diff options
Diffstat (limited to 'sound/hda/hdac_device.c')
| -rw-r--r-- | sound/hda/hdac_device.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c new file mode 100644 index 000000000000..a3f52ad4de37 --- /dev/null +++ b/sound/hda/hdac_device.c @@ -0,0 +1,471 @@ +/* + * HD-audio codec core device + */ + +#include <linux/init.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/export.h> +#include <linux/pm_runtime.h> +#include <sound/hdaudio.h> +#include "local.h" + +static void setup_fg_nodes(struct hdac_device *codec); +static int get_codec_vendor_name(struct hdac_device *codec); + +static void default_release(struct device *dev) +{ + snd_hdac_device_exit(container_of(dev, struct hdac_device, dev)); +} + +/** + * snd_hdac_device_init - initialize the HD-audio codec base device + * @codec: device to initialize + * @bus: but to attach + * @name: device name string + * @addr: codec address + * + * Returns zero for success or a negative error code. + * + * This function increments the runtime PM counter and marks it active. + * The caller needs to turn it off appropriately later. + * + * The caller needs to set the device's release op properly by itself. + */ +int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, + const char *name, unsigned int addr) +{ + struct device *dev; + hda_nid_t fg; + int err; + + dev = &codec->dev; + device_initialize(dev); + dev->parent = bus->dev; + dev->bus = &snd_hda_bus_type; + dev->release = default_release; + dev_set_name(dev, "%s", name); + device_enable_async_suspend(dev); + + codec->bus = bus; + codec->addr = addr; + codec->type = HDA_DEV_CORE; + pm_runtime_set_active(&codec->dev); + pm_runtime_get_noresume(&codec->dev); + atomic_set(&codec->in_pm, 0); + + err = snd_hdac_bus_add_device(bus, codec); + if (err < 0) + goto error; + + /* fill parameters */ + codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, + AC_PAR_VENDOR_ID); + if (codec->vendor_id == -1) { + /* read again, hopefully the access method was corrected + * in the last read... + */ + codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, + AC_PAR_VENDOR_ID); + } + + codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, + AC_PAR_SUBSYSTEM_ID); + codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, + AC_PAR_REV_ID); + + setup_fg_nodes(codec); + if (!codec->afg && !codec->mfg) { + dev_err(dev, "no AFG or MFG node found\n"); + err = -ENODEV; + goto error; + } + + fg = codec->afg ? codec->afg : codec->mfg; + + err = snd_hdac_refresh_widgets(codec); + if (err < 0) + goto error; + + codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); + /* reread ssid if not set by parameter */ + if (codec->subsystem_id == -1) + snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, + &codec->subsystem_id); + + err = get_codec_vendor_name(codec); + if (err < 0) + goto error; + + codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", + codec->vendor_id & 0xffff); + if (!codec->chip_name) { + err = -ENOMEM; + goto error; + } + + return 0; + + error: + pm_runtime_put_noidle(&codec->dev); + put_device(&codec->dev); + return err; +} +EXPORT_SYMBOL_GPL(snd_hdac_device_init); + +/** + * snd_hdac_device_exit - clean up the HD-audio codec base device + * @codec: device to clean up + */ +void snd_hdac_device_exit(struct hdac_device *codec) +{ + /* pm_runtime_put_noidle(&codec->dev); */ + snd_hdac_bus_remove_device(codec->bus, codec); + kfree(codec->vendor_name); + kfree(codec->chip_name); +} +EXPORT_SYMBOL_GPL(snd_hdac_device_exit); + +/** + * snd_hdac_make_cmd - compose a 32bit command word to be sent to the + * HD-audio controller + * @codec: the codec object + * @nid: NID to encode + * @verb: verb to encode + * @parm: parameter to encode + * + * Return an encoded command verb or -1 for error. + */ +unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, + unsigned int verb, unsigned int parm) +{ + u32 val, addr; + + addr = codec->addr; + if ((addr & ~0xf) || (nid & ~0x7f) || + (verb & ~0xfff) || (parm & ~0xffff)) { + dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", + addr, nid, verb, parm); + return -1; + } + + val = addr << 28; + val |= (u32)nid << 20; + val |= verb << 8; + val |= parm; + return val; +} +EXPORT_SYMBOL_GPL(snd_hdac_make_cmd); + +/** + * snd_hdac_read - execute a verb + * @codec: the codec object + * @nid: NID to execute a verb + * @verb: verb to execute + * @parm: parameter for a verb + * @res: the pointer to store the result, NULL if running async + * + * Returns zero if successful, or a negative error code. + */ +int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, + unsigned int verb, unsigned int parm, unsigned int *res) +{ + unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); + + return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); +} +EXPORT_SYMBOL_GPL(snd_hdac_read); + +/** + * snd_hdac_read_parm - read a codec parameter + * @codec: the codec object + * @nid: NID to read a parameter + * @parm: parameter to read + * + * Returns -1 for error. If you need to distinguish the error more + * strictly, use snd_hdac_read() directly. + */ +int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm) +{ + int val; + + if (snd_hdac_read(codec, nid, AC_VERB_PARAMETERS, parm, &val)) + return -1; + return val; +} +EXPORT_SYMBOL_GPL(snd_hdac_read_parm); + +/** + * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes + * @codec: the codec object + * @nid: NID to inspect + * @start_id: the pointer to store the starting NID + * + * Returns the number of subtree nodes or zero if not found. + */ +int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, + hda_nid_t *start_id) +{ + unsigned int parm; + + parm = snd_hdac_read_parm(codec, nid, AC_PAR_NODE_COUNT); + if (parm == -1) { + *start_id = 0; + return 0; + } + *start_id = (parm >> 16) & 0x7fff; + return (int)(parm & 0x7fff); +} +EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); + +/* + * look for an AFG and MFG nodes + */ +static void setup_fg_nodes(struct hdac_device *codec) +{ + int i, total_nodes, function_id; + hda_nid_t nid; + + total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); + for (i = 0; i < total_nodes; i++, nid++) { + function_id = snd_hdac_read_parm(codec, nid, + AC_PAR_FUNCTION_TYPE); + switch (function_id & 0xff) { + case AC_GRP_AUDIO_FUNCTION: + codec->afg = nid; + codec->afg_function_id = function_id & 0xff; + codec->afg_unsol = (function_id >> 8) & 1; + break; + case AC_GRP_MODEM_FUNCTION: + codec->mfg = nid; + codec->mfg_function_id = function_id & 0xff; + codec->mfg_unsol = (function_id >> 8) & 1; + break; + default: + break; + } + } +} + +/** + * snd_hdac_refresh_widgets - Reset the widget start/end nodes + * @codec: the codec object + */ +int snd_hdac_refresh_widgets(struct hdac_device *codec) +{ + hda_nid_t start_nid; + int nums; + + nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); + if (!start_nid || nums <= 0 || nums >= 0xff) { + dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", + codec->afg); + return -EINVAL; + } + + codec->num_nodes = nums; + codec->start_nid = start_nid; + codec->end_nid = start_nid + nums; + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); + +/* return CONNLIST_LEN parameter of the given widget */ +static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) +{ + unsigned int wcaps = get_wcaps(codec, nid); + unsigned int parm; + + if (!(wcaps & AC_WCAP_CONN_LIST) && + get_wcaps_type(wcaps) != AC_WID_VOL_KNB) + return 0; + + parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); + if (parm == -1) + parm = 0; + return parm; +} + +/** + * snd_hdac_get_connections - get a widget connection list + * @codec: the codec object + * @nid: NID + * @conn_list: the array to store the results, can be NULL + * @max_conns: the max size of the given array + * + * Returns the number of connected widgets, zero for no connection, or a + * negative error code. When the number of elements don't fit with the + * given array size, it returns -ENOSPC. + * + * When @conn_list is NULL, it just checks the number of connections. + */ +int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, + hda_nid_t *conn_list, int max_conns) +{ + unsigned int parm; + int i, conn_len, conns, err; + unsigned int shift, num_elems, mask; + hda_nid_t prev_nid; + int null_count = 0; + + parm = get_num_conns(codec, nid); + if (!parm) + return 0; + + if (parm & AC_CLIST_LONG) { + /* long form */ + shift = 16; + num_elems = 2; + } else { + /* short form */ + shift = 8; + num_elems = 4; + } + conn_len = parm & AC_CLIST_LENGTH; + mask = (1 << (shift-1)) - 1; + + if (!conn_len) + return 0; /* no connection */ + + if (conn_len == 1) { + /* single connection */ + err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, + &parm); + if (err < 0) + return err; + if (conn_list) + conn_list[0] = parm & mask; + return 1; + } + + /* multi connection */ + conns = 0; + prev_nid = 0; + for (i = 0; i < conn_len; i++) { + int range_val; + hda_nid_t val, n; + + if (i % num_elems == 0) { + err = snd_hdac_read(codec, nid, + AC_VERB_GET_CONNECT_LIST, i, + &parm); + if (err < 0) + return -EIO; + } + range_val = !!(parm & (1 << (shift-1))); /* ranges */ + val = parm & mask; + if (val == 0 && null_count++) { /* no second chance */ + dev_dbg(&codec->dev, + "invalid CONNECT_LIST verb %x[%i]:%x\n", + nid, i, parm); + return 0; + } + parm >>= shift; + if (range_val) { + /* ranges between the previous and this one */ + if (!prev_nid || prev_nid >= val) { + dev_warn(&codec->dev, + "invalid dep_range_val %x:%x\n", + prev_nid, val); + continue; + } + for (n = prev_nid + 1; n <= val; n++) { + if (conn_list) { + if (conns >= max_conns) + return -ENOSPC; + conn_list[conns] = n; + } + conns++; + } + } else { + if (conn_list) { + if (conns >= max_conns) + return -ENOSPC; + conn_list[conns] = val; + } + conns++; + } + prev_nid = val; + } + return conns; +} +EXPORT_SYMBOL_GPL(snd_hdac_get_connections); + +#ifdef CONFIG_PM +/** + * snd_hdac_power_up - increment the runtime pm counter + * @codec: the codec object + */ +void snd_hdac_power_up(struct hdac_device *codec) +{ + struct device *dev = &codec->dev; + + if (atomic_read(&codec->in_pm)) + return; + pm_runtime_get_sync(dev); +} +EXPORT_SYMBOL_GPL(snd_hdac_power_up); + +/** + * snd_hdac_power_up - decrement the runtime pm counter + * @codec: the codec object + */ +void snd_hdac_power_down(struct hdac_device *codec) +{ + struct device *dev = &codec->dev; + + if (atomic_read(&codec->in_pm)) + return; + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); +} +EXPORT_SYMBOL_GPL(snd_hdac_power_down); +#endif + +/* codec vendor labels */ +struct hda_vendor_id { + unsigned int id; + const char *name; +}; + +static struct hda_vendor_id hda_vendor_ids[] = { + { 0x1002, "ATI" }, + { 0x1013, "Cirrus Logic" }, + { 0x1057, "Motorola" }, + { 0x1095, "Silicon Image" }, + { 0x10de, "Nvidia" }, + { 0x10ec, "Realtek" }, + { 0x1102, "Creative" }, + { 0x1106, "VIA" }, + { 0x111d, "IDT" }, + { 0x11c1, "LSI" }, + { 0x11d4, "Analog Devices" }, + { 0x13f6, "C-Media" }, + { 0x14f1, "Conexant" }, + { 0x17e8, "Chrontel" }, + { 0x1854, "LG" }, + { 0x1aec, "Wolfson Microelectronics" }, + { 0x1af4, "QEMU" }, + { 0x434d, "C-Media" }, + { 0x8086, "Intel" }, + { 0x8384, "SigmaTel" }, + {} /* terminator */ +}; + +/* store the codec vendor name */ +static int get_codec_vendor_name(struct hdac_device *codec) +{ + const struct hda_vendor_id *c; + u16 vendor_id = codec->vendor_id >> 16; + + for (c = hda_vendor_ids; c->id; c++) { + if (c->id == vendor_id) { + codec->vendor_name = kstrdup(c->name, GFP_KERNEL); + return codec->vendor_name ? 0 : -ENOMEM; + } + } + + codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); + return codec->vendor_name ? 0 : -ENOMEM; +} |