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path: root/drivers/fmc/fmc-fakedev.c
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Diffstat (limited to 'drivers/fmc/fmc-fakedev.c')
-rw-r--r--drivers/fmc/fmc-fakedev.c355
1 files changed, 0 insertions, 355 deletions
diff --git a/drivers/fmc/fmc-fakedev.c b/drivers/fmc/fmc-fakedev.c
deleted file mode 100644
index 941d0930969a..000000000000
--- a/drivers/fmc/fmc-fakedev.c
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- * Copyright (C) 2012 CERN (www.cern.ch)
- * Author: Alessandro Rubini <rubini@gnudd.com>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * The software is provided "as is"; the copyright holders disclaim
- * all warranties and liabilities, to the extent permitted by
- * applicable law.
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-#include <linux/firmware.h>
-#include <linux/workqueue.h>
-#include <linux/err.h>
-#include <linux/fmc.h>
-
-#define FF_EEPROM_SIZE 8192 /* The standard eeprom size */
-#define FF_MAX_MEZZANINES 4 /* Fakes a multi-mezzanine carrier */
-
-/* The user can pass up to 4 names of eeprom images to load */
-static char *ff_eeprom[FF_MAX_MEZZANINES];
-static int ff_nr_eeprom;
-module_param_array_named(eeprom, ff_eeprom, charp, &ff_nr_eeprom, 0444);
-
-/* The user can ask for a multi-mezzanine carrier, with the default eeprom */
-static int ff_nr_dev = 1;
-module_param_named(ndev, ff_nr_dev, int, 0444);
-
-
-/* Lazily, don't support the "standard" module parameters */
-
-/*
- * Eeprom built from these commands:
-
- ../fru-generator -v fake-vendor -n fake-design-for-testing \
- -s 01234 -p none > IPMI-FRU
-
- gensdbfs . ../fake-eeprom.bin
-*/
-static char ff_eeimg[FF_MAX_MEZZANINES][FF_EEPROM_SIZE] = {
- {
- 0x01, 0x00, 0x00, 0x01, 0x00, 0x0c, 0x00, 0xf2, 0x01, 0x0b, 0x00, 0xb2,
- 0x86, 0x87, 0xcb, 0x66, 0x61, 0x6b, 0x65, 0x2d, 0x76, 0x65, 0x6e, 0x64,
- 0x6f, 0x72, 0xd7, 0x66, 0x61, 0x6b, 0x65, 0x2d, 0x64, 0x65, 0x73, 0x69,
- 0x67, 0x6e, 0x2d, 0x66, 0x6f, 0x72, 0x2d, 0x74, 0x65, 0x73, 0x74, 0x69,
- 0x6e, 0x67, 0xc5, 0x30, 0x31, 0x32, 0x33, 0x34, 0xc4, 0x6e, 0x6f, 0x6e,
- 0x65, 0xda, 0x32, 0x30, 0x31, 0x32, 0x2d, 0x31, 0x31, 0x2d, 0x31, 0x39,
- 0x20, 0x32, 0x32, 0x3a, 0x34, 0x32, 0x3a, 0x33, 0x30, 0x2e, 0x30, 0x37,
- 0x34, 0x30, 0x35, 0x35, 0xc1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87,
- 0x02, 0x02, 0x0d, 0xf7, 0xf8, 0x02, 0xb0, 0x04, 0x74, 0x04, 0xec, 0x04,
- 0x00, 0x00, 0x00, 0x00, 0xe8, 0x03, 0x02, 0x02, 0x0d, 0x5c, 0x93, 0x01,
- 0x4a, 0x01, 0x39, 0x01, 0x5a, 0x01, 0x00, 0x00, 0x00, 0x00, 0xb8, 0x0b,
- 0x02, 0x02, 0x0d, 0x63, 0x8c, 0x00, 0xfa, 0x00, 0xed, 0x00, 0x06, 0x01,
- 0x00, 0x00, 0x00, 0x00, 0xa0, 0x0f, 0x01, 0x02, 0x0d, 0xfb, 0xf5, 0x05,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x01, 0x02, 0x0d, 0xfc, 0xf4, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x0d, 0xfd, 0xf3, 0x03,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0xfa, 0x82, 0x0b, 0xea, 0x8f, 0xa2, 0x12, 0x00, 0x00, 0x1e, 0x44, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x53, 0x44, 0x42, 0x2d, 0x00, 0x03, 0x01, 0x01,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x01, 0xc4, 0x46, 0x69, 0x6c, 0x65, 0x44, 0x61, 0x74, 0x61,
- 0x2e, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
- 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc0,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc4, 0x46, 0x69, 0x6c, 0x65,
- 0x44, 0x61, 0x74, 0x61, 0x6e, 0x61, 0x6d, 0x65, 0x00, 0x00, 0x00, 0x01,
- 0x00, 0x00, 0x00, 0x00, 0x6e, 0x61, 0x6d, 0x65, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdf,
- 0x46, 0x69, 0x6c, 0x65, 0x44, 0x61, 0x74, 0x61, 0x49, 0x50, 0x4d, 0x49,
- 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x49, 0x50, 0x4d, 0x49,
- 0x2d, 0x46, 0x52, 0x55, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x01, 0x66, 0x61, 0x6b, 0x65, 0x0a,
- },
-};
-
-struct ff_dev {
- struct fmc_device *fmc[FF_MAX_MEZZANINES];
- struct device dev;
-};
-
-static struct ff_dev *ff_current_dev; /* We have 1 carrier, 1 slot */
-
-static int ff_reprogram(struct fmc_device *fmc, struct fmc_driver *drv,
- char *gw)
-{
- const struct firmware *fw;
- int ret;
-
- if (!gw) {
- /* program golden: success */
- fmc->flags &= ~FMC_DEVICE_HAS_CUSTOM;
- fmc->flags |= FMC_DEVICE_HAS_GOLDEN;
- return 0;
- }
-
- dev_info(&fmc->dev, "reprogramming with %s\n", gw);
- ret = request_firmware(&fw, gw, &fmc->dev);
- if (ret < 0) {
- dev_warn(&fmc->dev, "request firmware \"%s\": error %i\n",
- gw, ret);
- goto out;
- }
- fmc->flags &= ~FMC_DEVICE_HAS_GOLDEN;
- fmc->flags |= FMC_DEVICE_HAS_CUSTOM;
-
-out:
- release_firmware(fw);
- return ret;
-}
-
-static int ff_irq_request(struct fmc_device *fmc, irq_handler_t handler,
- char *name, int flags)
-{
- return -EOPNOTSUPP;
-}
-
-/* FIXME: should also have some fake FMC GPIO mapping */
-
-
-/*
- * This work function is called when we changed the eeprom. It removes the
- * current fmc device and registers a new one, with different identifiers.
- */
-static struct ff_dev *ff_dev_create(void); /* defined later */
-
-static void ff_work_fn(struct work_struct *work)
-{
- struct ff_dev *ff = ff_current_dev;
- int ret;
-
- fmc_device_unregister_n(ff->fmc, ff_nr_dev);
- device_unregister(&ff->dev);
- ff_current_dev = NULL;
-
- ff = ff_dev_create();
- if (IS_ERR(ff)) {
- pr_warning("%s: can't re-create FMC devices\n", __func__);
- return;
- }
- ret = fmc_device_register_n(ff->fmc, ff_nr_dev);
- if (ret < 0) {
- dev_warn(&ff->dev, "can't re-register FMC devices\n");
- device_unregister(&ff->dev);
- return;
- }
-
- ff_current_dev = ff;
-}
-
-static DECLARE_DELAYED_WORK(ff_work, ff_work_fn);
-
-
-/* low-level i2c */
-static int ff_eeprom_read(struct fmc_device *fmc, uint32_t offset,
- void *buf, size_t size)
-{
- if (offset > FF_EEPROM_SIZE)
- return -EINVAL;
- if (offset + size > FF_EEPROM_SIZE)
- size = FF_EEPROM_SIZE - offset;
- memcpy(buf, fmc->eeprom + offset, size);
- return size;
-}
-
-static int ff_eeprom_write(struct fmc_device *fmc, uint32_t offset,
- const void *buf, size_t size)
-{
- if (offset > FF_EEPROM_SIZE)
- return -EINVAL;
- if (offset + size > FF_EEPROM_SIZE)
- size = FF_EEPROM_SIZE - offset;
- dev_info(&fmc->dev, "write_eeprom: offset %i, size %zi\n",
- (int)offset, size);
- memcpy(fmc->eeprom + offset, buf, size);
- schedule_delayed_work(&ff_work, HZ * 2); /* remove, replug, in 2s */
- return size;
-}
-
-/* i2c operations for fmc */
-static int ff_read_ee(struct fmc_device *fmc, int pos, void *data, int len)
-{
- if (!(fmc->flags & FMC_DEVICE_HAS_GOLDEN))
- return -EOPNOTSUPP;
- return ff_eeprom_read(fmc, pos, data, len);
-}
-
-static int ff_write_ee(struct fmc_device *fmc, int pos,
- const void *data, int len)
-{
- if (!(fmc->flags & FMC_DEVICE_HAS_GOLDEN))
- return -EOPNOTSUPP;
- return ff_eeprom_write(fmc, pos, data, len);
-}
-
-/* readl and writel do not do anything. Don't waste RAM with "base" */
-static uint32_t ff_readl(struct fmc_device *fmc, int offset)
-{
- return 0;
-}
-
-static void ff_writel(struct fmc_device *fmc, uint32_t value, int offset)
-{
- return;
-}
-
-/* validate is useful so fmc-write-eeprom will not reprogram every 2 seconds */
-static int ff_validate(struct fmc_device *fmc, struct fmc_driver *drv)
-{
- int i;
-
- if (!drv->busid_n)
- return 0; /* everyhing is valid */
- for (i = 0; i < drv->busid_n; i++)
- if (drv->busid_val[i] == fmc->device_id)
- return i;
- return -ENOENT;
-}
-
-
-
-static struct fmc_operations ff_fmc_operations = {
- .read32 = ff_readl,
- .write32 = ff_writel,
- .reprogram = ff_reprogram,
- .irq_request = ff_irq_request,
- .read_ee = ff_read_ee,
- .write_ee = ff_write_ee,
- .validate = ff_validate,
-};
-
-/* This device is kmalloced: release it */
-static void ff_dev_release(struct device *dev)
-{
- struct ff_dev *ff = container_of(dev, struct ff_dev, dev);
- kfree(ff);
-}
-
-static struct fmc_device ff_template_fmc = {
- .version = FMC_VERSION,
- .owner = THIS_MODULE,
- .carrier_name = "fake-fmc-carrier",
- .device_id = 0xf001, /* fool */
- .eeprom_len = sizeof(ff_eeimg[0]),
- .memlen = 0x1000, /* 4k, to show something */
- .op = &ff_fmc_operations,
- .hwdev = NULL, /* filled at creation time */
- .flags = FMC_DEVICE_HAS_GOLDEN,
-};
-
-static struct ff_dev *ff_dev_create(void)
-{
- struct ff_dev *ff;
- struct fmc_device *fmc;
- int i, ret;
-
- ff = kzalloc(sizeof(*ff), GFP_KERNEL);
- if (!ff)
- return ERR_PTR(-ENOMEM);
- dev_set_name(&ff->dev, "fake-fmc-carrier");
- ff->dev.release = ff_dev_release;
-
- ret = device_register(&ff->dev);
- if (ret < 0) {
- put_device(&ff->dev);
- return ERR_PTR(ret);
- }
-
- /* Create fmc structures that refer to this new "hw" device */
- for (i = 0; i < ff_nr_dev; i++) {
- fmc = kmemdup(&ff_template_fmc, sizeof(ff_template_fmc),
- GFP_KERNEL);
- fmc->hwdev = &ff->dev;
- fmc->carrier_data = ff;
- fmc->nr_slots = ff_nr_dev;
- /* the following fields are different for each slot */
- fmc->eeprom = ff_eeimg[i];
- fmc->eeprom_addr = 0x50 + 2 * i;
- fmc->slot_id = i;
- ff->fmc[i] = fmc;
- /* increment the identifier, each must be different */
- ff_template_fmc.device_id++;
- }
- return ff;
-}
-
-/* init and exit */
-static int ff_init(void)
-{
- struct ff_dev *ff;
- const struct firmware *fw;
- int i, len, ret = 0;
-
- /* Replicate the default eeprom for the max number of mezzanines */
- for (i = 1; i < FF_MAX_MEZZANINES; i++)
- memcpy(ff_eeimg[i], ff_eeimg[0], sizeof(ff_eeimg[0]));
-
- if (ff_nr_eeprom > ff_nr_dev)
- ff_nr_dev = ff_nr_eeprom;
-
- ff = ff_dev_create();
- if (IS_ERR(ff))
- return PTR_ERR(ff);
-
- /* If the user passed "eeprom=" as a parameter, fetch them */
- for (i = 0; i < ff_nr_eeprom; i++) {
- if (!strlen(ff_eeprom[i]))
- continue;
- ret = request_firmware(&fw, ff_eeprom[i], &ff->dev);
- if (ret < 0) {
- dev_err(&ff->dev, "Mezzanine %i: can't load \"%s\" "
- "(error %i)\n", i, ff_eeprom[i], -ret);
- } else {
- len = min_t(size_t, fw->size, (size_t)FF_EEPROM_SIZE);
- memcpy(ff_eeimg[i], fw->data, len);
- release_firmware(fw);
- dev_info(&ff->dev, "Mezzanine %i: eeprom \"%s\"\n", i,
- ff_eeprom[i]);
- }
- }
-
- ret = fmc_device_register_n(ff->fmc, ff_nr_dev);
- if (ret) {
- device_unregister(&ff->dev);
- return ret;
- }
- ff_current_dev = ff;
- return ret;
-}
-
-static void ff_exit(void)
-{
- if (ff_current_dev) {
- fmc_device_unregister_n(ff_current_dev->fmc, ff_nr_dev);
- device_unregister(&ff_current_dev->dev);
- }
- cancel_delayed_work_sync(&ff_work);
-}
-
-module_init(ff_init);
-module_exit(ff_exit);
-
-MODULE_LICENSE("Dual BSD/GPL");