arm: at91: Add gardena-gateway-at91sam support

The GARDENA smart Gateway boards are equipped with an Atmel / Microchip
AT91SAM9G25 SoC and with 128 MiB of RAM and 256 MiB of NAND storage.
This patch adds support for this board including SPL support. Therefore
the AT91Boostrap is not needed on this platform any more.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Andreas Bießmann <andreas@biessmann.org>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Heiko Schocher <hs@denx.de>

1 files changed, 135 insertions, 0 deletions

diff --git a/board/gardena/smart-gateway-at91sam/spl.c b/board/gardena/smart-gateway-at91sam/spl.c
new file mode 100644
index 0000000000..3ab6760df7
--- /dev/null
+++ b/board/gardena/smart-gateway-at91sam/spl.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Atmel Corporation
+ * Copyright (C) 2019 Stefan Roese <sr@denx.de>
+ */
+
+#include <common.h>
+#include <nand.h>
+#include <spl.h>
+#include <asm/arch/at91sam9x5_matrix.h>
+#include <asm/arch/at91sam9_smc.h>
+#include <asm/arch/atmel_mpddrc.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/gpio.h>
+
+static void at91sam9x5ek_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 */
+	csa = readl(&matrix->ebicsa);
+	csa |= AT91_MATRIX_EBI_CS3A_SMC_SMARTMEDIA;
+
+	/* NAND flash on D16 */
+	csa |= AT91_MATRIX_NFD0_ON_D16;
+
+	/* Configure IO drive */
+	csa &= ~AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
+
+	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(5) |
+	       AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(6),
+	       &smc->cs[3].pulse);
+	writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(6),
+	       &smc->cs[3].cycle);
+	writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
+	       AT91_SMC_MODE_EXNW_DISABLE |
+#ifdef CONFIG_SYS_NAND_DBW_16
+	       AT91_SMC_MODE_DBW_16 |
+#else /* CONFIG_SYS_NAND_DBW_8 */
+	       AT91_SMC_MODE_DBW_8 |
+#endif
+	       AT91_SMC_MODE_TDF_CYCLE(1),
+	       &smc->cs[3].mode);
+
+	at91_periph_clk_enable(ATMEL_ID_PIOCD);
+
+	/* 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);
+
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 0, 1);	/* NAND OE */
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 1, 1);	/* NAND WE */
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 2, 1);	/* NAND ALE */
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 3, 1);	/* NAND CLE */
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 6, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 7, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 8, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 9, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 10, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 11, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 12, 1);
+	at91_pio3_set_a_periph(AT91_PIO_PORTD, 13, 1);
+}
+
+void at91_spl_board_init(void)
+{
+	at91sam9x5ek_nand_hw_init();
+}
+
+static void ddr2_conf(struct atmel_mpddrc_config *ddr2)
+{
+	ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
+
+	ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+		    ATMEL_MPDDRC_CR_NR_ROW_13 |
+		    ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
+		    ATMEL_MPDDRC_CR_NB_8BANKS |
+		    ATMEL_MPDDRC_CR_DECOD_INTERLEAVED);
+
+	ddr2->rtr = 0x411;
+
+	ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
+		      8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
+
+	ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
+		      200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
+		      19 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
+		      18 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
+
+	ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
+		      3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
+		      7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
+}
+
+void mem_init(void)
+{
+	struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	struct atmel_mpddrc_config ddr2;
+	unsigned long csa;
+
+	ddr2_conf(&ddr2);
+
+	/* Enable DDR2 clock */
+	writel(AT91_PMC_DDR, &pmc->scer);
+
+	/* Chip select 1 is for DDR2/SDRAM */
+	csa = readl(&matrix->ebicsa);
+	csa |= AT91_MATRIX_EBI_CS1A_SDRAMC;
+	csa &= ~AT91_MATRIX_EBI_DBPU_OFF;
+	csa |= AT91_MATRIX_EBI_DBPD_OFF;
+	csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
+	writel(csa, &matrix->ebicsa);
+
+	/* DDRAM2 Controller initialize */
+	ddr2_init(ATMEL_BASE_DDRSDRC, ATMEL_BASE_CS1, &ddr2);
+}