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1da177e4 LT |
1 | /* |
2 | * Initialisation code for Cyrix/NatSemi VSA1 softaudio | |
3 | * | |
4 | * (C) Copyright 2003 Red Hat Inc <alan@redhat.com> | |
5 | * | |
6 | * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems. | |
7 | * The older version (VSA1) provides fairly good soundblaster emulation | |
8 | * although there are a couple of bugs: large DMA buffers break record, | |
9 | * and the MPU event handling seems suspect. VSA2 allows the native driver | |
10 | * to control the AC97 audio engine directly and requires a different driver. | |
11 | * | |
12 | * Thanks to National Semiconductor for providing the needed information | |
13 | * on the XpressAudio(tm) internals. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2, or (at your option) any | |
18 | * later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, but | |
21 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
23 | * General Public License for more details. | |
24 | * | |
25 | * TO DO: | |
26 | * Investigate whether we can portably support Cognac (5520) in the | |
27 | * same manner. | |
28 | */ | |
29 | ||
30 | #include <linux/config.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/pci.h> | |
35 | ||
36 | #include "sound_config.h" | |
37 | ||
38 | #include "sb.h" | |
39 | ||
40 | /* | |
41 | * Read a soundblaster compatible mixer register. | |
42 | * In this case we are actually reading an SMI trap | |
43 | * not real hardware. | |
44 | */ | |
45 | ||
46 | static u8 __devinit mixer_read(unsigned long io, u8 reg) | |
47 | { | |
48 | outb(reg, io + 4); | |
49 | udelay(20); | |
50 | reg = inb(io + 5); | |
51 | udelay(20); | |
52 | return reg; | |
53 | } | |
54 | ||
55 | static int __devinit probe_one(struct pci_dev *pdev, const struct pci_device_id *ent) | |
56 | { | |
57 | struct address_info *hw_config; | |
58 | unsigned long base; | |
59 | void __iomem *mem; | |
60 | unsigned long io; | |
61 | u16 map; | |
62 | u8 irq, dma8, dma16; | |
63 | int oldquiet; | |
64 | extern int sb_be_quiet; | |
65 | ||
66 | base = pci_resource_start(pdev, 0); | |
67 | if(base == 0UL) | |
68 | return 1; | |
69 | ||
70 | mem = ioremap(base, 128); | |
71 | if(mem == 0UL) | |
72 | return 1; | |
73 | map = readw(mem + 0x18); /* Read the SMI enables */ | |
74 | iounmap(mem); | |
75 | ||
76 | /* Map bits | |
77 | 0:1 * 0x20 + 0x200 = sb base | |
78 | 2 sb enable | |
79 | 3 adlib enable | |
80 | 5 MPU enable 0x330 | |
81 | 6 MPU enable 0x300 | |
82 | ||
83 | The other bits may be used internally so must be masked */ | |
84 | ||
85 | io = 0x220 + 0x20 * (map & 3); | |
86 | ||
87 | if(map & (1<<2)) | |
88 | printk(KERN_INFO "kahlua: XpressAudio at 0x%lx\n", io); | |
89 | else | |
90 | return 1; | |
91 | ||
92 | if(map & (1<<5)) | |
93 | printk(KERN_INFO "kahlua: MPU at 0x300\n"); | |
94 | else if(map & (1<<6)) | |
95 | printk(KERN_INFO "kahlua: MPU at 0x330\n"); | |
96 | ||
97 | irq = mixer_read(io, 0x80) & 0x0F; | |
98 | dma8 = mixer_read(io, 0x81); | |
99 | ||
100 | // printk("IRQ=%x MAP=%x DMA=%x\n", irq, map, dma8); | |
101 | ||
102 | if(dma8 & 0x20) | |
103 | dma16 = 5; | |
104 | else if(dma8 & 0x40) | |
105 | dma16 = 6; | |
106 | else if(dma8 & 0x80) | |
107 | dma16 = 7; | |
108 | else | |
109 | { | |
110 | printk(KERN_ERR "kahlua: No 16bit DMA enabled.\n"); | |
111 | return 1; | |
112 | } | |
113 | ||
114 | if(dma8 & 0x01) | |
115 | dma8 = 0; | |
116 | else if(dma8 & 0x02) | |
117 | dma8 = 1; | |
118 | else if(dma8 & 0x08) | |
119 | dma8 = 3; | |
120 | else | |
121 | { | |
122 | printk(KERN_ERR "kahlua: No 8bit DMA enabled.\n"); | |
123 | return 1; | |
124 | } | |
125 | ||
126 | if(irq & 1) | |
127 | irq = 9; | |
128 | else if(irq & 2) | |
129 | irq = 5; | |
130 | else if(irq & 4) | |
131 | irq = 7; | |
132 | else if(irq & 8) | |
133 | irq = 10; | |
134 | else | |
135 | { | |
136 | printk(KERN_ERR "kahlua: SB IRQ not set.\n"); | |
137 | return 1; | |
138 | } | |
139 | ||
140 | printk(KERN_INFO "kahlua: XpressAudio on IRQ %d, DMA %d, %d\n", | |
141 | irq, dma8, dma16); | |
142 | ||
143 | hw_config = kmalloc(sizeof(struct address_info), GFP_KERNEL); | |
144 | if(hw_config == NULL) | |
145 | { | |
146 | printk(KERN_ERR "kahlua: out of memory.\n"); | |
147 | return 1; | |
148 | } | |
149 | memset(hw_config, 0, sizeof(*hw_config)); | |
150 | ||
151 | pci_set_drvdata(pdev, hw_config); | |
152 | ||
153 | hw_config->io_base = io; | |
154 | hw_config->irq = irq; | |
155 | hw_config->dma = dma8; | |
156 | hw_config->dma2 = dma16; | |
157 | hw_config->name = "Cyrix XpressAudio"; | |
158 | hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ; | |
159 | ||
160 | if (!request_region(io, 16, "soundblaster")) | |
161 | goto err_out_free; | |
162 | ||
163 | if(sb_dsp_detect(hw_config, 0, 0, NULL)==0) | |
164 | { | |
165 | printk(KERN_ERR "kahlua: audio not responding.\n"); | |
166 | release_region(io, 16); | |
167 | goto err_out_free; | |
168 | } | |
169 | ||
170 | oldquiet = sb_be_quiet; | |
171 | sb_be_quiet = 1; | |
172 | if(sb_dsp_init(hw_config, THIS_MODULE)) | |
173 | { | |
174 | sb_be_quiet = oldquiet; | |
175 | goto err_out_free; | |
176 | } | |
177 | sb_be_quiet = oldquiet; | |
178 | ||
179 | return 0; | |
180 | ||
181 | err_out_free: | |
182 | pci_set_drvdata(pdev, NULL); | |
183 | kfree(hw_config); | |
184 | return 1; | |
185 | } | |
186 | ||
187 | static void __devexit remove_one(struct pci_dev *pdev) | |
188 | { | |
189 | struct address_info *hw_config = pci_get_drvdata(pdev); | |
190 | sb_dsp_unload(hw_config, 0); | |
191 | pci_set_drvdata(pdev, NULL); | |
192 | kfree(hw_config); | |
193 | } | |
194 | ||
195 | MODULE_AUTHOR("Alan Cox"); | |
196 | MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio"); | |
197 | MODULE_LICENSE("GPL"); | |
198 | ||
199 | /* | |
200 | * 5530 only. The 5510/5520 decode is different. | |
201 | */ | |
202 | ||
203 | static struct pci_device_id id_tbl[] = { | |
204 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, | |
205 | { } | |
206 | }; | |
207 | ||
208 | MODULE_DEVICE_TABLE(pci, id_tbl); | |
209 | ||
210 | static struct pci_driver kahlua_driver = { | |
211 | .name = "kahlua", | |
212 | .id_table = id_tbl, | |
213 | .probe = probe_one, | |
214 | .remove = __devexit_p(remove_one), | |
215 | }; | |
216 | ||
217 | ||
218 | static int __init kahlua_init_module(void) | |
219 | { | |
220 | printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n"); | |
221 | return pci_module_init(&kahlua_driver); | |
222 | } | |
223 | ||
224 | static void __devexit kahlua_cleanup_module(void) | |
225 | { | |
226 | pci_unregister_driver(&kahlua_driver); | |
227 | } | |
228 | ||
229 | ||
230 | module_init(kahlua_init_module); | |
231 | module_exit(kahlua_cleanup_module); | |
232 |