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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | // SPDX-License-Identifier: GPL-2.0-or-later /* Mantis PCI bridge driver Copyright (C) Manu Abraham (abraham.manu@gmail.com) */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <asm/io.h> #include <asm/page.h> #include <linux/kmod.h> #include <linux/vmalloc.h> #include <linux/init.h> #include <linux/device.h> #include <linux/pci.h> #include <asm/irq.h> #include <linux/signal.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <media/dmxdev.h> #include <media/dvbdev.h> #include <media/dvb_demux.h> #include <media/dvb_frontend.h> #include <media/dvb_net.h> #include "mantis_common.h" #include "mantis_reg.h" #include "mantis_pci.h" #define DRIVER_NAME "Mantis Core" int mantis_pci_init(struct mantis_pci *mantis) { u8 latency; struct mantis_hwconfig *config = mantis->hwconfig; struct pci_dev *pdev = mantis->pdev; int err, ret = 0; dprintk(MANTIS_ERROR, 0, "found a %s PCI %s device on (%02x:%02x.%x),\n", config->model_name, config->dev_type, mantis->pdev->bus->number, PCI_SLOT(mantis->pdev->devfn), PCI_FUNC(mantis->pdev->devfn)); err = pci_enable_device(pdev); if (err != 0) { ret = -ENODEV; dprintk(MANTIS_ERROR, 1, "ERROR: PCI enable failed <%i>", err); goto fail0; } err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); if (err != 0) { dprintk(MANTIS_ERROR, 1, "ERROR: Unable to obtain 32 bit DMA <%i>", err); ret = -ENOMEM; goto fail1; } pci_set_master(pdev); if (!request_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0), DRIVER_NAME)) { dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 Request failed !"); ret = -ENODEV; goto fail1; } mantis->mmio = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); if (!mantis->mmio) { dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 remap failed !"); ret = -ENODEV; goto fail2; } pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency); mantis->latency = latency; mantis->revision = pdev->revision; dprintk(MANTIS_ERROR, 0, " Mantis Rev %d [%04x:%04x], ", mantis->revision, mantis->pdev->subsystem_vendor, mantis->pdev->subsystem_device); dprintk(MANTIS_ERROR, 0, "irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n", mantis->pdev->irq, mantis->latency, mantis->mantis_addr, mantis->mmio); err = request_irq(pdev->irq, config->irq_handler, IRQF_SHARED, DRIVER_NAME, mantis); if (err != 0) { dprintk(MANTIS_ERROR, 1, "ERROR: IRQ registration failed ! <%d>", err); ret = -ENODEV; goto fail3; } pci_set_drvdata(pdev, mantis); return ret; /* Error conditions */ fail3: dprintk(MANTIS_ERROR, 1, "ERROR: <%d> I/O unmap", ret); if (mantis->mmio) iounmap(mantis->mmio); fail2: dprintk(MANTIS_ERROR, 1, "ERROR: <%d> releasing regions", ret); release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); fail1: dprintk(MANTIS_ERROR, 1, "ERROR: <%d> disabling device", ret); pci_disable_device(pdev); fail0: dprintk(MANTIS_ERROR, 1, "ERROR: <%d> exiting", ret); return ret; } EXPORT_SYMBOL_GPL(mantis_pci_init); void mantis_pci_exit(struct mantis_pci *mantis) { struct pci_dev *pdev = mantis->pdev; dprintk(MANTIS_NOTICE, 1, " mem: 0x%p", mantis->mmio); free_irq(pdev->irq, mantis); if (mantis->mmio) { iounmap(mantis->mmio); release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); } pci_disable_device(pdev); } EXPORT_SYMBOL_GPL(mantis_pci_exit); MODULE_DESCRIPTION("Mantis PCI DTV bridge driver"); MODULE_AUTHOR("Manu Abraham"); MODULE_LICENSE("GPL"); |