1 /* Copyright OpenWrt.org (C) 2015.
2 * Copyright Altera Corporation (C) 2014. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 * Adopted from dwmac-socfpga.c
17 * Based on code found in mach-oxnas.c
20 #include <linux/mfd/syscon.h>
22 #include <linux/of_address.h>
23 #include <linux/of_net.h>
24 #include <linux/phy.h>
25 #include <linux/regmap.h>
26 #include <linux/reset.h>
27 #include <linux/stmmac.h>
28 #include <linux/version.h>
30 #include <mach/hardware.h>
33 #include "stmmac_platform.h"
39 static int oxnas_gmac_init(struct platform_device
*pdev
, void *priv
)
41 struct oxnas_gmac
*bsp_priv
= priv
;
45 ret
= device_reset(&pdev
->dev
);
49 if (IS_ERR(bsp_priv
->clk
))
50 return PTR_ERR(bsp_priv
->clk
);
51 clk_prepare_enable(bsp_priv
->clk
);
53 value
= readl(SYS_CTRL_GMAC_CTRL
);
55 /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
56 value
|= BIT(SYS_CTRL_GMAC_CKEN_GTX
);
57 /* Use simple mux for 25/125 Mhz clock switching */
58 value
|= BIT(SYS_CTRL_GMAC_SIMPLE_MUX
);
59 /* set auto switch tx clock source */
60 value
|= BIT(SYS_CTRL_GMAC_AUTO_TX_SOURCE
);
61 /* enable tx & rx vardelay */
62 value
|= BIT(SYS_CTRL_GMAC_CKEN_TX_OUT
);
63 value
|= BIT(SYS_CTRL_GMAC_CKEN_TXN_OUT
);
64 value
|= BIT(SYS_CTRL_GMAC_CKEN_TX_IN
);
65 value
|= BIT(SYS_CTRL_GMAC_CKEN_RX_OUT
);
66 value
|= BIT(SYS_CTRL_GMAC_CKEN_RXN_OUT
);
67 value
|= BIT(SYS_CTRL_GMAC_CKEN_RX_IN
);
68 writel(value
, SYS_CTRL_GMAC_CTRL
);
70 /* set tx & rx vardelay */
72 value
|= SYS_CTRL_GMAC_TX_VARDELAY(4);
73 value
|= SYS_CTRL_GMAC_TXN_VARDELAY(2);
74 value
|= SYS_CTRL_GMAC_RX_VARDELAY(10);
75 value
|= SYS_CTRL_GMAC_RXN_VARDELAY(8);
76 writel(value
, SYS_CTRL_GMAC_DELAY_CTRL
);
81 static void oxnas_gmac_exit(struct platform_device
*pdev
, void *priv
)
83 struct reset_control
*rstc
;
85 clk_disable_unprepare(priv
);
86 devm_clk_put(&pdev
->dev
, priv
);
88 rstc
= reset_control_get(&pdev
->dev
, NULL
);
90 reset_control_assert(rstc
);
91 reset_control_put(rstc
);
95 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
96 static void *oxnas_gmac_probe(struct platform_device
*pdev
)
99 static int oxnas_gmac_probe(struct platform_device
*pdev
)
101 struct plat_stmmacenet_data
*plat_dat
;
102 struct stmmac_resources stmmac_res
;
105 struct device
*dev
= &pdev
->dev
;
106 struct oxnas_gmac
*bsp_priv
;
108 bsp_priv
= devm_kzalloc(dev
, sizeof(*bsp_priv
), GFP_KERNEL
);
110 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
111 return ERR_PTR(-ENOMEM
);
115 bsp_priv
->clk
= devm_clk_get(dev
, "gmac");
116 if (IS_ERR(bsp_priv
->clk
))
117 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
118 return bsp_priv
->clk
;
120 return PTR_ERR(bsp_priv
->clk
);
123 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
126 ret
= stmmac_get_platform_resources(pdev
, &stmmac_res
);
130 plat_dat
= stmmac_probe_config_dt(pdev
, &stmmac_res
.mac
);
131 if (IS_ERR(plat_dat
))
132 return PTR_ERR(plat_dat
);
134 plat_dat
->bsp_priv
= bsp_priv
;
135 plat_dat
->init
= oxnas_gmac_init
;
136 plat_dat
->exit
= oxnas_gmac_exit
;
138 ret
= oxnas_gmac_init(pdev
, bsp_priv
);
142 return stmmac_dvr_probe(dev
, plat_dat
, &stmmac_res
);
146 #if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
147 const struct stmmac_of_data oxnas_gmac_data
= {
149 .setup
= oxnas_gmac_probe
,
150 .init
= oxnas_gmac_init
,
151 .exit
= oxnas_gmac_exit
,
154 static const struct of_device_id oxnas_gmac_match
[] = {
155 { .compatible
= "plxtech,nas782x-gmac" },
158 MODULE_DEVICE_TABLE(of
, oxnas_gmac_match
);
160 static struct platform_driver oxnas_gmac_driver
= {
161 .probe
= oxnas_gmac_probe
,
162 .remove
= stmmac_pltfr_remove
,
164 .name
= "oxnas-gmac",
165 .pm
= &stmmac_pltfr_pm_ops
,
166 .of_match_table
= oxnas_gmac_match
,
169 module_platform_driver(oxnas_gmac_driver
);
172 MODULE_LICENSE("GPL v2");