v4.19.13 snapshot.
diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
new file mode 100644
index 0000000..db1f513
--- /dev/null
+++ b/drivers/slimbus/qcom-ctrl.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2011-2017, The Linux Foundation
+ */
+
+#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/delay.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include "slimbus.h"
+
+/* Manager registers */
+#define MGR_CFG 0x200
+#define MGR_STATUS 0x204
+#define MGR_INT_EN 0x210
+#define MGR_INT_STAT 0x214
+#define MGR_INT_CLR 0x218
+#define MGR_TX_MSG 0x230
+#define MGR_RX_MSG 0x270
+#define MGR_IE_STAT 0x2F0
+#define MGR_VE_STAT 0x300
+#define MGR_CFG_ENABLE 1
+
+/* Framer registers */
+#define FRM_CFG 0x400
+#define FRM_STAT 0x404
+#define FRM_INT_EN 0x410
+#define FRM_INT_STAT 0x414
+#define FRM_INT_CLR 0x418
+#define FRM_WAKEUP 0x41C
+#define FRM_CLKCTL_DONE 0x420
+#define FRM_IE_STAT 0x430
+#define FRM_VE_STAT 0x440
+
+/* Interface registers */
+#define INTF_CFG 0x600
+#define INTF_STAT 0x604
+#define INTF_INT_EN 0x610
+#define INTF_INT_STAT 0x614
+#define INTF_INT_CLR 0x618
+#define INTF_IE_STAT 0x630
+#define INTF_VE_STAT 0x640
+
+/* Interrupt status bits */
+#define MGR_INT_TX_NACKED_2 BIT(25)
+#define MGR_INT_MSG_BUF_CONTE BIT(26)
+#define MGR_INT_RX_MSG_RCVD BIT(30)
+#define MGR_INT_TX_MSG_SENT BIT(31)
+
+/* Framer config register settings */
+#define FRM_ACTIVE 1
+#define CLK_GEAR 7
+#define ROOT_FREQ 11
+#define REF_CLK_GEAR 15
+#define INTR_WAKE 19
+
+#define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
+ ((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
+
+#define SLIM_ROOT_FREQ 24576000
+#define QCOM_SLIM_AUTOSUSPEND 1000
+
+/* MAX message size over control channel */
+#define SLIM_MSGQ_BUF_LEN 40
+#define QCOM_TX_MSGS 2
+#define QCOM_RX_MSGS 8
+#define QCOM_BUF_ALLOC_RETRIES 10
+
+#define CFG_PORT(r, v) ((v) ? CFG_PORT_V2(r) : CFG_PORT_V1(r))
+
+/* V2 Component registers */
+#define CFG_PORT_V2(r) ((r ## _V2))
+#define COMP_CFG_V2 4
+#define COMP_TRUST_CFG_V2 0x3000
+
+/* V1 Component registers */
+#define CFG_PORT_V1(r) ((r ## _V1))
+#define COMP_CFG_V1 0
+#define COMP_TRUST_CFG_V1 0x14
+
+/* Resource group info for manager, and non-ported generic device-components */
+#define EE_MGR_RSC_GRP (1 << 10)
+#define EE_NGD_2 (2 << 6)
+#define EE_NGD_1 0
+
+struct slim_ctrl_buf {
+ void *base;
+ spinlock_t lock;
+ int head;
+ int tail;
+ int sl_sz;
+ int n;
+};
+
+struct qcom_slim_ctrl {
+ struct slim_controller ctrl;
+ struct slim_framer framer;
+ struct device *dev;
+ void __iomem *base;
+ void __iomem *slew_reg;
+
+ struct slim_ctrl_buf rx;
+ struct slim_ctrl_buf tx;
+
+ struct completion **wr_comp;
+ int irq;
+ struct workqueue_struct *rxwq;
+ struct work_struct wd;
+ struct clk *rclk;
+ struct clk *hclk;
+};
+
+static void qcom_slim_queue_tx(struct qcom_slim_ctrl *ctrl, void *buf,
+ u8 len, u32 tx_reg)
+{
+ int count = (len + 3) >> 2;
+
+ __iowrite32_copy(ctrl->base + tx_reg, buf, count);
+
+ /* Ensure Oder of subsequent writes */
+ mb();
+}
+
+static void *slim_alloc_rxbuf(struct qcom_slim_ctrl *ctrl)
+{
+ unsigned long flags;
+ int idx;
+
+ spin_lock_irqsave(&ctrl->rx.lock, flags);
+ if ((ctrl->rx.tail + 1) % ctrl->rx.n == ctrl->rx.head) {
+ spin_unlock_irqrestore(&ctrl->rx.lock, flags);
+ dev_err(ctrl->dev, "RX QUEUE full!");
+ return NULL;
+ }
+ idx = ctrl->rx.tail;
+ ctrl->rx.tail = (ctrl->rx.tail + 1) % ctrl->rx.n;
+ spin_unlock_irqrestore(&ctrl->rx.lock, flags);
+
+ return ctrl->rx.base + (idx * ctrl->rx.sl_sz);
+}
+
+static void slim_ack_txn(struct qcom_slim_ctrl *ctrl, int err)
+{
+ struct completion *comp;
+ unsigned long flags;
+ int idx;
+
+ spin_lock_irqsave(&ctrl->tx.lock, flags);
+ idx = ctrl->tx.head;
+ ctrl->tx.head = (ctrl->tx.head + 1) % ctrl->tx.n;
+ spin_unlock_irqrestore(&ctrl->tx.lock, flags);
+
+ comp = ctrl->wr_comp[idx];
+ ctrl->wr_comp[idx] = NULL;
+
+ complete(comp);
+}
+
+static irqreturn_t qcom_slim_handle_tx_irq(struct qcom_slim_ctrl *ctrl,
+ u32 stat)
+{
+ int err = 0;
+
+ if (stat & MGR_INT_TX_MSG_SENT)
+ writel_relaxed(MGR_INT_TX_MSG_SENT,
+ ctrl->base + MGR_INT_CLR);
+
+ if (stat & MGR_INT_TX_NACKED_2) {
+ u32 mgr_stat = readl_relaxed(ctrl->base + MGR_STATUS);
+ u32 mgr_ie_stat = readl_relaxed(ctrl->base + MGR_IE_STAT);
+ u32 frm_stat = readl_relaxed(ctrl->base + FRM_STAT);
+ u32 frm_cfg = readl_relaxed(ctrl->base + FRM_CFG);
+ u32 frm_intr_stat = readl_relaxed(ctrl->base + FRM_INT_STAT);
+ u32 frm_ie_stat = readl_relaxed(ctrl->base + FRM_IE_STAT);
+ u32 intf_stat = readl_relaxed(ctrl->base + INTF_STAT);
+ u32 intf_intr_stat = readl_relaxed(ctrl->base + INTF_INT_STAT);
+ u32 intf_ie_stat = readl_relaxed(ctrl->base + INTF_IE_STAT);
+
+ writel_relaxed(MGR_INT_TX_NACKED_2, ctrl->base + MGR_INT_CLR);
+
+ dev_err(ctrl->dev, "TX Nack MGR:int:0x%x, stat:0x%x\n",
+ stat, mgr_stat);
+ dev_err(ctrl->dev, "TX Nack MGR:ie:0x%x\n", mgr_ie_stat);
+ dev_err(ctrl->dev, "TX Nack FRM:int:0x%x, stat:0x%x\n",
+ frm_intr_stat, frm_stat);
+ dev_err(ctrl->dev, "TX Nack FRM:cfg:0x%x, ie:0x%x\n",
+ frm_cfg, frm_ie_stat);
+ dev_err(ctrl->dev, "TX Nack INTF:intr:0x%x, stat:0x%x\n",
+ intf_intr_stat, intf_stat);
+ dev_err(ctrl->dev, "TX Nack INTF:ie:0x%x\n",
+ intf_ie_stat);
+ err = -ENOTCONN;
+ }
+
+ slim_ack_txn(ctrl, err);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t qcom_slim_handle_rx_irq(struct qcom_slim_ctrl *ctrl,
+ u32 stat)
+{
+ u32 *rx_buf, pkt[10];
+ bool q_rx = false;
+ u8 mc, mt, len;
+
+ pkt[0] = readl_relaxed(ctrl->base + MGR_RX_MSG);
+ mt = SLIM_HEADER_GET_MT(pkt[0]);
+ len = SLIM_HEADER_GET_RL(pkt[0]);
+ mc = SLIM_HEADER_GET_MC(pkt[0]>>8);
+
+ /*
+ * this message cannot be handled by ISR, so
+ * let work-queue handle it
+ */
+ if (mt == SLIM_MSG_MT_CORE && mc == SLIM_MSG_MC_REPORT_PRESENT) {
+ rx_buf = (u32 *)slim_alloc_rxbuf(ctrl);
+ if (!rx_buf) {
+ dev_err(ctrl->dev, "dropping RX:0x%x due to RX full\n",
+ pkt[0]);
+ goto rx_ret_irq;
+ }
+ rx_buf[0] = pkt[0];
+
+ } else {
+ rx_buf = pkt;
+ }
+
+ __ioread32_copy(rx_buf + 1, ctrl->base + MGR_RX_MSG + 4,
+ DIV_ROUND_UP(len, 4));
+
+ switch (mc) {
+
+ case SLIM_MSG_MC_REPORT_PRESENT:
+ q_rx = true;
+ break;
+ case SLIM_MSG_MC_REPLY_INFORMATION:
+ case SLIM_MSG_MC_REPLY_VALUE:
+ slim_msg_response(&ctrl->ctrl, (u8 *)(rx_buf + 1),
+ (u8)(*rx_buf >> 24), (len - 4));
+ break;
+ default:
+ dev_err(ctrl->dev, "unsupported MC,%x MT:%x\n",
+ mc, mt);
+ break;
+ }
+rx_ret_irq:
+ writel(MGR_INT_RX_MSG_RCVD, ctrl->base +
+ MGR_INT_CLR);
+ if (q_rx)
+ queue_work(ctrl->rxwq, &ctrl->wd);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t qcom_slim_interrupt(int irq, void *d)
+{
+ struct qcom_slim_ctrl *ctrl = d;
+ u32 stat = readl_relaxed(ctrl->base + MGR_INT_STAT);
+ int ret = IRQ_NONE;
+
+ if (stat & MGR_INT_TX_MSG_SENT || stat & MGR_INT_TX_NACKED_2)
+ ret = qcom_slim_handle_tx_irq(ctrl, stat);
+
+ if (stat & MGR_INT_RX_MSG_RCVD)
+ ret = qcom_slim_handle_rx_irq(ctrl, stat);
+
+ return ret;
+}
+
+static int qcom_clk_pause_wakeup(struct slim_controller *sctrl)
+{
+ struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
+
+ clk_prepare_enable(ctrl->hclk);
+ clk_prepare_enable(ctrl->rclk);
+ enable_irq(ctrl->irq);
+
+ writel_relaxed(1, ctrl->base + FRM_WAKEUP);
+ /* Make sure framer wakeup write goes through before ISR fires */
+ mb();
+ /*
+ * HW 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 5-10 superframes here to ensure
+ * we get the message
+ */
+ usleep_range(1250, 2500);
+ return 0;
+}
+
+static void *slim_alloc_txbuf(struct qcom_slim_ctrl *ctrl,
+ struct slim_msg_txn *txn,
+ struct completion *done)
+{
+ unsigned long flags;
+ int idx;
+
+ spin_lock_irqsave(&ctrl->tx.lock, flags);
+ if (((ctrl->tx.head + 1) % ctrl->tx.n) == ctrl->tx.tail) {
+ spin_unlock_irqrestore(&ctrl->tx.lock, flags);
+ dev_err(ctrl->dev, "controller TX buf unavailable");
+ return NULL;
+ }
+ idx = ctrl->tx.tail;
+ ctrl->wr_comp[idx] = done;
+ ctrl->tx.tail = (ctrl->tx.tail + 1) % ctrl->tx.n;
+
+ spin_unlock_irqrestore(&ctrl->tx.lock, flags);
+
+ return ctrl->tx.base + (idx * ctrl->tx.sl_sz);
+}
+
+
+static int qcom_xfer_msg(struct slim_controller *sctrl,
+ struct slim_msg_txn *txn)
+{
+ struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
+ DECLARE_COMPLETION_ONSTACK(done);
+ void *pbuf = slim_alloc_txbuf(ctrl, txn, &done);
+ unsigned long ms = txn->rl + HZ;
+ u8 *puc;
+ int ret = 0, timeout, retries = QCOM_BUF_ALLOC_RETRIES;
+ u8 la = txn->la;
+ u32 *head;
+ /* HW expects length field to be excluded */
+ txn->rl--;
+
+ /* spin till buffer is made available */
+ if (!pbuf) {
+ while (retries--) {
+ usleep_range(10000, 15000);
+ pbuf = slim_alloc_txbuf(ctrl, txn, &done);
+ if (pbuf)
+ break;
+ }
+ }
+
+ if (retries < 0 && !pbuf)
+ return -ENOMEM;
+
+ puc = (u8 *)pbuf;
+ head = (u32 *)pbuf;
+
+ if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
+ *head = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt,
+ txn->mc, 0, la);
+ puc += 3;
+ } else {
+ *head = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt,
+ txn->mc, 1, la);
+ puc += 2;
+ }
+
+ if (slim_tid_txn(txn->mt, txn->mc))
+ *(puc++) = txn->tid;
+
+ if (slim_ec_txn(txn->mt, txn->mc)) {
+ *(puc++) = (txn->ec & 0xFF);
+ *(puc++) = (txn->ec >> 8) & 0xFF;
+ }
+
+ if (txn->msg && txn->msg->wbuf)
+ memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
+
+ qcom_slim_queue_tx(ctrl, head, txn->rl, MGR_TX_MSG);
+ timeout = wait_for_completion_timeout(&done, msecs_to_jiffies(ms));
+
+ if (!timeout) {
+ dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
+ txn->mt);
+ ret = -ETIMEDOUT;
+ }
+
+ return ret;
+
+}
+
+static int qcom_set_laddr(struct slim_controller *sctrl,
+ struct slim_eaddr *ead, u8 laddr)
+{
+ struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
+ struct {
+ __be16 manf_id;
+ __be16 prod_code;
+ u8 dev_index;
+ u8 instance;
+ u8 laddr;
+ } __packed p;
+ struct slim_val_inf msg = {0};
+ DEFINE_SLIM_EDEST_TXN(txn, SLIM_MSG_MC_ASSIGN_LOGICAL_ADDRESS,
+ 10, laddr, &msg);
+ int ret;
+
+ p.manf_id = cpu_to_be16(ead->manf_id);
+ p.prod_code = cpu_to_be16(ead->prod_code);
+ p.dev_index = ead->dev_index;
+ p.instance = ead->instance;
+ p.laddr = laddr;
+
+ msg.wbuf = (void *)&p;
+ msg.num_bytes = 7;
+ ret = slim_do_transfer(&ctrl->ctrl, &txn);
+
+ if (ret)
+ dev_err(ctrl->dev, "set LA:0x%x failed:ret:%d\n",
+ laddr, ret);
+ return ret;
+}
+
+static int slim_get_current_rxbuf(struct qcom_slim_ctrl *ctrl, void *buf)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->rx.lock, flags);
+ if (ctrl->rx.tail == ctrl->rx.head) {
+ spin_unlock_irqrestore(&ctrl->rx.lock, flags);
+ return -ENODATA;
+ }
+ memcpy(buf, ctrl->rx.base + (ctrl->rx.head * ctrl->rx.sl_sz),
+ ctrl->rx.sl_sz);
+
+ ctrl->rx.head = (ctrl->rx.head + 1) % ctrl->rx.n;
+ spin_unlock_irqrestore(&ctrl->rx.lock, flags);
+
+ return 0;
+}
+
+static void qcom_slim_rxwq(struct work_struct *work)
+{
+ u8 buf[SLIM_MSGQ_BUF_LEN];
+ u8 mc, mt;
+ int ret;
+ struct qcom_slim_ctrl *ctrl = container_of(work, struct qcom_slim_ctrl,
+ wd);
+
+ while ((slim_get_current_rxbuf(ctrl, buf)) != -ENODATA) {
+ mt = SLIM_HEADER_GET_MT(buf[0]);
+ mc = SLIM_HEADER_GET_MC(buf[1]);
+ if (mt == SLIM_MSG_MT_CORE &&
+ mc == SLIM_MSG_MC_REPORT_PRESENT) {
+ struct slim_eaddr ea;
+ u8 laddr;
+
+ ea.manf_id = be16_to_cpup((__be16 *)&buf[2]);
+ ea.prod_code = be16_to_cpup((__be16 *)&buf[4]);
+ ea.dev_index = buf[6];
+ ea.instance = buf[7];
+
+ ret = slim_device_report_present(&ctrl->ctrl, &ea,
+ &laddr);
+ if (ret < 0)
+ dev_err(ctrl->dev, "assign laddr failed:%d\n",
+ ret);
+ } else {
+ dev_err(ctrl->dev, "unexpected message:mc:%x, mt:%x\n",
+ mc, mt);
+ }
+ }
+}
+
+static void qcom_slim_prg_slew(struct platform_device *pdev,
+ struct qcom_slim_ctrl *ctrl)
+{
+ struct resource *slew_mem;
+
+ if (!ctrl->slew_reg) {
+ /* SLEW RATE register for this SLIMbus */
+ slew_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "slew");
+ ctrl->slew_reg = devm_ioremap(&pdev->dev, slew_mem->start,
+ resource_size(slew_mem));
+ if (!ctrl->slew_reg)
+ return;
+ }
+
+ writel_relaxed(1, ctrl->slew_reg);
+ /* Make sure SLIMbus-slew rate enabling goes through */
+ wmb();
+}
+
+static int qcom_slim_probe(struct platform_device *pdev)
+{
+ struct qcom_slim_ctrl *ctrl;
+ struct slim_controller *sctrl;
+ struct resource *slim_mem;
+ int ret, ver;
+
+ ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ ctrl->hclk = devm_clk_get(&pdev->dev, "iface");
+ if (IS_ERR(ctrl->hclk))
+ return PTR_ERR(ctrl->hclk);
+
+ ctrl->rclk = devm_clk_get(&pdev->dev, "core");
+ if (IS_ERR(ctrl->rclk))
+ return PTR_ERR(ctrl->rclk);
+
+ ret = clk_set_rate(ctrl->rclk, SLIM_ROOT_FREQ);
+ if (ret) {
+ dev_err(&pdev->dev, "ref-clock set-rate failed:%d\n", ret);
+ return ret;
+ }
+
+ ctrl->irq = platform_get_irq(pdev, 0);
+ if (!ctrl->irq) {
+ dev_err(&pdev->dev, "no slimbus IRQ\n");
+ return -ENODEV;
+ }
+
+ sctrl = &ctrl->ctrl;
+ sctrl->dev = &pdev->dev;
+ ctrl->dev = &pdev->dev;
+ platform_set_drvdata(pdev, ctrl);
+ dev_set_drvdata(ctrl->dev, ctrl);
+
+ slim_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
+ ctrl->base = devm_ioremap_resource(ctrl->dev, slim_mem);
+ if (IS_ERR(ctrl->base)) {
+ dev_err(&pdev->dev, "IOremap failed\n");
+ return PTR_ERR(ctrl->base);
+ }
+
+ sctrl->set_laddr = qcom_set_laddr;
+ sctrl->xfer_msg = qcom_xfer_msg;
+ sctrl->wakeup = qcom_clk_pause_wakeup;
+ ctrl->tx.n = QCOM_TX_MSGS;
+ ctrl->tx.sl_sz = SLIM_MSGQ_BUF_LEN;
+ ctrl->rx.n = QCOM_RX_MSGS;
+ ctrl->rx.sl_sz = SLIM_MSGQ_BUF_LEN;
+ ctrl->wr_comp = kcalloc(QCOM_TX_MSGS, sizeof(struct completion *),
+ GFP_KERNEL);
+ if (!ctrl->wr_comp)
+ return -ENOMEM;
+
+ spin_lock_init(&ctrl->rx.lock);
+ spin_lock_init(&ctrl->tx.lock);
+ INIT_WORK(&ctrl->wd, qcom_slim_rxwq);
+ ctrl->rxwq = create_singlethread_workqueue("qcom_slim_rx");
+ if (!ctrl->rxwq) {
+ dev_err(ctrl->dev, "Failed to start Rx WQ\n");
+ return -ENOMEM;
+ }
+
+ ctrl->framer.rootfreq = SLIM_ROOT_FREQ / 8;
+ ctrl->framer.superfreq =
+ ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
+ sctrl->a_framer = &ctrl->framer;
+ sctrl->clkgear = SLIM_MAX_CLK_GEAR;
+
+ qcom_slim_prg_slew(pdev, ctrl);
+
+ ret = devm_request_irq(&pdev->dev, ctrl->irq, qcom_slim_interrupt,
+ IRQF_TRIGGER_HIGH, "qcom_slim_irq", ctrl);
+ if (ret) {
+ dev_err(&pdev->dev, "request IRQ failed\n");
+ goto err_request_irq_failed;
+ }
+
+ ret = clk_prepare_enable(ctrl->hclk);
+ if (ret)
+ goto err_hclk_enable_failed;
+
+ ret = clk_prepare_enable(ctrl->rclk);
+ if (ret)
+ goto err_rclk_enable_failed;
+
+ ctrl->tx.base = devm_kcalloc(&pdev->dev, ctrl->tx.n, ctrl->tx.sl_sz,
+ GFP_KERNEL);
+ if (!ctrl->tx.base) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ctrl->rx.base = devm_kcalloc(&pdev->dev,ctrl->rx.n, ctrl->rx.sl_sz,
+ GFP_KERNEL);
+ if (!ctrl->rx.base) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* Register with framework before enabling frame, clock */
+ ret = slim_register_controller(&ctrl->ctrl);
+ if (ret) {
+ dev_err(ctrl->dev, "error adding controller\n");
+ goto err;
+ }
+
+ ver = readl_relaxed(ctrl->base);
+ /* Version info in 16 MSbits */
+ ver >>= 16;
+ /* Component register initialization */
+ writel(1, ctrl->base + CFG_PORT(COMP_CFG, ver));
+ writel((EE_MGR_RSC_GRP | EE_NGD_2 | EE_NGD_1),
+ ctrl->base + CFG_PORT(COMP_TRUST_CFG, ver));
+
+ writel((MGR_INT_TX_NACKED_2 |
+ MGR_INT_MSG_BUF_CONTE | MGR_INT_RX_MSG_RCVD |
+ MGR_INT_TX_MSG_SENT), ctrl->base + MGR_INT_EN);
+ writel(1, ctrl->base + MGR_CFG);
+ /* Framer register initialization */
+ writel((1 << INTR_WAKE) | (0xA << REF_CLK_GEAR) |
+ (0xA << CLK_GEAR) | (1 << ROOT_FREQ) | (1 << FRM_ACTIVE) | 1,
+ ctrl->base + FRM_CFG);
+ writel(MGR_CFG_ENABLE, ctrl->base + MGR_CFG);
+ writel(1, ctrl->base + INTF_CFG);
+ writel(1, ctrl->base + CFG_PORT(COMP_CFG, ver));
+
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, QCOM_SLIM_AUTOSUSPEND);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_mark_last_busy(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ dev_dbg(ctrl->dev, "QCOM SB controller is up:ver:0x%x!\n", ver);
+ return 0;
+
+err:
+ clk_disable_unprepare(ctrl->rclk);
+err_rclk_enable_failed:
+ clk_disable_unprepare(ctrl->hclk);
+err_hclk_enable_failed:
+err_request_irq_failed:
+ destroy_workqueue(ctrl->rxwq);
+ return ret;
+}
+
+static int qcom_slim_remove(struct platform_device *pdev)
+{
+ struct qcom_slim_ctrl *ctrl = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ slim_unregister_controller(&ctrl->ctrl);
+ destroy_workqueue(ctrl->rxwq);
+ return 0;
+}
+
+/*
+ * If PM_RUNTIME is not defined, these 2 functions become helper
+ * functions to be called from system suspend/resume.
+ */
+#ifdef CONFIG_PM
+static int qcom_slim_runtime_suspend(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct qcom_slim_ctrl *ctrl = platform_get_drvdata(pdev);
+ int ret;
+
+ dev_dbg(device, "pm_runtime: suspending...\n");
+ ret = slim_ctrl_clk_pause(&ctrl->ctrl, false, SLIM_CLK_UNSPECIFIED);
+ if (ret) {
+ dev_err(device, "clk pause not entered:%d", ret);
+ } else {
+ disable_irq(ctrl->irq);
+ clk_disable_unprepare(ctrl->hclk);
+ clk_disable_unprepare(ctrl->rclk);
+ }
+ return ret;
+}
+
+static int qcom_slim_runtime_resume(struct device *device)
+{
+ struct platform_device *pdev = to_platform_device(device);
+ struct qcom_slim_ctrl *ctrl = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ dev_dbg(device, "pm_runtime: resuming...\n");
+ ret = slim_ctrl_clk_pause(&ctrl->ctrl, true, 0);
+ if (ret)
+ dev_err(device, "clk pause not exited:%d", ret);
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int qcom_slim_suspend(struct device *dev)
+{
+ int ret = 0;
+
+ if (!pm_runtime_enabled(dev) ||
+ (!pm_runtime_suspended(dev))) {
+ dev_dbg(dev, "system suspend");
+ ret = qcom_slim_runtime_suspend(dev);
+ }
+
+ return ret;
+}
+
+static int qcom_slim_resume(struct device *dev)
+{
+ if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+ int ret;
+
+ dev_dbg(dev, "system resume");
+ ret = qcom_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 qcom_slim_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(qcom_slim_suspend, qcom_slim_resume)
+ SET_RUNTIME_PM_OPS(
+ qcom_slim_runtime_suspend,
+ qcom_slim_runtime_resume,
+ NULL
+ )
+};
+
+static const struct of_device_id qcom_slim_dt_match[] = {
+ { .compatible = "qcom,slim", },
+ { .compatible = "qcom,apq8064-slim", },
+ {}
+};
+
+static struct platform_driver qcom_slim_driver = {
+ .probe = qcom_slim_probe,
+ .remove = qcom_slim_remove,
+ .driver = {
+ .name = "qcom_slim_ctrl",
+ .of_match_table = qcom_slim_dt_match,
+ .pm = &qcom_slim_dev_pm_ops,
+ },
+};
+module_platform_driver(qcom_slim_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm SLIMbus Controller");