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/*
* Copyright (C) 2014 Magnus Damm
* Copyright (C) 2015 Glider bvba
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#define pr_fmt(fmt) "board_staging: " fmt
#include <linux/clkdev.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include "board.h"
static struct device_node *irqc_node __initdata;
static unsigned int irqc_base __initdata;
static bool find_by_address(u64 base_address)
{
struct device_node *dn = of_find_all_nodes(NULL);
struct resource res;
while (dn) {
if (!of_address_to_resource(dn, 0, &res)) {
if (res.start == base_address) {
of_node_put(dn);
return true;
}
}
dn = of_find_all_nodes(dn);
}
return false;
}
bool __init board_staging_dt_node_available(const struct resource *resource,
unsigned int num_resources)
{
unsigned int i;
for (i = 0; i < num_resources; i++) {
const struct resource *r = resource + i;
if (resource_type(r) == IORESOURCE_MEM)
if (find_by_address(r->start))
return true; /* DT node available */
}
return false; /* Nothing found */
}
int __init board_staging_gic_setup_xlate(const char *gic_match,
unsigned int base)
{
WARN_ON(irqc_node);
irqc_node = of_find_compatible_node(NULL, NULL, gic_match);
WARN_ON(!irqc_node);
if (!irqc_node)
return -ENOENT;
irqc_base = base;
return 0;
}
static void __init gic_fixup_resource(struct resource *res)
{
struct of_phandle_args irq_data;
unsigned int hwirq = res->start;
unsigned int virq;
if (resource_type(res) != IORESOURCE_IRQ || !irqc_node)
return;
irq_data.np = irqc_node;
irq_data.args_count = 3;
irq_data.args[0] = 0;
irq_data.args[1] = hwirq - irqc_base;
switch (res->flags &
(IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE |
IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL)) {
case IORESOURCE_IRQ_LOWEDGE:
irq_data.args[2] = IRQ_TYPE_EDGE_FALLING;
break;
case IORESOURCE_IRQ_HIGHEDGE:
irq_data.args[2] = IRQ_TYPE_EDGE_RISING;
break;
case IORESOURCE_IRQ_LOWLEVEL:
irq_data.args[2] = IRQ_TYPE_LEVEL_LOW;
break;
case IORESOURCE_IRQ_HIGHLEVEL:
default:
irq_data.args[2] = IRQ_TYPE_LEVEL_HIGH;
break;
}
virq = irq_create_of_mapping(&irq_data);
if (WARN_ON(!virq))
return;
pr_debug("hwirq %u -> virq %u\n", hwirq, virq);
res->start = virq;
}
void __init board_staging_gic_fixup_resources(struct resource *res,
unsigned int nres)
{
unsigned int i;
for (i = 0; i < nres; i++)
gic_fixup_resource(&res[i]);
}
int __init board_staging_register_clock(const struct board_staging_clk *bsc)
{
int error;
pr_debug("Aliasing clock %s for con_id %s dev_id %s\n", bsc->clk,
bsc->con_id, bsc->dev_id);
error = clk_add_alias(bsc->con_id, bsc->dev_id, bsc->clk, NULL);
if (error)
pr_err("Failed to alias clock %s (%d)\n", bsc->clk, error);
return error;
}
#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
static int board_staging_add_dev_domain(struct platform_device *pdev,
const char *domain)
{
struct of_phandle_args pd_args;
struct generic_pm_domain *pd;
struct device_node *np;
np = of_find_node_by_path(domain);
if (!np) {
pr_err("Cannot find domain node %s\n", domain);
return -ENOENT;
}
pd_args.np = np;
pd_args.args_count = 0;
pd = of_genpd_get_from_provider(&pd_args);
if (IS_ERR(pd)) {
pr_err("Cannot find genpd %s (%ld)\n", domain, PTR_ERR(pd));
return PTR_ERR(pd);
}
pr_debug("Found genpd %s for device %s\n", pd->name, pdev->name);
return pm_genpd_add_device(pd, &pdev->dev);
}
#else
static inline int board_staging_add_dev_domain(struct platform_device *pdev,
const char *domain)
{
return 0;
}
#endif
int __init board_staging_register_device(const struct board_staging_dev *dev)
{
struct platform_device *pdev = dev->pdev;
unsigned int i;
int error;
pr_debug("Trying to register device %s\n", pdev->name);
if (board_staging_dt_node_available(pdev->resource,
pdev->num_resources)) {
pr_warn("Skipping %s, already in DT\n", pdev->name);
return -EEXIST;
}
board_staging_gic_fixup_resources(pdev->resource, pdev->num_resources);
for (i = 0; i < dev->nclocks; i++)
board_staging_register_clock(&dev->clocks[i]);
if (dev->domain)
board_staging_add_dev_domain(pdev, dev->domain);
error = platform_device_register(pdev);
if (error) {
pr_err("Failed to register device %s (%d)\n", pdev->name,
error);
return error;
}
return error;
}
void __init board_staging_register_devices(const struct board_staging_dev *devs,
unsigned int ndevs)
{
unsigned int i;
for (i = 0; i < ndevs; i++)
board_staging_register_device(&devs[i]);
}
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