/*
* Copyright (c) 2014 Marvell Technology Group Ltd.
*
* Alexandre Belloni <alexandre.belloni@free-electrons.com>
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <dt-bindings/clock/berlin2q.h>
#include "berlin2-div.h"
#include "berlin2-pll.h"
#include "common.h"
#define REG_PINMUX0 0x0018
#define REG_PINMUX5 0x002c
#define REG_SYSPLLCTL0 0x0030
#define REG_SYSPLLCTL4 0x0040
#define REG_CLKENABLE 0x00e8
#define REG_CLKSELECT0 0x00ec
#define REG_CLKSELECT1 0x00f0
#define REG_CLKSELECT2 0x00f4
#define REG_CLKSWITCH0 0x00f8
#define REG_CLKSWITCH1 0x00fc
#define REG_SW_GENERIC0 0x0110
#define REG_SW_GENERIC3 0x011c
#define REG_SDIO0XIN_CLKCTL 0x0158
#define REG_SDIO1XIN_CLKCTL 0x015c
#define MAX_CLKS 28
static struct clk_hw_onecell_data *clk_data;
static DEFINE_SPINLOCK(lock);
static void __iomem *gbase;
static void __iomem *cpupll_base;
enum {
REFCLK,
SYSPLL, CPUPLL,
AVPLL_B1, AVPLL_B2, AVPLL_B3, AVPLL_B4,
AVPLL_B5, AVPLL_B6, AVPLL_B7, AVPLL_B8,
};
static const char *clk_names[] = {
[REFCLK] = "refclk",
[SYSPLL] = "syspll",
[CPUPLL] = "cpupll",
[AVPLL_B1] = "avpll_b1",
[AVPLL_B2] = "avpll_b2",
[AVPLL_B3] = "avpll_b3",
[AVPLL_B4] = "avpll_b4",
[AVPLL_B5] = "avpll_b5",
[AVPLL_B6] = "avpll_b6",
[AVPLL_B7] = "avpll_b7",
[AVPLL_B8] = "avpll_b8",
};
static const struct berlin2_pll_map bg2q_pll_map __initconst = {
.vcodiv = {1, 0, 2, 0, 3, 4, 0, 6, 8},
.mult = 1,
.fbdiv_shift = 7,
.rfdiv_shift = 2,
.divsel_shift = 9,
};
static const u8 default_parent_ids[] = {
SYSPLL, AVPLL_B4, AVPLL_B5, AVPLL_B6, AVPLL_B7, SYSPLL
};
static const struct berlin2_div_data bg2q_divs[] __initconst = {
{
.name = "sys",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = CLK_IGNORE_UNUSED,
},
{
.name = "drmfigo",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "cfg",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "gfx2d",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "zsp",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "perif",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = CLK_IGNORE_UNUSED,
},
{
.name = "pcube",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "vscope",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "nfc_ecc",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "vpp",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "app",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "sdio0xin",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_SINGLE_DIV(REG_SDIO0XIN_CLKCTL),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
{
.name = "sdio1xin",
.parent_ids = default_parent_ids,
.num_parents = ARRAY_SIZE(default_parent_ids),
.map = {
BERLIN2_SINGLE_DIV(REG_SDIO1XIN_CLKCTL),
},
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
.flags = 0,
},
};
static const struct berlin2_gate_data bg2q_gates[] __initconst = {
{ "gfx2daxi", "perif", 5 },
{ "geth0", "perif", 8 },
{ "sata", "perif", 9 },
{ "ahbapb", "perif", 10, CLK_IGNORE_UNUSED },
{ "usb0", "perif", 11 },
{ "usb1", "perif", 12 },
{ "usb2", "perif", 13 },
{ "usb3", "perif", 14 },
{ "pbridge", "perif", 15, CLK_IGNORE_UNUSED },
{ "sdio", "perif", 16 },
{ "nfc", "perif", 18 },
{ "pcie", "perif", 22 },
};
static void __init berlin2q_clock_setup(struct device_node *np)
{
struct device_node *parent_np = of_get_parent(np);
const char *parent_names[9];
struct clk *clk;
struct clk_hw **hws;
int n, ret;
clk_data = kzalloc(sizeof(*clk_data) +
sizeof(*clk_data->hws) * MAX_CLKS, GFP_KERNEL);
if (!clk_data)
return;
clk_data->num = MAX_CLKS;
hws = clk_data->hws;
gbase = of_iomap(parent_np, 0);
if (!gbase) {
pr_err("%pOF: Unable to map global base\n", np);
return;
}
/* BG2Q CPU PLL is not part of global registers */
cpupll_base = of_iomap(parent_np, 1);
if (!cpupll_base) {
pr_err("%pOF: Unable to map cpupll base\n", np);
iounmap(gbase);
return;
}
/* overwrite default clock names with DT provided ones */
clk = of_clk_get_by_name(np, clk_names[REFCLK]);
if (!IS_ERR(clk)) {
clk_names[REFCLK] = __clk_get_name(clk);
clk_put(clk);
}
/* simple register PLLs */
ret = berlin2_pll_register(&bg2q_pll_map, gbase + REG_SYSPLLCTL0,
clk_names[SYSPLL], clk_names[REFCLK], 0);
if (ret)
goto bg2q_fail;
ret = berlin2_pll_register(&bg2q_pll_map, cpupll_base,
clk_names[CPUPLL], clk_names[REFCLK], 0);
if (ret)
goto bg2q_fail;
/* TODO: add BG2Q AVPLL */
/*
* TODO: add reference clock bypass switches:
* memPLLSWBypass, cpuPLLSWBypass, and sysPLLSWBypass
*/
/* clock divider cells */
for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
const struct berlin2_div_data *dd = &bg2q_divs[n];
int k;
for (k = 0; k < dd->num_parents; k++)
parent_names[k] = clk_names[dd->parent_ids[k]];
hws[CLKID_SYS + n] = berlin2_div_register(&dd->map, gbase,
dd->name, dd->div_flags, parent_names,
dd->num_parents, dd->flags, &lock);
}
/* clock gate cells */
for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
const struct berlin2_gate_data *gd = &bg2q_gates[n];
hws[CLKID_GFX2DAXI + n] = clk_hw_register_gate(NULL, gd->name,
gd->parent_name, gd->flags, gbase + REG_CLKENABLE,
gd->bit_idx, 0, &lock);
}
/* cpuclk divider is fixed to 1 */
hws[CLKID_CPU] =
clk_hw_register_fixed_factor(NULL, "cpu", clk_names[CPUPLL],
0, 1, 1);
/* twdclk is derived from cpu/3 */
hws[CLKID_TWD] =
clk_hw_register_fixed_factor(NULL, "twd", "cpu", 0, 1, 3);
/* check for errors on leaf clocks */
for (n = 0; n < MAX_CLKS; n++) {
if (!IS_ERR(hws[n]))
continue;
pr_err("%pOF: Unable to register leaf clock %d\n", np, n);
goto bg2q_fail;
}
/* register clk-provider */
of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
return;
bg2q_fail:
iounmap(cpupll_base);
iounmap(gbase);
}
CLK_OF_DECLARE(berlin2q_clk, "marvell,berlin2q-clk",
berlin2q_clock_setup);