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 e947d8ffac85..000000000000 --- a/drivers/ieee1394/hosts.c +++ /dev/null | |||
| @@ -1,249 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * IEEE 1394 for Linux | ||
| 3 | * | ||
| 4 | * Low level (host adapter) management. | ||
| 5 | * | ||
| 6 | * Copyright (C) 1999 Andreas E. Bombe | ||
| 7 | * Copyright (C) 1999 Emanuel Pirker | ||
| 8 | * | ||
| 9 | * This code is licensed under the GPL. See the file COPYING in the root | ||
| 10 | * directory of the kernel sources for details. | ||
| 11 | */ | ||
| 12 | |||
| 13 | #include <linux/module.h> | ||
| 14 | #include <linux/types.h> | ||
| 15 | #include <linux/list.h> | ||
| 16 | #include <linux/init.h> | ||
| 17 | #include <linux/slab.h> | ||
| 18 | #include <linux/timer.h> | ||
| 19 | #include <linux/jiffies.h> | ||
| 20 | #include <linux/mutex.h> | ||
| 21 | |||
| 22 | #include "csr1212.h" | ||
| 23 | #include "ieee1394.h" | ||
| 24 | #include "ieee1394_types.h" | ||
| 25 | #include "hosts.h" | ||
| 26 | #include "ieee1394_core.h" | ||
| 27 | #include "highlevel.h" | ||
| 28 | #include "nodemgr.h" | ||
| 29 | #include "csr.h" | ||
| 30 | #include "config_roms.h" | ||
| 31 | |||
| 32 | |||
| 33 | static void delayed_reset_bus(struct work_struct *work) | ||
| 34 | { | ||
| 35 | struct hpsb_host *host = | ||
| 36 | container_of(work, struct hpsb_host, delayed_reset.work); | ||
| 37 | u8 generation = host->csr.generation + 1; | ||
| 38 | |||
| 39 | /* The generation field rolls over to 2 rather than 0 per IEEE | ||
| 40 | * 1394a-2000. */ | ||
| 41 | if (generation > 0xf || generation < 2) | ||
| 42 | generation = 2; | ||
| 43 | |||
| 44 | csr_set_bus_info_generation(host->csr.rom, generation); | ||
| 45 | if (csr1212_generate_csr_image(host->csr.rom) != CSR1212_SUCCESS) { | ||
| 46 | /* CSR image creation failed. | ||
| 47 | * Reset generation field and do not issue a bus reset. */ | ||
| 48 | csr_set_bus_info_generation(host->csr.rom, | ||
| 49 | host->csr.generation); | ||
| 50 | return; | ||
| 51 | } | ||
| 52 | |||
| 53 | host->csr.generation = generation; | ||
| 54 | |||
| 55 | host->update_config_rom = 0; | ||
| 56 | if (host->driver->set_hw_config_rom) | ||
| 57 | host->driver->set_hw_config_rom(host, | ||
| 58 | host->csr.rom->bus_info_data); | ||
| 59 | |||
| 60 | host->csr.gen_timestamp[host->csr.generation] = jiffies; | ||
| 61 | hpsb_reset_bus(host, SHORT_RESET); | ||
| 62 | } | ||
| 63 | |||
| 64 | static int dummy_transmit_packet(struct hpsb_host *h, struct hpsb_packet *p) | ||
| 65 | { | ||
| 66 | return 0; | ||
| 67 | } | ||
| 68 | |||
| 69 | static int dummy_devctl(struct hpsb_host *h, enum devctl_cmd c, int arg) | ||
| 70 | { | ||
| 71 | return -1; | ||
| 72 | } | ||
| 73 | |||
| 74 | static int dummy_isoctl(struct hpsb_iso *iso, enum isoctl_cmd command, | ||
| 75 | unsigned long arg) | ||
| 76 | { | ||
| 77 | return -1; | ||
| 78 | } | ||
| 79 | |||
| 80 | static struct hpsb_host_driver dummy_driver = { | ||
| 81 | .transmit_packet = dummy_transmit_packet, | ||
| 82 | .devctl = dummy_devctl, | ||
| 83 | .isoctl = dummy_isoctl | ||
| 84 | }; | ||
| 85 | |||
| 86 | static int alloc_hostnum_cb(struct hpsb_host *host, void *__data) | ||
| 87 | { | ||
| 88 | int *hostnum = __data; | ||
| 89 | |||
| 90 | if (host->id == *hostnum) | ||
| 91 | return 1; | ||
| 92 | |||
| 93 | return 0; | ||
| 94 | } | ||
| 95 | |||
| 96 | static DEFINE_MUTEX(host_num_alloc); | ||
| 97 | |||
| 98 | /** | ||
| 99 | * hpsb_alloc_host - allocate a new host controller. | ||
| 100 | * @drv: the driver that will manage the host controller | ||
| 101 | * @extra: number of extra bytes to allocate for the driver | ||
| 102 | * | ||
| 103 | * Allocate a &hpsb_host and initialize the general subsystem specific | ||
| 104 | * fields. If the driver needs to store per host data, as drivers | ||
| 105 | * usually do, the amount of memory required can be specified by the | ||
| 106 | * @extra parameter. Once allocated, the driver should initialize the | ||
| 107 | * driver specific parts, enable the controller and make it available | ||
| 108 | * to the general subsystem using hpsb_add_host(). | ||
| 109 | * | ||
| 110 | * Return Value: a pointer to the &hpsb_host if successful, %NULL if | ||
| 111 | * no memory was available. | ||
| 112 | */ | ||
| 113 | struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra, | ||
| 114 | struct device *dev) | ||
| 115 | { | ||
| 116 | struct hpsb_host *h; | ||
| 117 | int i; | ||
| 118 | int hostnum = 0; | ||
| 119 | |||
| 120 | h = kzalloc(sizeof(*h) + extra, GFP_KERNEL); | ||
| 121 | if (!h) | ||
| 122 | return NULL; | ||
| 123 | |||
| 124 | h->csr.rom = csr1212_create_csr(&csr_bus_ops, CSR_BUS_INFO_SIZE, h); | ||
| 125 | if (!h->csr.rom) | ||
| 126 | goto fail; | ||
| 127 | |||
| 128 | h->hostdata = h + 1; | ||
| 129 | h->driver = drv; | ||
| 130 | |||
| 131 | INIT_LIST_HEAD(&h->pending_packets); | ||
| 132 | INIT_LIST_HEAD(&h->addr_space); | ||
| 133 | |||
| 134 | for (i = 2; i < 16; i++) | ||
| 135 | h->csr.gen_timestamp[i] = jiffies - 60 * HZ; | ||
| 136 | |||
| 137 | atomic_set(&h->generation, 0); | ||
| 138 | |||
| 139 | INIT_DELAYED_WORK(&h->delayed_reset, delayed_reset_bus); | ||
| 140 | |||
| 141 | init_timer(&h->timeout); | ||
| 142 | h->timeout.data = (unsigned long) h; | ||
| 143 | h->timeout.function = abort_timedouts; | ||
| 144 | h->timeout_interval = HZ / 20; /* 50ms, half of minimum SPLIT_TIMEOUT */ | ||
| 145 | |||
| 146 | h->topology_map = h->csr.topology_map + 3; | ||
| 147 | h->speed_map = (u8 *)(h->csr.speed_map + 2); | ||
| 148 | |||
| 149 | mutex_lock(&host_num_alloc); | ||
| 150 | while (nodemgr_for_each_host(&hostnum, alloc_hostnum_cb)) | ||
| 151 | hostnum++; | ||
| 152 | mutex_unlock(&host_num_alloc); | ||
| 153 | h->id = hostnum; | ||
| 154 | |||
| 155 | memcpy(&h->device, &nodemgr_dev_template_host, sizeof(h->device)); | ||
| 156 | h->device.parent = dev; | ||
| 157 | set_dev_node(&h->device, dev_to_node(dev)); | ||
| 158 | dev_set_name(&h->device, "fw-host%d", h->id); | ||
| 159 | |||
| 160 | h->host_dev.parent = &h->device; | ||
| 161 | h->host_dev.class = &hpsb_host_class; | ||
| 162 | dev_set_name(&h->host_dev, "fw-host%d", h->id); | ||
| 163 | |||
| 164 | if (device_register(&h->device)) | ||
| 165 | goto fail; | ||
| 166 | if (device_register(&h->host_dev)) { | ||
| 167 | device_unregister(&h->device); | ||
| 168 | goto fail; | ||
| 169 | } | ||
| 170 | get_device(&h->device); | ||
| 171 | |||
| 172 | return h; | ||
| 173 | |||
| 174 | fail: | ||
| 175 | kfree(h); | ||
| 176 | return NULL; | ||
| 177 | } | ||
| 178 | |||
| 179 | int hpsb_add_host(struct hpsb_host *host) | ||
| 180 | { | ||
| 181 | if (hpsb_default_host_entry(host)) | ||
| 182 | return -ENOMEM; | ||
| 183 | |||
| 184 | highlevel_add_host(host); | ||
| 185 | return 0; | ||
| 186 | } | ||
| 187 | |||
| 188 | void hpsb_resume_host(struct hpsb_host *host) | ||
| 189 | { | ||
| 190 | if (host->driver->set_hw_config_rom) | ||
| 191 | host->driver->set_hw_config_rom(host, | ||
| 192 | host->csr.rom->bus_info_data); | ||
| 193 | host->driver->devctl(host, RESET_BUS, SHORT_RESET); | ||
| 194 | } | ||
| 195 | |||
| 196 | void hpsb_remove_host(struct hpsb_host *host) | ||
| 197 | { | ||
| 198 | host->is_shutdown = 1; | ||
| 199 | |||
| 200 | cancel_delayed_work(&host->delayed_reset); | ||
| 201 | flush_scheduled_work(); | ||
| 202 | |||
| 203 | host->driver = &dummy_driver; | ||
| 204 | highlevel_remove_host(host); | ||
| 205 | |||
| 206 | device_unregister(&host->host_dev); | ||
| 207 | device_unregister(&host->device); | ||
| 208 | } | ||
| 209 | |||
| 210 | /** | ||
| 211 | * hpsb_update_config_rom_image - updates configuration ROM image of a host | ||
| 212 | * | ||
| 213 | * Updates the configuration ROM image of a host. rom_version must be the | ||
| 214 | * current version, otherwise it will fail with return value -1. If this | ||
| 215 | * host does not support config-rom-update, it will return -%EINVAL. | ||
| 216 | * Return value 0 indicates success. | ||
| 217 | */ | ||
| 218 | int hpsb_update_config_rom_image(struct hpsb_host *host) | ||
| 219 | { | ||
| 220 | unsigned long reset_delay; | ||
| 221 | int next_gen = host->csr.generation + 1; | ||
| 222 | |||
| 223 | if (!host->update_config_rom) | ||
| 224 | return -EINVAL; | ||
| 225 | |||
| 226 | if (next_gen > 0xf) | ||
| 227 | next_gen = 2; | ||
| 228 | |||
| 229 | /* Stop the delayed interrupt, we're about to change the config rom and | ||
| 230 | * it would be a waste to do a bus reset twice. */ | ||
| 231 | cancel_delayed_work(&host->delayed_reset); | ||
| 232 | |||
| 233 | /* IEEE 1394a-2000 prohibits using the same generation number | ||
| 234 | * twice in a 60 second period. */ | ||
| 235 | if (time_before(jiffies, host->csr.gen_timestamp[next_gen] + 60 * HZ)) | ||
| 236 | /* Wait 60 seconds from the last time this generation number was | ||
| 237 | * used. */ | ||
| 238 | reset_delay = | ||
| 239 | (60 * HZ) + host->csr.gen_timestamp[next_gen] - jiffies; | ||
| 240 | else | ||
| 241 | /* Wait 1 second in case some other code wants to change the | ||
| 242 | * Config ROM in the near future. */ | ||
| 243 | reset_delay = HZ; | ||
| 244 | |||
| 245 | PREPARE_DELAYED_WORK(&host->delayed_reset, delayed_reset_bus); | ||
| 246 | schedule_delayed_work(&host->delayed_reset, reset_delay); | ||
| 247 | |||
| 248 | return 0; | ||
| 249 | } | ||
