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-rw-r--r--arch/x86/include/asm/olpc.h19
-rw-r--r--arch/x86/platform/olpc/olpc-xo1-pm.c16
-rw-r--r--arch/x86/platform/olpc/olpc-xo1-sci.c1
-rw-r--r--arch/x86/platform/olpc/olpc-xo15-sci.c1
-rw-r--r--arch/x86/platform/olpc/olpc.c190
-rw-r--r--drivers/net/wireless/libertas/if_usb.c1
-rw-r--r--drivers/platform/Makefile1
-rw-r--r--drivers/platform/olpc/Makefile4
-rw-r--r--drivers/platform/olpc/olpc-ec.c336
-rw-r--r--drivers/platform/x86/xo1-rfkill.c3
-rw-r--r--drivers/power/olpc_battery.c1
-rw-r--r--drivers/staging/olpc_dcon/olpc_dcon.c1
-rw-r--r--include/linux/olpc-ec.h41
13 files changed, 451 insertions, 164 deletions
diff --git a/arch/x86/include/asm/olpc.h b/arch/x86/include/asm/olpc.h
index 87bdbca72f94..72f9adf6eca4 100644
--- a/arch/x86/include/asm/olpc.h
+++ b/arch/x86/include/asm/olpc.h
@@ -100,25 +100,6 @@ extern void olpc_xo1_pm_wakeup_clear(u16 value);
100 100
101extern int pci_olpc_init(void); 101extern int pci_olpc_init(void);
102 102
103/* EC related functions */
104
105extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
106 unsigned char *outbuf, size_t outlen);
107
108/* EC commands */
109
110#define EC_FIRMWARE_REV 0x08
111#define EC_WRITE_SCI_MASK 0x1b
112#define EC_WAKE_UP_WLAN 0x24
113#define EC_WLAN_LEAVE_RESET 0x25
114#define EC_READ_EB_MODE 0x2a
115#define EC_SET_SCI_INHIBIT 0x32
116#define EC_SET_SCI_INHIBIT_RELEASE 0x34
117#define EC_WLAN_ENTER_RESET 0x35
118#define EC_WRITE_EXT_SCI_MASK 0x38
119#define EC_SCI_QUERY 0x84
120#define EC_EXT_SCI_QUERY 0x85
121
122/* SCI source values */ 103/* SCI source values */
123 104
124#define EC_SCI_SRC_EMPTY 0x00 105#define EC_SCI_SRC_EMPTY 0x00
diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c b/arch/x86/platform/olpc/olpc-xo1-pm.c
index 0ce8616c88ae..d75582d1aa55 100644
--- a/arch/x86/platform/olpc/olpc-xo1-pm.c
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -18,6 +18,7 @@
18#include <linux/pm.h> 18#include <linux/pm.h>
19#include <linux/mfd/core.h> 19#include <linux/mfd/core.h>
20#include <linux/suspend.h> 20#include <linux/suspend.h>
21#include <linux/olpc-ec.h>
21 22
22#include <asm/io.h> 23#include <asm/io.h>
23#include <asm/olpc.h> 24#include <asm/olpc.h>
@@ -51,16 +52,11 @@ EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_clear);
51static int xo1_power_state_enter(suspend_state_t pm_state) 52static int xo1_power_state_enter(suspend_state_t pm_state)
52{ 53{
53 unsigned long saved_sci_mask; 54 unsigned long saved_sci_mask;
54 int r;
55 55
56 /* Only STR is supported */ 56 /* Only STR is supported */
57 if (pm_state != PM_SUSPEND_MEM) 57 if (pm_state != PM_SUSPEND_MEM)
58 return -EINVAL; 58 return -EINVAL;
59 59
60 r = olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
61 if (r)
62 return r;
63
64 /* 60 /*
65 * Save SCI mask (this gets lost since PM1_EN is used as a mask for 61 * Save SCI mask (this gets lost since PM1_EN is used as a mask for
66 * wakeup events, which is not necessarily the same event set) 62 * wakeup events, which is not necessarily the same event set)
@@ -76,16 +72,6 @@ static int xo1_power_state_enter(suspend_state_t pm_state)
76 /* Restore SCI mask (using dword access to CS5536_PM1_EN) */ 72 /* Restore SCI mask (using dword access to CS5536_PM1_EN) */
77 outl(saved_sci_mask, acpi_base + CS5536_PM1_STS); 73 outl(saved_sci_mask, acpi_base + CS5536_PM1_STS);
78 74
79 /* Tell the EC to stop inhibiting SCIs */
80 olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
81
82 /*
83 * Tell the wireless module to restart USB communication.
84 * Must be done twice.
85 */
86 olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
87 olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
88
89 return 0; 75 return 0;
90} 76}
91 77
diff --git a/arch/x86/platform/olpc/olpc-xo1-sci.c b/arch/x86/platform/olpc/olpc-xo1-sci.c
index 04b8c73659c5..63d4aa40956e 100644
--- a/arch/x86/platform/olpc/olpc-xo1-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo1-sci.c
@@ -23,6 +23,7 @@
23#include <linux/power_supply.h> 23#include <linux/power_supply.h>
24#include <linux/suspend.h> 24#include <linux/suspend.h>
25#include <linux/workqueue.h> 25#include <linux/workqueue.h>
26#include <linux/olpc-ec.h>
26 27
27#include <asm/io.h> 28#include <asm/io.h>
28#include <asm/msr.h> 29#include <asm/msr.h>
diff --git a/arch/x86/platform/olpc/olpc-xo15-sci.c b/arch/x86/platform/olpc/olpc-xo15-sci.c
index 599be499fdf7..2fdca25905ae 100644
--- a/arch/x86/platform/olpc/olpc-xo15-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo15-sci.c
@@ -13,6 +13,7 @@
13#include <linux/slab.h> 13#include <linux/slab.h>
14#include <linux/workqueue.h> 14#include <linux/workqueue.h>
15#include <linux/power_supply.h> 15#include <linux/power_supply.h>
16#include <linux/olpc-ec.h>
16 17
17#include <acpi/acpi_bus.h> 18#include <acpi/acpi_bus.h>
18#include <acpi/acpi_drivers.h> 19#include <acpi/acpi_drivers.h>
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
index a4bee53c2e54..27376081ddec 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -14,14 +14,13 @@
14#include <linux/init.h> 14#include <linux/init.h>
15#include <linux/module.h> 15#include <linux/module.h>
16#include <linux/delay.h> 16#include <linux/delay.h>
17#include <linux/spinlock.h>
18#include <linux/io.h> 17#include <linux/io.h>
19#include <linux/string.h> 18#include <linux/string.h>
20#include <linux/platform_device.h> 19#include <linux/platform_device.h>
21#include <linux/of.h> 20#include <linux/of.h>
22#include <linux/syscore_ops.h> 21#include <linux/syscore_ops.h>
23#include <linux/debugfs.h>
24#include <linux/mutex.h> 22#include <linux/mutex.h>
23#include <linux/olpc-ec.h>
25 24
26#include <asm/geode.h> 25#include <asm/geode.h>
27#include <asm/setup.h> 26#include <asm/setup.h>
@@ -31,17 +30,6 @@
31struct olpc_platform_t olpc_platform_info; 30struct olpc_platform_t olpc_platform_info;
32EXPORT_SYMBOL_GPL(olpc_platform_info); 31EXPORT_SYMBOL_GPL(olpc_platform_info);
33 32
34static DEFINE_SPINLOCK(ec_lock);
35
36/* debugfs interface to EC commands */
37#define EC_MAX_CMD_ARGS (5 + 1) /* cmd byte + 5 args */
38#define EC_MAX_CMD_REPLY (8)
39
40static struct dentry *ec_debugfs_dir;
41static DEFINE_MUTEX(ec_debugfs_cmd_lock);
42static unsigned char ec_debugfs_resp[EC_MAX_CMD_REPLY];
43static unsigned int ec_debugfs_resp_bytes;
44
45/* EC event mask to be applied during suspend (defining wakeup sources). */ 33/* EC event mask to be applied during suspend (defining wakeup sources). */
46static u16 ec_wakeup_mask; 34static u16 ec_wakeup_mask;
47 35
@@ -125,16 +113,13 @@ static int __wait_on_obf(unsigned int line, unsigned int port, int desired)
125 * <http://wiki.laptop.org/go/Ec_specification>. Unfortunately, while 113 * <http://wiki.laptop.org/go/Ec_specification>. Unfortunately, while
126 * OpenFirmware's source is available, the EC's is not. 114 * OpenFirmware's source is available, the EC's is not.
127 */ 115 */
128int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, 116static int olpc_xo1_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
129 unsigned char *outbuf, size_t outlen) 117 size_t outlen, void *arg)
130{ 118{
131 unsigned long flags;
132 int ret = -EIO; 119 int ret = -EIO;
133 int i; 120 int i;
134 int restarts = 0; 121 int restarts = 0;
135 122
136 spin_lock_irqsave(&ec_lock, flags);
137
138 /* Clear OBF */ 123 /* Clear OBF */
139 for (i = 0; i < 10 && (obf_status(0x6c) == 1); i++) 124 for (i = 0; i < 10 && (obf_status(0x6c) == 1); i++)
140 inb(0x68); 125 inb(0x68);
@@ -198,10 +183,8 @@ restart:
198 183
199 ret = 0; 184 ret = 0;
200err: 185err:
201 spin_unlock_irqrestore(&ec_lock, flags);
202 return ret; 186 return ret;
203} 187}
204EXPORT_SYMBOL_GPL(olpc_ec_cmd);
205 188
206void olpc_ec_wakeup_set(u16 value) 189void olpc_ec_wakeup_set(u16 value)
207{ 190{
@@ -280,96 +263,6 @@ int olpc_ec_sci_query(u16 *sci_value)
280} 263}
281EXPORT_SYMBOL_GPL(olpc_ec_sci_query); 264EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
282 265
283static ssize_t ec_debugfs_cmd_write(struct file *file, const char __user *buf,
284 size_t size, loff_t *ppos)
285{
286 int i, m;
287 unsigned char ec_cmd[EC_MAX_CMD_ARGS];
288 unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
289 char cmdbuf[64];
290 int ec_cmd_bytes;
291
292 mutex_lock(&ec_debugfs_cmd_lock);
293
294 size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
295
296 m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
297 &ec_debugfs_resp_bytes,
298 &ec_cmd_int[1], &ec_cmd_int[2], &ec_cmd_int[3],
299 &ec_cmd_int[4], &ec_cmd_int[5]);
300 if (m < 2 || ec_debugfs_resp_bytes > EC_MAX_CMD_REPLY) {
301 /* reset to prevent overflow on read */
302 ec_debugfs_resp_bytes = 0;
303
304 printk(KERN_DEBUG "olpc-ec: bad ec cmd: "
305 "cmd:response-count [arg1 [arg2 ...]]\n");
306 size = -EINVAL;
307 goto out;
308 }
309
310 /* convert scanf'd ints to char */
311 ec_cmd_bytes = m - 2;
312 for (i = 0; i <= ec_cmd_bytes; i++)
313 ec_cmd[i] = ec_cmd_int[i];
314
315 printk(KERN_DEBUG "olpc-ec: debugfs cmd 0x%02x with %d args "
316 "%02x %02x %02x %02x %02x, want %d returns\n",
317 ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2], ec_cmd[3],
318 ec_cmd[4], ec_cmd[5], ec_debugfs_resp_bytes);
319
320 olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
321 ec_cmd_bytes, ec_debugfs_resp, ec_debugfs_resp_bytes);
322
323 printk(KERN_DEBUG "olpc-ec: response "
324 "%02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
325 ec_debugfs_resp[0], ec_debugfs_resp[1], ec_debugfs_resp[2],
326 ec_debugfs_resp[3], ec_debugfs_resp[4], ec_debugfs_resp[5],
327 ec_debugfs_resp[6], ec_debugfs_resp[7], ec_debugfs_resp_bytes);
328
329out:
330 mutex_unlock(&ec_debugfs_cmd_lock);
331 return size;
332}
333
334static ssize_t ec_debugfs_cmd_read(struct file *file, char __user *buf,
335 size_t size, loff_t *ppos)
336{
337 unsigned int i, r;
338 char *rp;
339 char respbuf[64];
340
341 mutex_lock(&ec_debugfs_cmd_lock);
342 rp = respbuf;
343 rp += sprintf(rp, "%02x", ec_debugfs_resp[0]);
344 for (i = 1; i < ec_debugfs_resp_bytes; i++)
345 rp += sprintf(rp, ", %02x", ec_debugfs_resp[i]);
346 mutex_unlock(&ec_debugfs_cmd_lock);
347 rp += sprintf(rp, "\n");
348
349 r = rp - respbuf;
350 return simple_read_from_buffer(buf, size, ppos, respbuf, r);
351}
352
353static const struct file_operations ec_debugfs_genops = {
354 .write = ec_debugfs_cmd_write,
355 .read = ec_debugfs_cmd_read,
356};
357
358static void setup_debugfs(void)
359{
360 ec_debugfs_dir = debugfs_create_dir("olpc-ec", 0);
361 if (ec_debugfs_dir == ERR_PTR(-ENODEV))
362 return;
363
364 debugfs_create_file("cmd", 0600, ec_debugfs_dir, NULL,
365 &ec_debugfs_genops);
366}
367
368static int olpc_ec_suspend(void)
369{
370 return olpc_ec_mask_write(ec_wakeup_mask);
371}
372
373static bool __init check_ofw_architecture(struct device_node *root) 266static bool __init check_ofw_architecture(struct device_node *root)
374{ 267{
375 const char *olpc_arch; 268 const char *olpc_arch;
@@ -424,8 +317,59 @@ static int __init add_xo1_platform_devices(void)
424 return 0; 317 return 0;
425} 318}
426 319
427static struct syscore_ops olpc_syscore_ops = { 320static int olpc_xo1_ec_probe(struct platform_device *pdev)
428 .suspend = olpc_ec_suspend, 321{
322 /* get the EC revision */
323 olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
324 (unsigned char *) &olpc_platform_info.ecver, 1);
325
326 /* EC version 0x5f adds support for wide SCI mask */
327 if (olpc_platform_info.ecver >= 0x5f)
328 olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;
329
330 pr_info("OLPC board revision %s%X (EC=%x)\n",
331 ((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
332 olpc_platform_info.boardrev >> 4,
333 olpc_platform_info.ecver);
334
335 return 0;
336}
337static int olpc_xo1_ec_suspend(struct platform_device *pdev)
338{
339 olpc_ec_mask_write(ec_wakeup_mask);
340
341 /*
342 * Squelch SCIs while suspended. This is a fix for
343 * <http://dev.laptop.org/ticket/1835>.
344 */
345 return olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
346}
347
348static int olpc_xo1_ec_resume(struct platform_device *pdev)
349{
350 /* Tell the EC to stop inhibiting SCIs */
351 olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
352
353 /*
354 * Tell the wireless module to restart USB communication.
355 * Must be done twice.
356 */
357 olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
358 olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
359
360 return 0;
361}
362
363static struct olpc_ec_driver ec_xo1_driver = {
364 .probe = olpc_xo1_ec_probe,
365 .suspend = olpc_xo1_ec_suspend,
366 .resume = olpc_xo1_ec_resume,
367 .ec_cmd = olpc_xo1_ec_cmd,
368};
369
370static struct olpc_ec_driver ec_xo1_5_driver = {
371 .probe = olpc_xo1_ec_probe,
372 .ec_cmd = olpc_xo1_ec_cmd,
429}; 373};
430 374
431static int __init olpc_init(void) 375static int __init olpc_init(void)
@@ -435,16 +379,17 @@ static int __init olpc_init(void)
435 if (!olpc_ofw_present() || !platform_detect()) 379 if (!olpc_ofw_present() || !platform_detect())
436 return 0; 380 return 0;
437 381
438 spin_lock_init(&ec_lock); 382 /* register the XO-1 and 1.5-specific EC handler */
383 if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) /* XO-1 */
384 olpc_ec_driver_register(&ec_xo1_driver, NULL);
385 else
386 olpc_ec_driver_register(&ec_xo1_5_driver, NULL);
387 platform_device_register_simple("olpc-ec", -1, NULL, 0);
439 388
440 /* assume B1 and above models always have a DCON */ 389 /* assume B1 and above models always have a DCON */
441 if (olpc_board_at_least(olpc_board(0xb1))) 390 if (olpc_board_at_least(olpc_board(0xb1)))
442 olpc_platform_info.flags |= OLPC_F_DCON; 391 olpc_platform_info.flags |= OLPC_F_DCON;
443 392
444 /* get the EC revision */
445 olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
446 (unsigned char *) &olpc_platform_info.ecver, 1);
447
448#ifdef CONFIG_PCI_OLPC 393#ifdef CONFIG_PCI_OLPC
449 /* If the VSA exists let it emulate PCI, if not emulate in kernel. 394 /* If the VSA exists let it emulate PCI, if not emulate in kernel.
450 * XO-1 only. */ 395 * XO-1 only. */
@@ -452,14 +397,6 @@ static int __init olpc_init(void)
452 !cs5535_has_vsa2()) 397 !cs5535_has_vsa2())
453 x86_init.pci.arch_init = pci_olpc_init; 398 x86_init.pci.arch_init = pci_olpc_init;
454#endif 399#endif
455 /* EC version 0x5f adds support for wide SCI mask */
456 if (olpc_platform_info.ecver >= 0x5f)
457 olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;
458
459 printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
460 ((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
461 olpc_platform_info.boardrev >> 4,
462 olpc_platform_info.ecver);
463 400
464 if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */ 401 if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */
465 r = add_xo1_platform_devices(); 402 r = add_xo1_platform_devices();
@@ -467,9 +404,6 @@ static int __init olpc_init(void)
467 return r; 404 return r;
468 } 405 }
469 406
470 register_syscore_ops(&olpc_syscore_ops);
471 setup_debugfs();
472
473 return 0; 407 return 0;
474} 408}
475 409
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 55a77e41170a..27980778d992 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -10,6 +10,7 @@
10#include <linux/netdevice.h> 10#include <linux/netdevice.h>
11#include <linux/slab.h> 11#include <linux/slab.h>
12#include <linux/usb.h> 12#include <linux/usb.h>
13#include <linux/olpc-ec.h>
13 14
14#ifdef CONFIG_OLPC 15#ifdef CONFIG_OLPC
15#include <asm/olpc.h> 16#include <asm/olpc.h>
diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile
index 782953ae4c03..b17c16ce54ad 100644
--- a/drivers/platform/Makefile
+++ b/drivers/platform/Makefile
@@ -3,3 +3,4 @@
3# 3#
4 4
5obj-$(CONFIG_X86) += x86/ 5obj-$(CONFIG_X86) += x86/
6obj-$(CONFIG_OLPC) += olpc/
diff --git a/drivers/platform/olpc/Makefile b/drivers/platform/olpc/Makefile
new file mode 100644
index 000000000000..dc8b26bc7209
--- /dev/null
+++ b/drivers/platform/olpc/Makefile
@@ -0,0 +1,4 @@
1#
2# OLPC XO platform-specific drivers
3#
4obj-$(CONFIG_OLPC) += olpc-ec.o
diff --git a/drivers/platform/olpc/olpc-ec.c b/drivers/platform/olpc/olpc-ec.c
new file mode 100644
index 000000000000..0f9f8596b300
--- /dev/null
+++ b/drivers/platform/olpc/olpc-ec.c
@@ -0,0 +1,336 @@
1/*
2 * Generic driver for the OLPC Embedded Controller.
3 *
4 * Copyright (C) 2011-2012 One Laptop per Child Foundation.
5 *
6 * Licensed under the GPL v2 or later.
7 */
8#include <linux/completion.h>
9#include <linux/debugfs.h>
10#include <linux/spinlock.h>
11#include <linux/mutex.h>
12#include <linux/platform_device.h>
13#include <linux/slab.h>
14#include <linux/workqueue.h>
15#include <linux/module.h>
16#include <linux/list.h>
17#include <linux/olpc-ec.h>
18#include <asm/olpc.h>
19
20struct ec_cmd_desc {
21 u8 cmd;
22 u8 *inbuf, *outbuf;
23 size_t inlen, outlen;
24
25 int err;
26 struct completion finished;
27 struct list_head node;
28
29 void *priv;
30};
31
32struct olpc_ec_priv {
33 struct olpc_ec_driver *drv;
34 struct work_struct worker;
35 struct mutex cmd_lock;
36
37 /* Pending EC commands */
38 struct list_head cmd_q;
39 spinlock_t cmd_q_lock;
40
41 struct dentry *dbgfs_dir;
42
43 /*
44 * Running an EC command while suspending means we don't always finish
45 * the command before the machine suspends. This means that the EC
46 * is expecting the command protocol to finish, but we after a period
47 * of time (while the OS is asleep) the EC times out and restarts its
48 * idle loop. Meanwhile, the OS wakes up, thinks it's still in the
49 * middle of the command protocol, starts throwing random things at
50 * the EC... and everyone's uphappy.
51 */
52 bool suspended;
53};
54
55static struct olpc_ec_driver *ec_driver;
56static struct olpc_ec_priv *ec_priv;
57static void *ec_cb_arg;
58
59void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg)
60{
61 ec_driver = drv;
62 ec_cb_arg = arg;
63}
64EXPORT_SYMBOL_GPL(olpc_ec_driver_register);
65
66static void olpc_ec_worker(struct work_struct *w)
67{
68 struct olpc_ec_priv *ec = container_of(w, struct olpc_ec_priv, worker);
69 struct ec_cmd_desc *desc = NULL;
70 unsigned long flags;
71
72 /* Grab the first pending command from the queue */
73 spin_lock_irqsave(&ec->cmd_q_lock, flags);
74 if (!list_empty(&ec->cmd_q)) {
75 desc = list_first_entry(&ec->cmd_q, struct ec_cmd_desc, node);
76 list_del(&desc->node);
77 }
78 spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
79
80 /* Do we actually have anything to do? */
81 if (!desc)
82 return;
83
84 /* Protect the EC hw with a mutex; only run one cmd at a time */
85 mutex_lock(&ec->cmd_lock);
86 desc->err = ec_driver->ec_cmd(desc->cmd, desc->inbuf, desc->inlen,
87 desc->outbuf, desc->outlen, ec_cb_arg);
88 mutex_unlock(&ec->cmd_lock);
89
90 /* Finished, wake up olpc_ec_cmd() */
91 complete(&desc->finished);
92
93 /* Run the worker thread again in case there are more cmds pending */
94 schedule_work(&ec->worker);
95}
96
97/*
98 * Throw a cmd descripter onto the list. We now have SMP OLPC machines, so
99 * locking is pretty critical.
100 */
101static void queue_ec_descriptor(struct ec_cmd_desc *desc,
102 struct olpc_ec_priv *ec)
103{
104 unsigned long flags;
105
106 INIT_LIST_HEAD(&desc->node);
107
108 spin_lock_irqsave(&ec->cmd_q_lock, flags);
109 list_add_tail(&desc->node, &ec->cmd_q);
110 spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
111
112 schedule_work(&ec->worker);
113}
114
115int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen)
116{
117 struct olpc_ec_priv *ec = ec_priv;
118 struct ec_cmd_desc desc;
119
120 /* Ensure a driver and ec hook have been registered */
121 if (WARN_ON(!ec_driver || !ec_driver->ec_cmd))
122 return -ENODEV;
123
124 if (!ec)
125 return -ENOMEM;
126
127 /* Suspending in the middle of a command hoses things really badly */
128 if (WARN_ON(ec->suspended))
129 return -EBUSY;
130
131 might_sleep();
132
133 desc.cmd = cmd;
134 desc.inbuf = inbuf;
135 desc.outbuf = outbuf;
136 desc.inlen = inlen;
137 desc.outlen = outlen;
138 desc.err = 0;
139 init_completion(&desc.finished);
140
141 queue_ec_descriptor(&desc, ec);
142
143 /* Timeouts must be handled in the platform-specific EC hook */
144 wait_for_completion(&desc.finished);
145
146 /* The worker thread dequeues the cmd; no need to do anything here */
147 return desc.err;
148}
149EXPORT_SYMBOL_GPL(olpc_ec_cmd);
150
151#ifdef CONFIG_DEBUG_FS
152
153/*
154 * debugfs support for "generic commands", to allow sending
155 * arbitrary EC commands from userspace.
156 */
157
158#define EC_MAX_CMD_ARGS (5 + 1) /* cmd byte + 5 args */
159#define EC_MAX_CMD_REPLY (8)
160
161static DEFINE_MUTEX(ec_dbgfs_lock);
162static unsigned char ec_dbgfs_resp[EC_MAX_CMD_REPLY];
163static unsigned int ec_dbgfs_resp_bytes;
164
165static ssize_t ec_dbgfs_cmd_write(struct file *file, const char __user *buf,
166 size_t size, loff_t *ppos)
167{
168 int i, m;
169 unsigned char ec_cmd[EC_MAX_CMD_ARGS];
170 unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
171 char cmdbuf[64];
172 int ec_cmd_bytes;
173
174 mutex_lock(&ec_dbgfs_lock);
175
176 size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
177
178 m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
179 &ec_dbgfs_resp_bytes, &ec_cmd_int[1], &ec_cmd_int[2],
180 &ec_cmd_int[3], &ec_cmd_int[4], &ec_cmd_int[5]);
181 if (m < 2 || ec_dbgfs_resp_bytes > EC_MAX_CMD_REPLY) {
182 /* reset to prevent overflow on read */
183 ec_dbgfs_resp_bytes = 0;
184
185 pr_debug("olpc-ec: bad ec cmd: cmd:response-count [arg1 [arg2 ...]]\n");
186 size = -EINVAL;
187 goto out;
188 }
189
190 /* convert scanf'd ints to char */
191 ec_cmd_bytes = m - 2;
192 for (i = 0; i <= ec_cmd_bytes; i++)
193 ec_cmd[i] = ec_cmd_int[i];
194
195 pr_debug("olpc-ec: debugfs cmd 0x%02x with %d args %02x %02x %02x %02x %02x, want %d returns\n",
196 ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2],
197 ec_cmd[3], ec_cmd[4], ec_cmd[5], ec_dbgfs_resp_bytes);
198
199 olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
200 ec_cmd_bytes, ec_dbgfs_resp, ec_dbgfs_resp_bytes);
201
202 pr_debug("olpc-ec: response %02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
203 ec_dbgfs_resp[0], ec_dbgfs_resp[1], ec_dbgfs_resp[2],
204 ec_dbgfs_resp[3], ec_dbgfs_resp[4], ec_dbgfs_resp[5],
205 ec_dbgfs_resp[6], ec_dbgfs_resp[7],
206 ec_dbgfs_resp_bytes);
207
208out:
209 mutex_unlock(&ec_dbgfs_lock);
210 return size;
211}
212
213static ssize_t ec_dbgfs_cmd_read(struct file *file, char __user *buf,
214 size_t size, loff_t *ppos)
215{
216 unsigned int i, r;
217 char *rp;
218 char respbuf[64];
219
220 mutex_lock(&ec_dbgfs_lock);
221 rp = respbuf;
222 rp += sprintf(rp, "%02x", ec_dbgfs_resp[0]);
223 for (i = 1; i < ec_dbgfs_resp_bytes; i++)
224 rp += sprintf(rp, ", %02x", ec_dbgfs_resp[i]);
225 mutex_unlock(&ec_dbgfs_lock);
226 rp += sprintf(rp, "\n");
227
228 r = rp - respbuf;
229 return simple_read_from_buffer(buf, size, ppos, respbuf, r);
230}
231
232static const struct file_operations ec_dbgfs_ops = {
233 .write = ec_dbgfs_cmd_write,
234 .read = ec_dbgfs_cmd_read,
235};
236
237static struct dentry *olpc_ec_setup_debugfs(void)
238{
239 struct dentry *dbgfs_dir;
240
241 dbgfs_dir = debugfs_create_dir("olpc-ec", NULL);
242 if (IS_ERR_OR_NULL(dbgfs_dir))
243 return NULL;
244
245 debugfs_create_file("cmd", 0600, dbgfs_dir, NULL, &ec_dbgfs_ops);
246
247 return dbgfs_dir;
248}
249
250#else
251
252static struct dentry *olpc_ec_setup_debugfs(void)
253{
254 return NULL;
255}
256
257#endif /* CONFIG_DEBUG_FS */
258
259static int olpc_ec_probe(struct platform_device *pdev)
260{
261 struct olpc_ec_priv *ec;
262 int err;
263
264 if (!ec_driver)
265 return -ENODEV;
266
267 ec = kzalloc(sizeof(*ec), GFP_KERNEL);
268 if (!ec)
269 return -ENOMEM;
270
271 ec->drv = ec_driver;
272 INIT_WORK(&ec->worker, olpc_ec_worker);
273 mutex_init(&ec->cmd_lock);
274
275 INIT_LIST_HEAD(&ec->cmd_q);
276 spin_lock_init(&ec->cmd_q_lock);
277
278 ec_priv = ec;
279 platform_set_drvdata(pdev, ec);
280
281 err = ec_driver->probe ? ec_driver->probe(pdev) : 0;
282 if (err) {
283 ec_priv = NULL;
284 kfree(ec);
285 } else {
286 ec->dbgfs_dir = olpc_ec_setup_debugfs();
287 }
288
289 return err;
290}
291
292static int olpc_ec_suspend(struct device *dev)
293{
294 struct platform_device *pdev = to_platform_device(dev);
295 struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
296 int err = 0;
297
298 if (ec_driver->suspend)
299 err = ec_driver->suspend(pdev);
300 if (!err)
301 ec->suspended = true;
302
303 return err;
304}
305
306static int olpc_ec_resume(struct device *dev)
307{
308 struct platform_device *pdev = to_platform_device(dev);
309 struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
310
311 ec->suspended = false;
312 return ec_driver->resume ? ec_driver->resume(pdev) : 0;
313}
314
315static const struct dev_pm_ops olpc_ec_pm_ops = {
316 .suspend_late = olpc_ec_suspend,
317 .resume_early = olpc_ec_resume,
318};
319
320static struct platform_driver olpc_ec_plat_driver = {
321 .probe = olpc_ec_probe,
322 .driver = {
323 .name = "olpc-ec",
324 .pm = &olpc_ec_pm_ops,
325 },
326};
327
328static int __init olpc_ec_init_module(void)
329{
330 return platform_driver_register(&olpc_ec_plat_driver);
331}
332
333module_init(olpc_ec_init_module);
334
335MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
336MODULE_LICENSE("GPL");
diff --git a/drivers/platform/x86/xo1-rfkill.c b/drivers/platform/x86/xo1-rfkill.c
index b57ad8641480..1da13ed34b04 100644
--- a/drivers/platform/x86/xo1-rfkill.c
+++ b/drivers/platform/x86/xo1-rfkill.c
@@ -12,8 +12,7 @@
12#include <linux/module.h> 12#include <linux/module.h>
13#include <linux/platform_device.h> 13#include <linux/platform_device.h>
14#include <linux/rfkill.h> 14#include <linux/rfkill.h>
15 15#include <linux/olpc-ec.h>
16#include <asm/olpc.h>
17 16
18static bool card_blocked; 17static bool card_blocked;
19 18
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 55b10b813353..a89a41acf9c5 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -17,6 +17,7 @@
17#include <linux/power_supply.h> 17#include <linux/power_supply.h>
18#include <linux/jiffies.h> 18#include <linux/jiffies.h>
19#include <linux/sched.h> 19#include <linux/sched.h>
20#include <linux/olpc-ec.h>
20#include <asm/olpc.h> 21#include <asm/olpc.h>
21 22
22 23
diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 992275c0d87c..2c4bd746715a 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -27,6 +27,7 @@
27#include <linux/uaccess.h> 27#include <linux/uaccess.h>
28#include <linux/ctype.h> 28#include <linux/ctype.h>
29#include <linux/reboot.h> 29#include <linux/reboot.h>
30#include <linux/olpc-ec.h>
30#include <asm/tsc.h> 31#include <asm/tsc.h>
31#include <asm/olpc.h> 32#include <asm/olpc.h>
32 33
diff --git a/include/linux/olpc-ec.h b/include/linux/olpc-ec.h
new file mode 100644
index 000000000000..5bb6e760aa61
--- /dev/null
+++ b/include/linux/olpc-ec.h
@@ -0,0 +1,41 @@
1#ifndef _LINUX_OLPC_EC_H
2#define _LINUX_OLPC_EC_H
3
4/* XO-1 EC commands */
5#define EC_FIRMWARE_REV 0x08
6#define EC_WRITE_SCI_MASK 0x1b
7#define EC_WAKE_UP_WLAN 0x24
8#define EC_WLAN_LEAVE_RESET 0x25
9#define EC_READ_EB_MODE 0x2a
10#define EC_SET_SCI_INHIBIT 0x32
11#define EC_SET_SCI_INHIBIT_RELEASE 0x34
12#define EC_WLAN_ENTER_RESET 0x35
13#define EC_WRITE_EXT_SCI_MASK 0x38
14#define EC_SCI_QUERY 0x84
15#define EC_EXT_SCI_QUERY 0x85
16
17struct platform_device;
18
19struct olpc_ec_driver {
20 int (*probe)(struct platform_device *);
21 int (*suspend)(struct platform_device *);
22 int (*resume)(struct platform_device *);
23
24 int (*ec_cmd)(u8, u8 *, size_t, u8 *, size_t, void *);
25};
26
27#ifdef CONFIG_OLPC
28
29extern void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg);
30
31extern int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
32 size_t outlen);
33
34#else
35
36static inline int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
37 size_t outlen) { return -ENODEV; }
38
39#endif /* CONFIG_OLPC */
40
41#endif /* _LINUX_OLPC_EC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-30 20:22:52 -0500