diff options
Diffstat (limited to 'sound/pci/atiixp_modem.c')
| -rw-r--r-- | sound/pci/atiixp_modem.c | 1265 |
1 files changed, 1265 insertions, 0 deletions
diff --git a/sound/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c new file mode 100644 index 000000000..8864c4c3c --- /dev/null +++ b/sound/pci/atiixp_modem.c @@ -0,0 +1,1265 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers + * + * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de> + */ + +#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 <linux/mutex.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> + +MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); +MODULE_DESCRIPTION("ATI IXP MC97 controller"); +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 ATI IXP controller."); +module_param(id, charp, 0444); +MODULE_PARM_DESC(id, "ID string for ATI IXP controller."); +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); + + +/* + */ + +#define ATI_REG_ISR 0x00 /* interrupt source */ +#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0) +#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1) +#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2) +#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3) +#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4) +#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5) +#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6) +#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7) +#define ATI_REG_ISR_PHYS_INTR (1U<<8) +#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9) +#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10) +#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11) +#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12) +#define ATI_REG_ISR_NEW_FRAME (1U<<13) +#define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14) + +#define ATI_REG_IER 0x04 /* interrupt enable */ +#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0) +#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1) +#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2) +#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4) +#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6) +#define ATI_REG_IER_PHYS_INTR_EN (1U<<8) +#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9) +#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10) +#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11) +#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12) +#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */ +#define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */ +#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15) + +#define ATI_REG_CMD 0x08 /* command */ +#define ATI_REG_CMD_POWERDOWN (1U<<0) +#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */ +#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */ +#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */ +#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */ +#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */ +#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */ +#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */ +#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */ +#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */ +#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20) +#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */ +#define ATI_REG_CMD_LOOPBACK_EN (1U<<23) +#define ATI_REG_CMD_PACKED_DIS (1U<<24) +#define ATI_REG_CMD_BURST_EN (1U<<25) +#define ATI_REG_CMD_PANIC_EN (1U<<26) +#define ATI_REG_CMD_MODEM_PRESENT (1U<<27) +#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28) +#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29) +#define ATI_REG_CMD_AC_SYNC (1U<<30) +#define ATI_REG_CMD_AC_RESET (1U<<31) + +#define ATI_REG_PHYS_OUT_ADDR 0x0c +#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0) +#define ATI_REG_PHYS_OUT_RW (1U<<2) +#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8) +#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9 +#define ATI_REG_PHYS_OUT_DATA_SHIFT 16 + +#define ATI_REG_PHYS_IN_ADDR 0x10 +#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8) +#define ATI_REG_PHYS_IN_ADDR_SHIFT 9 +#define ATI_REG_PHYS_IN_DATA_SHIFT 16 + +#define ATI_REG_SLOTREQ 0x14 + +#define ATI_REG_COUNTER 0x18 +#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */ +#define ATI_REG_COUNTER_BITCLOCK (31U<<8) + +#define ATI_REG_IN_FIFO_THRESHOLD 0x1c + +#define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20 +#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */ +#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */ +#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */ +#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30 +#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */ +#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16) +#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16 +#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38 +#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c +#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40 +#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44 +#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48 +#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c +#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50 +#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54 +#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58 +#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c +#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60 +#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64 +#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68 +#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c +#define ATI_REG_MODEM_OUT_FIFO_USED 0x70 +#define ATI_REG_MODEM_OUT_GPIO 0x74 +#define ATI_REG_MODEM_OUT_GPIO_EN 1 +#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5 +#define ATI_REG_MODEM_IN_GPIO 0x78 + +#define ATI_REG_MODEM_MIRROR 0x7c +#define ATI_REG_AUDIO_MIRROR 0x80 + +#define ATI_REG_MODEM_FIFO_FLUSH 0x88 +#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0) +#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1) +#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2) +#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3) + +/* LINKPTR */ +#define ATI_REG_LINKPTR_EN (1U<<0) + +#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */ + + +struct atiixp_modem; + +/* + * DMA packate descriptor + */ + +struct atiixp_dma_desc { + __le32 addr; /* DMA buffer address */ + u16 status; /* status bits */ + u16 size; /* size of the packet in dwords */ + __le32 next; /* address of the next packet descriptor */ +}; + +/* + * stream enum + */ +enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */ +enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */ +enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */ + +#define NUM_ATI_CODECS 3 + + +/* + * constants and callbacks for each DMA type + */ +struct atiixp_dma_ops { + int type; /* ATI_DMA_XXX */ + unsigned int llp_offset; /* LINKPTR offset */ + unsigned int dt_cur; /* DT_CUR offset */ + /* called from open callback */ + void (*enable_dma)(struct atiixp_modem *chip, int on); + /* called from trigger (START/STOP) */ + void (*enable_transfer)(struct atiixp_modem *chip, int on); + /* called from trigger (STOP only) */ + void (*flush_dma)(struct atiixp_modem *chip); +}; + +/* + * DMA stream + */ +struct atiixp_dma { + const struct atiixp_dma_ops *ops; + struct snd_dma_buffer desc_buf; + struct snd_pcm_substream *substream; /* assigned PCM substream */ + unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */ + unsigned int period_bytes, periods; + int opened; + int running; + int pcm_open_flag; + int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */ +}; + +/* + * ATI IXP chip + */ +struct atiixp_modem { + struct snd_card *card; + struct pci_dev *pci; + + struct resource *res; /* memory i/o */ + unsigned long addr; + void __iomem *remap_addr; + int irq; + + struct snd_ac97_bus *ac97_bus; + struct snd_ac97 *ac97[NUM_ATI_CODECS]; + + spinlock_t reg_lock; + + struct atiixp_dma dmas[NUM_ATI_DMAS]; + struct ac97_pcm *pcms[NUM_ATI_PCMS]; + struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS]; + + int max_channels; /* max. channels for PCM out */ + + unsigned int codec_not_ready_bits; /* for codec detection */ + + int spdif_over_aclink; /* passed from the module option */ + struct mutex open_mutex; /* playback open mutex */ +}; + + +/* + */ +static const struct pci_device_id snd_atiixp_ids[] = { + { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */ + { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */ + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, snd_atiixp_ids); + + +/* + * lowlevel functions + */ + +/* + * update the bits of the given register. + * return 1 if the bits changed. + */ +static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg, + unsigned int mask, unsigned int value) +{ + void __iomem *addr = chip->remap_addr + reg; + unsigned int data, old_data; + old_data = data = readl(addr); + data &= ~mask; + data |= value; + if (old_data == data) + return 0; + writel(data, addr); + return 1; +} + +/* + * macros for easy use + */ +#define atiixp_write(chip,reg,value) \ + writel(value, chip->remap_addr + ATI_REG_##reg) +#define atiixp_read(chip,reg) \ + readl(chip->remap_addr + ATI_REG_##reg) +#define atiixp_update(chip,reg,mask,val) \ + snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val) + +/* + * handling DMA packets + * + * we allocate a linear buffer for the DMA, and split it to each packet. + * in a future version, a scatter-gather buffer should be implemented. + */ + +#define ATI_DESC_LIST_SIZE \ + PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc)) + +/* + * build packets ring for the given buffer size. + * + * IXP handles the buffer descriptors, which are connected as a linked + * list. although we can change the list dynamically, in this version, + * a static RING of buffer descriptors is used. + * + * the ring is built in this function, and is set up to the hardware. + */ +static int atiixp_build_dma_packets(struct atiixp_modem *chip, + struct atiixp_dma *dma, + struct snd_pcm_substream *substream, + unsigned int periods, + unsigned int period_bytes) +{ + unsigned int i; + u32 addr, desc_addr; + unsigned long flags; + + if (periods > ATI_MAX_DESCRIPTORS) + return -ENOMEM; + + if (dma->desc_buf.area == NULL) { + if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev, + ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0) + return -ENOMEM; + dma->period_bytes = dma->periods = 0; /* clear */ + } + + if (dma->periods == periods && dma->period_bytes == period_bytes) + return 0; + + /* reset DMA before changing the descriptor table */ + spin_lock_irqsave(&chip->reg_lock, flags); + writel(0, chip->remap_addr + dma->ops->llp_offset); + dma->ops->enable_dma(chip, 0); + dma->ops->enable_dma(chip, 1); + spin_unlock_irqrestore(&chip->reg_lock, flags); + + /* fill the entries */ + addr = (u32)substream->runtime->dma_addr; + desc_addr = (u32)dma->desc_buf.addr; + for (i = 0; i < periods; i++) { + struct atiixp_dma_desc *desc; + desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i]; + desc->addr = cpu_to_le32(addr); + desc->status = 0; + desc->size = period_bytes >> 2; /* in dwords */ + desc_addr += sizeof(struct atiixp_dma_desc); + if (i == periods - 1) + desc->next = cpu_to_le32((u32)dma->desc_buf.addr); + else + desc->next = cpu_to_le32(desc_addr); + addr += period_bytes; + } + + writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN, + chip->remap_addr + dma->ops->llp_offset); + + dma->period_bytes = period_bytes; + dma->periods = periods; + + return 0; +} + +/* + * remove the ring buffer and release it if assigned + */ +static void atiixp_clear_dma_packets(struct atiixp_modem *chip, + struct atiixp_dma *dma, + struct snd_pcm_substream *substream) +{ + if (dma->desc_buf.area) { + writel(0, chip->remap_addr + dma->ops->llp_offset); + snd_dma_free_pages(&dma->desc_buf); + dma->desc_buf.area = NULL; + } +} + +/* + * AC97 interface + */ +static int snd_atiixp_acquire_codec(struct atiixp_modem *chip) +{ + int timeout = 1000; + + while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) { + if (! timeout--) { + dev_warn(chip->card->dev, "codec acquire timeout\n"); + return -EBUSY; + } + udelay(1); + } + return 0; +} + +static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip, + unsigned short codec, + unsigned short reg) +{ + unsigned int data; + int timeout; + + if (snd_atiixp_acquire_codec(chip) < 0) + return 0xffff; + data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) | + ATI_REG_PHYS_OUT_ADDR_EN | + ATI_REG_PHYS_OUT_RW | + codec; + atiixp_write(chip, PHYS_OUT_ADDR, data); + if (snd_atiixp_acquire_codec(chip) < 0) + return 0xffff; + timeout = 1000; + do { + data = atiixp_read(chip, PHYS_IN_ADDR); + if (data & ATI_REG_PHYS_IN_READ_FLAG) + return data >> ATI_REG_PHYS_IN_DATA_SHIFT; + udelay(1); + } while (--timeout); + /* time out may happen during reset */ + if (reg < 0x7c) + dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg); + return 0xffff; +} + + +static void snd_atiixp_codec_write(struct atiixp_modem *chip, + unsigned short codec, + unsigned short reg, unsigned short val) +{ + unsigned int data; + + if (snd_atiixp_acquire_codec(chip) < 0) + return; + data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) | + ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) | + ATI_REG_PHYS_OUT_ADDR_EN | codec; + atiixp_write(chip, PHYS_OUT_ADDR, data); +} + + +static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97, + unsigned short reg) +{ + struct atiixp_modem *chip = ac97->private_data; + return snd_atiixp_codec_read(chip, ac97->num, reg); + +} + +static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg, + unsigned short val) +{ + struct atiixp_modem *chip = ac97->private_data; + if (reg == AC97_GPIO_STATUS) { + atiixp_write(chip, MODEM_OUT_GPIO, + (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN); + return; + } + snd_atiixp_codec_write(chip, ac97->num, reg, val); +} + +/* + * reset AC link + */ +static int snd_atiixp_aclink_reset(struct atiixp_modem *chip) +{ + int timeout; + + /* reset powerdoewn */ + if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0)) + udelay(10); + + /* perform a software reset */ + atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET); + atiixp_read(chip, CMD); + udelay(10); + atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0); + + timeout = 10; + while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) { + /* do a hard reset */ + atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET, + ATI_REG_CMD_AC_SYNC); + atiixp_read(chip, CMD); + msleep(1); + atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET); + if (!--timeout) { + dev_err(chip->card->dev, "codec reset timeout\n"); + break; + } + } + + /* deassert RESET and assert SYNC to make sure */ + atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET, + ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int snd_atiixp_aclink_down(struct atiixp_modem *chip) +{ + // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */ + // return -EBUSY; + atiixp_update(chip, CMD, + ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET, + ATI_REG_CMD_POWERDOWN); + return 0; +} +#endif + +/* + * auto-detection of codecs + * + * the IXP chip can generate interrupts for the non-existing codecs. + * NEW_FRAME interrupt is used to make sure that the interrupt is generated + * even if all three codecs are connected. + */ + +#define ALL_CODEC_NOT_READY \ + (ATI_REG_ISR_CODEC0_NOT_READY |\ + ATI_REG_ISR_CODEC1_NOT_READY |\ + ATI_REG_ISR_CODEC2_NOT_READY) +#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME) + +static int snd_atiixp_codec_detect(struct atiixp_modem *chip) +{ + int timeout; + + chip->codec_not_ready_bits = 0; + atiixp_write(chip, IER, CODEC_CHECK_BITS); + /* wait for the interrupts */ + timeout = 50; + while (timeout-- > 0) { + msleep(1); + if (chip->codec_not_ready_bits) + break; + } + atiixp_write(chip, IER, 0); /* disable irqs */ + + if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) { + dev_err(chip->card->dev, "no codec detected!\n"); + return -ENXIO; + } + return 0; +} + + +/* + * enable DMA and irqs + */ +static int snd_atiixp_chip_start(struct atiixp_modem *chip) +{ + unsigned int reg; + + /* set up spdif, enable burst mode */ + reg = atiixp_read(chip, CMD); + reg |= ATI_REG_CMD_BURST_EN; + if(!(reg & ATI_REG_CMD_MODEM_PRESENT)) + reg |= ATI_REG_CMD_MODEM_PRESENT; + atiixp_write(chip, CMD, reg); + + /* clear all interrupt source */ + atiixp_write(chip, ISR, 0xffffffff); + /* enable irqs */ + atiixp_write(chip, IER, + ATI_REG_IER_MODEM_STATUS_EN | + ATI_REG_IER_MODEM_IN_XRUN_EN | + ATI_REG_IER_MODEM_OUT1_XRUN_EN); + return 0; +} + + +/* + * disable DMA and IRQs + */ +static int snd_atiixp_chip_stop(struct atiixp_modem *chip) +{ + /* clear interrupt source */ + atiixp_write(chip, ISR, atiixp_read(chip, ISR)); + /* disable irqs */ + atiixp_write(chip, IER, 0); + return 0; +} + + +/* + * PCM section + */ + +/* + * pointer callback simplly reads XXX_DMA_DT_CUR register as the current + * position. when SG-buffer is implemented, the offset must be calculated + * correctly... + */ +static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct atiixp_dma *dma = runtime->private_data; + unsigned int curptr; + int timeout = 1000; + + while (timeout--) { + curptr = readl(chip->remap_addr + dma->ops->dt_cur); + if (curptr < dma->buf_addr) + continue; + curptr -= dma->buf_addr; + if (curptr >= dma->buf_bytes) + continue; + return bytes_to_frames(runtime, curptr); + } + dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n", + readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr); + return 0; +} + +/* + * XRUN detected, and stop the PCM substream + */ +static void snd_atiixp_xrun_dma(struct atiixp_modem *chip, + struct atiixp_dma *dma) +{ + if (! dma->substream || ! dma->running) + return; + dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type); + snd_pcm_stop_xrun(dma->substream); +} + +/* + * the period ack. update the substream. + */ +static void snd_atiixp_update_dma(struct atiixp_modem *chip, + struct atiixp_dma *dma) +{ + if (! dma->substream || ! dma->running) + return; + snd_pcm_period_elapsed(dma->substream); +} + +/* set BUS_BUSY interrupt bit if any DMA is running */ +/* call with spinlock held */ +static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip) +{ + unsigned int bus_busy; + if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN | + ATI_REG_CMD_MODEM_RECEIVE_EN)) + bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY; + else + bus_busy = 0; + atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy); +} + +/* common trigger callback + * calling the lowlevel callbacks in it + */ +static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + struct atiixp_dma *dma = substream->runtime->private_data; + int err = 0; + + if (snd_BUG_ON(!dma->ops->enable_transfer || + !dma->ops->flush_dma)) + return -EINVAL; + + spin_lock(&chip->reg_lock); + switch(cmd) { + case SNDRV_PCM_TRIGGER_START: + dma->ops->enable_transfer(chip, 1); + dma->running = 1; + break; + case SNDRV_PCM_TRIGGER_STOP: + dma->ops->enable_transfer(chip, 0); + dma->running = 0; + break; + default: + err = -EINVAL; + break; + } + if (! err) { + snd_atiixp_check_bus_busy(chip); + if (cmd == SNDRV_PCM_TRIGGER_STOP) { + dma->ops->flush_dma(chip); + snd_atiixp_check_bus_busy(chip); + } + } + spin_unlock(&chip->reg_lock); + return err; +} + + +/* + * lowlevel callbacks for each DMA type + * + * every callback is supposed to be called in chip->reg_lock spinlock + */ + +/* flush FIFO of analog OUT DMA */ +static void atiixp_out_flush_dma(struct atiixp_modem *chip) +{ + atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH); +} + +/* enable/disable analog OUT DMA */ +static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on) +{ + unsigned int data; + data = atiixp_read(chip, CMD); + if (on) { + if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN) + return; + atiixp_out_flush_dma(chip); + data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN; + } else + data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN; + atiixp_write(chip, CMD, data); +} + +/* start/stop transfer over OUT DMA */ +static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on) +{ + atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN, + on ? ATI_REG_CMD_MODEM_SEND1_EN : 0); +} + +/* enable/disable analog IN DMA */ +static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on) +{ + atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN, + on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0); +} + +/* start/stop analog IN DMA */ +static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on) +{ + if (on) { + unsigned int data = atiixp_read(chip, CMD); + if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) { + data |= ATI_REG_CMD_MODEM_RECEIVE_EN; + atiixp_write(chip, CMD, data); + } + } else + atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0); +} + +/* flush FIFO of analog IN DMA */ +static void atiixp_in_flush_dma(struct atiixp_modem *chip) +{ + atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH); +} + +/* set up slots and formats for analog OUT */ +static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + unsigned int data; + + spin_lock_irq(&chip->reg_lock); + /* set output threshold */ + data = atiixp_read(chip, MODEM_OUT_FIFO); + data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK; + data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT; + atiixp_write(chip, MODEM_OUT_FIFO, data); + spin_unlock_irq(&chip->reg_lock); + return 0; +} + +/* set up slots and formats for analog IN */ +static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream) +{ + return 0; +} + +/* + * hw_params - allocate the buffer and set up buffer descriptors + */ +static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + struct atiixp_dma *dma = substream->runtime->private_data; + int err; + int i; + + dma->buf_addr = substream->runtime->dma_addr; + dma->buf_bytes = params_buffer_bytes(hw_params); + + err = atiixp_build_dma_packets(chip, dma, substream, + params_periods(hw_params), + params_period_bytes(hw_params)); + if (err < 0) + return err; + + /* set up modem rate */ + for (i = 0; i < NUM_ATI_CODECS; i++) { + if (! chip->ac97[i]) + continue; + snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params)); + snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0); + } + + return err; +} + +static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + struct atiixp_dma *dma = substream->runtime->private_data; + + atiixp_clear_dma_packets(chip, dma, substream); + return 0; +} + + +/* + * pcm hardware definition, identical for all DMA types + */ +static const struct snd_pcm_hardware snd_atiixp_pcm_hw = +{ + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = 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 = 2, + .channels_max = 2, + .buffer_bytes_max = 256 * 1024, + .period_bytes_min = 32, + .period_bytes_max = 128 * 1024, + .periods_min = 2, + .periods_max = ATI_MAX_DESCRIPTORS, +}; + +static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream, + struct atiixp_dma *dma, int pcm_type) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(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, + }; + + if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) + return -EINVAL; + + if (dma->opened) + return -EBUSY; + dma->substream = substream; + runtime->hw = snd_atiixp_pcm_hw; + dma->ac97_pcm_type = pcm_type; + err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + &hw_constraints_rates); + if (err < 0) + return err; + err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) + return err; + runtime->private_data = dma; + + /* enable DMA bits */ + spin_lock_irq(&chip->reg_lock); + dma->ops->enable_dma(chip, 1); + spin_unlock_irq(&chip->reg_lock); + dma->opened = 1; + + return 0; +} + +static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream, + struct atiixp_dma *dma) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + /* disable DMA bits */ + if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma)) + return -EINVAL; + spin_lock_irq(&chip->reg_lock); + dma->ops->enable_dma(chip, 0); + spin_unlock_irq(&chip->reg_lock); + dma->substream = NULL; + dma->opened = 0; + return 0; +} + +/* + */ +static int snd_atiixp_playback_open(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + int err; + + mutex_lock(&chip->open_mutex); + err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0); + mutex_unlock(&chip->open_mutex); + if (err < 0) + return err; + return 0; +} + +static int snd_atiixp_playback_close(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + int err; + mutex_lock(&chip->open_mutex); + err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]); + mutex_unlock(&chip->open_mutex); + return err; +} + +static int snd_atiixp_capture_open(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1); +} + +static int snd_atiixp_capture_close(struct snd_pcm_substream *substream) +{ + struct atiixp_modem *chip = snd_pcm_substream_chip(substream); + return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]); +} + + +/* AC97 playback */ +static const struct snd_pcm_ops snd_atiixp_playback_ops = { + .open = snd_atiixp_playback_open, + .close = snd_atiixp_playback_close, + .hw_params = snd_atiixp_pcm_hw_params, + .hw_free = snd_atiixp_pcm_hw_free, + .prepare = snd_atiixp_playback_prepare, + .trigger = snd_atiixp_pcm_trigger, + .pointer = snd_atiixp_pcm_pointer, +}; + +/* AC97 capture */ +static const struct snd_pcm_ops snd_atiixp_capture_ops = { + .open = snd_atiixp_capture_open, + .close = snd_atiixp_capture_close, + .hw_params = snd_atiixp_pcm_hw_params, + .hw_free = snd_atiixp_pcm_hw_free, + .prepare = snd_atiixp_capture_prepare, + .trigger = snd_atiixp_pcm_trigger, + .pointer = snd_atiixp_pcm_pointer, +}; + +static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = { + .type = ATI_DMA_PLAYBACK, + .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR, + .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR, + .enable_dma = atiixp_out_enable_dma, + .enable_transfer = atiixp_out_enable_transfer, + .flush_dma = atiixp_out_flush_dma, +}; + +static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = { + .type = ATI_DMA_CAPTURE, + .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR, + .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR, + .enable_dma = atiixp_in_enable_dma, + .enable_transfer = atiixp_in_enable_transfer, + .flush_dma = atiixp_in_flush_dma, +}; + +static int snd_atiixp_pcm_new(struct atiixp_modem *chip) +{ + struct snd_pcm *pcm; + int err; + + /* initialize constants */ + chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops; + chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops; + + /* PCM #0: analog I/O */ + err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm); + if (err < 0) + return err; + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops); + pcm->dev_class = SNDRV_PCM_CLASS_MODEM; + pcm->private_data = chip; + strcpy(pcm->name, "ATI IXP MC97"); + chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm; + + snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, + &chip->pci->dev, 64*1024, 128*1024); + + return 0; +} + + + +/* + * interrupt handler + */ +static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id) +{ + struct atiixp_modem *chip = dev_id; + unsigned int status; + + status = atiixp_read(chip, ISR); + + if (! status) + return IRQ_NONE; + + /* process audio DMA */ + if (status & ATI_REG_ISR_MODEM_OUT1_XRUN) + snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]); + else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS) + snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]); + if (status & ATI_REG_ISR_MODEM_IN_XRUN) + snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]); + else if (status & ATI_REG_ISR_MODEM_IN_STATUS) + snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]); + + /* for codec detection */ + if (status & CODEC_CHECK_BITS) { + unsigned int detected; + detected = status & CODEC_CHECK_BITS; + spin_lock(&chip->reg_lock); + chip->codec_not_ready_bits |= detected; + atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */ + spin_unlock(&chip->reg_lock); + } + + /* ack */ + atiixp_write(chip, ISR, status); + + return IRQ_HANDLED; +} + + +/* + * ac97 mixer section + */ + +static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock) +{ + struct snd_ac97_bus *pbus; + struct snd_ac97_template ac97; + int i, err; + int codec_count; + static const struct snd_ac97_bus_ops ops = { + .write = snd_atiixp_ac97_write, + .read = snd_atiixp_ac97_read, + }; + static const unsigned int codec_skip[NUM_ATI_CODECS] = { + ATI_REG_ISR_CODEC0_NOT_READY, + ATI_REG_ISR_CODEC1_NOT_READY, + ATI_REG_ISR_CODEC2_NOT_READY, + }; + + if (snd_atiixp_codec_detect(chip) < 0) + return -ENXIO; + + err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus); + if (err < 0) + return err; + pbus->clock = clock; + chip->ac97_bus = pbus; + + codec_count = 0; + for (i = 0; i < NUM_ATI_CODECS; i++) { + if (chip->codec_not_ready_bits & codec_skip[i]) + continue; + memset(&ac97, 0, sizeof(ac97)); + ac97.private_data = chip; + ac97.pci = chip->pci; + ac97.num = i; + ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; + err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i]); + if (err < 0) { + chip->ac97[i] = NULL; /* to be sure */ + dev_dbg(chip->card->dev, + "codec %d not available for modem\n", i); + continue; + } + codec_count++; + } + + if (! codec_count) { + dev_err(chip->card->dev, "no codec available\n"); + return -ENODEV; + } + + /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */ + + return 0; +} + + +#ifdef CONFIG_PM_SLEEP +/* + * power management + */ +static int snd_atiixp_suspend(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); + struct atiixp_modem *chip = card->private_data; + int i; + + snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); + for (i = 0; i < NUM_ATI_CODECS; i++) + snd_ac97_suspend(chip->ac97[i]); + snd_atiixp_aclink_down(chip); + snd_atiixp_chip_stop(chip); + return 0; +} + +static int snd_atiixp_resume(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); + struct atiixp_modem *chip = card->private_data; + int i; + + snd_atiixp_aclink_reset(chip); + snd_atiixp_chip_start(chip); + + for (i = 0; i < NUM_ATI_CODECS; i++) + snd_ac97_resume(chip->ac97[i]); + + snd_power_change_state(card, SNDRV_CTL_POWER_D0); + return 0; +} + +static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume); +#define SND_ATIIXP_PM_OPS &snd_atiixp_pm +#else +#define SND_ATIIXP_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +/* + * proc interface for register dump + */ + +static void snd_atiixp_proc_read(struct snd_info_entry *entry, + struct snd_info_buffer *buffer) +{ + struct atiixp_modem *chip = entry->private_data; + int i; + + for (i = 0; i < 256; i += 4) + snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i)); +} + +static void snd_atiixp_proc_init(struct atiixp_modem *chip) +{ + snd_card_ro_proc_new(chip->card, "atiixp-modem", chip, + snd_atiixp_proc_read); +} + + +/* + * destructor + */ + +static void snd_atiixp_free(struct snd_card *card) +{ + snd_atiixp_chip_stop(card->private_data); +} + +/* + * constructor for chip instance + */ +static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci) +{ + struct atiixp_modem *chip = card->private_data; + int err; + + err = pcim_enable_device(pci); + if (err < 0) + return err; + + spin_lock_init(&chip->reg_lock); + mutex_init(&chip->open_mutex); + chip->card = card; + chip->pci = pci; + chip->irq = -1; + err = pcim_iomap_regions(pci, 1 << 0, "ATI IXP MC97"); + if (err < 0) + return err; + chip->addr = pci_resource_start(pci, 0); + chip->remap_addr = pcim_iomap_table(pci)[0]; + + if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_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_atiixp_free; + pci_set_master(pci); + + return 0; +} + + +static int __snd_atiixp_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct snd_card *card; + struct atiixp_modem *chip; + 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; + + strcpy(card->driver, "ATIIXP-MODEM"); + strcpy(card->shortname, "ATI IXP Modem"); + err = snd_atiixp_init(card, pci); + if (err < 0) + return err; + + err = snd_atiixp_aclink_reset(chip); + if (err < 0) + return err; + + err = snd_atiixp_mixer_new(chip, ac97_clock); + if (err < 0) + return err; + + err = snd_atiixp_pcm_new(chip); + if (err < 0) + return err; + + snd_atiixp_proc_init(chip); + + snd_atiixp_chip_start(chip); + + sprintf(card->longname, "%s rev %x at 0x%lx, irq %i", + card->shortname, pci->revision, chip->addr, chip->irq); + + err = snd_card_register(card); + if (err < 0) + return err; + + pci_set_drvdata(pci, card); + return 0; +} + +static int snd_atiixp_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + return snd_card_free_on_error(&pci->dev, __snd_atiixp_probe(pci, pci_id)); +} + +static struct pci_driver atiixp_modem_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_atiixp_ids, + .probe = snd_atiixp_probe, + .driver = { + .pm = SND_ATIIXP_PM_OPS, + }, +}; + +module_pci_driver(atiixp_modem_driver); |