![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1518 lines
39 KiB
C
1518 lines
39 KiB
C
/*
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* Low-level ALSA driver for the ENSONIQ SoundScape PnP
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* Copyright (c) by Chris Rankin
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*
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* This driver was written in part using information obtained from
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* the OSS/Free SoundScape driver, written by Hannu Savolainen.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pnp.h>
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#include <linux/spinlock.h>
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#include <linux/moduleparam.h>
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#include <asm/dma.h>
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#include <sound/core.h>
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#include <sound/hwdep.h>
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#include <sound/cs4231.h>
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#include <sound/mpu401.h>
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#include <sound/initval.h>
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#include <sound/sscape_ioctl.h>
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MODULE_AUTHOR("Chris Rankin");
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MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver");
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MODULE_LICENSE("GPL");
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static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX;
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static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR;
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static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT };
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static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
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static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
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static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA;
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "Description for SoundScape card");
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module_param_array(port, long, NULL, 0444);
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MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
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module_param_array(irq, int, NULL, 0444);
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MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
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module_param_array(mpu_irq, int, NULL, 0444);
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MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
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module_param_array(dma, int, NULL, 0444);
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MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
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#ifdef CONFIG_PNP
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static struct pnp_card_device_id sscape_pnpids[] = {
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{ .id = "ENS3081", .devs = { { "ENS0000" } } },
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{ .id = "" } /* end */
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};
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MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
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#endif
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static snd_card_t *sscape_card[SNDRV_CARDS];
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#define MPU401_IO(i) ((i) + 0)
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#define MIDI_DATA_IO(i) ((i) + 0)
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#define MIDI_CTRL_IO(i) ((i) + 1)
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#define HOST_CTRL_IO(i) ((i) + 2)
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#define HOST_DATA_IO(i) ((i) + 3)
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#define ODIE_ADDR_IO(i) ((i) + 4)
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#define ODIE_DATA_IO(i) ((i) + 5)
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#define CODEC_IO(i) ((i) + 8)
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#define IC_ODIE 1
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#define IC_OPUS 2
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#define RX_READY 0x01
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#define TX_READY 0x02
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#define CMD_ACK 0x80
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#define CMD_SET_MIDI_VOL 0x84
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#define CMD_GET_MIDI_VOL 0x85
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#define CMD_XXX_MIDI_VOL 0x86
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#define CMD_SET_EXTMIDI 0x8a
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#define CMD_GET_EXTMIDI 0x8b
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#define CMD_SET_MT32 0x8c
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#define CMD_GET_MT32 0x8d
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enum GA_REG {
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GA_INTSTAT_REG = 0,
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GA_INTENA_REG,
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GA_DMAA_REG,
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GA_DMAB_REG,
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GA_INTCFG_REG,
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GA_DMACFG_REG,
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GA_CDCFG_REG,
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GA_SMCFGA_REG,
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GA_SMCFGB_REG,
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GA_HMCTL_REG
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};
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#define DMA_8BIT 0x80
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#define AD1845_FREQ_SEL_MSB 0x16
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#define AD1845_FREQ_SEL_LSB 0x17
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struct soundscape {
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spinlock_t lock;
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unsigned io_base;
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int codec_type;
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int ic_type;
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struct resource *io_res;
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cs4231_t *chip;
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mpu401_t *mpu;
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snd_hwdep_t *hw;
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/*
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* The MIDI device won't work until we've loaded
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* its firmware via a hardware-dependent device IOCTL
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*/
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spinlock_t fwlock;
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int hw_in_use;
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unsigned long midi_usage;
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unsigned char midi_vol;
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};
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#define INVALID_IRQ ((unsigned)-1)
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static inline struct soundscape *get_card_soundscape(snd_card_t * c)
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{
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return (struct soundscape *) (c->private_data);
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}
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static inline struct soundscape *get_mpu401_soundscape(mpu401_t * mpu)
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{
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return (struct soundscape *) (mpu->private_data);
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}
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static inline struct soundscape *get_hwdep_soundscape(snd_hwdep_t * hw)
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{
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return (struct soundscape *) (hw->private_data);
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}
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/*
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* Allocates some kernel memory that we can use for DMA.
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* I think this means that the memory has to map to
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* contiguous pages of physical memory.
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*/
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static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size)
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{
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if (buf) {
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if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
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size, buf) < 0) {
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snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
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return NULL;
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}
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}
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return buf;
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}
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/*
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* Release the DMA-able kernel memory ...
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*/
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static void free_dmabuf(struct snd_dma_buffer *buf)
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{
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if (buf && buf->area)
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snd_dma_free_pages(buf);
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}
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/*
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* This function writes to the SoundScape's control registers,
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* but doesn't do any locking. It's up to the caller to do that.
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* This is why this function is "unsafe" ...
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*/
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static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val)
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{
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outb(reg, ODIE_ADDR_IO(io_base));
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outb(val, ODIE_DATA_IO(io_base));
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}
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/*
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* Write to the SoundScape's control registers, and do the
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* necessary locking ...
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*/
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static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val)
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{
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unsigned long flags;
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spin_lock_irqsave(&s->lock, flags);
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sscape_write_unsafe(s->io_base, reg, val);
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spin_unlock_irqrestore(&s->lock, flags);
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}
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/*
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* Read from the SoundScape's control registers, but leave any
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* locking to the caller. This is why the function is "unsafe" ...
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*/
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static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg)
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{
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outb(reg, ODIE_ADDR_IO(io_base));
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return inb(ODIE_DATA_IO(io_base));
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}
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/*
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* Puts the SoundScape into "host" mode, as compared to "MIDI" mode
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*/
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static inline void set_host_mode_unsafe(unsigned io_base)
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{
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outb(0x0, HOST_CTRL_IO(io_base));
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}
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/*
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* Puts the SoundScape into "MIDI" mode, as compared to "host" mode
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*/
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static inline void set_midi_mode_unsafe(unsigned io_base)
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{
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outb(0x3, HOST_CTRL_IO(io_base));
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}
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/*
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* Read the SoundScape's host-mode control register, but leave
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* any locking issues to the caller ...
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*/
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static inline int host_read_unsafe(unsigned io_base)
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{
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int data = -1;
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if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) {
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data = inb(HOST_DATA_IO(io_base));
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}
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return data;
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}
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/*
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* Read the SoundScape's host-mode control register, performing
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* a limited amount of busy-waiting if the register isn't ready.
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* Also leaves all locking-issues to the caller ...
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*/
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static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
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{
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int data;
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while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
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udelay(100);
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--timeout;
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} /* while */
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return data;
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}
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/*
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* Write to the SoundScape's host-mode control registers, but
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* leave any locking issues to the caller ...
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*/
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static inline int host_write_unsafe(unsigned io_base, unsigned char data)
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{
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if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
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outb(data, HOST_DATA_IO(io_base));
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return 1;
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}
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return 0;
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}
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/*
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* Write to the SoundScape's host-mode control registers, performing
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* a limited amount of busy-waiting if the register isn't ready.
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* Also leaves all locking-issues to the caller ...
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*/
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static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
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unsigned timeout)
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{
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int err;
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while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
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udelay(100);
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--timeout;
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} /* while */
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return err;
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}
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/*
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* Check that the MIDI subsystem is operational. If it isn't,
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* then we will hang the computer if we try to use it ...
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*
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* NOTE: This check is based upon observation, not documentation.
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*/
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static inline int verify_mpu401(const mpu401_t * mpu)
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{
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return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80);
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}
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/*
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* This is apparently the standard way to initailise an MPU-401
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*/
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static inline void initialise_mpu401(const mpu401_t * mpu)
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{
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outb(0, MIDI_DATA_IO(mpu->port));
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}
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/*
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* Tell the SoundScape to activate the AD1845 chip (I think).
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* The AD1845 detection fails if we *don't* do this, so I
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* think that this is a good idea ...
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*/
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static inline void activate_ad1845_unsafe(unsigned io_base)
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{
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sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10);
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sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
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}
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/*
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* Do the necessary ALSA-level cleanup to deallocate our driver ...
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*/
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static void soundscape_free(snd_card_t * c)
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{
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register struct soundscape *sscape = get_card_soundscape(c);
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release_resource(sscape->io_res);
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kfree_nocheck(sscape->io_res);
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free_dma(sscape->chip->dma1);
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}
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/*
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* Put this process into an idle wait-state for a certain number
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* of "jiffies". The process can almost certainly be rescheduled
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* while we're waiting, and so we must NOT be holding any spinlocks
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* when we call this function. If we are then we risk DEADLOCK in
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* SMP (Ha!) or pre-emptible kernels.
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*/
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static inline void sleep(long jiffs, int state)
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{
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set_current_state(state);
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schedule_timeout(jiffs);
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}
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/*
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* Tell the SoundScape to begin a DMA tranfer using the given channel.
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* All locking issues are left to the caller.
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*/
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static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
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{
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sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01);
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sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe);
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}
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/*
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* Wait for a DMA transfer to complete. This is a "limited busy-wait",
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* and all locking issues are left to the caller.
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*/
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static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout)
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{
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while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
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udelay(100);
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--timeout;
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} /* while */
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return (sscape_read_unsafe(io_base, reg) & 0x01);
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}
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/*
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* Wait for the On-Board Processor to return its start-up
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* acknowledgement sequence. This wait is too long for
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* us to perform "busy-waiting", and so we must sleep.
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* This in turn means that we must not be holding any
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* spinlocks when we call this function.
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*/
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static int obp_startup_ack(struct soundscape *s, unsigned timeout)
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{
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while (timeout != 0) {
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unsigned long flags;
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unsigned char x;
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sleep(1, TASK_INTERRUPTIBLE);
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spin_lock_irqsave(&s->lock, flags);
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x = inb(HOST_DATA_IO(s->io_base));
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spin_unlock_irqrestore(&s->lock, flags);
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if ((x & 0xfe) == 0xfe)
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return 1;
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--timeout;
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} /* while */
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return 0;
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}
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/*
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* Wait for the host to return its start-up acknowledgement
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* sequence. This wait is too long for us to perform
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* "busy-waiting", and so we must sleep. This in turn means
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* that we must not be holding any spinlocks when we call
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* this function.
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*/
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static int host_startup_ack(struct soundscape *s, unsigned timeout)
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{
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while (timeout != 0) {
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unsigned long flags;
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unsigned char x;
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sleep(1, TASK_INTERRUPTIBLE);
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spin_lock_irqsave(&s->lock, flags);
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x = inb(HOST_DATA_IO(s->io_base));
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spin_unlock_irqrestore(&s->lock, flags);
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if (x == 0xfe)
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return 1;
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--timeout;
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} /* while */
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return 0;
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}
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/*
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* Upload a byte-stream into the SoundScape using DMA channel A.
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*/
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static int upload_dma_data(struct soundscape *s,
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const unsigned char __user *data,
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size_t size)
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{
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unsigned long flags;
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struct snd_dma_buffer dma;
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int ret;
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if (!get_dmabuf(&dma, PAGE_ALIGN(size)))
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return -ENOMEM;
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spin_lock_irqsave(&s->lock, flags);
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/*
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* Reset the board ...
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*/
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sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f);
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/*
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* Enable the DMA channels and configure them ...
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*/
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sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50);
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sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT);
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sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
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/*
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* Take the board out of reset ...
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*/
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sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80);
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/*
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* Upload the user's data (firmware?) to the SoundScape
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* board through the DMA channel ...
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*/
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while (size != 0) {
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unsigned long len;
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|
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/*
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* Apparently, copying to/from userspace can sleep.
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* We are therefore forbidden from holding any
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* spinlocks while we copy ...
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*/
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spin_unlock_irqrestore(&s->lock, flags);
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/*
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* Remember that the data that we want to DMA
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* comes from USERSPACE. We have already verified
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* the userspace pointer ...
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*/
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len = min(size, dma.bytes);
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len -= __copy_from_user(dma.area, data, len);
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data += len;
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size -= len;
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/*
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* Grab that spinlock again, now that we've
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* finished copying!
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*/
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spin_lock_irqsave(&s->lock, flags);
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snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
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sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
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if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
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/*
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* Don't forget to release this spinlock we're holding ...
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*/
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spin_unlock_irqrestore(&s->lock, flags);
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snd_printk(KERN_ERR "sscape: DMA upload has timed out\n");
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ret = -EAGAIN;
|
|
goto _release_dma;
|
|
}
|
|
} /* while */
|
|
|
|
set_host_mode_unsafe(s->io_base);
|
|
|
|
/*
|
|
* Boot the board ... (I think)
|
|
*/
|
|
sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
|
|
/*
|
|
* If all has gone well, then the board should acknowledge
|
|
* the new upload and tell us that it has rebooted OK. We
|
|
* give it 5 seconds (max) ...
|
|
*/
|
|
ret = 0;
|
|
if (!obp_startup_ack(s, 5)) {
|
|
snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n");
|
|
ret = -EAGAIN;
|
|
} else if (!host_startup_ack(s, 5)) {
|
|
snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n");
|
|
ret = -EAGAIN;
|
|
}
|
|
|
|
_release_dma:
|
|
/*
|
|
* NOTE!!! We are NOT holding any spinlocks at this point !!!
|
|
*/
|
|
sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40));
|
|
free_dmabuf(&dma);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Upload the bootblock(?) into the SoundScape. The only
|
|
* purpose of this block of code seems to be to tell
|
|
* us which version of the microcode we should be using.
|
|
*
|
|
* NOTE: The boot-block data resides in USER-SPACE!!!
|
|
* However, we have already verified its memory
|
|
* addresses by the time we get here.
|
|
*/
|
|
static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb)
|
|
{
|
|
unsigned long flags;
|
|
int data = 0;
|
|
int ret;
|
|
|
|
ret = upload_dma_data(sscape, bb->code, sizeof(bb->code));
|
|
|
|
spin_lock_irqsave(&sscape->lock, flags);
|
|
if (ret == 0) {
|
|
data = host_read_ctrl_unsafe(sscape->io_base, 100);
|
|
}
|
|
set_midi_mode_unsafe(sscape->io_base);
|
|
spin_unlock_irqrestore(&sscape->lock, flags);
|
|
|
|
if (ret == 0) {
|
|
if (data < 0) {
|
|
snd_printk(KERN_ERR "sscape: timeout reading firmware version\n");
|
|
ret = -EAGAIN;
|
|
}
|
|
else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) {
|
|
ret = -EFAULT;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Upload the microcode into the SoundScape. The
|
|
* microcode is 64K of data, and if we try to copy
|
|
* it into a local variable then we will SMASH THE
|
|
* KERNEL'S STACK! We therefore leave it in USER
|
|
* SPACE, and save ourselves from copying it at all.
|
|
*/
|
|
static int sscape_upload_microcode(struct soundscape *sscape,
|
|
const struct sscape_microcode __user *mc)
|
|
{
|
|
unsigned long flags;
|
|
char __user *code;
|
|
int err;
|
|
|
|
/*
|
|
* We are going to have to copy this data into a special
|
|
* DMA-able buffer before we can upload it. We shall therefore
|
|
* just check that the data pointer is valid for now.
|
|
*
|
|
* NOTE: This buffer is 64K long! That's WAY too big to
|
|
* copy into a stack-temporary anyway.
|
|
*/
|
|
if ( get_user(code, &mc->code) ||
|
|
!access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) )
|
|
return -EFAULT;
|
|
|
|
if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) {
|
|
snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n");
|
|
}
|
|
|
|
spin_lock_irqsave(&sscape->lock, flags);
|
|
set_midi_mode_unsafe(sscape->io_base);
|
|
spin_unlock_irqrestore(&sscape->lock, flags);
|
|
|
|
initialise_mpu401(sscape->mpu);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Hardware-specific device functions, to implement special
|
|
* IOCTLs for the SoundScape card. This is how we upload
|
|
* the microcode into the card, for example, and so we
|
|
* must ensure that no two processes can open this device
|
|
* simultaneously, and that we can't open it at all if
|
|
* someone is using the MIDI device.
|
|
*/
|
|
static int sscape_hw_open(snd_hwdep_t * hw, struct file *file)
|
|
{
|
|
register struct soundscape *sscape = get_hwdep_soundscape(hw);
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
spin_lock_irqsave(&sscape->fwlock, flags);
|
|
|
|
if ((sscape->midi_usage != 0) || sscape->hw_in_use) {
|
|
err = -EBUSY;
|
|
} else {
|
|
sscape->hw_in_use = 1;
|
|
err = 0;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sscape->fwlock, flags);
|
|
return err;
|
|
}
|
|
|
|
static int sscape_hw_release(snd_hwdep_t * hw, struct file *file)
|
|
{
|
|
register struct soundscape *sscape = get_hwdep_soundscape(hw);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sscape->fwlock, flags);
|
|
sscape->hw_in_use = 0;
|
|
spin_unlock_irqrestore(&sscape->fwlock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int sscape_hw_ioctl(snd_hwdep_t * hw, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct soundscape *sscape = get_hwdep_soundscape(hw);
|
|
int err = -EBUSY;
|
|
|
|
switch (cmd) {
|
|
case SND_SSCAPE_LOAD_BOOTB:
|
|
{
|
|
register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg;
|
|
|
|
/*
|
|
* We are going to have to copy this data into a special
|
|
* DMA-able buffer before we can upload it. We shall therefore
|
|
* just check that the data pointer is valid for now ...
|
|
*/
|
|
if ( !access_ok(VERIFY_READ, bb->code, sizeof(bb->code)) )
|
|
return -EFAULT;
|
|
|
|
/*
|
|
* Now check that we can write the firmware version number too...
|
|
*/
|
|
if ( !access_ok(VERIFY_WRITE, &bb->version, sizeof(bb->version)) )
|
|
return -EFAULT;
|
|
|
|
err = sscape_upload_bootblock(sscape, bb);
|
|
}
|
|
break;
|
|
|
|
case SND_SSCAPE_LOAD_MCODE:
|
|
{
|
|
register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg;
|
|
|
|
err = sscape_upload_microcode(sscape, mc);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
} /* switch */
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Mixer control for the SoundScape's MIDI device.
|
|
*/
|
|
static int sscape_midi_info(snd_kcontrol_t * ctl,
|
|
snd_ctl_elem_info_t * uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
|
uinfo->count = 1;
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 127;
|
|
return 0;
|
|
}
|
|
|
|
static int sscape_midi_get(snd_kcontrol_t * kctl,
|
|
snd_ctl_elem_value_t * uctl)
|
|
{
|
|
cs4231_t *chip = snd_kcontrol_chip(kctl);
|
|
snd_card_t *card = chip->card;
|
|
register struct soundscape *s = get_card_soundscape(card);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
set_host_mode_unsafe(s->io_base);
|
|
|
|
if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) {
|
|
uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100);
|
|
}
|
|
|
|
set_midi_mode_unsafe(s->io_base);
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int sscape_midi_put(snd_kcontrol_t * kctl,
|
|
snd_ctl_elem_value_t * uctl)
|
|
{
|
|
cs4231_t *chip = snd_kcontrol_chip(kctl);
|
|
snd_card_t *card = chip->card;
|
|
register struct soundscape *s = get_card_soundscape(card);
|
|
unsigned long flags;
|
|
int change;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
/*
|
|
* We need to put the board into HOST mode before we
|
|
* can send any volume-changing HOST commands ...
|
|
*/
|
|
set_host_mode_unsafe(s->io_base);
|
|
|
|
/*
|
|
* To successfully change the MIDI volume setting, you seem to
|
|
* have to write a volume command, write the new volume value,
|
|
* and then perform another volume-related command. Perhaps the
|
|
* first command is an "open" and the second command is a "close"?
|
|
*/
|
|
if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) {
|
|
change = 0;
|
|
goto __skip_change;
|
|
}
|
|
change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
|
|
&& host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100)
|
|
&& host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100));
|
|
__skip_change:
|
|
|
|
/*
|
|
* Take the board out of HOST mode and back into MIDI mode ...
|
|
*/
|
|
set_midi_mode_unsafe(s->io_base);
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return change;
|
|
}
|
|
|
|
static snd_kcontrol_new_t midi_mixer_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "MIDI",
|
|
.info = sscape_midi_info,
|
|
.get = sscape_midi_get,
|
|
.put = sscape_midi_put
|
|
};
|
|
|
|
/*
|
|
* The SoundScape can use two IRQs from a possible set of four.
|
|
* These IRQs are encoded as bit patterns so that they can be
|
|
* written to the control registers.
|
|
*/
|
|
static unsigned __devinit get_irq_config(int irq)
|
|
{
|
|
static const int valid_irq[] = { 9, 5, 7, 10 };
|
|
unsigned cfg;
|
|
|
|
for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) {
|
|
if (irq == valid_irq[cfg])
|
|
return cfg;
|
|
} /* for */
|
|
|
|
return INVALID_IRQ;
|
|
}
|
|
|
|
|
|
/*
|
|
* Perform certain arcane port-checks to see whether there
|
|
* is a SoundScape board lurking behind the given ports.
|
|
*/
|
|
static int __devinit detect_sscape(struct soundscape *s)
|
|
{
|
|
unsigned long flags;
|
|
unsigned d;
|
|
int retval = 0;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
/*
|
|
* The following code is lifted from the original OSS driver,
|
|
* and as I don't have a datasheet I cannot really comment
|
|
* on what it is doing...
|
|
*/
|
|
if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
|
|
goto _done;
|
|
|
|
d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
|
|
if ((d & 0x80) != 0)
|
|
goto _done;
|
|
|
|
if (d == 0) {
|
|
s->codec_type = 1;
|
|
s->ic_type = IC_ODIE;
|
|
} else if ((d & 0x60) != 0) {
|
|
s->codec_type = 2;
|
|
s->ic_type = IC_OPUS;
|
|
} else
|
|
goto _done;
|
|
|
|
outb(0xfa, ODIE_ADDR_IO(s->io_base));
|
|
if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
|
|
goto _done;
|
|
|
|
outb(0xfe, ODIE_ADDR_IO(s->io_base));
|
|
if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
|
|
goto _done;
|
|
if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e)
|
|
goto _done;
|
|
|
|
/*
|
|
* SoundScape successfully detected!
|
|
*/
|
|
retval = 1;
|
|
|
|
_done:
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* ALSA callback function, called when attempting to open the MIDI device.
|
|
* Check that the MIDI firmware has been loaded, because we don't want
|
|
* to crash the machine. Also check that someone isn't using the hardware
|
|
* IOCTL device.
|
|
*/
|
|
static int mpu401_open(mpu401_t * mpu)
|
|
{
|
|
int err;
|
|
|
|
if (!verify_mpu401(mpu)) {
|
|
snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n");
|
|
err = -ENODEV;
|
|
} else {
|
|
register struct soundscape *sscape = get_mpu401_soundscape(mpu);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sscape->fwlock, flags);
|
|
|
|
if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) {
|
|
err = -EBUSY;
|
|
} else {
|
|
++(sscape->midi_usage);
|
|
err = 0;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sscape->fwlock, flags);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void mpu401_close(mpu401_t * mpu)
|
|
{
|
|
register struct soundscape *sscape = get_mpu401_soundscape(mpu);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sscape->fwlock, flags);
|
|
--(sscape->midi_usage);
|
|
spin_unlock_irqrestore(&sscape->fwlock, flags);
|
|
}
|
|
|
|
/*
|
|
* Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
|
|
*/
|
|
static int __devinit create_mpu401(snd_card_t * card, int devnum, unsigned long port, int irq)
|
|
{
|
|
struct soundscape *sscape = get_card_soundscape(card);
|
|
snd_rawmidi_t *rawmidi;
|
|
int err;
|
|
|
|
#define MPU401_SHARE_HARDWARE 1
|
|
if ((err = snd_mpu401_uart_new(card, devnum,
|
|
MPU401_HW_MPU401,
|
|
port, MPU401_SHARE_HARDWARE,
|
|
irq, SA_INTERRUPT,
|
|
&rawmidi)) == 0) {
|
|
mpu401_t *mpu = (mpu401_t *) rawmidi->private_data;
|
|
mpu->open_input = mpu401_open;
|
|
mpu->open_output = mpu401_open;
|
|
mpu->close_input = mpu401_close;
|
|
mpu->close_output = mpu401_close;
|
|
mpu->private_data = sscape;
|
|
sscape->mpu = mpu;
|
|
|
|
initialise_mpu401(mpu);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Override for the CS4231 playback format function.
|
|
* The AD1845 has much simpler format and rate selection.
|
|
*/
|
|
static void ad1845_playback_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format)
|
|
{
|
|
unsigned long flags;
|
|
unsigned rate = params_rate(params);
|
|
|
|
/*
|
|
* The AD1845 can't handle sample frequencies
|
|
* outside of 4 kHZ to 50 kHZ
|
|
*/
|
|
if (rate > 50000)
|
|
rate = 50000;
|
|
else if (rate < 4000)
|
|
rate = 4000;
|
|
|
|
spin_lock_irqsave(&chip->reg_lock, flags);
|
|
|
|
/*
|
|
* Program the AD1845 correctly for the playback stream.
|
|
* Note that we do NOT need to toggle the MCE bit because
|
|
* the PLAYBACK_ENABLE bit of the Interface Configuration
|
|
* register is set.
|
|
*
|
|
* NOTE: We seem to need to write to the MSB before the LSB
|
|
* to get the correct sample frequency.
|
|
*/
|
|
snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0));
|
|
snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
|
|
snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
|
|
|
|
spin_unlock_irqrestore(&chip->reg_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Override for the CS4231 capture format function.
|
|
* The AD1845 has much simpler format and rate selection.
|
|
*/
|
|
static void ad1845_capture_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format)
|
|
{
|
|
unsigned long flags;
|
|
unsigned rate = params_rate(params);
|
|
|
|
/*
|
|
* The AD1845 can't handle sample frequencies
|
|
* outside of 4 kHZ to 50 kHZ
|
|
*/
|
|
if (rate > 50000)
|
|
rate = 50000;
|
|
else if (rate < 4000)
|
|
rate = 4000;
|
|
|
|
spin_lock_irqsave(&chip->reg_lock, flags);
|
|
|
|
/*
|
|
* Program the AD1845 correctly for the playback stream.
|
|
* Note that we do NOT need to toggle the MCE bit because
|
|
* the CAPTURE_ENABLE bit of the Interface Configuration
|
|
* register is set.
|
|
*
|
|
* NOTE: We seem to need to write to the MSB before the LSB
|
|
* to get the correct sample frequency.
|
|
*/
|
|
snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0));
|
|
snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
|
|
snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
|
|
|
|
spin_unlock_irqrestore(&chip->reg_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Create an AD1845 PCM subdevice on the SoundScape. The AD1845
|
|
* is very much like a CS4231, with a few extra bits. We will
|
|
* try to support at least some of the extra bits by overriding
|
|
* some of the CS4231 callback.
|
|
*/
|
|
static int __devinit create_ad1845(snd_card_t * card, unsigned port, int irq, int dma1)
|
|
{
|
|
register struct soundscape *sscape = get_card_soundscape(card);
|
|
cs4231_t *chip;
|
|
int err;
|
|
|
|
#define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2)
|
|
/*
|
|
* The AD1845 PCM device is only half-duplex, and so
|
|
* we only give it one DMA channel ...
|
|
*/
|
|
if ((err = snd_cs4231_create(card,
|
|
port, -1, irq, dma1, dma1,
|
|
CS4231_HW_DETECT,
|
|
CS4231_HWSHARE_DMA1, &chip)) == 0) {
|
|
unsigned long flags;
|
|
snd_pcm_t *pcm;
|
|
|
|
#define AD1845_FREQ_SEL_ENABLE 0x08
|
|
|
|
#define AD1845_PWR_DOWN_CTRL 0x1b
|
|
#define AD1845_CRYS_CLOCK_SEL 0x1d
|
|
|
|
/*
|
|
* It turns out that the PLAYBACK_ENABLE bit is set
|
|
* by the lowlevel driver ...
|
|
*
|
|
#define AD1845_IFACE_CONFIG \
|
|
(CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE)
|
|
snd_cs4231_mce_up(chip);
|
|
spin_lock_irqsave(&chip->reg_lock, flags);
|
|
snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG);
|
|
spin_unlock_irqrestore(&chip->reg_lock, flags);
|
|
snd_cs4231_mce_down(chip);
|
|
*/
|
|
|
|
/*
|
|
* The input clock frequency on the SoundScape must
|
|
* be 14.31818 MHz, because we must set this register
|
|
* to get the playback to sound correct ...
|
|
*/
|
|
snd_cs4231_mce_up(chip);
|
|
spin_lock_irqsave(&chip->reg_lock, flags);
|
|
snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20);
|
|
spin_unlock_irqrestore(&chip->reg_lock, flags);
|
|
snd_cs4231_mce_down(chip);
|
|
|
|
/*
|
|
* More custom configuration:
|
|
* a) select "mode 2", and provide a current drive of 8 mA
|
|
* b) enable frequency selection (for capture/playback)
|
|
*/
|
|
spin_lock_irqsave(&chip->reg_lock, flags);
|
|
snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10));
|
|
snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE);
|
|
spin_unlock_irqrestore(&chip->reg_lock, flags);
|
|
|
|
if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) {
|
|
snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n");
|
|
goto _error;
|
|
}
|
|
|
|
if ((err = snd_cs4231_mixer(chip)) < 0) {
|
|
snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n");
|
|
goto _error;
|
|
}
|
|
|
|
if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) {
|
|
snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n");
|
|
goto _error;
|
|
}
|
|
|
|
strcpy(card->driver, "SoundScape");
|
|
strcpy(card->shortname, pcm->name);
|
|
snprintf(card->longname, sizeof(card->longname),
|
|
"%s at 0x%lx, IRQ %d, DMA %d\n",
|
|
pcm->name, chip->port, chip->irq, chip->dma1);
|
|
chip->set_playback_format = ad1845_playback_format;
|
|
chip->set_capture_format = ad1845_capture_format;
|
|
sscape->chip = chip;
|
|
}
|
|
|
|
_error:
|
|
return err;
|
|
}
|
|
|
|
|
|
struct params
|
|
{
|
|
int index;
|
|
const char *id;
|
|
unsigned port;
|
|
int irq;
|
|
int mpu_irq;
|
|
int dma1;
|
|
};
|
|
|
|
|
|
static inline struct params*
|
|
init_params(struct params *params,
|
|
int index,
|
|
const char *id,
|
|
unsigned port,
|
|
int irq,
|
|
int mpu_irq,
|
|
int dma1)
|
|
{
|
|
params->index = index;
|
|
params->id = id;
|
|
params->port = port;
|
|
params->irq = irq;
|
|
params->mpu_irq = mpu_irq;
|
|
params->dma1 = (dma1 & 0x03);
|
|
|
|
return params;
|
|
}
|
|
|
|
|
|
/*
|
|
* Create an ALSA soundcard entry for the SoundScape, using
|
|
* the given list of port, IRQ and DMA resources.
|
|
*/
|
|
static int __devinit create_sscape(const struct params *params, snd_card_t **rcardp)
|
|
{
|
|
snd_card_t *card;
|
|
register struct soundscape *sscape;
|
|
register unsigned dma_cfg;
|
|
unsigned irq_cfg;
|
|
unsigned mpu_irq_cfg;
|
|
struct resource *io_res;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
/*
|
|
* Check that the user didn't pass us garbage data ...
|
|
*/
|
|
irq_cfg = get_irq_config(params->irq);
|
|
if (irq_cfg == INVALID_IRQ) {
|
|
snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->irq);
|
|
return -ENXIO;
|
|
}
|
|
|
|
mpu_irq_cfg = get_irq_config(params->mpu_irq);
|
|
if (mpu_irq_cfg == INVALID_IRQ) {
|
|
printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->mpu_irq);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Grab IO ports that we will need to probe so that we
|
|
* can detect and control this hardware ...
|
|
*/
|
|
if ((io_res = request_region(params->port, 8, "SoundScape")) == NULL) {
|
|
snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", params->port);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* Grab both DMA channels (OK, only one for now) ...
|
|
*/
|
|
if ((err = request_dma(params->dma1, "SoundScape")) < 0) {
|
|
snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", params->dma1);
|
|
goto _release_region;
|
|
}
|
|
|
|
/*
|
|
* Create a new ALSA sound card entry, in anticipation
|
|
* of detecting our hardware ...
|
|
*/
|
|
if ((card = snd_card_new(params->index, params->id, THIS_MODULE, sizeof(struct soundscape))) == NULL) {
|
|
err = -ENOMEM;
|
|
goto _release_dma;
|
|
}
|
|
|
|
sscape = get_card_soundscape(card);
|
|
spin_lock_init(&sscape->lock);
|
|
spin_lock_init(&sscape->fwlock);
|
|
sscape->io_res = io_res;
|
|
sscape->io_base = params->port;
|
|
|
|
if (!detect_sscape(sscape)) {
|
|
printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base);
|
|
err = -ENODEV;
|
|
goto _release_card;
|
|
}
|
|
|
|
printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n",
|
|
sscape->io_base, params->irq, params->dma1);
|
|
|
|
/*
|
|
* Now create the hardware-specific device so that we can
|
|
* load the microcode into the on-board processor.
|
|
* We cannot use the MPU-401 MIDI system until this firmware
|
|
* has been loaded into the card.
|
|
*/
|
|
if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) {
|
|
printk(KERN_ERR "sscape: Failed to create firmware device\n");
|
|
goto _release_card;
|
|
}
|
|
strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name));
|
|
sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0';
|
|
sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE;
|
|
sscape->hw->ops.open = sscape_hw_open;
|
|
sscape->hw->ops.release = sscape_hw_release;
|
|
sscape->hw->ops.ioctl = sscape_hw_ioctl;
|
|
sscape->hw->private_data = sscape;
|
|
|
|
/*
|
|
* Tell the on-board devices where their resources are (I think -
|
|
* I can't be sure without a datasheet ... So many magic values!)
|
|
*/
|
|
spin_lock_irqsave(&sscape->lock, flags);
|
|
|
|
activate_ad1845_unsafe(sscape->io_base);
|
|
|
|
sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */
|
|
sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
|
|
sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
|
|
|
|
/*
|
|
* Enable and configure the DMA channels ...
|
|
*/
|
|
sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
|
|
dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40);
|
|
sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
|
|
sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
|
|
|
|
sscape_write_unsafe(sscape->io_base,
|
|
GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg);
|
|
sscape_write_unsafe(sscape->io_base,
|
|
GA_CDCFG_REG, 0x09 | DMA_8BIT | (params->dma1 << 4) | (irq_cfg << 1));
|
|
|
|
spin_unlock_irqrestore(&sscape->lock, flags);
|
|
|
|
/*
|
|
* We have now enabled the codec chip, and so we should
|
|
* detect the AD1845 device ...
|
|
*/
|
|
if ((err = create_ad1845(card, CODEC_IO(params->port), params->irq, params->dma1)) < 0) {
|
|
printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n",
|
|
CODEC_IO(params->port), params->irq);
|
|
goto _release_card;
|
|
}
|
|
#define MIDI_DEVNUM 0
|
|
if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(params->port), params->mpu_irq)) < 0) {
|
|
printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n",
|
|
MPU401_IO(params->port));
|
|
goto _release_card;
|
|
}
|
|
|
|
/*
|
|
* Enable the master IRQ ...
|
|
*/
|
|
sscape_write(sscape, GA_INTENA_REG, 0x80);
|
|
|
|
if ((err = snd_card_register(card)) < 0) {
|
|
printk(KERN_ERR "sscape: Failed to register sound card\n");
|
|
goto _release_card;
|
|
}
|
|
|
|
/*
|
|
* Initialize mixer
|
|
*/
|
|
sscape->midi_vol = 0;
|
|
host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100);
|
|
host_write_ctrl_unsafe(sscape->io_base, 0, 100);
|
|
host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100);
|
|
|
|
/*
|
|
* Now that we have successfully created this sound card,
|
|
* it is safe to store the pointer.
|
|
* NOTE: we only register the sound card's "destructor"
|
|
* function now that our "constructor" has completed.
|
|
*/
|
|
card->private_free = soundscape_free;
|
|
*rcardp = card;
|
|
|
|
return 0;
|
|
|
|
_release_card:
|
|
snd_card_free(card);
|
|
|
|
_release_dma:
|
|
free_dma(params->dma1);
|
|
|
|
_release_region:
|
|
release_resource(io_res);
|
|
kfree_nocheck(io_res);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int sscape_cards __devinitdata;
|
|
static struct params sscape_params[SNDRV_CARDS] __devinitdata;
|
|
|
|
#ifdef CONFIG_PNP
|
|
static inline int __devinit get_next_autoindex(int i)
|
|
{
|
|
while ((i < SNDRV_CARDS) && (port[i] != SNDRV_AUTO_PORT)) {
|
|
++i;
|
|
} /* while */
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
static inline int __devinit is_port_known(unsigned io, struct params *params, int cards)
|
|
{
|
|
while (--cards >= 0) {
|
|
if (params[cards].port == io)
|
|
return 1;
|
|
} /* while */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
|
|
const struct pnp_card_device_id *pid)
|
|
{
|
|
struct pnp_dev *dev;
|
|
static int idx = 0;
|
|
int ret;
|
|
|
|
/*
|
|
* Allow this function to fail *quietly* if all the ISA PnP
|
|
* devices were configured using module parameters instead.
|
|
*/
|
|
if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS) {
|
|
return -ENOSPC;
|
|
}
|
|
|
|
/*
|
|
* We have found a candidate ISA PnP card. Now we
|
|
* have to check that it has the devices that we
|
|
* expect it to have.
|
|
*
|
|
* We will NOT try and autoconfigure all of the resources
|
|
* needed and then activate the card as we are assuming that
|
|
* has already been done at boot-time using /proc/isapnp.
|
|
* We shall simply try to give each active card the resources
|
|
* that it wants. This is a sensible strategy for a modular
|
|
* system where unused modules are unloaded regularly.
|
|
*
|
|
* This strategy is utterly useless if we compile the driver
|
|
* into the kernel, of course.
|
|
*/
|
|
// printk(KERN_INFO "sscape: %s\n", card->name);
|
|
|
|
/*
|
|
* Check that we still have room for another sound card ...
|
|
*/
|
|
if (sscape_cards >= SNDRV_CARDS) {
|
|
printk(KERN_ERR "sscape: No room for another ALSA device\n");
|
|
return -ENOSPC;
|
|
}
|
|
|
|
ret = -ENODEV;
|
|
|
|
dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
|
|
if (dev) {
|
|
struct params *this;
|
|
if (!pnp_is_active(dev)) {
|
|
if (pnp_activate_dev(dev) < 0) {
|
|
printk(KERN_INFO "sscape: device is inactive\n");
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
/*
|
|
* Read the correct parameters off the ISA PnP bus ...
|
|
*/
|
|
this = init_params(&sscape_params[sscape_cards],
|
|
index[idx],
|
|
id[idx],
|
|
pnp_port_start(dev, 0),
|
|
pnp_irq(dev, 0),
|
|
pnp_irq(dev, 1),
|
|
pnp_dma(dev, 0));
|
|
|
|
/*
|
|
* Do we know about this sound card already?
|
|
*/
|
|
if ( !is_port_known(this->port, sscape_params, sscape_cards) ) {
|
|
snd_card_t *card;
|
|
|
|
ret = create_sscape(this, &card);
|
|
if (ret < 0)
|
|
return ret;
|
|
snd_card_set_dev(card, &pcard->card->dev);
|
|
pnp_set_card_drvdata(pcard, card);
|
|
++sscape_cards;
|
|
++idx;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard)
|
|
{
|
|
snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard);
|
|
|
|
pnp_set_card_drvdata(pcard, NULL);
|
|
snd_card_disconnect(card);
|
|
snd_card_free_in_thread(card);
|
|
}
|
|
|
|
static struct pnp_card_driver sscape_pnpc_driver = {
|
|
.flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
|
|
.name = "sscape",
|
|
.id_table = sscape_pnpids,
|
|
.probe = sscape_pnp_detect,
|
|
.remove = __devexit_p(sscape_pnp_remove),
|
|
};
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
static int __init sscape_manual_probe(struct params *params)
|
|
{
|
|
int ret;
|
|
unsigned i;
|
|
snd_card_t *card;
|
|
|
|
for (i = 0; i < SNDRV_CARDS; ++i) {
|
|
/*
|
|
* We do NOT probe for ports.
|
|
* If we're not given a port number for this
|
|
* card then we completely ignore this line
|
|
* of parameters.
|
|
*/
|
|
if (port[i] == SNDRV_AUTO_PORT)
|
|
continue;
|
|
|
|
/*
|
|
* Make sure we were given ALL of the other parameters.
|
|
*/
|
|
if ( (irq[i] == SNDRV_AUTO_IRQ) ||
|
|
(mpu_irq[i] == SNDRV_AUTO_IRQ) ||
|
|
(dma[i] == SNDRV_AUTO_DMA) ) {
|
|
printk(KERN_INFO
|
|
"sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* This cards looks OK ...
|
|
*/
|
|
init_params(params, index[i], id[i], port[i], irq[i], mpu_irq[i], dma[i]);
|
|
|
|
ret = create_sscape(params, &card);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
sscape_card[sscape_cards] = card;
|
|
params++;
|
|
sscape_cards++;
|
|
} /* for */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void sscape_exit(void)
|
|
{
|
|
unsigned i;
|
|
|
|
#ifdef CONFIG_PNP
|
|
pnp_unregister_card_driver(&sscape_pnpc_driver);
|
|
#endif
|
|
for (i = 0; i < ARRAY_SIZE(sscape_card); ++i) {
|
|
snd_card_free(sscape_card[i]);
|
|
} /* for */
|
|
}
|
|
|
|
|
|
static int __init sscape_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* First check whether we were passed any parameters.
|
|
* These MUST take precedence over ANY automatic way
|
|
* of allocating cards, because the operator is
|
|
* S-P-E-L-L-I-N-G it out for us...
|
|
*/
|
|
ret = sscape_manual_probe(sscape_params);
|
|
if (ret < 0) {
|
|
int i;
|
|
for (i = 0; i < sscape_cards; ++i)
|
|
snd_card_free(sscape_card[i]);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PNP
|
|
if (sscape_cards < SNDRV_CARDS) {
|
|
ret = pnp_register_card_driver(&sscape_pnpc_driver);
|
|
if (ret < 0) {
|
|
sscape_exit();
|
|
return ret;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(sscape_init);
|
|
module_exit(sscape_exit);
|