From 3ccb2d41b95e9d6326767a297b77152ef541b6c1 Mon Sep 17 00:00:00 2001 From: Juergen Beisert Date: Sat, 28 Jul 2012 17:10:47 +0200 Subject: ARM/Samsung: add generic S3C6410 SoC specific functions Signed-off-by: Juergen Beisert Signed-off-by: Sascha Hauer --- arch/arm/mach-samsung/Makefile | 2 +- .../mach-samsung/include/mach/devices-s3c64xx.h | 40 +++++++++++++ arch/arm/mach-samsung/include/mach/s3c-generic.h | 17 ++++++ arch/arm/mach-samsung/mem-s3c64xx.c | 66 ++++++++++++++++++++++ 4 files changed, 124 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-samsung/include/mach/devices-s3c64xx.h create mode 100644 arch/arm/mach-samsung/mem-s3c64xx.c (limited to 'arch/arm/mach-samsung') diff --git a/arch/arm/mach-samsung/Makefile b/arch/arm/mach-samsung/Makefile index 9a2484f361..42a6708d78 100644 --- a/arch/arm/mach-samsung/Makefile +++ b/arch/arm/mach-samsung/Makefile @@ -2,5 +2,5 @@ obj-y += s3c-timer.o generic.o obj-lowlevel-$(CONFIG_ARCH_S3C24xx) += lowlevel-s3c24x0.o obj-lowlevel-$(CONFIG_ARCH_S5PCxx) += lowlevel-s5pcxx.o obj-$(CONFIG_ARCH_S3C24xx) += gpio-s3c24x0.o clocks-s3c24xx.o mem-s3c24x0.o -obj-$(CONFIG_ARCH_S3C64xx) += gpio-s3c64xx.o clocks-s3c64xx.o +obj-$(CONFIG_ARCH_S3C64xx) += gpio-s3c64xx.o clocks-s3c64xx.o mem-s3c64xx.o obj-$(CONFIG_S3C_LOWLEVEL_INIT) += $(obj-lowlevel-y) diff --git a/arch/arm/mach-samsung/include/mach/devices-s3c64xx.h b/arch/arm/mach-samsung/include/mach/devices-s3c64xx.h new file mode 100644 index 0000000000..bcbee972e6 --- /dev/null +++ b/arch/arm/mach-samsung/include/mach/devices-s3c64xx.h @@ -0,0 +1,40 @@ +/* + * Copyright 2012 Juergen Beisert + * + * 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. + * + */ + +#ifndef INCLUDE_MACH_DEVICES_S3C64XX_H +# define INCLUDE_MACH_DEVICES_S3C64XX_H + +#include +#include + +static inline void s3c64xx_add_uart1(void) +{ + add_generic_device("s3c_serial", DEVICE_ID_DYNAMIC, NULL, S3C_UART1_BASE, + S3C_UART1_SIZE, IORESOURCE_MEM, NULL); +} + +static inline void s3c64xx_add_uart2(void) +{ + add_generic_device("s3c_serial", DEVICE_ID_DYNAMIC, NULL, S3C_UART2_BASE, + S3C_UART2_SIZE, IORESOURCE_MEM, NULL); +} + +static inline void s3c64xx_add_uart3(void) +{ + add_generic_device("s3c_serial", DEVICE_ID_DYNAMIC, NULL, S3C_UART3_BASE, + S3C_UART3_SIZE, IORESOURCE_MEM, NULL); +} + +#endif /* INCLUDE_MACH_DEVICES_S3C64XX_H */ diff --git a/arch/arm/mach-samsung/include/mach/s3c-generic.h b/arch/arm/mach-samsung/include/mach/s3c-generic.h index 11b083d4a8..b11e8e3ff4 100644 --- a/arch/arm/mach-samsung/include/mach/s3c-generic.h +++ b/arch/arm/mach-samsung/include/mach/s3c-generic.h @@ -41,3 +41,20 @@ void s3c24xx_disable_second_sdram_bank(void); #ifdef CONFIG_ARCH_S5PCxx void s5p_init_pll(void); #endif + +#ifdef CONFIG_ARCH_S3C64xx +unsigned s3c_set_epllclk(unsigned, unsigned, unsigned, unsigned); +uint32_t s3c_get_epllclk(void); +unsigned s3c_get_hsmmc_clk(int); +void s3c_set_hsmmc_clk(int, int, unsigned); +unsigned s3c6410_get_memory_size(void); +struct s3c6410_chipselect { + unsigned adr_setup_t; /* in [ns] */ + unsigned access_setup_t; /* in [ns] */ + unsigned access_t; /* in [ns] */ + unsigned cs_hold_t; /* in [ns] */ + unsigned adr_hold_t; /* in [ns] */ + unsigned char width; /* 8 or 16 */ +}; +int s3c6410_setup_chipselect(int, const struct s3c6410_chipselect*); +#endif diff --git a/arch/arm/mach-samsung/mem-s3c64xx.c b/arch/arm/mach-samsung/mem-s3c64xx.c new file mode 100644 index 0000000000..aca2cf5066 --- /dev/null +++ b/arch/arm/mach-samsung/mem-s3c64xx.c @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2012 Juergen Beisert + * + * 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. + */ + +#include +#include +#include +#include +#include + +#define S3C_DRAMC_CHIP_0_CFG (S3C_DRAMC + 0x200) + +/* note: this routine honors the first memory bank only */ +unsigned s3c6410_get_memory_size(void) +{ + unsigned reg = readl(S3C_DRAMC_CHIP_0_CFG) & 0xff; + + return ~(reg << 24) + 1; +} + +/* configure the timing of one of the available external chip select lines */ +int s3c6410_setup_chipselect(int no, const struct s3c6410_chipselect *c) +{ + unsigned per_t = 1000000000 / s3c_get_hclk(); + unsigned tacs, tcos, tacc, tcoh, tcah, shift; + uint32_t reg; + + /* start of cycle to chip select assertion (= address/data setup) */ + tacs = DIV_ROUND_UP(c->adr_setup_t, per_t); + /* start of CS to read/write assertion (= access setup) */ + tcos = DIV_ROUND_UP(c->access_setup_t, per_t); + /* length of read/write assertion (= access lenght) */ + tacc = DIV_ROUND_UP(c->access_t, per_t) - 1; + /* CS hold after access is finished */ + tcoh = DIV_ROUND_UP(c->cs_hold_t, per_t); + /* adress/data hold after CS is deasserted */ + tcah = DIV_ROUND_UP(c->adr_hold_t, per_t); + + shift = no * 4; + reg = readl(S3C_SROM_BW) & ~(0xf << shift); + if (c->width == 16) + reg |= 0x1 << shift; + writel(reg, S3C_SROM_BW); +#ifdef DEBUG + if (tacs > 15 || tcos > 15 || tacc > 31 || tcoh > 15 || tcah > 15) { + pr_err("At least one of the timings are invalid\n"); + return -EINVAL; + } + pr_info("Will write 0x%08X\n", tacs << 28 | tcos << 24 | tacc << 16 | + tcoh << 12 | tcah << 8); +#endif + writel(tacs << 28 | tcos << 24 | tacc << 16 | tcoh << 12 | tcah << 8, + S3C_SROM_BC0 + shift); + + return 0; +} -- cgit v1.2.3