Merge branch 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc
Pull OLPC platform updates from Andres Salomon: "These move the OLPC Embedded Controller driver out of arch/x86/platform and into drivers/platform/olpc. OLPC machines are now ARM-based (which means lots of x86 and ARM changes), but are typically pretty self-contained.. so it makes more sense to go through a separate OLPC tree after getting the appropriate review/ACKs." * 'for-linus-3.6' of git://dev.laptop.org/users/dilinger/linux-olpc: x86: OLPC: move s/r-related EC cmds to EC driver Platform: OLPC: move global variables into priv struct Platform: OLPC: move debugfs support from x86 EC driver x86: OLPC: switch over to using new EC driver on x86 Platform: OLPC: add a suspended flag to the EC driver Platform: OLPC: turn EC driver into a platform_driver Platform: OLPC: allow EC cmd to be overridden, and create a workqueue to call it drivers: OLPC: update various drivers to include olpc-ec.h Platform: OLPC: add a stub to drivers/platform/ for the OLPC EC driver
This commit is contained in:
Linus Torvalds
Коммит
fc6bdb59a5
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@ -100,25 +100,6 @@ extern void olpc_xo1_pm_wakeup_clear(u16 value);
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extern int pci_olpc_init(void);
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/* EC related functions */
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extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
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unsigned char *outbuf, size_t outlen);
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/* EC commands */
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#define EC_FIRMWARE_REV 0x08
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#define EC_WRITE_SCI_MASK 0x1b
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#define EC_WAKE_UP_WLAN 0x24
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#define EC_WLAN_LEAVE_RESET 0x25
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#define EC_READ_EB_MODE 0x2a
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#define EC_SET_SCI_INHIBIT 0x32
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#define EC_SET_SCI_INHIBIT_RELEASE 0x34
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#define EC_WLAN_ENTER_RESET 0x35
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#define EC_WRITE_EXT_SCI_MASK 0x38
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#define EC_SCI_QUERY 0x84
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#define EC_EXT_SCI_QUERY 0x85
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/* SCI source values */
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#define EC_SCI_SRC_EMPTY 0x00
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@ -18,6 +18,7 @@
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#include <linux/pm.h>
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#include <linux/mfd/core.h>
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#include <linux/suspend.h>
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#include <linux/olpc-ec.h>
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#include <asm/io.h>
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#include <asm/olpc.h>
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@ -51,16 +52,11 @@ EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_clear);
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static int xo1_power_state_enter(suspend_state_t pm_state)
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{
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unsigned long saved_sci_mask;
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int r;
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/* Only STR is supported */
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if (pm_state != PM_SUSPEND_MEM)
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return -EINVAL;
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r = olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
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if (r)
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return r;
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/*
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* Save SCI mask (this gets lost since PM1_EN is used as a mask for
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* wakeup events, which is not necessarily the same event set)
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@ -76,16 +72,6 @@ static int xo1_power_state_enter(suspend_state_t pm_state)
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/* Restore SCI mask (using dword access to CS5536_PM1_EN) */
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outl(saved_sci_mask, acpi_base + CS5536_PM1_STS);
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/* Tell the EC to stop inhibiting SCIs */
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olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
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/*
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* Tell the wireless module to restart USB communication.
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* Must be done twice.
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*/
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olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
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olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
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return 0;
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}
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@ -23,6 +23,7 @@
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#include <linux/power_supply.h>
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#include <linux/suspend.h>
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#include <linux/workqueue.h>
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#include <linux/olpc-ec.h>
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#include <asm/io.h>
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#include <asm/msr.h>
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@ -13,6 +13,7 @@
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/power_supply.h>
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#include <linux/olpc-ec.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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@ -14,14 +14,13 @@
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/string.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/syscore_ops.h>
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#include <linux/debugfs.h>
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#include <linux/mutex.h>
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#include <linux/olpc-ec.h>
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#include <asm/geode.h>
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#include <asm/setup.h>
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@ -31,17 +30,6 @@
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struct olpc_platform_t olpc_platform_info;
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EXPORT_SYMBOL_GPL(olpc_platform_info);
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static DEFINE_SPINLOCK(ec_lock);
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/* debugfs interface to EC commands */
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#define EC_MAX_CMD_ARGS (5 + 1) /* cmd byte + 5 args */
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#define EC_MAX_CMD_REPLY (8)
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static struct dentry *ec_debugfs_dir;
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static DEFINE_MUTEX(ec_debugfs_cmd_lock);
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static unsigned char ec_debugfs_resp[EC_MAX_CMD_REPLY];
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static unsigned int ec_debugfs_resp_bytes;
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/* EC event mask to be applied during suspend (defining wakeup sources). */
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static u16 ec_wakeup_mask;
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@ -125,16 +113,13 @@ static int __wait_on_obf(unsigned int line, unsigned int port, int desired)
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* <http://wiki.laptop.org/go/Ec_specification>. Unfortunately, while
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* OpenFirmware's source is available, the EC's is not.
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*/
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int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
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unsigned char *outbuf, size_t outlen)
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static int olpc_xo1_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
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size_t outlen, void *arg)
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{
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unsigned long flags;
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int ret = -EIO;
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int i;
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int restarts = 0;
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spin_lock_irqsave(&ec_lock, flags);
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/* Clear OBF */
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for (i = 0; i < 10 && (obf_status(0x6c) == 1); i++)
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inb(0x68);
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@ -198,10 +183,8 @@ restart:
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ret = 0;
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err:
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spin_unlock_irqrestore(&ec_lock, flags);
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return ret;
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}
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EXPORT_SYMBOL_GPL(olpc_ec_cmd);
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void olpc_ec_wakeup_set(u16 value)
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{
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@ -280,96 +263,6 @@ int olpc_ec_sci_query(u16 *sci_value)
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}
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EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
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static ssize_t ec_debugfs_cmd_write(struct file *file, const char __user *buf,
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size_t size, loff_t *ppos)
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{
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int i, m;
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unsigned char ec_cmd[EC_MAX_CMD_ARGS];
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unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
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char cmdbuf[64];
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int ec_cmd_bytes;
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mutex_lock(&ec_debugfs_cmd_lock);
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size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
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m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
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&ec_debugfs_resp_bytes,
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&ec_cmd_int[1], &ec_cmd_int[2], &ec_cmd_int[3],
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&ec_cmd_int[4], &ec_cmd_int[5]);
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if (m < 2 || ec_debugfs_resp_bytes > EC_MAX_CMD_REPLY) {
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/* reset to prevent overflow on read */
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ec_debugfs_resp_bytes = 0;
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printk(KERN_DEBUG "olpc-ec: bad ec cmd: "
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"cmd:response-count [arg1 [arg2 ...]]\n");
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size = -EINVAL;
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goto out;
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}
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/* convert scanf'd ints to char */
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ec_cmd_bytes = m - 2;
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for (i = 0; i <= ec_cmd_bytes; i++)
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ec_cmd[i] = ec_cmd_int[i];
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printk(KERN_DEBUG "olpc-ec: debugfs cmd 0x%02x with %d args "
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"%02x %02x %02x %02x %02x, want %d returns\n",
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ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2], ec_cmd[3],
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ec_cmd[4], ec_cmd[5], ec_debugfs_resp_bytes);
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olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
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ec_cmd_bytes, ec_debugfs_resp, ec_debugfs_resp_bytes);
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printk(KERN_DEBUG "olpc-ec: response "
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"%02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
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ec_debugfs_resp[0], ec_debugfs_resp[1], ec_debugfs_resp[2],
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ec_debugfs_resp[3], ec_debugfs_resp[4], ec_debugfs_resp[5],
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ec_debugfs_resp[6], ec_debugfs_resp[7], ec_debugfs_resp_bytes);
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out:
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mutex_unlock(&ec_debugfs_cmd_lock);
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return size;
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}
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static ssize_t ec_debugfs_cmd_read(struct file *file, char __user *buf,
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size_t size, loff_t *ppos)
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{
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unsigned int i, r;
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char *rp;
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char respbuf[64];
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mutex_lock(&ec_debugfs_cmd_lock);
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rp = respbuf;
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rp += sprintf(rp, "%02x", ec_debugfs_resp[0]);
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for (i = 1; i < ec_debugfs_resp_bytes; i++)
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rp += sprintf(rp, ", %02x", ec_debugfs_resp[i]);
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mutex_unlock(&ec_debugfs_cmd_lock);
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rp += sprintf(rp, "\n");
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r = rp - respbuf;
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return simple_read_from_buffer(buf, size, ppos, respbuf, r);
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}
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static const struct file_operations ec_debugfs_genops = {
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.write = ec_debugfs_cmd_write,
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.read = ec_debugfs_cmd_read,
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};
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static void setup_debugfs(void)
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{
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ec_debugfs_dir = debugfs_create_dir("olpc-ec", 0);
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if (ec_debugfs_dir == ERR_PTR(-ENODEV))
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return;
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debugfs_create_file("cmd", 0600, ec_debugfs_dir, NULL,
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&ec_debugfs_genops);
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}
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static int olpc_ec_suspend(void)
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{
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return olpc_ec_mask_write(ec_wakeup_mask);
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}
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static bool __init check_ofw_architecture(struct device_node *root)
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{
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const char *olpc_arch;
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@ -424,8 +317,59 @@ static int __init add_xo1_platform_devices(void)
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return 0;
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}
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static struct syscore_ops olpc_syscore_ops = {
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.suspend = olpc_ec_suspend,
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static int olpc_xo1_ec_probe(struct platform_device *pdev)
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{
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/* get the EC revision */
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olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
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(unsigned char *) &olpc_platform_info.ecver, 1);
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/* EC version 0x5f adds support for wide SCI mask */
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if (olpc_platform_info.ecver >= 0x5f)
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olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;
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pr_info("OLPC board revision %s%X (EC=%x)\n",
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((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
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olpc_platform_info.boardrev >> 4,
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olpc_platform_info.ecver);
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return 0;
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}
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static int olpc_xo1_ec_suspend(struct platform_device *pdev)
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{
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olpc_ec_mask_write(ec_wakeup_mask);
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/*
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* Squelch SCIs while suspended. This is a fix for
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* <http://dev.laptop.org/ticket/1835>.
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*/
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return olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
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}
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static int olpc_xo1_ec_resume(struct platform_device *pdev)
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{
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/* Tell the EC to stop inhibiting SCIs */
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olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
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/*
|
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* Tell the wireless module to restart USB communication.
|
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* Must be done twice.
|
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*/
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olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
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olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
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return 0;
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}
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|
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static struct olpc_ec_driver ec_xo1_driver = {
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.probe = olpc_xo1_ec_probe,
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.suspend = olpc_xo1_ec_suspend,
|
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.resume = olpc_xo1_ec_resume,
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.ec_cmd = olpc_xo1_ec_cmd,
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};
|
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|
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static struct olpc_ec_driver ec_xo1_5_driver = {
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.probe = olpc_xo1_ec_probe,
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.ec_cmd = olpc_xo1_ec_cmd,
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};
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static int __init olpc_init(void)
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@ -435,16 +379,17 @@ static int __init olpc_init(void)
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if (!olpc_ofw_present() || !platform_detect())
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return 0;
|
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|
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spin_lock_init(&ec_lock);
|
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/* register the XO-1 and 1.5-specific EC handler */
|
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if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) /* XO-1 */
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olpc_ec_driver_register(&ec_xo1_driver, NULL);
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else
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olpc_ec_driver_register(&ec_xo1_5_driver, NULL);
|
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platform_device_register_simple("olpc-ec", -1, NULL, 0);
|
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|
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/* assume B1 and above models always have a DCON */
|
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if (olpc_board_at_least(olpc_board(0xb1)))
|
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olpc_platform_info.flags |= OLPC_F_DCON;
|
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|
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/* get the EC revision */
|
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olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
|
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(unsigned char *) &olpc_platform_info.ecver, 1);
|
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|
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#ifdef CONFIG_PCI_OLPC
|
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/* If the VSA exists let it emulate PCI, if not emulate in kernel.
|
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* XO-1 only. */
|
||||
|
|
@ -452,14 +397,6 @@ static int __init olpc_init(void)
|
|||
!cs5535_has_vsa2())
|
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x86_init.pci.arch_init = pci_olpc_init;
|
||||
#endif
|
||||
/* EC version 0x5f adds support for wide SCI mask */
|
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if (olpc_platform_info.ecver >= 0x5f)
|
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olpc_platform_info.flags |= OLPC_F_EC_WIDE_SCI;
|
||||
|
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printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
|
||||
((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
|
||||
olpc_platform_info.boardrev >> 4,
|
||||
olpc_platform_info.ecver);
|
||||
|
||||
if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */
|
||||
r = add_xo1_platform_devices();
|
||||
|
|
@ -467,9 +404,6 @@ static int __init olpc_init(void)
|
|||
return r;
|
||||
}
|
||||
|
||||
register_syscore_ops(&olpc_syscore_ops);
|
||||
setup_debugfs();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -10,6 +10,7 @@
|
|||
#include <linux/netdevice.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/usb.h>
|
||||
#include <linux/olpc-ec.h>
|
||||
|
||||
#ifdef CONFIG_OLPC
|
||||
#include <asm/olpc.h>
|
||||
|
|
|
|||
|
|
@ -3,3 +3,4 @@
|
|||
#
|
||||
|
||||
obj-$(CONFIG_X86) += x86/
|
||||
obj-$(CONFIG_OLPC) += olpc/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,4 @@
|
|||
#
|
||||
# OLPC XO platform-specific drivers
|
||||
#
|
||||
obj-$(CONFIG_OLPC) += olpc-ec.o
|
||||
|
|
@ -0,0 +1,336 @@
|
|||
/*
|
||||
* Generic driver for the OLPC Embedded Controller.
|
||||
*
|
||||
* Copyright (C) 2011-2012 One Laptop per Child Foundation.
|
||||
*
|
||||
* Licensed under the GPL v2 or later.
|
||||
*/
|
||||
#include <linux/completion.h>
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/olpc-ec.h>
|
||||
#include <asm/olpc.h>
|
||||
|
||||
struct ec_cmd_desc {
|
||||
u8 cmd;
|
||||
u8 *inbuf, *outbuf;
|
||||
size_t inlen, outlen;
|
||||
|
||||
int err;
|
||||
struct completion finished;
|
||||
struct list_head node;
|
||||
|
||||
void *priv;
|
||||
};
|
||||
|
||||
struct olpc_ec_priv {
|
||||
struct olpc_ec_driver *drv;
|
||||
struct work_struct worker;
|
||||
struct mutex cmd_lock;
|
||||
|
||||
/* Pending EC commands */
|
||||
struct list_head cmd_q;
|
||||
spinlock_t cmd_q_lock;
|
||||
|
||||
struct dentry *dbgfs_dir;
|
||||
|
||||
/*
|
||||
* Running an EC command while suspending means we don't always finish
|
||||
* the command before the machine suspends. This means that the EC
|
||||
* is expecting the command protocol to finish, but we after a period
|
||||
* of time (while the OS is asleep) the EC times out and restarts its
|
||||
* idle loop. Meanwhile, the OS wakes up, thinks it's still in the
|
||||
* middle of the command protocol, starts throwing random things at
|
||||
* the EC... and everyone's uphappy.
|
||||
*/
|
||||
bool suspended;
|
||||
};
|
||||
|
||||
static struct olpc_ec_driver *ec_driver;
|
||||
static struct olpc_ec_priv *ec_priv;
|
||||
static void *ec_cb_arg;
|
||||
|
||||
void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg)
|
||||
{
|
||||
ec_driver = drv;
|
||||
ec_cb_arg = arg;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(olpc_ec_driver_register);
|
||||
|
||||
static void olpc_ec_worker(struct work_struct *w)
|
||||
{
|
||||
struct olpc_ec_priv *ec = container_of(w, struct olpc_ec_priv, worker);
|
||||
struct ec_cmd_desc *desc = NULL;
|
||||
unsigned long flags;
|
||||
|
||||
/* Grab the first pending command from the queue */
|
||||
spin_lock_irqsave(&ec->cmd_q_lock, flags);
|
||||
if (!list_empty(&ec->cmd_q)) {
|
||||
desc = list_first_entry(&ec->cmd_q, struct ec_cmd_desc, node);
|
||||
list_del(&desc->node);
|
||||
}
|
||||
spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
|
||||
|
||||
/* Do we actually have anything to do? */
|
||||
if (!desc)
|
||||
return;
|
||||
|
||||
/* Protect the EC hw with a mutex; only run one cmd at a time */
|
||||
mutex_lock(&ec->cmd_lock);
|
||||
desc->err = ec_driver->ec_cmd(desc->cmd, desc->inbuf, desc->inlen,
|
||||
desc->outbuf, desc->outlen, ec_cb_arg);
|
||||
mutex_unlock(&ec->cmd_lock);
|
||||
|
||||
/* Finished, wake up olpc_ec_cmd() */
|
||||
complete(&desc->finished);
|
||||
|
||||
/* Run the worker thread again in case there are more cmds pending */
|
||||
schedule_work(&ec->worker);
|
||||
}
|
||||
|
||||
/*
|
||||
* Throw a cmd descripter onto the list. We now have SMP OLPC machines, so
|
||||
* locking is pretty critical.
|
||||
*/
|
||||
static void queue_ec_descriptor(struct ec_cmd_desc *desc,
|
||||
struct olpc_ec_priv *ec)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
INIT_LIST_HEAD(&desc->node);
|
||||
|
||||
spin_lock_irqsave(&ec->cmd_q_lock, flags);
|
||||
list_add_tail(&desc->node, &ec->cmd_q);
|
||||
spin_unlock_irqrestore(&ec->cmd_q_lock, flags);
|
||||
|
||||
schedule_work(&ec->worker);
|
||||
}
|
||||
|
||||
int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen)
|
||||
{
|
||||
struct olpc_ec_priv *ec = ec_priv;
|
||||
struct ec_cmd_desc desc;
|
||||
|
||||
/* Ensure a driver and ec hook have been registered */
|
||||
if (WARN_ON(!ec_driver || !ec_driver->ec_cmd))
|
||||
return -ENODEV;
|
||||
|
||||
if (!ec)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Suspending in the middle of a command hoses things really badly */
|
||||
if (WARN_ON(ec->suspended))
|
||||
return -EBUSY;
|
||||
|
||||
might_sleep();
|
||||
|
||||
desc.cmd = cmd;
|
||||
desc.inbuf = inbuf;
|
||||
desc.outbuf = outbuf;
|
||||
desc.inlen = inlen;
|
||||
desc.outlen = outlen;
|
||||
desc.err = 0;
|
||||
init_completion(&desc.finished);
|
||||
|
||||
queue_ec_descriptor(&desc, ec);
|
||||
|
||||
/* Timeouts must be handled in the platform-specific EC hook */
|
||||
wait_for_completion(&desc.finished);
|
||||
|
||||
/* The worker thread dequeues the cmd; no need to do anything here */
|
||||
return desc.err;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(olpc_ec_cmd);
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
|
||||
/*
|
||||
* debugfs support for "generic commands", to allow sending
|
||||
* arbitrary EC commands from userspace.
|
||||
*/
|
||||
|
||||
#define EC_MAX_CMD_ARGS (5 + 1) /* cmd byte + 5 args */
|
||||
#define EC_MAX_CMD_REPLY (8)
|
||||
|
||||
static DEFINE_MUTEX(ec_dbgfs_lock);
|
||||
static unsigned char ec_dbgfs_resp[EC_MAX_CMD_REPLY];
|
||||
static unsigned int ec_dbgfs_resp_bytes;
|
||||
|
||||
static ssize_t ec_dbgfs_cmd_write(struct file *file, const char __user *buf,
|
||||
size_t size, loff_t *ppos)
|
||||
{
|
||||
int i, m;
|
||||
unsigned char ec_cmd[EC_MAX_CMD_ARGS];
|
||||
unsigned int ec_cmd_int[EC_MAX_CMD_ARGS];
|
||||
char cmdbuf[64];
|
||||
int ec_cmd_bytes;
|
||||
|
||||
mutex_lock(&ec_dbgfs_lock);
|
||||
|
||||
size = simple_write_to_buffer(cmdbuf, sizeof(cmdbuf), ppos, buf, size);
|
||||
|
||||
m = sscanf(cmdbuf, "%x:%u %x %x %x %x %x", &ec_cmd_int[0],
|
||||
&ec_dbgfs_resp_bytes, &ec_cmd_int[1], &ec_cmd_int[2],
|
||||
&ec_cmd_int[3], &ec_cmd_int[4], &ec_cmd_int[5]);
|
||||
if (m < 2 || ec_dbgfs_resp_bytes > EC_MAX_CMD_REPLY) {
|
||||
/* reset to prevent overflow on read */
|
||||
ec_dbgfs_resp_bytes = 0;
|
||||
|
||||
pr_debug("olpc-ec: bad ec cmd: cmd:response-count [arg1 [arg2 ...]]\n");
|
||||
size = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* convert scanf'd ints to char */
|
||||
ec_cmd_bytes = m - 2;
|
||||
for (i = 0; i <= ec_cmd_bytes; i++)
|
||||
ec_cmd[i] = ec_cmd_int[i];
|
||||
|
||||
pr_debug("olpc-ec: debugfs cmd 0x%02x with %d args %02x %02x %02x %02x %02x, want %d returns\n",
|
||||
ec_cmd[0], ec_cmd_bytes, ec_cmd[1], ec_cmd[2],
|
||||
ec_cmd[3], ec_cmd[4], ec_cmd[5], ec_dbgfs_resp_bytes);
|
||||
|
||||
olpc_ec_cmd(ec_cmd[0], (ec_cmd_bytes == 0) ? NULL : &ec_cmd[1],
|
||||
ec_cmd_bytes, ec_dbgfs_resp, ec_dbgfs_resp_bytes);
|
||||
|
||||
pr_debug("olpc-ec: response %02x %02x %02x %02x %02x %02x %02x %02x (%d bytes expected)\n",
|
||||
ec_dbgfs_resp[0], ec_dbgfs_resp[1], ec_dbgfs_resp[2],
|
||||
ec_dbgfs_resp[3], ec_dbgfs_resp[4], ec_dbgfs_resp[5],
|
||||
ec_dbgfs_resp[6], ec_dbgfs_resp[7],
|
||||
ec_dbgfs_resp_bytes);
|
||||
|
||||
out:
|
||||
mutex_unlock(&ec_dbgfs_lock);
|
||||
return size;
|
||||
}
|
||||
|
||||
static ssize_t ec_dbgfs_cmd_read(struct file *file, char __user *buf,
|
||||
size_t size, loff_t *ppos)
|
||||
{
|
||||
unsigned int i, r;
|
||||
char *rp;
|
||||
char respbuf[64];
|
||||
|
||||
mutex_lock(&ec_dbgfs_lock);
|
||||
rp = respbuf;
|
||||
rp += sprintf(rp, "%02x", ec_dbgfs_resp[0]);
|
||||
for (i = 1; i < ec_dbgfs_resp_bytes; i++)
|
||||
rp += sprintf(rp, ", %02x", ec_dbgfs_resp[i]);
|
||||
mutex_unlock(&ec_dbgfs_lock);
|
||||
rp += sprintf(rp, "\n");
|
||||
|
||||
r = rp - respbuf;
|
||||
return simple_read_from_buffer(buf, size, ppos, respbuf, r);
|
||||
}
|
||||
|
||||
static const struct file_operations ec_dbgfs_ops = {
|
||||
.write = ec_dbgfs_cmd_write,
|
||||
.read = ec_dbgfs_cmd_read,
|
||||
};
|
||||
|
||||
static struct dentry *olpc_ec_setup_debugfs(void)
|
||||
{
|
||||
struct dentry *dbgfs_dir;
|
||||
|
||||
dbgfs_dir = debugfs_create_dir("olpc-ec", NULL);
|
||||
if (IS_ERR_OR_NULL(dbgfs_dir))
|
||||
return NULL;
|
||||
|
||||
debugfs_create_file("cmd", 0600, dbgfs_dir, NULL, &ec_dbgfs_ops);
|
||||
|
||||
return dbgfs_dir;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static struct dentry *olpc_ec_setup_debugfs(void)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_DEBUG_FS */
|
||||
|
||||
static int olpc_ec_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct olpc_ec_priv *ec;
|
||||
int err;
|
||||
|
||||
if (!ec_driver)
|
||||
return -ENODEV;
|
||||
|
||||
ec = kzalloc(sizeof(*ec), GFP_KERNEL);
|
||||
if (!ec)
|
||||
return -ENOMEM;
|
||||
|
||||
ec->drv = ec_driver;
|
||||
INIT_WORK(&ec->worker, olpc_ec_worker);
|
||||
mutex_init(&ec->cmd_lock);
|
||||
|
||||
INIT_LIST_HEAD(&ec->cmd_q);
|
||||
spin_lock_init(&ec->cmd_q_lock);
|
||||
|
||||
ec_priv = ec;
|
||||
platform_set_drvdata(pdev, ec);
|
||||
|
||||
err = ec_driver->probe ? ec_driver->probe(pdev) : 0;
|
||||
if (err) {
|
||||
ec_priv = NULL;
|
||||
kfree(ec);
|
||||
} else {
|
||||
ec->dbgfs_dir = olpc_ec_setup_debugfs();
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int olpc_ec_suspend(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
|
||||
int err = 0;
|
||||
|
||||
if (ec_driver->suspend)
|
||||
err = ec_driver->suspend(pdev);
|
||||
if (!err)
|
||||
ec->suspended = true;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int olpc_ec_resume(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct olpc_ec_priv *ec = platform_get_drvdata(pdev);
|
||||
|
||||
ec->suspended = false;
|
||||
return ec_driver->resume ? ec_driver->resume(pdev) : 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops olpc_ec_pm_ops = {
|
||||
.suspend_late = olpc_ec_suspend,
|
||||
.resume_early = olpc_ec_resume,
|
||||
};
|
||||
|
||||
static struct platform_driver olpc_ec_plat_driver = {
|
||||
.probe = olpc_ec_probe,
|
||||
.driver = {
|
||||
.name = "olpc-ec",
|
||||
.pm = &olpc_ec_pm_ops,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init olpc_ec_init_module(void)
|
||||
{
|
||||
return platform_driver_register(&olpc_ec_plat_driver);
|
||||
}
|
||||
|
||||
module_init(olpc_ec_init_module);
|
||||
|
||||
MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -12,8 +12,7 @@
|
|||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/rfkill.h>
|
||||
|
||||
#include <asm/olpc.h>
|
||||
#include <linux/olpc-ec.h>
|
||||
|
||||
static bool card_blocked;
|
||||
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@
|
|||
#include <linux/power_supply.h>
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/olpc-ec.h>
|
||||
#include <asm/olpc.h>
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -27,6 +27,7 @@
|
|||
#include <linux/uaccess.h>
|
||||
#include <linux/ctype.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/olpc-ec.h>
|
||||
#include <asm/tsc.h>
|
||||
#include <asm/olpc.h>
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,41 @@
|
|||
#ifndef _LINUX_OLPC_EC_H
|
||||
#define _LINUX_OLPC_EC_H
|
||||
|
||||
/* XO-1 EC commands */
|
||||
#define EC_FIRMWARE_REV 0x08
|
||||
#define EC_WRITE_SCI_MASK 0x1b
|
||||
#define EC_WAKE_UP_WLAN 0x24
|
||||
#define EC_WLAN_LEAVE_RESET 0x25
|
||||
#define EC_READ_EB_MODE 0x2a
|
||||
#define EC_SET_SCI_INHIBIT 0x32
|
||||
#define EC_SET_SCI_INHIBIT_RELEASE 0x34
|
||||
#define EC_WLAN_ENTER_RESET 0x35
|
||||
#define EC_WRITE_EXT_SCI_MASK 0x38
|
||||
#define EC_SCI_QUERY 0x84
|
||||
#define EC_EXT_SCI_QUERY 0x85
|
||||
|
||||
struct platform_device;
|
||||
|
||||
struct olpc_ec_driver {
|
||||
int (*probe)(struct platform_device *);
|
||||
int (*suspend)(struct platform_device *);
|
||||
int (*resume)(struct platform_device *);
|
||||
|
||||
int (*ec_cmd)(u8, u8 *, size_t, u8 *, size_t, void *);
|
||||
};
|
||||
|
||||
#ifdef CONFIG_OLPC
|
||||
|
||||
extern void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg);
|
||||
|
||||
extern int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
|
||||
size_t outlen);
|
||||
|
||||
#else
|
||||
|
||||
static inline int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf,
|
||||
size_t outlen) { return -ENODEV; }
|
||||
|
||||
#endif /* CONFIG_OLPC */
|
||||
|
||||
#endif /* _LINUX_OLPC_EC_H */
|
||||
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