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[PATCH 1/8] bcm63xx: add infrastructure for MPI-connected VoIP DSP

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 1/8] bcm63xx: add infrastructure for MPI-connected VoIP DSP
From: Florian Fainelli <florian@openwrt.org>
Date: Fri, 7 Aug 2009 23:46:21 +0200
Cc: Maxime Bizon <mbizon@freebox.fr>, linux-mips@linux-mips.org
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This patch adds the required infrastructure to register
a MPI and GPIO connected VoIP DSP. We will register
devices in a subsequent patch.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
diff --git a/arch/mips/bcm63xx/Makefile b/arch/mips/bcm63xx/Makefile
index 92d07f0..70ba038 100644
--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -4,6 +4,7 @@ obj-y           += dev-pcmcia.o
 obj-y          += dev-usb-ohci.o
 obj-y          += dev-usb-ehci.o
 obj-y          += dev-enet.o
+obj-y          += dev-dsp.o
 obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
 
 obj-y          += boards/
diff --git a/arch/mips/bcm63xx/dev-dsp.c b/arch/mips/bcm63xx/dev-dsp.c
new file mode 100644
index 0000000..08a2f75
--- /dev/null
+++ b/arch/mips/bcm63xx/dev-dsp.c
@@ -0,0 +1,56 @@
+/*
+ * Broadcom BCM63xx VoIP DSP registration
+ *
+ * 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.
+ *
+ * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org> 
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_dev_dsp.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_io.h>
+
+static struct resource voip_dsp_resources[] = {
+       {
+               .start          = -1, /* filled at runtime */
+               .end            = -1, /* filled at runtime */
+               .flags          = IORESOURCE_MEM,
+       },
+       {
+               .start          = -1, /* filled at runtime */
+               .flags          = IORESOURCE_IRQ,
+       },
+};
+
+static struct platform_device bcm63xx_voip_dsp_device = {
+       .name           = "bcm63xx-voip-dsp",
+       .id             = 0,
+       .num_resources  = ARRAY_SIZE(voip_dsp_resources),
+       .resource       = voip_dsp_resources,
+};
+
+int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd)
+{
+       struct bcm63xx_dsp_platform_data *dpd;
+       u32 val;
+
+       /* Get the memory window */
+       val = bcm_mpi_readl(MPI_CSBASE_REG(pd->cs - 1));
+       val &= MPI_CSBASE_BASE_MASK;
+       voip_dsp_resources[0].start = val;
+       voip_dsp_resources[0].end = val + 0xFFFFFFF;
+       voip_dsp_resources[1].start = pd->ext_irq;
+
+       /* copy given platform data */
+       dpd = bcm63xx_voip_dsp_device.dev.platform_data;
+       memcpy(dpd, pd, sizeof (*pd));
+
+       return platform_device_register(&bcm63xx_voip_dsp_device);
+}
diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h 
b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h
new file mode 100644
index 0000000..b587d45
--- /dev/null
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h
@@ -0,0 +1,13 @@
+#ifndef __BCM63XX_DSP_H
+#define __BCM63XX_DSP_H
+
+struct bcm63xx_dsp_platform_data {
+       unsigned gpio_rst;
+       unsigned gpio_int;
+       unsigned cs;
+       unsigned ext_irq;
+};
+
+int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd);
+
+#endif /* __BCM63XX_DSP_H */
diff --git a/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h 
b/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
index 17e4e7e..9fde025 100644
--- a/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
+++ b/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
@@ -3,6 +3,7 @@
 
 #include <linux/types.h>
 #include <bcm63xx_dev_enet.h>
+#include <bcm63xx_dev_dsp.h>
 
 /*
  * flash mapping
@@ -41,10 +42,14 @@ struct board_info {
        unsigned int    has_pccard:1;
        unsigned int    has_ohci0:1;
        unsigned int    has_ehci0:1;
+       unsigned int    has_dsp:1;
 
        /* ethernet config */
        struct bcm63xx_enet_platform_data enet0;
        struct bcm63xx_enet_platform_data enet1;
+
+       /* DSP config */
+       struct bcm63xx_dsp_platform_data dsp;
 };
 
 #endif /* ! BOARD_BCM963XX_H_ */

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