[PATCH v2 08/11] ARM: at91: Add lowlevel helpers for at91sam9263
Ahmad Fatoum
a.fatoum at pengutronix.de
Tue Jun 28 23:50:43 PDT 2022
On 28.06.22 22:38, Sam Ravnborg wrote:
> Add lowlevel helpers like we already have for sama5d2 etc.
Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
>
> 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();
> +}
--
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