ARM: OMAP3: MUSB initialization for omap hw, v2

Create a generic board-file for initializing usb
on omap2430 and omap3 boards.

Patch modified by Tony to build the module based on
CONFIG_USB_MUSB_SOC. Also merged in a patch adding
the nop xceiv from Ajay Kumar Gupta <ajay.gupta@ti.com>.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 187 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
new file mode 100644
index 000000000000..fc74e913c415
--- /dev/null
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -0,0 +1,187 @@
+/*
+ * linux/arch/arm/mach-omap2/usb-musb.c
+ *
+ * This file will contain the board specific details for the
+ * MENTOR USB OTG controller on OMAP3430
+ *
+ * Copyright (C) 2007-2008 Texas Instruments
+ * Copyright (C) 2008 Nokia Corporation
+ * Author: Vikram Pandita
+ *
+ * Generalization by:
+ * Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * 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.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+
+#include <linux/usb/musb.h>
+
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <mach/pm.h>
+#include <mach/mux.h>
+#include <mach/usb.h>
+
+static struct resource musb_resources[] = {
+        [0] = { /* start and end set dynamically */
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = { /* general IRQ */
+                .start  = INT_243X_HS_USB_MC,
+                .flags  = IORESOURCE_IRQ,
+        },
+        [2] = { /* DMA IRQ */
+                .start  = INT_243X_HS_USB_DMA,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static int clk_on;
+
+static int musb_set_clock(struct clk *clk, int state)
+{
+        if (state) {
+                if (clk_on > 0)
+                        return -ENODEV;
+
+                clk_enable(clk);
+                clk_on = 1;
+        } else {
+                if (clk_on == 0)
+                        return -ENODEV;
+
+                clk_disable(clk);
+                clk_on = 0;
+        }
+
+        return 0;
+}
+
+static struct musb_hdrc_eps_bits musb_eps[] = {
+        {       "ep1_tx", 10,   },
+        {       "ep1_rx", 10,   },
+        {       "ep2_tx", 9,    },
+        {       "ep2_rx", 9,    },
+        {       "ep3_tx", 3,    },
+        {       "ep3_rx", 3,    },
+        {       "ep4_tx", 3,    },
+        {       "ep4_rx", 3,    },
+        {       "ep5_tx", 3,    },
+        {       "ep5_rx", 3,    },
+        {       "ep6_tx", 3,    },
+        {       "ep6_rx", 3,    },
+        {       "ep7_tx", 3,    },
+        {       "ep7_rx", 3,    },
+        {       "ep8_tx", 2,    },
+        {       "ep8_rx", 2,    },
+        {       "ep9_tx", 2,    },
+        {       "ep9_rx", 2,    },
+        {       "ep10_tx", 2,   },
+        {       "ep10_rx", 2,   },
+        {       "ep11_tx", 2,   },
+        {       "ep11_rx", 2,   },
+        {       "ep12_tx", 2,   },
+        {       "ep12_rx", 2,   },
+        {       "ep13_tx", 2,   },
+        {       "ep13_rx", 2,   },
+        {       "ep14_tx", 2,   },
+        {       "ep14_rx", 2,   },
+        {       "ep15_tx", 2,   },
+        {       "ep15_rx", 2,   },
+};
+
+static struct musb_hdrc_config musb_config = {
+        .multipoint     = 1,
+        .dyn_fifo       = 1,
+        .soft_con       = 1,
+        .dma            = 1,
+        .num_eps        = 16,
+        .dma_channels   = 7,
+        .dma_req_chan   = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
+        .ram_bits       = 12,
+        .eps_bits       = musb_eps,
+};
+
+static struct musb_hdrc_platform_data musb_plat = {
+#ifdef CONFIG_USB_MUSB_OTG
+        .mode           = MUSB_OTG,
+#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
+        .mode           = MUSB_HOST,
+#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
+        .mode           = MUSB_PERIPHERAL,
+#endif
+        /* .clock is set dynamically */
+        .set_clock      = musb_set_clock,
+        .config         = &musb_config,
+
+        /* REVISIT charge pump on TWL4030 can supply up to
+         * 100 mA ... but this value is board-specific, like
+         * "mode", and should be passed to usb_musb_init().
+         */
+        .power          = 50,                   /* up to 100 mA */
+};
+
+static u64 musb_dmamask = DMA_32BIT_MASK;
+
+static struct platform_device musb_device = {
+        .name           = "musb_hdrc",
+        .id             = -1,
+        .dev = {
+                .dma_mask               = &musb_dmamask,
+                .coherent_dma_mask      = DMA_32BIT_MASK,
+                .platform_data          = &musb_plat,
+        },
+        .num_resources  = ARRAY_SIZE(musb_resources),
+        .resource       = musb_resources,
+};
+
+#ifdef CONFIG_NOP_USB_XCEIV
+static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
+
+static struct platform_device nop_xceiv_device = {
+        .name           = "nop_usb_xceiv",
+        .id             = -1,
+        .dev = {
+                .dma_mask               = &nop_xceiv_dmamask,
+                .coherent_dma_mask      = DMA_32BIT_MASK,
+                .platform_data          = NULL,
+        },
+};
+#endif
+
+void __init usb_musb_init(void)
+{
+        if (cpu_is_omap243x())
+                musb_resources[0].start = OMAP243X_HS_BASE;
+        else
+                musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
+        musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
+
+        /*
+         * REVISIT: This line can be removed once all the platforms using
+         * musb_core.c have been converted to use use clkdev.
+         */
+        musb_plat.clock = "ick";
+
+#ifdef CONFIG_NOP_USB_XCEIV
+        if (platform_device_register(&nop_xceiv_device) < 0) {
+                printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
+                return;
+        }
+#endif
+
+        if (platform_device_register(&musb_device) < 0) {
+                printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
+                return;
+        }
+}