summaryrefslogtreecommitdiff
path: root/drivers/usb/musb/omap3.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/musb/omap3.c')
-rw-r--r--drivers/usb/musb/omap3.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/usb/musb/omap3.c b/drivers/usb/musb/omap3.c
new file mode 100644
index 0000000..ea98c3c
--- /dev/null
+++ b/drivers/usb/musb/omap3.c
@@ -0,0 +1,134 @@
+/*
+ * 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;
+
+ /*
+ * OMAP3EVM uses ISP1504 phy and so
+ * twl4030 related init is not required.
+ */
+#ifdef CONFIG_TWL4030_USB
+ if (twl4030_usb_ulpi_init()) {
+ serial_printf("ERROR: %s Could not initialize PHY\n",
+ __PRETTY_FUNCTION__);
+ goto end;
+ }
+#endif
+ 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 */
+}