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fsl_ifc: Support all 8 IFC chip selects 

Freescale's QorIQ T Series processors support 8 IFC chip selects
within a memory map backward compatible with previous P Series
processors which supported only 4 chip selects.

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
hifive-unleashed-5.1
Aaron Sierra 2014-08-26 18:18:33 -05:00 committed by Brian Norris
parent abb1cd00e6
commit 096916610f
3 changed files with 31 additions and 13 deletions
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13
drivers/memory/fsl_ifc.c
View File

@ -61,7 +61,7 @@ int fsl_ifc_find(phys_addr_t addr_base)
if (!fsl_ifc_ctrl_dev || !fsl_ifc_ctrl_dev->regs)
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(fsl_ifc_ctrl_dev->regs->cspr_cs); i++) {
for (i = 0; i < fsl_ifc_ctrl_dev->banks; i++) {
u32 cspr = in_be32(&fsl_ifc_ctrl_dev->regs->cspr_cs[i].cspr);
if (cspr & CSPR_V && (cspr & CSPR_BA) ==
convert_ifc_address(addr_base))
@ -213,7 +213,7 @@ static irqreturn_t fsl_ifc_ctrl_irq(int irqno, void *data)
static int fsl_ifc_ctrl_probe(struct platform_device *dev)
{
int ret = 0;
int version, banks;
dev_info(&dev->dev, "Freescale Integrated Flash Controller\n");
@ -231,6 +231,15 @@ static int fsl_ifc_ctrl_probe(struct platform_device *dev)
goto err;
}
version = ioread32be(&fsl_ifc_ctrl_dev->regs->ifc_rev) &
FSL_IFC_VERSION_MASK;
banks = (version == FSL_IFC_VERSION_1_0_0) ? 4 : 8;
dev_info(&dev->dev, "IFC version %d.%d, %d banks\n",
version >> 24, (version >> 16) & 0xf, banks);
fsl_ifc_ctrl_dev->version = version;
fsl_ifc_ctrl_dev->banks = banks;
/* get the Controller level irq */
fsl_ifc_ctrl_dev->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
if (fsl_ifc_ctrl_dev->irq == NO_IRQ) {

10
drivers/mtd/nand/fsl_ifc_nand.c
View File

@ -31,7 +31,6 @@
#include <linux/mtd/nand_ecc.h>
#include <linux/fsl_ifc.h>
#define FSL_IFC_V1_1_0 0x01010000
#define ERR_BYTE 0xFF /* Value returned for read
bytes when read failed */
#define IFC_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait
@ -877,7 +876,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
struct fsl_ifc_regs __iomem *ifc = ctrl->regs;
struct nand_chip *chip = &priv->chip;
struct nand_ecclayout *layout;
u32 csor, ver;
u32 csor;
/* Fill in fsl_ifc_mtd structure */
priv->mtd.priv = chip;
@ -984,8 +983,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
chip->ecc.mode = NAND_ECC_SOFT;
}
ver = ioread32be(&ifc->ifc_rev);
if (ver == FSL_IFC_V1_1_0)
if (ctrl->version == FSL_IFC_VERSION_1_1_0)
fsl_ifc_sram_init(priv);
return 0;
@ -1045,12 +1043,12 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
}
/* find which chip select it is connected to */
for (bank = 0; bank < FSL_IFC_BANK_COUNT; bank++) {
for (bank = 0; bank < fsl_ifc_ctrl_dev->banks; bank++) {
if (match_bank(ifc, bank, res.start))
break;
}
if (bank >= FSL_IFC_BANK_COUNT) {
if (bank >= fsl_ifc_ctrl_dev->banks) {
dev_err(&dev->dev, "%s: address did not match any chip selects\n",
__func__);
return -ENODEV;

21
include/linux/fsl_ifc.h
View File

@ -29,7 +29,16 @@
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#define FSL_IFC_BANK_COUNT 4
/*
* The actual number of banks implemented depends on the IFC version
* - IFC version 1.0 implements 4 banks.
* - IFC version 1.1 onward implements 8 banks.
*/
#define FSL_IFC_BANK_COUNT 8
#define FSL_IFC_VERSION_MASK 0x0F0F0000
#define FSL_IFC_VERSION_1_0_0 0x01000000
#define FSL_IFC_VERSION_1_1_0 0x01010000
/*
* CSPR - Chip Select Property Register
@ -776,23 +785,23 @@ struct fsl_ifc_regs {
__be32 cspr;
u32 res2;
} cspr_cs[FSL_IFC_BANK_COUNT];
u32 res3[0x19];
u32 res3[0xd];
struct {
__be32 amask;
u32 res4[0x2];
} amask_cs[FSL_IFC_BANK_COUNT];
u32 res5[0x18];
u32 res5[0xc];
struct {
__be32 csor;
__be32 csor_ext;
u32 res6;
} csor_cs[FSL_IFC_BANK_COUNT];
u32 res7[0x18];
u32 res7[0xc];
struct {
__be32 ftim[4];
u32 res8[0x8];
} ftim_cs[FSL_IFC_BANK_COUNT];
u32 res9[0x60];
u32 res9[0x30];
__be32 rb_stat;
u32 res10[0x2];
__be32 ifc_gcr;
@ -827,6 +836,8 @@ struct fsl_ifc_ctrl {
int nand_irq;
spinlock_t lock;
void *nand;
int version;
int banks;
u32 nand_stat;
wait_queue_head_t nand_wait;