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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <cbmem.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <soc/iobp.h>
#include <soc/nvs.h>
#include <soc/pci_devs.h>
#include <soc/pch.h>
#include <soc/ramstage.h>
#include <soc/rcba.h>
#include <soc/serialio.h>
#include <soc/intel/broadwell/chip.h>
/* Set D3Hot Power State in ACPI mode */
static void serialio_enable_d3hot(struct resource *res)
{
u32 reg32 = read32(res2mmio(res, PCH_PCS, 0));
reg32 |= PCH_PCS_PS_D3HOT;
write32(res2mmio(res, PCH_PCS, 0), reg32);
}
static int serialio_uart_is_debug(struct device *dev)
{
#if CONFIG(INTEL_PCH_UART_CONSOLE)
switch (dev->path.pci.devfn) {
case PCH_DEVFN_UART0: /* UART0 */
return !!(CONFIG_INTEL_PCH_UART_CONSOLE_NUMBER == 0);
case PCH_DEVFN_UART1: /* UART1 */
return !!(CONFIG_INTEL_PCH_UART_CONSOLE_NUMBER == 1);
}
#endif
return 0;
}
/* Enable clock in PCI mode */
static void serialio_enable_clock(struct resource *bar0)
{
u32 reg32 = read32(res2mmio(bar0, SIO_REG_PPR_CLOCK, 0));
reg32 |= SIO_REG_PPR_CLOCK_EN;
write32(res2mmio(bar0, SIO_REG_PPR_CLOCK, 0), reg32);
}
/* Put Serial IO D21:F0-F6 device into desired mode. */
static void serialio_d21_mode(int sio_index, int int_pin, int acpi_mode)
{
u32 portctrl = SIO_IOBP_PORTCTRL_PM_CAP_PRSNT;
/* Snoop select 1. */
portctrl |= SIO_IOBP_PORTCTRL_SNOOP_SELECT(1);
/* Set interrupt pin. */
portctrl |= SIO_IOBP_PORTCTRL_INT_PIN(int_pin);
if (acpi_mode) {
/* Enable ACPI interrupt mode. */
portctrl |= SIO_IOBP_PORTCTRL_ACPI_IRQ_EN;
/* Disable PCI config space. */
portctrl |= SIO_IOBP_PORTCTRL_PCI_CONF_DIS;
}
pch_iobp_update(SIO_IOBP_PORTCTRLX(sio_index), 0, portctrl);
}
/* Put Serial IO D23:F0 device into desired mode. */
static void serialio_d23_mode(int acpi_mode)
{
u32 portctrl = 0;
/* Snoop select 1. */
pch_iobp_update(SIO_IOBP_PORTCTRL1, 0,
SIO_IOBP_PORTCTRL1_SNOOP_SELECT(1));
if (acpi_mode) {
/* Enable ACPI interrupt mode. */
portctrl |= SIO_IOBP_PORTCTRL0_ACPI_IRQ_EN;
/* Disable PCI config space. */
portctrl |= SIO_IOBP_PORTCTRL0_PCI_CONF_DIS;
}
pch_iobp_update(SIO_IOBP_PORTCTRL0, 0, portctrl);
}
/* Enable LTR Auto Mode for D21:F1-F6. */
static void serialio_d21_ltr(struct resource *bar0)
{
u32 reg;
/* 1. Program BAR0 + 808h[2] = 0b */
reg = read32(res2mmio(bar0, SIO_REG_PPR_GEN, 0));
reg &= ~SIO_REG_PPR_GEN_LTR_MODE_MASK;
write32(res2mmio(bar0, SIO_REG_PPR_GEN, 0), reg);
/* 2. Program BAR0 + 804h[1:0] = 00b */
reg = read32(res2mmio(bar0, SIO_REG_PPR_RST, 0));
reg &= ~SIO_REG_PPR_RST_ASSERT;
write32(res2mmio(bar0, SIO_REG_PPR_RST, 0), reg);
/* 3. Program BAR0 + 804h[1:0] = 11b */
reg = read32(res2mmio(bar0, SIO_REG_PPR_RST, 0));
reg |= SIO_REG_PPR_RST_ASSERT;
write32(res2mmio(bar0, SIO_REG_PPR_RST, 0), reg);
/* 4. Program BAR0 + 814h[31:0] = 00000000h */
write32(res2mmio(bar0, SIO_REG_AUTO_LTR, 0), 0);
}
/* Enable LTR Auto Mode for D23:F0. */
static void serialio_d23_ltr(struct resource *bar0)
{
u32 reg;
/* Program BAR0 + 1008h[2] = 1b */
reg = read32(res2mmio(bar0, SIO_REG_SDIO_PPR_GEN, 0));
reg |= SIO_REG_PPR_GEN_LTR_MODE_MASK;
write32(res2mmio(bar0, SIO_REG_SDIO_PPR_GEN, 0), reg);
/* Program BAR0 + 1010h = 0x00000000 */
write32(res2mmio(bar0, SIO_REG_SDIO_PPR_SW_LTR, 0), 0);
/* Program BAR0 + 3Ch[30] = 1b */
reg = read32(res2mmio(bar0, SIO_REG_SDIO_PPR_CMD12, 0));
reg |= SIO_REG_SDIO_PPR_CMD12_B30;
write32(res2mmio(bar0, SIO_REG_SDIO_PPR_CMD12, 0), reg);
}
/* Select I2C voltage of 1.8V or 3.3V. */
static void serialio_i2c_voltage_sel(struct resource *bar0, u8 voltage)
{
u32 reg32 = read32(res2mmio(bar0, SIO_REG_PPR_GEN, 0));
reg32 &= ~SIO_REG_PPR_GEN_VOLTAGE_MASK;
reg32 |= SIO_REG_PPR_GEN_VOLTAGE(voltage);
write32(res2mmio(bar0, SIO_REG_PPR_GEN, 0), reg32);
}
/* Init sequence to be run once, done as part of D21:F0 (SDMA) init. */
static void serialio_init_once(int acpi_mode)
{
if (acpi_mode) {
/* Enable ACPI IRQ for IRQ13, IRQ7, IRQ6, IRQ5 in RCBA. */
RCBA32_OR(ACPIIRQEN, (1 << 13)|(1 << 7)|(1 << 6)|(1 << 5));
}
/* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b. */
pch_iobp_update(SIO_IOBP_GPIODF, ~0x0000131f, 0x0000131f);
/* Program IOBP CB000180h[5:0] = 111111b (undefined register) */
pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f);
}
static void serialio_init(struct device *dev)
{
config_t *config = config_of(dev);
struct resource *bar0, *bar1;
int sio_index = -1;
printk(BIOS_DEBUG, "Initializing Serial IO device\n");
/* Ensure memory and bus master are enabled */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Find BAR0 and BAR1 */
bar0 = find_resource(dev, PCI_BASE_ADDRESS_0);
if (!bar0)
return;
bar1 = find_resource(dev, PCI_BASE_ADDRESS_1);
if (!bar1)
return;
if (!config->sio_acpi_mode)
serialio_enable_clock(bar0);
switch (dev->path.pci.devfn) {
case PCH_DEVFN_SDMA: /* SDMA */
sio_index = SIO_ID_SDMA;
serialio_init_once(config->sio_acpi_mode);
serialio_d21_mode(sio_index, SIO_PIN_INTB,
config->sio_acpi_mode);
break;
case PCH_DEVFN_I2C0: /* I2C0 */
sio_index = SIO_ID_I2C0;
serialio_d21_ltr(bar0);
serialio_i2c_voltage_sel(bar0, config->sio_i2c0_voltage);
serialio_d21_mode(sio_index, SIO_PIN_INTC,
config->sio_acpi_mode);
break;
case PCH_DEVFN_I2C1: /* I2C1 */
sio_index = SIO_ID_I2C1;
serialio_d21_ltr(bar0);
serialio_i2c_voltage_sel(bar0, config->sio_i2c1_voltage);
serialio_d21_mode(sio_index, SIO_PIN_INTC,
config->sio_acpi_mode);
break;
case PCH_DEVFN_SPI0: /* SPI0 */
sio_index = SIO_ID_SPI0;
serialio_d21_ltr(bar0);
serialio_d21_mode(sio_index, SIO_PIN_INTC,
config->sio_acpi_mode);
break;
case PCH_DEVFN_SPI1: /* SPI1 */
sio_index = SIO_ID_SPI1;
serialio_d21_ltr(bar0);
serialio_d21_mode(sio_index, SIO_PIN_INTC,
config->sio_acpi_mode);
break;
case PCH_DEVFN_UART0: /* UART0 */
sio_index = SIO_ID_UART0;
if (!serialio_uart_is_debug(dev))
serialio_d21_ltr(bar0);
serialio_d21_mode(sio_index, SIO_PIN_INTD,
config->sio_acpi_mode);
break;
case PCH_DEVFN_UART1: /* UART1 */
sio_index = SIO_ID_UART1;
if (!serialio_uart_is_debug(dev))
serialio_d21_ltr(bar0);
serialio_d21_mode(sio_index, SIO_PIN_INTD,
config->sio_acpi_mode);
break;
case PCH_DEVFN_SDIO: /* SDIO */
sio_index = SIO_ID_SDIO;
serialio_d23_ltr(bar0);
serialio_d23_mode(config->sio_acpi_mode);
break;
default:
return;
}
if (config->sio_acpi_mode) {
global_nvs_t *gnvs;
/* Find ACPI NVS to update BARs */
gnvs = (global_nvs_t *)cbmem_find(CBMEM_ID_ACPI_GNVS);
if (!gnvs) {
printk(BIOS_ERR, "Unable to locate Global NVS\n");
return;
}
/* Save BAR0 and BAR1 to ACPI NVS */
gnvs->dev.bar0[sio_index] = (u32)bar0->base;
gnvs->dev.bar1[sio_index] = (u32)bar1->base;
/* Do not enable UART if it is used as debug port */
if (!serialio_uart_is_debug(dev))
gnvs->dev.enable[sio_index] = 1;
/* Put device in D3hot state via BAR1 */
if (dev->path.pci.devfn != PCH_DEVFN_SDMA)
serialio_enable_d3hot(bar1); /* all but SDMA */
}
}
static void serialio_set_resources(struct device *dev)
{
pci_dev_set_resources(dev);
#if CONFIG(INTEL_PCH_UART_CONSOLE)
/* Update UART base address if used for debug */
if (serialio_uart_is_debug(dev)) {
struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0);
if (res)
uartmem_setbaseaddr(res->base);
}
#endif
}
static struct device_operations device_ops = {
.read_resources = &pci_dev_read_resources,
.set_resources = &serialio_set_resources,
.enable_resources = &pci_dev_enable_resources,
.init = &serialio_init,
.ops_pci = &broadwell_pci_ops,
};
static const unsigned short pci_device_ids[] = {
0x9c60, 0x9ce0, /* 0:15.0 - SDMA */
0x9c61, 0x9ce1, /* 0:15.1 - I2C0 */
0x9c62, 0x9ce2, /* 0:15.2 - I2C1 */
0x9c65, 0x9ce5, /* 0:15.3 - SPI0 */
0x9c66, 0x9ce6, /* 0:15.4 - SPI1 */
0x9c63, 0x9ce3, /* 0:15.5 - UART0 */
0x9c64, 0x9ce4, /* 0:15.6 - UART1 */
0x9c35, 0x9cb5, /* 0:17.0 - SDIO */
0
};
static const struct pci_driver pch_pcie __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
|
