xref: /openbmc/linux/arch/arm/mach-ep93xx/ts72xx.c (revision ba61bb17) 
1 /*
2  * arch/arm/mach-ep93xx/ts72xx.c
3  * Technologic Systems TS72xx SBC support.
4  *
5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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 as published by
9  * the Free Software Foundation; either version 2 of the License, or (at
10  * your option) any later version.
11  */
12 
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/mtd/rawnand.h>
20 #include <linux/mtd/partitions.h>
21 #include <linux/spi/spi.h>
22 #include <linux/spi/flash.h>
23 #include <linux/spi/mmc_spi.h>
24 #include <linux/mmc/host.h>
25 #include <linux/platform_data/spi-ep93xx.h>
26 
27 #include <mach/gpio-ep93xx.h>
28 #include <mach/hardware.h>
29 #include <mach/irqs.h>
30 #include <mach/gpio-ep93xx.h>
31 
32 #include <asm/mach-types.h>
33 #include <asm/mach/map.h>
34 #include <asm/mach/arch.h>
35 
36 #include "soc.h"
37 #include "ts72xx.h"
38 
39 /*************************************************************************
40  * IO map
41  *************************************************************************/
42 static struct map_desc ts72xx_io_desc[] __initdata = {
43 	{
44 		.virtual	= (unsigned long)TS72XX_MODEL_VIRT_BASE,
45 		.pfn		= __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
46 		.length		= TS72XX_MODEL_SIZE,
47 		.type		= MT_DEVICE,
48 	}, {
49 		.virtual	= (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
50 		.pfn		= __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
51 		.length		= TS72XX_OPTIONS_SIZE,
52 		.type		= MT_DEVICE,
53 	}, {
54 		.virtual	= (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
55 		.pfn		= __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
56 		.length		= TS72XX_OPTIONS2_SIZE,
57 		.type		= MT_DEVICE,
58 	}, {
59 		.virtual	= (unsigned long)TS72XX_CPLDVER_VIRT_BASE,
60 		.pfn		= __phys_to_pfn(TS72XX_CPLDVER_PHYS_BASE),
61 		.length		= TS72XX_CPLDVER_SIZE,
62 		.type		= MT_DEVICE,
63 	}
64 };
65 
66 static void __init ts72xx_map_io(void)
67 {
68 	ep93xx_map_io();
69 	iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
70 }
71 
72 
73 /*************************************************************************
74  * NAND flash
75  *************************************************************************/
76 #define TS72XX_NAND_CONTROL_ADDR_LINE	22	/* 0xN0400000 */
77 #define TS72XX_NAND_BUSY_ADDR_LINE	23	/* 0xN0800000 */
78 
79 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
80 				  int cmd, unsigned int ctrl)
81 {
82 	struct nand_chip *chip = mtd_to_nand(mtd);
83 
84 	if (ctrl & NAND_CTRL_CHANGE) {
85 		void __iomem *addr = chip->IO_ADDR_R;
86 		unsigned char bits;
87 
88 		addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
89 
90 		bits = __raw_readb(addr) & ~0x07;
91 		bits |= (ctrl & NAND_NCE) << 2;	/* bit 0 -> bit 2 */
92 		bits |= (ctrl & NAND_CLE);	/* bit 1 -> bit 1 */
93 		bits |= (ctrl & NAND_ALE) >> 2;	/* bit 2 -> bit 0 */
94 
95 		__raw_writeb(bits, addr);
96 	}
97 
98 	if (cmd != NAND_CMD_NONE)
99 		__raw_writeb(cmd, chip->IO_ADDR_W);
100 }
101 
102 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
103 {
104 	struct nand_chip *chip = mtd_to_nand(mtd);
105 	void __iomem *addr = chip->IO_ADDR_R;
106 
107 	addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
108 
109 	return !!(__raw_readb(addr) & 0x20);
110 }
111 
112 #define TS72XX_BOOTROM_PART_SIZE	(SZ_16K)
113 #define TS72XX_REDBOOT_PART_SIZE	(SZ_2M + SZ_1M)
114 
115 static struct mtd_partition ts72xx_nand_parts[] = {
116 	{
117 		.name		= "TS-BOOTROM",
118 		.offset		= 0,
119 		.size		= TS72XX_BOOTROM_PART_SIZE,
120 		.mask_flags	= MTD_WRITEABLE,	/* force read-only */
121 	}, {
122 		.name		= "Linux",
123 		.offset		= MTDPART_OFS_RETAIN,
124 		.size		= TS72XX_REDBOOT_PART_SIZE,
125 				/* leave so much for last partition */
126 	}, {
127 		.name		= "RedBoot",
128 		.offset		= MTDPART_OFS_APPEND,
129 		.size		= MTDPART_SIZ_FULL,
130 		.mask_flags	= MTD_WRITEABLE,	/* force read-only */
131 	},
132 };
133 
134 static struct platform_nand_data ts72xx_nand_data = {
135 	.chip = {
136 		.nr_chips	= 1,
137 		.chip_offset	= 0,
138 		.chip_delay	= 15,
139 	},
140 	.ctrl = {
141 		.cmd_ctrl	= ts72xx_nand_hwcontrol,
142 		.dev_ready	= ts72xx_nand_device_ready,
143 	},
144 };
145 
146 static struct resource ts72xx_nand_resource[] = {
147 	{
148 		.start		= 0,			/* filled in later */
149 		.end		= 0,			/* filled in later */
150 		.flags		= IORESOURCE_MEM,
151 	},
152 };
153 
154 static struct platform_device ts72xx_nand_flash = {
155 	.name			= "gen_nand",
156 	.id			= -1,
157 	.dev.platform_data	= &ts72xx_nand_data,
158 	.resource		= ts72xx_nand_resource,
159 	.num_resources		= ARRAY_SIZE(ts72xx_nand_resource),
160 };
161 
162 void __init ts72xx_register_flash(struct mtd_partition *parts, int n,
163 				  resource_size_t start)
164 {
165 	/*
166 	 * TS7200 has NOR flash all other TS72xx board have NAND flash.
167 	 */
168 	if (board_is_ts7200()) {
169 		ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
170 	} else {
171 		ts72xx_nand_resource[0].start = start;
172 		ts72xx_nand_resource[0].end = start + SZ_16M - 1;
173 
174 		ts72xx_nand_data.chip.partitions = parts;
175 		ts72xx_nand_data.chip.nr_partitions = n;
176 
177 		platform_device_register(&ts72xx_nand_flash);
178 	}
179 }
180 
181 /*************************************************************************
182  * RTC M48T86
183  *************************************************************************/
184 #define TS72XX_RTC_INDEX_PHYS_BASE	(EP93XX_CS1_PHYS_BASE + 0x00800000)
185 #define TS72XX_RTC_DATA_PHYS_BASE	(EP93XX_CS1_PHYS_BASE + 0x01700000)
186 
187 static struct resource ts72xx_rtc_resources[] = {
188 	DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
189 	DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
190 };
191 
192 static struct platform_device ts72xx_rtc_device = {
193 	.name		= "rtc-m48t86",
194 	.id		= -1,
195 	.resource	= ts72xx_rtc_resources,
196 	.num_resources 	= ARRAY_SIZE(ts72xx_rtc_resources),
197 };
198 
199 /*************************************************************************
200  * Watchdog (in CPLD)
201  *************************************************************************/
202 #define TS72XX_WDT_CONTROL_PHYS_BASE	(EP93XX_CS2_PHYS_BASE + 0x03800000)
203 #define TS72XX_WDT_FEED_PHYS_BASE	(EP93XX_CS2_PHYS_BASE + 0x03c00000)
204 
205 static struct resource ts72xx_wdt_resources[] = {
206 	DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, 0x01),
207 	DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, 0x01),
208 };
209 
210 static struct platform_device ts72xx_wdt_device = {
211 	.name		= "ts72xx-wdt",
212 	.id		= -1,
213 	.resource	= ts72xx_wdt_resources,
214 	.num_resources	= ARRAY_SIZE(ts72xx_wdt_resources),
215 };
216 
217 /*************************************************************************
218  * ETH
219  *************************************************************************/
220 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
221 	.phy_id		= 1,
222 };
223 
224 /*************************************************************************
225  * SPI SD/MMC host
226  *************************************************************************/
227 #define BK3_EN_SDCARD_PHYS_BASE         0x12400000
228 #define BK3_EN_SDCARD_PWR 0x0
229 #define BK3_DIS_SDCARD_PWR 0x0C
230 static void bk3_mmc_spi_setpower(struct device *dev, unsigned int vdd)
231 {
232 	void __iomem *pwr_sd = ioremap(BK3_EN_SDCARD_PHYS_BASE, SZ_4K);
233 
234 	if (!pwr_sd) {
235 		pr_err("Failed to enable SD card power!");
236 		return;
237 	}
238 
239 	pr_debug("%s: SD card pwr %s VDD:0x%x\n", __func__,
240 		 !!vdd ? "ON" : "OFF", vdd);
241 
242 	if (!!vdd)
243 		__raw_writeb(BK3_EN_SDCARD_PWR, pwr_sd);
244 	else
245 		__raw_writeb(BK3_DIS_SDCARD_PWR, pwr_sd);
246 
247 	iounmap(pwr_sd);
248 }
249 
250 static struct mmc_spi_platform_data bk3_spi_mmc_data = {
251 	.detect_delay	= 500,
252 	.powerup_msecs	= 100,
253 	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
254 	.caps		= MMC_CAP_NONREMOVABLE,
255 	.setpower       = bk3_mmc_spi_setpower,
256 };
257 
258 /*************************************************************************
259  * SPI Bus - SD card access
260  *************************************************************************/
261 static struct spi_board_info bk3_spi_board_info[] __initdata = {
262 	{
263 		.modalias		= "mmc_spi",
264 		.platform_data		= &bk3_spi_mmc_data,
265 		.max_speed_hz		= 7.4E6,
266 		.bus_num		= 0,
267 		.chip_select		= 0,
268 		.mode			= SPI_MODE_0,
269 	},
270 };
271 
272 /*
273  * This is a stub -> the FGPIO[3] pin is not connected on the schematic
274  * The all work is performed automatically by !SPI_FRAME (SFRM1) and
275  * goes through CPLD
276  */
277 static int bk3_spi_chipselects[] __initdata = {
278 	EP93XX_GPIO_LINE_F(3),
279 };
280 
281 static struct ep93xx_spi_info bk3_spi_master __initdata = {
282 	.chipselect	= bk3_spi_chipselects,
283 	.num_chipselect = ARRAY_SIZE(bk3_spi_chipselects),
284 	.use_dma	= 1,
285 };
286 
287 /*************************************************************************
288  * TS72XX support code
289  *************************************************************************/
290 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
291 
292 /* Relative to EP93XX_CS1_PHYS_BASE */
293 #define TS73XX_FPGA_LOADER_BASE		0x03c00000
294 
295 static struct resource ts73xx_fpga_resources[] = {
296 	{
297 		.start	= EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE,
298 		.end	= EP93XX_CS1_PHYS_BASE + TS73XX_FPGA_LOADER_BASE + 1,
299 		.flags	= IORESOURCE_MEM,
300 	},
301 };
302 
303 static struct platform_device ts73xx_fpga_device = {
304 	.name	= "ts73xx-fpga-mgr",
305 	.id	= -1,
306 	.resource = ts73xx_fpga_resources,
307 	.num_resources = ARRAY_SIZE(ts73xx_fpga_resources),
308 };
309 
310 #endif
311 
312 /*************************************************************************
313  * SPI Bus
314  *************************************************************************/
315 static struct spi_board_info ts72xx_spi_devices[] __initdata = {
316 	{
317 		.modalias		= "tmp122",
318 		.max_speed_hz		= 2 * 1000 * 1000,
319 		.bus_num		= 0,
320 		.chip_select		= 0,
321 	},
322 };
323 
324 static int ts72xx_spi_chipselects[] __initdata = {
325 	EP93XX_GPIO_LINE_F(2),		/* DIO_17 */
326 };
327 
328 static struct ep93xx_spi_info ts72xx_spi_info __initdata = {
329 	.chipselect	= ts72xx_spi_chipselects,
330 	.num_chipselect	= ARRAY_SIZE(ts72xx_spi_chipselects),
331 };
332 
333 static void __init ts72xx_init_machine(void)
334 {
335 	ep93xx_init_devices();
336 	ts72xx_register_flash(ts72xx_nand_parts, ARRAY_SIZE(ts72xx_nand_parts),
337 			      is_ts9420_installed() ?
338 			      EP93XX_CS7_PHYS_BASE : EP93XX_CS6_PHYS_BASE);
339 	platform_device_register(&ts72xx_rtc_device);
340 	platform_device_register(&ts72xx_wdt_device);
341 
342 	ep93xx_register_eth(&ts72xx_eth_data, 1);
343 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
344 	if (board_is_ts7300())
345 		platform_device_register(&ts73xx_fpga_device);
346 #endif
347 	ep93xx_register_spi(&ts72xx_spi_info, ts72xx_spi_devices,
348 			    ARRAY_SIZE(ts72xx_spi_devices));
349 }
350 
351 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
352 	/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
353 	.atag_offset	= 0x100,
354 	.map_io		= ts72xx_map_io,
355 	.init_irq	= ep93xx_init_irq,
356 	.init_time	= ep93xx_timer_init,
357 	.init_machine	= ts72xx_init_machine,
358 	.init_late	= ep93xx_init_late,
359 	.restart	= ep93xx_restart,
360 MACHINE_END
361 
362 /*************************************************************************
363  * EP93xx I2S audio peripheral handling
364  *************************************************************************/
365 static struct resource ep93xx_i2s_resource[] = {
366 	DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
367 	DEFINE_RES_IRQ_NAMED(IRQ_EP93XX_SAI, "spilink i2s slave"),
368 };
369 
370 static struct platform_device ep93xx_i2s_device = {
371 	.name		= "ep93xx-spilink-i2s",
372 	.id		= -1,
373 	.num_resources	= ARRAY_SIZE(ep93xx_i2s_resource),
374 	.resource	= ep93xx_i2s_resource,
375 };
376 
377 /*************************************************************************
378  * BK3 support code
379  *************************************************************************/
380 static struct mtd_partition bk3_nand_parts[] = {
381 	{
382 		.name		= "System",
383 		.offset	= 0x00000000,
384 		.size		= 0x01e00000,
385 	}, {
386 		.name		= "Data",
387 		.offset	= 0x01e00000,
388 		.size		= 0x05f20000
389 	}, {
390 		.name		= "RedBoot",
391 		.offset	= 0x07d20000,
392 		.size		= 0x002e0000,
393 		.mask_flags	= MTD_WRITEABLE,	/* force RO */
394 	},
395 };
396 
397 static void __init bk3_init_machine(void)
398 {
399 	ep93xx_init_devices();
400 
401 	ts72xx_register_flash(bk3_nand_parts, ARRAY_SIZE(bk3_nand_parts),
402 			      EP93XX_CS6_PHYS_BASE);
403 
404 	ep93xx_register_eth(&ts72xx_eth_data, 1);
405 
406 	ep93xx_register_spi(&bk3_spi_master, bk3_spi_board_info,
407 			    ARRAY_SIZE(bk3_spi_board_info));
408 
409 	/* Configure ep93xx's I2S to use AC97 pins */
410 	ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
411 	platform_device_register(&ep93xx_i2s_device);
412 }
413 
414 MACHINE_START(BK3, "Liebherr controller BK3.1")
415 	/* Maintainer: Lukasz Majewski <lukma@denx.de> */
416 	.atag_offset	= 0x100,
417 	.map_io		= ts72xx_map_io,
418 	.init_irq	= ep93xx_init_irq,
419 	.init_time	= ep93xx_timer_init,
420 	.init_machine	= bk3_init_machine,
421 	.init_late	= ep93xx_init_late,
422 	.restart	= ep93xx_restart,
423 MACHINE_END
424