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 void lpss_dma_put_device(void *dma_dev)
80 static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
82 struct pci_dev *dma_dev;
85 c->num_chipselect = 1;
86 c->max_clk_rate = 50000000;
88 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
89 ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
94 struct dw_dma_slave *slave = c->tx_param;
96 slave->dma_dev = &dma_dev->dev;
102 struct dw_dma_slave *slave = c->rx_param;
104 slave->dma_dev = &dma_dev->dev;
109 c->dma_filter = lpss_dma_filter;
113 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
115 struct dw_dma_slave *tx, *rx;
116 struct pci_dev *dma_dev;
119 switch (PCI_FUNC(dev->devfn)) {
122 c->num_chipselect = 1;
123 c->tx_param = &mrfld3_tx_param;
124 c->rx_param = &mrfld3_rx_param;
128 c->num_chipselect = 4;
129 c->tx_param = &mrfld5_tx_param;
130 c->rx_param = &mrfld5_rx_param;
134 c->num_chipselect = 1;
135 c->tx_param = &mrfld6_tx_param;
136 c->rx_param = &mrfld6_rx_param;
142 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
143 ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
148 tx->dma_dev = &dma_dev->dev;
151 rx->dma_dev = &dma_dev->dev;
153 c->dma_filter = lpss_dma_filter;
157 static struct pxa_spi_info spi_info_configs[] = {
161 .num_chipselect = -1,
162 .max_clk_rate = 3686400,
165 .type = LPSS_BYT_SSP,
167 .setup = lpss_spi_setup,
168 .tx_param = &byt_tx_param,
169 .rx_param = &byt_rx_param,
172 .type = LPSS_BSW_SSP,
174 .setup = lpss_spi_setup,
175 .tx_param = &bsw0_tx_param,
176 .rx_param = &bsw0_rx_param,
179 .type = LPSS_BSW_SSP,
181 .setup = lpss_spi_setup,
182 .tx_param = &bsw1_tx_param,
183 .rx_param = &bsw1_rx_param,
186 .type = LPSS_BSW_SSP,
188 .setup = lpss_spi_setup,
189 .tx_param = &bsw2_tx_param,
190 .rx_param = &bsw2_rx_param,
194 .max_clk_rate = 25000000,
195 .setup = mrfld_spi_setup,
197 [PORT_QUARK_X1000] = {
198 .type = QUARK_X1000_SSP,
201 .max_clk_rate = 50000000,
204 .type = LPSS_LPT_SSP,
206 .setup = lpss_spi_setup,
207 .tx_param = &lpt0_tx_param,
208 .rx_param = &lpt0_rx_param,
211 .type = LPSS_LPT_SSP,
213 .setup = lpss_spi_setup,
214 .tx_param = &lpt1_tx_param,
215 .rx_param = &lpt1_rx_param,
219 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
220 const struct pci_device_id *ent)
222 struct platform_device_info pi;
224 struct platform_device *pdev;
225 struct pxa2xx_spi_master spi_pdata;
226 struct ssp_device *ssp;
227 struct pxa_spi_info *c;
230 ret = pcim_enable_device(dev);
234 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
238 c = &spi_info_configs[ent->driver_data];
240 ret = c->setup(dev, c);
245 memset(&spi_pdata, 0, sizeof(spi_pdata));
246 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
247 spi_pdata.dma_filter = c->dma_filter;
248 spi_pdata.tx_param = c->tx_param;
249 spi_pdata.rx_param = c->rx_param;
250 spi_pdata.enable_dma = c->rx_param && c->tx_param;
252 ssp = &spi_pdata.ssp;
253 ssp->phys_base = pci_resource_start(dev, 0);
254 ssp->mmio_base = pcim_iomap_table(dev)[0];
255 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
260 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
263 ssp->irq = pci_irq_vector(dev, 0);
265 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
266 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
268 if (IS_ERR(ssp->clk))
269 return PTR_ERR(ssp->clk);
271 memset(&pi, 0, sizeof(pi));
272 pi.fwnode = dev->dev.fwnode;
273 pi.parent = &dev->dev;
274 pi.name = "pxa2xx-spi";
275 pi.id = ssp->port_id;
276 pi.data = &spi_pdata;
277 pi.size_data = sizeof(spi_pdata);
279 pdev = platform_device_register_full(&pi);
281 clk_unregister(ssp->clk);
282 return PTR_ERR(pdev);
285 pci_set_drvdata(dev, pdev);
290 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
292 struct platform_device *pdev = pci_get_drvdata(dev);
293 struct pxa2xx_spi_master *spi_pdata;
295 spi_pdata = dev_get_platdata(&pdev->dev);
297 platform_device_unregister(pdev);
298 clk_unregister(spi_pdata->ssp.clk);
301 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
302 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
303 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
304 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
305 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
306 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
307 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
308 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
309 { PCI_VDEVICE(INTEL, 0x9ce5), PORT_LPT0 },
310 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT1 },
313 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
315 static struct pci_driver pxa2xx_spi_pci_driver = {
316 .name = "pxa2xx_spi_pci",
317 .id_table = pxa2xx_spi_pci_devices,
318 .probe = pxa2xx_spi_pci_probe,
319 .remove = pxa2xx_spi_pci_remove,
322 module_pci_driver(pxa2xx_spi_pci_driver);
324 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
325 MODULE_LICENSE("GPL v2");
326 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");