The patch add tb_nvm_quirks() contain an array that has functions pointers to tb_nvm_vendor_apply().
And tb_nvm_vendor_apply() that recognize supported vendor works in one of the following cases:
Case 0:enable nvm's attribute by setting no_nvm_upgrade flag to create nvm_authenticate file node.
Case 1:add active/non-active NVM devices.
Case 2:update firmware to non-ative NVM device.
Signed-off-by: Szuying Chen <Chloe_Chen@xxxxxxxxxxxxxx>
---
drivers/thunderbolt/nvm.c | 163 +++++++++++++++++++++++++++++++++++
drivers/thunderbolt/switch.c | 12 +++
drivers/thunderbolt/tb.h | 12 +++
3 files changed, 187 insertions(+)
diff --git a/drivers/thunderbolt/nvm.c b/drivers/thunderbolt/nvm.c
index b3f310389378..d5f283889da8 100644
--- a/drivers/thunderbolt/nvm.c
+++ b/drivers/thunderbolt/nvm.c
@@ -9,10 +9,173 @@
#include <linux/idr.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <linux/pm_runtime.h>
#include "tb.h"
static DEFINE_IDA(nvm_ida);
+static int tb_switch_nvm_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct tb_nvm *nvm = priv;
+ struct tb_switch *sw = tb_to_switch(nvm->dev);
+ int ret;
+
+ pm_runtime_get_sync(&sw->dev);
+
+ if (!mutex_trylock(&sw->tb->lock)) {
+ ret = restart_syscall();
+ goto out;
+ }
+
+ ret = usb4_switch_nvm_read(sw, offset, val, bytes);
+ mutex_unlock(&sw->tb->lock);
+
+out:
+ pm_runtime_mark_last_busy(&sw->dev);
+ pm_runtime_put_autosuspend(&sw->dev);
+
+ return ret;
+}
+
+static int tb_switch_nvm_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct tb_nvm *nvm = priv;
+ struct tb_switch *sw = tb_to_switch(nvm->dev);
+ int ret;
+
+ if (!mutex_trylock(&sw->tb->lock))
+ return restart_syscall();
+
+ /*
+ * Since writing the NVM image might require some special steps,
+ * for example when CSS headers are written, we cache the image
+ * locally here and handle the special cases when the user asks
+ * us to authenticate the image.
+ */
+ ret = tb_nvm_write_buf(nvm, offset, val, bytes);
+ mutex_unlock(&sw->tb->lock);
+
+ return ret;
+}
+
+static int tb_nvm_vendor_apply(struct tb_switch *sw, unsigned int handle)
+{
+ int ret = 0;
+
+ switch (handle) {
+ case 0:
+ if (sw->no_nvm_upgrade)
+ sw->no_nvm_upgrade = false;
+
+ break;
+
+ case 1:
+ struct tb_nvm *nvm;
+ u32 val;
+ u32 nvm_size;
+
+ nvm = tb_nvm_alloc(&sw->dev);
+ if (IS_ERR(nvm)) {
+ ret = PTR_ERR(nvm);
+ break;
+ }
+
+ ret = usb4_switch_nvm_read(sw, NVM_Date, &val, sizeof(val));
+ if (ret)
+ break;
+
+ nvm->vendor.date = (((u8)val) << 0x10 | ((u8)(val >> 0x8)) << 0x8 | (u8)(val >> 0x10));
+ ret = usb4_switch_nvm_read(sw, NVM_CUSTOMER_ID, &val, sizeof(val));
+ if (ret)
+ break;
+
+ nvm->vendor.customerID = (((u8)val) << 0x8 | ((u8)(val >> 0x8)));
+ nvm->vendor.version = (u8)(val >> 0x10);
+ nvm_size = SZ_512K;
+ ret = tb_nvm_add_active(nvm, nvm_size, tb_switch_nvm_read);
+ if (ret)
+ break;
+
+ ret = tb_nvm_add_non_active(nvm, NVM_MAX_SIZE, tb_switch_nvm_write);
+ if (ret)
+ break;
+
+ sw->nvm = nvm;
+ break;
+
+ case 2:
+ unsigned int image_size;
+ const u8 *buf = sw->nvm->buf;
+
+ if (!buf) {
+ ret = -EINVAL;
+ break;
+ }
+ image_size = sw->nvm->buf_data_size;
+ if (image_size < NVM_MIN_SIZE || image_size > NVM_MAX_SIZE) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = usb4_switch_nvm_write(sw, 0, buf, image_size);
+ if (!ret)
+ sw->nvm->flushed = true;
+
+ break;
+
+ default:
+ break;
+ }
+
+ if ((handle == 1) && (ret != 0))
+ tb_nvm_free(sw->nvm);
+
+ return ret;
+}
+
+struct tb_nvm_id {
+ u16 hw_vendor_id;
+ u16 hw_device_id;
+ u16 vendor;
+ u16 device;
+ int (*hook)(struct tb_switch *sw, unsigned int handle);
+};
+
+static const struct tb_nvm_id tb_nvm_vendors[] = {
+ /* ASMedia software CM firmware upgrade */
+ { 0x174c, 0x2428, 0x174c, 0x0009, tb_nvm_vendor_apply },
+};
+
+/**
+ * tb_nvm_quirks() - support vendor's NVM format
+ * @sw: Thunderbolt switch
+ */
+int tb_nvm_quirks(struct tb_switch *sw, unsigned int handle)
+{
+ int res, i;
+ bool NoVendor = true;
+
+ for (i = 0; i < ARRAY_SIZE(tb_nvm_vendors); i++) {
+ const struct tb_nvm_id *q = &tb_nvm_vendors[i];
+
+ if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
+ continue;
+ if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
+ continue;
+ if (q->vendor && q->vendor != sw->vendor)
+ continue;
+ if (q->device && q->device != sw->device)
+ continue;
+
+ res = q->hook(sw, handle);
+ NoVendor = false;
+ }
+ if (NoVendor)
+ return -ENODEV;
+ else
+ return res;
+}
/**
* tb_nvm_alloc() - Allocate new NVM structure
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 561e1d77240e..a654b6951bef 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -114,6 +114,10 @@ static int nvm_validate_and_write(struct tb_switch *sw)
if (image_size < NVM_MIN_SIZE || image_size > NVM_MAX_SIZE)
return -EINVAL;
+ ret = tb_nvm_quirks(sw, 2);
+ if (ret != -ENODEV)
+ return ret;
+
/*
* FARB pointer must point inside the image and must at least
* contain parts of the digital section we will be reading here.
@@ -390,6 +394,11 @@ static int tb_switch_nvm_add(struct tb_switch *sw)
if (!nvm_readable(sw))
return 0;
+ /* Vendor's NVM formats definition */
+ ret = tb_nvm_quirks(sw, 1);
+ if (ret != -ENODEV)
+ return ret;
+
/*
* The NVM format of non-Intel hardware is not known so
* currently restrict NVM upgrade for Intel hardware. We may
@@ -1953,6 +1962,8 @@ static ssize_t nvm_version_show(struct device *dev,
ret = -ENODATA;
else if (!sw->nvm)
ret = -EAGAIN;
+ else if (sw->config.vendor_id == 0x174C)
+ ret = sprintf(buf, "%06x_%04x_%02x\n", sw->nvm->vendor.date, sw->nvm->vendor.customerID, sw->nvm->vendor.version);
else
ret = sprintf(buf, "%x.%x\n", sw->nvm->major, sw->nvm->minor);
@@ -2860,6 +2871,7 @@ int tb_switch_add(struct tb_switch *sw)
tb_sw_dbg(sw, "uid: %#llx\n", sw->uid);
tb_check_quirks(sw);
+ tb_nvm_quirks(sw, 0);
ret = tb_switch_set_uuid(sw);
if (ret) {
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index a831faa50f65..9dd1ba7b07b6 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -27,6 +27,16 @@
#define NVM_VERSION 0x08
#define NVM_FLASH_SIZE 0x45
+/* ASMedia specific NVM offsets */
+#define NVM_Date 0x1C
+#define NVM_CUSTOMER_ID 0x28
+
+struct tb_nvm_vendor {
+ int date;
+ u16 customerID;
+ u8 version;
+};
+
/**
* struct tb_nvm - Structure holding NVM information
* @dev: Owner of the NVM
@@ -56,6 +66,7 @@ struct tb_nvm {
size_t buf_data_size;
bool authenticating;
bool flushed;
+ struct tb_nvm_vendor vendor;
};
enum tb_nvm_write_ops {
@@ -735,6 +746,7 @@ static inline void tb_domain_put(struct tb *tb)
put_device(&tb->dev);
}
+int tb_nvm_quirks(struct tb_switch *sw, unsigned int handle);
struct tb_nvm *tb_nvm_alloc(struct device *dev);
int tb_nvm_add_active(struct tb_nvm *nvm, size_t size, nvmem_reg_read_t reg_read);
int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val,
--
2.34.1
