2 * intel_scu_ipc.c: Driver for the Intel SCU IPC mechanism
4 * (C) Copyright 2008-2010 Intel Corporation
5 * Author: Sreedhara DS (sreedhara.ds@intel.com)
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; version 2
12 * SCU runing in ARC processor communicates with other entity running in IA
13 * core through IPC mechanism which in turn messaging between IA core ad SCU.
14 * SCU has two IPC mechanism IPC-1 and IPC-2. IPC-1 is used between IA32 and
15 * SCU where IPC-2 is used between P-Unit and SCU. This driver delas with
16 * IPC-1 Driver provides an API for power control unit registers (e.g. MSIC)
17 * along with other APIs.
19 #include <linux/delay.h>
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/sysdev.h>
24 #include <linux/pci.h>
25 #include <linux/interrupt.h>
26 #include <linux/sfi.h>
28 #include <asm/intel_scu_ipc.h>
30 /* IPC defines the following message types */
31 #define IPCMSG_WATCHDOG_TIMER 0xF8 /* Set Kernel Watchdog Threshold */
32 #define IPCMSG_BATTERY 0xEF /* Coulomb Counter Accumulator */
33 #define IPCMSG_FW_UPDATE 0xFE /* Firmware update */
34 #define IPCMSG_PCNTRL 0xFF /* Power controller unit read/write */
35 #define IPCMSG_FW_REVISION 0xF4 /* Get firmware revision */
37 /* Command id associated with message IPCMSG_PCNTRL */
38 #define IPC_CMD_PCNTRL_W 0 /* Register write */
39 #define IPC_CMD_PCNTRL_R 1 /* Register read */
40 #define IPC_CMD_PCNTRL_M 2 /* Register read-modify-write */
43 * IPC register summary
45 * IPC register blocks are memory mapped at fixed address of 0xFF11C000
46 * To read or write information to the SCU, driver writes to IPC-1 memory
47 * mapped registers (base address 0xFF11C000). The following is the IPC
50 * 1. IA core cDMI interface claims this transaction and converts it to a
51 * Transaction Layer Packet (TLP) message which is sent across the cDMI.
53 * 2. South Complex cDMI block receives this message and writes it to
54 * the IPC-1 register block, causing an interrupt to the SCU
56 * 3. SCU firmware decodes this interrupt and IPC message and the appropriate
57 * message handler is called within firmware.
60 #define IPC_BASE_ADDR 0xFF11C000 /* IPC1 base register address */
61 #define IPC_MAX_ADDR 0x100 /* Maximum IPC regisers */
62 #define IPC_WWBUF_SIZE 20 /* IPC Write buffer Size */
63 #define IPC_RWBUF_SIZE 20 /* IPC Read buffer Size */
64 #define IPC_I2C_BASE 0xFF12B000 /* I2C control register base address */
65 #define IPC_I2C_MAX_ADDR 0x10 /* Maximum I2C regisers */
67 static int ipc_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
);
68 static void ipc_remove(struct pci_dev
*pdev
);
70 struct intel_scu_ipc_dev
{
72 void __iomem
*ipc_base
;
73 void __iomem
*i2c_base
;
76 static struct intel_scu_ipc_dev ipcdev
; /* Only one for now */
78 static int platform
; /* Platform type */
81 * IPC Read Buffer (Read Only):
82 * 16 byte buffer for receiving data from SCU, if IPC command
83 * processing results in response data
85 #define IPC_READ_BUFFER 0x90
87 #define IPC_I2C_CNTRL_ADDR 0
88 #define I2C_DATA_ADDR 0x04
90 static DEFINE_MUTEX(ipclock
); /* lock used to prevent multiple call to SCU */
93 * Command Register (Write Only):
94 * A write to this register results in an interrupt to the SCU core processor
96 * |rfu2(8) | size(8) | command id(4) | rfu1(3) | ioc(1) | command(8)|
98 static inline void ipc_command(u32 cmd
) /* Send ipc command */
100 writel(cmd
, ipcdev
.ipc_base
);
104 * IPC Write Buffer (Write Only):
105 * 16-byte buffer for sending data associated with IPC command to
106 * SCU. Size of the data is specified in the IPC_COMMAND_REG register
108 static inline void ipc_data_writel(u32 data
, u32 offset
) /* Write ipc data */
110 writel(data
, ipcdev
.ipc_base
+ 0x80 + offset
);
114 * Status Register (Read Only):
115 * Driver will read this register to get the ready/busy status of the IPC
116 * block and error status of the IPC command that was just processed by SCU
118 * |rfu3(8)|error code(8)|initiator id(8)|cmd id(4)|rfu1(2)|error(1)|busy(1)|
121 static inline u8
ipc_read_status(void)
123 return __raw_readl(ipcdev
.ipc_base
+ 0x04);
126 static inline u8
ipc_data_readb(u32 offset
) /* Read ipc byte data */
128 return readb(ipcdev
.ipc_base
+ IPC_READ_BUFFER
+ offset
);
131 static inline u32
ipc_data_readl(u32 offset
) /* Read ipc u32 data */
133 return readl(ipcdev
.ipc_base
+ IPC_READ_BUFFER
+ offset
);
136 static inline int busy_loop(void) /* Wait till scu status is busy */
141 status
= ipc_read_status();
143 udelay(1); /* scu processing time is in few u secods */
144 status
= ipc_read_status();
146 /* break if scu doesn't reset busy bit after huge retry */
147 if (loop_count
> 100000) {
148 dev_err(&ipcdev
.pdev
->dev
, "IPC timed out");
152 if ((status
>> 1) & 1)
158 /* Read/Write power control(PMIC in Langwell, MSIC in PenWell) registers */
159 static int pwr_reg_rdwr(u16
*addr
, u8
*data
, u32 count
, u32 op
, u32 id
)
164 u8 cbuf
[IPC_WWBUF_SIZE
] = { };
165 u32
*wbuf
= (u32
*)&cbuf
;
167 mutex_lock(&ipclock
);
169 memset(cbuf
, 0, sizeof(cbuf
));
171 if (ipcdev
.pdev
== NULL
) {
172 mutex_unlock(&ipclock
);
176 if (platform
!= MRST_CPU_CHIP_PENWELL
) {
179 for (i
= 0; i
< count
; i
++) {
180 cbuf
[bytes
++] = addr
[i
];
181 cbuf
[bytes
++] = addr
[i
] >> 8;
182 if (id
!= IPC_CMD_PCNTRL_R
)
183 cbuf
[bytes
++] = data
[d
++];
184 if (id
== IPC_CMD_PCNTRL_M
)
185 cbuf
[bytes
++] = data
[d
++];
187 for (i
= 0; i
< bytes
; i
+= 4)
188 ipc_data_writel(wbuf
[i
/4], i
);
189 ipc_command(bytes
<< 16 | id
<< 12 | 0 << 8 | op
);
191 for (nc
= 0; nc
< count
; nc
++, offset
+= 2) {
192 cbuf
[offset
] = addr
[nc
];
193 cbuf
[offset
+ 1] = addr
[nc
] >> 8;
196 if (id
== IPC_CMD_PCNTRL_R
) {
197 for (nc
= 0, offset
= 0; nc
< count
; nc
++, offset
+= 4)
198 ipc_data_writel(wbuf
[nc
], offset
);
199 ipc_command((count
*2) << 16 | id
<< 12 | 0 << 8 | op
);
200 } else if (id
== IPC_CMD_PCNTRL_W
) {
201 for (nc
= 0; nc
< count
; nc
++, offset
+= 1)
202 cbuf
[offset
] = data
[nc
];
203 for (nc
= 0, offset
= 0; nc
< count
; nc
++, offset
+= 4)
204 ipc_data_writel(wbuf
[nc
], offset
);
205 ipc_command((count
*3) << 16 | id
<< 12 | 0 << 8 | op
);
206 } else if (id
== IPC_CMD_PCNTRL_M
) {
207 cbuf
[offset
] = data
[0];
208 cbuf
[offset
+ 1] = data
[1];
209 ipc_data_writel(wbuf
[0], 0); /* Write wbuff */
210 ipc_command(4 << 16 | id
<< 12 | 0 << 8 | op
);
215 if (id
== IPC_CMD_PCNTRL_R
) { /* Read rbuf */
216 /* Workaround: values are read as 0 without memcpy_fromio */
217 memcpy_fromio(cbuf
, ipcdev
.ipc_base
+ 0x90, 16);
218 if (platform
!= MRST_CPU_CHIP_PENWELL
) {
219 for (nc
= 0, offset
= 2; nc
< count
; nc
++, offset
+= 3)
220 data
[nc
] = ipc_data_readb(offset
);
222 for (nc
= 0; nc
< count
; nc
++)
223 data
[nc
] = ipc_data_readb(nc
);
226 mutex_unlock(&ipclock
);
231 * intel_scu_ipc_ioread8 - read a word via the SCU
232 * @addr: register on SCU
233 * @data: return pointer for read byte
235 * Read a single register. Returns 0 on success or an error code. All
236 * locking between SCU accesses is handled for the caller.
238 * This function may sleep.
240 int intel_scu_ipc_ioread8(u16 addr
, u8
*data
)
242 return pwr_reg_rdwr(&addr
, data
, 1, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_R
);
244 EXPORT_SYMBOL(intel_scu_ipc_ioread8
);
247 * intel_scu_ipc_ioread16 - read a word via the SCU
248 * @addr: register on SCU
249 * @data: return pointer for read word
251 * Read a register pair. Returns 0 on success or an error code. All
252 * locking between SCU accesses is handled for the caller.
254 * This function may sleep.
256 int intel_scu_ipc_ioread16(u16 addr
, u16
*data
)
258 u16 x
[2] = {addr
, addr
+ 1 };
259 return pwr_reg_rdwr(x
, (u8
*)data
, 2, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_R
);
261 EXPORT_SYMBOL(intel_scu_ipc_ioread16
);
264 * intel_scu_ipc_ioread32 - read a dword via the SCU
265 * @addr: register on SCU
266 * @data: return pointer for read dword
268 * Read four registers. Returns 0 on success or an error code. All
269 * locking between SCU accesses is handled for the caller.
271 * This function may sleep.
273 int intel_scu_ipc_ioread32(u16 addr
, u32
*data
)
275 u16 x
[4] = {addr
, addr
+ 1, addr
+ 2, addr
+ 3};
276 return pwr_reg_rdwr(x
, (u8
*)data
, 4, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_R
);
278 EXPORT_SYMBOL(intel_scu_ipc_ioread32
);
281 * intel_scu_ipc_iowrite8 - write a byte via the SCU
282 * @addr: register on SCU
283 * @data: byte to write
285 * Write a single register. Returns 0 on success or an error code. All
286 * locking between SCU accesses is handled for the caller.
288 * This function may sleep.
290 int intel_scu_ipc_iowrite8(u16 addr
, u8 data
)
292 return pwr_reg_rdwr(&addr
, &data
, 1, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_W
);
294 EXPORT_SYMBOL(intel_scu_ipc_iowrite8
);
297 * intel_scu_ipc_iowrite16 - write a word via the SCU
298 * @addr: register on SCU
299 * @data: word to write
301 * Write two registers. Returns 0 on success or an error code. All
302 * locking between SCU accesses is handled for the caller.
304 * This function may sleep.
306 int intel_scu_ipc_iowrite16(u16 addr
, u16 data
)
308 u16 x
[2] = {addr
, addr
+ 1 };
309 return pwr_reg_rdwr(x
, (u8
*)&data
, 2, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_W
);
311 EXPORT_SYMBOL(intel_scu_ipc_iowrite16
);
314 * intel_scu_ipc_iowrite32 - write a dword via the SCU
315 * @addr: register on SCU
316 * @data: dword to write
318 * Write four registers. Returns 0 on success or an error code. All
319 * locking between SCU accesses is handled for the caller.
321 * This function may sleep.
323 int intel_scu_ipc_iowrite32(u16 addr
, u32 data
)
325 u16 x
[4] = {addr
, addr
+ 1, addr
+ 2, addr
+ 3};
326 return pwr_reg_rdwr(x
, (u8
*)&data
, 4, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_W
);
328 EXPORT_SYMBOL(intel_scu_ipc_iowrite32
);
331 * intel_scu_ipc_readvv - read a set of registers
332 * @addr: register list
333 * @data: bytes to return
334 * @len: length of array
336 * Read registers. Returns 0 on success or an error code. All
337 * locking between SCU accesses is handled for the caller.
339 * The largest array length permitted by the hardware is 5 items.
341 * This function may sleep.
343 int intel_scu_ipc_readv(u16
*addr
, u8
*data
, int len
)
345 return pwr_reg_rdwr(addr
, data
, len
, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_R
);
347 EXPORT_SYMBOL(intel_scu_ipc_readv
);
350 * intel_scu_ipc_writev - write a set of registers
351 * @addr: register list
352 * @data: bytes to write
353 * @len: length of array
355 * Write registers. Returns 0 on success or an error code. All
356 * locking between SCU accesses is handled for the caller.
358 * The largest array length permitted by the hardware is 5 items.
360 * This function may sleep.
363 int intel_scu_ipc_writev(u16
*addr
, u8
*data
, int len
)
365 return pwr_reg_rdwr(addr
, data
, len
, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_W
);
367 EXPORT_SYMBOL(intel_scu_ipc_writev
);
371 * intel_scu_ipc_update_register - r/m/w a register
372 * @addr: register address
373 * @bits: bits to update
374 * @mask: mask of bits to update
376 * Read-modify-write power control unit register. The first data argument
377 * must be register value and second is mask value
378 * mask is a bitmap that indicates which bits to update.
379 * 0 = masked. Don't modify this bit, 1 = modify this bit.
380 * returns 0 on success or an error code.
382 * This function may sleep. Locking between SCU accesses is handled
385 int intel_scu_ipc_update_register(u16 addr
, u8 bits
, u8 mask
)
387 u8 data
[2] = { bits
, mask
};
388 return pwr_reg_rdwr(&addr
, data
, 1, IPCMSG_PCNTRL
, IPC_CMD_PCNTRL_M
);
390 EXPORT_SYMBOL(intel_scu_ipc_update_register
);
393 * intel_scu_ipc_simple_command - send a simple command
397 * Issue a simple command to the SCU. Do not use this interface if
398 * you must then access data as any data values may be overwritten
399 * by another SCU access by the time this function returns.
401 * This function may sleep. Locking for SCU accesses is handled for
404 int intel_scu_ipc_simple_command(int cmd
, int sub
)
408 mutex_lock(&ipclock
);
409 if (ipcdev
.pdev
== NULL
) {
410 mutex_unlock(&ipclock
);
413 ipc_command(sub
<< 12 | cmd
);
415 mutex_unlock(&ipclock
);
418 EXPORT_SYMBOL(intel_scu_ipc_simple_command
);
421 * intel_scu_ipc_command - command with data
425 * @inlen: input length in dwords
427 * @outlein: output length in dwords
429 * Issue a command to the SCU which involves data transfers. Do the
430 * data copies under the lock but leave it for the caller to interpret
433 int intel_scu_ipc_command(int cmd
, int sub
, u32
*in
, int inlen
,
434 u32
*out
, int outlen
)
439 mutex_lock(&ipclock
);
440 if (ipcdev
.pdev
== NULL
) {
441 mutex_unlock(&ipclock
);
445 for (i
= 0; i
< inlen
; i
++)
446 ipc_data_writel(*in
++, 4 * i
);
448 ipc_command((inlen
<< 16) | (sub
<< 12) | cmd
);
451 for (i
= 0; i
< outlen
; i
++)
452 *out
++ = ipc_data_readl(4 * i
);
454 mutex_unlock(&ipclock
);
457 EXPORT_SYMBOL(intel_scu_ipc_command
);
460 #define IPC_I2C_WRITE 1 /* I2C Write command */
461 #define IPC_I2C_READ 2 /* I2C Read command */
464 * intel_scu_ipc_i2c_cntrl - I2C read/write operations
465 * @addr: I2C address + command bits
466 * @data: data to read/write
468 * Perform an an I2C read/write operation via the SCU. All locking is
469 * handled for the caller. This function may sleep.
471 * Returns an error code or 0 on success.
473 * This has to be in the IPC driver for the locking.
475 int intel_scu_ipc_i2c_cntrl(u32 addr
, u32
*data
)
479 mutex_lock(&ipclock
);
480 if (ipcdev
.pdev
== NULL
) {
481 mutex_unlock(&ipclock
);
484 cmd
= (addr
>> 24) & 0xFF;
485 if (cmd
== IPC_I2C_READ
) {
486 writel(addr
, ipcdev
.i2c_base
+ IPC_I2C_CNTRL_ADDR
);
487 /* Write not getting updated without delay */
489 *data
= readl(ipcdev
.i2c_base
+ I2C_DATA_ADDR
);
490 } else if (cmd
== IPC_I2C_WRITE
) {
491 writel(*data
, ipcdev
.i2c_base
+ I2C_DATA_ADDR
);
493 writel(addr
, ipcdev
.i2c_base
+ IPC_I2C_CNTRL_ADDR
);
495 dev_err(&ipcdev
.pdev
->dev
,
496 "intel_scu_ipc: I2C INVALID_CMD = 0x%x\n", cmd
);
498 mutex_unlock(&ipclock
);
501 mutex_unlock(&ipclock
);
504 EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl
);
506 #define IPC_FW_LOAD_ADDR 0xFFFC0000 /* Storage location for FW image */
507 #define IPC_FW_UPDATE_MBOX_ADDR 0xFFFFDFF4 /* Mailbox between ipc and scu */
508 #define IPC_MAX_FW_SIZE 262144 /* 256K storage size for loading the FW image */
509 #define IPC_FW_MIP_HEADER_SIZE 2048 /* Firmware MIP header size */
510 /* IPC inform SCU to get ready for update process */
511 #define IPC_CMD_FW_UPDATE_READY 0x10FE
512 /* IPC inform SCU to go for update process */
513 #define IPC_CMD_FW_UPDATE_GO 0x20FE
514 /* Status code for fw update */
515 #define IPC_FW_UPDATE_SUCCESS 0x444f4e45 /* Status code 'DONE' */
516 #define IPC_FW_UPDATE_BADN 0x4241444E /* Status code 'BADN' */
517 #define IPC_FW_TXHIGH 0x54784849 /* Status code 'IPC_FW_TXHIGH' */
518 #define IPC_FW_TXLOW 0x54784c4f /* Status code 'IPC_FW_TXLOW' */
520 struct fw_update_mailbox
{
528 * intel_scu_ipc_fw_update - Firmware update utility
529 * @buffer: firmware buffer
530 * @length: size of firmware buffer
532 * This function provides an interface to load the firmware into
533 * the SCU. Returns 0 on success or -1 on failure
535 int intel_scu_ipc_fw_update(u8
*buffer
, u32 length
)
537 void __iomem
*fw_update_base
;
538 struct fw_update_mailbox __iomem
*mailbox
= NULL
;
542 mutex_lock(&ipclock
);
543 fw_update_base
= ioremap_nocache(IPC_FW_LOAD_ADDR
, (128*1024));
544 if (fw_update_base
== NULL
) {
545 mutex_unlock(&ipclock
);
548 mailbox
= ioremap_nocache(IPC_FW_UPDATE_MBOX_ADDR
,
549 sizeof(struct fw_update_mailbox
));
550 if (mailbox
== NULL
) {
551 iounmap(fw_update_base
);
552 mutex_unlock(&ipclock
);
556 ipc_command(IPC_CMD_FW_UPDATE_READY
);
558 /* Intitialize mailbox */
559 writel(0, &mailbox
->status
);
560 writel(0, &mailbox
->scu_flag
);
561 writel(0, &mailbox
->driver_flag
);
563 /* Driver copies the 2KB MIP header to SRAM at 0xFFFC0000*/
564 memcpy_toio(fw_update_base
, buffer
, 0x800);
566 /* Driver sends "FW Update" IPC command (CMD_ID 0xFE; MSG_ID 0x02).
567 * Upon receiving this command, SCU will write the 2K MIP header
568 * from 0xFFFC0000 into NAND.
569 * SCU will write a status code into the Mailbox, and then set scu_flag.
572 ipc_command(IPC_CMD_FW_UPDATE_GO
);
574 /*Driver stalls until scu_flag is set */
575 while (readl(&mailbox
->scu_flag
) != 1) {
580 /* Driver checks Mailbox status.
581 * If the status is 'BADN', then abort (bad NAND).
582 * If the status is 'IPC_FW_TXLOW', then continue.
584 while (readl(&mailbox
->status
) != IPC_FW_TXLOW
) {
594 if (readl(&mailbox
->status
) != IPC_FW_TXLOW
)
596 buffer
= buffer
+ 0x800;
597 memcpy_toio(fw_update_base
, buffer
, 0x20000);
598 writel(1, &mailbox
->driver_flag
);
599 while (readl(&mailbox
->scu_flag
) == 1) {
604 /* check for 'BADN' */
605 if (readl(&mailbox
->status
) == IPC_FW_UPDATE_BADN
)
608 while (readl(&mailbox
->status
) != IPC_FW_TXHIGH
) {
614 if (readl(&mailbox
->status
) != IPC_FW_TXHIGH
)
617 buffer
= buffer
+ 0x20000;
618 memcpy_toio(fw_update_base
, buffer
, 0x20000);
619 writel(0, &mailbox
->driver_flag
);
621 while (mailbox
->scu_flag
== 0) {
626 /* check for 'BADN' */
627 if (readl(&mailbox
->status
) == IPC_FW_UPDATE_BADN
)
630 if (readl(&mailbox
->status
) == IPC_FW_TXLOW
) {
636 status
= readl(&mailbox
->status
);
638 iounmap(fw_update_base
);
640 mutex_unlock(&ipclock
);
642 if (status
== IPC_FW_UPDATE_SUCCESS
)
646 EXPORT_SYMBOL(intel_scu_ipc_fw_update
);
649 * Interrupt handler gets called when ioc bit of IPC_COMMAND_REG set to 1
650 * When ioc bit is set to 1, caller api must wait for interrupt handler called
651 * which in turn unlocks the caller api. Currently this is not used
653 * This is edge triggered so we need take no action to clear anything
655 static irqreturn_t
ioc(int irq
, void *dev_id
)
661 * ipc_probe - probe an Intel SCU IPC
662 * @dev: the PCI device matching
663 * @id: entry in the match table
665 * Enable and install an intel SCU IPC. This appears in the PCI space
666 * but uses some hard coded addresses as well.
668 static int ipc_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
671 resource_size_t pci_resource
;
673 if (ipcdev
.pdev
) /* We support only one SCU */
676 ipcdev
.pdev
= pci_dev_get(dev
);
678 err
= pci_enable_device(dev
);
682 err
= pci_request_regions(dev
, "intel_scu_ipc");
686 pci_resource
= pci_resource_start(dev
, 0);
690 if (request_irq(dev
->irq
, ioc
, 0, "intel_scu_ipc", &ipcdev
))
693 ipcdev
.ipc_base
= ioremap_nocache(IPC_BASE_ADDR
, IPC_MAX_ADDR
);
694 if (!ipcdev
.ipc_base
)
697 ipcdev
.i2c_base
= ioremap_nocache(IPC_I2C_BASE
, IPC_I2C_MAX_ADDR
);
698 if (!ipcdev
.i2c_base
) {
699 iounmap(ipcdev
.ipc_base
);
706 * ipc_remove - remove a bound IPC device
709 * In practice the SCU is not removable but this function is also
710 * called for each device on a module unload or cleanup which is the
711 * path that will get used.
713 * Free up the mappings and release the PCI resources
715 static void ipc_remove(struct pci_dev
*pdev
)
717 free_irq(pdev
->irq
, &ipcdev
);
718 pci_release_regions(pdev
);
719 pci_dev_put(ipcdev
.pdev
);
720 iounmap(ipcdev
.ipc_base
);
721 iounmap(ipcdev
.i2c_base
);
725 static const struct pci_device_id pci_ids
[] = {
726 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x080e)},
727 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x082a)},
730 MODULE_DEVICE_TABLE(pci
, pci_ids
);
732 static struct pci_driver ipc_driver
= {
733 .name
= "intel_scu_ipc",
736 .remove
= ipc_remove
,
740 static int __init
intel_scu_ipc_init(void)
742 platform
= mrst_identify_cpu();
745 return pci_register_driver(&ipc_driver
);
748 static void __exit
intel_scu_ipc_exit(void)
750 pci_unregister_driver(&ipc_driver
);
753 MODULE_AUTHOR("Sreedhara DS <sreedhara.ds@intel.com>");
754 MODULE_DESCRIPTION("Intel SCU IPC driver");
755 MODULE_LICENSE("GPL");
757 module_init(intel_scu_ipc_init
);
758 module_exit(intel_scu_ipc_exit
);