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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-05-08 18:29:27 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-05-08 18:29:27 -0700
commitd585a021c0b10b0477d6b608c53e1feb8cde0507 (patch)
tree5ca059da1db7f15d4b29427644ad9c08270c885c /arch/arm/mach-ep93xx
parent84e5b0d00f8f84c4ae226be131d4bebbcee88bd3 (diff)
parent091bf7624d1c90cec9e578a18529f615213ff847 (diff)
downloadblackbird-op-linux-d585a021c0b10b0477d6b608c53e1feb8cde0507.tar.gz
blackbird-op-linux-d585a021c0b10b0477d6b608c53e1feb8cde0507.zip
Merge commit 'v2.6.30-rc5' into next
Diffstat (limited to 'arch/arm/mach-ep93xx')
-rw-r--r--arch/arm/mach-ep93xx/Makefile2
-rw-r--r--arch/arm/mach-ep93xx/clock.c79
-rw-r--r--arch/arm/mach-ep93xx/core.c2
-rw-r--r--arch/arm/mach-ep93xx/dma-m2p.c408
-rw-r--r--arch/arm/mach-ep93xx/edb9307a.c12
-rw-r--r--arch/arm/mach-ep93xx/include/mach/dma.h52
-rw-r--r--arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h3
-rw-r--r--arch/arm/mach-ep93xx/include/mach/platform.h2
-rw-r--r--arch/arm/mach-ep93xx/include/mach/system.h2
9 files changed, 558 insertions, 4 deletions
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
index 944e42d51646..9522e205b73f 100644
--- a/arch/arm/mach-ep93xx/Makefile
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -1,7 +1,7 @@
#
# Makefile for the linux kernel.
#
-obj-y := core.o clock.o gpio.o
+obj-y := core.o clock.o dma-m2p.o gpio.o
obj-m :=
obj-n :=
obj- :=
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 96049283a10a..e8ebeaea6c48 100644
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -41,6 +41,56 @@ static struct clk clk_usb_host = {
.enable_mask = EP93XX_SYSCON_CLOCK_USH_EN,
};
+/* DMA Clocks */
+static struct clk clk_m2p0 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00020000,
+};
+static struct clk clk_m2p1 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00010000,
+};
+static struct clk clk_m2p2 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00080000,
+};
+static struct clk clk_m2p3 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00040000,
+};
+static struct clk clk_m2p4 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00200000,
+};
+static struct clk clk_m2p5 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00100000,
+};
+static struct clk clk_m2p6 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00800000,
+};
+static struct clk clk_m2p7 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x00400000,
+};
+static struct clk clk_m2p8 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x02000000,
+};
+static struct clk clk_m2p9 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x01000000,
+};
+static struct clk clk_m2m0 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x04000000,
+};
+static struct clk clk_m2m1 = {
+ .enable_reg = EP93XX_SYSCON_CLOCK_CONTROL,
+ .enable_mask = 0x08000000,
+};
+
#define INIT_CK(dev,con,ck) \
{ .dev_id = dev, .con_id = con, .clk = ck }
@@ -54,6 +104,18 @@ static struct clk_lookup clocks[] = {
INIT_CK(NULL, "pclk", &clk_p),
INIT_CK(NULL, "pll2", &clk_pll2),
INIT_CK(NULL, "usb_host", &clk_usb_host),
+ INIT_CK(NULL, "m2p0", &clk_m2p0),
+ INIT_CK(NULL, "m2p1", &clk_m2p1),
+ INIT_CK(NULL, "m2p2", &clk_m2p2),
+ INIT_CK(NULL, "m2p3", &clk_m2p3),
+ INIT_CK(NULL, "m2p4", &clk_m2p4),
+ INIT_CK(NULL, "m2p5", &clk_m2p5),
+ INIT_CK(NULL, "m2p6", &clk_m2p6),
+ INIT_CK(NULL, "m2p7", &clk_m2p7),
+ INIT_CK(NULL, "m2p8", &clk_m2p8),
+ INIT_CK(NULL, "m2p9", &clk_m2p9),
+ INIT_CK(NULL, "m2m0", &clk_m2m0),
+ INIT_CK(NULL, "m2m1", &clk_m2m1),
};
@@ -110,6 +172,22 @@ static unsigned long calc_pll_rate(u32 config_word)
return (unsigned long)rate;
}
+static void __init ep93xx_dma_clock_init(void)
+{
+ clk_m2p0.rate = clk_h.rate;
+ clk_m2p1.rate = clk_h.rate;
+ clk_m2p2.rate = clk_h.rate;
+ clk_m2p3.rate = clk_h.rate;
+ clk_m2p4.rate = clk_h.rate;
+ clk_m2p5.rate = clk_h.rate;
+ clk_m2p6.rate = clk_h.rate;
+ clk_m2p7.rate = clk_h.rate;
+ clk_m2p8.rate = clk_h.rate;
+ clk_m2p9.rate = clk_h.rate;
+ clk_m2m0.rate = clk_h.rate;
+ clk_m2m1.rate = clk_h.rate;
+}
+
static int __init ep93xx_clock_init(void)
{
u32 value;
@@ -124,6 +202,7 @@ static int __init ep93xx_clock_init(void)
clk_f.rate = clk_pll1.rate / fclk_divisors[(value >> 25) & 0x7];
clk_h.rate = clk_pll1.rate / hclk_divisors[(value >> 20) & 0x7];
clk_p.rate = clk_h.rate / pclk_divisors[(value >> 18) & 0x3];
+ ep93xx_dma_clock_init();
value = __raw_readl(EP93XX_SYSCON_CLOCK_SET2);
if (!(value & 0x00080000)) { /* PLL2 bypassed? */
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 6d9152de6074..ae24486f858a 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -100,7 +100,7 @@ static unsigned int last_jiffy_time;
#define TIMER4_TICKS_PER_JIFFY ((CLOCK_TICK_RATE + (HZ/2)) / HZ)
-static int ep93xx_timer_interrupt(int irq, void *dev_id)
+static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
{
__raw_writel(1, EP93XX_TIMER1_CLEAR);
while ((signed long)
diff --git a/arch/arm/mach-ep93xx/dma-m2p.c b/arch/arm/mach-ep93xx/dma-m2p.c
new file mode 100644
index 000000000000..a2df5bb7dff0
--- /dev/null
+++ b/arch/arm/mach-ep93xx/dma-m2p.c
@@ -0,0 +1,408 @@
+/*
+ * arch/arm/mach-ep93xx/dma-m2p.c
+ * M2P DMA handling for Cirrus EP93xx chips.
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Copyright (C) 2006 Applied Data Systems
+ *
+ * Copyright (C) 2009 Ryan Mallon <ryan@bluewatersys.com>
+ *
+ * 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.
+ */
+
+/*
+ * On the EP93xx chip the following peripherals my be allocated to the 10
+ * Memory to Internal Peripheral (M2P) channels (5 transmit + 5 receive).
+ *
+ * I2S contains 3 Tx and 3 Rx DMA Channels
+ * AAC contains 3 Tx and 3 Rx DMA Channels
+ * UART1 contains 1 Tx and 1 Rx DMA Channels
+ * UART2 contains 1 Tx and 1 Rx DMA Channels
+ * UART3 contains 1 Tx and 1 Rx DMA Channels
+ * IrDA contains 1 Tx and 1 Rx DMA Channels
+ *
+ * SSP and IDE use the Memory to Memory (M2M) channels and are not covered
+ * with this implementation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <mach/dma.h>
+#include <mach/hardware.h>
+
+#define M2P_CONTROL 0x00
+#define M2P_CONTROL_STALL_IRQ_EN (1 << 0)
+#define M2P_CONTROL_NFB_IRQ_EN (1 << 1)
+#define M2P_CONTROL_ERROR_IRQ_EN (1 << 3)
+#define M2P_CONTROL_ENABLE (1 << 4)
+#define M2P_INTERRUPT 0x04
+#define M2P_INTERRUPT_STALL (1 << 0)
+#define M2P_INTERRUPT_NFB (1 << 1)
+#define M2P_INTERRUPT_ERROR (1 << 3)
+#define M2P_PPALLOC 0x08
+#define M2P_STATUS 0x0c
+#define M2P_REMAIN 0x14
+#define M2P_MAXCNT0 0x20
+#define M2P_BASE0 0x24
+#define M2P_MAXCNT1 0x30
+#define M2P_BASE1 0x34
+
+#define STATE_IDLE 0 /* Channel is inactive. */
+#define STATE_STALL 1 /* Channel is active, no buffers pending. */
+#define STATE_ON 2 /* Channel is active, one buffer pending. */
+#define STATE_NEXT 3 /* Channel is active, two buffers pending. */
+
+struct m2p_channel {
+ char *name;
+ void __iomem *base;
+ int irq;
+
+ struct clk *clk;
+ spinlock_t lock;
+
+ void *client;
+ unsigned next_slot:1;
+ struct ep93xx_dma_buffer *buffer_xfer;
+ struct ep93xx_dma_buffer *buffer_next;
+ struct list_head buffers_pending;
+};
+
+static struct m2p_channel m2p_rx[] = {
+ {"m2p1", EP93XX_DMA_BASE + 0x0040, IRQ_EP93XX_DMAM2P1},
+ {"m2p3", EP93XX_DMA_BASE + 0x00c0, IRQ_EP93XX_DMAM2P3},
+ {"m2p5", EP93XX_DMA_BASE + 0x0200, IRQ_EP93XX_DMAM2P5},
+ {"m2p7", EP93XX_DMA_BASE + 0x0280, IRQ_EP93XX_DMAM2P7},
+ {"m2p9", EP93XX_DMA_BASE + 0x0300, IRQ_EP93XX_DMAM2P9},
+ {NULL},
+};
+
+static struct m2p_channel m2p_tx[] = {
+ {"m2p0", EP93XX_DMA_BASE + 0x0000, IRQ_EP93XX_DMAM2P0},
+ {"m2p2", EP93XX_DMA_BASE + 0x0080, IRQ_EP93XX_DMAM2P2},
+ {"m2p4", EP93XX_DMA_BASE + 0x0240, IRQ_EP93XX_DMAM2P4},
+ {"m2p6", EP93XX_DMA_BASE + 0x02c0, IRQ_EP93XX_DMAM2P6},
+ {"m2p8", EP93XX_DMA_BASE + 0x0340, IRQ_EP93XX_DMAM2P8},
+ {NULL},
+};
+
+static void feed_buf(struct m2p_channel *ch, struct ep93xx_dma_buffer *buf)
+{
+ if (ch->next_slot == 0) {
+ writel(buf->size, ch->base + M2P_MAXCNT0);
+ writel(buf->bus_addr, ch->base + M2P_BASE0);
+ } else {
+ writel(buf->size, ch->base + M2P_MAXCNT1);
+ writel(buf->bus_addr, ch->base + M2P_BASE1);
+ }
+ ch->next_slot ^= 1;
+}
+
+static void choose_buffer_xfer(struct m2p_channel *ch)
+{
+ struct ep93xx_dma_buffer *buf;
+
+ ch->buffer_xfer = NULL;
+ if (!list_empty(&ch->buffers_pending)) {
+ buf = list_entry(ch->buffers_pending.next,
+ struct ep93xx_dma_buffer, list);
+ list_del(&buf->list);
+ feed_buf(ch, buf);
+ ch->buffer_xfer = buf;
+ }
+}
+
+static void choose_buffer_next(struct m2p_channel *ch)
+{
+ struct ep93xx_dma_buffer *buf;
+
+ ch->buffer_next = NULL;
+ if (!list_empty(&ch->buffers_pending)) {
+ buf = list_entry(ch->buffers_pending.next,
+ struct ep93xx_dma_buffer, list);
+ list_del(&buf->list);
+ feed_buf(ch, buf);
+ ch->buffer_next = buf;
+ }
+}
+
+static inline void m2p_set_control(struct m2p_channel *ch, u32 v)
+{
+ /*
+ * The control register must be read immediately after being written so
+ * that the internal state machine is correctly updated. See the ep93xx
+ * users' guide for details.
+ */
+ writel(v, ch->base + M2P_CONTROL);
+ readl(ch->base + M2P_CONTROL);
+}
+
+static inline int m2p_channel_state(struct m2p_channel *ch)
+{
+ return (readl(ch->base + M2P_STATUS) >> 4) & 0x3;
+}
+
+static irqreturn_t m2p_irq(int irq, void *dev_id)
+{
+ struct m2p_channel *ch = dev_id;
+ struct ep93xx_dma_m2p_client *cl;
+ u32 irq_status, v;
+ int error = 0;
+
+ cl = ch->client;
+
+ spin_lock(&ch->lock);
+ irq_status = readl(ch->base + M2P_INTERRUPT);
+
+ if (irq_status & M2P_INTERRUPT_ERROR) {
+ writel(M2P_INTERRUPT_ERROR, ch->base + M2P_INTERRUPT);
+ error = 1;
+ }
+
+ if ((irq_status & (M2P_INTERRUPT_STALL | M2P_INTERRUPT_NFB)) == 0) {
+ spin_unlock(&ch->lock);
+ return IRQ_NONE;
+ }
+
+ switch (m2p_channel_state(ch)) {
+ case STATE_IDLE:
+ pr_crit("m2p_irq: dma interrupt without a dma buffer\n");
+ BUG();
+ break;
+
+ case STATE_STALL:
+ cl->buffer_finished(cl->cookie, ch->buffer_xfer, 0, error);
+ if (ch->buffer_next != NULL) {
+ cl->buffer_finished(cl->cookie, ch->buffer_next,
+ 0, error);
+ }
+ choose_buffer_xfer(ch);
+ choose_buffer_next(ch);
+ if (ch->buffer_xfer != NULL)
+ cl->buffer_started(cl->cookie, ch->buffer_xfer);
+ break;
+
+ case STATE_ON:
+ cl->buffer_finished(cl->cookie, ch->buffer_xfer, 0, error);
+ ch->buffer_xfer = ch->buffer_next;
+ choose_buffer_next(ch);
+ cl->buffer_started(cl->cookie, ch->buffer_xfer);
+ break;
+
+ case STATE_NEXT:
+ pr_crit("m2p_irq: dma interrupt while next\n");
+ BUG();
+ break;
+ }
+
+ v = readl(ch->base + M2P_CONTROL) & ~(M2P_CONTROL_STALL_IRQ_EN |
+ M2P_CONTROL_NFB_IRQ_EN);
+ if (ch->buffer_xfer != NULL)
+ v |= M2P_CONTROL_STALL_IRQ_EN;
+ if (ch->buffer_next != NULL)
+ v |= M2P_CONTROL_NFB_IRQ_EN;
+ m2p_set_control(ch, v);
+
+ spin_unlock(&ch->lock);
+ return IRQ_HANDLED;
+}
+
+static struct m2p_channel *find_free_channel(struct ep93xx_dma_m2p_client *cl)
+{
+ struct m2p_channel *ch;
+ int i;
+
+ if (cl->flags & EP93XX_DMA_M2P_RX)
+ ch = m2p_rx;
+ else
+ ch = m2p_tx;
+
+ for (i = 0; ch[i].base; i++) {
+ struct ep93xx_dma_m2p_client *client;
+
+ client = ch[i].client;
+ if (client != NULL) {
+ int port;
+
+ port = cl->flags & EP93XX_DMA_M2P_PORT_MASK;
+ if (port == (client->flags &
+ EP93XX_DMA_M2P_PORT_MASK)) {
+ pr_warning("DMA channel already used by %s\n",
+ cl->name ? : "unknown client");
+ return ERR_PTR(-EBUSY);
+ }
+ }
+ }
+
+ for (i = 0; ch[i].base; i++) {
+ if (ch[i].client == NULL)
+ return ch + i;
+ }
+
+ pr_warning("No free DMA channel for %s\n",
+ cl->name ? : "unknown client");
+ return ERR_PTR(-ENODEV);
+}
+
+static void channel_enable(struct m2p_channel *ch)
+{
+ struct ep93xx_dma_m2p_client *cl = ch->client;
+ u32 v;
+
+ clk_enable(ch->clk);
+
+ v = cl->flags & EP93XX_DMA_M2P_PORT_MASK;
+ writel(v, ch->base + M2P_PPALLOC);
+
+ v = cl->flags & EP93XX_DMA_M2P_ERROR_MASK;
+ v |= M2P_CONTROL_ENABLE | M2P_CONTROL_ERROR_IRQ_EN;
+ m2p_set_control(ch, v);
+}
+
+static void channel_disable(struct m2p_channel *ch)
+{
+ u32 v;
+
+ v = readl(ch->base + M2P_CONTROL);
+ v &= ~(M2P_CONTROL_STALL_IRQ_EN | M2P_CONTROL_NFB_IRQ_EN);
+ m2p_set_control(ch, v);
+
+ while (m2p_channel_state(ch) == STATE_ON)
+ cpu_relax();
+
+ m2p_set_control(ch, 0x0);
+
+ while (m2p_channel_state(ch) == STATE_STALL)
+ cpu_relax();
+
+ clk_disable(ch->clk);
+}
+
+int ep93xx_dma_m2p_client_register(struct ep93xx_dma_m2p_client *cl)
+{
+ struct m2p_channel *ch;
+ int err;
+
+ ch = find_free_channel(cl);
+ if (IS_ERR(ch))
+ return PTR_ERR(ch);
+
+ err = request_irq(ch->irq, m2p_irq, 0, cl->name ? : "dma-m2p", ch);
+ if (err)
+ return err;
+
+ ch->client = cl;
+ ch->next_slot = 0;
+ ch->buffer_xfer = NULL;
+ ch->buffer_next = NULL;
+ INIT_LIST_HEAD(&ch->buffers_pending);
+
+ cl->channel = ch;
+
+ channel_enable(ch);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_client_register);
+
+void ep93xx_dma_m2p_client_unregister(struct ep93xx_dma_m2p_client *cl)
+{
+ struct m2p_channel *ch = cl->channel;
+
+ channel_disable(ch);
+ free_irq(ch->irq, ch);
+ ch->client = NULL;
+}
+EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_client_unregister);
+
+void ep93xx_dma_m2p_submit(struct ep93xx_dma_m2p_client *cl,
+ struct ep93xx_dma_buffer *buf)
+{
+ struct m2p_channel *ch = cl->channel;
+ unsigned long flags;
+ u32 v;
+
+ spin_lock_irqsave(&ch->lock, flags);
+ v = readl(ch->base + M2P_CONTROL);
+ if (ch->buffer_xfer == NULL) {
+ ch->buffer_xfer = buf;
+ feed_buf(ch, buf);
+ cl->buffer_started(cl->cookie, buf);
+
+ v |= M2P_CONTROL_STALL_IRQ_EN;
+ m2p_set_control(ch, v);
+
+ } else if (ch->buffer_next == NULL) {
+ ch->buffer_next = buf;
+ feed_buf(ch, buf);
+
+ v |= M2P_CONTROL_NFB_IRQ_EN;
+ m2p_set_control(ch, v);
+ } else {
+ list_add_tail(&buf->list, &ch->buffers_pending);
+ }
+ spin_unlock_irqrestore(&ch->lock, flags);
+}
+EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_submit);
+
+void ep93xx_dma_m2p_submit_recursive(struct ep93xx_dma_m2p_client *cl,
+ struct ep93xx_dma_buffer *buf)
+{
+ struct m2p_channel *ch = cl->channel;
+
+ list_add_tail(&buf->list, &ch->buffers_pending);
+}
+EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_submit_recursive);
+
+void ep93xx_dma_m2p_flush(struct ep93xx_dma_m2p_client *cl)
+{
+ struct m2p_channel *ch = cl->channel;
+
+ channel_disable(ch);
+ ch->next_slot = 0;
+ ch->buffer_xfer = NULL;
+ ch->buffer_next = NULL;
+ INIT_LIST_HEAD(&ch->buffers_pending);
+ channel_enable(ch);
+}
+EXPORT_SYMBOL_GPL(ep93xx_dma_m2p_flush);
+
+static int init_channel(struct m2p_channel *ch)
+{
+ ch->clk = clk_get(NULL, ch->name);
+ if (IS_ERR(ch->clk))
+ return PTR_ERR(ch->clk);
+
+ spin_lock_init(&ch->lock);
+ ch->client = NULL;
+
+ return 0;
+}
+
+static int __init ep93xx_dma_m2p_init(void)
+{
+ int i;
+ int ret;
+
+ for (i = 0; m2p_rx[i].base; i++) {
+ ret = init_channel(m2p_rx + i);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; m2p_tx[i].base; i++) {
+ ret = init_channel(m2p_tx + i);
+ if (ret)
+ return ret;
+ }
+
+ pr_info("M2P DMA subsystem initialized\n");
+ return 0;
+}
+arch_initcall(ep93xx_dma_m2p_init);
diff --git a/arch/arm/mach-ep93xx/edb9307a.c b/arch/arm/mach-ep93xx/edb9307a.c
index 5b5c22b681be..6171167d3315 100644
--- a/arch/arm/mach-ep93xx/edb9307a.c
+++ b/arch/arm/mach-ep93xx/edb9307a.c
@@ -48,12 +48,24 @@ static struct ep93xx_eth_data edb9307a_eth_data = {
.phy_id = 1,
};
+static struct i2c_board_info __initdata edb9307a_i2c_data[] = {
+ {
+ /* On-board battery backed RTC */
+ I2C_BOARD_INFO("isl1208", 0x6f),
+ },
+ /*
+ * The I2C signals are also routed to the Expansion Connector (J4)
+ */
+};
+
static void __init edb9307a_init_machine(void)
{
ep93xx_init_devices();
platform_device_register(&edb9307a_flash);
ep93xx_register_eth(&edb9307a_eth_data, 1);
+
+ ep93xx_init_i2c(edb9307a_i2c_data, ARRAY_SIZE(edb9307a_i2c_data));
}
MACHINE_START(EDB9307A, "Cirrus Logic EDB9307A Evaluation Board")
diff --git a/arch/arm/mach-ep93xx/include/mach/dma.h b/arch/arm/mach-ep93xx/include/mach/dma.h
new file mode 100644
index 000000000000..ef6bd9d13148
--- /dev/null
+++ b/arch/arm/mach-ep93xx/include/mach/dma.h
@@ -0,0 +1,52 @@
+#ifndef __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+
+struct ep93xx_dma_buffer {
+ struct list_head list;
+ u32 bus_addr;
+ u16 size;
+};
+
+struct ep93xx_dma_m2p_client {
+ char *name;
+ u8 flags;
+ void *cookie;
+ void (*buffer_started)(void *cookie,
+ struct ep93xx_dma_buffer *buf);
+ void (*buffer_finished)(void *cookie,
+ struct ep93xx_dma_buffer *buf,
+ int bytes, int error);
+
+ /* Internal to the DMA code. */
+ void *channel;
+};
+
+#define EP93XX_DMA_M2P_PORT_I2S1 0x00
+#define EP93XX_DMA_M2P_PORT_I2S2 0x01
+#define EP93XX_DMA_M2P_PORT_AAC1 0x02
+#define EP93XX_DMA_M2P_PORT_AAC2 0x03
+#define EP93XX_DMA_M2P_PORT_AAC3 0x04
+#define EP93XX_DMA_M2P_PORT_I2S3 0x05
+#define EP93XX_DMA_M2P_PORT_UART1 0x06
+#define EP93XX_DMA_M2P_PORT_UART2 0x07
+#define EP93XX_DMA_M2P_PORT_UART3 0x08
+#define EP93XX_DMA_M2P_PORT_IRDA 0x09
+#define EP93XX_DMA_M2P_PORT_MASK 0x0f
+#define EP93XX_DMA_M2P_TX 0x00
+#define EP93XX_DMA_M2P_RX 0x10
+#define EP93XX_DMA_M2P_ABORT_ON_ERROR 0x20
+#define EP93XX_DMA_M2P_IGNORE_ERROR 0x40
+#define EP93XX_DMA_M2P_ERROR_MASK 0x60
+
+int ep93xx_dma_m2p_client_register(struct ep93xx_dma_m2p_client *m2p);
+void ep93xx_dma_m2p_client_unregister(struct ep93xx_dma_m2p_client *m2p);
+void ep93xx_dma_m2p_submit(struct ep93xx_dma_m2p_client *m2p,
+ struct ep93xx_dma_buffer *buf);
+void ep93xx_dma_m2p_submit_recursive(struct ep93xx_dma_m2p_client *m2p,
+ struct ep93xx_dma_buffer *buf);
+void ep93xx_dma_m2p_flush(struct ep93xx_dma_m2p_client *m2p);
+
+#endif /* __ASM_ARCH_DMA_H */
diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
index 22d6c9a6e4ca..f66be12b856e 100644
--- a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
+++ b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
@@ -58,7 +58,8 @@
/* AHB peripherals */
-#define EP93XX_DMA_BASE (EP93XX_AHB_VIRT_BASE + 0x00000000)
+#define EP93XX_DMA_BASE ((void __iomem *) \
+ (EP93XX_AHB_VIRT_BASE + 0x00000000))
#define EP93XX_ETHERNET_BASE (EP93XX_AHB_VIRT_BASE + 0x00010000)
#define EP93XX_ETHERNET_PHYS_BASE (EP93XX_AHB_PHYS_BASE + 0x00010000)
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index 88f7e88f152f..05f0f4f2f3ce 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -4,6 +4,8 @@
#ifndef __ASSEMBLY__
+struct i2c_board_info;
+
struct ep93xx_eth_data
{
unsigned char dev_addr[6];
diff --git a/arch/arm/mach-ep93xx/include/mach/system.h b/arch/arm/mach-ep93xx/include/mach/system.h
index 67789d0f329e..ed8f35e4f068 100644
--- a/arch/arm/mach-ep93xx/include/mach/system.h
+++ b/arch/arm/mach-ep93xx/include/mach/system.h
@@ -9,7 +9,7 @@ static inline void arch_idle(void)
cpu_do_idle();
}
-static inline void arch_reset(char mode)
+static inline void arch_reset(char mode, const char *cmd)
{
u32 devicecfg;
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