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; 24*af383bb1SWilliam 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, 100d49e6ee2SWilliam Breathitt Gray struct counter_signal *signal, enum counter_signal_value *val) 101f1d8a071SWilliam Breathitt Gray { 102e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 103f1d8a071SWilliam Breathitt Gray unsigned int state; 104f1d8a071SWilliam Breathitt Gray 105f1d8a071SWilliam Breathitt Gray /* Only Index signal levels can be read */ 106f1d8a071SWilliam Breathitt Gray if (signal->id < 16) 107f1d8a071SWilliam Breathitt Gray return -EINVAL; 108f1d8a071SWilliam Breathitt Gray 109f1d8a071SWilliam Breathitt Gray state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS) 110f1d8a071SWilliam Breathitt Gray & BIT(signal->id - 16); 111f1d8a071SWilliam Breathitt Gray 112d49e6ee2SWilliam Breathitt Gray *val = (state) ? COUNTER_SIGNAL_HIGH : COUNTER_SIGNAL_LOW; 113f1d8a071SWilliam Breathitt Gray 114f1d8a071SWilliam Breathitt Gray return 0; 115f1d8a071SWilliam Breathitt Gray } 116f1d8a071SWilliam Breathitt Gray 117f1d8a071SWilliam Breathitt Gray static int quad8_count_read(struct counter_device *counter, 118d49e6ee2SWilliam Breathitt Gray struct counter_count *count, unsigned long *val) 119f1d8a071SWilliam Breathitt Gray { 120e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 121f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 122f1d8a071SWilliam Breathitt Gray unsigned int flags; 123f1d8a071SWilliam Breathitt Gray unsigned int borrow; 124f1d8a071SWilliam Breathitt Gray unsigned int carry; 125f1d8a071SWilliam Breathitt Gray int i; 126f1d8a071SWilliam Breathitt Gray 127f1d8a071SWilliam Breathitt Gray flags = inb(base_offset + 1); 128f1d8a071SWilliam Breathitt Gray borrow = flags & QUAD8_FLAG_BT; 129f1d8a071SWilliam Breathitt Gray carry = !!(flags & QUAD8_FLAG_CT); 130f1d8a071SWilliam Breathitt Gray 131f1d8a071SWilliam Breathitt Gray /* Borrow XOR Carry effectively doubles count range */ 132d49e6ee2SWilliam Breathitt Gray *val = (unsigned long)(borrow ^ carry) << 24; 133f1d8a071SWilliam Breathitt Gray 134fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 135fc069262SSyed Nayyar Waris 136f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer; transfer Counter to Output Latch */ 137f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT, 138f1d8a071SWilliam Breathitt Gray base_offset + 1); 139f1d8a071SWilliam Breathitt Gray 140f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 141d49e6ee2SWilliam Breathitt Gray *val |= (unsigned long)inb(base_offset) << (8 * i); 142f1d8a071SWilliam Breathitt Gray 143fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 144fc069262SSyed Nayyar Waris 145f1d8a071SWilliam Breathitt Gray return 0; 146f1d8a071SWilliam Breathitt Gray } 147f1d8a071SWilliam Breathitt Gray 148f1d8a071SWilliam Breathitt Gray static int quad8_count_write(struct counter_device *counter, 149d49e6ee2SWilliam Breathitt Gray struct counter_count *count, unsigned long val) 150f1d8a071SWilliam Breathitt Gray { 151e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 152f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 153f1d8a071SWilliam Breathitt Gray int i; 154f1d8a071SWilliam Breathitt Gray 155f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 156d49e6ee2SWilliam Breathitt Gray if (val > 0xFFFFFF) 157f1d8a071SWilliam Breathitt Gray return -EINVAL; 158f1d8a071SWilliam Breathitt Gray 159fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 160fc069262SSyed Nayyar Waris 161f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 162f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 163f1d8a071SWilliam Breathitt Gray 164f1d8a071SWilliam Breathitt Gray /* Counter can only be set via Preset Register */ 165f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 166d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 167f1d8a071SWilliam Breathitt Gray 168f1d8a071SWilliam Breathitt Gray /* Transfer Preset Register to Counter */ 169f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1); 170f1d8a071SWilliam Breathitt Gray 171f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 172f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 173f1d8a071SWilliam Breathitt Gray 174f1d8a071SWilliam Breathitt Gray /* Set Preset Register back to original value */ 175d49e6ee2SWilliam Breathitt Gray val = priv->preset[count->id]; 176f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 177d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 178f1d8a071SWilliam Breathitt Gray 179f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 180f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 181f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 182f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 183f1d8a071SWilliam Breathitt Gray 184fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 185fc069262SSyed Nayyar Waris 186f1d8a071SWilliam Breathitt Gray return 0; 187f1d8a071SWilliam Breathitt Gray } 188f1d8a071SWilliam Breathitt Gray 189f1d8a071SWilliam Breathitt Gray enum quad8_count_function { 190f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = 0, 191f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X1, 192f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X2, 193f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_FUNCTION_QUADRATURE_X4 194f1d8a071SWilliam Breathitt Gray }; 195f1d8a071SWilliam Breathitt Gray 196f1d8a071SWilliam Breathitt Gray static enum counter_count_function quad8_count_functions_list[] = { 197f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_PULSE_DIRECTION] = COUNTER_COUNT_FUNCTION_PULSE_DIRECTION, 198f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X1] = COUNTER_COUNT_FUNCTION_QUADRATURE_X1_A, 199f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X2] = COUNTER_COUNT_FUNCTION_QUADRATURE_X2_A, 200f1d8a071SWilliam Breathitt Gray [QUAD8_COUNT_FUNCTION_QUADRATURE_X4] = COUNTER_COUNT_FUNCTION_QUADRATURE_X4 201f1d8a071SWilliam Breathitt Gray }; 202f1d8a071SWilliam Breathitt Gray 203f1d8a071SWilliam Breathitt Gray static int quad8_function_get(struct counter_device *counter, 204f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *function) 205f1d8a071SWilliam Breathitt Gray { 206e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 207f1d8a071SWilliam Breathitt Gray const int id = count->id; 208f1d8a071SWilliam Breathitt Gray 209fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 210fc069262SSyed Nayyar Waris 211fc069262SSyed Nayyar Waris if (priv->quadrature_mode[id]) 212fc069262SSyed Nayyar Waris switch (priv->quadrature_scale[id]) { 213f1d8a071SWilliam Breathitt Gray case 0: 214f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X1; 215f1d8a071SWilliam Breathitt Gray break; 216f1d8a071SWilliam Breathitt Gray case 1: 217f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X2; 218f1d8a071SWilliam Breathitt Gray break; 219f1d8a071SWilliam Breathitt Gray case 2: 220f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X4; 221f1d8a071SWilliam Breathitt Gray break; 222f1d8a071SWilliam Breathitt Gray } 223f1d8a071SWilliam Breathitt Gray else 224f1d8a071SWilliam Breathitt Gray *function = QUAD8_COUNT_FUNCTION_PULSE_DIRECTION; 225f1d8a071SWilliam Breathitt Gray 226fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 227fc069262SSyed Nayyar Waris 228f1d8a071SWilliam Breathitt Gray return 0; 229f1d8a071SWilliam Breathitt Gray } 230f1d8a071SWilliam Breathitt Gray 231f1d8a071SWilliam Breathitt Gray static int quad8_function_set(struct counter_device *counter, 232f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t function) 233f1d8a071SWilliam Breathitt Gray { 234e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 235f1d8a071SWilliam Breathitt Gray const int id = count->id; 236f1d8a071SWilliam Breathitt Gray unsigned int *const quadrature_mode = priv->quadrature_mode + id; 237f1d8a071SWilliam Breathitt Gray unsigned int *const scale = priv->quadrature_scale + id; 238f1d8a071SWilliam Breathitt Gray unsigned int *const synchronous_mode = priv->synchronous_mode + id; 239f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * id + 1; 240fc069262SSyed Nayyar Waris unsigned int mode_cfg; 241fc069262SSyed Nayyar Waris unsigned int idr_cfg; 242fc069262SSyed Nayyar Waris 243fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 244fc069262SSyed Nayyar Waris 245fc069262SSyed Nayyar Waris mode_cfg = priv->count_mode[id] << 1; 246fc069262SSyed Nayyar Waris idr_cfg = priv->index_polarity[id] << 1; 247f1d8a071SWilliam Breathitt Gray 248f1d8a071SWilliam Breathitt Gray if (function == QUAD8_COUNT_FUNCTION_PULSE_DIRECTION) { 249f1d8a071SWilliam Breathitt Gray *quadrature_mode = 0; 250f1d8a071SWilliam Breathitt Gray 251f1d8a071SWilliam Breathitt Gray /* Quadrature scaling only available in quadrature mode */ 252f1d8a071SWilliam Breathitt Gray *scale = 0; 253f1d8a071SWilliam Breathitt Gray 254f1d8a071SWilliam Breathitt Gray /* Synchronous function not supported in non-quadrature mode */ 255f1d8a071SWilliam Breathitt Gray if (*synchronous_mode) { 256f1d8a071SWilliam Breathitt Gray *synchronous_mode = 0; 257f1d8a071SWilliam Breathitt Gray /* Disable synchronous function mode */ 258f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 259f1d8a071SWilliam Breathitt Gray } 260f1d8a071SWilliam Breathitt Gray } else { 261f1d8a071SWilliam Breathitt Gray *quadrature_mode = 1; 262f1d8a071SWilliam Breathitt Gray 263f1d8a071SWilliam Breathitt Gray switch (function) { 264f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X1: 265f1d8a071SWilliam Breathitt Gray *scale = 0; 266f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X1; 267f1d8a071SWilliam Breathitt Gray break; 268f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X2: 269f1d8a071SWilliam Breathitt Gray *scale = 1; 270f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X2; 271f1d8a071SWilliam Breathitt Gray break; 272f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X4: 273f1d8a071SWilliam Breathitt Gray *scale = 2; 274f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X4; 275f1d8a071SWilliam Breathitt Gray break; 276f1d8a071SWilliam Breathitt Gray } 277f1d8a071SWilliam Breathitt Gray } 278f1d8a071SWilliam Breathitt Gray 279f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 280f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 281f1d8a071SWilliam Breathitt Gray 282fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 283fc069262SSyed Nayyar Waris 284f1d8a071SWilliam Breathitt Gray return 0; 285f1d8a071SWilliam Breathitt Gray } 286f1d8a071SWilliam Breathitt Gray 287f1d8a071SWilliam Breathitt Gray static void quad8_direction_get(struct counter_device *counter, 288f1d8a071SWilliam Breathitt Gray struct counter_count *count, enum counter_count_direction *direction) 289f1d8a071SWilliam Breathitt Gray { 290e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 291f1d8a071SWilliam Breathitt Gray unsigned int ud_flag; 292f1d8a071SWilliam Breathitt Gray const unsigned int flag_addr = priv->base + 2 * count->id + 1; 293f1d8a071SWilliam Breathitt Gray 294f1d8a071SWilliam Breathitt Gray /* U/D flag: nonzero = up, zero = down */ 295f1d8a071SWilliam Breathitt Gray ud_flag = inb(flag_addr) & QUAD8_FLAG_UD; 296f1d8a071SWilliam Breathitt Gray 297f1d8a071SWilliam Breathitt Gray *direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD : 298f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_DIRECTION_BACKWARD; 299f1d8a071SWilliam Breathitt Gray } 300f1d8a071SWilliam Breathitt Gray 301f1d8a071SWilliam Breathitt Gray enum quad8_synapse_action { 302f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_NONE = 0, 303f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_RISING_EDGE, 304f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_FALLING_EDGE, 305f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_BOTH_EDGES 306f1d8a071SWilliam Breathitt Gray }; 307f1d8a071SWilliam Breathitt Gray 308f1d8a071SWilliam Breathitt Gray static enum counter_synapse_action quad8_index_actions_list[] = { 309f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, 310f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE 311f1d8a071SWilliam Breathitt Gray }; 312f1d8a071SWilliam Breathitt Gray 313f1d8a071SWilliam Breathitt Gray static enum counter_synapse_action quad8_synapse_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 [QUAD8_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 317f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES 318f1d8a071SWilliam Breathitt Gray }; 319f1d8a071SWilliam Breathitt Gray 320f1d8a071SWilliam Breathitt Gray static int quad8_action_get(struct counter_device *counter, 321f1d8a071SWilliam Breathitt Gray struct counter_count *count, struct counter_synapse *synapse, 322f1d8a071SWilliam Breathitt Gray size_t *action) 323f1d8a071SWilliam Breathitt Gray { 324e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 325f1d8a071SWilliam Breathitt Gray int err; 326f1d8a071SWilliam Breathitt Gray size_t function = 0; 327f1d8a071SWilliam Breathitt Gray const size_t signal_a_id = count->synapses[0].signal->id; 328f1d8a071SWilliam Breathitt Gray enum counter_count_direction direction; 329f1d8a071SWilliam Breathitt Gray 330f1d8a071SWilliam Breathitt Gray /* Handle Index signals */ 331f1d8a071SWilliam Breathitt Gray if (synapse->signal->id >= 16) { 332f1d8a071SWilliam Breathitt Gray if (priv->preset_enable[count->id]) 333f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 334f1d8a071SWilliam Breathitt Gray else 335f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 336f1d8a071SWilliam Breathitt Gray 337f1d8a071SWilliam Breathitt Gray return 0; 338f1d8a071SWilliam Breathitt Gray } 339f1d8a071SWilliam Breathitt Gray 340f1d8a071SWilliam Breathitt Gray err = quad8_function_get(counter, count, &function); 341f1d8a071SWilliam Breathitt Gray if (err) 342f1d8a071SWilliam Breathitt Gray return err; 343f1d8a071SWilliam Breathitt Gray 344f1d8a071SWilliam Breathitt Gray /* Default action mode */ 345f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 346f1d8a071SWilliam Breathitt Gray 347f1d8a071SWilliam Breathitt Gray /* Determine action mode based on current count function mode */ 348f1d8a071SWilliam Breathitt Gray switch (function) { 349f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_PULSE_DIRECTION: 350f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 351f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 352f1d8a071SWilliam Breathitt Gray break; 353f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X1: 354f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) { 355f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &direction); 356f1d8a071SWilliam Breathitt Gray 357f1d8a071SWilliam Breathitt Gray if (direction == COUNTER_COUNT_DIRECTION_FORWARD) 358f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 359f1d8a071SWilliam Breathitt Gray else 360f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_FALLING_EDGE; 361f1d8a071SWilliam Breathitt Gray } 362f1d8a071SWilliam Breathitt Gray break; 363f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X2: 364f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 365f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 366f1d8a071SWilliam Breathitt Gray break; 367f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X4: 368f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 369f1d8a071SWilliam Breathitt Gray break; 370f1d8a071SWilliam Breathitt Gray } 371f1d8a071SWilliam Breathitt Gray 372f1d8a071SWilliam Breathitt Gray return 0; 373f1d8a071SWilliam Breathitt Gray } 374f1d8a071SWilliam Breathitt Gray 37517aa207eSYueHaibing static const struct counter_ops quad8_ops = { 376f1d8a071SWilliam Breathitt Gray .signal_read = quad8_signal_read, 377f1d8a071SWilliam Breathitt Gray .count_read = quad8_count_read, 378f1d8a071SWilliam Breathitt Gray .count_write = quad8_count_write, 379f1d8a071SWilliam Breathitt Gray .function_get = quad8_function_get, 380f1d8a071SWilliam Breathitt Gray .function_set = quad8_function_set, 381f1d8a071SWilliam Breathitt Gray .action_get = quad8_action_get 382f1d8a071SWilliam Breathitt Gray }; 383f1d8a071SWilliam Breathitt Gray 384e357e81fSWilliam Breathitt Gray static const char *const quad8_index_polarity_modes[] = { 385e357e81fSWilliam Breathitt Gray "negative", 386e357e81fSWilliam Breathitt Gray "positive" 387e357e81fSWilliam Breathitt Gray }; 388e357e81fSWilliam Breathitt Gray 389f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_get(struct counter_device *counter, 390f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *index_polarity) 391f1d8a071SWilliam Breathitt Gray { 392e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 393f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 394f1d8a071SWilliam Breathitt Gray 395f1d8a071SWilliam Breathitt Gray *index_polarity = priv->index_polarity[channel_id]; 396f1d8a071SWilliam Breathitt Gray 397f1d8a071SWilliam Breathitt Gray return 0; 398f1d8a071SWilliam Breathitt Gray } 399f1d8a071SWilliam Breathitt Gray 400f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_set(struct counter_device *counter, 401f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t index_polarity) 402f1d8a071SWilliam Breathitt Gray { 403e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 404f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 405f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 406fc069262SSyed Nayyar Waris unsigned int idr_cfg = index_polarity << 1; 407fc069262SSyed Nayyar Waris 408fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 409fc069262SSyed Nayyar Waris 410fc069262SSyed Nayyar Waris idr_cfg |= priv->synchronous_mode[channel_id]; 411f1d8a071SWilliam Breathitt Gray 412f1d8a071SWilliam Breathitt Gray priv->index_polarity[channel_id] = index_polarity; 413f1d8a071SWilliam Breathitt Gray 414f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 415f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 416f1d8a071SWilliam Breathitt Gray 417fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 418fc069262SSyed Nayyar Waris 419f1d8a071SWilliam Breathitt Gray return 0; 420f1d8a071SWilliam Breathitt Gray } 421f1d8a071SWilliam Breathitt Gray 422f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_index_pol_enum = { 423f1d8a071SWilliam Breathitt Gray .items = quad8_index_polarity_modes, 424f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_index_polarity_modes), 425f1d8a071SWilliam Breathitt Gray .get = quad8_index_polarity_get, 426f1d8a071SWilliam Breathitt Gray .set = quad8_index_polarity_set 427f1d8a071SWilliam Breathitt Gray }; 428f1d8a071SWilliam Breathitt Gray 429e357e81fSWilliam Breathitt Gray static const char *const quad8_synchronous_modes[] = { 430e357e81fSWilliam Breathitt Gray "non-synchronous", 431e357e81fSWilliam Breathitt Gray "synchronous" 432e357e81fSWilliam Breathitt Gray }; 433e357e81fSWilliam Breathitt Gray 434f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_get(struct counter_device *counter, 435f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *synchronous_mode) 436f1d8a071SWilliam Breathitt Gray { 437e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 438f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 439f1d8a071SWilliam Breathitt Gray 440f1d8a071SWilliam Breathitt Gray *synchronous_mode = priv->synchronous_mode[channel_id]; 441f1d8a071SWilliam Breathitt Gray 442f1d8a071SWilliam Breathitt Gray return 0; 443f1d8a071SWilliam Breathitt Gray } 444f1d8a071SWilliam Breathitt Gray 445f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_set(struct counter_device *counter, 446f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t synchronous_mode) 447f1d8a071SWilliam Breathitt Gray { 448e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 449f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 450f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 451fc069262SSyed Nayyar Waris unsigned int idr_cfg = synchronous_mode; 452fc069262SSyed Nayyar Waris 453fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 454fc069262SSyed Nayyar Waris 455fc069262SSyed Nayyar Waris idr_cfg |= priv->index_polarity[channel_id] << 1; 456f1d8a071SWilliam Breathitt Gray 457f1d8a071SWilliam Breathitt Gray /* Index function must be non-synchronous in non-quadrature mode */ 458fc069262SSyed Nayyar Waris if (synchronous_mode && !priv->quadrature_mode[channel_id]) { 459fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 460f1d8a071SWilliam Breathitt Gray return -EINVAL; 461fc069262SSyed Nayyar Waris } 462f1d8a071SWilliam Breathitt Gray 463f1d8a071SWilliam Breathitt Gray priv->synchronous_mode[channel_id] = synchronous_mode; 464f1d8a071SWilliam Breathitt Gray 465f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 466f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 467f1d8a071SWilliam Breathitt Gray 468fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 469fc069262SSyed Nayyar Waris 470f1d8a071SWilliam Breathitt Gray return 0; 471f1d8a071SWilliam Breathitt Gray } 472f1d8a071SWilliam Breathitt Gray 473f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_syn_mode_enum = { 474f1d8a071SWilliam Breathitt Gray .items = quad8_synchronous_modes, 475f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_synchronous_modes), 476f1d8a071SWilliam Breathitt Gray .get = quad8_synchronous_mode_get, 477f1d8a071SWilliam Breathitt Gray .set = quad8_synchronous_mode_set 478f1d8a071SWilliam Breathitt Gray }; 479f1d8a071SWilliam Breathitt Gray 480f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_floor_read(struct counter_device *counter, 481f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 482f1d8a071SWilliam Breathitt Gray { 483f1d8a071SWilliam Breathitt Gray /* Only a floor of 0 is supported */ 484f1d8a071SWilliam Breathitt Gray return sprintf(buf, "0\n"); 485f1d8a071SWilliam Breathitt Gray } 486f1d8a071SWilliam Breathitt Gray 487f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_get(struct counter_device *counter, 488f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *cnt_mode) 489f1d8a071SWilliam Breathitt Gray { 490e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 491f1d8a071SWilliam Breathitt Gray 492f1d8a071SWilliam Breathitt Gray /* Map 104-QUAD-8 count mode to Generic Counter count mode */ 493f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 494f1d8a071SWilliam Breathitt Gray case 0: 495f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NORMAL; 496f1d8a071SWilliam Breathitt Gray break; 497f1d8a071SWilliam Breathitt Gray case 1: 498f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_RANGE_LIMIT; 499f1d8a071SWilliam Breathitt Gray break; 500f1d8a071SWilliam Breathitt Gray case 2: 501f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NON_RECYCLE; 502f1d8a071SWilliam Breathitt Gray break; 503f1d8a071SWilliam Breathitt Gray case 3: 504f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_MODULO_N; 505f1d8a071SWilliam Breathitt Gray break; 506f1d8a071SWilliam Breathitt Gray } 507f1d8a071SWilliam Breathitt Gray 508f1d8a071SWilliam Breathitt Gray return 0; 509f1d8a071SWilliam Breathitt Gray } 510f1d8a071SWilliam Breathitt Gray 511f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_set(struct counter_device *counter, 512f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t cnt_mode) 513f1d8a071SWilliam Breathitt Gray { 514e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 515f1d8a071SWilliam Breathitt Gray unsigned int mode_cfg; 516f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 517f1d8a071SWilliam Breathitt Gray 518f1d8a071SWilliam Breathitt Gray /* Map Generic Counter count mode to 104-QUAD-8 count mode */ 519f1d8a071SWilliam Breathitt Gray switch (cnt_mode) { 520f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NORMAL: 521f1d8a071SWilliam Breathitt Gray cnt_mode = 0; 522f1d8a071SWilliam Breathitt Gray break; 523f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_RANGE_LIMIT: 524f1d8a071SWilliam Breathitt Gray cnt_mode = 1; 525f1d8a071SWilliam Breathitt Gray break; 526f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NON_RECYCLE: 527f1d8a071SWilliam Breathitt Gray cnt_mode = 2; 528f1d8a071SWilliam Breathitt Gray break; 529f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_MODULO_N: 530f1d8a071SWilliam Breathitt Gray cnt_mode = 3; 531f1d8a071SWilliam Breathitt Gray break; 532f1d8a071SWilliam Breathitt Gray } 533f1d8a071SWilliam Breathitt Gray 534fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 535fc069262SSyed Nayyar Waris 536f1d8a071SWilliam Breathitt Gray priv->count_mode[count->id] = cnt_mode; 537f1d8a071SWilliam Breathitt Gray 538f1d8a071SWilliam Breathitt Gray /* Set count mode configuration value */ 539f1d8a071SWilliam Breathitt Gray mode_cfg = cnt_mode << 1; 540f1d8a071SWilliam Breathitt Gray 541f1d8a071SWilliam Breathitt Gray /* Add quadrature mode configuration */ 542f1d8a071SWilliam Breathitt Gray if (priv->quadrature_mode[count->id]) 543f1d8a071SWilliam Breathitt Gray mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3; 544f1d8a071SWilliam Breathitt Gray 545f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 546f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 547f1d8a071SWilliam Breathitt Gray 548fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 549fc069262SSyed Nayyar Waris 550f1d8a071SWilliam Breathitt Gray return 0; 551f1d8a071SWilliam Breathitt Gray } 552f1d8a071SWilliam Breathitt Gray 553f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_cnt_mode_enum = { 554f1d8a071SWilliam Breathitt Gray .items = counter_count_mode_str, 555f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(counter_count_mode_str), 556f1d8a071SWilliam Breathitt Gray .get = quad8_count_mode_get, 557f1d8a071SWilliam Breathitt Gray .set = quad8_count_mode_set 558f1d8a071SWilliam Breathitt Gray }; 559f1d8a071SWilliam Breathitt Gray 560f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_direction_read(struct counter_device *counter, 561f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *priv, char *buf) 562f1d8a071SWilliam Breathitt Gray { 563f1d8a071SWilliam Breathitt Gray enum counter_count_direction dir; 564f1d8a071SWilliam Breathitt Gray 565f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &dir); 566f1d8a071SWilliam Breathitt Gray 567f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%s\n", counter_count_direction_str[dir]); 568f1d8a071SWilliam Breathitt Gray } 569f1d8a071SWilliam Breathitt Gray 570f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_read(struct counter_device *counter, 571f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 572f1d8a071SWilliam Breathitt Gray { 573e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 574f1d8a071SWilliam Breathitt Gray 575f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->ab_enable[count->id]); 576f1d8a071SWilliam Breathitt Gray } 577f1d8a071SWilliam Breathitt Gray 578f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_write(struct counter_device *counter, 579f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 580f1d8a071SWilliam Breathitt Gray { 581e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 582f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 583f1d8a071SWilliam Breathitt Gray int err; 584f1d8a071SWilliam Breathitt Gray bool ab_enable; 585f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 586f1d8a071SWilliam Breathitt Gray 587f1d8a071SWilliam Breathitt Gray err = kstrtobool(buf, &ab_enable); 588f1d8a071SWilliam Breathitt Gray if (err) 589f1d8a071SWilliam Breathitt Gray return err; 590f1d8a071SWilliam Breathitt Gray 591fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 592fc069262SSyed Nayyar Waris 593f1d8a071SWilliam Breathitt Gray priv->ab_enable[count->id] = ab_enable; 594f1d8a071SWilliam Breathitt Gray 595f1d8a071SWilliam Breathitt Gray ior_cfg = ab_enable | priv->preset_enable[count->id] << 1; 596f1d8a071SWilliam Breathitt Gray 597f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration */ 598f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1); 599f1d8a071SWilliam Breathitt Gray 600fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 601fc069262SSyed Nayyar Waris 602f1d8a071SWilliam Breathitt Gray return len; 603f1d8a071SWilliam Breathitt Gray } 604f1d8a071SWilliam Breathitt Gray 605e357e81fSWilliam Breathitt Gray static const char *const quad8_noise_error_states[] = { 606e357e81fSWilliam Breathitt Gray "No excessive noise is present at the count inputs", 607e357e81fSWilliam Breathitt Gray "Excessive noise is present at the count inputs" 608e357e81fSWilliam Breathitt Gray }; 609e357e81fSWilliam Breathitt Gray 610f1d8a071SWilliam Breathitt Gray static int quad8_error_noise_get(struct counter_device *counter, 611f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *noise_error) 612f1d8a071SWilliam Breathitt Gray { 613e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 614f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 615f1d8a071SWilliam Breathitt Gray 616f1d8a071SWilliam Breathitt Gray *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E); 617f1d8a071SWilliam Breathitt Gray 618f1d8a071SWilliam Breathitt Gray return 0; 619f1d8a071SWilliam Breathitt Gray } 620f1d8a071SWilliam Breathitt Gray 621f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_error_noise_enum = { 622f1d8a071SWilliam Breathitt Gray .items = quad8_noise_error_states, 623f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_noise_error_states), 624f1d8a071SWilliam Breathitt Gray .get = quad8_error_noise_get 625f1d8a071SWilliam Breathitt Gray }; 626f1d8a071SWilliam Breathitt Gray 627f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_read(struct counter_device *counter, 628f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 629f1d8a071SWilliam Breathitt Gray { 630e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 631f1d8a071SWilliam Breathitt Gray 632f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->preset[count->id]); 633f1d8a071SWilliam Breathitt Gray } 634f1d8a071SWilliam Breathitt Gray 635e357e81fSWilliam Breathitt Gray static void quad8_preset_register_set(struct quad8 *priv, int id, 636fc069262SSyed Nayyar Waris unsigned int preset) 637fc069262SSyed Nayyar Waris { 638e357e81fSWilliam Breathitt Gray const unsigned int base_offset = priv->base + 2 * id; 639fc069262SSyed Nayyar Waris int i; 640fc069262SSyed Nayyar Waris 641e357e81fSWilliam Breathitt Gray priv->preset[id] = preset; 642fc069262SSyed Nayyar Waris 643fc069262SSyed Nayyar Waris /* Reset Byte Pointer */ 644fc069262SSyed Nayyar Waris outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 645fc069262SSyed Nayyar Waris 646fc069262SSyed Nayyar Waris /* Set Preset Register */ 647fc069262SSyed Nayyar Waris for (i = 0; i < 3; i++) 648fc069262SSyed Nayyar Waris outb(preset >> (8 * i), base_offset); 649fc069262SSyed Nayyar Waris } 650fc069262SSyed Nayyar Waris 651f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_write(struct counter_device *counter, 652f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 653f1d8a071SWilliam Breathitt Gray { 654e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 655f1d8a071SWilliam Breathitt Gray unsigned int preset; 656f1d8a071SWilliam Breathitt Gray int ret; 657f1d8a071SWilliam Breathitt Gray 658f1d8a071SWilliam Breathitt Gray ret = kstrtouint(buf, 0, &preset); 659f1d8a071SWilliam Breathitt Gray if (ret) 660f1d8a071SWilliam Breathitt Gray return ret; 661f1d8a071SWilliam Breathitt Gray 662f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 663f1d8a071SWilliam Breathitt Gray if (preset > 0xFFFFFF) 664f1d8a071SWilliam Breathitt Gray return -EINVAL; 665f1d8a071SWilliam Breathitt Gray 666fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 667f1d8a071SWilliam Breathitt Gray 668fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, preset); 669f1d8a071SWilliam Breathitt Gray 670fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 671f1d8a071SWilliam Breathitt Gray 672f1d8a071SWilliam Breathitt Gray return len; 673f1d8a071SWilliam Breathitt Gray } 674f1d8a071SWilliam Breathitt Gray 675f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_read(struct counter_device *counter, 676f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 677f1d8a071SWilliam Breathitt Gray { 678e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 679fc069262SSyed Nayyar Waris 680fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 681f1d8a071SWilliam Breathitt Gray 682f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 683f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 684f1d8a071SWilliam Breathitt Gray case 1: 685f1d8a071SWilliam Breathitt Gray case 3: 686fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 687fc069262SSyed Nayyar Waris return sprintf(buf, "%u\n", priv->preset[count->id]); 688f1d8a071SWilliam Breathitt Gray } 689f1d8a071SWilliam Breathitt Gray 690fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 691fc069262SSyed Nayyar Waris 692f1d8a071SWilliam Breathitt Gray /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */ 693f1d8a071SWilliam Breathitt Gray return sprintf(buf, "33554431\n"); 694f1d8a071SWilliam Breathitt Gray } 695f1d8a071SWilliam Breathitt Gray 696f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_write(struct counter_device *counter, 697f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 698f1d8a071SWilliam Breathitt Gray { 699e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 700fc069262SSyed Nayyar Waris unsigned int ceiling; 701fc069262SSyed Nayyar Waris int ret; 702fc069262SSyed Nayyar Waris 703fc069262SSyed Nayyar Waris ret = kstrtouint(buf, 0, &ceiling); 704fc069262SSyed Nayyar Waris if (ret) 705fc069262SSyed Nayyar Waris return ret; 706fc069262SSyed Nayyar Waris 707fc069262SSyed Nayyar Waris /* Only 24-bit values are supported */ 708fc069262SSyed Nayyar Waris if (ceiling > 0xFFFFFF) 709fc069262SSyed Nayyar Waris return -EINVAL; 710fc069262SSyed Nayyar Waris 711fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 712f1d8a071SWilliam Breathitt Gray 713f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 714f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 715f1d8a071SWilliam Breathitt Gray case 1: 716f1d8a071SWilliam Breathitt Gray case 3: 717fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, ceiling); 718fc069262SSyed Nayyar Waris break; 719f1d8a071SWilliam Breathitt Gray } 720f1d8a071SWilliam Breathitt Gray 721fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 722fc069262SSyed Nayyar Waris 723f1d8a071SWilliam Breathitt Gray return len; 724f1d8a071SWilliam Breathitt Gray } 725f1d8a071SWilliam Breathitt Gray 726f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_read(struct counter_device *counter, 727f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 728f1d8a071SWilliam Breathitt Gray { 729e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 730f1d8a071SWilliam Breathitt Gray 731f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", !priv->preset_enable[count->id]); 732f1d8a071SWilliam Breathitt Gray } 733f1d8a071SWilliam Breathitt Gray 734f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_write(struct counter_device *counter, 735f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 736f1d8a071SWilliam Breathitt Gray { 737e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 738f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 739f1d8a071SWilliam Breathitt Gray bool preset_enable; 740f1d8a071SWilliam Breathitt Gray int ret; 741f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 742f1d8a071SWilliam Breathitt Gray 743f1d8a071SWilliam Breathitt Gray ret = kstrtobool(buf, &preset_enable); 744f1d8a071SWilliam Breathitt Gray if (ret) 745f1d8a071SWilliam Breathitt Gray return ret; 746f1d8a071SWilliam Breathitt Gray 747f1d8a071SWilliam Breathitt Gray /* Preset enable is active low in Input/Output Control register */ 748f1d8a071SWilliam Breathitt Gray preset_enable = !preset_enable; 749f1d8a071SWilliam Breathitt Gray 750fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 751fc069262SSyed Nayyar Waris 752f1d8a071SWilliam Breathitt Gray priv->preset_enable[count->id] = preset_enable; 753f1d8a071SWilliam Breathitt Gray 754f1d8a071SWilliam Breathitt Gray ior_cfg = priv->ab_enable[count->id] | (unsigned int)preset_enable << 1; 755f1d8a071SWilliam Breathitt Gray 756f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration to Input / Output Control Register */ 757f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 758f1d8a071SWilliam Breathitt Gray 759fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 760fc069262SSyed Nayyar Waris 761f1d8a071SWilliam Breathitt Gray return len; 762f1d8a071SWilliam Breathitt Gray } 763f1d8a071SWilliam Breathitt Gray 764954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter, 765954ab5ccSWilliam Breathitt Gray struct counter_signal *signal, 766954ab5ccSWilliam Breathitt Gray void *private, char *buf) 767954ab5ccSWilliam Breathitt Gray { 768e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 769954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 770708d9893SSyed Nayyar Waris bool disabled; 771954ab5ccSWilliam Breathitt Gray unsigned int status; 772954ab5ccSWilliam Breathitt Gray unsigned int fault; 773954ab5ccSWilliam Breathitt Gray 774708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 775708d9893SSyed Nayyar Waris 776708d9893SSyed Nayyar Waris disabled = !(priv->cable_fault_enable & BIT(channel_id)); 777708d9893SSyed Nayyar Waris 778708d9893SSyed Nayyar Waris if (disabled) { 779708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 780954ab5ccSWilliam Breathitt Gray return -EINVAL; 781708d9893SSyed Nayyar Waris } 782954ab5ccSWilliam Breathitt Gray 783954ab5ccSWilliam Breathitt Gray /* Logic 0 = cable fault */ 784954ab5ccSWilliam Breathitt Gray status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 785954ab5ccSWilliam Breathitt Gray 786708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 787708d9893SSyed Nayyar Waris 788954ab5ccSWilliam Breathitt Gray /* Mask respective channel and invert logic */ 789954ab5ccSWilliam Breathitt Gray fault = !(status & BIT(channel_id)); 790954ab5ccSWilliam Breathitt Gray 791954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", fault); 792954ab5ccSWilliam Breathitt Gray } 793954ab5ccSWilliam Breathitt Gray 794954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_read( 795954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 796954ab5ccSWilliam Breathitt Gray void *private, char *buf) 797954ab5ccSWilliam Breathitt Gray { 798e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 799954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 800954ab5ccSWilliam Breathitt Gray const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id)); 801954ab5ccSWilliam Breathitt Gray 802954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", enb); 803954ab5ccSWilliam Breathitt Gray } 804954ab5ccSWilliam Breathitt Gray 805954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_write( 806954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 807954ab5ccSWilliam Breathitt Gray void *private, const char *buf, size_t len) 808954ab5ccSWilliam Breathitt Gray { 809e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 810954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 811954ab5ccSWilliam Breathitt Gray bool enable; 812954ab5ccSWilliam Breathitt Gray int ret; 813954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 814954ab5ccSWilliam Breathitt Gray 815954ab5ccSWilliam Breathitt Gray ret = kstrtobool(buf, &enable); 816954ab5ccSWilliam Breathitt Gray if (ret) 817954ab5ccSWilliam Breathitt Gray return ret; 818954ab5ccSWilliam Breathitt Gray 819708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 820708d9893SSyed Nayyar Waris 821954ab5ccSWilliam Breathitt Gray if (enable) 822954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable |= BIT(channel_id); 823954ab5ccSWilliam Breathitt Gray else 824954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable &= ~BIT(channel_id); 825954ab5ccSWilliam Breathitt Gray 826954ab5ccSWilliam Breathitt Gray /* Enable is active low in Differential Encoder Cable Status register */ 827954ab5ccSWilliam Breathitt Gray cable_fault_enable = ~priv->cable_fault_enable; 828954ab5ccSWilliam Breathitt Gray 829954ab5ccSWilliam Breathitt Gray outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 830954ab5ccSWilliam Breathitt Gray 831708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 832708d9893SSyed Nayyar Waris 833954ab5ccSWilliam Breathitt Gray return len; 834954ab5ccSWilliam Breathitt Gray } 835954ab5ccSWilliam Breathitt Gray 836de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter, 837de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, char *buf) 838de65d055SWilliam Breathitt Gray { 839e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 840de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 841de65d055SWilliam Breathitt Gray 842de65d055SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]); 843de65d055SWilliam Breathitt Gray } 844de65d055SWilliam Breathitt Gray 845de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter, 846de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, const char *buf, 847de65d055SWilliam Breathitt Gray size_t len) 848de65d055SWilliam Breathitt Gray { 849e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 850de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 851de65d055SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id; 852de65d055SWilliam Breathitt Gray u8 prescaler; 853de65d055SWilliam Breathitt Gray int ret; 854de65d055SWilliam Breathitt Gray 855de65d055SWilliam Breathitt Gray ret = kstrtou8(buf, 0, &prescaler); 856de65d055SWilliam Breathitt Gray if (ret) 857de65d055SWilliam Breathitt Gray return ret; 858de65d055SWilliam Breathitt Gray 859d5ed76adSSyed Nayyar Waris mutex_lock(&priv->lock); 860d5ed76adSSyed Nayyar Waris 861de65d055SWilliam Breathitt Gray priv->fck_prescaler[channel_id] = prescaler; 862de65d055SWilliam Breathitt Gray 863de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 864de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 865de65d055SWilliam Breathitt Gray 866de65d055SWilliam Breathitt Gray /* Set filter clock factor */ 867de65d055SWilliam Breathitt Gray outb(prescaler, base_offset); 868de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 869de65d055SWilliam Breathitt Gray base_offset + 1); 870de65d055SWilliam Breathitt Gray 871d5ed76adSSyed Nayyar Waris mutex_unlock(&priv->lock); 872d5ed76adSSyed Nayyar Waris 873de65d055SWilliam Breathitt Gray return len; 874de65d055SWilliam Breathitt Gray } 875de65d055SWilliam Breathitt Gray 876de65d055SWilliam Breathitt Gray static const struct counter_signal_ext quad8_signal_ext[] = { 877de65d055SWilliam Breathitt Gray { 878954ab5ccSWilliam Breathitt Gray .name = "cable_fault", 879954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_read 880954ab5ccSWilliam Breathitt Gray }, 881954ab5ccSWilliam Breathitt Gray { 882954ab5ccSWilliam Breathitt Gray .name = "cable_fault_enable", 883954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_enable_read, 884954ab5ccSWilliam Breathitt Gray .write = quad8_signal_cable_fault_enable_write 885954ab5ccSWilliam Breathitt Gray }, 886954ab5ccSWilliam Breathitt Gray { 887de65d055SWilliam Breathitt Gray .name = "filter_clock_prescaler", 888de65d055SWilliam Breathitt Gray .read = quad8_signal_fck_prescaler_read, 889de65d055SWilliam Breathitt Gray .write = quad8_signal_fck_prescaler_write 890de65d055SWilliam Breathitt Gray } 891de65d055SWilliam Breathitt Gray }; 892de65d055SWilliam Breathitt Gray 893f1d8a071SWilliam Breathitt Gray static const struct counter_signal_ext quad8_index_ext[] = { 894f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("index_polarity", &quad8_index_pol_enum), 895f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("index_polarity", &quad8_index_pol_enum), 896f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("synchronous_mode", &quad8_syn_mode_enum), 897f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("synchronous_mode", &quad8_syn_mode_enum) 898f1d8a071SWilliam Breathitt Gray }; 899f1d8a071SWilliam Breathitt Gray 900f1d8a071SWilliam Breathitt Gray #define QUAD8_QUAD_SIGNAL(_id, _name) { \ 901f1d8a071SWilliam Breathitt Gray .id = (_id), \ 902de65d055SWilliam Breathitt Gray .name = (_name), \ 903de65d055SWilliam Breathitt Gray .ext = quad8_signal_ext, \ 904de65d055SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_signal_ext) \ 905f1d8a071SWilliam Breathitt Gray } 906f1d8a071SWilliam Breathitt Gray 907f1d8a071SWilliam Breathitt Gray #define QUAD8_INDEX_SIGNAL(_id, _name) { \ 908f1d8a071SWilliam Breathitt Gray .id = (_id), \ 909f1d8a071SWilliam Breathitt Gray .name = (_name), \ 910f1d8a071SWilliam Breathitt Gray .ext = quad8_index_ext, \ 911f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_index_ext) \ 912f1d8a071SWilliam Breathitt Gray } 913f1d8a071SWilliam Breathitt Gray 914f1d8a071SWilliam Breathitt Gray static struct counter_signal quad8_signals[] = { 915f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(0, "Channel 1 Quadrature A"), 916f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(1, "Channel 1 Quadrature B"), 917f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(2, "Channel 2 Quadrature A"), 918f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(3, "Channel 2 Quadrature B"), 919f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(4, "Channel 3 Quadrature A"), 920f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(5, "Channel 3 Quadrature B"), 921f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(6, "Channel 4 Quadrature A"), 922f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(7, "Channel 4 Quadrature B"), 923f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(8, "Channel 5 Quadrature A"), 924f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(9, "Channel 5 Quadrature B"), 925f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(10, "Channel 6 Quadrature A"), 926f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(11, "Channel 6 Quadrature B"), 927f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(12, "Channel 7 Quadrature A"), 928f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(13, "Channel 7 Quadrature B"), 929f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(14, "Channel 8 Quadrature A"), 930f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(15, "Channel 8 Quadrature B"), 931f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(16, "Channel 1 Index"), 932f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(17, "Channel 2 Index"), 933f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(18, "Channel 3 Index"), 934f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(19, "Channel 4 Index"), 935f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(20, "Channel 5 Index"), 936f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(21, "Channel 6 Index"), 937f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(22, "Channel 7 Index"), 938f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(23, "Channel 8 Index") 939f1d8a071SWilliam Breathitt Gray }; 940f1d8a071SWilliam Breathitt Gray 941f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT_SYNAPSES(_id) { \ 942f1d8a071SWilliam Breathitt Gray { \ 943f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 944f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 945f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) \ 946f1d8a071SWilliam Breathitt Gray }, \ 947f1d8a071SWilliam Breathitt Gray { \ 948f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 949f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 950f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 1 \ 951f1d8a071SWilliam Breathitt Gray }, \ 952f1d8a071SWilliam Breathitt Gray { \ 953f1d8a071SWilliam Breathitt Gray .actions_list = quad8_index_actions_list, \ 954f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_index_actions_list), \ 955f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 16 \ 956f1d8a071SWilliam Breathitt Gray } \ 957f1d8a071SWilliam Breathitt Gray } 958f1d8a071SWilliam Breathitt Gray 959f1d8a071SWilliam Breathitt Gray static struct counter_synapse quad8_count_synapses[][3] = { 960f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(0), QUAD8_COUNT_SYNAPSES(1), 961f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(2), QUAD8_COUNT_SYNAPSES(3), 962f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(4), QUAD8_COUNT_SYNAPSES(5), 963f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7) 964f1d8a071SWilliam Breathitt Gray }; 965f1d8a071SWilliam Breathitt Gray 966f1d8a071SWilliam Breathitt Gray static const struct counter_count_ext quad8_count_ext[] = { 967f1d8a071SWilliam Breathitt Gray { 968f1d8a071SWilliam Breathitt Gray .name = "ceiling", 969f1d8a071SWilliam Breathitt Gray .read = quad8_count_ceiling_read, 970f1d8a071SWilliam Breathitt Gray .write = quad8_count_ceiling_write 971f1d8a071SWilliam Breathitt Gray }, 972f1d8a071SWilliam Breathitt Gray { 973f1d8a071SWilliam Breathitt Gray .name = "floor", 974f1d8a071SWilliam Breathitt Gray .read = quad8_count_floor_read 975f1d8a071SWilliam Breathitt Gray }, 976f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("count_mode", &quad8_cnt_mode_enum), 977f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("count_mode", &quad8_cnt_mode_enum), 978f1d8a071SWilliam Breathitt Gray { 979f1d8a071SWilliam Breathitt Gray .name = "direction", 980f1d8a071SWilliam Breathitt Gray .read = quad8_count_direction_read 981f1d8a071SWilliam Breathitt Gray }, 982f1d8a071SWilliam Breathitt Gray { 983f1d8a071SWilliam Breathitt Gray .name = "enable", 984f1d8a071SWilliam Breathitt Gray .read = quad8_count_enable_read, 985f1d8a071SWilliam Breathitt Gray .write = quad8_count_enable_write 986f1d8a071SWilliam Breathitt Gray }, 987f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("error_noise", &quad8_error_noise_enum), 988f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("error_noise", &quad8_error_noise_enum), 989f1d8a071SWilliam Breathitt Gray { 990f1d8a071SWilliam Breathitt Gray .name = "preset", 991f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_read, 992f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_write 993f1d8a071SWilliam Breathitt Gray }, 994f1d8a071SWilliam Breathitt Gray { 995f1d8a071SWilliam Breathitt Gray .name = "preset_enable", 996f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_enable_read, 997f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_enable_write 998f1d8a071SWilliam Breathitt Gray } 999f1d8a071SWilliam Breathitt Gray }; 1000f1d8a071SWilliam Breathitt Gray 1001f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT(_id, _cntname) { \ 1002f1d8a071SWilliam Breathitt Gray .id = (_id), \ 1003f1d8a071SWilliam Breathitt Gray .name = (_cntname), \ 1004f1d8a071SWilliam Breathitt Gray .functions_list = quad8_count_functions_list, \ 1005f1d8a071SWilliam Breathitt Gray .num_functions = ARRAY_SIZE(quad8_count_functions_list), \ 1006f1d8a071SWilliam Breathitt Gray .synapses = quad8_count_synapses[(_id)], \ 1007f1d8a071SWilliam Breathitt Gray .num_synapses = 2, \ 1008f1d8a071SWilliam Breathitt Gray .ext = quad8_count_ext, \ 1009f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_count_ext) \ 1010f1d8a071SWilliam Breathitt Gray } 1011f1d8a071SWilliam Breathitt Gray 1012f1d8a071SWilliam Breathitt Gray static struct counter_count quad8_counts[] = { 1013f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(0, "Channel 1 Count"), 1014f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(1, "Channel 2 Count"), 1015f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(2, "Channel 3 Count"), 1016f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(3, "Channel 4 Count"), 1017f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(4, "Channel 5 Count"), 1018f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(5, "Channel 6 Count"), 1019f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(6, "Channel 7 Count"), 1020f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(7, "Channel 8 Count") 1021f1d8a071SWilliam Breathitt Gray }; 1022f1d8a071SWilliam Breathitt Gray 1023f1d8a071SWilliam Breathitt Gray static int quad8_probe(struct device *dev, unsigned int id) 1024f1d8a071SWilliam Breathitt Gray { 1025e357e81fSWilliam Breathitt Gray struct quad8 *priv; 1026f1d8a071SWilliam Breathitt Gray int i, j; 1027f1d8a071SWilliam Breathitt Gray unsigned int base_offset; 1028f1d8a071SWilliam Breathitt Gray 1029f1d8a071SWilliam Breathitt Gray if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) { 1030f1d8a071SWilliam Breathitt Gray dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", 1031f1d8a071SWilliam Breathitt Gray base[id], base[id] + QUAD8_EXTENT); 1032f1d8a071SWilliam Breathitt Gray return -EBUSY; 1033f1d8a071SWilliam Breathitt Gray } 1034f1d8a071SWilliam Breathitt Gray 1035e357e81fSWilliam Breathitt Gray priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1036e357e81fSWilliam Breathitt Gray if (!priv) 1037f1d8a071SWilliam Breathitt Gray return -ENOMEM; 1038f1d8a071SWilliam Breathitt Gray 1039f1d8a071SWilliam Breathitt Gray /* Initialize Counter device and driver data */ 1040e357e81fSWilliam Breathitt Gray priv->counter.name = dev_name(dev); 1041e357e81fSWilliam Breathitt Gray priv->counter.parent = dev; 1042e357e81fSWilliam Breathitt Gray priv->counter.ops = &quad8_ops; 1043e357e81fSWilliam Breathitt Gray priv->counter.counts = quad8_counts; 1044e357e81fSWilliam Breathitt Gray priv->counter.num_counts = ARRAY_SIZE(quad8_counts); 1045e357e81fSWilliam Breathitt Gray priv->counter.signals = quad8_signals; 1046e357e81fSWilliam Breathitt Gray priv->counter.num_signals = ARRAY_SIZE(quad8_signals); 1047e357e81fSWilliam Breathitt Gray priv->counter.priv = priv; 1048e357e81fSWilliam Breathitt Gray priv->base = base[id]; 1049f1d8a071SWilliam Breathitt Gray 1050fc069262SSyed Nayyar Waris /* Initialize mutex */ 1051e357e81fSWilliam Breathitt Gray mutex_init(&priv->lock); 1052fc069262SSyed Nayyar Waris 1053f1d8a071SWilliam Breathitt Gray /* Reset all counters and disable interrupt function */ 1054f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1055f1d8a071SWilliam Breathitt Gray /* Set initial configuration for all counters */ 1056f1d8a071SWilliam Breathitt Gray for (i = 0; i < QUAD8_NUM_COUNTERS; i++) { 1057f1d8a071SWilliam Breathitt Gray base_offset = base[id] + 2 * i; 1058f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 1059f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1060de65d055SWilliam Breathitt Gray /* Reset filter clock factor */ 1061de65d055SWilliam Breathitt Gray outb(0, base_offset); 1062de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 1063de65d055SWilliam Breathitt Gray base_offset + 1); 1064de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 1065de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1066f1d8a071SWilliam Breathitt Gray /* Reset Preset Register */ 1067f1d8a071SWilliam Breathitt Gray for (j = 0; j < 3; j++) 1068f1d8a071SWilliam Breathitt Gray outb(0x00, base_offset); 1069f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 1070f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 1071f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 1072f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 1073f1d8a071SWilliam Breathitt Gray /* Binary encoding; Normal count; non-quadrature mode */ 1074f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR, base_offset + 1); 1075f1d8a071SWilliam Breathitt Gray /* Disable A and B inputs; preset on index; FLG1 as Carry */ 1076f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR, base_offset + 1); 1077f1d8a071SWilliam Breathitt Gray /* Disable index function; negative index polarity */ 1078f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR, base_offset + 1); 1079f1d8a071SWilliam Breathitt Gray } 1080954ab5ccSWilliam Breathitt Gray /* Disable Differential Encoder Cable Status for all channels */ 1081954ab5ccSWilliam Breathitt Gray outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS); 1082f1d8a071SWilliam Breathitt Gray /* Enable all counters */ 1083f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1084f1d8a071SWilliam Breathitt Gray 1085e357e81fSWilliam Breathitt Gray return devm_counter_register(dev, &priv->counter); 1086f1d8a071SWilliam Breathitt Gray } 1087f1d8a071SWilliam Breathitt Gray 1088f1d8a071SWilliam Breathitt Gray static struct isa_driver quad8_driver = { 1089f1d8a071SWilliam Breathitt Gray .probe = quad8_probe, 1090f1d8a071SWilliam Breathitt Gray .driver = { 1091f1d8a071SWilliam Breathitt Gray .name = "104-quad-8" 1092f1d8a071SWilliam Breathitt Gray } 1093f1d8a071SWilliam Breathitt Gray }; 1094f1d8a071SWilliam Breathitt Gray 1095f1d8a071SWilliam Breathitt Gray module_isa_driver(quad8_driver, num_quad8); 1096f1d8a071SWilliam Breathitt Gray 1097f1d8a071SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); 1098e357e81fSWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver"); 1099f1d8a071SWilliam Breathitt Gray MODULE_LICENSE("GPL v2"); 1100