[deliverable/linux.git] / drivers / usb / musb / blackfin.c

/*
 * MUSB OTG controller driver for Blackfin Processors
 *
 * Copyright 2006-2008 Analog Devices Inc.
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/gpio.h>
#include <linux/io.h>

#include <asm/cacheflush.h>

#include "musb_core.h"
#include "blackfin.h"

/*
 * Load an endpoint's FIFO
 */
void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
{
	void __iomem *fifo = hw_ep->fifo;
	void __iomem *epio = hw_ep->regs;
	u8 epnum = hw_ep->epnum;

	prefetch((u8 *)src);

	musb_writew(epio, MUSB_TXCOUNT, len);

	DBG(4, "TX ep%d fifo %p count %d buf %p, epio %p\n",
			hw_ep->epnum, fifo, len, src, epio);

	dump_fifo_data(src, len);

	if (!ANOMALY_05000380 && epnum != 0) {
		u16 dma_reg;

		flush_dcache_range((unsigned long)src,
			(unsigned long)(src + len));

		/* Setup DMA address register */
		dma_reg = (u32)src;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_LOW), dma_reg);
		SSYNC();

		dma_reg = (u32)src >> 16;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_HIGH), dma_reg);
		SSYNC();

		/* Setup DMA count register */
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_LOW), len);
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_HIGH), 0);
		SSYNC();

		/* Enable the DMA */
		dma_reg = (epnum << 4) | DMA_ENA | INT_ENA | DIRECTION;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), dma_reg);
		SSYNC();

		/* Wait for compelete */
		while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << epnum)))
			cpu_relax();

		/* acknowledge dma interrupt */
		bfin_write_USB_DMA_INTERRUPT(1 << epnum);
		SSYNC();

		/* Reset DMA */
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), 0);
		SSYNC();
	} else {
		SSYNC();

		if (unlikely((unsigned long)src & 0x01))
			outsw_8((unsigned long)fifo, src, (len + 1) >> 1);
		else
			outsw((unsigned long)fifo, src, (len + 1) >> 1);
	}
}
/*
 * Unload an endpoint's FIFO
 */
void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
{
	void __iomem *fifo = hw_ep->fifo;
	u8 epnum = hw_ep->epnum;

	if (ANOMALY_05000467 && epnum != 0) {
		u16 dma_reg;

		invalidate_dcache_range((unsigned long)dst,
			(unsigned long)(dst + len));

		/* Setup DMA address register */
		dma_reg = (u32)dst;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_LOW), dma_reg);
		SSYNC();

		dma_reg = (u32)dst >> 16;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_HIGH), dma_reg);
		SSYNC();

		/* Setup DMA count register */
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_LOW), len);
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_HIGH), 0);
		SSYNC();

		/* Enable the DMA */
		dma_reg = (epnum << 4) | DMA_ENA | INT_ENA;
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), dma_reg);
		SSYNC();

		/* Wait for compelete */
		while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << epnum)))
			cpu_relax();

		/* acknowledge dma interrupt */
		bfin_write_USB_DMA_INTERRUPT(1 << epnum);
		SSYNC();

		/* Reset DMA */
		bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), 0);
		SSYNC();
	} else {
		SSYNC();
		/* Read the last byte of packet with odd size from address fifo + 4
		 * to trigger 1 byte access to EP0 FIFO.
		 */
		if (len == 1)
			*dst = (u8)inw((unsigned long)fifo + 4);
		else {
			if (unlikely((unsigned long)dst & 0x01))
				insw_8((unsigned long)fifo, dst, len >> 1);
			else
				insw((unsigned long)fifo, dst, len >> 1);

			if (len & 0x01)
				*(dst + len - 1) = (u8)inw((unsigned long)fifo + 4);
		}
	}
	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
			'R', hw_ep->epnum, fifo, len, dst);

	dump_fifo_data(dst, len);
}

static irqreturn_t blackfin_interrupt(int irq, void *__hci)
{
	unsigned long	flags;
	irqreturn_t	retval = IRQ_NONE;
	struct musb	*musb = __hci;

	spin_lock_irqsave(&musb->lock, flags);

	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);

	if (musb->int_usb || musb->int_tx || musb->int_rx) {
		musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
		musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
		musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
		retval = musb_interrupt(musb);
	}

	/* Start sampling ID pin, when plug is removed from MUSB */
	if ((is_otg_enabled(musb) && (musb->xceiv->state == OTG_STATE_B_IDLE
		|| musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) ||
		(musb->int_usb & MUSB_INTR_DISCONNECT && is_host_active(musb))) {
		mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
		musb->a_wait_bcon = TIMER_DELAY;
	}

	spin_unlock_irqrestore(&musb->lock, flags);

	return retval;
}

static void musb_conn_timer_handler(unsigned long _musb)
{
	struct musb *musb = (void *)_musb;
	unsigned long flags;
	u16 val;
	static u8 toggle;

	spin_lock_irqsave(&musb->lock, flags);
	switch (musb->xceiv->state) {
	case OTG_STATE_A_IDLE:
	case OTG_STATE_A_WAIT_BCON:
		/* Start a new session */
		val = musb_readw(musb->mregs, MUSB_DEVCTL);
		val &= ~MUSB_DEVCTL_SESSION;
		musb_writew(musb->mregs, MUSB_DEVCTL, val);
		val |= MUSB_DEVCTL_SESSION;
		musb_writew(musb->mregs, MUSB_DEVCTL, val);
		/* Check if musb is host or peripheral. */
		val = musb_readw(musb->mregs, MUSB_DEVCTL);

		if (!(val & MUSB_DEVCTL_BDEVICE)) {
			gpio_set_value(musb->config->gpio_vrsel, 1);
			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
		} else {
			gpio_set_value(musb->config->gpio_vrsel, 0);
			/* Ignore VBUSERROR and SUSPEND IRQ */
			val = musb_readb(musb->mregs, MUSB_INTRUSBE);
			val &= ~MUSB_INTR_VBUSERROR;
			musb_writeb(musb->mregs, MUSB_INTRUSBE, val);

			val = MUSB_INTR_SUSPEND | MUSB_INTR_VBUSERROR;
			musb_writeb(musb->mregs, MUSB_INTRUSB, val);
			if (is_otg_enabled(musb))
				musb->xceiv->state = OTG_STATE_B_IDLE;
			else
				musb_writeb(musb->mregs, MUSB_POWER, MUSB_POWER_HSENAB);
		}
		mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
		break;
	case OTG_STATE_B_IDLE:

		if (!is_peripheral_enabled(musb))
			break;
		/* Start a new session.  It seems that MUSB needs taking
		 * some time to recognize the type of the plug inserted?
		 */
		val = musb_readw(musb->mregs, MUSB_DEVCTL);
		val |= MUSB_DEVCTL_SESSION;
		musb_writew(musb->mregs, MUSB_DEVCTL, val);
		val = musb_readw(musb->mregs, MUSB_DEVCTL);

		if (!(val & MUSB_DEVCTL_BDEVICE)) {
			gpio_set_value(musb->config->gpio_vrsel, 1);
			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
		} else {
			gpio_set_value(musb->config->gpio_vrsel, 0);

			/* Ignore VBUSERROR and SUSPEND IRQ */
			val = musb_readb(musb->mregs, MUSB_INTRUSBE);
			val &= ~MUSB_INTR_VBUSERROR;
			musb_writeb(musb->mregs, MUSB_INTRUSBE, val);

			val = MUSB_INTR_SUSPEND | MUSB_INTR_VBUSERROR;
			musb_writeb(musb->mregs, MUSB_INTRUSB, val);

			/* Toggle the Soft Conn bit, so that we can response to
			 * the inserting of either A-plug or B-plug.
			 */
			if (toggle) {
				val = musb_readb(musb->mregs, MUSB_POWER);
				val &= ~MUSB_POWER_SOFTCONN;
				musb_writeb(musb->mregs, MUSB_POWER, val);
				toggle = 0;
			} else {
				val = musb_readb(musb->mregs, MUSB_POWER);
				val |= MUSB_POWER_SOFTCONN;
				musb_writeb(musb->mregs, MUSB_POWER, val);
				toggle = 1;
			}
			/* The delay time is set to 1/4 second by default,
			 * shortening it, if accelerating A-plug detection
			 * is needed in OTG mode.
			 */
			mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY / 4);
		}
		break;
	default:
		DBG(1, "%s state not handled\n", otg_state_string(musb));
		break;
	}
	spin_unlock_irqrestore(&musb->lock, flags);

	DBG(4, "state is %s\n", otg_state_string(musb));
}

void musb_platform_enable(struct musb *musb)
{
	if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
		mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
		musb->a_wait_bcon = TIMER_DELAY;
	}
}

void musb_platform_disable(struct musb *musb)
{
}

static void bfin_set_vbus(struct musb *musb, int is_on)
{
	int value = musb->config->gpio_vrsel_active;
	if (!is_on)
		value = !value;
	gpio_set_value(musb->config->gpio_vrsel, value);

	DBG(1, "VBUS %s, devctl %02x "
		/* otg %3x conf %08x prcm %08x */ "\n",
		otg_state_string(musb),
		musb_readb(musb->mregs, MUSB_DEVCTL));
}

static int bfin_set_power(struct otg_transceiver *x, unsigned mA)
{
	return 0;
}

void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
{
	if (!is_otg_enabled(musb) && is_host_enabled(musb))
		mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
}

int musb_platform_get_vbus_status(struct musb *musb)
{
	return 0;
}

int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
{
	return -EIO;
}

static void musb_platform_reg_init(struct musb *musb)
{
	if (ANOMALY_05000346) {
		bfin_write_USB_APHY_CALIB(ANOMALY_05000346_value);
		SSYNC();
	}

	if (ANOMALY_05000347) {
		bfin_write_USB_APHY_CNTRL(0x0);
		SSYNC();
	}

	/* Configure PLL oscillator register */
	bfin_write_USB_PLLOSC_CTRL(0x30a8);
	SSYNC();

	bfin_write_USB_SRP_CLKDIV((get_sclk()/1000) / 32 - 1);
	SSYNC();

	bfin_write_USB_EP_NI0_RXMAXP(64);
	SSYNC();

	bfin_write_USB_EP_NI0_TXMAXP(64);
	SSYNC();

	/* Route INTRUSB/INTR_RX/INTR_TX to USB_INT0*/
	bfin_write_USB_GLOBINTR(0x7);
	SSYNC();

	bfin_write_USB_GLOBAL_CTL(GLOBAL_ENA | EP1_TX_ENA | EP2_TX_ENA |
				EP3_TX_ENA | EP4_TX_ENA | EP5_TX_ENA |
				EP6_TX_ENA | EP7_TX_ENA | EP1_RX_ENA |
				EP2_RX_ENA | EP3_RX_ENA | EP4_RX_ENA |
				EP5_RX_ENA | EP6_RX_ENA | EP7_RX_ENA);
	SSYNC();
}

int __init musb_platform_init(struct musb *musb, void *board_data)
{

	/*
	 * Rev 1.0 BF549 EZ-KITs require PE7 to be high for both DEVICE
	 * and OTG HOST modes, while rev 1.1 and greater require PE7 to
	 * be low for DEVICE mode and high for HOST mode. We set it high
	 * here because we are in host mode
	 */

	if (gpio_request(musb->config->gpio_vrsel, "USB_VRSEL")) {
		printk(KERN_ERR "Failed ro request USB_VRSEL GPIO_%d\n",
			musb->config->gpio_vrsel);
		return -ENODEV;
	}
	gpio_direction_output(musb->config->gpio_vrsel, 0);

	usb_nop_xceiv_register();
	musb->xceiv = otg_get_transceiver();
	if (!musb->xceiv) {
		gpio_free(musb->config->gpio_vrsel);
		return -ENODEV;
	}

	musb_platform_reg_init(musb);

	if (is_host_enabled(musb)) {
		musb->board_set_vbus = bfin_set_vbus;
		setup_timer(&musb_conn_timer,
			musb_conn_timer_handler, (unsigned long) musb);
	}
	if (is_peripheral_enabled(musb))
		musb->xceiv->set_power = bfin_set_power;

	musb->isr = blackfin_interrupt;

	return 0;
}

#ifdef CONFIG_PM
void musb_platform_save_context(struct musb *musb,
			struct musb_context_registers *musb_context)
{
	if (is_host_active(musb))
		/*
		 * During hibernate gpio_vrsel will change from high to low
		 * low which will generate wakeup event resume the system
		 * immediately.  Set it to 0 before hibernate to avoid this
		 * wakeup event.
		 */
		gpio_set_value(musb->config->gpio_vrsel, 0);
}

void musb_platform_restore_context(struct musb *musb,
			struct musb_context_registers *musb_context)
{
	musb_platform_reg_init(musb);
}
#endif

int musb_platform_exit(struct musb *musb)
{
	gpio_free(musb->config->gpio_vrsel);

	otg_put_transceiver(musb->xceiv);
	usb_nop_xceiv_unregister();
	return 0;
}
Commit	Line	Data
0c6a8818 BW	1	/*
	2	* MUSB OTG controller driver for Blackfin Processors
	3	*
	4	* Copyright 2006-2008 Analog Devices Inc.
	5	*
	6	* Enter bugs at http://blackfin.uclinux.org/
	7	*
	8	* Licensed under the GPL-2 or later.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/kernel.h>
	13	#include <linux/sched.h>
0c6a8818 BW	14	#include <linux/init.h>
0c6a8818 BW	15	#include <linux/list.h>
0c6a8818 BW	16	#include <linux/gpio.h>
	17	#include <linux/io.h>
	18
	19	#include <asm/cacheflush.h>
	20
	21	#include "musb_core.h"
	22	#include "blackfin.h"
	23
	24	/*
	25	* Load an endpoint's FIFO
	26	*/
	27	void musb_write_fifo(struct musb_hw_ep hw_ep, u16 len, const u8 src)
	28	{
	29	void __iomem *fifo = hw_ep->fifo;
	30	void __iomem *epio = hw_ep->regs;
1c4bdc01	31	u8 epnum = hw_ep->epnum;
0c6a8818 BW	32
	33	prefetch((u8 *)src);
	34
	35	musb_writew(epio, MUSB_TXCOUNT, len);
	36
	37	DBG(4, "TX ep%d fifo %p count %d buf %p, epio %p\n",
	38	hw_ep->epnum, fifo, len, src, epio);
	39
	40	dump_fifo_data(src, len);
	41
1c4bdc01	42	if (!ANOMALY_05000380 && epnum != 0) {
1ca9e9ca BW	43	u16 dma_reg;
	44
	45	flush_dcache_range((unsigned long)src,
	46	(unsigned long)(src + len));
1c4bdc01 BW	47
1c4bdc01 BW	48	/* Setup DMA address register */
1ca9e9ca	49	dma_reg = (u32)src;
1c4bdc01 BW	50	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_LOW), dma_reg);
	51	SSYNC();
	52
1ca9e9ca	53	dma_reg = (u32)src >> 16;
1c4bdc01 BW	54	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_HIGH), dma_reg);
	55	SSYNC();
	56
	57	/* Setup DMA count register */
	58	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_LOW), len);
	59	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_HIGH), 0);
	60	SSYNC();
	61
	62	/* Enable the DMA */
	63	dma_reg = (epnum << 4) \| DMA_ENA \| INT_ENA \| DIRECTION;
	64	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), dma_reg);
	65	SSYNC();
	66
	67	/* Wait for compelete */
	68	while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << epnum)))
	69	cpu_relax();
	70
	71	/* acknowledge dma interrupt */
	72	bfin_write_USB_DMA_INTERRUPT(1 << epnum);
	73	SSYNC();
	74
	75	/* Reset DMA */
	76	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), 0);
	77	SSYNC();
	78	} else {
	79	SSYNC();
	80
	81	if (unlikely((unsigned long)src & 0x01))
1ca9e9ca	82	outsw_8((unsigned long)fifo, src, (len + 1) >> 1);
1c4bdc01	83	else
1ca9e9ca	84	outsw((unsigned long)fifo, src, (len + 1) >> 1);
1c4bdc01	85	}
0c6a8818	86	}
0c6a8818 BW	87	/*
	88	* Unload an endpoint's FIFO
	89	*/
	90	void musb_read_fifo(struct musb_hw_ep hw_ep, u16 len, u8 dst)
	91	{
	92	void __iomem *fifo = hw_ep->fifo;
	93	u8 epnum = hw_ep->epnum;
0c6a8818	94
1c4bdc01	95	if (ANOMALY_05000467 && epnum != 0) {
1ca9e9ca	96	u16 dma_reg;
1c4bdc01	97
1ca9e9ca BW	98	invalidate_dcache_range((unsigned long)dst,
1ca9e9ca BW	99	(unsigned long)(dst + len));
1c4bdc01 BW	100
1c4bdc01 BW	101	/* Setup DMA address register */
1ca9e9ca	102	dma_reg = (u32)dst;
1c4bdc01 BW	103	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_LOW), dma_reg);
	104	SSYNC();
	105
1ca9e9ca	106	dma_reg = (u32)dst >> 16;
1c4bdc01 BW	107	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_HIGH), dma_reg);
	108	SSYNC();
	109
	110	/* Setup DMA count register */
	111	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_LOW), len);
	112	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_HIGH), 0);
	113	SSYNC();
	114
	115	/* Enable the DMA */
	116	dma_reg = (epnum << 4) \| DMA_ENA \| INT_ENA;
	117	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), dma_reg);
	118	SSYNC();
	119
	120	/* Wait for compelete */
	121	while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << epnum)))
	122	cpu_relax();
	123
	124	/* acknowledge dma interrupt */
	125	bfin_write_USB_DMA_INTERRUPT(1 << epnum);
	126	SSYNC();
	127
	128	/* Reset DMA */
	129	bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), 0);
	130	SSYNC();
	131	} else {
	132	SSYNC();
	133	/* Read the last byte of packet with odd size from address fifo + 4
	134	* to trigger 1 byte access to EP0 FIFO.
	135	*/
	136	if (len == 1)
	137	*dst = (u8)inw((unsigned long)fifo + 4);
	138	else {
	139	if (unlikely((unsigned long)dst & 0x01))
	140	insw_8((unsigned long)fifo, dst, len >> 1);
	141	else
	142	insw((unsigned long)fifo, dst, len >> 1);
	143
	144	if (len & 0x01)
	145	*(dst + len - 1) = (u8)inw((unsigned long)fifo + 4);
	146	}
	147	}
04f4086f MF	148	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
	149	'R', hw_ep->epnum, fifo, len, dst);
	150
0c6a8818 BW	151	dump_fifo_data(dst, len);
	152	}
	153
	154	static irqreturn_t blackfin_interrupt(int irq, void *__hci)
	155	{
	156	unsigned long flags;
	157	irqreturn_t retval = IRQ_NONE;
	158	struct musb *musb = __hci;
	159
	160	spin_lock_irqsave(&musb->lock, flags);
	161
	162	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	163	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	164	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
	165
	166	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx) {
	167	musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
	168	musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
	169	musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
	170	retval = musb_interrupt(musb);
	171	}
	172
ff927add	173	/* Start sampling ID pin, when plug is removed from MUSB */
68f64714 BL	174	if ((is_otg_enabled(musb) && (musb->xceiv->state == OTG_STATE_B_IDLE
	175	\|\| musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) \|\|
	176	(musb->int_usb & MUSB_INTR_DISCONNECT && is_host_active(musb))) {
ff927add CC	177	mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
	178	musb->a_wait_bcon = TIMER_DELAY;
	179	}
	180
0c6a8818 BW	181	spin_unlock_irqrestore(&musb->lock, flags);
0c6a8818 BW	182
2f831751	183	return retval;
0c6a8818 BW	184	}
	185
	186	static void musb_conn_timer_handler(unsigned long _musb)
	187	{
	188	struct musb musb = (void )_musb;
	189	unsigned long flags;
	190	u16 val;
ff927add	191	static u8 toggle;
0c6a8818 BW	192
0c6a8818 BW	193	spin_lock_irqsave(&musb->lock, flags);
84e250ff	194	switch (musb->xceiv->state) {
0c6a8818 BW	195	case OTG_STATE_A_IDLE:
	196	case OTG_STATE_A_WAIT_BCON:
	197	/* Start a new session */
	198	val = musb_readw(musb->mregs, MUSB_DEVCTL);
ff927add CC	199	val &= ~MUSB_DEVCTL_SESSION;
ff927add CC	200	musb_writew(musb->mregs, MUSB_DEVCTL, val);
0c6a8818 BW	201	val \|= MUSB_DEVCTL_SESSION;
0c6a8818 BW	202	musb_writew(musb->mregs, MUSB_DEVCTL, val);
ff927add CC	203	/* Check if musb is host or peripheral. */
	204	val = musb_readw(musb->mregs, MUSB_DEVCTL);
	205
	206	if (!(val & MUSB_DEVCTL_BDEVICE)) {
	207	gpio_set_value(musb->config->gpio_vrsel, 1);
	208	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
	209	} else {
	210	gpio_set_value(musb->config->gpio_vrsel, 0);
	211	/* Ignore VBUSERROR and SUSPEND IRQ */
	212	val = musb_readb(musb->mregs, MUSB_INTRUSBE);
	213	val &= ~MUSB_INTR_VBUSERROR;
	214	musb_writeb(musb->mregs, MUSB_INTRUSBE, val);
	215
	216	val = MUSB_INTR_SUSPEND \| MUSB_INTR_VBUSERROR;
	217	musb_writeb(musb->mregs, MUSB_INTRUSB, val);
	218	if (is_otg_enabled(musb))
	219	musb->xceiv->state = OTG_STATE_B_IDLE;
	220	else
	221	musb_writeb(musb->mregs, MUSB_POWER, MUSB_POWER_HSENAB);
	222	}
	223	mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
	224	break;
	225	case OTG_STATE_B_IDLE:
0c6a8818	226
ff927add CC	227	if (!is_peripheral_enabled(musb))
	228	break;
	229	/* Start a new session. It seems that MUSB needs taking
	230	* some time to recognize the type of the plug inserted?
	231	*/
	232	val = musb_readw(musb->mregs, MUSB_DEVCTL);
	233	val \|= MUSB_DEVCTL_SESSION;
	234	musb_writew(musb->mregs, MUSB_DEVCTL, val);
0c6a8818	235	val = musb_readw(musb->mregs, MUSB_DEVCTL);
ff927add	236
0c6a8818 BW	237	if (!(val & MUSB_DEVCTL_BDEVICE)) {
0c6a8818 BW	238	gpio_set_value(musb->config->gpio_vrsel, 1);
84e250ff	239	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
0c6a8818 BW	240	} else {
	241	gpio_set_value(musb->config->gpio_vrsel, 0);
	242
	243	/* Ignore VBUSERROR and SUSPEND IRQ */
	244	val = musb_readb(musb->mregs, MUSB_INTRUSBE);
	245	val &= ~MUSB_INTR_VBUSERROR;
	246	musb_writeb(musb->mregs, MUSB_INTRUSBE, val);
	247
	248	val = MUSB_INTR_SUSPEND \| MUSB_INTR_VBUSERROR;
	249	musb_writeb(musb->mregs, MUSB_INTRUSB, val);
	250
ff927add CC	251	/* Toggle the Soft Conn bit, so that we can response to
	252	* the inserting of either A-plug or B-plug.
	253	*/
	254	if (toggle) {
	255	val = musb_readb(musb->mregs, MUSB_POWER);
	256	val &= ~MUSB_POWER_SOFTCONN;
	257	musb_writeb(musb->mregs, MUSB_POWER, val);
	258	toggle = 0;
	259	} else {
	260	val = musb_readb(musb->mregs, MUSB_POWER);
	261	val \|= MUSB_POWER_SOFTCONN;
	262	musb_writeb(musb->mregs, MUSB_POWER, val);
	263	toggle = 1;
	264	}
	265	/* The delay time is set to 1/4 second by default,
	266	* shortening it, if accelerating A-plug detection
	267	* is needed in OTG mode.
	268	*/
	269	mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY / 4);
0c6a8818	270	}
0c6a8818	271	break;
0c6a8818 BW	272	default:
	273	DBG(1, "%s state not handled\n", otg_state_string(musb));
	274	break;
	275	}
	276	spin_unlock_irqrestore(&musb->lock, flags);
	277
	278	DBG(4, "state is %s\n", otg_state_string(musb));
	279	}
	280
	281	void musb_platform_enable(struct musb *musb)
	282	{
ff927add	283	if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
0c6a8818 BW	284	mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
	285	musb->a_wait_bcon = TIMER_DELAY;
	286	}
	287	}
	288
	289	void musb_platform_disable(struct musb *musb)
	290	{
	291	}
	292
0c6a8818 BW	293	static void bfin_set_vbus(struct musb *musb, int is_on)
0c6a8818 BW	294	{
6ddc6dae CC	295	int value = musb->config->gpio_vrsel_active;
	296	if (!is_on)
	297	value = !value;
	298	gpio_set_value(musb->config->gpio_vrsel, value);
0c6a8818 BW	299
	300	DBG(1, "VBUS %s, devctl %02x "
	301	/* otg %3x conf %08x prcm %08x */ "\n",
	302	otg_state_string(musb),
	303	musb_readb(musb->mregs, MUSB_DEVCTL));
	304	}
	305
	306	static int bfin_set_power(struct otg_transceiver *x, unsigned mA)
	307	{
	308	return 0;
	309	}
	310
	311	void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
	312	{
ff927add	313	if (!is_otg_enabled(musb) && is_host_enabled(musb))
0c6a8818 BW	314	mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
	315	}
	316
	317	int musb_platform_get_vbus_status(struct musb *musb)
	318	{
	319	return 0;
	320	}
	321
2002e768	322	int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
0c6a8818	323	{
2002e768	324	return -EIO;
0c6a8818 BW	325	}
0c6a8818 BW	326
1e393c6e	327	static void musb_platform_reg_init(struct musb *musb)
0c6a8818	328	{
d426e60d RG	329	if (ANOMALY_05000346) {
	330	bfin_write_USB_APHY_CALIB(ANOMALY_05000346_value);
	331	SSYNC();
	332	}
0c6a8818	333
d426e60d RG	334	if (ANOMALY_05000347) {
	335	bfin_write_USB_APHY_CNTRL(0x0);
	336	SSYNC();
	337	}
0c6a8818	338
0c6a8818 BW	339	/* Configure PLL oscillator register */
	340	bfin_write_USB_PLLOSC_CTRL(0x30a8);
	341	SSYNC();
	342
	343	bfin_write_USB_SRP_CLKDIV((get_sclk()/1000) / 32 - 1);
	344	SSYNC();
	345
	346	bfin_write_USB_EP_NI0_RXMAXP(64);
	347	SSYNC();
	348
	349	bfin_write_USB_EP_NI0_TXMAXP(64);
	350	SSYNC();
	351
	352	/* Route INTRUSB/INTR_RX/INTR_TX to USB_INT0*/
	353	bfin_write_USB_GLOBINTR(0x7);
	354	SSYNC();
	355
	356	bfin_write_USB_GLOBAL_CTL(GLOBAL_ENA \| EP1_TX_ENA \| EP2_TX_ENA \|
	357	EP3_TX_ENA \| EP4_TX_ENA \| EP5_TX_ENA \|
	358	EP6_TX_ENA \| EP7_TX_ENA \| EP1_RX_ENA \|
	359	EP2_RX_ENA \| EP3_RX_ENA \| EP4_RX_ENA \|
	360	EP5_RX_ENA \| EP6_RX_ENA \| EP7_RX_ENA);
	361	SSYNC();
1e393c6e BL	362	}
	363
	364	int __init musb_platform_init(struct musb musb, void board_data)
	365	{
	366
	367	/*
	368	* Rev 1.0 BF549 EZ-KITs require PE7 to be high for both DEVICE
	369	* and OTG HOST modes, while rev 1.1 and greater require PE7 to
	370	* be low for DEVICE mode and high for HOST mode. We set it high
	371	* here because we are in host mode
	372	*/
	373
	374	if (gpio_request(musb->config->gpio_vrsel, "USB_VRSEL")) {
	375	printk(KERN_ERR "Failed ro request USB_VRSEL GPIO_%d\n",
	376	musb->config->gpio_vrsel);
	377	return -ENODEV;
	378	}
	379	gpio_direction_output(musb->config->gpio_vrsel, 0);
	380
	381	usb_nop_xceiv_register();
	382	musb->xceiv = otg_get_transceiver();
	383	if (!musb->xceiv) {
	384	gpio_free(musb->config->gpio_vrsel);
	385	return -ENODEV;
	386	}
	387
	388	musb_platform_reg_init(musb);
0c6a8818 BW	389
	390	if (is_host_enabled(musb)) {
	391	musb->board_set_vbus = bfin_set_vbus;
	392	setup_timer(&musb_conn_timer,
	393	musb_conn_timer_handler, (unsigned long) musb);
	394	}
	395	if (is_peripheral_enabled(musb))
84e250ff	396	musb->xceiv->set_power = bfin_set_power;
0c6a8818 BW	397
	398	musb->isr = blackfin_interrupt;
	399
	400	return 0;
	401	}
	402
1e393c6e BL	403	#ifdef CONFIG_PM
	404	void musb_platform_save_context(struct musb *musb,
	405	struct musb_context_registers *musb_context)
	406	{
	407	if (is_host_active(musb))
	408	/*
	409	* During hibernate gpio_vrsel will change from high to low
	410	* low which will generate wakeup event resume the system
	411	* immediately. Set it to 0 before hibernate to avoid this
	412	* wakeup event.
	413	*/
	414	gpio_set_value(musb->config->gpio_vrsel, 0);
	415	}
	416
	417	void musb_platform_restore_context(struct musb *musb,
	418	struct musb_context_registers *musb_context)
	419	{
	420	musb_platform_reg_init(musb);
	421	}
	422	#endif
	423
0c6a8818 BW	424	int musb_platform_exit(struct musb *musb)
0c6a8818 BW	425	{
0c6a8818	426	gpio_free(musb->config->gpio_vrsel);
0c6a8818	427
f4053874	428	otg_put_transceiver(musb->xceiv);
3daad24d	429	usb_nop_xceiv_unregister();
0c6a8818 BW	430	return 0;
0c6a8818 BW	431	}