2 * CE4100's SPI device is more or less the same one as found on PXA
4 * Copyright (C) 2016, Intel Corporation
6 #include <linux/clk-provider.h>
7 #include <linux/module.h>
8 #include <linux/of_device.h>
10 #include <linux/platform_device.h>
11 #include <linux/spi/pxa2xx_spi.h>
13 #include <linux/dmaengine.h>
14 #include <linux/platform_data/dma-dw.h>
29 enum pxa_ssp_type type;
32 unsigned long max_clk_rate;
34 /* DMA channel request parameters */
35 bool (*dma_filter)(struct dma_chan *chan, void *param);
39 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
42 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
43 static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
45 static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
46 static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
47 static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
48 static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
49 static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
50 static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
52 static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
53 static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
54 static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
55 static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
56 static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
57 static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
59 static struct dw_dma_slave lpt1_tx_param = { .dst_id = 0 };
60 static struct dw_dma_slave lpt1_rx_param = { .src_id = 1 };
61 static struct dw_dma_slave lpt0_tx_param = { .dst_id = 2 };
62 static struct dw_dma_slave lpt0_rx_param = { .src_id = 3 };
64 static bool lpss_dma_filter(struct dma_chan *chan, void *param)
66 struct dw_dma_slave *dws = param;
68 if (dws->dma_dev != chan->device->dev)
75 static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
77 struct pci_dev *dma_dev;
79 c->num_chipselect = 1;
80 c->max_clk_rate = 50000000;
82 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
85 struct dw_dma_slave *slave = c->tx_param;
87 slave->dma_dev = &dma_dev->dev;
93 struct dw_dma_slave *slave = c->rx_param;
95 slave->dma_dev = &dma_dev->dev;
100 c->dma_filter = lpss_dma_filter;
104 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
106 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
107 struct dw_dma_slave *tx, *rx;
109 switch (PCI_FUNC(dev->devfn)) {
112 c->num_chipselect = 1;
113 c->tx_param = &mrfld3_tx_param;
114 c->rx_param = &mrfld3_rx_param;
118 c->num_chipselect = 4;
119 c->tx_param = &mrfld5_tx_param;
120 c->rx_param = &mrfld5_rx_param;
124 c->num_chipselect = 1;
125 c->tx_param = &mrfld6_tx_param;
126 c->rx_param = &mrfld6_rx_param;
133 tx->dma_dev = &dma_dev->dev;
136 rx->dma_dev = &dma_dev->dev;
138 c->dma_filter = lpss_dma_filter;
142 static struct pxa_spi_info spi_info_configs[] = {
146 .num_chipselect = -1,
147 .max_clk_rate = 3686400,
150 .type = LPSS_BYT_SSP,
152 .setup = lpss_spi_setup,
153 .tx_param = &byt_tx_param,
154 .rx_param = &byt_rx_param,
157 .type = LPSS_BSW_SSP,
159 .setup = lpss_spi_setup,
160 .tx_param = &bsw0_tx_param,
161 .rx_param = &bsw0_rx_param,
164 .type = LPSS_BSW_SSP,
166 .setup = lpss_spi_setup,
167 .tx_param = &bsw1_tx_param,
168 .rx_param = &bsw1_rx_param,
171 .type = LPSS_BSW_SSP,
173 .setup = lpss_spi_setup,
174 .tx_param = &bsw2_tx_param,
175 .rx_param = &bsw2_rx_param,
179 .max_clk_rate = 25000000,
180 .setup = mrfld_spi_setup,
182 [PORT_QUARK_X1000] = {
183 .type = QUARK_X1000_SSP,
186 .max_clk_rate = 50000000,
189 .type = LPSS_LPT_SSP,
191 .setup = lpss_spi_setup,
192 .tx_param = &lpt0_tx_param,
193 .rx_param = &lpt0_rx_param,
196 .type = LPSS_LPT_SSP,
198 .setup = lpss_spi_setup,
199 .tx_param = &lpt1_tx_param,
200 .rx_param = &lpt1_rx_param,
204 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
205 const struct pci_device_id *ent)
207 struct platform_device_info pi;
209 struct platform_device *pdev;
210 struct pxa2xx_spi_master spi_pdata;
211 struct ssp_device *ssp;
212 struct pxa_spi_info *c;
215 ret = pcim_enable_device(dev);
219 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
223 c = &spi_info_configs[ent->driver_data];
225 ret = c->setup(dev, c);
230 memset(&spi_pdata, 0, sizeof(spi_pdata));
231 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
232 spi_pdata.dma_filter = c->dma_filter;
233 spi_pdata.tx_param = c->tx_param;
234 spi_pdata.rx_param = c->rx_param;
235 spi_pdata.enable_dma = c->rx_param && c->tx_param;
237 ssp = &spi_pdata.ssp;
238 ssp->phys_base = pci_resource_start(dev, 0);
239 ssp->mmio_base = pcim_iomap_table(dev)[0];
240 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
245 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
248 ssp->irq = pci_irq_vector(dev, 0);
250 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
251 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
253 if (IS_ERR(ssp->clk))
254 return PTR_ERR(ssp->clk);
256 memset(&pi, 0, sizeof(pi));
257 pi.fwnode = dev->dev.fwnode;
258 pi.parent = &dev->dev;
259 pi.name = "pxa2xx-spi";
260 pi.id = ssp->port_id;
261 pi.data = &spi_pdata;
262 pi.size_data = sizeof(spi_pdata);
264 pdev = platform_device_register_full(&pi);
266 clk_unregister(ssp->clk);
267 return PTR_ERR(pdev);
270 pci_set_drvdata(dev, pdev);
275 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
277 struct platform_device *pdev = pci_get_drvdata(dev);
278 struct pxa2xx_spi_master *spi_pdata;
280 spi_pdata = dev_get_platdata(&pdev->dev);
282 platform_device_unregister(pdev);
283 clk_unregister(spi_pdata->ssp.clk);
286 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
287 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
288 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
289 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
290 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
291 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
292 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
293 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
294 { PCI_VDEVICE(INTEL, 0x9ce5), PORT_LPT0 },
295 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT1 },
298 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
300 static struct pci_driver pxa2xx_spi_pci_driver = {
301 .name = "pxa2xx_spi_pci",
302 .id_table = pxa2xx_spi_pci_devices,
303 .probe = pxa2xx_spi_pci_probe,
304 .remove = pxa2xx_spi_pci_remove,
307 module_pci_driver(pxa2xx_spi_pci_driver);
309 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
310 MODULE_LICENSE("GPL v2");
311 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");