AM35x has musb interface (version 1.8) and uses CPPI41 DMA engine.
It has USB phy built inside the IP itself.
Also added ARCH_AM35x which is required to differentiate musb ips
between OMAP3x and AM35x. This config would be used for below purposes,
- Select am35x.c instead of omap2430.c for compilation
at drivers/usb/musb directory. Please note there are
significant differneces in these two files as musb ip
in quite different on AM35x.
- Select workaround codes applicable for AM35x musb issues.
one such workaround is for bytewise read issue on AM35x.
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
---
Patches created against recent linus's tree.
arch/arm/mach-omap2/Kconfig | 1 +
arch/arm/mach-omap2/board-am3517evm.c | 30 ++++++++++++++++++++++++++++++
arch/arm/mach-omap2/usb-musb.c | 4 ++++
arch/arm/plat-omap/Kconfig | 8 ++++++++
arch/arm/plat-omap/include/plat/usb.h | 21 +++++++++++++++++++++
5 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index b31b6f1..52a6752 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -84,6 +84,7 @@ config MACH_OMAP3517EVM
bool "OMAP3517/ AM3517 EVM board"
depends on ARCH_OMAP3
select OMAP_PACKAGE_CBB
+ select ARCH_AM35x
config MACH_OMAP3_PANDORA
bool "OMAP3 Pandora"
diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c
index af383a8..7f42a1b 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 +376,30 @@ 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);
+ devconf2 |= CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN;
+
+ 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 +418,8 @@ 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 +486,9 @@ 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();
}
static void __init am3517_evm_map_io(void)
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 96f6787..a54f360 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -29,6 +29,7 @@
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <plat/mux.h>
+#include <mach/am35xx.h>
#include <plat/usb.h>
#ifdef CONFIG_USB_MUSB_SOC
@@ -90,6 +91,9 @@ 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/Kconfig b/arch/arm/plat-omap/Kconfig
index 78b49a6..3f33d75 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -5,6 +5,14 @@ menu "TI OMAP Implementations"
config ARCH_OMAP_OTG
bool
+config ARCH_AM35x
+ bool
+ help
+ Select this option if your platform is based on AM35x. As
+ AM35x has an updated MUSB with CPPI4.1 DMA so this config
+ is introduced to differentiate musb ip between OMAP3x and
+ AM35x platforms.
+
choice
prompt "OMAP System Type"
default ARCH_OMAP2PLUS
diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-omap/include/plat/usb.h
index 98eef53..76d2e29 100644
--- a/arch/arm/plat-omap/include/plat/usb.h
+++ b/arch/arm/plat-omap/include/plat/usb.h
@@ -191,5 +191,26 @@ void omap_usb_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)
#endif /* __ASM_ARCH_OMAP_USB_H */
--
1.6.2.4
--
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