^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * TI Keystone DSP remoteproc driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015-2017 Texas Instruments Incorporated - http://www.ti.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_reserved_mem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/remoteproc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/reset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "remoteproc_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * struct keystone_rproc_mem - internal memory structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * @cpu_addr: MPU virtual address of the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * @bus_addr: Bus address used to access the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * @dev_addr: Device address of the memory region from DSP view
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * @size: Size of the memory region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct keystone_rproc_mem {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) void __iomem *cpu_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) phys_addr_t bus_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u32 dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * struct keystone_rproc - keystone remote processor driver structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * @dev: cached device pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * @rproc: remoteproc device handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * @mem: internal memory regions data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * @num_mems: number of internal memory regions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @dev_ctrl: device control regmap handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * @reset: reset control handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * @boot_offset: boot register offset in @dev_ctrl regmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * @irq_ring: irq entry for vring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * @irq_fault: irq entry for exception
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * @kick_gpio: gpio used for virtio kicks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * @workqueue: workqueue for processing virtio interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct keystone_rproc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct rproc *rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct keystone_rproc_mem *mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int num_mems;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct regmap *dev_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct reset_control *reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u32 boot_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int irq_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int irq_fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int kick_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct work_struct workqueue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Put the DSP processor into reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void keystone_rproc_dsp_reset(struct keystone_rproc *ksproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) reset_control_assert(ksproc->reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* Configure the boot address and boot the DSP processor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int keystone_rproc_dsp_boot(struct keystone_rproc *ksproc, u32 boot_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (boot_addr & (SZ_1K - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dev_err(ksproc->dev, "invalid boot address 0x%x, must be aligned on a 1KB boundary\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) boot_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ret = regmap_write(ksproc->dev_ctrl, ksproc->boot_offset, boot_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_err(ksproc->dev, "regmap_write of boot address failed, status = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) reset_control_deassert(ksproc->reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * Process the remoteproc exceptions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * The exception reporting on Keystone DSP remote processors is very simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * compared to the equivalent processors on the OMAP family, it is notified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * through a software-designed specific interrupt source in the IPC interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * generation register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * This function just invokes the rproc_report_crash to report the exception
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * to the remoteproc driver core, to trigger a recovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static irqreturn_t keystone_rproc_exception_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct keystone_rproc *ksproc = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rproc_report_crash(ksproc->rproc, RPROC_FATAL_ERROR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Main virtqueue message workqueue function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * This function is executed upon scheduling of the keystone remoteproc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * driver's workqueue. The workqueue is scheduled by the vring ISR handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * There is no payload message indicating the virtqueue index as is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * case with mailbox-based implementations on OMAP family. As such, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * handler processes both the Tx and Rx virtqueue indices on every invocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * The rproc_vq_interrupt function can detect if there are new unprocessed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * messages or not (returns IRQ_NONE vs IRQ_HANDLED), but there is no need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * to check for these return values. The index 0 triggering will process all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * pending Rx buffers, and the index 1 triggering will process all newly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * available Tx buffers and will wakeup any potentially blocked senders.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * NOTE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * 1. A payload could be added by using some of the source bits in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * IPC interrupt generation registers, but this would need additional
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * changes to the overall IPC stack, and currently there are no benefits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * of adapting that approach.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * 2. The current logic is based on an inherent design assumption of supporting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * only 2 vrings, but this can be changed if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void handle_event(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct keystone_rproc *ksproc =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) container_of(work, struct keystone_rproc, workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) rproc_vq_interrupt(ksproc->rproc, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) rproc_vq_interrupt(ksproc->rproc, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * Interrupt handler for processing vring kicks from remote processor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static irqreturn_t keystone_rproc_vring_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct keystone_rproc *ksproc = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) schedule_work(&ksproc->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * Power up the DSP remote processor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * This function will be invoked only after the firmware for this rproc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * was loaded, parsed successfully, and all of its resource requirements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * were met.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int keystone_rproc_start(struct rproc *rproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct keystone_rproc *ksproc = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) INIT_WORK(&ksproc->workqueue, handle_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) ret = request_irq(ksproc->irq_ring, keystone_rproc_vring_interrupt, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) dev_name(ksproc->dev), ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) dev_err(ksproc->dev, "failed to enable vring interrupt, ret = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ret = request_irq(ksproc->irq_fault, keystone_rproc_exception_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 0, dev_name(ksproc->dev), ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) dev_err(ksproc->dev, "failed to enable exception interrupt, ret = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) goto free_vring_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ret = keystone_rproc_dsp_boot(ksproc, rproc->bootaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) goto free_exc_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) free_exc_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) free_irq(ksproc->irq_fault, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) free_vring_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) free_irq(ksproc->irq_ring, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) flush_work(&ksproc->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * Stop the DSP remote processor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * This function puts the DSP processor into reset, and finishes processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * of any pending messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int keystone_rproc_stop(struct rproc *rproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct keystone_rproc *ksproc = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) keystone_rproc_dsp_reset(ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) free_irq(ksproc->irq_fault, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) free_irq(ksproc->irq_ring, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) flush_work(&ksproc->workqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * Kick the remote processor to notify about pending unprocessed messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * The vqid usage is not used and is inconsequential, as the kick is performed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * the remote processor is expected to process both its Tx and Rx virtqueues.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static void keystone_rproc_kick(struct rproc *rproc, int vqid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct keystone_rproc *ksproc = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (WARN_ON(ksproc->kick_gpio < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) gpio_set_value(ksproc->kick_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * Custom function to translate a DSP device address (internal RAMs only) to a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * kernel virtual address. The DSPs can access their RAMs at either an internal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * address visible only from a DSP, or at the SoC-level bus address. Both these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * addresses need to be looked through for translation. The translated addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * can be used either by the remoteproc core for loading (when using kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * remoteproc loader), or by any rpmsg bus drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct keystone_rproc *ksproc = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) void __iomem *va = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) phys_addr_t bus_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) u32 dev_addr, offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) for (i = 0; i < ksproc->num_mems; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) bus_addr = ksproc->mem[i].bus_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) dev_addr = ksproc->mem[i].dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) size = ksproc->mem[i].size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* handle DSP-view addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if ((da >= dev_addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) ((da + len) <= (dev_addr + size))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) offset = da - dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) va = ksproc->mem[i].cpu_addr + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* handle SoC-view addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if ((da >= bus_addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) (da + len) <= (bus_addr + size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) offset = da - bus_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) va = ksproc->mem[i].cpu_addr + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return (__force void *)va;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static const struct rproc_ops keystone_rproc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .start = keystone_rproc_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) .stop = keystone_rproc_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .kick = keystone_rproc_kick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .da_to_va = keystone_rproc_da_to_va,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static int keystone_rproc_of_get_memories(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct keystone_rproc *ksproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) int num_mems = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) num_mems = ARRAY_SIZE(mem_names);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) ksproc->mem = devm_kcalloc(ksproc->dev, num_mems,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) sizeof(*ksproc->mem), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (!ksproc->mem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) for (i = 0; i < num_mems; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) mem_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) ksproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (IS_ERR(ksproc->mem[i].cpu_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) dev_err(dev, "failed to parse and map %s memory\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) mem_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return PTR_ERR(ksproc->mem[i].cpu_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) ksproc->mem[i].bus_addr = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) ksproc->mem[i].dev_addr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) res->start & KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) ksproc->mem[i].size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /* zero out memories to start in a pristine state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) memset((__force void *)ksproc->mem[i].cpu_addr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ksproc->mem[i].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) ksproc->num_mems = num_mems;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int keystone_rproc_of_get_dev_syscon(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct keystone_rproc *ksproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (!of_property_read_bool(np, "ti,syscon-dev")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dev_err(dev, "ti,syscon-dev property is absent\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) ksproc->dev_ctrl =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (IS_ERR(ksproc->dev_ctrl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) ret = PTR_ERR(ksproc->dev_ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (of_property_read_u32_index(np, "ti,syscon-dev", 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) &ksproc->boot_offset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) dev_err(dev, "couldn't read the boot register offset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) static int keystone_rproc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct keystone_rproc *ksproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct rproc *rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) int dsp_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) char *fw_name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) char *template = "keystone-dsp%d-fw";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) dev_err(dev, "only DT-based devices are supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) dsp_id = of_alias_get_id(np, "rproc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (dsp_id < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) dev_warn(dev, "device does not have an alias id\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return dsp_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /* construct a custom default fw name - subject to change in future */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) name_len = strlen(template); /* assuming a single digit alias */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) fw_name = devm_kzalloc(dev, name_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (!fw_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) snprintf(fw_name, name_len, template, dsp_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) rproc = rproc_alloc(dev, dev_name(dev), &keystone_rproc_ops, fw_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) sizeof(*ksproc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (!rproc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) rproc->has_iommu = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ksproc = rproc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) ksproc->rproc = rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) ksproc->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ret = keystone_rproc_of_get_dev_syscon(pdev, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) goto free_rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) ksproc->reset = devm_reset_control_get_exclusive(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (IS_ERR(ksproc->reset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ret = PTR_ERR(ksproc->reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) goto free_rproc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /* enable clock for accessing DSP internal memories */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) pm_runtime_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ret = pm_runtime_get_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) dev_err(dev, "failed to enable clock, status = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) pm_runtime_put_noidle(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) goto disable_rpm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) ret = keystone_rproc_of_get_memories(pdev, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) goto disable_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) ksproc->irq_ring = platform_get_irq_byname(pdev, "vring");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (ksproc->irq_ring < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) ret = ksproc->irq_ring;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) goto disable_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) ksproc->irq_fault = platform_get_irq_byname(pdev, "exception");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (ksproc->irq_fault < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) ret = ksproc->irq_fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) goto disable_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) ksproc->kick_gpio = of_get_named_gpio_flags(np, "kick-gpios", 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (ksproc->kick_gpio < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ret = ksproc->kick_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) dev_err(dev, "failed to get gpio for virtio kicks, status = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) goto disable_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (of_reserved_mem_device_init(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) dev_warn(dev, "device does not have specific CMA pool\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /* ensure the DSP is in reset before loading firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) ret = reset_control_status(ksproc->reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) dev_err(dev, "failed to get reset status, status = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) goto release_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) } else if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) WARN(1, "device is not in reset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) keystone_rproc_dsp_reset(ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ret = rproc_add(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) dev_err(dev, "failed to add register device with remoteproc core, status = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) goto release_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) platform_set_drvdata(pdev, ksproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) release_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) of_reserved_mem_device_release(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) disable_clk:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) pm_runtime_put_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) disable_rpm:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) pm_runtime_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) free_rproc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) rproc_free(rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) static int keystone_rproc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct keystone_rproc *ksproc = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) rproc_del(ksproc->rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) pm_runtime_put_sync(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) pm_runtime_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) rproc_free(ksproc->rproc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) of_reserved_mem_device_release(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) static const struct of_device_id keystone_rproc_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) { .compatible = "ti,k2hk-dsp", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) { .compatible = "ti,k2l-dsp", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) { .compatible = "ti,k2e-dsp", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) { .compatible = "ti,k2g-dsp", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) { /* sentinel */ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) MODULE_DEVICE_TABLE(of, keystone_rproc_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static struct platform_driver keystone_rproc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) .probe = keystone_rproc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) .remove = keystone_rproc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) .name = "keystone-rproc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) .of_match_table = keystone_rproc_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) module_platform_driver(keystone_rproc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) MODULE_DESCRIPTION("TI Keystone DSP Remoteproc driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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