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-rw-r--r--drivers/ptp/ptp_ocp.c186
1 files changed, 121 insertions, 65 deletions
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index d2d663e439dc..433bd9d5d75c 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -11,12 +11,14 @@
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/platform_device.h>
+#include <linux/platform_data/i2c-xiic.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/spi/spi.h>
#include <linux/spi/xilinx_spi.h>
#include <net/devlink.h>
#include <linux/i2c.h>
#include <linux/mtd/mtd.h>
+#include <linux/nvmem-consumer.h>
#ifndef PCI_VENDOR_ID_FACEBOOK
#define PCI_VENDOR_ID_FACEBOOK 0x1d9b
@@ -204,6 +206,9 @@ struct ptp_ocp_ext_src {
int irq_vec;
};
+#define OCP_BOARD_ID_LEN 13
+#define OCP_SERIAL_LEN 6
+
struct ptp_ocp {
struct pci_dev *pdev;
struct device dev;
@@ -230,6 +235,7 @@ struct ptp_ocp {
struct platform_device *spi_flash;
struct clk_hw *i2c_clk;
struct timer_list watchdog;
+ const struct ptp_ocp_eeprom_map *eeprom_map;
struct dentry *debug_root;
time64_t gnss_lost;
int id;
@@ -238,8 +244,9 @@ struct ptp_ocp {
int gnss2_port;
int mac_port; /* miniature atomic clock */
int nmea_port;
- u8 serial[6];
- bool has_serial;
+ u8 board_id[OCP_BOARD_ID_LEN];
+ u8 serial[OCP_SERIAL_LEN];
+ bool has_eeprom_data;
u32 pps_req_map;
int flash_start;
u32 utc_tai_offset;
@@ -268,6 +275,28 @@ static int ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r);
static irqreturn_t ptp_ocp_ts_irq(int irq, void *priv);
static int ptp_ocp_ts_enable(void *priv, u32 req, bool enable);
+struct ptp_ocp_eeprom_map {
+ u16 off;
+ u16 len;
+ u32 bp_offset;
+ const void * const tag;
+};
+
+#define EEPROM_ENTRY(addr, member) \
+ .off = addr, \
+ .len = sizeof_field(struct ptp_ocp, member), \
+ .bp_offset = offsetof(struct ptp_ocp, member)
+
+#define BP_MAP_ENTRY_ADDR(bp, map) ({ \
+ (void *)((uintptr_t)(bp) + (map)->bp_offset); \
+})
+
+static struct ptp_ocp_eeprom_map fb_eeprom_map[] = {
+ { EEPROM_ENTRY(0x43, board_id) },
+ { EEPROM_ENTRY(0x00, serial), .tag = "mac" },
+ { }
+};
+
#define bp_assign_entry(bp, res, val) ({ \
uintptr_t addr = (uintptr_t)(bp) + (res)->bp_offset; \
*(typeof(val) *)addr = val; \
@@ -396,6 +425,15 @@ static struct ocp_resource ocp_fb_resource[] = {
.extra = &(struct ptp_ocp_i2c_info) {
.name = "xiic-i2c",
.fixed_rate = 50000000,
+ .data_size = sizeof(struct xiic_i2c_platform_data),
+ .data = &(struct xiic_i2c_platform_data) {
+ .num_devices = 2,
+ .devices = (struct i2c_board_info[]) {
+ { I2C_BOARD_INFO("24c02", 0x50) },
+ { I2C_BOARD_INFO("24mac402", 0x58),
+ .platform_data = "mac" },
+ },
+ },
},
},
{
@@ -919,78 +957,88 @@ ptp_ocp_tod_gnss_name(int idx)
return gnss_name[idx];
}
+struct ptp_ocp_nvmem_match_info {
+ struct ptp_ocp *bp;
+ const void * const tag;
+};
+
static int
-ptp_ocp_firstchild(struct device *dev, void *data)
+ptp_ocp_nvmem_match(struct device *dev, const void *data)
{
- return 1;
+ const struct ptp_ocp_nvmem_match_info *info = data;
+
+ dev = dev->parent;
+ if (!i2c_verify_client(dev) || info->tag != dev->platform_data)
+ return 0;
+
+ while ((dev = dev->parent))
+ if (dev->driver && !strcmp(dev->driver->name, KBUILD_MODNAME))
+ return info->bp == dev_get_drvdata(dev);
+ return 0;
}
-static int
-ptp_ocp_read_i2c(struct i2c_adapter *adap, u8 addr, u8 reg, u8 sz, u8 *data)
+static inline struct nvmem_device *
+ptp_ocp_nvmem_device_get(struct ptp_ocp *bp, const void * const tag)
{
- struct i2c_msg msgs[2] = {
- {
- .addr = addr,
- .len = 1,
- .buf = &reg,
- },
- {
- .addr = addr,
- .flags = I2C_M_RD,
- .len = 2,
- .buf = data,
- },
- };
- int err;
- u8 len;
-
- /* xiic-i2c for some stupid reason only does 2 byte reads. */
- while (sz) {
- len = min_t(u8, sz, 2);
- msgs[1].len = len;
- err = i2c_transfer(adap, msgs, 2);
- if (err != msgs[1].len)
- return err;
- msgs[1].buf += len;
- reg += len;
- sz -= len;
+ struct ptp_ocp_nvmem_match_info info = { .bp = bp, .tag = tag };
+
+ return nvmem_device_find(&info, ptp_ocp_nvmem_match);
+}
+
+static inline void
+ptp_ocp_nvmem_device_put(struct nvmem_device **nvmemp)
+{
+ if (*nvmemp != NULL) {
+ nvmem_device_put(*nvmemp);
+ *nvmemp = NULL;
}
- return 0;
}
static void
-ptp_ocp_get_serial_number(struct ptp_ocp *bp)
+ptp_ocp_read_eeprom(struct ptp_ocp *bp)
{
- struct i2c_adapter *adap;
- struct device *dev;
- int err;
+ const struct ptp_ocp_eeprom_map *map;
+ struct nvmem_device *nvmem;
+ const void *tag;
+ int ret;
if (!bp->i2c_ctrl)
return;
- dev = device_find_child(&bp->i2c_ctrl->dev, NULL, ptp_ocp_firstchild);
- if (!dev) {
- dev_err(&bp->pdev->dev, "Can't find I2C adapter\n");
- return;
- }
-
- adap = i2c_verify_adapter(dev);
- if (!adap) {
- dev_err(&bp->pdev->dev, "device '%s' isn't an I2C adapter\n",
- dev_name(dev));
- goto out;
- }
+ tag = NULL;
+ nvmem = NULL;
- err = ptp_ocp_read_i2c(adap, 0x58, 0x9A, 6, bp->serial);
- if (err) {
- dev_err(&bp->pdev->dev, "could not read eeprom: %d\n", err);
- goto out;
+ for (map = bp->eeprom_map; map->len; map++) {
+ if (map->tag != tag) {
+ tag = map->tag;
+ ptp_ocp_nvmem_device_put(&nvmem);
+ }
+ if (!nvmem) {
+ nvmem = ptp_ocp_nvmem_device_get(bp, tag);
+ if (!nvmem)
+ goto out;
+ }
+ ret = nvmem_device_read(nvmem, map->off, map->len,
+ BP_MAP_ENTRY_ADDR(bp, map));
+ if (ret != map->len)
+ goto read_fail;
}
- bp->has_serial = true;
+ bp->has_eeprom_data = true;
out:
- put_device(dev);
+ ptp_ocp_nvmem_device_put(&nvmem);
+ return;
+
+read_fail:
+ dev_err(&bp->pdev->dev, "could not read eeprom: %d\n", ret);
+ goto out;
+}
+
+static int
+ptp_ocp_firstchild(struct device *dev, void *data)
+{
+ return 1;
}
static struct device *
@@ -1109,16 +1157,23 @@ ptp_ocp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
return err;
}
- if (!bp->has_serial)
- ptp_ocp_get_serial_number(bp);
-
- if (bp->has_serial) {
- sprintf(buf, "%pM", bp->serial);
- err = devlink_info_serial_number_put(req, buf);
- if (err)
- return err;
+ if (!bp->has_eeprom_data) {
+ ptp_ocp_read_eeprom(bp);
+ if (!bp->has_eeprom_data)
+ return 0;
}
+ sprintf(buf, "%pM", bp->serial);
+ err = devlink_info_serial_number_put(req, buf);
+ if (err)
+ return err;
+
+ err = devlink_info_version_fixed_put(req,
+ DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,
+ bp->board_id);
+ if (err)
+ return err;
+
return 0;
}
@@ -1412,6 +1467,7 @@ static int
ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r)
{
bp->flash_start = 1024 * 4096;
+ bp->eeprom_map = fb_eeprom_map;
ptp_ocp_tod_init(bp);
ptp_ocp_nmea_out_init(bp);
@@ -1810,8 +1866,8 @@ serialnum_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ptp_ocp *bp = dev_get_drvdata(dev);
- if (!bp->has_serial)
- ptp_ocp_get_serial_number(bp);
+ if (!bp->has_eeprom_data)
+ ptp_ocp_read_eeprom(bp);
return sysfs_emit(buf, "%pM\n", bp->serial);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 04:53:43 +0100