* Tony Lindgren <tony@xxxxxxxxxxx> [090212 11:16]:
> Hi Felipe & Dave,
>
> While creating a patch for usb-musb.c init code for mainline
> kernel, I ended up cleaning up following stuff in the l-o tree.
>
> Does it look OK to you?
And here's what the musb_init patch for the mainline. No boards are
calling musb_init() yet, but that's easy to append.
The clock function might cause some merge issues.. I guess eventually
the driver should just call clk_enable/disable once the omap2 clock
merge is done.
Regards,
Tony
>From 545f2a61242ca4d27bb22d54a1f0b0bfcea86c5f Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Date: Wed, 11 Feb 2009 17:33:49 -0800
Subject: [PATCH] ARM: OMAP3: MUSB initialization for omap hw
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.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b239c7d..dd63683 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -44,3 +44,5 @@ obj-$(CONFIG_MACH_NOKIA_RX51) += board-rx51.o \
board-rx51-peripherals.o \
mmc-twl4030.o
+# Platform specific device init code
+obj-$(CONFIG_USB_MUSB_SOC) += usb-musb.o
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
new file mode 100644
index 0000000..327af7d
--- /dev/null
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -0,0 +1,165 @@
+/*
+ * 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@xxxxxxxxx>
+ *
+ * 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 <asm/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,
+};
+
+void __init usb_musb_init(void)
+{
+ if (cpu_is_omap243x()) {
+ musb_resources[0].start = OMAP243X_HS_BASE;
+ musb_plat.clock = "usbhs_ick";
+ } else {
+ musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
+ musb_plat.clock = "hsotgusb_ick";
+ }
+
+ musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
+
+ if (platform_device_register(&musb_device) < 0) {
+ printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
+ return;
+ }
+}
diff --git a/arch/arm/plat-omap/include/mach/usb.h b/arch/arm/plat-omap/include/mach/usb.h
index a56a610..ddc0522 100644
--- a/arch/arm/plat-omap/include/mach/usb.h
+++ b/arch/arm/plat-omap/include/mach/usb.h
@@ -27,6 +27,14 @@
#define UDC_BASE OMAP2_UDC_BASE
#define OMAP_OHCI_BASE OMAP2_OHCI_BASE
+#ifdef CONFIG_USB_MUSB_SOC
+extern void usb_musb_init(void);
+#else
+static inline void usb_musb_init(void)
+{
+}
+#endif
+
#endif
/*-------------------------------------------------------------------------*/
