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soc/amd/cezanne/uart: separate data and code 

The goal of this is to be able to move most of the code over to the
common AMD blocks.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I0e585370a0de56787340788acfecc7931820566d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68527
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
This commit is contained in:
Felix Held 2022-10-18 18:23:28 +02:00
parent 6c6c35f20c
commit d85f25fbb9
1 changed files with 33 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/soc/amd/cezanne/uart.c
View File

@ -15,16 +15,18 @@
static const struct {
uintptr_t base;
unsigned int aoac_device;
const char *acpi_name;
struct soc_amd_gpio mux[2];
} uart_info[] = {
[0] = { APU_UART0_BASE, {
[0] = { APU_UART0_BASE, FCH_AOAC_DEV_UART0, "FUR0", {
PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
} },
[1] = { APU_UART1_BASE, {
} },
[1] = { APU_UART1_BASE, FCH_AOAC_DEV_UART1, "FUR1", {
PAD_NF(GPIO_140, UART1_TXD, PULL_NONE),
PAD_NF(GPIO_142, UART1_RXD, PULL_NONE),
} },
} },
};
uintptr_t get_uart_base(unsigned int idx)
@ -35,6 +37,28 @@ uintptr_t get_uart_base(unsigned int idx)
return uart_info[idx].base;
}
static enum cb_err get_uart_idx(uintptr_t base, unsigned int *idx)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(uart_info); i++) {
if (base == uart_info[i].base) {
*idx = i;
return CB_SUCCESS;
}
}
return CB_ERR;
}
static enum cb_err get_uart_aoac_device(uintptr_t base, unsigned int *aoac_dev)
{
unsigned int idx;
if (get_uart_idx(base, &idx) == CB_ERR)
return CB_ERR;
*aoac_dev = uart_info[idx].aoac_device;
return CB_SUCCESS;
}
void clear_uart_legacy_config(void)
{
write16p(FCH_LEGACY_UART_DECODE, 0);
@ -50,14 +74,11 @@ void set_uart_config(unsigned int idx)
static const char *uart_acpi_name(const struct device *dev)
{
switch (dev->path.mmio.addr) {
case APU_UART0_BASE:
return "FUR0";
case APU_UART1_BASE:
return "FUR1";
default:
unsigned int idx;
if (get_uart_idx(dev->path.mmio.addr, &idx) == CB_SUCCESS)
return uart_info[idx].acpi_name;
else
return NULL;
}
}
/* Even though this is called enable, it gets called for both enabled and disabled devices. */
@ -65,14 +86,7 @@ static void uart_enable(struct device *dev)
{
unsigned int dev_id;
switch (dev->path.mmio.addr) {
case APU_UART0_BASE:
dev_id = FCH_AOAC_DEV_UART0;
break;
case APU_UART1_BASE:
dev_id = FCH_AOAC_DEV_UART1;
break;
default:
if (get_uart_aoac_device(dev->path.mmio.addr, &dev_id) == CB_ERR) {
printk(BIOS_ERR, "%s: Unknown device: %s\n", __func__, dev_path(dev));
return;
}