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Subject[PATCH 28/90] ARM: OMAP: USB peripheral support on H4
Date
From: David Brownell <dbrownell@users.sourceforge.net>

H4 has two peripheral ports, one for "download" and one for OTG.
The one to use is selected through Kconfig.

NOTE: not yet working; I suspect there's a clock still turned off
or something like that, since neither port responds.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap2/Kconfig | 21 ++++++++++++++++++
arch/arm/mach-omap2/board-h4.c | 46 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 47c8b57..d4a366d 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -26,6 +26,27 @@ config MACH_OMAP_H4
depends on ARCH_OMAP2 && ARCH_OMAP24XX
select OMAP_DEBUG_DEVICES

+config MACH_OMAP_H4_OTG
+ bool "Use USB OTG connector, not device connector (S1.10)"
+ depends on MACH_OMAP_H4
+ help
+ Set this if you've set S1.10 (on the mainboard) to use the
+ Mini-AB (OTG) connector and OTG transceiver with the USB0
+ port, instead of the Mini-B ("download") connector with its
+ non-OTG transceiver.
+
+ Note that the "download" connector can be used to bootstrap
+ the system from the OMAP mask ROM. Also, since this is a
+ development platform, you can also force the OTG port into
+ a non-OTG operational mode.
+
+config MACH_OMAP2_H4_USB1
+ bool "Use USB1 port, not UART2 (S3.3)"
+ depends on MACH_OMAP_H4
+ help
+ Set this if you've set SW3.3 (on the CPU card) so that the
+ expansion connectors receive USB1 signals instead of UART2.
+
config MACH_OMAP_APOLLON
bool "OMAP 2420 Apollon board"
depends on ARCH_OMAP2 && ARCH_OMAP24XX
diff --git a/arch/arm/mach-omap2/board-h4.c b/arch/arm/mach-omap2/board-h4.c
index f125f43..b1cebdd 100644
--- a/arch/arm/mach-omap2/board-h4.c
+++ b/arch/arm/mach-omap2/board-h4.c
@@ -278,7 +278,11 @@ static void __init omap_h4_init_irq(void)
}

static struct omap_uart_config h4_uart_config __initdata = {
+#ifdef CONFIG_MACH_OMAP2_H4_USB1
+ .enabled_uarts = ((1 << 0) | (1 << 1)),
+#else
.enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
+#endif
};

static struct omap_mmc_config h4_mmc_config __initdata = {
@@ -295,10 +299,44 @@ static struct omap_lcd_config h4_lcd_config __initdata = {
.ctrl_name = "internal",
};

+static struct omap_usb_config h4_usb_config __initdata = {
+#ifdef CONFIG_MACH_OMAP2_H4_USB1
+ /* NOTE: usb1 could also be used with 3 wire signaling */
+ .pins[1] = 4,
+#endif
+
+#ifdef CONFIG_MACH_OMAP_H4_OTG
+ /* S1.10 ON -- USB OTG port
+ * usb0 switched to Mini-AB port and isp1301 transceiver;
+ * S2.POS3 = OFF, S2.POS4 = ON ... to allow battery charging
+ */
+ .otg = 1,
+ .pins[0] = 4,
+#ifdef CONFIG_USB_GADGET_OMAP
+ /* use OTG cable, or standard A-to-MiniB */
+ .hmc_mode = 0x14, /* 0:dev/otg 1:host 2:disable */
+#elif defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
+ /* use OTG cable, or NONSTANDARD (B-to-MiniB) */
+ .hmc_mode = 0x11, /* 0:host 1:host 2:disable */
+#endif /* XX */
+
+#else
+ /* S1.10 OFF -- usb "download port"
+ * usb0 switched to Mini-B port and isp1105 transceiver;
+ * S2.POS3 = ON, S2.POS4 = OFF ... to enable battery charging
+ */
+ .register_dev = 1,
+ .pins[0] = 3,
+// .hmc_mode = 0x14, /* 0:dev 1:host 2:disable */
+ .hmc_mode = 0x00, /* 0:dev|otg 1:disable 2:disable */
+#endif
+};
+
static struct omap_board_config_kernel h4_config[] = {
{ OMAP_TAG_UART, &h4_uart_config },
{ OMAP_TAG_MMC, &h4_mmc_config },
{ OMAP_TAG_LCD, &h4_lcd_config },
+ { OMAP_TAG_USB, &h4_usb_config },
};

static void __init omap_h4_init(void)
@@ -321,6 +359,14 @@ static void __init omap_h4_init(void)
}
#endif

+#ifdef CONFIG_MACH_OMAP2_H4_USB1
+ /* S3.3 controls whether these pins are for UART2 or USB1 */
+ omap_cfg_reg(N14_24XX_USB1_SE0);
+ omap_cfg_reg(P15_24XX_USB1_DAT);
+ omap_cfg_reg(W20_24XX_USB1_TXEN);
+ omap_cfg_reg(V19_24XX_USB1_RCV);
+#endif
+
platform_add_devices(h4_devices, ARRAY_SIZE(h4_devices));
omap_board_config = h4_config;
omap_board_config_size = ARRAY_SIZE(h4_config);
--
1.4.4.2
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