/**************************************************************************** * Driver for Solarflare Solarstorm network controllers and boards * Copyright 2007 Solarflare Communications Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation, incorporated herein by reference. */ /***************************************************************************** * Support for the SFE4001 NIC: driver code for the PCA9539 I/O expander that * controls the PHY power rails, and for the MAX6647 temp. sensor used to check * the PHY */ #include #include "efx.h" #include "phy.h" #include "boards.h" #include "falcon.h" #include "falcon_hwdefs.h" #include "mac.h" /************************************************************************** * * I2C IO Expander device * **************************************************************************/ #define PCA9539 0x74 #define P0_IN 0x00 #define P0_OUT 0x02 #define P0_INVERT 0x04 #define P0_CONFIG 0x06 #define P0_EN_1V0X_LBN 0 #define P0_EN_1V0X_WIDTH 1 #define P0_EN_1V2_LBN 1 #define P0_EN_1V2_WIDTH 1 #define P0_EN_2V5_LBN 2 #define P0_EN_2V5_WIDTH 1 #define P0_EN_3V3X_LBN 3 #define P0_EN_3V3X_WIDTH 1 #define P0_EN_5V_LBN 4 #define P0_EN_5V_WIDTH 1 #define P0_SHORTEN_JTAG_LBN 5 #define P0_SHORTEN_JTAG_WIDTH 1 #define P0_X_TRST_LBN 6 #define P0_X_TRST_WIDTH 1 #define P0_DSP_RESET_LBN 7 #define P0_DSP_RESET_WIDTH 1 #define P1_IN 0x01 #define P1_OUT 0x03 #define P1_INVERT 0x05 #define P1_CONFIG 0x07 #define P1_AFE_PWD_LBN 0 #define P1_AFE_PWD_WIDTH 1 #define P1_DSP_PWD25_LBN 1 #define P1_DSP_PWD25_WIDTH 1 #define P1_RESERVED_LBN 2 #define P1_RESERVED_WIDTH 2 #define P1_SPARE_LBN 4 #define P1_SPARE_WIDTH 4 /************************************************************************** * * Temperature Sensor * **************************************************************************/ #define MAX6647 0x4e #define RLTS 0x00 #define RLTE 0x01 #define RSL 0x02 #define RCL 0x03 #define RCRA 0x04 #define RLHN 0x05 #define RLLI 0x06 #define RRHI 0x07 #define RRLS 0x08 #define WCRW 0x0a #define WLHO 0x0b #define WRHA 0x0c #define WRLN 0x0e #define OSHT 0x0f #define REET 0x10 #define RIET 0x11 #define RWOE 0x19 #define RWOI 0x20 #define HYS 0x21 #define QUEUE 0x22 #define MFID 0xfe #define REVID 0xff /* Status bits */ #define MAX6647_BUSY (1 << 7) /* ADC is converting */ #define MAX6647_LHIGH (1 << 6) /* Local high temp. alarm */ #define MAX6647_LLOW (1 << 5) /* Local low temp. alarm */ #define MAX6647_RHIGH (1 << 4) /* Remote high temp. alarm */ #define MAX6647_RLOW (1 << 3) /* Remote low temp. alarm */ #define MAX6647_FAULT (1 << 2) /* DXN/DXP short/open circuit */ #define MAX6647_EOT (1 << 1) /* Remote junction overtemp. */ #define MAX6647_IOT (1 << 0) /* Local junction overtemp. */ static const u8 xgphy_max_temperature = 90; void sfe4001_poweroff(struct efx_nic *efx) { struct efx_i2c_interface *i2c = &efx->i2c; 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); /* Clear any over-temperature alert */ efx_i2c_read(i2c, MAX6647, RSL, &in, 1); } /* 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) { struct efx_i2c_interface *i2c = &efx->i2c; unsigned int count; int rc; u8 out, in, cfg; efx_dword_t reg; /* 10Xpress has fixed-function LED pins, so there is no board-specific * blink code. */ efx->board_info.blink = tenxpress_phy_blink; /* Ensure that XGXS and XAUI SerDes are held in reset */ EFX_POPULATE_DWORD_7(reg, XX_PWRDNA_EN, 1, XX_PWRDNB_EN, 1, XX_RSTPLLAB_EN, 1, XX_RESETA_EN, 1, XX_RESETB_EN, 1, XX_RSTXGXSRX_EN, 1, XX_RSTXGXSTX_EN, 1); falcon_xmac_writel(efx, ®, XX_PWR_RST_REG_MAC); udelay(10); /* 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); if (rc) goto fail1; /* Read it back and verify */ rc = efx_i2c_read(i2c, MAX6647, RLHN, &in, 1); if (rc) goto fail1; if (in != xgphy_max_temperature) { rc = -EFAULT; goto fail1; } /* Clear any previous over-temperature alert */ rc = efx_i2c_read(i2c, MAX6647, RSL, &in, 1); if (rc) goto fail1; /* Enable port 0 and port 1 outputs on IO expander */ cfg = 0x00; rc = efx_i2c_write(i2c, PCA9539, P0_CONFIG, &cfg, 1); if (rc) goto fail1; cfg = 0xff & ~(1 << P1_SPARE_LBN); rc = efx_i2c_write(i2c, PCA9539, P1_CONFIG, &cfg, 1); if (rc) goto fail2; /* 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); if (rc) goto fail3; schedule_timeout_uninterruptible(HZ); count = 0; do { /* Turn on 1.2V, 2.5V, 3.3V and 5V power rails */ 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); if (rc) goto fail3; msleep(10); /* Turn on 1V power rail */ out &= ~(1 << P0_EN_1V0X_LBN); rc = efx_i2c_write(i2c, PCA9539, P0_OUT, &out, 1); if (rc) goto fail3; 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)) 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; 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: return rc; }