11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cardbus.c -- 16-bit PCMCIA core support 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License version 2 as 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * published by the Free Software Foundation. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The initial developer of the original code is David A. Hinds 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) 1999 David A. Hinds 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Cardbus handling has been re-written to be more of a PCI bridge thing, 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the PCI code basically does all the resource handling. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Linus, Jan 2000 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 2457197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski#include <linux/module.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/ss.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3015ea76d407d560f985224b65fe59c9db01692a0dTejun Heostatic void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq) 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 irq_pin; 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3715ea76d407d560f985224b65fe59c9db01692a0dTejun Heo /* 3815ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * Since there is only one interrupt available to 3915ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * CardBus devices, all devices downstream of this 4015ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * device must be using this IRQ. 4115ea76d407d560f985224b65fe59c9db01692a0dTejun Heo */ 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq_pin); 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (irq_pin) { 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->irq = irq; 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4815ea76d407d560f985224b65fe59c9db01692a0dTejun Heo /* 4915ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * Some controllers transfer very slowly with 0 CLS. 5015ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * Configure it. This may fail as CLS configuration 5115ea76d407d560f985224b65fe59c9db01692a0dTejun Heo * is mandatory only for MWI. 5215ea76d407d560f985224b65fe59c9db01692a0dTejun Heo */ 5315ea76d407d560f985224b65fe59c9db01692a0dTejun Heo pci_set_cacheline_size(dev); 5415ea76d407d560f985224b65fe59c9db01692a0dTejun Heo 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dev->subordinate) 5615ea76d407d560f985224b65fe59c9db01692a0dTejun Heo cardbus_config_irq_and_cls(dev->subordinate, irq); 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6057197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski/** 6157197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * cb_alloc() - add CardBus device 6257197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * @s: the pcmcia_socket where the CardBus device is located 6357197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * 6457197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * cb_alloc() allocates the kernel data structures for a Cardbus device 6557197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * and handles the lowest level PCI device setup issues. 6657197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski */ 679fea84f46a821aa1ff2d034ffda8ad33bff48015Dominik Brodowskiint __ref cb_alloc(struct pcmcia_socket *s) 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus = s->cb_dev->subordinate; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int max, pass; 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s->functions = pci_scan_slot(bus, PCI_DEVFN(0, 0)); 746e83ee075ed74941ccaad4fec503f6b24646e7e0Dominik Brodowski pci_fixup_cardbus(bus); 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max = bus->secondary; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (pass = 0; pass < 2; pass++) 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max = pci_scan_bridge(bus, dev, max, pass); 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Size all resources below the CardBus controller. 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_size_bridges(bus); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_assign_resources(bus); 8815ea76d407d560f985224b65fe59c9db01692a0dTejun Heo cardbus_config_irq_and_cls(bus, s->pci_irq); 898c3520d4eb3b1bbf2e45fbae8dcfb8db06d5e775Daniel Ritz 908c3520d4eb3b1bbf2e45fbae8dcfb8db06d5e775Daniel Ritz /* socket specific tune function */ 918c3520d4eb3b1bbf2e45fbae8dcfb8db06d5e775Daniel Ritz if (s->tune_bridge) 928c3520d4eb3b1bbf2e45fbae8dcfb8db06d5e775Daniel Ritz s->tune_bridge(s, bus); 938c3520d4eb3b1bbf2e45fbae8dcfb8db06d5e775Daniel Ritz 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_enable_bridges(bus); 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_add_devices(bus); 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 974c89e88bfde6a3c179790e21004f24e09a058290Dominik Brodowski return 0; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10057197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski/** 10157197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * cb_free() - remove CardBus device 10257197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * @s: the pcmcia_socket where the CardBus device was located 10357197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * 10457197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski * cb_free() handles the lowest level PCI device cleanup. 10557197b9b7712eb19f5344c466e8aefbac1adbe55Dominik Brodowski */ 1069fea84f46a821aa1ff2d034ffda8ad33bff48015Dominik Brodowskivoid cb_free(struct pcmcia_socket *s) 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = s->cb_dev; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge) 1116754b9e9c33502223db066de50dda8a876f70c2cYinghai Lu pci_stop_and_remove_behind_bridge(bridge); 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 113