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, 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 196fca2534fSWilliam Breathitt Gray static const 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; 276*b11eed15SWilliam Breathitt Gray default: 277*b11eed15SWilliam Breathitt Gray /* should never reach this path */ 278*b11eed15SWilliam Breathitt Gray mutex_unlock(&priv->lock); 279*b11eed15SWilliam Breathitt Gray return -EINVAL; 280f1d8a071SWilliam Breathitt Gray } 281f1d8a071SWilliam Breathitt Gray } 282f1d8a071SWilliam Breathitt Gray 283f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 284f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 285f1d8a071SWilliam Breathitt Gray 286fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 287fc069262SSyed Nayyar Waris 288f1d8a071SWilliam Breathitt Gray return 0; 289f1d8a071SWilliam Breathitt Gray } 290f1d8a071SWilliam Breathitt Gray 291f1d8a071SWilliam Breathitt Gray static void quad8_direction_get(struct counter_device *counter, 292f1d8a071SWilliam Breathitt Gray struct counter_count *count, enum counter_count_direction *direction) 293f1d8a071SWilliam Breathitt Gray { 294e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 295f1d8a071SWilliam Breathitt Gray unsigned int ud_flag; 296f1d8a071SWilliam Breathitt Gray const unsigned int flag_addr = priv->base + 2 * count->id + 1; 297f1d8a071SWilliam Breathitt Gray 298f1d8a071SWilliam Breathitt Gray /* U/D flag: nonzero = up, zero = down */ 299f1d8a071SWilliam Breathitt Gray ud_flag = inb(flag_addr) & QUAD8_FLAG_UD; 300f1d8a071SWilliam Breathitt Gray 301f1d8a071SWilliam Breathitt Gray *direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD : 302f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_DIRECTION_BACKWARD; 303f1d8a071SWilliam Breathitt Gray } 304f1d8a071SWilliam Breathitt Gray 305f1d8a071SWilliam Breathitt Gray enum quad8_synapse_action { 306f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_NONE = 0, 307f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_RISING_EDGE, 308f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_FALLING_EDGE, 309f1d8a071SWilliam Breathitt Gray QUAD8_SYNAPSE_ACTION_BOTH_EDGES 310f1d8a071SWilliam Breathitt Gray }; 311f1d8a071SWilliam Breathitt Gray 3126a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_index_actions_list[] = { 313f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, 314f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE 315f1d8a071SWilliam Breathitt Gray }; 316f1d8a071SWilliam Breathitt Gray 3176a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_synapse_actions_list[] = { 318f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE, 319f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE, 320f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 321f1d8a071SWilliam Breathitt Gray [QUAD8_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES 322f1d8a071SWilliam Breathitt Gray }; 323f1d8a071SWilliam Breathitt Gray 324f1d8a071SWilliam Breathitt Gray static int quad8_action_get(struct counter_device *counter, 325f1d8a071SWilliam Breathitt Gray struct counter_count *count, struct counter_synapse *synapse, 326f1d8a071SWilliam Breathitt Gray size_t *action) 327f1d8a071SWilliam Breathitt Gray { 328e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 329f1d8a071SWilliam Breathitt Gray int err; 330f1d8a071SWilliam Breathitt Gray size_t function = 0; 331f1d8a071SWilliam Breathitt Gray const size_t signal_a_id = count->synapses[0].signal->id; 332f1d8a071SWilliam Breathitt Gray enum counter_count_direction direction; 333f1d8a071SWilliam Breathitt Gray 334f1d8a071SWilliam Breathitt Gray /* Handle Index signals */ 335f1d8a071SWilliam Breathitt Gray if (synapse->signal->id >= 16) { 336f1d8a071SWilliam Breathitt Gray if (priv->preset_enable[count->id]) 337f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 338f1d8a071SWilliam Breathitt Gray else 339f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 340f1d8a071SWilliam Breathitt Gray 341f1d8a071SWilliam Breathitt Gray return 0; 342f1d8a071SWilliam Breathitt Gray } 343f1d8a071SWilliam Breathitt Gray 344f1d8a071SWilliam Breathitt Gray err = quad8_function_get(counter, count, &function); 345f1d8a071SWilliam Breathitt Gray if (err) 346f1d8a071SWilliam Breathitt Gray return err; 347f1d8a071SWilliam Breathitt Gray 348f1d8a071SWilliam Breathitt Gray /* Default action mode */ 349f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_NONE; 350f1d8a071SWilliam Breathitt Gray 351f1d8a071SWilliam Breathitt Gray /* Determine action mode based on current count function mode */ 352f1d8a071SWilliam Breathitt Gray switch (function) { 353f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_PULSE_DIRECTION: 354f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 355f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 356*b11eed15SWilliam Breathitt Gray return 0; 357f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X1: 358f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) { 359f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &direction); 360f1d8a071SWilliam Breathitt Gray 361f1d8a071SWilliam Breathitt Gray if (direction == COUNTER_COUNT_DIRECTION_FORWARD) 362f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE; 363f1d8a071SWilliam Breathitt Gray else 364f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_FALLING_EDGE; 365f1d8a071SWilliam Breathitt Gray } 366*b11eed15SWilliam Breathitt Gray return 0; 367f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X2: 368f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 369f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 370*b11eed15SWilliam Breathitt Gray return 0; 371f1d8a071SWilliam Breathitt Gray case QUAD8_COUNT_FUNCTION_QUADRATURE_X4: 372f1d8a071SWilliam Breathitt Gray *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES; 373f1d8a071SWilliam Breathitt Gray return 0; 374*b11eed15SWilliam Breathitt Gray default: 375*b11eed15SWilliam Breathitt Gray /* should never reach this path */ 376*b11eed15SWilliam Breathitt Gray return -EINVAL; 377*b11eed15SWilliam Breathitt Gray } 378f1d8a071SWilliam Breathitt Gray } 379f1d8a071SWilliam Breathitt Gray 38017aa207eSYueHaibing static const struct counter_ops quad8_ops = { 381f1d8a071SWilliam Breathitt Gray .signal_read = quad8_signal_read, 382f1d8a071SWilliam Breathitt Gray .count_read = quad8_count_read, 383f1d8a071SWilliam Breathitt Gray .count_write = quad8_count_write, 384f1d8a071SWilliam Breathitt Gray .function_get = quad8_function_get, 385f1d8a071SWilliam Breathitt Gray .function_set = quad8_function_set, 386f1d8a071SWilliam Breathitt Gray .action_get = quad8_action_get 387f1d8a071SWilliam Breathitt Gray }; 388f1d8a071SWilliam Breathitt Gray 389e357e81fSWilliam Breathitt Gray static const char *const quad8_index_polarity_modes[] = { 390e357e81fSWilliam Breathitt Gray "negative", 391e357e81fSWilliam Breathitt Gray "positive" 392e357e81fSWilliam Breathitt Gray }; 393e357e81fSWilliam Breathitt Gray 394f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_get(struct counter_device *counter, 395f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *index_polarity) 396f1d8a071SWilliam Breathitt Gray { 397e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 398f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 399f1d8a071SWilliam Breathitt Gray 400f1d8a071SWilliam Breathitt Gray *index_polarity = priv->index_polarity[channel_id]; 401f1d8a071SWilliam Breathitt Gray 402f1d8a071SWilliam Breathitt Gray return 0; 403f1d8a071SWilliam Breathitt Gray } 404f1d8a071SWilliam Breathitt Gray 405f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_set(struct counter_device *counter, 406f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t index_polarity) 407f1d8a071SWilliam Breathitt Gray { 408e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 409f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 410f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 411fc069262SSyed Nayyar Waris unsigned int idr_cfg = index_polarity << 1; 412fc069262SSyed Nayyar Waris 413fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 414fc069262SSyed Nayyar Waris 415fc069262SSyed Nayyar Waris idr_cfg |= priv->synchronous_mode[channel_id]; 416f1d8a071SWilliam Breathitt Gray 417f1d8a071SWilliam Breathitt Gray priv->index_polarity[channel_id] = index_polarity; 418f1d8a071SWilliam Breathitt Gray 419f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 420f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 421f1d8a071SWilliam Breathitt Gray 422fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 423fc069262SSyed Nayyar Waris 424f1d8a071SWilliam Breathitt Gray return 0; 425f1d8a071SWilliam Breathitt Gray } 426f1d8a071SWilliam Breathitt Gray 427f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_index_pol_enum = { 428f1d8a071SWilliam Breathitt Gray .items = quad8_index_polarity_modes, 429f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_index_polarity_modes), 430f1d8a071SWilliam Breathitt Gray .get = quad8_index_polarity_get, 431f1d8a071SWilliam Breathitt Gray .set = quad8_index_polarity_set 432f1d8a071SWilliam Breathitt Gray }; 433f1d8a071SWilliam Breathitt Gray 434e357e81fSWilliam Breathitt Gray static const char *const quad8_synchronous_modes[] = { 435e357e81fSWilliam Breathitt Gray "non-synchronous", 436e357e81fSWilliam Breathitt Gray "synchronous" 437e357e81fSWilliam Breathitt Gray }; 438e357e81fSWilliam Breathitt Gray 439f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_get(struct counter_device *counter, 440f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t *synchronous_mode) 441f1d8a071SWilliam Breathitt Gray { 442e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 443f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 444f1d8a071SWilliam Breathitt Gray 445f1d8a071SWilliam Breathitt Gray *synchronous_mode = priv->synchronous_mode[channel_id]; 446f1d8a071SWilliam Breathitt Gray 447f1d8a071SWilliam Breathitt Gray return 0; 448f1d8a071SWilliam Breathitt Gray } 449f1d8a071SWilliam Breathitt Gray 450f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_set(struct counter_device *counter, 451f1d8a071SWilliam Breathitt Gray struct counter_signal *signal, size_t synchronous_mode) 452f1d8a071SWilliam Breathitt Gray { 453e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 454f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 455f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 456fc069262SSyed Nayyar Waris unsigned int idr_cfg = synchronous_mode; 457fc069262SSyed Nayyar Waris 458fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 459fc069262SSyed Nayyar Waris 460fc069262SSyed Nayyar Waris idr_cfg |= priv->index_polarity[channel_id] << 1; 461f1d8a071SWilliam Breathitt Gray 462f1d8a071SWilliam Breathitt Gray /* Index function must be non-synchronous in non-quadrature mode */ 463fc069262SSyed Nayyar Waris if (synchronous_mode && !priv->quadrature_mode[channel_id]) { 464fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 465f1d8a071SWilliam Breathitt Gray return -EINVAL; 466fc069262SSyed Nayyar Waris } 467f1d8a071SWilliam Breathitt Gray 468f1d8a071SWilliam Breathitt Gray priv->synchronous_mode[channel_id] = synchronous_mode; 469f1d8a071SWilliam Breathitt Gray 470f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 471f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 472f1d8a071SWilliam Breathitt Gray 473fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 474fc069262SSyed Nayyar Waris 475f1d8a071SWilliam Breathitt Gray return 0; 476f1d8a071SWilliam Breathitt Gray } 477f1d8a071SWilliam Breathitt Gray 478f1d8a071SWilliam Breathitt Gray static struct counter_signal_enum_ext quad8_syn_mode_enum = { 479f1d8a071SWilliam Breathitt Gray .items = quad8_synchronous_modes, 480f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_synchronous_modes), 481f1d8a071SWilliam Breathitt Gray .get = quad8_synchronous_mode_get, 482f1d8a071SWilliam Breathitt Gray .set = quad8_synchronous_mode_set 483f1d8a071SWilliam Breathitt Gray }; 484f1d8a071SWilliam Breathitt Gray 485f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_floor_read(struct counter_device *counter, 486f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 487f1d8a071SWilliam Breathitt Gray { 488f1d8a071SWilliam Breathitt Gray /* Only a floor of 0 is supported */ 489f1d8a071SWilliam Breathitt Gray return sprintf(buf, "0\n"); 490f1d8a071SWilliam Breathitt Gray } 491f1d8a071SWilliam Breathitt Gray 492f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_get(struct counter_device *counter, 493f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *cnt_mode) 494f1d8a071SWilliam Breathitt Gray { 495e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 496f1d8a071SWilliam Breathitt Gray 497f1d8a071SWilliam Breathitt Gray /* Map 104-QUAD-8 count mode to Generic Counter count mode */ 498f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 499f1d8a071SWilliam Breathitt Gray case 0: 500f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NORMAL; 501f1d8a071SWilliam Breathitt Gray break; 502f1d8a071SWilliam Breathitt Gray case 1: 503f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_RANGE_LIMIT; 504f1d8a071SWilliam Breathitt Gray break; 505f1d8a071SWilliam Breathitt Gray case 2: 506f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NON_RECYCLE; 507f1d8a071SWilliam Breathitt Gray break; 508f1d8a071SWilliam Breathitt Gray case 3: 509f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_MODULO_N; 510f1d8a071SWilliam Breathitt Gray break; 511f1d8a071SWilliam Breathitt Gray } 512f1d8a071SWilliam Breathitt Gray 513f1d8a071SWilliam Breathitt Gray return 0; 514f1d8a071SWilliam Breathitt Gray } 515f1d8a071SWilliam Breathitt Gray 516f1d8a071SWilliam Breathitt Gray static int quad8_count_mode_set(struct counter_device *counter, 517f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t cnt_mode) 518f1d8a071SWilliam Breathitt Gray { 519e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 520f1d8a071SWilliam Breathitt Gray unsigned int mode_cfg; 521f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 522f1d8a071SWilliam Breathitt Gray 523f1d8a071SWilliam Breathitt Gray /* Map Generic Counter count mode to 104-QUAD-8 count mode */ 524f1d8a071SWilliam Breathitt Gray switch (cnt_mode) { 525f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NORMAL: 526f1d8a071SWilliam Breathitt Gray cnt_mode = 0; 527f1d8a071SWilliam Breathitt Gray break; 528f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_RANGE_LIMIT: 529f1d8a071SWilliam Breathitt Gray cnt_mode = 1; 530f1d8a071SWilliam Breathitt Gray break; 531f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NON_RECYCLE: 532f1d8a071SWilliam Breathitt Gray cnt_mode = 2; 533f1d8a071SWilliam Breathitt Gray break; 534f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_MODULO_N: 535f1d8a071SWilliam Breathitt Gray cnt_mode = 3; 536f1d8a071SWilliam Breathitt Gray break; 537*b11eed15SWilliam Breathitt Gray default: 538*b11eed15SWilliam Breathitt Gray /* should never reach this path */ 539*b11eed15SWilliam Breathitt Gray return -EINVAL; 540f1d8a071SWilliam Breathitt Gray } 541f1d8a071SWilliam Breathitt Gray 542fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 543fc069262SSyed Nayyar Waris 544f1d8a071SWilliam Breathitt Gray priv->count_mode[count->id] = cnt_mode; 545f1d8a071SWilliam Breathitt Gray 546f1d8a071SWilliam Breathitt Gray /* Set count mode configuration value */ 547f1d8a071SWilliam Breathitt Gray mode_cfg = cnt_mode << 1; 548f1d8a071SWilliam Breathitt Gray 549f1d8a071SWilliam Breathitt Gray /* Add quadrature mode configuration */ 550f1d8a071SWilliam Breathitt Gray if (priv->quadrature_mode[count->id]) 551f1d8a071SWilliam Breathitt Gray mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3; 552f1d8a071SWilliam Breathitt Gray 553f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 554f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 555f1d8a071SWilliam Breathitt Gray 556fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 557fc069262SSyed Nayyar Waris 558f1d8a071SWilliam Breathitt Gray return 0; 559f1d8a071SWilliam Breathitt Gray } 560f1d8a071SWilliam Breathitt Gray 561f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_cnt_mode_enum = { 562f1d8a071SWilliam Breathitt Gray .items = counter_count_mode_str, 563f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(counter_count_mode_str), 564f1d8a071SWilliam Breathitt Gray .get = quad8_count_mode_get, 565f1d8a071SWilliam Breathitt Gray .set = quad8_count_mode_set 566f1d8a071SWilliam Breathitt Gray }; 567f1d8a071SWilliam Breathitt Gray 568f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_direction_read(struct counter_device *counter, 569f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *priv, char *buf) 570f1d8a071SWilliam Breathitt Gray { 571f1d8a071SWilliam Breathitt Gray enum counter_count_direction dir; 572f1d8a071SWilliam Breathitt Gray 573f1d8a071SWilliam Breathitt Gray quad8_direction_get(counter, count, &dir); 574f1d8a071SWilliam Breathitt Gray 575f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%s\n", counter_count_direction_str[dir]); 576f1d8a071SWilliam Breathitt Gray } 577f1d8a071SWilliam Breathitt Gray 578f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_read(struct counter_device *counter, 579f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 580f1d8a071SWilliam Breathitt Gray { 581e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 582f1d8a071SWilliam Breathitt Gray 583f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->ab_enable[count->id]); 584f1d8a071SWilliam Breathitt Gray } 585f1d8a071SWilliam Breathitt Gray 586f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_enable_write(struct counter_device *counter, 587f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 588f1d8a071SWilliam Breathitt Gray { 589e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 590f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 591f1d8a071SWilliam Breathitt Gray int err; 592f1d8a071SWilliam Breathitt Gray bool ab_enable; 593f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 594f1d8a071SWilliam Breathitt Gray 595f1d8a071SWilliam Breathitt Gray err = kstrtobool(buf, &ab_enable); 596f1d8a071SWilliam Breathitt Gray if (err) 597f1d8a071SWilliam Breathitt Gray return err; 598f1d8a071SWilliam Breathitt Gray 599fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 600fc069262SSyed Nayyar Waris 601f1d8a071SWilliam Breathitt Gray priv->ab_enable[count->id] = ab_enable; 602f1d8a071SWilliam Breathitt Gray 603f1d8a071SWilliam Breathitt Gray ior_cfg = ab_enable | priv->preset_enable[count->id] << 1; 604f1d8a071SWilliam Breathitt Gray 605f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration */ 606f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1); 607f1d8a071SWilliam Breathitt Gray 608fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 609fc069262SSyed Nayyar Waris 610f1d8a071SWilliam Breathitt Gray return len; 611f1d8a071SWilliam Breathitt Gray } 612f1d8a071SWilliam Breathitt Gray 613e357e81fSWilliam Breathitt Gray static const char *const quad8_noise_error_states[] = { 614e357e81fSWilliam Breathitt Gray "No excessive noise is present at the count inputs", 615e357e81fSWilliam Breathitt Gray "Excessive noise is present at the count inputs" 616e357e81fSWilliam Breathitt Gray }; 617e357e81fSWilliam Breathitt Gray 618f1d8a071SWilliam Breathitt Gray static int quad8_error_noise_get(struct counter_device *counter, 619f1d8a071SWilliam Breathitt Gray struct counter_count *count, size_t *noise_error) 620f1d8a071SWilliam Breathitt Gray { 621e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 622f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 623f1d8a071SWilliam Breathitt Gray 624f1d8a071SWilliam Breathitt Gray *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E); 625f1d8a071SWilliam Breathitt Gray 626f1d8a071SWilliam Breathitt Gray return 0; 627f1d8a071SWilliam Breathitt Gray } 628f1d8a071SWilliam Breathitt Gray 629f1d8a071SWilliam Breathitt Gray static struct counter_count_enum_ext quad8_error_noise_enum = { 630f1d8a071SWilliam Breathitt Gray .items = quad8_noise_error_states, 631f1d8a071SWilliam Breathitt Gray .num_items = ARRAY_SIZE(quad8_noise_error_states), 632f1d8a071SWilliam Breathitt Gray .get = quad8_error_noise_get 633f1d8a071SWilliam Breathitt Gray }; 634f1d8a071SWilliam Breathitt Gray 635f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_read(struct counter_device *counter, 636f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 637f1d8a071SWilliam Breathitt Gray { 638e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 639f1d8a071SWilliam Breathitt Gray 640f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->preset[count->id]); 641f1d8a071SWilliam Breathitt Gray } 642f1d8a071SWilliam Breathitt Gray 643e612b600SWilliam Breathitt Gray static void quad8_preset_register_set(struct quad8 *const priv, const int id, 644e612b600SWilliam Breathitt Gray const unsigned int preset) 645fc069262SSyed Nayyar Waris { 646e357e81fSWilliam Breathitt Gray const unsigned int base_offset = priv->base + 2 * id; 647fc069262SSyed Nayyar Waris int i; 648fc069262SSyed Nayyar Waris 649e357e81fSWilliam Breathitt Gray priv->preset[id] = preset; 650fc069262SSyed Nayyar Waris 651fc069262SSyed Nayyar Waris /* Reset Byte Pointer */ 652fc069262SSyed Nayyar Waris outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 653fc069262SSyed Nayyar Waris 654fc069262SSyed Nayyar Waris /* Set Preset Register */ 655fc069262SSyed Nayyar Waris for (i = 0; i < 3; i++) 656fc069262SSyed Nayyar Waris outb(preset >> (8 * i), base_offset); 657fc069262SSyed Nayyar Waris } 658fc069262SSyed Nayyar Waris 659f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_write(struct counter_device *counter, 660f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 661f1d8a071SWilliam Breathitt Gray { 662e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 663f1d8a071SWilliam Breathitt Gray unsigned int preset; 664f1d8a071SWilliam Breathitt Gray int ret; 665f1d8a071SWilliam Breathitt Gray 666f1d8a071SWilliam Breathitt Gray ret = kstrtouint(buf, 0, &preset); 667f1d8a071SWilliam Breathitt Gray if (ret) 668f1d8a071SWilliam Breathitt Gray return ret; 669f1d8a071SWilliam Breathitt Gray 670f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 671f1d8a071SWilliam Breathitt Gray if (preset > 0xFFFFFF) 672f1d8a071SWilliam Breathitt Gray return -EINVAL; 673f1d8a071SWilliam Breathitt Gray 674fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 675f1d8a071SWilliam Breathitt Gray 676fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, preset); 677f1d8a071SWilliam Breathitt Gray 678fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 679f1d8a071SWilliam Breathitt Gray 680f1d8a071SWilliam Breathitt Gray return len; 681f1d8a071SWilliam Breathitt Gray } 682f1d8a071SWilliam Breathitt Gray 683f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_read(struct counter_device *counter, 684f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 685f1d8a071SWilliam Breathitt Gray { 686e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 687fc069262SSyed Nayyar Waris 688fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 689f1d8a071SWilliam Breathitt Gray 690f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 691f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 692f1d8a071SWilliam Breathitt Gray case 1: 693f1d8a071SWilliam Breathitt Gray case 3: 694fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 695fc069262SSyed Nayyar Waris return sprintf(buf, "%u\n", priv->preset[count->id]); 696f1d8a071SWilliam Breathitt Gray } 697f1d8a071SWilliam Breathitt Gray 698fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 699fc069262SSyed Nayyar Waris 700f1d8a071SWilliam Breathitt Gray /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */ 701f1d8a071SWilliam Breathitt Gray return sprintf(buf, "33554431\n"); 702f1d8a071SWilliam Breathitt Gray } 703f1d8a071SWilliam Breathitt Gray 704f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_ceiling_write(struct counter_device *counter, 705f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 706f1d8a071SWilliam Breathitt Gray { 707e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 708fc069262SSyed Nayyar Waris unsigned int ceiling; 709fc069262SSyed Nayyar Waris int ret; 710fc069262SSyed Nayyar Waris 711fc069262SSyed Nayyar Waris ret = kstrtouint(buf, 0, &ceiling); 712fc069262SSyed Nayyar Waris if (ret) 713fc069262SSyed Nayyar Waris return ret; 714fc069262SSyed Nayyar Waris 715fc069262SSyed Nayyar Waris /* Only 24-bit values are supported */ 716fc069262SSyed Nayyar Waris if (ceiling > 0xFFFFFF) 717fc069262SSyed Nayyar Waris return -EINVAL; 718fc069262SSyed Nayyar Waris 719fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 720f1d8a071SWilliam Breathitt Gray 721f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 722f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 723f1d8a071SWilliam Breathitt Gray case 1: 724f1d8a071SWilliam Breathitt Gray case 3: 725fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, ceiling); 726728246e8SWilliam Breathitt Gray mutex_unlock(&priv->lock); 727728246e8SWilliam Breathitt Gray return len; 728f1d8a071SWilliam Breathitt Gray } 729f1d8a071SWilliam Breathitt Gray 730fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 731fc069262SSyed Nayyar Waris 732728246e8SWilliam Breathitt Gray return -EINVAL; 733f1d8a071SWilliam Breathitt Gray } 734f1d8a071SWilliam Breathitt Gray 735f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_read(struct counter_device *counter, 736f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, char *buf) 737f1d8a071SWilliam Breathitt Gray { 738e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 739f1d8a071SWilliam Breathitt Gray 740f1d8a071SWilliam Breathitt Gray return sprintf(buf, "%u\n", !priv->preset_enable[count->id]); 741f1d8a071SWilliam Breathitt Gray } 742f1d8a071SWilliam Breathitt Gray 743f1d8a071SWilliam Breathitt Gray static ssize_t quad8_count_preset_enable_write(struct counter_device *counter, 744f1d8a071SWilliam Breathitt Gray struct counter_count *count, void *private, const char *buf, size_t len) 745f1d8a071SWilliam Breathitt Gray { 746e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 747f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 748f1d8a071SWilliam Breathitt Gray bool preset_enable; 749f1d8a071SWilliam Breathitt Gray int ret; 750f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 751f1d8a071SWilliam Breathitt Gray 752f1d8a071SWilliam Breathitt Gray ret = kstrtobool(buf, &preset_enable); 753f1d8a071SWilliam Breathitt Gray if (ret) 754f1d8a071SWilliam Breathitt Gray return ret; 755f1d8a071SWilliam Breathitt Gray 756f1d8a071SWilliam Breathitt Gray /* Preset enable is active low in Input/Output Control register */ 757f1d8a071SWilliam Breathitt Gray preset_enable = !preset_enable; 758f1d8a071SWilliam Breathitt Gray 759fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 760fc069262SSyed Nayyar Waris 761f1d8a071SWilliam Breathitt Gray priv->preset_enable[count->id] = preset_enable; 762f1d8a071SWilliam Breathitt Gray 763f1d8a071SWilliam Breathitt Gray ior_cfg = priv->ab_enable[count->id] | (unsigned int)preset_enable << 1; 764f1d8a071SWilliam Breathitt Gray 765f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration to Input / Output Control Register */ 766f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 767f1d8a071SWilliam Breathitt Gray 768fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 769fc069262SSyed Nayyar Waris 770f1d8a071SWilliam Breathitt Gray return len; 771f1d8a071SWilliam Breathitt Gray } 772f1d8a071SWilliam Breathitt Gray 773954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter, 774954ab5ccSWilliam Breathitt Gray struct counter_signal *signal, 775954ab5ccSWilliam Breathitt Gray void *private, char *buf) 776954ab5ccSWilliam Breathitt Gray { 777e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 778954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 779708d9893SSyed Nayyar Waris bool disabled; 780954ab5ccSWilliam Breathitt Gray unsigned int status; 781954ab5ccSWilliam Breathitt Gray unsigned int fault; 782954ab5ccSWilliam Breathitt Gray 783708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 784708d9893SSyed Nayyar Waris 785708d9893SSyed Nayyar Waris disabled = !(priv->cable_fault_enable & BIT(channel_id)); 786708d9893SSyed Nayyar Waris 787708d9893SSyed Nayyar Waris if (disabled) { 788708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 789954ab5ccSWilliam Breathitt Gray return -EINVAL; 790708d9893SSyed Nayyar Waris } 791954ab5ccSWilliam Breathitt Gray 792954ab5ccSWilliam Breathitt Gray /* Logic 0 = cable fault */ 793954ab5ccSWilliam Breathitt Gray status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 794954ab5ccSWilliam Breathitt Gray 795708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 796708d9893SSyed Nayyar Waris 797954ab5ccSWilliam Breathitt Gray /* Mask respective channel and invert logic */ 798954ab5ccSWilliam Breathitt Gray fault = !(status & BIT(channel_id)); 799954ab5ccSWilliam Breathitt Gray 800954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", fault); 801954ab5ccSWilliam Breathitt Gray } 802954ab5ccSWilliam Breathitt Gray 803954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_read( 804954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 805954ab5ccSWilliam Breathitt Gray void *private, char *buf) 806954ab5ccSWilliam Breathitt Gray { 807e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 808954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 809954ab5ccSWilliam Breathitt Gray const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id)); 810954ab5ccSWilliam Breathitt Gray 811954ab5ccSWilliam Breathitt Gray return sprintf(buf, "%u\n", enb); 812954ab5ccSWilliam Breathitt Gray } 813954ab5ccSWilliam Breathitt Gray 814954ab5ccSWilliam Breathitt Gray static ssize_t quad8_signal_cable_fault_enable_write( 815954ab5ccSWilliam Breathitt Gray struct counter_device *counter, struct counter_signal *signal, 816954ab5ccSWilliam Breathitt Gray void *private, const char *buf, size_t len) 817954ab5ccSWilliam Breathitt Gray { 818e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 819954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 820954ab5ccSWilliam Breathitt Gray bool enable; 821954ab5ccSWilliam Breathitt Gray int ret; 822954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 823954ab5ccSWilliam Breathitt Gray 824954ab5ccSWilliam Breathitt Gray ret = kstrtobool(buf, &enable); 825954ab5ccSWilliam Breathitt Gray if (ret) 826954ab5ccSWilliam Breathitt Gray return ret; 827954ab5ccSWilliam Breathitt Gray 828708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 829708d9893SSyed Nayyar Waris 830954ab5ccSWilliam Breathitt Gray if (enable) 831954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable |= BIT(channel_id); 832954ab5ccSWilliam Breathitt Gray else 833954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable &= ~BIT(channel_id); 834954ab5ccSWilliam Breathitt Gray 835954ab5ccSWilliam Breathitt Gray /* Enable is active low in Differential Encoder Cable Status register */ 836954ab5ccSWilliam Breathitt Gray cable_fault_enable = ~priv->cable_fault_enable; 837954ab5ccSWilliam Breathitt Gray 838954ab5ccSWilliam Breathitt Gray outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 839954ab5ccSWilliam Breathitt Gray 840708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 841708d9893SSyed Nayyar Waris 842954ab5ccSWilliam Breathitt Gray return len; 843954ab5ccSWilliam Breathitt Gray } 844954ab5ccSWilliam Breathitt Gray 845de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter, 846de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, char *buf) 847de65d055SWilliam Breathitt Gray { 848e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 849de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 850de65d055SWilliam Breathitt Gray 851de65d055SWilliam Breathitt Gray return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]); 852de65d055SWilliam Breathitt Gray } 853de65d055SWilliam Breathitt Gray 854de65d055SWilliam Breathitt Gray static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter, 855de65d055SWilliam Breathitt Gray struct counter_signal *signal, void *private, const char *buf, 856de65d055SWilliam Breathitt Gray size_t len) 857de65d055SWilliam Breathitt Gray { 858e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 859de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 860de65d055SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id; 861de65d055SWilliam Breathitt Gray u8 prescaler; 862de65d055SWilliam Breathitt Gray int ret; 863de65d055SWilliam Breathitt Gray 864de65d055SWilliam Breathitt Gray ret = kstrtou8(buf, 0, &prescaler); 865de65d055SWilliam Breathitt Gray if (ret) 866de65d055SWilliam Breathitt Gray return ret; 867de65d055SWilliam Breathitt Gray 868d5ed76adSSyed Nayyar Waris mutex_lock(&priv->lock); 869d5ed76adSSyed Nayyar Waris 870de65d055SWilliam Breathitt Gray priv->fck_prescaler[channel_id] = prescaler; 871de65d055SWilliam Breathitt Gray 872de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 873de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 874de65d055SWilliam Breathitt Gray 875de65d055SWilliam Breathitt Gray /* Set filter clock factor */ 876de65d055SWilliam Breathitt Gray outb(prescaler, base_offset); 877de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 878de65d055SWilliam Breathitt Gray base_offset + 1); 879de65d055SWilliam Breathitt Gray 880d5ed76adSSyed Nayyar Waris mutex_unlock(&priv->lock); 881d5ed76adSSyed Nayyar Waris 882de65d055SWilliam Breathitt Gray return len; 883de65d055SWilliam Breathitt Gray } 884de65d055SWilliam Breathitt Gray 885de65d055SWilliam Breathitt Gray static const struct counter_signal_ext quad8_signal_ext[] = { 886de65d055SWilliam Breathitt Gray { 887954ab5ccSWilliam Breathitt Gray .name = "cable_fault", 888954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_read 889954ab5ccSWilliam Breathitt Gray }, 890954ab5ccSWilliam Breathitt Gray { 891954ab5ccSWilliam Breathitt Gray .name = "cable_fault_enable", 892954ab5ccSWilliam Breathitt Gray .read = quad8_signal_cable_fault_enable_read, 893954ab5ccSWilliam Breathitt Gray .write = quad8_signal_cable_fault_enable_write 894954ab5ccSWilliam Breathitt Gray }, 895954ab5ccSWilliam Breathitt Gray { 896de65d055SWilliam Breathitt Gray .name = "filter_clock_prescaler", 897de65d055SWilliam Breathitt Gray .read = quad8_signal_fck_prescaler_read, 898de65d055SWilliam Breathitt Gray .write = quad8_signal_fck_prescaler_write 899de65d055SWilliam Breathitt Gray } 900de65d055SWilliam Breathitt Gray }; 901de65d055SWilliam Breathitt Gray 902f1d8a071SWilliam Breathitt Gray static const struct counter_signal_ext quad8_index_ext[] = { 903f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("index_polarity", &quad8_index_pol_enum), 904f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("index_polarity", &quad8_index_pol_enum), 905f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM("synchronous_mode", &quad8_syn_mode_enum), 906f1d8a071SWilliam Breathitt Gray COUNTER_SIGNAL_ENUM_AVAILABLE("synchronous_mode", &quad8_syn_mode_enum) 907f1d8a071SWilliam Breathitt Gray }; 908f1d8a071SWilliam Breathitt Gray 909f1d8a071SWilliam Breathitt Gray #define QUAD8_QUAD_SIGNAL(_id, _name) { \ 910f1d8a071SWilliam Breathitt Gray .id = (_id), \ 911de65d055SWilliam Breathitt Gray .name = (_name), \ 912de65d055SWilliam Breathitt Gray .ext = quad8_signal_ext, \ 913de65d055SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_signal_ext) \ 914f1d8a071SWilliam Breathitt Gray } 915f1d8a071SWilliam Breathitt Gray 916f1d8a071SWilliam Breathitt Gray #define QUAD8_INDEX_SIGNAL(_id, _name) { \ 917f1d8a071SWilliam Breathitt Gray .id = (_id), \ 918f1d8a071SWilliam Breathitt Gray .name = (_name), \ 919f1d8a071SWilliam Breathitt Gray .ext = quad8_index_ext, \ 920f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_index_ext) \ 921f1d8a071SWilliam Breathitt Gray } 922f1d8a071SWilliam Breathitt Gray 923f1d8a071SWilliam Breathitt Gray static struct counter_signal quad8_signals[] = { 924f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(0, "Channel 1 Quadrature A"), 925f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(1, "Channel 1 Quadrature B"), 926f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(2, "Channel 2 Quadrature A"), 927f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(3, "Channel 2 Quadrature B"), 928f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(4, "Channel 3 Quadrature A"), 929f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(5, "Channel 3 Quadrature B"), 930f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(6, "Channel 4 Quadrature A"), 931f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(7, "Channel 4 Quadrature B"), 932f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(8, "Channel 5 Quadrature A"), 933f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(9, "Channel 5 Quadrature B"), 934f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(10, "Channel 6 Quadrature A"), 935f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(11, "Channel 6 Quadrature B"), 936f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(12, "Channel 7 Quadrature A"), 937f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(13, "Channel 7 Quadrature B"), 938f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(14, "Channel 8 Quadrature A"), 939f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(15, "Channel 8 Quadrature B"), 940f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(16, "Channel 1 Index"), 941f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(17, "Channel 2 Index"), 942f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(18, "Channel 3 Index"), 943f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(19, "Channel 4 Index"), 944f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(20, "Channel 5 Index"), 945f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(21, "Channel 6 Index"), 946f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(22, "Channel 7 Index"), 947f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(23, "Channel 8 Index") 948f1d8a071SWilliam Breathitt Gray }; 949f1d8a071SWilliam Breathitt Gray 950f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT_SYNAPSES(_id) { \ 951f1d8a071SWilliam Breathitt Gray { \ 952f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 953f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 954f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) \ 955f1d8a071SWilliam Breathitt Gray }, \ 956f1d8a071SWilliam Breathitt Gray { \ 957f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 958f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 959f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 1 \ 960f1d8a071SWilliam Breathitt Gray }, \ 961f1d8a071SWilliam Breathitt Gray { \ 962f1d8a071SWilliam Breathitt Gray .actions_list = quad8_index_actions_list, \ 963f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_index_actions_list), \ 964f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 16 \ 965f1d8a071SWilliam Breathitt Gray } \ 966f1d8a071SWilliam Breathitt Gray } 967f1d8a071SWilliam Breathitt Gray 968f1d8a071SWilliam Breathitt Gray static struct counter_synapse quad8_count_synapses[][3] = { 969f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(0), QUAD8_COUNT_SYNAPSES(1), 970f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(2), QUAD8_COUNT_SYNAPSES(3), 971f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(4), QUAD8_COUNT_SYNAPSES(5), 972f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7) 973f1d8a071SWilliam Breathitt Gray }; 974f1d8a071SWilliam Breathitt Gray 975f1d8a071SWilliam Breathitt Gray static const struct counter_count_ext quad8_count_ext[] = { 976f1d8a071SWilliam Breathitt Gray { 977f1d8a071SWilliam Breathitt Gray .name = "ceiling", 978f1d8a071SWilliam Breathitt Gray .read = quad8_count_ceiling_read, 979f1d8a071SWilliam Breathitt Gray .write = quad8_count_ceiling_write 980f1d8a071SWilliam Breathitt Gray }, 981f1d8a071SWilliam Breathitt Gray { 982f1d8a071SWilliam Breathitt Gray .name = "floor", 983f1d8a071SWilliam Breathitt Gray .read = quad8_count_floor_read 984f1d8a071SWilliam Breathitt Gray }, 985f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("count_mode", &quad8_cnt_mode_enum), 986f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("count_mode", &quad8_cnt_mode_enum), 987f1d8a071SWilliam Breathitt Gray { 988f1d8a071SWilliam Breathitt Gray .name = "direction", 989f1d8a071SWilliam Breathitt Gray .read = quad8_count_direction_read 990f1d8a071SWilliam Breathitt Gray }, 991f1d8a071SWilliam Breathitt Gray { 992f1d8a071SWilliam Breathitt Gray .name = "enable", 993f1d8a071SWilliam Breathitt Gray .read = quad8_count_enable_read, 994f1d8a071SWilliam Breathitt Gray .write = quad8_count_enable_write 995f1d8a071SWilliam Breathitt Gray }, 996f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM("error_noise", &quad8_error_noise_enum), 997f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_ENUM_AVAILABLE("error_noise", &quad8_error_noise_enum), 998f1d8a071SWilliam Breathitt Gray { 999f1d8a071SWilliam Breathitt Gray .name = "preset", 1000f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_read, 1001f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_write 1002f1d8a071SWilliam Breathitt Gray }, 1003f1d8a071SWilliam Breathitt Gray { 1004f1d8a071SWilliam Breathitt Gray .name = "preset_enable", 1005f1d8a071SWilliam Breathitt Gray .read = quad8_count_preset_enable_read, 1006f1d8a071SWilliam Breathitt Gray .write = quad8_count_preset_enable_write 1007f1d8a071SWilliam Breathitt Gray } 1008f1d8a071SWilliam Breathitt Gray }; 1009f1d8a071SWilliam Breathitt Gray 1010f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT(_id, _cntname) { \ 1011f1d8a071SWilliam Breathitt Gray .id = (_id), \ 1012f1d8a071SWilliam Breathitt Gray .name = (_cntname), \ 1013f1d8a071SWilliam Breathitt Gray .functions_list = quad8_count_functions_list, \ 1014f1d8a071SWilliam Breathitt Gray .num_functions = ARRAY_SIZE(quad8_count_functions_list), \ 1015f1d8a071SWilliam Breathitt Gray .synapses = quad8_count_synapses[(_id)], \ 1016f1d8a071SWilliam Breathitt Gray .num_synapses = 2, \ 1017f1d8a071SWilliam Breathitt Gray .ext = quad8_count_ext, \ 1018f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_count_ext) \ 1019f1d8a071SWilliam Breathitt Gray } 1020f1d8a071SWilliam Breathitt Gray 1021f1d8a071SWilliam Breathitt Gray static struct counter_count quad8_counts[] = { 1022f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(0, "Channel 1 Count"), 1023f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(1, "Channel 2 Count"), 1024f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(2, "Channel 3 Count"), 1025f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(3, "Channel 4 Count"), 1026f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(4, "Channel 5 Count"), 1027f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(5, "Channel 6 Count"), 1028f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(6, "Channel 7 Count"), 1029f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(7, "Channel 8 Count") 1030f1d8a071SWilliam Breathitt Gray }; 1031f1d8a071SWilliam Breathitt Gray 1032f1d8a071SWilliam Breathitt Gray static int quad8_probe(struct device *dev, unsigned int id) 1033f1d8a071SWilliam Breathitt Gray { 1034e357e81fSWilliam Breathitt Gray struct quad8 *priv; 1035f1d8a071SWilliam Breathitt Gray int i, j; 1036f1d8a071SWilliam Breathitt Gray unsigned int base_offset; 1037f1d8a071SWilliam Breathitt Gray 1038f1d8a071SWilliam Breathitt Gray if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) { 1039f1d8a071SWilliam Breathitt Gray dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", 1040f1d8a071SWilliam Breathitt Gray base[id], base[id] + QUAD8_EXTENT); 1041f1d8a071SWilliam Breathitt Gray return -EBUSY; 1042f1d8a071SWilliam Breathitt Gray } 1043f1d8a071SWilliam Breathitt Gray 1044e357e81fSWilliam Breathitt Gray priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1045e357e81fSWilliam Breathitt Gray if (!priv) 1046f1d8a071SWilliam Breathitt Gray return -ENOMEM; 1047f1d8a071SWilliam Breathitt Gray 1048f1d8a071SWilliam Breathitt Gray /* Initialize Counter device and driver data */ 1049e357e81fSWilliam Breathitt Gray priv->counter.name = dev_name(dev); 1050e357e81fSWilliam Breathitt Gray priv->counter.parent = dev; 1051e357e81fSWilliam Breathitt Gray priv->counter.ops = &quad8_ops; 1052e357e81fSWilliam Breathitt Gray priv->counter.counts = quad8_counts; 1053e357e81fSWilliam Breathitt Gray priv->counter.num_counts = ARRAY_SIZE(quad8_counts); 1054e357e81fSWilliam Breathitt Gray priv->counter.signals = quad8_signals; 1055e357e81fSWilliam Breathitt Gray priv->counter.num_signals = ARRAY_SIZE(quad8_signals); 1056e357e81fSWilliam Breathitt Gray priv->counter.priv = priv; 1057e357e81fSWilliam Breathitt Gray priv->base = base[id]; 1058f1d8a071SWilliam Breathitt Gray 1059fc069262SSyed Nayyar Waris /* Initialize mutex */ 1060e357e81fSWilliam Breathitt Gray mutex_init(&priv->lock); 1061fc069262SSyed Nayyar Waris 1062f1d8a071SWilliam Breathitt Gray /* Reset all counters and disable interrupt function */ 1063f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1064f1d8a071SWilliam Breathitt Gray /* Set initial configuration for all counters */ 1065f1d8a071SWilliam Breathitt Gray for (i = 0; i < QUAD8_NUM_COUNTERS; i++) { 1066f1d8a071SWilliam Breathitt Gray base_offset = base[id] + 2 * i; 1067f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 1068f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1069de65d055SWilliam Breathitt Gray /* Reset filter clock factor */ 1070de65d055SWilliam Breathitt Gray outb(0, base_offset); 1071de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 1072de65d055SWilliam Breathitt Gray base_offset + 1); 1073de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 1074de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1075f1d8a071SWilliam Breathitt Gray /* Reset Preset Register */ 1076f1d8a071SWilliam Breathitt Gray for (j = 0; j < 3; j++) 1077f1d8a071SWilliam Breathitt Gray outb(0x00, base_offset); 1078f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 1079f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 1080f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 1081f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 1082f1d8a071SWilliam Breathitt Gray /* Binary encoding; Normal count; non-quadrature mode */ 1083f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR, base_offset + 1); 1084f1d8a071SWilliam Breathitt Gray /* Disable A and B inputs; preset on index; FLG1 as Carry */ 1085f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR, base_offset + 1); 1086f1d8a071SWilliam Breathitt Gray /* Disable index function; negative index polarity */ 1087f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR, base_offset + 1); 1088f1d8a071SWilliam Breathitt Gray } 1089954ab5ccSWilliam Breathitt Gray /* Disable Differential Encoder Cable Status for all channels */ 1090954ab5ccSWilliam Breathitt Gray outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS); 1091f1d8a071SWilliam Breathitt Gray /* Enable all counters */ 1092f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1093f1d8a071SWilliam Breathitt Gray 1094e357e81fSWilliam Breathitt Gray return devm_counter_register(dev, &priv->counter); 1095f1d8a071SWilliam Breathitt Gray } 1096f1d8a071SWilliam Breathitt Gray 1097f1d8a071SWilliam Breathitt Gray static struct isa_driver quad8_driver = { 1098f1d8a071SWilliam Breathitt Gray .probe = quad8_probe, 1099f1d8a071SWilliam Breathitt Gray .driver = { 1100f1d8a071SWilliam Breathitt Gray .name = "104-quad-8" 1101f1d8a071SWilliam Breathitt Gray } 1102f1d8a071SWilliam Breathitt Gray }; 1103f1d8a071SWilliam Breathitt Gray 1104f1d8a071SWilliam Breathitt Gray module_isa_driver(quad8_driver, num_quad8); 1105f1d8a071SWilliam Breathitt Gray 1106f1d8a071SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); 1107e357e81fSWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver"); 1108f1d8a071SWilliam Breathitt Gray MODULE_LICENSE("GPL v2"); 1109