[deliverable/linux.git] / arch / arm / mach-omap2 / usb-tusb6010.c

/*
 * 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);
}

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;
	dev_t.t_ce_rdyz = 7000;

	gpmc_calc_timings(&t, &tusb_sync, &dev_t);

	return gpmc_cs_set_timings(sync_cs, &t);
}

/* 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;
}
Commit	Line	Data
c1ed6407 DB	1	/*
	2	* linux/arch/arm/mach-omap2/usb-tusb6010.c
	3	*
	4	* Copyright (C) 2006 Nokia Corporation
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
012e3386	11	#include <linux/err.h>
d44b28c4	12	#include <linux/string.h>
c1ed6407 DB	13	#include <linux/types.h>
	14	#include <linux/errno.h>
	15	#include <linux/delay.h>
	16	#include <linux/platform_device.h>
f2d18fea	17	#include <linux/gpio.h>
dc28094b	18	#include <linux/export.h>
e8c4a7ac	19	#include <linux/platform_data/usb-omap.h>
c1ed6407 DB	20
	21	#include <linux/usb/musb.h>
	22
3ef5d007	23	#include "gpmc.h"
c1ed6407	24
f99bf16d	25	#include "mux.h"
c1ed6407 DB	26
	27	static u8 async_cs, sync_cs;
	28	static unsigned refclk_psec;
	29
c3be5b45	30	static struct gpmc_settings tusb_async = {
012e3386 JH	31	.wait_on_read = true,
	32	.wait_on_write = true,
	33	.device_width = GPMC_DEVWIDTH_16BIT,
c3be5b45 JH	34	.mux_add_data = GPMC_MUX_AD,
	35	};
	36
	37	static struct gpmc_settings tusb_sync = {
012e3386 JH	38	.burst_read = true,
012e3386 JH	39	.burst_write = true,
c3be5b45 JH	40	.sync_read = true,
c3be5b45 JH	41	.sync_write = true,
012e3386 JH	42	.wait_on_read = true,
	43	.wait_on_write = true,
	44	.burst_len = GPMC_BURST_16,
	45	.device_width = GPMC_DEVWIDTH_16BIT,
c3be5b45 JH	46	.mux_add_data = GPMC_MUX_AD,
c3be5b45 JH	47	};
c1ed6407	48
c1ed6407 DB	49	/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
c1ed6407 DB	50
47acde16	51	static int tusb_set_async_mode(unsigned sysclk_ps)
c1ed6407	52	{
47acde16	53	struct gpmc_device_timings dev_t;
c1ed6407 DB	54	struct gpmc_timings t;
c1ed6407 DB	55	unsigned t_acsnh_advnh = sysclk_ps + 3000;
c1ed6407	56
47acde16	57	memset(&dev_t, 0, sizeof(dev_t));
c1ed6407	58
47acde16 AM	59	dev_t.t_ceasu = 8 * 1000;
	60	dev_t.t_avdasu = t_acsnh_advnh - 7000;
	61	dev_t.t_ce_avd = 1000;
	62	dev_t.t_avdp_r = t_acsnh_advnh;
	63	dev_t.t_oeasu = t_acsnh_advnh + 1000;
	64	dev_t.t_oe = 300;
	65	dev_t.t_cez_r = 7000;
	66	dev_t.t_cez_w = dev_t.t_cez_r;
	67	dev_t.t_avdp_w = t_acsnh_advnh;
	68	dev_t.t_weasu = t_acsnh_advnh + 1000;
	69	dev_t.t_wpl = 300;
	70	dev_t.cyc_aavdh_we = 1;
c1ed6407	71
c3be5b45	72	gpmc_calc_timings(&t, &tusb_async, &dev_t);
c1ed6407 DB	73
	74	return gpmc_cs_set_timings(async_cs, &t);
	75	}
	76
47acde16	77	static int tusb_set_sync_mode(unsigned sysclk_ps)
c1ed6407	78	{
47acde16	79	struct gpmc_device_timings dev_t;
c1ed6407 DB	80	struct gpmc_timings t;
c1ed6407 DB	81	unsigned t_scsnh_advnh = sysclk_ps + 3000;
c1ed6407	82
47acde16 AM	83	memset(&dev_t, 0, sizeof(dev_t));
47acde16 AM	84
47acde16 AM	85	dev_t.clk = 11100;
	86	dev_t.t_bacc = 1000;
	87	dev_t.t_ces = 1000;
	88	dev_t.t_ceasu = 8 * 1000;
	89	dev_t.t_avdasu = t_scsnh_advnh - 7000;
	90	dev_t.t_ce_avd = 1000;
	91	dev_t.t_avdp_r = t_scsnh_advnh;
	92	dev_t.cyc_aavdh_oe = 3;
	93	dev_t.cyc_oe = 5;
	94	dev_t.t_ce_rdyz = 7000;
	95	dev_t.t_avdp_w = t_scsnh_advnh;
	96	dev_t.cyc_aavdh_we = 3;
	97	dev_t.cyc_wpl = 6;
	98	dev_t.t_ce_rdyz = 7000;
	99
c3be5b45	100	gpmc_calc_timings(&t, &tusb_sync, &dev_t);
559d94b0	101
c1ed6407 DB	102	return gpmc_cs_set_timings(sync_cs, &t);
	103	}
	104
c1ed6407 DB	105	/* tusb driver calls this when it changes the chip's clocking */
	106	int tusb6010_platform_retime(unsigned is_refclk)
	107	{
	108	static const char error[] =
	109	KERN_ERR "tusb6010 %s retime error %d\n";
	110
c1ed6407 DB	111	unsigned sysclk_ps;
	112	int status;
	113
47acde16	114	if (!refclk_psec)
c1ed6407 DB	115	return -ENODEV;
	116
	117	sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
	118
47acde16	119	status = tusb_set_async_mode(sysclk_ps);
c1ed6407 DB	120	if (status < 0) {
	121	printk(error, "async", status);
	122	goto done;
	123	}
47acde16	124	status = tusb_set_sync_mode(sysclk_ps);
c1ed6407 DB	125	if (status < 0)
	126	printk(error, "sync", status);
	127	done:
	128	return status;
	129	}
	130	EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
	131
	132	static struct resource tusb_resources[] = {
	133	/* Order is significant! The start/end fields
	134	* are updated during setup..
	135	*/
	136	{ /* Asynchronous access */
	137	.flags = IORESOURCE_MEM,
	138	},
	139	{ /* Synchronous access */
	140	.flags = IORESOURCE_MEM,
	141	},
	142	{ /* IRQ */
6ec1e077	143	.name = "mc",
c1ed6407 DB	144	.flags = IORESOURCE_IRQ,
	145	},
	146	};
	147
	148	static u64 tusb_dmamask = ~(u32)0;
	149
	150	static struct platform_device tusb_device = {
18688fbe	151	.name = "musb-tusb",
c1ed6407 DB	152	.id = -1,
	153	.dev = {
	154	.dma_mask = &tusb_dmamask,
	155	.coherent_dma_mask = 0xffffffff,
	156	},
	157	.num_resources = ARRAY_SIZE(tusb_resources),
	158	.resource = tusb_resources,
	159	};
	160
	161
	162	/* this may be called only from board-.c setup code /
	163	int __init
	164	tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
	165	unsigned ps_refclk, unsigned waitpin,
	166	unsigned async, unsigned sync,
	167	unsigned irq, unsigned dmachan)
	168	{
	169	int status;
	170	static char error[] __initdata =
	171	KERN_ERR "tusb6010 init error %d, %d\n";
	172
	173	/* ASYNC region, primarily for PIO */
	174	status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
	175	&tusb_resources[0].start);
	176	if (status < 0) {
	177	printk(error, 1, status);
	178	return status;
	179	}
	180	tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
012e3386	181	tusb_async.wait_pin = waitpin;
c1ed6407	182	async_cs = async;
c1ed6407	183
012e3386 JH	184	status = gpmc_cs_program_settings(async_cs, &tusb_async);
	185	if (status < 0)
	186	return status;
c1ed6407 DB	187
	188	/* SYNC region, primarily for DMA */
	189	status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
	190	&tusb_resources[1].start);
	191	if (status < 0) {
	192	printk(error, 2, status);
	193	return status;
	194	}
	195	tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
012e3386	196	tusb_sync.wait_pin = waitpin;
c1ed6407	197	sync_cs = sync;
012e3386 JH	198
	199	status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
	200	if (status < 0)
	201	return status;
c1ed6407 DB	202
c1ed6407 DB	203	/* IRQ */
bc593f5d	204	status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
c1ed6407 DB	205	if (status < 0) {
	206	printk(error, 3, status);
	207	return status;
	208	}
3d09b33f	209	tusb_resources[2].start = gpio_to_irq(irq);
c1ed6407 DB	210
	211	/* set up memory timings ... can speed them up later */
	212	if (!ps_refclk) {
	213	printk(error, 4, status);
	214	return -ENODEV;
	215	}
	216	refclk_psec = ps_refclk;
	217	status = tusb6010_platform_retime(1);
	218	if (status < 0) {
	219	printk(error, 5, status);
	220	return status;
	221	}
	222
	223	/* finish device setup ... */
	224	if (!data) {
	225	printk(error, 6, status);
	226	return -ENODEV;
	227	}
c1ed6407 DB	228	tusb_device.dev.platform_data = data;
	229
	230	/* REVISIT let the driver know what DMA channels work */
	231	if (!dmachan)
	232	tusb_device.dev.dma_mask = NULL;
	233	else {
	234	/* assume OMAP 2420 ES2.0 and later */
	235	if (dmachan & (1 << 0))
f99bf16d	236	omap_mux_init_signal("sys_ndmareq0", 0);
c1ed6407	237	if (dmachan & (1 << 1))
f99bf16d	238	omap_mux_init_signal("sys_ndmareq1", 0);
c1ed6407	239	if (dmachan & (1 << 2))
f99bf16d	240	omap_mux_init_signal("sys_ndmareq2", 0);
c1ed6407	241	if (dmachan & (1 << 3))
f99bf16d	242	omap_mux_init_signal("sys_ndmareq3", 0);
c1ed6407	243	if (dmachan & (1 << 4))
f99bf16d	244	omap_mux_init_signal("sys_ndmareq4", 0);
c1ed6407	245	if (dmachan & (1 << 5))
f99bf16d	246	omap_mux_init_signal("sys_ndmareq5", 0);
c1ed6407 DB	247	}
	248
	249	/* so far so good ... register the device */
	250	status = platform_device_register(&tusb_device);
	251	if (status < 0) {
	252	printk(error, 7, status);
	253	return status;
	254	}
	255	return 0;
	256	}