board/nokia/rx51/rx51.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2012
  * Ивайло Димитров <freemangordon@abv.bg>
  *
  * (C) Copyright 2011-2012
  * Pali Rohár <pali.rohar@gmail.com>
  *
  * (C) Copyright 2010
  * Alistair Buxton <a.j.buxton@gmail.com>
  *
  * Derived from Beagle Board and 3430 SDP code:
  * (C) Copyright 2004-2008
  * Texas Instruments, <www.ti.com>
  *
  * Author :
  *	Sunil Kumar <sunilsaini05@gmail.com>
  *	Shashi Ranjan <shashiranjanmca05@gmail.com>
  *
  *	Richard Woodruff <r-woodruff2@ti.com>
  *	Syed Mohammed Khasim <khasim@ti.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <watchdog.h>
 #include <malloc.h>
 #include <twl4030.h>
 #include <i2c.h>
 #include <video_fb.h>
 #include <asm/io.h>
 #include <asm/setup.h>
 #include <asm/bitops.h>
 #include <asm/mach-types.h>
 #include <asm/arch/mux.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/mmc_host_def.h>

 #include "rx51.h"
 #include "tag_omap.h"

 DECLARE_GLOBAL_DATA_PTR;

 GraphicDevice gdev;

 const omap3_sysinfo sysinfo = {
 	DDR_STACKED,
 	"Nokia RX-51",
 	"OneNAND"
 };

 /* This structure contains default omap tags needed for booting Maemo 5 */
 static struct tag_omap omap[] = {
 	OMAP_TAG_UART_CONFIG(0x04),
 	OMAP_TAG_SERIAL_CONSOLE_CONFIG(0x03, 0x01C200),
 	OMAP_TAG_LCD_CONFIG("acx565akm", "internal", 90, 0x18),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_focus", 0x44, 0x1, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_launch", 0x45, 0x1, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_shutter", 0x6e, 0x1, 0x0, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_apeslpx", 0x46, 0x2, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_bsi", 0x9d, 0x2, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_en", 0x4a, 0x2, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_rst", 0x4b, 0x6, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_rst_rq", 0x49, 0x6, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_wddis", 0x0d, 0x2, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("headphone", 0xb1, 0x1, 0x1, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("kb_lock", 0x71, 0x1, 0x0, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("proximity", 0x59, 0x0, 0x0, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("sleep_ind", 0xa2, 0x2, 0x2, 0x0),
 	OMAP_TAG_GPIO_SWITCH_CONFIG("slide", GPIO_SLIDE, 0x0, 0x0, 0x0),
 	OMAP_TAG_WLAN_CX3110X_CONFIG(0x25, 0xff, 87, 42, -1),
 	OMAP_TAG_PARTITION_CONFIG(PART1_NAME, PART1_SIZE * PART1_MULL,
 			PART1_OFFS, PART1_MASK),
 	OMAP_TAG_PARTITION_CONFIG(PART2_NAME, PART2_SIZE * PART2_MULL,
 			PART2_OFFS, PART2_MASK),
 	OMAP_TAG_PARTITION_CONFIG(PART3_NAME, PART3_SIZE * PART3_MULL,
 			PART3_OFFS, PART3_MASK),
 	OMAP_TAG_PARTITION_CONFIG(PART4_NAME, PART4_SIZE * PART4_MULL,
 			PART4_OFFS, PART4_MASK),
 	OMAP_TAG_PARTITION_CONFIG(PART5_NAME, PART5_SIZE * PART5_MULL,
 			PART5_OFFS, PART5_MASK),
 	OMAP_TAG_PARTITION_CONFIG(PART6_NAME, PART6_SIZE * PART6_MULL,
 			PART6_OFFS, PART6_MASK),
 	OMAP_TAG_BOOT_REASON_CONFIG("pwr_key"),
 	OMAP_TAG_VERSION_STR_CONFIG("product", "RX-51"),
 	OMAP_TAG_VERSION_STR_CONFIG("hw-build", "2101"),
 	OMAP_TAG_VERSION_STR_CONFIG("nolo", "1.4.14"),
 	OMAP_TAG_VERSION_STR_CONFIG("boot-mode", "normal"),
 	{ }
 };

 static char *boot_reason_ptr;
 static char *hw_build_ptr;
 static char *nolo_version_ptr;
 static char *boot_mode_ptr;

 /*
  * Routine: init_omap_tags
  * Description: Initialize pointers to values in tag_omap
  */
 static void init_omap_tags(void)
 {
 	char *component;
 	char *version;
 	int i = 0;
 	while (omap[i].hdr.tag) {
 		switch (omap[i].hdr.tag) {
 		case OMAP_TAG_BOOT_REASON:
 			boot_reason_ptr = omap[i].u.boot_reason.reason_str;
 			break;
 		case OMAP_TAG_VERSION_STR:
 			component = omap[i].u.version.component;
 			version = omap[i].u.version.version;
 			if (strcmp(component, "hw-build") == 0)
 				hw_build_ptr = version;
 			else if (strcmp(component, "nolo") == 0)
 				nolo_version_ptr = version;
 			else if (strcmp(component, "boot-mode") == 0)
 				boot_mode_ptr = version;
 			break;
 		default:
 			break;
 		}
 		i++;
 	}
 }

 static void reuse_omap_atags(struct tag_omap *t)
 {
 	char *component;
 	char *version;
 	while (t->hdr.tag) {
 		switch (t->hdr.tag) {
 		case OMAP_TAG_BOOT_REASON:
 			memset(boot_reason_ptr, 0, 12);
 			strcpy(boot_reason_ptr, t->u.boot_reason.reason_str);
 			break;
 		case OMAP_TAG_VERSION_STR:
 			component = t->u.version.component;
 			version = t->u.version.version;
 			if (strcmp(component, "hw-build") == 0) {
 				memset(hw_build_ptr, 0, 12);
 				strcpy(hw_build_ptr, version);
 			} else if (strcmp(component, "nolo") == 0) {
 				memset(nolo_version_ptr, 0, 12);
 				strcpy(nolo_version_ptr, version);
 			} else if (strcmp(component, "boot-mode") == 0) {
 				memset(boot_mode_ptr, 0, 12);
 				strcpy(boot_mode_ptr, version);
 			}
 			break;
 		default:
 			break;
 		}
 		t = tag_omap_next(t);
 	}
 }

 /*
  * Routine: reuse_atags
  * Description: Reuse atags from previous bootloader.
  *              Reuse only only HW build, boot reason, boot mode and nolo
  */
 static void reuse_atags(void)
 {
 	struct tag *t = (struct tag *)gd->bd->bi_boot_params;

 	/* First tag must be ATAG_CORE */
 	if (t->hdr.tag != ATAG_CORE)
 		return;

 	if (!boot_reason_ptr || !hw_build_ptr)
 		return;

 	/* Last tag must be ATAG_NONE */
 	while (t->hdr.tag != ATAG_NONE) {
 		switch (t->hdr.tag) {
 		case ATAG_REVISION:
 			memset(hw_build_ptr, 0, 12);
 			sprintf(hw_build_ptr, "%x", t->u.revision.rev);
 			break;
 		case ATAG_BOARD:
 			reuse_omap_atags((struct tag_omap *)&t->u);
 			break;
 		default:
 			break;
 		}
 		t = tag_next(t);
 	}
 }

 /*
  * Routine: board_init
  * Description: Early hardware init.
  */
 int board_init(void)
 {
 	/* in SRAM or SDRAM, finish GPMC */
 	gpmc_init();
 	/* boot param addr */
 	gd->bd->bi_boot_params = OMAP34XX_SDRC_CS0 + 0x100;
 	return 0;
 }

 /*
  * Routine: get_board_revision
  * Description: Return board revision.
  */
 u32 get_board_rev(void)
 {
 	return simple_strtol(hw_build_ptr, NULL, 16);
 }

 /*
  * Routine: setup_board_tags
  * Description: Append board specific boot tags.
  */
 void setup_board_tags(struct tag **in_params)
 {
 	int setup_console_atag;
 	char *setup_boot_reason_atag;
 	char *setup_boot_mode_atag;
 	char *str;
 	int i;
 	int size;
 	int total_size;
 	struct tag *params;
 	struct tag_omap *t;

 	params = (struct tag *)gd->bd->bi_boot_params;

 	params->u.core.flags = 0x0;
 	params->u.core.pagesize = 0x1000;
 	params->u.core.rootdev = 0x0;

 	/* append omap atag only if env setup_omap_atag is set to 1 */
 	str = getenv("setup_omap_atag");
 	if (!str || str[0] != '1')
 		return;

 	str = getenv("setup_console_atag");
 	if (str && str[0] == '1')
 		setup_console_atag = 1;
 	else
 		setup_console_atag = 0;

 	setup_boot_reason_atag = getenv("setup_boot_reason_atag");
 	setup_boot_mode_atag = getenv("setup_boot_mode_atag");

 	params = *in_params;
 	t = (struct tag_omap *)&params->u;
 	total_size = sizeof(struct tag_header);

 	for (i = 0; omap[i].hdr.tag; i++) {

 		/* skip serial console tag */
 		if (!setup_console_atag &&
 			omap[i].hdr.tag == OMAP_TAG_SERIAL_CONSOLE)
 			continue;

 		size = omap[i].hdr.size + sizeof(struct tag_omap_header);
 		memcpy(t, &omap[i], size);

 		/* set uart tag to 0 - disable serial console */
 		if (!setup_console_atag && omap[i].hdr.tag == OMAP_TAG_UART)
 			t->u.uart.enabled_uarts = 0;

 		/* change boot reason */
 		if (setup_boot_reason_atag &&
 			omap[i].hdr.tag == OMAP_TAG_BOOT_REASON) {
 			memset(t->u.boot_reason.reason_str, 0, 12);
 			strcpy(t->u.boot_reason.reason_str,
 				setup_boot_reason_atag);
 		}

 		/* change boot mode */
 		if (setup_boot_mode_atag &&
 			omap[i].hdr.tag == OMAP_TAG_VERSION_STR &&
 			strcmp(omap[i].u.version.component, "boot-mode") == 0) {
 			memset(t->u.version.version, 0, 12);
 			strcpy(t->u.version.version, setup_boot_mode_atag);
 		}

 		total_size += size;
 		t = tag_omap_next(t);

 	}

 	params->hdr.tag = ATAG_BOARD;
 	params->hdr.size = total_size >> 2;
 	params = tag_next(params);

 	*in_params = params;
 }

 /*
  * Routine: video_hw_init
  * Description: Set up the GraphicDevice depending on sys_boot.
  */
 void *video_hw_init(void)
 {
 	/* fill in Graphic Device */
 	gdev.frameAdrs = 0x8f9c0000;
 	gdev.winSizeX = 800;
 	gdev.winSizeY = 480;
 	gdev.gdfBytesPP = 2;
 	gdev.gdfIndex = GDF_16BIT_565RGB;
 	memset((void *)gdev.frameAdrs, 0, 0xbb800);
 	return (void *) &gdev;
 }

 /*
  * Routine: twl4030_regulator_set_mode
  * Description: Set twl4030 regulator mode over i2c powerbus.
  */
 static void twl4030_regulator_set_mode(u8 id, u8 mode)
 {
 	u16 msg = MSG_SINGULAR(DEV_GRP_P1, id, mode);
 	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER,
 			     TWL4030_PM_MASTER_PB_WORD_MSB, msg >> 8);
 	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER,
 			     TWL4030_PM_MASTER_PB_WORD_LSB, msg & 0xff);
 }

 static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
 {
 	u32 i, num_params = *parameters;
 	u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA;

 	/*
 	 * copy the parameters to an un-cached area to avoid coherency
 	 * issues
 	 */
 	for (i = 0; i < num_params; i++) {
 		__raw_writel(*parameters, sram_scratch_space);
 		parameters++;
 		sram_scratch_space++;
 	}

 	/* Now make the PPA call */
 	do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
 }

 void omap3_set_aux_cr_secure(u32 acr)
 {
 	struct emu_hal_params_rx51 emu_romcode_params = { 0, };

 	emu_romcode_params.num_params = 2;
 	emu_romcode_params.param1 = acr;

 	omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
 			       (u32 *)&emu_romcode_params);
 }

 /*
  * Routine: omap3_update_aux_cr_secure_rx51
  * Description: Modify the contents Auxiliary Control Register.
  * Parameters:
  *   set_bits - bits to set in ACR
  *   clr_bits - bits to clear in ACR
  */
 static void omap3_update_aux_cr_secure_rx51(u32 set_bits, u32 clear_bits)
 {
 	u32 acr;

 	/* Read ACR */
 	asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
 	acr &= ~clear_bits;
 	acr |= set_bits;
 	omap3_set_aux_cr_secure(acr);
 }

 /*
  * Routine: misc_init_r
  * Description: Configure board specific parts.
  */
 int misc_init_r(void)
 {
 	char buf[12];
 	u8 state;

 	/* reset lp5523 led */
 	i2c_set_bus_num(1);
 	state = 0xff;
 	i2c_write(0x32, 0x3d, 1, &state, 1);
 	i2c_set_bus_num(0);

 	/* initialize twl4030 power managment */
 	twl4030_power_init();

 	/* set VSIM to 1.8V */
 	twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VSIM_DEDICATED,
 				TWL4030_PM_RECEIVER_VSIM_VSEL_18,
 				TWL4030_PM_RECEIVER_VSIM_DEV_GRP,
 				TWL4030_PM_RECEIVER_DEV_GRP_P1);

 	/* store I2C access state */
 	twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
 			    &state);

 	/* enable I2C access to powerbus (needed for twl4030 regulator) */
 	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
 			     0x02);

 	/* set VAUX3, VSIM and VMMC1 state to active - enable eMMC memory */
 	twl4030_regulator_set_mode(RES_VAUX3, RES_STATE_ACTIVE);
 	twl4030_regulator_set_mode(RES_VSIM, RES_STATE_ACTIVE);
 	twl4030_regulator_set_mode(RES_VMMC1, RES_STATE_ACTIVE);

 	/* restore I2C access state */
 	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
 			     state);

 	/* set env variable attkernaddr for relocated kernel */
 	sprintf(buf, "%#x", KERNEL_ADDRESS);
 	setenv("attkernaddr", buf);

 	/* initialize omap tags */
 	init_omap_tags();

 	/* reuse atags from previous bootloader */
 	reuse_atags();

 	dieid_num_r();
 	print_cpuinfo();

 	/*
 	 * Cortex-A8(r1p0..r1p2) errata 430973 workaround
 	 * Set IBE bit in Auxiliary Control Register
 	 *
 	 * Call this routine only on real secure device
 	 * Qemu does not implement secure PPA and crash
 	 */
 	if (get_device_type() == HS_DEVICE)
 		omap3_update_aux_cr_secure_rx51(1 << 6, 0);

 	return 0;
 }

 /*
  * Routine: set_muxconf_regs
  * Description: Setting up the configuration Mux registers specific to the
  *		hardware. Many pins need to be moved from protect to primary
  *		mode.
  */
 void set_muxconf_regs(void)
 {
 	MUX_RX51();
 }

 static unsigned long int twl_wd_time; /* last time of watchdog reset */
 static unsigned long int twl_i2c_lock;

 /*
  * Routine: hw_watchdog_reset
  * Description: Reset timeout of twl4030 watchdog.
  */
 void hw_watchdog_reset(void)
 {
 	u8 timeout = 0;

 	/* do not reset watchdog too often - max every 4s */
 	if (get_timer(twl_wd_time) < 4 * CONFIG_SYS_HZ)
 		return;

 	/* localy lock twl4030 i2c bus */
 	if (test_and_set_bit(0, &twl_i2c_lock))
 		return;

 	/* read actual watchdog timeout */
 	twl4030_i2c_read_u8(TWL4030_CHIP_PM_RECEIVER,
 			    TWL4030_PM_RECEIVER_WATCHDOG_CFG, &timeout);

 	/* timeout 0 means watchdog is disabled */
 	/* reset watchdog timeout to 31s (maximum) */
 	if (timeout != 0)
 		twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
 				     TWL4030_PM_RECEIVER_WATCHDOG_CFG, 31);

 	/* store last watchdog reset time */
 	twl_wd_time = get_timer(0);

 	/* localy unlock twl4030 i2c bus */
 	test_and_clear_bit(0, &twl_i2c_lock);
 }

 /*
  * TWL4030 keypad handler for cfb_console
  */

 static const char keymap[] = {
 	/* normal */
 	'q',  'o',  'p',  ',', '\b',    0,  'a',  's',
 	'w',  'd',  'f',  'g',  'h',  'j',  'k',  'l',
 	'e',  '.',    0,  '\r',   0,  'z',  'x',  'c',
 	'r',  'v',  'b',  'n',  'm',  ' ',  ' ',    0,
 	't',    0,    0,    0,    0,    0,    0,    0,
 	'y',    0,    0,    0,    0,    0,    0,    0,
 	'u',    0,    0,    0,    0,    0,    0,    0,
 	'i',    5,    6,    0,    0,    0,    0,    0,
 	/* fn */
 	'1',  '9',  '0',  '=', '\b',    0,  '*',  '+',
 	'2',  '#',  '-',  '_',  '(',  ')',  '&',  '!',
 	'3',  '?',  '^', '\r',    0,  156,  '$',  238,
 	'4',  '/', '\\',  '"', '\'',  '@',    0,  '<',
 	'5',  '|',  '>',    0,    0,    0,    0,    0,
 	'6',    0,    0,    0,    0,    0,    0,    0,
 	'7',    0,    0,    0,    0,    0,    0,    0,
 	'8',   16,   17,    0,    0,    0,    0,    0,
 };

 static u8 keys[8];
 static u8 old_keys[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 #define KEYBUF_SIZE 32
 static u8 keybuf[KEYBUF_SIZE];
 static u8 keybuf_head;
 static u8 keybuf_tail;

 /*
  * Routine: rx51_kp_init
  * Description: Initialize HW keyboard.
  */
 int rx51_kp_init(void)
 {
 	int ret = 0;
 	u8 ctrl;
 	ret = twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
 				  TWL4030_KEYPAD_KEYP_CTRL_REG, &ctrl);

 	if (ret)
 		return ret;

 	/* turn on keyboard and use hardware scanning */
 	ctrl |= TWL4030_KEYPAD_CTRL_KBD_ON;
 	ctrl |= TWL4030_KEYPAD_CTRL_SOFT_NRST;
 	ctrl |= TWL4030_KEYPAD_CTRL_SOFTMODEN;
 	ret |= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
 				    TWL4030_KEYPAD_KEYP_CTRL_REG, ctrl);
 	/* enable key event status */
 	ret |= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
 				    TWL4030_KEYPAD_KEYP_IMR1, 0xfe);
 	/* enable interrupt generation on rising and falling */
 	/* this is a workaround for qemu twl4030 emulation */
 	ret |= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
 				    TWL4030_KEYPAD_KEYP_EDR, 0x57);
 	/* enable ISR clear on read */
 	ret |= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
 				    TWL4030_KEYPAD_KEYP_SIH_CTRL, 0x05);
 	return 0;
 }

 static void rx51_kp_fill(u8 k, u8 mods)
 {
 	/* check if some cursor key without meta fn key was pressed */
 	if (!(mods & 2) && (k == 18 || k == 31 || k == 33 || k == 34)) {
 		keybuf[keybuf_tail++] = '\e';
 		keybuf_tail %= KEYBUF_SIZE;
 		keybuf[keybuf_tail++] = '[';
 		keybuf_tail %= KEYBUF_SIZE;
 		if (k == 18) /* up */
 			keybuf[keybuf_tail++] = 'A';
 		else if (k == 31) /* left */
 			keybuf[keybuf_tail++] = 'D';
 		else if (k == 33) /* down */
 			keybuf[keybuf_tail++] = 'B';
 		else if (k == 34) /* right */
 			keybuf[keybuf_tail++] = 'C';
 		keybuf_tail %= KEYBUF_SIZE;
 		return;
 	}

 	if (mods & 2) { /* fn meta key was pressed */
 		k = keymap[k+64];
 	} else {
 		k = keymap[k];
 		if (mods & 1) { /* ctrl key was pressed */
 			if (k >= 'a' && k <= 'z')
 				k -= 'a' - 1;
 		}
 		if (mods & 4) { /* shift key was pressed */
 			if (k >= 'a' && k <= 'z')
 				k += 'A' - 'a';
 			else if (k == '.')
 				k = ':';
 			else if (k == ',')
 				k = ';';
 		}
 	}
 	keybuf[keybuf_tail++] = k;
 	keybuf_tail %= KEYBUF_SIZE;
 }

 /*
  * Routine: rx51_kp_tstc
  * Description: Test if key was pressed (from buffer).
  */
 int rx51_kp_tstc(struct stdio_dev *sdev)
 {
 	u8 c, r, dk, i;
 	u8 intr;
 	u8 mods;

 	/* localy lock twl4030 i2c bus */
 	if (test_and_set_bit(0, &twl_i2c_lock))
 		return 0;

 	/* twl4030 remembers up to 2 events */
 	for (i = 0; i < 2; i++) {

 		/* check interrupt register for events */
 		twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
 				    TWL4030_KEYPAD_KEYP_ISR1 + (2 * i), &intr);

 		/* no event */
 		if (!(intr&1))
 			continue;

 		/* read the key state */
 		i2c_read(TWL4030_CHIP_KEYPAD,
 			TWL4030_KEYPAD_FULL_CODE_7_0, 1, keys, 8);

 		/* cut out modifier keys from the keystate */
 		mods = keys[4] >> 4;
 		keys[4] &= 0x0f;

 		for (c = 0; c < 8; c++) {

 			/* get newly pressed keys only */
 			dk = ((keys[c] ^ old_keys[c])&keys[c]);
 			old_keys[c] = keys[c];

 			/* fill the keybuf */
 			for (r = 0; r < 8; r++) {
 				if (dk&1)
 					rx51_kp_fill((c*8)+r, mods);
 				dk = dk >> 1;
 			}

 		}

 	}

 	/* localy unlock twl4030 i2c bus */
 	test_and_clear_bit(0, &twl_i2c_lock);

 	return (KEYBUF_SIZE + keybuf_tail - keybuf_head)%KEYBUF_SIZE;
 }

 /*
  * Routine: rx51_kp_getc
  * Description: Get last pressed key (from buffer).
  */
 int rx51_kp_getc(struct stdio_dev *sdev)
 {
 	keybuf_head %= KEYBUF_SIZE;
 	while (!rx51_kp_tstc(sdev))
 		WATCHDOG_RESET();
 	return keybuf[keybuf_head++];
 }

 /*
  * Routine: board_mmc_init
  * Description: Initialize mmc devices.
  */
 int board_mmc_init(bd_t *bis)
 {
 	omap_mmc_init(0, 0, 0, -1, -1);
 	omap_mmc_init(1, 0, 0, -1, -1);
 	return 0;
 }

 void board_mmc_power_init(void)
 {
 	twl4030_power_mmc_init(0);
 	twl4030_power_mmc_init(1);
 }
	/*
	* (C) Copyright 2012
	* Ивайло Димитров <freemangordon@abv.bg>
	*
	* (C) Copyright 2011-2012
	* Pali Rohár <pali.rohar@gmail.com>
	*
	* (C) Copyright 2010
	* Alistair Buxton <a.j.buxton@gmail.com>
	*
	* Derived from Beagle Board and 3430 SDP code:
	* (C) Copyright 2004-2008
	* Texas Instruments, <www.ti.com>
	*
	* Author :
	* Sunil Kumar <sunilsaini05@gmail.com>
	* Shashi Ranjan <shashiranjanmca05@gmail.com>
	*
	* Richard Woodruff <r-woodruff2@ti.com>
	* Syed Mohammed Khasim <khasim@ti.com>
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <watchdog.h>
	#include <malloc.h>
	#include <twl4030.h>
	#include <i2c.h>
	#include <video_fb.h>
	#include <asm/io.h>
	#include <asm/setup.h>
	#include <asm/bitops.h>
	#include <asm/mach-types.h>
	#include <asm/arch/mux.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/arch/mmc_host_def.h>

	#include "rx51.h"
	#include "tag_omap.h"

	DECLARE_GLOBAL_DATA_PTR;

	GraphicDevice gdev;

	const omap3_sysinfo sysinfo = {
	DDR_STACKED,
	"Nokia RX-51",
	"OneNAND"
	};

	/* This structure contains default omap tags needed for booting Maemo 5 */
	static struct tag_omap omap[] = {
	OMAP_TAG_UART_CONFIG(0x04),
	OMAP_TAG_SERIAL_CONSOLE_CONFIG(0x03, 0x01C200),
	OMAP_TAG_LCD_CONFIG("acx565akm", "internal", 90, 0x18),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_focus", 0x44, 0x1, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_launch", 0x45, 0x1, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cam_shutter", 0x6e, 0x1, 0x0, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_apeslpx", 0x46, 0x2, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_bsi", 0x9d, 0x2, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_en", 0x4a, 0x2, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_rst", 0x4b, 0x6, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_rst_rq", 0x49, 0x6, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("cmt_wddis", 0x0d, 0x2, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("headphone", 0xb1, 0x1, 0x1, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("kb_lock", 0x71, 0x1, 0x0, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("proximity", 0x59, 0x0, 0x0, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("sleep_ind", 0xa2, 0x2, 0x2, 0x0),
	OMAP_TAG_GPIO_SWITCH_CONFIG("slide", GPIO_SLIDE, 0x0, 0x0, 0x0),
	OMAP_TAG_WLAN_CX3110X_CONFIG(0x25, 0xff, 87, 42, -1),
	OMAP_TAG_PARTITION_CONFIG(PART1_NAME, PART1_SIZE * PART1_MULL,
	PART1_OFFS, PART1_MASK),
	OMAP_TAG_PARTITION_CONFIG(PART2_NAME, PART2_SIZE * PART2_MULL,
	PART2_OFFS, PART2_MASK),
	OMAP_TAG_PARTITION_CONFIG(PART3_NAME, PART3_SIZE * PART3_MULL,
	PART3_OFFS, PART3_MASK),
	OMAP_TAG_PARTITION_CONFIG(PART4_NAME, PART4_SIZE * PART4_MULL,
	PART4_OFFS, PART4_MASK),
	OMAP_TAG_PARTITION_CONFIG(PART5_NAME, PART5_SIZE * PART5_MULL,
	PART5_OFFS, PART5_MASK),
	OMAP_TAG_PARTITION_CONFIG(PART6_NAME, PART6_SIZE * PART6_MULL,
	PART6_OFFS, PART6_MASK),
	OMAP_TAG_BOOT_REASON_CONFIG("pwr_key"),
	OMAP_TAG_VERSION_STR_CONFIG("product", "RX-51"),
	OMAP_TAG_VERSION_STR_CONFIG("hw-build", "2101"),
	OMAP_TAG_VERSION_STR_CONFIG("nolo", "1.4.14"),
	OMAP_TAG_VERSION_STR_CONFIG("boot-mode", "normal"),
	{ }
	};

	static char *boot_reason_ptr;
	static char *hw_build_ptr;
	static char *nolo_version_ptr;
	static char *boot_mode_ptr;

	/*
	* Routine: init_omap_tags
	* Description: Initialize pointers to values in tag_omap
	*/
	static void init_omap_tags(void)
	{
	char *component;
	char *version;
	int i = 0;
	while (omap[i].hdr.tag) {
	switch (omap[i].hdr.tag) {
	case OMAP_TAG_BOOT_REASON:
	boot_reason_ptr = omap[i].u.boot_reason.reason_str;
	break;
	case OMAP_TAG_VERSION_STR:
	component = omap[i].u.version.component;
	version = omap[i].u.version.version;
	if (strcmp(component, "hw-build") == 0)
	hw_build_ptr = version;
	else if (strcmp(component, "nolo") == 0)
	nolo_version_ptr = version;
	else if (strcmp(component, "boot-mode") == 0)
	boot_mode_ptr = version;
	break;
	default:
	break;
	}
	i++;
	}
	}

	static void reuse_omap_atags(struct tag_omap *t)
	{
	char *component;
	char *version;
	while (t->hdr.tag) {
	switch (t->hdr.tag) {
	case OMAP_TAG_BOOT_REASON:
	memset(boot_reason_ptr, 0, 12);
	strcpy(boot_reason_ptr, t->u.boot_reason.reason_str);
	break;
	case OMAP_TAG_VERSION_STR:
	component = t->u.version.component;
	version = t->u.version.version;
	if (strcmp(component, "hw-build") == 0) {
	memset(hw_build_ptr, 0, 12);
	strcpy(hw_build_ptr, version);
	} else if (strcmp(component, "nolo") == 0) {
	memset(nolo_version_ptr, 0, 12);
	strcpy(nolo_version_ptr, version);
	} else if (strcmp(component, "boot-mode") == 0) {
	memset(boot_mode_ptr, 0, 12);
	strcpy(boot_mode_ptr, version);
	}
	break;
	default:
	break;
	}
	t = tag_omap_next(t);
	}
	}

	/*
	* Routine: reuse_atags
	* Description: Reuse atags from previous bootloader.
	* Reuse only only HW build, boot reason, boot mode and nolo
	*/
	static void reuse_atags(void)
	{
	struct tag t = (struct tag )gd->bd->bi_boot_params;

	/* First tag must be ATAG_CORE */
	if (t->hdr.tag != ATAG_CORE)
	return;

	if (!boot_reason_ptr \|\| !hw_build_ptr)
	return;

	/* Last tag must be ATAG_NONE */
	while (t->hdr.tag != ATAG_NONE) {
	switch (t->hdr.tag) {
	case ATAG_REVISION:
	memset(hw_build_ptr, 0, 12);
	sprintf(hw_build_ptr, "%x", t->u.revision.rev);
	break;
	case ATAG_BOARD:
	reuse_omap_atags((struct tag_omap *)&t->u);
	break;
	default:
	break;
	}
	t = tag_next(t);
	}
	}

	/*
	* Routine: board_init
	* Description: Early hardware init.
	*/
	int board_init(void)
	{
	/* in SRAM or SDRAM, finish GPMC */
	gpmc_init();
	/* boot param addr */
	gd->bd->bi_boot_params = OMAP34XX_SDRC_CS0 + 0x100;
	return 0;
	}

	/*
	* Routine: get_board_revision
	* Description: Return board revision.
	*/
	u32 get_board_rev(void)
	{
	return simple_strtol(hw_build_ptr, NULL, 16);
	}

	/*
	* Routine: setup_board_tags
	* Description: Append board specific boot tags.
	*/
	void setup_board_tags(struct tag **in_params)
	{
	int setup_console_atag;
	char *setup_boot_reason_atag;
	char *setup_boot_mode_atag;
	char *str;
	int i;
	int size;
	int total_size;
	struct tag *params;
	struct tag_omap *t;

	params = (struct tag *)gd->bd->bi_boot_params;

	params->u.core.flags = 0x0;
	params->u.core.pagesize = 0x1000;
	params->u.core.rootdev = 0x0;

	/* append omap atag only if env setup_omap_atag is set to 1 */
	str = getenv("setup_omap_atag");
	if (!str \|\| str[0] != '1')
	return;

	str = getenv("setup_console_atag");
	if (str && str[0] == '1')
	setup_console_atag = 1;
	else
	setup_console_atag = 0;

	setup_boot_reason_atag = getenv("setup_boot_reason_atag");
	setup_boot_mode_atag = getenv("setup_boot_mode_atag");

	params = *in_params;
	t = (struct tag_omap *)&params->u;
	total_size = sizeof(struct tag_header);

	for (i = 0; omap[i].hdr.tag; i++) {

	/* skip serial console tag */
	if (!setup_console_atag &&
	omap[i].hdr.tag == OMAP_TAG_SERIAL_CONSOLE)
	continue;

	size = omap[i].hdr.size + sizeof(struct tag_omap_header);
	memcpy(t, &omap[i], size);

	/* set uart tag to 0 - disable serial console */
	if (!setup_console_atag && omap[i].hdr.tag == OMAP_TAG_UART)
	t->u.uart.enabled_uarts = 0;

	/* change boot reason */
	if (setup_boot_reason_atag &&
	omap[i].hdr.tag == OMAP_TAG_BOOT_REASON) {
	memset(t->u.boot_reason.reason_str, 0, 12);
	strcpy(t->u.boot_reason.reason_str,
	setup_boot_reason_atag);
	}

	/* change boot mode */
	if (setup_boot_mode_atag &&
	omap[i].hdr.tag == OMAP_TAG_VERSION_STR &&
	strcmp(omap[i].u.version.component, "boot-mode") == 0) {
	memset(t->u.version.version, 0, 12);
	strcpy(t->u.version.version, setup_boot_mode_atag);
	}

	total_size += size;
	t = tag_omap_next(t);

	}

	params->hdr.tag = ATAG_BOARD;
	params->hdr.size = total_size >> 2;
	params = tag_next(params);

	*in_params = params;
	}

	/*
	* Routine: video_hw_init
	* Description: Set up the GraphicDevice depending on sys_boot.
	*/
	void *video_hw_init(void)
	{
	/* fill in Graphic Device */
	gdev.frameAdrs = 0x8f9c0000;
	gdev.winSizeX = 800;
	gdev.winSizeY = 480;
	gdev.gdfBytesPP = 2;
	gdev.gdfIndex = GDF_16BIT_565RGB;
	memset((void *)gdev.frameAdrs, 0, 0xbb800);
	return (void *) &gdev;
	}

	/*
	* Routine: twl4030_regulator_set_mode
	* Description: Set twl4030 regulator mode over i2c powerbus.
	*/
	static void twl4030_regulator_set_mode(u8 id, u8 mode)
	{
	u16 msg = MSG_SINGULAR(DEV_GRP_P1, id, mode);
	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER,
	TWL4030_PM_MASTER_PB_WORD_MSB, msg >> 8);
	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER,
	TWL4030_PM_MASTER_PB_WORD_LSB, msg & 0xff);
	}

	static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
	{
	u32 i, num_params = *parameters;
	u32 sram_scratch_space = (u32 )OMAP3_PUBLIC_SRAM_SCRATCH_AREA;

	/*
	* copy the parameters to an un-cached area to avoid coherency
	* issues
	*/
	for (i = 0; i < num_params; i++) {
	__raw_writel(*parameters, sram_scratch_space);
	parameters++;
	sram_scratch_space++;
	}

	/* Now make the PPA call */
	do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
	}

	void omap3_set_aux_cr_secure(u32 acr)
	{
	struct emu_hal_params_rx51 emu_romcode_params = { 0, };

	emu_romcode_params.num_params = 2;
	emu_romcode_params.param1 = acr;

	omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
	(u32 *)&emu_romcode_params);
	}

	/*
	* Routine: omap3_update_aux_cr_secure_rx51
	* Description: Modify the contents Auxiliary Control Register.
	* Parameters:
	* set_bits - bits to set in ACR
	* clr_bits - bits to clear in ACR
	*/
	static void omap3_update_aux_cr_secure_rx51(u32 set_bits, u32 clear_bits)
	{
	u32 acr;

	/* Read ACR */
	asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
	acr &= ~clear_bits;
	acr \|= set_bits;
	omap3_set_aux_cr_secure(acr);
	}

	/*
	* Routine: misc_init_r
	* Description: Configure board specific parts.
	*/
	int misc_init_r(void)
	{
	char buf[12];
	u8 state;

	/* reset lp5523 led */
	i2c_set_bus_num(1);
	state = 0xff;
	i2c_write(0x32, 0x3d, 1, &state, 1);
	i2c_set_bus_num(0);

	/* initialize twl4030 power managment */
	twl4030_power_init();

	/* set VSIM to 1.8V */
	twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VSIM_DEDICATED,
	TWL4030_PM_RECEIVER_VSIM_VSEL_18,
	TWL4030_PM_RECEIVER_VSIM_DEV_GRP,
	TWL4030_PM_RECEIVER_DEV_GRP_P1);

	/* store I2C access state */
	twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
	&state);

	/* enable I2C access to powerbus (needed for twl4030 regulator) */
	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
	0x02);

	/* set VAUX3, VSIM and VMMC1 state to active - enable eMMC memory */
	twl4030_regulator_set_mode(RES_VAUX3, RES_STATE_ACTIVE);
	twl4030_regulator_set_mode(RES_VSIM, RES_STATE_ACTIVE);
	twl4030_regulator_set_mode(RES_VMMC1, RES_STATE_ACTIVE);

	/* restore I2C access state */
	twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, TWL4030_PM_MASTER_PB_CFG,
	state);

	/* set env variable attkernaddr for relocated kernel */
	sprintf(buf, "%#x", KERNEL_ADDRESS);
	setenv("attkernaddr", buf);

	/* initialize omap tags */
	init_omap_tags();

	/* reuse atags from previous bootloader */
	reuse_atags();

	dieid_num_r();
	print_cpuinfo();

	/*
	* Cortex-A8(r1p0..r1p2) errata 430973 workaround
	* Set IBE bit in Auxiliary Control Register
	*
	* Call this routine only on real secure device
	* Qemu does not implement secure PPA and crash
	*/
	if (get_device_type() == HS_DEVICE)
	omap3_update_aux_cr_secure_rx51(1 << 6, 0);

	return 0;
	}

	/*
	* Routine: set_muxconf_regs
	* Description: Setting up the configuration Mux registers specific to the
	* hardware. Many pins need to be moved from protect to primary
	* mode.
	*/
	void set_muxconf_regs(void)
	{
	MUX_RX51();
	}

	static unsigned long int twl_wd_time; /* last time of watchdog reset */
	static unsigned long int twl_i2c_lock;

	/*
	* Routine: hw_watchdog_reset
	* Description: Reset timeout of twl4030 watchdog.
	*/
	void hw_watchdog_reset(void)
	{
	u8 timeout = 0;

	/* do not reset watchdog too often - max every 4s */
	if (get_timer(twl_wd_time) < 4 * CONFIG_SYS_HZ)
	return;

	/* localy lock twl4030 i2c bus */
	if (test_and_set_bit(0, &twl_i2c_lock))
	return;

	/* read actual watchdog timeout */
	twl4030_i2c_read_u8(TWL4030_CHIP_PM_RECEIVER,
	TWL4030_PM_RECEIVER_WATCHDOG_CFG, &timeout);

	/* timeout 0 means watchdog is disabled */
	/* reset watchdog timeout to 31s (maximum) */
	if (timeout != 0)
	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
	TWL4030_PM_RECEIVER_WATCHDOG_CFG, 31);

	/* store last watchdog reset time */
	twl_wd_time = get_timer(0);

	/* localy unlock twl4030 i2c bus */
	test_and_clear_bit(0, &twl_i2c_lock);
	}

	/*
	* TWL4030 keypad handler for cfb_console
	*/

	static const char keymap[] = {
	/* normal */
	'q', 'o', 'p', ',', '\b', 0, 'a', 's',
	'w', 'd', 'f', 'g', 'h', 'j', 'k', 'l',
	'e', '.', 0, '\r', 0, 'z', 'x', 'c',
	'r', 'v', 'b', 'n', 'm', ' ', ' ', 0,
	't', 0, 0, 0, 0, 0, 0, 0,
	'y', 0, 0, 0, 0, 0, 0, 0,
	'u', 0, 0, 0, 0, 0, 0, 0,
	'i', 5, 6, 0, 0, 0, 0, 0,
	/* fn */
	'1', '9', '0', '=', '\b', 0, '*', '+',
	'2', '#', '-', '_', '(', ')', '&', '!',
	'3', '?', '^', '\r', 0, 156, '$', 238,
	'4', '/', '\\', '"', '\'', '@', 0, '<',
	'5', '\|', '>', 0, 0, 0, 0, 0,
	'6', 0, 0, 0, 0, 0, 0, 0,
	'7', 0, 0, 0, 0, 0, 0, 0,
	'8', 16, 17, 0, 0, 0, 0, 0,
	};

	static u8 keys[8];
	static u8 old_keys[8] = {0, 0, 0, 0, 0, 0, 0, 0};
	#define KEYBUF_SIZE 32
	static u8 keybuf[KEYBUF_SIZE];
	static u8 keybuf_head;
	static u8 keybuf_tail;

	/*
	* Routine: rx51_kp_init
	* Description: Initialize HW keyboard.
	*/
	int rx51_kp_init(void)
	{
	int ret = 0;
	u8 ctrl;
	ret = twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_CTRL_REG, &ctrl);

	if (ret)
	return ret;

	/* turn on keyboard and use hardware scanning */
	ctrl \|= TWL4030_KEYPAD_CTRL_KBD_ON;
	ctrl \|= TWL4030_KEYPAD_CTRL_SOFT_NRST;
	ctrl \|= TWL4030_KEYPAD_CTRL_SOFTMODEN;
	ret \|= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_CTRL_REG, ctrl);
	/* enable key event status */
	ret \|= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_IMR1, 0xfe);
	/* enable interrupt generation on rising and falling */
	/* this is a workaround for qemu twl4030 emulation */
	ret \|= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_EDR, 0x57);
	/* enable ISR clear on read */
	ret \|= twl4030_i2c_write_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_SIH_CTRL, 0x05);
	return 0;
	}

	static void rx51_kp_fill(u8 k, u8 mods)
	{
	/* check if some cursor key without meta fn key was pressed */
	if (!(mods & 2) && (k == 18 \|\| k == 31 \|\| k == 33 \|\| k == 34)) {
	keybuf[keybuf_tail++] = '\e';
	keybuf_tail %= KEYBUF_SIZE;
	keybuf[keybuf_tail++] = '[';
	keybuf_tail %= KEYBUF_SIZE;
	if (k == 18) /* up */
	keybuf[keybuf_tail++] = 'A';
	else if (k == 31) /* left */
	keybuf[keybuf_tail++] = 'D';
	else if (k == 33) /* down */
	keybuf[keybuf_tail++] = 'B';
	else if (k == 34) /* right */
	keybuf[keybuf_tail++] = 'C';
	keybuf_tail %= KEYBUF_SIZE;
	return;
	}

	if (mods & 2) { /* fn meta key was pressed */
	k = keymap[k+64];
	} else {
	k = keymap[k];
	if (mods & 1) { /* ctrl key was pressed */
	if (k >= 'a' && k <= 'z')
	k -= 'a' - 1;
	}
	if (mods & 4) { /* shift key was pressed */
	if (k >= 'a' && k <= 'z')
	k += 'A' - 'a';
	else if (k == '.')
	k = ':';
	else if (k == ',')
	k = ';';
	}
	}
	keybuf[keybuf_tail++] = k;
	keybuf_tail %= KEYBUF_SIZE;
	}

	/*
	* Routine: rx51_kp_tstc
	* Description: Test if key was pressed (from buffer).
	*/
	int rx51_kp_tstc(struct stdio_dev *sdev)
	{
	u8 c, r, dk, i;
	u8 intr;
	u8 mods;

	/* localy lock twl4030 i2c bus */
	if (test_and_set_bit(0, &twl_i2c_lock))
	return 0;

	/* twl4030 remembers up to 2 events */
	for (i = 0; i < 2; i++) {

	/* check interrupt register for events */
	twl4030_i2c_read_u8(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_KEYP_ISR1 + (2 * i), &intr);

	/* no event */
	if (!(intr&1))
	continue;

	/* read the key state */
	i2c_read(TWL4030_CHIP_KEYPAD,
	TWL4030_KEYPAD_FULL_CODE_7_0, 1, keys, 8);

	/* cut out modifier keys from the keystate */
	mods = keys[4] >> 4;
	keys[4] &= 0x0f;

	for (c = 0; c < 8; c++) {

	/* get newly pressed keys only */
	dk = ((keys[c] ^ old_keys[c])&keys[c]);
	old_keys[c] = keys[c];

	/* fill the keybuf */
	for (r = 0; r < 8; r++) {
	if (dk&1)
	rx51_kp_fill((c*8)+r, mods);
	dk = dk >> 1;
	}

	}

	}

	/* localy unlock twl4030 i2c bus */
	test_and_clear_bit(0, &twl_i2c_lock);

	return (KEYBUF_SIZE + keybuf_tail - keybuf_head)%KEYBUF_SIZE;
	}

	/*
	* Routine: rx51_kp_getc
	* Description: Get last pressed key (from buffer).
	*/
	int rx51_kp_getc(struct stdio_dev *sdev)
	{
	keybuf_head %= KEYBUF_SIZE;
	while (!rx51_kp_tstc(sdev))
	WATCHDOG_RESET();
	return keybuf[keybuf_head++];
	}

	/*
	* Routine: board_mmc_init
	* Description: Initialize mmc devices.
	*/
	int board_mmc_init(bd_t *bis)
	{
	omap_mmc_init(0, 0, 0, -1, -1);
	omap_mmc_init(1, 0, 0, -1, -1);
	return 0;
	}

	void board_mmc_power_init(void)
	{
	twl4030_power_mmc_init(0);
	twl4030_power_mmc_init(1);
	}