1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * devoard misc stuff.
4  */
5 
6 #include <linux/init.h>
7 #include <linux/mtd/mtd.h>
8 #include <linux/mtd/map.h>
9 #include <linux/mtd/physmap.h>
10 #include <linux/slab.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm.h>
13 
14 #include <asm/bootinfo.h>
15 #include <asm/idle.h>
16 #include <asm/reboot.h>
17 #include <asm/setup.h>
18 #include <asm/mach-au1x00/au1000.h>
19 #include <asm/mach-db1x00/bcsr.h>
20 
21 #include <prom.h>
22 
prom_putchar(char c)23 void prom_putchar(char c)
24 {
25 	if (alchemy_get_cputype() == ALCHEMY_CPU_AU1300)
26 		alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
27 	else
28 		alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
29 }
30 
31 
32 static struct platform_device db1x00_rtc_dev = {
33 	.name	= "rtc-au1xxx",
34 	.id	= -1,
35 };
36 
37 
db1x_power_off(void)38 static void db1x_power_off(void)
39 {
40 	bcsr_write(BCSR_RESETS, 0);
41 	bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);
42 	while (1)		/* sit and spin */
43 		cpu_wait();
44 }
45 
db1x_reset(char * c)46 static void db1x_reset(char *c)
47 {
48 	bcsr_write(BCSR_RESETS, 0);
49 	bcsr_write(BCSR_SYSTEM, 0);
50 }
51 
db1x_late_setup(void)52 static int __init db1x_late_setup(void)
53 {
54 	if (!pm_power_off)
55 		pm_power_off = db1x_power_off;
56 	if (!_machine_halt)
57 		_machine_halt = db1x_power_off;
58 	if (!_machine_restart)
59 		_machine_restart = db1x_reset;
60 
61 	platform_device_register(&db1x00_rtc_dev);
62 
63 	return 0;
64 }
65 device_initcall(db1x_late_setup);
66 
67 /* register a pcmcia socket */
db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start,phys_addr_t pcmcia_attr_end,phys_addr_t pcmcia_mem_start,phys_addr_t pcmcia_mem_end,phys_addr_t pcmcia_io_start,phys_addr_t pcmcia_io_end,int card_irq,int cd_irq,int stschg_irq,int eject_irq,int id)68 int __init db1x_register_pcmcia_socket(phys_addr_t pcmcia_attr_start,
69 				       phys_addr_t pcmcia_attr_end,
70 				       phys_addr_t pcmcia_mem_start,
71 				       phys_addr_t pcmcia_mem_end,
72 				       phys_addr_t pcmcia_io_start,
73 				       phys_addr_t pcmcia_io_end,
74 				       int card_irq,
75 				       int cd_irq,
76 				       int stschg_irq,
77 				       int eject_irq,
78 				       int id)
79 {
80 	int cnt, i, ret;
81 	struct resource *sr;
82 	struct platform_device *pd;
83 
84 	cnt = 5;
85 	if (eject_irq)
86 		cnt++;
87 	if (stschg_irq)
88 		cnt++;
89 
90 	sr = kcalloc(cnt, sizeof(struct resource), GFP_KERNEL);
91 	if (!sr)
92 		return -ENOMEM;
93 
94 	pd = platform_device_alloc("db1xxx_pcmcia", id);
95 	if (!pd) {
96 		ret = -ENOMEM;
97 		goto out;
98 	}
99 
100 	sr[0].name	= "pcmcia-attr";
101 	sr[0].flags	= IORESOURCE_MEM;
102 	sr[0].start	= pcmcia_attr_start;
103 	sr[0].end	= pcmcia_attr_end;
104 
105 	sr[1].name	= "pcmcia-mem";
106 	sr[1].flags	= IORESOURCE_MEM;
107 	sr[1].start	= pcmcia_mem_start;
108 	sr[1].end	= pcmcia_mem_end;
109 
110 	sr[2].name	= "pcmcia-io";
111 	sr[2].flags	= IORESOURCE_MEM;
112 	sr[2].start	= pcmcia_io_start;
113 	sr[2].end	= pcmcia_io_end;
114 
115 	sr[3].name	= "insert";
116 	sr[3].flags	= IORESOURCE_IRQ;
117 	sr[3].start = sr[3].end = cd_irq;
118 
119 	sr[4].name	= "card";
120 	sr[4].flags	= IORESOURCE_IRQ;
121 	sr[4].start = sr[4].end = card_irq;
122 
123 	i = 5;
124 	if (stschg_irq) {
125 		sr[i].name	= "stschg";
126 		sr[i].flags	= IORESOURCE_IRQ;
127 		sr[i].start = sr[i].end = stschg_irq;
128 		i++;
129 	}
130 	if (eject_irq) {
131 		sr[i].name	= "eject";
132 		sr[i].flags	= IORESOURCE_IRQ;
133 		sr[i].start = sr[i].end = eject_irq;
134 	}
135 
136 	pd->resource = sr;
137 	pd->num_resources = cnt;
138 
139 	ret = platform_device_add(pd);
140 	if (!ret)
141 		return 0;
142 
143 	platform_device_put(pd);
144 out:
145 	kfree(sr);
146 	return ret;
147 }
148 
149 #define YAMON_SIZE	0x00100000
150 #define YAMON_ENV_SIZE	0x00040000
151 
db1x_register_norflash(unsigned long size,int width,int swapped)152 int __init db1x_register_norflash(unsigned long size, int width,
153 				  int swapped)
154 {
155 	struct physmap_flash_data *pfd;
156 	struct platform_device *pd;
157 	struct mtd_partition *parts;
158 	struct resource *res;
159 	int ret, i;
160 
161 	if (size < (8 * 1024 * 1024))
162 		return -EINVAL;
163 
164 	ret = -ENOMEM;
165 	parts = kcalloc(5, sizeof(struct mtd_partition), GFP_KERNEL);
166 	if (!parts)
167 		goto out;
168 
169 	res = kzalloc(sizeof(struct resource), GFP_KERNEL);
170 	if (!res)
171 		goto out1;
172 
173 	pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL);
174 	if (!pfd)
175 		goto out2;
176 
177 	pd = platform_device_alloc("physmap-flash", 0);
178 	if (!pd)
179 		goto out3;
180 
181 	/* NOR flash ends at 0x20000000, regardless of size */
182 	res->start = 0x20000000 - size;
183 	res->end = 0x20000000 - 1;
184 	res->flags = IORESOURCE_MEM;
185 
186 	/* partition setup.  Most Develboards have a switch which allows
187 	 * to swap the physical locations of the 2 NOR flash banks.
188 	 */
189 	i = 0;
190 	if (!swapped) {
191 		/* first NOR chip */
192 		parts[i].offset = 0;
193 		parts[i].name = "User FS";
194 		parts[i].size = size / 2;
195 		i++;
196 	}
197 
198 	parts[i].offset = MTDPART_OFS_APPEND;
199 	parts[i].name = "User FS 2";
200 	parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000);
201 	i++;
202 
203 	parts[i].offset = MTDPART_OFS_APPEND;
204 	parts[i].name = "YAMON";
205 	parts[i].size = YAMON_SIZE;
206 	parts[i].mask_flags = MTD_WRITEABLE;
207 	i++;
208 
209 	parts[i].offset = MTDPART_OFS_APPEND;
210 	parts[i].name = "raw kernel";
211 	parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE;
212 	i++;
213 
214 	parts[i].offset = MTDPART_OFS_APPEND;
215 	parts[i].name = "YAMON Env";
216 	parts[i].size = YAMON_ENV_SIZE;
217 	parts[i].mask_flags = MTD_WRITEABLE;
218 	i++;
219 
220 	if (swapped) {
221 		parts[i].offset = MTDPART_OFS_APPEND;
222 		parts[i].name = "User FS";
223 		parts[i].size = size / 2;
224 		i++;
225 	}
226 
227 	pfd->width = width;
228 	pfd->parts = parts;
229 	pfd->nr_parts = 5;
230 
231 	pd->dev.platform_data = pfd;
232 	pd->resource = res;
233 	pd->num_resources = 1;
234 
235 	ret = platform_device_add(pd);
236 	if (!ret)
237 		return ret;
238 
239 	platform_device_put(pd);
240 out3:
241 	kfree(pfd);
242 out2:
243 	kfree(res);
244 out1:
245 	kfree(parts);
246 out:
247 	return ret;
248 }
249