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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2016 Broadcom Limited
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "spi-bcm-qspi.h"
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#define INTR_BASE_BIT_SHIFT 0x02
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#define INTR_COUNT 0x07
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struct bcm_iproc_intc {
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struct bcm_qspi_soc_intc soc_intc;
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struct platform_device *pdev;
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void __iomem *int_reg;
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void __iomem *int_status_reg;
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spinlock_t soclock;
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bool big_endian;
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};
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static u32 bcm_iproc_qspi_get_l2_int_status(struct bcm_qspi_soc_intc *soc_intc)
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{
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struct bcm_iproc_intc *priv =
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container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
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void __iomem *mmio = priv->int_status_reg;
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int i;
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u32 val = 0, sts = 0;
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for (i = 0; i < INTR_COUNT; i++) {
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if (bcm_qspi_readl(priv->big_endian, mmio + (i * 4)))
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val |= 1UL << i;
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}
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if (val & INTR_MSPI_DONE_MASK)
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sts |= MSPI_DONE;
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if (val & BSPI_LR_INTERRUPTS_ALL)
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sts |= BSPI_DONE;
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if (val & BSPI_LR_INTERRUPTS_ERROR)
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sts |= BSPI_ERR;
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return sts;
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}
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static void bcm_iproc_qspi_int_ack(struct bcm_qspi_soc_intc *soc_intc, int type)
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{
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struct bcm_iproc_intc *priv =
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container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
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void __iomem *mmio = priv->int_status_reg;
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u32 mask = get_qspi_mask(type);
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int i;
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for (i = 0; i < INTR_COUNT; i++) {
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if (mask & (1UL << i))
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bcm_qspi_writel(priv->big_endian, 1, mmio + (i * 4));
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}
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}
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static void bcm_iproc_qspi_int_set(struct bcm_qspi_soc_intc *soc_intc, int type,
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bool en)
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{
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struct bcm_iproc_intc *priv =
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container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
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void __iomem *mmio = priv->int_reg;
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u32 mask = get_qspi_mask(type);
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u32 val;
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unsigned long flags;
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spin_lock_irqsave(&priv->soclock, flags);
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val = bcm_qspi_readl(priv->big_endian, mmio);
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if (en)
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val = val | (mask << INTR_BASE_BIT_SHIFT);
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else
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val = val & ~(mask << INTR_BASE_BIT_SHIFT);
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bcm_qspi_writel(priv->big_endian, val, mmio);
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spin_unlock_irqrestore(&priv->soclock, flags);
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}
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static int bcm_iproc_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct bcm_iproc_intc *priv;
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struct bcm_qspi_soc_intc *soc_intc;
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struct resource *res;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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soc_intc = &priv->soc_intc;
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priv->pdev = pdev;
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spin_lock_init(&priv->soclock);
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr_regs");
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priv->int_reg = devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->int_reg))
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return PTR_ERR(priv->int_reg);
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
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"intr_status_reg");
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priv->int_status_reg = devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->int_status_reg))
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return PTR_ERR(priv->int_status_reg);
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priv->big_endian = of_device_is_big_endian(dev->of_node);
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bcm_iproc_qspi_int_ack(soc_intc, MSPI_BSPI_DONE);
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bcm_iproc_qspi_int_set(soc_intc, MSPI_BSPI_DONE, false);
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soc_intc->bcm_qspi_int_ack = bcm_iproc_qspi_int_ack;
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soc_intc->bcm_qspi_int_set = bcm_iproc_qspi_int_set;
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soc_intc->bcm_qspi_get_int_status = bcm_iproc_qspi_get_l2_int_status;
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return bcm_qspi_probe(pdev, soc_intc);
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}
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static int bcm_iproc_remove(struct platform_device *pdev)
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{
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return bcm_qspi_remove(pdev);
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}
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static const struct of_device_id bcm_iproc_of_match[] = {
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{ .compatible = "brcm,spi-nsp-qspi" },
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{ .compatible = "brcm,spi-ns2-qspi" },
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{},
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};
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MODULE_DEVICE_TABLE(of, bcm_iproc_of_match);
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static struct platform_driver bcm_iproc_driver = {
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.probe = bcm_iproc_probe,
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.remove = bcm_iproc_remove,
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.driver = {
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.name = "bcm_iproc",
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.pm = &bcm_qspi_pm_ops,
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.of_match_table = bcm_iproc_of_match,
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}
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};
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module_platform_driver(bcm_iproc_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Kamal Dasu");
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MODULE_DESCRIPTION("SPI flash driver for Broadcom iProc SoCs");
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