1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
4 *
5 * Authors: Igor Grinberg <grinberg@compulab.co.il>
6 */
7
8#include <common.h>
9#include <netdev.h>
10#include <linux/delay.h>
11
12#include <asm/io.h>
13#include <linux/errno.h>
14#include <asm/arch/cpu.h>
15#include <asm/arch/mem.h>
16#include <asm/arch/sys_proto.h>
17#include <asm/gpio.h>
18
19#include "common.h"
20
21static u32 cl_omap3_smc911x_gpmc_net_config[GPMC_MAX_REG] = {
22	NET_GPMC_CONFIG1,
23	NET_GPMC_CONFIG2,
24	NET_GPMC_CONFIG3,
25	NET_GPMC_CONFIG4,
26	NET_GPMC_CONFIG5,
27	NET_GPMC_CONFIG6,
28	0
29};
30
31static void cl_omap3_smc911x_setup_net_chip_gmpc(int cs, u32 base_addr)
32{
33	struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
34
35	enable_gpmc_cs_config(cl_omap3_smc911x_gpmc_net_config,
36			      &gpmc_cfg->cs[cs], base_addr, GPMC_SIZE_16M);
37
38	/* Enable off mode for NWE in PADCONF_GPMC_NWE register */
39	writew(readw(&ctrl_base->gpmc_nwe) | 0x0E00, &ctrl_base->gpmc_nwe);
40
41	/* Enable off mode for NOE in PADCONF_GPMC_NADV_ALE register */
42	writew(readw(&ctrl_base->gpmc_noe) | 0x0E00, &ctrl_base->gpmc_noe);
43
44	/* Enable off mode for ALE in PADCONF_GPMC_NADV_ALE register */
45	writew(readw(&ctrl_base->gpmc_nadv_ale) | 0x0E00,
46	       &ctrl_base->gpmc_nadv_ale);
47}
48
49#ifdef CONFIG_OMAP_GPIO
50static int cl_omap3_smc911x_reset_net_chip(int gpio)
51{
52	int err;
53
54	if (!gpio_is_valid(gpio))
55		return -EINVAL;
56
57	err = gpio_request(gpio, "eth rst");
58	if (err)
59		return err;
60
61	/* Set gpio as output and send a pulse */
62	gpio_direction_output(gpio, 1);
63	udelay(1);
64	gpio_set_value(gpio, 0);
65	mdelay(40);
66	gpio_set_value(gpio, 1);
67	mdelay(1);
68
69	return 0;
70}
71#else /* !CONFIG_OMAP_GPIO */
72static inline int cl_omap3_smc911x_reset_net_chip(int gpio) { return 0; }
73#endif /* CONFIG_OMAP_GPIO */
74
75int cl_omap3_smc911x_init(int id, int cs, u32 base_addr,
76			  int (*reset)(int), int rst_gpio)
77{
78	int ret;
79
80	cl_omap3_smc911x_setup_net_chip_gmpc(cs, base_addr);
81
82	if (reset)
83		reset(rst_gpio);
84	else
85		cl_omap3_smc911x_reset_net_chip(rst_gpio);
86
87	ret = smc911x_initialize(id, base_addr);
88	if (ret > 0)
89		return ret;
90
91	printf("Failed initializing SMC911x! ");
92	return 0;
93}
94