1 // SPDX-License-Identifier: GPL-2.0-only
9  * Bosch CC770 and Intel AN82527 CAN controllers on the ISA or PC-104 bus.
32  * Note: for clk, cir, bcr and cor, the first argument re-defines the
42 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt  argument
61 MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the ISA bus");
72 static u8 cir[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
73 static u8 cor[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
74 static u8 bcr[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
75 static int indirect[MAXDEV] = {[0 ... (MAXDEV - 1)] = -1};
114 	return readb(priv->reg_base + reg);  in cc770_isa_mem_read_reg()
120 	writeb(val, priv->reg_base + reg);  in cc770_isa_mem_write_reg()
125 	return inb((unsigned long)priv->reg_base + reg);  in cc770_isa_port_read_reg()
131 	outb(val, (unsigned long)priv->reg_base + reg);  in cc770_isa_port_write_reg()
137 	unsigned long base = (unsigned long)priv->reg_base;  in cc770_isa_port_read_reg_indirect()
152 	unsigned long base = (unsigned long)priv->reg_base;  in cc770_isa_port_write_reg_indirect()
167 	int idx = pdev->id;  in cc770_isa_probe()
171 	dev_dbg(&pdev->dev, "probing idx=%d: port=%#lx, mem=%#lx, irq=%d\n",  in cc770_isa_probe()
175 			err = -EBUSY;  in cc770_isa_probe()
180 			err = -ENOMEM;  in cc770_isa_probe()
185 		    (indirect[idx] == -1 && indirect[0] > 0))  in cc770_isa_probe()
188 			err = -EBUSY;  in cc770_isa_probe()
195 		err = -ENOMEM;  in cc770_isa_probe()
200 	dev->irq = irq[idx];  in cc770_isa_probe()
201 	priv->irq_flags = IRQF_SHARED;  in cc770_isa_probe()
203 		priv->reg_base = base;  in cc770_isa_probe()
204 		dev->base_addr = mem[idx];  in cc770_isa_probe()
205 		priv->read_reg = cc770_isa_mem_read_reg;  in cc770_isa_probe()
206 		priv->write_reg = cc770_isa_mem_write_reg;  in cc770_isa_probe()
208 		priv->reg_base = (void __iomem *)port[idx];  in cc770_isa_probe()
209 		dev->base_addr = port[idx];  in cc770_isa_probe()
212 			priv->read_reg = cc770_isa_port_read_reg_indirect;  in cc770_isa_probe()
213 			priv->write_reg = cc770_isa_port_write_reg_indirect;  in cc770_isa_probe()
215 			priv->read_reg = cc770_isa_port_read_reg;  in cc770_isa_probe()
216 			priv->write_reg = cc770_isa_port_write_reg;  in cc770_isa_probe()
226 	priv->can.clock.freq = clktmp;  in cc770_isa_probe()
229 		priv->cpu_interface = cir[idx];  in cc770_isa_probe()
231 		priv->cpu_interface = cir[0];  in cc770_isa_probe()
235 			priv->cpu_interface |= CPUIF_DSC;  in cc770_isa_probe()
240 			priv->cpu_interface |= CPUIF_DMC;  in cc770_isa_probe()
243 	if (priv->cpu_interface & CPUIF_DSC)  in cc770_isa_probe()
244 		priv->can.clock.freq /= 2;  in cc770_isa_probe()
247 		priv->bus_config = bcr[idx];  in cc770_isa_probe()
249 		priv->bus_config = bcr[0];  in cc770_isa_probe()
251 		priv->bus_config = BCR_DEFAULT;  in cc770_isa_probe()
254 		priv->clkout = cor[idx];  in cc770_isa_probe()
256 		priv->clkout = cor[0];  in cc770_isa_probe()
258 		priv->clkout = COR_DEFAULT;  in cc770_isa_probe()
261 	SET_NETDEV_DEV(dev, &pdev->dev);  in cc770_isa_probe()
265 		dev_err(&pdev->dev,  in cc770_isa_probe()
270 	dev_info(&pdev->dev, "device registered (reg_base=0x%p, irq=%d)\n",  in cc770_isa_probe()
271 		 priv->reg_base, dev->irq);  in cc770_isa_probe()
292 	int idx = pdev->id;  in cc770_isa_remove()
297 		iounmap(priv->reg_base);  in cc770_isa_remove()
300 		if (priv->read_reg == cc770_isa_port_read_reg_indirect)  in cc770_isa_remove()
325 				err = -ENOMEM;  in cc770_isa_init()
338 			err = -EINVAL;  in cc770_isa_init()
352 	while (--idx >= 0) {  in cc770_isa_init()