Re: [U-Boot] [PATCH v9 7/9] riscv: sifive: fu540: Setup ethaddr env variable using OTP
From: Anup Patel [mailto:Anup.Patel@wdc.com] Sent: Tuesday, June 25, 2019 2:32 PM To: Rick Jian-Zhi Chen(陳建志); Bin Meng; Lukas Auer; Simon Glass Cc: Ramon Fried; Joe Hershberger; Palmer Dabbelt; Paul Walmsley; Troy Benjegerdes; Atish Patra; Alistair Francis; U-Boot Mailing List; Anup Patel Subject: [PATCH v9 7/9] riscv: sifive: fu540: Setup ethaddr env variable using OTP
This patch extends SiFive FU540 board support to setup ethaddr env variable based on board serialnum read from OTP.
Signed-off-by: Anup Patel anup.patel@wdc.com Reviewed-by: Bin Meng bmeng.cn@gmail.com
board/sifive/fu540/fu540.c | 122 +++++++++++++++++++++++++++++++++ configs/sifive_fu540_defconfig | 1 + 2 files changed, 123 insertions(+)
diff --git a/board/sifive/fu540/fu540.c b/board/sifive/fu540/fu540.c index 5adc4a3d4a..11daf1a75a 100644 --- a/board/sifive/fu540/fu540.c +++ b/board/sifive/fu540/fu540.c @@ -8,6 +8,128 @@
#include <common.h> #include <dm.h> +#include <linux/delay.h> +#include <linux/io.h>
+#ifdef CONFIG_MISC_INIT_R
+#define FU540_OTP_BASE_ADDR 0x10070000
+struct fu540_otp_regs {
u32 pa; /* Address input */u32 paio; /* Program address input */u32 pas; /* Program redundancy cell selection input */u32 pce; /* OTP Macro enable input */u32 pclk; /* Clock input */u32 pdin; /* Write data input */u32 pdout; /* Read data output */u32 pdstb; /* Deep standby mode enable input (active low) */u32 pprog; /* Program mode enable input */u32 ptc; /* Test column enable input */u32 ptm; /* Test mode enable input */u32 ptm_rep;/* Repair function test mode enable input */u32 ptr; /* Test row enable input */u32 ptrim; /* Repair function enable input */u32 pwe; /* Write enable input (defines program cycle) */+} __packed;
+#define BYTES_PER_FUSE 4 +#define NUM_FUSES 0x1000
+static int fu540_otp_read(int offset, void *buf, int size) {
struct fu540_otp_regs *regs = (void __iomem *)FU540_OTP_BASE_ADDR;unsigned int i;int fuseidx = offset / BYTES_PER_FUSE;int fusecount = size / BYTES_PER_FUSE;u32 fusebuf[fusecount];/* check bounds */if (offset < 0 || size < 0)return -EINVAL;if (fuseidx >= NUM_FUSES)return -EINVAL;if ((fuseidx + fusecount) > NUM_FUSES)return -EINVAL;/* init OTP */writel(0x01, ®s->pdstb); /* wake up from stand-by */writel(0x01, ®s->ptrim); /* enable repair function */writel(0x01, ®s->pce); /* enable input *//* read all requested fuses */for (i = 0; i < fusecount; i++, fuseidx++) {writel(fuseidx, ®s->pa);/* cycle clock to read */writel(0x01, ®s->pclk);mdelay(1);writel(0x00, ®s->pclk);mdelay(1);/* read the value */fusebuf[i] = readl(®s->pdout);}/* shut down */writel(0, ®s->pce);writel(0, ®s->ptrim);writel(0, ®s->pdstb);/* copy out */memcpy(buf, fusebuf, size);return 0;+}
+static u32 fu540_read_serialnum(void) +{
int ret;u32 serial[2] = {0};for (int i = 0xfe * 4; i > 0; i -= 8) {ret = fu540_otp_read(i, serial, sizeof(serial));if (ret) {printf("%s: error reading from OTP\n", __func__);break;}if (serial[0] == ~serial[1])return serial[0];}return 0;+}
+static void fu540_setup_macaddr(u32 serialnum) {
/* Default MAC address */unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 };/** We derive our board MAC address by ORing last three bytes* of board serial number to above default MAC address.** This logic of deriving board MAC address is taken from* SiFive FSBL and is kept unchanged.*/mac[5] |= (serialnum >> 0) & 0xff;mac[4] |= (serialnum >> 8) & 0xff;mac[3] |= (serialnum >> 16) & 0xff;/* Update environment variable */eth_env_set_enetaddr("ethaddr", mac);+}
+int misc_init_r(void) +{
/* Set ethaddr environment variable if not set */if (!env_get("ethaddr"))fu540_setup_macaddr(fu540_read_serialnum());return 0;+}
+#endif
int board_init(void) { diff --git a/configs/sifive_fu540_defconfig b/configs/sifive_fu540_defconfig index f78412398e..f19203745e 100644 --- a/configs/sifive_fu540_defconfig +++ b/configs/sifive_fu540_defconfig @@ -7,4 +7,5 @@ CONFIG_DISTRO_DEFAULTS=y CONFIG_FIT=y CONFIG_DISPLAY_CPUINFO=y CONFIG_DISPLAY_BOARDINFO=y +CONFIG_MISC_INIT_R=y CONFIG_OF_PRIOR_STAGE=y
Applied to u-boot-riscv/master, thanks!
Rick
participants (1)
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Rick Chen