1f1d8a071SWilliam Breathitt Gray // SPDX-License-Identifier: GPL-2.0 2f1d8a071SWilliam Breathitt Gray /* 3f1d8a071SWilliam Breathitt Gray * Counter driver for the ACCES 104-QUAD-8 4f1d8a071SWilliam Breathitt Gray * Copyright (C) 2016 William Breathitt Gray 5f1d8a071SWilliam Breathitt Gray * 6f1d8a071SWilliam Breathitt Gray * This driver supports the ACCES 104-QUAD-8 and ACCES 104-QUAD-4. 7f1d8a071SWilliam Breathitt Gray */ 8f1d8a071SWilliam Breathitt Gray #include <linux/bitops.h> 9f1d8a071SWilliam Breathitt Gray #include <linux/counter.h> 10f1d8a071SWilliam Breathitt Gray #include <linux/device.h> 11f1d8a071SWilliam Breathitt Gray #include <linux/errno.h> 12f1d8a071SWilliam Breathitt Gray #include <linux/io.h> 13f1d8a071SWilliam Breathitt Gray #include <linux/ioport.h> 147aa2ba0dSWilliam Breathitt Gray #include <linux/interrupt.h> 15f1d8a071SWilliam Breathitt Gray #include <linux/isa.h> 16f1d8a071SWilliam Breathitt Gray #include <linux/kernel.h> 17c95cc0d9SWilliam Breathitt Gray #include <linux/list.h> 18f1d8a071SWilliam Breathitt Gray #include <linux/module.h> 19f1d8a071SWilliam Breathitt Gray #include <linux/moduleparam.h> 20f1d8a071SWilliam Breathitt Gray #include <linux/types.h> 2109db4678SWilliam Breathitt Gray #include <linux/spinlock.h> 22f1d8a071SWilliam Breathitt Gray 23f1d8a071SWilliam Breathitt Gray #define QUAD8_EXTENT 32 24f1d8a071SWilliam Breathitt Gray 25f1d8a071SWilliam Breathitt Gray static unsigned int base[max_num_isa_dev(QUAD8_EXTENT)]; 26f1d8a071SWilliam Breathitt Gray static unsigned int num_quad8; 27af383bb1SWilliam Breathitt Gray module_param_hw_array(base, uint, ioport, &num_quad8, 0); 28f1d8a071SWilliam Breathitt Gray MODULE_PARM_DESC(base, "ACCES 104-QUAD-8 base addresses"); 29f1d8a071SWilliam Breathitt Gray 307aa2ba0dSWilliam Breathitt Gray static unsigned int irq[max_num_isa_dev(QUAD8_EXTENT)]; 317aa2ba0dSWilliam Breathitt Gray module_param_hw_array(irq, uint, irq, NULL, 0); 327aa2ba0dSWilliam Breathitt Gray MODULE_PARM_DESC(irq, "ACCES 104-QUAD-8 interrupt line numbers"); 337aa2ba0dSWilliam Breathitt Gray 34f1d8a071SWilliam Breathitt Gray #define QUAD8_NUM_COUNTERS 8 35f1d8a071SWilliam Breathitt Gray 36f1d8a071SWilliam Breathitt Gray /** 37e357e81fSWilliam Breathitt Gray * struct quad8 - device private data structure 3894a853ecSWilliam Breathitt Gray * @lock: lock to prevent clobbering device states during R/W ops 39f1d8a071SWilliam Breathitt Gray * @counter: instance of the counter_device 40954ab5ccSWilliam Breathitt Gray * @fck_prescaler: array of filter clock prescaler configurations 41f1d8a071SWilliam Breathitt Gray * @preset: array of preset values 42f1d8a071SWilliam Breathitt Gray * @count_mode: array of count mode configurations 43f1d8a071SWilliam Breathitt Gray * @quadrature_mode: array of quadrature mode configurations 44f1d8a071SWilliam Breathitt Gray * @quadrature_scale: array of quadrature mode scale configurations 45f1d8a071SWilliam Breathitt Gray * @ab_enable: array of A and B inputs enable configurations 46f1d8a071SWilliam Breathitt Gray * @preset_enable: array of set_to_preset_on_index attribute configurations 477aa2ba0dSWilliam Breathitt Gray * @irq_trigger: array of current IRQ trigger function configurations 48f1d8a071SWilliam Breathitt Gray * @synchronous_mode: array of index function synchronous mode configurations 49f1d8a071SWilliam Breathitt Gray * @index_polarity: array of index function polarity configurations 50954ab5ccSWilliam Breathitt Gray * @cable_fault_enable: differential encoder cable status enable configurations 51e357e81fSWilliam Breathitt Gray * @base: base port address of the device 52f1d8a071SWilliam Breathitt Gray */ 53e357e81fSWilliam Breathitt Gray struct quad8 { 5409db4678SWilliam Breathitt Gray spinlock_t lock; 55de65d055SWilliam Breathitt Gray unsigned int fck_prescaler[QUAD8_NUM_COUNTERS]; 56f1d8a071SWilliam Breathitt Gray unsigned int preset[QUAD8_NUM_COUNTERS]; 57f1d8a071SWilliam Breathitt Gray unsigned int count_mode[QUAD8_NUM_COUNTERS]; 58f1d8a071SWilliam Breathitt Gray unsigned int quadrature_mode[QUAD8_NUM_COUNTERS]; 59f1d8a071SWilliam Breathitt Gray unsigned int quadrature_scale[QUAD8_NUM_COUNTERS]; 60f1d8a071SWilliam Breathitt Gray unsigned int ab_enable[QUAD8_NUM_COUNTERS]; 61f1d8a071SWilliam Breathitt Gray unsigned int preset_enable[QUAD8_NUM_COUNTERS]; 627aa2ba0dSWilliam Breathitt Gray unsigned int irq_trigger[QUAD8_NUM_COUNTERS]; 63f1d8a071SWilliam Breathitt Gray unsigned int synchronous_mode[QUAD8_NUM_COUNTERS]; 64f1d8a071SWilliam Breathitt Gray unsigned int index_polarity[QUAD8_NUM_COUNTERS]; 65954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 66f1d8a071SWilliam Breathitt Gray unsigned int base; 67f1d8a071SWilliam Breathitt Gray }; 68f1d8a071SWilliam Breathitt Gray 697aa2ba0dSWilliam Breathitt Gray #define QUAD8_REG_INTERRUPT_STATUS 0x10 70f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_CHAN_OP 0x11 717aa2ba0dSWilliam Breathitt Gray #define QUAD8_REG_INDEX_INTERRUPT 0x12 72f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_INDEX_INPUT_LEVELS 0x16 73954ab5ccSWilliam Breathitt Gray #define QUAD8_DIFF_ENCODER_CABLE_STATUS 0x17 74f1d8a071SWilliam Breathitt Gray /* Borrow Toggle flip-flop */ 75f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_BT BIT(0) 76f1d8a071SWilliam Breathitt Gray /* Carry Toggle flip-flop */ 77f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_CT BIT(1) 78f1d8a071SWilliam Breathitt Gray /* Error flag */ 79f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_E BIT(4) 80f1d8a071SWilliam Breathitt Gray /* Up/Down flag */ 81f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_UD BIT(5) 82f1d8a071SWilliam Breathitt Gray /* Reset and Load Signal Decoders */ 83f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_RLD 0x00 84f1d8a071SWilliam Breathitt Gray /* Counter Mode Register */ 85f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_CMR 0x20 86f1d8a071SWilliam Breathitt Gray /* Input / Output Control Register */ 87f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IOR 0x40 88f1d8a071SWilliam Breathitt Gray /* Index Control Register */ 89f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IDR 0x60 90f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer (three byte data pointer) */ 91f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_BP 0x01 92f1d8a071SWilliam Breathitt Gray /* Reset Counter */ 93f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_CNTR 0x02 94f1d8a071SWilliam Breathitt Gray /* Reset Borrow Toggle, Carry Toggle, Compare Toggle, and Sign flags */ 95f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_FLAGS 0x04 96f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 97f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_E 0x06 98f1d8a071SWilliam Breathitt Gray /* Preset Register to Counter */ 99f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_CNTR 0x08 100f1d8a071SWilliam Breathitt Gray /* Transfer Counter to Output Latch */ 101f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_CNTR_OUT 0x10 102de65d055SWilliam Breathitt Gray /* Transfer Preset Register LSB to FCK Prescaler */ 103de65d055SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_PSC 0x18 104f1d8a071SWilliam Breathitt Gray #define QUAD8_CHAN_OP_RESET_COUNTERS 0x01 1057aa2ba0dSWilliam Breathitt Gray #define QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC 0x04 106f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X1 0x08 107f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X2 0x10 108f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X4 0x18 109f1d8a071SWilliam Breathitt Gray 110f1d8a071SWilliam Breathitt Gray static int quad8_signal_read(struct counter_device *counter, 111493b938aSWilliam Breathitt Gray struct counter_signal *signal, 112493b938aSWilliam Breathitt Gray enum counter_signal_level *level) 113f1d8a071SWilliam Breathitt Gray { 114aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 115f1d8a071SWilliam Breathitt Gray unsigned int state; 116f1d8a071SWilliam Breathitt Gray 117f1d8a071SWilliam Breathitt Gray /* Only Index signal levels can be read */ 118f1d8a071SWilliam Breathitt Gray if (signal->id < 16) 119f1d8a071SWilliam Breathitt Gray return -EINVAL; 120f1d8a071SWilliam Breathitt Gray 121f1d8a071SWilliam Breathitt Gray state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS) 122f1d8a071SWilliam Breathitt Gray & BIT(signal->id - 16); 123f1d8a071SWilliam Breathitt Gray 124493b938aSWilliam Breathitt Gray *level = (state) ? COUNTER_SIGNAL_LEVEL_HIGH : COUNTER_SIGNAL_LEVEL_LOW; 125f1d8a071SWilliam Breathitt Gray 126f1d8a071SWilliam Breathitt Gray return 0; 127f1d8a071SWilliam Breathitt Gray } 128f1d8a071SWilliam Breathitt Gray 129f1d8a071SWilliam Breathitt Gray static int quad8_count_read(struct counter_device *counter, 130aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *val) 131f1d8a071SWilliam Breathitt Gray { 132aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 133f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 134f1d8a071SWilliam Breathitt Gray unsigned int flags; 135f1d8a071SWilliam Breathitt Gray unsigned int borrow; 136f1d8a071SWilliam Breathitt Gray unsigned int carry; 13709db4678SWilliam Breathitt Gray unsigned long irqflags; 138f1d8a071SWilliam Breathitt Gray int i; 139f1d8a071SWilliam Breathitt Gray 140f1d8a071SWilliam Breathitt Gray flags = inb(base_offset + 1); 141f1d8a071SWilliam Breathitt Gray borrow = flags & QUAD8_FLAG_BT; 142f1d8a071SWilliam Breathitt Gray carry = !!(flags & QUAD8_FLAG_CT); 143f1d8a071SWilliam Breathitt Gray 144f1d8a071SWilliam Breathitt Gray /* Borrow XOR Carry effectively doubles count range */ 145d49e6ee2SWilliam Breathitt Gray *val = (unsigned long)(borrow ^ carry) << 24; 146f1d8a071SWilliam Breathitt Gray 14709db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 148fc069262SSyed Nayyar Waris 149f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer; transfer Counter to Output Latch */ 150f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT, 151f1d8a071SWilliam Breathitt Gray base_offset + 1); 152f1d8a071SWilliam Breathitt Gray 153f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 154d49e6ee2SWilliam Breathitt Gray *val |= (unsigned long)inb(base_offset) << (8 * i); 155f1d8a071SWilliam Breathitt Gray 15609db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 157fc069262SSyed Nayyar Waris 158f1d8a071SWilliam Breathitt Gray return 0; 159f1d8a071SWilliam Breathitt Gray } 160f1d8a071SWilliam Breathitt Gray 161f1d8a071SWilliam Breathitt Gray static int quad8_count_write(struct counter_device *counter, 162aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 val) 163f1d8a071SWilliam Breathitt Gray { 164aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 165f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 16609db4678SWilliam Breathitt Gray unsigned long irqflags; 167f1d8a071SWilliam Breathitt Gray int i; 168f1d8a071SWilliam Breathitt Gray 169f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 170d49e6ee2SWilliam Breathitt Gray if (val > 0xFFFFFF) 171e2ff3198SWilliam Breathitt Gray return -ERANGE; 172f1d8a071SWilliam Breathitt Gray 17309db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 174fc069262SSyed Nayyar Waris 175f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 176f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 177f1d8a071SWilliam Breathitt Gray 178f1d8a071SWilliam Breathitt Gray /* Counter can only be set via Preset Register */ 179f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 180d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 181f1d8a071SWilliam Breathitt Gray 182f1d8a071SWilliam Breathitt Gray /* Transfer Preset Register to Counter */ 183f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1); 184f1d8a071SWilliam Breathitt Gray 185f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 186f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 187f1d8a071SWilliam Breathitt Gray 188f1d8a071SWilliam Breathitt Gray /* Set Preset Register back to original value */ 189d49e6ee2SWilliam Breathitt Gray val = priv->preset[count->id]; 190f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 191d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 192f1d8a071SWilliam Breathitt Gray 193f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 194f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 195f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 196f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 197f1d8a071SWilliam Breathitt Gray 19809db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 199fc069262SSyed Nayyar Waris 200f1d8a071SWilliam Breathitt Gray return 0; 201f1d8a071SWilliam Breathitt Gray } 202f1d8a071SWilliam Breathitt Gray 203394a0150SWilliam Breathitt Gray static const enum counter_function quad8_count_functions_list[] = { 204aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_PULSE_DIRECTION, 205aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X1_A, 206aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X2_A, 207aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X4, 208f1d8a071SWilliam Breathitt Gray }; 209f1d8a071SWilliam Breathitt Gray 210aaec1a0fSWilliam Breathitt Gray static int quad8_function_read(struct counter_device *counter, 211aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 212aaec1a0fSWilliam Breathitt Gray enum counter_function *function) 213f1d8a071SWilliam Breathitt Gray { 214aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 215f1d8a071SWilliam Breathitt Gray const int id = count->id; 21609db4678SWilliam Breathitt Gray unsigned long irqflags; 217f1d8a071SWilliam Breathitt Gray 21809db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 219fc069262SSyed Nayyar Waris 220fc069262SSyed Nayyar Waris if (priv->quadrature_mode[id]) 221fc069262SSyed Nayyar Waris switch (priv->quadrature_scale[id]) { 222f1d8a071SWilliam Breathitt Gray case 0: 223aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X1_A; 224f1d8a071SWilliam Breathitt Gray break; 225f1d8a071SWilliam Breathitt Gray case 1: 226aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X2_A; 227f1d8a071SWilliam Breathitt Gray break; 228f1d8a071SWilliam Breathitt Gray case 2: 229aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X4; 230f1d8a071SWilliam Breathitt Gray break; 231f1d8a071SWilliam Breathitt Gray } 232f1d8a071SWilliam Breathitt Gray else 233aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_PULSE_DIRECTION; 234f1d8a071SWilliam Breathitt Gray 23509db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 236fc069262SSyed Nayyar Waris 237f1d8a071SWilliam Breathitt Gray return 0; 238f1d8a071SWilliam Breathitt Gray } 239f1d8a071SWilliam Breathitt Gray 240aaec1a0fSWilliam Breathitt Gray static int quad8_function_write(struct counter_device *counter, 241aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 242aaec1a0fSWilliam Breathitt Gray enum counter_function function) 243f1d8a071SWilliam Breathitt Gray { 244aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 245f1d8a071SWilliam Breathitt Gray const int id = count->id; 246f1d8a071SWilliam Breathitt Gray unsigned int *const quadrature_mode = priv->quadrature_mode + id; 247f1d8a071SWilliam Breathitt Gray unsigned int *const scale = priv->quadrature_scale + id; 248f1d8a071SWilliam Breathitt Gray unsigned int *const synchronous_mode = priv->synchronous_mode + id; 249f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * id + 1; 25009db4678SWilliam Breathitt Gray unsigned long irqflags; 251fc069262SSyed Nayyar Waris unsigned int mode_cfg; 252fc069262SSyed Nayyar Waris unsigned int idr_cfg; 253fc069262SSyed Nayyar Waris 25409db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 255fc069262SSyed Nayyar Waris 256fc069262SSyed Nayyar Waris mode_cfg = priv->count_mode[id] << 1; 257fc069262SSyed Nayyar Waris idr_cfg = priv->index_polarity[id] << 1; 258f1d8a071SWilliam Breathitt Gray 259aaec1a0fSWilliam Breathitt Gray if (function == COUNTER_FUNCTION_PULSE_DIRECTION) { 260f1d8a071SWilliam Breathitt Gray *quadrature_mode = 0; 261f1d8a071SWilliam Breathitt Gray 262f1d8a071SWilliam Breathitt Gray /* Quadrature scaling only available in quadrature mode */ 263f1d8a071SWilliam Breathitt Gray *scale = 0; 264f1d8a071SWilliam Breathitt Gray 265f1d8a071SWilliam Breathitt Gray /* Synchronous function not supported in non-quadrature mode */ 266f1d8a071SWilliam Breathitt Gray if (*synchronous_mode) { 267f1d8a071SWilliam Breathitt Gray *synchronous_mode = 0; 268f1d8a071SWilliam Breathitt Gray /* Disable synchronous function mode */ 269f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 270f1d8a071SWilliam Breathitt Gray } 271f1d8a071SWilliam Breathitt Gray } else { 272f1d8a071SWilliam Breathitt Gray *quadrature_mode = 1; 273f1d8a071SWilliam Breathitt Gray 274f1d8a071SWilliam Breathitt Gray switch (function) { 275aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X1_A: 276f1d8a071SWilliam Breathitt Gray *scale = 0; 277f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X1; 278f1d8a071SWilliam Breathitt Gray break; 279aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X2_A: 280f1d8a071SWilliam Breathitt Gray *scale = 1; 281f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X2; 282f1d8a071SWilliam Breathitt Gray break; 283aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X4: 284f1d8a071SWilliam Breathitt Gray *scale = 2; 285f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X4; 286f1d8a071SWilliam Breathitt Gray break; 287b11eed15SWilliam Breathitt Gray default: 288b11eed15SWilliam Breathitt Gray /* should never reach this path */ 28909db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 290b11eed15SWilliam Breathitt Gray return -EINVAL; 291f1d8a071SWilliam Breathitt Gray } 292f1d8a071SWilliam Breathitt Gray } 293f1d8a071SWilliam Breathitt Gray 294f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 295f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 296f1d8a071SWilliam Breathitt Gray 29709db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 298fc069262SSyed Nayyar Waris 299f1d8a071SWilliam Breathitt Gray return 0; 300f1d8a071SWilliam Breathitt Gray } 301f1d8a071SWilliam Breathitt Gray 302aaec1a0fSWilliam Breathitt Gray static int quad8_direction_read(struct counter_device *counter, 303aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 304aaec1a0fSWilliam Breathitt Gray enum counter_count_direction *direction) 305f1d8a071SWilliam Breathitt Gray { 306aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 307f1d8a071SWilliam Breathitt Gray unsigned int ud_flag; 308f1d8a071SWilliam Breathitt Gray const unsigned int flag_addr = priv->base + 2 * count->id + 1; 309f1d8a071SWilliam Breathitt Gray 310f1d8a071SWilliam Breathitt Gray /* U/D flag: nonzero = up, zero = down */ 311f1d8a071SWilliam Breathitt Gray ud_flag = inb(flag_addr) & QUAD8_FLAG_UD; 312f1d8a071SWilliam Breathitt Gray 313f1d8a071SWilliam Breathitt Gray *direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD : 314f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_DIRECTION_BACKWARD; 315aaec1a0fSWilliam Breathitt Gray 316aaec1a0fSWilliam Breathitt Gray return 0; 317f1d8a071SWilliam Breathitt Gray } 318f1d8a071SWilliam Breathitt Gray 3196a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_index_actions_list[] = { 320aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_NONE, 321aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_RISING_EDGE, 322f1d8a071SWilliam Breathitt Gray }; 323f1d8a071SWilliam Breathitt Gray 3246a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_synapse_actions_list[] = { 325aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_NONE, 326aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_RISING_EDGE, 327aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 328aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_BOTH_EDGES, 329f1d8a071SWilliam Breathitt Gray }; 330f1d8a071SWilliam Breathitt Gray 331aaec1a0fSWilliam Breathitt Gray static int quad8_action_read(struct counter_device *counter, 332aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 333aaec1a0fSWilliam Breathitt Gray struct counter_synapse *synapse, 334aaec1a0fSWilliam Breathitt Gray enum counter_synapse_action *action) 335f1d8a071SWilliam Breathitt Gray { 336aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 337f1d8a071SWilliam Breathitt Gray int err; 338aaec1a0fSWilliam Breathitt Gray enum counter_function function; 339f1d8a071SWilliam Breathitt Gray const size_t signal_a_id = count->synapses[0].signal->id; 340f1d8a071SWilliam Breathitt Gray enum counter_count_direction direction; 341f1d8a071SWilliam Breathitt Gray 342f1d8a071SWilliam Breathitt Gray /* Handle Index signals */ 343f1d8a071SWilliam Breathitt Gray if (synapse->signal->id >= 16) { 344f1d8a071SWilliam Breathitt Gray if (priv->preset_enable[count->id]) 345aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 346f1d8a071SWilliam Breathitt Gray else 347aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_NONE; 348f1d8a071SWilliam Breathitt Gray 349f1d8a071SWilliam Breathitt Gray return 0; 350f1d8a071SWilliam Breathitt Gray } 351f1d8a071SWilliam Breathitt Gray 352aaec1a0fSWilliam Breathitt Gray err = quad8_function_read(counter, count, &function); 353f1d8a071SWilliam Breathitt Gray if (err) 354f1d8a071SWilliam Breathitt Gray return err; 355f1d8a071SWilliam Breathitt Gray 356f1d8a071SWilliam Breathitt Gray /* Default action mode */ 357aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_NONE; 358f1d8a071SWilliam Breathitt Gray 359f1d8a071SWilliam Breathitt Gray /* Determine action mode based on current count function mode */ 360f1d8a071SWilliam Breathitt Gray switch (function) { 361aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_PULSE_DIRECTION: 362f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 363aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 364b11eed15SWilliam Breathitt Gray return 0; 365aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X1_A: 366f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) { 367aaec1a0fSWilliam Breathitt Gray err = quad8_direction_read(counter, count, &direction); 368aaec1a0fSWilliam Breathitt Gray if (err) 369aaec1a0fSWilliam Breathitt Gray return err; 370f1d8a071SWilliam Breathitt Gray 371f1d8a071SWilliam Breathitt Gray if (direction == COUNTER_COUNT_DIRECTION_FORWARD) 372aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 373f1d8a071SWilliam Breathitt Gray else 374aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE; 375f1d8a071SWilliam Breathitt Gray } 376b11eed15SWilliam Breathitt Gray return 0; 377aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X2_A: 378f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 379aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; 380b11eed15SWilliam Breathitt Gray return 0; 381aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X4: 382aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; 383f1d8a071SWilliam Breathitt Gray return 0; 384b11eed15SWilliam Breathitt Gray default: 385b11eed15SWilliam Breathitt Gray /* should never reach this path */ 386b11eed15SWilliam Breathitt Gray return -EINVAL; 387b11eed15SWilliam Breathitt Gray } 388f1d8a071SWilliam Breathitt Gray } 389f1d8a071SWilliam Breathitt Gray 3907aa2ba0dSWilliam Breathitt Gray enum { 3917aa2ba0dSWilliam Breathitt Gray QUAD8_EVENT_CARRY = 0, 3927aa2ba0dSWilliam Breathitt Gray QUAD8_EVENT_COMPARE = 1, 3937aa2ba0dSWilliam Breathitt Gray QUAD8_EVENT_CARRY_BORROW = 2, 3947aa2ba0dSWilliam Breathitt Gray QUAD8_EVENT_INDEX = 3, 3957aa2ba0dSWilliam Breathitt Gray }; 3967aa2ba0dSWilliam Breathitt Gray 3977aa2ba0dSWilliam Breathitt Gray static int quad8_events_configure(struct counter_device *counter) 3987aa2ba0dSWilliam Breathitt Gray { 399aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 4007aa2ba0dSWilliam Breathitt Gray unsigned long irq_enabled = 0; 4017aa2ba0dSWilliam Breathitt Gray unsigned long irqflags; 402c95cc0d9SWilliam Breathitt Gray struct counter_event_node *event_node; 403c95cc0d9SWilliam Breathitt Gray unsigned int next_irq_trigger; 4047aa2ba0dSWilliam Breathitt Gray unsigned long ior_cfg; 4057aa2ba0dSWilliam Breathitt Gray unsigned long base_offset; 4067aa2ba0dSWilliam Breathitt Gray 4077aa2ba0dSWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 4087aa2ba0dSWilliam Breathitt Gray 409c95cc0d9SWilliam Breathitt Gray list_for_each_entry(event_node, &counter->events_list, l) { 410c95cc0d9SWilliam Breathitt Gray switch (event_node->event) { 411c95cc0d9SWilliam Breathitt Gray case COUNTER_EVENT_OVERFLOW: 412c95cc0d9SWilliam Breathitt Gray next_irq_trigger = QUAD8_EVENT_CARRY; 413c95cc0d9SWilliam Breathitt Gray break; 414c95cc0d9SWilliam Breathitt Gray case COUNTER_EVENT_THRESHOLD: 415c95cc0d9SWilliam Breathitt Gray next_irq_trigger = QUAD8_EVENT_COMPARE; 416c95cc0d9SWilliam Breathitt Gray break; 417c95cc0d9SWilliam Breathitt Gray case COUNTER_EVENT_OVERFLOW_UNDERFLOW: 418c95cc0d9SWilliam Breathitt Gray next_irq_trigger = QUAD8_EVENT_CARRY_BORROW; 419c95cc0d9SWilliam Breathitt Gray break; 420c95cc0d9SWilliam Breathitt Gray case COUNTER_EVENT_INDEX: 421c95cc0d9SWilliam Breathitt Gray next_irq_trigger = QUAD8_EVENT_INDEX; 422c95cc0d9SWilliam Breathitt Gray break; 423c95cc0d9SWilliam Breathitt Gray default: 424c95cc0d9SWilliam Breathitt Gray /* should never reach this path */ 425c95cc0d9SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 426c95cc0d9SWilliam Breathitt Gray return -EINVAL; 4277aa2ba0dSWilliam Breathitt Gray } 4287aa2ba0dSWilliam Breathitt Gray 429c95cc0d9SWilliam Breathitt Gray /* Skip configuration if it is the same as previously set */ 430c95cc0d9SWilliam Breathitt Gray if (priv->irq_trigger[event_node->channel] == next_irq_trigger) 431c95cc0d9SWilliam Breathitt Gray continue; 432c95cc0d9SWilliam Breathitt Gray 433c95cc0d9SWilliam Breathitt Gray /* Save new IRQ function configuration */ 434c95cc0d9SWilliam Breathitt Gray priv->irq_trigger[event_node->channel] = next_irq_trigger; 435c95cc0d9SWilliam Breathitt Gray 436c95cc0d9SWilliam Breathitt Gray /* Load configuration to I/O Control Register */ 437c95cc0d9SWilliam Breathitt Gray ior_cfg = priv->ab_enable[event_node->channel] | 438c95cc0d9SWilliam Breathitt Gray priv->preset_enable[event_node->channel] << 1 | 439c95cc0d9SWilliam Breathitt Gray priv->irq_trigger[event_node->channel] << 3; 440c95cc0d9SWilliam Breathitt Gray base_offset = priv->base + 2 * event_node->channel + 1; 441c95cc0d9SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 4427aa2ba0dSWilliam Breathitt Gray 4437aa2ba0dSWilliam Breathitt Gray /* Enable IRQ line */ 444c95cc0d9SWilliam Breathitt Gray irq_enabled |= BIT(event_node->channel); 4457aa2ba0dSWilliam Breathitt Gray } 4467aa2ba0dSWilliam Breathitt Gray 4477aa2ba0dSWilliam Breathitt Gray outb(irq_enabled, priv->base + QUAD8_REG_INDEX_INTERRUPT); 4487aa2ba0dSWilliam Breathitt Gray 4497aa2ba0dSWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 4507aa2ba0dSWilliam Breathitt Gray 4517aa2ba0dSWilliam Breathitt Gray return 0; 4527aa2ba0dSWilliam Breathitt Gray } 4537aa2ba0dSWilliam Breathitt Gray 4547aa2ba0dSWilliam Breathitt Gray static int quad8_watch_validate(struct counter_device *counter, 4557aa2ba0dSWilliam Breathitt Gray const struct counter_watch *watch) 4567aa2ba0dSWilliam Breathitt Gray { 457c95cc0d9SWilliam Breathitt Gray struct counter_event_node *event_node; 4587aa2ba0dSWilliam Breathitt Gray 4597aa2ba0dSWilliam Breathitt Gray if (watch->channel > QUAD8_NUM_COUNTERS - 1) 4607aa2ba0dSWilliam Breathitt Gray return -EINVAL; 4617aa2ba0dSWilliam Breathitt Gray 4627aa2ba0dSWilliam Breathitt Gray switch (watch->event) { 4637aa2ba0dSWilliam Breathitt Gray case COUNTER_EVENT_OVERFLOW: 4647aa2ba0dSWilliam Breathitt Gray case COUNTER_EVENT_THRESHOLD: 4657aa2ba0dSWilliam Breathitt Gray case COUNTER_EVENT_OVERFLOW_UNDERFLOW: 4667aa2ba0dSWilliam Breathitt Gray case COUNTER_EVENT_INDEX: 467c95cc0d9SWilliam Breathitt Gray list_for_each_entry(event_node, &counter->next_events_list, l) 468c95cc0d9SWilliam Breathitt Gray if (watch->channel == event_node->channel && 469c95cc0d9SWilliam Breathitt Gray watch->event != event_node->event) 4707aa2ba0dSWilliam Breathitt Gray return -EINVAL; 4717aa2ba0dSWilliam Breathitt Gray return 0; 4727aa2ba0dSWilliam Breathitt Gray default: 4737aa2ba0dSWilliam Breathitt Gray return -EINVAL; 4747aa2ba0dSWilliam Breathitt Gray } 4757aa2ba0dSWilliam Breathitt Gray } 4767aa2ba0dSWilliam Breathitt Gray 47717aa207eSYueHaibing static const struct counter_ops quad8_ops = { 478f1d8a071SWilliam Breathitt Gray .signal_read = quad8_signal_read, 479f1d8a071SWilliam Breathitt Gray .count_read = quad8_count_read, 480f1d8a071SWilliam Breathitt Gray .count_write = quad8_count_write, 481aaec1a0fSWilliam Breathitt Gray .function_read = quad8_function_read, 482aaec1a0fSWilliam Breathitt Gray .function_write = quad8_function_write, 4837aa2ba0dSWilliam Breathitt Gray .action_read = quad8_action_read, 4847aa2ba0dSWilliam Breathitt Gray .events_configure = quad8_events_configure, 4857aa2ba0dSWilliam Breathitt Gray .watch_validate = quad8_watch_validate, 486f1d8a071SWilliam Breathitt Gray }; 487f1d8a071SWilliam Breathitt Gray 488e357e81fSWilliam Breathitt Gray static const char *const quad8_index_polarity_modes[] = { 489e357e81fSWilliam Breathitt Gray "negative", 490e357e81fSWilliam Breathitt Gray "positive" 491e357e81fSWilliam Breathitt Gray }; 492e357e81fSWilliam Breathitt Gray 493f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_get(struct counter_device *counter, 494aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 495aaec1a0fSWilliam Breathitt Gray u32 *index_polarity) 496f1d8a071SWilliam Breathitt Gray { 497aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 498f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 499f1d8a071SWilliam Breathitt Gray 500f1d8a071SWilliam Breathitt Gray *index_polarity = priv->index_polarity[channel_id]; 501f1d8a071SWilliam Breathitt Gray 502f1d8a071SWilliam Breathitt Gray return 0; 503f1d8a071SWilliam Breathitt Gray } 504f1d8a071SWilliam Breathitt Gray 505f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_set(struct counter_device *counter, 506aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 507aaec1a0fSWilliam Breathitt Gray u32 index_polarity) 508f1d8a071SWilliam Breathitt Gray { 509aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 510f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 511f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 51209db4678SWilliam Breathitt Gray unsigned long irqflags; 513fc069262SSyed Nayyar Waris unsigned int idr_cfg = index_polarity << 1; 514fc069262SSyed Nayyar Waris 51509db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 516fc069262SSyed Nayyar Waris 517fc069262SSyed Nayyar Waris idr_cfg |= priv->synchronous_mode[channel_id]; 518f1d8a071SWilliam Breathitt Gray 519f1d8a071SWilliam Breathitt Gray priv->index_polarity[channel_id] = index_polarity; 520f1d8a071SWilliam Breathitt Gray 521f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 522f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 523f1d8a071SWilliam Breathitt Gray 52409db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 525fc069262SSyed Nayyar Waris 526f1d8a071SWilliam Breathitt Gray return 0; 527f1d8a071SWilliam Breathitt Gray } 528f1d8a071SWilliam Breathitt Gray 529e357e81fSWilliam Breathitt Gray static const char *const quad8_synchronous_modes[] = { 530e357e81fSWilliam Breathitt Gray "non-synchronous", 531e357e81fSWilliam Breathitt Gray "synchronous" 532e357e81fSWilliam Breathitt Gray }; 533e357e81fSWilliam Breathitt Gray 534f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_get(struct counter_device *counter, 535aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 536aaec1a0fSWilliam Breathitt Gray u32 *synchronous_mode) 537f1d8a071SWilliam Breathitt Gray { 538aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 539f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 540f1d8a071SWilliam Breathitt Gray 541f1d8a071SWilliam Breathitt Gray *synchronous_mode = priv->synchronous_mode[channel_id]; 542f1d8a071SWilliam Breathitt Gray 543f1d8a071SWilliam Breathitt Gray return 0; 544f1d8a071SWilliam Breathitt Gray } 545f1d8a071SWilliam Breathitt Gray 546f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_set(struct counter_device *counter, 547aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 548aaec1a0fSWilliam Breathitt Gray u32 synchronous_mode) 549f1d8a071SWilliam Breathitt Gray { 550aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 551f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 552f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 55309db4678SWilliam Breathitt Gray unsigned long irqflags; 554fc069262SSyed Nayyar Waris unsigned int idr_cfg = synchronous_mode; 555fc069262SSyed Nayyar Waris 55609db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 557fc069262SSyed Nayyar Waris 558fc069262SSyed Nayyar Waris idr_cfg |= priv->index_polarity[channel_id] << 1; 559f1d8a071SWilliam Breathitt Gray 560f1d8a071SWilliam Breathitt Gray /* Index function must be non-synchronous in non-quadrature mode */ 561fc069262SSyed Nayyar Waris if (synchronous_mode && !priv->quadrature_mode[channel_id]) { 56209db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 563f1d8a071SWilliam Breathitt Gray return -EINVAL; 564fc069262SSyed Nayyar Waris } 565f1d8a071SWilliam Breathitt Gray 566f1d8a071SWilliam Breathitt Gray priv->synchronous_mode[channel_id] = synchronous_mode; 567f1d8a071SWilliam Breathitt Gray 568f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 569f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 570f1d8a071SWilliam Breathitt Gray 57109db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 572fc069262SSyed Nayyar Waris 573f1d8a071SWilliam Breathitt Gray return 0; 574f1d8a071SWilliam Breathitt Gray } 575f1d8a071SWilliam Breathitt Gray 576aaec1a0fSWilliam Breathitt Gray static int quad8_count_floor_read(struct counter_device *counter, 577aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *floor) 578f1d8a071SWilliam Breathitt Gray { 579f1d8a071SWilliam Breathitt Gray /* Only a floor of 0 is supported */ 580aaec1a0fSWilliam Breathitt Gray *floor = 0; 581aaec1a0fSWilliam Breathitt Gray 582aaec1a0fSWilliam Breathitt Gray return 0; 583f1d8a071SWilliam Breathitt Gray } 584f1d8a071SWilliam Breathitt Gray 585aaec1a0fSWilliam Breathitt Gray static int quad8_count_mode_read(struct counter_device *counter, 586aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 587aaec1a0fSWilliam Breathitt Gray enum counter_count_mode *cnt_mode) 588f1d8a071SWilliam Breathitt Gray { 589aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 590f1d8a071SWilliam Breathitt Gray 591f1d8a071SWilliam Breathitt Gray /* Map 104-QUAD-8 count mode to Generic Counter count mode */ 592f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 593f1d8a071SWilliam Breathitt Gray case 0: 594f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NORMAL; 595f1d8a071SWilliam Breathitt Gray break; 596f1d8a071SWilliam Breathitt Gray case 1: 597f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_RANGE_LIMIT; 598f1d8a071SWilliam Breathitt Gray break; 599f1d8a071SWilliam Breathitt Gray case 2: 600f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NON_RECYCLE; 601f1d8a071SWilliam Breathitt Gray break; 602f1d8a071SWilliam Breathitt Gray case 3: 603f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_MODULO_N; 604f1d8a071SWilliam Breathitt Gray break; 605f1d8a071SWilliam Breathitt Gray } 606f1d8a071SWilliam Breathitt Gray 607f1d8a071SWilliam Breathitt Gray return 0; 608f1d8a071SWilliam Breathitt Gray } 609f1d8a071SWilliam Breathitt Gray 610aaec1a0fSWilliam Breathitt Gray static int quad8_count_mode_write(struct counter_device *counter, 611aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 612aaec1a0fSWilliam Breathitt Gray enum counter_count_mode cnt_mode) 613f1d8a071SWilliam Breathitt Gray { 614aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 615aaec1a0fSWilliam Breathitt Gray unsigned int count_mode; 616f1d8a071SWilliam Breathitt Gray unsigned int mode_cfg; 617f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 61809db4678SWilliam Breathitt Gray unsigned long irqflags; 619f1d8a071SWilliam Breathitt Gray 620f1d8a071SWilliam Breathitt Gray /* Map Generic Counter count mode to 104-QUAD-8 count mode */ 621f1d8a071SWilliam Breathitt Gray switch (cnt_mode) { 622f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NORMAL: 623aaec1a0fSWilliam Breathitt Gray count_mode = 0; 624f1d8a071SWilliam Breathitt Gray break; 625f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_RANGE_LIMIT: 626aaec1a0fSWilliam Breathitt Gray count_mode = 1; 627f1d8a071SWilliam Breathitt Gray break; 628f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NON_RECYCLE: 629aaec1a0fSWilliam Breathitt Gray count_mode = 2; 630f1d8a071SWilliam Breathitt Gray break; 631f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_MODULO_N: 632aaec1a0fSWilliam Breathitt Gray count_mode = 3; 633f1d8a071SWilliam Breathitt Gray break; 634b11eed15SWilliam Breathitt Gray default: 635b11eed15SWilliam Breathitt Gray /* should never reach this path */ 636b11eed15SWilliam Breathitt Gray return -EINVAL; 637f1d8a071SWilliam Breathitt Gray } 638f1d8a071SWilliam Breathitt Gray 63909db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 640fc069262SSyed Nayyar Waris 641aaec1a0fSWilliam Breathitt Gray priv->count_mode[count->id] = count_mode; 642f1d8a071SWilliam Breathitt Gray 643f1d8a071SWilliam Breathitt Gray /* Set count mode configuration value */ 644aaec1a0fSWilliam Breathitt Gray mode_cfg = count_mode << 1; 645f1d8a071SWilliam Breathitt Gray 646f1d8a071SWilliam Breathitt Gray /* Add quadrature mode configuration */ 647f1d8a071SWilliam Breathitt Gray if (priv->quadrature_mode[count->id]) 648f1d8a071SWilliam Breathitt Gray mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3; 649f1d8a071SWilliam Breathitt Gray 650f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 651f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 652f1d8a071SWilliam Breathitt Gray 65309db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 654fc069262SSyed Nayyar Waris 655f1d8a071SWilliam Breathitt Gray return 0; 656f1d8a071SWilliam Breathitt Gray } 657f1d8a071SWilliam Breathitt Gray 658aaec1a0fSWilliam Breathitt Gray static int quad8_count_enable_read(struct counter_device *counter, 659aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u8 *enable) 660f1d8a071SWilliam Breathitt Gray { 661aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 662f1d8a071SWilliam Breathitt Gray 663aaec1a0fSWilliam Breathitt Gray *enable = priv->ab_enable[count->id]; 664aaec1a0fSWilliam Breathitt Gray 665aaec1a0fSWilliam Breathitt Gray return 0; 666f1d8a071SWilliam Breathitt Gray } 667f1d8a071SWilliam Breathitt Gray 668aaec1a0fSWilliam Breathitt Gray static int quad8_count_enable_write(struct counter_device *counter, 669aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u8 enable) 670f1d8a071SWilliam Breathitt Gray { 671aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 672f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 67309db4678SWilliam Breathitt Gray unsigned long irqflags; 674f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 675f1d8a071SWilliam Breathitt Gray 67609db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 677fc069262SSyed Nayyar Waris 678aaec1a0fSWilliam Breathitt Gray priv->ab_enable[count->id] = enable; 679f1d8a071SWilliam Breathitt Gray 6807aa2ba0dSWilliam Breathitt Gray ior_cfg = enable | priv->preset_enable[count->id] << 1 | 6817aa2ba0dSWilliam Breathitt Gray priv->irq_trigger[count->id] << 3; 682f1d8a071SWilliam Breathitt Gray 683f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration */ 684f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1); 685f1d8a071SWilliam Breathitt Gray 68609db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 687fc069262SSyed Nayyar Waris 688aaec1a0fSWilliam Breathitt Gray return 0; 689f1d8a071SWilliam Breathitt Gray } 690f1d8a071SWilliam Breathitt Gray 691e357e81fSWilliam Breathitt Gray static const char *const quad8_noise_error_states[] = { 692e357e81fSWilliam Breathitt Gray "No excessive noise is present at the count inputs", 693e357e81fSWilliam Breathitt Gray "Excessive noise is present at the count inputs" 694e357e81fSWilliam Breathitt Gray }; 695e357e81fSWilliam Breathitt Gray 696f1d8a071SWilliam Breathitt Gray static int quad8_error_noise_get(struct counter_device *counter, 697aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u32 *noise_error) 698f1d8a071SWilliam Breathitt Gray { 699aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 700f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 701f1d8a071SWilliam Breathitt Gray 702f1d8a071SWilliam Breathitt Gray *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E); 703f1d8a071SWilliam Breathitt Gray 704f1d8a071SWilliam Breathitt Gray return 0; 705f1d8a071SWilliam Breathitt Gray } 706f1d8a071SWilliam Breathitt Gray 707aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_read(struct counter_device *counter, 708aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *preset) 709f1d8a071SWilliam Breathitt Gray { 710aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 711f1d8a071SWilliam Breathitt Gray 712aaec1a0fSWilliam Breathitt Gray *preset = priv->preset[count->id]; 713aaec1a0fSWilliam Breathitt Gray 714aaec1a0fSWilliam Breathitt Gray return 0; 715f1d8a071SWilliam Breathitt Gray } 716f1d8a071SWilliam Breathitt Gray 717e612b600SWilliam Breathitt Gray static void quad8_preset_register_set(struct quad8 *const priv, const int id, 718e612b600SWilliam Breathitt Gray const unsigned int preset) 719fc069262SSyed Nayyar Waris { 720e357e81fSWilliam Breathitt Gray const unsigned int base_offset = priv->base + 2 * id; 721fc069262SSyed Nayyar Waris int i; 722fc069262SSyed Nayyar Waris 723e357e81fSWilliam Breathitt Gray priv->preset[id] = preset; 724fc069262SSyed Nayyar Waris 725fc069262SSyed Nayyar Waris /* Reset Byte Pointer */ 726fc069262SSyed Nayyar Waris outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 727fc069262SSyed Nayyar Waris 728fc069262SSyed Nayyar Waris /* Set Preset Register */ 729fc069262SSyed Nayyar Waris for (i = 0; i < 3; i++) 730fc069262SSyed Nayyar Waris outb(preset >> (8 * i), base_offset); 731fc069262SSyed Nayyar Waris } 732fc069262SSyed Nayyar Waris 733aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_write(struct counter_device *counter, 734aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 preset) 735f1d8a071SWilliam Breathitt Gray { 736aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 73709db4678SWilliam Breathitt Gray unsigned long irqflags; 738f1d8a071SWilliam Breathitt Gray 739f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 740f1d8a071SWilliam Breathitt Gray if (preset > 0xFFFFFF) 741e2ff3198SWilliam Breathitt Gray return -ERANGE; 742f1d8a071SWilliam Breathitt Gray 74309db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 744f1d8a071SWilliam Breathitt Gray 745fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, preset); 746f1d8a071SWilliam Breathitt Gray 74709db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 748f1d8a071SWilliam Breathitt Gray 749aaec1a0fSWilliam Breathitt Gray return 0; 750f1d8a071SWilliam Breathitt Gray } 751f1d8a071SWilliam Breathitt Gray 752aaec1a0fSWilliam Breathitt Gray static int quad8_count_ceiling_read(struct counter_device *counter, 753aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *ceiling) 754f1d8a071SWilliam Breathitt Gray { 755aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 75609db4678SWilliam Breathitt Gray unsigned long irqflags; 757fc069262SSyed Nayyar Waris 75809db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 759f1d8a071SWilliam Breathitt Gray 760f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 761f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 762f1d8a071SWilliam Breathitt Gray case 1: 763f1d8a071SWilliam Breathitt Gray case 3: 764aaec1a0fSWilliam Breathitt Gray *ceiling = priv->preset[count->id]; 765aaec1a0fSWilliam Breathitt Gray break; 766aaec1a0fSWilliam Breathitt Gray default: 767f1d8a071SWilliam Breathitt Gray /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */ 768aaec1a0fSWilliam Breathitt Gray *ceiling = 0x1FFFFFF; 769aaec1a0fSWilliam Breathitt Gray break; 770f1d8a071SWilliam Breathitt Gray } 771f1d8a071SWilliam Breathitt Gray 77209db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 773aaec1a0fSWilliam Breathitt Gray 774aaec1a0fSWilliam Breathitt Gray return 0; 775aaec1a0fSWilliam Breathitt Gray } 776aaec1a0fSWilliam Breathitt Gray 777aaec1a0fSWilliam Breathitt Gray static int quad8_count_ceiling_write(struct counter_device *counter, 778aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 ceiling) 779f1d8a071SWilliam Breathitt Gray { 780aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 78109db4678SWilliam Breathitt Gray unsigned long irqflags; 782fc069262SSyed Nayyar Waris 783fc069262SSyed Nayyar Waris /* Only 24-bit values are supported */ 784fc069262SSyed Nayyar Waris if (ceiling > 0xFFFFFF) 785e2ff3198SWilliam Breathitt Gray return -ERANGE; 786fc069262SSyed Nayyar Waris 78709db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 788f1d8a071SWilliam Breathitt Gray 789f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 790f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 791f1d8a071SWilliam Breathitt Gray case 1: 792f1d8a071SWilliam Breathitt Gray case 3: 793fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, ceiling); 79409db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 795aaec1a0fSWilliam Breathitt Gray return 0; 796f1d8a071SWilliam Breathitt Gray } 797f1d8a071SWilliam Breathitt Gray 79809db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 799fc069262SSyed Nayyar Waris 800728246e8SWilliam Breathitt Gray return -EINVAL; 801f1d8a071SWilliam Breathitt Gray } 802f1d8a071SWilliam Breathitt Gray 803aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_enable_read(struct counter_device *counter, 804aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 805aaec1a0fSWilliam Breathitt Gray u8 *preset_enable) 806f1d8a071SWilliam Breathitt Gray { 807aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 808f1d8a071SWilliam Breathitt Gray 809aaec1a0fSWilliam Breathitt Gray *preset_enable = !priv->preset_enable[count->id]; 810aaec1a0fSWilliam Breathitt Gray 811aaec1a0fSWilliam Breathitt Gray return 0; 812f1d8a071SWilliam Breathitt Gray } 813f1d8a071SWilliam Breathitt Gray 814aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_enable_write(struct counter_device *counter, 815aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 816aaec1a0fSWilliam Breathitt Gray u8 preset_enable) 817f1d8a071SWilliam Breathitt Gray { 818aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 819f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 82009db4678SWilliam Breathitt Gray unsigned long irqflags; 821f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 822f1d8a071SWilliam Breathitt Gray 823f1d8a071SWilliam Breathitt Gray /* Preset enable is active low in Input/Output Control register */ 824f1d8a071SWilliam Breathitt Gray preset_enable = !preset_enable; 825f1d8a071SWilliam Breathitt Gray 82609db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 827fc069262SSyed Nayyar Waris 828f1d8a071SWilliam Breathitt Gray priv->preset_enable[count->id] = preset_enable; 829f1d8a071SWilliam Breathitt Gray 8307aa2ba0dSWilliam Breathitt Gray ior_cfg = priv->ab_enable[count->id] | preset_enable << 1 | 8317aa2ba0dSWilliam Breathitt Gray priv->irq_trigger[count->id] << 3; 832f1d8a071SWilliam Breathitt Gray 833f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration to Input / Output Control Register */ 834f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 835f1d8a071SWilliam Breathitt Gray 83609db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 837fc069262SSyed Nayyar Waris 838aaec1a0fSWilliam Breathitt Gray return 0; 839f1d8a071SWilliam Breathitt Gray } 840f1d8a071SWilliam Breathitt Gray 841aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_read(struct counter_device *counter, 842954ab5ccSWilliam Breathitt Gray struct counter_signal *signal, 843aaec1a0fSWilliam Breathitt Gray u8 *cable_fault) 844954ab5ccSWilliam Breathitt Gray { 845aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 846954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 84709db4678SWilliam Breathitt Gray unsigned long irqflags; 848708d9893SSyed Nayyar Waris bool disabled; 849954ab5ccSWilliam Breathitt Gray unsigned int status; 850954ab5ccSWilliam Breathitt Gray 85109db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 852708d9893SSyed Nayyar Waris 853708d9893SSyed Nayyar Waris disabled = !(priv->cable_fault_enable & BIT(channel_id)); 854708d9893SSyed Nayyar Waris 855708d9893SSyed Nayyar Waris if (disabled) { 85609db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 857954ab5ccSWilliam Breathitt Gray return -EINVAL; 858708d9893SSyed Nayyar Waris } 859954ab5ccSWilliam Breathitt Gray 860954ab5ccSWilliam Breathitt Gray /* Logic 0 = cable fault */ 861954ab5ccSWilliam Breathitt Gray status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 862954ab5ccSWilliam Breathitt Gray 86309db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 864708d9893SSyed Nayyar Waris 865954ab5ccSWilliam Breathitt Gray /* Mask respective channel and invert logic */ 866aaec1a0fSWilliam Breathitt Gray *cable_fault = !(status & BIT(channel_id)); 867954ab5ccSWilliam Breathitt Gray 868aaec1a0fSWilliam Breathitt Gray return 0; 869954ab5ccSWilliam Breathitt Gray } 870954ab5ccSWilliam Breathitt Gray 871aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_enable_read(struct counter_device *counter, 872aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 873aaec1a0fSWilliam Breathitt Gray u8 *enable) 874954ab5ccSWilliam Breathitt Gray { 875aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 876954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 877954ab5ccSWilliam Breathitt Gray 878aaec1a0fSWilliam Breathitt Gray *enable = !!(priv->cable_fault_enable & BIT(channel_id)); 879aaec1a0fSWilliam Breathitt Gray 880aaec1a0fSWilliam Breathitt Gray return 0; 881954ab5ccSWilliam Breathitt Gray } 882954ab5ccSWilliam Breathitt Gray 883aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_enable_write(struct counter_device *counter, 884aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 885aaec1a0fSWilliam Breathitt Gray u8 enable) 886954ab5ccSWilliam Breathitt Gray { 887aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 888954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 88909db4678SWilliam Breathitt Gray unsigned long irqflags; 890954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 891954ab5ccSWilliam Breathitt Gray 89209db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 893708d9893SSyed Nayyar Waris 894954ab5ccSWilliam Breathitt Gray if (enable) 895954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable |= BIT(channel_id); 896954ab5ccSWilliam Breathitt Gray else 897954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable &= ~BIT(channel_id); 898954ab5ccSWilliam Breathitt Gray 899954ab5ccSWilliam Breathitt Gray /* Enable is active low in Differential Encoder Cable Status register */ 900954ab5ccSWilliam Breathitt Gray cable_fault_enable = ~priv->cable_fault_enable; 901954ab5ccSWilliam Breathitt Gray 902954ab5ccSWilliam Breathitt Gray outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 903954ab5ccSWilliam Breathitt Gray 90409db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 905708d9893SSyed Nayyar Waris 906aaec1a0fSWilliam Breathitt Gray return 0; 907954ab5ccSWilliam Breathitt Gray } 908954ab5ccSWilliam Breathitt Gray 909aaec1a0fSWilliam Breathitt Gray static int quad8_signal_fck_prescaler_read(struct counter_device *counter, 910aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 911aaec1a0fSWilliam Breathitt Gray u8 *prescaler) 912de65d055SWilliam Breathitt Gray { 913aea8334bSUwe Kleine-König const struct quad8 *const priv = counter_priv(counter); 914de65d055SWilliam Breathitt Gray 915aaec1a0fSWilliam Breathitt Gray *prescaler = priv->fck_prescaler[signal->id / 2]; 916aaec1a0fSWilliam Breathitt Gray 917aaec1a0fSWilliam Breathitt Gray return 0; 918de65d055SWilliam Breathitt Gray } 919de65d055SWilliam Breathitt Gray 920aaec1a0fSWilliam Breathitt Gray static int quad8_signal_fck_prescaler_write(struct counter_device *counter, 921aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 922aaec1a0fSWilliam Breathitt Gray u8 prescaler) 923de65d055SWilliam Breathitt Gray { 924aea8334bSUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 925de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 926de65d055SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id; 92709db4678SWilliam Breathitt Gray unsigned long irqflags; 928de65d055SWilliam Breathitt Gray 92909db4678SWilliam Breathitt Gray spin_lock_irqsave(&priv->lock, irqflags); 930d5ed76adSSyed Nayyar Waris 931de65d055SWilliam Breathitt Gray priv->fck_prescaler[channel_id] = prescaler; 932de65d055SWilliam Breathitt Gray 933de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 934de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 935de65d055SWilliam Breathitt Gray 936de65d055SWilliam Breathitt Gray /* Set filter clock factor */ 937de65d055SWilliam Breathitt Gray outb(prescaler, base_offset); 938de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 939de65d055SWilliam Breathitt Gray base_offset + 1); 940de65d055SWilliam Breathitt Gray 94109db4678SWilliam Breathitt Gray spin_unlock_irqrestore(&priv->lock, irqflags); 942d5ed76adSSyed Nayyar Waris 943aaec1a0fSWilliam Breathitt Gray return 0; 944de65d055SWilliam Breathitt Gray } 945de65d055SWilliam Breathitt Gray 946aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_signal_ext[] = { 947aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_BOOL("cable_fault", quad8_signal_cable_fault_read, 948aaec1a0fSWilliam Breathitt Gray NULL), 949aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_BOOL("cable_fault_enable", 950aaec1a0fSWilliam Breathitt Gray quad8_signal_cable_fault_enable_read, 951aaec1a0fSWilliam Breathitt Gray quad8_signal_cable_fault_enable_write), 952aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_U8("filter_clock_prescaler", 953aaec1a0fSWilliam Breathitt Gray quad8_signal_fck_prescaler_read, 954aaec1a0fSWilliam Breathitt Gray quad8_signal_fck_prescaler_write) 955de65d055SWilliam Breathitt Gray }; 956de65d055SWilliam Breathitt Gray 957aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_index_pol_enum, quad8_index_polarity_modes); 958aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_synch_mode_enum, quad8_synchronous_modes); 959aaec1a0fSWilliam Breathitt Gray 960aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_index_ext[] = { 961aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_ENUM("index_polarity", quad8_index_polarity_get, 962aaec1a0fSWilliam Breathitt Gray quad8_index_polarity_set, 963aaec1a0fSWilliam Breathitt Gray quad8_index_pol_enum), 964aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_ENUM("synchronous_mode", quad8_synchronous_mode_get, 965aaec1a0fSWilliam Breathitt Gray quad8_synchronous_mode_set, 966aaec1a0fSWilliam Breathitt Gray quad8_synch_mode_enum), 967f1d8a071SWilliam Breathitt Gray }; 968f1d8a071SWilliam Breathitt Gray 969f1d8a071SWilliam Breathitt Gray #define QUAD8_QUAD_SIGNAL(_id, _name) { \ 970f1d8a071SWilliam Breathitt Gray .id = (_id), \ 971de65d055SWilliam Breathitt Gray .name = (_name), \ 972de65d055SWilliam Breathitt Gray .ext = quad8_signal_ext, \ 973de65d055SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_signal_ext) \ 974f1d8a071SWilliam Breathitt Gray } 975f1d8a071SWilliam Breathitt Gray 976f1d8a071SWilliam Breathitt Gray #define QUAD8_INDEX_SIGNAL(_id, _name) { \ 977f1d8a071SWilliam Breathitt Gray .id = (_id), \ 978f1d8a071SWilliam Breathitt Gray .name = (_name), \ 979f1d8a071SWilliam Breathitt Gray .ext = quad8_index_ext, \ 980f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_index_ext) \ 981f1d8a071SWilliam Breathitt Gray } 982f1d8a071SWilliam Breathitt Gray 983f1d8a071SWilliam Breathitt Gray static struct counter_signal quad8_signals[] = { 984f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(0, "Channel 1 Quadrature A"), 985f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(1, "Channel 1 Quadrature B"), 986f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(2, "Channel 2 Quadrature A"), 987f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(3, "Channel 2 Quadrature B"), 988f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(4, "Channel 3 Quadrature A"), 989f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(5, "Channel 3 Quadrature B"), 990f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(6, "Channel 4 Quadrature A"), 991f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(7, "Channel 4 Quadrature B"), 992f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(8, "Channel 5 Quadrature A"), 993f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(9, "Channel 5 Quadrature B"), 994f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(10, "Channel 6 Quadrature A"), 995f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(11, "Channel 6 Quadrature B"), 996f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(12, "Channel 7 Quadrature A"), 997f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(13, "Channel 7 Quadrature B"), 998f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(14, "Channel 8 Quadrature A"), 999f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(15, "Channel 8 Quadrature B"), 1000f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(16, "Channel 1 Index"), 1001f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(17, "Channel 2 Index"), 1002f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(18, "Channel 3 Index"), 1003f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(19, "Channel 4 Index"), 1004f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(20, "Channel 5 Index"), 1005f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(21, "Channel 6 Index"), 1006f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(22, "Channel 7 Index"), 1007f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(23, "Channel 8 Index") 1008f1d8a071SWilliam Breathitt Gray }; 1009f1d8a071SWilliam Breathitt Gray 1010f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT_SYNAPSES(_id) { \ 1011f1d8a071SWilliam Breathitt Gray { \ 1012f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 1013f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 1014f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) \ 1015f1d8a071SWilliam Breathitt Gray }, \ 1016f1d8a071SWilliam Breathitt Gray { \ 1017f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 1018f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 1019f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 1 \ 1020f1d8a071SWilliam Breathitt Gray }, \ 1021f1d8a071SWilliam Breathitt Gray { \ 1022f1d8a071SWilliam Breathitt Gray .actions_list = quad8_index_actions_list, \ 1023f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_index_actions_list), \ 1024f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 16 \ 1025f1d8a071SWilliam Breathitt Gray } \ 1026f1d8a071SWilliam Breathitt Gray } 1027f1d8a071SWilliam Breathitt Gray 1028f1d8a071SWilliam Breathitt Gray static struct counter_synapse quad8_count_synapses[][3] = { 1029f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(0), QUAD8_COUNT_SYNAPSES(1), 1030f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(2), QUAD8_COUNT_SYNAPSES(3), 1031f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(4), QUAD8_COUNT_SYNAPSES(5), 1032f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7) 1033f1d8a071SWilliam Breathitt Gray }; 1034f1d8a071SWilliam Breathitt Gray 1035aaec1a0fSWilliam Breathitt Gray static const enum counter_count_mode quad8_cnt_modes[] = { 1036aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_NORMAL, 1037aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_RANGE_LIMIT, 1038aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_NON_RECYCLE, 1039aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_MODULO_N, 1040aaec1a0fSWilliam Breathitt Gray }; 1041aaec1a0fSWilliam Breathitt Gray 1042aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_AVAILABLE(quad8_count_mode_available, quad8_cnt_modes); 1043aaec1a0fSWilliam Breathitt Gray 1044aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_error_noise_enum, quad8_noise_error_states); 1045aaec1a0fSWilliam Breathitt Gray 1046aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_count_ext[] = { 1047aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_CEILING(quad8_count_ceiling_read, 1048aaec1a0fSWilliam Breathitt Gray quad8_count_ceiling_write), 1049aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_FLOOR(quad8_count_floor_read, NULL), 1050aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_COUNT_MODE(quad8_count_mode_read, quad8_count_mode_write, 1051aaec1a0fSWilliam Breathitt Gray quad8_count_mode_available), 1052aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_DIRECTION(quad8_direction_read), 1053aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_ENABLE(quad8_count_enable_read, quad8_count_enable_write), 1054aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_COUNT_ENUM("error_noise", quad8_error_noise_get, NULL, 1055aaec1a0fSWilliam Breathitt Gray quad8_error_noise_enum), 1056aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_PRESET(quad8_count_preset_read, quad8_count_preset_write), 1057aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_PRESET_ENABLE(quad8_count_preset_enable_read, 1058aaec1a0fSWilliam Breathitt Gray quad8_count_preset_enable_write), 1059f1d8a071SWilliam Breathitt Gray }; 1060f1d8a071SWilliam Breathitt Gray 1061f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT(_id, _cntname) { \ 1062f1d8a071SWilliam Breathitt Gray .id = (_id), \ 1063f1d8a071SWilliam Breathitt Gray .name = (_cntname), \ 1064f1d8a071SWilliam Breathitt Gray .functions_list = quad8_count_functions_list, \ 1065f1d8a071SWilliam Breathitt Gray .num_functions = ARRAY_SIZE(quad8_count_functions_list), \ 1066f1d8a071SWilliam Breathitt Gray .synapses = quad8_count_synapses[(_id)], \ 1067f1d8a071SWilliam Breathitt Gray .num_synapses = 2, \ 1068f1d8a071SWilliam Breathitt Gray .ext = quad8_count_ext, \ 1069f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_count_ext) \ 1070f1d8a071SWilliam Breathitt Gray } 1071f1d8a071SWilliam Breathitt Gray 1072f1d8a071SWilliam Breathitt Gray static struct counter_count quad8_counts[] = { 1073f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(0, "Channel 1 Count"), 1074f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(1, "Channel 2 Count"), 1075f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(2, "Channel 3 Count"), 1076f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(3, "Channel 4 Count"), 1077f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(4, "Channel 5 Count"), 1078f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(5, "Channel 6 Count"), 1079f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(6, "Channel 7 Count"), 1080f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(7, "Channel 8 Count") 1081f1d8a071SWilliam Breathitt Gray }; 1082f1d8a071SWilliam Breathitt Gray 10837aa2ba0dSWilliam Breathitt Gray static irqreturn_t quad8_irq_handler(int irq, void *private) 10847aa2ba0dSWilliam Breathitt Gray { 1085*9e884bb1SUwe Kleine-König struct counter_device *counter = private; 1086*9e884bb1SUwe Kleine-König struct quad8 *const priv = counter_priv(counter); 10877aa2ba0dSWilliam Breathitt Gray const unsigned long base = priv->base; 10887aa2ba0dSWilliam Breathitt Gray unsigned long irq_status; 10897aa2ba0dSWilliam Breathitt Gray unsigned long channel; 10907aa2ba0dSWilliam Breathitt Gray u8 event; 10917aa2ba0dSWilliam Breathitt Gray 10927aa2ba0dSWilliam Breathitt Gray irq_status = inb(base + QUAD8_REG_INTERRUPT_STATUS); 10937aa2ba0dSWilliam Breathitt Gray if (!irq_status) 10947aa2ba0dSWilliam Breathitt Gray return IRQ_NONE; 10957aa2ba0dSWilliam Breathitt Gray 10967aa2ba0dSWilliam Breathitt Gray for_each_set_bit(channel, &irq_status, QUAD8_NUM_COUNTERS) { 10977aa2ba0dSWilliam Breathitt Gray switch (priv->irq_trigger[channel]) { 10987aa2ba0dSWilliam Breathitt Gray case QUAD8_EVENT_CARRY: 10997aa2ba0dSWilliam Breathitt Gray event = COUNTER_EVENT_OVERFLOW; 11007aa2ba0dSWilliam Breathitt Gray break; 11017aa2ba0dSWilliam Breathitt Gray case QUAD8_EVENT_COMPARE: 11027aa2ba0dSWilliam Breathitt Gray event = COUNTER_EVENT_THRESHOLD; 11037aa2ba0dSWilliam Breathitt Gray break; 11047aa2ba0dSWilliam Breathitt Gray case QUAD8_EVENT_CARRY_BORROW: 11057aa2ba0dSWilliam Breathitt Gray event = COUNTER_EVENT_OVERFLOW_UNDERFLOW; 11067aa2ba0dSWilliam Breathitt Gray break; 11077aa2ba0dSWilliam Breathitt Gray case QUAD8_EVENT_INDEX: 11087aa2ba0dSWilliam Breathitt Gray event = COUNTER_EVENT_INDEX; 11097aa2ba0dSWilliam Breathitt Gray break; 11107aa2ba0dSWilliam Breathitt Gray default: 11117aa2ba0dSWilliam Breathitt Gray /* should never reach this path */ 11127aa2ba0dSWilliam Breathitt Gray WARN_ONCE(true, "invalid interrupt trigger function %u configured for channel %lu\n", 11137aa2ba0dSWilliam Breathitt Gray priv->irq_trigger[channel], channel); 11147aa2ba0dSWilliam Breathitt Gray continue; 11157aa2ba0dSWilliam Breathitt Gray } 11167aa2ba0dSWilliam Breathitt Gray 1117*9e884bb1SUwe Kleine-König counter_push_event(counter, event, channel); 11187aa2ba0dSWilliam Breathitt Gray } 11197aa2ba0dSWilliam Breathitt Gray 11207aa2ba0dSWilliam Breathitt Gray /* Clear pending interrupts on device */ 11217aa2ba0dSWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base + QUAD8_REG_CHAN_OP); 11227aa2ba0dSWilliam Breathitt Gray 11237aa2ba0dSWilliam Breathitt Gray return IRQ_HANDLED; 11247aa2ba0dSWilliam Breathitt Gray } 11257aa2ba0dSWilliam Breathitt Gray 1126f1d8a071SWilliam Breathitt Gray static int quad8_probe(struct device *dev, unsigned int id) 1127f1d8a071SWilliam Breathitt Gray { 1128*9e884bb1SUwe Kleine-König struct counter_device *counter; 1129e357e81fSWilliam Breathitt Gray struct quad8 *priv; 1130f1d8a071SWilliam Breathitt Gray int i, j; 1131f1d8a071SWilliam Breathitt Gray unsigned int base_offset; 11327aa2ba0dSWilliam Breathitt Gray int err; 1133f1d8a071SWilliam Breathitt Gray 1134f1d8a071SWilliam Breathitt Gray if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) { 1135f1d8a071SWilliam Breathitt Gray dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", 1136f1d8a071SWilliam Breathitt Gray base[id], base[id] + QUAD8_EXTENT); 1137f1d8a071SWilliam Breathitt Gray return -EBUSY; 1138f1d8a071SWilliam Breathitt Gray } 1139f1d8a071SWilliam Breathitt Gray 1140*9e884bb1SUwe Kleine-König counter = devm_counter_alloc(dev, sizeof(*priv)); 1141*9e884bb1SUwe Kleine-König if (!counter) 1142f1d8a071SWilliam Breathitt Gray return -ENOMEM; 1143*9e884bb1SUwe Kleine-König priv = counter_priv(counter); 1144f1d8a071SWilliam Breathitt Gray 1145f1d8a071SWilliam Breathitt Gray /* Initialize Counter device and driver data */ 1146*9e884bb1SUwe Kleine-König counter->name = dev_name(dev); 1147*9e884bb1SUwe Kleine-König counter->parent = dev; 1148*9e884bb1SUwe Kleine-König counter->ops = &quad8_ops; 1149*9e884bb1SUwe Kleine-König counter->counts = quad8_counts; 1150*9e884bb1SUwe Kleine-König counter->num_counts = ARRAY_SIZE(quad8_counts); 1151*9e884bb1SUwe Kleine-König counter->signals = quad8_signals; 1152*9e884bb1SUwe Kleine-König counter->num_signals = ARRAY_SIZE(quad8_signals); 1153e357e81fSWilliam Breathitt Gray priv->base = base[id]; 1154f1d8a071SWilliam Breathitt Gray 115509db4678SWilliam Breathitt Gray spin_lock_init(&priv->lock); 1156fc069262SSyed Nayyar Waris 11577aa2ba0dSWilliam Breathitt Gray /* Reset Index/Interrupt Register */ 11587aa2ba0dSWilliam Breathitt Gray outb(0x00, base[id] + QUAD8_REG_INDEX_INTERRUPT); 1159f1d8a071SWilliam Breathitt Gray /* Reset all counters and disable interrupt function */ 1160f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1161f1d8a071SWilliam Breathitt Gray /* Set initial configuration for all counters */ 1162f1d8a071SWilliam Breathitt Gray for (i = 0; i < QUAD8_NUM_COUNTERS; i++) { 1163f1d8a071SWilliam Breathitt Gray base_offset = base[id] + 2 * i; 1164f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 1165f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1166de65d055SWilliam Breathitt Gray /* Reset filter clock factor */ 1167de65d055SWilliam Breathitt Gray outb(0, base_offset); 1168de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 1169de65d055SWilliam Breathitt Gray base_offset + 1); 1170de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 1171de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1172f1d8a071SWilliam Breathitt Gray /* Reset Preset Register */ 1173f1d8a071SWilliam Breathitt Gray for (j = 0; j < 3; j++) 1174f1d8a071SWilliam Breathitt Gray outb(0x00, base_offset); 1175f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 1176f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 1177f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 1178f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 1179f1d8a071SWilliam Breathitt Gray /* Binary encoding; Normal count; non-quadrature mode */ 1180f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR, base_offset + 1); 1181f1d8a071SWilliam Breathitt Gray /* Disable A and B inputs; preset on index; FLG1 as Carry */ 1182f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR, base_offset + 1); 1183f1d8a071SWilliam Breathitt Gray /* Disable index function; negative index polarity */ 1184f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR, base_offset + 1); 1185f1d8a071SWilliam Breathitt Gray } 1186954ab5ccSWilliam Breathitt Gray /* Disable Differential Encoder Cable Status for all channels */ 1187954ab5ccSWilliam Breathitt Gray outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS); 11887aa2ba0dSWilliam Breathitt Gray /* Enable all counters and enable interrupt function */ 11897aa2ba0dSWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base[id] + QUAD8_REG_CHAN_OP); 11907aa2ba0dSWilliam Breathitt Gray 11917aa2ba0dSWilliam Breathitt Gray err = devm_request_irq(dev, irq[id], quad8_irq_handler, IRQF_SHARED, 1192*9e884bb1SUwe Kleine-König counter->name, counter); 11937aa2ba0dSWilliam Breathitt Gray if (err) 11947aa2ba0dSWilliam Breathitt Gray return err; 1195f1d8a071SWilliam Breathitt Gray 1196*9e884bb1SUwe Kleine-König err = devm_counter_add(dev, counter); 1197*9e884bb1SUwe Kleine-König if (err < 0) 1198*9e884bb1SUwe Kleine-König return dev_err_probe(dev, err, "Failed to add counter\n"); 1199*9e884bb1SUwe Kleine-König 1200*9e884bb1SUwe Kleine-König return 0; 1201f1d8a071SWilliam Breathitt Gray } 1202f1d8a071SWilliam Breathitt Gray 1203f1d8a071SWilliam Breathitt Gray static struct isa_driver quad8_driver = { 1204f1d8a071SWilliam Breathitt Gray .probe = quad8_probe, 1205f1d8a071SWilliam Breathitt Gray .driver = { 1206f1d8a071SWilliam Breathitt Gray .name = "104-quad-8" 1207f1d8a071SWilliam Breathitt Gray } 1208f1d8a071SWilliam Breathitt Gray }; 1209f1d8a071SWilliam Breathitt Gray 1210f1d8a071SWilliam Breathitt Gray module_isa_driver(quad8_driver, num_quad8); 1211f1d8a071SWilliam Breathitt Gray 1212f1d8a071SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); 1213e357e81fSWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver"); 1214f1d8a071SWilliam Breathitt Gray MODULE_LICENSE("GPL v2"); 1215