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
am35xx_enable_emac_int(void)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
am35xx_disable_emac_int(void)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
am35xx_emac_init(unsigned long mdio_bus_freq,u8 rmii_en)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 }
118