#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include "glue.h"
#define EIC7700_HSP_BUS_FILTER_EN BIT(0)
#define EIC7700_HSP_BUS_CLKEN_GM BIT(9)
#define EIC7700_HSP_BUS_CLKEN_GS BIT(16)
#define EIC7700_HSP_AXI_LP_XM_CSYSREQ BIT(0)
#define EIC7700_HSP_AXI_LP_XS_CSYSREQ BIT(16)
struct dwc3_generic {
struct device *dev;
struct dwc3 dwc;
struct clk_bulk_data *clks;
int num_clocks;
struct reset_control *resets;
};
struct dwc3_generic_config {
int (*init)(struct dwc3_generic *dwc3g);
struct dwc3_properties properties;
};
#define to_dwc3_generic(d) container_of((d), struct dwc3_generic, dwc)
static void dwc3_generic_reset_control_assert(void *data)
{
reset_control_assert(data);
}
static int dwc3_eic7700_init(struct dwc3_generic *dwc3g)
{
struct device *dev = dwc3g->dev;
struct regmap *regmap;
u32 hsp_usb_axi_lp;
u32 hsp_usb_bus;
u32 args[2];
u32 val;
regmap = syscon_regmap_lookup_by_phandle_args(dev->of_node,
"eswin,hsp-sp-csr",
ARRAY_SIZE(args), args);
if (IS_ERR(regmap)) {
dev_err(dev, "No hsp-sp-csr phandle specified\n");
return PTR_ERR(regmap);
}
hsp_usb_bus = args[0];
hsp_usb_axi_lp = args[1];
regmap_read(regmap, hsp_usb_bus, &val);
regmap_write(regmap, hsp_usb_bus, val | EIC7700_HSP_BUS_FILTER_EN |
EIC7700_HSP_BUS_CLKEN_GM | EIC7700_HSP_BUS_CLKEN_GS);
regmap_write(regmap, hsp_usb_axi_lp, EIC7700_HSP_AXI_LP_XM_CSYSREQ |
EIC7700_HSP_AXI_LP_XS_CSYSREQ);
return 0;
}
static int dwc3_generic_probe(struct platform_device *pdev)
{
const struct dwc3_generic_config *plat_config;
struct dwc3_probe_data probe_data = {};
struct device *dev = &pdev->dev;
struct dwc3_generic *dwc3g;
struct resource *res;
int ret;
dwc3g = devm_kzalloc(dev, sizeof(*dwc3g), GFP_KERNEL);
if (!dwc3g)
return -ENOMEM;
dwc3g->dev = dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "missing memory resource\n");
return -ENODEV;
}
dwc3g->resets = devm_reset_control_array_get_optional_exclusive(dev);
if (IS_ERR(dwc3g->resets))
return dev_err_probe(dev, PTR_ERR(dwc3g->resets), "failed to get resets\n");
ret = reset_control_assert(dwc3g->resets);
if (ret)
return dev_err_probe(dev, ret, "failed to assert resets\n");
udelay(2);
ret = reset_control_deassert(dwc3g->resets);
if (ret)
return dev_err_probe(dev, ret, "failed to deassert resets\n");
ret = devm_add_action_or_reset(dev, dwc3_generic_reset_control_assert, dwc3g->resets);
if (ret)
return ret;
ret = devm_clk_bulk_get_all_enabled(dwc3g->dev, &dwc3g->clks);
if (ret < 0)
return dev_err_probe(dev, ret, "failed to get clocks\n");
dwc3g->num_clocks = ret;
dwc3g->dwc.dev = dev;
probe_data.dwc = &dwc3g->dwc;
probe_data.res = res;
probe_data.ignore_clocks_and_resets = true;
plat_config = of_device_get_match_data(dev);
if (!plat_config) {
probe_data.properties = DWC3_DEFAULT_PROPERTIES;
goto core_probe;
}
probe_data.properties = plat_config->properties;
if (plat_config->init) {
ret = plat_config->init(dwc3g);
if (ret)
return dev_err_probe(dev, ret,
"failed to init platform\n");
}
core_probe:
ret = dwc3_core_probe(&probe_data);
if (ret)
return dev_err_probe(dev, ret, "failed to register DWC3 Core\n");
return 0;
}
static void dwc3_generic_remove(struct platform_device *pdev)
{
struct dwc3 *dwc = platform_get_drvdata(pdev);
dwc3_core_remove(dwc);
}
static int dwc3_generic_suspend(struct device *dev)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
struct dwc3_generic *dwc3g = to_dwc3_generic(dwc);
int ret;
ret = dwc3_pm_suspend(dwc);
if (ret)
return ret;
clk_bulk_disable_unprepare(dwc3g->num_clocks, dwc3g->clks);
return 0;
}
static int dwc3_generic_resume(struct device *dev)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
struct dwc3_generic *dwc3g = to_dwc3_generic(dwc);
int ret;
ret = clk_bulk_prepare_enable(dwc3g->num_clocks, dwc3g->clks);
if (ret)
return ret;
ret = dwc3_pm_resume(dwc);
if (ret)
return ret;
return 0;
}
static int dwc3_generic_runtime_suspend(struct device *dev)
{
return dwc3_runtime_suspend(dev_get_drvdata(dev));
}
static int dwc3_generic_runtime_resume(struct device *dev)
{
return dwc3_runtime_resume(dev_get_drvdata(dev));
}
static int dwc3_generic_runtime_idle(struct device *dev)
{
return dwc3_runtime_idle(dev_get_drvdata(dev));
}
static const struct dev_pm_ops dwc3_generic_dev_pm_ops = {
SYSTEM_SLEEP_PM_OPS(dwc3_generic_suspend, dwc3_generic_resume)
RUNTIME_PM_OPS(dwc3_generic_runtime_suspend, dwc3_generic_runtime_resume,
dwc3_generic_runtime_idle)
};
static const struct dwc3_generic_config fsl_ls1028_dwc3 = {
.properties.gsbuscfg0_reqinfo = 0x2222,
};
static const struct dwc3_generic_config eic7700_dwc3 = {
.init = dwc3_eic7700_init,
.properties = DWC3_DEFAULT_PROPERTIES,
};
static const struct of_device_id dwc3_generic_of_match[] = {
{ .compatible = "spacemit,k1-dwc3", },
{ .compatible = "fsl,ls1028a-dwc3", &fsl_ls1028_dwc3},
{ .compatible = "eswin,eic7700-dwc3", &eic7700_dwc3},
{ }
};
MODULE_DEVICE_TABLE(of, dwc3_generic_of_match);
static struct platform_driver dwc3_generic_driver = {
.probe = dwc3_generic_probe,
.remove = dwc3_generic_remove,
.driver = {
.name = "dwc3-generic-plat",
.of_match_table = dwc3_generic_of_match,
.pm = pm_ptr(&dwc3_generic_dev_pm_ops),
},
};
module_platform_driver(dwc3_generic_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DesignWare USB3 generic platform driver");
