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 "omap_device.h"
22 #include "am35xx.h"
23 #include "control.h"
24 #include "am35xx-emac.h"
25
am35xx_enable_emac_int(void)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
am35xx_disable_emac_int(void)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
omap_davinci_emac_dev_init(struct omap_hwmod * oh,void * pdata,int pdata_len)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 if (IS_ERR(pdev)) {
67 WARN(1, "Can't build omap_device for %s:%s.\n",
68 oh->class->name, oh->name);
69 return PTR_ERR(pdev);
70 }
71
72 return 0;
73 }
74
am35xx_emac_init(unsigned long mdio_bus_freq,u8 rmii_en)75 void __init am35xx_emac_init(unsigned long mdio_bus_freq, u8 rmii_en)
76 {
77 struct omap_hwmod *oh;
78 u32 v;
79 int ret;
80
81 oh = omap_hwmod_lookup("davinci_mdio");
82 if (!oh) {
83 pr_err("Could not find davinci_mdio hwmod\n");
84 return;
85 }
86
87 am35xx_mdio_pdata.bus_freq = mdio_bus_freq;
88
89 ret = omap_davinci_emac_dev_init(oh, &am35xx_mdio_pdata,
90 sizeof(am35xx_mdio_pdata));
91 if (ret) {
92 pr_err("Could not build davinci_mdio hwmod device\n");
93 return;
94 }
95
96 oh = omap_hwmod_lookup("davinci_emac");
97 if (!oh) {
98 pr_err("Could not find davinci_emac hwmod\n");
99 return;
100 }
101
102 am35xx_emac_pdata.rmii_en = rmii_en;
103
104 ret = omap_davinci_emac_dev_init(oh, &am35xx_emac_pdata,
105 sizeof(am35xx_emac_pdata));
106 if (ret) {
107 pr_err("Could not build davinci_emac hwmod device\n");
108 return;
109 }
110
111 v = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
112 v &= ~AM35XX_CPGMACSS_SW_RST;
113 omap_ctrl_writel(v, AM35XX_CONTROL_IP_SW_RESET);
114 omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); /* OCP barrier */
115 }
116