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sfc: Use kernel I2C system and i2c-algo-bit driver

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Remove our own implementation of I2C bit-banging.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Ben Hutchings
2008-05-30 22:27:04 +01:00
committed by Jeff Garzik
parent 9e833be3a1
commit 37b5a60335
10 changed files with 134 additions and 560 deletions
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128
drivers/net/sfc/sfe4001.c
View File

@@ -106,28 +106,27 @@
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;
EFX_INFO(efx, "%s\n", __func__);
/* Turn off all power rails */
out = 0xff;
efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
/* Disable port 1 outputs on IO expander */
cfg = 0xff;
efx_i2c_write(i2c, PCA9539, P1_CONFIG, &cfg, 1);
/* Disable port 0 outputs on IO expander */
cfg = 0xff;
efx_i2c_write(i2c, PCA9539, P0_CONFIG, &cfg, 1);
/* 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);
/* Clear any over-temperature alert */
efx_i2c_read(i2c, MAX6647, RSL, &in, 1);
i2c_smbus_read_byte_data(hwmon_client, RSL);
}
static void sfe4001_fini(struct efx_nic *efx)
{
EFX_INFO(efx, "%s\n", __func__);
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
@@ -143,14 +142,26 @@ MODULE_PARM_DESC(phy_flash_cfg,
* 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;
@@ -166,44 +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;
@@ -215,26 +227,26 @@ int sfe4001_poweron(struct efx_nic *efx)
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 */
@@ -244,23 +256,17 @@ int sfe4001_poweron(struct efx_nic *efx)
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;
efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1);
/* Disable port 1 outputs on IO expander */
out = 0xff;
efx_i2c_write(i2c, PCA9539, P1_CONFIG, &out, 1);
fail2:
/* Disable port 0 outputs on IO expander */
out = 0xff;
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;
}