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

/*
 * arch/arm/mach-omap2/serial.c
 *
 * OMAP2 serial support.
 *
 * Copyright (C) 2005-2008 Nokia Corporation
 * Author: Paul Mundt <paul.mundt@nokia.com>
 *
 * Major rework for PM support by Kevin Hilman
 *
 * Based off of arch/arm/mach-omap/omap1/serial.c
 *
 * Copyright (C) 2009 Texas Instruments
 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/console.h>

#include <plat/omap-serial.h>
#include "common.h"
#include <plat/board.h>
#include <plat/dma.h>
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
#include <plat/omap-pm.h>

#include "prm2xxx_3xxx.h"
#include "pm.h"
#include "cm2xxx_3xxx.h"
#include "prm-regbits-34xx.h"
#include "control.h"
#include "mux.h"

/*
 * NOTE: By default the serial auto_suspend timeout is disabled as it causes
 * lost characters over the serial ports. This means that the UART clocks will
 * stay on until power/autosuspend_delay is set for the uart from sysfs.
 * This also causes that any deeper omap sleep states are blocked.
 */
#define DEFAULT_AUTOSUSPEND_DELAY	-1

#define MAX_UART_HWMOD_NAME_LEN		16

struct omap_uart_state {
	int num;
	int can_sleep;

	struct list_head node;
	struct omap_hwmod *oh;
	struct platform_device *pdev;
};

static LIST_HEAD(uart_list);
static u8 num_uarts;

#define DEFAULT_RXDMA_TIMEOUT		1	/* RX DMA polling rate (us) */
#define DEFAULT_RXDMA_BUFSIZE		4096	/* RX DMA buffer size */

static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
	{
		.dma_enabled	= false,
		.dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
		.dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
		.autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
	},
};

#ifdef CONFIG_PM

int omap_uart_can_sleep(void)
{
	struct omap_uart_state *uart;
	int can_sleep = 1;

	list_for_each_entry(uart, &uart_list, node) {
		if (!uart->clocked)
			continue;

		if (!uart->can_sleep) {
			can_sleep = 0;
			continue;
		}

		/* This UART can now safely sleep. */
		omap_uart_allow_sleep(uart);
	}

	return can_sleep;
}

static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable)
{
	struct omap_device *od = to_omap_device(pdev);

	if (!od)
		return;

	if (enable)
		omap_hwmod_enable_wakeup(od->hwmods[0]);
	else
		omap_hwmod_disable_wakeup(od->hwmods[0]);
}

/*
 * Errata i291: [UART]:Cannot Acknowledge Idle Requests
 * in Smartidle Mode When Configured for DMA Operations.
 * WA: configure uart in force idle mode.
 */
static void omap_uart_set_noidle(struct platform_device *pdev)
{
	struct omap_device *od = to_omap_device(pdev);

	omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO);
}

static void omap_uart_set_forceidle(struct platform_device *pdev)
{
	struct omap_device *od = to_omap_device(pdev);

	omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_FORCE);
}

#else
static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable)
{}
static void omap_uart_set_noidle(struct platform_device *pdev) {}
static void omap_uart_set_forceidle(struct platform_device *pdev) {}
#endif /* CONFIG_PM */

#ifdef CONFIG_OMAP_MUX
static struct omap_device_pad default_uart1_pads[] __initdata = {
	{
		.name	= "uart1_cts.uart1_cts",
		.enable	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart1_rts.uart1_rts",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart1_tx.uart1_tx",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart1_rx.uart1_rx",
		.flags	= OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
		.enable	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
		.idle	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
	},
};

static struct omap_device_pad default_uart2_pads[] __initdata = {
	{
		.name	= "uart2_cts.uart2_cts",
		.enable	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart2_rts.uart2_rts",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart2_tx.uart2_tx",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart2_rx.uart2_rx",
		.flags	= OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
		.enable	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
		.idle	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
	},
};

static struct omap_device_pad default_uart3_pads[] __initdata = {
	{
		.name	= "uart3_cts_rctx.uart3_cts_rctx",
		.enable	= OMAP_PIN_INPUT_PULLUP | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart3_rts_sd.uart3_rts_sd",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart3_tx_irtx.uart3_tx_irtx",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart3_rx_irrx.uart3_rx_irrx",
		.flags	= OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
		.enable	= OMAP_PIN_INPUT | OMAP_MUX_MODE0,
		.idle	= OMAP_PIN_INPUT | OMAP_MUX_MODE0,
	},
};

static struct omap_device_pad default_omap36xx_uart4_pads[] __initdata = {
	{
		.name   = "gpmc_wait2.uart4_tx",
		.enable = OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "gpmc_wait3.uart4_rx",
		.flags	= OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
		.enable	= OMAP_PIN_INPUT | OMAP_MUX_MODE2,
		.idle	= OMAP_PIN_INPUT | OMAP_MUX_MODE2,
	},
};

static struct omap_device_pad default_omap4_uart4_pads[] __initdata = {
	{
		.name	= "uart4_tx.uart4_tx",
		.enable	= OMAP_PIN_OUTPUT | OMAP_MUX_MODE0,
	},
	{
		.name	= "uart4_rx.uart4_rx",
		.flags	= OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
		.enable	= OMAP_PIN_INPUT | OMAP_MUX_MODE0,
		.idle	= OMAP_PIN_INPUT | OMAP_MUX_MODE0,
	},
};

static void omap_serial_fill_default_pads(struct omap_board_data *bdata)
{
	switch (bdata->id) {
	case 0:
		bdata->pads = default_uart1_pads;
		bdata->pads_cnt = ARRAY_SIZE(default_uart1_pads);
		break;
	case 1:
		bdata->pads = default_uart2_pads;
		bdata->pads_cnt = ARRAY_SIZE(default_uart2_pads);
		break;
	case 2:
		bdata->pads = default_uart3_pads;
		bdata->pads_cnt = ARRAY_SIZE(default_uart3_pads);
		break;
	case 3:
		if (cpu_is_omap44xx()) {
			bdata->pads = default_omap4_uart4_pads;
			bdata->pads_cnt =
				ARRAY_SIZE(default_omap4_uart4_pads);
		} else if (cpu_is_omap3630()) {
			bdata->pads = default_omap36xx_uart4_pads;
			bdata->pads_cnt =
				ARRAY_SIZE(default_omap36xx_uart4_pads);
		}
		break;
	default:
		break;
	}
}
#else
static void omap_serial_fill_default_pads(struct omap_board_data *bdata) {}
#endif

static int __init omap_serial_early_init(void)
{
	int i = 0;

	do {
		char oh_name[MAX_UART_HWMOD_NAME_LEN];
		struct omap_hwmod *oh;
		struct omap_uart_state *uart;

		snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN,
			 "uart%d", i + 1);
		oh = omap_hwmod_lookup(oh_name);
		if (!oh)
			break;

		uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL);
		if (WARN_ON(!uart))
			return -ENODEV;

		uart->oh = oh;
		uart->num = i++;
		list_add_tail(&uart->node, &uart_list);
		num_uarts++;

		/*
		 * NOTE: omap_hwmod_setup*() has not yet been called,
		 *       so no hwmod functions will work yet.
		 */

		/*
		 * During UART early init, device need to be probed
		 * to determine SoC specific init before omap_device
		 * is ready.  Therefore, don't allow idle here
		 */
		uart->oh->flags |= HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET;
	} while (1);

	return 0;
}
core_initcall(omap_serial_early_init);

/**
 * omap_serial_init_port() - initialize single serial port
 * @bdata: port specific board data pointer
 * @info: platform specific data pointer
 *
 * This function initialies serial driver for given port only.
 * Platforms can call this function instead of omap_serial_init()
 * if they don't plan to use all available UARTs as serial ports.
 *
 * Don't mix calls to omap_serial_init_port() and omap_serial_init(),
 * use only one of the two.
 */
void __init omap_serial_init_port(struct omap_board_data *bdata,
			struct omap_uart_port_info *info)
{
	struct omap_uart_state *uart;
	struct omap_hwmod *oh;
	struct platform_device *pdev;
	void *pdata = NULL;
	u32 pdata_size = 0;
	char *name;
	struct omap_uart_port_info omap_up;

	if (WARN_ON(!bdata))
		return;
	if (WARN_ON(bdata->id < 0))
		return;
	if (WARN_ON(bdata->id >= num_uarts))
		return;

	list_for_each_entry(uart, &uart_list, node)
		if (bdata->id == uart->num)
			break;
	if (!info)
		info = omap_serial_default_info;

	oh = uart->oh;
	name = DRIVER_NAME;

	omap_up.dma_enabled = info->dma_enabled;
	omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
	omap_up.flags = UPF_BOOT_AUTOCONF;
	omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
	omap_up.set_forceidle = omap_uart_set_forceidle;
	omap_up.set_noidle = omap_uart_set_noidle;
	omap_up.enable_wakeup = omap_uart_enable_wakeup;
	omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
	omap_up.dma_rx_timeout = info->dma_rx_timeout;
	omap_up.autosuspend_timeout = info->autosuspend_timeout;

	/* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */
	if (!cpu_is_omap2420() && !cpu_is_ti816x())
		omap_up.errata |= UART_ERRATA_i202_MDR1_ACCESS;

	/* Enable DMA Mode Force Idle Errata i291 for omap34xx/3630 */
	if (cpu_is_omap34xx() || cpu_is_omap3630())
		omap_up.errata |= UART_ERRATA_i291_DMA_FORCEIDLE;

	pdata = &omap_up;
	pdata_size = sizeof(struct omap_uart_port_info);

	if (WARN_ON(!oh))
		return;

	pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size,
				 NULL, 0, false);
	WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n",
	     name, oh->name);

	omap_device_disable_idle_on_suspend(pdev);
	oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);

	uart->pdev = pdev;

	oh->dev_attr = uart;

	console_lock(); /* in case the earlycon is on the UART */

	/*
	 * Because of early UART probing, UART did not get idled
	 * on init.  Now that omap_device is ready, ensure full idle
	 * before doing omap_device_enable().
	 */
	omap_hwmod_idle(uart->oh);

	omap_device_enable(uart->pdev);
	omap_device_idle(uart->pdev);

	console_unlock();

	if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads)
		device_init_wakeup(&pdev->dev, true);
}

/**
 * omap_serial_board_init() - initialize all supported serial ports
 * @info: platform specific data pointer
 *
 * Initializes all available UARTs as serial ports. Platforms
 * can call this function when they want to have default behaviour
 * for serial ports (e.g initialize them all as serial ports).
 */
void __init omap_serial_board_init(struct omap_uart_port_info *info)
{
	struct omap_uart_state *uart;
	struct omap_board_data bdata;

	list_for_each_entry(uart, &uart_list, node) {
		bdata.id = uart->num;
		bdata.flags = 0;
		bdata.pads = NULL;
		bdata.pads_cnt = 0;

		if (cpu_is_omap44xx() || cpu_is_omap34xx())
			omap_serial_fill_default_pads(&bdata);

		if (!info)
			omap_serial_init_port(&bdata, NULL);
		else
			omap_serial_init_port(&bdata, &info[uart->num]);
	}
}

/**
 * omap_serial_init() - initialize all supported serial ports
 *
 * Initializes all available UARTs.
 * Platforms can call this function when they want to have default behaviour
 * for serial ports (e.g initialize them all as serial ports).
 */
void __init omap_serial_init(void)
{
	omap_serial_board_init(NULL);
}
Commit	Line	Data
1dbae815	1	/*
f30c2269	2	* arch/arm/mach-omap2/serial.c
1dbae815 TL	3	*
	4	* OMAP2 serial support.
	5	*
6e81176d	6	* Copyright (C) 2005-2008 Nokia Corporation
1dbae815 TL	7	* Author: Paul Mundt <paul.mundt@nokia.com>
1dbae815 TL	8	*
4af4016c KH	9	* Major rework for PM support by Kevin Hilman
4af4016c KH	10	*
1dbae815 TL	11	* Based off of arch/arm/mach-omap/omap1/serial.c
1dbae815 TL	12	*
44169075 SS	13	* Copyright (C) 2009 Texas Instruments
	14	* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com
	15	*
1dbae815 TL	16	* This file is subject to the terms and conditions of the GNU General Public
	17	* License. See the file "COPYING" in the main directory of this archive
	18	* for more details.
	19	*/
	20	#include <linux/kernel.h>
	21	#include <linux/init.h>
f8ce2547	22	#include <linux/clk.h>
fced80c7	23	#include <linux/io.h>
e03d37d8	24	#include <linux/delay.h>
6f251e9d KH	25	#include <linux/platform_device.h>
6f251e9d KH	26	#include <linux/slab.h>
3244fcd2	27	#include <linux/pm_runtime.h>
0d8e2d0d	28	#include <linux/console.h>
6f251e9d	29
6f251e9d	30	#include <plat/omap-serial.h>
4e65331c	31	#include "common.h"
ce491cf8	32	#include <plat/board.h>
6f251e9d KH	33	#include <plat/dma.h>
	34	#include <plat/omap_hwmod.h>
	35	#include <plat/omap_device.h>
ec3bebc6	36	#include <plat/omap-pm.h>
4af4016c	37
59fb659b	38	#include "prm2xxx_3xxx.h"
4af4016c	39	#include "pm.h"
59fb659b	40	#include "cm2xxx_3xxx.h"
4af4016c	41	#include "prm-regbits-34xx.h"
4814ced5	42	#include "control.h"
40e44399	43	#include "mux.h"
4af4016c	44
301fe8ee	45	/*
c86845db D	46	* NOTE: By default the serial auto_suspend timeout is disabled as it causes
	47	* lost characters over the serial ports. This means that the UART clocks will
	48	* stay on until power/autosuspend_delay is set for the uart from sysfs.
	49	* This also causes that any deeper omap sleep states are blocked.
301fe8ee	50	*/
c86845db	51	#define DEFAULT_AUTOSUSPEND_DELAY -1
4af4016c	52
6f251e9d KH	53	#define MAX_UART_HWMOD_NAME_LEN 16
6f251e9d KH	54
4af4016c KH	55	struct omap_uart_state {
	56	int num;
	57	int can_sleep;
4af4016c	58
4af4016c	59	struct list_head node;
6f251e9d KH	60	struct omap_hwmod *oh;
6f251e9d KH	61	struct platform_device *pdev;
4af4016c KH	62	};
4af4016c KH	63
4af4016c	64	static LIST_HEAD(uart_list);
6f251e9d	65	static u8 num_uarts;
1dbae815	66
c86845db D	67	#define DEFAULT_RXDMA_TIMEOUT 1 /* RX DMA polling rate (us) */
	68	#define DEFAULT_RXDMA_BUFSIZE 4096 /* RX DMA buffer size */
	69
	70	static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
	71	{
	72	.dma_enabled = false,
	73	.dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
	74	.dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
	75	.autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
	76	},
	77	};
	78
4af4016c KH	79	#ifdef CONFIG_PM
4af4016c KH	80
4af4016c KH	81	int omap_uart_can_sleep(void)
	82	{
	83	struct omap_uart_state *uart;
	84	int can_sleep = 1;
	85
	86	list_for_each_entry(uart, &uart_list, node) {
	87	if (!uart->clocked)
	88	continue;
	89
	90	if (!uart->can_sleep) {
	91	can_sleep = 0;
	92	continue;
6e81176d	93	}
4af4016c KH	94
	95	/* This UART can now safely sleep. */
	96	omap_uart_allow_sleep(uart);
6e81176d	97	}
4af4016c KH	98
4af4016c KH	99	return can_sleep;
6e81176d JH	100	}
6e81176d JH	101
62f3ec5f	102	static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable)
4af4016c	103	{
62f3ec5f	104	struct omap_device *od = to_omap_device(pdev);
4af4016c	105
62f3ec5f G	106	if (!od)
62f3ec5f G	107	return;
4af4016c	108
62f3ec5f G	109	if (enable)
	110	omap_hwmod_enable_wakeup(od->hwmods[0]);
	111	else
	112	omap_hwmod_disable_wakeup(od->hwmods[0]);
ba87a9be JH	113	}
ba87a9be JH	114
94734749 G	115	/*
	116	* Errata i291: [UART]:Cannot Acknowledge Idle Requests
	117	* in Smartidle Mode When Configured for DMA Operations.
	118	* WA: configure uart in force idle mode.
	119	*/
	120	static void omap_uart_set_noidle(struct platform_device *pdev)
	121	{
	122	struct omap_device *od = to_omap_device(pdev);
	123
	124	omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO);
	125	}
	126
	127	static void omap_uart_set_forceidle(struct platform_device *pdev)
	128	{
	129	struct omap_device *od = to_omap_device(pdev);
	130
	131	omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_FORCE);
	132	}
	133
4af4016c	134	#else
62f3ec5f G	135	static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable)
62f3ec5f G	136	{}
94734749 G	137	static void omap_uart_set_noidle(struct platform_device *pdev) {}
94734749 G	138	static void omap_uart_set_forceidle(struct platform_device *pdev) {}
4af4016c KH	139	#endif /* CONFIG_PM */
4af4016c KH	140
7496ba30 G	141	#ifdef CONFIG_OMAP_MUX
	142	static struct omap_device_pad default_uart1_pads[] __initdata = {
	143	{
	144	.name = "uart1_cts.uart1_cts",
	145	.enable = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	146	},
	147	{
	148	.name = "uart1_rts.uart1_rts",
	149	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	150	},
	151	{
	152	.name = "uart1_tx.uart1_tx",
	153	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	154	},
	155	{
	156	.name = "uart1_rx.uart1_rx",
	157	.flags = OMAP_DEVICE_PAD_REMUX \| OMAP_DEVICE_PAD_WAKEUP,
	158	.enable = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	159	.idle = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	160	},
	161	};
	162
	163	static struct omap_device_pad default_uart2_pads[] __initdata = {
	164	{
	165	.name = "uart2_cts.uart2_cts",
	166	.enable = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	167	},
	168	{
	169	.name = "uart2_rts.uart2_rts",
	170	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	171	},
	172	{
	173	.name = "uart2_tx.uart2_tx",
	174	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	175	},
	176	{
	177	.name = "uart2_rx.uart2_rx",
	178	.flags = OMAP_DEVICE_PAD_REMUX \| OMAP_DEVICE_PAD_WAKEUP,
	179	.enable = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	180	.idle = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	181	},
	182	};
	183
	184	static struct omap_device_pad default_uart3_pads[] __initdata = {
	185	{
	186	.name = "uart3_cts_rctx.uart3_cts_rctx",
	187	.enable = OMAP_PIN_INPUT_PULLUP \| OMAP_MUX_MODE0,
	188	},
	189	{
	190	.name = "uart3_rts_sd.uart3_rts_sd",
	191	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	192	},
	193	{
	194	.name = "uart3_tx_irtx.uart3_tx_irtx",
	195	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
	196	},
	197	{
	198	.name = "uart3_rx_irrx.uart3_rx_irrx",
	199	.flags = OMAP_DEVICE_PAD_REMUX \| OMAP_DEVICE_PAD_WAKEUP,
	200	.enable = OMAP_PIN_INPUT \| OMAP_MUX_MODE0,
	201	.idle = OMAP_PIN_INPUT \| OMAP_MUX_MODE0,
	202	},
	203	};
	204
205	static struct omap_device_pad default_omap36xx_uart4_pads[] __initdata = {
206	{
207	.name = "gpmc_wait2.uart4_tx",
208	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
209	},
210	{
211	.name = "gpmc_wait3.uart4_rx",
212	.flags = OMAP_DEVICE_PAD_REMUX \| OMAP_DEVICE_PAD_WAKEUP,
213	.enable = OMAP_PIN_INPUT \| OMAP_MUX_MODE2,
214	.idle = OMAP_PIN_INPUT \| OMAP_MUX_MODE2,
215	},
216	};
217
218	static struct omap_device_pad default_omap4_uart4_pads[] __initdata = {
219	{
220	.name = "uart4_tx.uart4_tx",
221	.enable = OMAP_PIN_OUTPUT \| OMAP_MUX_MODE0,
222	},
223	{
224	.name = "uart4_rx.uart4_rx",
225	.flags = OMAP_DEVICE_PAD_REMUX \| OMAP_DEVICE_PAD_WAKEUP,
226	.enable = OMAP_PIN_INPUT \| OMAP_MUX_MODE0,
227	.idle = OMAP_PIN_INPUT \| OMAP_MUX_MODE0,
228	},
229	};
230
231	static void omap_serial_fill_default_pads(struct omap_board_data *bdata)
232	{
233	switch (bdata->id) {
234	case 0:
235	bdata->pads = default_uart1_pads;
236	bdata->pads_cnt = ARRAY_SIZE(default_uart1_pads);
237	break;
238	case 1:
239	bdata->pads = default_uart2_pads;
240	bdata->pads_cnt = ARRAY_SIZE(default_uart2_pads);
241	break;
242	case 2:
243	bdata->pads = default_uart3_pads;
244	bdata->pads_cnt = ARRAY_SIZE(default_uart3_pads);
245	break;
246	case 3:
247	if (cpu_is_omap44xx()) {
248	bdata->pads = default_omap4_uart4_pads;
249	bdata->pads_cnt =
250	ARRAY_SIZE(default_omap4_uart4_pads);
251	} else if (cpu_is_omap3630()) {
252	bdata->pads = default_omap36xx_uart4_pads;
253	bdata->pads_cnt =
254	ARRAY_SIZE(default_omap36xx_uart4_pads);
255	}
256	break;
257	default:
258	break;
259	}
260	}
261	#else
262	static void omap_serial_fill_default_pads(struct omap_board_data *bdata) {}
263	#endif
264
3e16f925	265	static int __init omap_serial_early_init(void)
1dbae815	266	{
6f251e9d	267	int i = 0;
1dbae815	268
6f251e9d KH	269	do {
	270	char oh_name[MAX_UART_HWMOD_NAME_LEN];
	271	struct omap_hwmod *oh;
	272	struct omap_uart_state *uart;
21b90340	273
6f251e9d KH	274	snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN,
	275	"uart%d", i + 1);
	276	oh = omap_hwmod_lookup(oh_name);
	277	if (!oh)
	278	break;
	279
	280	uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL);
	281	if (WARN_ON(!uart))
3e16f925	282	return -ENODEV;
1dbae815	283
6f251e9d KH	284	uart->oh = oh;
	285	uart->num = i++;
	286	list_add_tail(&uart->node, &uart_list);
	287	num_uarts++;
1dbae815	288
84f90c9c	289	/*
550c8092	290	* NOTE: omap_hwmod_setup*() has not yet been called,
6f251e9d	291	* so no hwmod functions will work yet.
84f90c9c	292	*/
6e81176d	293
6f251e9d KH	294	/*
	295	* During UART early init, device need to be probed
	296	* to determine SoC specific init before omap_device
	297	* is ready. Therefore, don't allow idle here
	298	*/
	299	uart->oh->flags \|= HWMOD_INIT_NO_IDLE \| HWMOD_INIT_NO_RESET;
	300	} while (1);
3e16f925 TL	301
3e16f925 TL	302	return 0;
b3c6df3a	303	}
3e16f925	304	core_initcall(omap_serial_early_init);
b3c6df3a	305
f62349ee MW	306	/**
f62349ee MW	307	* omap_serial_init_port() - initialize single serial port
40e44399	308	* @bdata: port specific board data pointer
c86845db	309	* @info: platform specific data pointer
f62349ee	310	*
40e44399	311	* This function initialies serial driver for given port only.
f62349ee MW	312	* Platforms can call this function instead of omap_serial_init()
	313	* if they don't plan to use all available UARTs as serial ports.
	314	*
	315	* Don't mix calls to omap_serial_init_port() and omap_serial_init(),
	316	* use only one of the two.
	317	*/
c86845db D	318	void __init omap_serial_init_port(struct omap_board_data *bdata,
c86845db D	319	struct omap_uart_port_info *info)
b3c6df3a	320	{
f62349ee	321	struct omap_uart_state *uart;
6f251e9d	322	struct omap_hwmod *oh;
3528c58e	323	struct platform_device *pdev;
6f251e9d KH	324	void *pdata = NULL;
	325	u32 pdata_size = 0;
	326	char *name;
6f251e9d	327	struct omap_uart_port_info omap_up;
970a724d	328
40e44399	329	if (WARN_ON(!bdata))
6f251e9d	330	return;
40e44399 TL	331	if (WARN_ON(bdata->id < 0))
	332	return;
	333	if (WARN_ON(bdata->id >= num_uarts))
e88d556d	334	return;
f62349ee	335
6f251e9d	336	list_for_each_entry(uart, &uart_list, node)
40e44399	337	if (bdata->id == uart->num)
6f251e9d	338	break;
c86845db D	339	if (!info)
c86845db D	340	info = omap_serial_default_info;
f2eeeae0	341
6f251e9d	342	oh = uart->oh;
6f251e9d KH	343	name = DRIVER_NAME;
6f251e9d KH	344
c86845db	345	omap_up.dma_enabled = info->dma_enabled;
6f251e9d	346	omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
273558b3	347	omap_up.flags = UPF_BOOT_AUTOCONF;
ec3bebc6	348	omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
94734749 G	349	omap_up.set_forceidle = omap_uart_set_forceidle;
94734749 G	350	omap_up.set_noidle = omap_uart_set_noidle;
62f3ec5f	351	omap_up.enable_wakeup = omap_uart_enable_wakeup;
c86845db D	352	omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
	353	omap_up.dma_rx_timeout = info->dma_rx_timeout;
	354	omap_up.autosuspend_timeout = info->autosuspend_timeout;
94734749 G	355
	356	/* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */
	357	if (!cpu_is_omap2420() && !cpu_is_ti816x())
	358	omap_up.errata \|= UART_ERRATA_i202_MDR1_ACCESS;
	359
	360	/* Enable DMA Mode Force Idle Errata i291 for omap34xx/3630 */
	361	if (cpu_is_omap34xx() \|\| cpu_is_omap3630())
	362	omap_up.errata \|= UART_ERRATA_i291_DMA_FORCEIDLE;
6f251e9d KH	363
	364	pdata = &omap_up;
	365	pdata_size = sizeof(struct omap_uart_port_info);
6f251e9d KH	366
	367	if (WARN_ON(!oh))
	368	return;
	369
3528c58e	370	pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size,
f718e2c0	371	NULL, 0, false);
3528c58e	372	WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n",
6f251e9d KH	373	name, oh->name);
6f251e9d KH	374
9f8b6949	375	omap_device_disable_idle_on_suspend(pdev);
40e44399 TL	376	oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);
40e44399 TL	377
3528c58e	378	uart->pdev = pdev;
6f251e9d KH	379
	380	oh->dev_attr = uart;
	381
ac751efa	382	console_lock(); /* in case the earlycon is on the UART */
0d8e2d0d	383
6f251e9d KH	384	/*
	385	* Because of early UART probing, UART did not get idled
	386	* on init. Now that omap_device is ready, ensure full idle
	387	* before doing omap_device_enable().
	388	*/
	389	omap_hwmod_idle(uart->oh);
	390
	391	omap_device_enable(uart->pdev);
6f251e9d KH	392	omap_device_idle(uart->pdev);
6f251e9d KH	393
ac751efa	394	console_unlock();
0d8e2d0d	395
62f3ec5f	396	if ((cpu_is_omap34xx() \|\| cpu_is_omap44xx()) && bdata->pads)
3528c58e	397	device_init_wakeup(&pdev->dev, true);
f62349ee MW	398	}
	399
	400	/**
c86845db D	401	* omap_serial_board_init() - initialize all supported serial ports
c86845db D	402	* @info: platform specific data pointer
f62349ee MW	403	*
	404	* Initializes all available UARTs as serial ports. Platforms
	405	* can call this function when they want to have default behaviour
	406	* for serial ports (e.g initialize them all as serial ports).
	407	*/
c86845db	408	void __init omap_serial_board_init(struct omap_uart_port_info *info)
f62349ee	409	{
6f251e9d	410	struct omap_uart_state *uart;
40e44399	411	struct omap_board_data bdata;
f62349ee	412
40e44399 TL	413	list_for_each_entry(uart, &uart_list, node) {
	414	bdata.id = uart->num;
	415	bdata.flags = 0;
	416	bdata.pads = NULL;
	417	bdata.pads_cnt = 0;
7496ba30 G	418
	419	if (cpu_is_omap44xx() \|\| cpu_is_omap34xx())
	420	omap_serial_fill_default_pads(&bdata);
	421
c86845db D	422	if (!info)
	423	omap_serial_init_port(&bdata, NULL);
	424	else
	425	omap_serial_init_port(&bdata, &info[uart->num]);
40e44399	426	}
1dbae815	427	}
c86845db D	428
	429	/**
	430	* omap_serial_init() - initialize all supported serial ports
	431	*
	432	* Initializes all available UARTs.
	433	* Platforms can call this function when they want to have default behaviour
	434	* for serial ports (e.g initialize them all as serial ports).
	435	*/
	436	void __init omap_serial_init(void)
	437	{
	438	omap_serial_board_init(NULL);
	439	}