ENGR00315894-54 iMX6SX/SL: Modify SOC to support two ENET

iMX6SX has different enet system clocks with iMX6SL, and has two ENET
controllers. So update clocks and soc APIs accordingly to support this
features.

1. Modify the clock API "enable_enet_clock" to enable enet system clock
   for enet controllers.
2. Enet RGMII TX clock source may come from external or internal PLL.
   By default, use the external phy CLK_25M output as TX clock source.
   When using internal PLL as source, the function enable_fec_anatop_clock
   must be called to enable clock for each enet controller.
3. Modify the MAC address function "imx_get_mac_from_fuse" to get either
   ENET MAC address.
4. Add configuration "CONFIG_FEC_MXC_25M_REF_CLK" to enable ENET 25Mhz
   reference clock.
5. Modify imx6slevk BSP to fit the new APIs.

Signed-off-by: Fugang Duan  <B38611@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>

6 files changed, 97 insertions, 6 deletions

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index e3ca4f6..effe457 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -362,10 +362,34 @@ void enable_qspi_clk(int qspi_num)
 
 	}
 }
+
+void enable_enet_clock(void)
+{
+	u32 reg = 0;
+
+	/* set enet ahb clock 200Mhz
+	 * pll2_pfd2_396m-> ENET_PODF-> ENET_AHB
+	 */
+	reg = __raw_readl(&imx_ccm->chsccdr);
+	reg &= ~(MXC_CCM_CHSCCDR_ENET_PRE_CLK_SEL_MASK
+		| MXC_CCM_CHSCCDR_ENET_PODF_MASK | MXC_CCM_CHSCCDR_ENET_CLK_SEL_MASK);
+	/* PLL2 PFD2 */
+	reg |= (4 << MXC_CCM_CHSCCDR_ENET_PRE_CLK_SEL_OFFSET);
+	/* Div = 2*/
+	reg |= (1 << MXC_CCM_CHSCCDR_ENET_PODF_OFFSET);
+	reg |= (0 << MXC_CCM_CHSCCDR_ENET_CLK_SEL_OFFSET);
+	writel(reg, &imx_ccm->chsccdr);
+
+	/* Enable enet system clock */
+	reg = readl(&imx_ccm->CCGR3);
+	reg |= MXC_CCM_CCGR3_ENET_MASK;
+	writel(reg, &imx_ccm->CCGR3);
+}
+
 #endif
 
 #ifdef CONFIG_FEC_MXC
-int enable_fec_anatop_clock(enum enet_freq freq)
+int enable_fec_anatop_clock(int fec_id, enum enet_freq freq)
 {
 	u32 reg = 0;
 	s32 timeout = 100000;
@@ -378,7 +402,14 @@ int enable_fec_anatop_clock(enum enet_freq freq)
 
 	reg = readl(&anatop->pll_enet);
 	reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
-	reg |= freq;
+
+	if (0 == fec_id) {
+		reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
+		reg |= BF_ANADIG_PLL_ENET_DIV_SELECT(freq);
+	} else {
+		reg &= ~BM_ANADIG_PLL_ENET2_DIV_SELECT;
+		reg |= BF_ANADIG_PLL_ENET2_DIV_SELECT(freq);
+	}
 
 	if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
 	    (!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
@@ -393,8 +424,14 @@ int enable_fec_anatop_clock(enum enet_freq freq)
 	}
 
 	/* Enable FEC clock */
-	reg |= BM_ANADIG_PLL_ENET_ENABLE;
+	if (0 == fec_id)
+		reg |= BM_ANADIG_PLL_ENET_ENABLE;
+	else
+		reg |= BM_ANADIG_PLL_ENET2_ENABLE;
 	reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
+#ifdef CONFIG_FEC_MXC_25M_REF_CLK
+	reg |= BM_ANADIG_PLL_ENET_REF_25M_ENABLE;
+#endif
 	writel(reg, &anatop->pll_enet);
 
 	return 0;
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index 88cb2bb..b31ad04 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -480,6 +480,29 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 	struct fuse_bank4_regs *fuse =
 			(struct fuse_bank4_regs *)bank->fuse_regs;
 
+#ifdef CONFIG_MX6SX
+	if (0 == dev_id) {
+		u32 value = readl(&fuse->mac_addr1);
+		mac[0] = (value >> 8);
+		mac[1] = value ;
+
+		value = readl(&fuse->mac_addr0);
+		mac[2] = value >> 24 ;
+		mac[3] = value >> 16 ;
+		mac[4] = value >> 8 ;
+		mac[5] = value ;
+	} else {
+		u32 value = readl(&fuse->mac_addr2);
+		mac[0] = value >> 24 ;
+		mac[1] = value >> 16 ;
+		mac[2] = value >> 8 ;
+		mac[3] = value ;
+
+		value = readl(&fuse->mac_addr1);
+		mac[4] = value >> 24 ;
+		mac[5] = value >> 16 ;
+	}
+#else
 	u32 value = readl(&fuse->mac_addr_high);
 	mac[0] = (value >> 8);
 	mac[1] = value ;
@@ -489,7 +512,7 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 	mac[3] = value >> 16 ;
 	mac[4] = value >> 8 ;
 	mac[5] = value ;
-
+#endif
 }
 #endif
 
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 3bfbc9c..cf21fb9 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -58,12 +58,15 @@ int enable_sata_clock(void);
 int enable_pcie_clock(void);
 int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
 void enable_ipu_clock(void);
-int enable_fec_anatop_clock(enum enet_freq freq);
+#ifdef CONFIG_FEC_MXC
+int enable_fec_anatop_clock(int fec_id, enum enet_freq freq);
+#endif
 #ifdef CONFIG_SECURE_BOOT
 void hab_caam_clock_enable(void);
 void hab_caam_clock_disable(void);
 #endif
 #if (defined(CONFIG_MX6SX))
 void enable_qspi_clk(int qspi_num);
+void enable_enet_clock(void);
 #endif
 #endif /* __ASM_ARCH_CLOCK_H */
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h
index 39df1fd..30b750e 100644
--- a/arch/arm/include/asm/arch-mx6/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx6/imx-regs.h
@@ -591,6 +591,22 @@ struct fuse_bank1_regs {
 	u32     ana2;
 };
 
+#ifdef CONFIG_MX6SX
+struct fuse_bank4_regs {
+	u32 sjc_resp_low;
+	u32 rsvd0[3];
+	u32 sjc_resp_high;
+	u32 rsvd1[3];
+	u32 mac_addr0;
+	u32 rsvd2[3];
+	u32 mac_addr1;
+	u32 rsvd3[3];
+	u32 mac_addr2;
+	u32 rsvd4[7];
+	u32 gp1;
+	u32 rsvd5[7];
+};
+#else
 struct fuse_bank4_regs {
 	u32	sjc_resp_low;
 	u32     rsvd0[3];
@@ -605,6 +621,7 @@ struct fuse_bank4_regs {
 	u32	gp2;
 	u32	rsvd5[3];
 };
+#endif
 
 struct aipstz_regs {
 	u32	mprot0;
diff --git a/arch/arm/include/asm/arch-mx6/iomux.h b/arch/arm/include/asm/arch-mx6/iomux.h
index f9ee0d9..c3003c1 100644
--- a/arch/arm/include/asm/arch-mx6/iomux.h
+++ b/arch/arm/include/asm/arch-mx6/iomux.h
@@ -65,6 +65,16 @@
 #define IOMUX_GPR1_FEC_MASK    (IOMUX_GPR1_FEC_CLOCK_MUX1_SEL_MASK \
 				| IOMUX_GPR1_FEC_CLOCK_MUX2_SEL_MASK)
 
+#define IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK (0x1 << 17)
+#define IOMUX_GPR1_FEC1_CLOCK_MUX2_SEL_MASK (0x1 << 13)
+#define IOMUX_GPR1_FEC1_MASK	(IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK \
+				| IOMUX_GPR1_FEC1_CLOCK_MUX2_SEL_MASK)
+
+#define IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK (0x1 << 18)
+#define IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK (0x1 << 14)
+#define IOMUX_GPR1_FEC2_MASK	(IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK \
+				| IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK)
+
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_0P5DB	(0<<24)
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_1P0DB	(1<<24)
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_1P5DB	(2<<24)
@@ -157,4 +167,5 @@
 				|IOMUXC_GPR13_SATA_PHY_3_MASK \
 				|IOMUXC_GPR13_SATA_PHY_2_MASK \
 				|IOMUXC_GPR13_SATA_PHY_1_MASK)
+
 #endif	/* __ASM_ARCH_IOMUX_H__ */
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index d4486ed..1667ada 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -608,7 +608,7 @@ static int setup_fec(void)
 	/* clear gpr1[14], gpr1[18:17] to select anatop clock */
 	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC_MASK, 0);
 
-	ret = enable_fec_anatop_clock(ENET_50MHz);
+	ret = enable_fec_anatop_clock(0, ENET_50MHz);
 	if (ret)
 		return ret;