There is no need for a separate common OMAP mailbox module
now that the OMAP1 mailbox driver has been removed. So,
consolidate the two individual OMAP mailbox modules into a
single driver. This streamlines the driver for converting
to mailbox framework.
The following are the main changes:
- collapse mailbox-omap2.c into omap-mailbox.c
- remove omap_mbox_ops and replace the ops calls with
the equivalent functionality.
- simplify the sub-mailbox startup/shutdown functionality,
the one-time operations are moved into probe, and the
pm_runtime_get_sync and pm_runtime_put_sync can be invoked
without using a configuration counter.
- move all definitions from private omap_mbox.h into the
source code, and eliminate this internal header.
- rename some variables that used the omap2_mbox prefix with
a generic omap_mbox prefix.
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
drivers/mailbox/Kconfig | 8 -
drivers/mailbox/Makefile | 4 +-
drivers/mailbox/mailbox-omap2.c | 333 ----------------------------------------
drivers/mailbox/omap-mailbox.c | 331 +++++++++++++++++++++++++++++++++------
drivers/mailbox/omap-mbox.h | 62 --------
5 files changed, 283 insertions(+), 455 deletions(-)
delete mode 100644 drivers/mailbox/mailbox-omap2.c
delete mode 100644 drivers/mailbox/omap-mbox.h
diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index 1ec8f4e..9fd9c67 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -16,17 +16,9 @@ config PL320_MBOX
Management Engine, primarily for cpufreq. Say Y here if you want
to use the PL320 IPCM support.
-config OMAP_MBOX
- tristate
- help
- This option is selected by any OMAP architecture specific mailbox
- driver such as CONFIG_OMAP2PLUS_MBOX. This enables the common OMAP
- mailbox framework code.
-
config OMAP2PLUS_MBOX
tristate "OMAP2+ Mailbox framework support"
depends on ARCH_OMAP2PLUS
- select OMAP_MBOX
help
Mailbox implementation for OMAP family chips with hardware for
interprocessor communication involving DSP, IVA1.0 and IVA2 in
diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile
index d023feb..6d184db 100644
--- a/drivers/mailbox/Makefile
+++ b/drivers/mailbox/Makefile
@@ -1,5 +1,3 @@
obj-$(CONFIG_PL320_MBOX) += pl320-ipc.o
-obj-$(CONFIG_OMAP_MBOX) += omap-mailbox.o
-obj-$(CONFIG_OMAP2PLUS_MBOX) += mailbox_omap2.o
-mailbox_omap2-objs := mailbox-omap2.o
+obj-$(CONFIG_OMAP2PLUS_MBOX) += omap-mailbox.o
diff --git a/drivers/mailbox/mailbox-omap2.c b/drivers/mailbox/mailbox-omap2.c
deleted file mode 100644
index 2c463d6..0000000
--- a/drivers/mailbox/mailbox-omap2.c
+++ /dev/null
@@ -1,333 +0,0 @@
-/*
- * Mailbox reservation modules for OMAP2/3
- *
- * Copyright (C) 2006-2009 Nokia Corporation
- * Written by: Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
- * and Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/pm_runtime.h>
-#include <linux/platform_data/mailbox-omap.h>
-
-#include "omap-mbox.h"
-
-#define MAILBOX_REVISION 0x000
-#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m))
-#define MAILBOX_FIFOSTATUS(m) (0x080 + 4 * (m))
-#define MAILBOX_MSGSTATUS(m) (0x0c0 + 4 * (m))
-
-#define OMAP2_MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u))
-#define OMAP2_MAILBOX_IRQENABLE(u) (0x104 + 8 * (u))
-
-#define OMAP4_MAILBOX_IRQSTATUS(u) (0x104 + 0x10 * (u))
-#define OMAP4_MAILBOX_IRQENABLE(u) (0x108 + 0x10 * (u))
-#define OMAP4_MAILBOX_IRQENABLE_CLR(u) (0x10c + 0x10 * (u))
-
-#define MAILBOX_IRQSTATUS(type, u) (type ? OMAP4_MAILBOX_IRQSTATUS(u) : \
- OMAP2_MAILBOX_IRQSTATUS(u))
-#define MAILBOX_IRQENABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE(u) : \
- OMAP2_MAILBOX_IRQENABLE(u))
-#define MAILBOX_IRQDISABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE_CLR(u) \
- : OMAP2_MAILBOX_IRQENABLE(u))
-
-#define MAILBOX_IRQ_NEWMSG(m) (1 << (2 * (m)))
-#define MAILBOX_IRQ_NOTFULL(m) (1 << (2 * (m) + 1))
-
-#define MBOX_REG_SIZE 0x120
-
-#define OMAP4_MBOX_REG_SIZE 0x130
-
-#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32))
-#define OMAP4_MBOX_NR_REGS (OMAP4_MBOX_REG_SIZE / sizeof(u32))
-
-static void __iomem *mbox_base;
-
-struct omap_mbox2_fifo {
- unsigned long msg;
- unsigned long fifo_stat;
- unsigned long msg_stat;
-};
-
-struct omap_mbox2_priv {
- struct omap_mbox2_fifo tx_fifo;
- struct omap_mbox2_fifo rx_fifo;
- unsigned long irqenable;
- unsigned long irqstatus;
- u32 newmsg_bit;
- u32 notfull_bit;
- u32 ctx[OMAP4_MBOX_NR_REGS];
- unsigned long irqdisable;
- u32 intr_type;
-};
-
-static inline unsigned int mbox_read_reg(size_t ofs)
-{
- return __raw_readl(mbox_base + ofs);
-}
-
-static inline void mbox_write_reg(u32 val, size_t ofs)
-{
- __raw_writel(val, mbox_base + ofs);
-}
-
-/* Mailbox H/W preparations */
-static int omap2_mbox_startup(struct omap_mbox *mbox)
-{
- u32 l;
-
- pm_runtime_enable(mbox->dev->parent);
- pm_runtime_get_sync(mbox->dev->parent);
-
- l = mbox_read_reg(MAILBOX_REVISION);
- pr_debug("omap mailbox rev %d.%d\n", (l & 0xf0) >> 4, (l & 0x0f));
-
- return 0;
-}
-
-static void omap2_mbox_shutdown(struct omap_mbox *mbox)
-{
- pm_runtime_put_sync(mbox->dev->parent);
- pm_runtime_disable(mbox->dev->parent);
-}
-
-/* Mailbox FIFO handle functions */
-static mbox_msg_t omap2_mbox_fifo_read(struct omap_mbox *mbox)
-{
- struct omap_mbox2_fifo *fifo =
- &((struct omap_mbox2_priv *)mbox->priv)->rx_fifo;
- return (mbox_msg_t) mbox_read_reg(fifo->msg);
-}
-
-static void omap2_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
-{
- struct omap_mbox2_fifo *fifo =
- &((struct omap_mbox2_priv *)mbox->priv)->tx_fifo;
- mbox_write_reg(msg, fifo->msg);
-}
-
-static int omap2_mbox_fifo_empty(struct omap_mbox *mbox)
-{
- struct omap_mbox2_fifo *fifo =
- &((struct omap_mbox2_priv *)mbox->priv)->rx_fifo;
- return (mbox_read_reg(fifo->msg_stat) == 0);
-}
-
-static int omap2_mbox_fifo_full(struct omap_mbox *mbox)
-{
- struct omap_mbox2_fifo *fifo =
- &((struct omap_mbox2_priv *)mbox->priv)->tx_fifo;
- return mbox_read_reg(fifo->fifo_stat);
-}
-
-/* Mailbox IRQ handle functions */
-static void omap2_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- struct omap_mbox2_priv *p = mbox->priv;
- u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
-
- l = mbox_read_reg(p->irqenable);
- l |= bit;
- mbox_write_reg(l, p->irqenable);
-}
-
-static void omap2_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- struct omap_mbox2_priv *p = mbox->priv;
- u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
-
- /*
- * Read and update the interrupt configuration register for pre-OMAP4.
- * OMAP4 and later SoCs have a dedicated interrupt disabling register.
- */
- if (!p->intr_type)
- bit = mbox_read_reg(p->irqdisable) & ~bit;
-
- mbox_write_reg(bit, p->irqdisable);
-}
-
-static void omap2_mbox_ack_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- struct omap_mbox2_priv *p = mbox->priv;
- u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
-
- mbox_write_reg(bit, p->irqstatus);
-
- /* Flush posted write for irq status to avoid spurious interrupts */
- mbox_read_reg(p->irqstatus);
-}
-
-static int omap2_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- struct omap_mbox2_priv *p = mbox->priv;
- u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
- u32 enable = mbox_read_reg(p->irqenable);
- u32 status = mbox_read_reg(p->irqstatus);
-
- return (int)(enable & status & bit);
-}
-
-static void omap2_mbox_save_ctx(struct omap_mbox *mbox)
-{
- int i;
- struct omap_mbox2_priv *p = mbox->priv;
- int nr_regs;
-
- if (p->intr_type)
- nr_regs = OMAP4_MBOX_NR_REGS;
- else
- nr_regs = MBOX_NR_REGS;
- for (i = 0; i < nr_regs; i++) {
- p->ctx[i] = mbox_read_reg(i * sizeof(u32));
-
- dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
- i, p->ctx[i]);
- }
-}
-
-static void omap2_mbox_restore_ctx(struct omap_mbox *mbox)
-{
- int i;
- struct omap_mbox2_priv *p = mbox->priv;
- int nr_regs;
-
- if (p->intr_type)
- nr_regs = OMAP4_MBOX_NR_REGS;
- else
- nr_regs = MBOX_NR_REGS;
- for (i = 0; i < nr_regs; i++) {
- mbox_write_reg(p->ctx[i], i * sizeof(u32));
-
- dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
- i, p->ctx[i]);
- }
-}
-
-static struct omap_mbox_ops omap2_mbox_ops = {
- .startup = omap2_mbox_startup,
- .shutdown = omap2_mbox_shutdown,
- .fifo_read = omap2_mbox_fifo_read,
- .fifo_write = omap2_mbox_fifo_write,
- .fifo_empty = omap2_mbox_fifo_empty,
- .fifo_full = omap2_mbox_fifo_full,
- .enable_irq = omap2_mbox_enable_irq,
- .disable_irq = omap2_mbox_disable_irq,
- .ack_irq = omap2_mbox_ack_irq,
- .is_irq = omap2_mbox_is_irq,
- .save_ctx = omap2_mbox_save_ctx,
- .restore_ctx = omap2_mbox_restore_ctx,
-};
-
-static int omap2_mbox_probe(struct platform_device *pdev)
-{
- struct resource *mem;
- int ret;
- struct omap_mbox **list, *mbox, *mboxblk;
- struct omap_mbox2_priv *priv, *privblk;
- struct omap_mbox_pdata *pdata = pdev->dev.platform_data;
- struct omap_mbox_dev_info *info;
- u32 intr_type;
- int i;
-
- if (!pdata || !pdata->info_cnt || !pdata->info) {
- pr_err("%s: platform not supported\n", __func__);
- return -ENODEV;
- }
-
- /* allocate one extra for marking end of list */
- list = devm_kzalloc(&pdev->dev, (pdata->info_cnt + 1) * sizeof(*list),
- GFP_KERNEL);
- if (!list)
- return -ENOMEM;
-
- mboxblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*mbox),
- GFP_KERNEL);
- if (!mboxblk)
- return -ENOMEM;
-
- privblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*priv),
- GFP_KERNEL);
- if (!privblk)
- return -ENOMEM;
-
- info = pdata->info;
- intr_type = pdata->intr_type;
- mbox = mboxblk;
- priv = privblk;
- for (i = 0; i < pdata->info_cnt; i++, info++, priv++) {
- priv->tx_fifo.msg = MAILBOX_MESSAGE(info->tx_id);
- priv->tx_fifo.fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id);
- priv->rx_fifo.msg = MAILBOX_MESSAGE(info->rx_id);
- priv->rx_fifo.msg_stat = MAILBOX_MSGSTATUS(info->rx_id);
- priv->notfull_bit = MAILBOX_IRQ_NOTFULL(info->tx_id);
- priv->newmsg_bit = MAILBOX_IRQ_NEWMSG(info->rx_id);
- priv->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id);
- priv->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id);
- priv->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id);
- priv->intr_type = intr_type;
-
- mbox->priv = priv;
- mbox->name = info->name;
- mbox->ops = &omap2_mbox_ops;
- mbox->irq = platform_get_irq(pdev, info->irq_id);
- if (mbox->irq < 0)
- return mbox->irq;
- list[i] = mbox++;
- }
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mbox_base = devm_ioremap_resource(&pdev->dev, mem);
- if (IS_ERR(mbox_base))
- return PTR_ERR(mbox_base);
-
- ret = omap_mbox_register(&pdev->dev, list);
- if (ret)
- return ret;
-
- platform_set_drvdata(pdev, list);
-
- return 0;
-}
-
-static int omap2_mbox_remove(struct platform_device *pdev)
-{
- omap_mbox_unregister();
-
- return 0;
-}
-
-static struct platform_driver omap2_mbox_driver = {
- .probe = omap2_mbox_probe,
- .remove = omap2_mbox_remove,
- .driver = {
- .name = "omap-mailbox",
- },
-};
-
-static int __init omap2_mbox_init(void)
-{
- return platform_driver_register(&omap2_mbox_driver);
-}
-
-static void __exit omap2_mbox_exit(void)
-{
- platform_driver_unregister(&omap2_mbox_driver);
-}
-
-module_init(omap2_mbox_init);
-module_exit(omap2_mbox_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("omap mailbox: omap2/3/4 architecture specific functions");
-MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>");
-MODULE_AUTHOR("Paul Mundt");
-MODULE_ALIAS("platform:omap2-mailbox");
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index eab7227..66b02ab 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -2,8 +2,10 @@
* OMAP mailbox driver
*
* Copyright (C) 2006-2009 Nokia Corporation. All rights reserved.
+ * Copyright (C) 2013-2014 Texas Instruments Inc.
*
* Contact: Hiroshi DOYU <Hiroshi.DOYU@xxxxxxxxx>
+ * Suman Anna <s-anna@xxxxxx>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -29,45 +31,145 @@
#include <linux/err.h>
#include <linux/notifier.h>
#include <linux/module.h>
-
-#include "omap-mbox.h"
-
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_data/mailbox-omap.h>
+#include <linux/omap-mailbox.h>
+
+#define MAILBOX_REVISION 0x000
+#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m))
+#define MAILBOX_FIFOSTATUS(m) (0x080 + 4 * (m))
+#define MAILBOX_MSGSTATUS(m) (0x0c0 + 4 * (m))
+
+#define OMAP2_MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u))
+#define OMAP2_MAILBOX_IRQENABLE(u) (0x104 + 8 * (u))
+
+#define OMAP4_MAILBOX_IRQSTATUS(u) (0x104 + 0x10 * (u))
+#define OMAP4_MAILBOX_IRQENABLE(u) (0x108 + 0x10 * (u))
+#define OMAP4_MAILBOX_IRQENABLE_CLR(u) (0x10c + 0x10 * (u))
+
+#define MAILBOX_IRQSTATUS(type, u) (type ? OMAP4_MAILBOX_IRQSTATUS(u) : \
+ OMAP2_MAILBOX_IRQSTATUS(u))
+#define MAILBOX_IRQENABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE(u) : \
+ OMAP2_MAILBOX_IRQENABLE(u))
+#define MAILBOX_IRQDISABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE_CLR(u) \
+ : OMAP2_MAILBOX_IRQENABLE(u))
+
+#define MAILBOX_IRQ_NEWMSG(m) (1 << (2 * (m)))
+#define MAILBOX_IRQ_NOTFULL(m) (1 << (2 * (m) + 1))
+
+#define MBOX_REG_SIZE 0x120
+
+#define OMAP4_MBOX_REG_SIZE 0x130
+
+#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32))
+#define OMAP4_MBOX_NR_REGS (OMAP4_MBOX_REG_SIZE / sizeof(u32))
+
+struct omap_mbox_fifo {
+ unsigned long msg;
+ unsigned long fifo_stat;
+ unsigned long msg_stat;
+};
+
+struct omap_mbox_priv {
+ struct omap_mbox_fifo tx_fifo;
+ struct omap_mbox_fifo rx_fifo;
+ unsigned long irqenable;
+ unsigned long irqstatus;
+ u32 newmsg_bit;
+ u32 notfull_bit;
+ u32 ctx[OMAP4_MBOX_NR_REGS];
+ unsigned long irqdisable;
+ u32 intr_type;
+};
+
+struct omap_mbox_queue {
+ spinlock_t lock;
+ struct kfifo fifo;
+ struct work_struct work;
+ struct tasklet_struct tasklet;
+ struct omap_mbox *mbox;
+ bool full;
+};
+
+struct omap_mbox {
+ const char *name;
+ int irq;
+ struct omap_mbox_queue *txq, *rxq;
+ struct device *dev;
+ void *priv;
+ int use_count;
+ struct blocking_notifier_head notifier;
+};
+
+static void __iomem *mbox_base;
static struct omap_mbox **mboxes;
-static int mbox_configured;
static DEFINE_MUTEX(mbox_configured_lock);
static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE;
module_param(mbox_kfifo_size, uint, S_IRUGO);
MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)");
+static inline unsigned int mbox_read_reg(size_t ofs)
+{
+ return __raw_readl(mbox_base + ofs);
+}
+
+static inline void mbox_write_reg(u32 val, size_t ofs)
+{
+ __raw_writel(val, mbox_base + ofs);
+}
+
/* Mailbox FIFO handle functions */
-static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
+static mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
{
- return mbox->ops->fifo_read(mbox);
+ struct omap_mbox_fifo *fifo =
+ &((struct omap_mbox_priv *)mbox->priv)->rx_fifo;
+ return (mbox_msg_t) mbox_read_reg(fifo->msg);
}
-static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
+
+static void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
{
- mbox->ops->fifo_write(mbox, msg);
+ struct omap_mbox_fifo *fifo =
+ &((struct omap_mbox_priv *)mbox->priv)->tx_fifo;
+ mbox_write_reg(msg, fifo->msg);
}
-static inline int mbox_fifo_empty(struct omap_mbox *mbox)
+
+static int mbox_fifo_empty(struct omap_mbox *mbox)
{
- return mbox->ops->fifo_empty(mbox);
+ struct omap_mbox_fifo *fifo =
+ &((struct omap_mbox_priv *)mbox->priv)->rx_fifo;
+ return (mbox_read_reg(fifo->msg_stat) == 0);
}
-static inline int mbox_fifo_full(struct omap_mbox *mbox)
+
+static int mbox_fifo_full(struct omap_mbox *mbox)
{
- return mbox->ops->fifo_full(mbox);
+ struct omap_mbox_fifo *fifo =
+ &((struct omap_mbox_priv *)mbox->priv)->tx_fifo;
+ return mbox_read_reg(fifo->fifo_stat);
}
/* Mailbox IRQ handle functions */
-static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
- if (mbox->ops->ack_irq)
- mbox->ops->ack_irq(mbox, irq);
+ struct omap_mbox_priv *p = mbox->priv;
+ u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
+
+ mbox_write_reg(bit, p->irqstatus);
+
+ /* Flush posted write for irq status to avoid spurious interrupts */
+ mbox_read_reg(p->irqstatus);
}
-static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
+
+static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
- return mbox->ops->is_irq(mbox, irq);
+ struct omap_mbox_priv *p = mbox->priv;
+ u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
+ u32 enable = mbox_read_reg(p->irqenable);
+ u32 status = mbox_read_reg(p->irqstatus);
+
+ return (int)(enable & status & bit);
}
/*
@@ -103,35 +205,66 @@ EXPORT_SYMBOL(omap_mbox_msg_send);
void omap_mbox_save_ctx(struct omap_mbox *mbox)
{
- if (!mbox->ops->save_ctx) {
- dev_err(mbox->dev, "%s:\tno save\n", __func__);
- return;
+ int i;
+ struct omap_mbox_priv *p = mbox->priv;
+ int nr_regs;
+
+ if (p->intr_type)
+ nr_regs = OMAP4_MBOX_NR_REGS;
+ else
+ nr_regs = MBOX_NR_REGS;
+ for (i = 0; i < nr_regs; i++) {
+ p->ctx[i] = mbox_read_reg(i * sizeof(u32));
+
+ dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+ i, p->ctx[i]);
}
-
- mbox->ops->save_ctx(mbox);
}
EXPORT_SYMBOL(omap_mbox_save_ctx);
void omap_mbox_restore_ctx(struct omap_mbox *mbox)
{
- if (!mbox->ops->restore_ctx) {
- dev_err(mbox->dev, "%s:\tno restore\n", __func__);
- return;
+ int i;
+ struct omap_mbox_priv *p = mbox->priv;
+ int nr_regs;
+
+ if (p->intr_type)
+ nr_regs = OMAP4_MBOX_NR_REGS;
+ else
+ nr_regs = MBOX_NR_REGS;
+ for (i = 0; i < nr_regs; i++) {
+ mbox_write_reg(p->ctx[i], i * sizeof(u32));
+
+ dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+ i, p->ctx[i]);
}
-
- mbox->ops->restore_ctx(mbox);
}
EXPORT_SYMBOL(omap_mbox_restore_ctx);
void omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
- mbox->ops->enable_irq(mbox, irq);
+ struct omap_mbox_priv *p = mbox->priv;
+ u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
+
+ l = mbox_read_reg(p->irqenable);
+ l |= bit;
+ mbox_write_reg(l, p->irqenable);
}
EXPORT_SYMBOL(omap_mbox_enable_irq);
void omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
{
- mbox->ops->disable_irq(mbox, irq);
+ struct omap_mbox_priv *p = mbox->priv;
+ u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
+
+ /*
+ * Read and update the interrupt configuration register for pre-OMAP4.
+ * OMAP4 and later SoCs have a dedicated interrupt disabling register.
+ */
+ if (!p->intr_type)
+ bit = mbox_read_reg(p->irqdisable) & ~bit;
+
+ mbox_write_reg(bit, p->irqdisable);
}
EXPORT_SYMBOL(omap_mbox_disable_irq);
@@ -267,14 +400,9 @@ static int omap_mbox_startup(struct omap_mbox *mbox)
struct omap_mbox_queue *mq;
mutex_lock(&mbox_configured_lock);
- if (!mbox_configured++) {
- if (likely(mbox->ops->startup)) {
- ret = mbox->ops->startup(mbox);
- if (unlikely(ret))
- goto fail_startup;
- } else
- goto fail_startup;
- }
+ ret = pm_runtime_get_sync(mbox->dev->parent);
+ if (unlikely(ret < 0))
+ goto fail_startup;
if (!mbox->use_count++) {
mq = mbox_queue_alloc(mbox, NULL, mbox_tx_tasklet);
@@ -309,11 +437,9 @@ fail_request_irq:
fail_alloc_rxq:
mbox_queue_free(mbox->txq);
fail_alloc_txq:
- if (mbox->ops->shutdown)
- mbox->ops->shutdown(mbox);
+ pm_runtime_put_sync(mbox->dev->parent);
mbox->use_count--;
fail_startup:
- mbox_configured--;
mutex_unlock(&mbox_configured_lock);
return ret;
}
@@ -331,10 +457,7 @@ static void omap_mbox_fini(struct omap_mbox *mbox)
mbox_queue_free(mbox->rxq);
}
- if (likely(mbox->ops->shutdown)) {
- if (!--mbox_configured)
- mbox->ops->shutdown(mbox);
- }
+ pm_runtime_put_sync(mbox->dev->parent);
mutex_unlock(&mbox_configured_lock);
}
@@ -379,7 +502,7 @@ EXPORT_SYMBOL(omap_mbox_put);
static struct class omap_mbox_class = { .name = "mbox", };
-int omap_mbox_register(struct device *parent, struct omap_mbox **list)
+static int omap_mbox_register(struct device *parent, struct omap_mbox **list)
{
int ret;
int i;
@@ -406,9 +529,8 @@ err_out:
device_unregister(mboxes[i]->dev);
return ret;
}
-EXPORT_SYMBOL(omap_mbox_register);
-int omap_mbox_unregister(void)
+static int omap_mbox_unregister(void)
{
int i;
@@ -420,7 +542,117 @@ int omap_mbox_unregister(void)
mboxes = NULL;
return 0;
}
-EXPORT_SYMBOL(omap_mbox_unregister);
+
+static int omap_mbox_probe(struct platform_device *pdev)
+{
+ struct resource *mem;
+ int ret;
+ struct omap_mbox **list, *mbox, *mboxblk;
+ struct omap_mbox_priv *priv, *privblk;
+ struct omap_mbox_pdata *pdata = pdev->dev.platform_data;
+ struct omap_mbox_dev_info *info;
+ u32 intr_type;
+ u32 l;
+ int i;
+
+ if (!pdata || !pdata->info_cnt || !pdata->info) {
+ pr_err("%s: platform not supported\n", __func__);
+ return -ENODEV;
+ }
+
+ /* allocate one extra for marking end of list */
+ list = devm_kzalloc(&pdev->dev, (pdata->info_cnt + 1) * sizeof(*list),
+ GFP_KERNEL);
+ if (!list)
+ return -ENOMEM;
+
+ mboxblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*mbox),
+ GFP_KERNEL);
+ if (!mboxblk)
+ return -ENOMEM;
+
+ privblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*priv),
+ GFP_KERNEL);
+ if (!privblk)
+ return -ENOMEM;
+
+ info = pdata->info;
+ intr_type = pdata->intr_type;
+ mbox = mboxblk;
+ priv = privblk;
+ for (i = 0; i < pdata->info_cnt; i++, info++, priv++) {
+ priv->tx_fifo.msg = MAILBOX_MESSAGE(info->tx_id);
+ priv->tx_fifo.fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id);
+ priv->rx_fifo.msg = MAILBOX_MESSAGE(info->rx_id);
+ priv->rx_fifo.msg_stat = MAILBOX_MSGSTATUS(info->rx_id);
+ priv->notfull_bit = MAILBOX_IRQ_NOTFULL(info->tx_id);
+ priv->newmsg_bit = MAILBOX_IRQ_NEWMSG(info->rx_id);
+ priv->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id);
+ priv->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id);
+ priv->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id);
+ priv->intr_type = intr_type;
+
+ mbox->priv = priv;
+ mbox->name = info->name;
+ mbox->irq = platform_get_irq(pdev, info->irq_id);
+ if (mbox->irq < 0)
+ return mbox->irq;
+ list[i] = mbox++;
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mbox_base = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(mbox_base))
+ return PTR_ERR(mbox_base);
+
+ ret = omap_mbox_register(&pdev->dev, list);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, list);
+ pm_runtime_enable(&pdev->dev);
+
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
+ goto unregister;
+ }
+
+ /*
+ * just print the raw revision register, the format is not
+ * uniform across all SoCs
+ */
+ l = mbox_read_reg(MAILBOX_REVISION);
+ dev_info(&pdev->dev, "omap mailbox rev 0x%x\n", l);
+
+ ret = pm_runtime_put_sync(&pdev->dev);
+ if (ret < 0)
+ goto unregister;
+
+ return 0;
+
+unregister:
+ pm_runtime_disable(&pdev->dev);
+ omap_mbox_unregister();
+ return ret;
+}
+
+static int omap_mbox_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+ omap_mbox_unregister();
+
+ return 0;
+}
+
+static struct platform_driver omap_mbox_driver = {
+ .probe = omap_mbox_probe,
+ .remove = omap_mbox_remove,
+ .driver = {
+ .name = "omap-mailbox",
+ .owner = THIS_MODULE,
+ },
+};
static int __init omap_mbox_init(void)
{
@@ -435,12 +667,13 @@ static int __init omap_mbox_init(void)
mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size,
sizeof(mbox_msg_t));
- return 0;
+ return platform_driver_register(&omap_mbox_driver);
}
subsys_initcall(omap_mbox_init);
static void __exit omap_mbox_exit(void)
{
+ platform_driver_unregister(&omap_mbox_driver);
class_unregister(&omap_mbox_class);
}
module_exit(omap_mbox_exit);
diff --git a/drivers/mailbox/omap-mbox.h b/drivers/mailbox/omap-mbox.h
deleted file mode 100644
index fae2151..0000000
--- a/drivers/mailbox/omap-mbox.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * omap-mbox.h: OMAP mailbox internal definitions
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef OMAP_MBOX_H
-#define OMAP_MBOX_H
-
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/kfifo.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/omap-mailbox.h>
-
-struct omap_mbox_ops {
- int (*startup)(struct omap_mbox *mbox);
- void (*shutdown)(struct omap_mbox *mbox);
- /* fifo */
- mbox_msg_t (*fifo_read)(struct omap_mbox *mbox);
- void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg);
- int (*fifo_empty)(struct omap_mbox *mbox);
- int (*fifo_full)(struct omap_mbox *mbox);
- /* irq */
- void (*enable_irq)(struct omap_mbox *mbox,
- omap_mbox_irq_t irq);
- void (*disable_irq)(struct omap_mbox *mbox,
- omap_mbox_irq_t irq);
- void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
- int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
- /* ctx */
- void (*save_ctx)(struct omap_mbox *mbox);
- void (*restore_ctx)(struct omap_mbox *mbox);
-};
-
-struct omap_mbox_queue {
- spinlock_t lock;
- struct kfifo fifo;
- struct work_struct work;
- struct tasklet_struct tasklet;
- struct omap_mbox *mbox;
- bool full;
-};
-
-struct omap_mbox {
- const char *name;
- int irq;
- struct omap_mbox_queue *txq, *rxq;
- struct omap_mbox_ops *ops;
- struct device *dev;
- void *priv;
- int use_count;
- struct blocking_notifier_head notifier;
-};
-
-int omap_mbox_register(struct device *parent, struct omap_mbox **);
-int omap_mbox_unregister(void);
-
-#endif /* OMAP_MBOX_H */
--
2.0.0
--
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