1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * RouterBoard 500 Platform devices
4 *
5 * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
6 * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
7 */
8 #include <linux/kernel.h>
9 #include <linux/export.h>
10 #include <linux/init.h>
11 #include <linux/ctype.h>
12 #include <linux/string.h>
13 #include <linux/platform_device.h>
14 #include <linux/mtd/platnand.h>
15 #include <linux/mtd/mtd.h>
16 #include <linux/gpio.h>
17 #include <linux/gpio/machine.h>
18 #include <linux/gpio_keys.h>
19 #include <linux/input.h>
20 #include <linux/serial_8250.h>
21
22 #include <asm/bootinfo.h>
23
24 #include <asm/mach-rc32434/rc32434.h>
25 #include <asm/mach-rc32434/dma.h>
26 #include <asm/mach-rc32434/dma_v.h>
27 #include <asm/mach-rc32434/eth.h>
28 #include <asm/mach-rc32434/rb.h>
29 #include <asm/mach-rc32434/integ.h>
30 #include <asm/mach-rc32434/gpio.h>
31 #include <asm/mach-rc32434/irq.h>
32
33 #define ETH0_RX_DMA_ADDR (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
34 #define ETH0_TX_DMA_ADDR (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
35
36 extern unsigned int idt_cpu_freq;
37
38 static struct mpmc_device dev3;
39
set_latch_u5(unsigned char or_mask,unsigned char nand_mask)40 void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
41 {
42 unsigned long flags;
43
44 spin_lock_irqsave(&dev3.lock, flags);
45
46 dev3.state = (dev3.state | or_mask) & ~nand_mask;
47 writeb(dev3.state, dev3.base);
48
49 spin_unlock_irqrestore(&dev3.lock, flags);
50 }
51 EXPORT_SYMBOL(set_latch_u5);
52
get_latch_u5(void)53 unsigned char get_latch_u5(void)
54 {
55 return dev3.state;
56 }
57 EXPORT_SYMBOL(get_latch_u5);
58
59 static struct resource korina_dev0_res[] = {
60 {
61 .name = "korina_regs",
62 .start = ETH0_BASE_ADDR,
63 .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
64 .flags = IORESOURCE_MEM,
65 }, {
66 .name = "korina_rx",
67 .start = ETH0_DMA_RX_IRQ,
68 .end = ETH0_DMA_RX_IRQ,
69 .flags = IORESOURCE_IRQ
70 }, {
71 .name = "korina_tx",
72 .start = ETH0_DMA_TX_IRQ,
73 .end = ETH0_DMA_TX_IRQ,
74 .flags = IORESOURCE_IRQ
75 }, {
76 .name = "korina_ovr",
77 .start = ETH0_RX_OVR_IRQ,
78 .end = ETH0_RX_OVR_IRQ,
79 .flags = IORESOURCE_IRQ
80 }, {
81 .name = "korina_und",
82 .start = ETH0_TX_UND_IRQ,
83 .end = ETH0_TX_UND_IRQ,
84 .flags = IORESOURCE_IRQ
85 }, {
86 .name = "korina_dma_rx",
87 .start = ETH0_RX_DMA_ADDR,
88 .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
89 .flags = IORESOURCE_MEM,
90 }, {
91 .name = "korina_dma_tx",
92 .start = ETH0_TX_DMA_ADDR,
93 .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
94 .flags = IORESOURCE_MEM,
95 }
96 };
97
98 static struct korina_device korina_dev0_data = {
99 .name = "korina0",
100 .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
101 };
102
103 static struct platform_device korina_dev0 = {
104 .id = -1,
105 .name = "korina",
106 .resource = korina_dev0_res,
107 .num_resources = ARRAY_SIZE(korina_dev0_res),
108 };
109
110 static struct resource cf_slot0_res[] = {
111 {
112 .name = "cf_membase",
113 .flags = IORESOURCE_MEM
114 }, {
115 .name = "cf_irq",
116 .start = (8 + 4 * 32 + CF_GPIO_NUM), /* 149 */
117 .end = (8 + 4 * 32 + CF_GPIO_NUM),
118 .flags = IORESOURCE_IRQ
119 }
120 };
121
122 static struct gpiod_lookup_table cf_slot0_gpio_table = {
123 .dev_id = "pata-rb532-cf",
124 .table = {
125 GPIO_LOOKUP("gpio0", CF_GPIO_NUM,
126 NULL, GPIO_ACTIVE_HIGH),
127 { },
128 },
129 };
130
131 static struct platform_device cf_slot0 = {
132 .id = -1,
133 .name = "pata-rb532-cf",
134 .resource = cf_slot0_res,
135 .num_resources = ARRAY_SIZE(cf_slot0_res),
136 };
137
138 /* Resources and device for NAND */
rb532_dev_ready(struct nand_chip * chip)139 static int rb532_dev_ready(struct nand_chip *chip)
140 {
141 return gpio_get_value(GPIO_RDY);
142 }
143
rb532_cmd_ctrl(struct nand_chip * chip,int cmd,unsigned int ctrl)144 static void rb532_cmd_ctrl(struct nand_chip *chip, int cmd, unsigned int ctrl)
145 {
146 unsigned char orbits, nandbits;
147
148 if (ctrl & NAND_CTRL_CHANGE) {
149 orbits = (ctrl & NAND_CLE) << 1;
150 orbits |= (ctrl & NAND_ALE) >> 1;
151
152 nandbits = (~ctrl & NAND_CLE) << 1;
153 nandbits |= (~ctrl & NAND_ALE) >> 1;
154
155 set_latch_u5(orbits, nandbits);
156 }
157 if (cmd != NAND_CMD_NONE)
158 writeb(cmd, chip->legacy.IO_ADDR_W);
159 }
160
161 static struct resource nand_slot0_res[] = {
162 [0] = {
163 .name = "nand_membase",
164 .flags = IORESOURCE_MEM
165 }
166 };
167
168 static struct platform_nand_data rb532_nand_data = {
169 .ctrl.dev_ready = rb532_dev_ready,
170 .ctrl.cmd_ctrl = rb532_cmd_ctrl,
171 };
172
173 static struct platform_device nand_slot0 = {
174 .name = "gen_nand",
175 .id = -1,
176 .resource = nand_slot0_res,
177 .num_resources = ARRAY_SIZE(nand_slot0_res),
178 .dev.platform_data = &rb532_nand_data,
179 };
180
181 static struct mtd_partition rb532_partition_info[] = {
182 {
183 .name = "Routerboard NAND boot",
184 .offset = 0,
185 .size = 4 * 1024 * 1024,
186 }, {
187 .name = "rootfs",
188 .offset = MTDPART_OFS_NXTBLK,
189 .size = MTDPART_SIZ_FULL,
190 }
191 };
192
193 static struct platform_device rb532_led = {
194 .name = "rb532-led",
195 .id = -1,
196 };
197
198 static struct platform_device rb532_button = {
199 .name = "rb532-button",
200 .id = -1,
201 };
202
203 static struct resource rb532_wdt_res[] = {
204 {
205 .name = "rb532_wdt_res",
206 .start = INTEG0_BASE_ADDR,
207 .end = INTEG0_BASE_ADDR + sizeof(struct integ),
208 .flags = IORESOURCE_MEM,
209 }
210 };
211
212 static struct platform_device rb532_wdt = {
213 .name = "rc32434_wdt",
214 .id = -1,
215 .resource = rb532_wdt_res,
216 .num_resources = ARRAY_SIZE(rb532_wdt_res),
217 };
218
219 static struct plat_serial8250_port rb532_uart_res[] = {
220 {
221 .type = PORT_16550A,
222 .membase = (char *)KSEG1ADDR(REGBASE + UART0BASE),
223 .irq = UART0_IRQ,
224 .regshift = 2,
225 .iotype = UPIO_MEM,
226 .flags = UPF_BOOT_AUTOCONF,
227 },
228 {
229 .flags = 0,
230 }
231 };
232
233 static struct platform_device rb532_uart = {
234 .name = "serial8250",
235 .id = PLAT8250_DEV_PLATFORM,
236 .dev.platform_data = &rb532_uart_res,
237 };
238
239 static struct platform_device *rb532_devs[] = {
240 &korina_dev0,
241 &nand_slot0,
242 &cf_slot0,
243 &rb532_led,
244 &rb532_button,
245 &rb532_uart,
246 &rb532_wdt
247 };
248
249 /* NAND definitions */
250 #define NAND_CHIP_DELAY 25
251
rb532_nand_setup(void)252 static void __init rb532_nand_setup(void)
253 {
254 switch (mips_machtype) {
255 case MACH_MIKROTIK_RB532A:
256 set_latch_u5(LO_FOFF | LO_CEX,
257 LO_ULED | LO_ALE | LO_CLE | LO_WPX);
258 break;
259 default:
260 set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
261 LO_ULED | LO_ALE | LO_CLE);
262 break;
263 }
264
265 /* Setup NAND specific settings */
266 rb532_nand_data.chip.nr_chips = 1;
267 rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
268 rb532_nand_data.chip.partitions = rb532_partition_info;
269 rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
270 }
271
272
plat_setup_devices(void)273 static int __init plat_setup_devices(void)
274 {
275 /* Look for the CF card reader */
276 if (!readl(IDT434_REG_BASE + DEV1MASK))
277 rb532_devs[2] = NULL; /* disable cf_slot0 at index 2 */
278 else {
279 cf_slot0_res[0].start =
280 readl(IDT434_REG_BASE + DEV1BASE);
281 cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
282 }
283
284 /* Read the NAND resources from the device controller */
285 nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
286 nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
287
288 /* Read and map device controller 3 */
289 dev3.base = ioremap(readl(IDT434_REG_BASE + DEV3BASE), 1);
290
291 if (!dev3.base) {
292 printk(KERN_ERR "rb532: cannot remap device controller 3\n");
293 return -ENXIO;
294 }
295
296 /* Initialise the NAND device */
297 rb532_nand_setup();
298
299 /* set the uart clock to the current cpu frequency */
300 rb532_uart_res[0].uartclk = idt_cpu_freq;
301
302 dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
303
304 gpiod_add_lookup_table(&cf_slot0_gpio_table);
305 return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
306 }
307
308 #ifdef CONFIG_NET
309
setup_kmac(char * s)310 static int __init setup_kmac(char *s)
311 {
312 printk(KERN_INFO "korina mac = %s\n", s);
313 if (!mac_pton(s, korina_dev0_data.mac)) {
314 printk(KERN_ERR "Invalid mac\n");
315 return -EINVAL;
316 }
317 return 0;
318 }
319
320 __setup("kmac=", setup_kmac);
321
322 #endif /* CONFIG_NET */
323
324 arch_initcall(plat_setup_devices);
325
