diff options
author | Romain Izard <romain.izard.pro@gmail.com> | 2016-02-10 09:56:23 (GMT) |
---|---|---|
committer | Brian Norris <computersforpeace@gmail.com> | 2016-02-12 18:27:46 (GMT) |
commit | 5ddc7bd43ccc77173f149483fa27a0b8f85e09e5 (patch) | |
tree | 5a15caea44b69fa85a4b752480dd53621ed23910 /drivers/mtd | |
parent | ed4eeba7338bb123090f1c8b208f64d8184a896d (diff) | |
download | linux-5ddc7bd43ccc77173f149483fa27a0b8f85e09e5.tar.xz |
mtd: atmel_nand: Support variable RB_EDGE interrupts
The NFC controller used to accelerate the NAND transfers on SAMA5 chips
can use either RB_EDGE0 or RB_EDGE3 as its ready/busy interrupt bit.
Use the controller's compatible string to select the correct bit.
For the binding:
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Wenyou Yang <Wenyou.yang@atmel.com>
Tested-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 35 | ||||
-rw-r--r-- | drivers/mtd/nand/atmel_nand_nfc.h | 3 |
2 files changed, 29 insertions, 9 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index affe7a7..06a3e11 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -67,6 +67,10 @@ struct atmel_nand_caps { bool pmecc_correct_erase_page; }; +struct atmel_nand_nfc_caps { + uint32_t rb_mask; +}; + /* oob layout for large page size * bad block info is on bytes 0 and 1 * the bytes have to be consecutives to avoid @@ -111,6 +115,7 @@ struct atmel_nfc { /* Point to the sram bank which include readed data via NFC */ void *data_in_sram; bool will_write_sram; + const struct atmel_nand_nfc_caps *caps; }; static struct atmel_nfc nand_nfc; @@ -1675,9 +1680,9 @@ static irqreturn_t hsmc_interrupt(int irq, void *dev_id) nfc_writel(host->nfc->hsmc_regs, IDR, NFC_SR_XFR_DONE); ret = IRQ_HANDLED; } - if (pending & NFC_SR_RB_EDGE) { + if (pending & host->nfc->caps->rb_mask) { complete(&host->nfc->comp_ready); - nfc_writel(host->nfc->hsmc_regs, IDR, NFC_SR_RB_EDGE); + nfc_writel(host->nfc->hsmc_regs, IDR, host->nfc->caps->rb_mask); ret = IRQ_HANDLED; } if (pending & NFC_SR_CMD_DONE) { @@ -1695,7 +1700,7 @@ static void nfc_prepare_interrupt(struct atmel_nand_host *host, u32 flag) if (flag & NFC_SR_XFR_DONE) init_completion(&host->nfc->comp_xfer_done); - if (flag & NFC_SR_RB_EDGE) + if (flag & host->nfc->caps->rb_mask) init_completion(&host->nfc->comp_ready); if (flag & NFC_SR_CMD_DONE) @@ -1713,7 +1718,7 @@ static int nfc_wait_interrupt(struct atmel_nand_host *host, u32 flag) if (flag & NFC_SR_XFR_DONE) comp[index++] = &host->nfc->comp_xfer_done; - if (flag & NFC_SR_RB_EDGE) + if (flag & host->nfc->caps->rb_mask) comp[index++] = &host->nfc->comp_ready; if (flag & NFC_SR_CMD_DONE) @@ -1781,7 +1786,7 @@ static int nfc_device_ready(struct mtd_info *mtd) dev_err(host->dev, "Lost the interrupt flags: 0x%08x\n", mask & status); - return status & NFC_SR_RB_EDGE; + return status & host->nfc->caps->rb_mask; } static void nfc_select_chip(struct mtd_info *mtd, int chip) @@ -1954,8 +1959,8 @@ static void nfc_nand_command(struct mtd_info *mtd, unsigned int command, } /* fall through */ default: - nfc_prepare_interrupt(host, NFC_SR_RB_EDGE); - nfc_wait_interrupt(host, NFC_SR_RB_EDGE); + nfc_prepare_interrupt(host, host->nfc->caps->rb_mask); + nfc_wait_interrupt(host, host->nfc->caps->rb_mask); } } @@ -2352,6 +2357,11 @@ static int atmel_nand_nfc_probe(struct platform_device *pdev) } } + nfc->caps = (const struct atmel_nand_nfc_caps *) + of_device_get_match_data(&pdev->dev); + if (!nfc->caps) + return -ENODEV; + nfc_writel(nfc->hsmc_regs, IDR, 0xffffffff); nfc_readl(nfc->hsmc_regs, SR); /* clear the NFC_SR */ @@ -2380,8 +2390,17 @@ static int atmel_nand_nfc_remove(struct platform_device *pdev) return 0; } +static const struct atmel_nand_nfc_caps sama5d3_nfc_caps = { + .rb_mask = NFC_SR_RB_EDGE0, +}; + +static const struct atmel_nand_nfc_caps sama5d4_nfc_caps = { + .rb_mask = NFC_SR_RB_EDGE3, +}; + static const struct of_device_id atmel_nand_nfc_match[] = { - { .compatible = "atmel,sama5d3-nfc" }, + { .compatible = "atmel,sama5d3-nfc", .data = &sama5d3_nfc_caps }, + { .compatible = "atmel,sama5d4-nfc", .data = &sama5d4_nfc_caps }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, atmel_nand_nfc_match); diff --git a/drivers/mtd/nand/atmel_nand_nfc.h b/drivers/mtd/nand/atmel_nand_nfc.h index 4d5d262..0bbc1fa 100644 --- a/drivers/mtd/nand/atmel_nand_nfc.h +++ b/drivers/mtd/nand/atmel_nand_nfc.h @@ -42,7 +42,8 @@ #define NFC_SR_UNDEF (1 << 21) #define NFC_SR_AWB (1 << 22) #define NFC_SR_ASE (1 << 23) -#define NFC_SR_RB_EDGE (1 << 24) +#define NFC_SR_RB_EDGE0 (1 << 24) +#define NFC_SR_RB_EDGE3 (1 << 27) #define ATMEL_HSMC_NFC_IER 0x0c #define ATMEL_HSMC_NFC_IDR 0x10 |