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![Leon Romanovsky](/assets/img/avatar_default.png)
MODULE_SUPPORTED_DEVICE was added in pre-git era and never was implemented. We can safely remove it, because the kernel has grown to have many more reliable mechanisms to determine if device is supported or not. Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
384 lines
9.3 KiB
C
384 lines
9.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2008 Per Dalen <per.dalen@cnw.se>
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*
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* Parts of this software are based on (derived) the following:
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*
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* - Kvaser linux driver, version 4.72 BETA
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* Copyright (C) 2002-2007 KVASER AB
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*
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* - Lincan driver, version 0.3.3, OCERA project
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* Copyright (C) 2004 Pavel Pisa
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* Copyright (C) 2001 Arnaud Westenberg
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*
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* - Socketcan SJA1000 drivers
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* Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
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* 38106 Braunschweig, GERMANY
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/can/dev.h>
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#include <linux/io.h>
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#include "sja1000.h"
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#define DRV_NAME "kvaser_pci"
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MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
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MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
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MODULE_LICENSE("GPL v2");
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#define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */
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struct kvaser_pci {
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int channel;
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struct pci_dev *pci_dev;
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struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
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void __iomem *conf_addr;
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void __iomem *res_addr;
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int no_channels;
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u8 xilinx_ver;
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};
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#define KVASER_PCI_CAN_CLOCK (16000000 / 2)
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/*
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* The board configuration is probably following:
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* RX1 is connected to ground.
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* TX1 is not connected.
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* CLKO is not connected.
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* Setting the OCR register to 0xDA is a good idea.
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* This means normal output mode , push-pull and the correct polarity.
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*/
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#define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
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/*
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* In the CDR register, you should set CBP to 1.
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* You will probably also want to set the clock divider value to 0
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* (meaning divide-by-2), the Pelican bit, and the clock-off bit
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* (you will have no need for CLKOUT anyway).
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*/
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#define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
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/*
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* These register values are valid for revision 14 of the Xilinx logic.
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*/
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#define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
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high nibble version number. */
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#define XILINX_PRESUMED_VERSION 14
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/*
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* Important S5920 registers
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*/
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#define S5920_INTCSR 0x38
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#define S5920_PTCR 0x60
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#define INTCSR_ADDON_INTENABLE_M 0x2000
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#define KVASER_PCI_PORT_BYTES 0x20
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#define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
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#define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
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#define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */
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#define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
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#define KVASER_PCI_DEVICE_ID1 0x8406
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#define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
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#define KVASER_PCI_DEVICE_ID2 0x0008
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static const struct pci_device_id kvaser_pci_tbl[] = {
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{KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
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{KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
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{ 0,}
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};
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MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
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static u8 kvaser_pci_read_reg(const struct sja1000_priv *priv, int port)
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{
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return ioread8(priv->reg_base + port);
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}
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static void kvaser_pci_write_reg(const struct sja1000_priv *priv,
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int port, u8 val)
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{
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iowrite8(val, priv->reg_base + port);
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}
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static void kvaser_pci_disable_irq(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct kvaser_pci *board = priv->priv;
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u32 intcsr;
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/* Disable interrupts from card */
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intcsr = ioread32(board->conf_addr + S5920_INTCSR);
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intcsr &= ~INTCSR_ADDON_INTENABLE_M;
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iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
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}
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static void kvaser_pci_enable_irq(struct net_device *dev)
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{
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struct sja1000_priv *priv = netdev_priv(dev);
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struct kvaser_pci *board = priv->priv;
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u32 tmp_en_io;
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/* Enable interrupts from card */
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tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
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tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
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iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
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}
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static int number_of_sja1000_chip(void __iomem *base_addr)
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{
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u8 status;
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int i;
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for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
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/* reset chip */
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iowrite8(MOD_RM, base_addr +
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(i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
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status = ioread8(base_addr +
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(i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
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/* check reset bit */
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if (!(status & MOD_RM))
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break;
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}
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return i;
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}
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static void kvaser_pci_del_chan(struct net_device *dev)
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{
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struct sja1000_priv *priv;
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struct kvaser_pci *board;
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int i;
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if (!dev)
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return;
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priv = netdev_priv(dev);
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board = priv->priv;
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if (!board)
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return;
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dev_info(&board->pci_dev->dev, "Removing device %s\n",
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dev->name);
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/* Disable PCI interrupts */
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kvaser_pci_disable_irq(dev);
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for (i = 0; i < board->no_channels - 1; i++) {
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if (board->slave_dev[i]) {
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dev_info(&board->pci_dev->dev, "Removing device %s\n",
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board->slave_dev[i]->name);
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unregister_sja1000dev(board->slave_dev[i]);
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free_sja1000dev(board->slave_dev[i]);
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}
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}
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unregister_sja1000dev(dev);
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pci_iounmap(board->pci_dev, priv->reg_base);
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pci_iounmap(board->pci_dev, board->conf_addr);
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pci_iounmap(board->pci_dev, board->res_addr);
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free_sja1000dev(dev);
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}
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static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
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struct net_device **master_dev,
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void __iomem *conf_addr,
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void __iomem *res_addr,
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void __iomem *base_addr)
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{
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struct net_device *dev;
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struct sja1000_priv *priv;
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struct kvaser_pci *board;
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int err;
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dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
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if (dev == NULL)
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return -ENOMEM;
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priv = netdev_priv(dev);
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board = priv->priv;
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board->pci_dev = pdev;
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board->channel = channel;
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/* S5920 */
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board->conf_addr = conf_addr;
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/* XILINX board wide address */
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board->res_addr = res_addr;
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if (channel == 0) {
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board->xilinx_ver =
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ioread8(board->res_addr + XILINX_VERINT) >> 4;
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/* Assert PTADR# - we're in passive mode so the other bits are
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not important */
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iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
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/* Enable interrupts from card */
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kvaser_pci_enable_irq(dev);
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} else {
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struct sja1000_priv *master_priv = netdev_priv(*master_dev);
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struct kvaser_pci *master_board = master_priv->priv;
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master_board->slave_dev[channel - 1] = dev;
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master_board->no_channels = channel + 1;
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board->xilinx_ver = master_board->xilinx_ver;
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}
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priv->reg_base = base_addr + channel * KVASER_PCI_PORT_BYTES;
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priv->read_reg = kvaser_pci_read_reg;
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priv->write_reg = kvaser_pci_write_reg;
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priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
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priv->ocr = KVASER_PCI_OCR;
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priv->cdr = KVASER_PCI_CDR;
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priv->irq_flags = IRQF_SHARED;
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dev->irq = pdev->irq;
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dev_info(&pdev->dev, "reg_base=%p conf_addr=%p irq=%d\n",
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priv->reg_base, board->conf_addr, dev->irq);
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SET_NETDEV_DEV(dev, &pdev->dev);
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dev->dev_id = channel;
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/* Register SJA1000 device */
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err = register_sja1000dev(dev);
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if (err) {
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dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
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err);
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goto failure;
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}
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if (channel == 0)
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*master_dev = dev;
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return 0;
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failure:
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kvaser_pci_del_chan(dev);
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return err;
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}
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static int kvaser_pci_init_one(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int err;
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struct net_device *master_dev = NULL;
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struct sja1000_priv *priv;
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struct kvaser_pci *board;
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int no_channels;
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void __iomem *base_addr = NULL;
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void __iomem *conf_addr = NULL;
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void __iomem *res_addr = NULL;
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int i;
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dev_info(&pdev->dev, "initializing device %04x:%04x\n",
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pdev->vendor, pdev->device);
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err = pci_enable_device(pdev);
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if (err)
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goto failure;
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err = pci_request_regions(pdev, DRV_NAME);
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if (err)
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goto failure_release_pci;
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/* S5920 */
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conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
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if (conf_addr == NULL) {
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err = -ENODEV;
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goto failure_release_regions;
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}
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/* XILINX board wide address */
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res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
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if (res_addr == NULL) {
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err = -ENOMEM;
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goto failure_iounmap;
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}
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base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
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if (base_addr == NULL) {
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err = -ENOMEM;
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goto failure_iounmap;
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}
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no_channels = number_of_sja1000_chip(base_addr);
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if (no_channels == 0) {
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err = -ENOMEM;
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goto failure_iounmap;
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}
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for (i = 0; i < no_channels; i++) {
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err = kvaser_pci_add_chan(pdev, i, &master_dev,
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conf_addr, res_addr,
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base_addr);
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if (err)
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goto failure_cleanup;
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}
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priv = netdev_priv(master_dev);
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board = priv->priv;
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dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
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board->xilinx_ver, board->no_channels);
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pci_set_drvdata(pdev, master_dev);
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return 0;
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failure_cleanup:
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kvaser_pci_del_chan(master_dev);
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failure_iounmap:
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if (conf_addr != NULL)
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pci_iounmap(pdev, conf_addr);
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if (res_addr != NULL)
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pci_iounmap(pdev, res_addr);
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if (base_addr != NULL)
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pci_iounmap(pdev, base_addr);
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failure_release_regions:
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pci_release_regions(pdev);
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failure_release_pci:
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pci_disable_device(pdev);
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failure:
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return err;
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}
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static void kvaser_pci_remove_one(struct pci_dev *pdev)
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{
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struct net_device *dev = pci_get_drvdata(pdev);
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kvaser_pci_del_chan(dev);
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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}
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static struct pci_driver kvaser_pci_driver = {
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.name = DRV_NAME,
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.id_table = kvaser_pci_tbl,
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.probe = kvaser_pci_init_one,
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.remove = kvaser_pci_remove_one,
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};
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module_pci_driver(kvaser_pci_driver);
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