1 files changed, 113 insertions, 82 deletions

diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 32b7af3c610b..fd5b8a5925cc 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -1,9 +1,9 @@
 /*
- * Mailbox reservation modules for OMAP2
+ * Mailbox reservation modules for OMAP2/3
  *
- * Copyright (C) 2006 Nokia Corporation
+ * Copyright (C) 2006-2009 Nokia Corporation
  * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
- *        and  Paul Mundt <paul.mundt@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
@@ -18,40 +18,22 @@
 #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)))
+#define MAILBOX_REVISION                0x000
+#define MAILBOX_SYSCONFIG               0x010
+#define MAILBOX_SYSSTATUS               0x014
+#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 MAILBOX_IRQ_NEWMSG(u)           (1 << (2 * (u)))
+#define MAILBOX_IRQ_NOTFULL(u)          (1 << (2 * (u) + 1))
+
+#define MBOX_REG_SIZE                   0x120
+#define MBOX_NR_REGS                    (MBOX_REG_SIZE / sizeof(u32))
+
+static void __iomem *mbox_base;
 
 struct omap_mbox2_fifo {
         unsigned long msg;
@@ -66,6 +48,7 @@ struct omap_mbox2_priv {
         unsigned long irqstatus;
         u32 newmsg_bit;
         u32 notfull_bit;
+        u32 ctx[MBOX_NR_REGS];
 };
 
 static struct clk *mbox_ick_handle;
@@ -73,14 +56,14 @@ 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)
+static inline unsigned int mbox_read_reg(size_t ofs)
 {
-        return __raw_readl(mbox_base + reg);
+        return __raw_readl(mbox_base + ofs);
 }
 
-static inline void mbox_write_reg(unsigned int val, unsigned int reg)
+static inline void mbox_write_reg(u32 val, size_t ofs)
 {
-        __raw_writel(val, mbox_base + reg);
+        __raw_writel(val, mbox_base + ofs);
 }
 
 /* Mailbox H/W preparations */
@@ -95,6 +78,9 @@ static int omap2_mbox_startup(struct omap_mbox *mbox)
         }
         clk_enable(mbox_ick_handle);
 
+        l = mbox_read_reg(MAILBOX_REVISION);
+        pr_info("omap mailbox rev %d.%d\n", (l & 0xf0) >> 4, (l & 0x0f));
+
         /* set smart-idle & autoidle */
         l = mbox_read_reg(MAILBOX_SYSCONFIG);
         l |= 0x00000011;
@@ -183,6 +169,32 @@ static int omap2_mbox_is_irq(struct omap_mbox *mbox,
         return (enable & status & bit);
 }
 
+static void omap2_mbox_save_ctx(struct omap_mbox *mbox)
+{
+        int i;
+        struct omap_mbox2_priv *p = mbox->priv;
+
+        for (i = 0; i < MBOX_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;
+
+        for (i = 0; i < MBOX_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 = {
         .type           = OMAP_MBOX_TYPE2,
         .startup        = omap2_mbox_startup,
@@ -195,6 +207,8 @@ static struct omap_mbox_ops omap2_mbox_ops = {
         .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,
 };
 
 /*
@@ -209,15 +223,15 @@ static struct omap_mbox_ops omap2_mbox_ops = {
 /* DSP */
 static struct omap_mbox2_priv omap2_mbox_dsp_priv = {
         .tx_fifo = {
-                .msg            = MAILBOX_MESSAGE_0,
-                .fifo_stat      = MAILBOX_FIFOSTATUS_0,
+                .msg            = MAILBOX_MESSAGE(0),
+                .fifo_stat      = MAILBOX_FIFOSTATUS(0),
         },
         .rx_fifo = {
-                .msg            = MAILBOX_MESSAGE_1,
-                .msg_stat       = MAILBOX_MSGSTATUS_1,
+                .msg            = MAILBOX_MESSAGE(1),
+                .msg_stat       = MAILBOX_MSGSTATUS(1),
         },
-        .irqenable      = MAILBOX_IRQENABLE_0,
-        .irqstatus      = MAILBOX_IRQSTATUS_0,
+        .irqenable      = MAILBOX_IRQENABLE(0),
+        .irqstatus      = MAILBOX_IRQSTATUS(0),
         .notfull_bit    = MAILBOX_IRQ_NOTFULL(0),
         .newmsg_bit     = MAILBOX_IRQ_NEWMSG(1),
 };
@@ -229,18 +243,18 @@ struct omap_mbox mbox_dsp_info = {
 };
 EXPORT_SYMBOL(mbox_dsp_info);
 
-/* IVA */
+#if defined(CONFIG_ARCH_OMAP2420) /* IVA */
 static struct omap_mbox2_priv omap2_mbox_iva_priv = {
         .tx_fifo = {
-                .msg            = MAILBOX_MESSAGE_2,
-                .fifo_stat      = MAILBOX_FIFOSTATUS_2,
+                .msg            = MAILBOX_MESSAGE(2),
+                .fifo_stat      = MAILBOX_FIFOSTATUS(2),
         },
         .rx_fifo = {
-                .msg            = MAILBOX_MESSAGE_3,
-                .msg_stat       = MAILBOX_MSGSTATUS_3,
+                .msg            = MAILBOX_MESSAGE(3),
+                .msg_stat       = MAILBOX_MSGSTATUS(3),
         },
-        .irqenable      = MAILBOX_IRQENABLE_3,
-        .irqstatus      = MAILBOX_IRQSTATUS_3,
+        .irqenable      = MAILBOX_IRQENABLE(3),
+        .irqstatus      = MAILBOX_IRQSTATUS(3),
         .notfull_bit    = MAILBOX_IRQ_NOTFULL(2),
         .newmsg_bit     = MAILBOX_IRQ_NEWMSG(3),
 };
@@ -250,17 +264,12 @@ static struct omap_mbox mbox_iva_info = {
         .ops    = &omap2_mbox_ops,
         .priv   = &omap2_mbox_iva_priv,
 };
+#endif
 
-static int __init omap2_mbox_probe(struct platform_device *pdev)
+static int __devinit 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;
-        }
+        int ret;
 
         /* MBOX base */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -268,42 +277,61 @@ static int __init omap2_mbox_probe(struct platform_device *pdev)
                 dev_err(&pdev->dev, "invalid mem resource\n");
                 return -ENODEV;
         }
-        mbox_base = res->start;
+        mbox_base = ioremap(res->start, res->end - res->start);
+        if (!mbox_base)
+                return -ENOMEM;
 
-        /* DSP IRQ */
-        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-        if (unlikely(!res)) {
+        /* DSP or IVA2 IRQ */
+        mbox_dsp_info.irq = platform_get_irq(pdev, 0);
+        if (mbox_dsp_info.irq < 0) {
                 dev_err(&pdev->dev, "invalid irq resource\n");
-                return -ENODEV;
+                ret = -ENODEV;
+                goto err_dsp;
         }
-        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;
+        ret = omap_mbox_register(&pdev->dev, &mbox_dsp_info);
+        if (ret)
+                goto err_dsp;
+
+#if defined(CONFIG_ARCH_OMAP2420) /* IVA */
+        if (cpu_is_omap2420()) {
+                /* IVA IRQ */
+                res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+                if (unlikely(!res)) {
+                        dev_err(&pdev->dev, "invalid irq resource\n");
+                        ret = -ENODEV;
+                        goto err_iva1;
+                }
+                mbox_iva_info.irq = res->start;
+                ret = omap_mbox_register(&pdev->dev, &mbox_iva_info);
+                if (ret)
+                        goto err_iva1;
         }
-        mbox_iva_info.irq = res->start;
-
-        ret = omap_mbox_register(&mbox_iva_info);
+#endif
+        return 0;
 
+err_iva1:
+        omap_mbox_unregister(&mbox_dsp_info);
+err_dsp:
+        iounmap(mbox_base);
         return ret;
 }
 
-static int omap2_mbox_remove(struct platform_device *pdev)
+static int __devexit omap2_mbox_remove(struct platform_device *pdev)
 {
+#if defined(CONFIG_ARCH_OMAP2420)
+        omap_mbox_unregister(&mbox_iva_info);
+#endif
         omap_mbox_unregister(&mbox_dsp_info);
+        iounmap(mbox_base);
         return 0;
 }
 
 static struct platform_driver omap2_mbox_driver = {
         .probe = omap2_mbox_probe,
-        .remove = omap2_mbox_remove,
+        .remove = __devexit_p(omap2_mbox_remove),
         .driver = {
-                .name = "mailbox",
+                .name = "omap2-mailbox",
         },
 };
 
@@ -320,4 +348,7 @@ static void __exit omap2_mbox_exit(void)
 module_init(omap2_mbox_init);
 module_exit(omap2_mbox_exit);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("omap mailbox: omap2/3 architecture specific functions");
+MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>, Paul Mundt");
+MODULE_ALIAS("platform:omap2-mailbox");