sunxi: add gmac Ethernet support

Add support for the GMAC Ethernet controller on Allwinner A20 (sun7i)
processors. Enable for the Cubietruck.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>

arch/arm/cpu/armv7/sunxi/board.c

@@ -11,6 +11,8 @@
  */
 
 #include <common.h>
+#include <netdev.h>
+#include <miiphy.h>
 #include <serial.h>
 #ifdef CONFIG_SPL_BUILD
 #include <spl.h>
@@ -86,3 +88,24 @@ void enable_caches(void)
 	dcache_enable();
 }
 #endif
+
+#ifdef CONFIG_CMD_NET
+/*
+ * Initializes on-chip ethernet controllers.
+ * to override, implement board_eth_init()
+ */
+int cpu_eth_init(bd_t *bis)
+{
+	int rc;
+
+#ifdef CONFIG_SUNXI_GMAC
+	rc = sunxi_gmac_initialize(bis);
+	if (rc < 0) {
+		printf("sunxi: failed to initialize gmac\n");
+		return rc;
+	}
+#endif
+
+	return 0;
+}
+#endif

board/sunxi/Makefile

@@ -9,4 +9,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 obj-y	+= board.o
+obj-$(CONFIG_SUNXI_GMAC)	+= gmac.o
 obj-$(CONFIG_CUBIETRUCK)	+= dram_cubietruck.o

board/sunxi/gmac.c

+#include <common.h>
+#include <netdev.h>
+#include <miiphy.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
+
+int sunxi_gmac_initialize(bd_t *bis)
+{
+	int pin;
+	struct sunxi_ccm_reg *const ccm =
+		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+	/* Set up clock gating */
+	setbits_le32(&ccm->ahb_gate1, 0x1 << AHB_GATE_OFFSET_GMAC);
+
+	/* Set MII clock */
+	setbits_le32(&ccm->gmac_clk_cfg, CCM_GMAC_CTRL_TX_CLK_SRC_INT_RGMII |
+		CCM_GMAC_CTRL_GPIT_RGMII);
+
+	/* Configure pin mux settings for GMAC */
+	for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(16); pin++) {
+		/* skip unused pins in RGMII mode */
+		if (pin == SUNXI_GPA(9) || pin == SUNXI_GPA(14))
+			continue;
+		sunxi_gpio_set_cfgpin(pin, SUN7I_GPA0_GMAC);
+		sunxi_gpio_set_drv(pin, 3);
+	}
+
+	return designware_initialize(SUNXI_GMAC_BASE, PHY_INTERFACE_MODE_RGMII);
+}

boards.cfg

@@ -379,7 +379,7 @@ Active  arm         armv7          rmobile     renesas         lager
 Active  arm         armv7          s5pc1xx     samsung         goni                s5p_goni                              -                                                                                                                                 Przemyslaw Marczak <p.marczak@samsung.com>
 Active  arm         armv7          s5pc1xx     samsung         smdkc100            smdkc100                              -                                                                                                                                 Minkyu Kang <mk7.kang@samsung.com>
 Active  arm         armv7          socfpga     altera          socfpga             socfpga_cyclone5                      -                                                                                                                                 -
-Active  arm         armv7          sunxi       -               sunxi               Cubietruck_FEL                        sun7i:CUBIETRUCK,SPL_FEL                                                                                                          -
+Active  arm         armv7          sunxi       -               sunxi               Cubietruck_FEL                        sun7i:CUBIETRUCK,SPL_FEL,SUNXI_GMAC,RGMII                                                                                         -
 Active  arm         armv7          u8500       st-ericsson     snowball            snowball                              -                                                                                                                                 Mathieu Poirier <mathieu.poirier@linaro.org>
 Active  arm         armv7          u8500       st-ericsson     u8500               u8500_href                            -                                                                                                                                 -
 Active  arm         armv7          vf610       freescale       vf610twr            vf610twr                              vf610twr:IMX_CONFIG=board/freescale/vf610twr/imximage.cfg                                                                         Alison Wang <b18965@freescale.com>

include/configs/sunxi-common.h

@@ -127,6 +127,23 @@
 
 #define CONFIG_CONS_INDEX              1       /* UART0 */
 
+#ifdef CONFIG_SUNXI_GMAC
+#define CONFIG_DESIGNWARE_ETH		/* GMAC can use designware driver */
+#define CONFIG_DW_AUTONEG
+#define CONFIG_PHY_GIGE			/* GMAC can use gigabit PHY	*/
+#define CONFIG_PHY_ADDR		1
+#define CONFIG_MII			/* MII PHY management		*/
+#define CONFIG_PHYLIB
+#endif
+
+#ifdef CONFIG_CMD_NET
+#define CONFIG_CMD_NFS
+#define CONFIG_CMD_DNS
+#define CONFIG_NETCONSOLE
+#define CONFIG_BOOTP_DNS2
+#define CONFIG_BOOTP_SEND_HOSTNAME
+#endif
+
 #if !defined CONFIG_ENV_IS_IN_MMC && \
     !defined CONFIG_ENV_IS_IN_NAND && \
     !defined CONFIG_ENV_IS_IN_FAT && \

include/netdev.h

@@ -78,6 +78,7 @@ int sh_eth_initialize(bd_t *bis);
 int skge_initialize(bd_t *bis);
 int smc91111_initialize(u8 dev_num, int base_addr);
 int smc911x_initialize(u8 dev_num, int base_addr);
+int sunxi_gmac_initialize(bd_t *bis);
 int sunxi_wemac_initialize(bd_t *bis);
 int tsi108_eth_initialize(bd_t *bis);
 int uec_standard_init(bd_t *bis);