blob: 18b187693327cadff63084ac98c64e45713175c8 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 - 2015 The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <device/mmio.h>
#include <soc/iomap.h>
#include <soc/gsbi.h>
#include <console/console.h>
static inline void *gsbi_ctl_reg_addr(gsbi_id_t gsbi_id)
{
switch (gsbi_id) {
case GSBI_ID_1:
return GSBI1_CTL_REG;
case GSBI_ID_2:
return GSBI2_CTL_REG;
case GSBI_ID_3:
return GSBI3_CTL_REG;
case GSBI_ID_4:
return GSBI4_CTL_REG;
case GSBI_ID_5:
return GSBI5_CTL_REG;
case GSBI_ID_6:
return GSBI6_CTL_REG;
case GSBI_ID_7:
return GSBI7_CTL_REG;
default:
printk(BIOS_ERR, "Unsupported GSBI%d\n", gsbi_id);
return 0;
}
}
gsbi_return_t gsbi_init(gsbi_id_t gsbi_id, gsbi_protocol_t protocol)
{
unsigned int reg_val;
unsigned int m = 1;
unsigned int n = 4;
unsigned int pre_div = 4;
unsigned int src = 3;
unsigned int mnctr_mode = 2;
void *gsbi_ctl = gsbi_ctl_reg_addr(gsbi_id);
if (!gsbi_ctl)
return GSBI_ID_ERROR;
write32(GSBI_HCLK_CTL(gsbi_id),
(1 << GSBI_HCLK_CTL_GATE_ENA) | (1 << GSBI_HCLK_CTL_BRANCH_ENA));
if (gsbi_init_board(gsbi_id))
return GSBI_UNSUPPORTED;
write32(GSBI_QUP_APSS_NS_REG(gsbi_id), 0);
write32(GSBI_QUP_APSS_MD_REG(gsbi_id), 0);
reg_val = ((m & GSBI_QUP_APPS_M_MASK) << GSBI_QUP_APPS_M_SHFT) |
((~n & GSBI_QUP_APPS_D_MASK) << GSBI_QUP_APPS_D_SHFT);
write32(GSBI_QUP_APSS_MD_REG(gsbi_id), reg_val);
reg_val = (((~(n - m)) & GSBI_QUP_APPS_N_MASK) <<
GSBI_QUP_APPS_N_SHFT) |
((mnctr_mode & GSBI_QUP_APPS_MNCTR_MODE_MSK) <<
GSBI_QUP_APPS_MNCTR_MODE_SFT) |
(((pre_div - 1) & GSBI_QUP_APPS_PRE_DIV_MSK) <<
GSBI_QUP_APPS_PRE_DIV_SFT) |
(src & GSBI_QUP_APPS_SRC_SEL_MSK);
write32(GSBI_QUP_APSS_NS_REG(gsbi_id), reg_val);
reg_val |= (1 << GSBI_QUP_APPS_ROOT_ENA_SFT) |
(1 << GSBI_QUP_APPS_MNCTR_EN_SFT);
write32(GSBI_QUP_APSS_NS_REG(gsbi_id), reg_val);
reg_val |= (1 << GSBI_QUP_APPS_BRANCH_ENA_SFT);
write32(GSBI_QUP_APSS_NS_REG(gsbi_id), reg_val);
/*Select i2c protocol*/
write32(gsbi_ctl,
((GSBI_CTL_PROTO_I2C & GSBI_CTL_PROTO_CODE_MSK) << GSBI_CTL_PROTO_CODE_SFT));
return GSBI_SUCCESS;
}