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
93 static struct atmel_nand_data atstk1006_nand_data __initdata = {
94 .cle = 21,
95 .ale = 22,
96 .rdy_pin = GPIO_PIN_PB(30),
97 .enable_pin = GPIO_PIN_PB(29),
98 .parts = nand_partitions,
99 .num_parts = ARRAY_SIZE(num_partitions),
100 };
101 #endif
102
103 struct eth_addr {
104 u8 addr[6];
105 };
106
107 static struct eth_addr __initdata hw_addr[2];
108 static struct macb_platform_data __initdata eth_data[2] = {
109 {
110 /*
111 * The MDIO pullups on STK1000 are a bit too weak for
112 * the autodetection to work properly, so we have to
113 * mask out everything but the correct address.
114 */
115 .phy_mask = ~(1U << 16),
116 },
117 {
118 .phy_mask = ~(1U << 17),
119 },
120 };
121
122 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
123 static struct at73c213_board_info at73c213_data = {
124 .ssc_id = 0,
125 .shortname = "AVR32 STK1000 external DAC",
126 };
127 #endif
128
129 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
130 static struct spi_board_info spi0_board_info[] __initdata = {
131 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
132 {
133 /* AT73C213 */
134 .modalias = "at73c213",
135 .max_speed_hz = 200000,
136 .chip_select = 0,
137 .mode = SPI_MODE_1,
138 .platform_data = &at73c213_data,
139 },
140 #endif
141 {
142 /* QVGA display */
143 .modalias = "ltv350qv",
144 .max_speed_hz = 16000000,
145 .chip_select = 1,
146 .mode = SPI_MODE_3,
147 },
148 };
149 #endif
150
151 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
152 static struct spi_board_info spi1_board_info[] __initdata = { {
153 /* patch in custom entries here */
154 } };
155 #endif
156
157 /*
158 * The next two functions should go away as the boot loader is
159 * supposed to initialize the macb address registers with a valid
160 * ethernet address. But we need to keep it around for a while until
161 * we can be reasonably sure the boot loader does this.
162 *
163 * The phy_id is ignored as the driver will probe for it.
164 */
parse_tag_ethernet(struct tag * tag)165 static int __init parse_tag_ethernet(struct tag *tag)
166 {
167 int i;
168
169 i = tag->u.ethernet.mac_index;
170 if (i < ARRAY_SIZE(hw_addr))
171 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
172 sizeof(hw_addr[i].addr));
173
174 return 0;
175 }
176 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
177
set_hw_addr(struct platform_device * pdev)178 static void __init set_hw_addr(struct platform_device *pdev)
179 {
180 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
181 const u8 *addr;
182 void __iomem *regs;
183 struct clk *pclk;
184
185 if (!res)
186 return;
187 if (pdev->id >= ARRAY_SIZE(hw_addr))
188 return;
189
190 addr = hw_addr[pdev->id].addr;
191 if (!is_valid_ether_addr(addr))
192 return;
193
194 /*
195 * Since this is board-specific code, we'll cheat and use the
196 * physical address directly as we happen to know that it's
197 * the same as the virtual address.
198 */
199 regs = (void __iomem __force *)res->start;
200 pclk = clk_get(&pdev->dev, "pclk");
201 if (IS_ERR(pclk))
202 return;
203
204 clk_enable(pclk);
205 __raw_writel((addr[3] << 24) | (addr[2] << 16)
206 | (addr[1] << 8) | addr[0], regs + 0x98);
207 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
208 clk_disable(pclk);
209 clk_put(pclk);
210 }
211
212 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
atstk1002_setup_extdac(void)213 static void __init atstk1002_setup_extdac(void)
214 {
215 struct clk *gclk;
216 struct clk *pll;
217
218 gclk = clk_get(NULL, "gclk0");
219 if (IS_ERR(gclk))
220 goto err_gclk;
221 pll = clk_get(NULL, "pll0");
222 if (IS_ERR(pll))
223 goto err_pll;
224
225 if (clk_set_parent(gclk, pll)) {
226 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
227 goto err_set_clk;
228 }
229
230 at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);
231 at73c213_data.dac_clk = gclk;
232
233 err_set_clk:
234 clk_put(pll);
235 err_pll:
236 clk_put(gclk);
237 err_gclk:
238 return;
239 }
240 #else
atstk1002_setup_extdac(void)241 static void __init atstk1002_setup_extdac(void)
242 {
243
244 }
245 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
246
setup_board(void)247 void __init setup_board(void)
248 {
249 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
250 at32_map_usart(0, 1, 0); /* USART 0/B: /dev/ttyS1, IRDA */
251 #else
252 at32_map_usart(1, 0, 0); /* USART 1/A: /dev/ttyS0, DB9 */
253 #endif
254 /* USART 2/unused: expansion connector */
255 at32_map_usart(3, 2, 0); /* USART 3/C: /dev/ttyS2, DB9 */
256
257 at32_setup_serial_console(0);
258 }
259
260 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
261
262 static struct mci_platform_data __initdata mci0_data = {
263 .slot[0] = {
264 .bus_width = 4,
265
266 /* MMC card detect requires MACB0 *NOT* be used */
267 #ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
268 .detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
269 .wp_pin = GPIO_PIN_PC(15), /* gpio31/sdwp */
270 #else
271 .detect_pin = -ENODEV,
272 .wp_pin = -ENODEV,
273 #endif /* SW6 for sd{cd,wp} routing */
274 },
275 };
276
277 #endif /* SW2 for MMC signal routing */
278
atstk1002_init(void)279 static int __init atstk1002_init(void)
280 {
281 /*
282 * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
283 * SDRAM-specific pins so that nobody messes with them.
284 */
285 at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
286
287 #ifdef CONFIG_BOARD_ATSTK1006
288 smc_set_timing(&nand_config, &nand_timing);
289 smc_set_configuration(3, &nand_config);
290 at32_add_device_nand(0, &atstk1006_nand_data);
291 #endif
292
293 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
294 at32_add_device_usart(1);
295 #else
296 at32_add_device_usart(0);
297 #endif
298 at32_add_device_usart(2);
299
300 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
301 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
302 #endif
303 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
304 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
305 #endif
306 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
307 at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
308 #endif
309 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
310 at32_add_device_mci(0, &mci0_data);
311 #endif
312 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
313 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
314 #else
315 at32_add_device_lcdc(0, &atstk1000_lcdc_data,
316 fbmem_start, fbmem_size,
317 ATMEL_LCDC_PRI_24BIT | ATMEL_LCDC_PRI_CONTROL);
318 #endif
319 at32_add_device_usba(0, NULL);
320 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
321 at32_add_device_ssc(0, ATMEL_SSC_TX);
322 #endif
323
324 atstk1000_setup_j2_leds();
325 atstk1002_setup_extdac();
326
327 return 0;
328 }
329 postcore_initcall(atstk1002_init);
330