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>
39 #define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
40 #define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
41 #define DBG_K_INFO ((unsigned int)0x00000004) /* Info messages */
42 #define DBG_K_ERROR ((unsigned int)0x00000008) /* Error messages */
43 #define DBG_K_TRACE (DBG_K_TRACE_ENTRY|DBG_K_TRACE_EXIT)
44 #define DBG_K_STANDARD (DBG_K_INFO|DBG_K_ERROR|DBG_K_TRACE)
45 /* Redefine this flagword to set debug level */
46 #define DEBUG_LEVEL DBG_K_STANDARD
48 #define DEFINE_DBG_BUFFER char __dbg_str_buf[256];
50 #define DBG_PRINT( dbg_flags, args... ) \
52 if ( DEBUG_LEVEL & ( dbg_flags ) ) \
55 len = sprintf( __dbg_str_buf, "%s:%d: %s: ", \
56 __FILE__, __LINE__, __FUNCTION__ ); \
57 sprintf( __dbg_str_buf + len, args ); \
58 printk( KERN_NOTICE "%s\n", __dbg_str_buf ); \
62 #define DBG_ENTER_ROUTINE DBG_PRINT (DBG_K_TRACE_ENTRY, "%s", "[Entry]");
63 #define DBG_LEAVE_ROUTINE DBG_PRINT (DBG_K_TRACE_EXIT, "%s", "[Exit]");
65 #define DEFINE_DBG_BUFFER
66 #define DBG_ENTER_ROUTINE
67 #define DBG_LEAVE_ROUTINE
70 /* Slot Available Register I field definition */
71 #define SLOT_33MHZ 0x0000001f
72 #define SLOT_66MHZ_PCIX 0x00001f00
73 #define SLOT_100MHZ_PCIX 0x001f0000
74 #define SLOT_133MHZ_PCIX 0x1f000000
76 /* Slot Available Register II field definition */
77 #define SLOT_66MHZ 0x0000001f
78 #define SLOT_66MHZ_PCIX_266 0x00000f00
79 #define SLOT_100MHZ_PCIX_266 0x0000f000
80 #define SLOT_133MHZ_PCIX_266 0x000f0000
81 #define SLOT_66MHZ_PCIX_533 0x00f00000
82 #define SLOT_100MHZ_PCIX_533 0x0f000000
83 #define SLOT_133MHZ_PCIX_533 0xf0000000
85 /* Slot Configuration */
86 #define SLOT_NUM 0x0000001F
87 #define FIRST_DEV_NUM 0x00001F00
88 #define PSN 0x07FF0000
89 #define UPDOWN 0x20000000
90 #define MRLSENSOR 0x40000000
91 #define ATTN_BUTTON 0x80000000
94 * Interrupt Locator Register definitions
96 #define CMD_INTR_PENDING (1 << 0)
97 #define SLOT_INTR_PENDING(i) (1 << (i + 1))
100 * Controller SERR-INT Register
102 #define GLOBAL_INTR_MASK (1 << 0)
103 #define GLOBAL_SERR_MASK (1 << 1)
104 #define COMMAND_INTR_MASK (1 << 2)
105 #define ARBITER_SERR_MASK (1 << 3)
106 #define COMMAND_DETECTED (1 << 16)
107 #define ARBITER_DETECTED (1 << 17)
108 #define SERR_INTR_RSVDZ_MASK 0xfffc0000
111 * Logical Slot Register definitions
113 #define SLOT_REG(i) (SLOT1 + (4 * i))
115 #define SLOT_STATE_SHIFT (0)
116 #define SLOT_STATE_MASK (3 << 0)
117 #define SLOT_STATE_PWRONLY (1)
118 #define SLOT_STATE_ENABLED (2)
119 #define SLOT_STATE_DISABLED (3)
120 #define PWR_LED_STATE_SHIFT (2)
121 #define PWR_LED_STATE_MASK (3 << 2)
122 #define ATN_LED_STATE_SHIFT (4)
123 #define ATN_LED_STATE_MASK (3 << 4)
124 #define ATN_LED_STATE_ON (1)
125 #define ATN_LED_STATE_BLINK (2)
126 #define ATN_LED_STATE_OFF (3)
127 #define POWER_FAULT (1 << 6)
128 #define ATN_BUTTON (1 << 7)
129 #define MRL_SENSOR (1 << 8)
130 #define MHZ66_CAP (1 << 9)
131 #define PRSNT_SHIFT (10)
132 #define PRSNT_MASK (3 << 10)
133 #define PCIX_CAP_SHIFT (12)
134 #define PCIX_CAP_MASK_PI1 (3 << 12)
135 #define PCIX_CAP_MASK_PI2 (7 << 12)
136 #define PRSNT_CHANGE_DETECTED (1 << 16)
137 #define ISO_PFAULT_DETECTED (1 << 17)
138 #define BUTTON_PRESS_DETECTED (1 << 18)
139 #define MRL_CHANGE_DETECTED (1 << 19)
140 #define CON_PFAULT_DETECTED (1 << 20)
141 #define PRSNT_CHANGE_INTR_MASK (1 << 24)
142 #define ISO_PFAULT_INTR_MASK (1 << 25)
143 #define BUTTON_PRESS_INTR_MASK (1 << 26)
144 #define MRL_CHANGE_INTR_MASK (1 << 27)
145 #define CON_PFAULT_INTR_MASK (1 << 28)
146 #define MRL_CHANGE_SERR_MASK (1 << 29)
147 #define CON_PFAULT_SERR_MASK (1 << 30)
148 #define SLOT_REG_RSVDZ_MASK (1 << 15) | (7 << 21)
150 /* SHPC 'write' operations/commands */
152 /* Slot operation - 0x00h to 0x3Fh */
154 #define NO_CHANGE 0x00
156 /* Slot state - Bits 0 & 1 of controller command register */
157 #define SET_SLOT_PWR 0x01
158 #define SET_SLOT_ENABLE 0x02
159 #define SET_SLOT_DISABLE 0x03
161 /* Power indicator state - Bits 2 & 3 of controller command register*/
162 #define SET_PWR_ON 0x04
163 #define SET_PWR_BLINK 0x08
164 #define SET_PWR_OFF 0x0C
166 /* Attention indicator state - Bits 4 & 5 of controller command register*/
167 #define SET_ATTN_ON 0x010
168 #define SET_ATTN_BLINK 0x020
169 #define SET_ATTN_OFF 0x030
171 /* Set bus speed/mode A - 0x40h to 0x47h */
172 #define SETA_PCI_33MHZ 0x40
173 #define SETA_PCI_66MHZ 0x41
174 #define SETA_PCIX_66MHZ 0x42
175 #define SETA_PCIX_100MHZ 0x43
176 #define SETA_PCIX_133MHZ 0x44
177 #define RESERV_1 0x45
178 #define RESERV_2 0x46
179 #define RESERV_3 0x47
181 /* Set bus speed/mode B - 0x50h to 0x5fh */
182 #define SETB_PCI_33MHZ 0x50
183 #define SETB_PCI_66MHZ 0x51
184 #define SETB_PCIX_66MHZ_PM 0x52
185 #define SETB_PCIX_100MHZ_PM 0x53
186 #define SETB_PCIX_133MHZ_PM 0x54
187 #define SETB_PCIX_66MHZ_EM 0x55
188 #define SETB_PCIX_100MHZ_EM 0x56
189 #define SETB_PCIX_133MHZ_EM 0x57
190 #define SETB_PCIX_66MHZ_266 0x58
191 #define SETB_PCIX_100MHZ_266 0x59
192 #define SETB_PCIX_133MHZ_266 0x5a
193 #define SETB_PCIX_66MHZ_533 0x5b
194 #define SETB_PCIX_100MHZ_533 0x5c
195 #define SETB_PCIX_133MHZ_533 0x5d
198 /* Power-on all slots - 0x48h */
199 #define SET_PWR_ON_ALL 0x48
201 /* Enable all slots - 0x49h */
202 #define SET_ENABLE_ALL 0x49
204 /* SHPC controller command error code */
205 #define SWITCH_OPEN 0x1
206 #define INVALID_CMD 0x2
207 #define INVALID_SPEED_MODE 0x4
209 /* For accessing SHPC Working Register Set */
210 #define DWORD_SELECT 0x2
211 #define DWORD_DATA 0x4
212 #define BASE_OFFSET 0x0
214 /* Field Offset in Logical Slot Register - byte boundary */
215 #define SLOT_EVENT_LATCH 0x2
216 #define SLOT_SERR_INT_MASK 0x3
218 static spinlock_t hpc_event_lock;
220 DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
221 static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
222 static int ctlr_seq_num = 0; /* Controller sequenc # */
223 static spinlock_t list_lock;
225 static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
227 static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs);
229 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
230 static int hpc_check_cmd_status(struct controller *ctrl);
232 static inline u8 shpc_readb(struct controller *ctrl, int reg)
234 return readb(ctrl->hpc_ctlr_handle->creg + reg);
237 static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
239 writeb(val, ctrl->hpc_ctlr_handle->creg + reg);
242 static inline u16 shpc_readw(struct controller *ctrl, int reg)
244 return readw(ctrl->hpc_ctlr_handle->creg + reg);
247 static inline void shpc_writew(struct controller *ctrl, int reg, u16 val)
249 writew(val, ctrl->hpc_ctlr_handle->creg + reg);
252 static inline u32 shpc_readl(struct controller *ctrl, int reg)
254 return readl(ctrl->hpc_ctlr_handle->creg + reg);
257 static inline void shpc_writel(struct controller *ctrl, int reg, u32 val)
259 writel(val, ctrl->hpc_ctlr_handle->creg + reg);
262 static inline int shpc_indirect_read(struct controller *ctrl, int index,
266 u32 cap_offset = ctrl->cap_offset;
267 struct pci_dev *pdev = ctrl->pci_dev;
269 rc = pci_write_config_byte(pdev, cap_offset + DWORD_SELECT, index);
272 return pci_read_config_dword(pdev, cap_offset + DWORD_DATA, value);
275 /* This is the interrupt polling timeout function. */
276 static void int_poll_timeout(unsigned long lphp_ctlr)
278 struct php_ctlr_state_s *php_ctlr = (struct php_ctlr_state_s *)lphp_ctlr;
283 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
287 /* Poll for interrupt events. regs == NULL => polling */
288 shpc_isr(0, php_ctlr->callback_instance_id, NULL );
290 init_timer(&php_ctlr->int_poll_timer);
291 if (!shpchp_poll_time)
292 shpchp_poll_time = 2; /* reset timer to poll in 2 secs if user doesn't specify at module installation*/
294 start_int_poll_timer(php_ctlr, shpchp_poll_time);
299 /* This function starts the interrupt polling timer. */
300 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds)
303 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
307 if ( ( seconds <= 0 ) || ( seconds > 60 ) )
308 seconds = 2; /* Clamp to sane value */
310 php_ctlr->int_poll_timer.function = &int_poll_timeout;
311 php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr; /* Instance data */
312 php_ctlr->int_poll_timer.expires = jiffies + seconds * HZ;
313 add_timer(&php_ctlr->int_poll_timer);
318 static inline int shpc_wait_cmd(struct controller *ctrl)
321 unsigned int timeout_msec = shpchp_poll_mode ? 2000 : 1000;
322 unsigned long timeout = msecs_to_jiffies(timeout_msec);
323 int rc = wait_event_interruptible_timeout(ctrl->queue,
324 !ctrl->cmd_busy, timeout);
327 err("Command not completed in %d msec\n", timeout_msec);
330 info("Command was interrupted by a signal\n");
337 static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
339 struct controller *ctrl = slot->ctrl;
347 mutex_lock(&slot->ctrl->cmd_lock);
349 for (i = 0; i < 10; i++) {
350 cmd_status = shpc_readw(ctrl, CMD_STATUS);
352 if (!(cmd_status & 0x1))
354 /* Check every 0.1 sec for a total of 1 sec*/
358 cmd_status = shpc_readw(ctrl, CMD_STATUS);
360 if (cmd_status & 0x1) {
361 /* After 1 sec and and the controller is still busy */
362 err("%s : Controller is still busy after 1 sec.\n", __FUNCTION__);
368 temp_word = (t_slot << 8) | (cmd & 0xFF);
369 dbg("%s: t_slot %x cmd %x\n", __FUNCTION__, t_slot, cmd);
371 /* To make sure the Controller Busy bit is 0 before we send out the
374 slot->ctrl->cmd_busy = 1;
375 shpc_writew(ctrl, CMD, temp_word);
378 * Wait for command completion.
380 retval = shpc_wait_cmd(slot->ctrl);
384 cmd_status = hpc_check_cmd_status(slot->ctrl);
386 err("%s: Failed to issued command 0x%x (error code = %d)\n",
387 __FUNCTION__, cmd, cmd_status);
391 mutex_unlock(&slot->ctrl->cmd_lock);
397 static int hpc_check_cmd_status(struct controller *ctrl)
404 cmd_status = shpc_readw(ctrl, CMD_STATUS) & 0x000F;
406 switch (cmd_status >> 1) {
411 retval = SWITCH_OPEN;
412 err("%s: Switch opened!\n", __FUNCTION__);
415 retval = INVALID_CMD;
416 err("%s: Invalid HPC command!\n", __FUNCTION__);
419 retval = INVALID_SPEED_MODE;
420 err("%s: Invalid bus speed/mode!\n", __FUNCTION__);
431 static int hpc_get_attention_status(struct slot *slot, u8 *status)
433 struct controller *ctrl = slot->ctrl;
439 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
440 state = (slot_reg & ATN_LED_STATE_MASK) >> ATN_LED_STATE_SHIFT;
443 case ATN_LED_STATE_ON:
444 *status = 1; /* On */
446 case ATN_LED_STATE_BLINK:
447 *status = 2; /* Blink */
449 case ATN_LED_STATE_OFF:
450 *status = 0; /* Off */
453 *status = 0xFF; /* Reserved */
461 static int hpc_get_power_status(struct slot * slot, u8 *status)
463 struct controller *ctrl = slot->ctrl;
469 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
470 state = (slot_reg & SLOT_STATE_MASK) >> SLOT_STATE_SHIFT;
473 case SLOT_STATE_PWRONLY:
474 *status = 2; /* Powered only */
476 case SLOT_STATE_ENABLED:
477 *status = 1; /* Enabled */
479 case SLOT_STATE_DISABLED:
480 *status = 0; /* Disabled */
483 *status = 0xFF; /* Reserved */
492 static int hpc_get_latch_status(struct slot *slot, u8 *status)
494 struct controller *ctrl = slot->ctrl;
499 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
500 *status = !!(slot_reg & MRL_SENSOR); /* 0 -> close; 1 -> open */
506 static int hpc_get_adapter_status(struct slot *slot, u8 *status)
508 struct controller *ctrl = slot->ctrl;
514 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
515 state = (slot_reg & PRSNT_MASK) >> PRSNT_SHIFT;
516 *status = (state != 0x3) ? 1 : 0;
522 static int hpc_get_prog_int(struct slot *slot, u8 *prog_int)
524 struct controller *ctrl = slot->ctrl;
528 *prog_int = shpc_readb(ctrl, PROG_INTERFACE);
534 static int hpc_get_adapter_speed(struct slot *slot, enum pci_bus_speed *value)
537 struct controller *ctrl = slot->ctrl;
538 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
539 u8 m66_cap = !!(slot_reg & MHZ66_CAP);
544 if ((retval = hpc_get_prog_int(slot, &pi)))
549 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI1) >> PCIX_CAP_SHIFT;
552 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI2) >> PCIX_CAP_SHIFT;
558 dbg("%s: slot_reg = %x, pcix_cap = %x, m66_cap = %x\n",
559 __FUNCTION__, slot_reg, pcix_cap, m66_cap);
563 *value = m66_cap ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
566 *value = PCI_SPEED_66MHz_PCIX;
569 *value = PCI_SPEED_133MHz_PCIX;
572 *value = PCI_SPEED_133MHz_PCIX_266;
575 *value = PCI_SPEED_133MHz_PCIX_533;
579 *value = PCI_SPEED_UNKNOWN;
584 dbg("Adapter speed = %d\n", *value);
589 static int hpc_get_mode1_ECC_cap(struct slot *slot, u8 *mode)
591 struct controller *ctrl = slot->ctrl;
598 pi = shpc_readb(ctrl, PROG_INTERFACE);
599 sec_bus_status = shpc_readw(ctrl, SEC_BUS_CONFIG);
602 *mode = (sec_bus_status & 0x0100) >> 8;
607 dbg("Mode 1 ECC cap = %d\n", *mode);
613 static int hpc_query_power_fault(struct slot * slot)
615 struct controller *ctrl = slot->ctrl;
620 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
623 /* Note: Logic 0 => fault */
624 return !(slot_reg & POWER_FAULT);
627 static int hpc_set_attention_status(struct slot *slot, u8 value)
633 slot_cmd = 0x30; /* OFF */
636 slot_cmd = 0x10; /* ON */
639 slot_cmd = 0x20; /* BLINK */
645 return shpc_write_cmd(slot, slot->hp_slot, slot_cmd);
649 static void hpc_set_green_led_on(struct slot *slot)
651 shpc_write_cmd(slot, slot->hp_slot, 0x04);
654 static void hpc_set_green_led_off(struct slot *slot)
656 shpc_write_cmd(slot, slot->hp_slot, 0x0c);
659 static void hpc_set_green_led_blink(struct slot *slot)
661 shpc_write_cmd(slot, slot->hp_slot, 0x08);
664 int shpc_get_ctlr_slot_config(struct controller *ctrl,
665 int *num_ctlr_slots, /* number of slots in this HPC */
666 int *first_device_num, /* PCI dev num of the first slot in this SHPC */
667 int *physical_slot_num, /* phy slot num of the first slot in this SHPC */
668 int *updown, /* physical_slot_num increament: 1 or -1 */
675 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
676 *first_device_num = (slot_config & FIRST_DEV_NUM) >> 8;
677 *num_ctlr_slots = slot_config & SLOT_NUM;
678 *physical_slot_num = (slot_config & PSN) >> 16;
679 *updown = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
681 dbg("%s: physical_slot_num = %x\n", __FUNCTION__, *physical_slot_num);
687 static void hpc_release_ctlr(struct controller *ctrl)
689 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
690 struct php_ctlr_state_s *p, *p_prev;
692 u32 slot_reg, serr_int;
697 * Mask event interrupts and SERRs of all slots
699 for (i = 0; i < ctrl->num_slots; i++) {
700 slot_reg = shpc_readl(ctrl, SLOT_REG(i));
701 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
702 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
703 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
704 CON_PFAULT_SERR_MASK);
705 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
706 shpc_writel(ctrl, SLOT_REG(i), slot_reg);
712 * Mask SERR and System Interrut generation
714 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
715 serr_int |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
716 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
717 serr_int &= ~SERR_INTR_RSVDZ_MASK;
718 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
720 if (shpchp_poll_mode) {
721 del_timer(&php_ctlr->int_poll_timer);
724 free_irq(php_ctlr->irq, ctrl);
726 pci_disable_msi(php_ctlr->pci_dev);
730 if (php_ctlr->pci_dev) {
731 iounmap(php_ctlr->creg);
732 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
733 php_ctlr->pci_dev = NULL;
736 spin_lock(&list_lock);
737 p = php_ctlr_list_head;
742 p_prev->pnext = p->pnext;
744 php_ctlr_list_head = p->pnext;
751 spin_unlock(&list_lock);
756 * If this is the last controller to be released, destroy the
759 if (atomic_dec_and_test(&shpchp_num_controllers))
760 destroy_workqueue(shpchp_wq);
766 static int hpc_power_on_slot(struct slot * slot)
772 retval = shpc_write_cmd(slot, slot->hp_slot, 0x01);
774 err("%s: Write command failed!\n", __FUNCTION__);
783 static int hpc_slot_enable(struct slot * slot)
789 /* 3A => Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
790 retval = shpc_write_cmd(slot, slot->hp_slot, 0x3a);
792 err("%s: Write command failed!\n", __FUNCTION__);
800 static int hpc_slot_disable(struct slot * slot)
806 /* 1F => Slot - Disable, Power Indicator - Off, Attention Indicator - On */
807 retval = shpc_write_cmd(slot, slot->hp_slot, 0x1f);
809 err("%s: Write command failed!\n", __FUNCTION__);
817 static int hpc_set_bus_speed_mode(struct slot * slot, enum pci_bus_speed value)
820 struct controller *ctrl = slot->ctrl;
825 pi = shpc_readb(ctrl, PROG_INTERFACE);
826 if ((pi == 1) && (value > PCI_SPEED_133MHz_PCIX))
830 case PCI_SPEED_33MHz:
831 cmd = SETA_PCI_33MHZ;
833 case PCI_SPEED_66MHz:
834 cmd = SETA_PCI_66MHZ;
836 case PCI_SPEED_66MHz_PCIX:
837 cmd = SETA_PCIX_66MHZ;
839 case PCI_SPEED_100MHz_PCIX:
840 cmd = SETA_PCIX_100MHZ;
842 case PCI_SPEED_133MHz_PCIX:
843 cmd = SETA_PCIX_133MHZ;
845 case PCI_SPEED_66MHz_PCIX_ECC:
846 cmd = SETB_PCIX_66MHZ_EM;
848 case PCI_SPEED_100MHz_PCIX_ECC:
849 cmd = SETB_PCIX_100MHZ_EM;
851 case PCI_SPEED_133MHz_PCIX_ECC:
852 cmd = SETB_PCIX_133MHZ_EM;
854 case PCI_SPEED_66MHz_PCIX_266:
855 cmd = SETB_PCIX_66MHZ_266;
857 case PCI_SPEED_100MHz_PCIX_266:
858 cmd = SETB_PCIX_100MHZ_266;
860 case PCI_SPEED_133MHz_PCIX_266:
861 cmd = SETB_PCIX_133MHZ_266;
863 case PCI_SPEED_66MHz_PCIX_533:
864 cmd = SETB_PCIX_66MHZ_533;
866 case PCI_SPEED_100MHz_PCIX_533:
867 cmd = SETB_PCIX_100MHZ_533;
869 case PCI_SPEED_133MHz_PCIX_533:
870 cmd = SETB_PCIX_133MHZ_533;
876 retval = shpc_write_cmd(slot, 0, cmd);
878 err("%s: Write command failed!\n", __FUNCTION__);
884 static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs)
886 struct controller *ctrl = (struct controller *)dev_id;
887 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
888 u32 serr_int, slot_reg, intr_loc, intr_loc2;
891 /* Check to see if it was our interrupt */
892 intr_loc = shpc_readl(ctrl, INTR_LOC);
896 dbg("%s: intr_loc = %x\n",__FUNCTION__, intr_loc);
898 if(!shpchp_poll_mode) {
900 * Mask Global Interrupt Mask - see implementation
901 * note on p. 139 of SHPC spec rev 1.0
903 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
904 serr_int |= GLOBAL_INTR_MASK;
905 serr_int &= ~SERR_INTR_RSVDZ_MASK;
906 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
908 intr_loc2 = shpc_readl(ctrl, INTR_LOC);
909 dbg("%s: intr_loc2 = %x\n",__FUNCTION__, intr_loc2);
912 if (intr_loc & CMD_INTR_PENDING) {
914 * Command Complete Interrupt Pending
915 * RO only - clear by writing 1 to the Command Completion
916 * Detect bit in Controller SERR-INT register
918 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
919 serr_int &= ~SERR_INTR_RSVDZ_MASK;
920 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
923 wake_up_interruptible(&ctrl->queue);
926 if (!(intr_loc & ~CMD_INTR_PENDING))
929 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
930 /* To find out which slot has interrupt pending */
931 if (!(intr_loc & SLOT_INTR_PENDING(hp_slot)))
934 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
935 dbg("%s: Slot %x with intr, slot register = %x\n",
936 __FUNCTION__, hp_slot, slot_reg);
938 if (slot_reg & MRL_CHANGE_DETECTED)
939 php_ctlr->switch_change_callback(
940 hp_slot, php_ctlr->callback_instance_id);
942 if (slot_reg & BUTTON_PRESS_DETECTED)
943 php_ctlr->attention_button_callback(
944 hp_slot, php_ctlr->callback_instance_id);
946 if (slot_reg & PRSNT_CHANGE_DETECTED)
947 php_ctlr->presence_change_callback(
948 hp_slot , php_ctlr->callback_instance_id);
950 if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))
951 php_ctlr->power_fault_callback(
952 hp_slot, php_ctlr->callback_instance_id);
954 /* Clear all slot events */
955 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
956 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
959 if (!shpchp_poll_mode) {
960 /* Unmask Global Interrupt Mask */
961 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
962 serr_int &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK);
963 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
969 static int hpc_get_max_bus_speed (struct slot *slot, enum pci_bus_speed *value)
972 struct controller *ctrl = slot->ctrl;
973 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
974 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
975 u32 slot_avail1 = shpc_readl(ctrl, SLOT_AVAIL1);
976 u32 slot_avail2 = shpc_readl(ctrl, SLOT_AVAIL2);
981 if (slot_avail2 & SLOT_133MHZ_PCIX_533)
982 bus_speed = PCI_SPEED_133MHz_PCIX_533;
983 else if (slot_avail2 & SLOT_100MHZ_PCIX_533)
984 bus_speed = PCI_SPEED_100MHz_PCIX_533;
985 else if (slot_avail2 & SLOT_66MHZ_PCIX_533)
986 bus_speed = PCI_SPEED_66MHz_PCIX_533;
987 else if (slot_avail2 & SLOT_133MHZ_PCIX_266)
988 bus_speed = PCI_SPEED_133MHz_PCIX_266;
989 else if (slot_avail2 & SLOT_100MHZ_PCIX_266)
990 bus_speed = PCI_SPEED_100MHz_PCIX_266;
991 else if (slot_avail2 & SLOT_66MHZ_PCIX_266)
992 bus_speed = PCI_SPEED_66MHz_PCIX_266;
995 if (bus_speed == PCI_SPEED_UNKNOWN) {
996 if (slot_avail1 & SLOT_133MHZ_PCIX)
997 bus_speed = PCI_SPEED_133MHz_PCIX;
998 else if (slot_avail1 & SLOT_100MHZ_PCIX)
999 bus_speed = PCI_SPEED_100MHz_PCIX;
1000 else if (slot_avail1 & SLOT_66MHZ_PCIX)
1001 bus_speed = PCI_SPEED_66MHz_PCIX;
1002 else if (slot_avail2 & SLOT_66MHZ)
1003 bus_speed = PCI_SPEED_66MHz;
1004 else if (slot_avail1 & SLOT_33MHZ)
1005 bus_speed = PCI_SPEED_33MHz;
1011 dbg("Max bus speed = %d\n", bus_speed);
1016 static int hpc_get_cur_bus_speed (struct slot *slot, enum pci_bus_speed *value)
1019 struct controller *ctrl = slot->ctrl;
1020 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
1021 u16 sec_bus_reg = shpc_readw(ctrl, SEC_BUS_CONFIG);
1022 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
1023 u8 speed_mode = (pi == 2) ? (sec_bus_reg & 0xF) : (sec_bus_reg & 0x7);
1027 if ((pi == 1) && (speed_mode > 4)) {
1028 *value = PCI_SPEED_UNKNOWN;
1032 switch (speed_mode) {
1034 *value = PCI_SPEED_33MHz;
1037 *value = PCI_SPEED_66MHz;
1040 *value = PCI_SPEED_66MHz_PCIX;
1043 *value = PCI_SPEED_100MHz_PCIX;
1046 *value = PCI_SPEED_133MHz_PCIX;
1049 *value = PCI_SPEED_66MHz_PCIX_ECC;
1052 *value = PCI_SPEED_100MHz_PCIX_ECC;
1055 *value = PCI_SPEED_133MHz_PCIX_ECC;
1058 *value = PCI_SPEED_66MHz_PCIX_266;
1061 *value = PCI_SPEED_100MHz_PCIX_266;
1064 *value = PCI_SPEED_133MHz_PCIX_266;
1067 *value = PCI_SPEED_66MHz_PCIX_533;
1070 *value = PCI_SPEED_100MHz_PCIX_533;
1073 *value = PCI_SPEED_133MHz_PCIX_533;
1076 *value = PCI_SPEED_UNKNOWN;
1081 dbg("Current bus speed = %d\n", bus_speed);
1086 static struct hpc_ops shpchp_hpc_ops = {
1087 .power_on_slot = hpc_power_on_slot,
1088 .slot_enable = hpc_slot_enable,
1089 .slot_disable = hpc_slot_disable,
1090 .set_bus_speed_mode = hpc_set_bus_speed_mode,
1091 .set_attention_status = hpc_set_attention_status,
1092 .get_power_status = hpc_get_power_status,
1093 .get_attention_status = hpc_get_attention_status,
1094 .get_latch_status = hpc_get_latch_status,
1095 .get_adapter_status = hpc_get_adapter_status,
1097 .get_max_bus_speed = hpc_get_max_bus_speed,
1098 .get_cur_bus_speed = hpc_get_cur_bus_speed,
1099 .get_adapter_speed = hpc_get_adapter_speed,
1100 .get_mode1_ECC_cap = hpc_get_mode1_ECC_cap,
1101 .get_prog_int = hpc_get_prog_int,
1103 .query_power_fault = hpc_query_power_fault,
1104 .green_led_on = hpc_set_green_led_on,
1105 .green_led_off = hpc_set_green_led_off,
1106 .green_led_blink = hpc_set_green_led_blink,
1108 .release_ctlr = hpc_release_ctlr,
1111 int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
1113 struct php_ctlr_state_s *php_ctlr, *p;
1114 void *instance_id = ctrl;
1115 int rc, num_slots = 0;
1117 static int first = 1;
1118 u32 shpc_base_offset;
1119 u32 tempdword, slot_reg, slot_config;
1124 ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */
1126 spin_lock_init(&list_lock);
1127 php_ctlr = kzalloc(sizeof(*php_ctlr), GFP_KERNEL);
1129 if (!php_ctlr) { /* allocate controller state data */
1130 err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
1134 php_ctlr->pci_dev = pdev; /* save pci_dev in context */
1136 if ((pdev->vendor == PCI_VENDOR_ID_AMD) || (pdev->device ==
1137 PCI_DEVICE_ID_AMD_GOLAM_7450)) {
1138 /* amd shpc driver doesn't use Base Offset; assume 0 */
1139 ctrl->mmio_base = pci_resource_start(pdev, 0);
1140 ctrl->mmio_size = pci_resource_len(pdev, 0);
1142 ctrl->cap_offset = pci_find_capability(pdev, PCI_CAP_ID_SHPC);
1143 if (!ctrl->cap_offset) {
1144 err("%s : cap_offset == 0\n", __FUNCTION__);
1145 goto abort_free_ctlr;
1147 dbg("%s: cap_offset = %x\n", __FUNCTION__, ctrl->cap_offset);
1149 rc = shpc_indirect_read(ctrl, 0, &shpc_base_offset);
1151 err("%s: cannot read base_offset\n", __FUNCTION__);
1152 goto abort_free_ctlr;
1155 rc = shpc_indirect_read(ctrl, 3, &tempdword);
1157 err("%s: cannot read slot config\n", __FUNCTION__);
1158 goto abort_free_ctlr;
1160 num_slots = tempdword & SLOT_NUM;
1161 dbg("%s: num_slots (indirect) %x\n", __FUNCTION__, num_slots);
1163 for (i = 0; i < 9 + num_slots; i++) {
1164 rc = shpc_indirect_read(ctrl, i, &tempdword);
1166 err("%s: cannot read creg (index = %d)\n",
1168 goto abort_free_ctlr;
1170 dbg("%s: offset %d: value %x\n", __FUNCTION__,i,
1175 pci_resource_start(pdev, 0) + shpc_base_offset;
1176 ctrl->mmio_size = 0x24 + 0x4 * num_slots;
1180 spin_lock_init(&hpc_event_lock);
1184 info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor,
1185 pdev->subsystem_device);
1187 if (pci_enable_device(pdev))
1188 goto abort_free_ctlr;
1190 if (!request_mem_region(ctrl->mmio_base, ctrl->mmio_size, MY_NAME)) {
1191 err("%s: cannot reserve MMIO region\n", __FUNCTION__);
1192 goto abort_free_ctlr;
1195 php_ctlr->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
1196 if (!php_ctlr->creg) {
1197 err("%s: cannot remap MMIO region %lx @ %lx\n", __FUNCTION__,
1198 ctrl->mmio_size, ctrl->mmio_base);
1199 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
1200 goto abort_free_ctlr;
1202 dbg("%s: php_ctlr->creg %p\n", __FUNCTION__, php_ctlr->creg);
1204 mutex_init(&ctrl->crit_sect);
1205 mutex_init(&ctrl->cmd_lock);
1207 /* Setup wait queue */
1208 init_waitqueue_head(&ctrl->queue);
1211 php_ctlr->irq = pdev->irq;
1212 php_ctlr->attention_button_callback = shpchp_handle_attention_button,
1213 php_ctlr->switch_change_callback = shpchp_handle_switch_change;
1214 php_ctlr->presence_change_callback = shpchp_handle_presence_change;
1215 php_ctlr->power_fault_callback = shpchp_handle_power_fault;
1216 php_ctlr->callback_instance_id = instance_id;
1218 ctrl->hpc_ctlr_handle = php_ctlr;
1219 ctrl->hpc_ops = &shpchp_hpc_ops;
1221 /* Return PCI Controller Info */
1222 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
1223 php_ctlr->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
1224 php_ctlr->num_slots = slot_config & SLOT_NUM;
1225 dbg("%s: slot_device_offset %x\n", __FUNCTION__, php_ctlr->slot_device_offset);
1226 dbg("%s: num_slots %x\n", __FUNCTION__, php_ctlr->num_slots);
1228 /* Mask Global Interrupt Mask & Command Complete Interrupt Mask */
1229 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1230 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1231 tempdword |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
1232 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
1233 tempdword &= ~SERR_INTR_RSVDZ_MASK;
1234 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1235 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1236 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1238 /* Mask the MRL sensor SERR Mask of individual slot in
1239 * Slot SERR-INT Mask & clear all the existing event if any
1241 for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
1242 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1243 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
1245 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1246 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1247 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
1248 CON_PFAULT_SERR_MASK);
1249 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
1250 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1253 if (shpchp_poll_mode) {/* Install interrupt polling code */
1254 /* Install and start the interrupt polling timer */
1255 init_timer(&php_ctlr->int_poll_timer);
1256 start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
1258 /* Installs the interrupt handler */
1259 rc = pci_enable_msi(pdev);
1261 info("Can't get msi for the hotplug controller\n");
1262 info("Use INTx for the hotplug controller\n");
1264 php_ctlr->irq = pdev->irq;
1266 rc = request_irq(php_ctlr->irq, shpc_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
1267 dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
1269 err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
1270 goto abort_free_ctlr;
1273 dbg("%s: HPC at b:d:f:irq=0x%x:%x:%x:%x\n", __FUNCTION__,
1274 pdev->bus->number, PCI_SLOT(pdev->devfn),
1275 PCI_FUNC(pdev->devfn), pdev->irq);
1276 get_hp_hw_control_from_firmware(pdev);
1278 /* Add this HPC instance into the HPC list */
1279 spin_lock(&list_lock);
1280 if (php_ctlr_list_head == 0) {
1281 php_ctlr_list_head = php_ctlr;
1282 p = php_ctlr_list_head;
1285 p = php_ctlr_list_head;
1290 p->pnext = php_ctlr;
1292 spin_unlock(&list_lock);
1297 * If this is the first controller to be initialized,
1298 * initialize the shpchpd work queue
1300 if (atomic_add_return(1, &shpchp_num_controllers) == 1) {
1301 shpchp_wq = create_singlethread_workqueue("shpchpd");
1307 * Unmask all event interrupts of all slots
1309 for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
1310 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1311 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
1313 slot_reg &= ~(PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1314 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1315 CON_PFAULT_INTR_MASK | SLOT_REG_RSVDZ_MASK);
1316 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1318 if (!shpchp_poll_mode) {
1319 /* Unmask all general input interrupts and SERR */
1320 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1321 tempdword &= ~(GLOBAL_INTR_MASK | COMMAND_INTR_MASK |
1322 SERR_INTR_RSVDZ_MASK);
1323 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1324 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1325 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1331 /* We end up here for the many possible ways to fail this API. */