at91: Add support for taskit AT91SAM9G20 boards.

This adds support for the AT91SAM9G20 boards by taskit GmbH.
Both boards, Stamp9G20 and PortuxG20, are integrated in one
file. PortuxG20 is basically a SBC built around the Stamp9G20.

Signed-off-by: Markus Hubig <mhubig@imko.de>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.deve@googlemail.com>

1 files changed, 191 insertions, 0 deletions

diff --git a/board/taskit/stamp9g20/stamp9g20.c b/board/taskit/stamp9g20/stamp9g20.c
new file mode 100644
index 0000000..5e07bf8
--- /dev/null
+++ b/board/taskit/stamp9g20/stamp9g20.c
@@ -0,0 +1,191 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * Achim Ehrlich <aehrlich@taskit.de>
+ * taskit GmbH <www.taskit.de>
+ *
+ * (C) Copyright 2012-
+ * Markus Hubig <mhubig@imko.de>
+ * IMKO GmbH <www.imko.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 <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 <watchdog.h>
+
+#ifdef CONFIG_MACB
+# include <net.h>
+# include <netdev.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void stamp9G20_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;
+
+	/* Assign CS3 to NAND/SmartMedia Interface */
+	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(1) | AT91_SMC_SETUP_NCS_WR(0) |
+		AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
+		&smc->cs[3].setup);
+	writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(3) |
+		AT91_SMC_PULSE_NRD(3) | AT91_SMC_PULSE_NCS_RD(3),
+		&smc->cs[3].pulse);
+	writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5),
+		&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(2),
+		&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);
+}
+
+#ifdef CONFIG_MACB
+static void stamp9G20_macb_hw_init(void)
+{
+	struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
+	struct at91_rstc *rstc = (struct at91_rstc *)ATMEL_BASE_RSTC;
+	unsigned long erstl;
+
+	/* Enable the PHY Chip via PA26 on the Stamp 2 Adaptor */
+	at91_set_gpio_output(AT91_PIN_PA26, 0);
+
+	/*
+	 * Disable pull-up on:
+	 *	RXDV (PA17) => PHY normal mode (not Test mode)
+	 *	ERX0 (PA14) => PHY ADDR0
+	 *	ERX1 (PA15) => PHY ADDR1
+	 *	ERX2 (PA25) => PHY ADDR2
+	 *	ERX3 (PA26) => PHY ADDR3
+	 *	ECRS (PA28) => PHY ADDR4  => PHYADDR = 0x0
+	 *
+	 * PHY has internal pull-down
+	 */
+	writel(pin_to_mask(AT91_PIN_PA14) |
+		pin_to_mask(AT91_PIN_PA15) |
+		pin_to_mask(AT91_PIN_PA17) |
+		pin_to_mask(AT91_PIN_PA18) |
+		pin_to_mask(AT91_PIN_PA28),
+		&pioa->pudr);
+
+	erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
+
+	/* Need to reset PHY -> 500ms reset */
+	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 of hardware reset */
+	unsigned long start = get_timer(0);
+	unsigned long timeout = 1000; /* 1000ms */
+
+	while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL)) {
+
+		/* avoid shutdown by watchdog */
+		WATCHDOG_RESET();
+		mdelay(10);
+
+		/* timeout for not getting stuck in an endless loop */
+		if (get_timer(start) >= timeout) {
+			puts("*** ERROR: Timeout waiting for PHY reset!\n");
+			break;
+		};
+	};
+
+	/* Restore NRST value */
+	writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN,
+		&rstc->mr);
+
+	/* Re-enable pull-up */
+	writel(pin_to_mask(AT91_PIN_PA14) |
+		pin_to_mask(AT91_PIN_PA15) |
+		pin_to_mask(AT91_PIN_PA17) |
+		pin_to_mask(AT91_PIN_PA18) |
+		pin_to_mask(AT91_PIN_PA28),
+		&pioa->puer);
+
+	/* Initialize EMAC=MACB hardware */
+	at91_macb_hw_init();
+}
+#endif /* CONFIG_MACB */
+
+int board_early_init_f(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	/* Enable clocks for all PIOs */
+	writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
+		(1 << ATMEL_ID_PIOC), &pmc->pcer);
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Adress of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	/* Enable the serial interface */
+	at91_set_gpio_output(AT91_PIN_PC9, 1);
+	at91_seriald_hw_init();
+
+	stamp9G20_nand_hw_init();
+#ifdef CONFIG_MACB
+	stamp9G20_macb_hw_init();
+#endif
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size(
+		(void *)CONFIG_SYS_SDRAM_BASE,
+		CONFIG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+#ifdef CONFIG_MACB
+int board_eth_init(bd_t *bis)
+{
+	return macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, 0x00);
+}
+#endif /* CONFIG_MACB */