| /* |
| * 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. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> /* printk() */ |
| #include <linux/fs.h> /* everything... */ |
| #include <linux/errno.h> /* error codes */ |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <linux/smp_lock.h> |
| #include <linux/timer.h> |
| #include <linux/sysfs.h> |
| #include <linux/device.h> |
| #include <linux/miscdevice.h> |
| #include <linux/platform_device.h> |
| #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 : |
| received_ref_clk3a : |
| received_ref_clk3b : |
| 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 : |
| telclock_version : |
| mode_select : |
| refalign : |
| reset : |
| select_amcb1_transmit_clock : |
| select_amcb2_transmit_clock : |
| select_redundant_clock : |
| select_ref_frequency : |
| |
| 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); |
| static unsigned long tlclk_timer_data; |
| |
| static struct tlclk_alarms *alarm_events; |
| |
| static DEFINE_SPINLOCK(event_lock); |
| |
| static int tlclk_major = TLCLK_MAJOR; |
| |
| static irqreturn_t tlclk_interrupt(int irq, void *dev_id); |
| |
| static DECLARE_WAIT_QUEUE_HEAD(wq); |
| |
| static unsigned long useflags; |
| static DEFINE_MUTEX(tlclk_mutex); |
| |
| static int tlclk_open(struct inode *inode, struct file *filp) |
| { |
| int result; |
| |
| lock_kernel(); |
| if (test_and_set_bit(0, &useflags)) { |
| result = -EBUSY; |
| /* this legacy device is always one per system and it doesn't |
| * know how to handle multiple concurrent clients. |
| */ |
| goto out; |
| } |
| |
| /* 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, |
| IRQF_DISABLED, "telco_clock", tlclk_interrupt); |
| if (result == -EBUSY) |
| printk(KERN_ERR "tlclk: Interrupt can't be reserved.\n"); |
| else |
| inb(TLCLK_REG6); /* Clear interrupt events */ |
| |
| out: |
| unlock_kernel(); |
| return result; |
| } |
| |
| static int tlclk_release(struct inode *inode, struct file *filp) |
| { |
| free_irq(telclk_interrupt, tlclk_interrupt); |
| clear_bit(0, &useflags); |
| |
| return 0; |
| } |
| |
| static ssize_t tlclk_read(struct file *filp, char __user *buf, size_t count, |
| loff_t *f_pos) |
| { |
| if (count < sizeof(struct tlclk_alarms)) |
| return -EIO; |
| if (mutex_lock_interruptible(&tlclk_mutex)) |
| return -EINTR; |
| |
| |
| wait_event_interruptible(wq, got_event); |
| if (copy_to_user(buf, alarm_events, sizeof(struct tlclk_alarms))) { |
| mutex_unlock(&tlclk_mutex); |
| return -EFAULT; |
| } |
| |
| memset(alarm_events, 0, sizeof(struct tlclk_alarms)); |
| got_event = 0; |
| |
| mutex_unlock(&tlclk_mutex); |
| return sizeof(struct tlclk_alarms); |
| } |
| |
| static const struct file_operations tlclk_fops = { |
| .read = tlclk_read, |
| .open = tlclk_open, |
| .release = tlclk_release, |
| .llseek = noop_llseek, |
| |
| }; |
| |
| 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\n", ret_val); |
| } |
| |
| static DEVICE_ATTR(current_ref, S_IRUGO, show_current_ref, NULL); |
| |
| |
| static ssize_t show_telclock_version(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_REG5); |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return sprintf(buf, "0x%lX\n", ret_val); |
| } |
| |
| static DEVICE_ATTR(telclock_version, S_IRUGO, |
| show_telclock_version, NULL); |
| |
| 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\n", ret_val); |
| } |
| |
| static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(received_ref_clk3a, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", tmp); |
| |
| val = (unsigned char)tmp; |
| spin_lock_irqsave(&event_lock, flags); |
| SET_PORT_BITS(TLCLK_REG1, 0xdf, val << 1); |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return strnlen(buf, count); |
| } |
| |
| static DEVICE_ATTR(received_ref_clk3b, (S_IWUSR|S_IWGRP), NULL, |
| store_received_ref_clk3b); |
| |
| |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clk3b_output, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clk3a_output, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clkb1_output, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clka1_output, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clkb0_output, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(enable_clka0_output, (S_IWUSR|S_IWGRP), NULL, |
| store_enable_clka0_output); |
| |
| 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\n", 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: |
| SET_PORT_BITS(TLCLK_REG0, 0xfc, 2); |
| 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: |
| SET_PORT_BITS(TLCLK_REG0, 0xfc, 1); |
| break; |
| } |
| } else |
| SET_PORT_BITS(TLCLK_REG3, 0xc7, val << 3); |
| |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return strnlen(buf, count); |
| } |
| |
| static DEVICE_ATTR(select_amcb2_transmit_clock, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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: |
| SET_PORT_BITS(TLCLK_REG0, 0xfc, 2); |
| 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: |
| SET_PORT_BITS(TLCLK_REG0, 0xfc, 1); |
| break; |
| } |
| } else |
| SET_PORT_BITS(TLCLK_REG3, 0xf8, val); |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return strnlen(buf, count); |
| } |
| |
| static DEVICE_ATTR(select_amcb1_transmit_clock, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(select_redundant_clock, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(select_ref_frequency, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(filter_select, (S_IWUSR|S_IWGRP), NULL, store_filter_select); |
| |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(hardware_switching_mode, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(hardware_switching, (S_IWUSR|S_IWGRP), NULL, |
| 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\n", tmp); |
| spin_lock_irqsave(&event_lock, flags); |
| SET_PORT_BITS(TLCLK_REG0, 0xf7, 0); |
| SET_PORT_BITS(TLCLK_REG0, 0xf7, 0x08); |
| SET_PORT_BITS(TLCLK_REG0, 0xf7, 0); |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return strnlen(buf, count); |
| } |
| |
| static DEVICE_ATTR(refalign, (S_IWUSR|S_IWGRP), NULL, store_refalign); |
| |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(mode_select, (S_IWUSR|S_IWGRP), NULL, store_mode_select); |
| |
| 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\n", 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); |
| } |
| |
| static DEVICE_ATTR(reset, (S_IWUSR|S_IWGRP), NULL, store_reset); |
| |
| static struct attribute *tlclk_sysfs_entries[] = { |
| &dev_attr_current_ref.attr, |
| &dev_attr_telclock_version.attr, |
| &dev_attr_alarms.attr, |
| &dev_attr_received_ref_clk3a.attr, |
| &dev_attr_received_ref_clk3b.attr, |
| &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, |
| &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) { |
| printk(KERN_ERR "tlclk: can't get major %d.\n", tlclk_major); |
| return ret; |
| } |
| tlclk_major = ret; |
| alarm_events = kzalloc( sizeof(struct tlclk_alarms), GFP_KERNEL); |
| if (!alarm_events) |
| goto out1; |
| |
| /* Read telecom clock IRQ number (Set by BIOS) */ |
| if (!request_region(TLCLK_BASE, 8, "telco_clock")) { |
| printk(KERN_ERR "tlclk: request_region 0x%X failed.\n", |
| TLCLK_BASE); |
| ret = -EBUSY; |
| goto out2; |
| } |
| telclk_interrupt = (inb(TLCLK_REG7) & 0x0f); |
| |
| if (0x0F == telclk_interrupt ) { /* not MCPBL0010 ? */ |
| printk(KERN_ERR "telclk_interrup = 0x%x non-mcpbl0010 hw.\n", |
| telclk_interrupt); |
| ret = -ENXIO; |
| goto out3; |
| } |
| |
| init_timer(&switchover_timer); |
| |
| ret = misc_register(&tlclk_miscdev); |
| if (ret < 0) { |
| printk(KERN_ERR "tlclk: misc_register returns %d.\n", ret); |
| goto out3; |
| } |
| |
| tlclk_device = platform_device_register_simple("telco_clock", |
| -1, NULL, 0); |
| if (IS_ERR(tlclk_device)) { |
| printk(KERN_ERR "tlclk: platform_device_register failed.\n"); |
| ret = PTR_ERR(tlclk_device); |
| goto out4; |
| } |
| |
| ret = sysfs_create_group(&tlclk_device->dev.kobj, |
| &tlclk_attribute_group); |
| if (ret) { |
| printk(KERN_ERR "tlclk: failed to create sysfs device attributes.\n"); |
| 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) |
| { |
| unsigned long flags = *(unsigned long *) data; |
| |
| if ((flags & 1)) { |
| if ((inb(TLCLK_REG1) & 0x08) != (flags & 0x08)) |
| alarm_events->switchover_primary++; |
| } else { |
| if ((inb(TLCLK_REG1) & 0x08) != (flags & 0x08)) |
| alarm_events->switchover_secondary++; |
| } |
| |
| /* Alarm processing is done, wake up read task */ |
| del_timer(&switchover_timer); |
| got_event = 1; |
| wake_up(&wq); |
| } |
| |
| static irqreturn_t tlclk_interrupt(int irq, void *dev_id) |
| { |
| 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); |
| tlclk_timer_data = inb(TLCLK_REG1); |
| switchover_timer.data = (unsigned long) &tlclk_timer_data; |
| mod_timer(&switchover_timer, switchover_timer.expires); |
| } else { |
| got_event = 1; |
| wake_up(&wq); |
| } |
| spin_unlock_irqrestore(&event_lock, flags); |
| |
| return IRQ_HANDLED; |
| } |
| |
| module_init(tlclk_init); |
| module_exit(tlclk_cleanup); |