version 1.3.22.1, 2012/12/17 17:46:27 |
version 1.3.22.2, 2015/04/16 07:01:39 |
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/* $NetBSD */ |
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/* |
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* Copyright (c) 2012 Marc Balmer <marc@msys.ch> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* Driver for the Protech PS3100 cash drawer port. |
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*/ |
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#include <sys/param.h> |
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#include <sys/systm.h> |
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#include <sys/device.h> |
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#include <sys/gpio.h> |
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#include <sys/kernel.h> |
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#include <sys/bus.h> |
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#include <machine/pio.h> |
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#include <dev/gpio/gpiovar.h> |
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#include <dev/isa/isareg.h> |
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#include <dev/isa/isavar.h> |
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/* |
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* To assert the cash drawer pulse, 0x00 must be written to I/O register 0x48f |
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* To stop the cash drawer pulse, 0x02 must be written to I/O register 0x48f |
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* To read out the current cash drawer state (sense pin), read bit 7 of |
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* I/O register 0x48d |
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*/ |
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#define PTCD_READ_REG 0x48d |
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/* register offsets, counted from PTCD_READ_REG */ |
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#define PTCD_READ 0x00 |
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#define PTCD_WRITE 0x02 |
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/* Read mask */ |
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#define PTCD_SENSE 0x80 |
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/* Write values */ |
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#define PTCD_OPEN 0x00 |
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#define PTCD_CLOSE 0x02 |
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#define PTCD_NPINS 2 |
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#define PIN_WRITE 0 |
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#define PIN_READ 1 |
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#define PTCD_ADDR_SIZE 0x03 |
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struct ptcd_softc { |
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bus_space_tag_t sc_iot; |
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bus_space_handle_t sc_ioh; |
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/* GPIO interface */ |
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struct gpio_chipset_tag sc_gpio_gc; |
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gpio_pin_t sc_gpio_pins[PTCD_NPINS]; |
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}; |
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int ptcd_match(device_t, struct cfdata *, void *); |
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void ptcd_attach(device_t, device_t, void *); |
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int ptcd_gpio_pin_read(void *, int); |
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void ptcd_gpio_pin_write(void *, int, int); |
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void ptcd_gpio_pin_ctl(void *, int, int); |
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CFATTACH_DECL2_NEW(ptcd, sizeof(struct ptcd_softc), ptcd_match, ptcd_attach, |
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NULL, NULL, NULL, NULL); |
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int |
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ptcd_match(device_t parent, struct cfdata *match, void *aux) |
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{ |
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struct isa_attach_args *ia = aux; |
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if (ia->ia_nio < 1) |
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return 0; |
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if (ISA_DIRECT_CONFIG(ia)) |
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return 0; |
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if (ia->ia_io[0].ir_addr != PTCD_READ_REG) |
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return 0; |
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ia->ia_io[0].ir_size = PTCD_ADDR_SIZE; |
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ia->ia_niomem = 0; |
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ia->ia_nirq = 0; |
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ia->ia_ndrq = 0; |
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return 1; |
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} |
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void |
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ptcd_attach(device_t parent, device_t self, void *aux) |
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{ |
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struct ptcd_softc *sc; |
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struct isa_attach_args *ia = aux; |
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struct gpiobus_attach_args gba; |
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sc = device_private(self); |
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sc->sc_iot = ia->ia_iot; |
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if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, PTCD_ADDR_SIZE, 0, |
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&sc->sc_ioh)) { |
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aprint_error(": can't map i/o space\n"); |
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return; |
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} |
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aprint_normal(": Protech PS3100 cash drawer\n"); |
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/* Initialize pins array */ |
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sc->sc_gpio_pins[PIN_WRITE].pin_num = 0; |
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sc->sc_gpio_pins[PIN_WRITE].pin_caps = GPIO_PIN_OUTPUT; |
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sc->sc_gpio_pins[PIN_READ].pin_num = 1; |
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sc->sc_gpio_pins[PIN_READ].pin_caps = GPIO_PIN_INPUT; |
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/* Create controller tag */ |
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sc->sc_gpio_gc.gp_cookie = sc; |
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sc->sc_gpio_gc.gp_pin_read = ptcd_gpio_pin_read; |
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sc->sc_gpio_gc.gp_pin_write = ptcd_gpio_pin_write; |
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sc->sc_gpio_gc.gp_pin_ctl = ptcd_gpio_pin_ctl; |
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gba.gba_gc = &sc->sc_gpio_gc; |
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gba.gba_pins = sc->sc_gpio_pins; |
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gba.gba_npins = PTCD_NPINS; |
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/* Attach GPIO framework */ |
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config_found_ia(self, "gpiobus", &gba, gpiobus_print); |
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} |
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int |
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ptcd_gpio_pin_read(void *arg, int pin) |
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{ |
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struct ptcd_softc *sc = arg; |
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uint8_t data; |
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if (pin != PIN_READ) |
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return 0; |
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data = bus_space_read_1(sc->sc_iot, sc->sc_ioh, PTCD_READ); |
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return data & PTCD_SENSE ? 0 : 1; |
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} |
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void |
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ptcd_gpio_pin_write(void *arg, int pin, int value) |
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{ |
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struct ptcd_softc *sc = arg; |
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if (pin != PIN_WRITE) |
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return; |
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, PTCD_WRITE, |
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value ? PTCD_OPEN : PTCD_CLOSE); |
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} |
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void |
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ptcd_gpio_pin_ctl(void *arg, int pin, int flags) |
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{ |
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/* We ignore pin control requests since the pin functions are fixed. */ |
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} |