diff options
author | Raju Lakkaraju <Raju.Lakkaraju@microchip.com> | 2022-03-17 13:43:08 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-03-18 15:53:23 +0300 |
commit | d808f7ca8d23e3a69bed00317def7b85fbb74584 (patch) | |
tree | d042cb7ae3f5b57cef6f10091bb1e6cadfa08a35 | |
parent | cdea83cc103a737a235d77d0cd21ab8a1108a1d9 (diff) | |
download | linux-d808f7ca8d23e3a69bed00317def7b85fbb74584.tar.xz |
net: lan743x: Add support for OTP
Add new the OTP read and write access functions for PCI11010/PCI11414 chips
PCI11010/PCI11414 OTP module register offsets are different from
LAN743x OTP module
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/ethernet/microchip/lan743x_ethtool.c | 169 | ||||
-rw-r--r-- | drivers/net/ethernet/microchip/lan743x_main.h | 14 |
2 files changed, 180 insertions, 3 deletions
diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c index af64ec8c344d..c8fe8b31f07b 100644 --- a/drivers/net/ethernet/microchip/lan743x_ethtool.c +++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c @@ -212,6 +212,160 @@ static void lan743x_hs_syslock_release(struct lan743x_adapter *adapter) spin_unlock(&adapter->eth_syslock_spinlock); } +static void lan743x_hs_otp_power_up(struct lan743x_adapter *adapter) +{ + u32 reg_value; + + reg_value = lan743x_csr_read(adapter, HS_OTP_PWR_DN); + if (reg_value & OTP_PWR_DN_PWRDN_N_) { + reg_value &= ~OTP_PWR_DN_PWRDN_N_; + lan743x_csr_write(adapter, HS_OTP_PWR_DN, reg_value); + /* To flush the posted write so the subsequent delay is + * guaranteed to happen after the write at the hardware + */ + lan743x_csr_read(adapter, HS_OTP_PWR_DN); + udelay(1); + } +} + +static void lan743x_hs_otp_power_down(struct lan743x_adapter *adapter) +{ + u32 reg_value; + + reg_value = lan743x_csr_read(adapter, HS_OTP_PWR_DN); + if (!(reg_value & OTP_PWR_DN_PWRDN_N_)) { + reg_value |= OTP_PWR_DN_PWRDN_N_; + lan743x_csr_write(adapter, HS_OTP_PWR_DN, reg_value); + /* To flush the posted write so the subsequent delay is + * guaranteed to happen after the write at the hardware + */ + lan743x_csr_read(adapter, HS_OTP_PWR_DN); + udelay(1); + } +} + +static void lan743x_hs_otp_set_address(struct lan743x_adapter *adapter, + u32 address) +{ + lan743x_csr_write(adapter, HS_OTP_ADDR_HIGH, (address >> 8) & 0x03); + lan743x_csr_write(adapter, HS_OTP_ADDR_LOW, address & 0xFF); +} + +static void lan743x_hs_otp_read_go(struct lan743x_adapter *adapter) +{ + lan743x_csr_write(adapter, HS_OTP_FUNC_CMD, OTP_FUNC_CMD_READ_); + lan743x_csr_write(adapter, HS_OTP_CMD_GO, OTP_CMD_GO_GO_); +} + +static int lan743x_hs_otp_cmd_cmplt_chk(struct lan743x_adapter *adapter) +{ + u32 val; + + return readx_poll_timeout(LAN743X_CSR_READ_OP, HS_OTP_STATUS, val, + !(val & OTP_STATUS_BUSY_), + 80, 10000); +} + +static int lan743x_hs_otp_read(struct lan743x_adapter *adapter, u32 offset, + u32 length, u8 *data) +{ + int ret; + int i; + + ret = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + + lan743x_hs_otp_power_up(adapter); + + ret = lan743x_hs_otp_cmd_cmplt_chk(adapter); + if (ret < 0) + goto power_down; + + lan743x_hs_syslock_release(adapter); + + for (i = 0; i < length; i++) { + ret = lan743x_hs_syslock_acquire(adapter, + LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + + lan743x_hs_otp_set_address(adapter, offset + i); + + lan743x_hs_otp_read_go(adapter); + ret = lan743x_hs_otp_cmd_cmplt_chk(adapter); + if (ret < 0) + goto power_down; + + data[i] = lan743x_csr_read(adapter, HS_OTP_READ_DATA); + + lan743x_hs_syslock_release(adapter); + } + + ret = lan743x_hs_syslock_acquire(adapter, + LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + +power_down: + lan743x_hs_otp_power_down(adapter); + lan743x_hs_syslock_release(adapter); + + return ret; +} + +static int lan743x_hs_otp_write(struct lan743x_adapter *adapter, u32 offset, + u32 length, u8 *data) +{ + int ret; + int i; + + ret = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + + lan743x_hs_otp_power_up(adapter); + + ret = lan743x_hs_otp_cmd_cmplt_chk(adapter); + if (ret < 0) + goto power_down; + + /* set to BYTE program mode */ + lan743x_csr_write(adapter, HS_OTP_PRGM_MODE, OTP_PRGM_MODE_BYTE_); + + lan743x_hs_syslock_release(adapter); + + for (i = 0; i < length; i++) { + ret = lan743x_hs_syslock_acquire(adapter, + LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + + lan743x_hs_otp_set_address(adapter, offset + i); + + lan743x_csr_write(adapter, HS_OTP_PRGM_DATA, data[i]); + lan743x_csr_write(adapter, HS_OTP_TST_CMD, + OTP_TST_CMD_PRGVRFY_); + lan743x_csr_write(adapter, HS_OTP_CMD_GO, OTP_CMD_GO_GO_); + + ret = lan743x_hs_otp_cmd_cmplt_chk(adapter); + if (ret < 0) + goto power_down; + + lan743x_hs_syslock_release(adapter); + } + + ret = lan743x_hs_syslock_acquire(adapter, LOCK_TIMEOUT_MAX_CNT); + if (ret < 0) + return ret; + +power_down: + lan743x_hs_otp_power_down(adapter); + lan743x_hs_syslock_release(adapter); + + return ret; +} + static int lan743x_eeprom_wait(struct lan743x_adapter *adapter) { unsigned long start_time = jiffies; @@ -462,7 +616,12 @@ static int lan743x_ethtool_get_eeprom(struct net_device *netdev, int ret = 0; if (adapter->flags & LAN743X_ADAPTER_FLAG_OTP) { - ret = lan743x_otp_read(adapter, ee->offset, ee->len, data); + if (adapter->is_pci11x1x) + ret = lan743x_hs_otp_read(adapter, ee->offset, + ee->len, data); + else + ret = lan743x_otp_read(adapter, ee->offset, + ee->len, data); } else { if (adapter->is_pci11x1x) ret = lan743x_hs_eeprom_read(adapter, ee->offset, @@ -484,8 +643,12 @@ static int lan743x_ethtool_set_eeprom(struct net_device *netdev, if (adapter->flags & LAN743X_ADAPTER_FLAG_OTP) { /* Beware! OTP is One Time Programming ONLY! */ if (ee->magic == LAN743X_OTP_MAGIC) { - ret = lan743x_otp_write(adapter, ee->offset, - ee->len, data); + if (adapter->is_pci11x1x) + ret = lan743x_hs_otp_write(adapter, ee->offset, + ee->len, data); + else + ret = lan743x_otp_write(adapter, ee->offset, + ee->len, data); } } else { if (ee->magic == LAN743X_EEPROM_MAGIC) { diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h index 5ae3420340f3..d1036a323c52 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -556,6 +556,20 @@ #define OTP_STATUS (0x1030) #define OTP_STATUS_BUSY_ BIT(0) +/* Hearthstone OTP block registers */ +#define HS_OTP_BLOCK_BASE (ETH_SYS_REG_ADDR_BASE + \ + ETH_OTP_REG_ADDR_BASE) +#define HS_OTP_PWR_DN (HS_OTP_BLOCK_BASE + 0x0) +#define HS_OTP_ADDR_HIGH (HS_OTP_BLOCK_BASE + 0x4) +#define HS_OTP_ADDR_LOW (HS_OTP_BLOCK_BASE + 0x8) +#define HS_OTP_PRGM_DATA (HS_OTP_BLOCK_BASE + 0x10) +#define HS_OTP_PRGM_MODE (HS_OTP_BLOCK_BASE + 0x14) +#define HS_OTP_READ_DATA (HS_OTP_BLOCK_BASE + 0x18) +#define HS_OTP_FUNC_CMD (HS_OTP_BLOCK_BASE + 0x20) +#define HS_OTP_TST_CMD (HS_OTP_BLOCK_BASE + 0x24) +#define HS_OTP_CMD_GO (HS_OTP_BLOCK_BASE + 0x28) +#define HS_OTP_STATUS (HS_OTP_BLOCK_BASE + 0x30) + /* MAC statistics registers */ #define STAT_RX_FCS_ERRORS (0x1200) #define STAT_RX_ALIGNMENT_ERRORS (0x1204) |