2 * Standard PCI Hot Plug Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
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.
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 definitions
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 irqreturn_t shpc_isr(int irq, void *dev_id);
183 static void start_int_poll_timer(struct controller *ctrl, int sec);
184 static int hpc_check_cmd_status(struct controller *ctrl);
186 static inline u8 shpc_readb(struct controller *ctrl, int reg)
188 return readb(ctrl->creg + reg);
191 static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
193 writeb(val, ctrl->creg + reg);
196 static inline u16 shpc_readw(struct controller *ctrl, int reg)
198 return readw(ctrl->creg + reg);
201 static inline void shpc_writew(struct controller *ctrl, int reg, u16 val)
203 writew(val, ctrl->creg + reg);
206 static inline u32 shpc_readl(struct controller *ctrl, int reg)
208 return readl(ctrl->creg + reg);
211 static inline void shpc_writel(struct controller *ctrl, int reg, u32 val)
213 writel(val, ctrl->creg + reg);
216 static inline int shpc_indirect_read(struct controller *ctrl, int index,
220 u32 cap_offset = ctrl->cap_offset;
221 struct pci_dev *pdev = ctrl->pci_dev;
223 rc = pci_write_config_byte(pdev, cap_offset + DWORD_SELECT, index);
226 return pci_read_config_dword(pdev, cap_offset + DWORD_DATA, value);
230 * This is the interrupt polling timeout function.
232 static void int_poll_timeout(struct timer_list *t)
234 struct controller *ctrl = from_timer(ctrl, t, poll_timer);
236 /* Poll for interrupt events. regs == NULL => polling */
239 if (!shpchp_poll_time)
240 shpchp_poll_time = 2; /* default polling interval is 2 sec */
242 start_int_poll_timer(ctrl, shpchp_poll_time);
246 * This function starts the interrupt polling timer.
248 static void start_int_poll_timer(struct controller *ctrl, int sec)
250 /* Clamp to sane value */
251 if ((sec <= 0) || (sec > 60))
254 ctrl->poll_timer.expires = jiffies + sec * HZ;
255 add_timer(&ctrl->poll_timer);
258 static inline int is_ctrl_busy(struct controller *ctrl)
260 u16 cmd_status = shpc_readw(ctrl, CMD_STATUS);
261 return cmd_status & 0x1;
265 * Returns 1 if SHPC finishes executing a command within 1 sec,
266 * otherwise returns 0.
268 static inline int shpc_poll_ctrl_busy(struct controller *ctrl)
272 if (!is_ctrl_busy(ctrl))
275 /* Check every 0.1 sec for a total of 1 sec */
276 for (i = 0; i < 10; i++) {
278 if (!is_ctrl_busy(ctrl))
285 static inline int shpc_wait_cmd(struct controller *ctrl)
288 unsigned long timeout = msecs_to_jiffies(1000);
291 if (shpchp_poll_mode)
292 rc = shpc_poll_ctrl_busy(ctrl);
294 rc = wait_event_interruptible_timeout(ctrl->queue,
295 !is_ctrl_busy(ctrl), timeout);
296 if (!rc && is_ctrl_busy(ctrl)) {
298 ctrl_err(ctrl, "Command not completed in 1000 msec\n");
301 ctrl_info(ctrl, "Command was interrupted by a signal\n");
307 static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
309 struct controller *ctrl = slot->ctrl;
314 mutex_lock(&slot->ctrl->cmd_lock);
316 if (!shpc_poll_ctrl_busy(ctrl)) {
317 /* After 1 sec and and the controller is still busy */
318 ctrl_err(ctrl, "Controller is still busy after 1 sec\n");
324 temp_word = (t_slot << 8) | (cmd & 0xFF);
325 ctrl_dbg(ctrl, "%s: t_slot %x cmd %x\n", __func__, t_slot, cmd);
327 /* To make sure the Controller Busy bit is 0 before we send out the
330 shpc_writew(ctrl, CMD, temp_word);
333 * Wait for command completion.
335 retval = shpc_wait_cmd(slot->ctrl);
339 cmd_status = hpc_check_cmd_status(slot->ctrl);
341 ctrl_err(ctrl, "Failed to issued command 0x%x (error code = %d)\n",
346 mutex_unlock(&slot->ctrl->cmd_lock);
350 static int hpc_check_cmd_status(struct controller *ctrl)
353 u16 cmd_status = shpc_readw(ctrl, CMD_STATUS) & 0x000F;
355 switch (cmd_status >> 1) {
360 retval = SWITCH_OPEN;
361 ctrl_err(ctrl, "Switch opened!\n");
364 retval = INVALID_CMD;
365 ctrl_err(ctrl, "Invalid HPC command!\n");
368 retval = INVALID_SPEED_MODE;
369 ctrl_err(ctrl, "Invalid bus speed/mode!\n");
379 static int hpc_get_attention_status(struct slot *slot, u8 *status)
381 struct controller *ctrl = slot->ctrl;
382 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
383 u8 state = (slot_reg & ATN_LED_STATE_MASK) >> ATN_LED_STATE_SHIFT;
386 case ATN_LED_STATE_ON:
387 *status = 1; /* On */
389 case ATN_LED_STATE_BLINK:
390 *status = 2; /* Blink */
392 case ATN_LED_STATE_OFF:
393 *status = 0; /* Off */
396 *status = 0xFF; /* Reserved */
403 static int hpc_get_power_status(struct slot *slot, u8 *status)
405 struct controller *ctrl = slot->ctrl;
406 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
407 u8 state = (slot_reg & SLOT_STATE_MASK) >> SLOT_STATE_SHIFT;
410 case SLOT_STATE_PWRONLY:
411 *status = 2; /* Powered only */
413 case SLOT_STATE_ENABLED:
414 *status = 1; /* Enabled */
416 case SLOT_STATE_DISABLED:
417 *status = 0; /* Disabled */
420 *status = 0xFF; /* Reserved */
428 static int hpc_get_latch_status(struct slot *slot, u8 *status)
430 struct controller *ctrl = slot->ctrl;
431 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
433 *status = !!(slot_reg & MRL_SENSOR); /* 0 -> close; 1 -> open */
438 static int hpc_get_adapter_status(struct slot *slot, u8 *status)
440 struct controller *ctrl = slot->ctrl;
441 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
442 u8 state = (slot_reg & PRSNT_MASK) >> PRSNT_SHIFT;
444 *status = (state != 0x3) ? 1 : 0;
449 static int hpc_get_prog_int(struct slot *slot, u8 *prog_int)
451 struct controller *ctrl = slot->ctrl;
453 *prog_int = shpc_readb(ctrl, PROG_INTERFACE);
458 static int hpc_get_adapter_speed(struct slot *slot, enum pci_bus_speed *value)
461 struct controller *ctrl = slot->ctrl;
462 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
463 u8 m66_cap = !!(slot_reg & MHZ66_CAP);
466 retval = hpc_get_prog_int(slot, &pi);
472 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI1) >> PCIX_CAP_SHIFT;
475 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI2) >> PCIX_CAP_SHIFT;
481 ctrl_dbg(ctrl, "%s: slot_reg = %x, pcix_cap = %x, m66_cap = %x\n",
482 __func__, slot_reg, pcix_cap, m66_cap);
486 *value = m66_cap ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
489 *value = PCI_SPEED_66MHz_PCIX;
492 *value = PCI_SPEED_133MHz_PCIX;
495 *value = PCI_SPEED_133MHz_PCIX_266;
498 *value = PCI_SPEED_133MHz_PCIX_533;
502 *value = PCI_SPEED_UNKNOWN;
507 ctrl_dbg(ctrl, "Adapter speed = %d\n", *value);
511 static int hpc_get_mode1_ECC_cap(struct slot *slot, u8 *mode)
514 struct controller *ctrl = slot->ctrl;
515 u16 sec_bus_status = shpc_readw(ctrl, SEC_BUS_CONFIG);
516 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
519 *mode = (sec_bus_status & 0x0100) >> 8;
524 ctrl_dbg(ctrl, "Mode 1 ECC cap = %d\n", *mode);
528 static int hpc_query_power_fault(struct slot *slot)
530 struct controller *ctrl = slot->ctrl;
531 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
533 /* Note: Logic 0 => fault */
534 return !(slot_reg & POWER_FAULT);
537 static int hpc_set_attention_status(struct slot *slot, u8 value)
543 slot_cmd = SET_ATTN_OFF; /* OFF */
546 slot_cmd = SET_ATTN_ON; /* ON */
549 slot_cmd = SET_ATTN_BLINK; /* BLINK */
555 return shpc_write_cmd(slot, slot->hp_slot, slot_cmd);
559 static void hpc_set_green_led_on(struct slot *slot)
561 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_ON);
564 static void hpc_set_green_led_off(struct slot *slot)
566 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_OFF);
569 static void hpc_set_green_led_blink(struct slot *slot)
571 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_BLINK);
574 static void hpc_release_ctlr(struct controller *ctrl)
577 u32 slot_reg, serr_int;
580 * Mask event interrupts and SERRs of all slots
582 for (i = 0; i < ctrl->num_slots; i++) {
583 slot_reg = shpc_readl(ctrl, SLOT_REG(i));
584 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
585 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
586 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
587 CON_PFAULT_SERR_MASK);
588 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
589 shpc_writel(ctrl, SLOT_REG(i), slot_reg);
595 * Mask SERR and System Interrupt generation
597 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
598 serr_int |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
599 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
600 serr_int &= ~SERR_INTR_RSVDZ_MASK;
601 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
603 if (shpchp_poll_mode)
604 del_timer(&ctrl->poll_timer);
606 free_irq(ctrl->pci_dev->irq, ctrl);
607 pci_disable_msi(ctrl->pci_dev);
611 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
614 static int hpc_power_on_slot(struct slot *slot)
618 retval = shpc_write_cmd(slot, slot->hp_slot, SET_SLOT_PWR);
620 ctrl_err(slot->ctrl, "%s: Write command failed!\n", __func__);
625 static int hpc_slot_enable(struct slot *slot)
629 /* Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
630 retval = shpc_write_cmd(slot, slot->hp_slot,
631 SET_SLOT_ENABLE | SET_PWR_BLINK | SET_ATTN_OFF);
633 ctrl_err(slot->ctrl, "%s: Write command failed!\n", __func__);
638 static int hpc_slot_disable(struct slot *slot)
642 /* Slot - Disable, Power Indicator - Off, Attention Indicator - On */
643 retval = shpc_write_cmd(slot, slot->hp_slot,
644 SET_SLOT_DISABLE | SET_PWR_OFF | SET_ATTN_ON);
646 ctrl_err(slot->ctrl, "%s: Write command failed!\n", __func__);
651 static int shpc_get_cur_bus_speed(struct controller *ctrl)
654 struct pci_bus *bus = ctrl->pci_dev->subordinate;
655 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
656 u16 sec_bus_reg = shpc_readw(ctrl, SEC_BUS_CONFIG);
657 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
658 u8 speed_mode = (pi == 2) ? (sec_bus_reg & 0xF) : (sec_bus_reg & 0x7);
660 if ((pi == 1) && (speed_mode > 4)) {
665 switch (speed_mode) {
667 bus_speed = PCI_SPEED_33MHz;
670 bus_speed = PCI_SPEED_66MHz;
673 bus_speed = PCI_SPEED_66MHz_PCIX;
676 bus_speed = PCI_SPEED_100MHz_PCIX;
679 bus_speed = PCI_SPEED_133MHz_PCIX;
682 bus_speed = PCI_SPEED_66MHz_PCIX_ECC;
685 bus_speed = PCI_SPEED_100MHz_PCIX_ECC;
688 bus_speed = PCI_SPEED_133MHz_PCIX_ECC;
691 bus_speed = PCI_SPEED_66MHz_PCIX_266;
694 bus_speed = PCI_SPEED_100MHz_PCIX_266;
697 bus_speed = PCI_SPEED_133MHz_PCIX_266;
700 bus_speed = PCI_SPEED_66MHz_PCIX_533;
703 bus_speed = PCI_SPEED_100MHz_PCIX_533;
706 bus_speed = PCI_SPEED_133MHz_PCIX_533;
714 bus->cur_bus_speed = bus_speed;
715 dbg("Current bus speed = %d\n", bus_speed);
720 static int hpc_set_bus_speed_mode(struct slot *slot, enum pci_bus_speed value)
723 struct controller *ctrl = slot->ctrl;
726 pi = shpc_readb(ctrl, PROG_INTERFACE);
727 if ((pi == 1) && (value > PCI_SPEED_133MHz_PCIX))
731 case PCI_SPEED_33MHz:
732 cmd = SETA_PCI_33MHZ;
734 case PCI_SPEED_66MHz:
735 cmd = SETA_PCI_66MHZ;
737 case PCI_SPEED_66MHz_PCIX:
738 cmd = SETA_PCIX_66MHZ;
740 case PCI_SPEED_100MHz_PCIX:
741 cmd = SETA_PCIX_100MHZ;
743 case PCI_SPEED_133MHz_PCIX:
744 cmd = SETA_PCIX_133MHZ;
746 case PCI_SPEED_66MHz_PCIX_ECC:
747 cmd = SETB_PCIX_66MHZ_EM;
749 case PCI_SPEED_100MHz_PCIX_ECC:
750 cmd = SETB_PCIX_100MHZ_EM;
752 case PCI_SPEED_133MHz_PCIX_ECC:
753 cmd = SETB_PCIX_133MHZ_EM;
755 case PCI_SPEED_66MHz_PCIX_266:
756 cmd = SETB_PCIX_66MHZ_266;
758 case PCI_SPEED_100MHz_PCIX_266:
759 cmd = SETB_PCIX_100MHZ_266;
761 case PCI_SPEED_133MHz_PCIX_266:
762 cmd = SETB_PCIX_133MHZ_266;
764 case PCI_SPEED_66MHz_PCIX_533:
765 cmd = SETB_PCIX_66MHZ_533;
767 case PCI_SPEED_100MHz_PCIX_533:
768 cmd = SETB_PCIX_100MHZ_533;
770 case PCI_SPEED_133MHz_PCIX_533:
771 cmd = SETB_PCIX_133MHZ_533;
777 retval = shpc_write_cmd(slot, 0, cmd);
779 ctrl_err(ctrl, "%s: Write command failed!\n", __func__);
781 shpc_get_cur_bus_speed(ctrl);
786 static irqreturn_t shpc_isr(int irq, void *dev_id)
788 struct controller *ctrl = (struct controller *)dev_id;
789 u32 serr_int, slot_reg, intr_loc, intr_loc2;
792 /* Check to see if it was our interrupt */
793 intr_loc = shpc_readl(ctrl, INTR_LOC);
797 ctrl_dbg(ctrl, "%s: intr_loc = %x\n", __func__, intr_loc);
799 if (!shpchp_poll_mode) {
801 * Mask Global Interrupt Mask - see implementation
802 * note on p. 139 of SHPC spec rev 1.0
804 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
805 serr_int |= GLOBAL_INTR_MASK;
806 serr_int &= ~SERR_INTR_RSVDZ_MASK;
807 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
809 intr_loc2 = shpc_readl(ctrl, INTR_LOC);
810 ctrl_dbg(ctrl, "%s: intr_loc2 = %x\n", __func__, intr_loc2);
813 if (intr_loc & CMD_INTR_PENDING) {
815 * Command Complete Interrupt Pending
816 * RO only - clear by writing 1 to the Command Completion
817 * Detect bit in Controller SERR-INT register
819 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
820 serr_int &= ~SERR_INTR_RSVDZ_MASK;
821 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
823 wake_up_interruptible(&ctrl->queue);
826 if (!(intr_loc & ~CMD_INTR_PENDING))
829 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
830 /* To find out which slot has interrupt pending */
831 if (!(intr_loc & SLOT_INTR_PENDING(hp_slot)))
834 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
835 ctrl_dbg(ctrl, "Slot %x with intr, slot register = %x\n",
838 if (slot_reg & MRL_CHANGE_DETECTED)
839 shpchp_handle_switch_change(hp_slot, ctrl);
841 if (slot_reg & BUTTON_PRESS_DETECTED)
842 shpchp_handle_attention_button(hp_slot, ctrl);
844 if (slot_reg & PRSNT_CHANGE_DETECTED)
845 shpchp_handle_presence_change(hp_slot, ctrl);
847 if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))
848 shpchp_handle_power_fault(hp_slot, ctrl);
850 /* Clear all slot events */
851 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
852 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
855 if (!shpchp_poll_mode) {
856 /* Unmask Global Interrupt Mask */
857 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
858 serr_int &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK);
859 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
865 static int shpc_get_max_bus_speed(struct controller *ctrl)
868 struct pci_bus *bus = ctrl->pci_dev->subordinate;
869 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
870 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
871 u32 slot_avail1 = shpc_readl(ctrl, SLOT_AVAIL1);
872 u32 slot_avail2 = shpc_readl(ctrl, SLOT_AVAIL2);
875 if (slot_avail2 & SLOT_133MHZ_PCIX_533)
876 bus_speed = PCI_SPEED_133MHz_PCIX_533;
877 else if (slot_avail2 & SLOT_100MHZ_PCIX_533)
878 bus_speed = PCI_SPEED_100MHz_PCIX_533;
879 else if (slot_avail2 & SLOT_66MHZ_PCIX_533)
880 bus_speed = PCI_SPEED_66MHz_PCIX_533;
881 else if (slot_avail2 & SLOT_133MHZ_PCIX_266)
882 bus_speed = PCI_SPEED_133MHz_PCIX_266;
883 else if (slot_avail2 & SLOT_100MHZ_PCIX_266)
884 bus_speed = PCI_SPEED_100MHz_PCIX_266;
885 else if (slot_avail2 & SLOT_66MHZ_PCIX_266)
886 bus_speed = PCI_SPEED_66MHz_PCIX_266;
889 if (bus_speed == PCI_SPEED_UNKNOWN) {
890 if (slot_avail1 & SLOT_133MHZ_PCIX)
891 bus_speed = PCI_SPEED_133MHz_PCIX;
892 else if (slot_avail1 & SLOT_100MHZ_PCIX)
893 bus_speed = PCI_SPEED_100MHz_PCIX;
894 else if (slot_avail1 & SLOT_66MHZ_PCIX)
895 bus_speed = PCI_SPEED_66MHz_PCIX;
896 else if (slot_avail2 & SLOT_66MHZ)
897 bus_speed = PCI_SPEED_66MHz;
898 else if (slot_avail1 & SLOT_33MHZ)
899 bus_speed = PCI_SPEED_33MHz;
904 bus->max_bus_speed = bus_speed;
905 ctrl_dbg(ctrl, "Max bus speed = %d\n", bus_speed);
910 static const struct hpc_ops shpchp_hpc_ops = {
911 .power_on_slot = hpc_power_on_slot,
912 .slot_enable = hpc_slot_enable,
913 .slot_disable = hpc_slot_disable,
914 .set_bus_speed_mode = hpc_set_bus_speed_mode,
915 .set_attention_status = hpc_set_attention_status,
916 .get_power_status = hpc_get_power_status,
917 .get_attention_status = hpc_get_attention_status,
918 .get_latch_status = hpc_get_latch_status,
919 .get_adapter_status = hpc_get_adapter_status,
921 .get_adapter_speed = hpc_get_adapter_speed,
922 .get_mode1_ECC_cap = hpc_get_mode1_ECC_cap,
923 .get_prog_int = hpc_get_prog_int,
925 .query_power_fault = hpc_query_power_fault,
926 .green_led_on = hpc_set_green_led_on,
927 .green_led_off = hpc_set_green_led_off,
928 .green_led_blink = hpc_set_green_led_blink,
930 .release_ctlr = hpc_release_ctlr,
933 int shpc_init(struct controller *ctrl, struct pci_dev *pdev)
935 int rc = -1, num_slots = 0;
937 u32 shpc_base_offset;
938 u32 tempdword, slot_reg, slot_config;
941 ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */
942 ctrl_dbg(ctrl, "Hotplug Controller:\n");
944 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
945 pdev->device == PCI_DEVICE_ID_AMD_GOLAM_7450) {
946 /* amd shpc driver doesn't use Base Offset; assume 0 */
947 ctrl->mmio_base = pci_resource_start(pdev, 0);
948 ctrl->mmio_size = pci_resource_len(pdev, 0);
950 ctrl->cap_offset = pci_find_capability(pdev, PCI_CAP_ID_SHPC);
951 if (!ctrl->cap_offset) {
952 ctrl_err(ctrl, "Cannot find PCI capability\n");
955 ctrl_dbg(ctrl, " cap_offset = %x\n", ctrl->cap_offset);
957 rc = shpc_indirect_read(ctrl, 0, &shpc_base_offset);
959 ctrl_err(ctrl, "Cannot read base_offset\n");
963 rc = shpc_indirect_read(ctrl, 3, &tempdword);
965 ctrl_err(ctrl, "Cannot read slot config\n");
968 num_slots = tempdword & SLOT_NUM;
969 ctrl_dbg(ctrl, " num_slots (indirect) %x\n", num_slots);
971 for (i = 0; i < 9 + num_slots; i++) {
972 rc = shpc_indirect_read(ctrl, i, &tempdword);
974 ctrl_err(ctrl, "Cannot read creg (index = %d)\n",
978 ctrl_dbg(ctrl, " offset %d: value %x\n", i, tempdword);
982 pci_resource_start(pdev, 0) + shpc_base_offset;
983 ctrl->mmio_size = 0x24 + 0x4 * num_slots;
986 ctrl_info(ctrl, "HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n",
987 pdev->vendor, pdev->device, pdev->subsystem_vendor,
988 pdev->subsystem_device);
990 rc = pci_enable_device(pdev);
992 ctrl_err(ctrl, "pci_enable_device failed\n");
996 if (!request_mem_region(ctrl->mmio_base, ctrl->mmio_size, MY_NAME)) {
997 ctrl_err(ctrl, "Cannot reserve MMIO region\n");
1002 ctrl->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
1004 ctrl_err(ctrl, "Cannot remap MMIO region %lx @ %lx\n",
1005 ctrl->mmio_size, ctrl->mmio_base);
1006 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
1010 ctrl_dbg(ctrl, "ctrl->creg %p\n", ctrl->creg);
1012 mutex_init(&ctrl->crit_sect);
1013 mutex_init(&ctrl->cmd_lock);
1015 /* Setup wait queue */
1016 init_waitqueue_head(&ctrl->queue);
1018 ctrl->hpc_ops = &shpchp_hpc_ops;
1020 /* Return PCI Controller Info */
1021 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
1022 ctrl->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
1023 ctrl->num_slots = slot_config & SLOT_NUM;
1024 ctrl->first_slot = (slot_config & PSN) >> 16;
1025 ctrl->slot_num_inc = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
1027 /* Mask Global Interrupt Mask & Command Complete Interrupt Mask */
1028 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1029 ctrl_dbg(ctrl, "SERR_INTR_ENABLE = %x\n", tempdword);
1030 tempdword |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
1031 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
1032 tempdword &= ~SERR_INTR_RSVDZ_MASK;
1033 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1034 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1035 ctrl_dbg(ctrl, "SERR_INTR_ENABLE = %x\n", tempdword);
1037 /* Mask the MRL sensor SERR Mask of individual slot in
1038 * Slot SERR-INT Mask & clear all the existing event if any
1040 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
1041 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1042 ctrl_dbg(ctrl, "Default Logical Slot Register %d value %x\n",
1044 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1045 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1046 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
1047 CON_PFAULT_SERR_MASK);
1048 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
1049 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1052 if (shpchp_poll_mode) {
1053 /* Install interrupt polling timer. Start with 10 sec delay */
1054 timer_setup(&ctrl->poll_timer, int_poll_timeout, 0);
1055 start_int_poll_timer(ctrl, 10);
1057 /* Installs the interrupt handler */
1058 rc = pci_enable_msi(pdev);
1060 ctrl_info(ctrl, "Can't get msi for the hotplug controller\n");
1061 ctrl_info(ctrl, "Use INTx for the hotplug controller\n");
1063 pci_set_master(pdev);
1066 rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED,
1067 MY_NAME, (void *)ctrl);
1068 ctrl_dbg(ctrl, "request_irq %d (returns %d)\n",
1069 ctrl->pci_dev->irq, rc);
1071 ctrl_err(ctrl, "Can't get irq %d for the hotplug controller\n",
1072 ctrl->pci_dev->irq);
1076 ctrl_dbg(ctrl, "HPC at %s irq=%x\n", pci_name(pdev), pdev->irq);
1078 shpc_get_max_bus_speed(ctrl);
1079 shpc_get_cur_bus_speed(ctrl);
1082 * Unmask all event interrupts of all slots
1084 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
1085 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1086 ctrl_dbg(ctrl, "Default Logical Slot Register %d value %x\n",
1088 slot_reg &= ~(PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1089 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1090 CON_PFAULT_INTR_MASK | SLOT_REG_RSVDZ_MASK);
1091 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1093 if (!shpchp_poll_mode) {
1094 /* Unmask all general input interrupts and SERR */
1095 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1096 tempdword &= ~(GLOBAL_INTR_MASK | COMMAND_INTR_MASK |
1097 SERR_INTR_RSVDZ_MASK);
1098 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1099 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1100 ctrl_dbg(ctrl, "SERR_INTR_ENABLE = %x\n", tempdword);
1105 /* We end up here for the many possible ways to fail this API. */
1107 iounmap(ctrl->creg);