diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/pci/via82xx_modem.c | 1175 |
1 files changed, 1175 insertions, 0 deletions
diff --git a/sound/pci/via82xx_modem.c b/sound/pci/via82xx_modem.c new file mode 100644 index 0000000000..ca7f024bf8 --- /dev/null +++ b/sound/pci/via82xx_modem.c @@ -0,0 +1,1175 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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> + */ + +/* + * Changes: + * + * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org> + * Modified from original audio driver 'via82xx.c' to support AC97 + * modems. + */ + +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/module.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"); + +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 bool 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 const 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); + __le32 *pgtbl; + + 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, &chip->pci->dev, + PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8), + &dev->table) < 0) + return -ENOMEM; + } + if (! dev->idx_table) { + dev->idx_table = kmalloc_array(VIA_TABLE_SIZE, + sizeof(*dev->idx_table), + GFP_KERNEL); + if (! dev->idx_table) + return -ENOMEM; + } + + /* fill the entries */ + idx = 0; + ofs = 0; + pgtbl = (__le32 *)dev->table.area; + 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) { + dev_err(&pci->dev, "too much table size!\n"); + return -EINVAL; + } + addr = snd_pcm_sgbuf_get_addr(substream, ofs); + pgtbl[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 */ + /* + dev_dbg(&pci->dev, + "tbl %d: at %d size %d (rest %d)\n", + idx, ofs, r, rest); + */ + pgtbl[(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); + val = snd_via82xx_codec_xread(chip); + if (!(val & VIA_REG_AC97_BUSY)) + return val & 0xffff; + } + dev_err(chip->card->dev, "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; + __always_unused 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) { + dev_err(chip->card->dev, + "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 via82xx_modem *chip, + 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) { + dev_err(chip->card->dev, + "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 + dev_dbg(chip->card->dev, + "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) { + dev_dbg(chip->card->dev, + "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)) { + dev_dbg(chip->card->dev, + "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(chip, 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 = 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); + 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 const 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 const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; + static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { + .count = ARRAY_SIZE(rates), + .list = rates, + .mask = 0, + }; + + runtime->hw = snd_via82xx_hw; + + err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + &hw_constraints_rates); + if (err < 0) + return err; + + /* we may remove following constaint when we modify table entries + in interrupt */ + err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 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 const struct snd_pcm_ops snd_via686_playback_ops = { + .open = snd_via82xx_playback_open, + .close = snd_via82xx_pcm_close, + .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, +}; + +/* via686 capture callbacks */ +static const struct snd_pcm_ops snd_via686_capture_ops = { + .open = snd_via82xx_capture_open, + .close = snd_via82xx_pcm_close, + .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, +}; + + +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 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); + + snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, + &chip->pci->dev, 64*1024, 128*1024); + 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 snd_via82xx_mixer_new(struct via82xx_modem *chip) +{ + struct snd_ac97_template ac97; + int err; + static const struct snd_ac97_bus_ops ops = { + .write = snd_via82xx_codec_write, + .read = snd_via82xx_codec_read, + .wait = snd_via82xx_codec_wait, + }; + + err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus); + if (err < 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; + + err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97); + if (err < 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 snd_via82xx_proc_init(struct via82xx_modem *chip) +{ + snd_card_ro_proc_new(chip->card, "via82xx", 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)); + + val = snd_via82xx_codec_xread(chip); + if (val & VIA_REG_AC97_BUSY) + dev_err(chip->card->dev, + "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 { + val = snd_via82xx_codec_xread(chip); + if (val & 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_SLEEP +/* + * power management + */ +static int snd_via82xx_suspend(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); + struct via82xx_modem *chip = card->private_data; + int i; + + snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); + for (i = 0; i < chip->num_devs; i++) + snd_via82xx_channel_reset(chip, &chip->devs[i]); + snd_ac97_suspend(chip->ac97); + return 0; +} + +static int snd_via82xx_resume(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); + struct via82xx_modem *chip = card->private_data; + int i; + + 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; +} + +static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume); +#define SND_VIA82XX_PM_OPS &snd_via82xx_pm +#else +#define SND_VIA82XX_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +static void snd_via82xx_free(struct snd_card *card) +{ + struct via82xx_modem *chip = card->private_data; + unsigned int i; + + /* disable interrupts */ + for (i = 0; i < chip->num_devs; i++) + snd_via82xx_channel_reset(chip, &chip->devs[i]); +} + +static int snd_via82xx_create(struct snd_card *card, + struct pci_dev *pci, + int chip_type, + int revision, + unsigned int ac97_clock) +{ + struct via82xx_modem *chip = card->private_data; + int err; + + err = pcim_enable_device(pci); + if (err < 0) + return err; + + spin_lock_init(&chip->reg_lock); + chip->card = card; + chip->pci = pci; + chip->irq = -1; + + err = pci_request_regions(pci, card->driver); + if (err < 0) + return err; + chip->port = pci_resource_start(pci, 0); + if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt, + IRQF_SHARED, KBUILD_MODNAME, chip)) { + dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); + return -EBUSY; + } + chip->irq = pci->irq; + card->sync_irq = chip->irq; + card->private_free = snd_via82xx_free; + if (ac97_clock >= 8000 && ac97_clock <= 48000) + chip->ac97_clock = ac97_clock; + + err = snd_via82xx_chip_init(chip); + if (err < 0) + 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); + return 0; +} + + +static int __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_devm_card_new(&pci->dev, index, id, THIS_MODULE, + sizeof(*chip), &card); + if (err < 0) + return err; + chip = card->private_data; + + 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: + dev_err(card->dev, "invalid card type %d\n", card_type); + return -EINVAL; + } + + err = snd_via82xx_create(card, pci, chip_type, pci->revision, + ac97_clock); + if (err < 0) + return err; + err = snd_via82xx_mixer_new(chip); + if (err < 0) + return err; + + err = snd_via686_pcm_new(chip); + if (err < 0) + return err; + + /* 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); + + err = snd_card_register(card); + if (err < 0) + return err; + pci_set_drvdata(pci, card); + return 0; +} + +static int snd_via82xx_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id)); +} + +static struct pci_driver via82xx_modem_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_via82xx_modem_ids, + .probe = snd_via82xx_probe, + .driver = { + .pm = SND_VIA82XX_PM_OPS, + }, +}; + +module_pci_driver(via82xx_modem_driver); |