davinci: dm365: EMAC support for SoC and dm365 EVM

The patch adds Support for EMAC in the DM365 SOC and
the DM365 EVM board.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 122 insertions, 2 deletions

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 08c2f12d03d1..9dda3999c8f3 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -19,12 +19,12 @@
 #include <linux/i2c.h>
 #include <linux/io.h>
 #include <linux/clk.h>
-
+#include <linux/i2c/at24.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
-
+#include <mach/mux.h>
 #include <mach/hardware.h>
 #include <mach/dm365.h>
 #include <mach/psc.h>
@@ -34,14 +34,69 @@
 #include <mach/serial.h>
 #include <mach/common.h>
 
+#define DM365_EVM_PHY_MASK              (0x2)
+#define DM365_EVM_MDIO_FREQUENCY        (2200000) /* PHY bus frequency */
+
+static struct at24_platform_data eeprom_info = {
+        .byte_len       = (256*1024) / 8,
+        .page_size      = 64,
+        .flags          = AT24_FLAG_ADDR16,
+        .setup          = davinci_get_mac_addr,
+        .context        = (void *)0x7f00,
+};
+
+static struct i2c_board_info i2c_info[] = {
+        {
+                I2C_BOARD_INFO("24c256", 0x50),
+                .platform_data  = &eeprom_info,
+        },
+};
+
 static struct davinci_i2c_platform_data i2c_pdata = {
         .bus_freq       = 400   /* kHz */,
         .bus_delay      = 0     /* usec */,
 };
 
+static void dm365evm_emac_configure(void)
+{
+        /*
+         * EMAC pins are multiplexed with GPIO and UART
+         * Further details are available at the DM365 ARM
+         * Subsystem Users Guide(sprufg5.pdf) pages 125 - 127
+         */
+        davinci_cfg_reg(DM365_EMAC_TX_EN);
+        davinci_cfg_reg(DM365_EMAC_TX_CLK);
+        davinci_cfg_reg(DM365_EMAC_COL);
+        davinci_cfg_reg(DM365_EMAC_TXD3);
+        davinci_cfg_reg(DM365_EMAC_TXD2);
+        davinci_cfg_reg(DM365_EMAC_TXD1);
+        davinci_cfg_reg(DM365_EMAC_TXD0);
+        davinci_cfg_reg(DM365_EMAC_RXD3);
+        davinci_cfg_reg(DM365_EMAC_RXD2);
+        davinci_cfg_reg(DM365_EMAC_RXD1);
+        davinci_cfg_reg(DM365_EMAC_RXD0);
+        davinci_cfg_reg(DM365_EMAC_RX_CLK);
+        davinci_cfg_reg(DM365_EMAC_RX_DV);
+        davinci_cfg_reg(DM365_EMAC_RX_ER);
+        davinci_cfg_reg(DM365_EMAC_CRS);
+        davinci_cfg_reg(DM365_EMAC_MDIO);
+        davinci_cfg_reg(DM365_EMAC_MDCLK);
+
+        /*
+         * EMAC interrupts are multiplexed with GPIO interrupts
+         * Details are available at the DM365 ARM
+         * Subsystem Users Guide(sprufg5.pdf) pages 133 - 134
+         */
+        davinci_cfg_reg(DM365_INT_EMAC_RXTHRESH);
+        davinci_cfg_reg(DM365_INT_EMAC_RXPULSE);
+        davinci_cfg_reg(DM365_INT_EMAC_TXPULSE);
+        davinci_cfg_reg(DM365_INT_EMAC_MISCPULSE);
+}
+
 static void __init evm_init_i2c(void)
 {
         davinci_init_i2c(&i2c_pdata);
+        i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
 }
 
 static struct davinci_uart_config uart_config __initdata = {
@@ -55,8 +110,15 @@ static void __init dm365_evm_map_io(void)
 
 static __init void dm365_evm_init(void)
 {
+        struct davinci_soc_info *soc_info = &davinci_soc_info;
+
         evm_init_i2c();
         davinci_serial_init(&uart_config);
+
+        dm365evm_emac_configure();
+
+        soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK;
+        soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY;
 }
 
 static __init void dm365_evm_irq_init(void)
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index c9ae97a476a4..9d615db4463c 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -546,6 +546,52 @@ INT_CFG(DM365,  INT_EMAC_MISCPULSE,  17,    1,    1,     false)
 #endif
 };
 
+static struct emac_platform_data dm365_emac_pdata = {
+        .ctrl_reg_offset        = DM365_EMAC_CNTRL_OFFSET,
+        .ctrl_mod_reg_offset    = DM365_EMAC_CNTRL_MOD_OFFSET,
+        .ctrl_ram_offset        = DM365_EMAC_CNTRL_RAM_OFFSET,
+        .mdio_reg_offset        = DM365_EMAC_MDIO_OFFSET,
+        .ctrl_ram_size          = DM365_EMAC_CNTRL_RAM_SIZE,
+        .version                = EMAC_VERSION_2,
+};
+
+static struct resource dm365_emac_resources[] = {
+        {
+                .start  = DM365_EMAC_BASE,
+                .end    = DM365_EMAC_BASE + 0x47ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = IRQ_DM365_EMAC_RXTHRESH,
+                .end    = IRQ_DM365_EMAC_RXTHRESH,
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                .start  = IRQ_DM365_EMAC_RXPULSE,
+                .end    = IRQ_DM365_EMAC_RXPULSE,
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                .start  = IRQ_DM365_EMAC_TXPULSE,
+                .end    = IRQ_DM365_EMAC_TXPULSE,
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                .start  = IRQ_DM365_EMAC_MISCPULSE,
+                .end    = IRQ_DM365_EMAC_MISCPULSE,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device dm365_emac_device = {
+        .name           = "davinci_emac",
+        .id             = 1,
+        .dev = {
+                .platform_data  = &dm365_emac_pdata,
+        },
+        .num_resources  = ARRAY_SIZE(dm365_emac_resources),
+        .resource       = dm365_emac_resources,
+};
 
 static u8 dm365_default_priorities[DAVINCI_N_AINTC_IRQ] = {
         [IRQ_VDINT0]                    = 2,
@@ -702,6 +748,7 @@ static struct davinci_soc_info davinci_soc_info_dm365 = {
         .gpio_num               = 104,
         .gpio_irq               = 44,
         .serial_dev             = &dm365_serial_device,
+        .emac_pdata             = &dm365_emac_pdata,
         .sram_dma               = 0x00010000,
         .sram_len               = SZ_32K,
 };
@@ -710,3 +757,14 @@ void __init dm365_init(void)
 {
         davinci_common_init(&davinci_soc_info_dm365);
 }
+
+static int __init dm365_init_devices(void)
+{
+        if (!cpu_is_davinci_dm365())
+                return 0;
+
+        platform_device_register(&dm365_emac_device);
+
+        return 0;
+}
+postcore_initcall(dm365_init_devices);