diff options
Diffstat (limited to 'arch/arm/mach-at91/sam9_smc.c')
-rw-r--r-- | arch/arm/mach-at91/sam9_smc.c | 128 |
1 files changed, 107 insertions, 21 deletions
diff --git a/arch/arm/mach-at91/sam9_smc.c b/arch/arm/mach-at91/sam9_smc.c index 5eab6aa621d0..99a0a1d2b7dc 100644 --- a/arch/arm/mach-at91/sam9_smc.c +++ b/arch/arm/mach-at91/sam9_smc.c @@ -2,6 +2,7 @@ * linux/arch/arm/mach-at91/sam9_smc.c * * Copyright (C) 2008 Andrew Victor + * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -10,38 +11,123 @@ #include <linux/module.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <mach/at91sam9_smc.h> #include "sam9_smc.h" -void __init sam9_smc_configure(int cs, struct sam9_smc_config* config) + +#define AT91_SMC_CS(id, n) (smc_base_addr[id] + ((n) * 0x10)) + +static void __iomem *smc_base_addr[2]; + +static void sam9_smc_cs_write_mode(void __iomem *base, + struct sam9_smc_config *config) +{ + __raw_writel(config->mode + | AT91_SMC_TDF_(config->tdf_cycles), + base + AT91_SMC_MODE); +} + +void sam9_smc_write_mode(int id, int cs, + struct sam9_smc_config *config) +{ + sam9_smc_cs_write_mode(AT91_SMC_CS(id, cs), config); +} + +static void sam9_smc_cs_configure(void __iomem *base, + struct sam9_smc_config *config) +{ + + /* Setup register */ + __raw_writel(AT91_SMC_NWESETUP_(config->nwe_setup) + | AT91_SMC_NCS_WRSETUP_(config->ncs_write_setup) + | AT91_SMC_NRDSETUP_(config->nrd_setup) + | AT91_SMC_NCS_RDSETUP_(config->ncs_read_setup), + base + AT91_SMC_SETUP); + + /* Pulse register */ + __raw_writel(AT91_SMC_NWEPULSE_(config->nwe_pulse) + | AT91_SMC_NCS_WRPULSE_(config->ncs_write_pulse) + | AT91_SMC_NRDPULSE_(config->nrd_pulse) + | AT91_SMC_NCS_RDPULSE_(config->ncs_read_pulse), + base + AT91_SMC_PULSE); + + /* Cycle register */ + __raw_writel(AT91_SMC_NWECYCLE_(config->write_cycle) + | AT91_SMC_NRDCYCLE_(config->read_cycle), + base + AT91_SMC_CYCLE); + + /* Mode register */ + sam9_smc_cs_write_mode(base, config); +} + +void sam9_smc_configure(int id, int cs, + struct sam9_smc_config *config) { + sam9_smc_cs_configure(AT91_SMC_CS(id, cs), config); +} + +static void sam9_smc_cs_read_mode(void __iomem *base, + struct sam9_smc_config *config) +{ + u32 val = __raw_readl(base + AT91_SMC_MODE); + + config->mode = (val & ~AT91_SMC_NWECYCLE); + config->tdf_cycles = (val & AT91_SMC_NWECYCLE) >> 16 ; +} + +void sam9_smc_read_mode(int id, int cs, + struct sam9_smc_config *config) +{ + sam9_smc_cs_read_mode(AT91_SMC_CS(id, cs), config); +} + +static void sam9_smc_cs_read(void __iomem *base, + struct sam9_smc_config *config) +{ + u32 val; + /* Setup register */ - at91_sys_write(AT91_SMC_SETUP(cs), - AT91_SMC_NWESETUP_(config->nwe_setup) - | AT91_SMC_NCS_WRSETUP_(config->ncs_write_setup) - | AT91_SMC_NRDSETUP_(config->nrd_setup) - | AT91_SMC_NCS_RDSETUP_(config->ncs_read_setup) - ); + val = __raw_readl(base + AT91_SMC_SETUP); + + config->nwe_setup = val & AT91_SMC_NWESETUP; + config->ncs_write_setup = (val & AT91_SMC_NCS_WRSETUP) >> 8; + config->nrd_setup = (val & AT91_SMC_NRDSETUP) >> 16; + config->ncs_read_setup = (val & AT91_SMC_NCS_RDSETUP) >> 24; /* Pulse register */ - at91_sys_write(AT91_SMC_PULSE(cs), - AT91_SMC_NWEPULSE_(config->nwe_pulse) - | AT91_SMC_NCS_WRPULSE_(config->ncs_write_pulse) - | AT91_SMC_NRDPULSE_(config->nrd_pulse) - | AT91_SMC_NCS_RDPULSE_(config->ncs_read_pulse) - ); + val = __raw_readl(base + AT91_SMC_PULSE); + + config->nwe_setup = val & AT91_SMC_NWEPULSE; + config->ncs_write_pulse = (val & AT91_SMC_NCS_WRPULSE) >> 8; + config->nrd_pulse = (val & AT91_SMC_NRDPULSE) >> 16; + config->ncs_read_pulse = (val & AT91_SMC_NCS_RDPULSE) >> 24; /* Cycle register */ - at91_sys_write(AT91_SMC_CYCLE(cs), - AT91_SMC_NWECYCLE_(config->write_cycle) - | AT91_SMC_NRDCYCLE_(config->read_cycle) - ); + val = __raw_readl(base + AT91_SMC_CYCLE); + + config->write_cycle = val & AT91_SMC_NWECYCLE; + config->read_cycle = (val & AT91_SMC_NRDCYCLE) >> 16; /* Mode register */ - at91_sys_write(AT91_SMC_MODE(cs), - config->mode - | AT91_SMC_TDF_(config->tdf_cycles) - ); + sam9_smc_cs_read_mode(base, config); +} + +void sam9_smc_read(int id, int cs, struct sam9_smc_config *config) +{ + sam9_smc_cs_read(AT91_SMC_CS(id, cs), config); +} + +void __init at91sam9_ioremap_smc(int id, u32 addr) +{ + if (id > 1) { + pr_warn("%s: id > 2\n", __func__); + return; + } + smc_base_addr[id] = ioremap(addr, 512); + if (!smc_base_addr[id]) + pr_warn("Impossible to ioremap smc.%d 0x%x\n", id, addr); } |