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/*
* Bluewater Systems Snapper 9260/9G20 modules
*
* (C) Copyright 2011 Bluewater Systems
* Author: Andre Renaud <andre@bluewatersys.com>
* Author: Ryan Mallon <ryan@bluewatersys.com>
*
* 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 <asm/io.h>
#include <asm/arch/at91sam9260_matrix.h>
#include <asm/arch/at91sam9_smc.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/at91_rstc.h>
#include <asm/arch/gpio.h>
#include <net.h>
#include <netdev.h>
#include <i2c.h>
#include <pca953x.h>
DECLARE_GLOBAL_DATA_PTR;
/* IO Expander pins */
#define IO_EXP_ETH_RESET (0 << 1)
#define IO_EXP_ETH_POWER (1 << 1)
static void macb_hw_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
struct at91_rstc *rstc = (struct at91_rstc *)ATMEL_BASE_RSTC;
unsigned long erstl;
/* Enable clock */
writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
/* Disable pull-ups to prevent PHY going into test mode */
writel(pin_to_mask(AT91_PIN_PA14) |
pin_to_mask(AT91_PIN_PA15) |
pin_to_mask(AT91_PIN_PA18),
&pioa->pudr);
/* Power down ethernet */
pca953x_set_dir(0x28, IO_EXP_ETH_POWER, PCA953X_DIR_OUT);
pca953x_set_val(0x28, IO_EXP_ETH_POWER, 1);
/* Hold ethernet in reset */
pca953x_set_dir(0x28, IO_EXP_ETH_RESET, PCA953X_DIR_OUT);
pca953x_set_val(0x28, IO_EXP_ETH_RESET, 0);
/* Enable ethernet power */
pca953x_set_val(0x28, IO_EXP_ETH_POWER, 0);
/* Need to reset PHY -> 500ms reset */
erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(13) |
AT91_RSTC_MR_URSTEN, &rstc->mr);
writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr);
/* Wait for end hardware reset */
while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL))
;
/* Restore NRST value */
writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN, &rstc->mr);
/* Bring the ethernet out of reset */
pca953x_set_val(0x28, IO_EXP_ETH_RESET, 1);
/* The phy internal reset take 21ms */
udelay(21 * 1000);
/* Re-enable pull-up */
writel(pin_to_mask(AT91_PIN_PA14) |
pin_to_mask(AT91_PIN_PA15) |
pin_to_mask(AT91_PIN_PA18),
&pioa->puer);
at91_macb_hw_init();
}
static void nand_hw_init(void)
{
struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
unsigned long csa;
/* Enable CS3 as NAND/SmartMedia */
csa = readl(&matrix->ebicsa);
csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
writel(csa, &matrix->ebicsa);
/* Configure SMC CS3 for NAND/SmartMedia */
writel(AT91_SMC_SETUP_NWE(2) | AT91_SMC_SETUP_NCS_WR(0) |
AT91_SMC_SETUP_NRD(2) | AT91_SMC_SETUP_NCS_RD(0),
&smc->cs[3].setup);
writel(AT91_SMC_PULSE_NWE(4) | AT91_SMC_PULSE_NCS_WR(4) |
AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(4),
&smc->cs[3].pulse);
writel(AT91_SMC_CYCLE_NWE(7) | AT91_SMC_CYCLE_NRD(7),
&smc->cs[3].cycle);
writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
AT91_SMC_MODE_EXNW_DISABLE |
AT91_SMC_MODE_DBW_8 |
AT91_SMC_MODE_TDF_CYCLE(3),
&smc->cs[3].mode);
/* Configure RDY/BSY */
at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
/* Enable NandFlash */
at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
}
int board_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
/* Enable PIO clocks */
writel((1 << ATMEL_ID_PIOA) |
(1 << ATMEL_ID_PIOB) |
(1 << ATMEL_ID_PIOC), &pmc->pcer);
/* The mach-type is the same for both Snapper 9260 and 9G20 */
gd->bd->bi_arch_number = MACH_TYPE_SNAPPER_9260;
/* Address of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
/* Initialise peripherals */
at91_seriald_hw_init();
i2c_set_bus_num(0);
nand_hw_init();
macb_hw_init();
return 0;
}
int board_eth_init(bd_t *bis)
{
return macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, 0x1f);
}
int dram_init(void)
{
gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
CONFIG_SYS_SDRAM_SIZE);
return 0;
}
void reset_phy(void)
{
}
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