[U-Boot] [PATCH v2] net: davinci_emac: convert to using the driver model

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Now that we removed all legacy boards selecting TI_EMAC we can
completely convert the driver code to using the driver model.
This patch also updates all remaining users of davinci_emac.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
v1 -> v2:
- moved the packetp assignment to the top of the recv() callback which fixes
  a crash on am3517_evm
- dropped a redundant call to net_process_received_packet(): this is already
  called from eth core

Thanks goes to Adam Ford for much appreciated testing and help.

Tested on da850-lcdk and da850-evm.

 arch/arm/mach-davinci/cpu.c            | 13 -----
 arch/arm/mach-omap2/omap3/emac.c       |  3 +-
 board/davinci/da8xxevm/da850evm.c      |  6 --
 board/davinci/da8xxevm/omapl138_lcdk.c | 14 -----
 board/logicpd/am3517evm/am3517evm.c    |  1 -
 board/ti/ti816x/evm.c                  |  3 +-
 configs/am3517_evm_defconfig           |  1 +
 configs/da850evm_defconfig             |  1 +
 configs/da850evm_direct_nor_defconfig  |  1 +
 configs/da850evm_nand_defconfig        |  1 +
 configs/omapl138_lcdk_defconfig        |  1 +
 configs/ti816x_evm_defconfig           |  1 +
 drivers/net/ti/davinci_emac.c          | 77 ++++++++++++++------------
 include/netdev.h                       |  1 -
 14 files changed, 50 insertions(+), 74 deletions(-)

diff --git a/arch/arm/mach-davinci/cpu.c b/arch/arm/mach-davinci/cpu.c
index f97ad3fc74..9fd6564d04 100644
--- a/arch/arm/mach-davinci/cpu.c
+++ b/arch/arm/mach-davinci/cpu.c
@@ -5,7 +5,6 @@
  */
 
 #include <common.h>
-#include <netdev.h>
 #include <asm/arch/hardware.h>
 #include <asm/io.h>
 
@@ -90,15 +89,3 @@ int set_cpu_clk_info(void)
 	gd->bd->bi_dsp_freq = 0;
 	return 0;
 }
-
-/*
- * Initializes on-chip ethernet controllers.
- * to override, implement board_eth_init()
- */
-int cpu_eth_init(bd_t *bis)
-{
-#if defined(CONFIG_DRIVER_TI_EMAC)
-	davinci_emac_initialize();
-#endif
-	return 0;
-}
diff --git a/arch/arm/mach-omap2/omap3/emac.c b/arch/arm/mach-omap2/omap3/emac.c
index c79e870183..fb0c9188f5 100644
--- a/arch/arm/mach-omap2/omap3/emac.c
+++ b/arch/arm/mach-omap2/omap3/emac.c
@@ -7,7 +7,6 @@
  */
 
 #include <common.h>
-#include <netdev.h>
 #include <asm/io.h>
 #include <asm/arch/am35x_def.h>
 
@@ -24,5 +23,5 @@ int cpu_eth_init(bd_t *bis)
 	reset &= ~CPGMACSS_SW_RST;
 	writel(reset, &am35x_scm_general_regs->ip_sw_reset);
 
-	return davinci_emac_initialize();
+	return 0;
 }
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index a90b7a3538..a5c583444d 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -13,7 +13,6 @@
 #include <environment.h>
 #include <i2c.h>
 #include <net.h>
-#include <netdev.h>
 #include <spi.h>
 #include <spi_flash.h>
 #include <asm/arch/hardware.h>
@@ -472,11 +471,6 @@ int board_eth_init(bd_t *bis)
 	if (rmii_hw_init())
 		printf("RMII hardware init failed!!!\n");
 #endif
-	if (!davinci_emac_initialize()) {
-		printf("Error: Ethernet init failed!\n");
-		return -1;
-	}
-
 	return 0;
 }
 #endif /* CONFIG_DRIVER_TI_EMAC */
diff --git a/board/davinci/da8xxevm/omapl138_lcdk.c b/board/davinci/da8xxevm/omapl138_lcdk.c
index fe1bf44101..dd11551428 100644
--- a/board/davinci/da8xxevm/omapl138_lcdk.c
+++ b/board/davinci/da8xxevm/omapl138_lcdk.c
@@ -11,7 +11,6 @@
 #include <common.h>
 #include <i2c.h>
 #include <net.h>
-#include <netdev.h>
 #include <spi.h>
 #include <spi_flash.h>
 #include <asm/arch/hardware.h>
@@ -229,19 +228,6 @@ int board_init(void)
 
 #ifdef CONFIG_DRIVER_TI_EMAC
 
-/*
- * Initializes on-board ethernet controllers.
- */
-int board_eth_init(bd_t *bis)
-{
-	if (!davinci_emac_initialize()) {
-		printf("Error: Ethernet init failed!\n");
-		return -1;
-	}
-
-	return 0;
-}
-
 #endif /* CONFIG_DRIVER_TI_EMAC */
 
 #define CFG_MAC_ADDR_SPI_BUS	0
diff --git a/board/logicpd/am3517evm/am3517evm.c b/board/logicpd/am3517evm/am3517evm.c
index 10031a4801..bfd4e78274 100644
--- a/board/logicpd/am3517evm/am3517evm.c
+++ b/board/logicpd/am3517evm/am3517evm.c
@@ -28,7 +28,6 @@
 #include <linux/usb/gadget.h>
 #include <linux/usb/musb.h>
 #include <i2c.h>
-#include <netdev.h>
 #include "am3517evm.h"
 
 DECLARE_GLOBAL_DATA_PTR;
diff --git a/board/ti/ti816x/evm.c b/board/ti/ti816x/evm.c
index 07a084bab8..240df8cbe1 100644
--- a/board/ti/ti816x/evm.c
+++ b/board/ti/ti816x/evm.c
@@ -9,7 +9,6 @@
 #include <common.h>
 #include <environment.h>
 #include <spl.h>
-#include <netdev.h>
 #include <asm/cache.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
@@ -56,7 +55,7 @@ int board_eth_init(bd_t *bis)
 			printf("Unable to read MAC address. Set <ethaddr>\n");
 	}
 
-	return davinci_emac_initialize();
+	return 0;
 }
 
 #ifdef CONFIG_SPL_BUILD
diff --git a/configs/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index b9f59f3291..5cb76322df 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -44,6 +44,7 @@ CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
 CONFIG_SYS_NAND_U_BOOT_LOCATIONS=y
 CONFIG_SYS_NAND_U_BOOT_OFFS=0x80000
 CONFIG_SPL_NAND_SIMPLE=y
+CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_PINCTRL=y
diff --git a/configs/da850evm_defconfig b/configs/da850evm_defconfig
index c095058282..f7c679d3b5 100644
--- a/configs/da850evm_defconfig
+++ b/configs/da850evm_defconfig
@@ -59,6 +59,7 @@ CONFIG_SF_DEFAULT_SPEED=30000000
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SPI_FLASH_MTD=y
+CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_PINCTRL=y
diff --git a/configs/da850evm_direct_nor_defconfig b/configs/da850evm_direct_nor_defconfig
index 166e77b8e3..9b1da07384 100644
--- a/configs/da850evm_direct_nor_defconfig
+++ b/configs/da850evm_direct_nor_defconfig
@@ -50,6 +50,7 @@ CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_PINCTRL=y
diff --git a/configs/da850evm_nand_defconfig b/configs/da850evm_nand_defconfig
index 7271016346..8f06b8592b 100644
--- a/configs/da850evm_nand_defconfig
+++ b/configs/da850evm_nand_defconfig
@@ -59,6 +59,7 @@ CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SPI_FLASH_MTD=y
+CONFIG_DM_ETH=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_DM_SERIAL=y
diff --git a/configs/omapl138_lcdk_defconfig b/configs/omapl138_lcdk_defconfig
index 48f251ebb8..466ae860cd 100644
--- a/configs/omapl138_lcdk_defconfig
+++ b/configs/omapl138_lcdk_defconfig
@@ -49,6 +49,7 @@ CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_SPEED=30000000
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_DM_SERIAL=y
diff --git a/configs/ti816x_evm_defconfig b/configs/ti816x_evm_defconfig
index bf877f596b..b233ab8cc9 100644
--- a/configs/ti816x_evm_defconfig
+++ b/configs/ti816x_evm_defconfig
@@ -45,6 +45,7 @@ CONFIG_SYS_I2C_OMAP24XX=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
 CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
+CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
 CONFIG_SYS_NS16550=y
diff --git a/drivers/net/ti/davinci_emac.c b/drivers/net/ti/davinci_emac.c
index 9d53984973..2bd9c51079 100644
--- a/drivers/net/ti/davinci_emac.c
+++ b/drivers/net/ti/davinci_emac.c
@@ -26,7 +26,6 @@
 #include <net.h>
 #include <miiphy.h>
 #include <malloc.h>
-#include <netdev.h>
 #include <linux/compiler.h>
 #include <asm/arch/emac_defs.h>
 #include <asm/io.h>
@@ -107,8 +106,9 @@ static u_int8_t	num_phy;
 
 phy_t				phy[CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT];
 
-static int davinci_eth_set_mac_addr(struct eth_device *dev)
+static int davinci_emac_write_hwaddr(struct udevice *dev)
 {
+	struct eth_pdata *pdata = dev_get_platdata(dev);
 	unsigned long		mac_hi;
 	unsigned long		mac_lo;
 
@@ -118,12 +118,12 @@ static int davinci_eth_set_mac_addr(struct eth_device *dev)
 	 *  Using channel 0 only - other channels are disabled
 	 *  */
 	writel(0, &adap_emac->MACINDEX);
-	mac_hi = (dev->enetaddr[3] << 24) |
-		 (dev->enetaddr[2] << 16) |
-		 (dev->enetaddr[1] << 8)  |
-		 (dev->enetaddr[0]);
-	mac_lo = (dev->enetaddr[5] << 8) |
-		 (dev->enetaddr[4]);
+	mac_hi = (pdata->enetaddr[3] << 24) |
+		 (pdata->enetaddr[2] << 16) |
+		 (pdata->enetaddr[1] << 8)  |
+		 (pdata->enetaddr[0]);
+	mac_lo = (pdata->enetaddr[5] << 8) |
+		 (pdata->enetaddr[4]);
 
 	writel(mac_hi, &adap_emac->MACADDRHI);
 #if defined(DAVINCI_EMAC_VERSION2)
@@ -411,7 +411,7 @@ static void  __attribute__((unused)) davinci_eth_gigabit_enable(int phy_addr)
 }
 
 /* Eth device open */
-static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
+static int davinci_emac_start(struct udevice *dev)
 {
 	dv_reg_p		addr;
 	u_int32_t		clkdiv, cnt, mac_control;
@@ -447,7 +447,7 @@ static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
 	writel(1, &adap_emac->TXCONTROL);
 	writel(1, &adap_emac->RXCONTROL);
 
-	davinci_eth_set_mac_addr(dev);
+	davinci_emac_write_hwaddr(dev);
 
 	/* Set DMA 8 TX / 8 RX Head pointers to 0 */
 	addr = &adap_emac->TX0HDP;
@@ -588,7 +588,7 @@ static void davinci_eth_ch_teardown(int ch)
 }
 
 /* Eth device close */
-static void davinci_eth_close(struct eth_device *dev)
+static void davinci_emac_stop(struct udevice *dev)
 {
 	debug_emac("+ emac_close\n");
 
@@ -619,8 +619,8 @@ static int tx_send_loop = 0;
  * This function sends a single packet on the network and returns
  * positive number (number of bytes transmitted) or negative for error
  */
-static int davinci_eth_send_packet (struct eth_device *dev,
-					void *packet, int length)
+static int davinci_emac_send(struct udevice *dev,
+			     void *packet, int length)
 {
 	int ret_status = -1;
 	int index;
@@ -672,7 +672,7 @@ static int davinci_eth_send_packet (struct eth_device *dev,
 /*
  * This function handles receipt of a packet from the network
  */
-static int davinci_eth_rcv_packet (struct eth_device *dev)
+static int davinci_emac_recv(struct udevice *dev, int flags, uchar **packetp)
 {
 	volatile emac_desc *rx_curr_desc;
 	volatile emac_desc *curr_desc;
@@ -682,6 +682,7 @@ static int davinci_eth_rcv_packet (struct eth_device *dev)
 	rx_curr_desc = emac_rx_active_head;
 	if (!rx_curr_desc)
 		return 0;
+	*packetp = rx_curr_desc->buffer;
 	status = rx_curr_desc->pkt_flag_len;
 	if ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0) {
 		if (status & EMAC_CPPI_RX_ERROR_FRAME) {
@@ -693,7 +694,6 @@ static int davinci_eth_rcv_packet (struct eth_device *dev)
 				rx_curr_desc->buff_off_len & 0xffff;
 
 			invalidate_dcache_range(tmp, tmp + ALIGN(len, PKTALIGN));
-			net_process_received_packet(rx_curr_desc->buffer, len);
 			ret = len;
 		}
 
@@ -742,6 +742,7 @@ static int davinci_eth_rcv_packet (struct eth_device *dev)
 		}
 		return (ret);
 	}
+
 	return (0);
 }
 
@@ -750,30 +751,12 @@ static int davinci_eth_rcv_packet (struct eth_device *dev)
  * EMAC modules power or pin multiplexors, that is done by board_init()
  * much earlier in bootup process. Returns 1 on success, 0 otherwise.
  */
-int davinci_emac_initialize(void)
+static int davinci_emac_probe(struct udevice *dev)
 {
 	u_int32_t	phy_id;
 	u_int16_t	tmp;
 	int		i;
 	int		ret;
-	struct eth_device *dev;
-
-	dev = malloc(sizeof *dev);
-
-	if (dev == NULL)
-		return -1;
-
-	memset(dev, 0, sizeof *dev);
-	strcpy(dev->name, "DaVinci-EMAC");
-
-	dev->iobase = 0;
-	dev->init = davinci_eth_open;
-	dev->halt = davinci_eth_close;
-	dev->send = davinci_eth_send_packet;
-	dev->recv = davinci_eth_rcv_packet;
-	dev->write_hwaddr = davinci_eth_set_mac_addr;
-
-	eth_register(dev);
 
 	davinci_eth_mdio_enable();
 
@@ -854,5 +837,29 @@ int davinci_emac_initialize(void)
 			phy[i].auto_negotiate(i);
 	}
 #endif
-	return(1);
+	return 0;
 }
+
+static const struct eth_ops davinci_emac_ops = {
+	.start		= davinci_emac_start,
+	.send		= davinci_emac_send,
+	.recv		= davinci_emac_recv,
+	.stop		= davinci_emac_stop,
+	.write_hwaddr	= davinci_emac_write_hwaddr,
+};
+
+static const struct udevice_id davinci_emac_ids[] = {
+	{ .compatible = "ti,davinci-dm6467-emac" },
+	{ .compatible = "ti,am3517-emac", },
+	{ .compatible = "ti,dm816-emac", },
+	{ }
+};
+
+U_BOOT_DRIVER(davinci_emac) = {
+	.name		= "davinci_emac",
+	.id		= UCLASS_ETH,
+	.of_match	= davinci_emac_ids,
+	.probe		= davinci_emac_probe,
+	.ops		= &davinci_emac_ops,
+	.platdata_auto_alloc_size = sizeof(struct eth_pdata),
+};
diff --git a/include/netdev.h b/include/netdev.h
index 0a1a3a2d8d..a40c4adaad 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -30,7 +30,6 @@ int bcm_sf2_eth_register(bd_t *bis, u8 dev_num);
 int bfin_EMAC_initialize(bd_t *bis);
 int calxedaxgmac_initialize(u32 id, ulong base_addr);
 int cs8900_initialize(u8 dev_num, int base_addr);
-int davinci_emac_initialize(void);
 int dc21x4x_initialize(bd_t *bis);
 int designware_initialize(ulong base_addr, u32 interface);
 int dm9000_initialize(bd_t *bis);
-- 
2.21.0