[deliverable/linux.git] / drivers / spi / spi-pxa2xx-pci.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>");
Commit	Line	Data
d6ea3df0 SAS	1	/*
	2	* CE4100's SPI device is more or less the same one as found on PXA
	3	*
	4	*/
	5	#include <linux/pci.h>
	6	#include <linux/platform_device.h>
	7	#include <linux/of_device.h>
d7614de4	8	#include <linux/module.h>
d6ea3df0	9	#include <linux/spi/pxa2xx_spi.h>
afa93c90 CCE	10	#include <linux/clk.h>
afa93c90 CCE	11	#include <linux/clk-provider.h>
d6ea3df0	12
b729bf34 MW	13	#include <linux/dmaengine.h>
	14	#include <linux/platform_data/dma-dw.h>
	15
d6ba32d5 CCE	16	enum {
	17	PORT_CE4100,
	18	PORT_BYT,
39d36536 MW	19	PORT_BSW0,
	20	PORT_BSW1,
	21	PORT_BSW2,
d6ba32d5 CCE	22	};
	23
	24	struct pxa_spi_info {
	25	enum pxa_ssp_type type;
	26	int port_id;
	27	int num_chipselect;
afa93c90	28	unsigned long max_clk_rate;
b729bf34 MW	29
	30	/* DMA channel request parameters */
	31	void *tx_param;
	32	void *rx_param;
d6ba32d5 CCE	33	};
d6ba32d5 CCE	34
b729bf34 MW	35	static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
	36	static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
	37
39d36536 MW	38	static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
	39	static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
	40	static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
	41	static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
	42	static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
	43	static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
	44
b729bf34 MW	45	static bool lpss_dma_filter(struct dma_chan chan, void param)
	46	{
	47	struct dw_dma_slave *dws = param;
	48
	49	if (dws->dma_dev != chan->device->dev)
	50	return false;
	51
	52	chan->private = dws;
	53	return true;
	54	}
	55
d6ba32d5 CCE	56	static struct pxa_spi_info spi_info_configs[] = {
	57	[PORT_CE4100] = {
	58	.type = PXA25x_SSP,
	59	.port_id = -1,
	60	.num_chipselect = -1,
afa93c90	61	.max_clk_rate = 3686400,
d6ba32d5 CCE	62	},
	63	[PORT_BYT] = {
	64	.type = LPSS_SSP,
	65	.port_id = 0,
	66	.num_chipselect = 1,
afa93c90	67	.max_clk_rate = 50000000,
b729bf34 MW	68	.tx_param = &byt_tx_param,
b729bf34 MW	69	.rx_param = &byt_rx_param,
d6ba32d5	70	},
39d36536 MW	71	[PORT_BSW0] = {
	72	.type = LPSS_SSP,
	73	.port_id = 0,
	74	.num_chipselect = 1,
	75	.max_clk_rate = 50000000,
	76	.tx_param = &bsw0_tx_param,
	77	.rx_param = &bsw0_rx_param,
	78	},
	79	[PORT_BSW1] = {
	80	.type = LPSS_SSP,
	81	.port_id = 1,
	82	.num_chipselect = 1,
	83	.max_clk_rate = 50000000,
	84	.tx_param = &bsw1_tx_param,
	85	.rx_param = &bsw1_rx_param,
	86	},
	87	[PORT_BSW2] = {
	88	.type = LPSS_SSP,
	89	.port_id = 2,
	90	.num_chipselect = 1,
	91	.max_clk_rate = 50000000,
	92	.tx_param = &bsw2_tx_param,
	93	.rx_param = &bsw2_rx_param,
d6ba32d5 CCE	94	},
	95	};
	96
	97	static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
d6ea3df0 SAS	98	const struct pci_device_id *ent)
d6ea3df0 SAS	99	{
0202775b	100	struct platform_device_info pi;
d6ea3df0	101	int ret;
d6ea3df0	102	struct platform_device *pdev;
0f3e1d27	103	struct pxa2xx_spi_master spi_pdata;
d6ea3df0	104	struct ssp_device *ssp;
d6ba32d5	105	struct pxa_spi_info *c;
afa93c90	106	char buf[40];
b729bf34	107	struct pci_dev *dma_dev;
d6ea3df0	108
0202775b	109	ret = pcim_enable_device(dev);
d6ea3df0 SAS	110	if (ret)
	111	return ret;
	112
0202775b	113	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
c1346340	114	if (ret)
d6ea3df0	115	return ret;
d6ea3df0	116
d6ba32d5 CCE	117	c = &spi_info_configs[ent->driver_data];
d6ba32d5 CCE	118
0f3e1d27	119	memset(&spi_pdata, 0, sizeof(spi_pdata));
d6ba32d5 CCE	120	spi_pdata.num_chipselect = (c->num_chipselect > 0) ?
d6ba32d5 CCE	121	c->num_chipselect : dev->devfn;
b729bf34 MW	122
	123	dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
	124
	125	if (c->tx_param) {
	126	struct dw_dma_slave *slave = c->tx_param;
	127
	128	slave->dma_dev = &dma_dev->dev;
	129	slave->src_master = 1;
	130	slave->dst_master = 0;
	131	}
	132
	133	if (c->rx_param) {
	134	struct dw_dma_slave *slave = c->rx_param;
	135
	136	slave->dma_dev = &dma_dev->dev;
	137	slave->src_master = 1;
	138	slave->dst_master = 0;
	139	}
	140
	141	spi_pdata.dma_filter = lpss_dma_filter;
	142	spi_pdata.tx_param = c->tx_param;
	143	spi_pdata.rx_param = c->rx_param;
	144	spi_pdata.enable_dma = c->rx_param && c->tx_param;
d6ea3df0	145
851bacf5	146	ssp = &spi_pdata.ssp;
d6ea3df0	147	ssp->phys_base = pci_resource_start(dev, 0);
0202775b	148	ssp->mmio_base = pcim_iomap_table(dev)[0];
d6ea3df0	149	if (!ssp->mmio_base) {
0202775b MW	150	dev_err(&dev->dev, "failed to ioremap() registers\n");
0202775b MW	151	return -EIO;
d6ea3df0 SAS	152	}
d6ea3df0 SAS	153	ssp->irq = dev->irq;
d6ba32d5 CCE	154	ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
d6ba32d5 CCE	155	ssp->type = c->type;
d6ea3df0	156
afa93c90 CCE	157	snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
	158	ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL,
	159	CLK_IS_ROOT, c->max_clk_rate);
	160	if (IS_ERR(ssp->clk))
	161	return PTR_ERR(ssp->clk);
	162
0202775b MW	163	memset(&pi, 0, sizeof(pi));
	164	pi.parent = &dev->dev;
	165	pi.name = "pxa2xx-spi";
	166	pi.id = ssp->port_id;
	167	pi.data = &spi_pdata;
	168	pi.size_data = sizeof(spi_pdata);
d6ea3df0	169
0202775b	170	pdev = platform_device_register_full(&pi);
afa93c90 CCE	171	if (IS_ERR(pdev)) {
afa93c90 CCE	172	clk_unregister(ssp->clk);
d77b5382	173	return PTR_ERR(pdev);
afa93c90	174	}
d6ea3df0	175
851bacf5	176	pci_set_drvdata(dev, pdev);
d6ea3df0	177
0202775b	178	return 0;
d6ea3df0 SAS	179	}
d6ea3df0 SAS	180
d6ba32d5	181	static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
d6ea3df0	182	{
851bacf5	183	struct platform_device *pdev = pci_get_drvdata(dev);
afa93c90 CCE	184	struct pxa2xx_spi_master *spi_pdata;
	185
	186	spi_pdata = dev_get_platdata(&pdev->dev);
d6ea3df0	187
851bacf5	188	platform_device_unregister(pdev);
afa93c90	189	clk_unregister(spi_pdata->ssp.clk);
d6ea3df0 SAS	190	}
d6ea3df0 SAS	191
d6ba32d5 CCE	192	static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
	193	{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
	194	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
39d36536 MW	195	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
	196	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
	197	{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
d6ea3df0 SAS	198	{ },
d6ea3df0 SAS	199	};
d6ba32d5	200	MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
d6ea3df0	201
d6ba32d5 CCE	202	static struct pci_driver pxa2xx_spi_pci_driver = {
	203	.name = "pxa2xx_spi_pci",
	204	.id_table = pxa2xx_spi_pci_devices,
	205	.probe = pxa2xx_spi_pci_probe,
	206	.remove = pxa2xx_spi_pci_remove,
d6ea3df0 SAS	207	};
d6ea3df0 SAS	208
d6ba32d5	209	module_pci_driver(pxa2xx_spi_pci_driver);
d6ea3df0	210
d6ba32d5	211	MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
d6ea3df0 SAS	212	MODULE_LICENSE("GPL v2");
d6ea3df0 SAS	213	MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");