+++ /dev/null
-/*
- * Mailbox reservation modules for OMAP1
- *
- * Copyright (C) 2006-2009 Nokia Corporation
- * Written by: Hiroshi DOYU <Hiroshi.DOYU@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/module.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-
-#include "omap-mbox.h"
-
-#define MAILBOX_ARM2DSP1 0x00
-#define MAILBOX_ARM2DSP1b 0x04
-#define MAILBOX_DSP2ARM1 0x08
-#define MAILBOX_DSP2ARM1b 0x0c
-#define MAILBOX_DSP2ARM2 0x10
-#define MAILBOX_DSP2ARM2b 0x14
-#define MAILBOX_ARM2DSP1_Flag 0x18
-#define MAILBOX_DSP2ARM1_Flag 0x1c
-#define MAILBOX_DSP2ARM2_Flag 0x20
-
-static void __iomem *mbox_base;
-
-struct omap_mbox1_fifo {
- unsigned long cmd;
- unsigned long data;
- unsigned long flag;
-};
-
-struct omap_mbox1_priv {
- struct omap_mbox1_fifo tx_fifo;
- struct omap_mbox1_fifo rx_fifo;
-};
-
-static inline int mbox_read_reg(size_t ofs)
-{
- return __raw_readw(mbox_base + ofs);
-}
-
-static inline void mbox_write_reg(u32 val, size_t ofs)
-{
- __raw_writew(val, mbox_base + ofs);
-}
-
-/* msg */
-static mbox_msg_t omap1_mbox_fifo_read(struct omap_mbox *mbox)
-{
- struct omap_mbox1_fifo *fifo =
- &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo;
- mbox_msg_t msg;
-
- msg = mbox_read_reg(fifo->data);
- msg |= ((mbox_msg_t) mbox_read_reg(fifo->cmd)) << 16;
-
- return msg;
-}
-
-static void
-omap1_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
-{
- struct omap_mbox1_fifo *fifo =
- &((struct omap_mbox1_priv *)mbox->priv)->tx_fifo;
-
- mbox_write_reg(msg & 0xffff, fifo->data);
- mbox_write_reg(msg >> 16, fifo->cmd);
-}
-
-static int omap1_mbox_fifo_empty(struct omap_mbox *mbox)
-{
- return 0;
-}
-
-static int omap1_mbox_fifo_full(struct omap_mbox *mbox)
-{
- struct omap_mbox1_fifo *fifo =
- &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo;
-
- return mbox_read_reg(fifo->flag);
-}
-
-/* irq */
-static void
-omap1_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- if (irq == IRQ_RX)
- enable_irq(mbox->irq);
-}
-
-static void
-omap1_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- if (irq == IRQ_RX)
- disable_irq(mbox->irq);
-}
-
-static int
-omap1_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
- if (irq == IRQ_TX)
- return 0;
- return 1;
-}
-
-static struct omap_mbox_ops omap1_mbox_ops = {
- .type = OMAP_MBOX_TYPE1,
- .fifo_read = omap1_mbox_fifo_read,
- .fifo_write = omap1_mbox_fifo_write,
- .fifo_empty = omap1_mbox_fifo_empty,
- .fifo_full = omap1_mbox_fifo_full,
- .enable_irq = omap1_mbox_enable_irq,
- .disable_irq = omap1_mbox_disable_irq,
- .is_irq = omap1_mbox_is_irq,
-};
-
-/* FIXME: the following struct should be created automatically by the user id */
-
-/* DSP */
-static struct omap_mbox1_priv omap1_mbox_dsp_priv = {
- .tx_fifo = {
- .cmd = MAILBOX_ARM2DSP1b,
- .data = MAILBOX_ARM2DSP1,
- .flag = MAILBOX_ARM2DSP1_Flag,
- },
- .rx_fifo = {
- .cmd = MAILBOX_DSP2ARM1b,
- .data = MAILBOX_DSP2ARM1,
- .flag = MAILBOX_DSP2ARM1_Flag,
- },
-};
-
-static struct omap_mbox mbox_dsp_info = {
- .name = "dsp",
- .ops = &omap1_mbox_ops,
- .priv = &omap1_mbox_dsp_priv,
-};
-
-static struct omap_mbox *omap1_mboxes[] = { &mbox_dsp_info, NULL };
-
-static int omap1_mbox_probe(struct platform_device *pdev)
-{
- struct resource *mem;
- int ret;
- struct omap_mbox **list;
-
- list = omap1_mboxes;
- list[0]->irq = platform_get_irq_byname(pdev, "dsp");
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem)
- return -ENOENT;
-
- mbox_base = ioremap(mem->start, resource_size(mem));
- if (!mbox_base)
- return -ENOMEM;
-
- ret = omap_mbox_register(&pdev->dev, list);
- if (ret) {
- iounmap(mbox_base);
- return ret;
- }
-
- return 0;
-}
-
-static int omap1_mbox_remove(struct platform_device *pdev)
-{
- omap_mbox_unregister();
- iounmap(mbox_base);
- return 0;
-}
-
-static struct platform_driver omap1_mbox_driver = {
- .probe = omap1_mbox_probe,
- .remove = omap1_mbox_remove,
- .driver = {
- .name = "omap-mailbox",
- },
-};
-
-static int __init omap1_mbox_init(void)
-{
- return platform_driver_register(&omap1_mbox_driver);
-}
-
-static void __exit omap1_mbox_exit(void)
-{
- platform_driver_unregister(&omap1_mbox_driver);
-}
-
-module_init(omap1_mbox_init);
-module_exit(omap1_mbox_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("omap mailbox: omap1 architecture specific functions");
-MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>");
-MODULE_ALIAS("platform:omap1-mailbox");
projects / firefly-linux-kernel-4.4.55.git / commitdiff