From bca3a6d182b1deae02e5cbc05e727c75427e82ee Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 23 Feb 2015 14:58:03 -0700 Subject: [PATCH] staging: comedi: 8253.h: remove unused header All the comedi drivers have been converted to use the comedi_8254 module to provide support for the 8254 timers. Remove this unused header. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/8253.h | 347 -------------------------- 1 file changed, 347 deletions(-) delete mode 100644 drivers/staging/comedi/drivers/8253.h diff --git a/drivers/staging/comedi/drivers/8253.h b/drivers/staging/comedi/drivers/8253.h deleted file mode 100644 index 51b9c8d279c0..000000000000 --- a/drivers/staging/comedi/drivers/8253.h +++ /dev/null @@ -1,347 +0,0 @@ -/* - * comedi/drivers/8253.h - * Header file for 8253 - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 2000 David A. Schleef - * - * 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. See the - * GNU General Public License for more details. - */ - -#ifndef _8253_H -#define _8253_H - -#include "../comedi.h" - -/* - * Common oscillator base values in nanoseconds - */ -#define I8254_OSC_BASE_10MHZ 100 -#define I8254_OSC_BASE_5MHZ 200 -#define I8254_OSC_BASE_4MHZ 250 -#define I8254_OSC_BASE_2MHZ 500 -#define I8254_OSC_BASE_1MHZ 1000 - -static inline void i8253_cascade_ns_to_timer(int i8253_osc_base, - unsigned int *d1, - unsigned int *d2, - unsigned int *nanosec, - unsigned int flags) -{ - unsigned int divider; - unsigned int div1, div2; - unsigned int div1_glb, div2_glb, ns_glb; - unsigned int div1_lub, div2_lub, ns_lub; - unsigned int ns; - unsigned int start; - unsigned int ns_low, ns_high; - static const unsigned int max_count = 0x10000; - /* - * exit early if everything is already correct (this can save time - * since this function may be called repeatedly during command tests - * and execution) - */ - div1 = *d1 ? *d1 : max_count; - div2 = *d2 ? *d2 : max_count; - divider = div1 * div2; - if (div1 * div2 * i8253_osc_base == *nanosec && - div1 > 1 && div1 <= max_count && div2 > 1 && div2 <= max_count && - /* check for overflow */ - divider > div1 && divider > div2 && - divider * i8253_osc_base > divider && - divider * i8253_osc_base > i8253_osc_base) { - return; - } - - divider = *nanosec / i8253_osc_base; - - div1_lub = div2_lub = 0; - div1_glb = div2_glb = 0; - - ns_glb = 0; - ns_lub = 0xffffffff; - - div2 = max_count; - start = divider / div2; - if (start < 2) - start = 2; - for (div1 = start; div1 <= divider / div1 + 1 && div1 <= max_count; - div1++) { - for (div2 = divider / div1; - div1 * div2 <= divider + div1 + 1 && div2 <= max_count; - div2++) { - ns = i8253_osc_base * div1 * div2; - if (ns <= *nanosec && ns > ns_glb) { - ns_glb = ns; - div1_glb = div1; - div2_glb = div2; - } - if (ns >= *nanosec && ns < ns_lub) { - ns_lub = ns; - div1_lub = div1; - div2_lub = div2; - } - } - } - - switch (flags & CMDF_ROUND_MASK) { - case CMDF_ROUND_NEAREST: - default: - ns_high = div1_lub * div2_lub * i8253_osc_base; - ns_low = div1_glb * div2_glb * i8253_osc_base; - if (ns_high - *nanosec < *nanosec - ns_low) { - div1 = div1_lub; - div2 = div2_lub; - } else { - div1 = div1_glb; - div2 = div2_glb; - } - break; - case CMDF_ROUND_UP: - div1 = div1_lub; - div2 = div2_lub; - break; - case CMDF_ROUND_DOWN: - div1 = div1_glb; - div2 = div2_glb; - break; - } - - *nanosec = div1 * div2 * i8253_osc_base; - /* masking is done since counter maps zero to 0x10000 */ - *d1 = div1 & 0xffff; - *d2 = div2 & 0xffff; -} - -#ifndef CMDTEST -/* - * i8254_load programs 8254 counter chip. It should also work for the 8253. - * base_address is the lowest io address - * for the chip (the address of counter 0). - * counter_number is the counter you want to load (0,1 or 2) - * count is the number to load into the counter. - * - * You probably want to use mode 2. - * - * Use i8254_mm_load() if you board uses memory-mapped io, it is - * the same as i8254_load() except it uses writeb() instead of outb(). - * - * Neither i8254_load() or i8254_read() do their loading/reading - * atomically. The 16 bit read/writes are performed with two successive - * 8 bit read/writes. So if two parts of your driver do a load/read on - * the same counter, it may be necessary to protect these functions - * with a spinlock. - * - * FMH - */ - -#define i8254_control_reg 3 - -static inline int i8254_load(unsigned long base_address, unsigned int regshift, - unsigned int counter_number, unsigned int count, - unsigned int mode) -{ - unsigned int byte; - - if (counter_number > 2) - return -1; - if (count > 0xffff) - return -1; - if (mode > 5) - return -1; - if ((mode == 2 || mode == 3) && count == 1) - return -1; - - byte = counter_number << 6; - byte |= 0x30; /* load low then high byte */ - byte |= (mode << 1); /* set counter mode */ - outb(byte, base_address + (i8254_control_reg << regshift)); - byte = count & 0xff; /* lsb of counter value */ - outb(byte, base_address + (counter_number << regshift)); - byte = (count >> 8) & 0xff; /* msb of counter value */ - outb(byte, base_address + (counter_number << regshift)); - - return 0; -} - -static inline int i8254_mm_load(void __iomem *base_address, - unsigned int regshift, - unsigned int counter_number, - unsigned int count, - unsigned int mode) -{ - unsigned int byte; - - if (counter_number > 2) - return -1; - if (count > 0xffff) - return -1; - if (mode > 5) - return -1; - if ((mode == 2 || mode == 3) && count == 1) - return -1; - - byte = counter_number << 6; - byte |= 0x30; /* load low then high byte */ - byte |= (mode << 1); /* set counter mode */ - writeb(byte, base_address + (i8254_control_reg << regshift)); - byte = count & 0xff; /* lsb of counter value */ - writeb(byte, base_address + (counter_number << regshift)); - byte = (count >> 8) & 0xff; /* msb of counter value */ - writeb(byte, base_address + (counter_number << regshift)); - - return 0; -} - -/* Returns 16 bit counter value, should work for 8253 also. */ -static inline int i8254_read(unsigned long base_address, unsigned int regshift, - unsigned int counter_number) -{ - unsigned int byte; - int ret; - - if (counter_number > 2) - return -1; - - /* latch counter */ - byte = counter_number << 6; - outb(byte, base_address + (i8254_control_reg << regshift)); - - /* read lsb */ - ret = inb(base_address + (counter_number << regshift)); - /* read msb */ - ret += inb(base_address + (counter_number << regshift)) << 8; - - return ret; -} - -static inline int i8254_mm_read(void __iomem *base_address, - unsigned int regshift, - unsigned int counter_number) -{ - unsigned int byte; - int ret; - - if (counter_number > 2) - return -1; - - /* latch counter */ - byte = counter_number << 6; - writeb(byte, base_address + (i8254_control_reg << regshift)); - - /* read lsb */ - ret = readb(base_address + (counter_number << regshift)); - /* read msb */ - ret += readb(base_address + (counter_number << regshift)) << 8; - - return ret; -} - -/* Loads 16 bit initial counter value, should work for 8253 also. */ -static inline void i8254_write(unsigned long base_address, - unsigned int regshift, - unsigned int counter_number, unsigned int count) -{ - unsigned int byte; - - if (counter_number > 2) - return; - - byte = count & 0xff; /* lsb of counter value */ - outb(byte, base_address + (counter_number << regshift)); - byte = (count >> 8) & 0xff; /* msb of counter value */ - outb(byte, base_address + (counter_number << regshift)); -} - -static inline void i8254_mm_write(void __iomem *base_address, - unsigned int regshift, - unsigned int counter_number, - unsigned int count) -{ - unsigned int byte; - - if (counter_number > 2) - return; - - byte = count & 0xff; /* lsb of counter value */ - writeb(byte, base_address + (counter_number << regshift)); - byte = (count >> 8) & 0xff; /* msb of counter value */ - writeb(byte, base_address + (counter_number << regshift)); -} - -/* - * Set counter mode, should work for 8253 also. - * Note: the 'mode' value is different to that for i8254_load() and comes - * from the INSN_CONFIG_8254_SET_MODE command: - * I8254_MODE0, I8254_MODE1, ..., I8254_MODE5 - * OR'ed with: - * I8254_BCD, I8254_BINARY - */ -static inline int i8254_set_mode(unsigned long base_address, - unsigned int regshift, - unsigned int counter_number, unsigned int mode) -{ - unsigned int byte; - - if (counter_number > 2) - return -1; - if (mode > (I8254_MODE5 | I8254_BCD)) - return -1; - - byte = counter_number << 6; - byte |= 0x30; /* load low then high byte */ - byte |= mode; /* set counter mode and BCD|binary */ - outb(byte, base_address + (i8254_control_reg << regshift)); - - return 0; -} - -static inline int i8254_mm_set_mode(void __iomem *base_address, - unsigned int regshift, - unsigned int counter_number, - unsigned int mode) -{ - unsigned int byte; - - if (counter_number > 2) - return -1; - if (mode > (I8254_MODE5 | I8254_BCD)) - return -1; - - byte = counter_number << 6; - byte |= 0x30; /* load low then high byte */ - byte |= mode; /* set counter mode and BCD|binary */ - writeb(byte, base_address + (i8254_control_reg << regshift)); - - return 0; -} - -static inline int i8254_status(unsigned long base_address, - unsigned int regshift, - unsigned int counter_number) -{ - outb(0xE0 | (2 << counter_number), - base_address + (i8254_control_reg << regshift)); - return inb(base_address + (counter_number << regshift)); -} - -static inline int i8254_mm_status(void __iomem *base_address, - unsigned int regshift, - unsigned int counter_number) -{ - writeb(0xE0 | (2 << counter_number), - base_address + (i8254_control_reg << regshift)); - return readb(base_address + (counter_number << regshift)); -} - -#endif - -#endif -- 2.39.5