| // SPDX-License-Identifier: (GPL-2.0+ OR MIT) |
| /* |
| * Copyright (c) 2019 Amlogic, Inc. All rights reserved. |
| */ |
| |
| #include <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/printk.h> |
| #include <linux/interrupt.h> |
| #include <linux/platform_device.h> |
| #include <linux/sysfs.h> |
| #include <linux/of.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include "ddr_bandwidth.h" |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| |
| #undef pr_fmt |
| #define pr_fmt(fmt) "ddr_tool: " fmt |
| |
| static void gxl_dmc_port_config(struct ddr_bandwidth *db, int channel, int port) |
| { |
| unsigned int val; |
| unsigned int port_reg[MAX_CHANNEL] = {DMC_MON_CTRL1, DMC_MON_CTRL4, |
| DMC_MON_CTRL5, DMC_MON_CTRL6}; |
| int subport = -1; |
| |
| if (port >= PORT_MAJOR) |
| subport = port - PORT_MAJOR; |
| |
| /* clear all port mask */ |
| if (port < 0) { |
| writel(0, db->ddr_reg1 + port_reg[channel]); |
| return; |
| } |
| |
| val = readl(db->ddr_reg1 + port_reg[channel]); |
| if (port < 16) { |
| val |= ((1 << (16 + port)) | 0xffff); |
| } else if (subport > 0) { |
| val &= ~(0xffffffff); |
| val |= (1 << 23) | (1 << subport); |
| } else { |
| pr_err("port config fail, %s: %d\n", __func__, __LINE__); |
| return; |
| } |
| writel(val, db->ddr_reg1 + port_reg[channel]); |
| } |
| |
| static unsigned long gxl_get_dmc_freq_quick(struct ddr_bandwidth *db) |
| { |
| unsigned int val; |
| unsigned int od, n, m, od1; |
| unsigned long freq = 0; |
| |
| val = readl(db->pll_reg); |
| od = (val >> 2) & 0x03; |
| m = (val >> 4) & 0x1ff; |
| n = (val >> 16) & 0x1f; |
| od1 = (val >> 0) & 0x03; |
| freq = DEFAULT_XTAL_FREQ / 1000; /* avoid overflow */ |
| freq = ((freq * m / (n * (1 + od))) >> od1) * 1000; |
| return freq; |
| } |
| |
| static void gxl_dmc_bandwidth_enable(struct ddr_bandwidth *db) |
| { |
| unsigned int val; |
| |
| /* enable all channel */ |
| val = (0x01 << 31) | /* enable bit */ |
| (0x01 << 20) | /* use timer */ |
| (0x0f << 0); |
| writel(val, db->ddr_reg1 + DMC_MON_CTRL2); |
| } |
| |
| static void gxl_dmc_bandwidth_init(struct ddr_bandwidth *db) |
| { |
| unsigned int i; |
| |
| /* set timer trigger clock_cnt */ |
| writel(db->clock_count, db->ddr_reg1 + DMC_MON_CTRL3); |
| gxl_dmc_bandwidth_enable(db); |
| |
| for (i = 0; i < db->channels; i++) { |
| if (!db->port[i]) |
| gxl_dmc_port_config(db, i, -1); |
| } |
| } |
| |
| static int gxl_handle_irq(struct ddr_bandwidth *db, struct ddr_grant *dg) |
| { |
| unsigned int reg, i, val; |
| int ret = -1; |
| |
| val = readl(db->ddr_reg1 + DMC_MON_CTRL2); |
| if (val & DMC_QOS_IRQ) { |
| /* |
| * get total bytes by each channel, each cycle 16 bytes; |
| */ |
| dg->all_grant = readl(db->ddr_reg1 + DMC_MON_ALL_GRANT_CNT) * 16; |
| dg->all_req = readl(db->ddr_reg1 + DMC_MON_ALL_REQ_CNT) * 16; |
| for (i = 0; i < db->channels; i++) { |
| reg = DMC_MON_ONE_GRANT_CNT + (i << 2); |
| dg->channel_grant[i] = readl(db->ddr_reg1 + reg) * 16; |
| } |
| /* clear irq flags */ |
| writel(val, db->ddr_reg1 + DMC_MON_CTRL2); |
| gxl_dmc_bandwidth_enable(db); |
| ret = 0; |
| } |
| return ret; |
| } |
| |
| #if DDR_BANDWIDTH_DEBUG |
| static int gxl_dump_reg(struct ddr_bandwidth *db, char *buf) |
| { |
| int s = 0; |
| unsigned int r; |
| |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL1); |
| s += sprintf(buf + s, "DMC_MON_CTRL1: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL2); |
| s += sprintf(buf + s, "DMC_MON_CTRL2: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL3); |
| s += sprintf(buf + s, "DMC_MON_CTRL3: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL4); |
| s += sprintf(buf + s, "DMC_MON_CTRL4: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL5); |
| s += sprintf(buf + s, "DMC_MON_CTRL5: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_CTRL6); |
| s += sprintf(buf + s, "DMC_MON_CTRL6: %08x\n", r); |
| |
| r = readl(db->ddr_reg1 + DMC_MON_ALL_REQ_CNT); |
| s += sprintf(buf + s, "DMC_MON_ALL_REQ_CNT: %08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_ALL_GRANT_CNT); |
| s += sprintf(buf + s, "DMC_MON_ALL_GRANT_CNT:%08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_ONE_GRANT_CNT); |
| s += sprintf(buf + s, "DMC_MON_ONE_GRANT_CNT:%08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_SEC_GRANT_CNT); |
| s += sprintf(buf + s, "DMC_MON_SEC_GRANT_CNT:%08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_THD_GRANT_CNT); |
| s += sprintf(buf + s, "DMC_MON_THD_GRANT_CNT:%08x\n", r); |
| r = readl(db->ddr_reg1 + DMC_MON_FOR_GRANT_CNT); |
| s += sprintf(buf + s, "DMC_MON_FOR_GRANT_CNT:%08x\n", r); |
| |
| return s; |
| } |
| #endif |
| |
| struct ddr_bandwidth_ops gxl_ddr_bw_ops = { |
| .init = gxl_dmc_bandwidth_init, |
| .config_port = gxl_dmc_port_config, |
| .get_freq = gxl_get_dmc_freq_quick, |
| .handle_irq = gxl_handle_irq, |
| .bandwidth_enable = gxl_dmc_bandwidth_enable, |
| #if DDR_BANDWIDTH_DEBUG |
| .dump_reg = gxl_dump_reg, |
| #endif |
| }; |