Differential D27889 Diff 83333 sys/arm/ti/ti_scm_syscon.c

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sys/arm/ti/ti_scm_syscon.c

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	* $FreeBSD$			* $FreeBSD$
	*/			*/
	/* Based on sys/arm/ti/ti_sysc.c */			/* Based on sys/arm/ti/ti_sysc.c */

	#include <sys/cdefs.h>			#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");			__FBSDID("$FreeBSD$");

	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/systm.h>			#include <sys/bus.h>
	#include <sys/kernel.h>			#include <sys/kernel.h>
	#include <sys/module.h>			#include <sys/module.h>
	#include <sys/bus.h>
	#include <sys/resource.h>
	#include <sys/rman.h>
	#include <sys/lock.h>
	#include <sys/mutex.h>			#include <sys/mutex.h>
				#include <sys/rman.h>

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

	#include <dev/fdt/simplebus.h>

	#include <dev/ofw/openfirm.h>			#include <dev/ofw/openfirm.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 <dev/extres/syscon/syscon.h>			#include <dev/extres/syscon/syscon.h>
	#include "clkdev_if.h"			#include <dev/extres/syscon/syscon_generic.h>

	#include <arm/ti/ti_cpuid.h>			#include <arm/ti/ti_cpuid.h>

				#include "syscon_if.h"

	#if 0			#if 0
	#define DPRINTF(dev, msg...) device_printf(dev, msg)			#define DPRINTF(dev, msg...) device_printf(dev, msg)
	#else			#else
	#define DPRINTF(dev, msg...)			#define DPRINTF(dev, msg...)
	#endif			#endif

	MALLOC_DECLARE(M_SYSCON);

	struct ti_scm_syscon_softc {
	struct simplebus_softc sc_simplebus;
	device_t dev;
	struct syscon * syscon;
	struct resource * res[1];
	bus_space_tag_t bst;
	bus_space_handle_t bsh;
	struct mtx mtx;
	};

	static struct resource_spec ti_scm_syscon_res_spec[] = {
	{ SYS_RES_MEMORY, 0, RF_ACTIVE \| RF_SHAREABLE },
	{ -1, 0 }
	};

	/* Device */
	static struct ofw_compat_data compat_data[] = {
	{ "syscon", 1 },
	{ NULL, 0 }
	};

	/* --- dev/extres/syscon syscon_method_t interface --- */
	static int
	ti_scm_syscon_write_4(struct syscon *syscon, bus_size_t offset, uint32_t val)
	{
	struct ti_scm_syscon_softc *sc;

	sc = device_get_softc(syscon->pdev);
	DPRINTF(sc->dev, "offset=%lx write %x\n", offset, val);
	mtx_lock(&sc->mtx);
	bus_space_write_4(sc->bst, sc->bsh, offset, val);
	mtx_unlock(&sc->mtx);
	return (0);
	}

	static uint32_t
	ti_scm_syscon_read_4(struct syscon *syscon, bus_size_t offset)
	{
	struct ti_scm_syscon_softc *sc;
	uint32_t val;

	sc = device_get_softc(syscon->pdev);

	mtx_lock(&sc->mtx);
	val = bus_space_read_4(sc->bst, sc->bsh, offset);
	mtx_unlock(&sc->mtx);
	DPRINTF(sc->dev, "offset=%lx Read %x\n", offset, val);
	return (val);
	}
	static int
	ti_scm_syscon_modify_4(struct syscon *syscon, bus_size_t offset, uint32_t clr, uint32_t set)
	{
	struct ti_scm_syscon_softc *sc;
	uint32_t reg;

	sc = device_get_softc(syscon->pdev);

	mtx_lock(&sc->mtx);
	reg = bus_space_read_4(sc->bst, sc->bsh, offset);
	reg &= ~clr;
	reg \|= set;
	bus_space_write_4(sc->bst, sc->bsh, offset, reg);
	mtx_unlock(&sc->mtx);
	DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", offset, reg, clr, set);

	return (0);
	}

	static syscon_method_t ti_scm_syscon_reg_methods[] = {
	SYSCONMETHOD(syscon_read_4, ti_scm_syscon_read_4),
	SYSCONMETHOD(syscon_write_4, ti_scm_syscon_write_4),
	SYSCONMETHOD(syscon_modify_4, ti_scm_syscon_modify_4),

	SYSCONMETHOD_END
	};

	DEFINE_CLASS_1(ti_scm_syscon_reg, ti_scm_syscon_reg_class, ti_scm_syscon_reg_methods,
	0, syscon_class);

	/* device interface */			/* device interface */
	static int			static int
	ti_scm_syscon_probe(device_t dev)			ti_scm_syscon_probe(device_t dev)
	{			{
				const char *name;
	if (!ofw_bus_status_okay(dev))			if (!ofw_bus_status_okay(dev))
	return (ENXIO);			return (ENXIO);

	if (!ti_soc_is_supported())			if (!ti_soc_is_supported())
	return (ENXIO);			return (ENXIO);

	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)			/* Need to be both "syscon" and "simple-bus" */
				if (ofw_bus_is_compatible(dev, "syscon") == 0 \|\|
				ofw_bus_is_compatible(dev, "simple-bus") == 0)
	return (ENXIO);			return (ENXIO);

				/* Require the node are named scm_conf@0 */
				name = ofw_bus_get_name(dev);
				if (name == NULL \|\| strcmp(name, "scm_conf@0") != 0)
				return (ENXIO);

	device_set_desc(dev, "TI OMAP Control Module Syscon");			device_set_desc(dev, "TI OMAP Control Module Syscon");
	return(BUS_PROBE_DEFAULT);			return(BUS_PROBE_DEFAULT);
	}			}

	static int			static int
	ti_scm_syscon_attach(device_t dev)
	{
	struct ti_scm_syscon_softc *sc;
	phandle_t node, child;
	int err;

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

	if (bus_alloc_resources(dev, ti_scm_syscon_res_spec, sc->res)) {
	device_printf(sc->dev, "Cant allocate resources\n");
	return (ENXIO);
	}

	sc->dev = dev;
	sc->bst = rman_get_bustag(sc->res[0]);
	sc->bsh = rman_get_bushandle(sc->res[0]);

	mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF);
	node = ofw_bus_get_node(sc->dev);

	/* dev/extres/syscon interface */
	sc->syscon = syscon_create_ofw_node(dev, &ti_scm_syscon_reg_class, node);
	if (sc->syscon == NULL) {
	device_printf(dev, "Failed to create/register syscon\n");
	return (ENXIO);
	}

	simplebus_init(sc->dev, node);

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

	return (bus_generic_attach(sc->dev));
	}

	/* syscon interface */
	static int
	ti_scm_syscon_get_handle(device_t dev, struct syscon **syscon)			ti_scm_syscon_get_handle(device_t dev, struct syscon **syscon)
	{			{
	struct ti_scm_syscon_softc *sc;			struct syscon_generic_softc *sc;

	sc = device_get_softc(dev);			sc = device_get_softc(dev);
	*syscon = sc->syscon;			*syscon = sc->syscon;
	if (*syscon == NULL)			if (*syscon == NULL)
	return (ENODEV);			return (ENODEV);
	return (0);			return (0);
	}			}

	/* clkdev interface */
	static int
	ti_scm_syscon_clk_write_4(device_t dev, bus_addr_t addr, uint32_t val)
	{
	struct ti_scm_syscon_softc *sc;

	sc = device_get_softc(dev);
	DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val);
	bus_space_write_4(sc->bst, sc->bsh, addr, val);
	return (0);
	}

	static int
	ti_scm_syscon_clk_read_4(device_t dev, bus_addr_t addr, uint32_t *val)
	{
	struct ti_scm_syscon_softc *sc;

	sc = device_get_softc(dev);

	*val = bus_space_read_4(sc->bst, sc->bsh, addr);
	DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, *val);
	return (0);
	}

	static int
	ti_scm_syscon_clk_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set)
	{
	struct ti_scm_syscon_softc *sc;
	uint32_t reg;

	sc = device_get_softc(dev);

	reg = bus_space_read_4(sc->bst, sc->bsh, addr);
	reg &= ~clr;
	reg \|= set;
	bus_space_write_4(sc->bst, sc->bsh, addr, reg);
	DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", addr, reg, clr, set);

	return (0);
	}

	static void
	ti_scm_syscon_clk_device_lock(device_t dev)
	{
	struct ti_scm_syscon_softc *sc;

	sc = device_get_softc(dev);
	mtx_lock(&sc->mtx);
	}

	static void
	ti_scm_syscon_clk_device_unlock(device_t dev)
	{
	struct ti_scm_syscon_softc *sc;
	sc = device_get_softc(dev);
	mtx_unlock(&sc->mtx);
	}

	static device_method_t ti_scm_syscon_methods[] = {			static device_method_t ti_scm_syscon_methods[] = {
	DEVMETHOD(device_probe, ti_scm_syscon_probe),			DEVMETHOD(device_probe, ti_scm_syscon_probe),
	DEVMETHOD(device_attach, ti_scm_syscon_attach),

	/* syscon interface */
	DEVMETHOD(syscon_get_handle, ti_scm_syscon_get_handle),			DEVMETHOD(syscon_get_handle, ti_scm_syscon_get_handle),

	/* clkdev interface */
	DEVMETHOD(clkdev_write_4, ti_scm_syscon_clk_write_4),
	DEVMETHOD(clkdev_read_4, ti_scm_syscon_clk_read_4),
	DEVMETHOD(clkdev_modify_4, ti_scm_syscon_clk_modify_4),
	DEVMETHOD(clkdev_device_lock, ti_scm_syscon_clk_device_lock),
	DEVMETHOD(clkdev_device_unlock, ti_scm_syscon_clk_device_unlock),

	DEVMETHOD_END			DEVMETHOD_END
	};			};

	DEFINE_CLASS_1(ti_scm_syscon, ti_scm_syscon_driver, ti_scm_syscon_methods,			DEFINE_CLASS_1(ti_scm_syscon, ti_scm_syscon_driver, ti_scm_syscon_methods,
	sizeof(struct ti_scm_syscon_softc), simplebus_driver);			sizeof(struct syscon_generic_softc), syscon_generic_driver);

	static devclass_t ti_scm_syscon_devclass;			static devclass_t ti_scm_syscon_devclass;

				/* ti_scm_syscon needs to attach "as soon as posible" due to it has clocks */
	EARLY_DRIVER_MODULE(ti_scm_syscon, simplebus, ti_scm_syscon_driver,			EARLY_DRIVER_MODULE(ti_scm_syscon, simplebus, ti_scm_syscon_driver,
	ti_scm_syscon_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);			ti_scm_syscon_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
	MODULE_VERSION(ti_scm_syscon, 1);			MODULE_VERSION(ti_scm_syscon, 1);
	MODULE_DEPEND(ti_scm_syscon, ti_scm, 1, 1, 1);			MODULE_DEPEND(ti_scm_syscon, ti_scm, 1, 1, 1);