[PATCH v2] mtd: brcmnand: Add v7.2 controller support

From: Florian Fainelli
Date: Tue May 31 2016 - 13:30:48 EST

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The 7.2 controller differs in a few area compared to its predecssor (7.1):

- NAND scrambler, which we are not using just yet
- higher ECC levels (up to 120 bits) per 1KB data blocks, also not supported yet
- up to 128B OOB

This patchs adds the ncessary code to support such a controller
generation and updates the Device Tree binding.

Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
Changes in v2:

- fixed a bunch of conditionals on the versions which should
have been exclusive (spotted by Thomas)

.../devicetree/bindings/mtd/brcm,brcmnand.txt | 1 +
drivers/mtd/nand/brcmnand/brcmnand.c | 91 ++++++++++++++++++----
2 files changed, 78 insertions(+), 14 deletions(-)

diff --git a/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt
index deb24cbdda82..c8d71e75cb09 100644
--- a/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt
+++ b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt
@@ -27,6 +27,7 @@ Required properties:
brcm,brcmnand-v6.2
brcm,brcmnand-v7.0
brcm,brcmnand-v7.1
+ brcm,brcmnand-v7.2
brcm,brcmnand
- reg : the register start and length for NAND register region.
(optional) Flash DMA register range (if present)
diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c
index b76ad7c0144f..0a54a0f5a4b1 100644
--- a/drivers/mtd/nand/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/brcmnand/brcmnand.c
@@ -340,6 +340,36 @@ static const u16 brcmnand_regs_v71[] = {
[BRCMNAND_FC_BASE] = 0x400,
};

+/* BRCMNAND v7.2 */
+static const u16 brcmnand_regs_v72[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x14,
+ [BRCMNAND_CS_SELECT] = 0x18,
+ [BRCMNAND_CS_XOR] = 0x1c,
+ [BRCMNAND_LL_OP] = 0x20,
+ [BRCMNAND_CS0_BASE] = 0x50,
+ [BRCMNAND_CS1_BASE] = 0,
+ [BRCMNAND_CORR_THRESHOLD] = 0xdc,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0xe0,
+ [BRCMNAND_UNCORR_COUNT] = 0xfc,
+ [BRCMNAND_CORR_COUNT] = 0x100,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x10c,
+ [BRCMNAND_CORR_ADDR] = 0x110,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x114,
+ [BRCMNAND_UNCORR_ADDR] = 0x118,
+ [BRCMNAND_SEMAPHORE] = 0x150,
+ [BRCMNAND_ID] = 0x194,
+ [BRCMNAND_ID_EXT] = 0x198,
+ [BRCMNAND_LL_RDATA] = 0x19c,
+ [BRCMNAND_OOB_READ_BASE] = 0x200,
+ [BRCMNAND_OOB_READ_10_BASE] = 0,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x400,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0,
+ [BRCMNAND_FC_BASE] = 0x600,
+};
+
enum brcmnand_cs_reg {
BRCMNAND_CS_CFG_EXT = 0,
BRCMNAND_CS_CFG,
@@ -435,7 +465,9 @@ static int brcmnand_revision_init(struct brcmnand_controller *ctrl)
}

/* Register offsets */
- if (ctrl->nand_version >= 0x0701)
+ if (ctrl->nand_version >= 0x0702)
+ ctrl->reg_offsets = brcmnand_regs_v72;
+ else if (ctrl->nand_version >= 0x0701)
ctrl->reg_offsets = brcmnand_regs_v71;
else if (ctrl->nand_version >= 0x0600)
ctrl->reg_offsets = brcmnand_regs_v60;
@@ -480,7 +512,9 @@ static int brcmnand_revision_init(struct brcmnand_controller *ctrl)
}

/* Maximum spare area sector size (per 512B) */
- if (ctrl->nand_version >= 0x0600)
+ if (ctrl->nand_version >= 0x0702)
+ ctrl->max_oob = 128;
+ else if (ctrl->nand_version >= 0x0600)
ctrl->max_oob = 64;
else if (ctrl->nand_version >= 0x0500)
ctrl->max_oob = 32;
@@ -583,14 +617,20 @@ static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val)
enum brcmnand_reg reg = BRCMNAND_CORR_THRESHOLD;
int cs = host->cs;

- if (ctrl->nand_version >= 0x0600)
+ if (ctrl->nand_version >= 0x0702)
+ bits = 7;
+ else if (ctrl->nand_version >= 0x0600)
bits = 6;
else if (ctrl->nand_version >= 0x0500)
bits = 5;
else
bits = 4;

- if (ctrl->nand_version >= 0x0600) {
+ if (ctrl->nand_version >= 0x0702) {
+ if (cs >= 4)
+ reg = BRCMNAND_CORR_THRESHOLD_EXT;
+ shift = (cs % 4) * bits;
+ } else if (ctrl->nand_version >= 0x0600) {
if (cs >= 5)
reg = BRCMNAND_CORR_THRESHOLD_EXT;
shift = (cs % 5) * bits;
@@ -631,19 +671,28 @@ enum {

static inline u32 brcmnand_spare_area_mask(struct brcmnand_controller *ctrl)
{
- if (ctrl->nand_version >= 0x0600)
+ if (ctrl->nand_version >= 0x0702)
+ return GENMASK(7, 0);
+ else if (ctrl->nand_version >= 0x0600)
return GENMASK(6, 0);
else
return GENMASK(5, 0);
}

#define NAND_ACC_CONTROL_ECC_SHIFT 16
+#define NAND_ACC_CONTROL_ECC_EXT_SHIFT 13

static inline u32 brcmnand_ecc_level_mask(struct brcmnand_controller *ctrl)
{
u32 mask = (ctrl->nand_version >= 0x0600) ? 0x1f : 0x0f;

- return mask << NAND_ACC_CONTROL_ECC_SHIFT;
+ mask <<= NAND_ACC_CONTROL_ECC_SHIFT;
+
+ /* v7.2 includes additional ECC levels */
+ if (ctrl->nand_version >= 0x0702)
+ mask |= 0x7 << NAND_ACC_CONTROL_ECC_EXT_SHIFT;
+
+ return mask;
}

static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en)
@@ -667,7 +716,9 @@ static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en)

static inline int brcmnand_sector_1k_shift(struct brcmnand_controller *ctrl)
{
- if (ctrl->nand_version >= 0x0600)
+ if (ctrl->nand_version >= 0x0702)
+ return 9;
+ else if (ctrl->nand_version >= 0x0600)
return 7;
else if (ctrl->nand_version >= 0x0500)
return 6;
@@ -773,10 +824,16 @@ enum brcmnand_llop_type {
* Internal support functions
***********************************************************************/

-static inline bool is_hamming_ecc(struct brcmnand_cfg *cfg)
+static inline bool is_hamming_ecc(struct brcmnand_controller *ctrl,
+ struct brcmnand_cfg *cfg)
{
- return cfg->sector_size_1k == 0 && cfg->spare_area_size == 16 &&
- cfg->ecc_level == 15;
+ if (ctrl->nand_version <= 0x0701)
+ return cfg->sector_size_1k == 0 && cfg->spare_area_size == 16 &&
+ cfg->ecc_level == 15;
+ else
+ return cfg->sector_size_1k == 0 && ((cfg->spare_area_size == 16 &&
+ cfg->ecc_level == 15) ||
+ (cfg->spare_area_size == 28 && cfg->ecc_level == 16));
}

/*
@@ -931,7 +988,7 @@ static int brcmstb_choose_ecc_layout(struct brcmnand_host *host)
if (p->sector_size_1k)
ecc_level <<= 1;

- if (is_hamming_ecc(p)) {
+ if (is_hamming_ecc(host->ctrl, p)) {
ecc->bytes = 3 * sectors;
mtd_set_ooblayout(mtd, &brcmnand_hamming_ooblayout_ops);
return 0;
@@ -1857,7 +1914,8 @@ static int brcmnand_set_cfg(struct brcmnand_host *host,
return 0;
}

-static void brcmnand_print_cfg(char *buf, struct brcmnand_cfg *cfg)
+static void brcmnand_print_cfg(struct brcmnand_host *host,
+ char *buf, struct brcmnand_cfg *cfg)
{
buf += sprintf(buf,
"%lluMiB total, %uKiB blocks, %u%s pages, %uB OOB, %u-bit",
@@ -1868,7 +1926,7 @@ static void brcmnand_print_cfg(char *buf, struct brcmnand_cfg *cfg)
cfg->spare_area_size, cfg->device_width);

/* Account for Hamming ECC and for BCH 512B vs 1KiB sectors */
- if (is_hamming_ecc(cfg))
+ if (is_hamming_ecc(host->ctrl, cfg))
sprintf(buf, ", Hamming ECC");
else if (cfg->sector_size_1k)
sprintf(buf, ", BCH-%u (1KiB sector)", cfg->ecc_level << 1);
@@ -1987,7 +2045,7 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)

brcmnand_set_ecc_enabled(host, 1);

- brcmnand_print_cfg(msg, cfg);
+ brcmnand_print_cfg(host, msg, cfg);
dev_info(ctrl->dev, "detected %s\n", msg);

/* Configure ACC_CONTROL */
@@ -1995,6 +2053,10 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
tmp = nand_readreg(ctrl, offs);
tmp &= ~ACC_CONTROL_PARTIAL_PAGE;
tmp &= ~ACC_CONTROL_RD_ERASED;
+
+ /* We need to turn on Read from erased paged protected by ECC */
+ if (ctrl->nand_version >= 0x0702)
+ tmp |= ACC_CONTROL_RD_ERASED;
tmp &= ~ACC_CONTROL_FAST_PGM_RDIN;
if (ctrl->features & BRCMNAND_HAS_PREFETCH) {
/*
@@ -2195,6 +2257,7 @@ static const struct of_device_id brcmnand_of_match[] = {
{ .compatible = "brcm,brcmnand-v6.2" },
{ .compatible = "brcm,brcmnand-v7.0" },
{ .compatible = "brcm,brcmnand-v7.1" },
+ { .compatible = "brcm,brcmnand-v7.2" },
{},
};
MODULE_DEVICE_TABLE(of, brcmnand_of_match);
--
2.7.4

Next message: Andrew F. Davis: "[PATCH 2/2] i2c: sm-usb-dig: add TI SM-USB-DIG I2C bus driver"
Previous message: Mark Rutland: "Re: [PATCH 2/3] drivers/perf: arm_pmu: Defer the setting of __oprofile_cpu_pmu"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]