[U-Boot] [PATCH 1/4] s5p6442: Support Samsung s5p6442 SoC
Minkyu Kang
promsoft at gmail.com
Mon Mar 29 08:19:37 CEST 2010
Dear Joonyoung Shim,
On 29 March 2010 11:56, Joonyoung Shim <jy0922.shim at samsung.com> wrote:
> This patch adds support s5p6442 SoC. The s5p6442 SoC is ARM1176
> processor.
>
> Cc: Minkyu Kang <mk7.kang at samsung.com>
> Cc: Kyungmin Park <kyungmin.park at samsung.com>
> Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
> ---
> cpu/arm1176/s5p64xx/Makefile | 52 +++++++++
> cpu/arm1176/s5p64xx/clock.c | 163 +++++++++++++++++++++++++++
> cpu/arm1176/s5p64xx/cpu_info.c | 58 ++++++++++
> cpu/arm1176/s5p64xx/reset.S | 35 ++++++
> cpu/arm1176/s5p64xx/timer.c | 204 ++++++++++++++++++++++++++++++++++
> include/asm-arm/arch-s5p64xx/clk.h | 38 +++++++
> include/asm-arm/arch-s5p64xx/clock.h | 69 ++++++++++++
> include/asm-arm/arch-s5p64xx/cpu.h | 57 ++++++++++
> include/asm-arm/arch-s5p64xx/gpio.h | 111 ++++++++++++++++++
> include/asm-arm/arch-s5p64xx/power.h | 76 +++++++++++++
> include/asm-arm/arch-s5p64xx/pwm.h | 58 ++++++++++
> include/asm-arm/arch-s5p64xx/uart.h | 47 ++++++++
> 12 files changed, 968 insertions(+), 0 deletions(-)
> create mode 100644 cpu/arm1176/s5p64xx/Makefile
> create mode 100644 cpu/arm1176/s5p64xx/clock.c
> create mode 100644 cpu/arm1176/s5p64xx/cpu_info.c
> create mode 100644 cpu/arm1176/s5p64xx/reset.S
> create mode 100644 cpu/arm1176/s5p64xx/timer.c
> create mode 100644 include/asm-arm/arch-s5p64xx/clk.h
> create mode 100644 include/asm-arm/arch-s5p64xx/clock.h
> create mode 100644 include/asm-arm/arch-s5p64xx/cpu.h
> create mode 100644 include/asm-arm/arch-s5p64xx/gpio.h
> create mode 100644 include/asm-arm/arch-s5p64xx/power.h
> create mode 100644 include/asm-arm/arch-s5p64xx/pwm.h
> create mode 100644 include/asm-arm/arch-s5p64xx/uart.h
>
> diff --git a/cpu/arm1176/s5p64xx/clock.c b/cpu/arm1176/s5p64xx/clock.c
> new file mode 100644
> index 0000000..5fe0482
> --- /dev/null
> +++ b/cpu/arm1176/s5p64xx/clock.c
> @@ -0,0 +1,163 @@
> +/*
> + * Copyright (C) 2010 Samsung Electronics
> + * Minkyu Kang <mk7.kang at samsung.com>
> + * Joonyoung Shim <jy0922.shim at samsung.com>
> + *
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/clk.h>
> +
> +#ifndef CONFIG_SYS_CLK_FREQ_6442
> +#define CONFIG_SYS_CLK_FREQ_6442 12000000
> +#endif
> +
> +unsigned long (*get_pclk)(void);
> +unsigned long (*get_arm_clk)(void);
> +unsigned long (*get_pll_clk)(int);
> +
> +/* s5p6442: return pll clock frequency */
> +static unsigned long s5p6442_get_pll_clk(int pllreg)
> +{
> + struct s5p6442_clock *clk = (struct s5p6442_clock *)S5P64XX_CLOCK_BASE;
> + unsigned long r, m, p, s, mask, fout;
> + unsigned int freq;
> +
> + switch (pllreg) {
> + case APLL:
> + r = readl(&clk->apll_con);
> + break;
> + case MPLL:
> + r = readl(&clk->mpll_con);
> + break;
> + case EPLL:
> + r = readl(&clk->epll_con);
> + break;
> + case VPLL:
> + r = readl(&clk->vpll_con);
> + break;
> + default:
> + printf("Unsupported PLL (%d)\n", pllreg);
> + return 0;
> + }
> +
> + /*
> + * APLL_CON: MIDV [25:16]
> + * MPLL_CON: MIDV [25:16]
> + * EPLL_CON: MIDV [24:16]
> + * VPLL_CON: MIDV [24:16]
> + */
> + if (pllreg == APLL || pllreg == MPLL)
> + mask = 0x3ff;
> + else
> + mask = 0x1ff;
> +
> + m = (r >> 16) & mask;
> +
> + /* PDIV [13:8] */
> + p = (r >> 8) & 0x3f;
> + /* SDIV [2:0] */
> + s = r & 0x7;
> +
> + freq = CONFIG_SYS_CLK_FREQ_6442;
> + if (pllreg == APLL) {
> + if (s < 1)
> + s = 1;
> + /* FOUT = MDIV * FIN / (PDIV * 2^(SDIV - 1)) */
> + fout = m * (freq / (p * (1 << (s - 1))));
> + } else {
> + /* FOUT = MDIV * FIN / (PDIV * 2^SDIV) */
> + fout = m * (freq / (p * (1 << s)));
> + }
> +
> + return fout;
> +}
> +
> +/* s5p6442: return ARM clock frequency */
> +static unsigned long s5p6442_get_arm_clk(void)
> +{
> + struct s5p6442_clock *clk = (struct s5p6442_clock *)S5P64XX_CLOCK_BASE;
> + unsigned long div;
> + unsigned long dout_apll, armclk;
> + unsigned int apll_ratio;
> +
> + div = readl(&clk->div0);
> +
> + /* APLL_RATIO: [2:0] */
> + apll_ratio = div & 0x7;
> +
> + dout_apll = get_pll_clk(APLL) / (apll_ratio + 1);
> + armclk = dout_apll;
> +
> + return armclk;
> +}
> +
> +/* s5p6442: return D0CLK frequency */
> +static unsigned long get_d0clk(void)
clock.c:116: warning: 'get_d0clk' defined but not used.
Please remove this function, if didn't use.
> +{
> + struct s5p6442_clock *clk = (struct s5p6442_clock *)S5P64XX_CLOCK_BASE;
> + unsigned long d0clk;
> + uint div, d0_bus_ratio;
> +
> + div = readl(&clk->div0);
> + /* D0CLK_RATIO: [19:16] */
> + d0_bus_ratio = (div >> 16) & 0xf;
> +
> + d0clk = get_arm_clk() / (d0_bus_ratio + 1);
> +
> + return d0clk;
> +}
> +
> +/* s5p6442: return P1CLK frequency */
> +static unsigned long get_p1clk(void)
> +{
> + struct s5p6442_clock *clk = (struct s5p6442_clock *)S5P64XX_CLOCK_BASE;
> + unsigned long d1_bus, p1clk;
> + uint div, d1_bus_ratio, p1clk_ratio;
> +
> + div = readl(&clk->div0);
> + /* D1CLK_RATIO: [27:24] */
> + d1_bus_ratio = (div >> 24) & 0xf;
> + /* P1CLK_RATIO: [30:28] */
> + p1clk_ratio = (div >> 28) & 0x7;
> +
> + /* ASYNC Mode */
> + d1_bus = get_pll_clk(MPLL) / (d1_bus_ratio + 1);
> + p1clk = d1_bus / (p1clk_ratio + 1);
> +
> + return p1clk;
> +}
> +
> +/* s5p6442: return peripheral clock frequency */
> +static unsigned long s5p6442_get_pclk(void)
> +{
> + return get_p1clk();
> +}
> +
> +void s5p64xx_clock_init(void)
> +{
> + if (cpu_is_s5p6442()) {
> + get_pll_clk = s5p6442_get_pll_clk;
> + get_arm_clk = s5p6442_get_arm_clk;
> + get_pclk = s5p6442_get_pclk;
> + }
> +}
Thanks
Minkyu Kang
--
from. prom.
www.promsoft.net
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