Merge branch 'for-linus-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-3.10.git] / 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/err.h>
19 #include <linux/davinci_emac.h>
20 #include <asm/system.h>
21 #include <plat/omap_device.h>
22 #include <mach/am35xx.h>
23 #include "control.h"
24 #include "am35xx-emac.h"
25
26 static void am35xx_enable_emac_int(void)
27 {
28         u32 v;
29
30         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
31         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR |
32               AM35XX_CPGMAC_C0_MISC_PULSE_CLR | AM35XX_CPGMAC_C0_RX_THRESH_CLR);
33         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
34         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
35 }
36
37 static void am35xx_disable_emac_int(void)
38 {
39         u32 v;
40
41         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
42         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR);
43         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
44         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
45 }
46
47 static struct emac_platform_data am35xx_emac_pdata = {
48         .ctrl_reg_offset        = AM35XX_EMAC_CNTRL_OFFSET,
49         .ctrl_mod_reg_offset    = AM35XX_EMAC_CNTRL_MOD_OFFSET,
50         .ctrl_ram_offset        = AM35XX_EMAC_CNTRL_RAM_OFFSET,
51         .ctrl_ram_size          = AM35XX_EMAC_CNTRL_RAM_SIZE,
52         .hw_ram_addr            = AM35XX_EMAC_HW_RAM_ADDR,
53         .version                = EMAC_VERSION_2,
54         .interrupt_enable       = am35xx_enable_emac_int,
55         .interrupt_disable      = am35xx_disable_emac_int,
56 };
57
58 static struct mdio_platform_data am35xx_mdio_pdata;
59
60 static int __init omap_davinci_emac_dev_init(struct omap_hwmod *oh,
61                 void *pdata, int pdata_len)
62 {
63         struct platform_device *pdev;
64
65         pdev = omap_device_build(oh->class->name, 0, oh, pdata, pdata_len,
66                                  NULL, 0, false);
67         if (IS_ERR(pdev)) {
68                 WARN(1, "Can't build omap_device for %s:%s.\n",
69                      oh->class->name, oh->name);
70                 return PTR_ERR(pdev);
71         }
72
73         return 0;
74 }
75
76 void __init am35xx_emac_init(unsigned long mdio_bus_freq, u8 rmii_en)
77 {
78         struct omap_hwmod *oh;
79         u32 v;
80         int ret;
81
82         oh = omap_hwmod_lookup("davinci_mdio");
83         if (!oh) {
84                 pr_err("Could not find davinci_mdio hwmod\n");
85                 return;
86         }
87
88         am35xx_mdio_pdata.bus_freq = mdio_bus_freq;
89
90         ret = omap_davinci_emac_dev_init(oh, &am35xx_mdio_pdata,
91                                          sizeof(am35xx_mdio_pdata));
92         if (ret) {
93                 pr_err("Could not build davinci_mdio hwmod device\n");
94                 return;
95         }
96
97         oh = omap_hwmod_lookup("davinci_emac");
98         if (!oh) {
99                 pr_err("Could not find davinci_emac hwmod\n");
100                 return;
101         }
102
103         am35xx_emac_pdata.rmii_en = rmii_en;
104
105         ret = omap_davinci_emac_dev_init(oh, &am35xx_emac_pdata,
106                                          sizeof(am35xx_emac_pdata));
107         if (ret) {
108                 pr_err("Could not build davinci_emac hwmod device\n");
109                 return;
110         }
111
112         v = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
113         v &= ~AM35XX_CPGMACSS_SW_RST;
114         omap_ctrl_writel(v, AM35XX_CONTROL_IP_SW_RESET);
115         omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); /* OCP barrier */
116 }