| /* 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 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. |
| * |
| * Here's the general details on how the PLX9052 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 attribute space |
| * (containing the CIS). |
| * |
| * Using the later, you can read through the CIS data to make sure the |
| * card is compatible with the driver. Keep 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, in case 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). |
| */ |
| |
| #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/delay.h> |
| #include <linux/pci.h> |
| #include <pcmcia/cisreg.h> |
| |
| #include "orinoco.h" |
| #include "orinoco_pci.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 */ |
| |
| /* |
| * 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_pci_card *card = priv->card; |
| unsigned long timeout; |
| u16 reg; |
| |
| iowrite8(COR_VALUE | COR_RESET, card->attr_io + COR_OFFSET); |
| mdelay(1); |
| |
| iowrite8(COR_VALUE, card->attr_io + 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); |
| } |
| |
| /* Still busy? */ |
| if (reg & HERMES_CMD_BUSY) { |
| printk(KERN_ERR PFX "Busy timeout\n"); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static int orinoco_plx_hw_init(struct orinoco_pci_card *card) |
| { |
| int i; |
| u32 csr_reg; |
| static const u8 cis_magic[] = { |
| 0x01, 0x03, 0x00, 0x00, 0xff, 0x17, 0x04, 0x67 |
| }; |
| |
| printk(KERN_DEBUG PFX "CIS: "); |
| for (i = 0; i < 16; i++) { |
| printk("%02X:", ioread8(card->attr_io + (i << 1))); |
| } |
| 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] != ioread8(card->attr_io + (i << 1))) { |
| printk(KERN_ERR PFX "The CIS value of Prism2 PC " |
| "card is unexpected\n"); |
| return -ENODEV; |
| } |
| } |
| |
| /* 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 = ioread32(card->bridge_io + PLX_INTCSR); |
| if (!(csr_reg & PLX_INTCSR_INTEN)) { |
| csr_reg |= PLX_INTCSR_INTEN; |
| iowrite32(csr_reg, card->bridge_io + PLX_INTCSR); |
| csr_reg = ioread32(card->bridge_io + PLX_INTCSR); |
| if (!(csr_reg & PLX_INTCSR_INTEN)) { |
| printk(KERN_ERR PFX "Cannot enable interrupts\n"); |
| return -EIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int orinoco_plx_init_one(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| int err; |
| struct orinoco_private *priv; |
| struct orinoco_pci_card *card; |
| struct net_device *dev; |
| void __iomem *hermes_io, *attr_io, *bridge_io; |
| |
| 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) { |
| printk(KERN_ERR PFX "Cannot obtain PCI resources\n"); |
| goto fail_resources; |
| } |
| |
| bridge_io = pci_iomap(pdev, 1, 0); |
| if (!bridge_io) { |
| printk(KERN_ERR PFX "Cannot map bridge registers\n"); |
| err = -EIO; |
| goto fail_map_bridge; |
| } |
| |
| attr_io = pci_iomap(pdev, 2, 0); |
| if (!attr_io) { |
| printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n"); |
| err = -EIO; |
| goto fail_map_attr; |
| } |
| |
| hermes_io = pci_iomap(pdev, 3, 0); |
| if (!hermes_io) { |
| printk(KERN_ERR PFX "Cannot map chipset registers\n"); |
| err = -EIO; |
| goto fail_map_hermes; |
| } |
| |
| /* 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->bridge_io = bridge_io; |
| card->attr_io = attr_io; |
| SET_MODULE_OWNER(dev); |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| |
| hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING); |
| |
| 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; |
| } |
| orinoco_pci_setup_netdev(dev, pdev, 2); |
| |
| err = orinoco_plx_hw_init(card); |
| if (err) { |
| printk(KERN_ERR PFX "Hardware initialization failed\n"); |
| goto fail; |
| } |
| |
| err = orinoco_plx_cor_reset(priv); |
| if (err) { |
| printk(KERN_ERR PFX "Initial reset failed\n"); |
| 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, hermes_io); |
| |
| fail_map_hermes: |
| pci_iounmap(pdev, attr_io); |
| |
| fail_map_attr: |
| pci_iounmap(pdev, bridge_io); |
| |
| fail_map_bridge: |
| 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_pci_card *card = priv->card; |
| |
| unregister_netdev(dev); |
| free_irq(dev->irq, dev); |
| pci_set_drvdata(pdev, NULL); |
| free_orinocodev(dev); |
| pci_iounmap(pdev, priv->hw.iobase); |
| pci_iounmap(pdev, card->attr_io); |
| pci_iounmap(pdev, card->bridge_io); |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| } |
| |
| static struct pci_device_id orinoco_plx_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_id_table); |
| |
| static struct pci_driver orinoco_plx_driver = { |
| .name = DRIVER_NAME, |
| .id_table = orinoco_plx_id_table, |
| .probe = orinoco_plx_init_one, |
| .remove = __devexit_p(orinoco_plx_remove_one), |
| .suspend = orinoco_pci_suspend, |
| .resume = orinoco_pci_resume, |
| }; |
| |
| 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); |
| } |
| |
| module_init(orinoco_plx_init); |
| module_exit(orinoco_plx_exit); |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * tab-width: 8 |
| * End: |
| */ |