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This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes 

for 5.3, please pull the following:
 
 - Markus provides a set of updates to the DPFE driver to support a new
   revision of the API to the firmware (version 3) and provides minor fixes
   about how the MR4-8 words are read for LPDDR4 devices
 
 - Florian removes a print of a virtual address in brcmstb_gisb.c
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Merge tag 'arm-soc/for-5.3/drivers' of https://github.com/Broadcom/stblinux into arm/drivers

This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes
for 5.3, please pull the following:

- Markus provides a set of updates to the DPFE driver to support a new
  revision of the API to the firmware (version 3) and provides minor fixes
  about how the MR4-8 words are read for LPDDR4 devices

- Florian removes a print of a virtual address in brcmstb_gisb.c

* tag 'arm-soc/for-5.3/drivers' of https://github.com/Broadcom/stblinux:
  memory: brcmstb: dpfe: introduce DPFE API v3
  memory: brcmstb: dpfe: prepare for API-dependent sysfs attributes
  memory: brcmstb: dpfe: prepare support for multiple API versions
  memory: brcmstb: dpfe: wait for DCPU to be ready
  memory: brcmstb: dpfe: report firmware loading error
  memory: brcmstb: dpfe: remove unused code and fix formatting
  bus: brcmstb_gisb: Remove print of base address
  memory: brcmstb: dpfe: use byte 3 of registers MR4-MR8
  memory: brcmstb: dpfe: optimize generic_show()
  memory: brcmstb: dpfe: use msleep() over udelay()

Signed-off-by: Olof Johansson <olof@lixom.net>
alistair/sunxi64-5.4-dsi
Olof Johansson 2019-06-17 04:52:52 -07:00
parent 92e074acf6 e3b7472362
commit 426356392c
2 changed files with 243 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/bus/brcmstb_gisb.c
View File

@ -399,8 +399,8 @@ static int __init brcmstb_gisb_arb_probe(struct platform_device *pdev)
&gisb_panic_notifier);
}
dev_info(&pdev->dev, "registered mem: %p, irqs: %d, %d\n",
gdev->base, timeout_irq, tea_irq);
dev_info(&pdev->dev, "registered irqs: %d, %d\n",
timeout_irq, tea_irq);
return 0;
}

323
drivers/memory/brcmstb_dpfe.c
View File

@ -35,10 +35,10 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#define DRVNAME "brcmstb-dpfe"
#define FIRMWARE_NAME "dpfe.bin"
/* DCPU register offsets */
#define REG_DCPU_RESET 0x0
@ -61,6 +61,7 @@
#define DRAM_INFO_MR4 0x4
#define DRAM_INFO_ERROR 0x8
#define DRAM_INFO_MR4_MASK 0xff
#define DRAM_INFO_MR4_SHIFT 24 /* We need to look at byte 3 */
/* DRAM MR4 Offsets & Masks */
#define DRAM_MR4_REFRESH 0x0 /* Refresh rate */
@ -75,13 +76,23 @@
#define DRAM_MR4_TH_OFFS_MASK 0x3
#define DRAM_MR4_TUF_MASK 0x1
/* DRAM Vendor Offsets & Masks */
/* DRAM Vendor Offsets & Masks (API v2) */
#define DRAM_VENDOR_MR5 0x0
#define DRAM_VENDOR_MR6 0x4
#define DRAM_VENDOR_MR7 0x8
#define DRAM_VENDOR_MR8 0xc
#define DRAM_VENDOR_ERROR 0x10
#define DRAM_VENDOR_MASK 0xff
#define DRAM_VENDOR_SHIFT 24 /* We need to look at byte 3 */
/* DRAM Information Offsets & Masks (API v3) */
#define DRAM_DDR_INFO_MR4 0x0
#define DRAM_DDR_INFO_MR5 0x4
#define DRAM_DDR_INFO_MR6 0x8
#define DRAM_DDR_INFO_MR7 0xc
#define DRAM_DDR_INFO_MR8 0x10
#define DRAM_DDR_INFO_ERROR 0x14
#define DRAM_DDR_INFO_MASK 0xff
/* Reset register bits & masks */
#define DCPU_RESET_SHIFT 0x0
@ -111,7 +122,7 @@
#define DPFE_MSG_TYPE_COMMAND 1
#define DPFE_MSG_TYPE_RESPONSE 2
#define DELAY_LOOP_MAX 200000
#define DELAY_LOOP_MAX 1000
enum dpfe_msg_fields {
MSG_HEADER,
@ -119,7 +130,7 @@ enum dpfe_msg_fields {
MSG_ARG_COUNT,
MSG_ARG0,
MSG_CHKSUM,
MSG_FIELD_MAX /* Last entry */
MSG_FIELD_MAX = 16 /* Max number of arguments */
};
enum dpfe_commands {
@ -129,14 +140,6 @@ enum dpfe_commands {
DPFE_CMD_MAX /* Last entry */
};
struct dpfe_msg {
u32 header;
u32 command;
u32 arg_count;
u32 arg0;
u32 chksum; /* This is the sum of all other entries. */
};
/*
* Format of the binary firmware file:
*
@ -170,12 +173,21 @@ struct init_data {
bool is_big_endian;
};
/* API version and corresponding commands */
struct dpfe_api {
int version;
const char *fw_name;
const struct attribute_group **sysfs_attrs;
u32 command[DPFE_CMD_MAX][MSG_FIELD_MAX];
};
/* Things we need for as long as we are active. */
struct private_data {
void __iomem *regs;
void __iomem *dmem;
void __iomem *imem;
struct device *dev;
const struct dpfe_api *dpfe_api;
struct mutex lock;
};
@ -184,28 +196,99 @@ static const char *error_text[] = {
"Incorrect checksum", "Malformed command", "Timed out",
};
/* List of supported firmware commands */
static const u32 dpfe_commands[DPFE_CMD_MAX][MSG_FIELD_MAX] = {
[DPFE_CMD_GET_INFO] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 1,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 1,
[MSG_CHKSUM] = 4,
},
[DPFE_CMD_GET_REFRESH] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 2,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 1,
[MSG_CHKSUM] = 5,
},
[DPFE_CMD_GET_VENDOR] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 2,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 2,
[MSG_CHKSUM] = 6,
/*
* Forward declaration of our sysfs attribute functions, so we can declare the
* attribute data structures early.
*/
static ssize_t show_info(struct device *, struct device_attribute *, char *);
static ssize_t show_refresh(struct device *, struct device_attribute *, char *);
static ssize_t store_refresh(struct device *, struct device_attribute *,
const char *, size_t);
static ssize_t show_vendor(struct device *, struct device_attribute *, char *);
static ssize_t show_dram(struct device *, struct device_attribute *, char *);
/*
* Declare our attributes early, so they can be referenced in the API data
* structure. We need to do this, because the attributes depend on the API
* version.
*/
static DEVICE_ATTR(dpfe_info, 0444, show_info, NULL);
static DEVICE_ATTR(dpfe_refresh, 0644, show_refresh, store_refresh);
static DEVICE_ATTR(dpfe_vendor, 0444, show_vendor, NULL);
static DEVICE_ATTR(dpfe_dram, 0444, show_dram, NULL);
/* API v2 sysfs attributes */
static struct attribute *dpfe_v2_attrs[] = {
&dev_attr_dpfe_info.attr,
&dev_attr_dpfe_refresh.attr,
&dev_attr_dpfe_vendor.attr,
NULL
};
ATTRIBUTE_GROUPS(dpfe_v2);
/* API v3 sysfs attributes */
static struct attribute *dpfe_v3_attrs[] = {
&dev_attr_dpfe_info.attr,
&dev_attr_dpfe_dram.attr,
NULL
};
ATTRIBUTE_GROUPS(dpfe_v3);
/* API v2 firmware commands */
static const struct dpfe_api dpfe_api_v2 = {
.version = 2,
.fw_name = "dpfe.bin",
.sysfs_attrs = dpfe_v2_groups,
.command = {
[DPFE_CMD_GET_INFO] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 1,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 1,
[MSG_CHKSUM] = 4,
},
[DPFE_CMD_GET_REFRESH] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 2,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 1,
[MSG_CHKSUM] = 5,
},
[DPFE_CMD_GET_VENDOR] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 2,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 2,
[MSG_CHKSUM] = 6,
},
}
};
/* API v3 firmware commands */
static const struct dpfe_api dpfe_api_v3 = {
.version = 3,
.fw_name = NULL, /* We expect the firmware to have been downloaded! */
.sysfs_attrs = dpfe_v3_groups,
.command = {
[DPFE_CMD_GET_INFO] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 0x0101,
[MSG_ARG_COUNT] = 1,
[MSG_ARG0] = 1,
[MSG_CHKSUM] = 0x104,
},
[DPFE_CMD_GET_REFRESH] = {
[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
[MSG_COMMAND] = 0x0202,
[MSG_ARG_COUNT] = 0,
/*
* This is a bit ugly. Without arguments, the checksum
* follows right after the argument count and not at
* offset MSG_CHKSUM.
*/
[MSG_ARG0] = 0x203,
},
/* There's no GET_VENDOR command in API v3. */
},
};
@ -250,13 +333,13 @@ static void __enable_dcpu(void __iomem *regs)
writel_relaxed(val, regs + REG_DCPU_RESET);
}
static unsigned int get_msg_chksum(const u32 msg[])
static unsigned int get_msg_chksum(const u32 msg[], unsigned int max)
{
unsigned int sum = 0;
unsigned int i;
/* Don't include the last field in the checksum. */
for (i = 0; i < MSG_FIELD_MAX - 1; i++)
for (i = 0; i < max; i++)
sum += msg[i];
return sum;
@ -269,6 +352,11 @@ static void __iomem *get_msg_ptr(struct private_data *priv, u32 response,
unsigned int offset;
void __iomem *ptr = NULL;
/* There is no need to use this function for API v3 or later. */
if (unlikely(priv->dpfe_api->version >= 3)) {
return NULL;
}
msg_type = (response >> DRAM_MSG_TYPE_OFFSET) & DRAM_MSG_TYPE_MASK;
offset = (response >> DRAM_MSG_ADDR_OFFSET) & DRAM_MSG_ADDR_MASK;
@ -296,12 +384,25 @@ static void __iomem *get_msg_ptr(struct private_data *priv, u32 response,
return ptr;
}
static void __finalize_command(struct private_data *priv)
{
unsigned int release_mbox;
/*
* It depends on the API version which MBOX register we have to write to
* to signal we are done.
*/
release_mbox = (priv->dpfe_api->version < 3)
? REG_TO_HOST_MBOX : REG_TO_DCPU_MBOX;
writel_relaxed(0, priv->regs + release_mbox);
}
static int __send_command(struct private_data *priv, unsigned int cmd,
u32 result[])
{
const u32 *msg = dpfe_commands[cmd];
const u32 *msg = priv->dpfe_api->command[cmd];
void __iomem *regs = priv->regs;
unsigned int i, chksum;
unsigned int i, chksum, chksum_idx;
int ret = 0;
u32 resp;
@ -310,6 +411,18 @@ static int __send_command(struct private_data *priv, unsigned int cmd,
mutex_lock(&priv->lock);
/* Wait for DCPU to become ready */
for (i = 0; i < DELAY_LOOP_MAX; i++) {
resp = readl_relaxed(regs + REG_TO_HOST_MBOX);
if (resp == 0)
break;
msleep(1);
}
if (resp != 0) {
mutex_unlock(&priv->lock);
return -ETIMEDOUT;
}
/* Write command and arguments to message area */
for (i = 0; i < MSG_FIELD_MAX; i++)
writel_relaxed(msg[i], regs + DCPU_MSG_RAM(i));
@ -323,7 +436,7 @@ static int __send_command(struct private_data *priv, unsigned int cmd,
resp = readl_relaxed(regs + REG_TO_HOST_MBOX);
if (resp > 0)
break;
udelay(5);
msleep(1);
}
if (i == DELAY_LOOP_MAX) {
@ -333,10 +446,11 @@ static int __send_command(struct private_data *priv, unsigned int cmd,
/* Read response data */
for (i = 0; i < MSG_FIELD_MAX; i++)
result[i] = readl_relaxed(regs + DCPU_MSG_RAM(i));
chksum_idx = result[MSG_ARG_COUNT] + MSG_ARG_COUNT + 1;
}
/* Tell DCPU we are done */
writel_relaxed(0, regs + REG_TO_HOST_MBOX);
__finalize_command(priv);
mutex_unlock(&priv->lock);
@ -344,8 +458,8 @@ static int __send_command(struct private_data *priv, unsigned int cmd,
return ret;
/* Verify response */
chksum = get_msg_chksum(result);
if (chksum != result[MSG_CHKSUM])
chksum = get_msg_chksum(result, chksum_idx);
if (chksum != result[chksum_idx])
resp = DCPU_RET_ERR_CHKSUM;
if (resp != DCPU_RET_SUCCESS) {
@ -486,7 +600,15 @@ static int brcmstb_dpfe_download_firmware(struct platform_device *pdev,
return 0;
}
ret = request_firmware(&fw, FIRMWARE_NAME, dev);
/*
* If the firmware filename is NULL it means the boot firmware has to
* download the DCPU firmware for us. If that didn't work, we have to
* bail, since downloading it ourselves wouldn't work either.
*/
if (!priv->dpfe_api->fw_name)
return -ENODEV;
ret = request_firmware(&fw, priv->dpfe_api->fw_name, dev);
/* request_firmware() prints its own error messages. */
if (ret)
return ret;
@ -527,12 +649,10 @@ static int brcmstb_dpfe_download_firmware(struct platform_device *pdev,
}
static ssize_t generic_show(unsigned int command, u32 response[],
struct device *dev, char *buf)
struct private_data *priv, char *buf)
{
struct private_data *priv;
int ret;
priv = dev_get_drvdata(dev);
if (!priv)
return sprintf(buf, "ERROR: driver private data not set\n");
@ -547,10 +667,12 @@ static ssize_t show_info(struct device *dev, struct device_attribute *devattr,
char *buf)
{
u32 response[MSG_FIELD_MAX];
struct private_data *priv;
unsigned int info;
ssize_t ret;
ret = generic_show(DPFE_CMD_GET_INFO, response, dev, buf);
priv = dev_get_drvdata(dev);
ret = generic_show(DPFE_CMD_GET_INFO, response, priv, buf);
if (ret)
return ret;
@ -573,17 +695,17 @@ static ssize_t show_refresh(struct device *dev,
u32 mr4;
ssize_t ret;
ret = generic_show(DPFE_CMD_GET_REFRESH, response, dev, buf);
priv = dev_get_drvdata(dev);
ret = generic_show(DPFE_CMD_GET_REFRESH, response, priv, buf);
if (ret)
return ret;
priv = dev_get_drvdata(dev);
info = get_msg_ptr(priv, response[MSG_ARG0], buf, &ret);
if (!info)
return ret;
mr4 = readl_relaxed(info + DRAM_INFO_MR4) & DRAM_INFO_MR4_MASK;
mr4 = (readl_relaxed(info + DRAM_INFO_MR4) >> DRAM_INFO_MR4_SHIFT) &
DRAM_INFO_MR4_MASK;
refresh = (mr4 >> DRAM_MR4_REFRESH) & DRAM_MR4_REFRESH_MASK;
sr_abort = (mr4 >> DRAM_MR4_SR_ABORT) & DRAM_MR4_SR_ABORT_MASK;
@ -610,7 +732,6 @@ static ssize_t store_refresh(struct device *dev, struct device_attribute *attr,
return -EINVAL;
priv = dev_get_drvdata(dev);
ret = __send_command(priv, DPFE_CMD_GET_REFRESH, response);
if (ret)
return ret;
@ -625,30 +746,58 @@ static ssize_t store_refresh(struct device *dev, struct device_attribute *attr,
}
static ssize_t show_vendor(struct device *dev, struct device_attribute *devattr,
char *buf)
char *buf)
{
u32 response[MSG_FIELD_MAX];
struct private_data *priv;
void __iomem *info;
ssize_t ret;
ret = generic_show(DPFE_CMD_GET_VENDOR, response, dev, buf);
if (ret)
return ret;
u32 mr5, mr6, mr7, mr8, err;
priv = dev_get_drvdata(dev);
ret = generic_show(DPFE_CMD_GET_VENDOR, response, priv, buf);
if (ret)
return ret;
info = get_msg_ptr(priv, response[MSG_ARG0], buf, &ret);
if (!info)
return ret;
return sprintf(buf, "%#x %#x %#x %#x %#x\n",
readl_relaxed(info + DRAM_VENDOR_MR5) & DRAM_VENDOR_MASK,
readl_relaxed(info + DRAM_VENDOR_MR6) & DRAM_VENDOR_MASK,
readl_relaxed(info + DRAM_VENDOR_MR7) & DRAM_VENDOR_MASK,
readl_relaxed(info + DRAM_VENDOR_MR8) & DRAM_VENDOR_MASK,
readl_relaxed(info + DRAM_VENDOR_ERROR) &
DRAM_VENDOR_MASK);
mr5 = (readl_relaxed(info + DRAM_VENDOR_MR5) >> DRAM_VENDOR_SHIFT) &
DRAM_VENDOR_MASK;
mr6 = (readl_relaxed(info + DRAM_VENDOR_MR6) >> DRAM_VENDOR_SHIFT) &
DRAM_VENDOR_MASK;
mr7 = (readl_relaxed(info + DRAM_VENDOR_MR7) >> DRAM_VENDOR_SHIFT) &
DRAM_VENDOR_MASK;
mr8 = (readl_relaxed(info + DRAM_VENDOR_MR8) >> DRAM_VENDOR_SHIFT) &
DRAM_VENDOR_MASK;
err = readl_relaxed(info + DRAM_VENDOR_ERROR) & DRAM_VENDOR_MASK;
return sprintf(buf, "%#x %#x %#x %#x %#x\n", mr5, mr6, mr7, mr8, err);
}
static ssize_t show_dram(struct device *dev, struct device_attribute *devattr,
char *buf)
{
u32 response[MSG_FIELD_MAX];
struct private_data *priv;
ssize_t ret;
u32 mr4, mr5, mr6, mr7, mr8, err;
priv = dev_get_drvdata(dev);
ret = generic_show(DPFE_CMD_GET_REFRESH, response, priv, buf);
if (ret)
return ret;
mr4 = response[MSG_ARG0 + 0] & DRAM_INFO_MR4_MASK;
mr5 = response[MSG_ARG0 + 1] & DRAM_DDR_INFO_MASK;
mr6 = response[MSG_ARG0 + 2] & DRAM_DDR_INFO_MASK;
mr7 = response[MSG_ARG0 + 3] & DRAM_DDR_INFO_MASK;
mr8 = response[MSG_ARG0 + 4] & DRAM_DDR_INFO_MASK;
err = response[MSG_ARG0 + 5] & DRAM_DDR_INFO_MASK;
return sprintf(buf, "%#x %#x %#x %#x %#x %#x\n", mr4, mr5, mr6, mr7,
mr8, err);
}
static int brcmstb_dpfe_resume(struct platform_device *pdev)
@ -658,17 +807,6 @@ static int brcmstb_dpfe_resume(struct platform_device *pdev)
return brcmstb_dpfe_download_firmware(pdev, &init);
}
static DEVICE_ATTR(dpfe_info, 0444, show_info, NULL);
static DEVICE_ATTR(dpfe_refresh, 0644, show_refresh, store_refresh);
static DEVICE_ATTR(dpfe_vendor, 0444, show_vendor, NULL);
static struct attribute *dpfe_attrs[] = {
&dev_attr_dpfe_info.attr,
&dev_attr_dpfe_refresh.attr,
&dev_attr_dpfe_vendor.attr,
NULL
};
ATTRIBUTE_GROUPS(dpfe);
static int brcmstb_dpfe_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -705,26 +843,47 @@ static int brcmstb_dpfe_probe(struct platform_device *pdev)
return -ENOENT;
}
ret = brcmstb_dpfe_download_firmware(pdev, &init);
if (ret)
return ret;
priv->dpfe_api = of_device_get_match_data(dev);
if (unlikely(!priv->dpfe_api)) {
/*
* It should be impossible to end up here, but to be safe we
* check anyway.
*/
dev_err(dev, "Couldn't determine API\n");
return -ENOENT;
}
ret = sysfs_create_groups(&pdev->dev.kobj, dpfe_groups);
ret = brcmstb_dpfe_download_firmware(pdev, &init);
if (ret) {
dev_err(dev, "Couldn't download firmware -- %d\n", ret);
return ret;
}
ret = sysfs_create_groups(&pdev->dev.kobj, priv->dpfe_api->sysfs_attrs);
if (!ret)
dev_info(dev, "registered.\n");
dev_info(dev, "registered with API v%d.\n",
priv->dpfe_api->version);
return ret;
}
static int brcmstb_dpfe_remove(struct platform_device *pdev)
{
sysfs_remove_groups(&pdev->dev.kobj, dpfe_groups);
struct private_data *priv = dev_get_drvdata(&pdev->dev);
sysfs_remove_groups(&pdev->dev.kobj, priv->dpfe_api->sysfs_attrs);
return 0;
}
static const struct of_device_id brcmstb_dpfe_of_match[] = {
{ .compatible = "brcm,dpfe-cpu", },
/* Use legacy API v2 for a select number of chips */
{ .compatible = "brcm,bcm7268-dpfe-cpu", .data = &dpfe_api_v2 },
{ .compatible = "brcm,bcm7271-dpfe-cpu", .data = &dpfe_api_v2 },
{ .compatible = "brcm,bcm7278-dpfe-cpu", .data = &dpfe_api_v2 },
{ .compatible = "brcm,bcm7211-dpfe-cpu", .data = &dpfe_api_v2 },
/* API v3 is the default going forward */
{ .compatible = "brcm,dpfe-cpu", .data = &dpfe_api_v3 },
{}
};
MODULE_DEVICE_TABLE(of, brcmstb_dpfe_of_match);