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linux
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drivers
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net
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wireless
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orinoco
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spectrum_cs.c
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linux
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orinoco
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spectrum_cs.c
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/* * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as * Symbol Wireless Networker LA4137, CompactFlash cards by Socket * Communications and Intel PRO/Wireless 2011B. * * The driver implements Symbol firmware download. The rest is handled * in hermes.c and orinoco.c. * * Utilities for downloading the Symbol firmware are available at * http://sourceforge.net/projects/orinoco/ * * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org> * Portions based on orinoco_cs.c: * Copyright (C) David Gibson, Linuxcare Australia * Portions based on Spectrum24tDnld.c from original spectrum24 driver: * Copyright (C) Symbol Technologies. * * See copyright notice in file orinoco.c. */ #define DRIVER_NAME "spectrum_cs" #define PFX DRIVER_NAME ": " #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <pcmcia/cs_types.h> #include <pcmcia/cs.h> #include <pcmcia/cistpl.h> #include <pcmcia/cisreg.h> #include <pcmcia/ds.h> #include "orinoco.h" /********************************************************************/ /* Module stuff */ /********************************************************************/ MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>"); MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader"); MODULE_LICENSE("Dual MPL/GPL"); /* Module parameters */ /* Some D-Link cards have buggy CIS. They do work at 5v properly, but * don't have any CIS entry for it. This workaround it... */ static int ignore_cis_vcc; /* = 0 */ module_param(ignore_cis_vcc, int, 0); MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket"); /********************************************************************/ /* Data structures */ /********************************************************************/ /* PCMCIA specific device information (goes in the card field of * struct orinoco_private */ struct orinoco_pccard { struct pcmcia_device *p_dev; dev_node_t node; }; /********************************************************************/ /* Function prototypes */ /********************************************************************/ static int spectrum_cs_config(struct pcmcia_device *link); static void spectrum_cs_release(struct pcmcia_device *link); /* Constants for the CISREG_CCSR register */ #define HCR_RUN 0x07 /* run firmware after reset */ #define HCR_IDLE 0x0E /* don't run firmware after reset */ #define HCR_MEM16 0x10 /* memory width bit, should be preserved */ #define CS_CHECK(fn, ret) \ do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) /* * Reset the card using configuration registers COR and CCSR. * If IDLE is 1, stop the firmware, so that it can be safely rewritten. */ static int spectrum_reset(struct pcmcia_device *link, int idle) { int last_ret, last_fn; conf_reg_t reg; u_int save_cor; /* Doing it if hardware is gone is guaranteed crash */ if (!pcmcia_dev_present(link)) return -ENODEV; /* Save original COR value */ reg.Function = 0; reg.Action = CS_READ; reg.Offset = CISREG_COR; CS_CHECK(AccessConfigurationRegister, pcmcia_access_configuration_register(link, ®)); save_cor = reg.Value; /* Soft-Reset card */ reg.Action = CS_WRITE; reg.Offset = CISREG_COR; reg.Value = (save_cor | COR_SOFT_RESET); CS_CHECK(AccessConfigurationRegister, pcmcia_access_configuration_register(link, ®)); udelay(1000); /* Read CCSR */ reg.Action = CS_READ; reg.Offset = CISREG_CCSR; CS_CHECK(AccessConfigurationRegister, pcmcia_access_configuration_register(link, ®)); /* * Start or stop the firmware. Memory width bit should be * preserved from the value we've just read. */ reg.Action = CS_WRITE; reg.Offset = CISREG_CCSR; reg.Value = (idle ? HCR_IDLE : HCR_RUN) | (reg.Value & HCR_MEM16); CS_CHECK(AccessConfigurationRegister, pcmcia_access_configuration_register(link, ®)); udelay(1000); /* Restore original COR configuration index */ reg.Action = CS_WRITE; reg.Offset = CISREG_COR; reg.Value = (save_cor & ~COR_SOFT_RESET); CS_CHECK(AccessConfigurationRegister, pcmcia_access_configuration_register(link, ®)); udelay(1000); return 0; cs_failed: cs_error(link, last_fn, last_ret); return -ENODEV; } /********************************************************************/ /* Device methods */ /********************************************************************/ static int spectrum_cs_hard_reset(struct orinoco_private *priv) { struct orinoco_pccard *card = priv->card; struct pcmcia_device *link = card->p_dev; /* Soft reset using COR and HCR */ spectrum_reset(link, 0); return 0; } static int spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle) { struct orinoco_pccard *card = priv->card; struct pcmcia_device *link = card->p_dev; return spectrum_reset(link, idle); } /********************************************************************/ /* PCMCIA stuff */ /********************************************************************/ /* * This creates an "instance" of the driver, allocating local data * structures for one device. The device is registered with Card * Services. * * The dev_link structure is initialized, but we don't actually * configure the card at this point -- we wait until we receive a card * insertion event. */ static int spectrum_cs_probe(struct pcmcia_device *link) { struct net_device *dev; struct orinoco_private *priv; struct orinoco_pccard *card; dev = alloc_orinocodev(sizeof(*card), &handle_to_dev(link), spectrum_cs_hard_reset, spectrum_cs_stop_firmware); if (! dev) return -ENOMEM; priv = netdev_priv(dev); card = priv->card; /* Link both structures together */ card->p_dev = link; link->priv = dev; /* Interrupt setup */ link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT; link->irq.IRQInfo1 = IRQ_LEVEL_ID; link->irq.Handler = orinoco_interrupt; link->irq.Instance = dev; /* General socket configuration defaults can go here. In this * client, we assume very little, and rely on the CIS for * almost everything. In most clients, many details (i.e., * number, sizes, and attributes of IO windows) are fixed by * the nature of the device, and can be hard-wired here. */ link->conf.Attributes = 0; link->conf.IntType = INT_MEMORY_AND_IO; return spectrum_cs_config(link); } /* spectrum_cs_attach */ /* * This deletes a driver "instance". The device is de-registered with * Card Services. If it has been released, all local data structures * are freed. Otherwise, the structures will be freed when the device * is released. */ static void spectrum_cs_detach(struct pcmcia_device *link) { struct net_device *dev = link->priv; if (link->dev_node) unregister_netdev(dev); spectrum_cs_release(link); free_orinocodev(dev); } /* spectrum_cs_detach */ /* * spectrum_cs_config() is scheduled to run after a CARD_INSERTION * event is received, to configure the PCMCIA socket, and to make the * device available to the system. */ static int spectrum_cs_config_check(struct pcmcia_device *p_dev, cistpl_cftable_entry_t *cfg, cistpl_cftable_entry_t *dflt, unsigned int vcc, void *priv_data) { if (cfg->index == 0) goto next_entry; /* Use power settings for Vcc and Vpp if present */ /* Note that the CIS values need to be rescaled */ if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) { if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) { DEBUG(2, "spectrum_cs_config: Vcc mismatch (vcc = %d, CIS = %d)\n", vcc, cfg->vcc.param[CISTPL_POWER_VNOM] / 10000); if (!ignore_cis_vcc) goto next_entry; } } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) { if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000) { DEBUG(2, "spectrum_cs_config: Vcc mismatch (vcc = %d, CIS = %d)\n", vcc, dflt->vcc.param[CISTPL_POWER_VNOM] / 10000); if (!ignore_cis_vcc) goto next_entry; } } if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM)) p_dev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000; else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM)) p_dev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000; /* Do we need to allocate an interrupt? */ p_dev->conf.Attributes |= CONF_ENABLE_IRQ; /* IO window settings */ p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0; if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; if (!(io->flags & CISTPL_IO_8BIT)) p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; if (!(io->flags & CISTPL_IO_16BIT)) p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; p_dev->io.BasePort1 = io->win[0].base; p_dev->io.NumPorts1 = io->win[0].len; if (io->nwin > 1) { p_dev->io.Attributes2 = p_dev->io.Attributes1; p_dev->io.BasePort2 = io->win[1].base; p_dev->io.NumPorts2 = io->win[1].len; } /* This reserves IO space but doesn't actually enable it */ if (pcmcia_request_io(p_dev, &p_dev->io) != 0) goto next_entry; } return 0; next_entry: pcmcia_disable_device(p_dev); return -ENODEV; }; static int spectrum_cs_config(struct pcmcia_device *link) { struct net_device *dev = link->priv; struct orinoco_private *priv = netdev_priv(dev); struct orinoco_pccard *card = priv->card; hermes_t *hw = &priv->hw; int last_fn, last_ret; void __iomem *mem; /* * In this loop, we scan the CIS for configuration table * entries, each of which describes a valid card * configuration, including voltage, IO window, memory window, * and interrupt settings. * * We make no assumptions about the card to be configured: we * use just the information available in the CIS. In an ideal * world, this would work for any PCMCIA card, but it requires * a complete and accurate CIS. In practice, a driver usually * "knows" most of these things without consulting the CIS, * and most client drivers will only use the CIS to fill in * implementation-defined details. */ last_ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL); if (last_ret) { if (!ignore_cis_vcc) printk(KERN_ERR PFX "GetNextTuple(): No matching " "CIS configuration. Maybe you need the " "ignore_cis_vcc=1 parameter.\n"); cs_error(link, RequestIO, last_ret); goto failed; } /* * Allocate an interrupt line. Note that this does not assign * a handler to the interrupt, unless the 'Handler' member of * the irq structure is initialized. */ CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq)); /* We initialize the hermes structure before completing PCMCIA * configuration just in case the interrupt handler gets * called. */ mem = ioport_map(link->io.BasePort1, link->io.NumPorts1); if (!mem) goto cs_failed; hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING); /* * This actually configures the PCMCIA socket -- setting up * the I/O windows and the interrupt mapping, and putting the * card and host interface into "Memory and IO" mode. */ CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf)); /* Ok, we have the configuration, prepare to register the netdev */ dev->base_addr = link->io.BasePort1; dev->irq = link->irq.AssignedIRQ; card->node.major = card->node.minor = 0; /* Reset card */ if (spectrum_cs_hard_reset(priv) != 0) { goto failed; } SET_NETDEV_DEV(dev, &handle_to_dev(link)); /* Tell the stack we exist */ if (register_netdev(dev) != 0) { printk(KERN_ERR PFX "register_netdev() failed\n"); goto failed; } /* At this point, the dev_node_t structure(s) needs to be * initialized and arranged in a linked list at link->dev_node. */ strcpy(card->node.dev_name, dev->name); link->dev_node = &card->node; /* link->dev_node being non-NULL is also used to indicate that the net_device has been registered */ /* Finally, report what we've done */ printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s, irq %d, io " "0x%04x-0x%04x\n", dev->name, dev_name(dev->dev.parent), link->irq.AssignedIRQ, link->io.BasePort1, link->io.BasePort1 + link->io.NumPorts1 - 1); return 0; cs_failed: cs_error(link, last_fn, last_ret); failed: spectrum_cs_release(link); return -ENODEV; } /* spectrum_cs_config */ /* * After a card is removed, spectrum_cs_release() will unregister the * device, and release the PCMCIA configuration. If the device is * still open, this will be postponed until it is closed. */ static void spectrum_cs_release(struct pcmcia_device *link) { struct net_device *dev = link->priv; struct orinoco_private *priv = netdev_priv(dev); unsigned long flags; /* We're committed to taking the device away now, so mark the * hardware as unavailable */ spin_lock_irqsave(&priv->lock, flags); priv->hw_unavailable++; spin_unlock_irqrestore(&priv->lock, flags); pcmcia_disable_device(link); if (priv->hw.iobase) ioport_unmap(priv->hw.iobase); } /* spectrum_cs_release */ static int spectrum_cs_suspend(struct pcmcia_device *link) { struct net_device *dev = link->priv; struct orinoco_private *priv = netdev_priv(dev); unsigned long flags; int err = 0; /* Mark the device as stopped, to block IO until later */ spin_lock_irqsave(&priv->lock, flags); err = __orinoco_down(dev); if (err) printk(KERN_WARNING "%s: Error %d downing interface\n", dev->name, err); netif_device_detach(dev); priv->hw_unavailable++; spin_unlock_irqrestore(&priv->lock, flags); return err; } static int spectrum_cs_resume(struct pcmcia_device *link) { struct net_device *dev = link->priv; struct orinoco_private *priv = netdev_priv(dev); netif_device_attach(dev); priv->hw_unavailable--; schedule_work(&priv->reset_work); return 0; } /********************************************************************/ /* Module initialization */ /********************************************************************/ /* Can't be declared "const" or the whole __initdata section will * become const */ static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION " (Pavel Roskin <proski@gnu.org>," " David Gibson <hermes@gibson.dropbear.id.au>, et al)"; static struct pcmcia_device_id spectrum_cs_ids[] = { PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */ PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */ PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */ PCMCIA_DEVICE_NULL, }; MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids); static struct pcmcia_driver orinoco_driver = { .owner = THIS_MODULE, .drv = { .name = DRIVER_NAME, }, .probe = spectrum_cs_probe, .remove = spectrum_cs_detach, .suspend = spectrum_cs_suspend, .resume = spectrum_cs_resume, .id_table = spectrum_cs_ids, }; static int __init init_spectrum_cs(void) { printk(KERN_DEBUG "%s\n", version); return pcmcia_register_driver(&orinoco_driver); } static void __exit exit_spectrum_cs(void) { pcmcia_unregister_driver(&orinoco_driver); } module_init(init_spectrum_cs); module_exit(exit_spectrum_cs);
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