[PATCH 3/5] qla3xxx: Add delay to NVRAM register access.
From: Ron Mercer <hidden>
Date: 2006-12-19 18:33:05
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Some platforms showed issues when no delay was used. This code only runs during the probe. Signed-off-by: Ron Mercer <redacted> --- drivers/net/qla3xxx.c | 37 +++++++++++++++++++++++-------------- 1 files changed, 23 insertions(+), 14 deletions(-)
diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index ae65602..5aef8aa 100644
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c@@ -210,6 +210,15 @@ static void ql_write_common_reg(struct q return; } +static void ql_write_nvram_reg(struct ql3_adapter *qdev, + u32 __iomem *reg, u32 value) +{ + writel(value, reg); + readl(reg); + udelay(1); + return; +} + static void ql_write_page0_reg(struct ql3_adapter *qdev, u32 __iomem *reg, u32 value) {
@@ -338,9 +347,9 @@ static void fm93c56a_select(struct ql3_a qdev->mem_map_registers; qdev->eeprom_cmd_data = AUBURN_EEPROM_CS_1; - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->eeprom_cmd_data); - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ((ISP_NVRAM_MASK << 16) | qdev->eeprom_cmd_data)); }
@@ -357,14 +366,14 @@ static void fm93c56a_cmd(struct ql3_adap qdev->mem_map_registers; /* Clock in a zero, then do the start bit */ - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->eeprom_cmd_data | AUBURN_EEPROM_DO_1); - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | AUBURN_EEPROM_DO_1 | AUBURN_EEPROM_CLK_RISE); - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | AUBURN_EEPROM_DO_1 | AUBURN_EEPROM_CLK_FALL);
@@ -380,20 +389,20 @@ static void fm93c56a_cmd(struct ql3_adap * If the bit changed, then change the DO state to * match */ - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | dataBit); previousBit = dataBit; } - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | dataBit | AUBURN_EEPROM_CLK_RISE); - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->
@@ -414,20 +423,20 @@ static void fm93c56a_cmd(struct ql3_adap * If the bit changed, then change the DO state to * match */ - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | dataBit); previousBit = dataBit; } - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev-> eeprom_cmd_data | dataBit | AUBURN_EEPROM_CLK_RISE); - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->
@@ -445,7 +454,7 @@ static void fm93c56a_deselect(struct ql3 struct ql3xxx_port_registers __iomem *port_regs = qdev->mem_map_registers; qdev->eeprom_cmd_data = AUBURN_EEPROM_CS_0; - ql_write_common_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs.serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->eeprom_cmd_data); }
@@ -463,12 +472,12 @@ static void fm93c56a_datain(struct ql3_a /* Read the data bits */ /* The first bit is a dummy. Clock right over it. */ for (i = 0; i < dataBits; i++) { - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->eeprom_cmd_data | AUBURN_EEPROM_CLK_RISE); - ql_write_common_reg(qdev, + ql_write_nvram_reg(qdev, &port_regs->CommonRegs. serialPortInterfaceReg, ISP_NVRAM_MASK | qdev->eeprom_cmd_data |
--
1.4.2.rc2-dirty