slimbus: Add snapshot of slimbus driver.
This snapshot is taken as of msm-4.4 'commit <3c7400dc73db>
("Merge "diag: dci: Fix possible out of bound access"")'.
CRs-Fixed: 2002163
Change-Id: I7e91941a324206b964a55558a1a9ab2fed7fb3e9
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
diff --git a/drivers/slimbus/slim-msm-ctrl.c b/drivers/slimbus/slim-msm-ctrl.c
new file mode 100644
index 0000000..3f99b2b
--- /dev/null
+++ b/drivers/slimbus/slim-msm-ctrl.c
@@ -0,0 +1,1641 @@
+/* Copyright (c) 2011-2015, 2017 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/slimbus/slimbus.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_slimbus.h>
+#include <linux/msm-sps.h>
+#include <linux/qdsp6v2/apr.h>
+#include "slim-msm.h"
+
+#define MSM_SLIM_NAME "msm_slim_ctrl"
+#define SLIM_ROOT_FREQ 24576000
+
+#define QC_MSM_DEVS 5
+
+/* Manager registers */
+enum mgr_reg {
+ MGR_CFG = 0x200,
+ MGR_STATUS = 0x204,
+ MGR_RX_MSGQ_CFG = 0x208,
+ MGR_INT_EN = 0x210,
+ MGR_INT_STAT = 0x214,
+ MGR_INT_CLR = 0x218,
+ MGR_TX_MSG = 0x230,
+ MGR_RX_MSG = 0x270,
+ MGR_IE_STAT = 0x2F0,
+ MGR_VE_STAT = 0x300,
+};
+
+enum msg_cfg {
+ MGR_CFG_ENABLE = 1,
+ MGR_CFG_RX_MSGQ_EN = 1 << 1,
+ MGR_CFG_TX_MSGQ_EN_HIGH = 1 << 2,
+ MGR_CFG_TX_MSGQ_EN_LOW = 1 << 3,
+};
+/* Message queue types */
+enum msm_slim_msgq_type {
+ MSGQ_RX = 0,
+ MSGQ_TX_LOW = 1,
+ MSGQ_TX_HIGH = 2,
+};
+/* Framer registers */
+enum frm_reg {
+ FRM_CFG = 0x400,
+ FRM_STAT = 0x404,
+ FRM_INT_EN = 0x410,
+ FRM_INT_STAT = 0x414,
+ FRM_INT_CLR = 0x418,
+ FRM_WAKEUP = 0x41C,
+ FRM_CLKCTL_DONE = 0x420,
+ FRM_IE_STAT = 0x430,
+ FRM_VE_STAT = 0x440,
+};
+
+/* Interface registers */
+enum intf_reg {
+ INTF_CFG = 0x600,
+ INTF_STAT = 0x604,
+ INTF_INT_EN = 0x610,
+ INTF_INT_STAT = 0x614,
+ INTF_INT_CLR = 0x618,
+ INTF_IE_STAT = 0x630,
+ INTF_VE_STAT = 0x640,
+};
+
+enum mgr_intr {
+ MGR_INT_RECFG_DONE = 1 << 24,
+ MGR_INT_TX_NACKED_2 = 1 << 25,
+ MGR_INT_MSG_BUF_CONTE = 1 << 26,
+ MGR_INT_RX_MSG_RCVD = 1 << 30,
+ MGR_INT_TX_MSG_SENT = 1 << 31,
+};
+
+enum frm_cfg {
+ FRM_ACTIVE = 1,
+ CLK_GEAR = 7,
+ ROOT_FREQ = 11,
+ REF_CLK_GEAR = 15,
+ INTR_WAKE = 19,
+};
+
+static struct msm_slim_sat *msm_slim_alloc_sat(struct msm_slim_ctrl *dev);
+
+static int msm_sat_enqueue(struct msm_slim_sat *sat, u32 *buf, u8 len)
+{
+ struct msm_slim_ctrl *dev = sat->dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sat->lock, flags);
+ if ((sat->stail + 1) % SAT_CONCUR_MSG == sat->shead) {
+ spin_unlock_irqrestore(&sat->lock, flags);
+ dev_err(dev->dev, "SAT QUEUE full!");
+ return -EXFULL;
+ }
+ memcpy(sat->sat_msgs[sat->stail], (u8 *)buf, len);
+ sat->stail = (sat->stail + 1) % SAT_CONCUR_MSG;
+ spin_unlock_irqrestore(&sat->lock, flags);
+ return 0;
+}
+
+static int msm_sat_dequeue(struct msm_slim_sat *sat, u8 *buf)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sat->lock, flags);
+ if (sat->stail == sat->shead) {
+ spin_unlock_irqrestore(&sat->lock, flags);
+ return -ENODATA;
+ }
+ memcpy(buf, sat->sat_msgs[sat->shead], 40);
+ sat->shead = (sat->shead + 1) % SAT_CONCUR_MSG;
+ spin_unlock_irqrestore(&sat->lock, flags);
+ return 0;
+}
+
+static void msm_get_eaddr(u8 *e_addr, u32 *buffer)
+{
+ e_addr[0] = (buffer[1] >> 24) & 0xff;
+ e_addr[1] = (buffer[1] >> 16) & 0xff;
+ e_addr[2] = (buffer[1] >> 8) & 0xff;
+ e_addr[3] = buffer[1] & 0xff;
+ e_addr[4] = (buffer[0] >> 24) & 0xff;
+ e_addr[5] = (buffer[0] >> 16) & 0xff;
+}
+
+static bool msm_is_sat_dev(u8 *e_addr)
+{
+ if (e_addr[5] == QC_MFGID_LSB && e_addr[4] == QC_MFGID_MSB &&
+ e_addr[2] != QC_CHIPID_SL &&
+ (e_addr[1] == QC_DEVID_SAT1 || e_addr[1] == QC_DEVID_SAT2))
+ return true;
+ return false;
+}
+
+static struct msm_slim_sat *addr_to_sat(struct msm_slim_ctrl *dev, u8 laddr)
+{
+ struct msm_slim_sat *sat = NULL;
+ int i = 0;
+
+ while (!sat && i < dev->nsats) {
+ if (laddr == dev->satd[i]->satcl.laddr)
+ sat = dev->satd[i];
+ i++;
+ }
+ return sat;
+}
+
+static irqreturn_t msm_slim_interrupt(int irq, void *d)
+{
+ struct msm_slim_ctrl *dev = d;
+ u32 pstat;
+ u32 stat = readl_relaxed(dev->base + MGR_INT_STAT);
+
+ if (stat & MGR_INT_TX_MSG_SENT || stat & MGR_INT_TX_NACKED_2) {
+ if (stat & MGR_INT_TX_MSG_SENT)
+ writel_relaxed(MGR_INT_TX_MSG_SENT,
+ dev->base + MGR_INT_CLR);
+ else {
+ u32 mgr_stat = readl_relaxed(dev->base + MGR_STATUS);
+ u32 mgr_ie_stat = readl_relaxed(dev->base +
+ MGR_IE_STAT);
+ u32 frm_stat = readl_relaxed(dev->base + FRM_STAT);
+ u32 frm_cfg = readl_relaxed(dev->base + FRM_CFG);
+ u32 frm_intr_stat = readl_relaxed(dev->base +
+ FRM_INT_STAT);
+ u32 frm_ie_stat = readl_relaxed(dev->base +
+ FRM_IE_STAT);
+ u32 intf_stat = readl_relaxed(dev->base + INTF_STAT);
+ u32 intf_intr_stat = readl_relaxed(dev->base +
+ INTF_INT_STAT);
+ u32 intf_ie_stat = readl_relaxed(dev->base +
+ INTF_IE_STAT);
+
+ writel_relaxed(MGR_INT_TX_NACKED_2,
+ dev->base + MGR_INT_CLR);
+ pr_err("TX Nack MGR dump:int_stat:0x%x, mgr_stat:0x%x",
+ stat, mgr_stat);
+ pr_err("TX Nack MGR dump:ie_stat:0x%x", mgr_ie_stat);
+ pr_err("TX Nack FRM dump:int_stat:0x%x, frm_stat:0x%x",
+ frm_intr_stat, frm_stat);
+ pr_err("TX Nack FRM dump:frm_cfg:0x%x, ie_stat:0x%x",
+ frm_cfg, frm_ie_stat);
+ pr_err("TX Nack INTF dump:intr_st:0x%x, intf_stat:0x%x",
+ intf_intr_stat, intf_stat);
+ pr_err("TX Nack INTF dump:ie_stat:0x%x", intf_ie_stat);
+
+ dev->err = -EIO;
+ }
+ /*
+ * Guarantee that interrupt clear bit write goes through before
+ * signalling completion/exiting ISR
+ */
+ mb();
+ msm_slim_manage_tx_msgq(dev, false, NULL);
+ }
+ if (stat & MGR_INT_RX_MSG_RCVD) {
+ u32 rx_buf[10];
+ u32 mc, mt;
+ u8 len, i;
+
+ rx_buf[0] = readl_relaxed(dev->base + MGR_RX_MSG);
+ len = rx_buf[0] & 0x1F;
+ for (i = 1; i < ((len + 3) >> 2); i++) {
+ rx_buf[i] = readl_relaxed(dev->base + MGR_RX_MSG +
+ (4 * i));
+ dev_dbg(dev->dev, "reading data: %x\n", rx_buf[i]);
+ }
+ mt = (rx_buf[0] >> 5) & 0x7;
+ mc = (rx_buf[0] >> 8) & 0xff;
+ dev_dbg(dev->dev, "MC: %x, MT: %x\n", mc, mt);
+ if (mt == SLIM_MSG_MT_DEST_REFERRED_USER ||
+ mt == SLIM_MSG_MT_SRC_REFERRED_USER) {
+ u8 laddr = (u8)((rx_buf[0] >> 16) & 0xFF);
+ struct msm_slim_sat *sat = addr_to_sat(dev, laddr);
+
+ if (sat)
+ msm_sat_enqueue(sat, rx_buf, len);
+ else
+ dev_err(dev->dev, "unknown sat:%d message",
+ laddr);
+ writel_relaxed(MGR_INT_RX_MSG_RCVD,
+ dev->base + MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through before
+ * queuing work
+ */
+ mb();
+ if (sat)
+ queue_work(sat->wq, &sat->wd);
+ } else if (mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_REPORT_PRESENT) {
+ u8 e_addr[6];
+
+ msm_get_eaddr(e_addr, rx_buf);
+ msm_slim_rx_enqueue(dev, rx_buf, len);
+ writel_relaxed(MGR_INT_RX_MSG_RCVD, dev->base +
+ MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before signalling completion
+ */
+ mb();
+ complete(&dev->rx_msgq_notify);
+ } else if (mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_REPORT_ABSENT) {
+ writel_relaxed(MGR_INT_RX_MSG_RCVD, dev->base +
+ MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before signalling completion
+ */
+ mb();
+ complete(&dev->rx_msgq_notify);
+
+ } else if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
+ mc == SLIM_MSG_MC_REPLY_VALUE) {
+ msm_slim_rx_enqueue(dev, rx_buf, len);
+ writel_relaxed(MGR_INT_RX_MSG_RCVD, dev->base +
+ MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before signalling completion
+ */
+ mb();
+ complete(&dev->rx_msgq_notify);
+ } else if (mc == SLIM_MSG_MC_REPORT_INFORMATION) {
+ u8 *buf = (u8 *)rx_buf;
+ u8 l_addr = buf[2];
+ u16 ele = (u16)buf[4] << 4;
+
+ ele |= ((buf[3] & 0xf0) >> 4);
+ dev_err(dev->dev, "Slim-dev:%d report inf element:0x%x",
+ l_addr, ele);
+ for (i = 0; i < len - 5; i++)
+ dev_err(dev->dev, "offset:0x%x:bit mask:%x",
+ i, buf[i+5]);
+ writel_relaxed(MGR_INT_RX_MSG_RCVD, dev->base +
+ MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before exiting
+ */
+ mb();
+ } else {
+ dev_err(dev->dev, "Unexpected MC,%x MT:%x, len:%d",
+ mc, mt, len);
+ for (i = 0; i < ((len + 3) >> 2); i++)
+ dev_err(dev->dev, "error msg: %x", rx_buf[i]);
+ writel_relaxed(MGR_INT_RX_MSG_RCVD, dev->base +
+ MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before exiting
+ */
+ mb();
+ }
+ }
+ if (stat & MGR_INT_RECFG_DONE) {
+ writel_relaxed(MGR_INT_RECFG_DONE, dev->base + MGR_INT_CLR);
+ /*
+ * Guarantee that CLR bit write goes through
+ * before exiting ISR
+ */
+ mb();
+ complete(&dev->reconf);
+ }
+ pstat = readl_relaxed(PGD_THIS_EE(PGD_PORT_INT_ST_EEn, dev->ver));
+ if (pstat != 0)
+ return msm_slim_port_irq_handler(dev, pstat);
+
+ return IRQ_HANDLED;
+}
+
+static int msm_xfer_msg(struct slim_controller *ctrl, struct slim_msg_txn *txn)
+{
+ DECLARE_COMPLETION_ONSTACK(done);
+ struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
+ u32 *pbuf;
+ u8 *puc;
+ int timeout;
+ int msgv = -1;
+ u8 la = txn->la;
+ u8 mc = (u8)(txn->mc & 0xFF);
+ /*
+ * Voting for runtime PM: Slimbus has 2 possible use cases:
+ * 1. messaging
+ * 2. Data channels
+ * Messaging case goes through messaging slots and data channels
+ * use their own slots
+ * This "get" votes for messaging bandwidth
+ */
+ if (!(txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG))
+ msgv = msm_slim_get_ctrl(dev);
+ if (msgv >= 0)
+ dev->state = MSM_CTRL_AWAKE;
+ mutex_lock(&dev->tx_lock);
+ if (dev->state == MSM_CTRL_ASLEEP ||
+ ((!(txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG)) &&
+ dev->state == MSM_CTRL_IDLE)) {
+ dev_err(dev->dev, "runtime or system PM suspended state");
+ mutex_unlock(&dev->tx_lock);
+ if (msgv >= 0)
+ msm_slim_put_ctrl(dev);
+ return -EBUSY;
+ }
+ if (txn->mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_BEGIN_RECONFIGURATION) {
+ if (dev->reconf_busy) {
+ wait_for_completion(&dev->reconf);
+ dev->reconf_busy = false;
+ }
+ /* This "get" votes for data channels */
+ if (dev->ctrl.sched.usedslots != 0 &&
+ !dev->chan_active) {
+ int chv = msm_slim_get_ctrl(dev);
+
+ if (chv >= 0)
+ dev->chan_active = true;
+ }
+ }
+ txn->rl--;
+ pbuf = msm_get_msg_buf(dev, txn->rl, &done);
+ dev->err = 0;
+
+ if (txn->dt == SLIM_MSG_DEST_ENUMADDR) {
+ mutex_unlock(&dev->tx_lock);
+ if (msgv >= 0)
+ msm_slim_put_ctrl(dev);
+ return -EPROTONOSUPPORT;
+ }
+ if (txn->mt == SLIM_MSG_MT_CORE && txn->la == 0xFF &&
+ (mc == SLIM_MSG_MC_CONNECT_SOURCE ||
+ mc == SLIM_MSG_MC_CONNECT_SINK ||
+ mc == SLIM_MSG_MC_DISCONNECT_PORT))
+ la = dev->pgdla;
+ if (txn->dt == SLIM_MSG_DEST_LOGICALADDR)
+ *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, mc, 0, la);
+ else
+ *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, mc, 1, la);
+ if (txn->dt == SLIM_MSG_DEST_LOGICALADDR)
+ puc = ((u8 *)pbuf) + 3;
+ else
+ puc = ((u8 *)pbuf) + 2;
+ if (txn->rbuf)
+ *(puc++) = txn->tid;
+ if ((txn->mt == SLIM_MSG_MT_CORE) &&
+ ((mc >= SLIM_MSG_MC_REQUEST_INFORMATION &&
+ mc <= SLIM_MSG_MC_REPORT_INFORMATION) ||
+ (mc >= SLIM_MSG_MC_REQUEST_VALUE &&
+ mc <= SLIM_MSG_MC_CHANGE_VALUE))) {
+ *(puc++) = (txn->ec & 0xFF);
+ *(puc++) = (txn->ec >> 8)&0xFF;
+ }
+ if (txn->wbuf)
+ memcpy(puc, txn->wbuf, txn->len);
+ if (txn->mt == SLIM_MSG_MT_CORE && txn->la == 0xFF &&
+ (mc == SLIM_MSG_MC_CONNECT_SOURCE ||
+ mc == SLIM_MSG_MC_CONNECT_SINK ||
+ mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
+ if (mc != SLIM_MSG_MC_DISCONNECT_PORT)
+ dev->err = msm_slim_connect_pipe_port(dev, *puc);
+ else {
+ /*
+ * Remove channel disconnects master-side ports from
+ * channel. No need to send that again on the bus
+ * Only disable port
+ */
+ writel_relaxed(0, PGD_PORT(PGD_PORT_CFGn,
+ dev->pipes[*puc].port_b, dev->ver));
+ mutex_unlock(&dev->tx_lock);
+ if (msgv >= 0)
+ msm_slim_put_ctrl(dev);
+ return 0;
+ }
+ if (dev->err) {
+ dev_err(dev->dev, "pipe-port connect err:%d", dev->err);
+ mutex_unlock(&dev->tx_lock);
+ if (msgv >= 0)
+ msm_slim_put_ctrl(dev);
+ return dev->err;
+ }
+ *(puc) = (u8)dev->pipes[*puc].port_b;
+ }
+ if (txn->mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_BEGIN_RECONFIGURATION)
+ dev->reconf_busy = true;
+ msm_send_msg_buf(dev, pbuf, txn->rl, MGR_TX_MSG);
+ timeout = wait_for_completion_timeout(&done, HZ);
+ if (mc == SLIM_MSG_MC_RECONFIGURE_NOW) {
+ if ((txn->mc == (SLIM_MSG_MC_RECONFIGURE_NOW |
+ SLIM_MSG_CLK_PAUSE_SEQ_FLG)) &&
+ timeout) {
+ timeout = wait_for_completion_timeout(&dev->reconf, HZ);
+ dev->reconf_busy = false;
+ if (timeout) {
+ clk_disable_unprepare(dev->rclk);
+ disable_irq(dev->irq);
+ }
+ }
+ if ((txn->mc == (SLIM_MSG_MC_RECONFIGURE_NOW |
+ SLIM_MSG_CLK_PAUSE_SEQ_FLG)) &&
+ !timeout) {
+ dev->reconf_busy = false;
+ dev_err(dev->dev, "clock pause failed");
+ mutex_unlock(&dev->tx_lock);
+ return -ETIMEDOUT;
+ }
+ if (txn->mt == SLIM_MSG_MT_CORE &&
+ txn->mc == SLIM_MSG_MC_RECONFIGURE_NOW) {
+ if (dev->ctrl.sched.usedslots == 0 &&
+ dev->chan_active) {
+ dev->chan_active = false;
+ msm_slim_put_ctrl(dev);
+ }
+ }
+ }
+ mutex_unlock(&dev->tx_lock);
+ if (msgv >= 0)
+ msm_slim_put_ctrl(dev);
+
+ if (!timeout)
+ dev_err(dev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
+ txn->mt);
+
+ return timeout ? dev->err : -ETIMEDOUT;
+}
+
+static void msm_slim_wait_retry(struct msm_slim_ctrl *dev)
+{
+ int msec_per_frm = 0;
+ int sfr_per_sec;
+ /* Wait for 1 superframe, or default time and then retry */
+ sfr_per_sec = dev->framer.superfreq /
+ (1 << (SLIM_MAX_CLK_GEAR - dev->ctrl.clkgear));
+ if (sfr_per_sec)
+ msec_per_frm = MSEC_PER_SEC / sfr_per_sec;
+ if (msec_per_frm < DEF_RETRY_MS)
+ msec_per_frm = DEF_RETRY_MS;
+ msleep(msec_per_frm);
+}
+static int msm_set_laddr(struct slim_controller *ctrl, const u8 *ea,
+ u8 elen, u8 laddr)
+{
+ struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
+ struct completion done;
+ int timeout, ret, retries = 0;
+ u32 *buf;
+retry_laddr:
+ init_completion(&done);
+ mutex_lock(&dev->tx_lock);
+ buf = msm_get_msg_buf(dev, 9, &done);
+ if (buf == NULL)
+ return -ENOMEM;
+ buf[0] = SLIM_MSG_ASM_FIRST_WORD(9, SLIM_MSG_MT_CORE,
+ SLIM_MSG_MC_ASSIGN_LOGICAL_ADDRESS,
+ SLIM_MSG_DEST_LOGICALADDR,
+ ea[5] | ea[4] << 8);
+ buf[1] = ea[3] | (ea[2] << 8) | (ea[1] << 16) | (ea[0] << 24);
+ buf[2] = laddr;
+
+ ret = msm_send_msg_buf(dev, buf, 9, MGR_TX_MSG);
+ timeout = wait_for_completion_timeout(&done, HZ);
+ if (!timeout)
+ dev->err = -ETIMEDOUT;
+ if (dev->err) {
+ ret = dev->err;
+ dev->err = 0;
+ }
+ mutex_unlock(&dev->tx_lock);
+ if (ret) {
+ pr_err("set LADDR:0x%x failed:ret:%d, retrying", laddr, ret);
+ if (retries < INIT_MX_RETRIES) {
+ msm_slim_wait_retry(dev);
+ retries++;
+ goto retry_laddr;
+ } else {
+ pr_err("set LADDR failed after retrying:ret:%d", ret);
+ }
+ }
+ return ret;
+}
+
+static int msm_clk_pause_wakeup(struct slim_controller *ctrl)
+{
+ struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
+
+ enable_irq(dev->irq);
+ clk_prepare_enable(dev->rclk);
+ writel_relaxed(1, dev->base + FRM_WAKEUP);
+ /* Make sure framer wakeup write goes through before exiting function */
+ mb();
+ /*
+ * Workaround: Currently, slave is reporting lost-sync messages
+ * after slimbus comes out of clock pause.
+ * Transaction with slave fail before slave reports that message
+ * Give some time for that report to come
+ * Slimbus wakes up in clock gear 10 at 24.576MHz. With each superframe
+ * being 250 usecs, we wait for 20 superframes here to ensure
+ * we get the message
+ */
+ usleep_range(4950, 5000);
+ return 0;
+}
+
+static int msm_sat_define_ch(struct msm_slim_sat *sat, u8 *buf, u8 len, u8 mc)
+{
+ struct msm_slim_ctrl *dev = sat->dev;
+ enum slim_ch_control oper;
+ int i;
+ int ret = 0;
+
+ if (mc == SLIM_USR_MC_CHAN_CTRL) {
+ for (i = 0; i < sat->nsatch; i++) {
+ if (buf[5] == sat->satch[i].chan)
+ break;
+ }
+ if (i >= sat->nsatch)
+ return -ENOTCONN;
+ oper = ((buf[3] & 0xC0) >> 6);
+ /* part of grp. activating/removing 1 will take care of rest */
+ ret = slim_control_ch(&sat->satcl, sat->satch[i].chanh, oper,
+ false);
+ if (!ret) {
+ for (i = 5; i < len; i++) {
+ int j;
+
+ for (j = 0; j < sat->nsatch; j++) {
+ if (buf[i] != sat->satch[j].chan)
+ continue;
+
+ if (oper == SLIM_CH_REMOVE)
+ sat->satch[j].req_rem++;
+ else
+ sat->satch[j].req_def++;
+ break;
+ }
+ }
+ }
+ } else {
+ u16 chh[40];
+ struct slim_ch prop;
+ u32 exp;
+ u16 *grph = NULL;
+ u8 coeff, cc;
+ u8 prrate = buf[6];
+
+ if (len <= 8)
+ return -EINVAL;
+ for (i = 8; i < len; i++) {
+ int j = 0;
+
+ for (j = 0; j < sat->nsatch; j++) {
+ if (sat->satch[j].chan == buf[i]) {
+ chh[i - 8] = sat->satch[j].chanh;
+ break;
+ }
+ }
+ if (j < sat->nsatch) {
+ u16 dummy;
+
+ ret = slim_query_ch(&sat->satcl, buf[i],
+ &dummy);
+ if (ret)
+ return ret;
+ if (mc == SLIM_USR_MC_DEF_ACT_CHAN)
+ sat->satch[j].req_def++;
+ /* First channel in group from satellite */
+ if (i == 8)
+ grph = &sat->satch[j].chanh;
+ continue;
+ }
+ if (sat->nsatch >= MSM_MAX_SATCH)
+ return -EXFULL;
+ ret = slim_query_ch(&sat->satcl, buf[i], &chh[i - 8]);
+ if (ret)
+ return ret;
+ sat->satch[j].chan = buf[i];
+ sat->satch[j].chanh = chh[i - 8];
+ if (mc == SLIM_USR_MC_DEF_ACT_CHAN)
+ sat->satch[j].req_def++;
+ if (i == 8)
+ grph = &sat->satch[j].chanh;
+ sat->nsatch++;
+ }
+ prop.dataf = (enum slim_ch_dataf)((buf[3] & 0xE0) >> 5);
+ prop.auxf = (enum slim_ch_auxf)((buf[4] & 0xC0) >> 5);
+ prop.baser = SLIM_RATE_4000HZ;
+ if (prrate & 0x8)
+ prop.baser = SLIM_RATE_11025HZ;
+ else
+ prop.baser = SLIM_RATE_4000HZ;
+ prop.prot = (enum slim_ch_proto)(buf[5] & 0x0F);
+ prop.sampleszbits = (buf[4] & 0x1F)*SLIM_CL_PER_SL;
+ exp = (u32)((buf[5] & 0xF0) >> 4);
+ coeff = (buf[4] & 0x20) >> 5;
+ cc = (coeff ? 3 : 1);
+ prop.ratem = cc * (1 << exp);
+ if (i > 9)
+ ret = slim_define_ch(&sat->satcl, &prop, chh, len - 8,
+ true, &chh[0]);
+ else
+ ret = slim_define_ch(&sat->satcl, &prop,
+ chh, 1, true, &chh[0]);
+ dev_dbg(dev->dev, "define sat grp returned:%d", ret);
+ if (ret)
+ return ret;
+ else if (grph)
+ *grph = chh[0];
+
+ /* part of group so activating 1 will take care of rest */
+ if (mc == SLIM_USR_MC_DEF_ACT_CHAN)
+ ret = slim_control_ch(&sat->satcl,
+ chh[0],
+ SLIM_CH_ACTIVATE, false);
+ }
+ return ret;
+}
+
+static void msm_slim_rxwq(struct msm_slim_ctrl *dev)
+{
+ u8 buf[40];
+ u8 mc, mt, len;
+ int i, ret;
+
+ if ((msm_slim_rx_dequeue(dev, (u8 *)buf)) != -ENODATA) {
+ len = buf[0] & 0x1F;
+ mt = (buf[0] >> 5) & 0x7;
+ mc = buf[1];
+ if (mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_REPORT_PRESENT) {
+ u8 laddr;
+ u8 e_addr[6];
+
+ for (i = 0; i < 6; i++)
+ e_addr[i] = buf[7-i];
+
+ ret = slim_assign_laddr(&dev->ctrl, e_addr, 6, &laddr,
+ false);
+ /* Is this QTI ported generic device? */
+ if (!ret && e_addr[5] == QC_MFGID_LSB &&
+ e_addr[4] == QC_MFGID_MSB &&
+ e_addr[1] == QC_DEVID_PGD &&
+ e_addr[2] != QC_CHIPID_SL)
+ dev->pgdla = laddr;
+ if (!ret && !pm_runtime_enabled(dev->dev) &&
+ laddr == (QC_MSM_DEVS - 1))
+ pm_runtime_enable(dev->dev);
+
+ if (!ret && msm_is_sat_dev(e_addr)) {
+ struct msm_slim_sat *sat = addr_to_sat(dev,
+ laddr);
+ if (!sat)
+ sat = msm_slim_alloc_sat(dev);
+ if (!sat)
+ return;
+
+ sat->satcl.laddr = laddr;
+ msm_sat_enqueue(sat, (u32 *)buf, len);
+ queue_work(sat->wq, &sat->wd);
+ }
+ if (ret)
+ pr_err("assign laddr failed, error:%d", ret);
+ } else if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
+ mc == SLIM_MSG_MC_REPLY_VALUE) {
+ u8 tid = buf[3];
+
+ dev_dbg(dev->dev, "tid:%d, len:%d\n", tid, len - 4);
+ slim_msg_response(&dev->ctrl, &buf[4], tid,
+ len - 4);
+ pm_runtime_mark_last_busy(dev->dev);
+ } else if (mc == SLIM_MSG_MC_REPORT_INFORMATION) {
+ u8 l_addr = buf[2];
+ u16 ele = (u16)buf[4] << 4;
+
+ ele |= ((buf[3] & 0xf0) >> 4);
+ dev_err(dev->dev, "Slim-dev:%d report inf element:0x%x",
+ l_addr, ele);
+ for (i = 0; i < len - 5; i++)
+ dev_err(dev->dev, "offset:0x%x:bit mask:%x",
+ i, buf[i+5]);
+ } else {
+ dev_err(dev->dev, "unexpected message:mc:%x, mt:%x",
+ mc, mt);
+ for (i = 0; i < len; i++)
+ dev_err(dev->dev, "error msg: %x", buf[i]);
+
+ }
+ } else
+ dev_err(dev->dev, "rxwq called and no dequeue");
+}
+
+static void slim_sat_rxprocess(struct work_struct *work)
+{
+ struct msm_slim_sat *sat = container_of(work, struct msm_slim_sat, wd);
+ struct msm_slim_ctrl *dev = sat->dev;
+ u8 buf[40];
+
+ while ((msm_sat_dequeue(sat, buf)) != -ENODATA) {
+ struct slim_msg_txn txn;
+ u8 len, mc, mt;
+ u32 bw_sl;
+ int ret = 0;
+ int satv = -1;
+ bool gen_ack = false;
+ u8 tid;
+ u8 wbuf[8];
+ int i, retries = 0;
+
+ txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
+ txn.dt = SLIM_MSG_DEST_LOGICALADDR;
+ txn.ec = 0;
+ txn.rbuf = NULL;
+ txn.la = sat->satcl.laddr;
+ /* satellite handling */
+ len = buf[0] & 0x1F;
+ mc = buf[1];
+ mt = (buf[0] >> 5) & 0x7;
+
+ if (mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_REPORT_PRESENT) {
+ u8 e_addr[6];
+
+ for (i = 0; i < 6; i++)
+ e_addr[i] = buf[7-i];
+
+ if (pm_runtime_enabled(dev->dev)) {
+ satv = msm_slim_get_ctrl(dev);
+ if (satv >= 0)
+ sat->pending_capability = true;
+ }
+ /*
+ * Since capability message is already sent, present
+ * message will indicate subsystem hosting this
+ * satellite has restarted.
+ * Remove all active channels of this satellite
+ * when this is detected
+ */
+ if (sat->sent_capability) {
+ for (i = 0; i < sat->nsatch; i++) {
+ if (sat->satch[i].reconf) {
+ pr_err("SSR, sat:%d, rm ch:%d",
+ sat->satcl.laddr,
+ sat->satch[i].chan);
+ slim_control_ch(&sat->satcl,
+ sat->satch[i].chanh,
+ SLIM_CH_REMOVE, true);
+ slim_dealloc_ch(&sat->satcl,
+ sat->satch[i].chanh);
+ sat->satch[i].reconf = false;
+ }
+ }
+ }
+ } else if (mt != SLIM_MSG_MT_CORE &&
+ mc != SLIM_MSG_MC_REPORT_PRESENT) {
+ satv = msm_slim_get_ctrl(dev);
+ }
+ switch (mc) {
+ case SLIM_MSG_MC_REPORT_PRESENT:
+ /* Remove runtime_pm vote once satellite acks */
+ if (mt != SLIM_MSG_MT_CORE) {
+ if (pm_runtime_enabled(dev->dev) &&
+ sat->pending_capability) {
+ msm_slim_put_ctrl(dev);
+ sat->pending_capability = false;
+ }
+ continue;
+ }
+ /* send a Manager capability msg */
+ if (sat->sent_capability) {
+ if (mt == SLIM_MSG_MT_CORE)
+ goto send_capability;
+ else
+ continue;
+ }
+ ret = slim_add_device(&dev->ctrl, &sat->satcl);
+ if (ret) {
+ dev_err(dev->dev,
+ "Satellite-init failed");
+ continue;
+ }
+ /* Satellite-channels */
+ sat->satch = kzalloc(MSM_MAX_SATCH *
+ sizeof(struct msm_sat_chan),
+ GFP_KERNEL);
+send_capability:
+ txn.mc = SLIM_USR_MC_MASTER_CAPABILITY;
+ txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
+ txn.la = sat->satcl.laddr;
+ txn.rl = 8;
+ wbuf[0] = SAT_MAGIC_LSB;
+ wbuf[1] = SAT_MAGIC_MSB;
+ wbuf[2] = SAT_MSG_VER;
+ wbuf[3] = SAT_MSG_PROT;
+ txn.wbuf = wbuf;
+ txn.len = 4;
+ ret = msm_xfer_msg(&dev->ctrl, &txn);
+ if (ret) {
+ pr_err("capability for:0x%x fail:%d, retry:%d",
+ sat->satcl.laddr, ret, retries);
+ if (retries < INIT_MX_RETRIES) {
+ msm_slim_wait_retry(dev);
+ retries++;
+ goto send_capability;
+ } else {
+ pr_err("failed after all retries:%d",
+ ret);
+ }
+ } else {
+ sat->sent_capability = true;
+ }
+ break;
+ case SLIM_USR_MC_ADDR_QUERY:
+ memcpy(&wbuf[1], &buf[4], 6);
+ ret = slim_get_logical_addr(&sat->satcl,
+ &wbuf[1], 6, &wbuf[7]);
+ if (ret)
+ memset(&wbuf[1], 0, 6);
+ wbuf[0] = buf[3];
+ txn.mc = SLIM_USR_MC_ADDR_REPLY;
+ txn.rl = 12;
+ txn.len = 8;
+ txn.wbuf = wbuf;
+ msm_xfer_msg(&dev->ctrl, &txn);
+ break;
+ case SLIM_USR_MC_DEFINE_CHAN:
+ case SLIM_USR_MC_DEF_ACT_CHAN:
+ case SLIM_USR_MC_CHAN_CTRL:
+ if (mc != SLIM_USR_MC_CHAN_CTRL)
+ tid = buf[7];
+ else
+ tid = buf[4];
+ gen_ack = true;
+ ret = msm_sat_define_ch(sat, buf, len, mc);
+ if (ret) {
+ dev_err(dev->dev,
+ "SAT define_ch returned:%d",
+ ret);
+ }
+ if (!sat->pending_reconf) {
+ int chv = msm_slim_get_ctrl(dev);
+
+ if (chv >= 0)
+ sat->pending_reconf = true;
+ }
+ break;
+ case SLIM_USR_MC_RECONFIG_NOW:
+ tid = buf[3];
+ gen_ack = true;
+ ret = slim_reconfigure_now(&sat->satcl);
+ for (i = 0; i < sat->nsatch; i++) {
+ struct msm_sat_chan *sch = &sat->satch[i];
+
+ if (sch->req_rem && sch->reconf) {
+ if (!ret) {
+ slim_dealloc_ch(&sat->satcl,
+ sch->chanh);
+ sch->reconf = false;
+ }
+ sch->req_rem--;
+ } else if (sch->req_def) {
+ if (ret)
+ slim_dealloc_ch(&sat->satcl,
+ sch->chanh);
+ else
+ sch->reconf = true;
+ sch->req_def--;
+ }
+ }
+ if (sat->pending_reconf) {
+ msm_slim_put_ctrl(dev);
+ sat->pending_reconf = false;
+ }
+ break;
+ case SLIM_USR_MC_REQ_BW:
+ /* what we get is in SLOTS */
+ bw_sl = (u32)buf[4] << 3 |
+ ((buf[3] & 0xE0) >> 5);
+ sat->satcl.pending_msgsl = bw_sl;
+ tid = buf[5];
+ gen_ack = true;
+ break;
+ case SLIM_USR_MC_CONNECT_SRC:
+ case SLIM_USR_MC_CONNECT_SINK:
+ if (mc == SLIM_USR_MC_CONNECT_SRC)
+ txn.mc = SLIM_MSG_MC_CONNECT_SOURCE;
+ else
+ txn.mc = SLIM_MSG_MC_CONNECT_SINK;
+ wbuf[0] = buf[4] & 0x1F;
+ wbuf[1] = buf[5];
+ tid = buf[6];
+ txn.la = buf[3];
+ txn.mt = SLIM_MSG_MT_CORE;
+ txn.rl = 6;
+ txn.len = 2;
+ txn.wbuf = wbuf;
+ gen_ack = true;
+ ret = msm_xfer_msg(&dev->ctrl, &txn);
+ break;
+ case SLIM_USR_MC_DISCONNECT_PORT:
+ txn.mc = SLIM_MSG_MC_DISCONNECT_PORT;
+ wbuf[0] = buf[4] & 0x1F;
+ tid = buf[5];
+ txn.la = buf[3];
+ txn.rl = 5;
+ txn.len = 1;
+ txn.mt = SLIM_MSG_MT_CORE;
+ txn.wbuf = wbuf;
+ gen_ack = true;
+ ret = msm_xfer_msg(&dev->ctrl, &txn);
+ break;
+ case SLIM_MSG_MC_REPORT_ABSENT:
+ dev_info(dev->dev, "Received Report Absent Message\n");
+ break;
+ default:
+ break;
+ }
+ if (!gen_ack) {
+ if (mc != SLIM_MSG_MC_REPORT_PRESENT && satv >= 0)
+ msm_slim_put_ctrl(dev);
+ continue;
+ }
+
+ wbuf[0] = tid;
+ if (!ret)
+ wbuf[1] = MSM_SAT_SUCCSS;
+ else
+ wbuf[1] = 0;
+ txn.mc = SLIM_USR_MC_GENERIC_ACK;
+ txn.la = sat->satcl.laddr;
+ txn.rl = 6;
+ txn.len = 2;
+ txn.wbuf = wbuf;
+ txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
+ msm_xfer_msg(&dev->ctrl, &txn);
+ if (satv >= 0)
+ msm_slim_put_ctrl(dev);
+ }
+}
+
+static struct msm_slim_sat *msm_slim_alloc_sat(struct msm_slim_ctrl *dev)
+{
+ struct msm_slim_sat *sat;
+ char *name;
+
+ if (dev->nsats >= MSM_MAX_NSATS)
+ return NULL;
+
+ sat = kzalloc(sizeof(struct msm_slim_sat), GFP_KERNEL);
+ if (!sat)
+ return NULL;
+ name = kzalloc(SLIMBUS_NAME_SIZE, GFP_KERNEL);
+ if (!name) {
+ kfree(sat);
+ return NULL;
+ }
+ dev->satd[dev->nsats] = sat;
+ sat->dev = dev;
+ snprintf(name, SLIMBUS_NAME_SIZE, "msm_sat%d", dev->nsats);
+ sat->satcl.name = name;
+ spin_lock_init(&sat->lock);
+ INIT_WORK(&sat->wd, slim_sat_rxprocess);
+ sat->wq = create_singlethread_workqueue(sat->satcl.name);
+ if (!sat->wq) {
+ kfree(name);
+ kfree(sat);
+ return NULL;
+ }
+ /*
+ * Both sats will be allocated from RX thread and RX thread will
+ * process messages sequentially. No synchronization necessary
+ */
+ dev->nsats++;
+ return sat;
+}
+
+static int msm_slim_rx_msgq_thread(void *data)
+{
+ struct msm_slim_ctrl *dev = (struct msm_slim_ctrl *)data;
+ struct completion *notify = &dev->rx_msgq_notify;
+ struct msm_slim_sat *sat = NULL;
+ u32 mc = 0;
+ u32 mt = 0;
+ u32 buffer[10];
+ int index = 0;
+ u8 msg_len = 0;
+ int ret;
+
+ dev_dbg(dev->dev, "rx thread started");
+
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ ret = wait_for_completion_interruptible(notify);
+
+ if (ret)
+ dev_err(dev->dev, "rx thread wait error:%d", ret);
+
+ /* 1 irq notification per message */
+ if (dev->use_rx_msgqs != MSM_MSGQ_ENABLED) {
+ msm_slim_rxwq(dev);
+ continue;
+ }
+
+ ret = msm_slim_rx_msgq_get(dev, buffer, index);
+ if (ret) {
+ dev_err(dev->dev, "rx_msgq_get() failed 0x%x\n", ret);
+ continue;
+ }
+
+ pr_debug("message[%d] = 0x%x\n", index, *buffer);
+
+ /* Decide if we use generic RX or satellite RX */
+ if (index++ == 0) {
+ msg_len = *buffer & 0x1F;
+ pr_debug("Start of new message, len = %d\n", msg_len);
+ mt = (buffer[0] >> 5) & 0x7;
+ mc = (buffer[0] >> 8) & 0xff;
+ dev_dbg(dev->dev, "MC: %x, MT: %x\n", mc, mt);
+ if (mt == SLIM_MSG_MT_DEST_REFERRED_USER ||
+ mt == SLIM_MSG_MT_SRC_REFERRED_USER) {
+ u8 laddr;
+
+ laddr = (u8)((buffer[0] >> 16) & 0xff);
+ sat = addr_to_sat(dev, laddr);
+ }
+ }
+ if ((index * 4) >= msg_len) {
+ index = 0;
+ if (sat) {
+ msm_sat_enqueue(sat, buffer, msg_len);
+ queue_work(sat->wq, &sat->wd);
+ sat = NULL;
+ } else {
+ msm_slim_rx_enqueue(dev, buffer, msg_len);
+ msm_slim_rxwq(dev);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void msm_slim_prg_slew(struct platform_device *pdev,
+ struct msm_slim_ctrl *dev)
+{
+ struct resource *slew_io;
+ void __iomem *slew_reg;
+ /* SLEW RATE register for this slimbus */
+ dev->slew_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slimbus_slew_reg");
+ if (!dev->slew_mem) {
+ dev_dbg(&pdev->dev, "no slimbus slew resource\n");
+ return;
+ }
+ slew_io = request_mem_region(dev->slew_mem->start,
+ resource_size(dev->slew_mem), pdev->name);
+ if (!slew_io) {
+ dev_dbg(&pdev->dev, "slimbus-slew mem claimed\n");
+ dev->slew_mem = NULL;
+ return;
+ }
+
+ slew_reg = ioremap(dev->slew_mem->start, resource_size(dev->slew_mem));
+ if (!slew_reg) {
+ dev_dbg(dev->dev, "slew register mapping failed");
+ release_mem_region(dev->slew_mem->start,
+ resource_size(dev->slew_mem));
+ dev->slew_mem = NULL;
+ return;
+ }
+ writel_relaxed(1, slew_reg);
+ /* Make sure slimbus-slew rate enabling goes through */
+ wmb();
+ iounmap(slew_reg);
+}
+
+static int msm_slim_probe(struct platform_device *pdev)
+{
+ struct msm_slim_ctrl *dev;
+ int ret;
+ enum apr_subsys_state q6_state;
+ struct resource *bam_mem, *bam_io;
+ struct resource *slim_mem, *slim_io;
+ struct resource *irq, *bam_irq;
+ bool rxreg_access = false;
+
+ q6_state = apr_get_q6_state();
+ if (q6_state == APR_SUBSYS_DOWN) {
+ dev_dbg(&pdev->dev, "defering %s, adsp_state %d\n", __func__,
+ q6_state);
+ return -EPROBE_DEFER;
+ }
+ dev_dbg(&pdev->dev, "adsp is ready\n");
+
+ slim_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slimbus_physical");
+ if (!slim_mem) {
+ dev_err(&pdev->dev, "no slimbus physical memory resource\n");
+ return -ENODEV;
+ }
+ slim_io = request_mem_region(slim_mem->start, resource_size(slim_mem),
+ pdev->name);
+ if (!slim_io) {
+ dev_err(&pdev->dev, "slimbus memory already claimed\n");
+ return -EBUSY;
+ }
+
+ bam_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slimbus_bam_physical");
+ if (!bam_mem) {
+ dev_err(&pdev->dev, "no slimbus BAM memory resource\n");
+ ret = -ENODEV;
+ goto err_get_res_bam_failed;
+ }
+ bam_io = request_mem_region(bam_mem->start, resource_size(bam_mem),
+ pdev->name);
+ if (!bam_io) {
+ release_mem_region(slim_mem->start, resource_size(slim_mem));
+ dev_err(&pdev->dev, "slimbus BAM memory already claimed\n");
+ ret = -EBUSY;
+ goto err_get_res_bam_failed;
+ }
+ irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+ "slimbus_irq");
+ if (!irq) {
+ dev_err(&pdev->dev, "no slimbus IRQ resource\n");
+ ret = -ENODEV;
+ goto err_get_res_failed;
+ }
+ bam_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+ "slimbus_bam_irq");
+ if (!bam_irq) {
+ dev_err(&pdev->dev, "no slimbus BAM IRQ resource\n");
+ ret = -ENODEV;
+ goto err_get_res_failed;
+ }
+
+ dev = kzalloc(sizeof(struct msm_slim_ctrl), GFP_KERNEL);
+ if (!dev) {
+ ret = -ENOMEM;
+ goto err_get_res_failed;
+ }
+ dev->wr_comp = kzalloc(sizeof(struct completion *) * MSM_TX_BUFS,
+ GFP_KERNEL);
+ if (!dev->wr_comp)
+ return -ENOMEM;
+ dev->dev = &pdev->dev;
+ platform_set_drvdata(pdev, dev);
+ slim_set_ctrldata(&dev->ctrl, dev);
+ dev->base = ioremap(slim_mem->start, resource_size(slim_mem));
+ if (!dev->base) {
+ dev_err(&pdev->dev, "IOremap failed\n");
+ ret = -ENOMEM;
+ goto err_ioremap_failed;
+ }
+ dev->bam.base = ioremap(bam_mem->start, resource_size(bam_mem));
+ if (!dev->bam.base) {
+ dev_err(&pdev->dev, "BAM IOremap failed\n");
+ ret = -ENOMEM;
+ goto err_ioremap_bam_failed;
+ }
+ if (pdev->dev.of_node) {
+
+ ret = of_property_read_u32(pdev->dev.of_node, "cell-index",
+ &dev->ctrl.nr);
+ if (ret) {
+ dev_err(&pdev->dev, "Cell index not specified:%d", ret);
+ goto err_of_init_failed;
+ }
+ rxreg_access = of_property_read_bool(pdev->dev.of_node,
+ "qcom,rxreg-access");
+ /* Optional properties */
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "qcom,min-clk-gear", &dev->ctrl.min_cg);
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "qcom,max-clk-gear", &dev->ctrl.max_cg);
+ pr_debug("min_cg:%d, max_cg:%d, rxreg: %d", dev->ctrl.min_cg,
+ dev->ctrl.max_cg, rxreg_access);
+ } else {
+ dev->ctrl.nr = pdev->id;
+ }
+ dev->ctrl.nchans = MSM_SLIM_NCHANS;
+ dev->ctrl.nports = MSM_SLIM_NPORTS;
+ dev->ctrl.set_laddr = msm_set_laddr;
+ dev->ctrl.xfer_msg = msm_xfer_msg;
+ dev->ctrl.wakeup = msm_clk_pause_wakeup;
+ dev->ctrl.alloc_port = msm_alloc_port;
+ dev->ctrl.dealloc_port = msm_dealloc_port;
+ dev->ctrl.port_xfer = msm_slim_port_xfer;
+ dev->ctrl.port_xfer_status = msm_slim_port_xfer_status;
+ /* Reserve some messaging BW for satellite-apps driver communication */
+ dev->ctrl.sched.pending_msgsl = 30;
+
+ init_completion(&dev->reconf);
+ mutex_init(&dev->tx_lock);
+ spin_lock_init(&dev->rx_lock);
+ dev->ee = 1;
+ if (rxreg_access)
+ dev->use_rx_msgqs = MSM_MSGQ_DISABLED;
+ else
+ dev->use_rx_msgqs = MSM_MSGQ_RESET;
+
+ dev->irq = irq->start;
+ dev->bam.irq = bam_irq->start;
+
+ dev->hclk = clk_get(dev->dev, "iface_clk");
+ if (IS_ERR(dev->hclk))
+ dev->hclk = NULL;
+ else
+ clk_prepare_enable(dev->hclk);
+
+ ret = msm_slim_sps_init(dev, bam_mem, MGR_STATUS, false);
+ if (ret != 0) {
+ dev_err(dev->dev, "error SPS init\n");
+ goto err_sps_init_failed;
+ }
+
+ /* Fire up the Rx message queue thread */
+ dev->rx_msgq_thread = kthread_run(msm_slim_rx_msgq_thread, dev,
+ MSM_SLIM_NAME "_rx_msgq_thread");
+ if (IS_ERR(dev->rx_msgq_thread)) {
+ ret = PTR_ERR(dev->rx_msgq_thread);
+ dev_err(dev->dev, "Failed to start Rx message queue thread\n");
+ goto err_thread_create_failed;
+ }
+
+ dev->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
+ dev->framer.superfreq =
+ dev->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
+ dev->ctrl.a_framer = &dev->framer;
+ dev->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
+ dev->ctrl.dev.parent = &pdev->dev;
+ dev->ctrl.dev.of_node = pdev->dev.of_node;
+
+ ret = request_threaded_irq(dev->irq, NULL, msm_slim_interrupt,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "msm_slim_irq", dev);
+ if (ret) {
+ dev_err(&pdev->dev, "request IRQ failed\n");
+ goto err_request_irq_failed;
+ }
+
+ msm_slim_prg_slew(pdev, dev);
+
+ /* Register with framework before enabling frame, clock */
+ ret = slim_add_numbered_controller(&dev->ctrl);
+ if (ret) {
+ dev_err(dev->dev, "error adding controller\n");
+ goto err_ctrl_failed;
+ }
+
+
+ dev->rclk = clk_get(dev->dev, "core_clk");
+ if (!dev->rclk) {
+ dev_err(dev->dev, "slimbus clock not found");
+ goto err_clk_get_failed;
+ }
+ clk_set_rate(dev->rclk, SLIM_ROOT_FREQ);
+ clk_prepare_enable(dev->rclk);
+
+ dev->ver = readl_relaxed(dev->base);
+ /* Version info in 16 MSbits */
+ dev->ver >>= 16;
+ /* Component register initialization */
+ writel_relaxed(1, dev->base + CFG_PORT(COMP_CFG, dev->ver));
+ writel_relaxed((EE_MGR_RSC_GRP | EE_NGD_2 | EE_NGD_1),
+ dev->base + CFG_PORT(COMP_TRUST_CFG, dev->ver));
+
+ /*
+ * Manager register initialization
+ * If RX msg Q is used, disable RX_MSG_RCVD interrupt
+ */
+ if (dev->use_rx_msgqs == MSM_MSGQ_ENABLED)
+ writel_relaxed((MGR_INT_RECFG_DONE | MGR_INT_TX_NACKED_2 |
+ MGR_INT_MSG_BUF_CONTE | /* MGR_INT_RX_MSG_RCVD | */
+ MGR_INT_TX_MSG_SENT), dev->base + MGR_INT_EN);
+ else
+ writel_relaxed((MGR_INT_RECFG_DONE | MGR_INT_TX_NACKED_2 |
+ MGR_INT_MSG_BUF_CONTE | MGR_INT_RX_MSG_RCVD |
+ MGR_INT_TX_MSG_SENT), dev->base + MGR_INT_EN);
+ writel_relaxed(1, dev->base + MGR_CFG);
+ /*
+ * Framer registers are beyond 1K memory region after Manager and/or
+ * component registers. Make sure those writes are ordered
+ * before framer register writes
+ */
+ wmb();
+
+ /* Framer register initialization */
+ writel_relaxed((1 << INTR_WAKE) | (0xA << REF_CLK_GEAR) |
+ (0xA << CLK_GEAR) | (1 << ROOT_FREQ) | (1 << FRM_ACTIVE) | 1,
+ dev->base + FRM_CFG);
+ /*
+ * Make sure that framer wake-up and enabling writes go through
+ * before any other component is enabled. Framer is responsible for
+ * clocking the bus and enabling framer first will ensure that other
+ * devices can report presence when they are enabled
+ */
+ mb();
+
+ /* Enable RX msg Q */
+ if (dev->use_rx_msgqs == MSM_MSGQ_ENABLED)
+ writel_relaxed(MGR_CFG_ENABLE | MGR_CFG_RX_MSGQ_EN,
+ dev->base + MGR_CFG);
+ else
+ writel_relaxed(MGR_CFG_ENABLE, dev->base + MGR_CFG);
+ /*
+ * Make sure that manager-enable is written through before interface
+ * device is enabled
+ */
+ mb();
+ writel_relaxed(1, dev->base + INTF_CFG);
+ /*
+ * Make sure that interface-enable is written through before enabling
+ * ported generic device inside MSM manager
+ */
+ mb();
+ writel_relaxed(1, dev->base + CFG_PORT(PGD_CFG, dev->ver));
+ writel_relaxed(0x3F<<17, dev->base + CFG_PORT(PGD_OWN_EEn, dev->ver) +
+ (4 * dev->ee));
+ /*
+ * Make sure that ported generic device is enabled and port-EE settings
+ * are written through before finally enabling the component
+ */
+ mb();
+
+ writel_relaxed(1, dev->base + CFG_PORT(COMP_CFG, dev->ver));
+ /*
+ * Make sure that all writes have gone through before exiting this
+ * function
+ */
+ mb();
+
+ /* Add devices registered with board-info now that controller is up */
+ slim_ctrl_add_boarddevs(&dev->ctrl);
+
+ if (pdev->dev.of_node)
+ of_register_slim_devices(&dev->ctrl);
+
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, MSM_SLIM_AUTOSUSPEND);
+ pm_runtime_set_active(&pdev->dev);
+
+ dev_dbg(dev->dev, "MSM SB controller is up!\n");
+ return 0;
+
+err_ctrl_failed:
+ writel_relaxed(0, dev->base + CFG_PORT(COMP_CFG, dev->ver));
+err_clk_get_failed:
+ kfree(dev->satd);
+err_request_irq_failed:
+ kthread_stop(dev->rx_msgq_thread);
+err_thread_create_failed:
+ msm_slim_sps_exit(dev, true);
+ msm_slim_deinit_ep(dev, &dev->rx_msgq,
+ &dev->use_rx_msgqs);
+ msm_slim_deinit_ep(dev, &dev->tx_msgq,
+ &dev->use_tx_msgqs);
+err_sps_init_failed:
+ if (dev->hclk) {
+ clk_disable_unprepare(dev->hclk);
+ clk_put(dev->hclk);
+ }
+err_of_init_failed:
+ iounmap(dev->bam.base);
+err_ioremap_bam_failed:
+ iounmap(dev->base);
+err_ioremap_failed:
+ kfree(dev->wr_comp);
+ kfree(dev);
+err_get_res_failed:
+ release_mem_region(bam_mem->start, resource_size(bam_mem));
+err_get_res_bam_failed:
+ release_mem_region(slim_mem->start, resource_size(slim_mem));
+ return ret;
+}
+
+static int msm_slim_remove(struct platform_device *pdev)
+{
+ struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
+ struct resource *bam_mem;
+ struct resource *slim_mem;
+ struct resource *slew_mem = dev->slew_mem;
+ int i;
+
+ for (i = 0; i < dev->nsats; i++) {
+ struct msm_slim_sat *sat = dev->satd[i];
+ int j;
+
+ for (j = 0; j < sat->nsatch; j++)
+ slim_dealloc_ch(&sat->satcl, sat->satch[j].chanh);
+ slim_remove_device(&sat->satcl);
+ kfree(sat->satch);
+ destroy_workqueue(sat->wq);
+ kfree(sat->satcl.name);
+ kfree(sat);
+ }
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_set_suspended(&pdev->dev);
+ free_irq(dev->irq, dev);
+ slim_del_controller(&dev->ctrl);
+ clk_put(dev->rclk);
+ if (dev->hclk)
+ clk_put(dev->hclk);
+ msm_slim_sps_exit(dev, true);
+ msm_slim_deinit_ep(dev, &dev->rx_msgq,
+ &dev->use_rx_msgqs);
+ msm_slim_deinit_ep(dev, &dev->tx_msgq,
+ &dev->use_tx_msgqs);
+
+ kthread_stop(dev->rx_msgq_thread);
+ iounmap(dev->bam.base);
+ iounmap(dev->base);
+ kfree(dev->wr_comp);
+ kfree(dev);
+ bam_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slimbus_bam_physical");
+ if (bam_mem)
+ release_mem_region(bam_mem->start, resource_size(bam_mem));
+ if (slew_mem)
+ release_mem_region(slew_mem->start, resource_size(slew_mem));
+ slim_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slimbus_physical");
+ if (slim_mem)
+ release_mem_region(slim_mem->start, resource_size(slim_mem));
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int msm_slim_runtime_idle(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
+
+ if (dev->state == MSM_CTRL_AWAKE)
+ dev->state = MSM_CTRL_IDLE;
+ dev_dbg(device, "pm_runtime: idle...\n");
+ pm_request_autosuspend(device);
+ return -EAGAIN;
+}
+#endif
+
+/*
+ * If PM_RUNTIME is not defined, these 2 functions become helper
+ * functions to be called from system suspend/resume. So they are not
+ * inside ifdef CONFIG_PM_RUNTIME
+ */
+#ifdef CONFIG_PM
+static int msm_slim_runtime_suspend(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
+ int ret;
+
+ dev_dbg(device, "pm_runtime: suspending...\n");
+ ret = slim_ctrl_clk_pause(&dev->ctrl, false, SLIM_CLK_UNSPECIFIED);
+ if (ret) {
+ dev_err(device, "clk pause not entered:%d", ret);
+ dev->state = MSM_CTRL_AWAKE;
+ } else {
+ dev->state = MSM_CTRL_ASLEEP;
+ }
+ return ret;
+}
+
+static int msm_slim_runtime_resume(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ dev_dbg(device, "pm_runtime: resuming...\n");
+ if (dev->state == MSM_CTRL_ASLEEP)
+ ret = slim_ctrl_clk_pause(&dev->ctrl, true, 0);
+ if (ret) {
+ dev_err(device, "clk pause not exited:%d", ret);
+ dev->state = MSM_CTRL_ASLEEP;
+ } else {
+ dev->state = MSM_CTRL_AWAKE;
+ }
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int msm_slim_suspend(struct device *dev)
+{
+ int ret = -EBUSY;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct msm_slim_ctrl *cdev = platform_get_drvdata(pdev);
+
+ if (!pm_runtime_enabled(dev) ||
+ (!pm_runtime_suspended(dev) &&
+ cdev->state == MSM_CTRL_IDLE)) {
+ dev_dbg(dev, "system suspend");
+ ret = msm_slim_runtime_suspend(dev);
+ if (!ret) {
+ if (cdev->hclk)
+ clk_disable_unprepare(cdev->hclk);
+ }
+ }
+ if (ret == -EBUSY) {
+ /*
+ * If the clock pause failed due to active channels, there is
+ * a possibility that some audio stream is active during suspend
+ * We dont want to return suspend failure in that case so that
+ * display and relevant components can still go to suspend.
+ * If there is some other error, then it should be passed-on
+ * to system level suspend
+ */
+ ret = 0;
+ }
+ return ret;
+}
+
+static int msm_slim_resume(struct device *dev)
+{
+ /* If runtime_pm is enabled, this resume shouldn't do anything */
+ if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+ struct platform_device *pdev = to_platform_device(dev);
+ struct msm_slim_ctrl *cdev = platform_get_drvdata(pdev);
+ int ret;
+
+ dev_dbg(dev, "system resume");
+ if (cdev->hclk)
+ clk_prepare_enable(cdev->hclk);
+ ret = msm_slim_runtime_resume(dev);
+ if (!ret) {
+ pm_runtime_mark_last_busy(dev);
+ pm_request_autosuspend(dev);
+ }
+ return ret;
+
+ }
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops msm_slim_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(
+ msm_slim_suspend,
+ msm_slim_resume
+ )
+ SET_RUNTIME_PM_OPS(
+ msm_slim_runtime_suspend,
+ msm_slim_runtime_resume,
+ msm_slim_runtime_idle
+ )
+};
+
+static const struct of_device_id msm_slim_dt_match[] = {
+ {
+ .compatible = "qcom,slim-msm",
+ },
+ {}
+};
+
+static struct platform_driver msm_slim_driver = {
+ .probe = msm_slim_probe,
+ .remove = msm_slim_remove,
+ .driver = {
+ .name = MSM_SLIM_NAME,
+ .owner = THIS_MODULE,
+ .pm = &msm_slim_dev_pm_ops,
+ .of_match_table = msm_slim_dt_match,
+ },
+};
+
+static int msm_slim_init(void)
+{
+ return platform_driver_register(&msm_slim_driver);
+}
+subsys_initcall(msm_slim_init);
+
+static void msm_slim_exit(void)
+{
+ platform_driver_unregister(&msm_slim_driver);
+}
+module_exit(msm_slim_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MSM Slimbus controller");
+MODULE_ALIAS("platform:msm-slim");