1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2007-2008 Solarflare Communications Inc.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
10 /*****************************************************************************
11 * Support for the SFE4001 and SFN4111T NICs.
13 * The SFE4001 does not power-up fully at reset due to its high power
14 * consumption. We control its power via a PCA9539 I/O expander.
15 * Both boards have a MAX6647 temperature monitor which we expose to
18 * This also provides minimal support for reflashing the PHY, which is
19 * initiated by resetting it with the FLASH_CFG_1 pin pulled down.
20 * On SFE4001 rev A2 and later this is connected to the 3V3X output of
21 * the IO-expander; on the SFN4111T it is connected to Falcon's GPIO3.
22 * We represent reflash mode as PHY_MODE_SPECIAL and make it mutually
23 * exclusive with the network device being open.
26 #include <linux/delay.h>
27 #include <linux/rtnetlink.h>
28 #include "net_driver.h"
33 #include "falcon_hwdefs.h"
34 #include "falcon_io.h"
36 #include "workarounds.h"
38 /**************************************************************************
40 * I2C IO Expander device
42 **************************************************************************/
47 #define P0_INVERT 0x04
48 #define P0_CONFIG 0x06
50 #define P0_EN_1V0X_LBN 0
51 #define P0_EN_1V0X_WIDTH 1
52 #define P0_EN_1V2_LBN 1
53 #define P0_EN_1V2_WIDTH 1
54 #define P0_EN_2V5_LBN 2
55 #define P0_EN_2V5_WIDTH 1
56 #define P0_EN_3V3X_LBN 3
57 #define P0_EN_3V3X_WIDTH 1
58 #define P0_EN_5V_LBN 4
59 #define P0_EN_5V_WIDTH 1
60 #define P0_SHORTEN_JTAG_LBN 5
61 #define P0_SHORTEN_JTAG_WIDTH 1
62 #define P0_X_TRST_LBN 6
63 #define P0_X_TRST_WIDTH 1
64 #define P0_DSP_RESET_LBN 7
65 #define P0_DSP_RESET_WIDTH 1
69 #define P1_INVERT 0x05
70 #define P1_CONFIG 0x07
72 #define P1_AFE_PWD_LBN 0
73 #define P1_AFE_PWD_WIDTH 1
74 #define P1_DSP_PWD25_LBN 1
75 #define P1_DSP_PWD25_WIDTH 1
76 #define P1_RESERVED_LBN 2
77 #define P1_RESERVED_WIDTH 2
78 #define P1_SPARE_LBN 4
79 #define P1_SPARE_WIDTH 4
81 /* Temperature Sensor */
82 #define MAX664X_REG_RSL 0x02
83 #define MAX664X_REG_WLHO 0x0B
85 static void sfe4001_poweroff(struct efx_nic
*efx
)
87 struct i2c_client
*ioexp_client
= efx
->board_info
.ioexp_client
;
88 struct i2c_client
*hwmon_client
= efx
->board_info
.hwmon_client
;
90 /* Turn off all power rails and disable outputs */
91 i2c_smbus_write_byte_data(ioexp_client
, P0_OUT
, 0xff);
92 i2c_smbus_write_byte_data(ioexp_client
, P1_CONFIG
, 0xff);
93 i2c_smbus_write_byte_data(ioexp_client
, P0_CONFIG
, 0xff);
95 /* Clear any over-temperature alert */
96 i2c_smbus_read_byte_data(hwmon_client
, MAX664X_REG_RSL
);
99 static int sfe4001_poweron(struct efx_nic
*efx
)
101 struct i2c_client
*hwmon_client
= efx
->board_info
.hwmon_client
;
102 struct i2c_client
*ioexp_client
= efx
->board_info
.ioexp_client
;
107 /* Clear any previous over-temperature alert */
108 rc
= i2c_smbus_read_byte_data(hwmon_client
, MAX664X_REG_RSL
);
112 /* Enable port 0 and port 1 outputs on IO expander */
113 rc
= i2c_smbus_write_byte_data(ioexp_client
, P0_CONFIG
, 0x00);
116 rc
= i2c_smbus_write_byte_data(ioexp_client
, P1_CONFIG
,
117 0xff & ~(1 << P1_SPARE_LBN
));
121 /* If PHY power is on, turn it all off and wait 1 second to
122 * ensure a full reset.
124 rc
= i2c_smbus_read_byte_data(ioexp_client
, P0_OUT
);
127 out
= 0xff & ~((0 << P0_EN_1V2_LBN
) | (0 << P0_EN_2V5_LBN
) |
128 (0 << P0_EN_3V3X_LBN
) | (0 << P0_EN_5V_LBN
) |
129 (0 << P0_EN_1V0X_LBN
));
131 EFX_INFO(efx
, "power-cycling PHY\n");
132 rc
= i2c_smbus_write_byte_data(ioexp_client
, P0_OUT
, out
);
135 schedule_timeout_uninterruptible(HZ
);
138 for (i
= 0; i
< 20; ++i
) {
139 /* Turn on 1.2V, 2.5V, 3.3V and 5V power rails */
140 out
= 0xff & ~((1 << P0_EN_1V2_LBN
) | (1 << P0_EN_2V5_LBN
) |
141 (1 << P0_EN_3V3X_LBN
) | (1 << P0_EN_5V_LBN
) |
142 (1 << P0_X_TRST_LBN
));
143 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
144 out
|= 1 << P0_EN_3V3X_LBN
;
146 rc
= i2c_smbus_write_byte_data(ioexp_client
, P0_OUT
, out
);
151 /* Turn on 1V power rail */
152 out
&= ~(1 << P0_EN_1V0X_LBN
);
153 rc
= i2c_smbus_write_byte_data(ioexp_client
, P0_OUT
, out
);
157 EFX_INFO(efx
, "waiting for DSP boot (attempt %d)...\n", i
);
159 /* In flash config mode, DSP does not turn on AFE, so
160 * just wait 1 second.
162 if (efx
->phy_mode
& PHY_MODE_SPECIAL
) {
163 schedule_timeout_uninterruptible(HZ
);
167 for (j
= 0; j
< 10; ++j
) {
170 /* Check DSP has asserted AFE power line */
171 rc
= i2c_smbus_read_byte_data(ioexp_client
, P1_IN
);
174 if (rc
& (1 << P1_AFE_PWD_LBN
))
179 EFX_INFO(efx
, "timed out waiting for DSP boot\n");
182 sfe4001_poweroff(efx
);
186 static int sfn4111t_reset(struct efx_nic
*efx
)
190 /* GPIO pins are also used for I2C, so block that temporarily */
191 mutex_lock(&efx
->i2c_adap
.bus_lock
);
193 falcon_read(efx
, ®
, GPIO_CTL_REG_KER
);
194 EFX_SET_OWORD_FIELD(reg
, GPIO2_OEN
, true);
195 EFX_SET_OWORD_FIELD(reg
, GPIO2_OUT
, false);
196 falcon_write(efx
, ®
, GPIO_CTL_REG_KER
);
198 EFX_SET_OWORD_FIELD(reg
, GPIO2_OUT
, true);
199 EFX_SET_OWORD_FIELD(reg
, GPIO3_OEN
, true);
200 EFX_SET_OWORD_FIELD(reg
, GPIO3_OUT
,
201 !(efx
->phy_mode
& PHY_MODE_SPECIAL
));
202 falcon_write(efx
, ®
, GPIO_CTL_REG_KER
);
204 mutex_unlock(&efx
->i2c_adap
.bus_lock
);
210 static ssize_t
show_phy_flash_cfg(struct device
*dev
,
211 struct device_attribute
*attr
, char *buf
)
213 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
214 return sprintf(buf
, "%d\n", !!(efx
->phy_mode
& PHY_MODE_SPECIAL
));
217 static ssize_t
set_phy_flash_cfg(struct device
*dev
,
218 struct device_attribute
*attr
,
219 const char *buf
, size_t count
)
221 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
222 enum efx_phy_mode old_mode
, new_mode
;
226 old_mode
= efx
->phy_mode
;
227 if (count
== 0 || *buf
== '0')
228 new_mode
= old_mode
& ~PHY_MODE_SPECIAL
;
230 new_mode
= PHY_MODE_SPECIAL
;
231 if (old_mode
== new_mode
) {
233 } else if (efx
->state
!= STATE_RUNNING
|| netif_running(efx
->net_dev
)) {
236 efx
->phy_mode
= new_mode
;
237 if (efx
->board_info
.type
== EFX_BOARD_SFE4001
)
238 err
= sfe4001_poweron(efx
);
240 err
= sfn4111t_reset(efx
);
241 efx_reconfigure_port(efx
);
245 return err
? err
: count
;
248 static DEVICE_ATTR(phy_flash_cfg
, 0644, show_phy_flash_cfg
, set_phy_flash_cfg
);
250 static void sfe4001_fini(struct efx_nic
*efx
)
252 EFX_INFO(efx
, "%s\n", __func__
);
254 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_flash_cfg
);
255 sfe4001_poweroff(efx
);
256 i2c_unregister_device(efx
->board_info
.ioexp_client
);
257 i2c_unregister_device(efx
->board_info
.hwmon_client
);
260 static int sfe4001_check_hw(struct efx_nic
*efx
)
264 /* If XAUI link is up then do not monitor */
265 if (EFX_WORKAROUND_7884(efx
) && efx
->mac_up
)
268 /* Check the powered status of the PHY. Lack of power implies that
269 * the MAX6647 has shut down power to it, probably due to a temp.
270 * alarm. Reading the power status rather than the MAX6647 status
271 * directly because the later is read-to-clear and would thus
272 * start to power up the PHY again when polled, causing us to blip
273 * the power undesirably.
274 * We know we can read from the IO expander because we did
275 * it during power-on. Assume failure now is bad news. */
276 status
= i2c_smbus_read_byte_data(efx
->board_info
.ioexp_client
, P1_IN
);
278 (status
& ((1 << P1_AFE_PWD_LBN
) | (1 << P1_DSP_PWD25_LBN
))) != 0)
281 /* Use board power control, not PHY power control */
282 sfe4001_poweroff(efx
);
283 efx
->phy_mode
= PHY_MODE_OFF
;
285 return (status
< 0) ? -EIO
: -ERANGE
;
288 static struct i2c_board_info sfe4001_hwmon_info
= {
289 I2C_BOARD_INFO("max6647", 0x4e),
293 /* This board uses an I2C expander to provider power to the PHY, which needs to
294 * be turned on before the PHY can be used.
295 * Context: Process context, rtnl lock held
297 int sfe4001_init(struct efx_nic
*efx
)
301 #if defined(CONFIG_SENSORS_LM90) || defined(CONFIG_SENSORS_LM90_MODULE)
302 efx
->board_info
.hwmon_client
=
303 i2c_new_device(&efx
->i2c_adap
, &sfe4001_hwmon_info
);
305 efx
->board_info
.hwmon_client
=
306 i2c_new_dummy(&efx
->i2c_adap
, sfe4001_hwmon_info
.addr
);
308 if (!efx
->board_info
.hwmon_client
)
311 /* Raise board/PHY high limit from 85 to 90 degrees Celsius */
312 rc
= i2c_smbus_write_byte_data(efx
->board_info
.hwmon_client
,
313 MAX664X_REG_WLHO
, 90);
317 efx
->board_info
.ioexp_client
= i2c_new_dummy(&efx
->i2c_adap
, PCA9539
);
318 if (!efx
->board_info
.ioexp_client
) {
323 /* 10Xpress has fixed-function LED pins, so there is no board-specific
325 efx
->board_info
.blink
= tenxpress_phy_blink
;
327 efx
->board_info
.monitor
= sfe4001_check_hw
;
328 efx
->board_info
.fini
= sfe4001_fini
;
330 rc
= sfe4001_poweron(efx
);
334 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_flash_cfg
);
338 EFX_INFO(efx
, "PHY is powered on\n");
342 sfe4001_poweroff(efx
);
344 i2c_unregister_device(efx
->board_info
.ioexp_client
);
346 i2c_unregister_device(efx
->board_info
.hwmon_client
);
350 static int sfn4111t_check_hw(struct efx_nic
*efx
)
354 /* If XAUI link is up then do not monitor */
355 if (EFX_WORKAROUND_7884(efx
) && efx
->mac_up
)
358 /* Test LHIGH, RHIGH, FAULT, EOT and IOT alarms */
359 status
= i2c_smbus_read_byte_data(efx
->board_info
.hwmon_client
,
368 static void sfn4111t_fini(struct efx_nic
*efx
)
370 EFX_INFO(efx
, "%s\n", __func__
);
372 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_flash_cfg
);
373 i2c_unregister_device(efx
->board_info
.hwmon_client
);
376 static struct i2c_board_info sfn4111t_hwmon_info
= {
377 I2C_BOARD_INFO("max6647", 0x4e),
381 int sfn4111t_init(struct efx_nic
*efx
)
385 efx
->board_info
.hwmon_client
=
386 i2c_new_device(&efx
->i2c_adap
, &sfn4111t_hwmon_info
);
387 if (!efx
->board_info
.hwmon_client
)
390 efx
->board_info
.blink
= tenxpress_phy_blink
;
391 efx
->board_info
.monitor
= sfn4111t_check_hw
;
392 efx
->board_info
.fini
= sfn4111t_fini
;
394 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_flash_cfg
);
398 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
404 i2c_unregister_device(efx
->board_info
.hwmon_client
);