Lines Matching +full:cd +full:- +full:inverted
1 // SPDX-License-Identifier: GPL-2.0-only
6 * Copyright (C) 2007-2008 Pierre Ossman
25 #include <linux/mmc/slot-gpio.h>
29 #include "slot-gpio.h"
40 wakeup_source_unregister(host->ws); in mmc_host_classdev_release()
41 ida_simple_remove(&mmc_host_ida, host->index); in mmc_host_classdev_release()
62 host->can_retune = 1; in mmc_retune_enable()
63 if (host->retune_period) in mmc_retune_enable()
64 mod_timer(&host->retune_timer, in mmc_retune_enable()
65 jiffies + host->retune_period * HZ); in mmc_retune_enable()
69 * Pause re-tuning for a small set of operations. The pause begins after the
70 * next command and after first doing re-tuning.
74 if (!host->retune_paused) { in mmc_retune_pause()
75 host->retune_paused = 1; in mmc_retune_pause()
84 if (host->retune_paused) { in mmc_retune_unpause()
85 host->retune_paused = 0; in mmc_retune_unpause()
94 host->can_retune = 0; in mmc_retune_disable()
95 del_timer_sync(&host->retune_timer); in mmc_retune_disable()
96 host->retune_now = 0; in mmc_retune_disable()
97 host->need_retune = 0; in mmc_retune_disable()
102 del_timer_sync(&host->retune_timer); in mmc_retune_timer_stop()
108 if (!host->hold_retune) in mmc_retune_hold()
109 host->retune_now = 1; in mmc_retune_hold()
110 host->hold_retune += 1; in mmc_retune_hold()
115 if (host->hold_retune) in mmc_retune_release()
116 host->hold_retune -= 1; in mmc_retune_release()
127 if (host->retune_now) in mmc_retune()
128 host->retune_now = 0; in mmc_retune()
132 if (!host->need_retune || host->doing_retune || !host->card) in mmc_retune()
135 host->need_retune = 0; in mmc_retune()
137 host->doing_retune = 1; in mmc_retune()
139 if (host->ios.timing == MMC_TIMING_MMC_HS400) { in mmc_retune()
140 err = mmc_hs400_to_hs200(host->card); in mmc_retune()
147 err = mmc_execute_tuning(host->card); in mmc_retune()
152 err = mmc_hs200_to_hs400(host->card); in mmc_retune()
154 host->doing_retune = 0; in mmc_retune()
167 * mmc_of_parse() - parse host's device-tree node
172 * parse the properties and set respective generic mmc-host flags and
177 struct device *dev = host->parent; in mmc_of_parse()
184 /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ in mmc_of_parse()
185 if (device_property_read_u32(dev, "bus-width", &bus_width) < 0) { in mmc_of_parse()
186 dev_dbg(host->parent, in mmc_of_parse()
187 "\"bus-width\" property is missing, assuming 1 bit.\n"); in mmc_of_parse()
193 host->caps |= MMC_CAP_8_BIT_DATA; in mmc_of_parse()
194 fallthrough; /* Hosts capable of 8-bit can also do 4 bits */ in mmc_of_parse()
196 host->caps |= MMC_CAP_4_BIT_DATA; in mmc_of_parse()
201 dev_err(host->parent, in mmc_of_parse()
202 "Invalid \"bus-width\" value %u!\n", bus_width); in mmc_of_parse()
203 return -EINVAL; in mmc_of_parse()
206 /* f_max is obtained from the optional "max-frequency" property */ in mmc_of_parse()
207 device_property_read_u32(dev, "max-frequency", &host->f_max); in mmc_of_parse()
210 * Configure CD and WP pins. They are both by default active low to in mmc_of_parse()
211 * match the SDHCI spec. If GPIOs are provided for CD and / or WP, the in mmc_of_parse()
212 * mmc-gpio helpers are used to attach, configure and use them. If in mmc_of_parse()
214 * and MMC_CAP2_RO_ACTIVE_HIGH capability-2 flags is set. If the in mmc_of_parse()
215 * "broken-cd" property is provided, the MMC_CAP_NEEDS_POLL capability in mmc_of_parse()
216 * is set. If the "non-removable" property is found, the in mmc_of_parse()
217 * MMC_CAP_NONREMOVABLE capability is set and no card-detection in mmc_of_parse()
223 if (device_property_read_bool(dev, "non-removable")) { in mmc_of_parse()
224 host->caps |= MMC_CAP_NONREMOVABLE; in mmc_of_parse()
226 if (device_property_read_bool(dev, "cd-inverted")) in mmc_of_parse()
227 host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH; in mmc_of_parse()
229 if (device_property_read_u32(dev, "cd-debounce-delay-ms", in mmc_of_parse()
233 if (device_property_read_bool(dev, "broken-cd")) in mmc_of_parse()
234 host->caps |= MMC_CAP_NEEDS_POLL; in mmc_of_parse()
236 ret = mmc_gpiod_request_cd(host, "cd", 0, false, in mmc_of_parse()
239 dev_info(host->parent, "Got CD GPIO\n"); in mmc_of_parse()
240 else if (ret != -ENOENT && ret != -ENOSYS) in mmc_of_parse()
246 if (device_property_read_bool(dev, "wp-inverted")) in mmc_of_parse()
247 host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; in mmc_of_parse()
251 dev_info(host->parent, "Got WP GPIO\n"); in mmc_of_parse()
252 else if (ret != -ENOENT && ret != -ENOSYS) in mmc_of_parse()
255 if (device_property_read_bool(dev, "disable-wp")) in mmc_of_parse()
256 host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; in mmc_of_parse()
258 if (device_property_read_bool(dev, "cap-sd-highspeed")) in mmc_of_parse()
259 host->caps |= MMC_CAP_SD_HIGHSPEED; in mmc_of_parse()
260 if (device_property_read_bool(dev, "cap-mmc-highspeed")) in mmc_of_parse()
261 host->caps |= MMC_CAP_MMC_HIGHSPEED; in mmc_of_parse()
262 if (device_property_read_bool(dev, "sd-uhs-sdr12")) in mmc_of_parse()
263 host->caps |= MMC_CAP_UHS_SDR12; in mmc_of_parse()
264 if (device_property_read_bool(dev, "sd-uhs-sdr25")) in mmc_of_parse()
265 host->caps |= MMC_CAP_UHS_SDR25; in mmc_of_parse()
266 if (device_property_read_bool(dev, "sd-uhs-sdr50")) in mmc_of_parse()
267 host->caps |= MMC_CAP_UHS_SDR50; in mmc_of_parse()
268 if (device_property_read_bool(dev, "sd-uhs-sdr104")) in mmc_of_parse()
269 host->caps |= MMC_CAP_UHS_SDR104; in mmc_of_parse()
270 if (device_property_read_bool(dev, "sd-uhs-ddr50")) in mmc_of_parse()
271 host->caps |= MMC_CAP_UHS_DDR50; in mmc_of_parse()
272 if (device_property_read_bool(dev, "cap-power-off-card")) in mmc_of_parse()
273 host->caps |= MMC_CAP_POWER_OFF_CARD; in mmc_of_parse()
274 if (device_property_read_bool(dev, "cap-mmc-hw-reset")) in mmc_of_parse()
275 host->caps |= MMC_CAP_HW_RESET; in mmc_of_parse()
276 if (device_property_read_bool(dev, "cap-sdio-irq")) in mmc_of_parse()
277 host->caps |= MMC_CAP_SDIO_IRQ; in mmc_of_parse()
278 if (device_property_read_bool(dev, "full-pwr-cycle")) in mmc_of_parse()
279 host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE; in mmc_of_parse()
280 if (device_property_read_bool(dev, "full-pwr-cycle-in-suspend")) in mmc_of_parse()
281 host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND; in mmc_of_parse()
282 if (device_property_read_bool(dev, "keep-power-in-suspend")) in mmc_of_parse()
283 host->pm_caps |= MMC_PM_KEEP_POWER; in mmc_of_parse()
284 if (device_property_read_bool(dev, "wakeup-source") || in mmc_of_parse()
285 device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */ in mmc_of_parse()
286 host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; in mmc_of_parse()
287 if (device_property_read_bool(dev, "mmc-ddr-3_3v")) in mmc_of_parse()
288 host->caps |= MMC_CAP_3_3V_DDR; in mmc_of_parse()
289 if (device_property_read_bool(dev, "mmc-ddr-1_8v")) in mmc_of_parse()
290 host->caps |= MMC_CAP_1_8V_DDR; in mmc_of_parse()
291 if (device_property_read_bool(dev, "mmc-ddr-1_2v")) in mmc_of_parse()
292 host->caps |= MMC_CAP_1_2V_DDR; in mmc_of_parse()
293 if (device_property_read_bool(dev, "mmc-hs200-1_8v")) in mmc_of_parse()
294 host->caps2 |= MMC_CAP2_HS200_1_8V_SDR; in mmc_of_parse()
295 if (device_property_read_bool(dev, "mmc-hs200-1_2v")) in mmc_of_parse()
296 host->caps2 |= MMC_CAP2_HS200_1_2V_SDR; in mmc_of_parse()
297 if (device_property_read_bool(dev, "mmc-hs400-1_8v")) in mmc_of_parse()
298 host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR; in mmc_of_parse()
299 if (device_property_read_bool(dev, "mmc-hs400-1_2v")) in mmc_of_parse()
300 host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR; in mmc_of_parse()
301 if (device_property_read_bool(dev, "mmc-hs400-enhanced-strobe")) in mmc_of_parse()
302 host->caps2 |= MMC_CAP2_HS400_ES; in mmc_of_parse()
303 if (device_property_read_bool(dev, "no-sdio")) in mmc_of_parse()
304 host->caps2 |= MMC_CAP2_NO_SDIO; in mmc_of_parse()
305 if (device_property_read_bool(dev, "no-sd")) in mmc_of_parse()
306 host->caps2 |= MMC_CAP2_NO_SD; in mmc_of_parse()
307 if (device_property_read_bool(dev, "no-mmc")) in mmc_of_parse()
308 host->caps2 |= MMC_CAP2_NO_MMC; in mmc_of_parse()
310 /* Must be after "non-removable" check */ in mmc_of_parse()
311 if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) { in mmc_of_parse()
312 if (host->caps & MMC_CAP_NONREMOVABLE) in mmc_of_parse()
313 host->fixed_drv_type = drv_type; in mmc_of_parse()
315 dev_err(host->parent, in mmc_of_parse()
319 host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr); in mmc_of_parse()
320 if (host->dsr_req && (host->dsr & ~0xffff)) { in mmc_of_parse()
321 dev_err(host->parent, in mmc_of_parse()
323 host->dsr); in mmc_of_parse()
324 host->dsr_req = 0; in mmc_of_parse()
327 device_property_read_u32(dev, "post-power-on-delay-ms", in mmc_of_parse()
328 &host->ios.power_delay_ms); in mmc_of_parse()
336 * mmc_of_parse_voltage - return mask of supported voltages
340 * Parse the "voltage-ranges" DT property, returning zero if it is not
341 * found, negative errno if the voltage-range specification is invalid,
342 * or one if the voltage-range is specified and successfully parsed.
349 voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); in mmc_of_parse_voltage()
351 pr_debug("%pOF: voltage-ranges unspecified\n", np); in mmc_of_parse_voltage()
356 pr_err("%pOF: voltage-ranges empty\n", np); in mmc_of_parse_voltage()
357 return -EINVAL; in mmc_of_parse_voltage()
368 pr_err("%pOF: voltage-range #%d is invalid\n", in mmc_of_parse_voltage()
370 return -EINVAL; in mmc_of_parse_voltage()
380 * mmc_first_nonreserved_index() - get the first index that is not reserved
394 * mmc_alloc_host - initialise the per-host structure.
398 * Initialise the per-host structure.
411 host->rescan_disable = 1; in mmc_alloc_host()
413 alias_id = of_alias_get_id(dev->of_node, "mmc"); in mmc_alloc_host()
428 host->index = err; in mmc_alloc_host()
430 dev_set_name(&host->class_dev, "mmc%d", host->index); in mmc_alloc_host()
431 host->ws = wakeup_source_register(NULL, dev_name(&host->class_dev)); in mmc_alloc_host()
433 host->parent = dev; in mmc_alloc_host()
434 host->class_dev.parent = dev; in mmc_alloc_host()
435 host->class_dev.class = &mmc_host_class; in mmc_alloc_host()
436 device_initialize(&host->class_dev); in mmc_alloc_host()
437 device_enable_async_suspend(&host->class_dev); in mmc_alloc_host()
440 put_device(&host->class_dev); in mmc_alloc_host()
444 spin_lock_init(&host->lock); in mmc_alloc_host()
445 init_waitqueue_head(&host->wq); in mmc_alloc_host()
446 INIT_DELAYED_WORK(&host->detect, mmc_rescan); in mmc_alloc_host()
447 INIT_DELAYED_WORK(&host->sdio_irq_work, sdio_irq_work); in mmc_alloc_host()
448 timer_setup(&host->retune_timer, mmc_retune_timer, 0); in mmc_alloc_host()
454 host->max_segs = 1; in mmc_alloc_host()
455 host->max_seg_size = PAGE_SIZE; in mmc_alloc_host()
457 host->max_req_size = PAGE_SIZE; in mmc_alloc_host()
458 host->max_blk_size = 512; in mmc_alloc_host()
459 host->max_blk_count = PAGE_SIZE / 512; in mmc_alloc_host()
461 host->fixed_drv_type = -EINVAL; in mmc_alloc_host()
462 host->ios.power_delay_ms = 10; in mmc_alloc_host()
463 host->ios.power_mode = MMC_POWER_UNDEFINED; in mmc_alloc_host()
471 * mmc_add_host - initialise host hardware
482 WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) && in mmc_add_host()
483 !host->ops->enable_sdio_irq); in mmc_add_host()
485 err = device_add(&host->class_dev); in mmc_add_host()
489 led_trigger_register_simple(dev_name(&host->class_dev), &host->led); in mmc_add_host()
504 * mmc_remove_host - remove host hardware
520 device_del(&host->class_dev); in mmc_remove_host()
522 led_trigger_unregister_simple(host->led); in mmc_remove_host()
528 * mmc_free_host - free the host structure
536 put_device(&host->class_dev); in mmc_free_host()