123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111 |
- /*
- * 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/clk.h>
- #include <linux/err.h>
- #include <linux/platform_device.h>
- #include <linux/io.h>
- #include <linux/pm_runtime.h>
- #include <plat/mailbox.h>
- #include "soc.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 MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u))
- #define 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_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;
- };
- static void omap2_mbox_enable_irq(struct omap_mbox *mbox,
- omap_mbox_type_t irq);
- 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);
- }
|