ALSA: hda - Relocate RIRB/CORB interface to hda_controller

This is done to allow an HDA platform driver to reuse the code.

A few of the interfaces added to hda_controller will disappear in
following commits as their users are also moved to hda_controller.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 0 insertions, 383 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 80250b3a6fc3..a8af3d4ca4be 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -335,389 +335,6 @@ static inline void mark_runtime_wc(struct azx *chip, struct azx_dev *azx_dev,
 #endif
 
 static int azx_acquire_irq(struct azx *chip, int do_disconnect);
-static int azx_send_cmd(struct hda_bus *bus, unsigned int val);
-/*
- * Interface for HD codec
- */
-
-/*
- * CORB / RIRB interface
- */
-static int azx_alloc_cmd_io(struct azx *chip)
-{
-	int err;
-
-	/* single page (at least 4096 bytes) must suffice for both ringbuffes */
-	err = chip->ops->dma_alloc_pages(chip, SNDRV_DMA_TYPE_DEV,
-					 PAGE_SIZE, &chip->rb);
-	if (err < 0)
-		dev_err(chip->card->dev, "cannot allocate CORB/RIRB\n");
-	return err;
-}
-
-static void azx_init_cmd_io(struct azx *chip)
-{
-	int timeout;
-
-	spin_lock_irq(&chip->reg_lock);
-	/* CORB set up */
-	chip->corb.addr = chip->rb.addr;
-	chip->corb.buf = (u32 *)chip->rb.area;
-	azx_writel(chip, CORBLBASE, (u32)chip->corb.addr);
-	azx_writel(chip, CORBUBASE, upper_32_bits(chip->corb.addr));
-
-	/* set the corb size to 256 entries (ULI requires explicitly) */
-	azx_writeb(chip, CORBSIZE, 0x02);
-	/* set the corb write pointer to 0 */
-	azx_writew(chip, CORBWP, 0);
-
-	/* reset the corb hw read pointer */
-	azx_writew(chip, CORBRP, ICH6_CORBRP_RST);
-	for (timeout = 1000; timeout > 0; timeout--) {
-		if ((azx_readw(chip, CORBRP) & ICH6_CORBRP_RST) == ICH6_CORBRP_RST)
-			break;
-		udelay(1);
-	}
-	if (timeout <= 0)
-		dev_err(chip->card->dev, "CORB reset timeout#1, CORBRP = %d\n",
-			azx_readw(chip, CORBRP));
-
-	azx_writew(chip, CORBRP, 0);
-	for (timeout = 1000; timeout > 0; timeout--) {
-		if (azx_readw(chip, CORBRP) == 0)
-			break;
-		udelay(1);
-	}
-	if (timeout <= 0)
-		dev_err(chip->card->dev, "CORB reset timeout#2, CORBRP = %d\n",
-			azx_readw(chip, CORBRP));
-
-	/* enable corb dma */
-	azx_writeb(chip, CORBCTL, ICH6_CORBCTL_RUN);
-
-	/* RIRB set up */
-	chip->rirb.addr = chip->rb.addr + 2048;
-	chip->rirb.buf = (u32 *)(chip->rb.area + 2048);
-	chip->rirb.wp = chip->rirb.rp = 0;
-	memset(chip->rirb.cmds, 0, sizeof(chip->rirb.cmds));
-	azx_writel(chip, RIRBLBASE, (u32)chip->rirb.addr);
-	azx_writel(chip, RIRBUBASE, upper_32_bits(chip->rirb.addr));
-
-	/* set the rirb size to 256 entries (ULI requires explicitly) */
-	azx_writeb(chip, RIRBSIZE, 0x02);
-	/* reset the rirb hw write pointer */
-	azx_writew(chip, RIRBWP, ICH6_RIRBWP_RST);
-	/* set N=1, get RIRB response interrupt for new entry */
-	if (chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND)
-		azx_writew(chip, RINTCNT, 0xc0);
-	else
-		azx_writew(chip, RINTCNT, 1);
-	/* enable rirb dma and response irq */
-	azx_writeb(chip, RIRBCTL, ICH6_RBCTL_DMA_EN | ICH6_RBCTL_IRQ_EN);
-	spin_unlock_irq(&chip->reg_lock);
-}
-
-static void azx_free_cmd_io(struct azx *chip)
-{
-	spin_lock_irq(&chip->reg_lock);
-	/* disable ringbuffer DMAs */
-	azx_writeb(chip, RIRBCTL, 0);
-	azx_writeb(chip, CORBCTL, 0);
-	spin_unlock_irq(&chip->reg_lock);
-}
-
-static unsigned int azx_command_addr(u32 cmd)
-{
-	unsigned int addr = cmd >> 28;
-
-	if (addr >= AZX_MAX_CODECS) {
-		snd_BUG();
-		addr = 0;
-	}
-
-	return addr;
-}
-
-/* send a command */
-static int azx_corb_send_cmd(struct hda_bus *bus, u32 val)
-{
-	struct azx *chip = bus->private_data;
-	unsigned int addr = azx_command_addr(val);
-	unsigned int wp, rp;
-
-	spin_lock_irq(&chip->reg_lock);
-
-	/* add command to corb */
-	wp = azx_readw(chip, CORBWP);
-	if (wp == 0xffff) {
-		/* something wrong, controller likely turned to D3 */
-		spin_unlock_irq(&chip->reg_lock);
-		return -EIO;
-	}
-	wp++;
-	wp %= ICH6_MAX_CORB_ENTRIES;
-
-	rp = azx_readw(chip, CORBRP);
-	if (wp == rp) {
-		/* oops, it's full */
-		spin_unlock_irq(&chip->reg_lock);
-		return -EAGAIN;
-	}
-
-	chip->rirb.cmds[addr]++;
-	chip->corb.buf[wp] = cpu_to_le32(val);
-	azx_writew(chip, CORBWP, wp);
-
-	spin_unlock_irq(&chip->reg_lock);
-
-	return 0;
-}
-
-#define ICH6_RIRB_EX_UNSOL_EV	(1<<4)
-
-/* retrieve RIRB entry - called from interrupt handler */
-static void azx_update_rirb(struct azx *chip)
-{
-	unsigned int rp, wp;
-	unsigned int addr;
-	u32 res, res_ex;
-
-	wp = azx_readw(chip, RIRBWP);
-	if (wp == 0xffff) {
-		/* something wrong, controller likely turned to D3 */
-		return;
-	}
-
-	if (wp == chip->rirb.wp)
-		return;
-	chip->rirb.wp = wp;
-
-	while (chip->rirb.rp != wp) {
-		chip->rirb.rp++;
-		chip->rirb.rp %= ICH6_MAX_RIRB_ENTRIES;
-
-		rp = chip->rirb.rp << 1; /* an RIRB entry is 8-bytes */
-		res_ex = le32_to_cpu(chip->rirb.buf[rp + 1]);
-		res = le32_to_cpu(chip->rirb.buf[rp]);
-		addr = res_ex & 0xf;
-		if ((addr >= AZX_MAX_CODECS) || !(chip->codec_mask & (1 << addr))) {
-			dev_err(chip->card->dev, "spurious response %#x:%#x, rp = %d, wp = %d",
-				res, res_ex,
-				chip->rirb.rp, wp);
-			snd_BUG();
-		}
-		else if (res_ex & ICH6_RIRB_EX_UNSOL_EV)
-			snd_hda_queue_unsol_event(chip->bus, res, res_ex);
-		else if (chip->rirb.cmds[addr]) {
-			chip->rirb.res[addr] = res;
-			smp_wmb();
-			chip->rirb.cmds[addr]--;
-		} else if (printk_ratelimit()) {
-			dev_err(chip->card->dev, "spurious response %#x:%#x, last cmd=%#08x\n",
-				res, res_ex,
-				chip->last_cmd[addr]);
-		}
-	}
-}
-
-/* receive a response */
-static unsigned int azx_rirb_get_response(struct hda_bus *bus,
-					  unsigned int addr)
-{
-	struct azx *chip = bus->private_data;
-	unsigned long timeout;
-	unsigned long loopcounter;
-	int do_poll = 0;
-
- again:
-	timeout = jiffies + msecs_to_jiffies(1000);
-
-	for (loopcounter = 0;; loopcounter++) {
-		if (chip->polling_mode || do_poll) {
-			spin_lock_irq(&chip->reg_lock);
-			azx_update_rirb(chip);
-			spin_unlock_irq(&chip->reg_lock);
-		}
-		if (!chip->rirb.cmds[addr]) {
-			smp_rmb();
-			bus->rirb_error = 0;
-
-			if (!do_poll)
-				chip->poll_count = 0;
-			return chip->rirb.res[addr]; /* the last value */
-		}
-		if (time_after(jiffies, timeout))
-			break;
-		if (bus->needs_damn_long_delay || loopcounter > 3000)
-			msleep(2); /* temporary workaround */
-		else {
-			udelay(10);
-			cond_resched();
-		}
-	}
-
-	if (!bus->no_response_fallback)
-		return -1;
-
-	if (!chip->polling_mode && chip->poll_count < 2) {
-		dev_dbg(chip->card->dev,
-			"azx_get_response timeout, polling the codec once: last cmd=0x%08x\n",
-			chip->last_cmd[addr]);
-		do_poll = 1;
-		chip->poll_count++;
-		goto again;
-	}
-
-
-	if (!chip->polling_mode) {
-		dev_warn(chip->card->dev,
-			 "azx_get_response timeout, switching to polling mode: last cmd=0x%08x\n",
-			 chip->last_cmd[addr]);
-		chip->polling_mode = 1;
-		goto again;
-	}
-
-	if (chip->msi) {
-		dev_warn(chip->card->dev,
-			 "No response from codec, disabling MSI: last cmd=0x%08x\n",
-			 chip->last_cmd[addr]);
-		if (chip->ops->disable_msi_reset_irq &&
-		    chip->ops->disable_msi_reset_irq(chip) < 0) {
-			bus->rirb_error = 1;
-			return -1;
-		}
-		goto again;
-	}
-
-	if (chip->probing) {
-		/* If this critical timeout happens during the codec probing
-		 * phase, this is likely an access to a non-existing codec
-		 * slot.  Better to return an error and reset the system.
-		 */
-		return -1;
-	}
-
-	/* a fatal communication error; need either to reset or to fallback
-	 * to the single_cmd mode
-	 */
-	bus->rirb_error = 1;
-	if (bus->allow_bus_reset && !bus->response_reset && !bus->in_reset) {
-		bus->response_reset = 1;
-		return -1; /* give a chance to retry */
-	}
-
-	dev_err(chip->card->dev,
-		"azx_get_response timeout, switching to single_cmd mode: last cmd=0x%08x\n",
-		chip->last_cmd[addr]);
-	chip->single_cmd = 1;
-	bus->response_reset = 0;
-	/* release CORB/RIRB */
-	azx_free_cmd_io(chip);
-	/* disable unsolicited responses */
-	azx_writel(chip, GCTL, azx_readl(chip, GCTL) & ~ICH6_GCTL_UNSOL);
-	return -1;
-}
-
-/*
- * Use the single immediate command instead of CORB/RIRB for simplicity
- *
- * Note: according to Intel, this is not preferred use.  The command was
- *       intended for the BIOS only, and may get confused with unsolicited
- *       responses.  So, we shouldn't use it for normal operation from the
- *       driver.
- *       I left the codes, however, for debugging/testing purposes.
- */
-
-/* receive a response */
-static int azx_single_wait_for_response(struct azx *chip, unsigned int addr)
-{
-	int timeout = 50;
-
-	while (timeout--) {
-		/* check IRV busy bit */
-		if (azx_readw(chip, IRS) & ICH6_IRS_VALID) {
-			/* reuse rirb.res as the response return value */
-			chip->rirb.res[addr] = azx_readl(chip, IR);
-			return 0;
-		}
-		udelay(1);
-	}
-	if (printk_ratelimit())
-		dev_dbg(chip->card->dev, "get_response timeout: IRS=0x%x\n",
-			azx_readw(chip, IRS));
-	chip->rirb.res[addr] = -1;
-	return -EIO;
-}
-
-/* send a command */
-static int azx_single_send_cmd(struct hda_bus *bus, u32 val)
-{
-	struct azx *chip = bus->private_data;
-	unsigned int addr = azx_command_addr(val);
-	int timeout = 50;
-
-	bus->rirb_error = 0;
-	while (timeout--) {
-		/* check ICB busy bit */
-		if (!((azx_readw(chip, IRS) & ICH6_IRS_BUSY))) {
-			/* Clear IRV valid bit */
-			azx_writew(chip, IRS, azx_readw(chip, IRS) |
-				   ICH6_IRS_VALID);
-			azx_writel(chip, IC, val);
-			azx_writew(chip, IRS, azx_readw(chip, IRS) |
-				   ICH6_IRS_BUSY);
-			return azx_single_wait_for_response(chip, addr);
-		}
-		udelay(1);
-	}
-	if (printk_ratelimit())
-		dev_dbg(chip->card->dev,
-			"send_cmd timeout: IRS=0x%x, val=0x%x\n",
-			azx_readw(chip, IRS), val);
-	return -EIO;
-}
-
-/* receive a response */
-static unsigned int azx_single_get_response(struct hda_bus *bus,
-					    unsigned int addr)
-{
-	struct azx *chip = bus->private_data;
-	return chip->rirb.res[addr];
-}
-
-/*
- * The below are the main callbacks from hda_codec.
- *
- * They are just the skeleton to call sub-callbacks according to the
- * current setting of chip->single_cmd.
- */
-
-/* send a command */
-static int azx_send_cmd(struct hda_bus *bus, unsigned int val)
-{
-	struct azx *chip = bus->private_data;
-
-	if (chip->disabled)
-		return 0;
-	chip->last_cmd[azx_command_addr(val)] = val;
-	if (chip->single_cmd)
-		return azx_single_send_cmd(bus, val);
-	else
-		return azx_corb_send_cmd(bus, val);
-}
-
-/* get a response */
-static unsigned int azx_get_response(struct hda_bus *bus,
-				     unsigned int addr)
-{
-	struct azx *chip = bus->private_data;
-	if (chip->disabled)
-		return 0;
-	if (chip->single_cmd)
-		return azx_single_get_response(bus, addr);
-	else
-		return azx_rirb_get_response(bus, addr);
-}
 
 #ifdef CONFIG_PM
 static void azx_power_notify(struct hda_bus *bus, bool power_up);