mirror of https://gitee.com/openkylin/linux.git
remove dead code in via-pmu68k
When suspend is ever implemented for pmu68k it really should follow the generic pm_ops concept and not mirror the platform-specific /dev/pmu device with ioctls on it. Hence, this patch removes the unused code there; should the implementers need it they can look at via-pmu.c and/or the history of the file. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Berg
Linus Torvalds
parent
4088af39cc
commit
0d5e74fc7f
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@ -818,243 +818,3 @@ pmu_present(void)
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{
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return (pmu_kind != PMU_UNKNOWN);
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}
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#if 0 /* needs some work for 68K */
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/*
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* This struct is used to store config register values for
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* PCI devices which may get powered off when we sleep.
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*/
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static struct pci_save {
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u16 command;
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u16 cache_lat;
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u16 intr;
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} *pbook_pci_saves;
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static int n_pbook_pci_saves;
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static inline void
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pbook_pci_save(void)
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{
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int npci;
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struct pci_dev *pd = NULL;
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struct pci_save *ps;
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npci = 0;
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while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL)
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++npci;
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n_pbook_pci_saves = npci;
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if (npci == 0)
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return;
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ps = kmalloc(npci * sizeof(*ps), GFP_KERNEL);
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pbook_pci_saves = ps;
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if (ps == NULL)
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return;
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pd = NULL;
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while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
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pci_read_config_word(pd, PCI_COMMAND, &ps->command);
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pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
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pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
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++ps;
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--npci;
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}
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}
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static inline void
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pbook_pci_restore(void)
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{
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u16 cmd;
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struct pci_save *ps = pbook_pci_saves;
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struct pci_dev *pd = NULL;
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int j;
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while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
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if (ps->command == 0)
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continue;
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pci_read_config_word(pd, PCI_COMMAND, &cmd);
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if ((ps->command & ~cmd) == 0)
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continue;
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switch (pd->hdr_type) {
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case PCI_HEADER_TYPE_NORMAL:
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for (j = 0; j < 6; ++j)
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pci_write_config_dword(pd,
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PCI_BASE_ADDRESS_0 + j*4,
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pd->resource[j].start);
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pci_write_config_dword(pd, PCI_ROM_ADDRESS,
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pd->resource[PCI_ROM_RESOURCE].start);
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pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
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ps->cache_lat);
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pci_write_config_word(pd, PCI_INTERRUPT_LINE,
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ps->intr);
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pci_write_config_word(pd, PCI_COMMAND, ps->command);
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break;
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/* other header types not restored at present */
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}
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}
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}
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/*
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* Put the powerbook to sleep.
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*/
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#define IRQ_ENABLE ((unsigned int *)0xf3000024)
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#define MEM_CTRL ((unsigned int *)0xf8000070)
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int powerbook_sleep(void)
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{
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int ret, i, x;
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static int save_backlight;
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static unsigned int save_irqen;
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unsigned long msr;
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unsigned int hid0;
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unsigned long p, wait;
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struct adb_request sleep_req;
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/* Notify device drivers */
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ret = blocking_notifier_call_chain(&sleep_notifier_list,
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PBOOK_SLEEP, NULL);
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if (ret & NOTIFY_STOP_MASK)
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return -EBUSY;
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/* Sync the disks. */
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/* XXX It would be nice to have some way to ensure that
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* nobody is dirtying any new buffers while we wait. */
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sys_sync();
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/* Turn off the display backlight */
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save_backlight = backlight_enabled;
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if (save_backlight)
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pmu_enable_backlight(0);
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/* Give the disks a little time to actually finish writing */
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for (wait = jiffies + (HZ/4); time_before(jiffies, wait); )
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mb();
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/* Disable all interrupts except pmu */
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save_irqen = in_le32(IRQ_ENABLE);
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for (i = 0; i < 32; ++i)
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if (i != vias->intrs[0].line && (save_irqen & (1 << i)))
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disable_irq(i);
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asm volatile("mtdec %0" : : "r" (0x7fffffff));
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/* Save the state of PCI config space for some slots */
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pbook_pci_save();
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/* Set the memory controller to keep the memory refreshed
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while we're asleep */
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for (i = 0x403f; i >= 0x4000; --i) {
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out_be32(MEM_CTRL, i);
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do {
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x = (in_be32(MEM_CTRL) >> 16) & 0x3ff;
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} while (x == 0);
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if (x >= 0x100)
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break;
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}
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/* Ask the PMU to put us to sleep */
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pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
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while (!sleep_req.complete)
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mb();
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/* displacement-flush the L2 cache - necessary? */
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for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
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i = *(volatile int *)p;
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asleep = 1;
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/* Put the CPU into sleep mode */
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asm volatile("mfspr %0,1008" : "=r" (hid0) :);
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hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
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asm volatile("mtspr 1008,%0" : : "r" (hid0));
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local_save_flags(msr);
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msr |= MSR_POW | MSR_EE;
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local_irq_restore(msr);
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udelay(10);
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/* OK, we're awake again, start restoring things */
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out_be32(MEM_CTRL, 0x3f);
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pbook_pci_restore();
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/* wait for the PMU interrupt sequence to complete */
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while (asleep)
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mb();
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/* reenable interrupts */
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for (i = 0; i < 32; ++i)
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if (i != vias->intrs[0].line && (save_irqen & (1 << i)))
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enable_irq(i);
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/* Notify drivers */
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blocking_notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL);
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/* reenable ADB autopoll */
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pmu_adb_autopoll(adb_dev_map);
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/* Turn on the screen backlight, if it was on before */
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if (save_backlight)
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pmu_enable_backlight(1);
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/* Wait for the hard disk to spin up */
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return 0;
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}
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/*
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* Support for /dev/pmu device
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*/
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static int pmu_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static ssize_t pmu_read(struct file *file, char *buf,
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size_t count, loff_t *ppos)
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{
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return 0;
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}
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static ssize_t pmu_write(struct file *file, const char *buf,
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size_t count, loff_t *ppos)
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{
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return 0;
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}
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static int pmu_ioctl(struct inode * inode, struct file *filp,
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u_int cmd, u_long arg)
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{
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int error;
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__u32 value;
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switch (cmd) {
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case PMU_IOC_SLEEP:
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return -ENOSYS;
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case PMU_IOC_GET_BACKLIGHT:
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return put_user(backlight_level, (__u32 *)arg);
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case PMU_IOC_SET_BACKLIGHT:
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error = get_user(value, (__u32 *)arg);
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if (!error)
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pmu_set_brightness(value);
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return error;
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case PMU_IOC_GET_MODEL:
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return put_user(pmu_kind, (__u32 *)arg);
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}
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return -EINVAL;
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}
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static const struct file_operations pmu_device_fops = {
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.read = pmu_read,
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.write = pmu_write,
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.ioctl = pmu_ioctl,
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.open = pmu_open,
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};
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static struct miscdevice pmu_device = {
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PMU_MINOR, "pmu", &pmu_device_fops
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};
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void pmu_device_init(void)
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{
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if (!via)
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return;
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if (misc_register(&pmu_device) < 0)
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printk(KERN_ERR "via-pmu68k: cannot register misc device.\n");
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}
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#endif /* CONFIG_PMAC_PBOOK */
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