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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [devs/] [touch/] [arm/] [ipaq/] [v2_0/] [src/] [ipaq_ts.c] - Rev 27
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//========================================================================== // // ipaq_ts.c // // Touchscreen 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: 2001-03-05 // Purpose: // Description: Touchscreen driver for Compaq IPAQ // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/devs_touch_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 ts_select_info; static cyg_bool ts_select_active; #include <cyg/io/devtab.h> #include <cyg/hal/atmel_support.h> // Functions in this module static Cyg_ErrNo ts_read(cyg_io_handle_t handle, void *buffer, cyg_uint32 *len); static cyg_bool ts_select(cyg_io_handle_t handle, cyg_uint32 which, cyg_addrword_t info); static Cyg_ErrNo ts_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buffer, cyg_uint32 *len); static Cyg_ErrNo ts_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buffer, cyg_uint32 *len); static bool ts_init(struct cyg_devtab_entry *tab); static Cyg_ErrNo ts_lookup(struct cyg_devtab_entry **tab, struct cyg_devtab_entry *st, const char *name); CHAR_DEVIO_TABLE(ipaq_ts_handlers, NULL, // Unsupported write() function ts_read, ts_select, ts_get_config, ts_set_config); CHAR_DEVTAB_ENTRY(ipaq_ts_device, CYGDAT_DEVS_TOUCH_IPAQ_NAME, NULL, // Base device name &ipaq_ts_handlers, ts_init, ts_lookup, NULL); // Private data pointer struct _event { short button_state; short xPos, yPos; short _unused; }; #define MAX_EVENTS CYGNUM_DEVS_TOUCH_IPAQ_EVENT_BUFFER_SIZE static int num_events; static int _event_put, _event_get; static bool pen_down = false; static struct _event _events[MAX_EVENTS]; static bool _is_open = false; #ifdef DEBUG_RAW_EVENTS static unsigned char _ts_buf[512]; static int _ts_buf_ptr = 0; #endif // // Note: this routine is called from the Atmel processing DSR // static void ts_handler(atmel_pkt *pkt) { unsigned char *dp = pkt->data; static short lastX, lastY; short x, y; struct _event *ev; #ifdef DEBUG_RAW_EVENTS memcpy(&_ts_buf[_ts_buf_ptr], pkt->data, 8); _ts_buf_ptr += 8; if (_ts_buf_ptr == 512) { diag_printf("TS handler\n"); diag_dump_buf(_ts_buf, 512); _ts_buf_ptr = 0; } #endif // Try and interpret the mouse data if ((dp[0] & 0x0F) == 0) { // This is a pen up event x = lastX; y = lastY; pen_down = false; } else { // Some sort of event with the pen down x = lastX = (dp[1] << 8) | dp[2]; y = lastY = (dp[3] << 8) | dp[4]; pen_down = true; } if (num_events < MAX_EVENTS) { num_events++; ev = &_events[_event_put++]; if (_event_put == MAX_EVENTS) { _event_put = 0; } ev->button_state = pen_down ? 0x04 : 0x00; ev->xPos = x; ev->yPos = y; if (ts_select_active) { ts_select_active = false; cyg_selwakeup(&ts_select_info); } } } typedef struct { short min; short max; short span; } bounds; static bounds xBounds = {1024, 0, 1024}; static bounds yBounds = {1024, 0, 1024}; static Cyg_ErrNo ts_read(cyg_io_handle_t handle, void *buffer, cyg_uint32 *len) { struct _event *ev; int tot = *len; unsigned char *bp = (unsigned char *)buffer; cyg_scheduler_lock(); // Prevent interaction with DSR code while (tot >= sizeof(struct _event)) { if (num_events > 0) { ev = &_events[_event_get++]; if (_event_get == MAX_EVENTS) { _event_get = 0; } // Self calibrate if (ev->xPos > xBounds.max) xBounds.max = ev->xPos; if (ev->xPos < xBounds.min) xBounds.min = ev->xPos; if (ev->yPos > yBounds.max) yBounds.max = ev->yPos; if (ev->yPos < yBounds.min) yBounds.min = ev->yPos; if ((xBounds.span = xBounds.max - xBounds.min) <= 1) { xBounds.span = 1; } if ((yBounds.span = yBounds.max - yBounds.min) <= 1) { yBounds.span = 1; } // Scale values - done here so these potentially lengthy // operations take place outside of interrupt processing ev->xPos = ((xBounds.max - ev->xPos) * 320) / xBounds.span; ev->yPos = ((yBounds.max - ev->yPos) * 240) / yBounds.span; 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 ts_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 (!ts_select_active) { ts_select_active = true; cyg_selrecord(info, &ts_select_info); } cyg_scheduler_unlock(); // Reallow interaction with DSR code } return false; } static Cyg_ErrNo ts_set_config(cyg_io_handle_t handle, cyg_uint32 key, const void *buffer, cyg_uint32 *len) { return EINVAL; } static Cyg_ErrNo ts_get_config(cyg_io_handle_t handle, cyg_uint32 key, void *buffer, cyg_uint32 *len) { return EINVAL; } static bool ts_init(struct cyg_devtab_entry *tab) { cyg_selinit(&ts_select_info); return true; } static Cyg_ErrNo ts_lookup(struct cyg_devtab_entry **tab, struct cyg_devtab_entry *st, const char *name) { if (!_is_open) { _is_open = true; atmel_register(ATMEL_CMD_TOUCH, ts_handler); atmel_interrupt_mode(true); } return ENOERR; }
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