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Diffstat (limited to 'src/ec/kontron/kempld/kempld.c')
-rw-r--r--src/ec/kontron/kempld/kempld.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/src/ec/kontron/kempld/kempld.c b/src/ec/kontron/kempld/kempld.c
new file mode 100644
index 0000000000..19c18804c2
--- /dev/null
+++ b/src/ec/kontron/kempld/kempld.c
@@ -0,0 +1,115 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 secunet Security Networks AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+
+#include "chip.h"
+#include "kempld.h"
+#include "kempld_internal.h"
+
+static void kempld_uart_read_resources(struct device *dev)
+{
+ static const unsigned int io_addr[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
+
+ const struct ec_kontron_kempld_config *const config = dev->chip_info;
+
+ struct resource *const res_io = new_resource(dev, 0);
+ struct resource *const res_irq = new_resource(dev, 1);
+ const unsigned int uart = dev->path.generic.subid;
+ if (!config || !res_io || !res_irq || uart >= KEMPLD_NUM_UARTS)
+ return;
+
+ const enum kempld_uart_io io = config->uart[uart].io;
+ if (io >= ARRAY_SIZE(io_addr)) {
+ printk(BIOS_ERR, "KEMPLD: Bad io value '%d' for UART#%u\n.",
+ io, uart);
+ dev->enabled = false;
+ return;
+ }
+
+ const int irq = config->uart[uart].irq;
+ if (irq >= 16) {
+ printk(BIOS_ERR, "KEMPLD: Bad irq value '%d' for UART#%u\n.",
+ irq, uart);
+ dev->enabled = false;
+ return;
+ }
+
+ res_io->base = io_addr[io];
+ res_io->size = 8;
+ res_io->flags = IORESOURCE_IO | IORESOURCE_FIXED |
+ IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+ res_irq->base = irq;
+ res_irq->size = 1;
+ res_irq->flags = IORESOURCE_IO | IORESOURCE_FIXED |
+ IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+
+ if (kempld_get_mutex(100) < 0)
+ return;
+
+ const uint8_t reg = uart ? KEMPLD_UART_1 : KEMPLD_UART_0;
+ const uint8_t val = kempld_read8(reg);
+ kempld_write8(reg, (val & ~(KEMPLD_UART_IO_MASK | KEMPLD_UART_IRQ_MASK))
+ | io << KEMPLD_UART_IO_SHIFT
+ | irq << KEMPLD_UART_IRQ_SHIFT);
+
+ kempld_release_mutex();
+}
+
+static void kempld_uart_enable_resources(struct device *dev)
+{
+ if (kempld_get_mutex(100) < 0)
+ return;
+
+ const unsigned int uart = dev->path.generic.subid;
+ const uint8_t reg = uart ? KEMPLD_UART_1 : KEMPLD_UART_0;
+ kempld_write8(reg, kempld_read8(reg) | KEMPLD_UART_ENABLE);
+
+ kempld_release_mutex();
+}
+
+static struct device_operations kempld_uart_ops = {
+ .read_resources = kempld_uart_read_resources,
+ .enable_resources = kempld_uart_enable_resources,
+};
+
+static void kempld_enable_dev(struct device *const dev)
+{
+ if (dev->path.type == DEVICE_PATH_GENERIC) {
+ switch (dev->path.generic.id) {
+ case 0:
+ if (dev->path.generic.subid < KEMPLD_NUM_UARTS) {
+ dev->ops = &kempld_uart_ops;
+ break;
+ }
+ case 1:
+ if (dev->path.generic.subid == 0) {
+ kempld_i2c_device_init(dev);
+ break;
+ }
+ default:
+ printk(BIOS_WARNING,
+ "KEMPLD: Spurious device %s.\n",
+ dev_path(dev));
+ break;
+ }
+ }
+}
+
+struct chip_operations ec_kontron_kempld_ops = {
+ CHIP_NAME("Kontron KEMPLD")
+ .enable_dev = kempld_enable_dev,
+};