board/keymile/km82xx/km82xx.c

/*
 * (C) Copyright 2007 - 2008
 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <mpc8260.h>
#include <ioports.h>
#include <malloc.h>
#include <asm/io.h>

#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#endif

#include <i2c.h>
#include "../common/common.h"

/*
 * I/O Port configuration table
 *
 * if conf is 1, then that port pin will be configured at boot time
 * according to the five values podr/pdir/ppar/psor/pdat for that entry
 */
const iop_conf_t iop_conf_tab[4][32] = {

	/* Port A */
	{	/*	      conf	ppar psor pdir podr pdat */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA31	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA30	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA29	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA28	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA27	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA26	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA25	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA24	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA23	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA22	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA21	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA20	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA19	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA18	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA17	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA16	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA15	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA14	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA13	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA12	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA11	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA10	     */
		{ 1,		 1,   0,   1,	0,   0 }, /* PA9 SMC2 TxD    */
		{ 1,		 1,   0,   0,	0,   0 }, /* PA8 SMC2 RxD    */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA7	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA6	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA5	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA4	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA3	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA2	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PA1	     */
		{ 0,		 0,   0,   0,	0,   0 }  /* PA0	     */
	},

	/* Port B */
	{	/*	      conf	ppar psor pdir podr pdat */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB31	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB30	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB29	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB28	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB27	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB26	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB25	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB24	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB23	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB22	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB21	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB20	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB19	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PB18	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }  /* non-existent    */
	},

	/* Port C */
	{	/*	      conf	ppar psor pdir podr pdat */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC31	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC30	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC29	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC28	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC27	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC26	     */
		{ 1,		 1,   0,   0,	0,   0 }, /* PC25 RxClk      */
		{ 1,		 1,   0,   0,	0,   0 }, /* PC24 TxClk      */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC23	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC22	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC21	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC20	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC19	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC18	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC17	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC16	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC15	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC14	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC13	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC12	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC11	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC10	     */
		{ 1,		 1,   0,   0,	0,   0 }, /* PC9  SCC4: CTS  */
		{ 1,		 1,   0,   0,	0,   0 }, /* PC8  SCC4: CD   */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC7	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC6	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC5	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC4	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC3	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC2	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC1	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PC0	     */
	},

	/* Port D */
	{	/*	      conf	ppar psor pdir podr pdat */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD31	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD30	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD29	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD28	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD27	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD26	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD25	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD24	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD23	     */
		{ 1,		 1,   0,   0,	0,   0 }, /* PD22 SCC4: RXD  */
		{ 1,		 1,   0,   1,	0,   0 }, /* PD21 SCC4: TXD  */
		{ 1,		 1,   0,   1,	0,   0 }, /* PD20 SCC4: RTS  */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD19	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD18	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD17	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD16	     */
#if defined(CONFIG_HARD_I2C)
		{ 1,		 1,   1,   0,	1,   0 }, /* PD15 I2C SDA    */
		{ 1,		 1,   1,   0,	1,   0 }, /* PD14 I2C SCL    */
#else
		{ 1,		 0,   0,   0,	1,   1 }, /* PD15	     */
		{ 1,		 0,   0,   1,	1,   1 }, /* PD14	     */
#endif
		{ 0,		 0,   0,   0,	0,   0 }, /* PD13	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD12	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD11	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD10	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD9	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD8	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD7	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD6	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD5	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* PD4	     */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }, /* non-existent    */
		{ 0,		 0,   0,   0,	0,   0 }  /* non-existent    */
	}
};

/*
 * Try SDRAM initialization with P/LSDMR=sdmr and ORx=orx
 *
 * This routine performs standard 8260 initialization sequence
 * and calculates the available memory size. It may be called
 * several times to try different SDRAM configurations on both
 * 60x and local buses.
 */
static long int try_init(memctl8260_t *memctl, ulong sdmr,
				  ulong orx, uchar *base)
{
	uchar c = 0xff;
	ulong maxsize, size;
	int i;

	/*
	 * We must be able to test a location outsize the maximum legal size
	 * to find out THAT we are outside; but this address still has to be
	 * mapped by the controller. That means, that the initial mapping has
	 * to be (at least) twice as large as the maximum expected size.
	 */
	maxsize = (1 + (~orx | 0x7fff))/* / 2*/;

	out_be32(&memctl->memc_or1, orx);

	/*
	 * Quote from 8260 UM (10.4.2 SDRAM Power-On Initialization, 10-35):
	 *
	 * "At system reset, initialization software must set up the
	 *  programmable parameters in the memory controller banks registers
	 *  (ORx, BRx, P/LSDMR). After all memory parameters are configured,
	 *  system software should execute the following initialization sequence
	 *  for each SDRAM device.
	 *
	 *  1. Issue a PRECHARGE-ALL-BANKS command
	 *  2. Issue eight CBR REFRESH commands
	 *  3. Issue a MODE-SET command to initialize the mode register
	 *
	 *  The initial commands are executed by setting P/LSDMR[OP] and
	 *  accessing the SDRAM with a single-byte transaction."
	 *
	 * The appropriate BRx/ORx registers have already been set when we
	 * get here. The SDRAM can be accessed at the address
	 * CONFIG_SYS_SDRAM_BASE.
	 */

	out_be32(&memctl->memc_psdmr, sdmr | PSDMR_OP_PREA);
	out_8(base, c);

	out_be32(&memctl->memc_psdmr, sdmr | PSDMR_OP_CBRR);
	for (i = 0; i < 8; i++)
		out_8(base, c);

	out_be32(&memctl->memc_psdmr, sdmr | PSDMR_OP_MRW);
	/* setting MR on address lines */
	out_8((uchar *)(base + CONFIG_SYS_MRS_OFFS), c);

	out_be32(&memctl->memc_psdmr, sdmr | PSDMR_OP_NORM | PSDMR_RFEN);
	out_8(base, c);

	size = get_ram_size((long *)base, maxsize);
	out_be32(&memctl->memc_or1, orx | ~(size - 1));

	return size;
}

#ifdef CONFIG_SYS_SDRAM_LIST

/*
 * If CONFIG_SYS_SDRAM_LIST is defined, we cycle through all SDRAM
 * configurations therein (should be from high to lower) to find the
 * one actually matching the current configuration.
 * CONFIG_SYS_PSDMR and CONFIG_SYS_OR1 will contain the base values which are
 * common among all possible configurations; values in CONFIG_SYS_SDRAM_LIST
 * (defined as the initialization value for the array of struct sdram_conf_s)
 * will then be ORed with such base values.
 */

struct sdram_conf_s {
	ulong size;
	int or1;
	int psdmr;
};

static struct sdram_conf_s sdram_conf[] = CONFIG_SYS_SDRAM_LIST;

static long probe_sdram(memctl8260_t *memctl)
{
	int n = 0;
	long psize = 0;

	for (n = 0; n < ARRAY_SIZE(sdram_conf); psize = 0, n++) {
		psize = try_init(memctl,
			CONFIG_SYS_PSDMR | sdram_conf[n].psdmr,
			CONFIG_SYS_OR1 | sdram_conf[n].or1,
			(uchar *) CONFIG_SYS_SDRAM_BASE);
		debug("Probing %ld bytes returned %ld\n",
			sdram_conf[n].size, psize);
		if (psize == sdram_conf[n].size)
			break;
	}
	return psize;
}

#else /* CONFIG_SYS_SDRAM_LIST */

static long probe_sdram(memctl8260_t *memctl)
{
	return try_init(memctl, CONFIG_SYS_PSDMR, CONFIG_SYS_OR1,
					(uchar *) CONFIG_SYS_SDRAM_BASE);
}
#endif /* CONFIG_SYS_SDRAM_LIST */


phys_size_t initdram(int board_type)
{
	immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	memctl8260_t *memctl = &immap->im_memctl;

	long psize;

	out_8(&memctl->memc_psrt, CONFIG_SYS_PSRT);
	out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);

#ifndef CONFIG_SYS_RAMBOOT
	/* 60x SDRAM setup:
	 */
	psize = probe_sdram(memctl);
#endif /* CONFIG_SYS_RAMBOOT */

	icache_enable();

	return psize;
}

int checkboard(void)
{
#if defined(CONFIG_MGCOGE)
	puts("Board: Keymile mgcoge");
#else
	puts("Board: Keymile mgcoge3ne");
#endif
	if (ethernet_present())
		puts(" with PIGGY.");
	puts("\n");
	return 0;
}

int last_stage_init(void)
{
	struct bfticu_iomap *base =
		(struct bfticu_iomap *)CONFIG_SYS_FPGA_BASE;
	u8 dip_switch;

	dip_switch = in_8(&base->mswitch);
	dip_switch &= BFTICU_DIPSWITCH_MASK;
	/* dip switch 'full reset' or 'db erase' */
	if (dip_switch & 0x1 || dip_switch & 0x2) {
		/* start bootloader */
		puts("DIP:   Enabled\n");
		setenv("actual_bank", "0");
	}
	set_km_env();
	return 0;
}

#ifdef CONFIG_MGCOGE3NE
static void set_pin(int state, unsigned long mask);

/*
 * For mgcoge3ne boards, the mgcoge3un control is controlled from
 * a GPIO line on the PPC CPU. If bobcatreset is set the line
 * will toggle once what forces the mgocge3un part to restart
 * immediately.
 */
static void handle_mgcoge3un_reset(void)
{
	char *bobcatreset = getenv("bobcatreset");
	if (bobcatreset) {
		if (strcmp(bobcatreset, "true") == 0) {
			puts("Forcing bobcat reset\n");
			set_pin(0, 0x00000004);	/* clear PD29 to reset arm */
			udelay(1000);
			set_pin(1, 0x00000004);
		} else
			set_pin(1, 0x00000004);	/* set PD29 to not reset arm */
	}
}
#endif

int ethernet_present(void)
{
	struct km_bec_fpga *base =
		(struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;

	return in_8(&base->bprth) & PIGGY_PRESENT;
}

/*
 * Early board initalization.
 */
int board_early_init_r(void)
{
	struct km_bec_fpga *base =
		(struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;

	/* setup the UPIOx */
	/* General Unit Reset disabled, Flash Bank enabled, UnitLed on */
	out_8(&base->oprth, (WRG_RESET | H_OPORTS_14 | WRG_LED));
	/* SCC4 enable, halfduplex, FCC1 powerdown */
	out_8(&base->oprtl, (H_OPORTS_SCC4_ENA | H_OPORTS_SCC4_FD_ENA |
		H_OPORTS_FCC1_PW_DWN));

#ifdef CONFIG_MGCOGE3NE
	handle_mgcoge3un_reset();
#endif
	return 0;
}

int hush_init_var(void)
{
	ivm_read_eeprom();
	return 0;
}

#define SDA_MASK	0x00010000
#define SCL_MASK	0x00020000

static void set_pin(int state, unsigned long mask)
{
	ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);

	if (state)
		setbits_be32(&iop->pdat, mask);
	else
		clrbits_be32(&iop->pdat, mask);

	setbits_be32(&iop->pdir, mask);
}

static int get_pin(unsigned long mask)
{
	ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);

	clrbits_be32(&iop->pdir, mask);
	return 0 != (in_be32(&iop->pdat) & mask);
}

void set_sda(int state)
{
	set_pin(state, SDA_MASK);
}

void set_scl(int state)
{
	set_pin(state, SCL_MASK);
}

int get_sda(void)
{
	return get_pin(SDA_MASK);
}

int get_scl(void)
{
	return get_pin(SCL_MASK);
}

#if defined(CONFIG_HARD_I2C)
static void setports(int gpio)
{
	ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);

	if (gpio) {
		clrbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
		clrbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
	} else {
		setbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
		clrbits_be32(&iop->pdir, (SDA_MASK | SCL_MASK));
		setbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
	}
}
#endif
#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
void ft_board_setup(void *blob, bd_t *bd)
{
	ft_cpu_setup(blob, bd);
}
#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */