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/module.h>
22 #include <linux/types.h>
23 #include <linux/delay.h>
25 #include <asm/uaccess.h>
28 #include "prismcompat.h"
30 #include "islpci_dev.h"
31 #include "islpci_mgt.h"
33 /******************************************************************************
34 Device Interface & Control functions
35 ******************************************************************************/
38 * isl38xx_disable_interrupts - disable all interrupts
39 * @device: pci memory base address
41 * Instructs the device to disable all interrupt reporting by asserting
42 * the IRQ line. New events may still show up in the interrupt identification
43 * register located at offset %ISL38XX_INT_IDENT_REG.
46 isl38xx_disable_interrupts(void __iomem *device)
48 isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG);
49 udelay(ISL38XX_WRITEIO_DELAY);
53 isl38xx_handle_sleep_request(isl38xx_control_block *control_block,
54 int *powerstate, void __iomem *device_base)
56 /* device requests to go into sleep mode
57 * check whether the transmit queues for data and management are empty */
58 if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ))
59 /* data tx queue not empty */
62 if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
63 /* management tx queue not empty */
66 /* check also whether received frames are pending */
67 if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ))
68 /* data rx queue not empty */
71 if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ))
72 /* management rx queue not empty */
75 #if VERBOSE > SHOW_ERROR_MESSAGES
76 DEBUG(SHOW_TRACING, "Device going to sleep mode\n");
79 /* all queues are empty, allow the device to go into sleep mode */
80 *powerstate = ISL38XX_PSM_POWERSAVE_STATE;
82 /* assert the Sleep interrupt in the Device Interrupt Register */
83 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP,
85 udelay(ISL38XX_WRITEIO_DELAY);
89 isl38xx_handle_wakeup(isl38xx_control_block *control_block,
90 int *powerstate, void __iomem *device_base)
92 /* device is in active state, update the powerstate flag */
93 *powerstate = ISL38XX_PSM_ACTIVE_STATE;
95 /* now check whether there are frames pending for the card */
96 if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)
97 && !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
100 #if VERBOSE > SHOW_ERROR_MESSAGES
101 DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n");
104 /* either data or management transmit queue has a frame pending
105 * trigger the device by setting the Update bit in the Device Int reg */
106 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
107 ISL38XX_DEV_INT_REG);
108 udelay(ISL38XX_WRITEIO_DELAY);
112 isl38xx_trigger_device(int asleep, void __iomem *device_base)
114 u32 reg, counter = 0;
116 #if VERBOSE > SHOW_ERROR_MESSAGES
117 struct timeval current_time;
118 DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n");
121 /* check whether the device is in power save mode */
123 /* device is in powersave, trigger the device for wakeup */
124 #if VERBOSE > SHOW_ERROR_MESSAGES
125 do_gettimeofday(¤t_time);
126 DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n",
127 current_time.tv_sec, (long)current_time.tv_usec);
129 DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
130 current_time.tv_sec, (long)current_time.tv_usec,
131 readl(device_base + ISL38XX_CTRL_STAT_REG));
133 udelay(ISL38XX_WRITEIO_DELAY);
135 reg = readl(device_base + ISL38XX_INT_IDENT_REG);
136 if (reg == 0xabadface) {
137 #if VERBOSE > SHOW_ERROR_MESSAGES
138 do_gettimeofday(¤t_time);
140 "%08li.%08li Device register abadface\n",
141 current_time.tv_sec, (long)current_time.tv_usec);
143 /* read the Device Status Register until Sleepmode bit is set */
144 while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG),
145 (reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) {
146 udelay(ISL38XX_WRITEIO_DELAY);
150 #if VERBOSE > SHOW_ERROR_MESSAGES
152 "%08li.%08li Device register read %08x\n",
153 current_time.tv_sec, (long)current_time.tv_usec,
154 readl(device_base + ISL38XX_CTRL_STAT_REG));
156 udelay(ISL38XX_WRITEIO_DELAY);
158 #if VERBOSE > SHOW_ERROR_MESSAGES
159 do_gettimeofday(¤t_time);
161 "%08li.%08li Device asleep counter %i\n",
162 current_time.tv_sec, (long)current_time.tv_usec,
166 /* assert the Wakeup interrupt in the Device Interrupt Register */
167 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP,
168 ISL38XX_DEV_INT_REG);
169 udelay(ISL38XX_WRITEIO_DELAY);
171 /* perform another read on the Device Status Register */
172 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
173 udelay(ISL38XX_WRITEIO_DELAY);
175 #if VERBOSE > SHOW_ERROR_MESSAGES
176 do_gettimeofday(¤t_time);
177 DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
178 current_time.tv_sec, (long)current_time.tv_usec, reg);
181 /* device is (still) awake */
182 #if VERBOSE > SHOW_ERROR_MESSAGES
183 DEBUG(SHOW_TRACING, "Device is in active state\n");
185 /* trigger the device by setting the Update bit in the Device Int reg */
187 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
188 ISL38XX_DEV_INT_REG);
189 udelay(ISL38XX_WRITEIO_DELAY);
194 isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address)
196 #if VERBOSE > SHOW_ERROR_MESSAGES
197 DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n");
200 /* load the address of the control block in the device */
201 isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG);
202 udelay(ISL38XX_WRITEIO_DELAY);
204 /* set the reset bit in the Device Interrupt Register */
205 isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG);
206 udelay(ISL38XX_WRITEIO_DELAY);
208 /* enable the interrupt for detecting initialization */
210 /* Note: Do not enable other interrupts here. We want the
211 * device to have come up first 100% before allowing any other
213 isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG);
214 udelay(ISL38XX_WRITEIO_DELAY); /* allow complete full reset */
218 isl38xx_enable_common_interrupts(void __iomem *device_base) {
220 reg = ( ISL38XX_INT_IDENT_UPDATE |
221 ISL38XX_INT_IDENT_SLEEP | ISL38XX_INT_IDENT_WAKEUP);
222 isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG);
223 udelay(ISL38XX_WRITEIO_DELAY);
227 isl38xx_in_queue(isl38xx_control_block *cb, int queue)
229 const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) -
230 le32_to_cpu(cb->device_curr_frag[queue]));
232 /* determine the amount of fragments in the queue depending on the type
233 * of the queue, either transmit or receive */
235 BUG_ON(delta < 0); /* driver ptr must be ahead of device ptr */
239 case ISL38XX_CB_TX_MGMTQ:
240 BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
241 case ISL38XX_CB_TX_DATA_LQ:
242 case ISL38XX_CB_TX_DATA_HQ:
243 BUG_ON(delta > ISL38XX_CB_TX_QSIZE);
248 case ISL38XX_CB_RX_MGMTQ:
249 BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
250 return ISL38XX_CB_MGMT_QSIZE - delta;
253 case ISL38XX_CB_RX_DATA_LQ:
254 case ISL38XX_CB_RX_DATA_HQ:
255 BUG_ON(delta > ISL38XX_CB_RX_QSIZE);
256 return ISL38XX_CB_RX_QSIZE - delta;