bus_init_cmd_io(bus); bus->cmd_dma_state = true; } ret = snd_hdac_ext_bus_link_power_up(hlink); /* * clear the register to invalidate all the output streams */ snd_hdac_updatew(hlink->ml_addr, AZX_REG_ML_LOSIDV, AZX_ML_LOSIDV_STREAM_MASK, 0); /* * wait for 521usec for codec to report status * HDA spec section 4.3 - Codec Discovery */ udelay(521); codec_mask = snd_hdac_chip_readw(bus, STATESTS); dev_dbg(bus->dev, "codec_mask = 0x%lx\n", codec_mask); snd_hdac_chip_writew(bus, STATESTS, codec_mask); if (!bus->codec_mask) bus->codec_mask = codec_mask; } mutex_unlock(&bus->lock); return ret; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_get); int snd_hdac_ext_bus_link_put(struct hdac_bus *bus, struct hdac_ext_link *hlink) { int ret = 0; struct hdac_ext_link *hlink_tmp; bool link_up = false; mutex_lock(&bus->lock); /* * if we move from 1 to 0, count will be 0 * so power down this link as well */ if (--hlink->ref_count == 0) { ret = snd_hdac_ext_bus_link_power_down(hlink); /* * now check if all links are off, if so turn off * cmd dma as well */ list_for_each_entry(hlink_tmp, &bus->hlink_list, list) { if (hlink_tmp->ref_count) { link_up = true; break; } } if (!link_up) { snd_hdac_bus_stop_cmd_io(bus); bus->cmd_dma_state = false; } } mutex_unlock(&bus->lock); return ret; } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_put); static void hdac_ext_codec_link_up(struct hdac_device *codec) { const char *devname = dev_name(&codec->dev); struct hdac_ext_link *hlink = snd_hdac_ext_bus_get_hlink_by_name(codec->bus, devname); if (hlink) snd_hdac_ext_bus_link_get(codec->bus, hlink); } static void hdac_ext_codec_link_down(struct hdac_device *codec) { const char *devname = dev_name(&codec->dev); struct hdac_ext_link *hlink = snd_hdac_ext_bus_get_hlink_by_name(codec->bus, devname); if (hlink) snd_hdac_ext_bus_link_put(codec->bus, hlink); } void snd_hdac_ext_bus_link_power(struct hdac_device *codec, bool enable) { struct hdac_bus *bus = codec->bus; bool oldstate = test_bit(codec->addr, &bus->codec_powered); if (enable == oldstate) return; snd_hdac_bus_link_power(codec, enable); if (enable) hdac_ext_codec_link_up(codec); else hdac_ext_codec_link_down(codec); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power);