Merge tag 'linux-can-next-for-4.6-20160220' of...

Merge tag 'linux-can-next-for-4.6-20160220' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2016-02-20

this is a pull request of 9 patch for net-next/master.

The first 3 patches are from Damien Riegel, they add support for
Technologic Systems IP core to tje sja100 driver. The next patches 6 by
Marek Vasut (including one my me) first clean sort the CAN driver's
Kconfig and Makefiles and then add support for the IFI CANFD IP core.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

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

+IFI CANFD controller
+--------------------
+
+Required properties:
+  - compatible: Should be "ifi,canfd-1.0"
+  - reg: Should contain CAN controller registers location and length
+  - interrupts: Should contain IRQ line for the CAN controller
+
+Example:
+
+	canfd0: canfd@ff220000 {
+		compatible = "ifi,canfd-1.0";
+		reg = <0xff220000 0x00001000>;
+		interrupts = <0 43 0>;
+	};

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

@@ -2,7 +2,7 @@ Memory mapped SJA1000 CAN controller from NXP (formerly Philips)
 
 Required properties:
 
-- compatible : should be "nxp,sja1000".
+- compatible : should be one of "nxp,sja1000", "technologic,sja1000".
 
 - reg : should specify the chip select, address offset and size required
 	to map the registers of the SJA1000. The size is usually 0x80.
@@ -14,6 +14,7 @@ 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.
+	This property is ignored for technologic version.
 	Default to 1 (8 bits).
 
 - nxp,external-clock-frequency : Frequency of the external oscillator

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -111,6 +111,7 @@ hp	Hewlett Packard
 i2se	I2SE GmbH
 ibm	International Business Machines (IBM)
 idt	Integrated Device Technologies, Inc.
+ifi	Ingenieurburo Fur Ic-Technologie (I/F/I)
 iom	Iomega Corporation
 img	Imagination Technologies Ltd.
 ingenic	Ingenic Semiconductor

drivers/net/can/Kconfig

@@ -70,13 +70,6 @@ config CAN_AT91
 	  This is a driver for the SoC CAN controller in Atmel's AT91SAM9263
 	  and AT91SAM9X5 processors.
 
-config CAN_TI_HECC
-	depends on ARM
-	tristate "TI High End CAN Controller"
-	---help---
-	  Driver for TI HECC (High End CAN Controller) module found on many
-	  TI devices. The device specifications are available from www.ti.com
-
 config CAN_BFIN
 	depends on BF534 || BF536 || BF537 || BF538 || BF539 || BF54x
 	tristate "Analog Devices Blackfin on-chip CAN"
@@ -86,30 +79,12 @@ config CAN_BFIN
 	  To compile this driver as a module, choose M here: the
 	  module will be called bfin_can.
 
-config CAN_JANZ_ICAN3
-	tristate "Janz VMOD-ICAN3 Intelligent CAN controller"
-	depends on MFD_JANZ_CMODIO
-	---help---
-	  Driver for Janz VMOD-ICAN3 Intelligent CAN controller module, which
-	  connects to a MODULbus carrier board.
-
-	  This driver can also be built as a module. If so, the module will be
-	  called janz-ican3.ko.
-
 config CAN_FLEXCAN
 	tristate "Support for Freescale FLEXCAN based chips"
 	depends on ARM || PPC
 	---help---
 	  Say Y here if you want to support for Freescale FlexCAN.
 
-config PCH_CAN
-	tristate "Intel EG20T PCH CAN controller"
-	depends on PCI && (X86_32 || COMPILE_TEST)
-	---help---
-	  This driver is for PCH CAN of Topcliff (Intel EG20T PCH) which
-	  is an IOH for x86 embedded processor (Intel Atom E6xx series).
-	  This driver can access CAN bus.
-
 config CAN_GRCAN
 	tristate "Aeroflex Gaisler GRCAN and GRHCAN CAN devices"
 	depends on OF && HAS_DMA
@@ -119,6 +94,16 @@ config CAN_GRCAN
 	  endian syntheses of the cores would need some modifications on
 	  the hardware level to work.
 
+config CAN_JANZ_ICAN3
+	tristate "Janz VMOD-ICAN3 Intelligent CAN controller"
+	depends on MFD_JANZ_CMODIO
+	---help---
+	  Driver for Janz VMOD-ICAN3 Intelligent CAN controller module, which
+	  connects to a MODULbus carrier board.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called janz-ican3.ko.
+
 config CAN_RCAR
 	tristate "Renesas R-Car CAN controller"
 	depends on ARM
@@ -139,6 +124,13 @@ config CAN_SUN4I
 	  To compile this driver as a module, choose M here: the module will
 	  be called sun4i_can.
 
+config CAN_TI_HECC
+	depends on ARM
+	tristate "TI High End CAN Controller"
+	---help---
+	  Driver for TI HECC (High End CAN Controller) module found on many
+	  TI devices. The device specifications are available from www.ti.com
+
 config CAN_XILINXCAN
 	tristate "Xilinx CAN"
 	depends on ARCH_ZYNQ || ARM64 || MICROBLAZE || COMPILE_TEST
@@ -147,22 +139,24 @@ config CAN_XILINXCAN
 	  Xilinx CAN driver. This driver supports both soft AXI CAN IP and
 	  Zynq CANPS IP.
 
-source "drivers/net/can/mscan/Kconfig"
-
-source "drivers/net/can/sja1000/Kconfig"
+config PCH_CAN
+	tristate "Intel EG20T PCH CAN controller"
+	depends on PCI && (X86_32 || COMPILE_TEST)
+	---help---
+	  This driver is for PCH CAN of Topcliff (Intel EG20T PCH) which
+	  is an IOH for x86 embedded processor (Intel Atom E6xx series).
+	  This driver can access CAN bus.
 
 source "drivers/net/can/c_can/Kconfig"
-
-source "drivers/net/can/m_can/Kconfig"
-
 source "drivers/net/can/cc770/Kconfig"
-
+source "drivers/net/can/ifi_canfd/Kconfig"
+source "drivers/net/can/m_can/Kconfig"
+source "drivers/net/can/mscan/Kconfig"
+source "drivers/net/can/sja1000/Kconfig"
+source "drivers/net/can/softing/Kconfig"
 source "drivers/net/can/spi/Kconfig"
-
 source "drivers/net/can/usb/Kconfig"
 
-source "drivers/net/can/softing/Kconfig"
-
 endif
 
 config CAN_DEBUG_DEVICES

drivers/net/can/Makefile

@@ -14,21 +14,22 @@ obj-y				+= spi/
 obj-y				+= usb/
 obj-y				+= softing/
 
-obj-$(CONFIG_CAN_SJA1000)	+= sja1000/
-obj-$(CONFIG_CAN_MSCAN)		+= mscan/
-obj-$(CONFIG_CAN_C_CAN)		+= c_can/
-obj-$(CONFIG_CAN_M_CAN)		+= m_can/
-obj-$(CONFIG_CAN_CC770)		+= cc770/
 obj-$(CONFIG_CAN_AT91)		+= at91_can.o
-obj-$(CONFIG_CAN_TI_HECC)	+= ti_hecc.o
 obj-$(CONFIG_CAN_BFIN)		+= bfin_can.o
-obj-$(CONFIG_CAN_JANZ_ICAN3)	+= janz-ican3.o
+obj-$(CONFIG_CAN_CC770)		+= cc770/
+obj-$(CONFIG_CAN_C_CAN)		+= c_can/
 obj-$(CONFIG_CAN_FLEXCAN)	+= flexcan.o
-obj-$(CONFIG_PCH_CAN)		+= pch_can.o
 obj-$(CONFIG_CAN_GRCAN)		+= grcan.o
+obj-$(CONFIG_CAN_IFI_CANFD)	+= ifi_canfd/
+obj-$(CONFIG_CAN_JANZ_ICAN3)	+= janz-ican3.o
+obj-$(CONFIG_CAN_MSCAN)		+= mscan/
+obj-$(CONFIG_CAN_M_CAN)		+= m_can/
 obj-$(CONFIG_CAN_RCAR)		+= rcar_can.o
+obj-$(CONFIG_CAN_SJA1000)	+= sja1000/
 obj-$(CONFIG_CAN_SUN4I)		+= sun4i_can.o
+obj-$(CONFIG_CAN_TI_HECC)	+= ti_hecc.o
 obj-$(CONFIG_CAN_XILINXCAN)	+= xilinx_can.o
+obj-$(CONFIG_PCH_CAN)		+= pch_can.o
 
 subdir-ccflags-y += -D__CHECK_ENDIAN__
 subdir-ccflags-$(CONFIG_CAN_DEBUG_DEVICES) += -DDEBUG

drivers/net/can/ifi_canfd/Kconfig

+config CAN_IFI_CANFD
+	depends on HAS_IOMEM
+	tristate "IFI CAN_FD IP"
+	---help---
+	  This driver adds support for the I/F/I CAN_FD soft IP block
+	  connected to the "platform bus" (Linux abstraction for directly
+	  to the processor attached devices). The CAN_FD is most often
+	  synthesised into an FPGA or CPLD.

drivers/net/can/ifi_canfd/Makefile

+#
+#  Makefile for the IFI CANFD controller driver.
+#
+
+obj-$(CONFIG_CAN_IFI_CANFD) += ifi_canfd.o

drivers/net/can/sja1000/sja1000_platform.c

@@ -27,6 +27,7 @@
 #include <linux/can/platform/sja1000.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/of_irq.h>
 
 #include "sja1000.h"
@@ -40,6 +41,15 @@ MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the platform bus");
 MODULE_ALIAS("platform:" DRV_NAME);
 MODULE_LICENSE("GPL v2");
 
+struct sja1000_of_data {
+	size_t  priv_sz;
+	int     (*init)(struct sja1000_priv *priv, struct device_node *of);
+};
+
+struct technologic_priv {
+	spinlock_t      io_lock;
+};
+
 static u8 sp_read_reg8(const struct sja1000_priv *priv, int reg)
 {
 	return ioread8(priv->reg_base + reg);
@@ -70,6 +80,43 @@ static void sp_write_reg32(const struct sja1000_priv *priv, int reg, u8 val)
 	iowrite8(val, priv->reg_base + reg * 4);
 }
 
+static u8 sp_technologic_read_reg16(const struct sja1000_priv *priv, int reg)
+{
+	struct technologic_priv *tp = priv->priv;
+	unsigned long flags;
+	u8 val;
+
+	spin_lock_irqsave(&tp->io_lock, flags);
+	iowrite16(reg, priv->reg_base + 0);
+	val = ioread16(priv->reg_base + 2);
+	spin_unlock_irqrestore(&tp->io_lock, flags);
+
+	return val;
+}
+
+static void sp_technologic_write_reg16(const struct sja1000_priv *priv,
+				       int reg, u8 val)
+{
+	struct technologic_priv *tp = priv->priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&tp->io_lock, flags);
+	iowrite16(reg, priv->reg_base + 0);
+	iowrite16(val, priv->reg_base + 2);
+	spin_unlock_irqrestore(&tp->io_lock, flags);
+}
+
+static int sp_technologic_init(struct sja1000_priv *priv, struct device_node *of)
+{
+	struct technologic_priv *tp = priv->priv;
+
+	priv->read_reg = sp_technologic_read_reg16;
+	priv->write_reg = sp_technologic_write_reg16;
+	spin_lock_init(&tp->io_lock);
+
+	return 0;
+}
+
 static void sp_populate(struct sja1000_priv *priv,
 			struct sja1000_platform_data *pdata,
 			unsigned long resource_mem_flags)
@@ -154,6 +201,18 @@ static void sp_populate_of(struct sja1000_priv *priv, struct device_node *of)
 		priv->cdr |= CDR_CBP; /* default */
 }
 
+static struct sja1000_of_data technologic_data = {
+	.priv_sz = sizeof(struct technologic_priv),
+	.init = sp_technologic_init,
+};
+
+static const struct of_device_id sp_of_table[] = {
+	{ .compatible = "nxp,sja1000", .data = NULL, },
+	{ .compatible = "technologic,sja1000", .data = &technologic_data, },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sp_of_table);
+
 static int sp_probe(struct platform_device *pdev)
 {
 	int err, irq = 0;
@@ -163,6 +222,9 @@ static int sp_probe(struct platform_device *pdev)
 	struct resource *res_mem, *res_irq = NULL;
 	struct sja1000_platform_data *pdata;
 	struct device_node *of = pdev->dev.of_node;
+	const struct of_device_id *of_id;
+	const struct sja1000_of_data *of_data = NULL;
+	size_t priv_sz = 0;
 
 	pdata = dev_get_platdata(&pdev->dev);
 	if (!pdata && !of) {
@@ -191,7 +253,13 @@ static int sp_probe(struct platform_device *pdev)
 	if (!irq && !res_irq)
 		return -ENODEV;
 
-	dev = alloc_sja1000dev(0);
+	of_id = of_match_device(sp_of_table, &pdev->dev);
+	if (of_id && of_id->data) {
+		of_data = of_id->data;
+		priv_sz = of_data->priv_sz;
+	}
+
+	dev = alloc_sja1000dev(priv_sz);
 	if (!dev)
 		return -ENOMEM;
 	priv = netdev_priv(dev);
@@ -208,10 +276,17 @@ static int sp_probe(struct platform_device *pdev)
 	dev->irq = irq;
 	priv->reg_base = addr;
 
-	if (of)
+	if (of) {
 		sp_populate_of(priv, of);
-	else
+
+		if (of_data && of_data->init) {
+			err = of_data->init(priv, of);
+			if (err)
+				goto exit_free;
+		}
+	} else {
 		sp_populate(priv, pdata, res_mem->flags);
+	}
 
 	platform_set_drvdata(pdev, dev);
 	SET_NETDEV_DEV(dev, &pdev->dev);
@@ -242,12 +317,6 @@ static int sp_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const 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,
 	.remove = sp_remove,