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37dd0095 SP |
1 | /* |
2 | * TI DaVinci DM365 EVM board support | |
3 | * | |
4 | * Copyright (C) 2009 Texas Instruments Incorporated | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation version 2. | |
9 | * | |
10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
11 | * kind, whether express or implied; without even the implied warranty | |
12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/clk.h> | |
8ed0a9d4 | 22 | #include <linux/i2c/at24.h> |
ff255c6c | 23 | #include <linux/leds.h> |
37b798da SP |
24 | #include <linux/mtd/mtd.h> |
25 | #include <linux/mtd/partitions.h> | |
26 | #include <linux/mtd/nand.h> | |
37dd0095 SP |
27 | #include <asm/setup.h> |
28 | #include <asm/mach-types.h> | |
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/mach/map.h> | |
8ed0a9d4 | 31 | #include <mach/mux.h> |
37dd0095 SP |
32 | #include <mach/hardware.h> |
33 | #include <mach/dm365.h> | |
34 | #include <mach/psc.h> | |
35 | #include <mach/common.h> | |
36 | #include <mach/i2c.h> | |
37dd0095 | 37 | #include <mach/serial.h> |
a45c8ba3 | 38 | #include <mach/mmc.h> |
37b798da SP |
39 | #include <mach/nand.h> |
40 | ||
ff255c6c DB |
41 | |
42 | static inline int have_imager(void) | |
43 | { | |
44 | /* REVISIT when it's supported, trigger via Kconfig */ | |
45 | return 0; | |
46 | } | |
47 | ||
48 | static inline int have_tvp7002(void) | |
49 | { | |
50 | /* REVISIT when it's supported, trigger via Kconfig */ | |
51 | return 0; | |
52 | } | |
53 | ||
54 | ||
37b798da SP |
55 | #define DM365_ASYNC_EMIF_CONTROL_BASE 0x01d10000 |
56 | #define DM365_ASYNC_EMIF_DATA_CE0_BASE 0x02000000 | |
ff255c6c | 57 | #define DM365_ASYNC_EMIF_DATA_CE1_BASE 0x04000000 |
37dd0095 | 58 | |
8ed0a9d4 SP |
59 | #define DM365_EVM_PHY_MASK (0x2) |
60 | #define DM365_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */ | |
61 | ||
ff255c6c DB |
62 | /* |
63 | * A MAX-II CPLD is used for various board control functions. | |
64 | */ | |
65 | #define CPLD_OFFSET(a13a8,a2a1) (((a13a8) << 10) + ((a2a1) << 3)) | |
66 | ||
67 | #define CPLD_VERSION CPLD_OFFSET(0,0) /* r/o */ | |
68 | #define CPLD_TEST CPLD_OFFSET(0,1) | |
69 | #define CPLD_LEDS CPLD_OFFSET(0,2) | |
70 | #define CPLD_MUX CPLD_OFFSET(0,3) | |
71 | #define CPLD_SWITCH CPLD_OFFSET(1,0) /* r/o */ | |
72 | #define CPLD_POWER CPLD_OFFSET(1,1) | |
73 | #define CPLD_VIDEO CPLD_OFFSET(1,2) | |
74 | #define CPLD_CARDSTAT CPLD_OFFSET(1,3) /* r/o */ | |
75 | ||
76 | #define CPLD_DILC_OUT CPLD_OFFSET(2,0) | |
77 | #define CPLD_DILC_IN CPLD_OFFSET(2,1) /* r/o */ | |
78 | ||
79 | #define CPLD_IMG_DIR0 CPLD_OFFSET(2,2) | |
80 | #define CPLD_IMG_MUX0 CPLD_OFFSET(2,3) | |
81 | #define CPLD_IMG_MUX1 CPLD_OFFSET(3,0) | |
82 | #define CPLD_IMG_DIR1 CPLD_OFFSET(3,1) | |
83 | #define CPLD_IMG_MUX2 CPLD_OFFSET(3,2) | |
84 | #define CPLD_IMG_MUX3 CPLD_OFFSET(3,3) | |
85 | #define CPLD_IMG_DIR2 CPLD_OFFSET(4,0) | |
86 | #define CPLD_IMG_MUX4 CPLD_OFFSET(4,1) | |
87 | #define CPLD_IMG_MUX5 CPLD_OFFSET(4,2) | |
88 | ||
89 | #define CPLD_RESETS CPLD_OFFSET(4,3) | |
90 | ||
91 | #define CPLD_CCD_DIR1 CPLD_OFFSET(0x3e,0) | |
92 | #define CPLD_CCD_IO1 CPLD_OFFSET(0x3e,1) | |
93 | #define CPLD_CCD_DIR2 CPLD_OFFSET(0x3e,2) | |
94 | #define CPLD_CCD_IO2 CPLD_OFFSET(0x3e,3) | |
95 | #define CPLD_CCD_DIR3 CPLD_OFFSET(0x3f,0) | |
96 | #define CPLD_CCD_IO3 CPLD_OFFSET(0x3f,1) | |
97 | ||
98 | static void __iomem *cpld; | |
99 | ||
100 | ||
37b798da SP |
101 | /* NOTE: this is geared for the standard config, with a socketed |
102 | * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you | |
103 | * swap chips with a different block size, partitioning will | |
104 | * need to be changed. This NAND chip MT29F16G08FAA is the default | |
105 | * NAND shipped with the Spectrum Digital DM365 EVM | |
106 | */ | |
107 | #define NAND_BLOCK_SIZE SZ_128K | |
108 | ||
109 | static struct mtd_partition davinci_nand_partitions[] = { | |
110 | { | |
111 | /* UBL (a few copies) plus U-Boot */ | |
112 | .name = "bootloader", | |
113 | .offset = 0, | |
114 | .size = 28 * NAND_BLOCK_SIZE, | |
115 | .mask_flags = MTD_WRITEABLE, /* force read-only */ | |
116 | }, { | |
117 | /* U-Boot environment */ | |
118 | .name = "params", | |
119 | .offset = MTDPART_OFS_APPEND, | |
120 | .size = 2 * NAND_BLOCK_SIZE, | |
121 | .mask_flags = 0, | |
122 | }, { | |
123 | .name = "kernel", | |
124 | .offset = MTDPART_OFS_APPEND, | |
125 | .size = SZ_4M, | |
126 | .mask_flags = 0, | |
127 | }, { | |
128 | .name = "filesystem1", | |
129 | .offset = MTDPART_OFS_APPEND, | |
130 | .size = SZ_512M, | |
131 | .mask_flags = 0, | |
132 | }, { | |
133 | .name = "filesystem2", | |
134 | .offset = MTDPART_OFS_APPEND, | |
135 | .size = MTDPART_SIZ_FULL, | |
136 | .mask_flags = 0, | |
137 | } | |
138 | /* two blocks with bad block table (and mirror) at the end */ | |
139 | }; | |
140 | ||
141 | static struct davinci_nand_pdata davinci_nand_data = { | |
142 | .mask_chipsel = BIT(14), | |
143 | .parts = davinci_nand_partitions, | |
144 | .nr_parts = ARRAY_SIZE(davinci_nand_partitions), | |
145 | .ecc_mode = NAND_ECC_HW, | |
146 | .options = NAND_USE_FLASH_BBT, | |
147 | }; | |
148 | ||
149 | static struct resource davinci_nand_resources[] = { | |
150 | { | |
151 | .start = DM365_ASYNC_EMIF_DATA_CE0_BASE, | |
152 | .end = DM365_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1, | |
153 | .flags = IORESOURCE_MEM, | |
154 | }, { | |
155 | .start = DM365_ASYNC_EMIF_CONTROL_BASE, | |
156 | .end = DM365_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1, | |
157 | .flags = IORESOURCE_MEM, | |
158 | }, | |
159 | }; | |
160 | ||
161 | static struct platform_device davinci_nand_device = { | |
162 | .name = "davinci_nand", | |
163 | .id = 0, | |
164 | .num_resources = ARRAY_SIZE(davinci_nand_resources), | |
165 | .resource = davinci_nand_resources, | |
166 | .dev = { | |
167 | .platform_data = &davinci_nand_data, | |
168 | }, | |
169 | }; | |
170 | ||
8ed0a9d4 SP |
171 | static struct at24_platform_data eeprom_info = { |
172 | .byte_len = (256*1024) / 8, | |
173 | .page_size = 64, | |
174 | .flags = AT24_FLAG_ADDR16, | |
175 | .setup = davinci_get_mac_addr, | |
176 | .context = (void *)0x7f00, | |
177 | }; | |
178 | ||
179 | static struct i2c_board_info i2c_info[] = { | |
180 | { | |
181 | I2C_BOARD_INFO("24c256", 0x50), | |
182 | .platform_data = &eeprom_info, | |
183 | }, | |
184 | }; | |
185 | ||
37dd0095 SP |
186 | static struct davinci_i2c_platform_data i2c_pdata = { |
187 | .bus_freq = 400 /* kHz */, | |
188 | .bus_delay = 0 /* usec */, | |
189 | }; | |
190 | ||
ff255c6c DB |
191 | static int cpld_mmc_get_cd(int module) |
192 | { | |
193 | if (!cpld) | |
194 | return -ENXIO; | |
195 | ||
196 | /* low == card present */ | |
197 | return !(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 4 : 0)); | |
198 | } | |
199 | ||
200 | static int cpld_mmc_get_ro(int module) | |
201 | { | |
202 | if (!cpld) | |
203 | return -ENXIO; | |
204 | ||
205 | /* high == card's write protect switch active */ | |
206 | return !!(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 5 : 1)); | |
207 | } | |
208 | ||
a45c8ba3 | 209 | static struct davinci_mmc_config dm365evm_mmc_config = { |
ff255c6c DB |
210 | .get_cd = cpld_mmc_get_cd, |
211 | .get_ro = cpld_mmc_get_ro, | |
a45c8ba3 SP |
212 | .wires = 4, |
213 | .max_freq = 50000000, | |
214 | .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED, | |
215 | .version = MMC_CTLR_VERSION_2, | |
216 | }; | |
217 | ||
8ed0a9d4 SP |
218 | static void dm365evm_emac_configure(void) |
219 | { | |
220 | /* | |
221 | * EMAC pins are multiplexed with GPIO and UART | |
222 | * Further details are available at the DM365 ARM | |
223 | * Subsystem Users Guide(sprufg5.pdf) pages 125 - 127 | |
224 | */ | |
225 | davinci_cfg_reg(DM365_EMAC_TX_EN); | |
226 | davinci_cfg_reg(DM365_EMAC_TX_CLK); | |
227 | davinci_cfg_reg(DM365_EMAC_COL); | |
228 | davinci_cfg_reg(DM365_EMAC_TXD3); | |
229 | davinci_cfg_reg(DM365_EMAC_TXD2); | |
230 | davinci_cfg_reg(DM365_EMAC_TXD1); | |
231 | davinci_cfg_reg(DM365_EMAC_TXD0); | |
232 | davinci_cfg_reg(DM365_EMAC_RXD3); | |
233 | davinci_cfg_reg(DM365_EMAC_RXD2); | |
234 | davinci_cfg_reg(DM365_EMAC_RXD1); | |
235 | davinci_cfg_reg(DM365_EMAC_RXD0); | |
236 | davinci_cfg_reg(DM365_EMAC_RX_CLK); | |
237 | davinci_cfg_reg(DM365_EMAC_RX_DV); | |
238 | davinci_cfg_reg(DM365_EMAC_RX_ER); | |
239 | davinci_cfg_reg(DM365_EMAC_CRS); | |
240 | davinci_cfg_reg(DM365_EMAC_MDIO); | |
241 | davinci_cfg_reg(DM365_EMAC_MDCLK); | |
242 | ||
243 | /* | |
244 | * EMAC interrupts are multiplexed with GPIO interrupts | |
245 | * Details are available at the DM365 ARM | |
246 | * Subsystem Users Guide(sprufg5.pdf) pages 133 - 134 | |
247 | */ | |
248 | davinci_cfg_reg(DM365_INT_EMAC_RXTHRESH); | |
249 | davinci_cfg_reg(DM365_INT_EMAC_RXPULSE); | |
250 | davinci_cfg_reg(DM365_INT_EMAC_TXPULSE); | |
251 | davinci_cfg_reg(DM365_INT_EMAC_MISCPULSE); | |
252 | } | |
253 | ||
a45c8ba3 SP |
254 | static void dm365evm_mmc_configure(void) |
255 | { | |
256 | /* | |
257 | * MMC/SD pins are multiplexed with GPIO and EMIF | |
258 | * Further details are available at the DM365 ARM | |
259 | * Subsystem Users Guide(sprufg5.pdf) pages 118, 128 - 131 | |
260 | */ | |
261 | davinci_cfg_reg(DM365_SD1_CLK); | |
262 | davinci_cfg_reg(DM365_SD1_CMD); | |
263 | davinci_cfg_reg(DM365_SD1_DATA3); | |
264 | davinci_cfg_reg(DM365_SD1_DATA2); | |
265 | davinci_cfg_reg(DM365_SD1_DATA1); | |
266 | davinci_cfg_reg(DM365_SD1_DATA0); | |
267 | } | |
268 | ||
37dd0095 SP |
269 | static void __init evm_init_i2c(void) |
270 | { | |
271 | davinci_init_i2c(&i2c_pdata); | |
8ed0a9d4 | 272 | i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info)); |
37dd0095 SP |
273 | } |
274 | ||
ff255c6c | 275 | static struct platform_device *dm365_evm_nand_devices[] __initdata = { |
37b798da SP |
276 | &davinci_nand_device, |
277 | }; | |
278 | ||
ff255c6c DB |
279 | static inline int have_leds(void) |
280 | { | |
281 | #ifdef CONFIG_LEDS_CLASS | |
282 | return 1; | |
283 | #else | |
284 | return 0; | |
285 | #endif | |
286 | } | |
287 | ||
288 | struct cpld_led { | |
289 | struct led_classdev cdev; | |
290 | u8 mask; | |
291 | }; | |
292 | ||
293 | static const struct { | |
294 | const char *name; | |
295 | const char *trigger; | |
296 | } cpld_leds[] = { | |
297 | { "dm365evm::ds2", }, | |
298 | { "dm365evm::ds3", }, | |
299 | { "dm365evm::ds4", }, | |
300 | { "dm365evm::ds5", }, | |
301 | { "dm365evm::ds6", "nand-disk", }, | |
302 | { "dm365evm::ds7", "mmc1", }, | |
303 | { "dm365evm::ds8", "mmc0", }, | |
304 | { "dm365evm::ds9", "heartbeat", }, | |
305 | }; | |
306 | ||
307 | static void cpld_led_set(struct led_classdev *cdev, enum led_brightness b) | |
308 | { | |
309 | struct cpld_led *led = container_of(cdev, struct cpld_led, cdev); | |
310 | u8 reg = __raw_readb(cpld + CPLD_LEDS); | |
311 | ||
312 | if (b != LED_OFF) | |
313 | reg &= ~led->mask; | |
314 | else | |
315 | reg |= led->mask; | |
316 | __raw_writeb(reg, cpld + CPLD_LEDS); | |
317 | } | |
318 | ||
319 | static enum led_brightness cpld_led_get(struct led_classdev *cdev) | |
320 | { | |
321 | struct cpld_led *led = container_of(cdev, struct cpld_led, cdev); | |
322 | u8 reg = __raw_readb(cpld + CPLD_LEDS); | |
323 | ||
324 | return (reg & led->mask) ? LED_OFF : LED_FULL; | |
325 | } | |
326 | ||
327 | static int __init cpld_leds_init(void) | |
328 | { | |
329 | int i; | |
330 | ||
331 | if (!have_leds() || !cpld) | |
332 | return 0; | |
333 | ||
334 | /* setup LEDs */ | |
335 | __raw_writeb(0xff, cpld + CPLD_LEDS); | |
336 | for (i = 0; i < ARRAY_SIZE(cpld_leds); i++) { | |
337 | struct cpld_led *led; | |
338 | ||
339 | led = kzalloc(sizeof(*led), GFP_KERNEL); | |
340 | if (!led) | |
341 | break; | |
342 | ||
343 | led->cdev.name = cpld_leds[i].name; | |
344 | led->cdev.brightness_set = cpld_led_set; | |
345 | led->cdev.brightness_get = cpld_led_get; | |
346 | led->cdev.default_trigger = cpld_leds[i].trigger; | |
347 | led->mask = BIT(i); | |
348 | ||
349 | if (led_classdev_register(NULL, &led->cdev) < 0) { | |
350 | kfree(led); | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | return 0; | |
356 | } | |
357 | /* run after subsys_initcall() for LEDs */ | |
358 | fs_initcall(cpld_leds_init); | |
359 | ||
360 | ||
361 | static void __init evm_init_cpld(void) | |
362 | { | |
363 | u8 mux, resets; | |
364 | const char *label; | |
365 | struct clk *aemif_clk; | |
366 | ||
367 | /* Make sure we can configure the CPLD through CS1. Then | |
368 | * leave it on for later access to MMC and LED registers. | |
369 | */ | |
370 | aemif_clk = clk_get(NULL, "aemif"); | |
371 | if (IS_ERR(aemif_clk)) | |
372 | return; | |
373 | clk_enable(aemif_clk); | |
374 | ||
375 | if (request_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE, | |
376 | "cpld") == NULL) | |
377 | goto fail; | |
378 | cpld = ioremap(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE); | |
379 | if (!cpld) { | |
380 | release_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, | |
381 | SECTION_SIZE); | |
382 | fail: | |
383 | pr_err("ERROR: can't map CPLD\n"); | |
384 | clk_disable(aemif_clk); | |
385 | return; | |
386 | } | |
387 | ||
388 | /* External muxing for some signals */ | |
389 | mux = 0; | |
390 | ||
391 | /* Read SW5 to set up NAND + keypad _or_ OneNAND (sync read). | |
392 | * NOTE: SW4 bus width setting must match! | |
393 | */ | |
394 | if ((__raw_readb(cpld + CPLD_SWITCH) & BIT(5)) == 0) { | |
395 | /* external keypad mux */ | |
396 | mux |= BIT(7); | |
397 | ||
398 | platform_add_devices(dm365_evm_nand_devices, | |
399 | ARRAY_SIZE(dm365_evm_nand_devices)); | |
400 | } else { | |
401 | /* no OneNAND support yet */ | |
402 | } | |
403 | ||
404 | /* Leave external chips in reset when unused. */ | |
405 | resets = BIT(3) | BIT(2) | BIT(1) | BIT(0); | |
406 | ||
407 | /* Static video input config with SN74CBT16214 1-of-3 mux: | |
408 | * - port b1 == tvp7002 (mux lowbits == 1 or 6) | |
409 | * - port b2 == imager (mux lowbits == 2 or 7) | |
410 | * - port b3 == tvp5146 (mux lowbits == 5) | |
411 | * | |
412 | * Runtime switching could work too, with limitations. | |
413 | */ | |
414 | if (have_imager()) { | |
415 | label = "HD imager"; | |
416 | mux |= 1; | |
417 | ||
418 | /* externally mux MMC1/ENET/AIC33 to imager */ | |
419 | mux |= BIT(6) | BIT(5) | BIT(3); | |
420 | } else { | |
421 | struct davinci_soc_info *soc_info = &davinci_soc_info; | |
422 | ||
423 | /* we can use MMC1 ... */ | |
424 | dm365evm_mmc_configure(); | |
425 | davinci_setup_mmc(1, &dm365evm_mmc_config); | |
426 | ||
427 | /* ... and ENET ... */ | |
428 | dm365evm_emac_configure(); | |
429 | soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK; | |
430 | soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY; | |
431 | resets &= ~BIT(3); | |
432 | ||
433 | /* ... and AIC33 */ | |
434 | resets &= ~BIT(1); | |
435 | ||
436 | if (have_tvp7002()) { | |
437 | mux |= 2; | |
438 | resets &= ~BIT(2); | |
439 | label = "tvp7002 HD"; | |
440 | } else { | |
441 | /* default to tvp5146 */ | |
442 | mux |= 5; | |
443 | resets &= ~BIT(0); | |
444 | label = "tvp5146 SD"; | |
445 | } | |
446 | } | |
447 | __raw_writeb(mux, cpld + CPLD_MUX); | |
448 | __raw_writeb(resets, cpld + CPLD_RESETS); | |
449 | pr_info("EVM: %s video input\n", label); | |
450 | ||
451 | /* REVISIT export switches: NTSC/PAL (SW5.6), EXTRA1 (SW5.2), etc */ | |
452 | } | |
453 | ||
37dd0095 SP |
454 | static struct davinci_uart_config uart_config __initdata = { |
455 | .enabled_uarts = (1 << 0), | |
456 | }; | |
457 | ||
458 | static void __init dm365_evm_map_io(void) | |
459 | { | |
460 | dm365_init(); | |
461 | } | |
462 | ||
463 | static __init void dm365_evm_init(void) | |
464 | { | |
465 | evm_init_i2c(); | |
466 | davinci_serial_init(&uart_config); | |
8ed0a9d4 SP |
467 | |
468 | dm365evm_emac_configure(); | |
a45c8ba3 SP |
469 | dm365evm_mmc_configure(); |
470 | ||
471 | davinci_setup_mmc(0, &dm365evm_mmc_config); | |
8ed0a9d4 | 472 | |
ff255c6c DB |
473 | /* maybe setup mmc1/etc ... _after_ mmc0 */ |
474 | evm_init_cpld(); | |
37dd0095 SP |
475 | } |
476 | ||
477 | static __init void dm365_evm_irq_init(void) | |
478 | { | |
479 | davinci_irq_init(); | |
480 | } | |
481 | ||
482 | MACHINE_START(DAVINCI_DM365_EVM, "DaVinci DM365 EVM") | |
483 | .phys_io = IO_PHYS, | |
484 | .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc, | |
485 | .boot_params = (0x80000100), | |
486 | .map_io = dm365_evm_map_io, | |
487 | .init_irq = dm365_evm_irq_init, | |
488 | .timer = &davinci_timer, | |
489 | .init_machine = dm365_evm_init, | |
490 | MACHINE_END | |
491 |