*
* - Provides an API for platform code or device drivers to
* dynamically add or remove address decoding windows for the CPU ->
- * device accesses. This API is mvebu_mbus_add_window(),
- * mvebu_mbus_add_window_remap_flags() and
- * mvebu_mbus_del_window(). Since the (target, attribute) values
- * differ from one SoC family to another, the API uses a 'const char
- * *' string to identify devices, and this driver is responsible for
- * knowing the mapping between the name of a device and its
- * corresponding (target, attribute) in the current SoC family.
+ * device accesses. This API is mvebu_mbus_add_window_by_id(),
+ * mvebu_mbus_add_window_remap_by_id() and
+ * mvebu_mbus_del_window().
*
* - Provides a debugfs interface in /sys/kernel/debug/mvebu-mbus/ to
* see the list of CPU -> SDRAM windows and their configuration
#define DOVE_DDR_BASE_CS_OFF(n) ((n) << 4)
-struct mvebu_mbus_mapping {
- const char *name;
- u8 target;
- u8 attr;
- u8 attrmask;
-};
-
-/*
- * Masks used for the 'attrmask' field of mvebu_mbus_mapping. They
- * allow to get the real attribute value, discarding the special bits
- * used to select a PCI MEM region or a PCI WA region. This allows the
- * debugfs code to reverse-match the name of a device from its
- * target/attr values.
- *
- * For all devices except PCI, all bits of 'attr' must be
- * considered. For most SoCs, only bit 3 should be ignored (it allows
- * to select between PCI MEM and PCI I/O). On Orion5x however, there
- * is the special bit 5 to select a PCI WA region.
- */
-#define MAPDEF_NOMASK 0xff
-#define MAPDEF_PCIMASK 0xf7
-#define MAPDEF_ORIONPCIMASK 0xd7
-
-/* Macro used to define one mvebu_mbus_mapping entry */
-#define MAPDEF(__n, __t, __a, __m) \
- { .name = __n, .target = __t, .attr = __a, .attrmask = __m }
-
struct mvebu_mbus_state;
struct mvebu_mbus_soc_data {
void (*setup_cpu_target)(struct mvebu_mbus_state *s);
int (*show_cpu_target)(struct mvebu_mbus_state *s,
struct seq_file *seq, void *v);
- const struct mvebu_mbus_mapping *map;
};
struct mvebu_mbus_state {
struct dentry *debugfs_root;
struct dentry *debugfs_sdram;
struct dentry *debugfs_devs;
+ struct resource pcie_mem_aperture;
+ struct resource pcie_io_aperture;
const struct mvebu_mbus_soc_data *soc;
int hw_io_coherency;
};
u64 wbase, wremap;
u32 wsize;
u8 wtarget, wattr;
- int enabled, i;
- const char *name;
+ int enabled;
mvebu_mbus_read_window(mbus, win,
&enabled, &wbase, &wsize,
continue;
}
-
- for (i = 0; mbus->soc->map[i].name; i++)
- if (mbus->soc->map[i].target == wtarget &&
- mbus->soc->map[i].attr ==
- (wattr & mbus->soc->map[i].attrmask))
- break;
-
- name = mbus->soc->map[i].name ?: "unknown";
-
- seq_printf(seq, "[%02d] %016llx - %016llx : %s",
+ seq_printf(seq, "[%02d] %016llx - %016llx : %04x:%04x",
win, (unsigned long long)wbase,
- (unsigned long long)(wbase + wsize), name);
+ (unsigned long long)(wbase + wsize), wtarget, wattr);
if (win < mbus->soc->num_remappable_wins) {
seq_printf(seq, " (remap %016llx)\n",
mvebu_mbus_dram_info.num_cs = cs;
}
-static const struct mvebu_mbus_mapping armada_370_map[] = {
- MAPDEF("bootrom", 1, 0xe0, MAPDEF_NOMASK),
- MAPDEF("devbus-boot", 1, 0x2f, MAPDEF_NOMASK),
- MAPDEF("devbus-cs0", 1, 0x3e, MAPDEF_NOMASK),
- MAPDEF("devbus-cs1", 1, 0x3d, MAPDEF_NOMASK),
- MAPDEF("devbus-cs2", 1, 0x3b, MAPDEF_NOMASK),
- MAPDEF("devbus-cs3", 1, 0x37, MAPDEF_NOMASK),
- MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK),
- {},
-};
-
-static const struct mvebu_mbus_soc_data armada_370_mbus_data = {
+static const struct mvebu_mbus_soc_data armada_370_xp_mbus_data = {
.num_wins = 20,
.num_remappable_wins = 8,
.win_cfg_offset = armada_370_xp_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = armada_370_map,
-};
-
-static const struct mvebu_mbus_mapping armada_xp_map[] = {
- MAPDEF("bootrom", 1, 0x1d, MAPDEF_NOMASK),
- MAPDEF("devbus-boot", 1, 0x2f, MAPDEF_NOMASK),
- MAPDEF("devbus-cs0", 1, 0x3e, MAPDEF_NOMASK),
- MAPDEF("devbus-cs1", 1, 0x3d, MAPDEF_NOMASK),
- MAPDEF("devbus-cs2", 1, 0x3b, MAPDEF_NOMASK),
- MAPDEF("devbus-cs3", 1, 0x37, MAPDEF_NOMASK),
- MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.1", 4, 0xd0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.2", 4, 0xb0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.3", 4, 0x70, MAPDEF_PCIMASK),
- MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.1", 8, 0xd0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.2", 8, 0xb0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.3", 8, 0x70, MAPDEF_PCIMASK),
- MAPDEF("pcie2.0", 4, 0xf0, MAPDEF_PCIMASK),
- MAPDEF("pcie3.0", 8, 0xf0, MAPDEF_PCIMASK),
- {},
-};
-
-static const struct mvebu_mbus_soc_data armada_xp_mbus_data = {
- .num_wins = 20,
- .num_remappable_wins = 8,
- .win_cfg_offset = armada_370_xp_mbus_win_offset,
- .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
- .show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = armada_xp_map,
-};
-
-static const struct mvebu_mbus_mapping kirkwood_map[] = {
- MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.0", 4, 0xd0, MAPDEF_PCIMASK),
- MAPDEF("sram", 3, 0x01, MAPDEF_NOMASK),
- MAPDEF("nand", 1, 0x2f, MAPDEF_NOMASK),
- {},
};
static const struct mvebu_mbus_soc_data kirkwood_mbus_data = {
.win_cfg_offset = orion_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = kirkwood_map,
-};
-
-static const struct mvebu_mbus_mapping dove_map[] = {
- MAPDEF("pcie0.0", 0x4, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.0", 0x8, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("cesa", 0x3, 0x01, MAPDEF_NOMASK),
- MAPDEF("bootrom", 0x1, 0xfd, MAPDEF_NOMASK),
- MAPDEF("scratchpad", 0xd, 0x0, MAPDEF_NOMASK),
- {},
};
static const struct mvebu_mbus_soc_data dove_mbus_data = {
.win_cfg_offset = orion_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_dove_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_dove,
- .map = dove_map,
-};
-
-static const struct mvebu_mbus_mapping orion5x_map[] = {
- MAPDEF("pcie0.0", 4, 0x51, MAPDEF_ORIONPCIMASK),
- MAPDEF("pci0.0", 3, 0x51, MAPDEF_ORIONPCIMASK),
- MAPDEF("devbus-boot", 1, 0x0f, MAPDEF_NOMASK),
- MAPDEF("devbus-cs0", 1, 0x1e, MAPDEF_NOMASK),
- MAPDEF("devbus-cs1", 1, 0x1d, MAPDEF_NOMASK),
- MAPDEF("devbus-cs2", 1, 0x1b, MAPDEF_NOMASK),
- MAPDEF("sram", 0, 0x00, MAPDEF_NOMASK),
- {},
};
/*
.win_cfg_offset = orion_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = orion5x_map,
};
static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = {
.win_cfg_offset = orion_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = orion5x_map,
-};
-
-static const struct mvebu_mbus_mapping mv78xx0_map[] = {
- MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.1", 4, 0xd0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.2", 4, 0xb0, MAPDEF_PCIMASK),
- MAPDEF("pcie0.3", 4, 0x70, MAPDEF_PCIMASK),
- MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.1", 8, 0xd0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.2", 8, 0xb0, MAPDEF_PCIMASK),
- MAPDEF("pcie1.3", 8, 0x70, MAPDEF_PCIMASK),
- MAPDEF("pcie2.0", 4, 0xf0, MAPDEF_PCIMASK),
- MAPDEF("pcie3.0", 8, 0xf0, MAPDEF_PCIMASK),
- {},
};
static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = {
.win_cfg_offset = mv78xx0_mbus_win_offset,
.setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
.show_cpu_target = mvebu_sdram_debug_show_orion,
- .map = mv78xx0_map,
};
/*
*/
static const struct of_device_id of_mvebu_mbus_ids[] = {
{ .compatible = "marvell,armada370-mbus",
- .data = &armada_370_mbus_data, },
+ .data = &armada_370_xp_mbus_data, },
{ .compatible = "marvell,armadaxp-mbus",
- .data = &armada_xp_mbus_data, },
+ .data = &armada_370_xp_mbus_data, },
{ .compatible = "marvell,kirkwood-mbus",
.data = &kirkwood_mbus_data, },
{ .compatible = "marvell,dove-mbus",
/*
* Public API of the driver
*/
-int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
- size_t size, phys_addr_t remap,
- unsigned int flags)
+int mvebu_mbus_add_window_remap_by_id(unsigned int target,
+ unsigned int attribute,
+ phys_addr_t base, size_t size,
+ phys_addr_t remap)
{
struct mvebu_mbus_state *s = &mbus_state;
- u8 target, attr;
- int i;
-
- if (!s->soc->map)
- return -ENODEV;
-
- for (i = 0; s->soc->map[i].name; i++)
- if (!strcmp(s->soc->map[i].name, devname))
- break;
-
- if (!s->soc->map[i].name) {
- pr_err("unknown device '%s'\n", devname);
- return -ENODEV;
- }
-
- target = s->soc->map[i].target;
- attr = s->soc->map[i].attr;
-
- if (flags == MVEBU_MBUS_PCI_MEM)
- attr |= 0x8;
- else if (flags == MVEBU_MBUS_PCI_WA)
- attr |= 0x28;
- if (!mvebu_mbus_window_conflicts(s, base, size, target, attr)) {
- pr_err("cannot add window '%s', conflicts with another window\n",
- devname);
+ if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) {
+ pr_err("cannot add window '%x:%x', conflicts with another window\n",
+ target, attribute);
return -EINVAL;
}
- return mvebu_mbus_alloc_window(s, base, size, remap, target, attr);
-
+ return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute);
}
-int mvebu_mbus_add_window(const char *devname, phys_addr_t base, size_t size)
+int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
+ phys_addr_t base, size_t size)
{
- return mvebu_mbus_add_window_remap_flags(devname, base, size,
- MVEBU_MBUS_NO_REMAP, 0);
+ return mvebu_mbus_add_window_remap_by_id(target, attribute, base,
+ size, MVEBU_MBUS_NO_REMAP);
}
int mvebu_mbus_del_window(phys_addr_t base, size_t size)
return 0;
}
+void mvebu_mbus_get_pcie_mem_aperture(struct resource *res)
+{
+ if (!res)
+ return;
+ *res = mbus_state.pcie_mem_aperture;
+}
+
+void mvebu_mbus_get_pcie_io_aperture(struct resource *res)
+{
+ if (!res)
+ return;
+ *res = mbus_state.pcie_io_aperture;
+}
+
static __init int mvebu_mbus_debugfs_init(void)
{
struct mvebu_mbus_state *s = &mbus_state;
}
fs_initcall(mvebu_mbus_debugfs_init);
+static int __init mvebu_mbus_common_init(struct mvebu_mbus_state *mbus,
+ phys_addr_t mbuswins_phys_base,
+ size_t mbuswins_size,
+ phys_addr_t sdramwins_phys_base,
+ size_t sdramwins_size)
+{
+ int win;
+
+ mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size);
+ if (!mbus->mbuswins_base)
+ return -ENOMEM;
+
+ mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size);
+ if (!mbus->sdramwins_base) {
+ iounmap(mbus_state.mbuswins_base);
+ return -ENOMEM;
+ }
+
+ if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"))
+ mbus->hw_io_coherency = 1;
+
+ for (win = 0; win < mbus->soc->num_wins; win++)
+ mvebu_mbus_disable_window(mbus, win);
+
+ mbus->soc->setup_cpu_target(mbus);
+
+ return 0;
+}
+
int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base,
size_t mbuswins_size,
phys_addr_t sdramwins_phys_base,
size_t sdramwins_size)
{
- struct mvebu_mbus_state *mbus = &mbus_state;
const struct of_device_id *of_id;
- int win;
for (of_id = of_mvebu_mbus_ids; of_id->compatible; of_id++)
if (!strcmp(of_id->compatible, soc))
return -ENODEV;
}
- mbus->soc = of_id->data;
+ mbus_state.soc = of_id->data;
- mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size);
- if (!mbus->mbuswins_base)
- return -ENOMEM;
+ return mvebu_mbus_common_init(&mbus_state,
+ mbuswins_phys_base,
+ mbuswins_size,
+ sdramwins_phys_base,
+ sdramwins_size);
+}
- mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size);
- if (!mbus->sdramwins_base) {
- iounmap(mbus_state.mbuswins_base);
+#ifdef CONFIG_OF
+/*
+ * The window IDs in the ranges DT property have the following format:
+ * - bits 28 to 31: MBus custom field
+ * - bits 24 to 27: window target ID
+ * - bits 16 to 23: window attribute ID
+ * - bits 0 to 15: unused
+ */
+#define CUSTOM(id) (((id) & 0xF0000000) >> 24)
+#define TARGET(id) (((id) & 0x0F000000) >> 24)
+#define ATTR(id) (((id) & 0x00FF0000) >> 16)
+
+static int __init mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
+ u32 base, u32 size,
+ u8 target, u8 attr)
+{
+ if (!mvebu_mbus_window_conflicts(mbus, base, size, target, attr)) {
+ pr_err("cannot add window '%04x:%04x', conflicts with another window\n",
+ target, attr);
+ return -EBUSY;
+ }
+
+ if (mvebu_mbus_alloc_window(mbus, base, size, MVEBU_MBUS_NO_REMAP,
+ target, attr)) {
+ pr_err("cannot add window '%04x:%04x', too many windows\n",
+ target, attr);
return -ENOMEM;
}
+ return 0;
+}
- if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"))
- mbus->hw_io_coherency = 1;
+static int __init
+mbus_parse_ranges(struct device_node *node,
+ int *addr_cells, int *c_addr_cells, int *c_size_cells,
+ int *cell_count, const __be32 **ranges_start,
+ const __be32 **ranges_end)
+{
+ const __be32 *prop;
+ int ranges_len, tuple_len;
+
+ /* Allow a node with no 'ranges' property */
+ *ranges_start = of_get_property(node, "ranges", &ranges_len);
+ if (*ranges_start == NULL) {
+ *addr_cells = *c_addr_cells = *c_size_cells = *cell_count = 0;
+ *ranges_start = *ranges_end = NULL;
+ return 0;
+ }
+ *ranges_end = *ranges_start + ranges_len / sizeof(__be32);
- for (win = 0; win < mbus->soc->num_wins; win++)
- mvebu_mbus_disable_window(mbus, win);
+ *addr_cells = of_n_addr_cells(node);
- mbus->soc->setup_cpu_target(mbus);
+ prop = of_get_property(node, "#address-cells", NULL);
+ *c_addr_cells = be32_to_cpup(prop);
+
+ prop = of_get_property(node, "#size-cells", NULL);
+ *c_size_cells = be32_to_cpup(prop);
+
+ *cell_count = *addr_cells + *c_addr_cells + *c_size_cells;
+ tuple_len = (*cell_count) * sizeof(__be32);
+
+ if (ranges_len % tuple_len) {
+ pr_warn("malformed ranges entry '%s'\n", node->name);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int __init mbus_dt_setup(struct mvebu_mbus_state *mbus,
+ struct device_node *np)
+{
+ int addr_cells, c_addr_cells, c_size_cells;
+ int i, ret, cell_count;
+ const __be32 *r, *ranges_start, *ranges_end;
+
+ ret = mbus_parse_ranges(np, &addr_cells, &c_addr_cells,
+ &c_size_cells, &cell_count,
+ &ranges_start, &ranges_end);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0, r = ranges_start; r < ranges_end; r += cell_count, i++) {
+ u32 windowid, base, size;
+ u8 target, attr;
+
+ /*
+ * An entry with a non-zero custom field do not
+ * correspond to a static window, so skip it.
+ */
+ windowid = of_read_number(r, 1);
+ if (CUSTOM(windowid))
+ continue;
+
+ target = TARGET(windowid);
+ attr = ATTR(windowid);
+ base = of_read_number(r + c_addr_cells, addr_cells);
+ size = of_read_number(r + c_addr_cells + addr_cells,
+ c_size_cells);
+ ret = mbus_dt_setup_win(mbus, base, size, target, attr);
+ if (ret < 0)
+ return ret;
+ }
return 0;
}
+
+static void __init mvebu_mbus_get_pcie_resources(struct device_node *np,
+ struct resource *mem,
+ struct resource *io)
+{
+ u32 reg[2];
+ int ret;
+
+ /*
+ * These are optional, so we clear them and they'll
+ * be zero if they are missing from the DT.
+ */
+ memset(mem, 0, sizeof(struct resource));
+ memset(io, 0, sizeof(struct resource));
+
+ ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg));
+ if (!ret) {
+ mem->start = reg[0];
+ mem->end = mem->start + reg[1];
+ mem->flags = IORESOURCE_MEM;
+ }
+
+ ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg));
+ if (!ret) {
+ io->start = reg[0];
+ io->end = io->start + reg[1];
+ io->flags = IORESOURCE_IO;
+ }
+}
+
+int __init mvebu_mbus_dt_init(void)
+{
+ struct resource mbuswins_res, sdramwins_res;
+ struct device_node *np, *controller;
+ const struct of_device_id *of_id;
+ const __be32 *prop;
+ int ret;
+
+ np = of_find_matching_node(NULL, of_mvebu_mbus_ids);
+ if (!np) {
+ pr_err("could not find a matching SoC family\n");
+ return -ENODEV;
+ }
+
+ of_id = of_match_node(of_mvebu_mbus_ids, np);
+ mbus_state.soc = of_id->data;
+
+ prop = of_get_property(np, "controller", NULL);
+ if (!prop) {
+ pr_err("required 'controller' property missing\n");
+ return -EINVAL;
+ }
+
+ controller = of_find_node_by_phandle(be32_to_cpup(prop));
+ if (!controller) {
+ pr_err("could not find an 'mbus-controller' node\n");
+ return -ENODEV;
+ }
+
+ if (of_address_to_resource(controller, 0, &mbuswins_res)) {
+ pr_err("cannot get MBUS register address\n");
+ return -EINVAL;
+ }
+
+ if (of_address_to_resource(controller, 1, &sdramwins_res)) {
+ pr_err("cannot get SDRAM register address\n");
+ return -EINVAL;
+ }
+
+ /* Get optional pcie-{mem,io}-aperture properties */
+ mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture,
+ &mbus_state.pcie_io_aperture);
+
+ ret = mvebu_mbus_common_init(&mbus_state,
+ mbuswins_res.start,
+ resource_size(&mbuswins_res),
+ sdramwins_res.start,
+ resource_size(&sdramwins_res));
+ if (ret)
+ return ret;
+
+ /* Setup statically declared windows in the DT */
+ return mbus_dt_setup(&mbus_state, np);
+}
+#endif
projects / ~andy / linux / blobdiff