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cmd: Add axi command

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Add a command to debug the AXI bus.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
lime2-spi
Mario Six 6 years ago committed by Anatolij Gustschin
parent 87940ec407
commit 37c4a5f6a5
3 changed files with 361 additions and 0 deletions
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  1. 8
      cmd/Kconfig
  2. 1
      cmd/Makefile
  3. 352
      cmd/axi.c

8
cmd/Kconfig
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@ -1027,6 +1027,14 @@ config CMD_USB_MASS_STORAGE
help
USB mass storage support
config CMD_AXI
bool "axi"
depends on AXI
help
Enable the command "axi" for accessing AXI (Advanced eXtensible
Interface) busses, a on-chip interconnect specification for managing
functional blocks in SoC designs, which is also often used in designs
involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
endmenu

1
cmd/Makefile
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@ -149,6 +149,7 @@ obj-$(CONFIG_CMD_ZFS) += zfs.o
obj-$(CONFIG_CMD_DFU) += dfu.o
obj-$(CONFIG_CMD_GPT) += gpt.o
obj-$(CONFIG_CMD_ETHSW) += ethsw.o
obj-$(CONFIG_CMD_AXI) += axi.o
# Power
obj-$(CONFIG_CMD_PMIC) += pmic.o

352
cmd/axi.c
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@ -0,0 +1,352 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016
* Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
*
* (C) Copyright 2017, 2018
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <axi.h>
#include <command.h>
#include <console.h>
#include <dm.h>
/* Currently selected AXI bus device */
static struct udevice *axi_cur_bus;
/* Transmission size from last command */
static uint dp_last_size;
/* Address from last command */
static uint dp_last_addr;
/* Number of bytes to display from last command; default = 64 */
static uint dp_last_length = 0x40;
/**
* show_bus() - Show devices on a single AXI bus
* @bus: The AXI bus device to printt information for
*/
static void show_bus(struct udevice *bus)
{
struct udevice *dev;
printf("Bus %d:\t%s", bus->req_seq, bus->name);
if (device_active(bus))
printf(" (active %d)", bus->seq);
printf("\n");
for (device_find_first_child(bus, &dev);
dev;
device_find_next_child(&dev))
printf(" %s\n", dev->name);
}
/**
* axi_set_cur_bus() - Set the currently active AXI bus
* @busnum: The number of the bus (i.e. its sequence number) that should be
* made active
*
* The operations supplied by this command operate only on the currently active
* bus.
*
* Return: 0 if OK, -ve on error
*/
static int axi_set_cur_bus(unsigned int busnum)
{
struct udevice *bus;
struct udevice *dummy;
int ret;
/* Make sure that all sequence numbers are initialized */
for (uclass_first_device(UCLASS_AXI, &dummy);
dummy;
uclass_next_device(&dummy))
;
ret = uclass_get_device_by_seq(UCLASS_AXI, busnum, &bus);
if (ret) {
debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
axi_cur_bus = bus;
return 0;
}
/**
* axi_get_cur_bus() - Retrieve the currently active AXI bus device
* @busp: Pointer to a struct udevice that receives the currently active bus
* device
*
* Return: 0 if OK, -ve on error
*/
static int axi_get_cur_bus(struct udevice **busp)
{
if (!axi_cur_bus) {
puts("No AXI bus selected\n");
return -ENODEV;
}
*busp = axi_cur_bus;
return 0;
}
/*
* Command handlers
*/
static int do_axi_show_bus(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
struct udevice *dummy;
/* Make sure that all sequence numbers are initialized */
for (uclass_first_device(UCLASS_AXI, &dummy);
dummy;
uclass_next_device(&dummy))
;
if (argc == 1) {
/* show all busses */
struct udevice *bus;
for (uclass_first_device(UCLASS_AXI, &bus);
bus;
uclass_next_device(&bus))
show_bus(bus);
} else {
int i;
/* show specific bus */
i = simple_strtoul(argv[1], NULL, 10);
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_AXI, i, &bus);
if (ret) {
printf("Invalid bus %d: err=%d\n", i, ret);
return CMD_RET_FAILURE;
}
show_bus(bus);
}
return 0;
}
static int do_axi_bus_num(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ret = 0;
int bus_no;
if (argc == 1) {
/* querying current setting */
struct udevice *bus;
if (!axi_get_cur_bus(&bus))
bus_no = bus->seq;
else
bus_no = -1;
printf("Current bus is %d\n", bus_no);
} else {
bus_no = simple_strtoul(argv[1], NULL, 10);
printf("Setting bus to %d\n", bus_no);
ret = axi_set_cur_bus(bus_no);
if (ret)
printf("Failure changing bus number (%d)\n", ret);
}
return ret ? CMD_RET_FAILURE : 0;
}
static int do_axi_md(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
/* Print that many bytes per line */
const uint DISP_LINE_LEN = 16;
u8 linebuf[DISP_LINE_LEN];
unsigned int k;
ulong addr, length, size;
ulong nbytes;
enum axi_size_t axisize;
int unitsize;
/*
* We use the last specified parameters, unless new ones are
* entered.
*/
size = dp_last_size;
addr = dp_last_addr;
length = dp_last_length;
if (argc < 3)
return CMD_RET_USAGE;
if (!axi_cur_bus) {
puts("No AXI bus selected\n");
return CMD_RET_FAILURE;
}
if ((flag & CMD_FLAG_REPEAT) == 0) {
size = simple_strtoul(argv[1], NULL, 10);
/*
* Address is specified since argc >= 3
*/
addr = simple_strtoul(argv[2], NULL, 16);
/*
* If there's another parameter, it is the length to display;
* length is the number of objects, not number of bytes
*/
if (argc > 3)
length = simple_strtoul(argv[3], NULL, 16);
}
switch (size) {
case 8:
axisize = AXI_SIZE_8;
unitsize = 1;
break;
case 16:
axisize = AXI_SIZE_16;
unitsize = 2;
break;
case 32:
axisize = AXI_SIZE_32;
unitsize = 4;
break;
default:
printf("Unknown read size '%lu'\n", size);
return CMD_RET_USAGE;
};
nbytes = length * unitsize;
do {
ulong linebytes = (nbytes > DISP_LINE_LEN) ?
DISP_LINE_LEN : nbytes;
for (k = 0; k < linebytes / unitsize; ++k) {
int ret = axi_read(axi_cur_bus, addr + k * unitsize,
linebuf + k * unitsize, axisize);
if (!ret) /* Continue if axi_read was successful */
continue;
if (ret == -ENOSYS)
printf("axi_read failed; read size not supported?\n");
else
printf("axi_read failed: err = %d\n", ret);
return CMD_RET_FAILURE;
}
print_buffer(addr, (void *)linebuf, unitsize,
linebytes / unitsize,
DISP_LINE_LEN / unitsize);
nbytes -= max(linebytes, 1UL);
addr += linebytes;
if (ctrlc())
break;
} while (nbytes > 0);
dp_last_size = size;
dp_last_addr = addr;
dp_last_length = length;
return 0;
}
static int do_axi_mw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
u32 writeval;
ulong addr, count, size;
enum axi_size_t axisize;
if (argc <= 3 || argc >= 6)
return CMD_RET_USAGE;
size = simple_strtoul(argv[1], NULL, 10);
switch (size) {
case 8:
axisize = AXI_SIZE_8;
break;
case 16:
axisize = AXI_SIZE_16;
break;
case 32:
axisize = AXI_SIZE_32;
break;
default:
printf("Unknown write size '%lu'\n", size);
return CMD_RET_USAGE;
};
/* Address is specified since argc > 4 */
addr = simple_strtoul(argv[2], NULL, 16);
/* Get the value to write */
writeval = simple_strtoul(argv[3], NULL, 16);
/* Count ? */
if (argc == 5)
count = simple_strtoul(argv[4], NULL, 16);
else
count = 1;
while (count-- > 0) {
int ret = axi_write(axi_cur_bus, addr + count * sizeof(u32),
&writeval, axisize);
if (ret) {
printf("axi_write failed: err = %d\n", ret);
return CMD_RET_FAILURE;
}
}
return 0;
}
static cmd_tbl_t cmd_axi_sub[] = {
U_BOOT_CMD_MKENT(bus, 1, 1, do_axi_show_bus, "", ""),
U_BOOT_CMD_MKENT(dev, 1, 1, do_axi_bus_num, "", ""),
U_BOOT_CMD_MKENT(md, 4, 1, do_axi_md, "", ""),
U_BOOT_CMD_MKENT(mw, 5, 1, do_axi_mw, "", ""),
};
static int do_ihs_axi(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
cmd_tbl_t *c;
if (argc < 2)
return CMD_RET_USAGE;
/* Strip off leading 'axi' command argument */
argc--;
argv++;
/* Hand off rest of command line to sub-commands */
c = find_cmd_tbl(argv[0], &cmd_axi_sub[0], ARRAY_SIZE(cmd_axi_sub));
if (c)
return c->cmd(cmdtp, flag, argc, argv);
else
return CMD_RET_USAGE;
}
static char axi_help_text[] =
"bus - show AXI bus info\n"
"axi dev [bus] - show or set current AXI bus to bus number [bus]\n"
"axi md size addr [# of objects] - read from AXI device at address [addr] and data width [size] (one of 8, 16, 32)\n"
"axi mw size addr value [count] - write data [value] to AXI device at address [addr] and data width [size] (one of 8, 16, 32)\n";
U_BOOT_CMD(axi, 7, 1, do_ihs_axi,
"AXI sub-system",
axi_help_text
);
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