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dd36980020
In few places usage of ret variable is not needed. This patch simplifies those pieces of code. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/*
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* Synopsys DesignWare Multimedia Card PCI Interface driver
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*
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* Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/dw_mmc.h>
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#include "dw_mmc.h"
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#define PCI_BAR_NO 2
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#define COMPLETE_BAR 0
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#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
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#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
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/* Defining the Capabilities */
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#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
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MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
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MMC_CAP_SDIO_IRQ)
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static struct dw_mci_board pci_board_data = {
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.num_slots = 1,
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.caps = DW_MCI_CAPABILITIES,
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.bus_hz = 33 * 1000 * 1000,
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.detect_delay_ms = 200,
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.fifo_depth = 32,
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};
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static int dw_mci_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *entries)
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{
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struct dw_mci *host;
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int ret;
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ret = pci_enable_device(pdev);
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if (ret)
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return ret;
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if (pci_request_regions(pdev, "dw_mmc_pci")) {
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ret = -ENODEV;
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goto err_disable_dev;
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}
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host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
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if (!host) {
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ret = -ENOMEM;
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goto err_release;
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}
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host->irq = pdev->irq;
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host->irq_flags = IRQF_SHARED;
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host->dev = &pdev->dev;
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host->pdata = &pci_board_data;
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host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
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if (!host->regs) {
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ret = -EIO;
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goto err_unmap;
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}
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pci_set_drvdata(pdev, host);
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ret = dw_mci_probe(host);
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if (ret)
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goto err_probe_failed;
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return ret;
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err_probe_failed:
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pci_iounmap(pdev, host->regs);
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err_unmap:
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kfree(host);
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err_release:
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pci_release_regions(pdev);
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err_disable_dev:
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pci_disable_device(pdev);
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return ret;
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}
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static void dw_mci_pci_remove(struct pci_dev *pdev)
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{
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struct dw_mci *host = pci_get_drvdata(pdev);
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dw_mci_remove(host);
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pci_set_drvdata(pdev, NULL);
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pci_release_regions(pdev);
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pci_iounmap(pdev, host->regs);
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kfree(host);
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pci_disable_device(pdev);
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}
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#ifdef CONFIG_PM_SLEEP
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static int dw_mci_pci_suspend(struct device *dev)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct dw_mci *host = pci_get_drvdata(pdev);
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return dw_mci_suspend(host);
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}
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static int dw_mci_pci_resume(struct device *dev)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct dw_mci *host = pci_get_drvdata(pdev);
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return dw_mci_resume(host);
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}
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#else
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#define dw_mci_pci_suspend NULL
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#define dw_mci_pci_resume NULL
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#endif /* CONFIG_PM_SLEEP */
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static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);
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static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
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{ PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
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{}
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};
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MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
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static struct pci_driver dw_mci_pci_driver = {
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.name = "dw_mmc_pci",
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.id_table = dw_mci_pci_id,
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.probe = dw_mci_pci_probe,
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.remove = dw_mci_pci_remove,
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.driver = {
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.pm = &dw_mci_pci_pmops
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},
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};
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module_pci_driver(dw_mci_pci_driver);
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MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
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MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
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MODULE_LICENSE("GPL v2");
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