diff options
Diffstat (limited to 'drivers/misc/mxc_ocotp.c')
| -rw-r--r-- | drivers/misc/mxc_ocotp.c | 152 |
1 files changed, 146 insertions, 6 deletions
diff --git a/drivers/misc/mxc_ocotp.c b/drivers/misc/mxc_ocotp.c index d92044e..65ff815 100644 --- a/drivers/misc/mxc_ocotp.c +++ b/drivers/misc/mxc_ocotp.c @@ -25,8 +25,21 @@ #define BM_CTRL_ERROR 0x00000200 #define BM_CTRL_BUSY 0x00000100 #define BO_CTRL_ADDR 0 +#ifdef CONFIG_MX7 +#define BM_CTRL_ADDR 0x0000000f +#define BM_CTRL_RELOAD 0x00000400 +#else #define BM_CTRL_ADDR 0x0000007f - +#endif + +#ifdef CONFIG_MX7 +#define BO_TIMING_FSOURCE 12 +#define BM_TIMING_FSOURCE 0x0007f000 +#define BV_TIMING_FSOURCE_NS 1001 +#define BO_TIMING_PROG 0 +#define BM_TIMING_PROG 0x00000fff +#define BV_TIMING_PROG_US 10 +#else #define BO_TIMING_STROBE_READ 16 #define BM_TIMING_STROBE_READ 0x003f0000 #define BV_TIMING_STROBE_READ_NS 37 @@ -36,6 +49,7 @@ #define BO_TIMING_STROBE_PROG 0 #define BM_TIMING_STROBE_PROG 0x00000fff #define BV_TIMING_STROBE_PROG_US 10 +#endif #define BM_READ_CTRL_READ_FUSE 0x00000001 @@ -43,6 +57,68 @@ #define WRITE_POSTAMBLE_US 2 +#if defined(CONFIG_MX6) || defined(CONFIG_VF610) +#define FUSE_BANK_SIZE 0x80 +#ifdef CONFIG_MX6SL +#define FUSE_BANKS 8 +#else +#define FUSE_BANKS 16 +#endif +#elif defined CONFIG_MX7 +#define FUSE_BANK_SIZE 0x40 +#define FUSE_BANKS 16 +#else +#error "Unsupported architecture\n" +#endif + +#if defined(CONFIG_MX6) +#include <asm/arch/sys_proto.h> + +/* + * There is a hole in shadow registers address map of size 0x100 + * between bank 5 and bank 6 on iMX6QP, iMX6DQ, iMX6SDL, iMX6SX and iMX6UL. + * Bank 5 ends at 0x6F0 and Bank 6 starts at 0x800. When reading the fuses, + * we should account for this hole in address space. + * + * Similar hole exists between bank 14 and bank 15 of size + * 0x80 on iMX6QP, iMX6DQ, iMX6SDL and iMX6SX. + * Note: iMX6SL has only 0-7 banks and there is no hole. + * Note: iMX6UL doesn't have this one. + * + * This function is to covert user input to physical bank index. + * Only needed when read fuse, because we use register offset, so + * need to calculate real register offset. + * When write, no need to consider hole, always use the bank/word + * index from fuse map. + */ +u32 fuse_bank_physical(int index) +{ + u32 phy_index; + + if (is_cpu_type(MXC_CPU_MX6SL)) { + phy_index = index; + } else if (is_cpu_type(MXC_CPU_MX6UL)) { + if (index >= 6) + phy_index = fuse_bank_physical(5) + (index - 6) + 3; + else + phy_index = index; + } else { + if (index >= 15) + phy_index = fuse_bank_physical(14) + (index - 15) + 2; + else if (index >= 6) + phy_index = fuse_bank_physical(5) + (index - 6) + 3; + else + phy_index = index; + } + return phy_index; +} +#else +u32 fuse_bank_physical(int index) +{ + return index; +} +#endif + static void wait_busy(struct ocotp_regs *regs, unsigned int delay_us) { while (readl(®s->ctrl) & BM_CTRL_BUSY) @@ -59,9 +135,9 @@ static int prepare_access(struct ocotp_regs **regs, u32 bank, u32 word, { *regs = (struct ocotp_regs *)OCOTP_BASE_ADDR; - if (bank >= ARRAY_SIZE((*regs)->bank) || - word >= ARRAY_SIZE((*regs)->bank[0].fuse_regs) >> 2 || - !assert) { + if (bank >= FUSE_BANKS || + word >= ARRAY_SIZE((*regs)->bank[0].fuse_regs) >> 2 || + !assert) { printf("mxc_ocotp %s(): Invalid argument\n", caller); return -EINVAL; } @@ -99,16 +175,38 @@ int fuse_read(u32 bank, u32 word, u32 *val) { struct ocotp_regs *regs; int ret; + u32 phy_bank; ret = prepare_read(®s, bank, word, val, __func__); if (ret) return ret; - *val = readl(®s->bank[bank].fuse_regs[word << 2]); + phy_bank = fuse_bank_physical(bank); + + *val = readl(®s->bank[phy_bank].fuse_regs[word << 2]); return finish_access(regs, __func__); } +#ifdef CONFIG_MX7 +static void set_timing(struct ocotp_regs *regs) +{ + u32 ipg_clk; + u32 fsource, prog; + u32 timing; + + ipg_clk = mxc_get_clock(MXC_IPG_CLK); + + fsource = DIV_ROUND_UP((ipg_clk / 1000) * BV_TIMING_FSOURCE_NS, + + 1000000) + 1; + prog = DIV_ROUND_CLOSEST(ipg_clk * BV_TIMING_PROG_US, 1000000) + 1; + + timing = BF(fsource, TIMING_FSOURCE) | BF(prog, TIMING_PROG); + + clrsetbits_le32(®s->timing, BM_TIMING_FSOURCE | BM_TIMING_PROG, + timing); +} +#else static void set_timing(struct ocotp_regs *regs) { u32 ipg_clk; @@ -130,12 +228,17 @@ static void set_timing(struct ocotp_regs *regs) clrsetbits_le32(®s->timing, BM_TIMING_STROBE_READ | BM_TIMING_RELAX | BM_TIMING_STROBE_PROG, timing); } +#endif static void setup_direct_access(struct ocotp_regs *regs, u32 bank, u32 word, int write) { u32 wr_unlock = write ? BV_CTRL_WR_UNLOCK_KEY : 0; +#ifdef CONFIG_MX7 + u32 addr = bank; +#else u32 addr = bank << 3 | word; +#endif set_timing(regs); clrsetbits_le32(®s->ctrl, BM_CTRL_WR_UNLOCK | BM_CTRL_ADDR, @@ -155,7 +258,11 @@ int fuse_sense(u32 bank, u32 word, u32 *val) setup_direct_access(regs, bank, word, false); writel(BM_READ_CTRL_READ_FUSE, ®s->read_ctrl); wait_busy(regs, 1); +#ifdef CONFIG_MX7 + *val = readl((®s->read_fuse_data0) + (word << 2)); +#else *val = readl(®s->read_fuse_data); +#endif return finish_access(regs, __func__); } @@ -176,8 +283,38 @@ int fuse_prog(u32 bank, u32 word, u32 val) return ret; setup_direct_access(regs, bank, word, true); +#ifdef CONFIG_MX7 + switch (word) { + case 0: + writel(0, ®s->data1); + writel(0, ®s->data2); + writel(0, ®s->data3); + writel(val, ®s->data0); + break; + case 1: + writel(val, ®s->data1); + writel(0, ®s->data2); + writel(0, ®s->data3); + writel(0, ®s->data0); + break; + case 2: + writel(0, ®s->data1); + writel(val, ®s->data2); + writel(0, ®s->data3); + writel(0, ®s->data0); + break; + case 3: + writel(0, ®s->data1); + writel(0, ®s->data2); + writel(val, ®s->data3); + writel(0, ®s->data0); + break; + } + wait_busy(regs, BV_TIMING_PROG_US); +#else writel(val, ®s->data); wait_busy(regs, BV_TIMING_STROBE_PROG_US); +#endif udelay(WRITE_POSTAMBLE_US); return finish_access(regs, __func__); @@ -187,12 +324,15 @@ int fuse_override(u32 bank, u32 word, u32 val) { struct ocotp_regs *regs; int ret; + u32 phy_bank; ret = prepare_write(®s, bank, word, __func__); if (ret) return ret; - writel(val, ®s->bank[bank].fuse_regs[word << 2]); + phy_bank = fuse_bank_physical(bank); + + writel(val, ®s->bank[phy_bank].fuse_regs[word << 2]); return finish_access(regs, __func__); } |