Initial import

1 files changed, 255 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/usb-tusb6010.c b/arch/arm/mach-omap2/usb-tusb6010.c
new file mode 100644
index 000000000..e554d9e66
--- /dev/null
+++ b/arch/arm/mach-omap2/usb-tusb6010.c
@@ -0,0 +1,255 @@
+/*
+ * linux/arch/arm/mach-omap2/usb-tusb6010.c
+ *
+ * Copyright (C) 2006 Nokia Corporation
+ *
+ * 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/err.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/export.h>
+#include <linux/platform_data/usb-omap.h>
+
+#include <linux/usb/musb.h>
+
+#include "gpmc.h"
+
+#include "mux.h"
+
+static u8		async_cs, sync_cs;
+static unsigned		refclk_psec;
+
+static struct gpmc_settings tusb_async = {
+	.wait_on_read	= true,
+	.wait_on_write	= true,
+	.device_width	= GPMC_DEVWIDTH_16BIT,
+	.mux_add_data	= GPMC_MUX_AD,
+};
+
+static struct gpmc_settings tusb_sync = {
+	.burst_read	= true,
+	.burst_write	= true,
+	.sync_read	= true,
+	.sync_write	= true,
+	.wait_on_read	= true,
+	.wait_on_write	= true,
+	.burst_len	= GPMC_BURST_16,
+	.device_width	= GPMC_DEVWIDTH_16BIT,
+	.mux_add_data	= GPMC_MUX_AD,
+};
+
+/* NOTE:  timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
+
+static int tusb_set_async_mode(unsigned sysclk_ps)
+{
+	struct gpmc_device_timings dev_t;
+	struct gpmc_timings	t;
+	unsigned		t_acsnh_advnh = sysclk_ps + 3000;
+
+	memset(&dev_t, 0, sizeof(dev_t));
+
+	dev_t.t_ceasu = 8 * 1000;
+	dev_t.t_avdasu = t_acsnh_advnh - 7000;
+	dev_t.t_ce_avd = 1000;
+	dev_t.t_avdp_r = t_acsnh_advnh;
+	dev_t.t_oeasu = t_acsnh_advnh + 1000;
+	dev_t.t_oe = 300;
+	dev_t.t_cez_r = 7000;
+	dev_t.t_cez_w = dev_t.t_cez_r;
+	dev_t.t_avdp_w = t_acsnh_advnh;
+	dev_t.t_weasu = t_acsnh_advnh + 1000;
+	dev_t.t_wpl = 300;
+	dev_t.cyc_aavdh_we = 1;
+
+	gpmc_calc_timings(&t, &tusb_async, &dev_t);
+
+	return gpmc_cs_set_timings(async_cs, &t, &tusb_async);
+}
+
+static int tusb_set_sync_mode(unsigned sysclk_ps)
+{
+	struct gpmc_device_timings dev_t;
+	struct gpmc_timings	t;
+	unsigned		t_scsnh_advnh = sysclk_ps + 3000;
+
+	memset(&dev_t, 0, sizeof(dev_t));
+
+	dev_t.clk = 11100;
+	dev_t.t_bacc = 1000;
+	dev_t.t_ces = 1000;
+	dev_t.t_ceasu = 8 * 1000;
+	dev_t.t_avdasu = t_scsnh_advnh - 7000;
+	dev_t.t_ce_avd = 1000;
+	dev_t.t_avdp_r = t_scsnh_advnh;
+	dev_t.cyc_aavdh_oe = 3;
+	dev_t.cyc_oe = 5;
+	dev_t.t_ce_rdyz = 7000;
+	dev_t.t_avdp_w = t_scsnh_advnh;
+	dev_t.cyc_aavdh_we = 3;
+	dev_t.cyc_wpl = 6;
+
+	gpmc_calc_timings(&t, &tusb_sync, &dev_t);
+
+	return gpmc_cs_set_timings(sync_cs, &t, &tusb_sync);
+}
+
+/* tusb driver calls this when it changes the chip's clocking */
+int tusb6010_platform_retime(unsigned is_refclk)
+{
+	static const char	error[] =
+		KERN_ERR "tusb6010 %s retime error %d\n";
+
+	unsigned	sysclk_ps;
+	int		status;
+
+	if (!refclk_psec)
+		return -ENODEV;
+
+	sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
+
+	status = tusb_set_async_mode(sysclk_ps);
+	if (status < 0) {
+		printk(error, "async", status);
+		goto done;
+	}
+	status = tusb_set_sync_mode(sysclk_ps);
+	if (status < 0)
+		printk(error, "sync", status);
+done:
+	return status;
+}
+EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
+
+static struct resource tusb_resources[] = {
+	/* Order is significant!  The start/end fields
+	 * are updated during setup..
+	 */
+	{ /* Asynchronous access */
+		.flags	= IORESOURCE_MEM,
+	},
+	{ /* Synchronous access */
+		.flags	= IORESOURCE_MEM,
+	},
+	{ /* IRQ */
+		.name	= "mc",
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static u64 tusb_dmamask = ~(u32)0;
+
+static struct platform_device tusb_device = {
+	.name		= "musb-tusb",
+	.id		= -1,
+	.dev = {
+		.dma_mask		= &tusb_dmamask,
+		.coherent_dma_mask	= 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(tusb_resources),
+	.resource	= tusb_resources,
+};
+
+
+/* this may be called only from board-*.c setup code */
+int __init
+tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
+		unsigned ps_refclk, unsigned waitpin,
+		unsigned async, unsigned sync,
+		unsigned irq, unsigned dmachan)
+{
+	int		status;
+	static char	error[] __initdata =
+		KERN_ERR "tusb6010 init error %d, %d\n";
+
+	/* ASYNC region, primarily for PIO */
+	status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
+				&tusb_resources[0].start);
+	if (status < 0) {
+		printk(error, 1, status);
+		return status;
+	}
+	tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
+	tusb_async.wait_pin = waitpin;
+	async_cs = async;
+
+	status = gpmc_cs_program_settings(async_cs, &tusb_async);
+	if (status < 0)
+		return status;
+
+	/* SYNC region, primarily for DMA */
+	status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
+				&tusb_resources[1].start);
+	if (status < 0) {
+		printk(error, 2, status);
+		return status;
+	}
+	tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
+	tusb_sync.wait_pin = waitpin;
+	sync_cs = sync;
+
+	status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
+	if (status < 0)
+		return status;
+
+	/* IRQ */
+	status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
+	if (status < 0) {
+		printk(error, 3, status);
+		return status;
+	}
+	tusb_resources[2].start = gpio_to_irq(irq);
+
+	/* set up memory timings ... can speed them up later */
+	if (!ps_refclk) {
+		printk(error, 4, status);
+		return -ENODEV;
+	}
+	refclk_psec = ps_refclk;
+	status = tusb6010_platform_retime(1);
+	if (status < 0) {
+		printk(error, 5, status);
+		return status;
+	}
+
+	/* finish device setup ... */
+	if (!data) {
+		printk(error, 6, status);
+		return -ENODEV;
+	}
+	tusb_device.dev.platform_data = data;
+
+	/* REVISIT let the driver know what DMA channels work */
+	if (!dmachan)
+		tusb_device.dev.dma_mask = NULL;
+	else {
+		/* assume OMAP 2420 ES2.0 and later */
+		if (dmachan & (1 << 0))
+			omap_mux_init_signal("sys_ndmareq0", 0);
+		if (dmachan & (1 << 1))
+			omap_mux_init_signal("sys_ndmareq1", 0);
+		if (dmachan & (1 << 2))
+			omap_mux_init_signal("sys_ndmareq2", 0);
+		if (dmachan & (1 << 3))
+			omap_mux_init_signal("sys_ndmareq3", 0);
+		if (dmachan & (1 << 4))
+			omap_mux_init_signal("sys_ndmareq4", 0);
+		if (dmachan & (1 << 5))
+			omap_mux_init_signal("sys_ndmareq5", 0);
+	}
+
+	/* so far so good ... register the device */
+	status = platform_device_register(&tusb_device);
+	if (status < 0) {
+		printk(error, 7, status);
+		return status;
+	}
+	return 0;
+}