167 lines
3.6 KiB
Diff
167 lines
3.6 KiB
Diff
--- a/arch/mips/ath79/dev-wmac.c
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+++ b/arch/mips/ath79/dev-wmac.c
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@@ -165,6 +165,137 @@ static void qca955x_wmac_setup(void)
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ath79_wmac_data.is_clk_25mhz = true;
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}
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+static bool __init
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+ar93xx_wmac_otp_read_word(void __iomem *base, int addr, u32 *data)
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+{
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+ int timeout = 1000;
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+ u32 val;
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+
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+ __raw_readl(base + AR9300_OTP_BASE + (4 * addr));
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+ while (timeout--) {
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+ val = __raw_readl(base + AR9300_OTP_STATUS);
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+ if ((val & AR9300_OTP_STATUS_TYPE) == AR9300_OTP_STATUS_VALID)
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+ break;
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+
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+ udelay(10);
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+ }
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+
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+ if (!timeout)
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+ return false;
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+
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+ *data = __raw_readl(base + AR9300_OTP_READ_DATA);
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+ return true;
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+}
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+
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+static bool __init
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+ar93xx_wmac_otp_read(void __iomem *base, int addr, u8 *dest, int len)
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+{
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+ u32 data;
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+ int i;
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+
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+ for (i = 0; i < len; i++) {
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+ int offset = 8 * ((addr - i) % 4);
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+
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+ if (!ar93xx_wmac_otp_read_word(base, (addr - i) / 4, &data))
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+ return false;
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+
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+ dest[i] = (data >> offset) & 0xff;
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+ }
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+
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+ return true;
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+}
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+
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+static bool __init
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+ar93xx_wmac_otp_uncompress(void __iomem *base, int addr, int len, u8 *dest,
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+ int dest_start, int dest_len)
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+{
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+ int dest_bytes = 0;
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+ int offset = 0;
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+ int end = addr - len;
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+ u8 hdr[2];
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+
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+ while (addr > end) {
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+ if (!ar93xx_wmac_otp_read(base, addr, hdr, 2))
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+ return false;
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+
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+ addr -= 2;
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+ offset += hdr[0];
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+
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+ if (offset <= dest_start + dest_len &&
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+ offset + len >= dest_start) {
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+ int data_offset = 0;
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+ int dest_offset = 0;
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+ int copy_len;
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+
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+ if (offset < dest_start)
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+ data_offset = dest_start - offset;
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+ else
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+ dest_offset = offset - dest_start;
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+
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+ copy_len = len - data_offset;
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+ if (copy_len > dest_len - dest_offset)
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+ copy_len = dest_len - dest_offset;
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+
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+ ar93xx_wmac_otp_read(base, addr - data_offset,
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+ dest + dest_offset,
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+ copy_len);
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+
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+ dest_bytes += copy_len;
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+ }
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+ addr -= hdr[1];
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+ }
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+ return !!dest_bytes;
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+}
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+
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+bool __init ar93xx_wmac_read_mac_address(u8 *dest)
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+{
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+ void __iomem *base;
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+ bool ret = false;
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+ int addr = 0x1ff;
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+ unsigned int len;
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+ u32 hdr_u32;
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+ u8 *hdr = (u8 *) &hdr_u32;
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+ u8 mac[6] = { 0x00, 0x02, 0x03, 0x04, 0x05, 0x06 };
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+ int mac_start = 2, mac_end = 8;
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+
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+ BUG_ON(!soc_is_ar933x() && !soc_is_ar934x());
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+ base = ioremap_nocache(AR933X_WMAC_BASE, AR933X_WMAC_SIZE);
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+ while (addr > sizeof(hdr)) {
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+ if (!ar93xx_wmac_otp_read(base, addr, hdr, sizeof(hdr)))
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+ break;
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+
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+ if (hdr_u32 == 0 || hdr_u32 == ~0)
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+ break;
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+
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+ len = (hdr[1] << 4) | (hdr[2] >> 4);
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+ addr -= 4;
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+
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+ switch (hdr[0] >> 5) {
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+ case 0:
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+ if (len < mac_end)
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+ break;
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+
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+ ar93xx_wmac_otp_read(base, addr - mac_start, mac, 6);
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+ ret = true;
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+ break;
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+ case 3:
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+ ret |= ar93xx_wmac_otp_uncompress(base, addr, len, mac,
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+ mac_start, 6);
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+ break;
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+ default:
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+ break;
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+ }
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+
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+ addr -= len + 2;
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+ }
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+
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+ iounmap(base);
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+ if (ret)
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+ memcpy(dest, mac, 6);
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+
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+ return ret;
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+}
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+
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void __init ath79_register_wmac(u8 *cal_data, u8 *mac_addr)
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{
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if (soc_is_ar913x())
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--- a/arch/mips/ath79/dev-wmac.h
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+++ b/arch/mips/ath79/dev-wmac.h
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@@ -14,5 +14,6 @@
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void ath79_register_wmac(u8 *cal_data, u8 *mac_addr);
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void ath79_register_wmac_simple(void);
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+bool ar93xx_wmac_read_mac_address(u8 *dest);
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#endif /* _ATH79_DEV_WMAC_H */
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--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
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+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
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@@ -112,6 +112,14 @@
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#define QCA955X_EHCI1_BASE 0x1b400000
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#define QCA955X_EHCI_SIZE 0x1000
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+#define AR9300_OTP_BASE 0x14000
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+#define AR9300_OTP_STATUS 0x15f18
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+#define AR9300_OTP_STATUS_TYPE 0x7
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+#define AR9300_OTP_STATUS_VALID 0x4
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+#define AR9300_OTP_STATUS_ACCESS_BUSY 0x2
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+#define AR9300_OTP_STATUS_SM_BUSY 0x1
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+#define AR9300_OTP_READ_DATA 0x15f1c
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+
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/*
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* DDR_CTRL block
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*/
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