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Date: Thu, 12 Feb 2009 20:36:52 +0200
From: "Eilon Greenstein" <eilong@...adcom.com>
To: "David Miller" <davem@...emloft.net>
cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 13/41]bnx2x: GPIO accessories
Subject: [PATCH 13/41]bnx2x: GPIO accessories
A GPIO is used with the 8726 PHY. Adding the GPIO related functions in this
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
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 2397a89..d66be72 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 9c40b02..95f8e58 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 713b5f9..6fc1d0d 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)
--
1.5.4.3
--
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