mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull slave-dmaengine updates from Vinod Koul: "For dmaengine contributions we have: - designware cleanup by Andy - my series moving device_control users to dmanegine_xxx APIs for later removal of device_control API - minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma etc" * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits) serial: atmel: add missing dmaengine header dmaengine: remove FSLDMA_EXTERNAL_START dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method carma-fpga: move to fsl_dma_external_start() carma-fpga: use dmaengine_xxx() API dmaengine: freescale: add and export fsl_dma_external_start() dmaengine: add dmaengine_prep_dma_sg() helper video: mx3fb: use dmaengine_terminate_all() API serial: sh-sci: use dmaengine_terminate_all() API net: ks8842: use dmaengine_terminate_all() API mtd: sh_flctl: use dmaengine_terminate_all() API mtd: fsmc_nand: use dmaengine_terminate_all() API V4L2: mx3_camer: use dmaengine_pause() API dmaengine: coh901318: use dmaengine_terminate_all() API pata_arasan_cf: use dmaengine_terminate_all() API dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause() dmaengine: dw: export probe()/remove() and Co to users dmaengine: dw: enable and disable controller when needed dmaengine: dw: always export dw_dma_{en,dis}able dmaengine: dw: introduce dw_dma_on() helper ...
213 lines
5 KiB
C
213 lines
5 KiB
C
/*
|
|
* CE4100's SPI device is more or less the same one as found on PXA
|
|
*
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spi/pxa2xx_spi.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/clk-provider.h>
|
|
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/platform_data/dma-dw.h>
|
|
|
|
enum {
|
|
PORT_CE4100,
|
|
PORT_BYT,
|
|
PORT_BSW0,
|
|
PORT_BSW1,
|
|
PORT_BSW2,
|
|
};
|
|
|
|
struct pxa_spi_info {
|
|
enum pxa_ssp_type type;
|
|
int port_id;
|
|
int num_chipselect;
|
|
unsigned long max_clk_rate;
|
|
|
|
/* DMA channel request parameters */
|
|
void *tx_param;
|
|
void *rx_param;
|
|
};
|
|
|
|
static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
|
|
static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
|
|
|
|
static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
|
|
static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
|
|
static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
|
|
static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
|
|
static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
|
|
static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
|
|
|
|
static bool lpss_dma_filter(struct dma_chan *chan, void *param)
|
|
{
|
|
struct dw_dma_slave *dws = param;
|
|
|
|
if (dws->dma_dev != chan->device->dev)
|
|
return false;
|
|
|
|
chan->private = dws;
|
|
return true;
|
|
}
|
|
|
|
static struct pxa_spi_info spi_info_configs[] = {
|
|
[PORT_CE4100] = {
|
|
.type = PXA25x_SSP,
|
|
.port_id = -1,
|
|
.num_chipselect = -1,
|
|
.max_clk_rate = 3686400,
|
|
},
|
|
[PORT_BYT] = {
|
|
.type = LPSS_SSP,
|
|
.port_id = 0,
|
|
.num_chipselect = 1,
|
|
.max_clk_rate = 50000000,
|
|
.tx_param = &byt_tx_param,
|
|
.rx_param = &byt_rx_param,
|
|
},
|
|
[PORT_BSW0] = {
|
|
.type = LPSS_SSP,
|
|
.port_id = 0,
|
|
.num_chipselect = 1,
|
|
.max_clk_rate = 50000000,
|
|
.tx_param = &bsw0_tx_param,
|
|
.rx_param = &bsw0_rx_param,
|
|
},
|
|
[PORT_BSW1] = {
|
|
.type = LPSS_SSP,
|
|
.port_id = 1,
|
|
.num_chipselect = 1,
|
|
.max_clk_rate = 50000000,
|
|
.tx_param = &bsw1_tx_param,
|
|
.rx_param = &bsw1_rx_param,
|
|
},
|
|
[PORT_BSW2] = {
|
|
.type = LPSS_SSP,
|
|
.port_id = 2,
|
|
.num_chipselect = 1,
|
|
.max_clk_rate = 50000000,
|
|
.tx_param = &bsw2_tx_param,
|
|
.rx_param = &bsw2_rx_param,
|
|
},
|
|
};
|
|
|
|
static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct platform_device_info pi;
|
|
int ret;
|
|
struct platform_device *pdev;
|
|
struct pxa2xx_spi_master spi_pdata;
|
|
struct ssp_device *ssp;
|
|
struct pxa_spi_info *c;
|
|
char buf[40];
|
|
struct pci_dev *dma_dev;
|
|
|
|
ret = pcim_enable_device(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
|
|
if (ret)
|
|
return ret;
|
|
|
|
c = &spi_info_configs[ent->driver_data];
|
|
|
|
memset(&spi_pdata, 0, sizeof(spi_pdata));
|
|
spi_pdata.num_chipselect = (c->num_chipselect > 0) ?
|
|
c->num_chipselect : dev->devfn;
|
|
|
|
dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
|
|
|
|
if (c->tx_param) {
|
|
struct dw_dma_slave *slave = c->tx_param;
|
|
|
|
slave->dma_dev = &dma_dev->dev;
|
|
slave->src_master = 1;
|
|
slave->dst_master = 0;
|
|
}
|
|
|
|
if (c->rx_param) {
|
|
struct dw_dma_slave *slave = c->rx_param;
|
|
|
|
slave->dma_dev = &dma_dev->dev;
|
|
slave->src_master = 1;
|
|
slave->dst_master = 0;
|
|
}
|
|
|
|
spi_pdata.dma_filter = lpss_dma_filter;
|
|
spi_pdata.tx_param = c->tx_param;
|
|
spi_pdata.rx_param = c->rx_param;
|
|
spi_pdata.enable_dma = c->rx_param && c->tx_param;
|
|
|
|
ssp = &spi_pdata.ssp;
|
|
ssp->phys_base = pci_resource_start(dev, 0);
|
|
ssp->mmio_base = pcim_iomap_table(dev)[0];
|
|
if (!ssp->mmio_base) {
|
|
dev_err(&dev->dev, "failed to ioremap() registers\n");
|
|
return -EIO;
|
|
}
|
|
ssp->irq = dev->irq;
|
|
ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
|
|
ssp->type = c->type;
|
|
|
|
snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
|
|
ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL,
|
|
CLK_IS_ROOT, c->max_clk_rate);
|
|
if (IS_ERR(ssp->clk))
|
|
return PTR_ERR(ssp->clk);
|
|
|
|
memset(&pi, 0, sizeof(pi));
|
|
pi.parent = &dev->dev;
|
|
pi.name = "pxa2xx-spi";
|
|
pi.id = ssp->port_id;
|
|
pi.data = &spi_pdata;
|
|
pi.size_data = sizeof(spi_pdata);
|
|
|
|
pdev = platform_device_register_full(&pi);
|
|
if (IS_ERR(pdev)) {
|
|
clk_unregister(ssp->clk);
|
|
return PTR_ERR(pdev);
|
|
}
|
|
|
|
pci_set_drvdata(dev, pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
|
|
{
|
|
struct platform_device *pdev = pci_get_drvdata(dev);
|
|
struct pxa2xx_spi_master *spi_pdata;
|
|
|
|
spi_pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
platform_device_unregister(pdev);
|
|
clk_unregister(spi_pdata->ssp.clk);
|
|
}
|
|
|
|
static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
|
|
{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
|
|
{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
|
|
{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
|
|
{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
|
|
{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
|
|
|
|
static struct pci_driver pxa2xx_spi_pci_driver = {
|
|
.name = "pxa2xx_spi_pci",
|
|
.id_table = pxa2xx_spi_pci_devices,
|
|
.probe = pxa2xx_spi_pci_probe,
|
|
.remove = pxa2xx_spi_pci_remove,
|
|
};
|
|
|
|
module_pci_driver(pxa2xx_spi_pci_driver);
|
|
|
|
MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
|