3 * Copyright (C) 2002 Intersil Americas Inc.
4 * Copyright (C) 2003-2004 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>_
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/version.h>
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
26 #include <asm/uaccess.h>
29 #include "prismcompat.h"
31 #include "islpci_dev.h"
32 #include "islpci_mgt.h"
34 /******************************************************************************
35 Device Interface & Control functions
36 ******************************************************************************/
39 * isl38xx_disable_interrupts - disable all interrupts
40 * @device: pci memory base address
42 * Instructs the device to disable all interrupt reporting by asserting
43 * the IRQ line. New events may still show up in the interrupt identification
44 * register located at offset %ISL38XX_INT_IDENT_REG.
47 isl38xx_disable_interrupts(void __iomem *device)
49 isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG);
50 udelay(ISL38XX_WRITEIO_DELAY);
54 isl38xx_handle_sleep_request(isl38xx_control_block *control_block,
55 int *powerstate, void __iomem *device_base)
57 /* device requests to go into sleep mode
58 * check whether the transmit queues for data and management are empty */
59 if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ))
60 /* data tx queue not empty */
63 if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
64 /* management tx queue not empty */
67 /* check also whether received frames are pending */
68 if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ))
69 /* data rx queue not empty */
72 if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ))
73 /* management rx queue not empty */
76 #if VERBOSE > SHOW_ERROR_MESSAGES
77 DEBUG(SHOW_TRACING, "Device going to sleep mode\n");
80 /* all queues are empty, allow the device to go into sleep mode */
81 *powerstate = ISL38XX_PSM_POWERSAVE_STATE;
83 /* assert the Sleep interrupt in the Device Interrupt Register */
84 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP,
86 udelay(ISL38XX_WRITEIO_DELAY);
90 isl38xx_handle_wakeup(isl38xx_control_block *control_block,
91 int *powerstate, void __iomem *device_base)
93 /* device is in active state, update the powerstate flag */
94 *powerstate = ISL38XX_PSM_ACTIVE_STATE;
96 /* now check whether there are frames pending for the card */
97 if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)
98 && !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
101 #if VERBOSE > SHOW_ERROR_MESSAGES
102 DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n");
105 /* either data or management transmit queue has a frame pending
106 * trigger the device by setting the Update bit in the Device Int reg */
107 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
108 ISL38XX_DEV_INT_REG);
109 udelay(ISL38XX_WRITEIO_DELAY);
113 isl38xx_trigger_device(int asleep, void __iomem *device_base)
115 u32 reg, counter = 0;
117 #if VERBOSE > SHOW_ERROR_MESSAGES
118 struct timeval current_time;
119 DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n");
122 /* check whether the device is in power save mode */
124 /* device is in powersave, trigger the device for wakeup */
125 #if VERBOSE > SHOW_ERROR_MESSAGES
126 do_gettimeofday(¤t_time);
127 DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n",
128 current_time.tv_sec, (long)current_time.tv_usec);
130 DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
131 current_time.tv_sec, (long)current_time.tv_usec,
132 readl(device_base + ISL38XX_CTRL_STAT_REG));
134 udelay(ISL38XX_WRITEIO_DELAY);
136 reg = readl(device_base + ISL38XX_INT_IDENT_REG);
137 if (reg == 0xabadface) {
138 #if VERBOSE > SHOW_ERROR_MESSAGES
139 do_gettimeofday(¤t_time);
141 "%08li.%08li Device register abadface\n",
142 current_time.tv_sec, (long)current_time.tv_usec);
144 /* read the Device Status Register until Sleepmode bit is set */
145 while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG),
146 (reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) {
147 udelay(ISL38XX_WRITEIO_DELAY);
151 #if VERBOSE > SHOW_ERROR_MESSAGES
153 "%08li.%08li Device register read %08x\n",
154 current_time.tv_sec, (long)current_time.tv_usec,
155 readl(device_base + ISL38XX_CTRL_STAT_REG));
157 udelay(ISL38XX_WRITEIO_DELAY);
159 #if VERBOSE > SHOW_ERROR_MESSAGES
160 do_gettimeofday(¤t_time);
162 "%08li.%08li Device asleep counter %i\n",
163 current_time.tv_sec, (long)current_time.tv_usec,
167 /* assert the Wakeup interrupt in the Device Interrupt Register */
168 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP,
169 ISL38XX_DEV_INT_REG);
170 udelay(ISL38XX_WRITEIO_DELAY);
172 /* perform another read on the Device Status Register */
173 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
174 udelay(ISL38XX_WRITEIO_DELAY);
176 #if VERBOSE > SHOW_ERROR_MESSAGES
177 do_gettimeofday(¤t_time);
178 DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
179 current_time.tv_sec, (long)current_time.tv_usec, reg);
182 /* device is (still) awake */
183 #if VERBOSE > SHOW_ERROR_MESSAGES
184 DEBUG(SHOW_TRACING, "Device is in active state\n");
186 /* trigger the device by setting the Update bit in the Device Int reg */
188 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
189 ISL38XX_DEV_INT_REG);
190 udelay(ISL38XX_WRITEIO_DELAY);
195 isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address)
197 #if VERBOSE > SHOW_ERROR_MESSAGES
198 DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n");
201 /* load the address of the control block in the device */
202 isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG);
203 udelay(ISL38XX_WRITEIO_DELAY);
205 /* set the reset bit in the Device Interrupt Register */
206 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG);
207 udelay(ISL38XX_WRITEIO_DELAY);
209 /* enable the interrupt for detecting initialization */
211 /* Note: Do not enable other interrupts here. We want the
212 * device to have come up first 100% before allowing any other
214 isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG);
215 udelay(ISL38XX_WRITEIO_DELAY); /* allow complete full reset */
219 isl38xx_enable_common_interrupts(void __iomem *device_base) {
221 reg = ( ISL38XX_INT_IDENT_UPDATE |
222 ISL38XX_INT_IDENT_SLEEP | ISL38XX_INT_IDENT_WAKEUP);
223 isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG);
224 udelay(ISL38XX_WRITEIO_DELAY);
228 isl38xx_in_queue(isl38xx_control_block *cb, int queue)
230 const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) -
231 le32_to_cpu(cb->device_curr_frag[queue]));
233 /* determine the amount of fragments in the queue depending on the type
234 * of the queue, either transmit or receive */
236 BUG_ON(delta < 0); /* driver ptr must be ahead of device ptr */
240 case ISL38XX_CB_TX_MGMTQ:
241 BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
242 case ISL38XX_CB_TX_DATA_LQ:
243 case ISL38XX_CB_TX_DATA_HQ:
244 BUG_ON(delta > ISL38XX_CB_TX_QSIZE);
249 case ISL38XX_CB_RX_MGMTQ:
250 BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
251 return ISL38XX_CB_MGMT_QSIZE - delta;
254 case ISL38XX_CB_RX_DATA_LQ:
255 case ISL38XX_CB_RX_DATA_HQ:
256 BUG_ON(delta > ISL38XX_CB_RX_QSIZE);
257 return ISL38XX_CB_RX_QSIZE - delta;