From 4acac6a53a3c9dfc604a9a8647f16b0242080e93 Mon Sep 17 00:00:00 2001 From: Eilon Greenstein Date: Thu, 12 Feb 2009 08:36:52 +0000 Subject: [PATCH] bnx2x: GPIO accessories A GPIO is used with the 8726 PHY. Adding the GPIO related functions in this Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/bnx2x.h | 2 + drivers/net/bnx2x_main.c | 80 +++++++++++++++++++++++++++++++++++++++- drivers/net/bnx2x_reg.h | 29 +++++++++++++++ 3 files changed, 109 insertions(+), 2 deletions(-) diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h index 2397a891e1b..d66be72d832 100644 --- a/drivers/net/bnx2x.h +++ b/drivers/net/bnx2x.h @@ -982,7 +982,9 @@ struct bnx2x { void bnx2x_read_dmae(struct bnx2x *bp, u32 src_addr, u32 len32); void bnx2x_write_dmae(struct bnx2x *bp, dma_addr_t dma_addr, u32 dst_addr, u32 len32); +int bnx2x_get_gpio(struct bnx2x *bp, int gpio_num, u8 port); int bnx2x_set_gpio(struct bnx2x *bp, int gpio_num, u32 mode, u8 port); +int bnx2x_set_gpio_int(struct bnx2x *bp, int gpio_num, u32 mode, u8 port); static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms, int wait) diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 9c40b02b65f..95f8e58e73b 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -626,8 +626,8 @@ static void bnx2x_int_enable(struct bnx2x *bp) if (IS_E1HMF(bp)) { val = (0xee0f | (1 << (BP_E1HVN(bp) + 4))); if (bp->port.pmf) - /* enable nig attention */ - val |= 0x0100; + /* enable nig and gpio3 attention */ + val |= 0x1100; } else val = 0xffff; @@ -1836,6 +1836,36 @@ static void bnx2x_release_phy_lock(struct bnx2x *bp) mutex_unlock(&bp->port.phy_mutex); } +int bnx2x_get_gpio(struct bnx2x *bp, int gpio_num, u8 port) +{ + /* The GPIO should be swapped if swap register is set and active */ + int gpio_port = (REG_RD(bp, NIG_REG_PORT_SWAP) && + REG_RD(bp, NIG_REG_STRAP_OVERRIDE)) ^ port; + int gpio_shift = gpio_num + + (gpio_port ? MISC_REGISTERS_GPIO_PORT_SHIFT : 0); + u32 gpio_mask = (1 << gpio_shift); + u32 gpio_reg; + int value; + + if (gpio_num > MISC_REGISTERS_GPIO_3) { + BNX2X_ERR("Invalid GPIO %d\n", gpio_num); + return -EINVAL; + } + + /* read GPIO value */ + gpio_reg = REG_RD(bp, MISC_REG_GPIO); + + /* get the requested pin value */ + if ((gpio_reg & gpio_mask) == gpio_mask) + value = 1; + else + value = 0; + + DP(NETIF_MSG_LINK, "pin %d value 0x%x\n", gpio_num, value); + + return value; +} + int bnx2x_set_gpio(struct bnx2x *bp, int gpio_num, u32 mode, u8 port) { /* The GPIO should be swapped if swap register is set and active */ @@ -1889,6 +1919,52 @@ int bnx2x_set_gpio(struct bnx2x *bp, int gpio_num, u32 mode, u8 port) return 0; } +int bnx2x_set_gpio_int(struct bnx2x *bp, int gpio_num, u32 mode, u8 port) +{ + /* The GPIO should be swapped if swap register is set and active */ + int gpio_port = (REG_RD(bp, NIG_REG_PORT_SWAP) && + REG_RD(bp, NIG_REG_STRAP_OVERRIDE)) ^ port; + int gpio_shift = gpio_num + + (gpio_port ? MISC_REGISTERS_GPIO_PORT_SHIFT : 0); + u32 gpio_mask = (1 << gpio_shift); + u32 gpio_reg; + + if (gpio_num > MISC_REGISTERS_GPIO_3) { + BNX2X_ERR("Invalid GPIO %d\n", gpio_num); + return -EINVAL; + } + + bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_GPIO); + /* read GPIO int */ + gpio_reg = REG_RD(bp, MISC_REG_GPIO_INT); + + switch (mode) { + case MISC_REGISTERS_GPIO_INT_OUTPUT_CLR: + DP(NETIF_MSG_LINK, "Clear GPIO INT %d (shift %d) -> " + "output low\n", gpio_num, gpio_shift); + /* clear SET and set CLR */ + gpio_reg &= ~(gpio_mask << MISC_REGISTERS_GPIO_INT_SET_POS); + gpio_reg |= (gpio_mask << MISC_REGISTERS_GPIO_INT_CLR_POS); + break; + + case MISC_REGISTERS_GPIO_INT_OUTPUT_SET: + DP(NETIF_MSG_LINK, "Set GPIO INT %d (shift %d) -> " + "output high\n", gpio_num, gpio_shift); + /* clear CLR and set SET */ + gpio_reg &= ~(gpio_mask << MISC_REGISTERS_GPIO_INT_CLR_POS); + gpio_reg |= (gpio_mask << MISC_REGISTERS_GPIO_INT_SET_POS); + break; + + default: + break; + } + + REG_WR(bp, MISC_REG_GPIO_INT, gpio_reg); + bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_GPIO); + + return 0; +} + static int bnx2x_set_spio(struct bnx2x *bp, int spio_num, u32 mode) { u32 spio_mask = (1 << spio_num); diff --git a/drivers/net/bnx2x_reg.h b/drivers/net/bnx2x_reg.h index 713b5f9ea1e..6fc1d0df978 100644 --- a/drivers/net/bnx2x_reg.h +++ b/drivers/net/bnx2x_reg.h @@ -1438,6 +1438,29 @@ This is the result value of the pin; not the drive value. Writing these bits will have not effect. */ #define MISC_REG_GPIO 0xa490 +/* [RW 8] These bits enable the GPIO_INTs to signals event to the + IGU/MCP.according to the following map: [0] p0_gpio_0; [1] p0_gpio_1; [2] + p0_gpio_2; [3] p0_gpio_3; [4] p1_gpio_0; [5] p1_gpio_1; [6] p1_gpio_2; + [7] p1_gpio_3; */ +#define MISC_REG_GPIO_EVENT_EN 0xa2bc +/* [RW 32] GPIO INT. [31-28] OLD_CLR port1; [27-24] OLD_CLR port0; Writing a + '1' to these bit clears the corresponding bit in the #OLD_VALUE register. + This will acknowledge an interrupt on the falling edge of corresponding + GPIO input (reset value 0). [23-16] OLD_SET [23-16] port1; OLD_SET port0; + Writing a '1' to these bit sets the corresponding bit in the #OLD_VALUE + register. This will acknowledge an interrupt on the rising edge of + corresponding SPIO input (reset value 0). [15-12] OLD_VALUE [11-8] port1; + OLD_VALUE port0; RO; These bits indicate the old value of the GPIO input + value. When the ~INT_STATE bit is set; this bit indicates the OLD value + of the pin such that if ~INT_STATE is set and this bit is '0'; then the + interrupt is due to a low to high edge. If ~INT_STATE is set and this bit + is '1'; then the interrupt is due to a high to low edge (reset value 0). + [7-4] INT_STATE port1; [3-0] INT_STATE RO port0; These bits indicate the + current GPIO interrupt state for each GPIO pin. This bit is cleared when + the appropriate #OLD_SET or #OLD_CLR command bit is written. This bit is + set when the GPIO input does not match the current value in #OLD_VALUE + (reset value 0). */ +#define MISC_REG_GPIO_INT 0xa494 /* [R 28] this field hold the last information that caused reserved attention. bits [19:0] - address; [22:20] function; [23] reserved; [27:24] the master that caused the attention - according to the following @@ -5162,6 +5185,10 @@ #define MISC_REGISTERS_GPIO_FLOAT_POS 24 #define MISC_REGISTERS_GPIO_HIGH 1 #define MISC_REGISTERS_GPIO_INPUT_HI_Z 2 +#define MISC_REGISTERS_GPIO_INT_CLR_POS 24 +#define MISC_REGISTERS_GPIO_INT_OUTPUT_CLR 0 +#define MISC_REGISTERS_GPIO_INT_OUTPUT_SET 1 +#define MISC_REGISTERS_GPIO_INT_SET_POS 16 #define MISC_REGISTERS_GPIO_LOW 0 #define MISC_REGISTERS_GPIO_OUTPUT_HIGH 1 #define MISC_REGISTERS_GPIO_OUTPUT_LOW 0 @@ -5220,6 +5247,8 @@ #define AEU_INPUTS_ATTN_BITS_DMAE_HW_INTERRUPT (1<<11) #define AEU_INPUTS_ATTN_BITS_DOORBELLQ_HW_INTERRUPT (1<<13) #define AEU_INPUTS_ATTN_BITS_DOORBELLQ_PARITY_ERROR (1<<12) +#define AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_0 (1<<5) +#define AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_1 (1<<9) #define AEU_INPUTS_ATTN_BITS_IGU_PARITY_ERROR (1<<12) #define AEU_INPUTS_ATTN_BITS_MISC_HW_INTERRUPT (1<<15) #define AEU_INPUTS_ATTN_BITS_MISC_PARITY_ERROR (1<<14)