/* * Copyright (C) 2008 Per Dalen * * Parts of this software are based on (derived) the following: * * - Kvaser linux driver, version 4.72 BETA * Copyright (C) 2002-2007 KVASER AB * * - Lincan driver, version 0.3.3, OCERA project * Copyright (C) 2004 Pavel Pisa * Copyright (C) 2001 Arnaud Westenberg * * - Socketcan SJA1000 drivers * Copyright (C) 2007 Wolfgang Grandegger * Copyright (c) 2002-2007 Volkswagen Group Electronic Research * Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33, * 38106 Braunschweig, GERMANY * * This program is free software; you can redistribute it and/or modify * it under the terms of the version 2 of the GNU General Public License * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include "sja1000.h" #define DRV_NAME "kvaser_pci" MODULE_AUTHOR("Per Dalen "); MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards"); MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card"); MODULE_LICENSE("GPL v2"); #define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */ struct kvaser_pci { int channel; struct pci_dev *pci_dev; struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1]; void __iomem *conf_addr; void __iomem *res_addr; int no_channels; u8 xilinx_ver; }; #define KVASER_PCI_CAN_CLOCK (16000000 / 2) /* * The board configuration is probably following: * RX1 is connected to ground. * TX1 is not connected. * CLKO is not connected. * Setting the OCR register to 0xDA is a good idea. * This means normal output mode , push-pull and the correct polarity. */ #define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL) /* * In the CDR register, you should set CBP to 1. * You will probably also want to set the clock divider value to 0 * (meaning divide-by-2), the Pelican bit, and the clock-off bit * (you will have no need for CLKOUT anyway). */ #define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK) /* * These register values are valid for revision 14 of the Xilinx logic. */ #define XILINX_VERINT 7 /* Lower nibble simulate interrupts, high nibble version number. */ #define XILINX_PRESUMED_VERSION 14 /* * Important S5920 registers */ #define S5920_INTCSR 0x38 #define S5920_PTCR 0x60 #define INTCSR_ADDON_INTENABLE_M 0x2000 #define KVASER_PCI_PORT_BYTES 0x20 #define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */ #define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */ #define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */ #define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */ #define KVASER_PCI_DEVICE_ID1 0x8406 #define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */ #define KVASER_PCI_DEVICE_ID2 0x0008 static struct pci_device_id kvaser_pci_tbl[] = { {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,}, {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,}, { 0,} }; MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl); static u8 kvaser_pci_read_reg(const struct net_device *dev, int port) { return ioread8((void __iomem *)(dev->base_addr + port)); } static void kvaser_pci_write_reg(const struct net_device *dev, int port, u8 val) { iowrite8(val, (void __iomem *)(dev->base_addr + port)); } static void kvaser_pci_disable_irq(struct net_device *dev) { struct sja1000_priv *priv = netdev_priv(dev); struct kvaser_pci *board = priv->priv; u32 intcsr; /* Disable interrupts from card */ intcsr = ioread32(board->conf_addr + S5920_INTCSR); intcsr &= ~INTCSR_ADDON_INTENABLE_M; iowrite32(intcsr, board->conf_addr + S5920_INTCSR); } static void kvaser_pci_enable_irq(struct net_device *dev) { struct sja1000_priv *priv = netdev_priv(dev); struct kvaser_pci *board = priv->priv; u32 tmp_en_io; /* Enable interrupts from card */ tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR); tmp_en_io |= INTCSR_ADDON_INTENABLE_M; iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR); } static int number_of_sja1000_chip(void __iomem *base_addr) { u8 status; int i; for (i = 0; i < MAX_NO_OF_CHANNELS; i++) { /* reset chip */ iowrite8(MOD_RM, base_addr + (i * KVASER_PCI_PORT_BYTES) + REG_MOD); status = ioread8(base_addr + (i * KVASER_PCI_PORT_BYTES) + REG_MOD); /* check reset bit */ if (!(status & MOD_RM)) break; } return i; } static void kvaser_pci_del_chan(struct net_device *dev) { struct sja1000_priv *priv; struct kvaser_pci *board; int i; if (!dev) return; priv = netdev_priv(dev); board = priv->priv; if (!board) return; dev_info(&board->pci_dev->dev, "Removing device %s\n", dev->name); /* Disable PCI interrupts */ kvaser_pci_disable_irq(dev); for (i = 0; i < board->no_channels - 1; i++) { if (board->slave_dev[i]) { dev_info(&board->pci_dev->dev, "Removing device %s\n", board->slave_dev[i]->name); unregister_sja1000dev(board->slave_dev[i]); free_sja1000dev(board->slave_dev[i]); } } unregister_sja1000dev(dev); pci_iounmap(board->pci_dev, (void __iomem *)dev->base_addr); pci_iounmap(board->pci_dev, board->conf_addr); pci_iounmap(board->pci_dev, board->res_addr); free_sja1000dev(dev); } static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel, struct net_device **master_dev, void __iomem *conf_addr, void __iomem *res_addr, unsigned long base_addr) { struct net_device *dev; struct sja1000_priv *priv; struct kvaser_pci *board; int err, init_step; dev = alloc_sja1000dev(sizeof(struct kvaser_pci)); if (dev == NULL) return -ENOMEM; priv = netdev_priv(dev); board = priv->priv; board->pci_dev = pdev; board->channel = channel; /* S5920 */ board->conf_addr = conf_addr; /* XILINX board wide address */ board->res_addr = res_addr; if (channel == 0) { board->xilinx_ver = ioread8(board->res_addr + XILINX_VERINT) >> 4; init_step = 2; /* Assert PTADR# - we're in passive mode so the other bits are not important */ iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR); /* Enable interrupts from card */ kvaser_pci_enable_irq(dev); } else { struct sja1000_priv *master_priv = netdev_priv(*master_dev); struct kvaser_pci *master_board = master_priv->priv; master_board->slave_dev[channel - 1] = dev; master_board->no_channels = channel + 1; board->xilinx_ver = master_board->xilinx_ver; } dev->base_addr = base_addr + channel * KVASER_PCI_PORT_BYTES; priv->read_reg = kvaser_pci_read_reg; priv->write_reg = kvaser_pci_write_reg; priv->can.clock.freq = KVASER_PCI_CAN_CLOCK; priv->ocr = KVASER_PCI_OCR; priv->cdr = KVASER_PCI_CDR; priv->irq_flags = IRQF_SHARED; dev->irq = pdev->irq; init_step = 4; dev_info(&pdev->dev, "base_addr=%#lx conf_addr=%p irq=%d\n", dev->base_addr, board->conf_addr, dev->irq); SET_NETDEV_DEV(dev, &pdev->dev); /* Register SJA1000 device */ err = register_sja1000dev(dev); if (err) { dev_err(&pdev->dev, "Registering device failed (err=%d)\n", err); goto failure; } if (channel == 0) *master_dev = dev; return 0; failure: kvaser_pci_del_chan(dev); return err; } static int __devinit kvaser_pci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int err; struct net_device *master_dev = NULL; struct sja1000_priv *priv; struct kvaser_pci *board; int no_channels; void __iomem *base_addr = NULL; void __iomem *conf_addr = NULL; void __iomem *res_addr = NULL; int i; dev_info(&pdev->dev, "initializing device %04x:%04x\n", pdev->vendor, pdev->device); err = pci_enable_device(pdev); if (err) goto failure; err = pci_request_regions(pdev, DRV_NAME); if (err) goto failure_release_pci; /* S5920 */ conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE); if (conf_addr == NULL) { err = -ENODEV; goto failure_release_regions; } /* XILINX board wide address */ res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE); if (res_addr == NULL) { err = -ENOMEM; goto failure_iounmap; } base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE); if (base_addr == NULL) { err = -ENOMEM; goto failure_iounmap; } no_channels = number_of_sja1000_chip(base_addr); if (no_channels == 0) { err = -ENOMEM; goto failure_iounmap; } for (i = 0; i < no_channels; i++) { err = kvaser_pci_add_chan(pdev, i, &master_dev, conf_addr, res_addr, (unsigned long)base_addr); if (err) goto failure_cleanup; } priv = netdev_priv(master_dev); board = priv->priv; dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n", board->xilinx_ver, board->no_channels); pci_set_drvdata(pdev, master_dev); return 0; failure_cleanup: kvaser_pci_del_chan(master_dev); failure_iounmap: if (conf_addr != NULL) pci_iounmap(pdev, conf_addr); if (res_addr != NULL) pci_iounmap(pdev, res_addr); if (base_addr != NULL) pci_iounmap(pdev, base_addr); failure_release_regions: pci_release_regions(pdev); failure_release_pci: pci_disable_device(pdev); failure: return err; } static void __devexit kvaser_pci_remove_one(struct pci_dev *pdev) { struct net_device *dev = pci_get_drvdata(pdev); kvaser_pci_del_chan(dev); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); } static struct pci_driver kvaser_pci_driver = { .name = DRV_NAME, .id_table = kvaser_pci_tbl, .probe = kvaser_pci_init_one, .remove = __devexit_p(kvaser_pci_remove_one), }; static int __init kvaser_pci_init(void) { return pci_register_driver(&kvaser_pci_driver); } static void __exit kvaser_pci_exit(void) { pci_unregister_driver(&kvaser_pci_driver); } module_init(kvaser_pci_init); module_exit(kvaser_pci_exit);