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skrzyp |
//==========================================================================
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//
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// devs/pcmcia/cerfpda/cerfpda_pcmcia.c
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//
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// PCMCIA support (Card Services)
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//
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//==========================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2000-07-06
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// Purpose: PCMCIA support
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// Description:
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include <pkgconf/io_pcmcia.h>
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#include <cyg/hal/hal_io.h> // IO macros
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#include <cyg/hal/hal_arch.h> // Register state info
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#include <cyg/hal/hal_intr.h> // HAL interrupt macros
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#include <cyg/hal/drv_api.h>
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#ifdef CYGPKG_KERNEL
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#include <pkgconf/kernel.h> // Configuration header
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#include <cyg/kernel/kapi.h>
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#endif
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#include <cyg/hal/hal_if.h>
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#include <cyg/io/pcmcia.h>
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#include <cyg/infra/diag.h>
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#include <cyg/hal/hal_sa11x0.h> // Board definitions
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#include <cyg/hal/cerfpda.h>
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#ifdef CYGPKG_KERNEL
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static cyg_interrupt cf_detect_interrupt;
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static cyg_handle_t cf_detect_interrupt_handle;
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static cyg_interrupt cf_irq_interrupt;
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static cyg_handle_t cf_irq_interrupt_handle;
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// This ISR is called when a CompactFlash board is inserted
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static int
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cf_detect_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters *regs)
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{
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cyg_interrupt_mask(SA1110_CF_DETECT);
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return (CYG_ISR_HANDLED|CYG_ISR_CALL_DSR); // Run the DSR
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}
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// This DSR handles the board insertion
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static void
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cf_detect_dsr(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
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{
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unsigned long new_state = *SA11X0_GPIO_PIN_LEVEL;
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struct cf_slot *slot = (struct cf_slot *)data;
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if ((new_state & SA1110_GPIO_CF_DETECT) == SA1110_GPIO_CF_PRESENT) {
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slot->state = CF_SLOT_STATE_Inserted;
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} else {
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slot->state = CF_SLOT_STATE_Removed; // Implies powered up, etc.
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}
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cyg_interrupt_acknowledge(SA1110_CF_DETECT);
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cyg_interrupt_unmask(SA1110_CF_DETECT);
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}
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// This ISR is called when the card interrupt occurs
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static int
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cf_irq_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters *regs)
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{
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cyg_drv_interrupt_mask(SA1110_CF_IRQ);
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return (CYG_ISR_HANDLED|CYG_ISR_CALL_DSR); // Run the DSR
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}
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// This DSR handles the card interrupt
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static void
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cf_irq_dsr(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
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{
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struct cf_slot *slot = (struct cf_slot *)data;
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#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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cyg_bool was_ctrlc_int;
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#endif
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// Clear interrupt [edge indication]
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cyg_drv_interrupt_acknowledge(SA1110_CF_IRQ);
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#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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was_ctrlc_int = HAL_CTRLC_CHECK(vector, data);
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if (!was_ctrlc_int) // Fall through and run normal code
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#endif
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// Process interrupt
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(slot->irq_handler.handler)(vector, count, slot->irq_handler.param);
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// Allow interrupts to happen again
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cyg_drv_interrupt_unmask(SA1110_CF_IRQ);
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}
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#endif
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//
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// Fill in the details of a PCMCIA slot and initialize the device
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//
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void
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cf_hwr_init(struct cf_slot *slot)
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{
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static int int_init = 0;
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unsigned long new_state = *SA11X0_GPIO_PIN_LEVEL;
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if (!int_init) {
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int_init = 1;
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#ifdef CYGPKG_KERNEL
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// Set up interrupts
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cyg_drv_interrupt_create(SA1110_CF_DETECT,
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99, // Priority - what goes here?
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(cyg_addrword_t) slot, // Data item passed to interrupt handler
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(cyg_ISR_t *)cf_detect_isr,
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(cyg_DSR_t *)cf_detect_dsr,
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&cf_detect_interrupt_handle,
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&cf_detect_interrupt);
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cyg_drv_interrupt_attach(cf_detect_interrupt_handle);
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cyg_drv_interrupt_configure(SA1110_CF_DETECT, true, true); // Detect either edge
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cyg_drv_interrupt_acknowledge(SA1110_CF_DETECT);
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cyg_drv_interrupt_unmask(SA1110_CF_DETECT);
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cyg_drv_interrupt_create(SA1110_CF_IRQ,
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99, // Priority - what goes here?
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(cyg_addrword_t) slot, // Data item passed to interrupt handler
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(cyg_ISR_t *)cf_irq_isr,
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(cyg_DSR_t *)cf_irq_dsr,
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&cf_irq_interrupt_handle,
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&cf_irq_interrupt);
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cyg_drv_interrupt_attach(cf_irq_interrupt_handle);
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cyg_drv_interrupt_unmask(SA1110_CF_IRQ);
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#endif
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cyg_drv_interrupt_configure(SA1110_CF_IRQ, false, false); // Falling edge
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cyg_drv_interrupt_acknowledge(SA1110_CF_IRQ);
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}
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slot->attr = (unsigned char *)0x38000000;
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slot->attr_length = 0x200;
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slot->io = (unsigned char *)0x30000000;
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slot->io_length = 0x04000000;
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slot->mem = (unsigned char *)0x3C000000;
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slot->mem_length = 0x04000000;
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slot->int_num = SA1110_CF_IRQ;
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#ifdef CYG_HAL_STARTUP_ROM
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// Disable CF bus & power (idle/off)
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cerfpda_BCR(SA1110_BCR_CF_POWER |
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SA1110_BCR_CF_RESET |
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SA1110_BCR_CF_BUS,
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SA1110_BCR_CF_POWER_OFF |
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SA1110_BCR_CF_RESET_DISABLE |
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SA1110_BCR_CF_BUS_OFF);
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#endif
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if ((new_state & SA1110_GPIO_CF_DETECT) == SA1110_GPIO_CF_PRESENT) {
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if ((_cerfpda_BCR & SA1110_BCR_CF_POWER) == SA1110_BCR_CF_POWER_ON) {
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// Assume that the ROM environment has turned the bus on
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slot->state = CF_SLOT_STATE_Ready;
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} else {
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slot->state = CF_SLOT_STATE_Inserted;
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}
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} else {
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slot->state = CF_SLOT_STATE_Empty;
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}
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}
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void
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cf_hwr_poll(struct cf_slot *slot)
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{
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unsigned long new_state = *SA11X0_GPIO_PIN_LEVEL;
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if ((new_state & SA1110_GPIO_CF_DETECT) == SA1110_GPIO_CF_PRESENT) {
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slot->state = CF_SLOT_STATE_Inserted;
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} else {
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slot->state = CF_SLOT_STATE_Empty;
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}
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}
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static void
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do_delay(int ticks)
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{
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#ifdef CYGPKG_KERNEL
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cyg_thread_delay(ticks);
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#else
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CYGACC_CALL_IF_DELAY_US(10000*ticks);
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#endif
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}
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//
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// Transition the card/slot to a new state
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// note: currently only supports transitions to Ready, Empty
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//
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bool
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cf_hwr_change_state(struct cf_slot *slot, int new_state)
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{
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int i, ptr, len;
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unsigned char buf[256];
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if (new_state == CF_SLOT_STATE_Ready) {
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if (slot->state == CF_SLOT_STATE_Inserted) {
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cerfpda_BCR(SA1110_BCR_CF_POWER |
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SA1110_BCR_CF_RESET |
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SA1110_BCR_CF_BUS,
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SA1110_BCR_CF_POWER_ON |
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SA1110_BCR_CF_RESET_DISABLE |
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SA1110_BCR_CF_BUS_OFF);
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do_delay(30); // At least 300 ms
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slot->state = CF_SLOT_STATE_Powered;
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cerfpda_BCR(SA1110_BCR_CF_POWER |
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SA1110_BCR_CF_RESET |
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SA1110_BCR_CF_BUS,
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SA1110_BCR_CF_POWER_ON |
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SA1110_BCR_CF_RESET_ENABLE |
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SA1110_BCR_CF_BUS_ON);
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do_delay(1); // At least 10 us
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slot->state = CF_SLOT_STATE_Reset;
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cerfpda_BCR(SA1110_BCR_CF_POWER |
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SA1110_BCR_CF_RESET |
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SA1110_BCR_CF_BUS,
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SA1110_BCR_CF_POWER_ON |
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SA1110_BCR_CF_RESET_DISABLE |
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SA1110_BCR_CF_BUS_ON);
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do_delay(5); // At least 20 ms
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// Wait until the card is ready to talk
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for (i = 0; i < 10; i++) {
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ptr = 0;
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if (cf_get_CIS(slot, CF_CISTPL_VERS_1, buf, &len, &ptr)) {
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slot->state = CF_SLOT_STATE_Ready;
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break;
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}
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do_delay(10);
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}
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}
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}
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}
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//
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// Acknowledge interrupt (used in non-kernel environments)
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//
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void
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cf_hwr_clear_interrupt(struct cf_slot *slot)
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{
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// Clear interrupt [edge indication]
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cyg_drv_interrupt_acknowledge(SA1110_CF_IRQ);
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}
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