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mxc_ocotp: Update driver to support OCOTP controller on i.MX7ULP 

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.

Add is_mx7ulp macro in sys_proto.h

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by : Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2017-02-22 16:21:46 +08:00 committed by Stefano Babic
parent d665eb6114
commit 3ca0f0d2da
2 changed files with 53 additions and 1 deletions
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2
arch/arm/include/asm/imx-common/sys_proto.h
View File

@ -38,6 +38,8 @@
#define is_mx6ull() (is_cpu_type(MXC_CPU_MX6ULL))
#define is_mx6sll() (is_cpu_type(MXC_CPU_MX6SLL))
#define is_mx7ulp() (is_cpu_type(MXC_CPU_MX7ULP))
u32 get_nr_cpus(void);
u32 get_cpu_rev(void);
u32 get_cpu_speed_grade_hz(void);

52
drivers/misc/mxc_ocotp.c
View File

@ -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
@ -98,7 +107,7 @@ u32 fuse_bank_physical(int index)
{
u32 phy_index;
if (is_mx6sl()) {
if (is_mx6sl() || is_mx7ulp()) {
phy_index = index;
} else if (is_mx6ul() || is_mx6ull() || is_mx6sll()) {
if ((is_mx6ull() || is_mx6sll()) && index == 8)
@ -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__);
}