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authorFrancisco Alecrim <francisco.alecrim@openbossa.org>2010-03-10 18:52:24 -0800
committerTony Lindgren <tony@atomide.com>2010-03-11 10:22:39 -0800
commit97b9ad1633ed3724e0563d250850763d20275da7 (patch)
treef7902dfc30c854c69a02b0e2e5ea5096e121b135 /arch/arm/mach-omap2/board-n8x0.c
parentd660f9a26ef81c3bbced92514ffbe82e1b882ee1 (diff)
downloadblackbird-op-linux-97b9ad1633ed3724e0563d250850763d20275da7.tar.gz
blackbird-op-linux-97b9ad1633ed3724e0563d250850763d20275da7.zip
omap2: add USB initialization for tusb6010
Based on Kalle's and Tony's patches. Some variables re-organized and unused code removed. Signed-off-by: Kalle Valo <kalle.valo@iki.fi> Signed-off-by: Francisco Alecrim <francisco.alecrim@openbossa.org> [tony@atomide.com: this is needed to fix the related tusb6010 DMA API changes] Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/board-n8x0.c')
-rw-r--r--arch/arm/mach-omap2/board-n8x0.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-n8x0.c b/arch/arm/mach-omap2/board-n8x0.c
index 4cab0522d7ce..da9bcb898991 100644
--- a/arch/arm/mach-omap2/board-n8x0.c
+++ b/arch/arm/mach-omap2/board-n8x0.c
@@ -37,6 +37,103 @@ static int slot1_cover_open;
static int slot2_cover_open;
static struct device *mmc_device;
+#define TUSB6010_ASYNC_CS 1
+#define TUSB6010_SYNC_CS 4
+#define TUSB6010_GPIO_INT 58
+#define TUSB6010_GPIO_ENABLE 0
+#define TUSB6010_DMACHAN 0x3f
+
+#if defined(CONFIG_USB_TUSB6010) || \
+ defined(CONFIG_USB_TUSB6010_MODULE)
+/*
+ * 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(TUSB6010_GPIO_ENABLE, 1);
+ msleep(1);
+
+ /* Wait until TUSB6010 pulls INT pin down */
+ i = 100;
+ while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
+ msleep(1);
+ i--;
+ }
+
+ if (!i) {
+ printk(KERN_ERR "tusb: powerup failed\n");
+ retval = -ENODEV;
+ }
+ } else {
+ gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
+ msleep(10);
+ }
+
+ return retval;
+}
+
+static struct musb_hdrc_config musb_config = {
+ .multipoint = 1,
+ .dyn_fifo = 1,
+ .num_eps = 16,
+ .ram_bits = 12,
+};
+
+static struct musb_hdrc_platform_data tusb_data = {
+#if defined(CONFIG_USB_MUSB_OTG)
+ .mode = MUSB_OTG,
+#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
+ .mode = MUSB_PERIPHERAL,
+#else /* defined(CONFIG_USB_MUSB_HOST) */
+ .mode = MUSB_HOST,
+#endif
+ .set_power = tusb_set_power,
+ .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
+ .power = 100, /* Max 100 mA VBUS for host mode */
+ .config = &musb_config,
+};
+
+static 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(TUSB6010_GPIO_ENABLE, "TUSB6010 enable");
+ if (ret != 0) {
+ printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
+ TUSB6010_GPIO_ENABLE);
+ return;
+ }
+ gpio_direction_output(TUSB6010_GPIO_ENABLE, 0);
+
+ tusb_set_power(0);
+
+ ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
+ TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
+ TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
+ if (ret != 0)
+ goto err;
+
+ printk(announce);
+
+ return;
+
+err:
+ gpio_free(TUSB6010_GPIO_ENABLE);
+}
+#else
+
+static void __init n8x0_usb_init(void) {}
+
+#endif /*CONFIG_USB_TUSB6010 */
+
+
static struct omap2_mcspi_device_config p54spi_mcspi_config = {
.turbo_mode = 0,
.single_channel = 1,
@@ -562,6 +659,7 @@ static void __init n8x0_init_machine(void)
n8x0_menelaus_init();
n8x0_onenand_init();
n8x0_mmc_init();
+ n8x0_usb_init();
}
MACHINE_START(NOKIA_N800, "Nokia N800")
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