Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jens Taprogge | 1739 | 68.38% | 15 | 48.39% |
Samuel Iglesias Gonsálvez | 730 | 28.71% | 9 | 29.03% |
Greg Kroah-Hartman | 55 | 2.16% | 1 | 3.23% |
Federico Vaga | 11 | 0.43% | 1 | 3.23% |
Stephen Hemminger | 2 | 0.08% | 1 | 3.23% |
SF Markus Elfring | 2 | 0.08% | 1 | 3.23% |
Thomas Gleixner | 2 | 0.08% | 1 | 3.23% |
Uwe Kleine-König | 1 | 0.04% | 1 | 3.23% |
Johan Meiring | 1 | 0.04% | 1 | 3.23% |
Total | 2543 | 31 |
// SPDX-License-Identifier: GPL-2.0-only /* * Industry-pack bus support functions. * * Copyright (C) 2011-2012 CERN (www.cern.ch) * Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com> */ #include <linux/module.h> #include <linux/slab.h> #include <linux/idr.h> #include <linux/io.h> #include <linux/ipack.h> #define to_ipack_dev(device) container_of(device, struct ipack_device, dev) #define to_ipack_driver(drv) container_of(drv, struct ipack_driver, driver) static DEFINE_IDA(ipack_ida); static void ipack_device_release(struct device *dev) { struct ipack_device *device = to_ipack_dev(dev); kfree(device->id); device->release(device); } static inline const struct ipack_device_id * ipack_match_one_device(const struct ipack_device_id *id, const struct ipack_device *device) { if ((id->format == IPACK_ANY_FORMAT || id->format == device->id_format) && (id->vendor == IPACK_ANY_ID || id->vendor == device->id_vendor) && (id->device == IPACK_ANY_ID || id->device == device->id_device)) return id; return NULL; } static const struct ipack_device_id * ipack_match_id(const struct ipack_device_id *ids, struct ipack_device *idev) { if (ids) { while (ids->vendor || ids->device) { if (ipack_match_one_device(ids, idev)) return ids; ids++; } } return NULL; } static int ipack_bus_match(struct device *dev, struct device_driver *drv) { struct ipack_device *idev = to_ipack_dev(dev); struct ipack_driver *idrv = to_ipack_driver(drv); const struct ipack_device_id *found_id; found_id = ipack_match_id(idrv->id_table, idev); return found_id ? 1 : 0; } static int ipack_bus_probe(struct device *device) { struct ipack_device *dev = to_ipack_dev(device); struct ipack_driver *drv = to_ipack_driver(device->driver); if (!drv->ops->probe) return -EINVAL; return drv->ops->probe(dev); } static int ipack_bus_remove(struct device *device) { struct ipack_device *dev = to_ipack_dev(device); struct ipack_driver *drv = to_ipack_driver(device->driver); if (!drv->ops->remove) return -EINVAL; drv->ops->remove(dev); return 0; } static int ipack_uevent(struct device *dev, struct kobj_uevent_env *env) { struct ipack_device *idev; if (!dev) return -ENODEV; idev = to_ipack_dev(dev); if (add_uevent_var(env, "MODALIAS=ipack:f%02Xv%08Xd%08X", idev->id_format, idev->id_vendor, idev->id_device)) return -ENOMEM; return 0; } #define ipack_device_attr(field, format_string) \ static ssize_t \ field##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct ipack_device *idev = to_ipack_dev(dev); \ return sprintf(buf, format_string, idev->field); \ } static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { unsigned int i, c, l, s; struct ipack_device *idev = to_ipack_dev(dev); switch (idev->id_format) { case IPACK_ID_VERSION_1: l = 0x7; s = 1; break; case IPACK_ID_VERSION_2: l = 0xf; s = 2; break; default: return -EIO; } c = 0; for (i = 0; i < idev->id_avail; i++) { if (i > 0) { if ((i & l) == 0) buf[c++] = '\n'; else if ((i & s) == 0) buf[c++] = ' '; } sprintf(&buf[c], "%02x", idev->id[i]); c += 2; } buf[c++] = '\n'; return c; } static ssize_t id_vendor_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ipack_device *idev = to_ipack_dev(dev); switch (idev->id_format) { case IPACK_ID_VERSION_1: return sprintf(buf, "0x%02x\n", idev->id_vendor); case IPACK_ID_VERSION_2: return sprintf(buf, "0x%06x\n", idev->id_vendor); default: return -EIO; } } static ssize_t id_device_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ipack_device *idev = to_ipack_dev(dev); switch (idev->id_format) { case IPACK_ID_VERSION_1: return sprintf(buf, "0x%02x\n", idev->id_device); case IPACK_ID_VERSION_2: return sprintf(buf, "0x%04x\n", idev->id_device); default: return -EIO; } } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ipack_device *idev = to_ipack_dev(dev); return sprintf(buf, "ipac:f%02Xv%08Xd%08X", idev->id_format, idev->id_vendor, idev->id_device); } ipack_device_attr(id_format, "0x%hhx\n"); static DEVICE_ATTR_RO(id); static DEVICE_ATTR_RO(id_device); static DEVICE_ATTR_RO(id_format); static DEVICE_ATTR_RO(id_vendor); static DEVICE_ATTR_RO(modalias); static struct attribute *ipack_attrs[] = { &dev_attr_id.attr, &dev_attr_id_device.attr, &dev_attr_id_format.attr, &dev_attr_id_vendor.attr, &dev_attr_modalias.attr, NULL, }; ATTRIBUTE_GROUPS(ipack); static struct bus_type ipack_bus_type = { .name = "ipack", .probe = ipack_bus_probe, .match = ipack_bus_match, .remove = ipack_bus_remove, .dev_groups = ipack_groups, .uevent = ipack_uevent, }; struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots, const struct ipack_bus_ops *ops, struct module *owner) { int bus_nr; struct ipack_bus_device *bus; bus = kzalloc(sizeof(*bus), GFP_KERNEL); if (!bus) return NULL; bus_nr = ida_simple_get(&ipack_ida, 0, 0, GFP_KERNEL); if (bus_nr < 0) { kfree(bus); return NULL; } bus->bus_nr = bus_nr; bus->parent = parent; bus->slots = slots; bus->ops = ops; bus->owner = owner; return bus; } EXPORT_SYMBOL_GPL(ipack_bus_register); static int ipack_unregister_bus_member(struct device *dev, void *data) { struct ipack_device *idev = to_ipack_dev(dev); struct ipack_bus_device *bus = data; if (idev->bus == bus) ipack_device_del(idev); return 1; } int ipack_bus_unregister(struct ipack_bus_device *bus) { bus_for_each_dev(&ipack_bus_type, NULL, bus, ipack_unregister_bus_member); ida_simple_remove(&ipack_ida, bus->bus_nr); kfree(bus); return 0; } EXPORT_SYMBOL_GPL(ipack_bus_unregister); int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, const char *name) { edrv->driver.owner = owner; edrv->driver.name = name; edrv->driver.bus = &ipack_bus_type; return driver_register(&edrv->driver); } EXPORT_SYMBOL_GPL(ipack_driver_register); void ipack_driver_unregister(struct ipack_driver *edrv) { driver_unregister(&edrv->driver); } EXPORT_SYMBOL_GPL(ipack_driver_unregister); static u16 ipack_crc_byte(u16 crc, u8 c) { int i; crc ^= c << 8; for (i = 0; i < 8; i++) crc = (crc << 1) ^ ((crc & 0x8000) ? 0x1021 : 0); return crc; } /* * The algorithm in lib/crc-ccitt.c does not seem to apply since it uses the * opposite bit ordering. */ static u8 ipack_calc_crc1(struct ipack_device *dev) { u8 c; u16 crc; unsigned int i; crc = 0xffff; for (i = 0; i < dev->id_avail; i++) { c = (i != 11) ? dev->id[i] : 0; crc = ipack_crc_byte(crc, c); } crc = ~crc; return crc & 0xff; } static u16 ipack_calc_crc2(struct ipack_device *dev) { u8 c; u16 crc; unsigned int i; crc = 0xffff; for (i = 0; i < dev->id_avail; i++) { c = ((i != 0x18) && (i != 0x19)) ? dev->id[i] : 0; crc = ipack_crc_byte(crc, c); } crc = ~crc; return crc; } static void ipack_parse_id1(struct ipack_device *dev) { u8 *id = dev->id; u8 crc; dev->id_vendor = id[4]; dev->id_device = id[5]; dev->speed_8mhz = 1; dev->speed_32mhz = (id[7] == 'H'); crc = ipack_calc_crc1(dev); dev->id_crc_correct = (crc == id[11]); if (!dev->id_crc_correct) { dev_warn(&dev->dev, "ID CRC invalid found 0x%x, expected 0x%x.\n", id[11], crc); } } static void ipack_parse_id2(struct ipack_device *dev) { __be16 *id = (__be16 *) dev->id; u16 flags, crc; dev->id_vendor = ((be16_to_cpu(id[3]) & 0xff) << 16) + be16_to_cpu(id[4]); dev->id_device = be16_to_cpu(id[5]); flags = be16_to_cpu(id[10]); dev->speed_8mhz = !!(flags & 2); dev->speed_32mhz = !!(flags & 4); crc = ipack_calc_crc2(dev); dev->id_crc_correct = (crc == be16_to_cpu(id[12])); if (!dev->id_crc_correct) { dev_warn(&dev->dev, "ID CRC invalid found 0x%x, expected 0x%x.\n", id[11], crc); } } static int ipack_device_read_id(struct ipack_device *dev) { u8 __iomem *idmem; int i; int ret = 0; idmem = ioremap(dev->region[IPACK_ID_SPACE].start, dev->region[IPACK_ID_SPACE].size); if (!idmem) { dev_err(&dev->dev, "error mapping memory\n"); return -ENOMEM; } /* Determine ID PROM Data Format. If we find the ids "IPAC" or "IPAH" * we are dealing with a IndustryPack format 1 device. If we detect * "VITA4 " (16 bit big endian formatted) we are dealing with a * IndustryPack format 2 device */ if ((ioread8(idmem + 1) == 'I') && (ioread8(idmem + 3) == 'P') && (ioread8(idmem + 5) == 'A') && ((ioread8(idmem + 7) == 'C') || (ioread8(idmem + 7) == 'H'))) { dev->id_format = IPACK_ID_VERSION_1; dev->id_avail = ioread8(idmem + 0x15); if ((dev->id_avail < 0x0c) || (dev->id_avail > 0x40)) { dev_warn(&dev->dev, "invalid id size"); dev->id_avail = 0x0c; } } else if ((ioread8(idmem + 0) == 'I') && (ioread8(idmem + 1) == 'V') && (ioread8(idmem + 2) == 'A') && (ioread8(idmem + 3) == 'T') && (ioread8(idmem + 4) == ' ') && (ioread8(idmem + 5) == '4')) { dev->id_format = IPACK_ID_VERSION_2; dev->id_avail = ioread16be(idmem + 0x16); if ((dev->id_avail < 0x1a) || (dev->id_avail > 0x40)) { dev_warn(&dev->dev, "invalid id size"); dev->id_avail = 0x1a; } } else { dev->id_format = IPACK_ID_VERSION_INVALID; dev->id_avail = 0; } if (!dev->id_avail) { ret = -ENODEV; goto out; } /* Obtain the amount of memory required to store a copy of the complete * ID ROM contents */ dev->id = kmalloc(dev->id_avail, GFP_KERNEL); if (!dev->id) { ret = -ENOMEM; goto out; } for (i = 0; i < dev->id_avail; i++) { if (dev->id_format == IPACK_ID_VERSION_1) dev->id[i] = ioread8(idmem + (i << 1) + 1); else dev->id[i] = ioread8(idmem + i); } /* now we can finally work with the copy */ switch (dev->id_format) { case IPACK_ID_VERSION_1: ipack_parse_id1(dev); break; case IPACK_ID_VERSION_2: ipack_parse_id2(dev); break; } out: iounmap(idmem); return ret; } int ipack_device_init(struct ipack_device *dev) { int ret; dev->dev.bus = &ipack_bus_type; dev->dev.release = ipack_device_release; dev->dev.parent = dev->bus->parent; dev_set_name(&dev->dev, "ipack-dev.%u.%u", dev->bus->bus_nr, dev->slot); device_initialize(&dev->dev); if (dev->bus->ops->set_clockrate(dev, 8)) dev_warn(&dev->dev, "failed to switch to 8 MHz operation for reading of device ID.\n"); if (dev->bus->ops->reset_timeout(dev)) dev_warn(&dev->dev, "failed to reset potential timeout."); ret = ipack_device_read_id(dev); if (ret < 0) { dev_err(&dev->dev, "error reading device id section.\n"); return ret; } /* if the device supports 32 MHz operation, use it. */ if (dev->speed_32mhz) { ret = dev->bus->ops->set_clockrate(dev, 32); if (ret < 0) dev_err(&dev->dev, "failed to switch to 32 MHz operation.\n"); } return 0; } EXPORT_SYMBOL_GPL(ipack_device_init); int ipack_device_add(struct ipack_device *dev) { return device_add(&dev->dev); } EXPORT_SYMBOL_GPL(ipack_device_add); void ipack_device_del(struct ipack_device *dev) { device_del(&dev->dev); ipack_put_device(dev); } EXPORT_SYMBOL_GPL(ipack_device_del); void ipack_get_device(struct ipack_device *dev) { get_device(&dev->dev); } EXPORT_SYMBOL_GPL(ipack_get_device); void ipack_put_device(struct ipack_device *dev) { put_device(&dev->dev); } EXPORT_SYMBOL_GPL(ipack_put_device); static int __init ipack_init(void) { ida_init(&ipack_ida); return bus_register(&ipack_bus_type); } static void __exit ipack_exit(void) { bus_unregister(&ipack_bus_type); ida_destroy(&ipack_ida); } module_init(ipack_init); module_exit(ipack_exit); MODULE_AUTHOR("Samuel Iglesias Gonsalvez <siglesias@igalia.com>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Industry-pack bus core");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1