Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 967 insertions, 0 deletions

diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
new file mode 100644
index 000000000..54cb223ca
--- /dev/null
+++ b/sound/pci/bt87x.c
@@ -0,0 +1,967 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+static int digital_rate[SNDRV_CARDS];	/* digital input rate */
+static bool load_all;	/* allow to load cards not the allowlist */
+
+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 cards not on the allowlist");
+
+
+/* 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)
+
+/* Cards with configuration information */
+enum snd_bt87x_boardid {
+	SND_BT87X_BOARD_UNKNOWN,
+	SND_BT87X_BOARD_GENERIC,	/* both an & dig interfaces, 32kHz */
+	SND_BT87X_BOARD_ANALOG,		/* board with no external A/D */
+	SND_BT87X_BOARD_OSPREY2x0,
+	SND_BT87X_BOARD_OSPREY440,
+	SND_BT87X_BOARD_AVPHONE98,
+};
+
+/* Card configuration */
+struct snd_bt87x_board {
+	int dig_rate;		/* Digital input sampling rate */
+	u32 digital_fmt;	/* Register settings for digital input */
+	unsigned no_analog:1;	/* No analog input */
+	unsigned no_digital:1;	/* No digital input */
+};
+
+static const struct snd_bt87x_board snd_bt87x_boards[] = {
+	[SND_BT87X_BOARD_UNKNOWN] = {
+		.dig_rate = 32000, /* just a guess */
+	},
+	[SND_BT87X_BOARD_GENERIC] = {
+		.dig_rate = 32000,
+	},
+	[SND_BT87X_BOARD_ANALOG] = {
+		.no_digital = 1,
+	},
+	[SND_BT87X_BOARD_OSPREY2x0] = {
+		.dig_rate = 44100,
+		.digital_fmt = CTL_DA_LRI | (1 << CTL_DA_LRD_SHIFT),
+	},
+	[SND_BT87X_BOARD_OSPREY440] = {
+		.dig_rate = 32000,
+		.digital_fmt = CTL_DA_LRI | (1 << CTL_DA_LRD_SHIFT),
+		.no_analog = 1,
+	},
+	[SND_BT87X_BOARD_AVPHONE98] = {
+		.dig_rate = 48000,
+	},
+};
+
+struct snd_bt87x {
+	struct snd_card *card;
+	struct pci_dev *pci;
+	struct snd_bt87x_board board;
+
+	void __iomem *mmio;
+	int irq;
+
+	spinlock_t reg_lock;
+	unsigned long opened;
+	struct snd_pcm_substream *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(struct snd_bt87x *chip, u32 reg)
+{
+	return readl(chip->mmio + reg);
+}
+
+static inline void snd_bt87x_writel(struct snd_bt87x *chip, u32 reg, u32 value)
+{
+	writel(value, chip->mmio + reg);
+}
+
+static int snd_bt87x_create_risc(struct snd_bt87x *chip, struct snd_pcm_substream *substream,
+			       	 unsigned int periods, unsigned int period_bytes)
+{
+	unsigned int i, offset;
+	__le32 *risc;
+
+	if (chip->dma_risc.area == NULL) {
+		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
+					PAGE_ALIGN(MAX_RISC_SIZE), &chip->dma_risc) < 0)
+			return -ENOMEM;
+	}
+	risc = (__le32 *)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;
+			unsigned int addr;
+
+			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);
+			addr = snd_pcm_sgbuf_get_addr(substream, offset);
+			*risc++ = cpu_to_le32(addr);
+			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(struct snd_bt87x *chip)
+{
+	if (chip->dma_risc.area) {
+		snd_dma_free_pages(&chip->dma_risc);
+		chip->dma_risc.area = NULL;
+	}
+}
+
+static void snd_bt87x_pci_error(struct snd_bt87x *chip, unsigned int status)
+{
+	int pci_status = pci_status_get_and_clear_errors(chip->pci);
+
+	if (pci_status != PCI_STATUS_DETECTED_PARITY)
+		dev_err(chip->card->dev,
+			"Aieee - PCI error! status %#08x, PCI status %#04x\n",
+			   status & ERROR_INTERRUPTS, pci_status);
+	else {
+		dev_err(chip->card->dev,
+			"Aieee - PCI parity error detected!\n");
+		/* error 'handling' similar to aic7xxx_pci.c: */
+		chip->pci_parity_errors++;
+		if (chip->pci_parity_errors > 20) {
+			dev_err(chip->card->dev,
+				"Too many PCI parity errors observed.\n");
+			dev_err(chip->card->dev,
+				"Some device on this bus is generating bad parity.\n");
+			dev_err(chip->card->dev,
+				"This is an error *observed by*, not *generated by*, this card.\n");
+			dev_err(chip->card->dev,
+				"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 snd_bt87x *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))
+			dev_warn(chip->card->dev,
+				 "FIFO overrun, status %#08x\n", status);
+		if (irq_status & INT_OCERR)
+			dev_err(chip->card->dev,
+				"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 const struct snd_pcm_hardware snd_bt87x_digital_hw = {
+	.info = SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_BATCH,
+	.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 const struct snd_pcm_hardware snd_bt87x_analog_hw = {
+	.info = SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_BATCH,
+	.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(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
+{
+	chip->reg_control |= CTL_DA_IOM_DA | CTL_A_PWRDN;
+	runtime->hw = snd_bt87x_digital_hw;
+	runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->board.dig_rate);
+	runtime->hw.rate_min = chip->board.dig_rate;
+	runtime->hw.rate_max = chip->board.dig_rate;
+	return 0;
+}
+
+static int snd_bt87x_set_analog_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
+{
+	static const struct snd_ratnum analog_clock = {
+		.num = ANALOG_CLOCK,
+		.den_min = CLOCK_DIV_MIN,
+		.den_max = CLOCK_DIV_MAX,
+		.den_step = 1
+	};
+	static const struct snd_pcm_hw_constraint_ratnums constraint_rates = {
+		.nrats = 1,
+		.rats = &analog_clock
+	};
+
+	chip->reg_control &= ~(CTL_DA_IOM_DA | CTL_A_PWRDN);
+	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(struct snd_pcm_substream *substream)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *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_atomic();
+	return err;
+}
+
+static int snd_bt87x_close(struct snd_pcm_substream *substream)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+
+	spin_lock_irq(&chip->reg_lock);
+	chip->reg_control |= CTL_A_PWRDN;
+	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
+	spin_unlock_irq(&chip->reg_lock);
+
+	chip->substream = NULL;
+	clear_bit(0, &chip->opened);
+	smp_mb__after_atomic();
+	return 0;
+}
+
+static int snd_bt87x_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+
+	return snd_bt87x_create_risc(chip, substream,
+				     params_periods(hw_params),
+				     params_period_bytes(hw_params));
+}
+
+static int snd_bt87x_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+
+	snd_bt87x_free_risc(chip);
+	return 0;
+}
+
+static int snd_bt87x_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *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(struct snd_bt87x *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(struct snd_bt87x *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(struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_bt87x *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(struct snd_pcm_substream *substream)
+{
+	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
+}
+
+static const struct snd_pcm_ops snd_bt87x_pcm_ops = {
+	.open = snd_bt87x_pcm_open,
+	.close = snd_bt87x_close,
+	.hw_params = snd_bt87x_hw_params,
+	.hw_free = snd_bt87x_hw_free,
+	.prepare = snd_bt87x_prepare,
+	.trigger = snd_bt87x_trigger,
+	.pointer = snd_bt87x_pointer,
+};
+
+static int snd_bt87x_capture_volume_info(struct snd_kcontrol *kcontrol,
+					 struct snd_ctl_elem_info *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(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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 const struct snd_kcontrol_new 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,
+};
+
+#define snd_bt87x_capture_boost_info	snd_ctl_boolean_mono_info
+
+static int snd_bt87x_capture_boost_get(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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 const struct snd_kcontrol_new 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(struct snd_kcontrol *kcontrol,
+					 struct snd_ctl_elem_info *info)
+{
+	static const char *const texts[3] = {"TV Tuner", "FM", "Mic/Line"};
+
+	return snd_ctl_enum_info(info, 1, 3, texts);
+}
+
+static int snd_bt87x_capture_source_get(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *value)
+{
+	struct snd_bt87x *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 const struct snd_kcontrol_new 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(struct snd_bt87x *chip)
+{
+	if (chip->mmio)
+		snd_bt87x_stop(chip);
+	if (chip->irq >= 0)
+		free_irq(chip->irq, chip);
+	iounmap(chip->mmio);
+	pci_release_regions(chip->pci);
+	pci_disable_device(chip->pci);
+	kfree(chip);
+	return 0;
+}
+
+static int snd_bt87x_dev_free(struct snd_device *device)
+{
+	struct snd_bt87x *chip = device->device_data;
+	return snd_bt87x_free(chip);
+}
+
+static int snd_bt87x_pcm(struct snd_bt87x *chip, int device, char *name)
+{
+	int err;
+	struct snd_pcm *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);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
+				       &chip->pci->dev,
+				       128 * 1024,
+				       ALIGN(255 * 4092, 1024));
+	return 0;
+}
+
+static int snd_bt87x_create(struct snd_card *card,
+			    struct pci_dev *pci,
+			    struct snd_bt87x **rchip)
+{
+	struct snd_bt87x *chip;
+	int err;
+	static const struct snd_device_ops ops = {
+		.dev_free = snd_bt87x_dev_free
+	};
+
+	*rchip = NULL;
+
+	err = pci_enable_device(pci);
+	if (err < 0)
+		return err;
+
+	chip = kzalloc(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 = pci_ioremap_bar(pci, 0);
+	if (!chip->mmio) {
+		dev_err(card->dev, "cannot remap io memory\n");
+		err = -ENOMEM;
+		goto fail;
+	}
+
+	chip->reg_control = CTL_A_PWRDN | 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);
+
+	err = request_irq(pci->irq, snd_bt87x_interrupt, IRQF_SHARED,
+			  KBUILD_MODNAME, chip);
+	if (err < 0) {
+		dev_err(card->dev, "cannot grab irq %d\n", pci->irq);
+		goto fail;
+	}
+	chip->irq = pci->irq;
+	card->sync_irq = chip->irq;
+	pci_set_master(pci);
+
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0)
+		goto fail;
+
+	*rchip = chip;
+	return 0;
+
+fail:
+	snd_bt87x_free(chip);
+	return err;
+}
+
+#define BT_DEVICE(chip, subvend, subdev, id) \
+	{ .vendor = PCI_VENDOR_ID_BROOKTREE, \
+	  .device = chip, \
+	  .subvendor = subvend, .subdevice = subdev, \
+	  .driver_data = SND_BT87X_BOARD_ ## id }
+/* driver_data is the card id for that device */
+
+static const struct pci_device_id snd_bt87x_ids[] = {
+	/* Hauppauge WinTV series */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0x13eb, GENERIC),
+	/* Hauppauge WinTV series */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, 0x0070, 0x13eb, GENERIC),
+	/* Viewcast Osprey 200 */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff01, OSPREY2x0),
+	/* Viewcast Osprey 440 (rate is configurable via gpio) */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff07, OSPREY440),
+	/* ATI TV-Wonder */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1002, 0x0001, GENERIC),
+	/* Leadtek Winfast tv 2000xp delux */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x107d, 0x6606, GENERIC),
+	/* Pinnacle PCTV */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x11bd, 0x0012, GENERIC),
+	/* Voodoo TV 200 */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x121a, 0x3000, GENERIC),
+	/* Askey Computer Corp. MagicTView'99 */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x144f, 0x3000, GENERIC),
+	/* AVerMedia Studio No. 103, 203, ...? */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1461, 0x0003, AVPHONE98),
+	/* Prolink PixelView PV-M4900 */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1554, 0x4011, GENERIC),
+	/* Pinnacle  Studio PCTV rave */
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0xbd11, 0x1200, GENERIC),
+	{ }
+};
+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;
+} denylist[] = {
+	{0x0071, 0x0101}, /* Nebula Electronics DigiTV */
+	{0x11bd, 0x001c}, /* Pinnacle PCTV Sat */
+	{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, 0xd500}, /* DVICO FusionHDTV 5 Lite */
+	{0x18ac, 0xdb10}, /* DVICO FusionHDTV DVB-T Lite */
+	{0x18ac, 0xdb11}, /* Ultraview DVB-T Lite */
+	{0x270f, 0xfc00}, /* Chaintech Digitop DST-1000 DVB-S */
+	{0x7063, 0x2000}, /* pcHDTV HD-2000 TV */
+};
+
+static struct pci_driver driver;
+
+/* return the id of the card, or a negative value if it's on the denylist */
+static int snd_bt87x_detect_card(struct pci_dev *pci)
+{
+	int i;
+	const struct pci_device_id *supported;
+
+	supported = pci_match_id(snd_bt87x_ids, pci);
+	if (supported && supported->driver_data > 0)
+		return supported->driver_data;
+
+	for (i = 0; i < ARRAY_SIZE(denylist); ++i)
+		if (denylist[i].subvendor == pci->subsystem_vendor &&
+		    denylist[i].subdevice == pci->subsystem_device) {
+			dev_dbg(&pci->dev,
+				"card %#04x-%#04x:%#04x has no audio\n",
+				    pci->device, pci->subsystem_vendor, pci->subsystem_device);
+			return -EBUSY;
+		}
+
+	dev_info(&pci->dev, "unknown card %#04x-%#04x:%#04x\n",
+		   pci->device, pci->subsystem_vendor, pci->subsystem_device);
+	dev_info(&pci->dev, "please mail id, board name, and, "
+		   "if it works, the correct digital_rate option to "
+		   "<alsa-devel@alsa-project.org>\n");
+	return SND_BT87X_BOARD_UNKNOWN;
+}
+
+static int snd_bt87x_probe(struct pci_dev *pci,
+			   const struct pci_device_id *pci_id)
+{
+	static int dev;
+	struct snd_card *card;
+	struct snd_bt87x *chip;
+	int err;
+	enum snd_bt87x_boardid boardid;
+
+	if (!pci_id->driver_data) {
+		err = snd_bt87x_detect_card(pci);
+		if (err < 0)
+			return -ENODEV;
+		boardid = err;
+	} else
+		boardid = pci_id->driver_data;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		++dev;
+		return -ENOENT;
+	}
+
+	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+			   0, &card);
+	if (err < 0)
+		return err;
+
+	err = snd_bt87x_create(card, pci, &chip);
+	if (err < 0)
+		goto _error;
+
+	memcpy(&chip->board, &snd_bt87x_boards[boardid], sizeof(chip->board));
+
+	if (!chip->board.no_digital) {
+		if (digital_rate[dev] > 0)
+			chip->board.dig_rate = digital_rate[dev];
+
+		chip->reg_control |= chip->board.digital_fmt;
+
+		err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
+		if (err < 0)
+			goto _error;
+	}
+	if (!chip->board.no_analog) {
+		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;
+	}
+	dev_info(card->dev, "bt87x%d: Using board %d, %sanalog, %sdigital "
+		   "(rate %d Hz)\n", dev, boardid,
+		   chip->board.no_analog ? "no " : "",
+		   chip->board.no_digital ? "no " : "", chip->board.dig_rate);
+
+	strcpy(card->driver, "Bt87x");
+	sprintf(card->shortname, "Brooktree Bt%x", pci->device);
+	sprintf(card->longname, "%s at %#llx, irq %i",
+		card->shortname, (unsigned long long)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 snd_bt87x_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+}
+
+/* default entries for all Bt87x cards - it's not exported */
+/* driver_data is set to 0 to call detection */
+static const struct pci_device_id snd_bt87x_default_ids[] = {
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
+	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
+	{ }
+};
+
+static struct pci_driver driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_bt87x_ids,
+	.probe = snd_bt87x_probe,
+	.remove = snd_bt87x_remove,
+};
+
+static int __init alsa_card_bt87x_init(void)
+{
+	if (load_all)
+		driver.id_table = snd_bt87x_default_ids;
+	return pci_register_driver(&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)