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3d50527b MR |
1 | /* |
2 | * Support for CompuLab EM-x270 platform | |
3 | * | |
4 | * Copyright (C) 2007 CompuLab, Ltd. | |
5 | * Author: Mike Rapoport <mike@compulab.co.il> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/irq.h> | |
13 | #include <linux/platform_device.h> | |
14 | ||
15 | #include <linux/dm9000.h> | |
16 | #include <linux/rtc-v3020.h> | |
17 | ||
18 | #include <linux/mtd/nand.h> | |
19 | #include <linux/mtd/partitions.h> | |
20 | ||
21 | #include <asm/mach-types.h> | |
22 | ||
23 | #include <asm/mach/arch.h> | |
24 | ||
25 | #include <asm/arch/pxa-regs.h> | |
26 | #include <asm/arch/pxafb.h> | |
27 | #include <asm/arch/ohci.h> | |
28 | #include <asm/arch/mmc.h> | |
29 | #include <asm/arch/bitfield.h> | |
30 | ||
31 | #include "generic.h" | |
32 | ||
33 | /* GPIO IRQ usage */ | |
34 | #define EM_X270_MMC_PD (105) | |
35 | #define EM_X270_ETHIRQ IRQ_GPIO(41) | |
36 | #define EM_X270_MMC_IRQ IRQ_GPIO(13) | |
37 | ||
38 | static struct resource em_x270_dm9k_resource[] = { | |
39 | [0] = { | |
40 | .start = PXA_CS2_PHYS, | |
41 | .end = PXA_CS2_PHYS + 3, | |
42 | .flags = IORESOURCE_MEM, | |
43 | }, | |
44 | [1] = { | |
45 | .start = PXA_CS2_PHYS + 8, | |
46 | .end = PXA_CS2_PHYS + 8 + 0x3f, | |
47 | .flags = IORESOURCE_MEM, | |
48 | }, | |
49 | [2] = { | |
50 | .start = EM_X270_ETHIRQ, | |
51 | .end = EM_X270_ETHIRQ, | |
52 | .flags = IORESOURCE_IRQ, | |
53 | } | |
54 | }; | |
55 | ||
56 | /* for the moment we limit ourselves to 32bit IO until some | |
57 | * better IO routines can be written and tested | |
58 | */ | |
59 | static struct dm9000_plat_data em_x270_dm9k_platdata = { | |
60 | .flags = DM9000_PLATF_32BITONLY, | |
61 | }; | |
62 | ||
63 | /* Ethernet device */ | |
64 | static struct platform_device em_x270_dm9k = { | |
65 | .name = "dm9000", | |
66 | .id = 0, | |
67 | .num_resources = ARRAY_SIZE(em_x270_dm9k_resource), | |
68 | .resource = em_x270_dm9k_resource, | |
69 | .dev = { | |
70 | .platform_data = &em_x270_dm9k_platdata, | |
71 | } | |
72 | }; | |
73 | ||
74 | /* audio device */ | |
75 | static struct platform_device em_x270_audio = { | |
76 | .name = "pxa2xx-ac97", | |
77 | .id = -1, | |
78 | }; | |
79 | ||
80 | /* WM9712 touchscreen controller. Hopefully the driver will make it to | |
81 | * the mainstream sometime */ | |
82 | static struct platform_device em_x270_ts = { | |
83 | .name = "wm97xx-ts", | |
84 | .id = -1, | |
85 | }; | |
86 | ||
87 | /* RTC */ | |
88 | static struct resource em_x270_v3020_resource[] = { | |
89 | [0] = { | |
90 | .start = PXA_CS4_PHYS, | |
91 | .end = PXA_CS4_PHYS + 3, | |
92 | .flags = IORESOURCE_MEM, | |
93 | }, | |
94 | }; | |
95 | ||
96 | static struct v3020_platform_data em_x270_v3020_platdata = { | |
97 | .leftshift = 0, | |
98 | }; | |
99 | ||
100 | static struct platform_device em_x270_rtc = { | |
101 | .name = "v3020", | |
102 | .num_resources = ARRAY_SIZE(em_x270_v3020_resource), | |
103 | .resource = em_x270_v3020_resource, | |
104 | .id = -1, | |
105 | .dev = { | |
106 | .platform_data = &em_x270_v3020_platdata, | |
107 | } | |
108 | }; | |
109 | ||
110 | /* NAND flash */ | |
111 | #define GPIO_NAND_CS (11) | |
112 | #define GPIO_NAND_RB (56) | |
113 | ||
114 | static inline void nand_cs_on(void) | |
115 | { | |
116 | GPCR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS); | |
117 | } | |
118 | ||
119 | static void nand_cs_off(void) | |
120 | { | |
121 | dsb(); | |
122 | ||
123 | GPSR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS); | |
124 | } | |
125 | ||
126 | /* hardware specific access to control-lines */ | |
127 | static void em_x270_nand_cmd_ctl(struct mtd_info *mtd, int dat, | |
128 | unsigned int ctrl) | |
129 | { | |
130 | struct nand_chip *this = mtd->priv; | |
131 | unsigned long nandaddr = (unsigned long)this->IO_ADDR_W; | |
132 | ||
133 | dsb(); | |
134 | ||
135 | if (ctrl & NAND_CTRL_CHANGE) { | |
136 | if (ctrl & NAND_ALE) | |
137 | nandaddr |= (1 << 3); | |
138 | else | |
139 | nandaddr &= ~(1 << 3); | |
140 | if (ctrl & NAND_CLE) | |
141 | nandaddr |= (1 << 2); | |
142 | else | |
143 | nandaddr &= ~(1 << 2); | |
144 | if (ctrl & NAND_NCE) | |
145 | nand_cs_on(); | |
146 | else | |
147 | nand_cs_off(); | |
148 | } | |
149 | ||
150 | dsb(); | |
151 | this->IO_ADDR_W = (void __iomem *)nandaddr; | |
152 | if (dat != NAND_CMD_NONE) | |
153 | writel(dat, this->IO_ADDR_W); | |
154 | ||
155 | dsb(); | |
156 | } | |
157 | ||
158 | /* read device ready pin */ | |
159 | static int em_x270_nand_device_ready(struct mtd_info *mtd) | |
160 | { | |
161 | dsb(); | |
162 | ||
163 | return GPLR(GPIO_NAND_RB) & GPIO_bit(GPIO_NAND_RB); | |
164 | } | |
165 | ||
166 | static struct mtd_partition em_x270_partition_info[] = { | |
167 | [0] = { | |
168 | .name = "em_x270-0", | |
169 | .offset = 0, | |
170 | .size = SZ_4M, | |
171 | }, | |
172 | [1] = { | |
173 | .name = "em_x270-1", | |
174 | .offset = MTDPART_OFS_APPEND, | |
175 | .size = MTDPART_SIZ_FULL | |
176 | }, | |
177 | }; | |
178 | ||
179 | static const char *em_x270_part_probes[] = { "cmdlinepart", NULL }; | |
180 | ||
181 | struct platform_nand_data em_x270_nand_platdata = { | |
182 | .chip = { | |
183 | .nr_chips = 1, | |
184 | .chip_offset = 0, | |
185 | .nr_partitions = ARRAY_SIZE(em_x270_partition_info), | |
186 | .partitions = em_x270_partition_info, | |
187 | .chip_delay = 20, | |
188 | .part_probe_types = em_x270_part_probes, | |
189 | }, | |
190 | .ctrl = { | |
191 | .hwcontrol = 0, | |
192 | .dev_ready = em_x270_nand_device_ready, | |
193 | .select_chip = 0, | |
194 | .cmd_ctrl = em_x270_nand_cmd_ctl, | |
195 | }, | |
196 | }; | |
197 | ||
198 | static struct resource em_x270_nand_resource[] = { | |
199 | [0] = { | |
200 | .start = PXA_CS1_PHYS, | |
201 | .end = PXA_CS1_PHYS + 12, | |
202 | .flags = IORESOURCE_MEM, | |
203 | }, | |
204 | }; | |
205 | ||
206 | static struct platform_device em_x270_nand = { | |
207 | .name = "gen_nand", | |
208 | .num_resources = ARRAY_SIZE(em_x270_nand_resource), | |
209 | .resource = em_x270_nand_resource, | |
210 | .id = -1, | |
211 | .dev = { | |
212 | .platform_data = &em_x270_nand_platdata, | |
213 | } | |
214 | }; | |
215 | ||
216 | /* platform devices */ | |
217 | static struct platform_device *platform_devices[] __initdata = { | |
218 | &em_x270_dm9k, | |
219 | &em_x270_audio, | |
220 | &em_x270_ts, | |
221 | &em_x270_rtc, | |
222 | &em_x270_nand, | |
223 | }; | |
224 | ||
225 | ||
226 | /* PXA27x OHCI controller setup */ | |
227 | static int em_x270_ohci_init(struct device *dev) | |
228 | { | |
229 | /* Set the Power Control Polarity Low */ | |
230 | UHCHR = (UHCHR | UHCHR_PCPL) & | |
231 | ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE); | |
232 | ||
233 | /* enable port 2 transiever */ | |
234 | UP2OCR = UP2OCR_HXS | UP2OCR_HXOE; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static struct pxaohci_platform_data em_x270_ohci_platform_data = { | |
240 | .port_mode = PMM_PERPORT_MODE, | |
241 | .init = em_x270_ohci_init, | |
242 | }; | |
243 | ||
244 | ||
245 | static int em_x270_mci_init(struct device *dev, | |
246 | irq_handler_t em_x270_detect_int, | |
247 | void *data) | |
248 | { | |
249 | int err; | |
250 | ||
251 | /* setup GPIO for PXA27x MMC controller */ | |
252 | pxa_gpio_mode(GPIO32_MMCCLK_MD); | |
253 | pxa_gpio_mode(GPIO112_MMCCMD_MD); | |
254 | pxa_gpio_mode(GPIO92_MMCDAT0_MD); | |
255 | pxa_gpio_mode(GPIO109_MMCDAT1_MD); | |
256 | pxa_gpio_mode(GPIO110_MMCDAT2_MD); | |
257 | pxa_gpio_mode(GPIO111_MMCDAT3_MD); | |
258 | ||
259 | /* EM-X270 uses GPIO13 as SD power enable */ | |
260 | pxa_gpio_mode(EM_X270_MMC_PD | GPIO_OUT); | |
261 | ||
262 | err = request_irq(EM_X270_MMC_IRQ, em_x270_detect_int, | |
263 | IRQF_DISABLED | IRQF_TRIGGER_FALLING, | |
264 | "MMC card detect", data); | |
265 | if (err) { | |
266 | printk(KERN_ERR "%s: can't request MMC card detect IRQ: %d\n", | |
267 | __FUNCTION__, err); | |
268 | return err; | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static void em_x270_mci_setpower(struct device *dev, unsigned int vdd) | |
275 | { | |
276 | /* | |
277 | FIXME: current hardware implementation does not allow to | |
278 | enable/disable MMC power. This will be fixed in next HW releases, | |
279 | and we'll need to add implmentation here. | |
280 | */ | |
281 | return; | |
282 | } | |
283 | ||
284 | static void em_x270_mci_exit(struct device *dev, void *data) | |
285 | { | |
286 | free_irq(EM_X270_MMC_IRQ, data); | |
287 | } | |
288 | ||
289 | static struct pxamci_platform_data em_x270_mci_platform_data = { | |
290 | .ocr_mask = MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31, | |
291 | .init = em_x270_mci_init, | |
292 | .setpower = em_x270_mci_setpower, | |
293 | .exit = em_x270_mci_exit, | |
294 | }; | |
295 | ||
296 | /* LCD 480x640 */ | |
297 | static struct pxafb_mode_info em_x270_lcd_mode = { | |
298 | .pixclock = 50000, | |
299 | .bpp = 16, | |
300 | .xres = 480, | |
301 | .yres = 640, | |
302 | .hsync_len = 8, | |
303 | .vsync_len = 2, | |
304 | .left_margin = 8, | |
305 | .upper_margin = 0, | |
306 | .right_margin = 24, | |
307 | .lower_margin = 4, | |
308 | .cmap_greyscale = 0, | |
309 | }; | |
310 | ||
311 | static struct pxafb_mach_info em_x270_lcd = { | |
312 | .modes = &em_x270_lcd_mode, | |
313 | .num_modes = 1, | |
314 | .cmap_inverse = 0, | |
315 | .cmap_static = 0, | |
316 | .lccr0 = LCCR0_PAS, | |
317 | .lccr3 = LCCR3_PixClkDiv(0x01) | LCCR3_Acb(0xff), | |
318 | }; | |
319 | ||
320 | static void __init em_x270_init(void) | |
321 | { | |
322 | /* setup LCD */ | |
323 | set_pxa_fb_info(&em_x270_lcd); | |
324 | ||
325 | /* register EM-X270 platform devices */ | |
326 | platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices)); | |
327 | ||
328 | /* set MCI and OHCI platform parameters */ | |
329 | pxa_set_mci_info(&em_x270_mci_platform_data); | |
330 | pxa_set_ohci_info(&em_x270_ohci_platform_data); | |
331 | ||
332 | /* setup STUART GPIOs */ | |
333 | pxa_gpio_mode(GPIO46_STRXD_MD); | |
334 | pxa_gpio_mode(GPIO47_STTXD_MD); | |
335 | ||
336 | /* setup BTUART GPIOs */ | |
337 | pxa_gpio_mode(GPIO42_BTRXD_MD); | |
338 | pxa_gpio_mode(GPIO43_BTTXD_MD); | |
339 | pxa_gpio_mode(GPIO44_BTCTS_MD); | |
340 | pxa_gpio_mode(GPIO45_BTRTS_MD); | |
341 | ||
342 | /* Setup interrupt for dm9000 */ | |
343 | set_irq_type(EM_X270_ETHIRQ, IRQT_RISING); | |
344 | } | |
345 | ||
346 | MACHINE_START(EM_X270, "Compulab EM-x270") | |
347 | .boot_params = 0xa0000100, | |
348 | .phys_io = 0x40000000, | |
349 | .io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc, | |
350 | .map_io = pxa_map_io, | |
351 | .init_irq = pxa27x_init_irq, | |
352 | .timer = &pxa_timer, | |
353 | .init_machine = em_x270_init, | |
354 | MACHINE_END |