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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 | } |