From patchwork Tue Sep 1 15:37:33 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfgang Grandegger X-Patchwork-Id: 32755 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@bilbo.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 2DB85B7B96 for ; Wed, 2 Sep 2009 01:38:51 +1000 (EST) Received: by ozlabs.org (Postfix) id 20F47DDD0B; Wed, 2 Sep 2009 01:38:51 +1000 (EST) Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by ozlabs.org (Postfix) with ESMTP id A4930DDD01 for ; Wed, 2 Sep 2009 01:38:50 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754794AbZIAPhh (ORCPT ); Tue, 1 Sep 2009 11:37:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754779AbZIAPhg (ORCPT ); Tue, 1 Sep 2009 11:37:36 -0400 Received: from mail-out.m-online.net ([212.18.0.9]:39098 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754772AbZIAPhe (ORCPT ); Tue, 1 Sep 2009 11:37:34 -0400 Received: from mail01.m-online.net (mail.m-online.net [192.168.3.149]) by mail-out.m-online.net (Postfix) with ESMTP id 7BAC71C1531B; Tue, 1 Sep 2009 17:37:35 +0200 (CEST) X-Auth-Info: EQQzfdLDHi7Yhx0UUI2sKrPu/G8fsAPZtSusHVA9anM= Received: from lancy.denx.de (p4FF06838.dip.t-dialin.net [79.240.104.56]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp-auth.mnet-online.de (Postfix) with ESMTP id C1F0A90266; Tue, 1 Sep 2009 17:37:34 +0200 (CEST) Message-ID: <4A9D3FBD.1050702@grandegger.com> Date: Tue, 01 Sep 2009 17:37:33 +0200 From: Wolfgang Grandegger User-Agent: Thunderbird 2.0.0.21 (X11/20090320) MIME-Version: 1.0 To: Linux Netdev List CC: SocketCAN Core Mailing List , Oliver Hartkopp Subject: [PATCH net-next] can: sja1000: legacy SJA1000 ISA bus driver X-Enigmail-Version: 0.96.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds support for legacy SJA1000 CAN controllers on the ISA or PC-104 bus. The I/O port or memory address and the IRQ number must be specified via module parameters: insmod sja1000_isa.ko port=0x310,0x380 irq=7,11 for ISA devices using I/O ports or: insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11 for memory mapped ISA devices. Indirect access via address and data port is supported as well: insmod sja1000_isa.ko port=0x310,0x380 indirect=1 irq=7,11 Here is a full list of the supported module parameters: port:I/O port number (array of ulong) mem:I/O memory address (array of ulong) indirect:Indirect access via address and data port (array of byte) irq:IRQ number (array of int) clk:External oscillator clock frequency (default=16000000 [16 MHz]) (array of int) cdr:Clock divider register (default=0x48 [CDR_CBP | CDR_CLK_OFF]) (array of byte) ocr:Output clock register (default=0x18 [OCR_TX0_PUSHPULL]) (array of byte) Note: for clk, cdr, ocr, the first argument re-defines the default for all other devices, e.g.: insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000 is equivalent to insmod sja1000_isa.ko mem=0xd1000,0xd1000 irq=7,11 \ clk=24000000,24000000 Signed-off-by: Wolfgang Grandegger Tested-by: Oliver Hartkopp --- drivers/net/can/Kconfig | 7 drivers/net/can/sja1000/Makefile | 1 drivers/net/can/sja1000/sja1000_isa.c | 281 ++++++++++++++++++++++++++++++++++ 3 files changed, 289 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: net-next-2.6/drivers/net/can/sja1000/sja1000_isa.c =================================================================== --- /dev/null +++ net-next-2.6/drivers/net/can/sja1000/sja1000_isa.c @@ -0,0 +1,281 @@ +/* + * Copyright (C) 2009 Wolfgang Grandegger + * + * 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 +#include + +#include "sja1000.h" + +#define DRV_NAME "sja1000_isa" + +#define MAXDEV 8 + +MODULE_AUTHOR("Wolfgang Grandegger "); +MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the ISA bus"); +MODULE_LICENSE("GPL v2"); + +#define CLK_DEFAULT 16000000 /* 16 MHz */ +#define CDR_DEFAULT (CDR_CBP | CDR_CLK_OFF) +#define OCR_DEFAULT OCR_TX0_PUSHPULL + +static unsigned long port[MAXDEV]; +static unsigned long mem[MAXDEV]; +static int __devinitdata irq[MAXDEV]; +static int __devinitdata clk[MAXDEV]; +static char __devinitdata cdr[MAXDEV] = {[0 ... (MAXDEV - 1)] = -1}; +static char __devinitdata ocr[MAXDEV] = {[0 ... (MAXDEV - 1)] = -1}; +static char __devinitdata indirect[MAXDEV] = {[0 ... (MAXDEV - 1)] = -1}; + +module_param_array(port, ulong, NULL, S_IRUGO); +MODULE_PARM_DESC(port, "I/O port number"); + +module_param_array(mem, ulong, NULL, S_IRUGO); +MODULE_PARM_DESC(mem, "I/O memory address"); + +module_param_array(indirect, byte, NULL, S_IRUGO); +MODULE_PARM_DESC(indirect, "Indirect access via address and data port"); + +module_param_array(irq, int, NULL, S_IRUGO); +MODULE_PARM_DESC(irq, "IRQ number"); + +module_param_array(clk, int, NULL, S_IRUGO); +MODULE_PARM_DESC(clk, "External oscillator clock frequency " + "(default=16000000 [16 MHz])"); + +module_param_array(cdr, byte, NULL, S_IRUGO); +MODULE_PARM_DESC(cdr, "Clock divider register " + "(default=0x48 [CDR_CBP | CDR_CLK_OFF])"); + +module_param_array(ocr, byte, NULL, S_IRUGO); +MODULE_PARM_DESC(ocr, "Output control register " + "(default=0x18 [OCR_TX0_PUSHPULL])"); + +#define SJA1000_IOSIZE 0x20 +#define SJA1000_IOSIZE_INDIRECT 0x02 + +static u8 sja1000_isa_mem_read_reg(const struct sja1000_priv *priv, int reg) +{ + return readb(priv->reg_base + reg); +} + +static void sja1000_isa_mem_write_reg(const struct sja1000_priv *priv, + int reg, u8 val) +{ + writeb(val, priv->reg_base + reg); +} + +static u8 sja1000_isa_port_read_reg(const struct sja1000_priv *priv, int reg) +{ + return inb((unsigned long)priv->reg_base + reg); +} + +static void sja1000_isa_port_write_reg(const struct sja1000_priv *priv, + int reg, u8 val) +{ + outb(val, (unsigned long)priv->reg_base + reg); +} + +static u8 sja1000_isa_port_read_reg_indirect(const struct sja1000_priv *priv, + int reg) +{ + unsigned long base = (unsigned long)priv->reg_base; + + outb(reg, base); + return inb(base + 1); +} + +static void sja1000_isa_port_write_reg_indirect(const struct sja1000_priv *priv, + int reg, u8 val) +{ + unsigned long base = (unsigned long)priv->reg_base; + + outb(reg, base); + outb(val, base + 1); +} + +static int __devinit sja1000_isa_match(struct device *pdev, unsigned int idx) +{ + if (port[idx] || mem[idx]) { + if (irq[idx]) + return 1; + } else if (idx) + return 0; + + dev_err(pdev, "insufficient parameters supplied\n"); + return 0; +} + +static int __devinit sja1000_isa_probe(struct device *pdev, unsigned int idx) +{ + struct net_device *dev; + struct sja1000_priv *priv; + void __iomem *base = NULL; + int iosize = SJA1000_IOSIZE; + int err; + + if (mem[idx]) { + if (!request_mem_region(mem[idx], iosize, DRV_NAME)) { + err = -EBUSY; + goto exit; + } + base = ioremap_nocache(mem[idx], iosize); + if (!base) { + err = -ENOMEM; + goto exit_release; + } + } else { + if (indirect[idx] > 0 || + (indirect[idx] == -1 && indirect[0] > 0)) + iosize = SJA1000_IOSIZE_INDIRECT; + if (!request_region(port[idx], iosize, DRV_NAME)) { + err = -EBUSY; + goto exit; + } + } + + dev = alloc_sja1000dev(0); + if (!dev) { + err = -ENOMEM; + goto exit_unmap; + } + priv = netdev_priv(dev); + + dev->irq = irq[idx]; + priv->irq_flags = IRQF_SHARED; + if (mem[idx]) { + priv->reg_base = base; + dev->base_addr = mem[idx]; + priv->read_reg = sja1000_isa_mem_read_reg; + priv->write_reg = sja1000_isa_mem_write_reg; + } else { + priv->reg_base = (void __iomem *)port[idx]; + dev->base_addr = port[idx]; + + if (iosize == SJA1000_IOSIZE_INDIRECT) { + priv->read_reg = sja1000_isa_port_read_reg_indirect; + priv->write_reg = sja1000_isa_port_write_reg_indirect; + } else { + priv->read_reg = sja1000_isa_port_read_reg; + priv->write_reg = sja1000_isa_port_write_reg; + } + } + + if (clk[idx]) + priv->can.clock.freq = clk[idx] / 2; + else if (clk[0]) + priv->can.clock.freq = clk[0] / 2; + else + priv->can.clock.freq = CLK_DEFAULT / 2; + + if (ocr[idx] != -1) + priv->ocr = ocr[idx] & 0xff; + else if (ocr[0] != -1) + priv->ocr = ocr[0] & 0xff; + else + priv->ocr = OCR_DEFAULT; + + if (cdr[idx] != -1) + priv->cdr = cdr[idx] & 0xff; + else if (cdr[0] != -1) + priv->cdr = cdr[0] & 0xff; + else + priv->cdr = CDR_DEFAULT; + + dev_set_drvdata(pdev, dev); + SET_NETDEV_DEV(dev, pdev); + + err = register_sja1000dev(dev); + if (err) { + dev_err(pdev, "registering %s failed (err=%d)\n", + DRV_NAME, err); + goto exit_unmap; + } + + dev_info(pdev, "%s device registered (reg_base=0x%p, irq=%d)\n", + DRV_NAME, priv->reg_base, dev->irq); + return 0; + + exit_unmap: + if (mem[idx]) + iounmap(base); + exit_release: + if (mem[idx]) + release_mem_region(mem[idx], iosize); + else + release_region(port[idx], iosize); + exit: + return err; +} + +static int __devexit sja1000_isa_remove(struct device *pdev, unsigned int idx) +{ + struct net_device *dev = dev_get_drvdata(pdev); + struct sja1000_priv *priv = netdev_priv(dev); + + unregister_sja1000dev(dev); + dev_set_drvdata(pdev, NULL); + + if (mem[idx]) { + iounmap(priv->reg_base); + release_mem_region(mem[idx], SJA1000_IOSIZE); + } else { + if (priv->read_reg == sja1000_isa_port_read_reg_indirect) + release_region(port[idx], SJA1000_IOSIZE_INDIRECT); + else + release_region(port[idx], SJA1000_IOSIZE); + } + free_sja1000dev(dev); + + return 0; +} + +static struct isa_driver sja1000_isa_driver = { + .match = sja1000_isa_match, + .probe = sja1000_isa_probe, + .remove = __devexit_p(sja1000_isa_remove), + .driver = { + .name = DRV_NAME, + }, +}; + +static int __init sja1000_isa_init(void) +{ + int err = isa_register_driver(&sja1000_isa_driver, MAXDEV); + + if (!err) + printk(KERN_INFO + "Legacy %s driver for max. %d devices registered\n", + DRV_NAME, MAXDEV); + return err; +} + +static void __exit sja1000_isa_exit(void) +{ + isa_unregister_driver(&sja1000_isa_driver); +} + +module_init(sja1000_isa_init); +module_exit(sja1000_isa_exit); Index: net-next-2.6/drivers/net/can/Kconfig =================================================================== --- net-next-2.6.orig/drivers/net/can/Kconfig +++ net-next-2.6/drivers/net/can/Kconfig @@ -41,6 +41,13 @@ config CAN_SJA1000 ---help--- Driver for the SJA1000 CAN controllers from Philips or NXP +config CAN_SJA1000_ISA + depends on CAN_SJA1000 && ISA + tristate "ISA Bus based legacy SJA1000 driver" + ---help--- + This driver adds legacy support for SJA1000 chips connected to + the ISA bus using I/O port, memory mapped or indirect access. + config CAN_SJA1000_PLATFORM depends on CAN_SJA1000 tristate "Generic Platform Bus based SJA1000 driver" Index: net-next-2.6/drivers/net/can/sja1000/Makefile =================================================================== --- net-next-2.6.orig/drivers/net/can/sja1000/Makefile +++ net-next-2.6/drivers/net/can/sja1000/Makefile @@ -3,6 +3,7 @@ # obj-$(CONFIG_CAN_SJA1000) += sja1000.o +obj-$(CONFIG_CAN_SJA1000_ISA) += sja1000_isa.o obj-$(CONFIG_CAN_SJA1000_PLATFORM) += sja1000_platform.o obj-$(CONFIG_CAN_SJA1000_OF_PLATFORM) += sja1000_of_platform.o obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o