132 lines
4.3 KiB
Diff
132 lines
4.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Vladimir Serbinenko <phcoder@gmail.com>
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Date: Tue, 9 May 2017 08:40:29 +0200
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Subject: [PATCH] fdtbus: Add ability to send/receive messages on parent
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busses.
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---
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grub-core/bus/fdt.c | 35 +++++++++++++++++------------------
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include/grub/fdtbus.h | 18 +++++++++++++++++-
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2 files changed, 34 insertions(+), 19 deletions(-)
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diff --git a/grub-core/bus/fdt.c b/grub-core/bus/fdt.c
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index 34d53545732..135da497ba6 100644
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--- a/grub-core/bus/fdt.c
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+++ b/grub-core/bus/fdt.c
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@@ -25,30 +25,22 @@ static grub_size_t root_address_cells, root_size_cells;
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/* Pointer to this symbol signals invalid mapping. */
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char grub_fdtbus_invalid_mapping[1];
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-struct grub_fdtbus_dev
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-{
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- struct grub_fdtbus_dev *next;
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- struct grub_fdtbus_dev *parent;
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- int node;
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- struct grub_fdtbus_driver *driver;
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-};
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-
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struct grub_fdtbus_dev *devs;
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struct grub_fdtbus_driver *drivers;
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-static int
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-is_compatible (struct grub_fdtbus_driver *driver,
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- int node)
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+int
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+grub_fdtbus_is_compatible (const char *compat_string,
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+ const struct grub_fdtbus_dev *dev)
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{
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grub_size_t compatible_size;
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- const char *compatible = grub_fdt_get_prop (dtb, node, "compatible",
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+ const char *compatible = grub_fdt_get_prop (dtb, dev->node, "compatible",
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&compatible_size);
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if (!compatible)
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return 0;
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const char *compatible_end = compatible + compatible_size;
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while (compatible < compatible_end)
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{
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- if (grub_strcmp (driver->compatible, compatible) == 0)
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+ if (grub_strcmp (compat_string, compatible) == 0)
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return 1;
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compatible += grub_strlen (compatible) + 1;
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}
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@@ -75,10 +67,12 @@ fdtbus_scan (struct grub_fdtbus_dev *parent)
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dev->parent = parent;
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devs = dev;
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FOR_LIST_ELEMENTS(driver, drivers)
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- if (!dev->driver && is_compatible (driver, node))
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+ if (!dev->driver && grub_fdtbus_is_compatible (driver->compatible, dev))
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{
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- if (driver->attach(dev) == GRUB_ERR_NONE)
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+ grub_dprintf ("fdtbus", "Attaching %s\n", driver->compatible);
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+ if (driver->attach (dev) == GRUB_ERR_NONE)
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{
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+ grub_dprintf ("fdtbus", "Attached %s\n", driver->compatible);
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dev->driver = driver;
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break;
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}
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@@ -92,13 +86,18 @@ void
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grub_fdtbus_register (struct grub_fdtbus_driver *driver)
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{
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struct grub_fdtbus_dev *dev;
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+ grub_dprintf ("fdtbus", "Registering %s\n", driver->compatible);
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grub_list_push (GRUB_AS_LIST_P (&drivers),
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GRUB_AS_LIST (driver));
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for (dev = devs; dev; dev = dev->next)
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- if (!dev->driver && is_compatible (driver, dev->node))
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+ if (!dev->driver && grub_fdtbus_is_compatible (driver->compatible, dev))
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{
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- if (driver->attach(dev) == GRUB_ERR_NONE)
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- dev->driver = driver;
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+ grub_dprintf ("fdtbus", "Attaching %s (%p)\n", driver->compatible, dev);
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+ if (driver->attach (dev) == GRUB_ERR_NONE)
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+ {
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+ grub_dprintf ("fdtbus", "Attached %s\n", driver->compatible);
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+ dev->driver = driver;
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+ }
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grub_print_error ();
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}
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}
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diff --git a/include/grub/fdtbus.h b/include/grub/fdtbus.h
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index 985837e55f6..f519c40ec35 100644
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--- a/include/grub/fdtbus.h
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+++ b/include/grub/fdtbus.h
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@@ -22,7 +22,13 @@
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#include <grub/fdt.h>
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#include <grub/err.h>
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-struct grub_fdtbus_dev;
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+struct grub_fdtbus_dev
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+{
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+ struct grub_fdtbus_dev *next;
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+ struct grub_fdtbus_dev *parent;
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+ int node;
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+ struct grub_fdtbus_driver *driver;
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+};
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struct grub_fdtbus_driver
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{
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@@ -33,6 +39,12 @@ struct grub_fdtbus_driver
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grub_err_t (*attach) (const struct grub_fdtbus_dev *dev);
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void (*detach) (const struct grub_fdtbus_dev *dev);
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+
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+ /* Message bus operations. */
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+ grub_err_t (*send) (const struct grub_fdtbus_dev *dev, const void *data, grub_size_t sz);
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+ grub_err_t (*receive) (const struct grub_fdtbus_dev *dev, void *data, grub_size_t sz);
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+ grub_err_t (*start) (const struct grub_fdtbus_dev *dev);
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+ void (*stop) (const struct grub_fdtbus_dev *dev);
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};
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extern char EXPORT_VAR(grub_fdtbus_invalid_mapping)[1];
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@@ -63,6 +75,10 @@ EXPORT_FUNC(grub_fdtbus_register) (struct grub_fdtbus_driver *driver);
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void
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EXPORT_FUNC(grub_fdtbus_unregister) (struct grub_fdtbus_driver *driver);
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+int
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+EXPORT_FUNC(grub_fdtbus_is_compatible) (const char *compat_string,
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+ const struct grub_fdtbus_dev *dev);
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+
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/* Must be called before any register(). */
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/* dtb is assumed to be unfreeable and must remain
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valid for lifetime of GRUB.
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