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939 lines
23 KiB
939 lines
23 KiB
/* |
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* Telecom Clock driver for Intel NetStructure(tm) MPCBL0010 |
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* |
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* Copyright (C) 2005 Kontron Canada |
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* |
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* All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or (at |
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* your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
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* NON INFRINGEMENT. See the GNU General Public License for more |
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* 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 this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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* Send feedback to <[email protected]> and the current |
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* Maintainer <[email protected]> |
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* |
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* Description : This is the TELECOM CLOCK module driver for the ATCA |
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* MPCBL0010 ATCA computer. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> /* printk() */ |
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#include <linux/fs.h> /* everything... */ |
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#include <linux/errno.h> /* error codes */ |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <linux/ioport.h> |
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#include <linux/interrupt.h> |
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#include <linux/spinlock.h> |
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#include <linux/mutex.h> |
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#include <linux/timer.h> |
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#include <linux/sysfs.h> |
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#include <linux/device.h> |
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#include <linux/miscdevice.h> |
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#include <linux/platform_device.h> |
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#include <asm/io.h> /* inb/outb */ |
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#include <linux/uaccess.h> |
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|
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MODULE_AUTHOR("Sebastien Bouchard <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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|
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/*Hardware Reset of the PLL */ |
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#define RESET_ON 0x00 |
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#define RESET_OFF 0x01 |
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|
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/* MODE SELECT */ |
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#define NORMAL_MODE 0x00 |
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#define HOLDOVER_MODE 0x10 |
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#define FREERUN_MODE 0x20 |
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|
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/* FILTER SELECT */ |
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#define FILTER_6HZ 0x04 |
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#define FILTER_12HZ 0x00 |
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|
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/* SELECT REFERENCE FREQUENCY */ |
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#define REF_CLK1_8kHz 0x00 |
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#define REF_CLK2_19_44MHz 0x02 |
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|
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/* Select primary or secondary redundant clock */ |
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#define PRIMARY_CLOCK 0x00 |
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#define SECONDARY_CLOCK 0x01 |
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|
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/* CLOCK TRANSMISSION DEFINE */ |
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#define CLK_8kHz 0xff |
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#define CLK_16_384MHz 0xfb |
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|
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#define CLK_1_544MHz 0x00 |
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#define CLK_2_048MHz 0x01 |
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#define CLK_4_096MHz 0x02 |
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#define CLK_6_312MHz 0x03 |
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#define CLK_8_192MHz 0x04 |
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#define CLK_19_440MHz 0x06 |
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|
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#define CLK_8_592MHz 0x08 |
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#define CLK_11_184MHz 0x09 |
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#define CLK_34_368MHz 0x0b |
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#define CLK_44_736MHz 0x0a |
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|
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/* RECEIVED REFERENCE */ |
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#define AMC_B1 0 |
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#define AMC_B2 1 |
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|
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/* HARDWARE SWITCHING DEFINE */ |
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#define HW_ENABLE 0x80 |
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#define HW_DISABLE 0x00 |
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|
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/* HARDWARE SWITCHING MODE DEFINE */ |
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#define PLL_HOLDOVER 0x40 |
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#define LOST_CLOCK 0x00 |
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|
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/* ALARMS DEFINE */ |
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#define UNLOCK_MASK 0x10 |
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#define HOLDOVER_MASK 0x20 |
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#define SEC_LOST_MASK 0x40 |
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#define PRI_LOST_MASK 0x80 |
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|
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/* INTERRUPT CAUSE DEFINE */ |
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|
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#define PRI_LOS_01_MASK 0x01 |
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#define PRI_LOS_10_MASK 0x02 |
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|
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#define SEC_LOS_01_MASK 0x04 |
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#define SEC_LOS_10_MASK 0x08 |
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|
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#define HOLDOVER_01_MASK 0x10 |
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#define HOLDOVER_10_MASK 0x20 |
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|
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#define UNLOCK_01_MASK 0x40 |
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#define UNLOCK_10_MASK 0x80 |
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|
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struct tlclk_alarms { |
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__u32 lost_clocks; |
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__u32 lost_primary_clock; |
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__u32 lost_secondary_clock; |
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__u32 primary_clock_back; |
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__u32 secondary_clock_back; |
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__u32 switchover_primary; |
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__u32 switchover_secondary; |
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__u32 pll_holdover; |
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__u32 pll_end_holdover; |
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__u32 pll_lost_sync; |
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__u32 pll_sync; |
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}; |
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/* Telecom clock I/O register definition */ |
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#define TLCLK_BASE 0xa08 |
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#define TLCLK_REG0 TLCLK_BASE |
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#define TLCLK_REG1 (TLCLK_BASE+1) |
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#define TLCLK_REG2 (TLCLK_BASE+2) |
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#define TLCLK_REG3 (TLCLK_BASE+3) |
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#define TLCLK_REG4 (TLCLK_BASE+4) |
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#define TLCLK_REG5 (TLCLK_BASE+5) |
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#define TLCLK_REG6 (TLCLK_BASE+6) |
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#define TLCLK_REG7 (TLCLK_BASE+7) |
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|
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#define SET_PORT_BITS(port, mask, val) outb(((inb(port) & mask) | val), port) |
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|
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/* 0 = Dynamic allocation of the major device number */ |
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#define TLCLK_MAJOR 0 |
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|
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/* sysfs interface definition: |
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Upon loading the driver will create a sysfs directory under |
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/sys/devices/platform/telco_clock. |
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|
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This directory exports the following interfaces. There operation is |
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documented in the MCPBL0010 TPS under the Telecom Clock API section, 11.4. |
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alarms : |
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current_ref : |
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received_ref_clk3a : |
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received_ref_clk3b : |
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enable_clk3a_output : |
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enable_clk3b_output : |
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enable_clka0_output : |
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enable_clka1_output : |
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enable_clkb0_output : |
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enable_clkb1_output : |
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filter_select : |
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hardware_switching : |
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hardware_switching_mode : |
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telclock_version : |
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mode_select : |
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refalign : |
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reset : |
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select_amcb1_transmit_clock : |
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select_amcb2_transmit_clock : |
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select_redundant_clock : |
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select_ref_frequency : |
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All sysfs interfaces are integers in hex format, i.e echo 99 > refalign |
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has the same effect as echo 0x99 > refalign. |
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*/ |
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static unsigned int telclk_interrupt; |
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|
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static int int_events; /* Event that generate a interrupt */ |
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static int got_event; /* if events processing have been done */ |
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|
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static void switchover_timeout(struct timer_list *t); |
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static struct timer_list switchover_timer; |
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static unsigned long tlclk_timer_data; |
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static struct tlclk_alarms *alarm_events; |
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static DEFINE_SPINLOCK(event_lock); |
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static int tlclk_major = TLCLK_MAJOR; |
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static irqreturn_t tlclk_interrupt(int irq, void *dev_id); |
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|
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static DECLARE_WAIT_QUEUE_HEAD(wq); |
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|
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static unsigned long useflags; |
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static DEFINE_MUTEX(tlclk_mutex); |
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|
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static int tlclk_open(struct inode *inode, struct file *filp) |
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{ |
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int result; |
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|
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mutex_lock(&tlclk_mutex); |
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if (test_and_set_bit(0, &useflags)) { |
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result = -EBUSY; |
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/* this legacy device is always one per system and it doesn't |
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* know how to handle multiple concurrent clients. |
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*/ |
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goto out; |
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} |
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/* Make sure there is no interrupt pending while |
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* initialising interrupt handler */ |
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inb(TLCLK_REG6); |
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|
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/* This device is wired through the FPGA IO space of the ATCA blade |
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* we can't share this IRQ */ |
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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.\n"); |
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else |
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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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} |
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static int tlclk_release(struct inode *inode, struct file *filp) |
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{ |
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free_irq(telclk_interrupt, tlclk_interrupt); |
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clear_bit(0, &useflags); |
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return 0; |
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} |
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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) |
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{ |
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if (count < sizeof(struct tlclk_alarms)) |
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return -EIO; |
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if (mutex_lock_interruptible(&tlclk_mutex)) |
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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))) { |
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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)); |
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got_event = 0; |
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mutex_unlock(&tlclk_mutex); |
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return sizeof(struct tlclk_alarms); |
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} |
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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, |
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.release = tlclk_release, |
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.llseek = noop_llseek, |
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}; |
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static struct miscdevice tlclk_miscdev = { |
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.minor = MISC_DYNAMIC_MINOR, |
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.name = "telco_clock", |
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.fops = &tlclk_fops, |
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}; |
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static ssize_t show_current_ref(struct device *d, |
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struct device_attribute *attr, char *buf) |
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{ |
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unsigned long ret_val; |
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unsigned long flags; |
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spin_lock_irqsave(&event_lock, flags); |
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ret_val = ((inb(TLCLK_REG1) & 0x08) >> 3); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return sprintf(buf, "0x%lX\n", ret_val); |
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} |
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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) |
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{ |
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unsigned long ret_val; |
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unsigned long flags; |
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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); |
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return sprintf(buf, "0x%lX\n", ret_val); |
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} |
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static DEVICE_ATTR(telclock_version, S_IRUGO, |
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show_telclock_version, NULL); |
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static ssize_t show_alarms(struct device *d, |
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struct device_attribute *attr, char *buf) |
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{ |
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unsigned long ret_val; |
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unsigned long flags; |
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spin_lock_irqsave(&event_lock, flags); |
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ret_val = (inb(TLCLK_REG2) & 0xf0); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return sprintf(buf, "0x%lX\n", ret_val); |
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} |
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static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
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static ssize_t store_received_ref_clk3a(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long tmp; |
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unsigned char val; |
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unsigned long flags; |
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, ": tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG1, 0xef, val); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return strnlen(buf, count); |
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} |
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static DEVICE_ATTR(received_ref_clk3a, (S_IWUSR|S_IWGRP), NULL, |
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store_received_ref_clk3a); |
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static ssize_t store_received_ref_clk3b(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long tmp; |
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unsigned char val; |
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unsigned long flags; |
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, ": tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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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); |
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|
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return strnlen(buf, count); |
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} |
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|
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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, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long tmp; |
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unsigned char val; |
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unsigned long flags; |
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, ": tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG3, 0x7f, val << 7); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return strnlen(buf, count); |
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} |
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static DEVICE_ATTR(enable_clk3b_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clk3b_output); |
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|
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static ssize_t store_enable_clk3a_output(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG3, 0xbf, val << 6); |
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spin_unlock_irqrestore(&event_lock, flags); |
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|
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return strnlen(buf, count); |
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} |
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static DEVICE_ATTR(enable_clk3a_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clk3a_output); |
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|
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static ssize_t store_enable_clkb1_output(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG2, 0xf7, val << 3); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return strnlen(buf, count); |
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} |
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static DEVICE_ATTR(enable_clkb1_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clkb1_output); |
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static ssize_t store_enable_clka1_output(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG2, 0xfb, val << 2); |
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spin_unlock_irqrestore(&event_lock, flags); |
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return strnlen(buf, count); |
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} |
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static DEVICE_ATTR(enable_clka1_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clka1_output); |
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static ssize_t store_enable_clkb0_output(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG2, 0xfd, val << 1); |
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spin_unlock_irqrestore(&event_lock, flags); |
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|
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return strnlen(buf, count); |
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} |
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|
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static DEVICE_ATTR(enable_clkb0_output, (S_IWUSR|S_IWGRP), NULL, |
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store_enable_clkb0_output); |
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|
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static ssize_t store_enable_clka0_output(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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SET_PORT_BITS(TLCLK_REG2, 0xfe, val); |
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spin_unlock_irqrestore(&event_lock, flags); |
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|
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return strnlen(buf, count); |
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} |
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|
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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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|
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static ssize_t store_select_amcb2_transmit_clock(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long flags; |
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unsigned long tmp; |
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unsigned char val; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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|
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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if ((val == CLK_8kHz) || (val == CLK_16_384MHz)) { |
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SET_PORT_BITS(TLCLK_REG3, 0xc7, 0x28); |
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SET_PORT_BITS(TLCLK_REG1, 0xfb, ~val); |
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} else if (val >= CLK_8_592MHz) { |
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SET_PORT_BITS(TLCLK_REG3, 0xc7, 0x38); |
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switch (val) { |
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case CLK_8_592MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 2); |
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break; |
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case CLK_11_184MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 0); |
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break; |
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case CLK_34_368MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 3); |
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break; |
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case CLK_44_736MHz: |
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SET_PORT_BITS(TLCLK_REG0, 0xfc, 1); |
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break; |
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} |
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} else { |
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SET_PORT_BITS(TLCLK_REG3, 0xc7, val << 3); |
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} |
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spin_unlock_irqrestore(&event_lock, flags); |
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|
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return strnlen(buf, count); |
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} |
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|
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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); |
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|
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static ssize_t store_select_amcb1_transmit_clock(struct device *d, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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unsigned long tmp; |
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unsigned char val; |
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unsigned long flags; |
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|
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sscanf(buf, "%lX", &tmp); |
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dev_dbg(d, "tmp = 0x%lX\n", tmp); |
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|
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val = (unsigned char)tmp; |
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spin_lock_irqsave(&event_lock, flags); |
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if ((val == CLK_8kHz) || (val == CLK_16_384MHz)) { |
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SET_PORT_BITS(TLCLK_REG3, 0xf8, 0x5); |
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SET_PORT_BITS(TLCLK_REG1, 0xfb, ~val); |
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} else if (val >= CLK_8_592MHz) { |
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SET_PORT_BITS(TLCLK_REG3, 0xf8, 0x7); |
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switch (val) { |
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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: |
|
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 const 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; |
|
|
|
telclk_interrupt = (inb(TLCLK_REG7) & 0x0f); |
|
|
|
alarm_events = kzalloc( sizeof(struct tlclk_alarms), GFP_KERNEL); |
|
if (!alarm_events) { |
|
ret = -ENOMEM; |
|
goto out1; |
|
} |
|
|
|
ret = register_chrdev(tlclk_major, "telco_clock", &tlclk_fops); |
|
if (ret < 0) { |
|
printk(KERN_ERR "tlclk: can't get major %d.\n", tlclk_major); |
|
kfree(alarm_events); |
|
return ret; |
|
} |
|
tlclk_major = ret; |
|
|
|
/* 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; |
|
} |
|
|
|
if (0x0F == telclk_interrupt ) { /* not MCPBL0010 ? */ |
|
printk(KERN_ERR "telclk_interrupt = 0x%x non-mcpbl0010 hw.\n", |
|
telclk_interrupt); |
|
ret = -ENXIO; |
|
goto out3; |
|
} |
|
|
|
timer_setup(&switchover_timer, switchover_timeout, 0); |
|
|
|
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); |
|
unregister_chrdev(tlclk_major, "telco_clock"); |
|
out1: |
|
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(struct timer_list *unused) |
|
{ |
|
unsigned long flags = tlclk_timer_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); |
|
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);
|
|
|