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mtd: rawnand: atmel: add sam9x60 nand controller support 

The sam9x60 board defines the CCFG_EBICSA register under SFR,
and not as a MATRIX register, as previous boards do.

NAND Flash I/Os are connected to D16–D23, thus
SFR_CCFG_EBICSA.NFD0_ON_D16 is set to 1.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Tudor Ambarus 2019-02-13 09:00:05 +00:00 committed by Miquel Raynal
parent b1e8e0aa15
commit ccf20cccce
1 changed files with 74 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
drivers/mtd/nand/raw/atmel/nand-controller.c
View File

@ -65,6 +65,7 @@
#include <linux/iopoll.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <soc/at91/atmel-sfr.h>
#include "pmecc.h"
@ -232,10 +233,15 @@ to_nand_controller(struct nand_controller *ctl)
return container_of(ctl, struct atmel_nand_controller, base);
}
struct atmel_smc_nand_ebi_csa_cfg {
u32 offs;
u32 nfd0_on_d16;
};
struct atmel_smc_nand_controller {
struct atmel_nand_controller base;
struct regmap *ebi_csa_regmap;
unsigned int ebi_csa_offs;
struct atmel_smc_nand_ebi_csa_cfg *ebi_csa;
};
static inline struct atmel_smc_nand_controller *
@ -1513,8 +1519,15 @@ static void atmel_smc_nand_init(struct atmel_nand_controller *nc,
/* Attach the CS to the NAND Flash logic. */
for (i = 0; i < nand->numcs; i++)
regmap_update_bits(smc_nc->ebi_csa_regmap, smc_nc->ebi_csa_offs,
regmap_update_bits(smc_nc->ebi_csa_regmap,
smc_nc->ebi_csa->offs,
BIT(nand->cs[i].id), BIT(nand->cs[i].id));
if (smc_nc->ebi_csa->nfd0_on_d16)
regmap_update_bits(smc_nc->ebi_csa_regmap,
smc_nc->ebi_csa->offs,
smc_nc->ebi_csa->nfd0_on_d16,
smc_nc->ebi_csa->nfd0_on_d16);
}
static void atmel_hsmc_nand_init(struct atmel_nand_controller *nc,
@ -1834,34 +1847,71 @@ static void atmel_nand_controller_cleanup(struct atmel_nand_controller *nc)
clk_put(nc->mck);
}
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9260_ebi_csa = {
.offs = AT91SAM9260_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9261_ebi_csa = {
.offs = AT91SAM9261_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9263_ebi_csa = {
.offs = AT91SAM9263_MATRIX_EBI0CSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9rl_ebi_csa = {
.offs = AT91SAM9RL_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9g45_ebi_csa = {
.offs = AT91SAM9G45_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9n12_ebi_csa = {
.offs = AT91SAM9N12_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg at91sam9x5_ebi_csa = {
.offs = AT91SAM9X5_MATRIX_EBICSA,
};
static const struct atmel_smc_nand_ebi_csa_cfg sam9x60_ebi_csa = {
.offs = AT91_SFR_CCFG_EBICSA,
.nfd0_on_d16 = AT91_SFR_CCFG_NFD0_ON_D16,
};
static const struct of_device_id atmel_ebi_csa_regmap_of_ids[] = {
{
.compatible = "atmel,at91sam9260-matrix",
.data = (void *)AT91SAM9260_MATRIX_EBICSA,
.data = &at91sam9260_ebi_csa,
},
{
.compatible = "atmel,at91sam9261-matrix",
.data = (void *)AT91SAM9261_MATRIX_EBICSA,
.data = &at91sam9261_ebi_csa,
},
{
.compatible = "atmel,at91sam9263-matrix",
.data = (void *)AT91SAM9263_MATRIX_EBI0CSA,
.data = &at91sam9263_ebi_csa,
},
{
.compatible = "atmel,at91sam9rl-matrix",
.data = (void *)AT91SAM9RL_MATRIX_EBICSA,
.data = &at91sam9rl_ebi_csa,
},
{
.compatible = "atmel,at91sam9g45-matrix",
.data = (void *)AT91SAM9G45_MATRIX_EBICSA,
.data = &at91sam9g45_ebi_csa,
},
{
.compatible = "atmel,at91sam9n12-matrix",
.data = (void *)AT91SAM9N12_MATRIX_EBICSA,
.data = &at91sam9n12_ebi_csa,
},
{
.compatible = "atmel,at91sam9x5-matrix",
.data = (void *)AT91SAM9X5_MATRIX_EBICSA,
.data = &at91sam9x5_ebi_csa,
},
{
.compatible = "microchip,sam9x60-sfr",
.data = &sam9x60_ebi_csa,
},
{ /* sentinel */ },
};
@ -2006,15 +2056,15 @@ atmel_smc_nand_controller_init(struct atmel_smc_nand_controller *nc)
return ret;
}
nc->ebi_csa_offs = (uintptr_t)match->data;
nc->ebi_csa = (struct atmel_smc_nand_ebi_csa_cfg *)match->data;
/*
* The at91sam9263 has 2 EBIs, if the NAND controller is under EBI1
* add 4 to ->ebi_csa_offs.
* add 4 to ->ebi_csa->offs.
*/
if (of_device_is_compatible(dev->parent->of_node,
"atmel,at91sam9263-ebi1"))
nc->ebi_csa_offs += 4;
nc->ebi_csa->offs += 4;
return 0;
}
@ -2377,6 +2427,14 @@ static const struct atmel_nand_controller_caps atmel_sam9g45_nc_caps = {
.ops = &atmel_smc_nc_ops,
};
static const struct atmel_nand_controller_caps microchip_sam9x60_nc_caps = {
.has_dma = true,
.ale_offs = BIT(21),
.cle_offs = BIT(22),
.ebi_csa_regmap_name = "microchip,sfr",
.ops = &atmel_smc_nc_ops,
};
/* Only used to parse old bindings. */
static const struct atmel_nand_controller_caps atmel_rm9200_nand_caps = {
.ale_offs = BIT(21),
@ -2421,6 +2479,10 @@ static const struct of_device_id atmel_nand_controller_of_ids[] = {
.compatible = "atmel,sama5d3-nand-controller",
.data = &atmel_sama5_nc_caps,
},
{
.compatible = "microchip,sam9x60-nand-controller",
.data = &microchip_sam9x60_nc_caps,
},
/* Support for old/deprecated bindings: */
{
.compatible = "atmel,at91rm9200-nand",