Module Name: src Committed By: jmcneill Date: Sat Aug 26 21:02:35 UTC 2017
Modified Files: src/sys/dev/i2c: files.i2c Added Files: src/sys/dev/i2c: tcakp.c Log Message: Add driver for Texas Instruments TCA8418 I2C Controller Keypad Scan IC. To generate a diff of this commit: cvs rdiff -u -r1.73 -r1.74 src/sys/dev/i2c/files.i2c cvs rdiff -u -r0 -r1.1 src/sys/dev/i2c/tcakp.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/dev/i2c/files.i2c diff -u src/sys/dev/i2c/files.i2c:1.73 src/sys/dev/i2c/files.i2c:1.74 --- src/sys/dev/i2c/files.i2c:1.73 Sat Apr 22 21:48:56 2017 +++ src/sys/dev/i2c/files.i2c Sat Aug 26 21:02:35 2017 @@ -1,4 +1,4 @@ -# $NetBSD: files.i2c,v 1.73 2017/04/22 21:48:56 jmcneill Exp $ +# $NetBSD: files.i2c,v 1.74 2017/08/26 21:02:35 jmcneill Exp $ obsolete defflag opt_i2cbus.h I2C_SCAN define i2cbus { } @@ -262,3 +262,8 @@ device as3722reg: as3722pmic attach as3722pmic at iic attach as3722reg at as3722pmic file dev/i2c/as3722.c as3722pmic needs-flag + +# Texas Instruments TCA8418 Keypad Scan IC +device tcakp: wskbddev +attach tcakp at iic +file dev/i2c/tcakp.c tcakp Added files: Index: src/sys/dev/i2c/tcakp.c diff -u /dev/null src/sys/dev/i2c/tcakp.c:1.1 --- /dev/null Sat Aug 26 21:02:35 2017 +++ src/sys/dev/i2c/tcakp.c Sat Aug 26 21:02:35 2017 @@ -0,0 +1,382 @@ +/* $NetBSD: tcakp.c,v 1.1 2017/08/26 21:02:35 jmcneill Exp $ */ + +/*- + * Copyright (c) 2017 Jared McNeill <jmcne...@invisible.ca> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 "opt_fdt.h" + +#include <sys/cdefs.h> +__KERNEL_RCSID(0, "$NetBSD: tcakp.c,v 1.1 2017/08/26 21:02:35 jmcneill Exp $"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/device.h> +#include <sys/conf.h> +#include <sys/bus.h> +#include <sys/kmem.h> +#include <sys/bitops.h> + +#include <dev/i2c/i2cvar.h> + +#include <dev/wscons/wsconsio.h> +#include <dev/wscons/wskbdvar.h> +#include <dev/wscons/wsksymdef.h> +#include <dev/wscons/wsksymvar.h> + +/* XXX keymap */ +#include <dev/pckbport/wskbdmap_mfii.c> + +#ifdef FDT +#include <dev/fdt/fdtvar.h> +#endif + +#define TCA_MAX_ROWS 8 +#define TCA_MAX_COLS 10 + +#define TCA_CFG 0x01 +#define CFG_AI __BIT(7) +#define CFG_GPI_E_CFG __BIT(6) +#define CFG_OVR_FLOW_M __BIT(5) +#define CFG_INT_CFG __BIT(4) +#define CFG_OVR_FLOW_IEN __BIT(3) +#define CFG_K_LCK_IEN __BIT(2) +#define CFG_GPI_IEN __BIT(1) +#define CFG_KE_IEN __BIT(0) +#define TCA_INT_STAT 0x02 +#define INT_STAT_CAD_INT __BIT(4) +#define INT_STAT_OVR_FLOW_INT __BIT(3) +#define INT_STAT_K_LCD_INT __BIT(2) +#define INT_STAT_GPI_INT __BIT(1) +#define INT_STAT_K_INT __BIT(0) +#define TCA_KEY_LCK_EC 0x03 +#define KEY_LCK_EC_K_LCK_EN __BIT(6) +#define KEY_LCK_EC_LCK2 __BIT(5) +#define KEY_LCK_EC_LCK1 __BIT(4) +#define KEY_LCK_EC_KEC __BITS(3,0) +#define TCA_EVENT(c) (0x04 + (c) - 'A') +#define TCA_EVENT_STATE __BIT(7) +#define TCA_EVENT_CODE __BITS(6,0) +#define TCA_KP_GPIO1 0x1d +#define TCA_KP_GPIO2 0x1e +#define TCA_KP_GPIO3 0x1f +#define TCA_DEBOUNCE_DIS1 0x29 +#define TCA_DEBOUNCE_DIS2 0x2a +#define TCA_DEBOUNCE_DIS3 0x2b + +#ifdef FDT +#define KC(n) KS_KEYCODE(n) +static const keysym_t tcakp_linux_event_keydesc[] = { + KC(1), +}; +#undef KC +#endif + +struct tcakp_softc { + device_t sc_dev; + i2c_tag_t sc_i2c; + i2c_addr_t sc_addr; + int sc_phandle; + + u_int sc_rows; + u_int sc_cols; + bool sc_autorepeat; + u_int sc_row_shift; + + uint16_t sc_keymap[128]; + + void *sc_ih; + + int sc_enabled; + device_t sc_wskbddev; +}; + +static int tcakp_match(device_t, cfdata_t, void *); +static void tcakp_attach(device_t, device_t, void *); + +static int tcakp_read(struct tcakp_softc *, uint8_t, uint8_t *); +static int tcakp_write(struct tcakp_softc *, uint8_t, uint8_t); + +CFATTACH_DECL_NEW(tcakp, sizeof(struct tcakp_softc), + tcakp_match, tcakp_attach, NULL, NULL); + +static const char * tcakp_compats[] = { + "ti,tca8418", + NULL +}; + +static u_int +tcakp_decode(struct tcakp_softc *sc, uint8_t code) +{ + u_int row = code / TCA_MAX_COLS; + u_int col = code % TCA_MAX_COLS; + if (col == 0) { + row = row - 1; + col = TCA_MAX_COLS - 1; + } else { + col = col - 1; + } + + return (row << sc->sc_row_shift) + col; +} + +static int +tcakp_intr(void *priv) +{ + struct tcakp_softc * const sc = priv; + uint8_t stat, ev; + int ret = 0; + + tcakp_read(sc, TCA_INT_STAT, &stat); + if (stat & INT_STAT_K_INT) { + tcakp_read(sc, TCA_EVENT('A'), &ev); + while (ev != 0) { + const bool pressed = __SHIFTOUT(ev, TCA_EVENT_STATE); + const uint8_t code = __SHIFTOUT(ev, TCA_EVENT_CODE); + + /* Translate raw code to keymap index */ + const u_int index = tcakp_decode(sc, code); + + u_int type = pressed ? WSCONS_EVENT_KEY_DOWN : + WSCONS_EVENT_KEY_UP; + int key = sc->sc_keymap[index]; + + if (sc->sc_wskbddev) + wskbd_input(sc->sc_wskbddev, type, key); + + tcakp_read(sc, TCA_EVENT('A'), &ev); + } + ret = 1; + } + tcakp_write(sc, TCA_INT_STAT, stat); + + return ret; +} + +static int +tcakp_init(struct tcakp_softc *sc) +{ + uint32_t mask; + uint8_t val; + + if (sc->sc_rows == 0 || sc->sc_cols == 0) { + aprint_error_dev(sc->sc_dev, "not configured\n"); + return ENXIO; + } + + mask = __BITS(sc->sc_rows - 1, 0); + mask += __BITS(sc->sc_cols - 1, 0) << 8; + + /* Lock the keyboard */ + tcakp_write(sc, TCA_KEY_LCK_EC, KEY_LCK_EC_K_LCK_EN); + /* Select keyboard mode */ + tcakp_write(sc, TCA_KP_GPIO1, (mask >> 0) & 0xff); + tcakp_write(sc, TCA_KP_GPIO2, (mask >> 8) & 0xff); + tcakp_write(sc, TCA_KP_GPIO3, (mask >> 16) & 0xff); + /* Disable debounce */ + tcakp_write(sc, TCA_DEBOUNCE_DIS1, (mask >> 0) & 0xff); + tcakp_write(sc, TCA_DEBOUNCE_DIS2, (mask >> 8) & 0xff); + tcakp_write(sc, TCA_DEBOUNCE_DIS3, (mask >> 16) & 0xff); + /* Enable key event interrupts */ + tcakp_write(sc, TCA_CFG, CFG_INT_CFG | CFG_KE_IEN); + /* Clear interrupts */ + tcakp_read(sc, TCA_INT_STAT, &val); + tcakp_write(sc, TCA_INT_STAT, val); + + return 0; +} + +static void +tcakp_configure_fdt(struct tcakp_softc *sc) +{ + const uint32_t *keymap; + int len; + + of_getprop_uint32(sc->sc_phandle, "keypad,num-rows", &sc->sc_rows); + of_getprop_uint32(sc->sc_phandle, "keypad,num-columns", &sc->sc_cols); + sc->sc_autorepeat = of_getprop_bool(sc->sc_phandle, "keypad,autorepeat"); + + keymap = fdtbus_get_prop(sc->sc_phandle, "linux,keymap", &len); + if (keymap == NULL || len <= 0) + return; + + sc->sc_row_shift = fls32(sc->sc_cols) - 1; + if (sc->sc_row_shift & (sc->sc_cols - 1)) + sc->sc_row_shift++; + + while (len >= 4) { + const uint32_t e = be32toh(*keymap); + const u_int row = (e >> 24) & 0xff; + const u_int col = (e >> 16) & 0xff; + const u_int index = (row << sc->sc_row_shift) + col; + + sc->sc_keymap[index] = e & 0xffff; + + len -= 4; + keymap++; + } +} + +static int +tcakp_enable(void *v, int on) +{ + struct tcakp_softc * const sc = v; + + if (on) { + /* Disable key lock */ + tcakp_write(sc, TCA_KEY_LCK_EC, 0); + } else { + /* Enable key lock */ + tcakp_write(sc, TCA_KEY_LCK_EC, KEY_LCK_EC_K_LCK_EN); + } + + return 0; +} + +static void +tcakp_set_leds(void *v, int leds) +{ +} + +static int +tcakp_ioctl(void *v, u_long cmd, void *data, int flag, lwp_t *l) +{ + switch (cmd) { + case WSKBDIO_GTYPE: + *(int *)data = WSKBD_TYPE_TCAKP; + return 0; + } + + return EPASSTHROUGH; +} + +static const struct wskbd_accessops tcakp_accessops = { + tcakp_enable, + tcakp_set_leds, + tcakp_ioctl, +}; + +#if notyet +static void +tcakp_cngetc(void *v, u_int *type, int *data) +{ + struct tcakp_softc * const sc = v; + uint8_t ev = 0; + + do { + tcakp_read(sc, TCA_EVENT('A'), &ev); + } while (ev == 0); + + const bool pressed = __SHIFTOUT(ev, TCA_EVENT_STATE); + const uint8_t code = __SHIFTOUT(ev, TCA_EVENT_CODE); + const u_int index = tcakp_decode(sc, code); + + *type = pressed ? WSCONS_EVENT_KEY_DOWN : + WSCONS_EVENT_KEY_UP; + *data = sc->sc_keymap[index]; +} + +static void +tcakp_cnpollc(void *v, int on) +{ +} + +static void +tcakp_cnbell(void *v, u_int pitch, u_int period, u_int volume) +{ +} + +static const struct wskbd_consops tcakp_consops = { + tcakp_cngetc, + tcakp_cnpollc, + tcakp_cnbell, +}; +#endif + +static const struct wskbd_mapdata tcakp_keymapdata = { + pckbd_keydesctab, + KB_US, +}; + +static int +tcakp_match(device_t parent, cfdata_t match, void *aux) +{ + struct i2c_attach_args *ia = aux; + + if (ia->ia_name == NULL) + return 1; + else + return iic_compat_match(ia, tcakp_compats); +} + +static void +tcakp_attach(device_t parent, device_t self, void *aux) +{ + struct tcakp_softc * const sc = device_private(self); + struct i2c_attach_args *ia = aux; + struct wskbddev_attach_args a; + + sc->sc_dev = self; + sc->sc_i2c = ia->ia_tag; + sc->sc_addr = ia->ia_addr; + sc->sc_phandle = ia->ia_cookie; + + aprint_naive("\n"); + aprint_normal(": TCA8418\n"); + +#ifdef FDT + sc->sc_ih = fdtbus_intr_establish(sc->sc_phandle, 0, IPL_VM, + FDT_INTR_MPSAFE, tcakp_intr, sc); + + tcakp_configure_fdt(sc); +#endif + + if (tcakp_init(sc) != 0) + return; + + memset(&a, 0, sizeof(a)); + a.console = false; /* XXX */ + a.keymap = &tcakp_keymapdata; + a.accessops = &tcakp_accessops; + a.accesscookie = sc; + + sc->sc_wskbddev = config_found_ia(self, "wskbddev", &a, wskbddevprint); +} + +static int +tcakp_read(struct tcakp_softc *sc, uint8_t reg, uint8_t *val) +{ + return iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr, + ®, 1, val, 1, I2C_F_POLL); +} + +static int +tcakp_write(struct tcakp_softc *sc, uint8_t reg, uint8_t val) +{ + uint8_t buf[2] = { reg, val }; + return iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, + NULL, 0, buf, 2, I2C_F_POLL); +}