/* * * Copyright (C) 2002 Intersil Americas Inc. * Copyright (C) 2003-2004 Luis R. Rodriguez * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include "isl_38xx.h" #include "islpci_dev.h" #include "islsm_log.h" /****************************************************************************** Device Interface & Control functions ******************************************************************************/ /** * isl38xx_disable_interrupts - disable all interrupts * @device: pci memory base address * * Instructs the device to disable all interrupt reporting by asserting * the IRQ line. New events may still show up in the interrupt identification * register located at offset %ISL38XX_INT_IDENT_REG. */ void isl38xx_disable_interrupts(void __iomem *device) { isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG); udelay(ISL38XX_WRITEIO_DELAY); } void isl38xx_handle_sleep_request(isl38xx_control_block *control_block, int *powerstate, void __iomem *device_base) { /* device requests to go into sleep mode * check whether the transmit queues for data and management are empty */ if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)) /* data tx queue not empty */ return; if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ)) /* management tx queue not empty */ return; /* check also whether received frames are pending */ if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ)) /* data rx queue not empty */ return; if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ)) /* management rx queue not empty */ return; islog(L_DEBUG, "Device going to sleep mode\n"); /* all queues are empty, allow the device to go into sleep mode */ *powerstate = ISL38XX_PSM_POWERSAVE_STATE; /* assert the Sleep interrupt in the Device Interrupt Register */ isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP, ISL38XX_DEV_INT_REG); udelay(ISL38XX_WRITEIO_DELAY); } void isl38xx_handle_wakeup(isl38xx_control_block *control_block, int *powerstate, void __iomem *device_base) { /* device is in active state, update the powerstate flag */ *powerstate = ISL38XX_PSM_ACTIVE_STATE; /* now check whether there are frames pending for the card */ if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ) && !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ)) return; islog(L_DEBUG, "Wake up handler trigger the device\n"); /* either data or management transmit queue has a frame pending * trigger the device by setting the Update bit in the Device Int reg */ isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE, ISL38XX_DEV_INT_REG); udelay(ISL38XX_WRITEIO_DELAY); } void isl38xx_trigger_device(int asleep, void __iomem *device_base) { u32 reg, counter = 0; FN_ENTER; /* check whether the device is in power save mode */ if (asleep) { /* device is in powersave, trigger the device for wakeup */ reg = readl(device_base + ISL38XX_INT_IDENT_REG); if (reg == 0xabadface) { printk(KERN_ERR "%s: Device register abadface\n", DRV_NAME); /* read the Device Status Register until Sleepmode bit is set */ while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG), (reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) { udelay(ISL38XX_WRITEIO_DELAY); counter++; if (counter > 1000) { printk(KERN_WARNING "%s: device didn't wake from sleep", DRV_NAME); break; } } } /* assert the Wakeup interrupt in the Device Interrupt Register */ isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP, ISL38XX_DEV_INT_REG); udelay(ISL38XX_WRITEIO_DELAY); /* perform another read on the Device Status Register */ reg = readl(device_base + ISL38XX_CTRL_STAT_REG); udelay(ISL38XX_WRITEIO_DELAY); } else { /* device is (still) awake */ islog(L_DEBUG, "Device is in active state\n"); /* trigger the device by setting the Update bit in the Device Int reg */ isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE, ISL38XX_DEV_INT_REG); udelay(ISL38XX_WRITEIO_DELAY); } FN_EXIT0; } void isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address) { FN_ENTER; /* load the address of the control block in the device */ isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG); udelay(ISL38XX_WRITEIO_DELAY); /* set the reset bit in the Device Interrupt Register */ isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG); udelay(ISL38XX_WRITEIO_DELAY); /* enable the interrupt for detecting initialization */ /* Note: Do not enable other interrupts here. We want the * device to have come up first 100% before allowing any other * interrupts. */ isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG); udelay(ISL38XX_WRITEIO_DELAY); /* allow complete full reset */ FN_EXIT0; } void isl38xx_enable_common_interrupts(void __iomem *device_base) { u32 reg; reg = (ISL38XX_INT_IDENT_UPDATE | ISL38XX_INT_IDENT_SLEEP | ISL38XX_INT_IDENT_WAKEUP); isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG); udelay(ISL38XX_WRITEIO_DELAY); } // will i need this ? int isl38xx_in_queue(isl38xx_control_block *cb, int queue) { const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) - le32_to_cpu(cb->device_curr_frag[queue])); /* determine the amount of fragments in the queue depending on the type * of the queue, either transmit or receive */ BUG_ON(delta < 0); /* driver ptr must be ahead of device ptr */ switch (queue) { /* send queues */ case ISL38XX_CB_TX_MGMTQ: BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE); case ISL38XX_CB_TX_DATA_LQ: BUG_ON(delta > ISL38XX_CB_TX_DATA_QSIZE); return delta; break; /* receive queues */ case ISL38XX_CB_RX_MGMTQ: BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE); return ISL38XX_CB_MGMT_QSIZE - delta; break; case ISL38XX_CB_RX_DATA_LQ: BUG_ON(delta > ISL38XX_CB_RX_DATA_QSIZE); return ISL38XX_CB_RX_DATA_QSIZE - delta; break; } BUG(); return 0; } // TODO SOFTMAC : factor here code from ether and mgmt relative to queue // management (tx, assuredly rx too). // this means this file becomes isl_38xx_pci.c ; has a pending // isl_38xx_usb.c containing usb_transport.c.no ? // pcidev is associated with usb_init.c. // Actually i don't quite understand the frontier between isl_38xx.c and // islpci_dev.c