1 /* 2 * Synopsys DesignWare Multimedia Card PCI Interface driver 3 * 4 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/interrupt.h> 13 #include <linux/module.h> 14 #include <linux/io.h> 15 #include <linux/irq.h> 16 #include <linux/pci.h> 17 #include <linux/slab.h> 18 #include <linux/mmc/host.h> 19 #include <linux/mmc/mmc.h> 20 #include <linux/mmc/dw_mmc.h> 21 #include "dw_mmc.h" 22 23 #define PCI_BAR_NO 2 24 #define COMPLETE_BAR 0 25 #define SYNOPSYS_DW_MCI_VENDOR_ID 0x700 26 #define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107 27 /* Defining the Capabilities */ 28 #define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\ 29 MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\ 30 MMC_CAP_SDIO_IRQ) 31 32 static struct dw_mci_board pci_board_data = { 33 .num_slots = 1, 34 .caps = DW_MCI_CAPABILITIES, 35 .bus_hz = 33 * 1000 * 1000, 36 .detect_delay_ms = 200, 37 .fifo_depth = 32, 38 }; 39 40 static int __devinit dw_mci_pci_probe(struct pci_dev *pdev, 41 const struct pci_device_id *entries) 42 { 43 struct dw_mci *host; 44 int ret; 45 46 ret = pci_enable_device(pdev); 47 if (ret) 48 return ret; 49 if (pci_request_regions(pdev, "dw_mmc_pci")) { 50 ret = -ENODEV; 51 goto err_disable_dev; 52 } 53 54 host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL); 55 if (!host) { 56 ret = -ENOMEM; 57 goto err_release; 58 } 59 60 host->irq = pdev->irq; 61 host->irq_flags = IRQF_SHARED; 62 host->dev = &pdev->dev; 63 host->pdata = &pci_board_data; 64 65 host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR); 66 if (!host->regs) { 67 ret = -EIO; 68 goto err_unmap; 69 } 70 71 pci_set_drvdata(pdev, host); 72 ret = dw_mci_probe(host); 73 if (ret) 74 goto err_probe_failed; 75 return ret; 76 77 err_probe_failed: 78 pci_iounmap(pdev, host->regs); 79 err_unmap: 80 kfree(host); 81 err_release: 82 pci_release_regions(pdev); 83 err_disable_dev: 84 pci_disable_device(pdev); 85 return ret; 86 } 87 88 static void __devexit dw_mci_pci_remove(struct pci_dev *pdev) 89 { 90 struct dw_mci *host = pci_get_drvdata(pdev); 91 92 dw_mci_remove(host); 93 pci_set_drvdata(pdev, NULL); 94 pci_release_regions(pdev); 95 pci_iounmap(pdev, host->regs); 96 kfree(host); 97 pci_disable_device(pdev); 98 } 99 100 #ifdef CONFIG_PM_SLEEP 101 static int dw_mci_pci_suspend(struct device *dev) 102 { 103 int ret; 104 struct pci_dev *pdev = to_pci_dev(dev); 105 struct dw_mci *host = pci_get_drvdata(pdev); 106 107 ret = dw_mci_suspend(host); 108 return ret; 109 } 110 111 static int dw_mci_pci_resume(struct device *dev) 112 { 113 int ret; 114 struct pci_dev *pdev = to_pci_dev(dev); 115 struct dw_mci *host = pci_get_drvdata(pdev); 116 117 ret = dw_mci_resume(host); 118 return ret; 119 } 120 #else 121 #define dw_mci_pci_suspend NULL 122 #define dw_mci_pci_resume NULL 123 #endif /* CONFIG_PM_SLEEP */ 124 125 static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume); 126 127 static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = { 128 { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) }, 129 {} 130 }; 131 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id); 132 133 static struct pci_driver dw_mci_pci_driver = { 134 .name = "dw_mmc_pci", 135 .id_table = dw_mci_pci_id, 136 .probe = dw_mci_pci_probe, 137 .remove = dw_mci_pci_remove, 138 .driver = { 139 .pm = &dw_mci_pci_pmops 140 }, 141 }; 142 143 module_pci_driver(dw_mci_pci_driver); 144 145 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver"); 146 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>"); 147 MODULE_LICENSE("GPL v2"); 148