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>
22 #include <linux/i2c/at24.h>
23 #include <linux/leds.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/partitions.h>
26 #include <linux/mtd/nand.h>
27 #include <asm/setup.h>
28 #include <asm/mach-types.h>
29 #include <asm/mach/arch.h>
30 #include <asm/mach/map.h>
31 #include <mach/mux.h>
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>
37 #include <mach/serial.h>
38 #include <mach/mmc.h>
39 #include <mach/nand.h>
40
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
55 #define DM365_ASYNC_EMIF_CONTROL_BASE 0x01d10000
56 #define DM365_ASYNC_EMIF_DATA_CE0_BASE 0x02000000
57 #define DM365_ASYNC_EMIF_DATA_CE1_BASE 0x04000000
58
59 #define DM365_EVM_PHY_MASK (0x2)
60 #define DM365_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */
61
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
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
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
186 static struct davinci_i2c_platform_data i2c_pdata = {
187 .bus_freq = 400 /* kHz */,
188 .bus_delay = 0 /* usec */,
189 };
190
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
209 static struct davinci_mmc_config dm365evm_mmc_config = {
210 .get_cd = cpld_mmc_get_cd,
211 .get_ro = cpld_mmc_get_ro,
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
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
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
269 static void __init evm_init_i2c(void)
270 {
271 davinci_init_i2c(&i2c_pdata);
272 i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
273 }
274
275 static struct platform_device *dm365_evm_nand_devices[] __initdata = {
276 &davinci_nand_device,
277 };
278
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 |= 2;
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 |= 1;
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
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);
467
468 dm365evm_emac_configure();
469 dm365evm_mmc_configure();
470
471 davinci_setup_mmc(0, &dm365evm_mmc_config);
472
473 /* maybe setup mmc1/etc ... _after_ mmc0 */
474 evm_init_cpld();
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
492
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