diff options
Diffstat (limited to 'arch/cris/arch-v32/drivers')
| -rw-r--r-- | arch/cris/arch-v32/drivers/gpio.c | 765 |
1 files changed, 0 insertions, 765 deletions
diff --git a/arch/cris/arch-v32/drivers/gpio.c b/arch/cris/arch-v32/drivers/gpio.c deleted file mode 100644 index d82c5c561135..000000000000 --- a/arch/cris/arch-v32/drivers/gpio.c +++ /dev/null @@ -1,765 +0,0 @@ -/* $Id: gpio.c,v 1.16 2005/06/19 17:06:49 starvik Exp $ - * - * ETRAX CRISv32 general port I/O device - * - * Copyright (c) 1999, 2000, 2001, 2002, 2003 Axis Communications AB - * - * Authors: Bjorn Wesen (initial version) - * Ola Knutsson (LED handling) - * Johan Adolfsson (read/set directions, write, port G, - * port to ETRAX FS. - * - * $Log: gpio.c,v $ - * Revision 1.16 2005/06/19 17:06:49 starvik - * Merge of Linux 2.6.12. - * - * Revision 1.15 2005/05/25 08:22:20 starvik - * Changed GPIO port order to fit packages/devices/axis-2.4. - * - * Revision 1.14 2005/04/24 18:35:08 starvik - * Updated with final register headers. - * - * Revision 1.13 2005/03/15 15:43:00 starvik - * dev_id needs to be supplied for shared IRQs. - * - * Revision 1.12 2005/03/10 17:12:00 starvik - * Protect alarm list with spinlock. - * - * Revision 1.11 2005/01/05 06:08:59 starvik - * No need to do local_irq_disable after local_irq_save. - * - * Revision 1.10 2004/11/19 08:38:31 starvik - * Removed old crap. - * - * Revision 1.9 2004/05/14 07:58:02 starvik - * Merge of changes from 2.4 - * - * Revision 1.8 2003/09/11 07:29:50 starvik - * Merge of Linux 2.6.0-test5 - * - * Revision 1.7 2003/07/10 13:25:46 starvik - * Compiles for 2.5.74 - * Lindented ethernet.c - * - * Revision 1.6 2003/07/04 08:27:46 starvik - * Merge of Linux 2.5.74 - * - * Revision 1.5 2003/06/10 08:26:37 johana - * Etrax -> ETRAX CRISv32 - * - * Revision 1.4 2003/06/05 14:22:48 johana - * Initialise some_alarms. - * - * Revision 1.3 2003/06/05 10:15:46 johana - * New INTR_VECT macros. - * Enable interrupts in global config. - * - * Revision 1.2 2003/06/03 15:52:50 johana - * Initial CRIS v32 version. - * - * Revision 1.1 2003/06/03 08:53:15 johana - * Copy of os/lx25/arch/cris/arch-v10/drivers/gpio.c version 1.7. - * - */ - - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/ioport.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/poll.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/spinlock.h> - -#include <asm/etraxgpio.h> -#include <asm/arch/hwregs/reg_map.h> -#include <asm/arch/hwregs/reg_rdwr.h> -#include <asm/arch/hwregs/gio_defs.h> -#include <asm/arch/hwregs/intr_vect_defs.h> -#include <asm/io.h> -#include <asm/system.h> -#include <asm/irq.h> - -/* The following gio ports on ETRAX FS is available: - * pa 8 bits, supports interrupts off, hi, low, set, posedge, negedge anyedge - * pb 18 bits - * pc 18 bits - * pd 18 bits - * pe 18 bits - * each port has a rw_px_dout, r_px_din and rw_px_oe register. - */ - -#define GPIO_MAJOR 120 /* experimental MAJOR number */ - -#define D(x) - -#if 0 -static int dp_cnt; -#define DP(x) do { dp_cnt++; if (dp_cnt % 1000 == 0) x; }while(0) -#else -#define DP(x) -#endif - -static char gpio_name[] = "etrax gpio"; - -#if 0 -static wait_queue_head_t *gpio_wq; -#endif - -static int gpio_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg); -static ssize_t gpio_write(struct file * file, const char * buf, size_t count, - loff_t *off); -static int gpio_open(struct inode *inode, struct file *filp); -static int gpio_release(struct inode *inode, struct file *filp); -static unsigned int gpio_poll(struct file *filp, struct poll_table_struct *wait); - -/* private data per open() of this driver */ - -struct gpio_private { - struct gpio_private *next; - /* The IO_CFG_WRITE_MODE_VALUE only support 8 bits: */ - unsigned char clk_mask; - unsigned char data_mask; - unsigned char write_msb; - unsigned char pad1; - /* These fields are generic */ - unsigned long highalarm, lowalarm; - wait_queue_head_t alarm_wq; - int minor; -}; - -/* linked list of alarms to check for */ - -static struct gpio_private *alarmlist = 0; - -static int gpio_some_alarms = 0; /* Set if someone uses alarm */ -static unsigned long gpio_pa_high_alarms = 0; -static unsigned long gpio_pa_low_alarms = 0; - -static DEFINE_SPINLOCK(alarm_lock); - -#define NUM_PORTS (GPIO_MINOR_LAST+1) -#define GIO_REG_RD_ADDR(reg) (volatile unsigned long*) (regi_gio + REG_RD_ADDR_gio_##reg ) -#define GIO_REG_WR_ADDR(reg) (volatile unsigned long*) (regi_gio + REG_RD_ADDR_gio_##reg ) -unsigned long led_dummy; - -static volatile unsigned long *data_out[NUM_PORTS] = { - GIO_REG_WR_ADDR(rw_pa_dout), - GIO_REG_WR_ADDR(rw_pb_dout), - &led_dummy, - GIO_REG_WR_ADDR(rw_pc_dout), - GIO_REG_WR_ADDR(rw_pd_dout), - GIO_REG_WR_ADDR(rw_pe_dout), -}; - -static volatile unsigned long *data_in[NUM_PORTS] = { - GIO_REG_RD_ADDR(r_pa_din), - GIO_REG_RD_ADDR(r_pb_din), - &led_dummy, - GIO_REG_RD_ADDR(r_pc_din), - GIO_REG_RD_ADDR(r_pd_din), - GIO_REG_RD_ADDR(r_pe_din), -}; - -static unsigned long changeable_dir[NUM_PORTS] = { - CONFIG_ETRAX_PA_CHANGEABLE_DIR, - CONFIG_ETRAX_PB_CHANGEABLE_DIR, - 0, - CONFIG_ETRAX_PC_CHANGEABLE_DIR, - CONFIG_ETRAX_PD_CHANGEABLE_DIR, - CONFIG_ETRAX_PE_CHANGEABLE_DIR, -}; - -static unsigned long changeable_bits[NUM_PORTS] = { - CONFIG_ETRAX_PA_CHANGEABLE_BITS, - CONFIG_ETRAX_PB_CHANGEABLE_BITS, - 0, - CONFIG_ETRAX_PC_CHANGEABLE_BITS, - CONFIG_ETRAX_PD_CHANGEABLE_BITS, - CONFIG_ETRAX_PE_CHANGEABLE_BITS, -}; - -static volatile unsigned long *dir_oe[NUM_PORTS] = { - GIO_REG_WR_ADDR(rw_pa_oe), - GIO_REG_WR_ADDR(rw_pb_oe), - &led_dummy, - GIO_REG_WR_ADDR(rw_pc_oe), - GIO_REG_WR_ADDR(rw_pd_oe), - GIO_REG_WR_ADDR(rw_pe_oe), -}; - - - -static unsigned int -gpio_poll(struct file *file, - poll_table *wait) -{ - unsigned int mask = 0; - struct gpio_private *priv = (struct gpio_private *)file->private_data; - unsigned long data; - poll_wait(file, &priv->alarm_wq, wait); - if (priv->minor == GPIO_MINOR_A) { - reg_gio_rw_intr_cfg intr_cfg; - unsigned long tmp; - unsigned long flags; - - local_irq_save(flags); - data = REG_TYPE_CONV(unsigned long, reg_gio_r_pa_din, REG_RD(gio, regi_gio, r_pa_din)); - /* PA has support for interrupt - * lets activate high for those low and with highalarm set - */ - intr_cfg = REG_RD(gio, regi_gio, rw_intr_cfg); - - tmp = ~data & priv->highalarm & 0xFF; - if (tmp & (1 << 0)) { - intr_cfg.pa0 = regk_gio_hi; - } - if (tmp & (1 << 1)) { - intr_cfg.pa1 = regk_gio_hi; - } - if (tmp & (1 << 2)) { - intr_cfg.pa2 = regk_gio_hi; - } - if (tmp & (1 << 3)) { - intr_cfg.pa3 = regk_gio_hi; - } - if (tmp & (1 << 4)) { - intr_cfg.pa4 = regk_gio_hi; - } - if (tmp & (1 << 5)) { - intr_cfg.pa5 = regk_gio_hi; - } - if (tmp & (1 << 6)) { - intr_cfg.pa6 = regk_gio_hi; - } - if (tmp & (1 << 7)) { - intr_cfg.pa7 = regk_gio_hi; - } - /* - * lets activate low for those high and with lowalarm set - */ - tmp = data & priv->lowalarm & 0xFF; - if (tmp & (1 << 0)) { - intr_cfg.pa0 = regk_gio_lo; - } - if (tmp & (1 << 1)) { - intr_cfg.pa1 = regk_gio_lo; - } - if (tmp & (1 << 2)) { - intr_cfg.pa2 = regk_gio_lo; - } - if (tmp & (1 << 3)) { - intr_cfg.pa3 = regk_gio_lo; - } - if (tmp & (1 << 4)) { - intr_cfg.pa4 = regk_gio_lo; - } - if (tmp & (1 << 5)) { - intr_cfg.pa5 = regk_gio_lo; - } - if (tmp & (1 << 6)) { - intr_cfg.pa6 = regk_gio_lo; - } - if (tmp & (1 << 7)) { - intr_cfg.pa7 = regk_gio_lo; - } - - REG_WR(gio, regi_gio, rw_intr_cfg, intr_cfg); - local_irq_restore(flags); - } else if (priv->minor <= GPIO_MINOR_E) - data = *data_in[priv->minor]; - else - return 0; - - if ((data & priv->highalarm) || - (~data & priv->lowalarm)) { - mask = POLLIN|POLLRDNORM; - } - - DP(printk("gpio_poll ready: mask 0x%08X\n", mask)); - return mask; -} - -int etrax_gpio_wake_up_check(void) -{ - struct gpio_private *priv = alarmlist; - unsigned long data = 0; - int ret = 0; - while (priv) { - data = *data_in[priv->minor]; - if ((data & priv->highalarm) || - (~data & priv->lowalarm)) { - DP(printk("etrax_gpio_wake_up_check %i\n",priv->minor)); - wake_up_interruptible(&priv->alarm_wq); - ret = 1; - } - priv = priv->next; - } - return ret; -} - -static irqreturn_t -gpio_poll_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - if (gpio_some_alarms) { - return IRQ_RETVAL(etrax_gpio_wake_up_check()); - } - return IRQ_NONE; -} - -static irqreturn_t -gpio_pa_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - reg_gio_rw_intr_mask intr_mask; - reg_gio_r_masked_intr masked_intr; - reg_gio_rw_ack_intr ack_intr; - unsigned long tmp; - unsigned long tmp2; - - /* Find what PA interrupts are active */ - masked_intr = REG_RD(gio, regi_gio, r_masked_intr); - tmp = REG_TYPE_CONV(unsigned long, reg_gio_r_masked_intr, masked_intr); - - /* Find those that we have enabled */ - spin_lock(&alarm_lock); - tmp &= (gpio_pa_high_alarms | gpio_pa_low_alarms); - spin_unlock(&alarm_lock); - - /* Ack them */ - ack_intr = REG_TYPE_CONV(reg_gio_rw_ack_intr, unsigned long, tmp); - REG_WR(gio, regi_gio, rw_ack_intr, ack_intr); - - /* Disable those interrupts.. */ - intr_mask = REG_RD(gio, regi_gio, rw_intr_mask); - tmp2 = REG_TYPE_CONV(unsigned long, reg_gio_rw_intr_mask, intr_mask); - tmp2 &= ~tmp; - intr_mask = REG_TYPE_CONV(reg_gio_rw_intr_mask, unsigned long, tmp2); - REG_WR(gio, regi_gio, rw_intr_mask, intr_mask); - - if (gpio_some_alarms) { - return IRQ_RETVAL(etrax_gpio_wake_up_check()); - } - return IRQ_NONE; -} - - -static ssize_t gpio_write(struct file * file, const char * buf, size_t count, - loff_t *off) -{ - struct gpio_private *priv = (struct gpio_private *)file->private_data; - unsigned char data, clk_mask, data_mask, write_msb; - unsigned long flags; - unsigned long shadow; - volatile unsigned long *port; - ssize_t retval = count; - /* Only bits 0-7 may be used for write operations but allow all - devices except leds... */ - if (priv->minor == GPIO_MINOR_LEDS) { - return -EFAULT; - } - - if (!access_ok(VERIFY_READ, buf, count)) { - return -EFAULT; - } - clk_mask = priv->clk_mask; - data_mask = priv->data_mask; - /* It must have been configured using the IO_CFG_WRITE_MODE */ - /* Perhaps a better error code? */ - if (clk_mask == 0 || data_mask == 0) { - return -EPERM; - } - write_msb = priv->write_msb; - D(printk("gpio_write: %lu to data 0x%02X clk 0x%02X msb: %i\n",count, data_mask, clk_mask, write_msb)); - port = data_out[priv->minor]; - - while (count--) { - int i; - data = *buf++; - if (priv->write_msb) { - for (i = 7; i >= 0;i--) { - local_irq_save(flags); - shadow = *port; - *port = shadow &= ~clk_mask; - if (data & 1<<i) - *port = shadow |= data_mask; - else - *port = shadow &= ~data_mask; - /* For FPGA: min 5.0ns (DCC) before CCLK high */ - *port = shadow |= clk_mask; - local_irq_restore(flags); - } - } else { - for (i = 0; i <= 7;i++) { - local_irq_save(flags); - shadow = *port; - *port = shadow &= ~clk_mask; - if (data & 1<<i) - *port = shadow |= data_mask; - else - *port = shadow &= ~data_mask; - /* For FPGA: min 5.0ns (DCC) before CCLK high */ - *port = shadow |= clk_mask; - local_irq_restore(flags); - } - } - } - return retval; -} - - - -static int -gpio_open(struct inode *inode, struct file *filp) -{ - struct gpio_private *priv; - int p = iminor(inode); - - if (p > GPIO_MINOR_LAST) - return -EINVAL; - - priv = kmalloc(sizeof(struct gpio_private), - GFP_KERNEL); - - if (!priv) - return -ENOMEM; - - priv->minor = p; - - /* initialize the io/alarm struct and link it into our alarmlist */ - - priv->next = alarmlist; - alarmlist = priv; - priv->clk_mask = 0; - priv->data_mask = 0; - priv->highalarm = 0; - priv->lowalarm = 0; - init_waitqueue_head(&priv->alarm_wq); - - filp->private_data = (void *)priv; - - return 0; -} - -static int -gpio_release(struct inode *inode, struct file *filp) -{ - struct gpio_private *p = alarmlist; - struct gpio_private *todel = (struct gpio_private *)filp->private_data; - /* local copies while updating them: */ - unsigned long a_high, a_low; - unsigned long some_alarms; - - /* unlink from alarmlist and free the private structure */ - - if (p == todel) { - alarmlist = todel->next; - } else { - while (p->next != todel) - p = p->next; - p->next = todel->next; - } - - kfree(todel); - /* Check if there are still any alarms set */ - p = alarmlist; - some_alarms = 0; - a_high = 0; - a_low = 0; - while (p) { - if (p->minor == GPIO_MINOR_A) { - a_high |= p->highalarm; - a_low |= p->lowalarm; - } - - if (p->highalarm | p->lowalarm) { - some_alarms = 1; - } - p = p->next; - } - - spin_lock(&alarm_lock); - gpio_some_alarms = some_alarms; - gpio_pa_high_alarms = a_high; - gpio_pa_low_alarms = a_low; - spin_unlock(&alarm_lock); - - return 0; -} - -/* Main device API. ioctl's to read/set/clear bits, as well as to - * set alarms to wait for using a subsequent select(). - */ - -unsigned long inline setget_input(struct gpio_private *priv, unsigned long arg) -{ - /* Set direction 0=unchanged 1=input, - * return mask with 1=input - */ - unsigned long flags; - unsigned long dir_shadow; - - local_irq_save(flags); - dir_shadow = *dir_oe[priv->minor]; - dir_shadow &= ~(arg & changeable_dir[priv->minor]); - *dir_oe[priv->minor] = dir_shadow; - local_irq_restore(flags); - - if (priv->minor == GPIO_MINOR_A) - dir_shadow ^= 0xFF; /* Only 8 bits */ - else - dir_shadow ^= 0x3FFFF; /* Only 18 bits */ - return dir_shadow; - -} /* setget_input */ - -unsigned long inline setget_output(struct gpio_private *priv, unsigned long arg) -{ - unsigned long flags; - unsigned long dir_shadow; - - local_irq_save(flags); - dir_shadow = *dir_oe[priv->minor]; - dir_shadow |= (arg & changeable_dir[priv->minor]); - *dir_oe[priv->minor] = dir_shadow; - local_irq_restore(flags); - return dir_shadow; -} /* setget_output */ - -static int -gpio_leds_ioctl(unsigned int cmd, unsigned long arg); - -static int -gpio_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - unsigned long flags; - unsigned long val; - unsigned long shadow; - struct gpio_private *priv = (struct gpio_private *)file->private_data; - if (_IOC_TYPE(cmd) != ETRAXGPIO_IOCTYPE) { - return -EINVAL; - } - - switch (_IOC_NR(cmd)) { - case IO_READBITS: /* Use IO_READ_INBITS and IO_READ_OUTBITS instead */ - // read the port - return *data_in[priv->minor]; - break; - case IO_SETBITS: - local_irq_save(flags); - if (arg & 0x04) - printk("GPIO SET 2\n"); - // set changeable bits with a 1 in arg - shadow = *data_out[priv->minor]; - shadow |= (arg & changeable_bits[priv->minor]); - *data_out[priv->minor] = shadow; - local_irq_restore(flags); - break; - case IO_CLRBITS: - local_irq_save(flags); - if (arg & 0x04) - printk("GPIO CLR 2\n"); - // clear changeable bits with a 1 in arg - shadow = *data_out[priv->minor]; - shadow &= ~(arg & changeable_bits[priv->minor]); - *data_out[priv->minor] = shadow; - local_irq_restore(flags); - break; - case IO_HIGHALARM: - // set alarm when bits with 1 in arg go high - priv->highalarm |= arg; - spin_lock(&alarm_lock); - gpio_some_alarms = 1; - if (priv->minor == GPIO_MINOR_A) { - gpio_pa_high_alarms |= arg; - } - spin_unlock(&alarm_lock); - break; - case IO_LOWALARM: - // set alarm when bits with 1 in arg go low - priv->lowalarm |= arg; - spin_lock(&alarm_lock); - gpio_some_alarms = 1; - if (priv->minor == GPIO_MINOR_A) { - gpio_pa_low_alarms |= arg; - } - spin_unlock(&alarm_lock); - break; - case IO_CLRALARM: - // clear alarm for bits with 1 in arg - priv->highalarm &= ~arg; - priv->lowalarm &= ~arg; - spin_lock(&alarm_lock); - if (priv->minor == GPIO_MINOR_A) { - if (gpio_pa_high_alarms & arg || - gpio_pa_low_alarms & arg) { - /* Must update the gpio_pa_*alarms masks */ - } - } - spin_unlock(&alarm_lock); - break; - case IO_READDIR: /* Use IO_SETGET_INPUT/OUTPUT instead! */ - /* Read direction 0=input 1=output */ - return *dir_oe[priv->minor]; - case IO_SETINPUT: /* Use IO_SETGET_INPUT instead! */ - /* Set direction 0=unchanged 1=input, - * return mask with 1=input - */ - return setget_input(priv, arg); - break; - case IO_SETOUTPUT: /* Use IO_SETGET_OUTPUT instead! */ - /* Set direction 0=unchanged 1=output, - * return mask with 1=output - */ - return setget_output(priv, arg); - - case IO_CFG_WRITE_MODE: - { - unsigned long dir_shadow; - dir_shadow = *dir_oe[priv->minor]; - - priv->clk_mask = arg & 0xFF; - priv->data_mask = (arg >> 8) & 0xFF; - priv->write_msb = (arg >> 16) & 0x01; - /* Check if we're allowed to change the bits and - * the direction is correct - */ - if (!((priv->clk_mask & changeable_bits[priv->minor]) && - (priv->data_mask & changeable_bits[priv->minor]) && - (priv->clk_mask & dir_shadow) && - (priv->data_mask & dir_shadow))) - { - priv->clk_mask = 0; - priv->data_mask = 0; - return -EPERM; - } - break; - } - case IO_READ_INBITS: - /* *arg is result of reading the input pins */ - val = *data_in[priv->minor]; - if (copy_to_user((unsigned long*)arg, &val, sizeof(val))) - return -EFAULT; - return 0; - break; - case IO_READ_OUTBITS: - /* *arg is result of reading the output shadow */ - val = *data_out[priv->minor]; - if (copy_to_user((unsigned long*)arg, &val, sizeof(val))) - return -EFAULT; - break; - case IO_SETGET_INPUT: - /* bits set in *arg is set to input, - * *arg updated with current input pins. - */ - if (copy_from_user(&val, (unsigned long*)arg, sizeof(val))) - return -EFAULT; - val = setget_input(priv, val); - if (copy_to_user((unsigned long*)arg, &val, sizeof(val))) - return -EFAULT; - break; - case IO_SETGET_OUTPUT: - /* bits set in *arg is set to output, - * *arg updated with current output pins. - */ - if (copy_from_user(&val, (unsigned long*)arg, sizeof(val))) - return -EFAULT; - val = setget_output(priv, val); - if (copy_to_user((unsigned long*)arg, &val, sizeof(val))) - return -EFAULT; - break; - default: - if (priv->minor == GPIO_MINOR_LEDS) - return gpio_leds_ioctl(cmd, arg); - else - return -EINVAL; - } /* switch */ - - return 0; -} - -static int -gpio_leds_ioctl(unsigned int cmd, unsigned long arg) -{ - unsigned char green; - unsigned char red; - - switch (_IOC_NR(cmd)) { - case IO_LEDACTIVE_SET: - green = ((unsigned char) arg) & 1; - red = (((unsigned char) arg) >> 1) & 1; - LED_ACTIVE_SET_G(green); - LED_ACTIVE_SET_R(red); - break; - - default: - return -EINVAL; - } /* switch */ - - return 0; -} - -const struct file_operations gpio_fops = { - .owner = THIS_MODULE, - .poll = gpio_poll, - .ioctl = gpio_ioctl, - .write = gpio_write, - .open = gpio_open, - .release = gpio_release, -}; - - -/* main driver initialization routine, called from mem.c */ - -static __init int -gpio_init(void) -{ - int res; - reg_intr_vect_rw_mask intr_mask; - - /* do the formalities */ - - res = register_chrdev(GPIO_MAJOR, gpio_name, &gpio_fops); - if (res < 0) { - printk(KERN_ERR "gpio: couldn't get a major number.\n"); - return res; - } - - /* Clear all leds */ - LED_NETWORK_SET(0); - LED_ACTIVE_SET(0); - LED_DISK_READ(0); - LED_DISK_WRITE(0); - - printk("ETRAX FS GPIO driver v2.5, (c) 2003-2005 Axis Communications AB\n"); - /* We call etrax_gpio_wake_up_check() from timer interrupt and - * from cpu_idle() in kernel/process.c - * The check in cpu_idle() reduces latency from ~15 ms to ~6 ms - * in some tests. - */ - if (request_irq(TIMER_INTR_VECT, gpio_poll_timer_interrupt, - IRQF_SHARED | IRQF_DISABLED,"gpio poll", &alarmlist)) { - printk("err: timer0 irq for gpio\n"); - } - if (request_irq(GEN_IO_INTR_VECT, gpio_pa_interrupt, - IRQF_SHARED | IRQF_DISABLED,"gpio PA", &alarmlist)) { - printk("err: PA irq for gpio\n"); - } - /* enable the gio and timer irq in global config */ - intr_mask = REG_RD(intr_vect, regi_irq, rw_mask); - intr_mask.timer = 1; - intr_mask.gen_io = 1; - REG_WR(intr_vect, regi_irq, rw_mask, intr_mask); - - return res; -} - -/* this makes sure that gpio_init is called during kernel boot */ - -module_init(gpio_init); |