/*
* This function will allocate both the DMA descriptor structure, and the
* buffers it contains. These are used to contain the descriptors used
* by the system.
*/
int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
struct list_head *head, const char *name,
int nbuf, int ndesc, bool is_tx)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
u8 *ds;
int i, bsize, desc_len;
ath_dbg(common, CONFIG, "%s DMA: %u buffers %u desc/buf\n",
name, nbuf, ndesc);
INIT_LIST_HEAD(head);
if (is_tx)
desc_len = sc->sc_ah->caps.tx_desc_len;
else
desc_len = sizeof(struct ath_desc);
/* ath_desc must be a multiple of DWORDs */
if ((desc_len % 4) != 0) {
ath_err(common, "ath_desc not DWORD aligned\n");
BUG_ON((desc_len % 4) != 0);
return -ENOMEM;
}
dd->dd_desc_len = desc_len * nbuf * ndesc;
/*
* Need additional DMA memory because we can't use
* descriptors that cross the 4K page boundary. Assume
* one skipped descriptor per 4K page.
*/
if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
u32 ndesc_skipped =
ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
u32 dma_len;
while (ndesc_skipped) {
dma_len = ndesc_skipped * desc_len;
dd->dd_desc_len += dma_len;
ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
}
}
/* allocate descriptors */
dd->dd_desc = dmam_alloc_coherent(sc->dev, dd->dd_desc_len,
&dd->dd_desc_paddr, GFP_KERNEL);
if (!dd->dd_desc)
return -ENOMEM;
ds = (u8 *) dd->dd_desc;
ath_dbg(common, CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
name, ds, (u32) dd->dd_desc_len,
ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
/* allocate buffers */
if (is_tx) {
struct ath_buf *bf;
bsize = sizeof(struct ath_buf) * nbuf;
bf = devm_kzalloc(sc->dev, bsize, GFP_KERNEL);
if (!bf)
return -ENOMEM;
for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
if (!(sc->sc_ah->caps.hw_caps &
ATH9K_HW_CAP_4KB_SPLITTRANS)) {
/*
* Skip descriptor addresses which can cause 4KB
* boundary crossing (addr + length) with a 32 dword
* descriptor fetch.
*/
while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
BUG_ON((caddr_t) bf->bf_desc >=
((caddr_t) dd->dd_desc +
dd->dd_desc_len));
ds += (desc_len * ndesc);
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
}
}
list_add_tail(&bf->list, head);
}
} else {
struct ath_rxbuf *bf;
bsize = sizeof(struct ath_rxbuf) * nbuf;
bf = devm_kzalloc(sc->dev, bsize, GFP_KERNEL);
if (!bf)
return -ENOMEM;
for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
if (!(sc->sc_ah->caps.hw_caps &
ATH9K_HW_CAP_4KB_SPLITTRANS)) {
/*
* Skip descriptor addresses which can cause 4KB
* boundary crossing (addr + length) with a 32 dword
* descriptor fetch.
*/
while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
BUG_ON((caddr_t) bf->bf_desc >=
((caddr_t) dd->dd_desc +
dd->dd_desc_len));
ds += (desc_len * ndesc);
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
}
}
list_add_tail(&bf->list, head);
}
}
return 0;
}
static int wm8505fb_probe(struct platform_device *pdev)
{
struct wm8505fb_info *fbi;
struct resource *res;
struct display_timings *disp_timing;
void *addr;
int ret;
struct fb_videomode mode;
u32 bpp;
dma_addr_t fb_mem_phys;
unsigned long fb_mem_len;
void *fb_mem_virt;
fbi = devm_kzalloc(&pdev->dev, sizeof(struct wm8505fb_info) +
sizeof(u32) * 16, GFP_KERNEL);
if (!fbi) {
dev_err(&pdev->dev, "Failed to initialize framebuffer device\n");
return -ENOMEM;
}
strcpy(fbi->fb.fix.id, DRIVER_NAME);
fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
fbi->fb.fix.xpanstep = 1;
fbi->fb.fix.ypanstep = 1;
fbi->fb.fix.ywrapstep = 0;
fbi->fb.fix.accel = FB_ACCEL_NONE;
fbi->fb.fbops = &wm8505fb_ops;
fbi->fb.flags = FBINFO_DEFAULT
| FBINFO_HWACCEL_COPYAREA
| FBINFO_HWACCEL_FILLRECT
| FBINFO_HWACCEL_XPAN
| FBINFO_HWACCEL_YPAN
| FBINFO_VIRTFB
| FBINFO_PARTIAL_PAN_OK;
fbi->fb.node = -1;
addr = fbi;
addr = addr + sizeof(struct wm8505fb_info);
fbi->fb.pseudo_palette = addr;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fbi->regbase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(fbi->regbase))
return PTR_ERR(fbi->regbase);
disp_timing = of_get_display_timings(pdev->dev.of_node);
if (!disp_timing)
return -EINVAL;
ret = of_get_fb_videomode(pdev->dev.of_node, &mode, OF_USE_NATIVE_MODE);
if (ret)
return ret;
ret = of_property_read_u32(pdev->dev.of_node, "bits-per-pixel", &bpp);
if (ret)
return ret;
fb_videomode_to_var(&fbi->fb.var, &mode);
fbi->fb.var.nonstd = 0;
fbi->fb.var.activate = FB_ACTIVATE_NOW;
fbi->fb.var.height = -1;
fbi->fb.var.width = -1;
/* try allocating the framebuffer */
fb_mem_len = mode.xres * mode.yres * 2 * (bpp / 8);
fb_mem_virt = dmam_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys,
GFP_KERNEL);
if (!fb_mem_virt) {
pr_err("%s: Failed to allocate framebuffer\n", __func__);
return -ENOMEM;
}
fbi->fb.var.xres_virtual = mode.xres;
fbi->fb.var.yres_virtual = mode.yres * 2;
fbi->fb.var.bits_per_pixel = bpp;
fbi->fb.fix.smem_start = fb_mem_phys;
fbi->fb.fix.smem_len = fb_mem_len;
fbi->fb.screen_base = fb_mem_virt;
fbi->fb.screen_size = fb_mem_len;
fbi->contrast = 0x10;
ret = wm8505fb_set_par(&fbi->fb);
if (ret) {
dev_err(&pdev->dev, "Failed to set parameters\n");
return ret;
}
if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) {
dev_err(&pdev->dev, "Failed to allocate color map\n");
return -ENOMEM;
}
wm8505fb_init_hw(&fbi->fb);
platform_set_drvdata(pdev, fbi);
ret = register_framebuffer(&fbi->fb);
if (ret < 0) {
dev_err(&pdev->dev,
"Failed to register framebuffer device: %d\n", ret);
if (fbi->fb.cmap.len)
fb_dealloc_cmap(&fbi->fb.cmap);
return ret;
}
ret = device_create_file(&pdev->dev, &dev_attr_contrast);
if (ret < 0)
fb_warn(&fbi->fb, "failed to register attributes (%d)\n", ret);
fb_info(&fbi->fb, "%s frame buffer at 0x%lx-0x%lx\n",
fbi->fb.fix.id, fbi->fb.fix.smem_start,
fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1);
return 0;
}
static int __devinit pxa_ata_probe(struct platform_device *pdev)
{
struct ata_host *host;
struct ata_port *ap;
struct pata_pxa_data *data;
struct resource *cmd_res;
struct resource *ctl_res;
struct resource *dma_res;
struct resource *irq_res;
struct pata_pxa_pdata *pdata = pdev->dev.platform_data;
int ret = 0;
/*
* Resource validation, three resources are needed:
* - CMD port base address
* - CTL port base address
* - DMA port base address
* - IRQ pin
*/
if (pdev->num_resources != 4) {
dev_err(&pdev->dev, "invalid number of resources\n");
return -EINVAL;
}
/*
* CMD port base address
*/
cmd_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(cmd_res == NULL))
return -EINVAL;
/*
* CTL port base address
*/
ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (unlikely(ctl_res == NULL))
return -EINVAL;
/*
* DMA port base address
*/
dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (unlikely(dma_res == NULL))
return -EINVAL;
/*
* IRQ pin
*/
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (unlikely(irq_res == NULL))
return -EINVAL;
/*
* Allocate the host
*/
host = ata_host_alloc(&pdev->dev, 1);
if (!host)
return -ENOMEM;
ap = host->ports[0];
ap->ops = &pxa_ata_port_ops;
ap->pio_mask = ATA_PIO4;
ap->mwdma_mask = ATA_MWDMA2;
ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, cmd_res->start,
resource_size(cmd_res));
ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
resource_size(ctl_res));
ap->ioaddr.bmdma_addr = devm_ioremap(&pdev->dev, dma_res->start,
resource_size(dma_res));
/*
* Adjust register offsets
*/
ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
ap->ioaddr.data_addr = ap->ioaddr.cmd_addr +
(ATA_REG_DATA << pdata->reg_shift);
ap->ioaddr.error_addr = ap->ioaddr.cmd_addr +
(ATA_REG_ERR << pdata->reg_shift);
ap->ioaddr.feature_addr = ap->ioaddr.cmd_addr +
(ATA_REG_FEATURE << pdata->reg_shift);
ap->ioaddr.nsect_addr = ap->ioaddr.cmd_addr +
(ATA_REG_NSECT << pdata->reg_shift);
ap->ioaddr.lbal_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAL << pdata->reg_shift);
ap->ioaddr.lbam_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAM << pdata->reg_shift);
ap->ioaddr.lbah_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAH << pdata->reg_shift);
ap->ioaddr.device_addr = ap->ioaddr.cmd_addr +
(ATA_REG_DEVICE << pdata->reg_shift);
ap->ioaddr.status_addr = ap->ioaddr.cmd_addr +
(ATA_REG_STATUS << pdata->reg_shift);
ap->ioaddr.command_addr = ap->ioaddr.cmd_addr +
(ATA_REG_CMD << pdata->reg_shift);
/*
* Allocate and load driver's internal data structure
*/
data = devm_kzalloc(&pdev->dev, sizeof(struct pata_pxa_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
ap->private_data = data;
data->dma_dreq = pdata->dma_dreq;
data->dma_io_addr = dma_res->start;
/*
* Allocate space for the DMA descriptors
*/
data->dma_desc = dmam_alloc_coherent(&pdev->dev, PAGE_SIZE,
&data->dma_desc_addr, GFP_KERNEL);
if (!data->dma_desc)
return -EINVAL;
/*
* Request the DMA channel
*/
data->dma_channel = pxa_request_dma(DRV_NAME, DMA_PRIO_LOW,
pxa_ata_dma_irq, ap);
if (data->dma_channel < 0)
return -EBUSY;
/*
* Stop and clear the DMA channel
*/
DCSR(data->dma_channel) = 0;
/*
* Activate the ATA host
*/
ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
pdata->irq_flags, &pxa_ata_sht);
if (ret)
pxa_free_dma(data->dma_channel);
return ret;
}
int qpic_init_sps(struct platform_device *pdev,
struct qpic_sps_endpt *end_point)
{
int rc = 0;
struct sps_pipe *pipe_handle;
struct sps_connect *sps_config = &end_point->config;
struct sps_register_event *sps_event = &end_point->bam_event;
struct sps_bam_props bam = {0};
u32 bam_handle = 0;
if (qpic_res->sps_init)
return 0;
bam.phys_addr = qpic_res->qpic_phys + 0x4000;
bam.virt_addr = qpic_res->qpic_base + 0x4000;
bam.irq = qpic_res->irq - 4;
bam.manage = SPS_BAM_MGR_DEVICE_REMOTE | SPS_BAM_MGR_MULTI_EE;
rc = sps_phy2h(bam.phys_addr, &bam_handle);
if (rc)
rc = sps_register_bam_device(&bam, &bam_handle);
if (rc) {
pr_err("%s bam_handle is NULL", __func__);
rc = -ENOMEM;
goto out;
}
pipe_handle = sps_alloc_endpoint();
if (!pipe_handle) {
pr_err("sps_alloc_endpoint() failed\n");
rc = -ENOMEM;
goto out;
}
rc = sps_get_config(pipe_handle, sps_config);
if (rc) {
pr_err("sps_get_config() failed %d\n", rc);
goto free_endpoint;
}
/* WRITE CASE: source - system memory; destination - BAM */
sps_config->source = SPS_DEV_HANDLE_MEM;
sps_config->destination = bam_handle;
sps_config->mode = SPS_MODE_DEST;
sps_config->dest_pipe_index = 6;
sps_config->options = SPS_O_AUTO_ENABLE | SPS_O_EOT;
sps_config->lock_group = 0;
/*
* Descriptor FIFO is a cyclic FIFO. If 64 descriptors
* are allowed to be submitted before we get any ack for any of them,
* the descriptor FIFO size should be: (SPS_MAX_DESC_NUM + 1) *
* sizeof(struct sps_iovec).
*/
sps_config->desc.size = (64) *
sizeof(struct sps_iovec);
sps_config->desc.base = dmam_alloc_coherent(&pdev->dev,
sps_config->desc.size,
&sps_config->desc.phys_base,
GFP_KERNEL);
if (!sps_config->desc.base) {
pr_err("dmam_alloc_coherent() failed for size %x\n",
sps_config->desc.size);
rc = -ENOMEM;
goto free_endpoint;
}
memset(sps_config->desc.base, 0x00, sps_config->desc.size);
rc = sps_connect(pipe_handle, sps_config);
if (rc) {
pr_err("sps_connect() failed %d\n", rc);
goto free_endpoint;
}
init_completion(&end_point->completion);
sps_event->mode = SPS_TRIGGER_WAIT;
sps_event->options = SPS_O_EOT;
sps_event->xfer_done = &end_point->completion;
sps_event->user = (void *)qpic_res;
rc = sps_register_event(pipe_handle, sps_event);
if (rc) {
pr_err("sps_register_event() failed %d\n", rc);
goto sps_disconnect;
}
end_point->handle = pipe_handle;
qpic_res->sps_init = true;
goto out;
sps_disconnect:
sps_disconnect(pipe_handle);
free_endpoint:
sps_free_endpoint(pipe_handle);
out:
return rc;
}
/* probe for CAN-FD channel #pciefd_board->can_count */
static int pciefd_can_probe(struct pciefd_board *pciefd)
{
struct net_device *ndev;
struct pciefd_can *priv;
u32 clk;
int err;
/* allocate the candev object with default isize of echo skbs ring */
ndev = alloc_peak_canfd_dev(sizeof(*priv), pciefd->can_count,
PCIEFD_ECHO_SKB_MAX);
if (!ndev) {
dev_err(&pciefd->pci_dev->dev,
"failed to alloc candev object\n");
goto failure;
}
priv = netdev_priv(ndev);
/* fill-in candev private object: */
/* setup PCIe-FD own callbacks */
priv->ucan.pre_cmd = pciefd_pre_cmd;
priv->ucan.write_cmd = pciefd_write_cmd;
priv->ucan.post_cmd = pciefd_post_cmd;
priv->ucan.enable_tx_path = pciefd_enable_tx_path;
priv->ucan.alloc_tx_msg = pciefd_alloc_tx_msg;
priv->ucan.write_tx_msg = pciefd_write_tx_msg;
/* setup PCIe-FD own command buffer */
priv->ucan.cmd_buffer = &priv->pucan_cmd;
priv->ucan.cmd_maxlen = sizeof(priv->pucan_cmd);
priv->board = pciefd;
/* CAN config regs block address */
priv->reg_base = pciefd->reg_base + PCIEFD_CANX_OFF(priv->ucan.index);
/* allocate non-cacheable DMA'able 4KB memory area for Rx */
priv->rx_dma_vaddr = dmam_alloc_coherent(&pciefd->pci_dev->dev,
PCIEFD_RX_DMA_SIZE,
&priv->rx_dma_laddr,
GFP_KERNEL);
if (!priv->rx_dma_vaddr) {
dev_err(&pciefd->pci_dev->dev,
"Rx dmam_alloc_coherent(%u) failure\n",
PCIEFD_RX_DMA_SIZE);
goto err_free_candev;
}
/* allocate non-cacheable DMA'able 4KB memory area for Tx */
priv->tx_dma_vaddr = dmam_alloc_coherent(&pciefd->pci_dev->dev,
PCIEFD_TX_DMA_SIZE,
&priv->tx_dma_laddr,
GFP_KERNEL);
if (!priv->tx_dma_vaddr) {
dev_err(&pciefd->pci_dev->dev,
"Tx dmaim_alloc_coherent(%u) failure\n",
PCIEFD_TX_DMA_SIZE);
goto err_free_candev;
}
/* CAN clock in RST mode */
pciefd_can_writereg(priv, CANFD_MISC_TS_RST, PCIEFD_REG_CAN_MISC);
/* read current clock value */
clk = pciefd_can_readreg(priv, PCIEFD_REG_CAN_CLK_SEL);
switch (clk) {
case CANFD_CLK_SEL_20MHZ:
priv->ucan.can.clock.freq = 20 * 1000 * 1000;
break;
case CANFD_CLK_SEL_24MHZ:
priv->ucan.can.clock.freq = 24 * 1000 * 1000;
break;
case CANFD_CLK_SEL_30MHZ:
priv->ucan.can.clock.freq = 30 * 1000 * 1000;
break;
case CANFD_CLK_SEL_40MHZ:
priv->ucan.can.clock.freq = 40 * 1000 * 1000;
break;
case CANFD_CLK_SEL_60MHZ:
priv->ucan.can.clock.freq = 60 * 1000 * 1000;
break;
default:
pciefd_can_writereg(priv, CANFD_CLK_SEL_80MHZ,
PCIEFD_REG_CAN_CLK_SEL);
/* fallthough */
case CANFD_CLK_SEL_80MHZ:
priv->ucan.can.clock.freq = 80 * 1000 * 1000;
break;
}
ndev->irq = pciefd->pci_dev->irq;
SET_NETDEV_DEV(ndev, &pciefd->pci_dev->dev);
err = register_candev(ndev);
if (err) {
dev_err(&pciefd->pci_dev->dev,
"couldn't register CAN device: %d\n", err);
goto err_free_candev;
}
spin_lock_init(&priv->tx_lock);
/* save the object address in the board structure */
pciefd->can[pciefd->can_count] = priv;
dev_info(&pciefd->pci_dev->dev, "%s at reg_base=0x%p irq=%d\n",
ndev->name, priv->reg_base, pciefd->pci_dev->irq);
return 0;
err_free_candev:
free_candev(ndev);
failure:
return -ENOMEM;
}
int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state)
{
struct device *dev = &pdev->dev;
struct rpi_firmware *fw = platform_get_drvdata(pdev);
VCHIQ_SLOT_ZERO_T *vchiq_slot_zero;
struct resource *res;
void *slot_mem;
dma_addr_t slot_phys;
u32 channelbase;
int slot_mem_size, frag_mem_size;
int err, irq, i;
g_virt_to_bus_offset = virt_to_dma(dev, (void *)0);
(void)of_property_read_u32(dev->of_node, "cache-line-size",
&g_cache_line_size);
g_fragments_size = 2 * g_cache_line_size;
/* Allocate space for the channels in coherent memory */
slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE);
frag_mem_size = PAGE_ALIGN(g_fragments_size * MAX_FRAGMENTS);
slot_mem = dmam_alloc_coherent(dev, slot_mem_size + frag_mem_size,
&slot_phys, GFP_KERNEL);
if (!slot_mem) {
dev_err(dev, "could not allocate DMA memory\n");
return -ENOMEM;
}
WARN_ON(((int)slot_mem & (PAGE_SIZE - 1)) != 0);
vchiq_slot_zero = vchiq_init_slots(slot_mem, slot_mem_size);
if (!vchiq_slot_zero)
return -EINVAL;
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX] =
(int)slot_phys + slot_mem_size;
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX] =
MAX_FRAGMENTS;
g_fragments_base = (char *)slot_mem + slot_mem_size;
slot_mem_size += frag_mem_size;
g_free_fragments = g_fragments_base;
for (i = 0; i < (MAX_FRAGMENTS - 1); i++) {
*(char **)&g_fragments_base[i*g_fragments_size] =
&g_fragments_base[(i + 1)*g_fragments_size];
}
*(char **)&g_fragments_base[i * g_fragments_size] = NULL;
sema_init(&g_free_fragments_sema, MAX_FRAGMENTS);
if (vchiq_init_state(state, vchiq_slot_zero, 0) != VCHIQ_SUCCESS)
return -EINVAL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
g_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(g_regs))
return PTR_ERR(g_regs);
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(dev, "failed to get IRQ\n");
return irq;
}
err = devm_request_irq(dev, irq, vchiq_doorbell_irq, IRQF_IRQPOLL,
"VCHIQ doorbell", state);
if (err) {
dev_err(dev, "failed to register irq=%d\n", irq);
return err;
}
/* Send the base address of the slots to VideoCore */
channelbase = slot_phys;
err = rpi_firmware_property(fw, RPI_FIRMWARE_VCHIQ_INIT,
&channelbase, sizeof(channelbase));
if (err || channelbase) {
dev_err(dev, "failed to set channelbase\n");
return err ? : -ENXIO;
}
static int arc_emac_probe(struct platform_device *pdev)
{
struct resource res_regs;
struct device_node *phy_node;
struct arc_emac_priv *priv;
struct net_device *ndev;
const char *mac_addr;
unsigned int id, clock_frequency, irq;
int err;
if (!pdev->dev.of_node)
return -ENODEV;
/* Get PHY from device tree */
phy_node = of_parse_phandle(pdev->dev.of_node, "phy", 0);
if (!phy_node) {
dev_err(&pdev->dev, "failed to retrieve phy description from device tree\n");
return -ENODEV;
}
/* Get EMAC registers base address from device tree */
err = of_address_to_resource(pdev->dev.of_node, 0, &res_regs);
if (err) {
dev_err(&pdev->dev, "failed to retrieve registers base from device tree\n");
return -ENODEV;
}
/* Get CPU clock frequency from device tree */
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&clock_frequency)) {
dev_err(&pdev->dev, "failed to retrieve <clock-frequency> from device tree\n");
return -EINVAL;
}
/* Get IRQ from device tree */
irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (!irq) {
dev_err(&pdev->dev, "failed to retrieve <irq> value from device tree\n");
return -ENODEV;
}
ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
if (!ndev)
return -ENOMEM;
platform_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
ndev->netdev_ops = &arc_emac_netdev_ops;
ndev->ethtool_ops = &arc_emac_ethtool_ops;
ndev->watchdog_timeo = TX_TIMEOUT;
/* FIXME :: no multicast support yet */
ndev->flags &= ~IFF_MULTICAST;
priv = netdev_priv(ndev);
priv->dev = &pdev->dev;
priv->ndev = ndev;
priv->regs = devm_ioremap_resource(&pdev->dev, &res_regs);
if (IS_ERR(priv->regs)) {
err = PTR_ERR(priv->regs);
goto out;
}
dev_dbg(&pdev->dev, "Registers base address is 0x%p\n", priv->regs);
id = arc_reg_get(priv, R_ID);
/* Check for EMAC revision 5 or 7, magic number */
if (!(id == 0x0005fd02 || id == 0x0007fd02)) {
dev_err(&pdev->dev, "ARC EMAC not detected, id=0x%x\n", id);
err = -ENODEV;
goto out;
}
dev_info(&pdev->dev, "ARC EMAC detected with id: 0x%x\n", id);
/* Set poll rate so that it polls every 1 ms */
arc_reg_set(priv, R_POLLRATE, clock_frequency / 1000000);
/* Get max speed of operation from device tree */
if (of_property_read_u32(pdev->dev.of_node, "max-speed",
&priv->max_speed)) {
dev_err(&pdev->dev, "failed to retrieve <max-speed> from device tree\n");
err = -EINVAL;
goto out;
}
ndev->irq = irq;
dev_info(&pdev->dev, "IRQ is %d\n", ndev->irq);
/* Register interrupt handler for device */
err = devm_request_irq(&pdev->dev, ndev->irq, arc_emac_intr, 0,
ndev->name, ndev);
if (err) {
dev_err(&pdev->dev, "could not allocate IRQ\n");
goto out;
}
/* Get MAC address from device tree */
mac_addr = of_get_mac_address(pdev->dev.of_node);
if (mac_addr)
memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
else
eth_hw_addr_random(ndev);
dev_info(&pdev->dev, "MAC address is now %pM\n", ndev->dev_addr);
/* Do 1 allocation instead of 2 separate ones for Rx and Tx BD rings */
priv->rxbd = dmam_alloc_coherent(&pdev->dev, RX_RING_SZ + TX_RING_SZ,
&priv->rxbd_dma, GFP_KERNEL);
if (!priv->rxbd) {
dev_err(&pdev->dev, "failed to allocate data buffers\n");
err = -ENOMEM;
goto out;
}
priv->txbd = priv->rxbd + RX_BD_NUM;
priv->txbd_dma = priv->rxbd_dma + RX_RING_SZ;
dev_dbg(&pdev->dev, "EMAC Device addr: Rx Ring [0x%x], Tx Ring[%x]\n",
(unsigned int)priv->rxbd_dma, (unsigned int)priv->txbd_dma);
err = arc_mdio_probe(pdev, priv);
if (err) {
dev_err(&pdev->dev, "failed to probe MII bus\n");
goto out;
}
priv->phy_dev = of_phy_connect(ndev, phy_node, arc_emac_adjust_link, 0,
PHY_INTERFACE_MODE_MII);
if (!priv->phy_dev) {
dev_err(&pdev->dev, "of_phy_connect() failed\n");
err = -ENODEV;
goto out;
}
dev_info(&pdev->dev, "connected to %s phy with id 0x%x\n",
priv->phy_dev->drv->name, priv->phy_dev->phy_id);
netif_napi_add(ndev, &priv->napi, arc_emac_poll, ARC_EMAC_NAPI_WEIGHT);
err = register_netdev(ndev);
if (err) {
netif_napi_del(&priv->napi);
dev_err(&pdev->dev, "failed to register network device\n");
goto out;
}
return 0;
out:
free_netdev(ndev);
return err;
}
static int goldfish_audio_probe(struct platform_device *pdev)
{
int ret;
struct resource *r;
struct goldfish_audio *data;
dma_addr_t buf_addr;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
spin_lock_init(&data->lock);
init_waitqueue_head(&data->wait);
platform_set_drvdata(pdev, data);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
dev_err(&pdev->dev, "platform_get_resource failed\n");
return -ENODEV;
}
data->reg_base = devm_ioremap(&pdev->dev, r->start, PAGE_SIZE);
if (data->reg_base == NULL)
return -ENOMEM;
data->irq = platform_get_irq(pdev, 0);
if (data->irq < 0) {
dev_err(&pdev->dev, "platform_get_irq failed\n");
return -ENODEV;
}
data->buffer_virt = dmam_alloc_coherent(&pdev->dev,
COMBINED_BUFFER_SIZE, &buf_addr, GFP_KERNEL);
if (data->buffer_virt == NULL) {
dev_err(&pdev->dev, "allocate buffer failed\n");
return -ENOMEM;
}
data->buffer_phys = buf_addr;
data->write_buffer1 = data->buffer_virt;
data->write_buffer2 = data->buffer_virt + WRITE_BUFFER_SIZE;
data->read_buffer = data->buffer_virt + 2 * WRITE_BUFFER_SIZE;
ret = devm_request_irq(&pdev->dev, data->irq, goldfish_audio_interrupt,
IRQF_SHARED, pdev->name, data);
if (ret) {
dev_err(&pdev->dev, "request_irq failed\n");
return ret;
}
ret = misc_register(&goldfish_audio_device);
if (ret) {
dev_err(&pdev->dev,
"misc_register returned %d in goldfish_audio_init\n",
ret);
return ret;
}
AUDIO_WRITE64(data, AUDIO_SET_WRITE_BUFFER_1,
AUDIO_SET_WRITE_BUFFER_1_HIGH, buf_addr);
buf_addr += WRITE_BUFFER_SIZE;
AUDIO_WRITE64(data, AUDIO_SET_WRITE_BUFFER_2,
AUDIO_SET_WRITE_BUFFER_2_HIGH, buf_addr);
buf_addr += WRITE_BUFFER_SIZE;
data->read_supported = AUDIO_READ(data, AUDIO_READ_SUPPORTED);
if (data->read_supported)
AUDIO_WRITE64(data, AUDIO_SET_READ_BUFFER,
AUDIO_SET_READ_BUFFER_HIGH, buf_addr);
audio_data = data;
return 0;
}
int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state)
{
struct device *dev = &pdev->dev;
VCHIQ_SLOT_ZERO_T *vchiq_slot_zero;
struct resource *res;
void *slot_mem;
dma_addr_t slot_phys;
int slot_mem_size, frag_mem_size;
int err, irq, i;
g_virt_to_bus_offset = virt_to_dma(dev, (void *)0);
/* Allocate space for the channels in coherent memory */
slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE);
frag_mem_size = PAGE_ALIGN(sizeof(FRAGMENTS_T) * MAX_FRAGMENTS);
slot_mem = dmam_alloc_coherent(dev, slot_mem_size + frag_mem_size,
&slot_phys, GFP_KERNEL);
if (!slot_mem) {
dev_err(dev, "could not allocate DMA memory\n");
return -ENOMEM;
}
WARN_ON(((int)slot_mem & (PAGE_SIZE - 1)) != 0);
vchiq_slot_zero = vchiq_init_slots(slot_mem, slot_mem_size);
if (!vchiq_slot_zero)
return -EINVAL;
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX] =
(int)slot_phys + slot_mem_size;
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX] =
MAX_FRAGMENTS;
g_fragments_base = (FRAGMENTS_T *)(slot_mem + slot_mem_size);
slot_mem_size += frag_mem_size;
g_free_fragments = g_fragments_base;
for (i = 0; i < (MAX_FRAGMENTS - 1); i++) {
*(FRAGMENTS_T **)&g_fragments_base[i] =
&g_fragments_base[i + 1];
}
*(FRAGMENTS_T **)&g_fragments_base[i] = NULL;
sema_init(&g_free_fragments_sema, MAX_FRAGMENTS);
if (vchiq_init_state(state, vchiq_slot_zero, 0) != VCHIQ_SUCCESS)
return -EINVAL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
g_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(g_regs))
return PTR_ERR(g_regs);
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(dev, "failed to get IRQ\n");
return irq;
}
err = devm_request_irq(dev, irq, vchiq_doorbell_irq, IRQF_IRQPOLL,
"VCHIQ doorbell", state);
if (err) {
dev_err(dev, "failed to register irq=%d\n", irq);
return err;
}
/* Send the base address of the slots to VideoCore */
dsb(); /* Ensure all writes have completed */
err = bcm_mailbox_write(MBOX_CHAN_VCHIQ, (unsigned int)slot_phys);
if (err) {
dev_err(dev, "mailbox write failed\n");
return err;
}
vchiq_log_info(vchiq_arm_log_level,
"vchiq_init - done (slots %x, phys %pad)",
(unsigned int)vchiq_slot_zero, &slot_phys);
vchiq_call_connected_callbacks();
return 0;
}