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 <asm/qe.h>
29 #include <asm/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
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))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
fsl_spi_init(struct spi_board_info * board_infos,unsigned int num_board_infos,void (* cs_control)(struct spi_device * spi,bool on))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
mpc83xx_spi_cs_control(struct spi_device * spi,bool on)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
mpc832x_spi_init(void)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 */
mpc832x_rdb_setup_arch(void)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 qe_reset();
207
208 if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
209 par_io_init(np);
210 of_node_put(np);
211
212 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
213 par_io_of_config(np);
214 }
215 #endif /* CONFIG_QUICC_ENGINE */
216 }
217
218 machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
219
220 /*
221 * Called very early, MMU is off, device-tree isn't unflattened
222 */
mpc832x_rdb_probe(void)223 static int __init mpc832x_rdb_probe(void)
224 {
225 unsigned long root = of_get_flat_dt_root();
226
227 return of_flat_dt_is_compatible(root, "MPC832xRDB");
228 }
229
define_machine(mpc832x_rdb)230 define_machine(mpc832x_rdb) {
231 .name = "MPC832x RDB",
232 .probe = mpc832x_rdb_probe,
233 .setup_arch = mpc832x_rdb_setup_arch,
234 .init_IRQ = mpc83xx_ipic_and_qe_init_IRQ,
235 .get_irq = ipic_get_irq,
236 .restart = mpc83xx_restart,
237 .time_init = mpc83xx_time_init,
238 .calibrate_decr = generic_calibrate_decr,
239 .progress = udbg_progress,
240 };
241