summaryrefslogtreecommitdiff
path: root/drivers/usb/musb/omap3.c
diff options
context:
space:
mode:
authorTom Rix <Tom.Rix@windriver.com>2009-10-31 12:37:41 -0500
committerRemy Bohmer <linux@bohmer.net>2009-12-20 12:47:37 +0100
commitf298e4b6dd56df3e35a13a6ddd572ca3baf06ad2 (patch)
treedf52bb5df9b9d717e1927bd652b8cdcc04d35f59 /drivers/usb/musb/omap3.c
parentbffbb2a86d2a3aa28bd8f9869aa553082fb5af5f (diff)
OMAP3 Add usb device support
This change adds the usb device support for musb. Omap3 platform support added at the same level as davinci. The interface for usbtty to use the musb device support was added. Verified on omap3 beagle, zoom1 and zoom2. Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Diffstat (limited to 'drivers/usb/musb/omap3.c')
-rw-r--r--drivers/usb/musb/omap3.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/usb/musb/omap3.c b/drivers/usb/musb/omap3.c
new file mode 100644
index 0000000000..3e502e7d85
--- /dev/null
+++ b/drivers/usb/musb/omap3.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix@windriver.com>
+ *
+ * This is file is based on
+ * repository git.gitorious.org/u-boot-omap3/mainline.git,
+ * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c
+ *
+ * This is the unique part of its copyright :
+ *
+ * ------------------------------------------------------------------------
+ *
+ * Copyright (c) 2009 Texas Instruments
+ *
+ * ------------------------------------------------------------------------
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <twl4030.h>
+#include "omap3.h"
+
+static int platform_needs_initialization = 1;
+
+struct musb_config musb_cfg = {
+ (struct musb_regs *)MENTOR_USB0_BASE,
+ OMAP3_USB_TIMEOUT,
+ 0
+};
+
+/*
+ * OMAP3 USB OTG registers.
+ */
+struct omap3_otg_regs {
+ u32 revision;
+ u32 sysconfig;
+ u32 sysstatus;
+ u32 interfsel;
+ u32 simenable;
+ u32 forcestdby;
+};
+
+static struct omap3_otg_regs *otg;
+
+#define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE 0x2000
+#define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE 0x1000
+#define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE 0x0010
+#define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE 0x0008
+#define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP 0x0004
+#define OMAP3_OTG_SYSCONFIG_SOFTRESET 0x0002
+#define OMAP3_OTG_SYSCONFIG_AUTOIDLE 0x0001
+
+#define OMAP3_OTG_SYSSTATUS_RESETDONE 0x0001
+
+#define OMAP3_OTG_INTERFSEL_OMAP 0x0001
+
+#define OMAP3_OTG_FORCESTDBY_STANDBY 0x0001
+
+
+#ifdef DEBUG_MUSB_OMAP3
+static void musb_db_otg_regs(void)
+{
+ u32 l;
+ l = readl(&otg->revision);
+ serial_printf("OTG_REVISION 0x%x\n", l);
+ l = readl(&otg->sysconfig);
+ serial_printf("OTG_SYSCONFIG 0x%x\n", l);
+ l = readl(&otg->sysstatus);
+ serial_printf("OTG_SYSSTATUS 0x%x\n", l);
+ l = readl(&otg->interfsel);
+ serial_printf("OTG_INTERFSEL 0x%x\n", l);
+ l = readl(&otg->forcestdby);
+ serial_printf("OTG_FORCESTDBY 0x%x\n", l);
+}
+#endif
+
+int musb_platform_init(void)
+{
+ int ret = -1;
+
+ if (platform_needs_initialization) {
+ u32 stdby;
+
+ if (twl4030_usb_ulpi_init()) {
+ serial_printf("ERROR: %s Could not initialize PHY\n",
+ __PRETTY_FUNCTION__);
+ goto end;
+ }
+
+ otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
+
+ /* Set OTG to always be on */
+ writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
+ OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
+
+ /* Set the interface */
+ writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
+
+ /* Clear force standby */
+ stdby = readl(&otg->forcestdby);
+ stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
+ writel(stdby, &otg->forcestdby);
+
+ platform_needs_initialization = 0;
+ }
+
+ ret = platform_needs_initialization;
+end:
+ return ret;
+
+}
+
+void musb_platform_deinit(void)
+{
+ /* noop */
+}