[U-Boot] [U-Boot, 1/3] rockchip: evb-rk3399: add ethaddr and serial# init

[Philipp Tomsich]

Kever,

On Thu, 27 Jul 2017, Kever Yang wrote:

> Sync the code from puma-rk3399:
> 8adc9d1 rockchip: board: puma_rk3399: derive ethaddr from cpuid
> 9415b9a rockchip: board: puma_rk3399: add support for serial# and cpuid#
> via efuses

I am not keen on duplicating this code all over the place.
Can we factor this out and call a common module from all RK3399 boards
that want to use this?

>
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
>
> board/rockchip/evb_rk3399/evb-rk3399.c | 123 ++++++++++++++++++++++++++++++++-
> 1 file changed, 121 insertions(+), 2 deletions(-)
>
> diff --git a/board/rockchip/evb_rk3399/evb-rk3399.c b/board/rockchip/evb_rk3399/evb-rk3399.c
> index d50c59d..40fc1a5 100644
> --- a/board/rockchip/evb_rk3399/evb-rk3399.c
> +++ b/board/rockchip/evb_rk3399/evb-rk3399.c
> @@ -5,23 +5,29 @@
>  */
> #include <common.h>
> #include <dm.h>
> +#include <misc.h>
> #include <ram.h>
> #include <dm/pinctrl.h>
> #include <dm/uclass-internal.h>
> +#include <asm/setup.h>
> #include <asm/arch/periph.h>
> #include <power/regulator.h>
> +#include <u-boot/sha256.h>
>
> DECLARE_GLOBAL_DATA_PTR;
>
> +#define RK3399_CPUID_OFF  0x7
> +#define RK3399_CPUID_LEN  0x10
> +
> int board_init(void)
> {
> 	struct udevice *pinctrl, *regulator;
> 	int ret;
>
> 	/*
> -	 * The PWM do not have decicated interrupt number in dts and can
> +	 * The PWM does not have decicated interrupt number in dts and can
> 	 * not get periph_id by pinctrl framework, so let's init them here.
> -	 * The PWM2 and PWM3 are for pwm regulater.
> +	 * The PWM2 and PWM3 are for pwm regulators.
> 	 */
> 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
> 	if (ret) {
> @@ -67,3 +73,116 @@ int board_init(void)
> out:
> 	return 0;
> }
> +
> +static void setup_macaddr(void)
> +{
> +#if CONFIG_IS_ENABLED(CMD_NET)
> +	int ret;
> +	const char *cpuid = getenv("cpuid#");
> +	u8 hash[SHA256_SUM_LEN];
> +	int size = sizeof(hash);
> +	u8 mac_addr[6];
> +
> +	/* Only generate a MAC address, if none is set in the environment */
> +	if (getenv("ethaddr"))
> +		return;
> +
> +	if (!cpuid) {
> +		debug("%s: could not retrieve 'cpuid#'\n", __func__);
> +		return;
> +	}
> +
> +	ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
> +	if (ret) {
> +		debug("%s: failed to calculate SHA256\n", __func__);
> +		return;
> +	}
> +
> +	/* Copy 6 bytes of the hash to base the MAC address on */
> +	memcpy(mac_addr, hash, 6);
> +
> +	/* Make this a valid MAC address and set it */
> +	mac_addr[0] &= 0xfe;  /* clear multicast bit */
> +	mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
> +	eth_setenv_enetaddr("ethaddr", mac_addr);
> +#endif
> +
> +	return;
> +}
> +
> +static void setup_serial(void)
> +{
> +#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
> +	struct udevice *dev;
> +	int ret, i;
> +	u8 cpuid[RK3399_CPUID_LEN];
> +	u8 low[RK3399_CPUID_LEN/2], high[RK3399_CPUID_LEN/2];
> +	char cpuid_str[RK3399_CPUID_LEN * 2 + 1];
> +	u64 serialno;
> +	char serialno_str[16];
> +
> +	/* retrieve the device */
> +	ret = uclass_get_device_by_driver(UCLASS_MISC,
> +					  DM_GET_DRIVER(rockchip_efuse), &dev);
> +	if (ret) {
> +		debug("%s: could not find efuse device\n", __func__);
> +		return;
> +	}
> +
> +	/* read the cpu_id range from the efuses */
> +	ret = misc_read(dev, RK3399_CPUID_OFF, &cpuid, sizeof(cpuid));
> +	if (ret) {
> +		debug("%s: reading cpuid from the efuses failed\n",
> +		      __func__);
> +		return;
> +	}
> +
> +	memset(cpuid_str, 0, sizeof(cpuid_str));
> +	for (i = 0; i < 16; i++)
> +		sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
> +
> +	debug("cpuid: %s\n", cpuid_str);
> +
> +	/*
> +	 * Mix the cpuid bytes using the same rules as in
> +	 *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
> +	 */
> +	for (i = 0; i < 8; i++) {
> +		low[i] = cpuid[1 + (i << 1)];
> +		high[i] = cpuid[i << 1];
> +	}
> +
> +	serialno = crc32_no_comp(0, low, 8);
> +	serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
> +	snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
> +
> +	setenv("cpuid#", cpuid_str);
> +	setenv("serial#", serialno_str);
> +#endif
> +
> +	return;
> +}
> +
> +int misc_init_r(void)
> +{
> +	setup_serial();
> +	setup_macaddr();
> +
> +	return 0;
> +}
> +
> +#ifdef CONFIG_SERIAL_TAG
> +void get_board_serial(struct tag_serialnr *serialnr)
> +{
> +	char *serial_string;
> +	u64 serial = 0;
> +
> +	serial_string = getenv("serial#");
> +
> +	if (serial_string)
> +		serial = simple_strtoull(serial_string, NULL, 16);
> +
> +	serialnr->high = (u32)(serial >> 32);
> +	serialnr->low = (u32)(serial & 0xffffffff);
> +}
> +#endif
>