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> 14f1d8a071SWilliam Breathitt Gray #include <linux/isa.h> 15f1d8a071SWilliam Breathitt Gray #include <linux/kernel.h> 16f1d8a071SWilliam Breathitt Gray #include <linux/module.h> 17f1d8a071SWilliam Breathitt Gray #include <linux/moduleparam.h> 18f1d8a071SWilliam Breathitt Gray #include <linux/types.h> 19f1d8a071SWilliam Breathitt Gray 20f1d8a071SWilliam Breathitt Gray #define QUAD8_EXTENT 32 21f1d8a071SWilliam Breathitt Gray 22f1d8a071SWilliam Breathitt Gray static unsigned int base[max_num_isa_dev(QUAD8_EXTENT)]; 23f1d8a071SWilliam Breathitt Gray static unsigned int num_quad8; 24af383bb1SWilliam Breathitt Gray module_param_hw_array(base, uint, ioport, &num_quad8, 0); 25f1d8a071SWilliam Breathitt Gray MODULE_PARM_DESC(base, "ACCES 104-QUAD-8 base addresses"); 26f1d8a071SWilliam Breathitt Gray 27f1d8a071SWilliam Breathitt Gray #define QUAD8_NUM_COUNTERS 8 28f1d8a071SWilliam Breathitt Gray 29f1d8a071SWilliam Breathitt Gray /** 30e357e81fSWilliam Breathitt Gray * struct quad8 - device private data structure 31f1d8a071SWilliam Breathitt Gray * @counter: instance of the counter_device 32954ab5ccSWilliam Breathitt Gray * @fck_prescaler: array of filter clock prescaler configurations 33f1d8a071SWilliam Breathitt Gray * @preset: array of preset values 34f1d8a071SWilliam Breathitt Gray * @count_mode: array of count mode configurations 35f1d8a071SWilliam Breathitt Gray * @quadrature_mode: array of quadrature mode configurations 36f1d8a071SWilliam Breathitt Gray * @quadrature_scale: array of quadrature mode scale configurations 37f1d8a071SWilliam Breathitt Gray * @ab_enable: array of A and B inputs enable configurations 38f1d8a071SWilliam Breathitt Gray * @preset_enable: array of set_to_preset_on_index attribute configurations 39f1d8a071SWilliam Breathitt Gray * @synchronous_mode: array of index function synchronous mode configurations 40f1d8a071SWilliam Breathitt Gray * @index_polarity: array of index function polarity configurations 41954ab5ccSWilliam Breathitt Gray * @cable_fault_enable: differential encoder cable status enable configurations 42e357e81fSWilliam Breathitt Gray * @base: base port address of the device 43f1d8a071SWilliam Breathitt Gray */ 44e357e81fSWilliam Breathitt Gray struct quad8 { 45fc069262SSyed Nayyar Waris struct mutex lock; 46f1d8a071SWilliam Breathitt Gray struct counter_device counter; 47de65d055SWilliam Breathitt Gray unsigned int fck_prescaler[QUAD8_NUM_COUNTERS]; 48f1d8a071SWilliam Breathitt Gray unsigned int preset[QUAD8_NUM_COUNTERS]; 49f1d8a071SWilliam Breathitt Gray unsigned int count_mode[QUAD8_NUM_COUNTERS]; 50f1d8a071SWilliam Breathitt Gray unsigned int quadrature_mode[QUAD8_NUM_COUNTERS]; 51f1d8a071SWilliam Breathitt Gray unsigned int quadrature_scale[QUAD8_NUM_COUNTERS]; 52f1d8a071SWilliam Breathitt Gray unsigned int ab_enable[QUAD8_NUM_COUNTERS]; 53f1d8a071SWilliam Breathitt Gray unsigned int preset_enable[QUAD8_NUM_COUNTERS]; 54f1d8a071SWilliam Breathitt Gray unsigned int synchronous_mode[QUAD8_NUM_COUNTERS]; 55f1d8a071SWilliam Breathitt Gray unsigned int index_polarity[QUAD8_NUM_COUNTERS]; 56954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 57f1d8a071SWilliam Breathitt Gray unsigned int base; 58f1d8a071SWilliam Breathitt Gray }; 59f1d8a071SWilliam Breathitt Gray 60f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_CHAN_OP 0x11 61f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_INDEX_INPUT_LEVELS 0x16 62954ab5ccSWilliam Breathitt Gray #define QUAD8_DIFF_ENCODER_CABLE_STATUS 0x17 63f1d8a071SWilliam Breathitt Gray /* Borrow Toggle flip-flop */ 64f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_BT BIT(0) 65f1d8a071SWilliam Breathitt Gray /* Carry Toggle flip-flop */ 66f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_CT BIT(1) 67f1d8a071SWilliam Breathitt Gray /* Error flag */ 68f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_E BIT(4) 69f1d8a071SWilliam Breathitt Gray /* Up/Down flag */ 70f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_UD BIT(5) 71f1d8a071SWilliam Breathitt Gray /* Reset and Load Signal Decoders */ 72f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_RLD 0x00 73f1d8a071SWilliam Breathitt Gray /* Counter Mode Register */ 74f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_CMR 0x20 75f1d8a071SWilliam Breathitt Gray /* Input / Output Control Register */ 76f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IOR 0x40 77f1d8a071SWilliam Breathitt Gray /* Index Control Register */ 78f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IDR 0x60 79f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer (three byte data pointer) */ 80f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_BP 0x01 81f1d8a071SWilliam Breathitt Gray /* Reset Counter */ 82f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_CNTR 0x02 83f1d8a071SWilliam Breathitt Gray /* Reset Borrow Toggle, Carry Toggle, Compare Toggle, and Sign flags */ 84f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_FLAGS 0x04 85f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 86f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_E 0x06 87f1d8a071SWilliam Breathitt Gray /* Preset Register to Counter */ 88f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_CNTR 0x08 89f1d8a071SWilliam Breathitt Gray /* Transfer Counter to Output Latch */ 90f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_CNTR_OUT 0x10 91de65d055SWilliam Breathitt Gray /* Transfer Preset Register LSB to FCK Prescaler */ 92de65d055SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_PSC 0x18 93f1d8a071SWilliam Breathitt Gray #define QUAD8_CHAN_OP_ENABLE_COUNTERS 0x00 94f1d8a071SWilliam Breathitt Gray #define QUAD8_CHAN_OP_RESET_COUNTERS 0x01 95f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X1 0x08 96f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X2 0x10 97f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X4 0x18 98f1d8a071SWilliam Breathitt Gray 99f1d8a071SWilliam Breathitt Gray static int quad8_signal_read(struct counter_device *counter, 100*493b938aSWilliam Breathitt Gray struct counter_signal *signal, 101*493b938aSWilliam Breathitt Gray enum counter_signal_level *level) 102f1d8a071SWilliam Breathitt Gray { 103e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 104f1d8a071SWilliam Breathitt Gray unsigned int state; 105f1d8a071SWilliam Breathitt Gray 106f1d8a071SWilliam Breathitt Gray /* Only Index signal levels can be read */ 107f1d8a071SWilliam Breathitt Gray if (signal->id < 16) 108f1d8a071SWilliam Breathitt Gray return -EINVAL; 109f1d8a071SWilliam Breathitt Gray 110f1d8a071SWilliam Breathitt Gray state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS) 111f1d8a071SWilliam Breathitt Gray & BIT(signal->id - 16); 112f1d8a071SWilliam Breathitt Gray 113*493b938aSWilliam Breathitt Gray *level = (state) ? COUNTER_SIGNAL_LEVEL_HIGH : COUNTER_SIGNAL_LEVEL_LOW; 114f1d8a071SWilliam Breathitt Gray 115f1d8a071SWilliam Breathitt Gray return 0; 116f1d8a071SWilliam Breathitt Gray } 117f1d8a071SWilliam Breathitt Gray 118f1d8a071SWilliam Breathitt Gray static int quad8_count_read(struct counter_device *counter, 119d49e6ee2SWilliam Breathitt Gray struct counter_count *count, unsigned long *val) 120f1d8a071SWilliam Breathitt Gray { 121e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 122f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 123f1d8a071SWilliam Breathitt Gray unsigned int flags; 124f1d8a071SWilliam Breathitt Gray unsigned int borrow; 125f1d8a071SWilliam Breathitt Gray unsigned int carry; 126f1d8a071SWilliam Breathitt Gray int i; 127f1d8a071SWilliam Breathitt Gray 128f1d8a071SWilliam Breathitt Gray flags = inb(base_offset + 1); 129f1d8a071SWilliam Breathitt Gray borrow = flags & QUAD8_FLAG_BT; 130f1d8a071SWilliam Breathitt Gray carry = !!(flags & QUAD8_FLAG_CT); 131f1d8a071SWilliam Breathitt Gray 132f1d8a071SWilliam Breathitt Gray /* Borrow XOR Carry effectively doubles count range */ 133d49e6ee2SWilliam Breathitt Gray *val = (unsigned long)(borrow ^ carry) << 24; 134f1d8a071SWilliam Breathitt Gray 135fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 136fc069262SSyed Nayyar Waris 137f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer; transfer Counter to Output Latch */ 138f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT, 139f1d8a071SWilliam Breathitt Gray base_offset + 1); 140f1d8a071SWilliam Breathitt Gray 141f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 142d49e6ee2SWilliam Breathitt Gray *val |= (unsigned long)inb(base_offset) << (8 * i); 143f1d8a071SWilliam Breathitt Gray 144fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 145fc069262SSyed Nayyar Waris 146f1d8a071SWilliam Breathitt Gray return 0; 147f1d8a071SWilliam Breathitt Gray } 148f1d8a071SWilliam Breathitt Gray 149f1d8a071SWilliam Breathitt Gray static int quad8_count_write(struct counter_device *counter, 150d49e6ee2SWilliam Breathitt Gray struct counter_count *count, unsigned long val) 151f1d8a071SWilliam Breathitt Gray { 152e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 153f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 154f1d8a071SWilliam Breathitt Gray int i; 155f1d8a071SWilliam Breathitt Gray 156f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 157d49e6ee2SWilliam Breathitt Gray if (val > 0xFFFFFF) 158e2ff3198SWilliam Breathitt Gray return -ERANGE; 159f1d8a071SWilliam Breathitt Gray 160fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 161fc069262SSyed Nayyar Waris 162f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 163f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 164f1d8a071SWilliam Breathitt Gray 165f1d8a071SWilliam Breathitt Gray /* Counter can only be set via Preset Register */ 166f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 167d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 168f1d8a071SWilliam Breathitt Gray 169f1d8a071SWilliam Breathitt Gray /* Transfer Preset Register to Counter */ 170f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1); 171f1d8a071SWilliam Breathitt Gray 172f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 173f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 174f1d8a071SWilliam Breathitt Gray 175f1d8a071SWilliam Breathitt Gray /* Set Preset Register back to original value */ 176d49e6ee2SWilliam Breathitt Gray val = priv->preset[count->id]; 177f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 178d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 179f1d8a071SWilliam Breathitt Gray 180f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 181f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 182f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 183f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 184f1d8a071SWilliam Breathitt Gray 185fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 186fc069262SSyed Nayyar Waris 187f1d8a071SWilliam Breathitt Gray return 0; 188f1d8a071SWilliam Breathitt Gray } 189f1d8a071SWilliam Breathitt Gray 190f1d8a071SWilliam Breathitt Gray enum quad8_count_function { 191f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = 0, 192f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X1, 193f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X2, 194f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X4 195f1d8a071SWilliam Breathitt Gray }; 196f1d8a071SWilliam Breathitt Gray 197fca2534fSWilliam Breathitt Gray static const enum counter_count_function quad8_count_functions_list[] = { 198f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_PULSE_DIRECTION] = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION, 199f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X1] = COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A, 200f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X2] = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A, 201f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X4] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4 202f1d8a071SWilliam Breathitt Gray }; 203f1d8a071SWilliam Breathitt Gray 204f1d8a071SWilliam Breathitt Gray static int quad8_function_get(struct counter_device *counter, 205f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *function) 206f1d8a071SWilliam Breathitt Gray { 207e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 208f1d8a071SWilliam Breathitt Gray const int id = count->id; 209f1d8a071SWilliam Breathitt Gray 210fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 211fc069262SSyed Nayyar Waris 212fc069262SSyed Nayyar Waris if (priv->quadrature_mode[id]) 213fc069262SSyed Nayyar Waris switch (priv->quadrature_scale[id]) { 214f1d8a071SWilliam Breathitt Gray case 0: 215f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X1; 216f1d8a071SWilliam Breathitt Gray break; 217f1d8a071SWilliam Breathitt Gray case 1: 218f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X2; 219f1d8a071SWilliam Breathitt Gray break; 220f1d8a071SWilliam Breathitt Gray case 2: 221f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X4; 222f1d8a071SWilliam Breathitt Gray break; 223f1d8a071SWilliam Breathitt Gray } 224f1d8a071SWilliam Breathitt Gray else 225f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_PULSE_DIRECTION; 226f1d8a071SWilliam Breathitt Gray 227fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 228fc069262SSyed Nayyar Waris 229f1d8a071SWilliam Breathitt Gray return 0; 230f1d8a071SWilliam Breathitt Gray } 231f1d8a071SWilliam Breathitt Gray 232f1d8a071SWilliam Breathitt Gray static int quad8_function_set(struct counter_device *counter, 233f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t function) 234f1d8a071SWilliam Breathitt Gray { 235e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 236f1d8a071SWilliam Breathitt Gray const int id = count->id; 237f1d8a071SWilliam Breathitt Gray unsigned int *const quadrature_mode = priv->quadrature_mode + id; 238f1d8a071SWilliam Breathitt Gray unsigned int *const scale = priv->quadrature_scale + id; 239f1d8a071SWilliam Breathitt Gray unsigned int *const synchronous_mode = priv->synchronous_mode + id; 240f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * id + 1; 241fc069262SSyed Nayyar Waris unsigned int mode_cfg; 242fc069262SSyed Nayyar Waris unsigned int idr_cfg; 243fc069262SSyed Nayyar Waris 244fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 245fc069262SSyed Nayyar Waris 246fc069262SSyed Nayyar Waris mode_cfg = priv->count_mode[id] << 1; 247fc069262SSyed Nayyar Waris idr_cfg = priv->index_polarity[id] << 1; 248f1d8a071SWilliam Breathitt Gray 249f1d8a071SWilliam Breathitt Gray if (function == QUAD8_COUNT_FUNCTION_PULSE_DIRECTION) { 250f1d8a071SWilliam Breathitt Gray *quadrature_mode = 0; 251f1d8a071SWilliam Breathitt Gray 252f1d8a071SWilliam Breathitt Gray /* Quadrature scaling only available in quadrature mode */ 253f1d8a071SWilliam Breathitt Gray *scale = 0; 254f1d8a071SWilliam Breathitt Gray 255f1d8a071SWilliam Breathitt Gray /* Synchronous function not supported in non-quadrature mode */ 256f1d8a071SWilliam Breathitt Gray if (*synchronous_mode) { 257f1d8a071SWilliam Breathitt Gray *synchronous_mode = 0; 258f1d8a071SWilliam Breathitt Gray /* Disable synchronous function mode */ 259f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 260f1d8a071SWilliam Breathitt Gray } 261f1d8a071SWilliam Breathitt Gray } else { 262f1d8a071SWilliam Breathitt Gray *quadrature_mode = 1; 263f1d8a071SWilliam Breathitt Gray 264f1d8a071SWilliam Breathitt Gray switch (function) { 265f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X1: 266f1d8a071SWilliam Breathitt Gray *scale = 0; 267f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X1; 268f1d8a071SWilliam Breathitt Gray break; 269f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X2: 270f1d8a071SWilliam Breathitt Gray *scale = 1; 271f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X2; 272f1d8a071SWilliam Breathitt Gray break; 273f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X4: 274f1d8a071SWilliam Breathitt Gray *scale = 2; 275f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X4; 276f1d8a071SWilliam Breathitt Gray break; 277b11eed15SWilliam Breathitt Gray default: 278b11eed15SWilliam Breathitt Gray /* should never reach this path */ 279b11eed15SWilliam Breathitt Gray mutex_unlock(&priv->lock); 280b11eed15SWilliam Breathitt Gray return -EINVAL; 281f1d8a071SWilliam Breathitt Gray } 282f1d8a071SWilliam Breathitt Gray } 283f1d8a071SWilliam Breathitt Gray 284f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 285f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 286f1d8a071SWilliam Breathitt Gray 287fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 288fc069262SSyed Nayyar Waris 289f1d8a071SWilliam Breathitt Gray return 0; 290f1d8a071SWilliam Breathitt Gray } 291f1d8a071SWilliam Breathitt Gray 292f1d8a071SWilliam Breathitt Gray static void quad8_direction_get(struct counter_device *counter, 293f1d8a071SWilliam Breathitt Gray struct counter_count *count, enum counter_count_direction *direction) 294f1d8a071SWilliam Breathitt Gray { 295e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 296f1d8a071SWilliam Breathitt Gray unsigned int ud_flag; 297f1d8a071SWilliam Breathitt Gray const unsigned int flag_addr = priv->base + 2 * count->id + 1; 298f1d8a071SWilliam Breathitt Gray 299f1d8a071SWilliam Breathitt Gray /* U/D flag: nonzero = up, zero = down */ 300f1d8a071SWilliam Breathitt Gray ud_flag = inb(flag_addr) & QUAD8_FLAG_UD; 301f1d8a071SWilliam Breathitt Gray 302f1d8a071SWilliam Breathitt Gray *direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD : 303f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_DIRECTION_BACKWARD; 304f1d8a071SWilliam Breathitt Gray } 305f1d8a071SWilliam Breathitt Gray 306f1d8a071SWilliam Breathitt Gray enum quad8_synapse_action { 307f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_NONE = 0, 308f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_RISING_EDGE, 309f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_FALLING_EDGE, 310f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_BOTH_EDGES 311f1d8a071SWilliam Breathitt Gray }; 312f1d8a071SWilliam Breathitt Gray 3136a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_index_actions_list[] = { 314f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, 315f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE 316f1d8a071SWilliam Breathitt Gray }; 317f1d8a071SWilliam Breathitt Gray 3186a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_synapse_actions_list[] = { 319f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, 320f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE, 321f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 322f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES 323f1d8a071SWilliam Breathitt Gray }; 324f1d8a071SWilliam Breathitt Gray 325f1d8a071SWilliam Breathitt Gray static int quad8_action_get(struct counter_device *counter, 326f1d8a071SWilliam Breathitt Gray struct counter_count *count, struct counter_synapse *synapse, 327f1d8a071SWilliam Breathitt Gray size_t *action) 328f1d8a071SWilliam Breathitt Gray { 329e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 330f1d8a071SWilliam Breathitt Gray int err; 331f1d8a071SWilliam Breathitt Gray size_t function = 0; 332f1d8a071SWilliam Breathitt Gray const size_t signal_a_id = count->synapses[0].signal->id; 333f1d8a071SWilliam Breathitt Gray enum counter_count_direction direction; 334f1d8a071SWilliam Breathitt Gray 335f1d8a071SWilliam Breathitt Gray /* Handle Index signals */ 336f1d8a071SWilliam Breathitt Gray if (synapse->signal->id >= 16) { 337f1d8a071SWilliam Breathitt Gray if (priv->preset_enable[count->id]) 338f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 339f1d8a071SWilliam Breathitt Gray else 340f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 341f1d8a071SWilliam Breathitt Gray 342f1d8a071SWilliam Breathitt Gray return 0; 343f1d8a071SWilliam Breathitt Gray } 344f1d8a071SWilliam Breathitt Gray 345f1d8a071SWilliam Breathitt Gray err = quad8_function_get(counter, count, &function); 346f1d8a071SWilliam Breathitt Gray if (err) 347f1d8a071SWilliam Breathitt Gray return err; 348f1d8a071SWilliam Breathitt Gray 349f1d8a071SWilliam Breathitt Gray /* Default action mode */ 350f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 351f1d8a071SWilliam Breathitt Gray 352f1d8a071SWilliam Breathitt Gray /* Determine action mode based on current count function mode */ 353f1d8a071SWilliam Breathitt Gray switch (function) { 354f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_PULSE_DIRECTION: 355f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 356f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 357b11eed15SWilliam Breathitt Gray return 0; 358f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X1: 359f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) { 360f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &direction); 361f1d8a071SWilliam Breathitt Gray 362f1d8a071SWilliam Breathitt Gray if (direction == COUNTER_COUNT_DIRECTION_FORWARD) 363f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 364f1d8a071SWilliam Breathitt Gray else 365f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_FALLING_EDGE; 366f1d8a071SWilliam Breathitt Gray } 367b11eed15SWilliam Breathitt Gray return 0; 368f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X2: 369f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 370f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 371b11eed15SWilliam Breathitt Gray return 0; 372f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X4: 373f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 374f1d8a071SWilliam Breathitt Gray return 0; 375b11eed15SWilliam Breathitt Gray default: 376b11eed15SWilliam Breathitt Gray /* should never reach this path */ 377b11eed15SWilliam Breathitt Gray return -EINVAL; 378b11eed15SWilliam Breathitt Gray } 379f1d8a071SWilliam Breathitt Gray } 380f1d8a071SWilliam Breathitt Gray 38117aa207eSYueHaibing static const struct counter_ops quad8_ops = { 382f1d8a071SWilliam Breathitt Gray .signal_read = quad8_signal_read, 383f1d8a071SWilliam Breathitt Gray .count_read = quad8_count_read, 384f1d8a071SWilliam Breathitt Gray .count_write = quad8_count_write, 385f1d8a071SWilliam Breathitt Gray .function_get = quad8_function_get, 386f1d8a071SWilliam Breathitt Gray .function_set = quad8_function_set, 387f1d8a071SWilliam Breathitt Gray .action_get = quad8_action_get 388f1d8a071SWilliam Breathitt Gray }; 389f1d8a071SWilliam Breathitt Gray 390e357e81fSWilliam Breathitt Gray static const char *const quad8_index_polarity_modes[] = { 391e357e81fSWilliam Breathitt Gray "negative", 392e357e81fSWilliam Breathitt Gray "positive" 393e357e81fSWilliam Breathitt Gray }; 394e357e81fSWilliam Breathitt Gray 395f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_get(struct counter_device *counter, 396f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *index_polarity) 397f1d8a071SWilliam Breathitt Gray { 398e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 399f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 400f1d8a071SWilliam Breathitt Gray 401f1d8a071SWilliam Breathitt Gray *index_polarity = priv->index_polarity[channel_id]; 402f1d8a071SWilliam Breathitt Gray 403f1d8a071SWilliam Breathitt Gray return 0; 404f1d8a071SWilliam Breathitt Gray } 405f1d8a071SWilliam Breathitt Gray 406f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_set(struct counter_device *counter, 407f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t index_polarity) 408f1d8a071SWilliam Breathitt Gray { 409e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 410f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 411f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 412fc069262SSyed Nayyar Waris unsigned int idr_cfg = index_polarity << 1; 413fc069262SSyed Nayyar Waris 414fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 415fc069262SSyed Nayyar Waris 416fc069262SSyed Nayyar Waris idr_cfg |= priv->synchronous_mode[channel_id]; 417f1d8a071SWilliam Breathitt Gray 418f1d8a071SWilliam Breathitt Gray priv->index_polarity[channel_id] = index_polarity; 419f1d8a071SWilliam Breathitt Gray 420f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 421f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 422f1d8a071SWilliam Breathitt Gray 423fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 424fc069262SSyed Nayyar Waris 425f1d8a071SWilliam Breathitt Gray return 0; 426f1d8a071SWilliam Breathitt Gray } 427f1d8a071SWilliam Breathitt Gray 428f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_index_pol_enum = { 429f1d8a071SWilliam Breathitt Gray .items = quad8_index_polarity_modes, 430f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_index_polarity_modes), 431f1d8a071SWilliam Breathitt Gray .get = quad8_index_polarity_get, 432f1d8a071SWilliam Breathitt Gray .set = quad8_index_polarity_set 433f1d8a071SWilliam Breathitt Gray }; 434f1d8a071SWilliam Breathitt Gray 435e357e81fSWilliam Breathitt Gray static const char *const quad8_synchronous_modes[] = { 436e357e81fSWilliam Breathitt Gray "non-synchronous", 437e357e81fSWilliam Breathitt Gray "synchronous" 438e357e81fSWilliam Breathitt Gray }; 439e357e81fSWilliam Breathitt Gray 440f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_get(struct counter_device *counter, 441f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *synchronous_mode) 442f1d8a071SWilliam Breathitt Gray { 443e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 444f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 445f1d8a071SWilliam Breathitt Gray 446f1d8a071SWilliam Breathitt Gray *synchronous_mode = priv->synchronous_mode[channel_id]; 447f1d8a071SWilliam Breathitt Gray 448f1d8a071SWilliam Breathitt Gray return 0; 449f1d8a071SWilliam Breathitt Gray } 450f1d8a071SWilliam Breathitt Gray 451f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_set(struct counter_device *counter, 452f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t synchronous_mode) 453f1d8a071SWilliam Breathitt Gray { 454e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 455f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 456f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 457fc069262SSyed Nayyar Waris unsigned int idr_cfg = synchronous_mode; 458fc069262SSyed Nayyar Waris 459fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 460fc069262SSyed Nayyar Waris 461fc069262SSyed Nayyar Waris idr_cfg |= priv->index_polarity[channel_id] << 1; 462f1d8a071SWilliam Breathitt Gray 463f1d8a071SWilliam Breathitt Gray /* Index function must be non-synchronous in non-quadrature mode */ 464fc069262SSyed Nayyar Waris if (synchronous_mode && !priv->quadrature_mode[channel_id]) { 465fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 466f1d8a071SWilliam Breathitt Gray return -EINVAL; 467fc069262SSyed Nayyar Waris } 468f1d8a071SWilliam Breathitt Gray 469f1d8a071SWilliam Breathitt Gray priv->synchronous_mode[channel_id] = synchronous_mode; 470f1d8a071SWilliam Breathitt Gray 471f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 472f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 473f1d8a071SWilliam Breathitt Gray 474fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 475fc069262SSyed Nayyar Waris 476f1d8a071SWilliam Breathitt Gray return 0; 477f1d8a071SWilliam Breathitt Gray } 478f1d8a071SWilliam Breathitt Gray 479f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_syn_mode_enum = { 480f1d8a071SWilliam Breathitt Gray .items = quad8_synchronous_modes, 481f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_synchronous_modes), 482f1d8a071SWilliam Breathitt Gray .get = quad8_synchronous_mode_get, 483f1d8a071SWilliam Breathitt Gray .set = quad8_synchronous_mode_set 484f1d8a071SWilliam Breathitt Gray }; 485f1d8a071SWilliam Breathitt Gray 486f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_floor_read(struct counter_device *counter, 487f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 488f1d8a071SWilliam Breathitt Gray { 489f1d8a071SWilliam Breathitt Gray /* Only a floor of 0 is supported */ 490f1d8a071SWilliam Breathitt Gray return sprintf(buf, "0\n"); 491f1d8a071SWilliam Breathitt Gray } 492f1d8a071SWilliam Breathitt Gray 493f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_get(struct counter_device *counter, 494f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *cnt_mode) 495f1d8a071SWilliam Breathitt Gray { 496e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 497f1d8a071SWilliam Breathitt Gray 498f1d8a071SWilliam Breathitt Gray /* Map 104-QUAD-8 count mode to Generic Counter count mode */ 499f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 500f1d8a071SWilliam Breathitt Gray case 0: 501f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NORMAL; 502f1d8a071SWilliam Breathitt Gray break; 503f1d8a071SWilliam Breathitt Gray case 1: 504f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_RANGE_LIMIT; 505f1d8a071SWilliam Breathitt Gray break; 506f1d8a071SWilliam Breathitt Gray case 2: 507f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NON_RECYCLE; 508f1d8a071SWilliam Breathitt Gray break; 509f1d8a071SWilliam Breathitt Gray case 3: 510f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_MODULO_N; 511f1d8a071SWilliam Breathitt Gray break; 512f1d8a071SWilliam Breathitt Gray } 513f1d8a071SWilliam Breathitt Gray 514f1d8a071SWilliam Breathitt Gray return 0; 515f1d8a071SWilliam Breathitt Gray } 516f1d8a071SWilliam Breathitt Gray 517f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_set(struct counter_device *counter, 518f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t cnt_mode) 519f1d8a071SWilliam Breathitt Gray { 520e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 521f1d8a071SWilliam Breathitt Gray unsigned int mode_cfg; 522f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 523f1d8a071SWilliam Breathitt Gray 524f1d8a071SWilliam Breathitt Gray /* Map Generic Counter count mode to 104-QUAD-8 count mode */ 525f1d8a071SWilliam Breathitt Gray switch (cnt_mode) { 526f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NORMAL: 527f1d8a071SWilliam Breathitt Gray cnt_mode = 0; 528f1d8a071SWilliam Breathitt Gray break; 529f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_RANGE_LIMIT: 530f1d8a071SWilliam Breathitt Gray cnt_mode = 1; 531f1d8a071SWilliam Breathitt Gray break; 532f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NON_RECYCLE: 533f1d8a071SWilliam Breathitt Gray cnt_mode = 2; 534f1d8a071SWilliam Breathitt Gray break; 535f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_MODULO_N: 536f1d8a071SWilliam Breathitt Gray cnt_mode = 3; 537f1d8a071SWilliam Breathitt Gray break; 538b11eed15SWilliam Breathitt Gray default: 539b11eed15SWilliam Breathitt Gray /* should never reach this path */ 540b11eed15SWilliam Breathitt Gray return -EINVAL; 541f1d8a071SWilliam Breathitt Gray } 542f1d8a071SWilliam Breathitt Gray 543fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 544fc069262SSyed Nayyar Waris 545f1d8a071SWilliam Breathitt Gray priv->count_mode[count->id] = cnt_mode; 546f1d8a071SWilliam Breathitt Gray 547f1d8a071SWilliam Breathitt Gray /* Set count mode configuration value */ 548f1d8a071SWilliam Breathitt Gray mode_cfg = cnt_mode << 1; 549f1d8a071SWilliam Breathitt Gray 550f1d8a071SWilliam Breathitt Gray /* Add quadrature mode configuration */ 551f1d8a071SWilliam Breathitt Gray if (priv->quadrature_mode[count->id]) 552f1d8a071SWilliam Breathitt Gray mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3; 553f1d8a071SWilliam Breathitt Gray 554f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 555f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 556f1d8a071SWilliam Breathitt Gray 557fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 558fc069262SSyed Nayyar Waris 559f1d8a071SWilliam Breathitt Gray return 0; 560f1d8a071SWilliam Breathitt Gray } 561f1d8a071SWilliam Breathitt Gray 562f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_cnt_mode_enum = { 563f1d8a071SWilliam Breathitt Gray .items = counter_count_mode_str, 564f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(counter_count_mode_str), 565f1d8a071SWilliam Breathitt Gray .get = quad8_count_mode_get, 566f1d8a071SWilliam Breathitt Gray .set = quad8_count_mode_set 567f1d8a071SWilliam Breathitt Gray }; 568f1d8a071SWilliam Breathitt Gray 569f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_direction_read(struct counter_device *counter, 570f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *priv, char *buf) 571f1d8a071SWilliam Breathitt Gray { 572f1d8a071SWilliam Breathitt Gray enum counter_count_direction dir; 573f1d8a071SWilliam Breathitt Gray 574f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &dir); 575f1d8a071SWilliam Breathitt Gray 576f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%s\n", counter_count_direction_str[dir]); 577f1d8a071SWilliam Breathitt Gray } 578f1d8a071SWilliam Breathitt Gray 579f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_read(struct counter_device *counter, 580f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 581f1d8a071SWilliam Breathitt Gray { 582e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 583f1d8a071SWilliam Breathitt Gray 584f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->ab_enable[count->id]); 585f1d8a071SWilliam Breathitt Gray } 586f1d8a071SWilliam Breathitt Gray 587f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_write(struct counter_device *counter, 588f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 589f1d8a071SWilliam Breathitt Gray { 590e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 591f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 592f1d8a071SWilliam Breathitt Gray int err; 593f1d8a071SWilliam Breathitt Gray bool ab_enable; 594f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 595f1d8a071SWilliam Breathitt Gray 596f1d8a071SWilliam Breathitt Gray err = kstrtobool(buf, &ab_enable); 597f1d8a071SWilliam Breathitt Gray if (err) 598f1d8a071SWilliam Breathitt Gray return err; 599f1d8a071SWilliam Breathitt Gray 600fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 601fc069262SSyed Nayyar Waris 602f1d8a071SWilliam Breathitt Gray priv->ab_enable[count->id] = ab_enable; 603f1d8a071SWilliam Breathitt Gray 604f1d8a071SWilliam Breathitt Gray ior_cfg = ab_enable | priv->preset_enable[count->id] << 1; 605f1d8a071SWilliam Breathitt Gray 606f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration */ 607f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1); 608f1d8a071SWilliam Breathitt Gray 609fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 610fc069262SSyed Nayyar Waris 611f1d8a071SWilliam Breathitt Gray return len; 612f1d8a071SWilliam Breathitt Gray } 613f1d8a071SWilliam Breathitt Gray 614e357e81fSWilliam Breathitt Gray static const char *const quad8_noise_error_states[] = { 615e357e81fSWilliam Breathitt Gray "No excessive noise is present at the count inputs", 616e357e81fSWilliam Breathitt Gray "Excessive noise is present at the count inputs" 617e357e81fSWilliam Breathitt Gray }; 618e357e81fSWilliam Breathitt Gray 619f1d8a071SWilliam Breathitt Gray static int quad8_error_noise_get(struct counter_device *counter, 620f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *noise_error) 621f1d8a071SWilliam Breathitt Gray { 622e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 623f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 624f1d8a071SWilliam Breathitt Gray 625f1d8a071SWilliam Breathitt Gray *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E); 626f1d8a071SWilliam Breathitt Gray 627f1d8a071SWilliam Breathitt Gray return 0; 628f1d8a071SWilliam Breathitt Gray } 629f1d8a071SWilliam Breathitt Gray 630f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_error_noise_enum = { 631f1d8a071SWilliam Breathitt Gray .items = quad8_noise_error_states, 632f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_noise_error_states), 633f1d8a071SWilliam Breathitt Gray .get = quad8_error_noise_get 634f1d8a071SWilliam Breathitt Gray }; 635f1d8a071SWilliam Breathitt Gray 636f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_read(struct counter_device *counter, 637f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 638f1d8a071SWilliam Breathitt Gray { 639e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 640f1d8a071SWilliam Breathitt Gray 641f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->preset[count->id]); 642f1d8a071SWilliam Breathitt Gray } 643f1d8a071SWilliam Breathitt Gray 644e612b600SWilliam Breathitt Gray static void quad8_preset_register_set(struct quad8 *const priv, const int id, 645e612b600SWilliam Breathitt Gray const unsigned int preset) 646fc069262SSyed Nayyar Waris { 647e357e81fSWilliam Breathitt Gray const unsigned int base_offset = priv->base + 2 * id; 648fc069262SSyed Nayyar Waris int i; 649fc069262SSyed Nayyar Waris 650e357e81fSWilliam Breathitt Gray priv->preset[id] = preset; 651fc069262SSyed Nayyar Waris 652fc069262SSyed Nayyar Waris /* Reset Byte Pointer */ 653fc069262SSyed Nayyar Waris outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 654fc069262SSyed Nayyar Waris 655fc069262SSyed Nayyar Waris /* Set Preset Register */ 656fc069262SSyed Nayyar Waris for (i = 0; i < 3; i++) 657fc069262SSyed Nayyar Waris outb(preset >> (8 * i), base_offset); 658fc069262SSyed Nayyar Waris } 659fc069262SSyed Nayyar Waris 660f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_write(struct counter_device *counter, 661f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 662f1d8a071SWilliam Breathitt Gray { 663e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 664f1d8a071SWilliam Breathitt Gray unsigned int preset; 665f1d8a071SWilliam Breathitt Gray int ret; 666f1d8a071SWilliam Breathitt Gray 667f1d8a071SWilliam Breathitt Gray ret = kstrtouint(buf, 0, &preset); 668f1d8a071SWilliam Breathitt Gray if (ret) 669f1d8a071SWilliam Breathitt Gray return ret; 670f1d8a071SWilliam Breathitt Gray 671f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 672f1d8a071SWilliam Breathitt Gray if (preset > 0xFFFFFF) 673e2ff3198SWilliam Breathitt Gray return -ERANGE; 674f1d8a071SWilliam Breathitt Gray 675fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 676f1d8a071SWilliam Breathitt Gray 677fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, preset); 678f1d8a071SWilliam Breathitt Gray 679fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 680f1d8a071SWilliam Breathitt Gray 681f1d8a071SWilliam Breathitt Gray return len; 682f1d8a071SWilliam Breathitt Gray } 683f1d8a071SWilliam Breathitt Gray 684f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_read(struct counter_device *counter, 685f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 686f1d8a071SWilliam Breathitt Gray { 687e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 688fc069262SSyed Nayyar Waris 689fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 690f1d8a071SWilliam Breathitt Gray 691f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 692f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 693f1d8a071SWilliam Breathitt Gray case 1: 694f1d8a071SWilliam Breathitt Gray case 3: 695fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 696fc069262SSyed Nayyar Waris return sprintf(buf, "%u\n", priv->preset[count->id]); 697f1d8a071SWilliam Breathitt Gray } 698f1d8a071SWilliam Breathitt Gray 699fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 700fc069262SSyed Nayyar Waris 701f1d8a071SWilliam Breathitt Gray /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */ 702f1d8a071SWilliam Breathitt Gray return sprintf(buf, "33554431\n"); 703f1d8a071SWilliam Breathitt Gray } 704f1d8a071SWilliam Breathitt Gray 705f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_write(struct counter_device *counter, 706f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 707f1d8a071SWilliam Breathitt Gray { 708e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 709fc069262SSyed Nayyar Waris unsigned int ceiling; 710fc069262SSyed Nayyar Waris int ret; 711fc069262SSyed Nayyar Waris 712fc069262SSyed Nayyar Waris ret = kstrtouint(buf, 0, &ceiling); 713fc069262SSyed Nayyar Waris if (ret) 714fc069262SSyed Nayyar Waris return ret; 715fc069262SSyed Nayyar Waris 716fc069262SSyed Nayyar Waris /* Only 24-bit values are supported */ 717fc069262SSyed Nayyar Waris if (ceiling > 0xFFFFFF) 718e2ff3198SWilliam Breathitt Gray return -ERANGE; 719fc069262SSyed Nayyar Waris 720fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 721f1d8a071SWilliam Breathitt Gray 722f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 723f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 724f1d8a071SWilliam Breathitt Gray case 1: 725f1d8a071SWilliam Breathitt Gray case 3: 726fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, ceiling); 727728246e8SWilliam Breathitt Gray mutex_unlock(&priv->lock); 728728246e8SWilliam Breathitt Gray return len; 729f1d8a071SWilliam Breathitt Gray } 730f1d8a071SWilliam Breathitt Gray 731fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 732fc069262SSyed Nayyar Waris 733728246e8SWilliam Breathitt Gray return -EINVAL; 734f1d8a071SWilliam Breathitt Gray } 735f1d8a071SWilliam Breathitt Gray 736f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_read(struct counter_device *counter, 737f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 738f1d8a071SWilliam Breathitt Gray { 739e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 740f1d8a071SWilliam Breathitt Gray 741f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", !priv->preset_enable[count->id]); 742f1d8a071SWilliam Breathitt Gray } 743f1d8a071SWilliam Breathitt Gray 744f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_write(struct counter_device *counter, 745f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 746f1d8a071SWilliam Breathitt Gray { 747e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 748f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 749f1d8a071SWilliam Breathitt Gray bool preset_enable; 750f1d8a071SWilliam Breathitt Gray int ret; 751f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 752f1d8a071SWilliam Breathitt Gray 753f1d8a071SWilliam Breathitt Gray ret = kstrtobool(buf, &preset_enable); 754f1d8a071SWilliam Breathitt Gray if (ret) 755f1d8a071SWilliam Breathitt Gray return ret; 756f1d8a071SWilliam Breathitt Gray 757f1d8a071SWilliam Breathitt Gray /* Preset enable is active low in Input/Output Control register */ 758f1d8a071SWilliam Breathitt Gray preset_enable = !preset_enable; 759f1d8a071SWilliam Breathitt Gray 760fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 761fc069262SSyed Nayyar Waris 762f1d8a071SWilliam Breathitt Gray priv->preset_enable[count->id] = preset_enable; 763f1d8a071SWilliam Breathitt Gray 764f1d8a071SWilliam Breathitt Gray ior_cfg = priv->ab_enable[count->id] | (unsigned int)preset_enable << 1; 765f1d8a071SWilliam Breathitt Gray 766f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration to Input / Output Control Register */ 767f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 768f1d8a071SWilliam Breathitt Gray 769fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 770fc069262SSyed Nayyar Waris 771f1d8a071SWilliam Breathitt Gray return len; 772f1d8a071SWilliam Breathitt Gray } 773f1d8a071SWilliam Breathitt Gray 774954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter, 775954ab5ccSWilliam Breathitt Gray struct counter_signal *signal, 776954ab5ccSWilliam Breathitt Gray void *private, char *buf) 777954ab5ccSWilliam Breathitt Gray { 778e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 779954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 780708d9893SSyed Nayyar Waris bool disabled; 781954ab5ccSWilliam Breathitt Gray unsigned int status; 782954ab5ccSWilliam Breathitt Gray unsigned int fault; 783954ab5ccSWilliam Breathitt Gray 784708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 785708d9893SSyed Nayyar Waris 786708d9893SSyed Nayyar Waris disabled = !(priv->cable_fault_enable & BIT(channel_id)); 787708d9893SSyed Nayyar Waris 788708d9893SSyed Nayyar Waris if (disabled) { 789708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 790954ab5ccSWilliam Breathitt Gray return -EINVAL; 791708d9893SSyed Nayyar Waris } 792954ab5ccSWilliam Breathitt Gray 793954ab5ccSWilliam Breathitt Gray /* Logic 0 = cable fault */ 794954ab5ccSWilliam Breathitt Gray status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 795954ab5ccSWilliam Breathitt Gray 796708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 797708d9893SSyed Nayyar Waris 798954ab5ccSWilliam Breathitt Gray /* Mask respective channel and invert logic */ 799954ab5ccSWilliam Breathitt Gray fault = !(status & BIT(channel_id)); 800954ab5ccSWilliam Breathitt Gray 801954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", fault); 802954ab5ccSWilliam Breathitt Gray } 803954ab5ccSWilliam Breathitt Gray 804954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_read( 805954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 806954ab5ccSWilliam Breathitt Gray void *private, char *buf) 807954ab5ccSWilliam Breathitt Gray { 808e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 809954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 810954ab5ccSWilliam Breathitt Gray const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id)); 811954ab5ccSWilliam Breathitt Gray 812954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", enb); 813954ab5ccSWilliam Breathitt Gray } 814954ab5ccSWilliam Breathitt Gray 815954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_write( 816954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 817954ab5ccSWilliam Breathitt Gray void *private, const char *buf, size_t len) 818954ab5ccSWilliam Breathitt Gray { 819e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 820954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 821954ab5ccSWilliam Breathitt Gray bool enable; 822954ab5ccSWilliam Breathitt Gray int ret; 823954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 824954ab5ccSWilliam Breathitt Gray 825954ab5ccSWilliam Breathitt Gray ret = kstrtobool(buf, &enable); 826954ab5ccSWilliam Breathitt Gray if (ret) 827954ab5ccSWilliam Breathitt Gray return ret; 828954ab5ccSWilliam Breathitt Gray 829708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 830708d9893SSyed Nayyar Waris 831954ab5ccSWilliam Breathitt Gray if (enable) 832954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable |= BIT(channel_id); 833954ab5ccSWilliam Breathitt Gray else 834954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable &= ~BIT(channel_id); 835954ab5ccSWilliam Breathitt Gray 836954ab5ccSWilliam Breathitt Gray /* Enable is active low in Differential Encoder Cable Status register */ 837954ab5ccSWilliam Breathitt Gray cable_fault_enable = ~priv->cable_fault_enable; 838954ab5ccSWilliam Breathitt Gray 839954ab5ccSWilliam Breathitt Gray outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 840954ab5ccSWilliam Breathitt Gray 841708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 842708d9893SSyed Nayyar Waris 843954ab5ccSWilliam Breathitt Gray return len; 844954ab5ccSWilliam Breathitt Gray } 845954ab5ccSWilliam Breathitt Gray 846de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter, 847de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, char *buf) 848de65d055SWilliam Breathitt Gray { 849e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 850de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 851de65d055SWilliam Breathitt Gray 852de65d055SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]); 853de65d055SWilliam Breathitt Gray } 854de65d055SWilliam Breathitt Gray 855de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter, 856de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, const char *buf, 857de65d055SWilliam Breathitt Gray size_t len) 858de65d055SWilliam Breathitt Gray { 859e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 860de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 861de65d055SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id; 862de65d055SWilliam Breathitt Gray u8 prescaler; 863de65d055SWilliam Breathitt Gray int ret; 864de65d055SWilliam Breathitt Gray 865de65d055SWilliam Breathitt Gray ret = kstrtou8(buf, 0, &prescaler); 866de65d055SWilliam Breathitt Gray if (ret) 867de65d055SWilliam Breathitt Gray return ret; 868de65d055SWilliam Breathitt Gray 869d5ed76adSSyed Nayyar Waris mutex_lock(&priv->lock); 870d5ed76adSSyed Nayyar Waris 871de65d055SWilliam Breathitt Gray priv->fck_prescaler[channel_id] = prescaler; 872de65d055SWilliam Breathitt Gray 873de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 874de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 875de65d055SWilliam Breathitt Gray 876de65d055SWilliam Breathitt Gray /* Set filter clock factor */ 877de65d055SWilliam Breathitt Gray outb(prescaler, base_offset); 878de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 879de65d055SWilliam Breathitt Gray base_offset + 1); 880de65d055SWilliam Breathitt Gray 881d5ed76adSSyed Nayyar Waris mutex_unlock(&priv->lock); 882d5ed76adSSyed Nayyar Waris 883de65d055SWilliam Breathitt Gray return len; 884de65d055SWilliam Breathitt Gray } 885de65d055SWilliam Breathitt Gray 886de65d055SWilliam Breathitt Gray static const struct counter_signal_ext quad8_signal_ext[] = { 887de65d055SWilliam Breathitt Gray { 888954ab5ccSWilliam Breathitt Gray .name = "cable_fault", 889954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_read 890954ab5ccSWilliam Breathitt Gray }, 891954ab5ccSWilliam Breathitt Gray { 892954ab5ccSWilliam Breathitt Gray .name = "cable_fault_enable", 893954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_enable_read, 894954ab5ccSWilliam Breathitt Gray .write = quad8_signal_cable_fault_enable_write 895954ab5ccSWilliam Breathitt Gray }, 896954ab5ccSWilliam Breathitt Gray { 897de65d055SWilliam Breathitt Gray .name = "filter_clock_prescaler", 898de65d055SWilliam Breathitt Gray .read = quad8_signal_fck_prescaler_read, 899de65d055SWilliam Breathitt Gray .write = quad8_signal_fck_prescaler_write 900de65d055SWilliam Breathitt Gray } 901de65d055SWilliam Breathitt Gray }; 902de65d055SWilliam Breathitt Gray 903f1d8a071SWilliam Breathitt Gray static const struct counter_signal_ext quad8_index_ext[] = { 904f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("index_polarity", &quad8_index_pol_enum), 905f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("index_polarity", &quad8_index_pol_enum), 906f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("synchronous_mode", &quad8_syn_mode_enum), 907f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("synchronous_mode", &quad8_syn_mode_enum) 908f1d8a071SWilliam Breathitt Gray }; 909f1d8a071SWilliam Breathitt Gray 910f1d8a071SWilliam Breathitt Gray #define QUAD8_QUAD_SIGNAL(_id, _name) { \ 911f1d8a071SWilliam Breathitt Gray .id = (_id), \ 912de65d055SWilliam Breathitt Gray .name = (_name), \ 913de65d055SWilliam Breathitt Gray .ext = quad8_signal_ext, \ 914de65d055SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_signal_ext) \ 915f1d8a071SWilliam Breathitt Gray } 916f1d8a071SWilliam Breathitt Gray 917f1d8a071SWilliam Breathitt Gray #define QUAD8_INDEX_SIGNAL(_id, _name) { \ 918f1d8a071SWilliam Breathitt Gray .id = (_id), \ 919f1d8a071SWilliam Breathitt Gray .name = (_name), \ 920f1d8a071SWilliam Breathitt Gray .ext = quad8_index_ext, \ 921f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_index_ext) \ 922f1d8a071SWilliam Breathitt Gray } 923f1d8a071SWilliam Breathitt Gray 924f1d8a071SWilliam Breathitt Gray static struct counter_signal quad8_signals[] = { 925f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(0, "Channel 1 Quadrature A"), 926f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(1, "Channel 1 Quadrature B"), 927f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(2, "Channel 2 Quadrature A"), 928f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(3, "Channel 2 Quadrature B"), 929f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(4, "Channel 3 Quadrature A"), 930f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(5, "Channel 3 Quadrature B"), 931f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(6, "Channel 4 Quadrature A"), 932f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(7, "Channel 4 Quadrature B"), 933f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(8, "Channel 5 Quadrature A"), 934f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(9, "Channel 5 Quadrature B"), 935f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(10, "Channel 6 Quadrature A"), 936f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(11, "Channel 6 Quadrature B"), 937f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(12, "Channel 7 Quadrature A"), 938f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(13, "Channel 7 Quadrature B"), 939f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(14, "Channel 8 Quadrature A"), 940f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(15, "Channel 8 Quadrature B"), 941f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(16, "Channel 1 Index"), 942f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(17, "Channel 2 Index"), 943f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(18, "Channel 3 Index"), 944f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(19, "Channel 4 Index"), 945f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(20, "Channel 5 Index"), 946f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(21, "Channel 6 Index"), 947f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(22, "Channel 7 Index"), 948f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(23, "Channel 8 Index") 949f1d8a071SWilliam Breathitt Gray }; 950f1d8a071SWilliam Breathitt Gray 951f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT_SYNAPSES(_id) { \ 952f1d8a071SWilliam Breathitt Gray { \ 953f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 954f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 955f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) \ 956f1d8a071SWilliam Breathitt Gray }, \ 957f1d8a071SWilliam Breathitt Gray { \ 958f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 959f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 960f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 1 \ 961f1d8a071SWilliam Breathitt Gray }, \ 962f1d8a071SWilliam Breathitt Gray { \ 963f1d8a071SWilliam Breathitt Gray .actions_list = quad8_index_actions_list, \ 964f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_index_actions_list), \ 965f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 16 \ 966f1d8a071SWilliam Breathitt Gray } \ 967f1d8a071SWilliam Breathitt Gray } 968f1d8a071SWilliam Breathitt Gray 969f1d8a071SWilliam Breathitt Gray static struct counter_synapse quad8_count_synapses[][3] = { 970f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(0), QUAD8_COUNT_SYNAPSES(1), 971f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(2), QUAD8_COUNT_SYNAPSES(3), 972f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(4), QUAD8_COUNT_SYNAPSES(5), 973f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7) 974f1d8a071SWilliam Breathitt Gray }; 975f1d8a071SWilliam Breathitt Gray 976f1d8a071SWilliam Breathitt Gray static const struct counter_count_ext quad8_count_ext[] = { 977f1d8a071SWilliam Breathitt Gray { 978f1d8a071SWilliam Breathitt Gray .name = "ceiling", 979f1d8a071SWilliam Breathitt Gray .read = quad8_count_ceiling_read, 980f1d8a071SWilliam Breathitt Gray .write = quad8_count_ceiling_write 981f1d8a071SWilliam Breathitt Gray }, 982f1d8a071SWilliam Breathitt Gray { 983f1d8a071SWilliam Breathitt Gray .name = "floor", 984f1d8a071SWilliam Breathitt Gray .read = quad8_count_floor_read 985f1d8a071SWilliam Breathitt Gray }, 986f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("count_mode", &quad8_cnt_mode_enum), 987f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("count_mode", &quad8_cnt_mode_enum), 988f1d8a071SWilliam Breathitt Gray { 989f1d8a071SWilliam Breathitt Gray .name = "direction", 990f1d8a071SWilliam Breathitt Gray .read = quad8_count_direction_read 991f1d8a071SWilliam Breathitt Gray }, 992f1d8a071SWilliam Breathitt Gray { 993f1d8a071SWilliam Breathitt Gray .name = "enable", 994f1d8a071SWilliam Breathitt Gray .read = quad8_count_enable_read, 995f1d8a071SWilliam Breathitt Gray .write = quad8_count_enable_write 996f1d8a071SWilliam Breathitt Gray }, 997f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("error_noise", &quad8_error_noise_enum), 998f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("error_noise", &quad8_error_noise_enum), 999f1d8a071SWilliam Breathitt Gray { 1000f1d8a071SWilliam Breathitt Gray .name = "preset", 1001f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_read, 1002f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_write 1003f1d8a071SWilliam Breathitt Gray }, 1004f1d8a071SWilliam Breathitt Gray { 1005f1d8a071SWilliam Breathitt Gray .name = "preset_enable", 1006f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_enable_read, 1007f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_enable_write 1008f1d8a071SWilliam Breathitt Gray } 1009f1d8a071SWilliam Breathitt Gray }; 1010f1d8a071SWilliam Breathitt Gray 1011f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT(_id, _cntname) { \ 1012f1d8a071SWilliam Breathitt Gray .id = (_id), \ 1013f1d8a071SWilliam Breathitt Gray .name = (_cntname), \ 1014f1d8a071SWilliam Breathitt Gray .functions_list = quad8_count_functions_list, \ 1015f1d8a071SWilliam Breathitt Gray .num_functions = ARRAY_SIZE(quad8_count_functions_list), \ 1016f1d8a071SWilliam Breathitt Gray .synapses = quad8_count_synapses[(_id)], \ 1017f1d8a071SWilliam Breathitt Gray .num_synapses = 2, \ 1018f1d8a071SWilliam Breathitt Gray .ext = quad8_count_ext, \ 1019f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_count_ext) \ 1020f1d8a071SWilliam Breathitt Gray } 1021f1d8a071SWilliam Breathitt Gray 1022f1d8a071SWilliam Breathitt Gray static struct counter_count quad8_counts[] = { 1023f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(0, "Channel 1 Count"), 1024f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(1, "Channel 2 Count"), 1025f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(2, "Channel 3 Count"), 1026f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(3, "Channel 4 Count"), 1027f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(4, "Channel 5 Count"), 1028f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(5, "Channel 6 Count"), 1029f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(6, "Channel 7 Count"), 1030f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(7, "Channel 8 Count") 1031f1d8a071SWilliam Breathitt Gray }; 1032f1d8a071SWilliam Breathitt Gray 1033f1d8a071SWilliam Breathitt Gray static int quad8_probe(struct device *dev, unsigned int id) 1034f1d8a071SWilliam Breathitt Gray { 1035e357e81fSWilliam Breathitt Gray struct quad8 *priv; 1036f1d8a071SWilliam Breathitt Gray int i, j; 1037f1d8a071SWilliam Breathitt Gray unsigned int base_offset; 1038f1d8a071SWilliam Breathitt Gray 1039f1d8a071SWilliam Breathitt Gray if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) { 1040f1d8a071SWilliam Breathitt Gray dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", 1041f1d8a071SWilliam Breathitt Gray base[id], base[id] + QUAD8_EXTENT); 1042f1d8a071SWilliam Breathitt Gray return -EBUSY; 1043f1d8a071SWilliam Breathitt Gray } 1044f1d8a071SWilliam Breathitt Gray 1045e357e81fSWilliam Breathitt Gray priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1046e357e81fSWilliam Breathitt Gray if (!priv) 1047f1d8a071SWilliam Breathitt Gray return -ENOMEM; 1048f1d8a071SWilliam Breathitt Gray 1049f1d8a071SWilliam Breathitt Gray /* Initialize Counter device and driver data */ 1050e357e81fSWilliam Breathitt Gray priv->counter.name = dev_name(dev); 1051e357e81fSWilliam Breathitt Gray priv->counter.parent = dev; 1052e357e81fSWilliam Breathitt Gray priv->counter.ops = &quad8_ops; 1053e357e81fSWilliam Breathitt Gray priv->counter.counts = quad8_counts; 1054e357e81fSWilliam Breathitt Gray priv->counter.num_counts = ARRAY_SIZE(quad8_counts); 1055e357e81fSWilliam Breathitt Gray priv->counter.signals = quad8_signals; 1056e357e81fSWilliam Breathitt Gray priv->counter.num_signals = ARRAY_SIZE(quad8_signals); 1057e357e81fSWilliam Breathitt Gray priv->counter.priv = priv; 1058e357e81fSWilliam Breathitt Gray priv->base = base[id]; 1059f1d8a071SWilliam Breathitt Gray 1060fc069262SSyed Nayyar Waris /* Initialize mutex */ 1061e357e81fSWilliam Breathitt Gray mutex_init(&priv->lock); 1062fc069262SSyed Nayyar Waris 1063f1d8a071SWilliam Breathitt Gray /* Reset all counters and disable interrupt function */ 1064f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1065f1d8a071SWilliam Breathitt Gray /* Set initial configuration for all counters */ 1066f1d8a071SWilliam Breathitt Gray for (i = 0; i < QUAD8_NUM_COUNTERS; i++) { 1067f1d8a071SWilliam Breathitt Gray base_offset = base[id] + 2 * i; 1068f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 1069f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1070de65d055SWilliam Breathitt Gray /* Reset filter clock factor */ 1071de65d055SWilliam Breathitt Gray outb(0, base_offset); 1072de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 1073de65d055SWilliam Breathitt Gray base_offset + 1); 1074de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 1075de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1076f1d8a071SWilliam Breathitt Gray /* Reset Preset Register */ 1077f1d8a071SWilliam Breathitt Gray for (j = 0; j < 3; j++) 1078f1d8a071SWilliam Breathitt Gray outb(0x00, base_offset); 1079f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 1080f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 1081f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 1082f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 1083f1d8a071SWilliam Breathitt Gray /* Binary encoding; Normal count; non-quadrature mode */ 1084f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR, base_offset + 1); 1085f1d8a071SWilliam Breathitt Gray /* Disable A and B inputs; preset on index; FLG1 as Carry */ 1086f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR, base_offset + 1); 1087f1d8a071SWilliam Breathitt Gray /* Disable index function; negative index polarity */ 1088f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR, base_offset + 1); 1089f1d8a071SWilliam Breathitt Gray } 1090954ab5ccSWilliam Breathitt Gray /* Disable Differential Encoder Cable Status for all channels */ 1091954ab5ccSWilliam Breathitt Gray outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS); 1092f1d8a071SWilliam Breathitt Gray /* Enable all counters */ 1093f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1094f1d8a071SWilliam Breathitt Gray 1095e357e81fSWilliam Breathitt Gray return devm_counter_register(dev, &priv->counter); 1096f1d8a071SWilliam Breathitt Gray } 1097f1d8a071SWilliam Breathitt Gray 1098f1d8a071SWilliam Breathitt Gray static struct isa_driver quad8_driver = { 1099f1d8a071SWilliam Breathitt Gray .probe = quad8_probe, 1100f1d8a071SWilliam Breathitt Gray .driver = { 1101f1d8a071SWilliam Breathitt Gray .name = "104-quad-8" 1102f1d8a071SWilliam Breathitt Gray } 1103f1d8a071SWilliam Breathitt Gray }; 1104f1d8a071SWilliam Breathitt Gray 1105f1d8a071SWilliam Breathitt Gray module_isa_driver(quad8_driver, num_quad8); 1106f1d8a071SWilliam Breathitt Gray 1107f1d8a071SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); 1108e357e81fSWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver"); 1109f1d8a071SWilliam Breathitt Gray MODULE_LICENSE("GPL v2"); 1110