summaryrefslogtreecommitdiffstats
path: root/arch/tile/gxio
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/gxio')
-rw-r--r--arch/tile/gxio/Kconfig5
-rw-r--r--arch/tile/gxio/Makefile1
-rw-r--r--arch/tile/gxio/iorpc_trio.c23
-rw-r--r--arch/tile/gxio/iorpc_uart.c77
-rw-r--r--arch/tile/gxio/uart.c87
5 files changed, 193 insertions, 0 deletions
diff --git a/arch/tile/gxio/Kconfig b/arch/tile/gxio/Kconfig
index d221f8d6de8..d4e10d58071 100644
--- a/arch/tile/gxio/Kconfig
+++ b/arch/tile/gxio/Kconfig
@@ -26,3 +26,8 @@ config TILE_GXIO_TRIO
config TILE_GXIO_USB_HOST
bool
select TILE_GXIO
+
+# Support direct access to the TILE-Gx UART hardware from kernel space.
+config TILE_GXIO_UART
+ bool
+ select TILE_GXIO
diff --git a/arch/tile/gxio/Makefile b/arch/tile/gxio/Makefile
index 8684bcaa74e..26ae2c72746 100644
--- a/arch/tile/gxio/Makefile
+++ b/arch/tile/gxio/Makefile
@@ -6,4 +6,5 @@ obj-$(CONFIG_TILE_GXIO) += iorpc_globals.o kiorpc.o
obj-$(CONFIG_TILE_GXIO_DMA) += dma_queue.o
obj-$(CONFIG_TILE_GXIO_MPIPE) += mpipe.o iorpc_mpipe.o iorpc_mpipe_info.o
obj-$(CONFIG_TILE_GXIO_TRIO) += trio.o iorpc_trio.o
+obj-$(CONFIG_TILE_GXIO_UART) += uart.o iorpc_uart.o
obj-$(CONFIG_TILE_GXIO_USB_HOST) += usb_host.o iorpc_usb_host.o
diff --git a/arch/tile/gxio/iorpc_trio.c b/arch/tile/gxio/iorpc_trio.c
index cef4b2209cd..da6e18e049c 100644
--- a/arch/tile/gxio/iorpc_trio.c
+++ b/arch/tile/gxio/iorpc_trio.c
@@ -61,6 +61,29 @@ int gxio_trio_alloc_memory_maps(gxio_trio_context_t * context,
EXPORT_SYMBOL(gxio_trio_alloc_memory_maps);
+struct alloc_scatter_queues_param {
+ unsigned int count;
+ unsigned int first;
+ unsigned int flags;
+};
+
+int gxio_trio_alloc_scatter_queues(gxio_trio_context_t * context,
+ unsigned int count, unsigned int first,
+ unsigned int flags)
+{
+ struct alloc_scatter_queues_param temp;
+ struct alloc_scatter_queues_param *params = &temp;
+
+ params->count = count;
+ params->first = first;
+ params->flags = flags;
+
+ return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+ sizeof(*params),
+ GXIO_TRIO_OP_ALLOC_SCATTER_QUEUES);
+}
+
+EXPORT_SYMBOL(gxio_trio_alloc_scatter_queues);
struct alloc_pio_regions_param {
unsigned int count;
diff --git a/arch/tile/gxio/iorpc_uart.c b/arch/tile/gxio/iorpc_uart.c
new file mode 100644
index 00000000000..b9a6d6193d7
--- /dev/null
+++ b/arch/tile/gxio/iorpc_uart.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2013 Tilera Corporation. All Rights Reserved.
+ *
+ * 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.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+/* This file is machine-generated; DO NOT EDIT! */
+#include "gxio/iorpc_uart.h"
+
+struct cfg_interrupt_param {
+ union iorpc_interrupt interrupt;
+};
+
+int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, int inter_x,
+ int inter_y, int inter_ipi, int inter_event)
+{
+ struct cfg_interrupt_param temp;
+ struct cfg_interrupt_param *params = &temp;
+
+ params->interrupt.kernel.x = inter_x;
+ params->interrupt.kernel.y = inter_y;
+ params->interrupt.kernel.ipi = inter_ipi;
+ params->interrupt.kernel.event = inter_event;
+
+ return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+ sizeof(*params), GXIO_UART_OP_CFG_INTERRUPT);
+}
+
+EXPORT_SYMBOL(gxio_uart_cfg_interrupt);
+
+struct get_mmio_base_param {
+ HV_PTE base;
+};
+
+int gxio_uart_get_mmio_base(gxio_uart_context_t *context, HV_PTE *base)
+{
+ int __result;
+ struct get_mmio_base_param temp;
+ struct get_mmio_base_param *params = &temp;
+
+ __result =
+ hv_dev_pread(context->fd, 0, (HV_VirtAddr) params, sizeof(*params),
+ GXIO_UART_OP_GET_MMIO_BASE);
+ *base = params->base;
+
+ return __result;
+}
+
+EXPORT_SYMBOL(gxio_uart_get_mmio_base);
+
+struct check_mmio_offset_param {
+ unsigned long offset;
+ unsigned long size;
+};
+
+int gxio_uart_check_mmio_offset(gxio_uart_context_t *context,
+ unsigned long offset, unsigned long size)
+{
+ struct check_mmio_offset_param temp;
+ struct check_mmio_offset_param *params = &temp;
+
+ params->offset = offset;
+ params->size = size;
+
+ return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+ sizeof(*params), GXIO_UART_OP_CHECK_MMIO_OFFSET);
+}
+
+EXPORT_SYMBOL(gxio_uart_check_mmio_offset);
diff --git a/arch/tile/gxio/uart.c b/arch/tile/gxio/uart.c
new file mode 100644
index 00000000000..ba585175ef8
--- /dev/null
+++ b/arch/tile/gxio/uart.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2013 Tilera Corporation. All Rights Reserved.
+ *
+ * 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.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+/*
+ * Implementation of UART gxio calls.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+
+#include <gxio/uart.h>
+#include <gxio/iorpc_globals.h>
+#include <gxio/iorpc_uart.h>
+#include <gxio/kiorpc.h>
+
+int gxio_uart_init(gxio_uart_context_t *context, int uart_index)
+{
+ char file[32];
+ int fd;
+
+ snprintf(file, sizeof(file), "uart/%d/iorpc", uart_index);
+ fd = hv_dev_open((HV_VirtAddr) file, 0);
+ if (fd < 0) {
+ if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
+ return fd;
+ else
+ return -ENODEV;
+ }
+
+ context->fd = fd;
+
+ /* Map in the MMIO space. */
+ context->mmio_base = (void __force *)
+ iorpc_ioremap(fd, HV_UART_MMIO_OFFSET, HV_UART_MMIO_SIZE);
+
+ if (context->mmio_base == NULL) {
+ hv_dev_close(context->fd);
+ context->fd = -1;
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(gxio_uart_init);
+
+int gxio_uart_destroy(gxio_uart_context_t *context)
+{
+ iounmap((void __force __iomem *)(context->mmio_base));
+ hv_dev_close(context->fd);
+
+ context->mmio_base = NULL;
+ context->fd = -1;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(gxio_uart_destroy);
+
+/* UART register write wrapper. */
+void gxio_uart_write(gxio_uart_context_t *context, uint64_t offset,
+ uint64_t word)
+{
+ __gxio_mmio_write(context->mmio_base + offset, word);
+}
+
+EXPORT_SYMBOL_GPL(gxio_uart_write);
+
+/* UART register read wrapper. */
+uint64_t gxio_uart_read(gxio_uart_context_t *context, uint64_t offset)
+{
+ return __gxio_mmio_read(context->mmio_base + offset);
+}
+
+EXPORT_SYMBOL_GPL(gxio_uart_read);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 15:52:23 +0000