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soc/amd/picasso: Refactor AOAC enabling 

Replace the raw register definitions with device numbers and macros
for determining the register offsets.  Rewrite the source to refer
to AOAC device numbers instead of a structure.

Remove the calculated offset for the console UART.  Picasso's UARTs
are not contiguous so handle them separately.

Change-Id: Iffc87f39ebe38394a56d41bb0940e9701fd05db9
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35296
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
This commit is contained in:
Marshall Dawson 2019-09-06 12:19:00 -06:00
parent 59674c984e
commit 09d50671e6
2 changed files with 57 additions and 41 deletions
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34
src/soc/amd/picasso/include/soc/southbridge.h
View File

@ -206,14 +206,18 @@
#define I2C_PAD_CTRL_SPARE1 BIT(18)
/* FCH AOAC Registers 0xfed81e00 */
#define FCH_AOAC_D3_CONTROL_CLK_GEN 0x40
#define FCH_AOAC_D3_CONTROL_I2C2 0x4e
#define FCH_AOAC_D3_CONTROL_I2C3 0x50
#define FCH_AOAC_D3_CONTROL_I2C4 0x52
#define FCH_AOAC_D3_CONTROL_UART0 0x56
#define FCH_AOAC_D3_CONTROL_UART1 0x58
#define FCH_AOAC_D3_CONTROL_AMBA 0x62
/* Bit definitions for all FCH_AOAC_D3_CONTROL_* Registers */
#define AOAC_DEV_D3_CTL(device) (0x40 + device * 2)
#define AOAC_DEV_D3_STATE(device) (AOAC_DEV_D3_CTL(device) + 1)
#define FCH_AOAC_DEV_CLK_GEN 0
#define FCH_AOAC_DEV_I2C2 7
#define FCH_AOAC_DEV_I2C3 8
#define FCH_AOAC_DEV_I2C4 9
#define FCH_AOAC_DEV_UART0 11
#define FCH_AOAC_DEV_UART1 12
#define FCH_AOAC_DEV_AMBA 17
/* Bit definitions for Device D3 Control AOACx0000[40...7E] step 2 */
#define FCH_AOAC_TARGET_DEVICE_STATE (BIT(0) + BIT(1))
#define FCH_AOAC_DEVICE_STATE BIT(2)
#define FCH_AOAC_PWR_ON_DEV BIT(3)
@ -222,14 +226,7 @@
#define FCH_AOAC_SW_RST_B BIT(6)
#define FCH_AOAC_IS_SW_CONTROL BIT(7)
#define FCH_AOAC_D3_STATE_CLK_GEN 0x41
#define FCH_AOAC_D3_STATE_I2C2 0x4f
#define FCH_AOAC_D3_STATE_I2C3 0x51
#define FCH_AOAC_D3_STATE_I2C4 0x53
#define FCH_AOAC_D3_STATE_UART0 0x57
#define FCH_AOAC_D3_STATE_UART1 0x59
#define FCH_AOAC_D3_STATE_AMBA 0x63
/* Bit definitions for all FCH_AOAC_D3_STATE_* Registers */
/* Bit definitions for Device D3 State AOACx0000[41...7f] step 2 */
#define FCH_AOAC_PWR_RST_STATE BIT(0)
#define FCH_AOAC_RST_CLK_OK_STATE BIT(1)
#define FCH_AOAC_RST_B_STATE BIT(2)
@ -307,11 +304,6 @@
/* IO 0xf0 NCP Error */
#define NCP_WARM_BOOT BIT(7) /* Write-once */
struct picasso_aoac {
int enable;
int status;
};
typedef struct aoac_devs {
unsigned int :7;
unsigned int ic2e:1; /* 7: I2C2 */

64
src/soc/amd/picasso/southbridge.c
View File

@ -36,19 +36,25 @@
#include <soc/nvs.h>
#include <types.h>
#define FCH_AOAC_UART_FOR_CONSOLE \
(CONFIG_UART_FOR_CONSOLE == 0 ? FCH_AOAC_DEV_UART0 \
: CONFIG_UART_FOR_CONSOLE == 1 ? FCH_AOAC_DEV_UART1 \
: -1)
#if FCH_AOAC_UART_FOR_CONSOLE == -1
# error Unsupported UART_FOR_CONSOLE chosen
#endif
/*
* Table of devices that need their AOAC registers enabled and waited
* upon (usually about .55 milliseconds). Instead of individual delays
* waiting for each device to become available, a single delay will be
* executed.
* executed. The console UART is handled separately from this table.
*/
const static struct picasso_aoac aoac_devs[] = {
{ (FCH_AOAC_D3_CONTROL_UART0 + CONFIG_UART_FOR_CONSOLE * 2),
(FCH_AOAC_D3_STATE_UART0 + CONFIG_UART_FOR_CONSOLE * 2) },
{ FCH_AOAC_D3_CONTROL_AMBA, FCH_AOAC_D3_STATE_AMBA },
{ FCH_AOAC_D3_CONTROL_I2C2, FCH_AOAC_D3_STATE_I2C2 },
{ FCH_AOAC_D3_CONTROL_I2C3, FCH_AOAC_D3_STATE_I2C3 },
{ FCH_AOAC_D3_CONTROL_I2C4, FCH_AOAC_D3_STATE_I2C4 }
const static int aoac_devs[] = {
FCH_AOAC_DEV_AMBA,
FCH_AOAC_DEV_I2C2,
FCH_AOAC_DEV_I2C3,
FCH_AOAC_DEV_I2C4,
};
/*
@ -101,21 +107,21 @@ const struct irq_idx_name *sb_get_apic_reg_association(size_t *size)
return irq_association;
}
static void power_on_aoac_device(int aoac_device_control_register)
static void power_on_aoac_device(int dev)
{
uint8_t byte;
/* Power on the UART and AMBA devices */
byte = aoac_read8(aoac_device_control_register);
byte = aoac_read8(AOAC_DEV_D3_CTL(dev));
byte |= FCH_AOAC_PWR_ON_DEV;
aoac_write8(aoac_device_control_register, byte);
aoac_write8(AOAC_DEV_D3_CTL(dev), byte);
}
static bool is_aoac_device_enabled(int aoac_device_status_register)
static bool is_aoac_device_enabled(int dev)
{
uint8_t byte;
byte = aoac_read8(aoac_device_status_register);
byte = aoac_read8(AOAC_DEV_D3_STATE(dev));
byte &= (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE);
if (byte == (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE))
return true;
@ -123,20 +129,38 @@ static bool is_aoac_device_enabled(int aoac_device_status_register)
return false;
}
static void enable_aoac_console_uart(void)
{
if (!CONFIG(PICASSO_UART))
return;
power_on_aoac_device(FCH_AOAC_UART_FOR_CONSOLE);
}
static bool is_aoac_console_uart_enabled(void)
{
if (!CONFIG(PICASSO_UART))
return true;
return is_aoac_device_enabled(FCH_AOAC_UART_FOR_CONSOLE);
}
void enable_aoac_devices(void)
{
bool status;
int i;
for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
power_on_aoac_device(aoac_devs[i].enable);
power_on_aoac_device(aoac_devs[i]);
enable_aoac_console_uart();
/* Wait for AOAC devices to indicate power and clock OK */
do {
udelay(100);
status = true;
for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
status &= is_aoac_device_enabled(aoac_devs[i].status);
status &= is_aoac_device_enabled(aoac_devs[i]);
status &= is_aoac_console_uart_enabled();
} while (!status);
}
@ -513,11 +537,11 @@ static void set_sb_final_nvs(void)
if (gnvs == NULL)
return;
gnvs->aoac.ic2e = is_aoac_device_enabled(FCH_AOAC_D3_STATE_I2C2);
gnvs->aoac.ic3e = is_aoac_device_enabled(FCH_AOAC_D3_STATE_I2C3);
gnvs->aoac.ic4e = is_aoac_device_enabled(FCH_AOAC_D3_STATE_I2C4);
gnvs->aoac.ut0e = is_aoac_device_enabled(FCH_AOAC_D3_STATE_UART0);
gnvs->aoac.ut1e = is_aoac_device_enabled(FCH_AOAC_D3_STATE_UART1);
gnvs->aoac.ic2e = is_aoac_device_enabled(FCH_AOAC_DEV_I2C2);
gnvs->aoac.ic3e = is_aoac_device_enabled(FCH_AOAC_DEV_I2C3);
gnvs->aoac.ic4e = is_aoac_device_enabled(FCH_AOAC_DEV_I2C4);
gnvs->aoac.ut0e = is_aoac_device_enabled(FCH_AOAC_DEV_UART0);
gnvs->aoac.ut1e = is_aoac_device_enabled(FCH_AOAC_DEV_UART1);
/* Rely on these being in sync with devicetree */
sata = pcidev_path_on_root(SATA_DEVFN);
gnvs->aoac.st_e = sata && sata->enabled ? 1 : 0;