/* * ALSA modem driver for VIA VT82xx (South Bridge) * * VT82C686A/B/C, VT8233A/C, VT8235 * * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz> * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com> * 2002 Takashi Iwai <tiwai@suse.de> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ /* * Changes: * * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org> * Modified from original audio driver 'via82xx.c' to support AC97 * modems. */ #include <asm/io.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/moduleparam.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/info.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #if 0 #define POINTER_DEBUG #endif MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); MODULE_DESCRIPTION("VIA VT82xx modem"); MODULE_LICENSE("GPL"); MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}"); static int index = -2; /* Exclude the first card */ static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ static int ac97_clock = 48000; module_param(index, int, 0444); MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge."); module_param(id, charp, 0444); MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge."); module_param(ac97_clock, int, 0444); MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz)."); /* just for backward compatibility */ static int enable; module_param(enable, bool, 0444); /* * Direct registers */ #define VIAREG(via, x) ((via)->port + VIA_REG_##x) #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x) /* common offsets */ #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */ #define VIA_REG_STAT_ACTIVE 0x80 /* RO */ #define VIA_REG_STAT_PAUSED 0x40 /* RO */ #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */ #define VIA_REG_STAT_STOPPED 0x04 /* RWC */ #define VIA_REG_STAT_EOL 0x02 /* RWC */ #define VIA_REG_STAT_FLAG 0x01 /* RWC */ #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */ #define VIA_REG_CTRL_START 0x80 /* WO */ #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */ #define VIA_REG_CTRL_AUTOSTART 0x20 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */ #define VIA_REG_CTRL_INT_STOP 0x04 #define VIA_REG_CTRL_INT_EOL 0x02 #define VIA_REG_CTRL_INT_FLAG 0x01 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */ #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART) #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */ #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */ #define VIA_REG_TYPE_16BIT 0x20 /* RW */ #define VIA_REG_TYPE_STEREO 0x10 /* RW */ #define VIA_REG_TYPE_INT_LLINE 0x00 #define VIA_REG_TYPE_INT_LSAMPLE 0x04 #define VIA_REG_TYPE_INT_LESSONE 0x08 #define VIA_REG_TYPE_INT_MASK 0x0c #define VIA_REG_TYPE_INT_EOL 0x02 #define VIA_REG_TYPE_INT_FLAG 0x01 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */ #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */ #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */ #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */ #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */ #define DEFINE_VIA_REGSET(name,val) \ enum {\ VIA_REG_##name##_STATUS = (val),\ VIA_REG_##name##_CONTROL = (val) + 0x01,\ VIA_REG_##name##_TYPE = (val) + 0x02,\ VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\ VIA_REG_##name##_CURR_PTR = (val) + 0x04,\ VIA_REG_##name##_STOP_IDX = (val) + 0x08,\ VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\ } /* modem block */ DEFINE_VIA_REGSET(MO, 0x40); DEFINE_VIA_REGSET(MI, 0x50); /* AC'97 */ #define VIA_REG_AC97 0x80 /* dword */ #define VIA_REG_AC97_CODEC_ID_MASK (3<<30) #define VIA_REG_AC97_CODEC_ID_SHIFT 30 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01 #define VIA_REG_AC97_SECONDARY_VALID (1<<27) #define VIA_REG_AC97_PRIMARY_VALID (1<<25) #define VIA_REG_AC97_BUSY (1<<24) #define VIA_REG_AC97_READ (1<<23) #define VIA_REG_AC97_CMD_SHIFT 16 #define VIA_REG_AC97_CMD_MASK 0x7e #define VIA_REG_AC97_DATA_SHIFT 0 #define VIA_REG_AC97_DATA_MASK 0xffff #define VIA_REG_SGD_SHADOW 0x84 /* dword */ #define VIA_REG_SGD_STAT_PB_FLAG (1<<0) #define VIA_REG_SGD_STAT_CP_FLAG (1<<1) #define VIA_REG_SGD_STAT_FM_FLAG (1<<2) #define VIA_REG_SGD_STAT_PB_EOL (1<<4) #define VIA_REG_SGD_STAT_CP_EOL (1<<5) #define VIA_REG_SGD_STAT_FM_EOL (1<<6) #define VIA_REG_SGD_STAT_PB_STOP (1<<8) #define VIA_REG_SGD_STAT_CP_STOP (1<<9) #define VIA_REG_SGD_STAT_FM_STOP (1<<10) #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12) #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13) #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14) #define VIA_REG_SGD_STAT_MR_FLAG (1<<16) #define VIA_REG_SGD_STAT_MW_FLAG (1<<17) #define VIA_REG_SGD_STAT_MR_EOL (1<<20) #define VIA_REG_SGD_STAT_MW_EOL (1<<21) #define VIA_REG_SGD_STAT_MR_STOP (1<<24) #define VIA_REG_SGD_STAT_MW_STOP (1<<25) #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28) #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29) #define VIA_REG_GPI_STATUS 0x88 #define VIA_REG_GPI_INTR 0x8c #define VIA_TBL_BIT_FLAG 0x40000000 #define VIA_TBL_BIT_EOL 0x80000000 /* pci space */ #define VIA_ACLINK_STAT 0x40 #define VIA_ACLINK_C11_READY 0x20 #define VIA_ACLINK_C10_READY 0x10 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */ #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */ #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */ #define VIA_ACLINK_CTRL 0x41 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */ #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */ #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */ #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */ #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */ #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */ #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */ #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */ #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\ VIA_ACLINK_CTRL_RESET|\ VIA_ACLINK_CTRL_PCM) #define VIA_FUNC_ENABLE 0x42 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */ #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */ #define VIA_FUNC_RX2C_WRITE 0x20 #define VIA_FUNC_SB_FIFO_EMPTY 0x10 #define VIA_FUNC_ENABLE_GAME 0x08 #define VIA_FUNC_ENABLE_FM 0x04 #define VIA_FUNC_ENABLE_MIDI 0x02 #define VIA_FUNC_ENABLE_SB 0x01 #define VIA_PNP_CONTROL 0x43 #define VIA_MC97_CTRL 0x44 #define VIA_MC97_CTRL_ENABLE 0x80 #define VIA_MC97_CTRL_SECONDARY 0x40 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\ VIA_MC97_CTRL_SECONDARY) /* * pcm stream */ struct snd_via_sg_table { unsigned int offset; unsigned int size; } ; #define VIA_TABLE_SIZE 255 struct viadev { unsigned int reg_offset; unsigned long port; int direction; /* playback = 0, capture = 1 */ struct snd_pcm_substream *substream; int running; unsigned int tbl_entries; /* # descriptors */ struct snd_dma_buffer table; struct snd_via_sg_table *idx_table; /* for recovery from the unexpected pointer */ unsigned int lastpos; unsigned int bufsize; unsigned int bufsize2; }; enum { TYPE_CARD_VIA82XX_MODEM = 1 }; #define VIA_MAX_MODEM_DEVS 2 struct via82xx_modem { int irq; unsigned long port; unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */ struct pci_dev *pci; struct snd_card *card; unsigned int num_devs; unsigned int playback_devno, capture_devno; struct viadev devs[VIA_MAX_MODEM_DEVS]; struct snd_pcm *pcms[2]; struct snd_ac97_bus *ac97_bus; struct snd_ac97 *ac97; unsigned int ac97_clock; unsigned int ac97_secondary; /* secondary AC'97 codec is present */ spinlock_t reg_lock; struct snd_info_entry *proc_entry; }; static struct pci_device_id snd_via82xx_modem_ids[] = { { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, }, { 0, } }; MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids); /* */ /* * allocate and initialize the descriptor buffers * periods = number of periods * fragsize = period size in bytes */ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream, struct pci_dev *pci, unsigned int periods, unsigned int fragsize) { unsigned int i, idx, ofs, rest; struct via82xx_modem *chip = snd_pcm_substream_chip(substream); if (dev->table.area == NULL) { /* the start of each lists must be aligned to 8 bytes, * but the kernel pages are much bigger, so we don't care */ if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci), PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8), &dev->table) < 0) return -ENOMEM; } if (! dev->idx_table) { dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL); if (! dev->idx_table) return -ENOMEM; } /* fill the entries */ idx = 0; ofs = 0; for (i = 0; i < periods; i++) { rest = fragsize; /* fill descriptors for a period. * a period can be split to several descriptors if it's * over page boundary. */ do { unsigned int r; unsigned int flag; unsigned int addr; if (idx >= VIA_TABLE_SIZE) { snd_printk(KERN_ERR "via82xx: too much table size!\n"); return -EINVAL; } addr = snd_pcm_sgbuf_get_addr(substream, ofs); ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr); r = PAGE_SIZE - (ofs % PAGE_SIZE); if (rest < r) r = rest; rest -= r; if (! rest) { if (i == periods - 1) flag = VIA_TBL_BIT_EOL; /* buffer boundary */ else flag = VIA_TBL_BIT_FLAG; /* period boundary */ } else flag = 0; /* period continues to the next */ /* printk(KERN_DEBUG "via: tbl %d: at %d size %d " "(rest %d)\n", idx, ofs, r, rest); */ ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag); dev->idx_table[idx].offset = ofs; dev->idx_table[idx].size = r; ofs += r; idx++; } while (rest > 0); } dev->tbl_entries = idx; dev->bufsize = periods * fragsize; dev->bufsize2 = dev->bufsize / 2; return 0; } static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream, struct pci_dev *pci) { if (dev->table.area) { snd_dma_free_pages(&dev->table); dev->table.area = NULL; } kfree(dev->idx_table); dev->idx_table = NULL; return 0; } /* * Basic I/O */ static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip) { return inl(VIAREG(chip, AC97)); } static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val) { outl(val, VIAREG(chip, AC97)); } static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary) { unsigned int timeout = 1000; /* 1ms */ unsigned int val; while (timeout-- > 0) { udelay(1); if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)) return val & 0xffff; } snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip)); return -EIO; } static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary) { unsigned int timeout = 1000; /* 1ms */ unsigned int val, val1; unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID : VIA_REG_AC97_SECONDARY_VALID; while (timeout-- > 0) { val = snd_via82xx_codec_xread(chip); val1 = val & (VIA_REG_AC97_BUSY | stat); if (val1 == stat) return val & 0xffff; udelay(1); } return -EIO; } static void snd_via82xx_codec_wait(struct snd_ac97 *ac97) { struct via82xx_modem *chip = ac97->private_data; int err; err = snd_via82xx_codec_ready(chip, ac97->num); /* here we need to wait fairly for long time.. */ msleep(500); } static void snd_via82xx_codec_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { struct via82xx_modem *chip = ac97->private_data; unsigned int xval; if(reg == AC97_GPIO_STATUS) { outl(val, VIAREG(chip, GPI_STATUS)); return; } xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY; xval <<= VIA_REG_AC97_CODEC_ID_SHIFT; xval |= reg << VIA_REG_AC97_CMD_SHIFT; xval |= val << VIA_REG_AC97_DATA_SHIFT; snd_via82xx_codec_xwrite(chip, xval); snd_via82xx_codec_ready(chip, ac97->num); } static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg) { struct via82xx_modem *chip = ac97->private_data; unsigned int xval, val = 0xffff; int again = 0; xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT; xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID; xval |= VIA_REG_AC97_READ; xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT; while (1) { if (again++ > 3) { snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip)); return 0xffff; } snd_via82xx_codec_xwrite(chip, xval); udelay (20); if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) { udelay(25); val = snd_via82xx_codec_xread(chip); break; } } return val & 0xffff; } static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev) { outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET, VIADEV_REG(viadev, OFFSET_CONTROL)); inb(VIADEV_REG(viadev, OFFSET_CONTROL)); udelay(50); /* disable interrupts */ outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL)); /* clear interrupts */ outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS)); outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */ // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR)); viadev->lastpos = 0; } /* * Interrupt handler */ static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id) { struct via82xx_modem *chip = dev_id; unsigned int status; unsigned int i; status = inl(VIAREG(chip, SGD_SHADOW)); if (! (status & chip->intr_mask)) { return IRQ_NONE; } // _skip_sgd: /* check status for each stream */ spin_lock(&chip->reg_lock); for (i = 0; i < chip->num_devs; i++) { struct viadev *viadev = &chip->devs[i]; unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS)); c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED); if (! c_status) continue; if (viadev->substream && viadev->running) { spin_unlock(&chip->reg_lock); snd_pcm_period_elapsed(viadev->substream); spin_lock(&chip->reg_lock); } outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */ } spin_unlock(&chip->reg_lock); return IRQ_HANDLED; } /* * PCM callbacks */ /* * trigger callback */ static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = substream->runtime->private_data; unsigned char val = 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_SUSPEND: val |= VIA_REG_CTRL_START; viadev->running = 1; break; case SNDRV_PCM_TRIGGER_STOP: val = VIA_REG_CTRL_TERMINATE; viadev->running = 0; break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: val |= VIA_REG_CTRL_PAUSE; viadev->running = 0; break; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: viadev->running = 1; break; default: return -EINVAL; } outb(val, VIADEV_REG(viadev, OFFSET_CONTROL)); if (cmd == SNDRV_PCM_TRIGGER_STOP) snd_via82xx_channel_reset(chip, viadev); return 0; } /* * pointer callbacks */ /* * calculate the linear position at the given sg-buffer index and the rest count */ #define check_invalid_pos(viadev,pos) \ ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\ viadev->lastpos < viadev->bufsize2)) static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx, unsigned int count) { unsigned int size, res; size = viadev->idx_table[idx].size; res = viadev->idx_table[idx].offset + size - count; /* check the validity of the calculated position */ if (size < count) { snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count); res = viadev->lastpos; } else if (check_invalid_pos(viadev, res)) { #ifdef POINTER_DEBUG printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, " "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, " "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count); #endif if (count && size < count) { snd_printd(KERN_ERR "invalid via82xx_cur_ptr, " "using last valid pointer\n"); res = viadev->lastpos; } else { if (! count) /* bogus count 0 on the DMA boundary? */ res = viadev->idx_table[idx].offset; else /* count register returns full size * when end of buffer is reached */ res = viadev->idx_table[idx].offset + size; if (check_invalid_pos(viadev, res)) { snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), " "using last valid pointer\n"); res = viadev->lastpos; } } } viadev->lastpos = res; /* remember the last position */ if (res >= viadev->bufsize) res -= viadev->bufsize; return res; } /* * get the current pointer on via686 */ static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = substream->runtime->private_data; unsigned int idx, ptr, count, res; if (snd_BUG_ON(!viadev->tbl_entries)) return 0; if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE)) return 0; spin_lock(&chip->reg_lock); count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff; /* The via686a does not have the current index register, * so we need to calculate the index from CURR_PTR. */ ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR)); if (ptr <= (unsigned int)viadev->table.addr) idx = 0; else /* CURR_PTR holds the address + 8 */ idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries; res = calc_linear_pos(viadev, idx, count); spin_unlock(&chip->reg_lock); return bytes_to_frames(substream->runtime, res); } /* * hw_params callback: * allocate the buffer and build up the buffer description table */ static int snd_via82xx_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = substream->runtime->private_data; int err; err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; err = build_via_table(viadev, substream, chip->pci, params_periods(hw_params), params_period_bytes(hw_params)); if (err < 0) return err; snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params)); snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0); return 0; } /* * hw_free callback: * clean up the buffer description table and release the buffer */ static int snd_via82xx_hw_free(struct snd_pcm_substream *substream) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = substream->runtime->private_data; clean_via_table(viadev, substream, chip->pci); snd_pcm_lib_free_pages(substream); return 0; } /* * set up the table pointer */ static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev) { snd_via82xx_codec_ready(chip, chip->ac97_secondary); outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR)); udelay(20); snd_via82xx_codec_ready(chip, chip->ac97_secondary); } /* * prepare callback for playback and capture */ static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = substream->runtime->private_data; snd_via82xx_channel_reset(chip, viadev); /* this must be set after channel_reset */ snd_via82xx_set_table_ptr(chip, viadev); outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG, VIADEV_REG(viadev, OFFSET_TYPE)); return 0; } /* * pcm hardware definition, identical for both playback and capture */ static struct snd_pcm_hardware snd_via82xx_hw = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | /* SNDRV_PCM_INFO_RESUME | */ SNDRV_PCM_INFO_PAUSE), .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT, .rate_min = 8000, .rate_max = 16000, .channels_min = 1, .channels_max = 1, .buffer_bytes_max = 128 * 1024, .period_bytes_min = 32, .period_bytes_max = 128 * 1024, .periods_min = 2, .periods_max = VIA_TABLE_SIZE / 2, .fifo_size = 0, }; /* * open callback skeleton */ static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev, struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; int err; static unsigned int rates[] = { 8000, 9600, 12000, 16000 }; static struct snd_pcm_hw_constraint_list hw_constraints_rates = { .count = ARRAY_SIZE(rates), .list = rates, .mask = 0, }; runtime->hw = snd_via82xx_hw; if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0) return err; /* we may remove following constaint when we modify table entries in interrupt */ if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) return err; runtime->private_data = viadev; viadev->substream = substream; return 0; } /* * open callback for playback */ static int snd_via82xx_playback_open(struct snd_pcm_substream *substream) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number]; return snd_via82xx_modem_pcm_open(chip, viadev, substream); } /* * open callback for capture */ static int snd_via82xx_capture_open(struct snd_pcm_substream *substream) { struct via82xx_modem *chip = snd_pcm_substream_chip(substream); struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device]; return snd_via82xx_modem_pcm_open(chip, viadev, substream); } /* * close callback */ static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream) { struct viadev *viadev = substream->runtime->private_data; viadev->substream = NULL; return 0; } /* via686 playback callbacks */ static struct snd_pcm_ops snd_via686_playback_ops = { .open = snd_via82xx_playback_open, .close = snd_via82xx_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_via82xx_hw_params, .hw_free = snd_via82xx_hw_free, .prepare = snd_via82xx_pcm_prepare, .trigger = snd_via82xx_pcm_trigger, .pointer = snd_via686_pcm_pointer, .page = snd_pcm_sgbuf_ops_page, }; /* via686 capture callbacks */ static struct snd_pcm_ops snd_via686_capture_ops = { .open = snd_via82xx_capture_open, .close = snd_via82xx_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_via82xx_hw_params, .hw_free = snd_via82xx_hw_free, .prepare = snd_via82xx_pcm_prepare, .trigger = snd_via82xx_pcm_trigger, .pointer = snd_via686_pcm_pointer, .page = snd_pcm_sgbuf_ops_page, }; static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset, int direction) { chip->devs[idx].reg_offset = reg_offset; chip->devs[idx].direction = direction; chip->devs[idx].port = chip->port + reg_offset; } /* * create a pcm instance for via686a/b */ static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip) { struct snd_pcm *pcm; int err; chip->playback_devno = 0; chip->capture_devno = 1; chip->num_devs = 2; chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */ err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); if (err < 0) return err; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops); pcm->dev_class = SNDRV_PCM_CLASS_MODEM; pcm->private_data = chip; strcpy(pcm->name, chip->card->shortname); chip->pcms[0] = pcm; init_viadev(chip, 0, VIA_REG_MO_STATUS, 0); init_viadev(chip, 1, VIA_REG_MI_STATUS, 1); if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0) return err; return 0; } /* * Mixer part */ static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus) { struct via82xx_modem *chip = bus->private_data; chip->ac97_bus = NULL; } static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97) { struct via82xx_modem *chip = ac97->private_data; chip->ac97 = NULL; } static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip) { struct snd_ac97_template ac97; int err; static struct snd_ac97_bus_ops ops = { .write = snd_via82xx_codec_write, .read = snd_via82xx_codec_read, .wait = snd_via82xx_codec_wait, }; if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0) return err; chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus; chip->ac97_bus->clock = chip->ac97_clock; memset(&ac97, 0, sizeof(ac97)); ac97.private_data = chip; ac97.private_free = snd_via82xx_mixer_free_ac97; ac97.pci = chip->pci; ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; ac97.num = chip->ac97_secondary; if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0) return err; return 0; } /* * proc interface */ static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct via82xx_modem *chip = entry->private_data; int i; snd_iprintf(buffer, "%s\n\n", chip->card->longname); for (i = 0; i < 0xa0; i += 4) { snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i)); } } static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip) { struct snd_info_entry *entry; if (! snd_card_proc_new(chip->card, "via82xx", &entry)) snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read); } /* * */ static int snd_via82xx_chip_init(struct via82xx_modem *chip) { unsigned int val; unsigned long end_time; unsigned char pval; pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval); if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) { pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT); udelay(100); } pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */ /* deassert ACLink reset, force SYNC */ pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_ENABLE | VIA_ACLINK_CTRL_RESET | VIA_ACLINK_CTRL_SYNC); udelay(100); #if 1 /* FIXME: should we do full reset here for all chip models? */ pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00); udelay(100); #else /* deassert ACLink reset, force SYNC (warm AC'97 reset) */ pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC); udelay(2); #endif /* ACLink on, deassert ACLink reset, VSR, SGD data out */ pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); udelay(100); } pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval); if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) { /* ACLink on, deassert ACLink reset, VSR, SGD data out */ pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); udelay(100); } /* wait until codec ready */ end_time = jiffies + msecs_to_jiffies(750); do { pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */ break; schedule_timeout_uninterruptible(1); } while (time_before(jiffies, end_time)); if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY) snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val); snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | VIA_REG_AC97_SECONDARY_VALID | (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); end_time = jiffies + msecs_to_jiffies(750); snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | VIA_REG_AC97_SECONDARY_VALID | (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); do { if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) { chip->ac97_secondary = 1; goto __ac97_ok2; } schedule_timeout_uninterruptible(1); } while (time_before(jiffies, end_time)); /* This is ok, the most of motherboards have only one codec */ __ac97_ok2: /* route FM trap to IRQ, disable FM trap */ // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0); /* disable all GPI interrupts */ outl(0, VIAREG(chip, GPI_INTR)); return 0; } #ifdef CONFIG_PM /* * power management */ static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state) { struct snd_card *card = pci_get_drvdata(pci); struct via82xx_modem *chip = card->private_data; int i; snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); for (i = 0; i < 2; i++) snd_pcm_suspend_all(chip->pcms[i]); for (i = 0; i < chip->num_devs; i++) snd_via82xx_channel_reset(chip, &chip->devs[i]); synchronize_irq(chip->irq); snd_ac97_suspend(chip->ac97); pci_disable_device(pci); pci_save_state(pci); pci_set_power_state(pci, pci_choose_state(pci, state)); return 0; } static int snd_via82xx_resume(struct pci_dev *pci) { struct snd_card *card = pci_get_drvdata(pci); struct via82xx_modem *chip = card->private_data; int i; pci_set_power_state(pci, PCI_D0); pci_restore_state(pci); if (pci_enable_device(pci) < 0) { printk(KERN_ERR "via82xx-modem: pci_enable_device failed, " "disabling device\n"); snd_card_disconnect(card); return -EIO; } pci_set_master(pci); snd_via82xx_chip_init(chip); snd_ac97_resume(chip->ac97); for (i = 0; i < chip->num_devs; i++) snd_via82xx_channel_reset(chip, &chip->devs[i]); snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } #endif /* CONFIG_PM */ static int snd_via82xx_free(struct via82xx_modem *chip) { unsigned int i; if (chip->irq < 0) goto __end_hw; /* disable interrupts */ for (i = 0; i < chip->num_devs; i++) snd_via82xx_channel_reset(chip, &chip->devs[i]); __end_hw: if (chip->irq >= 0) free_irq(chip->irq, chip); pci_release_regions(chip->pci); pci_disable_device(chip->pci); kfree(chip); return 0; } static int snd_via82xx_dev_free(struct snd_device *device) { struct via82xx_modem *chip = device->device_data; return snd_via82xx_free(chip); } static int __devinit snd_via82xx_create(struct snd_card *card, struct pci_dev *pci, int chip_type, int revision, unsigned int ac97_clock, struct via82xx_modem ** r_via) { struct via82xx_modem *chip; int err; static struct snd_device_ops ops = { .dev_free = snd_via82xx_dev_free, }; if ((err = pci_enable_device(pci)) < 0) return err; if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) { pci_disable_device(pci); return -ENOMEM; } spin_lock_init(&chip->reg_lock); chip->card = card; chip->pci = pci; chip->irq = -1; if ((err = pci_request_regions(pci, card->driver)) < 0) { kfree(chip); pci_disable_device(pci); return err; } chip->port = pci_resource_start(pci, 0); if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED, card->driver, chip)) { snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq); snd_via82xx_free(chip); return -EBUSY; } chip->irq = pci->irq; if (ac97_clock >= 8000 && ac97_clock <= 48000) chip->ac97_clock = ac97_clock; synchronize_irq(chip->irq); if ((err = snd_via82xx_chip_init(chip)) < 0) { snd_via82xx_free(chip); return err; } if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { snd_via82xx_free(chip); return err; } /* The 8233 ac97 controller does not implement the master bit * in the pci command register. IMHO this is a violation of the PCI spec. * We call pci_set_master here because it does not hurt. */ pci_set_master(pci); snd_card_set_dev(card, &pci->dev); *r_via = chip; return 0; } static int __devinit snd_via82xx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { struct snd_card *card; struct via82xx_modem *chip; int chip_type = 0, card_type; unsigned int i; int err; err = snd_card_create(index, id, THIS_MODULE, 0, &card); if (err < 0) return err; card_type = pci_id->driver_data; switch (card_type) { case TYPE_CARD_VIA82XX_MODEM: strcpy(card->driver, "VIA82XX-MODEM"); sprintf(card->shortname, "VIA 82XX modem"); break; default: snd_printk(KERN_ERR "invalid card type %d\n", card_type); err = -EINVAL; goto __error; } if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision, ac97_clock, &chip)) < 0) goto __error; card->private_data = chip; if ((err = snd_via82xx_mixer_new(chip)) < 0) goto __error; if ((err = snd_via686_pcm_new(chip)) < 0 ) goto __error; /* disable interrupts */ for (i = 0; i < chip->num_devs; i++) snd_via82xx_channel_reset(chip, &chip->devs[i]); sprintf(card->longname, "%s at 0x%lx, irq %d", card->shortname, chip->port, chip->irq); snd_via82xx_proc_init(chip); if ((err = snd_card_register(card)) < 0) { snd_card_free(card); return err; } pci_set_drvdata(pci, card); return 0; __error: snd_card_free(card); return err; } static void __devexit snd_via82xx_remove(struct pci_dev *pci) { snd_card_free(pci_get_drvdata(pci)); pci_set_drvdata(pci, NULL); } static struct pci_driver driver = { .name = "VIA 82xx Modem", .id_table = snd_via82xx_modem_ids, .probe = snd_via82xx_probe, .remove = __devexit_p(snd_via82xx_remove), #ifdef CONFIG_PM .suspend = snd_via82xx_suspend, .resume = snd_via82xx_resume, #endif }; static int __init alsa_card_via82xx_init(void) { return pci_register_driver(&driver); } static void __exit alsa_card_via82xx_exit(void) { pci_unregister_driver(&driver); } module_init(alsa_card_via82xx_init) module_exit(alsa_card_via82xx_exit)