Commit c869c75c authored by Suman Anna's avatar Suman Anna

mailbox/omap: move the OMAP mailbox framework to drivers

The mailbox hardware (in OMAP) uses a queued mailbox interrupt
mechanism that provides a communication channel between processors
through a set of registers and their associated interrupt signals
by sending and receiving messages.

The OMAP mailbox framework/driver code is moved to be under
drivers/mailbox, in preparation for adapting to a common mailbox
driver framework. This allows the build for OMAP mailbox to be
enabled (it was disabled during the multi-platform support).

As part of the migration from plat and mach code:
- Kconfig symbols have been renamed to build OMAP1 or OMAP2+ drivers.
- mailbox.h under plat-omap/plat/include has been split into a public
  and private header files. The public header has only the API related
  functions and types.
- The module name mailbox.ko from plat-omap is changed to
  omap-mailbox.ko
- The module name mailbox_mach.ko from mach-omapX is changed as
    mailbox_omap1.ko for OMAP1
    mailbox_omap2.ko for OMAP2+

Cc: Tony Lindgren <tony@atomide.com>
[gregkh@linuxfoundation.org: ack for staging part]
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarOmar Ramirez Luna <omar.ramirez@copitl.com>
Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
parent fe32c1f6
......@@ -26,7 +26,8 @@ CONFIG_ARCH_OMAP=y
CONFIG_ARCH_OMAP1=y
CONFIG_OMAP_RESET_CLOCKS=y
# CONFIG_OMAP_MUX is not set
CONFIG_OMAP_MBOX_FWK=y
CONFIG_MAILBOX=y
CONFIG_OMAP1_MBOX=y
CONFIG_OMAP_32K_TIMER=y
CONFIG_OMAP_DM_TIMER=y
CONFIG_ARCH_OMAP730=y
......
......@@ -19,10 +19,6 @@ obj-$(CONFIG_ARCH_OMAP16XX) += ocpi.o
# Power Management
obj-$(CONFIG_PM) += pm.o sleep.o
# DSP
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o
mailbox_mach-objs := mailbox.o
i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
obj-y += $(i2c-omap-m) $(i2c-omap-y)
......
......@@ -203,9 +203,6 @@ obj-$(CONFIG_ARCH_OMAP4) += omap_hwmod_44xx_data.o
obj-$(CONFIG_OMAP3_EMU) += emu.o
obj-$(CONFIG_HW_PERF_EVENTS) += pmu.o
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o
mailbox_mach-objs := mailbox.o
iommu-$(CONFIG_OMAP_IOMMU) := omap-iommu.o
obj-y += $(iommu-m) $(iommu-y)
......
......@@ -328,7 +328,7 @@ int __init omap4_keyboard_init(struct omap4_keypad_platform_data
return 0;
}
#if defined(CONFIG_OMAP_MBOX_FWK) || defined(CONFIG_OMAP_MBOX_FWK_MODULE)
#if defined(CONFIG_OMAP2PLUS_MBOX) || defined(CONFIG_OMAP2PLUS_MBOX_MODULE)
static inline void __init omap_init_mbox(void)
{
struct omap_hwmod *oh;
......@@ -352,7 +352,7 @@ static inline void __init omap_init_mbox(void)
}
#else
static inline void omap_init_mbox(void) { }
#endif /* CONFIG_OMAP_MBOX_FWK */
#endif /* CONFIG_OMAP2PLUS_MBOX */
static inline void omap_init_sti(void) {}
......
......@@ -86,22 +86,6 @@ config OMAP_MUX_WARNINGS
to change the pin multiplexing setup. When there are no warnings
printed, it's safe to deselect OMAP_MUX for your product.
config OMAP_MBOX_FWK
tristate "Mailbox framework support"
depends on ARCH_OMAP && !ARCH_MULTIPLATFORM
help
Say Y here if you want to use OMAP Mailbox framework support for
DSP, IVA1.0 and IVA2 in OMAP1/2/3.
config OMAP_MBOX_KFIFO_SIZE
int "Mailbox kfifo default buffer size (bytes)"
depends on OMAP_MBOX_FWK
default 256
help
Specify the default size of mailbox's kfifo buffers (bytes).
This can also be changed at runtime (via the mbox_kfifo_size
module parameter).
config OMAP_IOMMU_IVA2
bool
......
......@@ -17,6 +17,3 @@ obj-$(CONFIG_OMAP_DEBUG_LEDS) += debug-leds.o
i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
obj-y += $(i2c-omap-m) $(i2c-omap-y)
# OMAP mailbox framework
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox.o
......@@ -16,4 +16,38 @@ 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_OMAP1_MBOX or CONFIG_OMAP2PLUS_MBOX. This
enables the common OMAP mailbox framework code.
config OMAP1_MBOX
tristate "OMAP1 Mailbox framework support"
depends on ARCH_OMAP1
select OMAP_MBOX
help
Mailbox implementation for OMAP chips with hardware for
interprocessor communication involving DSP in OMAP1. Say Y here
if you want to use OMAP1 Mailbox framework support.
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
OMAP2/3; or IPU, IVA HD and DSP in OMAP4/5. Say Y here if you
want to use OMAP2+ Mailbox framework support.
config OMAP_MBOX_KFIFO_SIZE
int "Mailbox kfifo default buffer size (bytes)"
depends on OMAP2PLUS_MBOX || OMAP1_MBOX
default 256
help
Specify the default size of mailbox's kfifo buffers (bytes).
This can also be changed at runtime (via the mbox_kfifo_size
module parameter).
endif
obj-$(CONFIG_PL320_MBOX) += pl320-ipc.o
obj-$(CONFIG_OMAP_MBOX) += omap-mailbox.o
obj-$(CONFIG_OMAP1_MBOX) += mailbox_omap1.o
mailbox_omap1-objs := mailbox-omap1.o
obj-$(CONFIG_OMAP2PLUS_MBOX) += mailbox_omap2.o
mailbox_omap2-objs := mailbox-omap2.o
......@@ -13,7 +13,8 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <plat/mailbox.h>
#include "omap-mbox.h"
#define MAILBOX_ARM2DSP1 0x00
#define MAILBOX_ARM2DSP1b 0x04
......
......@@ -19,7 +19,7 @@
#include <linux/pm_runtime.h>
#include <linux/platform_data/mailbox-omap.h>
#include <plat/mailbox.h>
#include "omap-mbox.h"
#define MAILBOX_REVISION 0x000
#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m))
......@@ -331,9 +331,9 @@ static int omap2_mbox_remove(struct platform_device *pdev)
}
static struct platform_driver omap2_mbox_driver = {
.probe = omap2_mbox_probe,
.remove = omap2_mbox_remove,
.driver = {
.probe = omap2_mbox_probe,
.remove = omap2_mbox_remove,
.driver = {
.name = "omap-mailbox",
},
};
......
......@@ -31,7 +31,7 @@
#include <linux/notifier.h>
#include <linux/module.h>
#include <plat/mailbox.h>
#include "omap-mbox.h"
static struct omap_mbox **mboxes;
......@@ -116,6 +116,40 @@ out:
}
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;
}
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;
}
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);
}
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);
}
EXPORT_SYMBOL(omap_mbox_disable_irq);
static void mbox_tx_tasklet(unsigned long tx_data)
{
struct omap_mbox *mbox = (struct omap_mbox *)tx_data;
......
/* mailbox.h */
/*
* 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 MAILBOX_H
#define MAILBOX_H
#ifndef OMAP_MBOX_H
#define OMAP_MBOX_H
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>
typedef u32 mbox_msg_t;
struct omap_mbox;
typedef int __bitwise omap_mbox_irq_t;
#define IRQ_TX ((__force omap_mbox_irq_t) 1)
#define IRQ_RX ((__force omap_mbox_irq_t) 2)
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/omap-mailbox.h>
typedef int __bitwise omap_mbox_type_t;
#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
......@@ -58,48 +58,10 @@ struct omap_mbox {
struct device *dev;
void *priv;
int use_count;
struct blocking_notifier_head notifier;
struct blocking_notifier_head notifier;
};
int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg);
void omap_mbox_init_seq(struct omap_mbox *);
struct omap_mbox *omap_mbox_get(const char *, struct notifier_block *nb);
void omap_mbox_put(struct omap_mbox *mbox, struct notifier_block *nb);
int omap_mbox_register(struct device *parent, struct omap_mbox **);
int omap_mbox_unregister(void);
static inline void omap_mbox_save_ctx(struct omap_mbox *mbox)
{
if (!mbox->ops->save_ctx) {
dev_err(mbox->dev, "%s:\tno save\n", __func__);
return;
}
mbox->ops->save_ctx(mbox);
}
static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox)
{
if (!mbox->ops->restore_ctx) {
dev_err(mbox->dev, "%s:\tno restore\n", __func__);
return;
}
mbox->ops->restore_ctx(mbox);
}
static inline void omap_mbox_enable_irq(struct omap_mbox *mbox,
omap_mbox_irq_t irq)
{
mbox->ops->enable_irq(mbox, irq);
}
static inline void omap_mbox_disable_irq(struct omap_mbox *mbox,
omap_mbox_irq_t irq)
{
mbox->ops->disable_irq(mbox, irq);
}
#endif /* MAILBOX_H */
#endif /* OMAP_MBOX_H */
......@@ -14,8 +14,9 @@ config OMAP_REMOTEPROC
depends on HAS_DMA
depends on ARCH_OMAP4 || SOC_OMAP5
depends on OMAP_IOMMU
depends on OMAP_MBOX_FWK
select REMOTEPROC
select MAILBOX
select OMAP2PLUS_MBOX
select RPMSG
help
Say y here to support OMAP's remote processors (dual M3
......
......@@ -27,8 +27,8 @@
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/remoteproc.h>
#include <linux/omap-mailbox.h>
#include <plat/mailbox.h>
#include <linux/platform_data/remoteproc-omap.h>
#include "omap_remoteproc.h"
......
......@@ -5,7 +5,8 @@
menuconfig TIDSPBRIDGE
tristate "DSP Bridge driver"
depends on ARCH_OMAP3 && !ARCH_MULTIPLATFORM
select OMAP_MBOX_FWK
select MAILBOX
select OMAP2PLUS_MBOX
help
DSP/BIOS Bridge is designed for platforms that contain a GPP and
one or more attached DSPs. The GPP is considered the master or
......
......@@ -41,7 +41,7 @@
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <plat/mailbox.h>
#include <linux/omap-mailbox.h>
#include <linux/pagemap.h>
#include <asm/cacheflush.h>
#include <linux/dma-mapping.h>
......
/*
* omap-mailbox: interprocessor communication module for OMAP
*
* 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_MAILBOX_H
#define OMAP_MAILBOX_H
typedef u32 mbox_msg_t;
struct omap_mbox;
typedef int __bitwise omap_mbox_irq_t;
#define IRQ_TX ((__force omap_mbox_irq_t) 1)
#define IRQ_RX ((__force omap_mbox_irq_t) 2)
int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg);
struct omap_mbox *omap_mbox_get(const char *, struct notifier_block *nb);
void omap_mbox_put(struct omap_mbox *mbox, struct notifier_block *nb);
void omap_mbox_save_ctx(struct omap_mbox *mbox);
void omap_mbox_restore_ctx(struct omap_mbox *mbox);
void omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq);
void omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq);
#endif /* OMAP_MAILBOX_H */
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