diff options
Diffstat (limited to 'arch/arm/cpu/armv7')
| -rw-r--r-- | arch/arm/cpu/armv7/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/Makefile | 9 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/clock.c | 27 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/lowlevel.S | 12 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/pinmux.c | 48 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/reset.c | 26 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/stv0991/timer.c | 114 |
7 files changed, 237 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile index e4197164706..409e6f5651b 100644 --- a/arch/arm/cpu/armv7/Makefile +++ b/arch/arm/cpu/armv7/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_OMAP54XX) += omap5/ obj-$(CONFIG_RMOBILE) += rmobile/ obj-$(CONFIG_ARCH_S5PC1XX) += s5pc1xx/ obj-$(CONFIG_SOCFPGA) += socfpga/ +obj-$(if $(filter stv0991,$(SOC)),y) += stv0991/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_TEGRA20) += tegra20/ obj-$(CONFIG_U8500) += u8500/ diff --git a/arch/arm/cpu/armv7/stv0991/Makefile b/arch/arm/cpu/armv7/stv0991/Makefile new file mode 100644 index 00000000000..95641d345fc --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/Makefile @@ -0,0 +1,9 @@ +# +# (C) Copyright 2014 +# Vikas Manocha, ST Microelectronics, vikas.manocha@stcom +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y := timer.o clock.o pinmux.o reset.o +obj-y += lowlevel.o diff --git a/arch/arm/cpu/armv7/stv0991/clock.c b/arch/arm/cpu/armv7/stv0991/clock.c new file mode 100644 index 00000000000..aca6aba4141 --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/clock.c @@ -0,0 +1,27 @@ +/* + * (C) Copyright 2014 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <asm/arch/stv0991_cgu.h> +#include<asm/arch/stv0991_periph.h> + +static struct stv0991_cgu_regs *const stv0991_cgu_regs = \ + (struct stv0991_cgu_regs *) (CGU_BASE_ADDR); + +void clock_setup(int peripheral) +{ + switch (peripheral) { + case UART_CLOCK_CFG: + writel(UART_CLK_CFG, &stv0991_cgu_regs->uart_freq); + break; + case ETH_CLOCK_CFG: + break; + default: + break; + } +} diff --git a/arch/arm/cpu/armv7/stv0991/lowlevel.S b/arch/arm/cpu/armv7/stv0991/lowlevel.S new file mode 100644 index 00000000000..6dafba35e22 --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/lowlevel.S @@ -0,0 +1,12 @@ +/* + * (C) Copyright 2014 stmicroelectronics + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <linux/linkage.h> + +ENTRY(lowlevel_init) + mov pc, lr +ENDPROC(lowlevel_init) diff --git a/arch/arm/cpu/armv7/stv0991/pinmux.c b/arch/arm/cpu/armv7/stv0991/pinmux.c new file mode 100644 index 00000000000..6d4414aaa56 --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/pinmux.c @@ -0,0 +1,48 @@ +/* + * (C) Copyright 2014 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm/io.h> +#include <asm/arch/stv0991_creg.h> +#include <asm/arch/stv0991_periph.h> +#include <asm/arch/hardware.h> + +static struct stv0991_creg *const stv0991_creg = \ + (struct stv0991_creg *)CREG_BASE_ADDR; + +int stv0991_pinmux_config(int peripheral) +{ + switch (peripheral) { + case UART_GPIOC_30_31: + /* SSDA/SSCL pad muxing to UART Rx/Dx */ + writel((readl(&stv0991_creg->mux12) & GPIOC_31_MUX_MASK) | + CFG_GPIOC_31_UART_RX, + &stv0991_creg->mux12); + writel((readl(&stv0991_creg->mux12) & GPIOC_30_MUX_MASK) | + CFG_GPIOC_30_UART_TX, + &stv0991_creg->mux12); + /* SSDA/SSCL pad config to push pull*/ + writel((readl(&stv0991_creg->cfg_pad6) & GPIOC_31_MODE_MASK) | + CFG_GPIOC_31_MODE_PP, + &stv0991_creg->cfg_pad6); + writel((readl(&stv0991_creg->cfg_pad6) & GPIOC_30_MODE_MASK) | + CFG_GPIOC_30_MODE_HIGH, + &stv0991_creg->cfg_pad6); + break; + case UART_GPIOB_16_17: + /* ethernet rx_6/7 to UART Rx/Dx */ + writel((readl(&stv0991_creg->mux7) & GPIOB_17_MUX_MASK) | + CFG_GPIOB_17_UART_RX, + &stv0991_creg->mux7); + writel((readl(&stv0991_creg->mux7) & GPIOB_16_MUX_MASK) | + CFG_GPIOB_16_UART_TX, + &stv0991_creg->mux7); + break; + default: + break; + } + return 0; +} diff --git a/arch/arm/cpu/armv7/stv0991/reset.c b/arch/arm/cpu/armv7/stv0991/reset.c new file mode 100644 index 00000000000..3384b329af4 --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/reset.c @@ -0,0 +1,26 @@ +/* + * (C) Copyright 2014 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/stv0991_wdru.h> +void reset_cpu(ulong ignored) +{ + puts("System is going to reboot ...\n"); + /* + * This 1 second delay will allow the above message + * to be printed before reset + */ + udelay((1000 * 1000)); + + /* Setting bit 1 of the WDRU unit will reset the SoC */ + writel(WDRU_RST_SYS, &stv0991_wd_ru_ptr->wdru_ctrl1); + + /* system will restart */ + while (1) + ; +} diff --git a/arch/arm/cpu/armv7/stv0991/timer.c b/arch/arm/cpu/armv7/stv0991/timer.c new file mode 100644 index 00000000000..8654b8b686d --- /dev/null +++ b/arch/arm/cpu/armv7/stv0991/timer.c @@ -0,0 +1,114 @@ +/* + * (C) Copyright 2014 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch-stv0991/hardware.h> +#include <asm/arch-stv0991/stv0991_cgu.h> +#include <asm/arch-stv0991/stv0991_gpt.h> + +static struct stv0991_cgu_regs *const stv0991_cgu_regs = \ + (struct stv0991_cgu_regs *) (CGU_BASE_ADDR); + +#define READ_TIMER() (readl(&gpt1_regs_ptr->cnt) & GPT_FREE_RUNNING) +#define GPT_RESOLUTION (CONFIG_STV0991_HZ_CLOCK / CONFIG_STV0991_HZ) + +DECLARE_GLOBAL_DATA_PTR; + +#define timestamp gd->arch.tbl +#define lastdec gd->arch.lastinc + +int timer_init(void) +{ + /* Timer1 clock configuration */ + writel(TIMER1_CLK_CFG, &stv0991_cgu_regs->tim_freq); + writel(readl(&stv0991_cgu_regs->cgu_enable_2) | + TIMER1_CLK_EN, &stv0991_cgu_regs->cgu_enable_2); + + /* Stop the timer */ + writel(readl(&gpt1_regs_ptr->cr1) & ~GPT_CR1_CEN, &gpt1_regs_ptr->cr1); + writel(GPT_PRESCALER_128, &gpt1_regs_ptr->psc); + /* Configure timer for auto-reload */ + writel(readl(&gpt1_regs_ptr->cr1) | GPT_MODE_AUTO_RELOAD, + &gpt1_regs_ptr->cr1); + + /* load value for free running */ + writel(GPT_FREE_RUNNING, &gpt1_regs_ptr->arr); + + /* start timer */ + writel(readl(&gpt1_regs_ptr->cr1) | GPT_CR1_CEN, + &gpt1_regs_ptr->cr1); + + /* Reset the timer */ + lastdec = READ_TIMER(); + timestamp = 0; + + return 0; +} + +/* + * timer without interrupts + */ +ulong get_timer(ulong base) +{ + return (get_timer_masked() / GPT_RESOLUTION) - base; +} + +void __udelay(unsigned long usec) +{ + ulong tmo; + ulong start = get_timer_masked(); + ulong tenudelcnt = CONFIG_STV0991_HZ_CLOCK / (1000 * 100); + ulong rndoff; + + rndoff = (usec % 10) ? 1 : 0; + + /* tenudelcnt timer tick gives 10 microsecconds delay */ + tmo = ((usec / 10) + rndoff) * tenudelcnt; + + while ((ulong) (get_timer_masked() - start) < tmo) + ; +} + +ulong get_timer_masked(void) +{ + ulong now = READ_TIMER(); + + if (now >= lastdec) { + /* normal mode */ + timestamp += now - lastdec; + } else { + /* we have an overflow ... */ + timestamp += now + GPT_FREE_RUNNING - lastdec; + } + lastdec = now; + + return timestamp; +} + +void udelay_masked(unsigned long usec) +{ + return udelay(usec); +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On ARM it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On ARM it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + return CONFIG_STV0991_HZ; +} |