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#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/mcb.h>
#include "mcb-internal.h"
struct mcb_parse_priv {
phys_addr_t mapbase;
void __iomem *base;
};
#define for_each_chameleon_cell(dtype, p) \
for ((dtype) = get_next_dtype((p)); \
(dtype) != CHAMELEON_DTYPE_END; \
(dtype) = get_next_dtype((p)))
static inline uint32_t get_next_dtype(void __iomem *p)
{
uint32_t dtype;
dtype = readl(p);
return dtype >> 28;
}
static int chameleon_parse_bdd(struct mcb_bus *bus,
phys_addr_t mapbase,
void __iomem *base)
{
return 0;
}
static int chameleon_parse_gdd(struct mcb_bus *bus,
phys_addr_t mapbase,
void __iomem *base)
{
struct chameleon_gdd __iomem *gdd =
(struct chameleon_gdd __iomem *) base;
struct mcb_device *mdev;
u32 offset;
u32 size;
int ret;
__le32 reg1;
__le32 reg2;
mdev = mcb_alloc_dev(bus);
if (!mdev)
return -ENOMEM;
reg1 = readl(&gdd->reg1);
reg2 = readl(&gdd->reg2);
offset = readl(&gdd->offset);
size = readl(&gdd->size);
mdev->id = GDD_DEV(reg1);
mdev->rev = GDD_REV(reg1);
mdev->var = GDD_VAR(reg1);
mdev->bar = GDD_BAR(reg2);
mdev->group = GDD_GRP(reg2);
mdev->inst = GDD_INS(reg2);
pr_debug("Found a 16z%03d\n", mdev->id);
mdev->irq.start = GDD_IRQ(reg1);
mdev->irq.end = GDD_IRQ(reg1);
mdev->irq.flags = IORESOURCE_IRQ;
mdev->mem.start = mapbase + offset;
mdev->mem.end = mdev->mem.start + size - 1;
mdev->mem.flags = IORESOURCE_MEM;
mdev->is_added = false;
ret = mcb_device_register(bus, mdev);
if (ret < 0)
goto err;
return 0;
err:
mcb_free_dev(mdev);
return ret;
}
int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
void __iomem *base)
{
char __iomem *p = base;
struct chameleon_fpga_header *header;
uint32_t dtype;
int num_cells = 0;
int ret = 0;
u32 hsize;
hsize = sizeof(struct chameleon_fpga_header);
header = kzalloc(hsize, GFP_KERNEL);
if (!header)
return -ENOMEM;
/* Extract header information */
memcpy_fromio(header, p, hsize);
/* We only support chameleon v2 at the moment */
header->magic = le16_to_cpu(header->magic);
if (header->magic != CHAMELEONV2_MAGIC) {
pr_err("Unsupported chameleon version 0x%x\n",
header->magic);
kfree(header);
return -ENODEV;
}
p += hsize;
bus->revision = header->revision;
bus->model = header->model;
bus->minor = header->minor;
snprintf(bus->name, CHAMELEON_FILENAME_LEN + 1, "%s",
header->filename);
for_each_chameleon_cell(dtype, p) {
switch (dtype) {
case CHAMELEON_DTYPE_GENERAL:
ret = chameleon_parse_gdd(bus, mapbase, p);
if (ret < 0)
goto out;
p += sizeof(struct chameleon_gdd);
break;
case CHAMELEON_DTYPE_BRIDGE:
chameleon_parse_bdd(bus, mapbase, p);
p += sizeof(struct chameleon_bdd);
break;
case CHAMELEON_DTYPE_END:
break;
default:
pr_err("Invalid chameleon descriptor type 0x%x\n",
dtype);
kfree(header);
return -EINVAL;
}
num_cells++;
}
if (num_cells == 0)
num_cells = -EINVAL;
kfree(header);
return num_cells;
out:
kfree(header);
return ret;
}
EXPORT_SYMBOL_GPL(chameleon_parse_cells);
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