int bldr_log_init(void)
{
struct device_node *np;
struct resource temp_res;
int num_reg = 0;
np = of_find_compatible_node(NULL, NULL, RAMLOG_COMPATIBLE_NAME);
if (np) {
if (of_can_translate_address(np)) {
while (of_address_to_resource(np, num_reg, &temp_res) == 0) {
if (!strcmp(temp_res.name, RAMLOG_LAST_RSE_NAME))
bldr_log_setup(temp_res.start, resource_size(&temp_res), true);
else if (!strcmp(temp_res.name, RAMLOG_CUR_RSE_NAME))
bldr_log_setup(temp_res.start, resource_size(&temp_res), false);
else
pr_warn("%s: unknown bldr resource %s\n", __func__, temp_res.name);
num_reg++;
}
if (!num_reg)
pr_warn("%s: can't find address resource\n", __func__);
} else
pr_warn("%s: translate address fail\n", __func__);
} else
pr_warn("%s: can't find compatible '%s'\n", __func__, RAMLOG_COMPATIBLE_NAME);
return num_reg;
}
/**
* of_device_make_bus_id - Use the device node data to assign a unique name
* @dev: pointer to device structure that is linked to a device tree node
*
* This routine will first try using either the dcr-reg or the reg property
* value to derive a unique name. As a last resort it will use the node
* name followed by a unique number.
*/
void of_device_make_bus_id(struct device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->of_node;
const __be32 *reg;
u64 addr;
const __be32 *addrp;
int magic;
#ifdef CONFIG_PPC_DCR
/*
* If it's a DCR based device, use 'd' for native DCRs
* and 'D' for MMIO DCRs.
*/
reg = of_get_property(node, "dcr-reg", NULL);
if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
dev_set_name(dev, "d%x.%s", *reg, node->name);
#else /* CONFIG_PPC_DCR_NATIVE */
u64 addr = of_translate_dcr_address(node, *reg, NULL);
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "D%llx.%s",
(unsigned long long)addr, node->name);
return;
}
#endif /* !CONFIG_PPC_DCR_NATIVE */
}
#endif /* CONFIG_PPC_DCR */
/*
* For MMIO, get the physical address
*/
reg = of_get_property(node, "reg", NULL);
if (reg) {
if (of_can_translate_address(node)) {
addr = of_translate_address(node, reg);
} else {
addrp = of_get_address(node, 0, NULL, NULL);
if (addrp)
addr = of_read_number(addrp, 1);
else
addr = OF_BAD_ADDR;
}
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "%llx.%s",
(unsigned long long)addr, node->name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented
* counter (and pray...)
*/
magic = atomic_add_return(1, &bus_no_reg_magic);
dev_set_name(dev, "%s.%d", node->name, magic - 1);
}
/**
* of_device_alloc - Allocate and initialize an of_device
* @np: device node to assign to device
* @bus_id: Name to assign to the device. May be null to use default name.
* @parent: Parent device.
*/
struct platform_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct platform_device *dev;
int rc, i, num_reg = 0, num_irq;
struct resource *res, temp_res;
dev = platform_device_alloc("", -1);
if (!dev)
return NULL;
/* count the io and irq resources */
if (of_can_translate_address(np))
while (of_address_to_resource(np, num_reg, &temp_res) == 0)
num_reg++;
num_irq = of_irq_count(np);
/* Populate the resource table */
if (num_irq || num_reg) {
res = kzalloc(sizeof(*res) * (num_irq + num_reg), GFP_KERNEL);
if (!res) {
platform_device_put(dev);
return NULL;
}
dev->num_resources = num_reg + num_irq;
dev->resource = res;
for (i = 0; i < num_reg; i++, res++) {
rc = of_address_to_resource(np, i, res);
WARN_ON(rc);
}
WARN_ON(of_irq_to_resource_table(np, res, num_irq) != num_irq);
}
dev->dev.of_node = of_node_get(np);
#if defined(CONFIG_MICROBLAZE)
dev->dev.dma_mask = &dev->archdata.dma_mask;
#endif
dev->dev.parent = parent;
if (bus_id)
dev_set_name(&dev->dev, "%s", bus_id);
else
of_device_make_bus_id(&dev->dev);
return dev;
}
void of_device_make_bus_id(struct device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->of_node;
const u32 *reg;
u64 addr;
const __be32 *addrp;
int magic;
#ifdef CONFIG_PPC_DCR
reg = of_get_property(node, "dcr-reg", NULL);
if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
dev_set_name(dev, "d%x.%s", *reg, node->name);
#else
u64 addr = of_translate_dcr_address(node, *reg, NULL);
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "D%llx.%s",
(unsigned long long)addr, node->name);
return;
}
#endif
}
#endif
reg = of_get_property(node, "reg", NULL);
if (reg) {
if (of_can_translate_address(node)) {
addr = of_translate_address(node, reg);
} else {
addrp = of_get_address(node, 0, NULL, NULL);
if (addrp)
addr = of_read_number(addrp, 1);
else
addr = OF_BAD_ADDR;
}
if (addr != OF_BAD_ADDR) {
dev_set_name(dev, "%llx.%s",
(unsigned long long)addr, node->name);
return;
}
}
magic = atomic_add_return(1, &bus_no_reg_magic);
dev_set_name(dev, "%s.%d", node->name, magic - 1);
}
/**
* of_device_make_bus_id - Use the device node data to assign a unique name
* @dev: pointer to device structure that is linked to a device tree node
*
* This routine will first try using either the dcr-reg or the reg property
* value to derive a unique name. As a last resort it will use the node
* name followed by a unique number.
*/
static void of_device_make_bus_id(struct device_d *dev)
{
static int bus_no_reg_magic;
struct device_node *np = dev->device_node;
const __be32 *reg, *addrp;
u64 addr;
char *name, *at;
name = xstrdup(np->name);
at = strchr(name, '@');
if (at)
*at = '\0';
#ifdef CONFIG_PPC_DCR
/*
* If it's a DCR based device, use 'd' for native DCRs
* and 'D' for MMIO DCRs.
*/
reg = of_get_property(np, "dcr-reg", NULL);
if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
snprintf(dev->name, MAX_DRIVER_NAME, "d%x.%s", *reg, name);
#else /* CONFIG_PPC_DCR_NATIVE */
u64 addr = of_translate_dcr_address(np, *reg, NULL);
if (addr != OF_BAD_ADDR) {
snprintf(dev->name, MAX_DRIVER_NAME, "D%llx.%s",
(unsigned long long)addr, name);
free(name);
return;
}
#endif /* !CONFIG_PPC_DCR_NATIVE */
}
#endif /* CONFIG_PPC_DCR */
/*
* For MMIO, get the physical address
*/
reg = of_get_property(np, "reg", NULL);
if (reg) {
if (of_can_translate_address(np)) {
addr = of_translate_address(np, reg);
} else {
addrp = of_get_address(np, 0, NULL, NULL);
if (addrp)
addr = of_read_number(addrp, 1);
else
addr = OF_BAD_ADDR;
}
if (addr != OF_BAD_ADDR) {
snprintf(dev->name, MAX_DRIVER_NAME, "%llx.%s",
(unsigned long long)addr, name);
free(name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented counter
*/
snprintf(dev->name, MAX_DRIVER_NAME, "%s.%d", name, bus_no_reg_magic++);
free(name);
}
/**
* of_platform_device_create - Alloc, initialize and register an of_device
* @np: pointer to node to create device for
* @parent: device model parent device.
*
* Returns pointer to created platform device, or NULL if a device was not
* registered. Unavailable devices will not get registered.
*/
static struct device_d *of_platform_device_create(struct device_node *np,
struct device_d *parent)
{
struct device_d *dev;
struct resource *res = NULL, temp_res;
int i, j, ret, num_reg = 0, match;
if (!of_device_is_available(np))
return NULL;
/* count the io resources */
if (of_can_translate_address(np))
while (of_address_to_resource(np, num_reg, &temp_res) == 0)
num_reg++;
/* Populate the resource table */
if (num_reg) {
res = xzalloc(sizeof(*res) * num_reg);
for (i = 0; i < num_reg; i++) {
ret = of_address_to_resource(np, i, &res[i]);
if (ret) {
free(res);
return NULL;
}
}
/*
* A device may already be registered as platform_device.
* Instead of registering the same device again, just
* add this node to the existing device.
*/
for_each_device(dev) {
if (!dev->resource)
continue;
for (i = 0, match = 0; i < num_reg; i++)
for (j = 0; j < dev->num_resources; j++)
if (dev->resource[j].start ==
res[i].start &&
dev->resource[j].end ==
res[i].end) {
match++;
break;
}
/* check if all address resources match */
if (match == num_reg) {
debug("connecting %s to %s\n",
np->name, dev_name(dev));
dev->device_node = np;
free(res);
return dev;
}
}
}
/* setup generic device info */
dev = xzalloc(sizeof(*dev));
dev->id = DEVICE_ID_SINGLE;
dev->device_node = np;
dev->parent = parent;
dev->resource = res;
dev->num_resources = num_reg;
of_device_make_bus_id(dev);
debug("%s: register device %s, io=" PRINTF_CONVERSION_RESOURCE "\n",
__func__, dev_name(dev),
(num_reg) ? dev->resource[0].start : (-1));
ret = platform_device_register(dev);
if (!ret)
return dev;
free(dev);
if (num_reg)
free(res);
return NULL;
}