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path: root/drivers/video/fbdev/via/via-core.c
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Diffstat (limited to 'drivers/video/fbdev/via/via-core.c')
-rw-r--r--drivers/video/fbdev/via/via-core.c790
1 files changed, 790 insertions, 0 deletions
diff --git a/drivers/video/fbdev/via/via-core.c b/drivers/video/fbdev/via/via-core.c
new file mode 100644
index 000000000000..6e274825fb31
--- /dev/null
+++ b/drivers/video/fbdev/via/via-core.c
@@ -0,0 +1,790 @@
+/*
+ * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
+ */
+
+/*
+ * Core code for the Via multifunction framebuffer device.
+ */
+#include <linux/via-core.h>
+#include <linux/via_i2c.h>
+#include <linux/via-gpio.h>
+#include "global.h"
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/pm.h>
+#include <asm/olpc.h>
+
+/*
+ * The default port config.
+ */
+static struct via_port_cfg adap_configs[] = {
+ [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
+ [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
+ [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
+ [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
+ [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
+ { 0, 0, 0, 0 }
+};
+
+/*
+ * The OLPC XO-1.5 puts the camera power and reset lines onto
+ * GPIO 2C.
+ */
+static struct via_port_cfg olpc_adap_configs[] = {
+ [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
+ [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
+ [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
+ [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c },
+ [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
+ { 0, 0, 0, 0 }
+};
+
+/*
+ * We currently only support one viafb device (will there ever be
+ * more than one?), so just declare it globally here.
+ */
+static struct viafb_dev global_dev;
+
+
+/*
+ * Basic register access; spinlock required.
+ */
+static inline void viafb_mmio_write(int reg, u32 v)
+{
+ iowrite32(v, global_dev.engine_mmio + reg);
+}
+
+static inline int viafb_mmio_read(int reg)
+{
+ return ioread32(global_dev.engine_mmio + reg);
+}
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Interrupt management. We have a single IRQ line for a lot of
+ * different functions, so we need to share it. The design here
+ * is that we don't want to reimplement the shared IRQ code here;
+ * we also want to avoid having contention for a single handler thread.
+ * So each subdev driver which needs interrupts just requests
+ * them directly from the kernel. We just have what's needed for
+ * overall access to the interrupt control register.
+ */
+
+/*
+ * Which interrupts are enabled now?
+ */
+static u32 viafb_enabled_ints;
+
+static void viafb_int_init(void)
+{
+ viafb_enabled_ints = 0;
+
+ viafb_mmio_write(VDE_INTERRUPT, 0);
+}
+
+/*
+ * Allow subdevs to ask for specific interrupts to be enabled. These
+ * functions must be called with reg_lock held
+ */
+void viafb_irq_enable(u32 mask)
+{
+ viafb_enabled_ints |= mask;
+ viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
+}
+EXPORT_SYMBOL_GPL(viafb_irq_enable);
+
+void viafb_irq_disable(u32 mask)
+{
+ viafb_enabled_ints &= ~mask;
+ if (viafb_enabled_ints == 0)
+ viafb_mmio_write(VDE_INTERRUPT, 0); /* Disable entirely */
+ else
+ viafb_mmio_write(VDE_INTERRUPT,
+ viafb_enabled_ints | VDE_I_ENABLE);
+}
+EXPORT_SYMBOL_GPL(viafb_irq_disable);
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Currently, the camera driver is the only user of the DMA code, so we
+ * only compile it in if the camera driver is being built. Chances are,
+ * most viafb systems will not need to have this extra code for a while.
+ * As soon as another user comes long, the ifdef can be removed.
+ */
+#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
+/*
+ * Access to the DMA engine. This currently provides what the camera
+ * driver needs (i.e. outgoing only) but is easily expandable if need
+ * be.
+ */
+
+/*
+ * There are four DMA channels in the vx855. For now, we only
+ * use one of them, though. Most of the time, the DMA channel
+ * will be idle, so we keep the IRQ handler unregistered except
+ * when some subsystem has indicated an interest.
+ */
+static int viafb_dma_users;
+static DECLARE_COMPLETION(viafb_dma_completion);
+/*
+ * This mutex protects viafb_dma_users and our global interrupt
+ * registration state; it also serializes access to the DMA
+ * engine.
+ */
+static DEFINE_MUTEX(viafb_dma_lock);
+
+/*
+ * The VX855 DMA descriptor (used for s/g transfers) looks
+ * like this.
+ */
+struct viafb_vx855_dma_descr {
+ u32 addr_low; /* Low part of phys addr */
+ u32 addr_high; /* High 12 bits of addr */
+ u32 fb_offset; /* Offset into FB memory */
+ u32 seg_size; /* Size, 16-byte units */
+ u32 tile_mode; /* "tile mode" setting */
+ u32 next_desc_low; /* Next descriptor addr */
+ u32 next_desc_high;
+ u32 pad; /* Fill out to 64 bytes */
+};
+
+/*
+ * Flags added to the "next descriptor low" pointers
+ */
+#define VIAFB_DMA_MAGIC 0x01 /* ??? Just has to be there */
+#define VIAFB_DMA_FINAL_SEGMENT 0x02 /* Final segment */
+
+/*
+ * The completion IRQ handler.
+ */
+static irqreturn_t viafb_dma_irq(int irq, void *data)
+{
+ int csr;
+ irqreturn_t ret = IRQ_NONE;
+
+ spin_lock(&global_dev.reg_lock);
+ csr = viafb_mmio_read(VDMA_CSR0);
+ if (csr & VDMA_C_DONE) {
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
+ complete(&viafb_dma_completion);
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock(&global_dev.reg_lock);
+ return ret;
+}
+
+/*
+ * Indicate a need for DMA functionality.
+ */
+int viafb_request_dma(void)
+{
+ int ret = 0;
+
+ /*
+ * Only VX855 is supported currently.
+ */
+ if (global_dev.chip_type != UNICHROME_VX855)
+ return -ENODEV;
+ /*
+ * Note the new user and set up our interrupt handler
+ * if need be.
+ */
+ mutex_lock(&viafb_dma_lock);
+ viafb_dma_users++;
+ if (viafb_dma_users == 1) {
+ ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
+ IRQF_SHARED, "via-dma", &viafb_dma_users);
+ if (ret)
+ viafb_dma_users--;
+ else
+ viafb_irq_enable(VDE_I_DMA0TDEN);
+ }
+ mutex_unlock(&viafb_dma_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(viafb_request_dma);
+
+void viafb_release_dma(void)
+{
+ mutex_lock(&viafb_dma_lock);
+ viafb_dma_users--;
+ if (viafb_dma_users == 0) {
+ viafb_irq_disable(VDE_I_DMA0TDEN);
+ free_irq(global_dev.pdev->irq, &viafb_dma_users);
+ }
+ mutex_unlock(&viafb_dma_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_release_dma);
+
+
+#if 0
+/*
+ * Copy a single buffer from FB memory, synchronously. This code works
+ * but is not currently used.
+ */
+void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
+{
+ unsigned long flags;
+ int csr;
+
+ mutex_lock(&viafb_dma_lock);
+ init_completion(&viafb_dma_completion);
+ /*
+ * Program the controller.
+ */
+ spin_lock_irqsave(&global_dev.reg_lock, flags);
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
+ /* Enable ints; must happen after CSR0 write! */
+ viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
+ viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
+ viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
+ /* Data sheet suggests DAR0 should be <<4, but it lies */
+ viafb_mmio_write(VDMA_DAR0, offset);
+ viafb_mmio_write(VDMA_DQWCR0, len >> 4);
+ viafb_mmio_write(VDMA_TMR0, 0);
+ viafb_mmio_write(VDMA_DPRL0, 0);
+ viafb_mmio_write(VDMA_DPRH0, 0);
+ viafb_mmio_write(VDMA_PMR0, 0);
+ csr = viafb_mmio_read(VDMA_CSR0);
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
+ spin_unlock_irqrestore(&global_dev.reg_lock, flags);
+ /*
+ * Now we just wait until the interrupt handler says
+ * we're done.
+ */
+ wait_for_completion_interruptible(&viafb_dma_completion);
+ viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
+ mutex_unlock(&viafb_dma_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
+#endif
+
+/*
+ * Do a scatter/gather DMA copy from FB memory. You must have done
+ * a successful call to viafb_request_dma() first.
+ */
+int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
+{
+ struct viafb_vx855_dma_descr *descr;
+ void *descrpages;
+ dma_addr_t descr_handle;
+ unsigned long flags;
+ int i;
+ struct scatterlist *sgentry;
+ dma_addr_t nextdesc;
+
+ /*
+ * Get a place to put the descriptors.
+ */
+ descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
+ nsg*sizeof(struct viafb_vx855_dma_descr),
+ &descr_handle, GFP_KERNEL);
+ if (descrpages == NULL) {
+ dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
+ return -ENOMEM;
+ }
+ mutex_lock(&viafb_dma_lock);
+ /*
+ * Fill them in.
+ */
+ descr = descrpages;
+ nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
+ for_each_sg(sg, sgentry, nsg, i) {
+ dma_addr_t paddr = sg_dma_address(sgentry);
+ descr->addr_low = paddr & 0xfffffff0;
+ descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
+ descr->fb_offset = offset;
+ descr->seg_size = sg_dma_len(sgentry) >> 4;
+ descr->tile_mode = 0;
+ descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
+ descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
+ descr->pad = 0xffffffff; /* VIA driver does this */
+ offset += sg_dma_len(sgentry);
+ nextdesc += sizeof(struct viafb_vx855_dma_descr);
+ descr++;
+ }
+ descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
+ /*
+ * Program the engine.
+ */
+ spin_lock_irqsave(&global_dev.reg_lock, flags);
+ init_completion(&viafb_dma_completion);
+ viafb_mmio_write(VDMA_DQWCR0, 0);
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
+ viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
+ viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
+ viafb_mmio_write(VDMA_DPRH0,
+ (((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
+ (void) viafb_mmio_read(VDMA_CSR0);
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
+ spin_unlock_irqrestore(&global_dev.reg_lock, flags);
+ /*
+ * Now we just wait until the interrupt handler says
+ * we're done. Except that, actually, we need to wait a little
+ * longer: the interrupts seem to jump the gun a little and we
+ * get corrupted frames sometimes.
+ */
+ wait_for_completion_timeout(&viafb_dma_completion, 1);
+ msleep(1);
+ if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
+ printk(KERN_ERR "VIA DMA timeout!\n");
+ /*
+ * Clean up and we're done.
+ */
+ viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
+ viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
+ mutex_unlock(&viafb_dma_lock);
+ dma_free_coherent(&global_dev.pdev->dev,
+ nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
+ descr_handle);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
+#endif /* CONFIG_VIDEO_VIA_CAMERA */
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Figure out how big our framebuffer memory is. Kind of ugly,
+ * but evidently we can't trust the information found in the
+ * fbdev configuration area.
+ */
+static u16 via_function3[] = {
+ CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
+ CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
+ P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3, VX900_FUNCTION3,
+};
+
+/* Get the BIOS-configured framebuffer size from PCI configuration space
+ * of function 3 in the respective chipset */
+static int viafb_get_fb_size_from_pci(int chip_type)
+{
+ int i;
+ u8 offset = 0;
+ u32 FBSize;
+ u32 VideoMemSize;
+
+ /* search for the "FUNCTION3" device in this chipset */
+ for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
+ struct pci_dev *pdev;
+
+ pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
+ NULL);
+ if (!pdev)
+ continue;
+
+ DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
+
+ switch (pdev->device) {
+ case CLE266_FUNCTION3:
+ case KM400_FUNCTION3:
+ offset = 0xE0;
+ break;
+ case CN400_FUNCTION3:
+ case CN700_FUNCTION3:
+ case CX700_FUNCTION3:
+ case KM800_FUNCTION3:
+ case KM890_FUNCTION3:
+ case P4M890_FUNCTION3:
+ case P4M900_FUNCTION3:
+ case VX800_FUNCTION3:
+ case VX855_FUNCTION3:
+ case VX900_FUNCTION3:
+ /*case CN750_FUNCTION3: */
+ offset = 0xA0;
+ break;
+ }
+
+ if (!offset)
+ break;
+
+ pci_read_config_dword(pdev, offset, &FBSize);
+ pci_dev_put(pdev);
+ }
+
+ if (!offset) {
+ printk(KERN_ERR "cannot determine framebuffer size\n");
+ return -EIO;
+ }
+
+ FBSize = FBSize & 0x00007000;
+ DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
+
+ if (chip_type < UNICHROME_CX700) {
+ switch (FBSize) {
+ case 0x00004000:
+ VideoMemSize = (16 << 20); /*16M */
+ break;
+
+ case 0x00005000:
+ VideoMemSize = (32 << 20); /*32M */
+ break;
+
+ case 0x00006000:
+ VideoMemSize = (64 << 20); /*64M */
+ break;
+
+ default:
+ VideoMemSize = (32 << 20); /*32M */
+ break;
+ }
+ } else {
+ switch (FBSize) {
+ case 0x00001000:
+ VideoMemSize = (8 << 20); /*8M */
+ break;
+
+ case 0x00002000:
+ VideoMemSize = (16 << 20); /*16M */
+ break;
+
+ case 0x00003000:
+ VideoMemSize = (32 << 20); /*32M */
+ break;
+
+ case 0x00004000:
+ VideoMemSize = (64 << 20); /*64M */
+ break;
+
+ case 0x00005000:
+ VideoMemSize = (128 << 20); /*128M */
+ break;
+
+ case 0x00006000:
+ VideoMemSize = (256 << 20); /*256M */
+ break;
+
+ case 0x00007000: /* Only on VX855/875 */
+ VideoMemSize = (512 << 20); /*512M */
+ break;
+
+ default:
+ VideoMemSize = (32 << 20); /*32M */
+ break;
+ }
+ }
+
+ return VideoMemSize;
+}
+
+
+/*
+ * Figure out and map our MMIO regions.
+ */
+static int via_pci_setup_mmio(struct viafb_dev *vdev)
+{
+ int ret;
+ /*
+ * Hook up to the device registers. Note that we soldier
+ * on if it fails; the framebuffer can operate (without
+ * acceleration) without this region.
+ */
+ vdev->engine_start = pci_resource_start(vdev->pdev, 1);
+ vdev->engine_len = pci_resource_len(vdev->pdev, 1);
+ vdev->engine_mmio = ioremap_nocache(vdev->engine_start,
+ vdev->engine_len);
+ if (vdev->engine_mmio == NULL)
+ dev_err(&vdev->pdev->dev,
+ "Unable to map engine MMIO; operation will be "
+ "slow and crippled.\n");
+ /*
+ * Map in framebuffer memory. For now, failure here is
+ * fatal. Unfortunately, in the absence of significant
+ * vmalloc space, failure here is also entirely plausible.
+ * Eventually we want to move away from mapping this
+ * entire region.
+ */
+ if (vdev->chip_type == UNICHROME_VX900)
+ vdev->fbmem_start = pci_resource_start(vdev->pdev, 2);
+ else
+ vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
+ ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
+ if (ret < 0)
+ goto out_unmap;
+
+ /* try to map less memory on failure, 8 MB should be still enough */
+ for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
+ vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
+ if (vdev->fbmem)
+ break;
+ }
+
+ if (vdev->fbmem == NULL) {
+ ret = -ENOMEM;
+ goto out_unmap;
+ }
+ return 0;
+out_unmap:
+ iounmap(vdev->engine_mmio);
+ return ret;
+}
+
+static void via_pci_teardown_mmio(struct viafb_dev *vdev)
+{
+ iounmap(vdev->fbmem);
+ iounmap(vdev->engine_mmio);
+}
+
+/*
+ * Create our subsidiary devices.
+ */
+static struct viafb_subdev_info {
+ char *name;
+ struct platform_device *platdev;
+} viafb_subdevs[] = {
+ {
+ .name = "viafb-gpio",
+ },
+ {
+ .name = "viafb-i2c",
+ },
+#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
+ {
+ .name = "viafb-camera",
+ },
+#endif
+};
+#define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
+
+static int via_create_subdev(struct viafb_dev *vdev,
+ struct viafb_subdev_info *info)
+{
+ int ret;
+
+ info->platdev = platform_device_alloc(info->name, -1);
+ if (!info->platdev) {
+ dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
+ info->name);
+ return -ENOMEM;
+ }
+ info->platdev->dev.parent = &vdev->pdev->dev;
+ info->platdev->dev.platform_data = vdev;
+ ret = platform_device_add(info->platdev);
+ if (ret) {
+ dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
+ info->name);
+ platform_device_put(info->platdev);
+ info->platdev = NULL;
+ }
+ return ret;
+}
+
+static int via_setup_subdevs(struct viafb_dev *vdev)
+{
+ int i;
+
+ /*
+ * Ignore return values. Even if some of the devices
+ * fail to be created, we'll still be able to use some
+ * of the rest.
+ */
+ for (i = 0; i < N_SUBDEVS; i++)
+ via_create_subdev(vdev, viafb_subdevs + i);
+ return 0;
+}
+
+static void via_teardown_subdevs(void)
+{
+ int i;
+
+ for (i = 0; i < N_SUBDEVS; i++)
+ if (viafb_subdevs[i].platdev) {
+ viafb_subdevs[i].platdev->dev.platform_data = NULL;
+ platform_device_unregister(viafb_subdevs[i].platdev);
+ }
+}
+
+/*
+ * Power management functions
+ */
+#ifdef CONFIG_PM
+static LIST_HEAD(viafb_pm_hooks);
+static DEFINE_MUTEX(viafb_pm_hooks_lock);
+
+void viafb_pm_register(struct viafb_pm_hooks *hooks)
+{
+ INIT_LIST_HEAD(&hooks->list);
+
+ mutex_lock(&viafb_pm_hooks_lock);
+ list_add_tail(&hooks->list, &viafb_pm_hooks);
+ mutex_unlock(&viafb_pm_hooks_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_pm_register);
+
+void viafb_pm_unregister(struct viafb_pm_hooks *hooks)
+{
+ mutex_lock(&viafb_pm_hooks_lock);
+ list_del(&hooks->list);
+ mutex_unlock(&viafb_pm_hooks_lock);
+}
+EXPORT_SYMBOL_GPL(viafb_pm_unregister);
+
+static int via_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct viafb_pm_hooks *hooks;
+
+ if (state.event != PM_EVENT_SUSPEND)
+ return 0;
+ /*
+ * "I've occasionally hit a few drivers that caused suspend
+ * failures, and each and every time it was a driver bug, and
+ * the right thing to do was to just ignore the error and suspend
+ * anyway - returning an error code and trying to undo the suspend
+ * is not what anybody ever really wants, even if our model
+ *_allows_ for it."
+ * -- Linus Torvalds, Dec. 7, 2009
+ */
+ mutex_lock(&viafb_pm_hooks_lock);
+ list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list)
+ hooks->suspend(hooks->private);
+ mutex_unlock(&viafb_pm_hooks_lock);
+
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ return 0;
+}
+
+static int via_resume(struct pci_dev *pdev)
+{
+ struct viafb_pm_hooks *hooks;
+
+ /* Get the bus side powered up */
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+ if (pci_enable_device(pdev))
+ return 0;
+
+ pci_set_master(pdev);
+
+ /* Now bring back any subdevs */
+ mutex_lock(&viafb_pm_hooks_lock);
+ list_for_each_entry(hooks, &viafb_pm_hooks, list)
+ hooks->resume(hooks->private);
+ mutex_unlock(&viafb_pm_hooks_lock);
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static int via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int ret;
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ /*
+ * Global device initialization.
+ */
+ memset(&global_dev, 0, sizeof(global_dev));
+ global_dev.pdev = pdev;
+ global_dev.chip_type = ent->driver_data;
+ global_dev.port_cfg = adap_configs;
+ if (machine_is_olpc())
+ global_dev.port_cfg = olpc_adap_configs;
+
+ spin_lock_init(&global_dev.reg_lock);
+ ret = via_pci_setup_mmio(&global_dev);
+ if (ret)
+ goto out_disable;
+ /*
+ * Set up interrupts and create our subdevices. Continue even if
+ * some things fail.
+ */
+ viafb_int_init();
+ via_setup_subdevs(&global_dev);
+ /*
+ * Set up the framebuffer device
+ */
+ ret = via_fb_pci_probe(&global_dev);
+ if (ret)
+ goto out_subdevs;
+ return 0;
+
+out_subdevs:
+ via_teardown_subdevs();
+ via_pci_teardown_mmio(&global_dev);
+out_disable:
+ pci_disable_device(pdev);
+ return ret;
+}
+
+static void via_pci_remove(struct pci_dev *pdev)
+{
+ via_teardown_subdevs();
+ via_fb_pci_remove(pdev);
+ via_pci_teardown_mmio(&global_dev);
+ pci_disable_device(pdev);
+}
+
+
+static struct pci_device_id via_pci_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
+ .driver_data = UNICHROME_CLE266 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
+ .driver_data = UNICHROME_K400 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
+ .driver_data = UNICHROME_K800 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
+ .driver_data = UNICHROME_PM800 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN700_DID),
+ .driver_data = UNICHROME_CN700 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
+ .driver_data = UNICHROME_CX700 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
+ .driver_data = UNICHROME_CN750 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
+ .driver_data = UNICHROME_K8M890 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
+ .driver_data = UNICHROME_P4M890 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
+ .driver_data = UNICHROME_P4M900 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
+ .driver_data = UNICHROME_VX800 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
+ .driver_data = UNICHROME_VX855 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX900_DID),
+ .driver_data = UNICHROME_VX900 },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, via_pci_table);
+
+static struct pci_driver via_driver = {
+ .name = "viafb",
+ .id_table = via_pci_table,
+ .probe = via_pci_probe,
+ .remove = via_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = via_suspend,
+ .resume = via_resume,
+#endif
+};
+
+static int __init via_core_init(void)
+{
+ int ret;
+
+ ret = viafb_init();
+ if (ret)
+ return ret;
+ viafb_i2c_init();
+ viafb_gpio_init();
+ return pci_register_driver(&via_driver);
+}
+
+static void __exit via_core_exit(void)
+{
+ pci_unregister_driver(&via_driver);
+ viafb_gpio_exit();
+ viafb_i2c_exit();
+ viafb_exit();
+}
+
+module_init(via_core_init);
+module_exit(via_core_exit);