blob: 6b20b20cd32662b8fb217244e9817413e7ab1686 [file] [log] [blame]
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_coresight.h>
#include <linux/coresight.h>
#include "coresight-priv.h"
#define csr_writel(drvdata, val, off) __raw_writel((val), drvdata->base + off)
#define csr_readl(drvdata, off) __raw_readl(drvdata->base + off)
#define CSR_LOCK(drvdata) \
do { \
mb(); \
csr_writel(drvdata, 0x0, CORESIGHT_LAR); \
} while (0)
#define CSR_UNLOCK(drvdata) \
do { \
csr_writel(drvdata, CORESIGHT_UNLOCK, CORESIGHT_LAR); \
mb(); \
} while (0)
#define CSR_SWDBGPWRCTRL (0x000)
#define CSR_SWDBGPWRACK (0x004)
#define CSR_SWSPADREG0 (0x008)
#define CSR_SWSPADREG1 (0x00C)
#define CSR_STMTRANSCTRL (0x010)
#define CSR_STMAWIDCTRL (0x014)
#define CSR_STMCHNOFST0 (0x018)
#define CSR_STMCHNOFST1 (0x01C)
#define CSR_STMEXTHWCTRL0 (0x020)
#define CSR_STMEXTHWCTRL1 (0x024)
#define CSR_STMEXTHWCTRL2 (0x028)
#define CSR_STMEXTHWCTRL3 (0x02C)
#define CSR_USBBAMCTRL (0x030)
#define CSR_USBFLSHCTRL (0x034)
#define CSR_TIMESTAMPCTRL (0x038)
#define CSR_AOTIMEVAL0 (0x03C)
#define CSR_AOTIMEVAL1 (0x040)
#define CSR_QDSSTIMEVAL0 (0x044)
#define CSR_QDSSTIMEVAL1 (0x048)
#define CSR_QDSSTIMELOAD0 (0x04C)
#define CSR_QDSSTIMELOAD1 (0x050)
#define CSR_DAPMSAVAL (0x054)
#define CSR_QDSSCLKVOTE (0x058)
#define CSR_QDSSCLKIPI (0x05C)
#define CSR_QDSSPWRREQIGNORE (0x060)
#define CSR_QDSSSPARE (0x064)
#define CSR_IPCAT (0x068)
#define CSR_BYTECNTVAL (0x06C)
#define BLKSIZE_256 0
#define BLKSIZE_512 1
#define BLKSIZE_1024 2
#define BLKSIZE_2048 3
struct csr_drvdata {
void __iomem *base;
phys_addr_t pbase;
struct device *dev;
struct coresight_device *csdev;
uint32_t blksize;
};
static struct csr_drvdata *csrdrvdata;
void msm_qdss_csr_enable_bam_to_usb(void)
{
struct csr_drvdata *drvdata = csrdrvdata;
uint32_t usbbamctrl, usbflshctrl;
CSR_UNLOCK(drvdata);
usbbamctrl = csr_readl(drvdata, CSR_USBBAMCTRL);
usbbamctrl = (usbbamctrl & ~0x3) | drvdata->blksize;
csr_writel(drvdata, usbbamctrl, CSR_USBBAMCTRL);
usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);
usbflshctrl = (usbflshctrl & ~0x3FFFC) | (0xFFFF << 2);
csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);
usbflshctrl |= 0x2;
csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);
usbbamctrl |= 0x4;
csr_writel(drvdata, usbbamctrl, CSR_USBBAMCTRL);
CSR_LOCK(drvdata);
}
EXPORT_SYMBOL(msm_qdss_csr_enable_bam_to_usb);
void msm_qdss_csr_disable_bam_to_usb(void)
{
struct csr_drvdata *drvdata = csrdrvdata;
uint32_t usbbamctrl;
CSR_UNLOCK(drvdata);
usbbamctrl = csr_readl(drvdata, CSR_USBBAMCTRL);
usbbamctrl &= (~0x4);
csr_writel(drvdata, usbbamctrl, CSR_USBBAMCTRL);
CSR_LOCK(drvdata);
}
EXPORT_SYMBOL(msm_qdss_csr_disable_bam_to_usb);
void msm_qdss_csr_disable_flush(void)
{
struct csr_drvdata *drvdata = csrdrvdata;
uint32_t usbflshctrl;
CSR_UNLOCK(drvdata);
usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);
usbflshctrl &= ~0x2;
csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);
CSR_LOCK(drvdata);
}
EXPORT_SYMBOL(msm_qdss_csr_disable_flush);
int coresight_csr_hwctrl_set(uint64_t addr, uint32_t val)
{
struct csr_drvdata *drvdata = csrdrvdata;
int ret = 0;
CSR_UNLOCK(drvdata);
if (addr == (drvdata->pbase + CSR_STMEXTHWCTRL0))
csr_writel(drvdata, val, CSR_STMEXTHWCTRL0);
else if (addr == (drvdata->pbase + CSR_STMEXTHWCTRL1))
csr_writel(drvdata, val, CSR_STMEXTHWCTRL1);
else if (addr == (drvdata->pbase + CSR_STMEXTHWCTRL2))
csr_writel(drvdata, val, CSR_STMEXTHWCTRL2);
else if (addr == (drvdata->pbase + CSR_STMEXTHWCTRL3))
csr_writel(drvdata, val, CSR_STMEXTHWCTRL3);
else
ret = -EINVAL;
CSR_LOCK(drvdata);
return ret;
}
EXPORT_SYMBOL(coresight_csr_hwctrl_set);
void coresight_csr_set_byte_cntr(uint32_t count)
{
struct csr_drvdata *drvdata = csrdrvdata;
CSR_UNLOCK(drvdata);
csr_writel(drvdata, count, CSR_BYTECNTVAL);
mb();
CSR_LOCK(drvdata);
}
EXPORT_SYMBOL(coresight_csr_set_byte_cntr);
static int __devinit csr_probe(struct platform_device *pdev)
{
int ret;
struct device *dev = &pdev->dev;
struct coresight_platform_data *pdata;
struct csr_drvdata *drvdata;
struct resource *res;
struct coresight_desc *desc;
if (coresight_fuse_access_disabled())
return -EPERM;
if (pdev->dev.of_node) {
pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
pdev->dev.platform_data = pdata;
}
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
/* Store the driver data pointer for use in exported functions */
csrdrvdata = drvdata;
drvdata->dev = &pdev->dev;
platform_set_drvdata(pdev, drvdata);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csr-base");
if (!res)
return -ENODEV;
drvdata->pbase = res->start;
drvdata->base = devm_ioremap(dev, res->start, resource_size(res));
if (!drvdata->base)
return -ENOMEM;
if (pdev->dev.of_node) {
ret = of_property_read_u32(pdev->dev.of_node, "qcom,blk-size",
&drvdata->blksize);
if (ret)
drvdata->blksize = BLKSIZE_256;
}
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
desc->type = CORESIGHT_DEV_TYPE_NONE;
desc->pdata = pdev->dev.platform_data;
desc->dev = &pdev->dev;
desc->owner = THIS_MODULE;
drvdata->csdev = coresight_register(desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);
dev_info(dev, "CSR initialized\n");
return 0;
}
static int __devexit csr_remove(struct platform_device *pdev)
{
struct csr_drvdata *drvdata = platform_get_drvdata(pdev);
coresight_unregister(drvdata->csdev);
return 0;
}
static struct of_device_id csr_match[] = {
{.compatible = "qcom,coresight-csr"},
{}
};
static struct platform_driver csr_driver = {
.probe = csr_probe,
.remove = __devexit_p(csr_remove),
.driver = {
.name = "coresight-csr",
.owner = THIS_MODULE,
.of_match_table = csr_match,
},
};
static int __init csr_init(void)
{
return platform_driver_register(&csr_driver);
}
module_init(csr_init);
static void __exit csr_exit(void)
{
platform_driver_unregister(&csr_driver);
}
module_exit(csr_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("CoreSight CSR driver");