Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

3 files changed, 0 insertions, 794 deletions

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index ac4ff394bc56..2cb75988b328 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -88,15 +88,6 @@ config CAN_AT91
 	  This is a driver for the SoC CAN controller in Atmel's AT91SAM9263
 	  and AT91SAM9X5 processors.
 
-config CAN_BFIN
-	depends on BF534 || BF536 || BF537 || BF538 || BF539 || BF54x
-	tristate "Analog Devices Blackfin on-chip CAN"
-	---help---
-	  Driver for the Analog Devices Blackfin on-chip CAN controllers
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called bfin_can.
-
 config CAN_FLEXCAN
 	tristate "Support for Freescale FLEXCAN based chips"
 	depends on ARM || PPC
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index 02b8ed794564..44922bf29b6a 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -19,7 +19,6 @@ obj-y				+= usb/
 obj-y				+= softing/
 
 obj-$(CONFIG_CAN_AT91)		+= at91_can.o
-obj-$(CONFIG_CAN_BFIN)		+= bfin_can.o
 obj-$(CONFIG_CAN_CC770)		+= cc770/
 obj-$(CONFIG_CAN_C_CAN)		+= c_can/
 obj-$(CONFIG_CAN_FLEXCAN)	+= flexcan.o
diff --git a/drivers/net/can/bfin_can.c b/drivers/net/can/bfin_can.c
deleted file mode 100644
index 1deb8ff90a89..000000000000
--- a/drivers/net/can/bfin_can.c
+++ /dev/null
@@ -1,784 +0,0 @@
-/*
- * Blackfin On-Chip CAN Driver
- *
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/bitops.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <linux/platform_device.h>
-
-#include <linux/can/dev.h>
-#include <linux/can/error.h>
-
-#include <asm/portmux.h>
-
-#define DRV_NAME "bfin_can"
-#define BFIN_CAN_TIMEOUT 100
-#define TX_ECHO_SKB_MAX  1
-
-/* transmit and receive channels */
-#define TRANSMIT_CHL 24
-#define RECEIVE_STD_CHL 0
-#define RECEIVE_EXT_CHL 4
-#define RECEIVE_RTR_CHL 8
-#define RECEIVE_EXT_RTR_CHL 12
-#define MAX_CHL_NUMBER 32
-
-/* All Blackfin system MMRs are padded to 32bits even if the register
- * itself is only 16bits.  So use a helper macro to streamline this
- */
-#define __BFP(m) u16 m; u16 __pad_##m
-
-/* bfin can registers layout */
-struct bfin_can_mask_regs {
-	__BFP(aml);
-	__BFP(amh);
-};
-
-struct bfin_can_channel_regs {
-	/* data[0,2,4,6] -> data{0,1,2,3} while data[1,3,5,7] is padding */
-	u16 data[8];
-	__BFP(dlc);
-	__BFP(tsv);
-	__BFP(id0);
-	__BFP(id1);
-};
-
-struct bfin_can_regs {
-	/* global control and status registers */
-	__BFP(mc1);		/* offset 0x00 */
-	__BFP(md1);		/* offset 0x04 */
-	__BFP(trs1);		/* offset 0x08 */
-	__BFP(trr1);		/* offset 0x0c */
-	__BFP(ta1);		/* offset 0x10 */
-	__BFP(aa1);		/* offset 0x14 */
-	__BFP(rmp1);		/* offset 0x18 */
-	__BFP(rml1);		/* offset 0x1c */
-	__BFP(mbtif1);		/* offset 0x20 */
-	__BFP(mbrif1);		/* offset 0x24 */
-	__BFP(mbim1);		/* offset 0x28 */
-	__BFP(rfh1);		/* offset 0x2c */
-	__BFP(opss1);		/* offset 0x30 */
-	u32 __pad1[3];
-	__BFP(mc2);		/* offset 0x40 */
-	__BFP(md2);		/* offset 0x44 */
-	__BFP(trs2);		/* offset 0x48 */
-	__BFP(trr2);		/* offset 0x4c */
-	__BFP(ta2);		/* offset 0x50 */
-	__BFP(aa2);		/* offset 0x54 */
-	__BFP(rmp2);		/* offset 0x58 */
-	__BFP(rml2);		/* offset 0x5c */
-	__BFP(mbtif2);		/* offset 0x60 */
-	__BFP(mbrif2);		/* offset 0x64 */
-	__BFP(mbim2);		/* offset 0x68 */
-	__BFP(rfh2);		/* offset 0x6c */
-	__BFP(opss2);		/* offset 0x70 */
-	u32 __pad2[3];
-	__BFP(clock);		/* offset 0x80 */
-	__BFP(timing);		/* offset 0x84 */
-	__BFP(debug);		/* offset 0x88 */
-	__BFP(status);		/* offset 0x8c */
-	__BFP(cec);		/* offset 0x90 */
-	__BFP(gis);		/* offset 0x94 */
-	__BFP(gim);		/* offset 0x98 */
-	__BFP(gif);		/* offset 0x9c */
-	__BFP(control);		/* offset 0xa0 */
-	__BFP(intr);		/* offset 0xa4 */
-	__BFP(version);		/* offset 0xa8 */
-	__BFP(mbtd);		/* offset 0xac */
-	__BFP(ewr);		/* offset 0xb0 */
-	__BFP(esr);		/* offset 0xb4 */
-	u32 __pad3[2];
-	__BFP(ucreg);		/* offset 0xc0 */
-	__BFP(uccnt);		/* offset 0xc4 */
-	__BFP(ucrc);		/* offset 0xc8 */
-	__BFP(uccnf);		/* offset 0xcc */
-	u32 __pad4[1];
-	__BFP(version2);	/* offset 0xd4 */
-	u32 __pad5[10];
-
-	/* channel(mailbox) mask and message registers */
-	struct bfin_can_mask_regs msk[MAX_CHL_NUMBER];		/* offset 0x100 */
-	struct bfin_can_channel_regs chl[MAX_CHL_NUMBER];	/* offset 0x200 */
-};
-
-#undef __BFP
-
-#define SRS 0x0001		/* Software Reset */
-#define SER 0x0008		/* Stuff Error */
-#define BOIM 0x0008		/* Enable Bus Off Interrupt */
-#define CCR 0x0080		/* CAN Configuration Mode Request */
-#define CCA 0x0080		/* Configuration Mode Acknowledge */
-#define SAM 0x0080		/* Sampling */
-#define AME 0x8000		/* Acceptance Mask Enable */
-#define RMLIM 0x0080		/* Enable RX Message Lost Interrupt */
-#define RMLIS 0x0080		/* RX Message Lost IRQ Status */
-#define RTR 0x4000		/* Remote Frame Transmission Request */
-#define BOIS 0x0008		/* Bus Off IRQ Status */
-#define IDE 0x2000		/* Identifier Extension */
-#define EPIS 0x0004		/* Error-Passive Mode IRQ Status */
-#define EPIM 0x0004		/* Enable Error-Passive Mode Interrupt */
-#define EWTIS 0x0001		/* TX Error Count IRQ Status */
-#define EWRIS 0x0002		/* RX Error Count IRQ Status */
-#define BEF 0x0040		/* Bit Error Flag */
-#define FER 0x0080		/* Form Error Flag */
-#define SMR 0x0020		/* Sleep Mode Request */
-#define SMACK 0x0008		/* Sleep Mode Acknowledge */
-
-/*
- * bfin can private data
- */
-struct bfin_can_priv {
-	struct can_priv can;	/* must be the first member */
-	struct net_device *dev;
-	void __iomem *membase;
-	int rx_irq;
-	int tx_irq;
-	int err_irq;
-	unsigned short *pin_list;
-};
-
-/*
- * bfin can timing parameters
- */
-static const struct can_bittiming_const bfin_can_bittiming_const = {
-	.name = DRV_NAME,
-	.tseg1_min = 1,
-	.tseg1_max = 16,
-	.tseg2_min = 1,
-	.tseg2_max = 8,
-	.sjw_max = 4,
-	/*
-	 * Although the BRP field can be set to any value, it is recommended
-	 * that the value be greater than or equal to 4, as restrictions
-	 * apply to the bit timing configuration when BRP is less than 4.
-	 */
-	.brp_min = 4,
-	.brp_max = 1024,
-	.brp_inc = 1,
-};
-
-static int bfin_can_set_bittiming(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	struct can_bittiming *bt = &priv->can.bittiming;
-	u16 clk, timing;
-
-	clk = bt->brp - 1;
-	timing = ((bt->sjw - 1) << 8) | (bt->prop_seg + bt->phase_seg1 - 1) |
-		((bt->phase_seg2 - 1) << 4);
-
-	/*
-	 * If the SAM bit is set, the input signal is oversampled three times
-	 * at the SCLK rate.
-	 */
-	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
-		timing |= SAM;
-
-	writew(clk, &reg->clock);
-	writew(timing, &reg->timing);
-
-	netdev_info(dev, "setting CLOCK=0x%04x TIMING=0x%04x\n", clk, timing);
-
-	return 0;
-}
-
-static void bfin_can_set_reset_mode(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	int timeout = BFIN_CAN_TIMEOUT;
-	int i;
-
-	/* disable interrupts */
-	writew(0, &reg->mbim1);
-	writew(0, &reg->mbim2);
-	writew(0, &reg->gim);
-
-	/* reset can and enter configuration mode */
-	writew(SRS | CCR, &reg->control);
-	writew(CCR, &reg->control);
-	while (!(readw(&reg->control) & CCA)) {
-		udelay(10);
-		if (--timeout == 0) {
-			netdev_err(dev, "fail to enter configuration mode\n");
-			BUG();
-		}
-	}
-
-	/*
-	 * All mailbox configurations are marked as inactive
-	 * by writing to CAN Mailbox Configuration Registers 1 and 2
-	 * For all bits: 0 - Mailbox disabled, 1 - Mailbox enabled
-	 */
-	writew(0, &reg->mc1);
-	writew(0, &reg->mc2);
-
-	/* Set Mailbox Direction */
-	writew(0xFFFF, &reg->md1);   /* mailbox 1-16 are RX */
-	writew(0, &reg->md2);   /* mailbox 17-32 are TX */
-
-	/* RECEIVE_STD_CHL */
-	for (i = 0; i < 2; i++) {
-		writew(0, &reg->chl[RECEIVE_STD_CHL + i].id0);
-		writew(AME, &reg->chl[RECEIVE_STD_CHL + i].id1);
-		writew(0, &reg->chl[RECEIVE_STD_CHL + i].dlc);
-		writew(0x1FFF, &reg->msk[RECEIVE_STD_CHL + i].amh);
-		writew(0xFFFF, &reg->msk[RECEIVE_STD_CHL + i].aml);
-	}
-
-	/* RECEIVE_EXT_CHL */
-	for (i = 0; i < 2; i++) {
-		writew(0, &reg->chl[RECEIVE_EXT_CHL + i].id0);
-		writew(AME | IDE, &reg->chl[RECEIVE_EXT_CHL + i].id1);
-		writew(0, &reg->chl[RECEIVE_EXT_CHL + i].dlc);
-		writew(0x1FFF, &reg->msk[RECEIVE_EXT_CHL + i].amh);
-		writew(0xFFFF, &reg->msk[RECEIVE_EXT_CHL + i].aml);
-	}
-
-	writew(BIT(TRANSMIT_CHL - 16), &reg->mc2);
-	writew(BIT(RECEIVE_STD_CHL) + BIT(RECEIVE_EXT_CHL), &reg->mc1);
-
-	priv->can.state = CAN_STATE_STOPPED;
-}
-
-static void bfin_can_set_normal_mode(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	int timeout = BFIN_CAN_TIMEOUT;
-
-	/*
-	 * leave configuration mode
-	 */
-	writew(readw(&reg->control) & ~CCR, &reg->control);
-
-	while (readw(&reg->status) & CCA) {
-		udelay(10);
-		if (--timeout == 0) {
-			netdev_err(dev, "fail to leave configuration mode\n");
-			BUG();
-		}
-	}
-
-	/*
-	 * clear _All_  tx and rx interrupts
-	 */
-	writew(0xFFFF, &reg->mbtif1);
-	writew(0xFFFF, &reg->mbtif2);
-	writew(0xFFFF, &reg->mbrif1);
-	writew(0xFFFF, &reg->mbrif2);
-
-	/*
-	 * clear global interrupt status register
-	 */
-	writew(0x7FF, &reg->gis); /* overwrites with '1' */
-
-	/*
-	 * Initialize Interrupts
-	 * - set bits in the mailbox interrupt mask register
-	 * - global interrupt mask
-	 */
-	writew(BIT(RECEIVE_STD_CHL) + BIT(RECEIVE_EXT_CHL), &reg->mbim1);
-	writew(BIT(TRANSMIT_CHL - 16), &reg->mbim2);
-
-	writew(EPIM | BOIM | RMLIM, &reg->gim);
-}
-
-static void bfin_can_start(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-
-	/* enter reset mode */
-	if (priv->can.state != CAN_STATE_STOPPED)
-		bfin_can_set_reset_mode(dev);
-
-	/* leave reset mode */
-	bfin_can_set_normal_mode(dev);
-}
-
-static int bfin_can_set_mode(struct net_device *dev, enum can_mode mode)
-{
-	switch (mode) {
-	case CAN_MODE_START:
-		bfin_can_start(dev);
-		if (netif_queue_stopped(dev))
-			netif_wake_queue(dev);
-		break;
-
-	default:
-		return -EOPNOTSUPP;
-	}
-
-	return 0;
-}
-
-static int bfin_can_get_berr_counter(const struct net_device *dev,
-				     struct can_berr_counter *bec)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-
-	u16 cec = readw(&reg->cec);
-
-	bec->txerr = cec >> 8;
-	bec->rxerr = cec;
-
-	return 0;
-}
-
-static int bfin_can_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	struct can_frame *cf = (struct can_frame *)skb->data;
-	u8 dlc = cf->can_dlc;
-	canid_t id = cf->can_id;
-	u8 *data = cf->data;
-	u16 val;
-	int i;
-
-	if (can_dropped_invalid_skb(dev, skb))
-		return NETDEV_TX_OK;
-
-	netif_stop_queue(dev);
-
-	/* fill id */
-	if (id & CAN_EFF_FLAG) {
-		writew(id, &reg->chl[TRANSMIT_CHL].id0);
-		val = ((id & 0x1FFF0000) >> 16) | IDE;
-	} else
-		val = (id << 2);
-	if (id & CAN_RTR_FLAG)
-		val |= RTR;
-	writew(val | AME, &reg->chl[TRANSMIT_CHL].id1);
-
-	/* fill payload */
-	for (i = 0; i < 8; i += 2) {
-		val = ((7 - i) < dlc ? (data[7 - i]) : 0) +
-			((6 - i) < dlc ? (data[6 - i] << 8) : 0);
-		writew(val, &reg->chl[TRANSMIT_CHL].data[i]);
-	}
-
-	/* fill data length code */
-	writew(dlc, &reg->chl[TRANSMIT_CHL].dlc);
-
-	can_put_echo_skb(skb, dev, 0);
-
-	/* set transmit request */
-	writew(BIT(TRANSMIT_CHL - 16), &reg->trs2);
-
-	return 0;
-}
-
-static void bfin_can_rx(struct net_device *dev, u16 isrc)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct net_device_stats *stats = &dev->stats;
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	struct can_frame *cf;
-	struct sk_buff *skb;
-	int obj;
-	int i;
-	u16 val;
-
-	skb = alloc_can_skb(dev, &cf);
-	if (skb == NULL)
-		return;
-
-	/* get id */
-	if (isrc & BIT(RECEIVE_EXT_CHL)) {
-		/* extended frame format (EFF) */
-		cf->can_id = ((readw(&reg->chl[RECEIVE_EXT_CHL].id1)
-			     & 0x1FFF) << 16)
-			     + readw(&reg->chl[RECEIVE_EXT_CHL].id0);
-		cf->can_id |= CAN_EFF_FLAG;
-		obj = RECEIVE_EXT_CHL;
-	} else {
-		/* standard frame format (SFF) */
-		cf->can_id = (readw(&reg->chl[RECEIVE_STD_CHL].id1)
-			     & 0x1ffc) >> 2;
-		obj = RECEIVE_STD_CHL;
-	}
-	if (readw(&reg->chl[obj].id1) & RTR)
-		cf->can_id |= CAN_RTR_FLAG;
-
-	/* get data length code */
-	cf->can_dlc = get_can_dlc(readw(&reg->chl[obj].dlc) & 0xF);
-
-	/* get payload */
-	for (i = 0; i < 8; i += 2) {
-		val = readw(&reg->chl[obj].data[i]);
-		cf->data[7 - i] = (7 - i) < cf->can_dlc ? val : 0;
-		cf->data[6 - i] = (6 - i) < cf->can_dlc ? (val >> 8) : 0;
-	}
-
-	stats->rx_packets++;
-	stats->rx_bytes += cf->can_dlc;
-	netif_rx(skb);
-}
-
-static int bfin_can_err(struct net_device *dev, u16 isrc, u16 status)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	struct net_device_stats *stats = &dev->stats;
-	struct can_frame *cf;
-	struct sk_buff *skb;
-	enum can_state state = priv->can.state;
-
-	skb = alloc_can_err_skb(dev, &cf);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	if (isrc & RMLIS) {
-		/* data overrun interrupt */
-		netdev_dbg(dev, "data overrun interrupt\n");
-		cf->can_id |= CAN_ERR_CRTL;
-		cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
-		stats->rx_over_errors++;
-		stats->rx_errors++;
-	}
-
-	if (isrc & BOIS) {
-		netdev_dbg(dev, "bus-off mode interrupt\n");
-		state = CAN_STATE_BUS_OFF;
-		cf->can_id |= CAN_ERR_BUSOFF;
-		priv->can.can_stats.bus_off++;
-		can_bus_off(dev);
-	}
-
-	if (isrc & EPIS) {
-		/* error passive interrupt */
-		netdev_dbg(dev, "error passive interrupt\n");
-		state = CAN_STATE_ERROR_PASSIVE;
-	}
-
-	if ((isrc & EWTIS) || (isrc & EWRIS)) {
-		netdev_dbg(dev, "Error Warning Transmit/Receive Interrupt\n");
-		state = CAN_STATE_ERROR_WARNING;
-	}
-
-	if (state != priv->can.state && (state == CAN_STATE_ERROR_WARNING ||
-				state == CAN_STATE_ERROR_PASSIVE)) {
-		u16 cec = readw(&reg->cec);
-		u8 rxerr = cec;
-		u8 txerr = cec >> 8;
-
-		cf->can_id |= CAN_ERR_CRTL;
-		if (state == CAN_STATE_ERROR_WARNING) {
-			priv->can.can_stats.error_warning++;
-			cf->data[1] = (txerr > rxerr) ?
-				CAN_ERR_CRTL_TX_WARNING :
-				CAN_ERR_CRTL_RX_WARNING;
-		} else {
-			priv->can.can_stats.error_passive++;
-			cf->data[1] = (txerr > rxerr) ?
-				CAN_ERR_CRTL_TX_PASSIVE :
-				CAN_ERR_CRTL_RX_PASSIVE;
-		}
-	}
-
-	if (status) {
-		priv->can.can_stats.bus_error++;
-
-		cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
-
-		if (status & BEF)
-			cf->data[2] |= CAN_ERR_PROT_BIT;
-		else if (status & FER)
-			cf->data[2] |= CAN_ERR_PROT_FORM;
-		else if (status & SER)
-			cf->data[2] |= CAN_ERR_PROT_STUFF;
-	}
-
-	priv->can.state = state;
-
-	stats->rx_packets++;
-	stats->rx_bytes += cf->can_dlc;
-	netif_rx(skb);
-
-	return 0;
-}
-
-static irqreturn_t bfin_can_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	struct net_device_stats *stats = &dev->stats;
-	u16 status, isrc;
-
-	if ((irq == priv->tx_irq) && readw(&reg->mbtif2)) {
-		/* transmission complete interrupt */
-		writew(0xFFFF, &reg->mbtif2);
-		stats->tx_packets++;
-		stats->tx_bytes += readw(&reg->chl[TRANSMIT_CHL].dlc);
-		can_get_echo_skb(dev, 0);
-		netif_wake_queue(dev);
-	} else if ((irq == priv->rx_irq) && readw(&reg->mbrif1)) {
-		/* receive interrupt */
-		isrc = readw(&reg->mbrif1);
-		writew(0xFFFF, &reg->mbrif1);
-		bfin_can_rx(dev, isrc);
-	} else if ((irq == priv->err_irq) && readw(&reg->gis)) {
-		/* error interrupt */
-		isrc = readw(&reg->gis);
-		status = readw(&reg->esr);
-		writew(0x7FF, &reg->gis);
-		bfin_can_err(dev, isrc, status);
-	} else {
-		return IRQ_NONE;
-	}
-
-	return IRQ_HANDLED;
-}
-
-static int bfin_can_open(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	int err;
-
-	/* set chip into reset mode */
-	bfin_can_set_reset_mode(dev);
-
-	/* common open */
-	err = open_candev(dev);
-	if (err)
-		goto exit_open;
-
-	/* register interrupt handler */
-	err = request_irq(priv->rx_irq, &bfin_can_interrupt, 0,
-			"bfin-can-rx", dev);
-	if (err)
-		goto exit_rx_irq;
-	err = request_irq(priv->tx_irq, &bfin_can_interrupt, 0,
-			"bfin-can-tx", dev);
-	if (err)
-		goto exit_tx_irq;
-	err = request_irq(priv->err_irq, &bfin_can_interrupt, 0,
-			"bfin-can-err", dev);
-	if (err)
-		goto exit_err_irq;
-
-	bfin_can_start(dev);
-
-	netif_start_queue(dev);
-
-	return 0;
-
-exit_err_irq:
-	free_irq(priv->tx_irq, dev);
-exit_tx_irq:
-	free_irq(priv->rx_irq, dev);
-exit_rx_irq:
-	close_candev(dev);
-exit_open:
-	return err;
-}
-
-static int bfin_can_close(struct net_device *dev)
-{
-	struct bfin_can_priv *priv = netdev_priv(dev);
-
-	netif_stop_queue(dev);
-	bfin_can_set_reset_mode(dev);
-
-	close_candev(dev);
-
-	free_irq(priv->rx_irq, dev);
-	free_irq(priv->tx_irq, dev);
-	free_irq(priv->err_irq, dev);
-
-	return 0;
-}
-
-static struct net_device *alloc_bfin_candev(void)
-{
-	struct net_device *dev;
-	struct bfin_can_priv *priv;
-
-	dev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
-	if (!dev)
-		return NULL;
-
-	priv = netdev_priv(dev);
-
-	priv->dev = dev;
-	priv->can.bittiming_const = &bfin_can_bittiming_const;
-	priv->can.do_set_bittiming = bfin_can_set_bittiming;
-	priv->can.do_set_mode = bfin_can_set_mode;
-	priv->can.do_get_berr_counter = bfin_can_get_berr_counter;
-	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
-
-	return dev;
-}
-
-static const struct net_device_ops bfin_can_netdev_ops = {
-	.ndo_open               = bfin_can_open,
-	.ndo_stop               = bfin_can_close,
-	.ndo_start_xmit         = bfin_can_start_xmit,
-	.ndo_change_mtu         = can_change_mtu,
-};
-
-static int bfin_can_probe(struct platform_device *pdev)
-{
-	int err;
-	struct net_device *dev;
-	struct bfin_can_priv *priv;
-	struct resource *res_mem, *rx_irq, *tx_irq, *err_irq;
-	unsigned short *pdata;
-
-	pdata = dev_get_platdata(&pdev->dev);
-	if (!pdata) {
-		dev_err(&pdev->dev, "No platform data provided!\n");
-		err = -EINVAL;
-		goto exit;
-	}
-
-	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	rx_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	tx_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
-	err_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
-	if (!res_mem || !rx_irq || !tx_irq || !err_irq) {
-		err = -EINVAL;
-		goto exit;
-	}
-
-	/* request peripheral pins */
-	err = peripheral_request_list(pdata, dev_name(&pdev->dev));
-	if (err)
-		goto exit;
-
-	dev = alloc_bfin_candev();
-	if (!dev) {
-		err = -ENOMEM;
-		goto exit_peri_pin_free;
-	}
-
-	priv = netdev_priv(dev);
-
-	priv->membase = devm_ioremap_resource(&pdev->dev, res_mem);
-	if (IS_ERR(priv->membase)) {
-		err = PTR_ERR(priv->membase);
-		goto exit_peri_pin_free;
-	}
-
-	priv->rx_irq = rx_irq->start;
-	priv->tx_irq = tx_irq->start;
-	priv->err_irq = err_irq->start;
-	priv->pin_list = pdata;
-	priv->can.clock.freq = get_sclk();
-
-	platform_set_drvdata(pdev, dev);
-	SET_NETDEV_DEV(dev, &pdev->dev);
-
-	dev->flags |= IFF_ECHO;	/* we support local echo */
-	dev->netdev_ops = &bfin_can_netdev_ops;
-
-	bfin_can_set_reset_mode(dev);
-
-	err = register_candev(dev);
-	if (err) {
-		dev_err(&pdev->dev, "registering failed (err=%d)\n", err);
-		goto exit_candev_free;
-	}
-
-	dev_info(&pdev->dev,
-		"%s device registered"
-		"(&reg_base=%p, rx_irq=%d, tx_irq=%d, err_irq=%d, sclk=%d)\n",
-		DRV_NAME, priv->membase, priv->rx_irq,
-		priv->tx_irq, priv->err_irq, priv->can.clock.freq);
-	return 0;
-
-exit_candev_free:
-	free_candev(dev);
-exit_peri_pin_free:
-	peripheral_free_list(pdata);
-exit:
-	return err;
-}
-
-static int bfin_can_remove(struct platform_device *pdev)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct bfin_can_priv *priv = netdev_priv(dev);
-
-	bfin_can_set_reset_mode(dev);
-
-	unregister_candev(dev);
-
-	peripheral_free_list(priv->pin_list);
-
-	free_candev(dev);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int bfin_can_suspend(struct platform_device *pdev, pm_message_t mesg)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-	int timeout = BFIN_CAN_TIMEOUT;
-
-	if (netif_running(dev)) {
-		/* enter sleep mode */
-		writew(readw(&reg->control) | SMR, &reg->control);
-		while (!(readw(&reg->intr) & SMACK)) {
-			udelay(10);
-			if (--timeout == 0) {
-				netdev_err(dev, "fail to enter sleep mode\n");
-				BUG();
-			}
-		}
-	}
-
-	return 0;
-}
-
-static int bfin_can_resume(struct platform_device *pdev)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct bfin_can_priv *priv = netdev_priv(dev);
-	struct bfin_can_regs __iomem *reg = priv->membase;
-
-	if (netif_running(dev)) {
-		/* leave sleep mode */
-		writew(0, &reg->intr);
-	}
-
-	return 0;
-}
-#else
-#define bfin_can_suspend NULL
-#define bfin_can_resume NULL
-#endif	/* CONFIG_PM */
-
-static struct platform_driver bfin_can_driver = {
-	.probe = bfin_can_probe,
-	.remove = bfin_can_remove,
-	.suspend = bfin_can_suspend,
-	.resume = bfin_can_resume,
-	.driver = {
-		.name = DRV_NAME,
-	},
-};
-
-module_platform_driver(bfin_can_driver);
-
-MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Blackfin on-chip CAN netdevice driver");
-MODULE_ALIAS("platform:" DRV_NAME);