| /* |
| * |
| * Copyright (C) 2002 Intersil Americas Inc. |
| * Copyright (C) 2003-2004 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>_ |
| * |
| * 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 <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| |
| #include "prismcompat.h" |
| #include "isl_38xx.h" |
| #include "islpci_dev.h" |
| #include "islpci_mgt.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; |
| |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| DEBUG(SHOW_TRACING, "Device going to sleep mode\n"); |
| #endif |
| |
| /* 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; |
| |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n"); |
| #endif |
| |
| /* 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; |
| |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| struct timeval current_time; |
| DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n"); |
| #endif |
| |
| /* check whether the device is in power save mode */ |
| if (asleep) { |
| /* device is in powersave, trigger the device for wakeup */ |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| do_gettimeofday(¤t_time); |
| DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n", |
| current_time.tv_sec, (long)current_time.tv_usec); |
| |
| DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n", |
| current_time.tv_sec, (long)current_time.tv_usec, |
| readl(device_base + ISL38XX_CTRL_STAT_REG)); |
| #endif |
| udelay(ISL38XX_WRITEIO_DELAY); |
| |
| reg = readl(device_base + ISL38XX_INT_IDENT_REG); |
| if (reg == 0xabadface) { |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| do_gettimeofday(¤t_time); |
| DEBUG(SHOW_TRACING, |
| "%08li.%08li Device register abadface\n", |
| current_time.tv_sec, (long)current_time.tv_usec); |
| #endif |
| /* 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 VERBOSE > SHOW_ERROR_MESSAGES |
| DEBUG(SHOW_TRACING, |
| "%08li.%08li Device register read %08x\n", |
| current_time.tv_sec, (long)current_time.tv_usec, |
| readl(device_base + ISL38XX_CTRL_STAT_REG)); |
| #endif |
| udelay(ISL38XX_WRITEIO_DELAY); |
| |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| do_gettimeofday(¤t_time); |
| DEBUG(SHOW_TRACING, |
| "%08li.%08li Device asleep counter %i\n", |
| current_time.tv_sec, (long)current_time.tv_usec, |
| counter); |
| #endif |
| } |
| /* 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); |
| |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| do_gettimeofday(¤t_time); |
| DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n", |
| current_time.tv_sec, (long)current_time.tv_usec, reg); |
| #endif |
| } else { |
| /* device is (still) awake */ |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| DEBUG(SHOW_TRACING, "Device is in active state\n"); |
| #endif |
| /* 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_interface_reset(void __iomem *device_base, dma_addr_t host_address) |
| { |
| #if VERBOSE > SHOW_ERROR_MESSAGES |
| DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n"); |
| #endif |
| |
| /* 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 */ |
| } |
| |
| 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); |
| } |
| |
| 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: |
| case ISL38XX_CB_TX_DATA_HQ: |
| BUG_ON(delta > ISL38XX_CB_TX_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: |
| case ISL38XX_CB_RX_DATA_HQ: |
| BUG_ON(delta > ISL38XX_CB_RX_QSIZE); |
| return ISL38XX_CB_RX_QSIZE - delta; |
| break; |
| } |
| BUG(); |
| return 0; |
| } |