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/*
* This file is part of the coreboot project.
*
* Copyright 2019 Qualcomm Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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 <assert.h>
#include <commonlib/helpers.h>
#include <device/mmio.h>
#include <soc/clock.h>
#include <types.h>
#define DIV(div) (2 * div - 1)
struct clock_config qup_cfg[] = {
{
.hz = 7372800,
.src = SRC_GPLL0_EVEN_300MHZ,
.div = DIV(1),
.m = 384,
.n = 15625,
.d_2 = 15625,
},
{
.hz = SRC_XO_HZ, /* 19.2KHz */
.src = SRC_XO_19_2MHZ,
.div = DIV(1),
}
};
struct clock_config qspi_core_cfg[] = {
{
.hz = SRC_XO_HZ, /* 19.2KHz */
.src = SRC_XO_19_2MHZ,
.div = DIV(1),
},
{
.hz = 100 * MHz,
.src = SRC_GPLL0_EVEN_300MHZ,
.div = DIV(3),
},
{
.hz = 150 * MHz,
.src = SRC_GPLL0_EVEN_300MHZ,
.div = DIV(2),
},
{
.hz = GPLL0_EVEN_HZ, /* 300MHz */
.src = SRC_GPLL0_EVEN_300MHZ,
.div = DIV(1),
}
};
static int clock_configure_gpll0(void)
{
setbits_le32(&gcc->gpll0.user_ctl_u, 1 << SCALE_FREQ_SHFT);
/* Keep existing GPLL0 configuration, in RUN mode @600Mhz. */
setbits_le32(&gcc->gpll0.user_ctl,
1 << CLK_CTL_GPLL_PLLOUT_EVEN_SHFT |
1 << CLK_CTL_GPLL_PLLOUT_MAIN_SHFT |
1 << CLK_CTL_GPLL_PLLOUT_ODD_SHFT);
return 0;
}
static int clock_configure_mnd(struct sc7180_clock *clk, uint32_t m, uint32_t n,
uint32_t d_2)
{
struct sc7180_mnd_clock *mnd = (struct sc7180_mnd_clock *)clk;
setbits_le32(&clk->rcg_cfg,
RCG_MODE_DUAL_EDGE << CLK_CTL_CFG_MODE_SHFT);
write32(&mnd->m, m & CLK_CTL_RCG_MND_BMSK);
write32(&mnd->n, ~(n-m) & CLK_CTL_RCG_MND_BMSK);
write32(&mnd->d_2, ~(d_2) & CLK_CTL_RCG_MND_BMSK);
return 0;
}
static int clock_configure(struct sc7180_clock *clk,
struct clock_config *clk_cfg,
uint32_t hz, uint32_t num_perfs)
{
uint32_t reg_val;
uint32_t idx;
for (idx = 0; idx < num_perfs; idx++)
if (hz <= clk_cfg[idx].hz)
break;
assert(hz == clk_cfg[idx].hz);
reg_val = (clk_cfg[idx].src << CLK_CTL_CFG_SRC_SEL_SHFT) |
(clk_cfg[idx].div << CLK_CTL_CFG_SRC_DIV_SHFT);
/* Set clock config */
write32(&clk->rcg_cfg, reg_val);
if (clk_cfg[idx].m != 0)
clock_configure_mnd(clk, clk_cfg[idx].m, clk_cfg[idx].n,
clk_cfg[idx].d_2);
/* Commit config to RCG*/
setbits_le32(&clk->rcg_cmd, BIT(CLK_CTL_CMD_UPDATE_SHFT));
return 0;
}
static bool clock_is_off(u32 *cbcr_addr)
{
return (read32(cbcr_addr) & CLK_CTL_CBC_CLK_OFF_BMSK);
}
static int clock_enable_vote(void *cbcr_addr, void *vote_addr,
uint32_t vote_bit)
{
/* Set clock vote bit */
setbits_le32(vote_addr, BIT(vote_bit));
/* Ensure clock is enabled */
while (clock_is_off(cbcr_addr))
;
return 0;
}
static int clock_enable(void *cbcr_addr)
{
/* Set clock enable bit */
setbits_le32(cbcr_addr, BIT(CLK_CTL_CBC_CLK_EN_SHFT));
/* Ensure clock is enabled */
while (clock_is_off(cbcr_addr))
;
return 0;
}
void clock_reset_aop(void)
{
/* Bring AOP out of RESET */
clrbits_le32(&aoss->aoss_cc_apcs_misc, BIT(AOP_RESET_SHFT));
}
void clock_configure_qspi(uint32_t hz)
{
clock_configure(&gcc->qspi_core,
qspi_core_cfg, hz,
ARRAY_SIZE(qspi_core_cfg));
clock_enable(&gcc->qspi_cnoc_ahb_cbcr);
clock_enable(&gcc->qspi_core.cbcr);
}
int clock_reset_bcr(void *bcr_addr, bool reset)
{
struct sc7180_bcr *bcr = bcr_addr;
if (reset)
setbits_le32(bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT));
else
clrbits_le32(bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT));
return 0;
}
void clock_configure_qup(int qup, uint32_t hz)
{
int s = qup % QUP_WRAP1_S0;
struct sc7180_qupv3_clock *qup_clk = qup < QUP_WRAP1_S0 ?
&gcc->qup_wrap0_s[s] : &gcc->qup_wrap1_s[s];
clock_configure(&qup_clk->mnd_clk.clock, qup_cfg, hz,
ARRAY_SIZE(qup_cfg));
}
void clock_enable_qup(int qup)
{
int s = qup % QUP_WRAP1_S0;
int clk_en_off = qup < QUP_WRAP1_S0 ?
QUPV3_WRAP0_CLK_ENA_S(s) : QUPV3_WRAP1_CLK_ENA_S(s);
struct sc7180_qupv3_clock *qup_clk = qup < QUP_WRAP1_S0 ?
&gcc->qup_wrap0_s[s] : &gcc->qup_wrap1_s[s];
clock_enable_vote(&qup_clk->mnd_clk, &gcc->apcs_clk_br_en1,
clk_en_off);
}
void clock_init(void)
{
clock_configure_gpll0();
clock_enable_vote(&gcc->qup_wrap0_core_2x.cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP0_CORE_2X_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap0_core_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP0_CORE_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap0_m_ahb_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP_0_M_AHB_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap0_s_ahb_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP_0_S_AHB_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap1_core_2x_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP1_CORE_2X_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap1_core_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP1_CORE_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap1_m_ahb_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP_1_M_AHB_CLK_ENA);
clock_enable_vote(&gcc->qup_wrap1_s_ahb_cbcr,
&gcc->apcs_clk_br_en1,
QUPV3_WRAP_1_S_AHB_CLK_ENA);
}
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