cregit-Linux how code gets into the kernel

Release 4.7 sound/oss/sb_card.c

Directory: sound/oss
/*
 * sound/oss/sb_card.c
 *
 * Detection routine for the ISA Sound Blaster and compatible sound
 * cards.
 *
 * This file is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this
 * software for more info.
 *
 * This is a complete rewrite of the detection routines. This was
 * prompted by the PnP API change during v2.5 and the ugly state the
 * code was in.
 *
 * Copyright (C) by Paul Laufer 2002. Based on code originally by
 * Hannu Savolainen which was modified by many others over the
 * years. Authors specifically mentioned in the previous version were:
 * Daniel Stone, Alessandro Zummo, Jeff Garzik, Arnaldo Carvalho de
 * Melo, Daniel Church, and myself.
 *
 * 02-05-2003 Original Release, Paul Laufer <paul@laufernet.com>
 * 02-07-2003 Bug made it into first release. Take two.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/init.h>
#include "sound_config.h"
#include "sb_mixer.h"
#include "sb.h"
#ifdef CONFIG_PNP
#include <linux/pnp.h>
#endif /* CONFIG_PNP */
#include "sb_card.h"

MODULE_DESCRIPTION("OSS Soundblaster ISA PnP and legacy sound driver");
MODULE_LICENSE("GPL");

extern void *smw_free;


static int __initdata mpu_io	= 0;

static int __initdata io	= -1;

static int __initdata irq	= -1;

static int __initdata dma	= -1;

static int __initdata dma16	= -1;

static int __initdata type	= 0; 
/* Can set this to a specific card type */

static int __initdata esstype   = 0; 
/* ESS chip type */

static int __initdata acer 	= 0; 
/* Do acer notebook init? */

static int __initdata sm_games 	= 0; 
/* Logitech soundman games? */


static struct sb_card_config *legacy = NULL;

#ifdef CONFIG_PNP

static int pnp_registered;

static int __initdata pnp       = 1;
/*
static int __initdata uart401   = 0;
*/
#else

static int __initdata pnp       = 0;
#endif

module_param(io, int, 000);
MODULE_PARM_DESC(io,       "Soundblaster i/o base address (0x220,0x240,0x260,0x280)");
module_param(irq, int, 000);
MODULE_PARM_DESC(irq,	   "IRQ (5,7,9,10)");
module_param(dma, int, 000);
MODULE_PARM_DESC(dma,	   "8-bit DMA channel (0,1,3)");
module_param(dma16, int, 000);
MODULE_PARM_DESC(dma16,	   "16-bit DMA channel (5,6,7)");
module_param(mpu_io, int, 000);
MODULE_PARM_DESC(mpu_io,   "MPU base address");
module_param(type, int, 000);
MODULE_PARM_DESC(type,	   "You can set this to specific card type (doesn't " \
		 "work with pnp)");
module_param(sm_games, int, 000);
MODULE_PARM_DESC(sm_games, "Enable support for Logitech soundman games " \
		 "(doesn't work with pnp)");
module_param(esstype, int, 000);
MODULE_PARM_DESC(esstype,  "ESS chip type (doesn't work with pnp)");
module_param(acer, int, 000);
MODULE_PARM_DESC(acer,	   "Set this to detect cards in some ACER notebooks "\
		 "(doesn't work with pnp)");

#ifdef CONFIG_PNP
module_param(pnp, int, 000);
MODULE_PARM_DESC(pnp,     "Went set to 0 will disable detection using PnP. "\
		  "Default is 1.\n");
/* Not done yet.... */
/*
module_param(uart401, int, 000);
MODULE_PARM_DESC(uart401,  "When set to 1, will attempt to detect and enable"\
                 "the mpu on some clones");
*/
#endif /* CONFIG_PNP */

/* OSS subsystem card registration shared by PnP and legacy routines */

static int sb_register_oss(struct sb_card_config *scc, struct sb_module_options *sbmo) { if (!request_region(scc->conf.io_base, 16, "soundblaster")) { printk(KERN_ERR "sb: ports busy.\n"); kfree(scc); return -EBUSY; } if (!sb_dsp_detect(&scc->conf, 0, 0, sbmo)) { release_region(scc->conf.io_base, 16); printk(KERN_ERR "sb: Failed DSP Detect.\n"); kfree(scc); return -ENODEV; } if(!sb_dsp_init(&scc->conf, THIS_MODULE)) { printk(KERN_ERR "sb: Failed DSP init.\n"); kfree(scc); return -ENODEV; } if(scc->mpucnf.io_base > 0) { scc->mpu = 1; printk(KERN_INFO "sb: Turning on MPU\n"); if(!probe_sbmpu(&scc->mpucnf, THIS_MODULE)) scc->mpu = 0; } return 1; }

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Total170100.00%3100.00%


static void sb_unload(struct sb_card_config *scc) { sb_dsp_unload(&scc->conf, 0); if(scc->mpu) unload_sbmpu(&scc->mpucnf); kfree(scc); }

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/* Register legacy card with OSS subsystem */
static int __init sb_init_legacy(void) { struct sb_module_options sbmo = {0}; if((legacy = kzalloc(sizeof(struct sb_card_config), GFP_KERNEL)) == NULL) { printk(KERN_ERR "sb: Error: Could not allocate memory\n"); return -ENOMEM; } legacy->conf.io_base = io; legacy->conf.irq = irq; legacy->conf.dma = dma; legacy->conf.dma2 = dma16; legacy->conf.card_subtype = type; legacy->mpucnf.io_base = mpu_io; legacy->mpucnf.irq = -1; legacy->mpucnf.dma = -1; legacy->mpucnf.dma2 = -1; sbmo.esstype = esstype; sbmo.sm_games = sm_games; sbmo.acer = acer; return sb_register_oss(legacy, &sbmo); }

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robert p. j. dayrobert p. j. day10.67%125.00%
Total150100.00%4100.00%

#ifdef CONFIG_PNP /* Populate the OSS subsystem structures with information from PnP */
static void sb_dev2cfg(struct pnp_dev *dev, struct sb_card_config *scc) { scc->conf.io_base = -1; scc->conf.irq = -1; scc->conf.dma = -1; scc->conf.dma2 = -1; scc->mpucnf.io_base = -1; scc->mpucnf.irq = -1; scc->mpucnf.dma = -1; scc->mpucnf.dma2 = -1; /* All clones layout their PnP tables differently and some use different logical devices for the MPU */ if(!strncmp("CTL",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); scc->conf.dma2 = pnp_dma(dev,1); scc->mpucnf.io_base = pnp_port_start(dev,1); return; } if(!strncmp("tBA",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); scc->conf.dma2 = pnp_dma(dev,1); return; } if(!strncmp("ESS",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); scc->conf.dma2 = pnp_dma(dev,1); scc->mpucnf.io_base = pnp_port_start(dev,2); return; } if(!strncmp("CMI",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); scc->conf.dma2 = pnp_dma(dev,1); return; } if(!strncmp("RWB",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); return; } if(!strncmp("ALS",scc->card_id,3)) { if(!strncmp("ALS0007",scc->card_id,7)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,0); } else { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,1); scc->conf.dma2 = pnp_dma(dev,0); } return; } if(!strncmp("RTL",scc->card_id,3)) { scc->conf.io_base = pnp_port_start(dev,0); scc->conf.irq = pnp_irq(dev,0); scc->conf.dma = pnp_dma(dev,1); scc->conf.dma2 = pnp_dma(dev,0); } }

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Total642100.00%7100.00%

static unsigned int sb_pnp_devices; /* Probe callback function for the PnP API */
static int sb_pnp_probe(struct pnp_card_link *card, const struct pnp_card_device_id *card_id) { struct sb_card_config *scc; struct sb_module_options sbmo = {0}; /* Default to 0 for PnP */ struct pnp_dev *dev = pnp_request_card_device(card, card_id->devs[0].id, NULL); if(!dev){ return -EBUSY; } if((scc = kzalloc(sizeof(struct sb_card_config), GFP_KERNEL)) == NULL) { printk(KERN_ERR "sb: Error: Could not allocate memory\n"); return -ENOMEM; } printk(KERN_INFO "sb: PnP: Found Card Named = \"%s\", Card PnP id = " \ "%s, Device PnP id = %s\n", card->card->name, card_id->id, dev->id->id); scc->card_id = card_id->id; scc->dev_id = dev->id->id; sb_dev2cfg(dev, scc); printk(KERN_INFO "sb: PnP: Detected at: io=0x%x, irq=%d, " \ "dma=%d, dma16=%d\n", scc->conf.io_base, scc->conf.irq, scc->conf.dma, scc->conf.dma2); pnp_set_card_drvdata(card, scc); sb_pnp_devices++; return sb_register_oss(scc, &sbmo); }

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robert p. j. dayrobert p. j. day10.52%16.25%
Total194100.00%16100.00%


static void sb_pnp_remove(struct pnp_card_link *card) { struct sb_card_config *scc = pnp_get_card_drvdata(card); if(!scc) return; printk(KERN_INFO "sb: PnP: Removing %s\n", scc->card_id); sb_unload(scc); }

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static struct pnp_card_driver sb_pnp_driver = { .name = "OSS SndBlstr", /* 16 character limit */ .id_table = sb_pnp_card_table, .probe = sb_pnp_probe, .remove = sb_pnp_remove, }; MODULE_DEVICE_TABLE(pnp_card, sb_pnp_card_table); #endif /* CONFIG_PNP */
static void sb_unregister_all(void) { #ifdef CONFIG_PNP if (pnp_registered) pnp_unregister_card_driver(&sb_pnp_driver); #endif }

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static int __init sb_init(void) { int lres = 0; int pres = 0; printk(KERN_INFO "sb: Init: Starting Probe...\n"); if(io != -1 && irq != -1 && dma != -1) { printk(KERN_INFO "sb: Probing legacy card with io=%x, "\ "irq=%d, dma=%d, dma16=%d\n",io, irq, dma, dma16); lres = sb_init_legacy(); } else if((io != -1 || irq != -1 || dma != -1) || (!pnp && (io == -1 && irq == -1 && dma == -1))) printk(KERN_ERR "sb: Error: At least io, irq, and dma "\ "must be set for legacy cards.\n"); #ifdef CONFIG_PNP if(pnp) { int err = pnp_register_card_driver(&sb_pnp_driver); if (!err) pnp_registered = 1; pres = sb_pnp_devices; } #endif printk(KERN_INFO "sb: Init: Done\n"); /* If either PnP or Legacy registered a card then return * success */ if (pres == 0 && lres <= 0) { sb_unregister_all(); return -ENODEV; } return 0; }

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william lee irwin iiiwilliam lee irwin iii126.78%19.09%
Total177100.00%11100.00%


static void __exit sb_exit(void) { printk(KERN_INFO "sb: Unloading...\n"); /* Unload legacy card */ if (legacy) { printk (KERN_INFO "sb: Unloading legacy card\n"); sb_unload(legacy); } sb_unregister_all(); vfree(smw_free); smw_free = NULL; }

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Total45100.00%8100.00%

module_init(sb_init); module_exit(sb_exit);

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adam belayadam belay113360.49%513.89%
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andrew mortonandrew morton693.68%12.78%
linus torvaldslinus torvalds613.26%25.56%
bjorn helgaasbjorn helgaas573.04%12.78%
al viroal viro442.35%12.78%
william lee irwin iiiwilliam lee irwin iii120.64%12.78%
thierry vignaudthierry vignaud70.37%12.78%
tejun heotejun heo30.16%12.78%
robert p. j. dayrobert p. j. day20.11%12.78%
lucas de marchilucas de marchi10.05%12.78%
adrian bunkadrian bunk10.05%12.78%
Total1873100.00%36100.00%
Directory: sound/oss
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