[PATCH] OMAP2: add USB platform data and initialization for Nokia N800 and N810

Luke-Jr
2009-12-29T07:52:39Z

Add platform data and initialization for USB on Nokia N800 and N810 devices
via the TUSB6010 chipset.

Tested on Nokia N810 in Linux-OMAP tree. Mainline is not bootable yet.

Signed-off-by: Luke Dashjr <luke_linuxkern@dashjr.org>
---
arch/arm/mach-omap2/Kconfig | 5 +
arch/arm/mach-omap2/Makefile | 1 +
arch/arm/mach-omap2/board-n8x0-usb.c | 173 ++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/board-n8x0.c | 8 ++
4 files changed, 187 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/board-n8x0-usb.c

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 10eafa7..e3c913c 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -117,6 +117,11 @@ config MACH_NOKIA_N8X0
select MACH_NOKIA_N810
select MACH_NOKIA_N810_WIMAX

+config MACH_NOKIA_N8X0_USB
+ bool
+ depends on MACH_NOKIA_N8X0 && MACH_OMAP2_TUSB6010
+ default y
+
config MACH_NOKIA_RX51
bool "Nokia RX-51 board"
depends on ARCH_OMAP3 && ARCH_OMAP34XX
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b32678b..e890b2b 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -86,6 +86,7 @@ obj-$(CONFIG_MACH_OMAP3_PANDORA) += board-omap3pandora.o \
obj-$(CONFIG_MACH_OMAP_3430SDP) += board-3430sdp.o \
mmc-twl4030.o
obj-$(CONFIG_MACH_NOKIA_N8X0) += board-n8x0.o
+obj-$(CONFIG_MACH_NOKIA_N8X0_USB) += board-n8x0-usb.o
obj-$(CONFIG_MACH_NOKIA_RX51) += board-rx51.o \
board-rx51-sdram.o \
board-rx51-peripherals.o \
diff --git a/arch/arm/mach-omap2/board-n8x0-usb.c b/arch/arm/mach-omap2/board-n8x0-usb.c
new file mode 100644
index 0000000..2254ebd
--- /dev/null
+++ b/arch/arm/mach-omap2/board-n8x0-usb.c
@@ -0,0 +1,173 @@
+/*
+ * linux/arch/arm/mach-omap2/board-n8x0-usb.c
+ *
+ * Copyright (C) 2006 Nokia Corporation
+ * Author: Juha Yrjola
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/usb/musb.h>
+
+#include <plat/gpmc.h>
+
+#define TUSB_ASYNC_CS 1
+#define TUSB_SYNC_CS 4
+#define GPIO_TUSB_INT 58
+#define GPIO_TUSB_ENABLE 0
+
+static int tusb_set_power(int state);
+static int tusb_set_clock(struct clk *osc_ck, int state);
+
+#if defined(CONFIG_USB_MUSB_OTG)
+# define BOARD_MODE MUSB_OTG
+#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
+# define BOARD_MODE MUSB_PERIPHERAL
+#else /* defined(CONFIG_USB_MUSB_HOST) */
+# define BOARD_MODE MUSB_HOST
+#endif
+
+static struct musb_hdrc_eps_bits musb_eps[] = {
+ { "ep1_tx", 5, },
+ { "ep1_rx", 5, },
+ { "ep2_tx", 5, },
+ { "ep2_rx", 5, },
+ { "ep3_tx", 3, },
+ { "ep3_rx", 3, },
+ { "ep4_tx", 3, },
+ { "ep4_rx", 3, },
+ { "ep5_tx", 2, },
+ { "ep5_rx", 2, },
+ { "ep6_tx", 2, },
+ { "ep6_rx", 2, },
+ { "ep7_tx", 2, },
+ { "ep7_rx", 2, },
+ { "ep8_tx", 2, },
+ { "ep8_rx", 2, },
+ { "ep9_tx", 2, },
+ { "ep9_rx", 2, },
+ { "ep10_tx", 2, },
+ { "ep10_rx", 2, },
+ { "ep11_tx", 2, },
+ { "ep11_rx", 2, },
+ { "ep12_tx", 2, },
+ { "ep12_rx", 2, },
+ { "ep13_tx", 2, },
+ { "ep13_rx", 2, },
+ { "ep14_tx", 2, },
+ { "ep14_rx", 2, },
+ { "ep15_tx", 2, },
+ { "ep15_rx", 2, },
+};
+
+static struct musb_hdrc_config musb_config = {
+ .multipoint = 1,
+ .dyn_fifo = 1,
+ .soft_con = 1,
+ .dma = 1,
+ .num_eps = 16,
+ .dma_channels = 7,
+ .ram_bits = 12,
+ .eps_bits = musb_eps,
+};
+
+static struct musb_hdrc_platform_data tusb_data = {
+ .mode = BOARD_MODE,
+ .set_power = tusb_set_power,
+ .set_clock = tusb_set_clock,
+ .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
+ .power = 100, /* Max 100 mA VBUS for host mode */
+ .clock = "osc_ck",
+ .config = &musb_config,
+};
+
+/*
+ * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
+ * 1.5 V voltage regulators of PM companion chip. Companion chip will then
+ * provide then PGOOD signal to TUSB6010 which will release it from reset.
+ */
+static int tusb_set_power(int state)
+{
+ int i, retval = 0;
+
+ if (state) {
+ gpio_set_value(GPIO_TUSB_ENABLE, 1);
+ msleep(1);
+
+ /* Wait until TUSB6010 pulls INT pin down */
+ i = 100;
+ while (i && gpio_get_value(GPIO_TUSB_INT)) {
+ msleep(1);
+ i--;
+ }
+
+ if (!i) {
+ printk(KERN_ERR "tusb: powerup failed\n");
+ retval = -ENODEV;
+ }
+ } else {
+ gpio_set_value(GPIO_TUSB_ENABLE, 0);
+ msleep(10);
+ }
+
+ return retval;
+}
+
+static int osc_ck_on;
+
+static int tusb_set_clock(struct clk *osc_ck, int state)
+{
+ if (state) {
+ if (osc_ck_on > 0)
+ return -ENODEV;
+
+ clk_enable(osc_ck);
+ osc_ck_on = 1;
+ } else {
+ if (osc_ck_on == 0)
+ return -ENODEV;
+
+ clk_disable(osc_ck);
+ osc_ck_on = 0;
+ }
+
+ return 0;
+}
+
+void __init n8x0_usb_init(void)
+{
+ int ret = 0;
+ static char announce[] __initdata = KERN_INFO "TUSB 6010\n";
+
+ /* PM companion chip power control pin */
+ ret = gpio_request(GPIO_TUSB_ENABLE, "TUSB6010 enable");
+ if (ret != 0) {
+ printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
+ GPIO_TUSB_ENABLE);
+ return;
+ }
+ gpio_direction_output(GPIO_TUSB_ENABLE, 0);
+
+ tusb_set_power(0);
+
+ ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
+ TUSB_ASYNC_CS, TUSB_SYNC_CS,
+ GPIO_TUSB_INT, 0x3f);
+ if (ret != 0)
+ goto err;
+
+ printk(announce);
+
+ return;
+
+err:
+ gpio_free(GPIO_TUSB_ENABLE);
+}
diff --git a/arch/arm/mach-omap2/board-n8x0.c b/arch/arm/mach-omap2/board-n8x0.c
index 764ab1e..c9395e1 100644
--- a/arch/arm/mach-omap2/board-n8x0.c
+++ b/arch/arm/mach-omap2/board-n8x0.c
@@ -109,8 +109,16 @@ static void __init n8x0_init_irq(void)
omap_gpio_init();
}

+#ifdef CONFIG_MACH_NOKIA_N8X0_LCD
+extern void n8x0_usb_init(void);
+#else
+static inline void n8x0_usb_init (void) {}
+#endif
+
static void __init n8x0_init_machine(void)
{
+ n8x0_usb_init();
+
/* FIXME: add n810 spi devices */
spi_register_board_info(n800_spi_board_info,
ARRAY_SIZE(n800_spi_board_info));
--
1.6.4.4