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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #include <console/console.h>
4 #include <device/device.h>
5 #include <device/pci.h>
6 #include <device/pci_ids.h>
7 #include <device/pci_ops.h>
8 #include <device/mmio.h>
9 #include <device/azalia_device.h>
10 #include "chip.h"
11 #include "i82801jx.h"
12 
codec_detect(u8 * base)13 static int codec_detect(u8 *base)
14 {
15 	u32 reg32;
16 
17 	if (azalia_enter_reset(base) < 0)
18 		goto no_codec;
19 
20 	if (azalia_exit_reset(base) < 0)
21 		goto no_codec;
22 
23 	/* Read in Codec location (BAR + 0xe)[2..0] */
24 	reg32 = read32(base + HDA_STATESTS_REG);
25 	reg32 &= 0x0f;
26 	if (!reg32)
27 		goto no_codec;
28 
29 	return reg32;
30 
31 no_codec:
32 	/* Codec not found, put HDA back in reset */
33 	azalia_enter_reset(base);
34 	printk(BIOS_DEBUG, "Azalia: No codec!\n");
35 	return 0;
36 }
37 
azalia_init(struct device * dev)38 static void azalia_init(struct device *dev)
39 {
40 	u8 *base;
41 	struct resource *res;
42 	u32 codec_mask;
43 
44 	// ESD
45 	pci_update_config32(dev, 0x134, ~0x00ff0000, 2 << 16);
46 
47 	// Link1 description
48 	pci_update_config32(dev, 0x140, ~0x00ff0000, 2 << 16);
49 
50 	// Port VC0 Resource Control Register
51 	pci_update_config32(dev, 0x114, ~0x000000ff, 1);
52 
53 	// VCi traffic class
54 	pci_or_config8(dev, 0x44, 7 << 0); // TC7
55 
56 	// VCi Resource Control
57 	pci_or_config32(dev, 0x120, (1 << 31) | (1 << 24) | (0x80 << 0)); /* VCi ID and map */
58 
59 	/* Set Bus Master */
60 	pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
61 
62 	// Docking not supported
63 	pci_and_config8(dev, 0x4d, (u8)~(1 << 7)); // Docking Status
64 
65 	/* Lock some R/WO bits by writing their current value. */
66 	pci_update_config32(dev, 0x74, ~0, 0);
67 
68 	res = probe_resource(dev, PCI_BASE_ADDRESS_0);
69 	if (!res)
70 		return;
71 
72 	// NOTE this will break as soon as the Azalia gets a bar above 4G.
73 	// Is there anything we can do about it?
74 	base = res2mmio(res, 0, 0);
75 	printk(BIOS_DEBUG, "Azalia: base = %p\n", base);
76 	codec_mask = codec_detect(base);
77 
78 	if (codec_mask) {
79 		printk(BIOS_DEBUG, "Azalia: codec_mask = %02x\n", codec_mask);
80 		azalia_codecs_init(base, codec_mask);
81 	}
82 }
83 
84 static struct device_operations azalia_ops = {
85 	.read_resources		= pci_dev_read_resources,
86 	.set_resources		= pci_dev_set_resources,
87 	.enable_resources	= pci_dev_enable_resources,
88 	.init			= azalia_init,
89 	.ops_pci		= &pci_dev_ops_pci,
90 };
91 
92 static const unsigned short pci_device_ids[] = {
93 	0x3a3e,
94 	0x3a6e,
95 	0
96 };
97 
98 static const struct pci_driver i82801jx_azalia __pci_driver = {
99 	.ops	= &azalia_ops,
100 	.vendor	= PCI_VID_INTEL,
101 	.devices	= pci_device_ids,
102 };
103