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Date: Tue, 19 Oct 2010 10:08:11 +0300
From: Felipe Balbi <balbi@...com>
To: Greg KH <greg@...ah.com>
Cc: Linux USB Mailing List <linux-usb@...r.kernel.org>,
Ajay Kumar Gupta <ajay.gupta@...com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-omap@...r.kernel.org, Felipe Balbi <balbi@...com>
Subject: [PATCH 1/3] AM35x: Add musb support
From: Ajay Kumar Gupta <ajay.gupta@...com>
AM35x has musb interface (version 1.8) and uses CPPI41 DMA engine.
It has USB phy built inside the IP itself.
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@...com>
Acked-by: Tony Lindgren <tony@...mide.com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-omap@...r.kernel.org
Signed-off-by: Felipe Balbi <balbi@...com>
---
arch/arm/mach-omap2/board-am3517evm.c | 31 +++++++++++++++++++++++++++++++
arch/arm/mach-omap2/usb-musb.c | 4 ++++
arch/arm/plat-omap/include/plat/usb.h | 21 +++++++++++++++++++++
3 files changed, 56 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c
index 4d0f585..6d352a2 100644
--- a/arch/arm/mach-omap2/board-am3517evm.c
+++ b/arch/arm/mach-omap2/board-am3517evm.c
@@ -35,6 +35,7 @@
#include <plat/control.h>
#include <plat/usb.h>
#include <plat/display.h>
+#include <plat/control.h>
#include "mux.h"
@@ -375,6 +376,31 @@ static void __init am3517_evm_init_irq(void)
omap_gpio_init();
}
+static struct omap_musb_board_data musb_board_data = {
+ .interface_type = MUSB_INTERFACE_ULPI,
+ .mode = MUSB_OTG,
+ .power = 500,
+};
+
+static __init void am3517_evm_musb_init(void)
+{
+ u32 devconf2;
+
+ /*
+ * Set up USB clock/mode in the DEVCONF2 register.
+ */
+ devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
+
+ /* USB2.0 PHY reference clock is 13 MHz */
+ devconf2 &= ~(CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE);
+ devconf2 |= CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN
+ | CONF2_DATPOL;
+
+ omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
+
+ usb_musb_init(&musb_board_data);
+}
+
static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
#if defined(CONFIG_PANEL_SHARP_LQ043T1DG01) || \
@@ -393,6 +419,8 @@ static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
+ /* USB OTG DRVVBUS offset = 0x212 */
+ OMAP3_MUX(SAD2D_MCAD23, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLDOWN),
{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#else
@@ -459,6 +487,9 @@ static void __init am3517_evm_init(void)
ARRAY_SIZE(am3517evm_i2c1_boardinfo));
/*Ethernet*/
am3517_evm_ethernet_init(&am3517_evm_emac_pdata);
+
+ /* MUSB */
+ am3517_evm_musb_init();
}
MACHINE_START(OMAP3517EVM, "OMAP3517/AM3517 EVM")
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 33a5cde..7260558 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -28,6 +28,7 @@
#include <mach/hardware.h>
#include <mach/irqs.h>
+#include <mach/am35xx.h>
#include <plat/usb.h>
#ifdef CONFIG_USB_MUSB_SOC
@@ -89,6 +90,9 @@ void __init usb_musb_init(struct omap_musb_board_data *board_data)
{
if (cpu_is_omap243x()) {
musb_resources[0].start = OMAP243X_HS_BASE;
+ } else if (cpu_is_omap3517() || cpu_is_omap3505()) {
+ musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE;
+ musb_resources[1].start = INT_35XX_USBOTG_IRQ;
} else if (cpu_is_omap34xx()) {
musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
} else if (cpu_is_omap44xx()) {
diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-omap/include/plat/usb.h
index 2a9427c..9feddac 100644
--- a/arch/arm/plat-omap/include/plat/usb.h
+++ b/arch/arm/plat-omap/include/plat/usb.h
@@ -218,6 +218,27 @@ static inline omap2_usbfs_init(struct omap_usb_config *pdata)
# define USBT2TLL5PI (1 << 17)
# define USB0PUENACTLOI (1 << 16)
# define USBSTANDBYCTRL (1 << 15)
+/* AM35x */
+/* USB 2.0 PHY Control */
+#define CONF2_PHY_GPIOMODE (1 << 23)
+#define CONF2_OTGMODE (3 << 14)
+#define CONF2_NO_OVERRIDE (0 << 14)
+#define CONF2_FORCE_HOST (1 << 14)
+#define CONF2_FORCE_DEVICE (2 << 14)
+#define CONF2_FORCE_HOST_VBUS_LOW (3 << 14)
+#define CONF2_SESENDEN (1 << 13)
+#define CONF2_VBDTCTEN (1 << 12)
+#define CONF2_REFFREQ_24MHZ (2 << 8)
+#define CONF2_REFFREQ_26MHZ (7 << 8)
+#define CONF2_REFFREQ_13MHZ (6 << 8)
+#define CONF2_REFFREQ (0xf << 8)
+#define CONF2_PHYCLKGD (1 << 7)
+#define CONF2_VBUSSENSE (1 << 6)
+#define CONF2_PHY_PLLON (1 << 5)
+#define CONF2_RESET (1 << 4)
+#define CONF2_PHYPWRDN (1 << 3)
+#define CONF2_OTGPWRDN (1 << 2)
+#define CONF2_DATPOL (1 << 1)
#if defined(CONFIG_ARCH_OMAP1) && defined(CONFIG_USB)
u32 omap1_usb0_init(unsigned nwires, unsigned is_device);
--
1.7.3.rc0.35.g8ac8c
--
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