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-rw-r--r--drivers/soundwire/intel.c1065
1 files changed, 1065 insertions, 0 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
new file mode 100644
index 000000000..26d848542
--- /dev/null
+++ b/drivers/soundwire/intel.c
@@ -0,0 +1,1065 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+// Copyright(c) 2015-17 Intel Corporation.
+
+/*
+ * Soundwire Intel Master Driver
+ */
+
+#include <linux/acpi.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_intel.h>
+#include "cadence_master.h"
+#include "bus.h"
+#include "intel.h"
+
+static int intel_wait_bit(void __iomem *base, int offset, u32 mask, u32 target)
+{
+ int timeout = 10;
+ u32 reg_read;
+
+ do {
+ reg_read = readl(base + offset);
+ if ((reg_read & mask) == target)
+ return 0;
+
+ timeout--;
+ usleep_range(50, 100);
+ } while (timeout != 0);
+
+ return -EAGAIN;
+}
+
+static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
+{
+ writel(value, base + offset);
+ return intel_wait_bit(base, offset, mask, 0);
+}
+
+static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
+{
+ writel(value, base + offset);
+ return intel_wait_bit(base, offset, mask, mask);
+}
+
+/*
+ * debugfs
+ */
+#ifdef CONFIG_DEBUG_FS
+
+#define RD_BUF (2 * PAGE_SIZE)
+
+static ssize_t intel_sprintf(void __iomem *mem, bool l,
+ char *buf, size_t pos, unsigned int reg)
+{
+ int value;
+
+ if (l)
+ value = intel_readl(mem, reg);
+ else
+ value = intel_readw(mem, reg);
+
+ return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value);
+}
+
+static int intel_reg_show(struct seq_file *s_file, void *data)
+{
+ struct sdw_intel *sdw = s_file->private;
+ void __iomem *s = sdw->link_res->shim;
+ void __iomem *a = sdw->link_res->alh;
+ char *buf;
+ ssize_t ret;
+ int i, j;
+ unsigned int links, reg;
+
+ buf = kzalloc(RD_BUF, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ links = intel_readl(s, SDW_SHIM_LCAP) & SDW_SHIM_LCAP_LCOUNT_MASK;
+
+ ret = scnprintf(buf, RD_BUF, "Register Value\n");
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
+
+ for (i = 0; i < links; i++) {
+ reg = SDW_SHIM_LCAP + i * 4;
+ ret += intel_sprintf(s, true, buf, ret, reg);
+ }
+
+ for (i = 0; i < links; i++) {
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i);
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i));
+
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n");
+
+ /*
+ * the value 10 is the number of PDIs. We will need a
+ * cleanup to remove hard-coded Intel configurations
+ * from cadence_master.c
+ */
+ for (j = 0; j < 10; j++) {
+ ret += intel_sprintf(s, false, buf, ret,
+ SDW_SHIM_PCMSYCHM(i, j));
+ ret += intel_sprintf(s, false, buf, ret,
+ SDW_SHIM_PCMSYCHC(i, j));
+ }
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\n IOCTL, CTMCTL\n");
+
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
+ }
+
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n");
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN);
+ ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS);
+
+ ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n");
+ for (i = 0; i < SDW_ALH_NUM_STREAMS; i++)
+ ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));
+
+ seq_printf(s_file, "%s", buf);
+ kfree(buf);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(intel_reg);
+
+static int intel_set_m_datamode(void *data, u64 value)
+{
+ struct sdw_intel *sdw = data;
+ struct sdw_bus *bus = &sdw->cdns.bus;
+
+ if (value > SDW_PORT_DATA_MODE_STATIC_1)
+ return -EINVAL;
+
+ /* Userspace changed the hardware state behind the kernel's back */
+ add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+ bus->params.m_data_mode = value;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL,
+ intel_set_m_datamode, "%llu\n");
+
+static int intel_set_s_datamode(void *data, u64 value)
+{
+ struct sdw_intel *sdw = data;
+ struct sdw_bus *bus = &sdw->cdns.bus;
+
+ if (value > SDW_PORT_DATA_MODE_STATIC_1)
+ return -EINVAL;
+
+ /* Userspace changed the hardware state behind the kernel's back */
+ add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+ bus->params.s_data_mode = value;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL,
+ intel_set_s_datamode, "%llu\n");
+
+static void intel_debugfs_init(struct sdw_intel *sdw)
+{
+ struct dentry *root = sdw->cdns.bus.debugfs;
+
+ if (!root)
+ return;
+
+ sdw->debugfs = debugfs_create_dir("intel-sdw", root);
+
+ debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw,
+ &intel_reg_fops);
+
+ debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw,
+ &intel_set_m_datamode_fops);
+
+ debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw,
+ &intel_set_s_datamode_fops);
+
+ sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs);
+}
+
+static void intel_debugfs_exit(struct sdw_intel *sdw)
+{
+ debugfs_remove_recursive(sdw->debugfs);
+}
+#else
+static void intel_debugfs_init(struct sdw_intel *sdw) {}
+static void intel_debugfs_exit(struct sdw_intel *sdw) {}
+#endif /* CONFIG_DEBUG_FS */
+
+/*
+ * shim ops
+ */
+/* this needs to be called with shim_lock */
+static void intel_shim_glue_to_master_ip(struct sdw_intel *sdw)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ u16 ioctl;
+
+ /* Switch to MIP from Glue logic */
+ ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
+
+ ioctl &= ~(SDW_SHIM_IOCTL_DOE);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl &= ~(SDW_SHIM_IOCTL_DO);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl |= (SDW_SHIM_IOCTL_MIF);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl &= ~(SDW_SHIM_IOCTL_BKE);
+ ioctl &= ~(SDW_SHIM_IOCTL_COE);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ /* at this point Master IP has full control of the I/Os */
+}
+
+/* this needs to be called with shim_lock */
+static void intel_shim_master_ip_to_glue(struct sdw_intel *sdw)
+{
+ unsigned int link_id = sdw->instance;
+ void __iomem *shim = sdw->link_res->shim;
+ u16 ioctl;
+
+ /* Glue logic */
+ ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
+ ioctl |= SDW_SHIM_IOCTL_BKE;
+ ioctl |= SDW_SHIM_IOCTL_COE;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl &= ~(SDW_SHIM_IOCTL_MIF);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ /* at this point Integration Glue has full control of the I/Os */
+}
+
+/* this needs to be called with shim_lock */
+static void intel_shim_init(struct sdw_intel *sdw)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ u16 ioctl = 0, act;
+
+ /* Initialize Shim */
+ ioctl |= SDW_SHIM_IOCTL_BKE;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl |= SDW_SHIM_IOCTL_WPDD;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl |= SDW_SHIM_IOCTL_DO;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ ioctl |= SDW_SHIM_IOCTL_DOE;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+ usleep_range(10, 15);
+
+ intel_shim_glue_to_master_ip(sdw);
+
+ act = intel_readw(shim, SDW_SHIM_CTMCTL(link_id));
+ u16p_replace_bits(&act, 0x1, SDW_SHIM_CTMCTL_DOAIS);
+ act |= SDW_SHIM_CTMCTL_DACTQE;
+ act |= SDW_SHIM_CTMCTL_DODS;
+ intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
+ usleep_range(10, 15);
+}
+
+static int intel_shim_check_wake(struct sdw_intel *sdw)
+{
+ void __iomem *shim;
+ u16 wake_sts;
+
+ shim = sdw->link_res->shim;
+ wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+
+ return wake_sts & BIT(sdw->instance);
+}
+
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ u16 wake_en, wake_sts;
+
+ mutex_lock(sdw->link_res->shim_lock);
+ wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
+
+ if (wake_enable) {
+ /* Enable the wakeup */
+ wake_en |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
+ intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
+ } else {
+ /* Disable the wake up interrupt */
+ wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
+ intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
+
+ /* Clear wake status */
+ wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+ wake_sts |= (SDW_SHIM_WAKESTS_STATUS << link_id);
+ intel_writew(shim, SDW_SHIM_WAKESTS, wake_sts);
+ }
+ mutex_unlock(sdw->link_res->shim_lock);
+}
+
+static bool intel_check_cmdsync_unlocked(struct sdw_intel *sdw)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ int sync_reg;
+
+ sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
+ return !!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK);
+}
+
+static int intel_link_power_up(struct sdw_intel *sdw)
+{
+ unsigned int link_id = sdw->instance;
+ void __iomem *shim = sdw->link_res->shim;
+ u32 *shim_mask = sdw->link_res->shim_mask;
+ struct sdw_bus *bus = &sdw->cdns.bus;
+ struct sdw_master_prop *prop = &bus->prop;
+ u32 spa_mask, cpa_mask;
+ u32 link_control;
+ int ret = 0;
+ u32 syncprd;
+ u32 sync_reg;
+
+ mutex_lock(sdw->link_res->shim_lock);
+
+ /*
+ * The hardware relies on an internal counter, typically 4kHz,
+ * to generate the SoundWire SSP - which defines a 'safe'
+ * synchronization point between commands and audio transport
+ * and allows for multi link synchronization. The SYNCPRD value
+ * is only dependent on the oscillator clock provided to
+ * the IP, so adjust based on _DSD properties reported in DSDT
+ * tables. The values reported are based on either 24MHz
+ * (CNL/CML) or 38.4 MHz (ICL/TGL+).
+ */
+ if (prop->mclk_freq % 6000000)
+ syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
+ else
+ syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
+
+ if (!*shim_mask) {
+ dev_dbg(sdw->cdns.dev, "powering up all links\n");
+
+ /* we first need to program the SyncPRD/CPU registers */
+ dev_dbg(sdw->cdns.dev,
+ "first link up, programming SYNCPRD\n");
+
+ /* set SyncPRD period */
+ sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
+ u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD);
+
+ /* Set SyncCPU bit */
+ sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
+ intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
+
+ /* Link power up sequence */
+ link_control = intel_readl(shim, SDW_SHIM_LCTL);
+
+ /* only power-up enabled links */
+ spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask);
+ cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
+
+ link_control |= spa_mask;
+
+ ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+ if (ret < 0) {
+ dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret);
+ goto out;
+ }
+
+ /* SyncCPU will change once link is active */
+ ret = intel_wait_bit(shim, SDW_SHIM_SYNC,
+ SDW_SHIM_SYNC_SYNCCPU, 0);
+ if (ret < 0) {
+ dev_err(sdw->cdns.dev,
+ "Failed to set SHIM_SYNC: %d\n", ret);
+ goto out;
+ }
+ }
+
+ *shim_mask |= BIT(link_id);
+
+ sdw->cdns.link_up = true;
+
+ intel_shim_init(sdw);
+
+out:
+ mutex_unlock(sdw->link_res->shim_lock);
+
+ return ret;
+}
+
+static int intel_link_power_down(struct sdw_intel *sdw)
+{
+ u32 link_control, spa_mask, cpa_mask;
+ unsigned int link_id = sdw->instance;
+ void __iomem *shim = sdw->link_res->shim;
+ u32 *shim_mask = sdw->link_res->shim_mask;
+ int ret = 0;
+
+ mutex_lock(sdw->link_res->shim_lock);
+
+ if (!(*shim_mask & BIT(link_id)))
+ dev_err(sdw->cdns.dev,
+ "%s: Unbalanced power-up/down calls\n", __func__);
+
+ sdw->cdns.link_up = false;
+
+ intel_shim_master_ip_to_glue(sdw);
+
+ *shim_mask &= ~BIT(link_id);
+
+ if (!*shim_mask) {
+
+ dev_dbg(sdw->cdns.dev, "powering down all links\n");
+
+ /* Link power down sequence */
+ link_control = intel_readl(shim, SDW_SHIM_LCTL);
+
+ /* only power-down enabled links */
+ spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, ~sdw->link_res->link_mask);
+ cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
+
+ link_control &= spa_mask;
+
+ ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+ if (ret < 0) {
+ dev_err(sdw->cdns.dev, "%s: could not power down link\n", __func__);
+
+ /*
+ * we leave the sdw->cdns.link_up flag as false since we've disabled
+ * the link at this point and cannot handle interrupts any longer.
+ */
+ }
+ }
+
+ mutex_unlock(sdw->link_res->shim_lock);
+
+ return ret;
+}
+
+static void intel_shim_sync_arm(struct sdw_intel *sdw)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ u32 sync_reg;
+
+ mutex_lock(sdw->link_res->shim_lock);
+
+ /* update SYNC register */
+ sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
+ sync_reg |= (SDW_SHIM_SYNC_CMDSYNC << sdw->instance);
+ intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
+
+ mutex_unlock(sdw->link_res->shim_lock);
+}
+
+static int intel_shim_sync_go_unlocked(struct sdw_intel *sdw)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ u32 sync_reg;
+
+ /* Read SYNC register */
+ sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
+
+ /*
+ * Set SyncGO bit to synchronously trigger a bank switch for
+ * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all
+ * the Masters.
+ */
+ sync_reg |= SDW_SHIM_SYNC_SYNCGO;
+
+ intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
+
+ return 0;
+}
+
+static int intel_shim_sync_go(struct sdw_intel *sdw)
+{
+ int ret;
+
+ mutex_lock(sdw->link_res->shim_lock);
+
+ ret = intel_shim_sync_go_unlocked(sdw);
+
+ mutex_unlock(sdw->link_res->shim_lock);
+
+ return ret;
+}
+
+/*
+ * PDI routines
+ */
+static void intel_pdi_init(struct sdw_intel *sdw,
+ struct sdw_cdns_stream_config *config)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ int pcm_cap;
+
+ /* PCM Stream Capability */
+ pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
+
+ config->pcm_bd = FIELD_GET(SDW_SHIM_PCMSCAP_BSS, pcm_cap);
+ config->pcm_in = FIELD_GET(SDW_SHIM_PCMSCAP_ISS, pcm_cap);
+ config->pcm_out = FIELD_GET(SDW_SHIM_PCMSCAP_OSS, pcm_cap);
+
+ dev_dbg(sdw->cdns.dev, "PCM cap bd:%d in:%d out:%d\n",
+ config->pcm_bd, config->pcm_in, config->pcm_out);
+}
+
+static int
+intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ int count;
+
+ count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
+
+ /*
+ * WORKAROUND: on all existing Intel controllers, pdi
+ * number 2 reports channel count as 1 even though it
+ * supports 8 channels. Performing hardcoding for pdi
+ * number 2.
+ */
+ if (pdi_num == 2)
+ count = 7;
+
+ /* zero based values for channel count in register */
+ count++;
+
+ return count;
+}
+
+static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
+ struct sdw_cdns_pdi *pdi,
+ unsigned int num_pdi,
+ unsigned int *num_ch)
+{
+ int i, ch_count = 0;
+
+ for (i = 0; i < num_pdi; i++) {
+ pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num);
+ ch_count += pdi->ch_count;
+ pdi++;
+ }
+
+ *num_ch = ch_count;
+ return 0;
+}
+
+static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
+ struct sdw_cdns_streams *stream)
+{
+ intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
+ &stream->num_ch_bd);
+
+ intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
+ &stream->num_ch_in);
+
+ intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
+ &stream->num_ch_out);
+
+ return 0;
+}
+
+static void
+intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
+{
+ void __iomem *shim = sdw->link_res->shim;
+ unsigned int link_id = sdw->instance;
+ int pdi_conf = 0;
+
+ /* the Bulk and PCM streams are not contiguous */
+ pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
+ if (pdi->num >= 2)
+ pdi->intel_alh_id += 2;
+
+ /*
+ * Program stream parameters to stream SHIM register
+ * This is applicable for PCM stream only.
+ */
+ if (pdi->type != SDW_STREAM_PCM)
+ return;
+
+ if (pdi->dir == SDW_DATA_DIR_RX)
+ pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
+ else
+ pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
+
+ u32p_replace_bits(&pdi_conf, pdi->intel_alh_id, SDW_SHIM_PCMSYCM_STREAM);
+ u32p_replace_bits(&pdi_conf, pdi->l_ch_num, SDW_SHIM_PCMSYCM_LCHN);
+ u32p_replace_bits(&pdi_conf, pdi->h_ch_num, SDW_SHIM_PCMSYCM_HCHN);
+
+ intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
+}
+
+static void
+intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
+{
+ void __iomem *alh = sdw->link_res->alh;
+ unsigned int link_id = sdw->instance;
+ unsigned int conf;
+
+ /* the Bulk and PCM streams are not contiguous */
+ pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
+ if (pdi->num >= 2)
+ pdi->intel_alh_id += 2;
+
+ /* Program Stream config ALH register */
+ conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
+
+ u32p_replace_bits(&conf, SDW_ALH_STRMZCFG_DMAT_VAL, SDW_ALH_STRMZCFG_DMAT);
+ u32p_replace_bits(&conf, pdi->ch_count - 1, SDW_ALH_STRMZCFG_CHN);
+
+ intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
+}
+
+static int intel_params_stream(struct sdw_intel *sdw,
+ struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai,
+ struct snd_pcm_hw_params *hw_params,
+ int link_id, int alh_stream_id)
+{
+ struct sdw_intel_link_res *res = sdw->link_res;
+ struct sdw_intel_stream_params_data params_data;
+
+ params_data.substream = substream;
+ params_data.dai = dai;
+ params_data.hw_params = hw_params;
+ params_data.link_id = link_id;
+ params_data.alh_stream_id = alh_stream_id;
+
+ if (res->ops && res->ops->params_stream && res->dev)
+ return res->ops->params_stream(res->dev,
+ &params_data);
+ return -EIO;
+}
+
+/*
+ * DAI routines
+ */
+
+static int intel_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_intel *sdw = cdns_to_intel(cdns);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+ struct sdw_cdns_pdi *pdi;
+ struct sdw_stream_config sconfig;
+ struct sdw_port_config *pconfig;
+ int ch, dir;
+ int ret;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+ if (!dai_runtime)
+ return -EIO;
+
+ ch = params_channels(params);
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ dir = SDW_DATA_DIR_RX;
+ else
+ dir = SDW_DATA_DIR_TX;
+
+ pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id);
+
+ if (!pdi) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* do run-time configurations for SHIM, ALH and PDI/PORT */
+ intel_pdi_shim_configure(sdw, pdi);
+ intel_pdi_alh_configure(sdw, pdi);
+ sdw_cdns_config_stream(cdns, ch, dir, pdi);
+
+ /* store pdi and hw_params, may be needed in prepare step */
+ dai_runtime->paused = false;
+ dai_runtime->suspended = false;
+ dai_runtime->pdi = pdi;
+
+ /* Inform DSP about PDI stream number */
+ ret = intel_params_stream(sdw, substream, dai, params,
+ sdw->instance,
+ pdi->intel_alh_id);
+ if (ret)
+ goto error;
+
+ sconfig.direction = dir;
+ sconfig.ch_count = ch;
+ sconfig.frame_rate = params_rate(params);
+ sconfig.type = dai_runtime->stream_type;
+
+ sconfig.bps = snd_pcm_format_width(params_format(params));
+
+ /* Port configuration */
+ pconfig = kzalloc(sizeof(*pconfig), GFP_KERNEL);
+ if (!pconfig) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ pconfig->num = pdi->num;
+ pconfig->ch_mask = (1 << ch) - 1;
+
+ ret = sdw_stream_add_master(&cdns->bus, &sconfig,
+ pconfig, 1, dai_runtime->stream);
+ if (ret)
+ dev_err(cdns->dev, "add master to stream failed:%d\n", ret);
+
+ kfree(pconfig);
+error:
+ return ret;
+}
+
+static int intel_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_intel *sdw = cdns_to_intel(cdns);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+ int ch, dir;
+ int ret = 0;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+ if (!dai_runtime) {
+ dev_err(dai->dev, "failed to get dai runtime in %s\n",
+ __func__);
+ return -EIO;
+ }
+
+ if (dai_runtime->suspended) {
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_pcm_hw_params *hw_params;
+
+ hw_params = &rtd->dpcm[substream->stream].hw_params;
+
+ dai_runtime->suspended = false;
+
+ /*
+ * .prepare() is called after system resume, where we
+ * need to reinitialize the SHIM/ALH/Cadence IP.
+ * .prepare() is also called to deal with underflows,
+ * but in those cases we cannot touch ALH/SHIM
+ * registers
+ */
+
+ /* configure stream */
+ ch = params_channels(hw_params);
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ dir = SDW_DATA_DIR_RX;
+ else
+ dir = SDW_DATA_DIR_TX;
+
+ intel_pdi_shim_configure(sdw, dai_runtime->pdi);
+ intel_pdi_alh_configure(sdw, dai_runtime->pdi);
+ sdw_cdns_config_stream(cdns, ch, dir, dai_runtime->pdi);
+
+ /* Inform DSP about PDI stream number */
+ ret = intel_params_stream(sdw, substream, dai,
+ hw_params,
+ sdw->instance,
+ dai_runtime->pdi->intel_alh_id);
+ }
+
+ return ret;
+}
+
+static int
+intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+ int ret;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+ if (!dai_runtime)
+ return -EIO;
+
+ /*
+ * The sdw stream state will transition to RELEASED when stream->
+ * master_list is empty. So the stream state will transition to
+ * DEPREPARED for the first cpu-dai and to RELEASED for the last
+ * cpu-dai.
+ */
+ ret = sdw_stream_remove_master(&cdns->bus, dai_runtime->stream);
+ if (ret < 0) {
+ dev_err(dai->dev, "remove master from stream %s failed: %d\n",
+ dai_runtime->stream->name, ret);
+ return ret;
+ }
+
+ dai_runtime->pdi = NULL;
+
+ return 0;
+}
+
+static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
+ void *stream, int direction)
+{
+ return cdns_set_sdw_stream(dai, stream, direction);
+}
+
+static void *intel_get_sdw_stream(struct snd_soc_dai *dai,
+ int direction)
+{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+ if (!dai_runtime)
+ return ERR_PTR(-EINVAL);
+
+ return dai_runtime->stream;
+}
+
+static int intel_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
+{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+ int ret = 0;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+ if (!dai_runtime) {
+ dev_err(dai->dev, "failed to get dai runtime in %s\n",
+ __func__);
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+
+ /*
+ * The .prepare callback is used to deal with xruns and resume operations.
+ * In the case of xruns, the DMAs and SHIM registers cannot be touched,
+ * but for resume operations the DMAs and SHIM registers need to be initialized.
+ * the .trigger callback is used to track the suspend case only.
+ */
+
+ dai_runtime->suspended = true;
+
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ dai_runtime->paused = true;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ dai_runtime->paused = false;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static int intel_component_probe(struct snd_soc_component *component)
+{
+ int ret;
+
+ /*
+ * make sure the device is pm_runtime_active before initiating
+ * bus transactions during the card registration.
+ * We use pm_runtime_resume() here, without taking a reference
+ * and releasing it immediately.
+ */
+ ret = pm_runtime_resume(component->dev);
+ if (ret < 0 && ret != -EACCES)
+ return ret;
+
+ return 0;
+}
+
+static int intel_component_dais_suspend(struct snd_soc_component *component)
+{
+ struct snd_soc_dai *dai;
+
+ /*
+ * In the corner case where a SUSPEND happens during a PAUSE, the ALSA core
+ * does not throw the TRIGGER_SUSPEND. This leaves the DAIs in an unbalanced state.
+ * Since the component suspend is called last, we can trap this corner case
+ * and force the DAIs to release their resources.
+ */
+ for_each_component_dais(component, dai) {
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ struct sdw_cdns_dai_runtime *dai_runtime;
+
+ dai_runtime = cdns->dai_runtime_array[dai->id];
+
+ if (!dai_runtime)
+ continue;
+
+ if (dai_runtime->suspended)
+ continue;
+
+ if (dai_runtime->paused)
+ dai_runtime->suspended = true;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
+ .hw_params = intel_hw_params,
+ .prepare = intel_prepare,
+ .hw_free = intel_hw_free,
+ .trigger = intel_trigger,
+ .set_stream = intel_pcm_set_sdw_stream,
+ .get_stream = intel_get_sdw_stream,
+};
+
+static const struct snd_soc_component_driver dai_component = {
+ .name = "soundwire",
+ .probe = intel_component_probe,
+ .suspend = intel_component_dais_suspend,
+ .legacy_dai_naming = 1,
+};
+
+static int intel_create_dai(struct sdw_cdns *cdns,
+ struct snd_soc_dai_driver *dais,
+ enum intel_pdi_type type,
+ u32 num, u32 off, u32 max_ch)
+{
+ int i;
+
+ if (num == 0)
+ return 0;
+
+ for (i = off; i < (off + num); i++) {
+ dais[i].name = devm_kasprintf(cdns->dev, GFP_KERNEL,
+ "SDW%d Pin%d",
+ cdns->instance, i);
+ if (!dais[i].name)
+ return -ENOMEM;
+
+ if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
+ dais[i].playback.channels_min = 1;
+ dais[i].playback.channels_max = max_ch;
+ }
+
+ if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
+ dais[i].capture.channels_min = 1;
+ dais[i].capture.channels_max = max_ch;
+ }
+
+ dais[i].ops = &intel_pcm_dai_ops;
+ }
+
+ return 0;
+}
+
+static int intel_register_dai(struct sdw_intel *sdw)
+{
+ struct sdw_cdns_dai_runtime **dai_runtime_array;
+ struct sdw_cdns_stream_config config;
+ struct sdw_cdns *cdns = &sdw->cdns;
+ struct sdw_cdns_streams *stream;
+ struct snd_soc_dai_driver *dais;
+ int num_dai, ret, off = 0;
+
+ /* Read the PDI config and initialize cadence PDI */
+ intel_pdi_init(sdw, &config);
+ ret = sdw_cdns_pdi_init(cdns, config);
+ if (ret)
+ return ret;
+
+ intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm);
+
+ /* DAIs are created based on total number of PDIs supported */
+ num_dai = cdns->pcm.num_pdi;
+
+ dai_runtime_array = devm_kcalloc(cdns->dev, num_dai,
+ sizeof(struct sdw_cdns_dai_runtime *),
+ GFP_KERNEL);
+ if (!dai_runtime_array)
+ return -ENOMEM;
+ cdns->dai_runtime_array = dai_runtime_array;
+
+ dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
+ if (!dais)
+ return -ENOMEM;
+
+ /* Create PCM DAIs */
+ stream = &cdns->pcm;
+
+ ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pcm.num_in,
+ off, stream->num_ch_in);
+ if (ret)
+ return ret;
+
+ off += cdns->pcm.num_in;
+ ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pcm.num_out,
+ off, stream->num_ch_out);
+ if (ret)
+ return ret;
+
+ off += cdns->pcm.num_out;
+ ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pcm.num_bd,
+ off, stream->num_ch_bd);
+ if (ret)
+ return ret;
+
+ return devm_snd_soc_register_component(cdns->dev, &dai_component,
+ dais, num_dai);
+}
+
+
+const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
+ .debugfs_init = intel_debugfs_init,
+ .debugfs_exit = intel_debugfs_exit,
+
+ .register_dai = intel_register_dai,
+
+ .check_clock_stop = intel_check_clock_stop,
+ .start_bus = intel_start_bus,
+ .start_bus_after_reset = intel_start_bus_after_reset,
+ .start_bus_after_clock_stop = intel_start_bus_after_clock_stop,
+ .stop_bus = intel_stop_bus,
+
+ .link_power_up = intel_link_power_up,
+ .link_power_down = intel_link_power_down,
+
+ .shim_check_wake = intel_shim_check_wake,
+ .shim_wake = intel_shim_wake,
+
+ .pre_bank_switch = intel_pre_bank_switch,
+ .post_bank_switch = intel_post_bank_switch,
+
+ .sync_arm = intel_shim_sync_arm,
+ .sync_go_unlocked = intel_shim_sync_go_unlocked,
+ .sync_go = intel_shim_sync_go,
+ .sync_check_cmdsync_unlocked = intel_check_cmdsync_unlocked,
+};
+EXPORT_SYMBOL_NS(sdw_intel_cnl_hw_ops, SOUNDWIRE_INTEL);
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 14:37:23 +0000