/* Read a variable number of 32-bit values. Parameter count is not allowed to
* exceed USB_MAX_IOREAD32_COUNT.
*/
int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr,
unsigned int count)
{
int r;
int i;
zd_addr_t *a16;
u16 *v16;
unsigned int count16;
if (count > USB_MAX_IOREAD32_COUNT)
return -EINVAL;
/* Allocate a single memory block for values and addresses. */
count16 = 2*count;
a16 = (zd_addr_t *) kmalloc(count16 * (sizeof(zd_addr_t) + sizeof(u16)),
GFP_KERNEL);
if (!a16) {
dev_dbg_f(zd_chip_dev(chip),
"error ENOMEM in allocation of a16\n");
r = -ENOMEM;
goto out;
}
v16 = (u16 *)(a16 + count16);
for (i = 0; i < count; i++) {
int j = 2*i;
/* We read the high word always first. */
a16[j] = inc_addr(addr[i]);
a16[j+1] = addr[i];
}
r = zd_ioread16v_locked(chip, v16, a16, count16);
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error: zd_ioread16v_locked. Error number %d\n", r);
goto out;
}
for (i = 0; i < count; i++) {
int j = 2*i;
values[i] = (v16[j] << 16) | v16[j+1];
}
out:
kfree((void *)a16);
return r;
}
/* Read a variable number of 32-bit values. Parameter count is not allowed to
* exceed USB_MAX_IOREAD32_COUNT.
*/
int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr,
unsigned int count)
{
int r;
int i;
zd_addr_t a16[USB_MAX_IOREAD32_COUNT * 2];
u16 v16[USB_MAX_IOREAD32_COUNT * 2];
unsigned int count16;
if (count > USB_MAX_IOREAD32_COUNT)
return -EINVAL;
/* Use stack for values and addresses. */
count16 = 2 * count;
BUG_ON(count16 * sizeof(zd_addr_t) > sizeof(a16));
BUG_ON(count16 * sizeof(u16) > sizeof(v16));
for (i = 0; i < count; i++) {
int j = 2*i;
/* We read the high word always first. */
a16[j] = inc_addr(addr[i]);
a16[j+1] = addr[i];
}
r = zd_ioread16v_locked(chip, v16, a16, count16);
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error: %s. Error number %d\n", __func__, r);
return r;
}
for (i = 0; i < count; i++) {
int j = 2*i;
values[i] = (v16[j] << 16) | v16[j+1];
}
return 0;
}
