diff options
Diffstat (limited to 'freebsd/sys/arm/ti/ti_pinmux.c')
| -rw-r--r-- | freebsd/sys/arm/ti/ti_pinmux.c | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/freebsd/sys/arm/ti/ti_pinmux.c b/freebsd/sys/arm/ti/ti_pinmux.c deleted file mode 100644 index af47d074..00000000 --- a/freebsd/sys/arm/ti/ti_pinmux.c +++ /dev/null @@ -1,463 +0,0 @@ -#include <machine/rtems-bsd-kernel-space.h> - -/* - * Copyright (c) 2010 - * Ben Gray <ben.r.gray@gmail.com>. - * All rights reserved. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Ben Gray. - * 4. The name of the company nor the name of the author may be used to - * endorse or promote products derived from this software without specific - * prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY BEN GRAY ``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 BEN GRAY 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. - */ - -/** - * Exposes pinmux module to pinctrl-compatible interface - */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/bus.h> -#include <rtems/bsd/sys/resource.h> -#include <sys/rman.h> -#include <sys/lock.h> -#include <sys/mutex.h> - -#include <machine/bus.h> -#include <machine/resource.h> - -#include <dev/ofw/openfirm.h> -#include <dev/ofw/ofw_bus.h> -#include <dev/ofw/ofw_bus_subr.h> -#include <dev/fdt/fdt_pinctrl.h> - -#include <arm/ti/omap4/omap4_scm_padconf.h> -#include <arm/ti/am335x/am335x_scm_padconf.h> -#include <arm/ti/ti_cpuid.h> -#include "ti_pinmux.h" - -struct pincfg { - uint32_t reg; - uint32_t conf; -}; - -static struct resource_spec ti_pinmux_res_spec[] = { - { SYS_RES_MEMORY, 0, RF_ACTIVE }, /* Control memory window */ - { -1, 0 } -}; - -static struct ti_pinmux_softc *ti_pinmux_sc; - -#define ti_pinmux_read_2(sc, reg) \ - bus_space_read_2((sc)->sc_bst, (sc)->sc_bsh, (reg)) -#define ti_pinmux_write_2(sc, reg, val) \ - bus_space_write_2((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) -#define ti_pinmux_read_4(sc, reg) \ - bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) -#define ti_pinmux_write_4(sc, reg, val) \ - bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) - - -/** - * ti_padconf_devmap - Array of pins, should be defined one per SoC - * - * This array is typically defined in one of the targeted *_scm_pinumx.c - * files and is specific to the given SoC platform. Each entry in the array - * corresponds to an individual pin. - */ -static const struct ti_pinmux_device *ti_pinmux_dev; - - -/** - * ti_pinmux_padconf_from_name - searches the list of pads and returns entry - * with matching ball name. - * @ballname: the name of the ball - * - * RETURNS: - * A pointer to the matching padconf or NULL if the ball wasn't found. - */ -static const struct ti_pinmux_padconf* -ti_pinmux_padconf_from_name(const char *ballname) -{ - const struct ti_pinmux_padconf *padconf; - - padconf = ti_pinmux_dev->padconf; - while (padconf->ballname != NULL) { - if (strcmp(ballname, padconf->ballname) == 0) - return(padconf); - padconf++; - } - - return (NULL); -} - -/** - * ti_pinmux_padconf_set_internal - sets the muxmode and state for a pad/pin - * @padconf: pointer to the pad structure - * @muxmode: the name of the mode to use for the pin, i.e. "uart1_rx" - * @state: the state to put the pad/pin in, i.e. PADCONF_PIN_??? - * - * - * LOCKING: - * Internally locks it's own context. - * - * RETURNS: - * 0 on success. - * EINVAL if pin requested is outside valid range or already in use. - */ -static int -ti_pinmux_padconf_set_internal(struct ti_pinmux_softc *sc, - const struct ti_pinmux_padconf *padconf, - const char *muxmode, unsigned int state) -{ - unsigned int mode; - uint16_t reg_val; - - /* populate the new value for the PADCONF register */ - reg_val = (uint16_t)(state & ti_pinmux_dev->padconf_sate_mask); - - /* find the new mode requested */ - for (mode = 0; mode < 8; mode++) { - if ((padconf->muxmodes[mode] != NULL) && - (strcmp(padconf->muxmodes[mode], muxmode) == 0)) { - break; - } - } - - /* couldn't find the mux mode */ - if (mode >= 8) { - printf("Invalid mode \"%s\"\n", muxmode); - return (EINVAL); - } - - /* set the mux mode */ - reg_val |= (uint16_t)(mode & ti_pinmux_dev->padconf_muxmode_mask); - - if (bootverbose) - device_printf(sc->sc_dev, "setting internal %x for %s\n", - reg_val, muxmode); - /* write the register value (16-bit writes) */ - ti_pinmux_write_2(sc, padconf->reg_off, reg_val); - - return (0); -} - -/** - * ti_pinmux_padconf_set - sets the muxmode and state for a pad/pin - * @padname: the name of the pad, i.e. "c12" - * @muxmode: the name of the mode to use for the pin, i.e. "uart1_rx" - * @state: the state to put the pad/pin in, i.e. PADCONF_PIN_??? - * - * - * LOCKING: - * Internally locks it's own context. - * - * RETURNS: - * 0 on success. - * EINVAL if pin requested is outside valid range or already in use. - */ -int -ti_pinmux_padconf_set(const char *padname, const char *muxmode, unsigned int state) -{ - const struct ti_pinmux_padconf *padconf; - - if (!ti_pinmux_sc) - return (ENXIO); - - /* find the pin in the devmap */ - padconf = ti_pinmux_padconf_from_name(padname); - if (padconf == NULL) - return (EINVAL); - - return (ti_pinmux_padconf_set_internal(ti_pinmux_sc, padconf, muxmode, state)); -} - -/** - * ti_pinmux_padconf_get - gets the muxmode and state for a pad/pin - * @padname: the name of the pad, i.e. "c12" - * @muxmode: upon return will contain the name of the muxmode of the pin - * @state: upon return will contain the state of the pad/pin - * - * - * LOCKING: - * Internally locks it's own context. - * - * RETURNS: - * 0 on success. - * EINVAL if pin requested is outside valid range or already in use. - */ -int -ti_pinmux_padconf_get(const char *padname, const char **muxmode, - unsigned int *state) -{ - const struct ti_pinmux_padconf *padconf; - uint16_t reg_val; - - if (!ti_pinmux_sc) - return (ENXIO); - - /* find the pin in the devmap */ - padconf = ti_pinmux_padconf_from_name(padname); - if (padconf == NULL) - return (EINVAL); - - /* read the register value (16-bit reads) */ - reg_val = ti_pinmux_read_2(ti_pinmux_sc, padconf->reg_off); - - /* save the state */ - if (state) - *state = (reg_val & ti_pinmux_dev->padconf_sate_mask); - - /* save the mode */ - if (muxmode) - *muxmode = padconf->muxmodes[(reg_val & ti_pinmux_dev->padconf_muxmode_mask)]; - - return (0); -} - -/** - * ti_pinmux_padconf_set_gpiomode - converts a pad to GPIO mode. - * @gpio: the GPIO pin number (0-195) - * @state: the state to put the pad/pin in, i.e. PADCONF_PIN_??? - * - * - * - * LOCKING: - * Internally locks it's own context. - * - * RETURNS: - * 0 on success. - * EINVAL if pin requested is outside valid range or already in use. - */ -int -ti_pinmux_padconf_set_gpiomode(uint32_t gpio, unsigned int state) -{ - const struct ti_pinmux_padconf *padconf; - uint16_t reg_val; - - if (!ti_pinmux_sc) - return (ENXIO); - - /* find the gpio pin in the padconf array */ - padconf = ti_pinmux_dev->padconf; - while (padconf->ballname != NULL) { - if (padconf->gpio_pin == gpio) - break; - padconf++; - } - if (padconf->ballname == NULL) - return (EINVAL); - - /* populate the new value for the PADCONF register */ - reg_val = (uint16_t)(state & ti_pinmux_dev->padconf_sate_mask); - - /* set the mux mode */ - reg_val |= (uint16_t)(padconf->gpio_mode & ti_pinmux_dev->padconf_muxmode_mask); - - /* write the register value (16-bit writes) */ - ti_pinmux_write_2(ti_pinmux_sc, padconf->reg_off, reg_val); - - return (0); -} - -/** - * ti_pinmux_padconf_get_gpiomode - gets the current GPIO mode of the pin - * @gpio: the GPIO pin number (0-195) - * @state: upon return will contain the state - * - * - * - * LOCKING: - * Internally locks it's own context. - * - * RETURNS: - * 0 on success. - * EINVAL if pin requested is outside valid range or not configured as GPIO. - */ -int -ti_pinmux_padconf_get_gpiomode(uint32_t gpio, unsigned int *state) -{ - const struct ti_pinmux_padconf *padconf; - uint16_t reg_val; - - if (!ti_pinmux_sc) - return (ENXIO); - - /* find the gpio pin in the padconf array */ - padconf = ti_pinmux_dev->padconf; - while (padconf->ballname != NULL) { - if (padconf->gpio_pin == gpio) - break; - padconf++; - } - if (padconf->ballname == NULL) - return (EINVAL); - - /* read the current register settings */ - reg_val = ti_pinmux_read_2(ti_pinmux_sc, padconf->reg_off); - - /* check to make sure the pins is configured as GPIO in the first state */ - if ((reg_val & ti_pinmux_dev->padconf_muxmode_mask) != padconf->gpio_mode) - return (EINVAL); - - /* read and store the reset of the state, i.e. pull-up, pull-down, etc */ - if (state) - *state = (reg_val & ti_pinmux_dev->padconf_sate_mask); - - return (0); -} - -static int -ti_pinmux_configure_pins(device_t dev, phandle_t cfgxref) -{ - struct pincfg *cfgtuples, *cfg; - phandle_t cfgnode; - int i, ntuples; - static struct ti_pinmux_softc *sc; - - sc = device_get_softc(dev); - cfgnode = OF_node_from_xref(cfgxref); - ntuples = OF_getencprop_alloc_multi(cfgnode, "pinctrl-single,pins", - sizeof(*cfgtuples), (void **)&cfgtuples); - - if (ntuples < 0) - return (ENOENT); - - if (ntuples == 0) - return (0); /* Empty property is not an error. */ - - for (i = 0, cfg = cfgtuples; i < ntuples; i++, cfg++) { - if (bootverbose) { - char name[32]; - OF_getprop(cfgnode, "name", &name, sizeof(name)); - printf("%16s: muxreg 0x%04x muxval 0x%02x\n", - name, cfg->reg, cfg->conf); - } - - /* write the register value (16-bit writes) */ - ti_pinmux_write_2(sc, cfg->reg, cfg->conf); - } - - OF_prop_free(cfgtuples); - - return (0); -} - -/* - * Device part of OMAP SCM driver - */ - -static int -ti_pinmux_probe(device_t dev) -{ - if (!ofw_bus_status_okay(dev)) - return (ENXIO); - - if (!ofw_bus_is_compatible(dev, "pinctrl-single")) - return (ENXIO); - - if (ti_pinmux_sc) { - printf("%s: multiple pinctrl modules in device tree data, ignoring\n", - __func__); - return (EEXIST); - } - switch (ti_chip()) { -#ifdef SOC_OMAP4 - case CHIP_OMAP_4: - ti_pinmux_dev = &omap4_pinmux_dev; - break; -#endif -#ifdef SOC_TI_AM335X - case CHIP_AM335X: - ti_pinmux_dev = &ti_am335x_pinmux_dev; - break; -#endif - default: - printf("Unknown CPU in pinmux\n"); - return (ENXIO); - } - - - device_set_desc(dev, "TI Pinmux Module"); - return (BUS_PROBE_DEFAULT); -} - -/** - * ti_pinmux_attach - attaches the pinmux to the simplebus - * @dev: new device - * - * RETURNS - * Zero on success or ENXIO if an error occuried. - */ -static int -ti_pinmux_attach(device_t dev) -{ - struct ti_pinmux_softc *sc = device_get_softc(dev); - -#if 0 - if (ti_pinmux_sc) - return (ENXIO); -#endif - - sc->sc_dev = dev; - - if (bus_alloc_resources(dev, ti_pinmux_res_spec, sc->sc_res)) { - device_printf(dev, "could not allocate resources\n"); - return (ENXIO); - } - - sc->sc_bst = rman_get_bustag(sc->sc_res[0]); - sc->sc_bsh = rman_get_bushandle(sc->sc_res[0]); - - if (ti_pinmux_sc == NULL) - ti_pinmux_sc = sc; - - fdt_pinctrl_register(dev, "pinctrl-single,pins"); - fdt_pinctrl_configure_tree(dev); - - return (0); -} - -static device_method_t ti_pinmux_methods[] = { - DEVMETHOD(device_probe, ti_pinmux_probe), - DEVMETHOD(device_attach, ti_pinmux_attach), - - /* fdt_pinctrl interface */ - DEVMETHOD(fdt_pinctrl_configure, ti_pinmux_configure_pins), - { 0, 0 } -}; - -static driver_t ti_pinmux_driver = { - "ti_pinmux", - ti_pinmux_methods, - sizeof(struct ti_pinmux_softc), -}; - -static devclass_t ti_pinmux_devclass; - -DRIVER_MODULE(ti_pinmux, simplebus, ti_pinmux_driver, ti_pinmux_devclass, 0, 0); |