1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/powerpc/platforms/83xx/mpc832x_rdb.c
4 *
5 * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
6 *
7 * Description:
8 * MPC832x RDB board specific routines.
9 * This file is based on mpc832x_mds.c and mpc8313_rdb.c
10 * Author: Michael Barkowski <michael.barkowski@freescale.com>
11 */
12
13#include <linux/pci.h>
14#include <linux/interrupt.h>
15#include <linux/spi/spi.h>
16#include <linux/spi/mmc_spi.h>
17#include <linux/mmc/host.h>
18#include <linux/of.h>
19#include <linux/of_address.h>
20#include <linux/of_irq.h>
21#include <linux/platform_device.h>
22#include <linux/fsl_devices.h>
23
24#include <asm/time.h>
25#include <asm/ipic.h>
26#include <asm/udbg.h>
27#include <soc/fsl/qe/qe.h>
28#include <sysdev/fsl_soc.h>
29#include <sysdev/fsl_pci.h>
30
31#include "mpc83xx.h"
32
33#undef DEBUG
34#ifdef DEBUG
35#define DBG(fmt...) udbg_printf(fmt)
36#else
37#define DBG(fmt...)
38#endif
39
40#ifdef CONFIG_QUICC_ENGINE
41static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
42 struct spi_board_info *board_infos,
43 unsigned int num_board_infos,
44 void (*cs_control)(struct spi_device *dev,
45 bool on))
46{
47 struct device_node *np;
48 unsigned int i = 0;
49
50 for_each_compatible_node(np, type, compatible) {
51 int ret;
52 unsigned int j;
53 const void *prop;
54 struct resource res[2];
55 struct platform_device *pdev;
56 struct fsl_spi_platform_data pdata = {
57 .cs_control = cs_control,
58 };
59
60 memset(res, 0, sizeof(res));
61
62 pdata.sysclk = sysclk;
63
64 prop = of_get_property(node: np, name: "reg", NULL);
65 if (!prop)
66 goto err;
67 pdata.bus_num = *(u32 *)prop;
68
69 prop = of_get_property(node: np, name: "cell-index", NULL);
70 if (prop)
71 i = *(u32 *)prop;
72
73 prop = of_get_property(node: np, name: "mode", NULL);
74 if (prop && !strcmp(prop, "cpu-qe"))
75 pdata.flags = SPI_QE_CPU_MODE;
76
77 for (j = 0; j < num_board_infos; j++) {
78 if (board_infos[j].bus_num == pdata.bus_num)
79 pdata.max_chipselect++;
80 }
81
82 if (!pdata.max_chipselect)
83 continue;
84
85 ret = of_address_to_resource(dev: np, index: 0, r: &res[0]);
86 if (ret)
87 goto err;
88
89 ret = of_irq_to_resource(dev: np, index: 0, r: &res[1]);
90 if (ret <= 0)
91 goto err;
92
93 pdev = platform_device_alloc(name: "mpc83xx_spi", id: i);
94 if (!pdev)
95 goto err;
96
97 ret = platform_device_add_data(pdev, data: &pdata, size: sizeof(pdata));
98 if (ret)
99 goto unreg;
100
101 ret = platform_device_add_resources(pdev, res,
102 ARRAY_SIZE(res));
103 if (ret)
104 goto unreg;
105
106 ret = platform_device_add(pdev);
107 if (ret)
108 goto unreg;
109
110 goto next;
111unreg:
112 platform_device_put(pdev);
113err:
114 pr_err("%pOF: registration failed\n", np);
115next:
116 i++;
117 }
118
119 return i;
120}
121
122static int __init fsl_spi_init(struct spi_board_info *board_infos,
123 unsigned int num_board_infos,
124 void (*cs_control)(struct spi_device *spi,
125 bool on))
126{
127 u32 sysclk = -1;
128 int ret;
129
130 /* SPI controller is either clocked from QE or SoC clock */
131 sysclk = get_brgfreq();
132 if (sysclk == -1) {
133 sysclk = fsl_get_sys_freq();
134 if (sysclk == -1)
135 return -ENODEV;
136 }
137
138 ret = of_fsl_spi_probe(NULL, compatible: "fsl,spi", sysclk, board_infos,
139 num_board_infos, cs_control);
140 if (!ret)
141 of_fsl_spi_probe(type: "spi", compatible: "fsl_spi", sysclk, board_infos,
142 num_board_infos, cs_control);
143
144 return spi_register_board_info(info: board_infos, n: num_board_infos);
145}
146
147static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
148{
149 pr_debug("%s %d %d\n", __func__, spi_get_chipselect(spi, 0), on);
150 par_io_data_set(port: 3, pin: 13, val: on);
151}
152
153static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
154 .ocr_mask = MMC_VDD_33_34,
155};
156
157static struct spi_board_info mpc832x_spi_boardinfo = {
158 .bus_num = 0x4c0,
159 .chip_select = 0,
160 .max_speed_hz = 50000000,
161 .modalias = "mmc_spi",
162 .platform_data = &mpc832x_mmc_pdata,
163};
164
165static int __init mpc832x_spi_init(void)
166{
167 struct device_node *np;
168
169 par_io_config_pin(port: 3, pin: 0, dir: 3, open_drain: 0, assignment: 1, has_irq: 0); /* SPI1 MOSI, I/O */
170 par_io_config_pin(port: 3, pin: 1, dir: 3, open_drain: 0, assignment: 1, has_irq: 0); /* SPI1 MISO, I/O */
171 par_io_config_pin(port: 3, pin: 2, dir: 3, open_drain: 0, assignment: 1, has_irq: 0); /* SPI1 CLK, I/O */
172 par_io_config_pin(port: 3, pin: 3, dir: 2, open_drain: 0, assignment: 1, has_irq: 0); /* SPI1 SEL, I */
173
174 par_io_config_pin(port: 3, pin: 13, dir: 1, open_drain: 0, assignment: 0, has_irq: 0); /* !SD_CS, O */
175 par_io_config_pin(port: 3, pin: 14, dir: 2, open_drain: 0, assignment: 0, has_irq: 0); /* SD_INSERT, I */
176 par_io_config_pin(port: 3, pin: 15, dir: 2, open_drain: 0, assignment: 0, has_irq: 0); /* SD_PROTECT,I */
177
178 /*
179 * Don't bother with legacy stuff when device tree contains
180 * mmc-spi-slot node.
181 */
182 np = of_find_compatible_node(NULL, NULL, compat: "mmc-spi-slot");
183 of_node_put(node: np);
184 if (np)
185 return 0;
186 return fsl_spi_init(board_infos: &mpc832x_spi_boardinfo, num_board_infos: 1, cs_control: mpc83xx_spi_cs_control);
187}
188machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
189#endif /* CONFIG_QUICC_ENGINE */
190
191/* ************************************************************************
192 *
193 * Setup the architecture
194 *
195 */
196static void __init mpc832x_rdb_setup_arch(void)
197{
198#if defined(CONFIG_QUICC_ENGINE)
199 struct device_node *np;
200#endif
201
202 mpc83xx_setup_arch();
203
204#ifdef CONFIG_QUICC_ENGINE
205 if ((np = of_find_node_by_name(NULL, name: "par_io")) != NULL) {
206 par_io_init(np);
207 of_node_put(node: np);
208
209 for_each_node_by_name(np, "ucc")
210 par_io_of_config(np);
211 }
212#endif /* CONFIG_QUICC_ENGINE */
213}
214
215machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
216
217define_machine(mpc832x_rdb) {
218 .name = "MPC832x RDB",
219 .compatible = "MPC832xRDB",
220 .setup_arch = mpc832x_rdb_setup_arch,
221 .discover_phbs = mpc83xx_setup_pci,
222 .init_IRQ = mpc83xx_ipic_init_IRQ,
223 .get_irq = ipic_get_irq,
224 .restart = mpc83xx_restart,
225 .time_init = mpc83xx_time_init,
226 .progress = udbg_progress,
227};
228

source code of linux/arch/powerpc/platforms/83xx/mpc832x_rdb.c