+++ /dev/null
-/*
- * cc770.c - Bosch CC770 and Intel AN82527 network device driver
- *
- * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
- *
- * Derived from the old Socket-CAN i82527 driver:
- *
- * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Volkswagen nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * Alternatively, provided that this notice is retained in full, this
- * software may be distributed under the terms of the GNU General
- * Public License ("GPL") version 2, in which case the provisions of the
- * GPL apply INSTEAD OF those given above.
- *
- * The provided data structures and external interfaces from this code
- * are not restricted to be used by modules with a GPL compatible license.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * Send feedback to <socketcan-users@lists.berlios.de>
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/version.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 "cc770.h"
-
-#define DRV_NAME "cc770"
-
-MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION(DRV_NAME "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 = DRV_NAME,
- .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 < CC770_OBJ_MAX; 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 i, mo;
-
- for (i = 0; i < CC770_OBJ_MAX; i++) {
- mo = obj2msgobj(i);
-
- if (priv->obj_flags[i] & CC770_OBJ_FLAG_RX) {
- if (i > 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 | CPUIF_CEN);
-
- /* 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 0;
- }
-
- /* Write and read back test pattern */
- 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 0;
- }
-
- /* 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 1;
-}
-
-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)
-{
- struct cc770_priv *priv = netdev_priv(dev);
-
- if (!priv->open_time)
- return -EINVAL;
-
- switch (mode) {
- case CAN_MODE_START:
- cc770_start(dev);
- if (netif_queue_stopped(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 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) & 0xFFU);
- cc770_write_reg(priv, msgobj[mo].id[2],
- (id >> 5) & 0xFFU);
- cc770_write_reg(priv, msgobj[mo].id[1],
- (id >> 13) & 0xFFU);
- cc770_write_reg(priv, msgobj[mo].id[0],
- (id >> 21) & 0xFFU);
- } 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) & 0xFFU);
- cc770_write_reg(priv, msgobj[mo].id[1],
- (id << 5) & 0xFFU);
- }
-
- dlc &= 0x0f; /* restore length only */
- 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 == NULL)
- 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 == NULL)
- return -ENOMEM;
-
- 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;
- 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++;
- }
-
- 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;
-
- while (1) {
- 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;
-
- while (1) {
- 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, (void *)dev);
- if (err) {
- close_candev(dev);
- return -EAGAIN;
- }
-
- /* init and start chip */
- cc770_start(dev);
- priv->open_time = jiffies;
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int cc770_close(struct net_device *dev)
-{
- struct cc770_priv *priv = netdev_priv(dev);
-
- netif_stop_queue(dev);
- set_reset_mode(dev);
-
- free_irq(dev->irq, (void *)dev);
- close_candev(dev);
-
- priv->open_time = 0;
-
- 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);
-
- if (!cc770_probe_chip(dev))
- return -ENODEV;
-
- 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->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("%s CAN netdevice driver\n", DRV_NAME);
-
- return 0;
-}
-module_init(cc770_init);
-
-static __exit void cc770_exit(void)
-{
- pr_info("%s: driver removed\n", DRV_NAME);
-}
-module_exit(cc770_exit);
+++ /dev/null
-/*
- * cc770.h - Bosch CC770 and Intel AN82527 network device driver
- *
- * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
- *
- * Derived from the old Socket-CAN i82527 driver:
- *
- * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Volkswagen nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * Alternatively, provided that this notice is retained in full, this
- * software may be distributed under the terms of the GNU General
- * Public License ("GPL") version 2, in which case the provisions of the
- * GPL apply INSTEAD OF those given above.
- *
- * The provided data structures and external interfaces from this code
- * are not restricted to be used by modules with a GPL compatible license.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * Send feedback to <socketcan-users@lists.berlios.de>
- */
-
-#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 */
-} __attribute__ ((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;
- };
- };
-} __attribute__ ((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) */
-#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 */
-
-/* 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_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 */
- int open_time;
- 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 */
+++ /dev/null
-/*
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/kernel.h>
-#include <linux/version.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 "cc770.h"
-
-#define DRV_NAME "cc770_isa"
-
-#define MAXDEV 8
-
-MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
-MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the ISA bus");
-MODULE_LICENSE("GPL v2");
-
-#define CLK_DEFAULT 16000000 /* 16 MHz */
-#define BCR_DEFAULT 0x00
-#define COR_DEFAULT 0x00
-
-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 bcr[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
-static u8 __devinitdata cor[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 [CPU_DSC])");
-
-module_param_array(bcr, byte, NULL, S_IRUGO);
-MODULE_PARM_DESC(ocr, "Bus configuration register (default=0x00)");
-
-module_param_array(cor, byte, NULL, S_IRUGO);
-MODULE_PARM_DESC(cor, "Clockout register (default=0x00)");
-
-#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, DRV_NAME)) {
- 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, DRV_NAME)) {
- 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] & 0xff;
- } else if (cir[0] != 0xff) {
- priv->cpu_interface = cir[0] & 0xff;
- } 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] & 0xff;
- else if (bcr[0] != 0xff)
- priv->bus_config = bcr[0] & 0xff;
- else
- priv->bus_config = BCR_DEFAULT;
-
- if (cor[idx] != 0xff)
- priv->clkout = cor[idx];
- else if (cor[0] != 0xff)
- priv->clkout = cor[0] & 0xff;
- 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, "registering %s failed (err=%d)\n",
- DRV_NAME, err);
- goto exit_unmap;
- }
-
- dev_info(&pdev->dev, "%s device registered (reg_base=0x%p, irq=%d)\n",
- DRV_NAME, 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 = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init cc770_isa_init(void)
-{
- int idx, err;
-
- for (idx = 0; idx < MAXDEV; idx++) {
- if ((port[idx] || mem[idx]) && irq[idx]) {
- cc770_isa_devs[idx] =
- platform_device_alloc(DRV_NAME, 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("%s: platform device %d: port=%#lx, mem=%#lx, "
- "irq=%d\n",
- DRV_NAME, idx, port[idx], mem[idx], irq[idx]);
- } else if (idx == 0 || port[idx] || mem[idx]) {
- pr_err("%s: insufficient parameters supplied\n",
- DRV_NAME);
- err = -EINVAL;
- goto exit_free_devices;
- }
- }
-
- err = platform_driver_register(&cc770_isa_driver);
- if (err)
- goto exit_free_devices;
-
- pr_info("Legacy %s driver for max. %d devices registered\n",
- DRV_NAME, 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 < MAXDEV; idx++) {
- if (cc770_isa_devs[idx])
- platform_device_unregister(cc770_isa_devs[idx]);
- }
-}
-module_exit(cc770_isa_exit);
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff