[J-u-boot.git] / drivers / sound / hda_codec.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Implementation of per-board codec beeping
 * Copyright (c) 2011 The Chromium OS Authors.
 * Copyright 2018 Google LLC
 */

#define LOG_CATEGORY	UCLASS_SOUND

#include <common.h>
#include <dm.h>
#include <hda_codec.h>
#include <log.h>
#include <pci.h>
#include <sound.h>
#include <asm/io.h>
#include <dt-bindings/sound/azalia.h>

/**
 * struct hda_regs - HDA registers
 *
 * https://wiki.osdev.org/Intel_High_Definition_Audio
 * https://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html
 */
struct hda_regs {
	u16 gcap;
	u8 vmin;
	u8 vmaj;
	u16 outpay;
	u16 inpay;
	u32 gctl;
	u16 wakeen;
	u16 statests;
	u8 reserved[0x50];
	u32 cmd;		/* 0x60 */
	u32 resp;
	u32 icii;
};

enum {
	HDA_ICII_BUSY			= BIT(0),
	HDA_ICII_VALID			= BIT(1),

	/* Common node IDs */
	HDA_ROOT_NODE			= 0x00,

	/* HDA verbs fields */
	HDA_VERB_NID_S			= 20,
	HDA_VERB_VERB_S			= 8,
	HDA_VERB_PARAM_S		= 0,

	HDA_VERB_GET_PARAMS		= 0xf00,
	HDA_VERB_SET_BEEP		= 0x70a,

	/* GET_PARAMS parameter IDs */
	GET_PARAMS_NODE_COUNT		= 0x04,
	GET_PARAMS_AUDIO_GROUP_CAPS	= 0x08,
	GET_PARAMS_AUDIO_WIDGET_CAPS	= 0x09,

	/* Sub-node fields */
	NUM_SUB_NODES_S			= 0,
	NUM_SUB_NODES_M			= 0xff << NUM_SUB_NODES_S,
	FIRST_SUB_NODE_S		= 16,
	FIRST_SUB_NODE_M		= 0xff << FIRST_SUB_NODE_S,

	/* Get Audio Function Group Capabilities fields */
	AUDIO_GROUP_CAPS_BEEP_GEN	= 0x10000,

	/* Get Audio Widget Capabilities fields */
	AUDIO_WIDGET_TYPE_BEEP		= 0x7,
	AUDIO_WIDGET_TYPE_S		= 20,
	AUDIO_WIDGET_TYPE_M		= 0xf << AUDIO_WIDGET_TYPE_S,

	BEEP_FREQ_BASE			= 12000,
};

static inline uint hda_verb(uint nid, uint verb, uint param)
{
	return nid << HDA_VERB_NID_S | verb << HDA_VERB_VERB_S |
		param << HDA_VERB_PARAM_S;
}

int hda_wait_for_ready(struct hda_regs *regs)
{
	int timeout = 1000;	/* Use a 1msec timeout */

	while (timeout--) {
		u32 reg32 = readl(&regs->icii);

		if (!(reg32 & HDA_ICII_BUSY))
			return 0;
		udelay(1);
	}

	return -ETIMEDOUT;
}

static int wait_for_response(struct hda_regs *regs, uint *response)
{
	int timeout = 1000;
	u32 reg32;

	/* Send the verb to the codec */
	setbits_le32(&regs->icii, HDA_ICII_BUSY | HDA_ICII_VALID);

	/* Use a 1msec timeout */
	while (timeout--) {
		reg32 = readl(&regs->icii);
		if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) ==
			HDA_ICII_VALID) {
			if (response)
				*response = readl(&regs->resp);
			return 0;
		}
		udelay(1);
	}

	return -ETIMEDOUT;
}

int hda_wait_for_valid(struct hda_regs *regs)
{
	return wait_for_response(regs, NULL);
}

static int set_bits(void *port, u32 mask, u32 val)
{
	u32 reg32;
	int count;

	/* Write (val & mask) to port */
	clrsetbits_le32(port, mask, val);

	/* Wait for readback of register to match what was just written to it */
	count = 50;
	do {
		/* Wait 1ms based on BKDG wait time */
		mdelay(1);
		reg32 = readl(port) & mask;
	} while (reg32 != val && --count);

	/* Timeout occurred */
	if (!count)
		return -ETIMEDOUT;

	return 0;
}

int hda_codec_detect(struct hda_regs *regs)
{
	uint reg8;

	/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
	if (set_bits(&regs->gctl, 1, 1))
		goto no_codec;

	/* Write back the value once reset bit is set */
	writew(readw(&regs->gcap), &regs->gcap);

	/* Read in Codec location */
	reg8 = readb(&regs->statests) & 0xf;
	if (!reg8)
		goto no_codec;

	return reg8;

no_codec:
	/* Codec Not found - put HDA back in reset */
	set_bits(&regs->gctl, 1, 0);
	log_debug("No codec\n");

	return 0;
}

static int find_verb_data(struct udevice *dev, uint id, ofnode *nodep)
{
	ofnode parent = dev_read_subnode(dev, "codecs");
	ofnode node;
	u32 vendor_id, device_id;

	ofnode_for_each_subnode(node, parent) {
		if (ofnode_read_u32(node, "vendor-id", &vendor_id) ||
		    ofnode_read_u32(node, "device-id", &device_id)) {
			log_debug("Cannot get IDs for '%s'\n",
				  ofnode_get_name(node));
			return -EINVAL;
		}
		if (id != (vendor_id << 16 | device_id)) {
			log_debug("Skip codec node '%s' for %08x\n",
				  ofnode_get_name(node), id);
			continue;
		}

		log_debug("Found codec node '%s' for %08x\n",
			  ofnode_get_name(node), id);
		*nodep = node;
		return 0;
	}

	return -ENOENT;
}

static int send_verbs(ofnode node, const char *prop_name, struct hda_regs *regs)
{
	int ret, verb_size, i;
	const u32 *verb;

	verb = ofnode_get_property(node, prop_name, &verb_size);
	if (verb_size < 0) {
		log_debug("No verb data\n");
		return -EINVAL;
	}
	log_debug("verb_size: %d\n", verb_size);

	for (i = 0; i < verb_size / sizeof(*verb); i++) {
		ret = hda_wait_for_ready(regs);
		if (ret) {
			log_debug("  codec ready timeout\n");
			return ret;
		}

		writel(fdt32_to_cpu(verb[i]), &regs->cmd);

		ret = hda_wait_for_valid(regs);
		if (ret) {
			log_debug("  codec valid timeout\n");
			return ret;
		}
	}

	return 0;
}

static int codec_init(struct udevice *dev, struct hda_regs *regs, uint addr)
{
	ofnode node;
	uint id;
	int ret;

	log_debug("Initializing codec #%d\n", addr);
	ret = hda_wait_for_ready(regs);
	if (ret) {
		log_debug("  codec not ready\n");
		return ret;
	}

	/* Read the codec's vendor ID */
	writel(addr << AZALIA_CODEC_SHIFT |
	       AZALIA_OPCODE_READ_PARAM << AZALIA_VERB_SHIFT |
	       AZALIA_PARAM_VENDOR_ID, &regs->cmd);
	ret = hda_wait_for_valid(regs);
	if (ret) {
		log_debug("  codec not valid\n");
		return ret;
	}

	id = readl(&regs->resp);
	log_debug("codec vid/did: %08x\n", id);
	ret = find_verb_data(dev, id, &node);
	if (ret) {
		log_debug("No verb (err=%d)\n", ret);
		return ret;
	}
	ret = send_verbs(node, "verbs", regs);
	if (ret) {
		log_debug("failed to send verbs (err=%d)\n", ret);
		return ret;
	}
	log_debug("verb loaded\n");

	return 0;
}

int hda_codecs_init(struct udevice *dev, struct hda_regs *regs, u32 codec_mask)
{
	int ret;
	int i;

	for (i = 3; i >= 0; i--) {
		if (codec_mask & (1 << i)) {
			ret = codec_init(dev, regs, i);
			if (ret)
				return ret;
		}
	}

	ret = send_verbs(dev_ofnode(dev), "beep-verbs", regs);
	if (ret) {
		log_debug("failed to send beep verbs (err=%d)\n", ret);
		return ret;
	}
	log_debug("beep verbs loaded\n");

	return 0;
}

/**
 * exec_verb() - Write a verb to the codec
 *
 * @regs: HDA registers
 * @val: Command to write
 * @response: Set to response from codec
 * @return 0 if OK, -ve on error
 */
static int exec_verb(struct hda_regs *regs, uint val, uint *response)
{
	int ret;

	ret = hda_wait_for_ready(regs);
	if (ret)
		return ret;

	writel(val, &regs->cmd);

	return wait_for_response(regs, response);
}

/**
 * get_subnode_info() - Get subnode information
 *
 * @regs: HDA registers
 * @nid: Parent node ID to check
 * @num_sub_nodesp: Returns number of subnodes
 * @start_sub_node_nidp: Returns start subnode number
 * @return 0 if OK, -ve on error
 */
static int get_subnode_info(struct hda_regs *regs, uint nid,
			    uint *num_sub_nodesp, uint *start_sub_node_nidp)
{
	uint response;
	int ret;

	ret = exec_verb(regs, hda_verb(nid, HDA_VERB_GET_PARAMS,
				       GET_PARAMS_NODE_COUNT),
			&response);
	if (ret < 0) {
		printf("Audio: Error reading sub-node info %d\n", nid);
		return ret;
	}

	*num_sub_nodesp = (response & NUM_SUB_NODES_M) >> NUM_SUB_NODES_S;
	*start_sub_node_nidp = (response & FIRST_SUB_NODE_M) >>
			 FIRST_SUB_NODE_S;

	return 0;
}

/**
 * find_beep_node_in_group() - Finds the beeping node
 *
 * Searches the audio group for a node that supports beeping
 *
 * @regs: HDA registers
 * @group_nid: Group node ID to check
 * @return 0 if OK, -ve on error
 */
static uint find_beep_node_in_group(struct hda_regs *regs, uint group_nid)
{
	uint node_count = 0;
	uint current_nid = 0;
	uint response;
	uint end_nid;
	int ret;

	ret = get_subnode_info(regs, group_nid, &node_count, &current_nid);
	if (ret < 0)
		return 0;

	end_nid = current_nid + node_count;
	while (current_nid < end_nid) {
		ret = exec_verb(regs,
				hda_verb(current_nid, HDA_VERB_GET_PARAMS,
					 GET_PARAMS_AUDIO_WIDGET_CAPS),
				&response);
		if (ret < 0) {
			printf("Audio: Error reading widget caps\n");
			return 0;
		}

		if ((response & AUDIO_WIDGET_TYPE_M) >> AUDIO_WIDGET_TYPE_S ==
		    AUDIO_WIDGET_TYPE_BEEP)
			return current_nid;

		current_nid++;
	}

	return 0; /* no beep node found */
}

/**
 * audio_group_has_beep_node() - Check if group has a beep node
 *
 * Checks if the given audio group contains a beep generator
 * @regs: HDA registers
 * @nid: Node ID to check
 * @return 0 if OK, -ve on error
 */
static int audio_group_has_beep_node(struct hda_regs *regs, uint nid)
{
	uint response;
	int ret;

	ret = exec_verb(regs, hda_verb(nid, HDA_VERB_GET_PARAMS,
				       GET_PARAMS_AUDIO_GROUP_CAPS),
			&response);
	if (ret < 0) {
		printf("Audio: Error reading audio group caps %d\n", nid);
		return 0;
	}

	return !!(response & AUDIO_GROUP_CAPS_BEEP_GEN);
}

/**
 * get_hda_beep_nid() - Finds the node ID of the beep node
 *
 * Finds the nid of the beep node if it exists. Starts at the root node, for
 * each sub-node checks if the group contains a beep node.  If the group
 * contains a beep node, polls each node in the group until it is found.
 *
 * If the device has a intel,beep-nid property, the value of that is used
 * instead.
 *
 * @dev: Sound device
 * @return Node ID >0 if found, -ve error code otherwise
 */
static int get_hda_beep_nid(struct udevice *dev)
{
	struct hda_codec_priv *priv = dev_get_priv(dev);
	uint current_nid = 0;
	uint node_count = 0;
	uint end_nid;
	int ret;

	/* If the field exists, use the beep nid set in the fdt */
	ret = dev_read_u32(dev, "intel,beep-nid", &current_nid);
	if (!ret)
		return current_nid;

	ret = get_subnode_info(priv->regs, HDA_ROOT_NODE, &node_count,
			       &current_nid);
	if (ret < 0)
		return ret;

	end_nid = current_nid + node_count;
	while (current_nid < end_nid) {
		if (audio_group_has_beep_node(priv->regs, current_nid))
			return find_beep_node_in_group(priv->regs,
						       current_nid);
		current_nid++;
	}
	 /* no beep node found */

	return -ENOENT;
}

/**
 * set_beep_divisor() - Sets the beep divisor to set the pitch
 *
 * @priv: Device's private data
 * @divider: Divider value (0 to disable the beep)
 * @return 0 if OK, -ve on error
 */
static int set_beep_divisor(struct hda_codec_priv *priv, uint divider)
{
	return exec_verb(priv->regs,
			 hda_verb(priv->beep_nid, HDA_VERB_SET_BEEP, divider),
			 NULL);
}

int hda_codec_init(struct udevice *dev)
{
	struct hda_codec_priv *priv = dev_get_priv(dev);
	ulong base_addr;

	base_addr = dm_pci_read_bar32(dev, 0);
	log_debug("base = %08lx\n", base_addr);
	if (!base_addr)
		return -EINVAL;

	priv->regs = (struct hda_regs *)base_addr;

	return 0;
}

int hda_codec_finish_init(struct udevice *dev)
{
	struct hda_codec_priv *priv = dev_get_priv(dev);
	int ret;

	ret = get_hda_beep_nid(dev);
	if (ret <= 0) {
		log_warning("Could not find beep NID (err=%d)\n", ret);
		return ret ? ret : -ENOENT;
	}
	priv->beep_nid = ret;

	return 0;
}

int hda_codec_start_beep(struct udevice *dev, int frequency_hz)
{
	struct hda_codec_priv *priv = dev_get_priv(dev);
	uint divider_val;

	if (!priv->beep_nid) {
		log_err("Failed to find a beep-capable node\n");
		return -ENOENT;
	}

	if (!frequency_hz)
		divider_val = 0;	/* off */
	else if (frequency_hz > BEEP_FREQ_BASE)
		divider_val = 1;
	else if (frequency_hz < BEEP_FREQ_BASE / 0xff)
		divider_val = 0xff;
	else
		divider_val = 0xff & (BEEP_FREQ_BASE / frequency_hz);

	return set_beep_divisor(priv, divider_val);
}

int hda_codec_stop_beep(struct udevice *dev)
{
	struct hda_codec_priv *priv = dev_get_priv(dev);

	return set_beep_divisor(priv, 0);
}

static const struct sound_ops hda_codec_ops = {
	.setup		= hda_codec_finish_init,
	.start_beep	= hda_codec_start_beep,
	.stop_beep	= hda_codec_stop_beep,
};

U_BOOT_DRIVER(hda_codec) = {
	.name		= "hda_codec",
	.id		= UCLASS_SOUND,
	.ops		= &hda_codec_ops,
	.priv_auto_alloc_size	= sizeof(struct hda_codec_priv),
	.probe		= hda_codec_init,
};

static struct pci_device_id hda_supported[] = {
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_HDA},
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_HDA},
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL,
		PCI_DEVICE_ID_INTEL_WILDCATPOINT_HDA) },

	/*
	 * Note this driver is not necessarily generic, but it attempts to
	 * support any codec in the hd-audio class
	 */
	{ PCI_DEVICE_CLASS(PCI_CLASS_MULTIMEDIA_HD_AUDIO, 0xffffff) },
};

U_BOOT_PCI_DEVICE(hda_codec, hda_supported);
Commit	Line	Data
2ca47137 SG	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Implementation of per-board codec beeping
	4	* Copyright (c) 2011 The Chromium OS Authors.
	5	* Copyright 2018 Google LLC
	6	*/
	7
	8	#define LOG_CATEGORY UCLASS_SOUND
	9
	10	#include <common.h>
	11	#include <dm.h>
	12	#include <hda_codec.h>
f7ae49fc	13	#include <log.h>
2ca47137 SG	14	#include <pci.h>
	15	#include <sound.h>
	16	#include <asm/io.h>
	17	#include <dt-bindings/sound/azalia.h>
	18
	19	/**
	20	* struct hda_regs - HDA registers
	21	*
	22	* https://wiki.osdev.org/Intel_High_Definition_Audio
	23	* https://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html
	24	*/
	25	struct hda_regs {
	26	u16 gcap;
	27	u8 vmin;
	28	u8 vmaj;
	29	u16 outpay;
	30	u16 inpay;
	31	u32 gctl;
	32	u16 wakeen;
	33	u16 statests;
	34	u8 reserved[0x50];
	35	u32 cmd; /* 0x60 */
	36	u32 resp;
	37	u32 icii;
	38	};
	39
	40	enum {
	41	HDA_ICII_BUSY = BIT(0),
	42	HDA_ICII_VALID = BIT(1),
	43
	44	/* Common node IDs */
	45	HDA_ROOT_NODE = 0x00,
	46
	47	/* HDA verbs fields */
	48	HDA_VERB_NID_S = 20,
	49	HDA_VERB_VERB_S = 8,
	50	HDA_VERB_PARAM_S = 0,
	51
	52	HDA_VERB_GET_PARAMS = 0xf00,
	53	HDA_VERB_SET_BEEP = 0x70a,
	54
	55	/* GET_PARAMS parameter IDs */
	56	GET_PARAMS_NODE_COUNT = 0x04,
	57	GET_PARAMS_AUDIO_GROUP_CAPS = 0x08,
	58	GET_PARAMS_AUDIO_WIDGET_CAPS = 0x09,
	59
	60	/* Sub-node fields */
	61	NUM_SUB_NODES_S = 0,
	62	NUM_SUB_NODES_M = 0xff << NUM_SUB_NODES_S,
	63	FIRST_SUB_NODE_S = 16,
	64	FIRST_SUB_NODE_M = 0xff << FIRST_SUB_NODE_S,
	65
	66	/* Get Audio Function Group Capabilities fields */
	67	AUDIO_GROUP_CAPS_BEEP_GEN = 0x10000,
	68
	69	/* Get Audio Widget Capabilities fields */
	70	AUDIO_WIDGET_TYPE_BEEP = 0x7,
	71	AUDIO_WIDGET_TYPE_S = 20,
	72	AUDIO_WIDGET_TYPE_M = 0xf << AUDIO_WIDGET_TYPE_S,
	73
	74	BEEP_FREQ_BASE = 12000,
	75	};
	76
	77	static inline uint hda_verb(uint nid, uint verb, uint param)
78	{
79	return nid << HDA_VERB_NID_S \| verb << HDA_VERB_VERB_S \|
80	param << HDA_VERB_PARAM_S;
81	}
82
83	int hda_wait_for_ready(struct hda_regs *regs)
84	{
85	int timeout = 1000; /* Use a 1msec timeout */
86
87	while (timeout--) {
88	u32 reg32 = readl(&regs->icii);
89
90	if (!(reg32 & HDA_ICII_BUSY))
91	return 0;
92	udelay(1);
93	}
94
95	return -ETIMEDOUT;
96	}
97
98	static int wait_for_response(struct hda_regs regs, uint response)
99	{
100	int timeout = 1000;
101	u32 reg32;
102
103	/* Send the verb to the codec */
104	setbits_le32(&regs->icii, HDA_ICII_BUSY \| HDA_ICII_VALID);
105
106	/* Use a 1msec timeout */
107	while (timeout--) {
108	reg32 = readl(&regs->icii);
109	if ((reg32 & (HDA_ICII_VALID \| HDA_ICII_BUSY)) ==
110	HDA_ICII_VALID) {
111	if (response)
112	*response = readl(&regs->resp);
113	return 0;
114	}
115	udelay(1);
116	}
117
118	return -ETIMEDOUT;
119	}
120
121	int hda_wait_for_valid(struct hda_regs *regs)
122	{
123	return wait_for_response(regs, NULL);
124	}
125
126	static int set_bits(void *port, u32 mask, u32 val)
127	{
128	u32 reg32;
129	int count;
130
131	/* Write (val & mask) to port */
132	clrsetbits_le32(port, mask, val);
133
134	/* Wait for readback of register to match what was just written to it */
135	count = 50;
136	do {
137	/* Wait 1ms based on BKDG wait time */
138	mdelay(1);
139	reg32 = readl(port) & mask;
140	} while (reg32 != val && --count);
141
142	/* Timeout occurred */
143	if (!count)
144	return -ETIMEDOUT;
145
146	return 0;
147	}
148
149	int hda_codec_detect(struct hda_regs *regs)
150	{
151	uint reg8;
152
153	/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
154	if (set_bits(&regs->gctl, 1, 1))
155	goto no_codec;
156
157	/* Write back the value once reset bit is set */
158	writew(readw(&regs->gcap), &regs->gcap);
159
160	/* Read in Codec location */
161	reg8 = readb(&regs->statests) & 0xf;
162	if (!reg8)
163	goto no_codec;
164
165	return reg8;
166
167	no_codec:
168	/* Codec Not found - put HDA back in reset */
169	set_bits(&regs->gctl, 1, 0);
170	log_debug("No codec\n");
171
172	return 0;
173	}
174
175	static int find_verb_data(struct udevice dev, uint id, ofnode nodep)
176	{
177	ofnode parent = dev_read_subnode(dev, "codecs");
178	ofnode node;
179	u32 vendor_id, device_id;
180
181	ofnode_for_each_subnode(node, parent) {
182	if (ofnode_read_u32(node, "vendor-id", &vendor_id) \|\|
183	ofnode_read_u32(node, "device-id", &device_id)) {
184	log_debug("Cannot get IDs for '%s'\n",
185	ofnode_get_name(node));
186	return -EINVAL;
187	}
188	if (id != (vendor_id << 16 \| device_id)) {
189	log_debug("Skip codec node '%s' for %08x\n",
190	ofnode_get_name(node), id);
191	continue;
192	}
193
194	log_debug("Found codec node '%s' for %08x\n",
195	ofnode_get_name(node), id);
196	*nodep = node;
197	return 0;
198	}
199
200	return -ENOENT;
201	}
202
203	static int send_verbs(ofnode node, const char prop_name, struct hda_regs regs)
204	{
205	int ret, verb_size, i;
206	const u32 *verb;
207
208	verb = ofnode_get_property(node, prop_name, &verb_size);
209	if (verb_size < 0) {
210	log_debug("No verb data\n");
211	return -EINVAL;
212	}
213	log_debug("verb_size: %d\n", verb_size);
214
215	for (i = 0; i < verb_size / sizeof(*verb); i++) {
216	ret = hda_wait_for_ready(regs);
217	if (ret) {
218	log_debug(" codec ready timeout\n");
219	return ret;
220	}
221
222	writel(fdt32_to_cpu(verb[i]), &regs->cmd);
223
224	ret = hda_wait_for_valid(regs);
225	if (ret) {
226	log_debug(" codec valid timeout\n");
227	return ret;
228	}
229	}
230
231	return 0;
232	}
233
234	static int codec_init(struct udevice dev, struct hda_regs regs, uint addr)
235	{
236	ofnode node;
237	uint id;
238	int ret;
239
240	log_debug("Initializing codec #%d\n", addr);
241	ret = hda_wait_for_ready(regs);
242	if (ret) {
243	log_debug(" codec not ready\n");
244	return ret;
245	}
246
247	/* Read the codec's vendor ID */
248	writel(addr << AZALIA_CODEC_SHIFT \|
249	AZALIA_OPCODE_READ_PARAM << AZALIA_VERB_SHIFT \|
250	AZALIA_PARAM_VENDOR_ID, &regs->cmd);
251	ret = hda_wait_for_valid(regs);
252	if (ret) {
253	log_debug(" codec not valid\n");
254	return ret;
255	}
256
257	id = readl(&regs->resp);
258	log_debug("codec vid/did: %08x\n", id);
259	ret = find_verb_data(dev, id, &node);
260	if (ret) {
261	log_debug("No verb (err=%d)\n", ret);
262	return ret;
263	}
264	ret = send_verbs(node, "verbs", regs);
265	if (ret) {
266	log_debug("failed to send verbs (err=%d)\n", ret);
267	return ret;
268	}
269	log_debug("verb loaded\n");
270
271	return 0;
272	}
273
274	int hda_codecs_init(struct udevice dev, struct hda_regs regs, u32 codec_mask)
275	{
276	int ret;
277	int i;
278
279	for (i = 3; i >= 0; i--) {
280	if (codec_mask & (1 << i)) {
281	ret = codec_init(dev, regs, i);
282	if (ret)
283	return ret;
284	}
285	}
286
287	ret = send_verbs(dev_ofnode(dev), "beep-verbs", regs);
288	if (ret) {
289	log_debug("failed to send beep verbs (err=%d)\n", ret);
290	return ret;
291	}
292	log_debug("beep verbs loaded\n");
293
294	return 0;
295	}
296
297	/**
298	* exec_verb() - Write a verb to the codec
299	*
300	* @regs: HDA registers
301	* @val: Command to write
302	* @response: Set to response from codec
303	* @return 0 if OK, -ve on error
304	*/
305	static int exec_verb(struct hda_regs regs, uint val, uint response)
306	{
307	int ret;
308
309	ret = hda_wait_for_ready(regs);
310	if (ret)
311	return ret;
312
313	writel(val, &regs->cmd);
314
315	return wait_for_response(regs, response);
316	}
317
318	/**
319	* get_subnode_info() - Get subnode information
320	*
321	* @regs: HDA registers
322	* @nid: Parent node ID to check
323	* @num_sub_nodesp: Returns number of subnodes
324	* @start_sub_node_nidp: Returns start subnode number
325	* @return 0 if OK, -ve on error
326	*/
327	static int get_subnode_info(struct hda_regs *regs, uint nid,
328	uint num_sub_nodesp, uint start_sub_node_nidp)
329	{
330	uint response;
331	int ret;
332
333	ret = exec_verb(regs, hda_verb(nid, HDA_VERB_GET_PARAMS,
334	GET_PARAMS_NODE_COUNT),
335	&response);
336	if (ret < 0) {
337	printf("Audio: Error reading sub-node info %d\n", nid);
338	return ret;
339	}
340
341	*num_sub_nodesp = (response & NUM_SUB_NODES_M) >> NUM_SUB_NODES_S;
342	*start_sub_node_nidp = (response & FIRST_SUB_NODE_M) >>
343	FIRST_SUB_NODE_S;
344
345	return 0;
346	}
347
348	/**
349	* find_beep_node_in_group() - Finds the beeping node
350	*
351	* Searches the audio group for a node that supports beeping
352	*
353	* @regs: HDA registers
354	* @group_nid: Group node ID to check
355	* @return 0 if OK, -ve on error
356	*/
357	static uint find_beep_node_in_group(struct hda_regs *regs, uint group_nid)
358	{
359	uint node_count = 0;
360	uint current_nid = 0;
361	uint response;
362	uint end_nid;
363	int ret;
364
365	ret = get_subnode_info(regs, group_nid, &node_count, &current_nid);
366	if (ret < 0)
367	return 0;
368
369	end_nid = current_nid + node_count;
370	while (current_nid < end_nid) {
371	ret = exec_verb(regs,
372	hda_verb(current_nid, HDA_VERB_GET_PARAMS,
373	GET_PARAMS_AUDIO_WIDGET_CAPS),
374	&response);
375	if (ret < 0) {
376	printf("Audio: Error reading widget caps\n");
377	return 0;
378	}
379
380	if ((response & AUDIO_WIDGET_TYPE_M) >> AUDIO_WIDGET_TYPE_S ==
381	AUDIO_WIDGET_TYPE_BEEP)
382	return current_nid;
383
384	current_nid++;
385	}
386
387	return 0; /* no beep node found */
388	}
389
390	/**
391	* audio_group_has_beep_node() - Check if group has a beep node
392	*
393	* Checks if the given audio group contains a beep generator
394	* @regs: HDA registers
395	* @nid: Node ID to check
396	* @return 0 if OK, -ve on error
397	*/
398	static int audio_group_has_beep_node(struct hda_regs *regs, uint nid)
399	{
400	uint response;
401	int ret;
402
403	ret = exec_verb(regs, hda_verb(nid, HDA_VERB_GET_PARAMS,
404	GET_PARAMS_AUDIO_GROUP_CAPS),
405	&response);
406	if (ret < 0) {
407	printf("Audio: Error reading audio group caps %d\n", nid);
408	return 0;
409	}
410
411	return !!(response & AUDIO_GROUP_CAPS_BEEP_GEN);
412	}
413
414	/**
415	* get_hda_beep_nid() - Finds the node ID of the beep node
416	*
417	* Finds the nid of the beep node if it exists. Starts at the root node, for
418	* each sub-node checks if the group contains a beep node. If the group
419	* contains a beep node, polls each node in the group until it is found.
420	*
421	* If the device has a intel,beep-nid property, the value of that is used
422	* instead.
423	*
424	* @dev: Sound device
425	* @return Node ID >0 if found, -ve error code otherwise
426	*/
427	static int get_hda_beep_nid(struct udevice *dev)
428	{
429	struct hda_codec_priv *priv = dev_get_priv(dev);
430	uint current_nid = 0;
431	uint node_count = 0;
432	uint end_nid;
433	int ret;
434
435	/* If the field exists, use the beep nid set in the fdt */
436	ret = dev_read_u32(dev, "intel,beep-nid", &current_nid);
437	if (!ret)
438	return current_nid;
439
440	ret = get_subnode_info(priv->regs, HDA_ROOT_NODE, &node_count,
441	&current_nid);
442	if (ret < 0)
443	return ret;
444
445	end_nid = current_nid + node_count;
446	while (current_nid < end_nid) {
447	if (audio_group_has_beep_node(priv->regs, current_nid))
448	return find_beep_node_in_group(priv->regs,
449	current_nid);
450	current_nid++;
451	}
452	/* no beep node found */
453
454	return -ENOENT;
455	}
456
457	/**
458	* set_beep_divisor() - Sets the beep divisor to set the pitch
459	*
460	* @priv: Device's private data
461	* @divider: Divider value (0 to disable the beep)
462	* @return 0 if OK, -ve on error
463	*/
464	static int set_beep_divisor(struct hda_codec_priv *priv, uint divider)
465	{
466	return exec_verb(priv->regs,
467	hda_verb(priv->beep_nid, HDA_VERB_SET_BEEP, divider),
468	NULL);
469	}
470
471	int hda_codec_init(struct udevice *dev)
472	{
473	struct hda_codec_priv *priv = dev_get_priv(dev);
474	ulong base_addr;
475
476	base_addr = dm_pci_read_bar32(dev, 0);
477	log_debug("base = %08lx\n", base_addr);
478	if (!base_addr)
479	return -EINVAL;
480
481	priv->regs = (struct hda_regs *)base_addr;
482
483	return 0;
484	}
485
486	int hda_codec_finish_init(struct udevice *dev)
487	{
488	struct hda_codec_priv *priv = dev_get_priv(dev);
489	int ret;
490
491	ret = get_hda_beep_nid(dev);
492	if (ret <= 0) {
493	log_warning("Could not find beep NID (err=%d)\n", ret);
494	return ret ? ret : -ENOENT;
495	}
496	priv->beep_nid = ret;
497
498	return 0;
499	}
500
501	int hda_codec_start_beep(struct udevice *dev, int frequency_hz)
502	{
503	struct hda_codec_priv *priv = dev_get_priv(dev);
504	uint divider_val;
505
506	if (!priv->beep_nid) {
507	log_err("Failed to find a beep-capable node\n");
508	return -ENOENT;
509	}
510
511	if (!frequency_hz)
512	divider_val = 0; /* off */
513	else if (frequency_hz > BEEP_FREQ_BASE)
514	divider_val = 1;
515	else if (frequency_hz < BEEP_FREQ_BASE / 0xff)
516	divider_val = 0xff;
517	else
518	divider_val = 0xff & (BEEP_FREQ_BASE / frequency_hz);
519
520	return set_beep_divisor(priv, divider_val);
521	}
522
523	int hda_codec_stop_beep(struct udevice *dev)
524	{
525	struct hda_codec_priv *priv = dev_get_priv(dev);
526
527	return set_beep_divisor(priv, 0);
528	}
529
530	static const struct sound_ops hda_codec_ops = {
531	.setup = hda_codec_finish_init,
532	.start_beep = hda_codec_start_beep,
533	.stop_beep = hda_codec_stop_beep,
534	};
535
536	U_BOOT_DRIVER(hda_codec) = {
537	.name = "hda_codec",
538	.id = UCLASS_SOUND,
539	.ops = &hda_codec_ops,
540	.priv_auto_alloc_size = sizeof(struct hda_codec_priv),
541	.probe = hda_codec_init,
542	};
543
544	static struct pci_device_id hda_supported[] = {
545	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_HDA},
546	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_HDA},
547	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL,
548	PCI_DEVICE_ID_INTEL_WILDCATPOINT_HDA) },
549
550	/*
551	* Note this driver is not necessarily generic, but it attempts to
552	* support any codec in the hd-audio class
553	*/
554	{ PCI_DEVICE_CLASS(PCI_CLASS_MULTIMEDIA_HD_AUDIO, 0xffffff) },
555	};
556
557	U_BOOT_PCI_DEVICE(hda_codec, hda_supported);