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linux_dsm_epyc7002/drivers/net/cris/eth_v10.c
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

1745 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* e100net.c: A network driver for the ETRAX 100LX network controller.
*
* Copyright (c) 1998-2002 Axis Communications AB.
*
* The outline of this driver comes from skeleton.c.
*
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/if.h>
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <arch/svinto.h>/* DMA and register descriptions */
#include <asm/io.h> /* CRIS_LED_* I/O functions */
#include <asm/irq.h>
#include <asm/dma.h>
#include <asm/ethernet.h>
#include <asm/cache.h>
#include <arch/io_interface_mux.h>
//#define ETHDEBUG
#define D(x)
/*
* The name of the card. Is used for messages and in the requests for
* io regions, irqs and dma channels
*/
static const char* cardname = "ETRAX 100LX built-in ethernet controller";
/* A default ethernet address. Highlevel SW will set the real one later */
static struct sockaddr default_mac = {
0,
{ 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 }
};
/* Information that need to be kept for each board. */
struct net_local {
struct mii_if_info mii_if;
/* Tx control lock. This protects the transmit buffer ring
* state along with the "tx full" state of the driver. This
* means all netif_queue flow control actions are protected
* by this lock as well.
*/
spinlock_t lock;
spinlock_t led_lock; /* Protect LED state */
spinlock_t transceiver_lock; /* Protect transceiver state. */
};
typedef struct etrax_eth_descr
{
etrax_dma_descr descr;
struct sk_buff* skb;
} etrax_eth_descr;
/* Some transceivers requires special handling */
struct transceiver_ops
{
unsigned int oui;
void (*check_speed)(struct net_device* dev);
void (*check_duplex)(struct net_device* dev);
};
/* Duplex settings */
enum duplex
{
half,
full,
autoneg
};
/* Dma descriptors etc. */
#define MAX_MEDIA_DATA_SIZE 1522
#define MIN_PACKET_LEN 46
#define ETHER_HEAD_LEN 14
/*
** MDIO constants.
*/
#define MDIO_START 0x1
#define MDIO_READ 0x2
#define MDIO_WRITE 0x1
#define MDIO_PREAMBLE 0xfffffffful
/* Broadcom specific */
#define MDIO_AUX_CTRL_STATUS_REG 0x18
#define MDIO_BC_FULL_DUPLEX_IND 0x1
#define MDIO_BC_SPEED 0x2
/* TDK specific */
#define MDIO_TDK_DIAGNOSTIC_REG 18
#define MDIO_TDK_DIAGNOSTIC_RATE 0x400
#define MDIO_TDK_DIAGNOSTIC_DPLX 0x800
/*Intel LXT972A specific*/
#define MDIO_INT_STATUS_REG_2 0x0011
#define MDIO_INT_FULL_DUPLEX_IND (1 << 9)
#define MDIO_INT_SPEED (1 << 14)
/* Network flash constants */
#define NET_FLASH_TIME (HZ/50) /* 20 ms */
#define NET_FLASH_PAUSE (HZ/100) /* 10 ms */
#define NET_LINK_UP_CHECK_INTERVAL (2*HZ) /* 2 s */
#define NET_DUPLEX_CHECK_INTERVAL (2*HZ) /* 2 s */
#define NO_NETWORK_ACTIVITY 0
#define NETWORK_ACTIVITY 1
#define NBR_OF_RX_DESC 32
#define NBR_OF_TX_DESC 16
/* Large packets are sent directly to upper layers while small packets are */
/* copied (to reduce memory waste). The following constant decides the breakpoint */
#define RX_COPYBREAK 256
/* Due to a chip bug we need to flush the cache when descriptors are returned */
/* to the DMA. To decrease performance impact we return descriptors in chunks. */
/* The following constant determines the number of descriptors to return. */
#define RX_QUEUE_THRESHOLD NBR_OF_RX_DESC/2
#define GET_BIT(bit,val) (((val) >> (bit)) & 0x01)
/* Define some macros to access ETRAX 100 registers */
#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
IO_FIELD_(reg##_, field##_, val)
#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
IO_STATE_(reg##_, field##_, _##val)
static etrax_eth_descr *myNextRxDesc; /* Points to the next descriptor to
to be processed */
static etrax_eth_descr *myLastRxDesc; /* The last processed descriptor */
static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */
static etrax_eth_descr* myLastTxDesc; /* End of send queue */
static etrax_eth_descr* myNextTxDesc; /* Next descriptor to use */
static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
static unsigned int network_rec_config_shadow = 0;
static unsigned int network_tr_ctrl_shadow = 0;
/* Network speed indication. */
static DEFINE_TIMER(speed_timer, NULL, 0, 0);
static DEFINE_TIMER(clear_led_timer, NULL, 0, 0);
static int current_speed; /* Speed read from transceiver */
static int current_speed_selection; /* Speed selected by user */
static unsigned long led_next_time;
static int led_active;
static int rx_queue_len;
/* Duplex */
static DEFINE_TIMER(duplex_timer, NULL, 0, 0);
static int full_duplex;
static enum duplex current_duplex;
/* Index to functions, as function prototypes. */
static int etrax_ethernet_init(void);
static int e100_open(struct net_device *dev);
static int e100_set_mac_address(struct net_device *dev, void *addr);
static int e100_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id);
static irqreturn_t e100nw_interrupt(int irq, void *dev_id);
static void e100_rx(struct net_device *dev);
static int e100_close(struct net_device *dev);
static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static int e100_set_config(struct net_device* dev, struct ifmap* map);
static void e100_tx_timeout(struct net_device *dev);
static struct net_device_stats *e100_get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
static void update_rx_stats(struct net_device_stats *);
static void update_tx_stats(struct net_device_stats *);
static int e100_probe_transceiver(struct net_device* dev);
static void e100_check_speed(unsigned long priv);
static void e100_set_speed(struct net_device* dev, unsigned long speed);
static void e100_check_duplex(unsigned long priv);
static void e100_set_duplex(struct net_device* dev, enum duplex);
static void e100_negotiate(struct net_device* dev);
static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location);
static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value);
static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd);
static void e100_send_mdio_bit(unsigned char bit);
static unsigned char e100_receive_mdio_bit(void);
static void e100_reset_transceiver(struct net_device* net);
static void e100_clear_network_leds(unsigned long dummy);
static void e100_set_network_leds(int active);
static const struct ethtool_ops e100_ethtool_ops;
#if defined(CONFIG_ETRAX_NO_PHY)
static void dummy_check_speed(struct net_device* dev);
static void dummy_check_duplex(struct net_device* dev);
#else
static void broadcom_check_speed(struct net_device* dev);
static void broadcom_check_duplex(struct net_device* dev);
static void tdk_check_speed(struct net_device* dev);
static void tdk_check_duplex(struct net_device* dev);
static void intel_check_speed(struct net_device* dev);
static void intel_check_duplex(struct net_device* dev);
static void generic_check_speed(struct net_device* dev);
static void generic_check_duplex(struct net_device* dev);
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
static void e100_netpoll(struct net_device* dev);
#endif
static int autoneg_normal = 1;
struct transceiver_ops transceivers[] =
{
#if defined(CONFIG_ETRAX_NO_PHY)
{0x0000, dummy_check_speed, dummy_check_duplex} /* Dummy */
#else
{0x1018, broadcom_check_speed, broadcom_check_duplex}, /* Broadcom */
{0xC039, tdk_check_speed, tdk_check_duplex}, /* TDK 2120 */
{0x039C, tdk_check_speed, tdk_check_duplex}, /* TDK 2120C */
{0x04de, intel_check_speed, intel_check_duplex}, /* Intel LXT972A*/
{0x0000, generic_check_speed, generic_check_duplex} /* Generic, must be last */
#endif
};
struct transceiver_ops* transceiver = &transceivers[0];
static const struct net_device_ops e100_netdev_ops = {
.ndo_open = e100_open,
.ndo_stop = e100_close,
.ndo_start_xmit = e100_send_packet,
.ndo_tx_timeout = e100_tx_timeout,
.ndo_get_stats = e100_get_stats,
.ndo_set_rx_mode = set_multicast_list,
.ndo_do_ioctl = e100_ioctl,
.ndo_set_mac_address = e100_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_config = e100_set_config,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = e100_netpoll,
#endif
};
#define tx_done(dev) (*R_DMA_CH0_CMD == 0)
/*
* Check for a network adaptor of this type, and return '0' if one exists.
* If dev->base_addr == 0, probe all likely locations.
* If dev->base_addr == 1, always return failure.
* If dev->base_addr == 2, allocate space for the device and return success
* (detachable devices only).
*/
static int __init
etrax_ethernet_init(void)
{
struct net_device *dev;
struct net_local* np;
int i, err;
printk(KERN_INFO
"ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2007 Axis Communications AB\n");
if (cris_request_io_interface(if_eth, cardname)) {
printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
return -EBUSY;
}
dev = alloc_etherdev(sizeof(struct net_local));
if (!dev)
return -ENOMEM;
np = netdev_priv(dev);
/* we do our own locking */
dev->features |= NETIF_F_LLTX;
dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
/* now setup our etrax specific stuff */
dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */
dev->dma = NETWORK_RX_DMA_NBR;
/* fill in our handlers so the network layer can talk to us in the future */
dev->ethtool_ops = &e100_ethtool_ops;
dev->netdev_ops = &e100_netdev_ops;
spin_lock_init(&np->lock);
spin_lock_init(&np->led_lock);
spin_lock_init(&np->transceiver_lock);
/* Initialise the list of Etrax DMA-descriptors */
/* Initialise receive descriptors */
for (i = 0; i < NBR_OF_RX_DESC; i++) {
/* Allocate two extra cachelines to make sure that buffer used
* by DMA does not share cacheline with any other data (to
* avoid cache bug)
*/
RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
if (!RxDescList[i].skb)
return -ENOMEM;
RxDescList[i].descr.ctrl = 0;
RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
RxDescList[i].descr.next = virt_to_phys(&RxDescList[i + 1]);
RxDescList[i].descr.buf = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
RxDescList[i].descr.status = 0;
RxDescList[i].descr.hw_len = 0;
prepare_rx_descriptor(&RxDescList[i].descr);
}
RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl = d_eol;
RxDescList[NBR_OF_RX_DESC - 1].descr.next = virt_to_phys(&RxDescList[0]);
rx_queue_len = 0;
/* Initialize transmit descriptors */
for (i = 0; i < NBR_OF_TX_DESC; i++) {
TxDescList[i].descr.ctrl = 0;
TxDescList[i].descr.sw_len = 0;
TxDescList[i].descr.next = virt_to_phys(&TxDescList[i + 1].descr);
TxDescList[i].descr.buf = 0;
TxDescList[i].descr.status = 0;
TxDescList[i].descr.hw_len = 0;
TxDescList[i].skb = 0;
}
TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl = d_eol;
TxDescList[NBR_OF_TX_DESC - 1].descr.next = virt_to_phys(&TxDescList[0].descr);
/* Initialise initial pointers */
myNextRxDesc = &RxDescList[0];
myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
myFirstTxDesc = &TxDescList[0];
myNextTxDesc = &TxDescList[0];
myLastTxDesc = &TxDescList[NBR_OF_TX_DESC - 1];
/* Register device */
err = register_netdev(dev);
if (err) {
free_netdev(dev);
return err;
}
/* set the default MAC address */
e100_set_mac_address(dev, &default_mac);
/* Initialize speed indicator stuff. */
current_speed = 10;
current_speed_selection = 0; /* Auto */
speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
speed_timer.data = (unsigned long)dev;
speed_timer.function = e100_check_speed;
clear_led_timer.function = e100_clear_network_leds;
clear_led_timer.data = (unsigned long)dev;
full_duplex = 0;
current_duplex = autoneg;
duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
duplex_timer.data = (unsigned long)dev;
duplex_timer.function = e100_check_duplex;
/* Initialize mii interface */
np->mii_if.phy_id_mask = 0x1f;
np->mii_if.reg_num_mask = 0x1f;
np->mii_if.dev = dev;
np->mii_if.mdio_read = e100_get_mdio_reg;
np->mii_if.mdio_write = e100_set_mdio_reg;
/* Initialize group address registers to make sure that no */
/* unwanted addresses are matched */
*R_NETWORK_GA_0 = 0x00000000;
*R_NETWORK_GA_1 = 0x00000000;
/* Initialize next time the led can flash */
led_next_time = jiffies;
return 0;
}
device_initcall(etrax_ethernet_init)
/* set MAC address of the interface. called from the core after a
* SIOCSIFADDR ioctl, and from the bootup above.
*/
static int
e100_set_mac_address(struct net_device *dev, void *p)
{
struct net_local *np = netdev_priv(dev);
struct sockaddr *addr = p;
spin_lock(&np->lock); /* preemption protection */
/* remember it */
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
/* Write it to the hardware.
* Note the way the address is wrapped:
* *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
* *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8);
*/
*R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
(dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
*R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
*R_NETWORK_SA_2 = 0;
/* show it in the log as well */
printk(KERN_INFO "%s: changed MAC to %pM\n", dev->name, dev->dev_addr);
spin_unlock(&np->lock);
return 0;
}
/*
* Open/initialize the board. This is called (in the current kernel)
* sometime after booting when the 'ifconfig' program is run.
*
* This routine should set everything up anew at each open, even
* registers that "should" only need to be set once at boot, so that
* there is non-reboot way to recover if something goes wrong.
*/
static int
e100_open(struct net_device *dev)
{
unsigned long flags;
/* enable the MDIO output pin */
*R_NETWORK_MGM_CTRL = IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable);
*R_IRQ_MASK0_CLR =
IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
/* clear dma0 and 1 eop and descr irq masks */
*R_IRQ_MASK2_CLR =
IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
/* Reset and wait for the DMA channels */
RESET_DMA(NETWORK_TX_DMA_NBR);
RESET_DMA(NETWORK_RX_DMA_NBR);
WAIT_DMA(NETWORK_TX_DMA_NBR);
WAIT_DMA(NETWORK_RX_DMA_NBR);
/* Initialise the etrax network controller */
/* allocate the irq corresponding to the receiving DMA */
if (request_irq(NETWORK_DMA_RX_IRQ_NBR, e100rxtx_interrupt, 0, cardname,
(void *)dev)) {
goto grace_exit0;
}
/* allocate the irq corresponding to the transmitting DMA */
if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0,
cardname, (void *)dev)) {
goto grace_exit1;
}
/* allocate the irq corresponding to the network errors etc */
if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0,
cardname, (void *)dev)) {
goto grace_exit2;
}
/*
* Always allocate the DMA channels after the IRQ,
* and clean up on failure.
*/
if (cris_request_dma(NETWORK_TX_DMA_NBR,
cardname,
DMA_VERBOSE_ON_ERROR,
dma_eth)) {
goto grace_exit3;
}
if (cris_request_dma(NETWORK_RX_DMA_NBR,
cardname,
DMA_VERBOSE_ON_ERROR,
dma_eth)) {
goto grace_exit4;
}
/* give the HW an idea of what MAC address we want */
*R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
(dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
*R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
*R_NETWORK_SA_2 = 0;
#if 0
/* use promiscuous mode for testing */
*R_NETWORK_GA_0 = 0xffffffff;
*R_NETWORK_GA_1 = 0xffffffff;
*R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */
#else
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, max_size, size1522);
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive);
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable);
SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
#endif
*R_NETWORK_GEN_CONFIG =
IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk) |
IO_STATE(R_NETWORK_GEN_CONFIG, enable, on);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, delay, none);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cancel, dont);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cd, enable);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, retry, enable);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, pad, enable);
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable);
*R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
local_irq_save(flags);
/* enable the irq's for ethernet DMA */
*R_IRQ_MASK2_SET =
IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) |
IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set);
*R_IRQ_MASK0_SET =
IO_STATE(R_IRQ_MASK0_SET, overrun, set) |
IO_STATE(R_IRQ_MASK0_SET, underrun, set) |
IO_STATE(R_IRQ_MASK0_SET, excessive_col, set);
/* make sure the irqs are cleared */
*R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
*R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
/* make sure the rec and transmit error counters are cleared */
(void)*R_REC_COUNTERS; /* dummy read */
(void)*R_TR_COUNTERS; /* dummy read */
/* start the receiving DMA channel so we can receive packets from now on */
*R_DMA_CH1_FIRST = virt_to_phys(myNextRxDesc);
*R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, start);
/* Set up transmit DMA channel so it can be restarted later */
*R_DMA_CH0_FIRST = 0;
*R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
netif_start_queue(dev);
local_irq_restore(flags);
/* Probe for transceiver */
if (e100_probe_transceiver(dev))
goto grace_exit5;
/* Start duplex/speed timers */
add_timer(&speed_timer);
add_timer(&duplex_timer);
/* We are now ready to accept transmit requeusts from
* the queueing layer of the networking.
*/
netif_carrier_on(dev);
return 0;
grace_exit5:
cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
grace_exit4:
cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
grace_exit3:
free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
grace_exit2:
free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
grace_exit1:
free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
grace_exit0:
return -EAGAIN;
}
#if defined(CONFIG_ETRAX_NO_PHY)
static void
dummy_check_speed(struct net_device* dev)
{
current_speed = 100;
}
#else
static void
generic_check_speed(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
if ((data & ADVERTISE_100FULL) ||
(data & ADVERTISE_100HALF))
current_speed = 100;
else
current_speed = 10;
}
static void
tdk_check_speed(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_TDK_DIAGNOSTIC_REG);
current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10);
}
static void
broadcom_check_speed(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_AUX_CTRL_STATUS_REG);
current_speed = (data & MDIO_BC_SPEED ? 100 : 10);
}
static void
intel_check_speed(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_INT_STATUS_REG_2);
current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
}
#endif
static void
e100_check_speed(unsigned long priv)
{
struct net_device* dev = (struct net_device*)priv;
struct net_local *np = netdev_priv(dev);
static int led_initiated = 0;
unsigned long data;
int old_speed = current_speed;
spin_lock(&np->transceiver_lock);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMSR);
if (!(data & BMSR_LSTATUS)) {
current_speed = 0;
} else {
transceiver->check_speed(dev);
}
spin_lock(&np->led_lock);
if ((old_speed != current_speed) || !led_initiated) {
led_initiated = 1;
e100_set_network_leds(NO_NETWORK_ACTIVITY);
if (current_speed)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
}
spin_unlock(&np->led_lock);
/* Reinitialize the timer. */
speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
add_timer(&speed_timer);
spin_unlock(&np->transceiver_lock);
}
static void
e100_negotiate(struct net_device* dev)
{
struct net_local *np = netdev_priv(dev);
unsigned short data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MII_ADVERTISE);
/* Discard old speed and duplex settings */
data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL |
ADVERTISE_10HALF | ADVERTISE_10FULL);
switch (current_speed_selection) {
case 10:
if (current_duplex == full)
data |= ADVERTISE_10FULL;
else if (current_duplex == half)
data |= ADVERTISE_10HALF;
else
data |= ADVERTISE_10HALF | ADVERTISE_10FULL;
break;
case 100:
if (current_duplex == full)
data |= ADVERTISE_100FULL;
else if (current_duplex == half)
data |= ADVERTISE_100HALF;
else
data |= ADVERTISE_100HALF | ADVERTISE_100FULL;
break;
case 0: /* Auto */
if (current_duplex == full)
data |= ADVERTISE_100FULL | ADVERTISE_10FULL;
else if (current_duplex == half)
data |= ADVERTISE_100HALF | ADVERTISE_10HALF;
else
data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
ADVERTISE_100HALF | ADVERTISE_100FULL;
break;
default: /* assume autoneg speed and duplex */
data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
ADVERTISE_100HALF | ADVERTISE_100FULL;
break;
}
e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE, data);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
if (autoneg_normal) {
/* Renegotiate with link partner */
data |= BMCR_ANENABLE | BMCR_ANRESTART;
} else {
/* Don't negotiate speed or duplex */
data &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
/* Set speed and duplex static */
if (current_speed_selection == 10)
data &= ~BMCR_SPEED100;
else
data |= BMCR_SPEED100;
if (current_duplex != full)
data &= ~BMCR_FULLDPLX;
else
data |= BMCR_FULLDPLX;
}
e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR, data);
}
static void
e100_set_speed(struct net_device* dev, unsigned long speed)
{
struct net_local *np = netdev_priv(dev);
spin_lock(&np->transceiver_lock);
if (speed != current_speed_selection) {
current_speed_selection = speed;
e100_negotiate(dev);
}
spin_unlock(&np->transceiver_lock);
}
static void
e100_check_duplex(unsigned long priv)
{
struct net_device *dev = (struct net_device *)priv;
struct net_local *np = netdev_priv(dev);
int old_duplex;
spin_lock(&np->transceiver_lock);
old_duplex = full_duplex;
transceiver->check_duplex(dev);
if (old_duplex != full_duplex) {
/* Duplex changed */
SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
}
/* Reinitialize the timer. */
duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
add_timer(&duplex_timer);
np->mii_if.full_duplex = full_duplex;
spin_unlock(&np->transceiver_lock);
}
#if defined(CONFIG_ETRAX_NO_PHY)
static void
dummy_check_duplex(struct net_device* dev)
{
full_duplex = 1;
}
#else
static void
generic_check_duplex(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
if ((data & ADVERTISE_10FULL) ||
(data & ADVERTISE_100FULL))
full_duplex = 1;
else
full_duplex = 0;
}
static void
tdk_check_duplex(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_TDK_DIAGNOSTIC_REG);
full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
}
static void
broadcom_check_duplex(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_AUX_CTRL_STATUS_REG);
full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
}
static void
intel_check_duplex(struct net_device* dev)
{
unsigned long data;
struct net_local *np = netdev_priv(dev);
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
MDIO_INT_STATUS_REG_2);
full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
}
#endif
static void
e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
{
struct net_local *np = netdev_priv(dev);
spin_lock(&np->transceiver_lock);
if (new_duplex != current_duplex) {
current_duplex = new_duplex;
e100_negotiate(dev);
}
spin_unlock(&np->transceiver_lock);
}
static int
e100_probe_transceiver(struct net_device* dev)
{
int ret = 0;
#if !defined(CONFIG_ETRAX_NO_PHY)
unsigned int phyid_high;
unsigned int phyid_low;
unsigned int oui;
struct transceiver_ops* ops = NULL;
struct net_local *np = netdev_priv(dev);
spin_lock(&np->transceiver_lock);
/* Probe MDIO physical address */
for (np->mii_if.phy_id = 0; np->mii_if.phy_id <= 31;
np->mii_if.phy_id++) {
if (e100_get_mdio_reg(dev,
np->mii_if.phy_id, MII_BMSR) != 0xffff)
break;
}
if (np->mii_if.phy_id == 32) {
ret = -ENODEV;
goto out;
}
/* Get manufacturer */
phyid_high = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID1);
phyid_low = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID2);
oui = (phyid_high << 6) | (phyid_low >> 10);
for (ops = &transceivers[0]; ops->oui; ops++) {
if (ops->oui == oui)
break;
}
transceiver = ops;
out:
spin_unlock(&np->transceiver_lock);
#endif
return ret;
}
static int
e100_get_mdio_reg(struct net_device *dev, int phy_id, int location)
{
unsigned short cmd; /* Data to be sent on MDIO port */
int data; /* Data read from MDIO */
int bitCounter;
/* Start of frame, OP Code, Physical Address, Register Address */
cmd = (MDIO_START << 14) | (MDIO_READ << 12) | (phy_id << 7) |
(location << 2);
e100_send_mdio_cmd(cmd, 0);
data = 0;
/* Data... */
for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
data |= (e100_receive_mdio_bit() << bitCounter);
}
return data;
}
static void
e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value)
{
int bitCounter;
unsigned short cmd;
cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (phy_id << 7) |
(location << 2);
e100_send_mdio_cmd(cmd, 1);
/* Data... */
for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
e100_send_mdio_bit(GET_BIT(bitCounter, value));
}
}
static void
e100_send_mdio_cmd(unsigned short cmd, int write_cmd)
{
int bitCounter;
unsigned char data = 0x2;
/* Preamble */
for (bitCounter = 31; bitCounter>= 0; bitCounter--)
e100_send_mdio_bit(GET_BIT(bitCounter, MDIO_PREAMBLE));
for (bitCounter = 15; bitCounter >= 2; bitCounter--)
e100_send_mdio_bit(GET_BIT(bitCounter, cmd));
/* Turnaround */
for (bitCounter = 1; bitCounter >= 0 ; bitCounter--)
if (write_cmd)
e100_send_mdio_bit(GET_BIT(bitCounter, data));
else
e100_receive_mdio_bit();
}
static void
e100_send_mdio_bit(unsigned char bit)
{
*R_NETWORK_MGM_CTRL =
IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
udelay(1);
*R_NETWORK_MGM_CTRL =
IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
IO_MASK(R_NETWORK_MGM_CTRL, mdck) |
IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
udelay(1);
}
static unsigned char
e100_receive_mdio_bit(void)
{
unsigned char bit;
*R_NETWORK_MGM_CTRL = 0;
bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT);
udelay(1);
*R_NETWORK_MGM_CTRL = IO_MASK(R_NETWORK_MGM_CTRL, mdck);
udelay(1);
return bit;
}
static void
e100_reset_transceiver(struct net_device* dev)
{
struct net_local *np = netdev_priv(dev);
unsigned short cmd;
unsigned short data;
int bitCounter;
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (np->mii_if.phy_id << 7) | (MII_BMCR << 2);
e100_send_mdio_cmd(cmd, 1);
data |= 0x8000;
for (bitCounter = 15; bitCounter >= 0 ; bitCounter--) {
e100_send_mdio_bit(GET_BIT(bitCounter, data));
}
}
/* Called by upper layers if they decide it took too long to complete
* sending a packet - we need to reset and stuff.
*/
static void
e100_tx_timeout(struct net_device *dev)
{
struct net_local *np = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&np->lock, flags);
printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
tx_done(dev) ? "IRQ problem" : "network cable problem");
/* remember we got an error */
dev->stats.tx_errors++;
/* reset the TX DMA in case it has hung on something */
RESET_DMA(NETWORK_TX_DMA_NBR);
WAIT_DMA(NETWORK_TX_DMA_NBR);
/* Reset the transceiver. */
e100_reset_transceiver(dev);
/* and get rid of the packets that never got an interrupt */
while (myFirstTxDesc != myNextTxDesc) {
dev_kfree_skb(myFirstTxDesc->skb);
myFirstTxDesc->skb = 0;
myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
}
/* Set up transmit DMA channel so it can be restarted later */
*R_DMA_CH0_FIRST = 0;
*R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
/* tell the upper layers we're ok again */
netif_wake_queue(dev);
spin_unlock_irqrestore(&np->lock, flags);
}
/* This will only be invoked if the driver is _not_ in XOFF state.
* What this means is that we need not check it, and that this
* invariant will hold if we make sure that the netif_*_queue()
* calls are done at the proper times.
*/
static int
e100_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct net_local *np = netdev_priv(dev);
unsigned char *buf = skb->data;
unsigned long flags;
#ifdef ETHDEBUG
printk("send packet len %d\n", length);
#endif
spin_lock_irqsave(&np->lock, flags); /* protect from tx_interrupt and ourself */
myNextTxDesc->skb = skb;
netif_trans_update(dev); /* NETIF_F_LLTX driver :( */
e100_hardware_send_packet(np, buf, skb->len);
myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next);
/* Stop queue if full */
if (myNextTxDesc == myFirstTxDesc) {
netif_stop_queue(dev);
}
spin_unlock_irqrestore(&np->lock, flags);
return NETDEV_TX_OK;
}
/*
* The typical workload of the driver:
* Handle the network interface interrupts.
*/
static irqreturn_t
e100rxtx_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
unsigned long irqbits;
/*
* Note that both rx and tx interrupts are blocked at this point,
* regardless of which got us here.
*/
irqbits = *R_IRQ_MASK2_RD;
/* Handle received packets */
if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) {
/* acknowledge the eop interrupt */
*R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
/* check if one or more complete packets were indeed received */
while ((*R_DMA_CH1_FIRST != virt_to_phys(myNextRxDesc)) &&
(myNextRxDesc != myLastRxDesc)) {
/* Take out the buffer and give it to the OS, then
* allocate a new buffer to put a packet in.
*/
e100_rx(dev);
dev->stats.rx_packets++;
/* restart/continue on the channel, for safety */
*R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart);
/* clear dma channel 1 eop/descr irq bits */
*R_DMA_CH1_CLR_INTR =
IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do) |
IO_STATE(R_DMA_CH1_CLR_INTR, clr_descr, do);
/* now, we might have gotten another packet
so we have to loop back and check if so */
}
}
/* Report any packets that have been sent */
while (virt_to_phys(myFirstTxDesc) != *R_DMA_CH0_FIRST &&
(netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
dev->stats.tx_bytes += myFirstTxDesc->skb->len;
dev->stats.tx_packets++;
/* dma is ready with the transmission of the data in tx_skb, so now
we can release the skb memory */
dev_kfree_skb_irq(myFirstTxDesc->skb);
myFirstTxDesc->skb = 0;
myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
/* Wake up queue. */
netif_wake_queue(dev);
}
if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
/* acknowledge the eop interrupt. */
*R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
}
return IRQ_HANDLED;
}
static irqreturn_t
e100nw_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
unsigned long irqbits = *R_IRQ_MASK0_RD;
/* check for underrun irq */
if (irqbits & IO_STATE(R_IRQ_MASK0_RD, underrun, active)) {
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
*R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
dev->stats.tx_errors++;
D(printk("ethernet receiver underrun!\n"));
}
/* check for overrun irq */
if (irqbits & IO_STATE(R_IRQ_MASK0_RD, overrun, active)) {
update_rx_stats(&dev->stats); /* this will ack the irq */
D(printk("ethernet receiver overrun!\n"));
}
/* check for excessive collision irq */
if (irqbits & IO_STATE(R_IRQ_MASK0_RD, excessive_col, active)) {
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
*R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
dev->stats.tx_errors++;
D(printk("ethernet excessive collisions!\n"));
}
return IRQ_HANDLED;
}
/* We have a good packet(s), get it/them out of the buffers. */
static void
e100_rx(struct net_device *dev)
{
struct sk_buff *skb;
int length = 0;
struct net_local *np = netdev_priv(dev);
unsigned char *skb_data_ptr;
#ifdef ETHDEBUG
int i;
#endif
etrax_eth_descr *prevRxDesc; /* The descriptor right before myNextRxDesc */
spin_lock(&np->led_lock);
if (!led_active && time_after(jiffies, led_next_time)) {
/* light the network leds depending on the current speed. */
e100_set_network_leds(NETWORK_ACTIVITY);
/* Set the earliest time we may clear the LED */
led_next_time = jiffies + NET_FLASH_TIME;
led_active = 1;
mod_timer(&clear_led_timer, jiffies + HZ/10);
}
spin_unlock(&np->led_lock);
length = myNextRxDesc->descr.hw_len - 4;
dev->stats.rx_bytes += length;
#ifdef ETHDEBUG
printk("Got a packet of length %d:\n", length);
/* dump the first bytes in the packet */
skb_data_ptr = (unsigned char *)phys_to_virt(myNextRxDesc->descr.buf);
for (i = 0; i < 8; i++) {
printk("%d: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", i * 8,
skb_data_ptr[0],skb_data_ptr[1],skb_data_ptr[2],skb_data_ptr[3],
skb_data_ptr[4],skb_data_ptr[5],skb_data_ptr[6],skb_data_ptr[7]);
skb_data_ptr += 8;
}
#endif
if (length < RX_COPYBREAK) {
/* Small packet, copy data */
skb = dev_alloc_skb(length - ETHER_HEAD_LEN);
if (!skb) {
dev->stats.rx_errors++;
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
goto update_nextrxdesc;
}
skb_put(skb, length - ETHER_HEAD_LEN); /* allocate room for the packet body */
skb_data_ptr = skb_push(skb, ETHER_HEAD_LEN); /* allocate room for the header */
#ifdef ETHDEBUG
printk("head = 0x%x, data = 0x%x, tail = 0x%x, end = 0x%x\n",
skb->head, skb->data, skb_tail_pointer(skb),
skb_end_pointer(skb));
printk("copying packet to 0x%x.\n", skb_data_ptr);
#endif
memcpy(skb_data_ptr, phys_to_virt(myNextRxDesc->descr.buf), length);
}
else {
/* Large packet, send directly to upper layers and allocate new
* memory (aligned to cache line boundary to avoid bug).
* Before sending the skb to upper layers we must make sure
* that skb->data points to the aligned start of the packet.
*/
int align;
struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
if (!new_skb) {
dev->stats.rx_errors++;
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
goto update_nextrxdesc;
}
skb = myNextRxDesc->skb;
align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data;
skb_put(skb, length + align);
skb_pull(skb, align); /* Remove alignment bytes */
myNextRxDesc->skb = new_skb;
myNextRxDesc->descr.buf = L1_CACHE_ALIGN(virt_to_phys(myNextRxDesc->skb->data));
}
skb->protocol = eth_type_trans(skb, dev);
/* Send the packet to the upper layers */
netif_rx(skb);
update_nextrxdesc:
/* Prepare for next packet */
myNextRxDesc->descr.status = 0;
prevRxDesc = myNextRxDesc;
myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next);
rx_queue_len++;
/* Check if descriptors should be returned */
if (rx_queue_len == RX_QUEUE_THRESHOLD) {
flush_etrax_cache();
prevRxDesc->descr.ctrl |= d_eol;
myLastRxDesc->descr.ctrl &= ~d_eol;
myLastRxDesc = prevRxDesc;
rx_queue_len = 0;
}
}
/* The inverse routine to net_open(). */
static int
e100_close(struct net_device *dev)
{
printk(KERN_INFO "Closing %s.\n", dev->name);
netif_stop_queue(dev);
*R_IRQ_MASK0_CLR =
IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
*R_IRQ_MASK2_CLR =
IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
/* Stop the receiver and the transmitter */
RESET_DMA(NETWORK_TX_DMA_NBR);
RESET_DMA(NETWORK_RX_DMA_NBR);
/* Flush the Tx and disable Rx here. */
free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
/* Update the statistics here. */
update_rx_stats(&dev->stats);
update_tx_stats(&dev->stats);
/* Stop speed/duplex timers */
del_timer(&speed_timer);
del_timer(&duplex_timer);
return 0;
}
static int
e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct mii_ioctl_data *data = if_mii(ifr);
struct net_local *np = netdev_priv(dev);
int rc = 0;
int old_autoneg;
spin_lock(&np->lock); /* Preempt protection */
switch (cmd) {
/* The ioctls below should be considered obsolete but are */
/* still present for compatibility with old scripts/apps */
case SET_ETH_SPEED_10: /* 10 Mbps */
e100_set_speed(dev, 10);
break;
case SET_ETH_SPEED_100: /* 100 Mbps */
e100_set_speed(dev, 100);
break;
case SET_ETH_SPEED_AUTO: /* Auto-negotiate speed */
e100_set_speed(dev, 0);
break;
case SET_ETH_DUPLEX_HALF: /* Half duplex */
e100_set_duplex(dev, half);
break;
case SET_ETH_DUPLEX_FULL: /* Full duplex */
e100_set_duplex(dev, full);
break;
case SET_ETH_DUPLEX_AUTO: /* Auto-negotiate duplex */
e100_set_duplex(dev, autoneg);
break;
case SET_ETH_AUTONEG:
old_autoneg = autoneg_normal;
autoneg_normal = *(int*)data;
if (autoneg_normal != old_autoneg)
e100_negotiate(dev);
break;
default:
rc = generic_mii_ioctl(&np->mii_if, if_mii(ifr),
cmd, NULL);
break;
}
spin_unlock(&np->lock);
return rc;
}
static int e100_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct net_local *np = netdev_priv(dev);
u32 supported;
spin_lock_irq(&np->lock);
mii_ethtool_get_link_ksettings(&np->mii_if, cmd);
spin_unlock_irq(&np->lock);
/* The PHY may support 1000baseT, but the Etrax100 does not. */
ethtool_convert_link_mode_to_legacy_u32(&supported,
cmd->link_modes.supported);
supported &= ~(SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full);
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
return 0;
}
static int e100_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *ecmd)
{
if (ecmd->base.autoneg == AUTONEG_ENABLE) {
e100_set_duplex(dev, autoneg);
e100_set_speed(dev, 0);
} else {
e100_set_duplex(dev, ecmd->base.duplex == DUPLEX_HALF ?
half : full);
e100_set_speed(dev, ecmd->base.speed == SPEED_10 ? 10 : 100);
}
return 0;
}
static void e100_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, "ETRAX 100LX", sizeof(info->driver));
strlcpy(info->version, "$Revision: 1.31 $", sizeof(info->version));
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
}
static int e100_nway_reset(struct net_device *dev)
{
if (current_duplex == autoneg && current_speed_selection == 0)
e100_negotiate(dev);
return 0;
}
static const struct ethtool_ops e100_ethtool_ops = {
.get_drvinfo = e100_get_drvinfo,
.nway_reset = e100_nway_reset,
.get_link = ethtool_op_get_link,
.get_link_ksettings = e100_get_link_ksettings,
.set_link_ksettings = e100_set_link_ksettings,
};
static int
e100_set_config(struct net_device *dev, struct ifmap *map)
{
struct net_local *np = netdev_priv(dev);
spin_lock(&np->lock); /* Preempt protection */
switch(map->port) {
case IF_PORT_UNKNOWN:
/* Use autoneg */
e100_set_speed(dev, 0);
e100_set_duplex(dev, autoneg);
break;
case IF_PORT_10BASET:
e100_set_speed(dev, 10);
e100_set_duplex(dev, autoneg);
break;
case IF_PORT_100BASET:
case IF_PORT_100BASETX:
e100_set_speed(dev, 100);
e100_set_duplex(dev, autoneg);
break;
case IF_PORT_100BASEFX:
case IF_PORT_10BASE2:
case IF_PORT_AUI:
spin_unlock(&np->lock);
return -EOPNOTSUPP;
default:
printk(KERN_ERR "%s: Invalid media selected", dev->name);
spin_unlock(&np->lock);
return -EINVAL;
}
spin_unlock(&np->lock);
return 0;
}
static void
update_rx_stats(struct net_device_stats *es)
{
unsigned long r = *R_REC_COUNTERS;
/* update stats relevant to reception errors */
es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r);
es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r);
es->rx_frame_errors += IO_EXTRACT(R_REC_COUNTERS, alignment_error, r);
es->rx_length_errors += IO_EXTRACT(R_REC_COUNTERS, oversize, r);
}
static void
update_tx_stats(struct net_device_stats *es)
{
unsigned long r = *R_TR_COUNTERS;
/* update stats relevant to transmission errors */
es->collisions +=
IO_EXTRACT(R_TR_COUNTERS, single_col, r) +
IO_EXTRACT(R_TR_COUNTERS, multiple_col, r);
}
/*
* Get the current statistics.
* This may be called with the card open or closed.
*/
static struct net_device_stats *
e100_get_stats(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&lp->lock, flags);
update_rx_stats(&dev->stats);
update_tx_stats(&dev->stats);
spin_unlock_irqrestore(&lp->lock, flags);
return &dev->stats;
}
/*
* Set or clear the multicast filter for this adaptor.
* num_addrs == -1 Promiscuous mode, receive all packets
* num_addrs == 0 Normal mode, clear multicast list
* num_addrs > 0 Multicast mode, receive normal and MC packets,
* and do best-effort filtering.
*/
static void
set_multicast_list(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
int num_addr = netdev_mc_count(dev);
unsigned long int lo_bits;
unsigned long int hi_bits;
spin_lock(&lp->lock);
if (dev->flags & IFF_PROMISC) {
/* promiscuous mode */
lo_bits = 0xfffffffful;
hi_bits = 0xfffffffful;
/* Enable individual receive */
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, receive);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
} else if (dev->flags & IFF_ALLMULTI) {
/* enable all multicasts */
lo_bits = 0xfffffffful;
hi_bits = 0xfffffffful;
/* Disable individual receive */
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
} else if (num_addr == 0) {
/* Normal, clear the mc list */
lo_bits = 0x00000000ul;
hi_bits = 0x00000000ul;
/* Disable individual receive */
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
} else {
/* MC mode, receive normal and MC packets */
char hash_ix;
struct netdev_hw_addr *ha;
char *baddr;
lo_bits = 0x00000000ul;
hi_bits = 0x00000000ul;
netdev_for_each_mc_addr(ha, dev) {
/* Calculate the hash index for the GA registers */
hash_ix = 0;
baddr = ha->addr;
hash_ix ^= (*baddr) & 0x3f;
hash_ix ^= ((*baddr) >> 6) & 0x03;
++baddr;
hash_ix ^= ((*baddr) << 2) & 0x03c;
hash_ix ^= ((*baddr) >> 4) & 0xf;
++baddr;
hash_ix ^= ((*baddr) << 4) & 0x30;
hash_ix ^= ((*baddr) >> 2) & 0x3f;
++baddr;
hash_ix ^= (*baddr) & 0x3f;
hash_ix ^= ((*baddr) >> 6) & 0x03;
++baddr;
hash_ix ^= ((*baddr) << 2) & 0x03c;
hash_ix ^= ((*baddr) >> 4) & 0xf;
++baddr;
hash_ix ^= ((*baddr) << 4) & 0x30;
hash_ix ^= ((*baddr) >> 2) & 0x3f;
hash_ix &= 0x3f;
if (hash_ix >= 32) {
hi_bits |= (1 << (hash_ix-32));
} else {
lo_bits |= (1 << hash_ix);
}
}
/* Disable individual receive */
SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
*R_NETWORK_REC_CONFIG = network_rec_config_shadow;
}
*R_NETWORK_GA_0 = lo_bits;
*R_NETWORK_GA_1 = hi_bits;
spin_unlock(&lp->lock);
}
void
e100_hardware_send_packet(struct net_local *np, char *buf, int length)
{
D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
spin_lock(&np->led_lock);
if (!led_active && time_after(jiffies, led_next_time)) {
/* light the network leds depending on the current speed. */
e100_set_network_leds(NETWORK_ACTIVITY);
/* Set the earliest time we may clear the LED */
led_next_time = jiffies + NET_FLASH_TIME;
led_active = 1;
mod_timer(&clear_led_timer, jiffies + HZ/10);
}
spin_unlock(&np->led_lock);
/* configure the tx dma descriptor */
myNextTxDesc->descr.sw_len = length;
myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait;
myNextTxDesc->descr.buf = virt_to_phys(buf);
/* Move end of list */
myLastTxDesc->descr.ctrl &= ~d_eol;
myLastTxDesc = myNextTxDesc;
/* Restart DMA channel */
*R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart);
}
static void
e100_clear_network_leds(unsigned long dummy)
{
struct net_device *dev = (struct net_device *)dummy;
struct net_local *np = netdev_priv(dev);
spin_lock(&np->led_lock);
if (led_active && time_after(jiffies, led_next_time)) {
e100_set_network_leds(NO_NETWORK_ACTIVITY);
/* Set the earliest time we may set the LED */
led_next_time = jiffies + NET_FLASH_PAUSE;
led_active = 0;
}
spin_unlock(&np->led_lock);
}
static void
e100_set_network_leds(int active)
{
#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK)
int light_leds = (active == NO_NETWORK_ACTIVITY);
#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY)
int light_leds = (active == NETWORK_ACTIVITY);
#else
#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY"
#endif
if (!current_speed) {
/* Make LED red, link is down */
CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
} else if (light_leds) {
if (current_speed == 10) {
CRIS_LED_NETWORK_SET(CRIS_LED_ORANGE);
} else {
CRIS_LED_NETWORK_SET(CRIS_LED_GREEN);
}
} else {
CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
}
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void
e100_netpoll(struct net_device* netdev)
{
e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev);
}
#endif
static int __init
e100_boot_setup(char* str)
{
struct sockaddr sa = {0};
int i;
/* Parse the colon separated Ethernet station address */
for (i = 0; i < ETH_ALEN; i++) {
unsigned int tmp;
if (sscanf(str + 3*i, "%2x", &tmp) != 1) {
printk(KERN_WARNING "Malformed station address");
return 0;
}
sa.sa_data[i] = (char)tmp;
}
default_mac = sa;
return 1;
}
__setup("etrax100_eth=", e100_boot_setup);
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