diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mailbox/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/mailbox/Makefile | 4 | ||||
| -rw-r--r-- | drivers/mailbox/mailbox-omap2.c | 333 | ||||
| -rw-r--r-- | drivers/mailbox/omap-mailbox.c | 331 | ||||
| -rw-r--r-- | drivers/mailbox/omap-mbox.h | 62 |
5 files changed, 283 insertions, 455 deletions
diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 1ec8f4e1cf5a..9fd9c6717e0c 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -16,17 +16,9 @@ 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_OMAP2PLUS_MBOX. This enables the common OMAP - mailbox framework code. - 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 diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index d023feb57ba5..6d184dbcaca8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -1,5 +1,3 @@ obj-$(CONFIG_PL320_MBOX) += pl320-ipc.o -obj-$(CONFIG_OMAP_MBOX) += omap-mailbox.o -obj-$(CONFIG_OMAP2PLUS_MBOX) += mailbox_omap2.o -mailbox_omap2-objs := mailbox-omap2.o +obj-$(CONFIG_OMAP2PLUS_MBOX) += omap-mailbox.o diff --git a/drivers/mailbox/mailbox-omap2.c b/drivers/mailbox/mailbox-omap2.c deleted file mode 100644 index 2c463d6c8a8c..000000000000 --- a/drivers/mailbox/mailbox-omap2.c +++ /dev/null @@ -1,333 +0,0 @@ -/* - * 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"); diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c index eab72276ffab..66b02ab00b19 100644 --- a/drivers/mailbox/omap-mailbox.c +++ b/drivers/mailbox/omap-mailbox.c @@ -2,8 +2,10 @@ * OMAP mailbox driver * * Copyright (C) 2006-2009 Nokia Corporation. All rights reserved. + * Copyright (C) 2013-2014 Texas Instruments Inc. * * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> + * Suman Anna <s-anna@ti.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -29,45 +31,145 @@ #include <linux/err.h> #include <linux/notifier.h> #include <linux/module.h> - -#include "omap-mbox.h" - +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/platform_data/mailbox-omap.h> +#include <linux/omap-mailbox.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)) + +struct omap_mbox_fifo { + unsigned long msg; + unsigned long fifo_stat; + unsigned long msg_stat; +}; + +struct omap_mbox_priv { + struct omap_mbox_fifo tx_fifo; + struct omap_mbox_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; +}; + +struct omap_mbox_queue { + spinlock_t lock; + struct kfifo fifo; + struct work_struct work; + struct tasklet_struct tasklet; + struct omap_mbox *mbox; + bool full; +}; + +struct omap_mbox { + const char *name; + int irq; + struct omap_mbox_queue *txq, *rxq; + struct device *dev; + void *priv; + int use_count; + struct blocking_notifier_head notifier; +}; + +static void __iomem *mbox_base; static struct omap_mbox **mboxes; -static int mbox_configured; static DEFINE_MUTEX(mbox_configured_lock); static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE; module_param(mbox_kfifo_size, uint, S_IRUGO); MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)"); +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 FIFO handle functions */ -static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) +static mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) { - return mbox->ops->fifo_read(mbox); + struct omap_mbox_fifo *fifo = + &((struct omap_mbox_priv *)mbox->priv)->rx_fifo; + return (mbox_msg_t) mbox_read_reg(fifo->msg); } -static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) + +static void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) { - mbox->ops->fifo_write(mbox, msg); + struct omap_mbox_fifo *fifo = + &((struct omap_mbox_priv *)mbox->priv)->tx_fifo; + mbox_write_reg(msg, fifo->msg); } -static inline int mbox_fifo_empty(struct omap_mbox *mbox) + +static int mbox_fifo_empty(struct omap_mbox *mbox) { - return mbox->ops->fifo_empty(mbox); + struct omap_mbox_fifo *fifo = + &((struct omap_mbox_priv *)mbox->priv)->rx_fifo; + return (mbox_read_reg(fifo->msg_stat) == 0); } -static inline int mbox_fifo_full(struct omap_mbox *mbox) + +static int mbox_fifo_full(struct omap_mbox *mbox) { - return mbox->ops->fifo_full(mbox); + struct omap_mbox_fifo *fifo = + &((struct omap_mbox_priv *)mbox->priv)->tx_fifo; + return mbox_read_reg(fifo->fifo_stat); } /* Mailbox IRQ handle functions */ -static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) +static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - if (mbox->ops->ack_irq) - mbox->ops->ack_irq(mbox, irq); + struct omap_mbox_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 inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) + +static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - return mbox->ops->is_irq(mbox, irq); + struct omap_mbox_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); } /* @@ -103,35 +205,66 @@ 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; + int i; + struct omap_mbox_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]); } - - 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; + int i; + struct omap_mbox_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]); } - - 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); + struct omap_mbox_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); } 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); + struct omap_mbox_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); } EXPORT_SYMBOL(omap_mbox_disable_irq); @@ -267,14 +400,9 @@ static int omap_mbox_startup(struct omap_mbox *mbox) struct omap_mbox_queue *mq; mutex_lock(&mbox_configured_lock); - if (!mbox_configured++) { - if (likely(mbox->ops->startup)) { - ret = mbox->ops->startup(mbox); - if (unlikely(ret)) - goto fail_startup; - } else - goto fail_startup; - } + ret = pm_runtime_get_sync(mbox->dev->parent); + if (unlikely(ret < 0)) + goto fail_startup; if (!mbox->use_count++) { mq = mbox_queue_alloc(mbox, NULL, mbox_tx_tasklet); @@ -309,11 +437,9 @@ fail_request_irq: fail_alloc_rxq: mbox_queue_free(mbox->txq); fail_alloc_txq: - if (mbox->ops->shutdown) - mbox->ops->shutdown(mbox); + pm_runtime_put_sync(mbox->dev->parent); mbox->use_count--; fail_startup: - mbox_configured--; mutex_unlock(&mbox_configured_lock); return ret; } @@ -331,10 +457,7 @@ static void omap_mbox_fini(struct omap_mbox *mbox) mbox_queue_free(mbox->rxq); } - if (likely(mbox->ops->shutdown)) { - if (!--mbox_configured) - mbox->ops->shutdown(mbox); - } + pm_runtime_put_sync(mbox->dev->parent); mutex_unlock(&mbox_configured_lock); } @@ -379,7 +502,7 @@ EXPORT_SYMBOL(omap_mbox_put); static struct class omap_mbox_class = { .name = "mbox", }; -int omap_mbox_register(struct device *parent, struct omap_mbox **list) +static int omap_mbox_register(struct device *parent, struct omap_mbox **list) { int ret; int i; @@ -406,9 +529,8 @@ err_out: device_unregister(mboxes[i]->dev); return ret; } -EXPORT_SYMBOL(omap_mbox_register); -int omap_mbox_unregister(void) +static int omap_mbox_unregister(void) { int i; @@ -420,7 +542,117 @@ int omap_mbox_unregister(void) mboxes = NULL; return 0; } -EXPORT_SYMBOL(omap_mbox_unregister); + +static int omap_mbox_probe(struct platform_device *pdev) +{ + struct resource *mem; + int ret; + struct omap_mbox **list, *mbox, *mboxblk; + struct omap_mbox_priv *priv, *privblk; + struct omap_mbox_pdata *pdata = pdev->dev.platform_data; + struct omap_mbox_dev_info *info; + u32 intr_type; + u32 l; + 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->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); + pm_runtime_enable(&pdev->dev); + + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(&pdev->dev); + goto unregister; + } + + /* + * just print the raw revision register, the format is not + * uniform across all SoCs + */ + l = mbox_read_reg(MAILBOX_REVISION); + dev_info(&pdev->dev, "omap mailbox rev 0x%x\n", l); + + ret = pm_runtime_put_sync(&pdev->dev); + if (ret < 0) + goto unregister; + + return 0; + +unregister: + pm_runtime_disable(&pdev->dev); + omap_mbox_unregister(); + return ret; +} + +static int omap_mbox_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + omap_mbox_unregister(); + + return 0; +} + +static struct platform_driver omap_mbox_driver = { + .probe = omap_mbox_probe, + .remove = omap_mbox_remove, + .driver = { + .name = "omap-mailbox", + .owner = THIS_MODULE, + }, +}; static int __init omap_mbox_init(void) { @@ -435,12 +667,13 @@ static int __init omap_mbox_init(void) mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size, sizeof(mbox_msg_t)); - return 0; + return platform_driver_register(&omap_mbox_driver); } subsys_initcall(omap_mbox_init); static void __exit omap_mbox_exit(void) { + platform_driver_unregister(&omap_mbox_driver); class_unregister(&omap_mbox_class); } module_exit(omap_mbox_exit); diff --git a/drivers/mailbox/omap-mbox.h b/drivers/mailbox/omap-mbox.h deleted file mode 100644 index fae215195590..000000000000 --- a/drivers/mailbox/omap-mbox.h +++ /dev/null @@ -1,62 +0,0 @@ -/* - * 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 OMAP_MBOX_H -#define OMAP_MBOX_H - -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/kfifo.h> -#include <linux/spinlock.h> -#include <linux/workqueue.h> -#include <linux/omap-mailbox.h> - -struct omap_mbox_ops { - int (*startup)(struct omap_mbox *mbox); - void (*shutdown)(struct omap_mbox *mbox); - /* fifo */ - mbox_msg_t (*fifo_read)(struct omap_mbox *mbox); - void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg); - int (*fifo_empty)(struct omap_mbox *mbox); - int (*fifo_full)(struct omap_mbox *mbox); - /* irq */ - void (*enable_irq)(struct omap_mbox *mbox, - omap_mbox_irq_t irq); - void (*disable_irq)(struct omap_mbox *mbox, - omap_mbox_irq_t irq); - void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); - int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); - /* ctx */ - void (*save_ctx)(struct omap_mbox *mbox); - void (*restore_ctx)(struct omap_mbox *mbox); -}; - -struct omap_mbox_queue { - spinlock_t lock; - struct kfifo fifo; - struct work_struct work; - struct tasklet_struct tasklet; - struct omap_mbox *mbox; - bool full; -}; - -struct omap_mbox { - const char *name; - int irq; - struct omap_mbox_queue *txq, *rxq; - struct omap_mbox_ops *ops; - struct device *dev; - void *priv; - int use_count; - struct blocking_notifier_head notifier; -}; - -int omap_mbox_register(struct device *parent, struct omap_mbox **); -int omap_mbox_unregister(void); - -#endif /* OMAP_MBOX_H */ |