mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 18:15:04 +07:00
d6ba32d5c6
Similar to CE4100, BayTrail LPSS SPI can be PCI enumerated as well. Thus, the functions are renamed from ce4100_xxx to pxa2xx_spi_pci_xxx to clarify that this is a generic PCI glue layer. Also, added required infrastructure to support SPI hosts with different configurations. This patch is based on Mika Westerberg's previous work. Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
129 lines
2.9 KiB
C
129 lines
2.9 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>
|
|
|
|
enum {
|
|
PORT_CE4100,
|
|
PORT_BYT,
|
|
};
|
|
|
|
struct pxa_spi_info {
|
|
enum pxa_ssp_type type;
|
|
int port_id;
|
|
int num_chipselect;
|
|
int tx_slave_id;
|
|
int tx_chan_id;
|
|
int rx_slave_id;
|
|
int rx_chan_id;
|
|
};
|
|
|
|
static struct pxa_spi_info spi_info_configs[] = {
|
|
[PORT_CE4100] = {
|
|
.type = PXA25x_SSP,
|
|
.port_id = -1,
|
|
.num_chipselect = -1,
|
|
.tx_slave_id = -1,
|
|
.tx_chan_id = -1,
|
|
.rx_slave_id = -1,
|
|
.rx_chan_id = -1,
|
|
},
|
|
[PORT_BYT] = {
|
|
.type = LPSS_SSP,
|
|
.port_id = 0,
|
|
.num_chipselect = 1,
|
|
.tx_slave_id = 0,
|
|
.tx_chan_id = 0,
|
|
.rx_slave_id = 1,
|
|
.rx_chan_id = 1,
|
|
},
|
|
};
|
|
|
|
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;
|
|
|
|
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;
|
|
spi_pdata.tx_slave_id = c->tx_slave_id;
|
|
spi_pdata.tx_chan_id = c->tx_chan_id;
|
|
spi_pdata.rx_slave_id = c->rx_slave_id;
|
|
spi_pdata.rx_chan_id = c->rx_chan_id;
|
|
spi_pdata.enable_dma = c->rx_slave_id >= 0 && c->tx_slave_id >= 0;
|
|
|
|
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;
|
|
|
|
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))
|
|
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);
|
|
|
|
platform_device_unregister(pdev);
|
|
}
|
|
|
|
static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
|
|
{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
|
|
{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
|
|
{ },
|
|
};
|
|
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>");
|