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synced 2024-08-29 20:30:35 +00:00
![Zhang Changzhong](/assets/img/avatar_default.png)
platform_get_resource_byname() may fail and in this case a NULL
dereference will occur.
Fix it to use devm_platform_ioremap_resource_byname() instead of calling
platform_get_resource_byname() and devm_ioremap().
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t,
n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Fixes: ad7fcbc308
("slimbus: qcom: Add Qualcomm Slimbus controller driver")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1607392473-20610-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
739 lines
18 KiB
C
739 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2011-2017, The Linux Foundation
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*/
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/pm_runtime.h>
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#include "slimbus.h"
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/* Manager registers */
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#define MGR_CFG 0x200
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#define MGR_STATUS 0x204
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#define MGR_INT_EN 0x210
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#define MGR_INT_STAT 0x214
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#define MGR_INT_CLR 0x218
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#define MGR_TX_MSG 0x230
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#define MGR_RX_MSG 0x270
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#define MGR_IE_STAT 0x2F0
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#define MGR_VE_STAT 0x300
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#define MGR_CFG_ENABLE 1
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/* Framer registers */
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#define FRM_CFG 0x400
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#define FRM_STAT 0x404
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#define FRM_INT_EN 0x410
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#define FRM_INT_STAT 0x414
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#define FRM_INT_CLR 0x418
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#define FRM_WAKEUP 0x41C
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#define FRM_CLKCTL_DONE 0x420
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#define FRM_IE_STAT 0x430
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#define FRM_VE_STAT 0x440
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/* Interface registers */
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#define INTF_CFG 0x600
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#define INTF_STAT 0x604
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#define INTF_INT_EN 0x610
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#define INTF_INT_STAT 0x614
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#define INTF_INT_CLR 0x618
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#define INTF_IE_STAT 0x630
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#define INTF_VE_STAT 0x640
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/* Interrupt status bits */
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#define MGR_INT_TX_NACKED_2 BIT(25)
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#define MGR_INT_MSG_BUF_CONTE BIT(26)
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#define MGR_INT_RX_MSG_RCVD BIT(30)
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#define MGR_INT_TX_MSG_SENT BIT(31)
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/* Framer config register settings */
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#define FRM_ACTIVE 1
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#define CLK_GEAR 7
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#define ROOT_FREQ 11
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#define REF_CLK_GEAR 15
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#define INTR_WAKE 19
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#define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
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((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
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#define SLIM_ROOT_FREQ 24576000
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#define QCOM_SLIM_AUTOSUSPEND 1000
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/* MAX message size over control channel */
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#define SLIM_MSGQ_BUF_LEN 40
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#define QCOM_TX_MSGS 2
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#define QCOM_RX_MSGS 8
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#define QCOM_BUF_ALLOC_RETRIES 10
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#define CFG_PORT(r, v) ((v) ? CFG_PORT_V2(r) : CFG_PORT_V1(r))
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/* V2 Component registers */
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#define CFG_PORT_V2(r) ((r ## _V2))
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#define COMP_CFG_V2 4
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#define COMP_TRUST_CFG_V2 0x3000
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/* V1 Component registers */
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#define CFG_PORT_V1(r) ((r ## _V1))
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#define COMP_CFG_V1 0
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#define COMP_TRUST_CFG_V1 0x14
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/* Resource group info for manager, and non-ported generic device-components */
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#define EE_MGR_RSC_GRP (1 << 10)
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#define EE_NGD_2 (2 << 6)
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#define EE_NGD_1 0
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struct slim_ctrl_buf {
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void *base;
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spinlock_t lock;
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int head;
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int tail;
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int sl_sz;
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int n;
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};
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struct qcom_slim_ctrl {
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struct slim_controller ctrl;
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struct slim_framer framer;
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struct device *dev;
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void __iomem *base;
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void __iomem *slew_reg;
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struct slim_ctrl_buf rx;
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struct slim_ctrl_buf tx;
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struct completion **wr_comp;
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int irq;
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struct workqueue_struct *rxwq;
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struct work_struct wd;
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struct clk *rclk;
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struct clk *hclk;
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};
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static void qcom_slim_queue_tx(struct qcom_slim_ctrl *ctrl, void *buf,
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u8 len, u32 tx_reg)
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{
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int count = (len + 3) >> 2;
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__iowrite32_copy(ctrl->base + tx_reg, buf, count);
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/* Ensure Oder of subsequent writes */
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mb();
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}
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static void *slim_alloc_rxbuf(struct qcom_slim_ctrl *ctrl)
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{
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unsigned long flags;
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int idx;
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spin_lock_irqsave(&ctrl->rx.lock, flags);
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if ((ctrl->rx.tail + 1) % ctrl->rx.n == ctrl->rx.head) {
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spin_unlock_irqrestore(&ctrl->rx.lock, flags);
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dev_err(ctrl->dev, "RX QUEUE full!");
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return NULL;
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}
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idx = ctrl->rx.tail;
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ctrl->rx.tail = (ctrl->rx.tail + 1) % ctrl->rx.n;
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spin_unlock_irqrestore(&ctrl->rx.lock, flags);
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return ctrl->rx.base + (idx * ctrl->rx.sl_sz);
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}
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static void slim_ack_txn(struct qcom_slim_ctrl *ctrl, int err)
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{
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struct completion *comp;
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unsigned long flags;
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int idx;
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spin_lock_irqsave(&ctrl->tx.lock, flags);
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idx = ctrl->tx.head;
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ctrl->tx.head = (ctrl->tx.head + 1) % ctrl->tx.n;
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spin_unlock_irqrestore(&ctrl->tx.lock, flags);
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comp = ctrl->wr_comp[idx];
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ctrl->wr_comp[idx] = NULL;
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complete(comp);
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}
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static irqreturn_t qcom_slim_handle_tx_irq(struct qcom_slim_ctrl *ctrl,
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u32 stat)
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{
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int err = 0;
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if (stat & MGR_INT_TX_MSG_SENT)
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writel_relaxed(MGR_INT_TX_MSG_SENT,
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ctrl->base + MGR_INT_CLR);
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if (stat & MGR_INT_TX_NACKED_2) {
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u32 mgr_stat = readl_relaxed(ctrl->base + MGR_STATUS);
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u32 mgr_ie_stat = readl_relaxed(ctrl->base + MGR_IE_STAT);
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u32 frm_stat = readl_relaxed(ctrl->base + FRM_STAT);
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u32 frm_cfg = readl_relaxed(ctrl->base + FRM_CFG);
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u32 frm_intr_stat = readl_relaxed(ctrl->base + FRM_INT_STAT);
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u32 frm_ie_stat = readl_relaxed(ctrl->base + FRM_IE_STAT);
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u32 intf_stat = readl_relaxed(ctrl->base + INTF_STAT);
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u32 intf_intr_stat = readl_relaxed(ctrl->base + INTF_INT_STAT);
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u32 intf_ie_stat = readl_relaxed(ctrl->base + INTF_IE_STAT);
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writel_relaxed(MGR_INT_TX_NACKED_2, ctrl->base + MGR_INT_CLR);
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dev_err(ctrl->dev, "TX Nack MGR:int:0x%x, stat:0x%x\n",
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stat, mgr_stat);
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dev_err(ctrl->dev, "TX Nack MGR:ie:0x%x\n", mgr_ie_stat);
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dev_err(ctrl->dev, "TX Nack FRM:int:0x%x, stat:0x%x\n",
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frm_intr_stat, frm_stat);
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dev_err(ctrl->dev, "TX Nack FRM:cfg:0x%x, ie:0x%x\n",
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frm_cfg, frm_ie_stat);
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dev_err(ctrl->dev, "TX Nack INTF:intr:0x%x, stat:0x%x\n",
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intf_intr_stat, intf_stat);
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dev_err(ctrl->dev, "TX Nack INTF:ie:0x%x\n",
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intf_ie_stat);
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err = -ENOTCONN;
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}
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slim_ack_txn(ctrl, err);
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return IRQ_HANDLED;
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}
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static irqreturn_t qcom_slim_handle_rx_irq(struct qcom_slim_ctrl *ctrl,
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u32 stat)
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{
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u32 *rx_buf, pkt[10];
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bool q_rx = false;
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u8 mc, mt, len;
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pkt[0] = readl_relaxed(ctrl->base + MGR_RX_MSG);
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mt = SLIM_HEADER_GET_MT(pkt[0]);
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len = SLIM_HEADER_GET_RL(pkt[0]);
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mc = SLIM_HEADER_GET_MC(pkt[0]>>8);
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/*
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* this message cannot be handled by ISR, so
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* let work-queue handle it
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*/
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if (mt == SLIM_MSG_MT_CORE && mc == SLIM_MSG_MC_REPORT_PRESENT) {
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rx_buf = (u32 *)slim_alloc_rxbuf(ctrl);
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if (!rx_buf) {
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dev_err(ctrl->dev, "dropping RX:0x%x due to RX full\n",
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pkt[0]);
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goto rx_ret_irq;
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}
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rx_buf[0] = pkt[0];
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} else {
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rx_buf = pkt;
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}
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__ioread32_copy(rx_buf + 1, ctrl->base + MGR_RX_MSG + 4,
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DIV_ROUND_UP(len, 4));
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switch (mc) {
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case SLIM_MSG_MC_REPORT_PRESENT:
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q_rx = true;
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break;
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case SLIM_MSG_MC_REPLY_INFORMATION:
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case SLIM_MSG_MC_REPLY_VALUE:
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slim_msg_response(&ctrl->ctrl, (u8 *)(rx_buf + 1),
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(u8)(*rx_buf >> 24), (len - 4));
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break;
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default:
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dev_err(ctrl->dev, "unsupported MC,%x MT:%x\n",
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mc, mt);
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break;
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}
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rx_ret_irq:
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writel(MGR_INT_RX_MSG_RCVD, ctrl->base +
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MGR_INT_CLR);
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if (q_rx)
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queue_work(ctrl->rxwq, &ctrl->wd);
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return IRQ_HANDLED;
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}
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static irqreturn_t qcom_slim_interrupt(int irq, void *d)
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{
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struct qcom_slim_ctrl *ctrl = d;
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u32 stat = readl_relaxed(ctrl->base + MGR_INT_STAT);
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int ret = IRQ_NONE;
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if (stat & MGR_INT_TX_MSG_SENT || stat & MGR_INT_TX_NACKED_2)
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ret = qcom_slim_handle_tx_irq(ctrl, stat);
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if (stat & MGR_INT_RX_MSG_RCVD)
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ret = qcom_slim_handle_rx_irq(ctrl, stat);
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return ret;
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}
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static int qcom_clk_pause_wakeup(struct slim_controller *sctrl)
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{
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struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
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clk_prepare_enable(ctrl->hclk);
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clk_prepare_enable(ctrl->rclk);
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enable_irq(ctrl->irq);
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writel_relaxed(1, ctrl->base + FRM_WAKEUP);
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/* Make sure framer wakeup write goes through before ISR fires */
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mb();
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/*
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* HW Workaround: Currently, slave is reporting lost-sync messages
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* after SLIMbus comes out of clock pause.
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* Transaction with slave fail before slave reports that message
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* Give some time for that report to come
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* SLIMbus wakes up in clock gear 10 at 24.576MHz. With each superframe
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* being 250 usecs, we wait for 5-10 superframes here to ensure
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* we get the message
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*/
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usleep_range(1250, 2500);
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return 0;
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}
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static void *slim_alloc_txbuf(struct qcom_slim_ctrl *ctrl,
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struct slim_msg_txn *txn,
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struct completion *done)
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{
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unsigned long flags;
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int idx;
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spin_lock_irqsave(&ctrl->tx.lock, flags);
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if (((ctrl->tx.head + 1) % ctrl->tx.n) == ctrl->tx.tail) {
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spin_unlock_irqrestore(&ctrl->tx.lock, flags);
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dev_err(ctrl->dev, "controller TX buf unavailable");
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return NULL;
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}
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idx = ctrl->tx.tail;
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ctrl->wr_comp[idx] = done;
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ctrl->tx.tail = (ctrl->tx.tail + 1) % ctrl->tx.n;
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spin_unlock_irqrestore(&ctrl->tx.lock, flags);
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return ctrl->tx.base + (idx * ctrl->tx.sl_sz);
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}
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static int qcom_xfer_msg(struct slim_controller *sctrl,
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struct slim_msg_txn *txn)
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{
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struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
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DECLARE_COMPLETION_ONSTACK(done);
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void *pbuf = slim_alloc_txbuf(ctrl, txn, &done);
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unsigned long ms = txn->rl + HZ;
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u8 *puc;
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int ret = 0, timeout, retries = QCOM_BUF_ALLOC_RETRIES;
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u8 la = txn->la;
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u32 *head;
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/* HW expects length field to be excluded */
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txn->rl--;
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/* spin till buffer is made available */
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if (!pbuf) {
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while (retries--) {
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usleep_range(10000, 15000);
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pbuf = slim_alloc_txbuf(ctrl, txn, &done);
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if (pbuf)
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break;
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}
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}
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if (retries < 0 && !pbuf)
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return -ENOMEM;
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puc = (u8 *)pbuf;
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head = (u32 *)pbuf;
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if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
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*head = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt,
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txn->mc, 0, la);
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puc += 3;
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} else {
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*head = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt,
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txn->mc, 1, la);
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puc += 2;
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}
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if (slim_tid_txn(txn->mt, txn->mc))
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*(puc++) = txn->tid;
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if (slim_ec_txn(txn->mt, txn->mc)) {
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*(puc++) = (txn->ec & 0xFF);
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*(puc++) = (txn->ec >> 8) & 0xFF;
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}
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if (txn->msg && txn->msg->wbuf)
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memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
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qcom_slim_queue_tx(ctrl, head, txn->rl, MGR_TX_MSG);
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timeout = wait_for_completion_timeout(&done, msecs_to_jiffies(ms));
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if (!timeout) {
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dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
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txn->mt);
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ret = -ETIMEDOUT;
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}
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return ret;
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}
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static int qcom_set_laddr(struct slim_controller *sctrl,
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struct slim_eaddr *ead, u8 laddr)
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{
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struct qcom_slim_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
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struct {
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__be16 manf_id;
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__be16 prod_code;
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u8 dev_index;
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u8 instance;
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u8 laddr;
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} __packed p;
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struct slim_val_inf msg = {0};
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DEFINE_SLIM_EDEST_TXN(txn, SLIM_MSG_MC_ASSIGN_LOGICAL_ADDRESS,
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10, laddr, &msg);
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int ret;
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p.manf_id = cpu_to_be16(ead->manf_id);
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p.prod_code = cpu_to_be16(ead->prod_code);
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p.dev_index = ead->dev_index;
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p.instance = ead->instance;
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p.laddr = laddr;
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msg.wbuf = (void *)&p;
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msg.num_bytes = 7;
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ret = slim_do_transfer(&ctrl->ctrl, &txn);
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if (ret)
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dev_err(ctrl->dev, "set LA:0x%x failed:ret:%d\n",
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laddr, ret);
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return ret;
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}
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static int slim_get_current_rxbuf(struct qcom_slim_ctrl *ctrl, void *buf)
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{
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unsigned long flags;
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spin_lock_irqsave(&ctrl->rx.lock, flags);
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if (ctrl->rx.tail == ctrl->rx.head) {
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spin_unlock_irqrestore(&ctrl->rx.lock, flags);
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return -ENODATA;
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}
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memcpy(buf, ctrl->rx.base + (ctrl->rx.head * ctrl->rx.sl_sz),
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ctrl->rx.sl_sz);
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ctrl->rx.head = (ctrl->rx.head + 1) % ctrl->rx.n;
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spin_unlock_irqrestore(&ctrl->rx.lock, flags);
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return 0;
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}
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static void qcom_slim_rxwq(struct work_struct *work)
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{
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u8 buf[SLIM_MSGQ_BUF_LEN];
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u8 mc, mt;
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int ret;
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struct qcom_slim_ctrl *ctrl = container_of(work, struct qcom_slim_ctrl,
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wd);
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while ((slim_get_current_rxbuf(ctrl, buf)) != -ENODATA) {
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mt = SLIM_HEADER_GET_MT(buf[0]);
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mc = SLIM_HEADER_GET_MC(buf[1]);
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if (mt == SLIM_MSG_MT_CORE &&
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mc == SLIM_MSG_MC_REPORT_PRESENT) {
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struct slim_eaddr ea;
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u8 laddr;
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ea.manf_id = be16_to_cpup((__be16 *)&buf[2]);
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ea.prod_code = be16_to_cpup((__be16 *)&buf[4]);
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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;
|
|
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))
|
|
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);
|
|
clk_disable_unprepare(ctrl->rclk);
|
|
clk_disable_unprepare(ctrl->hclk);
|
|
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 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", },
|
|
{ .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");
|