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>
9 #include <linux/platform_device.h>
10 #include <linux/spi/pxa2xx_spi.h>
12 #include <linux/dmaengine.h>
13 #include <linux/platform_data/dma-dw.h>
27 enum pxa_ssp_type type;
30 unsigned long max_clk_rate;
32 /* DMA channel request parameters */
33 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 lpt_tx_param = { .dst_id = 0 };
60 static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
62 static bool lpss_dma_filter(struct dma_chan *chan, void *param)
64 struct dw_dma_slave *dws = param;
66 if (dws->dma_dev != chan->device->dev)
73 static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
75 struct pci_dev *dma_dev;
77 c->num_chipselect = 1;
78 c->max_clk_rate = 50000000;
80 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
83 struct dw_dma_slave *slave = c->tx_param;
85 slave->dma_dev = &dma_dev->dev;
91 struct dw_dma_slave *slave = c->rx_param;
93 slave->dma_dev = &dma_dev->dev;
98 c->dma_filter = lpss_dma_filter;
102 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
104 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
105 struct dw_dma_slave *tx, *rx;
107 switch (PCI_FUNC(dev->devfn)) {
110 c->num_chipselect = 1;
111 c->tx_param = &mrfld3_tx_param;
112 c->rx_param = &mrfld3_rx_param;
116 c->num_chipselect = 4;
117 c->tx_param = &mrfld5_tx_param;
118 c->rx_param = &mrfld5_rx_param;
122 c->num_chipselect = 1;
123 c->tx_param = &mrfld6_tx_param;
124 c->rx_param = &mrfld6_rx_param;
131 tx->dma_dev = &dma_dev->dev;
134 rx->dma_dev = &dma_dev->dev;
136 c->dma_filter = lpss_dma_filter;
137 c->dma_burst_size = 8;
141 static struct pxa_spi_info spi_info_configs[] = {
145 .num_chipselect = -1,
146 .max_clk_rate = 3686400,
149 .type = LPSS_BYT_SSP,
151 .setup = lpss_spi_setup,
152 .tx_param = &byt_tx_param,
153 .rx_param = &byt_rx_param,
156 .type = LPSS_BSW_SSP,
158 .setup = lpss_spi_setup,
159 .tx_param = &bsw0_tx_param,
160 .rx_param = &bsw0_rx_param,
163 .type = LPSS_BSW_SSP,
165 .setup = lpss_spi_setup,
166 .tx_param = &bsw1_tx_param,
167 .rx_param = &bsw1_rx_param,
170 .type = LPSS_BSW_SSP,
172 .setup = lpss_spi_setup,
173 .tx_param = &bsw2_tx_param,
174 .rx_param = &bsw2_rx_param,
178 .max_clk_rate = 25000000,
179 .setup = mrfld_spi_setup,
181 [PORT_QUARK_X1000] = {
182 .type = QUARK_X1000_SSP,
185 .max_clk_rate = 50000000,
188 .type = LPSS_LPT_SSP,
190 .setup = lpss_spi_setup,
191 .tx_param = &lpt_tx_param,
192 .rx_param = &lpt_rx_param,
196 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
197 const struct pci_device_id *ent)
199 struct platform_device_info pi;
201 struct platform_device *pdev;
202 struct pxa2xx_spi_controller spi_pdata;
203 struct ssp_device *ssp;
204 struct pxa_spi_info *c;
207 ret = pcim_enable_device(dev);
211 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
215 c = &spi_info_configs[ent->driver_data];
217 ret = c->setup(dev, c);
222 memset(&spi_pdata, 0, sizeof(spi_pdata));
223 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
224 spi_pdata.dma_filter = c->dma_filter;
225 spi_pdata.tx_param = c->tx_param;
226 spi_pdata.rx_param = c->rx_param;
227 spi_pdata.enable_dma = c->rx_param && c->tx_param;
228 spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;
230 ssp = &spi_pdata.ssp;
231 ssp->phys_base = pci_resource_start(dev, 0);
232 ssp->mmio_base = pcim_iomap_table(dev)[0];
233 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
238 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
241 ssp->irq = pci_irq_vector(dev, 0);
243 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
244 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
246 if (IS_ERR(ssp->clk))
247 return PTR_ERR(ssp->clk);
249 memset(&pi, 0, sizeof(pi));
250 pi.fwnode = dev->dev.fwnode;
251 pi.parent = &dev->dev;
252 pi.name = "pxa2xx-spi";
253 pi.id = ssp->port_id;
254 pi.data = &spi_pdata;
255 pi.size_data = sizeof(spi_pdata);
257 pdev = platform_device_register_full(&pi);
259 clk_unregister(ssp->clk);
260 return PTR_ERR(pdev);
263 pci_set_drvdata(dev, pdev);
268 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
270 struct platform_device *pdev = pci_get_drvdata(dev);
271 struct pxa2xx_spi_controller *spi_pdata;
273 spi_pdata = dev_get_platdata(&pdev->dev);
275 platform_device_unregister(pdev);
276 clk_unregister(spi_pdata->ssp.clk);
279 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
280 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
281 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
282 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
283 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
284 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
285 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
286 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
287 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
290 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
292 static struct pci_driver pxa2xx_spi_pci_driver = {
293 .name = "pxa2xx_spi_pci",
294 .id_table = pxa2xx_spi_pci_devices,
295 .probe = pxa2xx_spi_pci_probe,
296 .remove = pxa2xx_spi_pci_remove,
299 module_pci_driver(pxa2xx_spi_pci_driver);
301 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
302 MODULE_LICENSE("GPL v2");
303 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");