ARM: OMAP: move generic EMAC init to separate file

AM35xx SoCs include DaVinci EMAC IP. Initialization code in
board-am3517evm.c is pretty board independent and will work for any
AM35xx based board so move this code to it's own file to be reused by
other boards.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 117 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/am35xx-emac.c b/arch/arm/mach-omap2/am35xx-emac.c
new file mode 100644
index 000000000000..1f97e7475206
--- /dev/null
+++ b/arch/arm/mach-omap2/am35xx-emac.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2011 Ilya Yanok, Emcraft Systems
+ *
+ * Based on mach-omap2/board-am3517evm.c
+ * Copyright (C) 2009 Texas Instruments Incorporated
+ * Author: Ranjith Lohithakshan <ranjithl@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/davinci_emac.h>
+#include <linux/platform_device.h>
+#include <plat/irqs.h>
+#include <mach/am35xx.h>
+
+#include "control.h"
+
+static struct mdio_platform_data am35xx_emac_mdio_pdata;
+
+static struct resource am35xx_emac_mdio_resources[] = {
+        DEFINE_RES_MEM(AM35XX_IPSS_EMAC_BASE + AM35XX_EMAC_MDIO_OFFSET, SZ_4K),
+};
+
+static struct platform_device am35xx_emac_mdio_device = {
+        .name           = "davinci_mdio",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(am35xx_emac_mdio_resources),
+        .resource       = am35xx_emac_mdio_resources,
+        .dev.platform_data = &am35xx_emac_mdio_pdata,
+};
+
+static void am35xx_enable_emac_int(void)
+{
+        u32 regval;
+
+        regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
+        regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
+                  AM35XX_CPGMAC_C0_TX_PULSE_CLR |
+                  AM35XX_CPGMAC_C0_MISC_PULSE_CLR |
+                  AM35XX_CPGMAC_C0_RX_THRESH_CLR);
+        omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
+        regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
+}
+
+static void am35xx_disable_emac_int(void)
+{
+        u32 regval;
+
+        regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
+        regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
+                  AM35XX_CPGMAC_C0_TX_PULSE_CLR);
+        omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
+        regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
+}
+
+static struct emac_platform_data am35xx_emac_pdata = {
+        .ctrl_reg_offset        = AM35XX_EMAC_CNTRL_OFFSET,
+        .ctrl_mod_reg_offset    = AM35XX_EMAC_CNTRL_MOD_OFFSET,
+        .ctrl_ram_offset        = AM35XX_EMAC_CNTRL_RAM_OFFSET,
+        .ctrl_ram_size          = AM35XX_EMAC_CNTRL_RAM_SIZE,
+        .hw_ram_addr            = AM35XX_EMAC_HW_RAM_ADDR,
+        .version                = EMAC_VERSION_2,
+        .interrupt_enable       = am35xx_enable_emac_int,
+        .interrupt_disable      = am35xx_disable_emac_int,
+};
+
+static struct resource am35xx_emac_resources[] = {
+        DEFINE_RES_MEM(AM35XX_IPSS_EMAC_BASE, 0x30000),
+        DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RXTHRESH_IRQ),
+        DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RX_PULSE_IRQ),
+        DEFINE_RES_IRQ(INT_35XX_EMAC_C0_TX_PULSE_IRQ),
+        DEFINE_RES_IRQ(INT_35XX_EMAC_C0_MISC_PULSE_IRQ),
+};
+
+static struct platform_device am35xx_emac_device = {
+        .name           = "davinci_emac",
+        .id             = -1,
+        .num_resources  = ARRAY_SIZE(am35xx_emac_resources),
+        .resource       = am35xx_emac_resources,
+        .dev            = {
+                .platform_data  = &am35xx_emac_pdata,
+        },
+};
+
+void __init am35xx_emac_init(unsigned long mdio_bus_freq, u8 rmii_en)
+{
+        unsigned int regval;
+        int err;
+
+        am35xx_emac_pdata.rmii_en = rmii_en;
+        am35xx_emac_mdio_pdata.bus_freq = mdio_bus_freq;
+        err = platform_device_register(&am35xx_emac_device);
+        if (err) {
+                pr_err("AM35x: failed registering EMAC device: %d\n", err);
+                return;
+        }
+
+        err = platform_device_register(&am35xx_emac_mdio_device);
+        if (err) {
+                pr_err("AM35x: failed registering EMAC MDIO device: %d\n", err);
+                platform_device_unregister(&am35xx_emac_device);
+                return;
+        }
+
+        regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
+        regval = regval & (~(AM35XX_CPGMACSS_SW_RST));
+        omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET);
+        regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
+}