mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
56604faed1
Use pci_is_bridge() to simplify code. No functional change. Requires:326c1cdae7PCI: Rename pci_is_bridge() to pci_has_subordinate() Requires:1c86438c94PCI: Add new pci_is_bridge() interface Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
|
|
* cardbus.c -- 16-bit PCMCIA core support
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* The initial developer of the original code is David A. Hinds
|
|
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
|
|
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
|
|
*
|
|
* (C) 1999 David A. Hinds
|
|
*/
|
|
|
|
/*
|
|
* Cardbus handling has been re-written to be more of a PCI bridge thing,
|
|
* and the PCI code basically does all the resource handling.
|
|
*
|
|
* Linus, Jan 2000
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <pcmcia/ss.h>
|
|
|
|
|
|
static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
list_for_each_entry(dev, &bus->devices, bus_list) {
|
|
u8 irq_pin;
|
|
|
|
/*
|
|
* Since there is only one interrupt available to
|
|
* CardBus devices, all devices downstream of this
|
|
* device must be using this IRQ.
|
|
*/
|
|
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq_pin);
|
|
if (irq_pin) {
|
|
dev->irq = irq;
|
|
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
|
|
}
|
|
|
|
/*
|
|
* Some controllers transfer very slowly with 0 CLS.
|
|
* Configure it. This may fail as CLS configuration
|
|
* is mandatory only for MWI.
|
|
*/
|
|
pci_set_cacheline_size(dev);
|
|
|
|
if (dev->subordinate)
|
|
cardbus_config_irq_and_cls(dev->subordinate, irq);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* cb_alloc() - add CardBus device
|
|
* @s: the pcmcia_socket where the CardBus device is located
|
|
*
|
|
* cb_alloc() allocates the kernel data structures for a Cardbus device
|
|
* and handles the lowest level PCI device setup issues.
|
|
*/
|
|
int __ref cb_alloc(struct pcmcia_socket *s)
|
|
{
|
|
struct pci_bus *bus = s->cb_dev->subordinate;
|
|
struct pci_dev *dev;
|
|
unsigned int max, pass;
|
|
|
|
pci_lock_rescan_remove();
|
|
|
|
s->functions = pci_scan_slot(bus, PCI_DEVFN(0, 0));
|
|
pci_fixup_cardbus(bus);
|
|
|
|
max = bus->busn_res.start;
|
|
for (pass = 0; pass < 2; pass++)
|
|
list_for_each_entry(dev, &bus->devices, bus_list)
|
|
if (pci_is_bridge(dev))
|
|
max = pci_scan_bridge(bus, dev, max, pass);
|
|
|
|
/*
|
|
* Size all resources below the CardBus controller.
|
|
*/
|
|
pci_bus_size_bridges(bus);
|
|
pci_bus_assign_resources(bus);
|
|
cardbus_config_irq_and_cls(bus, s->pci_irq);
|
|
|
|
/* socket specific tune function */
|
|
if (s->tune_bridge)
|
|
s->tune_bridge(s, bus);
|
|
|
|
pci_bus_add_devices(bus);
|
|
|
|
pci_unlock_rescan_remove();
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* cb_free() - remove CardBus device
|
|
* @s: the pcmcia_socket where the CardBus device was located
|
|
*
|
|
* cb_free() handles the lowest level PCI device cleanup.
|
|
*/
|
|
void cb_free(struct pcmcia_socket *s)
|
|
{
|
|
struct pci_dev *bridge, *dev, *tmp;
|
|
struct pci_bus *bus;
|
|
|
|
bridge = s->cb_dev;
|
|
if (!bridge)
|
|
return;
|
|
|
|
bus = bridge->subordinate;
|
|
if (!bus)
|
|
return;
|
|
|
|
pci_lock_rescan_remove();
|
|
|
|
list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list)
|
|
pci_stop_and_remove_bus_device(dev);
|
|
|
|
pci_unlock_rescan_remove();
|
|
}
|