diff options
Diffstat (limited to 'drivers/net/wireless/orinoco_plx.c')
| -rw-r--r-- | drivers/net/wireless/orinoco_plx.c | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/drivers/net/wireless/orinoco_plx.c b/drivers/net/wireless/orinoco_plx.c new file mode 100644 index 0000000..7ab05b8 --- /dev/null +++ b/drivers/net/wireless/orinoco_plx.c @@ -0,0 +1,419 @@ +/* orinoco_plx.c + * + * Driver for Prism II devices which would usually be driven by orinoco_cs, + * but are connected to the PCI bus by a PLX9052. + * + * Current maintainers (as of 29 September 2003) are: + * Pavel Roskin <proski AT gnu.org> + * and David Gibson <hermes AT gibson.dropbear.id.au> + * + * (C) Copyright David Gibson, IBM Corp. 2001-2003. + * Copyright (C) 2001 Daniel Barlow + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License + * at http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and + * limitations under the License. + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU General Public License version 2 (the "GPL"), in + * which case the provisions of the GPL are applicable instead of the + * above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the MPL, indicate your decision by + * deleting the provisions above and replace them with the notice and + * other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file + * under either the MPL or the GPL. + + * Caution: this is experimental and probably buggy. For success and + * failure reports for different cards and adaptors, see + * orinoco_plx_pci_id_table near the end of the file. If you have a + * card we don't have the PCI id for, and looks like it should work, + * drop me mail with the id and "it works"/"it doesn't work". + * + * Note: if everything gets detected fine but it doesn't actually send + * or receive packets, your first port of call should probably be to + * try newer firmware in the card. Especially if you're doing Ad-Hoc + * modes. + * + * The actual driving is done by orinoco.c, this is just resource + * allocation stuff. The explanation below is courtesy of Ryan Niemi + * on the linux-wlan-ng list at + * http://archives.neohapsis.com/archives/dev/linux-wlan/2001-q1/0026.html + * + * The PLX9052-based cards (WL11000 and several others) are a + * different beast than the usual PCMCIA-based PRISM2 configuration + * expected by wlan-ng. Here's the general details on how the WL11000 + * PCI adapter works: + * + * - Two PCI I/O address spaces, one 0x80 long which contains the + * PLX9052 registers, and one that's 0x40 long mapped to the PCMCIA + * slot I/O address space. + * + * - One PCI memory address space, mapped to the PCMCIA memory space + * (containing the CIS). + * + * After identifying the I/O and memory space, you can read through + * the memory space to confirm the CIS's device ID or manufacturer ID + * to make sure it's the expected card. qKeep in mind that the PCMCIA + * spec specifies the CIS as the lower 8 bits of each word read from + * the CIS, so to read the bytes of the CIS, read every other byte + * (0,2,4,...). Passing that test, you need to enable the I/O address + * space on the PCMCIA card via the PCMCIA COR register. This is the + * first byte following the CIS. In my case (which may not have any + * relation to what's on the PRISM2 cards), COR was at offset 0x800 + * within the PCI memory space. Write 0x41 to the COR register to + * enable I/O mode and to select level triggered interrupts. To + * confirm you actually succeeded, read the COR register back and make + * sure it actually got set to 0x41, incase you have an unexpected + * card inserted. + * + * Following that, you can treat the second PCI I/O address space (the + * one that's not 0x80 in length) as the PCMCIA I/O space. + * + * Note that in the Eumitcom's source for their drivers, they register + * the interrupt as edge triggered when registering it with the + * Windows kernel. I don't recall how to register edge triggered on + * Linux (if it can be done at all). But in some experimentation, I + * don't see much operational difference between using either + * interrupt mode. Don't mess with the interrupt mode in the COR + * register though, as the PLX9052 wants level triggers with the way + * the serial EEPROM configures it on the WL11000. + * + * There's some other little quirks related to timing that I bumped + * into, but I don't recall right now. Also, there's two variants of + * the WL11000 I've seen, revision A1 and T2. These seem to differ + * slightly in the timings configured in the wait-state generator in + * the PLX9052. There have also been some comments from Eumitcom that + * cards shouldn't be hot swapped, apparently due to risk of cooking + * the PLX9052. I'm unsure why they believe this, as I can't see + * anything in the design that would really cause a problem, except + * for crashing drivers not written to expect it. And having developed + * drivers for the WL11000, I'd say it's quite tricky to write code + * that will successfully deal with a hot unplug. Very odd things + * happen on the I/O side of things. But anyway, be warned. Despite + * that, I've hot-swapped a number of times during debugging and + * driver development for various reasons (stuck WAIT# line after the + * radio card's firmware locks up). + * + * Hope this is enough info for someone to add PLX9052 support to the + * wlan-ng card. In the case of the WL11000, the PCI ID's are + * 0x1639/0x0200, with matching subsystem ID's. Other PLX9052-based + * manufacturers other than Eumitcom (or on cards other than the + * WL11000) may have different PCI ID's. + * + * If anyone needs any more specific info, let me know. I haven't had + * time to implement support myself yet, and with the way things are + * going, might not have time for a while.. + */ + +#define DRIVER_NAME "orinoco_plx" +#define PFX DRIVER_NAME ": " + +#include <linux/config.h> + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/ioport.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/system.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <linux/etherdevice.h> +#include <linux/list.h> +#include <linux/pci.h> +#include <linux/fcntl.h> + +#include <pcmcia/cisreg.h> + +#include "hermes.h" +#include "orinoco.h" + +#define COR_OFFSET (0x3e0) /* COR attribute offset of Prism2 PC card */ +#define COR_VALUE (COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */ +#define COR_RESET (0x80) /* reset bit in the COR register */ +#define PLX_RESET_TIME (500) /* milliseconds */ + +#define PLX_INTCSR 0x4c /* Interrupt Control & Status Register */ +#define PLX_INTCSR_INTEN (1<<6) /* Interrupt Enable bit */ + +static const u8 cis_magic[] = { + 0x01, 0x03, 0x00, 0x00, 0xff, 0x17, 0x04, 0x67 +}; + +/* Orinoco PLX specific data */ +struct orinoco_plx_card { + void __iomem *attr_mem; +}; + +/* + * Do a soft reset of the card using the Configuration Option Register + */ +static int orinoco_plx_cor_reset(struct orinoco_private *priv) +{ + hermes_t *hw = &priv->hw; + struct orinoco_plx_card *card = priv->card; + u8 __iomem *attr_mem = card->attr_mem; + unsigned long timeout; + u16 reg; + + writeb(COR_VALUE | COR_RESET, attr_mem + COR_OFFSET); + mdelay(1); + + writeb(COR_VALUE, attr_mem + COR_OFFSET); + mdelay(1); + + /* Just in case, wait more until the card is no longer busy */ + timeout = jiffies + (PLX_RESET_TIME * HZ / 1000); + reg = hermes_read_regn(hw, CMD); + while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) { + mdelay(1); + reg = hermes_read_regn(hw, CMD); + } + + /* Did we timeout ? */ + if (reg & HERMES_CMD_BUSY) { + printk(KERN_ERR PFX "Busy timeout\n"); + return -ETIMEDOUT; + } + + return 0; +} + + +static int orinoco_plx_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int err = 0; + u8 __iomem *attr_mem = NULL; + u32 csr_reg, plx_addr; + struct orinoco_private *priv = NULL; + struct orinoco_plx_card *card; + unsigned long pccard_ioaddr = 0; + unsigned long pccard_iolen = 0; + struct net_device *dev = NULL; + void __iomem *mem; + int i; + + err = pci_enable_device(pdev); + if (err) { + printk(KERN_ERR PFX "Cannot enable PCI device\n"); + return err; + } + + err = pci_request_regions(pdev, DRIVER_NAME); + if (err != 0) { + printk(KERN_ERR PFX "Cannot obtain PCI resources\n"); + goto fail_resources; + } + + /* Resource 1 is mapped to PLX-specific registers */ + plx_addr = pci_resource_start(pdev, 1); + + /* Resource 2 is mapped to the PCMCIA attribute memory */ + attr_mem = ioremap(pci_resource_start(pdev, 2), + pci_resource_len(pdev, 2)); + if (!attr_mem) { + printk(KERN_ERR PFX "Cannot remap PCMCIA space\n"); + goto fail_map_attr; + } + + /* Resource 3 is mapped to the PCMCIA I/O address space */ + pccard_ioaddr = pci_resource_start(pdev, 3); + pccard_iolen = pci_resource_len(pdev, 3); + + mem = pci_iomap(pdev, 3, 0); + if (!mem) { + err = -ENOMEM; + goto fail_map_io; + } + + /* Allocate network device */ + dev = alloc_orinocodev(sizeof(*card), orinoco_plx_cor_reset); + if (!dev) { + printk(KERN_ERR PFX "Cannot allocate network device\n"); + err = -ENOMEM; + goto fail_alloc; + } + + priv = netdev_priv(dev); + card = priv->card; + card->attr_mem = attr_mem; + dev->base_addr = pccard_ioaddr; + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + hermes_struct_init(&priv->hw, mem, HERMES_16BIT_REGSPACING); + + printk(KERN_DEBUG PFX "Detected Orinoco/Prism2 PLX device " + "at %s irq:%d, io addr:0x%lx\n", pci_name(pdev), pdev->irq, + pccard_ioaddr); + + err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ, + dev->name, dev); + if (err) { + printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq); + err = -EBUSY; + goto fail_irq; + } + dev->irq = pdev->irq; + + /* bjoern: We need to tell the card to enable interrupts, in + case the serial eprom didn't do this already. See the + PLX9052 data book, p8-1 and 8-24 for reference. */ + csr_reg = inl(plx_addr + PLX_INTCSR); + if (!(csr_reg & PLX_INTCSR_INTEN)) { + csr_reg |= PLX_INTCSR_INTEN; + outl(csr_reg, plx_addr + PLX_INTCSR); + csr_reg = inl(plx_addr + PLX_INTCSR); + if (!(csr_reg & PLX_INTCSR_INTEN)) { + printk(KERN_ERR PFX "Cannot enable interrupts\n"); + goto fail; + } + } + + err = orinoco_plx_cor_reset(priv); + if (err) { + printk(KERN_ERR PFX "Initial reset failed\n"); + goto fail; + } + + printk(KERN_DEBUG PFX "CIS: "); + for (i = 0; i < 16; i++) { + printk("%02X:", readb(attr_mem + 2*i)); + } + printk("\n"); + + /* Verify whether a supported PC card is present */ + /* FIXME: we probably need to be smarted about this */ + for (i = 0; i < sizeof(cis_magic); i++) { + if (cis_magic[i] != readb(attr_mem +2*i)) { + printk(KERN_ERR PFX "The CIS value of Prism2 PC " + "card is unexpected\n"); + err = -EIO; + goto fail; + } + } + + err = register_netdev(dev); + if (err) { + printk(KERN_ERR PFX "Cannot register network device\n"); + goto fail; + } + + pci_set_drvdata(pdev, dev); + + return 0; + + fail: + free_irq(pdev->irq, dev); + + fail_irq: + pci_set_drvdata(pdev, NULL); + free_orinocodev(dev); + + fail_alloc: + pci_iounmap(pdev, mem); + + fail_map_io: + iounmap(attr_mem); + + fail_map_attr: + pci_release_regions(pdev); + + fail_resources: + pci_disable_device(pdev); + + return err; +} + +static void __devexit orinoco_plx_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct orinoco_private *priv = netdev_priv(dev); + struct orinoco_plx_card *card = priv->card; + u8 __iomem *attr_mem = card->attr_mem; + + BUG_ON(! dev); + + unregister_netdev(dev); + free_irq(dev->irq, dev); + pci_set_drvdata(pdev, NULL); + free_orinocodev(dev); + pci_iounmap(pdev, priv->hw.iobase); + iounmap(attr_mem); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + + +static struct pci_device_id orinoco_plx_pci_id_table[] = { + {0x111a, 0x1023, PCI_ANY_ID, PCI_ANY_ID,}, /* Siemens SpeedStream SS1023 */ + {0x1385, 0x4100, PCI_ANY_ID, PCI_ANY_ID,}, /* Netgear MA301 */ + {0x15e8, 0x0130, PCI_ANY_ID, PCI_ANY_ID,}, /* Correga - does this work? */ + {0x1638, 0x1100, PCI_ANY_ID, PCI_ANY_ID,}, /* SMC EZConnect SMC2602W, + Eumitcom PCI WL11000, + Addtron AWA-100 */ + {0x16ab, 0x1100, PCI_ANY_ID, PCI_ANY_ID,}, /* Global Sun Tech GL24110P */ + {0x16ab, 0x1101, PCI_ANY_ID, PCI_ANY_ID,}, /* Reported working, but unknown */ + {0x16ab, 0x1102, PCI_ANY_ID, PCI_ANY_ID,}, /* Linksys WDT11 */ + {0x16ec, 0x3685, PCI_ANY_ID, PCI_ANY_ID,}, /* USR 2415 */ + {0xec80, 0xec00, PCI_ANY_ID, PCI_ANY_ID,}, /* Belkin F5D6000 tested by + Brendan W. McAdams <rit AT jacked-in.org> */ + {0x10b7, 0x7770, PCI_ANY_ID, PCI_ANY_ID,}, /* 3Com AirConnect PCI tested by + Damien Persohn <damien AT persohn.net> */ + {0,}, +}; + +MODULE_DEVICE_TABLE(pci, orinoco_plx_pci_id_table); + +static struct pci_driver orinoco_plx_driver = { + .name = DRIVER_NAME, + .id_table = orinoco_plx_pci_id_table, + .probe = orinoco_plx_init_one, + .remove = __devexit_p(orinoco_plx_remove_one), +}; + +static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION + " (Pavel Roskin <proski@gnu.org>," + " David Gibson <hermes@gibson.dropbear.id.au>," + " Daniel Barlow <dan@telent.net>)"; +MODULE_AUTHOR("Daniel Barlow <dan@telent.net>"); +MODULE_DESCRIPTION("Driver for wireless LAN cards using the PLX9052 PCI bridge"); +MODULE_LICENSE("Dual MPL/GPL"); + +static int __init orinoco_plx_init(void) +{ + printk(KERN_DEBUG "%s\n", version); + return pci_module_init(&orinoco_plx_driver); +} + +static void __exit orinoco_plx_exit(void) +{ + pci_unregister_driver(&orinoco_plx_driver); + ssleep(1); +} + +module_init(orinoco_plx_init); +module_exit(orinoco_plx_exit); + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * tab-width: 8 + * End: + */ |