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/*
* This file is part of the coreboot project.
*
* Copyright 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 <arch/io.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/funitcfg.h>
#include <soc/nvidia/tegra/usb.h>
#include <soc/padconfig.h>
#include <string.h>
struct clk_dev_control {
uint32_t *clk_enb_set;
uint32_t *rst_dev_clr;
};
struct funit_cfg_data {
const char *name;
void *ctlr_base;
uint32_t *clk_src_reg;
const struct clk_dev_control * const dev_control;
uint32_t clk_enb_val;
};
enum {
CLK_L_SET = 0,
CLK_H_SET = 1,
CLK_U_SET = 2,
CLK_V_SET = 3,
CLK_W_SET = 4,
CLK_X_SET = 5,
CLK_Y_SET = 6,
};
#define CLK_SET_REGS(x) \
{ \
CLK_RST_REG(clk_enb_##x##_set), \
CLK_RST_REG(rst_dev_##x##_clr), \
}
static const struct clk_dev_control clk_data_arr[] = {
[CLK_L_SET] = CLK_SET_REGS(l),
[CLK_H_SET] = CLK_SET_REGS(h),
[CLK_U_SET] = CLK_SET_REGS(u),
[CLK_V_SET] = CLK_SET_REGS(v),
[CLK_W_SET] = CLK_SET_REGS(w),
[CLK_X_SET] = CLK_SET_REGS(x),
[CLK_Y_SET] = CLK_SET_REGS(y),
};
#define FUNIT_DATA(funit_, loname_, clk_set_) \
[FUNIT_INDEX(funit_)] = { \
.name = STRINGIFY(loname_), \
.ctlr_base = (void *)(uintptr_t)TEGRA_##funit_##_BASE, \
.clk_src_reg = CLK_RST_REG(clk_src_##loname_), \
.dev_control = &clk_data_arr[CLK_##clk_set_##_SET], \
.clk_enb_val = CLK_##clk_set_##_##funit_, \
}
#define FUNIT_DATA_USB(funit_, clk_set_) \
[FUNIT_INDEX(funit_)] = { \
.name = STRINGIFY(funit_), \
.ctlr_base = (void *)(uintptr_t)TEGRA_##funit_##_BASE, \
.dev_control = &clk_data_arr[CLK_##clk_set_##_SET], \
.clk_enb_val = CLK_##clk_set_##_##funit_, \
}
static const struct funit_cfg_data funit_data[] = {
FUNIT_DATA(I2C1, i2c1, L),
FUNIT_DATA(I2C2, i2c2, H),
FUNIT_DATA(I2C3, i2c3, U),
FUNIT_DATA(I2C5, i2c5, H),
FUNIT_DATA(I2C6, i2c6, X),
FUNIT_DATA(SDMMC1, sdmmc1, L),
FUNIT_DATA(SDMMC4, sdmmc4, L),
FUNIT_DATA_USB(USBD, L),
FUNIT_DATA_USB(USB2, H),
FUNIT_DATA(QSPI, qspi, Y),
FUNIT_DATA(I2S1, i2s1, L),
};
_Static_assert(ARRAY_SIZE(funit_data) == FUNIT_INDEX_MAX,
"funit_cfg_data array not filled out!");
static inline uint32_t get_clk_src_freq(uint32_t clk_src_freq_id)
{
uint32_t freq = 0;
switch (clk_src_freq_id) {
case CLK_M:
freq = TEGRA_CLK_M_KHZ;
break;
case PLLP:
freq = TEGRA_PLLP_KHZ;
break;
default:
printk(BIOS_SPEW, "%s ERROR: Unknown clk_src %d\n",
__func__, clk_src_freq_id);
}
return freq;
}
static void configure_clock(const struct funit_cfg * const entry,
const struct funit_cfg_data * const funit)
{
const char *funit_i2c = "i2c";
uint32_t clk_div;
uint32_t clk_div_mask;
uint32_t clk_src_freq;
clk_src_freq = get_clk_src_freq(entry->clk_src_freq_id);
if (strncmp(funit->name, funit_i2c, strlen(funit_i2c)) == 0) {
/* I2C funit */
clk_div = get_i2c_clk_div(clk_src_freq,
entry->clk_dev_freq_khz);
clk_div_mask = CLK_DIV_MASK_I2C;
} else {
/* Non I2C */
clk_div = get_clk_div(clk_src_freq, entry->clk_dev_freq_khz);
clk_div_mask = CLK_DIV_MASK;
}
_clock_set_div(funit->clk_src_reg, funit->name, clk_div,
clk_div_mask, entry->clk_src_id);
}
static inline int is_usb(uint32_t idx)
{
return (idx == FUNIT_USBD || idx == FUNIT_USB2);
}
void soc_configure_funits(const struct funit_cfg * const entries, size_t num)
{
size_t i;
for (i = 0; i < num; i++) {
const struct funit_cfg * const entry = &entries[i];
const struct funit_cfg_data *funit;
const struct clk_dev_control *dev_control;
int funit_usb = is_usb(entry->funit_index);
if (entry->funit_index >= FUNIT_INDEX_MAX) {
printk(BIOS_ERR, "Error: Index out of bounds\n");
continue;
}
funit = &funit_data[entry->funit_index];
dev_control = funit->dev_control;
/* USB controllers have a fixed clock source. */
if (!funit_usb)
configure_clock(entry, funit);
clock_grp_enable_clear_reset(funit->clk_enb_val,
dev_control->clk_enb_set,
dev_control->rst_dev_clr);
if (funit_usb)
usb_setup_utmip(funit->ctlr_base);
soc_configure_pads(entry->pad_cfg,entry->pad_cfg_size);
}
}
void __weak usb_setup_utmip(void *usb_base)
{
/* default empty implementation required if usb.c is not included */
printk(BIOS_ERR, "USB setup is not supported in current stage\n");
}
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