10508ad1fSJeremy Kerr /* 20508ad1fSJeremy Kerr * FSI core driver 30508ad1fSJeremy Kerr * 40508ad1fSJeremy Kerr * Copyright (C) IBM Corporation 2016 50508ad1fSJeremy Kerr * 60508ad1fSJeremy Kerr * This program is free software; you can redistribute it and/or modify 70508ad1fSJeremy Kerr * it under the terms of the GNU General Public License version 2 as 80508ad1fSJeremy Kerr * published by the Free Software Foundation. 90508ad1fSJeremy Kerr * 100508ad1fSJeremy Kerr * This program is distributed in the hope that it will be useful, 110508ad1fSJeremy Kerr * but WITHOUT ANY WARRANTY; without even the implied warranty of 120508ad1fSJeremy Kerr * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 130508ad1fSJeremy Kerr * GNU General Public License for more details. 140508ad1fSJeremy Kerr */ 150508ad1fSJeremy Kerr 162b545cd8SJeremy Kerr #include <linux/crc4.h> 170508ad1fSJeremy Kerr #include <linux/device.h> 180508ad1fSJeremy Kerr #include <linux/fsi.h> 1909aecfabSJeremy Kerr #include <linux/idr.h> 200508ad1fSJeremy Kerr #include <linux/module.h> 212b545cd8SJeremy Kerr #include <linux/slab.h> 22f7ade2a6SJeremy Kerr #include <linux/bitops.h> 230508ad1fSJeremy Kerr 2409aecfabSJeremy Kerr #include "fsi-master.h" 2509aecfabSJeremy Kerr 26f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_NEXT_MASK GENMASK(31, 31) 27f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_SLOTS_MASK GENMASK(23, 16) 28f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_SLOTS_SHIFT 16 29f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_VERSION_MASK GENMASK(15, 12) 30f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_VERSION_SHIFT 12 31f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_TYPE_MASK GENMASK(11, 4) 32f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_TYPE_SHIFT 4 33f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_CRC_SHIFT 4 34f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_CRC_MASK GENMASK(3, 0) 35f7ade2a6SJeremy Kerr #define FSI_SLAVE_CONF_DATA_BITS 28 36f7ade2a6SJeremy Kerr 374efe37f4SJeremy Kerr #define FSI_PEEK_BASE 0x410 384efe37f4SJeremy Kerr 39f7ade2a6SJeremy Kerr static const int engine_page_size = 0x400; 40f7ade2a6SJeremy Kerr 412b37c3e2SChristopher Bostic #define FSI_SLAVE_BASE 0x800 422b37c3e2SChristopher Bostic 432b37c3e2SChristopher Bostic /* 442b37c3e2SChristopher Bostic * FSI slave engine control register offsets 452b37c3e2SChristopher Bostic */ 462b37c3e2SChristopher Bostic #define FSI_SMODE 0x0 /* R/W: Mode register */ 472b37c3e2SChristopher Bostic 482b37c3e2SChristopher Bostic /* 492b37c3e2SChristopher Bostic * SMODE fields 502b37c3e2SChristopher Bostic */ 512b37c3e2SChristopher Bostic #define FSI_SMODE_WSC 0x80000000 /* Warm start done */ 522b37c3e2SChristopher Bostic #define FSI_SMODE_ECRC 0x20000000 /* Hw CRC check */ 532b37c3e2SChristopher Bostic #define FSI_SMODE_SID_SHIFT 24 /* ID shift */ 542b37c3e2SChristopher Bostic #define FSI_SMODE_SID_MASK 3 /* ID Mask */ 552b37c3e2SChristopher Bostic #define FSI_SMODE_ED_SHIFT 20 /* Echo delay shift */ 562b37c3e2SChristopher Bostic #define FSI_SMODE_ED_MASK 0xf /* Echo delay mask */ 572b37c3e2SChristopher Bostic #define FSI_SMODE_SD_SHIFT 16 /* Send delay shift */ 582b37c3e2SChristopher Bostic #define FSI_SMODE_SD_MASK 0xf /* Send delay mask */ 592b37c3e2SChristopher Bostic #define FSI_SMODE_LBCRR_SHIFT 8 /* Clk ratio shift */ 602b37c3e2SChristopher Bostic #define FSI_SMODE_LBCRR_MASK 0xf /* Clk ratio mask */ 612b37c3e2SChristopher Bostic 622b545cd8SJeremy Kerr #define FSI_SLAVE_SIZE_23b 0x800000 632b545cd8SJeremy Kerr 6409aecfabSJeremy Kerr static DEFINE_IDA(master_ida); 6509aecfabSJeremy Kerr 66faf0b116SJeremy Kerr struct fsi_slave { 67faf0b116SJeremy Kerr struct device dev; 68faf0b116SJeremy Kerr struct fsi_master *master; 69faf0b116SJeremy Kerr int id; 70faf0b116SJeremy Kerr int link; 71faf0b116SJeremy Kerr uint32_t size; /* size of slave address space */ 72faf0b116SJeremy Kerr }; 73faf0b116SJeremy Kerr 74cd0fdb5cSChristopher Bostic #define to_fsi_master(d) container_of(d, struct fsi_master, dev) 75faf0b116SJeremy Kerr #define to_fsi_slave(d) container_of(d, struct fsi_slave, dev) 76faf0b116SJeremy Kerr 77014c2abcSJeremy Kerr static int fsi_master_read(struct fsi_master *master, int link, 78014c2abcSJeremy Kerr uint8_t slave_id, uint32_t addr, void *val, size_t size); 79014c2abcSJeremy Kerr static int fsi_master_write(struct fsi_master *master, int link, 80014c2abcSJeremy Kerr uint8_t slave_id, uint32_t addr, const void *val, size_t size); 81014c2abcSJeremy Kerr 824efe37f4SJeremy Kerr /* 834efe37f4SJeremy Kerr * fsi_device_read() / fsi_device_write() / fsi_device_peek() 844efe37f4SJeremy Kerr * 854efe37f4SJeremy Kerr * FSI endpoint-device support 864efe37f4SJeremy Kerr * 874efe37f4SJeremy Kerr * Read / write / peek accessors for a client 884efe37f4SJeremy Kerr * 894efe37f4SJeremy Kerr * Parameters: 904efe37f4SJeremy Kerr * dev: Structure passed to FSI client device drivers on probe(). 914efe37f4SJeremy Kerr * addr: FSI address of given device. Client should pass in its base address 924efe37f4SJeremy Kerr * plus desired offset to access its register space. 934efe37f4SJeremy Kerr * val: For read/peek this is the value read at the specified address. For 944efe37f4SJeremy Kerr * write this is value to write to the specified address. 954efe37f4SJeremy Kerr * The data in val must be FSI bus endian (big endian). 964efe37f4SJeremy Kerr * size: Size in bytes of the operation. Sizes supported are 1, 2 and 4 bytes. 974efe37f4SJeremy Kerr * Addresses must be aligned on size boundaries or an error will result. 984efe37f4SJeremy Kerr */ 994efe37f4SJeremy Kerr int fsi_device_read(struct fsi_device *dev, uint32_t addr, void *val, 1004efe37f4SJeremy Kerr size_t size) 1014efe37f4SJeremy Kerr { 1024efe37f4SJeremy Kerr if (addr > dev->size || size > dev->size || addr > dev->size - size) 1034efe37f4SJeremy Kerr return -EINVAL; 1044efe37f4SJeremy Kerr 1054efe37f4SJeremy Kerr return fsi_slave_read(dev->slave, dev->addr + addr, val, size); 1064efe37f4SJeremy Kerr } 1074efe37f4SJeremy Kerr EXPORT_SYMBOL_GPL(fsi_device_read); 1084efe37f4SJeremy Kerr 1094efe37f4SJeremy Kerr int fsi_device_write(struct fsi_device *dev, uint32_t addr, const void *val, 1104efe37f4SJeremy Kerr size_t size) 1114efe37f4SJeremy Kerr { 1124efe37f4SJeremy Kerr if (addr > dev->size || size > dev->size || addr > dev->size - size) 1134efe37f4SJeremy Kerr return -EINVAL; 1144efe37f4SJeremy Kerr 1154efe37f4SJeremy Kerr return fsi_slave_write(dev->slave, dev->addr + addr, val, size); 1164efe37f4SJeremy Kerr } 1174efe37f4SJeremy Kerr EXPORT_SYMBOL_GPL(fsi_device_write); 1184efe37f4SJeremy Kerr 1194efe37f4SJeremy Kerr int fsi_device_peek(struct fsi_device *dev, void *val) 1204efe37f4SJeremy Kerr { 1214efe37f4SJeremy Kerr uint32_t addr = FSI_PEEK_BASE + ((dev->unit - 2) * sizeof(uint32_t)); 1224efe37f4SJeremy Kerr 1234efe37f4SJeremy Kerr return fsi_slave_read(dev->slave, addr, val, sizeof(uint32_t)); 1244efe37f4SJeremy Kerr } 125f7ade2a6SJeremy Kerr 126f7ade2a6SJeremy Kerr static void fsi_device_release(struct device *_device) 127f7ade2a6SJeremy Kerr { 128f7ade2a6SJeremy Kerr struct fsi_device *device = to_fsi_dev(_device); 129f7ade2a6SJeremy Kerr 130f7ade2a6SJeremy Kerr kfree(device); 131f7ade2a6SJeremy Kerr } 132f7ade2a6SJeremy Kerr 133f7ade2a6SJeremy Kerr static struct fsi_device *fsi_create_device(struct fsi_slave *slave) 134f7ade2a6SJeremy Kerr { 135f7ade2a6SJeremy Kerr struct fsi_device *dev; 136f7ade2a6SJeremy Kerr 137f7ade2a6SJeremy Kerr dev = kzalloc(sizeof(*dev), GFP_KERNEL); 138f7ade2a6SJeremy Kerr if (!dev) 139f7ade2a6SJeremy Kerr return NULL; 140f7ade2a6SJeremy Kerr 141f7ade2a6SJeremy Kerr dev->dev.parent = &slave->dev; 142f7ade2a6SJeremy Kerr dev->dev.bus = &fsi_bus_type; 143f7ade2a6SJeremy Kerr dev->dev.release = fsi_device_release; 144f7ade2a6SJeremy Kerr 145f7ade2a6SJeremy Kerr return dev; 146f7ade2a6SJeremy Kerr } 147f7ade2a6SJeremy Kerr 148414c1026SJeremy Kerr /* FSI slave support */ 149014c2abcSJeremy Kerr static int fsi_slave_calc_addr(struct fsi_slave *slave, uint32_t *addrp, 150014c2abcSJeremy Kerr uint8_t *idp) 151014c2abcSJeremy Kerr { 152014c2abcSJeremy Kerr uint32_t addr = *addrp; 153014c2abcSJeremy Kerr uint8_t id = *idp; 154014c2abcSJeremy Kerr 155014c2abcSJeremy Kerr if (addr > slave->size) 156014c2abcSJeremy Kerr return -EINVAL; 157014c2abcSJeremy Kerr 158014c2abcSJeremy Kerr /* For 23 bit addressing, we encode the extra two bits in the slave 159014c2abcSJeremy Kerr * id (and the slave's actual ID needs to be 0). 160014c2abcSJeremy Kerr */ 161014c2abcSJeremy Kerr if (addr > 0x1fffff) { 162014c2abcSJeremy Kerr if (slave->id != 0) 163014c2abcSJeremy Kerr return -EINVAL; 164014c2abcSJeremy Kerr id = (addr >> 21) & 0x3; 165014c2abcSJeremy Kerr addr &= 0x1fffff; 166014c2abcSJeremy Kerr } 167014c2abcSJeremy Kerr 168014c2abcSJeremy Kerr *addrp = addr; 169014c2abcSJeremy Kerr *idp = id; 170014c2abcSJeremy Kerr return 0; 171014c2abcSJeremy Kerr } 172014c2abcSJeremy Kerr 173da36cadfSJeremy Kerr int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, 174014c2abcSJeremy Kerr void *val, size_t size) 175014c2abcSJeremy Kerr { 176014c2abcSJeremy Kerr uint8_t id = slave->id; 177014c2abcSJeremy Kerr int rc; 178014c2abcSJeremy Kerr 179014c2abcSJeremy Kerr rc = fsi_slave_calc_addr(slave, &addr, &id); 180014c2abcSJeremy Kerr if (rc) 181014c2abcSJeremy Kerr return rc; 182014c2abcSJeremy Kerr 183014c2abcSJeremy Kerr return fsi_master_read(slave->master, slave->link, id, 184014c2abcSJeremy Kerr addr, val, size); 185014c2abcSJeremy Kerr } 186da36cadfSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_slave_read); 187014c2abcSJeremy Kerr 188da36cadfSJeremy Kerr int fsi_slave_write(struct fsi_slave *slave, uint32_t addr, 189014c2abcSJeremy Kerr const void *val, size_t size) 190014c2abcSJeremy Kerr { 191014c2abcSJeremy Kerr uint8_t id = slave->id; 192014c2abcSJeremy Kerr int rc; 193014c2abcSJeremy Kerr 194014c2abcSJeremy Kerr rc = fsi_slave_calc_addr(slave, &addr, &id); 195014c2abcSJeremy Kerr if (rc) 196014c2abcSJeremy Kerr return rc; 197014c2abcSJeremy Kerr 198014c2abcSJeremy Kerr return fsi_master_write(slave->master, slave->link, id, 199014c2abcSJeremy Kerr addr, val, size); 200014c2abcSJeremy Kerr } 201da36cadfSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_slave_write); 202da36cadfSJeremy Kerr 203da36cadfSJeremy Kerr extern int fsi_slave_claim_range(struct fsi_slave *slave, 204da36cadfSJeremy Kerr uint32_t addr, uint32_t size) 205da36cadfSJeremy Kerr { 206da36cadfSJeremy Kerr if (addr + size < addr) 207da36cadfSJeremy Kerr return -EINVAL; 208da36cadfSJeremy Kerr 209da36cadfSJeremy Kerr if (addr + size > slave->size) 210da36cadfSJeremy Kerr return -EINVAL; 211da36cadfSJeremy Kerr 212da36cadfSJeremy Kerr /* todo: check for overlapping claims */ 213da36cadfSJeremy Kerr return 0; 214da36cadfSJeremy Kerr } 215da36cadfSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_slave_claim_range); 216da36cadfSJeremy Kerr 217da36cadfSJeremy Kerr extern void fsi_slave_release_range(struct fsi_slave *slave, 218da36cadfSJeremy Kerr uint32_t addr, uint32_t size) 219da36cadfSJeremy Kerr { 220da36cadfSJeremy Kerr } 221da36cadfSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_slave_release_range); 222014c2abcSJeremy Kerr 223f7ade2a6SJeremy Kerr static int fsi_slave_scan(struct fsi_slave *slave) 224f7ade2a6SJeremy Kerr { 225f7ade2a6SJeremy Kerr uint32_t engine_addr; 226f7ade2a6SJeremy Kerr uint32_t conf; 227f7ade2a6SJeremy Kerr int rc, i; 228f7ade2a6SJeremy Kerr 229f7ade2a6SJeremy Kerr /* 230f7ade2a6SJeremy Kerr * scan engines 231f7ade2a6SJeremy Kerr * 232f7ade2a6SJeremy Kerr * We keep the peek mode and slave engines for the core; so start 233f7ade2a6SJeremy Kerr * at the third slot in the configuration table. We also need to 234f7ade2a6SJeremy Kerr * skip the chip ID entry at the start of the address space. 235f7ade2a6SJeremy Kerr */ 236f7ade2a6SJeremy Kerr engine_addr = engine_page_size * 3; 237f7ade2a6SJeremy Kerr for (i = 2; i < engine_page_size / sizeof(uint32_t); i++) { 238f7ade2a6SJeremy Kerr uint8_t slots, version, type, crc; 239f7ade2a6SJeremy Kerr struct fsi_device *dev; 240f7ade2a6SJeremy Kerr 241f7ade2a6SJeremy Kerr rc = fsi_slave_read(slave, (i + 1) * sizeof(conf), 242f7ade2a6SJeremy Kerr &conf, sizeof(conf)); 243f7ade2a6SJeremy Kerr if (rc) { 244f7ade2a6SJeremy Kerr dev_warn(&slave->dev, 245f7ade2a6SJeremy Kerr "error reading slave registers\n"); 246f7ade2a6SJeremy Kerr return -1; 247f7ade2a6SJeremy Kerr } 248f7ade2a6SJeremy Kerr conf = be32_to_cpu(conf); 249f7ade2a6SJeremy Kerr 250f7ade2a6SJeremy Kerr crc = crc4(0, conf, 32); 251f7ade2a6SJeremy Kerr if (crc) { 252f7ade2a6SJeremy Kerr dev_warn(&slave->dev, 253f7ade2a6SJeremy Kerr "crc error in slave register at 0x%04x\n", 254f7ade2a6SJeremy Kerr i); 255f7ade2a6SJeremy Kerr return -1; 256f7ade2a6SJeremy Kerr } 257f7ade2a6SJeremy Kerr 258f7ade2a6SJeremy Kerr slots = (conf & FSI_SLAVE_CONF_SLOTS_MASK) 259f7ade2a6SJeremy Kerr >> FSI_SLAVE_CONF_SLOTS_SHIFT; 260f7ade2a6SJeremy Kerr version = (conf & FSI_SLAVE_CONF_VERSION_MASK) 261f7ade2a6SJeremy Kerr >> FSI_SLAVE_CONF_VERSION_SHIFT; 262f7ade2a6SJeremy Kerr type = (conf & FSI_SLAVE_CONF_TYPE_MASK) 263f7ade2a6SJeremy Kerr >> FSI_SLAVE_CONF_TYPE_SHIFT; 264f7ade2a6SJeremy Kerr 265f7ade2a6SJeremy Kerr /* 266f7ade2a6SJeremy Kerr * Unused address areas are marked by a zero type value; this 267f7ade2a6SJeremy Kerr * skips the defined address areas 268f7ade2a6SJeremy Kerr */ 269f7ade2a6SJeremy Kerr if (type != 0 && slots != 0) { 270f7ade2a6SJeremy Kerr 271f7ade2a6SJeremy Kerr /* create device */ 272f7ade2a6SJeremy Kerr dev = fsi_create_device(slave); 273f7ade2a6SJeremy Kerr if (!dev) 274f7ade2a6SJeremy Kerr return -ENOMEM; 275f7ade2a6SJeremy Kerr 276f7ade2a6SJeremy Kerr dev->slave = slave; 277f7ade2a6SJeremy Kerr dev->engine_type = type; 278f7ade2a6SJeremy Kerr dev->version = version; 279f7ade2a6SJeremy Kerr dev->unit = i; 280f7ade2a6SJeremy Kerr dev->addr = engine_addr; 281f7ade2a6SJeremy Kerr dev->size = slots * engine_page_size; 282f7ade2a6SJeremy Kerr 283f7ade2a6SJeremy Kerr dev_dbg(&slave->dev, 284f7ade2a6SJeremy Kerr "engine[%i]: type %x, version %x, addr %x size %x\n", 285f7ade2a6SJeremy Kerr dev->unit, dev->engine_type, version, 286f7ade2a6SJeremy Kerr dev->addr, dev->size); 287f7ade2a6SJeremy Kerr 288f7ade2a6SJeremy Kerr dev_set_name(&dev->dev, "%02x:%02x:%02x:%02x", 289f7ade2a6SJeremy Kerr slave->master->idx, slave->link, 290f7ade2a6SJeremy Kerr slave->id, i - 2); 291f7ade2a6SJeremy Kerr 292f7ade2a6SJeremy Kerr rc = device_register(&dev->dev); 293f7ade2a6SJeremy Kerr if (rc) { 294f7ade2a6SJeremy Kerr dev_warn(&slave->dev, "add failed: %d\n", rc); 295f7ade2a6SJeremy Kerr put_device(&dev->dev); 296f7ade2a6SJeremy Kerr } 297f7ade2a6SJeremy Kerr } 298f7ade2a6SJeremy Kerr 299f7ade2a6SJeremy Kerr engine_addr += slots * engine_page_size; 300f7ade2a6SJeremy Kerr 301f7ade2a6SJeremy Kerr if (!(conf & FSI_SLAVE_CONF_NEXT_MASK)) 302f7ade2a6SJeremy Kerr break; 303f7ade2a6SJeremy Kerr } 304f7ade2a6SJeremy Kerr 305f7ade2a6SJeremy Kerr return 0; 306f7ade2a6SJeremy Kerr } 307f7ade2a6SJeremy Kerr 308125739cbSJeremy Kerr static ssize_t fsi_slave_sysfs_raw_read(struct file *file, 309125739cbSJeremy Kerr struct kobject *kobj, struct bin_attribute *attr, char *buf, 310125739cbSJeremy Kerr loff_t off, size_t count) 311125739cbSJeremy Kerr { 312125739cbSJeremy Kerr struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj)); 313125739cbSJeremy Kerr size_t total_len, read_len; 314125739cbSJeremy Kerr int rc; 315125739cbSJeremy Kerr 316125739cbSJeremy Kerr if (off < 0) 317125739cbSJeremy Kerr return -EINVAL; 318125739cbSJeremy Kerr 319125739cbSJeremy Kerr if (off > 0xffffffff || count > 0xffffffff || off + count > 0xffffffff) 320125739cbSJeremy Kerr return -EINVAL; 321125739cbSJeremy Kerr 322125739cbSJeremy Kerr for (total_len = 0; total_len < count; total_len += read_len) { 323125739cbSJeremy Kerr read_len = min_t(size_t, count, 4); 324125739cbSJeremy Kerr read_len -= off & 0x3; 325125739cbSJeremy Kerr 326125739cbSJeremy Kerr rc = fsi_slave_read(slave, off, buf + total_len, read_len); 327125739cbSJeremy Kerr if (rc) 328125739cbSJeremy Kerr return rc; 329125739cbSJeremy Kerr 330125739cbSJeremy Kerr off += read_len; 331125739cbSJeremy Kerr } 332125739cbSJeremy Kerr 333125739cbSJeremy Kerr return count; 334125739cbSJeremy Kerr } 335125739cbSJeremy Kerr 336125739cbSJeremy Kerr static ssize_t fsi_slave_sysfs_raw_write(struct file *file, 337125739cbSJeremy Kerr struct kobject *kobj, struct bin_attribute *attr, 338125739cbSJeremy Kerr char *buf, loff_t off, size_t count) 339125739cbSJeremy Kerr { 340125739cbSJeremy Kerr struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj)); 341125739cbSJeremy Kerr size_t total_len, write_len; 342125739cbSJeremy Kerr int rc; 343125739cbSJeremy Kerr 344125739cbSJeremy Kerr if (off < 0) 345125739cbSJeremy Kerr return -EINVAL; 346125739cbSJeremy Kerr 347125739cbSJeremy Kerr if (off > 0xffffffff || count > 0xffffffff || off + count > 0xffffffff) 348125739cbSJeremy Kerr return -EINVAL; 349125739cbSJeremy Kerr 350125739cbSJeremy Kerr for (total_len = 0; total_len < count; total_len += write_len) { 351125739cbSJeremy Kerr write_len = min_t(size_t, count, 4); 352125739cbSJeremy Kerr write_len -= off & 0x3; 353125739cbSJeremy Kerr 354125739cbSJeremy Kerr rc = fsi_slave_write(slave, off, buf + total_len, write_len); 355125739cbSJeremy Kerr if (rc) 356125739cbSJeremy Kerr return rc; 357125739cbSJeremy Kerr 358125739cbSJeremy Kerr off += write_len; 359125739cbSJeremy Kerr } 360125739cbSJeremy Kerr 361125739cbSJeremy Kerr return count; 362125739cbSJeremy Kerr } 363125739cbSJeremy Kerr 364125739cbSJeremy Kerr static struct bin_attribute fsi_slave_raw_attr = { 365125739cbSJeremy Kerr .attr = { 366125739cbSJeremy Kerr .name = "raw", 367125739cbSJeremy Kerr .mode = 0600, 368125739cbSJeremy Kerr }, 369125739cbSJeremy Kerr .size = 0, 370125739cbSJeremy Kerr .read = fsi_slave_sysfs_raw_read, 371125739cbSJeremy Kerr .write = fsi_slave_sysfs_raw_write, 372125739cbSJeremy Kerr }; 373125739cbSJeremy Kerr 374125739cbSJeremy Kerr static ssize_t fsi_slave_sysfs_term_write(struct file *file, 375125739cbSJeremy Kerr struct kobject *kobj, struct bin_attribute *attr, 376125739cbSJeremy Kerr char *buf, loff_t off, size_t count) 377125739cbSJeremy Kerr { 378125739cbSJeremy Kerr struct fsi_slave *slave = to_fsi_slave(kobj_to_dev(kobj)); 379125739cbSJeremy Kerr struct fsi_master *master = slave->master; 380125739cbSJeremy Kerr 381125739cbSJeremy Kerr if (!master->term) 382125739cbSJeremy Kerr return -ENODEV; 383125739cbSJeremy Kerr 384125739cbSJeremy Kerr master->term(master, slave->link, slave->id); 385125739cbSJeremy Kerr return count; 386125739cbSJeremy Kerr } 387125739cbSJeremy Kerr 388125739cbSJeremy Kerr static struct bin_attribute fsi_slave_term_attr = { 389125739cbSJeremy Kerr .attr = { 390125739cbSJeremy Kerr .name = "term", 391125739cbSJeremy Kerr .mode = 0200, 392125739cbSJeremy Kerr }, 393125739cbSJeremy Kerr .size = 0, 394125739cbSJeremy Kerr .write = fsi_slave_sysfs_term_write, 395125739cbSJeremy Kerr }; 396125739cbSJeremy Kerr 3972b37c3e2SChristopher Bostic /* Encode slave local bus echo delay */ 3982b37c3e2SChristopher Bostic static inline uint32_t fsi_smode_echodly(int x) 3992b37c3e2SChristopher Bostic { 4002b37c3e2SChristopher Bostic return (x & FSI_SMODE_ED_MASK) << FSI_SMODE_ED_SHIFT; 4012b37c3e2SChristopher Bostic } 4022b37c3e2SChristopher Bostic 4032b37c3e2SChristopher Bostic /* Encode slave local bus send delay */ 4042b37c3e2SChristopher Bostic static inline uint32_t fsi_smode_senddly(int x) 4052b37c3e2SChristopher Bostic { 4062b37c3e2SChristopher Bostic return (x & FSI_SMODE_SD_MASK) << FSI_SMODE_SD_SHIFT; 4072b37c3e2SChristopher Bostic } 4082b37c3e2SChristopher Bostic 4092b37c3e2SChristopher Bostic /* Encode slave local bus clock rate ratio */ 4102b37c3e2SChristopher Bostic static inline uint32_t fsi_smode_lbcrr(int x) 4112b37c3e2SChristopher Bostic { 4122b37c3e2SChristopher Bostic return (x & FSI_SMODE_LBCRR_MASK) << FSI_SMODE_LBCRR_SHIFT; 4132b37c3e2SChristopher Bostic } 4142b37c3e2SChristopher Bostic 4152b37c3e2SChristopher Bostic /* Encode slave ID */ 4162b37c3e2SChristopher Bostic static inline uint32_t fsi_smode_sid(int x) 4172b37c3e2SChristopher Bostic { 4182b37c3e2SChristopher Bostic return (x & FSI_SMODE_SID_MASK) << FSI_SMODE_SID_SHIFT; 4192b37c3e2SChristopher Bostic } 4202b37c3e2SChristopher Bostic 4212b37c3e2SChristopher Bostic static const uint32_t fsi_slave_smode(int id) 4222b37c3e2SChristopher Bostic { 4232b37c3e2SChristopher Bostic return FSI_SMODE_WSC | FSI_SMODE_ECRC 4242b37c3e2SChristopher Bostic | fsi_smode_sid(id) 4252b37c3e2SChristopher Bostic | fsi_smode_echodly(0xf) | fsi_smode_senddly(0xf) 4262b37c3e2SChristopher Bostic | fsi_smode_lbcrr(0x8); 4272b37c3e2SChristopher Bostic } 4282b37c3e2SChristopher Bostic 4292b37c3e2SChristopher Bostic static int fsi_slave_set_smode(struct fsi_master *master, int link, int id) 4302b37c3e2SChristopher Bostic { 4312b37c3e2SChristopher Bostic uint32_t smode; 4322b37c3e2SChristopher Bostic 4332b37c3e2SChristopher Bostic /* set our smode register with the slave ID field to 0; this enables 4342b37c3e2SChristopher Bostic * extended slave addressing 4352b37c3e2SChristopher Bostic */ 4362b37c3e2SChristopher Bostic smode = fsi_slave_smode(id); 4372b37c3e2SChristopher Bostic smode = cpu_to_be32(smode); 4382b37c3e2SChristopher Bostic 4392b37c3e2SChristopher Bostic return fsi_master_write(master, link, id, FSI_SLAVE_BASE + FSI_SMODE, 4402b37c3e2SChristopher Bostic &smode, sizeof(smode)); 4412b37c3e2SChristopher Bostic } 4422b37c3e2SChristopher Bostic 4432b545cd8SJeremy Kerr static void fsi_slave_release(struct device *dev) 4442b545cd8SJeremy Kerr { 4452b545cd8SJeremy Kerr struct fsi_slave *slave = to_fsi_slave(dev); 4462b545cd8SJeremy Kerr 4472b545cd8SJeremy Kerr kfree(slave); 4482b545cd8SJeremy Kerr } 4492b545cd8SJeremy Kerr 450414c1026SJeremy Kerr static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id) 451414c1026SJeremy Kerr { 4522b545cd8SJeremy Kerr struct fsi_slave *slave; 4532b545cd8SJeremy Kerr uint32_t chip_id; 4542b545cd8SJeremy Kerr uint8_t crc; 4552b545cd8SJeremy Kerr int rc; 456414c1026SJeremy Kerr 4572b545cd8SJeremy Kerr /* Currently, we only support single slaves on a link, and use the 4582b545cd8SJeremy Kerr * full 23-bit address range 4592b545cd8SJeremy Kerr */ 4602b545cd8SJeremy Kerr if (id != 0) 4612b545cd8SJeremy Kerr return -EINVAL; 4622b545cd8SJeremy Kerr 4632b545cd8SJeremy Kerr rc = fsi_master_read(master, link, id, 0, &chip_id, sizeof(chip_id)); 4642b545cd8SJeremy Kerr if (rc) { 4652b545cd8SJeremy Kerr dev_dbg(&master->dev, "can't read slave %02x:%02x %d\n", 4662b545cd8SJeremy Kerr link, id, rc); 467414c1026SJeremy Kerr return -ENODEV; 468414c1026SJeremy Kerr } 4692b545cd8SJeremy Kerr chip_id = be32_to_cpu(chip_id); 4702b545cd8SJeremy Kerr 4712b545cd8SJeremy Kerr crc = crc4(0, chip_id, 32); 4722b545cd8SJeremy Kerr if (crc) { 4732b545cd8SJeremy Kerr dev_warn(&master->dev, "slave %02x:%02x invalid chip id CRC!\n", 4742b545cd8SJeremy Kerr link, id); 4752b545cd8SJeremy Kerr return -EIO; 4762b545cd8SJeremy Kerr } 4772b545cd8SJeremy Kerr 4782b545cd8SJeremy Kerr dev_info(&master->dev, "fsi: found chip %08x at %02x:%02x:%02x\n", 4792b545cd8SJeremy Kerr chip_id, master->idx, link, id); 4802b545cd8SJeremy Kerr 4812b37c3e2SChristopher Bostic rc = fsi_slave_set_smode(master, link, id); 4822b37c3e2SChristopher Bostic if (rc) { 4832b37c3e2SChristopher Bostic dev_warn(&master->dev, 4842b37c3e2SChristopher Bostic "can't set smode on slave:%02x:%02x %d\n", 4852b37c3e2SChristopher Bostic link, id, rc); 4862b37c3e2SChristopher Bostic return -ENODEV; 4872b37c3e2SChristopher Bostic } 4882b37c3e2SChristopher Bostic 4892b545cd8SJeremy Kerr /* We can communicate with a slave; create the slave device and 4902b545cd8SJeremy Kerr * register. 4912b545cd8SJeremy Kerr */ 4922b545cd8SJeremy Kerr slave = kzalloc(sizeof(*slave), GFP_KERNEL); 4932b545cd8SJeremy Kerr if (!slave) 4942b545cd8SJeremy Kerr return -ENOMEM; 4952b545cd8SJeremy Kerr 4962b545cd8SJeremy Kerr slave->master = master; 4972b545cd8SJeremy Kerr slave->dev.parent = &master->dev; 4982b545cd8SJeremy Kerr slave->dev.release = fsi_slave_release; 4992b545cd8SJeremy Kerr slave->link = link; 5002b545cd8SJeremy Kerr slave->id = id; 5012b545cd8SJeremy Kerr slave->size = FSI_SLAVE_SIZE_23b; 5022b545cd8SJeremy Kerr 5032b545cd8SJeremy Kerr dev_set_name(&slave->dev, "slave@%02x:%02x", link, id); 5042b545cd8SJeremy Kerr rc = device_register(&slave->dev); 5052b545cd8SJeremy Kerr if (rc < 0) { 5062b545cd8SJeremy Kerr dev_warn(&master->dev, "failed to create slave device: %d\n", 5072b545cd8SJeremy Kerr rc); 5082b545cd8SJeremy Kerr put_device(&slave->dev); 5092b545cd8SJeremy Kerr return rc; 5102b545cd8SJeremy Kerr } 5112b545cd8SJeremy Kerr 512125739cbSJeremy Kerr rc = device_create_bin_file(&slave->dev, &fsi_slave_raw_attr); 513125739cbSJeremy Kerr if (rc) 514125739cbSJeremy Kerr dev_warn(&slave->dev, "failed to create raw attr: %d\n", rc); 515125739cbSJeremy Kerr 516125739cbSJeremy Kerr rc = device_create_bin_file(&slave->dev, &fsi_slave_term_attr); 517125739cbSJeremy Kerr if (rc) 518125739cbSJeremy Kerr dev_warn(&slave->dev, "failed to create term attr: %d\n", rc); 519125739cbSJeremy Kerr 520f7ade2a6SJeremy Kerr rc = fsi_slave_scan(slave); 521f7ade2a6SJeremy Kerr if (rc) 522f7ade2a6SJeremy Kerr dev_dbg(&master->dev, "failed during slave scan with: %d\n", 523f7ade2a6SJeremy Kerr rc); 5242b545cd8SJeremy Kerr 5252b545cd8SJeremy Kerr return rc; 5262b545cd8SJeremy Kerr } 527414c1026SJeremy Kerr 52809aecfabSJeremy Kerr /* FSI master support */ 529014c2abcSJeremy Kerr static int fsi_check_access(uint32_t addr, size_t size) 530014c2abcSJeremy Kerr { 531014c2abcSJeremy Kerr if (size != 1 && size != 2 && size != 4) 532014c2abcSJeremy Kerr return -EINVAL; 533014c2abcSJeremy Kerr 534014c2abcSJeremy Kerr if ((addr & 0x3) != (size & 0x3)) 535014c2abcSJeremy Kerr return -EINVAL; 536014c2abcSJeremy Kerr 537014c2abcSJeremy Kerr return 0; 538014c2abcSJeremy Kerr } 539014c2abcSJeremy Kerr 540014c2abcSJeremy Kerr static int fsi_master_read(struct fsi_master *master, int link, 541014c2abcSJeremy Kerr uint8_t slave_id, uint32_t addr, void *val, size_t size) 542014c2abcSJeremy Kerr { 543014c2abcSJeremy Kerr int rc; 544014c2abcSJeremy Kerr 545014c2abcSJeremy Kerr rc = fsi_check_access(addr, size); 546014c2abcSJeremy Kerr if (rc) 547014c2abcSJeremy Kerr return rc; 548014c2abcSJeremy Kerr 549014c2abcSJeremy Kerr return master->read(master, link, slave_id, addr, val, size); 550014c2abcSJeremy Kerr } 551014c2abcSJeremy Kerr 552014c2abcSJeremy Kerr static int fsi_master_write(struct fsi_master *master, int link, 553014c2abcSJeremy Kerr uint8_t slave_id, uint32_t addr, const void *val, size_t size) 554014c2abcSJeremy Kerr { 555014c2abcSJeremy Kerr int rc; 556014c2abcSJeremy Kerr 557014c2abcSJeremy Kerr rc = fsi_check_access(addr, size); 558014c2abcSJeremy Kerr if (rc) 559014c2abcSJeremy Kerr return rc; 560014c2abcSJeremy Kerr 561014c2abcSJeremy Kerr return master->write(master, link, slave_id, addr, val, size); 562014c2abcSJeremy Kerr } 563014c2abcSJeremy Kerr 56426095282SChristopher Bostic static int fsi_master_link_enable(struct fsi_master *master, int link) 56526095282SChristopher Bostic { 56626095282SChristopher Bostic if (master->link_enable) 56726095282SChristopher Bostic return master->link_enable(master, link); 56826095282SChristopher Bostic 56926095282SChristopher Bostic return 0; 57026095282SChristopher Bostic } 57126095282SChristopher Bostic 57226095282SChristopher Bostic /* 57326095282SChristopher Bostic * Issue a break command on this link 57426095282SChristopher Bostic */ 57526095282SChristopher Bostic static int fsi_master_break(struct fsi_master *master, int link) 57626095282SChristopher Bostic { 57726095282SChristopher Bostic if (master->send_break) 57826095282SChristopher Bostic return master->send_break(master, link); 57926095282SChristopher Bostic 58026095282SChristopher Bostic return 0; 58126095282SChristopher Bostic } 58226095282SChristopher Bostic 583414c1026SJeremy Kerr static int fsi_master_scan(struct fsi_master *master) 584414c1026SJeremy Kerr { 58526095282SChristopher Bostic int link, rc; 586414c1026SJeremy Kerr 58726095282SChristopher Bostic for (link = 0; link < master->n_links; link++) { 58826095282SChristopher Bostic rc = fsi_master_link_enable(master, link); 58926095282SChristopher Bostic if (rc) { 59026095282SChristopher Bostic dev_dbg(&master->dev, 59126095282SChristopher Bostic "enable link %d failed: %d\n", link, rc); 59226095282SChristopher Bostic continue; 59326095282SChristopher Bostic } 59426095282SChristopher Bostic rc = fsi_master_break(master, link); 59526095282SChristopher Bostic if (rc) { 59626095282SChristopher Bostic dev_dbg(&master->dev, 59726095282SChristopher Bostic "break to link %d failed: %d\n", link, rc); 59826095282SChristopher Bostic continue; 59926095282SChristopher Bostic } 60026095282SChristopher Bostic 601414c1026SJeremy Kerr fsi_slave_init(master, link, 0); 60226095282SChristopher Bostic } 603414c1026SJeremy Kerr 604414c1026SJeremy Kerr return 0; 605414c1026SJeremy Kerr } 606414c1026SJeremy Kerr 607cd0fdb5cSChristopher Bostic static int fsi_slave_remove_device(struct device *dev, void *arg) 608cd0fdb5cSChristopher Bostic { 609cd0fdb5cSChristopher Bostic device_unregister(dev); 610cd0fdb5cSChristopher Bostic return 0; 611cd0fdb5cSChristopher Bostic } 612cd0fdb5cSChristopher Bostic 613cd0fdb5cSChristopher Bostic static int fsi_master_remove_slave(struct device *dev, void *arg) 614cd0fdb5cSChristopher Bostic { 615cd0fdb5cSChristopher Bostic device_for_each_child(dev, NULL, fsi_slave_remove_device); 616cd0fdb5cSChristopher Bostic device_unregister(dev); 617cd0fdb5cSChristopher Bostic return 0; 618cd0fdb5cSChristopher Bostic } 619cd0fdb5cSChristopher Bostic 620cd0fdb5cSChristopher Bostic static void fsi_master_unscan(struct fsi_master *master) 621cd0fdb5cSChristopher Bostic { 622cd0fdb5cSChristopher Bostic device_for_each_child(&master->dev, NULL, fsi_master_remove_slave); 623cd0fdb5cSChristopher Bostic } 624cd0fdb5cSChristopher Bostic 625cd0fdb5cSChristopher Bostic static ssize_t master_rescan_store(struct device *dev, 626cd0fdb5cSChristopher Bostic struct device_attribute *attr, const char *buf, size_t count) 627cd0fdb5cSChristopher Bostic { 628cd0fdb5cSChristopher Bostic struct fsi_master *master = to_fsi_master(dev); 629cd0fdb5cSChristopher Bostic int rc; 630cd0fdb5cSChristopher Bostic 631cd0fdb5cSChristopher Bostic fsi_master_unscan(master); 632cd0fdb5cSChristopher Bostic rc = fsi_master_scan(master); 633cd0fdb5cSChristopher Bostic if (rc < 0) 634cd0fdb5cSChristopher Bostic return rc; 635cd0fdb5cSChristopher Bostic 636cd0fdb5cSChristopher Bostic return count; 637cd0fdb5cSChristopher Bostic } 638cd0fdb5cSChristopher Bostic 639cd0fdb5cSChristopher Bostic static DEVICE_ATTR(rescan, 0200, NULL, master_rescan_store); 640cd0fdb5cSChristopher Bostic 641125739cbSJeremy Kerr static ssize_t master_break_store(struct device *dev, 642125739cbSJeremy Kerr struct device_attribute *attr, const char *buf, size_t count) 643125739cbSJeremy Kerr { 644125739cbSJeremy Kerr struct fsi_master *master = to_fsi_master(dev); 645125739cbSJeremy Kerr 646125739cbSJeremy Kerr fsi_master_break(master, 0); 647125739cbSJeremy Kerr 648125739cbSJeremy Kerr return count; 649125739cbSJeremy Kerr } 650125739cbSJeremy Kerr 651125739cbSJeremy Kerr static DEVICE_ATTR(break, 0200, NULL, master_break_store); 652125739cbSJeremy Kerr 65309aecfabSJeremy Kerr int fsi_master_register(struct fsi_master *master) 65409aecfabSJeremy Kerr { 65509aecfabSJeremy Kerr int rc; 65609aecfabSJeremy Kerr 65709aecfabSJeremy Kerr if (!master) 65809aecfabSJeremy Kerr return -EINVAL; 65909aecfabSJeremy Kerr 66009aecfabSJeremy Kerr master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL); 66109aecfabSJeremy Kerr dev_set_name(&master->dev, "fsi%d", master->idx); 66209aecfabSJeremy Kerr 66309aecfabSJeremy Kerr rc = device_register(&master->dev); 664414c1026SJeremy Kerr if (rc) { 66509aecfabSJeremy Kerr ida_simple_remove(&master_ida, master->idx); 66609aecfabSJeremy Kerr return rc; 66709aecfabSJeremy Kerr } 668414c1026SJeremy Kerr 669cd0fdb5cSChristopher Bostic rc = device_create_file(&master->dev, &dev_attr_rescan); 670cd0fdb5cSChristopher Bostic if (rc) { 671cd0fdb5cSChristopher Bostic device_unregister(&master->dev); 672cd0fdb5cSChristopher Bostic ida_simple_remove(&master_ida, master->idx); 673cd0fdb5cSChristopher Bostic return rc; 674cd0fdb5cSChristopher Bostic } 675cd0fdb5cSChristopher Bostic 676125739cbSJeremy Kerr rc = device_create_file(&master->dev, &dev_attr_break); 677125739cbSJeremy Kerr if (rc) { 678125739cbSJeremy Kerr device_unregister(&master->dev); 679125739cbSJeremy Kerr ida_simple_remove(&master_ida, master->idx); 680125739cbSJeremy Kerr return rc; 681125739cbSJeremy Kerr } 682125739cbSJeremy Kerr 683414c1026SJeremy Kerr fsi_master_scan(master); 684cd0fdb5cSChristopher Bostic 685414c1026SJeremy Kerr return 0; 686414c1026SJeremy Kerr } 68709aecfabSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_master_register); 68809aecfabSJeremy Kerr 68909aecfabSJeremy Kerr void fsi_master_unregister(struct fsi_master *master) 69009aecfabSJeremy Kerr { 69109aecfabSJeremy Kerr if (master->idx >= 0) { 69209aecfabSJeremy Kerr ida_simple_remove(&master_ida, master->idx); 69309aecfabSJeremy Kerr master->idx = -1; 69409aecfabSJeremy Kerr } 69509aecfabSJeremy Kerr 696cd0fdb5cSChristopher Bostic fsi_master_unscan(master); 69709aecfabSJeremy Kerr device_unregister(&master->dev); 69809aecfabSJeremy Kerr } 69909aecfabSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_master_unregister); 70009aecfabSJeremy Kerr 7010508ad1fSJeremy Kerr /* FSI core & Linux bus type definitions */ 7020508ad1fSJeremy Kerr 703dd37eed7SJeremy Kerr static int fsi_bus_match(struct device *dev, struct device_driver *drv) 704dd37eed7SJeremy Kerr { 705dd37eed7SJeremy Kerr struct fsi_device *fsi_dev = to_fsi_dev(dev); 706dd37eed7SJeremy Kerr struct fsi_driver *fsi_drv = to_fsi_drv(drv); 707dd37eed7SJeremy Kerr const struct fsi_device_id *id; 708dd37eed7SJeremy Kerr 709dd37eed7SJeremy Kerr if (!fsi_drv->id_table) 710dd37eed7SJeremy Kerr return 0; 711dd37eed7SJeremy Kerr 712dd37eed7SJeremy Kerr for (id = fsi_drv->id_table; id->engine_type; id++) { 713dd37eed7SJeremy Kerr if (id->engine_type != fsi_dev->engine_type) 714dd37eed7SJeremy Kerr continue; 715dd37eed7SJeremy Kerr if (id->version == FSI_VERSION_ANY || 716dd37eed7SJeremy Kerr id->version == fsi_dev->version) 717dd37eed7SJeremy Kerr return 1; 718dd37eed7SJeremy Kerr } 719dd37eed7SJeremy Kerr 720dd37eed7SJeremy Kerr return 0; 721dd37eed7SJeremy Kerr } 722dd37eed7SJeremy Kerr 723356d8009SChristopher Bostic int fsi_driver_register(struct fsi_driver *fsi_drv) 724356d8009SChristopher Bostic { 725356d8009SChristopher Bostic if (!fsi_drv) 726356d8009SChristopher Bostic return -EINVAL; 727356d8009SChristopher Bostic if (!fsi_drv->id_table) 728356d8009SChristopher Bostic return -EINVAL; 729356d8009SChristopher Bostic 730356d8009SChristopher Bostic return driver_register(&fsi_drv->drv); 731356d8009SChristopher Bostic } 732356d8009SChristopher Bostic EXPORT_SYMBOL_GPL(fsi_driver_register); 733356d8009SChristopher Bostic 734356d8009SChristopher Bostic void fsi_driver_unregister(struct fsi_driver *fsi_drv) 735356d8009SChristopher Bostic { 736356d8009SChristopher Bostic driver_unregister(&fsi_drv->drv); 737356d8009SChristopher Bostic } 738356d8009SChristopher Bostic EXPORT_SYMBOL_GPL(fsi_driver_unregister); 739356d8009SChristopher Bostic 7400508ad1fSJeremy Kerr struct bus_type fsi_bus_type = { 7410508ad1fSJeremy Kerr .name = "fsi", 742dd37eed7SJeremy Kerr .match = fsi_bus_match, 7430508ad1fSJeremy Kerr }; 7440508ad1fSJeremy Kerr EXPORT_SYMBOL_GPL(fsi_bus_type); 7450508ad1fSJeremy Kerr 7460508ad1fSJeremy Kerr static int fsi_init(void) 7470508ad1fSJeremy Kerr { 7480508ad1fSJeremy Kerr return bus_register(&fsi_bus_type); 7490508ad1fSJeremy Kerr } 7500508ad1fSJeremy Kerr 7510508ad1fSJeremy Kerr static void fsi_exit(void) 7520508ad1fSJeremy Kerr { 7530508ad1fSJeremy Kerr bus_unregister(&fsi_bus_type); 7540508ad1fSJeremy Kerr } 7550508ad1fSJeremy Kerr 7560508ad1fSJeremy Kerr module_init(fsi_init); 7570508ad1fSJeremy Kerr module_exit(fsi_exit); 758