23602dfd68
Fix the following issue detected by checkpatch: WARNING: Prefer 'unsigned int' to bare use of 'unsigned' TEST=None Change-Id: Iae22e724b6adae16248db7dc8f822f65bfadae5f Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com> Reviewed-on: https://review.coreboot.org/18873 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
149 lines
3 KiB
C
149 lines
3 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2014 Google Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <console/console.h>
|
|
#include <delay.h>
|
|
#include <arch/io.h>
|
|
#include <soc/iobp.h>
|
|
#include <soc/rcba.h>
|
|
|
|
#define IOBP_RETRY 1000
|
|
|
|
static inline int iobp_poll(void)
|
|
{
|
|
unsigned int try;
|
|
|
|
for (try = IOBP_RETRY; try > 0; try--) {
|
|
u16 status = RCBA16(IOBPS);
|
|
if ((status & IOBPS_READY) == 0)
|
|
return 1;
|
|
udelay(10);
|
|
}
|
|
|
|
printk(BIOS_ERR, "IOBP: timeout waiting for transaction to complete\n");
|
|
return 0;
|
|
}
|
|
|
|
u32 pch_iobp_read(u32 address)
|
|
{
|
|
u16 status;
|
|
|
|
if (!iobp_poll())
|
|
return 0;
|
|
|
|
/* Set the address */
|
|
RCBA32(IOBPIRI) = address;
|
|
|
|
/* READ OPCODE */
|
|
status = RCBA16(IOBPS);
|
|
status &= ~IOBPS_MASK;
|
|
status |= IOBPS_READ;
|
|
RCBA16(IOBPS) = status;
|
|
|
|
/* Undocumented magic */
|
|
RCBA16(IOBPU) = IOBPU_MAGIC;
|
|
|
|
/* Set ready bit */
|
|
status = RCBA16(IOBPS);
|
|
status |= IOBPS_READY;
|
|
RCBA16(IOBPS) = status;
|
|
|
|
if (!iobp_poll())
|
|
return 0;
|
|
|
|
/* Check for successful transaction */
|
|
status = RCBA16(IOBPS);
|
|
if (status & IOBPS_TX_MASK) {
|
|
printk(BIOS_ERR, "IOBP: read 0x%08x failed\n", address);
|
|
return 0;
|
|
}
|
|
|
|
/* Read IOBP data */
|
|
return RCBA32(IOBPD);
|
|
}
|
|
|
|
void pch_iobp_write(u32 address, u32 data)
|
|
{
|
|
u16 status;
|
|
|
|
if (!iobp_poll())
|
|
return;
|
|
|
|
/* Set the address */
|
|
RCBA32(IOBPIRI) = address;
|
|
|
|
/* WRITE OPCODE */
|
|
status = RCBA16(IOBPS);
|
|
status &= ~IOBPS_MASK;
|
|
status |= IOBPS_WRITE;
|
|
RCBA16(IOBPS) = status;
|
|
|
|
RCBA32(IOBPD) = data;
|
|
|
|
/* Undocumented magic */
|
|
RCBA16(IOBPU) = IOBPU_MAGIC;
|
|
|
|
/* Set ready bit */
|
|
status = RCBA16(IOBPS);
|
|
status |= IOBPS_READY;
|
|
RCBA16(IOBPS) = status;
|
|
|
|
if (!iobp_poll())
|
|
return;
|
|
|
|
/* Check for successful transaction */
|
|
status = RCBA16(IOBPS);
|
|
if (status & IOBPS_TX_MASK)
|
|
printk(BIOS_ERR, "IOBP: write 0x%08x failed\n", address);
|
|
}
|
|
|
|
void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue)
|
|
{
|
|
u32 data = pch_iobp_read(address);
|
|
|
|
/* Update the data */
|
|
data &= andvalue;
|
|
data |= orvalue;
|
|
|
|
pch_iobp_write(address, data);
|
|
}
|
|
|
|
void pch_iobp_exec(u32 addr, u16 op_code, u8 route_id, u32 *data, u8 *resp)
|
|
{
|
|
if (!data || !resp)
|
|
return;
|
|
|
|
*resp = -1;
|
|
if (!iobp_poll())
|
|
return;
|
|
|
|
/* RCBA2330[31:0] = Address */
|
|
RCBA32(IOBPIRI) = addr;
|
|
/* RCBA2338[15:8] = opcode */
|
|
RCBA16(IOBPS) = (RCBA16(IOBPS) & 0x00ff) | op_code;
|
|
/* RCBA233A[15:8] = 0xf0 RCBA233A[7:0] = Route ID */
|
|
RCBA16(IOBPU) = IOBPU_MAGIC | route_id;
|
|
|
|
if (op_code == IOBP_PCICFG_WRITE)
|
|
RCBA32(IOBPD) = *data;
|
|
/* Set RCBA2338[0] to trigger IOBP transaction*/
|
|
RCBA16(IOBPS) = RCBA16(IOBPS) | 0x1;
|
|
|
|
if (!iobp_poll())
|
|
return;
|
|
|
|
*resp = (RCBA16(IOBPS) & IOBPS_TX_MASK) >> 1;
|
|
*data = RCBA32(IOBPD);
|
|
}
|