1855feb68SLuiz Otavio O Souza /*- 2855feb68SLuiz Otavio O Souza * Copyright 2014 Luiz Otavio O Souza <loos@freebsd.org> 3855feb68SLuiz Otavio O Souza * All rights reserved. 4855feb68SLuiz Otavio O Souza * 5855feb68SLuiz Otavio O Souza * Redistribution and use in source and binary forms, with or without 6855feb68SLuiz Otavio O Souza * modification, are permitted provided that the following conditions 7855feb68SLuiz Otavio O Souza * are met: 8855feb68SLuiz Otavio O Souza * 1. Redistributions of source code must retain the above copyright 9855feb68SLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer. 10855feb68SLuiz Otavio O Souza * 2. Redistributions in binary form must reproduce the above copyright 11855feb68SLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer in the 12855feb68SLuiz Otavio O Souza * documentation and/or other materials provided with the distribution. 13855feb68SLuiz Otavio O Souza * 14855feb68SLuiz Otavio O Souza * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15855feb68SLuiz Otavio O Souza * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16855feb68SLuiz Otavio O Souza * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17855feb68SLuiz Otavio O Souza * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18855feb68SLuiz Otavio O Souza * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19855feb68SLuiz Otavio O Souza * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20855feb68SLuiz Otavio O Souza * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21855feb68SLuiz Otavio O Souza * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22855feb68SLuiz Otavio O Souza * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23855feb68SLuiz Otavio O Souza * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24855feb68SLuiz Otavio O Souza * SUCH DAMAGE. 25855feb68SLuiz Otavio O Souza */ 26855feb68SLuiz Otavio O Souza 27855feb68SLuiz Otavio O Souza #include <sys/cdefs.h> 28855feb68SLuiz Otavio O Souza __FBSDID("$FreeBSD$"); 29855feb68SLuiz Otavio O Souza 30855feb68SLuiz Otavio O Souza #include <sys/param.h> 31855feb68SLuiz Otavio O Souza #include <sys/systm.h> 32855feb68SLuiz Otavio O Souza #include <sys/bus.h> 33855feb68SLuiz Otavio O Souza 34651f7544SOleksandr Tymoshenko #include <sys/conf.h> 35855feb68SLuiz Otavio O Souza #include <sys/kernel.h> 36855feb68SLuiz Otavio O Souza #include <sys/limits.h> 37855feb68SLuiz Otavio O Souza #include <sys/lock.h> 38855feb68SLuiz Otavio O Souza #include <sys/module.h> 39855feb68SLuiz Otavio O Souza #include <sys/mutex.h> 40651f7544SOleksandr Tymoshenko #include <sys/condvar.h> 41855feb68SLuiz Otavio O Souza #include <sys/resource.h> 42855feb68SLuiz Otavio O Souza #include <sys/rman.h> 43855feb68SLuiz Otavio O Souza #include <sys/sysctl.h> 44651f7544SOleksandr Tymoshenko #include <sys/selinfo.h> 45651f7544SOleksandr Tymoshenko #include <sys/poll.h> 46651f7544SOleksandr Tymoshenko #include <sys/uio.h> 47855feb68SLuiz Otavio O Souza 48855feb68SLuiz Otavio O Souza #include <machine/bus.h> 49855feb68SLuiz Otavio O Souza 50651f7544SOleksandr Tymoshenko #include <dev/fdt/fdt_common.h> 51855feb68SLuiz Otavio O Souza #include <dev/ofw/openfirm.h> 52855feb68SLuiz Otavio O Souza #include <dev/ofw/ofw_bus.h> 53855feb68SLuiz Otavio O Souza #include <dev/ofw/ofw_bus_subr.h> 54855feb68SLuiz Otavio O Souza 55855feb68SLuiz Otavio O Souza #include <arm/ti/ti_prcm.h> 56855feb68SLuiz Otavio O Souza #include <arm/ti/ti_adcreg.h> 57855feb68SLuiz Otavio O Souza #include <arm/ti/ti_adcvar.h> 58855feb68SLuiz Otavio O Souza 59651f7544SOleksandr Tymoshenko #undef DEBUG_TSC 60651f7544SOleksandr Tymoshenko 61651f7544SOleksandr Tymoshenko #define DEFAULT_CHARGE_DELAY 0x400 62651f7544SOleksandr Tymoshenko #define STEPDLY_OPEN 0x98 63651f7544SOleksandr Tymoshenko 64651f7544SOleksandr Tymoshenko #define ORDER_XP 0 65651f7544SOleksandr Tymoshenko #define ORDER_XN 1 66651f7544SOleksandr Tymoshenko #define ORDER_YP 2 67651f7544SOleksandr Tymoshenko #define ORDER_YN 3 68651f7544SOleksandr Tymoshenko 69f7eebb77SLuiz Otavio O Souza /* Define our 8 steps, one for each input channel. */ 70855feb68SLuiz Otavio O Souza static struct ti_adc_input ti_adc_inputs[TI_ADC_NPINS] = { 71651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(1), .stepdelay = ADC_STEPDLY(1) }, 72651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(2), .stepdelay = ADC_STEPDLY(2) }, 73651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(3), .stepdelay = ADC_STEPDLY(3) }, 74651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(4), .stepdelay = ADC_STEPDLY(4) }, 75651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(5), .stepdelay = ADC_STEPDLY(5) }, 76651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(6), .stepdelay = ADC_STEPDLY(6) }, 77651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(7), .stepdelay = ADC_STEPDLY(7) }, 78651f7544SOleksandr Tymoshenko { .stepconfig = ADC_STEPCFG(8), .stepdelay = ADC_STEPDLY(8) }, 79855feb68SLuiz Otavio O Souza }; 80855feb68SLuiz Otavio O Souza 81855feb68SLuiz Otavio O Souza static int ti_adc_samples[5] = { 0, 2, 4, 8, 16 }; 82855feb68SLuiz Otavio O Souza 83855feb68SLuiz Otavio O Souza static void 84855feb68SLuiz Otavio O Souza ti_adc_enable(struct ti_adc_softc *sc) 85855feb68SLuiz Otavio O Souza { 86651f7544SOleksandr Tymoshenko uint32_t reg; 87855feb68SLuiz Otavio O Souza 88855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 89855feb68SLuiz Otavio O Souza 90855feb68SLuiz Otavio O Souza if (sc->sc_last_state == 1) 91855feb68SLuiz Otavio O Souza return; 92855feb68SLuiz Otavio O Souza 93855feb68SLuiz Otavio O Souza /* Enable the FIFO0 threshold and the end of sequence interrupt. */ 94855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_IRQENABLE_SET, 95651f7544SOleksandr Tymoshenko ADC_IRQ_FIFO0_THRES | ADC_IRQ_FIFO1_THRES | ADC_IRQ_END_OF_SEQ); 96855feb68SLuiz Otavio O Souza 97651f7544SOleksandr Tymoshenko reg = ADC_CTRL_STEP_WP | ADC_CTRL_STEP_ID; 98651f7544SOleksandr Tymoshenko if (sc->sc_tsc_wires > 0) { 99651f7544SOleksandr Tymoshenko reg |= ADC_CTRL_TSC_ENABLE; 100651f7544SOleksandr Tymoshenko switch (sc->sc_tsc_wires) { 101651f7544SOleksandr Tymoshenko case 4: 102651f7544SOleksandr Tymoshenko reg |= ADC_CTRL_TSC_4WIRE; 103651f7544SOleksandr Tymoshenko break; 104651f7544SOleksandr Tymoshenko case 5: 105651f7544SOleksandr Tymoshenko reg |= ADC_CTRL_TSC_5WIRE; 106651f7544SOleksandr Tymoshenko break; 107651f7544SOleksandr Tymoshenko case 8: 108651f7544SOleksandr Tymoshenko reg |= ADC_CTRL_TSC_8WIRE; 109651f7544SOleksandr Tymoshenko break; 110651f7544SOleksandr Tymoshenko default: 111651f7544SOleksandr Tymoshenko break; 112651f7544SOleksandr Tymoshenko } 113651f7544SOleksandr Tymoshenko } 114651f7544SOleksandr Tymoshenko reg |= ADC_CTRL_ENABLE; 115855feb68SLuiz Otavio O Souza /* Enable the ADC. Run thru enabled steps, start the conversions. */ 116651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_CTRL, reg); 117855feb68SLuiz Otavio O Souza 118855feb68SLuiz Otavio O Souza sc->sc_last_state = 1; 119855feb68SLuiz Otavio O Souza } 120855feb68SLuiz Otavio O Souza 121855feb68SLuiz Otavio O Souza static void 122855feb68SLuiz Otavio O Souza ti_adc_disable(struct ti_adc_softc *sc) 123855feb68SLuiz Otavio O Souza { 124855feb68SLuiz Otavio O Souza int count; 125855feb68SLuiz Otavio O Souza uint32_t data; 126855feb68SLuiz Otavio O Souza 127855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 128855feb68SLuiz Otavio O Souza 129855feb68SLuiz Otavio O Souza if (sc->sc_last_state == 0) 130855feb68SLuiz Otavio O Souza return; 131855feb68SLuiz Otavio O Souza 132855feb68SLuiz Otavio O Souza /* Disable all the enabled steps. */ 133855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_STEPENABLE, 0); 134855feb68SLuiz Otavio O Souza 135855feb68SLuiz Otavio O Souza /* Disable the ADC. */ 136855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_CTRL, ADC_READ4(sc, ADC_CTRL) & ~ADC_CTRL_ENABLE); 137855feb68SLuiz Otavio O Souza 138855feb68SLuiz Otavio O Souza /* Disable the FIFO0 threshold and the end of sequence interrupt. */ 139855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_IRQENABLE_CLR, 140651f7544SOleksandr Tymoshenko ADC_IRQ_FIFO0_THRES | ADC_IRQ_FIFO1_THRES | ADC_IRQ_END_OF_SEQ); 141855feb68SLuiz Otavio O Souza 142855feb68SLuiz Otavio O Souza /* ACK any pending interrupt. */ 143855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_IRQSTATUS, ADC_READ4(sc, ADC_IRQSTATUS)); 144855feb68SLuiz Otavio O Souza 145855feb68SLuiz Otavio O Souza /* Drain the FIFO data. */ 146855feb68SLuiz Otavio O Souza count = ADC_READ4(sc, ADC_FIFO0COUNT) & ADC_FIFO_COUNT_MSK; 147855feb68SLuiz Otavio O Souza while (count > 0) { 148855feb68SLuiz Otavio O Souza data = ADC_READ4(sc, ADC_FIFO0DATA); 149855feb68SLuiz Otavio O Souza count = ADC_READ4(sc, ADC_FIFO0COUNT) & ADC_FIFO_COUNT_MSK; 150855feb68SLuiz Otavio O Souza } 151855feb68SLuiz Otavio O Souza 152651f7544SOleksandr Tymoshenko count = ADC_READ4(sc, ADC_FIFO1COUNT) & ADC_FIFO_COUNT_MSK; 153651f7544SOleksandr Tymoshenko while (count > 0) { 154651f7544SOleksandr Tymoshenko data = ADC_READ4(sc, ADC_FIFO1DATA); 155651f7544SOleksandr Tymoshenko count = ADC_READ4(sc, ADC_FIFO1COUNT) & ADC_FIFO_COUNT_MSK; 156651f7544SOleksandr Tymoshenko } 157651f7544SOleksandr Tymoshenko 158855feb68SLuiz Otavio O Souza sc->sc_last_state = 0; 159855feb68SLuiz Otavio O Souza } 160855feb68SLuiz Otavio O Souza 161855feb68SLuiz Otavio O Souza static int 162855feb68SLuiz Otavio O Souza ti_adc_setup(struct ti_adc_softc *sc) 163855feb68SLuiz Otavio O Souza { 164651f7544SOleksandr Tymoshenko int ain, i; 165855feb68SLuiz Otavio O Souza uint32_t enabled; 166855feb68SLuiz Otavio O Souza 167855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 168855feb68SLuiz Otavio O Souza 169855feb68SLuiz Otavio O Souza /* Check for enabled inputs. */ 170651f7544SOleksandr Tymoshenko enabled = sc->sc_tsc_enabled; 171651f7544SOleksandr Tymoshenko for (i = 0; i < sc->sc_adc_nchannels; i++) { 172651f7544SOleksandr Tymoshenko ain = sc->sc_adc_channels[i]; 173855feb68SLuiz Otavio O Souza if (ti_adc_inputs[ain].enable) 174855feb68SLuiz Otavio O Souza enabled |= (1U << (ain + 1)); 175855feb68SLuiz Otavio O Souza } 176855feb68SLuiz Otavio O Souza 177855feb68SLuiz Otavio O Souza /* Set the ADC global status. */ 178855feb68SLuiz Otavio O Souza if (enabled != 0) { 179855feb68SLuiz Otavio O Souza ti_adc_enable(sc); 180855feb68SLuiz Otavio O Souza /* Update the enabled steps. */ 181855feb68SLuiz Otavio O Souza if (enabled != ADC_READ4(sc, ADC_STEPENABLE)) 182855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_STEPENABLE, enabled); 183855feb68SLuiz Otavio O Souza } else 184855feb68SLuiz Otavio O Souza ti_adc_disable(sc); 185855feb68SLuiz Otavio O Souza 186855feb68SLuiz Otavio O Souza return (0); 187855feb68SLuiz Otavio O Souza } 188855feb68SLuiz Otavio O Souza 189855feb68SLuiz Otavio O Souza static void 190855feb68SLuiz Otavio O Souza ti_adc_input_setup(struct ti_adc_softc *sc, int32_t ain) 191855feb68SLuiz Otavio O Souza { 192855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 193855feb68SLuiz Otavio O Souza uint32_t reg, val; 194855feb68SLuiz Otavio O Souza 195855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 196855feb68SLuiz Otavio O Souza 197855feb68SLuiz Otavio O Souza input = &ti_adc_inputs[ain]; 198855feb68SLuiz Otavio O Souza reg = input->stepconfig; 199855feb68SLuiz Otavio O Souza val = ADC_READ4(sc, reg); 200855feb68SLuiz Otavio O Souza 201855feb68SLuiz Otavio O Souza /* Set single ended operation. */ 202855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_DIFF_CNTRL; 203855feb68SLuiz Otavio O Souza 204855feb68SLuiz Otavio O Souza /* Set the negative voltage reference. */ 205855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_RFM_MSK; 206855feb68SLuiz Otavio O Souza 207855feb68SLuiz Otavio O Souza /* Set the positive voltage reference. */ 208855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_RFP_MSK; 209855feb68SLuiz Otavio O Souza 210855feb68SLuiz Otavio O Souza /* Set the samples average. */ 211855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_AVG_MSK; 212855feb68SLuiz Otavio O Souza val |= input->samples << ADC_STEP_AVG_SHIFT; 213855feb68SLuiz Otavio O Souza 214855feb68SLuiz Otavio O Souza /* Select the desired input. */ 215855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_INP_MSK; 216855feb68SLuiz Otavio O Souza val |= ain << ADC_STEP_INP_SHIFT; 217855feb68SLuiz Otavio O Souza 218855feb68SLuiz Otavio O Souza /* Set the ADC to one-shot mode. */ 219855feb68SLuiz Otavio O Souza val &= ~ADC_STEP_MODE_MSK; 220855feb68SLuiz Otavio O Souza 221855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, reg, val); 222855feb68SLuiz Otavio O Souza } 223855feb68SLuiz Otavio O Souza 224855feb68SLuiz Otavio O Souza static void 225855feb68SLuiz Otavio O Souza ti_adc_reset(struct ti_adc_softc *sc) 226855feb68SLuiz Otavio O Souza { 227651f7544SOleksandr Tymoshenko int ain, i; 228855feb68SLuiz Otavio O Souza 229855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 230855feb68SLuiz Otavio O Souza 231855feb68SLuiz Otavio O Souza /* Disable all the inputs. */ 232651f7544SOleksandr Tymoshenko for (i = 0; i < sc->sc_adc_nchannels; i++) { 233651f7544SOleksandr Tymoshenko ain = sc->sc_adc_channels[i]; 234855feb68SLuiz Otavio O Souza ti_adc_inputs[ain].enable = 0; 235855feb68SLuiz Otavio O Souza } 236651f7544SOleksandr Tymoshenko } 237855feb68SLuiz Otavio O Souza 238855feb68SLuiz Otavio O Souza static int 239855feb68SLuiz Otavio O Souza ti_adc_clockdiv_proc(SYSCTL_HANDLER_ARGS) 240855feb68SLuiz Otavio O Souza { 241855feb68SLuiz Otavio O Souza int error, reg; 242855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 243855feb68SLuiz Otavio O Souza 244855feb68SLuiz Otavio O Souza sc = (struct ti_adc_softc *)arg1; 245855feb68SLuiz Otavio O Souza 246855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 247855feb68SLuiz Otavio O Souza reg = (int)ADC_READ4(sc, ADC_CLKDIV) + 1; 248855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 249855feb68SLuiz Otavio O Souza 250855feb68SLuiz Otavio O Souza error = sysctl_handle_int(oidp, ®, sizeof(reg), req); 251855feb68SLuiz Otavio O Souza if (error != 0 || req->newptr == NULL) 252855feb68SLuiz Otavio O Souza return (error); 253855feb68SLuiz Otavio O Souza 254855feb68SLuiz Otavio O Souza /* 255855feb68SLuiz Otavio O Souza * The actual written value is the prescaler setting - 1. 256855feb68SLuiz Otavio O Souza * Enforce a minimum value of 10 (i.e. 9) which limits the maximum 257855feb68SLuiz Otavio O Souza * ADC clock to ~2.4Mhz (CLK_M_OSC / 10). 258855feb68SLuiz Otavio O Souza */ 259855feb68SLuiz Otavio O Souza reg--; 260855feb68SLuiz Otavio O Souza if (reg < 9) 261855feb68SLuiz Otavio O Souza reg = 9; 262855feb68SLuiz Otavio O Souza if (reg > USHRT_MAX) 263855feb68SLuiz Otavio O Souza reg = USHRT_MAX; 264855feb68SLuiz Otavio O Souza 265855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 266855feb68SLuiz Otavio O Souza /* Disable the ADC. */ 267855feb68SLuiz Otavio O Souza ti_adc_disable(sc); 268855feb68SLuiz Otavio O Souza /* Update the ADC prescaler setting. */ 269855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_CLKDIV, reg); 270855feb68SLuiz Otavio O Souza /* Enable the ADC again. */ 271855feb68SLuiz Otavio O Souza ti_adc_setup(sc); 272855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 273855feb68SLuiz Otavio O Souza 274855feb68SLuiz Otavio O Souza return (0); 275855feb68SLuiz Otavio O Souza } 276855feb68SLuiz Otavio O Souza 277855feb68SLuiz Otavio O Souza static int 278855feb68SLuiz Otavio O Souza ti_adc_enable_proc(SYSCTL_HANDLER_ARGS) 279855feb68SLuiz Otavio O Souza { 280855feb68SLuiz Otavio O Souza int error; 281855feb68SLuiz Otavio O Souza int32_t enable; 282855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 283855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 284855feb68SLuiz Otavio O Souza 285855feb68SLuiz Otavio O Souza input = (struct ti_adc_input *)arg1; 286855feb68SLuiz Otavio O Souza sc = input->sc; 287855feb68SLuiz Otavio O Souza 288855feb68SLuiz Otavio O Souza enable = input->enable; 289855feb68SLuiz Otavio O Souza error = sysctl_handle_int(oidp, &enable, sizeof(enable), 290855feb68SLuiz Otavio O Souza req); 291855feb68SLuiz Otavio O Souza if (error != 0 || req->newptr == NULL) 292855feb68SLuiz Otavio O Souza return (error); 293855feb68SLuiz Otavio O Souza 294855feb68SLuiz Otavio O Souza if (enable) 295855feb68SLuiz Otavio O Souza enable = 1; 296855feb68SLuiz Otavio O Souza 297855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 298855feb68SLuiz Otavio O Souza /* Setup the ADC as needed. */ 299855feb68SLuiz Otavio O Souza if (input->enable != enable) { 300855feb68SLuiz Otavio O Souza input->enable = enable; 301855feb68SLuiz Otavio O Souza ti_adc_setup(sc); 302855feb68SLuiz Otavio O Souza if (input->enable == 0) 303855feb68SLuiz Otavio O Souza input->value = 0; 304855feb68SLuiz Otavio O Souza } 305855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 306855feb68SLuiz Otavio O Souza 307855feb68SLuiz Otavio O Souza return (0); 308855feb68SLuiz Otavio O Souza } 309855feb68SLuiz Otavio O Souza 310855feb68SLuiz Otavio O Souza static int 311855feb68SLuiz Otavio O Souza ti_adc_open_delay_proc(SYSCTL_HANDLER_ARGS) 312855feb68SLuiz Otavio O Souza { 313855feb68SLuiz Otavio O Souza int error, reg; 314855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 315855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 316855feb68SLuiz Otavio O Souza 317855feb68SLuiz Otavio O Souza input = (struct ti_adc_input *)arg1; 318855feb68SLuiz Otavio O Souza sc = input->sc; 319855feb68SLuiz Otavio O Souza 320855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 321855feb68SLuiz Otavio O Souza reg = (int)ADC_READ4(sc, input->stepdelay) & ADC_STEP_OPEN_DELAY; 322855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 323855feb68SLuiz Otavio O Souza 324855feb68SLuiz Otavio O Souza error = sysctl_handle_int(oidp, ®, sizeof(reg), req); 325855feb68SLuiz Otavio O Souza if (error != 0 || req->newptr == NULL) 326855feb68SLuiz Otavio O Souza return (error); 327855feb68SLuiz Otavio O Souza 328855feb68SLuiz Otavio O Souza if (reg < 0) 329855feb68SLuiz Otavio O Souza reg = 0; 330855feb68SLuiz Otavio O Souza 331855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 332855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, input->stepdelay, reg & ADC_STEP_OPEN_DELAY); 333855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 334855feb68SLuiz Otavio O Souza 335855feb68SLuiz Otavio O Souza return (0); 336855feb68SLuiz Otavio O Souza } 337855feb68SLuiz Otavio O Souza 338855feb68SLuiz Otavio O Souza static int 339855feb68SLuiz Otavio O Souza ti_adc_samples_avg_proc(SYSCTL_HANDLER_ARGS) 340855feb68SLuiz Otavio O Souza { 341855feb68SLuiz Otavio O Souza int error, samples, i; 342855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 343855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 344855feb68SLuiz Otavio O Souza 345855feb68SLuiz Otavio O Souza input = (struct ti_adc_input *)arg1; 346855feb68SLuiz Otavio O Souza sc = input->sc; 347855feb68SLuiz Otavio O Souza 348855feb68SLuiz Otavio O Souza if (input->samples > nitems(ti_adc_samples)) 349855feb68SLuiz Otavio O Souza input->samples = nitems(ti_adc_samples); 350855feb68SLuiz Otavio O Souza samples = ti_adc_samples[input->samples]; 351855feb68SLuiz Otavio O Souza 352855feb68SLuiz Otavio O Souza error = sysctl_handle_int(oidp, &samples, 0, req); 353855feb68SLuiz Otavio O Souza if (error != 0 || req->newptr == NULL) 354855feb68SLuiz Otavio O Souza return (error); 355855feb68SLuiz Otavio O Souza 356855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 357855feb68SLuiz Otavio O Souza if (samples != ti_adc_samples[input->samples]) { 358855feb68SLuiz Otavio O Souza input->samples = 0; 359855feb68SLuiz Otavio O Souza for (i = 0; i < nitems(ti_adc_samples); i++) 360855feb68SLuiz Otavio O Souza if (samples >= ti_adc_samples[i]) 361855feb68SLuiz Otavio O Souza input->samples = i; 362855feb68SLuiz Otavio O Souza ti_adc_input_setup(sc, input->input); 363855feb68SLuiz Otavio O Souza } 364855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 365855feb68SLuiz Otavio O Souza 366855feb68SLuiz Otavio O Souza return (error); 367855feb68SLuiz Otavio O Souza } 368855feb68SLuiz Otavio O Souza 369855feb68SLuiz Otavio O Souza static void 370855feb68SLuiz Otavio O Souza ti_adc_read_data(struct ti_adc_softc *sc) 371855feb68SLuiz Otavio O Souza { 372855feb68SLuiz Otavio O Souza int count, ain; 373855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 374855feb68SLuiz Otavio O Souza uint32_t data; 375855feb68SLuiz Otavio O Souza 376855feb68SLuiz Otavio O Souza TI_ADC_LOCK_ASSERT(sc); 377855feb68SLuiz Otavio O Souza 378855feb68SLuiz Otavio O Souza /* Read the available data. */ 379855feb68SLuiz Otavio O Souza count = ADC_READ4(sc, ADC_FIFO0COUNT) & ADC_FIFO_COUNT_MSK; 380855feb68SLuiz Otavio O Souza while (count > 0) { 381855feb68SLuiz Otavio O Souza data = ADC_READ4(sc, ADC_FIFO0DATA); 382855feb68SLuiz Otavio O Souza ain = (data & ADC_FIFO_STEP_ID_MSK) >> ADC_FIFO_STEP_ID_SHIFT; 383855feb68SLuiz Otavio O Souza input = &ti_adc_inputs[ain]; 384855feb68SLuiz Otavio O Souza if (input->enable == 0) 385855feb68SLuiz Otavio O Souza input->value = 0; 386855feb68SLuiz Otavio O Souza else 387855feb68SLuiz Otavio O Souza input->value = (int32_t)(data & ADC_FIFO_DATA_MSK); 388855feb68SLuiz Otavio O Souza count = ADC_READ4(sc, ADC_FIFO0COUNT) & ADC_FIFO_COUNT_MSK; 389855feb68SLuiz Otavio O Souza } 390855feb68SLuiz Otavio O Souza } 391855feb68SLuiz Otavio O Souza 392651f7544SOleksandr Tymoshenko static int 393651f7544SOleksandr Tymoshenko cmp_values(const void *a, const void *b) 394651f7544SOleksandr Tymoshenko { 395651f7544SOleksandr Tymoshenko const uint32_t *v1, *v2; 396651f7544SOleksandr Tymoshenko v1 = a; 397651f7544SOleksandr Tymoshenko v2 = b; 398651f7544SOleksandr Tymoshenko if (*v1 < *v2) 399651f7544SOleksandr Tymoshenko return -1; 400651f7544SOleksandr Tymoshenko if (*v1 > *v2) 401651f7544SOleksandr Tymoshenko return 1; 402651f7544SOleksandr Tymoshenko 403651f7544SOleksandr Tymoshenko return (0); 404651f7544SOleksandr Tymoshenko } 405651f7544SOleksandr Tymoshenko 406651f7544SOleksandr Tymoshenko static void 407651f7544SOleksandr Tymoshenko ti_adc_tsc_read_data(struct ti_adc_softc *sc) 408651f7544SOleksandr Tymoshenko { 409651f7544SOleksandr Tymoshenko int count; 410651f7544SOleksandr Tymoshenko uint32_t data[16]; 411651f7544SOleksandr Tymoshenko uint32_t x, y; 412651f7544SOleksandr Tymoshenko int i, start, end; 413651f7544SOleksandr Tymoshenko 414651f7544SOleksandr Tymoshenko TI_ADC_LOCK_ASSERT(sc); 415651f7544SOleksandr Tymoshenko 416651f7544SOleksandr Tymoshenko /* Read the available data. */ 417651f7544SOleksandr Tymoshenko count = ADC_READ4(sc, ADC_FIFO1COUNT) & ADC_FIFO_COUNT_MSK; 418651f7544SOleksandr Tymoshenko if (count == 0) 419651f7544SOleksandr Tymoshenko return; 420651f7544SOleksandr Tymoshenko 421651f7544SOleksandr Tymoshenko i = 0; 422651f7544SOleksandr Tymoshenko while (count > 0) { 423651f7544SOleksandr Tymoshenko data[i++] = ADC_READ4(sc, ADC_FIFO1DATA) & ADC_FIFO_DATA_MSK; 424651f7544SOleksandr Tymoshenko count = ADC_READ4(sc, ADC_FIFO1COUNT) & ADC_FIFO_COUNT_MSK; 425651f7544SOleksandr Tymoshenko } 426651f7544SOleksandr Tymoshenko 427651f7544SOleksandr Tymoshenko if (sc->sc_coord_readouts > 3) { 428651f7544SOleksandr Tymoshenko start = 1; 429651f7544SOleksandr Tymoshenko end = sc->sc_coord_readouts - 1; 430651f7544SOleksandr Tymoshenko qsort(data, sc->sc_coord_readouts, 431651f7544SOleksandr Tymoshenko sizeof(data[0]), &cmp_values); 432651f7544SOleksandr Tymoshenko qsort(&data[sc->sc_coord_readouts + 2], 433651f7544SOleksandr Tymoshenko sc->sc_coord_readouts, 434651f7544SOleksandr Tymoshenko sizeof(data[0]), &cmp_values); 435651f7544SOleksandr Tymoshenko } 436651f7544SOleksandr Tymoshenko else { 437651f7544SOleksandr Tymoshenko start = 0; 438651f7544SOleksandr Tymoshenko end = sc->sc_coord_readouts; 439651f7544SOleksandr Tymoshenko } 440651f7544SOleksandr Tymoshenko 441651f7544SOleksandr Tymoshenko x = y = 0; 442651f7544SOleksandr Tymoshenko for (i = start; i < end; i++) 443651f7544SOleksandr Tymoshenko y += data[i]; 444651f7544SOleksandr Tymoshenko y /= (end - start); 445651f7544SOleksandr Tymoshenko 446651f7544SOleksandr Tymoshenko for (i = sc->sc_coord_readouts + 2 + start; i < sc->sc_coord_readouts + 2 + end; i++) 447651f7544SOleksandr Tymoshenko x += data[i]; 448651f7544SOleksandr Tymoshenko x /= (end - start); 449651f7544SOleksandr Tymoshenko 450651f7544SOleksandr Tymoshenko #ifdef DEBUG_TSC 451651f7544SOleksandr Tymoshenko device_printf(sc->sc_dev, "touchscreen x: %d, y: %d\n", x, y); 452651f7544SOleksandr Tymoshenko #endif 453651f7544SOleksandr Tymoshenko /* TODO: That's where actual event reporting should take place */ 454651f7544SOleksandr Tymoshenko } 455651f7544SOleksandr Tymoshenko 456651f7544SOleksandr Tymoshenko static void 457651f7544SOleksandr Tymoshenko ti_adc_intr_locked(struct ti_adc_softc *sc, uint32_t status) 458651f7544SOleksandr Tymoshenko { 459651f7544SOleksandr Tymoshenko /* Read the available data. */ 460651f7544SOleksandr Tymoshenko if (status & ADC_IRQ_FIFO0_THRES) 461651f7544SOleksandr Tymoshenko ti_adc_read_data(sc); 462651f7544SOleksandr Tymoshenko } 463651f7544SOleksandr Tymoshenko 464651f7544SOleksandr Tymoshenko static void 465651f7544SOleksandr Tymoshenko ti_adc_tsc_intr_locked(struct ti_adc_softc *sc, uint32_t status) 466651f7544SOleksandr Tymoshenko { 467651f7544SOleksandr Tymoshenko /* Read the available data. */ 468651f7544SOleksandr Tymoshenko if (status & ADC_IRQ_FIFO1_THRES) 469651f7544SOleksandr Tymoshenko ti_adc_tsc_read_data(sc); 470651f7544SOleksandr Tymoshenko 471651f7544SOleksandr Tymoshenko } 472651f7544SOleksandr Tymoshenko 473855feb68SLuiz Otavio O Souza static void 474855feb68SLuiz Otavio O Souza ti_adc_intr(void *arg) 475855feb68SLuiz Otavio O Souza { 476855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 477651f7544SOleksandr Tymoshenko uint32_t status, rawstatus; 478855feb68SLuiz Otavio O Souza 479855feb68SLuiz Otavio O Souza sc = (struct ti_adc_softc *)arg; 480855feb68SLuiz Otavio O Souza 481855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 482651f7544SOleksandr Tymoshenko 483651f7544SOleksandr Tymoshenko rawstatus = ADC_READ4(sc, ADC_IRQSTATUS_RAW); 484651f7544SOleksandr Tymoshenko status = ADC_READ4(sc, ADC_IRQSTATUS); 485651f7544SOleksandr Tymoshenko 486651f7544SOleksandr Tymoshenko if (rawstatus & ADC_IRQ_HW_PEN_ASYNC) { 487651f7544SOleksandr Tymoshenko sc->sc_pen_down = 1; 488651f7544SOleksandr Tymoshenko status |= ADC_IRQ_HW_PEN_ASYNC; 489651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_IRQENABLE_CLR, 490651f7544SOleksandr Tymoshenko ADC_IRQ_HW_PEN_ASYNC); 491651f7544SOleksandr Tymoshenko } 492651f7544SOleksandr Tymoshenko 493651f7544SOleksandr Tymoshenko if (rawstatus & ADC_IRQ_PEN_UP) { 494651f7544SOleksandr Tymoshenko sc->sc_pen_down = 0; 495651f7544SOleksandr Tymoshenko status |= ADC_IRQ_PEN_UP; 496651f7544SOleksandr Tymoshenko } 497651f7544SOleksandr Tymoshenko 498651f7544SOleksandr Tymoshenko if (status & ADC_IRQ_FIFO0_THRES) 499651f7544SOleksandr Tymoshenko ti_adc_intr_locked(sc, status); 500651f7544SOleksandr Tymoshenko 501651f7544SOleksandr Tymoshenko if (status & ADC_IRQ_FIFO1_THRES) 502651f7544SOleksandr Tymoshenko ti_adc_tsc_intr_locked(sc, status); 503651f7544SOleksandr Tymoshenko 504651f7544SOleksandr Tymoshenko if (status) { 505855feb68SLuiz Otavio O Souza /* ACK the interrupt. */ 506855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_IRQSTATUS, status); 507651f7544SOleksandr Tymoshenko } 508855feb68SLuiz Otavio O Souza 509855feb68SLuiz Otavio O Souza /* Start the next conversion ? */ 510855feb68SLuiz Otavio O Souza if (status & ADC_IRQ_END_OF_SEQ) 511855feb68SLuiz Otavio O Souza ti_adc_setup(sc); 512651f7544SOleksandr Tymoshenko 513855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 514855feb68SLuiz Otavio O Souza } 515855feb68SLuiz Otavio O Souza 516855feb68SLuiz Otavio O Souza static void 517855feb68SLuiz Otavio O Souza ti_adc_sysctl_init(struct ti_adc_softc *sc) 518855feb68SLuiz Otavio O Souza { 519855feb68SLuiz Otavio O Souza char pinbuf[3]; 520855feb68SLuiz Otavio O Souza struct sysctl_ctx_list *ctx; 521855feb68SLuiz Otavio O Souza struct sysctl_oid *tree_node, *inp_node, *inpN_node; 522855feb68SLuiz Otavio O Souza struct sysctl_oid_list *tree, *inp_tree, *inpN_tree; 523651f7544SOleksandr Tymoshenko int ain, i; 524855feb68SLuiz Otavio O Souza 525855feb68SLuiz Otavio O Souza /* 526855feb68SLuiz Otavio O Souza * Add per-pin sysctl tree/handlers. 527855feb68SLuiz Otavio O Souza */ 528855feb68SLuiz Otavio O Souza ctx = device_get_sysctl_ctx(sc->sc_dev); 529855feb68SLuiz Otavio O Souza tree_node = device_get_sysctl_tree(sc->sc_dev); 530855feb68SLuiz Otavio O Souza tree = SYSCTL_CHILDREN(tree_node); 531855feb68SLuiz Otavio O Souza SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "clockdiv", 532855feb68SLuiz Otavio O Souza CTLFLAG_RW | CTLTYPE_UINT, sc, 0, 533855feb68SLuiz Otavio O Souza ti_adc_clockdiv_proc, "IU", "ADC clock prescaler"); 534855feb68SLuiz Otavio O Souza inp_node = SYSCTL_ADD_NODE(ctx, tree, OID_AUTO, "ain", 535855feb68SLuiz Otavio O Souza CTLFLAG_RD, NULL, "ADC inputs"); 536855feb68SLuiz Otavio O Souza inp_tree = SYSCTL_CHILDREN(inp_node); 537855feb68SLuiz Otavio O Souza 538651f7544SOleksandr Tymoshenko for (i = 0; i < sc->sc_adc_nchannels; i++) { 539651f7544SOleksandr Tymoshenko ain = sc->sc_adc_channels[i]; 540855feb68SLuiz Otavio O Souza 541855feb68SLuiz Otavio O Souza snprintf(pinbuf, sizeof(pinbuf), "%d", ain); 542855feb68SLuiz Otavio O Souza inpN_node = SYSCTL_ADD_NODE(ctx, inp_tree, OID_AUTO, pinbuf, 543855feb68SLuiz Otavio O Souza CTLFLAG_RD, NULL, "ADC input"); 544855feb68SLuiz Otavio O Souza inpN_tree = SYSCTL_CHILDREN(inpN_node); 545855feb68SLuiz Otavio O Souza 546855feb68SLuiz Otavio O Souza SYSCTL_ADD_PROC(ctx, inpN_tree, OID_AUTO, "enable", 547855feb68SLuiz Otavio O Souza CTLFLAG_RW | CTLTYPE_UINT, &ti_adc_inputs[ain], 0, 548855feb68SLuiz Otavio O Souza ti_adc_enable_proc, "IU", "Enable ADC input"); 549855feb68SLuiz Otavio O Souza SYSCTL_ADD_PROC(ctx, inpN_tree, OID_AUTO, "open_delay", 550855feb68SLuiz Otavio O Souza CTLFLAG_RW | CTLTYPE_UINT, &ti_adc_inputs[ain], 0, 551855feb68SLuiz Otavio O Souza ti_adc_open_delay_proc, "IU", "ADC open delay"); 552855feb68SLuiz Otavio O Souza SYSCTL_ADD_PROC(ctx, inpN_tree, OID_AUTO, "samples_avg", 553855feb68SLuiz Otavio O Souza CTLFLAG_RW | CTLTYPE_UINT, &ti_adc_inputs[ain], 0, 554855feb68SLuiz Otavio O Souza ti_adc_samples_avg_proc, "IU", "ADC samples average"); 555855feb68SLuiz Otavio O Souza SYSCTL_ADD_INT(ctx, inpN_tree, OID_AUTO, "input", 556855feb68SLuiz Otavio O Souza CTLFLAG_RD, &ti_adc_inputs[ain].value, 0, 557855feb68SLuiz Otavio O Souza "Converted raw value for the ADC input"); 558855feb68SLuiz Otavio O Souza } 559855feb68SLuiz Otavio O Souza } 560855feb68SLuiz Otavio O Souza 561855feb68SLuiz Otavio O Souza static void 562855feb68SLuiz Otavio O Souza ti_adc_inputs_init(struct ti_adc_softc *sc) 563855feb68SLuiz Otavio O Souza { 564651f7544SOleksandr Tymoshenko int ain, i; 565855feb68SLuiz Otavio O Souza struct ti_adc_input *input; 566855feb68SLuiz Otavio O Souza 567855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 568651f7544SOleksandr Tymoshenko for (i = 0; i < sc->sc_adc_nchannels; i++) { 569651f7544SOleksandr Tymoshenko ain = sc->sc_adc_channels[i]; 570855feb68SLuiz Otavio O Souza input = &ti_adc_inputs[ain]; 571855feb68SLuiz Otavio O Souza input->sc = sc; 572855feb68SLuiz Otavio O Souza input->input = ain; 573855feb68SLuiz Otavio O Souza input->value = 0; 574855feb68SLuiz Otavio O Souza input->enable = 0; 575855feb68SLuiz Otavio O Souza input->samples = 0; 576855feb68SLuiz Otavio O Souza ti_adc_input_setup(sc, ain); 577855feb68SLuiz Otavio O Souza } 578855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 579855feb68SLuiz Otavio O Souza } 580855feb68SLuiz Otavio O Souza 581855feb68SLuiz Otavio O Souza static void 582651f7544SOleksandr Tymoshenko ti_adc_tsc_init(struct ti_adc_softc *sc) 583651f7544SOleksandr Tymoshenko { 584651f7544SOleksandr Tymoshenko int i, start_step, end_step; 585651f7544SOleksandr Tymoshenko uint32_t stepconfig, val; 586651f7544SOleksandr Tymoshenko 587651f7544SOleksandr Tymoshenko TI_ADC_LOCK(sc); 588651f7544SOleksandr Tymoshenko 589651f7544SOleksandr Tymoshenko /* X coordinates */ 590651f7544SOleksandr Tymoshenko stepconfig = ADC_STEP_FIFO1 | (4 << ADC_STEP_AVG_SHIFT) | 591651f7544SOleksandr Tymoshenko ADC_STEP_MODE_HW_ONESHOT | sc->sc_xp_bit; 592651f7544SOleksandr Tymoshenko if (sc->sc_tsc_wires == 4) 593651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(sc->sc_yp_inp) | sc->sc_xn_bit; 594651f7544SOleksandr Tymoshenko else if (sc->sc_tsc_wires == 5) 595651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(4) | 596651f7544SOleksandr Tymoshenko sc->sc_xn_bit | sc->sc_yn_bit | sc->sc_yp_bit; 597651f7544SOleksandr Tymoshenko else if (sc->sc_tsc_wires == 8) 598651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(sc->sc_yp_inp) | sc->sc_xn_bit; 599651f7544SOleksandr Tymoshenko 600651f7544SOleksandr Tymoshenko start_step = ADC_STEPS - sc->sc_coord_readouts + 1; 601651f7544SOleksandr Tymoshenko end_step = start_step + sc->sc_coord_readouts - 1; 602651f7544SOleksandr Tymoshenko for (i = start_step; i <= end_step; i++) { 603651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPCFG(i), stepconfig); 604651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPDLY(i), STEPDLY_OPEN); 605651f7544SOleksandr Tymoshenko } 606651f7544SOleksandr Tymoshenko 607651f7544SOleksandr Tymoshenko /* Y coordinates */ 608651f7544SOleksandr Tymoshenko stepconfig = ADC_STEP_FIFO1 | (4 << ADC_STEP_AVG_SHIFT) | 609651f7544SOleksandr Tymoshenko ADC_STEP_MODE_HW_ONESHOT | sc->sc_yn_bit | 610651f7544SOleksandr Tymoshenko ADC_STEP_INM(8); 611651f7544SOleksandr Tymoshenko if (sc->sc_tsc_wires == 4) 612651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(sc->sc_xp_inp) | sc->sc_yp_bit; 613651f7544SOleksandr Tymoshenko else if (sc->sc_tsc_wires == 5) 614651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(4) | 615651f7544SOleksandr Tymoshenko sc->sc_xp_bit | sc->sc_xn_bit | sc->sc_yp_bit; 616651f7544SOleksandr Tymoshenko else if (sc->sc_tsc_wires == 8) 617651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(sc->sc_xp_inp) | sc->sc_yp_bit; 618651f7544SOleksandr Tymoshenko 619651f7544SOleksandr Tymoshenko start_step = ADC_STEPS - (sc->sc_coord_readouts*2 + 2) + 1; 620651f7544SOleksandr Tymoshenko end_step = start_step + sc->sc_coord_readouts - 1; 621651f7544SOleksandr Tymoshenko for (i = start_step; i <= end_step; i++) { 622651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPCFG(i), stepconfig); 623651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPDLY(i), STEPDLY_OPEN); 624651f7544SOleksandr Tymoshenko } 625651f7544SOleksandr Tymoshenko 626651f7544SOleksandr Tymoshenko /* Charge config */ 627651f7544SOleksandr Tymoshenko val = ADC_READ4(sc, ADC_IDLECONFIG); 628651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_TC_CHARGE_STEPCONFIG, val); 629651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_TC_CHARGE_DELAY, sc->sc_charge_delay); 630651f7544SOleksandr Tymoshenko 631651f7544SOleksandr Tymoshenko /* 2 steps for Z */ 632651f7544SOleksandr Tymoshenko start_step = ADC_STEPS - (sc->sc_coord_readouts + 2) + 1; 633651f7544SOleksandr Tymoshenko stepconfig = ADC_STEP_FIFO1 | (4 << ADC_STEP_AVG_SHIFT) | 634651f7544SOleksandr Tymoshenko ADC_STEP_MODE_HW_ONESHOT | sc->sc_yp_bit | 635651f7544SOleksandr Tymoshenko sc->sc_xn_bit | ADC_STEP_INP(sc->sc_xp_inp) | 636651f7544SOleksandr Tymoshenko ADC_STEP_INM(8); 637651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPCFG(start_step), stepconfig); 638651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPDLY(start_step), STEPDLY_OPEN); 639651f7544SOleksandr Tymoshenko start_step++; 640651f7544SOleksandr Tymoshenko stepconfig |= ADC_STEP_INP(sc->sc_yn_inp); 641651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPCFG(start_step), stepconfig); 642651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_STEPDLY(start_step), STEPDLY_OPEN); 643651f7544SOleksandr Tymoshenko 644651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_FIFO1THRESHOLD, (sc->sc_coord_readouts*2 + 2) - 1); 645651f7544SOleksandr Tymoshenko 646651f7544SOleksandr Tymoshenko sc->sc_tsc_enabled = 1; 647651f7544SOleksandr Tymoshenko start_step = ADC_STEPS - (sc->sc_coord_readouts*2 + 2) + 1; 648651f7544SOleksandr Tymoshenko end_step = ADC_STEPS; 649651f7544SOleksandr Tymoshenko for (i = start_step; i <= end_step; i++) { 650651f7544SOleksandr Tymoshenko sc->sc_tsc_enabled |= (1 << i); 651651f7544SOleksandr Tymoshenko } 652651f7544SOleksandr Tymoshenko 653651f7544SOleksandr Tymoshenko 654651f7544SOleksandr Tymoshenko TI_ADC_UNLOCK(sc); 655651f7544SOleksandr Tymoshenko } 656651f7544SOleksandr Tymoshenko 657651f7544SOleksandr Tymoshenko static void 658855feb68SLuiz Otavio O Souza ti_adc_idlestep_init(struct ti_adc_softc *sc) 659855feb68SLuiz Otavio O Souza { 660855feb68SLuiz Otavio O Souza uint32_t val; 661855feb68SLuiz Otavio O Souza 662651f7544SOleksandr Tymoshenko val = ADC_STEP_YNN_SW | ADC_STEP_INM(8) | ADC_STEP_INP(8) | ADC_STEP_YPN_SW; 663855feb68SLuiz Otavio O Souza 664855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_IDLECONFIG, val); 665855feb68SLuiz Otavio O Souza } 666855feb68SLuiz Otavio O Souza 667855feb68SLuiz Otavio O Souza static int 668651f7544SOleksandr Tymoshenko ti_adc_config_wires(struct ti_adc_softc *sc, int *wire_configs, int nwire_configs) 669651f7544SOleksandr Tymoshenko { 670651f7544SOleksandr Tymoshenko int i; 671651f7544SOleksandr Tymoshenko int wire, ai; 672651f7544SOleksandr Tymoshenko 673651f7544SOleksandr Tymoshenko for (i = 0; i < nwire_configs; i++) { 674651f7544SOleksandr Tymoshenko wire = wire_configs[i] & 0xf; 675651f7544SOleksandr Tymoshenko ai = (wire_configs[i] >> 4) & 0xf; 676651f7544SOleksandr Tymoshenko switch (wire) { 677651f7544SOleksandr Tymoshenko case ORDER_XP: 678651f7544SOleksandr Tymoshenko sc->sc_xp_bit = ADC_STEP_XPP_SW; 679651f7544SOleksandr Tymoshenko sc->sc_xp_inp = ai; 680651f7544SOleksandr Tymoshenko break; 681651f7544SOleksandr Tymoshenko case ORDER_XN: 682651f7544SOleksandr Tymoshenko sc->sc_xn_bit = ADC_STEP_XNN_SW; 683651f7544SOleksandr Tymoshenko sc->sc_xn_inp = ai; 684651f7544SOleksandr Tymoshenko break; 685651f7544SOleksandr Tymoshenko case ORDER_YP: 686651f7544SOleksandr Tymoshenko sc->sc_yp_bit = ADC_STEP_YPP_SW; 687651f7544SOleksandr Tymoshenko sc->sc_yp_inp = ai; 688651f7544SOleksandr Tymoshenko break; 689651f7544SOleksandr Tymoshenko case ORDER_YN: 690651f7544SOleksandr Tymoshenko sc->sc_yn_bit = ADC_STEP_YNN_SW; 691651f7544SOleksandr Tymoshenko sc->sc_yn_inp = ai; 692651f7544SOleksandr Tymoshenko break; 693651f7544SOleksandr Tymoshenko default: 694651f7544SOleksandr Tymoshenko device_printf(sc->sc_dev, "Invalid wire config\n"); 695651f7544SOleksandr Tymoshenko return (-1); 696651f7544SOleksandr Tymoshenko } 697651f7544SOleksandr Tymoshenko } 698651f7544SOleksandr Tymoshenko return (0); 699651f7544SOleksandr Tymoshenko } 700651f7544SOleksandr Tymoshenko 701651f7544SOleksandr Tymoshenko static int 702855feb68SLuiz Otavio O Souza ti_adc_probe(device_t dev) 703855feb68SLuiz Otavio O Souza { 704855feb68SLuiz Otavio O Souza 7055b03aba6SOleksandr Tymoshenko if (!ofw_bus_is_compatible(dev, "ti,am3359-tscadc")) 706855feb68SLuiz Otavio O Souza return (ENXIO); 707855feb68SLuiz Otavio O Souza device_set_desc(dev, "TI ADC controller"); 708855feb68SLuiz Otavio O Souza 709855feb68SLuiz Otavio O Souza return (BUS_PROBE_DEFAULT); 710855feb68SLuiz Otavio O Souza } 711855feb68SLuiz Otavio O Souza 712855feb68SLuiz Otavio O Souza static int 713855feb68SLuiz Otavio O Souza ti_adc_attach(device_t dev) 714855feb68SLuiz Otavio O Souza { 715651f7544SOleksandr Tymoshenko int err, rid, i; 716855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 717651f7544SOleksandr Tymoshenko uint32_t rev, reg; 718651f7544SOleksandr Tymoshenko phandle_t node, child; 719651f7544SOleksandr Tymoshenko pcell_t cell; 720651f7544SOleksandr Tymoshenko int *channels; 721651f7544SOleksandr Tymoshenko int nwire_configs; 722651f7544SOleksandr Tymoshenko int *wire_configs; 723855feb68SLuiz Otavio O Souza 724855feb68SLuiz Otavio O Souza sc = device_get_softc(dev); 725855feb68SLuiz Otavio O Souza sc->sc_dev = dev; 726855feb68SLuiz Otavio O Souza 727651f7544SOleksandr Tymoshenko node = ofw_bus_get_node(dev); 728651f7544SOleksandr Tymoshenko 729651f7544SOleksandr Tymoshenko sc->sc_tsc_wires = 0; 730651f7544SOleksandr Tymoshenko sc->sc_coord_readouts = 1; 731651f7544SOleksandr Tymoshenko sc->sc_x_plate_resistance = 0; 732651f7544SOleksandr Tymoshenko sc->sc_charge_delay = DEFAULT_CHARGE_DELAY; 733651f7544SOleksandr Tymoshenko /* Read "tsc" node properties */ 734651f7544SOleksandr Tymoshenko child = ofw_bus_find_child(node, "tsc"); 735651f7544SOleksandr Tymoshenko if (child != 0) { 736651f7544SOleksandr Tymoshenko if ((OF_getprop(child, "ti,wires", &cell, sizeof(cell))) > 0) 737651f7544SOleksandr Tymoshenko sc->sc_tsc_wires = fdt32_to_cpu(cell); 738651f7544SOleksandr Tymoshenko if ((OF_getprop(child, "ti,coordinate-readouts", &cell, sizeof(cell))) > 0) 739651f7544SOleksandr Tymoshenko sc->sc_coord_readouts = fdt32_to_cpu(cell); 740651f7544SOleksandr Tymoshenko if ((OF_getprop(child, "ti,x-plate-resistance", &cell, sizeof(cell))) > 0) 741651f7544SOleksandr Tymoshenko sc->sc_x_plate_resistance = fdt32_to_cpu(cell); 742651f7544SOleksandr Tymoshenko if ((OF_getprop(child, "ti,charge-delay", &cell, sizeof(cell))) > 0) 743651f7544SOleksandr Tymoshenko sc->sc_charge_delay = fdt32_to_cpu(cell); 744651f7544SOleksandr Tymoshenko nwire_configs = OF_getencprop_alloc(child, "ti,wire-config", 745651f7544SOleksandr Tymoshenko sizeof(*wire_configs), (void **)&wire_configs); 746651f7544SOleksandr Tymoshenko if (nwire_configs != sc->sc_tsc_wires) { 747651f7544SOleksandr Tymoshenko device_printf(sc->sc_dev, 748651f7544SOleksandr Tymoshenko "invalid nubmer of ti,wire-config: %d (should be %d)\n", 749651f7544SOleksandr Tymoshenko nwire_configs, sc->sc_tsc_wires); 750bc90a48cSOleksandr Tymoshenko OF_prop_free(wire_configs); 751651f7544SOleksandr Tymoshenko return (EINVAL); 752651f7544SOleksandr Tymoshenko } 753651f7544SOleksandr Tymoshenko err = ti_adc_config_wires(sc, wire_configs, nwire_configs); 754bc90a48cSOleksandr Tymoshenko OF_prop_free(wire_configs); 755e5ee119aSLuiz Otavio O Souza if (err) 756651f7544SOleksandr Tymoshenko return (EINVAL); 757651f7544SOleksandr Tymoshenko } 758651f7544SOleksandr Tymoshenko 759651f7544SOleksandr Tymoshenko /* Read "adc" node properties */ 760651f7544SOleksandr Tymoshenko child = ofw_bus_find_child(node, "adc"); 761651f7544SOleksandr Tymoshenko if (child != 0) { 762651f7544SOleksandr Tymoshenko sc->sc_adc_nchannels = OF_getencprop_alloc(child, "ti,adc-channels", 763651f7544SOleksandr Tymoshenko sizeof(*channels), (void **)&channels); 764651f7544SOleksandr Tymoshenko if (sc->sc_adc_nchannels > 0) { 765651f7544SOleksandr Tymoshenko for (i = 0; i < sc->sc_adc_nchannels; i++) 766651f7544SOleksandr Tymoshenko sc->sc_adc_channels[i] = channels[i]; 767bc90a48cSOleksandr Tymoshenko OF_prop_free(channels); 768651f7544SOleksandr Tymoshenko } 769651f7544SOleksandr Tymoshenko } 770651f7544SOleksandr Tymoshenko 771651f7544SOleksandr Tymoshenko /* Sanity check FDT data */ 772651f7544SOleksandr Tymoshenko if (sc->sc_tsc_wires + sc->sc_adc_nchannels > TI_ADC_NPINS) { 773651f7544SOleksandr Tymoshenko device_printf(dev, "total number of chanels (%d) is larger than %d\n", 774651f7544SOleksandr Tymoshenko sc->sc_tsc_wires + sc->sc_adc_nchannels, TI_ADC_NPINS); 775651f7544SOleksandr Tymoshenko return (ENXIO); 776651f7544SOleksandr Tymoshenko } 777e5ee119aSLuiz Otavio O Souza 778855feb68SLuiz Otavio O Souza rid = 0; 779855feb68SLuiz Otavio O Souza sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 780855feb68SLuiz Otavio O Souza RF_ACTIVE); 781855feb68SLuiz Otavio O Souza if (!sc->sc_mem_res) { 782855feb68SLuiz Otavio O Souza device_printf(dev, "cannot allocate memory window\n"); 783855feb68SLuiz Otavio O Souza return (ENXIO); 784855feb68SLuiz Otavio O Souza } 785855feb68SLuiz Otavio O Souza 786651f7544SOleksandr Tymoshenko /* Activate the ADC_TSC module. */ 787651f7544SOleksandr Tymoshenko err = ti_prcm_clk_enable(TSC_ADC_CLK); 788651f7544SOleksandr Tymoshenko if (err) 789651f7544SOleksandr Tymoshenko return (err); 790651f7544SOleksandr Tymoshenko 791855feb68SLuiz Otavio O Souza rid = 0; 792855feb68SLuiz Otavio O Souza sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 793855feb68SLuiz Otavio O Souza RF_ACTIVE); 794855feb68SLuiz Otavio O Souza if (!sc->sc_irq_res) { 795855feb68SLuiz Otavio O Souza bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 796855feb68SLuiz Otavio O Souza device_printf(dev, "cannot allocate interrupt\n"); 797855feb68SLuiz Otavio O Souza return (ENXIO); 798855feb68SLuiz Otavio O Souza } 799855feb68SLuiz Otavio O Souza 800855feb68SLuiz Otavio O Souza if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 801855feb68SLuiz Otavio O Souza NULL, ti_adc_intr, sc, &sc->sc_intrhand) != 0) { 802855feb68SLuiz Otavio O Souza bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); 803855feb68SLuiz Otavio O Souza bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 804855feb68SLuiz Otavio O Souza device_printf(dev, "Unable to setup the irq handler.\n"); 805855feb68SLuiz Otavio O Souza return (ENXIO); 806855feb68SLuiz Otavio O Souza } 807855feb68SLuiz Otavio O Souza 808855feb68SLuiz Otavio O Souza /* Check the ADC revision. */ 809855feb68SLuiz Otavio O Souza rev = ADC_READ4(sc, ADC_REVISION); 810855feb68SLuiz Otavio O Souza device_printf(dev, 811855feb68SLuiz Otavio O Souza "scheme: %#x func: %#x rtl: %d rev: %d.%d custom rev: %d\n", 812855feb68SLuiz Otavio O Souza (rev & ADC_REV_SCHEME_MSK) >> ADC_REV_SCHEME_SHIFT, 813855feb68SLuiz Otavio O Souza (rev & ADC_REV_FUNC_MSK) >> ADC_REV_FUNC_SHIFT, 814855feb68SLuiz Otavio O Souza (rev & ADC_REV_RTL_MSK) >> ADC_REV_RTL_SHIFT, 815855feb68SLuiz Otavio O Souza (rev & ADC_REV_MAJOR_MSK) >> ADC_REV_MAJOR_SHIFT, 816855feb68SLuiz Otavio O Souza rev & ADC_REV_MINOR_MSK, 817855feb68SLuiz Otavio O Souza (rev & ADC_REV_CUSTOM_MSK) >> ADC_REV_CUSTOM_SHIFT); 818855feb68SLuiz Otavio O Souza 819855feb68SLuiz Otavio O Souza reg = ADC_READ4(sc, ADC_CTRL); 820855feb68SLuiz Otavio O Souza ADC_WRITE4(sc, ADC_CTRL, reg | ADC_CTRL_STEP_WP | ADC_CTRL_STEP_ID); 821855feb68SLuiz Otavio O Souza 822855feb68SLuiz Otavio O Souza /* 823651f7544SOleksandr Tymoshenko * Set the ADC prescaler to 2400 if touchscreen is not enabled 824651f7544SOleksandr Tymoshenko * and to 24 if it is. This sets the ADC clock to ~10Khz and 825651f7544SOleksandr Tymoshenko * ~1Mhz respectively (CLK_M_OSC / prescaler). 826855feb68SLuiz Otavio O Souza */ 827651f7544SOleksandr Tymoshenko if (sc->sc_tsc_wires) 828651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_CLKDIV, 24 - 1); 829651f7544SOleksandr Tymoshenko else 830651f7544SOleksandr Tymoshenko ADC_WRITE4(sc, ADC_CLKDIV, 2400 - 1); 831855feb68SLuiz Otavio O Souza 832855feb68SLuiz Otavio O Souza TI_ADC_LOCK_INIT(sc); 833855feb68SLuiz Otavio O Souza 834855feb68SLuiz Otavio O Souza ti_adc_idlestep_init(sc); 835855feb68SLuiz Otavio O Souza ti_adc_inputs_init(sc); 836855feb68SLuiz Otavio O Souza ti_adc_sysctl_init(sc); 837651f7544SOleksandr Tymoshenko ti_adc_tsc_init(sc); 838651f7544SOleksandr Tymoshenko 839651f7544SOleksandr Tymoshenko TI_ADC_LOCK(sc); 840651f7544SOleksandr Tymoshenko ti_adc_setup(sc); 841651f7544SOleksandr Tymoshenko TI_ADC_UNLOCK(sc); 842855feb68SLuiz Otavio O Souza 843855feb68SLuiz Otavio O Souza return (0); 844855feb68SLuiz Otavio O Souza } 845855feb68SLuiz Otavio O Souza 846855feb68SLuiz Otavio O Souza static int 847855feb68SLuiz Otavio O Souza ti_adc_detach(device_t dev) 848855feb68SLuiz Otavio O Souza { 849855feb68SLuiz Otavio O Souza struct ti_adc_softc *sc; 850855feb68SLuiz Otavio O Souza 851855feb68SLuiz Otavio O Souza sc = device_get_softc(dev); 852855feb68SLuiz Otavio O Souza 853855feb68SLuiz Otavio O Souza /* Turn off the ADC. */ 854855feb68SLuiz Otavio O Souza TI_ADC_LOCK(sc); 855855feb68SLuiz Otavio O Souza ti_adc_reset(sc); 856855feb68SLuiz Otavio O Souza ti_adc_setup(sc); 857855feb68SLuiz Otavio O Souza TI_ADC_UNLOCK(sc); 858855feb68SLuiz Otavio O Souza 859855feb68SLuiz Otavio O Souza TI_ADC_LOCK_DESTROY(sc); 860855feb68SLuiz Otavio O Souza 861855feb68SLuiz Otavio O Souza if (sc->sc_intrhand) 862855feb68SLuiz Otavio O Souza bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intrhand); 863855feb68SLuiz Otavio O Souza if (sc->sc_irq_res) 864855feb68SLuiz Otavio O Souza bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); 865855feb68SLuiz Otavio O Souza if (sc->sc_mem_res) 866855feb68SLuiz Otavio O Souza bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 867855feb68SLuiz Otavio O Souza 868855feb68SLuiz Otavio O Souza return (bus_generic_detach(dev)); 869855feb68SLuiz Otavio O Souza } 870855feb68SLuiz Otavio O Souza 871855feb68SLuiz Otavio O Souza static device_method_t ti_adc_methods[] = { 872855feb68SLuiz Otavio O Souza DEVMETHOD(device_probe, ti_adc_probe), 873855feb68SLuiz Otavio O Souza DEVMETHOD(device_attach, ti_adc_attach), 874855feb68SLuiz Otavio O Souza DEVMETHOD(device_detach, ti_adc_detach), 875855feb68SLuiz Otavio O Souza 876855feb68SLuiz Otavio O Souza DEVMETHOD_END 877855feb68SLuiz Otavio O Souza }; 878855feb68SLuiz Otavio O Souza 879855feb68SLuiz Otavio O Souza static driver_t ti_adc_driver = { 880855feb68SLuiz Otavio O Souza "ti_adc", 881855feb68SLuiz Otavio O Souza ti_adc_methods, 882855feb68SLuiz Otavio O Souza sizeof(struct ti_adc_softc), 883855feb68SLuiz Otavio O Souza }; 884855feb68SLuiz Otavio O Souza 885855feb68SLuiz Otavio O Souza static devclass_t ti_adc_devclass; 886855feb68SLuiz Otavio O Souza 887855feb68SLuiz Otavio O Souza DRIVER_MODULE(ti_adc, simplebus, ti_adc_driver, ti_adc_devclass, 0, 0); 888855feb68SLuiz Otavio O Souza MODULE_VERSION(ti_adc, 1); 889855feb68SLuiz Otavio O Souza MODULE_DEPEND(ti_adc, simplebus, 1, 1, 1); 890