sb8.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  Driver for SoundBlaster 1.0/2.0/Pro soundcards and compatible
  4 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  5 */
  6
  7#include <linux/init.h>
  8#include <linux/err.h>
  9#include <linux/isa.h>
 10#include <linux/ioport.h>
 11#include <linux/module.h>
 12#include <linux/string.h>
 13#include <sound/core.h>
 14#include <sound/sb.h>
 15#include <sound/opl3.h>
 16#include <sound/initval.h>
 17
 18MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 19MODULE_DESCRIPTION("Sound Blaster 1.0/2.0/Pro");
 20MODULE_LICENSE("GPL");
 21
 22static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
 23static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
 24static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
 25static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220,0x240,0x260 */
 26static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5,7,9,10 */
 27static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 1,3 */
 28
 29module_param_array(index, int, NULL, 0444);
 30MODULE_PARM_DESC(index, "Index value for Sound Blaster soundcard.");
 31module_param_array(id, charp, NULL, 0444);
 32MODULE_PARM_DESC(id, "ID string for Sound Blaster soundcard.");
 33module_param_array(enable, bool, NULL, 0444);
 34MODULE_PARM_DESC(enable, "Enable Sound Blaster soundcard.");
 35module_param_hw_array(port, long, ioport, NULL, 0444);
 36MODULE_PARM_DESC(port, "Port # for SB8 driver.");
 37module_param_hw_array(irq, int, irq, NULL, 0444);
 38MODULE_PARM_DESC(irq, "IRQ # for SB8 driver.");
 39module_param_hw_array(dma8, int, dma, NULL, 0444);
 40MODULE_PARM_DESC(dma8, "8-bit DMA # for SB8 driver.");
 41
 42struct snd_sb8 {
 43	struct resource *fm_res;	/* used to block FM i/o region for legacy cards */
 44	struct snd_sb *chip;
 45};
 46
 47static irqreturn_t snd_sb8_interrupt(int irq, void *dev_id)
 48{
 49	struct snd_sb *chip = dev_id;
 50
 51	if (chip->open & SB_OPEN_PCM) {
 52		return snd_sb8dsp_interrupt(chip);
 53	} else {
 54		return snd_sb8dsp_midi_interrupt(chip);
 55	}
 56}
 57
 58static int snd_sb8_match(struct device *pdev, unsigned int dev)
 59{
 60	if (!enable[dev])
 61		return 0;
 62	if (irq[dev] == SNDRV_AUTO_IRQ) {
 63		dev_err(pdev, "please specify irq\n");
 64		return 0;
 65	}
 66	if (dma8[dev] == SNDRV_AUTO_DMA) {
 67		dev_err(pdev, "please specify dma8\n");
 68		return 0;
 69	}
 70	return 1;
 71}
 72
 73static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 74{
 75	struct snd_sb *chip;
 76	struct snd_card *card;
 77	struct snd_sb8 *acard;
 78	struct snd_opl3 *opl3;
 79	int err;
 80
 81	err = snd_devm_card_new(pdev, index[dev], id[dev], THIS_MODULE,
 82				sizeof(struct snd_sb8), &card);
 83	if (err < 0)
 84		return err;
 85	acard = card->private_data;
 86
 87	/*
 88	 * Block the 0x388 port to avoid PnP conflicts.
 89	 * No need to check this value after request_region,
 90	 * as we never do anything with it.
 91	 */
 92	acard->fm_res = devm_request_region(card->dev, 0x388, 4,
 93					    "SoundBlaster FM");
 94
 95	if (port[dev] != SNDRV_AUTO_PORT) {
 96		err = snd_sbdsp_create(card, port[dev], irq[dev],
 97				       snd_sb8_interrupt, dma8[dev],
 98				       -1, SB_HW_AUTO, &chip);
 99		if (err < 0)
100			return err;
101	} else {
102		/* auto-probe legacy ports */
103		static const unsigned long possible_ports[] = {
104			0x220, 0x240, 0x260,
105		};
106		int i;
107		for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
108			err = snd_sbdsp_create(card, possible_ports[i],
109					       irq[dev],
110					       snd_sb8_interrupt,
111					       dma8[dev],
112					       -1,
113					       SB_HW_AUTO,
114					       &chip);
115			if (err >= 0) {
116				port[dev] = possible_ports[i];
117				break;
118			}
119		}
120		if (i >= ARRAY_SIZE(possible_ports))
121			return -EINVAL;
122	}
123	acard->chip = chip;
124			
125	if (chip->hardware >= SB_HW_16) {
126		if (chip->hardware == SB_HW_ALS100)
127			dev_warn(pdev, "ALS100 chip detected at 0x%lx, try snd-als100 module\n",
128				 port[dev]);
129		else
130			dev_warn(pdev, "SB 16 chip detected at 0x%lx, try snd-sb16 module\n",
131				 port[dev]);
132		return -ENODEV;
133	}
134
135	err = snd_sb8dsp_pcm(chip, 0);
136	if (err < 0)
137		return err;
138
139	err = snd_sbmixer_new(chip);
140	if (err < 0)
141		return err;
142
143	if (chip->hardware == SB_HW_10 || chip->hardware == SB_HW_20) {
144		err = snd_opl3_create(card, chip->port + 8, 0,
145				      OPL3_HW_AUTO, 1, &opl3);
146		if (err < 0)
147			dev_warn(pdev, "sb8: no OPL device at 0x%lx\n", chip->port + 8);
148	} else {
149		err = snd_opl3_create(card, chip->port, chip->port + 2,
150				      OPL3_HW_AUTO, 1, &opl3);
151		if (err < 0) {
152			dev_warn(pdev, "sb8: no OPL device at 0x%lx-0x%lx\n",
153				   chip->port, chip->port + 2);
154		}
155	}
156	if (err >= 0) {
157		err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
158		if (err < 0)
159			return err;
160	}
161
162	err = snd_sb8dsp_midi(chip, 0);
163	if (err < 0)
164		return err;
165
166	strscpy(card->driver, chip->hardware == SB_HW_PRO ? "SB Pro" : "SB8");
167	strscpy(card->shortname, chip->name);
168	sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
169		chip->name,
170		chip->port,
171		irq[dev], dma8[dev]);
172
173	err = snd_card_register(card);
174	if (err < 0)
175		return err;
176
177	dev_set_drvdata(pdev, card);
178	return 0;
179}
180
181#ifdef CONFIG_PM
182static int snd_sb8_suspend(struct device *dev, unsigned int n,
183			   pm_message_t state)
184{
185	struct snd_card *card = dev_get_drvdata(dev);
186	struct snd_sb8 *acard = card->private_data;
187	struct snd_sb *chip = acard->chip;
188
189	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
190	snd_sbmixer_suspend(chip);
191	return 0;
192}
193
194static int snd_sb8_resume(struct device *dev, unsigned int n)
195{
196	struct snd_card *card = dev_get_drvdata(dev);
197	struct snd_sb8 *acard = card->private_data;
198	struct snd_sb *chip = acard->chip;
199
200	snd_sbdsp_reset(chip);
201	snd_sbmixer_resume(chip);
202	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
203	return 0;
204}
205#endif
206
207#define DEV_NAME "sb8"
208
209static struct isa_driver snd_sb8_driver = {
210	.match		= snd_sb8_match,
211	.probe		= snd_sb8_probe,
212#ifdef CONFIG_PM
213	.suspend	= snd_sb8_suspend,
214	.resume		= snd_sb8_resume,
215#endif
216	.driver		= {
217		.name	= DEV_NAME 
218	},
219};
220
221module_isa_driver(snd_sb8_driver, SNDRV_CARDS);