+++ /dev/null
-/*
- * Mailbox reservation modules for OMAP2/3
- *
- * Copyright (C) 2006-2009 Nokia Corporation
- * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
- * 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@nokia.com>");
-MODULE_AUTHOR("Paul Mundt");
-MODULE_ALIAS("platform:omap2-mailbox");
git.openpandora.org / pandora-kernel.git / commitdiff