arch/arm/mach-omap2/am35xx-emac.c

   1 /*
   2  * Copyright (C) 2011 Ilya Yanok, Emcraft Systems
   3  *
   4  * Based on mach-omap2/board-am3517evm.c
   5  * Copyright (C) 2009 Texas Instruments Incorporated
   6  * Author: Ranjith Lohithakshan <ranjithl@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
  13  * whether express or implied; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <linux/clk.h>
  19 #include <linux/davinci_emac.h>
  20 #include <linux/platform_device.h>
  21 #include <plat/irqs.h>
  22 #include <mach/am35xx.h>
  23
  24 #include "control.h"
  25
  26 static struct mdio_platform_data am35xx_emac_mdio_pdata;
  27
  28 static struct resource am35xx_emac_mdio_resources[] = {
  29         DEFINE_RES_MEM(AM35XX_IPSS_EMAC_BASE + AM35XX_EMAC_MDIO_OFFSET, SZ_4K),
  30 };
  31
  32 static struct platform_device am35xx_emac_mdio_device = {
  33         .name           = "davinci_mdio",
  34         .id             = 0,
  35         .num_resources  = ARRAY_SIZE(am35xx_emac_mdio_resources),
  36         .resource       = am35xx_emac_mdio_resources,
  37         .dev.platform_data = &am35xx_emac_mdio_pdata,
  38 };
  39
  40 static void am35xx_enable_emac_int(void)
  41 {
  42         u32 v;
  43
  44         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  45         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR |
  46               AM35XX_CPGMAC_C0_MISC_PULSE_CLR | AM35XX_CPGMAC_C0_RX_THRESH_CLR);
  47         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
  48         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
  49 }
  50
  51 static void am35xx_disable_emac_int(void)
  52 {
  53         u32 v;
  54
  55         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  56         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR);
  57         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
  58         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
  59 }
  60
  61 static struct emac_platform_data am35xx_emac_pdata = {
  62         .ctrl_reg_offset        = AM35XX_EMAC_CNTRL_OFFSET,
  63         .ctrl_mod_reg_offset    = AM35XX_EMAC_CNTRL_MOD_OFFSET,
  64         .ctrl_ram_offset        = AM35XX_EMAC_CNTRL_RAM_OFFSET,
  65         .ctrl_ram_size          = AM35XX_EMAC_CNTRL_RAM_SIZE,
  66         .hw_ram_addr            = AM35XX_EMAC_HW_RAM_ADDR,
  67         .version                = EMAC_VERSION_2,
  68         .interrupt_enable       = am35xx_enable_emac_int,
  69         .interrupt_disable      = am35xx_disable_emac_int,
  70 };
  71
  72 static struct resource am35xx_emac_resources[] = {
  73         DEFINE_RES_MEM(AM35XX_IPSS_EMAC_BASE, 0x30000),
  74         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RXTHRESH_IRQ),
  75         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RX_PULSE_IRQ),
  76         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_TX_PULSE_IRQ),
  77         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_MISC_PULSE_IRQ),
  78 };
  79
  80 static struct platform_device am35xx_emac_device = {
  81         .name           = "davinci_emac",
  82         .id             = -1,
  83         .num_resources  = ARRAY_SIZE(am35xx_emac_resources),
  84         .resource       = am35xx_emac_resources,
  85         .dev            = {
  86                 .platform_data  = &am35xx_emac_pdata,
  87         },
  88 };
  89
  90 void __init am35xx_emac_init(unsigned long mdio_bus_freq, u8 rmii_en)
  91 {
  92         u32 v;
  93         int err;
  94
  95         am35xx_emac_pdata.rmii_en = rmii_en;
  96         am35xx_emac_mdio_pdata.bus_freq = mdio_bus_freq;
  97         err = platform_device_register(&am35xx_emac_device);
  98         if (err) {
  99                 pr_err("AM35x: failed registering EMAC device: %d\n", err);
 100                 return;
 101         }
 102
 103         err = platform_device_register(&am35xx_emac_mdio_device);
 104         if (err) {
 105                 pr_err("AM35x: failed registering EMAC MDIO device: %d\n", err);
 106                 platform_device_unregister(&am35xx_emac_device);
 107                 return;
 108         }
 109
 110         v = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
 111         v &= ~AM35XX_CPGMACSS_SW_RST;
 112         omap_ctrl_writel(v, AM35XX_CONTROL_IP_SW_RESET);
 113         omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); /* OCP barrier */
 114 }