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drivers/char/tlclk.c
23.4 KB
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/* * Telecom Clock driver for Intel NetStructure(tm) MPCBL0010 * * Copyright (C) 2005 Kontron Canada * * All rights reserved. * * 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 program 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, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * 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. * * Send feedback to <sebastien.bouchard@ca.kontron.com> and the current * Maintainer <mark.gross@intel.com> * * Description : This is the TELECOM CLOCK module driver for the ATCA * MPCBL0010 ATCA computer. */ |
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#include <linux/module.h> #include <linux/init.h> |
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#include <linux/kernel.h> /* printk() */ #include <linux/fs.h> /* everything... */ #include <linux/errno.h> /* error codes */ |
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#include <linux/sched.h> |
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#include <linux/slab.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/spinlock.h> |
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#include <linux/mutex.h> |
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#include <linux/timer.h> #include <linux/sysfs.h> #include <linux/device.h> #include <linux/miscdevice.h> |
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#include <linux/platform_device.h> |
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#include <asm/io.h> /* inb/outb */ #include <asm/uaccess.h> MODULE_AUTHOR("Sebastien Bouchard <sebastien.bouchard@ca.kontron.com>"); MODULE_LICENSE("GPL"); /*Hardware Reset of the PLL */ #define RESET_ON 0x00 #define RESET_OFF 0x01 /* MODE SELECT */ #define NORMAL_MODE 0x00 #define HOLDOVER_MODE 0x10 #define FREERUN_MODE 0x20 /* FILTER SELECT */ #define FILTER_6HZ 0x04 #define FILTER_12HZ 0x00 /* SELECT REFERENCE FREQUENCY */ #define REF_CLK1_8kHz 0x00 #define REF_CLK2_19_44MHz 0x02 /* Select primary or secondary redundant clock */ #define PRIMARY_CLOCK 0x00 #define SECONDARY_CLOCK 0x01 /* CLOCK TRANSMISSION DEFINE */ #define CLK_8kHz 0xff #define CLK_16_384MHz 0xfb #define CLK_1_544MHz 0x00 #define CLK_2_048MHz 0x01 #define CLK_4_096MHz 0x02 #define CLK_6_312MHz 0x03 #define CLK_8_192MHz 0x04 #define CLK_19_440MHz 0x06 #define CLK_8_592MHz 0x08 #define CLK_11_184MHz 0x09 #define CLK_34_368MHz 0x0b #define CLK_44_736MHz 0x0a /* RECEIVED REFERENCE */ #define AMC_B1 0 #define AMC_B2 1 /* HARDWARE SWITCHING DEFINE */ #define HW_ENABLE 0x80 #define HW_DISABLE 0x00 /* HARDWARE SWITCHING MODE DEFINE */ #define PLL_HOLDOVER 0x40 #define LOST_CLOCK 0x00 /* ALARMS DEFINE */ #define UNLOCK_MASK 0x10 #define HOLDOVER_MASK 0x20 #define SEC_LOST_MASK 0x40 #define PRI_LOST_MASK 0x80 /* INTERRUPT CAUSE DEFINE */ #define PRI_LOS_01_MASK 0x01 #define PRI_LOS_10_MASK 0x02 #define SEC_LOS_01_MASK 0x04 #define SEC_LOS_10_MASK 0x08 #define HOLDOVER_01_MASK 0x10 #define HOLDOVER_10_MASK 0x20 #define UNLOCK_01_MASK 0x40 #define UNLOCK_10_MASK 0x80 struct tlclk_alarms { __u32 lost_clocks; __u32 lost_primary_clock; __u32 lost_secondary_clock; __u32 primary_clock_back; __u32 secondary_clock_back; __u32 switchover_primary; __u32 switchover_secondary; __u32 pll_holdover; __u32 pll_end_holdover; __u32 pll_lost_sync; __u32 pll_sync; }; /* Telecom clock I/O register definition */ #define TLCLK_BASE 0xa08 #define TLCLK_REG0 TLCLK_BASE #define TLCLK_REG1 (TLCLK_BASE+1) #define TLCLK_REG2 (TLCLK_BASE+2) #define TLCLK_REG3 (TLCLK_BASE+3) #define TLCLK_REG4 (TLCLK_BASE+4) #define TLCLK_REG5 (TLCLK_BASE+5) #define TLCLK_REG6 (TLCLK_BASE+6) #define TLCLK_REG7 (TLCLK_BASE+7) #define SET_PORT_BITS(port, mask, val) outb(((inb(port) & mask) | val), port) /* 0 = Dynamic allocation of the major device number */ #define TLCLK_MAJOR 0 /* sysfs interface definition: Upon loading the driver will create a sysfs directory under /sys/devices/platform/telco_clock. This directory exports the following interfaces. There operation is documented in the MCPBL0010 TPS under the Telecom Clock API section, 11.4. alarms : current_ref : |
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received_ref_clk3a : received_ref_clk3b : |
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enable_clk3a_output : enable_clk3b_output : enable_clka0_output : enable_clka1_output : enable_clkb0_output : enable_clkb1_output : filter_select : hardware_switching : hardware_switching_mode : |
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telclock_version : |
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mode_select : refalign : reset : select_amcb1_transmit_clock : select_amcb2_transmit_clock : select_redundant_clock : select_ref_frequency : |
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All sysfs interfaces are integers in hex format, i.e echo 99 > refalign has the same effect as echo 0x99 > refalign. */ static unsigned int telclk_interrupt; static int int_events; /* Event that generate a interrupt */ static int got_event; /* if events processing have been done */ static void switchover_timeout(unsigned long data); static struct timer_list switchover_timer = TIMER_INITIALIZER(switchover_timeout , 0, 0); |
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static unsigned long tlclk_timer_data; |
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static struct tlclk_alarms *alarm_events; static DEFINE_SPINLOCK(event_lock); static int tlclk_major = TLCLK_MAJOR; |
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static irqreturn_t tlclk_interrupt(int irq, void *dev_id); |
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static DECLARE_WAIT_QUEUE_HEAD(wq); |
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static unsigned long useflags; static DEFINE_MUTEX(tlclk_mutex); |
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static int tlclk_open(struct inode *inode, struct file *filp) { int result; |
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mutex_lock(&tlclk_mutex); |
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if (test_and_set_bit(0, &useflags)) { result = -EBUSY; |
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/* this legacy device is always one per system and it doesn't * know how to handle multiple concurrent clients. */ |
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goto out; } |
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/* Make sure there is no interrupt pending while * initialising interrupt handler */ inb(TLCLK_REG6); /* This device is wired through the FPGA IO space of the ATCA blade * we can't share this IRQ */ result = request_irq(telclk_interrupt, &tlclk_interrupt, |
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0, "telco_clock", tlclk_interrupt); |
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if (result == -EBUSY) |
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printk(KERN_ERR "tlclk: Interrupt can't be reserved. "); |
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else inb(TLCLK_REG6); /* Clear interrupt events */ |
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out: |
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mutex_unlock(&tlclk_mutex); |
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return result; |
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} static int tlclk_release(struct inode *inode, struct file *filp) { free_irq(telclk_interrupt, tlclk_interrupt); |
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clear_bit(0, &useflags); |
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return 0; } |
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static ssize_t tlclk_read(struct file *filp, char __user *buf, size_t count, |
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loff_t *f_pos) { if (count < sizeof(struct tlclk_alarms)) return -EIO; |
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if (mutex_lock_interruptible(&tlclk_mutex)) return -EINTR; |
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wait_event_interruptible(wq, got_event); |
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if (copy_to_user(buf, alarm_events, sizeof(struct tlclk_alarms))) { mutex_unlock(&tlclk_mutex); |
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return -EFAULT; |
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} |
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memset(alarm_events, 0, sizeof(struct tlclk_alarms)); got_event = 0; |
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mutex_unlock(&tlclk_mutex); |
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return sizeof(struct tlclk_alarms); } |
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static const struct file_operations tlclk_fops = { |
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.read = tlclk_read, |
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.open = tlclk_open, .release = tlclk_release, |
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.llseek = noop_llseek, |
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}; static struct miscdevice tlclk_miscdev = { .minor = MISC_DYNAMIC_MINOR, .name = "telco_clock", .fops = &tlclk_fops, }; static ssize_t show_current_ref(struct device *d, struct device_attribute *attr, char *buf) { unsigned long ret_val; unsigned long flags; spin_lock_irqsave(&event_lock, flags); ret_val = ((inb(TLCLK_REG1) & 0x08) >> 3); spin_unlock_irqrestore(&event_lock, flags); return sprintf(buf, "0x%lX ", ret_val); } static DEVICE_ATTR(current_ref, S_IRUGO, show_current_ref, NULL); |
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static ssize_t show_telclock_version(struct device *d, |
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struct device_attribute *attr, char *buf) { unsigned long ret_val; unsigned long flags; spin_lock_irqsave(&event_lock, flags); |
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ret_val = inb(TLCLK_REG5); |
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spin_unlock_irqrestore(&event_lock, flags); return sprintf(buf, "0x%lX ", ret_val); } |
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static DEVICE_ATTR(telclock_version, S_IRUGO, show_telclock_version, NULL); |
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static ssize_t show_alarms(struct device *d, struct device_attribute *attr, char *buf) { unsigned long ret_val; unsigned long flags; spin_lock_irqsave(&event_lock, flags); ret_val = (inb(TLCLK_REG2) & 0xf0); spin_unlock_irqrestore(&event_lock, flags); return sprintf(buf, "0x%lX ", ret_val); } static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
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static ssize_t store_received_ref_clk3a(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, ": tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG1, 0xef, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(received_ref_clk3a, (S_IWUSR|S_IWGRP), NULL, |
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store_received_ref_clk3a); static ssize_t store_received_ref_clk3b(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, ": tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG1, 0xdf, val << 1); |
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spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(received_ref_clk3b, (S_IWUSR|S_IWGRP), NULL, |
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store_received_ref_clk3b); |
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static ssize_t store_enable_clk3b_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, ": tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG3, 0x7f, val << 7); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clk3b_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clk3b_output); static ssize_t store_enable_clk3a_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG3, 0xbf, val << 6); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clk3a_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clk3a_output); static ssize_t store_enable_clkb1_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG2, 0xf7, val << 3); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clkb1_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clkb1_output); static ssize_t store_enable_clka1_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG2, 0xfb, val << 2); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clka1_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clka1_output); static ssize_t store_enable_clkb0_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG2, 0xfd, val << 1); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clkb0_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clkb0_output); static ssize_t store_enable_clka0_output(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG2, 0xfe, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(enable_clka0_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clka0_output); |
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static ssize_t store_select_amcb2_transmit_clock(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long flags; unsigned long tmp; unsigned char val; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); if ((val == CLK_8kHz) || (val == CLK_16_384MHz)) { SET_PORT_BITS(TLCLK_REG3, 0xc7, 0x28); SET_PORT_BITS(TLCLK_REG1, 0xfb, ~val); } else if (val >= CLK_8_592MHz) { SET_PORT_BITS(TLCLK_REG3, 0xc7, 0x38); switch (val) { case CLK_8_592MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 2); |
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break; case CLK_11_184MHz: SET_PORT_BITS(TLCLK_REG0, 0xfc, 0); break; case CLK_34_368MHz: SET_PORT_BITS(TLCLK_REG0, 0xfc, 3); break; case CLK_44_736MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 1); |
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break; } } else SET_PORT_BITS(TLCLK_REG3, 0xc7, val << 3); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(select_amcb2_transmit_clock, (S_IWUSR|S_IWGRP), NULL, |
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store_select_amcb2_transmit_clock); static ssize_t store_select_amcb1_transmit_clock(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); if ((val == CLK_8kHz) || (val == CLK_16_384MHz)) { SET_PORT_BITS(TLCLK_REG3, 0xf8, 0x5); SET_PORT_BITS(TLCLK_REG1, 0xfb, ~val); } else if (val >= CLK_8_592MHz) { SET_PORT_BITS(TLCLK_REG3, 0xf8, 0x7); switch (val) { case CLK_8_592MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 2); |
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break; case CLK_11_184MHz: SET_PORT_BITS(TLCLK_REG0, 0xfc, 0); break; case CLK_34_368MHz: SET_PORT_BITS(TLCLK_REG0, 0xfc, 3); break; case CLK_44_736MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 1); |
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break; } } else SET_PORT_BITS(TLCLK_REG3, 0xf8, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(select_amcb1_transmit_clock, (S_IWUSR|S_IWGRP), NULL, |
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store_select_amcb1_transmit_clock); static ssize_t store_select_redundant_clock(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG1, 0xfe, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(select_redundant_clock, (S_IWUSR|S_IWGRP), NULL, |
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store_select_redundant_clock); static ssize_t store_select_ref_frequency(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG1, 0xfd, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
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static DEVICE_ATTR(select_ref_frequency, (S_IWUSR|S_IWGRP), NULL, |
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store_select_ref_frequency); static ssize_t store_filter_select(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG0, 0xfb, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
629 |
static DEVICE_ATTR(filter_select, (S_IWUSR|S_IWGRP), NULL, store_filter_select); |
1a80ba882 [PATCH] Telecom C... |
630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 |
static ssize_t store_hardware_switching_mode(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG0, 0xbf, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
649 |
static DEVICE_ATTR(hardware_switching_mode, (S_IWUSR|S_IWGRP), NULL, |
1a80ba882 [PATCH] Telecom C... |
650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 |
store_hardware_switching_mode); static ssize_t store_hardware_switching(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG0, 0x7f, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
670 |
static DEVICE_ATTR(hardware_switching, (S_IWUSR|S_IWGRP), NULL, |
1a80ba882 [PATCH] Telecom C... |
671 672 673 674 675 676 677 678 679 680 681 682 683 |
store_hardware_switching); static ssize_t store_refalign (struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG0, 0xf7, 0); |
1a80ba882 [PATCH] Telecom C... |
684 |
SET_PORT_BITS(TLCLK_REG0, 0xf7, 0x08); |
1a80ba882 [PATCH] Telecom C... |
685 686 687 688 689 |
SET_PORT_BITS(TLCLK_REG0, 0xf7, 0); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
690 |
static DEVICE_ATTR(refalign, (S_IWUSR|S_IWGRP), NULL, store_refalign); |
1a80ba882 [PATCH] Telecom C... |
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 |
static ssize_t store_mode_select (struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG0, 0xcf, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
710 |
static DEVICE_ATTR(mode_select, (S_IWUSR|S_IWGRP), NULL, store_mode_select); |
1a80ba882 [PATCH] Telecom C... |
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 |
static ssize_t store_reset (struct device *d, struct device_attribute *attr, const char *buf, size_t count) { unsigned long tmp; unsigned char val; unsigned long flags; sscanf(buf, "%lX", &tmp); dev_dbg(d, "tmp = 0x%lX ", tmp); val = (unsigned char)tmp; spin_lock_irqsave(&event_lock, flags); SET_PORT_BITS(TLCLK_REG4, 0xfd, val); spin_unlock_irqrestore(&event_lock, flags); return strnlen(buf, count); } |
31cc48bfe [PATCH] MPBL0010 ... |
730 |
static DEVICE_ATTR(reset, (S_IWUSR|S_IWGRP), NULL, store_reset); |
1a80ba882 [PATCH] Telecom C... |
731 732 733 |
static struct attribute *tlclk_sysfs_entries[] = { &dev_attr_current_ref.attr, |
648bf4fb2 [PATCH] tlclk dri... |
734 |
&dev_attr_telclock_version.attr, |
1a80ba882 [PATCH] Telecom C... |
735 |
&dev_attr_alarms.attr, |
648bf4fb2 [PATCH] tlclk dri... |
736 737 |
&dev_attr_received_ref_clk3a.attr, &dev_attr_received_ref_clk3b.attr, |
1a80ba882 [PATCH] Telecom C... |
738 739 740 741 742 743 |
&dev_attr_enable_clk3a_output.attr, &dev_attr_enable_clk3b_output.attr, &dev_attr_enable_clkb1_output.attr, &dev_attr_enable_clka1_output.attr, &dev_attr_enable_clkb0_output.attr, &dev_attr_enable_clka0_output.attr, |
1a80ba882 [PATCH] Telecom C... |
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 |
&dev_attr_select_amcb1_transmit_clock.attr, &dev_attr_select_amcb2_transmit_clock.attr, &dev_attr_select_redundant_clock.attr, &dev_attr_select_ref_frequency.attr, &dev_attr_filter_select.attr, &dev_attr_hardware_switching_mode.attr, &dev_attr_hardware_switching.attr, &dev_attr_refalign.attr, &dev_attr_mode_select.attr, &dev_attr_reset.attr, NULL }; static struct attribute_group tlclk_attribute_group = { .name = NULL, /* put in device directory */ .attrs = tlclk_sysfs_entries, }; static struct platform_device *tlclk_device; static int __init tlclk_init(void) { int ret; ret = register_chrdev(tlclk_major, "telco_clock", &tlclk_fops); if (ret < 0) { |
4ab2495a3 [PATCH] tclk: fix... |
770 771 |
printk(KERN_ERR "tlclk: can't get major %d. ", tlclk_major); |
1a80ba882 [PATCH] Telecom C... |
772 773 |
return ret; } |
222b9f933 [PATCH] tlclk: fi... |
774 |
tlclk_major = ret; |
1a80ba882 [PATCH] Telecom C... |
775 |
alarm_events = kzalloc( sizeof(struct tlclk_alarms), GFP_KERNEL); |
e045907c0 drivers/char/tlcl... |
776 777 |
if (!alarm_events) { ret = -ENOMEM; |
1a80ba882 [PATCH] Telecom C... |
778 |
goto out1; |
e045907c0 drivers/char/tlcl... |
779 |
} |
1a80ba882 [PATCH] Telecom C... |
780 781 782 |
/* Read telecom clock IRQ number (Set by BIOS) */ if (!request_region(TLCLK_BASE, 8, "telco_clock")) { |
4ab2495a3 [PATCH] tclk: fix... |
783 784 |
printk(KERN_ERR "tlclk: request_region 0x%X failed. ", |
1a80ba882 [PATCH] Telecom C... |
785 786 787 788 789 790 791 |
TLCLK_BASE); ret = -EBUSY; goto out2; } telclk_interrupt = (inb(TLCLK_REG7) & 0x0f); if (0x0F == telclk_interrupt ) { /* not MCPBL0010 ? */ |
838d51bfa char: Fix typo in... |
792 793 |
printk(KERN_ERR "telclk_interrupt = 0x%x non-mcpbl0010 hw. ", |
1a80ba882 [PATCH] Telecom C... |
794 795 796 797 798 799 800 801 802 |
telclk_interrupt); ret = -ENXIO; goto out3; } init_timer(&switchover_timer); ret = misc_register(&tlclk_miscdev); if (ret < 0) { |
4ab2495a3 [PATCH] tclk: fix... |
803 804 |
printk(KERN_ERR "tlclk: misc_register returns %d. ", ret); |
1a80ba882 [PATCH] Telecom C... |
805 806 807 808 809 |
goto out3; } tlclk_device = platform_device_register_simple("telco_clock", -1, NULL, 0); |
5e66b0b5f [PATCH] tlclk: fi... |
810 |
if (IS_ERR(tlclk_device)) { |
4ab2495a3 [PATCH] tclk: fix... |
811 812 |
printk(KERN_ERR "tlclk: platform_device_register failed. "); |
5e66b0b5f [PATCH] tlclk: fi... |
813 |
ret = PTR_ERR(tlclk_device); |
1a80ba882 [PATCH] Telecom C... |
814 815 816 817 818 819 |
goto out4; } ret = sysfs_create_group(&tlclk_device->dev.kobj, &tlclk_attribute_group); if (ret) { |
4ab2495a3 [PATCH] tclk: fix... |
820 821 |
printk(KERN_ERR "tlclk: failed to create sysfs device attributes. "); |
1a80ba882 [PATCH] Telecom C... |
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 |
goto out5; } return 0; out5: platform_device_unregister(tlclk_device); out4: misc_deregister(&tlclk_miscdev); out3: release_region(TLCLK_BASE, 8); out2: kfree(alarm_events); out1: unregister_chrdev(tlclk_major, "telco_clock"); return ret; } static void __exit tlclk_cleanup(void) { sysfs_remove_group(&tlclk_device->dev.kobj, &tlclk_attribute_group); platform_device_unregister(tlclk_device); misc_deregister(&tlclk_miscdev); unregister_chrdev(tlclk_major, "telco_clock"); release_region(TLCLK_BASE, 8); del_timer_sync(&switchover_timer); kfree(alarm_events); } static void switchover_timeout(unsigned long data) { |
79603a350 [PATCH] tlclk: bu... |
854 855 856 857 |
unsigned long flags = *(unsigned long *) data; if ((flags & 1)) { if ((inb(TLCLK_REG1) & 0x08) != (flags & 0x08)) |
1a80ba882 [PATCH] Telecom C... |
858 859 |
alarm_events->switchover_primary++; } else { |
79603a350 [PATCH] tlclk: bu... |
860 |
if ((inb(TLCLK_REG1) & 0x08) != (flags & 0x08)) |
1a80ba882 [PATCH] Telecom C... |
861 862 863 864 865 866 867 868 |
alarm_events->switchover_secondary++; } /* Alarm processing is done, wake up read task */ del_timer(&switchover_timer); got_event = 1; wake_up(&wq); } |
7d12e780e IRQ: Maintain reg... |
869 |
static irqreturn_t tlclk_interrupt(int irq, void *dev_id) |
1a80ba882 [PATCH] Telecom C... |
870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 |
{ unsigned long flags; spin_lock_irqsave(&event_lock, flags); /* Read and clear interrupt events */ int_events = inb(TLCLK_REG6); /* Primary_Los changed from 0 to 1 ? */ if (int_events & PRI_LOS_01_MASK) { if (inb(TLCLK_REG2) & SEC_LOST_MASK) alarm_events->lost_clocks++; else alarm_events->lost_primary_clock++; } /* Primary_Los changed from 1 to 0 ? */ if (int_events & PRI_LOS_10_MASK) { alarm_events->primary_clock_back++; SET_PORT_BITS(TLCLK_REG1, 0xFE, 1); } /* Secondary_Los changed from 0 to 1 ? */ if (int_events & SEC_LOS_01_MASK) { if (inb(TLCLK_REG2) & PRI_LOST_MASK) alarm_events->lost_clocks++; else alarm_events->lost_secondary_clock++; } /* Secondary_Los changed from 1 to 0 ? */ if (int_events & SEC_LOS_10_MASK) { alarm_events->secondary_clock_back++; SET_PORT_BITS(TLCLK_REG1, 0xFE, 0); } if (int_events & HOLDOVER_10_MASK) alarm_events->pll_end_holdover++; if (int_events & UNLOCK_01_MASK) alarm_events->pll_lost_sync++; if (int_events & UNLOCK_10_MASK) alarm_events->pll_sync++; /* Holdover changed from 0 to 1 ? */ if (int_events & HOLDOVER_01_MASK) { alarm_events->pll_holdover++; /* TIMEOUT in ~10ms */ switchover_timer.expires = jiffies + msecs_to_jiffies(10); |
79603a350 [PATCH] tlclk: bu... |
917 918 919 |
tlclk_timer_data = inb(TLCLK_REG1); switchover_timer.data = (unsigned long) &tlclk_timer_data; mod_timer(&switchover_timer, switchover_timer.expires); |
1a80ba882 [PATCH] Telecom C... |
920 921 922 923 924 925 926 927 928 929 930 |
} else { got_event = 1; wake_up(&wq); } spin_unlock_irqrestore(&event_lock, flags); return IRQ_HANDLED; } module_init(tlclk_init); module_exit(tlclk_cleanup); |