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 regval;
  43
  44         regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  45         regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
  46                   AM35XX_CPGMAC_C0_TX_PULSE_CLR |
  47                   AM35XX_CPGMAC_C0_MISC_PULSE_CLR |
  48                   AM35XX_CPGMAC_C0_RX_THRESH_CLR);
  49         omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
  50         regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  51 }
  52
  53 static void am35xx_disable_emac_int(void)
  54 {
  55         u32 regval;
  56
  57         regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  58         regval = (regval | AM35XX_CPGMAC_C0_RX_PULSE_CLR |
  59                   AM35XX_CPGMAC_C0_TX_PULSE_CLR);
  60         omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
  61         regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
  62 }
  63
  64 static struct emac_platform_data am35xx_emac_pdata = {
  65         .ctrl_reg_offset        = AM35XX_EMAC_CNTRL_OFFSET,
  66         .ctrl_mod_reg_offset    = AM35XX_EMAC_CNTRL_MOD_OFFSET,
  67         .ctrl_ram_offset        = AM35XX_EMAC_CNTRL_RAM_OFFSET,
  68         .ctrl_ram_size          = AM35XX_EMAC_CNTRL_RAM_SIZE,
  69         .hw_ram_addr            = AM35XX_EMAC_HW_RAM_ADDR,
  70         .version                = EMAC_VERSION_2,
  71         .interrupt_enable       = am35xx_enable_emac_int,
  72         .interrupt_disable      = am35xx_disable_emac_int,
  73 };
  74
  75 static struct resource am35xx_emac_resources[] = {
  76         DEFINE_RES_MEM(AM35XX_IPSS_EMAC_BASE, 0x30000),
  77         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RXTHRESH_IRQ),
  78         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_RX_PULSE_IRQ),
  79         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_TX_PULSE_IRQ),
  80         DEFINE_RES_IRQ(INT_35XX_EMAC_C0_MISC_PULSE_IRQ),
  81 };
  82
  83 static struct platform_device am35xx_emac_device = {
  84         .name           = "davinci_emac",
  85         .id             = -1,
  86         .num_resources  = ARRAY_SIZE(am35xx_emac_resources),
  87         .resource       = am35xx_emac_resources,
  88         .dev            = {
  89                 .platform_data  = &am35xx_emac_pdata,
  90         },
  91 };
  92
  93 void __init am35xx_emac_init(unsigned long mdio_bus_freq, u8 rmii_en)
  94 {
  95         unsigned int regval;
  96         int err;
  97
  98         am35xx_emac_pdata.rmii_en = rmii_en;
  99         am35xx_emac_mdio_pdata.bus_freq = mdio_bus_freq;
 100         err = platform_device_register(&am35xx_emac_device);
 101         if (err) {
 102                 pr_err("AM35x: failed registering EMAC device: %d\n", err);
 103                 return;
 104         }
 105
 106         err = platform_device_register(&am35xx_emac_mdio_device);
 107         if (err) {
 108                 pr_err("AM35x: failed registering EMAC MDIO device: %d\n", err);
 109                 platform_device_unregister(&am35xx_emac_device);
 110                 return;
 111         }
 112
 113         regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
 114         regval = regval & (~(AM35XX_CPGMACSS_SW_RST));
 115         omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET);
 116         regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
 117 }