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-rw-r--r--target/linux/xburst/patches-2.6.35/010-dma.patch404
1 files changed, 0 insertions, 404 deletions
diff --git a/target/linux/xburst/patches-2.6.35/010-dma.patch b/target/linux/xburst/patches-2.6.35/010-dma.patch
deleted file mode 100644
index 17f5dd2..0000000
--- a/target/linux/xburst/patches-2.6.35/010-dma.patch
+++ /dev/null
@@ -1,404 +0,0 @@
-From ced95a5a9d7a3ba168e8518d9b5004c9a0cad1fe Mon Sep 17 00:00:00 2001
-From: Lars-Peter Clausen <lars@metafoo.de>
-Date: Sat, 19 Jun 2010 04:08:14 +0000
-Subject: [PATCH] MIPS: JZ4740: Add DMA support.
-
-Add support for DMA transfers on JZ4740 SoCs.
-
-Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
-Cc: linux-mips@linux-mips.org
-Cc: linux-kernel@vger.kernel.org
-Patchwork: https://patchwork.linux-mips.org/patch/1401/
-Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
----
- arch/mips/include/asm/mach-jz4740/dma.h | 90 ++++++++++
- arch/mips/jz4740/dma.c | 289 +++++++++++++++++++++++++++++++
- 2 files changed, 379 insertions(+), 0 deletions(-)
- create mode 100644 arch/mips/include/asm/mach-jz4740/dma.h
- create mode 100644 arch/mips/jz4740/dma.c
-
---- /dev/null
-+++ b/arch/mips/include/asm/mach-jz4740/dma.h
-@@ -0,0 +1,90 @@
-+/*
-+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
-+ * JZ7420/JZ4740 DMA definitions
-+ *
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License as published by the
-+ * Free Software Foundation; either version 2 of the License, or (at your
-+ * option) any later version.
-+ *
-+ * 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.,
-+ * 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ */
-+
-+#ifndef __ASM_MACH_JZ4740_DMA_H__
-+#define __ASM_MACH_JZ4740_DMA_H__
-+
-+struct jz4740_dma_chan;
-+
-+enum jz4740_dma_request_type {
-+ JZ4740_DMA_TYPE_AUTO_REQUEST = 8,
-+ JZ4740_DMA_TYPE_UART_TRANSMIT = 20,
-+ JZ4740_DMA_TYPE_UART_RECEIVE = 21,
-+ JZ4740_DMA_TYPE_SPI_TRANSMIT = 22,
-+ JZ4740_DMA_TYPE_SPI_RECEIVE = 23,
-+ JZ4740_DMA_TYPE_AIC_TRANSMIT = 24,
-+ JZ4740_DMA_TYPE_AIC_RECEIVE = 25,
-+ JZ4740_DMA_TYPE_MMC_TRANSMIT = 26,
-+ JZ4740_DMA_TYPE_MMC_RECEIVE = 27,
-+ JZ4740_DMA_TYPE_TCU = 28,
-+ JZ4740_DMA_TYPE_SADC = 29,
-+ JZ4740_DMA_TYPE_SLCD = 30,
-+};
-+
-+enum jz4740_dma_width {
-+ JZ4740_DMA_WIDTH_32BIT = 0,
-+ JZ4740_DMA_WIDTH_8BIT = 1,
-+ JZ4740_DMA_WIDTH_16BIT = 2,
-+};
-+
-+enum jz4740_dma_transfer_size {
-+ JZ4740_DMA_TRANSFER_SIZE_4BYTE = 0,
-+ JZ4740_DMA_TRANSFER_SIZE_1BYTE = 1,
-+ JZ4740_DMA_TRANSFER_SIZE_2BYTE = 2,
-+ JZ4740_DMA_TRANSFER_SIZE_16BYTE = 3,
-+ JZ4740_DMA_TRANSFER_SIZE_32BYTE = 4,
-+};
-+
-+enum jz4740_dma_flags {
-+ JZ4740_DMA_SRC_AUTOINC = 0x2,
-+ JZ4740_DMA_DST_AUTOINC = 0x1,
-+};
-+
-+enum jz4740_dma_mode {
-+ JZ4740_DMA_MODE_SINGLE = 0,
-+ JZ4740_DMA_MODE_BLOCK = 1,
-+};
-+
-+struct jz4740_dma_config {
-+ enum jz4740_dma_width src_width;
-+ enum jz4740_dma_width dst_width;
-+ enum jz4740_dma_transfer_size transfer_size;
-+ enum jz4740_dma_request_type request_type;
-+ enum jz4740_dma_flags flags;
-+ enum jz4740_dma_mode mode;
-+};
-+
-+typedef void (*jz4740_dma_complete_callback_t)(struct jz4740_dma_chan *, int, void *);
-+
-+struct jz4740_dma_chan *jz4740_dma_request(void *dev, const char *name);
-+void jz4740_dma_free(struct jz4740_dma_chan *dma);
-+
-+void jz4740_dma_configure(struct jz4740_dma_chan *dma,
-+ const struct jz4740_dma_config *config);
-+
-+
-+void jz4740_dma_enable(struct jz4740_dma_chan *dma);
-+void jz4740_dma_disable(struct jz4740_dma_chan *dma);
-+
-+void jz4740_dma_set_src_addr(struct jz4740_dma_chan *dma, dma_addr_t src);
-+void jz4740_dma_set_dst_addr(struct jz4740_dma_chan *dma, dma_addr_t dst);
-+void jz4740_dma_set_transfer_count(struct jz4740_dma_chan *dma, uint32_t count);
-+
-+uint32_t jz4740_dma_get_residue(const struct jz4740_dma_chan *dma);
-+
-+void jz4740_dma_set_complete_cb(struct jz4740_dma_chan *dma,
-+ jz4740_dma_complete_callback_t cb);
-+
-+#endif /* __ASM_JZ4740_DMA_H__ */
---- /dev/null
-+++ b/arch/mips/jz4740/dma.c
-@@ -0,0 +1,289 @@
-+/*
-+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
-+ * JZ4740 SoC DMA support
-+ *
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License as published by the
-+ * Free Software Foundation; either version 2 of the License, or (at your
-+ * option) any later version.
-+ *
-+ * 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.,
-+ * 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/spinlock.h>
-+#include <linux/interrupt.h>
-+
-+#include <linux/dma-mapping.h>
-+#include <asm/mach-jz4740/dma.h>
-+#include <asm/mach-jz4740/base.h>
-+
-+#define JZ_REG_DMA_SRC_ADDR(x) (0x00 + (x) * 0x20)
-+#define JZ_REG_DMA_DST_ADDR(x) (0x04 + (x) * 0x20)
-+#define JZ_REG_DMA_TRANSFER_COUNT(x) (0x08 + (x) * 0x20)
-+#define JZ_REG_DMA_REQ_TYPE(x) (0x0C + (x) * 0x20)
-+#define JZ_REG_DMA_STATUS_CTRL(x) (0x10 + (x) * 0x20)
-+#define JZ_REG_DMA_CMD(x) (0x14 + (x) * 0x20)
-+#define JZ_REG_DMA_DESC_ADDR(x) (0x18 + (x) * 0x20)
-+
-+#define JZ_REG_DMA_CTRL 0x300
-+#define JZ_REG_DMA_IRQ 0x304
-+#define JZ_REG_DMA_DOORBELL 0x308
-+#define JZ_REG_DMA_DOORBELL_SET 0x30C
-+
-+#define JZ_DMA_STATUS_CTRL_NO_DESC BIT(31)
-+#define JZ_DMA_STATUS_CTRL_DESC_INV BIT(6)
-+#define JZ_DMA_STATUS_CTRL_ADDR_ERR BIT(4)
-+#define JZ_DMA_STATUS_CTRL_TRANSFER_DONE BIT(3)
-+#define JZ_DMA_STATUS_CTRL_HALT BIT(2)
-+#define JZ_DMA_STATUS_CTRL_COUNT_TERMINATE BIT(1)
-+#define JZ_DMA_STATUS_CTRL_ENABLE BIT(0)
-+
-+#define JZ_DMA_CMD_SRC_INC BIT(23)
-+#define JZ_DMA_CMD_DST_INC BIT(22)
-+#define JZ_DMA_CMD_RDIL_MASK (0xf << 16)
-+#define JZ_DMA_CMD_SRC_WIDTH_MASK (0x3 << 14)
-+#define JZ_DMA_CMD_DST_WIDTH_MASK (0x3 << 12)
-+#define JZ_DMA_CMD_INTERVAL_LENGTH_MASK (0x7 << 8)
-+#define JZ_DMA_CMD_BLOCK_MODE BIT(7)
-+#define JZ_DMA_CMD_DESC_VALID BIT(4)
-+#define JZ_DMA_CMD_DESC_VALID_MODE BIT(3)
-+#define JZ_DMA_CMD_VALID_IRQ_ENABLE BIT(2)
-+#define JZ_DMA_CMD_TRANSFER_IRQ_ENABLE BIT(1)
-+#define JZ_DMA_CMD_LINK_ENABLE BIT(0)
-+
-+#define JZ_DMA_CMD_FLAGS_OFFSET 22
-+#define JZ_DMA_CMD_RDIL_OFFSET 16
-+#define JZ_DMA_CMD_SRC_WIDTH_OFFSET 14
-+#define JZ_DMA_CMD_DST_WIDTH_OFFSET 12
-+#define JZ_DMA_CMD_TRANSFER_SIZE_OFFSET 8
-+#define JZ_DMA_CMD_MODE_OFFSET 7
-+
-+#define JZ_DMA_CTRL_PRIORITY_MASK (0x3 << 8)
-+#define JZ_DMA_CTRL_HALT BIT(3)
-+#define JZ_DMA_CTRL_ADDRESS_ERROR BIT(2)
-+#define JZ_DMA_CTRL_ENABLE BIT(0)
-+
-+
-+static void __iomem *jz4740_dma_base;
-+static spinlock_t jz4740_dma_lock;
-+
-+static inline uint32_t jz4740_dma_read(size_t reg)
-+{
-+ return readl(jz4740_dma_base + reg);
-+}
-+
-+static inline void jz4740_dma_write(size_t reg, uint32_t val)
-+{
-+ writel(val, jz4740_dma_base + reg);
-+}
-+
-+static inline void jz4740_dma_write_mask(size_t reg, uint32_t val, uint32_t mask)
-+{
-+ uint32_t val2;
-+ val2 = jz4740_dma_read(reg);
-+ val2 &= ~mask;
-+ val2 |= val;
-+ jz4740_dma_write(reg, val2);
-+}
-+
-+struct jz4740_dma_chan {
-+ unsigned int id;
-+ void *dev;
-+ const char *name;
-+
-+ enum jz4740_dma_flags flags;
-+ uint32_t transfer_shift;
-+
-+ jz4740_dma_complete_callback_t complete_cb;
-+
-+ unsigned used:1;
-+};
-+
-+#define JZ4740_DMA_CHANNEL(_id) { .id = _id }
-+
-+struct jz4740_dma_chan jz4740_dma_channels[] = {
-+ JZ4740_DMA_CHANNEL(0),
-+ JZ4740_DMA_CHANNEL(1),
-+ JZ4740_DMA_CHANNEL(2),
-+ JZ4740_DMA_CHANNEL(3),
-+ JZ4740_DMA_CHANNEL(4),
-+ JZ4740_DMA_CHANNEL(5),
-+};
-+
-+struct jz4740_dma_chan *jz4740_dma_request(void *dev, const char *name)
-+{
-+ unsigned int i;
-+ struct jz4740_dma_chan *dma = NULL;
-+
-+ spin_lock(&jz4740_dma_lock);
-+
-+ for (i = 0; i < ARRAY_SIZE(jz4740_dma_channels); ++i) {
-+ if (!jz4740_dma_channels[i].used) {
-+ dma = &jz4740_dma_channels[i];
-+ dma->used = 1;
-+ break;
-+ }
-+ }
-+
-+ spin_unlock(&jz4740_dma_lock);
-+
-+ if (!dma)
-+ return NULL;
-+
-+ dma->dev = dev;
-+ dma->name = name;
-+
-+ return dma;
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_request);
-+
-+void jz4740_dma_configure(struct jz4740_dma_chan *dma,
-+ const struct jz4740_dma_config *config)
-+{
-+ uint32_t cmd;
-+
-+ switch (config->transfer_size) {
-+ case JZ4740_DMA_TRANSFER_SIZE_2BYTE:
-+ dma->transfer_shift = 1;
-+ break;
-+ case JZ4740_DMA_TRANSFER_SIZE_4BYTE:
-+ dma->transfer_shift = 2;
-+ break;
-+ case JZ4740_DMA_TRANSFER_SIZE_16BYTE:
-+ dma->transfer_shift = 4;
-+ break;
-+ case JZ4740_DMA_TRANSFER_SIZE_32BYTE:
-+ dma->transfer_shift = 5;
-+ break;
-+ default:
-+ dma->transfer_shift = 0;
-+ break;
-+ }
-+
-+ cmd = config->flags << JZ_DMA_CMD_FLAGS_OFFSET;
-+ cmd |= config->src_width << JZ_DMA_CMD_SRC_WIDTH_OFFSET;
-+ cmd |= config->dst_width << JZ_DMA_CMD_DST_WIDTH_OFFSET;
-+ cmd |= config->transfer_size << JZ_DMA_CMD_TRANSFER_SIZE_OFFSET;
-+ cmd |= config->mode << JZ_DMA_CMD_MODE_OFFSET;
-+ cmd |= JZ_DMA_CMD_TRANSFER_IRQ_ENABLE;
-+
-+ jz4740_dma_write(JZ_REG_DMA_CMD(dma->id), cmd);
-+ jz4740_dma_write(JZ_REG_DMA_STATUS_CTRL(dma->id), 0);
-+ jz4740_dma_write(JZ_REG_DMA_REQ_TYPE(dma->id), config->request_type);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_configure);
-+
-+void jz4740_dma_set_src_addr(struct jz4740_dma_chan *dma, dma_addr_t src)
-+{
-+ jz4740_dma_write(JZ_REG_DMA_SRC_ADDR(dma->id), src);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_set_src_addr);
-+
-+void jz4740_dma_set_dst_addr(struct jz4740_dma_chan *dma, dma_addr_t dst)
-+{
-+ jz4740_dma_write(JZ_REG_DMA_DST_ADDR(dma->id), dst);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_set_dst_addr);
-+
-+void jz4740_dma_set_transfer_count(struct jz4740_dma_chan *dma, uint32_t count)
-+{
-+ count >>= dma->transfer_shift;
-+ jz4740_dma_write(JZ_REG_DMA_TRANSFER_COUNT(dma->id), count);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_set_transfer_count);
-+
-+void jz4740_dma_set_complete_cb(struct jz4740_dma_chan *dma,
-+ jz4740_dma_complete_callback_t cb)
-+{
-+ dma->complete_cb = cb;
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_set_complete_cb);
-+
-+void jz4740_dma_free(struct jz4740_dma_chan *dma)
-+{
-+ dma->dev = NULL;
-+ dma->complete_cb = NULL;
-+ dma->used = 0;
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_free);
-+
-+void jz4740_dma_enable(struct jz4740_dma_chan *dma)
-+{
-+ jz4740_dma_write_mask(JZ_REG_DMA_STATUS_CTRL(dma->id),
-+ JZ_DMA_STATUS_CTRL_NO_DESC | JZ_DMA_STATUS_CTRL_ENABLE,
-+ JZ_DMA_STATUS_CTRL_HALT | JZ_DMA_STATUS_CTRL_NO_DESC |
-+ JZ_DMA_STATUS_CTRL_ENABLE);
-+
-+ jz4740_dma_write_mask(JZ_REG_DMA_CTRL,
-+ JZ_DMA_CTRL_ENABLE,
-+ JZ_DMA_CTRL_HALT | JZ_DMA_CTRL_ENABLE);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_enable);
-+
-+void jz4740_dma_disable(struct jz4740_dma_chan *dma)
-+{
-+ jz4740_dma_write_mask(JZ_REG_DMA_STATUS_CTRL(dma->id), 0,
-+ JZ_DMA_STATUS_CTRL_ENABLE);
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_disable);
-+
-+uint32_t jz4740_dma_get_residue(const struct jz4740_dma_chan *dma)
-+{
-+ uint32_t residue;
-+ residue = jz4740_dma_read(JZ_REG_DMA_TRANSFER_COUNT(dma->id));
-+ return residue << dma->transfer_shift;
-+}
-+EXPORT_SYMBOL_GPL(jz4740_dma_get_residue);
-+
-+static void jz4740_dma_chan_irq(struct jz4740_dma_chan *dma)
-+{
-+ uint32_t status;
-+
-+ status = jz4740_dma_read(JZ_REG_DMA_STATUS_CTRL(dma->id));
-+
-+ jz4740_dma_write_mask(JZ_REG_DMA_STATUS_CTRL(dma->id), 0,
-+ JZ_DMA_STATUS_CTRL_ENABLE | JZ_DMA_STATUS_CTRL_TRANSFER_DONE);
-+
-+ if (dma->complete_cb)
-+ dma->complete_cb(dma, 0, dma->dev);
-+}
-+
-+static irqreturn_t jz4740_dma_irq(int irq, void *dev_id)
-+{
-+ uint32_t irq_status;
-+ unsigned int i;
-+
-+ irq_status = readl(jz4740_dma_base + JZ_REG_DMA_IRQ);
-+
-+ for (i = 0; i < 6; ++i) {
-+ if (irq_status & (1 << i))
-+ jz4740_dma_chan_irq(&jz4740_dma_channels[i]);
-+ }
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static int jz4740_dma_init(void)
-+{
-+ unsigned int ret;
-+
-+ jz4740_dma_base = ioremap(JZ4740_DMAC_BASE_ADDR, 0x400);
-+
-+ if (!jz4740_dma_base)
-+ return -EBUSY;
-+
-+ spin_lock_init(&jz4740_dma_lock);
-+
-+ ret = request_irq(JZ4740_IRQ_DMAC, jz4740_dma_irq, 0, "DMA", NULL);
-+
-+ if (ret)
-+ printk(KERN_ERR "JZ4740 DMA: Failed to request irq: %d\n", ret);
-+
-+ return ret;
-+}
-+arch_initcall(jz4740_dma_init);
generated by cgit v1.1 at 2024-11-29 13:20:50 +0000