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
mixer_read(unsigned long io,u8 reg)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
probe_one(struct pci_dev * pdev,const struct pci_device_id * ent)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
remove_one(struct pci_dev * pdev)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 const struct pci_device_id 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
kahlua_init_module(void)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
kahlua_cleanup_module(void)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