[linux-2.6-block.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-provider.h>

#include <linux/dmaengine.h>
#include <linux/platform_data/dma-dw.h>

enum {
	PORT_CE4100,
	PORT_BYT,
	PORT_BSW0,
	PORT_BSW1,
	PORT_BSW2,
	PORT_QUARK_X1000,
	PORT_LPT,
};

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 struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };

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_BYT_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_BYT_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_BYT_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_BYT_SSP,
		.port_id = 2,
		.num_chipselect = 1,
		.max_clk_rate = 50000000,
		.tx_param = &bsw2_tx_param,
		.rx_param = &bsw2_rx_param,
	},
	[PORT_QUARK_X1000] = {
		.type = QUARK_X1000_SSP,
		.port_id = -1,
		.num_chipselect = 1,
		.max_clk_rate = 50000000,
	},
	[PORT_LPT] = {
		.type = LPSS_LPT_SSP,
		.port_id = 0,
		.num_chipselect = 1,
		.max_clk_rate = 50000000,
		.tx_param = &lpt_tx_param,
		.rx_param = &lpt_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, 0x0935), PORT_QUARK_X1000 },
	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
	{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
	{ PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
	{ },
};
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	10	#include <linux/clk-provider.h>
d6ea3df0	11
b729bf34 MW	12	#include <linux/dmaengine.h>
	13	#include <linux/platform_data/dma-dw.h>
	14
d6ba32d5 CCE	15	enum {
	16	PORT_CE4100,
	17	PORT_BYT,
39d36536 MW	18	PORT_BSW0,
	19	PORT_BSW1,
	20	PORT_BSW2,
e5262d05	21	PORT_QUARK_X1000,
caba248d	22	PORT_LPT,
d6ba32d5 CCE	23	};
	24
	25	struct pxa_spi_info {
	26	enum pxa_ssp_type type;
	27	int port_id;
	28	int num_chipselect;
afa93c90	29	unsigned long max_clk_rate;
b729bf34 MW	30
	31	/* DMA channel request parameters */
	32	void *tx_param;
	33	void *rx_param;
d6ba32d5 CCE	34	};
d6ba32d5 CCE	35
b729bf34 MW	36	static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
	37	static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
	38
39d36536 MW	39	static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
	40	static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
	41	static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
	42	static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
	43	static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
	44	static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
	45
caba248d LL	46	static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
	47	static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
	48
b729bf34 MW	49	static bool lpss_dma_filter(struct dma_chan chan, void param)
	50	{
	51	struct dw_dma_slave *dws = param;
	52
	53	if (dws->dma_dev != chan->device->dev)
	54	return false;
	55
	56	chan->private = dws;
	57	return true;
	58	}
	59
d6ba32d5 CCE	60	static struct pxa_spi_info spi_info_configs[] = {
	61	[PORT_CE4100] = {
	62	.type = PXA25x_SSP,
	63	.port_id = -1,
	64	.num_chipselect = -1,
afa93c90	65	.max_clk_rate = 3686400,
d6ba32d5 CCE	66	},
d6ba32d5 CCE	67	[PORT_BYT] = {
03fbf488	68	.type = LPSS_BYT_SSP,
d6ba32d5 CCE	69	.port_id = 0,
d6ba32d5 CCE	70	.num_chipselect = 1,
afa93c90	71	.max_clk_rate = 50000000,
b729bf34 MW	72	.tx_param = &byt_tx_param,
b729bf34 MW	73	.rx_param = &byt_rx_param,
d6ba32d5	74	},
39d36536	75	[PORT_BSW0] = {
03fbf488	76	.type = LPSS_BYT_SSP,
39d36536 MW	77	.port_id = 0,
	78	.num_chipselect = 1,
	79	.max_clk_rate = 50000000,
	80	.tx_param = &bsw0_tx_param,
	81	.rx_param = &bsw0_rx_param,
	82	},
	83	[PORT_BSW1] = {
03fbf488	84	.type = LPSS_BYT_SSP,
39d36536 MW	85	.port_id = 1,
	86	.num_chipselect = 1,
	87	.max_clk_rate = 50000000,
	88	.tx_param = &bsw1_tx_param,
	89	.rx_param = &bsw1_rx_param,
	90	},
	91	[PORT_BSW2] = {
03fbf488	92	.type = LPSS_BYT_SSP,
39d36536 MW	93	.port_id = 2,
	94	.num_chipselect = 1,
	95	.max_clk_rate = 50000000,
	96	.tx_param = &bsw2_tx_param,
	97	.rx_param = &bsw2_rx_param,
d6ba32d5	98	},
e5262d05 WC	99	[PORT_QUARK_X1000] = {
	100	.type = QUARK_X1000_SSP,
	101	.port_id = -1,
	102	.num_chipselect = 1,
	103	.max_clk_rate = 50000000,
	104	},
caba248d LL	105	[PORT_LPT] = {
	106	.type = LPSS_LPT_SSP,
	107	.port_id = 0,
	108	.num_chipselect = 1,
	109	.max_clk_rate = 50000000,
	110	.tx_param = &lpt_tx_param,
	111	.rx_param = &lpt_rx_param,
	112	},
d6ba32d5 CCE	113	};
	114
	115	static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
d6ea3df0 SAS	116	const struct pci_device_id *ent)
d6ea3df0 SAS	117	{
0202775b	118	struct platform_device_info pi;
d6ea3df0	119	int ret;
d6ea3df0	120	struct platform_device *pdev;
0f3e1d27	121	struct pxa2xx_spi_master spi_pdata;
d6ea3df0	122	struct ssp_device *ssp;
d6ba32d5	123	struct pxa_spi_info *c;
afa93c90	124	char buf[40];
b729bf34	125	struct pci_dev *dma_dev;
d6ea3df0	126
0202775b	127	ret = pcim_enable_device(dev);
d6ea3df0 SAS	128	if (ret)
	129	return ret;
	130
0202775b	131	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
c1346340	132	if (ret)
d6ea3df0	133	return ret;
d6ea3df0	134
d6ba32d5 CCE	135	c = &spi_info_configs[ent->driver_data];
d6ba32d5 CCE	136
0f3e1d27	137	memset(&spi_pdata, 0, sizeof(spi_pdata));
d6ba32d5 CCE	138	spi_pdata.num_chipselect = (c->num_chipselect > 0) ?
d6ba32d5 CCE	139	c->num_chipselect : dev->devfn;
b729bf34 MW	140
	141	dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
	142
	143	if (c->tx_param) {
	144	struct dw_dma_slave *slave = c->tx_param;
	145
	146	slave->dma_dev = &dma_dev->dev;
	147	slave->src_master = 1;
	148	slave->dst_master = 0;
	149	}
	150
	151	if (c->rx_param) {
	152	struct dw_dma_slave *slave = c->rx_param;
	153
	154	slave->dma_dev = &dma_dev->dev;
	155	slave->src_master = 1;
	156	slave->dst_master = 0;
	157	}
	158
	159	spi_pdata.dma_filter = lpss_dma_filter;
	160	spi_pdata.tx_param = c->tx_param;
	161	spi_pdata.rx_param = c->rx_param;
	162	spi_pdata.enable_dma = c->rx_param && c->tx_param;
d6ea3df0	163
851bacf5	164	ssp = &spi_pdata.ssp;
d6ea3df0	165	ssp->phys_base = pci_resource_start(dev, 0);
0202775b	166	ssp->mmio_base = pcim_iomap_table(dev)[0];
d6ea3df0	167	if (!ssp->mmio_base) {
0202775b MW	168	dev_err(&dev->dev, "failed to ioremap() registers\n");
0202775b MW	169	return -EIO;
d6ea3df0 SAS	170	}
d6ea3df0 SAS	171	ssp->irq = dev->irq;
d6ba32d5 CCE	172	ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
d6ba32d5 CCE	173	ssp->type = c->type;
d6ea3df0	174
afa93c90 CCE	175	snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
	176	ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL,
	177	CLK_IS_ROOT, c->max_clk_rate);
	178	if (IS_ERR(ssp->clk))
	179	return PTR_ERR(ssp->clk);
	180
0202775b MW	181	memset(&pi, 0, sizeof(pi));
	182	pi.parent = &dev->dev;
	183	pi.name = "pxa2xx-spi";
	184	pi.id = ssp->port_id;
	185	pi.data = &spi_pdata;
	186	pi.size_data = sizeof(spi_pdata);
d6ea3df0	187
0202775b	188	pdev = platform_device_register_full(&pi);
afa93c90 CCE	189	if (IS_ERR(pdev)) {
afa93c90 CCE	190	clk_unregister(ssp->clk);
d77b5382	191	return PTR_ERR(pdev);
afa93c90	192	}
d6ea3df0	193
851bacf5	194	pci_set_drvdata(dev, pdev);
d6ea3df0	195
0202775b	196	return 0;
d6ea3df0 SAS	197	}
d6ea3df0 SAS	198
d6ba32d5	199	static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
d6ea3df0	200	{
851bacf5	201	struct platform_device *pdev = pci_get_drvdata(dev);
afa93c90 CCE	202	struct pxa2xx_spi_master *spi_pdata;
	203
	204	spi_pdata = dev_get_platdata(&pdev->dev);
d6ea3df0	205
851bacf5	206	platform_device_unregister(pdev);
afa93c90	207	clk_unregister(spi_pdata->ssp.clk);
d6ea3df0 SAS	208	}
d6ea3df0 SAS	209
d6ba32d5 CCE	210	static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
d6ba32d5 CCE	211	{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
e5262d05	212	{ PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
d6ba32d5	213	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
39d36536 MW	214	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
	215	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
	216	{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
caba248d	217	{ PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
d6ea3df0 SAS	218	{ },
d6ea3df0 SAS	219	};
d6ba32d5	220	MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
d6ea3df0	221
d6ba32d5 CCE	222	static struct pci_driver pxa2xx_spi_pci_driver = {
	223	.name = "pxa2xx_spi_pci",
	224	.id_table = pxa2xx_spi_pci_devices,
	225	.probe = pxa2xx_spi_pci_probe,
	226	.remove = pxa2xx_spi_pci_remove,
d6ea3df0 SAS	227	};
d6ea3df0 SAS	228
d6ba32d5	229	module_pci_driver(pxa2xx_spi_pci_driver);
d6ea3df0	230
d6ba32d5	231	MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
d6ea3df0 SAS	232	MODULE_LICENSE("GPL v2");
d6ea3df0 SAS	233	MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");