diff options
Diffstat (limited to 'drivers/media/pci/ddbridge/ddbridge-main.c')
| -rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-main.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-main.c b/drivers/media/pci/ddbridge/ddbridge-main.c new file mode 100644 index 000000000..03dc9924f --- /dev/null +++ b/drivers/media/pci/ddbridge/ddbridge-main.c @@ -0,0 +1,322 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ddbridge.c: Digital Devices PCIe bridge driver + * + * Copyright (C) 2010-2017 Digital Devices GmbH + * Ralph Metzler <rjkm@metzlerbros.de> + * Marcus Metzler <mocm@metzlerbros.de> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 only, 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/poll.h> +#include <linux/io.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/timer.h> +#include <linux/i2c.h> +#include <linux/swab.h> +#include <linux/vmalloc.h> + +#include "ddbridge.h" +#include "ddbridge-i2c.h" +#include "ddbridge-regs.h" +#include "ddbridge-hw.h" +#include "ddbridge-io.h" + +/****************************************************************************/ +/* module parameters */ + +#ifdef CONFIG_PCI_MSI +#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE +static int msi = 1; +#else +static int msi; +#endif +module_param(msi, int, 0444); +#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE +MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable, 1-enable (default)"); +#else +MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable (default), 1-enable"); +#endif +#endif + +/****************************************************************************/ +/****************************************************************************/ +/****************************************************************************/ + +static void ddb_irq_disable(struct ddb *dev) +{ + ddbwritel(dev, 0, INTERRUPT_ENABLE); + ddbwritel(dev, 0, MSI1_ENABLE); +} + +static void ddb_msi_exit(struct ddb *dev) +{ +#ifdef CONFIG_PCI_MSI + if (dev->msi) + pci_free_irq_vectors(dev->pdev); +#endif +} + +static void ddb_irq_exit(struct ddb *dev) +{ + ddb_irq_disable(dev); + if (dev->msi == 2) + free_irq(pci_irq_vector(dev->pdev, 1), dev); + free_irq(pci_irq_vector(dev->pdev, 0), dev); +} + +static void ddb_remove(struct pci_dev *pdev) +{ + struct ddb *dev = (struct ddb *)pci_get_drvdata(pdev); + + ddb_device_destroy(dev); + ddb_ports_detach(dev); + ddb_i2c_release(dev); + + ddb_irq_exit(dev); + ddb_msi_exit(dev); + ddb_ports_release(dev); + ddb_buffers_free(dev); + + ddb_unmap(dev); + pci_set_drvdata(pdev, NULL); + pci_disable_device(pdev); +} + +#ifdef CONFIG_PCI_MSI +static void ddb_irq_msi(struct ddb *dev, int nr) +{ + int stat; + + if (msi && pci_msi_enabled()) { + stat = pci_alloc_irq_vectors(dev->pdev, 1, nr, + PCI_IRQ_MSI | PCI_IRQ_MSIX); + if (stat >= 1) { + dev->msi = stat; + dev_info(dev->dev, "using %d MSI interrupt(s)\n", + dev->msi); + } else { + dev_info(dev->dev, "MSI not available.\n"); + } + } +} +#endif + +static int ddb_irq_init(struct ddb *dev) +{ + int stat; + int irq_flag = IRQF_SHARED; + + ddbwritel(dev, 0x00000000, INTERRUPT_ENABLE); + ddbwritel(dev, 0x00000000, MSI1_ENABLE); + ddbwritel(dev, 0x00000000, MSI2_ENABLE); + ddbwritel(dev, 0x00000000, MSI3_ENABLE); + ddbwritel(dev, 0x00000000, MSI4_ENABLE); + ddbwritel(dev, 0x00000000, MSI5_ENABLE); + ddbwritel(dev, 0x00000000, MSI6_ENABLE); + ddbwritel(dev, 0x00000000, MSI7_ENABLE); + +#ifdef CONFIG_PCI_MSI + ddb_irq_msi(dev, 2); + + if (dev->msi) + irq_flag = 0; + if (dev->msi == 2) { + stat = request_irq(pci_irq_vector(dev->pdev, 0), + ddb_irq_handler0, irq_flag, "ddbridge", + (void *)dev); + if (stat < 0) + return stat; + stat = request_irq(pci_irq_vector(dev->pdev, 1), + ddb_irq_handler1, irq_flag, "ddbridge", + (void *)dev); + if (stat < 0) { + free_irq(pci_irq_vector(dev->pdev, 0), dev); + return stat; + } + } else +#endif + { + stat = request_irq(pci_irq_vector(dev->pdev, 0), + ddb_irq_handler, irq_flag, "ddbridge", + (void *)dev); + if (stat < 0) + return stat; + } + if (dev->msi == 2) { + ddbwritel(dev, 0x0fffff00, INTERRUPT_ENABLE); + ddbwritel(dev, 0x0000000f, MSI1_ENABLE); + } else { + ddbwritel(dev, 0x0fffff0f, INTERRUPT_ENABLE); + ddbwritel(dev, 0x00000000, MSI1_ENABLE); + } + return stat; +} + +static int ddb_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct ddb *dev; + int stat = 0; + + if (pci_enable_device(pdev) < 0) + return -ENODEV; + + pci_set_master(pdev); + + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) + return -ENODEV; + + dev = vzalloc(sizeof(*dev)); + if (!dev) + return -ENOMEM; + + mutex_init(&dev->mutex); + dev->has_dma = 1; + dev->pdev = pdev; + dev->dev = &pdev->dev; + pci_set_drvdata(pdev, dev); + + dev->link[0].ids.vendor = id->vendor; + dev->link[0].ids.device = id->device; + dev->link[0].ids.subvendor = id->subvendor; + dev->link[0].ids.subdevice = pdev->subsystem_device; + dev->link[0].ids.devid = (id->device << 16) | id->vendor; + + dev->link[0].dev = dev; + dev->link[0].info = get_ddb_info(id->vendor, id->device, + id->subvendor, pdev->subsystem_device); + + dev_info(&pdev->dev, "detected %s\n", dev->link[0].info->name); + + dev->regs_len = pci_resource_len(dev->pdev, 0); + dev->regs = ioremap(pci_resource_start(dev->pdev, 0), + pci_resource_len(dev->pdev, 0)); + + if (!dev->regs) { + dev_err(&pdev->dev, "not enough memory for register map\n"); + stat = -ENOMEM; + goto fail; + } + if (ddbreadl(dev, 0) == 0xffffffff) { + dev_err(&pdev->dev, "cannot read registers\n"); + stat = -ENODEV; + goto fail; + } + + dev->link[0].ids.hwid = ddbreadl(dev, 0); + dev->link[0].ids.regmapid = ddbreadl(dev, 4); + + dev_info(&pdev->dev, "HW %08x REGMAP %08x\n", + dev->link[0].ids.hwid, dev->link[0].ids.regmapid); + + ddbwritel(dev, 0, DMA_BASE_READ); + ddbwritel(dev, 0, DMA_BASE_WRITE); + + stat = ddb_irq_init(dev); + if (stat < 0) + goto fail0; + + if (ddb_init(dev) == 0) + return 0; + + ddb_irq_exit(dev); +fail0: + dev_err(&pdev->dev, "fail0\n"); + ddb_msi_exit(dev); +fail: + dev_err(&pdev->dev, "fail\n"); + + ddb_unmap(dev); + pci_set_drvdata(pdev, NULL); + pci_disable_device(pdev); + return -1; +} + +/****************************************************************************/ +/****************************************************************************/ +/****************************************************************************/ + +#define DDB_DEVICE_ANY(_device) \ + { PCI_DEVICE_SUB(DDVID, _device, DDVID, PCI_ANY_ID) } + +static const struct pci_device_id ddb_id_table[] = { + DDB_DEVICE_ANY(0x0002), + DDB_DEVICE_ANY(0x0003), + DDB_DEVICE_ANY(0x0005), + DDB_DEVICE_ANY(0x0006), + DDB_DEVICE_ANY(0x0007), + DDB_DEVICE_ANY(0x0008), + DDB_DEVICE_ANY(0x0009), + DDB_DEVICE_ANY(0x0011), + DDB_DEVICE_ANY(0x0012), + DDB_DEVICE_ANY(0x0013), + DDB_DEVICE_ANY(0x0201), + DDB_DEVICE_ANY(0x0203), + DDB_DEVICE_ANY(0x0210), + DDB_DEVICE_ANY(0x0220), + DDB_DEVICE_ANY(0x0320), + DDB_DEVICE_ANY(0x0321), + DDB_DEVICE_ANY(0x0322), + DDB_DEVICE_ANY(0x0323), + DDB_DEVICE_ANY(0x0328), + DDB_DEVICE_ANY(0x0329), + {0} +}; + +MODULE_DEVICE_TABLE(pci, ddb_id_table); + +static struct pci_driver ddb_pci_driver = { + .name = "ddbridge", + .id_table = ddb_id_table, + .probe = ddb_probe, + .remove = ddb_remove, +}; + +static __init int module_init_ddbridge(void) +{ + int stat; + + pr_info("Digital Devices PCIE bridge driver " + DDBRIDGE_VERSION + ", Copyright (C) 2010-17 Digital Devices GmbH\n"); + stat = ddb_init_ddbridge(); + if (stat < 0) + return stat; + stat = pci_register_driver(&ddb_pci_driver); + if (stat < 0) + ddb_exit_ddbridge(0, stat); + + return stat; +} + +static __exit void module_exit_ddbridge(void) +{ + pci_unregister_driver(&ddb_pci_driver); + ddb_exit_ddbridge(0, 0); +} + +module_init(module_init_ddbridge); +module_exit(module_exit_ddbridge); + +MODULE_DESCRIPTION("Digital Devices PCIe Bridge"); +MODULE_AUTHOR("Ralph and Marcus Metzler, Metzler Brothers Systementwicklung GbR"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DDBRIDGE_VERSION); |