diff options
Diffstat (limited to 'arch/sandbox/board/hostfile.c')
-rw-r--r-- | arch/sandbox/board/hostfile.c | 246 |
1 files changed, 194 insertions, 52 deletions
diff --git a/arch/sandbox/board/hostfile.c b/arch/sandbox/board/hostfile.c index e5a7580d07..7afad95b6d 100644 --- a/arch/sandbox/board/hostfile.c +++ b/arch/sandbox/board/hostfile.c @@ -3,9 +3,6 @@ * * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix * - * See file CREDITS for list of people who contributed to this - * project. - * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. @@ -19,25 +16,29 @@ #include <common.h> #include <driver.h> +#include <block.h> +#include <disks.h> #include <malloc.h> #include <mach/linux.h> #include <init.h> #include <errno.h> #include <linux/err.h> #include <mach/hostfile.h> +#include <featctrl.h> #include <xfuncs.h> -#include <linux/err.h> - struct hf_priv { - struct cdev cdev; + union { + struct block_device blk; + struct cdev cdev; + }; const char *filename; int fd; + struct feature_controller feat; }; -static ssize_t hf_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags) +static ssize_t hf_read(struct hf_priv *priv, void *buf, size_t count, loff_t offset, ulong flags) { - struct hf_priv *priv= cdev->priv; int fd = priv->fd; if (linux_lseek(fd, offset) != offset) @@ -46,9 +47,8 @@ static ssize_t hf_read(struct cdev *cdev, void *buf, size_t count, loff_t offset return linux_read(fd, buf, count); } -static ssize_t hf_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags) +static ssize_t hf_write(struct hf_priv *priv, const void *buf, size_t count, loff_t offset, ulong flags) { - struct hf_priv *priv = cdev->priv; int fd = priv->fd; if (linux_lseek(fd, offset) != offset) @@ -57,59 +57,135 @@ static ssize_t hf_write(struct cdev *cdev, const void *buf, size_t count, loff_t return linux_write(fd, buf, count); } -static void hf_info(struct device_d *dev) +static ssize_t hf_cdev_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags) +{ + return hf_read(cdev->priv, buf, count, offset, flags); +} + +static ssize_t hf_cdev_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags) +{ + return hf_write(cdev->priv, buf, count, offset, flags); +} + +static struct cdev_operations hf_cdev_ops = { + .read = hf_cdev_read, + .write = hf_cdev_write, +}; + +static int hf_blk_read(struct block_device *blk, void *buf, sector_t block, blkcnt_t num_blocks) +{ + ssize_t ret = hf_read(container_of(blk, struct hf_priv, blk), buf, + num_blocks << SECTOR_SHIFT, block << SECTOR_SHIFT, 0); + return ret > 0 ? 0 : ret; +} + +static int hf_blk_write(struct block_device *blk, const void *buf, sector_t block, blkcnt_t num_blocks) +{ + ssize_t ret = hf_write(container_of(blk, struct hf_priv, blk), buf, + num_blocks << SECTOR_SHIFT, block << SECTOR_SHIFT, 0); + return ret > 0 ? 0 : ret; +} + +static struct block_device_ops hf_blk_ops = { + .read = hf_blk_read, + .write = hf_blk_write, +}; + +static void hf_info(struct device *dev) { struct hf_priv *priv = dev->priv; printf("file: %s\n", priv->filename); } -static struct cdev_operations hf_fops = { - .read = hf_read, - .write = hf_write, -}; +static int hostfile_feat_check(struct feature_controller *feat, int idx) +{ + struct hf_priv *priv = container_of(feat, struct hf_priv, feat); -static int hf_probe(struct device_d *dev) + return priv->fd >= 0 ? FEATCTRL_OKAY : FEATCTRL_GATED; +} + +static int hf_probe(struct device *dev) { + struct device_node *np = dev->of_node; struct hf_priv *priv = xzalloc(sizeof(*priv)); - struct resource *res; + struct cdev *cdev; + bool is_featctrl = false, is_blockdev; + u64 reg[2]; int err; - res = dev_get_resource(dev, IORESOURCE_MEM, 0); - if (IS_ERR(res)) - return PTR_ERR(res); + if (!np) + return -ENODEV; + + dev->priv = priv; + priv->fd = -1; - priv->cdev.size = resource_size(res); + if (IS_ENABLED(CONFIG_FEATURE_CONTROLLER) && + of_property_read_bool(np, "barebox,feature-controller")) { + priv->feat.dev = dev; + priv->feat.check = hostfile_feat_check; - if (!dev->device_node) - return -ENODEV; + err = feature_controller_register(&priv->feat); + if (err) + return err; - of_property_read_u32(dev->device_node, "barebox,fd", &priv->fd); + is_featctrl = true; + } - err = of_property_read_string(dev->device_node, "barebox,filename", - &priv->filename); + + err = of_property_read_u64_array(np, "reg", reg, ARRAY_SIZE(reg)); if (err) return err; - if (!priv->fd) - priv->fd = linux_open(priv->filename, true); + of_property_read_u32(np, "barebox,fd", &priv->fd); + + err = of_property_read_string(np, "barebox,filename", + &priv->filename); + if (err) + return err; - priv->cdev.name = dev->device_node->name; - priv->cdev.dev = dev; - priv->cdev.ops = &hf_fops; - priv->cdev.priv = priv; + if (priv->fd < 0) + return is_featctrl ? 0 : priv->fd; dev->info = hf_info; - dev->priv = priv; - err = devfs_create(&priv->cdev); - if (err) - return err; + is_blockdev = of_property_read_bool(np, "barebox,blockdev"); - of_parse_partitions(&priv->cdev, dev->device_node); - of_partitions_register_fixup(&priv->cdev); + cdev = is_blockdev ? &priv->blk.cdev : &priv->cdev; - return 0; + cdev_set_of_node(cdev, np); + + if (is_blockdev) { + cdev->name = np->name; + priv->blk.dev = dev; + priv->blk.ops = &hf_blk_ops; + priv->blk.blockbits = SECTOR_SHIFT; + priv->blk.num_blocks = reg[1] / SECTOR_SIZE; + priv->blk.type = BLK_TYPE_VIRTUAL; + + err = blockdevice_register(&priv->blk); + if (err) + return err; + + dev_info(dev, "registered as block device\n"); + } else { + cdev->name = np->name; + cdev->dev = dev; + cdev->ops = &hf_cdev_ops; + cdev->size = reg[1]; + cdev->priv = priv; + + err = devfs_create(cdev); + if (err) + return err; + + dev_info(dev, "registered as character device\n"); + } + + of_parse_partitions(cdev, np); + of_partitions_register_fixup(cdev); + + return of_platform_populate(np, NULL, dev); } static __maybe_unused struct of_device_id hostfile_dt_ids[] = { @@ -119,45 +195,111 @@ static __maybe_unused struct of_device_id hostfile_dt_ids[] = { /* sentinel */ } }; +MODULE_DEVICE_TABLE(of, hostfile_dt_ids); -static struct driver_d hf_drv = { +static struct driver hf_drv = { .name = "hostfile", .of_compatible = DRV_OF_COMPAT(hostfile_dt_ids), .probe = hf_probe, }; -coredevice_platform_driver(hf_drv); +device_platform_driver(hf_drv); static int of_hostfile_fixup(struct device_node *root, void *ctx) { struct hf_info *hf = ctx; struct device_node *node; - uint32_t reg[] = { - hf->base >> 32, - hf->base, - hf->size - }; + bool name_only = false; int ret; - node = of_new_node(root, hf->devname); + node = of_get_child_by_name(root, hf->devname); + if (node) + name_only = true; + else + node = of_new_node(root, hf->devname); - ret = of_property_write_string(node, "compatible", hostfile_dt_ids->compatible); + ret = of_property_write_string(node, "barebox,filename", hf->filename); if (ret) return ret; - ret = of_property_write_u32_array(node, "reg", reg, ARRAY_SIZE(reg)); + if (name_only) + return 0; + + ret = of_property_write_string(node, "compatible", hostfile_dt_ids->compatible); if (ret) return ret; - ret = of_property_write_u32(node, "barebox,fd", hf->fd); + ret = of_property_write_bool(node, "barebox,blockdev", hf->is_blockdev); if (ret) return ret; - ret = of_property_write_string(node, "barebox,filename", hf->filename); + ret = of_property_write_bool(node, "barebox,cdev", hf->is_cdev); + if (ret) + return ret; - return ret; + return of_property_write_bool(node, "barebox,read-only", hf->is_readonly); } int barebox_register_filedev(struct hf_info *hf) { return of_register_fixup(of_hostfile_fixup, hf); } + +static int of_hostfile_map_fixup(struct device_node *root, void *ctx) +{ + struct device_node *node; + int ret; + + for_each_compatible_node_from(node, root, NULL, "barebox,stickypage") { + char *filename; + + filename = linux_get_stickypage_path(); + if (!filename) { + pr_err("error allocating stickypage\n"); + continue; + } + + of_property_write_string(node, "barebox,filename", filename); + of_property_write_string(node, "compatible", "barebox,hostfile"); + } + + for_each_compatible_node_from(node, root, NULL, "barebox,hostfile") { + struct hf_info hf = {}; + uint64_t reg[2] = {}; + + hf.devname = node->name; + + ret = of_property_read_string(node, "barebox,filename", &hf.filename); + if (ret) { + pr_err("skipping nameless hostfile %s\n", hf.devname); + continue; + } + + hf.is_blockdev = of_property_read_bool(node, "barebox,blockdev"); + hf.is_cdev = of_property_read_bool(node, "barebox,cdev"); + hf.is_readonly = of_property_read_bool(node, "barebox,read-only"); + + of_property_read_u64_array(node, "reg", reg, ARRAY_SIZE(reg)); + + hf.base = reg[0]; + hf.size = reg[1]; + + ret = linux_open_hostfile(&hf); + if (ret) + continue; + + reg[0] = hf.base; + reg[1] = hf.size; + + of_property_write_u64_array(node, "reg", reg, ARRAY_SIZE(reg)); + of_property_write_bool(node, "barebox,blockdev", hf.is_blockdev); + of_property_write_u32(node, "barebox,fd", hf.fd); + } + + return 0; +} + +static int barebox_fixup_filedevs(void) +{ + return of_register_fixup(of_hostfile_map_fixup, NULL); +} +pure_initcall(barebox_fixup_filedevs); |