diff options
Diffstat (limited to 'arch/mips/pmcs-msp71xx/msp_hwbutton.c')
| -rw-r--r-- | arch/mips/pmcs-msp71xx/msp_hwbutton.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/arch/mips/pmcs-msp71xx/msp_hwbutton.c b/arch/mips/pmcs-msp71xx/msp_hwbutton.c deleted file mode 100644 index bb57ed9ea2bd..000000000000 --- a/arch/mips/pmcs-msp71xx/msp_hwbutton.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Sets up interrupt handlers for various hardware switches which are - * connected to interrupt lines. - * - * Copyright 2005-2207 PMC-Sierra, Inc. - * - * This program 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 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``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. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/interrupt.h> - -#include <msp_int.h> -#include <msp_regs.h> -#include <msp_regops.h> - -/* For hwbutton_interrupt->initial_state */ -#define HWBUTTON_HI 0x1 -#define HWBUTTON_LO 0x2 - -/* - * This struct describes a hardware button - */ -struct hwbutton_interrupt { - char *name; /* Name of button */ - int irq; /* Actual LINUX IRQ */ - int eirq; /* Extended IRQ number (0-7) */ - int initial_state; /* The "normal" state of the switch */ - void (*handle_hi)(void *); /* Handler: switch input has gone HI */ - void (*handle_lo)(void *); /* Handler: switch input has gone LO */ - void *data; /* Optional data to pass to handler */ -}; - -#ifdef CONFIG_PMC_MSP7120_GW -extern void msp_restart(char *); - -static void softreset_push(void *data) -{ - printk(KERN_WARNING "SOFTRESET switch was pushed\n"); - - /* - * In the future you could move this to the release handler, - * timing the difference between the 'push' and 'release', and only - * doing this ungraceful restart if the button has been down for - * a certain amount of time; otherwise doing a graceful restart. - */ - - msp_restart(NULL); -} - -static void softreset_release(void *data) -{ - printk(KERN_WARNING "SOFTRESET switch was released\n"); - - /* Do nothing */ -} - -static void standby_on(void *data) -{ - printk(KERN_WARNING "STANDBY switch was set to ON (not implemented)\n"); - - /* TODO: Put board in standby mode */ -} - -static void standby_off(void *data) -{ - printk(KERN_WARNING - "STANDBY switch was set to OFF (not implemented)\n"); - - /* TODO: Take out of standby mode */ -} - -static struct hwbutton_interrupt softreset_sw = { - .name = "Softreset button", - .irq = MSP_INT_EXT0, - .eirq = 0, - .initial_state = HWBUTTON_HI, - .handle_hi = softreset_release, - .handle_lo = softreset_push, - .data = NULL, -}; - -static struct hwbutton_interrupt standby_sw = { - .name = "Standby switch", - .irq = MSP_INT_EXT1, - .eirq = 1, - .initial_state = HWBUTTON_HI, - .handle_hi = standby_off, - .handle_lo = standby_on, - .data = NULL, -}; -#endif /* CONFIG_PMC_MSP7120_GW */ - -static irqreturn_t hwbutton_handler(int irq, void *data) -{ - struct hwbutton_interrupt *hirq = data; - unsigned long cic_ext = *CIC_EXT_CFG_REG; - - if (CIC_EXT_IS_ACTIVE_HI(cic_ext, hirq->eirq)) { - /* Interrupt: pin is now HI */ - CIC_EXT_SET_ACTIVE_LO(cic_ext, hirq->eirq); - hirq->handle_hi(hirq->data); - } else { - /* Interrupt: pin is now LO */ - CIC_EXT_SET_ACTIVE_HI(cic_ext, hirq->eirq); - hirq->handle_lo(hirq->data); - } - - /* - * Invert the POLARITY of this level interrupt to ack the interrupt - * Thus next state change will invoke the opposite message - */ - *CIC_EXT_CFG_REG = cic_ext; - - return IRQ_HANDLED; -} - -static int msp_hwbutton_register(struct hwbutton_interrupt *hirq) -{ - unsigned long cic_ext; - - if (hirq->handle_hi == NULL || hirq->handle_lo == NULL) - return -EINVAL; - - cic_ext = *CIC_EXT_CFG_REG; - CIC_EXT_SET_TRIGGER_LEVEL(cic_ext, hirq->eirq); - if (hirq->initial_state == HWBUTTON_HI) - CIC_EXT_SET_ACTIVE_LO(cic_ext, hirq->eirq); - else - CIC_EXT_SET_ACTIVE_HI(cic_ext, hirq->eirq); - *CIC_EXT_CFG_REG = cic_ext; - - return request_irq(hirq->irq, hwbutton_handler, 0, - hirq->name, hirq); -} - -static int __init msp_hwbutton_setup(void) -{ -#ifdef CONFIG_PMC_MSP7120_GW - msp_hwbutton_register(&softreset_sw); - msp_hwbutton_register(&standby_sw); -#endif - return 0; -} - -subsys_initcall(msp_hwbutton_setup); |