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bnx2x: GPIO accessories
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A GPIO is used with the 8726 PHY. Adding the GPIO related functions in this

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Eilon Greenstein authored and David S. Miller committed Feb 16, 2009
1 parent 87942b4 commit 4acac6a
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Showing 3 changed files with 109 additions and 2 deletions.
2 changes: 2 additions & 0 deletions drivers/net/bnx2x.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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)
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80 changes: 78 additions & 2 deletions drivers/net/bnx2x_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;

Expand Down Expand Up @@ -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 */
Expand Down Expand Up @@ -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);
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29 changes: 29 additions & 0 deletions drivers/net/bnx2x_reg.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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
Expand Down Expand Up @@ -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)
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