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Subject[Blackfin removal] [PATCH 22/28] can: Remove Blackfin CAN bus support
Date
Signed-off-by: Aaron Wu <aaron.wu@analog.com>

Remove Blackfin CAN bus support
---
drivers/net/can/Kconfig | 9 -
drivers/net/can/Makefile | 1 -
drivers/net/can/bfin_can.c | 784 ---------------------------------------------
3 files changed, 794 deletions(-)
delete mode 100644 drivers/net/can/bfin_can.c

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index ac4ff39..2cb7598 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 02b8ed7..44922bf 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 1deb8ff9..0000000
--- 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);
--
2.7.4
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