diff options
Diffstat (limited to 'sys/arm64/freescale/imx/imx_ccm.c')
| -rw-r--r-- | sys/arm64/freescale/imx/imx_ccm.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/sys/arm64/freescale/imx/imx_ccm.c b/sys/arm64/freescale/imx/imx_ccm.c new file mode 100644 index 000000000000..a5660c5d0a5d --- /dev/null +++ b/sys/arm64/freescale/imx/imx_ccm.c @@ -0,0 +1,237 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2020 Oleksandr Tymoshenko <gonzo@FreeBSD.org> + * Copyright (c) 2024 The FreeBSD Foundation + * + * Portions of this software were developed by Tom Jones <thj@freebsd.org> + * under sponsorship from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +/* + * Clock Control Module driver for Freescale i.MX 8M SoC family. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/bus.h> +#include <sys/rman.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> + +#include <arm64/freescale/imx/imx_ccm.h> +#include <arm64/freescale/imx/clk/imx_clk_gate.h> +#include <arm64/freescale/imx/clk/imx_clk_mux.h> +#include <arm64/freescale/imx/clk/imx_clk_composite.h> +#include <arm64/freescale/imx/clk/imx_clk_sscg_pll.h> +#include <arm64/freescale/imx/clk/imx_clk_frac_pll.h> + +#include "clkdev_if.h" + +static inline uint32_t +CCU_READ4(struct imx_ccm_softc *sc, bus_size_t off) +{ + + return (bus_read_4(sc->mem_res, off)); +} + +static inline void +CCU_WRITE4(struct imx_ccm_softc *sc, bus_size_t off, uint32_t val) +{ + + bus_write_4(sc->mem_res, off, val); +} + +int +imx_ccm_detach(device_t dev) +{ + struct imx_ccm_softc *sc; + + sc = device_get_softc(dev); + + if (sc->mem_res != NULL) + bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); + + return (0); +} + +int +imx_ccm_attach(device_t dev) +{ + struct imx_ccm_softc *sc; + int err, rid; + phandle_t node; + int i; + + sc = device_get_softc(dev); + sc->dev = dev; + err = 0; + + /* Allocate bus_space resources. */ + rid = 0; + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (sc->mem_res == NULL) { + device_printf(dev, "Cannot allocate memory resources\n"); + err = ENXIO; + goto out; + } + + mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF); + + sc->clkdom = clkdom_create(dev); + if (sc->clkdom == NULL) + panic("Cannot create clkdom\n"); + + for (i = 0; i < sc->nclks; i++) { + switch (sc->clks[i].type) { + case IMX_CLK_UNDEFINED: + break; + case IMX_CLK_LINK: + clknode_link_register(sc->clkdom, + sc->clks[i].clk.link); + break; + case IMX_CLK_FIXED: + clknode_fixed_register(sc->clkdom, + sc->clks[i].clk.fixed); + break; + case IMX_CLK_MUX: + imx_clk_mux_register(sc->clkdom, sc->clks[i].clk.mux); + break; + case IMX_CLK_GATE: + imx_clk_gate_register(sc->clkdom, sc->clks[i].clk.gate); + break; + case IMX_CLK_COMPOSITE: + imx_clk_composite_register(sc->clkdom, sc->clks[i].clk.composite); + break; + case IMX_CLK_SSCG_PLL: + imx_clk_sscg_pll_register(sc->clkdom, sc->clks[i].clk.sscg_pll); + break; + case IMX_CLK_FRAC_PLL: + imx_clk_frac_pll_register(sc->clkdom, sc->clks[i].clk.frac_pll); + break; + case IMX_CLK_DIV: + clknode_div_register(sc->clkdom, sc->clks[i].clk.div); + break; + default: + device_printf(dev, "Unknown clock type %d\n", sc->clks[i].type); + return (ENXIO); + } + } + + if (clkdom_finit(sc->clkdom) != 0) + panic("cannot finalize clkdom initialization\n"); + + if (bootverbose) + clkdom_dump(sc->clkdom); + + node = ofw_bus_get_node(dev); + clk_set_assigned(dev, node); + + err = 0; + +out: + + if (err != 0) + imx_ccm_detach(dev); + + return (err); +} + +static int +imx_ccm_write_4(device_t dev, bus_addr_t addr, uint32_t val) +{ + struct imx_ccm_softc *sc; + + sc = device_get_softc(dev); + CCU_WRITE4(sc, addr, val); + return (0); +} + +static int +imx_ccm_read_4(device_t dev, bus_addr_t addr, uint32_t *val) +{ + struct imx_ccm_softc *sc; + + sc = device_get_softc(dev); + + *val = CCU_READ4(sc, addr); + return (0); +} + +static int +imx_ccm_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set) +{ + struct imx_ccm_softc *sc; + uint32_t reg; + + sc = device_get_softc(dev); + + reg = CCU_READ4(sc, addr); + reg &= ~clr; + reg |= set; + CCU_WRITE4(sc, addr, reg); + + return (0); +} + +static void +imx_ccm_device_lock(device_t dev) +{ + struct imx_ccm_softc *sc; + + sc = device_get_softc(dev); + mtx_lock(&sc->mtx); +} + +static void +imx_ccm_device_unlock(device_t dev) +{ + struct imx_ccm_softc *sc; + + sc = device_get_softc(dev); + mtx_unlock(&sc->mtx); +} + +static device_method_t imx_ccm_methods[] = { + /* clkdev interface */ + DEVMETHOD(clkdev_write_4, imx_ccm_write_4), + DEVMETHOD(clkdev_read_4, imx_ccm_read_4), + DEVMETHOD(clkdev_modify_4, imx_ccm_modify_4), + DEVMETHOD(clkdev_device_lock, imx_ccm_device_lock), + DEVMETHOD(clkdev_device_unlock, imx_ccm_device_unlock), + + DEVMETHOD_END +}; + +DEFINE_CLASS_0(imx_ccm, imx_ccm_driver, imx_ccm_methods, + sizeof(struct imx_ccm_softc)); |