Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 930 insertions, 0 deletions

diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
new file mode 100644
index 000000000000..89a7ffe5e7d7
--- /dev/null
+++ b/sound/pci/bt87x.c
@@ -0,0 +1,930 @@
+/*
+ * bt87x.c - Brooktree Bt878/Bt879 driver for ALSA
+ *
+ * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
+ *
+ * based on btaudio.c by Gerd Knorr <kraxel@bytesex.org>
+ *
+ *
+ *  This driver 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 driver 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 <sound/driver.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
+MODULE_DESCRIPTION("Brooktree Bt87x audio driver");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Brooktree,Bt878},"
+                "{Brooktree,Bt879}}");
+
+static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
+static int digital_rate[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 0 }; /* digital input rate */
+static int load_all;    /* allow to load the non-whitelisted cards */
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for Bt87x soundcard");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for Bt87x soundcard");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable Bt87x soundcard");
+module_param_array(digital_rate, int, NULL, 0444);
+MODULE_PARM_DESC(digital_rate, "Digital input rate for Bt87x soundcard");
+module_param(load_all, bool, 0444);
+MODULE_PARM_DESC(load_all, "Allow to load the non-whitelisted cards");
+
+
+#ifndef PCI_VENDOR_ID_BROOKTREE
+#define PCI_VENDOR_ID_BROOKTREE 0x109e
+#endif
+#ifndef PCI_DEVICE_ID_BROOKTREE_878
+#define PCI_DEVICE_ID_BROOKTREE_878 0x0878
+#endif
+#ifndef PCI_DEVICE_ID_BROOKTREE_879
+#define PCI_DEVICE_ID_BROOKTREE_879 0x0879
+#endif
+
+/* register offsets */
+#define REG_INT_STAT            0x100   /* interrupt status */
+#define REG_INT_MASK            0x104   /* interrupt mask */
+#define REG_GPIO_DMA_CTL        0x10c   /* audio control */
+#define REG_PACKET_LEN          0x110   /* audio packet lengths */
+#define REG_RISC_STRT_ADD       0x114   /* RISC program start address */
+#define REG_RISC_COUNT          0x120   /* RISC program counter */
+
+/* interrupt bits */
+#define INT_OFLOW       (1 <<  3)       /* audio A/D overflow */
+#define INT_RISCI       (1 << 11)       /* RISC instruction IRQ bit set */
+#define INT_FBUS        (1 << 12)       /* FIFO overrun due to bus access latency */
+#define INT_FTRGT       (1 << 13)       /* FIFO overrun due to target latency */
+#define INT_FDSR        (1 << 14)       /* FIFO data stream resynchronization */
+#define INT_PPERR       (1 << 15)       /* PCI parity error */
+#define INT_RIPERR      (1 << 16)       /* RISC instruction parity error */
+#define INT_PABORT      (1 << 17)       /* PCI master or target abort */
+#define INT_OCERR       (1 << 18)       /* invalid opcode */
+#define INT_SCERR       (1 << 19)       /* sync counter overflow */
+#define INT_RISC_EN     (1 << 27)       /* DMA controller running */
+#define INT_RISCS_SHIFT       28        /* RISC status bits */
+
+/* audio control bits */
+#define CTL_FIFO_ENABLE         (1 <<  0)       /* enable audio data FIFO */
+#define CTL_RISC_ENABLE         (1 <<  1)       /* enable audio DMA controller */
+#define CTL_PKTP_4              (0 <<  2)       /* packet mode FIFO trigger point - 4 DWORDs */
+#define CTL_PKTP_8              (1 <<  2)       /* 8 DWORDs */
+#define CTL_PKTP_16             (2 <<  2)       /* 16 DWORDs */
+#define CTL_ACAP_EN             (1 <<  4)       /* enable audio capture */
+#define CTL_DA_APP              (1 <<  5)       /* GPIO input */
+#define CTL_DA_IOM_AFE          (0 <<  6)       /* audio A/D input */
+#define CTL_DA_IOM_DA           (1 <<  6)       /* digital audio input */
+#define CTL_DA_SDR_SHIFT               8        /* DDF first stage decimation rate */
+#define CTL_DA_SDR_MASK         (0xf<< 8)
+#define CTL_DA_LMT              (1 << 12)       /* limit audio data values */
+#define CTL_DA_ES2              (1 << 13)       /* enable DDF stage 2 */
+#define CTL_DA_SBR              (1 << 14)       /* samples rounded to 8 bits */
+#define CTL_DA_DPM              (1 << 15)       /* data packet mode */
+#define CTL_DA_LRD_SHIFT              16        /* ALRCK delay */
+#define CTL_DA_MLB              (1 << 21)       /* MSB/LSB format */
+#define CTL_DA_LRI              (1 << 22)       /* left/right indication */
+#define CTL_DA_SCE              (1 << 23)       /* sample clock edge */
+#define CTL_A_SEL_STV           (0 << 24)       /* TV tuner audio input */
+#define CTL_A_SEL_SFM           (1 << 24)       /* FM audio input */
+#define CTL_A_SEL_SML           (2 << 24)       /* mic/line audio input */
+#define CTL_A_SEL_SMXC          (3 << 24)       /* MUX bypass */
+#define CTL_A_SEL_SHIFT               24
+#define CTL_A_SEL_MASK          (3 << 24)
+#define CTL_A_PWRDN             (1 << 26)       /* analog audio power-down */
+#define CTL_A_G2X               (1 << 27)       /* audio gain boost */
+#define CTL_A_GAIN_SHIFT              28        /* audio input gain */
+#define CTL_A_GAIN_MASK         (0xf<<28)
+
+/* RISC instruction opcodes */
+#define RISC_WRITE      (0x1 << 28)     /* write FIFO data to memory at address */
+#define RISC_WRITEC     (0x5 << 28)     /* write FIFO data to memory at current address */
+#define RISC_SKIP       (0x2 << 28)     /* skip FIFO data */
+#define RISC_JUMP       (0x7 << 28)     /* jump to address */
+#define RISC_SYNC       (0x8 << 28)     /* synchronize with FIFO */
+
+/* RISC instruction bits */
+#define RISC_BYTES_ENABLE       (0xf << 12)     /* byte enable bits */
+#define RISC_RESYNC             (  1 << 15)     /* disable FDSR errors */
+#define RISC_SET_STATUS_SHIFT           16      /* set status bits */
+#define RISC_RESET_STATUS_SHIFT         20      /* clear status bits */
+#define RISC_IRQ                (  1 << 24)     /* interrupt */
+#define RISC_EOL                (  1 << 26)     /* end of line */
+#define RISC_SOL                (  1 << 27)     /* start of line */
+
+/* SYNC status bits values */
+#define RISC_SYNC_FM1   0x6
+#define RISC_SYNC_VRO   0xc
+
+#define ANALOG_CLOCK 1792000
+#ifdef CONFIG_SND_BT87X_OVERCLOCK
+#define CLOCK_DIV_MIN 1
+#else
+#define CLOCK_DIV_MIN 4
+#endif
+#define CLOCK_DIV_MAX 15
+
+#define ERROR_INTERRUPTS (INT_FBUS | INT_FTRGT | INT_PPERR | \
+                          INT_RIPERR | INT_PABORT | INT_OCERR)
+#define MY_INTERRUPTS (INT_RISCI | ERROR_INTERRUPTS)
+
+/* SYNC, one WRITE per line, one extra WRITE per page boundary, SYNC, JUMP */
+#define MAX_RISC_SIZE ((1 + 255 + (PAGE_ALIGN(255 * 4092) / PAGE_SIZE - 1) + 1 + 1) * 8)
+
+typedef struct snd_bt87x bt87x_t;
+struct snd_bt87x {
+        snd_card_t *card;
+        struct pci_dev *pci;
+
+        void __iomem *mmio;
+        int irq;
+
+        int dig_rate;
+
+        spinlock_t reg_lock;
+        long opened;
+        snd_pcm_substream_t *substream;
+
+        struct snd_dma_buffer dma_risc;
+        unsigned int line_bytes;
+        unsigned int lines;
+
+        u32 reg_control;
+        u32 interrupt_mask;
+
+        int current_line;
+
+        int pci_parity_errors;
+};
+
+enum { DEVICE_DIGITAL, DEVICE_ANALOG };
+
+static inline u32 snd_bt87x_readl(bt87x_t *chip, u32 reg)
+{
+        return readl(chip->mmio + reg);
+}
+
+static inline void snd_bt87x_writel(bt87x_t *chip, u32 reg, u32 value)
+{
+        writel(value, chip->mmio + reg);
+}
+
+static int snd_bt87x_create_risc(bt87x_t *chip, snd_pcm_substream_t *substream,
+                                 unsigned int periods, unsigned int period_bytes)
+{
+        struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
+        unsigned int i, offset;
+        u32 *risc;
+
+        if (chip->dma_risc.area == NULL) {
+                if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
+                                        PAGE_ALIGN(MAX_RISC_SIZE), &chip->dma_risc) < 0)
+                        return -ENOMEM;
+        }
+        risc = (u32 *)chip->dma_risc.area;
+        offset = 0;
+        *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_FM1);
+        *risc++ = cpu_to_le32(0);
+        for (i = 0; i < periods; ++i) {
+                u32 rest;
+
+                rest = period_bytes;
+                do {
+                        u32 cmd, len;
+
+                        len = PAGE_SIZE - (offset % PAGE_SIZE);
+                        if (len > rest)
+                                len = rest;
+                        cmd = RISC_WRITE | len;
+                        if (rest == period_bytes) {
+                                u32 block = i * 16 / periods;
+                                cmd |= RISC_SOL;
+                                cmd |= block << RISC_SET_STATUS_SHIFT;
+                                cmd |= (~block & 0xf) << RISC_RESET_STATUS_SHIFT;
+                        }
+                        if (len == rest)
+                                cmd |= RISC_EOL | RISC_IRQ;
+                        *risc++ = cpu_to_le32(cmd);
+                        *risc++ = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, offset));
+                        offset += len;
+                        rest -= len;
+                } while (rest > 0);
+        }
+        *risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_VRO);
+        *risc++ = cpu_to_le32(0);
+        *risc++ = cpu_to_le32(RISC_JUMP);
+        *risc++ = cpu_to_le32(chip->dma_risc.addr);
+        chip->line_bytes = period_bytes;
+        chip->lines = periods;
+        return 0;
+}
+
+static void snd_bt87x_free_risc(bt87x_t *chip)
+{
+        if (chip->dma_risc.area) {
+                snd_dma_free_pages(&chip->dma_risc);
+                chip->dma_risc.area = NULL;
+        }
+}
+
+static void snd_bt87x_pci_error(bt87x_t *chip, unsigned int status)
+{
+        u16 pci_status;
+
+        pci_read_config_word(chip->pci, PCI_STATUS, &pci_status);
+        pci_status &= PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
+                PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
+                PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY;
+        pci_write_config_word(chip->pci, PCI_STATUS, pci_status);
+        if (pci_status != PCI_STATUS_DETECTED_PARITY)
+                snd_printk(KERN_ERR "Aieee - PCI error! status %#08x, PCI status %#04x\n",
+                           status & ERROR_INTERRUPTS, pci_status);
+        else {
+                snd_printk(KERN_ERR "Aieee - PCI parity error detected!\n");
+                /* error 'handling' similar to aic7xxx_pci.c: */
+                chip->pci_parity_errors++;
+                if (chip->pci_parity_errors > 20) {
+                        snd_printk(KERN_ERR "Too many PCI parity errors observed.\n");
+                        snd_printk(KERN_ERR "Some device on this bus is generating bad parity.\n");
+                        snd_printk(KERN_ERR "This is an error *observed by*, not *generated by*, this card.\n");
+                        snd_printk(KERN_ERR "PCI parity error checking has been disabled.\n");
+                        chip->interrupt_mask &= ~(INT_PPERR | INT_RIPERR);
+                        snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
+                }
+        }
+}
+
+static irqreturn_t snd_bt87x_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        bt87x_t *chip = dev_id;
+        unsigned int status, irq_status;
+
+        status = snd_bt87x_readl(chip, REG_INT_STAT);
+        irq_status = status & chip->interrupt_mask;
+        if (!irq_status)
+                return IRQ_NONE;
+        snd_bt87x_writel(chip, REG_INT_STAT, irq_status);
+
+        if (irq_status & ERROR_INTERRUPTS) {
+                if (irq_status & (INT_FBUS | INT_FTRGT))
+                        snd_printk(KERN_WARNING "FIFO overrun, status %#08x\n", status);
+                if (irq_status & INT_OCERR)
+                        snd_printk(KERN_ERR "internal RISC error, status %#08x\n", status);
+                if (irq_status & (INT_PPERR | INT_RIPERR | INT_PABORT))
+                        snd_bt87x_pci_error(chip, irq_status);
+        }
+        if ((irq_status & INT_RISCI) && (chip->reg_control & CTL_ACAP_EN)) {
+                int current_block, irq_block;
+
+                /* assume that exactly one line has been recorded */
+                chip->current_line = (chip->current_line + 1) % chip->lines;
+                /* but check if some interrupts have been skipped */
+                current_block = chip->current_line * 16 / chip->lines;
+                irq_block = status >> INT_RISCS_SHIFT;
+                if (current_block != irq_block)
+                        chip->current_line = (irq_block * chip->lines + 15) / 16;
+
+                snd_pcm_period_elapsed(chip->substream);
+        }
+        return IRQ_HANDLED;
+}
+
+static snd_pcm_hardware_t snd_bt87x_digital_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 = 0, /* set at runtime */
+        .channels_min = 2,
+        .channels_max = 2,
+        .buffer_bytes_max = 255 * 4092,
+        .period_bytes_min = 32,
+        .period_bytes_max = 4092,
+        .periods_min = 2,
+        .periods_max = 255,
+};
+
+static snd_pcm_hardware_t snd_bt87x_analog_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 | SNDRV_PCM_FMTBIT_S8,
+        .rates = SNDRV_PCM_RATE_KNOT,
+        .rate_min = ANALOG_CLOCK / CLOCK_DIV_MAX,
+        .rate_max = ANALOG_CLOCK / CLOCK_DIV_MIN,
+        .channels_min = 1,
+        .channels_max = 1,
+        .buffer_bytes_max = 255 * 4092,
+        .period_bytes_min = 32,
+        .period_bytes_max = 4092,
+        .periods_min = 2,
+        .periods_max = 255,
+};
+
+static int snd_bt87x_set_digital_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
+{
+        static struct {
+                int rate;
+                unsigned int bit;
+        } ratebits[] = {
+                {8000, SNDRV_PCM_RATE_8000},
+                {11025, SNDRV_PCM_RATE_11025},
+                {16000, SNDRV_PCM_RATE_16000},
+                {22050, SNDRV_PCM_RATE_22050},
+                {32000, SNDRV_PCM_RATE_32000},
+                {44100, SNDRV_PCM_RATE_44100},
+                {48000, SNDRV_PCM_RATE_48000}
+        };
+        int i;
+
+        chip->reg_control |= CTL_DA_IOM_DA;
+        runtime->hw = snd_bt87x_digital_hw;
+        runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
+        for (i = 0; i < ARRAY_SIZE(ratebits); ++i)
+                if (chip->dig_rate == ratebits[i].rate) {
+                        runtime->hw.rates = ratebits[i].bit;
+                        break;
+                }
+        runtime->hw.rate_min = chip->dig_rate;
+        runtime->hw.rate_max = chip->dig_rate;
+        return 0;
+}
+
+static int snd_bt87x_set_analog_hw(bt87x_t *chip, snd_pcm_runtime_t *runtime)
+{
+        static ratnum_t analog_clock = {
+                .num = ANALOG_CLOCK,
+                .den_min = CLOCK_DIV_MIN,
+                .den_max = CLOCK_DIV_MAX,
+                .den_step = 1
+        };
+        static snd_pcm_hw_constraint_ratnums_t constraint_rates = {
+                .nrats = 1,
+                .rats = &analog_clock
+        };
+
+        chip->reg_control &= ~CTL_DA_IOM_DA;
+        runtime->hw = snd_bt87x_analog_hw;
+        return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+                                             &constraint_rates);
+}
+
+static int snd_bt87x_pcm_open(snd_pcm_substream_t *substream)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+        snd_pcm_runtime_t *runtime = substream->runtime;
+        int err;
+
+        if (test_and_set_bit(0, &chip->opened))
+                return -EBUSY;
+
+        if (substream->pcm->device == DEVICE_DIGITAL)
+                err = snd_bt87x_set_digital_hw(chip, runtime);
+        else
+                err = snd_bt87x_set_analog_hw(chip, runtime);
+        if (err < 0)
+                goto _error;
+
+        err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+        if (err < 0)
+                goto _error;
+
+        chip->substream = substream;
+        return 0;
+
+_error:
+        clear_bit(0, &chip->opened);
+        smp_mb__after_clear_bit();
+        return err;
+}
+
+static int snd_bt87x_close(snd_pcm_substream_t *substream)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+
+        chip->substream = NULL;
+        clear_bit(0, &chip->opened);
+        smp_mb__after_clear_bit();
+        return 0;
+}
+
+static int snd_bt87x_hw_params(snd_pcm_substream_t *substream,
+                               snd_pcm_hw_params_t *hw_params)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+        int err;
+
+        err = snd_pcm_lib_malloc_pages(substream,
+                                       params_buffer_bytes(hw_params));
+        if (err < 0)
+                return err;
+        return snd_bt87x_create_risc(chip, substream,
+                                     params_periods(hw_params),
+                                     params_period_bytes(hw_params));
+}
+
+static int snd_bt87x_hw_free(snd_pcm_substream_t *substream)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+
+        snd_bt87x_free_risc(chip);
+        snd_pcm_lib_free_pages(substream);
+        return 0;
+}
+
+static int snd_bt87x_prepare(snd_pcm_substream_t *substream)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+        snd_pcm_runtime_t *runtime = substream->runtime;
+        int decimation;
+
+        spin_lock_irq(&chip->reg_lock);
+        chip->reg_control &= ~(CTL_DA_SDR_MASK | CTL_DA_SBR);
+        decimation = (ANALOG_CLOCK + runtime->rate / 4) / runtime->rate;
+        chip->reg_control |= decimation << CTL_DA_SDR_SHIFT;
+        if (runtime->format == SNDRV_PCM_FORMAT_S8)
+                chip->reg_control |= CTL_DA_SBR;
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        spin_unlock_irq(&chip->reg_lock);
+        return 0;
+}
+
+static int snd_bt87x_start(bt87x_t *chip)
+{
+        spin_lock(&chip->reg_lock);
+        chip->current_line = 0;
+        chip->reg_control |= CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN;
+        snd_bt87x_writel(chip, REG_RISC_STRT_ADD, chip->dma_risc.addr);
+        snd_bt87x_writel(chip, REG_PACKET_LEN,
+                         chip->line_bytes | (chip->lines << 16));
+        snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        spin_unlock(&chip->reg_lock);
+        return 0;
+}
+
+static int snd_bt87x_stop(bt87x_t *chip)
+{
+        spin_lock(&chip->reg_lock);
+        chip->reg_control &= ~(CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN);
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        snd_bt87x_writel(chip, REG_INT_MASK, 0);
+        snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
+        spin_unlock(&chip->reg_lock);
+        return 0;
+}
+
+static int snd_bt87x_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_START:
+                return snd_bt87x_start(chip);
+        case SNDRV_PCM_TRIGGER_STOP:
+                return snd_bt87x_stop(chip);
+        default:
+                return -EINVAL;
+        }
+}
+
+static snd_pcm_uframes_t snd_bt87x_pointer(snd_pcm_substream_t *substream)
+{
+        bt87x_t *chip = snd_pcm_substream_chip(substream);
+        snd_pcm_runtime_t *runtime = substream->runtime;
+
+        return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
+}
+
+static snd_pcm_ops_t snd_bt87x_pcm_ops = {
+        .open = snd_bt87x_pcm_open,
+        .close = snd_bt87x_close,
+        .ioctl = snd_pcm_lib_ioctl,
+        .hw_params = snd_bt87x_hw_params,
+        .hw_free = snd_bt87x_hw_free,
+        .prepare = snd_bt87x_prepare,
+        .trigger = snd_bt87x_trigger,
+        .pointer = snd_bt87x_pointer,
+        .page = snd_pcm_sgbuf_ops_page,
+};
+
+static int snd_bt87x_capture_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
+{
+        info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        info->count = 1;
+        info->value.integer.min = 0;
+        info->value.integer.max = 15;
+        return 0;
+}
+
+static int snd_bt87x_capture_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+
+        value->value.integer.value[0] = (chip->reg_control & CTL_A_GAIN_MASK) >> CTL_A_GAIN_SHIFT;
+        return 0;
+}
+
+static int snd_bt87x_capture_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+        u32 old_control;
+        int changed;
+
+        spin_lock_irq(&chip->reg_lock);
+        old_control = chip->reg_control;
+        chip->reg_control = (chip->reg_control & ~CTL_A_GAIN_MASK)
+                | (value->value.integer.value[0] << CTL_A_GAIN_SHIFT);
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        changed = old_control != chip->reg_control;
+        spin_unlock_irq(&chip->reg_lock);
+        return changed;
+}
+
+static snd_kcontrol_new_t snd_bt87x_capture_volume = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name = "Capture Volume",
+        .info = snd_bt87x_capture_volume_info,
+        .get = snd_bt87x_capture_volume_get,
+        .put = snd_bt87x_capture_volume_put,
+};
+
+static int snd_bt87x_capture_boost_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
+{
+        info->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+        info->count = 1;
+        info->value.integer.min = 0;
+        info->value.integer.max = 1;
+        return 0;
+}
+
+static int snd_bt87x_capture_boost_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+
+        value->value.integer.value[0] = !! (chip->reg_control & CTL_A_G2X);
+        return 0;
+}
+
+static int snd_bt87x_capture_boost_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+        u32 old_control;
+        int changed;
+
+        spin_lock_irq(&chip->reg_lock);
+        old_control = chip->reg_control;
+        chip->reg_control = (chip->reg_control & ~CTL_A_G2X)
+                | (value->value.integer.value[0] ? CTL_A_G2X : 0);
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        changed = chip->reg_control != old_control;
+        spin_unlock_irq(&chip->reg_lock);
+        return changed;
+}
+
+static snd_kcontrol_new_t snd_bt87x_capture_boost = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name = "Capture Boost",
+        .info = snd_bt87x_capture_boost_info,
+        .get = snd_bt87x_capture_boost_get,
+        .put = snd_bt87x_capture_boost_put,
+};
+
+static int snd_bt87x_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *info)
+{
+        static char *texts[3] = {"TV Tuner", "FM", "Mic/Line"};
+
+        info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+        info->count = 1;
+        info->value.enumerated.items = 3;
+        if (info->value.enumerated.item > 2)
+                info->value.enumerated.item = 2;
+        strcpy(info->value.enumerated.name, texts[info->value.enumerated.item]);
+        return 0;
+}
+
+static int snd_bt87x_capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+
+        value->value.enumerated.item[0] = (chip->reg_control & CTL_A_SEL_MASK) >> CTL_A_SEL_SHIFT;
+        return 0;
+}
+
+static int snd_bt87x_capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *value)
+{
+        bt87x_t *chip = snd_kcontrol_chip(kcontrol);
+        u32 old_control;
+        int changed;
+
+        spin_lock_irq(&chip->reg_lock);
+        old_control = chip->reg_control;
+        chip->reg_control = (chip->reg_control & ~CTL_A_SEL_MASK)
+                | (value->value.enumerated.item[0] << CTL_A_SEL_SHIFT);
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        changed = chip->reg_control != old_control;
+        spin_unlock_irq(&chip->reg_lock);
+        return changed;
+}
+
+static snd_kcontrol_new_t snd_bt87x_capture_source = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name = "Capture Source",
+        .info = snd_bt87x_capture_source_info,
+        .get = snd_bt87x_capture_source_get,
+        .put = snd_bt87x_capture_source_put,
+};
+
+static int snd_bt87x_free(bt87x_t *chip)
+{
+        if (chip->mmio) {
+                snd_bt87x_stop(chip);
+                if (chip->irq >= 0)
+                        synchronize_irq(chip->irq);
+
+                iounmap(chip->mmio);
+        }
+        if (chip->irq >= 0)
+                free_irq(chip->irq, chip);
+        pci_release_regions(chip->pci);
+        pci_disable_device(chip->pci);
+        kfree(chip);
+        return 0;
+}
+
+static int snd_bt87x_dev_free(snd_device_t *device)
+{
+        bt87x_t *chip = device->device_data;
+        return snd_bt87x_free(chip);
+}
+
+static int __devinit snd_bt87x_pcm(bt87x_t *chip, int device, char *name)
+{
+        int err;
+        snd_pcm_t *pcm;
+
+        err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
+        if (err < 0)
+                return err;
+        pcm->private_data = chip;
+        strcpy(pcm->name, name);
+        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_bt87x_pcm_ops);
+        return snd_pcm_lib_preallocate_pages_for_all(pcm,
+                                                     SNDRV_DMA_TYPE_DEV_SG,
+                                                     snd_dma_pci_data(chip->pci),
+                                                        128 * 1024,
+                                                        (255 * 4092 + 1023) & ~1023);
+}
+
+static int __devinit snd_bt87x_create(snd_card_t *card,
+                                      struct pci_dev *pci,
+                                      bt87x_t **rchip)
+{
+        bt87x_t *chip;
+        int err;
+        static snd_device_ops_t ops = {
+                .dev_free = snd_bt87x_dev_free
+        };
+
+        *rchip = NULL;
+
+        err = pci_enable_device(pci);
+        if (err < 0)
+                return err;
+
+        chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+        if (!chip) {
+                pci_disable_device(pci);
+                return -ENOMEM;
+        }
+        chip->card = card;
+        chip->pci = pci;
+        chip->irq = -1;
+        spin_lock_init(&chip->reg_lock);
+
+        if ((err = pci_request_regions(pci, "Bt87x audio")) < 0) {
+                kfree(chip);
+                pci_disable_device(pci);
+                return err;
+        }
+        chip->mmio = ioremap_nocache(pci_resource_start(pci, 0),
+                                     pci_resource_len(pci, 0));
+        if (!chip->mmio) {
+                snd_bt87x_free(chip);
+                snd_printk(KERN_ERR "cannot remap io memory\n");
+                return -ENOMEM;
+        }
+
+        chip->reg_control = CTL_DA_ES2 | CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT);
+        chip->interrupt_mask = MY_INTERRUPTS;
+        snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+        snd_bt87x_writel(chip, REG_INT_MASK, 0);
+        snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
+
+        if (request_irq(pci->irq, snd_bt87x_interrupt, SA_INTERRUPT | SA_SHIRQ,
+                        "Bt87x audio", chip)) {
+                snd_bt87x_free(chip);
+                snd_printk(KERN_ERR "cannot grab irq\n");
+                return -EBUSY;
+        }
+        chip->irq = pci->irq;
+        pci_set_master(pci);
+        synchronize_irq(chip->irq);
+
+        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+        if (err < 0) {
+                snd_bt87x_free(chip);
+                return err;
+        }
+        snd_card_set_dev(card, &pci->dev);
+        *rchip = chip;
+        return 0;
+}
+
+#define BT_DEVICE(chip, subvend, subdev, rate) \
+        { .vendor = PCI_VENDOR_ID_BROOKTREE, \
+          .device = PCI_DEVICE_ID_BROOKTREE_##chip, \
+          .subvendor = subvend, .subdevice = subdev, \
+          .driver_data = rate }
+
+/* driver_data is the default digital_rate value for that device */
+static struct pci_device_id snd_bt87x_ids[] = {
+        BT_DEVICE(878, 0x0070, 0x13eb, 32000), /* Hauppauge WinTV series */
+        BT_DEVICE(879, 0x0070, 0x13eb, 32000), /* Hauppauge WinTV series */
+        BT_DEVICE(878, 0x0070, 0xff01, 44100), /* Viewcast Osprey 200 */
+        { }
+};
+MODULE_DEVICE_TABLE(pci, snd_bt87x_ids);
+
+/* cards known not to have audio
+ * (DVB cards use the audio function to transfer MPEG data) */
+static struct {
+        unsigned short subvendor, subdevice;
+} blacklist[] __devinitdata = {
+        {0x0071, 0x0101}, /* Nebula Electronics DigiTV */
+        {0x11bd, 0x0026}, /* Pinnacle PCTV SAT CI */
+        {0x1461, 0x0761}, /* AVermedia AverTV DVB-T */
+        {0x1461, 0x0771}, /* AVermedia DVB-T 771 */
+        {0x1822, 0x0001}, /* Twinhan VisionPlus DVB-T */
+        {0x18ac, 0xdb10}, /* DVICO FusionHDTV DVB-T Lite */
+        {0x270f, 0xfc00}, /* Chaintech Digitop DST-1000 DVB-S */
+};
+
+/* return the rate of the card, or a negative value if it's blacklisted */
+static int __devinit snd_bt87x_detect_card(struct pci_dev *pci)
+{
+        int i;
+        const struct pci_device_id *supported;
+
+        supported = pci_match_device(snd_bt87x_ids, pci);
+        if (supported)
+                return supported->driver_data;
+
+        for (i = 0; i < ARRAY_SIZE(blacklist); ++i)
+                if (blacklist[i].subvendor == pci->subsystem_vendor &&
+                    blacklist[i].subdevice == pci->subsystem_device) {
+                        snd_printdd(KERN_INFO "card %#04x:%#04x has no audio\n",
+                                    pci->subsystem_vendor, pci->subsystem_device);
+                        return -EBUSY;
+                }
+
+        snd_printk(KERN_INFO "unknown card %#04x:%#04x, using default rate 32000\n",
+                   pci->subsystem_vendor, pci->subsystem_device);
+        snd_printk(KERN_DEBUG "please mail id, board name, and, "
+                   "if it works, the correct digital_rate option to "
+                   "<alsa-devel@lists.sf.net>\n");
+        return 32000; /* default rate */
+}
+
+static int __devinit snd_bt87x_probe(struct pci_dev *pci,
+                                     const struct pci_device_id *pci_id)
+{
+        static int dev;
+        snd_card_t *card;
+        bt87x_t *chip;
+        int err, rate;
+
+        rate = pci_id->driver_data;
+        if (! rate)
+                if ((rate = snd_bt87x_detect_card(pci)) <= 0)
+                        return -ENODEV;
+
+        if (dev >= SNDRV_CARDS)
+                return -ENODEV;
+        if (!enable[dev]) {
+                ++dev;
+                return -ENOENT;
+        }
+
+        card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+        if (!card)
+                return -ENOMEM;
+
+        err = snd_bt87x_create(card, pci, &chip);
+        if (err < 0)
+                goto _error;
+
+        if (digital_rate[dev] > 0)
+                chip->dig_rate = digital_rate[dev];
+        else
+                chip->dig_rate = rate;
+
+        err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
+        if (err < 0)
+                goto _error;
+        err = snd_bt87x_pcm(chip, DEVICE_ANALOG, "Bt87x Analog");
+        if (err < 0)
+                goto _error;
+
+        err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_volume, chip));
+        if (err < 0)
+                goto _error;
+        err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_boost, chip));
+        if (err < 0)
+                goto _error;
+        err = snd_ctl_add(card, snd_ctl_new1(&snd_bt87x_capture_source, chip));
+        if (err < 0)
+                goto _error;
+
+        strcpy(card->driver, "Bt87x");
+        sprintf(card->shortname, "Brooktree Bt%x", pci->device);
+        sprintf(card->longname, "%s at %#lx, irq %i",
+                card->shortname, pci_resource_start(pci, 0), chip->irq);
+        strcpy(card->mixername, "Bt87x");
+
+        err = snd_card_register(card);
+        if (err < 0)
+                goto _error;
+
+        pci_set_drvdata(pci, card);
+        ++dev;
+        return 0;
+
+_error:
+        snd_card_free(card);
+        return err;
+}
+
+static void __devexit snd_bt87x_remove(struct pci_dev *pci)
+{
+        snd_card_free(pci_get_drvdata(pci));
+        pci_set_drvdata(pci, NULL);
+}
+
+/* default entries for all Bt87x cards - it's not exported */
+/* driver_data is set to 0 to call detection */
+static struct pci_device_id snd_bt87x_default_ids[] = {
+        BT_DEVICE(878, PCI_ANY_ID, PCI_ANY_ID, 0),
+        BT_DEVICE(879, PCI_ANY_ID, PCI_ANY_ID, 0),
+        { }
+};
+
+static struct pci_driver driver = {
+        .name = "Bt87x",
+        .id_table = snd_bt87x_ids,
+        .probe = snd_bt87x_probe,
+        .remove = __devexit_p(snd_bt87x_remove),
+};
+
+static int __init alsa_card_bt87x_init(void)
+{
+        if (load_all)
+                driver.id_table = snd_bt87x_default_ids;
+        return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_bt87x_exit(void)
+{
+        pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_bt87x_init)
+module_exit(alsa_card_bt87x_exit)