diff options
author | imp <imp@FreeBSD.org> | 2014-01-19 17:45:13 +0000 |
---|---|---|
committer | imp <imp@FreeBSD.org> | 2014-01-19 17:45:13 +0000 |
commit | ba79e5aada4f023afbaf8d20070aff5514b46200 (patch) | |
tree | a555648c7fdf57067e8f675e87dac3ac7f060ee1 | |
parent | d0581e230aa7ea2817610b5a7e08e8e6f0bc8996 (diff) | |
download | FreeBSD-src-ba79e5aada4f023afbaf8d20070aff5514b46200.zip FreeBSD-src-ba79e5aada4f023afbaf8d20070aff5514b46200.tar.gz |
Add standard memory controller helper functions.
-rw-r--r-- | sys/arm/at91/at91_smc.c | 91 | ||||
-rw-r--r-- | sys/arm/at91/at91_smc.h | 116 | ||||
-rw-r--r-- | sys/arm/at91/files.at91 | 1 |
3 files changed, 208 insertions, 0 deletions
diff --git a/sys/arm/at91/at91_smc.c b/sys/arm/at91/at91_smc.c new file mode 100644 index 0000000..2d59d16 --- /dev/null +++ b/sys/arm/at91/at91_smc.c @@ -0,0 +1,91 @@ +/*- + * Copyright (c) 2014 M. Warner Losh. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> + +#include <arm/at91/at91reg.h> +#include <arm/at91/at91_smc.h> +#include <arm/at91/at91sam9260reg.h> + +/* + * RD4HW()/WR4HW() read and write at91 hardware register space directly. They + * serve the same purpose as the RD4()/WR4() idiom you see in many drivers, + * except that those translate to bus_space calls, but in this code we need to + * access some devices before bus_space is ready to use. Of course for this to + * work the appropriate static device mappings need to be made in machdep.c. + */ +static inline uint32_t +RD4HW(uint32_t devbase, uint32_t regoff) +{ + + return *(volatile uint32_t *)(AT91_BASE + devbase + regoff); +} + + +static inline void +WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val) +{ + + *(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val; +} + + +void +at91_smc_setup(int id, int cs, const struct at91_smc_init *smc) +{ + // Need a generic way to get this address for all SoCs... Assume 9260 for now... + uint32_t base = AT91SAM9260_SMC_BASE + SMC_CS_OFF(cs); + + WR4HW(base, SMC_SETUP, SMC_SETUP_NCS_RD_SETUP(smc->ncs_rd_setup) | + SMC_SETUP_NRD_SETUP(smc->nrd_setup) | + SMC_SETUP_NCS_WR_SETUP(smc->ncs_wr_setup) | + SMC_SETUP_NWE_SETUP(smc->nwe_setup)); + WR4HW(base, SMC_PULSE, SMC_PULSE_NCS_RD_PULSE(smc->ncs_rd_pulse) | + SMC_PULSE_NRD_PULSE(smc->nrd_pulse) | + SMC_PULSE_NCS_WR_PULSE(smc->ncs_wr_pulse) | + SMC_PULSE_NWE_PULSE(smc->nwe_pulse)); + WR4HW(base, SMC_CYCLE, SMC_CYCLE_NRD_CYCLE(smc->nrd_cycle) | + SMC_CYCLE_NWE_CYCLE(smc->nwe_cycle)); + WR4HW(base, SMC_MODE, smc->mode | SMC_MODE_TDF_CYCLES(smc->tdf_cycles)); +} + +void +at91_ebi_enable(int bank) +{ + + WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) | + RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA)); +} + +void +at91_ebi_disable(int bank) +{ + + WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) & + RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA)); +} diff --git a/sys/arm/at91/at91_smc.h b/sys/arm/at91/at91_smc.h new file mode 100644 index 0000000..f571c46 --- /dev/null +++ b/sys/arm/at91/at91_smc.h @@ -0,0 +1,116 @@ +/*- + * Copyright (c) 2014 M. Warner Losh. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* $FreeBSD$ */ + +#ifndef ARM_AT91_AT91_SMC_H +#define ARM_AT91_AT91_SMC_H + +/* Registers */ +#define SMC_SETUP 0x00 +#define SMC_PULSE 0x04 +#define SMC_CYCLE 0x08 +#define SMC_MODE 0x0C + +#define SMC_CS_OFF(cs) (0x10 * (cs)) + +/* Setup */ +#define SMC_SETUP_NCS_RD_SETUP(x) ((x) << 24) +#define SMC_SETUP_NRD_SETUP(x) ((x) << 16) +#define SMC_SETUP_NCS_WR_SETUP(x) ((x) << 8) +#define SMC_SETUP_NWE_SETUP(x) (x) + +/* Pulse */ +#define SMC_PULSE_NCS_RD_PULSE(x) ((x) << 24) +#define SMC_PULSE_NRD_PULSE(x) ((x) << 16) +#define SMC_PULSE_NCS_WR_PULSE(x) ((x) << 8) +#define SMC_PULSE_NWE_PULSE(x) (x) + +/* Cycle */ +#define SMC_CYCLE_NRD_CYCLE(x) ((x) << 16) +#define SMC_CYCLE_NWE_CYCLE(x) (x) + +/* Mode */ +#define SMC_MODE_READ (1 << 0) +#define SMC_MODE_WRITE (1 << 1) +#define SMC_MODE_EXNW_DISABLED (0 << 4) +#define SMC_MODE_EXNW_FROZEN_MODE (2 << 4) +#define SMC_MODE_EXNW_READY_MODE (3 << 4) +#define SMC_MODE_BAT (1 << 8) +#define SMC_MODE_DBW_8BIT (0 << 12) +#define SMC_MODE_DBW_16BIT (1 << 12) +#define SMC_MODE_DBW_32_BIT (2 << 12) +#define SMC_MODE_TDF_CYCLES(x) ((x) << 16) +#define SMC_MODE_TDF_MODE (1 << 20) +#define SMC_MODE_PMEN (1 << 24) +#define SMC_PS_4BYTE (0 << 28) +#define SMC_PS_8BYTE (1 << 28) +#define SMC_PS_16BYTE (2 << 28) +#define SMC_PS_32BYTE (3 << 28) + +/* + * structure to ease init. See the SMC chapter in the datasheet for + * the appropriate SoC you are using for details. + */ +struct at91_smc_init +{ + /* Setup register */ + uint8_t ncs_rd_setup; + uint8_t nrd_setup; + uint8_t ncs_wr_setup; + uint8_t nwe_setup; + + /* Pulse register */ + uint8_t ncs_rd_pulse; + uint8_t nrd_pulse; + uint8_t ncs_wr_pulse; + uint8_t nwe_pulse; + + /* Cycle register */ + uint16_t nrd_cycle; + uint16_t nwe_cycle; + + /* Mode register */ + uint8_t mode; /* Combo of READ/WRITE/EXNW fields */ + uint8_t bat; + uint8_t dwb; + uint8_t tdf_cycles; + uint8_t tdf_mode; + uint8_t pmen; + uint8_t ps; +}; + +/* + * Convenience routine to fill in SMC registers for a given chip select. + */ +void at91_smc_setup(int id, int cs, const struct at91_smc_init *smc); + +/* + * Disable/Enable different External Bus Interfaces (EBI) + */ +void at91_ebi_enable(int cs); +void at91_ebi_disable(int cs); + +#endif /* ARM_AT91_AT91_SMC_H */ diff --git a/sys/arm/at91/files.at91 b/sys/arm/at91/files.at91 index a83aa7a..5533594 100644 --- a/sys/arm/at91/files.at91 +++ b/sys/arm/at91/files.at91 @@ -12,6 +12,7 @@ arm/at91/at91_pit.c optional at91sam9 arm/at91/at91_reset.S optional at91sam9 arm/at91/at91_rst.c optional at91sam9 arm/at91/at91_rtc.c optional at91_rtc +arm/at91/at91_smc.c standard arm/at91/at91_spi.c optional at91_spi \ dependency "spibus_if.h" arm/at91/at91_ssc.c optional at91_ssc |