1 /*
2 * ATSTK1002/ATSTK1006 daughterboard-specific init code
3 *
4 * Copyright (C) 2005-2007 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include <linux/clk.h>
11 #include <linux/etherdevice.h>
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/platform_device.h>
15 #include <linux/string.h>
16 #include <linux/types.h>
17 #include <linux/spi/spi.h>
18 #include <linux/spi/at73c213.h>
19 #include <linux/atmel-mci.h>
20
21 #include <video/atmel_lcdc.h>
22
23 #include <asm/io.h>
24 #include <asm/setup.h>
25
26 #include <mach/at32ap700x.h>
27 #include <mach/board.h>
28 #include <mach/init.h>
29 #include <mach/portmux.h>
30
31 #include "atstk1000.h"
32
33 /* Oscillator frequencies. These are board specific */
34 unsigned long at32_board_osc_rates[3] = {
35 [0] = 32768, /* 32.768 kHz on RTC osc */
36 [1] = 20000000, /* 20 MHz on osc0 */
37 [2] = 12000000, /* 12 MHz on osc1 */
38 };
39
40 /*
41 * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
42 * have the AT32AP7000 chip on board; the difference is that the
43 * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
44 * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
45 * none.)
46 *
47 * The RAM difference is handled by the boot loader, so the only
48 * difference we end up handling here is the NAND flash.
49 */
50 #ifdef CONFIG_BOARD_ATSTK1006
51 #include <linux/mtd/partitions.h>
52 #include <mach/smc.h>
53
54 static struct smc_timing nand_timing __initdata = {
55 .ncs_read_setup = 0,
56 .nrd_setup = 10,
57 .ncs_write_setup = 0,
58 .nwe_setup = 10,
59
60 .ncs_read_pulse = 30,
61 .nrd_pulse = 15,
62 .ncs_write_pulse = 30,
63 .nwe_pulse = 15,
64
65 .read_cycle = 30,
66 .write_cycle = 30,
67
68 .ncs_read_recover = 0,
69 .nrd_recover = 15,
70 .ncs_write_recover = 0,
71 /* WE# high -> RE# low min 60 ns */
72 .nwe_recover = 50,
73 };
74
75 static struct smc_config nand_config __initdata = {
76 .bus_width = 1,
77 .nrd_controlled = 1,
78 .nwe_controlled = 1,
79 .nwait_mode = 0,
80 .byte_write = 0,
81 .tdf_cycles = 2,
82 .tdf_mode = 0,
83 };
84
85 static struct mtd_partition nand_partitions[] = {
86 {
87 .name = "main",
88 .offset = 0x00000000,
89 .size = MTDPART_SIZ_FULL,
90 },
91 };
92
nand_part_info(int size,int * num_partitions)93 static struct mtd_partition *nand_part_info(int size, int *num_partitions)
94 {
95 *num_partitions = ARRAY_SIZE(nand_partitions);
96 return nand_partitions;
97 }
98
99 static struct atmel_nand_data atstk1006_nand_data __initdata = {
100 .cle = 21,
101 .ale = 22,
102 .rdy_pin = GPIO_PIN_PB(30),
103 .enable_pin = GPIO_PIN_PB(29),
104 .partition_info = nand_part_info,
105 };
106 #endif
107
108 struct eth_addr {
109 u8 addr[6];
110 };
111
112 static struct eth_addr __initdata hw_addr[2];
113 static struct eth_platform_data __initdata eth_data[2] = {
114 {
115 /*
116 * The MDIO pullups on STK1000 are a bit too weak for
117 * the autodetection to work properly, so we have to
118 * mask out everything but the correct address.
119 */
120 .phy_mask = ~(1U << 16),
121 },
122 {
123 .phy_mask = ~(1U << 17),
124 },
125 };
126
127 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
128 static struct at73c213_board_info at73c213_data = {
129 .ssc_id = 0,
130 .shortname = "AVR32 STK1000 external DAC",
131 };
132 #endif
133
134 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
135 static struct spi_board_info spi0_board_info[] __initdata = {
136 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
137 {
138 /* AT73C213 */
139 .modalias = "at73c213",
140 .max_speed_hz = 200000,
141 .chip_select = 0,
142 .mode = SPI_MODE_1,
143 .platform_data = &at73c213_data,
144 },
145 #endif
146 {
147 /* QVGA display */
148 .modalias = "ltv350qv",
149 .max_speed_hz = 16000000,
150 .chip_select = 1,
151 .mode = SPI_MODE_3,
152 },
153 };
154 #endif
155
156 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
157 static struct spi_board_info spi1_board_info[] __initdata = { {
158 /* patch in custom entries here */
159 } };
160 #endif
161
162 /*
163 * The next two functions should go away as the boot loader is
164 * supposed to initialize the macb address registers with a valid
165 * ethernet address. But we need to keep it around for a while until
166 * we can be reasonably sure the boot loader does this.
167 *
168 * The phy_id is ignored as the driver will probe for it.
169 */
parse_tag_ethernet(struct tag * tag)170 static int __init parse_tag_ethernet(struct tag *tag)
171 {
172 int i;
173
174 i = tag->u.ethernet.mac_index;
175 if (i < ARRAY_SIZE(hw_addr))
176 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
177 sizeof(hw_addr[i].addr));
178
179 return 0;
180 }
181 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
182
set_hw_addr(struct platform_device * pdev)183 static void __init set_hw_addr(struct platform_device *pdev)
184 {
185 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
186 const u8 *addr;
187 void __iomem *regs;
188 struct clk *pclk;
189
190 if (!res)
191 return;
192 if (pdev->id >= ARRAY_SIZE(hw_addr))
193 return;
194
195 addr = hw_addr[pdev->id].addr;
196 if (!is_valid_ether_addr(addr))
197 return;
198
199 /*
200 * Since this is board-specific code, we'll cheat and use the
201 * physical address directly as we happen to know that it's
202 * the same as the virtual address.
203 */
204 regs = (void __iomem __force *)res->start;
205 pclk = clk_get(&pdev->dev, "pclk");
206 if (!pclk)
207 return;
208
209 clk_enable(pclk);
210 __raw_writel((addr[3] << 24) | (addr[2] << 16)
211 | (addr[1] << 8) | addr[0], regs + 0x98);
212 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
213 clk_disable(pclk);
214 clk_put(pclk);
215 }
216
217 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
atstk1002_setup_extdac(void)218 static void __init atstk1002_setup_extdac(void)
219 {
220 struct clk *gclk;
221 struct clk *pll;
222
223 gclk = clk_get(NULL, "gclk0");
224 if (IS_ERR(gclk))
225 goto err_gclk;
226 pll = clk_get(NULL, "pll0");
227 if (IS_ERR(pll))
228 goto err_pll;
229
230 if (clk_set_parent(gclk, pll)) {
231 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
232 goto err_set_clk;
233 }
234
235 at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);
236 at73c213_data.dac_clk = gclk;
237
238 err_set_clk:
239 clk_put(pll);
240 err_pll:
241 clk_put(gclk);
242 err_gclk:
243 return;
244 }
245 #else
atstk1002_setup_extdac(void)246 static void __init atstk1002_setup_extdac(void)
247 {
248
249 }
250 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
251
setup_board(void)252 void __init setup_board(void)
253 {
254 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
255 at32_map_usart(0, 1); /* USART 0/B: /dev/ttyS1, IRDA */
256 #else
257 at32_map_usart(1, 0); /* USART 1/A: /dev/ttyS0, DB9 */
258 #endif
259 /* USART 2/unused: expansion connector */
260 at32_map_usart(3, 2); /* USART 3/C: /dev/ttyS2, DB9 */
261
262 at32_setup_serial_console(0);
263 }
264
265 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
266
267 static struct mci_platform_data __initdata mci0_data = {
268 .slot[0] = {
269 .bus_width = 4,
270
271 /* MMC card detect requires MACB0 *NOT* be used */
272 #ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
273 .detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
274 .wp_pin = GPIO_PIN_PC(15), /* gpio31/sdwp */
275 #else
276 .detect_pin = -ENODEV,
277 .wp_pin = -ENODEV,
278 #endif /* SW6 for sd{cd,wp} routing */
279 },
280 };
281
282 #endif /* SW2 for MMC signal routing */
283
atstk1002_init(void)284 static int __init atstk1002_init(void)
285 {
286 /*
287 * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
288 * SDRAM-specific pins so that nobody messes with them.
289 */
290 at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
291
292 #ifdef CONFIG_BOARD_ATSTK1006
293 smc_set_timing(&nand_config, &nand_timing);
294 smc_set_configuration(3, &nand_config);
295 at32_add_device_nand(0, &atstk1006_nand_data);
296 #endif
297
298 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
299 at32_add_device_usart(1);
300 #else
301 at32_add_device_usart(0);
302 #endif
303 at32_add_device_usart(2);
304
305 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
306 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
307 #endif
308 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
309 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
310 #endif
311 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
312 at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
313 #endif
314 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
315 at32_add_device_mci(0, &mci0_data);
316 #endif
317 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
318 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
319 #else
320 at32_add_device_lcdc(0, &atstk1000_lcdc_data,
321 fbmem_start, fbmem_size,
322 ATMEL_LCDC_PRI_24BIT | ATMEL_LCDC_PRI_CONTROL);
323 #endif
324 at32_add_device_usba(0, NULL);
325 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
326 at32_add_device_ssc(0, ATMEL_SSC_TX);
327 #endif
328
329 atstk1000_setup_j2_leds();
330 atstk1002_setup_extdac();
331
332 return 0;
333 }
334 postcore_initcall(atstk1002_init);
335