Differential D26402 Diff 76919 sys/dev/extres/syscon/syscon_generic.c

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sys/dev/extres/syscon/syscon_generic.c

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#include <sys/kernel.h>		#include <sys/kernel.h>
#include <sys/lock.h>		#include <sys/lock.h>
#include <sys/module.h>		#include <sys/module.h>
#include <sys/mutex.h>		#include <sys/mutex.h>
#include <sys/rman.h>		#include <sys/rman.h>

#include <machine/bus.h>		#include <machine/bus.h>

		#include <dev/fdt/simplebus.h>

#include <dev/ofw/ofw_bus.h>		#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>		#include <dev/ofw/ofw_bus_subr.h>

#include "syscon_if.h"		#include "syscon_if.h"
#include "syscon.h"		#include "syscon.h"
#include "syscon_generic.h"		#include "syscon_generic.h"
		#include "clkdev_if.h"

MALLOC_DECLARE(M_SYSCON);		MALLOC_DECLARE(M_SYSCON);

static uint32_t syscon_generic_read_4(struct syscon *syscon, bus_size_t offset);		static uint32_t syscon_generic_read_4(struct syscon *syscon, bus_size_t offset);
static int syscon_generic_write_4(struct syscon *syscon, bus_size_t offset,		static int syscon_generic_write_4(struct syscon *syscon, bus_size_t offset,
uint32_t val);		uint32_t val);
static int syscon_generic_modify_4(struct syscon *syscon, bus_size_t offset,		static int syscon_generic_modify_4(struct syscon *syscon, bus_size_t offset,
uint32_t clear_bits, uint32_t set_bits);		uint32_t clear_bits, uint32_t set_bits);
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#define SYSCON_LOCK(_sc) mtx_lock_spin(&(_sc)->mtx)		#define SYSCON_LOCK(_sc) mtx_lock_spin(&(_sc)->mtx)
#define SYSCON_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->mtx)		#define SYSCON_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->mtx)
#define SYSCON_LOCK_INIT(_sc) mtx_init(&(_sc)->mtx, \		#define SYSCON_LOCK_INIT(_sc) mtx_init(&(_sc)->mtx, \
device_get_nameunit((_sc)->dev), "syscon", MTX_SPIN)		device_get_nameunit((_sc)->dev), "syscon", MTX_SPIN)
#define SYSCON_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->mtx);		#define SYSCON_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->mtx);
#define SYSCON_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_OWNED);		#define SYSCON_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_OWNED);
#define SYSCON_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_NOTOWNED);		#define SYSCON_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_NOTOWNED);

static syscon_method_t syscon_generic_methods[] = {		static syscon_method_t syscon_generic_syscon_methods[] = {
SYSCONMETHOD(syscon_read_4, syscon_generic_read_4),		SYSCONMETHOD(syscon_read_4, syscon_generic_read_4),
SYSCONMETHOD(syscon_write_4, syscon_generic_write_4),		SYSCONMETHOD(syscon_write_4, syscon_generic_write_4),
SYSCONMETHOD(syscon_modify_4, syscon_generic_modify_4),		SYSCONMETHOD(syscon_modify_4, syscon_generic_modify_4),

SYSCONMETHOD_END		SYSCONMETHOD_END
};		};
DEFINE_CLASS_1(syscon_generic, syscon_generic_class, syscon_generic_methods,		DEFINE_CLASS_1(syscon_generic_syscon, syscon_generic_syscon_class, syscon_generic_syscon_methods,
0, syscon_class);		0, syscon_class);

static uint32_t		static uint32_t
syscon_generic_read_4(struct syscon *syscon, bus_size_t offset)		syscon_generic_read_4(struct syscon *syscon, bus_size_t offset)
{		{
struct syscon_generic_softc *sc;		struct syscon_generic_softc *sc;
uint32_t val;		uint32_t val;

▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines	if (!ofw_bus_status_okay(dev))
return (ENXIO);		return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)		if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);		return (ENXIO);

device_set_desc(dev, "syscon");		device_set_desc(dev, "syscon");
if (!bootverbose)		if (!bootverbose)
device_quiet(dev);		device_quiet(dev);

		if (ofw_bus_is_compatible(dev, "simple-bus"))
		return (BUS_PROBE_DEFAULT);
return (BUS_PROBE_GENERIC);		return (BUS_PROBE_GENERIC);
}		}

static int		static int
syscon_generic_attach(device_t dev)		syscon_generic_attach(device_t dev)
{		{
struct syscon_generic_softc *sc;		struct syscon_generic_softc *sc;
int rid;		int rid;
		phandle_t node, child;
		device_t cdev;

sc = device_get_softc(dev);		sc = device_get_softc(dev);
sc->dev = dev;		sc->dev = dev;
rid = 0;		rid = 0;

sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,		sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);		RF_ACTIVE);
if (sc->mem_res == NULL) {		if (sc->mem_res == NULL) {
device_printf(dev, "Cannot allocate memory resource\n");		device_printf(dev, "Cannot allocate memory resource\n");
return (ENXIO);		return (ENXIO);
}		}

SYSCON_LOCK_INIT(sc);		SYSCON_LOCK_INIT(sc);
sc->syscon = syscon_create_ofw_node(dev, &syscon_generic_class,		node = ofw_bus_get_node(sc->dev);
ofw_bus_get_node(dev));		sc->syscon = syscon_create_ofw_node(dev, &syscon_generic_syscon_class,
		node);
if (sc->syscon == NULL) {		if (sc->syscon == NULL) {
device_printf(dev, "Failed to create/register syscon\n");		device_printf(dev, "Failed to create/register syscon\n");
return (ENXIO);		return (ENXIO);
}		}

		if (ofw_bus_is_compatible(dev, "simple-bus")) {
		simplebus_init(sc->dev, node);
		mmelUnsubmitted Not Done Inline Actions simplebus_attach is public function and should be used here. mmel: simplebus_attach is public function and should be used here.

		for (child = OF_child(node); child != 0; child = OF_peer(child)) {
		cdev = simplebus_add_device(sc->dev, child, 0, NULL, -1, NULL);
		if (cdev != NULL)
		device_probe_and_attach(cdev);
		}
		}

return (0);		return (0);
}		}

static int		static int
syscon_generic_detach(device_t dev)		syscon_generic_detach(device_t dev)
{		{
struct syscon_generic_softc *sc;		struct syscon_generic_softc *sc;

sc = device_get_softc(dev);		sc = device_get_softc(dev);
if (sc->syscon != NULL) {		if (sc->syscon != NULL) {
syscon_unregister(sc->syscon);		syscon_unregister(sc->syscon);
free(sc->syscon, M_SYSCON);		free(sc->syscon, M_SYSCON);
}		}

		/* Memory allocated in simplebus_init */
		mmelUnsubmitted Not Done Inline Actions simplebus_detach() should be declared public and should be called from here mmel: simplebus_detach() should be declared public and should be called from here
		if (sc->sc_simplebus.ranges != NULL)
		free(sc->sc_simplebus.ranges, M_DEVBUF);

SYSCON_LOCK_DESTROY(sc);		SYSCON_LOCK_DESTROY(sc);

if (sc->mem_res != NULL)		if (sc->mem_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
return (0);		return (0);
}		}

		/* clkdev interface */
		mmelUnsubmitted Not Done Inline Actions This clock interface is not common and thus cannot be added into common (universal) driver mmel: This clock interface is not common and thus cannot be added into common (universal) driver
		static int
		syscon_generic_clk_write_4(device_t dev, bus_addr_t offset, uint32_t val)
		{
		struct syscon_generic_softc *sc;

		sc = device_get_softc(dev);
		bus_write_4(sc->mem_res, offset, val);
		return (0);
		}

		static int
		syscon_generic_clk_read_4(device_t dev, bus_addr_t offset, uint32_t *val)
		{
		struct syscon_generic_softc *sc;

		sc = device_get_softc(dev);

		*val = bus_read_4(sc->mem_res, offset);
		return (0);
		}

		static int
		syscon_generic_clk_modify_4(device_t dev, bus_addr_t offset, uint32_t clear_bits, uint32_t set_bits)
		{
		struct syscon_generic_softc *sc;
		uint32_t val;

		sc = device_get_softc(dev);

		val = bus_read_4(sc->mem_res, offset);
		val &= ~clear_bits;
		val \|= set_bits;
		bus_write_4(sc->mem_res, offset, val);

		return (0);
		}

		static void
		syscon_generic_clk_device_lock(device_t dev)
		{
		struct syscon_generic_softc *sc;

		sc = device_get_softc(dev);
		SYSCON_LOCK(sc);
		}

		static void
		syscon_generic_clk_device_unlock(device_t dev)
		{
		struct syscon_generic_softc *sc;

		sc = device_get_softc(dev);
		SYSCON_UNLOCK(sc);
		}

static device_method_t syscon_generic_dmethods[] = {		static device_method_t syscon_generic_dmethods[] = {
/* Device interface */		/* Device interface */
DEVMETHOD(device_probe, syscon_generic_probe),		DEVMETHOD(device_probe, syscon_generic_probe),
DEVMETHOD(device_attach, syscon_generic_attach),		DEVMETHOD(device_attach, syscon_generic_attach),
DEVMETHOD(device_detach, syscon_generic_detach),		DEVMETHOD(device_detach, syscon_generic_detach),

		/* clkdev interface */
		DEVMETHOD(clkdev_write_4, syscon_generic_clk_write_4),
		DEVMETHOD(clkdev_read_4, syscon_generic_clk_read_4),
		DEVMETHOD(clkdev_modify_4, syscon_generic_clk_modify_4),
		DEVMETHOD(clkdev_device_lock, syscon_generic_clk_device_lock),
		DEVMETHOD(clkdev_device_unlock, syscon_generic_clk_device_unlock),

DEVMETHOD_END		DEVMETHOD_END
};		};

DEFINE_CLASS_0(syscon_generic, syscon_generic_driver, syscon_generic_dmethods,		DEFINE_CLASS_1(syscon_generic, syscon_generic_driver, syscon_generic_dmethods,
sizeof(struct syscon_generic_softc));		sizeof(struct syscon_generic_softc), simplebus_driver);
static devclass_t syscon_generic_devclass;		static devclass_t syscon_generic_devclass;

EARLY_DRIVER_MODULE(syscon_generic, simplebus, syscon_generic_driver,		EARLY_DRIVER_MODULE(syscon_generic, simplebus, syscon_generic_driver,
syscon_generic_devclass, 0, 0, BUS_PASS_DEFAULT);		syscon_generic_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
MODULE_VERSION(syscon_generic, 1);		MODULE_VERSION(syscon_generic, 1);