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linux/drivers/spi/spi-pxa2xx-pci.c
Andy Shevchenko fcaaf76ed5
spi: pxa2xx-pci: Constify struct pxa_spi_info variables 
Now when there are no dynamical changes required, we may
constify struct pxa_spi_info variables.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220225172350.69797-11-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-02-28 12:10:27 +00:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* PCI glue driver for SPI PXA2xx compatible controllers.
* CE4100's SPI device is more or less the same one as found on PXA.
*
* Copyright (C) 2016, 2021 Intel Corporation
*/
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/dmaengine.h>
#include <linux/platform_data/dma-dw.h>
#define PCI_DEVICE_ID_INTEL_QUARK_X1000 0x0935
#define PCI_DEVICE_ID_INTEL_BYT 0x0f0e
#define PCI_DEVICE_ID_INTEL_MRFLD 0x1194
#define PCI_DEVICE_ID_INTEL_BSW0 0x228e
#define PCI_DEVICE_ID_INTEL_BSW1 0x2290
#define PCI_DEVICE_ID_INTEL_BSW2 0x22ac
#define PCI_DEVICE_ID_INTEL_CE4100 0x2e6a
#define PCI_DEVICE_ID_INTEL_LPT0_0 0x9c65
#define PCI_DEVICE_ID_INTEL_LPT0_1 0x9c66
#define PCI_DEVICE_ID_INTEL_LPT1_0 0x9ce5
#define PCI_DEVICE_ID_INTEL_LPT1_1 0x9ce6
struct pxa_spi_info {
int (*setup)(struct pci_dev *pdev, struct pxa2xx_spi_controller *c);
};
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 mrfld3_tx_param = { .dst_id = 15 };
static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
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 struct dw_dma_slave lpt1_tx_param = { .dst_id = 0 };
static struct dw_dma_slave lpt1_rx_param = { .src_id = 1 };
static struct dw_dma_slave lpt0_tx_param = { .dst_id = 2 };
static struct dw_dma_slave lpt0_rx_param = { .src_id = 3 };
static void pxa2xx_spi_pci_clk_unregister(void *clk)
{
clk_unregister(clk);
}
static int pxa2xx_spi_pci_clk_register(struct pci_dev *dev, struct ssp_device *ssp,
unsigned long rate)
{
char buf[40];
snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
ssp->clk = clk_register_fixed_rate(&dev->dev, buf, NULL, 0, rate);
if (IS_ERR(ssp->clk))
return PTR_ERR(ssp->clk);
return devm_add_action_or_reset(&dev->dev, pxa2xx_spi_pci_clk_unregister, ssp->clk);
}
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 void lpss_dma_put_device(void *dma_dev)
{
pci_dev_put(dma_dev);
}
static int lpss_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
{
struct ssp_device *ssp = &c->ssp;
struct dw_dma_slave *tx, *rx;
struct pci_dev *dma_dev;
int ret;
switch (dev->device) {
case PCI_DEVICE_ID_INTEL_BYT:
ssp->type = LPSS_BYT_SSP;
ssp->port_id = 0;
c->tx_param = &byt_tx_param;
c->rx_param = &byt_rx_param;
break;
case PCI_DEVICE_ID_INTEL_BSW0:
ssp->type = LPSS_BSW_SSP;
ssp->port_id = 0;
c->tx_param = &bsw0_tx_param;
c->rx_param = &bsw0_rx_param;
break;
case PCI_DEVICE_ID_INTEL_BSW1:
ssp->type = LPSS_BSW_SSP;
ssp->port_id = 1;
c->tx_param = &bsw1_tx_param;
c->rx_param = &bsw1_rx_param;
break;
case PCI_DEVICE_ID_INTEL_BSW2:
ssp->type = LPSS_BSW_SSP;
ssp->port_id = 2;
c->tx_param = &bsw2_tx_param;
c->rx_param = &bsw2_rx_param;
break;
case PCI_DEVICE_ID_INTEL_LPT0_0:
case PCI_DEVICE_ID_INTEL_LPT1_0:
ssp->type = LPSS_LPT_SSP;
ssp->port_id = 0;
c->tx_param = &lpt0_tx_param;
c->rx_param = &lpt0_rx_param;
break;
case PCI_DEVICE_ID_INTEL_LPT0_1:
case PCI_DEVICE_ID_INTEL_LPT1_1:
ssp->type = LPSS_LPT_SSP;
ssp->port_id = 1;
c->tx_param = &lpt1_tx_param;
c->rx_param = &lpt1_rx_param;
break;
default:
return -ENODEV;
}
c->num_chipselect = 1;
ret = pxa2xx_spi_pci_clk_register(dev, ssp, 50000000);
if (ret)
return ret;
dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
if (ret)
return ret;
tx = c->tx_param;
tx->dma_dev = &dma_dev->dev;
tx->m_master = 0;
tx->p_master = 1;
rx = c->rx_param;
rx->dma_dev = &dma_dev->dev;
rx->m_master = 0;
rx->p_master = 1;
c->dma_filter = lpss_dma_filter;
c->dma_burst_size = 1;
c->enable_dma = 1;
return 0;
}
static const struct pxa_spi_info lpss_info_config = {
.setup = lpss_spi_setup,
};
static int ce4100_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
{
struct ssp_device *ssp = &c->ssp;
ssp->type = PXA25x_SSP;
ssp->port_id = dev->devfn;
c->num_chipselect = dev->devfn;
return pxa2xx_spi_pci_clk_register(dev, ssp, 3686400);
}
static const struct pxa_spi_info ce4100_info_config = {
.setup = ce4100_spi_setup,
};
static int mrfld_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
{
struct ssp_device *ssp = &c->ssp;
struct dw_dma_slave *tx, *rx;
struct pci_dev *dma_dev;
int ret;
ssp->type = MRFLD_SSP;
switch (PCI_FUNC(dev->devfn)) {
case 0:
ssp->port_id = 3;
c->num_chipselect = 1;
c->tx_param = &mrfld3_tx_param;
c->rx_param = &mrfld3_rx_param;
break;
case 1:
ssp->port_id = 5;
c->num_chipselect = 4;
c->tx_param = &mrfld5_tx_param;
c->rx_param = &mrfld5_rx_param;
break;
case 2:
ssp->port_id = 6;
c->num_chipselect = 1;
c->tx_param = &mrfld6_tx_param;
c->rx_param = &mrfld6_rx_param;
break;
default:
return -ENODEV;
}
ret = pxa2xx_spi_pci_clk_register(dev, ssp, 25000000);
if (ret)
return ret;
dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
if (ret)
return ret;
tx = c->tx_param;
tx->dma_dev = &dma_dev->dev;
rx = c->rx_param;
rx->dma_dev = &dma_dev->dev;
c->dma_filter = lpss_dma_filter;
c->dma_burst_size = 8;
c->enable_dma = 1;
return 0;
}
static const struct pxa_spi_info mrfld_info_config = {
.setup = mrfld_spi_setup,
};
static int qrk_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
{
struct ssp_device *ssp = &c->ssp;
ssp->type = QUARK_X1000_SSP;
ssp->port_id = dev->devfn;
c->num_chipselect = 1;
return pxa2xx_spi_pci_clk_register(dev, ssp, 50000000);
}
static const struct pxa_spi_info qrk_info_config = {
.setup = qrk_spi_setup,
};
static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
const struct pxa_spi_info *info;
struct platform_device_info pi;
int ret;
struct platform_device *pdev;
struct pxa2xx_spi_controller spi_pdata;
struct ssp_device *ssp;
ret = pcim_enable_device(dev);
if (ret)
return ret;
ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
if (ret)
return ret;
memset(&spi_pdata, 0, sizeof(spi_pdata));
ssp = &spi_pdata.ssp;
ssp->dev = &dev->dev;
ssp->phys_base = pci_resource_start(dev, 0);
ssp->mmio_base = pcim_iomap_table(dev)[0];
info = (struct pxa_spi_info *)ent->driver_data;
ret = info->setup(dev, &spi_pdata);
if (ret)
return ret;
pci_set_master(dev);
ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
if (ret < 0)
return ret;
ssp->irq = pci_irq_vector(dev, 0);
memset(&pi, 0, sizeof(pi));
pi.fwnode = dev_fwnode(&dev->dev);
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_DEVICE_DATA(INTEL, QUARK_X1000, &qrk_info_config) },
{ PCI_DEVICE_DATA(INTEL, BYT, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, MRFLD, &mrfld_info_config) },
{ PCI_DEVICE_DATA(INTEL, BSW0, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, BSW1, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, BSW2, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, CE4100, &ce4100_info_config) },
{ PCI_DEVICE_DATA(INTEL, LPT0_0, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, LPT0_1, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, LPT1_0, &lpss_info_config) },
{ PCI_DEVICE_DATA(INTEL, LPT1_1, &lpss_info_config) },
{ }
};
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>");
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