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 46static 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 55static 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) 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 180err_out_free: 181 pci_set_drvdata(pdev, NULL); 182 kfree(hw_config); 183 return 1; 184} 185 186static void __devexit remove_one(struct pci_dev *pdev) 187{ 188 struct address_info *hw_config = pci_get_drvdata(pdev); 189 sb_dsp_unload(hw_config, 0); 190 pci_set_drvdata(pdev, NULL); 191 kfree(hw_config); 192} 193 194MODULE_AUTHOR("Alan Cox"); 195MODULE_DESCRIPTION("Kahlua VSA1 PCI Audio"); 196MODULE_LICENSE("GPL"); 197 198/* 199 * 5530 only. The 5510/5520 decode is different. 200 */ 201 202static DEFINE_PCI_DEVICE_TABLE(id_tbl) = { 203 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO), 0 }, 204 { } 205}; 206 207MODULE_DEVICE_TABLE(pci, id_tbl); 208 209static struct pci_driver kahlua_driver = { 210 .name = "kahlua", 211 .id_table = id_tbl, 212 .probe = probe_one, 213 .remove = __devexit_p(remove_one), 214}; 215 216 217static int __init kahlua_init_module(void) 218{ 219 printk(KERN_INFO "Cyrix Kahlua VSA1 XpressAudio support (c) Copyright 2003 Red Hat Inc\n"); 220 return pci_register_driver(&kahlua_driver); 221} 222 223static void __devexit kahlua_cleanup_module(void) 224{ 225 pci_unregister_driver(&kahlua_driver); 226} 227 228 229module_init(kahlua_init_module); 230module_exit(kahlua_cleanup_module); 231