diff options
Diffstat (limited to 'arch/powerpc/platforms/83xx/mpc832x_rdb.c')
| -rw-r--r-- | arch/powerpc/platforms/83xx/mpc832x_rdb.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c new file mode 100644 index 000000000..1114b6a11 --- /dev/null +++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c @@ -0,0 +1,228 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * arch/powerpc/platforms/83xx/mpc832x_rdb.c + * + * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved. + * + * Description: + * MPC832x RDB board specific routines. + * This file is based on mpc832x_mds.c and mpc8313_rdb.c + * Author: Michael Barkowski <michael.barkowski@freescale.com> + */ + +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/spi/spi.h> +#include <linux/spi/mmc_spi.h> +#include <linux/mmc/host.h> +#include <linux/of_platform.h> +#include <linux/fsl_devices.h> + +#include <asm/time.h> +#include <asm/ipic.h> +#include <asm/udbg.h> +#include <soc/fsl/qe/qe.h> +#include <sysdev/fsl_soc.h> +#include <sysdev/fsl_pci.h> + +#include "mpc83xx.h" + +#undef DEBUG +#ifdef DEBUG +#define DBG(fmt...) udbg_printf(fmt) +#else +#define DBG(fmt...) +#endif + +#ifdef CONFIG_QUICC_ENGINE +static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk, + struct spi_board_info *board_infos, + unsigned int num_board_infos, + void (*cs_control)(struct spi_device *dev, + bool on)) +{ + struct device_node *np; + unsigned int i = 0; + + for_each_compatible_node(np, type, compatible) { + int ret; + unsigned int j; + const void *prop; + struct resource res[2]; + struct platform_device *pdev; + struct fsl_spi_platform_data pdata = { + .cs_control = cs_control, + }; + + memset(res, 0, sizeof(res)); + + pdata.sysclk = sysclk; + + prop = of_get_property(np, "reg", NULL); + if (!prop) + goto err; + pdata.bus_num = *(u32 *)prop; + + prop = of_get_property(np, "cell-index", NULL); + if (prop) + i = *(u32 *)prop; + + prop = of_get_property(np, "mode", NULL); + if (prop && !strcmp(prop, "cpu-qe")) + pdata.flags = SPI_QE_CPU_MODE; + + for (j = 0; j < num_board_infos; j++) { + if (board_infos[j].bus_num == pdata.bus_num) + pdata.max_chipselect++; + } + + if (!pdata.max_chipselect) + continue; + + ret = of_address_to_resource(np, 0, &res[0]); + if (ret) + goto err; + + ret = of_irq_to_resource(np, 0, &res[1]); + if (ret <= 0) + goto err; + + pdev = platform_device_alloc("mpc83xx_spi", i); + if (!pdev) + goto err; + + ret = platform_device_add_data(pdev, &pdata, sizeof(pdata)); + if (ret) + goto unreg; + + ret = platform_device_add_resources(pdev, res, + ARRAY_SIZE(res)); + if (ret) + goto unreg; + + ret = platform_device_add(pdev); + if (ret) + goto unreg; + + goto next; +unreg: + platform_device_put(pdev); +err: + pr_err("%pOF: registration failed\n", np); +next: + i++; + } + + return i; +} + +static int __init fsl_spi_init(struct spi_board_info *board_infos, + unsigned int num_board_infos, + void (*cs_control)(struct spi_device *spi, + bool on)) +{ + u32 sysclk = -1; + int ret; + + /* SPI controller is either clocked from QE or SoC clock */ + sysclk = get_brgfreq(); + if (sysclk == -1) { + sysclk = fsl_get_sys_freq(); + if (sysclk == -1) + return -ENODEV; + } + + ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos, + num_board_infos, cs_control); + if (!ret) + of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos, + num_board_infos, cs_control); + + return spi_register_board_info(board_infos, num_board_infos); +} + +static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on) +{ + pr_debug("%s %d %d\n", __func__, spi->chip_select, on); + par_io_data_set(3, 13, on); +} + +static struct mmc_spi_platform_data mpc832x_mmc_pdata = { + .ocr_mask = MMC_VDD_33_34, +}; + +static struct spi_board_info mpc832x_spi_boardinfo = { + .bus_num = 0x4c0, + .chip_select = 0, + .max_speed_hz = 50000000, + .modalias = "mmc_spi", + .platform_data = &mpc832x_mmc_pdata, +}; + +static int __init mpc832x_spi_init(void) +{ + par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */ + par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */ + par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */ + par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */ + + par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */ + par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */ + par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */ + + /* + * Don't bother with legacy stuff when device tree contains + * mmc-spi-slot node. + */ + if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot")) + return 0; + return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control); +} +machine_device_initcall(mpc832x_rdb, mpc832x_spi_init); +#endif /* CONFIG_QUICC_ENGINE */ + +/* ************************************************************************ + * + * Setup the architecture + * + */ +static void __init mpc832x_rdb_setup_arch(void) +{ +#if defined(CONFIG_QUICC_ENGINE) + struct device_node *np; +#endif + + mpc83xx_setup_arch(); + +#ifdef CONFIG_QUICC_ENGINE + if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) { + par_io_init(np); + of_node_put(np); + + for_each_node_by_name(np, "ucc") + par_io_of_config(np); + } +#endif /* CONFIG_QUICC_ENGINE */ +} + +machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices); + +/* + * Called very early, MMU is off, device-tree isn't unflattened + */ +static int __init mpc832x_rdb_probe(void) +{ + return of_machine_is_compatible("MPC832xRDB"); +} + +define_machine(mpc832x_rdb) { + .name = "MPC832x RDB", + .probe = mpc832x_rdb_probe, + .setup_arch = mpc832x_rdb_setup_arch, + .init_IRQ = mpc83xx_ipic_init_IRQ, + .get_irq = ipic_get_irq, + .restart = mpc83xx_restart, + .time_init = mpc83xx_time_init, + .calibrate_decr = generic_calibrate_decr, + .progress = udbg_progress, +}; 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