add support for using spl code on at91sam9260 and at91sam9g45
based boards.
Signed-off-by: Heiko Schocher <h...@denx.de>
---
Changes in v2: None
arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c | 22 +++
arch/arm/cpu/arm926ejs/at91/clock.c | 60 +++++++
arch/arm/cpu/armv7/at91/clock.c | 27 +++
arch/arm/cpu/at91-common/Makefile | 1 +
arch/arm/cpu/at91-common/sdram.c | 77 +++++++++
arch/arm/cpu/at91-common/spl.c | 185 +++++++++++++++------
arch/arm/include/asm/arch-at91/at91_common.h | 4 +
arch/arm/include/asm/arch-at91/at91_pmc.h | 5 +-
arch/arm/include/asm/arch-at91/at91sam9260.h | 1 +
.../arm/include/asm/arch-at91/at91sam9260_matrix.h | 5 +
arch/arm/include/asm/arch-at91/at91sam9_sdramc.h | 22 ++-
11 files changed, 359 insertions(+), 50 deletions(-)
create mode 100644 arch/arm/cpu/at91-common/sdram.c
diff --git a/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
b/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
index cae4abc..7a7fd7d 100644
--- a/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
+++ b/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
@@ -8,8 +8,10 @@
#include <common.h>
#include <asm/io.h>
+#include <asm/arch/at91sam9260_matrix.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91sam9_sdramc.h>
#include <asm/arch/gpio.h>
/*
@@ -207,3 +209,23 @@ void at91_mci_hw_init(void)
#endif
}
#endif
+
+void at91_sdram_hw_init(void)
+{
+ at91_set_a_periph(AT91_PIO_PORTC, 16, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 17, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 18, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 19, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 20, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 21, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 22, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 23, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 24, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 25, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 26, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 27, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 28, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 29, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 30, 0);
+ at91_set_a_periph(AT91_PIO_PORTC, 31, 0);
+}
diff --git a/arch/arm/cpu/arm926ejs/at91/clock.c
b/arch/arm/cpu/arm926ejs/at91/clock.c
index 31315b5..f363982 100644
--- a/arch/arm/cpu/arm926ejs/at91/clock.c
+++ b/arch/arm/cpu/arm926ejs/at91/clock.c
@@ -187,3 +187,63 @@ int at91_clock_init(unsigned long main_clock)
return 0;
}
+
+#if !defined(AT91_PLL_LOCK_TIMEOUT)
+#define AT91_PLL_LOCK_TIMEOUT 1000000
+#endif
+
+void at91_plla_init(u32 pllar)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ int timeout = AT91_PLL_LOCK_TIMEOUT;
+
+ writel(pllar, &pmc->pllar);
+ while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) {
+ timeout--;
+ if (timeout == 0)
+ break;
+ }
+}
+void at91_pllb_init(u32 pllbr)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ int timeout = AT91_PLL_LOCK_TIMEOUT;
+
+ writel(pllbr, &pmc->pllbr);
+ while (!(readl(&pmc->sr) & (AT91_PMC_LOCKB | AT91_PMC_MCKRDY))) {
+ timeout--;
+ if (timeout == 0)
+ break;
+ }
+}
+
+void at91_mck_init(u32 mckr)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ int timeout = AT91_PLL_LOCK_TIMEOUT;
+ u32 tmp;
+
+ tmp = readl(&pmc->mckr);
+ tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
+ AT91_PMC_MCKR_MDIV_MASK |
+ AT91_PMC_MCKR_PLLADIV_MASK |
+ AT91_PMC_MCKR_CSS_MASK);
+ tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
+ AT91_PMC_MCKR_MDIV_MASK |
+ AT91_PMC_MCKR_PLLADIV_MASK |
+ AT91_PMC_MCKR_CSS_MASK);
+ writel(tmp, &pmc->mckr);
+
+ while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) {
+ timeout--;
+ if (timeout == 0)
+ break;
+ }
+}
+
+void at91_periph_clk_enable(int id)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+ writel(1 << id, &pmc->pcer);
+}
diff --git a/arch/arm/cpu/armv7/at91/clock.c b/arch/arm/cpu/armv7/at91/clock.c
index 36ed4a6..363081a 100644
--- a/arch/arm/cpu/armv7/at91/clock.c
+++ b/arch/arm/cpu/armv7/at91/clock.c
@@ -111,6 +111,33 @@ int at91_clock_init(unsigned long main_clock)
return 0;
}
+void at91_plla_init(u32 pllar)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+ writel(pllar, &pmc->pllar);
+ while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY)))
+ ;
+}
+
+void at91_mck_init(u32 mckr)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ u32 tmp;
+
+ tmp = readl(&pmc->mckr);
+ tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
+ AT91_PMC_MCKR_MDIV_MASK |
+ AT91_PMC_MCKR_PLLADIV_2);
+ tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
+ AT91_PMC_MCKR_MDIV_MASK |
+ AT91_PMC_MCKR_PLLADIV_2);
+ writel(tmp, &pmc->mckr);
+
+ while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
+ ;
+}
+
void at91_periph_clk_enable(int id)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
diff --git a/arch/arm/cpu/at91-common/Makefile
b/arch/arm/cpu/at91-common/Makefile
index f62863a..5bdfb6a 100644
--- a/arch/arm/cpu/at91-common/Makefile
+++ b/arch/arm/cpu/at91-common/Makefile
@@ -10,6 +10,7 @@
obj-$(CONFIG_AT91_WANTS_COMMON_PHY) += phy.o
ifneq ($(CONFIG_SPL_BUILD),)
+obj-$(CONFIG_AT91SAM9G20) += sdram.o
obj-$(CONFIG_AT91SAM9M10G45) += mpddrc.o
obj-$(CONFIG_SAMA5D3) += mpddrc.o
obj-y += spl.o
diff --git a/arch/arm/cpu/at91-common/sdram.c b/arch/arm/cpu/at91-common/sdram.c
new file mode 100644
index 0000000..5758b06
--- /dev/null
+++ b/arch/arm/cpu/at91-common/sdram.c
@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2014
+ * Heiko Schocher, DENX Software Engineering, h...@denx.de.
+ *
+ * Based on:
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stel...@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/gpio.h>
+
+int sdramc_initialize(unsigned int sdram_address, const struct sdramc_reg *p)
+{
+ struct sdramc_reg *reg = (struct sdramc_reg *)ATMEL_BASE_SDRAMC;
+ unsigned int i;
+
+ /* SDRAM feature must be in the configuration register */
+ writel(p->cr, ®->cr);
+
+ /* The SDRAM memory type must be set in the Memory Device Register */
+ writel(p->mdr, ®->mdr);
+
+ /*
+ * The minimum pause of 200 us is provided to precede any single
+ * toggle
+ */
+ for (i = 0; i < 1000; i++)
+ ;
+
+ /* A NOP command is issued to the SDRAM devices */
+ writel(AT91_SDRAMC_MODE_NOP, ®->mr);
+ writel(0x00000000, sdram_address);
+
+ /* An All Banks Precharge command is issued to the SDRAM devices */
+ writel(AT91_SDRAMC_MODE_PRECHARGE, ®->mr);
+ writel(0x00000000, sdram_address);
+
+ for (i = 0; i < 10000; i++)
+ ;
+
+ /* Eight auto-refresh cycles are provided */
+ for (i = 0; i < 8; i++) {
+ writel(AT91_SDRAMC_MODE_REFRESH, ®->mr);
+ writel(0x00000001 + i, sdram_address + 4 + 4 * i);
+ }
+
+ /*
+ * A Mode Register set (MRS) cyscle is issued to program the
+ * SDRAM parameters(TCSR, PASR, DS)
+ */
+ writel(AT91_SDRAMC_MODE_LMR, ®->mr);
+ writel(0xcafedede, sdram_address + 0x24);
+
+ /*
+ * The application must go into Normal Mode, setting Mode
+ * to 0 in the Mode Register and perform a write access at
+ * any location in the SDRAM.
+ */
+ writel(AT91_SDRAMC_MODE_NORMAL, ®->mr);
+ writel(0x00000000, sdram_address); /* Perform Normal mode */
+
+ /*
+ * Write the refresh rate into the count field in the SDRAMC
+ * Refresh Timer Rgister.
+ */
+ writel(p->tr, ®->tr);
+
+ return 0;
+}
diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c
index 674a470..5c9a3ad 100644
--- a/arch/arm/cpu/at91-common/spl.c
+++ b/arch/arm/cpu/at91-common/spl.c
@@ -8,11 +8,18 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/at91_common.h>
+#if !defined(CONFIG_SAMA5D3)
+#include <asm/arch/at91sam9_matrix.h>
+#endif
+#include <asm/arch/at91_pit.h>
#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_rstc.h>
#include <asm/arch/at91_wdt.h>
#include <asm/arch/clk.h>
#include <spl.h>
+DECLARE_GLOBAL_DATA_PTR;
+
static void at91_disable_wdt(void)
{
struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
@@ -20,6 +27,33 @@ static void at91_disable_wdt(void)
writel(AT91_WDT_MR_WDDIS, &wdt->mr);
}
+u32 spl_boot_device(void)
+{
+#ifdef CONFIG_SYS_USE_MMC
+ return BOOT_DEVICE_MMC1;
+#elif CONFIG_SYS_USE_NANDFLASH
+ return BOOT_DEVICE_NAND;
+#elif CONFIG_SYS_USE_SERIALFLASH
+ return BOOT_DEVICE_SPI;
+#endif
+ return BOOT_DEVICE_NONE;
+}
+
+u32 spl_boot_mode(void)
+{
+ switch (spl_boot_device()) {
+#ifdef CONFIG_SYS_USE_MMC
+ case BOOT_DEVICE_MMC1:
+ return MMCSD_MODE_FS;
+ break;
+#endif
+ case BOOT_DEVICE_NONE:
+ default:
+ hang();
+ }
+}
+
+#if defined(CONFIG_SAMA5D3)
static void switch_to_main_crystal_osc(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
@@ -57,77 +91,134 @@ static void switch_to_main_crystal_osc(void)
writel(tmp, &pmc->mor);
}
-void at91_plla_init(u32 pllar)
+void s_init(void)
{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ switch_to_main_crystal_osc();
- writel(pllar, &pmc->pllar);
- while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY)))
- ;
-}
+ /* disable watchdog */
+ at91_disable_wdt();
-void at91_mck_init(u32 mckr)
-{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
- u32 tmp;
+ /* PMC configuration */
+ at91_pmc_init();
- tmp = readl(&pmc->mckr);
- tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
- AT91_PMC_MCKR_MDIV_MASK |
- AT91_PMC_MCKR_PLLADIV_2);
- tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
- AT91_PMC_MCKR_MDIV_MASK |
- AT91_PMC_MCKR_PLLADIV_2);
- writel(tmp, &pmc->mckr);
+ at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
- while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
- ;
-}
+ timer_init();
+ board_early_init_f();
-u32 spl_boot_device(void)
+ preloader_console_init();
+
+ mem_init();
+}
+#else
+static void enable_ext_reset(void)
{
-#ifdef CONFIG_SYS_USE_MMC
- return BOOT_DEVICE_MMC1;
-#elif CONFIG_SYS_USE_NANDFLASH
- return BOOT_DEVICE_NAND;
-#elif CONFIG_SYS_USE_SERIALFLASH
- return BOOT_DEVICE_SPI;
-#endif
- return BOOT_DEVICE_NONE;
+ struct at91_rstc *rstc = (struct at91_rstc *)ATMEL_BASE_RSTC;
+
+ writel(AT91_RSTC_KEY | AT91_RSTC_MR_URSTEN, &rstc->mr);
}
-u32 spl_boot_mode(void)
+#if defined(CONFIG_ATMEL_MATRIX_INIT)
+static void matrix_init(void)
{
- switch (spl_boot_device()) {
-#ifdef CONFIG_SYS_USE_MMC
- case BOOT_DEVICE_MMC1:
- return MMCSD_MODE_FS;
- break;
+ struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+
+ writel((readl(&mat->scfg[3]) & (~AT91_MATRIX_SLOT_CYCLE))
+ | AT91_MATRIX_SLOT_CYCLE_(0x40),
+ &mat->scfg[3]);
+}
#endif
- case BOOT_DEVICE_NONE:
- default:
- hang();
+
+void lowlevel_clock_init(void)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+ if (!(readl(&pmc->sr) & AT91_PMC_MOSCS)) {
+ /* Enable Main Oscillator */
+ writel(AT91_PMC_MOSCS | (0x40 << 8), &pmc->mor);
+
+ /* Wait until Main Oscillator is stable */
+ while (!(readl(&pmc->sr) & AT91_PMC_MOSCS))
+ ;
}
+
+ /* After stabilization, switch to Main Oscillator */
+ if ((readl(&pmc->mckr) & AT91_PMC_CSS) == AT91_PMC_CSS_SLOW) {
+ unsigned long tmp;
+
+ tmp = readl(&pmc->mckr);
+ tmp &= ~AT91_PMC_CSS;
+ tmp |= AT91_PMC_CSS_MAIN;
+ writel(tmp, &pmc->mckr);
+ while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
+ ;
+
+ tmp &= ~AT91_PMC_PRES;
+ tmp |= AT91_PMC_PRES_1;
+ writel(tmp, &pmc->mckr);
+ while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
+ ;
+ }
+
+ return;
}
-void s_init(void)
+void __weak at91_spl_board_init(void)
{
- switch_to_main_crystal_osc();
+}
- /* disable watchdog */
+void spl_board_init(void)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+ lowlevel_clock_init();
at91_disable_wdt();
- /* PMC configuration */
- at91_pmc_init();
+ /*
+ * At this stage the main oscillator is supposed to be enabled
+ * PCK = MCK = MOSC
+ */
+ writel(0x00, &pmc->pllicpr);
- at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
+ /* Configure PLLA = MOSC * (PLL_MULA + 1) / PLL_DIVA */
+ at91_plla_init(CONFIG_SYS_AT91_PLLA);
- timer_init();
+ /* PCK = PLLA = 2 * MCK */
+ at91_mck_init(CONFIG_SYS_MCKR);
- board_early_init_f();
+ /* Switch MCK on PLLA output */
+ at91_mck_init(CONFIG_SYS_MCKR_CSS);
+
+#if defined(CONFIG_SYS_AT91_PLLB)
+ /* Configure PLLB */
+ at91_pllb_init(CONFIG_SYS_AT91_PLLB);
+#endif
+
+ /* Enable External Reset */
+ enable_ext_reset();
+#if defined(CONFIG_ATMEL_MATRIX_INIT)
+ /* Initialize matrix */
+ matrix_init();
+#endif
+
+ gd->arch.mck_rate_hz = CONFIG_SYS_MASTER_CLOCK;
+ /*
+ * init timer long enough for using in spl.
+ */
+ timer_init();
+
+ /* enable clocks for all PIOs */
+ at91_periph_clk_enable(ATMEL_ID_PIOA);
+ at91_periph_clk_enable(ATMEL_ID_PIOB);
+ at91_periph_clk_enable(ATMEL_ID_PIOC);
+ /* init console */
+ at91_seriald_hw_init();
preloader_console_init();
mem_init();
+
+ at91_spl_board_init();
}
+#endif
diff --git a/arch/arm/include/asm/arch-at91/at91_common.h
b/arch/arm/include/asm/arch-at91/at91_common.h
index 59e2f43..2d94090 100644
--- a/arch/arm/include/asm/arch-at91/at91_common.h
+++ b/arch/arm/include/asm/arch-at91/at91_common.h
@@ -23,9 +23,13 @@ void at91_udp_hw_init(void);
void at91_uhp_hw_init(void);
void at91_lcd_hw_init(void);
void at91_plla_init(u32 pllar);
+void at91_pllb_init(u32 pllar);
void at91_mck_init(u32 mckr);
void at91_pmc_init(void);
void mem_init(void);
void at91_phy_reset(void);
+void at91_sdram_hw_init(void);
+void at91_mck_init(u32 mckr);
+void at91_spl_board_init(void);
#endif /* AT91_COMMON_H */
diff --git a/arch/arm/include/asm/arch-at91/at91_pmc.h
b/arch/arm/include/asm/arch-at91/at91_pmc.h
index 27331ff..5f64583 100644
--- a/arch/arm/include/asm/arch-at91/at91_pmc.h
+++ b/arch/arm/include/asm/arch-at91/at91_pmc.h
@@ -95,7 +95,7 @@ typedef struct at91_pmc {
#define AT91_PMC_MCKR_CSS_MAIN 0x00000001
#define AT91_PMC_MCKR_CSS_PLLA 0x00000002
#define AT91_PMC_MCKR_CSS_PLLB 0x00000003
-#define AT91_PMC_MCKR_CSS_MASK 0x00000003
+#define AT91_PMC_MCKR_CSS_MASK 0x00000007
#ifdef CONFIG_SAMA5D3
#define AT91_PMC_MCKR_PRES_1 0x00000000
@@ -114,7 +114,7 @@ typedef struct at91_pmc {
#define AT91_PMC_MCKR_PRES_16 0x00000010
#define AT91_PMC_MCKR_PRES_32 0x00000014
#define AT91_PMC_MCKR_PRES_64 0x00000018
-#define AT91_PMC_MCKR_PRES_MASK 0x0000001C
+#define AT91_PMC_MCKR_PRES_MASK 0x0000003C
#endif
#ifdef CONFIG_AT91RM9200
@@ -133,6 +133,7 @@ typedef struct at91_pmc {
#define AT91_PMC_MCKR_MDIV_MASK 0x00000300
#endif
+#define AT91_PMC_MCKR_PLLADIV_MASK 0x00003000
#define AT91_PMC_MCKR_PLLADIV_1 0x00000000
#define AT91_PMC_MCKR_PLLADIV_2 0x00001000
diff --git a/arch/arm/include/asm/arch-at91/at91sam9260.h
b/arch/arm/include/asm/arch-at91/at91sam9260.h
index 2e902ee..1e613fa 100644
--- a/arch/arm/include/asm/arch-at91/at91sam9260.h
+++ b/arch/arm/include/asm/arch-at91/at91sam9260.h
@@ -95,6 +95,7 @@
#define ATMEL_BASE_SDRAMC 0xffffea00
#define ATMEL_BASE_SMC 0xffffec00
#define ATMEL_BASE_MATRIX 0xffffee00
+#define ATMEL_BASE_CCFG 0xffffef14
#define ATMEL_BASE_AIC 0xfffff000
#define ATMEL_BASE_DBGU 0xfffff200
#define ATMEL_BASE_PIOA 0xfffff400
diff --git a/arch/arm/include/asm/arch-at91/at91sam9260_matrix.h
b/arch/arm/include/asm/arch-at91/at91sam9260_matrix.h
index 4755fa1..dc61f48 100644
--- a/arch/arm/include/asm/arch-at91/at91sam9260_matrix.h
+++ b/arch/arm/include/asm/arch-at91/at91sam9260_matrix.h
@@ -61,5 +61,10 @@ struct at91_matrix {
#define AT91_MATRIX_DBPUC (1 << 8)
#define AT91_MATRIX_VDDIOMSEL_1_8V (0 << 16)
#define AT91_MATRIX_VDDIOMSEL_3_3V (1 << 16)
+#define AT91_MATRIX_EBI_IOSR_SEL (1 << 17)
+
+/* Maximum Number of Allowed Cycles for a Burst */
+#define AT91_MATRIX_SLOT_CYCLE (0xff << 0)
+#define AT91_MATRIX_SLOT_CYCLE_(x) (x << 0)
#endif
diff --git a/arch/arm/include/asm/arch-at91/at91sam9_sdramc.h
b/arch/arm/include/asm/arch-at91/at91sam9_sdramc.h
index 5c98cc7..3a076c6 100644
--- a/arch/arm/include/asm/arch-at91/at91sam9_sdramc.h
+++ b/arch/arm/include/asm/arch-at91/at91sam9_sdramc.h
@@ -25,6 +25,21 @@
#define AT91_ASM_SDRAMC_CR (ATMEL_BASE_SDRAMC + 0x08)
#define AT91_ASM_SDRAMC_MDR (ATMEL_BASE_SDRAMC + 0x24)
+#else
+struct sdramc_reg {
+ u32 mr;
+ u32 tr;
+ u32 cr;
+ u32 lpr;
+ u32 ier;
+ u32 idr;
+ u32 imr;
+ u32 isr;
+ u32 mdr;
+};
+
+int sdramc_initialize(unsigned int sdram_address,
+ const struct sdramc_reg *p);
#endif
/* SDRAM Controller (SDRAMC) registers */
@@ -62,11 +77,17 @@
#define AT91_SDRAMC_DBW_32 (0 << 7)
#define AT91_SDRAMC_DBW_16 (1 << 7)
#define AT91_SDRAMC_TWR (0xf << 8) /*
Write Recovery Delay */
+#define AT91_SDRAMC_TWR_VAL(x) (x << 8)
#define AT91_SDRAMC_TRC (0xf << 12) /* Row
Cycle Delay */
+#define AT91_SDRAMC_TRC_VAL(x) (x << 12)
#define AT91_SDRAMC_TRP (0xf << 16) /* Row
Precharge Delay */
+#define AT91_SDRAMC_TRP_VAL(x) (x << 16)
#define AT91_SDRAMC_TRCD (0xf << 20) /* Row
to Column Delay */
+#define AT91_SDRAMC_TRCD_VAL(x) (x << 20)
#define AT91_SDRAMC_TRAS (0xf << 24) /*
Active to Precharge Delay */
+#define AT91_SDRAMC_TRAS_VAL(x) (x << 24)
#define AT91_SDRAMC_TXSR (0xf << 28) /* Exit
Self Refresh to Active Delay */
+#define AT91_SDRAMC_TXSR_VAL(x) (x << 28)
#define AT91_SDRAMC_LPR (ATMEL_BASE_SDRAMC + 0x10) /*
SDRAM Controller Low Power Register */
#define AT91_SDRAMC_LPCB (3 << 0) /*
Low-power Configurations */
@@ -93,5 +114,4 @@
#define AT91_SDRAMC_MD_SDRAM 0
#define AT91_SDRAMC_MD_LOW_POWER_SDRAM 1
-
#endif
--
1.8.3.1
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