1 // SPDX-License-Identifier: GPL-2.0-only
3  * PCI glue driver for SPI PXA2xx compatible controllers.
4  * CE4100's SPI device is more or less the same one as found on PXA.
8 #include <linux/clk-provider.h>
13 #include <linux/spi/pxa2xx_spi.h>
16 #include <linux/platform_data/dma-dw.h>
72 	if (dws->dma_dev != chan->device->dev)  in lpss_dma_filter()
75 	chan->private = dws;  in lpss_dma_filter()
83 	c->num_chipselect = 1;  in lpss_spi_setup()
84 	c->max_clk_rate = 50000000;  in lpss_spi_setup()
86 	dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));  in lpss_spi_setup()
88 	if (c->tx_param) {  in lpss_spi_setup()
89 		struct dw_dma_slave *slave = c->tx_param;  in lpss_spi_setup()  local
91 		slave->dma_dev = &dma_dev->dev;  in lpss_spi_setup()
92 		slave->m_master = 0;  in lpss_spi_setup()
93 		slave->p_master = 1;  in lpss_spi_setup()
96 	if (c->rx_param) {  in lpss_spi_setup()
97 		struct dw_dma_slave *slave = c->rx_param;  in lpss_spi_setup()  local
99 		slave->dma_dev = &dma_dev->dev;  in lpss_spi_setup()
100 		slave->m_master = 0;  in lpss_spi_setup()
101 		slave->p_master = 1;  in lpss_spi_setup()
104 	c->dma_filter = lpss_dma_filter;  in lpss_spi_setup()
110 	struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));  in mrfld_spi_setup()
113 	switch (PCI_FUNC(dev->devfn)) {  in mrfld_spi_setup()
115 		c->port_id = 3;  in mrfld_spi_setup()
116 		c->num_chipselect = 1;  in mrfld_spi_setup()
117 		c->tx_param = &mrfld3_tx_param;  in mrfld_spi_setup()
118 		c->rx_param = &mrfld3_rx_param;  in mrfld_spi_setup()
121 		c->port_id = 5;  in mrfld_spi_setup()
122 		c->num_chipselect = 4;  in mrfld_spi_setup()
123 		c->tx_param = &mrfld5_tx_param;  in mrfld_spi_setup()
124 		c->rx_param = &mrfld5_rx_param;  in mrfld_spi_setup()
127 		c->port_id = 6;  in mrfld_spi_setup()
128 		c->num_chipselect = 1;  in mrfld_spi_setup()
129 		c->tx_param = &mrfld6_tx_param;  in mrfld_spi_setup()
130 		c->rx_param = &mrfld6_rx_param;  in mrfld_spi_setup()
133 		return -ENODEV;  in mrfld_spi_setup()
136 	tx = c->tx_param;  in mrfld_spi_setup()
137 	tx->dma_dev = &dma_dev->dev;  in mrfld_spi_setup()
139 	rx = c->rx_param;  in mrfld_spi_setup()
140 	rx->dma_dev = &dma_dev->dev;  in mrfld_spi_setup()
142 	c->dma_filter = lpss_dma_filter;  in mrfld_spi_setup()
143 	c->dma_burst_size = 8;  in mrfld_spi_setup()
150 		.port_id =  -1,
151 		.num_chipselect = -1,
189 		.port_id = -1,
224 	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");  in pxa2xx_spi_pci_probe()
228 	c = &spi_info_configs[ent->driver_data];  in pxa2xx_spi_pci_probe()
229 	if (c->setup) {  in pxa2xx_spi_pci_probe()
230 		ret = c->setup(dev, c);  in pxa2xx_spi_pci_probe()
236 	spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;  in pxa2xx_spi_pci_probe()
237 	spi_pdata.dma_filter = c->dma_filter;  in pxa2xx_spi_pci_probe()
238 	spi_pdata.tx_param = c->tx_param;  in pxa2xx_spi_pci_probe()
239 	spi_pdata.rx_param = c->rx_param;  in pxa2xx_spi_pci_probe()
240 	spi_pdata.enable_dma = c->rx_param && c->tx_param;  in pxa2xx_spi_pci_probe()
241 	spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;  in pxa2xx_spi_pci_probe()
244 	ssp->dev = &dev->dev;  in pxa2xx_spi_pci_probe()
245 	ssp->phys_base = pci_resource_start(dev, 0);  in pxa2xx_spi_pci_probe()
246 	ssp->mmio_base = pcim_iomap_table(dev)[0];  in pxa2xx_spi_pci_probe()
247 	ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;  in pxa2xx_spi_pci_probe()
248 	ssp->type = c->type;  in pxa2xx_spi_pci_probe()
255 	ssp->irq = pci_irq_vector(dev, 0);  in pxa2xx_spi_pci_probe()
257 	snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);  in pxa2xx_spi_pci_probe()
258 	ssp->clk = clk_register_fixed_rate(&dev->dev, buf, NULL, 0,  in pxa2xx_spi_pci_probe()
259 					   c->max_clk_rate);  in pxa2xx_spi_pci_probe()
260 	if (IS_ERR(ssp->clk))  in pxa2xx_spi_pci_probe()
261 		return PTR_ERR(ssp->clk);  in pxa2xx_spi_pci_probe()
264 	pi.fwnode = dev->dev.fwnode;  in pxa2xx_spi_pci_probe()
265 	pi.parent = &dev->dev;  in pxa2xx_spi_pci_probe()
266 	pi.name = "pxa2xx-spi";  in pxa2xx_spi_pci_probe()
267 	pi.id = ssp->port_id;  in pxa2xx_spi_pci_probe()
273 		clk_unregister(ssp->clk);  in pxa2xx_spi_pci_probe()
287 	spi_pdata = dev_get_platdata(&pdev->dev);  in pxa2xx_spi_pci_remove()
290 	clk_unregister(spi_pdata->ssp.clk);  in pxa2xx_spi_pci_remove()
318 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");