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229 lines
5.3 KiB
229 lines
5.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* arch/powerpc/platforms/83xx/mpc832x_rdb.c |
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* |
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* Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved. |
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* |
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* Description: |
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* MPC832x RDB board specific routines. |
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* This file is based on mpc832x_mds.c and mpc8313_rdb.c |
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* Author: Michael Barkowski <[email protected]> |
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*/ |
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#include <linux/pci.h> |
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#include <linux/interrupt.h> |
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#include <linux/spi/spi.h> |
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#include <linux/spi/mmc_spi.h> |
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#include <linux/mmc/host.h> |
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#include <linux/of_platform.h> |
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#include <linux/fsl_devices.h> |
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#include <asm/time.h> |
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#include <asm/ipic.h> |
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#include <asm/udbg.h> |
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#include <soc/fsl/qe/qe.h> |
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#include <sysdev/fsl_soc.h> |
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#include <sysdev/fsl_pci.h> |
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#include "mpc83xx.h" |
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#undef DEBUG |
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#ifdef DEBUG |
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#define DBG(fmt...) udbg_printf(fmt) |
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#else |
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#define DBG(fmt...) |
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#endif |
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#ifdef CONFIG_QUICC_ENGINE |
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static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk, |
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struct spi_board_info *board_infos, |
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unsigned int num_board_infos, |
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void (*cs_control)(struct spi_device *dev, |
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bool on)) |
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{ |
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struct device_node *np; |
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unsigned int i = 0; |
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for_each_compatible_node(np, type, compatible) { |
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int ret; |
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unsigned int j; |
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const void *prop; |
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struct resource res[2]; |
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struct platform_device *pdev; |
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struct fsl_spi_platform_data pdata = { |
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.cs_control = cs_control, |
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}; |
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memset(res, 0, sizeof(res)); |
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pdata.sysclk = sysclk; |
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prop = of_get_property(np, "reg", NULL); |
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if (!prop) |
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goto err; |
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pdata.bus_num = *(u32 *)prop; |
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prop = of_get_property(np, "cell-index", NULL); |
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if (prop) |
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i = *(u32 *)prop; |
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prop = of_get_property(np, "mode", NULL); |
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if (prop && !strcmp(prop, "cpu-qe")) |
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pdata.flags = SPI_QE_CPU_MODE; |
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for (j = 0; j < num_board_infos; j++) { |
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if (board_infos[j].bus_num == pdata.bus_num) |
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pdata.max_chipselect++; |
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} |
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if (!pdata.max_chipselect) |
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continue; |
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ret = of_address_to_resource(np, 0, &res[0]); |
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if (ret) |
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goto err; |
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ret = of_irq_to_resource(np, 0, &res[1]); |
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if (ret <= 0) |
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goto err; |
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pdev = platform_device_alloc("mpc83xx_spi", i); |
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if (!pdev) |
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goto err; |
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ret = platform_device_add_data(pdev, &pdata, sizeof(pdata)); |
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if (ret) |
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goto unreg; |
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ret = platform_device_add_resources(pdev, res, |
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ARRAY_SIZE(res)); |
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if (ret) |
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goto unreg; |
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ret = platform_device_add(pdev); |
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if (ret) |
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goto unreg; |
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goto next; |
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unreg: |
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platform_device_del(pdev); |
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err: |
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pr_err("%pOF: registration failed\n", np); |
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next: |
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i++; |
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} |
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return i; |
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} |
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static int __init fsl_spi_init(struct spi_board_info *board_infos, |
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unsigned int num_board_infos, |
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void (*cs_control)(struct spi_device *spi, |
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bool on)) |
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{ |
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u32 sysclk = -1; |
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int ret; |
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/* SPI controller is either clocked from QE or SoC clock */ |
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sysclk = get_brgfreq(); |
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if (sysclk == -1) { |
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sysclk = fsl_get_sys_freq(); |
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if (sysclk == -1) |
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return -ENODEV; |
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} |
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ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos, |
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num_board_infos, cs_control); |
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if (!ret) |
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of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos, |
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num_board_infos, cs_control); |
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return spi_register_board_info(board_infos, num_board_infos); |
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} |
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static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on) |
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{ |
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pr_debug("%s %d %d\n", __func__, spi->chip_select, on); |
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par_io_data_set(3, 13, on); |
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} |
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static struct mmc_spi_platform_data mpc832x_mmc_pdata = { |
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.ocr_mask = MMC_VDD_33_34, |
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}; |
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static struct spi_board_info mpc832x_spi_boardinfo = { |
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.bus_num = 0x4c0, |
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.chip_select = 0, |
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.max_speed_hz = 50000000, |
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.modalias = "mmc_spi", |
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.platform_data = &mpc832x_mmc_pdata, |
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}; |
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static int __init mpc832x_spi_init(void) |
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{ |
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par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */ |
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par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */ |
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par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */ |
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par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */ |
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par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */ |
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par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */ |
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par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */ |
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/* |
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* Don't bother with legacy stuff when device tree contains |
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* mmc-spi-slot node. |
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*/ |
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if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot")) |
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return 0; |
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return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control); |
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} |
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machine_device_initcall(mpc832x_rdb, mpc832x_spi_init); |
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#endif /* CONFIG_QUICC_ENGINE */ |
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/* ************************************************************************ |
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* |
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* Setup the architecture |
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* |
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*/ |
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static void __init mpc832x_rdb_setup_arch(void) |
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{ |
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#if defined(CONFIG_QUICC_ENGINE) |
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struct device_node *np; |
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#endif |
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mpc83xx_setup_arch(); |
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#ifdef CONFIG_QUICC_ENGINE |
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if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) { |
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par_io_init(np); |
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of_node_put(np); |
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for_each_node_by_name(np, "ucc") |
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par_io_of_config(np); |
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} |
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#endif /* CONFIG_QUICC_ENGINE */ |
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} |
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machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices); |
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/* |
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* Called very early, MMU is off, device-tree isn't unflattened |
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*/ |
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static int __init mpc832x_rdb_probe(void) |
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{ |
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return of_machine_is_compatible("MPC832xRDB"); |
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} |
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define_machine(mpc832x_rdb) { |
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.name = "MPC832x RDB", |
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.probe = mpc832x_rdb_probe, |
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.setup_arch = mpc832x_rdb_setup_arch, |
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.discover_phbs = mpc83xx_setup_pci, |
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.init_IRQ = mpc83xx_ipic_init_IRQ, |
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.get_irq = ipic_get_irq, |
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.restart = mpc83xx_restart, |
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.time_init = mpc83xx_time_init, |
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.calibrate_decr = generic_calibrate_decr, |
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.progress = udbg_progress, |
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};
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