1 /*
2  * Copyright (C) 2015-2016 Marvell International Ltd.
3  *
4  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <dm.h>
11 #include <fdtdec.h>
12 #include <linux/errno.h>
13 #include <asm/io.h>
14 
15 #include "comphy.h"
16 
17 #define COMPHY_MAX_CHIP 4
18 
19 DECLARE_GLOBAL_DATA_PTR;
20 
21 static char *get_speed_string(u32 speed)
22 {
23 	char *speed_strings[] = {"1.25 Gbps", "1.5 Gbps", "2.5 Gbps",
24 				 "3.0 Gbps", "3.125 Gbps", "5 Gbps", "6 Gbps",
25 				 "6.25 Gbps", "10.31 Gbps" };
26 
27 	if (speed < 0 || speed > PHY_SPEED_MAX)
28 		return "invalid";
29 
30 	return speed_strings[speed];
31 }
32 
33 static char *get_type_string(u32 type)
34 {
35 	char *type_strings[] = {"UNCONNECTED", "PEX0", "PEX1", "PEX2", "PEX3",
36 				"SATA0", "SATA1", "SATA2", "SATA3", "SGMII0",
37 				"SGMII1", "SGMII2", "SGMII3", "QSGMII",
38 				"USB3_HOST0", "USB3_HOST1", "USB3_DEVICE",
39 				"XAUI0", "XAUI1", "XAUI2", "XAUI3",
40 				"RXAUI0", "RXAUI1", "KR"};
41 
42 	if (type < 0 || type > PHY_TYPE_MAX)
43 		return "invalid";
44 
45 	return type_strings[type];
46 }
47 
48 void reg_set(void __iomem *addr, u32 data, u32 mask)
49 {
50 	debug("Write to address = %#010lx, data = %#010x (mask = %#010x) - ",
51 	      (unsigned long)addr, data, mask);
52 	debug("old value = %#010x ==> ", readl(addr));
53 	reg_set_silent(addr, data, mask);
54 	debug("new value %#010x\n", readl(addr));
55 }
56 
57 void reg_set_silent(void __iomem *addr, u32 data, u32 mask)
58 {
59 	u32 reg_data;
60 
61 	reg_data = readl(addr);
62 	reg_data &= ~mask;
63 	reg_data |= data;
64 	writel(reg_data, addr);
65 }
66 
67 void reg_set16(void __iomem *addr, u16 data, u16 mask)
68 {
69 	debug("Write to address = %#010lx, data = %#06x (mask = %#06x) - ",
70 	      (unsigned long)addr, data, mask);
71 	debug("old value = %#06x ==> ", readw(addr));
72 	reg_set_silent16(addr, data, mask);
73 	debug("new value %#06x\n", readw(addr));
74 }
75 
76 void reg_set_silent16(void __iomem *addr, u16 data, u16 mask)
77 {
78 	u16 reg_data;
79 
80 	reg_data = readw(addr);
81 	reg_data &= ~mask;
82 	reg_data |= data;
83 	writew(reg_data, addr);
84 }
85 
86 void comphy_print(struct chip_serdes_phy_config *chip_cfg,
87 		  struct comphy_map *comphy_map_data)
88 {
89 	u32 lane;
90 
91 	for (lane = 0; lane < chip_cfg->comphy_lanes_count;
92 	     lane++, comphy_map_data++) {
93 		if (comphy_map_data->type == PHY_TYPE_UNCONNECTED)
94 			continue;
95 
96 		if (comphy_map_data->speed == PHY_SPEED_INVALID) {
97 			printf("Comphy-%d: %-13s\n", lane,
98 			       get_type_string(comphy_map_data->type));
99 		} else {
100 			printf("Comphy-%d: %-13s %-10s\n", lane,
101 			       get_type_string(comphy_map_data->type),
102 			       get_speed_string(comphy_map_data->speed));
103 		}
104 	}
105 }
106 
107 static int comphy_probe(struct udevice *dev)
108 {
109 	const void *blob = gd->fdt_blob;
110 	int node = dev->of_offset;
111 	struct chip_serdes_phy_config *chip_cfg = dev_get_priv(dev);
112 	struct comphy_map comphy_map_data[MAX_LANE_OPTIONS];
113 	int subnode;
114 	int lane;
115 	int last_idx = 0;
116 
117 	/* Save base addresses for later use */
118 	chip_cfg->comphy_base_addr = (void *)dev_get_addr_index(dev, 0);
119 	if (IS_ERR(chip_cfg->comphy_base_addr))
120 		return PTR_ERR(chip_cfg->comphy_base_addr);
121 
122 	chip_cfg->hpipe3_base_addr = (void *)dev_get_addr_index(dev, 1);
123 	if (IS_ERR(chip_cfg->hpipe3_base_addr))
124 		return PTR_ERR(chip_cfg->hpipe3_base_addr);
125 
126 	chip_cfg->comphy_lanes_count = fdtdec_get_int(blob, node,
127 						      "max-lanes", 0);
128 	if (chip_cfg->comphy_lanes_count <= 0) {
129 		dev_err(&dev->dev, "comphy max lanes is wrong\n");
130 		return -EINVAL;
131 	}
132 
133 	chip_cfg->comphy_mux_bitcount = fdtdec_get_int(blob, node,
134 						       "mux-bitcount", 0);
135 	if (chip_cfg->comphy_mux_bitcount <= 0) {
136 		dev_err(&dev->dev, "comphy mux bit count is wrong\n");
137 		return -EINVAL;
138 	}
139 
140 	if (of_device_is_compatible(dev, "marvell,comphy-armada-3700"))
141 		chip_cfg->ptr_comphy_chip_init = comphy_a3700_init;
142 
143 	if (of_device_is_compatible(dev, "marvell,comphy-cp110"))
144 		chip_cfg->ptr_comphy_chip_init = comphy_cp110_init;
145 
146 	/*
147 	 * Bail out if no chip_init function is defined, e.g. no
148 	 * compatible node is found
149 	 */
150 	if (!chip_cfg->ptr_comphy_chip_init) {
151 		dev_err(&dev->dev, "comphy: No compatible DT node found\n");
152 		return -ENODEV;
153 	}
154 
155 	lane = 0;
156 	fdt_for_each_subnode(subnode, blob, node) {
157 		/* Skip disabled ports */
158 		if (!fdtdec_get_is_enabled(blob, subnode))
159 			continue;
160 
161 		comphy_map_data[lane].speed = fdtdec_get_int(
162 			blob, subnode, "phy-speed", PHY_TYPE_INVALID);
163 		comphy_map_data[lane].type = fdtdec_get_int(
164 			blob, subnode, "phy-type", PHY_SPEED_INVALID);
165 		comphy_map_data[lane].invert = fdtdec_get_int(
166 			blob, subnode, "phy-invert", PHY_POLARITY_NO_INVERT);
167 		comphy_map_data[lane].clk_src = fdtdec_get_bool(blob, subnode,
168 								"clk-src");
169 		if (comphy_map_data[lane].type == PHY_TYPE_INVALID) {
170 			printf("no phy type for lane %d, setting lane as unconnected\n",
171 			       lane + 1);
172 		}
173 
174 		lane++;
175 	}
176 
177 	/* Save comphy index for MultiCP devices (A8K) */
178 	chip_cfg->comphy_index = dev->seq;
179 	/* PHY power UP sequence */
180 	chip_cfg->ptr_comphy_chip_init(chip_cfg, comphy_map_data);
181 	/* PHY print SerDes status */
182 	if (of_machine_is_compatible("marvell,armada8040"))
183 		printf("Comphy chip #%d:\n", chip_cfg->comphy_index);
184 	comphy_print(chip_cfg, comphy_map_data);
185 
186 	/*
187 	 * Only run the dedicated PHY init code once, in the last PHY init call
188 	 */
189 	if (of_machine_is_compatible("marvell,armada8040"))
190 		last_idx = 1;
191 
192 	if (chip_cfg->comphy_index == last_idx) {
193 		/* Initialize dedicated PHYs (not muxed SerDes lanes) */
194 		comphy_dedicated_phys_init();
195 	}
196 
197 	return 0;
198 }
199 
200 static const struct udevice_id comphy_ids[] = {
201 	{ .compatible = "marvell,mvebu-comphy" },
202 	{ }
203 };
204 
205 U_BOOT_DRIVER(mvebu_comphy) = {
206 	.name	= "mvebu_comphy",
207 	.id	= UCLASS_MISC,
208 	.of_match = comphy_ids,
209 	.probe	= comphy_probe,
210 	.priv_auto_alloc_size = sizeof(struct chip_serdes_phy_config),
211 };
212