1 /* 2 * (C) Copyright 2011 3 * egnite GmbH <info@egnite.de> 4 * 5 * (C) Copyright 2010 6 * Ole Reinhardt <ole.reinhardt@thermotemp.de> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 /* 12 * Ethernut 5 general board support 13 * 14 * Ethernut is an open source hardware and software project for 15 * embedded Ethernet devices. Hardware layouts and CAD files are 16 * freely available under BSD-like license. 17 * 18 * Ethernut 5 is the first member of the Ethernut board family 19 * with U-Boot and Linux support. This implementation is based 20 * on the original work done by Ole Reinhardt, but heavily modified 21 * to support additional features and the latest board revision 5.0F. 22 * 23 * Main board components are by default: 24 * 25 * Atmel AT91SAM9XE512 CPU with 512 kBytes NOR Flash 26 * 2 x 64 MBytes Micron MT48LC32M16A2P SDRAM 27 * 512 MBytes Micron MT29F4G08ABADA NAND Flash 28 * 4 MBytes Atmel AT45DB321D DataFlash 29 * SMSC LAN8710 Ethernet PHY 30 * Atmel ATmega168 MCU used for power management 31 * Linear Technology LTC4411 PoE controller 32 * 33 * U-Boot relevant board interfaces are: 34 * 35 * 100 Mbit Ethernet with IEEE 802.3af PoE 36 * RS-232 serial port 37 * USB host and device 38 * MMC/SD-Card slot 39 * Expansion port with I2C, SPI and more... 40 * 41 * Typically the U-Boot image is loaded from serial DataFlash into 42 * SDRAM by the samboot boot loader, which is located in internal 43 * NOR Flash and provides all essential initializations like CPU 44 * and peripheral clocks and, of course, the SDRAM configuration. 45 * 46 * For testing purposes it is also possibly to directly transfer 47 * the image into SDRAM via JTAG. A tested configuration exists 48 * for the Turtelizer 2 hardware dongle and the OpenOCD software. 49 * In this case the latter will do the basic hardware configuration 50 * via its reset-init script. 51 * 52 * For additional information visit the project home page at 53 * http://www.ethernut.de/ 54 */ 55 56 #include <common.h> 57 #include <net.h> 58 #include <netdev.h> 59 #include <miiphy.h> 60 #include <i2c.h> 61 #include <spi.h> 62 #include <dataflash.h> 63 #include <mmc.h> 64 #include <atmel_mci.h> 65 66 #include <asm/arch/at91sam9260.h> 67 #include <asm/arch/at91sam9260_matrix.h> 68 #include <asm/arch/at91sam9_smc.h> 69 #include <asm/arch/at91_common.h> 70 #include <asm/arch/at91_pmc.h> 71 #include <asm/arch/at91_spi.h> 72 #include <asm/arch/gpio.h> 73 #include <asm/io.h> 74 75 #include "ethernut5_pwrman.h" 76 77 DECLARE_GLOBAL_DATA_PTR; 78 79 AT91S_DATAFLASH_INFO dataflash_info[CONFIG_SYS_MAX_DATAFLASH_BANKS]; 80 81 struct dataflash_addr cs[CONFIG_SYS_MAX_DATAFLASH_BANKS] = { 82 {CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0, 0} 83 }; 84 85 /* 86 * In fact we have 7 partitions, but u-boot supports 5 only. This is 87 * no big deal, because the first partition is reserved for applications 88 * and the last one is used by Nut/OS. Both need not to be visible here. 89 */ 90 dataflash_protect_t area_list[NB_DATAFLASH_AREA] = { 91 { 0x00021000, 0x00041FFF, FLAG_PROTECT_SET, 0, "setup" }, 92 { 0x00042000, 0x000C5FFF, FLAG_PROTECT_SET, 0, "uboot" }, 93 { 0x000C6000, 0x00359FFF, FLAG_PROTECT_SET, 0, "kernel" }, 94 { 0x0035A000, 0x003DDFFF, FLAG_PROTECT_SET, 0, "nutos" }, 95 { 0x003DE000, 0x003FEFFF, FLAG_PROTECT_CLEAR, 0, "env" } 96 }; 97 98 /* 99 * This is called last during early initialization. Most of the basic 100 * hardware interfaces are up and running. 101 * 102 * The SDRAM hardware has been configured by the first stage boot loader. 103 * We only need to announce its size, using u-boot's memory check. 104 */ 105 int dram_init(void) 106 { 107 gd->ram_size = get_ram_size( 108 (void *)CONFIG_SYS_SDRAM_BASE, 109 CONFIG_SYS_SDRAM_SIZE); 110 return 0; 111 } 112 113 #ifdef CONFIG_CMD_NAND 114 static void ethernut5_nand_hw_init(void) 115 { 116 struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC; 117 struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX; 118 unsigned long csa; 119 120 /* Assign CS3 to NAND/SmartMedia Interface */ 121 csa = readl(&matrix->ebicsa); 122 csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA; 123 writel(csa, &matrix->ebicsa); 124 125 /* Configure SMC CS3 for NAND/SmartMedia */ 126 writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) | 127 AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0), 128 &smc->cs[3].setup); 129 writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(3) | 130 AT91_SMC_PULSE_NRD(3) | AT91_SMC_PULSE_NCS_RD(3), 131 &smc->cs[3].pulse); 132 writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5), 133 &smc->cs[3].cycle); 134 writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE | 135 AT91_SMC_MODE_EXNW_DISABLE | 136 AT91_SMC_MODE_DBW_8 | 137 AT91_SMC_MODE_TDF_CYCLE(2), 138 &smc->cs[3].mode); 139 140 #ifdef CONFIG_SYS_NAND_READY_PIN 141 /* Ready pin is optional. */ 142 at91_set_pio_input(CONFIG_SYS_NAND_READY_PIN, 1); 143 #endif 144 at91_set_pio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1); 145 } 146 #endif 147 148 /* 149 * This is called first during late initialization. 150 */ 151 int board_init(void) 152 { 153 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; 154 155 /* Enable clocks for all PIOs */ 156 writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) | 157 (1 << ATMEL_ID_PIOC), 158 &pmc->pcer); 159 /* Set adress of boot parameters. */ 160 gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100; 161 /* Initialize UARTs and power management. */ 162 at91_seriald_hw_init(); 163 ethernut5_power_init(); 164 #ifdef CONFIG_CMD_NAND 165 ethernut5_nand_hw_init(); 166 #endif 167 #ifdef CONFIG_HAS_DATAFLASH 168 at91_spi0_hw_init(1 << 0); 169 #endif 170 return 0; 171 } 172 173 #ifdef CONFIG_MACB 174 /* 175 * This is optionally called last during late initialization. 176 */ 177 int board_eth_init(bd_t *bis) 178 { 179 const char *devname; 180 unsigned short mode; 181 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; 182 183 /* Enable on-chip EMAC clock. */ 184 writel(1 << ATMEL_ID_EMAC0, &pmc->pcer); 185 /* Need to reset PHY via power management. */ 186 ethernut5_phy_reset(); 187 /* Set peripheral pins. */ 188 at91_macb_hw_init(); 189 /* Basic EMAC initialization. */ 190 if (macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, CONFIG_PHY_ID)) 191 return -1; 192 /* 193 * Early board revisions have a pull-down at the PHY's MODE0 194 * strap pin, which forces the PHY into power down. Here we 195 * switch to all-capable mode. 196 */ 197 devname = miiphy_get_current_dev(); 198 if (miiphy_read(devname, 0, 18, &mode) == 0) { 199 /* Set mode[2:0] to 0b111. */ 200 mode |= 0x00E0; 201 miiphy_write(devname, 0, 18, mode); 202 /* Soft reset overrides strap pins. */ 203 miiphy_write(devname, 0, MII_BMCR, BMCR_RESET); 204 } 205 /* Sync environment with network devices, needed for nfsroot. */ 206 return eth_init(gd->bd); 207 } 208 #endif 209 210 #ifdef CONFIG_GENERIC_ATMEL_MCI 211 int board_mmc_init(bd_t *bd) 212 { 213 struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; 214 215 /* Enable MCI clock. */ 216 writel(1 << ATMEL_ID_MCI, &pmc->pcer); 217 /* Initialize MCI hardware. */ 218 at91_mci_hw_init(); 219 /* Register the device. */ 220 return atmel_mci_init((void *)ATMEL_BASE_MCI); 221 } 222 223 int board_mmc_getcd(struct mmc *mmc) 224 { 225 return !at91_get_pio_value(CONFIG_SYS_MMC_CD_PIN); 226 } 227 #endif 228 229 #ifdef CONFIG_ATMEL_SPI 230 /* 231 * Note, that u-boot uses different code for SPI bus access. While 232 * memory routines use automatic chip select control, the serial 233 * flash support requires 'manual' GPIO control. Thus, we switch 234 * modes. 235 */ 236 void spi_cs_activate(struct spi_slave *slave) 237 { 238 /* Enable NPCS0 in GPIO mode. This disables peripheral control. */ 239 at91_set_pio_output(AT91_PIO_PORTA, 3, 0); 240 } 241 242 void spi_cs_deactivate(struct spi_slave *slave) 243 { 244 /* Disable NPCS0 in GPIO mode. */ 245 at91_set_pio_output(AT91_PIO_PORTA, 3, 1); 246 /* Switch back to peripheral chip select control. */ 247 at91_set_a_periph(AT91_PIO_PORTA, 3, 1); 248 } 249 250 int spi_cs_is_valid(unsigned int bus, unsigned int cs) 251 { 252 return bus == 0 && cs == 0; 253 } 254 #endif 255