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-rw-r--r--target/linux/ramips/patches-3.8/0061-DMA-MIPS-ralink-add-dmaengine-driver.patch341
1 files changed, 0 insertions, 341 deletions
diff --git a/target/linux/ramips/patches-3.8/0061-DMA-MIPS-ralink-add-dmaengine-driver.patch b/target/linux/ramips/patches-3.8/0061-DMA-MIPS-ralink-add-dmaengine-driver.patch
deleted file mode 100644
index a2f8f09..0000000
--- a/target/linux/ramips/patches-3.8/0061-DMA-MIPS-ralink-add-dmaengine-driver.patch
+++ /dev/null
@@ -1,341 +0,0 @@
-From 1db0d19afe5830f7d020c7c5386be8cc20cf0f15 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Thu, 23 May 2013 18:45:29 +0200
-Subject: [PATCH 61/79] DMA: MIPS: ralink: add dmaengine driver
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/dma/Kconfig | 7 ++
- drivers/dma/Makefile | 1 +
- drivers/dma/ralink_gdma.c | 229 +++++++++++++++++++++++++++++++++++++++++++++
- drivers/dma/ralink_gdma.h | 55 +++++++++++
- 4 files changed, 292 insertions(+)
- create mode 100644 drivers/dma/ralink_gdma.c
- create mode 100644 drivers/dma/ralink_gdma.h
-
-diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
-index d4c1218..323f684 100644
---- a/drivers/dma/Kconfig
-+++ b/drivers/dma/Kconfig
-@@ -320,6 +320,13 @@ config MMP_PDMA
- help
- Support the MMP PDMA engine for PXA and MMP platfrom.
-
-+config RALINK_GDMA
-+ bool "Ralink Generic DMA support"
-+ depends on RALINK
-+ select DMA_ENGINE
-+ help
-+ Support the GDMA engine for MIPS based Ralink SoC.
-+
- config DMA_ENGINE
- bool
-
-diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
-index 7428fea..a981e2c 100644
---- a/drivers/dma/Makefile
-+++ b/drivers/dma/Makefile
-@@ -34,3 +34,4 @@ obj-$(CONFIG_DMA_SA11X0) += sa11x0-dma.o
- obj-$(CONFIG_MMP_TDMA) += mmp_tdma.o
- obj-$(CONFIG_DMA_OMAP) += omap-dma.o
- obj-$(CONFIG_MMP_PDMA) += mmp_pdma.o
-+obj-$(CONFIG_RALINK_GDMA) += ralink_gdma.o
-diff --git a/drivers/dma/ralink_gdma.c b/drivers/dma/ralink_gdma.c
-new file mode 100644
-index 0000000..be7c317
---- /dev/null
-+++ b/drivers/dma/ralink_gdma.c
-@@ -0,0 +1,229 @@
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/delay.h>
-+#include <linux/dma-mapping.h>
-+#include <linux/spinlock.h>
-+#include <linux/interrupt.h>
-+#include <linux/platform_device.h>
-+#include <linux/of_platform.h>
-+#include <linux/memory.h>
-+
-+#include "ralink_gdma.h"
-+
-+#define SURFBOARDINT_DMA 10
-+#define MEMCPY_DMA_CH 8
-+#define to_rt2880_dma_chan(chan) \
-+ container_of(chan, struct rt2880_dma_chan, common)
-+
-+static dma_cookie_t rt2880_dma_tx_submit(struct dma_async_tx_descriptor *tx)
-+{
-+ dma_cookie_t cookie;
-+
-+ cookie = tx->chan->cookie;
-+
-+ return cookie;
-+}
-+
-+#define MIN_RTDMA_PKT_LEN 128
-+static struct dma_async_tx_descriptor *
-+rt2880_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
-+ size_t len, unsigned long flags)
-+{
-+ struct rt2880_dma_chan *rt_chan = to_rt2880_dma_chan(chan);
-+ unsigned long mid_offset;
-+
-+ spin_lock_bh(&rt_chan->lock);
-+
-+ if(len < MIN_RTDMA_PKT_LEN) {
-+ memcpy(phys_to_virt(dest), phys_to_virt(src), len);
-+ } else {
-+ mid_offset = len/2;
-+
-+ /* Lower parts are transferred by GDMA.
-+ * Upper parts are transferred by CPU.
-+ */
-+ RT_DMA_WRITE_REG(RT_DMA_SRC_REG(MEMCPY_DMA_CH), src);
-+ RT_DMA_WRITE_REG(RT_DMA_DST_REG(MEMCPY_DMA_CH), dest);
-+ RT_DMA_WRITE_REG(RT_DMA_CTRL_REG(MEMCPY_DMA_CH), (mid_offset << 16) | (3 << 3) | (3 << 0));
-+
-+ memcpy(phys_to_virt(dest)+mid_offset, phys_to_virt(src)+mid_offset, len-mid_offset);
-+
-+ dma_async_tx_descriptor_init(&rt_chan->txd, chan);
-+
-+ while((RT_DMA_READ_REG(RT_DMA_DONEINT) & (0x1<<MEMCPY_DMA_CH))==0);
-+ RT_DMA_WRITE_REG(RT_DMA_DONEINT, (1<<MEMCPY_DMA_CH));
-+ }
-+
-+ spin_unlock_bh(&rt_chan->lock);
-+
-+ return &rt_chan->txd;
-+}
-+
-+/**
-+ * rt2880_dma_status - poll the status of an XOR transaction
-+ * @chan: XOR channel handle
-+ * @cookie: XOR transaction identifier
-+ * @txstate: XOR transactions state holder (or NULL)
-+ */
-+static enum dma_status rt2880_dma_status(struct dma_chan *chan,
-+ dma_cookie_t cookie,
-+ struct dma_tx_state *txstate)
-+{
-+ return 0;
-+}
-+
-+static irqreturn_t rt2880_dma_interrupt_handler(int irq, void *data)
-+{
-+
-+ printk("%s\n",__FUNCTION__);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static void rt2880_dma_issue_pending(struct dma_chan *chan)
-+{
-+}
-+
-+static int rt2880_dma_alloc_chan_resources(struct dma_chan *chan)
-+{
-+// printk("%s\n",__FUNCTION__);
-+
-+ return 0;
-+}
-+
-+static void rt2880_dma_free_chan_resources(struct dma_chan *chan)
-+{
-+// printk("%s\n",__FUNCTION__);
-+
-+}
-+
-+static int rt2880_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg)
-+{
-+ switch (cmd) {
-+ case DMA_TERMINATE_ALL:
-+ printk("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-+ break;
-+ case DMA_SLAVE_CONFIG:
-+ printk("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-+ break;
-+ default:
-+ return -ENXIO;
-+ }
-+
-+ return 0;
-+}
-+
-+static int rt2880_dma_probe(struct platform_device *pdev)
-+{
-+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ __iomem void *membase;
-+ struct dma_device *dma_dev;
-+ struct rt2880_dma_chan *rt_chan;
-+ int err;
-+ int ret;
-+ int reg;
-+ int irq;
-+
-+ membase = devm_request_and_ioremap(&pdev->dev, res);
-+ if (IS_ERR(membase))
-+ return PTR_ERR(membase);
-+
-+ dma_dev = devm_kzalloc(&pdev->dev, sizeof(*dma_dev), GFP_KERNEL);
-+ if (!dma_dev)
-+ return -ENOMEM;
-+
-+ irq = platform_get_irq(pdev, 0);
-+ if (!irq) {
-+ dev_err(&pdev->dev, "failed to load irq\n");
-+ return -ENOENT;
-+ }
-+
-+
-+ INIT_LIST_HEAD(&dma_dev->channels);
-+ dma_cap_zero(dma_dev->cap_mask);
-+ dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
-+ dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
-+ dma_dev->device_alloc_chan_resources = rt2880_dma_alloc_chan_resources;
-+ dma_dev->device_free_chan_resources = rt2880_dma_free_chan_resources;
-+ dma_dev->device_tx_status = rt2880_dma_status;
-+ dma_dev->device_issue_pending = rt2880_dma_issue_pending;
-+ dma_dev->device_prep_dma_memcpy = rt2880_dma_prep_dma_memcpy;
-+ dma_dev->device_control = rt2880_dma_control;
-+ dma_dev->dev = &pdev->dev;
-+
-+ rt_chan = devm_kzalloc(&pdev->dev, sizeof(*rt_chan), GFP_KERNEL);
-+ if (!rt_chan) {
-+ return -ENOMEM;
-+ }
-+
-+ spin_lock_init(&rt_chan->lock);
-+ INIT_LIST_HEAD(&rt_chan->chain);
-+ INIT_LIST_HEAD(&rt_chan->completed_slots);
-+ INIT_LIST_HEAD(&rt_chan->all_slots);
-+ rt_chan->common.device = dma_dev;
-+ rt_chan->txd.tx_submit = rt2880_dma_tx_submit;
-+
-+ list_add_tail(&rt_chan->common.device_node, &dma_dev->channels);
-+
-+ err = dma_async_device_register(dma_dev);
-+ if (0 != err) {
-+ pr_err("ERR_MDMA:device_register failed: %d\n", err);
-+ return 1;
-+ }
-+
-+ ret = request_irq(irq, rt2880_dma_interrupt_handler, 0, dev_name(&pdev->dev), NULL);
-+ if(ret){
-+ pr_err("IRQ %d is not free.\n", SURFBOARDINT_DMA);
-+ return 1;
-+ }
-+
-+ //set GDMA register in advance.
-+ reg = (32 << 16) | (32 << 8) | (MEMCPY_DMA_CH << 3);
-+ RT_DMA_WRITE_REG(RT_DMA_CTRL_REG1(MEMCPY_DMA_CH), reg);
-+
-+ dev_info(&pdev->dev, "running\n");
-+
-+ return 0;
-+}
-+
-+static int rt2880_dma_remove(struct platform_device *dev)
-+{
-+ struct dma_device *dma_dev = platform_get_drvdata(dev);
-+
-+ printk("%s\n",__FUNCTION__);
-+
-+ dma_async_device_unregister(dma_dev);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id rt2880_dma_match[] = {
-+ { .compatible = "ralink,rt2880-gdma" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, rt2880_wdt_match);
-+
-+static struct platform_driver rt2880_dma_driver = {
-+ .probe = rt2880_dma_probe,
-+ .remove = rt2880_dma_remove,
-+ .driver = {
-+ .owner = THIS_MODULE,
-+ .name = RT_DMA_NAME,
-+ .of_match_table = rt2880_dma_match,
-+ },
-+};
-+
-+static int __init rt2880_dma_init(void)
-+{
-+ int rc;
-+
-+ rc = platform_driver_register(&rt2880_dma_driver);
-+ return rc;
-+}
-+module_init(rt2880_dma_init);
-+
-+MODULE_AUTHOR("Steven Liu <steven_liu@mediatek.com>");
-+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
-+MODULE_DESCRIPTION("DMA engine driver for Ralink DMA engine");
-+MODULE_LICENSE("GPL");
-diff --git a/drivers/dma/ralink_gdma.h b/drivers/dma/ralink_gdma.h
-new file mode 100644
-index 0000000..73e1948
---- /dev/null
-+++ b/drivers/dma/ralink_gdma.h
-@@ -0,0 +1,55 @@
-+/*
-+ * Copyright (C) 2007, 2008, Marvell International Ltd.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms and conditions of the GNU General Public License,
-+ * version 2, as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope it will be useful, but WITHOUT
-+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-+ * for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software Foundation,
-+ * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-+ */
-+
-+#ifndef RT_DMA_H
-+#define RT_DMA_H
-+
-+#include <linux/types.h>
-+#include <linux/io.h>
-+#include <linux/dmaengine.h>
-+#include <linux/interrupt.h>
-+
-+#define RT_DMA_NAME "rt2880_dma"
-+
-+#define RALINK_GDMA_BASE 0xB0002800
-+
-+struct rt2880_dma_chan {
-+ int pending;
-+ dma_cookie_t completed_cookie;
-+ spinlock_t lock; /* protects the descriptor slot pool */
-+ void __iomem *mmr_base;
-+ unsigned int idx;
-+ enum dma_transaction_type current_type;
-+ struct dma_async_tx_descriptor txd;
-+ struct list_head chain;
-+ struct list_head completed_slots;
-+ struct dma_chan common;
-+ struct list_head all_slots;
-+ int slots_allocated;
-+ struct tasklet_struct irq_tasklet;
-+};
-+
-+#define RT_DMA_READ_REG(addr) le32_to_cpu(*(volatile u32 *)(addr))
-+#define RT_DMA_WRITE_REG(addr, val) *((volatile uint32_t *)(addr)) = cpu_to_le32(val)
-+
-+#define RT_DMA_SRC_REG(ch) (RALINK_GDMA_BASE + ch*16)
-+#define RT_DMA_DST_REG(ch) (RT_DMA_SRC_REG(ch) + 4)
-+#define RT_DMA_CTRL_REG(ch) (RT_DMA_DST_REG(ch) + 4)
-+#define RT_DMA_CTRL_REG1(ch) (RT_DMA_CTRL_REG(ch) + 4)
-+#define RT_DMA_DONEINT (RALINK_GDMA_BASE + 0x204)
-+
-+#endif
---
-1.7.10.4
-
generated by cgit v1.1 at 2024-07-03 15:44:31 +0000