[PATCH v2 08/11] ARM: at91: Add lowlevel helpers for at91sam9263
Sam Ravnborg
sam at ravnborg.org
Tue Jun 28 13:38:46 PDT 2022
Add lowlevel helpers like we already have for sama5d2 etc.
Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
---
arch/arm/mach-at91/Makefile | 1 +
arch/arm/mach-at91/include/mach/sam92_ll.h | 54 ++++++
arch/arm/mach-at91/sam9263_ll.c | 215 +++++++++++++++++++++
3 files changed, 270 insertions(+)
create mode 100644 arch/arm/mach-at91/include/mach/sam92_ll.h
create mode 100644 arch/arm/mach-at91/sam9263_ll.c
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index b171d682f..390d49d03 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -31,6 +31,7 @@ ifeq ($(CONFIG_OFDEVICE),)
obj-$(CONFIG_SOC_AT91SAM9263) += at91sam9263.o at91sam9263_devices.o
obj-$(CONFIG_SOC_SAMA5D3) += sama5d3.o sama5d3_devices.o
endif
+lwl-$(CONFIG_SOC_AT91SAM9263) += sam9263_ll.o
lwl-$(CONFIG_SOC_SAMA5D2) += sama5d2_ll.o
obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o
lwl-$(CONFIG_SOC_SAMA5D3) += sama5d3_ll.o
diff --git a/arch/arm/mach-at91/include/mach/sam92_ll.h b/arch/arm/mach-at91/include/mach/sam92_ll.h
new file mode 100644
index 000000000..f5cef197d
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/sam92_ll.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MACH_SAM92_LL_H__
+#define __MACH_SAM92_LL_H__
+
+#include <debug_ll.h>
+#include <common.h>
+
+#include <mach/at91_pmc_ll.h>
+#include <mach/at91sam9260.h>
+#include <mach/at91sam9261.h>
+#include <mach/at91sam9263.h>
+#include <mach/at91sam926x.h>
+#include <mach/debug_ll.h>
+#include <mach/early_udelay.h>
+#include <mach/iomux.h>
+
+struct sam92_pmc_config {
+ unsigned int diva;
+ unsigned int mula;
+};
+
+void sam9263_lowlevel_init(const struct sam92_pmc_config *config);
+
+static inline void sam92_pmc_enable_periph_clock(int clk)
+{
+ at91_pmc_enable_periph_clock(IOMEM(AT91SAM926X_BASE_PMC), clk);
+}
+
+/* requires relocation */
+static inline void sam92_udelay_init(unsigned int msc)
+{
+ early_udelay_init(IOMEM(AT91SAM926X_BASE_PMC), IOMEM(AT91SAM9263_BASE_PIT),
+ AT91SAM926X_ID_SYS, msc, 0);
+}
+
+static inline void sam92_dbgu_setup_ll(unsigned int mck)
+{
+ void __iomem *pio = IOMEM(AT91SAM9263_BASE_PIOC);
+
+ // Setup clock for pio
+ sam92_pmc_enable_periph_clock(AT91SAM9263_ID_PIOCDE);
+
+ // Setup DBGU uart
+ at91_mux_pio_pin(pio, pin_to_mask(AT91_PIN_PC30), AT91_MUX_PERIPH_A, GPIO_PULL_UP); // DRXD
+ at91_mux_pio_pin(pio, pin_to_mask(AT91_PIN_PC31), AT91_MUX_PERIPH_A, 0); // DTXD
+
+ // Setup dbgu
+ at91_dbgu_setup_ll(IOMEM(AT91_BASE_DBGU1), mck, CONFIG_BAUDRATE);
+ pbl_set_putc(at91_dbgu_putc, IOMEM(AT91_BASE_DBGU1));
+ putc_ll('#');
+}
+
+#endif
diff --git a/arch/arm/mach-at91/sam9263_ll.c b/arch/arm/mach-at91/sam9263_ll.c
new file mode 100644
index 000000000..ffde065f6
--- /dev/null
+++ b/arch/arm/mach-at91/sam9263_ll.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-only AND BSD-1-Clause
+// SPDX-FileCopyrightText: 2017, Microchip Corporation
+
+#include <mach/at91sam9263_matrix.h>
+#include <mach/barebox-arm.h>
+#include <mach/at91_rstc.h>
+#include <mach/at91_wdt.h>
+#include <mach/sam92_ll.h>
+
+static void sam9263_pmc_init(const struct sam92_pmc_config *config)
+{
+ at91_pmc_init(IOMEM(AT91SAM926X_BASE_PMC), 0);
+
+ /* Initialize PLL charge pump, must be done before PLLAR/PLLBR */
+ at91_pmc_init_pll(IOMEM(AT91SAM926X_BASE_PMC), AT91SAM9_PMC_ICPPLLA | AT91SAM9_PMC_ICPPLLB);
+
+ /* Setting PLL A and divider A */
+ at91_pmc_cfg_plla(IOMEM(AT91SAM926X_BASE_PMC),
+ AT91_PMC_MUL_(config->mula) |
+ AT91_PMC_OUT_2 | // 190 to 240 MHz
+ config->diva, // Divider
+ 0);
+
+ /* Selection of Master Clock and Processor Clock */
+
+ /* PCK = PLLA = 2 * MCK */
+ at91_pmc_cfg_mck(IOMEM(AT91SAM926X_BASE_PMC),
+ AT91_PMC_CSS_SLOW
+ | AT91_PMC_PRES_1
+ | AT91SAM9_PMC_MDIV_2
+ | AT91_PMC_PDIV_1,
+ 0);
+
+ /* Switch MCK on PLLA output */
+ at91_pmc_cfg_mck(IOMEM(AT91SAM926X_BASE_PMC),
+ AT91_PMC_CSS_PLLA
+ | AT91_PMC_PRES_1
+ | AT91SAM9_PMC_MDIV_2
+ | AT91_PMC_PDIV_1,
+ 0);
+}
+
+static inline void matrix_wr(unsigned int offset, const unsigned int value)
+{
+ writel(value, IOMEM(AT91SAM9263_BASE_MATRIX + offset));
+}
+
+static void sam9263_matrix_init(void)
+{
+ /* Bus Matrix Master Configuration Register */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG0, AT91SAM9263_MATRIX_ULBT_SIXTEEN); /* OHCI */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG1, AT91SAM9263_MATRIX_ULBT_EIGHT); /* ISI */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG2, AT91SAM9263_MATRIX_ULBT_EIGHT); /* 2D */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG3, AT91SAM9263_MATRIX_ULBT_EIGHT); /* DMAC */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG4, AT91SAM9263_MATRIX_ULBT_FOUR); /* MACB */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG5, AT91SAM9263_MATRIX_ULBT_SIXTEEN); /* LCDC */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG6, AT91SAM9263_MATRIX_ULBT_SINGLE); /* PDC */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG7, AT91SAM9263_MATRIX_ULBT_EIGHT); /* DBUS */
+ matrix_wr(AT91SAM9263_MATRIX_MCFG8, AT91SAM9263_MATRIX_ULBT_EIGHT); /* IBUS */
+
+ /* Bus Matrix Slave Configuration Registers */
+
+ /* ROM */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG0,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_ARM926I
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(32));
+
+ /* RAM80K */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG1,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_EMAC
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(32));
+
+ /* RAM16K */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG2,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_USB
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(16));
+
+ /* PERIPHERALS */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG3,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_PDC
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(4));
+
+ /* EBI0 */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG4,
+ AT91SAM9263_MATRIX_ARBT_ROUND_ROBIN
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_ARM926I
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(32));
+
+ /* EBI1 */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG5,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_LCDC
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(64));
+
+ /* APB */
+ matrix_wr(AT91SAM9263_MATRIX_SCFG6,
+ AT91SAM9263_MATRIX_ARBT_FIXED_PRIORITY
+ | AT91SAM9263_MATRIX_FIXED_DEFMSTR_ARM926D
+ | AT91SAM9263_MATRIX_DEFMSTR_TYPE_LAST
+ | AT91SAM9263_MATRIX_SLOT_CYCLE_(4));
+
+ /* ROM */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS0,
+ AT91SAM9263_MATRIX_M0PR_(1)
+ | AT91SAM9263_MATRIX_M1PR_(0)
+ | AT91SAM9263_MATRIX_M2PR_(2)
+ | AT91SAM9263_MATRIX_M3PR_(1)
+ | AT91SAM9263_MATRIX_M4PR_(0)
+ | AT91SAM9263_MATRIX_M5PR_(3)
+ | AT91SAM9263_MATRIX_M6PR_(2)
+ | AT91SAM9263_MATRIX_M7PR_(3));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS0, AT91SAM9263_MATRIX_M8PR_(0));
+
+ /* RAM80K */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS1,
+ AT91SAM9263_MATRIX_M0PR_(1)
+ | AT91SAM9263_MATRIX_M1PR_(2)
+ | AT91SAM9263_MATRIX_M2PR_(1)
+ | AT91SAM9263_MATRIX_M3PR_(3)
+ | AT91SAM9263_MATRIX_M4PR_(0)
+ | AT91SAM9263_MATRIX_M5PR_(0)
+ | AT91SAM9263_MATRIX_M6PR_(3)
+ | AT91SAM9263_MATRIX_M7PR_(0));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS1, AT91SAM9263_MATRIX_M8PR_(2));
+
+ /* RAM16K */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS2,
+ AT91SAM9263_MATRIX_M0PR_(1)
+ | AT91SAM9263_MATRIX_M1PR_(0)
+ | AT91SAM9263_MATRIX_M2PR_(2)
+ | AT91SAM9263_MATRIX_M3PR_(1)
+ | AT91SAM9263_MATRIX_M4PR_(0)
+ | AT91SAM9263_MATRIX_M5PR_(3)
+ | AT91SAM9263_MATRIX_M6PR_(3)
+ | AT91SAM9263_MATRIX_M7PR_(2));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS2, AT91SAM9263_MATRIX_M8PR_(0));
+
+ /* PERIPHERALS */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS3,
+ AT91SAM9263_MATRIX_M0PR_(0)
+ | AT91SAM9263_MATRIX_M1PR_(1)
+ | AT91SAM9263_MATRIX_M2PR_(0)
+ | AT91SAM9263_MATRIX_M3PR_(2)
+ | AT91SAM9263_MATRIX_M4PR_(1)
+ | AT91SAM9263_MATRIX_M5PR_(0)
+ | AT91SAM9263_MATRIX_M6PR_(3)
+ | AT91SAM9263_MATRIX_M7PR_(2));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS3, AT91SAM9263_MATRIX_M8PR_(3));
+
+ /* EBI0 */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS4,
+ AT91SAM9263_MATRIX_M0PR_(1)
+ | AT91SAM9263_MATRIX_M1PR_(3)
+ | AT91SAM9263_MATRIX_M2PR_(0)
+ | AT91SAM9263_MATRIX_M3PR_(2)
+ | AT91SAM9263_MATRIX_M4PR_(3)
+ | AT91SAM9263_MATRIX_M5PR_(0)
+ | AT91SAM9263_MATRIX_M6PR_(0)
+ | AT91SAM9263_MATRIX_M7PR_(1));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS4, AT91SAM9263_MATRIX_M8PR_(2));
+
+ /* EBI1 */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS5,
+ AT91SAM9263_MATRIX_M0PR_(0)
+ | AT91SAM9263_MATRIX_M1PR_(1)
+ | AT91SAM9263_MATRIX_M2PR_(0)
+ | AT91SAM9263_MATRIX_M3PR_(0)
+ | AT91SAM9263_MATRIX_M4PR_(3)
+ | AT91SAM9263_MATRIX_M5PR_(2)
+ | AT91SAM9263_MATRIX_M6PR_(3)
+ | AT91SAM9263_MATRIX_M7PR_(2));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS5, AT91SAM9263_MATRIX_M8PR_(1));
+
+ /* APB */
+ matrix_wr(AT91SAM9263_MATRIX_PRAS6,
+ AT91SAM9263_MATRIX_M0PR_(1)
+ | AT91SAM9263_MATRIX_M1PR_(0)
+ | AT91SAM9263_MATRIX_M2PR_(2)
+ | AT91SAM9263_MATRIX_M3PR_(1)
+ | AT91SAM9263_MATRIX_M4PR_(0)
+ | AT91SAM9263_MATRIX_M5PR_(0)
+ | AT91SAM9263_MATRIX_M6PR_(3)
+ | AT91SAM9263_MATRIX_M7PR_(3));
+
+ matrix_wr(AT91SAM9263_MATRIX_PRBS6, AT91SAM9263_MATRIX_M8PR_(2));
+}
+
+static void sam9263_rstc_init(void)
+{
+ writel(AT91_RSTC_KEY | AT91_RSTC_URSTEN, IOMEM(AT91SAM926X_BASE_RSTC + AT91_RSTC_MR));
+}
+
+void sam9263_lowlevel_init(const struct sam92_pmc_config *config)
+{
+ at91_wdt_disable(IOMEM(AT91SAM9263_BASE_WDT));
+ sam9263_pmc_init(config);
+ sam9263_matrix_init();
+ sam9263_rstc_init();
+}
--
2.34.1
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