/*
* Copyright (C) 2017 NVIDIA Corporation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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 <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include "gk20a/platform_gk20a.h"
#include "gm20b/clk_gm20b.h"
static int rate_get(void *data, u64 *val)
{
struct gk20a *g = (struct gk20a *)data;
struct clk_gk20a *clk = &g->clk;
*val = (u64)rate_gpc2clk_to_gpu(clk->gpc_pll.freq);
return 0;
}
static int rate_set(void *data, u64 val)
{
struct gk20a *g = (struct gk20a *)data;
return g->ops.clk.set_rate(g, CTRL_CLK_DOMAIN_GPCCLK, (u32)val);
}
DEFINE_SIMPLE_ATTRIBUTE(rate_fops, rate_get, rate_set, "%llu\n");
static int pll_reg_show(struct seq_file *s, void *data)
{
struct gk20a *g = s->private;
struct nvgpu_clk_pll_debug_data d;
u32 reg, m, n, pl, f;
int err = 0;
if (g->ops.clk.get_pll_debug_data) {
err = g->ops.clk.get_pll_debug_data(g, &d);
if (err)
return err;
} else {
return -EINVAL;
}
seq_printf(s, "bypassctrl = %s, ",
d.trim_sys_bypassctrl_val ? "bypass" : "vco");
seq_printf(s, "sel_vco = %s, ",
d.trim_sys_sel_vco_val ? "vco" : "bypass");
seq_printf(s, "cfg = 0x%x : %s : %s : %s\n", d.trim_sys_gpcpll_cfg_val,
d.trim_sys_gpcpll_cfg_enabled ? "enabled" : "disabled",
d.trim_sys_gpcpll_cfg_locked ? "locked" : "unlocked",
d.trim_sys_gpcpll_cfg_sync_on ? "sync_on" : "sync_off");
reg = d.trim_sys_gpcpll_coeff_val;
m = d.trim_sys_gpcpll_coeff_mdiv;
n = d.trim_sys_gpcpll_coeff_ndiv;
pl = d.trim_sys_gpcpll_coeff_pldiv;
f = g->clk.gpc_pll.clk_in * n / (m * nvgpu_pl_to_div(pl));
seq_printf(s, "coef = 0x%x : m = %u : n = %u : pl = %u", reg, m, n, pl);
seq_printf(s, " : pll_f(gpu_f) = %u(%u) kHz\n", f, f/2);
seq_printf(s, "dvfs0 = 0x%x : d = %u : dmax = %u : doffs = %u\n",
d.trim_sys_gpcpll_dvfs0_val,
d.trim_sys_gpcpll_dvfs0_dfs_coeff,
d.trim_sys_gpcpll_dvfs0_dfs_det_max,
d.trim_sys_gpcpll_dvfs0_dfs_dc_offset);
return 0;
}
static int pll_reg_open(struct inode *inode, struct file *file)
{
return single_open(file, pll_reg_show, inode->i_private);
}
static const struct file_operations pll_reg_fops = {
.open = pll_reg_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int pll_reg_raw_show(struct seq_file *s, void *data)
{
struct gk20a *g = s->private;
struct nvgpu_clk_pll_debug_data d;
u32 reg;
int err = 0;
if (g->ops.clk.get_pll_debug_data) {
err = g->ops.clk.get_pll_debug_data(g, &d);
if (err)
return err;
} else {
return -EINVAL;
}
seq_puts(s, "GPCPLL REGISTERS:\n");
for (reg = d.trim_sys_gpcpll_cfg_reg;
reg <= d.trim_sys_gpcpll_dvfs2_reg;
reg += sizeof(u32))
seq_printf(s, "[0x%02x] = 0x%08x\n", reg, gk20a_readl(g, reg));
seq_puts(s, "\nGPC CLK OUT REGISTERS:\n");
seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_sel_vco_reg,
d.trim_sys_sel_vco_val);
seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_gpc2clk_out_reg,
d.trim_sys_gpc2clk_out_val);
seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_bypassctrl_reg,
d.trim_sys_bypassctrl_val);
return 0;
}
static int pll_reg_raw_open(struct inode *inode, struct file *file)
{
return single_open(file, pll_reg_raw_show, inode->i_private);
}
static ssize_t pll_reg_raw_write(struct file *file,
const char __user *userbuf, size_t count, loff_t *ppos)
{
struct gk20a *g = file->f_path.dentry->d_inode->i_private;
char buf[80];
u32 reg, val;
int err = 0;
if (sizeof(buf) <= count)
return -EINVAL;
if (copy_from_user(buf, userbuf, count))
return -EFAULT;
/* terminate buffer and trim - white spaces may be appended
* at the end when invoked from shell command line */
buf[count] = '\0';
strim(buf);
if (sscanf(buf, "[0x%x] = 0x%x", ®, &val) != 2)
return -EINVAL;
if (g->ops.clk.pll_reg_write(g, reg, val))
err = g->ops.clk.pll_reg_write(g, reg, val);
else
err = -EINVAL;
return err;
}
static const struct file_operations pll_reg_raw_fops = {
.open = pll_reg_raw_open,
.read = seq_read,
.write = pll_reg_raw_write,
.llseek = seq_lseek,
.release = single_release,
};
static int monitor_get(void *data, u64 *val)
{
struct gk20a *g = (struct gk20a *)data;
int err = 0;
if (g->ops.clk.get_gpcclk_clock_counter)
err = g->ops.clk.get_gpcclk_clock_counter(&g->clk, val);
else
err = -EINVAL;
return err;
}
DEFINE_SIMPLE_ATTRIBUTE(monitor_fops, monitor_get, NULL, "%llu\n");
static int voltage_get(void *data, u64 *val)
{
struct gk20a *g = (struct gk20a *)data;
int err = 0;
if (g->ops.clk.get_voltage)
err = g->ops.clk.get_voltage(&g->clk, val);
else
err = -EINVAL;
return err;
}
DEFINE_SIMPLE_ATTRIBUTE(voltage_fops, voltage_get, NULL, "%llu\n");
static int pll_param_show(struct seq_file *s, void *data)
{
struct pll_parms *gpc_pll_params = gm20b_get_gpc_pll_parms();
seq_printf(s, "ADC offs = %d uV, ADC slope = %d uV, VCO ctrl = 0x%x\n",
gpc_pll_params->uvdet_offs, gpc_pll_params->uvdet_slope,
gpc_pll_params->vco_ctrl);
return 0;
}
static int pll_param_open(struct inode *inode, struct file *file)
{
return single_open(file, pll_param_show, inode->i_private);
}
static const struct file_operations pll_param_fops = {
.open = pll_param_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int gm20b_clk_init_debugfs(struct gk20a *g)
{
struct dentry *d;
struct gk20a_platform *platform = dev_get_drvdata(g->dev);
if (!platform->debugfs)
return -EINVAL;
d = debugfs_create_file(
"rate", S_IRUGO|S_IWUSR, platform->debugfs, g, &rate_fops);
if (!d)
goto err_out;
d = debugfs_create_file(
"pll_reg", S_IRUGO, platform->debugfs, g, &pll_reg_fops);
if (!d)
goto err_out;
d = debugfs_create_file("pll_reg_raw",
S_IRUGO, platform->debugfs, g, &pll_reg_raw_fops);
if (!d)
goto err_out;
d = debugfs_create_file(
"monitor", S_IRUGO, platform->debugfs, g, &monitor_fops);
if (!d)
goto err_out;
d = debugfs_create_file(
"voltage", S_IRUGO, platform->debugfs, g, &voltage_fops);
if (!d)
goto err_out;
d = debugfs_create_file(
"pll_param", S_IRUGO, platform->debugfs, g, &pll_param_fops);
if (!d)
goto err_out;
d = debugfs_create_u32("pll_na_mode", S_IRUGO, platform->debugfs,
(u32 *)&g->clk.gpc_pll.mode);
if (!d)
goto err_out;
d = debugfs_create_u32("fmax2x_at_vmin_safe_t", S_IRUGO,
platform->debugfs, (u32 *)&g->clk.dvfs_safe_max_freq);
if (!d)
goto err_out;
return 0;
err_out:
pr_err("%s: Failed to make debugfs node\n", __func__);
debugfs_remove_recursive(platform->debugfs);
return -ENOMEM;
}
