arch/arm/mach-omap2/mailbox.c - kernel/msm-4.9 - Gitiles

 /*
  * Mailbox reservation modules for OMAP2
  *
  * Copyright (C) 2006 Nokia Corporation
  * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
  *        and  Paul Mundt <paul.mundt@nokia.com>
  *
  * 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/kernel.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <mach/mailbox.h>
 #include <mach/irqs.h>

 #define MAILBOX_REVISION		0x00
 #define MAILBOX_SYSCONFIG		0x10
 #define MAILBOX_SYSSTATUS		0x14
 #define MAILBOX_MESSAGE_0		0x40
 #define MAILBOX_MESSAGE_1		0x44
 #define MAILBOX_MESSAGE_2		0x48
 #define MAILBOX_MESSAGE_3		0x4c
 #define MAILBOX_MESSAGE_4		0x50
 #define MAILBOX_MESSAGE_5		0x54
 #define MAILBOX_FIFOSTATUS_0		0x80
 #define MAILBOX_FIFOSTATUS_1		0x84
 #define MAILBOX_FIFOSTATUS_2		0x88
 #define MAILBOX_FIFOSTATUS_3		0x8c
 #define MAILBOX_FIFOSTATUS_4		0x90
 #define MAILBOX_FIFOSTATUS_5		0x94
 #define MAILBOX_MSGSTATUS_0		0xc0
 #define MAILBOX_MSGSTATUS_1		0xc4
 #define MAILBOX_MSGSTATUS_2		0xc8
 #define MAILBOX_MSGSTATUS_3		0xcc
 #define MAILBOX_MSGSTATUS_4		0xd0
 #define MAILBOX_MSGSTATUS_5		0xd4
 #define MAILBOX_IRQSTATUS_0		0x100
 #define MAILBOX_IRQENABLE_0		0x104
 #define MAILBOX_IRQSTATUS_1		0x108
 #define MAILBOX_IRQENABLE_1		0x10c
 #define MAILBOX_IRQSTATUS_2		0x110
 #define MAILBOX_IRQENABLE_2		0x114
 #define MAILBOX_IRQSTATUS_3		0x118
 #define MAILBOX_IRQENABLE_3		0x11c

 static unsigned long mbox_base;

 #define MAILBOX_IRQ_NOTFULL(n)		(1 << (2 * (n) + 1))
 #define MAILBOX_IRQ_NEWMSG(n)		(1 << (2 * (n)))

 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;
 };

 static struct clk *mbox_ick_handle;

 static void omap2_mbox_enable_irq(struct omap_mbox *mbox,
 				  omap_mbox_type_t irq);

 static inline unsigned int mbox_read_reg(unsigned int reg)
 {
 	return __raw_readl(mbox_base + reg);
 }

 static inline void mbox_write_reg(unsigned int val, unsigned int reg)
 {
 	__raw_writel(val, mbox_base + reg);
 }

 /* Mailbox H/W preparations */
 static int omap2_mbox_startup(struct omap_mbox *mbox)
 {
 	unsigned int l;

 	mbox_ick_handle = clk_get(NULL, "mailboxes_ick");
 	if (IS_ERR(mbox_ick_handle)) {
 		printk("Could not get mailboxes_ick\n");
 		return -ENODEV;
 	}
 	clk_enable(mbox_ick_handle);

 	/* set smart-idle & autoidle */
 	l = mbox_read_reg(MAILBOX_SYSCONFIG);
 	l |= 0x00000011;
 	mbox_write_reg(l, MAILBOX_SYSCONFIG);

 	omap2_mbox_enable_irq(mbox, IRQ_RX);

 	return 0;
 }

 static void omap2_mbox_shutdown(struct omap_mbox *mbox)
 {
 	clk_disable(mbox_ick_handle);
 	clk_put(mbox_ick_handle);
 }

 /* 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_type_t irq)
 {
 	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)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_type_t irq)
 {
 	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)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_ack_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
 	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
 	u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;

 	mbox_write_reg(bit, p->irqstatus);
 }

 static int omap2_mbox_is_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
 	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)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 (enable & status & bit);
 }

 static struct omap_mbox_ops omap2_mbox_ops = {
 	.type		= OMAP_MBOX_TYPE2,
 	.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,
 };

 /*
  * MAILBOX 0: ARM -> DSP,
  * MAILBOX 1: ARM <- DSP.
  * MAILBOX 2: ARM -> IVA,
  * MAILBOX 3: ARM <- IVA.
  */

 /* FIXME: the following structs should be filled automatically by the user id */

 /* DSP */
 static struct omap_mbox2_priv omap2_mbox_dsp_priv = {
 	.tx_fifo = {
 		.msg		= MAILBOX_MESSAGE_0,
 		.fifo_stat	= MAILBOX_FIFOSTATUS_0,
 	},
 	.rx_fifo = {
 		.msg		= MAILBOX_MESSAGE_1,
 		.msg_stat	= MAILBOX_MSGSTATUS_1,
 	},
 	.irqenable	= MAILBOX_IRQENABLE_0,
 	.irqstatus	= MAILBOX_IRQSTATUS_0,
 	.notfull_bit	= MAILBOX_IRQ_NOTFULL(0),
 	.newmsg_bit	= MAILBOX_IRQ_NEWMSG(1),
 };

 struct omap_mbox mbox_dsp_info = {
 	.name	= "dsp",
 	.ops	= &omap2_mbox_ops,
 	.priv	= &omap2_mbox_dsp_priv,
 };
 EXPORT_SYMBOL(mbox_dsp_info);

 /* IVA */
 static struct omap_mbox2_priv omap2_mbox_iva_priv = {
 	.tx_fifo = {
 		.msg		= MAILBOX_MESSAGE_2,
 		.fifo_stat	= MAILBOX_FIFOSTATUS_2,
 	},
 	.rx_fifo = {
 		.msg		= MAILBOX_MESSAGE_3,
 		.msg_stat	= MAILBOX_MSGSTATUS_3,
 	},
 	.irqenable	= MAILBOX_IRQENABLE_3,
 	.irqstatus	= MAILBOX_IRQSTATUS_3,
 	.notfull_bit	= MAILBOX_IRQ_NOTFULL(2),
 	.newmsg_bit	= MAILBOX_IRQ_NEWMSG(3),
 };

 static struct omap_mbox mbox_iva_info = {
 	.name	= "iva",
 	.ops	= &omap2_mbox_ops,
 	.priv	= &omap2_mbox_iva_priv,
 };

 static int __init omap2_mbox_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	int ret = 0;

 	if (pdev->num_resources != 3) {
 		dev_err(&pdev->dev, "invalid number of resources: %d\n",
 			pdev->num_resources);
 		return -ENODEV;
 	}

 	/* MBOX base */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (unlikely(!res)) {
 		dev_err(&pdev->dev, "invalid mem resource\n");
 		return -ENODEV;
 	}
 	mbox_base = res->start;

 	/* DSP IRQ */
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (unlikely(!res)) {
 		dev_err(&pdev->dev, "invalid irq resource\n");
 		return -ENODEV;
 	}
 	mbox_dsp_info.irq = res->start;

 	ret = omap_mbox_register(&mbox_dsp_info);

 	/* IVA IRQ */
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
 	if (unlikely(!res)) {
 		dev_err(&pdev->dev, "invalid irq resource\n");
 		return -ENODEV;
 	}
 	mbox_iva_info.irq = res->start;

 	ret = omap_mbox_register(&mbox_iva_info);

 	return ret;
 }

 static int omap2_mbox_remove(struct platform_device *pdev)
 {
 	omap_mbox_unregister(&mbox_dsp_info);
 	return 0;
 }

 static struct platform_driver omap2_mbox_driver = {
 	.probe = omap2_mbox_probe,
 	.remove = omap2_mbox_remove,
 	.driver = {
 		.name = "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");
	/*
	* Mailbox reservation modules for OMAP2
	*
	* Copyright (C) 2006 Nokia Corporation
	* Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
	* and Paul Mundt <paul.mundt@nokia.com>
	*
	* 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/kernel.h>
	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/io.h>
	#include <mach/mailbox.h>
	#include <mach/irqs.h>

	#define MAILBOX_REVISION 0x00
	#define MAILBOX_SYSCONFIG 0x10
	#define MAILBOX_SYSSTATUS 0x14
	#define MAILBOX_MESSAGE_0 0x40
	#define MAILBOX_MESSAGE_1 0x44
	#define MAILBOX_MESSAGE_2 0x48
	#define MAILBOX_MESSAGE_3 0x4c
	#define MAILBOX_MESSAGE_4 0x50
	#define MAILBOX_MESSAGE_5 0x54
	#define MAILBOX_FIFOSTATUS_0 0x80
	#define MAILBOX_FIFOSTATUS_1 0x84
	#define MAILBOX_FIFOSTATUS_2 0x88
	#define MAILBOX_FIFOSTATUS_3 0x8c
	#define MAILBOX_FIFOSTATUS_4 0x90
	#define MAILBOX_FIFOSTATUS_5 0x94
	#define MAILBOX_MSGSTATUS_0 0xc0
	#define MAILBOX_MSGSTATUS_1 0xc4
	#define MAILBOX_MSGSTATUS_2 0xc8
	#define MAILBOX_MSGSTATUS_3 0xcc
	#define MAILBOX_MSGSTATUS_4 0xd0
	#define MAILBOX_MSGSTATUS_5 0xd4
	#define MAILBOX_IRQSTATUS_0 0x100
	#define MAILBOX_IRQENABLE_0 0x104
	#define MAILBOX_IRQSTATUS_1 0x108
	#define MAILBOX_IRQENABLE_1 0x10c
	#define MAILBOX_IRQSTATUS_2 0x110
	#define MAILBOX_IRQENABLE_2 0x114
	#define MAILBOX_IRQSTATUS_3 0x118
	#define MAILBOX_IRQENABLE_3 0x11c

	static unsigned long mbox_base;

	#define MAILBOX_IRQ_NOTFULL(n) (1 << (2 * (n) + 1))
	#define MAILBOX_IRQ_NEWMSG(n) (1 << (2 * (n)))

	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;
	};

	static struct clk *mbox_ick_handle;

	static void omap2_mbox_enable_irq(struct omap_mbox *mbox,
	omap_mbox_type_t irq);

	static inline unsigned int mbox_read_reg(unsigned int reg)
	{
	return __raw_readl(mbox_base + reg);
	}

	static inline void mbox_write_reg(unsigned int val, unsigned int reg)
	{
	__raw_writel(val, mbox_base + reg);
	}

	/* Mailbox H/W preparations */
	static int omap2_mbox_startup(struct omap_mbox *mbox)
	{
	unsigned int l;

	mbox_ick_handle = clk_get(NULL, "mailboxes_ick");
	if (IS_ERR(mbox_ick_handle)) {
	printk("Could not get mailboxes_ick\n");
	return -ENODEV;
	}
	clk_enable(mbox_ick_handle);

	/* set smart-idle & autoidle */
	l = mbox_read_reg(MAILBOX_SYSCONFIG);
	l \|= 0x00000011;
	mbox_write_reg(l, MAILBOX_SYSCONFIG);

	omap2_mbox_enable_irq(mbox, IRQ_RX);

	return 0;
	}

	static void omap2_mbox_shutdown(struct omap_mbox *mbox)
	{
	clk_disable(mbox_ick_handle);
	clk_put(mbox_ick_handle);
	}

	/* 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_type_t irq)
	{
	struct omap_mbox2_priv p = (struct omap_mbox2_priv )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_type_t irq)
	{
	struct omap_mbox2_priv p = (struct omap_mbox2_priv )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_ack_irq(struct omap_mbox *mbox,
	omap_mbox_type_t irq)
	{
	struct omap_mbox2_priv p = (struct omap_mbox2_priv )mbox->priv;
	u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;

	mbox_write_reg(bit, p->irqstatus);
	}

	static int omap2_mbox_is_irq(struct omap_mbox *mbox,
	omap_mbox_type_t irq)
	{
	struct omap_mbox2_priv p = (struct omap_mbox2_priv )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 (enable & status & bit);
	}

	static struct omap_mbox_ops omap2_mbox_ops = {
	.type = OMAP_MBOX_TYPE2,
	.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,
	};

	/*
	* MAILBOX 0: ARM -> DSP,
	* MAILBOX 1: ARM <- DSP.
	* MAILBOX 2: ARM -> IVA,
	* MAILBOX 3: ARM <- IVA.
	*/

	/* FIXME: the following structs should be filled automatically by the user id */

	/* DSP */
	static struct omap_mbox2_priv omap2_mbox_dsp_priv = {
	.tx_fifo = {
	.msg = MAILBOX_MESSAGE_0,
	.fifo_stat = MAILBOX_FIFOSTATUS_0,
	},
	.rx_fifo = {
	.msg = MAILBOX_MESSAGE_1,
	.msg_stat = MAILBOX_MSGSTATUS_1,
	},
	.irqenable = MAILBOX_IRQENABLE_0,
	.irqstatus = MAILBOX_IRQSTATUS_0,
	.notfull_bit = MAILBOX_IRQ_NOTFULL(0),
	.newmsg_bit = MAILBOX_IRQ_NEWMSG(1),
	};

	struct omap_mbox mbox_dsp_info = {
	.name = "dsp",
	.ops = &omap2_mbox_ops,
	.priv = &omap2_mbox_dsp_priv,
	};
	EXPORT_SYMBOL(mbox_dsp_info);

	/* IVA */
	static struct omap_mbox2_priv omap2_mbox_iva_priv = {
	.tx_fifo = {
	.msg = MAILBOX_MESSAGE_2,
	.fifo_stat = MAILBOX_FIFOSTATUS_2,
	},
	.rx_fifo = {
	.msg = MAILBOX_MESSAGE_3,
	.msg_stat = MAILBOX_MSGSTATUS_3,
	},
	.irqenable = MAILBOX_IRQENABLE_3,
	.irqstatus = MAILBOX_IRQSTATUS_3,
	.notfull_bit = MAILBOX_IRQ_NOTFULL(2),
	.newmsg_bit = MAILBOX_IRQ_NEWMSG(3),
	};

	static struct omap_mbox mbox_iva_info = {
	.name = "iva",
	.ops = &omap2_mbox_ops,
	.priv = &omap2_mbox_iva_priv,
	};

	static int __init omap2_mbox_probe(struct platform_device *pdev)
	{
	struct resource *res;
	int ret = 0;

	if (pdev->num_resources != 3) {
	dev_err(&pdev->dev, "invalid number of resources: %d\n",
	pdev->num_resources);
	return -ENODEV;
	}

	/* MBOX base */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (unlikely(!res)) {
	dev_err(&pdev->dev, "invalid mem resource\n");
	return -ENODEV;
	}
	mbox_base = res->start;

	/* DSP IRQ */
	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (unlikely(!res)) {
	dev_err(&pdev->dev, "invalid irq resource\n");
	return -ENODEV;
	}
	mbox_dsp_info.irq = res->start;

	ret = omap_mbox_register(&mbox_dsp_info);

	/* IVA IRQ */
	res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
	if (unlikely(!res)) {
	dev_err(&pdev->dev, "invalid irq resource\n");
	return -ENODEV;
	}
	mbox_iva_info.irq = res->start;

	ret = omap_mbox_register(&mbox_iva_info);

	return ret;
	}

	static int omap2_mbox_remove(struct platform_device *pdev)
	{
	omap_mbox_unregister(&mbox_dsp_info);
	return 0;
	}

	static struct platform_driver omap2_mbox_driver = {
	.probe = omap2_mbox_probe,
	.remove = omap2_mbox_remove,
	.driver = {
	.name = "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");