1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Renesas Technology Sales RTS7751R2D Support.
4  *
5  * Copyright (C) 2002 - 2006 Atom Create Engineering Co., Ltd.
6  * Copyright (C) 2004 - 2007 Paul Mundt
7  */
8 #include <linux/init.h>
9 #include <linux/platform_device.h>
10 #include <linux/mtd/mtd.h>
11 #include <linux/mtd/partitions.h>
12 #include <linux/mtd/physmap.h>
13 #include <linux/ata_platform.h>
14 #include <linux/sm501.h>
15 #include <linux/sm501-regs.h>
16 #include <linux/pm.h>
17 #include <linux/fb.h>
18 #include <linux/spi/spi.h>
19 #include <linux/spi/spi_bitbang.h>
20 #include <asm/machvec.h>
21 #include <mach/r2d.h>
22 #include <asm/io.h>
23 #include <asm/io_trapped.h>
24 #include <asm/spi.h>
25 
26 static struct resource cf_ide_resources[] = {
27 	[0] = {
28 		.start	= PA_AREA5_IO + 0x1000,
29 		.end	= PA_AREA5_IO + 0x1000 + 0x10 - 0x2,
30 		.flags	= IORESOURCE_MEM,
31 	},
32 	[1] = {
33 		.start	= PA_AREA5_IO + 0x80c,
34 		.end	= PA_AREA5_IO + 0x80c,
35 		.flags	= IORESOURCE_MEM,
36 	},
37 #ifndef CONFIG_RTS7751R2D_1 /* For R2D-1 polling is preferred */
38 	[2] = {
39 		.start	= IRQ_CF_IDE,
40 		.flags	= IORESOURCE_IRQ,
41 	},
42 #endif
43 };
44 
45 static struct pata_platform_info pata_info = {
46 	.ioport_shift	= 1,
47 };
48 
49 static struct platform_device cf_ide_device  = {
50 	.name		= "pata_platform",
51 	.id		= -1,
52 	.num_resources	= ARRAY_SIZE(cf_ide_resources),
53 	.resource	= cf_ide_resources,
54 	.dev	= {
55 		.platform_data	= &pata_info,
56 	},
57 };
58 
59 static struct spi_board_info spi_bus[] = {
60 	{
61 		.modalias	= "rtc-r9701",
62 		.max_speed_hz	= 1000000,
63 		.mode		= SPI_MODE_3,
64 	},
65 };
66 
r2d_chip_select(struct sh_spi_info * spi,int cs,int state)67 static void r2d_chip_select(struct sh_spi_info *spi, int cs, int state)
68 {
69 	BUG_ON(cs != 0);  /* Single Epson RTC-9701JE attached on CS0 */
70 	__raw_writew(state == BITBANG_CS_ACTIVE, PA_RTCCE);
71 }
72 
73 static struct sh_spi_info spi_info = {
74 	.num_chipselect = 1,
75 	.chip_select = r2d_chip_select,
76 };
77 
78 static struct resource spi_sh_sci_resources[] = {
79 	{
80 		.start	= 0xffe00000,
81 		.end	= 0xffe0001f,
82 		.flags	= IORESOURCE_MEM,
83 	},
84 };
85 
86 static struct platform_device spi_sh_sci_device  = {
87 	.name		= "spi_sh_sci",
88 	.id		= -1,
89 	.num_resources	= ARRAY_SIZE(spi_sh_sci_resources),
90 	.resource	= spi_sh_sci_resources,
91 	.dev	= {
92 		.platform_data	= &spi_info,
93 	},
94 };
95 
96 static struct resource heartbeat_resources[] = {
97 	[0] = {
98 		.start	= PA_OUTPORT,
99 		.end	= PA_OUTPORT,
100 		.flags	= IORESOURCE_MEM,
101 	},
102 };
103 
104 static struct platform_device heartbeat_device = {
105 	.name		= "heartbeat",
106 	.id		= -1,
107 	.num_resources	= ARRAY_SIZE(heartbeat_resources),
108 	.resource	= heartbeat_resources,
109 };
110 
111 static struct resource sm501_resources[] = {
112 	[0]	= {
113 		.start	= 0x10000000,
114 		.end	= 0x13e00000 - 1,
115 		.flags	= IORESOURCE_MEM,
116 	},
117 	[1]	= {
118 		.start	= 0x13e00000,
119 		.end	= 0x13ffffff,
120 		.flags	= IORESOURCE_MEM,
121 	},
122 	[2]	= {
123 		.start	= IRQ_VOYAGER,
124 		.flags	= IORESOURCE_IRQ,
125 	},
126 };
127 
128 static struct fb_videomode sm501_default_mode = {
129 	.pixclock	= 35714,
130 	.xres		= 640,
131 	.yres		= 480,
132 	.left_margin	= 105,
133 	.right_margin	= 50,
134 	.upper_margin	= 35,
135 	.lower_margin	= 0,
136 	.hsync_len	= 96,
137 	.vsync_len	= 2,
138 	.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
139 };
140 
141 static struct sm501_platdata_fbsub sm501_pdata_fbsub_pnl = {
142 	.def_bpp	= 16,
143 	.def_mode	= &sm501_default_mode,
144 	.flags		= SM501FB_FLAG_USE_INIT_MODE |
145 			  SM501FB_FLAG_USE_HWCURSOR |
146 			  SM501FB_FLAG_USE_HWACCEL |
147 			  SM501FB_FLAG_DISABLE_AT_EXIT,
148 };
149 
150 static struct sm501_platdata_fbsub sm501_pdata_fbsub_crt = {
151 	.flags		= (SM501FB_FLAG_USE_INIT_MODE |
152 			   SM501FB_FLAG_USE_HWCURSOR |
153 			   SM501FB_FLAG_USE_HWACCEL |
154 			   SM501FB_FLAG_DISABLE_AT_EXIT),
155 
156 };
157 
158 static struct sm501_platdata_fb sm501_fb_pdata = {
159 	.fb_route	= SM501_FB_OWN,
160 	.fb_crt		= &sm501_pdata_fbsub_crt,
161 	.fb_pnl		= &sm501_pdata_fbsub_pnl,
162 	.flags		= SM501_FBPD_SWAP_FB_ENDIAN,
163 };
164 
165 static struct sm501_initdata sm501_initdata = {
166 	.devices	= SM501_USE_USB_HOST | SM501_USE_UART0,
167 };
168 
169 static struct sm501_platdata sm501_platform_data = {
170 	.init		= &sm501_initdata,
171 	.fb		= &sm501_fb_pdata,
172 };
173 
174 static struct platform_device sm501_device = {
175 	.name		= "sm501",
176 	.id		= -1,
177 	.dev		= {
178 		.platform_data	= &sm501_platform_data,
179 	},
180 	.num_resources	= ARRAY_SIZE(sm501_resources),
181 	.resource	= sm501_resources,
182 };
183 
184 static struct mtd_partition r2d_partitions[] = {
185 	{
186 		.name		= "U-Boot",
187 		.offset		= 0x00000000,
188 		.size		= 0x00040000,
189 		.mask_flags	= MTD_WRITEABLE,
190 	}, {
191 		.name		= "Environment",
192 		.offset		= MTDPART_OFS_NXTBLK,
193 		.size		= 0x00040000,
194 		.mask_flags	= MTD_WRITEABLE,
195 	}, {
196 		.name		= "Kernel",
197 		.offset		= MTDPART_OFS_NXTBLK,
198 		.size		= 0x001c0000,
199 	}, {
200 		.name		= "Flash_FS",
201 		.offset		= MTDPART_OFS_NXTBLK,
202 		.size		= MTDPART_SIZ_FULL,
203 	}
204 };
205 
206 static struct physmap_flash_data flash_data = {
207 	.width		= 2,
208 	.nr_parts	= ARRAY_SIZE(r2d_partitions),
209 	.parts		= r2d_partitions,
210 };
211 
212 static struct resource flash_resource = {
213 	.start		= 0x00000000,
214 	.end		= 0x02000000,
215 	.flags		= IORESOURCE_MEM,
216 };
217 
218 static struct platform_device flash_device = {
219 	.name		= "physmap-flash",
220 	.id		= -1,
221 	.resource	= &flash_resource,
222 	.num_resources	= 1,
223 	.dev		= {
224 		.platform_data = &flash_data,
225 	},
226 };
227 
228 static struct platform_device *rts7751r2d_devices[] __initdata = {
229 	&sm501_device,
230 	&heartbeat_device,
231 	&spi_sh_sci_device,
232 };
233 
234 /*
235  * The CF is connected with a 16-bit bus where 8-bit operations are
236  * unsupported. The linux ata driver is however using 8-bit operations, so
237  * insert a trapped io filter to convert 8-bit operations into 16-bit.
238  */
239 static struct trapped_io cf_trapped_io = {
240 	.resource		= cf_ide_resources,
241 	.num_resources		= 2,
242 	.minimum_bus_width	= 16,
243 };
244 
rts7751r2d_devices_setup(void)245 static int __init rts7751r2d_devices_setup(void)
246 {
247 	if (register_trapped_io(&cf_trapped_io) == 0)
248 		platform_device_register(&cf_ide_device);
249 
250 	if (mach_is_r2d_plus())
251 		platform_device_register(&flash_device);
252 
253 	spi_register_board_info(spi_bus, ARRAY_SIZE(spi_bus));
254 
255 	return platform_add_devices(rts7751r2d_devices,
256 				    ARRAY_SIZE(rts7751r2d_devices));
257 }
258 device_initcall(rts7751r2d_devices_setup);
259 
rts7751r2d_power_off(void)260 static void rts7751r2d_power_off(void)
261 {
262 	__raw_writew(0x0001, PA_POWOFF);
263 }
264 
265 /*
266  * Initialize the board
267  */
rts7751r2d_setup(char ** cmdline_p)268 static void __init rts7751r2d_setup(char **cmdline_p)
269 {
270 	void __iomem *sm501_reg;
271 	u16 ver = __raw_readw(PA_VERREG);
272 
273 	printk(KERN_INFO "Renesas Technology Sales RTS7751R2D support.\n");
274 
275 	printk(KERN_INFO "FPGA version:%d (revision:%d)\n",
276 					(ver >> 4) & 0xf, ver & 0xf);
277 
278 	__raw_writew(0x0000, PA_OUTPORT);
279 	pm_power_off = rts7751r2d_power_off;
280 
281 	/* sm501 dram configuration:
282 	 * ColSizeX = 11 - External Memory Column Size: 256 words.
283 	 * APX = 1 - External Memory Active to Pre-Charge Delay: 7 clocks.
284 	 * RstX = 1 - External Memory Reset: Normal.
285 	 * Rfsh = 1 - Local Memory Refresh to Command Delay: 12 clocks.
286 	 * BwC =  1 - Local Memory Block Write Cycle Time: 2 clocks.
287 	 * BwP =  1 - Local Memory Block Write to Pre-Charge Delay: 1 clock.
288 	 * AP = 1 - Internal Memory Active to Pre-Charge Delay: 7 clocks.
289 	 * Rst = 1 - Internal Memory Reset: Normal.
290 	 * RA = 1 - Internal Memory Remain in Active State: Do not remain.
291 	 */
292 
293 	sm501_reg = (void __iomem *)0xb3e00000 + SM501_DRAM_CONTROL;
294 	writel(readl(sm501_reg) | 0x00f107c0, sm501_reg);
295 }
296 
297 /*
298  * The Machine Vector
299  */
300 static struct sh_machine_vector mv_rts7751r2d __initmv = {
301 	.mv_name		= "RTS7751R2D",
302 	.mv_setup		= rts7751r2d_setup,
303 	.mv_init_irq		= init_rts7751r2d_IRQ,
304 	.mv_irq_demux		= rts7751r2d_irq_demux,
305 };
306