diff options
Diffstat (limited to 'drivers/ieee1394/hosts.c')
-rw-r--r-- | drivers/ieee1394/hosts.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/drivers/ieee1394/hosts.c b/drivers/ieee1394/hosts.c deleted file mode 100644 index e947d8ffac8..00000000000 --- a/drivers/ieee1394/hosts.c +++ /dev/null @@ -1,249 +0,0 @@ -/* - * IEEE 1394 for Linux - * - * Low level (host adapter) management. - * - * Copyright (C) 1999 Andreas E. Bombe - * Copyright (C) 1999 Emanuel Pirker - * - * This code is licensed under the GPL. See the file COPYING in the root - * directory of the kernel sources for details. - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/list.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/timer.h> -#include <linux/jiffies.h> -#include <linux/mutex.h> - -#include "csr1212.h" -#include "ieee1394.h" -#include "ieee1394_types.h" -#include "hosts.h" -#include "ieee1394_core.h" -#include "highlevel.h" -#include "nodemgr.h" -#include "csr.h" -#include "config_roms.h" - - -static void delayed_reset_bus(struct work_struct *work) -{ - struct hpsb_host *host = - container_of(work, struct hpsb_host, delayed_reset.work); - u8 generation = host->csr.generation + 1; - - /* The generation field rolls over to 2 rather than 0 per IEEE - * 1394a-2000. */ - if (generation > 0xf || generation < 2) - generation = 2; - - csr_set_bus_info_generation(host->csr.rom, generation); - if (csr1212_generate_csr_image(host->csr.rom) != CSR1212_SUCCESS) { - /* CSR image creation failed. - * Reset generation field and do not issue a bus reset. */ - csr_set_bus_info_generation(host->csr.rom, - host->csr.generation); - return; - } - - host->csr.generation = generation; - - host->update_config_rom = 0; - if (host->driver->set_hw_config_rom) - host->driver->set_hw_config_rom(host, - host->csr.rom->bus_info_data); - - host->csr.gen_timestamp[host->csr.generation] = jiffies; - hpsb_reset_bus(host, SHORT_RESET); -} - -static int dummy_transmit_packet(struct hpsb_host *h, struct hpsb_packet *p) -{ - return 0; -} - -static int dummy_devctl(struct hpsb_host *h, enum devctl_cmd c, int arg) -{ - return -1; -} - -static int dummy_isoctl(struct hpsb_iso *iso, enum isoctl_cmd command, - unsigned long arg) -{ - return -1; -} - -static struct hpsb_host_driver dummy_driver = { - .transmit_packet = dummy_transmit_packet, - .devctl = dummy_devctl, - .isoctl = dummy_isoctl -}; - -static int alloc_hostnum_cb(struct hpsb_host *host, void *__data) -{ - int *hostnum = __data; - - if (host->id == *hostnum) - return 1; - - return 0; -} - -static DEFINE_MUTEX(host_num_alloc); - -/** - * hpsb_alloc_host - allocate a new host controller. - * @drv: the driver that will manage the host controller - * @extra: number of extra bytes to allocate for the driver - * - * Allocate a &hpsb_host and initialize the general subsystem specific - * fields. If the driver needs to store per host data, as drivers - * usually do, the amount of memory required can be specified by the - * @extra parameter. Once allocated, the driver should initialize the - * driver specific parts, enable the controller and make it available - * to the general subsystem using hpsb_add_host(). - * - * Return Value: a pointer to the &hpsb_host if successful, %NULL if - * no memory was available. - */ -struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra, - struct device *dev) -{ - struct hpsb_host *h; - int i; - int hostnum = 0; - - h = kzalloc(sizeof(*h) + extra, GFP_KERNEL); - if (!h) - return NULL; - - h->csr.rom = csr1212_create_csr(&csr_bus_ops, CSR_BUS_INFO_SIZE, h); - if (!h->csr.rom) - goto fail; - - h->hostdata = h + 1; - h->driver = drv; - - INIT_LIST_HEAD(&h->pending_packets); - INIT_LIST_HEAD(&h->addr_space); - - for (i = 2; i < 16; i++) - h->csr.gen_timestamp[i] = jiffies - 60 * HZ; - - atomic_set(&h->generation, 0); - - INIT_DELAYED_WORK(&h->delayed_reset, delayed_reset_bus); - - init_timer(&h->timeout); - h->timeout.data = (unsigned long) h; - h->timeout.function = abort_timedouts; - h->timeout_interval = HZ / 20; /* 50ms, half of minimum SPLIT_TIMEOUT */ - - h->topology_map = h->csr.topology_map + 3; - h->speed_map = (u8 *)(h->csr.speed_map + 2); - - mutex_lock(&host_num_alloc); - while (nodemgr_for_each_host(&hostnum, alloc_hostnum_cb)) - hostnum++; - mutex_unlock(&host_num_alloc); - h->id = hostnum; - - memcpy(&h->device, &nodemgr_dev_template_host, sizeof(h->device)); - h->device.parent = dev; - set_dev_node(&h->device, dev_to_node(dev)); - dev_set_name(&h->device, "fw-host%d", h->id); - - h->host_dev.parent = &h->device; - h->host_dev.class = &hpsb_host_class; - dev_set_name(&h->host_dev, "fw-host%d", h->id); - - if (device_register(&h->device)) - goto fail; - if (device_register(&h->host_dev)) { - device_unregister(&h->device); - goto fail; - } - get_device(&h->device); - - return h; - -fail: - kfree(h); - return NULL; -} - -int hpsb_add_host(struct hpsb_host *host) -{ - if (hpsb_default_host_entry(host)) - return -ENOMEM; - - highlevel_add_host(host); - return 0; -} - -void hpsb_resume_host(struct hpsb_host *host) -{ - if (host->driver->set_hw_config_rom) - host->driver->set_hw_config_rom(host, - host->csr.rom->bus_info_data); - host->driver->devctl(host, RESET_BUS, SHORT_RESET); -} - -void hpsb_remove_host(struct hpsb_host *host) -{ - host->is_shutdown = 1; - - cancel_delayed_work(&host->delayed_reset); - flush_scheduled_work(); - - host->driver = &dummy_driver; - highlevel_remove_host(host); - - device_unregister(&host->host_dev); - device_unregister(&host->device); -} - -/** - * hpsb_update_config_rom_image - updates configuration ROM image of a host - * - * Updates the configuration ROM image of a host. rom_version must be the - * current version, otherwise it will fail with return value -1. If this - * host does not support config-rom-update, it will return -%EINVAL. - * Return value 0 indicates success. - */ -int hpsb_update_config_rom_image(struct hpsb_host *host) -{ - unsigned long reset_delay; - int next_gen = host->csr.generation + 1; - - if (!host->update_config_rom) - return -EINVAL; - - if (next_gen > 0xf) - next_gen = 2; - - /* Stop the delayed interrupt, we're about to change the config rom and - * it would be a waste to do a bus reset twice. */ - cancel_delayed_work(&host->delayed_reset); - - /* IEEE 1394a-2000 prohibits using the same generation number - * twice in a 60 second period. */ - if (time_before(jiffies, host->csr.gen_timestamp[next_gen] + 60 * HZ)) - /* Wait 60 seconds from the last time this generation number was - * used. */ - reset_delay = - (60 * HZ) + host->csr.gen_timestamp[next_gen] - jiffies; - else - /* Wait 1 second in case some other code wants to change the - * Config ROM in the near future. */ - reset_delay = HZ; - - PREPARE_DELAYED_WORK(&host->delayed_reset, delayed_reset_bus); - schedule_delayed_work(&host->delayed_reset, reset_delay); - - return 0; -} |