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ARM: at91: add accessor to manage SMC

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SMC, Static Memory Controller will need more accessors to fine
configure its parameters.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2011-11-27 19:29:57 +08:00 committed by Nicolas Ferre
parent 2dcc90e6ac
commit 59594e13e4
3 changed files with 100 additions and 28 deletions
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29
arch/arm/mach-at91/include/mach/at91sam9_smc.h
View file

@ -18,6 +18,35 @@
#include <mach/cpu.h>
#ifndef __ASSEMBLY__
struct sam9_smc_config {
/* Setup register */
u8 ncs_read_setup;
u8 nrd_setup;
u8 ncs_write_setup;
u8 nwe_setup;
/* Pulse register */
u8 ncs_read_pulse;
u8 nrd_pulse;
u8 ncs_write_pulse;
u8 nwe_pulse;
/* Cycle register */
u16 read_cycle;
u16 write_cycle;
/* Mode register */
u32 mode;
u8 tdf_cycles:4;
};
extern void sam9_smc_configure(int id, int cs, struct sam9_smc_config *config);
extern void sam9_smc_read(int id, int cs, struct sam9_smc_config *config);
extern void sam9_smc_read_mode(int id, int cs, struct sam9_smc_config *config);
extern void sam9_smc_write_mode(int id, int cs, struct sam9_smc_config *config);
#endif
#define AT91_SMC_SETUP 0x00 /* Setup Register for CS n */
#define AT91_SMC_NWESETUP (0x3f << 0) /* NWE Setup Length */
#define AT91_SMC_NWESETUP_(x) ((x) << 0)

76
arch/arm/mach-at91/sam9_smc.c
View file

@ -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
@ -22,7 +23,22 @@
static void __iomem *smc_base_addr[2];
static void __init sam9_smc_cs_configure(void __iomem *base, struct sam9_smc_config* config)
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 */
@ -45,16 +61,66 @@ static void __init sam9_smc_cs_configure(void __iomem *base, struct sam9_smc_con
base + AT91_SMC_CYCLE);
/* Mode register */
__raw_writel(config->mode
| AT91_SMC_TDF_(config->tdf_cycles),
base + AT91_SMC_MODE);
sam9_smc_cs_write_mode(base, config);
}
void __init sam9_smc_configure(int id, int cs, struct sam9_smc_config* 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 */
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 */
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 */
val = __raw_readl(base + AT91_SMC_CYCLE);
config->write_cycle = val & AT91_SMC_NWECYCLE;
config->read_cycle = (val & AT91_SMC_NRDCYCLE) >> 16;
/* Mode register */
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) {

23
arch/arm/mach-at91/sam9_smc.h
View file

@ -8,27 +8,4 @@
* published by the Free Software Foundation.
*/
struct sam9_smc_config {
/* Setup register */
u8 ncs_read_setup;
u8 nrd_setup;
u8 ncs_write_setup;
u8 nwe_setup;
/* Pulse register */
u8 ncs_read_pulse;
u8 nrd_pulse;
u8 ncs_write_pulse;
u8 nwe_pulse;
/* Cycle register */
u16 read_cycle;
u16 write_cycle;
/* Mode register */
u32 mode;
u8 tdf_cycles:4;
};
extern void __init sam9_smc_configure(int id, int cs, struct sam9_smc_config* config);
extern void __init at91sam9_ioremap_smc(int id, u32 addr);