/*
|
* PCI emulation device which swaps the case of text
|
*
|
* Copyright (c) 2014 Google, Inc
|
* Written by Simon Glass <sjg@chromium.org>
|
*
|
* SPDX-License-Identifier: GPL-2.0+
|
*/
|
|
#include <common.h>
|
#include <dm.h>
|
#include <errno.h>
|
#include <pci.h>
|
#include <asm/test.h>
|
#include <linux/ctype.h>
|
|
/**
|
* struct swap_case_platdata - platform data for this device
|
*
|
* @command: Current PCI command value
|
* @bar: Current base address values
|
*/
|
struct swap_case_platdata {
|
u16 command;
|
u32 bar[2];
|
};
|
|
#define offset_to_barnum(offset) \
|
(((offset) - PCI_BASE_ADDRESS_0) / sizeof(u32))
|
|
enum {
|
MEM_TEXT_SIZE = 0x100,
|
};
|
|
enum swap_case_op {
|
OP_TO_LOWER,
|
OP_TO_UPPER,
|
OP_SWAP,
|
};
|
|
static struct pci_bar {
|
int type;
|
u32 size;
|
} barinfo[] = {
|
{ PCI_BASE_ADDRESS_SPACE_IO, 1 },
|
{ PCI_BASE_ADDRESS_MEM_TYPE_32, MEM_TEXT_SIZE },
|
{ 0, 0 },
|
{ 0, 0 },
|
{ 0, 0 },
|
{ 0, 0 },
|
};
|
|
struct swap_case_priv {
|
enum swap_case_op op;
|
char mem_text[MEM_TEXT_SIZE];
|
};
|
|
static int sandbox_swap_case_get_devfn(struct udevice *dev)
|
{
|
struct pci_child_platdata *plat = dev_get_parent_platdata(dev);
|
|
return plat->devfn;
|
}
|
|
static int sandbox_swap_case_read_config(struct udevice *emul, uint offset,
|
ulong *valuep, enum pci_size_t size)
|
{
|
struct swap_case_platdata *plat = dev_get_platdata(emul);
|
|
switch (offset) {
|
case PCI_COMMAND:
|
*valuep = plat->command;
|
break;
|
case PCI_HEADER_TYPE:
|
*valuep = 0;
|
break;
|
case PCI_VENDOR_ID:
|
*valuep = SANDBOX_PCI_VENDOR_ID;
|
break;
|
case PCI_DEVICE_ID:
|
*valuep = SANDBOX_PCI_DEVICE_ID;
|
break;
|
case PCI_CLASS_DEVICE:
|
if (size == PCI_SIZE_8) {
|
*valuep = SANDBOX_PCI_CLASS_SUB_CODE;
|
} else {
|
*valuep = (SANDBOX_PCI_CLASS_CODE << 8) |
|
SANDBOX_PCI_CLASS_SUB_CODE;
|
}
|
break;
|
case PCI_CLASS_CODE:
|
*valuep = SANDBOX_PCI_CLASS_CODE;
|
break;
|
case PCI_BASE_ADDRESS_0:
|
case PCI_BASE_ADDRESS_1:
|
case PCI_BASE_ADDRESS_2:
|
case PCI_BASE_ADDRESS_3:
|
case PCI_BASE_ADDRESS_4:
|
case PCI_BASE_ADDRESS_5: {
|
int barnum;
|
u32 *bar, result;
|
|
barnum = offset_to_barnum(offset);
|
bar = &plat->bar[barnum];
|
|
result = *bar;
|
if (*bar == 0xffffffff) {
|
if (barinfo[barnum].type) {
|
result = (~(barinfo[barnum].size - 1) &
|
PCI_BASE_ADDRESS_IO_MASK) |
|
PCI_BASE_ADDRESS_SPACE_IO;
|
} else {
|
result = (~(barinfo[barnum].size - 1) &
|
PCI_BASE_ADDRESS_MEM_MASK) |
|
PCI_BASE_ADDRESS_MEM_TYPE_32;
|
}
|
}
|
debug("r bar %d=%x\n", barnum, result);
|
*valuep = result;
|
break;
|
}
|
}
|
|
return 0;
|
}
|
|
static int sandbox_swap_case_write_config(struct udevice *emul, uint offset,
|
ulong value, enum pci_size_t size)
|
{
|
struct swap_case_platdata *plat = dev_get_platdata(emul);
|
|
switch (offset) {
|
case PCI_COMMAND:
|
plat->command = value;
|
break;
|
case PCI_BASE_ADDRESS_0:
|
case PCI_BASE_ADDRESS_1: {
|
int barnum;
|
u32 *bar;
|
|
barnum = offset_to_barnum(offset);
|
bar = &plat->bar[barnum];
|
|
debug("w bar %d=%lx\n", barnum, value);
|
*bar = value;
|
break;
|
}
|
}
|
|
return 0;
|
}
|
|
static int sandbox_swap_case_find_bar(struct udevice *emul, unsigned int addr,
|
int *barnump, unsigned int *offsetp)
|
{
|
struct swap_case_platdata *plat = dev_get_platdata(emul);
|
int barnum;
|
|
for (barnum = 0; barnum < ARRAY_SIZE(barinfo); barnum++) {
|
unsigned int size = barinfo[barnum].size;
|
|
if (addr >= plat->bar[barnum] &&
|
addr < plat->bar[barnum] + size) {
|
*barnump = barnum;
|
*offsetp = addr - plat->bar[barnum];
|
return 0;
|
}
|
}
|
*barnump = -1;
|
|
return -ENOENT;
|
}
|
|
static void sandbox_swap_case_do_op(enum swap_case_op op, char *str, int len)
|
{
|
for (; len > 0; len--, str++) {
|
switch (op) {
|
case OP_TO_UPPER:
|
*str = toupper(*str);
|
break;
|
case OP_TO_LOWER:
|
*str = tolower(*str);
|
break;
|
case OP_SWAP:
|
if (isupper(*str))
|
*str = tolower(*str);
|
else
|
*str = toupper(*str);
|
break;
|
}
|
}
|
}
|
|
int sandbox_swap_case_read_io(struct udevice *dev, unsigned int addr,
|
ulong *valuep, enum pci_size_t size)
|
{
|
struct swap_case_priv *priv = dev_get_priv(dev);
|
unsigned int offset;
|
int barnum;
|
int ret;
|
|
ret = sandbox_swap_case_find_bar(dev, addr, &barnum, &offset);
|
if (ret)
|
return ret;
|
|
if (barnum == 0 && offset == 0)
|
*valuep = (*valuep & ~0xff) | priv->op;
|
|
return 0;
|
}
|
|
int sandbox_swap_case_write_io(struct udevice *dev, unsigned int addr,
|
ulong value, enum pci_size_t size)
|
{
|
struct swap_case_priv *priv = dev_get_priv(dev);
|
unsigned int offset;
|
int barnum;
|
int ret;
|
|
ret = sandbox_swap_case_find_bar(dev, addr, &barnum, &offset);
|
if (ret)
|
return ret;
|
if (barnum == 0 && offset == 0)
|
priv->op = value;
|
|
return 0;
|
}
|
|
static int sandbox_swap_case_map_physmem(struct udevice *dev,
|
phys_addr_t addr, unsigned long *lenp, void **ptrp)
|
{
|
struct swap_case_priv *priv = dev_get_priv(dev);
|
unsigned int offset, avail;
|
int barnum;
|
int ret;
|
|
ret = sandbox_swap_case_find_bar(dev, addr, &barnum, &offset);
|
if (ret)
|
return ret;
|
if (barnum == 1) {
|
*ptrp = priv->mem_text + offset;
|
avail = barinfo[1].size - offset;
|
if (avail > barinfo[1].size)
|
*lenp = 0;
|
else
|
*lenp = min(*lenp, (ulong)avail);
|
|
return 0;
|
}
|
|
return -ENOENT;
|
}
|
|
static int sandbox_swap_case_unmap_physmem(struct udevice *dev,
|
const void *vaddr, unsigned long len)
|
{
|
struct swap_case_priv *priv = dev_get_priv(dev);
|
|
sandbox_swap_case_do_op(priv->op, (void *)vaddr, len);
|
|
return 0;
|
}
|
|
struct dm_pci_emul_ops sandbox_swap_case_emul_ops = {
|
.get_devfn = sandbox_swap_case_get_devfn,
|
.read_config = sandbox_swap_case_read_config,
|
.write_config = sandbox_swap_case_write_config,
|
.read_io = sandbox_swap_case_read_io,
|
.write_io = sandbox_swap_case_write_io,
|
.map_physmem = sandbox_swap_case_map_physmem,
|
.unmap_physmem = sandbox_swap_case_unmap_physmem,
|
};
|
|
static const struct udevice_id sandbox_swap_case_ids[] = {
|
{ .compatible = "sandbox,swap-case" },
|
{ }
|
};
|
|
U_BOOT_DRIVER(sandbox_swap_case_emul) = {
|
.name = "sandbox_swap_case_emul",
|
.id = UCLASS_PCI_EMUL,
|
.of_match = sandbox_swap_case_ids,
|
.ops = &sandbox_swap_case_emul_ops,
|
.priv_auto_alloc_size = sizeof(struct swap_case_priv),
|
.platdata_auto_alloc_size = sizeof(struct swap_case_platdata),
|
};
|
