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Diff for /src/sys/dev/isa/ptcd.c between version 1.3.22.1 and 1.3.22.2

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 */
   
   /*
    * Copyright (c) 2012 Marc Balmer <marc@msys.ch>
    * 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 AUTHOR ``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 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.
    */
   
   /*
    * Driver for the Protech PS3100 cash drawer port.
    */
   
   #include <sys/param.h>
   #include <sys/systm.h>
   #include <sys/device.h>
   #include <sys/gpio.h>
   #include <sys/kernel.h>
   #include <sys/bus.h>
   
   #include <machine/pio.h>
   
   #include <dev/gpio/gpiovar.h>
   
   #include <dev/isa/isareg.h>
   #include <dev/isa/isavar.h>
   
   /*
    * To assert the cash drawer pulse, 0x00 must be written to I/O register 0x48f
    * To stop the cash drawer pulse, 0x02 must be written to I/O register 0x48f
    * To read out the current cash drawer state (sense pin), read bit 7 of
    * I/O register 0x48d
    */
   
   #define PTCD_READ_REG   0x48d
   
   /* register offsets, counted from PTCD_READ_REG */
   #define PTCD_READ       0x00
   #define PTCD_WRITE      0x02
   
   /* Read mask */
   #define PTCD_SENSE      0x80
   
   /* Write values */
   #define PTCD_OPEN       0x00
   #define PTCD_CLOSE      0x02
   
   #define PTCD_NPINS      2
   #define PIN_WRITE       0
   #define PIN_READ        1
   
   #define PTCD_ADDR_SIZE  0x03
   
   struct ptcd_softc {
           bus_space_tag_t sc_iot;
           bus_space_handle_t sc_ioh;
   
           /* GPIO interface */
           struct gpio_chipset_tag sc_gpio_gc;
           gpio_pin_t              sc_gpio_pins[PTCD_NPINS];
   };
   
   int ptcd_match(device_t, struct cfdata *, void *);
   void ptcd_attach(device_t, device_t, void *);
   
   int     ptcd_gpio_pin_read(void *, int);
   void    ptcd_gpio_pin_write(void *, int, int);
   void    ptcd_gpio_pin_ctl(void *, int, int);
   
   CFATTACH_DECL2_NEW(ptcd, sizeof(struct ptcd_softc), ptcd_match, ptcd_attach,
       NULL, NULL, NULL, NULL);
   
   int
   ptcd_match(device_t parent, struct cfdata *match, void *aux)
   {
           struct isa_attach_args *ia = aux;
   
           if (ia->ia_nio < 1)
                   return 0;
   
           if (ISA_DIRECT_CONFIG(ia))
                   return 0;
   
           if (ia->ia_io[0].ir_addr != PTCD_READ_REG)
                   return 0;
   
           ia->ia_io[0].ir_size = PTCD_ADDR_SIZE;
           ia->ia_niomem = 0;
           ia->ia_nirq = 0;
           ia->ia_ndrq = 0;
   
           return 1;
   }
   
   void
   ptcd_attach(device_t parent, device_t self, void *aux)
   {
           struct ptcd_softc *sc;
           struct isa_attach_args *ia = aux;
           struct gpiobus_attach_args gba;
   
           sc = device_private(self);
   
           sc->sc_iot = ia->ia_iot;
           if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, PTCD_ADDR_SIZE, 0,
               &sc->sc_ioh)) {
                   aprint_error(": can't map i/o space\n");
                   return;
           }
   
           aprint_normal(": Protech PS3100 cash drawer\n");
   
           /* Initialize pins array */
           sc->sc_gpio_pins[PIN_WRITE].pin_num = 0;
           sc->sc_gpio_pins[PIN_WRITE].pin_caps = GPIO_PIN_OUTPUT;
           sc->sc_gpio_pins[PIN_READ].pin_num = 1;
           sc->sc_gpio_pins[PIN_READ].pin_caps = GPIO_PIN_INPUT;
   
           /* Create controller tag */
           sc->sc_gpio_gc.gp_cookie = sc;
           sc->sc_gpio_gc.gp_pin_read = ptcd_gpio_pin_read;
           sc->sc_gpio_gc.gp_pin_write = ptcd_gpio_pin_write;
           sc->sc_gpio_gc.gp_pin_ctl = ptcd_gpio_pin_ctl;
   
           gba.gba_gc = &sc->sc_gpio_gc;
           gba.gba_pins = sc->sc_gpio_pins;
           gba.gba_npins = PTCD_NPINS;
   
           /* Attach GPIO framework */
           config_found_ia(self, "gpiobus", &gba, gpiobus_print);
   }
   
   int
   ptcd_gpio_pin_read(void *arg, int pin)
   {
           struct ptcd_softc *sc = arg;
           uint8_t data;
   
           if (pin != PIN_READ)
                   return 0;
   
           data = bus_space_read_1(sc->sc_iot, sc->sc_ioh, PTCD_READ);
           return data & PTCD_SENSE ? 0 : 1;
   }
   
   void
   ptcd_gpio_pin_write(void *arg, int pin, int value)
   {
           struct ptcd_softc *sc = arg;
   
           if (pin != PIN_WRITE)
                   return;
   
           bus_space_write_1(sc->sc_iot, sc->sc_ioh, PTCD_WRITE,
               value ? PTCD_OPEN : PTCD_CLOSE);
   }
   
   void
   ptcd_gpio_pin_ctl(void *arg, int pin, int flags)
   {
           /* We ignore pin control requests since the pin functions are fixed. */
   }

Legend:
Removed from v.1.3.22.1  
changed lines
  Added in v.1.3.22.2

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