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

[Peng Fan]

From: Ye Li <ye...@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....@nxp.com>
Signed-off-by: Ye Li <ye...@nxp.com>
Cc: Stefano Babic <sba...@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__);
 }
-- 
2.6.2

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