[U-Boot] [PATCH 09/18] mxc_ocotp: Update driver to support OCOTP controller on i.MX7ULP

From: Ye Li ye.li@nxp.com

Update the mxc_ocotp driver to support i.MX7ULP. The read/write sequence has some changes due to PDN and OUT_STATUS registers added and TIME register is removed. Also update the bank size and number.

Signed-off-by: Peng Fan peng.fan@nxp.com Signed-off-by: Ye Li ye.li@nxp.com Cc: Stefano Babic sbabic@denx.de --- drivers/misc/mxc_ocotp.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+)

diff --git a/drivers/misc/mxc_ocotp.c b/drivers/misc/mxc_ocotp.c index 0b1c050..7761778 100644 --- a/drivers/misc/mxc_ocotp.c +++ b/drivers/misc/mxc_ocotp.c @@ -29,6 +29,12 @@ #ifdef CONFIG_MX7 #define BM_CTRL_ADDR 0x0000000f #define BM_CTRL_RELOAD 0x00000400 +#elif defined(CONFIG_MX7ULP) +#define BM_CTRL_ADDR 0x000000FF +#define BM_CTRL_RELOAD 0x00000400 +#define BM_OUT_STATUS_DED 0x00000400 +#define BM_OUT_STATUS_LOCKED 0x00000800 +#define BM_OUT_STATUS_PROGFAIL 0x00001000 #else #define BM_CTRL_ADDR 0x0000007f #endif @@ -70,6 +76,9 @@ #elif defined CONFIG_MX7 #define FUSE_BANK_SIZE 0x40 #define FUSE_BANKS 16 +#elif defined(CONFIG_MX7ULP) +#define FUSE_BANK_SIZE 0x80 +#define FUSE_BANKS 31 #else #error "Unsupported architecture\n" #endif @@ -187,6 +196,10 @@ static int finish_access(struct ocotp_regs *regs, const char *caller) err = !!(readl(&regs->ctrl) & BM_CTRL_ERROR); clear_error(regs);

+#ifdef CONFIG_MX7ULP + /* Need to power down the OTP memory */ + writel(1, &regs->pdn); +#endif if (err) { printf("mxc_ocotp %s(): Access protect error\n", caller); return -EIO; @@ -217,6 +230,13 @@ int fuse_read(u32 bank, u32 word, u32 *val)

*val = readl(&regs->bank[phy_bank].fuse_regs[phy_word << 2]);

+#ifdef CONFIG_MX7ULP + if (readl(&regs->out_status) & BM_OUT_STATUS_DED) { + writel(BM_OUT_STATUS_DED, &regs->out_status_clr); + printf("mxc_ocotp %s(): fuse read wrong\n", __func__); + return -EIO; + } +#endif return finish_access(regs, __func__); }

@@ -238,6 +258,12 @@ static void set_timing(struct ocotp_regs *regs) clrsetbits_le32(&regs->timing, BM_TIMING_FSOURCE | BM_TIMING_PROG, timing); } +#elif defined(CONFIG_MX7ULP) +static void set_timing(struct ocotp_regs *regs) +{ + /* No timing set for MX7ULP */ +} + #else static void set_timing(struct ocotp_regs *regs) { @@ -302,6 +328,14 @@ int fuse_sense(u32 bank, u32 word, u32 *val) *val = readl(&regs->read_fuse_data); #endif

+#ifdef CONFIG_MX7ULP + if (readl(&regs->out_status) & BM_OUT_STATUS_DED) { + writel(BM_OUT_STATUS_DED, &regs->out_status_clr); + printf("mxc_ocotp %s(): fuse read wrong\n", __func__); + return -EIO; + } +#endif + return finish_access(regs, __func__); }

@@ -355,6 +389,14 @@ int fuse_prog(u32 bank, u32 word, u32 val) #endif udelay(WRITE_POSTAMBLE_US);

+#ifdef CONFIG_MX7ULP + if (readl(&regs->out_status) & (BM_OUT_STATUS_PROGFAIL | BM_OUT_STATUS_LOCKED)) { + writel((BM_OUT_STATUS_PROGFAIL | BM_OUT_STATUS_LOCKED), &regs->out_status_clr); + printf("mxc_ocotp %s(): fuse write is failed\n", __func__); + return -EIO; + } +#endif + return finish_access(regs, __func__); }

@@ -374,5 +416,13 @@ int fuse_override(u32 bank, u32 word, u32 val)

writel(val, &regs->bank[phy_bank].fuse_regs[phy_word << 2]);

+#ifdef CONFIG_MX7ULP + if (readl(&regs->out_status) & (BM_OUT_STATUS_PROGFAIL | BM_OUT_STATUS_LOCKED)) { + writel((BM_OUT_STATUS_PROGFAIL | BM_OUT_STATUS_LOCKED), &regs->out_status_clr); + printf("mxc_ocotp %s(): fuse write is failed\n", __func__); + return -EIO; + } +#endif + return finish_access(regs, __func__); }