--- /dev/null
+/*
+ * ALSA driver for ATI IXP 150/200/250/300 AC97 controllers
+ *
+ * Copyright (c) 2004 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
+ *
+ */
+
+#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 AC97 controller");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250/300/400/600}}");
+
+static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
+static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
+static int ac97_clock = 48000;
+static char *ac97_quirk;
+static bool spdif_aclink = 1;
+static int ac97_codec = -1;
+
+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).");
+module_param(ac97_quirk, charp, 0444);
+MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
+module_param(ac97_codec, int, 0444);
+MODULE_PARM_DESC(ac97_codec, "Specify codec instead of probing.");
+module_param(spdif_aclink, bool, 0444);
+MODULE_PARM_DESC(spdif_aclink, "S/PDIF over AC-link.");
+
+/* just for backward compatibility */
+static bool enable;
+module_param(enable, bool, 0444);
+
+
+/*
+ */
+
+#define ATI_REG_ISR 0x00 /* interrupt source */
+#define ATI_REG_ISR_IN_XRUN (1U<<0)
+#define ATI_REG_ISR_IN_STATUS (1U<<1)
+#define ATI_REG_ISR_OUT_XRUN (1U<<2)
+#define ATI_REG_ISR_OUT_STATUS (1U<<3)
+#define ATI_REG_ISR_SPDF_XRUN (1U<<4)
+#define ATI_REG_ISR_SPDF_STATUS (1U<<5)
+#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_IER 0x04 /* interrupt enable */
+#define ATI_REG_IER_IN_XRUN_EN (1U<<0)
+#define ATI_REG_IER_IO_STATUS_EN (1U<<1)
+#define ATI_REG_IER_OUT_XRUN_EN (1U<<2)
+#define ATI_REG_IER_OUT_XRUN_COND (1U<<3)
+#define ATI_REG_IER_SPDF_XRUN_EN (1U<<4)
+#define ATI_REG_IER_SPDF_STATUS_EN (1U<<5)
+#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_SET_BUS_BUSY (1U<<14) /* (WO) audio is running */
+
+#define ATI_REG_CMD 0x08 /* command */
+#define ATI_REG_CMD_POWERDOWN (1U<<0)
+#define ATI_REG_CMD_RECEIVE_EN (1U<<1)
+#define ATI_REG_CMD_SEND_EN (1U<<2)
+#define ATI_REG_CMD_STATUS_MEM (1U<<3)
+#define ATI_REG_CMD_SPDF_OUT_EN (1U<<4)
+#define ATI_REG_CMD_SPDF_STATUS_MEM (1U<<5)
+#define ATI_REG_CMD_SPDF_THRESHOLD (3U<<6)
+#define ATI_REG_CMD_SPDF_THRESHOLD_SHIFT 6
+#define ATI_REG_CMD_IN_DMA_EN (1U<<8)
+#define ATI_REG_CMD_OUT_DMA_EN (1U<<9)
+#define ATI_REG_CMD_SPDF_DMA_EN (1U<<10)
+#define ATI_REG_CMD_SPDF_OUT_STOPPED (1U<<11)
+#define ATI_REG_CMD_SPDF_CONFIG_MASK (7U<<12)
+#define ATI_REG_CMD_SPDF_CONFIG_34 (1U<<12)
+#define ATI_REG_CMD_SPDF_CONFIG_78 (2U<<12)
+#define ATI_REG_CMD_SPDF_CONFIG_69 (3U<<12)
+#define ATI_REG_CMD_SPDF_CONFIG_01 (4U<<12)
+#define ATI_REG_CMD_INTERLEAVE_SPDF (1U<<16)
+#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)
+#define ATI_REG_CMD_INTERLEAVE_IN (1U<<21)
+#define ATI_REG_CMD_INTERLEAVE_OUT (1U<<22)
+#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_IN_DMA_LINKPTR 0x20
+#define ATI_REG_IN_DMA_DT_START 0x24 /* RO */
+#define ATI_REG_IN_DMA_DT_NEXT 0x28 /* RO */
+#define ATI_REG_IN_DMA_DT_CUR 0x2c /* RO */
+#define ATI_REG_IN_DMA_DT_SIZE 0x30
+
+#define ATI_REG_OUT_DMA_SLOT 0x34
+#define ATI_REG_OUT_DMA_SLOT_BIT(x) (1U << ((x) - 3))
+#define ATI_REG_OUT_DMA_SLOT_MASK 0x1ff
+#define ATI_REG_OUT_DMA_THRESHOLD_MASK 0xf800
+#define ATI_REG_OUT_DMA_THRESHOLD_SHIFT 11
+
+#define ATI_REG_OUT_DMA_LINKPTR 0x38
+#define ATI_REG_OUT_DMA_DT_START 0x3c /* RO */
+#define ATI_REG_OUT_DMA_DT_NEXT 0x40 /* RO */
+#define ATI_REG_OUT_DMA_DT_CUR 0x44 /* RO */
+#define ATI_REG_OUT_DMA_DT_SIZE 0x48
+
+#define ATI_REG_SPDF_CMD 0x4c
+#define ATI_REG_SPDF_CMD_LFSR (1U<<4)
+#define ATI_REG_SPDF_CMD_SINGLE_CH (1U<<5)
+#define ATI_REG_SPDF_CMD_LFSR_ACC (0xff<<8) /* RO */
+
+#define ATI_REG_SPDF_DMA_LINKPTR 0x50
+#define ATI_REG_SPDF_DMA_DT_START 0x54 /* RO */
+#define ATI_REG_SPDF_DMA_DT_NEXT 0x58 /* RO */
+#define ATI_REG_SPDF_DMA_DT_CUR 0x5c /* RO */
+#define ATI_REG_SPDF_DMA_DT_SIZE 0x60
+
+#define ATI_REG_MODEM_MIRROR 0x7c
+#define ATI_REG_AUDIO_MIRROR 0x80
+
+#define ATI_REG_6CH_REORDER 0x84 /* reorder slots for 6ch */
+#define ATI_REG_6CH_REORDER_EN (1U<<0) /* 3,4,7,8,6,9 -> 3,4,6,9,7,8 */
+
+#define ATI_REG_FIFO_FLUSH 0x88
+#define ATI_REG_FIFO_OUT_FLUSH (1U<<0)
+#define ATI_REG_FIFO_IN_FLUSH (1U<<1)
+
+/* LINKPTR */
+#define ATI_REG_LINKPTR_EN (1U<<0)
+
+/* [INT|OUT|SPDIF]_DMA_DT_SIZE */
+#define ATI_REG_DMA_DT_SIZE (0xffffU<<0)
+#define ATI_REG_DMA_FIFO_USED (0x1fU<<16)
+#define ATI_REG_DMA_FIFO_FREE (0x1fU<<21)
+#define ATI_REG_DMA_STATE (7U<<26)
+
+
+#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */
+
+
+struct atiixp;
+
+/*
+ * DMA packate descriptor
+ */
+
+struct atiixp_dma_desc {
+ u32 addr; /* DMA buffer address */
+ u16 status; /* status bits */
+ u16 size; /* size of the packet in dwords */
+ u32 next; /* address of the next packet descriptor */
+};
+
+/*
+ * stream enum
+ */
+enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, ATI_DMA_SPDIF, NUM_ATI_DMAS }; /* DMAs */
+enum { ATI_PCM_OUT, ATI_PCM_IN, ATI_PCM_SPDIF, NUM_ATI_PCMS }; /* AC97 pcm slots */
+enum { ATI_PCMDEV_ANALOG, ATI_PCMDEV_DIGITAL, 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 *chip, int on);
+ /* called from trigger (START/STOP) */
+ void (*enable_transfer)(struct atiixp *chip, int on);
+ /* called from trigger (STOP only) */
+ void (*flush_dma)(struct atiixp *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 suspended;
+ int pcm_open_flag;
+ int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */
+ unsigned int saved_curptr;
+};
+
+/*
+ * ATI IXP chip
+ */
+struct atiixp {
+ struct snd_card *card;
+ struct pci_dev *pci;
+
+ 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, 0x4341), 0 }, /* SB200 */
+ { PCI_VDEVICE(ATI, 0x4361), 0 }, /* SB300 */
+ { PCI_VDEVICE(ATI, 0x4370), 0 }, /* SB400 */
+ { PCI_VDEVICE(ATI, 0x4382), 0 }, /* SB600 */
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
+
+static struct snd_pci_quirk atiixp_quirks[] = {
+ SND_PCI_QUIRK(0x105b, 0x0c81, "Foxconn RC4107MA-RS2", 0),
+ SND_PCI_QUIRK(0x15bd, 0x3100, "DFI RS482", 0),
+ { } /* terminator */
+};
+
+/*
+ * lowlevel functions
+ */
+
+/*
+ * update the bits of the given register.
+ * return 1 if the bits changed.
+ */
+static int snd_atiixp_update_bits(struct atiixp *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 *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,
+ snd_dma_pci_data(chip->pci),
+ 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 *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 *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 *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 *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 *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 *chip = ac97->private_data;
+ snd_atiixp_codec_write(chip, ac97->num, reg, val);
+}
+
+/*
+ * reset AC link
+ */
+static int snd_atiixp_aclink_reset(struct atiixp *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);
+ mdelay(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 *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 ac97_probing_bugs(struct pci_dev *pci)
+{
+ const struct snd_pci_quirk *q;
+
+ q = snd_pci_quirk_lookup(pci, atiixp_quirks);
+ if (q) {
+ dev_dbg(&pci->dev, "atiixp quirk for %s. Forcing codec %d\n",
+ snd_pci_quirk_name(q), q->value);
+ return q->value;
+ }
+ /* this hardware doesn't need workarounds. Probe for codec */
+ return -1;
+}
+
+static int snd_atiixp_codec_detect(struct atiixp *chip)
+{
+ int timeout;
+
+ chip->codec_not_ready_bits = 0;
+ if (ac97_codec == -1)
+ ac97_codec = ac97_probing_bugs(chip->pci);
+ if (ac97_codec >= 0) {
+ chip->codec_not_ready_bits |=
+ CODEC_CHECK_BITS ^ (1 << (ac97_codec + 10));
+ return 0;
+ }
+
+ atiixp_write(chip, IER, CODEC_CHECK_BITS);
+ /* wait for the interrupts */
+ timeout = 50;
+ while (timeout-- > 0) {
+ mdelay(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 *chip)
+{
+ unsigned int reg;
+
+ /* set up spdif, enable burst mode */
+ reg = atiixp_read(chip, CMD);
+ reg |= 0x02 << ATI_REG_CMD_SPDF_THRESHOLD_SHIFT;
+ reg |= ATI_REG_CMD_BURST_EN;
+ atiixp_write(chip, CMD, reg);
+
+ reg = atiixp_read(chip, SPDF_CMD);
+ reg &= ~(ATI_REG_SPDF_CMD_LFSR|ATI_REG_SPDF_CMD_SINGLE_CH);
+ atiixp_write(chip, SPDF_CMD, reg);
+
+ /* clear all interrupt source */
+ atiixp_write(chip, ISR, 0xffffffff);
+ /* enable irqs */
+ atiixp_write(chip, IER,
+ ATI_REG_IER_IO_STATUS_EN |
+ ATI_REG_IER_IN_XRUN_EN |
+ ATI_REG_IER_OUT_XRUN_EN |
+ ATI_REG_IER_SPDF_XRUN_EN |
+ ATI_REG_IER_SPDF_STATUS_EN);
+ return 0;
+}
+
+
+/*
+ * disable DMA and IRQs
+ */
+static int snd_atiixp_chip_stop(struct atiixp *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 *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 *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 *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 *chip)
+{
+ unsigned int bus_busy;
+ if (atiixp_read(chip, CMD) & (ATI_REG_CMD_SEND_EN |
+ ATI_REG_CMD_RECEIVE_EN |
+ ATI_REG_CMD_SPDF_OUT_EN))
+ bus_busy = ATI_REG_IER_SET_BUS_BUSY;
+ else
+ bus_busy = 0;
+ atiixp_update(chip, IER, ATI_REG_IER_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 *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:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ dma->ops->enable_transfer(chip, 1);
+ dma->running = 1;
+ dma->suspended = 0;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ dma->ops->enable_transfer(chip, 0);
+ dma->running = 0;
+ dma->suspended = cmd == SNDRV_PCM_TRIGGER_SUSPEND;
+ 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 *chip)
+{
+ atiixp_write(chip, FIFO_FLUSH, ATI_REG_FIFO_OUT_FLUSH);
+}
+
+/* enable/disable analog OUT DMA */
+static void atiixp_out_enable_dma(struct atiixp *chip, int on)
+{
+ unsigned int data;
+ data = atiixp_read(chip, CMD);
+ if (on) {
+ if (data & ATI_REG_CMD_OUT_DMA_EN)
+ return;
+ atiixp_out_flush_dma(chip);
+ data |= ATI_REG_CMD_OUT_DMA_EN;
+ } else
+ data &= ~ATI_REG_CMD_OUT_DMA_EN;
+ atiixp_write(chip, CMD, data);
+}
+
+/* start/stop transfer over OUT DMA */
+static void atiixp_out_enable_transfer(struct atiixp *chip, int on)
+{
+ atiixp_update(chip, CMD, ATI_REG_CMD_SEND_EN,
+ on ? ATI_REG_CMD_SEND_EN : 0);
+}
+
+/* enable/disable analog IN DMA */
+static void atiixp_in_enable_dma(struct atiixp *chip, int on)
+{
+ atiixp_update(chip, CMD, ATI_REG_CMD_IN_DMA_EN,
+ on ? ATI_REG_CMD_IN_DMA_EN : 0);
+}
+
+/* start/stop analog IN DMA */
+static void atiixp_in_enable_transfer(struct atiixp *chip, int on)
+{
+ if (on) {
+ unsigned int data = atiixp_read(chip, CMD);
+ if (! (data & ATI_REG_CMD_RECEIVE_EN)) {
+ data |= ATI_REG_CMD_RECEIVE_EN;
+#if 0 /* FIXME: this causes the endless loop */
+ /* wait until slot 3/4 are finished */
+ while ((atiixp_read(chip, COUNTER) &
+ ATI_REG_COUNTER_SLOT) != 5)
+ ;
+#endif
+ atiixp_write(chip, CMD, data);
+ }
+ } else
+ atiixp_update(chip, CMD, ATI_REG_CMD_RECEIVE_EN, 0);
+}
+
+/* flush FIFO of analog IN DMA */
+static void atiixp_in_flush_dma(struct atiixp *chip)
+{
+ atiixp_write(chip, FIFO_FLUSH, ATI_REG_FIFO_IN_FLUSH);
+}
+
+/* enable/disable SPDIF OUT DMA */
+static void atiixp_spdif_enable_dma(struct atiixp *chip, int on)
+{
+ atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_DMA_EN,
+ on ? ATI_REG_CMD_SPDF_DMA_EN : 0);
+}
+
+/* start/stop SPDIF OUT DMA */
+static void atiixp_spdif_enable_transfer(struct atiixp *chip, int on)
+{
+ unsigned int data;
+ data = atiixp_read(chip, CMD);
+ if (on)
+ data |= ATI_REG_CMD_SPDF_OUT_EN;
+ else
+ data &= ~ATI_REG_CMD_SPDF_OUT_EN;
+ atiixp_write(chip, CMD, data);
+}
+
+/* flush FIFO of SPDIF OUT DMA */
+static void atiixp_spdif_flush_dma(struct atiixp *chip)
+{
+ int timeout;
+
+ /* DMA off, transfer on */
+ atiixp_spdif_enable_dma(chip, 0);
+ atiixp_spdif_enable_transfer(chip, 1);
+
+ timeout = 100;
+ do {
+ if (! (atiixp_read(chip, SPDF_DMA_DT_SIZE) & ATI_REG_DMA_FIFO_USED))
+ break;
+ udelay(1);
+ } while (timeout-- > 0);
+
+ atiixp_spdif_enable_transfer(chip, 0);
+}
+
+/* set up slots and formats for SPDIF OUT */
+static int snd_atiixp_spdif_prepare(struct snd_pcm_substream *substream)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+
+ spin_lock_irq(&chip->reg_lock);
+ if (chip->spdif_over_aclink) {
+ unsigned int data;
+ /* enable slots 10/11 */
+ atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_CONFIG_MASK,
+ ATI_REG_CMD_SPDF_CONFIG_01);
+ data = atiixp_read(chip, OUT_DMA_SLOT) & ~ATI_REG_OUT_DMA_SLOT_MASK;
+ data |= ATI_REG_OUT_DMA_SLOT_BIT(10) |
+ ATI_REG_OUT_DMA_SLOT_BIT(11);
+ data |= 0x04 << ATI_REG_OUT_DMA_THRESHOLD_SHIFT;
+ atiixp_write(chip, OUT_DMA_SLOT, data);
+ atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_OUT,
+ substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
+ ATI_REG_CMD_INTERLEAVE_OUT : 0);
+ } else {
+ atiixp_update(chip, CMD, ATI_REG_CMD_SPDF_CONFIG_MASK, 0);
+ atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_SPDF, 0);
+ }
+ spin_unlock_irq(&chip->reg_lock);
+ return 0;
+}
+
+/* set up slots and formats for analog OUT */
+static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+ unsigned int data;
+
+ spin_lock_irq(&chip->reg_lock);
+ data = atiixp_read(chip, OUT_DMA_SLOT) & ~ATI_REG_OUT_DMA_SLOT_MASK;
+ switch (substream->runtime->channels) {
+ case 8:
+ data |= ATI_REG_OUT_DMA_SLOT_BIT(10) |
+ ATI_REG_OUT_DMA_SLOT_BIT(11);
+ /* fallthru */
+ case 6:
+ data |= ATI_REG_OUT_DMA_SLOT_BIT(7) |
+ ATI_REG_OUT_DMA_SLOT_BIT(8);
+ /* fallthru */
+ case 4:
+ data |= ATI_REG_OUT_DMA_SLOT_BIT(6) |
+ ATI_REG_OUT_DMA_SLOT_BIT(9);
+ /* fallthru */
+ default:
+ data |= ATI_REG_OUT_DMA_SLOT_BIT(3) |
+ ATI_REG_OUT_DMA_SLOT_BIT(4);
+ break;
+ }
+
+ /* set output threshold */
+ data |= 0x04 << ATI_REG_OUT_DMA_THRESHOLD_SHIFT;
+ atiixp_write(chip, OUT_DMA_SLOT, data);
+
+ atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_OUT,
+ substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
+ ATI_REG_CMD_INTERLEAVE_OUT : 0);
+
+ /*
+ * enable 6 channel re-ordering bit if needed
+ */
+ atiixp_update(chip, 6CH_REORDER, ATI_REG_6CH_REORDER_EN,
+ substream->runtime->channels >= 6 ? ATI_REG_6CH_REORDER_EN: 0);
+
+ 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)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+
+ spin_lock_irq(&chip->reg_lock);
+ atiixp_update(chip, CMD, ATI_REG_CMD_INTERLEAVE_IN,
+ substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE ?
+ ATI_REG_CMD_INTERLEAVE_IN : 0);
+ spin_unlock_irq(&chip->reg_lock);
+ 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 *chip = snd_pcm_substream_chip(substream);
+ struct atiixp_dma *dma = substream->runtime->private_data;
+ int err;
+
+ err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+ if (err < 0)
+ return err;
+ 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;
+
+ if (dma->ac97_pcm_type >= 0) {
+ struct ac97_pcm *pcm = chip->pcms[dma->ac97_pcm_type];
+ /* PCM is bound to AC97 codec(s)
+ * set up the AC97 codecs
+ */
+ if (dma->pcm_open_flag) {
+ snd_ac97_pcm_close(pcm);
+ dma->pcm_open_flag = 0;
+ }
+ err = snd_ac97_pcm_open(pcm, params_rate(hw_params),
+ params_channels(hw_params),
+ pcm->r[0].slots);
+ if (err >= 0)
+ dma->pcm_open_flag = 1;
+ }
+
+ return err;
+}
+
+static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+ struct atiixp_dma *dma = substream->runtime->private_data;
+
+ if (dma->pcm_open_flag) {
+ struct ac97_pcm *pcm = chip->pcms[dma->ac97_pcm_type];
+ snd_ac97_pcm_close(pcm);
+ dma->pcm_open_flag = 0;
+ }
+ atiixp_clear_dma_packets(chip, dma, substream);
+ snd_pcm_lib_free_pages(substream);
+ return 0;
+}
+
+
+/*
+ * pcm hardware definition, identical for all DMA types
+ */
+static 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_PAUSE |
+ SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .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 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int err;
+
+ 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;
+ if (pcm_type >= 0) {
+ runtime->hw.rates = chip->pcms[pcm_type]->rates;
+ snd_pcm_limit_hw_rates(runtime);
+ } else {
+ /* direct SPDIF */
+ runtime->hw.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
+ }
+ if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 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 *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 *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;
+ substream->runtime->hw.channels_max = chip->max_channels;
+ if (chip->max_channels > 2)
+ /* channels must be even */
+ snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+ return 0;
+}
+
+static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
+{
+ struct atiixp *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 *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 *chip = snd_pcm_substream_chip(substream);
+ return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
+}
+
+static int snd_atiixp_spdif_open(struct snd_pcm_substream *substream)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+ int err;
+ mutex_lock(&chip->open_mutex);
+ if (chip->spdif_over_aclink) /* share DMA_PLAYBACK */
+ err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 2);
+ else
+ err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_SPDIF], -1);
+ mutex_unlock(&chip->open_mutex);
+ return err;
+}
+
+static int snd_atiixp_spdif_close(struct snd_pcm_substream *substream)
+{
+ struct atiixp *chip = snd_pcm_substream_chip(substream);
+ int err;
+ mutex_lock(&chip->open_mutex);
+ if (chip->spdif_over_aclink)
+ err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
+ else
+ err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_SPDIF]);
+ mutex_unlock(&chip->open_mutex);
+ return err;
+}
+
+/* AC97 playback */
+static struct snd_pcm_ops snd_atiixp_playback_ops = {
+ .open = snd_atiixp_playback_open,
+ .close = snd_atiixp_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .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 struct snd_pcm_ops snd_atiixp_capture_ops = {
+ .open = snd_atiixp_capture_open,
+ .close = snd_atiixp_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .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,
+};
+
+/* SPDIF playback */
+static struct snd_pcm_ops snd_atiixp_spdif_ops = {
+ .open = snd_atiixp_spdif_open,
+ .close = snd_atiixp_spdif_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_atiixp_pcm_hw_params,
+ .hw_free = snd_atiixp_pcm_hw_free,
+ .prepare = snd_atiixp_spdif_prepare,
+ .trigger = snd_atiixp_pcm_trigger,
+ .pointer = snd_atiixp_pcm_pointer,
+};
+
+static struct ac97_pcm atiixp_pcm_defs[] = {
+ /* front PCM */
+ {
+ .exclusive = 1,
+ .r = { {
+ .slots = (1 << AC97_SLOT_PCM_LEFT) |
+ (1 << AC97_SLOT_PCM_RIGHT) |
+ (1 << AC97_SLOT_PCM_CENTER) |
+ (1 << AC97_SLOT_PCM_SLEFT) |
+ (1 << AC97_SLOT_PCM_SRIGHT) |
+ (1 << AC97_SLOT_LFE)
+ }
+ }
+ },
+ /* PCM IN #1 */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = (1 << AC97_SLOT_PCM_LEFT) |
+ (1 << AC97_SLOT_PCM_RIGHT)
+ }
+ }
+ },
+ /* S/PDIF OUT (optional) */
+ {
+ .exclusive = 1,
+ .spdif = 1,
+ .r = { {
+ .slots = (1 << AC97_SLOT_SPDIF_LEFT2) |
+ (1 << AC97_SLOT_SPDIF_RIGHT2)
+ }
+ }
+ },
+};
+
+static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
+ .type = ATI_DMA_PLAYBACK,
+ .llp_offset = ATI_REG_OUT_DMA_LINKPTR,
+ .dt_cur = ATI_REG_OUT_DMA_DT_CUR,
+ .enable_dma = atiixp_out_enable_dma,
+ .enable_transfer = atiixp_out_enable_transfer,
+ .flush_dma = atiixp_out_flush_dma,
+};
+
+static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
+ .type = ATI_DMA_CAPTURE,
+ .llp_offset = ATI_REG_IN_DMA_LINKPTR,
+ .dt_cur = ATI_REG_IN_DMA_DT_CUR,
+ .enable_dma = atiixp_in_enable_dma,
+ .enable_transfer = atiixp_in_enable_transfer,
+ .flush_dma = atiixp_in_flush_dma,
+};
+
+static struct atiixp_dma_ops snd_atiixp_spdif_dma_ops = {
+ .type = ATI_DMA_SPDIF,
+ .llp_offset = ATI_REG_SPDF_DMA_LINKPTR,
+ .dt_cur = ATI_REG_SPDF_DMA_DT_CUR,
+ .enable_dma = atiixp_spdif_enable_dma,
+ .enable_transfer = atiixp_spdif_enable_transfer,
+ .flush_dma = atiixp_spdif_flush_dma,
+};
+
+
+static int snd_atiixp_pcm_new(struct atiixp *chip)
+{
+ struct snd_pcm *pcm;
+ struct snd_pcm_chmap *chmap;
+ struct snd_ac97_bus *pbus = chip->ac97_bus;
+ int err, i, num_pcms;
+
+ /* initialize constants */
+ chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
+ chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
+ if (! chip->spdif_over_aclink)
+ chip->dmas[ATI_DMA_SPDIF].ops = &snd_atiixp_spdif_dma_ops;
+
+ /* assign AC97 pcm */
+ if (chip->spdif_over_aclink)
+ num_pcms = 3;
+ else
+ num_pcms = 2;
+ err = snd_ac97_pcm_assign(pbus, num_pcms, atiixp_pcm_defs);
+ if (err < 0)
+ return err;
+ for (i = 0; i < num_pcms; i++)
+ chip->pcms[i] = &pbus->pcms[i];
+
+ chip->max_channels = 2;
+ if (pbus->pcms[ATI_PCM_OUT].r[0].slots & (1 << AC97_SLOT_PCM_SLEFT)) {
+ if (pbus->pcms[ATI_PCM_OUT].r[0].slots & (1 << AC97_SLOT_LFE))
+ chip->max_channels = 6;
+ else
+ chip->max_channels = 4;
+ }
+
+ /* PCM #0: analog I/O */
+ err = snd_pcm_new(chip->card, "ATI IXP AC97",
+ 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->private_data = chip;
+ strcpy(pcm->name, "ATI IXP AC97");
+ chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(chip->pci),
+ 64*1024, 128*1024);
+
+ err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ snd_pcm_alt_chmaps, chip->max_channels, 0,
+ &chmap);
+ if (err < 0)
+ return err;
+ chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
+ chip->ac97[0]->chmaps[SNDRV_PCM_STREAM_PLAYBACK] = chmap;
+
+ /* no SPDIF support on codec? */
+ if (chip->pcms[ATI_PCM_SPDIF] && ! chip->pcms[ATI_PCM_SPDIF]->rates)
+ return 0;
+
+ /* FIXME: non-48k sample rate doesn't work on my test machine with AD1888 */
+ if (chip->pcms[ATI_PCM_SPDIF])
+ chip->pcms[ATI_PCM_SPDIF]->rates = SNDRV_PCM_RATE_48000;
+
+ /* PCM #1: spdif playback */
+ err = snd_pcm_new(chip->card, "ATI IXP IEC958",
+ ATI_PCMDEV_DIGITAL, 1, 0, &pcm);
+ if (err < 0)
+ return err;
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_spdif_ops);
+ pcm->private_data = chip;
+ if (chip->spdif_over_aclink)
+ strcpy(pcm->name, "ATI IXP IEC958 (AC97)");
+ else
+ strcpy(pcm->name, "ATI IXP IEC958 (Direct)");
+ chip->pcmdevs[ATI_PCMDEV_DIGITAL] = pcm;
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(chip->pci),
+ 64*1024, 128*1024);
+
+ /* pre-select AC97 SPDIF slots 10/11 */
+ for (i = 0; i < NUM_ATI_CODECS; i++) {
+ if (chip->ac97[i])
+ snd_ac97_update_bits(chip->ac97[i],
+ AC97_EXTENDED_STATUS,
+ 0x03 << 4, 0x03 << 4);
+ }
+
+ return 0;
+}
+
+
+
+/*
+ * interrupt handler
+ */
+static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
+{
+ struct atiixp *chip = dev_id;
+ unsigned int status;
+
+ status = atiixp_read(chip, ISR);
+
+ if (! status)
+ return IRQ_NONE;
+
+ /* process audio DMA */
+ if (status & ATI_REG_ISR_OUT_XRUN)
+ snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
+ else if (status & ATI_REG_ISR_OUT_STATUS)
+ snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
+ if (status & ATI_REG_ISR_IN_XRUN)
+ snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
+ else if (status & ATI_REG_ISR_IN_STATUS)
+ snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
+ if (! chip->spdif_over_aclink) {
+ if (status & ATI_REG_ISR_SPDF_XRUN)
+ snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_SPDIF]);
+ else if (status & ATI_REG_ISR_SPDF_STATUS)
+ snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_SPDIF]);
+ }
+
+ /* 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 const struct ac97_quirk ac97_quirks[] = {
+ {
+ .subvendor = 0x103c,
+ .subdevice = 0x006b,
+ .name = "HP Pavilion ZV5030US",
+ .type = AC97_TUNE_MUTE_LED
+ },
+ {
+ .subvendor = 0x103c,
+ .subdevice = 0x308b,
+ .name = "HP nx6125",
+ .type = AC97_TUNE_MUTE_LED
+ },
+ {
+ .subvendor = 0x103c,
+ .subdevice = 0x3091,
+ .name = "unknown HP",
+ .type = AC97_TUNE_MUTE_LED
+ },
+ { } /* terminator */
+};
+
+static int snd_atiixp_mixer_new(struct atiixp *chip, int clock,
+ const char *quirk_override)
+{
+ struct snd_ac97_bus *pbus;
+ struct snd_ac97_template ac97;
+ int i, err;
+ int codec_count;
+ static struct snd_ac97_bus_ops ops = {
+ .write = snd_atiixp_ac97_write,
+ .read = snd_atiixp_ac97_read,
+ };
+ static 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;
+
+ if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 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_MODEM | AC97_SCAP_POWER_SAVE;
+ if (! chip->spdif_over_aclink)
+ ac97.scaps |= AC97_SCAP_NO_SPDIF;
+ if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
+ chip->ac97[i] = NULL; /* to be sure */
+ dev_dbg(chip->card->dev,
+ "codec %d not available for audio\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[0], ac97_quirks, quirk_override);
+
+ 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 *chip = card->private_data;
+ int i;
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+ for (i = 0; i < NUM_ATI_PCMDEVS; i++)
+ if (chip->pcmdevs[i]) {
+ struct atiixp_dma *dma = &chip->dmas[i];
+ if (dma->substream && dma->running)
+ dma->saved_curptr = readl(chip->remap_addr +
+ dma->ops->dt_cur);
+ snd_pcm_suspend_all(chip->pcmdevs[i]);
+ }
+ 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 *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]);
+
+ for (i = 0; i < NUM_ATI_PCMDEVS; i++)
+ if (chip->pcmdevs[i]) {
+ struct atiixp_dma *dma = &chip->dmas[i];
+ if (dma->substream && dma->suspended) {
+ dma->ops->enable_dma(chip, 1);
+ dma->substream->ops->prepare(dma->substream);
+ writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
+ chip->remap_addr + dma->ops->llp_offset);
+ writel(dma->saved_curptr, chip->remap_addr +
+ dma->ops->dt_cur);
+ }
+ }
+
+ 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 */
+
+
+#ifdef CONFIG_PROC_FS
+/*
+ * proc interface for register dump
+ */
+
+static void snd_atiixp_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct atiixp *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 *chip)
+{
+ struct snd_info_entry *entry;
+
+ if (! snd_card_proc_new(chip->card, "atiixp", &entry))
+ snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
+}
+#else /* !CONFIG_PROC_FS */
+#define snd_atiixp_proc_init(chip)
+#endif
+
+
+/*
+ * destructor
+ */
+
+static int snd_atiixp_free(struct atiixp *chip)
+{
+ if (chip->irq < 0)
+ goto __hw_end;
+ snd_atiixp_chip_stop(chip);
+
+ __hw_end:
+ if (chip->irq >= 0)
+ free_irq(chip->irq, chip);
+ iounmap(chip->remap_addr);
+ pci_release_regions(chip->pci);
+ pci_disable_device(chip->pci);
+ kfree(chip);
+ return 0;
+}
+
+static int snd_atiixp_dev_free(struct snd_device *device)
+{
+ struct atiixp *chip = device->device_data;
+ return snd_atiixp_free(chip);
+}
+
+/*
+ * constructor for chip instance
+ */
+static int snd_atiixp_create(struct snd_card *card,
+ struct pci_dev *pci,
+ struct atiixp **r_chip)
+{
+ static struct snd_device_ops ops = {
+ .dev_free = snd_atiixp_dev_free,
+ };
+ struct atiixp *chip;
+ int err;
+
+ if ((err = pci_enable_device(pci)) < 0)
+ return err;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL) {
+ pci_disable_device(pci);
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&chip->reg_lock);
+ mutex_init(&chip->open_mutex);
+ chip->card = card;
+ chip->pci = pci;
+ chip->irq = -1;
+ if ((err = pci_request_regions(pci, "ATI IXP AC97")) < 0) {
+ pci_disable_device(pci);
+ kfree(chip);
+ return err;
+ }
+ chip->addr = pci_resource_start(pci, 0);
+ chip->remap_addr = pci_ioremap_bar(pci, 0);
+ if (chip->remap_addr == NULL) {
+ dev_err(card->dev, "AC'97 space ioremap problem\n");
+ snd_atiixp_free(chip);
+ return -EIO;
+ }
+
+ if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
+ KBUILD_MODNAME, chip)) {
+ dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
+ snd_atiixp_free(chip);
+ return -EBUSY;
+ }
+ chip->irq = pci->irq;
+ pci_set_master(pci);
+ synchronize_irq(chip->irq);
+
+ if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+ snd_atiixp_free(chip);
+ return err;
+ }
+
+ *r_chip = chip;
+ return 0;
+}
+
+
+static int snd_atiixp_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ struct snd_card *card;
+ struct atiixp *chip;
+ int err;
+
+ err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
+ if (err < 0)
+ return err;
+
+ strcpy(card->driver, spdif_aclink ? "ATIIXP" : "ATIIXP-SPDMA");
+ strcpy(card->shortname, "ATI IXP");
+ if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
+ goto __error;
+ card->private_data = chip;
+
+ if ((err = snd_atiixp_aclink_reset(chip)) < 0)
+ goto __error;
+
+ chip->spdif_over_aclink = spdif_aclink;
+
+ if ((err = snd_atiixp_mixer_new(chip, ac97_clock, ac97_quirk)) < 0)
+ goto __error;
+
+ if ((err = snd_atiixp_pcm_new(chip)) < 0)
+ goto __error;
+
+ snd_atiixp_proc_init(chip);
+
+ snd_atiixp_chip_start(chip);
+
+ snprintf(card->longname, sizeof(card->longname),
+ "%s rev %x with %s at %#lx, irq %i", card->shortname,
+ pci->revision,
+ chip->ac97[0] ? snd_ac97_get_short_name(chip->ac97[0]) : "?",
+ chip->addr, chip->irq);
+
+ if ((err = snd_card_register(card)) < 0)
+ goto __error;
+
+ pci_set_drvdata(pci, card);
+ return 0;
+
+ __error:
+ snd_card_free(card);
+ return err;
+}
+
+static void snd_atiixp_remove(struct pci_dev *pci)
+{
+ snd_card_free(pci_get_drvdata(pci));
+}
+
+static struct pci_driver atiixp_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_atiixp_ids,
+ .probe = snd_atiixp_probe,
+ .remove = snd_atiixp_remove,
+ .driver = {
+ .pm = SND_ATIIXP_PM_OPS,
+ },
+};
+
+module_pci_driver(atiixp_driver);
Code Review / kvmfornfv.git / blobdiff