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path: root/drivers/net/tokenring/ibmtr_cs.c
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Diffstat (limited to 'drivers/net/tokenring/ibmtr_cs.c')
-rw-r--r--drivers/net/tokenring/ibmtr_cs.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/drivers/net/tokenring/ibmtr_cs.c b/drivers/net/tokenring/ibmtr_cs.c
new file mode 100644
index 000000000000..91b684630fc5
--- /dev/null
+++ b/drivers/net/tokenring/ibmtr_cs.c
@@ -0,0 +1,371 @@
+/*======================================================================
+
+ A PCMCIA token-ring driver for IBM-based cards
+
+ This driver supports the IBM PCMCIA Token-Ring Card.
+ Written by Steve Kipisz, kipisz@vnet.ibm.com or
+ bungy@ibm.net
+
+ Written 1995,1996.
+
+ This code is based on pcnet_cs.c from David Hinds.
+
+ V2.2.0 February 1999 - Mike Phillips phillim@amtrak.com
+
+ Linux V2.2.x presented significant changes to the underlying
+ ibmtr.c code. Mainly the code became a lot more organized and
+ modular.
+
+ This caused the old PCMCIA Token Ring driver to give up and go
+ home early. Instead of just patching the old code to make it
+ work, the PCMCIA code has been streamlined, updated and possibly
+ improved.
+
+ This code now only contains code required for the Card Services.
+ All we do here is set the card up enough so that the real ibmtr.c
+ driver can find it and work with it properly.
+
+ i.e. We set up the io port, irq, mmio memory and shared ram
+ memory. This enables ibmtr_probe in ibmtr.c to find the card and
+ configure it as though it was a normal ISA and/or PnP card.
+
+ CHANGES
+
+ v2.2.5 April 1999 Mike Phillips (phillim@amtrak.com)
+ Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
+
+ v2.2.7 May 1999 Mike Phillips (phillim@amtrak.com)
+ Updated to version 2.2.7 to match the first version of the kernel
+ that the modification to ibmtr.c were incorporated into.
+
+ v2.2.17 July 2000 Burt Silverman (burts@us.ibm.com)
+ Address translation feature of PCMCIA controller is usable so
+ memory windows can be placed in High memory (meaning above
+ 0xFFFFF.)
+
+======================================================================*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/trdevice.h>
+#include <linux/ibmtr.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#define PCMCIA
+#include "ibmtr.c"
+
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+/* MMIO base address */
+static u_long mmiobase = 0xce000;
+
+/* SRAM base address */
+static u_long srambase = 0xd0000;
+
+/* SRAM size 8,16,32,64 */
+static u_long sramsize = 64;
+
+/* Ringspeed 4,16 */
+static int ringspeed = 16;
+
+module_param(mmiobase, ulong, 0);
+module_param(srambase, ulong, 0);
+module_param(sramsize, ulong, 0);
+module_param(ringspeed, int, 0);
+MODULE_LICENSE("GPL");
+
+/*====================================================================*/
+
+static int ibmtr_config(struct pcmcia_device *link);
+static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
+static void ibmtr_release(struct pcmcia_device *link);
+static void ibmtr_detach(struct pcmcia_device *p_dev);
+
+/*====================================================================*/
+
+typedef struct ibmtr_dev_t {
+ struct pcmcia_device *p_dev;
+ struct net_device *dev;
+ struct tok_info *ti;
+} ibmtr_dev_t;
+
+static irqreturn_t ibmtr_interrupt(int irq, void *dev_id) {
+ ibmtr_dev_t *info = dev_id;
+ struct net_device *dev = info->dev;
+ return tok_interrupt(irq, dev);
+};
+
+static int __devinit ibmtr_attach(struct pcmcia_device *link)
+{
+ ibmtr_dev_t *info;
+ struct net_device *dev;
+
+ dev_dbg(&link->dev, "ibmtr_attach()\n");
+
+ /* Create new token-ring device */
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) return -ENOMEM;
+ dev = alloc_trdev(sizeof(struct tok_info));
+ if (!dev) {
+ kfree(info);
+ return -ENOMEM;
+ }
+
+ info->p_dev = link;
+ link->priv = info;
+ info->ti = netdev_priv(dev);
+
+ link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+ link->resource[0]->end = 4;
+ link->config_flags |= CONF_ENABLE_IRQ;
+ link->config_regs = PRESENT_OPTION;
+
+ info->dev = dev;
+
+ return ibmtr_config(link);
+} /* ibmtr_attach */
+
+static void ibmtr_detach(struct pcmcia_device *link)
+{
+ struct ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+ struct tok_info *ti = netdev_priv(dev);
+
+ dev_dbg(&link->dev, "ibmtr_detach\n");
+
+ /*
+ * When the card removal interrupt hits tok_interrupt(),
+ * bail out early, so we don't crash the machine
+ */
+ ti->sram_phys |= 1;
+
+ unregister_netdev(dev);
+
+ del_timer_sync(&(ti->tr_timer));
+
+ ibmtr_release(link);
+
+ free_netdev(dev);
+ kfree(info);
+} /* ibmtr_detach */
+
+static int __devinit ibmtr_config(struct pcmcia_device *link)
+{
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+ struct tok_info *ti = netdev_priv(dev);
+ int i, ret;
+
+ dev_dbg(&link->dev, "ibmtr_config\n");
+
+ link->io_lines = 16;
+ link->config_index = 0x61;
+
+ /* Determine if this is PRIMARY or ALTERNATE. */
+
+ /* Try PRIMARY card at 0xA20-0xA23 */
+ link->resource[0]->start = 0xA20;
+ i = pcmcia_request_io(link);
+ if (i != 0) {
+ /* Couldn't get 0xA20-0xA23. Try ALTERNATE at 0xA24-0xA27. */
+ link->resource[0]->start = 0xA24;
+ ret = pcmcia_request_io(link);
+ if (ret)
+ goto failed;
+ }
+ dev->base_addr = link->resource[0]->start;
+
+ ret = pcmcia_request_exclusive_irq(link, ibmtr_interrupt);
+ if (ret)
+ goto failed;
+ dev->irq = link->irq;
+ ti->irq = link->irq;
+ ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
+
+ /* Allocate the MMIO memory window */
+ link->resource[2]->flags |= WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
+ link->resource[2]->flags |= WIN_USE_WAIT;
+ link->resource[2]->start = 0;
+ link->resource[2]->end = 0x2000;
+ ret = pcmcia_request_window(link, link->resource[2], 250);
+ if (ret)
+ goto failed;
+
+ ret = pcmcia_map_mem_page(link, link->resource[2], mmiobase);
+ if (ret)
+ goto failed;
+ ti->mmio = ioremap(link->resource[2]->start,
+ resource_size(link->resource[2]));
+
+ /* Allocate the SRAM memory window */
+ link->resource[3]->flags = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
+ link->resource[3]->flags |= WIN_USE_WAIT;
+ link->resource[3]->start = 0;
+ link->resource[3]->end = sramsize * 1024;
+ ret = pcmcia_request_window(link, link->resource[3], 250);
+ if (ret)
+ goto failed;
+
+ ret = pcmcia_map_mem_page(link, link->resource[3], srambase);
+ if (ret)
+ goto failed;
+
+ ti->sram_base = srambase >> 12;
+ ti->sram_virt = ioremap(link->resource[3]->start,
+ resource_size(link->resource[3]));
+ ti->sram_phys = link->resource[3]->start;
+
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
+
+ /* Set up the Token-Ring Controller Configuration Register and
+ turn on the card. Check the "Local Area Network Credit Card
+ Adapters Technical Reference" SC30-3585 for this info. */
+ ibmtr_hw_setup(dev, mmiobase);
+
+ SET_NETDEV_DEV(dev, &link->dev);
+
+ i = ibmtr_probe_card(dev);
+ if (i != 0) {
+ pr_notice("register_netdev() failed\n");
+ goto failed;
+ }
+
+ netdev_info(dev, "port %#3lx, irq %d, mmio %#5lx, sram %#5lx, hwaddr=%pM\n",
+ dev->base_addr, dev->irq,
+ (u_long)ti->mmio, (u_long)(ti->sram_base << 12),
+ dev->dev_addr);
+ return 0;
+
+failed:
+ ibmtr_release(link);
+ return -ENODEV;
+} /* ibmtr_config */
+
+static void ibmtr_release(struct pcmcia_device *link)
+{
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ dev_dbg(&link->dev, "ibmtr_release\n");
+
+ if (link->resource[2]->end) {
+ struct tok_info *ti = netdev_priv(dev);
+ iounmap(ti->mmio);
+ }
+ pcmcia_disable_device(link);
+}
+
+static int ibmtr_suspend(struct pcmcia_device *link)
+{
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ if (link->open)
+ netif_device_detach(dev);
+
+ return 0;
+}
+
+static int __devinit ibmtr_resume(struct pcmcia_device *link)
+{
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ if (link->open) {
+ ibmtr_probe(dev); /* really? */
+ netif_device_attach(dev);
+ }
+
+ return 0;
+}
+
+
+/*====================================================================*/
+
+static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
+{
+ int i;
+
+ /* Bizarre IBM behavior, there are 16 bits of information we
+ need to set, but the card only allows us to send 4 bits at a
+ time. For each byte sent to base_addr, bits 7-4 tell the
+ card which part of the 16 bits we are setting, bits 3-0 contain
+ the actual information */
+
+ /* First nibble provides 4 bits of mmio */
+ i = (mmiobase >> 16) & 0x0F;
+ outb(i, dev->base_addr);
+
+ /* Second nibble provides 3 bits of mmio */
+ i = 0x10 | ((mmiobase >> 12) & 0x0E);
+ outb(i, dev->base_addr);
+
+ /* Third nibble, hard-coded values */
+ i = 0x26;
+ outb(i, dev->base_addr);
+
+ /* Fourth nibble sets shared ram page size */
+
+ /* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
+ i = (sramsize >> 4) & 0x07;
+ i = ((i == 4) ? 3 : i) << 2;
+ i |= 0x30;
+
+ if (ringspeed == 16)
+ i |= 2;
+ if (dev->base_addr == 0xA24)
+ i |= 1;
+ outb(i, dev->base_addr);
+
+ /* 0x40 will release the card for use */
+ outb(0x40, dev->base_addr);
+}
+
+static const struct pcmcia_device_id ibmtr_ids[] = {
+ PCMCIA_DEVICE_PROD_ID12("3Com", "TokenLink Velocity PC Card", 0x41240e5b, 0x82c3734e),
+ PCMCIA_DEVICE_PROD_ID12("IBM", "TOKEN RING", 0xb569a6e5, 0xbf8eed47),
+ PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, ibmtr_ids);
+
+static struct pcmcia_driver ibmtr_cs_driver = {
+ .owner = THIS_MODULE,
+ .name = "ibmtr_cs",
+ .probe = ibmtr_attach,
+ .remove = ibmtr_detach,
+ .id_table = ibmtr_ids,
+ .suspend = ibmtr_suspend,
+ .resume = ibmtr_resume,
+};
+
+static int __init init_ibmtr_cs(void)
+{
+ return pcmcia_register_driver(&ibmtr_cs_driver);
+}
+
+static void __exit exit_ibmtr_cs(void)
+{
+ pcmcia_unregister_driver(&ibmtr_cs_driver);
+}
+
+module_init(init_ibmtr_cs);
+module_exit(exit_ibmtr_cs);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 03:20:47 +0000