[PATCH net-next v6 0/4] can: cc770: add support for the Bosch CC770 and Intel AN82527

[PATCH net-next v6 0/4] can: cc770: add support for the Bosch CC770 and Intel AN82527

[Wolfgang Grandegger]

Already since a while we have support for the Bosch CC770 and Intel
AN82527 CAN controllers in our out-of-tree Socket-CAN repository.

In the meantime I found a TQM855L board with two AN82527 on it,
which allowed me to provide and test a generic platform driver
as well.

Changes since v1:

- remove version.h includes
- some minor corrections in the ISA bus driver
- add platform header file to the driver core
- add generic platform driver
- add and update device tree nodes for tqm8xx and tqm8548

Changes since v2:

- correct license text as suggest by Oliver Hartkopp
- use the new module_platform_driver function
- provide get_berr_counter callback for cc770
- improve CAN error state change handling
- more comprehensive cc770_isa driver description

Changes since v3:

- pre-define pr_fmt()
- use KBUILD_MODNAME instead of DRV_NAME
- use ARRAY_SIZE() whenever appropriate
- use variable name "o" for message objects consistantly
- use proper error code for cc770_probe_chip
- remove unneeded member priv->open_time
- remove unnecessary masking of u8 variables (with 0xff)
- use "!skb" instead of "skb == NULL"
- CC770_MSG_MAX now limits the number of messages read in the ISR
- use "|" instead of "+" to combine bit masks
- remove return code check of platform_get_resource() in remove function
- remove postal address from GPL copyright text
- fix WARNING: __packed is preferred over __attribute__((packed))
- some more minor fixes (casts, white space, etc.)

Changes since v4:

- cc770_isa: add missing cc770 platform include

Changes since v5:

- cc770_platform: fix build issues on ARM and x86 by replacing
  in_8/out8 with ioread8/iowrite8 amd including some missing
  header files
- cc770_platform: remove trailing lines

It would be nice if somebody else could test the driver, especially
the ISA driver (I don't have hardware at hand).

Wolfgang.

Wolfgang Grandegger (4):
  can: cc770: add driver core for the Bosch CC770 and Intel AN82527
  can: cc770: add legacy ISA bus driver for the CC770 and AN82527
  can: cc770: add platform bus driver for the CC770 and AN82527
  powerpc: tqm8548/tqm8xx: add and update CAN device nodes

 .../devicetree/bindings/net/can/cc770.txt          |   53 ++
 arch/powerpc/boot/dts/tqm8548-bigflash.dts         |   19 +-
 arch/powerpc/boot/dts/tqm8548.dts                  |   19 +-
 arch/powerpc/boot/dts/tqm8xx.dts                   |   25 +
 drivers/net/can/Kconfig                            |    2 +
 drivers/net/can/Makefile                           |    1 +
 drivers/net/can/cc770/Kconfig                      |   21 +
 drivers/net/can/cc770/Makefile                     |    9 +
 drivers/net/can/cc770/cc770.c                      |  881 ++++++++++++++++++++
 drivers/net/can/cc770/cc770.h                      |  203 +++++
 drivers/net/can/cc770/cc770_isa.c                  |  367 ++++++++
 drivers/net/can/cc770/cc770_platform.c             |  272 ++++++
 include/linux/can/platform/cc770.h                 |   33 +
 13 files changed, 1895 insertions(+), 10 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/cc770.txt
 create mode 100644 drivers/net/can/cc770/Kconfig
 create mode 100644 drivers/net/can/cc770/Makefile
 create mode 100644 drivers/net/can/cc770/cc770.c
 create mode 100644 drivers/net/can/cc770/cc770.h
 create mode 100644 drivers/net/can/cc770/cc770_isa.c
 create mode 100644 drivers/net/can/cc770/cc770_platform.c
 create mode 100644 include/linux/can/platform/cc770.h

-- 
1.7.4.1

[PATCH net-next v6 1/4] can: cc770: add driver core for the Bosch CC770 and Intel AN82527

[Wolfgang Grandegger]

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/Kconfig            |    2 +
 drivers/net/can/Makefile           |    1 +
 drivers/net/can/cc770/Kconfig      |    3 +
 drivers/net/can/cc770/Makefile     |    7 +
 drivers/net/can/cc770/cc770.c      |  881 ++++++++++++++++++++++++++++++++++++
 drivers/net/can/cc770/cc770.h      |  203 +++++++++
 include/linux/can/platform/cc770.h |   33 ++
 7 files changed, 1130 insertions(+), 0 deletions(-)
 create mode 100644 drivers/net/can/cc770/Kconfig
 create mode 100644 drivers/net/can/cc770/Makefile
 create mode 100644 drivers/net/can/cc770/cc770.c
 create mode 100644 drivers/net/can/cc770/cc770.h
 create mode 100644 include/linux/can/platform/cc770.h

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index f6c98fb..ab45758 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -116,6 +116,8 @@ source "drivers/net/can/sja1000/Kconfig"
 
 source "drivers/net/can/c_can/Kconfig"
 
+source "drivers/net/can/cc770/Kconfig"
+
 source "drivers/net/can/usb/Kconfig"
 
 source "drivers/net/can/softing/Kconfig"
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index 24ebfe8..938be37 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -14,6 +14,7 @@ obj-y				+= softing/
 obj-$(CONFIG_CAN_SJA1000)	+= sja1000/
 obj-$(CONFIG_CAN_MSCAN)		+= mscan/
 obj-$(CONFIG_CAN_C_CAN)		+= c_can/
+obj-$(CONFIG_CAN_CC770)		+= cc770/
 obj-$(CONFIG_CAN_AT91)		+= at91_can.o
 obj-$(CONFIG_CAN_TI_HECC)	+= ti_hecc.o
 obj-$(CONFIG_CAN_MCP251X)	+= mcp251x.o
diff --git a/drivers/net/can/cc770/Kconfig b/drivers/net/can/cc770/Kconfig
new file mode 100644
index 0000000..225131b
--- /dev/null
+++ b/drivers/net/can/cc770/Kconfig
@@ -0,0 +1,3 @@
+menuconfig CAN_CC770
+	tristate "Bosch CC770 and Intel AN82527 devices"
+	depends on CAN_DEV && HAS_IOMEM
diff --git a/drivers/net/can/cc770/Makefile b/drivers/net/can/cc770/Makefile
new file mode 100644
index 0000000..34e8180
--- /dev/null
+++ b/drivers/net/can/cc770/Makefile
@@ -0,0 +1,7 @@
+#
+#  Makefile for the Bosch CC770 CAN controller drivers.
+#
+
+obj-$(CONFIG_CAN_CC770) += cc770.o
+
+ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c
new file mode 100644
index 0000000..7668967
--- /dev/null
+++ b/drivers/net/can/cc770/cc770.c
@@ -0,0 +1,881 @@
+/*
+ * Core driver for the CC770 and AN82527 CAN controllers
+ *
+ * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/error.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/cc770.h>
+
+#include "cc770.h"
+
+MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION(KBUILD_MODNAME "CAN netdevice driver");
+
+/*
+ * The CC770 is a CAN controller from Bosch, which is 100% compatible
+ * with the AN82527 from Intel, but with "bugs" being fixed and some
+ * additional functionality, mainly:
+ *
+ * 1. RX and TX error counters are readable.
+ * 2. Support of silent (listen-only) mode.
+ * 3. Message object 15 can receive all types of frames, also RTR and EFF.
+ *
+ * Details are available from Bosch's "CC770_Product_Info_2007-01.pdf",
+ * which explains in detail the compatibility between the CC770 and the
+ * 82527. This driver use the additional functionality 3. on real CC770
+ * devices. Unfortunately, the CC770 does still not store the message
+ * identifier of received remote transmission request frames and
+ * therefore it's set to 0.
+ *
+ * The message objects 1..14 can be used for TX and RX while the message
+ * objects 15 is optimized for RX. It has a shadow register for reliable
+ * data receiption under heavy bus load. Therefore it makes sense to use
+ * this message object for the needed use case. The frame type (EFF/SFF)
+ * for the message object 15 can be defined via kernel module parameter
+ * "msgobj15_eff". If not equal 0, it will receive 29-bit EFF frames,
+ * otherwise 11 bit SFF messages.
+ */
+static int msgobj15_eff;
+module_param(msgobj15_eff, int, S_IRUGO);
+MODULE_PARM_DESC(msgobj15_eff, "Extended 29-bit frames for message object 15 "
+		 "(default: 11-bit standard frames)");
+
+static int i82527_compat;
+module_param(i82527_compat, int, S_IRUGO);
+MODULE_PARM_DESC(i82527_compat, "Strict Intel 82527 comptibility mode "
+		 "without using additional functions");
+
+/*
+ * This driver uses the last 5 message objects 11..15. The definitions
+ * and structure below allows to configure and assign them to the real
+ * message object.
+ */
+static unsigned char cc770_obj_flags[CC770_OBJ_MAX] = {
+	[CC770_OBJ_RX0] = CC770_OBJ_FLAG_RX,
+	[CC770_OBJ_RX1] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_EFF,
+	[CC770_OBJ_RX_RTR0] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_RTR,
+	[CC770_OBJ_RX_RTR1] = CC770_OBJ_FLAG_RX | CC770_OBJ_FLAG_RTR |
+			      CC770_OBJ_FLAG_EFF,
+	[CC770_OBJ_TX] = 0,
+};
+
+static struct can_bittiming_const cc770_bittiming_const = {
+	.name = KBUILD_MODNAME,
+	.tseg1_min = 1,
+	.tseg1_max = 16,
+	.tseg2_min = 1,
+	.tseg2_max = 8,
+	.sjw_max = 4,
+	.brp_min = 1,
+	.brp_max = 64,
+	.brp_inc = 1,
+};
+
+static inline int intid2obj(unsigned int intid)
+{
+	if (intid == 2)
+		return 0;
+	else
+		return MSGOBJ_LAST + 2 - intid;
+}
+
+static void enable_all_objs(const struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	u8 msgcfg;
+	unsigned char obj_flags;
+	unsigned int o, mo;
+
+	for (o = 0; o < ARRAY_SIZE(priv->obj_flags); o++) {
+		obj_flags = priv->obj_flags[o];
+		mo = obj2msgobj(o);
+
+		if (obj_flags & CC770_OBJ_FLAG_RX) {
+			/*
+			 * We don't need extra objects for RTR and EFF if
+			 * the additional CC770 functions are enabled.
+			 */
+			if (priv->control_normal_mode & CTRL_EAF) {
+				if (o > 0)
+					continue;
+				netdev_dbg(dev, "Message object %d for "
+					   "RX data, RTR, SFF and EFF\n", mo);
+			} else {
+				netdev_dbg(dev,
+					   "Message object %d for RX %s %s\n",
+					   mo, obj_flags & CC770_OBJ_FLAG_RTR ?
+					   "RTR" : "data",
+					   obj_flags & CC770_OBJ_FLAG_EFF ?
+					   "EFF" : "SFF");
+			}
+
+			if (obj_flags & CC770_OBJ_FLAG_EFF)
+				msgcfg = MSGCFG_XTD;
+			else
+				msgcfg = 0;
+			if (obj_flags & CC770_OBJ_FLAG_RTR)
+				msgcfg |= MSGCFG_DIR;
+
+			cc770_write_reg(priv, msgobj[mo].config, msgcfg);
+			cc770_write_reg(priv, msgobj[mo].ctrl0,
+					MSGVAL_SET | TXIE_RES |
+					RXIE_SET | INTPND_RES);
+
+			if (obj_flags & CC770_OBJ_FLAG_RTR)
+				cc770_write_reg(priv, msgobj[mo].ctrl1,
+						NEWDAT_RES | CPUUPD_SET |
+						TXRQST_RES | RMTPND_RES);
+			else
+				cc770_write_reg(priv, msgobj[mo].ctrl1,
+						NEWDAT_RES | MSGLST_RES |
+						TXRQST_RES | RMTPND_RES);
+		} else {
+			netdev_dbg(dev, "Message object %d for "
+				   "TX data, RTR, SFF and EFF\n", mo);
+
+			cc770_write_reg(priv, msgobj[mo].ctrl1,
+					RMTPND_RES | TXRQST_RES |
+					CPUUPD_RES | NEWDAT_RES);
+			cc770_write_reg(priv, msgobj[mo].ctrl0,
+					MSGVAL_RES | TXIE_RES |
+					RXIE_RES | INTPND_RES);
+		}
+	}
+}
+
+static void disable_all_objs(const struct cc770_priv *priv)
+{
+	int o, mo;
+
+	for (o = 0; o <  ARRAY_SIZE(priv->obj_flags); o++) {
+		mo = obj2msgobj(o);
+
+		if (priv->obj_flags[o] & CC770_OBJ_FLAG_RX) {
+			if (o > 0 && priv->control_normal_mode & CTRL_EAF)
+				continue;
+
+			cc770_write_reg(priv, msgobj[mo].ctrl1,
+					NEWDAT_RES | MSGLST_RES |
+					TXRQST_RES | RMTPND_RES);
+			cc770_write_reg(priv, msgobj[mo].ctrl0,
+					MSGVAL_RES | TXIE_RES |
+					RXIE_RES | INTPND_RES);
+		} else {
+			/* Clear message object for send */
+			cc770_write_reg(priv, msgobj[mo].ctrl1,
+					RMTPND_RES | TXRQST_RES |
+					CPUUPD_RES | NEWDAT_RES);
+			cc770_write_reg(priv, msgobj[mo].ctrl0,
+					MSGVAL_RES | TXIE_RES |
+					RXIE_RES | INTPND_RES);
+		}
+	}
+}
+
+static void set_reset_mode(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+
+	/* Enable configuration and puts chip in bus-off, disable interrupts */
+	cc770_write_reg(priv, control, CTRL_CCE | CTRL_INI);
+
+	priv->can.state = CAN_STATE_STOPPED;
+
+	/* Clear interrupts */
+	cc770_read_reg(priv, interrupt);
+
+	/* Clear status register */
+	cc770_write_reg(priv, status, 0);
+
+	/* Disable all used message objects */
+	disable_all_objs(priv);
+}
+
+static void set_normal_mode(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+
+	/* Clear interrupts */
+	cc770_read_reg(priv, interrupt);
+
+	/* Clear status register and pre-set last error code */
+	cc770_write_reg(priv, status, STAT_LEC_MASK);
+
+	/* Enable all used message objects*/
+	enable_all_objs(dev);
+
+	/*
+	 * Clear bus-off, interrupts only for errors,
+	 * not for status change
+	 */
+	cc770_write_reg(priv, control, priv->control_normal_mode);
+
+	priv->can.state = CAN_STATE_ERROR_ACTIVE;
+}
+
+static void chipset_init(struct cc770_priv *priv)
+{
+	int mo, id, data;
+
+	/* Enable configuration and put chip in bus-off, disable interrupts */
+	cc770_write_reg(priv, control, (CTRL_CCE | CTRL_INI));
+
+	/* Set CLKOUT divider and slew rates */
+	cc770_write_reg(priv, clkout, priv->clkout);
+
+	/* Configure CPU interface / CLKOUT enable */
+	cc770_write_reg(priv, cpu_interface, priv->cpu_interface);
+
+	/* Set bus configuration  */
+	cc770_write_reg(priv, bus_config, priv->bus_config);
+
+	/* Clear interrupts */
+	cc770_read_reg(priv, interrupt);
+
+	/* Clear status register */
+	cc770_write_reg(priv, status, 0);
+
+	/* Clear and invalidate message objects */
+	for (mo = MSGOBJ_FIRST; mo <= MSGOBJ_LAST; mo++) {
+		cc770_write_reg(priv, msgobj[mo].ctrl0,
+				INTPND_UNC | RXIE_RES |
+				TXIE_RES | MSGVAL_RES);
+		cc770_write_reg(priv, msgobj[mo].ctrl0,
+				INTPND_RES | RXIE_RES |
+				TXIE_RES | MSGVAL_RES);
+		cc770_write_reg(priv, msgobj[mo].ctrl1,
+				NEWDAT_RES | MSGLST_RES |
+				TXRQST_RES | RMTPND_RES);
+		for (data = 0; data < 8; data++)
+			cc770_write_reg(priv, msgobj[mo].data[data], 0);
+		for (id = 0; id < 4; id++)
+			cc770_write_reg(priv, msgobj[mo].id[id], 0);
+		cc770_write_reg(priv, msgobj[mo].config, 0);
+	}
+
+	/* Set all global ID masks to "don't care" */
+	cc770_write_reg(priv, global_mask_std[0], 0);
+	cc770_write_reg(priv, global_mask_std[1], 0);
+	cc770_write_reg(priv, global_mask_ext[0], 0);
+	cc770_write_reg(priv, global_mask_ext[1], 0);
+	cc770_write_reg(priv, global_mask_ext[2], 0);
+	cc770_write_reg(priv, global_mask_ext[3], 0);
+
+}
+
+static int cc770_probe_chip(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+
+	/* Enable configuration, put chip in bus-off, disable ints */
+	cc770_write_reg(priv, control, CTRL_CCE | CTRL_EAF | CTRL_INI);
+	/* Configure cpu interface / CLKOUT disable */
+	cc770_write_reg(priv, cpu_interface, priv->cpu_interface);
+
+	/*
+	 * Check if hardware reset is still inactive or maybe there
+	 * is no chip in this address space
+	 */
+	if (cc770_read_reg(priv, cpu_interface) & CPUIF_RST) {
+		netdev_info(dev, "probing @0x%p failed (reset)\n",
+			    priv->reg_base);
+		return -ENODEV;
+	}
+
+	/* Write and read back test pattern (some arbitrary values) */
+	cc770_write_reg(priv, msgobj[1].data[1], 0x25);
+	cc770_write_reg(priv, msgobj[2].data[3], 0x52);
+	cc770_write_reg(priv, msgobj[10].data[6], 0xc3);
+	if ((cc770_read_reg(priv, msgobj[1].data[1]) != 0x25) ||
+	    (cc770_read_reg(priv, msgobj[2].data[3]) != 0x52) ||
+	    (cc770_read_reg(priv, msgobj[10].data[6]) != 0xc3)) {
+		netdev_info(dev, "probing @0x%p failed (pattern)\n",
+			    priv->reg_base);
+		return -ENODEV;
+	}
+
+	/* Check if this chip is a CC770 supporting additional functions */
+	if (cc770_read_reg(priv, control) & CTRL_EAF)
+		priv->control_normal_mode |= CTRL_EAF;
+
+	return 0;
+}
+
+static void cc770_start(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+
+	/* leave reset mode */
+	if (priv->can.state != CAN_STATE_STOPPED)
+		set_reset_mode(dev);
+
+	/* leave reset mode */
+	set_normal_mode(dev);
+}
+
+static int cc770_set_mode(struct net_device *dev, enum can_mode mode)
+{
+	switch (mode) {
+	case CAN_MODE_START:
+		cc770_start(dev);
+		netif_wake_queue(dev);
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int cc770_set_bittiming(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct can_bittiming *bt = &priv->can.bittiming;
+	u8 btr0, btr1;
+
+	btr0 = ((bt->brp - 1) & 0x3f) | (((bt->sjw - 1) & 0x3) << 6);
+	btr1 = ((bt->prop_seg + bt->phase_seg1 - 1) & 0xf) |
+		(((bt->phase_seg2 - 1) & 0x7) << 4);
+	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
+		btr1 |= 0x80;
+
+	netdev_info(dev, "setting BTR0=0x%02x BTR1=0x%02x\n", btr0, btr1);
+
+	cc770_write_reg(priv, bit_timing_0, btr0);
+	cc770_write_reg(priv, bit_timing_1, btr1);
+
+	return 0;
+}
+
+static int cc770_get_berr_counter(const struct net_device *dev,
+				  struct can_berr_counter *bec)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+
+	bec->txerr = cc770_read_reg(priv, tx_error_counter);
+	bec->rxerr = cc770_read_reg(priv, rx_error_counter);
+
+	return 0;
+}
+
+static netdev_tx_t cc770_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct net_device_stats *stats = &dev->stats;
+	struct can_frame *cf = (struct can_frame *)skb->data;
+	unsigned int mo = obj2msgobj(CC770_OBJ_TX);
+	u8 dlc, rtr;
+	u32 id;
+	int i;
+
+	if (can_dropped_invalid_skb(dev, skb))
+		return NETDEV_TX_OK;
+
+	if ((cc770_read_reg(priv,
+			    msgobj[mo].ctrl1) & TXRQST_UNC) == TXRQST_SET) {
+		netdev_err(dev, "TX register is still occupied!\n");
+		return NETDEV_TX_BUSY;
+	}
+
+	netif_stop_queue(dev);
+
+	dlc = cf->can_dlc;
+	id = cf->can_id;
+	if (cf->can_id & CAN_RTR_FLAG)
+		rtr = 0;
+	else
+		rtr = MSGCFG_DIR;
+	cc770_write_reg(priv, msgobj[mo].ctrl1,
+			RMTPND_RES | TXRQST_RES | CPUUPD_SET | NEWDAT_RES);
+	cc770_write_reg(priv, msgobj[mo].ctrl0,
+			MSGVAL_SET | TXIE_SET | RXIE_RES | INTPND_RES);
+	if (id & CAN_EFF_FLAG) {
+		id &= CAN_EFF_MASK;
+		cc770_write_reg(priv, msgobj[mo].config,
+				(dlc << 4) | rtr | MSGCFG_XTD);
+		cc770_write_reg(priv, msgobj[mo].id[3], id << 3);
+		cc770_write_reg(priv, msgobj[mo].id[2], id >> 5);
+		cc770_write_reg(priv, msgobj[mo].id[1], id >> 13);
+		cc770_write_reg(priv, msgobj[mo].id[0], id >> 21);
+	} else {
+		id &= CAN_SFF_MASK;
+		cc770_write_reg(priv, msgobj[mo].config, (dlc << 4) | rtr);
+		cc770_write_reg(priv, msgobj[mo].id[0], id >> 3);
+		cc770_write_reg(priv, msgobj[mo].id[1], id << 5);
+	}
+
+	for (i = 0; i < dlc; i++)
+		cc770_write_reg(priv, msgobj[mo].data[i], cf->data[i]);
+
+	cc770_write_reg(priv, msgobj[mo].ctrl1,
+			RMTPND_RES | TXRQST_SET | CPUUPD_RES | NEWDAT_UNC);
+
+	stats->tx_bytes += dlc;
+
+	can_put_echo_skb(skb, dev, 0);
+
+	/*
+	 * HM: We had some cases of repeated IRQs so make sure the
+	 * INT is acknowledged I know it's already further up, but
+	 * doing again fixed the issue
+	 */
+	cc770_write_reg(priv, msgobj[mo].ctrl0,
+			MSGVAL_UNC | TXIE_UNC | RXIE_UNC | INTPND_RES);
+
+	return NETDEV_TX_OK;
+}
+
+static void cc770_rx(struct net_device *dev, unsigned int mo, u8 ctrl1)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct net_device_stats *stats = &dev->stats;
+	struct can_frame *cf;
+	struct sk_buff *skb;
+	u8 config;
+	u32 id;
+	int i;
+
+	skb = alloc_can_skb(dev, &cf);
+	if (!skb)
+		return;
+
+	config = cc770_read_reg(priv, msgobj[mo].config);
+
+	if (ctrl1 & RMTPND_SET) {
+		/*
+		 * Unfortunately, the chip does not store the real message
+		 * identifier of the received remote transmission request
+		 * frame. Therefore we set it to 0.
+		 */
+		cf->can_id = CAN_RTR_FLAG;
+		if (config & MSGCFG_XTD)
+			cf->can_id |= CAN_EFF_FLAG;
+		cf->can_dlc = 0;
+	} else {
+		if (config & MSGCFG_XTD) {
+			id = cc770_read_reg(priv, msgobj[mo].id[3]);
+			id |= cc770_read_reg(priv, msgobj[mo].id[2]) << 8;
+			id |= cc770_read_reg(priv, msgobj[mo].id[1]) << 16;
+			id |= cc770_read_reg(priv, msgobj[mo].id[0]) << 24;
+			id >>= 3;
+			id |= CAN_EFF_FLAG;
+		} else {
+			id = cc770_read_reg(priv, msgobj[mo].id[1]);
+			id |= cc770_read_reg(priv, msgobj[mo].id[0]) << 8;
+			id >>= 5;
+		}
+
+		cf->can_id = id;
+		cf->can_dlc = get_can_dlc((config & 0xf0) >> 4);
+		for (i = 0; i < cf->can_dlc; i++)
+			cf->data[i] = cc770_read_reg(priv, msgobj[mo].data[i]);
+	}
+	netif_rx(skb);
+
+	stats->rx_packets++;
+	stats->rx_bytes += cf->can_dlc;
+}
+
+static int cc770_err(struct net_device *dev, u8 status)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct net_device_stats *stats = &dev->stats;
+	struct can_frame *cf;
+	struct sk_buff *skb;
+	u8 lec;
+
+	netdev_dbg(dev, "status interrupt (%#x)\n", status);
+
+	skb = alloc_can_err_skb(dev, &cf);
+	if (!skb)
+		return -ENOMEM;
+
+	/* Use extended functions of the CC770 */
+	if (priv->control_normal_mode & CTRL_EAF) {
+		cf->data[6] = cc770_read_reg(priv, tx_error_counter);
+		cf->data[7] = cc770_read_reg(priv, rx_error_counter);
+	}
+
+	if (status & STAT_BOFF) {
+		/* Disable interrupts */
+		cc770_write_reg(priv, control, CTRL_INI);
+		cf->can_id |= CAN_ERR_BUSOFF;
+		priv->can.state = CAN_STATE_BUS_OFF;
+		can_bus_off(dev);
+	} else if (status & STAT_WARN) {
+		cf->can_id |= CAN_ERR_CRTL;
+		/* Only the CC770 does show error passive */
+		if (cf->data[7] > 127) {
+			cf->data[1] = CAN_ERR_CRTL_RX_PASSIVE |
+				CAN_ERR_CRTL_TX_PASSIVE;
+			priv->can.state = CAN_STATE_ERROR_PASSIVE;
+			priv->can.can_stats.error_passive++;
+		} else {
+			cf->data[1] = CAN_ERR_CRTL_RX_WARNING |
+				CAN_ERR_CRTL_TX_WARNING;
+			priv->can.state = CAN_STATE_ERROR_WARNING;
+			priv->can.can_stats.error_warning++;
+		}
+	} else {
+		/* Back to error avtive */
+		cf->can_id |= CAN_ERR_PROT;
+		cf->data[2] = CAN_ERR_PROT_ACTIVE;
+		priv->can.state = CAN_STATE_ERROR_ACTIVE;
+	}
+
+	lec = status & STAT_LEC_MASK;
+	if (lec < 7 && lec > 0) {
+		if (lec == STAT_LEC_ACK) {
+			cf->can_id |= CAN_ERR_ACK;
+		} else {
+			cf->can_id |= CAN_ERR_PROT;
+			switch (lec) {
+			case STAT_LEC_STUFF:
+				cf->data[2] |= CAN_ERR_PROT_STUFF;
+				break;
+			case STAT_LEC_FORM:
+				cf->data[2] |= CAN_ERR_PROT_FORM;
+				break;
+			case STAT_LEC_BIT1:
+				cf->data[2] |= CAN_ERR_PROT_BIT1;
+				break;
+			case STAT_LEC_BIT0:
+				cf->data[2] |= CAN_ERR_PROT_BIT0;
+				break;
+			case STAT_LEC_CRC:
+				cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ;
+				break;
+			}
+		}
+	}
+
+	netif_rx(skb);
+
+	stats->rx_packets++;
+	stats->rx_bytes += cf->can_dlc;
+
+	return 0;
+}
+
+static int cc770_status_interrupt(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	u8 status;
+
+	status = cc770_read_reg(priv, status);
+	/* Reset the status register including RXOK and TXOK */
+	cc770_write_reg(priv, status, STAT_LEC_MASK);
+
+	if (status & (STAT_WARN | STAT_BOFF) ||
+	    (status & STAT_LEC_MASK) != STAT_LEC_MASK) {
+		cc770_err(dev, status);
+		return status & STAT_BOFF;
+	}
+
+	return 0;
+}
+
+static void cc770_rx_interrupt(struct net_device *dev, unsigned int o)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct net_device_stats *stats = &dev->stats;
+	unsigned int mo = obj2msgobj(o);
+	u8 ctrl1;
+	int n = CC770_MAX_MSG;
+
+	while (n--) {
+		ctrl1 = cc770_read_reg(priv, msgobj[mo].ctrl1);
+
+		if (!(ctrl1 & NEWDAT_SET))  {
+			/* Check for RTR if additional functions are enabled */
+			if (priv->control_normal_mode & CTRL_EAF) {
+				if (!(cc770_read_reg(priv, msgobj[mo].ctrl0) &
+				      INTPND_SET))
+					break;
+			} else {
+				break;
+			}
+		}
+
+		if (ctrl1 & MSGLST_SET) {
+			stats->rx_over_errors++;
+			stats->rx_errors++;
+		}
+		if (mo < MSGOBJ_LAST)
+			cc770_write_reg(priv, msgobj[mo].ctrl1,
+					NEWDAT_RES | MSGLST_RES |
+					TXRQST_UNC | RMTPND_UNC);
+		cc770_rx(dev, mo, ctrl1);
+
+		cc770_write_reg(priv, msgobj[mo].ctrl0,
+				MSGVAL_SET | TXIE_RES |
+				RXIE_SET | INTPND_RES);
+		cc770_write_reg(priv, msgobj[mo].ctrl1,
+				NEWDAT_RES | MSGLST_RES |
+				TXRQST_RES | RMTPND_RES);
+	}
+}
+
+static void cc770_rtr_interrupt(struct net_device *dev, unsigned int o)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	unsigned int mo = obj2msgobj(o);
+	u8 ctrl0, ctrl1;
+	int n = CC770_MAX_MSG;
+
+	while (n--) {
+		ctrl0 = cc770_read_reg(priv, msgobj[mo].ctrl0);
+		if (!(ctrl0 & INTPND_SET))
+			break;
+
+		ctrl1 = cc770_read_reg(priv, msgobj[mo].ctrl1);
+		cc770_rx(dev, mo, ctrl1);
+
+		cc770_write_reg(priv, msgobj[mo].ctrl0,
+				MSGVAL_SET | TXIE_RES |
+				RXIE_SET | INTPND_RES);
+		cc770_write_reg(priv, msgobj[mo].ctrl1,
+				NEWDAT_RES | CPUUPD_SET |
+				TXRQST_RES | RMTPND_RES);
+	}
+}
+
+static void cc770_tx_interrupt(struct net_device *dev, unsigned int o)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct net_device_stats *stats = &dev->stats;
+	unsigned int mo = obj2msgobj(o);
+
+	/* Nothing more to send, switch off interrupts */
+	cc770_write_reg(priv, msgobj[mo].ctrl0,
+			MSGVAL_RES | TXIE_RES | RXIE_RES | INTPND_RES);
+	/*
+	 * We had some cases of repeated IRQ so make sure the
+	 * INT is acknowledged
+	 */
+	cc770_write_reg(priv, msgobj[mo].ctrl0,
+			MSGVAL_UNC | TXIE_UNC | RXIE_UNC | INTPND_RES);
+
+	stats->tx_packets++;
+	can_get_echo_skb(dev, 0);
+	netif_wake_queue(dev);
+}
+
+irqreturn_t cc770_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	struct cc770_priv *priv = netdev_priv(dev);
+	u8 intid;
+	int o, n = 0;
+
+	/* Shared interrupts and IRQ off? */
+	if (priv->can.state == CAN_STATE_STOPPED)
+		return IRQ_NONE;
+
+	if (priv->pre_irq)
+		priv->pre_irq(priv);
+
+	while (n < CC770_MAX_IRQ) {
+		/* Read the highest pending interrupt request */
+		intid = cc770_read_reg(priv, interrupt);
+		if (!intid)
+			break;
+		n++;
+
+		if (intid == 1) {
+			/* Exit in case of bus-off */
+			if (cc770_status_interrupt(dev))
+				break;
+		} else {
+			o = intid2obj(intid);
+
+			if (o >= CC770_OBJ_MAX) {
+				netdev_err(dev, "Unexpected interrupt id %d\n",
+					   intid);
+				continue;
+			}
+
+			if (priv->obj_flags[o] & CC770_OBJ_FLAG_RTR)
+				cc770_rtr_interrupt(dev, o);
+			else if (priv->obj_flags[o] & CC770_OBJ_FLAG_RX)
+				cc770_rx_interrupt(dev, o);
+			else
+				cc770_tx_interrupt(dev, o);
+		}
+	}
+
+	if (priv->post_irq)
+		priv->post_irq(priv);
+
+	if (n >= CC770_MAX_IRQ)
+		netdev_dbg(dev, "%d messages handled in ISR", n);
+
+	return (n) ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int cc770_open(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	int err;
+
+	/* set chip into reset mode */
+	set_reset_mode(dev);
+
+	/* common open */
+	err = open_candev(dev);
+	if (err)
+		return err;
+
+	err = request_irq(dev->irq, &cc770_interrupt, priv->irq_flags,
+			  dev->name, dev);
+	if (err) {
+		close_candev(dev);
+		return -EAGAIN;
+	}
+
+	/* init and start chip */
+	cc770_start(dev);
+
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+static int cc770_close(struct net_device *dev)
+{
+	netif_stop_queue(dev);
+	set_reset_mode(dev);
+
+	free_irq(dev->irq, dev);
+	close_candev(dev);
+
+	return 0;
+}
+
+struct net_device *alloc_cc770dev(int sizeof_priv)
+{
+	struct net_device *dev;
+	struct cc770_priv *priv;
+
+	dev = alloc_candev(sizeof(struct cc770_priv) + sizeof_priv,
+			   CC770_ECHO_SKB_MAX);
+	if (!dev)
+		return NULL;
+
+	priv = netdev_priv(dev);
+
+	priv->dev = dev;
+	priv->can.bittiming_const = &cc770_bittiming_const;
+	priv->can.do_set_bittiming = cc770_set_bittiming;
+	priv->can.do_set_mode = cc770_set_mode;
+	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
+
+	memcpy(priv->obj_flags, cc770_obj_flags, sizeof(cc770_obj_flags));
+
+	if (sizeof_priv)
+		priv->priv = (void *)priv + sizeof(struct cc770_priv);
+
+	return dev;
+}
+EXPORT_SYMBOL_GPL(alloc_cc770dev);
+
+void free_cc770dev(struct net_device *dev)
+{
+	free_candev(dev);
+}
+EXPORT_SYMBOL_GPL(free_cc770dev);
+
+static const struct net_device_ops cc770_netdev_ops = {
+	.ndo_open = cc770_open,
+	.ndo_stop = cc770_close,
+	.ndo_start_xmit = cc770_start_xmit,
+};
+
+int register_cc770dev(struct net_device *dev)
+{
+	struct cc770_priv *priv = netdev_priv(dev);
+	int err;
+
+	err = cc770_probe_chip(dev);
+	if (err)
+		return err;
+
+	dev->netdev_ops = &cc770_netdev_ops;
+
+	dev->flags |= IFF_ECHO;	/* we support local echo */
+
+	/* Should we use additional functions? */
+	if (!i82527_compat && priv->control_normal_mode & CTRL_EAF) {
+		priv->can.do_get_berr_counter = cc770_get_berr_counter;
+		priv->control_normal_mode = CTRL_IE | CTRL_EAF | CTRL_EIE;
+		netdev_dbg(dev, "i82527 mode with additional functions\n");
+	} else {
+		priv->control_normal_mode = CTRL_IE | CTRL_EIE;
+		netdev_dbg(dev, "strict i82527 compatibility mode\n");
+	}
+
+	chipset_init(priv);
+	set_reset_mode(dev);
+
+	return register_candev(dev);
+}
+EXPORT_SYMBOL_GPL(register_cc770dev);
+
+void unregister_cc770dev(struct net_device *dev)
+{
+	set_reset_mode(dev);
+	unregister_candev(dev);
+}
+EXPORT_SYMBOL_GPL(unregister_cc770dev);
+
+static __init int cc770_init(void)
+{
+	if (msgobj15_eff) {
+		cc770_obj_flags[CC770_OBJ_RX0] |= CC770_OBJ_FLAG_EFF;
+		cc770_obj_flags[CC770_OBJ_RX1] &= ~CC770_OBJ_FLAG_EFF;
+	}
+
+	pr_info("CAN netdevice driver\n");
+
+	return 0;
+}
+module_init(cc770_init);
+
+static __exit void cc770_exit(void)
+{
+	pr_info("driver removed\n");
+}
+module_exit(cc770_exit);
diff --git a/drivers/net/can/cc770/cc770.h b/drivers/net/can/cc770/cc770.h
new file mode 100644
index 0000000..a1739db
--- /dev/null
+++ b/drivers/net/can/cc770/cc770.h
@@ -0,0 +1,203 @@
+/*
+ * Core driver for the CC770 and AN82527 CAN controllers
+ *
+ * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * 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.
+ */
+
+#ifndef CC770_DEV_H
+#define CC770_DEV_H
+
+#include <linux/can/dev.h>
+
+struct cc770_msgobj {
+	u8 ctrl0;
+	u8 ctrl1;
+	u8 id[4];
+	u8 config;
+	u8 data[8];
+	u8 dontuse;		/* padding */
+} __packed;
+
+struct cc770_regs {
+	union {
+		struct cc770_msgobj msgobj[16]; /* Message object 1..15 */
+		struct {
+			u8 control;		/* Control Register */
+			u8 status;		/* Status Register */
+			u8 cpu_interface;	/* CPU Interface Register */
+			u8 dontuse1;
+			u8 high_speed_read[2];	/* High Speed Read */
+			u8 global_mask_std[2];	/* Standard Global Mask */
+			u8 global_mask_ext[4];	/* Extended Global Mask */
+			u8 msg15_mask[4];	/* Message 15 Mask */
+			u8 dontuse2[15];
+			u8 clkout;		/* Clock Out Register */
+			u8 dontuse3[15];
+			u8 bus_config;		/* Bus Configuration Register */
+			u8 dontuse4[15];
+			u8 bit_timing_0;	/* Bit Timing Register byte 0 */
+			u8 dontuse5[15];
+			u8 bit_timing_1;	/* Bit Timing Register byte 1 */
+			u8 dontuse6[15];
+			u8 interrupt;		/* Interrupt Register */
+			u8 dontuse7[15];
+			u8 rx_error_counter;	/* Receive Error Counter */
+			u8 dontuse8[15];
+			u8 tx_error_counter;	/* Transmit Error Counter */
+			u8 dontuse9[31];
+			u8 p1_conf;
+			u8 dontuse10[15];
+			u8 p2_conf;
+			u8 dontuse11[15];
+			u8 p1_in;
+			u8 dontuse12[15];
+			u8 p2_in;
+			u8 dontuse13[15];
+			u8 p1_out;
+			u8 dontuse14[15];
+			u8 p2_out;
+			u8 dontuse15[15];
+			u8 serial_reset_addr;
+		};
+	};
+} __packed;
+
+/* Control Register (0x00) */
+#define CTRL_INI	0x01	/* Initialization */
+#define CTRL_IE		0x02	/* Interrupt Enable */
+#define CTRL_SIE	0x04	/* Status Interrupt Enable */
+#define CTRL_EIE	0x08	/* Error Interrupt Enable */
+#define CTRL_EAF	0x20	/* Enable additional functions */
+#define CTRL_CCE	0x40	/* Change Configuration Enable */
+
+/* Status Register (0x01) */
+#define STAT_LEC_STUFF	0x01	/* Stuff error */
+#define STAT_LEC_FORM	0x02	/* Form error */
+#define STAT_LEC_ACK	0x03	/* Acknowledgement error */
+#define STAT_LEC_BIT1	0x04	/* Bit1 error */
+#define STAT_LEC_BIT0	0x05	/* Bit0 error */
+#define STAT_LEC_CRC	0x06	/* CRC error */
+#define STAT_LEC_MASK	0x07	/* Last Error Code mask */
+#define STAT_TXOK	0x08	/* Transmit Message Successfully */
+#define STAT_RXOK	0x10	/* Receive Message Successfully */
+#define STAT_WAKE	0x20	/* Wake Up Status */
+#define STAT_WARN	0x40	/* Warning Status */
+#define STAT_BOFF	0x80	/* Bus Off Status */
+
+/*
+ * CPU Interface Register (0x02)
+ * Clock Out Register (0x1f)
+ * Bus Configuration Register (0x2f)
+ *
+ * see include/linux/can/platform/cc770.h
+ */
+
+/* Message Control Register 0 (Base Address + 0x0) */
+#define INTPND_RES	0x01	/* No Interrupt pending */
+#define INTPND_SET	0x02	/* Interrupt pending */
+#define INTPND_UNC	0x03
+#define RXIE_RES	0x04	/* Receive Interrupt Disable */
+#define RXIE_SET	0x08	/* Receive Interrupt Enable */
+#define RXIE_UNC	0x0c
+#define TXIE_RES	0x10	/* Transmit Interrupt Disable */
+#define TXIE_SET	0x20	/* Transmit Interrupt Enable */
+#define TXIE_UNC	0x30
+#define MSGVAL_RES	0x40	/* Message Invalid */
+#define MSGVAL_SET	0x80	/* Message Valid */
+#define MSGVAL_UNC	0xc0
+
+/* Message Control Register 1 (Base Address + 0x01) */
+#define NEWDAT_RES	0x01	/* No New Data */
+#define NEWDAT_SET	0x02	/* New Data */
+#define NEWDAT_UNC	0x03
+#define MSGLST_RES	0x04	/* No Message Lost */
+#define MSGLST_SET	0x08	/* Message Lost */
+#define MSGLST_UNC	0x0c
+#define CPUUPD_RES	0x04	/* No CPU Updating */
+#define CPUUPD_SET	0x08	/* CPU Updating */
+#define CPUUPD_UNC	0x0c
+#define TXRQST_RES	0x10	/* No Transmission Request */
+#define TXRQST_SET	0x20	/* Transmission Request */
+#define TXRQST_UNC	0x30
+#define RMTPND_RES	0x40	/* No Remote Request Pending */
+#define RMTPND_SET	0x80	/* Remote Request Pending */
+#define RMTPND_UNC	0xc0
+
+/* Message Configuration Register (Base Address + 0x06) */
+#define MSGCFG_XTD	0x04	/* Extended Identifier */
+#define MSGCFG_DIR	0x08	/* Direction is Transmit */
+
+#define MSGOBJ_FIRST	1
+#define MSGOBJ_LAST	15
+
+#define CC770_IO_SIZE	0x100
+#define CC770_MAX_IRQ	20	/* max. number of interrupts handled in ISR */
+#define CC770_MAX_MSG	4	/* max. number of messages handled in ISR */
+
+#define CC770_ECHO_SKB_MAX	1
+
+#define cc770_read_reg(priv, member)					\
+	priv->read_reg(priv, offsetof(struct cc770_regs, member))
+
+#define cc770_write_reg(priv, member, value)				\
+	priv->write_reg(priv, offsetof(struct cc770_regs, member), value)
+
+/*
+ * Message objects and flags used by this driver
+ */
+#define CC770_OBJ_FLAG_RX	0x01
+#define CC770_OBJ_FLAG_RTR	0x02
+#define CC770_OBJ_FLAG_EFF	0x04
+
+enum {
+	CC770_OBJ_RX0 = 0,	/* for receiving normal messages */
+	CC770_OBJ_RX1,		/* for receiving normal messages */
+	CC770_OBJ_RX_RTR0,	/* for receiving remote transmission requests */
+	CC770_OBJ_RX_RTR1,	/* for receiving remote transmission requests */
+	CC770_OBJ_TX,		/* for sending messages */
+	CC770_OBJ_MAX
+};
+
+#define obj2msgobj(o)	(MSGOBJ_LAST - (o)) /* message object 11..15 */
+
+/*
+ * CC770 private data structure
+ */
+struct cc770_priv {
+	struct can_priv can;	/* must be the first member */
+	struct sk_buff *echo_skb;
+
+	/* the lower-layer is responsible for appropriate locking */
+	u8 (*read_reg)(const struct cc770_priv *priv, int reg);
+	void (*write_reg)(const struct cc770_priv *priv, int reg, u8 val);
+	void (*pre_irq)(const struct cc770_priv *priv);
+	void (*post_irq)(const struct cc770_priv *priv);
+
+	void *priv;		/* for board-specific data */
+	struct net_device *dev;
+
+	void __iomem *reg_base;	 /* ioremap'ed address to registers */
+	unsigned long irq_flags; /* for request_irq() */
+
+	unsigned char obj_flags[CC770_OBJ_MAX];
+	u8 control_normal_mode;	/* Control register for normal mode */
+	u8 cpu_interface;	/* CPU interface register */
+	u8 clkout;		/* Clock out register */
+	u8 bus_config;		/* Bus conffiguration register */
+};
+
+struct net_device *alloc_cc770dev(int sizeof_priv);
+void free_cc770dev(struct net_device *dev);
+int register_cc770dev(struct net_device *dev);
+void unregister_cc770dev(struct net_device *dev);
+
+#endif /* CC770_DEV_H */
diff --git a/include/linux/can/platform/cc770.h b/include/linux/can/platform/cc770.h
new file mode 100644
index 0000000..7702641
--- /dev/null
+++ b/include/linux/can/platform/cc770.h
@@ -0,0 +1,33 @@
+#ifndef _CAN_PLATFORM_CC770_H_
+#define _CAN_PLATFORM_CC770_H_
+
+/* CPU Interface Register (0x02) */
+#define CPUIF_CEN	0x01	/* Clock Out Enable */
+#define CPUIF_MUX	0x04	/* Multiplex */
+#define CPUIF_SLP	0x08	/* Sleep */
+#define CPUIF_PWD	0x10	/* Power Down Mode */
+#define CPUIF_DMC	0x20	/* Divide Memory Clock */
+#define CPUIF_DSC	0x40	/* Divide System Clock */
+#define CPUIF_RST	0x80	/* Hardware Reset Status */
+
+/* Clock Out Register (0x1f) */
+#define CLKOUT_CD_MASK  0x0f	/* Clock Divider mask */
+#define CLKOUT_SL_MASK	0x30	/* Slew Rate mask */
+#define CLKOUT_SL_SHIFT	4
+
+/* Bus Configuration Register (0x2f) */
+#define BUSCFG_DR0	0x01	/* Disconnect RX0 Input / Select RX input */
+#define BUSCFG_DR1	0x02	/* Disconnect RX1 Input / Silent mode */
+#define BUSCFG_DT1	0x08	/* Disconnect TX1 Output */
+#define BUSCFG_POL	0x20	/* Polarity dominant or recessive */
+#define BUSCFG_CBY	0x40	/* Input Comparator Bypass */
+
+struct cc770_platform_data {
+	u32 osc_freq;	/* CAN bus oscillator frequency in Hz */
+
+	u8 cir;		/* CPU Interface Register */
+	u8 cor;		/* Clock Out Register */
+	u8 bcr;		/* Bus Configuration Register */
+};
+
+#endif	/* !_CAN_PLATFORM_CC770_H_ */
-- 
1.7.4.1

[PATCH net-next v6 2/4] can: cc770: add legacy ISA bus driver for the CC770 and AN82527

[Wolfgang Grandegger]

This patch adds support for legacy Bosch CC770 and Intel AN82527 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 cc770_isa.ko port=0x310,0x380 irq=7,11

for ISA devices using I/O ports or:

  insmod cc770_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 cc770_isa.ko port=0x310,0x380 indirect=1 irq=7,11

Furthermore, the following mode parameter can be defined:

  clk: External oscillator clock frequency (default=16000000 [16 MHz])
  cir: CPU interface register (default=0x40 [DSC])
  bcr: Bus configuration register (default=0x40 [CBY])
  cor: Clockout register (default=0x00)

Note: for clk, cir, bcr and cor, the first argument re-defines the
default for all other devices, e.g.:

  insmod cc770_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000

is equivalent to

  insmod cc770_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000,24000000

Signed-off-by: Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
Acked-by: Marc Kleine-Budde <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/net/can/cc770/Kconfig     |   11 +
 drivers/net/can/cc770/Makefile    |    1 +
 drivers/net/can/cc770/cc770_isa.c |  367 +++++++++++++++++++++++++++++++++++++
 3 files changed, 379 insertions(+), 0 deletions(-)
 create mode 100644 drivers/net/can/cc770/cc770_isa.c

diff --git a/drivers/net/can/cc770/Kconfig b/drivers/net/can/cc770/Kconfig
index 225131b..28e4d48 100644
--- a/drivers/net/can/cc770/Kconfig
+++ b/drivers/net/can/cc770/Kconfig
@@ -1,3 +1,14 @@
 menuconfig CAN_CC770
 	tristate "Bosch CC770 and Intel AN82527 devices"
 	depends on CAN_DEV && HAS_IOMEM
+
+if CAN_CC770
+
+config CAN_CC770_ISA
+	tristate "ISA Bus based legacy CC770 driver"
+	---help---
+	  This driver adds legacy support for CC770 and AN82527 chips
+	  connected to the ISA bus using I/O port, memory mapped or
+	  indirect access.
+
+endif
diff --git a/drivers/net/can/cc770/Makefile b/drivers/net/can/cc770/Makefile
index 34e8180..872ecff 100644
--- a/drivers/net/can/cc770/Makefile
+++ b/drivers/net/can/cc770/Makefile
@@ -3,5 +3,6 @@
 #
 
 obj-$(CONFIG_CAN_CC770) += cc770.o
+obj-$(CONFIG_CAN_CC770_ISA) += cc770_isa.o
 
 ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/cc770/cc770_isa.c b/drivers/net/can/cc770/cc770_isa.c
new file mode 100644
index 0000000..4be5fe2
--- /dev/null
+++ b/drivers/net/can/cc770/cc770_isa.c
@@ -0,0 +1,367 @@
+/*
+ * Driver for CC770 and AN82527 CAN controllers on the legacy ISA bus
+ *
+ * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
+ *
+ * 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.
+ */
+
+/*
+ * Bosch CC770 and Intel AN82527 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 cc770_isa.ko port=0x310,0x380 irq=7,11
+ *
+ * for ISA devices using I/O ports or:
+ *
+ *   insmod cc770_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 cc770_isa.ko port=0x310,0x380 indirect=1 irq=7,11
+ *
+ * Furthermore, the following mode parameter can be defined:
+ *
+ *   clk: External oscillator clock frequency (default=16000000 [16 MHz])
+ *   cir: CPU interface register (default=0x40 [DSC])
+ *   bcr: Bus configuration register (default=0x40 [CBY])
+ *   cor: Clockout register (default=0x00)
+ *
+ * Note: for clk, cir, bcr and cor, the first argument re-defines the
+ * default for all other devices, e.g.:
+ *
+ *   insmod cc770_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000
+ *
+ * is equivalent to
+ *
+ *   insmod cc770_isa.ko mem=0xd1000,0xd1000 irq=7,11 clk=24000000,24000000
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/cc770.h>
+
+#include "cc770.h"
+
+#define MAXDEV 8
+
+MODULE_AUTHOR("Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>");
+MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the ISA bus");
+MODULE_LICENSE("GPL v2");
+
+#define CLK_DEFAULT	16000000	/* 16 MHz */
+#define COR_DEFAULT	0x00
+#define BCR_DEFAULT	BUSCFG_CBY
+
+static unsigned long port[MAXDEV];
+static unsigned long mem[MAXDEV];
+static int __devinitdata irq[MAXDEV];
+static int __devinitdata clk[MAXDEV];
+static u8 __devinitdata cir[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
+static u8 __devinitdata cor[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
+static u8 __devinitdata bcr[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
+static int __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, int, 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(cir, byte, NULL, S_IRUGO);
+MODULE_PARM_DESC(cir, "CPU interface register (default=0x40 [DSC])");
+
+module_param_array(cor, byte, NULL, S_IRUGO);
+MODULE_PARM_DESC(cor, "Clockout register (default=0x00)");
+
+module_param_array(bcr, byte, NULL, S_IRUGO);
+MODULE_PARM_DESC(bcr, "Bus configuration register (default=0x40 [CBY])");
+
+#define CC770_IOSIZE          0x20
+#define CC770_IOSIZE_INDIRECT 0x02
+
+static struct platform_device *cc770_isa_devs[MAXDEV];
+
+static u8 cc770_isa_mem_read_reg(const struct cc770_priv *priv, int reg)
+{
+	return readb(priv->reg_base + reg);
+}
+
+static void cc770_isa_mem_write_reg(const struct cc770_priv *priv,
+				      int reg, u8 val)
+{
+	writeb(val, priv->reg_base + reg);
+}
+
+static u8 cc770_isa_port_read_reg(const struct cc770_priv *priv, int reg)
+{
+	return inb((unsigned long)priv->reg_base + reg);
+}
+
+static void cc770_isa_port_write_reg(const struct cc770_priv *priv,
+				       int reg, u8 val)
+{
+	outb(val, (unsigned long)priv->reg_base + reg);
+}
+
+static u8 cc770_isa_port_read_reg_indirect(const struct cc770_priv *priv,
+					     int reg)
+{
+	unsigned long base = (unsigned long)priv->reg_base;
+
+	outb(reg, base);
+	return inb(base + 1);
+}
+
+static void cc770_isa_port_write_reg_indirect(const struct cc770_priv *priv,
+						int reg, u8 val)
+{
+	unsigned long base = (unsigned long)priv->reg_base;
+
+	outb(reg, base);
+	outb(val, base + 1);
+}
+
+static int __devinit cc770_isa_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct cc770_priv *priv;
+	void __iomem *base = NULL;
+	int iosize = CC770_IOSIZE;
+	int idx = pdev->id;
+	int err;
+	u32 clktmp;
+
+	dev_dbg(&pdev->dev, "probing idx=%d: port=%#lx, mem=%#lx, irq=%d\n",
+		idx, port[idx], mem[idx], irq[idx]);
+	if (mem[idx]) {
+		if (!request_mem_region(mem[idx], iosize, KBUILD_MODNAME)) {
+			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 = CC770_IOSIZE_INDIRECT;
+		if (!request_region(port[idx], iosize, KBUILD_MODNAME)) {
+			err = -EBUSY;
+			goto exit;
+		}
+	}
+
+	dev = alloc_cc770dev(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 = cc770_isa_mem_read_reg;
+		priv->write_reg = cc770_isa_mem_write_reg;
+	} else {
+		priv->reg_base = (void __iomem *)port[idx];
+		dev->base_addr = port[idx];
+
+		if (iosize == CC770_IOSIZE_INDIRECT) {
+			priv->read_reg = cc770_isa_port_read_reg_indirect;
+			priv->write_reg = cc770_isa_port_write_reg_indirect;
+		} else {
+			priv->read_reg = cc770_isa_port_read_reg;
+			priv->write_reg = cc770_isa_port_write_reg;
+		}
+	}
+
+	if (clk[idx])
+		clktmp = clk[idx];
+	else if (clk[0])
+		clktmp = clk[0];
+	else
+		clktmp = CLK_DEFAULT;
+	priv->can.clock.freq = clktmp;
+
+	if (cir[idx] != 0xff) {
+		priv->cpu_interface = cir[idx];
+	} else if (cir[0] != 0xff) {
+		priv->cpu_interface = cir[0];
+	} else {
+		/* The system clock may not exceed 10 MHz */
+		if (clktmp > 10000000) {
+			priv->cpu_interface |= CPUIF_DSC;
+			clktmp /= 2;
+		}
+		/* The memory clock may not exceed 8 MHz */
+		if (clktmp > 8000000)
+			priv->cpu_interface |= CPUIF_DMC;
+	}
+
+	if (priv->cpu_interface & CPUIF_DSC)
+		priv->can.clock.freq /= 2;
+
+	if (bcr[idx] != 0xff)
+		priv->bus_config = bcr[idx];
+	else if (bcr[0] != 0xff)
+		priv->bus_config = bcr[0];
+	else
+		priv->bus_config = BCR_DEFAULT;
+
+	if (cor[idx] != 0xff)
+		priv->clkout = cor[idx];
+	else if (cor[0] != 0xff)
+		priv->clkout = cor[0];
+	else
+		priv->clkout = COR_DEFAULT;
+
+	dev_set_drvdata(&pdev->dev, dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	err = register_cc770dev(dev);
+	if (err) {
+		dev_err(&pdev->dev,
+			"couldn't register device (err=%d)\n", err);
+		goto exit_unmap;
+	}
+
+	dev_info(&pdev->dev, "device registered (reg_base=0x%p, irq=%d)\n",
+		 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 cc770_isa_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = dev_get_drvdata(&pdev->dev);
+	struct cc770_priv *priv = netdev_priv(dev);
+	int idx = pdev->id;
+
+	unregister_cc770dev(dev);
+	dev_set_drvdata(&pdev->dev, NULL);
+
+	if (mem[idx]) {
+		iounmap(priv->reg_base);
+		release_mem_region(mem[idx], CC770_IOSIZE);
+	} else {
+		if (priv->read_reg == cc770_isa_port_read_reg_indirect)
+			release_region(port[idx], CC770_IOSIZE_INDIRECT);
+		else
+			release_region(port[idx], CC770_IOSIZE);
+	}
+	free_cc770dev(dev);
+
+	return 0;
+}
+
+static struct platform_driver cc770_isa_driver = {
+	.probe = cc770_isa_probe,
+	.remove = __devexit_p(cc770_isa_remove),
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init cc770_isa_init(void)
+{
+	int idx, err;
+
+	for (idx = 0; idx < ARRAY_SIZE(cc770_isa_devs); idx++) {
+		if ((port[idx] || mem[idx]) && irq[idx]) {
+			cc770_isa_devs[idx] =
+				platform_device_alloc(KBUILD_MODNAME, idx);
+			if (!cc770_isa_devs[idx]) {
+				err = -ENOMEM;
+				goto exit_free_devices;
+			}
+			err = platform_device_add(cc770_isa_devs[idx]);
+			if (err) {
+				platform_device_put(cc770_isa_devs[idx]);
+				goto exit_free_devices;
+			}
+			pr_debug("platform device %d: port=%#lx, mem=%#lx, "
+				 "irq=%d\n",
+				 idx, port[idx], mem[idx], irq[idx]);
+		} else if (idx == 0 || port[idx] || mem[idx]) {
+			pr_err("insufficient parameters supplied\n");
+			err = -EINVAL;
+			goto exit_free_devices;
+		}
+	}
+
+	err = platform_driver_register(&cc770_isa_driver);
+	if (err)
+		goto exit_free_devices;
+
+	pr_info("driver for max. %d devices registered\n", MAXDEV);
+
+	return 0;
+
+exit_free_devices:
+	while (--idx >= 0) {
+		if (cc770_isa_devs[idx])
+			platform_device_unregister(cc770_isa_devs[idx]);
+	}
+
+	return err;
+}
+module_init(cc770_isa_init);
+
+static void __exit cc770_isa_exit(void)
+{
+	int idx;
+
+	platform_driver_unregister(&cc770_isa_driver);
+	for (idx = 0; idx < ARRAY_SIZE(cc770_isa_devs); idx++) {
+		if (cc770_isa_devs[idx])
+			platform_device_unregister(cc770_isa_devs[idx]);
+	}
+}
+module_exit(cc770_isa_exit);
-- 
1.7.4.1

[PATCH net-next v6 3/4] can: cc770: add platform bus driver for the CC770 and AN82527

[Wolfgang Grandegger]

This driver works with both, static platform data and device tree
bindings. It has been tested on a TQM855L board with two AN82527
CAN controllers on the local bus.

CC: Devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
CC: linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org
CC: Kumar Gala <galak-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
Signed-off-by: Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
Acked-by: Marc Kleine-Budde <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 .../devicetree/bindings/net/can/cc770.txt          |   53 ++++
 drivers/net/can/cc770/Kconfig                      |    7 +
 drivers/net/can/cc770/Makefile                     |    1 +
 drivers/net/can/cc770/cc770_platform.c             |  272 ++++++++++++++++++++
 4 files changed, 333 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/cc770.txt
 create mode 100644 drivers/net/can/cc770/cc770_platform.c

diff --git a/Documentation/devicetree/bindings/net/can/cc770.txt b/Documentation/devicetree/bindings/net/can/cc770.txt
new file mode 100644
index 0000000..77027bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/cc770.txt
@@ -0,0 +1,53 @@
+Memory mapped Bosch CC770 and Intel AN82527 CAN controller
+
+Note: The CC770 is a CAN controller from Bosch, which is 100%
+compatible with the old AN82527 from Intel, but with "bugs" being fixed.
+
+Required properties:
+
+- compatible : should be "bosch,cc770" for the CC770 and "intc,82527"
+	for the AN82527.
+
+- reg : should specify the chip select, address offset and size required
+	to map the registers of the controller. The size is usually 0x80.
+
+- interrupts : property with a value describing the interrupt source
+	(number and sensitivity) required for the controller.
+
+Optional properties:
+
+- bosch,external-clock-frequency : frequency of the external oscillator
+	clock in Hz. Note that the internal clock frequency used by the
+	controller is half of that value. If not specified, a default
+	value of 16000000 (16 MHz) is used.
+
+- bosch,clock-out-frequency : slock frequency in Hz on the CLKOUT pin.
+	If not specified or if the specified value is 0, the CLKOUT pin
+	will be disabled.
+
+- bosch,slew-rate : slew rate of the CLKOUT signal. If not specified,
+	a resonable value will be calculated.
+
+- bosch,disconnect-rx0-input : see data sheet.
+
+- bosch,disconnect-rx1-input : see data sheet.
+
+- bosch,disconnect-tx1-output : see data sheet.
+
+- bosch,polarity-dominant : see data sheet.
+
+- bosch,divide-memory-clock : see data sheet.
+
+- bosch,iso-low-speed-mux : see data sheet.
+
+For further information, please have a look to the CC770 or AN82527.
+
+Examples:
+
+can@3,100 {
+	compatible = "bosch,cc770";
+	reg = <3 0x100 0x80>;
+	interrupts = <2 0>;
+	interrupt-parent = <&mpic>;
+	bosch,external-clock-frequency = <16000000>;
+};
diff --git a/drivers/net/can/cc770/Kconfig b/drivers/net/can/cc770/Kconfig
index 28e4d48..22c07a8 100644
--- a/drivers/net/can/cc770/Kconfig
+++ b/drivers/net/can/cc770/Kconfig
@@ -11,4 +11,11 @@ config CAN_CC770_ISA
 	  connected to the ISA bus using I/O port, memory mapped or
 	  indirect access.
 
+config CAN_CC770_PLATFORM
+	tristate "Generic Platform Bus based CC770 driver"
+	---help---
+	  This driver adds support for the CC770 and AN82527 chips
+	  connected to the "platform bus" (Linux abstraction for directly
+	  to the processor attached devices).
+
 endif
diff --git a/drivers/net/can/cc770/Makefile b/drivers/net/can/cc770/Makefile
index 872ecff..9fb8321 100644
--- a/drivers/net/can/cc770/Makefile
+++ b/drivers/net/can/cc770/Makefile
@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_CAN_CC770) += cc770.o
 obj-$(CONFIG_CAN_CC770_ISA) += cc770_isa.o
+obj-$(CONFIG_CAN_CC770_PLATFORM) += cc770_platform.o
 
 ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/cc770/cc770_platform.c b/drivers/net/can/cc770/cc770_platform.c
new file mode 100644
index 0000000..53115ee
--- /dev/null
+++ b/drivers/net/can/cc770/cc770_platform.c
@@ -0,0 +1,272 @@
+/*
+ * Driver for CC770 and AN82527 CAN controllers on the platform bus
+ *
+ * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
+ *
+ * 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.
+ */
+
+/*
+ * If platform data are used you should have similar definitions
+ * in your board-specific code:
+ *
+ *   static struct cc770_platform_data myboard_cc770_pdata = {
+ *           .osc_freq = 16000000,
+ *           .cir = 0x41,
+ *           .cor = 0x20,
+ *           .bcr = 0x40,
+ *   };
+ *
+ * Please see include/linux/can/platform/cc770.h for description of
+ * above fields.
+ *
+ * If the device tree is used, you need a CAN node definition in your
+ * DTS file similar to:
+ *
+ *   can@3,100 {
+ *           compatible = "bosch,cc770";
+ *           reg = <3 0x100 0x80>;
+ *           interrupts = <2 0>;
+ *           interrupt-parent = <&mpic>;
+ *           bosch,external-clock-frequency = <16000000>;
+ *   };
+ *
+ * See "Documentation/devicetree/bindings/net/can/cc770.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/platform_device.h>
+#include <linux/of.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/cc770.h>
+
+#include "cc770.h"
+
+#define DRV_NAME "cc770_platform"
+
+MODULE_AUTHOR("Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>");
+MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the platform bus");
+MODULE_LICENSE("GPL v2");
+
+#define CC770_PLATFORM_CAN_CLOCK  16000000
+
+static u8 cc770_platform_read_reg(const struct cc770_priv *priv, int reg)
+{
+	return ioread8(priv->reg_base + reg);
+}
+
+static void cc770_platform_write_reg(const struct cc770_priv *priv, int reg,
+				     u8 val)
+{
+	iowrite8(val, priv->reg_base + reg);
+}
+
+static int __devinit cc770_get_of_node_data(struct platform_device *pdev,
+					    struct cc770_priv *priv)
+{
+	struct device_node *np = pdev->dev.of_node;
+	const u32 *prop;
+	int prop_size;
+	u32 clkext;
+
+	prop = of_get_property(np, "bosch,external-clock-frequency",
+			       &prop_size);
+	if (prop && (prop_size ==  sizeof(u32)))
+		clkext = *prop;
+	else
+		clkext = CC770_PLATFORM_CAN_CLOCK; /* default */
+	priv->can.clock.freq = clkext;
+
+	/* The system clock may not exceed 10 MHz */
+	if (priv->can.clock.freq > 10000000) {
+		priv->cpu_interface |= CPUIF_DSC;
+		priv->can.clock.freq /= 2;
+	}
+
+	/* The memory clock may not exceed 8 MHz */
+	if (priv->can.clock.freq > 8000000)
+		priv->cpu_interface |= CPUIF_DMC;
+
+	if (of_get_property(np, "bosch,divide-memory-clock", NULL))
+		priv->cpu_interface |= CPUIF_DMC;
+	if (of_get_property(np, "bosch,iso-low-speed-mux", NULL))
+		priv->cpu_interface |= CPUIF_MUX;
+
+	if (!of_get_property(np, "bosch,no-comperator-bypass", NULL))
+		priv->bus_config |= BUSCFG_CBY;
+	if (of_get_property(np, "bosch,disconnect-rx0-input", NULL))
+		priv->bus_config |= BUSCFG_DR0;
+	if (of_get_property(np, "bosch,disconnect-rx1-input", NULL))
+		priv->bus_config |= BUSCFG_DR1;
+	if (of_get_property(np, "bosch,disconnect-tx1-output", NULL))
+		priv->bus_config |= BUSCFG_DT1;
+	if (of_get_property(np, "bosch,polarity-dominant", NULL))
+		priv->bus_config |= BUSCFG_POL;
+
+	prop = of_get_property(np, "bosch,clock-out-frequency", &prop_size);
+	if (prop && (prop_size == sizeof(u32)) && *prop > 0) {
+		u32 cdv = clkext / *prop;
+		int slew;
+
+		if (cdv > 0 && cdv < 16) {
+			priv->cpu_interface |= CPUIF_CEN;
+			priv->clkout |= (cdv - 1) & CLKOUT_CD_MASK;
+
+			prop = of_get_property(np, "bosch,slew-rate",
+					       &prop_size);
+			if (prop && (prop_size == sizeof(u32))) {
+				slew = *prop;
+			} else {
+				/* Determine default slew rate */
+				slew = (CLKOUT_SL_MASK >>
+					CLKOUT_SL_SHIFT) -
+					((cdv * clkext - 1) / 8000000);
+				if (slew < 0)
+					slew = 0;
+			}
+			priv->clkout |= (slew << CLKOUT_SL_SHIFT) &
+				CLKOUT_SL_MASK;
+		} else {
+			dev_dbg(&pdev->dev, "invalid clock-out-frequency\n");
+		}
+	}
+
+	return 0;
+}
+
+static int __devinit cc770_get_platform_data(struct platform_device *pdev,
+					     struct cc770_priv *priv)
+{
+
+	struct cc770_platform_data *pdata = pdev->dev.platform_data;
+
+	priv->can.clock.freq = pdata->osc_freq;
+	if (priv->cpu_interface | CPUIF_DSC)
+		priv->can.clock.freq /= 2;
+	priv->clkout = pdata->cor;
+	priv->bus_config = pdata->bcr;
+	priv->cpu_interface = pdata->cir;
+
+	return 0;
+}
+
+static int __devinit cc770_platform_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct cc770_priv *priv;
+	struct resource *mem;
+	resource_size_t mem_size;
+	void __iomem *base;
+	int err, irq;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!mem || irq <= 0)
+		return -ENODEV;
+
+	mem_size = resource_size(mem);
+	if (!request_mem_region(mem->start, mem_size, pdev->name))
+		return -EBUSY;
+
+	base = ioremap(mem->start, mem_size);
+	if (!base) {
+		err = -ENOMEM;
+		goto exit_release_mem;
+	}
+
+	dev = alloc_cc770dev(0);
+	if (!dev) {
+		err = -ENOMEM;
+		goto exit_unmap_mem;
+	}
+
+	dev->irq = irq;
+	priv = netdev_priv(dev);
+	priv->read_reg = cc770_platform_read_reg;
+	priv->write_reg = cc770_platform_write_reg;
+	priv->irq_flags = IRQF_SHARED;
+	priv->reg_base = base;
+
+	if (pdev->dev.of_node)
+		err = cc770_get_of_node_data(pdev, priv);
+	else if (pdev->dev.platform_data)
+		err = cc770_get_platform_data(pdev, priv);
+	else
+		err = -ENODEV;
+	if (err)
+		goto exit_free_cc770;
+
+	dev_dbg(&pdev->dev,
+		 "reg_base=0x%p irq=%d clock=%d cpu_interface=0x%02x "
+		 "bus_config=0x%02x clkout=0x%02x\n",
+		 priv->reg_base, dev->irq, priv->can.clock.freq,
+		 priv->cpu_interface, priv->bus_config, priv->clkout);
+
+	dev_set_drvdata(&pdev->dev, dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	err = register_cc770dev(dev);
+	if (err) {
+		dev_err(&pdev->dev,
+			"couldn't register CC700 device (err=%d)\n", err);
+		goto exit_free_cc770;
+	}
+
+	return 0;
+
+exit_free_cc770:
+	free_cc770dev(dev);
+exit_unmap_mem:
+	iounmap(base);
+exit_release_mem:
+	release_mem_region(mem->start, mem_size);
+
+	return err;
+}
+
+static int __devexit cc770_platform_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = dev_get_drvdata(&pdev->dev);
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct resource *mem;
+
+	unregister_cc770dev(dev);
+	iounmap(priv->reg_base);
+	free_cc770dev(dev);
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	release_mem_region(mem->start, resource_size(mem));
+
+	return 0;
+}
+
+static struct of_device_id __devinitdata cc770_platform_table[] = {
+	{.compatible = "bosch,cc770"}, /* CC770 from Bosch */
+	{.compatible = "intc,82527"},  /* AN82527 from Intel CP */
+	{},
+};
+
+static struct platform_driver cc770_platform_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = cc770_platform_table,
+	},
+	.probe = cc770_platform_probe,
+	.remove = __devexit_p(cc770_platform_remove),
+};
+
+module_platform_driver(cc770_platform_driver);
-- 
1.7.4.1

[PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Wolfgang Grandegger]

This patch enables or updates support for the CC770 and AN82527
CAN controller on the TQM8548 and TQM8xx boards.

CC: devicetree-discuss@lists.ozlabs.org
CC: linuxppc-dev@ozlabs.org
CC: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
---
 arch/powerpc/boot/dts/tqm8548-bigflash.dts |   19 ++++++++++++++-----
 arch/powerpc/boot/dts/tqm8548.dts          |   19 ++++++++++++++-----
 arch/powerpc/boot/dts/tqm8xx.dts           |   25 +++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/boot/dts/tqm8548-bigflash.dts b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
index 9452c3c..d918752 100644
--- a/arch/powerpc/boot/dts/tqm8548-bigflash.dts
+++ b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
@@ -352,7 +352,7 @@
 		ranges = <
 			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
 			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
-			2 0x0 0xa3000000 0x00008000	// CAN (2 x i82527)
+			2 0x0 0xa3000000 0x00008000	// CAN (2 x CC770)
 			3 0x0 0xa3010000 0x00008000	// NAND FLASH
 
 		>;
@@ -393,18 +393,27 @@
 		};
 
 		/* Note: CAN support needs be enabled in U-Boot */
-		can0@2,0 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,0 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x0 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
 		};
 
-		can1@2,100 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,100 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x100 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
 		};
 
 		/* Note: NAND support needs to be enabled in U-Boot */
diff --git a/arch/powerpc/boot/dts/tqm8548.dts b/arch/powerpc/boot/dts/tqm8548.dts
index 619776f..988d887 100644
--- a/arch/powerpc/boot/dts/tqm8548.dts
+++ b/arch/powerpc/boot/dts/tqm8548.dts
@@ -352,7 +352,7 @@
 		ranges = <
 			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
 			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
-			2 0x0 0xe3000000 0x00008000	// CAN (2 x i82527)
+			2 0x0 0xe3000000 0x00008000	// CAN (2 x CC770)
 			3 0x0 0xe3010000 0x00008000	// NAND FLASH
 
 		>;
@@ -393,18 +393,27 @@
 		};
 
 		/* Note: CAN support needs be enabled in U-Boot */
-		can0@2,0 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,0 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x0 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
 		};
 
-		can1@2,100 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,100 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x100 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
 		};
 
 		/* Note: NAND support needs to be enabled in U-Boot */
diff --git a/arch/powerpc/boot/dts/tqm8xx.dts b/arch/powerpc/boot/dts/tqm8xx.dts
index f6da7ec..c3dba25 100644
--- a/arch/powerpc/boot/dts/tqm8xx.dts
+++ b/arch/powerpc/boot/dts/tqm8xx.dts
@@ -57,6 +57,7 @@
 
 		ranges = <
 			0x0 0x0 0x40000000 0x800000
+			0x3 0x0 0xc0000000 0x200
 		>;
 
 		flash@0,0 {
@@ -67,6 +68,30 @@
 			bank-width = <4>;
 			device-width = <2>;
 		};
+
+		/* Note: CAN support needs be enabled in U-Boot */
+		can@3,0 {
+			compatible = "intc,82527";
+			reg = <3 0x0 0x80>;
+			interrupts = <8 1>;
+			interrupt-parent = <&PIC>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
+		};
+
+		can@3,100 {
+			compatible = "intc,82527";
+			reg = <3 0x100 0x80>;
+			interrupts = <8 1>;
+			interrupt-parent = <&PIC>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+		};
 	};
 
 	soc@fff00000 {
-- 
1.7.4.1

Re: [PATCH net-next v6 0/4] can: cc770: add support for the Bosch CC770 and Intel AN82527

[David Miller]

From: Wolfgang Grandegger <wg@grandegger.com>
Date: Thu,  1 Dec 2011 10:41:17 +0100

> Already since a while we have support for the Bosch CC770 and Intel
> AN82527 CAN controllers in our out-of-tree Socket-CAN repository.
> 
> In the meantime I found a TQM855L board with two AN82527 on it,
> which allowed me to provide and test a generic platform driver
> as well.

Applied.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Thu, 2011-12-01 at 10:41 +0100, Wolfgang Grandegger wrote:
> This patch enables or updates support for the CC770 and AN82527
> CAN controller on the TQM8548 and TQM8xx boards.

I'm a bit confused by the net-next prefix here. Those patches seem to
be only touching arch/powerpc and seem to be sent primarily toward
netdev with a net-next prefix.

Also there have been at least 3 versions in a couple of days already
without comments nor indication of what was changed...

Can you clarify things a bit please ? It looks like they really should
go to linuxppc-dev (and you can probably drop a bunch of other lists) or
am I missing an important piece of the puzzle ? (Such as patch 1/4 and
2/4 ...)

Let me know if I should just remove them from powerpc patchwork.

Cheers,
Ben.

> CC: devicetree-discuss@lists.ozlabs.org
> CC: linuxppc-dev@ozlabs.org
> CC: Kumar Gala <galak@kernel.crashing.org>
> Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
> ---
>  arch/powerpc/boot/dts/tqm8548-bigflash.dts |   19 ++++++++++++++-----
>  arch/powerpc/boot/dts/tqm8548.dts          |   19 ++++++++++++++-----
>  arch/powerpc/boot/dts/tqm8xx.dts           |   25 +++++++++++++++++++++++++
>  3 files changed, 53 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/powerpc/boot/dts/tqm8548-bigflash.dts b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> index 9452c3c..d918752 100644
> --- a/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> +++ b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> @@ -352,7 +352,7 @@
>  		ranges = <
>  			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
>  			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
> -			2 0x0 0xa3000000 0x00008000	// CAN (2 x i82527)
> +			2 0x0 0xa3000000 0x00008000	// CAN (2 x CC770)
>  			3 0x0 0xa3010000 0x00008000	// NAND FLASH
>  
>  		>;
> @@ -393,18 +393,27 @@
>  		};
>  
>  		/* Note: CAN support needs be enabled in U-Boot */
> -		can0@2,0 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,0 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x0 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
>  		};
>  
> -		can1@2,100 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,100 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x100 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
>  		};
>  
>  		/* Note: NAND support needs to be enabled in U-Boot */
> diff --git a/arch/powerpc/boot/dts/tqm8548.dts b/arch/powerpc/boot/dts/tqm8548.dts
> index 619776f..988d887 100644
> --- a/arch/powerpc/boot/dts/tqm8548.dts
> +++ b/arch/powerpc/boot/dts/tqm8548.dts
> @@ -352,7 +352,7 @@
>  		ranges = <
>  			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
>  			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
> -			2 0x0 0xe3000000 0x00008000	// CAN (2 x i82527)
> +			2 0x0 0xe3000000 0x00008000	// CAN (2 x CC770)
>  			3 0x0 0xe3010000 0x00008000	// NAND FLASH
>  
>  		>;
> @@ -393,18 +393,27 @@
>  		};
>  
>  		/* Note: CAN support needs be enabled in U-Boot */
> -		can0@2,0 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,0 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x0 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
>  		};
>  
> -		can1@2,100 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,100 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x100 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
>  		};
>  
>  		/* Note: NAND support needs to be enabled in U-Boot */
> diff --git a/arch/powerpc/boot/dts/tqm8xx.dts b/arch/powerpc/boot/dts/tqm8xx.dts
> index f6da7ec..c3dba25 100644
> --- a/arch/powerpc/boot/dts/tqm8xx.dts
> +++ b/arch/powerpc/boot/dts/tqm8xx.dts
> @@ -57,6 +57,7 @@
>  
>  		ranges = <
>  			0x0 0x0 0x40000000 0x800000
> +			0x3 0x0 0xc0000000 0x200
>  		>;
>  
>  		flash@0,0 {
> @@ -67,6 +68,30 @@
>  			bank-width = <4>;
>  			device-width = <2>;
>  		};
> +
> +		/* Note: CAN support needs be enabled in U-Boot */
> +		can@3,0 {
> +			compatible = "intc,82527";
> +			reg = <3 0x0 0x80>;
> +			interrupts = <8 1>;
> +			interrupt-parent = <&PIC>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
> +		};
> +
> +		can@3,100 {
> +			compatible = "intc,82527";
> +			reg = <3 0x100 0x80>;
> +			interrupts = <8 1>;
> +			interrupt-parent = <&PIC>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +		};
>  	};
>  
>  	soc@fff00000 {

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[David Miller]

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 07 Dec 2011 18:34:28 +1100

> Let me know if I should just remove them from powerpc patchwork.

These are DT entries for CAN devices for which drivers only exist in
the net-next tree, I already included this patch into the net-next
tree so you do not have to.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Wed, 2011-12-07 at 02:39 -0500, David Miller wrote:
> From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Date: Wed, 07 Dec 2011 18:34:28 +1100
> 
> > Let me know if I should just remove them from powerpc patchwork.
> 
> These are DT entries for CAN devices for which drivers only exist in
> the net-next tree, I already included this patch into the net-next
> tree so you do not have to.

Thanks.

Cheers,
Ben.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Wolfgang Grandegger]

On 12/07/2011 08:34 AM, Benjamin Herrenschmidt wrote:
> On Thu, 2011-12-01 at 10:41 +0100, Wolfgang Grandegger wrote:
>> This patch enables or updates support for the CC770 and AN82527
>> CAN controller on the TQM8548 and TQM8xx boards.
> 
> I'm a bit confused by the net-next prefix here. Those patches seem to
> be only touching arch/powerpc and seem to be sent primarily toward
> netdev with a net-next prefix.

These patches are part of a series implementing a new netdev CAN driver
with device-tree support for CC770/i82527 CAN controllers. The
device-tree support and bindings are properly documented and some DTS
files have been updated accordingly. The relevant maintainers and
mailing list have been addressed.

> Also there have been at least 3 versions in a couple of days already
> without comments nor indication of what was changed...

Unfortunately, no response from those sub-system guys.

> Can you clarify things a bit please ? It looks like they really should
> go to linuxppc-dev (and you can probably drop a bunch of other lists) or
> am I missing an important piece of the puzzle ? (Such as patch 1/4 and
> 2/4 ...)

I have not sent the  whole series. The changes are documented in the
cover-letter, which I have not sent for those patches. Well, I think
it's better to sent the whole series to all parties instead?

> Let me know if I should just remove them from powerpc patchwork.

Dave has already applied all patches.

Sorry for the confusion. Any advice on how to handle multi subsystem
series of patches properly is welcome.

Wolfgang.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Wed, 2011-12-07 at 09:25 +0100, Wolfgang Grandegger wrote:

> > Also there have been at least 3 versions in a couple of days already
> > without comments nor indication of what was changed...
> 
> Unfortunately, no response from those sub-system guys.
> 
> > Can you clarify things a bit please ? It looks like they really should
> > go to linuxppc-dev (and you can probably drop a bunch of other lists) or
> > am I missing an important piece of the puzzle ? (Such as patch 1/4 and
> > 2/4 ...)
> 
> I have not sent the  whole series. The changes are documented in the
> cover-letter, which I have not sent for those patches. Well, I think
> it's better to sent the whole series to all parties instead?

Well at least for linuxppc-dev, don't bother now that I know what this
is about :-)

> > Let me know if I should just remove them from powerpc patchwork.
> 
> Dave has already applied all patches.
> 
> Sorry for the confusion. Any advice on how to handle multi subsystem
> series of patches properly is welcome.

No specific advice. Ideally, if patchwork could track cover letters it
would help but I don't see a non-nasty way to do it so ... :-)

Cheers,
Ben.