Lines Matching +full:ipa +full:- +full:clock +full:- +full:enabled
1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2018-2022 Linaro Ltd.
16 #include "ipa.h"
23 * DOC: IPA Power Management
25 * The IPA hardware is enabled when the IPA core clock and all the
26 * interconnects (buses) it depends on are enabled. Runtime power
27 * management is used to determine whether the core clock and
28 * interconnects are enabled, and if not in use to be suspended
31 * The core clock currently runs at a fixed clock rate when enabled,
38 * enum ipa_power_flag - IPA power flags
42 * @IPA_POWER_FLAG_STARTED: Modem TX was enabled by ipa_runtime_resume()
54 * struct ipa_power - IPA power management information
55 * @dev: IPA device pointer
56 * @core: IPA core clock
73 /* Initialize interconnects required for IPA operation */
82 interconnect = &power->interconnect[0]; in ipa_interconnect_init()
83 for (i = 0; i < power->interconnect_count; i++) { in ipa_interconnect_init()
84 /* interconnect->path is filled in by of_icc_bulk_get() */ in ipa_interconnect_init()
85 interconnect->name = data->name; in ipa_interconnect_init()
86 interconnect->avg_bw = data->average_bandwidth; in ipa_interconnect_init()
87 interconnect->peak_bw = data->peak_bandwidth; in ipa_interconnect_init()
92 ret = of_icc_bulk_get(power->dev, power->interconnect_count, in ipa_interconnect_init()
93 power->interconnect); in ipa_interconnect_init()
98 icc_bulk_disable(power->interconnect_count, power->interconnect); in ipa_interconnect_init()
100 /* Set the bandwidth values to be used when enabled */ in ipa_interconnect_init()
101 ret = icc_bulk_set_bw(power->interconnect_count, power->interconnect); in ipa_interconnect_init()
103 icc_bulk_put(power->interconnect_count, power->interconnect); in ipa_interconnect_init()
111 icc_bulk_put(power->interconnect_count, power->interconnect); in ipa_interconnect_exit()
114 /* Enable IPA power, enabling interconnects and the core clock */
115 static int ipa_power_enable(struct ipa *ipa) in ipa_power_enable() argument
117 struct ipa_power *power = ipa->power; in ipa_power_enable()
120 ret = icc_bulk_enable(power->interconnect_count, power->interconnect); in ipa_power_enable()
124 ret = clk_prepare_enable(power->core); in ipa_power_enable()
126 dev_err(power->dev, "error %d enabling core clock\n", ret); in ipa_power_enable()
127 icc_bulk_disable(power->interconnect_count, in ipa_power_enable()
128 power->interconnect); in ipa_power_enable()
135 static void ipa_power_disable(struct ipa *ipa) in ipa_power_disable() argument
137 struct ipa_power *power = ipa->power; in ipa_power_disable()
139 clk_disable_unprepare(power->core); in ipa_power_disable()
141 icc_bulk_disable(power->interconnect_count, power->interconnect); in ipa_power_disable()
146 struct ipa *ipa = dev_get_drvdata(dev); in ipa_runtime_suspend() local
149 if (ipa->setup_complete) { in ipa_runtime_suspend()
150 __clear_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags); in ipa_runtime_suspend()
151 ipa_endpoint_suspend(ipa); in ipa_runtime_suspend()
152 gsi_suspend(&ipa->gsi); in ipa_runtime_suspend()
155 ipa_power_disable(ipa); in ipa_runtime_suspend()
162 struct ipa *ipa = dev_get_drvdata(dev); in ipa_runtime_resume() local
165 ret = ipa_power_enable(ipa); in ipa_runtime_resume()
170 if (ipa->setup_complete) { in ipa_runtime_resume()
171 gsi_resume(&ipa->gsi); in ipa_runtime_resume()
172 ipa_endpoint_resume(ipa); in ipa_runtime_resume()
180 struct ipa *ipa = dev_get_drvdata(dev); in ipa_suspend() local
182 __set_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags); in ipa_suspend()
185 * be re-enabled until the matching _enable call in in ipa_suspend()
190 * irq wake. If wakeup is enabled for the IPA then the IRQ in ipa_suspend()
193 ipa_interrupt_irq_disable(ipa); in ipa_suspend()
200 struct ipa *ipa = dev_get_drvdata(dev); in ipa_resume() local
205 __clear_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags); in ipa_resume()
207 /* Now that PM runtime is enabled again it's safe in ipa_resume()
211 ipa_interrupt_irq_enable(ipa); in ipa_resume()
216 /* Return the current IPA core clock rate */
217 u32 ipa_core_clock_rate(struct ipa *ipa) in ipa_core_clock_rate() argument
219 return ipa->power ? (u32)clk_get_rate(ipa->power->core) : 0; in ipa_core_clock_rate()
222 void ipa_power_suspend_handler(struct ipa *ipa, enum ipa_irq_id irq_id) in ipa_power_suspend_handler() argument
224 /* To handle an IPA interrupt we will have resumed the hardware in ipa_power_suspend_handler()
228 if (!__test_and_set_bit(IPA_POWER_FLAG_RESUMED, ipa->power->flags)) in ipa_power_suspend_handler()
229 if (test_bit(IPA_POWER_FLAG_SYSTEM, ipa->power->flags)) in ipa_power_suspend_handler()
230 pm_wakeup_dev_event(&ipa->pdev->dev, 0, true); in ipa_power_suspend_handler()
233 ipa_interrupt_suspend_clear_all(ipa->interrupt); in ipa_power_suspend_handler()
257 * from the power ->runtime_resume operation.
259 void ipa_power_modem_queue_stop(struct ipa *ipa) in ipa_power_modem_queue_stop() argument
261 struct ipa_power *power = ipa->power; in ipa_power_modem_queue_stop()
264 spin_lock_irqsave(&power->spinlock, flags); in ipa_power_modem_queue_stop()
266 if (!__test_and_clear_bit(IPA_POWER_FLAG_STARTED, power->flags)) { in ipa_power_modem_queue_stop()
267 netif_stop_queue(ipa->modem_netdev); in ipa_power_modem_queue_stop()
268 __set_bit(IPA_POWER_FLAG_STOPPED, power->flags); in ipa_power_modem_queue_stop()
271 spin_unlock_irqrestore(&power->spinlock, flags); in ipa_power_modem_queue_stop()
279 void ipa_power_modem_queue_wake(struct ipa *ipa) in ipa_power_modem_queue_wake() argument
281 struct ipa_power *power = ipa->power; in ipa_power_modem_queue_wake()
284 spin_lock_irqsave(&power->spinlock, flags); in ipa_power_modem_queue_wake()
286 if (__test_and_clear_bit(IPA_POWER_FLAG_STOPPED, power->flags)) { in ipa_power_modem_queue_wake()
287 __set_bit(IPA_POWER_FLAG_STARTED, power->flags); in ipa_power_modem_queue_wake()
288 netif_wake_queue(ipa->modem_netdev); in ipa_power_modem_queue_wake()
291 spin_unlock_irqrestore(&power->spinlock, flags); in ipa_power_modem_queue_wake()
295 void ipa_power_modem_queue_active(struct ipa *ipa) in ipa_power_modem_queue_active() argument
297 clear_bit(IPA_POWER_FLAG_STARTED, ipa->power->flags); in ipa_power_modem_queue_active()
302 struct qmp *qmp = qmp_get(power->dev); in ipa_power_retention_init()
305 if (PTR_ERR(qmp) == -EPROBE_DEFER) in ipa_power_retention_init()
306 return -EPROBE_DEFER; in ipa_power_retention_init()
311 power->qmp = qmp; in ipa_power_retention_init()
318 qmp_put(power->qmp); in ipa_power_retention_exit()
319 power->qmp = NULL; in ipa_power_retention_exit()
323 void ipa_power_retention(struct ipa *ipa, bool enable) in ipa_power_retention() argument
326 struct ipa_power *power = ipa->power; in ipa_power_retention()
329 if (!power->qmp) in ipa_power_retention()
332 ret = qmp_send(power->qmp, fmt, enable ? '1' : '0'); in ipa_power_retention()
334 dev_err(power->dev, "error %d sending QMP %sable request\n", in ipa_power_retention()
338 int ipa_power_setup(struct ipa *ipa) in ipa_power_setup() argument
342 ipa_interrupt_enable(ipa, IPA_IRQ_TX_SUSPEND); in ipa_power_setup()
344 ret = device_init_wakeup(&ipa->pdev->dev, true); in ipa_power_setup()
346 ipa_interrupt_disable(ipa, IPA_IRQ_TX_SUSPEND); in ipa_power_setup()
351 void ipa_power_teardown(struct ipa *ipa) in ipa_power_teardown() argument
353 (void)device_init_wakeup(&ipa->pdev->dev, false); in ipa_power_teardown()
354 ipa_interrupt_disable(ipa, IPA_IRQ_TX_SUSPEND); in ipa_power_teardown()
357 /* Initialize IPA power management */
368 dev_err_probe(dev, PTR_ERR(clk), "error getting core clock\n"); in ipa_power_init()
373 ret = clk_set_rate(clk, data->core_clock_rate); in ipa_power_init()
375 dev_err(dev, "error %d setting core clock rate to %u\n", in ipa_power_init()
376 ret, data->core_clock_rate); in ipa_power_init()
380 size = struct_size(power, interconnect, data->interconnect_count); in ipa_power_init()
383 ret = -ENOMEM; in ipa_power_init()
386 power->dev = dev; in ipa_power_init()
387 power->core = clk; in ipa_power_init()
388 spin_lock_init(&power->spinlock); in ipa_power_init()
389 power->interconnect_count = data->interconnect_count; in ipa_power_init()
391 ret = ipa_interconnect_init(power, data->interconnect_data); in ipa_power_init()
418 struct device *dev = power->dev; in ipa_power_exit()
419 struct clk *clk = power->core; in ipa_power_exit()