2 * Standard PCI Hot Plug Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/interrupt.h>
38 /* Slot Available Register I field definition */
39 #define SLOT_33MHZ 0x0000001f
40 #define SLOT_66MHZ_PCIX 0x00001f00
41 #define SLOT_100MHZ_PCIX 0x001f0000
42 #define SLOT_133MHZ_PCIX 0x1f000000
44 /* Slot Available Register II field definition */
45 #define SLOT_66MHZ 0x0000001f
46 #define SLOT_66MHZ_PCIX_266 0x00000f00
47 #define SLOT_100MHZ_PCIX_266 0x0000f000
48 #define SLOT_133MHZ_PCIX_266 0x000f0000
49 #define SLOT_66MHZ_PCIX_533 0x00f00000
50 #define SLOT_100MHZ_PCIX_533 0x0f000000
51 #define SLOT_133MHZ_PCIX_533 0xf0000000
53 /* Slot Configuration */
54 #define SLOT_NUM 0x0000001F
55 #define FIRST_DEV_NUM 0x00001F00
56 #define PSN 0x07FF0000
57 #define UPDOWN 0x20000000
58 #define MRLSENSOR 0x40000000
59 #define ATTN_BUTTON 0x80000000
62 * Interrupt Locator Register definitions
64 #define CMD_INTR_PENDING (1 << 0)
65 #define SLOT_INTR_PENDING(i) (1 << (i + 1))
68 * Controller SERR-INT Register
70 #define GLOBAL_INTR_MASK (1 << 0)
71 #define GLOBAL_SERR_MASK (1 << 1)
72 #define COMMAND_INTR_MASK (1 << 2)
73 #define ARBITER_SERR_MASK (1 << 3)
74 #define COMMAND_DETECTED (1 << 16)
75 #define ARBITER_DETECTED (1 << 17)
76 #define SERR_INTR_RSVDZ_MASK 0xfffc0000
79 * Logical Slot Register definitions
81 #define SLOT_REG(i) (SLOT1 + (4 * i))
83 #define SLOT_STATE_SHIFT (0)
84 #define SLOT_STATE_MASK (3 << 0)
85 #define SLOT_STATE_PWRONLY (1)
86 #define SLOT_STATE_ENABLED (2)
87 #define SLOT_STATE_DISABLED (3)
88 #define PWR_LED_STATE_SHIFT (2)
89 #define PWR_LED_STATE_MASK (3 << 2)
90 #define ATN_LED_STATE_SHIFT (4)
91 #define ATN_LED_STATE_MASK (3 << 4)
92 #define ATN_LED_STATE_ON (1)
93 #define ATN_LED_STATE_BLINK (2)
94 #define ATN_LED_STATE_OFF (3)
95 #define POWER_FAULT (1 << 6)
96 #define ATN_BUTTON (1 << 7)
97 #define MRL_SENSOR (1 << 8)
98 #define MHZ66_CAP (1 << 9)
99 #define PRSNT_SHIFT (10)
100 #define PRSNT_MASK (3 << 10)
101 #define PCIX_CAP_SHIFT (12)
102 #define PCIX_CAP_MASK_PI1 (3 << 12)
103 #define PCIX_CAP_MASK_PI2 (7 << 12)
104 #define PRSNT_CHANGE_DETECTED (1 << 16)
105 #define ISO_PFAULT_DETECTED (1 << 17)
106 #define BUTTON_PRESS_DETECTED (1 << 18)
107 #define MRL_CHANGE_DETECTED (1 << 19)
108 #define CON_PFAULT_DETECTED (1 << 20)
109 #define PRSNT_CHANGE_INTR_MASK (1 << 24)
110 #define ISO_PFAULT_INTR_MASK (1 << 25)
111 #define BUTTON_PRESS_INTR_MASK (1 << 26)
112 #define MRL_CHANGE_INTR_MASK (1 << 27)
113 #define CON_PFAULT_INTR_MASK (1 << 28)
114 #define MRL_CHANGE_SERR_MASK (1 << 29)
115 #define CON_PFAULT_SERR_MASK (1 << 30)
116 #define SLOT_REG_RSVDZ_MASK (1 << 15) | (7 << 21)
119 * SHPC Command Code definitnions
121 * Slot Operation 00h - 3Fh
122 * Set Bus Segment Speed/Mode A 40h - 47h
123 * Power-Only All Slots 48h
124 * Enable All Slots 49h
125 * Set Bus Segment Speed/Mode B (PI=2) 50h - 5Fh
126 * Reserved Command Codes 60h - BFh
127 * Vendor Specific Commands C0h - FFh
129 #define SET_SLOT_PWR 0x01 /* Slot Operation */
130 #define SET_SLOT_ENABLE 0x02
131 #define SET_SLOT_DISABLE 0x03
132 #define SET_PWR_ON 0x04
133 #define SET_PWR_BLINK 0x08
134 #define SET_PWR_OFF 0x0c
135 #define SET_ATTN_ON 0x10
136 #define SET_ATTN_BLINK 0x20
137 #define SET_ATTN_OFF 0x30
138 #define SETA_PCI_33MHZ 0x40 /* Set Bus Segment Speed/Mode A */
139 #define SETA_PCI_66MHZ 0x41
140 #define SETA_PCIX_66MHZ 0x42
141 #define SETA_PCIX_100MHZ 0x43
142 #define SETA_PCIX_133MHZ 0x44
143 #define SETA_RESERVED1 0x45
144 #define SETA_RESERVED2 0x46
145 #define SETA_RESERVED3 0x47
146 #define SET_PWR_ONLY_ALL 0x48 /* Power-Only All Slots */
147 #define SET_ENABLE_ALL 0x49 /* Enable All Slots */
148 #define SETB_PCI_33MHZ 0x50 /* Set Bus Segment Speed/Mode B */
149 #define SETB_PCI_66MHZ 0x51
150 #define SETB_PCIX_66MHZ_PM 0x52
151 #define SETB_PCIX_100MHZ_PM 0x53
152 #define SETB_PCIX_133MHZ_PM 0x54
153 #define SETB_PCIX_66MHZ_EM 0x55
154 #define SETB_PCIX_100MHZ_EM 0x56
155 #define SETB_PCIX_133MHZ_EM 0x57
156 #define SETB_PCIX_66MHZ_266 0x58
157 #define SETB_PCIX_100MHZ_266 0x59
158 #define SETB_PCIX_133MHZ_266 0x5a
159 #define SETB_PCIX_66MHZ_533 0x5b
160 #define SETB_PCIX_100MHZ_533 0x5c
161 #define SETB_PCIX_133MHZ_533 0x5d
162 #define SETB_RESERVED1 0x5e
163 #define SETB_RESERVED2 0x5f
166 * SHPC controller command error code
168 #define SWITCH_OPEN 0x1
169 #define INVALID_CMD 0x2
170 #define INVALID_SPEED_MODE 0x4
173 * For accessing SHPC Working Register Set via PCI Configuration Space
175 #define DWORD_SELECT 0x2
176 #define DWORD_DATA 0x4
178 /* Field Offset in Logical Slot Register - byte boundary */
179 #define SLOT_EVENT_LATCH 0x2
180 #define SLOT_SERR_INT_MASK 0x3
182 static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
184 static irqreturn_t shpc_isr(int irq, void *dev_id);
185 static void start_int_poll_timer(struct controller *ctrl, int sec);
186 static int hpc_check_cmd_status(struct controller *ctrl);
188 static inline u8 shpc_readb(struct controller *ctrl, int reg)
190 return readb(ctrl->creg + reg);
193 static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
195 writeb(val, ctrl->creg + reg);
198 static inline u16 shpc_readw(struct controller *ctrl, int reg)
200 return readw(ctrl->creg + reg);
203 static inline void shpc_writew(struct controller *ctrl, int reg, u16 val)
205 writew(val, ctrl->creg + reg);
208 static inline u32 shpc_readl(struct controller *ctrl, int reg)
210 return readl(ctrl->creg + reg);
213 static inline void shpc_writel(struct controller *ctrl, int reg, u32 val)
215 writel(val, ctrl->creg + reg);
218 static inline int shpc_indirect_read(struct controller *ctrl, int index,
222 u32 cap_offset = ctrl->cap_offset;
223 struct pci_dev *pdev = ctrl->pci_dev;
225 rc = pci_write_config_byte(pdev, cap_offset + DWORD_SELECT, index);
228 return pci_read_config_dword(pdev, cap_offset + DWORD_DATA, value);
232 * This is the interrupt polling timeout function.
234 static void int_poll_timeout(unsigned long data)
236 struct controller *ctrl = (struct controller *)data;
238 /* Poll for interrupt events. regs == NULL => polling */
241 init_timer(&ctrl->poll_timer);
242 if (!shpchp_poll_time)
243 shpchp_poll_time = 2; /* default polling interval is 2 sec */
245 start_int_poll_timer(ctrl, shpchp_poll_time);
249 * This function starts the interrupt polling timer.
251 static void start_int_poll_timer(struct controller *ctrl, int sec)
253 /* Clamp to sane value */
254 if ((sec <= 0) || (sec > 60))
257 ctrl->poll_timer.function = &int_poll_timeout;
258 ctrl->poll_timer.data = (unsigned long)ctrl;
259 ctrl->poll_timer.expires = jiffies + sec * HZ;
260 add_timer(&ctrl->poll_timer);
263 static inline int is_ctrl_busy(struct controller *ctrl)
265 u16 cmd_status = shpc_readw(ctrl, CMD_STATUS);
266 return cmd_status & 0x1;
270 * Returns 1 if SHPC finishes executing a command within 1 sec,
271 * otherwise returns 0.
273 static inline int shpc_poll_ctrl_busy(struct controller *ctrl)
277 if (!is_ctrl_busy(ctrl))
280 /* Check every 0.1 sec for a total of 1 sec */
281 for (i = 0; i < 10; i++) {
283 if (!is_ctrl_busy(ctrl))
290 static inline int shpc_wait_cmd(struct controller *ctrl)
293 unsigned long timeout = msecs_to_jiffies(1000);
296 if (shpchp_poll_mode)
297 rc = shpc_poll_ctrl_busy(ctrl);
299 rc = wait_event_interruptible_timeout(ctrl->queue,
300 !is_ctrl_busy(ctrl), timeout);
301 if (!rc && is_ctrl_busy(ctrl)) {
303 err("Command not completed in 1000 msec\n");
306 info("Command was interrupted by a signal\n");
312 static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
314 struct controller *ctrl = slot->ctrl;
319 mutex_lock(&slot->ctrl->cmd_lock);
321 if (!shpc_poll_ctrl_busy(ctrl)) {
322 /* After 1 sec and and the controller is still busy */
323 err("%s : Controller is still busy after 1 sec.\n",
330 temp_word = (t_slot << 8) | (cmd & 0xFF);
331 dbg("%s: t_slot %x cmd %x\n", __func__, t_slot, cmd);
333 /* To make sure the Controller Busy bit is 0 before we send out the
336 shpc_writew(ctrl, CMD, temp_word);
339 * Wait for command completion.
341 retval = shpc_wait_cmd(slot->ctrl);
345 cmd_status = hpc_check_cmd_status(slot->ctrl);
347 err("%s: Failed to issued command 0x%x (error code = %d)\n",
348 __func__, cmd, cmd_status);
352 mutex_unlock(&slot->ctrl->cmd_lock);
356 static int hpc_check_cmd_status(struct controller *ctrl)
359 u16 cmd_status = shpc_readw(ctrl, CMD_STATUS) & 0x000F;
361 switch (cmd_status >> 1) {
366 retval = SWITCH_OPEN;
367 err("%s: Switch opened!\n", __func__);
370 retval = INVALID_CMD;
371 err("%s: Invalid HPC command!\n", __func__);
374 retval = INVALID_SPEED_MODE;
375 err("%s: Invalid bus speed/mode!\n", __func__);
385 static int hpc_get_attention_status(struct slot *slot, u8 *status)
387 struct controller *ctrl = slot->ctrl;
388 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
389 u8 state = (slot_reg & ATN_LED_STATE_MASK) >> ATN_LED_STATE_SHIFT;
392 case ATN_LED_STATE_ON:
393 *status = 1; /* On */
395 case ATN_LED_STATE_BLINK:
396 *status = 2; /* Blink */
398 case ATN_LED_STATE_OFF:
399 *status = 0; /* Off */
402 *status = 0xFF; /* Reserved */
409 static int hpc_get_power_status(struct slot * slot, u8 *status)
411 struct controller *ctrl = slot->ctrl;
412 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
413 u8 state = (slot_reg & SLOT_STATE_MASK) >> SLOT_STATE_SHIFT;
416 case SLOT_STATE_PWRONLY:
417 *status = 2; /* Powered only */
419 case SLOT_STATE_ENABLED:
420 *status = 1; /* Enabled */
422 case SLOT_STATE_DISABLED:
423 *status = 0; /* Disabled */
426 *status = 0xFF; /* Reserved */
434 static int hpc_get_latch_status(struct slot *slot, u8 *status)
436 struct controller *ctrl = slot->ctrl;
437 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
439 *status = !!(slot_reg & MRL_SENSOR); /* 0 -> close; 1 -> open */
444 static int hpc_get_adapter_status(struct slot *slot, u8 *status)
446 struct controller *ctrl = slot->ctrl;
447 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
448 u8 state = (slot_reg & PRSNT_MASK) >> PRSNT_SHIFT;
450 *status = (state != 0x3) ? 1 : 0;
455 static int hpc_get_prog_int(struct slot *slot, u8 *prog_int)
457 struct controller *ctrl = slot->ctrl;
459 *prog_int = shpc_readb(ctrl, PROG_INTERFACE);
464 static int hpc_get_adapter_speed(struct slot *slot, enum pci_bus_speed *value)
467 struct controller *ctrl = slot->ctrl;
468 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
469 u8 m66_cap = !!(slot_reg & MHZ66_CAP);
472 if ((retval = hpc_get_prog_int(slot, &pi)))
477 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI1) >> PCIX_CAP_SHIFT;
480 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI2) >> PCIX_CAP_SHIFT;
486 dbg("%s: slot_reg = %x, pcix_cap = %x, m66_cap = %x\n",
487 __func__, slot_reg, pcix_cap, m66_cap);
491 *value = m66_cap ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
494 *value = PCI_SPEED_66MHz_PCIX;
497 *value = PCI_SPEED_133MHz_PCIX;
500 *value = PCI_SPEED_133MHz_PCIX_266;
503 *value = PCI_SPEED_133MHz_PCIX_533;
507 *value = PCI_SPEED_UNKNOWN;
512 dbg("Adapter speed = %d\n", *value);
516 static int hpc_get_mode1_ECC_cap(struct slot *slot, u8 *mode)
519 struct controller *ctrl = slot->ctrl;
520 u16 sec_bus_status = shpc_readw(ctrl, SEC_BUS_CONFIG);
521 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
524 *mode = (sec_bus_status & 0x0100) >> 8;
529 dbg("Mode 1 ECC cap = %d\n", *mode);
533 static int hpc_query_power_fault(struct slot * slot)
535 struct controller *ctrl = slot->ctrl;
536 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
538 /* Note: Logic 0 => fault */
539 return !(slot_reg & POWER_FAULT);
542 static int hpc_set_attention_status(struct slot *slot, u8 value)
548 slot_cmd = SET_ATTN_OFF; /* OFF */
551 slot_cmd = SET_ATTN_ON; /* ON */
554 slot_cmd = SET_ATTN_BLINK; /* BLINK */
560 return shpc_write_cmd(slot, slot->hp_slot, slot_cmd);
564 static void hpc_set_green_led_on(struct slot *slot)
566 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_ON);
569 static void hpc_set_green_led_off(struct slot *slot)
571 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_OFF);
574 static void hpc_set_green_led_blink(struct slot *slot)
576 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_BLINK);
579 static void hpc_release_ctlr(struct controller *ctrl)
582 u32 slot_reg, serr_int;
585 * Mask event interrupts and SERRs of all slots
587 for (i = 0; i < ctrl->num_slots; i++) {
588 slot_reg = shpc_readl(ctrl, SLOT_REG(i));
589 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
590 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
591 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
592 CON_PFAULT_SERR_MASK);
593 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
594 shpc_writel(ctrl, SLOT_REG(i), slot_reg);
600 * Mask SERR and System Interrupt generation
602 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
603 serr_int |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
604 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
605 serr_int &= ~SERR_INTR_RSVDZ_MASK;
606 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
608 if (shpchp_poll_mode)
609 del_timer(&ctrl->poll_timer);
611 free_irq(ctrl->pci_dev->irq, ctrl);
612 pci_disable_msi(ctrl->pci_dev);
616 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
619 * If this is the last controller to be released, destroy the
622 if (atomic_dec_and_test(&shpchp_num_controllers))
623 destroy_workqueue(shpchp_wq);
626 static int hpc_power_on_slot(struct slot * slot)
630 retval = shpc_write_cmd(slot, slot->hp_slot, SET_SLOT_PWR);
632 err("%s: Write command failed!\n", __func__);
637 static int hpc_slot_enable(struct slot * slot)
641 /* Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
642 retval = shpc_write_cmd(slot, slot->hp_slot,
643 SET_SLOT_ENABLE | SET_PWR_BLINK | SET_ATTN_OFF);
645 err("%s: Write command failed!\n", __func__);
650 static int hpc_slot_disable(struct slot * slot)
654 /* Slot - Disable, Power Indicator - Off, Attention Indicator - On */
655 retval = shpc_write_cmd(slot, slot->hp_slot,
656 SET_SLOT_DISABLE | SET_PWR_OFF | SET_ATTN_ON);
658 err("%s: Write command failed!\n", __func__);
663 static int hpc_set_bus_speed_mode(struct slot * slot, enum pci_bus_speed value)
666 struct controller *ctrl = slot->ctrl;
669 pi = shpc_readb(ctrl, PROG_INTERFACE);
670 if ((pi == 1) && (value > PCI_SPEED_133MHz_PCIX))
674 case PCI_SPEED_33MHz:
675 cmd = SETA_PCI_33MHZ;
677 case PCI_SPEED_66MHz:
678 cmd = SETA_PCI_66MHZ;
680 case PCI_SPEED_66MHz_PCIX:
681 cmd = SETA_PCIX_66MHZ;
683 case PCI_SPEED_100MHz_PCIX:
684 cmd = SETA_PCIX_100MHZ;
686 case PCI_SPEED_133MHz_PCIX:
687 cmd = SETA_PCIX_133MHZ;
689 case PCI_SPEED_66MHz_PCIX_ECC:
690 cmd = SETB_PCIX_66MHZ_EM;
692 case PCI_SPEED_100MHz_PCIX_ECC:
693 cmd = SETB_PCIX_100MHZ_EM;
695 case PCI_SPEED_133MHz_PCIX_ECC:
696 cmd = SETB_PCIX_133MHZ_EM;
698 case PCI_SPEED_66MHz_PCIX_266:
699 cmd = SETB_PCIX_66MHZ_266;
701 case PCI_SPEED_100MHz_PCIX_266:
702 cmd = SETB_PCIX_100MHZ_266;
704 case PCI_SPEED_133MHz_PCIX_266:
705 cmd = SETB_PCIX_133MHZ_266;
707 case PCI_SPEED_66MHz_PCIX_533:
708 cmd = SETB_PCIX_66MHZ_533;
710 case PCI_SPEED_100MHz_PCIX_533:
711 cmd = SETB_PCIX_100MHZ_533;
713 case PCI_SPEED_133MHz_PCIX_533:
714 cmd = SETB_PCIX_133MHZ_533;
720 retval = shpc_write_cmd(slot, 0, cmd);
722 err("%s: Write command failed!\n", __func__);
727 static irqreturn_t shpc_isr(int irq, void *dev_id)
729 struct controller *ctrl = (struct controller *)dev_id;
730 u32 serr_int, slot_reg, intr_loc, intr_loc2;
733 /* Check to see if it was our interrupt */
734 intr_loc = shpc_readl(ctrl, INTR_LOC);
738 dbg("%s: intr_loc = %x\n",__func__, intr_loc);
740 if(!shpchp_poll_mode) {
742 * Mask Global Interrupt Mask - see implementation
743 * note on p. 139 of SHPC spec rev 1.0
745 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
746 serr_int |= GLOBAL_INTR_MASK;
747 serr_int &= ~SERR_INTR_RSVDZ_MASK;
748 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
750 intr_loc2 = shpc_readl(ctrl, INTR_LOC);
751 dbg("%s: intr_loc2 = %x\n",__func__, intr_loc2);
754 if (intr_loc & CMD_INTR_PENDING) {
756 * Command Complete Interrupt Pending
757 * RO only - clear by writing 1 to the Command Completion
758 * Detect bit in Controller SERR-INT register
760 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
761 serr_int &= ~SERR_INTR_RSVDZ_MASK;
762 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
764 wake_up_interruptible(&ctrl->queue);
767 if (!(intr_loc & ~CMD_INTR_PENDING))
770 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
771 /* To find out which slot has interrupt pending */
772 if (!(intr_loc & SLOT_INTR_PENDING(hp_slot)))
775 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
776 dbg("%s: Slot %x with intr, slot register = %x\n",
777 __func__, hp_slot, slot_reg);
779 if (slot_reg & MRL_CHANGE_DETECTED)
780 shpchp_handle_switch_change(hp_slot, ctrl);
782 if (slot_reg & BUTTON_PRESS_DETECTED)
783 shpchp_handle_attention_button(hp_slot, ctrl);
785 if (slot_reg & PRSNT_CHANGE_DETECTED)
786 shpchp_handle_presence_change(hp_slot, ctrl);
788 if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))
789 shpchp_handle_power_fault(hp_slot, ctrl);
791 /* Clear all slot events */
792 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
793 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
796 if (!shpchp_poll_mode) {
797 /* Unmask Global Interrupt Mask */
798 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
799 serr_int &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK);
800 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
806 static int hpc_get_max_bus_speed (struct slot *slot, enum pci_bus_speed *value)
809 struct controller *ctrl = slot->ctrl;
810 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
811 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
812 u32 slot_avail1 = shpc_readl(ctrl, SLOT_AVAIL1);
813 u32 slot_avail2 = shpc_readl(ctrl, SLOT_AVAIL2);
816 if (slot_avail2 & SLOT_133MHZ_PCIX_533)
817 bus_speed = PCI_SPEED_133MHz_PCIX_533;
818 else if (slot_avail2 & SLOT_100MHZ_PCIX_533)
819 bus_speed = PCI_SPEED_100MHz_PCIX_533;
820 else if (slot_avail2 & SLOT_66MHZ_PCIX_533)
821 bus_speed = PCI_SPEED_66MHz_PCIX_533;
822 else if (slot_avail2 & SLOT_133MHZ_PCIX_266)
823 bus_speed = PCI_SPEED_133MHz_PCIX_266;
824 else if (slot_avail2 & SLOT_100MHZ_PCIX_266)
825 bus_speed = PCI_SPEED_100MHz_PCIX_266;
826 else if (slot_avail2 & SLOT_66MHZ_PCIX_266)
827 bus_speed = PCI_SPEED_66MHz_PCIX_266;
830 if (bus_speed == PCI_SPEED_UNKNOWN) {
831 if (slot_avail1 & SLOT_133MHZ_PCIX)
832 bus_speed = PCI_SPEED_133MHz_PCIX;
833 else if (slot_avail1 & SLOT_100MHZ_PCIX)
834 bus_speed = PCI_SPEED_100MHz_PCIX;
835 else if (slot_avail1 & SLOT_66MHZ_PCIX)
836 bus_speed = PCI_SPEED_66MHz_PCIX;
837 else if (slot_avail2 & SLOT_66MHZ)
838 bus_speed = PCI_SPEED_66MHz;
839 else if (slot_avail1 & SLOT_33MHZ)
840 bus_speed = PCI_SPEED_33MHz;
846 dbg("Max bus speed = %d\n", bus_speed);
851 static int hpc_get_cur_bus_speed (struct slot *slot, enum pci_bus_speed *value)
854 struct controller *ctrl = slot->ctrl;
855 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
856 u16 sec_bus_reg = shpc_readw(ctrl, SEC_BUS_CONFIG);
857 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
858 u8 speed_mode = (pi == 2) ? (sec_bus_reg & 0xF) : (sec_bus_reg & 0x7);
860 if ((pi == 1) && (speed_mode > 4)) {
861 *value = PCI_SPEED_UNKNOWN;
865 switch (speed_mode) {
867 *value = PCI_SPEED_33MHz;
870 *value = PCI_SPEED_66MHz;
873 *value = PCI_SPEED_66MHz_PCIX;
876 *value = PCI_SPEED_100MHz_PCIX;
879 *value = PCI_SPEED_133MHz_PCIX;
882 *value = PCI_SPEED_66MHz_PCIX_ECC;
885 *value = PCI_SPEED_100MHz_PCIX_ECC;
888 *value = PCI_SPEED_133MHz_PCIX_ECC;
891 *value = PCI_SPEED_66MHz_PCIX_266;
894 *value = PCI_SPEED_100MHz_PCIX_266;
897 *value = PCI_SPEED_133MHz_PCIX_266;
900 *value = PCI_SPEED_66MHz_PCIX_533;
903 *value = PCI_SPEED_100MHz_PCIX_533;
906 *value = PCI_SPEED_133MHz_PCIX_533;
909 *value = PCI_SPEED_UNKNOWN;
914 dbg("Current bus speed = %d\n", bus_speed);
918 static struct hpc_ops shpchp_hpc_ops = {
919 .power_on_slot = hpc_power_on_slot,
920 .slot_enable = hpc_slot_enable,
921 .slot_disable = hpc_slot_disable,
922 .set_bus_speed_mode = hpc_set_bus_speed_mode,
923 .set_attention_status = hpc_set_attention_status,
924 .get_power_status = hpc_get_power_status,
925 .get_attention_status = hpc_get_attention_status,
926 .get_latch_status = hpc_get_latch_status,
927 .get_adapter_status = hpc_get_adapter_status,
929 .get_max_bus_speed = hpc_get_max_bus_speed,
930 .get_cur_bus_speed = hpc_get_cur_bus_speed,
931 .get_adapter_speed = hpc_get_adapter_speed,
932 .get_mode1_ECC_cap = hpc_get_mode1_ECC_cap,
933 .get_prog_int = hpc_get_prog_int,
935 .query_power_fault = hpc_query_power_fault,
936 .green_led_on = hpc_set_green_led_on,
937 .green_led_off = hpc_set_green_led_off,
938 .green_led_blink = hpc_set_green_led_blink,
940 .release_ctlr = hpc_release_ctlr,
943 int shpc_init(struct controller *ctrl, struct pci_dev *pdev)
945 int rc = -1, num_slots = 0;
947 u32 shpc_base_offset;
948 u32 tempdword, slot_reg, slot_config;
951 ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */
953 if ((pdev->vendor == PCI_VENDOR_ID_AMD) || (pdev->device ==
954 PCI_DEVICE_ID_AMD_GOLAM_7450)) {
955 /* amd shpc driver doesn't use Base Offset; assume 0 */
956 ctrl->mmio_base = pci_resource_start(pdev, 0);
957 ctrl->mmio_size = pci_resource_len(pdev, 0);
959 ctrl->cap_offset = pci_find_capability(pdev, PCI_CAP_ID_SHPC);
960 if (!ctrl->cap_offset) {
961 err("%s : cap_offset == 0\n", __func__);
964 dbg("%s: cap_offset = %x\n", __func__, ctrl->cap_offset);
966 rc = shpc_indirect_read(ctrl, 0, &shpc_base_offset);
968 err("%s: cannot read base_offset\n", __func__);
972 rc = shpc_indirect_read(ctrl, 3, &tempdword);
974 err("%s: cannot read slot config\n", __func__);
977 num_slots = tempdword & SLOT_NUM;
978 dbg("%s: num_slots (indirect) %x\n", __func__, num_slots);
980 for (i = 0; i < 9 + num_slots; i++) {
981 rc = shpc_indirect_read(ctrl, i, &tempdword);
983 err("%s: cannot read creg (index = %d)\n",
987 dbg("%s: offset %d: value %x\n", __func__,i,
992 pci_resource_start(pdev, 0) + shpc_base_offset;
993 ctrl->mmio_size = 0x24 + 0x4 * num_slots;
996 info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor,
997 pdev->subsystem_device);
999 rc = pci_enable_device(pdev);
1001 err("%s: pci_enable_device failed\n", __func__);
1005 if (!request_mem_region(ctrl->mmio_base, ctrl->mmio_size, MY_NAME)) {
1006 err("%s: cannot reserve MMIO region\n", __func__);
1011 ctrl->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
1013 err("%s: cannot remap MMIO region %lx @ %lx\n", __func__,
1014 ctrl->mmio_size, ctrl->mmio_base);
1015 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
1019 dbg("%s: ctrl->creg %p\n", __func__, ctrl->creg);
1021 mutex_init(&ctrl->crit_sect);
1022 mutex_init(&ctrl->cmd_lock);
1024 /* Setup wait queue */
1025 init_waitqueue_head(&ctrl->queue);
1027 ctrl->hpc_ops = &shpchp_hpc_ops;
1029 /* Return PCI Controller Info */
1030 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
1031 ctrl->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
1032 ctrl->num_slots = slot_config & SLOT_NUM;
1033 ctrl->first_slot = (slot_config & PSN) >> 16;
1034 ctrl->slot_num_inc = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
1036 /* Mask Global Interrupt Mask & Command Complete Interrupt Mask */
1037 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1038 dbg("%s: SERR_INTR_ENABLE = %x\n", __func__, tempdword);
1039 tempdword |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
1040 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
1041 tempdword &= ~SERR_INTR_RSVDZ_MASK;
1042 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1043 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1044 dbg("%s: SERR_INTR_ENABLE = %x\n", __func__, tempdword);
1046 /* Mask the MRL sensor SERR Mask of individual slot in
1047 * Slot SERR-INT Mask & clear all the existing event if any
1049 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
1050 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1051 dbg("%s: Default Logical Slot Register %d value %x\n", __func__,
1053 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1054 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1055 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
1056 CON_PFAULT_SERR_MASK);
1057 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
1058 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1061 if (shpchp_poll_mode) {
1062 /* Install interrupt polling timer. Start with 10 sec delay */
1063 init_timer(&ctrl->poll_timer);
1064 start_int_poll_timer(ctrl, 10);
1066 /* Installs the interrupt handler */
1067 rc = pci_enable_msi(pdev);
1069 info("Can't get msi for the hotplug controller\n");
1070 info("Use INTx for the hotplug controller\n");
1073 rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED,
1074 MY_NAME, (void *)ctrl);
1075 dbg("%s: request_irq %d for hpc%d (returns %d)\n",
1076 __func__, ctrl->pci_dev->irq,
1077 atomic_read(&shpchp_num_controllers), rc);
1079 err("Can't get irq %d for the hotplug controller\n",
1080 ctrl->pci_dev->irq);
1084 dbg("%s: HPC at b:d:f:irq=0x%x:%x:%x:%x\n", __func__,
1085 pdev->bus->number, PCI_SLOT(pdev->devfn),
1086 PCI_FUNC(pdev->devfn), pdev->irq);
1089 * If this is the first controller to be initialized,
1090 * initialize the shpchpd work queue
1092 if (atomic_add_return(1, &shpchp_num_controllers) == 1) {
1093 shpchp_wq = create_singlethread_workqueue("shpchpd");
1101 * Unmask all event interrupts of all slots
1103 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
1104 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1105 dbg("%s: Default Logical Slot Register %d value %x\n", __func__,
1107 slot_reg &= ~(PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1108 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1109 CON_PFAULT_INTR_MASK | SLOT_REG_RSVDZ_MASK);
1110 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1112 if (!shpchp_poll_mode) {
1113 /* Unmask all general input interrupts and SERR */
1114 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1115 tempdword &= ~(GLOBAL_INTR_MASK | COMMAND_INTR_MASK |
1116 SERR_INTR_RSVDZ_MASK);
1117 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1118 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1119 dbg("%s: SERR_INTR_ENABLE = %x\n", __func__, tempdword);
1124 /* We end up here for the many possible ways to fail this API. */
1126 iounmap(ctrl->creg);