1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* Driver for BayHub Technology BH720 PCI to eMMC 5.0 HS200 bridge */
#include <console/console.h>
#include <device/device.h>
#include <device/path.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "chip.h"
#include "bh720.h"
__attribute__((weak)) void board_bh720(struct device *dev)
{
}
static void bh720_init(struct device *dev)
{
struct drivers_generic_bayhub_config *config = dev->chip_info;
pci_dev_init(dev);
if (config && config->power_saving) {
/*
* This procedure for enabling power-saving mode is from the
* BayHub BIOS Implementation Guideline document.
*/
pci_write_config32(dev, BH720_PROTECT,
BH720_PROTECT_OFF | BH720_PROTECT_LOCK_OFF);
pci_or_config32(dev, BH720_RTD3_L1, BH720_RTD3_L1_DISABLE_L1);
pci_or_config32(dev, BH720_LINK_CTRL,
BH720_LINK_CTRL_L0_ENABLE |
BH720_LINK_CTRL_L1_ENABLE);
pci_or_config32(dev, BH720_LINK_CTRL, BH720_LINK_CTRL_CLKREQ);
pci_update_config32(dev, BH720_MISC2, ~BH720_MISC2_ASPM_DISABLE,
BH720_MISC2_APSM_CLKREQ_L1 |
BH720_MISC2_APSM_PHY_L1);
pci_write_config32(dev, BH720_PROTECT,
BH720_PROTECT_ON | BH720_PROTECT_LOCK_ON);
printk(BIOS_INFO, "BayHub BH720: Power-saving enabled (link_ctrl=%#x)\n",
pci_read_config32(dev, BH720_LINK_CTRL));
}
board_bh720(dev);
if (config && config->vih_tuning_value) {
/* Tune VIH */
u32 bh720_pcr_data;
pci_write_config32(dev, BH720_PROTECT,
BH720_PROTECT_OFF | BH720_PROTECT_LOCK_OFF);
bh720_pcr_data = pci_read_config32(dev, BH720_PCR_DrvStrength_PLL);
bh720_pcr_data &= 0xFFFFFF00;
bh720_pcr_data |= config->vih_tuning_value;
pci_write_config32(dev, BH720_PCR_DrvStrength_PLL, bh720_pcr_data);
pci_write_config32(dev, BH720_PROTECT,
BH720_PROTECT_ON | BH720_PROTECT_LOCK_ON);
}
}
static struct device_operations bh720_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.ops_pci = &pci_dev_ops_pci,
.init = bh720_init,
};
static const unsigned short pci_device_ids[] = {
PCI_DEVICE_ID_O2_BH720,
0
};
static const struct pci_driver bayhub_bh720 __pci_driver = {
.ops = &bh720_ops,
.vendor = PCI_VENDOR_ID_O2,
.devices = pci_device_ids,
};
struct chip_operations drivers_generic_bayhub_ops = {
CHIP_NAME("BayHub Technology BH720 PCI to eMMC 5.0 HS200 bridge")
};
|
