drivers/net/pcmcia/ibmtr_cs.c - maze/linux - Git at Google

 /*======================================================================

     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 "../tokenring/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);
	/*======================================================================

	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 "../tokenring/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);