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1 | /* |
2 | * Initialisation code for Cyrix/NatSemi VSA1 softaudio |
3 | * |
4 | * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk> |
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/delay.h> |
31 | #include <linux/init.h> |
32 | #include <linux/module.h> |
33 | #include <linux/pci.h> |
34 | #include <linux/slab.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 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 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) |
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 = kzalloc(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 | |
150 | pci_set_drvdata(pdev, hw_config); |
151 | |
152 | hw_config->io_base = io; |
153 | hw_config->irq = irq; |
154 | hw_config->dma = dma8; |
155 | hw_config->dma2 = dma16; |
156 | hw_config->name = "Cyrix XpressAudio"; |
157 | hw_config->driver_use_1 = SB_NO_MIDI | SB_PCI_IRQ; |
158 | |
159 | if (!request_region(io, 16, "soundblaster")) |
160 | goto err_out_free; |
161 | |
162 | if(sb_dsp_detect(hw_config, 0, 0, NULL)==0) |
163 | { |
164 | printk(KERN_ERR "kahlua: audio not responding.\n"); |
165 | release_region(io, 16); |
166 | goto err_out_free; |
167 | } |
168 | |
169 | oldquiet = sb_be_quiet; |
170 | sb_be_quiet = 1; |
171 | if(sb_dsp_init(hw_config, THIS_MODULE)) |
172 | { |
173 | sb_be_quiet = oldquiet; |
174 | goto err_out_free; |
175 | } |
176 | sb_be_quiet = oldquiet; |
177 | |
178 | return 0; |
179 | |
180 | err_out_free: |
181 | kfree(hw_config); |
182 | return 1; |
183 | } |
184 | |
185 | static void remove_one(struct pci_dev *pdev) |
186 | { |
187 | struct address_info *hw_config = pci_get_drvdata(pdev); |
188 | sb_dsp_unload(hw_config, 0); |
189 | kfree(hw_config); |
190 | } |
191 | |
192 | MODULE_AUTHOR("Alan Cox"); |
193 | MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio"); |
194 | MODULE_LICENSE("GPL"); |
195 | |
196 | /* |
197 | * 5530 only. The 5510/5520 decode is different. |
198 | */ |
199 | |
200 | static DEFINE_PCI_DEVICE_TABLE(id_tbl) = { |
201 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 }, |
202 | { } |
203 | }; |
204 | |
205 | MODULE_DEVICE_TABLE(pci, id_tbl); |
206 | |
207 | static struct pci_driver kahlua_driver = { |
208 | .name = "kahlua", |
209 | .id_table = id_tbl, |
210 | .probe = probe_one, |
211 | .remove = remove_one, |
212 | }; |
213 | |
214 | |
215 | static int __init kahlua_init_module(void) |
216 | { |
217 | printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n"); |
218 | return pci_register_driver(&kahlua_driver); |
219 | } |
220 | |
221 | static void kahlua_cleanup_module(void) |
222 | { |
223 | pci_unregister_driver(&kahlua_driver); |
224 | } |
225 | |
226 | |
227 | module_init(kahlua_init_module); |
228 | module_exit(kahlua_cleanup_module); |
229 | |
230 |
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