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![Simon Glass](/assets/img/avatar_default.png)
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
461 lines
11 KiB
C
461 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments' K3 DSP Remoteproc driver
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*
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* Copyright (C) 2018-2020 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla <lokeshvutla@ti.com>
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* Suman Anna <s-anna@ti.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <malloc.h>
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#include <remoteproc.h>
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#include <errno.h>
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#include <clk.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <power-domain.h>
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#include <dm/device_compat.h>
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#include <linux/err.h>
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#include <linux/sizes.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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#include "ti_sci_proc.h"
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#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
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/**
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* struct k3_dsp_mem - internal memory structure
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* @cpu_addr: MPU virtual address of the memory region
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* @bus_addr: Bus address used to access the memory region
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* @dev_addr: Device address from remoteproc view
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* @size: Size of the memory region
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*/
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struct k3_dsp_mem {
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void __iomem *cpu_addr;
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phys_addr_t bus_addr;
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phys_addr_t dev_addr;
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size_t size;
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};
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/**
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* struct k3_dsp_boot_data - internal data structure used for boot
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* @boot_align_addr: Boot vector address alignment granularity
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* @uses_lreset: Flag to denote the need for local reset management
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*/
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struct k3_dsp_boot_data {
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u32 boot_align_addr;
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bool uses_lreset;
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};
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/**
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* struct k3_dsp_privdata - Structure representing Remote processor data.
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* @rproc_rst: rproc reset control data
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* @tsp: Pointer to TISCI proc contrl handle
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* @data: Pointer to DSP specific boot data structure
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* @mem: Array of available memories
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* @num_mem: Number of available memories
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*/
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struct k3_dsp_privdata {
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struct reset_ctl dsp_rst;
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struct ti_sci_proc tsp;
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struct k3_dsp_boot_data *data;
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struct k3_dsp_mem *mem;
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int num_mems;
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};
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/*
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* The C66x DSP cores have a local reset that affects only the CPU, and a
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* generic module reset that powers on the device and allows the DSP internal
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* memories to be accessed while the local reset is asserted. This function is
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* used to release the global reset on C66x DSPs to allow loading into the DSP
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* internal RAMs. This helper function is invoked in k3_dsp_load() before any
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* actual firmware loading and is undone only in k3_dsp_stop(). The local reset
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* on C71x cores is a no-op and the global reset cannot be released on C71x
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* cores until after the firmware images are loaded, so this function does
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* nothing for C71x cores.
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*/
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static int k3_dsp_prepare(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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struct k3_dsp_boot_data *data = dsp->data;
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int ret;
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/* local reset is no-op on C71x processors */
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if (!data->uses_lreset)
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return 0;
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ret = ti_sci_proc_power_domain_on(&dsp->tsp);
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if (ret)
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dev_err(dev, "cannot enable internal RAM loading, ret = %d\n",
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ret);
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return ret;
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}
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/*
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* This function is the counterpart to k3_dsp_prepare() and is used to assert
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* the global reset on C66x DSP cores (no-op for C71x DSP cores). This completes
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* the second step of powering down the C66x DSP cores. The cores themselves
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* are halted through the local reset in first step. This function is invoked
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* in k3_dsp_stop() after the local reset is asserted.
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*/
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static int k3_dsp_unprepare(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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struct k3_dsp_boot_data *data = dsp->data;
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/* local reset is no-op on C71x processors */
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if (!data->uses_lreset)
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return 0;
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return ti_sci_proc_power_domain_off(&dsp->tsp);
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}
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/**
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* k3_dsp_load() - Load up the Remote processor image
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* @dev: rproc device pointer
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* @addr: Address at which image is available
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* @size: size of the image
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_dsp_load(struct udevice *dev, ulong addr, ulong size)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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struct k3_dsp_boot_data *data = dsp->data;
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u32 boot_vector;
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int ret;
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dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
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ret = ti_sci_proc_request(&dsp->tsp);
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if (ret)
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return ret;
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ret = k3_dsp_prepare(dev);
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if (ret) {
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dev_err(dev, "DSP prepare failed for core %d\n",
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dsp->tsp.proc_id);
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goto proc_release;
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}
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ret = rproc_elf_load_image(dev, addr, size);
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if (ret < 0) {
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dev_err(dev, "Loading elf failed %d\n", ret);
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goto unprepare;
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}
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boot_vector = rproc_elf_get_boot_addr(dev, addr);
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if (boot_vector & (data->boot_align_addr - 1)) {
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ret = -EINVAL;
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dev_err(dev, "Boot vector 0x%x not aligned on 0x%x boundary\n",
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boot_vector, data->boot_align_addr);
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goto proc_release;
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}
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dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
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ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
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unprepare:
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if (ret)
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k3_dsp_unprepare(dev);
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proc_release:
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ti_sci_proc_release(&dsp->tsp);
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return ret;
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}
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/**
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* k3_dsp_start() - Start the remote processor
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* @dev: rproc device pointer
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int k3_dsp_start(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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struct k3_dsp_boot_data *data = dsp->data;
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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ret = ti_sci_proc_request(&dsp->tsp);
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if (ret)
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return ret;
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if (!data->uses_lreset) {
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ret = ti_sci_proc_power_domain_on(&dsp->tsp);
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if (ret)
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goto proc_release;
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}
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ret = reset_deassert(&dsp->dsp_rst);
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if (ret) {
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if (!data->uses_lreset)
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ti_sci_proc_power_domain_off(&dsp->tsp);
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}
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proc_release:
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ti_sci_proc_release(&dsp->tsp);
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return ret;
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}
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static int k3_dsp_stop(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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dev_dbg(dev, "%s\n", __func__);
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ti_sci_proc_request(&dsp->tsp);
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reset_assert(&dsp->dsp_rst);
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ti_sci_proc_power_domain_off(&dsp->tsp);
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ti_sci_proc_release(&dsp->tsp);
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return 0;
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}
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/**
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* k3_dsp_init() - Initialize the remote processor
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* @dev: rproc device pointer
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int k3_dsp_init(struct udevice *dev)
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{
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dev_dbg(dev, "%s\n", __func__);
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return 0;
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}
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static int k3_dsp_reset(struct udevice *dev)
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{
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dev_dbg(dev, "%s\n", __func__);
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return 0;
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}
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static void *k3_dsp_da_to_va(struct udevice *dev, ulong da, ulong len)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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phys_addr_t bus_addr, dev_addr;
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void __iomem *va = NULL;
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size_t size;
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u32 offset;
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int i;
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dev_dbg(dev, "%s\n", __func__);
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if (len <= 0)
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return NULL;
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for (i = 0; i < dsp->num_mems; i++) {
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bus_addr = dsp->mem[i].bus_addr;
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dev_addr = dsp->mem[i].dev_addr;
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size = dsp->mem[i].size;
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if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
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offset = da - dev_addr;
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va = dsp->mem[i].cpu_addr + offset;
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return (__force void *)va;
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}
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if (da >= bus_addr && (da + len) <= (bus_addr + size)) {
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offset = da - bus_addr;
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va = dsp->mem[i].cpu_addr + offset;
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return (__force void *)va;
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}
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}
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/* Assume it is DDR region and return da */
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return map_physmem(da, len, MAP_NOCACHE);
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}
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static const struct dm_rproc_ops k3_dsp_ops = {
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.init = k3_dsp_init,
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.load = k3_dsp_load,
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.start = k3_dsp_start,
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.stop = k3_dsp_stop,
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.reset = k3_dsp_reset,
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.device_to_virt = k3_dsp_da_to_va,
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};
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static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
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{
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u32 ids[2];
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
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if (IS_ERR(tsp->sci)) {
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dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
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return PTR_ERR(tsp->sci);
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}
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ret = dev_read_u32_array(dev, "ti,sci-proc-ids", ids, 2);
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if (ret) {
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dev_err(dev, "Proc IDs not populated %d\n", ret);
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return ret;
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}
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tsp->ops = &tsp->sci->ops.proc_ops;
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tsp->proc_id = ids[0];
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tsp->host_id = ids[1];
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tsp->dev_id = dev_read_u32_default(dev, "ti,sci-dev-id",
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TI_SCI_RESOURCE_NULL);
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if (tsp->dev_id == TI_SCI_RESOURCE_NULL) {
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dev_err(dev, "Device ID not populated %d\n", ret);
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return -ENODEV;
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}
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return 0;
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}
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static int k3_dsp_of_get_memories(struct udevice *dev)
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{
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static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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int i;
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dev_dbg(dev, "%s\n", __func__);
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dsp->num_mems = ARRAY_SIZE(mem_names);
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dsp->mem = calloc(dsp->num_mems, sizeof(*dsp->mem));
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if (!dsp->mem)
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return -ENOMEM;
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for (i = 0; i < dsp->num_mems; i++) {
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/* C71 cores only have a L1P Cache, there are no L1P SRAMs */
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if (device_is_compatible(dev, "ti,j721e-c71-dsp") &&
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!strcmp(mem_names[i], "l1pram")) {
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dsp->mem[i].bus_addr = FDT_ADDR_T_NONE;
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dsp->mem[i].dev_addr = FDT_ADDR_T_NONE;
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dsp->mem[i].cpu_addr = NULL;
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dsp->mem[i].size = 0;
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continue;
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}
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dsp->mem[i].bus_addr = dev_read_addr_size_name(dev, mem_names[i],
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(fdt_addr_t *)&dsp->mem[i].size);
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if (dsp->mem[i].bus_addr == FDT_ADDR_T_NONE) {
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dev_err(dev, "%s bus address not found\n", mem_names[i]);
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return -EINVAL;
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}
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dsp->mem[i].cpu_addr = map_physmem(dsp->mem[i].bus_addr,
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dsp->mem[i].size,
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MAP_NOCACHE);
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dsp->mem[i].dev_addr = dsp->mem[i].bus_addr &
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KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
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dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da %pa\n",
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mem_names[i], &dsp->mem[i].bus_addr,
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dsp->mem[i].size, dsp->mem[i].cpu_addr,
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&dsp->mem[i].dev_addr);
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}
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return 0;
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}
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/**
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* k3_of_to_priv() - generate private data from device tree
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* @dev: corresponding k3 dsp processor device
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* @dsp: pointer to driver specific private data
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_dsp_of_to_priv(struct udevice *dev, struct k3_dsp_privdata *dsp)
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{
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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ret = reset_get_by_index(dev, 0, &dsp->dsp_rst);
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if (ret) {
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dev_err(dev, "reset_get() failed: %d\n", ret);
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return ret;
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}
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ret = ti_sci_proc_of_to_priv(dev, &dsp->tsp);
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if (ret)
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return ret;
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ret = k3_dsp_of_get_memories(dev);
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if (ret)
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return ret;
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dsp->data = (struct k3_dsp_boot_data *)dev_get_driver_data(dev);
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return 0;
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}
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/**
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* k3_dsp_probe() - Basic probe
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* @dev: corresponding k3 remote processor device
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_dsp_probe(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp;
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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dsp = dev_get_priv(dev);
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ret = k3_dsp_of_to_priv(dev, dsp);
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if (ret) {
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dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
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return ret;
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}
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/*
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* The DSP local resets are deasserted by default on Power-On-Reset.
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* Assert the local resets to ensure the DSPs don't execute bogus code
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* in .load() callback when the module reset is released to support
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* internal memory loading. This is needed for C66x DSPs, and is a
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* no-op on C71x DSPs.
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*/
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reset_assert(&dsp->dsp_rst);
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dev_dbg(dev, "Remoteproc successfully probed\n");
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return 0;
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}
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static int k3_dsp_remove(struct udevice *dev)
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{
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struct k3_dsp_privdata *dsp = dev_get_priv(dev);
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free(dsp->mem);
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return 0;
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}
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static const struct k3_dsp_boot_data c66_data = {
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.boot_align_addr = SZ_1K,
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.uses_lreset = true,
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};
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static const struct k3_dsp_boot_data c71_data = {
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.boot_align_addr = SZ_2M,
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.uses_lreset = false,
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};
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static const struct udevice_id k3_dsp_ids[] = {
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{ .compatible = "ti,j721e-c66-dsp", .data = (ulong)&c66_data, },
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{ .compatible = "ti,j721e-c71-dsp", .data = (ulong)&c71_data, },
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{}
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};
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U_BOOT_DRIVER(k3_dsp) = {
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.name = "k3_dsp",
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.of_match = k3_dsp_ids,
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.id = UCLASS_REMOTEPROC,
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.ops = &k3_dsp_ops,
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.probe = k3_dsp_probe,
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.remove = k3_dsp_remove,
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.priv_auto = sizeof(struct k3_dsp_privdata),
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};
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