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 .ecc_mode = NAND_ECC_SOFT,
99 .parts = nand_partitions,
100 .num_parts = ARRAY_SIZE(nand_partitions),
101 };
102 #endif
103
104 struct eth_addr {
105 u8 addr[6];
106 };
107
108 static struct eth_addr __initdata hw_addr[2];
109 static struct macb_platform_data __initdata eth_data[2] = {
110 {
111 /*
112 * The MDIO pullups on STK1000 are a bit too weak for
113 * the autodetection to work properly, so we have to
114 * mask out everything but the correct address.
115 */
116 .phy_mask = ~(1U << 16),
117 },
118 {
119 .phy_mask = ~(1U << 17),
120 },
121 };
122
123 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
124 static struct at73c213_board_info at73c213_data = {
125 .ssc_id = 0,
126 .shortname = "AVR32 STK1000 external DAC",
127 };
128 #endif
129
130 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
131 static struct spi_board_info spi0_board_info[] __initdata = {
132 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
133 {
134 /* AT73C213 */
135 .modalias = "at73c213",
136 .max_speed_hz = 200000,
137 .chip_select = 0,
138 .mode = SPI_MODE_1,
139 .platform_data = &at73c213_data,
140 },
141 #endif
142 {
143 /* QVGA display */
144 .modalias = "ltv350qv",
145 .max_speed_hz = 16000000,
146 .chip_select = 1,
147 .mode = SPI_MODE_3,
148 },
149 };
150 #endif
151
152 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
153 static struct spi_board_info spi1_board_info[] __initdata = { {
154 /* patch in custom entries here */
155 } };
156 #endif
157
158 /*
159 * The next two functions should go away as the boot loader is
160 * supposed to initialize the macb address registers with a valid
161 * ethernet address. But we need to keep it around for a while until
162 * we can be reasonably sure the boot loader does this.
163 *
164 * The phy_id is ignored as the driver will probe for it.
165 */
parse_tag_ethernet(struct tag * tag)166 static int __init parse_tag_ethernet(struct tag *tag)
167 {
168 int i;
169
170 i = tag->u.ethernet.mac_index;
171 if (i < ARRAY_SIZE(hw_addr))
172 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
173 sizeof(hw_addr[i].addr));
174
175 return 0;
176 }
177 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
178
set_hw_addr(struct platform_device * pdev)179 static void __init set_hw_addr(struct platform_device *pdev)
180 {
181 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
182 const u8 *addr;
183 void __iomem *regs;
184 struct clk *pclk;
185
186 if (!res)
187 return;
188 if (pdev->id >= ARRAY_SIZE(hw_addr))
189 return;
190
191 addr = hw_addr[pdev->id].addr;
192 if (!is_valid_ether_addr(addr))
193 return;
194
195 /*
196 * Since this is board-specific code, we'll cheat and use the
197 * physical address directly as we happen to know that it's
198 * the same as the virtual address.
199 */
200 regs = (void __iomem __force *)res->start;
201 pclk = clk_get(&pdev->dev, "pclk");
202 if (IS_ERR(pclk))
203 return;
204
205 clk_enable(pclk);
206 __raw_writel((addr[3] << 24) | (addr[2] << 16)
207 | (addr[1] << 8) | addr[0], regs + 0x98);
208 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
209 clk_disable(pclk);
210 clk_put(pclk);
211 }
212
213 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
atstk1002_setup_extdac(void)214 static void __init atstk1002_setup_extdac(void)
215 {
216 struct clk *gclk;
217 struct clk *pll;
218
219 gclk = clk_get(NULL, "gclk0");
220 if (IS_ERR(gclk))
221 goto err_gclk;
222 pll = clk_get(NULL, "pll0");
223 if (IS_ERR(pll))
224 goto err_pll;
225
226 if (clk_set_parent(gclk, pll)) {
227 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
228 goto err_set_clk;
229 }
230
231 at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);
232 at73c213_data.dac_clk = gclk;
233
234 err_set_clk:
235 clk_put(pll);
236 err_pll:
237 clk_put(gclk);
238 err_gclk:
239 return;
240 }
241 #else
atstk1002_setup_extdac(void)242 static void __init atstk1002_setup_extdac(void)
243 {
244
245 }
246 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
247
setup_board(void)248 void __init setup_board(void)
249 {
250 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
251 at32_map_usart(0, 1, 0); /* USART 0/B: /dev/ttyS1, IRDA */
252 #else
253 at32_map_usart(1, 0, 0); /* USART 1/A: /dev/ttyS0, DB9 */
254 #endif
255 /* USART 2/unused: expansion connector */
256 at32_map_usart(3, 2, 0); /* USART 3/C: /dev/ttyS2, DB9 */
257
258 at32_setup_serial_console(0);
259 }
260
261 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
262
263 static struct mci_platform_data __initdata mci0_data = {
264 .slot[0] = {
265 .bus_width = 4,
266
267 /* MMC card detect requires MACB0 *NOT* be used */
268 #ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
269 .detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
270 .wp_pin = GPIO_PIN_PC(15), /* gpio31/sdwp */
271 #else
272 .detect_pin = -ENODEV,
273 .wp_pin = -ENODEV,
274 #endif /* SW6 for sd{cd,wp} routing */
275 },
276 };
277
278 #endif /* SW2 for MMC signal routing */
279
atstk1002_init(void)280 static int __init atstk1002_init(void)
281 {
282 /*
283 * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
284 * SDRAM-specific pins so that nobody messes with them.
285 */
286 at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
287
288 #ifdef CONFIG_BOARD_ATSTK1006
289 smc_set_timing(&nand_config, &nand_timing);
290 smc_set_configuration(3, &nand_config);
291 at32_add_device_nand(0, &atstk1006_nand_data);
292 #endif
293
294 #ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
295 at32_add_device_usart(1);
296 #else
297 at32_add_device_usart(0);
298 #endif
299 at32_add_device_usart(2);
300
301 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
302 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
303 #endif
304 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
305 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
306 #endif
307 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
308 at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
309 #endif
310 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
311 at32_add_device_mci(0, &mci0_data);
312 #endif
313 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
314 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
315 #else
316 at32_add_device_lcdc(0, &atstk1000_lcdc_data,
317 fbmem_start, fbmem_size,
318 ATMEL_LCDC_PRI_24BIT | ATMEL_LCDC_PRI_CONTROL);
319 #endif
320 at32_add_device_usba(0, NULL);
321 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
322 at32_add_device_ssc(0, ATMEL_SSC_TX);
323 #endif
324
325 atstk1000_setup_j2_leds();
326 atstk1002_setup_extdac();
327
328 return 0;
329 }
330 postcore_initcall(atstk1002_init);
331