[U-Boot] [PATCH 41/51] cmd: Add ihs axi command
Mario Six
mario.six at gdsys.cc
Tue Jul 25 08:14:33 UTC 2017
Hi Simon,
On Wed, Jul 19, 2017 at 11:06 AM, Simon Glass <sjg at chromium.org> wrote:
> On 14 July 2017 at 05:55, Mario Six <mario.six at gdsys.cc> wrote:
>> Add a command to debug the IHS AXI bus.
>>
>> Signed-off-by: Mario Six <mario.six at gdsys.cc>
>> ---
>>
>> cmd/Kconfig | 5 ++
>> cmd/Makefile | 2 +
>> cmd/ihs_axi.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 264 insertions(+)
>> create mode 100644 cmd/ihs_axi.c
>
> Reviewed-by: Simon Glass <sjg at chromium.org>
>
> nits below
>
>>
>> diff --git a/cmd/Kconfig b/cmd/Kconfig
>> index b632049022..4bbe9d435c 100644
>> --- a/cmd/Kconfig
>> +++ b/cmd/Kconfig
>> @@ -753,6 +753,11 @@ config CMD_SATA
>> Attachment, where AT refers to an IBM AT (Advanced Technology)
>> computer released in 1984.
>>
>> +config CMD_IHS_AXI
>> + bool "axi"
>> + help
>> + Enable the GDSYS IHS AXI command for accessing the AXI bus.
>
> Can we make this help generic?
>
> depends on AXI
>
>
Will fix in v2. The AXI driver will have to become more general anyway, so
adjusting the matching command is prudent as well.
>> +
>> endmenu
>>
>>
>> diff --git a/cmd/Makefile b/cmd/Makefile
>> index c30511982b..0baaf76b47 100644
>> --- a/cmd/Makefile
>> +++ b/cmd/Makefile
>> @@ -144,6 +144,8 @@ obj-$(CONFIG_CMD_DFU) += dfu.o
>> obj-$(CONFIG_CMD_GPT) += gpt.o
>> obj-$(CONFIG_CMD_ETHSW) += ethsw.o
>>
>> +obj-$(CONFIG_CMD_IHS_AXI) += ihs_axi.o
>> +
>> # Power
>> obj-$(CONFIG_CMD_PMIC) += pmic.o
>> obj-$(CONFIG_CMD_REGULATOR) += regulator.o
>> diff --git a/cmd/ihs_axi.c b/cmd/ihs_axi.c
>> new file mode 100644
>> index 0000000000..336c239fae
>> --- /dev/null
>> +++ b/cmd/ihs_axi.c
>> @@ -0,0 +1,257 @@
>> +/*
>> + * (C) Copyright 2016
>> + * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach at gdsys.cc
>> + *
>> + * (C) Copyright 2017
>> + * Mario Six, Guntermann & Drunck GmbH, mario.six at gdsys.cc
>> + *
>> + * SPDX-License-Identifier: GPL-2.0+
>> + */
>> +
>> +#include <common.h>
>> +#include <dm.h>
>> +#include <command.h>
>> +#include <console.h>
>> +#include <ihs_axi.h>
>> +
>> +static struct udevice *axi_cur_bus;
>> +static uint dp_last_addr;
>> +static uint dp_last_length = 0x40;
>> +
>> +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)) {
>> + //struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
>> +
>> + //printf(" %02x: %s, offset len %x, flags %x\n",
>> + //chip->chip_addr, dev->name, chip->offset_len,
>> + //chip->flags);
>
> debug() ?
>
That's leftover development code, sorry. I'll move it to debug in v2.
>> + printf(" %s\n", dev->name);
>> + }
>> +}
>> +
>> +static int do_axi_show_bus(cmd_tbl_t *cmdtp, int flag, int argc,
>> + char * const argv[])
>> +{
>> + if (argc == 1) {
>> + /* show all busses */
>> + struct udevice *bus;
>> + struct uclass *uc;
>> + int ret;
>> +
>> + ret = uclass_get(UCLASS_IHS_AXI, &uc);
>> + if (ret)
>> + return CMD_RET_FAILURE;
>> + uclass_foreach_dev(bus, uc)
>> + 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_IHS_AXI, i, &bus);
>
> This is fine, but note that above you may be looking at buses that are
> not probed (since you use the find API). Here the device will be
> probed.
>
Ah, I see. I'll equalize the behavior in v2.
>> + if (ret) {
>> + printf("Invalid bus %d: err=%d\n", i, ret);
>> + return CMD_RET_FAILURE;
>> + }
>> + show_bus(bus);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int cmd_axi_set_bus_num(unsigned int busnum)
>> +{
>> + struct udevice *bus;
>> + int ret;
>> +
>> + ret = uclass_get_device_by_seq(UCLASS_IHS_AXI, busnum, &bus);
>> + if (ret) {
>> + debug("%s: No bus %d\n", __func__, busnum);
>> + return ret;
>> + }
>> + axi_cur_bus = bus;
>> +
>> + return 0;
>> +}
>> +
>> +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;
>> +}
>> +
>> +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 = cmd_axi_set_bus_num(bus_no);
>> +
>> + if (ret)
>> + printf("Failure changing bus number (%d)\n", ret);
>> + }
>> +
>> + return ret ? CMD_RET_FAILURE : 0;
>> +}
>> +
>> +#define DISP_LINE_LEN 16
>> +
>> +int do_axi_md(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>> +{
>> + unsigned int k;
>> + ulong addr, length;
>> + int rc = 0;
>> + u32 linebuf[DISP_LINE_LEN / sizeof(u32)];
>> + ulong nbytes;
>> +
>> + /*
>> + * We use the last specified parameters, unless new ones are
>> + * entered.
>> + */
>> + addr = dp_last_addr;
>> + length = dp_last_length;
>> +
>> + if (argc < 2)
>> + return CMD_RET_USAGE;
>> +
>> + if (!axi_cur_bus) {
>> + puts("No AXI bus selected\n");
>> + return ENODEV;
>> + }
>> +
>> + if ((flag & CMD_FLAG_REPEAT) == 0) {
>> + /*
>> + * Address is specified since argc > 3
>> + */
>> + addr = simple_strtoul(argv[1], NULL, 16);
>> +
>> + /*
>> + * If another parameter, it is the length to display.
>> + * Length is the number of objects, not number of bytes.
>> + */
>> + if (argc > 2)
>> + length = simple_strtoul(argv[2], NULL, 16);
>> + }
>> +
>> + nbytes = length * sizeof(u32);
>> + do {
>> + ulong linebytes = (nbytes > DISP_LINE_LEN) ?
>> + DISP_LINE_LEN : nbytes;
>> +
>> + for (k = 0; k < linebytes / sizeof(u32); ++k)
>> + axi_read(axi_cur_bus, addr + k * sizeof(u32),
>> + &linebuf[k]);
>> + print_buffer(addr, (void *)linebuf, sizeof(u32),
>> + linebytes / sizeof(u32),
>> + DISP_LINE_LEN / sizeof(u32));
>> +
>> + nbytes -= linebytes;
>> + addr += linebytes;
>> + if (ctrlc()) {
>> + rc = 1;
>> + break;
>> + }
>> + } while (nbytes > 0);
>> +
>> + dp_last_addr = addr;
>> + dp_last_length = length;
>> +
>> + return rc;
>> +}
>> +
>> +static int do_axi_mw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>> +{
>> + u32 writeval;
>> + ulong addr, count;
>> +
>> + if ((argc < 3) || (argc > 4))
>> + return CMD_RET_USAGE;
>> +
>> + /* Address is specified since argc > 3 */
>> + addr = simple_strtoul(argv[1], NULL, 16);
>> +
>> + /* Get the value to write. */
>> + writeval = simple_strtoul(argv[2], NULL, 16);
>> +
>> + /* Count ? */
>> + if (argc == 4)
>> + count = simple_strtoul(argv[3], NULL, 16);
>> + else
>> + count = 1;
>> +
>> + while (count-- > 0)
>> + axi_write(axi_cur_bus, addr + count * sizeof(u32), writeval);
>
> Error check
>
Will add in v2.
>> +
>> + 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, 3, 1, do_axi_md, "", ""),
>> + U_BOOT_CMD_MKENT(mw, 4, 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++;
>> +
>> + 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 [dev] - show or set current AXI bus\n"
>> + "axi md address [# of objects] - read from AXI device\n"
>> + "axi mw address value [count] - write to AXI device (fill)\n";
>> +
>> +U_BOOT_CMD(
>> + axi, 7, 1, do_ihs_axi,
>> + "AXI sub-system",
>> + axi_help_text
>> +);
>> --
>> 2.11.0
>>
>
> Regards,
> Simon
Best regards,
Mario
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