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Linux/arch/powerpc/platforms/83xx/mpc832x_rdb.c

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  1 /*
  2  * arch/powerpc/platforms/83xx/mpc832x_rdb.c
  3  *
  4  * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
  5  *
  6  * Description:
  7  * MPC832x RDB board specific routines.
  8  * This file is based on mpc832x_mds.c and mpc8313_rdb.c
  9  * Author: Michael Barkowski <michael.barkowski@freescale.com>
 10  *
 11  * This program is free software; you can redistribute  it and/or modify it
 12  * under  the terms of  the GNU General  Public License as published by the
 13  * Free Software Foundation;  either version 2 of the  License, or (at your
 14  * option) any later version.
 15  */
 16 
 17 #include <linux/pci.h>
 18 #include <linux/interrupt.h>
 19 #include <linux/spi/spi.h>
 20 #include <linux/spi/mmc_spi.h>
 21 #include <linux/mmc/host.h>
 22 #include <linux/of_platform.h>
 23 #include <linux/fsl_devices.h>
 24 
 25 #include <asm/time.h>
 26 #include <asm/ipic.h>
 27 #include <asm/udbg.h>
 28 #include <soc/fsl/qe/qe.h>
 29 #include <soc/fsl/qe/qe_ic.h>
 30 #include <sysdev/fsl_soc.h>
 31 #include <sysdev/fsl_pci.h>
 32 
 33 #include "mpc83xx.h"
 34 
 35 #undef DEBUG
 36 #ifdef DEBUG
 37 #define DBG(fmt...) udbg_printf(fmt)
 38 #else
 39 #define DBG(fmt...)
 40 #endif
 41 
 42 #ifdef CONFIG_QUICC_ENGINE
 43 static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
 44                                    struct spi_board_info *board_infos,
 45                                    unsigned int num_board_infos,
 46                                    void (*cs_control)(struct spi_device *dev,
 47                                                       bool on))
 48 {
 49         struct device_node *np;
 50         unsigned int i = 0;
 51 
 52         for_each_compatible_node(np, type, compatible) {
 53                 int ret;
 54                 unsigned int j;
 55                 const void *prop;
 56                 struct resource res[2];
 57                 struct platform_device *pdev;
 58                 struct fsl_spi_platform_data pdata = {
 59                         .cs_control = cs_control,
 60                 };
 61 
 62                 memset(res, 0, sizeof(res));
 63 
 64                 pdata.sysclk = sysclk;
 65 
 66                 prop = of_get_property(np, "reg", NULL);
 67                 if (!prop)
 68                         goto err;
 69                 pdata.bus_num = *(u32 *)prop;
 70 
 71                 prop = of_get_property(np, "cell-index", NULL);
 72                 if (prop)
 73                         i = *(u32 *)prop;
 74 
 75                 prop = of_get_property(np, "mode", NULL);
 76                 if (prop && !strcmp(prop, "cpu-qe"))
 77                         pdata.flags = SPI_QE_CPU_MODE;
 78 
 79                 for (j = 0; j < num_board_infos; j++) {
 80                         if (board_infos[j].bus_num == pdata.bus_num)
 81                                 pdata.max_chipselect++;
 82                 }
 83 
 84                 if (!pdata.max_chipselect)
 85                         continue;
 86 
 87                 ret = of_address_to_resource(np, 0, &res[0]);
 88                 if (ret)
 89                         goto err;
 90 
 91                 ret = of_irq_to_resource(np, 0, &res[1]);
 92                 if (ret == NO_IRQ)
 93                         goto err;
 94 
 95                 pdev = platform_device_alloc("mpc83xx_spi", i);
 96                 if (!pdev)
 97                         goto err;
 98 
 99                 ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
100                 if (ret)
101                         goto unreg;
102 
103                 ret = platform_device_add_resources(pdev, res,
104                                                     ARRAY_SIZE(res));
105                 if (ret)
106                         goto unreg;
107 
108                 ret = platform_device_add(pdev);
109                 if (ret)
110                         goto unreg;
111 
112                 goto next;
113 unreg:
114                 platform_device_del(pdev);
115 err:
116                 pr_err("%s: registration failed\n", np->full_name);
117 next:
118                 i++;
119         }
120 
121         return i;
122 }
123 
124 static int __init fsl_spi_init(struct spi_board_info *board_infos,
125                                unsigned int num_board_infos,
126                                void (*cs_control)(struct spi_device *spi,
127                                                   bool on))
128 {
129         u32 sysclk = -1;
130         int ret;
131 
132         /* SPI controller is either clocked from QE or SoC clock */
133         sysclk = get_brgfreq();
134         if (sysclk == -1) {
135                 sysclk = fsl_get_sys_freq();
136                 if (sysclk == -1)
137                         return -ENODEV;
138         }
139 
140         ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
141                                num_board_infos, cs_control);
142         if (!ret)
143                 of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
144                                  num_board_infos, cs_control);
145 
146         return spi_register_board_info(board_infos, num_board_infos);
147 }
148 
149 static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
150 {
151         pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
152         par_io_data_set(3, 13, on);
153 }
154 
155 static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
156         .ocr_mask = MMC_VDD_33_34,
157 };
158 
159 static struct spi_board_info mpc832x_spi_boardinfo = {
160         .bus_num = 0x4c0,
161         .chip_select = 0,
162         .max_speed_hz = 50000000,
163         .modalias = "mmc_spi",
164         .platform_data = &mpc832x_mmc_pdata,
165 };
166 
167 static int __init mpc832x_spi_init(void)
168 {
169         par_io_config_pin(3,  0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
170         par_io_config_pin(3,  1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
171         par_io_config_pin(3,  2, 3, 0, 1, 0); /* SPI1 CLK,  I/O */
172         par_io_config_pin(3,  3, 2, 0, 1, 0); /* SPI1 SEL,  I   */
173 
174         par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS,    O */
175         par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
176         par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
177 
178         /*
179          * Don't bother with legacy stuff when device tree contains
180          * mmc-spi-slot node.
181          */
182         if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot"))
183                 return 0;
184         return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
185 }
186 machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
187 #endif /* CONFIG_QUICC_ENGINE */
188 
189 /* ************************************************************************
190  *
191  * Setup the architecture
192  *
193  */
194 static void __init mpc832x_rdb_setup_arch(void)
195 {
196 #if defined(CONFIG_QUICC_ENGINE)
197         struct device_node *np;
198 #endif
199 
200         if (ppc_md.progress)
201                 ppc_md.progress("mpc832x_rdb_setup_arch()", 0);
202 
203         mpc83xx_setup_pci();
204 
205 #ifdef CONFIG_QUICC_ENGINE
206         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
207                 par_io_init(np);
208                 of_node_put(np);
209 
210                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
211                         par_io_of_config(np);
212         }
213 #endif                          /* CONFIG_QUICC_ENGINE */
214 }
215 
216 machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
217 
218 /*
219  * Called very early, MMU is off, device-tree isn't unflattened
220  */
221 static int __init mpc832x_rdb_probe(void)
222 {
223         unsigned long root = of_get_flat_dt_root();
224 
225         return of_flat_dt_is_compatible(root, "MPC832xRDB");
226 }
227 
228 define_machine(mpc832x_rdb) {
229         .name           = "MPC832x RDB",
230         .probe          = mpc832x_rdb_probe,
231         .setup_arch     = mpc832x_rdb_setup_arch,
232         .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
233         .get_irq        = ipic_get_irq,
234         .restart        = mpc83xx_restart,
235         .time_init      = mpc83xx_time_init,
236         .calibrate_decr = generic_calibrate_decr,
237         .progress       = udbg_progress,
238 };
239 

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