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path: root/drivers/net/atari_pamsnet.c
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Diffstat (limited to 'drivers/net/atari_pamsnet.c')
-rw-r--r--drivers/net/atari_pamsnet.c878
1 files changed, 0 insertions, 878 deletions
diff --git a/drivers/net/atari_pamsnet.c b/drivers/net/atari_pamsnet.c
deleted file mode 100644
index f7356374a2e..00000000000
--- a/drivers/net/atari_pamsnet.c
+++ /dev/null
@@ -1,878 +0,0 @@
-/* atari_pamsnet.c PAMsNet device driver for linux68k.
- *
- * Version: @(#)PAMsNet.c 0.2 03/31/96
- *
- * Author: Torsten Lang <Torsten.Lang@ap.physik.uni-giessen.de>
- * <Torsten.Lang@jung.de>
- *
- * This driver is based on my driver PAMSDMA.c for MiNT-Net and
- * on the driver bionet.c written by
- * Hartmut Laue <laue@ifk-mp.uni-kiel.de>
- * and Torsten Narjes <narjes@ifk-mp.uni-kiel.de>
- *
- * Little adaptions for integration into pl7 by Roman Hodek
- *
- What is it ?
- ------------
- This driver controls the PAMsNet LAN-Adapter which connects
- an ATARI ST/TT via the ACSI-port to an Ethernet-based network.
-
- This version can be compiled as a loadable module (See the
- compile command at the bottom of this file).
- At load time, you can optionally set the debugging level and the
- fastest response time on the command line of 'insmod'.
-
- 'pamsnet_debug'
- controls the amount of diagnostic messages:
- 0 : no messages
- >0 : see code for meaning of printed messages
-
- 'pamsnet_min_poll_time' (always >=1)
- gives the time (in jiffies) between polls. Low values
- increase the system load (beware!)
-
- When loaded, a net device with the name 'eth?' becomes available,
- which can be controlled with the usual 'ifconfig' command.
-
- It is possible to compile this driver into the kernel like other
- (net) drivers. For this purpose, some source files (e.g. config-files
- makefiles, Space.c) must be changed accordingly. (You may refer to
- other drivers how to do it.) In this case, the device will be detected
- at boot time and (probably) appear as 'eth0'.
-
- Theory of Operation
- -------------------
- Because the ATARI DMA port is usually shared between several
- devices (eg. harddisk, floppy) we cannot block the ACSI bus
- while waiting for interrupts. Therefore we use a polling mechanism
- to fetch packets from the adapter. For the same reason, we send
- packets without checking that the previous packet has been sent to
- the LAN. We rely on the higher levels of the networking code to detect
- missing packets and resend them.
-
- Before we access the ATARI DMA controller, we check if another
- process is using the DMA. If not, we lock the DMA, perform one or
- more packet transfers and unlock the DMA before returning.
- We do not use 'stdma_lock' unconditionally because it is unclear
- if the networking code can be set to sleep, which will happen if
- another (possibly slow) device is using the DMA controller.
-
- The polling is done via timer interrupts which periodically
- 'simulate' an interrupt from the Ethernet adapter. The time (in jiffies)
- between polls varies depending on an estimate of the net activity.
- The allowed range is given by the variable 'bionet_min_poll_time'
- for the lower (fastest) limit and the constant 'MAX_POLL_TIME'
- for the higher (slowest) limit.
-
- Whenever a packet arrives, we switch to fastest response by setting
- the polling time to its lowest limit. If the following poll fails,
- because no packets have arrived, we increase the time for the next
- poll. When the net activity is low, the polling time effectively
- stays at its maximum value, resulting in the lowest load for the
- machine.
- */
-
-#define MAX_POLL_TIME 10
-
-static char *version =
- "pamsnet.c:v0.2beta 30-mar-96 (c) Torsten Lang.\n";
-
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/bitops.h>
-#include <asm/system.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <linux/errno.h>
-#include <asm/atarihw.h>
-#include <asm/atariints.h>
-#include <asm/atari_stdma.h>
-#include <asm/atari_acsi.h>
-
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-
-#undef READ
-#undef WRITE
-
-/* use 0 for production, 1 for verification, >2 for debug
- */
-#ifndef NET_DEBUG
-#define NET_DEBUG 0
-#endif
-/*
- * Global variable 'pamsnet_debug'. Can be set at load time by 'insmod'
- */
-unsigned int pamsnet_debug = NET_DEBUG;
-module_param(pamsnet_debug, int, 0);
-MODULE_PARM_DESC(pamsnet_debug, "pamsnet debug enable (0-1)");
-MODULE_LICENSE("GPL");
-
-static unsigned int pamsnet_min_poll_time = 2;
-
-
-/* Information that need to be kept for each board.
- */
-struct net_local {
- struct net_device_stats stats;
- long open_time; /* for debugging */
- int poll_time; /* polling time varies with net load */
-};
-
-static struct nic_pkt_s { /* packet format */
- unsigned char buffer[2048];
-} *nic_packet = 0;
-unsigned char *phys_nic_packet;
-
-typedef unsigned char HADDR[6]; /* 6-byte hardware address of lance */
-
-/* Index to functions, as function prototypes.
- */
-static void start (int target);
-static int stop (int target);
-static int testpkt (int target);
-static int sendpkt (int target, unsigned char *buffer, int length);
-static int receivepkt (int target, unsigned char *buffer);
-static int inquiry (int target, unsigned char *buffer);
-static HADDR *read_hw_addr(int target, unsigned char *buffer);
-static void setup_dma (void *address, unsigned rw_flag, int num_blocks);
-static int send_first (int target, unsigned char byte);
-static int send_1_5 (int lun, unsigned char *command, int dma);
-static int get_status (void);
-static int calc_received (void *start_address);
-
-static int pamsnet_open(struct net_device *dev);
-static int pamsnet_send_packet(struct sk_buff *skb, struct net_device *dev);
-static void pamsnet_poll_rx(struct net_device *);
-static int pamsnet_close(struct net_device *dev);
-static struct net_device_stats *net_get_stats(struct net_device *dev);
-static void pamsnet_tick(unsigned long);
-
-static irqreturn_t pamsnet_intr(int irq, void *data);
-
-static DEFINE_TIMER(pamsnet_timer, pamsnet_tick, 0, 0);
-
-#define STRAM_ADDR(a) (((a) & 0xff000000) == 0)
-
-typedef struct
-{
- unsigned char reserved1[0x38];
- HADDR hwaddr;
- unsigned char reserved2[0x1c2];
-} DMAHWADDR;
-
-/*
- * Definitions of commands understood by the PAMs DMA adaptor.
- *
- * In general the DMA adaptor uses LUN 0, 5, 6 and 7 on one ID changeable
- * by the PAM's Net software.
- *
- * LUN 0 works as a harddisk. You can boot the PAM's Net driver there.
- * LUN 5 works as a harddisk and lets you access the RAM and some I/O HW
- * area. In sector 0, bytes 0x38-0x3d you find the ethernet HW address
- * of the adaptor.
- * LUN 6 works as a harddisk and lets you access the firmware ROM.
- * LUN 7 lets you send and receive packets.
- *
- * Some commands like the INQUIRY command work identical on all used LUNs.
- *
- * UNKNOWN1 seems to read some data.
- * Command length is 6 bytes.
- * UNKNOWN2 seems to read some data (command byte 1 must be !=0). The
- * following bytes seem to be something like an allocation length.
- * Command length is 6 bytes.
- * READPKT reads a packet received by the DMA adaptor.
- * Command length is 6 bytes.
- * WRITEPKT sends a packet transferred by the following DMA phase. The length
- * of the packet is transferred in command bytes 3 and 4.
- * The adaptor automatically replaces the src hw address in an ethernet
- * packet by its own hw address.
- * Command length is 6 bytes.
- * INQUIRY has the same function as the INQUIRY command supported by harddisks
- * and other SCSI devices. It lets you detect which device you found
- * at a given address.
- * Command length is 6 bytes.
- * START initializes the DMA adaptor. After this command it is able to send
- * and receive packets. There is no status byte returned!
- * Command length is 1 byte.
- * NUMPKTS gives back the number of received packets waiting in the queue in
- * the status byte.
- * Command length is 1 byte.
- * UNKNOWN3
- * UNKNOWN4 Function of these three commands is unknown.
- * UNKNOWN5 The command length of these three commands is 1 byte.
- * DESELECT immediately deselects the DMA adaptor. May important with interrupt
- * driven operation.
- * Command length is 1 byte.
- * STOP resets the DMA adaptor. After this command packets can no longer
- * be received or transferred.
- * Command length is 6 byte.
- */
-
-enum {UNKNOWN1=3, READPKT=8, UNKNOWN2, WRITEPKT=10, INQUIRY=18, START,
- NUMPKTS=22, UNKNOWN3, UNKNOWN4, UNKNOWN5, DESELECT, STOP};
-
-#define READSECTOR READPKT
-#define WRITESECTOR WRITEPKT
-
-u_char *inquire8="MV PAM's NET/GK";
-
-#define DMALOW dma_wd.dma_lo
-#define DMAMID dma_wd.dma_md
-#define DMAHIGH dma_wd.dma_hi
-#define DACCESS dma_wd.fdc_acces_seccount
-
-#define MFP_GPIP mfp.par_dt_reg
-
-/* Some useful functions */
-
-#define INT (!(MFP_GPIP & 0x20))
-#define DELAY ({MFP_GPIP; MFP_GPIP; MFP_GPIP;})
-#define WRITEMODE(value) \
- ({ u_short dummy = value; \
- __asm__ volatile("movew %0, 0xFFFF8606" : : "d"(dummy)); \
- DELAY; \
- })
-#define WRITEBOTH(value1, value2) \
- ({ u_long dummy = (u_long)(value1)<<16 | (u_short)(value2); \
- __asm__ volatile("movel %0, 0xFFFF8604" : : "d"(dummy)); \
- DELAY; \
- })
-
-/* Definitions for DMODE */
-
-#define READ 0x000
-#define WRITE 0x100
-
-#define DMA_FDC 0x080
-#define DMA_ACSI 0x000
-
-#define DMA_DISABLE 0x040
-
-#define SEC_COUNT 0x010
-#define DMA_WINDOW 0x000
-
-#define REG_ACSI 0x008
-#define REG_FDC 0x000
-
-#define A1 0x002
-
-/* Timeout constants */
-
-#define TIMEOUTCMD HZ/2 /* ca. 500ms */
-#define TIMEOUTDMA HZ /* ca. 1s */
-#define COMMAND_DELAY 500 /* ca. 0.5ms */
-
-unsigned rw;
-int lance_target = -1;
-int if_up = 0;
-
-/* The following routines access the ethernet board connected to the
- * ACSI port via the st_dma chip.
- */
-
-/* The following lowlevel routines work on physical addresses only and assume
- * that eventually needed buffers are
- * - completely located in ST RAM
- * - are contigous in the physical address space
- */
-
-/* Setup the DMA counter */
-
-static void
-setup_dma (void *address, unsigned rw_flag, int num_blocks)
-{
- WRITEMODE((unsigned) rw_flag | DMA_FDC | SEC_COUNT | REG_ACSI |
- A1);
- WRITEMODE((unsigned)(rw_flag ^ WRITE) | DMA_FDC | SEC_COUNT | REG_ACSI |
- A1);
- WRITEMODE((unsigned) rw_flag | DMA_FDC | SEC_COUNT | REG_ACSI |
- A1);
- DMALOW = (unsigned char)((unsigned long)address & 0xFF);
- DMAMID = (unsigned char)(((unsigned long)address >> 8) & 0xFF);
- DMAHIGH = (unsigned char)(((unsigned long)address >> 16) & 0xFF);
- WRITEBOTH((unsigned)num_blocks & 0xFF,
- rw_flag | DMA_FDC | DMA_WINDOW | REG_ACSI | A1);
- rw = rw_flag;
-}
-
-/* Send the first byte of an command block */
-
-static int
-send_first (int target, unsigned char byte)
-{
- rw = READ;
- acsi_delay_end(COMMAND_DELAY);
- /*
- * wake up ACSI
- */
- WRITEMODE(DMA_FDC | DMA_WINDOW | REG_ACSI);
- /*
- * write command byte
- */
- WRITEBOTH((target << 5) | (byte & 0x1F), DMA_FDC |
- DMA_WINDOW | REG_ACSI | A1);
- return (!acsi_wait_for_IRQ(TIMEOUTCMD));
-}
-
-/* Send the rest of an command block */
-
-static int
-send_1_5 (int lun, unsigned char *command, int dma)
-{
- int i, j;
-
- for (i=0; i<5; i++) {
- WRITEBOTH((!i ? (((lun & 0x7) << 5) | (command[i] & 0x1F))
- : command[i]),
- rw | REG_ACSI | DMA_WINDOW |
- ((i < 4) ? DMA_FDC
- : (dma ? DMA_ACSI
- : DMA_FDC)) | A1);
- if (i < 4 && (j = !acsi_wait_for_IRQ(TIMEOUTCMD)))
- return (j);
- }
- return (0);
-}
-
-/* Read a status byte */
-
-static int
-get_status (void)
-{
- WRITEMODE(DMA_FDC | DMA_WINDOW | REG_ACSI | A1);
- acsi_delay_start();
- return ((int)(DACCESS & 0xFF));
-}
-
-/* Calculate the number of received bytes */
-
-static int
-calc_received (void *start_address)
-{
- return (int)(
- (((unsigned long)DMAHIGH << 16) | ((unsigned)DMAMID << 8) | DMALOW)
- - (unsigned long)start_address);
-}
-
-/* The following midlevel routines still work on physical addresses ... */
-
-/* start() starts the PAM's DMA adaptor */
-
-static void
-start (int target)
-{
- send_first(target, START);
-}
-
-/* stop() stops the PAM's DMA adaptor and returns a value of zero in case of success */
-
-static int
-stop (int target)
-{
- int ret = -1;
- unsigned char cmd_buffer[5];
-
- if (send_first(target, STOP))
- goto bad;
- cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] =
- cmd_buffer[3] = cmd_buffer[4] = 0;
- if (send_1_5(7, cmd_buffer, 0) ||
- !acsi_wait_for_IRQ(TIMEOUTDMA) ||
- get_status())
- goto bad;
- ret = 0;
-bad:
- return (ret);
-}
-
-/* testpkt() returns the number of received packets waiting in the queue */
-
-static int
-testpkt(int target)
-{
- int ret = -1;
-
- if (send_first(target, NUMPKTS))
- goto bad;
- ret = get_status();
-bad:
- return (ret);
-}
-
-/* inquiry() returns 0 when PAM's DMA found, -1 when timeout, -2 otherwise */
-/* Please note: The buffer is for internal use only but must be defined! */
-
-static int
-inquiry (int target, unsigned char *buffer)
-{
- int ret = -1;
- unsigned char *vbuffer = phys_to_virt((unsigned long)buffer);
- unsigned char cmd_buffer[5];
-
- if (send_first(target, INQUIRY))
- goto bad;
- setup_dma(buffer, READ, 1);
- vbuffer[8] = vbuffer[27] = 0; /* Avoid confusion with previous read data */
- cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0;
- cmd_buffer[3] = 48;
- if (send_1_5(5, cmd_buffer, 1) ||
- !acsi_wait_for_IRQ(TIMEOUTDMA) ||
- get_status() ||
- (calc_received(buffer) < 32))
- goto bad;
- dma_cache_maintenance((unsigned long)(buffer+8), 20, 0);
- if (memcmp(inquire8, vbuffer+8, 20))
- goto bad;
- ret = 0;
-bad:
- if (!!NET_DEBUG) {
- vbuffer[8+20]=0;
- printk("inquiry of target %d: %s\n", target, vbuffer+8);
- }
- return (ret);
-}
-
-/*
- * read_hw_addr() reads the sector containing the hwaddr and returns
- * a pointer to it (virtual address!) or 0 in case of an error
- */
-
-static HADDR
-*read_hw_addr(int target, unsigned char *buffer)
-{
- HADDR *ret = 0;
- unsigned char cmd_buffer[5];
-
- if (send_first(target, READSECTOR))
- goto bad;
- setup_dma(buffer, READ, 1);
- cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0;
- cmd_buffer[3] = 1;
- if (send_1_5(5, cmd_buffer, 1) ||
- !acsi_wait_for_IRQ(TIMEOUTDMA) ||
- get_status())
- goto bad;
- ret = phys_to_virt((unsigned long)&(((DMAHWADDR *)buffer)->hwaddr));
- dma_cache_maintenance((unsigned long)buffer, 512, 0);
-bad:
- return (ret);
-}
-
-static irqreturn_t
-pamsnet_intr(int irq, void *data)
-{
- return IRQ_HANDLED;
-}
-
-/* receivepkt() loads a packet to a given buffer and returns its length */
-
-static int
-receivepkt (int target, unsigned char *buffer)
-{
- int ret = -1;
- unsigned char cmd_buffer[5];
-
- if (send_first(target, READPKT))
- goto bad;
- setup_dma(buffer, READ, 3);
- cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0;
- cmd_buffer[3] = 3;
- if (send_1_5(7, cmd_buffer, 1) ||
- !acsi_wait_for_IRQ(TIMEOUTDMA) ||
- get_status())
- goto bad;
- ret = calc_received(buffer);
-bad:
- return (ret);
-}
-
-/* sendpkt() sends a packet and returns a value of zero when the packet was sent
- successfully */
-
-static int
-sendpkt (int target, unsigned char *buffer, int length)
-{
- int ret = -1;
- unsigned char cmd_buffer[5];
-
- if (send_first(target, WRITEPKT))
- goto bad;
- setup_dma(buffer, WRITE, 3);
- cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[4] = 0;
- cmd_buffer[2] = length >> 8;
- cmd_buffer[3] = length & 0xFF;
- if (send_1_5(7, cmd_buffer, 1) ||
- !acsi_wait_for_IRQ(TIMEOUTDMA) ||
- get_status())
- goto bad;
- ret = 0;
-bad:
- return (ret);
-}
-
-/* The following higher level routines work on virtual addresses and convert them to
- * physical addresses when passed to the lowlevel routines. It's up to the higher level
- * routines to copy data from Alternate RAM to ST RAM if neccesary!
- */
-
-/* Check for a network adaptor of this type, and return '0' if one exists.
- */
-
-struct net_device * __init pamsnet_probe (int unit)
-{
- struct net_device *dev;
- int i;
- HADDR *hwaddr;
- int err;
-
- unsigned char station_addr[6];
- static unsigned version_printed;
- /* avoid "Probing for..." printed 4 times - the driver is supporting only one adapter now! */
- static int no_more_found;
-
- if (no_more_found)
- return ERR_PTR(-ENODEV);
- no_more_found = 1;
-
- dev = alloc_etherdev(sizeof(struct net_local));
- if (!dev)
- return ERR_PTR(-ENOMEM);
- if (unit >= 0) {
- sprintf(dev->name, "eth%d", unit);
- netdev_boot_setup_check(dev);
- }
- SET_MODULE_OWNER(dev);
-
- printk("Probing for PAM's Net/GK Adapter...\n");
-
- /* Allocate the DMA buffer here since we need it for probing! */
-
- nic_packet = (struct nic_pkt_s *)acsi_buffer;
- phys_nic_packet = (unsigned char *)phys_acsi_buffer;
- if (pamsnet_debug > 0) {
- printk("nic_packet at 0x%p, phys at 0x%p\n",
- nic_packet, phys_nic_packet );
- }
-
- stdma_lock(pamsnet_intr, NULL);
- DISABLE_IRQ();
-
- for (i=0; i<8; i++) {
- /* Do two inquiries to cover cases with strange equipment on previous ID */
- /* blocking the ACSI bus (like the SLMC804 laser printer controller... */
- inquiry(i, phys_nic_packet);
- if (!inquiry(i, phys_nic_packet)) {
- lance_target = i;
- break;
- }
- }
-
- if (!!NET_DEBUG)
- printk("ID: %d\n",i);
-
- if (lance_target >= 0) {
- if (!(hwaddr = read_hw_addr(lance_target, phys_nic_packet)))
- lance_target = -1;
- else
- memcpy (station_addr, hwaddr, ETH_ALEN);
- }
-
- ENABLE_IRQ();
- stdma_release();
-
- if (lance_target < 0) {
- printk("No PAM's Net/GK found.\n");
- free_netdev(dev);
- return ERR_PTR(-ENODEV);
- }
-
- if (pamsnet_debug > 0 && version_printed++ == 0)
- printk(version);
-
- printk("%s: %s found on target %01d, eth-addr: %02x:%02x:%02x:%02x:%02x:%02x.\n",
- dev->name, "PAM's Net/GK", lance_target,
- station_addr[0], station_addr[1], station_addr[2],
- station_addr[3], station_addr[4], station_addr[5]);
-
- /* Initialize the device structure. */
- dev->open = pamsnet_open;
- dev->stop = pamsnet_close;
- dev->hard_start_xmit = pamsnet_send_packet;
- dev->get_stats = net_get_stats;
-
- /* Fill in the fields of the device structure with ethernet-generic
- * values. This should be in a common file instead of per-driver.
- */
-
- for (i = 0; i < ETH_ALEN; i++) {
-#if 0
- dev->broadcast[i] = 0xff;
-#endif
- dev->dev_addr[i] = station_addr[i];
- }
- err = register_netdev(dev);
- if (!err)
- return dev;
-
- free_netdev(dev);
- return ERR_PTR(err);
-}
-
-/* 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
-pamsnet_open(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
-
- if (pamsnet_debug > 0)
- printk("pamsnet_open\n");
- stdma_lock(pamsnet_intr, NULL);
- DISABLE_IRQ();
-
- /* Reset the hardware here.
- */
- if (!if_up)
- start(lance_target);
- if_up = 1;
- lp->open_time = 0; /*jiffies*/
- lp->poll_time = MAX_POLL_TIME;
-
- dev->tbusy = 0;
- dev->interrupt = 0;
- dev->start = 1;
-
- ENABLE_IRQ();
- stdma_release();
- pamsnet_timer.data = (long)dev;
- pamsnet_timer.expires = jiffies + lp->poll_time;
- add_timer(&pamsnet_timer);
- return 0;
-}
-
-static int
-pamsnet_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- unsigned long flags;
-
- /* Block a timer-based transmit from overlapping. This could better be
- * done with atomic_swap(1, dev->tbusy), but set_bit() works as well.
- */
- local_irq_save(flags);
-
- if (stdma_islocked()) {
- local_irq_restore(flags);
- lp->stats.tx_errors++;
- }
- else {
- int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
- unsigned long buf = virt_to_phys(skb->data);
- int stat;
-
- stdma_lock(pamsnet_intr, NULL);
- DISABLE_IRQ();
-
- local_irq_restore(flags);
- if( !STRAM_ADDR(buf+length-1) ) {
- skb_copy_from_linear_data(skb, nic_packet->buffer,
- length);
- buf = (unsigned long)phys_nic_packet;
- }
-
- dma_cache_maintenance(buf, length, 1);
-
- stat = sendpkt(lance_target, (unsigned char *)buf, length);
- ENABLE_IRQ();
- stdma_release();
-
- dev->trans_start = jiffies;
- dev->tbusy = 0;
- lp->stats.tx_packets++;
- lp->stats.tx_bytes+=length;
- }
- dev_kfree_skb(skb);
-
- return 0;
-}
-
-/* We have a good packet(s), get it/them out of the buffers.
- */
-static void
-pamsnet_poll_rx(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- int boguscount;
- int pkt_len;
- struct sk_buff *skb;
- unsigned long flags;
-
- local_irq_save(flags);
- /* ++roman: Take care at locking the ST-DMA... This must be done with ints
- * off, since otherwise an int could slip in between the question and the
- * locking itself, and then we'd go to sleep... And locking itself is
- * necessary to keep the floppy_change timer from working with ST-DMA
- * registers. */
- if (stdma_islocked()) {
- local_irq_restore(flags);
- return;
- }
- stdma_lock(pamsnet_intr, NULL);
- DISABLE_IRQ();
- local_irq_restore(flags);
-
- boguscount = testpkt(lance_target);
- if( lp->poll_time < MAX_POLL_TIME ) lp->poll_time++;
-
- while(boguscount--) {
- pkt_len = receivepkt(lance_target, phys_nic_packet);
-
- if( pkt_len < 60 ) break;
-
- /* Good packet... */
-
- dma_cache_maintenance((unsigned long)phys_nic_packet, pkt_len, 0);
-
- lp->poll_time = pamsnet_min_poll_time; /* fast poll */
- if( pkt_len >= 60 && pkt_len <= 2048 ) {
- if (pkt_len > 1514)
- pkt_len = 1514;
-
- /* Malloc up new buffer.
- */
- skb = alloc_skb(pkt_len, GFP_ATOMIC);
- if (skb == NULL) {
- printk("%s: Memory squeeze, dropping packet.\n",
- dev->name);
- lp->stats.rx_dropped++;
- break;
- }
- skb->len = pkt_len;
- skb->dev = dev;
-
- /* 'skb->data' points to the start of sk_buff data area.
- */
- skb_copy_to_linear_data(skb, nic_packet->buffer,
- pkt_len);
- netif_rx(skb);
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- lp->stats.rx_bytes+=pkt_len;
- }
- }
-
- /* If any worth-while packets have been received, dev_rint()
- has done a mark_bh(INET_BH) for us and will work on them
- when we get to the bottom-half routine.
- */
-
- ENABLE_IRQ();
- stdma_release();
- return;
-}
-
-/* pamsnet_tick: called by pamsnet_timer. Reads packets from the adapter,
- * passes them to the higher layers and restarts the timer.
- */
-static void
-pamsnet_tick(unsigned long data)
-{
- struct net_device *dev = (struct net_device *)data;
- struct net_local *lp = netdev_priv(dev);
-
- if( pamsnet_debug > 0 && (lp->open_time++ & 7) == 8 )
- printk("pamsnet_tick: %ld\n", lp->open_time);
-
- pamsnet_poll_rx(dev);
-
- pamsnet_timer.expires = jiffies + lp->poll_time;
- add_timer(&pamsnet_timer);
-}
-
-/* The inverse routine to pamsnet_open().
- */
-static int
-pamsnet_close(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
-
- if (pamsnet_debug > 0)
- printk("pamsnet_close, open_time=%ld\n", lp->open_time);
- del_timer(&pamsnet_timer);
- stdma_lock(pamsnet_intr, NULL);
- DISABLE_IRQ();
-
- if (if_up)
- stop(lance_target);
- if_up = 0;
-
- lp->open_time = 0;
-
- dev->tbusy = 1;
- dev->start = 0;
-
- ENABLE_IRQ();
- stdma_release();
- return 0;
-}
-
-/* Get the current statistics.
- This may be called with the card open or closed.
- */
-static struct net_device_stats *net_get_stats(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- return &lp->stats;
-}
-
-
-#ifdef MODULE
-
-static struct net_device *pam_dev;
-
-int init_module(void)
-{
- pam_dev = pamsnet_probe(-1);
- if (IS_ERR(pam_dev))
- return PTR_ERR(pam_dev);
- return 0;
-}
-
-void cleanup_module(void)
-{
- unregister_netdev(pam_dev);
- free_netdev(pam_dev);
-}
-
-#endif /* MODULE */
-
-/* Local variables:
- * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/include
- -b m68k-linuxaout -Wall -Wstrict-prototypes -O2
- -fomit-frame-pointer -pipe -DMODULE -I../../net/inet -c atari_pamsnet.c"
- * version-control: t
- * kept-new-versions: 5
- * tab-width: 8
- * End:
- */