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remoteproc: qcom: Introduce Hexagon V5 based WCSS driver 

IPQ8074 has an integrated Hexagon dsp core q6v5 and a wireless lan
(Lithium) IP. An mdt type single image format is used for the
firmware. So the mdt_load function can be directly used to load
the firmware. Also add the relevant resets required for this core.

Acked-by: Rob Herring <robh@kernel.org> (bindings)
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
[bjorn: Rewrote as a separate driver, intead of extending q6v5_pil.c]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Sricharan R 2018-06-07 22:57:11 +05:30 committed by Bjorn Andersson
parent 7d674731f3
commit 3a3d4163e0
4 changed files with 623 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
View File

@ -8,6 +8,7 @@ on the Qualcomm Hexagon core.
Value type: <string>
Definition: must be one of:
"qcom,q6v5-pil",
"qcom,ipq8074-wcss-pil"
"qcom,msm8916-mss-pil",
"qcom,msm8974-mss-pil"
"qcom,msm8996-mss-pil"
@ -50,11 +51,15 @@ on the Qualcomm Hexagon core.
Usage: required
Value type: <phandle>
Definition: reference to the reset-controller for the modem sub-system
reference to the list of 3 reset-controllers for the
wcss sub-system
- reset-names:
Usage: required
Value type: <stringlist>
Definition: must be "mss_restart"
Definition: must be "mss_restart" for the modem sub-system
Definition: must be "wcss_aon_reset", "wcss_reset", "wcss_q6_reset"
for the wcss syb-system
- cx-supply:
- mss-supply:

15
drivers/remoteproc/Kconfig
View File

@ -123,6 +123,21 @@ config QCOM_Q6V5_PIL
Say y here to support the Qualcomm Peripherial Image Loader for the
Hexagon V5 based remote processors.
config QCOM_Q6V5_WCSS
tristate "Qualcomm Hexagon based WCSS Peripheral Image Loader"
depends on OF && ARCH_QCOM
depends on QCOM_SMEM
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
depends on QCOM_SYSMON || QCOM_SYSMON=n
select MFD_SYSCON
select QCOM_MDT_LOADER
select QCOM_Q6V5_COMMON
select QCOM_RPROC_COMMON
select QCOM_SCM
help
Say y here to support the Qualcomm Peripheral Image Loader for the
Hexagon V5 based WCSS remote processors.
config QCOM_SYSMON
tristate "Qualcomm sysmon driver"
depends on RPMSG

1
drivers/remoteproc/Makefile
View File

@ -18,6 +18,7 @@ obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_Q6V5_WCSS) += qcom_q6v5_wcss.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
qcom_wcnss_pil-y += qcom_wcnss.o

601
drivers/remoteproc/qcom_q6v5_wcss.c Normal file
View File

@ -0,0 +1,601 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2016-2018 Linaro Ltd.
* Copyright (C) 2014 Sony Mobile Communications AB
* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
*/
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "qcom_common.h"
#include "qcom_q6v5.h"
#define WCSS_CRASH_REASON 421
/* Q6SS Register Offsets */
#define Q6SS_RESET_REG 0x014
#define Q6SS_GFMUX_CTL_REG 0x020
#define Q6SS_PWR_CTL_REG 0x030
#define Q6SS_MEM_PWR_CTL 0x0B0
/* AXI Halt Register Offsets */
#define AXI_HALTREQ_REG 0x0
#define AXI_HALTACK_REG 0x4
#define AXI_IDLE_REG 0x8
#define HALT_ACK_TIMEOUT_MS 100
/* Q6SS_RESET */
#define Q6SS_STOP_CORE BIT(0)
#define Q6SS_CORE_ARES BIT(1)
#define Q6SS_BUS_ARES_ENABLE BIT(2)
/* Q6SS_GFMUX_CTL */
#define Q6SS_CLK_ENABLE BIT(1)
/* Q6SS_PWR_CTL */
#define Q6SS_L2DATA_STBY_N BIT(18)
#define Q6SS_SLP_RET_N BIT(19)
#define Q6SS_CLAMP_IO BIT(20)
#define QDSS_BHS_ON BIT(21)
/* Q6SS parameters */
#define Q6SS_LDO_BYP BIT(25)
#define Q6SS_BHS_ON BIT(24)
#define Q6SS_CLAMP_WL BIT(21)
#define Q6SS_CLAMP_QMC_MEM BIT(22)
#define HALT_CHECK_MAX_LOOPS 200
#define Q6SS_XO_CBCR GENMASK(5, 3)
/* Q6SS config/status registers */
#define TCSR_GLOBAL_CFG0 0x0
#define TCSR_GLOBAL_CFG1 0x4
#define SSCAON_CONFIG 0x8
#define SSCAON_STATUS 0xc
#define Q6SS_BHS_STATUS 0x78
#define Q6SS_RST_EVB 0x10
#define BHS_EN_REST_ACK BIT(0)
#define SSCAON_ENABLE BIT(13)
#define SSCAON_BUS_EN BIT(15)
#define SSCAON_BUS_MUX_MASK GENMASK(18, 16)
#define MEM_BANKS 19
#define TCSR_WCSS_CLK_MASK 0x1F
#define TCSR_WCSS_CLK_ENABLE 0x14
struct q6v5_wcss {
struct device *dev;
void __iomem *reg_base;
void __iomem *rmb_base;
struct regmap *halt_map;
u32 halt_q6;
u32 halt_wcss;
u32 halt_nc;
struct reset_control *wcss_aon_reset;
struct reset_control *wcss_reset;
struct reset_control *wcss_q6_reset;
struct qcom_q6v5 q6v5;
phys_addr_t mem_phys;
phys_addr_t mem_reloc;
void *mem_region;
size_t mem_size;
};
static int q6v5_wcss_reset(struct q6v5_wcss *wcss)
{
int ret;
u32 val;
int i;
/* Assert resets, stop core */
val = readl(wcss->reg_base + Q6SS_RESET_REG);
val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
writel(val, wcss->reg_base + Q6SS_RESET_REG);
/* BHS require xo cbcr to be enabled */
val = readl(wcss->reg_base + Q6SS_XO_CBCR);
val |= 0x1;
writel(val, wcss->reg_base + Q6SS_XO_CBCR);
/* Read CLKOFF bit to go low indicating CLK is enabled */
ret = readl_poll_timeout(wcss->reg_base + Q6SS_XO_CBCR,
val, !(val & BIT(31)), 1,
HALT_CHECK_MAX_LOOPS);
if (ret) {
dev_err(wcss->dev,
"xo cbcr enabling timed out (rc:%d)\n", ret);
return ret;
}
/* Enable power block headswitch and wait for it to stabilize */
val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
val |= Q6SS_BHS_ON;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
udelay(1);
/* Put LDO in bypass mode */
val |= Q6SS_LDO_BYP;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* Deassert Q6 compiler memory clamp */
val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
val &= ~Q6SS_CLAMP_QMC_MEM;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* Deassert memory peripheral sleep and L2 memory standby */
val |= Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* Turn on L1, L2, ETB and JU memories 1 at a time */
val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
for (i = MEM_BANKS; i >= 0; i--) {
val |= BIT(i);
writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
/*
* Read back value to ensure the write is done then
* wait for 1us for both memory peripheral and data
* array to turn on.
*/
val |= readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
udelay(1);
}
/* Remove word line clamp */
val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
val &= ~Q6SS_CLAMP_WL;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* Remove IO clamp */
val &= ~Q6SS_CLAMP_IO;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* Bring core out of reset */
val = readl(wcss->reg_base + Q6SS_RESET_REG);
val &= ~Q6SS_CORE_ARES;
writel(val, wcss->reg_base + Q6SS_RESET_REG);
/* Turn on core clock */
val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
val |= Q6SS_CLK_ENABLE;
writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
/* Start core execution */
val = readl(wcss->reg_base + Q6SS_RESET_REG);
val &= ~Q6SS_STOP_CORE;
writel(val, wcss->reg_base + Q6SS_RESET_REG);
return 0;
}
static int q6v5_wcss_start(struct rproc *rproc)
{
struct q6v5_wcss *wcss = rproc->priv;
int ret;
qcom_q6v5_prepare(&wcss->q6v5);
/* Release Q6 and WCSS reset */
ret = reset_control_deassert(wcss->wcss_reset);
if (ret) {
dev_err(wcss->dev, "wcss_reset failed\n");
return ret;
}
ret = reset_control_deassert(wcss->wcss_q6_reset);
if (ret) {
dev_err(wcss->dev, "wcss_q6_reset failed\n");
goto wcss_reset;
}
/* Lithium configuration - clock gating and bus arbitration */
ret = regmap_update_bits(wcss->halt_map,
wcss->halt_nc + TCSR_GLOBAL_CFG0,
TCSR_WCSS_CLK_MASK,
TCSR_WCSS_CLK_ENABLE);
if (ret)
goto wcss_q6_reset;
ret = regmap_update_bits(wcss->halt_map,
wcss->halt_nc + TCSR_GLOBAL_CFG1,
1, 0);
if (ret)
goto wcss_q6_reset;
/* Write bootaddr to EVB so that Q6WCSS will jump there after reset */
writel(rproc->bootaddr >> 4, wcss->reg_base + Q6SS_RST_EVB);
ret = q6v5_wcss_reset(wcss);
if (ret)
goto wcss_q6_reset;
ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ);
if (ret == -ETIMEDOUT)
dev_err(wcss->dev, "start timed out\n");
return ret;
wcss_q6_reset:
reset_control_assert(wcss->wcss_q6_reset);
wcss_reset:
reset_control_assert(wcss->wcss_reset);
return ret;
}
static void q6v5_wcss_halt_axi_port(struct q6v5_wcss *wcss,
struct regmap *halt_map,
u32 offset)
{
unsigned long timeout;
unsigned int val;
int ret;
/* Check if we're already idle */
ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
if (!ret && val)
return;
/* Assert halt request */
regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);
/* Wait for halt */
timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
for (;;) {
ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
if (ret || val || time_after(jiffies, timeout))
break;
msleep(1);
}
ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
if (ret || !val)
dev_err(wcss->dev, "port failed halt\n");
/* Clear halt request (port will remain halted until reset) */
regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
}
static int q6v5_wcss_powerdown(struct q6v5_wcss *wcss)
{
int ret;
u32 val;
/* 1 - Assert WCSS/Q6 HALTREQ */
q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_wcss);
/* 2 - Enable WCSSAON_CONFIG */
val = readl(wcss->rmb_base + SSCAON_CONFIG);
val |= SSCAON_ENABLE;
writel(val, wcss->rmb_base + SSCAON_CONFIG);
/* 3 - Set SSCAON_CONFIG */
val |= SSCAON_BUS_EN;
val &= ~SSCAON_BUS_MUX_MASK;
writel(val, wcss->rmb_base + SSCAON_CONFIG);
/* 4 - SSCAON_CONFIG 1 */
val |= BIT(1);
writel(val, wcss->rmb_base + SSCAON_CONFIG);
/* 5 - wait for SSCAON_STATUS */
ret = readl_poll_timeout(wcss->rmb_base + SSCAON_STATUS,
val, (val & 0xffff) == 0x400, 1000,
HALT_CHECK_MAX_LOOPS);
if (ret) {
dev_err(wcss->dev,
"can't get SSCAON_STATUS rc:%d)\n", ret);
return ret;
}
/* 6 - De-assert WCSS_AON reset */
reset_control_assert(wcss->wcss_aon_reset);
/* 7 - Disable WCSSAON_CONFIG 13 */
val = readl(wcss->rmb_base + SSCAON_CONFIG);
val &= ~SSCAON_ENABLE;
writel(val, wcss->rmb_base + SSCAON_CONFIG);
/* 8 - De-assert WCSS/Q6 HALTREQ */
reset_control_assert(wcss->wcss_reset);
return 0;
}
static int q6v5_q6_powerdown(struct q6v5_wcss *wcss)
{
int ret;
u32 val;
int i;
/* 1 - Halt Q6 bus interface */
q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_q6);
/* 2 - Disable Q6 Core clock */
val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
val &= ~Q6SS_CLK_ENABLE;
writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
/* 3 - Clamp I/O */
val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
val |= Q6SS_CLAMP_IO;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* 4 - Clamp WL */
val |= QDSS_BHS_ON;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* 5 - Clear Erase standby */
val &= ~Q6SS_L2DATA_STBY_N;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* 6 - Clear Sleep RTN */
val &= ~Q6SS_SLP_RET_N;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* 7 - turn off Q6 memory foot/head switch one bank at a time */
for (i = 0; i < 20; i++) {
val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
val &= ~BIT(i);
writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
mdelay(1);
}
/* 8 - Assert QMC memory RTN */
val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
val |= Q6SS_CLAMP_QMC_MEM;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
/* 9 - Turn off BHS */
val &= ~Q6SS_BHS_ON;
writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
udelay(1);
/* 10 - Wait till BHS Reset is done */
ret = readl_poll_timeout(wcss->reg_base + Q6SS_BHS_STATUS,
val, !(val & BHS_EN_REST_ACK), 1000,
HALT_CHECK_MAX_LOOPS);
if (ret) {
dev_err(wcss->dev, "BHS_STATUS not OFF (rc:%d)\n", ret);
return ret;
}
/* 11 - Assert WCSS reset */
reset_control_assert(wcss->wcss_reset);
/* 12 - Assert Q6 reset */
reset_control_assert(wcss->wcss_q6_reset);
return 0;
}
static int q6v5_wcss_stop(struct rproc *rproc)
{
struct q6v5_wcss *wcss = rproc->priv;
int ret;
/* WCSS powerdown */
ret = qcom_q6v5_request_stop(&wcss->q6v5);
if (ret == -ETIMEDOUT) {
dev_err(wcss->dev, "timed out on wait\n");
return ret;
}
ret = q6v5_wcss_powerdown(wcss);
if (ret)
return ret;
/* Q6 Power down */
ret = q6v5_q6_powerdown(wcss);
if (ret)
return ret;
qcom_q6v5_unprepare(&wcss->q6v5);
return 0;
}
static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, int len)
{
struct q6v5_wcss *wcss = rproc->priv;
int offset;
offset = da - wcss->mem_reloc;
if (offset < 0 || offset + len > wcss->mem_size)
return NULL;
return wcss->mem_region + offset;
}
static int q6v5_wcss_load(struct rproc *rproc, const struct firmware *fw)
{
struct q6v5_wcss *wcss = rproc->priv;
return qcom_mdt_load_no_init(wcss->dev, fw, rproc->firmware,
0, wcss->mem_region, wcss->mem_phys,
wcss->mem_size, &wcss->mem_reloc);
}
static const struct rproc_ops q6v5_wcss_ops = {
.start = q6v5_wcss_start,
.stop = q6v5_wcss_stop,
.da_to_va = q6v5_wcss_da_to_va,
.load = q6v5_wcss_load,
.get_boot_addr = rproc_elf_get_boot_addr,
};
static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss)
{
struct device *dev = wcss->dev;
wcss->wcss_aon_reset = devm_reset_control_get(dev, "wcss_aon_reset");
if (IS_ERR(wcss->wcss_aon_reset)) {
dev_err(wcss->dev, "unable to acquire wcss_aon_reset\n");
return PTR_ERR(wcss->wcss_aon_reset);
}
wcss->wcss_reset = devm_reset_control_get(dev, "wcss_reset");
if (IS_ERR(wcss->wcss_reset)) {
dev_err(wcss->dev, "unable to acquire wcss_reset\n");
return PTR_ERR(wcss->wcss_reset);
}
wcss->wcss_q6_reset = devm_reset_control_get(dev, "wcss_q6_reset");
if (IS_ERR(wcss->wcss_q6_reset)) {
dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
return PTR_ERR(wcss->wcss_q6_reset);
}
return 0;
}
static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
struct platform_device *pdev)
{
struct of_phandle_args args;
struct resource *res;
int ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
wcss->reg_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(wcss->reg_base))
return PTR_ERR(wcss->reg_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
wcss->rmb_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(wcss->rmb_base))
return PTR_ERR(wcss->rmb_base);
ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
"qcom,halt-regs", 3, 0, &args);
if (ret < 0) {
dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
return -EINVAL;
}
wcss->halt_map = syscon_node_to_regmap(args.np);
of_node_put(args.np);
if (IS_ERR(wcss->halt_map))
return PTR_ERR(wcss->halt_map);
wcss->halt_q6 = args.args[0];
wcss->halt_wcss = args.args[1];
wcss->halt_nc = args.args[2];
return 0;
}
static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
{
struct reserved_mem *rmem = NULL;
struct device_node *node;
struct device *dev = wcss->dev;
node = of_parse_phandle(dev->of_node, "memory-region", 0);
if (node)
rmem = of_reserved_mem_lookup(node);
of_node_put(node);
if (!rmem) {
dev_err(dev, "unable to acquire memory-region\n");
return -EINVAL;
}
wcss->mem_phys = rmem->base;
wcss->mem_reloc = rmem->base;
wcss->mem_size = rmem->size;
wcss->mem_region = devm_ioremap_wc(dev, wcss->mem_phys, wcss->mem_size);
if (!wcss->mem_region) {
dev_err(dev, "unable to map memory region: %pa+%pa\n",
&rmem->base, &rmem->size);
return -EBUSY;
}
return 0;
}
static int q6v5_wcss_probe(struct platform_device *pdev)
{
struct q6v5_wcss *wcss;
struct rproc *rproc;
int ret;
rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_wcss_ops,
"IPQ8074/q6_fw.mdt", sizeof(*wcss));
if (!rproc) {
dev_err(&pdev->dev, "failed to allocate rproc\n");
return -ENOMEM;
}
wcss = rproc->priv;
wcss->dev = &pdev->dev;
ret = q6v5_wcss_init_mmio(wcss, pdev);
if (ret)
goto free_rproc;
ret = q6v5_alloc_memory_region(wcss);
if (ret)
goto free_rproc;
ret = q6v5_wcss_init_reset(wcss);
if (ret)
goto free_rproc;
ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, WCSS_CRASH_REASON, NULL);
if (ret)
goto free_rproc;
ret = rproc_add(rproc);
if (ret)
goto free_rproc;
platform_set_drvdata(pdev, rproc);
return 0;
free_rproc:
rproc_free(rproc);
return ret;
}
static int q6v5_wcss_remove(struct platform_device *pdev)
{
struct rproc *rproc = platform_get_drvdata(pdev);
rproc_del(rproc);
rproc_free(rproc);
return 0;
}
static const struct of_device_id q6v5_wcss_of_match[] = {
{ .compatible = "qcom,ipq8074-wcss-pil" },
{ },
};
MODULE_DEVICE_TABLE(of, q6v5_wcss_of_match);
static struct platform_driver q6v5_wcss_driver = {
.probe = q6v5_wcss_probe,
.remove = q6v5_wcss_remove,
.driver = {
.name = "qcom-q6v5-wcss-pil",
.of_match_table = q6v5_wcss_of_match,
},
};
module_platform_driver(q6v5_wcss_driver);
MODULE_DESCRIPTION("Hexagon WCSS Peripheral Image Loader");
MODULE_LICENSE("GPL v2");