The QCA9887 stores its calibration data (board.bin) inside the EEPROM of
the target. This has to be downloaded manually to allow the device to
initialize correctly.
Signed-off-by: Sven Eckelmann <sven.eckelm...@open-mesh.com>
---
drivers/net/wireless/ath/ath10k/core.c | 41 +++++++++-
drivers/net/wireless/ath/ath10k/core.h | 3 +
drivers/net/wireless/ath/ath10k/hif.h | 14 ++++
drivers/net/wireless/ath/ath10k/hw.h | 22 ++++++
drivers/net/wireless/ath/ath10k/pci.c | 139 +++++++++++++++++++++++++++++++++
5 files changed, 218 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c
b/drivers/net/wireless/ath/ath10k/core.c
index 0f4a4f6..a70759a 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/of.h>
+#include <asm/byteorder.h>
#include "core.h"
#include "mac.h"
@@ -550,6 +551,34 @@ out:
return ret;
}
+static int ath10k_download_cal_eeprom(struct ath10k *ar)
+{
+ size_t data_len;
+ void *data = NULL;
+ int ret;
+
+ ret = ath10k_hif_fetch_target_board_data(ar, &data, &data_len);
+ if (ret) {
+ ath10k_warn(ar, "failed to read calibration data from EEPROM:
%d\n",
+ ret);
+ goto out_free;
+ }
+
+ ret = ath10k_download_board_data(ar, data, data_len);
+ if (ret) {
+ ath10k_warn(ar, "failed to download calibration data from
EEPROM: %d\n",
+ ret);
+ goto out_free;
+ }
+
+ ret = 0;
+
+out_free:
+ kfree(data);
+
+ return ret;
+}
+
static int ath10k_core_get_board_id_from_otp(struct ath10k *ar)
{
u32 result, address;
@@ -1312,7 +1341,17 @@ static int ath10k_download_cal_data(struct ath10k *ar)
}
ath10k_dbg(ar, ATH10K_DBG_BOOT,
- "boot did not find DT entry, try OTP next: %d\n",
+ "boot did not find DT entry, try target EEPROM next: %d\n",
+ ret);
+
+ ret = ath10k_download_cal_eeprom(ar);
+ if (ret == 0) {
+ ar->cal_mode = ATH10K_CAL_MODE_EEPROM;
+ goto done;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "boot did not find target EEPROM entry, try OTP next: %d\n",
ret);
ret = ath10k_download_and_run_otp(ar);
diff --git a/drivers/net/wireless/ath/ath10k/core.h
b/drivers/net/wireless/ath/ath10k/core.h
index 1852e0e..86d7642 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -571,6 +571,7 @@ enum ath10k_cal_mode {
ATH10K_CAL_MODE_DT,
ATH10K_PRE_CAL_MODE_FILE,
ATH10K_PRE_CAL_MODE_DT,
+ ATH10K_CAL_MODE_EEPROM,
};
enum ath10k_crypt_mode {
@@ -593,6 +594,8 @@ static inline const char *ath10k_cal_mode_str(enum
ath10k_cal_mode mode)
return "pre-cal-file";
case ATH10K_PRE_CAL_MODE_DT:
return "pre-cal-dt";
+ case ATH10K_CAL_MODE_EEPROM:
+ return "eeprom";
}
return "unknown";
diff --git a/drivers/net/wireless/ath/ath10k/hif.h
b/drivers/net/wireless/ath/ath10k/hif.h
index 89e7076..c18b8c8 100644
--- a/drivers/net/wireless/ath/ath10k/hif.h
+++ b/drivers/net/wireless/ath/ath10k/hif.h
@@ -87,6 +87,10 @@ struct ath10k_hif_ops {
int (*suspend)(struct ath10k *ar);
int (*resume)(struct ath10k *ar);
+
+ /* fetch board data from target eeprom */
+ int (*fetch_target_board_data)(struct ath10k *ar, void **data,
+ size_t *data_len);
};
static inline int ath10k_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
@@ -202,4 +206,14 @@ static inline void ath10k_hif_write32(struct ath10k *ar,
ar->hif.ops->write32(ar, address, data);
}
+static inline int ath10k_hif_fetch_target_board_data(struct ath10k *ar,
+ void **data,
+ size_t *data_len)
+{
+ if (!ar->hif.ops->fetch_target_board_data)
+ return -EOPNOTSUPP;
+
+ return ar->hif.ops->fetch_target_board_data(ar, data, data_len);
+}
+
#endif /* _HIF_H_ */
diff --git a/drivers/net/wireless/ath/ath10k/hw.h
b/drivers/net/wireless/ath/ath10k/hw.h
index 9108831..53ca40e 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -557,7 +557,10 @@ enum ath10k_hw_4addr_pad {
#define WLAN_SYSTEM_SLEEP_DISABLE_MASK 0x00000001
#define WLAN_GPIO_PIN0_ADDRESS 0x00000028
+#define WLAN_GPIO_PIN0_CONFIG_LSB 11
#define WLAN_GPIO_PIN0_CONFIG_MASK 0x00007800
+#define WLAN_GPIO_PIN0_PAD_PULL_LSB 5
+#define WLAN_GPIO_PIN0_PAD_PULL_MASK 0x00000060
#define WLAN_GPIO_PIN1_ADDRESS 0x0000002c
#define WLAN_GPIO_PIN1_CONFIG_MASK 0x00007800
#define WLAN_GPIO_PIN10_ADDRESS 0x00000050
@@ -570,6 +573,8 @@ enum ath10k_hw_4addr_pad {
#define CLOCK_GPIO_BT_CLK_OUT_EN_MASK 0
#define SI_CONFIG_OFFSET 0x00000000
+#define SI_CONFIG_ERR_INT_LSB 19
+#define SI_CONFIG_ERR_INT_MASK 0x00080000
#define SI_CONFIG_BIDIR_OD_DATA_LSB 18
#define SI_CONFIG_BIDIR_OD_DATA_MASK 0x00040000
#define SI_CONFIG_I2C_LSB 16
@@ -583,7 +588,9 @@ enum ath10k_hw_4addr_pad {
#define SI_CONFIG_DIVIDER_LSB 0
#define SI_CONFIG_DIVIDER_MASK 0x0000000f
#define SI_CS_OFFSET 0x00000004
+#define SI_CS_DONE_ERR_LSB 10
#define SI_CS_DONE_ERR_MASK 0x00000400
+#define SI_CS_DONE_INT_LSB 9
#define SI_CS_DONE_INT_MASK 0x00000200
#define SI_CS_START_LSB 8
#define SI_CS_START_MASK 0x00000100
@@ -634,7 +641,10 @@ enum ath10k_hw_4addr_pad {
#define GPIO_BASE_ADDRESS WLAN_GPIO_BASE_ADDRESS
#define GPIO_PIN0_OFFSET WLAN_GPIO_PIN0_ADDRESS
#define GPIO_PIN1_OFFSET WLAN_GPIO_PIN1_ADDRESS
+#define GPIO_PIN0_CONFIG_LSB WLAN_GPIO_PIN0_CONFIG_LSB
#define GPIO_PIN0_CONFIG_MASK WLAN_GPIO_PIN0_CONFIG_MASK
+#define GPIO_PIN0_PAD_PULL_LSB WLAN_GPIO_PIN0_PAD_PULL_LSB
+#define GPIO_PIN0_PAD_PULL_MASK
WLAN_GPIO_PIN0_PAD_PULL_MASK
#define GPIO_PIN1_CONFIG_MASK WLAN_GPIO_PIN1_CONFIG_MASK
#define SI_BASE_ADDRESS WLAN_SI_BASE_ADDRESS
#define SCRATCH_BASE_ADDRESS SOC_CORE_BASE_ADDRESS
@@ -689,6 +699,18 @@ enum ath10k_hw_4addr_pad {
#define WINDOW_READ_ADDR_ADDRESS MISSING
#define WINDOW_WRITE_ADDR_ADDRESS MISSING
+#define QCA9887_1_0_I2C_SDA_GPIO_PIN 5
+#define QCA9887_1_0_I2C_SDA_PIN_CONFIG 3
+#define QCA9887_1_0_SI_CLK_GPIO_PIN 17
+#define QCA9887_1_0_SI_CLK_PIN_CONFIG 3
+#define QCA9887_1_0_GPIO_ENABLE_W1TS_LOW_ADDRESS 0x00000010
+
+#define QCA9887_EEPROM_SELECT_READ 0xa10000a0
+#define QCA9887_EEPROM_ADDR_HI_MASK 0x0000ff00
+#define QCA9887_EEPROM_ADDR_HI_LSB 8
+#define QCA9887_EEPROM_ADDR_LO_MASK 0x00ff0000
+#define QCA9887_EEPROM_ADDR_LO_LSB 16
+
#define RTC_STATE_V_GET(x) (((x) & RTC_STATE_V_MASK) >> RTC_STATE_V_LSB)
#endif /* _HW_H_ */
diff --git a/drivers/net/wireless/ath/ath10k/pci.c
b/drivers/net/wireless/ath/ath10k/pci.c
index b799f46..c156705 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -2566,6 +2566,144 @@ static int ath10k_pci_hif_resume(struct ath10k *ar)
}
#endif
+static bool ath10k_pci_validate_cal(void *data, size_t size)
+{
+ __le16 *cal_words = data;
+ u16 checksum = 0;
+ size_t i;
+
+ if (size % 2 != 0)
+ return false;
+
+ for (i = 0; i < size / 2; i++)
+ checksum ^= le16_to_cpu(cal_words[i]);
+
+ return checksum == 0xffff;
+}
+
+static void ath10k_pci_enable_eeprom(struct ath10k *ar)
+{
+ /* Enable SI clock */
+ ath10k_pci_soc_write32(ar, CLOCK_CONTROL_OFFSET, 0x0);
+
+ /* Configure GPIOs for I2C operation */
+ ath10k_pci_write32(ar,
+ GPIO_BASE_ADDRESS + GPIO_PIN0_OFFSET +
+ 4 * QCA9887_1_0_I2C_SDA_GPIO_PIN,
+ SM(QCA9887_1_0_I2C_SDA_PIN_CONFIG,
+ GPIO_PIN0_CONFIG) |
+ SM(1, GPIO_PIN0_PAD_PULL));
+
+ ath10k_pci_write32(ar,
+ GPIO_BASE_ADDRESS + GPIO_PIN0_OFFSET +
+ 4 * QCA9887_1_0_SI_CLK_GPIO_PIN,
+ SM(QCA9887_1_0_SI_CLK_PIN_CONFIG, GPIO_PIN0_CONFIG) |
+ SM(1, GPIO_PIN0_PAD_PULL));
+
+ ath10k_pci_write32(ar,
+ GPIO_BASE_ADDRESS +
+ QCA9887_1_0_GPIO_ENABLE_W1TS_LOW_ADDRESS,
+ 1u << QCA9887_1_0_SI_CLK_GPIO_PIN);
+
+ /* In Swift ASIC - EEPROM clock will be (110MHz/512) = 214KHz */
+ ath10k_pci_write32(ar,
+ SI_BASE_ADDRESS + SI_CONFIG_OFFSET,
+ SM(1, SI_CONFIG_ERR_INT) |
+ SM(1, SI_CONFIG_BIDIR_OD_DATA) |
+ SM(1, SI_CONFIG_I2C) |
+ SM(1, SI_CONFIG_POS_SAMPLE) |
+ SM(1, SI_CONFIG_INACTIVE_DATA) |
+ SM(1, SI_CONFIG_INACTIVE_CLK) |
+ SM(8, SI_CONFIG_DIVIDER));
+}
+
+static int ath10k_pci_read_eeprom(struct ath10k *ar, u16 addr, u8 *out)
+{
+ u32 reg;
+ int wait_limit;
+
+ /* set device select byte and for the read operation */
+ reg = QCA9887_EEPROM_SELECT_READ |
+ SM(addr, QCA9887_EEPROM_ADDR_LO) |
+ SM(addr >> 8, QCA9887_EEPROM_ADDR_HI);
+ ath10k_pci_write32(ar, SI_BASE_ADDRESS + SI_TX_DATA0_OFFSET, reg);
+
+ /* write transmit data, transfer length, and START bit */
+ ath10k_pci_write32(ar, SI_BASE_ADDRESS + SI_CS_OFFSET,
+ SM(1, SI_CS_START) | SM(1, SI_CS_RX_CNT) |
+ SM(4, SI_CS_TX_CNT));
+
+ /* wait max 1 sec */
+ wait_limit = 100000;
+
+ /* wait for SI_CS_DONE_INT */
+ do {
+ reg = ath10k_pci_read32(ar, SI_BASE_ADDRESS + SI_CS_OFFSET);
+ if (MS(reg, SI_CS_DONE_INT))
+ break;
+
+ wait_limit--;
+ udelay(10);
+ } while (wait_limit > 0);
+
+ if (!MS(reg, SI_CS_DONE_INT)) {
+ ath10k_err(ar, "timeout while reading device EEPROM at %04x\n",
+ addr);
+ return -ETIMEDOUT;
+ }
+
+ /* clear SI_CS_DONE_INT */
+ ath10k_pci_write32(ar, SI_BASE_ADDRESS + SI_CS_OFFSET, reg);
+
+ if (MS(reg, SI_CS_DONE_ERR)) {
+ ath10k_err(ar, "failed to read device EEPROM at %04x\n", addr);
+ return -EIO;
+ }
+
+ /* extract receive data */
+ reg = ath10k_pci_read32(ar, SI_BASE_ADDRESS + SI_RX_DATA0_OFFSET);
+ *out = reg;
+
+ return 0;
+}
+
+static int ath10k_pci_fetch_target_board_data(struct ath10k *ar, void **data,
+ size_t *data_len)
+{
+ u8 *caldata = NULL;
+ size_t calsize, i;
+ int ret;
+
+ if (!QCA_REV_9887(ar))
+ return -EOPNOTSUPP;
+
+ calsize = ar->hw_params.cal_data_len;
+ caldata = kmalloc(calsize, GFP_KERNEL);
+ if (!caldata)
+ return -ENOMEM;
+
+ ath10k_pci_enable_eeprom(ar);
+
+ for (i = 0; i < calsize; i++) {
+ ret = ath10k_pci_read_eeprom(ar, i, &caldata[i]);
+ if (ret)
+ goto err_free;
+ }
+
+ if (!ath10k_pci_validate_cal(caldata, calsize))
+ goto err_free;
+
+ *data = caldata;
+ *data_len = calsize;
+
+ return 0;
+
+err_free:
+ kfree(data);
+
+ return -EINVAL;
+}
+
static const struct ath10k_hif_ops ath10k_pci_hif_ops = {
.tx_sg = ath10k_pci_hif_tx_sg,
.diag_read = ath10k_pci_hif_diag_read,
@@ -2585,6 +2723,7 @@ static const struct ath10k_hif_ops ath10k_pci_hif_ops = {
.suspend = ath10k_pci_hif_suspend,
.resume = ath10k_pci_hif_resume,
#endif
+ .fetch_target_board_data = ath10k_pci_fetch_target_board_data,
};
/*
--
2.8.1
--
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