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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/acpimmio.h>
#include <amdblocks/i2c.h>
#include <amdblocks/lpc.h>
#include <amdblocks/pmlib.h>
#include <amdblocks/reset.h>
#include <amdblocks/smbus.h>
#include <amdblocks/spi.h>
#include <soc/southbridge.h>
#include <types.h>
#include "chip.h"
/* Table to switch SCL pins to outputs to initially reset the I2C peripherals */
static const struct soc_i2c_scl_pin i2c_scl_pins[] = {
I2C_RESET_SCL_PIN(I2C0_SCL_PIN, GPIO_I2C0_SCL),
I2C_RESET_SCL_PIN(I2C1_SCL_PIN, GPIO_I2C1_SCL),
I2C_RESET_SCL_PIN(I2C2_SCL_PIN, GPIO_I2C2_SCL),
I2C_RESET_SCL_PIN(I2C3_SCL_PIN, GPIO_I2C3_SCL),
};
static void sb_lpc_decode(void)
{
u32 tmp = 0;
/* Enable I/O decode to LPC bus */
tmp = DECODE_ENABLE_PARALLEL_PORT0 | DECODE_ENABLE_PARALLEL_PORT2
| DECODE_ENABLE_PARALLEL_PORT4 | DECODE_ENABLE_SERIAL_PORT0
| DECODE_ENABLE_SERIAL_PORT1 | DECODE_ENABLE_SERIAL_PORT2
| DECODE_ENABLE_SERIAL_PORT3 | DECODE_ENABLE_SERIAL_PORT4
| DECODE_ENABLE_SERIAL_PORT5 | DECODE_ENABLE_SERIAL_PORT6
| DECODE_ENABLE_SERIAL_PORT7 | DECODE_ENABLE_AUDIO_PORT0
| DECODE_ENABLE_AUDIO_PORT1 | DECODE_ENABLE_AUDIO_PORT2
| DECODE_ENABLE_AUDIO_PORT3 | DECODE_ENABLE_MSS_PORT2
| DECODE_ENABLE_MSS_PORT3 | DECODE_ENABLE_FDC_PORT0
| DECODE_ENABLE_FDC_PORT1 | DECODE_ENABLE_GAME_PORT
| DECODE_ENABLE_KBC_PORT | DECODE_ENABLE_ACPIUC_PORT
| DECODE_ENABLE_ADLIB_PORT;
/* Decode SIOs at 2E/2F and 4E/4F */
if (CONFIG(STONEYRIDGE_LEGACY_FREE))
tmp |= DECODE_ALTERNATE_SIO_ENABLE | DECODE_SIO_ENABLE;
lpc_enable_decode(tmp);
}
static void setup_spread_spectrum(int *reboot)
{
uint16_t rstcfg = pm_read16(PWR_RESET_CFG);
rstcfg &= ~TOGGLE_ALL_PWR_GOOD;
pm_write16(PWR_RESET_CFG, rstcfg);
uint32_t cntl1 = misc_read32(MISC_CLK_CNTL1);
if (cntl1 & CG1PLL_FBDIV_TEST) {
printk(BIOS_DEBUG, "Spread spectrum is ready\n");
misc_write32(MISC_CGPLL_CONFIG1,
misc_read32(MISC_CGPLL_CONFIG1) |
CG1PLL_SPREAD_SPECTRUM_ENABLE);
return;
}
printk(BIOS_DEBUG, "Setting up spread spectrum\n");
uint32_t cfg6 = misc_read32(MISC_CGPLL_CONFIG6);
cfg6 &= ~CG1PLL_LF_MODE_MASK;
cfg6 |= (0x0f8 << CG1PLL_LF_MODE_SHIFT) & CG1PLL_LF_MODE_MASK;
misc_write32(MISC_CGPLL_CONFIG6, cfg6);
uint32_t cfg3 = misc_read32(MISC_CGPLL_CONFIG3);
cfg3 &= ~CG1PLL_REFDIV_MASK;
cfg3 |= (0x003 << CG1PLL_REFDIV_SHIFT) & CG1PLL_REFDIV_MASK;
cfg3 &= ~CG1PLL_FBDIV_MASK;
cfg3 |= (0x04b << CG1PLL_FBDIV_SHIFT) & CG1PLL_FBDIV_MASK;
misc_write32(MISC_CGPLL_CONFIG3, cfg3);
uint32_t cfg5 = misc_read32(MISC_CGPLL_CONFIG5);
cfg5 &= ~SS_AMOUNT_NFRAC_SLIP_MASK;
cfg5 |= (0x2 << SS_AMOUNT_NFRAC_SLIP_SHIFT) & SS_AMOUNT_NFRAC_SLIP_MASK;
misc_write32(MISC_CGPLL_CONFIG5, cfg5);
uint32_t cfg4 = misc_read32(MISC_CGPLL_CONFIG4);
cfg4 &= ~SS_AMOUNT_DSFRAC_MASK;
cfg4 |= (0xd000 << SS_AMOUNT_DSFRAC_SHIFT) & SS_AMOUNT_DSFRAC_MASK;
cfg4 &= ~SS_STEP_SIZE_DSFRAC_MASK;
cfg4 |= (0x02d5 << SS_STEP_SIZE_DSFRAC_SHIFT)
& SS_STEP_SIZE_DSFRAC_MASK;
misc_write32(MISC_CGPLL_CONFIG4, cfg4);
rstcfg |= TOGGLE_ALL_PWR_GOOD;
pm_write16(PWR_RESET_CFG, rstcfg);
cntl1 |= CG1PLL_FBDIV_TEST;
misc_write32(MISC_CLK_CNTL1, cntl1);
*reboot = 1;
}
static void setup_misc(int *reboot)
{
/* Undocumented register */
uint32_t reg = misc_read32(0x50);
if (!(reg & BIT(16))) {
reg |= BIT(16);
misc_write32(0x50, reg);
*reboot = 1;
}
}
static void reset_i2c_peripherals(void)
{
const struct soc_amd_stoneyridge_config *cfg = config_of_soc();
struct soc_i2c_peripheral_reset_info reset_info;
reset_info.i2c_scl_reset_mask = cfg->i2c_scl_reset & GPIO_I2C_MASK;
reset_info.i2c_scl = i2c_scl_pins;
reset_info.num_pins = ARRAY_SIZE(i2c_scl_pins);
sb_reset_i2c_peripherals(&reset_info);
}
/* Before console init */
void bootblock_fch_early_init(void)
{
int reboot = 0;
/* Enable_acpimmio_decode_pm04 to enable the ACPIMMIO decode which is needed to access
the GPIO registers. */
enable_acpimmio_decode_pm04();
lpc_enable_rom();
lpc_early_init();
lpc_enable_port80();
sb_lpc_decode();
fch_spi_early_init();
fch_smbus_init();
fch_enable_cf9_io();
setup_spread_spectrum(&reboot);
setup_misc(&reboot);
if (reboot)
warm_reset();
fch_enable_legacy_io();
enable_aoac_devices();
/* disable the keyboard reset function before mainboard GPIO setup */
if (CONFIG(DISABLE_KEYBOARD_RESET_PIN))
fch_disable_kb_rst();
}
/* After console init */
void bootblock_fch_init(void)
{
/*
* This call (sb_reset_i2c_peripherals) was originally early at
* bootblock_c_entry, but had to be moved here. There was an
* unexplained delay in the middle of the i2c transaction when
* we had it in bootblock_c_entry. Moving it to this point
* (or adding delays) fixes the issue. It seems like the processor
* just pauses but we don't know why.
*/
reset_i2c_peripherals();
pm_set_power_failure_state();
fch_print_pmxc0_status();
/* Initialize any early i2c buses. */
i2c_soc_early_init();
show_spi_speeds_and_modes();
}
void fch_clk_output_48Mhz(u32 osc)
{
u32 ctrl;
/*
* Clear the disable for OSCOUT1 (signal typically named XnnM_25M_48M)
* or OSCOUT2 (USBCLK/25M_48M_OSC). The frequency defaults to 48MHz.
*/
ctrl = misc_read32(MISC_CLK_CNTL1);
switch (osc) {
case 1:
ctrl &= ~OSCOUT1_CLK_OUTPUT_ENB;
break;
case 2:
ctrl &= ~OSCOUT2_CLK_OUTPUT_ENB;
break;
default:
return; /* do nothing if invalid */
}
misc_write32(MISC_CLK_CNTL1, ctrl);
}
|
