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path: root/drivers/net/sfc/sfe4001.c
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Diffstat (limited to 'drivers/net/sfc/sfe4001.c')
-rw-r--r--drivers/net/sfc/sfe4001.c140
1 files changed, 80 insertions, 60 deletions
diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c
index 11fa9fb8f48b..b27849523990 100644
--- a/drivers/net/sfc/sfe4001.c
+++ b/drivers/net/sfc/sfe4001.c
@@ -106,42 +106,62 @@
static const u8 xgphy_max_temperature = 90;
-void sfe4001_poweroff(struct efx_nic *efx)
+static void sfe4001_poweroff(struct efx_nic *efx)
{
- struct efx_i2c_interface *i2c = &efx->i2c;
+ struct i2c_client *ioexp_client = efx->board_info.ioexp_client;
+ struct i2c_client *hwmon_client = efx->board_info.hwmon_client;
- u8 cfg, out, in;
+ /* Turn off all power rails and disable outputs */
+ i2c_smbus_write_byte_data(ioexp_client, P0_OUT, 0xff);
+ i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG, 0xff);
+ i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff);
- EFX_INFO(efx, "%s\n", __func__);
-
- /* Turn off all power rails */
- out = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
-
- /* Disable port 1 outputs on IO expander */
- cfg = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P1_CONFIG, &cfg, 1);
+ /* Clear any over-temperature alert */
+ i2c_smbus_read_byte_data(hwmon_client, RSL);
+}
- /* Disable port 0 outputs on IO expander */
- cfg = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P0_CONFIG, &cfg, 1);
+static void sfe4001_fini(struct efx_nic *efx)
+{
+ EFX_INFO(efx, "%s\n", __func__);
- /* Clear any over-temperature alert */
- (void) efx_i2c_read(i2c, MAX6647, RSL, &in, 1);
+ sfe4001_poweroff(efx);
+ i2c_unregister_device(efx->board_info.ioexp_client);
+ i2c_unregister_device(efx->board_info.hwmon_client);
}
+/* The P0_EN_3V3X line on SFE4001 boards (from A2 onward) is connected
+ * to the FLASH_CFG_1 input on the DSP. We must keep it high at power-
+ * up to allow writing the flash (done through MDIO from userland).
+ */
+unsigned int sfe4001_phy_flash_cfg;
+module_param_named(phy_flash_cfg, sfe4001_phy_flash_cfg, uint, 0444);
+MODULE_PARM_DESC(phy_flash_cfg,
+ "Force PHY to enter flash configuration mode");
+
/* This board uses an I2C expander to provider power to the PHY, which needs to
* be turned on before the PHY can be used.
* Context: Process context, rtnl lock held
*/
-int sfe4001_poweron(struct efx_nic *efx)
+int sfe4001_init(struct efx_nic *efx)
{
- struct efx_i2c_interface *i2c = &efx->i2c;
+ struct i2c_client *hwmon_client, *ioexp_client;
unsigned int count;
int rc;
- u8 out, in, cfg;
+ u8 out;
efx_dword_t reg;
+ hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647);
+ if (!hwmon_client)
+ return -EIO;
+ efx->board_info.hwmon_client = hwmon_client;
+
+ ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539);
+ if (!ioexp_client) {
+ rc = -EIO;
+ goto fail_hwmon;
+ }
+ efx->board_info.ioexp_client = ioexp_client;
+
/* 10Xpress has fixed-function LED pins, so there is no board-specific
* blink code. */
efx->board_info.blink = tenxpress_phy_blink;
@@ -157,44 +177,45 @@ int sfe4001_poweron(struct efx_nic *efx)
falcon_xmac_writel(efx, &reg, XX_PWR_RST_REG_MAC);
udelay(10);
+ efx->board_info.fini = sfe4001_fini;
+
/* Set DSP over-temperature alert threshold */
EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature);
- rc = efx_i2c_write(i2c, MAX6647, WLHO,
- &xgphy_max_temperature, 1);
+ rc = i2c_smbus_write_byte_data(hwmon_client, WLHO,
+ xgphy_max_temperature);
if (rc)
- goto fail1;
+ goto fail_ioexp;
/* Read it back and verify */
- rc = efx_i2c_read(i2c, MAX6647, RLHN, &in, 1);
- if (rc)
- goto fail1;
- if (in != xgphy_max_temperature) {
+ rc = i2c_smbus_read_byte_data(hwmon_client, RLHN);
+ if (rc < 0)
+ goto fail_ioexp;
+ if (rc != xgphy_max_temperature) {
rc = -EFAULT;
- goto fail1;
+ goto fail_ioexp;
}
/* Clear any previous over-temperature alert */
- rc = efx_i2c_read(i2c, MAX6647, RSL, &in, 1);
- if (rc)
- goto fail1;
+ rc = i2c_smbus_read_byte_data(hwmon_client, RSL);
+ if (rc < 0)
+ goto fail_ioexp;
/* Enable port 0 and port 1 outputs on IO expander */
- cfg = 0x00;
- rc = efx_i2c_write(i2c, PCA9539, P0_CONFIG, &cfg, 1);
+ rc = i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0x00);
if (rc)
- goto fail1;
- cfg = 0xff & ~(1 << P1_SPARE_LBN);
- rc = efx_i2c_write(i2c, PCA9539, P1_CONFIG, &cfg, 1);
+ goto fail_ioexp;
+ rc = i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG,
+ 0xff & ~(1 << P1_SPARE_LBN));
if (rc)
- goto fail2;
+ goto fail_on;
/* Turn all power off then wait 1 sec. This ensures PHY is reset */
out = 0xff & ~((0 << P0_EN_1V2_LBN) | (0 << P0_EN_2V5_LBN) |
(0 << P0_EN_3V3X_LBN) | (0 << P0_EN_5V_LBN) |
(0 << P0_EN_1V0X_LBN));
- rc = efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
+ rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
if (rc)
- goto fail3;
+ goto fail_on;
schedule_timeout_uninterruptible(HZ);
count = 0;
@@ -203,50 +224,49 @@ int sfe4001_poweron(struct efx_nic *efx)
out = 0xff & ~((1 << P0_EN_1V2_LBN) | (1 << P0_EN_2V5_LBN) |
(1 << P0_EN_3V3X_LBN) | (1 << P0_EN_5V_LBN) |
(1 << P0_X_TRST_LBN));
+ if (sfe4001_phy_flash_cfg)
+ out |= 1 << P0_EN_3V3X_LBN;
- rc = efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
+ rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
if (rc)
- goto fail3;
+ goto fail_on;
msleep(10);
/* Turn on 1V power rail */
out &= ~(1 << P0_EN_1V0X_LBN);
- rc = efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
+ rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out);
if (rc)
- goto fail3;
+ goto fail_on;
EFX_INFO(efx, "waiting for power (attempt %d)...\n", count);
schedule_timeout_uninterruptible(HZ);
/* Check DSP is powered */
- rc = efx_i2c_read(i2c, PCA9539, P1_IN, &in, 1);
- if (rc)
- goto fail3;
- if (in & (1 << P1_AFE_PWD_LBN))
+ rc = i2c_smbus_read_byte_data(ioexp_client, P1_IN);
+ if (rc < 0)
+ goto fail_on;
+ if (rc & (1 << P1_AFE_PWD_LBN))
goto done;
+ /* DSP doesn't look powered in flash config mode */
+ if (sfe4001_phy_flash_cfg)
+ goto done;
} while (++count < 20);
EFX_INFO(efx, "timed out waiting for power\n");
rc = -ETIMEDOUT;
- goto fail3;
+ goto fail_on;
done:
EFX_INFO(efx, "PHY is powered on\n");
return 0;
-fail3:
- /* Turn off all power rails */
- out = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
- /* Disable port 1 outputs on IO expander */
- out = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P1_CONFIG, &out, 1);
-fail2:
- /* Disable port 0 outputs on IO expander */
- out = 0xff;
- (void) efx_i2c_write(i2c, PCA9539, P0_CONFIG, &out, 1);
-fail1:
+fail_on:
+ sfe4001_poweroff(efx);
+fail_ioexp:
+ i2c_unregister_device(ioexp_client);
+fail_hwmon:
+ i2c_unregister_device(hwmon_client);
return rc;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 18:40:53 +0000