Hi,Newbie disclaimer: I'm new to this list, and to kernel development, so I apologise if any of my questions are stupid.
I have taken on the task of porting to the RouterBOARD CRS125-24G-1S. I have a few specific questions so far and hoped someone would be willing to provide me with some pointers:
1) This device has an SPI LCD touchscreen. I am unsure where to put a driver for this, as I couldn't find any existing devices with LCD screens. This is a particularly interesting feature that I hope to get working.
2) How might I determine the appropriate partition layout for this device. I assume this needs to match the Mikrotik layout in order for their bootloader to work, and to avoid overwriting data needed for WiFi drivers in the wireless version of the product. Unfortunately, my understanding of this part is currently very limited.
3) This device has a speaker connected to a GPIO. I am able to make this click using the LED driver, but is there a driver available to make this beep, play Auld Lang Syne, etc?
Currently I have NAND and LEDs working, Ethernet working 50% (it won't receive, not sure why not yet, but I will investigate further when I start work on the Ethernet switch). I've attached my basic code so far.
Thanks, Charlie
/* * MikroTik Cloud Router Switch CRS125G support * * Copyright (C) 2012 Stijn Tintel <[email protected]> * Copyright (C) 2012 Gabor Juhos <[email protected]> * Copyright (C) 2015 Charlie Smurthwaite <[email protected]> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. */ #define pr_fmt(fmt) "crs125g: " fmt #include <linux/phy.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/ath9k_platform.h> #include <linux/ar8216_platform.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> #include <linux/spi/spi.h> #include <linux/spi/flash.h> #include <linux/routerboot.h> #include <linux/gpio.h> #include <asm/prom.h> #include <asm/mach-ath79/ath79.h> #include <asm/mach-ath79/ath79_spi_platform.h> #include <asm/mach-ath79/ar71xx_regs.h> #include "common.h" #include "dev-eth.h" #include "dev-m25p80.h" #include "dev-nfc.h" #include "dev-usb.h" #include "dev-spi.h" #include "dev-wmac.h" #include "machtypes.h" #include "routerboot.h" #include "dev-leds-gpio.h" #define CRS125G_GPIO_NAND_NCE 14 /* Partitions are copied from RB2011 and therefore likely incorrect. */ static struct mtd_partition crs125g_nand_partitions[] = { { .name = "booter", .offset = 0, .size = (256 * 1024), .mask_flags = MTD_WRITEABLE, }, { .name = "kernel", .offset = (256 * 1024), .size = (4 * 1024 * 1024) - (256 * 1024), }, { .name = "rootfs", .offset = MTDPART_OFS_NXTBLK, .size = MTDPART_SIZ_FULL, }, }; /* NAND works, copied from RB2011. Part: TC58DVG02D5TA00 */ static void crs125g_nand_select_chip(int chip_no) { switch (chip_no) { case 0: gpio_set_value(CRS125G_GPIO_NAND_NCE, 0); break; default: gpio_set_value(CRS125G_GPIO_NAND_NCE, 1); break; } ndelay(500); } static struct nand_ecclayout crs125g_nand_ecclayout = { .eccbytes = 6, .eccpos = { 8, 9, 10, 13, 14, 15 }, .oobavail = 9, .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } }; /* Copied from RB2011. Don't know if this is necessary. */ static int crs125g_nand_scan_fixup(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; if (mtd->writesize == 512) { /* * Use the OLD Yaffs-1 OOB layout, otherwise RouterBoot * will not be able to find the kernel that we load. */ chip->ecc.layout = &crs125g_nand_ecclayout; } return 0; } void __init crs125g_nand_init(void) { gpio_request_one(CRS125G_GPIO_NAND_NCE, GPIOF_OUT_INIT_HIGH, "NAND nCE"); ath79_nfc_set_scan_fixup(crs125g_nand_scan_fixup); ath79_nfc_set_parts(crs125g_nand_partitions, ARRAY_SIZE(crs125g_nand_partitions)); ath79_nfc_set_select_chip(crs125g_nand_select_chip); ath79_nfc_set_swap_dma(true); ath79_register_nfc(); } /* GPIO CS for LCD display. This device uses a shared MOSI/MISO Pin * nCS: 4 * DCX: 5 * SCK: 6 * I/O: 7 */ static struct ath79_spi_controller_data ath79_spi0_cdata = { .cs_type = ATH79_SPI_CS_TYPE_GPIO, .cs_line = 4, .is_flash = false }; /* Set to spidev for now, I haven't got a driver yet. */ static struct spi_board_info ath79_spi_info[] = { { .bus_num = 0, .chip_select = 0, .max_speed_hz = 15 * 1000 * 1000, .modalias = "spidev", .mode = SPI_MODE_0, .controller_data = &ath79_spi0_cdata, }, }; /* Only 2 LEDs appear to be available. * There is also speaker. It's here for documentation * until a speaker oscillator driver is available. */ static struct gpio_led crs125g_leds_gpio[] __initdata = { { .name = "LCD", .gpio = 2, .active_low = 0, .default_state = LEDS_GPIO_DEFSTATE_OFF }, { .name = "USR2", .gpio = 11, .active_low = 1, .default_state = LEDS_GPIO_DEFSTATE_ON }, { .name = "SPEAKER", .gpio = 22, .active_low = 0, .default_state = LEDS_GPIO_DEFSTATE_OFF } }; static void __init crs125g_setup(void) { const struct rb_info *info; static struct ath79_spi_platform_data ath79_spi_data; info = rb_init_info((void *) KSEG1ADDR(0x1f000000), 0x10000); crs125g_nand_init(); ath79_spi_data.bus_num = 0; ath79_spi_data.num_chipselect = ARRAY_SIZE(ath79_spi_info); ath79_register_spi(&ath79_spi_data, ath79_spi_info, ARRAY_SIZE(ath79_spi_info)); ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 | AR934X_ETH_CFG_SW_ONLY_MODE); /* eth0 is connected to a QCA8513L. This is useless until we an initialize the switch. */ ath79_register_mdio(0, 0x0); ath79_init_mac(ath79_eth0_data.mac_addr, ath79_mac_base, 0); ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII; ath79_eth0_data.speed = SPEED_1000; ath79_eth0_data.duplex = DUPLEX_FULL; ath79_register_eth(0); /* eth1 is connected to the internal switch. This is likely useless and will be removed. */ ath79_register_mdio(1, 0x0); ath79_init_mac(ath79_eth1_data.mac_addr, ath79_mac_base, 1); ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII; ath79_register_eth(1); ath79_register_leds_gpio(-1, ARRAY_SIZE(crs125g_leds_gpio), crs125g_leds_gpio); } MIPS_MACHINE(ATH79_MACH_CRS125G, "crs125g", "RouterBOARD CRS125-24G-1S", crs125g_setup);
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