Merge tag 'linux-can-next-for-3.15-20140212' of git://gitorious.org/linux-can/linux-can-next

linux-can-next-for-3.15-20140212

Marc Kleine-Budde says:

====================
this is a pull request of eight patches for net-next/master.

Florian Vaussard contributed a series that merged the sja1000 of_platform
into the platform driver. The of_platform driver is finally removed.
Stephane Grosjean supplied a patch to allocate CANFD skbs. In a patch
by Uwe Kleine-König another missing copyright information was added to
a userspace header. And a patch by Yoann DI RUZZA that adds listen only
mode to the at91_can driver.
====================

Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/can/sja1000.txt

···
 
 Optional properties:
 
+- reg-io-width : Specify the size (in bytes) of the IO accesses that
+	should be performed on the device.  Valid value is 1, 2 or 4.
+	Default to 1 (8 bits).
+
 - nxp,external-clock-frequency : Frequency of the external oscillator
 	clock in Hz. Note that the internal clock frequency used by the
 	SJA1000 is half of that value. If not specified, a default value

drivers/net/can/at91_can.c

···
 	at91_transceiver_switch(priv, 1);
 
 	/* enable chip */
-	at91_write(priv, AT91_MR, AT91_MR_CANEN);
+	if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+		reg_mr = AT91_MR_CANEN | AT91_MR_ABM;
+	else
+		reg_mr = AT91_MR_CANEN;
+	at91_write(priv, AT91_MR, reg_mr);
 
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
 
···
 	priv->can.bittiming_const = &at91_bittiming_const;
 	priv->can.do_set_mode = at91_set_mode;
 	priv->can.do_get_berr_counter = at91_get_berr_counter;
-	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
+	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+		CAN_CTRLMODE_LISTENONLY;
 	priv->dev = dev;
 	priv->reg_base = addr;
 	priv->devtype_data = *devtype_data;

drivers/net/can/dev.c

···
 }
 EXPORT_SYMBOL_GPL(alloc_can_skb);
 
+struct sk_buff *alloc_canfd_skb(struct net_device *dev,
+				struct canfd_frame **cfd)
+{
+	struct sk_buff *skb;
+
+	skb = netdev_alloc_skb(dev, sizeof(struct can_skb_priv) +
+			       sizeof(struct canfd_frame));
+	if (unlikely(!skb))
+		return NULL;
+
+	skb->protocol = htons(ETH_P_CANFD);
+	skb->pkt_type = PACKET_BROADCAST;
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+	can_skb_reserve(skb);
+	can_skb_prv(skb)->ifindex = dev->ifindex;
+
+	*cfd = (struct canfd_frame *)skb_put(skb, sizeof(struct canfd_frame));
+	memset(*cfd, 0, sizeof(struct canfd_frame));
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(alloc_canfd_skb);
+
 struct sk_buff *alloc_can_err_skb(struct net_device *dev, struct can_frame **cf)
 {
 	struct sk_buff *skb;

drivers/net/can/sja1000/Kconfig

···
 	  the "platform bus" (Linux abstraction for directly to the
 	  processor attached devices).  Which can be found on various
 	  boards from Phytec (http://www.phytec.de) like the PCM027,
-	  PCM038.
-
-config CAN_SJA1000_OF_PLATFORM
-	tristate "Generic OF Platform Bus based SJA1000 driver"
-	depends on OF
-	---help---
-	  This driver adds support for the SJA1000 chips connected to
-	  the OpenFirmware "platform bus" found on embedded systems with
-	  OpenFirmware bindings, e.g. if you have a PowerPC based system
-	  you may want to enable this option.
+	  PCM038. It also provides the OpenFirmware "platform bus" found
+	  on embedded systems with OpenFirmware bindings, e.g. if you
+	  have a PowerPC based system you may want to enable this option.
 
 config CAN_EMS_PCMCIA
 	tristate "EMS CPC-CARD Card"

drivers/net/can/sja1000/Makefile

···
 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-$(CONFIG_CAN_EMS_PCMCIA) += ems_pcmcia.o
 obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
 obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o

drivers/net/can/sja1000/sja1000.c

···
 	struct sja1000_priv *priv = netdev_priv(dev);
 
 	if (priv->reg_base && sja1000_is_absent(priv)) {
-		printk(KERN_INFO "%s: probing @0x%lX failed\n",
-		       DRV_NAME, dev->base_addr);
+		netdev_err(dev, "probing failed\n");
 		return 0;
 	}
 	return -1;

drivers/net/can/sja1000/sja1000_of_platform.c

···
-/*
- * Driver for SJA1000 CAN controllers on the OpenFirmware platform bus
- *
- * Copyright (C) 2008-2009 Wolfgang Grandegger <[e-mail]>
- *
- * 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, see <http://www.gnu.org/licenses/>.
- */
-
-/* This is a generic driver for SJA1000 chips on the OpenFirmware platform
- * bus found on embedded PowerPC systems. You need a SJA1000 CAN node
- * definition in your flattened device tree source (DTS) file similar to:
- *
- *   can@3,100 {
- *           compatible = "nxp,sja1000";
- *           reg = <3 0x100 0x80>;
- *           interrupts = <2 0>;
- *           interrupt-parent = <&mpic>;
- *           nxp,external-clock-frequency = <16000000>;
- *   };
- *
- * See "Documentation/devicetree/bindings/net/can/sja1000.txt" for further
- * information.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/can/dev.h>
-
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#include "sja1000.h"
-
-#define DRV_NAME "sja1000_of_platform"
-
-MODULE_AUTHOR("Wolfgang Grandegger <[e-mail]>");
-MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the OF platform bus");
-MODULE_LICENSE("GPL v2");
-
-#define SJA1000_OFP_CAN_CLOCK  (16000000 / 2)
-
-#define SJA1000_OFP_OCR        OCR_TX0_PULLDOWN
-#define SJA1000_OFP_CDR        (CDR_CBP | CDR_CLK_OFF)
-
-static u8 sja1000_ofp_read_reg(const struct sja1000_priv *priv, int reg)
-{
-	return ioread8(priv->reg_base + reg);
-}
-
-static void sja1000_ofp_write_reg(const struct sja1000_priv *priv,
-				  int reg, u8 val)
-{
-	iowrite8(val, priv->reg_base + reg);
-}
-
-static int sja1000_ofp_remove(struct platform_device *ofdev)
-{
-	struct net_device *dev = platform_get_drvdata(ofdev);
-	struct sja1000_priv *priv = netdev_priv(dev);
-	struct device_node *np = ofdev->dev.of_node;
-	struct resource res;
-
-	unregister_sja1000dev(dev);
-	free_sja1000dev(dev);
-	iounmap(priv->reg_base);
-	irq_dispose_mapping(dev->irq);
-
-	of_address_to_resource(np, 0, &res);
-	release_mem_region(res.start, resource_size(&res));
-
-	return 0;
-}
-
-static int sja1000_ofp_probe(struct platform_device *ofdev)
-{
-	struct device_node *np = ofdev->dev.of_node;
-	struct net_device *dev;
-	struct sja1000_priv *priv;
-	struct resource res;
-	u32 prop;
-	int err, irq, res_size;
-	void __iomem *base;
-
-	err = of_address_to_resource(np, 0, &res);
-	if (err) {
-		dev_err(&ofdev->dev, "invalid address\n");
-		return err;
-	}
-
-	res_size = resource_size(&res);
-
-	if (!request_mem_region(res.start, res_size, DRV_NAME)) {
-		dev_err(&ofdev->dev, "couldn't request %pR\n", &res);
-		return -EBUSY;
-	}
-
-	base = ioremap_nocache(res.start, res_size);
-	if (!base) {
-		dev_err(&ofdev->dev, "couldn't ioremap %pR\n", &res);
-		err = -ENOMEM;
-		goto exit_release_mem;
-	}
-
-	irq = irq_of_parse_and_map(np, 0);
-	if (irq == 0) {
-		dev_err(&ofdev->dev, "no irq found\n");
-		err = -ENODEV;
-		goto exit_unmap_mem;
-	}
-
-	dev = alloc_sja1000dev(0);
-	if (!dev) {
-		err = -ENOMEM;
-		goto exit_dispose_irq;
-	}
-
-	priv = netdev_priv(dev);
-
-	priv->read_reg = sja1000_ofp_read_reg;
-	priv->write_reg = sja1000_ofp_write_reg;
-
-	err = of_property_read_u32(np, "nxp,external-clock-frequency", &prop);
-	if (!err)
-		priv->can.clock.freq = prop / 2;
-	else
-		priv->can.clock.freq = SJA1000_OFP_CAN_CLOCK; /* default */
-
-	err = of_property_read_u32(np, "nxp,tx-output-mode", &prop);
-	if (!err)
-		priv->ocr |= prop & OCR_MODE_MASK;
-	else
-		priv->ocr |= OCR_MODE_NORMAL; /* default */
-
-	err = of_property_read_u32(np, "nxp,tx-output-config", &prop);
-	if (!err)
-		priv->ocr |= (prop << OCR_TX_SHIFT) & OCR_TX_MASK;
-	else
-		priv->ocr |= OCR_TX0_PULLDOWN; /* default */
-
-	err = of_property_read_u32(np, "nxp,clock-out-frequency", &prop);
-	if (!err && prop) {
-		u32 divider = priv->can.clock.freq * 2 / prop;
-
-		if (divider > 1)
-			priv->cdr |= divider / 2 - 1;
-		else
-			priv->cdr |= CDR_CLKOUT_MASK;
-	} else {
-		priv->cdr |= CDR_CLK_OFF; /* default */
-	}
-
-	if (!of_property_read_bool(np, "nxp,no-comparator-bypass"))
-		priv->cdr |= CDR_CBP; /* default */
-
-	priv->irq_flags = IRQF_SHARED;
-	priv->reg_base = base;
-
-	dev->irq = irq;
-
-	dev_info(&ofdev->dev,
-		 "reg_base=0x%p irq=%d clock=%d ocr=0x%02x cdr=0x%02x\n",
-		 priv->reg_base, dev->irq, priv->can.clock.freq,
-		 priv->ocr, priv->cdr);
-
-	platform_set_drvdata(ofdev, dev);
-	SET_NETDEV_DEV(dev, &ofdev->dev);
-
-	err = register_sja1000dev(dev);
-	if (err) {
-		dev_err(&ofdev->dev, "registering %s failed (err=%d)\n",
-			DRV_NAME, err);
-		goto exit_free_sja1000;
-	}
-
-	return 0;
-
-exit_free_sja1000:
-	free_sja1000dev(dev);
-exit_dispose_irq:
-	irq_dispose_mapping(irq);
-exit_unmap_mem:
-	iounmap(base);
-exit_release_mem:
-	release_mem_region(res.start, res_size);
-
-	return err;
-}
-
-static struct of_device_id sja1000_ofp_table[] = {
-	{.compatible = "nxp,sja1000"},
-	{},
-};
-MODULE_DEVICE_TABLE(of, sja1000_ofp_table);
-
-static struct platform_driver sja1000_ofp_driver = {
-	.driver = {
-		.owner = THIS_MODULE,
-		.name = DRV_NAME,
-		.of_match_table = sja1000_ofp_table,
-	},
-	.probe = sja1000_ofp_probe,
-	.remove = sja1000_ofp_remove,
-};
-
-module_platform_driver(sja1000_ofp_driver);

drivers/net/can/sja1000/sja1000_platform.c

···
 #include <linux/can/dev.h>
 #include <linux/can/platform/sja1000.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
 
 #include "sja1000.h"
 
 #define DRV_NAME "sja1000_platform"
+#define SP_CAN_CLOCK  (16000000 / 2)
 
 MODULE_AUTHOR("Sascha Hauer <[e-mail]>");
+MODULE_AUTHOR("Wolfgang Grandegger <[e-mail]>");
 MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the platform bus");
 MODULE_ALIAS("platform:" DRV_NAME);
 MODULE_LICENSE("GPL v2");
···
 	iowrite8(val, priv->reg_base + reg * 4);
 }
 
-static int sp_probe(struct platform_device *pdev)
+static void sp_populate(struct sja1000_priv *priv,
+			struct sja1000_platform_data *pdata,
+			unsigned long resource_mem_flags)
 {
-	int err;
-	void __iomem *addr;
-	struct net_device *dev;
-	struct sja1000_priv *priv;
-	struct resource *res_mem, *res_irq;
-	struct sja1000_platform_data *pdata;
-
-	pdata = dev_get_platdata(&pdev->dev);
-	if (!pdata) {
-		dev_err(&pdev->dev, "No platform data provided!\n");
-		err = -ENODEV;
-		goto exit;
-	}
-
-	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res_mem || !res_irq) {
-		err = -ENODEV;
-		goto exit;
-	}
-
-	if (!request_mem_region(res_mem->start, resource_size(res_mem),
-				DRV_NAME)) {
-		err = -EBUSY;
-		goto exit;
-	}
-
-	addr = ioremap_nocache(res_mem->start, resource_size(res_mem));
-	if (!addr) {
-		err = -ENOMEM;
-		goto exit_release;
-	}
-
-	dev = alloc_sja1000dev(0);
-	if (!dev) {
-		err = -ENOMEM;
-		goto exit_iounmap;
-	}
-	priv = netdev_priv(dev);
-
-	dev->irq = res_irq->start;
-	priv->irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
-	if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
-		priv->irq_flags |= IRQF_SHARED;
-	priv->reg_base = addr;
 	/* The CAN clock frequency is half the oscillator clock frequency */
 	priv->can.clock.freq = pdata->osc_freq / 2;
 	priv->ocr = pdata->ocr;
 	priv->cdr = pdata->cdr;
 
-	switch (res_mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+	switch (resource_mem_flags & IORESOURCE_MEM_TYPE_MASK) {
 	case IORESOURCE_MEM_32BIT:
 		priv->read_reg = sp_read_reg32;
 		priv->write_reg = sp_write_reg32;
···
 		priv->write_reg = sp_write_reg8;
 		break;
 	}
+}
+
+static void sp_populate_of(struct sja1000_priv *priv, struct device_node *of)
+{
+	int err;
+	u32 prop;
+
+	err = of_property_read_u32(of, "reg-io-width", &prop);
+	if (err)
+		prop = 1; /* 8 bit is default */
+
+	switch (prop) {
+	case 4:
+		priv->read_reg = sp_read_reg32;
+		priv->write_reg = sp_write_reg32;
+		break;
+	case 2:
+		priv->read_reg = sp_read_reg16;
+		priv->write_reg = sp_write_reg16;
+		break;
+	case 1:	/* fallthrough */
+	default:
+		priv->read_reg = sp_read_reg8;
+		priv->write_reg = sp_write_reg8;
+	}
+
+	err = of_property_read_u32(of, "nxp,external-clock-frequency", &prop);
+	if (!err)
+		priv->can.clock.freq = prop / 2;
+	else
+		priv->can.clock.freq = SP_CAN_CLOCK; /* default */
+
+	err = of_property_read_u32(of, "nxp,tx-output-mode", &prop);
+	if (!err)
+		priv->ocr |= prop & OCR_MODE_MASK;
+	else
+		priv->ocr |= OCR_MODE_NORMAL; /* default */
+
+	err = of_property_read_u32(of, "nxp,tx-output-config", &prop);
+	if (!err)
+		priv->ocr |= (prop << OCR_TX_SHIFT) & OCR_TX_MASK;
+	else
+		priv->ocr |= OCR_TX0_PULLDOWN; /* default */
+
+	err = of_property_read_u32(of, "nxp,clock-out-frequency", &prop);
+	if (!err && prop) {
+		u32 divider = priv->can.clock.freq * 2 / prop;
+
+		if (divider > 1)
+			priv->cdr |= divider / 2 - 1;
+		else
+			priv->cdr |= CDR_CLKOUT_MASK;
+	} else {
+		priv->cdr |= CDR_CLK_OFF; /* default */
+	}
+
+	if (!of_property_read_bool(of, "nxp,no-comparator-bypass"))
+		priv->cdr |= CDR_CBP; /* default */
+}
+
+static int sp_probe(struct platform_device *pdev)
+{
+	int err, irq = 0;
+	void __iomem *addr;
+	struct net_device *dev;
+	struct sja1000_priv *priv;
+	struct resource *res_mem, *res_irq = NULL;
+	struct sja1000_platform_data *pdata;
+	struct device_node *of = pdev->dev.of_node;
+
+	pdata = dev_get_platdata(&pdev->dev);
+	if (!pdata && !of) {
+		dev_err(&pdev->dev, "No platform data provided!\n");
+		return -ENODEV;
+	}
+
+	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res_mem)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, res_mem->start,
+				     resource_size(res_mem), DRV_NAME))
+		return -EBUSY;
+
+	addr = devm_ioremap_nocache(&pdev->dev, res_mem->start,
+				    resource_size(res_mem));
+	if (!addr)
+		return -ENOMEM;
+
+	if (of)
+		irq = irq_of_parse_and_map(of, 0);
+	else
+		res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+	if (!irq && !res_irq)
+		return -ENODEV;
+
+	dev = alloc_sja1000dev(0);
+	if (!dev)
+		return -ENOMEM;
+	priv = netdev_priv(dev);
+
+	if (res_irq) {
+		irq = res_irq->start;
+		priv->irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
+		if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
+			priv->irq_flags |= IRQF_SHARED;
+	} else {
+		priv->irq_flags = IRQF_SHARED;
+	}
+
+	dev->irq = irq;
+	priv->reg_base = addr;
+
+	if (of)
+		sp_populate_of(priv, of);
+	else
+		sp_populate(priv, pdata, res_mem->flags);
 
 	platform_set_drvdata(pdev, dev);
 	SET_NETDEV_DEV(dev, &pdev->dev);
···
 
  exit_free:
 	free_sja1000dev(dev);
- exit_iounmap:
-	iounmap(addr);
- exit_release:
-	release_mem_region(res_mem->start, resource_size(res_mem));
- exit:
 	return err;
 }
 
 static int sp_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
-	struct sja1000_priv *priv = netdev_priv(dev);
-	struct resource *res;
 
 	unregister_sja1000dev(dev);
-
-	if (priv->reg_base)
-		iounmap(priv->reg_base);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
 	free_sja1000dev(dev);
 
 	return 0;
 }
+
+static struct of_device_id sp_of_table[] = {
+	{.compatible = "nxp,sja1000"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, sp_of_table);
 
 static struct platform_driver sp_driver = {
 	.probe = sp_probe,
···
 	.driver = {
 		.name = DRV_NAME,
 		.owner = THIS_MODULE,
+		.of_match_table = sp_of_table,
 	},
 };
 

include/linux/can/dev.h

···
 void can_free_echo_skb(struct net_device *dev, unsigned int idx);
 
 struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
+struct sk_buff *alloc_canfd_skb(struct net_device *dev,
+				struct canfd_frame **cfd);
 struct sk_buff *alloc_can_err_skb(struct net_device *dev,
 				  struct can_frame **cf);
 

include/uapi/linux/can.h

···
  * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
  * All rights reserved.
  *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Volkswagen nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * Alternatively, provided that this notice is retained in full, this
+ * software may be distributed under the terms of the GNU General
+ * Public License ("GPL") version 2, in which case the provisions of the
+ * GPL apply INSTEAD OF those given above.
+ *
+ * The provided data structures and external interfaces from this code
+ * are not restricted to be used by modules with a GPL compatible license.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
  */
 
 #ifndef CAN_H