1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <console/console.h>
4 #include <device/device.h>
5 #include <device/mdio.h>
6 #include <device/pci.h>
7 #include "chip.h"
8 #include "m88e1512.h"
9
switch_page(struct device * dev,uint8_t page)10 static void switch_page(struct device *dev, uint8_t page)
11 {
12 mdio_write(dev, PAGE_REG, page);
13 }
14
m88e1512_init(struct device * dev)15 static void m88e1512_init(struct device *dev)
16 {
17 struct drivers_net_phy_m88e1512_config *config = dev->chip_info;
18 uint16_t reg;
19
20 /* Enable downshift. */
21 if (config->downshift_cnt) {
22 if (config->downshift_cnt > DOWNSHIFT_CNT_MAX) {
23 printk(BIOS_INFO, "%s: Downshift counter for %s is too large.\n",
24 dev_path(dev->upstream->dev), dev->chip_ops->name);
25 } else {
26 printk(BIOS_DEBUG, "%s: Enable downshift after %d attempts for %s.\n",
27 dev_path(dev->upstream->dev), config->downshift_cnt,
28 dev->chip_ops->name);
29
30 reg = mdio_read(dev, COPPER_SPEC_CTRL_REG_1);
31 clrsetbits16(®, DOWNSHIFT_CNT_MASK,
32 DOWNSHIFT_CNT(config->downshift_cnt) | DOWNSHIFT_EN);
33 mdio_write(dev, COPPER_SPEC_CTRL_REG_1, reg);
34
35 /* Downshift enable requires a software reset to take effect. */
36 reg = mdio_read(dev, COPPER_CTRL_REG);
37 setbits16(®, SOFTWARE_RESET);
38 mdio_write(dev, COPPER_CTRL_REG, reg);
39 }
40 }
41
42 /* Configure LEDs if requested. */
43 if (config->configure_leds) {
44 printk(BIOS_DEBUG, "%s: Set a customized LED mode for %s.\n",
45 dev_path(dev->upstream->dev), dev->chip_ops->name);
46
47 /* Select page 3 to access LED function control register. */
48 switch_page(dev, 3);
49
50 /* Modify PHY LED mode. */
51 reg = mdio_read(dev, LED_FUNC_CTRL_REG);
52 clrsetbits16(®, LED_FUNC_CTRL_MASK, config->led_0_ctrl |
53 (config->led_1_ctrl << 4) | (config->led_2_ctrl << 8));
54 mdio_write(dev, LED_FUNC_CTRL_REG, reg);
55 }
56
57 /* INTn can be routed to LED[2] pin. */
58 if (config->enable_int) {
59 printk(BIOS_DEBUG, "%s: INTn is routed to LED[2] pin %s.\n",
60 dev_path(dev->upstream->dev), dev->chip_ops->name);
61
62 /* Select page 3 to access LED function control register. */
63 switch_page(dev, 3);
64
65 reg = mdio_read(dev, LED_TIMER_CTRL_REG);
66 setbits16(®, LED_IRQ_ENABLE);
67 mdio_write(dev, LED_TIMER_CTRL_REG, reg);
68 }
69
70 /* Set RGMII output impedance manually. */
71 if (config->force_mos) {
72 printk(BIOS_DEBUG, "%s: Set RGMII driver strength manually for %s.\n",
73 dev_path(dev->upstream->dev), dev->chip_ops->name);
74
75 /* Select page 2 to access RGMII output impedance calibration override
76 register. */
77 switch_page(dev, 2);
78
79 reg = mdio_read(dev, OUT_IMP_CAL_OVERRIDE_REG);
80 /* Set first only NMOS/PMOS values. */
81 clrsetbits16(®, MOS_VALUE_MASK, PMOS_VALUE(config->pmos_val) |
82 NMOS_VALUE(config->nmos_val));
83 mdio_write(dev, OUT_IMP_CAL_OVERRIDE_REG, reg);
84 /* Activate the new setting. */
85 setbits16(®, FORCE_MOS);
86 mdio_write(dev, OUT_IMP_CAL_OVERRIDE_REG, reg);
87 }
88
89 /* Switch back to page 0. */
90 switch_page(dev, 0);
91 }
92
93 struct device_operations m88e1512_ops = {
94 .read_resources = noop_read_resources,
95 .set_resources = noop_set_resources,
96 .init = m88e1512_init,
97 };
98
99 struct chip_operations drivers_net_phy_m88e1512_ops = {
100 .name = "88E1512",
101 };
102