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iosf: make iosf_rw take a larger addr

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For higher DPIO ranges for example.  Also fix it up to use
intel_register_read/write.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Jesse Barnes 2014-01-28 14:17:30 -08:00
parent e558dd998d
commit 5e21b434da
1 changed files with 14 additions and 25 deletions
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39
lib/intel_iosf.c
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@ -7,10 +7,9 @@
#define TIMEOUT_US 500000
static int vlv_sideband_rw(uint32_t port, uint8_t opcode, uint8_t addr,
static int vlv_sideband_rw(uint32_t port, uint8_t opcode, uint32_t addr,
uint32_t *val)
{
volatile uint32_t *ptr;
int timeout = 0;
uint32_t cmd, devfn, be, bar;
int is_read = (opcode == PUNIT_OPCODE_REG_READ ||
@ -24,43 +23,33 @@ static int vlv_sideband_rw(uint32_t port, uint8_t opcode, uint8_t addr,
(port << IOSF_PORT_SHIFT) | (be << IOSF_BYTE_ENABLES_SHIFT) |
(bar << IOSF_BAR_SHIFT);
ptr = (volatile uint32_t*)((volatile char*)mmio +
VLV_IOSF_DOORBELL_REQ);
if (*ptr & IOSF_SB_BUSY) {
if (intel_register_read(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) {
fprintf(stderr, "warning: pcode (%s) mailbox access failed\n",
is_read ? "read" : "write");
return -EAGAIN;
}
ptr = (volatile uint32_t*)((volatile char*)mmio + VLV_IOSF_ADDR);
*ptr = addr;
if (!is_read) {
ptr = (volatile uint32_t*)((volatile char*)mmio +
VLV_IOSF_DATA);
*ptr = *val;
}
ptr = (volatile uint32_t*)((volatile char*)mmio +
VLV_IOSF_DOORBELL_REQ);
*ptr = cmd;
intel_register_write(VLV_IOSF_ADDR, addr);
if (!is_read)
intel_register_write(VLV_IOSF_DATA, *val);
intel_register_write(VLV_IOSF_DOORBELL_REQ, cmd);
do {
usleep(1);
timeout++;
} while ((*ptr & IOSF_SB_BUSY) && timeout < TIMEOUT_US);
} while (intel_register_read(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY &&
timeout < TIMEOUT_US);
if (timeout >= TIMEOUT_US) {
fprintf(stderr, "timeout waiting for pcode %s (%d) to finish\n",
opcode == PUNIT_OPCODE_REG_READ ? "read" : "write",
addr);
is_read ? "read" : "write", addr);
return -ETIMEDOUT;
}
if (is_read) {
ptr = (volatile uint32_t*)((volatile char*)mmio +
VLV_IOSF_DATA);
*val = *ptr;
}
*ptr = 0;
if (is_read)
*val = intel_register_read(VLV_IOSF_DATA);
intel_register_write(VLV_IOSF_DATA, 0);
return 0;
}