Re: [PATCH 3/3] remoteproc: ingenic: Added remoteproc driver
From: Paul Cercueil
Date: Thu Jul 25 2019 - 18:51:10 EST
Hi,
Le dim. 21 juil. 2019 à 22:31, Paul Cercueil <paul@xxxxxxxxxxxxxxx> a
écrit :
This driver is used to boot, communicate with and load firmwares to
the
MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from
Ingenic.
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---
drivers/remoteproc/Kconfig | 8 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/ingenic_rproc.c | 302
+++++++++++++++++++++++++++++
3 files changed, 311 insertions(+)
create mode 100644 drivers/remoteproc/ingenic_rproc.c
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 28ed306982f7..a0be40e2098d 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -214,6 +214,14 @@ config STM32_RPROC
This can be either built-in or a loadable module.
+config INGENIC_RPROC
+ tristate "Ingenic JZ47xx VPU remoteproc support"
+ depends on MIPS || COMPILE_TEST
+ help
+ Say y or m here to support the VPU in the JZ47xx SoCs from
Ingenic.
+ This can be either built-in or a loadable module.
+ If unsure say N.
+
endif # REMOTEPROC
endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 00f09e658cb3..6eb0137abbc7 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -10,6 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
+obj-$(CONFIG_INGENIC_RPROC) += ingenic_rproc.o
obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
diff --git a/drivers/remoteproc/ingenic_rproc.c
b/drivers/remoteproc/ingenic_rproc.c
new file mode 100644
index 000000000000..a4963158bdd3
--- /dev/null
+++ b/drivers/remoteproc/ingenic_rproc.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Ingenic JZ47xx remoteproc driver
+ * Copyright 2019, Paul Cercueil <paul@xxxxxxxxxxxxxxx>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include "remoteproc_internal.h"
+
+#define REG_AUX_CTRL 0x0
+#define REG_AUX_MSG_ACK 0x10
+#define REG_AUX_MSG 0x14
+#define REG_CORE_MSG_ACK 0x18
+#define REG_CORE_MSG 0x1C
+
+#define AUX_CTRL_SLEEP BIT(31)
+#define AUX_CTRL_MSG_IRQ_EN BIT(3)
+#define AUX_CTRL_NMI_RESETS BIT(2)
+#define AUX_CTRL_NMI BIT(1)
+#define AUX_CTRL_SW_RESET BIT(0)
+
+struct vpu_mem_map {
+ const char *name;
+ unsigned int da;
+ bool direct_io;
+};
+
+struct vpu_mem_info {
+ const struct vpu_mem_map *map;
+ unsigned long len;
+ void __iomem *base;
+};
+
+static const struct vpu_mem_map vpu_mem_map[] = {
+ { "tcsm0", 0x132b0000, true },
+ { "tcsm1", 0xf4000000 },
+ { "sram", 0x132f0000 },
+};
+
+/* Device data */
+struct vpu {
+ int irq;
+ struct clk *vpu_clk;
+ struct clk *aux_clk;
+ void __iomem *aux_base;
+ struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
+ struct device *dev;
+};
+
+static int ingenic_rproc_prepare(struct rproc *rproc)
+{
+ struct vpu *vpu = rproc->priv;
+ int ret;
+
+ ret = clk_prepare_enable(vpu->vpu_clk);
+ if (ret) {
+ dev_err(vpu->dev, "Unable to start VPU clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(vpu->aux_clk);
+ if (ret) {
+ dev_err(vpu->dev, "Unable to start AUX clock: %d\n", ret);
+ goto err_disable_vpu_clk;
+ }
+
+ return 0;
+
+err_disable_vpu_clk:
+ clk_disable_unprepare(vpu->vpu_clk);
+ return ret;
+}
+
+static void ingenic_rproc_unprepare(struct rproc *rproc)
+{
+ struct vpu *vpu = rproc->priv;
+
+ clk_disable_unprepare(vpu->aux_clk);
+ clk_disable_unprepare(vpu->vpu_clk);
+}
+
+static int ingenic_rproc_start(struct rproc *rproc)
+{
+ struct vpu *vpu = rproc->priv;
+ u32 ctrl;
+
+ enable_irq(vpu->irq);
+
+ /* Reset the AUX and enable message IRQ */
+ ctrl = AUX_CTRL_NMI_RESETS | AUX_CTRL_NMI | AUX_CTRL_MSG_IRQ_EN;
+ writel(ctrl, vpu->aux_base + REG_AUX_CTRL);
+
+ return 0;
+}
+
+static int ingenic_rproc_stop(struct rproc *rproc)
+{
+ struct vpu *vpu = rproc->priv;
+
+ /* Keep AUX in reset mode */
+ writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);
+
+ disable_irq_nosync(vpu->irq);
+
+ return 0;
+}
+
+static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct vpu *vpu = rproc->priv;
+
+ writel(vqid, vpu->aux_base + REG_CORE_MSG);
+}
+
+static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, int
len)
+{
+ struct vpu *vpu = rproc->priv;
+ void __iomem *va = NULL;
+ unsigned int i;
+
+ if (len <= 0)
+ return NULL;
+
+ for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
+ const struct vpu_mem_info *info = &vpu->mem_info[i];
+ const struct vpu_mem_map *map = info->map;
+
+ if (da >= map->da && (da + len) < (map->da + info->len)) {
+ va = info->base + (da - map->da);
+ break;
+ }
+ }
+
+ return (__force void *)va;
+}
+
+static struct rproc_ops ingenic_rproc_ops = {
+ .prepare = ingenic_rproc_prepare,
+ .unprepare = ingenic_rproc_unprepare,
+ .start = ingenic_rproc_start,
+ .stop = ingenic_rproc_stop,
+ .kick = ingenic_rproc_kick,
+ .da_to_va = ingenic_rproc_da_to_va,
+};
+
+static irqreturn_t vpu_interrupt(int irq, void *data)
+{
+ struct rproc *rproc = data;
+ struct vpu *vpu = rproc->priv;
+ u32 vring;
+
+ vring = readl(vpu->aux_base + REG_AUX_MSG);
+
+ /* Ack the interrupt */
+ writel(0, vpu->aux_base + REG_AUX_MSG_ACK);
+
+ return rproc_vq_interrupt(rproc, vring);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ingenic_rproc_of_matches[] = {
+ { .compatible = "ingenic,jz4770-vpu-rproc", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
+#endif
+
+static void ingenic_rproc_free(void *rproc)
+{
+ rproc_free(rproc);
+}
+
+static void ingenic_rproc_unregister(void *rproc)
+{
+ rproc_del(rproc);
+ rproc_shutdown(rproc);
+}
+
+static int ingenic_rproc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *mem;
+ struct rproc *rproc;
+ struct vpu *vpu;
+ unsigned int i;
+ int ret;
+
+ rproc = rproc_alloc(dev, "ingenic-vpu",
+ &ingenic_rproc_ops, NULL, sizeof(*vpu));
+ if (!rproc)
+ return -ENOMEM;
+
+ ret = devm_add_action_or_reset(dev, ingenic_rproc_free, rproc);
+ if (ret) {
+ dev_err(dev, "Unable to add action");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, rproc);
+ vpu = rproc->priv;
+ vpu->dev = &pdev->dev;
+
+ mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
+ vpu->aux_base = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(vpu->aux_base)) {
+ dev_err(dev, "Failed to ioremap");
+ return PTR_ERR(vpu->aux_base);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
+ mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ vpu_mem_map[i].name);
+
+ if (vpu_mem_map[i].direct_io) {
+ /*
+ * Handle shared memories that cannot be iomapped.
+ * They can be read or written directly through their
+ * physical address.
+ */
I found there's actually a mirror of that shared memory that can be
iomapped.
I'll send a V2 and remove that workaround.
Thanks,
-Paul
+ if (!devm_request_mem_region(dev, mem->start,
+ resource_size(mem),
+ dev_name(dev))) {
+ dev_err(dev, "Unable to request memory region");
+ return -EBUSY;
+ }
+
+ vpu->mem_info[i].base = (void __iomem *)mem->start;
+ } else {
+ vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(vpu->mem_info[i].base)) {
+ ret = PTR_ERR(vpu->mem_info[i].base);
+ dev_err(dev, "Failed to ioremap");
+ return ret;
+ }
+ }
+
+ vpu->mem_info[i].len = resource_size(mem);
+ vpu->mem_info[i].map = &vpu_mem_map[i];
+ }
+
+ vpu->vpu_clk = devm_clk_get(dev, "vpu");
+ if (IS_ERR(vpu->vpu_clk)) {
+ dev_err(dev, "Failed to get VPU clock");
+ return PTR_ERR(vpu->vpu_clk);
+ }
+
+ vpu->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(vpu->aux_clk)) {
+ dev_err(dev, "Failed to get AUX clock");
+ return PTR_ERR(vpu->aux_clk);
+ }
+
+ vpu->irq = platform_get_irq(pdev, 0);
+ if (vpu->irq < 0) {
+ dev_err(dev, "Failed to get platform IRQ");
+ return vpu->irq;
+ }
+
+ ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU",
rproc);
+ if (ret < 0) {
+ dev_err(dev, "Failed to request IRQ");
+ return ret;
+ }
+
+ disable_irq_nosync(vpu->irq);
+
+ ret = rproc_add(rproc);
+ if (ret) {
+ dev_err(dev, "Failed to register remote processor");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, ingenic_rproc_unregister,
rproc);
+ if (ret) {
+ dev_err(dev, "Unable to add action");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver ingenic_rproc_driver = {
+ .probe = ingenic_rproc_probe,
+ .driver = {
+ .name = "ingenic-vpu",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ingenic_rproc_of_matches),
+ },
+};
+module_platform_driver(ingenic_rproc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Paul Cercueil <paul@xxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
--
2.21.0.593.g511ec345e18