1 // SPDX-License-Identifier: GPL-2.0-only
24 MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the ISA bus");
32 static unsigned long mem[MAXDEV];  variable
35 static unsigned char cdr[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
36 static unsigned char ocr[MAXDEV] = {[0 ... (MAXDEV - 1)] = 0xff};
37 static int indirect[MAXDEV] = {[0 ... (MAXDEV - 1)] = -1};
43 module_param_hw_array(mem, ulong, iomem, NULL, 0444);
44 MODULE_PARM_DESC(mem, "I/O memory address");
71 	return readb(priv->reg_base + reg);  in sja1000_isa_mem_read_reg()
77 	writeb(val, priv->reg_base + reg);  in sja1000_isa_mem_write_reg()
82 	return inb((unsigned long)priv->reg_base + reg);  in sja1000_isa_port_read_reg()
88 	outb(val, (unsigned long)priv->reg_base + reg);  in sja1000_isa_port_write_reg()
94 	unsigned long flags, base = (unsigned long)priv->reg_base;  in sja1000_isa_port_read_reg_indirect()  local
97 	spin_lock_irqsave(&indirect_lock[priv->dev->dev_id], flags);  in sja1000_isa_port_read_reg_indirect()
98 	outb(reg, base);  in sja1000_isa_port_read_reg_indirect()
99 	readval = inb(base + 1);  in sja1000_isa_port_read_reg_indirect()
100 	spin_unlock_irqrestore(&indirect_lock[priv->dev->dev_id], flags);  in sja1000_isa_port_read_reg_indirect()
108 	unsigned long flags, base = (unsigned long)priv->reg_base;  in sja1000_isa_port_write_reg_indirect()  local
110 	spin_lock_irqsave(&indirect_lock[priv->dev->dev_id], flags);  in sja1000_isa_port_write_reg_indirect()
111 	outb(reg, base);  in sja1000_isa_port_write_reg_indirect()
112 	outb(val, base + 1);  in sja1000_isa_port_write_reg_indirect()
113 	spin_unlock_irqrestore(&indirect_lock[priv->dev->dev_id], flags);  in sja1000_isa_port_write_reg_indirect()
120 	void __iomem *base = NULL;  in sja1000_isa_probe()  local
122 	int idx = pdev->id;  in sja1000_isa_probe()
125 	dev_dbg(&pdev->dev, "probing idx=%d: port=%#lx, mem=%#lx, irq=%d\n",  in sja1000_isa_probe()
126 		idx, port[idx], mem[idx], irq[idx]);  in sja1000_isa_probe()
128 	if (mem[idx]) {  in sja1000_isa_probe()
129 		if (!request_mem_region(mem[idx], iosize, DRV_NAME)) {  in sja1000_isa_probe()
130 			err = -EBUSY;  in sja1000_isa_probe()
133 		base = ioremap(mem[idx], iosize);  in sja1000_isa_probe()
134 		if (!base) {  in sja1000_isa_probe()
135 			err = -ENOMEM;  in sja1000_isa_probe()
140 		    (indirect[idx] == -1 && indirect[0] > 0))  in sja1000_isa_probe()
143 			err = -EBUSY;  in sja1000_isa_probe()
150 		err = -ENOMEM;  in sja1000_isa_probe()
155 	dev->irq = irq[idx];  in sja1000_isa_probe()
156 	priv->irq_flags = IRQF_SHARED;  in sja1000_isa_probe()
157 	if (mem[idx]) {  in sja1000_isa_probe()
158 		priv->reg_base = base;  in sja1000_isa_probe()
159 		dev->base_addr = mem[idx];  in sja1000_isa_probe()
160 		priv->read_reg = sja1000_isa_mem_read_reg;  in sja1000_isa_probe()
161 		priv->write_reg = sja1000_isa_mem_write_reg;  in sja1000_isa_probe()
163 		priv->reg_base = (void __iomem *)port[idx];  in sja1000_isa_probe()
164 		dev->base_addr = port[idx];  in sja1000_isa_probe()
167 			priv->read_reg = sja1000_isa_port_read_reg_indirect;  in sja1000_isa_probe()
168 			priv->write_reg = sja1000_isa_port_write_reg_indirect;  in sja1000_isa_probe()
171 			priv->read_reg = sja1000_isa_port_read_reg;  in sja1000_isa_probe()
172 			priv->write_reg = sja1000_isa_port_write_reg;  in sja1000_isa_probe()
177 		priv->can.clock.freq = clk[idx] / 2;  in sja1000_isa_probe()
179 		priv->can.clock.freq = clk[0] / 2;  in sja1000_isa_probe()
181 		priv->can.clock.freq = CLK_DEFAULT / 2;  in sja1000_isa_probe()
184 		priv->ocr = ocr[idx];  in sja1000_isa_probe()
186 		priv->ocr = ocr[0];  in sja1000_isa_probe()
188 		priv->ocr = OCR_DEFAULT;  in sja1000_isa_probe()
191 		priv->cdr = cdr[idx];  in sja1000_isa_probe()
193 		priv->cdr = cdr[0];  in sja1000_isa_probe()
195 		priv->cdr = CDR_DEFAULT;  in sja1000_isa_probe()
198 	SET_NETDEV_DEV(dev, &pdev->dev);  in sja1000_isa_probe()
199 	dev->dev_id = idx;  in sja1000_isa_probe()
203 		dev_err(&pdev->dev, "registering %s failed (err=%d)\n",  in sja1000_isa_probe()
208 	dev_info(&pdev->dev, "%s device registered (reg_base=0x%p, irq=%d)\n",  in sja1000_isa_probe()
209 		 DRV_NAME, priv->reg_base, dev->irq);  in sja1000_isa_probe()
215 	if (mem[idx])  in sja1000_isa_probe()
216 		iounmap(base);  in sja1000_isa_probe()
218 	if (mem[idx])  in sja1000_isa_probe()
219 		release_mem_region(mem[idx], iosize);  in sja1000_isa_probe()
230 	int idx = pdev->id;  in sja1000_isa_remove()
234 	if (mem[idx]) {  in sja1000_isa_remove()
235 		iounmap(priv->reg_base);  in sja1000_isa_remove()
236 		release_mem_region(mem[idx], SJA1000_IOSIZE);  in sja1000_isa_remove()
238 		if (priv->read_reg == sja1000_isa_port_read_reg_indirect)  in sja1000_isa_remove()
259 		if ((port[idx] || mem[idx]) && irq[idx]) {  in sja1000_isa_init()
263 				err = -ENOMEM;  in sja1000_isa_init()
271 			pr_debug("%s: platform device %d: port=%#lx, mem=%#lx, "  in sja1000_isa_init()
273 				 DRV_NAME, idx, port[idx], mem[idx], irq[idx]);  in sja1000_isa_init()
274 		} else if (idx == 0 || port[idx] || mem[idx]) {  in sja1000_isa_init()
277 				err = -EINVAL;  in sja1000_isa_init()
292 	while (--idx >= 0) {  in sja1000_isa_init()