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Linux/arch/avr32/boards/atstk1000/atstk1002.c

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  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  */
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 
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
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
242 static void __init atstk1002_setup_extdac(void)
243 {
244 
245 }
246 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
247 
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 
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, &eth_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, &eth_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 

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