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 3194a853ecSWilliam Breathitt Gray * @lock: lock to prevent clobbering device states during R/W ops 32f1d8a071SWilliam Breathitt Gray * @counter: instance of the counter_device 33954ab5ccSWilliam Breathitt Gray * @fck_prescaler: array of filter clock prescaler configurations 34f1d8a071SWilliam Breathitt Gray * @preset: array of preset values 35f1d8a071SWilliam Breathitt Gray * @count_mode: array of count mode configurations 36f1d8a071SWilliam Breathitt Gray * @quadrature_mode: array of quadrature mode configurations 37f1d8a071SWilliam Breathitt Gray * @quadrature_scale: array of quadrature mode scale configurations 38f1d8a071SWilliam Breathitt Gray * @ab_enable: array of A and B inputs enable configurations 39f1d8a071SWilliam Breathitt Gray * @preset_enable: array of set_to_preset_on_index attribute configurations 40f1d8a071SWilliam Breathitt Gray * @synchronous_mode: array of index function synchronous mode configurations 41f1d8a071SWilliam Breathitt Gray * @index_polarity: array of index function polarity configurations 42954ab5ccSWilliam Breathitt Gray * @cable_fault_enable: differential encoder cable status enable configurations 43e357e81fSWilliam Breathitt Gray * @base: base port address of the device 44f1d8a071SWilliam Breathitt Gray */ 45e357e81fSWilliam Breathitt Gray struct quad8 { 46fc069262SSyed Nayyar Waris struct mutex lock; 47f1d8a071SWilliam Breathitt Gray struct counter_device counter; 48de65d055SWilliam Breathitt Gray unsigned int fck_prescaler[QUAD8_NUM_COUNTERS]; 49f1d8a071SWilliam Breathitt Gray unsigned int preset[QUAD8_NUM_COUNTERS]; 50f1d8a071SWilliam Breathitt Gray unsigned int count_mode[QUAD8_NUM_COUNTERS]; 51f1d8a071SWilliam Breathitt Gray unsigned int quadrature_mode[QUAD8_NUM_COUNTERS]; 52f1d8a071SWilliam Breathitt Gray unsigned int quadrature_scale[QUAD8_NUM_COUNTERS]; 53f1d8a071SWilliam Breathitt Gray unsigned int ab_enable[QUAD8_NUM_COUNTERS]; 54f1d8a071SWilliam Breathitt Gray unsigned int preset_enable[QUAD8_NUM_COUNTERS]; 55f1d8a071SWilliam Breathitt Gray unsigned int synchronous_mode[QUAD8_NUM_COUNTERS]; 56f1d8a071SWilliam Breathitt Gray unsigned int index_polarity[QUAD8_NUM_COUNTERS]; 57954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 58f1d8a071SWilliam Breathitt Gray unsigned int base; 59f1d8a071SWilliam Breathitt Gray }; 60f1d8a071SWilliam Breathitt Gray 61f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_CHAN_OP 0x11 62f1d8a071SWilliam Breathitt Gray #define QUAD8_REG_INDEX_INPUT_LEVELS 0x16 63954ab5ccSWilliam Breathitt Gray #define QUAD8_DIFF_ENCODER_CABLE_STATUS 0x17 64f1d8a071SWilliam Breathitt Gray /* Borrow Toggle flip-flop */ 65f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_BT BIT(0) 66f1d8a071SWilliam Breathitt Gray /* Carry Toggle flip-flop */ 67f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_CT BIT(1) 68f1d8a071SWilliam Breathitt Gray /* Error flag */ 69f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_E BIT(4) 70f1d8a071SWilliam Breathitt Gray /* Up/Down flag */ 71f1d8a071SWilliam Breathitt Gray #define QUAD8_FLAG_UD BIT(5) 72f1d8a071SWilliam Breathitt Gray /* Reset and Load Signal Decoders */ 73f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_RLD 0x00 74f1d8a071SWilliam Breathitt Gray /* Counter Mode Register */ 75f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_CMR 0x20 76f1d8a071SWilliam Breathitt Gray /* Input / Output Control Register */ 77f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IOR 0x40 78f1d8a071SWilliam Breathitt Gray /* Index Control Register */ 79f1d8a071SWilliam Breathitt Gray #define QUAD8_CTR_IDR 0x60 80f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer (three byte data pointer) */ 81f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_BP 0x01 82f1d8a071SWilliam Breathitt Gray /* Reset Counter */ 83f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_CNTR 0x02 84f1d8a071SWilliam Breathitt Gray /* Reset Borrow Toggle, Carry Toggle, Compare Toggle, and Sign flags */ 85f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_FLAGS 0x04 86f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 87f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_RESET_E 0x06 88f1d8a071SWilliam Breathitt Gray /* Preset Register to Counter */ 89f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_CNTR 0x08 90f1d8a071SWilliam Breathitt Gray /* Transfer Counter to Output Latch */ 91f1d8a071SWilliam Breathitt Gray #define QUAD8_RLD_CNTR_OUT 0x10 92de65d055SWilliam Breathitt Gray /* Transfer Preset Register LSB to FCK Prescaler */ 93de65d055SWilliam Breathitt Gray #define QUAD8_RLD_PRESET_PSC 0x18 94f1d8a071SWilliam Breathitt Gray #define QUAD8_CHAN_OP_ENABLE_COUNTERS 0x00 95f1d8a071SWilliam Breathitt Gray #define QUAD8_CHAN_OP_RESET_COUNTERS 0x01 96f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X1 0x08 97f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X2 0x10 98f1d8a071SWilliam Breathitt Gray #define QUAD8_CMR_QUADRATURE_X4 0x18 99f1d8a071SWilliam Breathitt Gray 100f1d8a071SWilliam Breathitt Gray static int quad8_signal_read(struct counter_device *counter, 101493b938aSWilliam Breathitt Gray struct counter_signal *signal, 102493b938aSWilliam Breathitt Gray enum counter_signal_level *level) 103f1d8a071SWilliam Breathitt Gray { 104e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 105f1d8a071SWilliam Breathitt Gray unsigned int state; 106f1d8a071SWilliam Breathitt Gray 107f1d8a071SWilliam Breathitt Gray /* Only Index signal levels can be read */ 108f1d8a071SWilliam Breathitt Gray if (signal->id < 16) 109f1d8a071SWilliam Breathitt Gray return -EINVAL; 110f1d8a071SWilliam Breathitt Gray 111f1d8a071SWilliam Breathitt Gray state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS) 112f1d8a071SWilliam Breathitt Gray & BIT(signal->id - 16); 113f1d8a071SWilliam Breathitt Gray 114493b938aSWilliam Breathitt Gray *level = (state) ? COUNTER_SIGNAL_LEVEL_HIGH : COUNTER_SIGNAL_LEVEL_LOW; 115f1d8a071SWilliam Breathitt Gray 116f1d8a071SWilliam Breathitt Gray return 0; 117f1d8a071SWilliam Breathitt Gray } 118f1d8a071SWilliam Breathitt Gray 119f1d8a071SWilliam Breathitt Gray static int quad8_count_read(struct counter_device *counter, 120*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *val) 121f1d8a071SWilliam Breathitt Gray { 122e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 123f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 124f1d8a071SWilliam Breathitt Gray unsigned int flags; 125f1d8a071SWilliam Breathitt Gray unsigned int borrow; 126f1d8a071SWilliam Breathitt Gray unsigned int carry; 127f1d8a071SWilliam Breathitt Gray int i; 128f1d8a071SWilliam Breathitt Gray 129f1d8a071SWilliam Breathitt Gray flags = inb(base_offset + 1); 130f1d8a071SWilliam Breathitt Gray borrow = flags & QUAD8_FLAG_BT; 131f1d8a071SWilliam Breathitt Gray carry = !!(flags & QUAD8_FLAG_CT); 132f1d8a071SWilliam Breathitt Gray 133f1d8a071SWilliam Breathitt Gray /* Borrow XOR Carry effectively doubles count range */ 134d49e6ee2SWilliam Breathitt Gray *val = (unsigned long)(borrow ^ carry) << 24; 135f1d8a071SWilliam Breathitt Gray 136fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 137fc069262SSyed Nayyar Waris 138f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer; transfer Counter to Output Latch */ 139f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT, 140f1d8a071SWilliam Breathitt Gray base_offset + 1); 141f1d8a071SWilliam Breathitt Gray 142f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 143d49e6ee2SWilliam Breathitt Gray *val |= (unsigned long)inb(base_offset) << (8 * i); 144f1d8a071SWilliam Breathitt Gray 145fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 146fc069262SSyed Nayyar Waris 147f1d8a071SWilliam Breathitt Gray return 0; 148f1d8a071SWilliam Breathitt Gray } 149f1d8a071SWilliam Breathitt Gray 150f1d8a071SWilliam Breathitt Gray static int quad8_count_write(struct counter_device *counter, 151*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 val) 152f1d8a071SWilliam Breathitt Gray { 153e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 154f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 155f1d8a071SWilliam Breathitt Gray int i; 156f1d8a071SWilliam Breathitt Gray 157f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 158d49e6ee2SWilliam Breathitt Gray if (val > 0xFFFFFF) 159e2ff3198SWilliam Breathitt Gray return -ERANGE; 160f1d8a071SWilliam Breathitt Gray 161fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 162fc069262SSyed Nayyar Waris 163f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 164f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 165f1d8a071SWilliam Breathitt Gray 166f1d8a071SWilliam Breathitt Gray /* Counter can only be set via Preset Register */ 167f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 168d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 169f1d8a071SWilliam Breathitt Gray 170f1d8a071SWilliam Breathitt Gray /* Transfer Preset Register to Counter */ 171f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1); 172f1d8a071SWilliam Breathitt Gray 173f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 174f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 175f1d8a071SWilliam Breathitt Gray 176f1d8a071SWilliam Breathitt Gray /* Set Preset Register back to original value */ 177d49e6ee2SWilliam Breathitt Gray val = priv->preset[count->id]; 178f1d8a071SWilliam Breathitt Gray for (i = 0; i < 3; i++) 179d49e6ee2SWilliam Breathitt Gray outb(val >> (8 * i), base_offset); 180f1d8a071SWilliam Breathitt Gray 181f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 182f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 183f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 184f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 185f1d8a071SWilliam Breathitt Gray 186fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 187fc069262SSyed Nayyar Waris 188f1d8a071SWilliam Breathitt Gray return 0; 189f1d8a071SWilliam Breathitt Gray } 190f1d8a071SWilliam Breathitt Gray 191394a0150SWilliam Breathitt Gray static const enum counter_function quad8_count_functions_list[] = { 192*aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_PULSE_DIRECTION, 193*aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X1_A, 194*aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X2_A, 195*aaec1a0fSWilliam Breathitt Gray COUNTER_FUNCTION_QUADRATURE_X4, 196f1d8a071SWilliam Breathitt Gray }; 197f1d8a071SWilliam Breathitt Gray 198*aaec1a0fSWilliam Breathitt Gray static int quad8_function_read(struct counter_device *counter, 199*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 200*aaec1a0fSWilliam Breathitt Gray enum counter_function *function) 201f1d8a071SWilliam Breathitt Gray { 202e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 203f1d8a071SWilliam Breathitt Gray const int id = count->id; 204f1d8a071SWilliam Breathitt Gray 205fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 206fc069262SSyed Nayyar Waris 207fc069262SSyed Nayyar Waris if (priv->quadrature_mode[id]) 208fc069262SSyed Nayyar Waris switch (priv->quadrature_scale[id]) { 209f1d8a071SWilliam Breathitt Gray case 0: 210*aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X1_A; 211f1d8a071SWilliam Breathitt Gray break; 212f1d8a071SWilliam Breathitt Gray case 1: 213*aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X2_A; 214f1d8a071SWilliam Breathitt Gray break; 215f1d8a071SWilliam Breathitt Gray case 2: 216*aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_QUADRATURE_X4; 217f1d8a071SWilliam Breathitt Gray break; 218f1d8a071SWilliam Breathitt Gray } 219f1d8a071SWilliam Breathitt Gray else 220*aaec1a0fSWilliam Breathitt Gray *function = COUNTER_FUNCTION_PULSE_DIRECTION; 221f1d8a071SWilliam Breathitt Gray 222fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 223fc069262SSyed Nayyar Waris 224f1d8a071SWilliam Breathitt Gray return 0; 225f1d8a071SWilliam Breathitt Gray } 226f1d8a071SWilliam Breathitt Gray 227*aaec1a0fSWilliam Breathitt Gray static int quad8_function_write(struct counter_device *counter, 228*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 229*aaec1a0fSWilliam Breathitt Gray enum counter_function function) 230f1d8a071SWilliam Breathitt Gray { 231e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 232f1d8a071SWilliam Breathitt Gray const int id = count->id; 233f1d8a071SWilliam Breathitt Gray unsigned int *const quadrature_mode = priv->quadrature_mode + id; 234f1d8a071SWilliam Breathitt Gray unsigned int *const scale = priv->quadrature_scale + id; 235f1d8a071SWilliam Breathitt Gray unsigned int *const synchronous_mode = priv->synchronous_mode + id; 236f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * id + 1; 237fc069262SSyed Nayyar Waris unsigned int mode_cfg; 238fc069262SSyed Nayyar Waris unsigned int idr_cfg; 239fc069262SSyed Nayyar Waris 240fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 241fc069262SSyed Nayyar Waris 242fc069262SSyed Nayyar Waris mode_cfg = priv->count_mode[id] << 1; 243fc069262SSyed Nayyar Waris idr_cfg = priv->index_polarity[id] << 1; 244f1d8a071SWilliam Breathitt Gray 245*aaec1a0fSWilliam Breathitt Gray if (function == COUNTER_FUNCTION_PULSE_DIRECTION) { 246f1d8a071SWilliam Breathitt Gray *quadrature_mode = 0; 247f1d8a071SWilliam Breathitt Gray 248f1d8a071SWilliam Breathitt Gray /* Quadrature scaling only available in quadrature mode */ 249f1d8a071SWilliam Breathitt Gray *scale = 0; 250f1d8a071SWilliam Breathitt Gray 251f1d8a071SWilliam Breathitt Gray /* Synchronous function not supported in non-quadrature mode */ 252f1d8a071SWilliam Breathitt Gray if (*synchronous_mode) { 253f1d8a071SWilliam Breathitt Gray *synchronous_mode = 0; 254f1d8a071SWilliam Breathitt Gray /* Disable synchronous function mode */ 255f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 256f1d8a071SWilliam Breathitt Gray } 257f1d8a071SWilliam Breathitt Gray } else { 258f1d8a071SWilliam Breathitt Gray *quadrature_mode = 1; 259f1d8a071SWilliam Breathitt Gray 260f1d8a071SWilliam Breathitt Gray switch (function) { 261*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X1_A: 262f1d8a071SWilliam Breathitt Gray *scale = 0; 263f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X1; 264f1d8a071SWilliam Breathitt Gray break; 265*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X2_A: 266f1d8a071SWilliam Breathitt Gray *scale = 1; 267f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X2; 268f1d8a071SWilliam Breathitt Gray break; 269*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X4: 270f1d8a071SWilliam Breathitt Gray *scale = 2; 271f1d8a071SWilliam Breathitt Gray mode_cfg |= QUAD8_CMR_QUADRATURE_X4; 272f1d8a071SWilliam Breathitt Gray break; 273b11eed15SWilliam Breathitt Gray default: 274b11eed15SWilliam Breathitt Gray /* should never reach this path */ 275b11eed15SWilliam Breathitt Gray mutex_unlock(&priv->lock); 276b11eed15SWilliam Breathitt Gray return -EINVAL; 277f1d8a071SWilliam Breathitt Gray } 278f1d8a071SWilliam Breathitt Gray } 279f1d8a071SWilliam Breathitt Gray 280f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 281f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 282f1d8a071SWilliam Breathitt Gray 283fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 284fc069262SSyed Nayyar Waris 285f1d8a071SWilliam Breathitt Gray return 0; 286f1d8a071SWilliam Breathitt Gray } 287f1d8a071SWilliam Breathitt Gray 288*aaec1a0fSWilliam Breathitt Gray static int quad8_direction_read(struct counter_device *counter, 289*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 290*aaec1a0fSWilliam Breathitt Gray enum counter_count_direction *direction) 291f1d8a071SWilliam Breathitt Gray { 292e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 293f1d8a071SWilliam Breathitt Gray unsigned int ud_flag; 294f1d8a071SWilliam Breathitt Gray const unsigned int flag_addr = priv->base + 2 * count->id + 1; 295f1d8a071SWilliam Breathitt Gray 296f1d8a071SWilliam Breathitt Gray /* U/D flag: nonzero = up, zero = down */ 297f1d8a071SWilliam Breathitt Gray ud_flag = inb(flag_addr) & QUAD8_FLAG_UD; 298f1d8a071SWilliam Breathitt Gray 299f1d8a071SWilliam Breathitt Gray *direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD : 300f1d8a071SWilliam Breathitt Gray COUNTER_COUNT_DIRECTION_BACKWARD; 301*aaec1a0fSWilliam Breathitt Gray 302*aaec1a0fSWilliam Breathitt Gray return 0; 303f1d8a071SWilliam Breathitt Gray } 304f1d8a071SWilliam Breathitt Gray 3056a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_index_actions_list[] = { 306*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_NONE, 307*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_RISING_EDGE, 308f1d8a071SWilliam Breathitt Gray }; 309f1d8a071SWilliam Breathitt Gray 3106a9eb0e3SWilliam Breathitt Gray static const enum counter_synapse_action quad8_synapse_actions_list[] = { 311*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_NONE, 312*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_RISING_EDGE, 313*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_FALLING_EDGE, 314*aaec1a0fSWilliam Breathitt Gray COUNTER_SYNAPSE_ACTION_BOTH_EDGES, 315f1d8a071SWilliam Breathitt Gray }; 316f1d8a071SWilliam Breathitt Gray 317*aaec1a0fSWilliam Breathitt Gray static int quad8_action_read(struct counter_device *counter, 318*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 319*aaec1a0fSWilliam Breathitt Gray struct counter_synapse *synapse, 320*aaec1a0fSWilliam Breathitt Gray enum counter_synapse_action *action) 321f1d8a071SWilliam Breathitt Gray { 322e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 323f1d8a071SWilliam Breathitt Gray int err; 324*aaec1a0fSWilliam Breathitt Gray enum counter_function function; 325f1d8a071SWilliam Breathitt Gray const size_t signal_a_id = count->synapses[0].signal->id; 326f1d8a071SWilliam Breathitt Gray enum counter_count_direction direction; 327f1d8a071SWilliam Breathitt Gray 328f1d8a071SWilliam Breathitt Gray /* Handle Index signals */ 329f1d8a071SWilliam Breathitt Gray if (synapse->signal->id >= 16) { 330f1d8a071SWilliam Breathitt Gray if (priv->preset_enable[count->id]) 331*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 332f1d8a071SWilliam Breathitt Gray else 333*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_NONE; 334f1d8a071SWilliam Breathitt Gray 335f1d8a071SWilliam Breathitt Gray return 0; 336f1d8a071SWilliam Breathitt Gray } 337f1d8a071SWilliam Breathitt Gray 338*aaec1a0fSWilliam Breathitt Gray err = quad8_function_read(counter, count, &function); 339f1d8a071SWilliam Breathitt Gray if (err) 340f1d8a071SWilliam Breathitt Gray return err; 341f1d8a071SWilliam Breathitt Gray 342f1d8a071SWilliam Breathitt Gray /* Default action mode */ 343*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_NONE; 344f1d8a071SWilliam Breathitt Gray 345f1d8a071SWilliam Breathitt Gray /* Determine action mode based on current count function mode */ 346f1d8a071SWilliam Breathitt Gray switch (function) { 347*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_PULSE_DIRECTION: 348f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 349*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 350b11eed15SWilliam Breathitt Gray return 0; 351*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X1_A: 352f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) { 353*aaec1a0fSWilliam Breathitt Gray err = quad8_direction_read(counter, count, &direction); 354*aaec1a0fSWilliam Breathitt Gray if (err) 355*aaec1a0fSWilliam Breathitt Gray return err; 356f1d8a071SWilliam Breathitt Gray 357f1d8a071SWilliam Breathitt Gray if (direction == COUNTER_COUNT_DIRECTION_FORWARD) 358*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; 359f1d8a071SWilliam Breathitt Gray else 360*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE; 361f1d8a071SWilliam Breathitt Gray } 362b11eed15SWilliam Breathitt Gray return 0; 363*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X2_A: 364f1d8a071SWilliam Breathitt Gray if (synapse->signal->id == signal_a_id) 365*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; 366b11eed15SWilliam Breathitt Gray return 0; 367*aaec1a0fSWilliam Breathitt Gray case COUNTER_FUNCTION_QUADRATURE_X4: 368*aaec1a0fSWilliam Breathitt Gray *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; 369f1d8a071SWilliam Breathitt Gray return 0; 370b11eed15SWilliam Breathitt Gray default: 371b11eed15SWilliam Breathitt Gray /* should never reach this path */ 372b11eed15SWilliam Breathitt Gray return -EINVAL; 373b11eed15SWilliam Breathitt Gray } 374f1d8a071SWilliam Breathitt Gray } 375f1d8a071SWilliam Breathitt Gray 37617aa207eSYueHaibing static const struct counter_ops quad8_ops = { 377f1d8a071SWilliam Breathitt Gray .signal_read = quad8_signal_read, 378f1d8a071SWilliam Breathitt Gray .count_read = quad8_count_read, 379f1d8a071SWilliam Breathitt Gray .count_write = quad8_count_write, 380*aaec1a0fSWilliam Breathitt Gray .function_read = quad8_function_read, 381*aaec1a0fSWilliam Breathitt Gray .function_write = quad8_function_write, 382*aaec1a0fSWilliam Breathitt Gray .action_read = quad8_action_read 383f1d8a071SWilliam Breathitt Gray }; 384f1d8a071SWilliam Breathitt Gray 385e357e81fSWilliam Breathitt Gray static const char *const quad8_index_polarity_modes[] = { 386e357e81fSWilliam Breathitt Gray "negative", 387e357e81fSWilliam Breathitt Gray "positive" 388e357e81fSWilliam Breathitt Gray }; 389e357e81fSWilliam Breathitt Gray 390f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_get(struct counter_device *counter, 391*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 392*aaec1a0fSWilliam Breathitt Gray u32 *index_polarity) 393f1d8a071SWilliam Breathitt Gray { 394e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 395f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 396f1d8a071SWilliam Breathitt Gray 397f1d8a071SWilliam Breathitt Gray *index_polarity = priv->index_polarity[channel_id]; 398f1d8a071SWilliam Breathitt Gray 399f1d8a071SWilliam Breathitt Gray return 0; 400f1d8a071SWilliam Breathitt Gray } 401f1d8a071SWilliam Breathitt Gray 402f1d8a071SWilliam Breathitt Gray static int quad8_index_polarity_set(struct counter_device *counter, 403*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 404*aaec1a0fSWilliam Breathitt Gray u32 index_polarity) 405f1d8a071SWilliam Breathitt Gray { 406e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 407f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 408f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 409fc069262SSyed Nayyar Waris unsigned int idr_cfg = index_polarity << 1; 410fc069262SSyed Nayyar Waris 411fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 412fc069262SSyed Nayyar Waris 413fc069262SSyed Nayyar Waris idr_cfg |= priv->synchronous_mode[channel_id]; 414f1d8a071SWilliam Breathitt Gray 415f1d8a071SWilliam Breathitt Gray priv->index_polarity[channel_id] = index_polarity; 416f1d8a071SWilliam Breathitt Gray 417f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 418f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 419f1d8a071SWilliam Breathitt Gray 420fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 421fc069262SSyed Nayyar Waris 422f1d8a071SWilliam Breathitt Gray return 0; 423f1d8a071SWilliam Breathitt Gray } 424f1d8a071SWilliam Breathitt Gray 425e357e81fSWilliam Breathitt Gray static const char *const quad8_synchronous_modes[] = { 426e357e81fSWilliam Breathitt Gray "non-synchronous", 427e357e81fSWilliam Breathitt Gray "synchronous" 428e357e81fSWilliam Breathitt Gray }; 429e357e81fSWilliam Breathitt Gray 430f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_get(struct counter_device *counter, 431*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 432*aaec1a0fSWilliam Breathitt Gray u32 *synchronous_mode) 433f1d8a071SWilliam Breathitt Gray { 434e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 435f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 436f1d8a071SWilliam Breathitt Gray 437f1d8a071SWilliam Breathitt Gray *synchronous_mode = priv->synchronous_mode[channel_id]; 438f1d8a071SWilliam Breathitt Gray 439f1d8a071SWilliam Breathitt Gray return 0; 440f1d8a071SWilliam Breathitt Gray } 441f1d8a071SWilliam Breathitt Gray 442f1d8a071SWilliam Breathitt Gray static int quad8_synchronous_mode_set(struct counter_device *counter, 443*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 444*aaec1a0fSWilliam Breathitt Gray u32 synchronous_mode) 445f1d8a071SWilliam Breathitt Gray { 446e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 447f1d8a071SWilliam Breathitt Gray const size_t channel_id = signal->id - 16; 448f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id + 1; 449fc069262SSyed Nayyar Waris unsigned int idr_cfg = synchronous_mode; 450fc069262SSyed Nayyar Waris 451fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 452fc069262SSyed Nayyar Waris 453fc069262SSyed Nayyar Waris idr_cfg |= priv->index_polarity[channel_id] << 1; 454f1d8a071SWilliam Breathitt Gray 455f1d8a071SWilliam Breathitt Gray /* Index function must be non-synchronous in non-quadrature mode */ 456fc069262SSyed Nayyar Waris if (synchronous_mode && !priv->quadrature_mode[channel_id]) { 457fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 458f1d8a071SWilliam Breathitt Gray return -EINVAL; 459fc069262SSyed Nayyar Waris } 460f1d8a071SWilliam Breathitt Gray 461f1d8a071SWilliam Breathitt Gray priv->synchronous_mode[channel_id] = synchronous_mode; 462f1d8a071SWilliam Breathitt Gray 463f1d8a071SWilliam Breathitt Gray /* Load Index Control configuration to Index Control Register */ 464f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR | idr_cfg, base_offset); 465f1d8a071SWilliam Breathitt Gray 466fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 467fc069262SSyed Nayyar Waris 468f1d8a071SWilliam Breathitt Gray return 0; 469f1d8a071SWilliam Breathitt Gray } 470f1d8a071SWilliam Breathitt Gray 471*aaec1a0fSWilliam Breathitt Gray static int quad8_count_floor_read(struct counter_device *counter, 472*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *floor) 473f1d8a071SWilliam Breathitt Gray { 474f1d8a071SWilliam Breathitt Gray /* Only a floor of 0 is supported */ 475*aaec1a0fSWilliam Breathitt Gray *floor = 0; 476*aaec1a0fSWilliam Breathitt Gray 477*aaec1a0fSWilliam Breathitt Gray return 0; 478f1d8a071SWilliam Breathitt Gray } 479f1d8a071SWilliam Breathitt Gray 480*aaec1a0fSWilliam Breathitt Gray static int quad8_count_mode_read(struct counter_device *counter, 481*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 482*aaec1a0fSWilliam Breathitt Gray enum counter_count_mode *cnt_mode) 483f1d8a071SWilliam Breathitt Gray { 484e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 485f1d8a071SWilliam Breathitt Gray 486f1d8a071SWilliam Breathitt Gray /* Map 104-QUAD-8 count mode to Generic Counter count mode */ 487f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 488f1d8a071SWilliam Breathitt Gray case 0: 489f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NORMAL; 490f1d8a071SWilliam Breathitt Gray break; 491f1d8a071SWilliam Breathitt Gray case 1: 492f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_RANGE_LIMIT; 493f1d8a071SWilliam Breathitt Gray break; 494f1d8a071SWilliam Breathitt Gray case 2: 495f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_NON_RECYCLE; 496f1d8a071SWilliam Breathitt Gray break; 497f1d8a071SWilliam Breathitt Gray case 3: 498f1d8a071SWilliam Breathitt Gray *cnt_mode = COUNTER_COUNT_MODE_MODULO_N; 499f1d8a071SWilliam Breathitt Gray break; 500f1d8a071SWilliam Breathitt Gray } 501f1d8a071SWilliam Breathitt Gray 502f1d8a071SWilliam Breathitt Gray return 0; 503f1d8a071SWilliam Breathitt Gray } 504f1d8a071SWilliam Breathitt Gray 505*aaec1a0fSWilliam Breathitt Gray static int quad8_count_mode_write(struct counter_device *counter, 506*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 507*aaec1a0fSWilliam Breathitt Gray enum counter_count_mode cnt_mode) 508f1d8a071SWilliam Breathitt Gray { 509e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 510*aaec1a0fSWilliam Breathitt Gray unsigned int count_mode; 511f1d8a071SWilliam Breathitt Gray unsigned int mode_cfg; 512f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 513f1d8a071SWilliam Breathitt Gray 514f1d8a071SWilliam Breathitt Gray /* Map Generic Counter count mode to 104-QUAD-8 count mode */ 515f1d8a071SWilliam Breathitt Gray switch (cnt_mode) { 516f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NORMAL: 517*aaec1a0fSWilliam Breathitt Gray count_mode = 0; 518f1d8a071SWilliam Breathitt Gray break; 519f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_RANGE_LIMIT: 520*aaec1a0fSWilliam Breathitt Gray count_mode = 1; 521f1d8a071SWilliam Breathitt Gray break; 522f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_NON_RECYCLE: 523*aaec1a0fSWilliam Breathitt Gray count_mode = 2; 524f1d8a071SWilliam Breathitt Gray break; 525f1d8a071SWilliam Breathitt Gray case COUNTER_COUNT_MODE_MODULO_N: 526*aaec1a0fSWilliam Breathitt Gray count_mode = 3; 527f1d8a071SWilliam Breathitt Gray break; 528b11eed15SWilliam Breathitt Gray default: 529b11eed15SWilliam Breathitt Gray /* should never reach this path */ 530b11eed15SWilliam Breathitt Gray return -EINVAL; 531f1d8a071SWilliam Breathitt Gray } 532f1d8a071SWilliam Breathitt Gray 533fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 534fc069262SSyed Nayyar Waris 535*aaec1a0fSWilliam Breathitt Gray priv->count_mode[count->id] = count_mode; 536f1d8a071SWilliam Breathitt Gray 537f1d8a071SWilliam Breathitt Gray /* Set count mode configuration value */ 538*aaec1a0fSWilliam Breathitt Gray mode_cfg = count_mode << 1; 539f1d8a071SWilliam Breathitt Gray 540f1d8a071SWilliam Breathitt Gray /* Add quadrature mode configuration */ 541f1d8a071SWilliam Breathitt Gray if (priv->quadrature_mode[count->id]) 542f1d8a071SWilliam Breathitt Gray mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3; 543f1d8a071SWilliam Breathitt Gray 544f1d8a071SWilliam Breathitt Gray /* Load mode configuration to Counter Mode Register */ 545f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR | mode_cfg, base_offset); 546f1d8a071SWilliam Breathitt Gray 547fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 548fc069262SSyed Nayyar Waris 549f1d8a071SWilliam Breathitt Gray return 0; 550f1d8a071SWilliam Breathitt Gray } 551f1d8a071SWilliam Breathitt Gray 552*aaec1a0fSWilliam Breathitt Gray static int quad8_count_enable_read(struct counter_device *counter, 553*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u8 *enable) 554f1d8a071SWilliam Breathitt Gray { 555e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 556f1d8a071SWilliam Breathitt Gray 557*aaec1a0fSWilliam Breathitt Gray *enable = priv->ab_enable[count->id]; 558*aaec1a0fSWilliam Breathitt Gray 559*aaec1a0fSWilliam Breathitt Gray return 0; 560f1d8a071SWilliam Breathitt Gray } 561f1d8a071SWilliam Breathitt Gray 562*aaec1a0fSWilliam Breathitt Gray static int quad8_count_enable_write(struct counter_device *counter, 563*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u8 enable) 564f1d8a071SWilliam Breathitt Gray { 565e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 566f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id; 567f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 568f1d8a071SWilliam Breathitt Gray 569fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 570fc069262SSyed Nayyar Waris 571*aaec1a0fSWilliam Breathitt Gray priv->ab_enable[count->id] = enable; 572f1d8a071SWilliam Breathitt Gray 573*aaec1a0fSWilliam Breathitt Gray ior_cfg = enable | priv->preset_enable[count->id] << 1; 574f1d8a071SWilliam Breathitt Gray 575f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration */ 576f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1); 577f1d8a071SWilliam Breathitt Gray 578fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 579fc069262SSyed Nayyar Waris 580*aaec1a0fSWilliam Breathitt Gray return 0; 581f1d8a071SWilliam Breathitt Gray } 582f1d8a071SWilliam Breathitt Gray 583e357e81fSWilliam Breathitt Gray static const char *const quad8_noise_error_states[] = { 584e357e81fSWilliam Breathitt Gray "No excessive noise is present at the count inputs", 585e357e81fSWilliam Breathitt Gray "Excessive noise is present at the count inputs" 586e357e81fSWilliam Breathitt Gray }; 587e357e81fSWilliam Breathitt Gray 588f1d8a071SWilliam Breathitt Gray static int quad8_error_noise_get(struct counter_device *counter, 589*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u32 *noise_error) 590f1d8a071SWilliam Breathitt Gray { 591e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 592f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 593f1d8a071SWilliam Breathitt Gray 594f1d8a071SWilliam Breathitt Gray *noise_error = !!(inb(base_offset) & QUAD8_FLAG_E); 595f1d8a071SWilliam Breathitt Gray 596f1d8a071SWilliam Breathitt Gray return 0; 597f1d8a071SWilliam Breathitt Gray } 598f1d8a071SWilliam Breathitt Gray 599*aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_read(struct counter_device *counter, 600*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *preset) 601f1d8a071SWilliam Breathitt Gray { 602e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 603f1d8a071SWilliam Breathitt Gray 604*aaec1a0fSWilliam Breathitt Gray *preset = priv->preset[count->id]; 605*aaec1a0fSWilliam Breathitt Gray 606*aaec1a0fSWilliam Breathitt Gray return 0; 607f1d8a071SWilliam Breathitt Gray } 608f1d8a071SWilliam Breathitt Gray 609e612b600SWilliam Breathitt Gray static void quad8_preset_register_set(struct quad8 *const priv, const int id, 610e612b600SWilliam Breathitt Gray const unsigned int preset) 611fc069262SSyed Nayyar Waris { 612e357e81fSWilliam Breathitt Gray const unsigned int base_offset = priv->base + 2 * id; 613fc069262SSyed Nayyar Waris int i; 614fc069262SSyed Nayyar Waris 615e357e81fSWilliam Breathitt Gray priv->preset[id] = preset; 616fc069262SSyed Nayyar Waris 617fc069262SSyed Nayyar Waris /* Reset Byte Pointer */ 618fc069262SSyed Nayyar Waris outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 619fc069262SSyed Nayyar Waris 620fc069262SSyed Nayyar Waris /* Set Preset Register */ 621fc069262SSyed Nayyar Waris for (i = 0; i < 3; i++) 622fc069262SSyed Nayyar Waris outb(preset >> (8 * i), base_offset); 623fc069262SSyed Nayyar Waris } 624fc069262SSyed Nayyar Waris 625*aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_write(struct counter_device *counter, 626*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 preset) 627f1d8a071SWilliam Breathitt Gray { 628e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 629f1d8a071SWilliam Breathitt Gray 630f1d8a071SWilliam Breathitt Gray /* Only 24-bit values are supported */ 631f1d8a071SWilliam Breathitt Gray if (preset > 0xFFFFFF) 632e2ff3198SWilliam Breathitt Gray return -ERANGE; 633f1d8a071SWilliam Breathitt Gray 634fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 635f1d8a071SWilliam Breathitt Gray 636fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, preset); 637f1d8a071SWilliam Breathitt Gray 638fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 639f1d8a071SWilliam Breathitt Gray 640*aaec1a0fSWilliam Breathitt Gray return 0; 641f1d8a071SWilliam Breathitt Gray } 642f1d8a071SWilliam Breathitt Gray 643*aaec1a0fSWilliam Breathitt Gray static int quad8_count_ceiling_read(struct counter_device *counter, 644*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 *ceiling) 645f1d8a071SWilliam Breathitt Gray { 646e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 647fc069262SSyed Nayyar Waris 648fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 649f1d8a071SWilliam Breathitt Gray 650f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 651f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 652f1d8a071SWilliam Breathitt Gray case 1: 653f1d8a071SWilliam Breathitt Gray case 3: 654*aaec1a0fSWilliam Breathitt Gray *ceiling = priv->preset[count->id]; 655*aaec1a0fSWilliam Breathitt Gray break; 656*aaec1a0fSWilliam Breathitt Gray default: 657f1d8a071SWilliam Breathitt Gray /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */ 658*aaec1a0fSWilliam Breathitt Gray *ceiling = 0x1FFFFFF; 659*aaec1a0fSWilliam Breathitt Gray break; 660f1d8a071SWilliam Breathitt Gray } 661f1d8a071SWilliam Breathitt Gray 662*aaec1a0fSWilliam Breathitt Gray mutex_unlock(&priv->lock); 663*aaec1a0fSWilliam Breathitt Gray 664*aaec1a0fSWilliam Breathitt Gray return 0; 665*aaec1a0fSWilliam Breathitt Gray } 666*aaec1a0fSWilliam Breathitt Gray 667*aaec1a0fSWilliam Breathitt Gray static int quad8_count_ceiling_write(struct counter_device *counter, 668*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, u64 ceiling) 669f1d8a071SWilliam Breathitt Gray { 670e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 671fc069262SSyed Nayyar Waris 672fc069262SSyed Nayyar Waris /* Only 24-bit values are supported */ 673fc069262SSyed Nayyar Waris if (ceiling > 0xFFFFFF) 674e2ff3198SWilliam Breathitt Gray return -ERANGE; 675fc069262SSyed Nayyar Waris 676fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 677f1d8a071SWilliam Breathitt Gray 678f1d8a071SWilliam Breathitt Gray /* Range Limit and Modulo-N count modes use preset value as ceiling */ 679f1d8a071SWilliam Breathitt Gray switch (priv->count_mode[count->id]) { 680f1d8a071SWilliam Breathitt Gray case 1: 681f1d8a071SWilliam Breathitt Gray case 3: 682fc069262SSyed Nayyar Waris quad8_preset_register_set(priv, count->id, ceiling); 683728246e8SWilliam Breathitt Gray mutex_unlock(&priv->lock); 684*aaec1a0fSWilliam Breathitt Gray return 0; 685f1d8a071SWilliam Breathitt Gray } 686f1d8a071SWilliam Breathitt Gray 687fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 688fc069262SSyed Nayyar Waris 689728246e8SWilliam Breathitt Gray return -EINVAL; 690f1d8a071SWilliam Breathitt Gray } 691f1d8a071SWilliam Breathitt Gray 692*aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_enable_read(struct counter_device *counter, 693*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 694*aaec1a0fSWilliam Breathitt Gray u8 *preset_enable) 695f1d8a071SWilliam Breathitt Gray { 696e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 697f1d8a071SWilliam Breathitt Gray 698*aaec1a0fSWilliam Breathitt Gray *preset_enable = !priv->preset_enable[count->id]; 699*aaec1a0fSWilliam Breathitt Gray 700*aaec1a0fSWilliam Breathitt Gray return 0; 701f1d8a071SWilliam Breathitt Gray } 702f1d8a071SWilliam Breathitt Gray 703*aaec1a0fSWilliam Breathitt Gray static int quad8_count_preset_enable_write(struct counter_device *counter, 704*aaec1a0fSWilliam Breathitt Gray struct counter_count *count, 705*aaec1a0fSWilliam Breathitt Gray u8 preset_enable) 706f1d8a071SWilliam Breathitt Gray { 707e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 708f1d8a071SWilliam Breathitt Gray const int base_offset = priv->base + 2 * count->id + 1; 709f1d8a071SWilliam Breathitt Gray unsigned int ior_cfg; 710f1d8a071SWilliam Breathitt Gray 711f1d8a071SWilliam Breathitt Gray /* Preset enable is active low in Input/Output Control register */ 712f1d8a071SWilliam Breathitt Gray preset_enable = !preset_enable; 713f1d8a071SWilliam Breathitt Gray 714fc069262SSyed Nayyar Waris mutex_lock(&priv->lock); 715fc069262SSyed Nayyar Waris 716f1d8a071SWilliam Breathitt Gray priv->preset_enable[count->id] = preset_enable; 717f1d8a071SWilliam Breathitt Gray 718*aaec1a0fSWilliam Breathitt Gray ior_cfg = priv->ab_enable[count->id] | preset_enable << 1; 719f1d8a071SWilliam Breathitt Gray 720f1d8a071SWilliam Breathitt Gray /* Load I/O control configuration to Input / Output Control Register */ 721f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR | ior_cfg, base_offset); 722f1d8a071SWilliam Breathitt Gray 723fc069262SSyed Nayyar Waris mutex_unlock(&priv->lock); 724fc069262SSyed Nayyar Waris 725*aaec1a0fSWilliam Breathitt Gray return 0; 726f1d8a071SWilliam Breathitt Gray } 727f1d8a071SWilliam Breathitt Gray 728*aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_read(struct counter_device *counter, 729954ab5ccSWilliam Breathitt Gray struct counter_signal *signal, 730*aaec1a0fSWilliam Breathitt Gray u8 *cable_fault) 731954ab5ccSWilliam Breathitt Gray { 732e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 733954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 734708d9893SSyed Nayyar Waris bool disabled; 735954ab5ccSWilliam Breathitt Gray unsigned int status; 736954ab5ccSWilliam Breathitt Gray 737708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 738708d9893SSyed Nayyar Waris 739708d9893SSyed Nayyar Waris disabled = !(priv->cable_fault_enable & BIT(channel_id)); 740708d9893SSyed Nayyar Waris 741708d9893SSyed Nayyar Waris if (disabled) { 742708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 743954ab5ccSWilliam Breathitt Gray return -EINVAL; 744708d9893SSyed Nayyar Waris } 745954ab5ccSWilliam Breathitt Gray 746954ab5ccSWilliam Breathitt Gray /* Logic 0 = cable fault */ 747954ab5ccSWilliam Breathitt Gray status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 748954ab5ccSWilliam Breathitt Gray 749708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 750708d9893SSyed Nayyar Waris 751954ab5ccSWilliam Breathitt Gray /* Mask respective channel and invert logic */ 752*aaec1a0fSWilliam Breathitt Gray *cable_fault = !(status & BIT(channel_id)); 753954ab5ccSWilliam Breathitt Gray 754*aaec1a0fSWilliam Breathitt Gray return 0; 755954ab5ccSWilliam Breathitt Gray } 756954ab5ccSWilliam Breathitt Gray 757*aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_enable_read(struct counter_device *counter, 758*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 759*aaec1a0fSWilliam Breathitt Gray u8 *enable) 760954ab5ccSWilliam Breathitt Gray { 761e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 762954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 763954ab5ccSWilliam Breathitt Gray 764*aaec1a0fSWilliam Breathitt Gray *enable = !!(priv->cable_fault_enable & BIT(channel_id)); 765*aaec1a0fSWilliam Breathitt Gray 766*aaec1a0fSWilliam Breathitt Gray return 0; 767954ab5ccSWilliam Breathitt Gray } 768954ab5ccSWilliam Breathitt Gray 769*aaec1a0fSWilliam Breathitt Gray static int quad8_signal_cable_fault_enable_write(struct counter_device *counter, 770*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 771*aaec1a0fSWilliam Breathitt Gray u8 enable) 772954ab5ccSWilliam Breathitt Gray { 773e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 774954ab5ccSWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 775954ab5ccSWilliam Breathitt Gray unsigned int cable_fault_enable; 776954ab5ccSWilliam Breathitt Gray 777708d9893SSyed Nayyar Waris mutex_lock(&priv->lock); 778708d9893SSyed Nayyar Waris 779954ab5ccSWilliam Breathitt Gray if (enable) 780954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable |= BIT(channel_id); 781954ab5ccSWilliam Breathitt Gray else 782954ab5ccSWilliam Breathitt Gray priv->cable_fault_enable &= ~BIT(channel_id); 783954ab5ccSWilliam Breathitt Gray 784954ab5ccSWilliam Breathitt Gray /* Enable is active low in Differential Encoder Cable Status register */ 785954ab5ccSWilliam Breathitt Gray cable_fault_enable = ~priv->cable_fault_enable; 786954ab5ccSWilliam Breathitt Gray 787954ab5ccSWilliam Breathitt Gray outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); 788954ab5ccSWilliam Breathitt Gray 789708d9893SSyed Nayyar Waris mutex_unlock(&priv->lock); 790708d9893SSyed Nayyar Waris 791*aaec1a0fSWilliam Breathitt Gray return 0; 792954ab5ccSWilliam Breathitt Gray } 793954ab5ccSWilliam Breathitt Gray 794*aaec1a0fSWilliam Breathitt Gray static int quad8_signal_fck_prescaler_read(struct counter_device *counter, 795*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 796*aaec1a0fSWilliam Breathitt Gray u8 *prescaler) 797de65d055SWilliam Breathitt Gray { 798e357e81fSWilliam Breathitt Gray const struct quad8 *const priv = counter->priv; 799de65d055SWilliam Breathitt Gray 800*aaec1a0fSWilliam Breathitt Gray *prescaler = priv->fck_prescaler[signal->id / 2]; 801*aaec1a0fSWilliam Breathitt Gray 802*aaec1a0fSWilliam Breathitt Gray return 0; 803de65d055SWilliam Breathitt Gray } 804de65d055SWilliam Breathitt Gray 805*aaec1a0fSWilliam Breathitt Gray static int quad8_signal_fck_prescaler_write(struct counter_device *counter, 806*aaec1a0fSWilliam Breathitt Gray struct counter_signal *signal, 807*aaec1a0fSWilliam Breathitt Gray u8 prescaler) 808de65d055SWilliam Breathitt Gray { 809e357e81fSWilliam Breathitt Gray struct quad8 *const priv = counter->priv; 810de65d055SWilliam Breathitt Gray const size_t channel_id = signal->id / 2; 811de65d055SWilliam Breathitt Gray const int base_offset = priv->base + 2 * channel_id; 812de65d055SWilliam Breathitt Gray 813d5ed76adSSyed Nayyar Waris mutex_lock(&priv->lock); 814d5ed76adSSyed Nayyar Waris 815de65d055SWilliam Breathitt Gray priv->fck_prescaler[channel_id] = prescaler; 816de65d055SWilliam Breathitt Gray 817de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 818de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 819de65d055SWilliam Breathitt Gray 820de65d055SWilliam Breathitt Gray /* Set filter clock factor */ 821de65d055SWilliam Breathitt Gray outb(prescaler, base_offset); 822de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 823de65d055SWilliam Breathitt Gray base_offset + 1); 824de65d055SWilliam Breathitt Gray 825d5ed76adSSyed Nayyar Waris mutex_unlock(&priv->lock); 826d5ed76adSSyed Nayyar Waris 827*aaec1a0fSWilliam Breathitt Gray return 0; 828de65d055SWilliam Breathitt Gray } 829de65d055SWilliam Breathitt Gray 830*aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_signal_ext[] = { 831*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_BOOL("cable_fault", quad8_signal_cable_fault_read, 832*aaec1a0fSWilliam Breathitt Gray NULL), 833*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_BOOL("cable_fault_enable", 834*aaec1a0fSWilliam Breathitt Gray quad8_signal_cable_fault_enable_read, 835*aaec1a0fSWilliam Breathitt Gray quad8_signal_cable_fault_enable_write), 836*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_U8("filter_clock_prescaler", 837*aaec1a0fSWilliam Breathitt Gray quad8_signal_fck_prescaler_read, 838*aaec1a0fSWilliam Breathitt Gray quad8_signal_fck_prescaler_write) 839de65d055SWilliam Breathitt Gray }; 840de65d055SWilliam Breathitt Gray 841*aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_index_pol_enum, quad8_index_polarity_modes); 842*aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_synch_mode_enum, quad8_synchronous_modes); 843*aaec1a0fSWilliam Breathitt Gray 844*aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_index_ext[] = { 845*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_ENUM("index_polarity", quad8_index_polarity_get, 846*aaec1a0fSWilliam Breathitt Gray quad8_index_polarity_set, 847*aaec1a0fSWilliam Breathitt Gray quad8_index_pol_enum), 848*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_SIGNAL_ENUM("synchronous_mode", quad8_synchronous_mode_get, 849*aaec1a0fSWilliam Breathitt Gray quad8_synchronous_mode_set, 850*aaec1a0fSWilliam Breathitt Gray quad8_synch_mode_enum), 851f1d8a071SWilliam Breathitt Gray }; 852f1d8a071SWilliam Breathitt Gray 853f1d8a071SWilliam Breathitt Gray #define QUAD8_QUAD_SIGNAL(_id, _name) { \ 854f1d8a071SWilliam Breathitt Gray .id = (_id), \ 855de65d055SWilliam Breathitt Gray .name = (_name), \ 856de65d055SWilliam Breathitt Gray .ext = quad8_signal_ext, \ 857de65d055SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_signal_ext) \ 858f1d8a071SWilliam Breathitt Gray } 859f1d8a071SWilliam Breathitt Gray 860f1d8a071SWilliam Breathitt Gray #define QUAD8_INDEX_SIGNAL(_id, _name) { \ 861f1d8a071SWilliam Breathitt Gray .id = (_id), \ 862f1d8a071SWilliam Breathitt Gray .name = (_name), \ 863f1d8a071SWilliam Breathitt Gray .ext = quad8_index_ext, \ 864f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_index_ext) \ 865f1d8a071SWilliam Breathitt Gray } 866f1d8a071SWilliam Breathitt Gray 867f1d8a071SWilliam Breathitt Gray static struct counter_signal quad8_signals[] = { 868f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(0, "Channel 1 Quadrature A"), 869f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(1, "Channel 1 Quadrature B"), 870f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(2, "Channel 2 Quadrature A"), 871f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(3, "Channel 2 Quadrature B"), 872f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(4, "Channel 3 Quadrature A"), 873f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(5, "Channel 3 Quadrature B"), 874f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(6, "Channel 4 Quadrature A"), 875f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(7, "Channel 4 Quadrature B"), 876f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(8, "Channel 5 Quadrature A"), 877f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(9, "Channel 5 Quadrature B"), 878f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(10, "Channel 6 Quadrature A"), 879f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(11, "Channel 6 Quadrature B"), 880f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(12, "Channel 7 Quadrature A"), 881f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(13, "Channel 7 Quadrature B"), 882f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(14, "Channel 8 Quadrature A"), 883f1d8a071SWilliam Breathitt Gray QUAD8_QUAD_SIGNAL(15, "Channel 8 Quadrature B"), 884f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(16, "Channel 1 Index"), 885f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(17, "Channel 2 Index"), 886f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(18, "Channel 3 Index"), 887f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(19, "Channel 4 Index"), 888f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(20, "Channel 5 Index"), 889f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(21, "Channel 6 Index"), 890f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(22, "Channel 7 Index"), 891f1d8a071SWilliam Breathitt Gray QUAD8_INDEX_SIGNAL(23, "Channel 8 Index") 892f1d8a071SWilliam Breathitt Gray }; 893f1d8a071SWilliam Breathitt Gray 894f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT_SYNAPSES(_id) { \ 895f1d8a071SWilliam Breathitt Gray { \ 896f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 897f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 898f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) \ 899f1d8a071SWilliam Breathitt Gray }, \ 900f1d8a071SWilliam Breathitt Gray { \ 901f1d8a071SWilliam Breathitt Gray .actions_list = quad8_synapse_actions_list, \ 902f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_synapse_actions_list), \ 903f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 1 \ 904f1d8a071SWilliam Breathitt Gray }, \ 905f1d8a071SWilliam Breathitt Gray { \ 906f1d8a071SWilliam Breathitt Gray .actions_list = quad8_index_actions_list, \ 907f1d8a071SWilliam Breathitt Gray .num_actions = ARRAY_SIZE(quad8_index_actions_list), \ 908f1d8a071SWilliam Breathitt Gray .signal = quad8_signals + 2 * (_id) + 16 \ 909f1d8a071SWilliam Breathitt Gray } \ 910f1d8a071SWilliam Breathitt Gray } 911f1d8a071SWilliam Breathitt Gray 912f1d8a071SWilliam Breathitt Gray static struct counter_synapse quad8_count_synapses[][3] = { 913f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(0), QUAD8_COUNT_SYNAPSES(1), 914f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(2), QUAD8_COUNT_SYNAPSES(3), 915f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(4), QUAD8_COUNT_SYNAPSES(5), 916f1d8a071SWilliam Breathitt Gray QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7) 917f1d8a071SWilliam Breathitt Gray }; 918f1d8a071SWilliam Breathitt Gray 919*aaec1a0fSWilliam Breathitt Gray static const enum counter_count_mode quad8_cnt_modes[] = { 920*aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_NORMAL, 921*aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_RANGE_LIMIT, 922*aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_NON_RECYCLE, 923*aaec1a0fSWilliam Breathitt Gray COUNTER_COUNT_MODE_MODULO_N, 924*aaec1a0fSWilliam Breathitt Gray }; 925*aaec1a0fSWilliam Breathitt Gray 926*aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_AVAILABLE(quad8_count_mode_available, quad8_cnt_modes); 927*aaec1a0fSWilliam Breathitt Gray 928*aaec1a0fSWilliam Breathitt Gray static DEFINE_COUNTER_ENUM(quad8_error_noise_enum, quad8_noise_error_states); 929*aaec1a0fSWilliam Breathitt Gray 930*aaec1a0fSWilliam Breathitt Gray static struct counter_comp quad8_count_ext[] = { 931*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_CEILING(quad8_count_ceiling_read, 932*aaec1a0fSWilliam Breathitt Gray quad8_count_ceiling_write), 933*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_FLOOR(quad8_count_floor_read, NULL), 934*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_COUNT_MODE(quad8_count_mode_read, quad8_count_mode_write, 935*aaec1a0fSWilliam Breathitt Gray quad8_count_mode_available), 936*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_DIRECTION(quad8_direction_read), 937*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_ENABLE(quad8_count_enable_read, quad8_count_enable_write), 938*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_COUNT_ENUM("error_noise", quad8_error_noise_get, NULL, 939*aaec1a0fSWilliam Breathitt Gray quad8_error_noise_enum), 940*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_PRESET(quad8_count_preset_read, quad8_count_preset_write), 941*aaec1a0fSWilliam Breathitt Gray COUNTER_COMP_PRESET_ENABLE(quad8_count_preset_enable_read, 942*aaec1a0fSWilliam Breathitt Gray quad8_count_preset_enable_write), 943f1d8a071SWilliam Breathitt Gray }; 944f1d8a071SWilliam Breathitt Gray 945f1d8a071SWilliam Breathitt Gray #define QUAD8_COUNT(_id, _cntname) { \ 946f1d8a071SWilliam Breathitt Gray .id = (_id), \ 947f1d8a071SWilliam Breathitt Gray .name = (_cntname), \ 948f1d8a071SWilliam Breathitt Gray .functions_list = quad8_count_functions_list, \ 949f1d8a071SWilliam Breathitt Gray .num_functions = ARRAY_SIZE(quad8_count_functions_list), \ 950f1d8a071SWilliam Breathitt Gray .synapses = quad8_count_synapses[(_id)], \ 951f1d8a071SWilliam Breathitt Gray .num_synapses = 2, \ 952f1d8a071SWilliam Breathitt Gray .ext = quad8_count_ext, \ 953f1d8a071SWilliam Breathitt Gray .num_ext = ARRAY_SIZE(quad8_count_ext) \ 954f1d8a071SWilliam Breathitt Gray } 955f1d8a071SWilliam Breathitt Gray 956f1d8a071SWilliam Breathitt Gray static struct counter_count quad8_counts[] = { 957f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(0, "Channel 1 Count"), 958f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(1, "Channel 2 Count"), 959f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(2, "Channel 3 Count"), 960f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(3, "Channel 4 Count"), 961f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(4, "Channel 5 Count"), 962f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(5, "Channel 6 Count"), 963f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(6, "Channel 7 Count"), 964f1d8a071SWilliam Breathitt Gray QUAD8_COUNT(7, "Channel 8 Count") 965f1d8a071SWilliam Breathitt Gray }; 966f1d8a071SWilliam Breathitt Gray 967f1d8a071SWilliam Breathitt Gray static int quad8_probe(struct device *dev, unsigned int id) 968f1d8a071SWilliam Breathitt Gray { 969e357e81fSWilliam Breathitt Gray struct quad8 *priv; 970f1d8a071SWilliam Breathitt Gray int i, j; 971f1d8a071SWilliam Breathitt Gray unsigned int base_offset; 972f1d8a071SWilliam Breathitt Gray 973f1d8a071SWilliam Breathitt Gray if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) { 974f1d8a071SWilliam Breathitt Gray dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", 975f1d8a071SWilliam Breathitt Gray base[id], base[id] + QUAD8_EXTENT); 976f1d8a071SWilliam Breathitt Gray return -EBUSY; 977f1d8a071SWilliam Breathitt Gray } 978f1d8a071SWilliam Breathitt Gray 979e357e81fSWilliam Breathitt Gray priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 980e357e81fSWilliam Breathitt Gray if (!priv) 981f1d8a071SWilliam Breathitt Gray return -ENOMEM; 982f1d8a071SWilliam Breathitt Gray 983f1d8a071SWilliam Breathitt Gray /* Initialize Counter device and driver data */ 984e357e81fSWilliam Breathitt Gray priv->counter.name = dev_name(dev); 985e357e81fSWilliam Breathitt Gray priv->counter.parent = dev; 986e357e81fSWilliam Breathitt Gray priv->counter.ops = &quad8_ops; 987e357e81fSWilliam Breathitt Gray priv->counter.counts = quad8_counts; 988e357e81fSWilliam Breathitt Gray priv->counter.num_counts = ARRAY_SIZE(quad8_counts); 989e357e81fSWilliam Breathitt Gray priv->counter.signals = quad8_signals; 990e357e81fSWilliam Breathitt Gray priv->counter.num_signals = ARRAY_SIZE(quad8_signals); 991e357e81fSWilliam Breathitt Gray priv->counter.priv = priv; 992e357e81fSWilliam Breathitt Gray priv->base = base[id]; 993f1d8a071SWilliam Breathitt Gray 994fc069262SSyed Nayyar Waris /* Initialize mutex */ 995e357e81fSWilliam Breathitt Gray mutex_init(&priv->lock); 996fc069262SSyed Nayyar Waris 997f1d8a071SWilliam Breathitt Gray /* Reset all counters and disable interrupt function */ 998f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 999f1d8a071SWilliam Breathitt Gray /* Set initial configuration for all counters */ 1000f1d8a071SWilliam Breathitt Gray for (i = 0; i < QUAD8_NUM_COUNTERS; i++) { 1001f1d8a071SWilliam Breathitt Gray base_offset = base[id] + 2 * i; 1002f1d8a071SWilliam Breathitt Gray /* Reset Byte Pointer */ 1003f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1004de65d055SWilliam Breathitt Gray /* Reset filter clock factor */ 1005de65d055SWilliam Breathitt Gray outb(0, base_offset); 1006de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, 1007de65d055SWilliam Breathitt Gray base_offset + 1); 1008de65d055SWilliam Breathitt Gray /* Reset Byte Pointer */ 1009de65d055SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1); 1010f1d8a071SWilliam Breathitt Gray /* Reset Preset Register */ 1011f1d8a071SWilliam Breathitt Gray for (j = 0; j < 3; j++) 1012f1d8a071SWilliam Breathitt Gray outb(0x00, base_offset); 1013f1d8a071SWilliam Breathitt Gray /* Reset Borrow, Carry, Compare, and Sign flags */ 1014f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1); 1015f1d8a071SWilliam Breathitt Gray /* Reset Error flag */ 1016f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1); 1017f1d8a071SWilliam Breathitt Gray /* Binary encoding; Normal count; non-quadrature mode */ 1018f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_CMR, base_offset + 1); 1019f1d8a071SWilliam Breathitt Gray /* Disable A and B inputs; preset on index; FLG1 as Carry */ 1020f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IOR, base_offset + 1); 1021f1d8a071SWilliam Breathitt Gray /* Disable index function; negative index polarity */ 1022f1d8a071SWilliam Breathitt Gray outb(QUAD8_CTR_IDR, base_offset + 1); 1023f1d8a071SWilliam Breathitt Gray } 1024954ab5ccSWilliam Breathitt Gray /* Disable Differential Encoder Cable Status for all channels */ 1025954ab5ccSWilliam Breathitt Gray outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS); 1026f1d8a071SWilliam Breathitt Gray /* Enable all counters */ 1027f1d8a071SWilliam Breathitt Gray outb(QUAD8_CHAN_OP_ENABLE_COUNTERS, base[id] + QUAD8_REG_CHAN_OP); 1028f1d8a071SWilliam Breathitt Gray 1029e357e81fSWilliam Breathitt Gray return devm_counter_register(dev, &priv->counter); 1030f1d8a071SWilliam Breathitt Gray } 1031f1d8a071SWilliam Breathitt Gray 1032f1d8a071SWilliam Breathitt Gray static struct isa_driver quad8_driver = { 1033f1d8a071SWilliam Breathitt Gray .probe = quad8_probe, 1034f1d8a071SWilliam Breathitt Gray .driver = { 1035f1d8a071SWilliam Breathitt Gray .name = "104-quad-8" 1036f1d8a071SWilliam Breathitt Gray } 1037f1d8a071SWilliam Breathitt Gray }; 1038f1d8a071SWilliam Breathitt Gray 1039f1d8a071SWilliam Breathitt Gray module_isa_driver(quad8_driver, num_quad8); 1040f1d8a071SWilliam Breathitt Gray 1041f1d8a071SWilliam Breathitt Gray MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); 1042e357e81fSWilliam Breathitt Gray MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver"); 1043f1d8a071SWilliam Breathitt Gray MODULE_LICENSE("GPL v2"); 1044