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path: root/drivers/slimbus/qcom-ctrl.c
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Diffstat (limited to 'drivers/slimbus/qcom-ctrl.c')
-rw-r--r--drivers/slimbus/qcom-ctrl.c735
1 files changed, 0 insertions, 735 deletions
diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
deleted file mode 100644
index ab344f7472f2..000000000000
--- a/drivers/slimbus/qcom-ctrl.c
+++ /dev/null
@@ -1,735 +0,0 @@
-// 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, retries = QCOM_BUF_ALLOC_RETRIES;
- unsigned long time_left;
- 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);
- time_left = wait_for_completion_timeout(&done, msecs_to_jiffies(ms));
-
- if (!time_left) {
- 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)
-{
- if (!ctrl->slew_reg) {
- /* SLEW RATE register for this SLIMbus */
- ctrl->slew_reg = devm_platform_ioremap_resource_byname(pdev, "slew");
- if (IS_ERR(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;
- 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 < 0)
- return ctrl->irq;
-
- sctrl = &ctrl->ctrl;
- sctrl->dev = &pdev->dev;
- ctrl->dev = &pdev->dev;
- platform_set_drvdata(pdev, ctrl);
- dev_set_drvdata(ctrl->dev, ctrl);
-
- ctrl->base = devm_platform_ioremap_resource_byname(pdev, "ctrl");
- if (IS_ERR(ctrl->base))
- 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 void 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);
- clk_disable_unprepare(ctrl->rclk);
- clk_disable_unprepare(ctrl->hclk);
- destroy_workqueue(ctrl->rxwq);
-}
-
-/*
- * 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 qcom_slim_ctrl *ctrl = dev_get_drvdata(device);
- 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 qcom_slim_ctrl *ctrl = dev_get_drvdata(device);
- 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", },
- {}
-};
-MODULE_DEVICE_TABLE(of, qcom_slim_dt_match);
-
-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");
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-05 20:03:10 +0000