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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [devs/] [kbd/] [arm/] [ipaq/] [v2_0/] [src/] [ipaq_kbd.c] - Rev 27
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//========================================================================== // // ipaq_kbd.c // // Keypad driver for the Compaq iPAQ // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): gthomas // Contributors: gthomas // Date: 2001-03-15 // Purpose: // Description: Keypad driver for Compaq IPAQ // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/devs_kbd_ipaq.h> #include <cyg/kernel/kapi.h> #include <cyg/hal/hal_io.h> #include <cyg/hal/hal_arch.h> #include <cyg/hal/drv_api.h> #include <cyg/hal/hal_intr.h> #include <cyg/hal/hal_sa11x0.h> #include <cyg/hal/ipaq.h> #include <cyg/infra/cyg_type.h> #include <cyg/infra/cyg_ass.h> #include <cyg/fileio/fileio.h> // For select() functionality static cyg_selinfo kbd_select_info; static cyg_bool kbd_select_active; #include <cyg/io/devtab.h> #include <cyg/hal/atmel_support.h> // Functions in this module static Cyg_ErrNo kbd_read(cyg_io_handle_t handle, void *buffer, cyg_uint32 *len); static cyg_bool kbd_select(cyg_io_handle_t handle, cyg_uint32 which, cyg_addrword_t info); static Cyg_ErrNo kbd_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buffer, cyg_uint32 *len); static Cyg_ErrNo kbd_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buffer, cyg_uint32 *len); static bool kbd_init(struct cyg_devtab_entry *tab); static Cyg_ErrNo kbd_lookup(struct cyg_devtab_entry **tab, struct cyg_devtab_entry *st, const char *name); CHAR_DEVIO_TABLE(ipaq_kbd_handlers, NULL, // Unsupported write() function kbd_read, kbd_select, kbd_get_config, kbd_set_config); CHAR_DEVTAB_ENTRY(ipaq_kbd_device, CYGDAT_DEVS_KBD_IPAQ_NAME, NULL, // Base device name &ipaq_kbd_handlers, kbd_init, kbd_lookup, NULL); // Private data pointer #define MAX_EVENTS CYGNUM_DEVS_KBD_IPAQ_EVENT_BUFFER_SIZE static int num_events; static int _event_put, _event_get; static unsigned char _events[MAX_EVENTS]; static bool _is_open = false; // // Note: this routine is called from the Atmel processing DSR // static void kbd_handler(atmel_pkt *pkt) { unsigned char *dp = pkt->data; unsigned char *ev; // diag_printf("KBD = %x\n", dp[1]); if (num_events < MAX_EVENTS) { num_events++; ev = &_events[_event_put++]; if (_event_put == MAX_EVENTS) { _event_put = 0; } *ev = dp[1]; if (kbd_select_active) { kbd_select_active = false; cyg_selwakeup(&kbd_select_info); } } } static Cyg_ErrNo kbd_read(cyg_io_handle_t handle, void *buffer, cyg_uint32 *len) { unsigned char *ev; int tot = *len; unsigned char *bp = (unsigned char *)buffer; cyg_scheduler_lock(); // Prevent interaction with DSR code while (tot >= sizeof(*ev)) { if (num_events > 0) { ev = &_events[_event_get++]; if (_event_get == MAX_EVENTS) { _event_get = 0; } memcpy(bp, ev, sizeof(*ev)); bp += sizeof(*ev); tot -= sizeof(*ev); num_events--; } else { break; // No more events } } cyg_scheduler_unlock(); // Allow DSRs again *len -= tot; return ENOERR; } static cyg_bool kbd_select(cyg_io_handle_t handle, cyg_uint32 which, cyg_addrword_t info) { if (which == CYG_FREAD) { cyg_scheduler_lock(); // Prevent interaction with DSR code if (num_events > 0) { cyg_scheduler_unlock(); // Reallow interaction with DSR code return true; } if (!kbd_select_active) { kbd_select_active = true; cyg_selrecord(info, &kbd_select_info); } cyg_scheduler_unlock(); // Reallow interaction with DSR code } return false; } static Cyg_ErrNo kbd_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buffer, cyg_uint32 *len) { return EINVAL; } static Cyg_ErrNo kbd_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buffer, cyg_uint32 *len) { return EINVAL; } static bool kbd_init(struct cyg_devtab_entry *tab) { cyg_selinit(&kbd_select_info); return true; } static Cyg_ErrNo kbd_lookup(struct cyg_devtab_entry **tab, struct cyg_devtab_entry *st, const char *name) { if (!_is_open) { _is_open = true; atmel_register(ATMEL_CMD_KEYBD, kbd_handler); atmel_interrupt_mode(true); } return ENOERR; }
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