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mtd: brcmnand: add extra SoC support to library 

There are a few small hooks required for chips like BCM63138 and the
iProc family. Let's introduce those now.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
This commit is contained in:
Brian Norris 2015-05-12 12:09:28 -07:00
parent 3a52be8a79
commit c26211d37f
2 changed files with 71 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/mtd/nand/brcmnand/brcmnand.c
View File

@ -119,6 +119,9 @@ struct brcmnand_controller {
unsigned int dma_irq;
int nand_version;
/* Some SoCs provide custom interrupt status register(s) */
struct brcmnand_soc *soc;
int cmd_pending;
bool dma_pending;
struct completion done;
@ -965,6 +968,17 @@ static irqreturn_t brcmnand_ctlrdy_irq(int irq, void *data)
return IRQ_HANDLED;
}
/* Handle SoC-specific interrupt hardware */
static irqreturn_t brcmnand_irq(int irq, void *data)
{
struct brcmnand_controller *ctrl = data;
if (ctrl->soc->ctlrdy_ack(ctrl->soc))
return brcmnand_ctlrdy_irq(irq, data);
return IRQ_NONE;
}
static irqreturn_t brcmnand_dma_irq(int irq, void *data)
{
struct brcmnand_controller *ctrl = data;
@ -1153,12 +1167,18 @@ static void brcmnand_cmdfunc(struct mtd_info *mtd, unsigned command,
if (native_cmd == CMD_PARAMETER_READ ||
native_cmd == CMD_PARAMETER_CHANGE_COL) {
int i;
brcmnand_soc_data_bus_prepare(ctrl->soc);
/*
* Must cache the FLASH_CACHE now, since changes in
* SECTOR_SIZE_1K may invalidate it
*/
for (i = 0; i < FC_WORDS; i++)
ctrl->flash_cache[i] = brcmnand_read_fc(ctrl, i);
brcmnand_soc_data_bus_unprepare(ctrl->soc);
/* Cleanup from HW quirk: restore SECTOR_SIZE_1K */
if (host->hwcfg.sector_size_1k)
brcmnand_set_sector_size_1k(host,
@ -1371,10 +1391,15 @@ static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
brcmnand_send_cmd(host, CMD_PAGE_READ);
brcmnand_waitfunc(mtd, chip);
if (likely(buf))
if (likely(buf)) {
brcmnand_soc_data_bus_prepare(ctrl->soc);
for (j = 0; j < FC_WORDS; j++, buf++)
*buf = brcmnand_read_fc(ctrl, j);
brcmnand_soc_data_bus_unprepare(ctrl->soc);
}
if (oob)
oob += read_oob_from_regs(ctrl, i, oob,
mtd->oobsize / trans,
@ -1546,12 +1571,17 @@ static int brcmnand_write(struct mtd_info *mtd, struct nand_chip *chip,
lower_32_bits(addr));
(void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
if (buf)
if (buf) {
brcmnand_soc_data_bus_prepare(ctrl->soc);
for (j = 0; j < FC_WORDS; j++, buf++)
brcmnand_write_fc(ctrl, j, *buf);
else if (oob)
brcmnand_soc_data_bus_unprepare(ctrl->soc);
} else if (oob) {
for (j = 0; j < FC_WORDS; j++)
brcmnand_write_fc(ctrl, j, 0xffffffff);
}
if (oob) {
oob += write_oob_to_regs(ctrl, i, oob,
@ -1995,6 +2025,11 @@ static int brcmnand_resume(struct device *dev)
brcmnand_write_reg(ctrl, BRCMNAND_CS_XOR, ctrl->nand_cs_nand_xor);
brcmnand_write_reg(ctrl, BRCMNAND_CORR_THRESHOLD,
ctrl->corr_stat_threshold);
if (ctrl->soc) {
/* Clear/re-enable interrupt */
ctrl->soc->ctlrdy_ack(ctrl->soc);
ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
}
list_for_each_entry(host, &ctrl->host_list, node) {
struct mtd_info *mtd = &host->mtd;
@ -2139,8 +2174,24 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
return -ENODEV;
}
ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0,
DRV_NAME, ctrl);
/*
* Some SoCs integrate this controller (e.g., its interrupt bits) in
* interesting ways
*/
if (soc) {
ctrl->soc = soc;
ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0,
DRV_NAME, ctrl);
/* Enable interrupt */
ctrl->soc->ctlrdy_ack(ctrl->soc);
ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
} else {
/* Use standard interrupt infrastructure */
ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0,
DRV_NAME, ctrl);
}
if (ret < 0) {
dev_err(dev, "can't allocate IRQ %d: error %d\n",
ctrl->irq, ret);

15
drivers/mtd/nand/brcmnand/brcmnand.h
View File

@ -23,8 +23,23 @@ struct dev_pm_ops;
struct brcmnand_soc {
struct platform_device *pdev;
void *priv;
bool (*ctlrdy_ack)(struct brcmnand_soc *soc);
void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare);
};
static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc)
{
if (soc && soc->prepare_data_bus)
soc->prepare_data_bus(soc, true);
}
static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc)
{
if (soc && soc->prepare_data_bus)
soc->prepare_data_bus(soc, false);
}
static inline u32 brcmnand_readl(void __iomem *addr)
{
/*