ar71xx: Add OTP support for AR934x

The patch 523-MIPS-ath79-OTP-support only supports the OTP offsets for
AR933x chips, which has changed on newer platforms such as the AR934x.
The follwoing change is to add support for reading the OTP on the
AR934x. Tested on an Aerohive AP-121.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Chris Blake <chrisrblake93@gmail.com>

diff --git a/target/linux/ar71xx/patches-4.4/641-MIPS-ath79-fix-AR934x-OTP-offsets.patch b/target/linux/ar71xx/patches-4.4/641-MIPS-ath79-fix-AR934x-OTP-offsets.patch
new file mode 100644 (file)
index 0000000..78ecf89
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/641-MIPS-ath79-fix-AR934x-OTP-offsets.patch
@@ -0,0 +1,66 @@
+--- a/arch/mips/ath79/dev-wmac.c       2017-02-12 19:49:21.158142253 +0100
++++ b/arch/mips/ath79/dev-wmac.c       2017-02-12 21:01:51.206198122 +0100
+@@ -232,15 +274,27 @@ static void qca956x_wmac_setup(void)
+       ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision;
+ }
+
++#define AR93XX_WMAC_SIZE \
++      (soc_is_ar934x() ? AR934X_WMAC_SIZE : AR933X_WMAC_SIZE)
++#define AR93XX_WMAC_BASE \
++      (soc_is_ar934x() ? AR934X_WMAC_BASE : AR933X_WMAC_BASE)
++
++#define AR93XX_OTP_BASE \
++      (soc_is_ar934x() ? AR934X_OTP_BASE : AR9300_OTP_BASE)
++#define AR93XX_OTP_STATUS \
++      (soc_is_ar934x() ? AR934X_OTP_STATUS : AR9300_OTP_STATUS)
++#define AR93XX_OTP_READ_DATA \
++      (soc_is_ar934x() ? AR934X_OTP_READ_DATA : AR9300_OTP_READ_DATA)
++
+ static bool __init
+ ar93xx_wmac_otp_read_word(void __iomem *base, int addr, u32 *data)
+ {
+       int timeout = 1000;
+       u32 val;
+
+-      __raw_readl(base + AR9300_OTP_BASE + (4 * addr));
++      __raw_readl(base + AR93XX_OTP_BASE + (4 * addr));
+       while (timeout--) {
+-              val = __raw_readl(base + AR9300_OTP_STATUS);
++              val = __raw_readl(base + AR93XX_OTP_STATUS);
+               if ((val & AR9300_OTP_STATUS_TYPE) == AR9300_OTP_STATUS_VALID)
+                       break;
+
+@@ -250,7 +304,7 @@ ar93xx_wmac_otp_read_word(void __iomem *
+       if (!timeout)
+               return false;
+
+-      *data = __raw_readl(base + AR9300_OTP_READ_DATA);
++      *data = __raw_readl(base + AR93XX_OTP_READ_DATA);
+       return true;
+ }
+
+@@ -326,7 +380,7 @@ bool __init ar93xx_wmac_read_mac_address
+       int mac_start = 2, mac_end = 8;
+
+       BUG_ON(!soc_is_ar933x() && !soc_is_ar934x());
+-      base = ioremap_nocache(AR933X_WMAC_BASE, AR933X_WMAC_SIZE);
++      base = ioremap_nocache(AR93XX_WMAC_BASE, AR93XX_WMAC_SIZE);
+       while (addr > sizeof(hdr)) {
+               if (!ar93xx_wmac_otp_read(base, addr, hdr, sizeof(hdr)))
+                       break;
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h   2017-02-12 20:22:32.185209249 +0100
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h   2017-02-12 20:42:21.037382287 +0100
+@@ -172,6 +172,13 @@
+ #define AR9300_OTP_STATUS_SM_BUSY     0x1
+ #define AR9300_OTP_READ_DATA  0x15f1c
+
++#define AR934X_OTP_BASE                                       0x30000
++#define AR934X_OTP_STATUS                             0x31018
++#define AR934X_OTP_READ_DATA                          0x3101c
++#define AR934X_OTP_INTF2_ADDRESS                      0x31008
++#define AR934X_OTP_INTF3_ADDRESS                      0x3100c
++#define AR934X_OTP_PGENB_SETUP_HOLD_TIME_ADDRESS      0x31034
++
+ /*
+  * Hidden Registers
+  */